title: The reduced PDCD5 protein is correlated with the degree of tumor differentiation in endometrioid endometrial carcinoma.
abstract: Endometrial cancer is one of the most common malignancies in the female genital tract. Programmed cell death 5 (PDCD5) is a newly identified apoptosis related gene and plays an important role in the development of some human tumors. However, the expression and clinical significance of PDCD5 in endometrial cancer have not been fully elucidated. Here, we evaluated the expression of PDCD5 in endometrioid endometrial carcinoma and control endometrium by qRT-PCR, western blot and immunohistochemistry, and analyzed the associations of PDCD5 expression with clinicopathological parameters of patients. In addition, we detected the expression of PDCD5 in control endometrial glandular epithelial cells and endometrioid endometrial carcinoma-derived cell line KLE by immunocytochemistry. The results showed that PDCD5 protein mainly expressed in the cytoplasm of glandular epithelial cells and endometrial carcinoma cells, and there was a low level of PDCD5 expression in the nuclei of the above cells. Furthermore, PDCD5 protein level was significantly lower in endometrial carcinoma samples than that in control endometrium. The decreased PDCD5 expression was correlated with the tumor differentiation degree. It is clear that PDCD5 protein expression was lower in middle and low differentiated endometrial carcinoma compared with control endometrium and high differentiated endometrial carcinoma. However, there were no significant differences of PDCD5 expression between the proliferative phase and the secretory phase of control endometrium, as well as between high differentiated endometrial carcinoma and controls. The results were verified in control glandular epithelial cells and KLE cells by immunocytochemistry. Therefore, PDCD5 may play a key role in the pathogenesis of endometrial cancer and may be a novel target for diagnosis and treatment of endometrial cancer.
authors.affiliation: Department of Immunology, Shandong University School of Medicine, 44# Wenhua Xi Road, Jinan, 250012 Shandong People's Republic of China.
authors.forename: Meng
authors.initials: M
authors.lastname: Gao
authors.affiliation: Department of Immunology, Shandong University School of Medicine, 44# Wenhua Xi Road, Jinan, 250012 Shandong People's Republic of China.|Department of Clinical Laboratory Services, Linyi People's Hospital, Linyi, Shandong People's Republic of China.
authors.forename: Wei
authors.initials: W
authors.lastname: Gao
authors.affiliation: Department of Gynecology, Jinan Central Hospital Affiliated to Shandong University, Jinan, Shandong People's Republic of China.
authors.forename: Zhanying
authors.initials: Z
authors.lastname: Wang
authors.affiliation: Department of Gynecology and Obstetrics, Shandong University School of Medicine, 44# Wenhua Xi Road, Jinan, 250012 Shandong People's Republic of China.
authors.forename: Yanping
authors.initials: Y
authors.lastname: Liu
authors.affiliation: Department of Immunology, Shandong University School of Medicine, 44# Wenhua Xi Road, Jinan, 250012 Shandong People's Republic of China.
authors.forename: Yue
authors.initials: Y
authors.lastname: Li
authors.affiliation: Department of Pathology, The Fourth Hospital of Jinan City, Jinan, Shandong People's Republic of China.
authors.forename: Chao
authors.initials: C
authors.lastname: Wei
authors.affiliation: Department of Gynecology and Obstetrics, Shandong University School of Medicine, 44# Wenhua Xi Road, Jinan, 250012 Shandong People's Republic of China.
authors.forename: Yingshuo
authors.initials: Y
authors.lastname: Sun
authors.affiliation: Department of Immunology, Shandong University School of Medicine, 44# Wenhua Xi Road, Jinan, 250012 Shandong People's Republic of China.
authors.forename: Chun
authors.initials: C
authors.lastname: Guo
authors.affiliation: Department of Immunology, Shandong University School of Medicine, 44# Wenhua Xi Road, Jinan, 250012 Shandong People's Republic of China.
authors.forename: Lining
authors.initials: L
authors.lastname: Zhang
authors.affiliation: Department of Gynecology and Obstetrics, Shandong University School of Medicine, 44# Wenhua Xi Road, Jinan, 250012 Shandong People's Republic of China.
authors.forename: Zengtao
authors.initials: Z
authors.lastname: Wei
authors.affiliation: Department of Immunology, Shandong University School of Medicine, 44# Wenhua Xi Road, Jinan, 250012 Shandong People's Republic of China.
authors.forename: Xiaoyan
authors.initials: X
authors.lastname: Wang
keywords: Differentiation; Endometrial cancer; Expression; PDCD5