1
|
Zhang KH, Jiao L, Wang Y, Sun SC. Arf6 GTPase deficiency leads to porcine oocyte quality decline during aging. FASEB J 2024; 38:e23739. [PMID: 38884157 DOI: 10.1096/fj.202400893r] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2024] [Revised: 05/21/2024] [Accepted: 05/29/2024] [Indexed: 06/18/2024]
Abstract
Arf6 is a member of ADP-ribosylation factor (Arf) family, which is widely implicated in the regulation of multiple physiological processes including endocytic recycling, cytoskeletal organization, and membrane trafficking during mitosis. In this study, we investigated the potential relationship between Arf6 and aging-related oocyte quality, and its roles on organelle rearrangement and cytoskeleton dynamics in porcine oocytes. Arf6 expressed in porcine oocytes throughout meiotic maturation, and it decreased in aged oocytes. Disruption of Arf6 led to the failure of cumulus expansion and polar body extrusion. Further analysis indicated that Arf6 modulated ac-tubulin for meiotic spindle organization and microtubule stability. Besides, Arf6 regulated cofilin phosphorylation and fascin for actin assembly, which further affected spindle migration, indicating the roles of Arf6 on cytoskeleton dynamics. Moreover, the lack of Arf6 activity caused the dysfunction of Golgi and ER for protein synthesis and signal transduction. Mitochondrial dysfunction was also observed in Arf6-deficient porcine oocytes, which was supported by the increased ROS level and abnormal membrane potential. In conclusion, our results reported that insufficient Arf6 was related to aging-induced oocyte quality decline through spindle organization, actin assembly, and organelle rearrangement in porcine oocytes.
Collapse
Affiliation(s)
- Kun-Huan Zhang
- College of Animal Science and Technology, Nanjing Agricultural University, Nanjing, China
| | - Le Jiao
- College of Animal Science and Technology, Nanjing Agricultural University, Nanjing, China
| | - Yue Wang
- College of Animal Science and Technology, Nanjing Agricultural University, Nanjing, China
| | - Shao-Chen Sun
- College of Animal Science and Technology, Nanjing Agricultural University, Nanjing, China
| |
Collapse
|
2
|
Zhang K, Zou Y, Shan M, Pan Z, Ju J, Liu J, Ji Y, Sun S. Arf1 GTPase Regulates Golgi-Dependent G2/M Transition and Spindle Organization in Oocyte Meiosis. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2024; 11:e2303009. [PMID: 38014604 PMCID: PMC10811507 DOI: 10.1002/advs.202303009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/10/2023] [Revised: 09/18/2023] [Indexed: 11/29/2023]
Abstract
ADP-ribosylation factor 1 (Arf1) is a small GTPase belonging to the Arf family. As a molecular switch, Arf1 is found to regulate retrograde and intra-Golgi transport, plasma membrane signaling, and organelle function during mitosis. This study aimed to explore the noncanonical roles of Arf1 in cell cycle regulation and cytoskeleton dynamics in meiosis with a mouse oocyte model. Arf1 accumulated in microtubules during oocyte meiosis, and the depletion of Arf1 led to the failure of polar body extrusion. Unlike mitosis, it finds that Arf1 affected Myt1 activity for cyclin B1/CDK1-based G2/M transition, which disturbed oocyte meiotic resumption. Besides, Arf1 modulated GM130 for the dynamic changes in the Golgi apparatus and Rab35-based vesicle transport during meiosis. Moreover, Arf1 is associated with Ran GTPase for TPX2 expression, further regulating the Aurora A-polo-like kinase 1 pathway for meiotic spindle assembly and microtubule stability in oocytes. Further, exogenous Arf1 mRNA supplementation can significantly rescue these defects. In conclusion, results reported the noncanonical functions of Arf1 in G2/M transition and meiotic spindle organization in mouse oocytes.
Collapse
Affiliation(s)
- Kun‐Huan Zhang
- College of Animal Science and TechnologyNanjing Agricultural UniversityNanjing210095China
| | - Yuan‐Jing Zou
- College of Animal Science and TechnologyNanjing Agricultural UniversityNanjing210095China
| | - Meng‐Meng Shan
- College of Animal Science and TechnologyNanjing Agricultural UniversityNanjing210095China
| | - Zhen‐Nan Pan
- College of Animal Science and TechnologyNanjing Agricultural UniversityNanjing210095China
| | - Jia‐Qian Ju
- College of Animal Science and TechnologyNanjing Agricultural UniversityNanjing210095China
| | - Jing‐Cai Liu
- College of Animal Science and TechnologyNanjing Agricultural UniversityNanjing210095China
| | - Yi‐Ming Ji
- College of Animal Science and TechnologyNanjing Agricultural UniversityNanjing210095China
| | - Shao‐Chen Sun
- College of Animal Science and TechnologyNanjing Agricultural UniversityNanjing210095China
| |
Collapse
|
3
|
Gao J, Zhang L, Du H, Dong Y, Zhen S, Wang C, Wang Q, Yang J, Zhang P, Zheng X, Li Y. An ARF24-ZmArf2 module influences kernel size in different maize haplotypes. JOURNAL OF INTEGRATIVE PLANT BIOLOGY 2023. [PMID: 36866706 DOI: 10.1111/jipb.13473] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/18/2022] [Accepted: 02/28/2023] [Indexed: 06/19/2023]
Abstract
Members of the ADP-ribosylation factor family, which are GTP-binding proteins, are involved in metabolite transport, cell division, and expansion. Although there has been a significant amount of research on small GTP-binding proteins, their roles and functions in regulating maize kernel size remain elusive. Here, we identified ZmArf2 as a maize ADP-ribosylation factor-like family member that is highly conserved during evolution. Maize zmarf2 mutants showed a characteristic smaller kernel size. Conversely, ZmArf2 overexpression increased maize kernel size. Furthermore, heterologous expression of ZmArf2 dramatically elevated Arabidopsis and yeast growth by promoting cell division. Using expression quantitative trait loci (eQTL) analysis, we determined that ZmArf2 expression levels in various lines were mainly associated with variation at the gene locus. The promoters of ZmArf2 genes could be divided into two types, pS and pL, that were significantly associated with both ZmArf2 expression levels and kernel size. In yeast-one-hybrid screening, maize Auxin Response Factor 24 (ARF24) is directly bound to the ZmArf2 promoter region and negatively regulated ZmArf2 expression. Notably, the pS and pL promoter types each contained an ARF24 binding element: an auxin response element (AuxRE) in pS and an auxin response region (AuxRR) in pL, respectively. ARF24 binding affinity to AuxRR was much higher compared with AuxRE. Overall, our results establish that the small G-protein ZmArf2 positively regulates maize kernel size and reveals the mechanism of its expression regulation.
Collapse
Affiliation(s)
- Jie Gao
- State Key Laboratory of Wheat and Maize Crop Science, Henan Maize Engineering Technology Joint Center, College of Agronomy, and Center for Crop Genome Engineering, Longzi Lake Campus, Henan Agricultural University, Zhengzhou, 450046, China
| | - Long Zhang
- State Key Laboratory of Wheat and Maize Crop Science, Henan Maize Engineering Technology Joint Center, College of Agronomy, and Center for Crop Genome Engineering, Longzi Lake Campus, Henan Agricultural University, Zhengzhou, 450046, China
| | - Haonan Du
- State Key Laboratory of Wheat and Maize Crop Science, Henan Maize Engineering Technology Joint Center, College of Agronomy, and Center for Crop Genome Engineering, Longzi Lake Campus, Henan Agricultural University, Zhengzhou, 450046, China
| | - Yongbin Dong
- State Key Laboratory of Wheat and Maize Crop Science, Henan Maize Engineering Technology Joint Center, College of Agronomy, and Center for Crop Genome Engineering, Longzi Lake Campus, Henan Agricultural University, Zhengzhou, 450046, China
| | - Sihan Zhen
- Institute of Crop Sciences, Chinese Academy of Agricultural Sciences, Beijing, 100081, China
| | - Chen Wang
- State Key Laboratory of Wheat and Maize Crop Science, Henan Maize Engineering Technology Joint Center, College of Agronomy, and Center for Crop Genome Engineering, Longzi Lake Campus, Henan Agricultural University, Zhengzhou, 450046, China
| | - Qilei Wang
- State Key Laboratory of Wheat and Maize Crop Science, Henan Maize Engineering Technology Joint Center, College of Agronomy, and Center for Crop Genome Engineering, Longzi Lake Campus, Henan Agricultural University, Zhengzhou, 450046, China
| | - Jingyu Yang
- State Key Laboratory of Wheat and Maize Crop Science, Henan Maize Engineering Technology Joint Center, College of Agronomy, and Center for Crop Genome Engineering, Longzi Lake Campus, Henan Agricultural University, Zhengzhou, 450046, China
| | - Paifeng Zhang
- State Key Laboratory of Wheat and Maize Crop Science, Henan Maize Engineering Technology Joint Center, College of Agronomy, and Center for Crop Genome Engineering, Longzi Lake Campus, Henan Agricultural University, Zhengzhou, 450046, China
| | - Xu Zheng
- State Key Laboratory of Wheat and Maize Crop Science, Henan Maize Engineering Technology Joint Center, College of Agronomy, and Center for Crop Genome Engineering, Longzi Lake Campus, Henan Agricultural University, Zhengzhou, 450046, China
| | - Yuling Li
- State Key Laboratory of Wheat and Maize Crop Science, Henan Maize Engineering Technology Joint Center, College of Agronomy, and Center for Crop Genome Engineering, Longzi Lake Campus, Henan Agricultural University, Zhengzhou, 450046, China
| |
Collapse
|
4
|
Jiao G, Lian H, Xing J, Chen L, Du Z, Liu X. MOS mutation causes female infertility with large polar body oocytes. Gynecol Endocrinol 2022; 38:1158-1163. [PMID: 36403623 DOI: 10.1080/09513590.2022.2147158] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
The Moloney sarcoma oncogene (MOS) encodes a protein serine/threonine kinase and MOS is expressed at high levels in oocytes undergoing meiotic maturation. The MOS/MAPK pathway is normally required for the maintenance of microtubules and chromatin in a metaphasic state during the meiotic divisions. To determine the pathogenic genes in a female infertile patient due to large polar body oocytes, whole-exome sequencing was performed on the patient and available family members. We identified a novel homozygous missense mutation c.591T > G in MOS. Bioinformatics analysis showed that the mutation is harmful. These findings suggest that MOS mutation results in oocytes with a large polar body and poor embryonic development in patients. The MOS variant may regulate oocyte asymmetric division by MAPK/WAVE2/Arp2/3/actin signaling pathway. This will help to understand the comprehensive role of MOS in early human reproductive process and provide genetic markers for future genetic counseling for more individualized treatments.
Collapse
Affiliation(s)
- Guangzhong Jiao
- Department of Reproductive Medicine, the Affiliated Yantai Yuhuangding Hospital of Qingdao University, Yantai, Shandong, China
| | - Huayu Lian
- Department of Reproductive Medicine, the Affiliated Yantai Yuhuangding Hospital of Qingdao University, Yantai, Shandong, China
| | - Jinhao Xing
- Department of Reproductive Medicine, the Affiliated Yantai Yuhuangding Hospital of Qingdao University, Yantai, Shandong, China
| | - Lili Chen
- Department of Reproductive Medicine, the Affiliated Yantai Yuhuangding Hospital of Qingdao University, Yantai, Shandong, China
| | - Zhaoli Du
- Yinfeng Gene Technology Co., Ltd., Jinan, Shandong, China
| | - Xiaoyan Liu
- Department of Reproductive Medicine, the Affiliated Yantai Yuhuangding Hospital of Qingdao University, Yantai, Shandong, China
| |
Collapse
|
5
|
Zou YJ, Shan MM, Wang HH, Pan ZN, Pan MH, Xu Y, Ju JQ, Sun SC. RAB14 GTPase is essential for actin-based asymmetric division during mouse oocyte maturation. Cell Prolif 2021; 54:e13104. [PMID: 34323331 PMCID: PMC8450121 DOI: 10.1111/cpr.13104] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2021] [Revised: 06/25/2021] [Accepted: 07/15/2021] [Indexed: 12/19/2022] Open
Abstract
Objectives RAB14 is a member of small GTPase RAB family which localizes at the endoplasmic reticulum (ER), Golgi apparatus and endosomal compartments. RAB14 acts as molecular switches that shift between a GDP‐bound inactive state and a GTP‐bound active state and regulates circulation of vesicles between the Golgi and endosomal compartments. In present study, we investigated the roles of RAB14 during oocyte meiotic maturation. Materials and methods Microinjection with siRNA and exogenous mRNA for knock down and rescue, and immunofluorescence staining, Western blot and real‐time RT‐PCR were utilized for the study. Results Our results showed that RAB14 localized in the cytoplasm and accumulated at the cortex during mouse oocyte maturation, and it was also enriched at the spindle periphery. Depletion of RAB14 did not affect polar body extrusion but caused large polar bodies, indicating the failure of asymmetric division. We found that absence of RAB14 did not affect spindle organization but caused the spindle migration defects, and this might be due to the regulation on cytoplasmic actin assembly via the ROCK‐cofilin signalling pathway. We also found that RAB14 depletion led to aberrant Golgi apparatus distribution. Exogenous Myc‐Rab14 mRNA supplement could significantly rescue these defects caused by Rab14 siRNA injection. Conclusions Taken together, our results suggest that RAB14 affects ROCK‐cofilin pathway for actin‐based spindle migration and Golgi apparatus distribution during mouse oocyte meiotic maturation.
Collapse
Affiliation(s)
- Yuan-Jing Zou
- College of Animal Science and Technology, Nanjing Agricultural University, Nanjing, China
| | - Meng-Meng Shan
- College of Animal Science and Technology, Nanjing Agricultural University, Nanjing, China
| | - Hong-Hui Wang
- College of Animal Science and Technology, Nanjing Agricultural University, Nanjing, China.,WEGO Holding Company Limited, Weihai, China
| | - Zhen-Nan Pan
- College of Animal Science and Technology, Nanjing Agricultural University, Nanjing, China
| | - Meng-Hao Pan
- College of Animal Science and Technology, Nanjing Agricultural University, Nanjing, China
| | - Yi Xu
- College of Animal Science and Technology, Nanjing Agricultural University, Nanjing, China
| | - Jia-Qian Ju
- College of Animal Science and Technology, Nanjing Agricultural University, Nanjing, China
| | - Shao-Chen Sun
- College of Animal Science and Technology, Nanjing Agricultural University, Nanjing, China
| |
Collapse
|
6
|
Haploinsufficiency of ARFGEF1 is associated with developmental delay, intellectual disability, and epilepsy with variable expressivity. Genet Med 2021; 23:1901-1911. [PMID: 34113008 DOI: 10.1038/s41436-021-01218-6] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2021] [Revised: 05/05/2021] [Accepted: 05/07/2021] [Indexed: 11/08/2022] Open
Abstract
PURPOSE ADP ribosylation factor guanine nucleotide exchange factors (ARFGEFs) are a family of proteins implicated in cellular trafficking between the Golgi apparatus and the plasma membrane through vesicle formation. Among them is ARFGEF1/BIG1, a protein involved in axon elongation, neurite development, and polarization processes. ARFGEF1 has been previously suggested as a candidate gene for different types of epilepsies, although its implication in human disease has not been well characterized. METHODS International data sharing, in silico predictions, and in vitro assays with minigene study, western blot analyses, and RNA sequencing. RESULTS We identified 13 individuals with heterozygous likely pathogenic variants in ARFGEF1. These individuals displayed congruent clinical features of developmental delay, behavioral problems, abnormal findings on brain magnetic resonance image (MRI), and epilepsy for almost half of them. While nearly half of the cohort carried de novo variants, at least 40% of variants were inherited from mildly affected parents who were clinically re-evaluated by reverse phenotyping. Our in silico predictions and in vitro assays support the contention that ARFGEF1-related conditions are caused by haploinsufficiency, and are transmitted in an autosomal dominant fashion with variable expressivity. CONCLUSION We provide evidence that loss-of-function variants in ARFGEF1 are implicated in sporadic and familial cases of developmental delay with or without epilepsy.
Collapse
|
7
|
Zhou CX, Wang Y, Shi LY, Wang ZB, Ma Y, Li CR, Zhang NN, Zhang YX, Zhang F, Zhang D, Xia ZR. GTPases Arf5 and Arl2 function partially distinctly during oocyte meiosis. J Cell Biochem 2020; 122:198-208. [PMID: 32985032 DOI: 10.1002/jcb.29839] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2019] [Revised: 07/09/2020] [Accepted: 07/30/2020] [Indexed: 01/11/2023]
Abstract
Mammalian female meiosis must be tightly regulated to produce high-quality mature oocytes for subsequent regular fertilization and healthy live birth of the next generation. GTPases control many important signal pathways involved in diverse cellular activities. ADP-ribosylation factor family members (Arfs) in mice possess GTPase activities, and some members have been found to function in meiosis. However, whether other Arfs play a role in meiosis is unknown. In this study, we found that Arl2 and Arf5 are the richest among Arfs in mouse oocytes, and they are more abundant in oocytes than in granular cells. Furthermore, Arl2 and Arf5 depletion both impeded meiotic progression, but by affecting spindles and microfilaments, respectively. Moreover, Arl2 and Arf5 depletion both significantly increased regular reactive oxygen species levels and decreased mitochondrial membrane potential and autophagy, indicating that oocyte quality was damaged by Arl2 and Arf5 depletion. These results suggest that Arl2 and Arf5 are two novel essential GTPases required for oocyte meiosis and quality control.
Collapse
Affiliation(s)
- Chun-Xiang Zhou
- Drum Tower Hospital Affiliated to Medical College of Nanjing University, Nanjing, Jiangsu, China
| | - Yang Wang
- Nanjing Medical University, Nanjing, Jiangsu, China
| | - Li-Ya Shi
- Tongji University School of Medicine, Shanghai East Hospital, Shanghai, Pudong, China
| | - Zi-Bin Wang
- Nanjing Medical University, Nanjing, Jiangsu, China
| | - Yang Ma
- The Second Hospital of Changzhou, Nanjing Medical University, Changzhou, Jiangsu, China
| | - Cong-Rong Li
- Nanjing Medical University, Nanjing, Jiangsu, China
| | - Na-Na Zhang
- Nanjing Medical University, Nanjing, Jiangsu, China
| | | | - Fenli Zhang
- College of Life Sciences, Nanjing Normal University, Nanjing, Jiangsu, China
| | - Dong Zhang
- Nanjing Medical University, Nanjing, Jiangsu, China
| | | |
Collapse
|
8
|
Dor L, Shirak A, Curzon AY, Rosenfeld H, Ashkenazi IM, Nixon O, Seroussi E, Weller JI, Ron M. Preferential Mapping of Sex-Biased Differentially-Expressed Genes of Larvae to the Sex-Determining Region of Flathead Grey Mullet ( Mugil cephalus). Front Genet 2020; 11:839. [PMID: 32973865 PMCID: PMC7472742 DOI: 10.3389/fgene.2020.00839] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2020] [Accepted: 07/10/2020] [Indexed: 12/23/2022] Open
Abstract
Flathead gray mullet (Mugil cephalus) is a cosmopolitan mugilid species popular in fishery and aquaculture with an economic preference for all-female population. However, it displays neither sexual dimorphisms nor heteromorphic sex chromosomes. We have previously presented a microsatellite-based linkage map for this species locating a single sex determination region (SDR) on linkage group 9 (LG9) with evidence for XX/XY sex determination (SD) mechanism. In this work, we refine the critical SDR on LG9, and propose positional- and functional- candidate genes for SD. To elucidate the genetic mechanism of SD, we assembled and compared male and female genomic sequences of 19 syntenic genes within the putative SDR on mullet's LG9, based on orthology to tilapia's LG8 (tLG8) physical map. A total of 25 sequence-based markers in 12 genes were developed. For all markers, we observed association with sex in at least one of the two analyzed M. cephalus full-sib families, but not in the wild-type population. Recombination events were inferred within families thus setting the SDR boundaries to a region orthologous to ∼0.9 Mbp with 27 genes on tLG8. As the sexual phenotype is evident only in adults, larvae were assigned into two putative sex-groups according to their paternal haplotypes, following a model of XY/XX SD-system. A total of 107 sex-biased differentially expressed genes in larvae were observed, of which 51 were mapped to tLG8 (48% enrichment), as compared to 5% in random control. Furthermore, 23 of the 107 genes displayed sex-specific expression; and 22 of these genes were positioned to tLG8, indicating 96% enrichment. Of the 27 SDR genes, BCCIP, DHX32A, DOCK1, and FSHR (GTH-RI) are suggested as positional and functional gene candidates for SD.
Collapse
Affiliation(s)
- Lior Dor
- Institute of Animal Science, Agricultural Research Organization, Bet Dagan, Israel
- Robert H. Smith Faculty of Agriculture, Food and Environment, The Hebrew University of Jerusalem, Rehovot, Israel
| | - Andrey Shirak
- Robert H. Smith Faculty of Agriculture, Food and Environment, The Hebrew University of Jerusalem, Rehovot, Israel
| | - Arie Y. Curzon
- Institute of Animal Science, Agricultural Research Organization, Bet Dagan, Israel
- Robert H. Smith Faculty of Agriculture, Food and Environment, The Hebrew University of Jerusalem, Rehovot, Israel
| | - Hana Rosenfeld
- National Center for Mariculture, Israel Oceanographic and Limnological Research, Eilat, Israel
| | - Iris M. Ashkenazi
- National Center for Mariculture, Israel Oceanographic and Limnological Research, Eilat, Israel
| | - Oriya Nixon
- National Center for Mariculture, Israel Oceanographic and Limnological Research, Eilat, Israel
| | - Eyal Seroussi
- Institute of Animal Science, Agricultural Research Organization, Bet Dagan, Israel
| | - Joel I. Weller
- Institute of Animal Science, Agricultural Research Organization, Bet Dagan, Israel
| | - Micha Ron
- Institute of Animal Science, Agricultural Research Organization, Bet Dagan, Israel
| |
Collapse
|
9
|
Wang YS, Jiao XF, Chen F, Wu D, Ding ZM, Miao YL, Huo LJ. WDR62 is a novel participator in spindle migration and asymmetric cytokinesis during mouse oocyte meiotic maturation. Exp Cell Res 2019; 387:111773. [PMID: 31836472 DOI: 10.1016/j.yexcr.2019.111773] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2019] [Revised: 12/08/2019] [Accepted: 12/09/2019] [Indexed: 01/08/2023]
Abstract
In female meiosis, oocyte meiotic maturation is a form of asymmetric cell division, producing the first polar body and a large oocyte, in which the asymmetry of oocyte meiotic division depends on spindle migration and positioning, and cortical polarization. In this study, we conclude that WDR62 (WD40-repeat protein 62) plays an important role in asymmetric meiotic division during mouse oocyte maturation. Our initial study demonstrated that WDR62 mainly co-localized with chromosomes during mouse oocyte meiotic maturation. Interference of Wdr62 by siRNA microinjection did not affect germinal vesicle breakdown (GVBD) but compromised the first polar body extrusion (PBE) with the large polar bodies generated, which is coupled with a higher incidence of spindle abnormality and chromosome misalignment. Further analysis concluded that loss of WDR62 blocked asymmetric spindle positioning and actin cap formation, which should be responsible for large polar body extrusion. Moreover, WDR62 decline intervened with the Arp2/3 complex, an upstream regulator for the cortical actin. Besides for p-MAPK, a critical regulator for the asymmetric division of oocyte, WDR62-depleted oocytes showed perturbation only in localization pattern but not expression level. In summary, our study defines WDR62 as an essential cytoskeletal regulator of spindle migration and asymmetric division during mouse oocyte meiotic maturation.
Collapse
Affiliation(s)
- Yong-Sheng Wang
- Key Laboratory of Agricultural Animal Genetics, Breeding and Reproduction of Ministry of Education, College of Animal Science and Technology, Huazhong Agricultural University, Wuhan, 430070, Hubei, China; Department of Hubei Province Engineering Research Center in Buffalo Breeding and Products, Wuhan, 430070, Hubei, China
| | - Xiao-Fei Jiao
- Key Laboratory of Agricultural Animal Genetics, Breeding and Reproduction of Ministry of Education, College of Animal Science and Technology, Huazhong Agricultural University, Wuhan, 430070, Hubei, China; Department of Hubei Province Engineering Research Center in Buffalo Breeding and Products, Wuhan, 430070, Hubei, China
| | - Fan Chen
- Key Laboratory of Agricultural Animal Genetics, Breeding and Reproduction of Ministry of Education, College of Animal Science and Technology, Huazhong Agricultural University, Wuhan, 430070, Hubei, China; Department of Hubei Province Engineering Research Center in Buffalo Breeding and Products, Wuhan, 430070, Hubei, China
| | - Di Wu
- Key Laboratory of Agricultural Animal Genetics, Breeding and Reproduction of Ministry of Education, College of Animal Science and Technology, Huazhong Agricultural University, Wuhan, 430070, Hubei, China; Department of Hubei Province Engineering Research Center in Buffalo Breeding and Products, Wuhan, 430070, Hubei, China
| | - Zhi-Ming Ding
- Key Laboratory of Agricultural Animal Genetics, Breeding and Reproduction of Ministry of Education, College of Animal Science and Technology, Huazhong Agricultural University, Wuhan, 430070, Hubei, China; Department of Hubei Province Engineering Research Center in Buffalo Breeding and Products, Wuhan, 430070, Hubei, China
| | - Yi-Liang Miao
- Key Laboratory of Agricultural Animal Genetics, Breeding and Reproduction of Ministry of Education, College of Animal Science and Technology, Huazhong Agricultural University, Wuhan, 430070, Hubei, China
| | - Li-Jun Huo
- Key Laboratory of Agricultural Animal Genetics, Breeding and Reproduction of Ministry of Education, College of Animal Science and Technology, Huazhong Agricultural University, Wuhan, 430070, Hubei, China; Department of Hubei Province Engineering Research Center in Buffalo Breeding and Products, Wuhan, 430070, Hubei, China.
| |
Collapse
|
10
|
Duan X, Sun SC. Actin cytoskeleton dynamics in mammalian oocyte meiosis†. Biol Reprod 2018; 100:15-24. [DOI: 10.1093/biolre/ioy163] [Citation(s) in RCA: 53] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2018] [Accepted: 07/11/2018] [Indexed: 12/12/2022] Open
Affiliation(s)
- Xing Duan
- College of Animal Science and Technology, Nanjing Agricultural University, Nanjing, China
| | - Shao-Chen Sun
- College of Animal Science and Technology, Nanjing Agricultural University, Nanjing, China
| |
Collapse
|
11
|
Chandrasekaran AP, Suresh B, Kim HH, Kim KS, Ramakrishna S. Concise Review: Fate Determination of Stem Cells by Deubiquitinating Enzymes. Stem Cells 2016; 35:9-16. [PMID: 27341175 DOI: 10.1002/stem.2446] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2016] [Accepted: 06/05/2016] [Indexed: 12/22/2022]
Abstract
Post-translational modification by ubiquitin molecules is a key regulatory process for stem cell fate determination. Ubiquitination and deubiquitination are the major cellular processes used to balance the protein turnover of several transcription factors that regulate stem cell differentiation. Deubiquitinating enzymes (DUBs), which facilitate the processing of ubiquitin, significantly influence stem cell fate choices. Specifically, DUBs play a critical regulatory role during development by directing the production of new specialized cells. This review focuses on the regulatory role of DUBs in various cellular processes, including stem cell pluripotency and differentiation, adult stem cell signaling, cellular reprogramming, spermatogenesis, and oogenesis. Specifically, the identification of interactions of DUBs with core transcription factors has provided new insight into the role of DUBs in regulating stem cell fate determination. Thus, DUBs have emerged as key pharmacologic targets in the search to develop highly specific agents to treat various illnesses. Stem Cells 2017;35:9-16.
Collapse
Affiliation(s)
| | - Bharathi Suresh
- Department of Pharmacology and Brain Korea 21 plus Project for Medical Science, Yonsei University College of Medicine, Seoul, South Korea
| | - Hyongbum Henry Kim
- Department of Pharmacology and Brain Korea 21 plus Project for Medical Science, Yonsei University College of Medicine, Seoul, South Korea
| | - Kye-Seong Kim
- Graduate School of Biomedical Science and Engineering, Hanyang University, Seoul, Korea.,College of Medicine, Hanyang University, Seoul, South Korea
| | - Suresh Ramakrishna
- Graduate School of Biomedical Science and Engineering, Hanyang University, Seoul, Korea.,College of Medicine, Hanyang University, Seoul, South Korea
| |
Collapse
|
12
|
Chen L, Ge ZJ, Wang ZB, Sun T, Ouyang YC, Sun QY, Sun YP. TGN38 is required for the metaphase I/anaphase I transition and asymmetric cell division during mouse oocyte meiotic maturation. Cell Cycle 2015; 13:2723-32. [PMID: 25486359 DOI: 10.4161/15384101.2015.945828] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023] Open
Abstract
The cellular functions of the trans-Golgi network protein TGN38 remain unknown. In this research, we studied the expression, localization and functions of TGN38 in the meiotic maturation of mouse oocytes. TGN38 was expressed at every stage of oocyte meiotic maturation and colocalized with γ-tubulin at metaphase I and metaphase II. The spindle microtubule disturbing agents nocodazole and taxol did not affect the colocalization of TGN38 and γ-tubulin. Depletion of TGN38 with specific siRNAs resulted in increased metaphase I arrest, accompanied with spindle assembly checkpoint activation and decreased first polar extrusion (PB1). In the oocytes that had extruded the PB1 after the depletion of TGN38, symmetric division occurred, leading to the production of 2 similarly sized cells. Moreover, the peripheral migration of metaphase I spindle and actin cap formation were impaired in TGN38-depleted oocytes. Our data suggest that TGN38 may regulate the metaphase I/anaphase I transition and asymmetric cell division in mouse oocytes.
Collapse
Affiliation(s)
- Lei Chen
- a Reproductive Medicine Center ; First Affiliated Hospital of Zhengzhou University ; Zhengzhou , Henan Province , China
| | | | | | | | | | | | | |
Collapse
|
13
|
Deubiquitinating enzymes in oocyte maturation, fertilization and preimplantation embryo development. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2014; 759:89-110. [PMID: 25030761 DOI: 10.1007/978-1-4939-0817-2_5] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Post-translational modifications of cellular proteins by ubiquitin and ubiquitin-like protein modifiers are important regulatory events involved in diverse aspects of gamete and embryo physiology including oocyte maturation, fertilization and development of embryos to term. Deubiquitinating enzymes (DUBs) regulate proteolysis by reversing ubiquitination, which targets proteins to the 26S proteasome. The ubiquitin C-terminal hydrolases (UCHs) comprise are DUBs that play a role in the removal of multi-ubiquitin chains. We review here the roles of UCHs in oocytes maturation, fertilization and development in mouse, bovine, porcine and rhesus monkeys. Oocyte UCHs contributes to fertilization and embryogenesis by regulating the physiology of the oocyte and blastomere cortex as well as oocyte spindle. Lack of UCHs in embryos reduces fertilization, while mutant embryos fail to undergo compaction and blastocyst formation. In addition to advancing our understanding of reproductive process, research on the role of deubiquitinating enzymes will allow us to better understand and treat human infertility, and to optimize reproductive performance in agriculturally important livestock species.
Collapse
|
14
|
Suzuki S, Nozawa Y, Tsukamoto S, Kaneko T, Imai H, Minami N. ING3 is essential for asymmetric cell division during mouse oocyte maturation. PLoS One 2013; 8:e74749. [PMID: 24066152 PMCID: PMC3774679 DOI: 10.1371/journal.pone.0074749] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2013] [Accepted: 08/05/2013] [Indexed: 12/27/2022] Open
Abstract
ING3 (inhibitor of growth family, member 3) is a subunit of the nucleosome acetyltransferase of histone 4 (NuA4) complex, which activates gene expression. ING3, which contains a plant homeodomain (PHD) motif that can bind to trimethylated lysine 4 on histone H3 (H3K4me3), is ubiquitously expressed in mammalian tissues and governs transcriptional regulation, cell cycle control, and apoptosis via p53-mediated transcription or the Fas/caspase-8 pathway. Thus, ING3 plays a number of important roles in various somatic cells. However, the role(s) of ING3 in germ cells remains unknown. Here, we show that loss of ING3 function led to the failure of asymmetric cell division and cortical reorganization in the mouse oocyte. Immunostaining showed that in fully grown germinal vesicle (GV) oocytes, ING3 localized predominantly in the GV. After germinal vesicle breakdown (GVBD), ING3 homogeneously localized in the cytoplasm. In oocytes where Ing3 was targeted by siRNA microinjection, we observed symmetric cell division during mouse oocyte maturation. In those oocytes, oocyte polarization was not established due to the failure to form an actin cap or a cortical granule-free domain (CGFD), the lack of which inhibited spindle migration. These features were among the main causes of abnormal symmetric cell division. Interestingly, an analysis of the mRNA expression levels of genes related to asymmetric cell division revealed that only mTOR was downregulated, and, furthermore, that genes downstream of mTOR (e.g., Cdc42, Rac1, and RhoA) were also downregulated in siIng3-injected oocytes. Therefore, ING3 may regulate asymmetric cell division through the mTOR pathway during mouse oocyte maturation.
Collapse
Affiliation(s)
- Shinnosuke Suzuki
- Laboratory of Reproductive Biology, Graduate School of Agriculture, Kyoto University, Kyoto, Japan
| | - Yusuke Nozawa
- Laboratory of Reproductive Biology, Graduate School of Agriculture, Kyoto University, Kyoto, Japan
| | - Satoshi Tsukamoto
- Laboratory Animal and Genome Sciences Section, National Institute of Radiological Sciences, Chiba, Japan
| | - Takehito Kaneko
- Institute of Laboratory Animals, Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | - Hiroshi Imai
- Laboratory of Reproductive Biology, Graduate School of Agriculture, Kyoto University, Kyoto, Japan
| | - Naojiro Minami
- Laboratory of Reproductive Biology, Graduate School of Agriculture, Kyoto University, Kyoto, Japan
- * E-mail:
| |
Collapse
|
15
|
Sun SC, Kim NH. Molecular mechanisms of asymmetric division in oocytes. MICROSCOPY AND MICROANALYSIS : THE OFFICIAL JOURNAL OF MICROSCOPY SOCIETY OF AMERICA, MICROBEAM ANALYSIS SOCIETY, MICROSCOPICAL SOCIETY OF CANADA 2013; 19:883-897. [PMID: 23764118 DOI: 10.1017/s1431927613001566] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
In contrast to symmetric division in mitosis, mammalian oocyte maturation is characterized by asymmetric cell division that produces a large egg and a small polar body. The asymmetry results from oocyte polarization, which includes spindle positioning, migration, and cortical reorganization, and this process is critical for fertilization and the retention of maternal components for early embryo development. Although actin dynamics are involved in this process, the molecular mechanism underlying this remained unclear until the use of confocal microscopy and live cell imaging became widespread in recent years. Information obtained through a PubMed database search of all articles published in English between 2000 and 2012 that included the phrases "oocyte, actin, spindle migration," "oocyte, actin, polar body," or "oocyte, actin, asymmetric division" was reviewed. The actin nucleation factor actin-related protein 2/3 complex and its nucleation-promoting factors, formins and Spire, and regulators such as small GTPases, partitioning-defective/protein kinase C, Fyn, microRNAs, cis-Golgi apparatus components, myosin/myosin light-chain kinase, spindle stability regulators, and spindle assembly checkpoint regulators, play critical roles in asymmetric cell division in oocytes. This review summarizes recent findings on these actin-related regulators in mammalian oocyte asymmetric division and outlines a complete signaling pathway.
Collapse
Affiliation(s)
- Shao-Chen Sun
- College of Animal Science and Technology, Nanjing Agricultural University, Nanjing 210095, China.
| | | |
Collapse
|
16
|
Dalton CM, Carroll J. Biased inheritance of mitochondria during asymmetric cell division in the mouse oocyte. J Cell Sci 2013; 126:2955-64. [PMID: 23659999 DOI: 10.1242/jcs.128744] [Citation(s) in RCA: 106] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
A fundamental rule of cell division is that daughter cells inherit half the DNA complement and an appropriate proportion of cellular organelles. The highly asymmetric cell divisions of female meiosis present a different challenge because one of the daughters, the polar body, is destined to degenerate, putting at risk essential maternally inherited organelles such as mitochondria. We have therefore investigated mitochondrial inheritance during the meiotic divisions of the mouse oocyte. We find that mitochondria are aggregated around the spindle by a dynein-mediated mechanism during meiosis I, and migrate together with the spindle towards the oocyte cortex. However, at cell division they are not equally segregated and move instead towards the oocyte-directed spindle pole and are excluded from the polar body. We show that this asymmetrical inheritance in favour of the oocyte is not caused by bias in the spindle itself but is dependent on an intact actin cytoskeleton, spindle-cortex proximity, and cell cycle progression. Thus, oocyte-biased inheritance of mitochondria is a variation on rules that normally govern organelle segregation at cell division, and ensures that essential maternally inherited mitochondria are retained to provide ATP for early mammalian development.
Collapse
Affiliation(s)
- Caroline M Dalton
- Department of Cell and Developmental Biology, Division of Biosciences, University College London, Gower Street, London, WC1E 6BT
| | | |
Collapse
|
17
|
Maddox AS, Azoury J, Dumont J. Polar body cytokinesis. Cytoskeleton (Hoboken) 2012; 69:855-68. [PMID: 22927361 DOI: 10.1002/cm.21064] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2012] [Accepted: 08/20/2012] [Indexed: 02/04/2023]
Abstract
Polar body cytokinesis is the physical separation of a small polar body from a larger oocyte or ovum. This maternal meiotic division shares many similarities with mitotic and spermatogenic cytokinesis, but there are several distinctions, which will be discussed in this review. We synthesize results from many different model species, including those popular for their genetics and several that are more obscure in modern cell biology. The site of polar body division is determined before anaphase, by the eccentric, cortically associated meiotic spindle. Depending on the species, either the actin or microtubule cytoskeleton is required for spindle anchoring. Chromatin is necessary and sufficient to elicit differentiation of the associated cortex, via Ran-based signaling. The midzone of the anaphase spindle serves as a hub for regulatory complexes that elicit Rho activation, and ultimately actomyosin contractile ring assembly and contraction. Polar body cytokinesis uniquely requires another Rho family GTPase, Cdc42, for dynamic reorganization of the polar cortex. This is perhaps due to the considerable asymmetry of this division, wherein the polar body and the oocyte/ovum have distinct fates and very different sizes. Thus, maternal meiotic cytokinesis appears to occur via simultaneous polar relaxation and equatorial contraction, since the polar body is extruded from the spherical oocyte through the nascent contractile ring. As such, polar body cytokinesis is an interesting and important variation on the theme of cell division.
Collapse
Affiliation(s)
- Amy Shaub Maddox
- Institut de recherche en immunology et en cancerologie (IRIC), Université de Montréal, Montréal, Quebec, Canada.
| | | | | |
Collapse
|
18
|
Actin cytoskeleton in cell polarity and asymmetric division during mouse oocyte maturation. Cytoskeleton (Hoboken) 2012; 69:727-37. [DOI: 10.1002/cm.21048] [Citation(s) in RCA: 88] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2012] [Revised: 06/18/2012] [Accepted: 06/21/2012] [Indexed: 12/22/2022]
|
19
|
Liu XJ. Polar body emission. Cytoskeleton (Hoboken) 2012; 69:670-85. [PMID: 22730245 DOI: 10.1002/cm.21041] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2012] [Revised: 05/15/2012] [Accepted: 05/21/2012] [Indexed: 12/13/2022]
Abstract
Generation of a haploid female germ cell, the egg, consists of two rounds of asymmetric cell division (meiosis I and meiosis II), yielding two diminutive and nonviable polar bodies and a large haploid egg. Animal eggs are also unique in the lack of centrioles and therefore form meiotic spindles without the pre-existence of the two dominant microtubule organizing centers (centrosomes) found in mitosis. Meiotic spindle assembly is further complicated by the unique requirement of sister chromatid mono-oriented in meiosis I. Nonetheless, the eggs appear to adopt many of the same proteins and mechanisms described in mitosis, with necessary modifications to accommodate their special needs. Unraveling these special modifications will not only help understanding animal reproduction, but should also enhance our understanding of cell division in general.
Collapse
Affiliation(s)
- X Johné Liu
- Chronic Disease Program, Ottawa Hospital Research Institute, Ottawa Hospital Civic Campus, 1053 Carling Avenue, Ottawa, K1Y 4E9, Canada.
| |
Collapse
|
20
|
Mtango NR, Sutovsky M, Vandevoort CA, Latham KE, Sutovsky P. Essential role of ubiquitin C-terminal hydrolases UCHL1 and UCHL3 in mammalian oocyte maturation. J Cell Physiol 2012; 227:2022-9. [PMID: 21751213 DOI: 10.1002/jcp.22931] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Ubiquitin C-terminal hydrolases (UCHs) comprise a family of deubiquitinating enzymes that play a role in the removal of multi-ubiquitin chains from proteins that are posttranslationally modified by ubiquitination to be targeted for proteolysis by the 26S proteasome. The UCH-enzymes also generate free monomeric ubiquitin from precursor multi-ubiquitin chains and, in some instances, may rescue ubiquitinated proteins from degradation. This study examined the roles of two oocyte-expressed UCHs, UCHL1, and UCHL3 in murine and rhesus monkey oocyte maturation. The Uchl1 and Uchl3 mRNAs were highly expressed in GV and MII oocytes, and were associated with the oocyte cortex (UCHL1) and meiotic spindle (UCHL3). Microinjection of the UCH-family enzyme inhibitor, ubiquitin-aldehyde (UBAL) to GV oocytes prevented oocyte meiotic progression beyond metaphase I in a majority of treated oocytes and caused spindle and first polar body anomalies. Injection of antibodies against UCHL3 disrupted oocyte maturation and caused meiotic anomalies, including abnormally long meiotic spindles. A selective, cell permeant inhibitor of UCHL3, 4, 5, 6, 7-tetrachloroidan-1, 3-dione also caused meiotic defects and chromosome misalignment. Cortical granule localization in the oocyte cortex was disrupted by UBAL injected after oocyte maturation. We conclude that the activity of oocyte UCHs contributes to oocyte maturation by regulating the oocyte cortex and meiotic spindle.
Collapse
Affiliation(s)
- Namdori R Mtango
- The Fels Institute for Cancer Research and Molecular Biology, Temple University, Philadelphia, Pennsylvania, USA
| | | | | | | | | |
Collapse
|
21
|
Hu TX, Yu M, Zhao J. Comparative transcriptional analysis reveals differential gene expression between asymmetric and symmetric zygotic divisions in tobacco. PLoS One 2011; 6:e27120. [PMID: 22069495 PMCID: PMC3206072 DOI: 10.1371/journal.pone.0027120] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2011] [Accepted: 10/11/2011] [Indexed: 11/24/2022] Open
Abstract
Asymmetric cell divisions occur widely during many developmental processes in plants. In most angiosperms, the first zygotic cell division is asymmetric resulting in two daughter cells of unequal size and with distinct fates. However, the critical molecular mechanisms regulating this division remain unknown. Previously we showed that treatment of tobacco zygotes with beta-glucosyl Yariv (βGlcY) could dramatically alter the first zygotic asymmetric division to produce symmetric two-celled proembryos. In the present study, we isolated zygotes and two-celled asymmetric proembryos in vivo by micromanipulation, and obtained symmetric, two-celled proembryos by in vitro cell cultures. Using suppression-subtractive hybridization (SSH) and macroarray analysis differential gene expression between the zygote and the asymmetric and symmetric two-celled proembryos was investigated. After sequencing of the differentially expressed clones, a total of 1610 EST clones representing 685 non-redundant transcripts were obtained. Gene ontology (GO) term analysis revealed that these transcripts include those involved in physiological processes such as response to stimulus, regulation of gene expression, and localization and formation of anatomical structures. A homology search against known genes from Arabidopsis indicated that some of the above transcripts are involved in asymmetric cell division and embryogenesis. Quantitative real-time PCR confirmed the up- or down-regulation of the selected candidate transcripts during zygotic division. A few of these transcripts were expressed exclusively in the zygote, or in either type of the two-celled proembryos. Expression analyses of select genes in different tissues and organs also revealed potential roles of these transcripts in fertilization, seed maturation and organ development. The putative roles of few of the identified transcripts in the regulation of zygotic division are discussed. Further functional work on these candidate transcripts will provide important information for understanding asymmetric zygotic division, generation of apical-basal polarity and cell fate decisions during early embryogenesis.
Collapse
Affiliation(s)
- Tian-Xiang Hu
- State Key Laboratory of Hybrid Rice, College of Life Sciences, Wuhan University, Wuhan, China
| | - Miao Yu
- State Key Laboratory of Hybrid Rice, College of Life Sciences, Wuhan University, Wuhan, China
| | - Jie Zhao
- State Key Laboratory of Hybrid Rice, College of Life Sciences, Wuhan University, Wuhan, China
| |
Collapse
|
22
|
Adona PR, de Bem THC, Mesquita LG, Rochetti RC, Leal CLV. Embryonic Development and Gene Expression in Oocytes Cultured In Vitro in Supplemented Pre-Maturation and Maturation Media. Reprod Domest Anim 2011; 46:e31-8. [DOI: 10.1111/j.1439-0531.2010.01618.x] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
|
23
|
Bernhardt ML, Kim AM, O'Halloran TV, Woodruff TK. Zinc requirement during meiosis I-meiosis II transition in mouse oocytes is independent of the MOS-MAPK pathway. Biol Reprod 2010; 84:526-36. [PMID: 21076080 DOI: 10.1095/biolreprod.110.086488] [Citation(s) in RCA: 64] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023] Open
Abstract
Zinc is essential for many biological processes, including proper functioning of gametes. We recently reported that zinc levels rise by over 50% during oocyte maturation and that attenuation of zinc availability during this period could be achieved using the membrane-permeable heavy metal chelator N,N,N',N'-tetrakis(2-pyridylmethyl)ethylenediamine (TPEN). This zinc insufficiency resulted in formation of large polar bodies, failure to establish metaphase II arrest, and impaired establishment of cortical polarity. As these phenotypes resemble those of MOS null oocytes, we examined the impact of zinc insufficiency on the MOS-MAPK pathway. Reduced levels of both MOS protein and phosphorylation of MAP2K1/2 are observed in zinc-insufficient oocytes; however, these differences appear only after completion of the first meiotic division. In addition, activation of the downstream effector of the MOS pathway, MAPK3/1, is not affected by zinc insufficiency, and reduced MOS levels are observed only with the presence of TPEN after the first polar body extrusion. These data are inconsistent with the hypothesis that reduced MOS mediates the observed phenotype. Finally, MOS overexpression does not rescue the phenotype of zinc-insufficient oocytes, confirming that the observed disruption of asymmetric division and spindle abnormalities cannot be attributed to impaired MOS signaling. Zinc-insufficient oocytes do not increase maturation promoting factor (MPF) activity following the first meiotic division, and increasing MPF activity through expression of nondegradable cyclin B1 partially rescues the ability of zinc-insufficient oocytes to enter metaphase II. Although we have shown that zinc has a novel role in the meiotic cell cycle, it is not mediated through the MOS-MAPK pathway.
Collapse
Affiliation(s)
- Miranda L Bernhardt
- Department of Obstetrics and Gynecology, Feinberg School of Medicine, Northwestern University, Chicago, Illinois, USA
| | | | | | | |
Collapse
|
24
|
Abstract
The mammalian oocyte possesses powerful reprogramming factors, which can reprogram terminally differentiated germ cells (sperm) or somatic cells within a few cell cycles. Although it has been suggested that use of oocyte-derived transcripts may enhance the generation of induced pluripotent stem cells, the reprogramming factors in oocytes are undetermined, and even the identified proteins composition of oocytes is very limited. In the present study, 7,000 mouse oocytes at different developmental stages, including the germinal vesicle stage, the metaphase II (MII) stage, and the fertilized oocytes (zygotes), were collected. We successfully identified 2,781 proteins present in germinal vesicle oocytes, 2,973 proteins in MII oocytes, and 2,082 proteins in zygotes through semiquantitative MS analysis. Furthermore, the results of the bioinformatics analysis indicated that different protein compositions are correlated with oocyte characteristics at different developmental stages. For example, specific transcription factors and chromatin remodeling factors are more abundant in MII oocytes, which may be crucial for the epigenetic reprogramming of sperm or somatic nuclei. These results provided important knowledge to better understand the molecular mechanisms in early development and may improve the generation of induced pluripotent stem cells.
Collapse
|
25
|
Hu J, Wang F, Yuan Y, Zhu X, Wang Y, Zhang Y, Kou Z, Wang S, Gao S. Novel importin-alpha family member Kpna7 is required for normal fertility and fecundity in the mouse. J Biol Chem 2010; 285:33113-33122. [PMID: 20699224 DOI: 10.1074/jbc.m110.117044] [Citation(s) in RCA: 57] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Abstract
Nuclear importing system and nuclear factors play important roles in mediating nuclear reprogramming and zygotic gene activation. However, the components and mechanisms that mediate nuclearly specific targeting of the nuclear proteins during nuclear reprogramming and zygotic gene activation remain largely unknown. Here, we identified a novel member of the importin-α family, AW146299(KPNA7), which is predominantly expressed in mouse oocytes and zygotes and localizes to the nucleus or spindle. Mutation of Kpna7 gene caused reproductivity reduction and sex imbalance by inducing preferential fetal lethality in females. Parthenogenesis analysis showed that the cell cycle of activated one-cell embryos is loss of control and ahead of schedule but finally failed to develop into blastocyst stage. Further RT-PCR and epigenetic modification analysis showed that knocking out of Kpna7 induced abnormalities of gene expression (dppa2, dppa4, and piwil2) and epigenetic modifications (down-regulation of histone H3K27me3). Biochemical analysis showed that KPNA7 interacts with KPNB1 (importin-β1). In summary, we identified a novel Kpna7 gene that is required for normal fertility and fecundity.
Collapse
Affiliation(s)
- Jianjun Hu
- From the National Institute of Biological Sciences, Beijing 102206, China
| | - Fengchao Wang
- From the National Institute of Biological Sciences, Beijing 102206, China
| | - Ye Yuan
- From the National Institute of Biological Sciences, Beijing 102206, China
| | - Xiaoquan Zhu
- From the National Institute of Biological Sciences, Beijing 102206, China
| | - Yixuan Wang
- From the National Institute of Biological Sciences, Beijing 102206, China
| | - Yu Zhang
- From the National Institute of Biological Sciences, Beijing 102206, China
| | - Zhaohui Kou
- From the National Institute of Biological Sciences, Beijing 102206, China
| | - Shufang Wang
- From the National Institute of Biological Sciences, Beijing 102206, China
| | - Shaorong Gao
- From the National Institute of Biological Sciences, Beijing 102206, China.
| |
Collapse
|
26
|
Hu J, Wang F, Zhu X, Yuan Y, Ding M, Gao S. Mouse ZAR1-like (XM_359149) colocalizes with mRNA processing components and its dominant-negative mutant caused two-cell-stage embryonic arrest. Dev Dyn 2009; 239:407-24. [DOI: 10.1002/dvdy.22170] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023] Open
|