Fight Aging! Newsletter, December 4th 2023
This study produced a great deal of data that continues to be mined for insights into human aging and effects of calorie restriction in a long-lived species such as our own, to contrast with the sizable effects on health and longevity in short-lived species such as mice. In particular, and the topic for today, cellular senescence and its role in degenerative aging has garnered far greater interest in the research community in the years since the CALERIE study took place. Thus in today's open access paper, scientists examine CALERIE study data to find evidence for calorie restriction to reduce the burden of cellular ...
Source: Fight Aging! - December 3, 2023 Category: Research Authors: Reason Tags: Newsletters Source Type: blogs

XPRIZE Healthspan, $101 Million to Incentivize Rejuvenation in Old People
Prizes for success in research and development can work well, if coupled with suitable publicity and activism. Such efforts have a long history, going back to the well-documented longitude rewards offered by the British government in the 1700s. More recently, the original Ansari X Prize for suborbital flight was a very successful example of this sort of initiative, and was launched around the same time as the Methuselah Mouse Prize to spur greater efforts to extend life in animal models. The Palo Alto Longevity Prize followed later with similar goals. Unfortunately for the ability of longevity-focused prizes to generate on...
Source: Fight Aging! - November 30, 2023 Category: Research Authors: Reason Tags: Activism, Advocacy and Education Source Type: blogs

Updates to DUX4 region on subtelomeric chromosome 4q
Sequence improvements and increased variant representation in the human genome reference assembly are priorities for the GRC. This blog post describes two updates in the recent GRCh38.p7 patch release affecting the DUX4 region located at the chromosome 4q sub-telomere: (1) a FIX patch correcting the chromosomal representation (KQ983257.1) and (2) a NOVEL patch representing a variant of the region (KQ983258.1). A third haplotype of DUX4 region which is represented in GRCh37 will be also described.The DUX4 region contains tandem arrays of a 3.3 Kb D4Z4 macrosatellite repeat located in the sub-telomer...
Source: GenomeRef - April 7, 2016 Category: Genetics & Stem Cells Source Type: blogs

Telomere Length: Cause of Aging or Marker of Aging?
Telomeres are repeating sequences of nucleic acids that cap the ends of chromosomes in the cell nucleus and stop actual gene-coding DNA from being chopped off when a cell divides. The mechanisms of DNA replication require extra leg room at the ends of the strand, a trailing sequence that is not copied over to the new strand under assembly - and the primary role of telomeres is to be the part that is dropped on the floor. A little of their length is thus lost with every cell division. This shortening acts as a clock to count cell divisions, and cells with very short telomeres stop replicating - they either enter cellular se...
Source: Fight Aging! - May 14, 2013 Category: Health Medicine and Bioethics Commentators Authors: Reason Tags: Medicine, Biotech, Research Source Type: blogs