Toggle light / dark theme

Scientists find that for stem cells to be healthy, telomere length has to be just right

The Goldilocks zone with telomere length is the key.


Ever since researchers connected the shortening of telomeres—the protective structures on the ends of chromosomes—to aging and disease, the race has been on to understand the factors that govern telomere length. Now, scientists at the Salk Institute have found that a balance of elongation and trimming in stem cells results in telomeres that are, as Goldilocks would say, not too short and not too long, but just right.

The finding, which appears in the December 5, 2016, issue of Nature Structural & Molecular Biology, deepens our understanding of and could help advance stem cell-based therapies, especially related to aging and regenerative medicine.

“This work shows that the optimal length for is a carefully regulated range between two extremes,” says Jan Karlseder, a professor in Salk’s Molecular and Cell Biology Laboratory and senior author of the work. “It was known that very short telomeres cause harm to a cell. But what was totally unexpected was our finding that damage also occurs when telomeres are very long.”

CellAge: Targeting Senescent Cells With Synthetic Biology

The fourth Lifespan.io campaign and CellAge are using synthetic biology to create an accurate aging biomarker for senescent cells and a new therapy for precision targeting of those problem cells. Senescent cells are one of the processes of aging and this could change the way we age.


Lifespan.io is proud to present our fourth rejuvenation biotechnology project!

As we age our bodies accumulate damage in the form of dysfunctional cells that have entered a state called “senescence”, which secrete toxic signals that can lead to chronic inflammation, higher rates of cancer and additional aging-related conditions.

In order to address this CellAge, an Edinburgh based startup, has just launched a new Lifespan.io campaign to develop methods that will help researchers target, and eventually remove, these cells from the body and thereby assist in restoring it to youthful functionality.

Central to their project is the development of new synthetic DNA promoters which are specific to senescent cells, as promoters that are currently being used to track them, such as the p16 gene promoter, have various limitations. If successful, they will follow this up by validating gene therapies for senescent cell removal, initially for patients with progeroid syndromes, those who have undergone radiotherapy, and eventually those with age-related disease.

A New Aging Discovery Could Allow Humans to Extend Their Lifespan

In Brief

  • By observing the transparent cells of roundworms, researchers have uncovered a link between lifespan and the natural cellular process of RNA splicing.
  • This research could lead to new breakthroughs in anti-aging treatments that would allow humans to indefinitely keep ourselves healthy, stalling death for as long as possible.

Though aging seems like one of the most natural things, an affair common to all living creatures, the process is actually poorly understood by scientists. A new study detailed in Nature aims to shed light on the phenomenon as a research team led by the Harvard T.H. Chan School of Public Health has uncovered a relationship between lifespan and RNA splicing, a core function of cells that allows a single gene to produce a variety of proteins.

The researchers already knew that mutations in RNA splicing could lead to disease, but they wanted to find out if the act of splicing itself had an impact on the aging process. To find out, they designed experimental setups using the roundworm Caenorhabditis elegans, which show visible signs of aging during their short three-week lifespan.

Infertility breakthrough as cancer drug sparks growth of new eggs in ‘astonishing’ discovery

Infertile women have been offered new hope after scientists found that a common cancer drug triggers the development of new eggs, an outcome which was previously thought to be impossible.

In a discovery hailed as “astonishing”, researchers at the University of Edinburgh proved it is possible to reverse the clock and coax the ovaries back into a pre-pubescent state where they begin to produce new eggs.

Women are born with all their eggs, which is why conceiving becomes harder with age, because the eggs grow old, become damaged and eventually run out entirely.

Fight Aging predicts the sequence of arrival for meaningful antiaging therapies

The full antiaging rejuvenation toolkit of the next few decades will consist of a range of different treatments, each targeting a different type of molecular damage in cells and tissues. Fightaging predicts the likely order of arrival of some of these therapies, based on what is presently going on in research, funding, and for-profit development.

1) Clearance of Senescent Cells

Everon Biosciences, Oisin Biotechnologies, SIWA Therapeutics, and UNITY Biotechnology are all forging ahead with various different approaches to the selective destruction of senescent cells. No doubt many groups within established Big Pharma entities are also taking a stab at this, more quietly, and with less press attention. UNITY Biotechnology has raised more than $100 million to date, demonstrating that there is broad enthusiasm for this approach to the treatment of aging and age-related disease.

You shop. Amazon gives

Please support SENS Research on Amazon Smile this Christmas smile


Dont forget you can help SENS Research Foundation even during your Christmas shopping this year! Using Amazon Smile you can buy your gifts in the normal way but Amazon will donate 0.5% of the price of your eligible AmazonSmile purchases to us whenever you shop on AmazonSmile. bigsmile

#aging #sens

How to end aging: Aubrey de Grey at TEDxOxbridge

The weekend is here so let’s kick it off with a great talk by Dr. Aubrey de Grey at TED in 2014.


Biotechnologist Aubrey de Grey talks about aging as a disease — and how it can be cured.

In the spirit of ideas worth spreading, TEDx is a program of local, self-organized events that bring people together to share a TED-like experience. At a TEDx event, TEDTalks video and live speakers combine to spark deep discussion and connection in a small group. These local, self-organized events are branded TEDx, where x = independently organized TED event. The TED Conference provides general guidance for the TEDx program, but individual TEDx events are self-organized.* (*Subject to certain rules and regulations)

Drugs to Extend Life — Nathaniel David, CEO of Unity Biotechnology

Nathaniel David from Unity Biotech giving a talk about the potential of Senolytics and how science can break the natural limit to lifespan. David is the CEO of Unity Biotechnology a company taking SENS based Senolytic drugs into human clinical trials in the next year or so. Very exciting as this is the first true rejuvenation biotechnology therapy to be deployed in humans.


Unity is leading the way for the first rejuvenation technologies in the #sens model. Here we have Nathaniel David from Unity talking about the potential of Senolytics and increased lifespans.

Unity Biotechnology is one of a number of companies developing Senolytic therapies to clear senescent cells from the body and they will no doubt be joined by them in the future a sure sign of the rising interestin the field.

There is however no doubt at this moment in time that Unity is leading the charge and with recent investment from Amazon’s Bezos and their movement into human clinicial trials within a year or so they are certainly the pioneers of this exciting new therapy.

#aging #crowdfundthecure

Mitochondrial Repair Project

A look back at one of the milestones for SRF and the first successful fundraiser on Lifespan.io for MitoSENS.


We need your support at this critical juncture of the MitoSENS project. The MitoSENS team has already demonstrated the rescue of cells containing mitochondrial mutations, and has recently generated highly promising preliminary data showing the rescue of the complete loss of a mitochondrial gene. Our next steps will focus on improving the effectiveness of the targeting system, so that we can repeat our success with one mitochondrial gene to all thirteen. We will then transition this work into animal models of mitochondrial dysfunction. This would be a crucial step in what may be the development of an eventual cure for aging and aging related diseases.

We have a talented team of highly trained mitochondrial biologists working on MitoSENS. Right now the rate-limiting factor is the cost of the expensive reagents that we use for these experiments. Increasing our funding with this campaign will allow us to double the pace of our research and bring results to the public that much faster. We have made preliminary progress on rescuing function with a second gene, ATP6, and your support will help us perfect our targeting of both ATP8 and ATP6. This requires more cells, more viruses, and many new synthetic gene sequences. Specifically, we will spend your generous donations on cell culture reagents, oxygen consumption measurements, virus production, quantitative reverse transcription PCR, DNA synthesis services, and publication of our results in a peer-reviewed journal.

Your support will help take us there.

/* */