[3H-thymidine incorporation into human aorta cells in primary culture. An autoradiographic study].

Primary cell culture has been obtained from intima and media of unaffected zones of human aorta and from atherosclerotic lesions (fatty infiltration, fatty streaks, atherosclerotic plaques). Cellular polymorphism was found in these cultures. Four morphological types of aortic cells are described: elongated, asymmetric, polygonal, and stellate cells. These cell types also differed in their proliferative activity. On the 7th day of culturing, polygonal cells do not incorporate 3H-thymidine; the thymidine index of other three cell types was similar. The thymidine index of medial cells was higher than that of intimal ones.