BIOL 221 Lecture Notes - Lecture 1: Acute Leukemia, Chronic Leukemia, Leukopoiesis
10 Feb 2020
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Control of leukopoiesis: thymic hormones (thymosin, t cell lymphocytes, exposure to antigens stimulates lymphocyte production (topic 6) Thymic hormones (e. g. , thymosin) promote division and development of t cell lymphocytes. The exposure to antigens can also stimulate lymphocyte production. Leukopoiesis disorders: leukemia: named according to cell type involved, e. g. , myeloid leukemia, acute leukemia, comes from -blast cells, occurs more often in children, chronic leukemia, comes from later stages, more common in adults. Leukemias are cancers of wbc producing cells. They are named according to the type of cells involved. For example, myeloid leukemia is a cancer of myelocytes that eventually form granulocytes. Acute leukemiasusually come from early ( blast ) stages ( blast cells include: myeloblasts, monoblasts, and lymphoblasts). These acute leukemias are more common in children although they also occur in adults. Chronic leukemiasdevelop more slowly and generally come from later stages of leukopoiesis (later stages include: myelocytes, promonocytes, and prolymphocytes).
