Some articles on stem cell, stem cells, cell, adult stem cell, adult stem cells, cells:
... Stem cell niche refers to a microenvironment where stem cells are found, which interacts with stem cells to regulate cell fate ... The word 'niche' can be in reference to the in vivo or in vitro stem cell microenvironment ... various niche factors act on embryonic stem cells to alter gene expression, and induce their proliferation or differentiation for the development of the fetus ...
... as well as researchers specializing in adult stem cell research ... Pro-life supporters often claim that the use of adult stem cells from sources such as umbilical cord blood has consistently produced more promising results than ... Furthermore, adult stem cell research may be able to make greater advances if less money and resources were channeled into embryonic stem cell research ...
... In this point of view, they may be compared to adult stem cells ... But progenitors are said to be in a further stage of cell differentiation ... They are in the “center” between stem cells and fully differentiated cells ...
... gave rise to spermatocytes, which then differentiated into mature sperm cells in a specific cycle ... of spermatogonia, the seminiferous epithelium was shown to contain a population of stem cells which divided to produce differentiated cells as well as to maintain their ... by Leblond, "the reappearance at each cycle of a new dormant cell which acts as the stem cell of spermatocytes is described as the 'Stem Cell Renewal Theory'" ...
... is usually presented as a counter-argument to using adult stem cells as an alternative that doesn't involve embryonic destruction ... Embryonic stem cells make up a significant proportion of a developing embryo, while adult stem cells exist as minor populations within a mature individual (e.g ... in every 1,000 cells of the bone marrow, only 1 will be a usable stem cell) ...
Famous quotes containing the words cells, adult and/or stem:
“If I’d written all the truth I knew for the past ten years, about 600 people—including me—would be rotting in prison cells from Rio to Seattle today. Absolute truth is a very rare and dangerous commodity in the context of professional journalism.”
—Hunter S. Thompson (b. 1939)
“If the Russians have gone too far in subjecting the child and his peer group to conformity to a single set of values imposed by the adult society, perhaps we have reached the point of diminishing returns in allowing excessive autonomy and in failing to utilize the constructive potential of the peer group in developing social responsibility and consideration for others.”
—Urie Bronfenbrenner (b. 1917)
“All things seem mention of themselves
And the names which stem from them branch out to other referents.
Hugely, spring exists again.”
—John Ashbery (b. 1927)