The smooth muscle cell. II. Growth of smooth muscle in culture and formation of elastic fibers.
Smooth muscle derived from the inner media and intima of immature guinea pig aorta were grown for up to 8 wk in cell culture. The cells maintained the morphology of smooth muscle at all phases of their growth in culture. After growing to confluency, they grew in multiple overlapping layers. By 4 wk in culture, microfibrils (110 A) appeared within the spaces between the layers of cells. Basement membrane-like material also appeared adjacent to the cells. Analysis of the microfibrils showed that they have an amino acid composition similar to that of the microfibrillar protein of the intact elastic fiber. These investigations coupled with the radioautographic observations of the ability of aortic smooth muscle to synthesize and secrete extracellular proteins demonstrate that this cell is a connective tissue synthetic cell.
D000596:Amino Acids / Q000032:analysis; D000818:Animals; D001011:Aorta / Q000166:cytology* / Q000378:metabolism; D001485:Basement Membrane; D003238:Connective Tissue / Q000378:metabolism*; D003239:Connective Tissue Cells; D003470:Culture Media; D046508:Culture Techniques; D004547:Elastic Tissue / Q000166:cytology*; D004721:Endoplasmic Reticulum; D006168:Guinea Pigs; D006651:Histocytochemistry; D002479:Inclusion Bodies; D008854:Microscopy, Electron; D008858:Microscopy, Phase-Contrast; D008928:Mitochondria; D009124:Muscle Proteins / Q000096:biosynthesis*; D009130:Muscle, Smooth / Q000166:cytology*; D009210:Myofibrils / Q000032:analysis; D013997:Time Factors
D000596:Amino Acids; D003470:Culture Media; D009124:Muscle Proteins