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TWIST2 positively regulates POSTN expression in human fibroblasts. A. Overexpression of TWIST2 by transfection increases endogenous POSTN mRNA levels B. Conversely, RNAi mediated knockdown of TWIST2 results in decreased levels of endogenous periostin when compared to cells treated with non-targeting siRNA. Error bars represent standard error, and means significantly different from the untreated controls are delineated by asterisks (p<0.05 = *, p<0.01=**, p<0.001=***).
