Anti-IL1 beta/IL1B Antibody Fluoro647 Conjugated

Interleukin-1β (IL-1β) is a potent stimulator of bone resorption whose gene is mapped to 2q14, and has been implicated in the pathogenesis of high bone turnover and osteoporosis. IL-1β, a prominent microglia-derived cytokine, caused oligodendrocyte death in coculture with astrocytes and microglia, but not in pure culture of oligodendrocytes alone. It also can cause nuclear export of a specific NCOR corepressor complex, resulting in derepression of a specific subset of nuclear factor-kappa-B (NFKB) -regulated genes. Furthermore, Microenvironmental IL-1β and, to a lesser extent, IL-1α are required for in vivo angiogenesis and invasiveness of different tumor cells. Additional, the cooperation of IL-1β and PDGFB induces contractile-to-synthetic phenotype modulation of human aortic smooth muscle cells in culture. Moreover, the association with disease may be explained by the biologic properties of IL-1β, which is an important proinflammatory cytokine and a powerful inhibitor of gastric acid secretion.

A synthetic peptide corresponding to a sequence at the C-terminus of rat IL-1 beta, different from the related human sequence by five amino acids, and from the related mouse sequence by one amino acid.

Produced by activated macrophages, IL-1 stimulates thymocyte proliferation by inducing IL-2 release, B-cell maturation and proliferation, and fibroblast growth factor activity. IL-1 proteins are involved in the inflammatory response, being identified as endogenous pyrogens, and are reported to stimulate the release of prostaglandin and collagenase from synovial cells.

1. Baek, S. H.; Ohgi, K. A.; Rose, D. W.; Koo, E. H.; Glass, C. K.; Rosenfeld, M. G. : Exchange of N-CoR corepressor and Tip60 coactivator complexes links gene expression by NF-kappa-B and beta-amyloid precursor protein. Cell 110: 55-67, 2002. 2. Chen, C.-N.; Li, Y.-S. J.; Yeh, Y.-T.; Lee, P.-L.; Usami, S.; Chien, S.; Chiu, J.-J. : Synergistic roles of platelet-derived growth factor-BB and interleukin-1-beta in phenotypic modulation of human aortic smooth muscle cells. Proc. Nat. Acad. Sci. 103: 2665-2670, 2006. 3. Takahashi, J. L.; Giuliani, F.; Power, C.; Imai, Y.; Yong, V. W. : Interleukin-1-beta promotes oligodendrocyte death through glutamate excitotoxicity. Ann. Neurol. 53: 588-595, 2003. 4. Voronov, E.; Shouval, D. S.; Krelin, Y.; Cagnano, E.; Benharroch, D.; Iwakura, Y.; Dinarello, C. A.; Apte, R. N. : IL-1 is required for tumor invasiveness and angiogenesis. Proc. Nat. Acad. Sci. 100: 2645-2650, 2003.

Secreted. The lack of a specific hydrophobic segment in the precursor sequence suggests that IL-1 is released by damaged cells or is secreted by a mechanism differing from that used for other secretory proteins.