8/25/2023 0 Comments Definition of stemThe ability of stem cells to proliferate and to differentiate into specialized cell types makes them potentially useful for the repair and replacement of damaged and diseased tissues, see THERAPEUTIC CLONING. Hence it seems that they are capable of being genetically reprogrammed. However, adult stem cells appear to have the potential to generate specialized cells of another tissue under appropriate conditions, for example cells from bone marrow generating cells resembling NEURONS and other cell types found in the brain. An adult stem cell is an undifferentiated cell occurring in differentiated tissue, such as that of BONE MARROW, BRAIN, SKELETAL MUSCLE, LIVER, SKIN, PANCREAS or the BLOOD, with the capacity to yield specialized cell types of the tissue of origin. they are ‘pluripotent’, but they do not have identical properties. Embryonic stem cells and germ cells have the potential to differentiate into almost any or all of the cell types of the body i.e. An embryonic germ cell derives from foetal cells destined to be reproductive cells (see GERM LINE). This group of cells can be removed and cultured into embryonic stem cells. An embryonic stem cell derives from a group of cells, the inner cell mass, from a 4–5 day old embryo, called a BLASTOCYST. the stalk that supports a leaf, flower, or fruit. Send us feedback about these examples.Medical Dictionary for the Health Professions and Nursing © Farlex 2012 stem cell a special kind of cell from an EMBRYO, FOETUS or adult, capable of renewing itself under certain conditions, and of becoming specialized cells that make up the different TISSUES and ORGANS of the body A stem cell remains largely undifferentiated and uncommitted to a specific function, until it receives a signal to develop into a specialized cell (see CELL DIFFERENTIATION). 1 stem show ipa See synonyms for stem on noun the ascending axis of a plant, whether above or below ground, which ordinarily grows in an opposite direction to the root or descending axis. These examples are programmatically compiled from various online sources to illustrate current usage of the word 'stem cell.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. 2023 That discovery has led to a handful of cases in which people living with HIV have possibly been cured with a stem cell transplant from naturally resistant donors. Adela Suliman, Washington Post, 18 Mar. 2022 Treatment can include a combination of chemotherapy, radiation therapy and bone marrow or stem cell transplants. 2023 Moreover, other sectors, such as healthcare and biotech, have found expert committees-in the U.S., they’re called institutional review boards-to be the best way to deal with ethical dilemmas in hospitals, stem cell research, and scientific laboratories. 2023 The experiment shows off the power of stem cell research for morphing into human tissue all while highlighting the interaction between technology and the human body. 2023 As scientists sustained embryos in artificial wombs for increasing periods of time, stem cell research was forced to confront the ambiguity of when a human life, with its corollary rights, begins. Ana Marie Cox, The New Republic, 3 Apr. 2023 But the right no longer recognizes that kind of moral calculus, and the legal framework to undermine it emerged at the same time, pushed forward by the same people who seemed so reasonable about stem cell research. 2023 Bone marrow, stem cell, or organ transplants People who receive a bone marrow, stem cell,4 or organ transplant will also have a weakened immune system during the first few weeks after the procedure because the body’s white blood cell count is depleted, increasing the risk of potential infection. Recent Examples on the Web According to new research, this was done by manipulating the chromosomes of a male stem cell, turning it into a female egg cell.
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