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B Cell Leukemia Research Paper

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B-cell Leukemia/Lymphoma 2 is a special type of proto-oncogene found on chromosome 18. Its product is an integral membrane protein (called BCL-2) located in the membrane of the Endoplasmic Reticulum (ER), the nuclear envelope, and in the outer membranes of the Mitochondria. The gene was discovered as a trans located locus in B-cell Leukemia, and found also in most B-cell Lymphomas. In the cancerous B-cells, the amount of chromosome 18 holding the BCL-2 locus has undergone a reciprocal translocation with the portion of chromosome 14, holding the antibody heavy chain locus. This (14; 18) translocation places the BCL-2 gene close to the heavy chain gene enhancer.
This enhancer is active in the B cells- whose job is to synthesize large amounts of the antibody-. So it is not very surprising to discover that the BCL-2 protein is expressed at high levels in these T (14; 18) cells.

B-cells, like all activated lymphocytes, die after they have done their jobs. This makes sure they do not linger after the threat has …show more content…
Cells in apoptosis show typical morphological characteristics, such as cell volume decrease, folds in the cytoplasmic membrane, condensation and fragmentation of DNA, maintenance of the integrity of organelles, with the shape of apoptotic bodies and posteriorly phagocytosis b/*y macrophages. This process is mainly regulated by cell signaling routes, and pro- and anti-apoptotic proteins that control the process involved. Many studies in the literature show that apoptosis deregulation is included in the pathophysiology of several nosologic entities, such as degenerative and autoimmune diseases and neoplasms. Alternations of the anti-apoptotic BCL-2 molecule were recognized to prognosis, and response to therapy in chronic lymphocytic leukemia, non-Hodgkin lymphoma, and acute myeloid

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