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Suppressive Effect of Tumor Necrosis Factor-[alpha] on Adipogenic Cell Differentiation and on Gene Expression of Hormone-Sensitive Lipase

Addition of human recombinant tumor necrosis factor-α (hrTNF) to confluent 3T3-L1 preadipocytes in the presence of differentiation inducers depressed both cellular differentiation into adipocytes and gene expression of hormone-sensitive lipase (HSL) without diminishing cellular viability. When hrTNF...

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Published in:Journal of clinical biochemistry and nutrition 1997-01, Vol.22 (1), p.1
Main Authors: SUMIDA, Michihiro, SHIOSAKA, Takahiko, NAGAI, Ayako, ISSHIKI-MASUDA, Mami, OKUDA, Hiromichi, HAMADA, Minoru
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container_title Journal of clinical biochemistry and nutrition
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creator SUMIDA, Michihiro
SHIOSAKA, Takahiko
NAGAI, Ayako
ISSHIKI-MASUDA, Mami
OKUDA, Hiromichi
HAMADA, Minoru
description Addition of human recombinant tumor necrosis factor-α (hrTNF) to confluent 3T3-L1 preadipocytes in the presence of differentiation inducers depressed both cellular differentiation into adipocytes and gene expression of hormone-sensitive lipase (HSL) without diminishing cellular viability. When hrTNF was added to 3T3-L1 cells that had differentiated into adipocytes, the cellular level of HSL mRNA was dose dependently reduced over the period of 3-12h with a concomitant reduction in HSL activity. The reducing effect of hrTNF on the HSL mRNA level was reversible. Cycloheximide (0.1mg/ml) suppressed the reducing effect of hrTNF, indicating that de novo protein synthesis is required for the hrTNF action. Actinomycin D (1μg/ml) gradually reduced the HSL mRNA level in the adipocytes over 12h without affecting the ratio of HSL mRNA to β-actin mRNA. The HSL mRNA level in primary cultures of Leydig cells was not affected by 1nM hrTNF. In addition, interleukin-1β(100nM) did not inhibit HSL gene expression when it was added to 3T3-L1 cells, regardless of their differentiation stage.
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title Suppressive Effect of Tumor Necrosis Factor-[alpha] on Adipogenic Cell Differentiation and on Gene Expression of Hormone-Sensitive Lipase
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