Interleukin 1 activity in normal human urine
Kimball, E.S.; Pickeral, S.F.; Oppenheim, J.J.; Rossio, J.L.
Journal of Immunology 133(1): 256-260
1984
ISSN/ISBN: 0022-1767 PMID: 6609981 Document Number: 240581
Urine concentrations from normal individuals contained interleukin 1 (IL-1)-like activity when tested directly on human dermal fibroblasts and on C3H/HeJ mouse thymocytes in the presence of 1 .mu.g/ml phytohemagglutinin. A total of 75% of the urine samples tested, however, demonstrated the presence of a specific inhibitor of IL-1-promoted thymocyte proliferation. This inhibitor did not affect IL-2[interleukin 2]-promoted proliferation of mouse thymocytes or CT-6 [T lymphocyte] cells or IL-1-promoted proliferation of human dermal fibroblasts. After gel filtration of the urine concentrates, even those samples that were inhibitory yielded fractions containing both thymocyte and fibroblast proliferative activity. The approximate MW of these activities were 75,000 and 15,000. In addition, 2 peaks of low MW, thymocyte proliferative activity were noted at 4000 and 2000. The 2000 pool, but not the 4000 pool, also contained fibroblast proliferative activity.