title: Regulation of bcl-2 proto-oncogene expression during normal human lymphocyte proliferation.
abstract: The bcl-2 and c-myc proto-oncogenes are brought into juxtaposition with the immunoglobulin heavy chain locus in particular B-cell lymphomas, resulting in high levels of constitutive accumulation of their messenger RNAs. Precisely how the products of the bcl-2 and c-myc genes contribute to tumorigenesis is unknown, but observations that c-myc expression is rapidly induced in nonneoplastic lymphocytes upon stimulation of proliferation raise the possibility that this proto-oncogene is involved in the control of normal cellular growth. In addition to c-myc, the bcl-2 proto-oncogene also was expressed in normal human B and T lymphocytes after stimulation with appropriate mitogens. Comparison of the regulation of the expression of these proto-oncogenes demonstrated marked differences and provided evidence that, in contrast to c-myc, levels of bcl-2 messenger RNA are regulated primarily through transcriptional mechanisms.
mesh_terms: D001798:Blood Proteins / Q000096:biosynthesis / Q000187:drug effects; D003513:Cycloheximide / Q000494:pharmacology; D005786:Gene Expression Regulation / Q000187:drug effects*; D006801:Humans; D007376:Interleukin-2 / Q000494:pharmacology; D007700:Kinetics; D008213:Lymphocyte Activation / Q000187:drug effects*; D010835:Phytohemagglutinins / Q000494:pharmacology; D000090063:Proto-Oncogene Mas; D011519:Proto-Oncogenes / Q000187:drug effects*; D012333:RNA, Messenger / Q000097:blood / Q000187:drug effects; D014158:Transcription, Genetic / Q000187:drug effects
chemical_list: D001798:Blood Proteins; D007376:Interleukin-2; C000715470:MAS1 protein, human; D010835:Phytohemagglutinins; D000090063:Proto-Oncogene Mas; D012333:RNA, Messenger; D003513:Cycloheximide