stem cell

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stem cell

1. any precursor cell;
2. a cell with daughter cells that may differentiate into other cell types.
3. a cell capable of maintaining its own number while exporting progeny to one or more cell lineages.

stem cell

n.
An unspecialized cell that can give rise to one or more different types of specialized cells, such as blood cells and nerve cells. Stem cells are present in embryos and in various tissues of adult organisms and are widely used in scientific research.

stem cell

(stem sel)
1. Any precursor cell.
2. A cell with daughter cells that may differentiate into other cell types.

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). An embryonic stem cell derives from a group of cells, the inner cell mass, from a 4–5 day old embryo, called a BLASTOCYST. This group of cells can be removed and cultured into embryonic stem cells. An embryonic germ cell derives from foetal cells destined to be reproductive cells (see GERM LINE). 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. they are ‘pluripotent’, but they do not have identical properties. 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. 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. Hence it seems that they are capable of being genetically reprogrammed. The 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.

Stem cell

Undifferentiated cell that retains the ability to develop into any one of numerous cell types.

stem cell

(stem sel)
1. Any precursor cell.
2. Cell with daughter cells that may differentiate into other cell types.
References in periodicals archive ?
Only a handful of patients have undergone the stem cell surgery and Paul, a council housing office worker, has been told to expect a very painful six to eight weeks in hospital with no guarantee of recovery.
"Just because you can do something doesn't mean you should," Noel told them about the last-ditch stem cell surgery that could help Ivor accept his new implant and save his precious third leg.
After several sessions of chemotherapy and radiography, Christopher Scott, 33, made the decision to go through with the stem cell surgery, after being diagnosed with Hodgkin's lymphoma.
The 11-year-old has been sidelined since landing the Grade 1 Champion Chase at Down Royal nearly ten months ago, after which he was diagnosed with heat in his off-fore leg which required stem cell surgery.
London, Aug 6 (ANI): An 11-year-old British boy has become the first child in the world to undergo a pioneering stem cell surgery, which helped him grow a new windpipe.
This is the newborn baby set to give the gift of life to his big brother following groundbreaking stem cell surgery on the other side of the world.
But at 43, experimental stem cell surgery fully restored the sight of his right eye.
And if Ailis, from Kildress, Co Tyrone, could get the treatment then she could have the vital stem cell surgery she needs to kick her cancer into touch for good.