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Yu K, Xiao K, Sun QQ, Liu RF, Huang LF, Zhang PF, Xu HY, Lu YQ, Fu Q. Comparative proteomic analysis of seminal plasma exosomes in buffalo with high and low sperm motility. BMC Genomics 2023; 24:8. [PMID: 36624393 PMCID: PMC9830767 DOI: 10.1186/s12864-022-09106-2] [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: 05/05/2022] [Accepted: 12/30/2022] [Indexed: 01/11/2023] Open
Abstract
BACKGROUND Exosomes are nanosized membranous vesicles secreted by various types of cells, which facilitate intercellular communication by transporting bioactive compounds. Exosomes are abundant in biological fluids including semen, and their protein composition and the potential of seminal plasma exosomes (SPEs) as fertility biomarkers were elucidated in humans, however, little information is available regarding buffalo (Bubalus bubalis). Here, we examined protein correlation between spermatozoa, seminal plasma (SP), and SPEs, and we compared and analyzed protein differences between high-motility (H-motility) and low-motility (L-motility) SPEs in buffalo. RESULTS SPEs were concentrated and purified by ultracentrifugation combined with sucrose density gradient centrifugation, followed by verification using western blotting, nanoparticle tracking analysis, and transmission electron microscopy. Protein composition in spermatozoa, SP and SPEs, and protein difference in H- and L-motility SPEs were identified by LC-MS/MS proteomic analysis and were functionally analyzed through comprehensive bioinformatics. Many SPEs proteins originated from spermatozoa and SP, and nearly one third were also present in spermatozoa and SP. A series of proteins associated with reproductive processes including sperm capacitation, spermatid differentiation, fertilization, sperm-egg recognition, membrane fusion, and acrosome reaction were integrated in a functional network. Comparative proteomic analyses showed 119 down-regulated and 41 up-regulated proteins in L-motility SPEs, compared with H-motility SPEs. Gene Ontology (GO) enrichment of differentially expressed proteins (DEPs) showed that most differential proteins were located in sperm and vesicles, with activities of hydrolase and metalloproteinase, and were involved in sperm-egg recognition, fertilization, single fertilization, and sperm-zona pellucida binding processes, etc. Kyoto Encyclopedia of Genes and Genomes (KEGG) analysis showed that differential proteins were mainly involved in the PPRP signaling pathway, calcium signaling pathway, and cAMP signaling pathway, among others. Furthermore, 6 proteins associated with reproduction were validated by parallel reaction monitoring analysis. CONCLUSION This study provides a comprehensive description of the seminal plasma exosome proteome and may be of use for further screening of biomarkers associated with male infertility.
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Affiliation(s)
- Kai Yu
- grid.256609.e0000 0001 2254 5798State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, Guangxi University, Nanning, 530004 China ,grid.256609.e0000 0001 2254 5798College of Animal Science and Technology, Guangxi University, Nanning, 530004 China
| | - Kai Xiao
- grid.256609.e0000 0001 2254 5798State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, Guangxi University, Nanning, 530004 China ,grid.256609.e0000 0001 2254 5798College of Animal Science and Technology, Guangxi University, Nanning, 530004 China
| | - Qin-qiang Sun
- grid.256609.e0000 0001 2254 5798State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, Guangxi University, Nanning, 530004 China ,grid.256609.e0000 0001 2254 5798College of Animal Science and Technology, Guangxi University, Nanning, 530004 China
| | - Run-feng Liu
- grid.256609.e0000 0001 2254 5798State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, Guangxi University, Nanning, 530004 China ,grid.256609.e0000 0001 2254 5798College of Animal Science and Technology, Guangxi University, Nanning, 530004 China
| | - Liang-feng Huang
- grid.256609.e0000 0001 2254 5798State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, Guangxi University, Nanning, 530004 China ,grid.256609.e0000 0001 2254 5798College of Animal Science and Technology, Guangxi University, Nanning, 530004 China
| | - Peng-fei Zhang
- grid.256609.e0000 0001 2254 5798State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, Guangxi University, Nanning, 530004 China ,grid.256609.e0000 0001 2254 5798College of Animal Science and Technology, Guangxi University, Nanning, 530004 China
| | - Hui-yan Xu
- grid.256609.e0000 0001 2254 5798State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, Guangxi University, Nanning, 530004 China ,grid.256609.e0000 0001 2254 5798College of Animal Science and Technology, Guangxi University, Nanning, 530004 China
| | - Yang-qing Lu
- grid.256609.e0000 0001 2254 5798State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, Guangxi University, Nanning, 530004 China ,grid.256609.e0000 0001 2254 5798College of Animal Science and Technology, Guangxi University, Nanning, 530004 China
| | - Qiang Fu
- grid.256609.e0000 0001 2254 5798State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, Guangxi University, Nanning, 530004 China
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Liu S, Ma X, Wang Z, Lin F, Li M, Li Y, Yang L, Rushdi HE, Riaz H, Gao T, Yang L, Fu T, Deng T. MAEL gene contributes to bovine testicular development through the m5C-mediated splicing. iScience 2023; 26:105941. [PMID: 36711243 PMCID: PMC9876746 DOI: 10.1016/j.isci.2023.105941] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2022] [Revised: 12/01/2022] [Accepted: 01/05/2023] [Indexed: 01/09/2023] Open
Abstract
Knowledge of RNA molecules regulating testicular development and spermatogenesis in bulls is essential for elite bull selection and an ideal breeding program. Herein, we performed direct RNA sequencing (DRS) to explore the functional characterization of RNA molecules produced in the testicles of 9 healthy Simmental bulls at three testicular development stages (prepuberty, puberty, and postpuberty). We identified 5,043 differentially expressed genes associated with testicular weight. These genes exhibited more alternative splicing at sexual maturity, particularly alternative 3' (A3) and 5' (A5) splice sites usage and exon skipping (SE). The expression of hub genes in testicular developmental stages was also affected by both m6A and m5C RNA modifications. We found m5C-mediated splicing events significantly (p < 0.05) increased MAEL gene expression at the isoform level, likely promoting spermatogenesis. Our findings highlight the complexity of RNA processing and expression as well as the regulation of transcripts involved in testicular development and spermatogenesis.
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Affiliation(s)
- Shenhe Liu
- College of Animal Science and Technology, Henan Agricultural University, Zhengzhou 450046, China
| | - Xiaoya Ma
- Guangxi Provincial Key Laboratory of Buffalo Genetics, Breeding and Reproduction Technology, Buffalo Research Institute, Chinese Academy of Agricultural Sciences, Nanning 530001, China
| | - Zichen Wang
- College of Animal Science and Technology, Henan Agricultural University, Zhengzhou 450046, China
| | - Feng Lin
- College of Animal Science and Technology, Henan Agricultural University, Zhengzhou 450046, China
| | - Ming Li
- College of Animal Science and Technology, Henan Agricultural University, Zhengzhou 450046, China
| | - Yali Li
- Wuhan Benagen Technology Co, Ltd, Wuhan 430000, China
| | - Liu Yang
- Wuhan Benagen Technology Co, Ltd, Wuhan 430000, China
| | - Hossam E. Rushdi
- Department of Animal Production, Faculty of Agriculture, Cairo University, Giza 12613, Egypt
| | - Hasan Riaz
- Department of Biosciences, COMSATS University Islamabad, Sahiwal Campus, Punjab, Pakistan
| | - Tengyun Gao
- College of Animal Science and Technology, Henan Agricultural University, Zhengzhou 450046, China
| | - Liguo Yang
- China Ministry of Education, Key Laboratory of Agricultural Animal Genetics, Breeding and Reproduction, College of Animal Science and Technology, Huazhong Agricultural University, Wuhan, China
| | - Tong Fu
- College of Animal Science and Technology, Henan Agricultural University, Zhengzhou 450046, China,Corresponding author
| | - Tingxian Deng
- Guangxi Provincial Key Laboratory of Buffalo Genetics, Breeding and Reproduction Technology, Buffalo Research Institute, Chinese Academy of Agricultural Sciences, Nanning 530001, China,Corresponding author
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3
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Roberts EK, Tardif S, Wright EA, Platt RN, Bradley RD, Hardy DM. Rapid divergence of a gamete recognition gene promoted macroevolution of Eutheria. Genome Biol 2022; 23:155. [PMID: 35821049 PMCID: PMC9275260 DOI: 10.1186/s13059-022-02721-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2021] [Accepted: 06/29/2022] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Speciation genes contribute disproportionately to species divergence, but few examples exist, especially in vertebrates. Here we test whether Zan, which encodes the sperm acrosomal protein zonadhesin that mediates species-specific adhesion to the egg's zona pellucida, is a speciation gene in placental mammals. RESULTS Genomic ontogeny reveals that Zan arose by repurposing of a stem vertebrate gene that was lost in multiple lineages but retained in Eutheria on acquiring a function in egg recognition. A 112-species Zan sequence phylogeny, representing 17 of 19 placental Orders, resolves all species into monophyletic groups corresponding to recognized Orders and Suborders, with <5% unsupported nodes. Three other rapidly evolving germ cell genes (Adam2, Zp2, and Prm1), a paralogous somatic cell gene (TectA), and a mitochondrial gene commonly used for phylogenetic analyses (Cytb) all yield trees with poorer resolution than the Zan tree and inferior topologies relative to a widely accepted mammalian supertree. Zan divergence by intense positive selection produces dramatic species differences in the protein's properties, with ordinal divergence rates generally reflecting species richness of placental Orders consistent with expectations for a speciation gene that acts across a wide range of taxa. Furthermore, Zan's combined phylogenetic utility and divergence exceeds those of all other genes known to have evolved in Eutheria by positive selection, including the only other mammalian speciation gene, Prdm9. CONCLUSIONS Species-specific egg recognition conferred by Zan's functional divergence served as a mode of prezygotic reproductive isolation that promoted the extraordinary adaptive radiation and success of Eutheria.
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Affiliation(s)
- Emma K Roberts
- Department of Biological Sciences, Texas Tech University, Lubbock, TX, USA.,Department of Cell Biology and Biochemistry, Texas Tech University Health Sciences Center, Lubbock, TX, USA
| | - Steve Tardif
- Department of Cell Biology and Biochemistry, Texas Tech University Health Sciences Center, Lubbock, TX, USA.,Reproductive Biology Division, JangoBio, Fitchburg, WI, USA
| | - Emily A Wright
- Department of Biological Sciences, Texas Tech University, Lubbock, TX, USA
| | - Roy N Platt
- Host-Pathogen Interaction Program, Texas Biomedical Research Institute, San Antonio, TX, USA
| | - Robert D Bradley
- Department of Biological Sciences, Texas Tech University, Lubbock, TX, USA.,Natural Science Research Laboratory, Museum of Texas Tech University, Lubbock, TX, USA
| | - Daniel M Hardy
- Department of Cell Biology and Biochemistry, Texas Tech University Health Sciences Center, Lubbock, TX, USA.
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Gundogan GI, Aktas A. Immunolocalization of Fertilin β, IZUMO1, and P34H in Ram Spermatozoa. Biopreserv Biobank 2021; 19:470-482. [PMID: 33956503 DOI: 10.1089/bio.2021.0006] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023] Open
Abstract
According to various reports, current methods of sperm freezing destroy the integrity of the sperm plasma membrane and acrosome. This study aimed to determine the changes in the existence and location of three proteins, namely fertilin β, IZUMO1, and P34H, in ram spermatozoa. By using frozen-thawed spermatozoa, ejaculated fresh spermatozoa, and testicular and epididymal spermatozoa (obtained from caput, corpus, and caudal regions), the localizations of the mentioned proteins were performed using signal labeling with indirect immunofluorescence, and the quantification of these proteins was compared using Western blot analyses. Moreover, protein localization and signal labeling in fresh and frozen-thawed spermatozoa subjected to in vitro capacitation and acrosome reaction were compared. Using chlortetracycline (CTC) staining, as expected, it was detected that after incubating for 4 hours under capacitating conditions related to the control sample (0 hour), capacitated and acrosome-reacted sperm were increased (p < 0.001). Frozen-thawed samples had a lower density and expression than the ejaculate samples. Expression was not obtained, except for IZUMO1, from samples that underwent in vitro capacitation/acrosome reactions. Expression of IZUMO1 was seen as an increasing band formation from the equatorial region through the acrosome, after in vitro capacitation. However, after the acrosome reaction, the band formation was only on the equatorial region. Region-specific differences of proteins at the kDa level were obtained using Western blot analysis and possible isoforms specific to ram spermatozoa or proteins with similar epitopes were expressed. Considering the changes in surface proteins in frozen-thawed sperm, it is suggested that fertilin β and P34H can be used as fertility or freezability markers.
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Affiliation(s)
- Gul Ipek Gundogan
- Department of Histology and Embryology, Faculty of Medicine, Istanbul Yeni Yuzyıl University, Istanbul, Turkey
| | - Abit Aktas
- Department of Histology and Embryology, Faculty of Veterinary Medicine, Istanbul University-Cerrahpasa, Istanbul, Turkey
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5
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Al-Shabebi A, Althnaian T, Alkhodair K. Localization and expression of ADAM2 in the dromedary camel testis, epididymis and sperm during rutting season. Anim Reprod 2021; 18:e20200241. [PMID: 33936295 PMCID: PMC8078865 DOI: 10.1590/1984-3143-ar2020-0241] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
Abstract
ADAM2 (fertilin β) is a sperm surface protein reported in several mammalian species. However, the presence of ADAM2 in the male reproductive system and sperm of the camel is not well known. The present study was to clarify the localization and expression of ADAM2 in the dromedary camel testis, epididymis and spermatozoa during rutting season using immunohistochemistry (IHC) and the quantitative real-time polymerase chain reaction (qPCR). Tissue samples were obtained from the testis (proximal and distal) and epididymis (caput, corpus, and cauda) from eight mature male camels. Epididymal and ejaculated sperms were collected from four other fertile camels. IHC analysis clearly showed the localization of ADAM2 protein in the spermatocytes and the round and elongated spermatids of the testis, in the epithelial cells along the epididymis tract, on the posterior head of the sperm within the cauda epididymis, and on the acrosomal cap of both the epididymal and ejaculated sperm. The expression of camel ADAM2 mRNA was significantly higher (P < 0.05) in the testis when compared with the epididymis. These findings may suggest an important role of ADAM2 in the fertility of male dromedary camels.
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Affiliation(s)
- Abdulkarem Al-Shabebi
- Department of Anatomy, College of Veterinary Medicine, king Faisal University, Al-Ahsa, Saudi Arabia.,College of Veterinary Medicine, Thamar University, Dhamar, Yemen
| | - Thnaian Althnaian
- Department of Anatomy, College of Veterinary Medicine, king Faisal University, Al-Ahsa, Saudi Arabia
| | - Khalid Alkhodair
- Department of Anatomy, College of Veterinary Medicine, king Faisal University, Al-Ahsa, Saudi Arabia
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6
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Li XF, Ren P, Shen WZ, Jin X, Zhang J. The expression, modulation and use of cancer-testis antigens as potential biomarkers for cancer immunotherapy. Am J Transl Res 2020; 12:7002-7019. [PMID: 33312347 PMCID: PMC7724325] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2020] [Accepted: 07/19/2020] [Indexed: 06/12/2023]
Abstract
Cancer-testis antigens (CTA) are tumor antigens, present in the germ cells of testes, ovaries and trophoblasts, which undergo deregulated expression in the tumor and malignant cells. CTA genes are either X-linked or autosomal, favourably expressed in spermatogonia and spermatocytes, respectively. CTAs trigger unprompted humoral immunity and immune responses in malignancies, altering tumor cell physiology and neoplastic behaviors. CTAs demonstrate varied expression profile, with increased abundance in malignant melanoma and prostate, lung, breast and epithelial cell cancers, and a relatively reduced prevalence in intestinal cancer, renal cell adenocarcinoma and malignancies of immune cells. A combination of epigenetic and non-epigenetic agents regulates CTA mRNA expression, with the key participation of CpG islands and CpG-rich promoters, histone methyltransferases, cytokines, tyrosine kinases and transcriptional activators and repressors. CTA triggers gametogenesis, in association with mutated tumorigenic genes and tumor repressors. The CTAs function as potential biomarkers, particularly for prostate, cervical, breast, colorectal, gastric, urinary bladder, liver and lung carcinomas, characterized by alternate splicing and phenotypic heterogeneity in the cells. Additionally, CTAs are prospective targets for vaccine therapy, with the MAGE-A3 and NYESO-1 undergoing clinical trials for tumor regression in malignant melanoma. They have been deemed important for adaptive immunotherapy, marked by limited expression in normal somatic tissues and recurrent up-regulation in epithelial carcinoma. Overall, the current review delineates an up-dated understanding of the intricate processes of CTA expression and regulation in cancer. It further portrays the role of CTAs as biomarkers and probable candidates for tumor immunotherapy, with a future prospect in cancer treatment.
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Affiliation(s)
- Xiao-Feng Li
- Department of Respiratory Medicine, The Second Hospital of Jilin UniversityChangchun, P. R. China
- Department of Oncology and Hematology, The Second Hospital of Jilin UniversityChangchun, P. R. China
| | - Ping Ren
- Department of Thoracic Surgery, The First Hospital of Jilin UniversityChangchun, P. R. China
| | - Wei-Zhang Shen
- Department of Oncology and Hematology, The Second Hospital of Jilin UniversityChangchun, P. R. China
| | - Xin Jin
- Department of Oncology and Hematology, The Second Hospital of Jilin UniversityChangchun, P. R. China
| | - Jie Zhang
- Department of Respiratory Medicine, The Second Hospital of Jilin UniversityChangchun, P. R. China
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Ramm SA, Lengerer B, Arbore R, Pjeta R, Wunderer J, Giannakara A, Berezikov E, Ladurner P, Schärer L. Sex allocation plasticity on a transcriptome scale: Socially sensitive gene expression in a simultaneous hermaphrodite. Mol Ecol 2019; 28:2321-2341. [PMID: 30891857 DOI: 10.1111/mec.15077] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2017] [Revised: 03/04/2019] [Accepted: 03/11/2019] [Indexed: 12/11/2022]
Abstract
Phenotypic plasticity can enable organisms to produce optimal phenotypes in multiple environments. A crucial life history trait that is often highly plastic is sex allocation, which in simultaneous hermaphrodites describes the relative investment into the male versus female sex functions. Theory predicts-and morphological evidence supports-that greater investment into the male function is favoured with increasing group size, due to the increasing importance of sperm competition for male reproductive success. Here, we performed a genome-wide gene expression assay to test for such sex allocation plasticity in a model simultaneous hermaphrodite, the free-living flatworm Macrostomum lignano. Based on RNA-Seq data from 16 biological replicates spanning four different group size treatments, we demonstrate that at least 10% of the >75,000 investigated transcripts in M. lignano are differentially expressed according to the social environment, rising to >30% of putative gonad-specific transcripts (spermatogenesis and oogenesis candidates) and tail-specific transcripts (seminal fluid candidates). This transcriptional response closely corresponds to the expected shift away from female and towards male reproductive investment with increasing sperm competition level. Using whole-mount in situ hybridization, we then confirm that many plastic transcripts exhibit the expected organ-specific expression, and RNA interference of selected testis- and ovary-specific candidates establishes that these indeed function in gametogenesis pathways. We conclude that a large proportion of sex-specific transcripts in M. lignano are differentially expressed according to the prevailing ecological conditions and that these are functionally relevant to key reproductive phenotypes. Our study thus begins to bridge organismal and molecular perspectives on sex allocation plasticity.
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Affiliation(s)
- Steven A Ramm
- Evolutionary Biology, Bielefeld University, Bielefeld, Germany.,Evolutionary Biology, Zoological Institute, University of Basel, Basel, Switzerland
| | - Birgit Lengerer
- Institute of Zoology & CMBI, University of Innsbruck, Innsbruck, Austria
| | - Roberto Arbore
- Evolutionary Biology, Zoological Institute, University of Basel, Basel, Switzerland
| | - Robert Pjeta
- Institute of Zoology & CMBI, University of Innsbruck, Innsbruck, Austria
| | - Julia Wunderer
- Institute of Zoology & CMBI, University of Innsbruck, Innsbruck, Austria
| | | | - Eugene Berezikov
- ERIBA, University Medical Center Groningen, Groningen, The Netherlands
| | - Peter Ladurner
- Institute of Zoology & CMBI, University of Innsbruck, Innsbruck, Austria
| | - Lukas Schärer
- Evolutionary Biology, Bielefeld University, Bielefeld, Germany
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Heidari M, Darbani S, Darbandi M, Lakpour N, Fathi Z, Zarnani AH, Zeraati H, Akhondi MM, Sadeghi MR. Assessing the potential of HSPA2 and ADAM2 as two biomarkers for human sperm selection. HUM FERTIL 2018; 23:123-133. [PMID: 30463455 DOI: 10.1080/14647273.2018.1534277] [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] [Indexed: 10/27/2022]
Abstract
Selection of the best sperm, with the least defects, is a critical factor in the success of ART especially in male factor infertility. This study assessed the potential Heat shock protein (HSPA2) and metallopeptidase domain2 (ADAM2) biomarkers for sperm selection. Sperm were obtained from 72 asthenoteratozoospermic and 42 normospermic ejaculates. The semen characteristic, DNA fragmentation (DFI), chromatin maturation index (CMI), ADAM2 and HSPA2 levels on sperm, and their correlation with embryo quality were assessed in both groups. Results showed the significant reduction in HSPA2 and ADAM2 in asthenoteratozoospermic compared to normazoospermic ejaculates regarding the cut-off value of 14 and 13% for these two biomarkers. The specificity of HSPA2 and ADAM2 separately, and the combination of these two biomarkers, were 95.2, 90.5 and 93.5%, respectively, for sperm from normozoospermic ejaculates. However, they were 48.6, 50.0 and 54.5% for asthenoteratozoospermic ones. A significant correlation was observed with HSPA2, ADAM2 and a combination of these two biomarkers with CMI, DFI and embryo quality. Although a combination of these two biomarkers have the potential to be a good choice for selecting sperm with the lowest level of chromatin damage, it seems that selection according to HSPA2 has priority over ADAM2 or a combination of the two.
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Affiliation(s)
- Mahnaz Heidari
- Reproductive Biotechnology Research Center, Avicenna Research Institute (ARI), ACECR, Tehran, Iran
| | - Sara Darbani
- Reproductive Biotechnology Research Center, Avicenna Research Institute (ARI), ACECR, Tehran, Iran
| | - Mahsa Darbandi
- Reproductive Biotechnology Research Center, Avicenna Research Institute (ARI), ACECR, Tehran, Iran
| | - Niknam Lakpour
- Reproductive Biotechnology Research Center, Avicenna Research Institute (ARI), ACECR, Tehran, Iran
| | - Zohreh Fathi
- Avicenna Infertility Clinical Fertility and Infertility (ARI), Tehran, Iran
| | - Amir Hasan Zarnani
- Monoclonal Antibody Research Center, Avicenna Research Institute (ARI), ACECR, Tehran, Iran
| | - Hodjat Zeraati
- Departments of Epidemiology and Biostatistics, University of Tehran Medical Sciences, Tehran, Iran
| | - Mohammad Mehdi Akhondi
- Reproductive Biotechnology Research Center, Avicenna Research Institute (ARI), ACECR, Tehran, Iran
| | - Mohammad Reza Sadeghi
- Monoclonal Antibody Research Center, Avicenna Research Institute (ARI), ACECR, Tehran, Iran
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9
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De Jonge C. Biological basis for human capacitation-revisited. Hum Reprod Update 2017; 23:289-299. [PMID: 28115407 DOI: 10.1093/humupd/dmw048] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2016] [Accepted: 01/03/2017] [Indexed: 01/21/2023] Open
Abstract
BACKGROUND A little more than a decade ago a review entitled 'Biological basis for human capacitation' was published. A primary conclusion of the review was that with all the technological advances that have been made since the first experiments demonstrated the in vivo requirement of capacitation for fertilization, very little progress had since been made, most significantly for human. OBJECTIVE AND RATIONALE The present review was carried out to provide an update on the biological basis for human capacitation. It briefly revisits the original schema, presents a review of the literature that urged research interest in human sperm capacitation and puts under the spotlight the original definition of capacitation balanced against the limitations of experiments in vitro to characterize a complex process that necessarily mandates a female component, and very recent findings in the mouse. It also includes proposed considerations for new thinking regarding capacitation, and progress toward understanding the biology of human capacitation. SEARCH METHODS The PubMed, Google Scholar and Scopus literature databases were reviewed extensively using inclusive, broad and multispecies search terms without publication date limitation. OUTCOMES Comprehensive screening of the literature database showed that no papers regarding human sperm capacitation in vivo have been published in the past 20 years. Recent experiments in the mouse have provided compelling and unanticipated data regarding capacitation and in vivo fertilization. Questions were posed and addressed regarding: stimuli for initiation of capacitation, capacitation relative to the cumulus-oocyte complex, comparison between in vivo and in vitro capacitation, and potential species-specific differences in location and timing of capacitation. WIDER IMPLICATIONS There has been no progress on the in vivo biology of human sperm capacitation since before the turn of the century. Human IVF and its technologies may likely have inhibited, and continue to hold back, any future in vivo experiments that would address one or more questions regarding acquisition of fertilizing capacity in human. The limiting factor for progress in the area is access to funding and human subjects.
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Affiliation(s)
- Christopher De Jonge
- Andrology Program, University of Minnesota Medical Center, 606 24th Avenue South, Suite 525, Minneapolis, MN 55454, USA.,Department of Urology, University of Minnesota, Minneapolis, MN 55454, USA
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