Hypertension research : official journal of the Japanese Society of Hypertension · 2003
Decreased expression of adrenomedullin during adipocyte-differentiation of 3T3-L1 cells.
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Li Yin, Totsune Kazuhito, Takeda Kazuhisa, Furuyama Kazumichi, Shibahara Shigeki, Takahashi Kazuhiro
Аннотация
Adrenomedullin (AM) is a potent vasodilator peptide which has an inhibitory action on insulin secretion. Resistin is a novel peptide specifically secreted from adipocytes, and implicated in insulin resistance. We studied the expression of AM and resistin in 3T3-L1 adipocytes and preadipocytes by Northern blot analysis and radioimmunoassay. Immunoreactive-AM was detected in the culture media of 3T3-L1 preadipocytes and adipocytes, with higher concentrations found in preadipocytes. Northern blot analysis showed that AM mRNA was expressed in 3T3-L1 preadipocytes but was undetectable in adipocytes. In contrast, resistin mRNA was expressed in 3T3-L1 adipocytes, whereas it was not detected in 3T3-L1 preadipocytes. The present study thus showed that AM expression was decreased, and resistin expression increased, during adipocyte-differentiation of 3T3-L1 cells.