BACKGROUND & AIM: To study the expression of VEGF in human breast cancer cells (MCF-7、MDA-MB-231). MATERIAL AND METHODS: The protein expression of VEGF in human breast cancer cell lines was studied by immunohistochemistry staining. Expression of VEGF mRNA in human breast cancer cell lines was determined by reverse transcriptase-polymerase chain reaction (RT-PCR) method. RESULTS: The high expression of VEGF mRNA in breast cell lines was confirmed by RT-PCR analysis and imunohistochemistry.VEGF165 and VEGF121...