hematopoiesis


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hematopoiesis

 [he″mah-to-poi-e´sis]
the formation and development of blood cells. In the embryo and fetus it takes place in a variety of sites including the liver, spleen, thymus, lymph nodes, and bone marrow; from birth throughout the rest of life it is mainly in the bone marrow with a small amount occurring in lymph nodes. Called also hematogenesis, hemogenesis, and hemopoiesis.
extramedullary hematopoiesis the formation and development of blood cells outside the bone marrow, as in the spleen, liver, and lymph nodes.

he·mo·poi·e·sis

(hē'mō-poy-ē'sis),
The process of formation and development of the various types of blood cells and other formed elements.Synonym(s): hematosis (1)
[hemo- + G. poiēsis, a making]

hematopoiesis

/he·ma·to·poi·e·sis/ (-poi-e´sis) the formation and development of blood cells.
extramedullary hematopoiesis  that occurring outside the bone marrow, as in the spleen, liver, and lymph nodes.

hematopoiesis

(hē′mə-tō-poi-ē′sĭs, hĭ-măt′ə-) also

hemopoiesis

(hē′mə-poi-ē′sĭs)
n.
The formation of blood or blood cells in the body.

he′ma·to·poi·et′ic (-ĕt′ĭk) adj.

hematopoiesis

[hē′mətōpō·ē′sis, hem′-]
Etymology: Gk, haima + poiein, to make
the normal formation and development of blood cells in the bone marrow. In severe anemia and other hematologic disorders, cells may be produced in organs outside the marrow (extramedullary hematopoiesis). See also erythropoiesis. hematopoietic, adj.

he·mo·poi·e·sis

(hē'mō-poy-ē'sis)
The process of formation and development of the various types of blood cells and other formed elements.
Synonym(s): hematogenesis, hematopoiesis, hemogenesis, sanguification, haemopoiesis.
[hemo- + G. poiēsis, a making]

he·mo·poi·e·sis

(hē'mō-poy-ē'sis)
Process of formation and development of various types of blood cells and other formed elements.
Synonym(s): hematopoiesis, hematosis (1) , haemopoiesis.
[hemo- + G. poiēsis, a making]

hematopoiesis (hē´mətō´poiē´sis),

n the normal formation and development of blood cells in the bone marrow.

hematopoiesis

the formation and development of blood cells, usually taking place in the bone marrow.

cyclic hematopoiesis of collies
see canine cyclic hematopoiesis.
hematopoiesis depression
a significant finding in cases of endotoxemia.
extramedullary hematopoiesis
the formation of and development of blood cells outside the bone marrow, as in the spleen, liver and lymph nodes.
fetal hematopoiesis
in embryogenesis migration of stem cells from the yolk sac blood islands sets up hematopoiesis in thymus, lymph nodes, liver and spleen. When fetal bone develops a marrow cavity hematopoiesis is similarly established. At birth hematopoiesis is largely medullary.
regenerative hematopoiesis
increased hematopoietic activity in response to a need for more cells; indicated by the presence of a higher than normal proportion of immature forms in the peripheral blood.
References in periodicals archive ?
Free iron catalyzes oxidative damage to hematopoietic cells/mesenchymal stem cells in vitro and suppresses hematopoiesis in iron overload patients.
More studies are recommended to demonstrate the cellular mechanism of ghrelin in stimulating hematopoiesis and its effect on bone marrow microenvoirnment.
The role of selected miRNAs in hematopoiesis has been reported in previous studies and is summarized in table 1 according to TargetScan and miRBase online websites.
With birth, hematopoiesis naturally transitions from fetal liver to bone marrow and the GATA1 megakaryoblastic clone becomes quiescent.
The most common sites of extramedullary hematopoiesis are the liver, spleen and lymph nodes.
Hematopoietic Inducing Agents (HIAs) such as the cytokine erythropoietin (EPO) and granulocyte-colony stimulating factor (GCSF) play a vital role in hematopoiesis and are capable of inducing the proliferation of stem cells.
Clinical usefulness of In-111 chloride and Tc-99m Sn colloid scintigraphy in the diagnosis of intrathoracic extramedullary hematopoiesis.
Extramedullary hematopoiesis in a child with hereditary spherocytosis: an uncommon cause of an adrenal mass.
Moroy, who is also Director of the Hematopoiesis and Cancer research unit at the IRCM and corresponding author of the study said.
He said that the FSH hormone for treating infertility, PTH hormone for treating the parathyroid gland and bone disorders, PegGcss drug for hematopoiesis after chemotherapy, Etanercept drug for treating swollen joints and Leuprolide drug for treating prostate cancer and in some cases in treating infertility will also be unveiled on Tuesday.
Studies identifying hematopoietic stem cells (HSC) - which form blood and immune cells - and progenitors, have made hematopoiesis one of the best systems for studying the molecular changes in cell fate decision-making and creation of cancer.
In rare cases, melanin and extramedullary hematopoiesis may be seen.