Six-transmembrane epithelial antigen of the prostate 1 expression promotes ovarian cancer metastasis by aiding progression of epithelial-to-mesenchymal transition.
Ovarian cancer is a severe malignant tumour of the female genital organs. Six-transmembrane epithelial antigen of the prostate 1 (STEAP1) expression is correlated with the occurrence and progression of multiple cancers. Here, we assessed STEAP1 expression in ovarian cancer and explored the relationship between STEAP1 and ovarian cancer progression. We used immunohistochemistry and public databases to test STEAP1 expression in normal human ovarian tissues, benign ovarian tumours, and ovarian cancer. The expression of STEAP1 and epithelial-to-mesenchymal transition (EMT)-related genes was analysed using immunocytochemistry, quantitative reverse transcription polymerase chain reaction, and western blotting in ovarian cancer cell lines. Lentivirus was used to knockdown and overexpress STEAP1. Invasion, migration, growth, clonogenicity, and apoptosis were assessed using transwell assay, growth curve, plate clone formation assay, and flow cytometry. We used a tumour xenograft to verify the relationship between STEAP1 and in vivo ovarian cancer cell growth. Matrix metalloproteinase-2 (MMP2) and matrix metalloproteinase-9 (MMP9) activities were examined using Matrix metalloproteinase zymography assay. STEAP1 was highly expressed in the human ovarian cancer tissues and a highly invasive ovarian cancer cell line. Overexpression of STEAP1 was related to poor prognosis in ovarian cancer patients. Down-regulation of STEAP1 suppressed the invasion, migration, proliferation, clonogenicity, EMT progression in human ovarian cancer cells and xenograft tumour growth in vivo, but it enhanced apoptosis. In human ovarian cancer, the STEAP1 gene is highly expressed, and its function is correlated with human ovarian cancer cell metastasis and growth. STEAP1 may be a possible target for suppressing ovarian cancer metastasis.
['Jiao|Zhi|Z|', 'Huang|Lei|L|', 'Sun|Jiali|J|', 'Xie|Jie|J|', 'Wang|Tiantian|T|', 'Yin|Xiu|X|', 'Zhang|Haozheng|H|', 'Chen|Jie|J|']
D000818:Animals D000951:Antigens, Neoplasm D017209:Apoptosis D049109:Cell Proliferation D058750:Epithelial-Mesenchymal Transition D005260:Female D005786:Gene Expression Regulation D006801:Humans D007150:Immunohistochemistry D051379:Mice D008807:Mice, Inbred BALB C D008819:Mice, Nude D009374:Neoplasms, Experimental D010051:Ovarian Neoplasms D010088:Oxidoreductases D014407:Tumor Cells, Cultured
Ovarian cancer Six-transmembrane epithelial antigen of the prostate 1 (STEAP1) Invasion Migration Epithelial-to-mesenchymal transition (EMT)