Evidence against involvement of the acid lysosomal sphingomyelinase in the tumor-necrosis-factor- and interleukin-1-induced sphingomyelin cycle and cell proliferation in human fibroblasts.

Abstract excerpt

The hydrolysis of sphingomyelin (SPM) has been reported to mediate a number of responses to extracellular agents, including cytokines. The so-called SPM cycle may result from the activation of different types of sphingomyelinases (SPMases). We investigated the hypothetical contribution of acid lysosomal SPMase in the SPM signal-transduction pathway. We examined the ability of human skin fibroblasts with a genetic...

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