1
|
Doğan G, Sandıkçı M, Karagenç L. Stage-specific expression of Toll-like receptors in the seminiferous epithelium of mouse testis. Histochem Cell Biol 2024:10.1007/s00418-024-02310-z. [PMID: 39085445 DOI: 10.1007/s00418-024-02310-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 07/15/2024] [Indexed: 08/02/2024]
Abstract
Genes encoding Toll-like receptors (TLRs) are expressed by germ cells in the mouse testis. Nevertheless, the expression of TLRs by germ cells has only been demonstrated for TLR-3, TLR-9, and TLR-11. Furthermore, the expression of each TLR in relation to the stage of spermatogenesis remains uncertain. We aimed in the present study to examine the expression pattern of all TLRs in germ cells throughout the cycle of seminiferous epithelium in the adult mouse testis. Immunohistochemistry was used to evaluate the expression of TLRs. Results of the present study reveal the expression of TLRs by specific populations of germ cells. Expression of TLRs, except for TLR-7, at endosomal compartments, acrosomes, and/or residual bodies was another interesting and novel finding of the present study. We further demonstrate that the expression of TLR-1, -2, -3, -4, -5, -7, -11, -12, and -13 follows a distinct spatiotemporal pattern throughout the cycle of seminiferous epithelium. While TLR-1, -3, -5, -11, and -12 are expressed in all stages, TLR-4 is expressed only in early and middle stages of spermatogenic cycle. On the other hand, TLR-2, -7, and -13 are expressed only in early stage of spermatogenic cycle. Evidence demonstrating the expression of TLRs in a stage specific manner throughout spermatogenesis strengthen the hypothesis that the expression of various TLRs by germ cells is a developmentally regulated process. However, if TLRs play a role in the regulation of proliferation, growth, maturation, and differentiation of germ cells throughout the cycle of the seminiferous epithelium warrants further investigations.
Collapse
Affiliation(s)
- Göksel Doğan
- Faculty of Veterinary Medicine, Department of Histology-Embryology, Aydın Adnan Menderes University, 09000, Aydın, Turkey
| | - Mustafa Sandıkçı
- Faculty of Veterinary Medicine, Department of Histology-Embryology, Aydın Adnan Menderes University, 09000, Aydın, Turkey
| | - Levent Karagenç
- Faculty of Veterinary Medicine, Department of Histology-Embryology, Aydın Adnan Menderes University, 09000, Aydın, Turkey.
| |
Collapse
|
2
|
Li C, Yu R, Liu H, Qiao J, Zhang F, Mu S, Guo M, Zhang H, Li Y, Kang X. Sperm acrosomal released proteome reveals MDH and VDAC3 from mitochondria are involved in acrosome formation during spermatogenesis in Eriocheir sinensis. Gene 2023; 887:147784. [PMID: 37689223 DOI: 10.1016/j.gene.2023.147784] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2023] [Revised: 08/22/2023] [Accepted: 09/06/2023] [Indexed: 09/11/2023]
Abstract
Acrosome is inextricably related to membranous organelles. The origin of acrosome is still controversial, one reason is that limited articles were reported about the proteomic analysis of the acrosome. Mitochondrial proteins were found exist in the acrosome, nevertheless, only limited attention has been paid to the function of mitochondrial proteins in the acrosome formation. Eriocheir sinensis sperm has a large acrosome, which makes it an ideal model to study acrosome formation. Here, we firstly compared the rate of acrosome reaction induced by the calcium ionophore A23187 and ionomycin. The rate of acrosome reaction induced by ionomycin is higher (95.8%) than A23187 (58.7%). Morphological changes were observed using light, confocal and transmission electron microscopy. Further more, proteins released during the acrosome reaction as induced by ionomycin were collected for LC-MS/MS analysis. A total of 945 proteins, including malate dehydrogenase (MDH) and voltage-dependent anion channel 3 (VDAC3), were identified in the acrosomal released proteome. The number of proteins from mitochondria (17.57%) was higher compared with endoplasmic reituculum (1.59%) and lysosomes (1.8%). To investigate the functions of target mitochondrial proteins during spermatogenesis, poly-antibodies of MDH in E. sinensis were prepared. The characteristics, further analyzed using immunofluorescence, of two mitochondrial proteins during acrosome formation showed that MDH and VDAC3 were independently involved in the formation of acrosomal membrane. These findings illustrate the acrosomal released proteome and provide important data resource for understanding the relationship between mitochondria and the acrosome in Decapoda crustacean.
Collapse
Affiliation(s)
- Chao Li
- College of Life Science in Hebei University, Baoding, China; Institute of Life Science and Green Development, Hebei University, Baoding 071000, China
| | - Ruifang Yu
- College of Life Science in Hebei University, Baoding, China
| | - Huan Liu
- College of Life Science in Hebei University, Baoding, China
| | - Jiashan Qiao
- College of Life Science in Hebei University, Baoding, China
| | - Fenghao Zhang
- College of Life Science in Hebei University, Baoding, China
| | - Shumei Mu
- College of Life Science in Hebei University, Baoding, China; Institute of Life Science and Green Development, Hebei University, Baoding 071000, China
| | - Mingshen Guo
- College of Life Science in Hebei University, Baoding, China; Institute of Life Science and Green Development, Hebei University, Baoding 071000, China
| | - Han Zhang
- College of Life Science in Hebei University, Baoding, China; Institute of Life Science and Green Development, Hebei University, Baoding 071000, China
| | - Yanqin Li
- College of Life Science in Hebei University, Baoding, China; Institute of Life Science and Green Development, Hebei University, Baoding 071000, China
| | - Xianjiang Kang
- College of Life Science in Hebei University, Baoding, China; Institute of Life Science and Green Development, Hebei University, Baoding 071000, China; Hebei Province Innovation Center for Bioengineering and Biotechnology, Hebei University, Baoding 071000, China.
| |
Collapse
|
3
|
Islam MM, Umehara T, Tsujita N, Koyago M, Shimada M. Treatment with cholesterol just after thawing maintains the fertility of bull sperm. Mol Hum Reprod 2023; 29:gaad031. [PMID: 37656939 PMCID: PMC10502238 DOI: 10.1093/molehr/gaad031] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2023] [Revised: 07/01/2023] [Indexed: 09/03/2023] Open
Abstract
Freezing and thawing diminish sperm motility and fertility by disrupting the cholesterol balance in sperm plasma and organelle membranes. The aim of this study was to elucidate the mechanisms through which exogeneous cholesterol treatment enhances the quality of frozen-thawed bull sperm. The incorporation of cholesterol was investigated using boron-dipyrromethene (BODIPY)-cholesterol, and BODIPY signals were detected not only in the plasma membrane but also in the midpiece region immediately after thawing. The positive signal of cholesterol in the midpiece region was inhibited by a scavenger receptor class B Type I (SR-BI) inhibitor, block lipid transport 1 (BLT-1). To comprehend the role of exogenous cholesterol in the functions of the plasma membrane, propidium iodide (PI)/Annexin V and peanut agglutinin lectin (PNA) staining were performed. The results showed that treatment with exogenous cholesterol increased the number of acrosome-intact sperm and decreased the number of sperm with damage to the plasma membrane. Moreover, since BODIPY signals were also observed in the midpiece region, mitochondrial function was evaluated using a flux analyzer and a flow cytometer with 5,5',6,6'-tetrachloro-1,1',3,3'-tetraethylbenzimidazolyl carbocyanine iodide (JC-1) staining, revealing an increase in the number of sperm with high-mitochondrial activity and oxygen consumption. Finally, to assess sperm fertility, computer-assisted sperm analysis (CASA) and IVF were carried out. Sperm velocities and fertilization rates in IVF were significantly enhanced by the addition of cholesterol just after thawing. Thus, the treatment with cholesterol after thawing protected the plasma membrane from the stress of thawing and maintained mitochondrial function, thereby preserving the fertilization ability of frozen-thawed bull sperm for conventional IVF and artificial insemination (AI). Therefore, the application of cholesterol just after thawing is a promising option for improving the fertility of frozen-thawed sperm.
Collapse
Affiliation(s)
- Md Mazharul Islam
- Laboratory of Reproductive Endocrinology, Department of Bioresource Science, Graduate School of Biosphere Science, Hiroshima University, Higashi-Hiroshima, Hiroshima, Japan
- Department of Animal Breeding and Genetics, Bangabandhu Sheikh Mujibur Rahman Agricultural University, Gazipur, Bangladesh
| | - Takashi Umehara
- Laboratory of Reproductive Endocrinology, Department of Bioresource Science, Graduate School of Biosphere Science, Hiroshima University, Higashi-Hiroshima, Hiroshima, Japan
- Graduate School of Integrated Sciences for Life, Hiroshima University, Higashi-Hiroshima, Hiroshima, Japan
| | - Natsumi Tsujita
- Graduate School of Integrated Sciences for Life, Hiroshima University, Higashi-Hiroshima, Hiroshima, Japan
| | - Masanori Koyago
- Graduate School of Integrated Sciences for Life, Hiroshima University, Higashi-Hiroshima, Hiroshima, Japan
- Livestock Improvement Association of Japan Inc., Tokyo, Japan
| | - Masayuki Shimada
- Laboratory of Reproductive Endocrinology, Department of Bioresource Science, Graduate School of Biosphere Science, Hiroshima University, Higashi-Hiroshima, Hiroshima, Japan
- Graduate School of Integrated Sciences for Life, Hiroshima University, Higashi-Hiroshima, Hiroshima, Japan
| |
Collapse
|
4
|
Bilekova S, Garcia-Colomer B, Cebrian-Serrano A, Schirge S, Krey K, Sterr M, Kurth T, Hauck SM, Lickert H. Inceptor facilitates acrosomal vesicle formation in spermatids and is required for male fertility. Front Cell Dev Biol 2023; 11:1240039. [PMID: 37691832 PMCID: PMC10483240 DOI: 10.3389/fcell.2023.1240039] [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: 06/14/2023] [Accepted: 08/07/2023] [Indexed: 09/12/2023] Open
Abstract
Spermatogenesis is a crucial biological process that enables the production of functional sperm, allowing for successful reproduction. Proper germ cell differentiation and maturation require tight regulation of hormonal signals, cellular signaling pathways, and cell biological processes. The acrosome is a lysosome-related organelle at the anterior of the sperm head that contains enzymes and receptors essential for egg-sperm recognition and fusion. Even though several factors crucial for acrosome biogenesis have been discovered, the precise molecular mechanism of pro-acrosomal vesicle formation and fusion is not yet known. In this study, we investigated the role of the insulin inhibitory receptor (inceptor) in acrosome formation. Inceptor is a single-pass transmembrane protein with similarities to mannose-6-phosphate receptors (M6PR). Inceptor knockout male mice are infertile due to malformations in the acrosome and defects in the nuclear shape of spermatozoa. We show that inceptor is expressed in early spermatids and mainly localizes to vesicles between the Golgi apparatus and acrosome. Here we show that inceptor is an essential factor in the intracellular transport of trans-Golgi network-derived vesicles which deliver acrosomal cargo in maturing spermatids. The absence of inceptor results in vesicle-fusion defects, acrosomal malformation, and male infertility. These findings support our hypothesis of inceptor as a universal lysosomal or lysosome-related organelle sorting receptor expressed in several secretory tissues.
Collapse
Affiliation(s)
- Sara Bilekova
- Helmholtz Center Munich, German Research Center for Environmental Health GmbH, Institute of Diabetes and Regeneration Research, Neuherberg, Germany
- German Center for Diabetes Research (DZD), Neuherberg, Germany
- School of Medicine, Technical University of Munich, Munich, Germany
| | - Balma Garcia-Colomer
- German Center for Diabetes Research (DZD), Neuherberg, Germany
- Helmholtz Center Munich, Institute for Diabetes and Obesity, Neuherberg, Germany
| | - Alberto Cebrian-Serrano
- German Center for Diabetes Research (DZD), Neuherberg, Germany
- Helmholtz Center Munich, Institute for Diabetes and Obesity, Neuherberg, Germany
| | - Silvia Schirge
- Helmholtz Center Munich, German Research Center for Environmental Health GmbH, Institute of Diabetes and Regeneration Research, Neuherberg, Germany
- German Center for Diabetes Research (DZD), Neuherberg, Germany
| | - Karsten Krey
- School of Medicine, Technical University of Munich, Munich, Germany
- Institute of Virology, Technical University of Munich, Munich, Germany
| | - Michael Sterr
- Helmholtz Center Munich, German Research Center for Environmental Health GmbH, Institute of Diabetes and Regeneration Research, Neuherberg, Germany
- German Center for Diabetes Research (DZD), Neuherberg, Germany
| | - Thomas Kurth
- Center for Molecular and Cellular Bioengineering (CMCB), Technology Platform, Core Facility Electron Microscopy and Histology, Dresden University of Technology, Dresden, Germany
| | - Stefanie M. Hauck
- German Center for Diabetes Research (DZD), Neuherberg, Germany
- Metabolomics and Proteomics Core, Helmholtz Center Munich, German Research Center for Environmental Health GmbH, Munich, Germany
| | - Heiko Lickert
- Helmholtz Center Munich, German Research Center for Environmental Health GmbH, Institute of Diabetes and Regeneration Research, Neuherberg, Germany
- German Center for Diabetes Research (DZD), Neuherberg, Germany
- School of Medicine, Technical University of Munich, Munich, Germany
| |
Collapse
|
5
|
Oliver EI, Jabloñski M, Buffone MG, Darszon A. Two-pore channel 1 and Ca 2+ release-activated Ca 2+ channels contribute to the acrosomal pH-dependent intracellular Ca 2+ increase in mouse sperm. J Physiol 2023; 601:2935-2958. [PMID: 37278367 DOI: 10.1113/jp284247] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2022] [Accepted: 05/16/2023] [Indexed: 06/07/2023] Open
Abstract
The acrosome is a lysosome-related vesicular organelle located in the sperm head. The acrosomal reaction (AR) is an exocytic process mediated by Ca2+ and essential for mammalian fertilization. Recent findings support the importance of acrosomal alkalinization for the AR. Mibefradil (Mib) and NNC 55-0396 (NNC) are two amphipathic weak bases that block the sperm-specific Ca2+ channel (CatSper) and induce acrosomal pH (pHa ) increase by accumulating in the acrosomal lumen of mammalian sperm. This accumulation and pHa elevation increase the intracellular Ca2+ concentration ([Ca2+ ]i ) and trigger the AR by unknown mechanisms of Ca2+ transport. Here, we investigated the pathways associated with the pHa increase-induced Ca2+ signals using mouse sperm as a model. To address these questions, we used single-cell Ca2+ imaging, the lysosomotropic agent Gly-Phe-β-naphthylamide (GPN) and pharmacological tools. Our findings show that Mib and NNC increase pHa and release acrosomal Ca2+ without compromising acrosomal membrane integrity. Our GPN results indicate that the osmotic component does not significantly contribute to acrosomal Ca2+ release caused by pHa rise. Inhibition of two-pore channel 1 (TPC1) channels reduced the [Ca2+ ]i increase stimulated by acrosomal alkalinization. In addition, blockage of Ca2+ release-activated Ca2+ (CRAC) channels diminished Ca2+ uptake triggered by pHa alkalinization. Finally, our findings contribute to understanding how pHa controls acrosomal Ca2+ efflux and extracellular Ca2+ entry during AR in mouse sperm. KEY POINTS: The acrosomal vesicle is a lysosome-related organelle located in the sperm head. The acrosome reaction (AR) is a highly regulated exocytic process mediated by Ca2+ , which is essential for fertilization. However, the molecular identity of Ca2+ transporters involved in the AR and their mechanisms to regulate Ca2+ fluxes are not fully understood. In mammalian sperm, acrosomal alkalinization induces intracellular Ca2+ concentration ([Ca2+ ]i ) increase and triggers the AR by unknown molecular mechanisms of Ca2+ transport. In this study, we explored the molecular mechanisms underlying Ca2+ signals caused by acrosomal alkalinization using mouse sperm as a model. TPC1 and CRAC channels contribute to [Ca2+ ]i elevation during acrosomal alkalinization. Our findings expand our understanding of how the acrosomal pH participates in the physiological induction of the AR.
Collapse
Affiliation(s)
- Enrique I Oliver
- Departamento de Genética del Desarrollo y Fisiología Molecular, Instituto de Biotecnología, Universidad Autónoma de México, Cuernavaca, Morelos, México
- Centro de Investigación en Dinámica Celular, Instituto de Investigación en Ciencias Básicas y Aplicadas, Universidad Autónoma del Estado de Morelos, Cuernavaca, Morelos, México
| | - Martina Jabloñski
- Instituto de Biología y Medicina Experimental, Consejo Nacional de Investigaciones Científicas y Técnicas (IBYME-CONICET), Buenos Aires, Argentina
| | - Mariano G Buffone
- Instituto de Biología y Medicina Experimental, Consejo Nacional de Investigaciones Científicas y Técnicas (IBYME-CONICET), Buenos Aires, Argentina
| | - Alberto Darszon
- Departamento de Genética del Desarrollo y Fisiología Molecular, Instituto de Biotecnología, Universidad Autónoma de México, Cuernavaca, Morelos, México
| |
Collapse
|
6
|
Ding Z, Xiong L, Wang X, Guo S, Cao M, Kang Y, La Y, Bao P, Pei J, Guo X. Comparative Analysis of Epididymis Cauda of Yak before and after Sexual Maturity. Animals (Basel) 2023; 13:ani13081355. [PMID: 37106918 PMCID: PMC10135020 DOI: 10.3390/ani13081355] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2023] [Revised: 04/08/2023] [Accepted: 04/13/2023] [Indexed: 04/29/2023] Open
Abstract
Epididymis development is the basis of male reproduction and is a crucial site where sperm maturation occurs. In order to further understand the epididymal development of yak and how to regulate sperm maturation, we conducted a multi-omics analysis. We detected 2274 differential genes, 222 differential proteins and 117 co-expression genes in the cauda epididymis of yak before and after sexual maturity by RNA-seq and proteomics techniques, which included TGFBI, COL1A1, COL1A2, COL3A1, COL12A1, SULT2B1, KRT19, and NPC2. These high abundance genes are mainly related to cell growth, differentiation, adhesion and sperm maturation, and are mainly enriched via extracellular matrix receptor interaction, protein differentiation and absorption, and lysosome and estrogen signaling pathways. The abnormal expression of these genes may lead to the retardation of epididymal cauda development and abnormal sperm function in yak. In conclusion, through single and combined analysis, we provided a theoretical basis for the development of the yak epididymal cauda, sperm maturation, and screening of key genes involved in the regulation of male yak reproduction.
Collapse
Affiliation(s)
- Ziqiang Ding
- Key Laboratory of Yak Breeding Engineering of Gansu Province, Lanzhou Institute of Husbandry and Pharmaceutical Sciences, Chinese Academy of Agricultural Sciences, Lanzhou 730050, China
- Key Laboratory of Animal Genetics and Breeding on Tibetan Plateau, Ministry of Agriculture and Rural Affairs, Lanzhou 730050, China
| | - Lin Xiong
- Key Laboratory of Yak Breeding Engineering of Gansu Province, Lanzhou Institute of Husbandry and Pharmaceutical Sciences, Chinese Academy of Agricultural Sciences, Lanzhou 730050, China
- Key Laboratory of Animal Genetics and Breeding on Tibetan Plateau, Ministry of Agriculture and Rural Affairs, Lanzhou 730050, China
| | - Xingdong Wang
- Key Laboratory of Yak Breeding Engineering of Gansu Province, Lanzhou Institute of Husbandry and Pharmaceutical Sciences, Chinese Academy of Agricultural Sciences, Lanzhou 730050, China
- Key Laboratory of Animal Genetics and Breeding on Tibetan Plateau, Ministry of Agriculture and Rural Affairs, Lanzhou 730050, China
| | - Shaoke Guo
- Key Laboratory of Yak Breeding Engineering of Gansu Province, Lanzhou Institute of Husbandry and Pharmaceutical Sciences, Chinese Academy of Agricultural Sciences, Lanzhou 730050, China
- Key Laboratory of Animal Genetics and Breeding on Tibetan Plateau, Ministry of Agriculture and Rural Affairs, Lanzhou 730050, China
| | - Mengli Cao
- Key Laboratory of Yak Breeding Engineering of Gansu Province, Lanzhou Institute of Husbandry and Pharmaceutical Sciences, Chinese Academy of Agricultural Sciences, Lanzhou 730050, China
- Key Laboratory of Animal Genetics and Breeding on Tibetan Plateau, Ministry of Agriculture and Rural Affairs, Lanzhou 730050, China
| | - Yandong Kang
- Key Laboratory of Yak Breeding Engineering of Gansu Province, Lanzhou Institute of Husbandry and Pharmaceutical Sciences, Chinese Academy of Agricultural Sciences, Lanzhou 730050, China
- Key Laboratory of Animal Genetics and Breeding on Tibetan Plateau, Ministry of Agriculture and Rural Affairs, Lanzhou 730050, China
| | - Yongfu La
- Key Laboratory of Yak Breeding Engineering of Gansu Province, Lanzhou Institute of Husbandry and Pharmaceutical Sciences, Chinese Academy of Agricultural Sciences, Lanzhou 730050, China
- Key Laboratory of Animal Genetics and Breeding on Tibetan Plateau, Ministry of Agriculture and Rural Affairs, Lanzhou 730050, China
| | - Pengjia Bao
- Key Laboratory of Yak Breeding Engineering of Gansu Province, Lanzhou Institute of Husbandry and Pharmaceutical Sciences, Chinese Academy of Agricultural Sciences, Lanzhou 730050, China
- Key Laboratory of Animal Genetics and Breeding on Tibetan Plateau, Ministry of Agriculture and Rural Affairs, Lanzhou 730050, China
| | - Jie Pei
- Key Laboratory of Yak Breeding Engineering of Gansu Province, Lanzhou Institute of Husbandry and Pharmaceutical Sciences, Chinese Academy of Agricultural Sciences, Lanzhou 730050, China
- Key Laboratory of Animal Genetics and Breeding on Tibetan Plateau, Ministry of Agriculture and Rural Affairs, Lanzhou 730050, China
| | - Xian Guo
- Key Laboratory of Yak Breeding Engineering of Gansu Province, Lanzhou Institute of Husbandry and Pharmaceutical Sciences, Chinese Academy of Agricultural Sciences, Lanzhou 730050, China
- Key Laboratory of Animal Genetics and Breeding on Tibetan Plateau, Ministry of Agriculture and Rural Affairs, Lanzhou 730050, China
| |
Collapse
|
7
|
Malathion exposure during juvenile and peripubertal periods downregulate androgen receptor and 17-ß-HSD testicular gene expression and compromised sperm quality in rats. J Dev Orig Health Dis 2023; 14:286-293. [PMID: 36336997 DOI: 10.1017/s2040174422000599] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Malathion is an insecticide that is used to control arboviruses and agricultural pests. Adolescents that are exposed to this insecticide are the most vulnerable as they are in the critical period of postnatal sexual development. This study aimed to evaluate whether malathion damage can affect sperm function and its respective mechanisms when adolescents are exposed during postnatal sexual development. Twenty-four male Wistar rats (PND 25) were divided into three experimental groups and treated daily for 40 d: control group (saline 0.9%), 10 mg/kg (M10 group), or 50 mg/kg (M50 group) of malathion. At PND 65, the rats were anesthetized and euthanized. Testicles were collected for the evaluation of gene expression. Sperm cells from the epididymis were used for evaluation of the oxidative profile or spermatic function. Data showed that a lower dose of malathion downregulated the gene expression of androgen receptors and testosterone converter enzyme 17-β-HSD in the testis. The acrosomal integrity of sperm cells was compromised in the M50 group, but not the M10 group. The mitochondrial activity was not impaired by exposure. Finally, although no alterations in malondialdehyde and glutathione levels were observed, malathion, at both doses, increased antioxidant enzyme catalase activity and, at a higher dose, superoxide dismutase activity. The present study showed that low doses of malathion considered to be inoffensive are capable of impairing sperm quality and function through the downregulation of testicular genic expression of AR enzyme 17-β-HSD and can damage the spermatic antioxidant profile during critical periods of development.
Collapse
|
8
|
Du Y, Chang W, Gao L, Deng L, Ji WK. Tex2 is required for lysosomal functions at TMEM55-dependent ER membrane contact sites. J Cell Biol 2023; 222:213838. [PMID: 36705603 PMCID: PMC9930140 DOI: 10.1083/jcb.202205133] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2022] [Revised: 10/17/2022] [Accepted: 01/05/2023] [Indexed: 01/28/2023] Open
Abstract
ER tubules form and maintain membrane contact sites (MCSs) with late endosomes/lysosomes (LE/lys). The molecular composition and cellular functions of these MCSs are poorly understood. Here, we find that Tex2, an SMP domain-containing lipid transfer protein conserved in metazoan and yeast, is a tubular ER protein and is recruited to ER-LE/lys MCSs by TMEM55, phosphatases that convert PI(4,5)P2 to PI5P on LE/lys. We show that the Tex2-TMEM55 interaction occurs between an N-terminal region of Tex2 and a catalytic motif in the PTase domain of TMEM55. The Tex2-TMEM55 interaction can be regulated by endosome-resident type 2 PI4K activities. Functionally, Tex2 knockout results in defects in lysosomal trafficking, digestive capacity, and lipid composition of LE/lys membranes. Together, our data identify Tex2 as a tubular ER protein that resides at TMEM55-dependent ER-LE/lys MCSs required for lysosomal functions.
Collapse
Affiliation(s)
- Yuanjiao Du
- Department of Biochemistry and Molecular Biology, School of Basic Medicine, Tongji Medical College, Wuhan, China,https://ror.org/00p991c53Cell Architecture Research Center, Huazhong University of Science and Technology, Wuhan, Hubei, China,https://ror.org/00sdcjz77Shenzhen Bay Laboratory, Shenzhen, China
| | - Weiping Chang
- https://ror.org/00sdcjz77Shenzhen Bay Laboratory, Shenzhen, China
| | - Lei Gao
- https://ror.org/05hfa4n20Microscopy Core Facility, Westlake University, Hangzhou, Zhejiang, China
| | - Lin Deng
- https://ror.org/00sdcjz77Shenzhen Bay Laboratory, Shenzhen, China
| | - Wei-Ke Ji
- Department of Biochemistry and Molecular Biology, School of Basic Medicine, Tongji Medical College, Wuhan, China,https://ror.org/00p991c53Cell Architecture Research Center, Huazhong University of Science and Technology, Wuhan, Hubei, China,https://ror.org/00sdcjz77Shenzhen Bay Laboratory, Shenzhen, China,Correspondence to Wei-Ke Ji:
| |
Collapse
|
9
|
The stallion sperm acrosome: Considerations from a research and clinical perspective. Theriogenology 2023; 196:121-149. [PMID: 36413868 DOI: 10.1016/j.theriogenology.2022.11.012] [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: 08/30/2022] [Revised: 11/02/2022] [Accepted: 11/07/2022] [Indexed: 11/16/2022]
Abstract
During the fertilization process, the interaction between the sperm and the oocyte is mediated by a process known as acrosomal exocytosis (AE). Although the role of the sperm acrosome on fertilization has been studied extensively over the last 70 years, little is known about the molecular mechanisms that govern acrosomal function, particularly in species other than mice or humans. Even though subfertility due to acrosomal dysfunction is less common in large animals than in humans, the evaluation of sperm acrosomal function should be considered not only as a complementary but a routine test when individuals are selected for breeding potential. This certainly holds true for stallions, which might display lower levels of fertility in the face of "acceptable" sperm quality parameters determined by conventional sperm assays. Nowadays, the use of high throughput technologies such as flow cytometry or mass spectrometry-based proteomic analysis is commonplace in the research arena. Such techniques can also be implemented in clinical scenarios of males with "idiopathic" subfertility. The current review focuses on the sperm acrosome, with particular emphasis on the stallion. We aim to describe the physiological events that lead to the acrosome formation within the testis, the role of very specific acrosomal proteins during AE, the methods to study the occurrence of AE under in vitro conditions, and the potential use of molecular biology techniques to discover new markers of acrosomal function and subfertility associated with acrosomal dysfunction in stallions.
Collapse
|
10
|
Aparicio IM, Rojo-Domínguez P, Castillejo-Rufo A, Peña FJ, Tapia JA. The Autophagy Marker LC3 Is Processed during the Sperm Capacitation and the Acrosome Reaction and Translocates to the Acrosome Where It Colocalizes with the Acrosomal Membranes in Horse Spermatozoa. Int J Mol Sci 2023; 24:ijms24020937. [PMID: 36674454 PMCID: PMC9862423 DOI: 10.3390/ijms24020937] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2022] [Revised: 12/25/2022] [Accepted: 01/01/2023] [Indexed: 01/06/2023] Open
Abstract
Despite its importance in somatic cells and during spermatogenesis, little is known about the role that autophagy may play in ejaculated spermatozoa. Our aim was to investigate whether the molecular components of autophagy, such as microtubule-associated protein 1 light chain 3 (LC3), are activated in stallion spermatozoa during the capacitation and acrosome reaction and if this activation could modulate these biological processes. To analyze the autophagy turnover, LC3I and LC3II proteins were assessed by western blotting, and the ratio between both proteins (LC3II/LC3I) was calculated. In somatic cells, this ratio indicates that autophagy has been activated and similar LC3 processing has been described in mammalian spermatozoa. The subcellular localization of autophagy-related proteins was assessed by immunofluorescence with specific antibodies that recognized Atg16, Beclin-1, and LC3. The colocalization of acrosomal membranes (PNA) and LC3 was studied by confocal microcopy, and the acrosome reacted cells were quantified by flow cytometry. The incubation of stallion sperm in capacitating conditions (BWW; 3 h) significantly increased LC3 processing. This increment was three to four times higher after the induction of the acrosome reaction in these cells. LC3 was mainly expressed in the head in mature ejaculated sperm showing a clear redistribution from the post-acrosomal region to the acrosome upon the incubation of sperm in capacitating conditions (BWW, 3 h). After the induction of the acrosome reaction, LC3 colocalized with the acrosome or the apical plasmalemma membranes in the head of the stallion spermatozoa. The inhibition or activation of autophagy-related pathways in the presence of autophagy activators (STF-62247) or inhibitors (E-64d, chloroquine) significantly increased LC3 processing and increased the percent of acrosome reacted cells, whereas 3-methyladenine almost completely inhibited LC3 processing and the acrosome reaction. In conclusion, we found that sperm capacitation and acrosome reaction could be regulated by autophagy components in sperm cells ex vivo by processes that might be independent of the intraluminal pH of the acrosome and dependent of LC3 lipidation. It can be speculated that, in stallion sperm, a form of noncanonical autophagy utilizes some components of autophagy machinery to facilitate the acrosome reaction.
Collapse
Affiliation(s)
- Ines M. Aparicio
- Department of Physiology, Institute of Molecular Pathology Biomarkers (BICOMCEL), University of Extremadura, 10003 Cáceres, Spain
| | - Patricia Rojo-Domínguez
- Laboratory of Spermatology, Veterinary Teaching Hospital, University of Extremadura, 10003 Cáceres, Spain
| | - Alba Castillejo-Rufo
- Department of Physiology, Institute of Molecular Pathology Biomarkers (BICOMCEL), University of Extremadura, 10003 Cáceres, Spain
| | - Fernando J. Peña
- Laboratory of Spermatology, Veterinary Teaching Hospital, University of Extremadura, 10003 Cáceres, Spain
| | - Jose A. Tapia
- Department of Physiology, Institute of Molecular Pathology Biomarkers (BICOMCEL), University of Extremadura, 10003 Cáceres, Spain
- Correspondence:
| |
Collapse
|
11
|
Mega OO, Edesiri TP, Victor E, Kingsley NE, Rume RA, Faith FY, Simon OI, Oghenetega BO, Agbonifo-Chijiokwu E. d-ribose- l-cysteine abrogates testicular maladaptive responses induced by polychlorinated bisphenol intoxication in rats via activation of the mTOR signaling pathway mediating inhibition of apoptosis, inflammation, and oxidonitrergic flux. J Biochem Mol Toxicol 2022; 36:e23161. [PMID: 35822628 DOI: 10.1002/jbt.23161] [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: 12/13/2021] [Revised: 04/12/2022] [Accepted: 07/01/2022] [Indexed: 11/06/2022]
Abstract
Male reproductive maladaptive responses are becoming a global health concern and also a social issue. Polychlorinated biphenyls (PCBs) are a member of halogenated aromatic environmental pollutants with diverse environmental matrices. This study was conducted to explore the mechanisms of PCBs-induced testicular maladaptive responses and the potential reversal effects of d-ribose- l-cysteine (DRLC) on testicular injury induced by administration of PCBs (2 mg/kg) for 30 days. DRLC (50 mg/kg) was administered orally for 15 days starting from Days 16 to 30 after the initial 15 days of treatment with PCB. All assays were carried out using established protocols. Administration of DRLC at 50 mg/kg after treatment with PCBs enhances body and testicular weights, gonadotropins (luteinizing hormone and follicle-stimulating hormone), testosterone and poor sperm quality. DRLC also reduced testicular injury score, improved spermatogenesis scoring, reduced oxidative stress biomarkers (malondialdehyde), as well as restored the reduced activities of antioxidant enzymes (glutathione peroxidase, superoxide dismutase, and catalase) and decreases pro-inflammatory response (tumor necrosis factor-alpha and NO). More so, DRLC treatment abrogates testicular DNA fragmentation and downregulated p53 and caspase 3 activities and upregulated the concentration of autophagy-related protein (mammalian target of rapamycin [mTOR] and Atg7). DRLC abates testicular deficit induced by PCBs intoxicated rats via activation of the mTOR signaling pathway mediating inhibition of apoptosis, Inflammation and oxidative flux.
Collapse
Affiliation(s)
- Oyovwi O Mega
- Department of Hunan Physiology, Achievers University, Owo, Ondo State, Nigeria
| | - Tesi P Edesiri
- Department of Science Laboratory Technology, Delta State Polytechnic, Ogwashi-Uku, Delta State, Nigeria
| | - Emojevwe Victor
- Department of Physiology, University of Medical Sciences, Ondo, Ondo State, Nigeria
| | - Nwangwan E Kingsley
- Department of Pharmacology, Faculty of Basic Medical Science, College of Health Sciences, Delta State University, Abraka, Delta State, Nigeria
| | - Rotu A Rume
- Department of Physiology, Faculty of Basic Medical Science, Babcock University, Illisan-Romo, Ogun State, Nigeria
| | - Falajiki Y Faith
- Department of Hunan Physiology, Achievers University, Owo, Ondo State, Nigeria
| | - Ovuakporaye I Simon
- Department of Pharmacology, Faculty of Basic Medical Science, College of Health Sciences, Delta State University, Abraka, Delta State, Nigeria
| | - Bright O Oghenetega
- Department of Physiology, Faculty of Basic Medical Science, Babcock University, Illisan-Romo, Ogun State, Nigeria
| | - Ejime Agbonifo-Chijiokwu
- Department of Pharmacology, Faculty of Basic Medical Science, College of Health Sciences, Delta State University, Abraka, Delta State, Nigeria
| |
Collapse
|
12
|
Umer N, Arévalo L, Phadke S, Lohanadan K, Kirfel G, Sons D, Sofia D, Witke W, Schorle H. Loss of Profilin3 Impairs Spermiogenesis by Affecting Acrosome Biogenesis, Autophagy, Manchette Development and Mitochondrial Organization. Front Cell Dev Biol 2021; 9:749559. [PMID: 34869336 PMCID: PMC8632698 DOI: 10.3389/fcell.2021.749559] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2021] [Accepted: 09/28/2021] [Indexed: 11/28/2022] Open
Abstract
Profilins (PFNs) are key regulatory proteins for the actin polymerization in cells and are encoded in mouse and humans by four Pfn genes. PFNs are involved in cell mobility, cell growth, neurogenesis, and metastasis of tumor cells. The testes-specific PFN3 is localized in the acroplaxome-manchette complex of developing spermatozoa. We demonstrate that PFN3 further localizes in the Golgi complex and proacrosomal vesicles during spermiogenesis, suggesting a role in vesicle transport for acrosome formation. Using CRISPR/Cas9 genome editing, we generated mice deficient for Pfn3. Pfn3-/- males are subfertile, displaying a type II globozoospermia. We revealed that Pfn3-/- sperm display abnormal manchette development leading to an amorphous sperm head shape. Additionally, Pfn3-/- sperm showed reduced sperm motility resulting from flagellum deformities. We show that acrosome biogenesis is impaired starting from the Golgi phase, and mature sperm seems to suffer from a cytoplasm removal defect. An RNA-seq analysis revealed an upregulation of Trim27 and downregulation of Atg2a. As a consequence, mTOR was activated and AMPK was suppressed, resulting in the inhibition of autophagy. This dysregulation of AMPK/mTOR affected the autophagic flux, which is hallmarked by LC3B accumulation and increased SQSTM1 protein levels. Autophagy is involved in proacrosomal vesicle fusion and transport to form the acrosome. We conclude that this disruption leads to the observed malformation of the acrosome. TRIM27 is associated with PFN3 as determined by co-immunoprecipitation from testis extracts. Further, actin-related protein ARPM1 was absent in the nuclear fraction of Pfn3-/- testes and sperm. This suggests that lack of PFN3 leads to destabilization of the PFN3-ARPM1 complex, resulting in the degradation of ARPM1. Interestingly, in the Pfn3-/- testes, we detected increased protein levels of essential actin regulatory proteins, cofilin-1 (CFL1), cofilin-2 (CFL2), and actin depolymerizing factor (ADF). Taken together, our results reveal the importance for PFN3 in male fertility and implicate this protein as a candidate for male factor infertility in humans.
Collapse
Affiliation(s)
- Naila Umer
- Department of Developmental Pathology, Institute of Pathology, University Hospital Bonn, Bonn, Germany
| | - Lena Arévalo
- Department of Developmental Pathology, Institute of Pathology, University Hospital Bonn, Bonn, Germany
| | - Sharang Phadke
- Department of Developmental Pathology, Institute of Pathology, University Hospital Bonn, Bonn, Germany
| | | | - Gregor Kirfel
- Institute for Cell Biology, University of Bonn, Bonn, Germany
| | - Dominik Sons
- Department of Membrane Biochemistry, Life and Medical Sciences (LIMES) Institute, University of Bonn, Bonn, Germany
| | - Denise Sofia
- Institute of Genetics, University of Bonn, Bonn, Germany
| | - Walter Witke
- Institute of Genetics, University of Bonn, Bonn, Germany
| | - Hubert Schorle
- Department of Developmental Pathology, Institute of Pathology, University Hospital Bonn, Bonn, Germany
| |
Collapse
|
13
|
Tobisawa Y, Fujita N, Yamamoto H, Ohyama C, Irie F, Yamaguchi Y. The cell surface hyaluronidase TMEM2 is essential for systemic hyaluronan catabolism and turnover. J Biol Chem 2021; 297:101281. [PMID: 34624311 PMCID: PMC8561002 DOI: 10.1016/j.jbc.2021.101281] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2021] [Revised: 09/30/2021] [Accepted: 10/01/2021] [Indexed: 11/26/2022] Open
Abstract
As a major component of the extracellular matrix, hyaluronan (HA) plays an important role in defining the biochemical and biophysical properties of tissues. In light of the extremely rapid turnover of HA and the impact of this turnover on HA biology, elucidating the molecular mechanisms underlying HA catabolism is key to understanding the in vivo functions of this unique polysaccharide. Here, we show that TMEM2, a recently identified cell surface hyaluronidase, plays an essential role in systemic HA turnover. Employing induced global Tmem2 knockout mice (Tmem2iKO), we determined the effects of Tmem2 ablation not only on the accumulation of HA in bodily fluids and organs, but also on the process of HA degradation in vivo. Within 3 weeks of tamoxifen-induced Tmem2 ablation, Tmem2iKO mice exhibit pronounced accumulation of HA in circulating blood and various organs, reaching levels as high as 40-fold above levels observed in control mice. Experiments using lymphatic and vascular injection of fluorescent HA tracers demonstrate that ongoing HA degradation in the lymphatic system and the liver is significantly impaired in Tmem2iKO mice. We also show that Tmem2 is strongly expressed in endothelial cells in the subcapsular sinus of lymph nodes and in the liver sinusoid, two primary sites implicated in systemic HA turnover. Our results establish TMEM2 as a physiologically relevant hyaluronidase with an essential role in systemic HA catabolism in vivo, acting primarily on the surface of endothelial cells in the lymph nodes and liver.
Collapse
Affiliation(s)
- Yuki Tobisawa
- Human Genetics Program, Sanford Burnham Prebys Medical Discovery Institute, La Jolla, California, USA
| | - Naoki Fujita
- Human Genetics Program, Sanford Burnham Prebys Medical Discovery Institute, La Jolla, California, USA
| | - Hayato Yamamoto
- Human Genetics Program, Sanford Burnham Prebys Medical Discovery Institute, La Jolla, California, USA; Department of Urology, Hirosaki University Graduate School of Medicine, Hirosaki, Japan
| | - Chikara Ohyama
- Department of Urology, Hirosaki University Graduate School of Medicine, Hirosaki, Japan
| | - Fumitoshi Irie
- Human Genetics Program, Sanford Burnham Prebys Medical Discovery Institute, La Jolla, California, USA
| | - Yu Yamaguchi
- Human Genetics Program, Sanford Burnham Prebys Medical Discovery Institute, La Jolla, California, USA.
| |
Collapse
|
14
|
Morohoshi A, Miyata H, Oyama Y, Oura S, Noda T, Ikawa M. FAM71F1 binds to RAB2A and RAB2B and is essential for acrosome formation and male fertility in mice. Development 2021; 148:dev199644. [PMID: 34714330 PMCID: PMC8602946 DOI: 10.1242/dev.199644] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2021] [Accepted: 09/22/2021] [Indexed: 11/20/2022]
Abstract
The acrosome is a cap-shaped, Golgi-derived membranous organelle that is located over the anterior of the sperm nucleus and highly conserved throughout evolution. Although morphological changes during acrosome biogenesis in spermatogenesis have been well described, the molecular mechanism underlying this process is still largely unknown. Family with sequence similarity 71, member F1 and F2 (FAM71F1 and FAM71F2) are testis-enriched proteins that contain a RAB2B-binding domain, a small GTPase involved in vesicle transport and membrane trafficking. Here, by generating mutant mice for each gene, we found that Fam71f1 is essential for male fertility. In Fam71f1-mutant mice, the acrosome was abnormally expanded at the round spermatid stage, likely because of enhanced vesicle trafficking. Mass spectrometry analysis after immunoprecipitation indicated that, in testes, FAM71F1 binds not only RAB2B, but also RAB2A. Further study suggested that FAM71F1 binds to the GTP-bound active form of RAB2A/B, but not the inactive form. These results indicate that a complex of FAM71F1 and active RAB2A/B suppresses excessive vesicle trafficking during acrosome formation.
Collapse
Affiliation(s)
- Akane Morohoshi
- Department of Experimental Genome Research, Research Institute for Microbial Diseases, Osaka University, Osaka 565-0871, Japan
- Graduate School of Medicine, Osaka University, Osaka 565-0871, Japan
| | - Haruhiko Miyata
- Department of Experimental Genome Research, Research Institute for Microbial Diseases, Osaka University, Osaka 565-0871, Japan
| | - Yuki Oyama
- Department of Experimental Genome Research, Research Institute for Microbial Diseases, Osaka University, Osaka 565-0871, Japan
- Graduate School of Pharmaceutical Sciences, Osaka University, Osaka 565-0871, Japan
| | - Seiya Oura
- Department of Experimental Genome Research, Research Institute for Microbial Diseases, Osaka University, Osaka 565-0871, Japan
- Graduate School of Pharmaceutical Sciences, Osaka University, Osaka 565-0871, Japan
| | - Taichi Noda
- Department of Experimental Genome Research, Research Institute for Microbial Diseases, Osaka University, Osaka 565-0871, Japan
- Division of Reproductive Biology, Institute of Resource Development and Analysis, Kumamoto University, Kumamoto 860-0811, Japan
- Priority Organization for Innovation and Excellence, Kumamoto University, Kumamoto 860-8555, Japan
| | - Masahito Ikawa
- Department of Experimental Genome Research, Research Institute for Microbial Diseases, Osaka University, Osaka 565-0871, Japan
- Graduate School of Medicine, Osaka University, Osaka 565-0871, Japan
- Graduate School of Pharmaceutical Sciences, Osaka University, Osaka 565-0871, Japan
- Laboratory of Reproductive Systems Biology, The Institute of Medical Science, The University of Tokyo, Tokyo 108-8639, Japan
- Center for Infectious Disease Education and Research (CiDER), Osaka University, Osaka 565-0871, Japan
| |
Collapse
|
15
|
Xiong W, Shen C, Wang Z. The molecular mechanisms underlying acrosome biogenesis elucidated by gene-manipulated mice. Biol Reprod 2021; 105:789-807. [PMID: 34131698 DOI: 10.1093/biolre/ioab117] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2021] [Revised: 06/04/2021] [Accepted: 06/09/2021] [Indexed: 02/05/2023] Open
Abstract
Sexual reproduction requires the fusion of two gametes in a multistep and multifactorial process termed fertilization. One of the main steps that ensures successful fertilization is acrosome reaction. The acrosome, a special kind of organelle with a cap-like structure that covers the anterior portion of sperm head, plays a key role in the process. Acrosome biogenesis begins with the initial stage of spermatid development, and it is typically divided into four successive phases: the Golgi phase, cap phase, acrosome phase, and maturation phase. The run smoothly of above processes needs an active and specific coordination between the all kinds of organelles (endoplasmic reticulum, trans-golgi network and nucleus) and cytoplasmic structures (acroplaxome and manchette). During the past two decades, an increasingly genes have been discovered to be involved in modulating acrosome formation. Most of these proteins interact with each other and show a complicated molecular regulatory mechanism to facilitate the occurrence of this event. This Review focuses on the progresses of studying acrosome biogenesis using gene-manipulated mice and highlights an emerging molecular basis of mammalian acrosome formation.
Collapse
Affiliation(s)
- Wenfeng Xiong
- State Key Laboratory of Medical Genomics, Research Center for Experimental Medicine, Rui-Jin Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai, China
| | - Chunling Shen
- State Key Laboratory of Medical Genomics, Research Center for Experimental Medicine, Rui-Jin Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai, China
| | - Zhugang Wang
- State Key Laboratory of Medical Genomics, Research Center for Experimental Medicine, Rui-Jin Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai, China
| |
Collapse
|
16
|
Tu C, Li H, Liu X, Wang Y, Li W, Meng L, Wang W, Li Y, Li D, Du J, Lu G, Lin G, Tan YQ. TDRD7 participates in lens development and spermiogenesis by mediating autophagosome maturation. Autophagy 2021; 17:3848-3864. [PMID: 33618632 DOI: 10.1080/15548627.2021.1894058] [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: 12/21/2022] Open
Abstract
In humans, TDRD7 (tudor domain containing 7) mutations lead to a syndrome combining congenital cataracts (CCs) and non-obstructive azoospermia (NOA), characterized by abnormal lens development and spermiogenesis. However, the molecular mechanism underlying TDRD7's functions in eye and testicular development are still largely unknown. Here, we show that the depletion of this gene in mice and humans resulted in the accumulation of autophagosomes and the disruption of macroautophagic/autophagic flux. The disrupted autophagic flux in tdrd7-deficient mouse embryonic fibroblasts (MEFs) was caused by a failure of autophagosome fusion with lysosomes. Furthermore, transcriptome analysis and biochemical assays showed that TDRD7 might directly bind to Tbc1d20 mRNAs and downregulate its expression, which is a key regulator of autophagosome maturation, resulting in the disruption of autophagosome maturation. In addition, we provide evidence to show that TDRD7-mediated autophagosome maturation maintains lens transparency by facilitating the removal of damaged proteins and organelles from lens fiber cells and the biogenesis of acrosome. Altogether, our results showed that TDRD7 plays an essential role in the maturation of autophagosomes and that tdrd7 deletion results in eye defects and testicular abnormalities in mice, implicating disrupted autophagy might be the mechanism that contributes to lens development and spermiogenesis defects in human.Abbreviations: CB: chromatoid bodies; CC: congenital cataract; CTSD: cathepsin D; DMSO: dimethyl sulfoxide; LAMP1: lysosomal-associated membrane protein 1; LECs: lens epithelial cells; MAP1LC3/LC3/Atg8: microtubule-associated protein 1 light chain 3; MEFs: mouse embryonic fibroblasts; NOA: non-obstructive azoospermia; OFZ: organelle-free zone; RG: RNA granules; SQSTM1/p62: sequestosome 1; TBC1D20: TBC1 domain family member 20; TDRD7: tudor domain containing 7; TEM: transmission electron microscopy; WT: wild type.
Collapse
Affiliation(s)
- Chaofeng Tu
- Institute of Reproductive and Stem Cell Engineering, School of Basic Medical Science, Central South University, Changsha, China.,Clinical Research Center for Reproduction and Genetics in Hunan Province, Reproductive and Genetic Hospital of CITIC-Xiangya, Changsha, China.,The Center for Heart Development, Key Lab of MOE for Development Biology and Protein Chemistry, College of Life Sciences, Hunan Normal University, Changsha, China
| | - Haiyu Li
- Institute of Reproductive and Stem Cell Engineering, School of Basic Medical Science, Central South University, Changsha, China
| | - Xuyang Liu
- Shenzhen Key Laboratory of Ophthalmology, Shenzhen Eye Hospital, Jinan University, Shenzhen, China
| | - Ying Wang
- Institute of Reproductive and Stem Cell Engineering, School of Basic Medical Science, Central South University, Changsha, China
| | - Wei Li
- State Key Laboratory of Stem Cell and Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing, China
| | - Lanlan Meng
- Clinical Research Center for Reproduction and Genetics in Hunan Province, Reproductive and Genetic Hospital of CITIC-Xiangya, Changsha, China
| | - Weili Wang
- Institute of Reproductive and Stem Cell Engineering, School of Basic Medical Science, Central South University, Changsha, China
| | - Yong Li
- Institute of Reproductive and Stem Cell Engineering, School of Basic Medical Science, Central South University, Changsha, China
| | - Dongyan Li
- Institute of Reproductive and Stem Cell Engineering, School of Basic Medical Science, Central South University, Changsha, China
| | - Juan Du
- Institute of Reproductive and Stem Cell Engineering, School of Basic Medical Science, Central South University, Changsha, China.,Clinical Research Center for Reproduction and Genetics in Hunan Province, Reproductive and Genetic Hospital of CITIC-Xiangya, Changsha, China
| | - Guangxiu Lu
- Clinical Research Center for Reproduction and Genetics in Hunan Province, Reproductive and Genetic Hospital of CITIC-Xiangya, Changsha, China
| | - Ge Lin
- Institute of Reproductive and Stem Cell Engineering, School of Basic Medical Science, Central South University, Changsha, China.,Clinical Research Center for Reproduction and Genetics in Hunan Province, Reproductive and Genetic Hospital of CITIC-Xiangya, Changsha, China
| | - Yue-Qiu Tan
- Institute of Reproductive and Stem Cell Engineering, School of Basic Medical Science, Central South University, Changsha, China.,Clinical Research Center for Reproduction and Genetics in Hunan Province, Reproductive and Genetic Hospital of CITIC-Xiangya, Changsha, China
| |
Collapse
|
17
|
Wang Z, Shi Y, Ma S, Huang Q, Yap YT, Shi L, Zhang S, Zhou T, Li W, Hu B, Zhang L, Krawetz SA, Pazour GJ, Hess RA, Zhang Z. Abnormal fertility, acrosome formation, IFT20 expression and localization in conditional Gmap210 knockout mice. Am J Physiol Cell Physiol 2020; 318:C174-C190. [PMID: 31577511 PMCID: PMC6985835 DOI: 10.1152/ajpcell.00517.2018] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2018] [Revised: 09/20/2019] [Accepted: 09/20/2019] [Indexed: 01/06/2023]
Abstract
GMAP210 (TRIP11) is a cis-Golgi network-associated protein and a Golgi membrane receptor for IFT20, an intraflagellar transport component essential for male fertility and spermiogenesis in mice. To investigate the role of GMAP210 in male fertility and spermatogenesis, floxed Gmap210 mice were bred with Stra8-iCre mice so that the Gmap210 gene is disrupted in spermatocytes and spermatids in this study. The Gmap210flox/flox: Stra8-iCre mutant mice showed no gross abnormalities and survived to adulthood. In adult males, testis and body weights showed no difference between controls and mutant mice. Low-magnification histological examination of the testes revealed normal seminiferous tubule structure, but sperm counts and fertility were significantly reduced in mutant mice compared with controls. Higher resolution examination of the mutant seminiferous epithelium showed that nearly all sperm had more oblong, abnormally shaped heads, while the sperm tails appeared to have normal morphology. Electron microscopy also revealed abnormally shaped sperm heads but normal axoneme core structure; some sperm showed membrane defects in the midpiece. In mutant mice, expression levels of IFT20 and other selective acrosomal proteins were significantly reduced, and their localization was also affected. Peanut-lectin, an acrosome maker, was almost absent in the spermatids and epididymal sperm. Mitochondrion staining was highly concentrated in the heads of sperm, suggesting that the midpieces were coiling around or aggregating near the heads. Defects in acrosome biogenesis were further confirmed by electron microscopy. Collectively, our findings suggest that GMAP210 is essential for acrosome biogenesis, normal mitochondrial sheath formation, and male fertility, and it determines expression levels and acrosomal localization of IFT20 and other acrosomal proteins.
Collapse
Affiliation(s)
- Zhenyu Wang
- School of Medicine, Hubei Province Key Laboratory of Occupational Hazard Identification and Control, Wuhan University of Science and Technology, Wuhan, China
- Department of Physiology, Wayne State University, Detroit, Michigan
| | - Yuqin Shi
- School of Medicine, Hubei Province Key Laboratory of Occupational Hazard Identification and Control, Wuhan University of Science and Technology, Wuhan, China
| | - Suheng Ma
- School of Medicine, Hubei Province Key Laboratory of Occupational Hazard Identification and Control, Wuhan University of Science and Technology, Wuhan, China
- Department of Physiology, Wayne State University, Detroit, Michigan
| | - Qian Huang
- School of Medicine, Hubei Province Key Laboratory of Occupational Hazard Identification and Control, Wuhan University of Science and Technology, Wuhan, China
- Department of Physiology, Wayne State University, Detroit, Michigan
| | - Yi Tian Yap
- Department of Physiology, Wayne State University, Detroit, Michigan
| | - Lin Shi
- School of Medicine, Hubei Province Key Laboratory of Occupational Hazard Identification and Control, Wuhan University of Science and Technology, Wuhan, China
- Department of Physiology, Wayne State University, Detroit, Michigan
| | - Shiyang Zhang
- School of Medicine, Hubei Province Key Laboratory of Occupational Hazard Identification and Control, Wuhan University of Science and Technology, Wuhan, China
- Department of Physiology, Wayne State University, Detroit, Michigan
| | - Ting Zhou
- School of Medicine, Hubei Province Key Laboratory of Occupational Hazard Identification and Control, Wuhan University of Science and Technology, Wuhan, China
- Department of Physiology, Wayne State University, Detroit, Michigan
| | - Wei Li
- Department of Physiology, Wayne State University, Detroit, Michigan
| | - Bo Hu
- Department of Neurology, Wayne State University, Detroit, Michigan
| | - Ling Zhang
- School of Medicine, Hubei Province Key Laboratory of Occupational Hazard Identification and Control, Wuhan University of Science and Technology, Wuhan, China
| | - Stephen A Krawetz
- Department of Obstetrics/Gynecology and Center for Molecular Medicine and Genetics, Wayne State University, Detroit, Michigan
| | - Gregory J Pazour
- Program in Molecular Medicine, University of Massachusetts Medical School, Worcester, Massachusetts
| | - Rex A Hess
- Department of Comparative Biosciences, College of Veterinary Medicine, University of Illinois, Urbana, Illinois
| | - Zhibing Zhang
- Department of Physiology, Wayne State University, Detroit, Michigan
- Department of Obstetrics/Gynecology and Center for Molecular Medicine and Genetics, Wayne State University, Detroit, Michigan
| |
Collapse
|
18
|
Norizuki T, Minamino N, Ueda T. Role of Autophagy in Male Reproductive Processes in Land Plants. FRONTIERS IN PLANT SCIENCE 2020; 11:756. [PMID: 32625219 PMCID: PMC7311755 DOI: 10.3389/fpls.2020.00756] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/03/2020] [Accepted: 05/12/2020] [Indexed: 05/02/2023]
Abstract
Autophagy is a highly conserved system for degrading and recycling cytoplasmic components. The identification of autophagy-related (ATG) genes, required for autophagosome formation, has led to numerous studies using atg mutants. These studies have revealed the physiological significance of autophagy in various functions of diverse organisms. In land plants, autophagy is required for higher-order functions such as stress responses and development. Although defective autophagy does not result in any marked defect in the reproductive processes of Arabidopsis thaliana under laboratory conditions, several studies have shown that autophagy plays a pivotal role in male reproduction in several land plants. In this review, we aim to summarize information on the role of autophagy in male reproductive processes in land plants.
Collapse
Affiliation(s)
- Takuya Norizuki
- Department of Biological Sciences, Graduate School of Science, The University of Tokyo, Tokyo, Japan
- Division of Cellular Dynamics, National Institute for Basic Biology, Okazaki, Japan
| | - Naoki Minamino
- Division of Cellular Dynamics, National Institute for Basic Biology, Okazaki, Japan
| | - Takashi Ueda
- Division of Cellular Dynamics, National Institute for Basic Biology, Okazaki, Japan
- The Department of Basic Biology, SOKENDAI (The Graduate University for Advanced Studies), Okazaki, Japan
- *Correspondence: Takashi Ueda,
| |
Collapse
|
19
|
Khawar MB, Gao H, Li W. Mechanism of Acrosome Biogenesis in Mammals. Front Cell Dev Biol 2019; 7:195. [PMID: 31620437 PMCID: PMC6759486 DOI: 10.3389/fcell.2019.00195] [Citation(s) in RCA: 87] [Impact Index Per Article: 17.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2019] [Accepted: 08/29/2019] [Indexed: 11/13/2022] Open
Abstract
During sexual reproduction, two haploid gametes fuse to form the zygote, and the acrosome is essential to this fusion process (fertilization) in animals. The acrosome is a special kind of organelle with a cap-like structure that covers the anterior portion of the head of the spermatozoon. The acrosome is derived from the Golgi apparatus and contains digestive enzymes. With the progress of our understanding of acrosome biogenesis, a number of models have been proposed to address the origin of the acrosome. The acrosome has been regarded as a lysosome-related organelle, and it has been proposed to have originated from the lysosome or the autolysosome. Our review will provide a brief historical overview and highlight recent findings on acrosome biogenesis in mammals.
Collapse
Affiliation(s)
- Muhammad Babar Khawar
- State Key Laboratory of Stem Cell and Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing, China
- University of Chinese Academy of Sciences, Beijing, China
| | - Hui Gao
- State Key Laboratory of Stem Cell and Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing, China
| | - Wei Li
- State Key Laboratory of Stem Cell and Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing, China
- University of Chinese Academy of Sciences, Beijing, China
| |
Collapse
|
20
|
Gao H, Khawar MB, Li W. Essential role of autophagy in resource allocation during sexual reproduction. Autophagy 2019; 16:18-27. [PMID: 31203720 DOI: 10.1080/15548627.2019.1628543] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023] Open
Abstract
Sexual reproduction is the most common form of reproduction among eukaryotes, which is characterized by a series of massive cellular or tissue renovations. Recent studies have revealed novel functions of autophagy during sexual reproductive processes, ranging from yeast to mammals. In mammals, autophagy is indispensable for spermatogenesis and oogenesis, and it participates in early embryonic development and maternal-fetus crosstalk to ensure the development of embryos or fetuses. Thus, autophagy provides the molecular basis for resource allocation among parents and their offspring, providing an important way to benefit the next generation.Abbreviations: ATG: autophagy-related; Becn1: beclin 1, autophagy related; CMA: chaperone-mediated autophagy; epg: ectopic PGL granules; ES: ectoplasmic specialization; EVTs: extravillous trophoblasts; MAP1LC3/LC3: microtubule associated protein 1 light chain 3; PCD: programmed cell death; PTB: preterm birth; STB: syncytiotrophoblast.
Collapse
Affiliation(s)
- Hui Gao
- State Key Laboratory of Stem Cell and Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing, China
| | - Muhammad Babar Khawar
- State Key Laboratory of Stem Cell and Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing, China.,University of Chinese Academy of Sciences, Beijing, China
| | - Wei Li
- State Key Laboratory of Stem Cell and Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing, China.,University of Chinese Academy of Sciences, Beijing, China
| |
Collapse
|
21
|
Modarres P, Tavalaee M, Ghaedi K, Nasr-Esfahani MH. An Overview of The Globozoospermia as A Multigenic Identified Syndrome. INTERNATIONAL JOURNAL OF FERTILITY & STERILITY 2018; 12:273-277. [PMID: 30291685 PMCID: PMC6186287 DOI: 10.22074/ijfs.2019.5561] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/05/2018] [Accepted: 05/16/2018] [Indexed: 11/15/2022]
Abstract
Acrosome plays an integral role during fertilization and its absence in individuals with globozoospermia leads to
failure of in vitro fertilization (IVF) and oocyte activation post-intracytoplasmic sperm injection (ICSI). A variety
of processes, organelles and structures are involved in acrosome biogenesis including, trans-golgi network (TGN),
acroplaxome and cellular trafficking. This review aims to explain roles of related signals and molecules involved in
this process and also describe how their absence in form of mutation, deletion and knockout model may lead to phe-
nomenon referred to globozoospermia.
Collapse
Affiliation(s)
- Parastoo Modarres
- Department of Reproductive Biotechnology, Reproductive Biomedicine Research Center, Royan Institute for Biotechnology, ACECR, Isfahan, Iran.,Department of Biology, Faculty of Sciences, University of Isfahan, Isfahan, Iran
| | - Marziyeh Tavalaee
- Department of Reproductive Biotechnology, Reproductive Biomedicine Research Center, Royan Institute for Biotechnology, ACECR, Isfahan, Iran
| | - Kamran Ghaedi
- Department of Biology, Faculty of Sciences, University of Isfahan, Isfahan, Iran.,Department of Cellular Biotechnology, Cell Science Research Center, Royan Institute for Biotechnology, ACECR, Isfahan, Iran.Electronic Address:
| | - Mohammad Hossein Nasr-Esfahani
- Department of Reproductive Biotechnology, Reproductive Biomedicine Research Center, Royan Institute for Biotechnology, ACECR, Isfahan, Iran.,Department of Cellular Biotechnology, Cell Science Research Center, Royan Institute for Biotechnology, ACECR, Isfahan, Iran.Electronic Address:.,Isfahan Fertility and Infertility Center, Isfahan, Iran
| |
Collapse
|
22
|
Guidi LG, Holloway ZG, Arnoult C, Ray PF, Monaco AP, Molnár Z, Velayos-Baeza A. AU040320 deficiency leads to disruption of acrosome biogenesis and infertility in homozygous mutant mice. Sci Rep 2018; 8:10379. [PMID: 29991750 PMCID: PMC6039479 DOI: 10.1038/s41598-018-28666-6] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2017] [Accepted: 06/27/2018] [Indexed: 12/31/2022] Open
Abstract
Study of knockout (KO) mice has helped understand the link between many genes/proteins and human diseases. Identification of infertile KO mice provides valuable tools to characterize the molecular mechanisms underlying gamete formation. The KIAA0319L gene has been described to have a putative association with dyslexia; surprisingly, we observed that homozygous KO males for AU040320, KIAA0319L ortholog, are infertile and present a globozoospermia-like phenotype. Mutant spermatozoa are mostly immotile and display a malformed roundish head with no acrosome. In round spermatids, proacrosomal vesicles accumulate close to the acroplaxome but fail to coalesce into a single acrosomal vesicle. In wild-type mice AU040320 localises to the trans-Golgi-Network of germ cells but cannot be detected in mature acrosomes. Our results suggest AU040320 may be necessary for the normal formation of proacrosomal vesicles or the recruitment of cargo proteins required for downstream events leading to acrosomal fusion. Mutations in KIAA0319L could lead to human infertility; we screened for KIAA0319L mutations in a selected cohort of globozoospermia patients in which no genetic abnormalities have been previously identified, but detected no pathogenic changes in this particular cohort.
Collapse
Affiliation(s)
- Luiz G Guidi
- Wellcome Centre for Human Genetics, University of Oxford, Oxford, OX3 7BN, UK
- Department of Physiology, Anatomy, and Genetics, University of Oxford, Oxford, OX1 3QX, UK
| | - Zoe G Holloway
- Wellcome Centre for Human Genetics, University of Oxford, Oxford, OX3 7BN, UK
| | - Christophe Arnoult
- Genetic Epigenetic and Therapies of Infertility, Institute for Advanced Biosciences, Inserm U1209, CNRS UMR 5309, Université Grenoble Alpes, Grenoble, F-38000, France
| | - Pierre F Ray
- Genetic Epigenetic and Therapies of Infertility, Institute for Advanced Biosciences, Inserm U1209, CNRS UMR 5309, Université Grenoble Alpes, Grenoble, F-38000, France
- UM GI-DPI, CHU Grenoble Alpes, Grenoble, F-38000, France
| | - Anthony P Monaco
- Wellcome Centre for Human Genetics, University of Oxford, Oxford, OX3 7BN, UK
- Office of the President, Ballou Hall, Tufts University, Medford, MA, 02155, USA
| | - Zoltán Molnár
- Department of Physiology, Anatomy, and Genetics, University of Oxford, Oxford, OX1 3QX, UK.
| | - Antonio Velayos-Baeza
- Wellcome Centre for Human Genetics, University of Oxford, Oxford, OX3 7BN, UK.
- Department of Physiology, Anatomy, and Genetics, University of Oxford, Oxford, OX1 3QX, UK.
| |
Collapse
|
23
|
Yamaguchi Y, Yamamoto H, Tobisawa Y, Irie F. TMEM2: A missing link in hyaluronan catabolism identified? Matrix Biol 2018; 78-79:139-146. [PMID: 29601864 DOI: 10.1016/j.matbio.2018.03.020] [Citation(s) in RCA: 61] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2017] [Revised: 03/17/2018] [Accepted: 03/25/2018] [Indexed: 12/20/2022]
Abstract
Hyaluronan (HA) is a glycosaminoglycan (GAG) composed of repeating disaccharide units of glucuronic acid and N-acetylglucosamine. HA is an extremely long, unbranched polymer, which often exceeds 106 Da and sometimes reaches 107 Da. A feature that epitomizes HA is its rapid turnover; one-third of the total body HA is turned over daily. The current model of HA catabolism postulates that high-molecular weight HA in the extracellular space is first cleaved into smaller fragments by a hyaluronidase(s) that resides at the cell surface, followed by internalization of fragments and their degradation into monosaccharides in lysosomes. Over the last decade, considerable research has shown that the HYAL family of hyaluronidases plays significant roles in HA catabolism. Nonetheless, the identity of a hyaluronidase responsible for the initial step of HA cleavage on the cell surface remains elusive, as biochemical and enzymological properties of HYAL proteins are not entirely consistent with those expected of cell surface hyaluronidases. Recent identification of transmembrane 2 (TMEM2) as a cell surface protein that possesses potent hyaluronidase activity suggests that it may be the "missing" cell surface hyaluronidase, and that novel models of HA catabolism should include this protein.
Collapse
Affiliation(s)
- Yu Yamaguchi
- Human Genetics Program, Sanford Burnham Prebys Medical Discovery Institute, 10901 North Torrey Pines Road, La Jolla, CA 92037, USA.
| | - Hayato Yamamoto
- Human Genetics Program, Sanford Burnham Prebys Medical Discovery Institute, 10901 North Torrey Pines Road, La Jolla, CA 92037, USA
| | - Yuki Tobisawa
- Human Genetics Program, Sanford Burnham Prebys Medical Discovery Institute, 10901 North Torrey Pines Road, La Jolla, CA 92037, USA
| | - Fumitoshi Irie
- Human Genetics Program, Sanford Burnham Prebys Medical Discovery Institute, 10901 North Torrey Pines Road, La Jolla, CA 92037, USA
| |
Collapse
|
24
|
Bellezza I, Minelli A. Adenosine in sperm physiology. Mol Aspects Med 2017; 55:102-109. [DOI: 10.1016/j.mam.2016.11.009] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2016] [Revised: 11/23/2016] [Accepted: 11/23/2016] [Indexed: 10/20/2022]
|
25
|
Oberheide K, Puchkov D, Jentsch TJ. Loss of the Na +/H + exchanger NHE8 causes male infertility in mice by disrupting acrosome formation. J Biol Chem 2017; 292:10845-10854. [PMID: 28476888 DOI: 10.1074/jbc.m117.784108] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2017] [Revised: 05/04/2017] [Indexed: 01/02/2023] Open
Abstract
Mammalian sperm feature a specialized secretory organelle on the anterior part of the sperm nucleus, the acrosome, which is essential for male fertility. It is formed by a fusion of Golgi-derived vesicles. We show here that the predominantly Golgi-resident Na+/H+ exchanger NHE8 localizes to the developing acrosome of spermatids. Similar to wild-type mice, Nhe8-/- mice generated Golgi-derived vesicles positive for acrosomal markers and attached to nuclei, but these vesicles failed to form large acrosomal granules and the acrosomal cap. Spermatozoa from Nhe8-/- mice completely lacked acrosomes, were round-headed, exhibited abnormal mitochondrial distribution, and displayed decreased motility, resulting in selective male infertility. Of note, similar features are also found in globozoospermia, one of the causes of male infertility in humans. Germ cell-specific, but not Sertoli cell-specific Nhe8 disruption recapitulated the globozoospermia phenotype, demonstrating that NHE8's role in spermiogenesis is germ cell-intrinsic. Our work has uncovered a crucial role of NHE8 in acrosome biogenesis and suggests that some forms of human globozoospermia might be caused by a loss of function of this Na+/H+ exchanger. It points to NHE8 as a candidate gene for human globozoospermia and a possible drug target for male contraception.
Collapse
Affiliation(s)
- Karina Oberheide
- From the Leibniz-Forschungsinstitut für Molekulare Pharmakologie, D-13125 Berlin and.,Max-Delbrück-Centrum für Molekulare Medizin, D-13125 Berlin, Germany
| | - Dmytro Puchkov
- From the Leibniz-Forschungsinstitut für Molekulare Pharmakologie, D-13125 Berlin and
| | - Thomas J Jentsch
- From the Leibniz-Forschungsinstitut für Molekulare Pharmakologie, D-13125 Berlin and .,Max-Delbrück-Centrum für Molekulare Medizin, D-13125 Berlin, Germany
| |
Collapse
|
26
|
Globozoospermia and lack of acrosome formation in GM130-deficient mice. Cell Death Dis 2017; 8:e2532. [PMID: 28055014 PMCID: PMC5386352 DOI: 10.1038/cddis.2016.414] [Citation(s) in RCA: 45] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2016] [Revised: 10/17/2016] [Accepted: 10/27/2016] [Indexed: 01/25/2023]
Abstract
Globozoospermia is a common reproductive disorder that causes male infertility in humans, and the malformation or loss of acrosomes is the prominent feature of this disease. Although the acrosome is thought to be derived from the Golgi apparatus, the detailed molecular mechanisms remain unclear. GM130 is a cis-side localized Golgi matrix protein,whereas the physiological functions of this protein remain elusive. Here we showed that inactivation of GM130-caused male infertility in mouse model. The primary defects were the absence of acrosomes, round sperm heads, and aberrant assembly of the mitochondrial sheath, which comprise the characteristic features of human globozoospermia. Further investigation indicated that loss of GM130 did not affect the secretion of pro-acrosomic vesicles, whereas the vesicles failed to fuse into a single large acrosome vesicle. Co-localization of the adaptor protein complex AP1 and trans-Golgi network (TGN) protein TGN46 was disrupted, suggesting that the malformation of acrosomes is most likely due to the defect in the sorting and coating of Golgi-derived pro-acrosomic vesicles. Thus, the GM130-deficient mouse provides a valuable model for investigating the etiology of human globozoospermia.
Collapse
|
27
|
Berruti G. Towards defining an ‘origin’—The case for the mammalian acrosome. Semin Cell Dev Biol 2016; 59:46-53. [DOI: 10.1016/j.semcdb.2016.01.013] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2015] [Revised: 01/07/2016] [Accepted: 01/08/2016] [Indexed: 01/19/2023]
|
28
|
Doran J, Walters C, Kyle V, Wooding P, Hammett-Burke R, Colledge WH. Mfsd14a (Hiat1) gene disruption causes globozoospermia and infertility in male mice. Reproduction 2016; 152:91-9. [PMID: 27107036 DOI: 10.1530/rep-15-0557] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2015] [Accepted: 04/21/2016] [Indexed: 01/01/2023]
Abstract
The Mfsd14a gene, previously called Hiat1, encodes a transmembrane protein of unknown function with homology to the solute carrier protein family. To study the function of the MFSD14A protein, mutant mice (Mus musculus, strain 129S6Sv/Ev) were generated with the Mfsd14a gene disrupted with a LacZ reporter gene. Homozygous mutant mice are viable and healthy, but males are sterile due to a 100-fold reduction in the number of spermatozoa in the vas deferens. Male mice have adequate levels of testosterone and show normal copulatory behaviour. The few spermatozoa that are formed show rounded head defects similar to those found in humans with globozoospermia. Spermatogenesis proceeds normally up to the round spermatid stage, but the subsequent structural changes associated with spermiogenesis are severely disrupted with failure of acrosome formation, sperm head condensation and mitochondrial localization to the mid-piece of the sperm. Staining for β-galactosidase activity as a surrogate for Mfsd14a expression indicates expression in Sertoli cells, suggesting that MFSD14A may transport a solute from the bloodstream that is required for spermiogenesis.
Collapse
Affiliation(s)
| | - Cara Walters
- Department of Physiology, Development and NeuroscienceUniversity of Cambridge, Cambridge, UK
| | - Victoria Kyle
- Department of Physiology, Development and NeuroscienceUniversity of Cambridge, Cambridge, UK
| | - Peter Wooding
- Department of Physiology, Development and NeuroscienceUniversity of Cambridge, Cambridge, UK
| | - Rebecca Hammett-Burke
- Department of Physiology, Development and NeuroscienceUniversity of Cambridge, Cambridge, UK
| | - William Henry Colledge
- Department of Physiology, Development and NeuroscienceUniversity of Cambridge, Cambridge, UK
| |
Collapse
|
29
|
Human X-linked Intellectual Disability Factor CUL4B Is Required for Post-meiotic Sperm Development and Male Fertility. Sci Rep 2016; 6:20227. [PMID: 26832838 PMCID: PMC4735749 DOI: 10.1038/srep20227] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2015] [Accepted: 12/23/2015] [Indexed: 01/21/2023] Open
Abstract
In this study, we demonstrate that an E3-ubiquitin ligase associated with human X-linked intellectual disability, CUL4B, plays a crucial role in post-meiotic sperm development. Initially, Cul4b(Δ)/Y male mice were found to be sterile and exhibited a progressive loss in germ cells, thereby leading to oligoasthenospermia. Adult Cul4b mutant epididymides also contained very low numbers of mature spermatozoa, and these spermatazoa exhibited pronounced morphological abnormalities. In post-meiotic spermatids, CUL4B was dynamically expressed and mitosis of spermatogonia and meiosis of spermatocytes both appeared unaffected. However, the spermatids exhibited significantly higher levels of apoptosis during spermiogenesis, particularly during the acrosome phase through the cap phase. Comparative proteomic analyses identified a large-scale shift between wild-type and Cul4b mutant testes during early post-meiotic sperm development. Ultrastructural pathology studies further detected aberrant acrosomes in spermatids and nuclear morphology. The protein levels of both canonical and non-canonical histones were also affected in an early spermatid stage in the absence of Cul4b. Thus, X-linked CUL4B appears to play a critical role in acrosomal formation, nuclear condensation, and in regulating histone dynamics during haploid male germ cell differentiation in relation to male fertility in mice. Thus, it is possible that CUL4B-selective substrates are required for post-meiotic sperm morphogenesis.
Collapse
|
30
|
Elkis Y, Bel S, Rahimi R, Lerer-Goldstein T, Levin-Zaidman S, Babushkin T, Shpungin S, Nir U. TMF/ARA160 Governs the Dynamic Spatial Orientation of the Golgi Apparatus during Sperm Development. PLoS One 2015; 10:e0145277. [PMID: 26701263 PMCID: PMC4689540 DOI: 10.1371/journal.pone.0145277] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2015] [Accepted: 12/02/2015] [Indexed: 12/20/2022] Open
Abstract
TMF/ARA160 is known to be a TATA element Modulatory Factor (TMF). It was initially identified as a DNA-binding factor and a coactivator of the Androgen receptor. It was also characterized as a Golgi-associated protein, which is essential for acrosome formation during functional sperm development. However, the molecular roles of TMF in this intricate process have not been revealed. Here, we show that during spermiogenesis, TMF undergoes a dynamic change of localization throughout the Golgi apparatus. Specifically, TMF translocates from the cis-Golgi to the trans-Golgi network and to the emerging vesicles surface, as the round spermatids develop. Notably, lack of TMF led to an abnormal spatial orientation of the Golgi and to the deviation of the trans-Golgi surface away from the nucleus of the developing round spermatids. Concomitantly, pro-acrosomal vesicles derived from the TMF-/- Golgi lacked targeting properties and did not tether to the spermatid nuclear membrane thereby failing to form the acrosome anchoring scaffold, the acroplaxome, around the cell-nucleus. Absence of TMF also perturbed the positioning of microtubules, which normally lie in proximity to the Golgi and are important for maintaining Golgi spatial orientation and dynamics and for chromatoid body formation, which is impaired in TMF-/- spermatids. In-silico evaluation combined with molecular and electron microscopic analyses revealed the presence of a microtubule interacting domain (MIT) in TMF, and confirmed the association of TMF with microtubules in spermatogenic cells. Furthermore, the MIT domain in TMF, along with microtubules integrity, are required for stable association of TMF with the Golgi apparatus. Collectively, we show here for the first time that a Golgi and microtubules associated protein is crucial for maintaining proper Golgi orientation during a cell developmental process.
Collapse
Affiliation(s)
- Yoav Elkis
- The Mina and Everard Goodman Faculty of Life Sciences, Bar-Ilan University, Ramat-Gan, 52900, Israel
| | - Shai Bel
- The Mina and Everard Goodman Faculty of Life Sciences, Bar-Ilan University, Ramat-Gan, 52900, Israel
| | - Roni Rahimi
- The Mina and Everard Goodman Faculty of Life Sciences, Bar-Ilan University, Ramat-Gan, 52900, Israel
| | - Tali Lerer-Goldstein
- The Mina and Everard Goodman Faculty of Life Sciences, Bar-Ilan University, Ramat-Gan, 52900, Israel
| | - Smadar Levin-Zaidman
- Electron Microscopy Unit, Weizmann Institute of Science, Rehovot, 7610001, Israel
| | - Tatiana Babushkin
- The Mina and Everard Goodman Faculty of Life Sciences, Bar-Ilan University, Ramat-Gan, 52900, Israel
| | - Sally Shpungin
- The Mina and Everard Goodman Faculty of Life Sciences, Bar-Ilan University, Ramat-Gan, 52900, Israel
| | - Uri Nir
- The Mina and Everard Goodman Faculty of Life Sciences, Bar-Ilan University, Ramat-Gan, 52900, Israel
| |
Collapse
|
31
|
Torres-Fuentes JL, Rios M, Moreno RD. Involvement of a P2X7 Receptor in the Acrosome Reaction Induced by ATP in Rat Spermatozoa. J Cell Physiol 2015; 230:3068-75. [PMID: 25989529 DOI: 10.1002/jcp.25044] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2014] [Accepted: 05/11/2015] [Indexed: 02/06/2023]
Abstract
The acrosome reaction (AR) is the exocytosis of the acrosomal vesicle in response to different physiological and non-physiological stimuli. Particularly in mammals, the AR is needed for sperm to fuse with the oocyte plasma membrane, and it occurs only in capacitated sperm. Previous evidence in the literature indicates that extracellular ATP induces the AR in capacitated human and bovine spermatozoa, but its receptor has not yet been identified. The aim of this work was to define a putative ATP receptor in rat spermatozoa using pharmacological and biochemical approaches. We found that ATP induced the AR only in capacitated rat spermatozoa, which was inhibited in the presence of two general inhibitors of ATP receptors (P2 receptors), Suramin, and oxidized ATP (oATP), and one inhibitor of P2X receptor (pyridoxalphosphate-6-azophenyl-2',4'-disulfonic acid [PPADS]). In addition, the AR induced by ATP in capacitated rat spermatozoa was inhibited by brilliant blue-G (BB-G) and 17-β-oestradiol, two blockers of P2X7 receptors. Moreover, the ATP analog 2'(3')-O-(4-benzoylbenzoyl) ATP (BzATP) was almost 500 times more potent than ATP to induce the AR, which agrees with the pharmacology of a P2X7 receptor. Here, we show the presence of P2X7 receptor by Western blot and its localization in the tail and acrosome by indirect immunofluorescence. Finally, we quantify the presence of ATP in the rat oviduct during the estrous cycle. We found that the ATP concentration within the lumen of the oviduct is similar to those required to induce acrosome reaction, which agree with its role during in vivo fertilization. Therefore, our results strongly suggest that ATP induces the AR in capacitated rat spermatozoa through a P2X7 receptor, which may be functional during in vivo fertilization.
Collapse
Affiliation(s)
- Jorge L Torres-Fuentes
- Departamento de Fisiología, Facultad de Ciencias Biológicas, Pontificia Universidad Católica de Chile, Santiago, Chile
| | - Mariana Rios
- Departamento de Fisiología, Facultad de Ciencias Biológicas, Pontificia Universidad Católica de Chile, Santiago, Chile
| | - Ricardo D Moreno
- Departamento de Fisiología, Facultad de Ciencias Biológicas, Pontificia Universidad Católica de Chile, Santiago, Chile
| |
Collapse
|
32
|
Houston B, Curry B, Aitken RJ. Human spermatozoa possess an IL4I1 l-amino acid oxidase with a potential role in sperm function. Reproduction 2015; 149:587-96. [DOI: 10.1530/rep-14-0621] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2014] [Accepted: 03/12/2015] [Indexed: 11/08/2022]
Abstract
Reactive oxygen species (ROS) are known to play an important role in the regulation of human sperm function. In this study, we demonstrate for the first time that human spermatozoa possess interleukin-induced gene 1 (IL4I1), anl-amino acid oxidase (LAAO) which is capable of generating ROS on exposure to aromatic amino acids in the presence of oxygen. The preferred substrates were found to be phenylalanine and tryptophan while the enzyme was located in the acrosomal region and midpiece of these cells. In contrast to equine and bovine spermatozoa, enzyme activity was lost as soon as the spermatozoa became non-viable. On a cell-to-cell basis human spermatozoa were also shown to generate lower levels of hydrogen peroxide than their equine counterparts on exposure to phenylalanine. Stimulation of LAAO activity resulted in the induction of several hallmarks of capacitation including tyrosine phosphorylation of the sperm flagellum and concomitant activation of phospho-SRC expression. In addition, stimulation of LAAO resulted in an increase in the levels of acrosomal exocytosis in both the presence and absence of progesterone stimulation, via mechanisms that could be significantly reversed by the presence of catalase. As is often the case with free radical-mediated phenomena, prolonged exposure of human spermatozoa to phenylalanine resulted in the stimulation of apoptosis as indicated by significant increases in mitochondrial superoxide generation and the activation of intracellular caspases. These results confirm the existence of an LAAO in human spermatozoa with a potential role in driving the redox regulation of sperm capacitation and acrosomal exocytosis.
Collapse
|
33
|
Raju D, Schonauer S, Hamzeh H, Flynn KC, Bradke F, vom Dorp K, Dörmann P, Yildiz Y, Trötschel C, Poetsch A, Breiden B, Sandhoff K, Körschen HG, Wachten D. Accumulation of glucosylceramide in the absence of the beta-glucosidase GBA2 alters cytoskeletal dynamics. PLoS Genet 2015; 11:e1005063. [PMID: 25803043 PMCID: PMC4372435 DOI: 10.1371/journal.pgen.1005063] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2014] [Accepted: 02/09/2015] [Indexed: 11/18/2022] Open
Abstract
Glycosphingolipids are key elements of cellular membranes, thereby, controlling a variety of cellular functions. Accumulation of the simple glycosphingolipid glucosylceramide results in life-threatening lipid storage-diseases or in male infertility. How glucosylceramide regulates cellular processes is ill defined. Here, we reveal that glucosylceramide accumulation in GBA2 knockout-mice alters cytoskeletal dynamics due to a more ordered lipid organization in the plasma membrane. In dermal fibroblasts, accumulation of glucosylceramide augments actin polymerization and promotes microtubules persistence, resulting in a higher number of filopodia and lamellipodia and longer microtubules. Similar cytoskeletal defects were observed in male germ and Sertoli cells from GBA2 knockout-mice. In particular, the organization of F-actin structures in the ectoplasmic specialization and microtubules in the sperm manchette is affected. Thus, glucosylceramide regulates cytoskeletal dynamics, providing mechanistic insights into how glucosylceramide controls signaling pathways not only during sperm development, but also in other cell types. During mammalian spermatogenesis, sperm with a head and a tail are formed from a round cell. This process is tightly regulated and involves the close interaction of somatic Sertoli cells and germ cells. Accumulation of the glycosphingolipid glucosylceramide in the absence of the beta-glucosidase GBA2 has been proposed to disturb sperm development, leading to morphological defects. However, the underlying mechanism is not known. Here, we demonstrate that accumulation of glucosylceramide in GBA2 knockout-mice controls the dynamics of the actin and microtubule cytoskeleton, which are crucial for sperm development. In particular, cytoskeletal structures at the interface between Sertoli and germ cells are disorganized, leading to malformation of the sperm head and a defect in acrosome formation. In summary, we provide mechanistic insights into how glucosylceramide controls cellular signaling and dysregulation of this essential glycosphingolipid leads to male infertility.
Collapse
Affiliation(s)
- Diana Raju
- Minerva Research Group—Molecular Physiology, Center of Advanced European Studies and Research, Bonn, Germany
| | - Sophie Schonauer
- Minerva Research Group—Molecular Physiology, Center of Advanced European Studies and Research, Bonn, Germany
| | - Hussein Hamzeh
- Minerva Research Group—Molecular Physiology, Center of Advanced European Studies and Research, Bonn, Germany
| | - Kevin C. Flynn
- Axon Growth and Regeneration, German Center for Neurodegenerative Diseases (DZNE e.V.), Bonn, Germany
| | - Frank Bradke
- Axon Growth and Regeneration, German Center for Neurodegenerative Diseases (DZNE e.V.), Bonn, Germany
| | - Katharina vom Dorp
- Institute of Molecular Physiology and Biotechnology of Plants, University of Bonn, Bonn, Germany
| | - Peter Dörmann
- Institute of Molecular Physiology and Biotechnology of Plants, University of Bonn, Bonn, Germany
| | - Yildiz Yildiz
- Innere Medizin am Landeskrankenhaus Bregenz, Bregenz, Austria
| | | | - Ansgar Poetsch
- Biochemie der Pflanzen, Ruhr-Universität Bochum, Bochum, Germany
| | - Bernadette Breiden
- Life and Medical Sciences Institute (LIMES) c/o Kekulé-Institute of Chemistry and Biochemistry, Bonn, Germany
| | - Konrad Sandhoff
- Life and Medical Sciences Institute (LIMES) c/o Kekulé-Institute of Chemistry and Biochemistry, Bonn, Germany
| | - Heinz G. Körschen
- Department of Molecular Sensory Systems, Center of Advanced European Studies and Research, Bonn, Germany
| | - Dagmar Wachten
- Minerva Research Group—Molecular Physiology, Center of Advanced European Studies and Research, Bonn, Germany
- * E-mail:
| |
Collapse
|
34
|
Ayaz A, Agarwal A, Sharma R, Arafa M, Elbardisi H, Cui Z. Impact of precise modulation of reactive oxygen species levels on spermatozoa proteins in infertile men. Clin Proteomics 2015; 12:4. [PMID: 25972767 PMCID: PMC4429661 DOI: 10.1186/1559-0275-12-4] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2014] [Accepted: 01/15/2015] [Indexed: 11/17/2022] Open
Abstract
Background Elevated levels of reactive oxygen species (ROS) are detected in 25% to 80% of infertile men. They are involved in the pathology of male infertility. Understanding the effect of increasing levels of ROS on the differential expression of sperm proteins is important to understand the cellular processes and or/pathways that may be implicated in male infertility. The aim of this study was to examine differentially expressed proteins (DEPs) in spermatozoa from patients with low, medium and high ROS levels. Methods A total of 42 infertile men presenting for infertility and 17 proven fertile men were enrolled in the study. ROS levels were measured by chemiluminescence assay. Infertile men were divided into Low (0- < 93 RLU/s/106 sperm) (n = 11), Medium (>93-500 RLU/s/106 sperm) (n = 17) and High ROS (>500 RLU/s/106 sperm) group (n = 14). All fertile men had ROS levels between 4-50 RLU/s/106 sperm. 4 subjects from fertile group and 4 each from the Low, Medium and High ROS were pooled. Protein extraction, protein estimation, gel separation of the proteins, in-gel digestion, LTQ-orbitrap elite hybrid mass spectrometry system was conducted. The DEPs, the cellular localization and pathways of DEPs involved were examined utilizing bioinformatics tools. Results 1035 proteins were identified in the 3 groups by global proteomic analysis. Of these, 305 were DEPs. 51 were unique to the Low ROS group, 47 Medium ROS group and 104 were unique to the High ROS group. 6 DEPs were identified by Uniprot and DAVID that had distinct reproductive functions and they were expressed only in 3 ROS groups but not in the control. Conclusions We have for the first time demonstrated the presence of 6 DEPs with distinct reproductive functions only in men with low, medium or high ROS levels. These DEPs can serve as potential biomarkers of oxidative stress induced male infertility. Electronic supplementary material The online version of this article (doi:10.1186/1559-0275-12-4) contains supplementary material, which is available to authorized users.
Collapse
Affiliation(s)
- Ahmet Ayaz
- Center for Reproductive Medicine, Glickman Urological & Kidney Institute, Cleveland Clinic, Cleveland, OH 44195 USA
| | - Ashok Agarwal
- Center for Reproductive Medicine, Glickman Urological & Kidney Institute, Cleveland Clinic, Cleveland, OH 44195 USA
| | - Rakesh Sharma
- Center for Reproductive Medicine, Glickman Urological & Kidney Institute, Cleveland Clinic, Cleveland, OH 44195 USA
| | - Mohamed Arafa
- Male Infertility Unit, Department of Urology, Hamad Hospital, Doha, Qatar
| | - Haitham Elbardisi
- Male Infertility Unit, Department of Urology, Hamad Hospital, Doha, Qatar
| | - Zhihong Cui
- Center for Reproductive Medicine, Glickman Urological & Kidney Institute, Cleveland Clinic, Cleveland, OH 44195 USA
| |
Collapse
|
35
|
Berruti G, Paiardi C. Acrosome biogenesis: Revisiting old questions to yield new insights. SPERMATOGENESIS 2014; 1:95-98. [PMID: 22319656 DOI: 10.4161/spmg.1.2.16820] [Citation(s) in RCA: 78] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/04/2011] [Accepted: 06/07/2011] [Indexed: 01/23/2023]
Abstract
The acrosome is a unique membranous organelle located over the anterior part of the sperm nucleus that is highly conserved throughout evolution. This acidic vacuole contains a number of hydrolytic enzymes that, when secreted, help the sperm penetrate the egg's coats. Although acrosome biogenesis is an important aspect of spermiogenesis, the molecular mechanism(s) that regulates this event remains unknown. Active trafficking from the Golgi apparatus is involved in acrosome formation, but experimental evidence indicates that trafficking of vesicles out of the Golgi also occurs during acrosomogenesis. Unfortunately, this second aspect of acrosome biogenesis remains poorly studied. In this article, we briefly discuss how the biosynthetic and endocytic pathways, assisted by a network of microtubules, tethering factors, motor proteins and small GTPases, relate and connect to give rise to the sperm-specific vacuole, with a particular emphasis placed on the endosomal compartment. It is hoped that this information will be useful to engage more studies on acrosome biogenesis by focusing attention towards suggested directions.
Collapse
Affiliation(s)
- Giovanna Berruti
- Department of Biology; Laboratory of Cellular and Molecular Biology of Reproduction; University of Milan; Milan, Italy
| | | |
Collapse
|
36
|
Molecular chaperones, cochaperones, and ubiquitination/deubiquitination system: involvement in the production of high quality spermatozoa. BIOMED RESEARCH INTERNATIONAL 2014; 2014:561426. [PMID: 25045686 PMCID: PMC4089148 DOI: 10.1155/2014/561426] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/27/2014] [Accepted: 06/04/2014] [Indexed: 01/16/2023]
Abstract
Spermatogenesis is a complex process in which mitosis, meiosis, and cell differentiation events coexist. The need to guarantee the production of qualitatively functional spermatozoa has evolved into several control systems that check spermatogenesis progression/sperm maturation and tag aberrant gametes for degradation. In this review, we will focus on the importance of the evolutionarily conserved molecular pathways involving molecular chaperones belonging to the superfamily of heat shock proteins (HSPs), their cochaperones, and ubiquitination/deubiquitination system all over the spermatogenetic process. In this respect, we will discuss the conserved role played by the DNAJ protein Msj-1 (mouse sperm cell-specific DNAJ first homologue) and the deubiquitinating enzyme Ubpy (ubiquitin-specific processing protease-y) during the spermiogenesis in both mammals and nonmammalian vertebrates.
Collapse
|
37
|
Wang H, Wan H, Li X, Liu W, Chen Q, Wang Y, Yang L, Tang H, Zhang X, Duan E, Zhao X, Gao F, Li W. Atg7 is required for acrosome biogenesis during spermatogenesis in mice. Cell Res 2014; 24:852-69. [PMID: 24853953 DOI: 10.1038/cr.2014.70] [Citation(s) in RCA: 187] [Impact Index Per Article: 18.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2013] [Revised: 03/13/2014] [Accepted: 04/14/2014] [Indexed: 12/21/2022] Open
Abstract
The acrosome is a specialized organelle that covers the anterior part of the sperm nucleus and plays an essential role in the process of fertilization. The molecular mechanism underlying the biogenesis of this lysosome-related organelle (LRO) is still largely unknown. Here, we show that germ cell-specific Atg7-knockout mice were infertile due to a defect in acrosome biogenesis and displayed a phenotype similar to human globozoospermia; this reproductive defect was successfully rescued by intracytoplasmic sperm injections. Furthermore, the depletion of Atg7 in germ cells did not affect the early stages of development of germ cells, but at later stages of spermatogenesis, the proacrosomal vesicles failed to fuse into a single acrosomal vesicle during the Golgi phase, which finally resulted in irregular or nearly round-headed spermatozoa. Autophagic flux was disrupted in Atg7-depleted germ cells, finally leading to the failure of LC3 conjugation to Golgi apparatus-derived vesicles. In addition, Atg7 partially regulated another globozoospermia-related protein, Golgi-associated PDZ- and coiled-coil motif-containing protein (GOPC), during acrosome biogenesis. Finally, the injection of either autophagy or lysosome inhibitors into testis resulted in a similar phenotype to that of germ cell-specific Atg7-knockout mice. Altogether, our results uncover a new role for Atg7 in the biogenesis of the acrosome, and we provide evidence to support the autolysosome origination hypothesis for the acrosome.
Collapse
Affiliation(s)
- Hongna Wang
- 1] State Key Laboratory of Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, China [2] University of Chinese Academy of Sciences, Beijing 100049, China
| | - Haifeng Wan
- State Key Laboratory of Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, China
| | - Xixia Li
- 1] State Key Laboratory of Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, China [2] University of Chinese Academy of Sciences, Beijing 100049, China
| | - Weixiao Liu
- State Key Laboratory of Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, China
| | - Qi Chen
- State Key Laboratory of Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, China
| | - Yaqing Wang
- State Key Laboratory of Molecular Developmental Biology, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing 100101, China
| | - Lin Yang
- State Key Laboratory of Molecular Developmental Biology, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing 100101, China
| | - Hongmei Tang
- College of Life Sciences, Hebei United University, Tangshan, Hebei 063000, China
| | - Xiujun Zhang
- College of Life Sciences, Hebei United University, Tangshan, Hebei 063000, China
| | - Enkui Duan
- State Key Laboratory of Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, China
| | - Xiaoyang Zhao
- State Key Laboratory of Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, China
| | - Fei Gao
- State Key Laboratory of Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, China
| | - Wei Li
- State Key Laboratory of Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, China
| |
Collapse
|
38
|
Nguyen EB, Westmuckett AD, Moore KL. SPACA7 is a novel male germ cell-specific protein localized to the sperm acrosome that is involved in fertilization in mice. Biol Reprod 2014; 90:16. [PMID: 24307706 DOI: 10.1095/biolreprod.113.111831] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022] Open
Abstract
Sperm acrosome associated 7 (SPACA7) is a novel protein of unknown function with no homology to any known protein. Spaca7 transcripts are detected only in testis and predict a 158-residue mature polypeptide with one potential N-glycosylation site and no cysteines. Orthologs are present in various species, including mice and humans. We developed a polyclonal antibody to mouse SPACA7 to study its expression and function. Western blotting and immunofluorescence microscopy detected SPACA7 only in testis, and it was detected in testis starting at Postnatal Day 21 and into adulthood. Immunofluorescence staining of testicular germ cells detected weak SPACA7 expression as early as zygotene spermatocytes. Higher expression was observed in round spermatids, where SPACA7 was localized to a perinuclear spot adjacent to the Golgi and to the acrosome of elongating spermatids and spermatozoa. Immunogold electron microscopy demonstrated that SPACA7 is localized within the proacrosomal granule of round spermatids and the acrosome of spermatozoa. Finally, we showed that SPACA7 was retained within the acrosome of epididymal sperm and was released upon the acrosome reaction. To assess if SPACA7 was involved in fertilization, in vitro fertilization assays in the presence of anti-SPACA7 IgG were performed. Anti-SPACA7 inhibited fertilization of cumulus-intact eggs and prominently delayed cumulus dispersal. However, anti-SPACA7 did not inhibit fertilization of cumulus-free eggs. Our findings indicate that release of SPACA7 from the acrosome accelerates cumulus dispersal and facilitates fertilization via unknown mechanisms. This study is the first to document the expression of endogenous SPACA7 and a function for this novel acrosomal protein.
Collapse
Affiliation(s)
- Edward B Nguyen
- Department of Cell Biology, University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma
| | | | | |
Collapse
|
39
|
Wang G, Wu Y, Zhou T, Guo Y, Zheng B, Wang J, Bi Y, Liu F, Zhou Z, Guo X, Sha J. Mapping of the N-Linked Glycoproteome of Human Spermatozoa. J Proteome Res 2013; 12:5750-9. [DOI: 10.1021/pr400753f] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Gaigai Wang
- State Key Laboratory of Reproductive
Medicine, Department of Histology and Embryology, Nanjing Medical University, Nanjing 210029, China
| | - Yibo Wu
- State Key Laboratory of Reproductive
Medicine, Department of Histology and Embryology, Nanjing Medical University, Nanjing 210029, China
| | - Tao Zhou
- State Key Laboratory of Reproductive
Medicine, Department of Histology and Embryology, Nanjing Medical University, Nanjing 210029, China
| | - Yueshuai Guo
- State Key Laboratory of Reproductive
Medicine, Department of Histology and Embryology, Nanjing Medical University, Nanjing 210029, China
| | - Bo Zheng
- State Key Laboratory of Reproductive
Medicine, Department of Histology and Embryology, Nanjing Medical University, Nanjing 210029, China
| | - Jing Wang
- State Key Laboratory of Reproductive
Medicine, Department of Histology and Embryology, Nanjing Medical University, Nanjing 210029, China
| | - Ye Bi
- State Key Laboratory of Reproductive
Medicine, Department of Histology and Embryology, Nanjing Medical University, Nanjing 210029, China
| | - Fangjuan Liu
- State Key Laboratory of Reproductive
Medicine, Department of Histology and Embryology, Nanjing Medical University, Nanjing 210029, China
| | - Zuomin Zhou
- State Key Laboratory of Reproductive
Medicine, Department of Histology and Embryology, Nanjing Medical University, Nanjing 210029, China
| | - Xuejiang Guo
- State Key Laboratory of Reproductive
Medicine, Department of Histology and Embryology, Nanjing Medical University, Nanjing 210029, China
| | - Jiahao Sha
- State Key Laboratory of Reproductive
Medicine, Department of Histology and Embryology, Nanjing Medical University, Nanjing 210029, China
| |
Collapse
|
40
|
Amaral A, Castillo J, Ramalho-Santos J, Oliva R. The combined human sperm proteome: cellular pathways and implications for basic and clinical science. Hum Reprod Update 2013; 20:40-62. [DOI: 10.1093/humupd/dmt046] [Citation(s) in RCA: 184] [Impact Index Per Article: 16.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
|
41
|
Funaki T, Kon S, Tanabe K, Natsume W, Sato S, Shimizu T, Yoshida N, Wong WF, Ogura A, Ogawa T, Inoue K, Ogonuki N, Miki H, Mochida K, Endoh K, Yomogida K, Fukumoto M, Horai R, Iwakura Y, Ito C, Toshimori K, Watanabe T, Satake M. The Arf GAP SMAP2 is necessary for organized vesicle budding from the trans-Golgi network and subsequent acrosome formation in spermiogenesis. Mol Biol Cell 2013; 24:2633-44. [PMID: 23864717 PMCID: PMC3756916 DOI: 10.1091/mbc.e13-05-0234] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
Abstract
SMAP2 is an Arf GAP and modulates clathrin-coated vesicle formation. SMAP2-deficient male mice exhibited globozoospermia due to acrosome deformation. In SMAP2(−/−) spermatids, budding of proacrosomal vesicles from the TGN was distorted and clathrin traffic–related molecules such as CALM and syntaxin2 were mislocated. The trans-Golgi network (TGN) functions as a hub organelle in the exocytosis of clathrin-coated membrane vesicles, and SMAP2 is an Arf GTPase-activating protein that binds to both clathrin and the clathrin assembly protein (CALM). In the present study, SMAP2 is detected on the TGN in the pachytene spermatocyte to the round spermatid stages of spermatogenesis. Gene targeting reveals that SMAP2-deficient male mice are healthy and survive to adulthood but are infertile and exhibit globozoospermia. In SMAP2-deficient spermatids, the diameter of proacrosomal vesicles budding from TGN increases, TGN structures are distorted, acrosome formation is severely impaired, and reorganization of the nucleus does not proceed properly. CALM functions to regulate vesicle sizes, and this study shows that CALM is not recruited to the TGN in the absence of SMAP2. Furthermore, syntaxin2, a component of the soluble N-ethylmaleimide–sensitive factor attachment protein receptor (SNARE) complex, is not properly concentrated at the site of acrosome formation. Thus this study reveals a link between SMAP2 and CALM/syntaxin2 in clathrin-coated vesicle formation from the TGN and subsequent acrosome formation. SMAP2-deficient mice provide a model for globozoospermia in humans.
Collapse
Affiliation(s)
- Tomo Funaki
- Department of Molecular Immunology, Department of Pathology, Institute of Development, Aging and Cancer, Tohoku University, Sendai 980-8575, Japan
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
42
|
Shi Y, Zhang L, Song S, Teves ME, Li H, Wang Z, Hess RA, Jiang G, Zhang Z. The mouse transcription factor-like 5 gene encodes a protein localized in the manchette and centriole of the elongating spermatid. Andrology 2013; 1:431-9. [PMID: 23444080 DOI: 10.1111/j.2047-2927.2013.00069.x] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2012] [Revised: 01/05/2013] [Accepted: 01/11/2013] [Indexed: 12/17/2022]
Abstract
Spermiogenesis is the final phase of spermatogenesis. During this process, haploid round spermatids differentiate into spermatozoa, with dramatic morphological changes, including elongation and condensation of the nuclei, and formation of the flagella. Meig1 is one of many genes involved in the regulation of this process. Male mice deficient in MEIG1 are sterile with a severe defect in spermiogenesis, associated with dramatic disruption of the spermatid manchette and failure of flagellogenesis. A yeast two-hybrid screen using full-length MEIG1 as bait identified transcription factor-like 5 protein (TCFL5) as a putative interacting proteins. Interestingly, this protein was also identified as a potential binding partner of SPAG16, another protein essential for spermatogenesis, and also a binding partner of MEIG1. The interaction between TCFL5 and MEIG1 was confirmed in cultured cells over-expressing the two proteins. The mouse Tcfl5 transcript is present only in the testis, and its expression is significantly increased during spermiogenesis. However, little is known about TCFL5 protein and its role in male germ cells. A rabbit polyclonal antibody was generated against the C-terminal region of TCFL5. Mouse TCFL5 protein was expressed in the testis but not in mature spermatozoa. During the first wave of spermatogenesis, TCFL5 expression was dramatically increased at day 30 after birth. In the testis and a mixture of dispersed testicular cells, the protein co-localized with α-tubulin, a manchette marker in early elongating spermatids. The protein also localized in the centrioles of late elongating spermatids. No obvious differences in TCFL5 epitope abundance and localization were observed between wild type and the Meig1-deficient mice. These findings suggest that TCFL5 may play a role upstream of MEIG1 action, and based on putative binding partners and localization is likely to be involved in spermiogenesis and formation of the sperm flagella.
Collapse
Affiliation(s)
- Y Shi
- School of Public Health, Wuhan University of Science and Technology, Wuhan, China
| | | | | | | | | | | | | | | | | |
Collapse
|
43
|
Wei AH, Li W. Hermansky-Pudlak syndrome: pigmentary and non-pigmentary defects and their pathogenesis. Pigment Cell Melanoma Res 2012; 26:176-92. [DOI: 10.1111/pcmr.12051] [Citation(s) in RCA: 91] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2012] [Accepted: 11/16/2012] [Indexed: 10/27/2022]
Affiliation(s)
| | - Wei Li
- State Key Laboratory of Molecular Developmental Biology; Institute of Genetics & Developmental Biology; Chinese Academy of Sciences; Beijing; China
| |
Collapse
|
44
|
Ickowicz D, Finkelstein M, Breitbart H. Mechanism of sperm capacitation and the acrosome reaction: role of protein kinases. Asian J Androl 2012; 14:816-21. [PMID: 23001443 PMCID: PMC3720105 DOI: 10.1038/aja.2012.81] [Citation(s) in RCA: 156] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2012] [Revised: 05/30/2012] [Accepted: 07/08/2012] [Indexed: 12/19/2022] Open
Abstract
Mammalian sperm must undergo a series of biochemical and physiological modifications, collectively called capacitation, in the female reproductive tract prior to the acrosome reaction (AR). The mechanisms of these modifications are not well characterized though protein kinases were shown to be involved in the regulation of intracellular Ca(2+) during both capacitation and the AR. In the present review, we summarize some of the signaling events that are involved in capacitation. During the capacitation process, phosphatidyl-inositol-3-kinase (PI3K) is phosphorylated/activated via a protein kinase A (PKA)-dependent cascade, and downregulated by protein kinase C α (PKCα). PKCα is active at the beginning of capacitation, resulting in PI3K inactivation. During capacitation, PKCα as well as PP1γ2 is degraded by a PKA-dependent mechanism, allowing the activation of PI3K. The activation of PKA during capacitation depends mainly on cyclic adenosine monophosphate (cAMP) produced by the bicarbonate-dependent soluble adenylyl cyclase. This activation of PKA leads to an increase in actin polymerization, an essential process for the development of hyperactivated motility, which is necessary for successful fertilization. Actin polymerization is mediated by PIP(2) in two ways: first, PIP(2) acts as a cofactor for phospholipase D (PLD) activation, and second, as a molecule that binds and inhibits actin-severing proteins such as gelsolin. Tyrosine phosphorylation of gelsolin during capacitation by Src family kinase (SFK) is also important for its inactivation. Prior to the AR, gelsolin is released from PIP(2) and undergoes dephosphorylation/activation, resulting in fast F-actin depolymerization, leading to the AR.
Collapse
Affiliation(s)
- Debby Ickowicz
- The Mina & Everard Faculty of Life Sciences, Bar-Ilan University, Ramat-Gan 52100, Israel
| | | | | |
Collapse
|
45
|
Abstract
Drosophila melanogaster spermatids undergo dramatic morphological changes as they differentiate from small round cells approximately 12 μm in diameter into highly polarized, 1.8 mm long, motile sperm capable of participating in fertilization. During spermiogenesis, syncytial cysts of 64 haploid spermatids undergo synchronous differentiation. Numerous changes occur at a subcellular level, including remodeling of existing organelles (mitochondria, nuclei), formation of new organelles (flagellar axonemes, acrosomes), polarization of elongating cysts and plasma membrane addition. At the end of spermatid morphogenesis, organelles, mitochondrial DNA and cytoplasmic components not needed in mature sperm are stripped away in a caspase-dependent process called individualization that results in formation of individual sperm. Here, we review the stages of Drosophila spermiogenesis and examine our current understanding of the cellular and molecular mechanisms involved in shaping male germ cell-specific organelles and forming mature, fertile sperm.
Collapse
Affiliation(s)
- Lacramioara Fabian
- Cell Biology Program; The Hospital for Sick Children (SickKids); Toronto, ON Canada
| | - Julie A. Brill
- Cell Biology Program; The Hospital for Sick Children (SickKids); Toronto, ON Canada
- Department of Molecular Genetics; University of Toronto; Toronto, ON Canada
| |
Collapse
|
46
|
Alvarez Sedo C, Rawe VY, Chemes HE. Acrosomal biogenesis in human globozoospermia: immunocytochemical, ultrastructural and proteomic studies. Hum Reprod 2012; 27:1912-21. [DOI: 10.1093/humrep/des126] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
|
47
|
Developmental genetics of secretory vesicle acidification during Caenorhabditis elegans spermatogenesis. Genetics 2012; 191:477-91. [PMID: 22446317 DOI: 10.1534/genetics.112.139618] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023] Open
Abstract
Secretory vesicles are used during spermatogenesis to deliver proteins to the cell surface. In Caenorhabditis elegans, secretory membranous organelles (MO) fuse with the plasma membrane to transform spermatids into fertilization-competent spermatozoa. We show that, like the acrosomal vesicle of mammalian sperm, MOs undergo acidification during development. Treatment of spermatids with the V-ATPase inhibitor bafilomycin blocks both MO acidification and formation of functional spermatozoa. There are several spermatogenesis-defective mutants that cause defects in MO morphogenesis, including spe-5. We determined that spe-5, which is on chromosome I, encodes one of two V-ATPase B paralogous subunits. The spe-5 null mutant is viable but sterile because it forms arrested, multi-nucleate spermatocytes. Immunofluorescence with a SPE-5-specific monoclonal antibody shows that SPE-5 expression begins in spermatocytes and is found in all subsequent stages of spermatogenesis. Most SPE-5 is discarded into the residual body during spermatid budding, but a small amount remains in budded spermatids where it localizes to MOs as a discrete dot. The other V-ATPase B subunit is encoded by vha-12, which is located on the X chromosome. Usually, spe-5 mutants are self-sterile in a wild-type vha-12 background. However, an extrachromosomal transgene containing wild-type vha-12 driven by its own promoter allows spe-5 mutant hermaphrodites to produce progeny, indicating that VHA-12 can at least partially substitute for SPE-5. Others have shown that the X chromosome is transcriptionally silent in the male germline, so expression of the autosomally located spe-5 gene ensures that a V-ATPase B subunit is present during spermatogenesis.
Collapse
|
48
|
Vigil P, Barrientos VM, Vargas GG, Machuca DA, Cortés ME. Assessment of the effect of testosterone on the acrosome reaction of human spermatozoa. Andrologia 2011; 44 Suppl 1:627-33. [DOI: 10.1111/j.1439-0272.2011.01241.x] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
|
49
|
Koeberle A, Shindou H, Harayama T, Yuki K, Shimizu T. Polyunsaturated fatty acids are incorporated into maturating male mouse germ cells by lysophosphatidic acid acyltransferase 3. FASEB J 2011; 26:169-80. [DOI: 10.1096/fj.11-184879] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Andreas Koeberle
- Department of Biochemistry and Molecular BiologyFaculty of Medicine, University of Tokyo Tokyo Japan
| | - Hideo Shindou
- Department of Biochemistry and Molecular BiologyFaculty of Medicine, University of Tokyo Tokyo Japan
| | - Takeshi Harayama
- Department of Biochemistry and Molecular BiologyFaculty of Medicine, University of Tokyo Tokyo Japan
| | - Koichi Yuki
- Department of Biochemistry and Molecular BiologyFaculty of Medicine, University of Tokyo Tokyo Japan
| | - Takao Shimizu
- Department of Biochemistry and Molecular BiologyFaculty of Medicine, University of Tokyo Tokyo Japan
| |
Collapse
|
50
|
Roqueta-Rivera M, Abbott TL, Sivaguru M, Hess RA, Nakamura MT. Deficiency in the omega-3 fatty acid pathway results in failure of acrosome biogenesis in mice. Biol Reprod 2011; 85:721-32. [PMID: 21653892 DOI: 10.1095/biolreprod.110.089524] [Citation(s) in RCA: 59] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022] Open
Abstract
An omega-3 fatty acid, docosahexaenoic acid (DHA), is enriched in testicular membrane phospholipids, but its function is not well understood. The Fads2 gene encodes an enzyme required for the endogenous synthesis of DHA. Using Fads2-null mice (Fads2-/-), we found in our preceding studies that DHA deficiency caused the arrest of spermiogenesis and male infertility, both of which were reversed by dietary DHA. In this study, we investigated a cellular mechanism underlying the DHA essentiality in spermiogenesis. Periodic acid-Schiff staining and acrosin immunohistochemistry revealed the absence of acrosomes in Fads2-/- round spermatids. Acrosin, an acrosomal marker, was scattered throughout the cytoplasm of the Fads2-/- spermatids, and electron microscopy showed that proacrosomal granules were formed on the trans-face of the Golgi. However, excessive endoplasmic reticulum and vesicles were present on the cis-face of the Golgi in Fads2-/- spermatids. The presence of proacrosomal vesicles but lack of a developed acrosome in Fads2-/- spermatids suggested failed vesicle fusion. Syntaxin 2, a protein involved in vesicle fusion, colocalized with acrosin in the acrosome of wild-type mice. In contrast, syntaxin 2 remained scattered in reticular structures and showed no extensive colocalization with acrosin in the Fads2-/- spermatids, suggesting failed fusion with acrosin-containing vesicles or failed transport and release of syntaxin 2 vesicles from Golgi. Dietary supplementation of DHA in Fads2-/- mice restored an intact acrosome. In conclusion, acrosome biogenesis under DHA deficiency is halted after release of proacrosomal granules. Misplaced syntaxin 2 suggests an essential role of DHA in proper delivery of membrane proteins required for proacrosomal vesicle fusion.
Collapse
Affiliation(s)
- Manuel Roqueta-Rivera
- Department of Food Science & Human Nutrition, University of Illinois at Urbana-Champaign, Urbana, Illinois, USA
| | | | | | | | | |
Collapse
|