Bone Morphogenetic Protein-12 and -13 Inhibit Terminal Differentiation of Myoblasts, but Do Not Induce Their Differentiation into Osteoblasts
1996
Abstract Effects of bone morphogenetic protein (BMP)-12 and BMP-13, new members of the BMP family which belong to the transforming growth factor (TGF)-β superfamily, on terminal differentiation of myoblasts were examined in C2C12 and L-6 myoblasts. When the myoblasts were cultured with BMP-12 or BMP-13, the expression of the myosin heavy chain and the formation of multinucleated myotubes mRNA in L-6 cells. The inhibitory effects of BMP-12 and BMP-13 on myogenic differentiation were similar to the effects of BMP-2, though their potencies were lower than BMP-2. Unlike BMP-2, neither BMP-12 nor BMP-13 induced alkaline phosphatase activity in C2C12 myoblasts. The differences in the biological activities of these new BMPs suggest that the intracellular signalling pathway used by BMP-12 and BMP-13 differs from that of BMP-2.
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