Immunohistochemical study of P53 protein expression in different prostate cancer Gleason grading groups

Autor: G. Y. Kudryavtsev, L. V. Kudryavtseva, L. M. Mikhaleva, Y. Y. Kudryavtseva, N. A. Solovyeva, V. A. Osipov, I. I. Babichenko
Jazyk: English<br />Russian
Rok vydání: 2020
Předmět:
Zdroj: RUDN Journal of Medicine, Vol 24, Iss 2, Pp 145-155 (2020)
Druh dokumentu: article
ISSN: 2313-0245
2313-0261
DOI: 10.22363/2313-0245-2020-24-2-145-155
Popis: Prostate cancer (PC) remains an urgent public health problem, especially in developed countries. The use of immunohistochemical research methods in addition to the morphological classification of prostate adenocarcinomas allows a more accurate diagnosis and prognosis of the disease. The aim of the study is to identify isoforms of P53 using clones of mouse antibodies (D-07 and Y5; Epitomics, USA) in prostate cancer with different proliferative activity and the degree of malignancy. Materials and Methods: The work included surgical material for prostate resection and prostatectomy, as well as biopsy specimens (56 cases in total). An immunohistochemical study was carried out with the Ki-67 marker, as well as with mouse monoclonal antibodies (D-07 and Y5) to the P53 protein, interacting with its wild and mutant isoforms. The significance of the difference in the samples was determined using the Mann-Whitney U-test, correlation relationships were determined using the Spearman coefficient. Results: Expression of P53 upon interaction with antibodies D-07 and Y5 was determined in 56.3% and 39.6%, respectively. A statistically significant direct correlation was found between the severity of P53 expression when interacting with Y5 antibodies and the degree of tumor differentiation (rs = 0.567, p 0.05), as well as between the expression level of this protein and tumor proliferative activity (rs = 0.698, p 0.05). Conclusion: Antibodies of clone D-07, interacting with both wild and mutant isoforms of P53 protein, show positive expression in adenocarcinomas of all degrees. Expression of the mutant P53 protein is most pronounced in low-differentiated carcinomas and correlates with high proliferative activity of tumor cells, which may be associated with a loss in the induction of P53-dependent apoptosis.
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