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Schatten H. SQSTM1 facilitates oocyte maturation through inducing ACLY degradation mediated by selective autophagy. Cell Cycle 2023; 22:1074-1076. [PMID: 36786531 PMCID: PMC10081051 DOI: 10.1080/15384101.2023.2176673] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2022] [Revised: 11/23/2022] [Accepted: 12/19/2022] [Indexed: 02/15/2023] Open
Abstract
Selective autophagy specifically eliminates certain intracellular substrates through the autophagy pathway. Organelles and aggregation-prone proteins can be degraded through the autophagy receptor protein SQSTM1/p62, which renders them a promising therapeutic approach against infertility. He et al. demonstrate that blocking of autophagy in cumulus granulosa cells can directly attenuate citrate levels and in turn affect oocyte maturation quality. Further findings show that SQSTM1 connects K63-polyubiquitinated ACLY (ATP citrate lyase) during the process of selective autophagic degradation, which further compromises the homeostasis of citrate. Therefore, the quality of oocyte meiotic maturation can be evaluated by the levels of selective autophagy in cumulus granulosa cells.
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Affiliation(s)
- Heide Schatten
- Department of Veterinary Pathobiology, University of Missouri, Columbia, MO, USA
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Cellular and Molecular Nature of Fragmentation of Human Embryos. Int J Mol Sci 2022; 23:ijms23031349. [PMID: 35163271 PMCID: PMC8836137 DOI: 10.3390/ijms23031349] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2021] [Revised: 01/20/2022] [Accepted: 01/21/2022] [Indexed: 02/01/2023] Open
Abstract
Embryo fragmentation represents a phenomenon generally characterized by the presence of membrane-bound extracellular cytoplasm into the perivitelline space. Recent evidence supports the cellular and molecular heterogeneity of embryo fragments. In this narrative review, we described the different embryo fragment-like cellular structures in their morphology, molecular content, and supposed function and have reported the proposed theories on their origin over the years. We identified articles related to characterization of embryo fragmentation with a specific literature search string. The occurrence of embryo fragmentation has been related to various mechanisms, of which the most studied are apoptotic cell death, membrane compartmentalization of altered DNA, cytoskeletal disorders, and vesicle formation. These phenomena are thought to result in the extrusion of entire blastomeres, release of apoptotic bodies and other vesicles, and micronuclei formation. Different patterns of fragmentation may have different etiologies and effects on embryo competence. Removal of fragments from the embryo before embryo transfer with the aim to improve implantation potential should be reconsidered on the basis of the present observations
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Tilia L, Chapman M, Kilani S, Cooke S, Venetis C. Oocyte meiotic spindle morphology is a predictive marker of blastocyst ploidy-a prospective cohort study. Fertil Steril 2019; 113:105-113.e1. [PMID: 31739977 DOI: 10.1016/j.fertnstert.2019.08.070] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2019] [Revised: 08/15/2019] [Accepted: 08/23/2019] [Indexed: 01/08/2023]
Abstract
OBJECTIVE To evaluate oocyte meiotic spindle (OMS) morphology at intracytoplasmic sperm injection (ICSI) as a predictor of blastocyst ploidy and whether OMS morphology could aid standard morphology-based blastocyst selection. DESIGN Prospective cohort study. SETTING In vitro fertilization clinic. PATIENT(S) Patients undergoing ICSI cycles with an intention to perform preimplantation genetic testing for aneuploidy (PGT-A) from October 2014 to December 2017. INTERVENTION(S) The OMS was visualized with the use of polarized light microscopy at the time of ICSI and the morphology classified as normal, dysmorphic, translucent, not visible, or in telophase. Blastocyst biopsy for PGT-A was performed on embryos with suitable development. MAIN OUTCOME MEASURE(S) The association of OMS morphology with the resulting blastocyst ploidy was evaluated on an "intention-to-treat" (ITT) and an "as-treated analysis" (ATA) basis. RESULT(S) The morphology of 2,056 OMSs were classified. A strong association of OMS morphology with fertilization, cleavage to at least 6 cells on day 3, and good/top-quality blastocyst formation was present. Normal OMS was positively associated with blastocyst euploidy compared with all other OMS types combined, per either ITT or ATA. Even after controlling for female age, blastocyst quality, and developmental stage, the presence of a normal OMS was strongly associated with the probability of blastocyst euploidy. CONCLUSION(S) OMS morphology is a predictive marker of blastocyst ploidy and can potentially aid standard morphology-based blastocyst selection.
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Affiliation(s)
- Liza Tilia
- School of Women's and Children's Health, University of New South Wales, Sydney, New South Wales, Australia; IVF Australia, Sydney, New South Wales, Australia.
| | - Michael Chapman
- School of Women's and Children's Health, University of New South Wales, Sydney, New South Wales, Australia; IVF Australia, Sydney, New South Wales, Australia
| | - Suha Kilani
- School of Women's and Children's Health, University of New South Wales, Sydney, New South Wales, Australia; IVF Australia, Sydney, New South Wales, Australia
| | - Simon Cooke
- School of Women's and Children's Health, University of New South Wales, Sydney, New South Wales, Australia; IVF Australia, Sydney, New South Wales, Australia
| | - Christos Venetis
- School of Women's and Children's Health, University of New South Wales, Sydney, New South Wales, Australia; Centre for Big Data Research in Health, University of New South Wales, Sydney, New South Wales, Australia; IVF Australia, Sydney, New South Wales, Australia
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Does the meiotic spindle really predicts embryo implantation and live birth rates? An update. ZYGOTE 2018; 27:1-4. [PMID: 30516453 DOI: 10.1017/s096719941800059x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
SummaryThe aim of this study was to determine the capacity of the meiotic spindle (MS) to predict embryo implantation and live birth rates. For this purpose, we performed a broad systematic literature search. Of all publications retrieved, only those in which the implantation rates were related to some characteristics of the MS were evaluated. Despite the different methodology used in all the chosen studies, presence of the MS in oocytes was found to be positively associated with embryo implantation. Moreover, high retardance values, as well as strict criteria of normality in the MS structure, are significantly related to higher embryo implantation numbers and live birth rates.
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Sun J, Guo Y, Zhang Q, Bu S, Li B, Wang Q, Lai D. Chronic restraint stress disturbs meiotic resumption through APC/C-mediated cyclin B1 excessive degradation in mouse oocytes. Cell Cycle 2018; 17:1591-1601. [PMID: 29911914 DOI: 10.1080/15384101.2018.1471316] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
Psychological stress, which exerts detrimental effects on human reproduction, may compromise the meiotic competence of oocytes. Meiotic resumption, germinal vesicle breakdown (GVBD), is the first milestone to confer meiotic competence to oocytes. In the practice of assisted reproductive technology (ART), the timing for GVBD is associated with the rates of cleavage and blastocyst formation. However, whether chronic stress compromises oocyte competence by influencing GVBD and the underlying mechanisms are unclear. In the present study, a chronic restraint stress (CRS) mouse model was used to investigate the effects of stress on oocyte meiotic resumption, as well as the mechanisms. Following a 4-week chronic restraint stress in female mice, the percentage of abnormal bipolar spindles increased and indicated compromised oocyte competence in the CRS group. Furthermore, we identified a decreased percentage of GVBD and prolonged time of GVBD in the CRS mouse oocytes compared with the control group. CRS simultaneously reduced the expression of cyclin B1 (CCNB1), which represents a regulatory subunit of M-phase/mature promoting factor (MPF). However, MG132, an inhibitor of anaphase-promoting complex/cyclosome (APC/C), could rescue the prolonged time of GVBD and increase the expression level of CCNB1 of oocytes from the CRS mice. Collectively, our results demonstrated that stress disturbed meiotic resumption through APC/C-mediated CCNB1 degradation, thus providing a novel understanding for stress-related oocyte quality decline; moreover, it may provide a non-invasive approach to select high-quality gametes and novel targets for molecular therapy to treat stress-related female infertility.
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Affiliation(s)
- Junyan Sun
- a The International Peace Maternity and Child Health Hospital, School of Medicine , Shanghai Jiaotong University , Shanghai , China
| | - Ying Guo
- a The International Peace Maternity and Child Health Hospital, School of Medicine , Shanghai Jiaotong University , Shanghai , China
| | - Qiuwan Zhang
- a The International Peace Maternity and Child Health Hospital, School of Medicine , Shanghai Jiaotong University , Shanghai , China
| | - Shixia Bu
- a The International Peace Maternity and Child Health Hospital, School of Medicine , Shanghai Jiaotong University , Shanghai , China
| | - Boning Li
- a The International Peace Maternity and Child Health Hospital, School of Medicine , Shanghai Jiaotong University , Shanghai , China
| | - Qian Wang
- a The International Peace Maternity and Child Health Hospital, School of Medicine , Shanghai Jiaotong University , Shanghai , China
| | - Dongmei Lai
- a The International Peace Maternity and Child Health Hospital, School of Medicine , Shanghai Jiaotong University , Shanghai , China
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Faramarzi A, Khalili MA, Agha-Rahimi A, Omidi M. Is there any correlation between oocyte polarization microscopy findings with embryo time lapse monitoring in ICSI program? Arch Gynecol Obstet 2017; 295:1515-1522. [DOI: 10.1007/s00404-017-4387-8] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2017] [Accepted: 04/12/2017] [Indexed: 10/19/2022]
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Stensen MH, Tanbo TG, Storeng R, Åbyholm T, Fedorcsak P. Fragmentation of human cleavage-stage embryos is related to the progression through meiotic and mitotic cell cycles. Fertil Steril 2014; 103:374-81.e4. [PMID: 25467039 DOI: 10.1016/j.fertnstert.2014.10.031] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2014] [Revised: 10/16/2014] [Accepted: 10/20/2014] [Indexed: 11/19/2022]
Abstract
OBJECTIVE To study whether fragmentation of human embryos is related to the progression through meiotic and mitotic cell cycles. DESIGN This report consists of two observational studies. SETTING Not applicable. PATIENT(S) A total of 1,943 oocytes from 297 patients and 372 embryos from 100 patients were imaged in the Polscope instrument and monitored in the Embryoscope, respectively. INTERVENTION(S) Completion of the first meiotic division was determined by visualization of the meiotic metaphase II spindle in human oocytes, and the duration of the first three mitotic cell cycles was determined with time-lapse microscopy. The percentage of embryo fragmentation was recorded 42-45 hours after insemination. MAIN OUTCOME MEASURE(S) Appearance of the meiotic spindle; durations of the first, second, and third mitoses. RESULT(S) Human embryos with a low degree of fragmentation (<10%) at 42-45 hours after insemination originated from oocytes with an early appearance of the meiotic spindle (mean 35.5 hours after hCG injection), early first mitosis (28.2 hours after insemination), late start of the second mitosis (38.0 hours after insemination), and a shorter duration of the third mitosis (1.1 hours). Highly fragmented embryos (>50% fragmentation) originated from oocytes with a late-appearing meiotic spindle (36.5 hours after hCG injection), delayed initiation of the first mitosis (29.8 hours after insemination), early start of the second mitosis (36.4 hours after insemination), and a longer duration of the third mitotic cell cycle (4.1 hours). CONCLUSION(S) The observed associations suggest that the process of fragmentation of in vitro-derived embryos was related to the progress of the meiotic and the mitotic cell cycles.
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Affiliation(s)
- Mette Haug Stensen
- Norwegian National Advisory Unit on Women's Health, Women and Children's Division, Oslo University Hospital Rikshospitalet, Oslo, Norway.
| | - Tom Gunnar Tanbo
- Section of Reproductive Medicine, Department of Gynecology, Oslo University Hospital Rikshospitalet, Oslo, Norway; Institute of Clinical Medicine, University of Oslo, Oslo, Norway
| | - Ritsa Storeng
- Norwegian National Advisory Unit on Women's Health, Women and Children's Division, Oslo University Hospital Rikshospitalet, Oslo, Norway
| | - Thomas Åbyholm
- Department of Obstetrics, Women and Children's Division, Oslo University Hospital Rikshospitalet, Oslo, Norway
| | - Peter Fedorcsak
- Section of Reproductive Medicine, Department of Gynecology, Oslo University Hospital Rikshospitalet, Oslo, Norway
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Kilani S, Chapman MG. Meiotic spindle normality predicts live birth in patients with recurrent in vitro fertilization failure. Fertil Steril 2014; 101:403-6. [DOI: 10.1016/j.fertnstert.2013.10.045] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2013] [Revised: 10/26/2013] [Accepted: 10/29/2013] [Indexed: 11/28/2022]
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Dib LA, Broi MGD, Navarro PA. Comparative Analysis of the Spindle of Fresh In Vivo-Matured Human Oocytes Through Polarized Light and Confocal Microscopy. Reprod Sci 2014; 21:984-992. [DOI: 10.1177/1933719113519174] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Affiliation(s)
- Luciana Azôr Dib
- Department of Obstetrics and Gynecology, Ribeirão Preto Medical School, São Paulo University, Ribeirão Preto, Sao Paulo, Brazil
- National Institute of Hormones and Women’s Health, Ribeirão Preto, São Paulo, Brazil
| | - Michele Gomes Da Broi
- Department of Obstetrics and Gynecology, Ribeirão Preto Medical School, São Paulo University, Ribeirão Preto, Sao Paulo, Brazil
- National Institute of Hormones and Women’s Health, Ribeirão Preto, São Paulo, Brazil
| | - Paula Andrea Navarro
- Department of Obstetrics and Gynecology, Ribeirão Preto Medical School, São Paulo University, Ribeirão Preto, Sao Paulo, Brazil
- National Institute of Hormones and Women’s Health, Ribeirão Preto, São Paulo, Brazil
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Caamaño JN, Díez C, Trigal B, Muñoz M, Morató R, Martín D, Carrocera S, Mogas T, Gómez E. Assessment of Meiotic Spindle Configuration and Post-Warming Bovine Oocyte Viability Using Polarized Light Microscopy. Reprod Domest Anim 2012; 48:470-6. [DOI: 10.1111/rda.12111] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2012] [Accepted: 09/19/2012] [Indexed: 12/31/2022]
Affiliation(s)
- JN Caamaño
- Genética y Reproducción Animal; Centro de Biotecnología Animal; Servicio Regional de Investigación y Desarrollo Agroalimentario; Gijón; Principado de Asturias; Spain
| | - C Díez
- Genética y Reproducción Animal; Centro de Biotecnología Animal; Servicio Regional de Investigación y Desarrollo Agroalimentario; Gijón; Principado de Asturias; Spain
| | - B Trigal
- Genética y Reproducción Animal; Centro de Biotecnología Animal; Servicio Regional de Investigación y Desarrollo Agroalimentario; Gijón; Principado de Asturias; Spain
| | - M Muñoz
- Genética y Reproducción Animal; Centro de Biotecnología Animal; Servicio Regional de Investigación y Desarrollo Agroalimentario; Gijón; Principado de Asturias; Spain
| | - R Morató
- Departament de Medicina i Cirurgia Animals; Universitat Autònoma de Barcelona; Bellaterra; Spain
| | - D Martín
- Genética y Reproducción Animal; Centro de Biotecnología Animal; Servicio Regional de Investigación y Desarrollo Agroalimentario; Gijón; Principado de Asturias; Spain
| | - S Carrocera
- Genética y Reproducción Animal; Centro de Biotecnología Animal; Servicio Regional de Investigación y Desarrollo Agroalimentario; Gijón; Principado de Asturias; Spain
| | - T Mogas
- Departament de Medicina i Cirurgia Animals; Universitat Autònoma de Barcelona; Bellaterra; Spain
| | - E Gómez
- Genética y Reproducción Animal; Centro de Biotecnología Animal; Servicio Regional de Investigación y Desarrollo Agroalimentario; Gijón; Principado de Asturias; Spain
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Díez C, Muñoz M, Caamaño JN, Gómez E. Cryopreservation of the Bovine Oocyte: Current Status and Perspectives. Reprod Domest Anim 2012; 47 Suppl 3:76-83. [DOI: 10.1111/j.1439-0531.2012.02029.x] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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