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Fight Aging! 04/02/2020 06:22
Researchers here suggest that the direction of causation between physical decline and cognitive decline is largely the opposite of the present consensus. Most of the evidence of recent decades points to physical decline, and associated lack of activity, having a negative impact the brain. Certainly there are any number of studies showing exercise to have a beneficial effect on cognitive function. Here, however, researchers propose that declines in cognitive function lead the declines in physical function in aging. Someone dies somewhere in the world every 10 seconds owing to physical inactivity - 3.2 million people a year. From the age of 50, there is a gradual decline not just in physical activity but also in cognitive abilities since the
Fight Aging! 04/02/2020 06:11
The work here might be taken as an indication of the importance to aging of chronic inflammation and breakdown of the intestinal barrier generated in part by changes in the gut microbiome. Oral supplementation with the enzyme intestinal alkaline phosphatase (IAP) reduces both of these issues, and the result is mice that exhibit a slowed aging and lesser degrees of age-related frailty. It's now accepted that gut-barrier dysfunction and gut-derived chronic inflammation play a role in human aging, but how that process is regulated is still largely a mystery. Studying mice and fruitflies, researchers found that the enzyme intestinal alkaline phosphatase (IAP) helped prevent intestinal permeability and gut-derived systemic inflammation, resultin.
Fight Aging! 04/01/2020 15:26
It is well known that the gut microbiome is influential on long-term health, and undergoes detrimental changes with advancing age. Beneficial species decline, while inflammatory and otherwise unhelpful species prosper. The reasons for these changes are not well understood, but probably involve a combination of many factors, such as diet, immune dysfunction, and so forth. There is a growing interest in the research community in assessing the contribution of gut microbiome changes to degenerative aging, and finding ways to reverse those changes. The study noted here is less interesting for the presented data, and more interesting for demonstrating that one can in fact transplant gut microbes from a human to a mouse and expect to see results t.
Fight Aging! 04/01/2020 06:22
Cellular senescence is one of the contributing causes of aging, in the sense that senescent cells accumulate in old tissues. Even when only a tiny fraction of all cells are senescent, their signaling causes chronic inflammation and disruption of tissue function. Senescence is, however, a helpful program when these cells exist only temporarily and are promptly destroyed. The signaling that is so harmful when maintained over the long term aids in wound healing and suppression of cancer when present for a short time only. Since the comparatively recent acceptance of senescent cells as an important cause of aging, the research community has spent a great deal of effort in better understanding the biochemistry of cellular senescence. The open ac.
Fight Aging! 04/01/2020 06:11
Researchers here consider a very conservative set of interventions known to modestly slow the progression of aging in laboratory species, largely by altering metabolism to upregulate beneficial cellular stress responses. The researchers look through the lens of lung aging, specifically, reviewing the evidence for these therapies to slow the deterioration in lung function and onset of lung disease in older individuals, or to be the basis for treating established lung disease. To date, the most reliable, best-researched way to extend life span is through the practice of calorie restriction (CR), which involves reducing calorie intake while simultaneously maintaining good nutritional status. Although the effects of diet on lung aging per se ha.
Fight Aging! 03/31/2020 15:46
The Alzheimer's disease research community is nowadays ever more strongly considering chronic inflammation in the brain as a vital part of the progression of the condition. In the amyloid cascade hypothesis, a slow aggregation of amyloid-β over decades (for reasons that are debated) causes ever greater inflammatory dysfunction in microglia, the immune cells of the brain responsible for clearing up metabolic waste such as protein aggregates. That inflammation in turn sets the stage for tau aggregation to take place to a significant degree, causing cell death and severe neural dysfunction. Today's open access research is an example of the sort of work taking place to better understand how amyloid-β interacts with microglia to produce the outc.
Fight Aging! 03/31/2020 06:22
Mesenchymal stem cell therapies vary widely in their ability to influence regeneration, though they fairly reliably reduce chronic inflammation in older patients. One challenge is that there is no standard on what constitutes a mesenchymal stem cell; it is a category so broad as to be almost meaningless. Further, two clinics performing what is ostensibly the same protocol using cells from the same source can produce widely divergent outcomes. In most cases, near all transplanted cells die, and the benefits obtained for the patient derive from signaling produced by the stem cells in the short period of survival following transplantation. A large fraction of this signaling is carried by extracellular vesicles, and since these vesicles can be
Fight Aging! 03/31/2020 06:11
Researchers here identify miR-155-5p as a potential target to improve mitochondrial function. This microRNA is upregulated with age, and appears to inhibit mitochondrial fission. That in turn prevents the cellular maintenance process of mitophagy from clearing out worn and damaged mitochondria efficiently enough to prevent loss of function. Since mitochondria provide the chemical energy store molecules that power all cellular operations, this has downstream consequences on cell and tissue function, including higher levels of cellular senescence. Aging impairs the functions of human mesenchymal stem cells (MSCs), thereby severely reducing their beneficial effects on myocardial infarction (MI). MicroRNAs (miRNAs) play crucial roles in regulat.
Fight Aging! 03/30/2020 06:22
The cellular housekeeping mechanisms of autophagy act to recycle proteins and structures within the cell. Upregulation of autophagy appears to be a crucial part of the reason why the response to mild stresses - such as heat, cold, lack of nutrients, and toxins - can actually improve cell and tissue function. Certainly the practice of calorie restriction relies upon functional autophagy in order to extend healthy life span. Researchers here note that autophagy is important in the maintenance of the many stem cell populations throughout the body that are required for ongoing tissue maintenance. The characteristic impairment of autophagy in later life, taking place for reasons that are only partially explored, may make a sizable contribution t.
Fight Aging! 03/30/2020 06:11
Chimeric antigen receptor T cell therapies have done well in the treatment of leukemias, and are being adapted for use with cancers that form solid tumors. A patient's own cells are engineered to bear a new synthetic receptor that matches a specific protein on the surface of cancerous cells, which encourages an effective immune response against the cancer. As researchers discuss here, an alternative to the continued use of T cells of the adaptive immune system is to apply chimeric antigen receptors to macrophages of the innate immune system instead. Chimeric antigen receptor (CAR) T cell therapy has been a game-changer for blood cancers but has faced challenges in targeting solid tumors. Now researchers may have an alternative to T cell the.
Fight Aging! 03/29/2020 08:47
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 more: https://www.fightaging.org/services/ Contents Ronjon Nag on Investment in the Longevity Industry Reviving Cardiomyocytes via Coincub.
Fight Aging! 03/27/2020 15:11
Macrophages are cells of the innate immune system, found throughout the body, and which play a great many roles beyond the obvious ones of defending against invading pathogens. They destroy cancerous and senescent cells, ingest molecular waste and debris between cells, and participate in the processes of tissue regeneration and maintenance, to pick a few examples. Further, the immune system of the brain includes an analogous population of cells known as microglia, which additionally take on supporting roles essential to the proper functioning of neurons and their synaptic connections. Chronic inflammation is important in the progression of age-related diseases, and as a part of the immune system macrophages are very much involved in inflamm.
Fight Aging! 03/27/2020 06:11
Age-related changes in gut microbe populations provide an important contribution to the chronic inflammation that is characteristic of old age. Beneficial species diminish in number, reducing the production of metabolites that aid in optimal cell and tissue function. Harmful species increase in number, interacting with tissue and the immune system in ways that promote chronic inflammation. Practical approaches to reverse the age-related changes observed in the gut microbiome could be realized quite soon, given the will and funding: some form of fecal microbiota transplant, or intense probiotic treatment, perhaps. The former has been demonstrated to work in animals, improving health and extending life, and is already practiced for human pati.
Fight Aging! 03/26/2020 15:55
I had quite forgotten about the video of this short commentary I'd given last year at Giant Health in London. I was recently prompted for a transcript by someone, and so here it is. This conference was a mainstream health event, not normally a place that would have any great focus on longevity and aging. However, the Aikora Health principals had claimed one of the stages and put together a set of presentations from various people involved in the development of means to treat aging, myself included. All of us were ambushed by interviewers with cameras at some point in the proceedings, and hence this video. Longevity research and gene therapy: where are we now? Certainly this event is an example of some of the […]
Fight Aging! 03/26/2020 06:22
The gut microbiome changes with age in ways that provoke chronic inflammation. Beneficial microbial populations decline in number while harmful populations expand. This is likely the result of numerous contributing factors, including dietary changes characteristic of age and the decline of the immune system, but at this point it is a challenge to pin down which of these processes are more versus less important to the overall outcome. It is well known that chronic inflammation drives a faster progression of many of the common age-related diseases, including neurodegenerative conditions. Thus it is expected to find links between the gut microbiome and conditions such as Alzheimer's disease, as is discussed here. Factors that may be involved i.
Fight Aging! 03/26/2020 06:11
Researchers here provide evidence for natural killer cells to act to reduce inflammation in the brain. This is of interest because chronic inflammation in brain tissue, neuroinflammation, is a prominent feature of neurodegenerative diseases such as Alzheimer's disease and Parkinson's disease. If a natural mechanism that suppresses inflammation can be harnessed, it might be possible to slow or reverse neurodegenerative conditions, given that inflammation appears to play such a significant role in their progression. That said, recent work on cellular senescence in the supporting cells of brain suggests that selectively eliminating those senescent cells, and thus their inflammatory signaling, via senolytic therapies might be a more direct and
Fight Aging! 03/25/2020 06:22
Macrophage cells are derived from circulating monocytes, and, among many other tasks, are responsible for clearing out lipid deposits from blood vessel walls. The conventional view on the age-related nature of atherosclerosis, the build up of fatty deposits that narrow and weaken blood vessels, is that macrophages are vulnerable to oxidized lipids, particularly oxidized cholesterols such as 7-ketocholesterol. These oxidized lipids are far more prevalent in older people, a consequence of the cellular damage of aging. Macrophages in old tissues are overwhelmed by oxidized lipids and become inflammatory, dysfunctional foam cells, and then die, adding their debris to a growing atherosclerotic plaque. Researchers here argue that the well known d.

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