EXPRESSION OF MARKERS OF INTERCELLULAR ADHESION CD44 AND CD24 IN CELLS OF ENDOMETRIAL CARCINOMA WITH HIGH MALIGNANCY POTENTIAL
Nesina I.P.1, Iurchenko N.P.2, Gorlakova O.O.2, Buchynska L.G.1
- 1R.E. Kavetsky Institute of Experimental Pathology, Oncology and Radiobiology of NAS of Ukraine
- 2R.E. Kavetsky Institute of Experimental Pathology, Oncology and Radiobiology, NAS of Ukraine, Kyiv, Ukraine
Aim: to determine the expression of CD44 and CD24 proteins in samples of endometrioid carcinoma of uteri body, depending on the progression parameters of the tumor process. Object and methods: samples of the surgical material of 66 patients with endometrioid cancer (EC) with an average age of 59.7 ± 5.8 years and 13 patients with serous cancer (SC), with an average age of 63.1 ± 4.2 years. Methods: morphological, immunohistochemical, flow cytospectrometry and statistical. Results of the study showed that the number of tumors with positive expression of CD44 was 58 (87.9%) and CD24 — 95.5%). Expression of CD44 protein was significantly higher in G3 tumors (25.4 ± 2.3%) compared with G2 tumor (14.1 ± 2.0%, p < 0.05) and expression of CD24 protein in G3- and G2-tumors were almost equally high, 48.8 ± 2.7 and 47.9 ± 3.0% respectively. In EC, invasion with < ½ myometrium, the number of cells with CD44 and CD24 expression was 18.5 ± 2.4 and 52.4 ± 3.0%, respectively, and in the case of deep myometrium invasion, respectively, 21.2 ± 2.1 and 46.6 ± 3.3%. The largest number of tumors, which was deeply invasive with myometrium and with aneuploidy, had a CD44–/low/CD24high phenotype and with high index of proliferation — CD44high/CD24high or CD44–/low/CD24high phenotypes, that is, the most aggressive signs of EC were generally associated with high values of glycoprotein CD24. The frequency of SC with the CD44–/low/CD24–/low phenotype was 53.8%, CD44high/CD24high — 38.5%, CD44high/CD24–/low — 7.7%. SC with negative CD44 and positive CD24 expression were not detected. Conclusions: high expression of CD24 in EC are associated with such indicators of cancer malignancy as deep tumor invasion in myometrium, high index of proliferation of tumors сells and aneuploidy. The obtained data suggest that the adhesion molecules CD44 and CD24 can be used as markers for the progression of endometrial cancer.
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