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Endometrial adenocarcinoma (EAC) is the most frequently diagnosed gynecological cancer of the female genital tract in the Western world. Research studies in EC is difficult to conduct on human tumor samples due to the complex nature of tumor arousal and genetic heterogeneousness in the human population. Therefore, inbred animal models can be promising tools to use in EC research due to similar histopathology and pathogenesis as humans. Studies performed on MAP2K1 and CCND1 has shown that their altered expression play a crucial role in carcinogenesis. CCND1 has been demonstrated to have oncogenic properties when overexpressed in human neoplasias. The aim of this study is to investigate gene expression levels of MAP2K1 and CCND1 in BDII rat model of endometrial adenocarcinoma cells. Quantitative real-time PCR was used to analyze expression levels of MAP2K1 and CCND1 genes in BDII/Han rat model of endometrial cancer cells using TaqMan approach. The differences in gene expression levels of MAP2K1 and CCND1 between pathologically EAC malignant and nonmalignant cells showed an upregulation of MAP2K1 and CCND1 in EAC malignant cells. The analyzed data presented observable mean differences between MAP2K1 and CCND1 in several endometrial cell lines that were examined. Although no statistical significance was reached, an alteration in gene expression levels in malignant and nonmalignant endometrial cells could be observed. Furthermore, this present study shows observable upregulation of MAP2K1 and CCND1 in endometrial carcinoma cells vs. nonmalignant endometrium cells and encourages further investigation of the role of CCND1 and MAP2K genes in endometrial carcinogenesis.