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- W2034366810 abstract "Resistin is an adipocyte-derived hormone whose role in the development of insulin resistance is controversial. Endothelin-1 (ET-1) is a 21 amino acid peptide demonstrated to possess vasoconstrictor, positive inotropic, mitogenic, and metabolic properties. In numerous disease states, including congestive heart failure, obesity, and diabetes, elevated levels of ET-1 have been reported and are thought to contribute to the pathology of the disease. A recent study demonstrated that ET-1 induces the expression and stimulates the secretion of the adipose tissue-derived hormone leptin. However, the effect of ET-1 on resistin secretion has not been determined. To characterize the effect of ET-1 on resistin secretion, 3T3-L1 fibroblasts were differentiated into adipocytes and allowed to mature for 14 days. Cells were incubated for 24h with ET-1 (1-100 nM), insulin (1-100 nM), insulin+ET-1 (100 nM I+E) or the appropriate vehicle or antagonist. At the end of the incubation period, resistin secretion was determined in the media by immunoblotting and densitometric analysis. ET-1 (1-100 nM) significantly decreased basal resistin secretion by 49% (1 nM), 43% (10nM), and 59% (100 nM). Insulin (1-100 nM) produced a concentration-dependent increase in resistin secretion from 3T3-L1 adipocytes (1 nM-42%, 10nM-55%, and 100 nM-86% vs. control). Insulin-stimulated resistin secretion (100 nM) was almost completely inhibited (94%) by ET-1 (100 nM). The effects of ET-1 on resistin protein secretion were inhibited by co-incubation with the ET(A) receptor antagonist BQ-610. In conclusion, our studies demonstrate that basal and hormonal stimulation of resistin secretion by insulin are inhibited by ET-1. Such findings demonstrate that resistin secretion is regulated in a similar manner to other adipose tissue factors, including leptin, in 3T3-L1 adipocytes. In addition, our findings suggest that vascular factors such as ET-1 may regulate whole body energy metabolism through adipocyte-derived hormones, including leptin and resistin." @default.
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- W2034366810 date "2002-08-01" @default.
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- W2034366810 title "Endothelin-1 inhibits resistin secretion in 3T3-L1 adipocytes" @default.
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- W2034366810 doi "https://doi.org/10.1016/s0006-291x(02)00882-3" @default.
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