Tag Archives: Biology

Two Proteins let Skin Cells to return to life

Never mind facial masks and exfoliating scrubs, skin takes care of itself. Stem cells located within the skin actively generate differentiating cells that can ultimately form either the body surface or the hairs that emanate from it. In addition, these stem cells are able to replenish themselves, continually rejuvenating skin and hair. Now, researchers at Rockefeller University have identified two proteins that enable these skin stem cells to undertake this continuous process of self-renewal.

The work, published in Nature Genetics, brings new details to the understanding of how stem cells maintain — and lose — their status as stem cells
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Advance In Genetic Modification Of Embryonic Stem Cells

UC San Diego scientists have dramatically improved the success rate of genetically modifying human embryonic stem cells. This advance brings the promise of better treatment of genetic diseases.
The new approach works in 20 percent of embryonic stem cells, compared to less than 1 percent treated with standard methods, said Yang Xu, a UCSD professor of biology, who led the study, assisted by Hoseok Song and Sun-Ku Chung, postdoctoral fellows in his lab.

The study was published Thursday in the journal Cell Stem Cell.
Some genetic diseases can’t be studied adequately in animals, Xu said, so the ability to produce human cells
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Starving causes restoration of stem cells in immune system

In the first evidence of a natural intervention triggering stem cell-based regeneration of an organ or system, a study shows that cycles of prolonged fasting not only protect against immune system damage — a major side effect of chemotherapy — but also induce immune system regeneration, shifting stem cells from a dormant state to a state of self-renewal.

In both mice and a Phase 1 human clinical trial, long periods of not eating significantly lowered white blood cell counts. In mice, fasting cycles then “flipped a regenerative switch,” changing the signaling pathways for hematopoietic stem cells, which are responsible for
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Stem Cell scientists say soon we’ll create new hearts in just 24h

Dean Third used to look forward to weekends spent refereeing local football matches, and outings with his young family. But now even walking to the end of the road can leave him breathless and exhausted.

For the past four years, the father of four has suffered from dilated cardiomyopathy (DCM), a disease of the heart muscle which causes it to enlarge, affecting its ability to pump blood to the arteries.
The condition afflicts 12,000 people in the UK, and for most sufferers the cause is unknown. If uncontrolled it can be fatal, and patients must adhere strictly to a regime of
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Stem cell trial on horses

Veterinarians in Wichita conducted the first phase of a stem cell trial today in Wichita. Their goal is to treat laminitis, a disease in horses hoofs. They will do this using stem cells taken from the horses using liposuction. Laminitis is painful and even crippling for horses.

“Those horses usually digress over time to the point where they finally lose their life,” Dr. Preston Hickman said.

The trial is 90 days. The ten horses participating will have 3 stem cell injections over the three months.