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Fight Aging! Newsletter, September 14th 2020
This study is the first to provide a direct link between this inflammation and plaque development - by way of IFITM3.
Scientists know that the production of IFITM3 starts in response to activation of the immune system by invading viruses and bacteria. These observations, combined with the new findings that IFITM3 directly contributes to plaque formation, suggest that viral and bacterial infections could increase the risk of Alzheimer's disease development. Indeed, researchers found that the level of IFITM3 in human brain samples correlated with levels of certain viral infections as well as with gamma-secretase activ...
Source: Fight Aging! - September 13, 2020 Category: Research Authors: Reason Tags: Newsletters Source Type: blogs
Targeting Cellular Senescence to Heal Non-Healing Wounds
An accumulation of senescent cells takes place throughout the body with age. Cells become senescent constantly, the vast majority as a consequence of hitting the Hayflick limit on replication of somatic cells. In youth, these cells are efficiently removed, either via programmed cell death, or destroyed by the immune system. In later life, removal processes slow down, while the damaged state of tissue provokes ever more cells into becoming senescent. In older people, this imbalance leads to a state in which a few percent of all cells in tissues are senescent at any given time. This is, unfortunately, more than enough to pro...
Source: Fight Aging! - September 10, 2020 Category: Research Authors: Reason Tags: Medicine, Biotech, Research Source Type: blogs
A Damage-Based View of Aging, Offering the Hope of Rejuvenation through Repair
This paper, published earlier in the year, is a reaffirmation of the consensus position that aging is caused by the accumulation of cell and tissue damage, made at a time in which programmed aging theories are becoming more popular. Initiatives such as those of Turn.bio and other groups, in which cells are at least partially reprogrammed towards a pluripotent state in living animals, have spurred greater interest in the characteristic epigenetic changes that take place with aging. That reversing those epigenetic changes produces rejuvenation by many measures is interesting and promising, but it isn't clear that it can be t...
Source: Fight Aging! - September 10, 2020 Category: Research Authors: Reason Tags: Daily News Source Type: blogs
Fight Aging! Newsletter, September 7th 2020
In conclusion, using a large cohort with rich health and DNA methylation data, we provide the first comparison of six major epigenetic measures of biological ageing with respect to their associations with leading causes of mortality and disease burden. DNAm GrimAge outperformed the other measures in its associations with disease data and associated clinical traits. This may suggest that predicting mortality, rather than age or homeostatic characteristics, may be more informative for common disease prediction. Thus, proteomic-based methods (as utilised by DNAm GrimAge) using large, physiologically diverse protein sets for p...
Source: Fight Aging! - September 6, 2020 Category: Research Authors: Reason Tags: Newsletters Source Type: blogs
A Bidirectional Relationship Between the Gut Microbiome and Aging
The gut microbiome is influential on health over the long term, possible as much so as exercise. That said, research related to aging in this part of the field is comparatively recent, and consequently is far less developed than the long-standing evidence for the effects of exercise on mortality and risk of age-related disease. It seems fairly clear that the gut microbiome changes in characteristic ways with age, becoming less helpful and more harmful. Species that produce beneficial metabolites decline in number and activity, while inflammatory microbial populations grow in size, contributing the state of chronic inflamma...
Source: Fight Aging! - September 2, 2020 Category: Research Authors: Reason Tags: Medicine, Biotech, Research Source Type: blogs
Fight Aging! Newsletter, August 31st 2020
Fight Aging! publishes news and commentary relevant to the goal of ending all age-related disease, to be achieved by bringing the mechanisms of aging under the control of modern medicine. This weekly newsletter is sent to thousands of interested subscribers. To subscribe or unsubscribe from the newsletter,
please visit:
https://www.fightaging.org/newsletter/
Longevity Industry Consulting Services
Reason, the founder of Fight Aging! and Repair Biotechnologies, offers strategic consulting services to investors, entrepreneurs, and others interested in the longevity industry and its complexities. To find out m...
Source: Fight Aging! - August 30, 2020 Category: Research Authors: Reason Tags: Newsletters Source Type: blogs
Fight Aging! Newsletter, August 24th 2020
We report that electrical stimulation (ES) stimulation of post-stroke aged rats led to an improved functional recovery of spatial long-term memory (T-maze), but not on the rotating pole or the inclined plane, both tests requiring complex sensorimotor skills. Surprisingly, ES had a detrimental effect on the asymmetric sensorimotor deficit.
Histologically, there was a robust increase in the number of doublecortin-positive cells in the dentate gyrus and SVZ of the infarcted hemisphere and the presence of a considerable number of neurons expressing tubulin beta III in the infarcted area. Among the genes that were unique...
Source: Fight Aging! - August 23, 2020 Category: Research Authors: Reason Tags: Newsletters Source Type: blogs
The Public Cannot Distinguish Between Scientific versus Unscientific, Likely Good versus Likely Bad Approaches to Longevity
One of the challenges inherent in patient advocacy for greater human longevity, for more research into aging and rejuvenation, is that journalists and the public at large either cannot or will not put in the effort needed to distinguish between: (a) scientific, plausible, and likely useful projects, those with a good expectation of addressing aging to a meaningful degree; (b) scientific, plausible, and likely unhelpful projects, those that will do little to move the needle on life expectancy, and (c) products and programs that consist of marketing, lies, and little else. This last category is depressingly large, and the fi...
Source: Fight Aging! - August 20, 2020 Category: Research Authors: Reason Tags: Medicine, Biotech, Research Source Type: blogs
Immune System Aging as an Important Contributing Factor in the Progression of Many Age-Related Diseases
The immune system influences the function of tissues throughout the body. Immune cells are involved in tissue maintenance and wound healing, in the necessary day to day clearance of senescent cells, in the removal of cell debris and molecular waste. In some organs they have even more vital functions, such as assisting in the maintenance of synaptic connections in the brain. Further, immune cells produce inflammatory and anti-inflammatory signals that influence the behavior of other cells in numerous ways. Thus when the immune system runs awry and falters with age, the downstream consequences are pervasive and consequential...
Source: Fight Aging! - August 19, 2020 Category: Research Authors: Reason Tags: Medicine, Biotech, Research Source Type: blogs
Towards Better Vaccines and a Lower Burden of Infectious Disease in Old People
Over a lifetime, the burden of infectious disease - and particularly persistent infections such as cytomegalovirus - influences the pace of aging via its detrimental impact on immune function in later life. The slow upward trend in life expectancy over the past two centuries is due in no small part to reductions in infectious disease that accompanied improvements in sanitation and then medicine. In addition, in old age, once the immune system declines into ineffectieness, infectious disease becomes a much more serious concern. Infections that a young person defeats with ease become life-threatening. The primary strategy to...
Source: Fight Aging! - August 17, 2020 Category: Research Authors: Reason Tags: Medicine, Biotech, Research Source Type: blogs
Fight Aging! Newsletter, August 17th 2020
In this study, we sought to elucidate the role of VRK-1 in regulation of adult life span in C. elegans. We found that overexpression of VRK-1::GFP (green fluorescent protein), which was detected in the nuclei of cells in multiple somatic tissues, including the intestine, increased life span. Conversely, genetic inhibition of vrk-1 decreased life span. We further showed that vrk-1 was essential for the increased life span of mitochondrial respiratory mutants. We demonstrated that VRK-1 was responsible for increasing the level of active and phosphorylated form of AMPK, thus promoting longevity.
A Fisetin Variant, C...
Source: Fight Aging! - August 16, 2020 Category: Research Authors: Reason Tags: Newsletters Source Type: blogs
Reviewing Associations Between Physical Activity and Loss of Average Telomere Length with Age
Telomeres are repeated DNA sequences at the ends of chromosomes. With each cell division a little telomere length is lost, and this is an important part of the countdown mechanism that limits replication of somatic cells. Somatic cells with short telomeres become senescent or self-destruct. Stem cells, on the other hand, use telomerase to lengthen their telomeres, and thus produce daughter somatic cells with long telomeres throughout a lifetime. This two-tier system of privileged stem cells and limited somatic cells, present in near all animals, keeps the risk of cancer low enough for evolutionary success, while still allo...
Source: Fight Aging! - August 13, 2020 Category: Research Authors: Reason Tags: Medicine, Biotech, Research Source Type: blogs
Telomerase Gene Therapy May Treat Fibrosis via a Reduced Burden of Cellular Senescence
A number of research groups are quite enthusiastic about the prospects for telomerase gene therapy as a treatment for aging and numerous age-related diseases. This is based on more than a decade of work in mice, showing extended life spans and improved metabolism. Over the past few years, reversal of fibrosis via telomerase gene therapy has been demonstrated in mice. The evidence for this to be an approach worth bringing to the clinic continues to accumulate. Fibrosis is a disruption of tissue maintenance, associated with chronic inflammation, in which an inappropriate deposition of scar-like collagen takes place, degradin...
Source: Fight Aging! - August 11, 2020 Category: Research Authors: Reason Tags: Medicine, Biotech, Research Source Type: blogs
Fight Aging! Newsletter, August 10th 2020
This study aimed to characterize the role of BDNF in age-related microglial activation. Initially, we found that degrees of microglial activation were especially evident in the substantia nigra (SN) across different brain regions of aged mice. The levels of BDNF and TrkB in microglia decreased with age and negatively correlated with their activation statuses in mice during aging. Interestingly, aging-related microglial activation could be reversed by chronic, subcutaneous perfusion of BDNF. Peripheral lipopolysaccharide (LPS) injection-induced microglial activation could be reduced by local supplement of BDNF, while shTrkB...
Source: Fight Aging! - August 9, 2020 Category: Research Authors: Reason Tags: Newsletters Source Type: blogs
How Calorie Restriction Improves Intestinal Stem Cell Function
The practice of calorie restriction, eating up to 40% fewer calories while still maintaining an optimal intake of micronutrients, is well demonstrated to slow aging and extend healthy life span in near all species and lineages tested to date. It produces sweeping effects on the operation of metabolism - near everything changes, which has made it something of a challenge to identify the principal points of action. Nonetheless, more efficient operation of the cellular housekeeping mechanisms of autophagy is the most plausible mechanism to account for the majority of the benefits. That calorie restriction fails to extend life...
Source: Fight Aging! - August 3, 2020 Category: Research Authors: Reason Tags: Medicine, Biotech, Research Source Type: blogs
