Stem
cells are special human
cells that are able to develop into many different cell types. This can range from muscle
cells to
brain cells. In some cases, they can also fix damaged tissues. Researchers believe that stem cell-based therapies may one day be used to treat serious illnesses such as paralysis and
Alzheimer disease. The
embryonic stem cells used in research today come from unused embryos. These result from an in vitro fertilization procedure. They are donated to science. These
embryonic stem cells are pluripotent. This means that they can turn into more than one type of cell. There are 2 types of adult stem cells. One type comes from fully developed tissues such as the brain, skin, and bone marrow. There are only small numbers of
stem cells in these tissues. They are more likely to generate only certain types of cells. For example, a
stem cell that comes from the liver will only make more liver cells. The second type is induced pluripotent stem cells. These are adult
stem cells that have been changed in a lab to be more like embryonic stem cells. Scientists first reported that human
stem cells could be changed in this way in 2006. Induced pluripotent
stem cells don't seem to be different from embryonic stem cells, but scientists have not yet found one that can develop every kind of cell and tissue. Citations are important for a journal to get impact factor. Impact
factor is a measure reflecting the average number of citations to recent
articles published in the journal. The impact of the journal is influenced by impact factor, the
journals with high impact
factor are considered more important than those with lower ones. This information can be published in our peer reviewed journal with impact factors and are calculated using citations not only from research
articles but also review
articles (which tend to receive more citations), editorials, letters, meeting abstracts, short communications, and case reports.
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