HtrA3 Is Downregulated in Cancer Cell Lines and Significantly Reduced in Primary Serous and Granulosa Cell Ovarian Tumors
| Autor: | Ying Li, Andrew N. Stephens, Craig A. Harrison, Guiying Nie, Jyothsna Rao, Peter J. Fuller, Harmeet Singh |
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| Rok vydání: | 2013 |
| Předmět: |
Pathology
medicine.medical_specialty Stromal cell endocrine system diseases Serous cystadenocarcinoma Granulosa cell Ovary Biology 03 medical and health sciences 0302 clinical medicine medicine 030304 developmental biology 0303 health sciences Cancer protease GCT medicine.disease 3. Good health Serous fluid ovarian cancer medicine.anatomical_structure Oncology HtrA3 030220 oncology & carcinogenesis Mucinous cystadenocarcinoma Ovarian cancer Research Paper |
| Zdroj: | Journal of Cancer |
| ISSN: | 1837-9664 |
| DOI: | 10.7150/jca.5702 |
| Popis: | Objective. The high temperature requirement factor A3 (HtrA3) is a serine protease homologous to bacterial HtrA. Four human HtrAs have been identified. HtrA1 and HtrA3 share a high degree of domain organization and are downregulated in a number of cancers, suggesting a widespread loss of these proteases in cancer. This study examined how extensively the HtrA (HtrA1-3) proteins are downregulated in commonly used cancer cell lines and primary ovarian tumors. Methods. RT-PCR was applied to various cancer cell lines (n=17) derived from the ovary, endometrium, testes, breast, prostate, and colon, and different subtypes of primary ovarian tumors [granulosa cell tumors (n=19), mucinous cystadenocarcinomas (n=6), serous cystadenocarcinomas (n=8)] and normal ovary (n = 9). HtrA3 protein was localized by immunohistochemistry. Results. HtrA3 was extensively downregulated in the cancer cell lines examined including the granulosa cell tumor-derived cell lines. In primary ovarian tumors, the HtrA3 was significantly lower in serous cystadenocarcinoma and granulosa cell tumors. In contrast, HtrA1 and HtrA2 were expressed in all samples with no significant differences between the control and tumors. In normal postmenopausal ovary, HtrA3 protein was localized to lutenizing stromal cells and corpus albicans. In serous cystadenocarcinoma, HtrA3 protein was absent in the papillae but detected in the mesenchymal cyst wall. Conclusion. HtrA3 is more extensively downregulated than HtrA1-2 in cancer cell lines. HtrA3, but not HtrA1 or HtrA2, was decreased in primary ovarian serous cystadenocarcinoma and granulosa cell tumors. This study provides evidence that HtrA3 may be the most relevant HtrA associated with ovarian malignancy. |
| Databáze: | OpenAIRE |
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