Maintaining your myelin, Part 2

April 27, 2024April 27, 2024 gettingwell4 4-5 stars Advanced knowledge, Epigenetics, Glutamate, Hippocampus, Immune system, Limbic system, Memory, Neurochemicals, Stress Brain neurons, Control group, Corpus callosum, Neural plasticity, Neurodegenerative disease

Continuing Part 1 with three 2024 preprint studies, starting with an investigation of neuroinflammation in high school athletes:

“Axons are long fibers conducting nerve impulses from nerve cells to synaptic ends. Like electric wires, axons are insulated by the myelin sheath produced by oligodendrocytes (ODC) in the brain or Schwann cells in the periphery. The myelin sheath is vulnerable to mechanical stresses after head injuries, as well as targets for autoimmune attack in multiple sclerosis and degeneration in various white matter diseases.

It is challenging to definitively validate axonal neuroinflammation, because axonal neuroinflammation is only diagnosed at post-mortem autopsy, or wait for more than a decade to potentially witness progression to chronic traumatic encephalopathy, or white matter dementia. Advanced imaging analysis of computed tomography and magnetic resonance imaging are not sensitive enough to identify such microscopic abnormalities.

We developed a sandwich immunoassay detecting dual signals of myelin oligodendrocyte glycoprotein (MOG) and interleukin 1B (IL1B) in human plasma, [IL1B on MOG]. MOG is a transmembrane protein specifically expressed in ODC and Schwann cells membranes, and doesn’t freely exist in plasma. We found that serum from capillary blood is acceptable, and we tested control and athlete samples using only 5 mL samples. When we tested 63 control plasma samples, values were widely distributed over 2 logs, so we focused on longitudinal studies.

Damaged neurons are not easily detectable using conventional physical examinations, because the brain’s inherent adaptability allows it to compensate for localized damage by finding alternate routes. While this adaptability is advantageous, it also means that these concealed lesions can go unnoticed, potentially leading to future complications.

Elevation of [IL1B on MOG] was seen in some athletes who did not show concussion or traumatic brain injury (TBI). While the occurrence of concussion is relatively limited, potential prevalence of subconcussion or subconcussive condition is expected to be substantially higher.

If [IL1B on MOG] levels remain unchanged during this early post-concussion period (2-4 weeks), it may suggest that neuroinflammation has not been induced, potentially providing reassurance for the athletes to return to play. Conversely, if [IL1B on MOG] levels increase within this timeframe, it may indicate the need for intervention or closer monitoring. Thus, there is compelling potential for incorporating this test into concussion guidelines.”

https://www.researchsquare.com/article/rs-3997676/v1 “An approach for the analysis of axonal neuroinflammation by measuring dual biomarkers of oligodendrocytes and inflammatory cytokine in human plasma”

A rodent study investigated the immune system’s influence on oligodendrocyte lineage cells after TBI:

“White matter injury is thought to be a major contributor to long-term cognitive dysfunctions after TBI. This damage occurs partly due to apoptotic death of oligodendrocyte lineage cells (OLCs) after injury, triggered directly by the trauma or in response to degenerating axons.

Our data indicates that depletion of the gut microbiota after TBI impaired remyelination, reduced OLCs proliferation, and required the presence of T cells. This suggests that T cells are an important mechanistic link by which the gut microbiota modulate oligodendrocyte response and white matter recovery after TBI.

Our findings suggest that oligodendrocytes are not passive in the neuroinflammatory and degenerative environment caused by brain trauma, but instead could exert an active role in modulation of immune response.”

https://www.researchsquare.com/article/rs-4289147/v1 “Gut Microbiota Shape Oligodendrocyte Response after Traumatic Brain Injury”

A rodent study investigated whether oligodendrocyte precursor cells had myelination-independent roles in brain aging:

“OPCs, the source cells of myelin-forming cells in the central nervous system, have been linked to brain aging by their compromised differentiation and regeneration capability. Our results demonstrate that macroautophagy influx declines in aged OPCs, which results in the accumulation of senescent OPCs in aged brains. Senescent OPCs impair neuronal plasticity and exacerbate neurodegeneration, eventually leading to cognitive decline.

Inactivation of autophagy in OPCs exhibits a limited effect on myelin thickness but a loss of myelin in middle-aged mice. The loss of myelin observed is an adaptational change to suppressed neuronal plasticity. However, neither the number of OLs nor oligodendrogenesis is altered by inactivation of autophagy in adult OPCs.

The present study indicates that the intervention of senescent OPCs is an additional promising therapeutic strategy for aging and aging-related cognitive deficits. Autophagy regulates senescence by impairing protein turnover, mitochondrial homeostasis, oxidative stress, and maintaining senescence-associated secretory phenotype. Further investigation remains on whether autophagy in OPCs shares the exact mechanism to promote senescence as that in other types of cells.

Considering autophagy declines with aging, our study brings a novel mechanism in brain aging. Declined autophagy causes senescence of OPCs, which impairs neuronal plasticity and exacerbates neurodegeneration via CCL3/5-CCR5 signaling.”

https://www.researchsquare.com/article/rs-3926942/v1 “Impaired Macroautophagy in Oligodendrocyte Precursor Cells Exacerbates Aging-related Cognitive Deficits via a Senescence Associated Signaling”

Maintaining your myelin, Part 1

April 25, 2024April 27, 2024 gettingwell4 4-5 stars Advanced knowledge, Acetylcholine, Brain development, Brainstem, Cerebellum, Cerebrum, Epigenetics, Glutamate, Hypothalamus, Immune system, Limbic system, Lower brain, Memory, Neurochemicals, Stress, Thalamus Brain neurons, Control group, Corpus callosum, Critical period, Embryo development, Genetic factors, Infants, Neural plasticity, Neurodegenerative disease, Prefrontal cortex

Three papers on myelin and oligodendrocytes, starting with a 2023 review:

“Myelin is the spiral ensheathment of axons by a lipid and cholesterol-rich glial cell membrane that reduces capacitance and increases resistance of the axonal membrane. Axonal myelination speeds up nerve conduction velocity as a function of axon diameter.

While myelination proceeds rapidly after birth in the peripheral nervous system, central myelination is a spatially and temporally more regulated process. Ongoing myelination of the human brain has been documented at up to 40 years of age. This late myelination in the adult cortex is followed by exhaustion of oligodendrocyte precursor cells (OPC) with senescence and a gradual loss of myelin integrity in the aging brain.

The brain is well known for its high energy demands, specifically in gray matter areas. In white matter tracts, energy consumption is lower. Myelination poses a unique challenge for axonal energy generation where myelin sheaths cover more than 95% of the axonal surface areas.

Oligodendrocytes help support axonal integrity. Oligodendrocytes survive well in the absence of mitochondrial oxidative phosphorylation, and without signs of myelin loss, cell death, neurodegeneration or secondary inflammation.

Glycolysis products of oligodendroglial origin are readily metabolized in axonal mitochondria. Oligodendroglial metabolic support is critical for larger and faster-spiking myelinated axons that also have a higher density of mitochondria. An essential requirement for the direct transfer of energy-rich metabolites from oligodendrocytes to the myelinated axonal compartment is ‘myelinic channels’ within the myelin sheath.

Interactions of oligodendrocytes and myelin with the underlying axon are complex and exceed the transfer of energy-rich metabolites. Continuous turnover of myelin membranes by lipid degradation and fatty acid beta-oxidation in mitochondria and peroxisomes leads to recycling of acetate residues by fatty acid synthesis and membrane biogenesis.

In human multiple sclerosis (MS) and its animal model myelin oligodendrocyte glycoprotein-experimental autoimmune encephalomyelitis (MOG-EAE), acute inflammatory demyelination is followed by axonal degeneration in lesion sites that is mechanistically not fully understood. It is widely thought that demyelination and the lack of an axon-protective myelin sheath in the presence of numerous inflammatory mediators are the main causes of axon loss.

But unprotected axons improve rather than worsen the overall clinical phenotype of EAE mice which exhibited the same degree of autoimmunity. Thus, ‘bad myelin is worse than no myelin’ because MS-relevant myelin injuries perturb the integrity of myelinic channels and metabolic support.

Dysfunctional or injured oligodendrocytes that do not allow for compensation by any other cell types turn the affected myelin ensheathment into a burden of the underlying axonal energy metabolism, which causes irreversible axon loss. Any loss of myelin integrity, as seen acutely in demyelinating disorders or more gradually in the aging brain, becomes a risk factor for irreversible neurodegeneration.”

https://www.sciencedirect.com/science/article/pii/S0959438823001071 “Expanding the function of oligodendrocytes to brain energy metabolism”

A 2024 review focused on myelin and oligodendrocyte plasticity:

“This review summarizes our current understanding of how myelin is generated, how its function is dynamically regulated, and how oligodendrocytes support the long-term integrity of myelinated axons.

Apart from its unique ultrastructure, there are several other exceptional features of myelin. One is certainly its molecular composition. Another is its extraordinary stability. This was compellingly illustrated when 5000-year-old myelin with almost intact ultrastructure was dissected from a Tyrolean Ice Man.

Myelin is a stable system in contrast to most membranes. However, myelin is compartmentalized into structurally and biochemically distinct domains. Noncompacted regions are much more dynamic and metabolically active than tightly compacted regions that lack direct access to the membrane trafficking machinery of oligodendrocytes.

The underlying molecular basis for stability of myelin is likely its lipid composition with high levels of saturated, long chain fatty acids, together with an enrichment of glycosphingolipids (∼20% molar percentage of total lipids) and cholesterol (∼40% of molar percentage of total lipids). In addition, myelin comprises a high proportion of plasmalogens (ether lipids) with saturated long-chain fatty acids. In fact, ∼20% of the fatty acids in myelin have hydrocarbon chains longer than 18 carbon atoms (∼1% in the gray matter) and only ∼6% of the fatty acids are polyunsaturated (∼20% in gray matter).

With maturation of oligodendrocytes, the plasma membrane undergoes major transformations of its structure. Whereas OPCs are covered by a dense layer of large and negatively charged self-repulsive oligosaccharides, compacted myelin of fully matured oligodendrocytes lacks most of these glycoprotein and complex glycolipids.

Schematic depiction of an oligodendrocyte that takes up blood-derived glucose and delivers glycolysis products (pyruvate/lactate) via monocarboxylate transporters (MCT1 and MCT2) to myelinated axons. Oligodendrocytes and myelin membranes are also coupled by gap junctions to astrocytes, and thus indirectly to the blood–brain barrier.

Adaptive myelination refers to dynamic events in oligodendroglia driven by extrinsic factors such as experience or neuronal activity, which subsequently induces changes in circuit structure and function. Understanding how these adaptive changes in neuron-oligodendroglia interactions impact brain function remains a pressing question for the field.

Transient social isolation during adulthood results in chromatin and myelin changes, but does not induce consequent behavioral alterations. When mice undergo a social isolation paradigm during early life development, they similarly exhibit deficits in prefrontal cortex function and myelination, but these deficiencies do not recover with social reintroduction. This implicates a critical period for social deprivation effects on myelin dynamics. Experience-dependent changes in myelin dynamics may depend on not only the age, brain region, and cell type studied, but also the specific myelin structural change assessed.

Local synaptic neurotransmitter release along an axon not only affects the number of OPCs and oligodendrocytes associated with that axon and local synthesis of myelin proteins, but also drives preferential selection of active axons for myelination over the ensheathment of electrically silenced neighboring axons. Neuronal activity–induced plasticity may preferentially impact brain regions that remain incompletely myelinated compared to more fully myelinated tracts.

Whereas the myelin sheath has been regarded for a long time as an inert insulating structure, it has now become clear that myelin is metabolically active with cytoplasmic-rich pathways, myelinic channels, for movement of macromolecules into the periaxonal space. The myelin sheath and its subjacent axon need to be regarded as one functional unit, which are not only morphological but also metabolically coupled.”

https://cshperspectives.cshlp.org/content/early/2024/04/15/cshperspect.a041359 “Oligodendrocytes: Myelination, Plasticity, and Axonal Support” (not freely available) Thanks to Dr. Klaus-Armin Nave for providing a copy.

A 2024 rodent study investigated oligodendrocyte precursor cell transcriptional and epigenetic changes:

“We used single-cell RNA sequencing (scRNA-seq), single-cell ATAC sequencing (scATAC-seq), and single-cell spatial transcriptomics to characterize murine cortical OPCs throughout postnatal life. One group (active, or actOPCs) is metabolically active and enriched in white matter. The second (homeostatic, or hOPCs) is less active, enriched in gray matter, and predicted to derive from actOPCs. Relative to developing OPCs, both actOPCs and hOPCs are less active metabolically and have less open chromatin.

In adulthood, these two groups are transcriptionally but not epigenetically distinct, indicating that they may represent different states of the same OPC population. If that is the case, then one model is that the parenchymal environment maintains adult OPCs within an hOPC state, whereas those OPCs recruited into white matter or exposed to demyelinated axons may transition toward an actOPC state in preparation for making new oligodendrocytes. We do not yet know the functional ramifications of these differences, but this finding has clear implications for the development of therapeutic strategies for adult remyelination.

Another finding is that developing but not adult actOPC chromatin is preferentially open for binding motifs associated with neural stem cells, transit-amplifying precursors, and neurogenesis. Although this may simply reflect their origin as the immediate progeny of neonatal neural precursor cells, it may also explain why developing but not adult OPCs have the capacity to make neurons in culture.

If we could, at least in part, reverse the global chromatin shutdown that occurs between development and adulthood, then perhaps adult OPCs may reacquire the ability to make neurons or become better able to generate new oligodendrocytes for remyelination.”

https://www.cell.com/stem-cell-reports/fulltext/S2213-6711(24)00077-8 “Single-cell approaches define two groups of mammalian oligodendrocyte precursor cells and their evolution over developmental time”

Continued in Part 2.

What can be done today to fulfill early unmet needs?

April 13, 2024April 15, 2024 gettingwell4 Beliefs, Brain development, Epigenetics, Just me, Memory, Primal Therapy, Stress Dr. Arthur Janov, Infants, Unconscious feelings, Unconscious memories

Got agitated earlier this week watching Tucker Carlson’s freely-available interview with a maniac who thinks he’s graduated into a higher state by worshiping the Great AI (Artificial Intelligence, aka Automated Internet, inhabited solely by robots) which will dictate every aspect of what to do with his life. Nevermind that behind the Great AI curtain are the same people who have lied to billions of us, especially during every day of this decade.

Are his current set of beliefs better than previous ones he had of putting a chip into everybody’s brain? What’s wrong with getting to live your own life?

What I saw expressed in the interview was an exhausting pursuit of substitutes for feeling loved. I doubt that many others saw the same, because feeling unloved is so devastating we’ll do anything to avoid it.

But re-experiencing early memories and feelings of unmet needs in a therapeutic setting is the way to keep them from subsequently running our lives. Otherwise, we’ll develop unfulfilling substitutes for what we missed, with misdirected ideas and beliefs accompanied by their unconscious act-outs.

While speaking with a mother who is doing a terrific job of meeting her six-month-old’s needs, I attempted to contrast this interview with the experiences she and her husband are giving their child. Maybe if they read this post, my poor explanation will become clearer.

Wild persimmon trees’ eclipse shadows

Changing a cancerous phenotype

April 9, 2024April 11, 2024 gettingwell4 4-5 stars Advanced knowledge, Acetylcholine, Epigenetics, Glutamate, Immune system, Neurochemicals, Stress Control group, Genetic factors, Neurodegenerative disease

A 2024 Dr. Goodenowe presentation to a professional audience. He ended the presentation by using his 86-year-old father as a case study of treatment to create an inhospitable environment for cancer.

1. Get the body ready

2. Starve the cancer and boost the immune system

3. Characteristics

4. 2019 sample biochemistry

5. 2023 biochemistry (compare HDL (33 vs. 80), see off-the-chart hsCRP, Hcy 16)

6. Treatment details #1

7. Treatment details #2

https://drgoodenowe.com/tfim-2024-recording-now-available/ “Breaking Cancer: The Biochemistry of Cancer Risk Assessment, Prevention, and Treatment—Real Knowledge That You Can Use In Your Practice”

Eat broccoli sprouts to maintain your cells

April 7, 2024April 7, 2024 gettingwell4 4-5 stars Advanced knowledge, Epigenetics, Immune system, Memory, Stress Brain neurons, Control group, Genetic factors, Neurodegenerative disease

Two more papers cited Precondition your defenses with broccoli sprouts, starting with a 2024 review of broccoli compounds’ influences on autophagy and cellular function:

“Promotion of autophagy has been related to lifespan expansion, tumor suppression, and maintenance of metabolic health. Alterations in this pathway have been related to human diseases or pathological states including neurodegenerative diseases, stroke, metabolic alterations, or cancer.

We describe the different types of glucosinolates (GSL), grouped depending on the structure of their side chain, with special attention to those GSL and their derived isothiocyanate (ITC) which have been suggested to be of relevance to treat or prevent human diseases, their structure, and plant source.

It has been shown that SFN activates TFEB, boosting expression of genes required for autophagosome and lysosome biogenesis. SFN induced a short burst of ROS necessary for TFEB activation, and TFEB activity was required for SFN-induced NRF2 activation and protection against acute and chronic oxidative stress.

TFEB was also required for SFN-induced removal of excessive mitochondrial ROS, indicating an important role for mitophagy in SFN-induced antioxidant response. Thus, direct activation of NRF2 by SFN or other ITC can promote autophagy.

Research on autophagy has been characterized by controversies regarding autophagy mediating survival or cell death, or its role in health and disease, not only because autophagy is a complicated process with context dependent roles depending on the cell type or the step of the autophagic pathway being modulated, but also, because in occasions, autophagy is not measured correctly.

An interesting area of research would be to decipher effects of NRF2-regulated or NRF2-independent autophagy induction by ITC, and whether these effects would determine the role of the autophagic process in cellular survival or death. Also, it is needed to clarify which of the effects regulated by ITC are mediated by autophagy, and which ones are not, and the importance of autophagy induction in the therapeutic effects mediated by ITC.”

https://link.springer.com/article/10.1007/s11101-024-09944-w “Glucosinolates, isothiocyanates, and their role in the regulation of autophagy and cellular function” (not freely available)

This paper’s contact coauthor (who provided access to the full paper) is also the contact for Our model clinical trial for Changing to a youthful phenotype with broccoli sprouts.

The coauthors of Exercise substitutes? published a 2024 human cell study:

“While physical activity is an excellent inducer of mitochondrial turnover, its ability to ubiquitously activate and enhance mitochondrial turnover prevents definitive differentiation of the contribution made by each pathway. We employed three agents which are activators of important biological markers involved in antioxidant signaling, mitochondrial autophagy, and mitochondrial biogenesis.

Results suggest that early time points of treatment increase upstream pathway activity, whereas later time points represent increased phenotypic expression of related downstream markers. Findings suggest that spatiotemporal progression of these mechanisms following drug treatment is another important factor to consider when examining subcellular changes towards mitochondrial turnover in muscle.”

https://www.sciencedirect.com/science/article/pii/S2666337624000398 “Sulforaphane, Urolithin A, and ZLN005 induce time-dependent alterations in antioxidant capacity, mitophagy, and mitochondrial biogenesis in muscle cells”

Year Four of Changing to a youthful phenotype with sprouts

March 31, 2024 gettingwell4 4-5 stars Advanced knowledge, Beliefs, Epigenetics, Immune system, Memory, Stress Reciprocity

1. I’ve continued daily practices from Year Three to experience another year without being sick. I’ll get a set of Labcorp tests in two weeks to see if anything is sneaking up on me.

Foods are the same as Week 189 except I eat two raw eggs in the morning after Avena sativa oat sprouts. Supplements are the same except I stopped the ProdromeGlia plasmalogen precursor supplement due to it being out-of-stock.

It’s annoying because after a few days, my sense of smell and taste improvements reverted without ProdromeGlia. I’ve continued ProdromeNeuro, but it seems that its combination with ProdromeGlia was essential for stopping my left ulnar nerve elbow pain, which returned after a week without ProdromeGlia.

2. You may have noticed that earlier this month, a U.S. government agency was forced by a lawsuit to delete their 2021 propaganda pieces against a medication that’s safer than acetaminophen. I had a prescription that local pharmacies suddenly wouldn’t fill in August 2021.

Plenty of workarounds have been available, though. I hadn’t mentioned it before, but a prophylactic weekly intake may have played a part in me not being sick even one day this decade.

Another part was that my living and working in the Washington DC area for 30+ years through 2017 taught me, as an initial response, to not believe a single word of what a government employee said. I’ve since extended that to many other types of compromised people, such as medical professionals.

3. Our ancestors evolved to deal with everyday bacteria, viruses, and other pathogens. Train your immune system every day! disclosed that I was in Milan, Italy on the same February 22-23, 2020 weekend that ten towns were closed south of Milan. I still haven’t experienced any symptoms.

One factor in immune response was that fifteen years previous, I’d taken daily steps with yeast cell wall β-glucan to guard against the phenotypical immune system collapse of old age.
Another factor was that I’d ridden the filthy Washington DC Metro twice a day to-and-from work for years, and had already been exposed to who knows what.

Treat your gut microbiota well. Give them what they want – including cruciferous sprouts – and expect reciprocity.

Sulforaphane vs. ESP enzyme

March 28, 2024 gettingwell4 4-5 stars Advanced knowledge, Stress Control group, Genetic factors

A 2024 study evaluated genetic makeups of 29 broccoli varieties for their sulforaphane-producing capability:

“Sulforaphane (SFN) is one of the most important bioactive compounds in cruciferous vegetables, and is derived from glucosinolates (GSLs [glucoraphanin]). GSLs are hydrolyzed by myrosinases to produce SFN.

However, SFN is not a unique hydrolysate of GSLs. Another enzyme, named epithiospecifier protein (ESP), hydrolyzes GSLs to produce undesirable nitrile components, resulting in a low SFN yield.

Fresh 7-day-old seedlings of 15 broccoli cultivars with a high SFN content did not fully correspond to those with a high GSL content. Seven out of the fifteen broccoli cultivars, such as C2, C8, C12, C21, C22, C28, and C33, produced high SFN, but their GSL content were not particularly remarkable.

Extracted SFN yield from the curds (the curd of broccoli refers to its edible part, which is the entire flower head) was about 70% of that from the seedlings. Nevertheless, in consideration of the obviously higher biomass and lower cost of curds compared to seedlings, these results confirmed that the extraction method established here could also efficiently extract high SFN from broccoli curds and was more feasible for the large-scale extraction of SFN.

Decreased ESP activity can lead to increased SFN formation in broccoli. Broccoli cultivars with strong GSL biosynthetic ability, high myrosinase, and low ESP enzymatic activity are the preferred materials for SFN production.”

https://www.mdpi.com/2218-273X/14/3/352 “Sulforaphane-Enriched Extracts from Broccoli Exhibit Antimicrobial Activity against Plant Pathogens, Promising a Natural Antimicrobial Agent for Crop Protection”

I haven’t seen a broccoli variety suitable for home sprouting advertised for its combined high glucoraphanin biosynthetic ability, high myrosinase enzyme activity, and low epithiospecifier protein enzyme activity genetic profile. Seems like a marketing opportunity. I use a narrow temperature band to suppress ESP activity but not suppress myrosinase activity of 3-day-old sprouts.

A head slam anecdote

March 26, 2024March 27, 2024 gettingwell4 Just me

1. I had some head trauma on Day 146 of an extended 90-day trial of plasmalogen precursor supplements. It happened when ordering dinner for delivery to three people while visiting them a half-dozen states away.

Order status notification was Delivered, but when I went downstairs, I couldn’t find it on either the front or back porches. In the middle of wandering around an unfamiliar house during twilight, I tripped, and head-butted a wall.

2. I’m a little concerned about a 4 cm x 3 cm scalp scrape. Maybe the scar will become a tattoo?

I’m more concerned about the skull / brain impact and cervical disk compression I felt. There have been subsequent symptoms like not understanding simple things my hosts said, and other glitches in me perceiving reality.

Getting medical professionals involved in possible injury treatment won’t happen, though. I lost trust in them because of their actions this decade.

3. Taking daily plasmalogen precursor supplements may have cushioned effects of this head slam. Two days afterwards, though, I ran out of ProdromeGlia, which has been out-of-stock for over a month. Other Prodrome non-proprietary products I don’t use are also out-of-stock. Not a desirable business metric.

There are a hundred ways a small business can screw up customer relationships. It may help for management to emphasize a customer’s value when assessing inventory. Here’s one way to calculate a customer’s monetary value:

Ergothioneine dosing, Part 2

March 17, 2024March 21, 2024 gettingwell4 4-5 stars Advanced knowledge, Dopamine, Epigenetics, Hippocampus, Immune system, Limbic system, Memory, Neurochemicals, Stress, Telomeres Brain neurons, Control group, Genetic factors, Neurodegenerative disease

Continuing Part 1 with a 2024 rodent healthspan and lifespan study:

“We investigated the effects of daily oral supplementation of ergothioneine (ERGO) dissolved in drinking water on lifespan, frailty, and cognitive impairment in male mice from 7 weeks of age to the end of their lives. Ingestion of 4 ~ 5 mg/kg/day of ERGO remarkably extended the lifespan of male mice.

The ERGO group showed significantly lower age-related declines in weight, fat mass, and average and maximum movement velocities at 88 weeks of age. This was compatible with dramatic suppression by ERGO of age-related increments in plasma biomarkers. ERGO also rescued age-related impairments in learning and memory ability.

Ingestion of ERGO may promote longevity and healthy aging in male mice, possibly through multiple biological mechanisms.”

https://link.springer.com/article/10.1007/s11357-024-01111-5 “Ergothioneine promotes longevity and healthy aging in male mice”

Subjects’ plasma ergothioneine levels of an estimated 4 ~ 5 mg/kg daily dose were:

A human equivalent daily dose is an estimated 22 mg to 28 mg (4 or 5 mg x .081 x 70 kg).

The third paper in Part 1 cited a 2017 clinical trial that provided 5 mg and 25 mg ergothioneine doses for 7 days, resulting in these plasma ergothioneine levels:

The first paper of Part 1 referenced a 2020 human study where the dose was 5 mg/day for 12 weeks, but I don’t have access to it. It’s unclear whether humans could continually raise ergothioneine levels by daily consumption throughout our lives as did this rodent study.

A 2024 paper reviewed the importance of ergothioneine to humans:

“We propose that the diet-derived compound ergothioneine (ET) is an important nutrient in the human body, especially for maintenance of normal brain function, and that low body ET levels predispose humans to significantly increased risks of neurodegenerative and possibly other age-related diseases.

Work by multiple groups has established that low ET levels in humans are associated not only with cognitive impairment/AD but also with other age-related conditions, including frailty, Parkinson’s disease, vascular dementia, chronic renal disease, cardiovascular disease, and macular degeneration. Low ET levels also correlate with increased risk of developing preeclampsia in pregnant women [53].

Plasma ET levels from healthy (age-matched) vs unhealthy individuals in Singapore – Mild cognitive impairment (MCI); Alzheimer’s disease (AD); vascular dementia (VaD); Parkinson’s disease (PD); age-related macular degeneration (AMD):

Does low ET cause or contribute to age-related neurodegeneration, or

Does disease cause low ET, or

Low ET and increased disease risk are both caused by something else, as yet unidentified?

Prevention of neurodegeneration is especially important, since by the time dementia is usually diagnosed damage to the brain is extensive and likely irreversible.”

https://www.sciencedirect.com/science/article/pii/S0891584924001357 “Are age-related neurodegenerative diseases caused by a lack of the diet-derived compound ergothioneine?”

Whether or not the healthy individuals ate mushrooms daily in the above graphic was lost while conglomerating multiple studies.

Note that scales of the above two human graphics are a thousand times smaller than the above rodent graphic. I thought that maybe the rodent study made a plasma ergothioneine calculation error, but didn’t see one in the provided Supplementary data.

Reference 53 of the second paper is a 2023 human study:

“We analysed early pregnancy samples from a cohort of 432 first time mothers. Of these 432 women, 97 went on to develop pre-term or term pre-eclampsia (PE).

If a threshold was set at the 90th percentile of the reference range in the control population (≥462 ng/ml), only one of these 97 women (1%) developed PE, versus 96/397 (24.2%) whose ergothioneine level was below this threshold. One possible interpretation of these findings, consistent with previous experiments in a reduced uterine perfusion model in rats, is that ergothioneine may indeed prove protective against PE in humans.”

https://portlandpress.com/bioscirep/article/43/7/BSR20230160/233119/Relationship-between-the-concentration-of “Relationship between the concentration of ergothioneine in plasma and the likelihood of developing pre-eclampsia”

Eyeballing the Healthy individuals in the above graphic, none of those 544 people were below this study’s 462 ng threshold.

A 2023 companion article analyzed the third paper’s unusual findings:

“These results suggest that there might be a dichotomized association between ergothioneine concentrations and preeclampsia; and only a high ergothioneine level over 90th percentile of the control population could be protective against preeclampsia.

Univariable results showed that ergothioneine had a significant non-linear association with preeclampsia and it would start to offer protective effect from 300 ng/ml onward. Analysis also confirmed that body mass index was significantly associated with an increased risk of preeclampsia.

A large observational study could strengthen the causal association between ergothioneine and preeclampsia. If confirmed, a randomized controlled trial (RCT) assessing whether ergothioneine supplementation can reduce risk of preeclampsia will be imminently feasible. Ideally, such RCT should compare placebo with a range of different doses of ergothioneine to identify the best or minimal effective dose, given its good safety records, including in pregnancy, with a no-observed-adverse-effect level (NOAEL) of 800 mg/kg body weight per day.”

https://portlandpress.com/bioscirep/article/43/8/BSR20231076/233395/Dose-related-relationship-between-ergothioneine “Dose-related relationship between ergothioneine concentrations and risk of preeclampsia”

My daily mushroom ergothioneine dose is around 7 mg, and I weigh about 70 kg. I don’t think a daily 800 mg/kg ergothioneine dose would be desirable for anybody, regardless of what experts say.

How many times have public health employees been wrong this decade? Would you bet your or your child’s health on their advice?

Eat broccoli sprouts for your bladder?

February 29, 2024February 29, 2024 gettingwell4 2-3 stars Required further work Control group

A 2024 clinical trial investigated effects of people adding a cup of cruciferous vegetables to their daily diet for six months:

“We developed a 6-month behavioral dietary intervention (Power to Redefine Your Health [POW-R Health]) designed to increase Cruciferae intake and isothiocyanate (ITC) levels in non–muscle-invasive bladder cancer (NMIBC) survivors, with the long-term goal of reducing bladder cancer recurrence, progression, and mortality.

Orally ingested ITCs are rapidly and almost exclusively delivered to the bladder and concentrated in the urine, showing 2 to 3 orders of magnitude higher concentration of ITCs and metabolites in the urine than in the plasma within 3 hours of dosing. Storage of urine in the bladder further enhances exposure of malignant cells to ITCs.

We estimated dietary ITC intake and measured urinary ITC levels. With the exception of urinary ITC levels in µM, the treatment arm had a significantly higher increase in levels in all variables compared with the control arm from baseline to 6-month follow-up.

Our POW-R Health intervention increased Cruciferae intake by 0.94 cups/day and urinary ITC levels by 11.1 μmol/g creatinine compared with the control arm, with an average increase of urinary concentration of 10.4 μM, the desirable dose level of urinary ITCs needed to stop or kill at least 50% of bladder cancer cells in in vitro models. To our knowledge, this is the only study that showed an intervention’s success in significantly and meaningfully increasing both Cruciferae intake and urinary ITC levels among NMIBC survivors.

Our simple dietary intervention only requires NMIBC survivors to consume 1 cup of Cruciferae a day, is of low cost to participants (cost of Cruciferae), and is easily accessible (available at grocery stores). If a future RCT demonstrates that the intervention significantly reduces bladder cancer recurrence and progression, it would be an easily scalable strategy to prevent NMIBC recurrence and progression, which occurs within 5 years in most NMIBC survivors.”

https://jnccn.org/view/journals/jnccn/aop/article-10.6004-jnccn.2023.7086/article-10.6004-jnccn.2023.7086.xml “Outcomes of a Dietary Intervention to Reduce Bladder Cancer Recurrence and Progression in Survivors of Non–Muscle-Invasive Bladder Cancer”

These researchers took a result of “an average increase of urinary concentration of 10.4 μM” and touted it as evidence of the intervention’s success. The first paragraph of clinical trial NCT04548193’s primary objective was:

“Develop an evidence-based behavioral intervention to increase cruciferous vegetable intake, with the goal of attaining desirable urinary isothiocyanates (ITC) levels effective for anti-cancer activities.”

No mention in this study’s Discussion section of why 10.4 ± 22.5 µM was so wildly variable. After all, nobody’s measurements of excreted ITCs (aka bioavailability) were below zero as the standard deviation implies (10.4 – 22.5 µM ?).

How much did “estimated dietary ITC intake” contribute to variability in this trial’s measurement goal? Reference 26 “Total isothiocyanate yield from raw cruciferous vegetables commonly consumed in the United States” shared a few coauthors with this study, and had items such as:

“We observed up to 345-fold difference in isothiocyanate yield among nine samples of mustard green (ranging from 0.4 to 137.9 μmol/100g wet weight).”

Reference 25 “Effects of cooking methods on total isothiocyanate yield from cruciferous vegetables” also shared a few coauthors with this study, and had items such as:

“The efficiency and amount of ITCs generated by gastrointestinal microflora could be relatively low and vary substantially by individuals.”

But differences in cooking methods and raw cruciferous vegetables weren’t the only explanations for this primary outcome’s wild variability. These researchers knew or should have known about the 2016 https://onlinelibrary.wiley.com/doi/abs/10.1002/mnfr.201600766 “Stabilized Sulforaphane for Clinical Use: Phytochemical Delivery Efficiency” (not freely available).

Per that study of 10 healthy people’s metabolisms after ingesting a 200 μmol isothiocyanate sulforaphane amount (35 mg), urinary % of dose amount excreted ranged from 19.5% to 86.9%. Statistics wouldn’t add any plausible explanations of why there were >four times individual differences in ITC bioavailability.

So we’ll have to wait for follow-on studies.

Kingfisher

Sulforaphane’s effects on autism and liver disease

February 15, 2024 gettingwell4 4-5 stars Advanced knowledge, Brain development, Epigenetics, Glutamate, Immune system, Neurochemicals, Stress Control group, Embryo development

Here are two more papers that cited Precondition your defenses with broccoli sprouts, starting with a 2024 human / rodent study investigating gut microbiota / sulforaphane’s effects on autism:

“Sulforaphane (SFN) has been found to alleviate complications linked with several diseases by regulating gut microbiota (GM), while the effect of GM on SFN for autism spectrum disorders (ASD) has not been studied. We evaluated therapeutic effects of SFN on maternal immune activation (MIA)-induced ASD-like rat model and pediatric autism patients aged 4–7 years.

OSU-SO for social interactive OSU behavioral subscores, OSU-CO for non-verbal communicative OSU behavioral [significant] subscores, and OSU-ST for repetitive or ritualistic OSU behavioral subscores:

Although gut microbiota composition was significantly altered in SFN-treated ASD-like rats, alteration of GM was not evident in ASD patients after 12 weeks of SFN treatment. Limitations in this study:

Studies were conducted in male rats and boys only;

The sample size of our clinical study is relatively small [6 SFN-treated boys] and needs to be further expanded in the future; and

This study only uncovered a potential link between gut flora and the therapeutic effects of SFN on ASD.

SFN treatment alleviates social deficits in MIA-induced ASD-like rats and ASD patients, and improvements might be associated with gut microbiota.”

https://www.frontiersin.org/articles/10.3389/fnut.2023.1294057/full “Therapeutic efficacy of sulforaphane in autism spectrum disorders and its association with gut microbiota: animal model and human longitudinal studies”

The 2022 Efficacy of Sulforaphane in Treatment of Children with Autism Spectrum Disorder: A Randomized Double-Blind Placebo-Controlled Multi-center Trial (not freely available) was referenced for sulforaphane (actually, glucoraphanin with myrosinase enzyme) doses:

“Dosing was weight-based:

Two tablets/day for 10–29 lb;

Three tablets/day for 30–49 lb;

Four tablets/day for 50–69 lb.

An estimated delivery of approximately 24, 36, and 48 μmol of sulforaphane daily was expected in the respective SF dosage groups.”

Weights of the above μmol estimated dose amounts per https://pubchem.ncbi.nlm.nih.gov/compound/sulforaphane are 4.3, 6.4, and 8.5 mg, respectively. An average weight of a 4-year-old boy is 36 lbs / 16.3 kg, and a 7-year-old boy is 51.1 lbs / 23.2 kg.

This study’s maternal immune activation was done by injecting lipopolysaccharide into pregnant rats. Would injecting pregnant women with immune-activating substances have similar harmful effects on the fetus? We don’t have evidence because unbiased and unconflicted studies looking for such effects weren’t sponsored and/or published before immune-activating substances’ deployments.

A 2024 rodent study investigated sulforaphane’s effects on diabetic liver damage:

“We investigated whether sulforaphane, an Nrf2 activator and antioxidant, prevents diabetes-induced hepatic ferroptosis, and the mechanisms involved. Results showed that diabetes-induced inactivation of Nrf2 and decreased expression of its downstream antiferroptotic molecules critical for:

Antioxidative defense (catalase, superoxide dismutases, thioredoxin reductase);

Iron metabolism (ferritin heavy chain (FTH1), ferroportin 1);

Glutathione (GSH) synthesis (cystine-glutamate antiporter system, cystathionase, glutamate-cysteine ligase catalitic subunit, glutamate-cysteine ligase modifier subunit, glutathione synthetase); and

GSH recycling – glutathione reductase (GR)

were reversed/increased by sulforaphane treatment.

Diabetes-induced increases in serum glucose and triglyceride levels were also significantly reduced by sulforaphane. Taken together, our results demonstrate a potent effect of SFN in inhibiting ferroptotic death of hepatocytes under diabetic conditions in vivo, thereby alleviating liver injury.

This is the first study to demonstrate the protective role of SFN against ferroptosis in the liver of diabetic mice. This nominates sulforaphane as a promising phytopharmaceutical for the prevention/alleviation of ferroptosis in diabetes-related pathologies.”

https://iubmb.onlinelibrary.wiley.com/doi/10.1002/biof.2042 “Sulforaphane prevents diabetes-induced hepatic ferroptosis by activating Nrf2 signaling axis”

Herding humans

February 6, 2024February 7, 2024 gettingwell4 4-5 stars Advanced knowledge, Beliefs, Memory Control group, Reciprocity

Three recent papers cited a 2009 Herding in humans paper, starting with a 2024 modeling study by one of its coauthors showing that people have trouble purposefully acting randomly:

“In many tasks, human behavior is far noisier than is optimal. Yet when asked to behave randomly, people are typically too predictable.

Randomness is produced by inhibition of habitual behavior, striving for unpredictability. We verify these predictions in two experiments: people show the same deviations from randomness when randomly generating from non-uniform or recently-learned distributions.

While local sampling has previously explained why people are unpredictable in standard cognitive tasks, here it also explains why human random sequences are not unpredictable enough.”

https://journals.plos.org/ploscompbiol/article?id=10.1371/journal.pcbi.1011739 “Explaining the flaws in human random generation as local sampling with momentum”

A 2023 study tested extents to which people could be influenced to change their food preferences:

“We examined the effect of a descriptive norm on the choice between two similar products (vegetables or fruits). Participants were exposed to a norm promoting vegetables, fruits, or no norm.

A descriptive norm signaling that a greater proportion of previous participants had chosen a vegetable over a generally preferred fruit basket tripled the odds of participants choosing vegetables. These findings support the concept that descriptive norms act as heuristics that influence behavior in a relatively automatic manner.

The norm may have acted as a social proof heuristic to which participants conformed with little deliberation. Given that they were asked to add their name to a list of previous participants’ names and choices, they may have inferred that their choice would be visible to participants after them.

We found no to small effects of norms on intentions to consume fruits and vegetables or on taste expectations and experiences in a taste test, suggesting that these may not be key in explaining how descriptive norms lead to behavior change. Although the fruit norm did not affect choice, it did reduce negative fruit taste experiences compared to the no norm group.”

https://www.tandfonline.com/doi/full/10.1080/15534510.2023.2261178 “I’ll have what they’re having: a descriptive social norm increases choice for vegetables in students”

I selected this 2023 modeling study from many other modeling studies because it provided details about what researchers consider herding’s underlying premises to be:

“Herding does not come about because a central actor tells the agents to herd, but rather it is an emergent phenomenon of many local decisions, wherein the beliefs and thoughts of individuals become aligned. Herding is a form of social contagion, where one individual adopts the views of another, primarily because it increases their confidence in a decision they were making.

Herding is related to conformity, an important behavior in humans’ social learning, being a tendency to act as the majority of the individuals do. Conformity is defined as choosing the most frequent strategy observed by the player, instead of being guided by maximizing their personal payoffs.

The cost of herding occurs when someone decides to make the opposite decision of the rest of the herd. It is important to realize that these costs are only incurred if the actor has adopted a herd mentality. If they do not care about the herd, they do not suffer social costs.

In cases where everyone is herding, cooperation will prevail. Having a herding mentality has a positive overall effect, and can explain why cooperation prevails even without altruism, kin selection, tags, and reciprocity.”

https://www.cell.com/iscience/fulltext/S2589-0042(23)02004-7 “The evolution and social cost of herding mentality promote cooperation”

I’d guess that these coauthors never told their children that wrong is wrong even when everyone else is doing it.

It made me laugh that both the 2009 paper and this paper defined herding as solely happening on its own without any herders’ involvement. I have no doubts that researchers are not allowed to investigate and/or publish factual evidence on more advanced techniques of herding humans, especially those that have been widely used during this decade.

Our grandchildren’s grandchildren

February 3, 2024February 3, 2024 gettingwell4 Just me

Starting this blog’s tenth year with admitting to a National Geographic Alaska show compulsion. There’s something fascinating about seeing a subsistence lifestyle that I’d never choose.

1. A recent Life Below Zero: First Alaskans episode “Rite of Spring” included a visit to remains of a childhood home that had been swept away in a 2009 Yukon River flood. Some of the dialog:

“He put in his will that this land wasn’t ever to be sold or divided. It was for his grandchildren’s grandchildren.”

Nice thought. It’d be better, though, if a person would be around to see that generation of their descendants. Which is impossible when someone risks their survival day after day.

2. A Life Below Zero: Next Generation episode “Uneven Ground” showed a couple and their child repairing an access road, to include clearing trash from their property that’s on a former military installation. I’d guess that there’s a zero percent probability that they weren’t also exposed to leftover environmental toxins in their property’s soil and water.

3. Speaking of which, the park I played in as often as possible until age twelve was mentioned in two articles published decades afterwards:

“They’ll have to deal with toxic waste from incinerator ash dumped on the land as fill that’s buried up to four feet deep. Redevelopment of a water park at the adjacent Grapeland Heights Park required removal of 80,000 tons of soil at a cost of $10 million. Soil tests conducted by DERM in 2006 showed elevated levels of several contaminants, including barium, copper, and dioxins.”

The Melreese Toxic Gamble

“Toxic trouble at the Melreese site was also well-known. The city got an expensive lesson in the problem in 2005, when buried ash with dangerous levels of arsenic, lead, and other contaminants were found at Grapeland Heights Park, the popular park with ball fields adjacent to Melreese.”

Toxic soil under golf course is a legacy of Miami’s dirty past. There’s a lot more out there

I haven’t had toxicity tests after learning about this a few years ago. Too easy to get thoughts, feelings, and behavior trapped in What was not, is not, and will never be.

4. My oldest grandchild and I had a conversation about their environmental angst, which apparently was due to just reading about pollution. I didn’t say much, or sugarcoat anything, or otherwise dismiss concerns.

I think my teenaged grandchildren will be alright, but it’s also up to each of them and their own actions. Too early to expect to see their grandchildren.

I get pollution and death reminders on every beach walk from brown foam and washed up debris of formerly living things. Focusing on those aspects would take away from a beach walk’s other experiences.

Improving peroxisomal function

January 30, 2024January 30, 2024 gettingwell4 4-5 stars Advanced knowledge, Brain development, Brainstem, Cerebellum, Cerebrum, Epigenetics, Immune system, Lower brain, Memory, Stress Control group, Embryo development, Genetic factors, Neural plasticity, Neurodegenerative disease

A 2024 review provided details about “mysteries” in peroxisome research:

“Peroxisomes are key metabolic organelles with essential functions in cellular lipid metabolism (e.g., β-oxidation of fatty acids and synthesis of ether phospholipids, which contribute to myelin sheath formation), and metabolism of reactive oxygen species (ROS), particularly hydrogen peroxide. Loss of peroxisomal function causes severe metabolic disorders in humans.

Additional non-metabolic roles of peroxisomes have been revealed in cellular stress responses, regulation of cellular redox balance and healthy ageing, pathogen and antiviral defence, and as cellular signalling platforms. New findings also point to a role in regulation of immune responses.

In our previous reviews, we addressed the role of peroxisomes in the brain, in neurological disorders, in development of cancer, and in antiviral defence. To avoid repetition, we refer to those articles where appropriate, and to more specialised recent reviews on peroxisome biology.

Proper functioning of peroxisomes in metabolism requires the concerted interaction with other subcellular organelles, including the endoplasmic reticulum (ER), mitochondria, lipid droplets, lysosomes, and the cytosol. A striking example of peroxisome-ER metabolic cooperation is de novo biosynthesis of ether phospholipids.

Metabolic activities of peroxisomes, such as ɑ- and β-oxidation of fatty acids, plasmalogen synthesis, and ROS/reactive nitrogen species metabolism, have been linked to numerous immune-related pathways. Roles for peroxisomes in immune and defence mechanisms have opened a new field of peroxisome research, and highlight once more how important peroxisomes are for human health and disease.

It is still not fully understood how peroxisomal functions and abundance are regulated, what kinases/phosphatases are involved, or how peroxisomes are linked to cellular signalling pathways and how they act as signalling platforms.”

https://link.springer.com/article/10.1007/s00418-023-02259-5 “The peroxisome: an update on mysteries 3.0”

Last Friday was Day 90 of a 90-day trial of plasmalogens coincident with improving peroxisomal function via resistance exercise and time-restricted eating. A sticking point has been leg resistance exercises. Ankle issues are interfering with progress, although beach walks aren’t similarly affected. I’m almost back to an upper body exercise routine of five years ago, and I’ve added a half-dozen abs exercises.

I’ll continue taking the two Prodrome plasmalogen precursor supplements (ProdromeGlia and ProdromeNeuro) and with efforts to improve peroxisomal function. Since achieving effective resistance exercise levels is taking longer than expected, and my crystal ball is out-of-commission, I don’t have a realistic end time estimate for stopping the supplements.

Get a little stress into your life

January 27, 2024January 28, 2024 gettingwell4 4-5 stars Advanced knowledge, Epigenetics, Immune system, Stress Brain neurons, Control group, Genetic factors, Neurodegenerative disease

Two reviews on beneficial effects of mild stress, starting with a 2024 paper coauthored by the lead researcher of Sulforaphane in the Goldilocks zone:

“This paper addresses how long lifespan can be extended via multiple interventions, such as dietary supplements, pharmaceutical agents, caloric restriction, intermittent fasting, exercise, and other activities. This evaluation was framed within the context of hormesis, a biphasic dose response with specific quantitative features describing the limits of biological/phenotypic plasticity for integrative biological endpoints.

Human maximum longevity has remained relatively constant in the 110–120 year time period. Yet, research with C. elegans indicates that hormetic processes increase both average (median/mean) and maximum lifespans. These observations were consistently shown by different research teams using highly diverse stressors but with generally similar experimental methods. Thus, lifespan can be increased in an overall average manner but also within the context of the maximum lifespan potential via hormetic processes, which has not been shown to occur in human population studies.

In multiple experimental and epidemiological contexts, antioxidants have prevented lifespan extension of numerous hormetic agents and blocked human health benefits (e.g., exercise), supporting the hypothesis that oxidative stress is necessary for healthspan improvements and lifespan extension.

Maximum lifespan may be prolonged by extending the lifespan of healthy subjects. Median lifespan would be enhanced by protecting those who are susceptible to genetic/environmental diseases.

Most experimental studies indicate that maximum hormetic lifespan benefits are in the 15 – 25% range when responses are optimized. Human-based benefits could be expected to be less than this maximum range. The issue of hormetic synergies is important to consider, but the available data to date indicates that these benefits are also constrained by limits of biological plasticity.”

https://www.sciencedirect.com/science/article/abs/pii/S1568163723003409 “Hormesis determines lifespan” (not freely available) Thanks to Dr. Evgenios Agathokleous for providing a copy.

A 2023 review of nematode studies was cited three times:

“While stress response pathways are important in allowing organisms to survive acute and chronic stresses, these pathways also contribute to longevity under unstressed conditions. Multiple stress response pathways are required for normal lifespan in wild-type worms, and all of the stress response pathways discussed in this review contribute to the longevity of long-lived mutants.

Four stress response pathways were consistently required for longevity:

The FOXO transcription factor DAF-16-mediated stress response;

The Nrf2 homolog SKN-1-mediated oxidative stress response;

The cytoplasmic unfolded protein response (cyto-UPR); and

The endoplasmic reticulum unfolded protein response (ER-UPR)

are required for normal lifespan, and may contribute to the extended lifespan of long-lived mutants. Developing strategies to activate these pathways, at the right time(s) and in the right tissue(s), may help to promote healthy aging and ameliorate age-onset disease.”

https://www.sciencedirect.com/science/article/pii/S1568163723001009 “Biological resilience and aging: Activation of stress response pathways contributes to lifespan extension”