Correlation of cell cycle regulatory proteins (p53 and p16ink4a) and bcl-2 oncoprotein with mitotic index and thickness of primary cutaneous malignant melanoma

  • Miloš Kostov Department of Pathology, Military hospital of Niš
  • Žaklina Mijović Institute of Pathology, Faculty of Medicine, University of Niš
  • Dragan Mihailović Institute of Pathology, Faculty of Medicine, University of Niš
  • Snežana Cerović Center for Pathology and Forensic Medicine, Military Medical of Academy Belgrade
  • Miroslav Stojanović Clinic for Surgery, Faculty of Medicine, University of Niš
  • Marija Jelić Department of Biochemistry, Military hospital of Niš
Keywords: melanoma, skin, cell cycle regulators, bcl-2, melanoma progression

Abstract

The purpose of the study was to determine the frequency of expression p53 and p16INK4a proteins and bcl2- oncoprotein in malignant skin melanoma and to determine their correlation with the proliferative index and tumor thickness. The study involved 53 patients: 27 (51%) male and 26 (49%) female. Mitotic index showed a correlation with p53 protein expression, a negative correlation with p16INK4a protein expression. Statistically significant correlations were determined between the Breslow tumor thickness, Clark invasion level and p53 protein expression, as well as Breslow tumor thickness and bcl-2 oncoprotein expression (p<0.05), whereas there was no correlation between the p16INK4a protein expression and melanoma thicknes and Clark invasion level. Overexpression p53 protein and bcl-2 oncoprotein, with the loss p16INK4a protein of expression in the nodular melanoma, confirms a frequent loss of function of these tumor suppressor gene and oncogene, and indicates a vertical tumor growth phase. The loss of tumor suppression function the p53 protein and bcl-2 oncoprotein overexpression in cutaneous melanoma correlates with larger tumor thickness, whereas the overexpression of mutated p53 protein and loss p16INK4a protein of expression indicate a higher proliferative tumour potential. Therefore, these evaluated proteins may be the aggressive biological tumour activity markers.

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Correlation of cell cycle regulatory proteins (p53 and p16ink4a) and bcl-2 oncoprotein with mitotic index and thickness of primary cutaneous malignant melanoma
Published
2010-11-20
How to Cite
1.
Kostov M, Mijović Žaklina, Mihailović D, Cerović S, Stojanović M, Jelić M. Correlation of cell cycle regulatory proteins (p53 and p16ink4a) and bcl-2 oncoprotein with mitotic index and thickness of primary cutaneous malignant melanoma. Bosn J of Basic Med Sci [Internet]. 2010Nov.20 [cited 2020Aug.9];10(4):276-81. Available from: https://bjbms.org/ojs/index.php/bjbms/article/view/2660
Section
Pathology