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de Lima CB, Martin H, Pecora Milazzotto M, Sirard MA. Genome-wide methylation profile of mitochondrial DNA across bovine preimplantation development. Epigenetics 2023; 18:2241010. [PMID: 37523633 PMCID: PMC10392754 DOI: 10.1080/15592294.2023.2241010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2023] [Revised: 06/29/2023] [Accepted: 07/11/2023] [Indexed: 08/02/2023] Open
Abstract
This study characterized variations in the methylation profile of mitochondrial DNA (mtDNA) during initial bovine embryo development and correlated the presence of methylation with mtDNA transcription. Bovine oocytes were obtained from abattoir ovaries and submitted to in vitro culture procedures. Oocytes and embryos were collected at various stages (immature oocyte, IM; mature oocyte, MII; zygote, ZY; 4-cells, 4C; 16-cells, 16C and blastocysts, BL). Total DNA (including mtDNA) was used for Whole Genome Enzymatic Methyl Sequencing and for quantification of mtDNA copy number. Extracted RNA was used for quantification of mitochondrial transcripts using Droplet Digital PCR. We selected ND6, CYTB, tRNA-Phe and tRNA-Gln based on their location in the mitochondrial genome, functionality and/or previous literature associating these regions with cytosine methylation. The number of mtDNA copies per oocyte/embryo was found to be similar, while methylation levels in mtDNA varied among stages. Higher total methylation levels were found mainly at 4C and 16C. In specific gene regions, higher methylation levels were also observed at 4C and 16C (ND6, CYTB and tRNA-Phe), as well as an inverse correlation with the quantity of transcripts for these regions. This is a first description of epigenetic changes occurring in mtDNA during early embryonic development. Our results indicate that methylation might regulate the mtDNA transcription at a local level, particularly around the time of embryonic genome activation.
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Affiliation(s)
- Camila Bruna de Lima
- Centre de Recherche En Reproduction, Développement Et Santé Intergénérationnelle (CRDSI), Département des Sciences Animales, Université Laval, Québec, QC, Canada
- Universidade Federal Do ABC, Centro de Ciências Naturais E Humanas, Santo André, SP, Brazil
| | - Hélène Martin
- Centre de Recherche En Reproduction, Développement Et Santé Intergénérationnelle (CRDSI), Département des Sciences Animales, Université Laval, Québec, QC, Canada
| | - Marcella Pecora Milazzotto
- Centre de Recherche En Reproduction, Développement Et Santé Intergénérationnelle (CRDSI), Département des Sciences Animales, Université Laval, Québec, QC, Canada
- Universidade Federal Do ABC, Centro de Ciências Naturais E Humanas, Santo André, SP, Brazil
| | - Marc-André Sirard
- Centre de Recherche En Reproduction, Développement Et Santé Intergénérationnelle (CRDSI), Département des Sciences Animales, Université Laval, Québec, QC, Canada
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Hafez HA, Atoom AM, Khafaga RHM, Shaker SA, Kamel MA, Assem NM, Mahmoud SA. Direct-Acting Antiviral Drug Modulates the Mitochondrial Biogenesis in Different Tissues of Young Female Rats. Int J Mol Sci 2023; 24:15844. [PMID: 37958828 PMCID: PMC10647297 DOI: 10.3390/ijms242115844] [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: 09/16/2023] [Revised: 10/28/2023] [Accepted: 10/28/2023] [Indexed: 11/15/2023] Open
Abstract
(1) Background: Hepatitis C virus (HCV) infection is endemic in Egypt, with the highest prevalence rate worldwide. Sofosbuvir (SOF) is a nucleos(t)ide analog that specifically inhibits HCV replication. This study aimed to explore the possible effects of the therapeutic dose of SOF on the mitochondrial biogenesis and functions of the liver, muscle, and ovarian tissues of young normal female rats. (2) Methods: This study was conducted on 20 female Wistar rats, classified into two groups, the control group and the exposed group; the latter was orally supplemented with 4 mg/kg/day of SOF for 3 months. (3) Results: The exposure to SOF impairs mitochondrial biogenesis via mitochondrial DNA copy number decline and suppressed mitochondrial biogenesis-regulated parameters at mRNA and protein levels. Also, SOF suppresses the DNA polymerase γ (POLG) expression, citrate synthase activity, and mitochondrial NADH dehydrogenase subunit-5 (ND5) content, which impairs mitochondrial functions. SOF increased lipid peroxidation and oxidative DNA damage markers and decreased tissue expression of nuclear factor erythroid 2-related factor 2 (Nfe2l2). (4) Conclusions: The present findings demonstrate the adverse effects of SOF on mitochondrial biogenesis and function in different tissues of young female rats, which mostly appeared in ovarian tissues.
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Affiliation(s)
- Hala A. Hafez
- Department of Biochemistry, Medical Research Institute, Alexandria University, Alexandria 21561, Egypt; (R.H.M.K.); (S.A.S.); (N.M.A.); (S.A.M.)
| | - Ali M. Atoom
- Department of Medical Laboratory Sciences, Faculty of Allied Medical Sciences, Al-Ahliyya Amman University, Amman 19111, Jordan;
| | - Rana H. M. Khafaga
- Department of Biochemistry, Medical Research Institute, Alexandria University, Alexandria 21561, Egypt; (R.H.M.K.); (S.A.S.); (N.M.A.); (S.A.M.)
| | - Sara A. Shaker
- Department of Biochemistry, Medical Research Institute, Alexandria University, Alexandria 21561, Egypt; (R.H.M.K.); (S.A.S.); (N.M.A.); (S.A.M.)
| | - Maher A. Kamel
- Department of Biochemistry, Medical Research Institute, Alexandria University, Alexandria 21561, Egypt; (R.H.M.K.); (S.A.S.); (N.M.A.); (S.A.M.)
| | - Nagwa M. Assem
- Department of Biochemistry, Medical Research Institute, Alexandria University, Alexandria 21561, Egypt; (R.H.M.K.); (S.A.S.); (N.M.A.); (S.A.M.)
| | - Shimaa A. Mahmoud
- Department of Biochemistry, Medical Research Institute, Alexandria University, Alexandria 21561, Egypt; (R.H.M.K.); (S.A.S.); (N.M.A.); (S.A.M.)
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Gonzalez XV, Almutlaq A, Gupta SS. Systematic review of mRNA expression in human oocytes: understanding the molecular mechanisms underlying oocyte competence. J Assist Reprod Genet 2023; 40:2283-2295. [PMID: 37558907 PMCID: PMC10504133 DOI: 10.1007/s10815-023-02906-9] [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: 02/26/2023] [Accepted: 08/02/2023] [Indexed: 08/11/2023] Open
Abstract
The biggest cell in the human body, the oocyte, encloses almost the complete machinery to start life. Despite all the research performed to date, defining oocyte quality is still a major goal of reproductive science. It is the consensus that mature oocytes are transcriptionally silent although, during their growth, the cell goes through stages of active transcription and translation, which will endow the oocyte with the competence to undergo nuclear maturation, and the oocyte and embryo to initiate timely translation before the embryonic genome is fully activated (cytoplasmic maturation). A systematic search was conducted across three electronic databases and the literature was critically appraised using the KMET score system. The aim was to identify quantitative differences in transcriptome of human oocytes that may link to patient demographics that could affect oocyte competence. Data was analysed following the principles of thematic analysis. Differences in the transcriptome were identified with respect to age or pathological conditions and affected chromosome mis segregation, perturbations of the nuclear envelope, premature maturation, and alterations in metabolic pathways-amongst others-in human oocytes.
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Affiliation(s)
- Xavier Viñals Gonzalez
- Institute for Women's Health, Preimplantation Genetics Group, University College London, 84-86 Chenies Mews, Bloomsbury, London, WC1E 6HU, UK.
| | - Arwa Almutlaq
- Institute for Women's Health, Preimplantation Genetics Group, University College London, 84-86 Chenies Mews, Bloomsbury, London, WC1E 6HU, UK
| | - Sioban Sen Gupta
- Institute for Women's Health, Preimplantation Genetics Group, University College London, 84-86 Chenies Mews, Bloomsbury, London, WC1E 6HU, UK
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Wiyono T, Dwiningsih SR, Widjiati W. The Impact of Endometriosis on Intracellular Calcium Levels, Cyclic Dependent Kinase 1 (Cdk1) Expression, and Cyclin B Expression in Post-Ovulation Oocytes of Mice Model. J Reprod Infertil 2023; 24:232-239. [PMID: 38164432 PMCID: PMC10757684 DOI: 10.18502/jri.v24i4.14150] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2023] [Accepted: 10/07/2023] [Indexed: 01/03/2024] Open
Abstract
Background Since endometriosis causes a decrease in oocyte quality, the success rate of in vitro fertilization cycles decreases. The purpose of the current study was to analyze the effect of endometriosis on intracellular calcium levels, Cdk1 expression, and cyclin B expression in oocytes. Methods Thirty-two mice (Mus musculus) were divided into control and endometriosis groups. The cumulus oocyte complex (COC) were obtained in all groups. Denudated cells were assessed for calcium levels by calorimetric examinations. Complex oocytes were examined for Cdk1 and cyclin B expression by immune-cytochemistry and were read under a microscope. Results Intercellular calcium levels, Cdk1, and cyclin B expression were significantly lower in the endometriosis group than in the control group. There was a significant relationship between calcium levels and Cdk1 expression (p<0.05, r=0.659), a significant relationship between calcium levels and cyclin B expression (p<0.05, r=0.885), and also a significant correlation between Cdk1 and cyclin B expression (p<0.05, r=0.537). Conclusion The data presented in this study suggested that the intracellular oocyte calcium level, Cdk1 expression, and cyclin B expression were lower in mice with endometriosis. A positive correlation was observed between calcium levels and the expression of Cdk1 and cyclin B. Furthermore, a positive correlation was also found between Cdk1 and cyclin B expression.
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Affiliation(s)
- Teguh Wiyono
- Department of Obstetrics and Gynecology, Faculty of Medicine, Airlangga University, Surabaya, Indonesia
| | - Sri Ratna Dwiningsih
- Department of Obstetrics and Gynecology, Faculty of Medicine, Airlangga University, Surabaya, Indonesia
| | - Widjiati Widjiati
- Department of Veterinary Embryology, Faculty of Veterinary Medicine, Airlangga University, Surabaya, Indonesia
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Silva MRL, Alves JPM, Fernandes CCL, Cavalcanti CM, Conde AJH, Bezerra AF, Soares ACS, Tetaping GM, de Sá NAR, Teixeira DÍA, do Rego AC, Rodrigues APR, Rondina D. Use of green microalgae Chlorella as a nutritional supplement to support oocyte and embryo production in goats. Anim Reprod Sci 2023; 256:107296. [PMID: 37487276 DOI: 10.1016/j.anireprosci.2023.107296] [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: 05/02/2023] [Revised: 07/06/2023] [Accepted: 07/12/2023] [Indexed: 07/26/2023]
Abstract
This study aimed to evaluate the use of green microalgae as a nutritional supplement for oocyte and embryo production in goats. Two experiments were performed on adult goats to obtain oocytes (EVO; n = 14) and in vivo embryos (IVD; n = 14). In both, the donors were divided into control (n = 7) and Chlorella (n = 7) groups. All goats received a base diet, and donors were orally supplemented with Chlorella pyrenoidosa (CH) in the Chlorella groups. For EVO, donors received 10 g CH for 14 days, and for IVD, 20 g CH was given for six days before embryo recovery. In EVO and IVD, food intake in the CH group was comparatively low, and it showed relatively high subcutaneous adipose deposition. In addition, the CH group exhibited an increase in triglyceride, cholesterol, and plasma glucose levels. In IVD, a significant increase in peripheral glutathione peroxidase levels was noticed. In EVO, the CH group showed relatively large follicular size and an increase in intrafollicular levels of triglycerides, glucose, and glutathione peroxidase. No differences were observed in the oocyte collected, and CH oocytes showed a low intensity of MitoTracker fluorescence (MT). In IVD, the CH group had a high proportion of transferable embryos, and these structures exhibited high fluorescence intensities for MT and H2DCFDA probes. We concluded that under these conditions, CH did not enhance the quality of the recovered oocytes. However, a daily dose of 20 g CH improved the quality of embryos and stimulated their mitochondrial functionality.
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Affiliation(s)
- Maria Raquel Lopes Silva
- School of Veterinary Medicine, Ceará State University (UECE), Fortaleza, Ceará 60714-903, Brazil
| | | | | | - Camila Muniz Cavalcanti
- School of Veterinary Medicine, Ceará State University (UECE), Fortaleza, Ceará 60714-903, Brazil
| | | | | | | | - Gildas Mbemya Tetaping
- School of Veterinary Medicine, Ceará State University (UECE), Fortaleza, Ceará 60714-903, Brazil
| | | | | | - Anibal Coutinho do Rego
- Department of Animal Science, Federal University of Ceará (UFC), Fortaleza, Ceará 60021-970 Brazil
| | | | - Davide Rondina
- School of Veterinary Medicine, Ceará State University (UECE), Fortaleza, Ceará 60714-903, Brazil.
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Meng T, Guo J, Zhu L, Yin Y, Wang F, Han Z, Lei L, Ma X, Xue Y, Yue W, Nie X, Zhao Z, Zhang H, Sun S, Ouyang Y, Hou Y, Schatten H, Ju Z, Ou X, Wang Z, Wong CCL, Li Z, Sun Q. NLRP14 Safeguards Calcium Homeostasis via Regulating the K27 Ubiquitination of Nclx in Oocyte-to-Embryo Transition. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2023; 10:e2301940. [PMID: 37493331 PMCID: PMC10520637 DOI: 10.1002/advs.202301940] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/27/2023] [Revised: 06/25/2023] [Indexed: 07/27/2023]
Abstract
Sperm-induced Ca2+ rise is critical for driving oocyte activation and subsequent embryonic development, but little is known about how lasting Ca2+ oscillations are regulated. Here it is shown that NLRP14, a maternal effect factor, is essential for keeping Ca2+ oscillations and early embryonic development. Few embryos lacking maternal NLRP14 can develop beyond the 2-cell stage. The impaired developmental potential of Nlrp14-deficient oocytes is mainly caused by disrupted cytoplasmic function and calcium homeostasis due to altered mitochondrial distribution, morphology, and activity since the calcium oscillations and development of Nlrp14-deficient oocytes can be rescued by substitution of whole cytoplasm by spindle transfer. Proteomics analysis reveal that cytoplasmic UHRF1 (ubiquitin-like, containing PHD and RING finger domains 1) is significantly decreased in Nlrp14-deficient oocytes, and Uhrf1-deficient oocytes also show disrupted calcium homeostasis and developmental arrest. Strikingly, it is found that the mitochondrial Na+ /Ca2+ exchanger (NCLX) encoded by Slc8b1 is significantly decreased in the Nlrp14mNull oocyte. Mechanistically, NLRP14 interacts with the NCLX intrinsically disordered regions (IDRs) domain and maintain its stability by regulating the K27-linked ubiquitination. Thus, the study reveals NLRP14 as a crucial player in calcium homeostasis that is important for early embryonic development.
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Affiliation(s)
- Tie‐Gang Meng
- Fertility Preservation LabGuangdong‐Hong Kong Metabolism and Reproduction Joint LaboratoryReproductive Medicine CenterGuangdong Second Provincial General HospitalGuangzhou510317P. R. China
- State Key Laboratory of Stem Cell and Reproductive BiologyInstitute of ZoologyChinese Academy of SciencesBeijing100101P. R. China
| | - Jia‐Ni Guo
- State Key Laboratory of Stem Cell and Reproductive BiologyInstitute of ZoologyChinese Academy of SciencesBeijing100101P. R. China
| | - Liu Zhu
- School of Basic Medical SciencesPeking University Health Science CenterBeijing100191P. R. China
| | - Yike Yin
- Center for Growth Metabolism & AgingKey Laboratory of Bio‐Resource and Eco‐Environment of Ministry of EducationCollege of Life SciencesSichuan UniversityChengdu610017P. R. China
| | - Feng Wang
- State Key Laboratory of Stem Cell and Reproductive BiologyInstitute of ZoologyChinese Academy of SciencesBeijing100101P. R. China
| | - Zhi‐Ming Han
- State Key Laboratory of Stem Cell and Reproductive BiologyInstitute of ZoologyChinese Academy of SciencesBeijing100101P. R. China
| | - Lei Lei
- Department of Histology and EmbryologyHarbin Medical UniversityHarbin150088P. R. China
| | - Xue‐Shan Ma
- State Key Laboratory of Stem Cell and Reproductive BiologyInstitute of ZoologyChinese Academy of SciencesBeijing100101P. R. China
| | - Yue Xue
- State Key Laboratory of Stem Cell and Reproductive BiologyInstitute of ZoologyChinese Academy of SciencesBeijing100101P. R. China
| | - Wei Yue
- State Key Laboratory of Stem Cell and Reproductive BiologyInstitute of ZoologyChinese Academy of SciencesBeijing100101P. R. China
| | - Xiao‐Qing Nie
- State Key Laboratory of Stem Cell and Reproductive BiologyInstitute of ZoologyChinese Academy of SciencesBeijing100101P. R. China
| | - Zheng‐Hui Zhao
- Fertility Preservation LabGuangdong‐Hong Kong Metabolism and Reproduction Joint LaboratoryReproductive Medicine CenterGuangdong Second Provincial General HospitalGuangzhou510317P. R. China
- State Key Laboratory of Stem Cell and Reproductive BiologyInstitute of ZoologyChinese Academy of SciencesBeijing100101P. R. China
| | - Hong‐Yong Zhang
- State Key Laboratory of Stem Cell and Reproductive BiologyInstitute of ZoologyChinese Academy of SciencesBeijing100101P. R. China
| | - Si‐Min Sun
- State Key Laboratory of Stem Cell and Reproductive BiologyInstitute of ZoologyChinese Academy of SciencesBeijing100101P. R. China
| | - Ying‐Chun Ouyang
- State Key Laboratory of Stem Cell and Reproductive BiologyInstitute of ZoologyChinese Academy of SciencesBeijing100101P. R. China
| | - Yi Hou
- State Key Laboratory of Stem Cell and Reproductive BiologyInstitute of ZoologyChinese Academy of SciencesBeijing100101P. R. China
| | - Heide Schatten
- Department of Veterinary PathobiologyUniversity of MissouriColumbiaMO65211USA
| | - Zhenyu Ju
- Key Laboratory of Regenerative Medicine of Ministry of EducationInstitute of Aging and Regenerative MedicineJinan UniversityGuangzhouGuangdong510632P. R. China
| | - Xiang‐Hong Ou
- Fertility Preservation LabGuangdong‐Hong Kong Metabolism and Reproduction Joint LaboratoryReproductive Medicine CenterGuangdong Second Provincial General HospitalGuangzhou510317P. R. China
| | - Zhen‐Bo Wang
- State Key Laboratory of Stem Cell and Reproductive BiologyInstitute of ZoologyChinese Academy of SciencesBeijing100101P. R. China
| | - Catherine C. L. Wong
- Department of Medical Research CenterState Key Laboratory of Complex Severe and Rare DiseasesPeking Union Medical College HospitalChinese Academy of Medical Science & Peking Union Medical CollegeBeijing100730P. R. China
- Tsinghua University‐Peking University Joint Center for Life SciencesTsinghua UniversityBeijing100084P. R. China
| | - Zhonghan Li
- Center for Growth Metabolism & AgingKey Laboratory of Bio‐Resource and Eco‐Environment of Ministry of EducationCollege of Life SciencesSichuan UniversityChengdu610017P. R. China
| | - Qing‐Yuan Sun
- Fertility Preservation LabGuangdong‐Hong Kong Metabolism and Reproduction Joint LaboratoryReproductive Medicine CenterGuangdong Second Provincial General HospitalGuangzhou510317P. R. China
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Widyanugraha MA, Widjiati W, Hendarto H. Effect of Endometriosis on Cumulus ATP, Number of Mitochondria and Oocyte Maturity in Cumulus Oocyte Complex in Mice. REVISTA BRASILEIRA DE GINECOLOGIA E OBSTETRÍCIA 2023; 45:e393-e400. [PMID: 37595596 PMCID: PMC10438966 DOI: 10.1055/s-0043-1772186] [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: 10/29/2022] [Accepted: 02/27/2023] [Indexed: 08/20/2023] Open
Abstract
OBJECTIVE Endometriosis causes a decrease in oocyte quality. However, this mechanism is not fully understood. The present study aimed to analyze the effect of endometriosis on cumulus cell adenosine triphosphate ATP level, the number of mitochondria, and the oocyte maturity level. METHODS A true experimental study with a post-test only control group design on experimental animals. Thirty-two mice were divided into control and endometriosis groups. Cumulus oocyte complex (COC) was obtained from all groups. Adenosine triphosphate level on cumulus cells was examined using the Elisa technique, the number of mitochondria was evaluated with a confocal laser scanning microscope and the oocyte maturity level was evaluated with an inverted microscope. RESULTS The ATP level of cumulus cells and the number of mitochondria in the endometriosis group increased significantly (p < 0.05; p < 0.05) while the oocyte maturity level was significantly lower (p < 0.05). There was a significant relationship between ATP level of cumulus cells and the number of mitochondrial oocyte (p < 0.01). There was no significant relationship between cumulus cell ATP level and the number of mitochondrial oocytes with oocyte maturity level (p > 0.01; p > 0.01). The ROC curve showed that the number of mitochondrial oocytes (AUC = 0.672) tended to be more accurate than cumulus cell ATP level (AUC = 0.656) in determining the oocyte maturity level. CONCLUSION In endometriosis model mice, the ATP level of cumulus cells and the number of mitochondrial oocytes increased while the oocyte maturity level decreased. There was a correlation between the increase in ATP level of cumulus cells and an increase in the number of mitochondrial oocytes.
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Affiliation(s)
| | - Widjiati Widjiati
- Department of Veterinary Science, Faculty of Veterinary Medicine, Universitas Airlangga, Surabaya, Indonesia
| | - Hendy Hendarto
- Department of Obstetrics and Gynecology, Faculty of Medicine, Universitas Airlangga, Surabaya, Indonesia
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Biswas S, Ghosh S, Maitra S. Role of insulin-like growth factor 1 (IGF1) in the regulation of mitochondrial bioenergetics in zebrafish oocytes: lessons from in vivo and in vitro investigations. Front Cell Dev Biol 2023; 11:1202693. [PMID: 37457295 PMCID: PMC10347385 DOI: 10.3389/fcell.2023.1202693] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2023] [Accepted: 06/06/2023] [Indexed: 07/18/2023] Open
Abstract
Optimal mitochondrial functioning is indispensable for acquiring oocyte competence and meiotic maturation, whilst mitochondrial dysfunction may lead to diminished reproductive potential and impaired fertility. The role of the intra-ovarian IGF system in ovarian follicular dynamics has been implicated earlier. Although several studies have demonstrated the role of the IGF axis in facilitating mitochondrial function over a multitude of cell lines, its role in oocyte energy metabolism remains largely unexplored. Here using zebrafish, the relative importance of IGF1 in modulating oocyte mitochondrial bioenergetics has been investigated. A dramatic increase in ovarian lhcgr and igf1 expression accompanied heightened ATP levels and mitochondrial polarization in full-grown (FG) oocytes resuming meiotic maturation and ovulation in vivo. Concomitant with elevated igf1 expression and IGF1R phosphorylation, hCG (LH analog) stimulation of FG follicles in vitro prompted a sharp increase in NRF-1 and ATP levels, suggesting a positive influence of gonadotropin action on igf1 expression vis-à-vis oocyte bioenergetics. While recombinant IGF1 administration enhanced mitochondrial function, IGF1R immunodepletion or priming with PI3K inhibitor wortmannin could abrogate NRF-1 immunoreactivity, expression of respiratory chain subunits, ΔΨM, and ATP content. Mechanistically, activation of PI3K/Akt signaling in IGF1-treated follicles corroborated well with the rapid phosphorylation of GSK3β at Ser9 (inactive) followed by PGC-1β accumulation. While selective inhibition of GSK3β promoted PGC-1β, Akt inhibition could abrogate IGF1-induced p-GSK3β (Ser9) and PGC-1β immunoreactive protein indicating Akt-mediated GSK3β inactivation and PGC-1β stabilization. The IGF1-depleted follicles showed elevated superoxide anions, subdued steroidogenic potential, and attenuated G2-M1 transition. In summary, this study highlights the importance of IGF1 signaling in oocyte bioenergetics prior to resumption of meiosis.
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Mahmoud SA, Abdel-Aziz MM, Khafaga RHM, Hafez HA, Kamel MA, Shaker SA. The pre-conception maternal exposure to Sofosbuvir affects the mitochondrial biogenesis in prenatal fetal tissues: Experimental study on rats. Mol Med 2023; 29:71. [PMID: 37280507 DOI: 10.1186/s10020-023-00666-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2022] [Accepted: 05/19/2023] [Indexed: 06/08/2023] Open
Abstract
BACKGROUND Hepatitis C virus (HCV) infection is a global public health problem and Egypt has the highest HCV prevalence worldwide. Hence, global efforts target to eliminate HCV by 2030. Sofosbuvir is a nucleotide analogue inhibitor of HCV polymerase essential for viral replication. Animal studies prove that Sofosbuvir metabolites cross the placenta and are excreted in the milk of nursing animals. We aimed to investigate the possible effects of preconception maternal exposure to Sofosbuvir on mitochondrial biogenesis in prenatal fetal liver, skeletal muscle, and placental tissues. METHODS The study was conducted on 20 female albino rats divided into a control group receiving a placebo and an exposed group receiving 4 mg/kg orally/day for 3 months of Sofosbuvir. At the end of the treatment period, pregnancy was induced in both groups by mating with healthy male rats overnight. At gestational day 17, all pregnant female rats were sacrificed. Each fetus was dissected to obtain the fetal liver, skeletal muscle, and placental tissues. RESULTS The results of our study indicated that the exposure of young female rats to Sofosbuvir affects pregnancy outcomes. Fetal liver and muscle showed lower mitochondrial DNA-copy number (mtDNA-CN) by about 24% and 29% respectively, peroxisome proliferator-activated receptor-gamma coactivator-1 alpha and its downstream targets; nuclear respiratory factor-1 and mitochondrial transcription factor A. While the placental tissues showed different patterns, particularly elevated in mtDNA-CN by about 43%. CONCLUSIONS The study provides preliminary evidence of the detrimental effects of Sofosbuvir on the pregnancy outcomes of the exposed females and may impair the placental and fetal organs' development. These effects may be mediated through modulating mitochondrial homeostasis and functions.
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Affiliation(s)
- Shimaa A Mahmoud
- Department of Biochemistry, Medical Research Institute, Alexandria University, 165 El-Horreya Avenue, EL-Hadara, P.O. Box 21561, Alexandria, Egypt.
| | - Maryam M Abdel-Aziz
- Department of Biochemistry, Medical Research Institute, Alexandria University, 165 El-Horreya Avenue, EL-Hadara, P.O. Box 21561, Alexandria, Egypt
| | - Rana H M Khafaga
- Department of Biochemistry, Medical Research Institute, Alexandria University, 165 El-Horreya Avenue, EL-Hadara, P.O. Box 21561, Alexandria, Egypt
| | - Hala A Hafez
- Department of Biochemistry, Medical Research Institute, Alexandria University, 165 El-Horreya Avenue, EL-Hadara, P.O. Box 21561, Alexandria, Egypt
| | - Maher A Kamel
- Department of Biochemistry, Medical Research Institute, Alexandria University, 165 El-Horreya Avenue, EL-Hadara, P.O. Box 21561, Alexandria, Egypt
| | - Sara A Shaker
- Department of Biochemistry, Medical Research Institute, Alexandria University, 165 El-Horreya Avenue, EL-Hadara, P.O. Box 21561, Alexandria, Egypt
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10
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Kang MH, Kim YJ, Lee JH. Mitochondria in reproduction. Clin Exp Reprod Med 2023; 50:1-11. [PMID: 36935406 PMCID: PMC10030209 DOI: 10.5653/cerm.2022.05659] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2022] [Accepted: 12/06/2022] [Indexed: 02/11/2023] Open
Abstract
In reproduction, mitochondria produce bioenergy, help to synthesize biomolecules, and support the ovaries, oogenesis, and preimplantation embryos, thereby facilitating healthy live births. However, the regulatory mechanism of mitochondria in oocytes and embryos during oogenesis and embryo development has not been clearly elucidated. The functional activity of mitochondria is crucial for determining the quality of oocytes and embryos; therefore, the underlying mechanism must be better understood. In this review, we summarize the specific role of mitochondria in reproduction in oocytes and embryos. We also briefly discuss the recovery of mitochondrial function in gametes and zygotes. First, we introduce the general characteristics of mitochondria in cells, including their roles in adenosine triphosphate and reactive oxygen species production, calcium homeostasis, and programmed cell death. Second, we present the unique characteristics of mitochondria in female reproduction, covering the bottleneck theory, mitochondrial shape, and mitochondrial metabolic pathways during oogenesis and preimplantation embryo development. Mitochondrial dysfunction is associated with ovarian aging, a diminished ovarian reserve, a poor ovarian response, and several reproduction problems in gametes and zygotes, such as aneuploidy and genetic disorders. Finally, we briefly describe which factors are involved in mitochondrial dysfunction and how mitochondrial function can be recovered in reproduction. We hope to provide a new viewpoint regarding factors that can overcome mitochondrial dysfunction in the field of reproductive medicine.
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Affiliation(s)
- Min-Hee Kang
- CHA Fertility Center Seoul Station, Seoul, Republic of Korea
- Department of Biomedical Science, College of Life Science, CHA University, Pocheon, Republic of Korea
| | - Yu Jin Kim
- CHA Fertility Center Seoul Station, Seoul, Republic of Korea
| | - Jae Ho Lee
- CHA Fertility Center Seoul Station, Seoul, Republic of Korea
- Department of Biomedical Science, College of Life Science, CHA University, Pocheon, Republic of Korea
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11
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Milazzotto MP, Ispada J, de Lima CB. Metabolism-epigenetic interactions on in vitro produced embryos. Reprod Fertil Dev 2022; 35:84-97. [PMID: 36592974 DOI: 10.1071/rd22203] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
Metabolism and epigenetics, which reciprocally regulate each other in different cell types, are fundamental aspects of cellular adaptation to the environment. Evidence in cancer and stem cells has shown that the metabolic status modifies the epigenome while epigenetic mechanisms regulate the expression of genes involved in metabolic processes, thereby altering the metabolome. This crosstalk occurs as many metabolites serve as substrates or cofactors of chromatin-modifying enzymes. If we consider the intense metabolic dynamic and the epigenetic remodelling of the embryo, the comprehension of these regulatory networks will be important not only for understanding early embryonic development, but also to determine in vitro culture conditions that support embryo development and may insert positive regulatory marks that may persist until adult life. In this review, we focus on how metabolism may affect epigenetic reprogramming of the early stages of development, in particular acetylation and methylation of histone and DNA. We also present other metabolic modifications in bovine embryos, such as lactylation, highlighting the promising epigenetic and metabolic targets to improve conditions for in vitro embryo development.
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Affiliation(s)
- Marcella Pecora Milazzotto
- Laboratory of Embryo Metabolism and Epigenomic, Center of Natural and Human Science, Federal University of ABC, Santo Andre, SP, Brazil
| | - Jessica Ispada
- Laboratory of Embryo Metabolism and Epigenomic, Center of Natural and Human Science, Federal University of ABC, Santo Andre, SP, Brazil
| | - Camila Bruna de Lima
- Centre de Recherche en Reproduction, Développement et Santé Intergénérationnelle (CRDSI), Département des Sciences Animales, Faculté des Sciences de l'Agriculture et de l'Alimentation, Université Laval, Quebec City, QC, Canada
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12
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Wang M, Ren J, Liu Z, Li S, Su L, Wang B, Han D, Liu G. Beneficial Effect of Selenium Doped Carbon Quantum Dots Supplementation on the in vitro Development Competence of Ovine Oocytes. Int J Nanomedicine 2022; 17:2907-2924. [PMID: 35814612 PMCID: PMC9270046 DOI: 10.2147/ijn.s360000] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2022] [Accepted: 04/06/2022] [Indexed: 12/01/2022] Open
Abstract
Background After the synthesis of selenium doped carbon quantum dots (Se/CDs) via a step-by-step hydrothermal synthesis method with diphenyl diselenide (DPDSe) as precursor, the beneficial effects of Se/CDs’ supplementation on the in vitro development competence of ovine oocytes were firstly investigated in this study by the assay of maturation rate, cortical granules’ (CGs) dynamics, mitochondrial activity, reactive oxygen species (ROS) production, epigenetic modification, transcript profile, and embryonic development competence. Results The results showed that the Se/CDs’ supplementation during the in vitro maturation (IVM) process not only enhanced the maturation rate, CGs’ dynamics, mitochondrial activity and embryonic developmental competence of ovine oocytes, but remarkably decreased the ROS production level of ovine oocytes. In addition, the expression levels of H3K9me3 and H3K27me3 in the ovine oocytes were significantly up-regulated after the Se/CDs’ supplementation, in consistent with the expression levels of 5mC and 5hmC. Moreover, 2994 up-regulated differentially expressed genes (DEGs) and 846 repressed DEGs were found in the oocytes after the Se/CDs’ supplementation. According to the analyses of Gene Ontology (GO) and Kyoto Encyclopedia of Genes and Genomes (KEGG), these DEGs induced by the Se/CDs’ supplementation were positively related to the progesterone mediated oocyte maturation and mitochondrial functions. And these remarkably up-regulated expression levels of DEGs related to oocyte maturation, mitochondrial function, and epigenetic modification induced by the Se/CDs’ supplementation further confirmed the beneficial effect of Se/CDs’ supplementation on the in vitro development competence of ovine oocytes. Conclusion The Se/CDs prepared in our study significantly promoted the in vitro development competence of ovine oocytes, benefiting the extended research about the potential applications of Se/CDs in mammalian breeding technologies.
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Affiliation(s)
- Mengqi Wang
- Key Laboratory of Medical Cell Biology, Clinical Medicine Research Center, Affiliated Hospital of Inner Mongolia Medical University, Hohhot, Inner Mongolia, People’s Republic of China
| | - Jingyu Ren
- Key Laboratory of Medical Cell Biology, Clinical Medicine Research Center, Affiliated Hospital of Inner Mongolia Medical University, Hohhot, Inner Mongolia, People’s Republic of China
| | - Zhanpeng Liu
- College of Life Science, Inner Mongolia University, Hohhot, Inner Mongolia, People’s Republic of China
| | - Shubin Li
- Department of Geriatric Medical Center, Inner Mongolia People’s Hospital, Hohhot, Inner Mongolia, People’s Republic of China
| | - Liya Su
- Key Laboratory of Medical Cell Biology, Clinical Medicine Research Center, Affiliated Hospital of Inner Mongolia Medical University, Hohhot, Inner Mongolia, People’s Republic of China
| | - Biao Wang
- Animal Husbandry Institute, Inner Mongolia Academy of Agricultural & Animal Husbandry Sciences, Hohhot, Inner Mongolia, People’s Republic of China
| | - Daoning Han
- Key Laboratory of Medical Cell Biology, Clinical Medicine Research Center, Affiliated Hospital of Inner Mongolia Medical University, Hohhot, Inner Mongolia, People’s Republic of China
| | - Gang Liu
- Key Laboratory of Medical Cell Biology, Clinical Medicine Research Center, Affiliated Hospital of Inner Mongolia Medical University, Hohhot, Inner Mongolia, People’s Republic of China
- Correspondence: Gang Liu, Email
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13
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Malott KF, Reshel S, Ortiz L, Luderer U. Glutathione deficiency decreases lipid droplet stores and increases reactive oxygen species in mouse oocytes†. Biol Reprod 2022; 106:1218-1231. [PMID: 35238901 PMCID: PMC9198951 DOI: 10.1093/biolre/ioac032] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2021] [Revised: 01/06/2022] [Accepted: 02/01/2022] [Indexed: 12/30/2022] Open
Abstract
Glutathione (GSH) is a tripeptide thiol antioxidant that has been shown to be important to overall reproductive health. Glutamate cysteine ligase, the rate-limiting enzyme in GSH synthesis consists of a catalytic and a modifier (GCLM) subunit. We previously showed that oxidative stress in the ovary and oocytes of Gclm-/- mice is associated with accelerated age-related decline in ovarian follicles and decreased female fertility due to preimplantation embryonic mortality. Mammalian preimplantation development is a highly regulated and energy-intensive process that primarily relies on coordination between lipid droplets (LDs) and mitochondria to maintain cellular homeostasis. In this study, we hypothesized that GSH deficiency in oocytes increases oxidative stress, leading to increased mitochondrial dysfunction and decreased LD consumption, thereby decreasing oocyte developmental competence. We observed that Gclm-/- oocytes have increased oxidative stress, primarily in the form of mitochondrial superoxide and decreased subcortical mitochondrial clusters. Further, Gclm-/- oocytes have decreased mitochondrial membrane potential (ΔΨm) compared with Gclm+/+. We surmise this is likely due to the decreased availability of LDs, as we observed a significant decrease in LD content in Gclm-/- oocytes compared with Gclm+/+. The decreased oocyte LD content is likely related to an altered serum lipidome, with Gclm-/- serum having relatively lower unsaturated fatty acids and triglycerides than that of Gclm+/+ and Gclm+/- females. Altogether these data support that decreased LDs and increased oxidative stress are primary drivers of decreased oocyte developmental competence in GSH-deficient oocytes.
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Affiliation(s)
- Kelli F Malott
- Environmental Health Sciences Graduate Program, University of California, Irvine, CA, USA
- Department of Environmental and Occupational Health, University of California, Irvine, CA, USA
- Department of Medicine, University of California, Irvine, CA, USA
| | - Samantha Reshel
- Department of Developmental and Cell Biology, University of California, Irvine, CA, USA
| | - Laura Ortiz
- Department of Medicine, University of California, Irvine, CA, USA
| | - Ulrike Luderer
- Environmental Health Sciences Graduate Program, University of California, Irvine, CA, USA
- Department of Environmental and Occupational Health, University of California, Irvine, CA, USA
- Department of Medicine, University of California, Irvine, CA, USA
- Department of Developmental and Cell Biology, University of California, Irvine, CA, USA
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14
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Sheng X, Liu C, Yan G, Li G, Liu J, Yang Y, Li S, Li Z, Zhou J, Zhen X, Zhang Y, Diao Z, Hu Y, Fu C, Yao B, Li C, Cao Y, Lu B, Yang Z, Qin Y, Sun H, Ding L. The mitochondrial protease LONP1 maintains oocyte development and survival by suppressing nuclear translocation of AIFM1 in mammals. EBioMedicine 2022; 75:103790. [PMID: 34974310 PMCID: PMC8733232 DOI: 10.1016/j.ebiom.2021.103790] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2021] [Revised: 12/14/2021] [Accepted: 12/15/2021] [Indexed: 11/26/2022] Open
Abstract
Background Oogenesis is a fundamental process of human reproduction, and mitochondria play crucial roles in oocyte competence. Mitochondrial ATP-dependent Lon protease 1 (LONP1) functions as a critical protein in maintaining mitochondrial and cellular homeostasis in somatic cells. However, the essential role of LONP1 in maintaining mammalian oogenesis is far from elucidated. Methods Using conditional oocyte Lonp1-knockout mice, RNA sequencing (RNA-seq) and coimmunoprecipitation/liquid chromatography–mass spectrometry (Co-IP/LC–MS) technology, we analysed the functions of LONP1 in mammalian oogenesis. Findings Conditional knockout of Lonp1 in mouse oocytes in both the primordial and growing follicle stages impairs follicular development and causes progressive oocyte death, ovarian reserve loss, and infertility. LONP1 directly interacts with apoptosis inducing factor mitochondria-associated 1 (AIFM1), and LONP1 ablation leads to the translocation of AIFM1 from the cytoplasm to the nucleus, causing apoptosis in mouse oocytes. In addition, women with pathogenic variants of LONP1 lack large antral follicles (>10 mm) in the ovaries, are infertile and present premature ovarian insufficiency. Interpretation We demonstrated the function of LONP1 in regulating oocyte development and survival, and in-depth analysis of LONP1 will be crucial for elucidating the mechanisms underlying premature ovarian insufficiency. Funding This work was supported by grants from the National Key Research and Development Program of China (2018YFC1004701), the National Nature Science Foundation of China (82001629, 81871128, 81571391, 81401166, 82030040), the Jiangsu Province Social Development Project (BE2018602), the Jiangsu Provincial Medical Youth Talent (QNRC2016006), the Youth Program of the Natural Science Foundation of Jiangsu Province (BK20200116) and Jiangsu Province Postdoctoral Research Funding (2021K277B).
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Affiliation(s)
- Xiaoqiang Sheng
- Center for Reproductive Medicine, Department of Obstetrics and Gynecology, The Affiliated Drum Tower Hospital of Nanjing University Medical School, 321 Zhongshan Rd., Nanjing, Jiangsu 210008, China; Center for Molecular Reproductive Medicine, Nanjing University, Nanjing, Jiangsu 210008, China
| | - Chuanming Liu
- Center for Reproductive Medicine, Department of Obstetrics and Gynecology, The Affiliated Drum Tower Hospital of Nanjing University Medical School, 321 Zhongshan Rd., Nanjing, Jiangsu 210008, China; Center for Molecular Reproductive Medicine, Nanjing University, Nanjing, Jiangsu 210008, China
| | - Guijun Yan
- Center for Reproductive Medicine, Department of Obstetrics and Gynecology, The Affiliated Drum Tower Hospital of Nanjing University Medical School, 321 Zhongshan Rd., Nanjing, Jiangsu 210008, China; Center for Molecular Reproductive Medicine, Nanjing University, Nanjing, Jiangsu 210008, China
| | - Guangyu Li
- Center for Reproductive Medicine, National Research Center for Assisted Reproductive Technology and Reproductive Genetics, The Key Laboratory of Reproductive Endocrinology (Shandong University), Ministry of Education, Shandong University, Jinan, Shangdong 250021, China
| | - Jingyu Liu
- Center for Reproductive Medicine, Department of Obstetrics and Gynecology, The Affiliated Drum Tower Hospital of Nanjing University Medical School, 321 Zhongshan Rd., Nanjing, Jiangsu 210008, China; Center for Molecular Reproductive Medicine, Nanjing University, Nanjing, Jiangsu 210008, China
| | - Yanjun Yang
- Department of Obstetrics and Gynecology, the Third Affiliated Hospital of Soochow University, Changzhou, Jiangsu 213003, China
| | - Shiyuan Li
- Center for Reproductive Medicine, Department of Obstetrics and Gynecology, The Affiliated Drum Tower Hospital of Nanjing University Medical School, 321 Zhongshan Rd., Nanjing, Jiangsu 210008, China; Center for Molecular Reproductive Medicine, Nanjing University, Nanjing, Jiangsu 210008, China
| | - Zhongxun Li
- Center for Reproductive Medicine, Department of Obstetrics and Gynecology, The Affiliated Drum Tower Hospital of Nanjing University Medical School, 321 Zhongshan Rd., Nanjing, Jiangsu 210008, China; Center for Molecular Reproductive Medicine, Nanjing University, Nanjing, Jiangsu 210008, China
| | - Jidong Zhou
- Center for Reproductive Medicine, Department of Obstetrics and Gynecology, The Affiliated Drum Tower Hospital of Nanjing University Medical School, 321 Zhongshan Rd., Nanjing, Jiangsu 210008, China; Center for Molecular Reproductive Medicine, Nanjing University, Nanjing, Jiangsu 210008, China
| | - Xin Zhen
- Center for Reproductive Medicine, Department of Obstetrics and Gynecology, The Affiliated Drum Tower Hospital of Nanjing University Medical School, 321 Zhongshan Rd., Nanjing, Jiangsu 210008, China; Center for Molecular Reproductive Medicine, Nanjing University, Nanjing, Jiangsu 210008, China
| | - Yang Zhang
- Center for Reproductive Medicine, Department of Obstetrics and Gynecology, The Affiliated Drum Tower Hospital of Nanjing University Medical School, 321 Zhongshan Rd., Nanjing, Jiangsu 210008, China; Center for Molecular Reproductive Medicine, Nanjing University, Nanjing, Jiangsu 210008, China
| | - Zhenyu Diao
- Center for Reproductive Medicine, Department of Obstetrics and Gynecology, The Affiliated Drum Tower Hospital of Nanjing University Medical School, 321 Zhongshan Rd., Nanjing, Jiangsu 210008, China; Center for Molecular Reproductive Medicine, Nanjing University, Nanjing, Jiangsu 210008, China
| | - Yali Hu
- Center for Reproductive Medicine, Department of Obstetrics and Gynecology, The Affiliated Drum Tower Hospital of Nanjing University Medical School, 321 Zhongshan Rd., Nanjing, Jiangsu 210008, China; Center for Molecular Reproductive Medicine, Nanjing University, Nanjing, Jiangsu 210008, China
| | - Chuanhai Fu
- School of Life Sciences, University of Science and Technology of China, Hefei, Anhui 230027, China
| | - Bin Yao
- The Reproductive Medical Center, Nanjing Jinling Hospital, Nanjing University School of Medicine, Nanjing, Jiangsu 210002, China
| | - Chaojun Li
- State Key Laboratory of Pharmaceutical Biotechnology, Medical School of Nanjing University & Model Animal Research Center, Nanjing University, Nanjing, Jiangsu 210093, China
| | - Yu Cao
- Institute of Precision Medicine, The Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200125, China; Department of Orthopaedics, Shanghai Key Laboratory of Orthopaedic Implant, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200011, China
| | - Bin Lu
- Protein Quality Control and Diseases Laboratory, Attardi Institute of Mitochondrial Biomedicine, School of Laboratory Medicine and Life Sciences, Wenzhou Medical University, Wenzhou, Zhejiang 325035, China
| | - Zhongzhou Yang
- State Key Laboratory of Pharmaceutical Biotechnology and MOE Key Laboratory of Model Animal for Disease Study, Model Animal Research Center, Nanjing University Medical School, Nanjing, Jiangsu 210093 China
| | - Yingying Qin
- Center for Reproductive Medicine, National Research Center for Assisted Reproductive Technology and Reproductive Genetics, The Key Laboratory of Reproductive Endocrinology (Shandong University), Ministry of Education, Shandong University, Jinan, Shangdong 250021, China.
| | - Haixiang Sun
- Center for Reproductive Medicine, Department of Obstetrics and Gynecology, The Affiliated Drum Tower Hospital of Nanjing University Medical School, 321 Zhongshan Rd., Nanjing, Jiangsu 210008, China; Center for Molecular Reproductive Medicine, Nanjing University, Nanjing, Jiangsu 210008, China.
| | - Lijun Ding
- Center for Reproductive Medicine, Department of Obstetrics and Gynecology, The Affiliated Drum Tower Hospital of Nanjing University Medical School, 321 Zhongshan Rd., Nanjing, Jiangsu 210008, China; Center for Molecular Reproductive Medicine, Nanjing University, Nanjing, Jiangsu 210008, China; Clinical Center for Stem Cell Research, the Affiliated Drum Tower Hospital of Nanjing University Medical School, Nanjing, Jiangsu 210008, China; State Key Laboratory of Analytic Chemistry for Life Science, Nanjing University, Nanjing, Jiangsu 210093, China.
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15
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Yang Y, Ning C, Li Y, Wang Y, Hu J, Liu Y, Zhang M, Sun Y, Gu W, Zhang Y, Sun J, Xu S. Dynamic changes in mitochondrial DNA, morphology, and fission during oogenesis of a seasonal-breeding teleost, Pampus argenteus. Tissue Cell 2021; 72:101558. [PMID: 34044232 DOI: 10.1016/j.tice.2021.101558] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2020] [Revised: 05/19/2021] [Accepted: 05/19/2021] [Indexed: 11/25/2022]
Abstract
Mitochondria play crucial roles during oocyte development. In this study, we have investigated mitochondrial morphology, mtDNA, Ca2+-ATP enzyme activity, and mitochondrial fission factor (mff) expression levels during oogenesis of the silver pomfret Pampus argenteus. The mtDNA increased with oocyte development, and mitochondrial morphology and distribution were stage-specific. In the perinucleolar oocytes, oval mitochondria were dispersed in the cytoplasm. In previtellogenic oocytes, mitochondria massively increased and aggregated, forming mitochondrial clouds. At the same time, two morphologically different types of mitochondria had been distinguished, one of which was elongated with well-developed cristae, and the other was round with distorted and fused cristae. During vitellogenesis, the increases in mitochondria with well-developed cristae and in Ca2+-ATPase enzymatic activity were accompanied by an accumulation of yolk substance, suggesting the possible participation of mitochondria in the formation of vitellogenesis. Furthermore, we examined the cDNA of mff its transcript levels in relation to oocyte development. The transcript levels of mff were high in the perinucleolar stage, increasing to the highest level at the previtellogenic stage. Immunocytochemistry showed that MFF was detected in the cytoplasm of previtellogenic and midvitellogenic oocytes. We speculated that the mff-mediated mitochondrial fission may play a crucial role in oocyte development, especially in vitellogenesis.
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Affiliation(s)
- Yang Yang
- College of Marine Science, Ningbo University, Ningbo, China; Key Laboratory of Marine Biotechnology of Zhejiang Province, Ningbo University, Ningbo, China; Collaborative Innovation Center for Zhejiang Marine High-efficiency and Healthy Aquaculture, Ningbo, China; Key Laboratory of Applied Marine Biotechnology, Ningbo University, Ministry of Education, Ningbo, China.
| | - Chao Ning
- College of Marine Science, Ningbo University, Ningbo, China; Key Laboratory of Marine Biotechnology of Zhejiang Province, Ningbo University, Ningbo, China; Collaborative Innovation Center for Zhejiang Marine High-efficiency and Healthy Aquaculture, Ningbo, China; Key Laboratory of Applied Marine Biotechnology, Ningbo University, Ministry of Education, Ningbo, China
| | - Yaya Li
- College of Marine Science, Ningbo University, Ningbo, China; Key Laboratory of Marine Biotechnology of Zhejiang Province, Ningbo University, Ningbo, China; Collaborative Innovation Center for Zhejiang Marine High-efficiency and Healthy Aquaculture, Ningbo, China; Key Laboratory of Applied Marine Biotechnology, Ningbo University, Ministry of Education, Ningbo, China
| | - Yajun Wang
- College of Marine Science, Ningbo University, Ningbo, China; Key Laboratory of Marine Biotechnology of Zhejiang Province, Ningbo University, Ningbo, China; Collaborative Innovation Center for Zhejiang Marine High-efficiency and Healthy Aquaculture, Ningbo, China; Key Laboratory of Applied Marine Biotechnology, Ningbo University, Ministry of Education, Ningbo, China.
| | - Jiabao Hu
- College of Marine Science, Ningbo University, Ningbo, China; Key Laboratory of Marine Biotechnology of Zhejiang Province, Ningbo University, Ningbo, China; Collaborative Innovation Center for Zhejiang Marine High-efficiency and Healthy Aquaculture, Ningbo, China; Key Laboratory of Applied Marine Biotechnology, Ningbo University, Ministry of Education, Ningbo, China
| | - Yifan Liu
- National Engineering Research Center for Marine Aquaculture, Zhejiang Ocean University, Zhoushan, China
| | - Man Zhang
- College of Marine Science, Ningbo University, Ningbo, China; Key Laboratory of Marine Biotechnology of Zhejiang Province, Ningbo University, Ningbo, China; Collaborative Innovation Center for Zhejiang Marine High-efficiency and Healthy Aquaculture, Ningbo, China; Key Laboratory of Applied Marine Biotechnology, Ningbo University, Ministry of Education, Ningbo, China
| | - Yibo Sun
- College of Marine Science, Ningbo University, Ningbo, China; Key Laboratory of Marine Biotechnology of Zhejiang Province, Ningbo University, Ningbo, China; Collaborative Innovation Center for Zhejiang Marine High-efficiency and Healthy Aquaculture, Ningbo, China; Key Laboratory of Applied Marine Biotechnology, Ningbo University, Ministry of Education, Ningbo, China
| | - Weiwei Gu
- College of Marine Science, Ningbo University, Ningbo, China; Key Laboratory of Marine Biotechnology of Zhejiang Province, Ningbo University, Ningbo, China; Collaborative Innovation Center for Zhejiang Marine High-efficiency and Healthy Aquaculture, Ningbo, China; Key Laboratory of Applied Marine Biotechnology, Ningbo University, Ministry of Education, Ningbo, China
| | - Youyi Zhang
- College of Marine Science, Ningbo University, Ningbo, China; Key Laboratory of Marine Biotechnology of Zhejiang Province, Ningbo University, Ningbo, China; Collaborative Innovation Center for Zhejiang Marine High-efficiency and Healthy Aquaculture, Ningbo, China; Key Laboratory of Applied Marine Biotechnology, Ningbo University, Ministry of Education, Ningbo, China
| | - Jiachu Sun
- College of Marine Science, Ningbo University, Ningbo, China; Key Laboratory of Marine Biotechnology of Zhejiang Province, Ningbo University, Ningbo, China; Collaborative Innovation Center for Zhejiang Marine High-efficiency and Healthy Aquaculture, Ningbo, China; Key Laboratory of Applied Marine Biotechnology, Ningbo University, Ministry of Education, Ningbo, China
| | - Shanliang Xu
- College of Marine Science, Ningbo University, Ningbo, China; Key Laboratory of Marine Biotechnology of Zhejiang Province, Ningbo University, Ningbo, China; Collaborative Innovation Center for Zhejiang Marine High-efficiency and Healthy Aquaculture, Ningbo, China; Key Laboratory of Applied Marine Biotechnology, Ningbo University, Ministry of Education, Ningbo, China
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Cell-free mtDNA level and its biomarker potency for ART outcome are different in follicular fluid of PCOS and non-PCOS women. Mitochondrion 2021; 59:30-36. [PMID: 33839320 DOI: 10.1016/j.mito.2021.04.003] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/25/2020] [Revised: 04/03/2021] [Accepted: 04/05/2021] [Indexed: 11/22/2022]
Abstract
INTRODUCTION Lack of reliable biomarkers for estimating the outcome is one of the current gaps in ART. In this study, we assessed whether cell-free mitochondrial DNA within the follicular fluid (FF cf-mtDNA) of PCOS patients has biomarker applicability or not. Furthermore, probable involved mechanisms in the FF cf-mtDNA pathway were evaluated. METHODS The level of FF cf-mtDNA was compared between 50 PCOS patients and 50 women without any certain reproductive disorder, and analyzed for correlations with ART outcome. The associations between levels of FF cf-mtDNA and TFAM, POLG, and RNase H1 genes expression in mural granulosa cells (MGCs), as well as IL-6, and TNFα in follicular fluid (FF) were assessed. RESULTS We identified that FF cf-mtDNA level was significantly lower in PCOS women and was accompanied by a reduction in the expression of mtDNA biogenesis genes in MGCs of the patients. Although a significant association between FF cf-mtDNA level and ART outcome was observed in the control group, no correlation could be proved in the PCOS group. Moreover, the expression level of TFAM was negatively associated, while amounts of IL-6 and TNFα were positively correlated with FF cf-mtDNA level in both groups. CONCLUSION PCOS patients present a lower FF cf-mtDNA level in comparison with non-PCOS women. FF cf-mtDNA has biomarker applicability for ART outcome in women without any certain reproductive disorder, but not for those with PCOS. It seems that mtDNA packaging dysfunction results in elevated FF cf-mtDNA, and subsequent effects are triggered by increasing the inflammatory cytokines.
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17
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Malott KF, Luderer U. Toxicant effects on mammalian oocyte mitochondria†. Biol Reprod 2021; 104:784-793. [PMID: 33412584 PMCID: PMC8023417 DOI: 10.1093/biolre/ioab002] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2020] [Revised: 09/24/2020] [Accepted: 09/25/2020] [Indexed: 12/28/2022] Open
Abstract
Oocyte mitochondria are unique organelles that establish a founder population in primordial germ cells (PGCs). As the oocyte matures in the postnatal mammalian ovary during folliculogenesis it increases exponentially in volume, and the oocyte mitochondria population proliferates to about 100 000 mitochondria per healthy, mature murine oocyte. The health of the mature oocyte and subsequent embryo is highly dependent on the oocyte mitochondria. Mitochondria are especially sensitive to toxic insults, as they are a major source of reactive oxygen species (ROS), they contain their own DNA (mtDNA) that is unprotected by histone proteins, they contain the electron transport chain that uses electron donors, including oxygen, to generate ATP, and they are important sensors for overall cellular stress. Here we review the effects that toxic insults including chemotherapeutics, toxic metals, plasticizers, pesticides, polycyclic aromatic hydrocarbons (PAHs), and ionizing radiation can have on oocyte mitochondria. This is very clearly a burgeoning field, as our understanding of oocyte mitochondria and metabolism is still relatively new, and we contend much more research is needed to understand the detrimental impacts of exposure to toxicants on oocyte mitochondria. Developing this field further can benefit our understanding of assisted reproductive technologies and the developmental origins of health and disease (DOHaD).
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Affiliation(s)
- Kelli F Malott
- Department of Environmental and Occupational Health, University of California, Irvine, CA 92617, USA
- Department of Medicine, University of California, Irvine CA 92617, USA
| | - Ulrike Luderer
- Department of Environmental and Occupational Health, University of California, Irvine, CA 92617, USA
- Department of Medicine, University of California, Irvine CA 92617, USA
- Developmental and Cell Biology, University of California, Irvine CA 92617, USA
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Chiang JL, Shukla P, Pagidas K, Ahmed NS, Karri S, Gunn DD, Hurd WW, Singh KK. Mitochondria in Ovarian Aging and Reproductive Longevity. Ageing Res Rev 2020; 63:101168. [PMID: 32896666 DOI: 10.1016/j.arr.2020.101168] [Citation(s) in RCA: 71] [Impact Index Per Article: 17.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2020] [Revised: 08/04/2020] [Accepted: 08/27/2020] [Indexed: 01/01/2023]
Abstract
Mitochondrial dysfunction is one of the hallmarks of aging. Consistently mitochondrial DNA (mtDNA) copy number and function decline with age in various tissues. There is increasing evidence to support that mitochondrial dysfunction drives ovarian aging. A decreased mtDNA copy number is also reported during ovarian aging. However, the mitochondrial mechanisms contributing to ovarian aging and infertility are not fully understood. Additionally, investigations into mitochondrial therapies to rejuvenate oocyte quality, select viable embryos and improve mitochondrial function may help enhance fertility or extend reproductive longevity in the future. These therapies include the use of mitochondrial replacement techniques, quantification of mtDNA copy number, and various pharmacologic and lifestyle measures. This review aims to describe the key evidence and current knowledge of the role of mitochondria in ovarian aging and identify the emerging potential options for therapy to extend reproductive longevity and improve fertility.
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Affiliation(s)
- Jasmine L Chiang
- Division of Reproductive Endocrinology & Infertility, University of Alabama at Birmingham, 1700 6(th)Avenue South, Birmingham, AL, 35233, United States
| | - Pallavi Shukla
- Department of Genetics, University of Alabama at Birmingham, Kaul Genetics Building Room 630, 720 20(th)Street South, Birmingham, AL, 35294, United States; Department of Molecular Endocrinology, National Institute for Research in Reproductive Health (NIRRH), Jehangir Merwanji Street, Parel, Mumbai, 400012, India
| | - Kelly Pagidas
- Department of Reproductive Medicine, TCM University, 9 Jason Drive, Lincoln, RI, 02865, United States
| | - Noha S Ahmed
- Department of Genetics, University of Alabama at Birmingham, Kaul Genetics Building Room 630, 720 20(th)Street South, Birmingham, AL, 35294, United States; Department of Dermatology, Zagazig University, 44519 Shaibet an Nakareyah, Zagazig 2, Ash Sharqia Governorate, Egypt
| | - Srinivasu Karri
- Department of Genetics, University of Alabama at Birmingham, Kaul Genetics Building Room 630, 720 20(th)Street South, Birmingham, AL, 35294, United States
| | - Deidre D Gunn
- Division of Reproductive Endocrinology & Infertility, University of Alabama at Birmingham, 1700 6(th)Avenue South, Birmingham, AL, 35233, United States
| | - William W Hurd
- Division of Reproductive Endocrinology & Infertility, University of Alabama at Birmingham, 1700 6(th)Avenue South, Birmingham, AL, 35233, United States
| | - Keshav K Singh
- Department of Genetics, University of Alabama at Birmingham, Kaul Genetics Building Room 630, 720 20(th)Street South, Birmingham, AL, 35294, United States; UAB Department of Genetics, Center for Women's Reproductive Health, Kaul Genetics Building University of Alabama at Birmingham, Room 620, 720 20(th)Street South, Birmingham, AL, 35294, United States.
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