Abstract
Cinnamon (Cinnamomum verum) has been widely used in spices, flavoring agents, and preservatives. Cinnamon polyphenol extract (CPE) may be important in the alleviation of chronic diseases, but the molecular evidence is not substantial. Tristetraprolin (TTP) family proteins have anti-inflammatory effects through the destabilization of pro-inflammatory mRNAs. TTP expression is reduced in fats of obese people with metabolic syndrome and brains of suicide victims. This study used quantitative real-time PCR to explore the effects of CPE on the regulation of TTP, VEGF, and related gene expression in mouse 3T3-L1 adipocytes. CPE (100 μg/mL) increased TTP mRNA levels by up to 10-fold, and this stimulation was sustained over 16 h. The levels of VEGF mRNA, a putative target of TTP, were decreased 40-50% by CPE. It also affected the expression of other genes coding for ZFP36L1 and ZFP36L3 (TTP homologues), GM-CSF, COX2, IL6, APP, G-CSF, and PAI1. This study demonstrated that CPE rapidly induces TTP mRNA and reduces VEGF mRNA and affects the expression of a number of other genes in the cultured adipocytes.
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