title: Interleukin-1 increases collagen production and mRNA levels in cultured skin fibroblasts.
abstract: In the present study we show that highly purified human interleukin-1 increases collagen production nearly 2-fold and mRNA levels of type I and III collagen over 2.5-fold in cultured normal human dermal fibroblasts. To minimize the effects of transient prostaglanding E2 production in fibroblasts treated with interleukin-1, the cell cultures were preincubated for 24 h before these measurements were made. The effects of interleukin-1 were also tested on scleroderma fibroblasts exhibiting increased collagen production. Although collagen synthesis was stimulated by interleukin-1 to some degree, the cells grown from both affected and unaffected skin areas were found to be relatively unresponsive to the effects of interleukin-1, suggesting a role for this monokine in the earlier stages of the disease process. The results also suggest that interleukin-1 has a role in stimulation of collagen synthesis under certain normal and pathological conditions in addition to stimulating fibroblast proliferation.
mesh_terms: D002478:Cells, Cultured; D003094:Collagen / Q000096:biosynthesis* / Q000235:genetics; D005786:Gene Expression Regulation / Q000187:drug effects; D006801:Humans; D007375:Interleukin-1 / Q000494:pharmacology*; D011347:Procollagen / Q000096:biosynthesis / Q000235:genetics; D012333:RNA, Messenger / Q000235:genetics; D012595:Scleroderma, Systemic / Q000378:metabolism; D012867:Skin / Q000378:metabolism*
chemical_list: D007375:Interleukin-1; D011347:Procollagen; D012333:RNA, Messenger; D003094:Collagen