Angiogenesis is a hallmark of the malignant process in breast cancer in which vascular endothelial growth factor A (VEGFA) plays an important role. Trichorhinophalangeal syndrome type 1 (TRPS1) is a GATA-type transcription factor and is involved in trichorhinophalangeal syndrome type 1. To investigate the role of TRPS1 in breast cancer angiogenesis, we analyzed the expression of TRPS1 and microvessel density (MVD) marker CD31 by immunohistochemistry in 117 paraffin-embedded breast tissues. TRPS1 expression was positively correlated with CD31. We further investigated whether TRPS1induces human umbilical vein endothelial cell (HUVEC) migration and VEGFA expression of breast cancer cells. The over-expression of TRPS1 induced a significant increase in HUVEC migration accompanied by VEGFA up-regulation in transfected cells. In contrast, knockdown of TRPS1 decreased the induction of HUVEC migration and significantly down-regulated VEGFA expression. Furthermore, endogenous TRPS1 was present in the VEGFA promoter, as determined by chromatin immunoprecipitation assay. Taken together, this study showed that TRPS1 promotes angiogenesis and affects VEGFA expression in breast cancer.
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