Effect of interleukin 1 beta on osteoblastic clone MC3T3-E1 cells.
The effect of recombinant interleukin 1 Beta (IL-1(beta)) was investigated on osteoblastic cell line MC3T3-E1 cloned from mouse calvaria. IL-1(beta) stimulated cell proliferation which increased cell number and caused dose-related stimulation of DNA synthesis, with a maximal effect at a concentration of 12.5 U/ml; suppressed alkaline phosphatase activity and collagen synthesis maximally at 0.5 and 62.5 U/ml, respectively; and increased the amount of free [3H] hydroxyproline in the cultures, but the amount was quite low. Prostaglandin E2 synthesis was also stimulated dose dependently by the presence of IL-1(beta), with a maximal increase at 2.5 U/ml, at which concentration the prostaglandin E2 level in the medium was 1.61 +/- 0.10 ng/ml. The increased prostaglandin E2 synthesis did not affect either the IL-1(beta)-mediated change in DNA or collagen synthesis or alkaline phosphatase activity. These results extend the possibility that IL-1(beta) is to act as a regulator of bone formation.
D000818:Animals; D002460:Cell Line; D002478:Cells, Cultured; D003094:Collagen / Q000096:biosynthesis; D007375:Interleukin-1 / Q000494:pharmacology*; D051379:Mice; D010006:Osteoblasts / Q000187:drug effects* / Q000502:physiology; D011453:Prostaglandins / Q000096:biosynthesis; D011994:Recombinant Proteins / Q000494:pharmacology
D007375:Interleukin-1; D011453:Prostaglandins; D011994:Recombinant Proteins; D003094:Collagen