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Mol Cell Biol. 1989 March; 9(3): 959-964

Interleukin 1 and cyclic AMP induce kappa immunoglobulin light-chain expression via activation of an NF-kappa B-like DNA-binding protein.

F Shirakawa, M Chedid, J Suttles, B A Pollok and S B Mizel

Department of Microbiology and Immunology, Wake Forest University Medical Center, Winston-Salem, North Carolina 27103.

ABSTRACT

Interleukin 1 (IL-1) induces the synthesis of kappa immunoglobulin light chains and the expression of surface immunoglobulin in the murine pre-B-cell line 70Z/3 (J. G. Giri, P. W. Kincade, and S. B. Mizel, J. Immunol. 132:223-228, 1984). In the present study, we found that these effects of IL-1 are mimicked by cyclic AMP (cAMP) analogs and cAMP-elevating drugs. The induction of kappa immunoglobulin light-chain gene expression by IL-1 was associated with an increase in intracellular cAMP levels. Incubation of 70Z/3 cells with IL-1 or cAMP resulted in the activation of the kappa immunoglobulin enhancer, as detected by the induction of chloramphenicol acetyltransferase (CAT) in cells transfected with a kappa enhancer-CAT expression plasmid. In contrast, CAT plasmids lacking a kappa immunoglobulin enhancer were inactive in the presence of IL-1 or cAMP. Furthermore, IL-1 and cAMP analogs and inducers were found to induce the activation of a NF-kappa B-like DNA-binding protein that exhibited specificity for the kappa immunoglobulin enhancer. These results suggest that cAMP may play an important role as a second messenger for IL-1 in the induction of kappa immunoglobulin light-chain synthesis in pre-B cells via the activation of a DNA-binding protein that is similar or identical to NF-kappa B.


Mol Cell Biol. 1989 March; 9(3): 959-964




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