PMID- 32003502 OWN - NLM STAT- MEDLINE DCOM- 20200413 LR - 20210110 IS - 1365-2184 (Electronic) IS - 0960-7722 (Print) IS - 0960-7722 (Linking) VI - 53 IP - 3 DP - 2020 Mar TI - The 5.8S pre-rRNA maturation factor, M-phase phosphoprotein 6, is a female fertility factor required for oocyte quality and meiosis. PG - e12769 LID - 10.1111/cpr.12769 [doi] LID - e12769 AB - OBJECTIVES: M-phase phosphoprotein 6 (MPP6) is important for 5.8S pre-rRNA maturation in somatic cells and was screened as a female fertility factor. However, whether MPP6 functions in oocyte meiosis and fertility is not yet known. We aimed to address this. MATERIALS AND METHODS: Mouse oocytes with surrounded nucleus (SN) or non-surrounded nucleus (NSN) were used for all experiments. Peptide nanoparticle-mediated antibody transfection was used to deplete MPP6. Immunofluorescence staining, immunohistochemistry and live tracker staining were used to examine MPP6 localization and characterize phenotypes after control or MPP6 depletion. High-fidelity PCR and fluorescence in situ hybridization (FISH) were used to examine the localization and level of 5.8S rRNAs. Western blot was used to examine the protein level. MPP6-EGFP mRNA microinjection was used to do the rescue. RESULTS: MPP6 was enriched within ovaries and oocytes. MPP6 depletion significantly impeded oocyte meiosis. MPP6 depletion increased 5.8S pre-rRNA. The mRNA levels of MPP6 and 5.8S rRNA decreased within ageing oocytes, and MPP6 mRNA injection partially increased 5.8S rRNA maturation and improved oocyte quality. CONCLUSIONS: MPP6 is required for 5.8S rRNA maturation, meiosis and quality control in mouse oocytes, and MPP6 level might be a marker for oocyte quality. CI - (c) 2020 The Authors. Cell Proliferation published by John Wiley & Sons Ltd. FAU - Peng, Rui-Rui AU - Peng RR AD - Center for Reproductive Medicine, Shandong Provincial Hospital Affiliated to Shandong University, Jinan, China. AD - State Key Lab of Reproductive Medicine, Nanjing Medical University, Nanjing, China. FAU - Wang, Li-Li AU - Wang LL AD - State Key Lab of Reproductive Medicine, Nanjing Medical University, Nanjing, China. FAU - Gao, Wen-Yi AU - Gao WY AD - State Key Lab of Reproductive Medicine, Nanjing Medical University, Nanjing, China. FAU - Zhu, Feng-Yu AU - Zhu FY AD - State Key Lab of Reproductive Medicine, Nanjing Medical University, Nanjing, China. FAU - Hu, Fan AU - Hu F AD - State Key Lab of Reproductive Medicine, Nanjing Medical University, Nanjing, China. FAU - Zeng, Wen-Tao AU - Zeng WT AD - Animal Core Facility, Nanjing Medical University, Nanjing, China. FAU - Shi, Li-Ya AU - Shi LY AD - The Second Affiliated Hospital, Nanjing Medical University, Nanjing, China. FAU - Chen, Xi-Chen AU - Chen XC AD - Analysis and Test Center, Nanjing Medical University, Nanjing, China. FAU - Cai, Jing-Yang AU - Cai JY AD - State Key Lab of Reproductive Medicine, Nanjing Medical University, Nanjing, China. FAU - Zhang, Dong AU - Zhang D AUID- ORCID: 0000-0002-0257-4441 AD - State Key Lab of Reproductive Medicine, Nanjing Medical University, Nanjing, China. AD - Animal Core Facility, Nanjing Medical University, Nanjing, China. FAU - Xia, Zheng-Rong AU - Xia ZR AD - Analysis and Test Center, Nanjing Medical University, Nanjing, China. FAU - Yang, Zhi-Xia AU - Yang ZX AD - State Key Lab of Reproductive Medicine, Nanjing Medical University, Nanjing, China. LA - eng GR - 31671561/General Program of the National Natural Science Foundation of China/ GR - NMUB2018044/Science and Technology Development Fund of Nanjing Medical University/ GR - 2017YFC1001503/National Key Research and Development Program of China/ GR - 2017NJMUZD015/Science and Technology Development Fund of Nanjing Medical University/ PT - Journal Article DEP - 20200131 PL - England TA - Cell Prolif JT - Cell proliferation JID - 9105195 RN - 0 (Cell Cycle Proteins) RN - 0 (Mphosph6 protein, mouse) RN - 0 (RNA, Ribosomal, 5.8S) RN - 0 (RNA-Binding Proteins) SB - IM MH - Animals MH - Cell Cycle Proteins/genetics/*metabolism MH - Cell Division MH - Cells, Cultured MH - Cellular Senescence MH - Female MH - Fertility MH - Fertilization in Vitro MH - Male MH - Meiosis MH - Mice MH - Mice, Inbred ICR MH - Oocytes/*cytology/metabolism/ultrastructure MH - RNA, Ribosomal, 5.8S/*metabolism MH - RNA-Binding Proteins/genetics/*metabolism PMC - PMC7106954 OTO - NOTNLM OT - 5.8S Pre-rRNA OT - M-phase phosphoprotein 6 OT - female fertility factor OT - meiosis OT - oocyte OT - quality COIS- The authors declare that they have no conflicts of interest. EDAT- 2020/02/01 06:00 MHDA- 2020/04/14 06:00 PMCR- 2020/01/31 CRDT- 2020/02/01 06:00 PHST- 2019/09/07 00:00 [received] PHST- 2019/12/07 00:00 [revised] PHST- 2020/01/04 00:00 [accepted] PHST- 2020/02/01 06:00 [pubmed] PHST- 2020/04/14 06:00 [medline] PHST- 2020/02/01 06:00 [entrez] PHST- 2020/01/31 00:00 [pmc-release] AID - CPR12769 [pii] AID - 10.1111/cpr.12769 [doi] PST - ppublish SO - Cell Prolif. 2020 Mar;53(3):e12769. doi: 10.1111/cpr.12769. Epub 2020 Jan 31.