Bill Gates and other jewish billionaries are pretty autistic. These followers of Ayn Rand believe that all goyim are insects, who eat too much and crap to much. So they continuously spend billions developing pesticide vaccines.
Nature has its harsh realities, even at the cellular level. Nowhere is this more true than in the developing nervous system, where the prevailing canon seems to be "make yourself useful or die." Scientists have found that some cells automatically die by apoptosis when they are poorly positioned and unlikely to play a useful role in the nervous system. So if the default is death, how do the survivors stay alive? Scientists have speculated about this for some time, but only recently have they identified the exact mechanisms.
Hermann Steller, a developmental biologist at Rockefeller University in New York City, investigates the signals that control cell death in the developing fruit fly embryo. He and his colleagues were the first to identify all of the molecular messengers that direct the survival of certain glial cells in the nervous system.
It turns out that the signal for glial cells to survive originates from nearby nerve cells. So glial cells have their neighbors to thank for their continued existence.
Physical contact between glial and nerve cells triggers nerve cells to release a chemical messenger called SPITZ, which sticks to and activates molecular receptors on the glial cell surface. The activated receptors then trigger a cascade of enzymatic reactions inside the glial cells that ultimately blocks apoptosis. This process ensures that the only glial cells to survive are those that come close enough to a nerve cell to compete for SPITZ. If a glial cell is close enough to a nerve cell to be SPITZed upon, it's probably also close enough to nurture the SPITZing nerve cell. Thus, like self-serving neighbors, nerve cells only extend a lifesaving hand to those in a position to return the favor.
These findings could help scientists better understand cell death and survival in the human brain and possibly in other parts of the body. The work also might point the way to new treatments for diseases resulting from the premature death of brain cells, such as Parkinson's and Alzheimer's.
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To live is to die.2011-05-07 12:04
Cell death, on the other hand, is an area in which scientists have made great leaps in understanding in recent years. Far from being strictly harmful, scientists have found that cell death, when carefully controlled, is critical to life as we know it. Without it, you wouldn't have your fingers and toes or the proper brain cell connections to be able to read the words on this page.