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  • Title: [Comparative studies on the biological significance of the marker for proliferation Ki-67-Antigen and PCNA in primary ovarian carcinoma].
    Author: Reitmaier M, Rudlowski C, Biesterfeld S, Rath W, Schröder W.
    Journal: Zentralbl Gynakol; 2000; 122(7):361-7. PubMed ID: 10951706.
    Abstract:
    OBJECTIVE: It was shown in experimental and clinical investigations, that the biological behavior of malignant tumors is reflected by their proliferative activity. PCNA and Ki-67-Antigen are two nuclear antigens and considered to represent important markers of proliferation. We investigated their proliferation index in primary ovarian carcinomas and correlated the results with tumor stage, grading, histological type and survival. MATERIAL AND METHODS: The expression of PCNA and Ki-67-Antigen was immunohistochemically evaluated using the monoclonal antibodies MIB-1 and PC 10 on formalin-fixed, paraffin-embedded tissue of 49 patients. Statistical data were calculated by means of Fisher's Exact Test and Pearson's Chi 2 Test, survival was estimated by Kaplan Meier Curves. RESULTS: PCNA-expression was shown in all ovarian carcinomas and Ki-67-Antigen-expression was detected with one exception (98%) in all tumors, too. No correlation could be found between Ki-67-Antigen-expression and the prognostic factors mentioned above, whereas a high PCNA-expression was significantly correlated with the tumor grading (G3), (p < 0.05). Patients with ovarian carcinomas with high PCNA proliferation index showed the tendency of a shorter overall survival. DISCUSSION: Ki-67-Antigen and PCNA-expression could be detected in almost all primary ovarian carcinomas. PCNA compared to Ki-67-Antigen is considered to be more useful for the determination of the proliferative activity of ovarian carcinomas, although there was shown just a tendency of overall survival dependent on PCNA-expression, and there was a significant correlation only between PCNA-proliferation index and tumor grading.
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