in the present study , we found that normal human peripheral blood mononuclear leukocytes cultured in vitro and stimulated by antigens or t cell mitogens release a 100 to 170 k m.w. , heat-labile , trypsin-sensitive protein that stimulates dermal fibroblasts to produce increased quantities of type i and iii collagens .
C0086418
human
C0021756
t cell mitogens