Title : Effects of gentamicin on sphingomyelinase activity in cultured human renal proximal tubular cells.

Pub. Date : 1987 Sep 15

PMID : 3040755






5 Functional Relationships(s)
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1 The activity of A-SMase was 16% lower in cells incubated with gentamicin as compared to control. Gentamicins sphingomyelin phosphodiesterase 1 Homo sapiens
2 Whereas Mg2+ had no effects, Triton X-100 stimulated the activity of the A-SMase in PT cells. Octoxynol sphingomyelin phosphodiesterase 1 Homo sapiens
3 The Km values for sphingomyelin using A-SMase in control cells and cells incubated with gentamicin were 0.07 X and 0.016 X 10(-7) M, respectively, whereas the Km values for sphingomyelin using N-SMase in control cells and cells incubated with gentamicin were 1.8 X and 1.5 X 10(-7) M, respectively. Sphingomyelins sphingomyelin phosphodiesterase 1 Homo sapiens
4 These findings suggest that gentamicin exerts a competitive inhibition of the A-SMase in PT cells. Gentamicins sphingomyelin phosphodiesterase 1 Homo sapiens
5 Cells incubated with gentamicin for 21 days contained 25% lower activity of A-SMase associated with the lysosomal fraction as compared to control. Gentamicins sphingomyelin phosphodiesterase 1 Homo sapiens