title: A1, a Bcl-2 family member, prolongs cell survival and permits myeloid differentiation.
abstract: A1, a bcl-2 family member, has been identified as a hematopoietic-specific, early inducible gene. In this study it is shown that stable transfection of A1 into an interleukin-3 (IL-3)-dependent myeloid precursor cell line, 32D c13, leads to a retardation of IL-3 withdrawal-induced cell death similar to that observed with transfection of bcl-2. However, unlike bcl-2. A1 expression permits the accumulation of differentiated myeloid cells both before and after IL-3 withdrawal. Total cell accumulation, on the other hand, is considerably greater after IL-3 deprivation in the bcl-2 transfectant than in A1-expressing cells. Cells cotransfected with the two genes behave similarly to cells singly transfected with bcl-2, except that viability following IL-3 withdrawal is somewhat further enhanced. These results suggest that these two proteins have distinct roles that may be related to the divergent regulation of their expression during myeloid differentiation.
authors.affiliation: Department of Pathology, Albert Einstein College of Medicine, Bronx, NY 10467, USA.
authors.forename: E Y
authors.initials: EY
authors.lastname: Lin
authors.forename: A
authors.initials: A
authors.lastname: Orlofsky
authors.forename: H G
authors.initials: HG
authors.lastname: Wang
authors.forename: J C
authors.initials: JC
authors.lastname: Reed
authors.forename: M B
authors.initials: MB
authors.lastname: Prystowsky
mesh_terms: D000818:Animals; D017209:Apoptosis / Q000235:genetics*; D001483:Base Sequence; D002454:Cell Differentiation / Q000187:drug effects / Q000235:genetics; D002455:Cell Division / Q000187:drug effects; D002460:Cell Line; D002461:Cell Line, Transformed; D002522:Chlorocebus aethiops; D004268:DNA-Binding Proteins / Q000235:genetics / Q000502:physiology*; D016179:Granulocyte Colony-Stimulating Factor / Q000494:pharmacology; D006412:Hematopoietic Stem Cells / Q000166:cytology* / Q000187:drug effects / Q000378:metabolism; D018398:Homeodomain Proteins; D007377:Interleukin-3 / Q000494:pharmacology; D051379:Mice; D015778:Minor Histocompatibility Antigens; D008969:Molecular Sequence Data; D011518:Proto-Oncogene Proteins / Q000502:physiology; D019253:Proto-Oncogene Proteins c-bcl-2; D011993:Recombinant Fusion Proteins / Q000378:metabolism; D051818:Replication Protein C; D012097:Repressor Proteins; D029701:Saccharomyces cerevisiae Proteins; D014162:Transfection
chemical_list: C096816:BCL2-related protein A1; D004268:DNA-Binding Proteins; D018398:Homeodomain Proteins; D007377:Interleukin-3; C096063:MATA1 protein, S cerevisiae; D015778:Minor Histocompatibility Antigens; D011518:Proto-Oncogene Proteins; D019253:Proto-Oncogene Proteins c-bcl-2; D011993:Recombinant Fusion Proteins; D012097:Repressor Proteins; D029701:Saccharomyces cerevisiae Proteins; D016179:Granulocyte Colony-Stimulating Factor; D051818:Replication Protein C