CXCR4 and squamous cell carcinoma: Expression profiling of CXCR4 transcript was done by semiquantitative RT-PCR in eight CC cell lines (HeLa, SiHa, ME-180, C-33A, CaSki, C-4I, MS751, and SW756), 63 (60 squamous cell carcinomas and 3 adenosquamous) primary tumor biopsies, and 30 normal cervical tissue samples.