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Santana PDPB, Pinheiro KDC, Pereira LCDS, Andrade SS, Aburjaile FF, Ramos PDCDA, de Souza EB, da Costa NN, Cordeiro MDS, Santos SDSD, Miranda MDS, Ramos RTJ, da Silva ALDC. RNA sequencing and gene co-expression network of in vitro matured oocytes and blastocysts of buffalo. Anim Reprod 2024; 21:e20230131. [PMID: 38912163 PMCID: PMC11192227 DOI: 10.1590/1984-3143-ar2023-0131] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2023] [Accepted: 04/24/2024] [Indexed: 06/25/2024] Open
Abstract
In reproductive technologies, uncovering the molecular aspects of oocyte and embryo competence under different conditions is crucial for refining protocols and enhancing efficiency. RNA-seq generates high-throughput data and provides transcriptomes that can undergo additional computational analyses. This study presented the transcriptomic profiles of in vitro matured oocytes and blastocysts produced in vitro from buffalo crossbred (Bubalus bubalis), coupled with gene co-expression and module preservation analysis. Cumulus Oophorus Complexes, obtained from slaughterhouse-derived ovaries, were subjected to in vitro maturation to yield metaphase II oocytes (616) or followed in vitro fertilization and culture to yield blastocysts for sequencing (526). Oocyte maturation (72%, ±3.34 sd) and embryo development (21.3%, ±4.18 sd) rates were obtained from three in vitro embryo production routines following standard protocols. Sequencing of 410 metaphase II oocytes and 70 hatched blastocysts (grade 1 and 2) identified a total of 13,976 genes, with 62% being ubiquitously expressed (8,649). Among them, the differentially expressed genes (4,153) and the strongly variable genes with the higher expression (fold-change above 11) were highlighted in oocytes (BMP15, UCHL1, WEE1, NLRPs, KPNA7, ZP2, and ZP4) and blastocysts (APOA1, KRT18, ANXA2, S100A14, SLC34A2, PRSS8 and ANXA2) as representative indicators of molecular quality. Additionally, genes exclusively found in oocytes (224) and blastocysts (2,200) with specific biological functions were identified. Gene co-expression network and module preservation analysis revealed strong preservation of functional modules related to exosome components, steroid metabolism, cell proliferation, and morphogenesis. However, cell cycle and amino acid transport modules exhibited weak preservation, which may reflect differences in embryo development kinetics and the activation of cell signaling pathways between buffalo and bovine. This comprehensive transcriptomic profile serves as a valuable resource for assessing the molecular quality of buffalo oocytes and embryos in future in vitro embryo production assays.
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Affiliation(s)
| | | | | | - Soraya Silva Andrade
- Laboratório de Genômica e Bioinformática, Universidade Federal do Pará, Belém, PA, Brasil
| | | | | | - Eduardo Baia de Souza
- Laboratório de Fertilização In Vitro, Instituto de Ciências Biológicas, Universidade Federal do Pará, Belém, PA, Brasil
| | - Nathalia Nogueira da Costa
- Laboratório de Fertilização In Vitro, Instituto de Ciências Biológicas, Universidade Federal do Pará, Belém, PA, Brasil
| | | | | | - Moysés dos Santos Miranda
- Laboratório de Fertilização In Vitro, Instituto de Ciências Biológicas, Universidade Federal do Pará, Belém, PA, Brasil
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D’Occhio MJ, Campanile G, Baruselli PS, Porto Neto LR, Hayes BJ, Snr AC, Fortes MRS. Pleomorphic adenoma gene1 in reproduction and implication for embryonic survival in cattle: a review. J Anim Sci 2024; 102:skae103. [PMID: 38586898 PMCID: PMC11056886 DOI: 10.1093/jas/skae103] [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: 12/07/2023] [Accepted: 04/05/2024] [Indexed: 04/09/2024] Open
Abstract
The pleomorphic adenoma gene1 (PLAG1) encodes a DNA-binding, C2H2 zinc-finger protein which acts as a transcription factor that regulates the expression of diverse genes across different organs and tissues; hence, the name pleomorphic. Rearrangements of the PLAG1 gene, and/or overexpression, are associated with benign tumors and cancers in a variety of tissues. This is best described for pleomorphic adenoma of the salivary glands in humans. The most notable expression of PLAG1 occurs during embryonic and fetal development, with lesser expression after birth. Evidence has accumulated of a role for PLAG1 protein in normal early embryonic development and placentation in mammals. PLAG1 protein influences the expression of the ike growth factor 2 (IGF2) gene and production of IGF2 protein. IGF2 is an important mitogen in ovarian follicles/oocytes, embryos, and fetuses. The PLAG1-IGF2 axis, therefore, provides one pathway whereby PLAG1 protein can influence embryonic survival and pregnancy. PLAG1 also influences over 1,000 other genes in embryos including those associated with ribosomal assembly and proteins. Brahman (Bos indicus) heifers homozygous for the PLAG1 variant, rs109815800 (G > T), show greater fertility than contemporary heifers with either one, or no copy, of the variant. Greater fertility in heifers homozygous for rs109815800 could be the result of early puberty and/or greater embryonic survival. The present review first looks at the broader roles of the PLAG1 gene and PLAG1 protein and then focuses on the emerging role of PLAG1/PLAG1 in embryonic development and pregnancy. A deeper understanding of factors which influence embryonic development is required for the next transformational increase in embryonic survival and successful pregnancy for both in vivo and in vitro derived embryos in cattle.
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Affiliation(s)
- Michael J D’Occhio
- School of Life and Environmental Sciences, Faculty of Science, The University of Sydney, Sydney, NSW, Australia
| | - Giuseppe Campanile
- Department of Veterinary Medicine and Animal Production, University of Naples Federico II, Naples, Italy
| | - Pietro S Baruselli
- Faculty of Veterinary Medicine and Animal Science, Department of Animal Reproduction, University of Sao Paulo, Sao Paulo, Brazil
| | | | - Ben J Hayes
- Queensland Alliance for Agriculture and Food Innovation, The University of Queensland, Brisbane, QLD, Australia
| | - Alf Collins Snr
- CBV Brahman, Marlborough, Central Queensland, QLD, Australia
| | - Marina R S Fortes
- School of Chemistry and Molecular Biosciences, The University of Queensland, Brisbane, QLD, Australia
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Rabel RAC, Marchioretto PV, Bangert EA, Wilson K, Milner DJ, Wheeler MB. Pre-Implantation Bovine Embryo Evaluation-From Optics to Omics and Beyond. Animals (Basel) 2023; 13:2102. [PMID: 37443900 DOI: 10.3390/ani13132102] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2023] [Revised: 06/16/2023] [Accepted: 06/17/2023] [Indexed: 07/15/2023] Open
Abstract
Approximately 80% of the ~1.5 million bovine embryos transferred in 2021 were in vitro produced. However, only ~27% of the transferred IVP embryos will result in live births. The ~73% pregnancy failures are partly due to transferring poor-quality embryos, a result of erroneous stereomicroscopy-based morphological evaluation, the current method of choice for pre-transfer embryo evaluation. Numerous microscopic (e.g., differential interference contrast, electron, fluorescent, time-lapse, and artificial-intelligence-based microscopy) and non-microscopic (e.g., genomics, transcriptomics, epigenomics, proteomics, metabolomics, and nuclear magnetic resonance) methodologies have been tested to find an embryo evaluation technique that is superior to morphologic evaluation. Many of these research tools can accurately determine embryo quality/viability; however, most are invasive, expensive, laborious, technically sophisticated, and/or time-consuming, making them futile in the context of in-field embryo evaluation. However accurate they may be, using complex methods, such as RNA sequencing, SNP chips, mass spectrometry, and multiphoton microscopy, at thousands of embryo production/collection facilities is impractical. Therefore, future research is warranted to innovate field-friendly, simple benchtop tests using findings already available, particularly from omics-based research methodologies. Time-lapse monitoring and artificial-intelligence-based automated image analysis also have the potential for accurate embryo evaluation; however, further research is warranted to innovate economically feasible options for in-field applications.
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Affiliation(s)
- R A Chanaka Rabel
- Department of Animal Sciences, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA
- Carl R. Woese Institute for Genomic Biology, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA
| | - Paula V Marchioretto
- Department of Animal Sciences, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA
| | - Elizabeth A Bangert
- Department of Animal Sciences, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA
| | - Kenneth Wilson
- Department of Animal Sciences, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA
| | - Derek J Milner
- Department of Animal Sciences, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA
- Carl R. Woese Institute for Genomic Biology, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA
| | - Matthew B Wheeler
- Department of Animal Sciences, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA
- Carl R. Woese Institute for Genomic Biology, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA
- Department of Bioengineering, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA
- Department of Biomedical and Translational Sciences, Carle-Illinois College of Medicine, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA
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Ledesma AV, Mueller ML, Van Eenennaam AL. Review: Progress in producing chimeric ungulate livestock for agricultural applications. Animal 2023; 17 Suppl 1:100803. [PMID: 37567671 DOI: 10.1016/j.animal.2023.100803] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2022] [Revised: 03/29/2023] [Accepted: 03/30/2023] [Indexed: 08/13/2023] Open
Abstract
The progress made in recent years in the derivation and culture of pluripotent stem cells from farm animals opens up the possibility of creating livestock chimeras. Chimeras producing gametes exclusively derived from elite donor stem cells could pass superior genetics on to the next generation and thereby reduce the genetic lag that typically exists between the elite breeding sector and the commercial production sector, especially for industries like beef and sheep where genetics is commonly disseminated through natural service mating. Chimeras carrying germ cells generated from genome-edited or genetically engineered pluripotent stem cells could further disseminate useful genomic alterations such as climate adaptation, animal welfare improvements, the repair of deleterious genetic conditions, and/or the elimination of undesired traits such as disease susceptibility to the next generation. Despite the successful production of chimeras with germ cells generated from pluripotent donor stem cells injected into preimplantation-stage blastocysts in model species, there are no documented cases of this occurring in livestock. Here, we review the literature on the derivation of pluripotent stem cells from ungulates, and progress in the production of chimeric ungulate livestock for agricultural applications, drawing on insights from studies done in model species, and discuss future possibilities of this fast-moving and developing field. Aside from the technical aspects, the consistency of the regulatory approach taken by different jurisdictions towards chimeric ungulate livestock with germ cells generated from pluripotent stem cells and their progeny will be an important determinant of breeding industry uptake and adoption in animal agriculture.
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Affiliation(s)
- Alba V Ledesma
- Department of Animal Science, University of California, One Shields Avenue, Davis, CA 95616, USA
| | - Maci L Mueller
- Department of Animal Science, University of California, One Shields Avenue, Davis, CA 95616, USA
| | - Alison L Van Eenennaam
- Department of Animal Science, University of California, One Shields Avenue, Davis, CA 95616, USA.
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Li W, Li K, He X, Jiang Y, Lan R, Hong Q, Liu Y, Chu M. ALAS1 associated with goat kidding number trait was regulated by the transcription factor ASCL2 to affect granulosa cell proliferation. Anim Genet 2023; 54:189-198. [PMID: 36632647 DOI: 10.1111/age.13287] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2022] [Revised: 12/08/2022] [Accepted: 12/09/2022] [Indexed: 01/13/2023]
Abstract
ALAS1 is a member of the α-oxoamine synthase family, which is the first rate-limiting enzyme for heme synthesis and is important for maintaining intracellular heme levels. In the ovary, ALAS1 is associated with the regulation of ovulation-related mitochondrial P450 cytochromes, steroid metabolism, and steroid hormone production. However, there are few studies on the relationship between ALAS1 and reproductive traits in goats. In this study, a mutation located in the promoter region of ALAS1 (g.48791372C>A) was found to be significantly (p < 0.05) associated with the kidding number of Yunshang black goats. Specifically, the mean kidding number in the first three litters and the kidding numbers of all three litters were significantly (p < 0.05) higher in individuals with the CA genotype or AA genotype than in those with the CC genotype. To further investigate the regulatory mechanism of ALAS1, the expression of ALAS1 in goat ovarian tissues with different genotypes was verified by real-time quantitative PCR. The results showed that the expression of ALAS1 was significantly higher in the ovaries of individuals with AA genotype than those with AC and CC genotypes (p < 0.01), and the expression trend of transcription factor ASCL2 was consistent with ALAS1. Additionally, the ALAS1 g.48791372C>A mutation created a new binding site for the transcription factor ASCL2. The luciferase activity assay indicated that the mutation increased the promoter activity of ALAS1. Overexpression of the transcription factor ASCL2 induced increased expression of ALAS1 in goat granulosa cells (p < 0.05). The opposite trend was shown for the inhibition of ASCL2 expression. The results of real-time quantitative PCR, EdU and Cell Counting Kit-8 assays indicated that the transcription factor ASCL2 increased the proliferation of goat granulosa cells by mediating the expression of ALAS1. In conclusion, the transcription factor ASCL2 positively regulated the transcriptional activity and expression levels of ALAS1, altering granulosa cell proliferation and the kidding number in goats.
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Affiliation(s)
- Wentao Li
- Key Laboratory of Animal Genetics, Breeding and Reproduction of Ministry of Agriculture and Rural Affairs, Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Kunyu Li
- Key Laboratory of Animal Genetics, Breeding and Reproduction of Ministry of Agriculture and Rural Affairs, Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Xiaoyun He
- Key Laboratory of Animal Genetics, Breeding and Reproduction of Ministry of Agriculture and Rural Affairs, Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Yanting Jiang
- Yunnan Animal Science and Veterinary Institute, Kunming, China
| | - Rong Lan
- Yunnan Animal Science and Veterinary Institute, Kunming, China
| | - Qionghua Hong
- Yunnan Animal Science and Veterinary Institute, Kunming, China
| | - Yufang Liu
- Key Laboratory of Animal Genetics, Breeding and Reproduction of Ministry of Agriculture and Rural Affairs, Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Mingxing Chu
- Key Laboratory of Animal Genetics, Breeding and Reproduction of Ministry of Agriculture and Rural Affairs, Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing, China
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Wan Y, Muhammad T, Huang T, Lv Y, Sha Q, Yang S, Lu G, Chan WY, Ma J, Liu H. IGF2 reduces meiotic defects in oocytes from obese mice and improves embryonic developmental competency. Reprod Biol Endocrinol 2022; 20:101. [PMID: 35836183 PMCID: PMC9281013 DOI: 10.1186/s12958-022-00972-9] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/18/2022] [Accepted: 06/22/2022] [Indexed: 11/30/2022] Open
Abstract
BACKGROUND Maternal obesity is a global issue that has devastating effects across the reproductive spectrum such as meiotic defects in oocytes, consequently worsening pregnancy outcomes. Different studies have shown that such types of meiotic defects originated from the oocytes of obese mothers. Thus, there is an urgent need to develop strategies to reduce the incidence of obesity-related oocyte defects that adversely affect pregnancy outcomes. Multiple growth factors have been identified as directly associated with female reproduction; however, the impact of various growth factors on female fertility in response to obesity remains poorly understood. METHODS The immature GV-stage oocytes from HFD female mice were collected and cultured in vitro in two different groups (HFD oocytes with and without 50 nM IGF2), however; the oocytes from ND mice were used as a positive control. HFD oocytes treated with or without IGF2 were further used to observe the meiotic structure using different analysis including, the spindle and chromosomal analysis, reactive oxygen species levels, mitochondrial functional activities, and early apoptotic index using immunofluorescence. Additionally, the embryonic developmental competency and embryos quality of IGF2-treated zygotes were also determined. RESULTS In our findings, we observed significantly reduced contents of insulin-like growth factor 2 (IGF2) in the serum and oocytes of obese mice. Our data indicated supplementation of IGF2 in a culture medium improves the blastocyst formation: from 46% in the HFD group to 61% in the HFD + IGF2-treatment group (50 nM IGF2). Moreover, adding IGF2 to the culture medium reduces the reactive oxygen species index and alleviates the frequency of spindle/chromosome defects. We found increased mitochondrial functional activity in oocytes from obese mice after treating the oocytes with IGF2: observed elevated level of adenosine triphosphate, increased mitochondrial distribution, higher mitochondrial membrane potentials, and reduced mitochondrial ultrastructure defects. Furthermore, IGF2 administration also increases the overall protein synthesis and decreases the apoptotic index in oocytes from obese mice. CONCLUSIONS Collectively, our findings are strongly in favor of adding IGF2 in culture medium to overcome obesity-related meiotic structural-developmental defects by helping ameliorate the known sub-optimal culturing conditions that are currently standard with assisted reproduction technologies.
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Affiliation(s)
- Yanling Wan
- Center for Reproductive Medicine, Shandong University, Jinan, Shandong, China
- Key Laboratory of Reproductive Endocrinology of Ministry of Education, Shandong University, Jinan, Shandong, China
- Shandong Key Laboratory of Reproductive Medicine, Jinan, Shandong, China
- Shandong Provincial Clinical Research Center for Reproductive Health, Jinan, Shandong, China
- Shandong Technology Innovation Center for Reproductive Health, Jinan, Shandong, China
- National Research Center for Assisted Reproductive Technology and Reproductive Genetics, Shandong University, Jinan, Shandong, China
| | - Tahir Muhammad
- Center for Reproductive Medicine, Shandong University, Jinan, Shandong, China
- Key Laboratory of Reproductive Endocrinology of Ministry of Education, Shandong University, Jinan, Shandong, China
- Shandong Key Laboratory of Reproductive Medicine, Jinan, Shandong, China
- Shandong Provincial Clinical Research Center for Reproductive Health, Jinan, Shandong, China
- Shandong Technology Innovation Center for Reproductive Health, Jinan, Shandong, China
- National Research Center for Assisted Reproductive Technology and Reproductive Genetics, Shandong University, Jinan, Shandong, China
- Institute of Molecular Biology and Biotechnology, The University of Lahore, Lahore, Pakistan
| | - Tao Huang
- Center for Reproductive Medicine, Shandong University, Jinan, Shandong, China
- Key Laboratory of Reproductive Endocrinology of Ministry of Education, Shandong University, Jinan, Shandong, China
- Shandong Key Laboratory of Reproductive Medicine, Jinan, Shandong, China
- Shandong Provincial Clinical Research Center for Reproductive Health, Jinan, Shandong, China
- Shandong Technology Innovation Center for Reproductive Health, Jinan, Shandong, China
- National Research Center for Assisted Reproductive Technology and Reproductive Genetics, Shandong University, Jinan, Shandong, China
| | - Yue Lv
- Center for Reproductive Medicine, Shandong University, Jinan, Shandong, China
- Key Laboratory of Reproductive Endocrinology of Ministry of Education, Shandong University, Jinan, Shandong, China
- Shandong Key Laboratory of Reproductive Medicine, Jinan, Shandong, China
- Shandong Provincial Clinical Research Center for Reproductive Health, Jinan, Shandong, China
- Shandong Technology Innovation Center for Reproductive Health, Jinan, Shandong, China
- National Research Center for Assisted Reproductive Technology and Reproductive Genetics, Shandong University, Jinan, Shandong, China
- Research Unit of Gametogenesis and Health of ART-Offspring, Chinese Academy of Medical Sciences, Beijing, China
| | - Qianqian Sha
- Fertility Preservation Laboratory, Reproductive Medicine Center, Guangdong Second Provincial General Hospital, Guangzhou, Guangdong, China
| | - Shuang Yang
- Department of Physiology School of Basic Medical Sciences Cheeloo College of Medicine Shandong University, Jinan, Shandong, China
| | - Gang Lu
- CUHK-SDU Joint Laboratory on Reproductive Genetics, School of Biomedical Sciences, Faculty of Medicine, The Chinese University of Hong Kong, Hong Kong, China
| | - Wai-Yee Chan
- CUHK-SDU Joint Laboratory on Reproductive Genetics, School of Biomedical Sciences, Faculty of Medicine, The Chinese University of Hong Kong, Hong Kong, China
| | - Jinlong Ma
- Center for Reproductive Medicine, Shandong University, Jinan, Shandong, China
- Shandong Key Laboratory of Reproductive Medicine, Jinan, Shandong, China
- Shandong Provincial Clinical Research Center for Reproductive Health, Jinan, Shandong, China
- Shandong Technology Innovation Center for Reproductive Health, Jinan, Shandong, China
- CUHK-SDU Joint Laboratory on Reproductive Genetics, School of Biomedical Sciences, Faculty of Medicine, The Chinese University of Hong Kong, Hong Kong, China
| | - Hongbin Liu
- Center for Reproductive Medicine, Shandong University, Jinan, Shandong, China.
- Key Laboratory of Reproductive Endocrinology of Ministry of Education, Shandong University, Jinan, Shandong, China.
- Shandong Key Laboratory of Reproductive Medicine, Jinan, Shandong, China.
- Shandong Provincial Clinical Research Center for Reproductive Health, Jinan, Shandong, China.
- Shandong Technology Innovation Center for Reproductive Health, Jinan, Shandong, China.
- National Research Center for Assisted Reproductive Technology and Reproductive Genetics, Shandong University, Jinan, Shandong, China.
- Research Unit of Gametogenesis and Health of ART-Offspring, Chinese Academy of Medical Sciences, Beijing, China.
- CUHK-SDU Joint Laboratory on Reproductive Genetics, School of Biomedical Sciences, Faculty of Medicine, The Chinese University of Hong Kong, Hong Kong, China.
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Lim KS, Kim HC, Choi BH, Son JW, Lee KT, Choi TJ, Cho YM, Chai HH, Park JE, Park W, Lim C, Kim JM, Lim D. Identification of Monoallelically Expressed Genes Associated with Economic Traits in Hanwoo (Korean Native Cattle). Animals (Basel) 2021; 12:ani12010084. [PMID: 35011190 PMCID: PMC8749587 DOI: 10.3390/ani12010084] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2021] [Revised: 12/25/2021] [Accepted: 12/27/2021] [Indexed: 11/16/2022] Open
Abstract
Hanwoo, an indigenous Korean cattle breed, has been genetically improved by selecting superior sires called Korean-proven bulls. However, cows still contribute half of the genetic stock of their offspring, and allelic-specific expressed genes have potential, as selective targets of cows, to enhance genetic gain. The aim of this study is to identify genes that have MAEs based on both the genome and transcriptome and to estimate their effects on breeding values (BVs) for economically important traits in Hanwoo. We generated resequencing data for the parents and RNA-sequencing data for the muscle, fat, and brain tissues of the offspring. A total of 3801 heterozygous single nucleotide polymorphisms (SNPs) in offspring were identified and they were located in 1569 genes. Only 14 genes showed MAE (seven expressing maternal alleles and seven expressing paternal alleles). Tissue-specific MAE was observed, and LANCL1 showed maternal allele expression across all tissues. MAE genes were enriched for the biological process of cell death and angiogenesis, which included ACKR3 and PDCL3 genes, whose SNPs were significantly associated with BVs of lean meat production-related traits, such as weight at 12 months of age, carcass weight, and loin eye area. In the current study, monoallelically expressed genes were identified in various adult tissues and these genes were associated with genetic capacity in Hanwoo.
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Affiliation(s)
- Kyu-Sang Lim
- Department of Animal Science, Iowa State University, Ames, IA 50011, USA
- Animal Genomics and Bioinformatics Division, National Institute of Animal Science, RDA, Wanju 55365, Jeollabuk-do, Korea
| | - Hyung-Chul Kim
- Animal Genomics and Bioinformatics Division, National Institute of Animal Science, RDA, Wanju 55365, Jeollabuk-do, Korea
| | - Bong-Hwan Choi
- Animal Genomics and Bioinformatics Division, National Institute of Animal Science, RDA, Wanju 55365, Jeollabuk-do, Korea
| | - Ju-Whan Son
- Animal Genomics and Bioinformatics Division, National Institute of Animal Science, RDA, Wanju 55365, Jeollabuk-do, Korea
| | - Kyung-Tai Lee
- Animal Genomics and Bioinformatics Division, National Institute of Animal Science, RDA, Wanju 55365, Jeollabuk-do, Korea
| | - Tae-Jeong Choi
- Animal Genomics and Bioinformatics Division, National Institute of Animal Science, RDA, Wanju 55365, Jeollabuk-do, Korea
| | - Yong-Min Cho
- Animal Genomics and Bioinformatics Division, National Institute of Animal Science, RDA, Wanju 55365, Jeollabuk-do, Korea
| | - Han-Ha Chai
- Animal Genomics and Bioinformatics Division, National Institute of Animal Science, RDA, Wanju 55365, Jeollabuk-do, Korea
| | - Jong-Eun Park
- Animal Genomics and Bioinformatics Division, National Institute of Animal Science, RDA, Wanju 55365, Jeollabuk-do, Korea
| | - Woncheoul Park
- Animal Genomics and Bioinformatics Division, National Institute of Animal Science, RDA, Wanju 55365, Jeollabuk-do, Korea
| | - Chiwoong Lim
- Department of Animal Science and Technology, Chung-Ang University, Anseong 17546, Gyeonggi-do, Korea
| | - Jun-Mo Kim
- Department of Animal Science and Technology, Chung-Ang University, Anseong 17546, Gyeonggi-do, Korea
| | - Dajeong Lim
- Animal Genomics and Bioinformatics Division, National Institute of Animal Science, RDA, Wanju 55365, Jeollabuk-do, Korea
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Wrenzycki C. Parameters to identify good quality oocytes and embryos in cattle. Reprod Fertil Dev 2021; 34:190-202. [PMID: 35231232 DOI: 10.1071/rd21283] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
Oocyte/embryo selection methodologies are either invasive or noninvasive and can be applied at various stages of development from the oocyte to cleaved embryos and up to the blastocyst stage. Morphology and the proportion of embryos developing to the blastocyst stage are important criteria to assess developmental competence. Evaluation of morphology remains the method of choice for selecting viable oocytes for IVP or embryos prior to transfer. Although non-invasive approaches are improving, invasive ones have been extremely helpful in finding candidate genes to determine oocyte/embryo quality. There is still a strong need for further refinement of existing oocyte and embryo selection methods and quality parameters. The development of novel, robust and non-invasive procedures will ensure that only embryos with the highest developmental potential are chosen for transfer. In the present review, various methods for assessing the quality of oocytes and preimplantation embryos, particularly in cattle, are considered. These methods include assessment of morphology including different staining procedures, transcriptomic and proteomic analyses, metabolic profiling, as well as the use of artificial intelligence technologies.
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Affiliation(s)
- Christine Wrenzycki
- Chair for Molecular Reproductive Medicine, Clinic for Veterinary Obstetrics, Gynecology and Andrology of Large and Small Animals, Justus-Liebig-University Giessen, Frankfurter Straße 106, Giessen 35392, Germany
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9
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Chen PR, Redel BK, Kerns KC, Spate LD, Prather RS. Challenges and Considerations during In Vitro Production of Porcine Embryos. Cells 2021; 10:cells10102770. [PMID: 34685749 PMCID: PMC8535139 DOI: 10.3390/cells10102770] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2021] [Revised: 10/12/2021] [Accepted: 10/13/2021] [Indexed: 02/02/2023] Open
Abstract
Genetically modified pigs have become valuable tools for generating advances in animal agriculture and human medicine. Importantly, in vitro production and manipulation of embryos is an essential step in the process of creating porcine models. As the in vitro environment is still suboptimal, it is imperative to examine the porcine embryo culture system from several angles to identify methods for improvement. Understanding metabolic characteristics of porcine embryos and considering comparisons with other mammalian species is useful for optimizing culture media formulations. Furthermore, stressors arising from the environment and maternal or paternal factors must be taken into consideration to produce healthy embryos in vitro. In this review, we progress stepwise through in vitro oocyte maturation, fertilization, and embryo culture in pigs to assess the status of current culture systems and address points where improvements can be made.
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Affiliation(s)
- Paula R. Chen
- Division of Animal Sciences, University of Missouri, Columbia, MO 65211, USA
| | | | - Karl C. Kerns
- Department of Animal Science, Iowa State University, Ames, IA 50011, USA
| | - Lee D. Spate
- Division of Animal Sciences, University of Missouri, Columbia, MO 65211, USA
- National Swine Resource and Research Center, University of Missouri, Columbia, MO 65211, USA
| | - Randall S. Prather
- Division of Animal Sciences, University of Missouri, Columbia, MO 65211, USA
- National Swine Resource and Research Center, University of Missouri, Columbia, MO 65211, USA
- Correspondence:
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10
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Li X, Zou C, Li M, Fang C, Li K, Liu Z, Li C. Transcriptome Analysis of In Vitro Fertilization and Parthenogenesis Activation during Early Embryonic Development in Pigs. Genes (Basel) 2021; 12:genes12101461. [PMID: 34680856 PMCID: PMC8535918 DOI: 10.3390/genes12101461] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2021] [Revised: 09/14/2021] [Accepted: 09/15/2021] [Indexed: 11/16/2022] Open
Abstract
Parthenogenesis activation (PA), as an important artificial breeding method, can stably preserve the dominant genotype of a species. However, the delayed development of PA embryos is still overly severe and largely leads to pre-implantation failure in pigs. The mechanisms underlying the deficiencies of PA embryos have not been completely understood. For further understanding of the molecular mechanism behind PA embryo failure, we performed transcriptome analysis among pig oocytes (meiosis II, MII) and early embryos at three developmental stages (zygote, morula, and blastocyst) in vitro fertilization (IVF) and PA group. Totally, 11,110 differentially expressed genes (DEGs), 4694 differentially expressed lincRNAs (DELs) were identified, and most DEGs enriched the regulation of apoptotic processes. Through cis- and trans-manner functional prediction, we found that hub lincRNAs were mostly involved in abnormal parthenogenesis embryonic development. In addition, twenty DE imprinted genes showed that some paternally imprinted genes in IVF displayed higher expression than that in PA. Notably, we identified that three DELs of imprinted genes (MEST, PLAGL1, and DIRAS3) were up regulated in IVF, and there was no significant change in PA group. Disordered expression of key genes for embryonic development might play key roles in abnormal parthenogenesis embryonic development. Our study indicates that embryos derived from different production techniques have varied in vitro development to the blastocyst stage, and they also affect the transcription level of corresponding genes, such as imprinted genes. This work will help future research on these genes and molecular-assisted breeding for pig parthenotes.
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Affiliation(s)
- Xin Li
- Key Laboratory of Agricultural Animal Genetics, Breeding and Reproduction of the Ministry of Education and Key Laboratory of Swine Genetics and Breeding of the Ministry of Agriculture, Huazhong Agricultural University, Wuhan 430070, China; (X.L.); (C.Z.); (M.L.); (C.F.)
- The Cooperative Innovation Center for Sustainable Pig Production, Wuhan 430070, China
| | - Cheng Zou
- Key Laboratory of Agricultural Animal Genetics, Breeding and Reproduction of the Ministry of Education and Key Laboratory of Swine Genetics and Breeding of the Ministry of Agriculture, Huazhong Agricultural University, Wuhan 430070, China; (X.L.); (C.Z.); (M.L.); (C.F.)
- The Cooperative Innovation Center for Sustainable Pig Production, Wuhan 430070, China
| | - Mengxun Li
- Key Laboratory of Agricultural Animal Genetics, Breeding and Reproduction of the Ministry of Education and Key Laboratory of Swine Genetics and Breeding of the Ministry of Agriculture, Huazhong Agricultural University, Wuhan 430070, China; (X.L.); (C.Z.); (M.L.); (C.F.)
- The Cooperative Innovation Center for Sustainable Pig Production, Wuhan 430070, China
| | - Chengchi Fang
- Key Laboratory of Agricultural Animal Genetics, Breeding and Reproduction of the Ministry of Education and Key Laboratory of Swine Genetics and Breeding of the Ministry of Agriculture, Huazhong Agricultural University, Wuhan 430070, China; (X.L.); (C.Z.); (M.L.); (C.F.)
- The Cooperative Innovation Center for Sustainable Pig Production, Wuhan 430070, China
| | - Kui Li
- Agricultural Genome Institute at Shenzhen, Chinese Academy of Agricultural Sciences, Shenzhen 518124, China;
- State Key Laboratory of Animal Nutrition, Key Laboratory of Animal Genetics Breeding and Reproduction of Ministry of Agriculture and Rural Affairs of China, Institute of Animal Sciences, Chinese Academy of Agricultural Sciences, Beijing 100193, China
| | - Zhiguo Liu
- State Key Laboratory of Animal Nutrition, Key Laboratory of Animal Genetics Breeding and Reproduction of Ministry of Agriculture and Rural Affairs of China, Institute of Animal Sciences, Chinese Academy of Agricultural Sciences, Beijing 100193, China
- Correspondence: (Z.L.); (C.L.)
| | - Changchun Li
- Key Laboratory of Agricultural Animal Genetics, Breeding and Reproduction of the Ministry of Education and Key Laboratory of Swine Genetics and Breeding of the Ministry of Agriculture, Huazhong Agricultural University, Wuhan 430070, China; (X.L.); (C.Z.); (M.L.); (C.F.)
- The Cooperative Innovation Center for Sustainable Pig Production, Wuhan 430070, China
- Correspondence: (Z.L.); (C.L.)
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11
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Contreras-Benicio D, Castro-Valenzuela BE, Grado-Ahuir JA, Burrola-Barraza M. Well-of-the-well (WOW) versus polyester mesh (PM): a comparison of single-embryo culture systems in bovines. REV COLOMB CIENC PEC 2021. [DOI: 10.17533/udea.rccp.v35n2a03] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
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12
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Liu R, Tearle R, Low WY, Chen T, Thomsen D, Smith TPL, Hiendleder S, Williams JL. Distinctive gene expression patterns and imprinting signatures revealed in reciprocal crosses between cattle sub-species. BMC Genomics 2021; 22:410. [PMID: 34082698 PMCID: PMC8176687 DOI: 10.1186/s12864-021-07667-2] [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: 12/21/2020] [Accepted: 04/21/2021] [Indexed: 01/06/2023] Open
Abstract
Background There are two genetically distinct subspecies of cattle, Bos taurus taurus and Bos taurus indicus, which arose from independent domestication events. The two types of cattle show substantial phenotypic differences, some of which emerge during fetal development and are reflected in birth outcomes, including birth weight. We explored gene expression profiles in the placenta and four fetal tissues at mid-gestation from one taurine (Bos taurus taurus; Angus) and one indicine (Bos taurus indicus; Brahman) breed and their reciprocal crosses. Results In total 120 samples were analysed from a pure taurine breed, an indicine breed and their reciprocal cross fetuses, which identified 6456 differentially expressed genes (DEGs) between the two pure breeds in at least one fetal tissue of which 110 genes were differentially expressed in all five tissues examined. DEGs shared across tissues were enriched for pathways related to immune and stress response functions. Only the liver had a substantial number of DEGs when reciprocal crossed were compared among which 310 DEGs were found to be in common with DEGs identified between purebred livers; these DEGs were significantly enriched for metabolic process GO terms. Analysis of DEGs across purebred and crossbred tissues suggested an additive expression pattern for most genes, where both paternal and maternal alleles contributed to variation in gene expression levels. However, expression of 5% of DEGs in each tissue was consistent with parent of origin effects, with both paternal and maternal dominance effects identified. Conclusions These data identify candidate genes potentially driving the tissue-specific differences between these taurine and indicine breeds and provide a biological insight into parental genome effects underlying phenotypic differences in bovine fetal development. Supplementary Information The online version contains supplementary material available at 10.1186/s12864-021-07667-2.
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Affiliation(s)
- Ruijie Liu
- Davies Research Centre, School of Animal and Veterinary Sciences, The University of Adelaide, Adelaide, Australia
| | - Rick Tearle
- Davies Research Centre, School of Animal and Veterinary Sciences, The University of Adelaide, Adelaide, Australia
| | - Wai Yee Low
- Davies Research Centre, School of Animal and Veterinary Sciences, The University of Adelaide, Adelaide, Australia
| | - Tong Chen
- Davies Research Centre, School of Animal and Veterinary Sciences, The University of Adelaide, Adelaide, Australia
| | - Dana Thomsen
- Davies Research Centre, School of Animal and Veterinary Sciences, The University of Adelaide, Adelaide, Australia.,Robinson Research Institute, The University of Adelaide, Adelaide, Australia
| | - Timothy P L Smith
- USMARC, USDA-ARS-US Meat Animal Research Center, Clay Center, NE, USA
| | - Stefan Hiendleder
- Davies Research Centre, School of Animal and Veterinary Sciences, The University of Adelaide, Adelaide, Australia.,Robinson Research Institute, The University of Adelaide, Adelaide, Australia
| | - John L Williams
- Davies Research Centre, School of Animal and Veterinary Sciences, The University of Adelaide, Adelaide, Australia. .,Present address: Dipartimento di Scienze Animali, della Nutrizione e degli Alimenti, Università Cattolica del Sacro Cuore, Piacenza, Italy.
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13
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Ye M, Yang ZY, Zhang Y, Xing YX, Xie QG, Zhou JH, Wang L, Xie W, Kee K, Chian RC. Single-cell multiomic analysis of in vivo and in vitro matured human oocytes. Hum Reprod 2021; 35:886-900. [PMID: 32325493 DOI: 10.1093/humrep/deaa044] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2019] [Revised: 02/03/2020] [Indexed: 12/11/2022] Open
Abstract
STUDY QUESTION Are there any differences between in vivo (IVV) and in vitro (IVT) matured metaphase II (MII) oocytes at the molecular level? SUMMARY ANSWER Between IVV and IVT oocytes, 507 differentially expressed genes (DEGs) were identified; the non-CpG methylomes were significantly different, but the CpG methylomes and genomic copy number variations (CNVs) were similar. WHAT IS KNOWN ALREADY A previous study using microarray and single-cell RNA-seq analysis revealed that numerous genes were differentially expressed between IVV and IVT oocytes. Independent studies of DNA methylation profiling in human oocytes have revealed negative correlations between gene transcription and the DNA methylation level at gene promoter regions. No study has compared global CpG or non-CpG methylation between these two groups of oocytes. Although a high level of aneuploidy has been reported in MII oocytes, no direct comparison of IVV and IVT oocytes based on single-cell sequencing data has been performed. STUDY DESIGN, SIZE, DURATION We collected eight IVV oocytes from six patients and seven IVT oocytes from seven patients and then analysed each oocyte using the previously established single-cell triple omics sequencing (scTrioseq) analysis to determine associations among the transcriptome, DNA methylome and chromosome ploidy in the oocytes. PARTICIPANTS/MATERIALS, SETTING, METHODS All IVV oocytes were donated by patients who received 150 IU gonadotropin per day from the third day of their menstrual cycle, followed by GnRH antagonist after 5 days of gonadotropin stimulation. All IVT oocytes were from immature oocytes which were donated by volunteers undergoing delivery by caesarean section then cultured in oocyte maturation medium containing 75 mIU/ml hMG for 24 to 48 h. Every single oocyte was analysed using the previously established single-cell multiomic sequencing analysis. MAIN RESULTS AND THE ROLE OF CHANCE There were 507 genes differentially expressed between the IVV (n = 8) and IVT (n = 7) oocytes, even though their global transcriptome profiles were similar. The enriched genes in IVV oocytes were related to the cell cycle process while those in IVT oocytes were related to mitochondrial respiration biogenesis. Although the global CpG methylation of the two groups of oocytes was similar, the non-CpG methylation level in IVV oocytes was higher than that in IVT oocytes. A high aneuploidy ratio was found in both groups, but the aneuploidy did not affect transcription according to the correlation analysis. LARGE-SCALE DATA N/A. LIMITATIONS AND REASONS FOR CAUTION Due to the difficulty in collecting MII oocytes, especially IVV matured oocytes, the sample size was limited. WIDER IMPLICATIONS OF THE FINDINGS Our findings indicate that single-cell multiomic sequencing can be utilised to examine the similarity and differences between IVV and IVT matured MII oocytes. STUDY FUNDING/COMPETING INTEREST(S) This work was supported by the Ministry of Science and Technology of China, National Key R&D Program of China (No. 2017YFC1001601). The donated oocytes were collected by Shanghai Tenth People's Hospital. The authors declare no competing interests.
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Affiliation(s)
- Min Ye
- Center for Stem Cell Biology and Regenerative Medicine, Department of Basic Medical Sciences, School of Medicine, Tsinghua University, Beijing, 100084, P. R. of China
| | - Zhi-Yong Yang
- Center for Reproductive Medicine, Shanghai Tenth People's Hospital of Tongji University, Shanghai, 200072, P. R. of China.,Tongji University School of Medicine, Shanghai, 200092, P. R. of China
| | - Yu Zhang
- Center for Stem Cell Biology and Regenerative Medicine, Department of Basic Medical Sciences, School of Medicine, Tsinghua University, Beijing, 100084, P. R. of China.,MOE Key Laboratory of Bioinformatics, School of Life Sciences, THU-PKU Center for Life Science, Tsinghua University, Beijing 100084, China
| | - Ya-Xin Xing
- Center for Reproductive Medicine, Shanghai Tenth People's Hospital of Tongji University, Shanghai, 200072, P. R. of China
| | - Qi-Gui Xie
- Center for Reproductive Medicine, Shanghai Tenth People's Hospital of Tongji University, Shanghai, 200072, P. R. of China
| | - Jian-Hong Zhou
- Center for Reproductive Medicine, Shanghai Tenth People's Hospital of Tongji University, Shanghai, 200072, P. R. of China
| | - Ling Wang
- Center for Reproductive Medicine, Shanghai Tenth People's Hospital of Tongji University, Shanghai, 200072, P. R. of China
| | - Wei Xie
- Center for Stem Cell Biology and Regenerative Medicine, Department of Basic Medical Sciences, School of Medicine, Tsinghua University, Beijing, 100084, P. R. of China.,MOE Key Laboratory of Bioinformatics, School of Life Sciences, THU-PKU Center for Life Science, Tsinghua University, Beijing 100084, China
| | - KehKooi Kee
- Center for Stem Cell Biology and Regenerative Medicine, Department of Basic Medical Sciences, School of Medicine, Tsinghua University, Beijing, 100084, P. R. of China
| | - Ri-Cheng Chian
- Center for Reproductive Medicine, Shanghai Tenth People's Hospital of Tongji University, Shanghai, 200072, P. R. of China
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14
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Abstract
Embryonic stem cells (ESCs) and induced pluripotent stem cells have the potential to differentiate to all cell types of an adult individual and are useful for studying development and for translational research. However, extrapolation of mouse and human ESC knowledge to deriving stable ESC lines of domestic ungulates and large livestock species has been challenging. In contrast to ESCs that are usually established from the blastocyst, mouse expanded potential stem cells (EPSCs) are derived from four-cell and eight-cell embryos. We have recently used the EPSC approach and established stem cells from porcine and human preimplantation embryos. EPSCs are molecularly similar across species and have broader developmental potential to generate embryonic and extraembryonic cell lineages. We further explore the EPSC technology for mammalian species refractory to the standard ESC approaches and report here the successful establishment of bovine EPSCs (bEPSCs) from preimplantation embryos of both wild-type and somatic cell nuclear transfer. bEPSCs express high levels of pluripotency genes, propagate robustly in feeder-free culture, and are genetically stable in long-term culture. bEPSCs have enriched transcriptomic features of early preimplantation embryos and differentiate in vitro to cells of the three somatic germ layers and, in chimeras, contribute to both the embryonic (fetal) and extraembryonic cell lineages. Importantly, precise gene editing is efficiently achieved in bEPSCs, and genetically modified bEPSCs can be used as donors in somatic cell nuclear transfer. bEPSCs therefore hold the potential to substantially advance biotechnology and agriculture.
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15
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Aguila L, Suzuki J, Hill ABT, García M, de Mattos K, Therrien J, Smith LC. Dysregulated Gene Expression of Imprinted and X-Linked Genes: A Link to Poor Development of Bovine Haploid Androgenetic Embryos. Front Cell Dev Biol 2021; 9:640712. [PMID: 33869192 PMCID: PMC8044962 DOI: 10.3389/fcell.2021.640712] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2020] [Accepted: 02/25/2021] [Indexed: 11/13/2022] Open
Abstract
Mammalian uniparental embryos are efficient models for genome imprinting research and allow studies on the contribution of the paternal and maternal genomes to early embryonic development. In this study, we analyzed different methods for production of bovine haploid androgenetic embryos (hAE) to elucidate the causes behind their poor developmental potential. Results indicate that hAE can be efficiently generated by using intracytoplasmic sperm injection and oocyte enucleation at telophase II. Although androgenetic haploidy does not disturb early development up to around the 8-cell stage, androgenetic development is disturbed after the time of zygote genome activation and hAE that reach the morula stage are less capable to reach the blastocyst stage of development. Karyotypic comparisons to parthenogenetic- and ICSI-derived embryos excluded chromosomal segregation errors as causes of the developmental constraints of hAE. However, analysis of gene expression indicated abnormal levels of transcripts for key long non-coding RNAs involved in X chromosome inactivation and genomic imprinting of the KCNQ1 locus, suggesting an association with X chromosome and some imprinted loci. Moreover, transcript levels of methyltransferase 3B were significantly downregulated, suggesting potential anomalies in hAE establishing de novo methylation. Finally, the methylation status of imprinted control regions for XIST and KCNQ1OT1 genes remained hypomethylated in hAE at the morula and blastocyst stages, confirming their origin from spermatozoa. Thus, our results exclude micromanipulation and chromosomal abnormalities as major factors disturbing the normal development of bovine haploid androgenotes. In addition, although the cause of the arrest remains unclear, we have shown that the inefficient development of haploid androgenetic bovine embryos to develop to the blastocyst stage is associated with abnormal expression of key factors involved in X chromosome activity and genomic imprinting.
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Affiliation(s)
| | | | | | | | | | | | - Lawrence C. Smith
- Département de Biomédecine Vétérinaire, Centre de Recherche en Reproduction Et Fertilité, Université de Montreal, Saint-Hyacinthe, QC, Canada
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16
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Folic acid supplementation during oocytes maturation influences in vitro production and gene expression of bovine embryos. ZYGOTE 2021; 29:342-349. [PMID: 33685547 DOI: 10.1017/s0967199421000022] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Embryos that are produced in vitro frequently present epigenetic modifications. However, maternal supplementation with folic acid (FA) may improve oocyte maturation and embryo development, preventing epigenetic errors in the offspring. We sought to evaluate the influence of FA supplementation during in vitro maturation of grade I (GI) and grade III (GIII) bovine oocytes on embryo production rate and the expression of IGF2 and KCNQ1OT1 genes. The oocytes were matured in vitro with different concentrations of FA (0, 10, 30 and 100 μM), followed by in vitro fertilization and embryo culture. On the seventh day (D7) of culture, embryo production was evaluated and gene expression was measured using real-time qPCR. Supplementation with 10 μM of FA did not affect embryo production for GI and GIII oocytes. Moderate supplementation (30 μM) seemed to be a positive influence, increasing embryo production for GIII (P = 0.012), while the highest dose (100 μM) reduced embryo production (P = 0.010) for GI, and IGF2 expression was not detected. In GIII, only embryos whose oocyte maturation was not supplemented with FA demonstrated detected IGF2 expression. The lowest concentration of FA (10 μM) reduced KCNQ1OT1 expression (P = 0.05) on embryos from GIII oocytes. Different FA concentrations induced different effects on bovine embryo production and gene expression that was related to oocyte quality. Despite the epigenetic effects of FA, supplementation seems to be a promising factor to improve bovine embryo production if used carefully, as concentration is an important factor, especially in oocytes with impaired quality.
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17
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Bezerra FTG, Dau AMP, Van Den Hurk R, Silva JRV. Molecular characteristics of oocytes and somatic cells of follicles at different sizes that influence in vitro oocyte maturation and embryo production. Domest Anim Endocrinol 2021; 74:106485. [PMID: 32858464 DOI: 10.1016/j.domaniend.2020.106485] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/15/2019] [Revised: 04/11/2020] [Accepted: 04/14/2020] [Indexed: 11/18/2022]
Abstract
During the last 10 to 15 yr, in vitro research to predict antral follicle growth and oocyte maturation has delivered interesting advances in the knowledge of processes regulating follicle growth and developmental competence of oocytes. This review discusses the contribution of cumulus and mural granulosa cells in the process of oocyte maturation and cumulus expansion in cumulus-oocyte complexes (COCs) from follicles of different sizes and shows that differences in gene expression in oocytes, granulosa, and theca cells of small and large follicles impact the success of in vitro blastocyst development. In addition, the molecular mechanisms by which COC metabolism and antioxidant defense provide oocyte competence are highlighted. Furthermore, new insights and perspectives on molecular and cellular regulation of in vitro oocyte maturation are emphasized.
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Affiliation(s)
- F T G Bezerra
- Laboratory of Biotechnology and Physiology of Reproduction (LABIREP), Graduation School of Biotechnology, Federal University of Ceara, Campus of Sobral, Sobral, Ceará, Brazil
| | - A M P Dau
- Federal Institute of Education, Science and Technology of Rio Grande do Sul, Rolante, Rio Grande do Sul, Brazil
| | - R Van Den Hurk
- Department of Pathobiology, Faculty of Veterinary Medicine, Utrecht University, Utrecht, the Netherlands
| | - J R V Silva
- Laboratory of Biotechnology and Physiology of Reproduction (LABIREP), Graduation School of Biotechnology, Federal University of Ceara, Campus of Sobral, Sobral, Ceará, Brazil.
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18
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Muhammad T, Wan Y, Sha Q, Wang J, Huang T, Cao Y, Li M, Yu X, Yin Y, Chan WY, Chen ZJ, You L, Lu G, Liu H. IGF2 improves the developmental competency and meiotic structure of oocytes from aged mice. Aging (Albany NY) 2020; 13:2118-2134. [PMID: 33318299 PMCID: PMC7880328 DOI: 10.18632/aging.202214] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2020] [Accepted: 10/22/2020] [Indexed: 12/11/2022]
Abstract
Advanced maternal-age is a major factor adversely affecting oocyte quality, consequently worsening pregnancy outcomes. Thus, developing strategies to reduce the developmental defects associated with advanced maternal-age would benefit older mothers. Multiple growth factors involved in female fertility have been extensively studied; however, the age-related impacts of various growth factors remain poorly studied. In the present study, we identified that levels of insulin-like growth factor 2 (IGF2) are significantly reduced in the serum and oocytes of aged mice. We found that adding IGF2 in culture medium promotes oocyte maturation and significantly increases the proportion of blastocysts: from 41% in the untreated control group to 64% (50 nM IGF2) in aged mice (p < 0.05). Additionally, IGF2 supplementation of the culture medium reduced reactive oxygen species production and the incidence of spindle/chromosome defects. IGF2 increases mitochondrial functional activity in oocytes from aged mice: we detected increased ATP levels, elevated fluorescence intensity of mitochondria, higher mitochondrial membrane potentials, and increased overall protein synthesis, as well as increased autophagy activity and decreased apoptosis. Collectively, our findings demonstrate that IGF2 supplementation in culture media improves oocyte developmental competence and reduces meiotic structure defects in oocytes from aged mice.
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Affiliation(s)
- Tahir Muhammad
- Center for Reproductive Medicine, Cheeloo College of Medicine, Shandong University, Jinan 250012, Shandong, China.,Key Laboratory of Reproductive Endocrinology of Ministry of Education, Shandong University, Jinan 250012, Shandong, China.,Shandong Key Laboratory of Reproductive Medicine, Jinan 250012, Shandong, China.,Shandong Provincial Clinical Research Center for Reproductive Health, Jinan 250012, Shandong, China.,National Research Center for Assisted Reproductive Technology and Reproductive Genetics, Shandong University, Jinan 250012, Shandong, China
| | - Yanling Wan
- Center for Reproductive Medicine, Cheeloo College of Medicine, Shandong University, Jinan 250012, Shandong, China.,Key Laboratory of Reproductive Endocrinology of Ministry of Education, Shandong University, Jinan 250012, Shandong, China.,Shandong Key Laboratory of Reproductive Medicine, Jinan 250012, Shandong, China.,Shandong Provincial Clinical Research Center for Reproductive Health, Jinan 250012, Shandong, China.,National Research Center for Assisted Reproductive Technology and Reproductive Genetics, Shandong University, Jinan 250012, Shandong, China
| | - Qianqian Sha
- Fertility Preservation Laboratory, Reproductive Medicine Center, Guangdong Second Provincial General Hospital, Guangzhou 510317, China
| | - Jianfeng Wang
- Center for Reproductive Medicine, Cheeloo College of Medicine, Shandong University, Jinan 250012, Shandong, China.,Key Laboratory of Reproductive Endocrinology of Ministry of Education, Shandong University, Jinan 250012, Shandong, China.,Shandong Key Laboratory of Reproductive Medicine, Jinan 250012, Shandong, China.,Shandong Provincial Clinical Research Center for Reproductive Health, Jinan 250012, Shandong, China.,National Research Center for Assisted Reproductive Technology and Reproductive Genetics, Shandong University, Jinan 250012, Shandong, China
| | - Tao Huang
- Center for Reproductive Medicine, Cheeloo College of Medicine, Shandong University, Jinan 250012, Shandong, China.,Key Laboratory of Reproductive Endocrinology of Ministry of Education, Shandong University, Jinan 250012, Shandong, China.,Shandong Key Laboratory of Reproductive Medicine, Jinan 250012, Shandong, China.,Shandong Provincial Clinical Research Center for Reproductive Health, Jinan 250012, Shandong, China.,National Research Center for Assisted Reproductive Technology and Reproductive Genetics, Shandong University, Jinan 250012, Shandong, China
| | - Yongzhi Cao
- Center for Reproductive Medicine, Cheeloo College of Medicine, Shandong University, Jinan 250012, Shandong, China.,Key Laboratory of Reproductive Endocrinology of Ministry of Education, Shandong University, Jinan 250012, Shandong, China.,Shandong Key Laboratory of Reproductive Medicine, Jinan 250012, Shandong, China.,Shandong Provincial Clinical Research Center for Reproductive Health, Jinan 250012, Shandong, China.,National Research Center for Assisted Reproductive Technology and Reproductive Genetics, Shandong University, Jinan 250012, Shandong, China
| | - Mengjing Li
- Center for Reproductive Medicine, Cheeloo College of Medicine, Shandong University, Jinan 250012, Shandong, China.,Key Laboratory of Reproductive Endocrinology of Ministry of Education, Shandong University, Jinan 250012, Shandong, China.,Shandong Key Laboratory of Reproductive Medicine, Jinan 250012, Shandong, China.,Shandong Provincial Clinical Research Center for Reproductive Health, Jinan 250012, Shandong, China.,National Research Center for Assisted Reproductive Technology and Reproductive Genetics, Shandong University, Jinan 250012, Shandong, China
| | - Xiaochen Yu
- Center for Reproductive Medicine, Cheeloo College of Medicine, Shandong University, Jinan 250012, Shandong, China.,Key Laboratory of Reproductive Endocrinology of Ministry of Education, Shandong University, Jinan 250012, Shandong, China.,Shandong Key Laboratory of Reproductive Medicine, Jinan 250012, Shandong, China.,Shandong Provincial Clinical Research Center for Reproductive Health, Jinan 250012, Shandong, China.,National Research Center for Assisted Reproductive Technology and Reproductive Genetics, Shandong University, Jinan 250012, Shandong, China
| | - Yingying Yin
- Center for Reproductive Medicine, Cheeloo College of Medicine, Shandong University, Jinan 250012, Shandong, China.,Key Laboratory of Reproductive Endocrinology of Ministry of Education, Shandong University, Jinan 250012, Shandong, China.,Shandong Key Laboratory of Reproductive Medicine, Jinan 250012, Shandong, China.,Shandong Provincial Clinical Research Center for Reproductive Health, Jinan 250012, Shandong, China.,National Research Center for Assisted Reproductive Technology and Reproductive Genetics, Shandong University, Jinan 250012, Shandong, China
| | - Wai Yee Chan
- National Research Center for Assisted Reproductive Technology and Reproductive Genetics, Shandong University, Jinan 250012, Shandong, China.,CUHK-SDU Joint Laboratory on Reproductive Genetics, School of Biomedical Sciences, The Chinese University of Hong Kong, Hong Kong 999077, China
| | - Zi-Jiang Chen
- Center for Reproductive Medicine, Cheeloo College of Medicine, Shandong University, Jinan 250012, Shandong, China.,Key Laboratory of Reproductive Endocrinology of Ministry of Education, Shandong University, Jinan 250012, Shandong, China.,Shandong Key Laboratory of Reproductive Medicine, Jinan 250012, Shandong, China.,Shandong Provincial Clinical Research Center for Reproductive Health, Jinan 250012, Shandong, China.,National Research Center for Assisted Reproductive Technology and Reproductive Genetics, Shandong University, Jinan 250012, Shandong, China.,Shanghai Key Laboratory for Assisted Reproduction and Reproductive Genetics, Shanghai 200000, China.,Center for Reproductive Medicine, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai 200135, China
| | - Li You
- Center for Reproductive Medicine, Cheeloo College of Medicine, Shandong University, Jinan 250012, Shandong, China.,Key Laboratory of Reproductive Endocrinology of Ministry of Education, Shandong University, Jinan 250012, Shandong, China.,Shandong Key Laboratory of Reproductive Medicine, Jinan 250012, Shandong, China.,Shandong Provincial Clinical Research Center for Reproductive Health, Jinan 250012, Shandong, China.,National Research Center for Assisted Reproductive Technology and Reproductive Genetics, Shandong University, Jinan 250012, Shandong, China
| | - Gang Lu
- National Research Center for Assisted Reproductive Technology and Reproductive Genetics, Shandong University, Jinan 250012, Shandong, China.,CUHK-SDU Joint Laboratory on Reproductive Genetics, School of Biomedical Sciences, The Chinese University of Hong Kong, Hong Kong 999077, China
| | - Hongbin Liu
- Center for Reproductive Medicine, Cheeloo College of Medicine, Shandong University, Jinan 250012, Shandong, China.,Key Laboratory of Reproductive Endocrinology of Ministry of Education, Shandong University, Jinan 250012, Shandong, China.,Shandong Key Laboratory of Reproductive Medicine, Jinan 250012, Shandong, China.,Shandong Provincial Clinical Research Center for Reproductive Health, Jinan 250012, Shandong, China.,National Research Center for Assisted Reproductive Technology and Reproductive Genetics, Shandong University, Jinan 250012, Shandong, China.,CUHK-SDU Joint Laboratory on Reproductive Genetics, School of Biomedical Sciences, The Chinese University of Hong Kong, Hong Kong 999077, China
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19
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Lu T, Zou X, Liu G, Deng M, Sun B, Guo Y, Liu D, Li Y. A Preliminary Study on the Characteristics of microRNAs in Ovarian Stroma and Follicles of Chuanzhong Black Goat during Estrus. Genes (Basel) 2020; 11:genes11090970. [PMID: 32825655 PMCID: PMC7564575 DOI: 10.3390/genes11090970] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2020] [Revised: 08/16/2020] [Accepted: 08/19/2020] [Indexed: 02/08/2023] Open
Abstract
microRNAs (miRNAs) play a significant role in ovarian follicular maturity, but miRNA expression patterns in ovarian stroma (OS), large follicles (LF), and small follicles (SF) have been rarely explored. We herein aimed to identify miRNAs, their target genes and signaling pathways, as well as their interaction networks in OS, LF, and SF of Chuanzhong black goats at the estrus phase using small RNA-sequencing. We found that the miRNA expression profiles of LF and SF were more similar than those of OS—32, 16, and 29 differentially expressed miRNAs were identified in OS vs. LF, OS vs. SF, and LF vs. SF, respectively. Analyses of functional enrichment and the miRNA-targeted gene interaction network suggested that miR-182 (SMC3), miR-122 (SGO1), and miR-206 (AURKA) were involved in ovarian organogenesis and hormone secretion by oocyte meiosis. Furthermore, miR-202-5p (EREG) and miR-485-3p (FLT3) were involved in follicular maturation through the MAPK signaling pathway, and miR-2404 (BMP7 and CDKN1C) played a key role in follicular development through the TGF-β signaling pathway and cell cycle; nevertheless, further research is warranted. To our knowledge, this is the first study to investigate miRNA expression patterns in OS, LF, and SF of Chuanzhong black goats during estrus. Our findings provide a theoretical basis to elucidate the role of miRNAs in follicular maturation. These key miRNAs might provide candidate biomarkers for the diagnosis of follicular maturation and will assist in developing new therapeutic targets for female goat infertility.
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Affiliation(s)
- Tingting Lu
- College of Animal Science, South China Agricultural University, Guangzhou 510642, China; (T.L.); (X.Z.); (G.L.); (M.D.); (B.S.); (Y.G.); (D.L.)
| | - Xian Zou
- College of Animal Science, South China Agricultural University, Guangzhou 510642, China; (T.L.); (X.Z.); (G.L.); (M.D.); (B.S.); (Y.G.); (D.L.)
- State Key Laboratory of Livestock and Poultry Breeding, Guangdong Key Laboratory of Animal Breeding and Nutrition, Institute of Animal Science, Guangdong Academy of Agricultural Sciences, Guangzhou 510640, China
| | - Guangbin Liu
- College of Animal Science, South China Agricultural University, Guangzhou 510642, China; (T.L.); (X.Z.); (G.L.); (M.D.); (B.S.); (Y.G.); (D.L.)
| | - Ming Deng
- College of Animal Science, South China Agricultural University, Guangzhou 510642, China; (T.L.); (X.Z.); (G.L.); (M.D.); (B.S.); (Y.G.); (D.L.)
| | - Baoli Sun
- College of Animal Science, South China Agricultural University, Guangzhou 510642, China; (T.L.); (X.Z.); (G.L.); (M.D.); (B.S.); (Y.G.); (D.L.)
| | - Yongqing Guo
- College of Animal Science, South China Agricultural University, Guangzhou 510642, China; (T.L.); (X.Z.); (G.L.); (M.D.); (B.S.); (Y.G.); (D.L.)
| | - Dewu Liu
- College of Animal Science, South China Agricultural University, Guangzhou 510642, China; (T.L.); (X.Z.); (G.L.); (M.D.); (B.S.); (Y.G.); (D.L.)
| | - Yaokun Li
- College of Animal Science, South China Agricultural University, Guangzhou 510642, China; (T.L.); (X.Z.); (G.L.); (M.D.); (B.S.); (Y.G.); (D.L.)
- Correspondence: ; Tel.: +86-1862-019-3682
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20
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Deng M, Zhang G, Cai Y, Liu Z, Zhang Y, Meng F, Wang F, Wan Y. DNA methylation dynamics during zygotic genome activation in goat. Theriogenology 2020; 156:144-154. [PMID: 32731098 DOI: 10.1016/j.theriogenology.2020.07.008] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2020] [Revised: 07/04/2020] [Accepted: 07/07/2020] [Indexed: 12/15/2022]
Abstract
DNA methylation is a crucial element in the epigenetic regulation of mammalian embryonic development. However, the subtle changes in DNA methylation differ in species, and, little information is known regarding the dynamics of DNA methylation at the single-base resolution in goat. In the present study, we studied the DNA methylation dynamics during goat zygotic genome activation (ZGA) at global and single-base resolution using immunostaining and reduced representation bisulfite sequencing, respectively. We showed that DNA methylation was decreased both at global and single-base resolution, and the expression of TET1 was increased while DNMT1 was decreased during ZGA in goat. We identified 51058 tiles of differential methylation regions (DMRs), which were enriched in the developmental process, the regulation of developmental process, AMPK signaling pathway, mTOR signaling pathway, autophagy, and lysosome, as revealed by GO and KEGG enrichment analysis. Furthermore, we found an association between the methylation level and the expression of imprinted genes (IGF2R, PEG3, and ZFP64), maternal genes (TRIM28, SETD1A, SIN3A, and NPM2), and zygotic genes (DUXA, IGF2BP1, WT1, and ZIM3), suggesting that DNA methylation is in the tight control of ZGA in goat by regulating the expression of the critical genes. Our data will help to understand the stochastic ZGA events to achieve better development of goat embryos in vitro and provide an excellent source for further ZGA studies.
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Affiliation(s)
- Mingtian Deng
- Jiangsu Livestock Embryo Engineering Laboratory, College of Animal Science and Technology, Nanjing Agricultural University, Nanjing, 210095, China
| | - Guomin Zhang
- College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, 210095, China
| | - Yu Cai
- Jiangsu Livestock Embryo Engineering Laboratory, College of Animal Science and Technology, Nanjing Agricultural University, Nanjing, 210095, China
| | - Zifei Liu
- Jiangsu Livestock Embryo Engineering Laboratory, College of Animal Science and Technology, Nanjing Agricultural University, Nanjing, 210095, China
| | - Yanli Zhang
- Jiangsu Livestock Embryo Engineering Laboratory, College of Animal Science and Technology, Nanjing Agricultural University, Nanjing, 210095, China
| | - Fanxing Meng
- National Experimental Teaching Demonstration Center of Animal Science, Nanjing Agricultural University, Nanjing, 210095, China
| | - Feng Wang
- Jiangsu Livestock Embryo Engineering Laboratory, College of Animal Science and Technology, Nanjing Agricultural University, Nanjing, 210095, China
| | - Yongjie Wan
- Jiangsu Livestock Embryo Engineering Laboratory, College of Animal Science and Technology, Nanjing Agricultural University, Nanjing, 210095, China.
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21
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Muhammad T, Li M, Wang J, Huang T, Zhao S, Zhao H, Liu H, Chen ZJ. Roles of insulin-like growth factor II in regulating female reproductive physiology. SCIENCE CHINA-LIFE SCIENCES 2020; 63:849-865. [PMID: 32291558 DOI: 10.1007/s11427-019-1646-y] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/22/2019] [Accepted: 03/12/2020] [Indexed: 12/20/2022]
Abstract
The number of growth factors involved in female fertility has been extensively studied, but reluctance to add essential growth factors in culture media has limited progress in optimizing embryonic growth and implantation outcomes, a situation that has ultimately led to reduced pregnancy outcomes. Insulin-like growth factor II (IGF-II) is the most intricately regulated of all known reproduction-related growth factors characterized to date, and is perhaps the predominant growth factor in human ovarian follicles. This review aims to concisely summarize what is known about the role of IGF-II in follicular development, oocyte maturation, embryonic development, implantation success, placentation, fetal growth, and in reducing placental cell apoptosis, as well as present strategies that use growth factors in culture systems to improve the developmental potential of oocytes and embryos in different species. Synthesizing the present knowledge about the physiological roles of IGF-II in follicular development, oocyte maturation, and early embryonic development should, on the one hand, deepen our overall understanding of the potential beneficial effects of growth factors in female reproduction and on the other hand support development (optimization) of improved outcomes for assisted reproductive technologies.
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Affiliation(s)
- Tahir Muhammad
- Center for Reproductive Medicine, Cheeloo College of Medicine, Shandong University, Jinan, 250012, China.,National Research Center for Assisted Reproductive Technology and Reproductive Genetics, Shandong University, Jinan, 250012, China.,Key laboratory of Reproductive Endocrinology of Ministry of Education, Shandong University, Jinan, 250012, China.,Shandong Provincial Clinical Medicine Research Center for Reproductive Health, Shandong University, Jinan, 250012, China
| | - Mengjing Li
- Center for Reproductive Medicine, Cheeloo College of Medicine, Shandong University, Jinan, 250012, China.,National Research Center for Assisted Reproductive Technology and Reproductive Genetics, Shandong University, Jinan, 250012, China.,Key laboratory of Reproductive Endocrinology of Ministry of Education, Shandong University, Jinan, 250012, China.,Shandong Provincial Clinical Medicine Research Center for Reproductive Health, Shandong University, Jinan, 250012, China
| | - Jianfeng Wang
- Center for Reproductive Medicine, Cheeloo College of Medicine, Shandong University, Jinan, 250012, China.,National Research Center for Assisted Reproductive Technology and Reproductive Genetics, Shandong University, Jinan, 250012, China.,Key laboratory of Reproductive Endocrinology of Ministry of Education, Shandong University, Jinan, 250012, China.,Shandong Provincial Clinical Medicine Research Center for Reproductive Health, Shandong University, Jinan, 250012, China
| | - Tao Huang
- Center for Reproductive Medicine, Cheeloo College of Medicine, Shandong University, Jinan, 250012, China.,National Research Center for Assisted Reproductive Technology and Reproductive Genetics, Shandong University, Jinan, 250012, China.,Key laboratory of Reproductive Endocrinology of Ministry of Education, Shandong University, Jinan, 250012, China.,Shandong Provincial Clinical Medicine Research Center for Reproductive Health, Shandong University, Jinan, 250012, China
| | - Shigang Zhao
- Center for Reproductive Medicine, Cheeloo College of Medicine, Shandong University, Jinan, 250012, China.,National Research Center for Assisted Reproductive Technology and Reproductive Genetics, Shandong University, Jinan, 250012, China.,Key laboratory of Reproductive Endocrinology of Ministry of Education, Shandong University, Jinan, 250012, China.,Shandong Provincial Clinical Medicine Research Center for Reproductive Health, Shandong University, Jinan, 250012, China
| | - Han Zhao
- Center for Reproductive Medicine, Cheeloo College of Medicine, Shandong University, Jinan, 250012, China.,National Research Center for Assisted Reproductive Technology and Reproductive Genetics, Shandong University, Jinan, 250012, China.,Key laboratory of Reproductive Endocrinology of Ministry of Education, Shandong University, Jinan, 250012, China.,Shandong Provincial Clinical Medicine Research Center for Reproductive Health, Shandong University, Jinan, 250012, China
| | - Hongbin Liu
- Center for Reproductive Medicine, Cheeloo College of Medicine, Shandong University, Jinan, 250012, China. .,National Research Center for Assisted Reproductive Technology and Reproductive Genetics, Shandong University, Jinan, 250012, China. .,Key laboratory of Reproductive Endocrinology of Ministry of Education, Shandong University, Jinan, 250012, China. .,Shandong Provincial Clinical Medicine Research Center for Reproductive Health, Shandong University, Jinan, 250012, China.
| | - Zi-Jiang Chen
- Center for Reproductive Medicine, Cheeloo College of Medicine, Shandong University, Jinan, 250012, China. .,National Research Center for Assisted Reproductive Technology and Reproductive Genetics, Shandong University, Jinan, 250012, China. .,Key laboratory of Reproductive Endocrinology of Ministry of Education, Shandong University, Jinan, 250012, China. .,Shandong Provincial Clinical Medicine Research Center for Reproductive Health, Shandong University, Jinan, 250012, China. .,Shanghai Key Laboratory for Assisted Reproduction and Reproductive Genetics, Shanghai, 200000, China. .,Center for Reproductive Medicine, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, 200000, China.
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22
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Santana PDPB, da Silva ALDC, Ramos RTJ, Gonçalves AA, da Costa NN, Ramos PDCA, Silva TVG, Cordeiro MDS, Santos SDSD, Ohashi OM, Miranda MDS. Contributions of RNA-seq to improve in vitro embryo production (IVP). Anim Reprod 2019; 16:249-259. [PMID: 33224284 PMCID: PMC7673591 DOI: 10.21451/1984-3143-ar2017-0043] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
In Vitro Embryo Production (IVP) is widely used to improve the reproductive efficiency of livestock animals, however increasing the embryo development rates and pregnancy outcomes is still a challenge for some species. Thus, the lack of biological knowledge hinders developing specie-specific IVP protocols. Therefore, the contributions of RNA-seq to generate relevant biological knowledge and improve the efficiency of IVP in livestock animals are reviewed herein.
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Affiliation(s)
| | | | | | - Arnaldo Algaranhar Gonçalves
- Laboratory of In Vitro Fertilization, Institute of Biological Science, Federal University of Pará, Belém, PA, Brazil
| | - Nathalia Nogueira da Costa
- Laboratory of In Vitro Fertilization, Institute of Biological Science, Federal University of Pará, Belém, PA, Brazil
| | | | | | - Marcela da Silva Cordeiro
- Laboratory of In Vitro Fertilization, Institute of Biological Science, Federal University of Pará, Belém, PA, Brazil
| | | | - Otávio Mitio Ohashi
- Laboratory of In Vitro Fertilization, Institute of Biological Science, Federal University of Pará, Belém, PA, Brazil
| | - Moysés Dos Santos Miranda
- Laboratory of In Vitro Fertilization, Institute of Biological Science, Federal University of Pará, Belém, PA, Brazil
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23
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Jiang Z, Lin J, Dong H, Zheng X, Marjani SL, Duan J, Ouyang Z, Chen J, Tian XC. DNA methylomes of bovine gametes and in vivo produced preimplantation embryos. Biol Reprod 2019; 99:949-959. [PMID: 29912291 DOI: 10.1093/biolre/ioy138] [Citation(s) in RCA: 41] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2018] [Accepted: 06/12/2018] [Indexed: 12/13/2022] Open
Abstract
DNA methylation is an important epigenetic modification that undergoes dynamic changes in mammalian embryogenesis, during which both parental genomes are reprogrammed. Despite the many immunostaining studies that have assessed global methylation, the gene-specific DNA methylation patterns in bovine preimplantation embryos are unknown. Using reduced representation bisulfite sequencing, we determined genome-scale DNA methylation of bovine sperm and individual in vivo developed oocytes and preimplantation embryos. We show that (1) the major wave of genome-wide demethylation was completed by the 8-cell stage; (2) promoter methylation was significantly and inversely correlated with gene expression at the 8-cell and blastocyst stages; (3) sperm and oocytes have numerous differentially methylated regions (DMRs)-DMRs specific for sperm were strongly enriched in long terminal repeats and rapidly lost methylation in embryos; while the oocyte-specific DMRs were more frequently localized in exons and CpG islands (CGIs) and demethylated gradually across cleavage stages; (4) DMRs were also found between in vivo and in vitro matured oocytes; and (5) differential methylation between bovine gametes was confirmed in some but not all known imprinted genes. Our data provide insights into the complex epigenetic reprogramming of bovine early embryos, which serve as an important model for human preimplantation development.
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Affiliation(s)
- Zongliang Jiang
- School of Animal Sciences, Louisiana State University Agricultural Center, Baton Rouge, Louisiana, USA
| | - Jianan Lin
- The Jackson Laboratory for Genomic Medicine, Farmington, Connecticut, USA.,Department of Biomedical Engineering, University of Connecticut, Storrs, Connecticut, USA.,Department of Genetics and Genome Sciences and Institute for System Genomics, University of Connecticut Health Center, Farmington, Connecticut, USA
| | - Hong Dong
- Xinjiang Academy of Animal Science, Urumqi, Xinjiang, PR China
| | - Xinbao Zheng
- Xinjiang Academy of Animal Science, Urumqi, Xinjiang, PR China
| | - Sadie L Marjani
- Department of Biology, Central Connecticut State University, New Britain, Connecticut, USA
| | - Jingyue Duan
- Department of Animal Science, University of Connecticut, Storrs, Connecticut, USA
| | - Zhengqing Ouyang
- The Jackson Laboratory for Genomic Medicine, Farmington, Connecticut, USA.,Department of Biomedical Engineering, University of Connecticut, Storrs, Connecticut, USA.,Department of Genetics and Genome Sciences and Institute for System Genomics, University of Connecticut Health Center, Farmington, Connecticut, USA
| | - Jingbo Chen
- Xinjiang Academy of Animal Science, Urumqi, Xinjiang, PR China
| | - Xiuchun Cindy Tian
- Department of Animal Science, University of Connecticut, Storrs, Connecticut, USA
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24
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Wrenzycki C. Gene expression analysis and in vitro production procedures for bovine preimplantation embryos: Past highlights, present concepts and future prospects. Reprod Domest Anim 2018; 53 Suppl 2:14-19. [DOI: 10.1111/rda.13260] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2018] [Revised: 05/27/2018] [Accepted: 05/29/2018] [Indexed: 12/19/2022]
Affiliation(s)
- Christine Wrenzycki
- Chair for Molecular Reproductive Medicine; Clinic for Veterinary Obstetrics; Gynecology and Andrology of Large and Small Animals; Faculty of Veterinary Medicine; Justus-Liebig-University Giessen; Giessen Germany
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25
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Transcriptional profiles of crossbred embryos derived from yak oocytes in vitro fertilized with cattle sperm. Sci Rep 2018; 8:11571. [PMID: 30069024 PMCID: PMC6070518 DOI: 10.1038/s41598-018-29912-7] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2018] [Accepted: 07/20/2018] [Indexed: 12/24/2022] Open
Abstract
During mammalian pre-implantation embryonic development, dramatic and orchestrated changes occur in gene transcription. Pregnancy rates were low when yak females were crossbred with cattle breeds, but few studies exist to describe the unique molecular network regulation behind the pre-implantation development of these embryos. We determined the transcriptomes of crossbred embryos derived from yak oocytes in vitro fertilized with Jersey sperm using Illumina RNA-seq for the first time in this study. Embryos were sampled at the 2-, 4-, and 8-cell, morula and blastocyst stages. The results showed that in total, 291.9 million short reads were generated from the five libraries of 2-, 4-, and 8-cell, morula and blastocyst stages, with 276.2 million high-quality reads selected for further analysis. Eighty to 91% of the clean reads were aligned against the yak reference genome. A total of 19,072 transcripts were identified in five libraries, of which 7,785 transcripts were co-expressed in each stage and 2,013 transcripts were stage-specific. When a |log2 ratio| ≥1 and q-value ≤ 0.05 were set as thresholds for identifying differentially expressed genes (DEGs), we detected a total of 3,690 to 10,298 DEGs between any two consecutive stages. Based on the results of GO and KEGG enrichment, some of these DEGs potentially play an important role in regulating pre-implantation development, but they are most likely stage-specific. There were 2,960, 7,287, 6,420, 7,724 and 10,417 DEGs in 2-, 4-, 8-cell, morula and blastocyst stages between the crossbred embryos and purebred embryos of the yak, respectively, leading to a large difference in GO terms and pathways. In conclusion, we sequenced transcriptomes of in vitro-produced crossbred embryos of yak and cattle during pre-implantation and provided comprehensive examinations of gene activities. These will be helpful for development of assisted reproductive technology and better understanding the early maternal-fetal or maternal-embryonic dialog in inter-species crossbreeding.
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26
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Zi XD, Luo B, Xia W, Zheng YC, Xiong XR, Li J, Zhong JC, Zhu JJ, Zhang ZF. Characterization of transcriptional complexity during pre-implantation development of the yak (Bos grunniens) using RNA-Seq. Reprod Domest Anim 2018; 53:759-768. [PMID: 29582471 DOI: 10.1111/rda.13167] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2017] [Accepted: 02/13/2018] [Indexed: 12/18/2022]
Abstract
The objective of this study was to investigate the mechanism that regulates pre-implantation development of the yak (Bos grunniens). We determined the transcriptomes of in vitro-produced yak embryos at two-cell, four-cell, eight-cell stages, and morula and blastocyst using the Illumina RNA-seq for the first time. We obtained 47.36-50.86 million clean reads for each stage, of which, 85.65%-90.02% reads were covered in the reference genome. A total of 17,368 genes were expressed during the two-cell stage to blastocyst of the yak, of which 7,236 genes were co-expressed at all stages, whereas 10,132 genes were stage-specific expression. Transcripts from 9,827 to 14,893 different genes were detected in various developmental stages. When |log2 ratio| ≥ 1 and q-value <0.05 were set as thresholds for identifying differentially expressed genes (DEGs), we detected a total of 6,922-10,555 DEGs between any two consecutive stages. The GO distributions of these DEGs were classified into three categories: biological processes (23 terms), cellular components (22 terms) and molecular functions (22 terms). Pathway analysis revealed 310 pathways of the DEGs that were operative in early pre-implantation yak development, of which 32 were the significantly enriched pathways. In conclusion, this is the first report to investigate the mechanism that regulates yak embryonic development using high-throughput sequencing, which provides a comprehensive framework of transcriptome landscapes of yak pre-implantation embryos.
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Affiliation(s)
- X-D Zi
- Key-Laboratory for Animal Science of State Ethnic Affairs Commission, Southwest University for Nationalities, Chengdu, China
| | - B Luo
- Key-Laboratory for Animal Science of State Ethnic Affairs Commission, Southwest University for Nationalities, Chengdu, China
| | - W Xia
- Key-Laboratory for Animal Science of State Ethnic Affairs Commission, Southwest University for Nationalities, Chengdu, China
| | - Y-C Zheng
- Key-Laboratory for Modern Biotechnology of State Ethnic Affairs Commission, Southwest University for Nationalities, Chengdu, China
| | - X-R Xiong
- Key-Laboratory for Animal Science of State Ethnic Affairs Commission, Southwest University for Nationalities, Chengdu, China
| | - J Li
- Key-Laboratory for Animal Science of State Ethnic Affairs Commission, Southwest University for Nationalities, Chengdu, China
| | - J-C Zhong
- Institute of Qinghai-Tibetan Plateau, Southwest University for Nationalities, Chengdu, China
| | - J-J Zhu
- Institute of Qinghai-Tibetan Plateau, Southwest University for Nationalities, Chengdu, China
| | - Z-F Zhang
- Key-Laboratory for Animal Science of State Ethnic Affairs Commission, Southwest University for Nationalities, Chengdu, China
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27
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Stouffer RL, Woodruff TK. Nonhuman Primates: A Vital Model for Basic and Applied Research on Female Reproduction, Prenatal Development, and Women's Health. ILAR J 2017; 58:281-294. [PMID: 28985318 PMCID: PMC5886348 DOI: 10.1093/ilar/ilx027] [Citation(s) in RCA: 37] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2016] [Revised: 06/30/2017] [Indexed: 12/20/2022] Open
Abstract
The comparative biology of reproduction and development in mammalian species is remarkable. Hence, because of similarities in environmental and neuroendocrine control of the reproductive axis, the cyclic function of the ovary and reproductive tract, establishment and control of the maternal-fetal-placental unit during pregnancy, and reproductive aging from puberty through menopause, nonhuman primates (NHPs) are valuable models for research related to women's reproductive health and its disorders. This chapter provides examples of research over the past 10+ years using Old World monkeys (notably macaque species), baboons, and to a lesser extent New World monkeys (especially marmosets) that contributed to our understanding of the etiology and therapies or prevention of: (1) ovarian disorders, e.g., polycystic ovary syndrome, mitochondrial DNA-based diseases from the oocyte; (2) uterine disorders, for example, endometriosis and uterine transplantation; and (3) pregnancy disorders, for example, preterm labor and delivery, environmental factors. Also, emerging opportunities such as viral (e.g., Zika) induced fetal defects and germline genomic editing to generate valuable primate models of human diseases (e.g., Huntington and muscular dystrophy) are addressed. Although the high costs, specialized resources, and ethical debate challenge the use of primates in biomedical research, their inclusion in fertility and infertility research is vital for continued improvements in women's reproductive health.
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Affiliation(s)
- Richard L Stouffer
- Richard L. Stouffer, Ph.D., is Professor in the Division of Reproductive and Developmental Sciences at the Oregon National Primate Research Center in Beaverton, Oregon and Professor in the Department of Obstetrics and Gynecology at Oregon Health & Sciences University in Portland, Oregon. Teresa K. Woodruff, Ph.D., is Thomas J. Watkins Professor of Obstetrics and Gynecology, Vice Chair of Research (OB/GYN), and Chief of the Division of Reproductive Science in Medicine at the Feinberg School of Medicine, and Professor of Molecular Biosciences at Weinberg College of Arts and Sciences, Northwestern University in Chicago, Illinois.
| | - Teresa K Woodruff
- Richard L. Stouffer, Ph.D., is Professor in the Division of Reproductive and Developmental Sciences at the Oregon National Primate Research Center in Beaverton, Oregon and Professor in the Department of Obstetrics and Gynecology at Oregon Health & Sciences University in Portland, Oregon. Teresa K. Woodruff, Ph.D., is Thomas J. Watkins Professor of Obstetrics and Gynecology, Vice Chair of Research (OB/GYN), and Chief of the Division of Reproductive Science in Medicine at the Feinberg School of Medicine, and Professor of Molecular Biosciences at Weinberg College of Arts and Sciences, Northwestern University in Chicago, Illinois.
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28
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Expression of tissue-specific imprinted gene tumor Suppressing Subtransferable Candidate 4 (TSSC4) is altered in placentae produced by nuclear transfer in cattle. Anim Reprod Sci 2017; 187:174-180. [PMID: 29113726 DOI: 10.1016/j.anireprosci.2017.11.003] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2017] [Revised: 09/19/2017] [Accepted: 11/02/2017] [Indexed: 01/20/2023]
Abstract
Embryonic and placental development is highly orchestrated by epigenetic processes. Disruptions in normal placental development, commonly observed in pregnancies produced by nuclear transfer, are associated with abnormal gene expression and altered epigenetic regulation of imprinted and vital placental genes. The objective of this study was to evaluate expression and epigenetic regulation of the imprinted gene TSSC4 in cotyledonary and intercotyledonary tissues from day 60 pregnancies produced by embryo transfer (ET), in vitro fertilization (IVF) and nuclear transfer (NT) in cattle. TSSC4 expression was reduced by 30% in cotyledons at 60days of gestation in the NT group. The proximal promoter region of TSSC4 showed an increase in the permissive histone mark (H3K4me2) and a reduction in the inhibitory histone mark (H3K9me2) in the cotyledons produced by NT, in relation to cotyledons produced by embryo transfer. Interestingly, H3K9me2 was also significantly reduced in cotyledons produced by IVF, compared to the ET controls. DNA methylation, in CpG-rich regions located at the proximal promoter region and the coding region of TSSC4 did not differ. These results suggest that the reduction in TSSC4 expression, observed following NT, can not be explained by the histone changes investigated in the proximal promoter region of the gene, or by changes in methylation in three regions evaluated. Also, a decrease in the levels of H3K9 dimethylation in IVF samples, indicate that in vitro culturing could corroborate with the alterations seen in the NT group.
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Gibson C, de Ruijter-Villani M, Stout TAE. Negative uterine asynchrony retards early equine conceptus development and upregulation of placental imprinted genes. Placenta 2017; 57:175-182. [PMID: 28864009 DOI: 10.1016/j.placenta.2017.07.007] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/01/2017] [Revised: 06/30/2017] [Accepted: 07/10/2017] [Indexed: 10/19/2022]
Abstract
INTRODUCTION Placental imprinted genes appear to be sensitive indicators of an inappropriate pre-implantation environment. This study examined the effects of negative uterine asynchrony after embryo transfer (ET) on early horse embryo development, and yolk-sac membrane expression of DNA methyltransferases (DNMTs) and equine specific placental imprinted genes. METHODS Day 8 embryos were transferred to recipient mares on day 8 (synchronous) or day 3 (asynchronous) after ovulation, and conceptuses were recovered 6 or 11 days later (day 14 or 19 of development). RESULTS Day 14 conceptuses recovered from an asynchronous uterus had a smaller embryonic disc, in which primitive streak development was visibly retarded compared to conceptuses from a synchronous uterus. Similarly, length, somite number and organogenesis were retarded in day 19 embryos after asynchronous ET. Maternal (GRB10, H19, IGF2R, PHLDA2) and paternal (IGF2, INSR, PEG3, PEG10, DIO3, NDN, SNRPN) imprinted genes and DNMTs (DNMT1, 3A and 3B) were all up-regulated between day 14 and 19 of pregnancy and, for most, mRNA expression was higher in synchronous than asynchronous day 19 yolk-sac membrane. Expression of the paternally imprinted gene HAT1 increased between day 14 and 19 of pregnancy, but was not affected by the asynchrony. DISCUSSION Conceptus development and upregulation of DNMTs and imprinted genes were delayed rather than dysregulated after transfer into a negatively asynchronous uterus. We propose that this ability to 'reset' conceptus development to uterine stage is an adaptation that explains why horse embryos are unusually tolerant of asynchrony after ET.
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Affiliation(s)
- Charlotte Gibson
- Department of Equine Sciences, Faculty of Veterinary Medicine, Utrecht University, Yalelaan 114, 3584 CM Utrecht, The Netherlands.
| | - Marta de Ruijter-Villani
- Department of Equine Sciences, Faculty of Veterinary Medicine, Utrecht University, Yalelaan 114, 3584 CM Utrecht, The Netherlands.
| | - Tom A E Stout
- Department of Equine Sciences, Faculty of Veterinary Medicine, Utrecht University, Yalelaan 114, 3584 CM Utrecht, The Netherlands.
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O'Doherty AM, O'Shea LC, Sandra O, Lonergan P, Fair T, Forde N. Imprinted and DNA methyltransferase gene expression in the endometrium during the pre- and peri-implantation period in cattle. Reprod Fertil Dev 2017; 29:1729-1738. [DOI: 10.1071/rd16238] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2015] [Accepted: 08/24/2016] [Indexed: 12/14/2022] Open
Abstract
The endometrium plays a key role in providing an optimal environment for attachment of the preimplantation embryo during the early stages of pregnancy. Investigations over the past 2 decades have demonstrated that vital epigenetic processes occur in the embryo during the preimplantation stages of development. However, few studies have investigated the potential role of imprinted genes and their associated modulators, the DNA methyltransferases (DNMTs), in the bovine endometrium during the pre- and peri-implantation period. Therefore, in the present study we examined the expression profiles of the DNMT genes (3A, 3A2 and 3B) and a panel of the most comprehensively studied imprinted genes in the endometrium of cyclic and pregnant animals. Intercaruncular (Days 5, 7, 13, 16 and 20) and caruncular (Days 16 and 20) regions were analysed for gene expression changes, with protein analysis also performed for DNMT3A, DNMT3A2 and DNMT3B on Days 16 and 20. An overall effect of day was observed for expression of several of the imprinted genes. Tissue-dependent gene expression was detected for all genes at Day 20. Differences in DNMT protein abundance were mostly observed in the intercaruncular regions of pregnant heifers at Day 16 when DNMT3A, DNMT3A2 and DNMT3B were all lower when compared with cyclic controls. At Day 20, DNMT3A2 expression was lower in the pregnant caruncular samples compared with cyclic animals. This study provides evidence that epigenetic mechanisms in the endometrium may be involved with implantation of the embryo during the early stages of pregnancy in cattle.
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Shi JL, Luo W, Li Y, Yang C, Tang YP, Li KZ, Cao J. Screening differentially expressed genes in hepatocellular carcinoma by cross-species and cross-carcinogenic factors strategy based on RNA-Seq. Shijie Huaren Xiaohua Zazhi 2016; 24:1664-1675. [DOI: 10.11569/wcjd.v24.i11.1664] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
AIM: To identify key molecules involved in progression of hepatocellular carcinoma (HCC) by cross-species (human and tupaia) and cross-carcinogenic factors (HBV and AFB1) strategy based on RNA sequencing (RNA-Seq).
METHODS: The transcripts in human and tupaia HCC, tumor adjacent liver tissue (para-HCC) and normal liver tissue were thoroughly analyzed by RNA sequencing. Tupaia HCC was induced by HBV infection or aflatoxin B1 (AFB1). Differentially expressed genes were collected between these tissues, and common differential genes which cross human and Tupaia as well as HBV and AFB1 carcinogenic factors were identified.
RESULTS: Compared to human para-HCC and normal liver tissues, 68 differential genes were screened in human HCC, among which 14 were up-regulated and 54 down-regulated. Compared to Tupaia para-HCC and normal liver tissues, 314 differential genes were screened in HBV induced Tupaia HCC, and 20 were screened in AFB1 induced Tupaia HCC. There were 11 common differential genes between HBV and AFB1 induced Tupaia HCC, all of which were down-regulated. There were 2 common differential genes between human HCC and Tupaia HCC, and they were apolipoprotein F (APOF) and insulin-like growth factor binding protein, acid labile subunit (IGFALS), both of which were down-regulated in HCC.
CONCLUSION: The cross-species, cross-carcinogenic factors screening strategy based on RNA-Seq may promote the process of identifying key molecules for human HCC. APOF and IGFALS may be important factors for HCC.
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