Abstract
The nicotinamide analogue 6-aminonicotinamide and dibutyryl cyclic AMP inhibit myogenesis in a clonal rat cell line from skeletal muscle. Both reagents produce a similar morphological response in the cells, and stimulate collagen and glycosaminoglycan synthesis. 6-Aminonicotinamide and dibutyryl cyclic AMP may induce a phenotypic transformation of myogenic cells to cells that share many characteristics with chondrocytes.