Fight Aging! Newsletter, September 26th 2022
This study examined the dose-response association between daily step count and intensity and incidence of all-cause dementia among adults in the UK. This was a UK Biobank prospective population-based cohort study (February 2013 to December 2015) with 6.9 years of follow-up (data analysis conducted May 2022). A total of 78,430 of 103,684 eligible adults aged 40 to 79 years with valid wrist accelerometer data were included. Registry-based dementia was ascertained through October 2021.
We found no minimal threshold for the beneficial association of step counts with incident dementia. Our findings suggest that approxima...
Source: Fight Aging! - September 25, 2022 Category: Research Authors: Reason Tags: Newsletters Source Type: blogs
Rapamycin, Acarbose, and Phenylbutyrate Combination Slows Cognitive Decline in Mice
You might recall that researchers recently reported that the combination of rapamycin, acarbose, and phenylbutyrate appear to meaningfully improve physical function in old mice. Here, the same team reports on the efforts of this intervention on cognitive function in mice. Individually, these treatments, applied over the long term, are all shown to slow aging to some degree in mice. It remains to be seen whether combination treatments of this sort, upregulation of cellular stress responses, mimicking aspects of the cellular response to exercise and calorie restriction, will be as useful in humans. It is the case that life s...
Source: Fight Aging! - September 19, 2022 Category: Research Authors: Reason Tags: Daily News Source Type: blogs
Fight Aging! Newsletter, August 8th 2022
In conclusion, aging research will benefit from a better definition of how specific regulators map onto age-dependent change, considered on a phenotype-by-phenotype basis. Resolving some of these key questions will shed more light on how tractable (or intractable) the biology of aging is.
Does Acarbose Extend Life in Short Lived Species via Gut Microbiome Changes?
https://www.fightaging.org/archives/2022/08/does-acarbose-extend-life-in-short-lived-species-via-gut-microbiome-changes/
Acarbose is one of a few diabetes medications shown to modestly slow aging in short-lived species. Researchers here take a...
Source: Fight Aging! - August 7, 2022 Category: Research Authors: Reason Tags: Newsletters Source Type: blogs
Does Acarbose Extend Life in Short Lived Species via Gut Microbiome Changes?
Acarbose is one of a few diabetes medications shown to modestly slow aging in short-lived species. Researchers here take a look at the evidence for this effect on life span to be mediated by changes in the gut microbiome. The gut microbiome changes with age: the relative numbers of harmful microbes increasing, contributing to the chronic inflammation of aging, while relative numbers of beneficial microbes decreases, causing a reduction in metabolites known to help tissue function. Directly changing the gut microbiome to a more youthful configuration via fecal microbiota transplantation has been shown to improve health and ...
Source: Fight Aging! - August 3, 2022 Category: Research Authors: Reason Tags: Daily News Source Type: blogs
Fight Aging! Newsletter, April 11th 2022
In conclusion, plasma levels of IGHA2, APOA and HPT are associated with subclinical atherosclerosis independently of traditional risk factors and offers potential to predict this disease. The panel could improve primary prevention strategies in areas where imaging is not available.
A Lesser Diversity of Circulating Antibodies in the Aging Killifish Immune System
https://www.fightaging.org/archives/2022/04/a-lesser-diversity-of-circulating-antibodies-in-the-aging-killifish-immune-system/
Short-lived killifish are one of the more recently adopted animal models of aging. All such models are a trade-off bet...
Source: Fight Aging! - April 10, 2022 Category: Research Authors: Reason Tags: Newsletters Source Type: blogs
Arguing for More, and More Rigorous, Drug Repurposing Efforts to Slow Aging
The authors of today's open access paper argue for much greater effort to be directed towards the repurposing of existing drugs with the goal of slowing aging. I have mixed feelings about the prevalence of drug repurposing in the pharmaceutical industry. The FDA makes it so very expensive to introduce any new drug that industry of course responds to the incentives and spends a great deal of time digging through the existing library of approved drugs in search of those that can be used in different circumstances. It is a great deal easier to take a drug with established safety data and seek approval for a new use than it is...
Source: Fight Aging! - April 7, 2022 Category: Research Authors: Reason Tags: Medicine, Biotech, Research Source Type: blogs
Fight Aging! Newsletter, February 14th 2022
In conclusion, this first examination of the effects of age and the ageing process on the small intestinal microbiome demonstrates that the duodenal microbiome changes with increasing age, with significant decreases in duodenal microbial diversity due to increased prevalence of phylum Proteobacteria, particularly coliforms and anaerobic taxa. Given the key roles of small intestinal microbes in nutrient absorption and host metabolism, these changes may be clinically relevant for human health during the ageing process.
Naked Mole Rats Exhibit Minimal Cardiac Aging
https://www.fightaging.org/archives/2022/02/nake...
Source: Fight Aging! - February 13, 2022 Category: Research Authors: Reason Tags: Newsletters Source Type: blogs
Improved Physical Function in Old Mice Treated with Rapamycin, Acarbose, and Phenylbutyrate
It is quite rare for researchers to attempt combined treatments, unfortunately. The panoply of calorie restriction mimetics and other approaches to gently upregulate stress responses are individually not all that impressive, and it remains unclear as to which of them can be stacked for greater effect. In the treatment of aging, even the better approaches that produce actual and rapid rejuvenation, such as senolytic therapies to destroy senescent cells, will have to be stacked with one another. There are many different contributing causes of aging. Here, researchers report that a combination therapy carried out for a few mo...
Source: Fight Aging! - February 8, 2022 Category: Research Authors: Reason Tags: Daily News Source Type: blogs
Fight Aging! Newsletter, October 4th 2021
In conclusion, premature thymic involution and chronic inflammation greatly contribute to increased morbidity and mortality in CKD patients. Mechanisms are likely to be multiple and interlinked. Even when the quest to fountain of youth is a pipe dream, there are many scientific opportunities to prevent or to, at least in part, reverse CKD-related immune senescence. Further studies should precisely define most important pathways driving premature immune ageing in CKD patients and best therapeutic options to control them.
Extending Life Without Extending Health: Vast Effort Directed to the Wrong Goals
https://ww...
Source: Fight Aging! - October 3, 2021 Category: Research Authors: Reason Tags: Newsletters Source Type: blogs
Responses to Age-Slowing Interventions Differ by Organ and Gender
Once one starts to investigate, tissue type by tissue type, the effects of interventions known to modestly slow aging, one finds differences. This could be a matter of differences in the biodistribution of a particular therapeutic agent, or it could be that various forms of age-related damage are more or less significant in different organs, or that the regulation of stress responses differs from tissue to tissue, such that some therapeutics target a regulatory pathway more relevant to a kidney than a lung, for example. All of this implies that great deal of work lies ahead, if every potential therapy must be mapped by its...
Source: Fight Aging! - September 27, 2021 Category: Research Authors: Reason Tags: Daily News Source Type: blogs
Fight Aging! Newsletter, September 6th 2021
In conclusion, patients over 90 years of age had an overall low prevalence of fractures and relative preservation of bone health, suggesting a preserved bone molecular profile in these individuals. Epigenetic factors and activity levels might also have favorably affected bone health. The low percentage of osteoporosis and fractures likely reduced the morbidity and mortality in this population, potentially contributing to their overall longevity.
Building a Therapy for Aging Based on SIRT6 Upregulation
https://www.fightaging.org/archives/2021/08/building-a-therapy-for-aging-based-on-sirt6-upregulation/
G...
Source: Fight Aging! - September 5, 2021 Category: Research Authors: Reason Tags: Newsletters Source Type: blogs
Most Small Molecules that Influence Life Span in Model Organisms Also Influence Expression of Extracellular Matrix Genes
An interesting observation is discussed in this open access paper, which is that most small molecule compounds that extend life in short lived species also change the expression of extracellular matrix genes. The majority of such compounds are thought to extend life by provoking some of the same stress response mechanisms as calorie restriction, heat shock, and other common stressors, resulting in improved cell maintenance and thus improved cell and tissue function. Why do they also lead to changes in cellular activity relating to the maintenance of the extracellular matrix? A detailed answer to that question may emerge at...
Source: Fight Aging! - August 31, 2021 Category: Research Authors: Reason Tags: Daily News Source Type: blogs
Postprandial syncope : Incidence, mechanism & hemodynamics.
Syncope is one of the common, yet difficult symptoms to evaluate especially in the elderly. Post-prandial syncope is one condition likely to be missed out.As the name suggests It has a distinct relationship with food intake. Mild fall in postprandial BP is an expected response but if it exceeds a limit* syncope is triggered. (*Highly variable)
Hemodynamics of Postprandial state
Normally splanchnic circulation demands up to a 25% increase in blood volume after a moderately large meal.
When this happens there must be compensatory vasoconstriction elsewhere especially in muscles. Lack of this respon...
Source: Dr.S.Venkatesan MD - June 24, 2021 Category: Cardiology Authors: dr s venkatesan Tags: Cardiology -Clinical signs Cardiology -Definitions Cardiology -Hemodynamics Cardiology -Mechnisms of disease Syncope gastrointestinal cause for syncope orthostatic vs postprandial hypotension post prandial hypotension post-prandial hypoten Source Type: blogs
Fight Aging! Newsletter, April 19th 2021
In conclusion, airway pressure treatment and adherence are independently associated with lower odds of incident AD diagnoses in older adults. Results suggest that treatment of OSA may reduce risk of subsequent dementia. (Source: Fight Aging!)
Source: Fight Aging! - April 18, 2021 Category: Research Authors: Reason Tags: Newsletters Source Type: blogs
Cap-Independent Translation of mRNA as a Common Mechanism of Longevity
Researchers here show that increased levels of cap-independent translation (CIT) of messenger RNA (mRNA) take place in a diverse set of interventions known to modestly slow aging in mice, suggesting it to be a common phenomenon in these shifts of metabolism towards a slower pace of aging. CIT is a process that in part drives the movement of mRNA, produced from genetic blueprints, into ribosomes for the production of proteins. Since protein levels determine cell behavior, the way in which translation of mRNA into proteins takes place is important. The work here makes a compelling case to link altered CIT levels to mTORC1 in...
Source: Fight Aging! - April 12, 2021 Category: Research Authors: Reason Tags: Daily News Source Type: blogs
