Scientists sometimes just prove the obvious, like that men and women are different. If we can talk body without talking bawdy, there are some new discoveries about body works that should put a spring in your step today about how your body works.
Muscle milk: Whether you’re brawny or scrawny, you care about muscle. The most assiduous bodybuilder, though, should thank a tiny little signaling molecule that makes that burn lead to a good flex. Next to a photo of big delts and biceps, Stephanie Pappas on Live Science explains:
The secret lies with a chemical factor produced by muscle cells during work (such as during weight lifting) that signals muscle stem cells to multiply and take on the load. The substance, serum response factor (Srf), apparently triggers muscle stem cells — dormant cells capable of differentiating into muscle cells — to proliferate and become muscle fibers. More muscle fibers means bigger overall muscles and more strength.
A researcher in France called this “unexpected and quite interesting.” Gym rats can hope that what works in mice will also work in men (women, too).
Eye stash: Speaking of stem cells, there’s a good source of adult stem cells right in your eye, reported PhysOrg.
In the future, patients in need of perfectly matched neural stem cells may not need to look any further than their own eyes. Researchers reporting in the January issue of Cell Stem Cell, a Cell Press publication, have identified adult stem cells of the central nervous system in a single layer of cells at the back of the eye.
Amazingly, these cells are produced in the embryo and remain dormant throughout life; therefore, “You can get these cells from a 99-year-old,” a researcher at the Neural Stem Cell Institute in New York. The cells can be isolated and grown into other body cell types. “It’s kind of mind boggling.”….
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