C-X-C motif chemokine 14 precursor (Chemokine BRAK) (MIP-2G) (Small-inducible cytokine B14) [MIP2G] [NJAC] [SCYB14] [PSEC0212] [UNQ240/PRO273]
Aging of the uterine endometrium is a critical factor that affects reproductive success, but the mechanisms associated with uterine aging are unclear. In this study, we conducted a qualitative examination of age-related changes in endometrial tissues and identified candidate genes as markers for uterine aging. Gene expression patterns were assessed by two RNA sequencing experiments using uterine tissues from wild type (WT) C57BL/6 mice. Gene expression data obtained by RNA-sequencing were validated by real-time PCR. Genes expressing the pro-inflammatory cytokines Il17rb and chemokines Cxcl12 and Cxcl14 showed differential expression between aged WT mice and a group of mice composed of 5 and 8 week-old WT (young) animals. Protein expression levels of the above-mentioned genes and of IL8, which functions downstream of IL17RB, were analysed by quantitative immunohistochemistry of unaffected human endometrium tissue samples from patients in their 20 s and 40 s (10 cases each). In the secretory phase samples, 3,3'- diaminobenzidine (DAB) staining intensities of IL17RB, CXCL12 and CXCL14 for patients in their 40 s were significantly higher than that for patients in their 20 s, as detected by a Mann Whitney U test. These results suggest that these genes are candidate markers for endometrial aging and for prediction of age-related infertility, although confirmation of these findings is needed in larger studies involving fertile and infertile women.
- endometrial cell aging