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Elevated HOTAIR expression promotes cisplatin resistance. (A) Relative HOTAIR expression in A549 and A549/CDDP cells; (B) overexpression of HOTAIR in A549 cells determined by PCR; (C) overexpression of HOTAIR in A549/CDDP cells determined by PCR; (D) growth rate of each group determined by MTT. Data from each group were determined in three separate experiments, and the results were expressed as mean ± SD. SD, standard deviation.
