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This 8 page paper argues that stem cells are vital, useful medical tools and funding for further research should be supplied immediately. Bibliography lists 6 sources.
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8 pages (~225 words per page)
File: D0_HVStmCll.rtf
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provide such medical benefits that research should be funded and encouraged. Discussion Stem cell research holds out the promise that conditions that are now deemed incurable or chronic can be
cured, or at least managed. In one study, monkeys that suffered from a "Parkinsons disease-like disorder" began to improve after they received human-brain stem cell transplants (Vastag, 2007, p. 45).
The monkeys that received the treatment began walking and eating again; but "their untreated companions continued to degenerate" (Vastag, 2007, p. 45). The disease impairs its victims when "neurons that
produce the nerve-signal transmitter dopamine die off" (Vastag, 2007, p. 45). When researchers tried to correct the condition by implanting "fully mature dopamine-producing neurons" into Parkinsons sufferers, they found that
the cells "sometimes produced too much of the chemical, causing spasms" (Vastag, 2007, p. 45). In hopes of solving that problem, a medical team from Yale University School of Medicine
"deployed immature brain stem cells collected from fetuses" (Vastag, 2007, p. 45). These cells "have the potential to mature" into all brain-cell types, including those that produce dopamine (Vastag, 2007,
p. 45). Presumably if the cells mature slowly they will not overproduce the chemical. In order to cause Parkinsons symptoms in the first place, researchers injected a toxin into the
monkeys brains, then transplanted "3 million cells into the brains of five of the monkeys" (Vastag, 2007, p. 45). They discovered that while some of the transplanted cells did begin
producing dopamine, most of them "grew into astrocytes, which are cells that nourish and support neurons" (Vastag, 2007, p. 45). These extra cells, according to researchers, "orchestrated a protect-and-repair effort
that jump-started the innate healing capabilities of the monkeys brains" (Vastag, 2007, p. 45). The astrocytes "apparently secreted growth factors that stopped nerve damage, boosted blood vessel growth, and prompted
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