Fight Aging! Newsletter, September 2nd 2019
In conclusion, in the absence of obesity, visceral adipose tissue possesses a pronounced anti-inflammatory phenotype during aging which is further enhanced by exercise.
Methods of Inducing Cellular Damage are Rarely Relevant to Aging, and the Details Matter
https://www.fightaging.org/archives/2019/08/methods-of-inducing-cellular-damage-are-rarely-relevant-to-aging-and-the-details-matter/
One of the major challenges in aging research is determining whether or not models of cellular or organismal damage and its consequences are in any way relevant to the natural processes of aging. One can hit a brick wit...
Source: Fight Aging! - September 1, 2019 Category: Research Authors: Reason Tags: Newsletters Source Type: blogs
Lipid Accumulation in Microglia Contributes to Neuroinflammation and Neurodegeneration
Researchers have found that microglia in the aging brain have a tendency to accumulate lipids, and that those that do are harmful. This is a fascinating discovery, given that microglia are essentially the central nervous system version of macrophages elsewhere in the body, and lipid accumulation in macrophages leading to senescence and inflammatory behavior is an important mechanism in atherosclerosis. Further, it is well established that microglia in the brain become inflammatory, senescent, and dysfunctional in later life, and this behavior contributes to the progression of neurodegenerative conditions. It has been demon...
Source: Fight Aging! - August 26, 2019 Category: Research Authors: Reason Tags: Daily News Source Type: blogs
Fight Aging! Newsletter, July 15th 2019
In conclusion, we show here that sEVs are responsible for mediating paracrine senescence and speculate that they could be involved in inducing bystander senescence during therapy-induced senescence or aging. In fact, when compared to soluble factors, sEVs have different biophysical and biochemical properties as they have a longer lifespan than do soluble factors and they are more resistant to protease degradation. The idea that blocking sEV secretion could be a potential therapeutic approach to alleviate senescence "spreading" during chemotherapy-induced senescence or in aging tissues presents itself as a very attractive t...
Source: Fight Aging! - July 14, 2019 Category: Research Authors: Reason Tags: Newsletters Source Type: blogs
The Question of a Limit to Human Life Span
In this study we re-examine both claims with more recent and reliable data on supercentenarians (persons aged 110 years and over).
We found that despite a dramatic historical increase in the number of supercentenarians, further growth of human longevity records in subsequent birth cohorts slowed down significantly and almost stopped for those born after 1879. We also found an exponential acceleration of age-specific death rates for persons older than 113 years in more recent data. Slowing down the historical progress in maximum reported age at death and accelerated growth of age-specific death rates after age 113 ye...
Source: Fight Aging! - July 12, 2019 Category: Research Authors: Reason Tags: Medicine, Biotech, Research Source Type: blogs
Fight Aging! Newsletter, June 3rd 2019
In conclusion, there is solid evidence that obesity deregulates cellular mechanisms related to nutrient sensing.
Altered Intercellular Communication
It is accepted that aging impacts the organism at the cellular level, but also decreases the capacity of cells of an organism to interact. During aging, there is a decreased communication at the neuronal, neuroendocrine, and endocrine levels. Two of the most compelling examples of impaired communication are inflammaging and immunosenescence. The inflammaging phenotype results in elevated cytokines. These cytokines can accelerate and propagate the aging process. T...
Source: Fight Aging! - June 2, 2019 Category: Research Authors: Reason Tags: Newsletters Source Type: blogs
Decreased Cerebrospinal Fluid Flow is Associated with Cognitive Decline
Many neurodegenerative conditions are associated with the accumulation of forms of metabolic waste in the central nervous system, protein aggregates that form solid deposits between or within cells. Tauopathies such as frontotemporal dementia are associated with tau aggregates, synucleinopathies such as Parkinson's disease with α-synuclein, and amyloidoses with varying forms of amyloid, such as the amyloid-β found in elevated amounts in Alzheimer's disease patients. Alzheimer's itself is an amyloidosis that also becomes a tauopathy in its later stages. These protein aggregates and their surrounding halos of harmful bioch...
Source: Fight Aging! - May 28, 2019 Category: Research Authors: Reason Tags: Medicine, Biotech, Research Source Type: blogs
Fight Aging! Newsletter, May 13th 2019
In this study, a significant (30%) increase in maximum lifespan of mice was found after nonablative transplantation of 100 million nucleated bone marrow (BM) cells from young donors, initiated at the age that is equivalent to 75 years for humans. Moreover, rejuvenation was accompanied by a high degree of BM chimerism for the nonablative approach. Six months after the transplantation, 28% of recipients' BM cells were of donor origin. The relatively high chimerism efficiency that we found is most likely due to the advanced age of our recipients having a depleted BM pool.
In addition to the higher incorporation rates, ...
Source: Fight Aging! - May 12, 2019 Category: Research Authors: Reason Tags: Newsletters Source Type: blogs
Amyloid- β Aggregation Accelerates Age-Related Activation of Microglia
This open access paper is illustrative of present work on the role of microglial dysfunction and chronic inflammation in Alzheimer's disease. The central nervous system immune cells called microglia become inappropriately inflammatory with age. A new consensus on Alzheimer's disease is that initial amyloid-β accumulation causes far greater than usual chronic disarray and inflammatory signaling in the supporting cells of the brain, such as microglia, astrocytes, and oligodendrocytes. This in turn leads to the much more damaging tau aggregation and consequent damage and death of neurons.
Alzheimer's disease (AD) is...
Source: Fight Aging! - May 7, 2019 Category: Research Authors: Reason Tags: Daily News Source Type: blogs
Fight Aging! Newsletter, April 29th 2019
In this study, we report the age-associated differences between fetal MSC (fMSC) populations and MSCs isolated from elderly donors with respect to their transcriptomes. We successfully reprogrammed fMSCs (55 days post conception) and adult MSC (aMSC; 60-74 years) to iPSCs and, subsequently, generated the corresponding iMSCs. In addition, iMSCs were also derived from ESCs. The iMSCs were similar although not identical to primary MSCs. We unraveled a putative rejuvenation and aging gene expression signature. We show that iMSCs irrespective of donor age and cell type re-acquired a similar secretome to that of their parent...
Source: Fight Aging! - April 28, 2019 Category: Research Authors: Reason Tags: Newsletters Source Type: blogs
Amyloid- β is not Merely Molecular Waste
Alzheimer's disease begins with the accumulation of amyloid-β in the brain, but this doesn't mean that amyloid-β is purely molecular waste. Yes, it is harmful given the presence of too much of it in the central nervous system, but that is true of most of our biochemistry. There is good evidence for amyloid-β to act as an antimicrobial system, for example, which is the basis for considering persistent infection as a potential contributing cause of Alzheimer's disease, in which infectious agents drive the generation of ever increasing amounts of amyloid-β. Even setting aside that and other evidence, however, it is quite ...
Source: Fight Aging! - April 25, 2019 Category: Research Authors: Reason Tags: Daily News Source Type: blogs
Sudbury Is Still Waiting...
Bill Crumplin, with photo of his late wife Donna Williams, image courtesy Sudbury.comYou might recall mypost of a few years ago about Sudbury, Ontario, Canada, a medium-sized town that turned to its citizens to fund a PET/CT facility when the much-touted Health Service would not provide it. The wait-time was not just an inconvenience; the health of Sudbury citizens was adversely affected by the lack of local scanning capability.The wait goes on, it seems.My friend Stacey discoveredanother such tragedy related to imaging, or rather, lack thereof. As reported onSudbury.com:Donna Williams ’ dying wish was to raise money tow...
Source: Dalai's PACS Blog - April 4, 2019 Category: Radiology Source Type: blogs
Fight Aging! Newsletter, April 1st 2019
In conclusion, long-term aerobic exercise appears to attenuate the decline in endothelial vascular function, a benefit which is maintained during chronological aging. However, currently there is not enough evidence to suggest that exercise interventions improve vascular function in previously sedentary healthy older adults.
Hijacking the Proteasome to Dispose of Unwanted Molecules in Age-Related Disease
https://www.fightaging.org/archives/2019/03/hijacking-the-proteasome-to-dispose-of-unwanted-molecules-in-age-related-disease/
Cells are equipped with a protein disposal system in the form of the proteas...
Source: Fight Aging! - March 31, 2019 Category: Research Authors: Reason Tags: Newsletters Source Type: blogs
Does Klotho Act on Cognitive Function via FGF23?
Klotho is a longevity gene in that more of the protein it codes for acts to modestly extend life in mice. Levels of klotho protein decline with age, and increased amounts appear to produce beneficial outcomes in health and longevity in part via stem cell function. Klotho also influences cognition, and a number of research groups are working on approaches, such as gene therapies to upregulate klotho expression, or delivery of recombinant protein fragments of the full klotho molecule, that might at some point result in ways to enhance cognitive function in humans, old and young alike.
Klotho is known to be closely rel...
Source: Fight Aging! - March 28, 2019 Category: Research Authors: Reason Tags: Daily News Source Type: blogs
Phase II Clinical Trial Results for the Eidos Therapeutics Approach to Transthyretin Amyloidosis
This study represents the first clinical experience with AG10 in the target patient population of transthyretin amyloidosis cardiomyopathy (ATTR-CM). Administration of AG10 was well tolerated and was not associated with safety signals of potential clinical concern. In the present study AG10 treatment increased serum TTR levels from baseline and brought those levels to within the normal range in all subjects, both mutant and wild-type. This included subjects whose baseline levels were markedly below the normal range. The 28-day treatment duration of the present study limits any assessment of clinical benefit.
The ser...
Source: Fight Aging! - March 27, 2019 Category: Research Authors: Reason Tags: Medicine, Biotech, Research Source Type: blogs
Fight Aging! Newsletter, March 11th 2019
Fight Aging! provides a weekly digest of news and commentary for thousands of subscribers interested in the latest longevity science: progress towards the medical control of aging in order to prevent age-related frailty, suffering, and disease, as well as improvements in the present understanding of what works and what doesn't work when it comes to extending healthy life. Expect to see summaries of recent advances in medical research, news from the scientific community, advocacy and fundraising initiatives to help speed work on the repair and reversal of aging, links to online resources, and much more.
This content is...
Source: Fight Aging! - March 10, 2019 Category: Research Authors: Reason Tags: Newsletters Source Type: blogs
