PMID- 2267138 OWN - NLM STAT- MEDLINE DCOM- 19910214 LR - 20151119 IS - 0950-9232 (Print) IS - 0950-9232 (Linking) VI - 5 IP - 11 DP - 1990 Nov TI - Increased retinoblastoma gene expression is associated with late stages of differentiation in many different cell types. PG - 1731-3 AB - The retinoblastoma (Rb) gene is a recessive oncogene or tumor-suppressor gene whose inactivation leads to the development of tumors. Recently, evidence pointing to a role for the Rb gene in the differentiation of certain human cell types has been presented. We have studied three mouse cell lineages to determine whether there is a correlation between Rb gene expression and differentiation. We find that induction of mouse erythroleukemia cell differentiation with either dimethylsulfoxide (DMSO) or hexamethylene bisacetamide (HMBA) leads to increased expression of Rb mRNA. Increased expression of Rb mRNA was also found in S2 myoblasts induced by mitogen depletion to become differentiated myotubes. In the B-cell lineage, Rb expression is low in pre-B and B cell lines but high in plasmacytomas, which represent late stages of B cell differentiation. Thus, in all three lineages (erythroid, muscle, and B-cell) late stages of differentiation are associated with increased amounts of Rb mRNA. FAU - Coppola, J A AU - Coppola JA AD - Department of Biology, Princeton University, New Jersey 08544-1014. FAU - Lewis, B A AU - Lewis BA FAU - Cole, M D AU - Cole MD LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - England TA - Oncogene JT - Oncogene JID - 8711562 RN - 0 (Acetamides) RN - 0 (RNA, Messenger) RN - LA133J59VU (hexamethylene bisacetamide) RN - YOW8V9698H (Dimethyl Sulfoxide) SB - IM MH - Acetamides/pharmacology MH - Animals MH - B-Lymphocytes/metabolism/pathology MH - Cell Differentiation/drug effects MH - Dimethyl Sulfoxide/pharmacology MH - Embryo, Mammalian MH - *Gene Expression MH - Genes, Retinoblastoma/*genetics MH - Kinetics MH - Leukemia, Erythroblastic, Acute/metabolism/pathology MH - Mice MH - Muscles/cytology/metabolism MH - Phosphorylation MH - Plasmacytoma/metabolism MH - RNA, Messenger/biosynthesis/genetics MH - Tumor Cells, Cultured EDAT- 1990/11/01 00:00 MHDA- 1990/11/01 00:01 CRDT- 1990/11/01 00:00 PHST- 1990/11/01 00:00 [pubmed] PHST- 1990/11/01 00:01 [medline] PHST- 1990/11/01 00:00 [entrez] PST - ppublish SO - Oncogene. 1990 Nov;5(11):1731-3.