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Zhang Y, Liu G, Huang L, He X, Su Y, Nie X, Mao Z, Xing X. SUN5 interacts with nuclear membrane LaminB1 and cytoskeletal GTPase Septin12 mediating the sperm head-and-tail junction. Mol Hum Reprod 2024; 30:gaae022. [PMID: 38870534 DOI: 10.1093/molehr/gaae022] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2023] [Revised: 05/21/2024] [Indexed: 06/15/2024] Open
Abstract
Acephalic spermatozoa syndrome (ASS) is a severe teratospermia with decaudated, decapitated, and malformed sperm, resulting in male infertility. Nuclear envelope protein SUN5 localizes to the junction between the sperm head and tail. Mutations in the SUN5 gene have been identified most frequently (33-47%) in ASS cases, and its molecular mechanism of action is yet to be explored. In the present study, we generated Sun5 knockout mice, which presented the phenotype of ASS. Nuclear membrane protein LaminB1 and cytoskeletal GTPases Septin12 and Septin2 were identified as potential partners for interacting with SUN5 by immunoprecipitation-mass spectrometry in mouse testis. Further studies demonstrated that SUN5 connected the nucleus by interacting with LaminB1 and connected the proximal centriole by interacting with Septin12. The binding between SUN5 and Septin12 promoted their aggregation together in the sperm neck. The disruption of the LaminB1/SUN5/Septin12 complex by Sun5 deficiency caused separation of the Septin12-proximal centriole from the nucleus, leading to the breakage of the head-to-tail junction. Collectively, these data provide new insights into the pathogenesis of ASS caused by SUN5 deficiency.
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Affiliation(s)
- Yunfei Zhang
- Department of Laboratory Medicine, The Third Xiangya Hospital, Central South University, Changsha, China
- Center for Experimental Medicine, The Third Xiangya Hospital, Central South University, Changsha, China
| | - Gang Liu
- Institute of Reproduction and Stem Cell Engineering, Central South University, Changsha, China
| | - Lihua Huang
- Center for Experimental Medicine, The Third Xiangya Hospital, Central South University, Changsha, China
| | - Xiyi He
- Department of Laboratory Medicine, The Third Xiangya Hospital, Central South University, Changsha, China
- Center for Experimental Medicine, The Third Xiangya Hospital, Central South University, Changsha, China
| | - Yuyan Su
- Department of Laboratory Medicine, The Third Xiangya Hospital, Central South University, Changsha, China
- Center for Experimental Medicine, The Third Xiangya Hospital, Central South University, Changsha, China
| | - Xinmin Nie
- Department of Laboratory Medicine, The Third Xiangya Hospital, Central South University, Changsha, China
| | - Zenghui Mao
- Hunan Provincial Key Laboratory of Regional Hereditary Birth Defects Prevention and Control, Changsha Hospital for Maternal & Child Health Care Affiliated to Hunan Normal University, Changsha, China
| | - Xiaowei Xing
- Center for Experimental Medicine, The Third Xiangya Hospital, Central South University, Changsha, China
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2
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Song X, Li R, Liu G, Huang L, Li P, Feng W, Gao Q, Xing X. Nuclear Membrane Protein SUN5 Is Highly Expressed and Promotes Proliferation and Migration in Colorectal Cancer by Regulating the ERK Pathway. Cancers (Basel) 2022; 14:5368. [PMID: 36358787 PMCID: PMC9654567 DOI: 10.3390/cancers14215368] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2022] [Revised: 10/28/2022] [Accepted: 10/28/2022] [Indexed: 09/26/2023] Open
Abstract
SUN5 was first identified as a nuclear envelope protein involved in spermatocyte division. We found that SUN5 was highly expressed in some cancers, but its function and mechanism in cancer development remain unclear. In the present study, we demonstrated that SUN5 was highly expressed in colorectal cancer (CRC) tissues and cells, as indicated by bioinformatics analysis, and SUN5 promoted cell proliferation and migration in vitro. Moreover, the overexpression of SUN5 upregulated phosphorylated ERK1/2 (pERK1/2), whereas the knockdown of SUN5 yielded the opposite results. PD0325901 decreased the level of pERK1/2 to inhibit cell proliferation and migration, which was partially reversed by SUN5 overexpression, indicating that drug resistance existed in patients with high SUN5 expression. The xenograft transplantation experiment showed that SUN5 accelerated tumor formation in vivo. Furthermore, we found that SUN5 regulated the ERK pathway via Nesprin2 mediation and promoted the nuclear translocation of pERK1/2 by interacting with Nup93. Thus, these findings indicated that highly expressed SUN5 promoted CRC proliferation and migration by regulating the ERK pathway, which may contribute to the clinical diagnosis and new treatment strategies for CRC.
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Affiliation(s)
- Xiaoyue Song
- Center for Experimental Medicine, Third Xiangya Hospital, Central South University, Changsha 410013, China
- Department of Laboratory Medicine, Third Xiangya Hospital, Central South University, Changsha 410013, China
| | - Ruhong Li
- Department of General Surgery, Yanan Hospital Affiliated to Kunming Medical University, Kunming 650051, China
| | - Gang Liu
- The Institute of Reproduction and Stem Cell Engineering, School of Basic Medical Sciences, Central South University, Changsha 410078, China
| | - Lihua Huang
- Center for Experimental Medicine, Third Xiangya Hospital, Central South University, Changsha 410013, China
| | - Peng Li
- Department of General Surgery, Yanan Hospital Affiliated to Kunming Medical University, Kunming 650051, China
| | - Wanjiang Feng
- Center for Experimental Medicine, Third Xiangya Hospital, Central South University, Changsha 410013, China
| | - Qiujie Gao
- Center for Experimental Medicine, Third Xiangya Hospital, Central South University, Changsha 410013, China
- Department of Laboratory Medicine, Third Xiangya Hospital, Central South University, Changsha 410013, China
| | - Xiaowei Xing
- Center for Experimental Medicine, Third Xiangya Hospital, Central South University, Changsha 410013, China
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3
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Zhang Y, Yang L, Huang L, Liu G, Nie X, Zhang X, Xing X. SUN5 Interacting With Nesprin3 Plays an Essential Role in Sperm Head-to-Tail Linkage: Research on Sun5 Gene Knockout Mice. Front Cell Dev Biol 2021; 9:684826. [PMID: 34268309 PMCID: PMC8276135 DOI: 10.3389/fcell.2021.684826] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2021] [Accepted: 05/11/2021] [Indexed: 12/24/2022] Open
Abstract
Acephalic spermatozoa syndrome is a rare genetic and reproductive disease. Recent studies have shown that approximately 33–47% of patients with acephalic spermatozoa syndrome have SUN5 mutations, but the molecular mechanism underlying this phenomenon has not been elucidated. In this study, we generated Sun5 knockout mice and found that the head-to-tail linkage was broken in Sun5–/– mice, which was similar to human acephalic spermatozoa syndrome. Furthermore, ultrastructural imaging revealed that the head-tail coupling apparatus (HTCA) and the centrosome were distant from the nucleus at steps 9–10 during spermatid elongation. With the manchette disappearing at steps 13–14, the head and the tail segregated. To explore the molecular mechanism underlying this process, bioinformatic analysis was performed and showed that Sun5 may interact with Nesprin3. Further coimmunoprecipitation (Co-IP) and immunofluorescence assays confirmed that Sun5 and Nesprin3 were indeed bona fide interaction partners that formed the linker of the nucleoskeleton and cytoskeleton (LINC) complex participating in the connection of the head and tail of spermatozoa. Nesprin3 was located posterior and anterior to the nucleus during spermiogenesis in wild-type mice, whereas it lost its localization at the implantation fossa of the posterior region in Sun5–/– mice. Without correct localization of Nesprin3 at the nuclear membrane, the centrosome, which is the originator of the flagellum, was distant from the nucleus, which led to the separation of the head and tail. In addition, isobaric tag for relative and absolute quantitation results showed that 47 proteins were upregulated, and 56 proteins were downregulated, in the testis in Sun5–/– mice, and the downregulation of spermatogenesis-related proteins (Odf1 and Odf2) may also contribute to the damage to the spermatozoa head-to-tail linkage. Our findings suggested that Sun5 is essential for the localization of Nesprin3 at the posterior nuclear membrane, which plays an essential role in the sperm head-tail connection.
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Affiliation(s)
- Yunfei Zhang
- Center for Experimental Medicine, The Third Xiangya Hospital, Central South University, Changsha, China.,Department of Laboratory Medicine, The Third Xiangya Hospital, Central South University, Changsha, China
| | - Linfei Yang
- Center for Experimental Medicine, The Third Xiangya Hospital, Central South University, Changsha, China
| | - Lihua Huang
- Center for Experimental Medicine, The Third Xiangya Hospital, Central South University, Changsha, China
| | - Gang Liu
- The Institute of Reproduction and Stem Cell Engineering, Central South University, Changsha, China
| | - Xinmin Nie
- Department of Laboratory Medicine, The Third Xiangya Hospital, Central South University, Changsha, China
| | - Xinxing Zhang
- Center for Experimental Medicine, The Third Xiangya Hospital, Central South University, Changsha, China.,Department of Laboratory Medicine, The Third Xiangya Hospital, Central South University, Changsha, China
| | - Xiaowei Xing
- Center for Experimental Medicine, The Third Xiangya Hospital, Central South University, Changsha, China
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Manfrevola F, Guillou F, Fasano S, Pierantoni R, Chianese R. LINCking the Nuclear Envelope to Sperm Architecture. Genes (Basel) 2021; 12:genes12050658. [PMID: 33925685 PMCID: PMC8145172 DOI: 10.3390/genes12050658] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2021] [Revised: 04/13/2021] [Accepted: 04/24/2021] [Indexed: 12/11/2022] Open
Abstract
Nuclear architecture undergoes an extensive remodeling during spermatogenesis, especially at levels of spermatocytes (SPC) and spermatids (SPT). Interestingly, typical events of spermiogenesis, such as nuclear elongation, acrosome biogenesis, and flagellum formation, need a functional cooperation between proteins of the nuclear envelope and acroplaxome/manchette structures. In addition, nuclear envelope plays a key role in chromosome distribution. In this scenario, special attention has been focused on the LINC (linker of nucleoskeleton and cytoskeleton) complex, a nuclear envelope-bridge structure involved in the connection of the nucleoskeleton to the cytoskeleton, governing mechanotransduction. It includes two integral proteins: KASH- and SUN-domain proteins, on the outer (ONM) and inner (INM) nuclear membrane, respectively. The LINC complex is involved in several functions fundamental to the correct development of sperm cells such as head formation and head to tail connection, and, therefore, it seems to be important in determining male fertility. This review provides a global overview of the main LINC complex components, with a special attention to their subcellular localization in sperm cells, their roles in the regulation of sperm morphological maturation, and, lastly, LINC complex alterations associated to male infertility.
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Affiliation(s)
- Francesco Manfrevola
- Dipartimento di Medicina Sperimentale, Università degli Studi della Campania L. Vanvitelli, Via Costantinopoli 16, 80138 Napoli, Italy; (F.M.); (S.F.); (R.P.)
| | - Florian Guillou
- PRC, CNRS, IFCE, INRAE, University of Tours, 37380 Nouzilly, France;
| | - Silvia Fasano
- Dipartimento di Medicina Sperimentale, Università degli Studi della Campania L. Vanvitelli, Via Costantinopoli 16, 80138 Napoli, Italy; (F.M.); (S.F.); (R.P.)
| | - Riccardo Pierantoni
- Dipartimento di Medicina Sperimentale, Università degli Studi della Campania L. Vanvitelli, Via Costantinopoli 16, 80138 Napoli, Italy; (F.M.); (S.F.); (R.P.)
| | - Rosanna Chianese
- Dipartimento di Medicina Sperimentale, Università degli Studi della Campania L. Vanvitelli, Via Costantinopoli 16, 80138 Napoli, Italy; (F.M.); (S.F.); (R.P.)
- Correspondence:
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Zhang D, Huang WJ, Chen GY, Dong LH, Tang Y, Zhang H, Li QQ, Mei XY, Wang ZH, Lan FH. Pathogenesis of acephalic spermatozoa syndrome caused by SUN5 variant. Mol Hum Reprod 2021; 27:6225007. [PMID: 33848337 DOI: 10.1093/molehr/gaab028] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2020] [Revised: 02/26/2021] [Indexed: 02/04/2023] Open
Abstract
Acephalic spermatozoa syndrome (ASS) is a rare teratozoospermia that leads to male infertility. Previous work suggested a genetic origin. Variants of Sad1 and UNC84 domain containing 5 (SUN5) are the main genetic cause of ASS; however, its pathogenesis remains unclear. Here, we performed whole-exome sequencing in 10 unrelated ASS and identified 2 homozygous variants, c.381delA[p.V128Sfs7*] and c.675C>A[p.Y225X], and 1 compound variant, c.88 C > T[p.R30X] and c.381 delA [p.V128Sfs7*], in SUN5 in 4 patients. The c.381delA variant had been identified as pathogenic in previous reports, while c.675C>A and c.88 C > T were two novel variants which could lead to a premature termination codon (PTC) and resulted in loss of SUN5, and may also be pathogenic. SUN5 mRNA and protein were present at very low levels in ASS patients with SUN5 nonsense mutation. Furthermore, the distribution of outer dense fiber protein 1 (ODF1) and Nesprin3 was altered in sperm of ASS patients with SUN5 variants. The co-immunoprecipitation analysis indicated that SUN5 and ODF1, SUN5 and Nesprin3, and ODF1 and Nesprin3 interacted with each other in transfected HEK293T cells. Thus, we propose that SUN5, Nesprin3, and ODF1 may form a 'triplet' structure through interactions at neck of sperm. When gene variants resulted in a loss of SUN5, the 'triplet' structure disappears and then the head-tail junction becomes fragile, leading to the occurrence of ASS.
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Affiliation(s)
- Duo Zhang
- Laboratory of Basic Medicine, Dongfang Hospital (900th Hospital of the Joint Logistics Team), Xiamen University, Fuzhou, China.,Laboratory of Basic Medicine, Fuzong Clinical College of Fujian Medical University, Fuzhou, China.,Fujian Provincial Key Laboratory of Transplant Biology, Dongfang Hospital (900th Hospital of the Joint Logistics Team), Xiamen University, Fuzhou, China
| | - Wu-Jian Huang
- Center for Reproductive Medicine, Dongfang Hospital (900th Hospital of the Joint Logistics Team), Xiamen University, Fuzhou, China.,Center for Reproductive Medicine, Fuzong Clinical College of Fujian Medical University, Fuzhou, China
| | - Guo-Yong Chen
- Center for Reproductive Medicine, Dongfang Hospital (900th Hospital of the Joint Logistics Team), Xiamen University, Fuzhou, China.,Center for Reproductive Medicine, Fuzong Clinical College of Fujian Medical University, Fuzhou, China
| | - Li-Hong Dong
- The Department of Clinical Laboratory, Fuzong Clinical College of Fujian University, Fuzhou, China
| | - Ying Tang
- Laboratory of Basic Medicine, Dongfang Hospital (900th Hospital of the Joint Logistics Team), Xiamen University, Fuzhou, China.,Laboratory of Basic Medicine, Fuzong Clinical College of Fujian Medical University, Fuzhou, China.,Fujian Provincial Key Laboratory of Transplant Biology, Dongfang Hospital (900th Hospital of the Joint Logistics Team), Xiamen University, Fuzhou, China
| | - Hui Zhang
- Laboratory of Basic Medicine, Dongfang Hospital (900th Hospital of the Joint Logistics Team), Xiamen University, Fuzhou, China.,Laboratory of Basic Medicine, Fuzong Clinical College of Fujian Medical University, Fuzhou, China.,Fujian Provincial Key Laboratory of Transplant Biology, Dongfang Hospital (900th Hospital of the Joint Logistics Team), Xiamen University, Fuzhou, China
| | - Qing-Qin Li
- Laboratory of Basic Medicine, Dongfang Hospital (900th Hospital of the Joint Logistics Team), Xiamen University, Fuzhou, China.,Laboratory of Basic Medicine, Fuzong Clinical College of Fujian Medical University, Fuzhou, China.,Fujian Provincial Key Laboratory of Transplant Biology, Dongfang Hospital (900th Hospital of the Joint Logistics Team), Xiamen University, Fuzhou, China
| | - Xiao-Yan Mei
- Center for Reproductive Medicine, Dongfang Hospital (900th Hospital of the Joint Logistics Team), Xiamen University, Fuzhou, China.,Center for Reproductive Medicine, Fuzong Clinical College of Fujian Medical University, Fuzhou, China
| | - Zhi-Hong Wang
- Laboratory of Basic Medicine, Dongfang Hospital (900th Hospital of the Joint Logistics Team), Xiamen University, Fuzhou, China.,Laboratory of Basic Medicine, Fuzong Clinical College of Fujian Medical University, Fuzhou, China.,Fujian Provincial Key Laboratory of Transplant Biology, Dongfang Hospital (900th Hospital of the Joint Logistics Team), Xiamen University, Fuzhou, China
| | - Feng-Hua Lan
- Laboratory of Basic Medicine, Dongfang Hospital (900th Hospital of the Joint Logistics Team), Xiamen University, Fuzhou, China.,Laboratory of Basic Medicine, Fuzong Clinical College of Fujian Medical University, Fuzhou, China.,Fujian Provincial Key Laboratory of Transplant Biology, Dongfang Hospital (900th Hospital of the Joint Logistics Team), Xiamen University, Fuzhou, China
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6
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The SUN2-nesprin-2 LINC complex and KIF20A function in the Golgi dispersal. Sci Rep 2021; 11:5358. [PMID: 33686165 PMCID: PMC7940470 DOI: 10.1038/s41598-021-84750-4] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2020] [Accepted: 02/12/2021] [Indexed: 01/31/2023] Open
Abstract
The morphology of the Golgi complex is influenced by the cellular context, which strictly correlates with nuclear functions; however, the mechanism underlying this association remains elusive. The inner nuclear membrane SUN proteins, SUN1 and SUN2, have diverse functions together with the outer nuclear membrane nesprin proteins, which comprise the LINC complex. We found that depletion of SUN1 leads to Golgi complex dispersion with maintenance of ministacks and retained function for vesicle transport through the Golgi complex. In addition, SUN2 associates with microtubule plus-end-directed motor KIF20A, possibly via nesprin-2. KIF20A plays a role in the Golgi dispersion in conjunction with the SUN2-nesprin-2 LINC complex in SUN1-depleted cells, suggesting that SUN1 suppresses the function of the SUN2-nesprin-2 LINC complex under a steady-state condition. Further, SUN1-knockout mice, which show impaired cerebellar development and cerebellar ataxia, presented altered Golgi morphology in Purkinje cells. These findings revealed a regulation of the Golgi organization by the LINC complex.
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Cazin C, Boumerdassi Y, Martinez G, Fourati Ben Mustapha S, Whitfield M, Coutton C, Thierry-Mieg N, Di Pizio P, Rives N, Arnoult C, Touré A, Ray PF, Zouari R, Sifer C, Kherraf ZE. Identification and Characterization of the Most Common Genetic Variant Responsible for Acephalic Spermatozoa Syndrome in Men Originating from North Africa. Int J Mol Sci 2021; 22:ijms22042187. [PMID: 33671757 PMCID: PMC7927044 DOI: 10.3390/ijms22042187] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2021] [Revised: 02/15/2021] [Accepted: 02/18/2021] [Indexed: 12/29/2022] Open
Abstract
Acephalic spermatozoa syndrome (ASS) is a rare but extremely severe type of teratozoospermia, defined by the presence of a majority of headless flagella and a minority of tail-less sperm heads in the ejaculate. Like the other severe monomorphic teratozoospermias, ASS has a strong genetic basis and is most often caused by bi-allelic variants in SUN5 (Sad1 and UNC84 domain-containing 5). Using whole exome sequencing (WES), we investigated a cohort of nine infertile subjects displaying ASS. These subjects were recruited in three centers located in France and Tunisia, but all originated from North Africa. Sperm from subjects carrying candidate genetic variants were subjected to immunofluorescence analysis and transmission electron microscopy. Moreover, fluorescent in situ hybridization (FISH) was performed on sperm nuclei to assess their chromosomal content. Variant filtering permitted us to identify the same SUN5 homozygous frameshift variant (c.211+1_211+2dup) in 7/9 individuals (78%). SUN5 encodes a protein localized on the posterior part of the nuclear envelope that is necessary for the attachment of the tail to the sperm head. Immunofluorescence assays performed on sperm cells from three mutated subjects revealed a total absence of SUN5, thus demonstrating the deleterious impact of the identified variant on protein expression. Transmission electron microscopy showed a conserved flagellar structure and a slightly decondensed chromatin. FISH did not highlight a higher rate of chromosome aneuploidy in spermatozoa from SUN5 patients compared to controls, indicating that intra-cytoplasmic sperm injection (ICSI) can be proposed for patients carrying the c.211+1_211+2dup variant. These results suggest that the identified SUN5 variant is the main cause of ASS in the North African population. Consequently, a simple and inexpensive genotyping of the 211+1_211+2dup variant could be beneficial for affected men of North African origin before resorting to more exhaustive genetic analyses.
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Affiliation(s)
- Caroline Cazin
- Institute for Advanced Biosciences, INSERM, CNRS, Université Grenoble Alpes, F-38000 Grenoble, France; (C.C.); (G.M.); (M.W.); (C.C.); (C.A.); (A.T.); (P.F.R.)
- UM GI-DPI, CHU Grenoble Alpes, F-38000 Grenoble, France
| | - Yasmine Boumerdassi
- Department of Reproductive Biology, Hôpital Jean Verdier, Assistance Publique, Hôpitaux de Paris, F-75004 Paris, France; (Y.B.); (C.S.)
| | - Guillaume Martinez
- Institute for Advanced Biosciences, INSERM, CNRS, Université Grenoble Alpes, F-38000 Grenoble, France; (C.C.); (G.M.); (M.W.); (C.C.); (C.A.); (A.T.); (P.F.R.)
- UM de Génétique Chromosomique, CHU Grenoble Alpes, F-38000 Grenoble, France
| | - Selima Fourati Ben Mustapha
- Centre d’Aide Médicale à la Procréation, Polyclinique les Jasmin, Centre Urbain Nord, Tunis 1003, Tunisia; (S.F.B.M.); (R.Z.)
| | - Marjorie Whitfield
- Institute for Advanced Biosciences, INSERM, CNRS, Université Grenoble Alpes, F-38000 Grenoble, France; (C.C.); (G.M.); (M.W.); (C.C.); (C.A.); (A.T.); (P.F.R.)
| | - Charles Coutton
- Institute for Advanced Biosciences, INSERM, CNRS, Université Grenoble Alpes, F-38000 Grenoble, France; (C.C.); (G.M.); (M.W.); (C.C.); (C.A.); (A.T.); (P.F.R.)
- Department of Reproductive Biology, Hôpital Jean Verdier, Assistance Publique, Hôpitaux de Paris, F-75004 Paris, France; (Y.B.); (C.S.)
| | | | - Pierre Di Pizio
- EA 4308 ‘Gametogenesis and Gamete Quality, Normandie University, UNIROUEN, F-76000 Rouen, France; (P.D.P.); (N.R.)
- Reproductive Biology Laboratory-CECOS, Assisted Reproductive Center, Rouen Normandy University Hospital, F-76000 Rouen, France
| | - Nathalie Rives
- EA 4308 ‘Gametogenesis and Gamete Quality, Normandie University, UNIROUEN, F-76000 Rouen, France; (P.D.P.); (N.R.)
- Reproductive Biology Laboratory-CECOS, Assisted Reproductive Center, Rouen Normandy University Hospital, F-76000 Rouen, France
| | - Christophe Arnoult
- Institute for Advanced Biosciences, INSERM, CNRS, Université Grenoble Alpes, F-38000 Grenoble, France; (C.C.); (G.M.); (M.W.); (C.C.); (C.A.); (A.T.); (P.F.R.)
| | - Aminata Touré
- Institute for Advanced Biosciences, INSERM, CNRS, Université Grenoble Alpes, F-38000 Grenoble, France; (C.C.); (G.M.); (M.W.); (C.C.); (C.A.); (A.T.); (P.F.R.)
| | - Pierre F. Ray
- Institute for Advanced Biosciences, INSERM, CNRS, Université Grenoble Alpes, F-38000 Grenoble, France; (C.C.); (G.M.); (M.W.); (C.C.); (C.A.); (A.T.); (P.F.R.)
- UM GI-DPI, CHU Grenoble Alpes, F-38000 Grenoble, France
| | - Raoudha Zouari
- Centre d’Aide Médicale à la Procréation, Polyclinique les Jasmin, Centre Urbain Nord, Tunis 1003, Tunisia; (S.F.B.M.); (R.Z.)
| | - Christophe Sifer
- Department of Reproductive Biology, Hôpital Jean Verdier, Assistance Publique, Hôpitaux de Paris, F-75004 Paris, France; (Y.B.); (C.S.)
| | - Zine-Eddine Kherraf
- Institute for Advanced Biosciences, INSERM, CNRS, Université Grenoble Alpes, F-38000 Grenoble, France; (C.C.); (G.M.); (M.W.); (C.C.); (C.A.); (A.T.); (P.F.R.)
- UM GI-DPI, CHU Grenoble Alpes, F-38000 Grenoble, France
- Correspondence:
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8
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Mazaheri Moghaddam M, Mazaheri Moghaddam M, Hamzeiy H, Baghbanzadeh A, Pashazadeh F, Sakhinia E. Genetic basis of acephalic spermatozoa syndrome, and intracytoplasmic sperm injection outcomes in infertile men: a systematic scoping review. J Assist Reprod Genet 2021; 38:573-586. [PMID: 33452591 DOI: 10.1007/s10815-020-02008-w] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2020] [Accepted: 11/08/2020] [Indexed: 12/23/2022] Open
Abstract
PURPOSE Acephalic spermatozoa syndrome (ASS) is known as a severe type of teratozoospermia, defined as semen composed of mostly headless spermatozoa that affect male fertility. In this regard, this systematic review aimed to discuss gene variants associated with acephalic spermatozoa phenotype as well as the clinical outcomes of intracytoplasmic sperm injection (ICSI) treatment for the acephalic spermatozoa-associated male infertility. METHODS A systematic search was performed on PubMed, Embase, Scopus, and Ovid databases until May 17, 2020. This systematic scoping review was reported in terms of the Preferred Reporting Items for Systematic reviews and Meta-Analyses extension for Scoping Reviews (PRISMA-ScR) statement. RESULTS Twenty articles were included in this systematic review. Whole-exome and Sanger sequencing have helped in the identification of variants in SUN5, PMFBP1, BRDT, TSGA10, DNAH6, HOOK1, and CEP112 genes as possible causes of this phenotype in humans. The results of the ICSI are conflicting due to both positive and negative reports of ICSI outcomes. CONCLUSION ASS has a genetic origin, and several genetic alterations related to the pathogenesis of this anomaly have been recently identified. Notably, only SUN5 and PMFBP1 mutations are well-known to be implicated in ASS. Accordingly, more functional studies are needed to confirm the pathogenicity of other variants. ICSI could provide a promising treatment for acephalic spermatozoa-associated male infertility. Besides the importance of sperm head-tail junction integrity, some other factors, whether within the sperm cell or female factors, may be involved in the ICSI outcome.
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Affiliation(s)
- Marziyeh Mazaheri Moghaddam
- Immunology Research Center, Tabriz University of Medical Sciences, Tabriz, Iran.,Department of Medical Genetics, Faculty of Medicine, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Madiheh Mazaheri Moghaddam
- Department of Genetics and Molecular Medicine, School of Medicine, Zanjan University of Medical Sciences (ZUMS), Zanjan, Iran
| | - Hamid Hamzeiy
- Tabriz Genetic Analysis Centre (TGAC), Tabriz University of Medical Sciences, Tabriz, Iran.,Genomize Inc., Istanbul, Turkey
| | - Amir Baghbanzadeh
- Immunology Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Fariba Pashazadeh
- Research Center for Evidence-Based Medicine, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Ebrahim Sakhinia
- Department of Medical Genetics, Faculty of Medicine, Tabriz University of Medical Sciences, Tabriz, Iran. .,Tabriz Genetic Analysis Centre (TGAC), Tabriz University of Medical Sciences, Tabriz, Iran.
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9
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Kmonickova V, Frolikova M, Steger K, Komrskova K. The Role of the LINC Complex in Sperm Development and Function. Int J Mol Sci 2020; 21:E9058. [PMID: 33260574 PMCID: PMC7730847 DOI: 10.3390/ijms21239058] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2020] [Revised: 11/24/2020] [Accepted: 11/26/2020] [Indexed: 11/23/2022] Open
Abstract
The LINC (LInker of Nucleoskeleton and Cytoskeleton) complex is localized within the nuclear envelope and consists of SUN (Sad1/UNc84 homology domain-containing) proteins located in the inner nuclear membrane and KASH (Klarsicht/Anc1/Syne1 homology domain-containing) proteins located in the outer nuclear membrane, hence linking nuclear with cytoplasmic structures. While the nucleoplasm-facing side acts as a key player for correct pairing of homolog chromosomes and rapid chromosome movements during meiosis, the cytoplasm-facing side plays a pivotal role for sperm head development and proper acrosome formation during spermiogenesis. A further complex present in spermatozoa is involved in head-to-tail coupling. An intact LINC complex is crucial for the production of fertile sperm, as mutations in genes encoding for complex proteins are known to be associated with male subfertility in both mice and men. The present review provides a comprehensive overview on our current knowledge of LINC complex subtypes present in germ cells and its central role for male reproduction. Future studies on distinct LINC complex components are an absolute requirement to improve the diagnosis of idiopathic male factor infertility and the outcome of assisted reproduction.
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Affiliation(s)
- Vera Kmonickova
- Laboratory of Reproductive Biology, Institute of Biotechnology of the Czech Academy of Sciences, BIOCEV, Prumyslova 595, 252 50 Vestec, Czech Republic; (V.K.); (M.F.)
| | - Michaela Frolikova
- Laboratory of Reproductive Biology, Institute of Biotechnology of the Czech Academy of Sciences, BIOCEV, Prumyslova 595, 252 50 Vestec, Czech Republic; (V.K.); (M.F.)
| | - Klaus Steger
- Department of Urology, Pediatric Urology and Andrology, Molecular Andrology, Justus-Liebig University, 35392 Giessen, Germany;
| | - Katerina Komrskova
- Laboratory of Reproductive Biology, Institute of Biotechnology of the Czech Academy of Sciences, BIOCEV, Prumyslova 595, 252 50 Vestec, Czech Republic; (V.K.); (M.F.)
- Department of Zoology, Faculty of Science, Charles University, Vinicna 7, 128 44 Prague 2, Czech Republic
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10
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Satomi E, Ueda M, Katahira J, Hieda M. The SUN1 splicing variants SUN1_888 and SUN1_916 differentially regulate nucleolar structure. Genes Cells 2020; 25:730-740. [PMID: 32931086 DOI: 10.1111/gtc.12807] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2020] [Revised: 08/27/2020] [Accepted: 09/07/2020] [Indexed: 12/22/2022]
Abstract
The nucleolar structure is highly dynamic and strictly regulated in response to internal cues, such as metabolic rates, and to external cues, such as mechanical forces applied to cells. Although the multilayered nucleolar structure is largely determined by the liquid-like properties of RNA and proteins, the mechanisms regulating the morphology and number of nucleoli remain elusive. The linker of the nucleoskeleton and cytoskeleton (LINC) complex comprises inner nuclear membrane Sad1/UNC-84 (SUN) proteins and outer nuclear membrane-localized nesprins. We previously showed that the depletion of SUN1 proteins affects nucleolar morphologies. This study focuses on the function of SUN1 splicing variants in determining nucleolar morphology. An RNA interference strategy showed that the predominantly expressed variants, SUN1_888 and SUN1_916, were crucial for nucleolar morphology but functionally distinct. In addition, the depletion of either SUN1_888 or SUN1_916 altered the chromatin structure and affected the distribution of histone modifications. Based on these results, we propose a model in which the LINC complex plays a role in modulating nucleolar morphology and numbers via chromatin.
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Affiliation(s)
- Erina Satomi
- Graduate School of Health Sciences, Ehime Prefectural University of Health Sciences, Ehime, Japan
| | - Masako Ueda
- Graduate School of Health Sciences, Ehime Prefectural University of Health Sciences, Ehime, Japan
| | - Jun Katahira
- Department of Veterinary Sciences, Osaka Prefecture University, Osaka, Japan
| | - Miki Hieda
- Graduate School of Health Sciences, Ehime Prefectural University of Health Sciences, Ehime, Japan
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11
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Zhao G, Xu Y, Ouyang H, Luo Y, Sun S, Wang Z, Yang J, Jin C. Protein O-mannosylation affects protein secretion, cell wall integrity and morphogenesis in Trichoderma reesei. Fungal Genet Biol 2020; 144:103440. [PMID: 32758529 DOI: 10.1016/j.fgb.2020.103440] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2019] [Revised: 07/23/2020] [Accepted: 07/29/2020] [Indexed: 10/23/2022]
Abstract
Protein O-mannosyltransferases (PMTs) initiate O-mannosylation of proteins in the ER. Trichoderma reesei strains displayed a single representative of each PMT subfamily, Trpmt1, Trpmt2 and Trpmt4. In this work, two knockout strains ΔTrpmt1and ΔTrpmt4were obtained. Both mutants showed retarded growth, defective cell walls, reduced conidiation and decreased protein secretion. Additionally, the ΔTrpmt1strain displayed a thermosensitive growth phenotype, while the ΔTrpmt4 strain showed abnormal polarity. Meanwhile, OETrpmt2 strain, in which the Trpmt2 was over-expressed, exhibited increased conidiation, enhanced protein secretion and abnormal polarity. Using a lectin enrichment method and MS/MS analysis, 173 O-glycoproteins, 295 O-glycopeptides and 649 O-mannosylation sites were identified as the targets of PMTs in T. reesei. These identified O-mannoproteins are involved in various physiological processes such as protein folding, sorting, transport, quality control and secretion, as well as cell wall integrity and polarity. By comparing proteins identified in the mutants and its parent strain, the potential specific protein substrates of PMTs were identified. Based on our results, TrPMT1 is specifically involved inO-mannosylation of intracellular soluble proteins and secreted proteins, specially glycosidases. TrPMT2 is involved inO-mannosylation of secreted proteins and GPI-anchor proteins, and TrPMT4 mainly modifies multiple transmembrane proteins. The TrPMT1-TrPMT4 complex is responsible for O-mannosylation of proteins involved in cell wall integrity. Overexpression of TrPMT2 enhances protein secretion, which might be a new strategy to improve expression efficiency in T. reesei.
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Affiliation(s)
- Guangya Zhao
- State Key Laboratory of Mycology, Institute of Microbiology, Chinese Academy of Sciences, Beijing 100101, China; University of Chinese Academy of Sciences, Beijing, China
| | - Yueqiang Xu
- State Key Laboratory of Mycology, Institute of Microbiology, Chinese Academy of Sciences, Beijing 100101, China; University of Chinese Academy of Sciences, Beijing, China
| | - Haomiao Ouyang
- State Key Laboratory of Mycology, Institute of Microbiology, Chinese Academy of Sciences, Beijing 100101, China
| | - Yuanming Luo
- Public Technology Service Center, Institute of Microbiology, Chinese Academy of Sciences, Beijing 100101, China
| | - Shutao Sun
- Public Technology Service Center, Institute of Microbiology, Chinese Academy of Sciences, Beijing 100101, China
| | - Zhongfu Wang
- College of Food Science and Technology, Northwest University, Xi'an 710069, China
| | - Jinghua Yang
- State Key Laboratory of Mycology, Institute of Microbiology, Chinese Academy of Sciences, Beijing 100101, China
| | - Cheng Jin
- State Key Laboratory of Mycology, Institute of Microbiology, Chinese Academy of Sciences, Beijing 100101, China; University of Chinese Academy of Sciences, Beijing, China; National Engineering Research Center for Non-food Bio-refinery, Guangxi Academy of Sciences, Nanning 530007, Guangxi, China.
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12
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Ramroach S, John M, Joshi A. Lung cancer type classification using differentiator genes. GENE REPORTS 2020. [DOI: 10.1016/j.genrep.2020.100647] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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13
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Li X, Wu Y, Huang L, Yang L, Xing X. SPAG4L/SPAG4Lβ interacts with Nesprin2 to participate in the meiosis of spermatogenesis. Acta Biochim Biophys Sin (Shanghai) 2019; 51:669-676. [PMID: 31144711 DOI: 10.1093/abbs/gmz051] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2018] [Indexed: 01/10/2023] Open
Abstract
SUN domain proteins are identified as a novel family of nuclear envelope proteins which are involved in spermatogenesis. SPAG4L is identified as the fifth member of this family. Previous studies have revealed that SPAG4L is involved in spermatogenesis and the mutations occurring in SPAG4L will lead to male infertility. However, the transcriptions of SPAG4L and its interacting proteins in the testis are still unclear. In this study, we identified a shorter transcript variant of SPAG4L, named SPAG4Lβ, in human testis by northern blot and reverse transcription-polymerase chain reaction. Bioinformatics analysis showed that it encodes a protein consisting of 311 amino acids, and subcellular localization analysis revealed that it is mainly expressed in the cytoplasm. In situ hybridization and immunofluorescence assay revealed that SPAG4L/SPAG4Lβ is involved in meiosis. Furthermore, co-IP results demonstrated that SPAG4L/SPAG4Lβ interacts with Nesprin2, a KASH domain protein to form the LINC (linker of nucleoskeleton and cytoskeleton) complexes. Immunofluorescence results revealed that the LINC complexes of Spag4l/Nesprin2 in mouse are involved in spermatocyte division. Our data indicated that SPAG4L/SPAG4Lβ may play an important role in the meiotic process.
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Affiliation(s)
- Xiaohua Li
- Center for Medical Experiments, Third Xiangya Hospital of Central South University, Changsha, China
- Clinical Laboratory, Third Xiangya Hospital of Central South University, Changsha, China
| | - Yong Wu
- Clinical Laboratory, Third Xiangya Hospital of Central South University, Changsha, China
| | - Lihua Huang
- Center for Medical Experiments, Third Xiangya Hospital of Central South University, Changsha, China
| | - Linfei Yang
- Center for Medical Experiments, Third Xiangya Hospital of Central South University, Changsha, China
| | - Xiaowei Xing
- Center for Medical Experiments, Third Xiangya Hospital of Central South University, Changsha, China
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14
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Hieda M. Signal Transduction across the Nuclear Envelope: Role of the LINC Complex in Bidirectional Signaling. Cells 2019; 8:cells8020124. [PMID: 30720758 PMCID: PMC6406650 DOI: 10.3390/cells8020124] [Citation(s) in RCA: 33] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2018] [Revised: 02/01/2019] [Accepted: 02/01/2019] [Indexed: 12/14/2022] Open
Abstract
The primary functions of the nuclear envelope are to isolate the nucleoplasm and its contents from the cytoplasm as well as maintain the spatial and structural integrity of the nucleus. The nuclear envelope also plays a role in the transfer of various molecules and signals to and from the nucleus. To reach the nucleus, an extracellular signal must be transmitted across three biological membranes: the plasma membrane, as well as the inner and outer nuclear membranes. While signal transduction across the plasma membrane is well characterized, signal transduction across the nuclear envelope, which is essential for cellular functions such as transcriptional regulation and cell cycle progression, remains poorly understood. As a physical entity, the nuclear envelope, which contains more than 100 proteins, functions as a binding scaffold for both the cytoskeleton and the nucleoskeleton, and acts in mechanotransduction by relaying extracellular signals to the nucleus. Recent results show that the Linker of Nucleoskeleton and Cytoskeleton (LINC) complex, which is a conserved molecular bridge that spans the nuclear envelope and connects the nucleoskeleton and cytoskeleton, is also capable of transmitting information bidirectionally between the nucleus and the cytoplasm. This short review discusses bidirectional signal transduction across the nuclear envelope, with a particular focus on mechanotransduction.
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Affiliation(s)
- Miki Hieda
- Department of Medical Technology, Ehime Prefectural University of Health Sciences, 543 Takooda, Tobecho,Ehime 791-2102, Japan.
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15
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Pereira CD, Serrano JB, Martins F, da Cruz E Silva OAB, Rebelo S. Nuclear envelope dynamics during mammalian spermatogenesis: new insights on male fertility. Biol Rev Camb Philos Soc 2019; 94:1195-1219. [PMID: 30701647 DOI: 10.1111/brv.12498] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2018] [Revised: 01/04/2019] [Accepted: 01/08/2019] [Indexed: 02/06/2023]
Abstract
The production of highly specialized spermatozoa from undifferentiated spermatogonia is a strictly organized and programmed process requiring extensive restructuring of the entire cell. One of the most remarkable cellular transformations accompanying the various phases of spermatogenesis is the profound remodelling of the nuclear architecture, in which the nuclear envelope (NE) seems to be crucially involved. In recent years, several proteins from the distinct layers forming the NE (i.e. the inner and outer nuclear membranes as well as the nuclear lamina) have been associated with meiosis and/or spermiogenesis in different mammalian species. Among these are A- and B-type lamins, Dpy-19-like protein 2 (DPY19L2), lamin B receptor (LBR), lamina-associated polypeptide 1 (LAP1), LAP2/emerin/MAN1 (LEM) domain-containing proteins, spermatogenesis-associated 46 (SPATA46) and diverse elements of the linker of nucleoskeleton and cytoskeleton (LINC) complex, namely Sad-1/UNC-84 homology (SUN) and Klarsicht/ANC-1/Syne-1 homology (KASH) domain-containing proteins. Herein, we summarize the current state of the art on the cellular and subcellular distribution of NE proteins expressed during mammalian spermatogenesis, and discuss the latest research developments regarding their testis-specific functions. This review provides a comprehensive and innovative overview of the NE network as a regulatory platform and as an essential determinant of efficient meiotic chromosome recombination as well as spermiogenesis-associated nuclear remodelling and differentiation in mammalian male germline cells. Thus, this review provides important novel insights on the biological relevance of NE proteins for male fertility.
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Affiliation(s)
- Cátia D Pereira
- Department of Medical Sciences, Neuroscience and Signalling Laboratory, Institute for Biomedicine (iBiMED), University of Aveiro, 3810-193 Aveiro, Portugal
| | - Joana B Serrano
- Department of Medical Sciences, Neuroscience and Signalling Laboratory, Institute for Biomedicine (iBiMED), University of Aveiro, 3810-193 Aveiro, Portugal
| | - Filipa Martins
- Department of Medical Sciences, Neuroscience and Signalling Laboratory, Institute for Biomedicine (iBiMED), University of Aveiro, 3810-193 Aveiro, Portugal
| | - Odete A B da Cruz E Silva
- Department of Medical Sciences, Neuroscience and Signalling Laboratory, Institute for Biomedicine (iBiMED), University of Aveiro, 3810-193 Aveiro, Portugal.,The Discovery CTR, University of Aveiro Campus, 3810-193 Aveiro, Portugal
| | - Sandra Rebelo
- Department of Medical Sciences, Neuroscience and Signalling Laboratory, Institute for Biomedicine (iBiMED), University of Aveiro, 3810-193 Aveiro, Portugal
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16
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Shah MNA, Arabia S, Islam T, Ghosh A. Molecular evolution of SUN-domain containing proteins in diverse plant species and their expression profiling in response to developmental and perturbation stimuli. PHYTOCHEMISTRY 2019; 157:28-42. [PMID: 30359793 DOI: 10.1016/j.phytochem.2018.10.007] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/04/2018] [Revised: 10/04/2018] [Accepted: 10/06/2018] [Indexed: 06/08/2023]
Abstract
SUN (Sad1/UNC-84) domain-containing proteins are highly conserved throughout evolution. They are localized to the inner membrane of the nuclear envelope and are involved in nuclear migration and nucleoskeleton formation. In the present study, a genome-wide investigation was performed in three dicotyledonous (Arabidopsis thaliana, Glycine max and Medicago truncatula) and three monocotyledonous (Oryza sativa, Zea mays and Sorghum bicolor) plants. A total of 56 SUN proteins encoded by 30 genes were identified. Based on their length, transmembrane topology, conserved domains and phylogenetic relationships, they could be divided into two previously defined groups- Cter-SUN and mid-SUN proteins. Expression of these genes was analyzed in different developmental stages, tissues and various unfavorable conditions such as salinity, drought, and hormonal treatment. Analyses indicated that the expression of SUN1/2 transcripts are ubiquitous; that of SUN3/4 are development/tissue regulated, and SUN5 are inflorescence stage-specific. This study provides an initial framework for the characterization and functional validation of the plant SUN family.
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Affiliation(s)
- Md Nur Ahad Shah
- Department of Biochemistry and Molecular Biology, Shahjalal University of Science and Technology, Sylhet, 3114, Bangladesh
| | - Shatil Arabia
- Plant Breeding and Biotechnology Laboratory, Department of Botany, University of Dhaka, Dhaka, 1000, Bangladesh
| | - Tahmina Islam
- Plant Breeding and Biotechnology Laboratory, Department of Botany, University of Dhaka, Dhaka, 1000, Bangladesh.
| | - Ajit Ghosh
- Department of Biochemistry and Molecular Biology, Shahjalal University of Science and Technology, Sylhet, 3114, Bangladesh.
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17
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Detection of SUN1 Splicing Variants at the mRNA and Protein Levels in Cancer. Methods Mol Biol 2018. [PMID: 30141053 DOI: 10.1007/978-1-4939-8691-0_21] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register]
Abstract
The linker of nucleoskeleton and cytoskeleton (LINC) complex, containing the proteins SUN and nesprin, is the fundamental structural unit of the nuclear envelope. The neoplastic-based regulation of the LINC complex in cancer tissues has become increasingly recognized in recent years, including the altered expression, somatic mutation, and methylation of genes. However, precisely how mutations and deregulated expression of the LINC complex contribute to the pathogenic mechanisms of tumorigenesis remain to be elucidated, mainly because of several technical difficulties. First, both the SUN and SYNE (encoding nesprin) genes give rise to a vast number of splicing variants. Second, immunoprecipitation experiments of endogenous SUN and nesprin proteins are difficult owing to the lack of suitable reagents as well as the limited solubility of these proteins in mild extraction conditions. Here, we describe three protocols to investigate these aspects: (1) immunohistochemistry to determine the expression levels and localization of the LINC complex in cancer tissue, (2) detection of SUN1 splicing variants at the mRNA level, and (3) detection of SUN1 splicing variants and binding partners at the protein level.
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18
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Sha YW, Xu X, Ji ZY, Lin SB, Wang X, Qiu PP, Zhou Y, Mei LB, Su ZY, Li L, Li P. Genetic contribution of SUN5 mutations to acephalic spermatozoa in Fujian China. Gene 2018; 647:221-225. [PMID: 29331481 DOI: 10.1016/j.gene.2018.01.035] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2017] [Revised: 01/03/2018] [Accepted: 01/09/2018] [Indexed: 12/30/2022]
Abstract
Acephalic spermatozoa is an extremely rare disease associated with primary infertility. A recent study showed that genetic alterations in the SUN5 gene lead to this disease, and SUN5 mutations could explain the disease in about half of the patients. Therefore, in the present study, to re-visit the genetic contribution of SUN5 mutations to acephalic spermatozoa, we recruited 15 unrelated affected individuals and screened the SUN5 gene for mutations by whole-exome sequencing (WES) and Sanger sequencing. Five of the 15 (33.33%) subjects were found to carry the same homozygous mutation in the SUN5 gene c.381delA (p.V128Sfs*7). Neither homozygous nor compound heterozygous mutations in SUN5 were found in the other 10 patients. The c.381delA mutation resulted in the truncation of the SUN5 protein and decreased the expression and altered the distribution of the outer dense fiber 1 (ODF1) protein. Thus, in our study SUN5 mutations accounted for only one-third of the patients in our cohort, which is lower than the percentage reported previously. Thus, our study suggests that the contribution of SUN5 mutations to acephalic spermatozoa might not be as high as described previously. These results will help in the genetic counseling of patients with acephalic spermatozoa.
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Affiliation(s)
- Yan-Wei Sha
- Department of Reproductive Medicine, Xiamen Maternity and Child Care Hospital, Xiamen, Fujian 361005, China
| | - Xiaohui Xu
- School of Pharmaceutical Sciences, Xiamen University, Xiamen, Fujian 361005, China
| | - Zhi-Yong Ji
- Department of Reproductive Medicine, Xiamen Maternity and Child Care Hospital, Xiamen, Fujian 361005, China
| | - Shao-Bin Lin
- Department of Reproductive Medicine, Xiamen Maternity and Child Care Hospital, Xiamen, Fujian 361005, China
| | - Xu Wang
- Department of Reproductive Medicine, Xiamen Maternity and Child Care Hospital, Xiamen, Fujian 361005, China
| | - Ping-Ping Qiu
- Department of Reproductive Medicine, Xiamen Maternity and Child Care Hospital, Xiamen, Fujian 361005, China
| | - Yulin Zhou
- Department of Reproductive Medicine, Xiamen Maternity and Child Care Hospital, Xiamen, Fujian 361005, China
| | - Li-Bin Mei
- Department of Reproductive Medicine, Xiamen Maternity and Child Care Hospital, Xiamen, Fujian 361005, China
| | - Zhi-Ying Su
- Department of Reproductive Medicine, Xiamen Maternity and Child Care Hospital, Xiamen, Fujian 361005, China
| | - Lin Li
- Central Laboratory, Beijing Obstetrics and Gynecology Hospital, Capital Medical University, Chaoyang, Beijing 100026, China.
| | - Ping Li
- Department of Reproductive Medicine, Xiamen Maternity and Child Care Hospital, Xiamen, Fujian 361005, China.
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19
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Zhao Z, Liu Y. Molecular Cloning of Porcine SUN5 Gene and Association between a SNP with Litter Size Trait. Anim Biotechnol 2017; 28:301-305. [PMID: 28358284 DOI: 10.1080/10495398.2017.1293545] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
SUN domain-containing protein 5 (SUN5) is an important reproduction related gene. In this study, we cloned the full-length coding sequence of porcine SUN5 gene through RT-PCR. Sequence analysis of this gene revealed that the pig SUN5 gene encodes a protein of 383 amino acids that has high homology with the SUN5 protein of eight species: wild Bactrian camel (95%), alpaca (95%), Yangtze River dolphin (94%), sperm whale (94%), sheep (93%), black flying fox (93%), goat (92%), and horse (91%). This gene is structured into 13 exons and 12 introns as revealed by computer-assisted analysis. The prediction of transmembrane helices showed that pig SUN5 protein might be a transmembrane protein. PCR-Taq I-RFLP was established to detect the GU475008:c.138 G>A substitution of porcine SUN5 gene coding sequence and eight pig breeds displayed obvious genotype and allele frequency differences at this mutation locus. Association of this SNP with litter size traits was assessed in Large White (n = 200) and Landrace (n = 200) pig populations, and the results demonstrated that this polymorphic locus was significantly associated with the litter size of all parities in Large White and Landrace sows (P < 0.05). Therefore, the SUN5 gene could be a useful candidate gene for increasing the litter size in pigs.
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Affiliation(s)
- Zhenhua Zhao
- a Yunnan Key Laboratory of Fertility Regulation and Minority , Birth Health , Kunming , China.,b National Health and Family Planning Key Laboratory of Preconception Health in Western China , Kunming , China.,c Key Laboratory of Animal Nutrition and Feed of Yunnan Province , Yunnan Agricultural University , Kunming , China
| | - Yonggang Liu
- c Key Laboratory of Animal Nutrition and Feed of Yunnan Province , Yunnan Agricultural University , Kunming , China
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20
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Shang Y, Zhu F, Wang L, Ouyang YC, Dong MZ, Liu C, Zhao H, Cui X, Ma D, Zhang Z, Yang X, Guo Y, Liu F, Yuan L, Gao F, Guo X, Sun QY, Cao Y, Li W. Essential role for SUN5 in anchoring sperm head to the tail. eLife 2017; 6:28199. [PMID: 28945193 PMCID: PMC5634783 DOI: 10.7554/elife.28199] [Citation(s) in RCA: 69] [Impact Index Per Article: 9.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2017] [Accepted: 09/25/2017] [Indexed: 01/09/2023] Open
Abstract
SUN (Sad1 and UNC84 domain containing)-domain proteins are reported to reside on the nuclear membrane playing distinct roles in nuclear dynamics. SUN5 is a new member of the SUN family, with little knowledge regarding its function. Here, we generated Sun5−/− mice and found that male mice were infertile. Most Sun5-null spermatozoa displayed a globozoospermia-like phenotype but they were actually acephalic spermatozoa. Additional studies revealed that SUN5 was located in the neck of the spermatozoa, anchoring sperm head to the tail, and without functional SUN5 the sperm head to tail coupling apparatus was detached from nucleus during spermatid elongation. Finally, we found that healthy heterozygous offspring could be obtained via intracytoplasmic injection of Sun5-mutated sperm heads for both male mice and patients. Our studies reveal the essential role of SUN5 in anchoring sperm head to the tail and provide a promising way to treat this kind of acephalic spermatozoa-associated male infertility.
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Affiliation(s)
- Yongliang Shang
- 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
| | - Fuxi Zhu
- Reproductive Medicine Center, Department of Obstetrics and Gynecology, The First Affiliated Hospital of Anhui Medical University, Hefei, China.,Institute of Reproductive Genetics, Anhui Medical University, Hefei, China
| | - Lina Wang
- 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
| | - Ying-Chun Ouyang
- State Key Laboratory of Stem Cell and Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing, China
| | - Ming-Zhe Dong
- State Key Laboratory of Stem Cell and Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing, China
| | - Chao Liu
- State Key Laboratory of Stem Cell and Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing, China
| | - Haichao Zhao
- 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
| | - Xiuhong Cui
- State Key Laboratory of Stem Cell and Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing, China
| | - Dongyuan Ma
- State Key Laboratory of Membrane Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing, China
| | - Zhiguo Zhang
- Reproductive Medicine Center, Department of Obstetrics and Gynecology, The First Affiliated Hospital of Anhui Medical University, Hefei, China.,Institute of Reproductive Genetics, Anhui Medical University, Hefei, China
| | - Xiaoyu Yang
- Center of Clinical Reproductive Medicine, First Affiliated Hospital, Nanjing Medical University, Nanjing, China
| | - Yueshuai Guo
- State Key Laboratory of Reproductive Medicine, Collaborative Innovation Center of Genetics and Development, Department of Histology and Embryology, Nanjing Medical University, Nanjing, China
| | - Feng Liu
- University of Chinese Academy of Sciences, Beijing, China.,State Key Laboratory of Membrane Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing, China
| | - Li Yuan
- Savaid School of Medicine, University of Chinese Academy of Sciences, Beijing, China
| | - Fei Gao
- 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
| | - Xuejiang Guo
- State Key Laboratory of Reproductive Medicine, Collaborative Innovation Center of Genetics and Development, Department of Histology and Embryology, Nanjing Medical University, Nanjing, China
| | - Qing-Yuan Sun
- 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
| | - Yunxia Cao
- Reproductive Medicine Center, Department of Obstetrics and Gynecology, The First Affiliated Hospital of Anhui Medical University, Hefei, China.,Institute of Reproductive Genetics, Anhui Medical University, Hefei, 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
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21
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Nishioka Y, Imaizumi H, Imada J, Katahira J, Matsuura N, Hieda M. SUN1 splice variants, SUN1_888, SUN1_785, and predominant SUN1_916, variably function in directional cell migration. Nucleus 2017; 7:572-584. [PMID: 27858498 DOI: 10.1080/19491034.2016.1260802] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022] Open
Abstract
The LINC complex is a multifunctional protein complex that is involved in various processes at the nuclear envelope, such as nuclear migration, mechanotransduction and chromatin tethering in the meiotic phase. However, it remains unknown how these functions are regulated in different cell contexts. An inner nuclear membrane component of the LINC complex, SUN1, is ubiquitously expressed. The human SUN1 gene produces over 10 variants by alternative splicing. Although functions of SUN1 are relatively well characterized, functional differences among SUN1 splice variants are poorly characterized. LINC complex components are associated with a wide range of human diseases; therefore, it is important to understand the functional diversity among SUN1 splice variants. Here, we identified a novel human SUN1 splice variant, SUN1_888. overexpression of the SUN1 splice variants, SUN1_888 or SUN1_785, but not the predominant isoform, SUN1_916, activated directional cell migration. Knockdown of SUN1_888 suppressed cell migration; in contrast depletion of SUN1_916 activated cell migration. In addition, all of investigated SUN1 splicing variants rescued cell migration in SUN1 knock out cell. These results indicate that redundant and non-redundant functions of SUN1 splice variant in directional cell migration and suggest that variable LINC complexes with distinct task may exit. Furthermore, in contrast to previous studies, we showed association between SUN1 and B-type lamins. Interestingly, B-type lamin preferentially interacts with SUN1 but not SUN2. These results suggest that tissue-specific SUN1 variants variably interact with nucleoplasmic partners and allow variable assembly of LINC complexes that can be assigned to distinct tasks.
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Affiliation(s)
- Yu Nishioka
- a Osaka University, Graduate School of Medicine and Health Science , Suita City , Osaka , Japan
| | - Hiromasa Imaizumi
- a Osaka University, Graduate School of Medicine and Health Science , Suita City , Osaka , Japan
| | - Junko Imada
- a Osaka University, Graduate School of Medicine and Health Science , Suita City , Osaka , Japan
| | - Jun Katahira
- b Osaka University, Graduate School of Frontier Bioscience , Suita City , Osaka , Japan
| | - Nariaki Matsuura
- a Osaka University, Graduate School of Medicine and Health Science , Suita City , Osaka , Japan
| | - Miki Hieda
- a Osaka University, Graduate School of Medicine and Health Science , Suita City , Osaka , Japan.,c Ehime Prefectural University of Health Science s, Tobe-cho , Ehime , Japan
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22
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Hieda M. Implications for Diverse Functions of the LINC Complexes Based on the Structure. Cells 2017; 6:cells6010003. [PMID: 28134781 PMCID: PMC5371868 DOI: 10.3390/cells6010003] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2016] [Revised: 01/15/2017] [Accepted: 01/17/2017] [Indexed: 12/18/2022] Open
Abstract
The linker of nucleoskeleton and cytoskeleton (LINC) complex is composed of the outer and inner nuclear membrane protein families Klarsicht, Anc-1, and Syne homology (KASH), and Sad1 and UNC-84 (SUN) homology domain proteins. Increasing evidence has pointed to diverse functions of the LINC complex, such as in nuclear migration, nuclear integrity, chromosome movement and pairing during meiosis, and mechanotransduction to the genome. In metazoan cells, the nuclear envelope possesses the nuclear lamina, which is a thin meshwork of intermediate filaments known as A-type and B-type lamins and lamin binding proteins. Both of lamins physically interact with the inner nuclear membrane spanning SUN proteins. The nuclear lamina has also been implicated in various functions, including maintenance of nuclear integrity, mechanotransduction, cellular signalling, and heterochromatin dynamics. Thus, it is clear that the LINC complex and nuclear lamins perform diverse but related functions. However, it is unknown whether the LINC complex-lamins interactions are involved in these diverse functions, and their regulation mechanism has thus far been elusive. Recent structural analysis suggested a dynamic nature of the LINC complex component, thus providing an explanation for LINC complex organization. This review, elaborating on the integration of crystallographic and biochemical data, helps to integrate this research to gain a better understanding of the diverse functions of the LINC complex.
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Affiliation(s)
- Miki Hieda
- Department of Medical Technology, Ehime Prefectural University of Health Sciences, Ehime 791-2101, Japan.
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23
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Zhu F, Wang F, Yang X, Zhang J, Wu H, Zhang Z, Zhang Z, He X, Zhou P, Wei Z, Gecz J, Cao Y. Biallelic SUN5 Mutations Cause Autosomal-Recessive Acephalic Spermatozoa Syndrome. Am J Hum Genet 2016; 99:942-949. [PMID: 27640305 DOI: 10.1016/j.ajhg.2016.08.004] [Citation(s) in RCA: 80] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2016] [Accepted: 08/05/2016] [Indexed: 01/06/2023] Open
Abstract
Acephalic spermatozoa syndrome is a rare and severe form of teratozoospermia characterized by a predominance of headless spermatozoa in the ejaculate. Family clustering and consanguinity suggest a genetic origin; however, causative mutations have yet to be identified. We performed whole-exome sequencing in two unrelated infertile men and subsequent variant filtering identified one homozygous (c.824C>T [p.Thr275Met]) and one compound heterozygous (c.1006C>T [p.Arg356Cys] and c.485T>A [p.Met162Lys]) SUN5 (also named TSARG4) variants. Sanger sequencing of SUN5 in 15 additional unrelated infertile men revealed four compound heterozygous (c.381delA [p.Val128Serfs∗7] and c.824C>T [p.Thr275Met]; c.381delA [p.Val128Serfs∗7] and c.781G>A [p.Val261Met]; c.216G>A [p.Trp72∗] and c.1043A>T [p.Asn348Ile]; c.425+1G>A/c.1043A>T [p.Asn348Ile]) and two homozygous (c.851C>G [p.Ser284∗]; c.350G>A [p.Gly114Arg]) variants in six individuals. These 10 SUN5 variants were found in 8 of 17 unrelated men, explaining the genetic defect in 47.06% of the affected individuals in our cohort. These variants were absent in 100 fertile population-matched control individuals. SUN5 variants lead to absent, significantly reduced, or truncated SUN5, and certain variants altered SUN5 distribution in the head-tail junction of the sperm. In summary, these results demonstrate that biallelic SUN5 mutations cause male infertility due to autosomal-recessive acephalic spermatozoa syndrome.
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Affiliation(s)
- Fuxi Zhu
- Reproductive Medicine Center, Department of Obstetrics and Gynecology, The First Affiliated Hospital of Anhui Medical University, Hefei 230022, China; Institute of Reproductive Genetics, Anhui Medical University, Hefei 230022, China; School of Life Science, Anhui Medical University, Hefei 230022, China.
| | - Fengsong Wang
- School of Life Science, Anhui Medical University, Hefei 230022, China
| | - Xiaoyu Yang
- Center of Clinical Reproductive Medicine, First Affiliated Hospital, Nanjing Medical University, Nanjing 210029, China
| | - Jingjing Zhang
- Reproductive Medicine Center, Department of Obstetrics and Gynecology, The First Affiliated Hospital of Anhui Medical University, Hefei 230022, China; Institute of Reproductive Genetics, Anhui Medical University, Hefei 230022, China
| | - Huan Wu
- Reproductive Medicine Center, Department of Obstetrics and Gynecology, The First Affiliated Hospital of Anhui Medical University, Hefei 230022, China; Institute of Reproductive Genetics, Anhui Medical University, Hefei 230022, China
| | - Zhou Zhang
- Reproductive Medicine Center, Department of Obstetrics and Gynecology, The First Affiliated Hospital of Anhui Medical University, Hefei 230022, China; Institute of Reproductive Genetics, Anhui Medical University, Hefei 230022, China
| | - Zhiguo Zhang
- Reproductive Medicine Center, Department of Obstetrics and Gynecology, The First Affiliated Hospital of Anhui Medical University, Hefei 230022, China; Institute of Reproductive Genetics, Anhui Medical University, Hefei 230022, China; Anhui Provincial Engineering Technology Research Center for Biopreservation and Artificial Organs, Hefei 230022, China
| | - Xiaojin He
- Reproductive Medicine Center, Department of Obstetrics and Gynecology, The First Affiliated Hospital of Anhui Medical University, Hefei 230022, China; Institute of Reproductive Genetics, Anhui Medical University, Hefei 230022, China; Anhui Provincial Engineering Technology Research Center for Biopreservation and Artificial Organs, Hefei 230022, China
| | - Ping Zhou
- Reproductive Medicine Center, Department of Obstetrics and Gynecology, The First Affiliated Hospital of Anhui Medical University, Hefei 230022, China; Institute of Reproductive Genetics, Anhui Medical University, Hefei 230022, China; Anhui Provincial Engineering Technology Research Center for Biopreservation and Artificial Organs, Hefei 230022, China
| | - Zhaolian Wei
- Reproductive Medicine Center, Department of Obstetrics and Gynecology, The First Affiliated Hospital of Anhui Medical University, Hefei 230022, China; Institute of Reproductive Genetics, Anhui Medical University, Hefei 230022, China; Anhui Provincial Engineering Technology Research Center for Biopreservation and Artificial Organs, Hefei 230022, China
| | - Jozef Gecz
- School of Medicine, Robinson Research Institute, The University of Adelaide, and South Australian Health and Medical Research Institute, Adelaide, South Australia 5006, Australia
| | - Yunxia Cao
- Reproductive Medicine Center, Department of Obstetrics and Gynecology, The First Affiliated Hospital of Anhui Medical University, Hefei 230022, China; Institute of Reproductive Genetics, Anhui Medical University, Hefei 230022, China; Anhui Provincial Engineering Technology Research Center for Biopreservation and Artificial Organs, Hefei 230022, China.
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24
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Under Pressure: Mechanical Stress Management in the Nucleus. Cells 2016; 5:cells5020027. [PMID: 27314389 PMCID: PMC4931676 DOI: 10.3390/cells5020027] [Citation(s) in RCA: 43] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2016] [Revised: 06/03/2016] [Accepted: 06/06/2016] [Indexed: 12/23/2022] Open
Abstract
Cells are constantly adjusting to the mechanical properties of their surroundings, operating a complex mechanochemical feedback, which hinges on mechanotransduction mechanisms. Whereas adhesion structures have been shown to play a central role in mechanotransduction, it now emerges that the nucleus may act as a mechanosensitive structure. Here, we review recent advances demonstrating that mechanical stress emanating from the cytoskeleton can activate pathways in the nucleus which eventually impact both its structure and the transcriptional machinery.
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25
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SUN4 is essential for nuclear remodeling during mammalian spermiogenesis. Dev Biol 2015; 407:321-30. [DOI: 10.1016/j.ydbio.2015.09.010] [Citation(s) in RCA: 49] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2015] [Revised: 08/27/2015] [Accepted: 09/23/2015] [Indexed: 11/17/2022]
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26
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Yassine S, Escoffier J, Nahed RA, Pierre V, Karaouzene T, Ray PF, Arnoult C. Dynamics of Sun5 localization during spermatogenesis in wild type and Dpy19l2 knock-out mice indicates that Sun5 is not involved in acrosome attachment to the nuclear envelope. PLoS One 2015; 10:e0118698. [PMID: 25775128 PMCID: PMC4361733 DOI: 10.1371/journal.pone.0118698] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2014] [Accepted: 01/22/2015] [Indexed: 11/19/2022] Open
Abstract
The acrosome is an organelle that is central to sperm physiology and a defective acrosome biogenesis leads to globozoospermia, a severe male infertility. The identification of the actors involved in acrosome biogenesis is therefore particularly important to decipher the molecular pathogeny of globozoospermia. We recently showed that a defect in the DPY19L2 gene is present in more than 70% of globozoospermic men and demonstrated that Dpy19l2, located in the inner nuclear membrane, is the first protein involved in the attachment of the acrosome to the nuclear envelope (NE). SUN proteins serve to link the nuclear envelope to the cytoskeleton and are therefore good candidates to participate in acrosome-nucleus attachment, potentially by interacting with DPY19L2. In order to characterize new actors of acrosomal attachment, we focused on Sun5 (also called Spag4l), which is highly expressed in male germ cells, and investigated its localization during spermatogenesis. Using immunohistochemistry and Western blot experiments in mice, we showed that Sun5 transits through different cellular compartments during meiosis. In pachytene spermatocytes, it is located in a membranous compartment different to the reticulum. In round spermatids, it progresses to the Golgi and the NE before to be located to the tail/head junction in epididymal sperm. Interestingly, we demonstrate that Sun5 is not, as initially reported, facing the acrosome but is in fact excluded from this zone. Moreover, we show that in Dpy19l2 KO spermatids, upon the detachment of the acrosome, Sun5 relocalizes to the totality of the NE suggesting that the acrosome attachment excludes Sun5 from the NE facing the acrosome. Finally, Western-blot experiments demonstrate that Sun5 is glycosylated. Overall, our work, associated with other publications, strongly suggests that the attachment of the acrosome to the nucleus does not likely depend on the formation of SUN complexes.
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Affiliation(s)
- Sandra Yassine
- Université Grenoble Alpes, Grenoble, F-38000, France
- Equipe "Génétique, Epigénétique et thérapies de l’Infertilité" Institut Albert Bonniot, INSERM U823, Grenoble, F-38000, France
| | - Jessica Escoffier
- Université Grenoble Alpes, Grenoble, F-38000, France
- Equipe "Génétique, Epigénétique et thérapies de l’Infertilité" Institut Albert Bonniot, INSERM U823, Grenoble, F-38000, France
| | - Roland Abi Nahed
- Université Grenoble Alpes, Grenoble, F-38000, France
- Equipe "Génétique, Epigénétique et thérapies de l’Infertilité" Institut Albert Bonniot, INSERM U823, Grenoble, F-38000, France
| | - Virginie Pierre
- Université Grenoble Alpes, Grenoble, F-38000, France
- Equipe "Génétique, Epigénétique et thérapies de l’Infertilité" Institut Albert Bonniot, INSERM U823, Grenoble, F-38000, France
| | - Thomas Karaouzene
- Université Grenoble Alpes, Grenoble, F-38000, France
- Equipe "Génétique, Epigénétique et thérapies de l’Infertilité" Institut Albert Bonniot, INSERM U823, Grenoble, F-38000, France
- CHU de Grenoble, UF de Biochimie et Génétique Moléculaire, Grenoble, F-38000, France
| | - Pierre F. Ray
- Université Grenoble Alpes, Grenoble, F-38000, France
- Equipe "Génétique, Epigénétique et thérapies de l’Infertilité" Institut Albert Bonniot, INSERM U823, Grenoble, F-38000, France
- CHU de Grenoble, UF de Biochimie et Génétique Moléculaire, Grenoble, F-38000, France
| | - Christophe Arnoult
- Université Grenoble Alpes, Grenoble, F-38000, France
- Equipe "Génétique, Epigénétique et thérapies de l’Infertilité" Institut Albert Bonniot, INSERM U823, Grenoble, F-38000, France
- * E-mail:
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27
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Osorio DS, Gomes ER. The contemporary nucleus: A trip down memory lane. Biol Cell 2013; 105:430-41. [DOI: 10.1111/boc.201300009] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2013] [Accepted: 06/21/2013] [Indexed: 01/12/2023]
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28
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Lee CY, Conrad MN, Dresser ME. Meiotic chromosome pairing is promoted by telomere-led chromosome movements independent of bouquet formation. PLoS Genet 2012; 8:e1002730. [PMID: 22654677 PMCID: PMC3359977 DOI: 10.1371/journal.pgen.1002730] [Citation(s) in RCA: 70] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2010] [Accepted: 04/11/2012] [Indexed: 11/19/2022] Open
Abstract
Chromosome pairing in meiotic prophase is a prerequisite for the high fidelity of chromosome segregation that haploidizes the genome prior to gamete formation. In the budding yeast Saccharomyces cerevisiae, as in most multicellular eukaryotes, homologous pairing at the cytological level reflects the contemporaneous search for homology at the molecular level, where DNA double-strand broken ends find and interact with templates for repair on homologous chromosomes. Synapsis (synaptonemal complex formation) stabilizes pairing and supports DNA repair. The bouquet stage, where telomeres have formed a transient single cluster early in meiotic prophase, and telomere-promoted rapid meiotic prophase chromosome movements (RPMs) are prominent temporal correlates of pairing and synapsis. The bouquet has long been thought to contribute to the kinetics of pairing, but the individual roles of bouquet and RPMs are difficult to assess because of common dependencies. For example, in budding yeast RPMs and bouquet both require the broadly conserved SUN protein Mps3 as well as Ndj1 and Csm4, which link telomeres to the cytoskeleton through the intact nuclear envelope. We find that mutants in these genes provide a graded series of RPM activity: wild-type>mps3-dCC>mps3-dAR>ndj1Δ>mps3-dNT = csm4Δ. Pairing rates are directly correlated with RPM activity even though only wild-type forms a bouquet, suggesting that RPMs promote homologous pairing directly while the bouquet plays at most a minor role in Saccharomyces cerevisiae. A new collision trap assay demonstrates that RPMs generate homologous and heterologous chromosome collisions in or before the earliest stages of prophase, suggesting that RPMs contribute to pairing by stirring the nuclear contents to aid the recombination-mediated homology search.
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Affiliation(s)
- Chih-Ying Lee
- Program in Cell Cycle and Cancer Biology, Oklahoma Medical Research Foundation, Oklahoma City, Oklahoma, United States of America
| | - Michael N. Conrad
- Program in Cell Cycle and Cancer Biology, Oklahoma Medical Research Foundation, Oklahoma City, Oklahoma, United States of America
| | - Michael E. Dresser
- Program in Cell Cycle and Cancer Biology, Oklahoma Medical Research Foundation, Oklahoma City, Oklahoma, United States of America
- Department of Cell Biology, University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma, United States of America
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