PMID- 8194491 OWN - NLM STAT- MEDLINE DCOM- 19940628 LR - 20061115 IS - 0013-7227 (Print) IS - 0013-7227 (Linking) VI - 134 IP - 6 DP - 1994 Jun TI - The retinoic acid and retinoid X receptors are differentially expressed during myoblast differentiation. PG - 2658-61 AB - Retinoids (all trans and 9-cis retinoic acid) are pleiotropic regulators of cell fate, and have been shown to regulate the expression of helix loop helix transcription factors (e.g MyoD, myogenin and Myf-5) that control myogenic differentiation. The effects of retinoids are mediated through the ligand dependent retinoic acid receptors (RARs) and retinoid X receptors (RXRs). We have found that the messenger RNA transcripts encoding RAR are repressed during differentiation of C2C12 myoblasts while, conversely, RXR mRNA transcripts are induced in C2C12 myotubes. These results imply that RXRs, play a major regulatory role in differentiated muscle. FAU - Downes, M AU - Downes M AD - University of Queensland, Centre for Molecular Biology and Biotechnology, Ritchie Research Laboratories, St. Lucia, Australia. FAU - Mynett-Johnson, L AU - Mynett-Johnson L FAU - Muscat, G E AU - Muscat GE LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - United States TA - Endocrinology JT - Endocrinology JID - 0375040 RN - 0 (RNA, Messenger) RN - 0 (Receptors, Cytoplasmic and Nuclear) RN - 0 (Receptors, Retinoic Acid) RN - 0 (Retinoid X Receptors) RN - 0 (Transcription Factors) SB - IM MH - Animals MH - Blotting, Northern MH - *Cell Differentiation MH - Cell Line MH - *Gene Expression MH - Mice MH - Muscles/*cytology MH - RNA, Messenger/metabolism MH - Receptors, Cytoplasmic and Nuclear/*genetics MH - Receptors, Retinoic Acid/*genetics MH - Retinoid X Receptors MH - *Transcription Factors EDAT- 1994/06/01 00:00 MHDA- 1994/06/01 00:01 CRDT- 1994/06/01 00:00 PHST- 1994/06/01 00:00 [pubmed] PHST- 1994/06/01 00:01 [medline] PHST- 1994/06/01 00:00 [entrez] AID - 10.1210/endo.134.6.8194491 [doi] PST - ppublish SO - Endocrinology. 1994 Jun;134(6):2658-61. doi: 10.1210/endo.134.6.8194491.