PMID- 2830485 OWN - NLM STAT- MEDLINE DCOM- 19880401 LR - 20210526 IS - 0270-7306 (Print) IS - 1098-5549 (Electronic) IS - 0270-7306 (Linking) VI - 7 IP - 12 DP - 1987 Dec TI - Glucocorticoid-resistant lymphoma cell variants that contain functional glucocorticoid receptors. PG - 4211-7 AB - A mouse T-lymphosarcoma cell line stably infected with mouse mammary tumor virus (MMTV) was used as the parent line for a genetic analysis of two glucocorticoid hormone responses, hormone-induced cytolysis and stimulation of viral gene expression. Variants were selected for survival and elevated expression of MMTV proteins in the presence of the steroid. The MMTV marker provided a sensitive test for glucocorticoid receptor (GR) function in the hormone-resistant variants. This strategy resulted in the isolation of two novel types of hormone-resistant variants. One type of variant with only about 25% of the level of GR found in the parent line was resistant to the cytolytic effects of glucocorticoid but produced increased levels of MMTV gene products in response to the hormone. This variant phenotype demonstrated that the MMTV response requires fewer GR than the cytolytic response. Another variant, which required approximately 100-fold higher concentrations of hormone than the wild-type cells for both responses, apparently contained GR with altered hormone-binding properties. FAU - Rabindran, S K AU - Rabindran SK AD - Department of Pathology, University of Southern California School of Medicine, Los Angeles 90033. FAU - Danielsen, M AU - Danielsen M FAU - Stallcup, M R AU - Stallcup MR LA - eng GR - CA-01149/CA/NCI NIH HHS/United States GR - GM-36317/GM/NIGMS NIH HHS/United States PT - Journal Article PT - Research Support, Non-U.S. Gov't PT - Research Support, U.S. Gov't, P.H.S. PL - United States TA - Mol Cell Biol JT - Molecular and cellular biology JID - 8109087 RN - 0 (Glucocorticoids) RN - 0 (Glycoproteins) RN - 0 (RNA, Neoplasm) RN - 0 (RNA, Viral) RN - 0 (Receptors, Glucocorticoid) RN - 0 (Viral Proteins) RN - 7S5I7G3JQL (Dexamethasone) SB - IM MH - Animals MH - Cell Survival MH - Dexamethasone/metabolism/pharmacology MH - Drug Resistance/genetics MH - *Genetic Variation MH - Glucocorticoids/*pharmacology MH - Glycoproteins/biosynthesis MH - Lymphoma, Non-Hodgkin/*genetics/metabolism/microbiology MH - Mammary Tumor Virus, Mouse/genetics MH - Mice MH - Mutation MH - RNA, Neoplasm/analysis MH - RNA, Viral/metabolism MH - Receptors, Glucocorticoid/drug effects/genetics/*physiology MH - *T-Lymphocytes MH - Transcription, Genetic MH - Tumor Cells, Cultured MH - Viral Proteins/biosynthesis PMC - PMC368102 EDAT- 1987/12/01 00:00 MHDA- 1987/12/01 00:01 PMCR- 1987/12/01 CRDT- 1987/12/01 00:00 PHST- 1987/12/01 00:00 [pubmed] PHST- 1987/12/01 00:01 [medline] PHST- 1987/12/01 00:00 [entrez] PHST- 1987/12/01 00:00 [pmc-release] AID - 10.1128/mcb.7.12.4211-4217.1987 [doi] PST - ppublish SO - Mol Cell Biol. 1987 Dec;7(12):4211-7. doi: 10.1128/mcb.7.12.4211-4217.1987.