1
|
Speckhart SL, Oliver MA, Keane JA, Dias NW, Mercadante VRG, Biase FH, Ealy AD. Interleukin-6 supplementation improves bovine conceptus elongation and transcriptomic indicators of developmental competence†. Biol Reprod 2024; 111:43-53. [PMID: 38519105 PMCID: PMC11247277 DOI: 10.1093/biolre/ioae045] [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: 08/24/2023] [Revised: 12/15/2023] [Accepted: 03/15/2024] [Indexed: 03/24/2024] Open
Abstract
A high incidence of pregnancy failures occurs in cattle during the second week of pregnancy as blastocysts transition into an elongated conceptus. This work explored whether interleukin-6 supplementation during in vitro embryo production would improve subsequent conceptus development. Bovine embryos were treated with 0 or 100 ng/mL recombinant bovine interleukin-6 beginning on day 5 post-fertilization. At day 7.5 post-fertilization, blastocysts were transferred into estrus synchronized beef cows (n = 5 recipients/treatment, 10 embryos/recipient). Seven days after transfer (day 14.5), cows were euthanized to harvest reproductive tracts and collect conceptuses. Individual conceptus lengths and stages were recorded before processing for RNA sequencing. Increases in conceptus recovery, length, and the proportion of tubular and filamentous conceptuses were detected in conceptuses derived from interleukin-6-treated embryos. The interleukin-6 treatment generated 591 differentially expressed genes in conceptuses (n = 9-10/treatment). Gene ontology enrichment analyses revealed changes in transcriptional regulation, DNA-binding, and antiviral actions. Only a few differentially expressed genes were associated with extraembryonic development, but several differentially expressed genes were associated with embryonic regulation of transcription, mesoderm and ectoderm development, organogenesis, limb formation, and somatogenesis. To conclude, this work provides evidence that interleukin-6 treatment before embryo transfer promotes pre-implantation conceptus development and gene expression in ways that resemble the generation of a robust conceptus containing favorable abilities to survive this critical period of pregnancy.
Collapse
Affiliation(s)
- Savannah L Speckhart
- School of Animal Sciences, Virginia Polytechnic Institute and State University, Blacksburg, VA, USA
| | - Mary A Oliver
- School of Animal Sciences, Virginia Polytechnic Institute and State University, Blacksburg, VA, USA
| | - Jessica A Keane
- School of Animal Sciences, Virginia Polytechnic Institute and State University, Blacksburg, VA, USA
| | - Nicholas W Dias
- School of Animal Sciences, Virginia Polytechnic Institute and State University, Blacksburg, VA, USA
| | - Vitor R G Mercadante
- School of Animal Sciences, Virginia Polytechnic Institute and State University, Blacksburg, VA, USA
| | - Fernando H Biase
- School of Animal Sciences, Virginia Polytechnic Institute and State University, Blacksburg, VA, USA
| | - Alan D Ealy
- School of Animal Sciences, Virginia Polytechnic Institute and State University, Blacksburg, VA, USA
| |
Collapse
|
2
|
Huang R, Kratka CE, Pea J, McCann C, Nelson J, Bryan JP, Zhou LT, Russo DD, Zaniker EJ, Gandhi AH, Shalek AK, Cleary B, Farhi SL, Duncan FE, Goods BA. Single-cell and spatiotemporal profile of ovulation in the mouse ovary. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2024:2024.05.20.594719. [PMID: 38826447 PMCID: PMC11142086 DOI: 10.1101/2024.05.20.594719] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2024]
Abstract
Ovulation is a spatiotemporally coordinated process that involves several tightly controlled events, including oocyte meiotic maturation, cumulus expansion, follicle wall rupture and repair, and ovarian stroma remodeling. To date, no studies have detailed the precise window of ovulation at single-cell resolution. Here, we performed parallel single-cell RNA-seq and spatial transcriptomics on paired mouse ovaries across an ovulation time course to map the spatiotemporal profile of ovarian cell types. We show that major ovarian cell types exhibit time-dependent transcriptional states enriched for distinct functions and have specific localization profiles within the ovary. We also identified gene markers for ovulation-dependent cell states and validated these using orthogonal methods. Finally, we performed cell-cell interaction analyses to identify ligand-receptor pairs that may drive ovulation, revealing previously unappreciated interactions. Taken together, our data provides a rich and comprehensive resource of murine ovulation that can be mined for discovery by the scientific community.
Collapse
|
3
|
Tang Y, Lu S, Wei J, Xu R, Zhang H, Wei Q, Han B, Gao Y, Zhao X, Peng S, Pan M, Ma B. Growth differentiation factor 9 regulates the expression of estrogen receptors via Smad2/3 signaling in goat cumulus cells. Theriogenology 2024; 219:65-74. [PMID: 38402699 DOI: 10.1016/j.theriogenology.2024.02.021] [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: 10/09/2023] [Revised: 01/04/2024] [Accepted: 02/20/2024] [Indexed: 02/27/2024]
Abstract
Both oocyte secretory factors (OSFs) and estrogen are essential for the development and function of mammalian ovarian follicles, playing synergistic role in regulating oocyte growth. OSFs can significantly affect the biological processes regulated by estrogen in cumulus cells (CCs). It is a scientific question worth investigating whether oocyte secretory factors can influence the expression of estrogen receptors in CCs. In our study, we observed a significant increase in the mRNA and protein expressions of estrogen receptor β (Esr2/ERβ) and G-protein-coupled estrogen receptor (GPER) in cumulus cells of goat cumulus-oocyte complexes (COCs) cultured in vitro for 6 h. Furthermore, the addition of 10 ng/mL growth-differentiation factor 9 (GDF9) and 5 ng/mL bone morphogenetic protein 15 (BMP15) to the culture medium of goat COCs resulted in a significant increase in the expressions of ERβ and GPER in cumulus cells. To explore the mechanism further, we performed micromanipulation to remove oocyte contents and co-cultured the oocytectomized complexes (OOXs) with denuded oocytes (DOs) or GDF9/BMP15. The expressions of ERβ and GPER in the co-culture groups were significantly higher than those in the OOXs group, but there was no difference compared to the COCs group. Mechanistically, we found that SB431542 (inhibitor of GDF9 bioactivity), but not LDN193189 (inhibitor of BMP15 bioactivity), abolished the upregulation of ERβ and GPER in cumulus cells and the activation of Smad2/3 signaling. In conclusion, our results demonstrate that the oocyte secretory factor GDF9 promotes the activation of Smad2/3 signaling in cumulus cells during goat COCs culture in vitro, and the phosphorylation of Smad2/3 induces the expression of estrogen receptors ERβ and GPER in cumulus cells.
Collapse
Affiliation(s)
- Yaju Tang
- Key Laboratory of Animal Biotechnology, Ministry of Agriculture, College of Veterinary Medicine, Northwest A&F University, Yangling, 712100, Shaanxi, PR China
| | - Sihai Lu
- Key Laboratory of Animal Biotechnology, Ministry of Agriculture, College of Veterinary Medicine, Northwest A&F University, Yangling, 712100, Shaanxi, PR China
| | - Juncai Wei
- Key Laboratory of Animal Biotechnology, Ministry of Agriculture, College of Veterinary Medicine, Northwest A&F University, Yangling, 712100, Shaanxi, PR China
| | - Rui Xu
- Key Laboratory of Animal Biotechnology, Ministry of Agriculture, College of Veterinary Medicine, Northwest A&F University, Yangling, 712100, Shaanxi, PR China
| | - Hui Zhang
- Key Laboratory of Animal Biotechnology, Ministry of Agriculture, College of Veterinary Medicine, Northwest A&F University, Yangling, 712100, Shaanxi, PR China
| | - Qiang Wei
- Key Laboratory of Animal Biotechnology, Ministry of Agriculture, College of Veterinary Medicine, Northwest A&F University, Yangling, 712100, Shaanxi, PR China
| | - Bin Han
- Yulin Animal Husbandry and Veterinary Service Center, Yulin, 719000, Shaanxi, PR China
| | - Yan Gao
- Yulin Animal Husbandry and Veterinary Service Center, Yulin, 719000, Shaanxi, PR China
| | - Xiaoe Zhao
- Key Laboratory of Animal Biotechnology, Ministry of Agriculture, College of Veterinary Medicine, Northwest A&F University, Yangling, 712100, Shaanxi, PR China
| | - Sha Peng
- Key Laboratory of Animal Biotechnology, Ministry of Agriculture, College of Veterinary Medicine, Northwest A&F University, Yangling, 712100, Shaanxi, PR China
| | - Menghao Pan
- Key Laboratory of Animal Biotechnology, Ministry of Agriculture, College of Veterinary Medicine, Northwest A&F University, Yangling, 712100, Shaanxi, PR China
| | - Baohua Ma
- Key Laboratory of Animal Biotechnology, Ministry of Agriculture, College of Veterinary Medicine, Northwest A&F University, Yangling, 712100, Shaanxi, PR China.
| |
Collapse
|
4
|
Rosa PMDS, Guedes PHE, Garcia JM, Oliveira CS. Cytoplasmic granules in bovine oocytes do not affect embryonic or fetal development. ZYGOTE 2024; 32:28-37. [PMID: 38047350 DOI: 10.1017/s0967199423000576] [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] [Indexed: 12/05/2023]
Abstract
Oocyte cytoplasmic evaluation is based on homogeneity and granular appearance. Our study investigated if a granular cytoplasm, highly heterogeneous, would affect oocyte competence in bovine. In two experiments, bovine cumulus-oocyte complexes (COCs) with homogeneous cytoplasm (control, CC) and granulated cytoplasm (granular, GC) were selected from a regular pool of COCs. Experiment 1 was performed with slaughterhouse ovaries, and Experiment 2 was carried out in Girolando COCs obtained from ovum pick-up. Granular oocytes had higher caspase 3 levels (66.17 ± 11.61 vs 172.08 ± 16.95, P < 0.01) and similar GAP junction activity (5.64 ± 0.45 vs 6.29 ± 0.29). ZAR1 relative mRNA amount was lower in granular oocytes (178.27 ± 151.63 vs 0.89 ± 0.89, P = 0.01) and no effect was detected for MATER, PPP2R1A, ENY2, IGF2R, and BMP15 genes. Despite molecular differences, no detrimental effect was detected on oocyte competence in GC oocytes. Cleavage (Experiment 1: 59.52 ± 7.21% vs 59.79 ± 6.10% and Experiment 2: 68.88 ± 4.82 vs 74.41 ± 5.89%) and blastocyst (Experiment 1: 29.28 ± 4.14% vs 23.15 ± 2.96% and Experiment 2: 21.11 ± 3.28% vs 21.02 ± 6.08%) rates were similar between CC and GC (Experiments 1 and 2, respectively). Post-transfer embryo development revealed that pregnancy (CC: 24.27 ± 9.70% vs GC: 26.31 ± 7.23%) and calving (23.68% vs 33.33%) rates and fetal growth were not affected by the presence of cytoplasmic granules. Our results demonstrated that oocytes with granular cytoplasm present equivalent efficiency for IVF and calf production compared with homogenous cytoplasm oocytes. This could be observed through similar cleavage, blastocyst rates, and fetal growth development. In addition to differences in oocyte gene expression related to oocyte quality, it seems not to affect oocyte developmental competence.
Collapse
Affiliation(s)
- Paola Maria da Silva Rosa
- Embrapa Dairy Cattle, 610 Eugenio do Nascimento Ave, Juiz de Fora, MG, Brazil36038-330
- Department of Preventive Veterinary Medicine and Animal Reproduction, São Paulo State University, Jaboticabal, SP14884-900, Brazil
| | | | - Joaquim Mansano Garcia
- Department of Preventive Veterinary Medicine and Animal Reproduction, São Paulo State University, Jaboticabal, SP14884-900, Brazil
| | - Clara Slade Oliveira
- Embrapa Dairy Cattle, 610 Eugenio do Nascimento Ave, Juiz de Fora, MG, Brazil36038-330
- Department of Preventive Veterinary Medicine and Animal Reproduction, São Paulo State University, Jaboticabal, SP14884-900, Brazil
| |
Collapse
|
5
|
Ji H, Zhang Q, Ding L, Chen R, Liu F, Li P. Structural and metabolic cumulus cell alteration affects oocyte quality in underweight women. ZYGOTE 2024; 32:77-86. [PMID: 38130161 DOI: 10.1017/s0967199423000588] [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] [Indexed: 12/23/2023]
Abstract
This study aimed to investigate the structural and metabolic changes in cumulus cells of underweight women and their effects on oocyte maturation and fertilization. The cytoplasmic ultrastructure was analyzed by electron microscopy, mitochondrial membrane potential by immunofluorescence, and mitochondrial DNA copy number by relative quantitative polymerase chain reaction. The expression of various proteins including the oxidative stress-derived product 4-hydroxynonenal (4-HNE) and autophagy and apoptosis markers such as Vps34, Atg-5, Beclin 1, Lc3-I, II, Bax, and Bcl-2 was assessed and compared between groups. Oocyte maturation and fertilization rates were lower in underweight women (P < 0.05), who presented with cumulus cells showing abnormal mitochondrial morphology and increased cell autophagy. Compared with the mitochondrial DNA copies of the control group, those of the underweight group increased but not significantly. The mitochondrial membrane potential was similar between the groups (P = 0.8). Vps34, Atg-5, Lc3-II, Bax, and Bcl-2 expression and 4-HNE levels were higher in the underweight group compared with the control group (P < 0.01); however, the Bax/Bcl-2 ratio was lower in the underweight group compared with the control group (P = 0.031). Additionally, Beclin 1 protein levels were higher in the underweight group compared with the control group but without statistical significance. In conclusion, malnutrition and other conditions in underweight women may adversely affect ovulation, and the development, and fertilization of oocytes resulting from changes to the intracellular structure of cumulus cells and metabolic processes. These changes may lead to reduced fertility or unsatisfactory reproduction outcomes in women.
Collapse
Affiliation(s)
- Hong Ji
- Department of Reproductive Medicine, Women and Children's Hospital, School of Medicine, Xiamen University, Zhenhai Road 10, 361003 Xiamen, Fujian Province, People's Republic of China
- Xiamen Key Laboratory of Reproduction and Genetics, Zhenhai Road 10, 361003, Xiamen, Fujian Province, People's Republic of China
| | - Qing Zhang
- Department of Reproductive Medicine, Women and Children's Hospital, School of Medicine, Xiamen University, Zhenhai Road 10, 361003 Xiamen, Fujian Province, People's Republic of China
- Xiamen Key Laboratory of Reproduction and Genetics, Zhenhai Road 10, 361003, Xiamen, Fujian Province, People's Republic of China
| | - Lu Ding
- Department of Reproductive Medicine, Women and Children's Hospital, School of Medicine, Xiamen University, Zhenhai Road 10, 361003 Xiamen, Fujian Province, People's Republic of China
- Xiamen Key Laboratory of Reproduction and Genetics, Zhenhai Road 10, 361003, Xiamen, Fujian Province, People's Republic of China
| | - Rongjuan Chen
- Department of Reproductive Medicine, Women and Children's Hospital, School of Medicine, Xiamen University, Zhenhai Road 10, 361003 Xiamen, Fujian Province, People's Republic of China
- Xiamen Key Laboratory of Reproduction and Genetics, Zhenhai Road 10, 361003, Xiamen, Fujian Province, People's Republic of China
| | - Fu Liu
- Department of Human Anatomy and Histoembryology, Xiamen Medical College, Guankou Middle Road 1999, 361023, Xiamen, Fujian Province, People's Republic of China
| | - Ping Li
- Department of Reproductive Medicine, Women and Children's Hospital, School of Medicine, Xiamen University, Zhenhai Road 10, 361003 Xiamen, Fujian Province, People's Republic of China
- Xiamen Key Laboratory of Reproduction and Genetics, Zhenhai Road 10, 361003, Xiamen, Fujian Province, People's Republic of China
| |
Collapse
|
6
|
Song Y, Zhang N, Zhang Y, Wang J, Lv Q, Zhang J. Single-Cell Transcriptome Analysis Reveals Development-Specific Networks at Distinct Synchronized Antral Follicle Sizes in Sheep Oocytes. Int J Mol Sci 2024; 25:910. [PMID: 38255985 PMCID: PMC10815039 DOI: 10.3390/ijms25020910] [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: 12/13/2023] [Revised: 01/08/2024] [Accepted: 01/09/2024] [Indexed: 01/24/2024] Open
Abstract
The development of the ovarian antral follicle is a complex, highly regulated process. Oocytes orchestrate and coordinate the development of mammalian ovarian follicles, and the rate of follicular development is governed by a developmental program intrinsic to the oocyte. Characterizing oocyte signatures during this dynamic process is critical for understanding oocyte maturation and follicular development. Although the transcriptional signature of sheep oocytes matured in vitro and preovulatory oocytes have been previously described, the transcriptional changes of oocytes in antral follicles have not. Here, we used single-cell transcriptomics (SmartSeq2) to characterize sheep oocytes from small, medium, and large antral follicles. We characterized the transcriptomic landscape of sheep oocytes during antral follicle development, identifying unique features in the transcriptional atlas, stage-specific molecular signatures, oocyte-secreted factors, and transcription factor networks. Notably, we identified the specific expression of 222 genes in the LO, 8 and 6 genes that were stage-specific in the MO and SO, respectively. We also elucidated signaling pathways in each antral follicle size that may reflect oocyte quality and in vitro maturation competency. Additionally, we discovered key biological processes that drive the transition from small to large antral follicles, revealing hub genes involved in follicle recruitment and selection. Thus, our work provides a comprehensive characterization of the single-oocyte transcriptome, filling a gap in the mapping of the molecular landscape of sheep oogenesis. We also provide key insights into the transcriptional regulation of the critical sizes of antral follicular development, which is essential for understanding how the oocyte orchestrates follicular development.
Collapse
Affiliation(s)
| | | | | | | | | | - Jiaxin Zhang
- Inner Mongolia Key Laboratory of Sheep & Goat Genetics Breeding and Reproduction, College of Animal Science, Inner Mongolia Agricultural University, Hohhot 010018, China; (Y.S.)
| |
Collapse
|
7
|
Tsuyuzaki K, Ishii M, Nikaido I. Sctensor detects many-to-many cell-cell interactions from single cell RNA-sequencing data. BMC Bioinformatics 2023; 24:420. [PMID: 37936079 PMCID: PMC10631077 DOI: 10.1186/s12859-023-05490-y] [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: 07/05/2023] [Accepted: 09/21/2023] [Indexed: 11/09/2023] Open
Abstract
BACKGROUND Complex biological systems are described as a multitude of cell-cell interactions (CCIs). Recent single-cell RNA-sequencing studies focus on CCIs based on ligand-receptor (L-R) gene co-expression but the analytical methods are not appropriate to detect many-to-many CCIs. RESULTS In this work, we propose scTensor, a novel method for extracting representative triadic relationships (or hypergraphs), which include ligand-expression, receptor-expression, and related L-R pairs. CONCLUSIONS Through extensive studies with simulated and empirical datasets, we have shown that scTensor can detect some hypergraphs that cannot be detected using conventional CCI detection methods, especially when they include many-to-many relationships. scTensor is implemented as a freely available R/Bioconductor package.
Collapse
Affiliation(s)
- Koki Tsuyuzaki
- Laboratory for Bioinformatics Research RIKEN Center for Biosystems Dynamics Research, 2-1 Hirosawa, Wako, Saitama, 351-0198, Japan.
- Japan Science and Technology Agency, PRESTO, 7 Gobancho, Chiyoda-ku, Tokyo, 102-0076, Japan.
| | - Manabu Ishii
- Laboratory for Bioinformatics Research RIKEN Center for Biosystems Dynamics Research, 2-1 Hirosawa, Wako, Saitama, 351-0198, Japan
| | - Itoshi Nikaido
- Laboratory for Bioinformatics Research RIKEN Center for Biosystems Dynamics Research, 2-1 Hirosawa, Wako, Saitama, 351-0198, Japan.
- Department of Functional Genome Informatics, Division of Biological Data Science, Medical Research Institute, Tokyo Medical and Dental University (TMDU), 1-5-45 Yushima, Bunkyo-ku, Tokyo, 113-8510, Japan.
| |
Collapse
|
8
|
Wang Y, Qi JJ, Yin YJ, Jiang H, Zhang JB, Liang S, Yuan B. Ferulic Acid Enhances Oocyte Maturation and the Subsequent Development of Bovine Oocytes. Int J Mol Sci 2023; 24:14804. [PMID: 37834252 PMCID: PMC10573426 DOI: 10.3390/ijms241914804] [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: 08/08/2023] [Revised: 09/19/2023] [Accepted: 09/29/2023] [Indexed: 10/15/2023] Open
Abstract
Improving the quality of oocytes matured in vitro is integral to enhancing the efficacy of in vitro embryo production. Oxidative stress is one of the primary causes of quality decline in oocytes matured in vitro. In this study, ferulic acid (FA), a natural antioxidant found in plant cell walls, was investigated to evaluate its impact on bovine oocyte maturation and subsequent embryonic development. Bovine cumulus-oocyte complexes (COCs) were treated with different concentrations of FA (0, 2.5, 5, 10, 20 μM) during in vitro maturation (IVM). Compared to the control group, supplementation with 5 μM FA significantly enhanced the maturation rates of bovine oocytes and the expansion of the cumulus cells area, as well as the subsequent cleavage and blastocyst formation rates after in vitro fertilization (IVF) and somatic cell nuclear transfer (SCNT). Furthermore, FA supplementation was observed to effectively decrease the levels of ROS in bovine oocytes and improve their mitochondrial function. Our experiments demonstrate that FA can maintain the levels of antioxidants (GSH, SOD, CAT) in oocytes, thereby alleviating the oxidative stress induced by H2O2. RT-qPCR results revealed that, after FA treatment, the relative mRNA expression levels of genes related to oocyte maturation (GDF-9 and BMP-15), cumulus cell expansion (HAS2, PTX3, CX37, and CX43), and embryo pluripotency (OCT4, SOX2, and CDX2) were significantly increased. In conclusion, these findings demonstrate that FA supplementation during bovine oocyte IVM can enhance oocyte quality and the developmental potential of subsequent embryos.
Collapse
Affiliation(s)
| | | | | | | | | | - Shuang Liang
- Department of Animals Sciences, College of Animal Sciences, Jilin University, Changchun 130062, China; (Y.W.); (J.-J.Q.); (Y.-J.Y.); (H.J.); (J.-B.Z.)
| | - Bao Yuan
- Department of Animals Sciences, College of Animal Sciences, Jilin University, Changchun 130062, China; (Y.W.); (J.-J.Q.); (Y.-J.Y.); (H.J.); (J.-B.Z.)
| |
Collapse
|
9
|
de la Fuente A, Scoggin C, Bradecamp E, Martin-Pelaez S, van Heule M, Troedsson M, Daels P, Meyers S, Dini P. Transcriptome Signature of Immature and In Vitro-Matured Equine Cumulus-Oocytes Complex. Int J Mol Sci 2023; 24:13718. [PMID: 37762020 PMCID: PMC10531358 DOI: 10.3390/ijms241813718] [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: 08/17/2023] [Revised: 08/31/2023] [Accepted: 09/04/2023] [Indexed: 09/29/2023] Open
Abstract
Maturation is a critical step in the development of an oocyte, and it is during this time that the oocyte advances to metaphase II (MII) of the meiotic cycle and acquires developmental competence to be fertilized and become an embryo. However, in vitro maturation (IVM) remains one of the limiting steps in the in vitro production of embryos (IVP), with a variable percentage of oocytes reaching the MII stage and unpredictable levels of developmental competence. Understanding the dynamics of oocyte maturation is essential for the optimization of IVM culture conditions and subsequent IVP outcomes. Thus, the aim of this study was to elucidate the transcriptome dynamics of oocyte maturation by comparing transcriptomic changes during in vitro maturation in both oocytes and their surrounding cumulus cells. Cumulus-oocyte complexes were obtained from antral follicles and divided into two groups: immature and in vitro-matured (MII). RNA was extracted separately from oocytes (OC) and cumulus cells (CC), followed by library preparation and RNA sequencing. A total of 13,918 gene transcripts were identified in OC, with 538 differentially expressed genes (DEG) between immature OC and in vitro-matured OC. In CC, 13,104 genes were expressed with 871 DEG. Gene ontology (GO) analysis showed an association between the DEGs and pathways relating to nuclear maturation in OC and GTPase activity, extracellular matrix organization, and collagen trimers in CC. Additionally, the follicle-stimulating hormone receptor gene (FSHR) and luteinizing hormone/choriogonadotropin receptor gene (LHCGR) showed differential expressions between CC-MII and immature CC samples. Overall, these results serve as a foundation to further investigate the biological pathways relevant to oocyte maturation in horses and pave the road to improve the IVP outcomes and the overall clinical management of equine assisted reproductive technologies (ART).
Collapse
Affiliation(s)
- Alejandro de la Fuente
- Department of Anatomy, Physiology and Cell Biology, School of Veterinary Medicine, University of California, Davis, CA 95616, USA
- Department of Population Health and Reproduction, School of Veterinary Medicine, University of California, Davis, CA 95616, USA
| | - Charles Scoggin
- LeBlanc Reproduction Center, Rood and Riddle Equine Hospital, Lexington, KY 40511, USA
| | - Etta Bradecamp
- LeBlanc Reproduction Center, Rood and Riddle Equine Hospital, Lexington, KY 40511, USA
| | - Soledad Martin-Pelaez
- Department of Population Health and Reproduction, School of Veterinary Medicine, University of California, Davis, CA 95616, USA
| | - Machteld van Heule
- Department of Population Health and Reproduction, School of Veterinary Medicine, University of California, Davis, CA 95616, USA
- Department of Morphology, Imaging, Orthopedics, Rehabilitation and Nutrition, Faculty of Veterinary Medicine, University of Ghent, 9820 Merelbeke, Belgium
| | - Mats Troedsson
- Gluck Equine Research Center, University of Kentucky, Lexington, KY 40506, USA
| | - Peter Daels
- Department of Morphology, Imaging, Orthopedics, Rehabilitation and Nutrition, Faculty of Veterinary Medicine, University of Ghent, 9820 Merelbeke, Belgium
| | - Stuart Meyers
- Department of Anatomy, Physiology and Cell Biology, School of Veterinary Medicine, University of California, Davis, CA 95616, USA
| | - Pouya Dini
- Department of Population Health and Reproduction, School of Veterinary Medicine, University of California, Davis, CA 95616, USA
| |
Collapse
|
10
|
Sgueglia G, Longobardi S, Valerio D, Campitiello MR, Colacurci N, Di Pietro C, Battaglia R, D'Hooghe T, Altucci L, Dell'Aversana C. The impact of epigenetic landscape on ovarian cells in infertile older women undergoing IVF procedures. Clin Epigenetics 2023; 15:76. [PMID: 37143127 PMCID: PMC10161563 DOI: 10.1186/s13148-023-01490-0] [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: 02/28/2023] [Accepted: 04/24/2023] [Indexed: 05/06/2023] Open
Abstract
The constant decline in fertility and older reproductive age is the major cause of low clinical pregnancy rates in industrialised countries. Epigenetic mechanisms impact on proper embryonic development in women undergoing in vitro fertilisation (IVF) protocols. Here, we describe the main epigenetic modifications that may influence female reproduction and could affect IVF success.
Collapse
Affiliation(s)
- Giulia Sgueglia
- Department of Precision Medicine, University of Campania 'Luigi Vanvitelli', Programma di Epigenetica Medica, Azienda Ospedaliera Universitaria, Naples, Italy
| | | | - Domenico Valerio
- Outpatient Fertility Unit, University of Campania 'Luigi Vanvitelli', 80138, Naples, Italy
| | - Maria Rosaria Campitiello
- Department of Obstetrics and Gynecology and Physiopathology of Human Reproduction, ASL Salerno, Salerno, Italy
| | - Nicola Colacurci
- Outpatient Fertility Unit, University of Campania 'Luigi Vanvitelli', 80138, Naples, Italy
- Department of Woman, Child and General and Special Surgery, University of Campania 'Luigi Vanvitelli', 80138, Naples, Italy
| | - Cinzia Di Pietro
- Department of Biomedical and Biotechnological Sciences, Section of Biology and Genetics "Giovanni Sichel", University of Catania, 95123, Catania, CT, Italy
| | - Rosalia Battaglia
- Department of Biomedical and Biotechnological Sciences, Section of Biology and Genetics "Giovanni Sichel", University of Catania, 95123, Catania, CT, Italy
| | | | - Lucia Altucci
- Department of Precision Medicine, University of Campania 'Luigi Vanvitelli', Programma di Epigenetica Medica, Azienda Ospedaliera Universitaria, Naples, Italy.
- BIOGEM, Ariano Irpino, Italy.
- Institute of Experimental Endocrinology and Oncology 'Gaetano Salvatore' (IEOS)-National Research Council (CNR), Naples, Italy.
| | - Carmela Dell'Aversana
- Department of Precision Medicine, University of Campania 'Luigi Vanvitelli', Programma di Epigenetica Medica, Azienda Ospedaliera Universitaria, Naples, Italy.
- Institute of Experimental Endocrinology and Oncology 'Gaetano Salvatore' (IEOS)-National Research Council (CNR), Naples, Italy.
| |
Collapse
|
11
|
Wen X, Yang Q, Sun D, Jiang ZY, Wang T, Liu HR, Han Z, Wang L, Liang CG. Cumulus Cells Accelerate Postovulatory Oocyte Aging through IL1-IL1R1 Interaction in Mice. Int J Mol Sci 2023; 24:ijms24043530. [PMID: 36834943 PMCID: PMC9959314 DOI: 10.3390/ijms24043530] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2022] [Revised: 02/05/2023] [Accepted: 02/07/2023] [Indexed: 02/12/2023] Open
Abstract
The oocytes of female mammals will undergo aging after ovulation, also known as postovulatory oocyte aging (POA). Until now, the mechanisms of POA have not been fully understood. Although studies have shown that cumulus cells accelerate POA over time, the exact relationship between the two is still unclear. In the study, by employing the methods of mouse cumulus cells and oocytes transcriptome sequencing and experimental verification, we revealed the unique characteristics of cumulus cells and oocytes through ligand-receptor interactions. The results indicate that cumulus cells activated NF-κB signaling in oocytes through the IL1-IL1R1 interaction. Furthermore, it promoted mitochondrial dysfunction, excessive ROS accumulation, and increased early apoptosis, ultimately leading to a decline in the oocyte quality and the appearance of POA. Our results indicate that cumulus cells have a role in accelerating POA, and this result lays a foundation for an in-depth understanding of the molecular mechanism of POA. Moreover, it provides clues for exploring the relationship between cumulus cells and oocytes.
Collapse
|
12
|
Forni G, Mikheyev AS, Luchetti A, Mantovani B. Gene transcriptional profiles in gonads of Bacillus taxa (Phasmida) with different cytological mechanisms of automictic parthenogenesis. ZOOLOGICAL LETTERS 2022; 8:14. [PMID: 36435814 PMCID: PMC9701443 DOI: 10.1186/s40851-022-00197-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/21/2022] [Accepted: 10/07/2022] [Indexed: 06/16/2023]
Abstract
The evolution of automixis - i.e., meiotic parthenogenesis - requires several features, including ploidy restoration after meiosis and maintenance of fertility. Characterizing the relative contribution of novel versus pre-existing genes and the similarities in their expression and sequence evolution is fundamental to understand the evolution of reproductive novelties. Here we identify gonads-biased genes in two Bacillus automictic stick-insects and compare their expression profile and sequence evolution with a bisexual congeneric species. The two parthenogens restore ploidy through different cytological mechanisms: in Bacillus atticus, nuclei derived from the first meiotic division fuse to restore a diploid egg nucleus, while in Bacillus rossius, diploidization occurs in some cells of the haploid blastula through anaphase restitution. Parthenogens' gonads transcriptional program is found to be largely assembled from genes that were already present before the establishment of automixis. The three species transcriptional profiles largely reflect their phyletic relationships, yet we identify a shared core of genes with gonad-biased patterns of expression in parthenogens which are either male gonads-biased in the sexual species or are not differentially expressed there. At the sequence level, just a handful of gonads-biased genes were inferred to have undergone instances of positive selection exclusively in the parthenogen species. This work is the first to explore the molecular underpinnings of automixis in a comparative framework: it delineates how reproductive novelties can be sustained by genes whose origin precedes the establishment of the novelty itself and shows that different meiotic mechanisms of reproduction can be associated with a shared molecular ground plan.
Collapse
Affiliation(s)
- Giobbe Forni
- Dip. Scienze Biologiche, Geologiche e Ambientali (BiGeA), University of Bologna, 40126, Bologna, Italy
- Dip. Scienze Agrarie e Ambientali, University of Milano, Milano, Italy
| | - Alexander S Mikheyev
- Australian National University, ACT, Canberra, 2600, Australia
- Okinawa Institute of Science and Technology, 1919-1 Tancha, Onna-son, Okinawa, 904-0495, Japan
| | - Andrea Luchetti
- Dip. Scienze Biologiche, Geologiche e Ambientali (BiGeA), University of Bologna, 40126, Bologna, Italy.
| | - Barbara Mantovani
- Dip. Scienze Biologiche, Geologiche e Ambientali (BiGeA), University of Bologna, 40126, Bologna, Italy
| |
Collapse
|
13
|
N-Acetyl cysteine reduces the levels of reactive oxygen species and improves in vitro maturation of oocytes from medium-sized bovine antral follicles. ZYGOTE 2022; 30:882-890. [PMID: 36148786 DOI: 10.1017/s0967199422000429] [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: 11/05/2022]
Abstract
This study aims to evaluate the effects of N-acetylcysteine (NAC) on bovine oocyte maturation, mitochondrial activity and transzonal projections (TZP), as well as on the levels of reactive oxygen species (ROS) and messenger RNA (mRNA) for catalase (CAT) superoxide dismutase (SOD), periredoxin-6 (Prdx6), glutathione peroxidase (GPx), growth and differentiation factor-9 (GDF9), histone H1Foo, cyclin B1 (CCNB1) and c-Mos. Bovine cumulus-oocyte complexes (COC) of medium-sized antral follicles (3.0-6.0 mm) were prematured in TCM-199 for 8 h at 38.5°C in 5% CO2. After prematuration in the presence of forskolin and C-type natriuretic peptide, COCs were matured in TCM-199 alone or with 0.1, 0.5 or 2.5 mM NAC. Then, oocytes were classified according to the stage of chromatin. Furthermore, mitochondrial activity and intracellular levels of ROS and TZP were also evaluated. The levels of mRNAs for CAT, SOD, Prdx6, GPx, GDF9, H1Foo, CCNB1 and c-Mos were evaluated using real-time polymerase chain reaction (RT-PCR). The results showed that NAC significantly increased the percentages of oocytes with resumption of meiosis when compared with those oocytes matured in control medium. Oocytes had homogeneous mitochondrial distribution, and those cultured with 0.1 and 0.5 mM NAC had lower levels of ROS when compared with the control. In addition, 0.5 mM NAC reduced TZP and the levels of mRNA for CCNB1. In contrast, NAC did not influence the expression of CAT, GPx, Prdx6, SOD, GDF9, H1Foo, and c-Mos. In conclusion, 0.5 mM NAC reduced the levels of ROS, TZP and mRNA for CCNB1, and improved in vitro resumption of meiosis in oocytes from medium-sized bovine antral follicles.
Collapse
|
14
|
Zhao L, Pan Y, Wang M, Wang J, Wang Y, Han X, Wang J, Zhang T, Zhao T, He H, Cui Y, Yu S. Integrated analysis of the expression profiles of the lncRNA-miRNA-mRNA ceRNA network in granulosa and cumulus cells from yak ovaries. BMC Genomics 2022; 23:633. [PMID: 36057545 PMCID: PMC9441039 DOI: 10.1186/s12864-022-08848-3] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2022] [Accepted: 08/16/2022] [Indexed: 11/10/2022] Open
Abstract
Background Growing oocytes acquire the ability to mature through two-way communication between gametes and surrounding somatic cumulus cells (CCs). Granulosa cells (GCs) support oocyte growth, regulate meiosis progression, and modulate global oocyte transcription activity. However, the proliferation and differentiation of the yak ovary in GCs and CCs remain unclear. To characterize the important roles of long non-coding RNA, (lncRNA), microRNA (miRNA), and messenger RNA (mRNA), whole-transcriptome analysis was performed. Real-time quantitative fluorescence PCR was performed to verify the selected RNA sequences. Results Important gene ontology terms and Kyoto Encyclopedia of Genes and Genomes pathways related to differentiation and oocyte development were identified for the target genes of differentially expressed lncRNAs, miRNAs, and mRNAs. In total,6223 mRNAs (2197 upregulated, 4026 downregulated), 643 lncRNAs (204 upregulated, 479 downregulated), and 559 miRNAs (311 upregulated, 248 downregulated) were significantly altered between the two groups. Target genes involved in cell adhesion, cell differentiation, regulation of developmental processes, cell proliferation, embryo development, signal transduction, apoptosis, and aromatic compound biosynthetic processes were significantly enriched. These RNAs were involved in ECM-receptor interaction, MAPK signaling, Hippo signaling, PI3K-Akt signaling, cell cycle, cell adhesion, leukocyte trans-endothelial migration, and actin cytoskeleton regulation. Conclusions A comprehensive analysis of the co-expression network of competing endogenous RNAs (ceRNAs) will facilitate the understanding of the process of granulosa cell proliferation and differentiation and offer a theoretical basis for the development of oocytes. Supplementary Information The online version contains supplementary material available at 10.1186/s12864-022-08848-3.
Collapse
Affiliation(s)
- Ling Zhao
- College of Veterinary Medicine, Gansu Agricultural University, Lanzhou, 730070, China
| | - Yangyang Pan
- College of Veterinary Medicine, Gansu Agricultural University, Lanzhou, 730070, China
| | - Meng Wang
- College of Veterinary Medicine, Gansu Agricultural University, Lanzhou, 730070, China
| | - Junqian Wang
- College of Veterinary Medicine, Gansu Agricultural University, Lanzhou, 730070, China
| | - Yaying Wang
- College of Veterinary Medicine, Gansu Agricultural University, Lanzhou, 730070, China
| | - Xiaohong Han
- College of Veterinary Medicine, Gansu Agricultural University, Lanzhou, 730070, China
| | - Jinglei Wang
- College of Veterinary Medicine, Gansu Agricultural University, Lanzhou, 730070, China
| | - Tongxiang Zhang
- College of Veterinary Medicine, Gansu Agricultural University, Lanzhou, 730070, China
| | - Tian Zhao
- College of Veterinary Medicine, Gansu Agricultural University, Lanzhou, 730070, China
| | - Honghong He
- College of Veterinary Medicine, Gansu Agricultural University, Lanzhou, 730070, China
| | - Yan Cui
- College of Veterinary Medicine, Gansu Agricultural University, Lanzhou, 730070, China
| | - Sijiu Yu
- College of Veterinary Medicine, Gansu Agricultural University, Lanzhou, 730070, China. .,Gansu Province Livestock Embryo Engineering Research Center, College of Veterinary Medicine, Lanzhou, 730070, China.
| |
Collapse
|
15
|
Walker BN, Nix J, Wilson C, Marrella MA, Speckhart SL, Wooldridge L, Yen CN, Bodmer JS, Kirkpatrick LT, Moorey SE, Gerrard DE, Ealy AD, Biase FH. Tight gene co-expression in BCB positive cattle oocytes and their surrounding cumulus cells. Reprod Biol Endocrinol 2022; 20:119. [PMID: 35964078 PMCID: PMC9375383 DOI: 10.1186/s12958-022-00994-3] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/16/2022] [Accepted: 08/02/2022] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Cytoplasmic and nuclear maturation of oocytes, as well as interaction with the surrounding cumulus cells, are important features relevant to the acquisition of developmental competence. METHODS Here, we utilized Brilliant cresyl blue (BCB) to distinguish cattle oocytes with low activity of the enzyme Glucose-6-Phosphate Dehydrogenase, and thus separated fully grown (BCB positive) oocytes from those in the growing phase (BCB negative). We then analyzed the developmental potential of these oocytes, mitochondrial DNA (mtDNA) copy number in single oocytes, and investigated the transcriptome of single oocytes and their surrounding cumulus cells of BCB positive versus BCB negative oocytes. RESULTS The BCB positive oocytes were twice as likely to produce a blastocyst in vitro compared to BCB- oocytes (P < 0.01). We determined that BCB negative oocytes have 1.3-fold more mtDNA copies than BCB positive oocytes (P = 0.004). There was no differential transcript abundance of genes expressed in oocytes, however, 172 genes were identified in cumulus cells with differential transcript abundance (FDR < 0.05) based on the BCB staining of their oocyte. Co-expression analysis between oocytes and their surrounding cumulus cells revealed a subset of genes whose co-expression in BCB positive oocytes (n = 75) and their surrounding cumulus cells (n = 108) compose a unique profile of the cumulus-oocyte complex. CONCLUSIONS If oocytes transition from BCB negative to BCB positive, there is a greater likelihood of producing a blastocyst, and a reduction of mtDNA copies, but there is no systematic variation of transcript abundance. Cumulus cells present changes in transcript abundance, which reflects in a dynamic co-expression between the oocyte and cumulus cells.
Collapse
Affiliation(s)
- Bailey N Walker
- School of Animal Sciences, Virginia Polytechnic Institute and State University, 175 W Campus Dr, Blacksburg, VA, 24061, USA
| | - Jada Nix
- School of Animal Sciences, Virginia Polytechnic Institute and State University, 175 W Campus Dr, Blacksburg, VA, 24061, USA
| | - Chace Wilson
- School of Animal Sciences, Virginia Polytechnic Institute and State University, 175 W Campus Dr, Blacksburg, VA, 24061, USA
| | - Mackenzie A Marrella
- School of Animal Sciences, Virginia Polytechnic Institute and State University, 175 W Campus Dr, Blacksburg, VA, 24061, USA
| | - Savannah L Speckhart
- School of Animal Sciences, Virginia Polytechnic Institute and State University, 175 W Campus Dr, Blacksburg, VA, 24061, USA
| | - Lydia Wooldridge
- School of Animal Sciences, Virginia Polytechnic Institute and State University, 175 W Campus Dr, Blacksburg, VA, 24061, USA
| | - Con-Ning Yen
- School of Animal Sciences, Virginia Polytechnic Institute and State University, 175 W Campus Dr, Blacksburg, VA, 24061, USA
| | - Jocelyn S Bodmer
- School of Animal Sciences, Virginia Polytechnic Institute and State University, 175 W Campus Dr, Blacksburg, VA, 24061, USA
| | - Laila T Kirkpatrick
- School of Animal Sciences, Virginia Polytechnic Institute and State University, 175 W Campus Dr, Blacksburg, VA, 24061, USA
| | - Sarah E Moorey
- Department of Animal Science, University of Tennessee, Knoxville, TN, USA
| | - David E Gerrard
- School of Animal Sciences, Virginia Polytechnic Institute and State University, 175 W Campus Dr, Blacksburg, VA, 24061, USA
| | - Alan D Ealy
- School of Animal Sciences, Virginia Polytechnic Institute and State University, 175 W Campus Dr, Blacksburg, VA, 24061, USA
| | - Fernando H Biase
- School of Animal Sciences, Virginia Polytechnic Institute and State University, 175 W Campus Dr, Blacksburg, VA, 24061, USA.
| |
Collapse
|
16
|
The secretion and metabolism of cumulus cells support fertilization in the bovine model. Theriogenology 2022; 193:136-145. [DOI: 10.1016/j.theriogenology.2022.08.025] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2022] [Revised: 08/16/2022] [Accepted: 08/17/2022] [Indexed: 11/18/2022]
|
17
|
Xu X, Shen HR, Yu M, Du MR, Li XL. MicroRNA let-7i inhibits granulosa-luteal cell proliferation and oestradiol biosynthesis by directly targeting IMP2. Reprod Biomed Online 2022; 44:803-816. [PMID: 35339367 DOI: 10.1016/j.rbmo.2022.01.016] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2021] [Revised: 01/20/2022] [Accepted: 01/25/2022] [Indexed: 11/30/2022]
Abstract
RESEARCH QUESTION Increased granulosa cell division is associated with abnormal folliculogenesis in polycystic ovary syndrome (PCOS). Lethal-7i microRNA (let-7i) may play an important role in the follicular development and granulosa cell growth; therefore is let-7i involved in PCOS pathogenesis? DESIGN The expression of let-7i was measured in granulosa-luteal cells (GLC) from women with or without PCOS. A human granulosa cell line, KGN, was used for the functional study. Mimics and inhibitors of let-7i, lentiviruses expressing insulin-like growth factor 2 mRNA binding protein (IMP2), and small-interfering RNAs were transfected into KGN cells. KGN cell proliferation was determined by 5-ethynyl-2'-deoxyuridine (EdU) and Cell Counting Kit-8 (CCK-8) assays. The cell cycle and apoptosis were assessed by propidium iodide-annexin V (PI-A) staining and fluorescence-activated cell sorting. Oestradiol concentration was determined by enzyme-linked immunoassay. Bioinformatics analysis and luciferase reporter assay were applied to confirm the let-7i target genes. RESULTS The study showed that let-7i was down-regulated in PCOS GLC (P = 0.001). Mimics of let-7i inhibited KGN proliferation (P = 0.001), and decreased aromatase expression (P = 0.030) and oestradiol production (P = 0.029), whereas let-7i inhibitors had the opposite effect. Bioinformatics analysis and quantitative real-time (qRT) PCR identified IMP2 as a target of let-7i (P = 0.021). qRT-PCR and western blot analysis indicated that IMP2 was up-regulated in GLC in women with PCOS (P = 0.001 and P = 0.044), and IMP2 expression was suppressed by let-7i in KGN cells (P < 0.001). Luciferase reporter assay results (P = 0.002), combined with the rescue assay, confirmed that let-7i inhibited KGN cell proliferation and reduced oestradiol concentration by directly targeting IMP2. CONCLUSIONS let-7i was down-regulated in PCOS GLC. Overexpression of let-7i inhibited KGN cell proliferation and decreased oestradiol production in an IMP2-dependent manner, providing a new molecular mechanism for PCOS.
Collapse
Affiliation(s)
- Xiao Xu
- Obstetrics and Gynecology Hospital, Fudan University Shanghai, People's Republic of China; Shanghai Key Laboratory of Female Reproductive Endocrine Related Diseases, Obstetrics and Gynecology Hospital, Fudan University Shanghai, People's Republic of China
| | - Hao-Ran Shen
- Obstetrics and Gynecology Hospital, Fudan University Shanghai, People's Republic of China; Shanghai Key Laboratory of Female Reproductive Endocrine Related Diseases, Obstetrics and Gynecology Hospital, Fudan University Shanghai, People's Republic of China
| | - Min Yu
- Obstetrics and Gynecology Hospital, Fudan University Shanghai, People's Republic of China; Shanghai Key Laboratory of Female Reproductive Endocrine Related Diseases, Obstetrics and Gynecology Hospital, Fudan University Shanghai, People's Republic of China
| | - Mei-Rong Du
- Obstetrics and Gynecology Hospital, Fudan University Shanghai, People's Republic of China; Shanghai Key Laboratory of Female Reproductive Endocrine Related Diseases, Obstetrics and Gynecology Hospital, Fudan University Shanghai, People's Republic of China.
| | - Xue-Lian Li
- Obstetrics and Gynecology Hospital, Fudan University Shanghai, People's Republic of China; Shanghai Key Laboratory of Female Reproductive Endocrine Related Diseases, Obstetrics and Gynecology Hospital, Fudan University Shanghai, People's Republic of China.
| |
Collapse
|
18
|
PTEN expression in human cumulus cells is associated with embryo development competence. ZYGOTE 2022; 30:611-618. [DOI: 10.1017/s096719942200003x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
Summary
Embryo quality determines the success of in vitro fertilization and embryo transfer (IVF-ET) treatment. Biomarkers for the evaluation of embryo quality have some limitations. Apoptosis in cumulus cells (CCs) is important for ovarian function. PTEN (phosphatase and tensin homolog) is a well known tumour suppressor gene that functions as a mediator of apoptosis and is crucial for mammalian reproduction. In the present study, we analyzed the expression level of PTEN in human CCs and aimed to investigate its association with embryo developmental competence in IVF treatment cycles. The PTEN mRNA level in CCs was measured using real-time fluorescence quantitative PCR. The association of the differential expression of PTEN with embryo quality was analyzed. Our data showed that PTEN mRNA levels were significantly decreased in CCs surrounding mature oocytes compared with immature oocytes. Similar changes were found in the analysis of fertilization and blastocyst formation. The speculation that the measurement of PTEN mRNA levels in human CCs would provide a useful tool for selecting oocytes with greater chances to implant into the uterus needs to be further verified through single-embryo transfer in the future. The proapoptotic mechanism of PTEN in human reproduction needs to be further studied.
Collapse
|
19
|
Xu J, Zelinski MB. Oocyte quality following in vitro follicle development†. Biol Reprod 2021; 106:291-315. [PMID: 34962509 PMCID: PMC9004734 DOI: 10.1093/biolre/ioab242] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2021] [Revised: 12/15/2021] [Accepted: 12/24/2021] [Indexed: 12/30/2022] Open
Abstract
In vitro follicle development (IVFD) is an adequate model to obtain basic knowledge of folliculogenesis and provides a tool for ovarian toxicity screening. IVFD yielding competent oocytes may also offer an option for fertility and species preservation. To promote follicle growth and oocyte maturation in vitro, various culture systems are utilized for IVFD in rodents, domestic animals, wild animals, nonhuman primates, and humans. Follicle culture conditions have been improved by optimizing gonadotropin levels, regulatory factors, nutrient supplements, oxygen concentration, and culture matrices. This review summarizes quality assessment of oocytes generated from in vitro-developed antral follicles from the preantral stage, including oocyte epigenetic and genetic profile, cytoplasmic and nuclear maturation, preimplantation embryonic development following in vitro fertilization, as well as pregnancy and live offspring after embryo transfer. The limitations of oocyte quality evaluation following IVFD and the gaps in our knowledge of IVFD to support proper oocyte development are also discussed. The information may advance our understanding of the requirements for IVFD, with a goal of producing competent oocytes with genetic integrity to sustain embryonic development resulting in healthy offspring.
Collapse
Affiliation(s)
- Jing Xu
- Correspondence: Division of Reproductive & Developmental Sciences, Oregon National Primate Research Center, Oregon Health & Science University, 505 NW 185th Avenue, Beaverton, OR 97006, USA. Tel: +1 5033465411; Fax: +1 5033465585; E-mail:
| | - Mary B Zelinski
- Division of Reproductive & Developmental Sciences, Oregon National Primate Research Center, Oregon Health & Science University, Beaverton, OR, USA,Department of Obstetrics and Gynecology, School of Medicine, Oregon Health & Science University, Portland, OR, USA
| |
Collapse
|
20
|
Abstract
Studying individual mammalian oocytes has been extremely valuable for the understanding of the molecular composition of oocytes including RNA storage. Here, a detailed protocol for isolation of oocytes, extraction of total RNA from single oocytes followed by full-length cDNA amplification, and library preparation is presented. The procedure permits the production of cost-effective and high-quality sequencing libraries. This protocol can be adapted for transcriptome analysis of oocytes from other species and be used to generate high-quality data from single embryos. For complete details on the use and execution of this protocol, please refer to Biase and Kimble (2018). Isolation of high-quality total RNA from single bovine oocytes Detailed procedures for amplification of complementary DNA for library preparation A bioinformatic pipeline for the quantitation of transcript abundance The protocol also enables high-quality data production from single embryos
Collapse
Affiliation(s)
- Fernando H Biase
- Department of Animal and Poultry Sciences, Virginia Polytechnic Institute and State University, Blacksburg, VA 24061, USA
| |
Collapse
|
21
|
Li S, Wang J, Zhang H, Ma D, Zhao M, Li N, Men Y, Zhang Y, Chu H, Lei C, Shen W, Othman OEM, Zhao Y, Min L. Transcriptome profile of goat folliculogenesis reveals the interaction of oocyte and granulosa cell in correlation with different fertility population. Sci Rep 2021; 11:15698. [PMID: 34344973 PMCID: PMC8333342 DOI: 10.1038/s41598-021-95215-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2021] [Accepted: 07/15/2021] [Indexed: 11/28/2022] Open
Abstract
To understand the molecular and genetic mechanisms related to the litter size in one species of two different populations (high litter size and low litter size), we performed RNA-seq for the oocytes and granulosa cells (GCs) at different developmental stages of follicle, and identified the interaction of genes from both sides of follicle (oocyte and GCs) and the ligand-receptor pairs from these two sides. Our data were very comprehensive to uncover the difference between these two populations regarding the folliculogenesis. First, we identified a set of potential genes in oocyte and GCs as the marker genes which can be used to determine the goat fertility capability and ovarian reserve ability. The data showed that GRHPR, GPR84, CYB5A and ERAL1 were highly expressed in oocyte while JUNB, SCN2A, MEGE8, ZEB2, EGR1and PRRC2A were highly expressed in GCs. We found more functional genes were expressed in oocytes and GCs in high fertility group (HL) than that in low fertility group (LL). We uncovered that ligand-receptor pairs in Notch signaling pathway and transforming growth factor-β (TGF-β) superfamily pathways played important roles in goat folliculogenesis for the different fertility population. Moreover, we discovered that the correlations of the gene expression in oocytes and GCs at different stages in the two populations HL and LL were different, too. All the data reflected the gene expression landscape in oocytes and GCs which was correlated well with the fertility capability.
Collapse
Affiliation(s)
- Shen Li
- College of Animal Sciences and Technology, Qingdao Agricultural University, Qingdao, 266109, People's Republic of China
| | - Junjie Wang
- College of Life Sciences, Qingdao Agricultural University, Qingdao, 266109, People's Republic of China
| | - Hongfu Zhang
- State Key Laboratory of Animal Nutrition, Institute of Animal Sciences, Chinese Academy of Agricultural Sciences, Beijing, 100193, People's Republic of China
| | - Dongxue Ma
- College of Animal Sciences and Technology, Qingdao Agricultural University, Qingdao, 266109, People's Republic of China
| | - Minghui Zhao
- College of Life Sciences, Qingdao Agricultural University, Qingdao, 266109, People's Republic of China
| | - Na Li
- College of Life Sciences, Qingdao Agricultural University, Qingdao, 266109, People's Republic of China
| | - Yuhao Men
- College of Animal Sciences and Technology, Qingdao Agricultural University, Qingdao, 266109, People's Republic of China
| | - Yuan Zhang
- Jining Animal Husbandry Development Center, Jining, People's Republic of China
| | - Huimin Chu
- Jining Agricultural Science Institute, Jining, People's Republic of China
| | - Chuzhao Lei
- Key Laboratory of Animal Genetics, Breeding and Reproduction of Shaanxi Province, College of Animal Science and Technology, Northwest A&F University, Yangling, 712100, People's Republic of China
| | - Wei Shen
- College of Life Sciences, Qingdao Agricultural University, Qingdao, 266109, People's Republic of China
| | | | - Yong Zhao
- College of Life Sciences, Qingdao Agricultural University, Qingdao, 266109, People's Republic of China. .,State Key Laboratory of Animal Nutrition, Institute of Animal Sciences, Chinese Academy of Agricultural Sciences, Beijing, 100193, People's Republic of China.
| | - Lingjiang Min
- College of Animal Sciences and Technology, Qingdao Agricultural University, Qingdao, 266109, People's Republic of China.
| |
Collapse
|
22
|
Gerli S, Della Morte C, Ceccobelli M, Mariani M, Favilli A, Leonardi L, Lanti A, Iannitti RG, Fioretti B. Biological and clinical effects of a resveratrol-based multivitamin supplement on intracytoplasmic sperm injection cycles: a single-center, randomized controlled trial. J Matern Fetal Neonatal Med 2021; 35:7640-7648. [PMID: 34338114 DOI: 10.1080/14767058.2021.1958313] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
BACKGROUND Resveratrol display's positive effects on follicle growth and development in preclinical studies while there is scantly information from clinical trials. The aim of this study was to evaluate the biological and clinical impact of a resveratrol-based multivitamin supplement on intracytoplasmatic sperm injection (ICSI) cycles. METHODS A randomized, single-center controlled trial conducted at the University Center of Assisted Reproductive Technologies involving 101 women infertile women undergoing ICSI cycles was conducted. A pretreatment with a daily resveratrol based nutraceutical was administered to the Study Group; Control Group received folic acid. The primary outcomes were the number of developed mature follicles (>16 mm), total oocytes and MII oocytes recovered, the fertilization rate and the number of cleavage embryos/blastocysts obtained. Secondary endpoints were the duration and dosage of gonadotropins, the number of embryos for transfer, implantation, biochemical, clinical pregnancy rates, live birth and miscarriage rates. RESULTS A significantly higher number of oocytes and MII oocytes were retrieved in the Study Group than in Control Group (p = .03 and p = .04, respectively). A higher fertilization rate (p = .004), more cleavage embryos/patient (p = .01), blastocytes/patients (p = .01) and cryopreserved embryos (p = .03) were obtained in the Study Group. No significant differences in biochemical or clinical pregnancy, live birth, and miscarriage rates were revealed, but a trend to a higher live birth rate was revealed in the Study Group. CONCLUSIONS A 3 months period of dietary supplementation with a resveratrol-based multivitamin nutraceutical leads to better biological effects on ICSI cycles. TRIAL REGISTRATION NUMBER ClinicalTrials.gov registration identifier: NCT04386499.
Collapse
Affiliation(s)
- Sandro Gerli
- Department of Medicine and Surgery, Centre of Perinatal and Reproductive Medicine, University of Perugia, Perugia, Italy.,Centre of Assisted Reproductive Technologies, S. Maria della Misericordia Hospital, Perugia, Italy
| | - Chiara Della Morte
- Department of Medicine and Surgery, Centre of Perinatal and Reproductive Medicine, University of Perugia, Perugia, Italy.,Centre of Assisted Reproductive Technologies, S. Maria della Misericordia Hospital, Perugia, Italy
| | - Margherita Ceccobelli
- Department of Medicine and Surgery, Centre of Perinatal and Reproductive Medicine, University of Perugia, Perugia, Italy.,Centre of Assisted Reproductive Technologies, S. Maria della Misericordia Hospital, Perugia, Italy
| | - Monica Mariani
- Centre of Assisted Reproductive Technologies, S. Maria della Misericordia Hospital, Perugia, Italy
| | | | - Lucio Leonardi
- Department of R&D, S&R Farmaceutici S.p.A Bastia Umbra, Perugia, Italy
| | - Alessandro Lanti
- Department of R&D, S&R Farmaceutici S.p.A Bastia Umbra, Perugia, Italy
| | | | - Bernard Fioretti
- Centre of Assisted Reproductive Technologies, S. Maria della Misericordia Hospital, Perugia, Italy.,Department of Chemistry, Biology and Biotechnologies, University of Perugia, Perugia, Italy
| |
Collapse
|
23
|
Moorey SE, Monnig JM, Smith MF, Ortega MS, Green JA, Pohler KG, Bridges GA, Behura SK, Geary TW. Differential Transcript Profiles in Cumulus-Oocyte Complexes Originating from Pre-Ovulatory Follicles of Varied Physiological Maturity in Beef Cows. Genes (Basel) 2021; 12:genes12060893. [PMID: 34200628 PMCID: PMC8227736 DOI: 10.3390/genes12060893] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2021] [Revised: 05/27/2021] [Accepted: 05/27/2021] [Indexed: 12/13/2022] Open
Abstract
Small dominant follicle diameter at induced ovulation, but not at spontaneous ovulation, decreased pregnancy rate, fertilization rate, and day seven embryo quality in beef cows. We hypothesized that the physiological status of the follicle at GnRH-induced ovulation has a direct effect on the transcriptome of the Cumulus-Oocyte complex, thereby affecting oocyte competence and subsequent embryo development. The objective of this study was to determine if the transcriptome of oocytes and associated cumulus cells (CC) differed among small (≤11.7 mm) and large follicles (≥12.7 mm) exposed to a GnRH-induced gonadotropin surge and follicles (11.7–14.0 mm) exposed to an endogenous gonadotropin surge (spontaneous follicles). RNA sequencing data, from pools of four oocytes or their corresponding CC, revealed 69, 94, and 83 differentially expressed gene transcripts (DEG) among oocyte pools from small versus large, small versus spontaneous, and large versus spontaneous follicle classifications, respectively. An additional 128, 98, and 80 DEG were identified among small versus large, small versus spontaneous, and large versus spontaneous follicle CC pools, respectively. The biological pathway “oxidative phosphorylation” was significantly enriched with DEG from small versus spontaneous follicle oocyte pools (FDR < 0.01); whereas the glycolytic pathway was significantly enriched with DEG from CC pools obtained from large versus small follicles (FDR < 0.01). These findings collectively suggest that altered carbohydrate metabolism within the Cumulus-Oocyte complex likely contributes to the decreased competency of oocytes from small pre-ovulatory follicles exposed to an exogenous GnRH-induced gonadotropin surge.
Collapse
Affiliation(s)
- Sarah E. Moorey
- Department of Animal Science, University of Tennessee, Knoxville, TN 37996, USA
- Correspondence:
| | - Jenna M. Monnig
- Division of Animal Sciences, University of Missouri, Columbia, MO 65211, USA; (J.M.M.); (M.F.S.); (M.S.O.); (J.A.G.); (S.K.B.)
| | - Michael F. Smith
- Division of Animal Sciences, University of Missouri, Columbia, MO 65211, USA; (J.M.M.); (M.F.S.); (M.S.O.); (J.A.G.); (S.K.B.)
| | - M. Sofia Ortega
- Division of Animal Sciences, University of Missouri, Columbia, MO 65211, USA; (J.M.M.); (M.F.S.); (M.S.O.); (J.A.G.); (S.K.B.)
| | - Jonathan A. Green
- Division of Animal Sciences, University of Missouri, Columbia, MO 65211, USA; (J.M.M.); (M.F.S.); (M.S.O.); (J.A.G.); (S.K.B.)
| | - Ky G. Pohler
- Department of Animal Science, Texas A&M University, College Station, TX 77843, USA;
| | - G. Alan Bridges
- Department of Animal Science, University of Minnesota, St. Paul, MN 55108, USA;
| | - Susanta K. Behura
- Division of Animal Sciences, University of Missouri, Columbia, MO 65211, USA; (J.M.M.); (M.F.S.); (M.S.O.); (J.A.G.); (S.K.B.)
| | - Thomas W. Geary
- USDA-ARS Fort Keogh Livestock and Range Research Lab, Miles City, MT 59301, USA;
| |
Collapse
|
24
|
Dell'Aversana C, Cuomo F, Longobardi S, D'Hooghe T, Caprio F, Franci G, Santonastaso M, Colacurci N, Barone S, Pisaturo V, Valerio D, Altucci L. Age-related miRNome landscape of cumulus oophorus cells during controlled ovarian stimulation protocols in IVF cycles. Hum Reprod 2021; 36:1310-1325. [PMID: 33454781 PMCID: PMC8058597 DOI: 10.1093/humrep/deaa364] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2020] [Revised: 12/06/2020] [Indexed: 12/26/2022] Open
Abstract
STUDY QUESTION Is the microRNA (miRNA) expression pattern of cumulus oophorus cells (COCs) in women undergoing medically assisted reproduction (MAR) procedures differentially modulated according to patient age and gonadotropin treatment strategy? SUMMARY ANSWER Maternal age is an independent factor impacting miRNA expression in COCs while gonadotropin treatment may affect follicular miRNA expression and IVF efficacy. WHAT IS KNOWN ALREADY Epigenetic mechanisms in female infertility are complex and poorly studied. DNA methylation, histone modifications, miRNAs and nucleosome positioning influence cellular machinery through positive and negative feedback mechanisms either alone or interactively. miRNAs are important regulators during oogenesis, spermatogenesis and early embryogenesis, and are reported to play a role in regulating crosstalk between the oocyte and COCs. Although miRNome analysis has been performed in female human reproductive tissues (endometrium, myometrium, cervix and ovaries), epigenetic modifications in women with infertility have not been explored in detail. In addition, the impact of gonadotropin treatments during MAR on miRNA expression in COCs has not been fully investigated. STUDY DESIGN, SIZE, DURATION This study was carried out in 53 COC samples obtained from mature metaphase II (MII) oocytes in 53 women undergoing MAR treatment. A total of 38 samples for assay development were pooled by maternal age and gonadotropin treatment into four predetermined subgroups: ≥36 years and recombinant human FSH (r-hFSH), n = 10; ≥36 years and r-hFSH+ recombinant human-luteinizing hormone (r-hLH), n = 10; ≤35 years and r-hFSH, n = 9; ≤35 years and r-hFSH+r-hLH, n = 9. miRNome profiles were determined and compared between subgroups. Expression of defined miRNAs was validated in the remaining fifteen samples, representative of each subgroup, by quantitative polymerase chain reaction (PCR). PARTICIPANTS/MATERIALS, SETTING, METHODS COCs were processed for miRNA-enriched total RNA extraction and pooled in homogeneous subgroups to obtain a sufficient amount and quality of starting material to perform the analysis. Each pooled sample underwent miRNA profiling using PCR assay system to examine expression of 752 human miRNAs without pre-amplification. Data were analyzed using the delta-delta Ct method for relative quantitation and prediction of target genes (with at least four algorithms predicting the same miRNA-gene interaction pair (HIT)>4). The miRSystem database provided functional annotation enrichment (raw P-value <0.05) of co-expressed miRNAs. MAIN RESULTS AND THE ROLE OF CHANCE We found distinctive miRNA expression profiles in each subgroup correlating with age and MAR stimulation. In addition, a number of selective and co-expressed miRNAs were revealed by comparative analysis. A cluster of 37 miRNAs were commonly but differentially expressed in all four pools. Significant differences were observed in expression regulation of 37 miRNAs between age groups (≤35 or ≥36) in women receiving r-hFSH+r-hLH compared to those receiving r-hFSH alone. Higher concentrations and increased numbers of miRNAs were recorded in younger than in older patients, regardless of treatment. Functional and expression studies performed to retrieve common miRNome profiles revealed an enrichment of biological functions in oocyte growth and maturation, embryo development, steroidogenesis, ovarian hyperstimulation, apoptosis and cell survival, glucagon and lipid metabolism, and cell trafficking. The highest scored pathways of target genes of the 37 common miRNAs were associated with mitogen-activated protein kinase (MAPK) signaling pathways, G alpha signaling, transcription regulation, tight junctions, RNA polymerase I and III, and mitochondrial transcription. We identified a potential age- and MAR stimulation-dependent signature in the miRNA landscape of COCs. LIMITATIONS, REASONS FOR CAUTION We cannot rule out the possibility that other unknown individual genetic or clinical factors may have interfered with the reported results. Since miRNA profiling was conducted with a predefined array of target probes, other miRNA molecules, potentially modulated by age and hormonal stimulation, may have been missed in this study. WIDER IMPLICATIONS OF THE FINDINGS miRNA expression in COCs is modulated by gonadotropin treatment and correlates strongly with age. A better understanding of the expression patterns and functions of miRNAs may lead to the development of novel therapeutics to treat ovarian dysfunction and improve fertility in older women. STUDY FUNDING/COMPETING INTEREST This study was funded by Merck KGaA, Darmstadt, Germany. All authors declared no competing interest, except SL and TD who are fully employed by Merck KGaA. TRIAL REGISTRATION NUMBER N/A
Collapse
Affiliation(s)
- C Dell'Aversana
- Department of Precision Medicine, University of Campania 'Luigi Vanvitelli', Naples 80138, Italy.,Institute of Experimental Endocrinology and Oncology 'Gaetano Salvatore' (IEOS)-National Research Council (CNR), Naples 80131, Italy
| | - F Cuomo
- EPI-C S.r.l., Naples 80138, Italy
| | | | | | - F Caprio
- Outpatient Fertility Unit, University of Campania 'Luigi Vanvitelli', Naples 80138, Italy
| | - G Franci
- Department of Precision Medicine, University of Campania 'Luigi Vanvitelli', Naples 80138, Italy.,Department of Medicine, Surgery and Dentistry "ScuolaMedicaSalernitana", University of Salerno, Baronissi, SA 84081, Italy
| | - M Santonastaso
- Department of Woman, Child and General and Special Surgery, University of Campania 'Luigi Vanvitelli', Naples 80138, Italy
| | - N Colacurci
- Outpatient Fertility Unit, University of Campania 'Luigi Vanvitelli', Naples 80138, Italy.,Department of Woman, Child and General and Special Surgery, University of Campania 'Luigi Vanvitelli', Naples 80138, Italy
| | - S Barone
- Department of Assisted Reproduction, Versilia Hospital, Lido di Camaiore, Lucca 55049, Italy
| | - V Pisaturo
- Department of Reproductive Medicine, International Evangelical Hospital, Genoa 16122, Italy
| | - D Valerio
- Merck Serono S.p.A, Rome 00176, Italy.,Institute of Genetic Research (IRG), Naples 80143, Italy
| | - L Altucci
- Department of Precision Medicine, University of Campania 'Luigi Vanvitelli', Naples 80138, Italy
| |
Collapse
|
25
|
Liu W, Guo J, Li C, Liao H, Qin Y, Huang G. Mitochondrial DNA copy number of cumulus cells is not linked to embryo implantation in good prognosis IVF patients. Reprod Biomed Online 2021; 42:901-908. [PMID: 33771465 DOI: 10.1016/j.rbmo.2021.01.002] [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: 02/19/2020] [Revised: 11/22/2020] [Accepted: 01/10/2021] [Indexed: 10/22/2022]
Abstract
RESEARCH QUESTION Could the mitochondrial DNA (mtDNA) copy number of cumulus cells be used as a biomarker of the potential of embryo implantation in good prognosis IVF patients? DESIGN A prospective cohort study on good prognosis IVF patients from a large reproductive medicine centre. A total of 392 embryos from 61 cycles (including 31 implanted and 30 non-implanted cycles) were enrolled in the study. The corresponding cumulus cell mtDNA copy number of embryos was tested by real-time quantitative polymerase chain reaction. The corresponding cumulus cell mtDNA copy numbers were compared between implanted and non-implanted embryos and also compared between high quality and poor quality embryos. Then, a mitochondrial function assay including mitochondrial membrane potentials, concentration of reactive oxygen species (ROS) and ATP content of the corresponding cumulus cells were compared between high quality and poor quality embryos to verify the above experimental findings. RESULTS For the same population, the mean cumulus cell mtDNA copy numbers for implanted and non-implanted embryos were 255.61 ± 81.02 and 254.50 ± 73.29 (P = 0.47), and those for high quality and poor quality embryos were 266.02 ± 98.56 and 295.71 ± 70.64 (P = 0.99), respectively. There was no significant difference in cumulus cell mtDNA copy number between implanted and non-implanted embryos or between high quality and poor quality embryos. The mitochondrial membrane potential, ROS levels and ATP content of the corresponding cumulus cells did not differ significantly between high quality and poor quality groups. CONCLUSIONS Measurement of cumulus cell mtDNA copy number might not provide any advantage to embryo prioritization in good prognosis IVF patients. Any suggested link between cumulus cell mtDNA copy number and embryo implantation requires further validation.
Collapse
Affiliation(s)
- Weiwei Liu
- Chongqing Reproductive Medical Center, Chongqing Maternity Hospital, Jintang Street No. 64, Yuzhong District, Chongqing 400013, China.
| | - Jing Guo
- Chongqing Key Laboratory of Human Embryo Engineering, Chongqing Maternity Hospital, Jintang Street No. 64, Yuzhong District, Chongqing 400013, China
| | - Chong Li
- Chongqing Key Laboratory of Human Embryo Engineering, Chongqing Maternity Hospital, Jintang Street No. 64, Yuzhong District, Chongqing 400013, China
| | - Haiyuan Liao
- Chongqing Reproductive Medical Center, Chongqing Maternity Hospital, Jintang Street No. 64, Yuzhong District, Chongqing 400013, China
| | - Yinhua Qin
- Chongqing Key Laboratory of Human Embryo Engineering, Chongqing Maternity Hospital, Jintang Street No. 64, Yuzhong District, Chongqing 400013, China
| | - Guoning Huang
- Chongqing Reproductive Medical Center, Chongqing Maternity Hospital, Jintang Street No. 64, Yuzhong District, Chongqing 400013, China; Chongqing Key Laboratory of Human Embryo Engineering, Chongqing Maternity Hospital, Jintang Street No. 64, Yuzhong District, Chongqing 400013, China.
| |
Collapse
|
26
|
Jia Z, Wang X. Effects of C-type natriuretic peptide on meiotic arrest and developmental competence of bovine oocyte derived from small and medium follicles. Sci Rep 2020; 10:18213. [PMID: 33106527 PMCID: PMC7589481 DOI: 10.1038/s41598-020-75354-5] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2020] [Accepted: 10/07/2020] [Indexed: 01/29/2023] Open
Abstract
The present study aimed to evaluate the effects of C-type natriuretic peptide (CNP) on meiotic arrest and developmental competence of bovine oocyte derived from follicles of different sizes. Collected immature cumulus-oocyte complexes from small follicles (< 3 mm) and medium follicles (3–8 mm) were cultured for 6 h in basal medium supplementated without or with 200 nM CNP. We observed that CNP effectively sustained meiotic arrest at germinal vesicle stage in in vitro cultured bovine oocytes from follicles of different sizes. Moreover, CNP treatment significantly improved the levels of cGMP in both cumulus cells and oocytes, as well as the levels of cAMP in oocytes regardless of follicle size. Based on the above results, we tested the effect of a novel in vitro maturation (IVM) system based on CNP-pretreatment, including a pre-IVM phase for 6 h using 200 nM CNP, followed by a extended IVM phase for 28 h, on developmental competence of bovine oocyte derived from small follicles (< 3 mm) and medium follicles (3–8 mm) compared to standard IVM system. The results showed that athough the novel IVM system based on CNP-pretreatment enhanced the developmental potencial of oocytes obtained from large follicles, but had no effect on the developmental comptence of oocytes obtained from small follicles.
Collapse
Affiliation(s)
- Zhenwei Jia
- College of Animal Science and Technology, Inner Mongolia University for the Nationalities, 536 West Huolinhe Street, Tongliao, 028000, Inner Mongolia, People's Republic of China.
| | - Xueli Wang
- College of Animal Science and Technology, Inner Mongolia University for the Nationalities, 536 West Huolinhe Street, Tongliao, 028000, Inner Mongolia, People's Republic of China
| |
Collapse
|
27
|
Wu R, Li J, Li J, Yan X, Zhou W, Ling C, Ye Y, Chen Q, Li Y. Circular RNA expression profiling and bioinformatic analysis of cumulus cells in endometriosis infertility patients. Epigenomics 2020; 12:2093-2108. [PMID: 33090019 DOI: 10.2217/epi-2020-0291] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023] Open
Abstract
Aim: To explore the circular RNA (circRNA) profile in cumulus cells from endometriosis-associated infertility patients. Methods: The expression of circRNAs was profiled by high-throughput sequencing. Sanger sequencing was performed to identify the backsplicing site. Six candidate circRNAs and their parental genes were measured in 30 samples by quantitative reverse transcription-polymerase chainreaction (qRT-PCR). Bioinformatics analysis was performed to predict the functions. Results: A total of 55 upregulated and 41 downregulated differentially expressed circRNAs were detected. Kyoto Encyclopedia of Genes and Genomes data indicated that these target genes were mainly involved in cumulus cell growth- and differentiation-related pathways. Hsa_circ_0072391, hsa_circ_0007299 and hsa_circ_0057799 were significantly increased, and hsa_circ_001533 was significantly decreased in endometriosis-associated infertility patients. Conclusion: The differentially expressed circRNAs might be potentially involved in pathophysiology of endometriosis-associated infertility.
Collapse
Affiliation(s)
- Rongfeng Wu
- Reproductive Medical Center, The First Affiliated Hospital, School of Medicine, Xiamen University, Fujian 361003, PR China
| | - Jingjing Li
- State Key Laboratory of Cellular Stress Biology & Key Laboratory of the Ministry of Education for Coastal & Wetland Ecosystems, School of Life Sciences, Xiamen University, Fujian 361102, PR China
| | - Junzui Li
- The Key Laboratory of Research & Diagnosis of Gynecological Diseases of Xiamen & Department of Obstetrics & Gynecology, The First Affiliated Hospital, School of Medicine, Xiamen University, Fujian, 361003, PR China
| | - Xiaohong Yan
- Reproductive Medical Center, The First Affiliated Hospital, School of Medicine, Xiamen University, Fujian 361003, PR China
| | - Weidong Zhou
- Reproductive Medical Center, The First Affiliated Hospital, School of Medicine, Xiamen University, Fujian 361003, PR China
| | - Chen Ling
- Reproductive Medical Center, The First Affiliated Hospital, School of Medicine, Xiamen University, Fujian 361003, PR China
| | - Yuanyuan Ye
- Reproductive Medical Center, The First Affiliated Hospital, School of Medicine, Xiamen University, Fujian 361003, PR China
| | - Qionghua Chen
- The Key Laboratory of Research & Diagnosis of Gynecological Diseases of Xiamen & Department of Obstetrics & Gynecology, The First Affiliated Hospital, School of Medicine, Xiamen University, Fujian, 361003, PR China
| | - Youzhu Li
- Reproductive Medical Center, The First Affiliated Hospital, School of Medicine, Xiamen University, Fujian 361003, PR China
| |
Collapse
|
28
|
Moorey SE, Walker BN, Elmore MF, Elmore JB, Rodning SP, Biase FH. Rewiring of gene expression in circulating white blood cells is associated with pregnancy outcome in heifers (Bos taurus). Sci Rep 2020; 10:16786. [PMID: 33033295 PMCID: PMC7544915 DOI: 10.1038/s41598-020-73694-w] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2020] [Accepted: 09/18/2020] [Indexed: 12/23/2022] Open
Abstract
Infertility is a challenging phenomenon in cattle that reduces the sustainability of beef production worldwide. Here, we tested the hypothesis that gene expression profiles of protein-coding genes expressed in peripheral white blood cells (PWBCs), and circulating micro RNAs in plasma, are associated with female fertility, measured by pregnancy outcome. We drew blood samples from 17 heifers on the day of artificial insemination and analyzed transcript abundance for 10,496 genes in PWBCs and 290 circulating micro RNAs. The females were later classified as pregnant to artificial insemination, pregnant to natural breeding or not pregnant. We identified 1860 genes producing significant differential coexpression (eFDR < 0.002) based on pregnancy outcome. Additionally, 237 micro RNAs and 2274 genes in PWBCs presented differential coexpression based on pregnancy outcome. Furthermore, using a machine learning prediction algorithm we detected a subset of genes whose abundance could be used for blind categorization of pregnancy outcome. Our results provide strong evidence that transcript abundance in circulating white blood cells is associated with fertility in heifers.
Collapse
Affiliation(s)
- Sarah E Moorey
- Department of Animal Science, University of Tennessee, 2506 River Drive, Knoxville, TN, 37996, USA
| | - Bailey N Walker
- Department of Animal and Poultry Sciences, Virginia Polytechnic Institute and State University, 175 West Campus Drive, Blacksburg, VA, 24061, USA
| | - Michelle F Elmore
- Department of Animal Sciences, Auburn University, 107 Comer Hall, Auburn, AL, 36849, USA
- Alabama Cooperative Extension System, 107 Comer Hall, Auburn, AL, 36849, USA
| | - Joshua B Elmore
- Alabama Cooperative Extension System, 107 Comer Hall, Auburn, AL, 36849, USA
| | - Soren P Rodning
- Department of Animal Sciences, Auburn University, 107 Comer Hall, Auburn, AL, 36849, USA
| | - Fernando H Biase
- Department of Animal and Poultry Sciences, Virginia Polytechnic Institute and State University, 175 West Campus Drive, Blacksburg, VA, 24061, USA.
| |
Collapse
|
29
|
Gegenfurtner K, Flenkenthaler F, Fröhlich T, Wolf E, Arnold GJ. The impact of transcription inhibition during in vitro maturation on the proteome of bovine oocytes†. Biol Reprod 2020; 103:1000-1011. [PMID: 32856698 DOI: 10.1093/biolre/ioaa149] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2020] [Revised: 07/21/2020] [Accepted: 08/27/2020] [Indexed: 12/23/2022] Open
Abstract
Proper oocyte maturation is a prerequisite for successful reproduction and requires the resumption of meiosis to the metaphase II stage (MII). In bovine oocytes, nuclear maturation has been shown to occur in in vitro maturing cumulus-enclosed oocytes (COCs) in the absence of transcription, but their developmental capacity is reduced compared to transcriptionally competent COCs. To assess the impact of transcription during in vitro maturation of bovine COCs on the quantitative oocyte proteome, a holistic nano-LC-MS/MS analysis of germinal vesicle oocytes and MII oocytes matured with or without addition of the transcription inhibitor actinomycin D (ActD) was carried out. Analyzing eight biological replicates for each of the three groups, a total of 2018 proteins was identified. These could be clearly classified into proteins depending or not depending on transcription during oocyte maturation. Proteins whose abundance increased after maturation irrespective of transcription inhibition - and hence independent of transcription - were related to the cell cycle, reflecting the progression of meiosis, and to cellular component organization, which is crucial for cytoplasmic maturation. In contrast, transcription-dependent proteins were associated with cell-cell adhesion and translation. Since a high rate of protein synthesis in oocytes has been shown to correlate with their developmental competence, oocyte maturation in transcriptionally impaired COCs is apparently disturbed. Our experiments reveal that impaired transcription during in vitro maturation of COCs has a substantial effect on specific components of the oocyte proteome, and that transcription is required for specific classes of oocyte proteins predominantly involved in translation.
Collapse
Affiliation(s)
- Katrin Gegenfurtner
- Laboratory for Functional Genome Analysis (LAFUGA), Gene Center, LMU Munich, Germany
| | - Florian Flenkenthaler
- Laboratory for Functional Genome Analysis (LAFUGA), Gene Center, LMU Munich, Germany
| | - Thomas Fröhlich
- Laboratory for Functional Genome Analysis (LAFUGA), Gene Center, LMU Munich, Germany
| | - Eckhard Wolf
- Laboratory for Functional Genome Analysis (LAFUGA), Gene Center, LMU Munich, Germany.,Department of Veterinary Sciences, Chair for Molecular Animal Breeding and Biotechnology, Gene Center, LMU Munich, Germany.,Center for Innovative Medical Models (CiMM), LMU Munich, Germany
| | - Georg J Arnold
- Laboratory for Functional Genome Analysis (LAFUGA), Gene Center, LMU Munich, Germany
| |
Collapse
|
30
|
Human Cumulus Cells in Long-Term In Vitro Culture Reflect Differential Expression Profile of Genes Responsible for Planned Cell Death and Aging-A Study of New Molecular Markers. Cells 2020; 9:cells9051265. [PMID: 32455542 PMCID: PMC7291080 DOI: 10.3390/cells9051265] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2020] [Revised: 05/16/2020] [Accepted: 05/19/2020] [Indexed: 12/19/2022] Open
Abstract
In the ovarian follicle, maturation of the oocyte increases in the presence of somatic cells called cumulus cells (CCs). These cells form a direct barrier between the oocyte and external environment. Thanks to bidirectional communication, they have a direct impact on the oocyte, its quality and development potential. Understanding the genetic profile of CCs appears to be important in elucidating the physiology of oocytes. Long-term in vitro culture of CCs collected from patients undergoing controlled ovarian stimulation during in vitro fertilization procedure was conducted. Using microarray expression analysis, transcript levels were assessed on day 1, 7, 15, and 30 of culture. Apoptosis and aging of CCs strictly influence oocyte quality and subsequently the outcome of assisted reproductive technologies (ART). Thus, particular attention was paid to the analysis of genes involved in programmed cell death, aging, and apoptosis. Due to the detailed level of expression analysis of each of the 133 analyzed genes, three groups were selected: first with significantly decreased expression during the culture; second with the statistically lowest increase in expression; and third with the highest significant increase in expression. COL3A1, SFRP4, CTGF, HTR2B, VCAM1, TNFRSF11B genes, belonging to the third group, were identified as potential carriers of information on oocyte quality.
Collapse
|
31
|
TMT-based quantitative proteomic analysis of cumulus cells derived from vitrified porcine immature oocytes following in vitro maturation. Theriogenology 2020; 152:8-17. [PMID: 32361306 DOI: 10.1016/j.theriogenology.2020.04.025] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2020] [Revised: 04/16/2020] [Accepted: 04/18/2020] [Indexed: 12/26/2022]
Abstract
As the immature oocytes are submitted to cryopreservation, their surrounding cumulus cells (CCs) will inevitably suffer, which may have some adverse effects on subsequent oocyte maturation and development. So far, little is known about the molecular differences in CCs of immature oocytes after vitrification. The aim of this study therefore was to analyze the protein profile of CCs derived from vitrified porcine immature oocytes following in vitro maturation, using TMT-based quantitative proteomic approach. A total of 5910 proteins were identified, and 88 of them presented significant difference, with 46 up-regulated and 42 down-regulated proteins. Gene Ontology enrichment analysis revealed that cell cycle phase transition, mitotic cell cycle phase transition, positive regulation of cell differentiation and regulation of oogenesis were significantly down-regulated within the biological process. After Kyoto Encyclopedia of Genes and Genomes pathway analysis, some up-regulated proteins were significantly enriched in TGF-beta signaling pathway and 4 pathways related to steroid hormones. Furthermore, 10 selected proteins were quantified and verified by a parallel reaction monitoring technique, indicating a high reliability of the TMT results. In conclusion, vitrification affects protein profile of CCs as well as their biological functions, which will offer a new perspective to understand the reasons for decline in maturation quality of vitrified immature oocytes.
Collapse
|
32
|
Chromosome Missegregation in Single Human Oocytes Is Related to the Age and Gene Expression Profile. Int J Mol Sci 2020; 21:ijms21061934. [PMID: 32178390 PMCID: PMC7139522 DOI: 10.3390/ijms21061934] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2020] [Revised: 03/09/2020] [Accepted: 03/10/2020] [Indexed: 12/16/2022] Open
Abstract
The growing trend for women to postpone childbearing has resulted in a dramatic increase in the incidence of aneuploid pregnancies. Despite the importance to human reproductive health, the events precipitating female age-related meiotic errors are poorly understood. To gain new insight into the molecular basis of age-related chromosome missegregation in human oocytes, we combined the transcriptome profiles of twenty single oocytes (derived from females divided into two groups according to age <35 and ≥35 years) with their chromosome status obtained by array comparative genomic hybridization (aCGH). Furthermore, we compared the transcription profile of the single oocyte with the surrounding cumulus cells (CCs). RNA-seq data showed differences in gene expression between young and old oocytes. Dysregulated genes play a role in important biological processes such as gene transcription regulation, cytoskeleton organization, pathways related to RNA maturation and translation. The comparison of the transcription profile of the oocyte and the corresponding CCs highlighted the differential expression of genes belonging to the G protein-coupled receptor superfamily. Finally, we detected the loss of a X chromosome in two oocytes derived from women belonging to the ≥35 years age group. These aneuploidies may be caused by the detriment of REEP4, an endoplasmic reticulum protein, in women aged ≥35 years. Here we gained new insight into the complex regulatory circuit between the oocyte and the surrounding CCs and uncovered a new putative molecular basis of age-related chromosome missegregation in human oocytes.
Collapse
|
33
|
Oocyte competence is maintained by m 6A methyltransferase KIAA1429-mediated RNA metabolism during mouse follicular development. Cell Death Differ 2020; 27:2468-2483. [PMID: 32094512 DOI: 10.1038/s41418-020-0516-1] [Citation(s) in RCA: 74] [Impact Index Per Article: 18.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2019] [Revised: 02/05/2020] [Accepted: 02/07/2020] [Indexed: 12/19/2022] Open
Abstract
KIAA1429 (also known as vir-like m6A methyltransferase-associated protein (VIRMA)), a newly identified component of the RNA m6A methyltransferase complex, plays critical roles in guiding region-selective m6A deposition. However, in mammals, whether KIAA1429 mediates RNA m6A regulatory pathway functions in vivo remains unknown. Here, we show that the Kiaa1429-specific deficiency in oocytes resulted in female infertility with defective follicular development and fully grown germinal vesicle (GV) oocytes failing to undergo germinal vesicle breakdown (GVBD) and consequently losing the ability to resume meiosis. The oocyte growth is accompanied by the accumulation of abundant RNAs and posttranscriptional regulation. We found that the loss of Kiaa1429 could also lead to abnormal RNA metabolism in GV oocytes. RNA-seq profiling revealed that Kiaa1429 deletion altered the expression pattern of the oocyte-derived factors essential for follicular development. In addition, our data show that the conditional depletion of Kiaa1429 decreased the m6A levels in oocytes and mainly affected the alternative splicing of genes associated with oogenesis. In summary, the m6A methyltransferase KIAA1429-mediated RNA metabolism plays critical roles in folliculogenesis and the maintenance of oocyte competence.
Collapse
|
34
|
The blueprint of RNA storages relative to oocyte developmental competence in cattle (Bos taurus). Biol Reprod 2020; 102:784-794. [DOI: 10.1093/biolre/ioaa015] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2019] [Revised: 12/04/2019] [Accepted: 01/22/2020] [Indexed: 12/22/2022] Open
Abstract
Abstract
From the time oocytes leave quiescence, there are constant microenvironmental influences contributing to development, thus acquiring developmental competence is not a simple, linear phenomenon. During folliculogenesis, oocytes experience many morphological and cytological changes that contribute toward the acquisition of developmental competence, a process defined by an oocyte’s ability to progress through folliculogenesis, be fertilized, undergo cleavage, and develop into an embryo. Many factors, such as ovarian follicle size, cow age, and the morphology of the cumulus–oocyte complex, have been extensively investigated to understand this process. In parallel to aiding in the understanding of oocyte biology, these features have been used to characterize an oocyte’s ability to achieve competence. In addition, oocytes undergo intense gene transcription and protein translation to accumulate the maternal stores. When the oocyte is fully grown, most genes are transcriptionally inactive, and the chromatin is densely compacted. More recently, RNA profiling has been used to further define the transcriptional parameters that are associated with oocyte development. Here, focusing on cattle, we provide an overview of the experimental models commonly used to understand the underlying biology related to oocyte developmental competence. We compiled public data and showed that cattle oocytes can express over 15 000 protein-coding genes, suggesting a complex transcriptome landscape. Surprisingly, less than 2% of the expressed genes have been linked to developmental competence. The identification of the gene products that contribute to oocyte development, and understanding their biological function, are a vital component of our quest toward defining oocyte developmental competence at the molecular level.
Collapse
|
35
|
Bezerra FTG, Lima FEO, Paulino LRFM, Silva BR, Silva AWB, Souza ALP, van den Hurk R, Silva JRV. In vitro culture of secondary follicles and prematuration of cumulus-oocyte complexes from antral follicles increase the levels of maturation-related transcripts in bovine oocytes. Mol Reprod Dev 2019; 86:1874-1886. [PMID: 31621988 DOI: 10.1002/mrd.23284] [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: 04/09/2019] [Accepted: 10/02/2019] [Indexed: 11/11/2022]
Abstract
This study evaluates the levels of messenger RNA (mRNA) for eIF4E, PARN, H1FOO, cMOS, GDF9, and CCNB1 in oocytes from secondary and antral follicles at different stages of development. The effects of in vitro culture, in vitro prematuration, and in vitro maturation on the expression of these genes on oocytes were also analyzed. The results showed that mRNA levels for H1FOO, GDF9, and PARN were higher in oocytes from small, medium, and large antral follicles, respectively, than those seen in secondary follicles. Oocytes from small, medium, and large antral follicles had higher levels of CCNB1 than oocytes from secondary follicles. Oocytes from cultured secondary follicles had higher levels of GDF9, CMOS, PARN, eIF4E, CCNB1, and H1FOO than before culture. Prematured oocytes from small antral follicles had higher levels of mRNA for GDF9, PARN, and eIF4E than before culture. In addition, higher levels of cMOS and H1FOO were identified in prematured oocytes from medium antral follicles. In conclusion, follicular growth is associated with an increase in the expression of H1FOO, GDF9, CCNB1, and PARN. The culture of secondary follicles, prematuration, and maturation of oocytes from antral follicles increase the expression of eIF4E, PARN, H1FOO, cMOS, GDF9, and CCNB1.
Collapse
Affiliation(s)
- Francisco Taiã G Bezerra
- Laboratory of Biotechnology and Physiology of Reproduction (LABIREP), Federal University of Ceara, Sobral-CE, Brazil
| | - Francisco Edilcarlos O Lima
- Laboratory of Biotechnology and Physiology of Reproduction (LABIREP), Federal University of Ceara, Sobral-CE, Brazil
| | - Laís Rayani F M Paulino
- Laboratory of Biotechnology and Physiology of Reproduction (LABIREP), Federal University of Ceara, Sobral-CE, Brazil
| | - Bianca R Silva
- Laboratory of Biotechnology and Physiology of Reproduction (LABIREP), Federal University of Ceara, Sobral-CE, Brazil
| | - Anderson W B Silva
- Laboratory of Biotechnology and Physiology of Reproduction (LABIREP), Federal University of Ceara, Sobral-CE, Brazil
| | - Ana Liza P Souza
- Laboratory of Biotechnology and Physiology of Reproduction (LABIREP), Federal University of Ceara, Sobral-CE, Brazil
| | - Robert van den Hurk
- Department of Pathobiology, Faculty of Veterinary Medicine, Utrecht University, Utrecht, The Netherlands
| | - José Roberto V Silva
- Laboratory of Biotechnology and Physiology of Reproduction (LABIREP), Federal University of Ceara, Sobral-CE, Brazil
| |
Collapse
|
36
|
Caballero J, Blondin P, Vigneault C, Sirard MA, Richard FJ. The use of adenosine to inhibit oocyte meiotic resumption in Bos taurus during pre-IVM and its potential to improve oocyte competence. Theriogenology 2019; 142:207-215. [PMID: 31614287 DOI: 10.1016/j.theriogenology.2019.10.001] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2019] [Revised: 09/10/2019] [Accepted: 10/03/2019] [Indexed: 02/01/2023]
Abstract
One of the major challenges of artificial reproductive technologies is to develop new methods for producing greater numbers of embryos. An oocyte fosters the ability to develop into an embryo before oocyte meiotic resumption. The aim of the present study was to assess the effect of adenosine (ADO), a purine nucleoside found in follicular fluid, on the inhibition of oocyte meiotic resumption and the production of blastocysts. The results showed the efficacy of ADO to inhibit oocyte meiotic resumption. The use of ADO (3 mM) during a pre-in vitro maturation (pre-IVM) culture period of 6 h resulted in a significant increase (p < 0.05) of blastocysts compared to control conditions with no pre-IVM culture period. No effect on the percentage of cleavage was observed. The effect of adenosine on blastocyst yield was time- and concentration-dependent with an optimum effect at 3 mM for 6 h. Supplementing the ADO pre-IVM culture medium with estradiol, follicle-stimulating hormone, progesterone, epidermal growth factor, insulin-like growth factor-2 or reelin did not improve the blastocyst yield. Transcriptional analyses of ADO-treated cumulus cells revealed that NRP1, RELN, MAN1A1, THRA and GATM were up-regulated. Finally, bioinformatic analysis identified mitochondrial function as the top canonical pathway affected by ADO. This opens up new opportunities for further investigations.
Collapse
Affiliation(s)
- Julieta Caballero
- Centre de Recherche en Reproduction, Développement et Santé Intergénérationnelle, Département des Sciences Animales, Faculté des Sciences de L'agriculture et de L'alimentation, Université Laval, Québec, Québec, G1V 0A6, Canada
| | - Patrick Blondin
- L'Alliance Boviteq Inc, 19320 Grand Rang St-François, Saint-Hyacinthe, Québec, J2T 5H1, Canada
| | - Christian Vigneault
- L'Alliance Boviteq Inc, 19320 Grand Rang St-François, Saint-Hyacinthe, Québec, J2T 5H1, Canada
| | - Marc-André Sirard
- Centre de Recherche en Reproduction, Développement et Santé Intergénérationnelle, Département des Sciences Animales, Faculté des Sciences de L'agriculture et de L'alimentation, Université Laval, Québec, Québec, G1V 0A6, Canada
| | - François J Richard
- Centre de Recherche en Reproduction, Développement et Santé Intergénérationnelle, Département des Sciences Animales, Faculté des Sciences de L'agriculture et de L'alimentation, Université Laval, Québec, Québec, G1V 0A6, Canada.
| |
Collapse
|
37
|
Kshitiz, Ellison DD, Suhail Y, Afzal J, Woo L, Kilic O, Spees J, Levchenko A. Dynamic secretome of bone marrow-derived stromal cells reveals a cardioprotective biochemical cocktail. Proc Natl Acad Sci U S A 2019; 116:14374-14383. [PMID: 31239339 PMCID: PMC6628676 DOI: 10.1073/pnas.1902598116] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
Abstract
Transplanted stromal cells have demonstrated considerable promise as therapeutic agents in diverse disease settings. Paracrine signaling can be an important mediator of these therapeutic effects at the sites of acute or persistent injury and inflammation. As many stromal cell types, including bone marrow-derived stromal cells (BMSCs), display tissue-specific responses, there is a need to explore their secretory dynamics in the context of tissue and injury type. Paracrine signals are not static, and could encode contextual dynamics in the kinetic changes of the concentrations of the secreted ligands. However, precise measurement of dynamic and context-specific cellular secretory signatures, particularly in adherent cells, remains challenging. Here, by creating an experimental and computational analysis platform, we reconstructed dynamic secretory signatures of cells based on a very limited number of time points. By using this approach, we demonstrate that the secretory signatures of CD133-positive BMSCs are uniquely defined by distinct biological contexts, including signals from injured cardiac cells undergoing oxidative stress, characteristic of cardiac infarction. Furthermore, we show that the mixture of recombinant factors reproducing the dynamics of BMSC-generated secretion can mediate a highly effective rescue of cells injured by oxidative stress and an improved cardiac output. These results support the importance of the dynamic multifactorial paracrine signals in mediating remedial effects of stromal stem cells, and pave the way for stem cell-inspired cell-free treatments of cardiac and other injuries.
Collapse
Affiliation(s)
- Kshitiz
- Yale Institute of Systems Biology, Yale University, West Haven, CT 06516;
- Department of Biomedical Engineering, University of Connecticut Health Center, Farmington, CT 06030
| | - David D Ellison
- Department of Medicine, The Johns Hopkins School of Medicine, Baltimore, MD 21205
| | - Yasir Suhail
- Department of Biomedical Engineering, University of Connecticut Health Center, Farmington, CT 06030
| | - Junaid Afzal
- Department of Cardiology, University of California, San Francisco, CA 94115
| | - Laura Woo
- Department of Medicine, The Johns Hopkins School of Medicine, Baltimore, MD 21205
| | - Onur Kilic
- Yale Institute of Systems Biology, Yale University, West Haven, CT 06516
| | - Jeffrey Spees
- Department of Cellular Molecular and Biomedical Sciences, University of Vermont, Burlington, VT 05405
| | - Andre Levchenko
- Yale Institute of Systems Biology, Yale University, West Haven, CT 06516;
| |
Collapse
|
38
|
Transcriptome analysis of porcine immature oocytes and surrounding cumulus cells after vitrification and in vitro maturation. Theriogenology 2019; 134:90-97. [PMID: 31158735 DOI: 10.1016/j.theriogenology.2019.05.019] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2019] [Revised: 05/19/2019] [Accepted: 05/25/2019] [Indexed: 12/15/2022]
Abstract
Cryopreservation impairs oocyte quality, which may be associated with abnormal gene expression. Currently, alteration of mRNA levels in vitrified porcine oocytes has not been well characterized. The aim of this study was to analyze transcriptome profiles with RNA sequencing (RNA-seq) in porcine immature oocytes and their surrounding cumulus cells (CCs) after vitrification and in vitro maturation (IVM). There were 19 upregulated and 18 downregulated genes differentially expressed in vitrified oocytes, with no significant GO enrichment or KEGG pathway identified for these genes. In addition, CCs derived from vitrified oocytes had 40 significantly upregulated and 100 significantly downregulated genes. In total, 7 GO terms were significantly enriched in molecular function and biological process, and only MAPK signaling pathway reached significant enrichment based on KEGG analysis. Moreover, selected differentially expressed genes had similar expression patterns through comparison between results from qRT-PCR and RNA-Seq. In conclusion, our data provided detailed information on mRNA transcriptomes in porcine immature oocytes and CCs after vitrification and IVM, which offered now insights regarding reduced developmental potential of the vitrified oocytes.
Collapse
|
39
|
Biase FH, Hue I, Dickinson SE, Jaffrezic F, Laloe D, Lewin HA, Sandra O. Fine-tuned adaptation of embryo-endometrium pairs at implantation revealed by transcriptome analyses in Bos taurus. PLoS Biol 2019; 17:e3000046. [PMID: 30978203 PMCID: PMC6481875 DOI: 10.1371/journal.pbio.3000046] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2018] [Revised: 04/24/2019] [Accepted: 03/29/2019] [Indexed: 12/14/2022] Open
Abstract
Interactions between embryo and endometrium at implantation are critical for the progression of pregnancy. These reciprocal actions involve exchange of paracrine signals that govern implantation and placentation. However, it remains unknown how these interactions between the conceptus and the endometrium are coordinated at the level of an individual pregnancy. Under the hypothesis that gene expression in endometrium is dependent on gene expression of extraembryonic tissues and genes expressed in extraembryonic tissues are dependent of genes expressed in the endometrium, we performed an integrative analysis of transcriptome profiles of paired extraembryonic tissue and endometria obtained from cattle (Bos taurus) pregnancies initiated by artificial insemination. We quantified strong dependence (|r| > 0.95, empirical false discovery rate [eFDR] < 0.01) in transcript abundance of genes expressed in the extraembryonic tissues and genes expressed in the endometrium. The profiles of connectivity revealed distinct coexpression patterns of extraembryonic tissues with caruncular and intercaruncular areas of the endometrium. Notably, a subset of highly coexpressed genes between extraembryonic tissue (n = 229) and caruncular areas of the endometrium (n = 218, r > 0.9999, eFDR < 0.001) revealed a blueprint of gene expression specific to each pregnancy. Gene ontology analyses of genes coexpressed between extraembryonic tissue and endometrium revealed significantly enriched modules with critical contribution for implantation and placentation, including “in utero embryonic development,” “placenta development,” and “regulation of transcription.” Coexpressing modules were remarkably specific to caruncular or intercaruncular areas of the endometrium. The quantitative association between genes expressed in extraembryonic tissue and endometrium emphasize a coordinated communication between these two entities in mammals. We provide evidence that implantation in mammalian pregnancy relies on the ability of the extraembryonic tissue and the endometrium to develop a fine-tuned adaptive response characteristic of each pregnancy. An integrative analysis of interactions between conceptus and endometrium, in cattle, reveals complex regulatory networks operating at the time of implantation, highlighting the unique transcriptional blueprint of conceptus-maternal communication Implantation in mammals requires a complex crosstalk between the conceptus (the embryo and associated membranes) and the uterus. An imbalanced regulation of the factors contributing to these interactions has negative impacts on the attachment of the fetus, the progression of the pregnancy, and the progeny. Focusing on paired conceptus–endometrium analyses of individual pregnancies in cows, we have determined that communication at implantation encompasses synchronized genome-wide coregulation of genes. Gene regulatory interactions between one conceptus and the surrounding maternal tissue vary between endometrial regions containing or lacking glands. Our data reveal new insights, to our knowledge, on the coordination of molecular mechanisms that contribute to implantation and pregnancy establishment in mammals. We conclude that the biological response of the endometrium is embryo-specific, a phenomenon that deserves further investigation in the context of assisted reproductive technologies.
Collapse
Affiliation(s)
- Fernando H. Biase
- Department of Animal Sciences, Auburn University, Auburn, Alabama, United States of America
- * E-mail: (FB); (OS)
| | - Isabelle Hue
- UMR BDR, INRA, ENVA, Université Paris Saclay, Jouy-en-Josas, France
| | - Sarah E. Dickinson
- Department of Animal Sciences, Auburn University, Auburn, Alabama, United States of America
| | - Florence Jaffrezic
- UMR1313 GABI, INRA, AgroParisTech, Université Paris Saclay, Jouy-en-Josas, France
| | - Denis Laloe
- UMR1313 GABI, INRA, AgroParisTech, Université Paris Saclay, Jouy-en-Josas, France
| | - Harris A. Lewin
- Department of Evolution and Ecology, University of California, Davis, California, United States of America
| | - Olivier Sandra
- UMR BDR, INRA, ENVA, Université Paris Saclay, Jouy-en-Josas, France
- * E-mail: (FB); (OS)
| |
Collapse
|
40
|
Characterization of circular RNA expression profiles in cumulus cells from patients with polycystic ovary syndrome. Fertil Steril 2019; 111:1243-1251.e1. [PMID: 30979425 DOI: 10.1016/j.fertnstert.2019.02.023] [Citation(s) in RCA: 35] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2018] [Revised: 01/23/2019] [Accepted: 02/17/2019] [Indexed: 01/24/2023]
Abstract
OBJECTIVE To determine aberrant circular RNA (circRNA) expression profiles in cumulus cells from polycystic ovarian syndrome (PCOS) patients and identify their potential biological functions. DESIGN Circular RNAs microarray analysis of human tissue. SETTING University hospital. PATIENT(S) A total of 40 women, including 20 PCOS patients and 20 non-PCOS patients. INTERVENTION(S) None. MAIN OUTCOME MEASURE(S) A circRNA microarray containing probes that interrogate 21,442 human circRNAs to investigate differentially expressed circRNAs in cumulus cells, with potential target genes of significantly changed circRNAs and biological functions measured by microRNA support vector regression (mirSVR) and gene ontology (GO) analysis, with Kyoto Encyclopedia of Genes and Genomes (KEGG) pathway analysis. RESULT(S) A total of 1,032 circRNAs were identified that were differentially expressed in PCOS cumulus cells, including 311 circRNAs increase and 721 circRNAs decrease (fold change ≥2). Four aberrantly expressed circRNAs reached a statistically significant result after Bonferroni correction (with Bonferroni correction, only circRNAs for which P < .05/21,442 = 2.3 × 10-6 were considered statistically significant). Further analysis showed that aberrantly expressed circRNAs harbored microRNA binding sites, and some microRNAs were associated with PCOS. The GO and KEGG biological pathway analysis indicated that the genes with protein binding, mitotic nuclear envelope disassembly and metabolic pathways were statistically significantly enriched. CONCLUSION(S) Our data suggest that the aberrantly expressed circRNAs and their targeted genes might be associated with PCOS, providing new clues to find key diagnostic and therapeutic molecular biomarkers for PCOS patients.
Collapse
|
41
|
Jones ASK, Shikanov A. Follicle development as an orchestrated signaling network in a 3D organoid. J Biol Eng 2019; 13:2. [PMID: 30647770 PMCID: PMC6327556 DOI: 10.1186/s13036-018-0134-3] [Citation(s) in RCA: 52] [Impact Index Per Article: 10.4] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2018] [Accepted: 12/13/2018] [Indexed: 02/12/2023] Open
Abstract
The ovarian follicle is the structural and functional unit of the ovary, composed of the female gamete (the oocyte) and supportive somatic cells. Follicles are not only the source of a female's germ cell supply, but also secrete important hormones necessary for proper endocrine function. Folliculogenesis, the growth and maturation of the follicular unit, is a complex process governed by both intrafollicular crosstalk and pituitary-secreted hormones. While the later stages of this process are gonadotropin-dependent, early folliculogenesis appears to be controlled by the ovarian microenvironment and intrafollicular paracrine and autocrine signaling. In vitro follicle culture remains challenging because of the limited knowledge of growth factors and other cytokines influencing early follicle growth. Here we discuss the current state of knowledge on paracrine and autocrine signaling influencing primary follicles as they develop into the antral stage. Given the importance of intrafollicular signaling and the ovarian microenvironment, we reviewed the current engineering approaches for in vitro follicle culture, including 3D systems using natural hydrogels such as alginate and synthetic hydrogels such as poly(ethylene glycol). Our discussion is focused on what drives the proliferation of granulosa cells, development of the thecal layer, and antrum formation-three processes integral to follicle growth up to the antral stage. Further research in this area may reveal the mechanisms behind these complex signaling relationships within the follicle, leading to more successful and physiologically-relevant in vitro culture methods that will translate well to clinical applications.
Collapse
Affiliation(s)
- Andrea S. K. Jones
- Department of Biomedical Engineering, University of Michigan, 2126 Lurie Biomedical Engineering, 1101 Beal Avenue, Ann Arbor, MI 48109 USA
| | - Ariella Shikanov
- Department of Biomedical Engineering, University of Michigan, 2126 Lurie Biomedical Engineering, 1101 Beal Avenue, Ann Arbor, MI 48109 USA
| |
Collapse
|
42
|
Chermuła B, Brązert M, Jeseta M, Ożegowska K, Sujka-Kordowska P, Konwerska A, Bryja A, Kranc W, Jankowski M, Nawrocki MJ, Kocherova I, Celichowski P, Borowiec B, Popis M, Budna-Tukan J, Antosik P, Bukowska D, Brussow KP, Pawelczyk L, Bruska M, Zabel M, Nowicki M, Kempisty B. The Unique Mechanisms of Cellular Proliferation, Migration and Apoptosis are Regulated through Oocyte Maturational Development-A Complete Transcriptomic and Histochemical Study. Int J Mol Sci 2018; 20:ijms20010084. [PMID: 30587792 PMCID: PMC6337548 DOI: 10.3390/ijms20010084] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2018] [Revised: 12/06/2018] [Accepted: 12/21/2018] [Indexed: 12/16/2022] Open
Abstract
The growth and development of oocyte affect the functional activities of the surrounding somatic cells. These cells are regulated by various types of hormones, proteins, metabolites, and regulatory molecules through gap communication, ultimately leading to the development and maturation of oocytes. The close association between somatic cells and oocytes, which together form the cumulus-oocyte complexes (COCs), and their bi-directional communication are crucial for the acquisition of developmental competences by the oocyte. In this study, oocytes were extracted from the ovaries obtained from crossbred landrace gilts and subjected to in vitro maturation. RNA isolated from those oocytes was used for the subsequent microarray analysis. The data obtained shows, for the first time, variable levels of gene expression (fold changes higher than |2| and adjusted p-value < 0.05) belonging to four ontological groups: regulation of cell proliferation (GO:0042127), regulation of cell migration (GO:0030334), and regulation of programmed cell death (GO:0043067) that can be used together as proliferation, migration or apoptosis markers. We have identified several genes of porcine oocytes (ID2, VEGFA, BTG2, ESR1, CCND2, EDNRA, ANGPTL4, TGFBR3, GJA1, LAMA2, KIT, TPM1, VCP, GRID2, MEF2C, RPS3A, PLD1, BTG3, CD47, MITF), whose expression after in vitro maturation (IVM) is downregulated with different degrees. Our results may be helpful in further elucidating the molecular basis and functional significance of a number of gene markers associated with the processes of migration, proliferation and angiogenesis occurring in COCs.
Collapse
Affiliation(s)
- Błażej Chermuła
- Division of Infertility and Reproductive Endocrinology, Department of Gynecology, Obstetrics and Gynecological Oncology, Poznan University of Medical Sciences, 60-535 Poznań, Poland.
| | - Maciej Brązert
- Division of Infertility and Reproductive Endocrinology, Department of Gynecology, Obstetrics and Gynecological Oncology, Poznan University of Medical Sciences, 60-535 Poznań, Poland.
| | - Michal Jeseta
- Department of Obstetrics and Gynecology, University Hospital and Masaryk University, 601 77 Brno, Czech Republic.
| | - Katarzyna Ożegowska
- Division of Infertility and Reproductive Endocrinology, Department of Gynecology, Obstetrics and Gynecological Oncology, Poznan University of Medical Sciences, 60-535 Poznań, Poland.
| | - Patrycja Sujka-Kordowska
- Department of Histology and Embryology, Poznan University of Medical Sciences, 60-781 Poznań, Poland.
| | - Aneta Konwerska
- Department of Histology and Embryology, Poznan University of Medical Sciences, 60-781 Poznań, Poland.
| | - Artur Bryja
- Department of Anatomy, Poznan University of Medical Sciences, 60-781 Poznań, Poland.
| | - Wiesława Kranc
- Department of Anatomy, Poznan University of Medical Sciences, 60-781 Poznań, Poland.
| | - Maurycy Jankowski
- Department of Anatomy, Poznan University of Medical Sciences, 60-781 Poznań, Poland.
| | - Mariusz J Nawrocki
- Department of Anatomy, Poznan University of Medical Sciences, 60-781 Poznań, Poland.
| | - Ievgeniia Kocherova
- Department of Anatomy, Poznan University of Medical Sciences, 60-781 Poznań, Poland.
| | - Piotr Celichowski
- Department of Histology and Embryology, Poznan University of Medical Sciences, 60-781 Poznań, Poland.
| | - Blanka Borowiec
- Department of Anatomy, Poznan University of Medical Sciences, 60-781 Poznań, Poland.
| | - Małgorzata Popis
- Department of Anatomy, Poznan University of Medical Sciences, 60-781 Poznań, Poland.
| | - Joanna Budna-Tukan
- Department of Histology and Embryology, Poznan University of Medical Sciences, 60-781 Poznań, Poland.
| | - Paweł Antosik
- Veterinary Center, Nicolaus Copernicus University in Torun, 87-100 Toruń, Poland.
| | - Dorota Bukowska
- Veterinary Center, Nicolaus Copernicus University in Torun, 87-100 Toruń, Poland.
| | - Klaus P Brussow
- Veterinary Center, Nicolaus Copernicus University in Torun, 87-100 Toruń, Poland.
| | - Leszek Pawelczyk
- Division of Infertility and Reproductive Endocrinology, Department of Gynecology, Obstetrics and Gynecological Oncology, Poznan University of Medical Sciences, 60-535 Poznań, Poland.
| | - Małgorzata Bruska
- Department of Anatomy, Poznan University of Medical Sciences, 60-781 Poznań, Poland.
| | - Maciej Zabel
- Department of Histology and Embryology, Wroclaw University of Medical Sciences, 50-368 Wrocław, Poland.
- Division of Anatomy and Histology, University of Zielona Gora, 65-046 Zielona Góra, Poland.
| | - Michał Nowicki
- Department of Histology and Embryology, Poznan University of Medical Sciences, 60-781 Poznań, Poland.
| | - Bartosz Kempisty
- Department of Obstetrics and Gynecology, University Hospital and Masaryk University, 601 77 Brno, Czech Republic.
- Department of Histology and Embryology, Poznan University of Medical Sciences, 60-781 Poznań, Poland.
- Department of Anatomy, Poznan University of Medical Sciences, 60-781 Poznań, Poland.
| |
Collapse
|