Differentially expressed plasma microRNAs in premature ovarian failure patients and the potential regulatory function of mir-23a in granulosa cell apoptosis.
Recent studies implicate the regulatory function of microRNAs (miRNAs) in oocyte maturation and ovarian follicular development. Differentially expressed miRNAs are found in the plasma of premature ovarian failure (POF) patients and normal cycling women. In this study, miRNA-regulated signaling pathways and related genes were described using Gene Ontology (GO) analysis and Kyoto Encyclopedia of Genes and Genomes pathway analysis. The effect of mir-23a on granulosa cell apoptosis was also studied by examining the protein expression of X-linked inhibitor of apoptosis protein (XIAP) and caspase-3, followed by subsequent counting of apoptotic cells after Hoechst 33258 staining. Both GO analysis and pathway analysis suggested that many signaling pathways, including the AKT signaling pathway, steroid hormone receptor signaling pathways, and others, were regulated by this group of differentially expressed miRNAs. A decrease in XIAP expression (mRNA and protein level) and caspase-3 protein levels and an increase in cleaved caspase-3 protein were observed in human ovarian granulosa cells transfected with pre-mir-23a, along with an increased occurrence of apoptosis. In conclusion, differentially expressed miRNAs in the plasma of POF patients may have regulatory effects on proliferation and apoptosis of granulosa cells by affecting different signaling pathways. Mir-23a may play important roles in regulating apoptosis via decreasing XIAP expression in human ovarian granulosa cells.
Department of Human Reproductive Medicine, Beijing Obstetrics and Gynecology Hospital, Capital Medical University, Beijing 100006, China.
Xiaokui
X
Yang
Ying
Y
Zhou
Sha
S
Peng
Liang
L
Wu
Hai-Yan
HY
Lin
Shuyu
S
Wang
Hongmei
H
Wang
D000328:Adult; D017209:Apoptosis / Q000235:genetics* / Q000502:physiology; D005260:Female; D020869:Gene Expression Profiling; D005786:Gene Expression Regulation; D053263:Gene Regulatory Networks; D006107:Granulosa Cells / Q000378:metabolism / Q000473:pathology / Q000502:physiology*; D006801:Humans; D035683:MicroRNAs / Q000097:blood* / Q000235:genetics / Q000378:metabolism / Q000502:physiology; D046228:Microarray Analysis; D016649:Primary Ovarian Insufficiency / Q000097:blood* / Q000235:genetics / Q000473:pathology; D015398:Signal Transduction / Q000235:genetics; D051636:X-Linked Inhibitor of Apoptosis Protein / Q000235:genetics / Q000378:metabolism; D055815:Young Adult
C552430:MIRN23a microRNA, human; D035683:MicroRNAs; D051636:X-Linked Inhibitor of Apoptosis Protein; C496866:XIAP protein, human