Fight Aging! Newsletter, January 16th 2023
Conclusions
Implanted Hair Follicle Cells Produce Remodeling of Scar Tissue
Assessment of Somatic Mosaicism as a Biomarker of Aging
The Gut Microbiome of Centenarians
https://www.fightaging.org/archives/2023/01/the-gut-microbiome-of-centenarians/
The state of the gut microbiome is arguably as influential on health as exercise. Various microbial species present in the gut produce beneficial metabolites, such as butyrate, or harmful metabolites, such as isoamylamine, or can provoke chronic inflammation in a variety of ways. An individual can have a better or worse microbiome, assessing these and other...
Source: Fight Aging! - January 15, 2023 Category: Research Authors: Reason Tags: Newsletters Source Type: blogs
A Proposal to Accelerate Progress Towards Human Rejuvenation
Here find the first draft of a proposal regarding the best way forward at the present time to accelerate progress towards the development of diverse, effective rejuvenation therapies. The key is to use philanthropic funding to (a) prove efficacy in low-cost clinical trials, and then (b) market that data to ensure physician adoption of the first working rejuvenation therapies. A PDF version of this draft also exists.
Executive Summary
1. Aging is by far the greatest cause of human morbidity and mortality.
2. Rejuvenation therapies that will greatly reduce unnecessary late life suffering and death ar...
Source: Fight Aging! - January 13, 2023 Category: Research Authors: Reason Tags: Activism, Advocacy and Education Source Type: blogs
Fight Aging! Newsletter, January 9th 2023
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! - January 8, 2023 Category: Research Authors: Reason Tags: Newsletters Source Type: blogs
Extracellular Mitochondria Have Some Ability to Selectively Target Tissues Experiencing Mitochondrial Dysfunction
Mitochondria can be ejected and taken up by cells, or transferred via connections between cells, and this appears to one of the many ways in which cells communicate or attempt to assist in cases of damage. It is of great interest to the research community that intracellular mitochondria can be taken up and used by cells, given the existence of inherited diseases resulting from mitochondrial mutations, and given the late life decline in mitochondrial function that contributes to many age-related conditions. It may be possible to deliver fully functional mitochondria as a therapy, to be ingested by cells in order to repair t...
Source: Fight Aging! - January 4, 2023 Category: Research Authors: Reason Tags: Medicine, Biotech, Research Source Type: blogs
Discussing the Target Cells for Allotopic Expression of Mitochondrial DNA
The Strategies for Engineered Negligible Senescence (SENS) view of the relevance of mitochondrial DNA damage to aging is that certain types of damage, large deletions for example, can produce pathological mitochondria that are both broken and able to outcompete their peers. Clones of the original damaged mitochondrion take over a cell, turning it into an exporter of large amounts of damaging reactive molecules. Only a small number of cells are affected by this type of damage in aged tissues, but it doesn't take that many cells acting in this way to produce pervasive changes to the signaling environment, as well as signific...
Source: Fight Aging! - January 3, 2023 Category: Research Authors: Reason Tags: Medicine, Biotech, Research Source Type: blogs
Fight Aging! Newsletter, January 2nd 2023
In conclusion, circulating monocytes in older adults exhibit increased expression of activation, adhesion, and migration markers, but decreased expression of co-inhibitory molecules.
MERTK Inhibition Increases Bone Density via Increased Osteoblast Activity
https://www.fightaging.org/archives/2022/12/mertk-inhibition-increases-bone-density-via-increased-osteoblast-activity/
Bone density results from the balance of constant activity on the part of osteoblasts and osteoclasts, the former building bone, the latter breaking it down. With advancing age, the balance of activity shifts to favor osteoclasts, pro...
Source: Fight Aging! - January 1, 2023 Category: Research Authors: Reason Tags: Newsletters Source Type: blogs
A Look Back at 2022: Progress Towards the Treatment of Aging as a Medical Condition
At the end of 2022, we can reflect on the fact that we are steadily entering a new era of medicine, one in which mechanisms of aging are targeted rather than ignored. It is a profound change, one that will change the shape of a human life and ultimately the human condition by eliminating the greatest sources of suffering and death in the world. Year after year, we see increased funding, ongoing progress towards therapies capable of slowing aging or reversing aspects of aging, and a growing taxonomy of such potential therapies and their target mechanisms.
The view of aging in the medical community and public at large...
Source: Fight Aging! - December 30, 2022 Category: Research Authors: Reason Tags: Of Interest Source Type: blogs
Angiotensin II Increases Oxidative Stress in Aging
Researchers here suggest that angiotensin II expression is maladaptive in the context of aging, provoking greater oxidative stress and harmful downstream consequences for cell and tissue function. If looking to produce therapies based on interfering in angiotensin II receptor signaling, an approach already well established in the treatment of hypertension, the question is always the tradeoff between loss of function and avoidance of damage. Few if any molecular interactions in the body are entirely dispensable, and angiotensin II signaling is involved in a range of normal cellular processes. That said, this topic is well e...
Source: Fight Aging! - December 28, 2022 Category: Research Authors: Reason Tags: Daily News Source Type: blogs
Fight Aging! Newsletter, December 26th 2022
This article on senolytic therapies to selectively remove senescent cells in old tissues is in part a matter of Unity Biotechnology talking up their position. The company suffered from first mover disadvantage in bringing senolytic drugs into clinical development. The field has made progress very rapidly over the last decade, and startups founded even just a couple of years after Unity's launch benefited from greater knowledge and a selection of better technologies to work with. Still, one can be talking up one's position and also be right. The accumulation of senescent cells is profoundly harmful, a significant contributi...
Source: Fight Aging! - December 25, 2022 Category: Research Authors: Reason Tags: Newsletters Source Type: blogs
Fight Aging! Newsletter, December 19th 2022
In conclusion, p16 deletion or p16 positive cell clearance could be a novel strategy preventing long term HFD-induced skin aging.
Association of LDL-Cholesterol with Mortality
https://www.fightaging.org/archives/2022/12/association-of-ldl-cholesterol-with-mortality/
Researchers here report on a study of LDL-cholesterol and mortality risk in older people. As they note, data on this topic is conflicted once one moves beyond the matter of cardiovascular disease. Over a lifetime, higher LDL-cholesterol makes it easier to reach the tipping point at which cholesterol deposited in blood vessel walls produces e...
Source: Fight Aging! - December 18, 2022 Category: Research Authors: Reason Tags: Newsletters Source Type: blogs
A High Level Survey of Mechanisms of Brain Aging
Ultimately, we live and die as the brain lives and dies. The rest of the body is a support system, a complex one to be sure, but probably not as complex as the brain. Repairing the cell and tissue damage of aging in the body seems a more tractable challenge, in that replacement is always an option. Replace cells, replace the gut microbiome, add new tissues grown in a lab to organs like the liver and thymus, or grow a new body and transplant the brain. A path of ever increasing control over cells, cell signaling, and regeneration implies a future in which all damaged tissue can be replaced in one way or another ... except f...
Source: Fight Aging! - December 14, 2022 Category: Research Authors: Reason Tags: Medicine, Biotech, Research Source Type: blogs
Reviewing the Role of SIRT6 in Aging
While much the history of work on sirtuins is one of disappointing results, the majority of that work involved SIRT1. Both SIRT3 and SIRT6 may be more interesting, based on animal studies conducted since the SIRT1 era. SIRT3 localizes to the mitochondria, and mitochondrial function is important in the context of aging. Researchers have shown that SIRT3 upregulation in mice improves hematopoietic stem cell function. SIRT6 upregulation, however, has been shown to modestly extend life in mice, there is a larger body of work surrounding its effects on metabolism than is the case for SIRT3, and at least one group is attempting ...
Source: Fight Aging! - December 12, 2022 Category: Research Authors: Reason Tags: Medicine, Biotech, Research Source Type: blogs
Fight Aging! Newsletter, December 12th 2022
In conclusion, selective removal of senescent dermal fibroblasts can improve the skin aging phenotype, indicating that BPTES may be an effective novel therapeutic agent for skin aging.
Non-Dividing Neurons Do In Fact Become Senescent, Impairing Brain Function
https://www.fightaging.org/archives/2022/12/non-dividing-neurons-do-in-fact-become-senescent-impairing-brain-function/
Cellular senescence is generally thought of as a characteristic of replicating cells; it is an end state reached when telomeres, reduced in length with each cell division, become too short. This is followed by programmed cell death...
Source: Fight Aging! - December 11, 2022 Category: Research Authors: Reason Tags: Newsletters Source Type: blogs
Assessing Mitochondrial Transfer Into Senescent Cells In Vitro
Researchers here report on in vitro experiments to show that introducing functional mitochondria into a cell culture containing senescent cells reduces markers of senescence. It is an interesting question as to how this would work in living tissue, where the numbers of senescent cells are low, and mitochondria will be introduced into all cells. Since several companies are developing mitochondrial transfer as a therapy to treat the loss of mitochondrial function that is characteristic of age-related disease, we'll find out in the years ahead. Those groups are not specifically targeting cellular senescence, but can hardly av...
Source: Fight Aging! - December 8, 2022 Category: Research Authors: Reason Tags: Medicine, Biotech, Research Source Type: blogs
Autophagy in Tauopathies Such as Alzheimer's Disease
Autophagy is the name given to a collection of maintenance processes responsible for tagging and recycling damaged, excess, or harmful proteins and structures in the cell. Better maintenance of molecular machinery means a better operation of cells and tissues. Upregulation of autophagy is a feature of many of the approaches shown to modestly slow aging in animal studies, those that mimic some of the biochemistry of calorie restriction. Calorie restriction itself is thought to improve health and longevity primarily through autophagy.
Here, researchers look at autophagy in the context of neurodegenerative conditions. ...
Source: Fight Aging! - December 7, 2022 Category: Research Authors: Reason Tags: Medicine, Biotech, Research Source Type: blogs
