title: BMP-4 treatment of C3H10T1/2 stem cells blocks expression of MMP-3 and MMP-13.
abstract: Microarray gene expression profiling was used to identify bone morphogenetic protein-4 (BMP-4) responsive factors involved in late stages of adipocyte commitment in C3H10T1/2 cells. The analysis revealed that the matrix metalloproteinase-3 (MMP-3) gene decreased 100-fold after BMP-4 treatment, and expression of MMP-13 decreased 19.5-fold. Uncommitted C3H10T1/2 cells exhibit dramatic up-regulation of MMP-3 and MMP-13 genes as cells become confluent. Real-time RT-PCR demonstrated that BMP-4 blocks expression of both transcripts. Likewise, a stable committed preadipocyte line derived from C3H10T1/2 cells did not express MMP-3 or MMP-13 at confluence, despite never receiving BMP-4. Active forms of both proteins were detected in media from confluent C3H10T1/2 cells but not in BMP-4 treated cells. Addition of BMP-4 to confluent C3H10T1/2 cells repressed the expression of both genes but did not induce adipocyte differentiation. The findings indicate that BMP-4-induced down-regulation of MMP-3 and MMP-13 is associated with commitment, but is insufficient to induce adipogenesis.
authors.affiliation: Department of Biological Chemistry, Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA.
authors.forename: Tamara C
authors.initials: TC
authors.lastname: Otto
authors.forename: Robert R
authors.initials: RR
authors.lastname: Bowers
authors.forename: M Daniel
authors.initials: MD
authors.lastname: Lane
mesh_terms: D041721:3T3-L1 Cells; D017667:Adipocytes / Q000166:cytology / Q000187:drug effects / Q000378:metabolism; D000818:Animals; D055415:Bone Morphogenetic Protein 4; D019485:Bone Morphogenetic Proteins / Q000494:pharmacology*; D002454:Cell Differentiation / Q000235:genetics; D002460:Cell Line; D004591:Electrophoresis, Polyacrylamide Gel; D053595:Embryonic Stem Cells / Q000166:cytology / Q000187:drug effects* / Q000378:metabolism; D015870:Gene Expression / Q000187:drug effects; D020869:Gene Expression Profiling; D015151:Immunoblotting; D053509:Matrix Metalloproteinase 13 / Q000235:genetics* / Q000378:metabolism; D019278:Matrix Metalloproteinase 3 / Q000235:genetics* / Q000378:metabolism; D051379:Mice; D020411:Oligonucleotide Array Sequence Analysis; D020133:Reverse Transcriptase Polymerase Chain Reaction; D013997:Time Factors; D014158:Transcription, Genetic / Q000187:drug effects; D015854:Up-Regulation / Q000187:drug effects
chemical_list: C525810:Bmp4 protein, mouse; D055415:Bone Morphogenetic Protein 4; D019485:Bone Morphogenetic Proteins; D053509:Matrix Metalloproteinase 13; D019278:Matrix Metalloproteinase 3