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Zhou Y, Chen L, Han H, Xiong B, Zhong R, Jiang Y, Liu L, Sun H, Tan J, Cheng X, Schroyen M, Gao Y, Zhao Y, Zhang H. Taxifolin increased semen quality of Duroc boars by improving gut microbes and blood metabolites. Front Microbiol 2022; 13:1020628. [PMCID: PMC9614168 DOI: 10.3389/fmicb.2022.1020628] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2022] [Accepted: 09/09/2022] [Indexed: 11/13/2022] Open
Abstract
Taxifolin (TAX), as a natural flavonoid, has been widely focused on due to its strong anti-oxidation, anti-inflammation, anti-virus, and even anti-tumor activity. However, the effect of TAX on semen quality was unknown. The purpose of this study was to analyze the beneficial influences of adding feed additive TAX to boar semen in terms of its quality and potential mechanisms. We discovered that TAX increased sperm motility significantly in Duroc boars by the elevation of the protein levels such as ZAG, PKA, CatSper, and p-ERK for sperm quality. TAX increased the blood concentration of testosterone derivatives, antioxidants such as melatonin and betaine, unsaturated fatty acids such as DHA, and beneficial amino acids such as proline. Conversely, TAX decreased 10 different kinds of bile acids in the plasma. Moreover, TAX increased “beneficial” microbes such as Intestinimonas, Coprococcus, Butyrivibrio, and Clostridium_XlVa at the Genus level. However, TAX reduced the “harmful” intestinal bacteria such as Prevotella, Howardella, Mogibacterium, and Enterococcus. There was a very close correlation between fecal microbes, plasma metabolites, and semen parameters by the spearman correlation analysis. Therefore, the data suggest that TAX increases the semen quality of Duroc boars by benefiting the gut microbes and blood metabolites. It is supposed that TAX could be used as a kind of feed additive to increase the semen quality of boars to enhance production performance.
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Affiliation(s)
- Yexun Zhou
- State Key Laboratory of Animal Nutrition, Institute of Animal Sciences, Chinese Academy of Agricultural Sciences, Beijing, China
- Precision Livestock and Nutrition Unit, Gembloux Agro-Bio Tech, University of Liège, Gembloux, Belgium
| | - Liang Chen
- State Key Laboratory of Animal Nutrition, Institute of Animal Sciences, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Hui Han
- State Key Laboratory of Animal Nutrition, Institute of Animal Sciences, Chinese Academy of Agricultural Sciences, Beijing, China
- Precision Livestock and Nutrition Unit, Gembloux Agro-Bio Tech, University of Liège, Gembloux, Belgium
| | - Bohui Xiong
- State Key Laboratory of Animal Nutrition, Institute of Animal Sciences, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Ruqing Zhong
- State Key Laboratory of Animal Nutrition, Institute of Animal Sciences, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Yue Jiang
- State Key Laboratory of Animal Nutrition, Institute of Animal Sciences, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Lei Liu
- State Key Laboratory of Animal Nutrition, Institute of Animal Sciences, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Haiqing Sun
- YangXiang Joint Stock Company, Guigang, China
| | - Jiajian Tan
- YangXiang Joint Stock Company, Guigang, China
| | | | - Martine Schroyen
- Precision Livestock and Nutrition Unit, Gembloux Agro-Bio Tech, University of Liège, Gembloux, Belgium
| | - Yang Gao
- College of Life Science, Baicheng Normal University, Baicheng, Jilin, China
- Yang Gao,
| | - Yong Zhao
- State Key Laboratory of Animal Nutrition, Institute of Animal Sciences, Chinese Academy of Agricultural Sciences, Beijing, China
- Yong Zhao, ;
| | - Hongfu Zhang
- State Key Laboratory of Animal Nutrition, Institute of Animal Sciences, Chinese Academy of Agricultural Sciences, Beijing, China
- *Correspondence: Hongfu Zhang,
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Han H, Zhou Y, Xiong B, Zhong R, Jiang Y, Sun H, Tan J, Zhang B, Guan C, Schroyen M, Chen L, Zhao Y, Zhang H. Alginate oligosaccharides increase boar semen quality by affecting gut microbiota and metabolites in blood and sperm. Front Microbiol 2022; 13:982152. [PMID: 36071975 PMCID: PMC9441641 DOI: 10.3389/fmicb.2022.982152] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2022] [Accepted: 08/08/2022] [Indexed: 11/13/2022] Open
Abstract
Alginate oligosaccharides (AOS), natural polymers from brown seaweeds (such as Laminaria japonica, Undaria pinnatifida, and Sargassum fusiforme), have been reported to possess many beneficial advantages for health. In the current study, after 9 weeks of dietary supplementation, AOS 10 mg/kg group (AOS 10) group increased boar sperm motility from 87.8% to 93.5%, p < 0.05. Moreover, AOS10 increased the relative abundances of Bifidobacterium, Coprococcus, Butyricicoccus (1.3–2.3-fold; p < 0.05) to increase the beneficial blood and sperm metabolites (1.2–1.6-fold; p < 0.05), and important sperm proteins such as gelsolin, Zn-alpha2 glycoprotein, Cation Channel Sperm-Associated Protein, outer dense fiber of sperm tails, etc. (1.5–2.2-fold; p < 0.05). AOS had a long-term beneficial advantage on boar semen quality by the increase in semen volume (175 vs. 160 ml/ejaculation, p < 0.05). AOS may be used as dietary additives for improving semen quality.
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Affiliation(s)
- Hui Han
- State Key Laboratory of Animal Nutrition, Institute of Animal Sciences, Chinese Academy of Agricultural Sciences, Beijing, China
- Department of AgroBioChem, Precision Livestock and Nutrition Laboratory, Teaching and Research Centre (TERRA), Gembloux AgroBioTech, University of Liège, Gembloux, Belgium
| | - Yexun Zhou
- State Key Laboratory of Animal Nutrition, Institute of Animal Sciences, Chinese Academy of Agricultural Sciences, Beijing, China
- Department of AgroBioChem, Precision Livestock and Nutrition Laboratory, Teaching and Research Centre (TERRA), Gembloux AgroBioTech, University of Liège, Gembloux, Belgium
| | - Bohui Xiong
- State Key Laboratory of Animal Nutrition, Institute of Animal Sciences, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Ruqing Zhong
- State Key Laboratory of Animal Nutrition, Institute of Animal Sciences, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Yue Jiang
- State Key Laboratory of Animal Nutrition, Institute of Animal Sciences, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Haiqing Sun
- YangXiang Joint Stock Company, Guigang, China
| | - Jiajian Tan
- YangXiang Joint Stock Company, Guigang, China
| | - Bin Zhang
- Qingdao BZ Oligo Biotech Co., Ltd, Qingdao, China
| | - Chang Guan
- Qingdao BZ Oligo Biotech Co., Ltd, Qingdao, China
| | - Martine Schroyen
- Department of AgroBioChem, Precision Livestock and Nutrition Laboratory, Teaching and Research Centre (TERRA), Gembloux AgroBioTech, University of Liège, Gembloux, Belgium
| | - Liang Chen
- State Key Laboratory of Animal Nutrition, Institute of Animal Sciences, Chinese Academy of Agricultural Sciences, Beijing, China
- *Correspondence: Liang Chen,
| | - Yong Zhao
- State Key Laboratory of Animal Nutrition, Institute of Animal Sciences, Chinese Academy of Agricultural Sciences, Beijing, China
- Yong Zhao, ;
| | - Hongfu Zhang
- State Key Laboratory of Animal Nutrition, Institute of Animal Sciences, Chinese Academy of Agricultural Sciences, Beijing, China
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3
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Liu Y, Zhang C, Wang S, Hu Y, Jing J, Ye L, Jing R, Ding Z. Dependence of sperm structural and functional integrity on testicular calcineurin isoform PPP3R2 expression. J Mol Cell Biol 2021; 12:515-529. [PMID: 31900494 PMCID: PMC7493031 DOI: 10.1093/jmcb/mjz115] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2019] [Revised: 09/05/2019] [Accepted: 11/27/2019] [Indexed: 01/09/2023] Open
Abstract
After leaving the testis, mammalian sperm undergo a sequential maturation process in the epididymis followed by capacitation during their movement through the female reproductive tract. These phenotypic changes are associated with modification of protein phosphorylation and membrane remodeling, which is requisite for sperm to acquire forward motility and induce fertilization. However, the molecular mechanisms underlying sperm maturation and capacitation are still not fully understood. Herein, we show that PPP3R2, a testis-specific regulatory subunit of protein phosphatase 3 (an isoform of calcineurin in the testis), is essential for sperm maturation and capacitation. Knockout of Ppp3r2 in mice leads to male sterility due to sperm motility impairment and morphological defects. One very noteworthy change includes increases in sperm membrane stiffness. Moreover, PPP3R2 regulates sperm maturation and capacitation via (i) modulation of membrane diffusion barrier function at the annulus and (ii) facilitation of cholesterol efflux during sperm capacitation. Taken together, PPP3R2 plays a critical role in modulating cholesterol efflux and mediating the dynamic control of membrane remodeling during sperm maturation and capacitation.
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Affiliation(s)
- Yue Liu
- Department of Histology, Embryology, Genetics and Developmental Biology, Shanghai Key Laboratory for Reproductive Medicine, Shanghai Jiao Tong University School of Medicine, Shanghai 200025, China
| | - Chujun Zhang
- Department of Clinical Medicine, Shanghai Jiao Tong University School of Medicine, Shanghai 200025, China
| | - Shiyao Wang
- Department of Clinical Medicine, Shanghai Jiao Tong University School of Medicine, Shanghai 200025, China
| | - Yanqin Hu
- Department of Histology, Embryology, Genetics and Developmental Biology, Shanghai Key Laboratory for Reproductive Medicine, Shanghai Jiao Tong University School of Medicine, Shanghai 200025, China
| | - Jia Jing
- Department of Histology, Embryology, Genetics and Developmental Biology, Shanghai Key Laboratory for Reproductive Medicine, Shanghai Jiao Tong University School of Medicine, Shanghai 200025, China
| | - Luyao Ye
- Department of Clinical Medicine, Shanghai Jiao Tong University School of Medicine, Shanghai 200025, China
| | - Ran Jing
- Department of Clinical Medicine, Shanghai Jiao Tong University School of Medicine, Shanghai 200025, China
| | - Zhide Ding
- Department of Histology, Embryology, Genetics and Developmental Biology, Shanghai Key Laboratory for Reproductive Medicine, Shanghai Jiao Tong University School of Medicine, Shanghai 200025, China
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4
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Sáez-Espinosa P, López-Huedo A, Robles-Gómez L, Huerta-Retamal N, Aizpurua J, Gómez-Torres MJ. Characterization of Human Spermatic Subpopulations by ConA-Binding Sites and Tyrosine Phosphorylation during in vitro Capacitation and Acrosome Reaction. Cells Tissues Organs 2021; 210:1-9. [PMID: 33873194 DOI: 10.1159/000513275] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2020] [Accepted: 11/20/2020] [Indexed: 11/19/2022] Open
Abstract
Spermatozoa capacitation is a time-dependent physiological process essential for acquiring the fertilizing capacity. In this context, reorganization of spermatozoa surface sugars and tyrosine phosphorylation are some of the most important biochemical changes involved in capacitation. However, the relationship between these 2 biomarkers remains poorly defined. By cytofluorescence we simultaneously characterized the head concanavalin A (ConA)-binding sites and the flagellar tyrosine phosphorylation before capacitation, during different capacitation times (1 and 4 h), and after acrosome reaction induction in human spermatozoa. The results showed a strong connection between ConA-label patterns and tyrosine phosphorylation according to the spermatozoa capacitation time and acrosomal status. Specifically, the spermatozoa subpopulation with phosphotyrosine presented proper sugar location (label in acrosomal and postacrosomal region) just after 1 h of capacitation, while cells without phosphotyrosine needed 4 h to do it. Moreover, after induction of spermatozoa acrosome reaction, phosphorylation was significantly correlated (p < 0.05) with the relocation of ConA-binding residues to the equatorial region, regardless of capacitation time. Overall, these observations provide novel insights regarding spermatozoa subpopulations based on essential physiological events like capacitation and acrosome reaction, which could have potential implications in the improvement of spermatozoa selection techniques.
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Affiliation(s)
- Paula Sáez-Espinosa
- Department of Biotechnology, Faculty of Science, University of Alicante, Alicante, Spain
| | - Alba López-Huedo
- Department of Biotechnology, Faculty of Science, University of Alicante, Alicante, Spain
| | - Laura Robles-Gómez
- Department of Biotechnology, Faculty of Science, University of Alicante, Alicante, Spain
| | - Natalia Huerta-Retamal
- Department of Biotechnology, Faculty of Science, University of Alicante, Alicante, Spain
| | - Jon Aizpurua
- IVF Spain, Reproductive Medicine, Alicante, Spain.,Human Fertility Cathedra, University of Alicante, Alicante, Spain
| | - María José Gómez-Torres
- Department of Biotechnology, Faculty of Science, University of Alicante, Alicante, Spain.,Human Fertility Cathedra, University of Alicante, Alicante, Spain
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Mannosylated glycoconjugates on the surface of activated sperm in the giant freshwater prawn are crucial for sperm binding with the egg vitelline envelop. Cell Tissue Res 2021; 384:179-193. [PMID: 33427951 DOI: 10.1007/s00441-020-03324-4] [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: 06/29/2020] [Accepted: 10/12/2020] [Indexed: 10/22/2022]
Abstract
The unusual morphology and poorly defined acrosome-like structure in the mature sperm of the giant freshwater prawn Macrobrachium rosenbergii has led to difficulties in identifying the state of sperm activation. Mature distal vas deferens sperm (dVSp) can be activated by the calcium ionophore A23187 to show acrosome reaction-like enzymatic activities that increase their binding and penetration capabilities. However, these short-lived enzymatic activities limit their usefulness as a marker of sperm activation for further qualitative and quantitative analyses, leading to our examining the alterations in the exposure of sperm surface glycoconjugates both as markers of sperm activation and for their role in gamete interaction. Our results showed that after A23187 treatment, there was an increased exposure of mannosylated glycoconjugates on the sperm surface revealed by significant Concanavalin A (Con A) staining. Furthermore, sodium metaperiodate pre-treatment, Con A pre-incubation, or co-incubation with α-mannose monosaccharides all significantly reduced A23187-induced dVSp binding to the egg vitelline envelop, demonstrating the importance of sperm surface mannosylated glycoconjugates in the binding process. These same pre-treatments of sperm also resulted in the inhibition of the binding of soluble vitelline envelop proteins (MrVE) to both the sperm surface and to mannosylated dVSp protein bands. Therefore, the present study demonstrated the importance of the exposure of mannosylated glycoconjugates on the surface of activated dVSp, both as a reliable marker of sperm activation and as a binding factor in the gamete interaction process. Furthermore, these findings allow for a better understanding of the surface glycoconjugate-mediated interaction process between gametes in this species of prawn.
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6
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Romauch M. Zinc-α2-glycoprotein as an inhibitor of amine oxidase copper-containing 3. Open Biol 2020; 10:190035. [PMID: 32315567 PMCID: PMC6685929 DOI: 10.1098/rsob.190035] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2019] [Accepted: 07/04/2019] [Indexed: 12/12/2022] Open
Abstract
Zinc-α2-glycoprotein (ZAG) is a major plasma protein whose levels increase in chronic energy-demanding diseases and thus serves as an important clinical biomarker in the diagnosis and prognosis of the development of cachexia. Current knowledge suggests that ZAG mediates progressive weight loss through β-adrenergic signalling in adipocytes, resulting in the activation of lipolysis and fat mobilization. Here, through cross-linking experiments, amine oxidase copper-containing 3 (AOC3) is identified as a novel ZAG binding partner. AOC3-also known as vascular adhesion protein 1 (VAP-1) and semicarbazide sensitive amine oxidase (SSAO)-deaminates primary amines, thereby generating the corresponding aldehyde, H2O2 and NH3. It is an ectoenzyme largely expressed by adipocytes and induced in endothelial cells during inflammation. Extravasation of immune cells depends on amine oxidase activity and AOC3-derived H2O2 has an insulinogenic effect. The observations described here suggest that ZAG acts as an allosteric inhibitor of AOC3 and interferes with the associated pro-inflammatory and anti-lipolytic functions. Thus, inhibition of the deamination of lipolytic hormone octopamine by AOC3 represents a novel mechanism by which ZAG might stimulate lipolysis. Furthermore, experiments involving overexpression of recombinant ZAG reveal that its glycosylation is co-regulated by oxygen availability and that the pattern of glycosylation affects its inhibitory potential. The newly identified protein interaction between AOC3 and ZAG highlights a previously unknown functional relationship, which may be relevant to inflammation, energy metabolism and the development of cachexia.
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Affiliation(s)
- Matthias Romauch
- Institute of Molecular Biosciences, Karl-Franzens-University, Graz, Austria
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7
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Kekäläinen J, Evans JP. Female-induced remote regulation of sperm physiology may provide opportunities for gamete-level mate choice. Evolution 2016; 71:238-248. [DOI: 10.1111/evo.13141] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2016] [Revised: 11/10/2016] [Accepted: 11/15/2016] [Indexed: 12/20/2022]
Affiliation(s)
- Jukka Kekäläinen
- Centre for Evolutionary Biology, School of Animal Biology; University of Western Australia; Crawley WA 6009 Australia
- Department of Environmental and Biological Sciences; University of Eastern Finland; Joensuu Finland
| | - Jonathan P. Evans
- Centre for Evolutionary Biology, School of Animal Biology; University of Western Australia; Crawley WA 6009 Australia
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8
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Kekäläinen J, Larma I, Linden M, Evans JP. Lectin staining and flow cytometry reveals female-induced sperm acrosome reaction and surface carbohydrate reorganization. Sci Rep 2015; 5:15321. [PMID: 26470849 PMCID: PMC4607886 DOI: 10.1038/srep15321] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2015] [Accepted: 09/21/2015] [Indexed: 12/27/2022] Open
Abstract
All cells are covered by glycans, an individually unique layer of oligo- and polysaccharides that are critical moderators of self-recognition and other cellular-level interactions (e.g. fertilization). The functional similarity between these processes suggests that gamete surface glycans may also have an important, but currently overlooked, role in sexual selection. Here we develop a user-friendly methodological approach designed to facilitate future tests of this possibility. Our proposed method is based on flow cytometric quantification of female-induced sperm acrosome reaction and sperm surface glycan modifications in the Mediterranean mussel Mytilus galloprovincialis. In this species, as with many other taxa, eggs release water-soluble factors that attract conspecific sperm (chemoattraction) and promote potentially measurable changes in sperm behavior and physiology. We demonstrate that flow cytometry is able to identify sperm from other seawater particles as well as accurately measure both acrosome reaction and structural modifications in sperm glycans. This methodological approach can increase our understanding of chemically-moderated gamete-level interactions and individual-specific gamete recognition in Mytilus sp. and other taxa with similar, easily identifiable acrosome structure. Our approach is also likely to be applicable to several other species, since carbohydrate-mediated cellular-level interactions between gametes are universal among externally and internally fertilizing species.
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Affiliation(s)
- Jukka Kekäläinen
- University of Western Australia, Centre for Evolutionary Biology, School of Animal Biology (M092), Crawley, Australia
- University of Eastern Finland, Department of Biology, Joensuu, Finland
| | - Irma Larma
- University of Western Australia, Harry Perkins Institute of Medical Research, Centre for Microscopy, Characterization and Analysis, Crawley, Australia
| | - Matthew Linden
- University of Western Australia, Harry Perkins Institute of Medical Research, Centre for Microscopy, Characterization and Analysis, Crawley, Australia
| | - Jonathan P. Evans
- University of Western Australia, Centre for Evolutionary Biology, School of Animal Biology (M092), Crawley, Australia
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9
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The identification of proteomic markers of sperm freezing resilience in ram seminal plasma. J Proteomics 2015; 126:303-11. [DOI: 10.1016/j.jprot.2015.05.017] [Citation(s) in RCA: 54] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2015] [Revised: 05/18/2015] [Accepted: 05/18/2015] [Indexed: 02/04/2023]
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10
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Liu Y, Zhu Y, Wu X, Li Y, Guo Q, Li W, Ding Z. Increased expression of ERp57 in rat oocytes during meiotic maturation is associated with sperm-egg fusion. Mol Reprod Dev 2014; 81:315-25. [DOI: 10.1002/mrd.22300] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2013] [Accepted: 01/05/2014] [Indexed: 01/18/2023]
Affiliation(s)
- Yue Liu
- Department of Human Anatomy; Histology and Embryology; Shanghai Key Laboratory for Reproductive Medicine; School of Medicine; Shanghai Jiao Tong University; Shanghai China
| | - Yemin Zhu
- Department of Biochemistry and Molecular Cell Biology; School of Medicine; Shanghai Jiao Tong University; Shanghai China
| | - Xiaohui Wu
- Department of Obstetrics and Gynecology; Putuo Hospital, Shanghai University of Traditional Chinese Medicine; Shanghai China
| | - Yandong Li
- Department of Clinical Medicine; School of Medicine; Shanghai Jiao Tong University; Shanghai China
| | - Qiangsu Guo
- Department of Human Anatomy; Histology and Embryology; Shanghai Key Laboratory for Reproductive Medicine; School of Medicine; Shanghai Jiao Tong University; Shanghai China
| | - Weiping Li
- Department of Obstetrics and Gynecology; Renji Hospital; School of Medicine Shanghai Jiao Tong University; Shanghai China
| | - Zhide Ding
- Department of Human Anatomy; Histology and Embryology; Shanghai Key Laboratory for Reproductive Medicine; School of Medicine; Shanghai Jiao Tong University; Shanghai China
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11
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Liu Y, Zhao W, Gu G, Lu L, Feng J, Guo Q, Ding Z. Palmitoyl-protein thioesterase 1 (PPT1): an obesity-induced rat testicular marker of reduced fertility. Mol Reprod Dev 2013; 81:55-65. [PMID: 24302477 DOI: 10.1002/mrd.22281] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2013] [Accepted: 11/05/2013] [Indexed: 11/09/2022]
Abstract
Male obesity may lead to declines in testosterone levels, reproductive hormonal profile, and semen quantity. To assess the effects of obesity on spermatogenesis, Sprague-Dawley rats fed a high-fat diet served as a model of induced obesity. The litter sizes for females mated to obese males were significantly lower as compared to females mated with normal-diet-fed controls. Their serum high-density lipoprotein, low-density lipoprotein, cholesterol, and estradiol levels increased in obese males, but testosterone and follicle-stimulating hormone levels decreased. Testicular morphology disruptions included Sertoli-cell atrophy, disrupted tight junctions, and mitochondrial degeneration in spermatogenic cells. To further investigate the molecular mechanisms leading to high-fat-diet-induced changes, we employed testicular proteomic analysis on rats fed both types of diet. Three spots were up-regulated in rats fed a high-fat diet whereas two others were downregulated. One of the upregulated spots was palmitoyl-protein thioesterase 1 (PPT1), a lipoprotein metabolizing related enzyme localized to Sertoli cells. In a Sertoli-cell line cultured in a high-fat supplemented medium, PPT1 abundance was accompanied by increases in the endocytic vesicle-associated protein, clathrin, and decreases in the tight junctional proteins, ZO-1 and occludin. In conclusion, declines in rat male fertility induced by a high-fat diet are associated with an altered testicular protein expression pattern as well as disruption of testicular Sertoli-cell and spermatogenic-cell morphology. PPT1 expression may provide a testicular marker of reduced fertility in obese males, as increases in its expression may be detrimental to Sertoli-cell function during spermatogenesis.
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Affiliation(s)
- Yue Liu
- Department of Human Anatomy, Histology and Embryology, Shanghai Key Laboratory for Reproductive Medicine, School of Medicine, Shanghai Jiao Tong University, Shanghai, 200025, China
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12
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Liu Y, Chen G, Lu L, Sun H, Guo Q, Xue K, Fan Y, Ding Z. RNASET2 in human spermatozoa and seminal plasma: a novel relevant indicator for asthenozoospermia. Andrology 2012; 1:75-84. [DOI: 10.1111/j.2047-2927.2012.00022.x] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2012] [Revised: 08/21/2012] [Accepted: 09/04/2012] [Indexed: 11/29/2022]
Affiliation(s)
- Y. Liu
- Department of Histology and Embryology; School of Medicine; Shanghai Key Laboratory for Reproductive Medicine; Shanghai Jiao Tong University; Shanghai; China
| | - G. Chen
- Shanghai Jiai Genetics and IVF Institute-China USA Center; Shanghai; China
| | - L. Lu
- Shanghai Institute of Immunology; Shanghai; China
| | - H. Sun
- Department of Biochemistry and Molecular Cell Biology; School of Medicine; Shanghai Jiao Tong University; Shanghai; China
| | - Q. Guo
- Department of Histology and Embryology; School of Medicine; Shanghai Key Laboratory for Reproductive Medicine; Shanghai Jiao Tong University; Shanghai; China
| | - K. Xue
- Department of Histology and Embryology; School of Medicine; Shanghai Key Laboratory for Reproductive Medicine; Shanghai Jiao Tong University; Shanghai; China
| | - Y. Fan
- Department of Histology and Embryology; School of Medicine; Shanghai Key Laboratory for Reproductive Medicine; Shanghai Jiao Tong University; Shanghai; China
| | - Z. Ding
- Department of Histology and Embryology; School of Medicine; Shanghai Key Laboratory for Reproductive Medicine; Shanghai Jiao Tong University; Shanghai; China
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13
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Das T, Chatterjee T. Deglycosylation effect of the mammalian sperm maturation antigen (SMA2) on serological reaction and acrosome reaction. Anim Reprod Sci 2012; 133:176-83. [PMID: 22824309 DOI: 10.1016/j.anireprosci.2012.07.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2011] [Revised: 06/29/2012] [Accepted: 07/02/2012] [Indexed: 10/28/2022]
Abstract
Spermatozoal membrane proteins are considered to possess several immunological unique characteristics as the cell is formed behind the blood-testes barriers. Major goat sperm maturation antigen (SMA2) contains one hexosamine along with mannose, galactose and glucose. In the present study, effects of deglycosylation of SMA2 antigen on immuno-reactivity and the serological activity was investigated. SMA2 glycoantigen showed positive immunoreactivity after treatment with sodium borohydride (NaBH(4)) and moreover this generated a 44 kDa protein band which was negative for periodic acid Schiff reagent. Trifluoromethanesulfonic acid (TFMS) caused aggregation and restricted the free mobility of the treated antigen on SDS-PAGE and the protein band generated by TFMS treatment also showed positive immuno-reactivity. The results supported the views that the protein portion retains its immuno-reactivity even after oxidation of the vicinal hydroxyl group of saccharide component of SMA2 antigen. These data suggest that immunodominent epitopes exist on the core protein by which the SMA2 antigen retains its immuno-reactivity even after disruption of the saccharide portion. Additional experiments demonstrate that protein epitopes have a role in capacitation and the acrosome reaction (AR) in presence of antibody which is raised against this protein part of SMA2 using the negative staining of FITC-PSA (fluorescein isothiocyanate-labeled Pisum sativum agglutinin) probe. Altogether these findings indicate that the protein portion of SMA2 might fulfill the serological activity of the antigen as well as the protein epitope affects the acrosome reaction. In view of this property, we propose that the protein portion of SMA2 antigen might be considered as a potential antigenic target for an immune response.
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Affiliation(s)
- Tapasi Das
- Department of Molecular and Human Genetics Division, Indian Institute of Chemical Biology, Jadavpur, Kolkata, WB, India. tapasi
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