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Guseva EA, Buev VS, Mirzaeva SE, Pletnev PI, Dontsova OA, Sergiev PV. Structure and Composition of Spermatozoa Fibrous Sheath in Diverse Groups of Metazoa. Int J Mol Sci 2024; 25:7663. [PMID: 39062905 PMCID: PMC11276731 DOI: 10.3390/ijms25147663] [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: 05/29/2024] [Revised: 07/01/2024] [Accepted: 07/08/2024] [Indexed: 07/28/2024] Open
Abstract
The proper functioning and assembly of the sperm flagella structures contribute significantly to spermatozoa motility and overall male fertility. However, the fine mechanisms of assembly steps are poorly studied due to the high diversity of cell types, low solubility of the corresponding protein structures, and high tissue and cell specificity. One of the open questions for investigation is the attachment of longitudinal columns to the doublets 3 and 8 of axonemal microtubules through the outer dense fibers. A number of mutations affecting the assembly of flagella in model organisms are known. Additionally, evolutionary genomics data and comparative analysis of flagella morphology are available for a set of non-model species. This review is devoted to the analysis of diverse ultrastructures of sperm flagellum of Metazoa combined with an overview of the evolutionary distribution and function of the mammalian fibrous sheath proteins.
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Affiliation(s)
- Ekaterina A. Guseva
- Center of Life Sciences, Skolkovo Institute of Science and Technology, 143025 Skolkovo, Russia; (E.A.G.); (O.A.D.)
- Belozersky Institute of Physico-Chemical Biology, Lomonosov Moscow State University, 119991 Moscow, Russia
- Faculty of Chemistry, Lomonosov Moscow State University, 119991 Moscow, Russia; (V.S.B.); (S.E.M.); (P.I.P.)
| | - Vitaly S. Buev
- Faculty of Chemistry, Lomonosov Moscow State University, 119991 Moscow, Russia; (V.S.B.); (S.E.M.); (P.I.P.)
- Faculty of Bioengeneering and Bioinformatics, Lomonosov Moscow State University, 119991 Moscow, Russia
| | - Sabina E. Mirzaeva
- Faculty of Chemistry, Lomonosov Moscow State University, 119991 Moscow, Russia; (V.S.B.); (S.E.M.); (P.I.P.)
| | - Philipp I. Pletnev
- Faculty of Chemistry, Lomonosov Moscow State University, 119991 Moscow, Russia; (V.S.B.); (S.E.M.); (P.I.P.)
| | - Olga A. Dontsova
- Center of Life Sciences, Skolkovo Institute of Science and Technology, 143025 Skolkovo, Russia; (E.A.G.); (O.A.D.)
- Belozersky Institute of Physico-Chemical Biology, Lomonosov Moscow State University, 119991 Moscow, Russia
- Faculty of Chemistry, Lomonosov Moscow State University, 119991 Moscow, Russia; (V.S.B.); (S.E.M.); (P.I.P.)
- Shemyakin–Ovchinnikov Institute of Bioorganic Chemistry, 117997 Moscow, Russia
| | - Petr V. Sergiev
- Center of Life Sciences, Skolkovo Institute of Science and Technology, 143025 Skolkovo, Russia; (E.A.G.); (O.A.D.)
- Belozersky Institute of Physico-Chemical Biology, Lomonosov Moscow State University, 119991 Moscow, Russia
- Faculty of Chemistry, Lomonosov Moscow State University, 119991 Moscow, Russia; (V.S.B.); (S.E.M.); (P.I.P.)
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2
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Zhang K, Xu XH, Wu J, Wang N, Li G, Hao GM, Cao JF. Decreased AKAP4/PKA signaling pathway in high DFI sperm affects sperm capacitation. Asian J Androl 2024; 26:25-33. [PMID: 37695244 PMCID: PMC10846834 DOI: 10.4103/aja202329] [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: 03/12/2023] [Accepted: 06/12/2023] [Indexed: 09/12/2023] Open
Abstract
The sperm DNA fragmentation index (DFI) is a metric used to assess DNA fragmentation within sperm. During in vitro fertilization-embryo transfer (IVF-ET), high sperm DFI can lead to a low fertilization rate, poor embryo development, early miscarriage, etc. A kinase anchoring protein (AKAP) is a scaffold protein that can bind protein kinase A (PKA) to subcellular sites of specific substrates and protects the biophosphorylation reaction. Sperm protein antigen 17 (SPA17) can also bind to AKAP. This study intends to explore the reason for the decreased fertilization rate observed in high sperm DFI (H-DFI) patients during IVF-ET. In addition, the study investigates the expression of AKAP, protein kinase A regulatory subunit (PKARII), and SPA17 between H-DFI and low sperm DFI (L-DFI) patients. SPA17 at the transcriptional level is abnormal, the translational level increases in H-DFI patients, and the expression of AKAP4/PKARII protein decreases. H 2 O 2 has been used to simulate oxidative stress damage to spermatozoa during the formation of sperm DFI. It indicates that H 2 O 2 increases the expression of sperm SPA17 protein and suppresses AKAP4/PKARII protein expression. These processes inhibit sperm capacitation and reduce acrosomal reactions. Embryo culture data and IVF outcomes have been documented. The H-DFI group has a lower fertilization rate. Therefore, the results indicate that the possible causes for the decreased fertilization rate in the H-DFI patients have included loss of sperm AKAP4/PKARII proteins, blocked sperm capacitation, and reduced occurrence of acrosome reaction.
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Affiliation(s)
- Kun Zhang
- Hebei Key Laboratory of Infertility and Genetics, Department of Reproductive Medicine, Second Hospital of Hebei Medical University, Shijiazhuang 050000, China
- Department of Reproductive Medicine, Affiliated Hospital of Xuzhou Medical University, Xuzhou 221000, China
| | - Xiu-Hua Xu
- Hebei Key Laboratory of Infertility and Genetics, Department of Reproductive Medicine, Second Hospital of Hebei Medical University, Shijiazhuang 050000, China
| | - Jian Wu
- Hebei Key Laboratory of Infertility and Genetics, Department of Reproductive Medicine, Second Hospital of Hebei Medical University, Shijiazhuang 050000, China
| | - Ning Wang
- Hebei Key Laboratory of Infertility and Genetics, Department of Reproductive Medicine, Second Hospital of Hebei Medical University, Shijiazhuang 050000, China
| | - Gang Li
- Department of Neurology, The 980 Hospital of the People’s Liberation Army Joint Logistics Support Force (Bethune International Peace Hospital), Shijiazhuang 050000, China
| | - Gui-Min Hao
- Hebei Key Laboratory of Infertility and Genetics, Department of Reproductive Medicine, Second Hospital of Hebei Medical University, Shijiazhuang 050000, China
| | - Jin-Feng Cao
- Hebei Key Laboratory of Infertility and Genetics, Department of Reproductive Medicine, Second Hospital of Hebei Medical University, Shijiazhuang 050000, China
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Howard SA, Benhabbour SR. Non-Hormonal Contraception. J Clin Med 2023; 12:4791. [PMID: 37510905 PMCID: PMC10381146 DOI: 10.3390/jcm12144791] [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: 06/27/2023] [Revised: 07/14/2023] [Accepted: 07/18/2023] [Indexed: 07/30/2023] Open
Abstract
While hormonal contraceptives are efficacious and available in several forms for women, perception of safety and concern over side effects are a deterrent for many. Existing non-hormonal contraceptives include permanent sterilization, copper intrauterine devices (IUDs), chemical/physical barriers such as spermicides and condoms, as well as traditional family planning methods including withdrawal and the rhythm method. Individuals who wish to retain their fertility in the future can achieve highest adherence and efficacy with long-acting, reversible contraceptives (LARCs), though there is only one, the copper IUD, that is non-hormonal. As rates of unintended pregnancies remain high with existing contraceptive options, it is becoming increasingly attractive to develop novel pregnancy prevention methods for both women and men. Non-hormonal contraceptives can target a variety of critical reproductive processes discussed here. This review focuses on identified non-hormonal contraceptive targets and subsequent drug candidates in development.
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Affiliation(s)
- Sarah Anne Howard
- Division of Pharmacoengineering and Molecular Pharmaceutics, UNC Eshelman School of Pharmacy, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA
| | - Soumya Rahima Benhabbour
- Division of Pharmacoengineering and Molecular Pharmaceutics, UNC Eshelman School of Pharmacy, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA
- Joint Department of Biomedical Engineering, North Carolina State University and The University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA
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4
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Zhang R, Liang C, Guo X, Bao P, Pei J, Wu F, Yin M, Chu M, Yan P. Quantitative phosphoproteomics analyses reveal the regulatory mechanisms related to frozen-thawed sperm capacitation and acrosome reaction in yak (Bos grunniens). Front Physiol 2022; 13:1013082. [PMID: 36277216 PMCID: PMC9583833 DOI: 10.3389/fphys.2022.1013082] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2022] [Accepted: 09/20/2022] [Indexed: 11/13/2022] Open
Abstract
Mammalian spermatozoa are not mature after ejaculation and must undergo additional functional and structural changes within female reproductive tracts to achieve subsequent fertilization, including both capacitation and acrosome reaction (AR), which are dominated by post-translational modifications (PTMs), especially phosphorylation. However, the mechanism of protein phosphorylation during frozen-thawed sperm capacitation and AR has not been well studied. In this study, the phosphoproteomics approach was employed based on tandem mass tag (TMT) labeling combined with liquid chromatography-tandem mass spectrometry (LC-MS/MS) strategy to analyze frozen-thawed sperm in Ashidan yak under three sequential conditions (density gradient centrifugation-based purification, incubation in the capacitation medium and induction of AR processes by the calcium ionophore A23187 treatment). The identification of 1,377 proteins with 5,509 phosphorylation sites revealed changes in phosphorylation levels of sperm-specific proteins involved in regulation of spermatogenesis, sperm motility, energy metabolism, cilium movement, capacitation and AR. Some phosphorylated proteins, such as AKAP3, AKAP4, SPA17, PDMD11, CABYR, PRKAR1A, and PRKAR2A were found to regulate yak sperm capacitation and AR though the cAMP/PKA signaling pathway cascades. Notably, the phosphorylation level of SPA17 at Y156 increased in capacitated sperm, suggesting that it is also a novel functional protein besides AKAPs during sperm capacitation. Furthermore, the results of this study suggested that the phosphorylation of PRKAR1A and PRKAR2A, and the dephosphorylation of CABYR both play key regulatory role in yak sperm AR process. Protein-protein interaction analysis revealed that differentially phosphorylated proteins (AKAP3, AKAP4, FSIP2, PSMD11, CABYR, and TPPP2) related to capacitation and AR process played a key role in protein kinase A binding, sperm motility, reproductive process, cytoskeleton and sperm flagella function. Taken together, these data provide not only a solid foundation for further exploring phosphoproteome of sperm in yak, but an efficient way to identify sperm fertility-related marker phosphorylated proteins.
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Affiliation(s)
- Renzheng Zhang
- Key Laboratory of Animal Genetics and Breeding on Tibetan Plateau, Ministry of Agriculture and Rural Affairs, Key Laboratory of Yak Breeding Engineering of Gansu Province, Lanzhou Institute of Husbandry and Pharmaceutical Sciences, Chinese Academy of Agricultural Sciences, Lanzhou, China
- College of Animal Science and Technology, Gansu Agricultural University, Lanzhou, China
| | - Chunnian Liang
- Key Laboratory of Animal Genetics and Breeding on Tibetan Plateau, Ministry of Agriculture and Rural Affairs, Key Laboratory of Yak Breeding Engineering of Gansu Province, Lanzhou Institute of Husbandry and Pharmaceutical Sciences, Chinese Academy of Agricultural Sciences, Lanzhou, China
| | - Xian Guo
- Key Laboratory of Animal Genetics and Breeding on Tibetan Plateau, Ministry of Agriculture and Rural Affairs, Key Laboratory of Yak Breeding Engineering of Gansu Province, Lanzhou Institute of Husbandry and Pharmaceutical Sciences, Chinese Academy of Agricultural Sciences, Lanzhou, China
| | - Pengjia Bao
- Key Laboratory of Animal Genetics and Breeding on Tibetan Plateau, Ministry of Agriculture and Rural Affairs, Key Laboratory of Yak Breeding Engineering of Gansu Province, Lanzhou Institute of Husbandry and Pharmaceutical Sciences, Chinese Academy of Agricultural Sciences, Lanzhou, China
| | - Jie Pei
- Key Laboratory of Animal Genetics and Breeding on Tibetan Plateau, Ministry of Agriculture and Rural Affairs, Key Laboratory of Yak Breeding Engineering of Gansu Province, Lanzhou Institute of Husbandry and Pharmaceutical Sciences, Chinese Academy of Agricultural Sciences, Lanzhou, China
| | - Fude Wu
- Yak Breeding and Extension Service Center in in Qinghai Province, Xining, China
| | - Mancai Yin
- Yak Breeding and Extension Service Center in in Qinghai Province, Xining, China
| | - Min Chu
- Key Laboratory of Animal Genetics and Breeding on Tibetan Plateau, Ministry of Agriculture and Rural Affairs, Key Laboratory of Yak Breeding Engineering of Gansu Province, Lanzhou Institute of Husbandry and Pharmaceutical Sciences, Chinese Academy of Agricultural Sciences, Lanzhou, China
- *Correspondence: Min Chu, ; Ping Yan,
| | - Ping Yan
- Key Laboratory of Animal Genetics and Breeding on Tibetan Plateau, Ministry of Agriculture and Rural Affairs, Key Laboratory of Yak Breeding Engineering of Gansu Province, Lanzhou Institute of Husbandry and Pharmaceutical Sciences, Chinese Academy of Agricultural Sciences, Lanzhou, China
- *Correspondence: Min Chu, ; Ping Yan,
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5
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Tu Z, Peng J, Long X, Li J, Wu L, Huang K, Zhu X. Sperm Autoantigenic Protein 17 Predicts the Prognosis and the Immunotherapy Response of Cancers: A Pan-Cancer Analysis. Front Immunol 2022; 13:844736. [PMID: 35592314 PMCID: PMC9110779 DOI: 10.3389/fimmu.2022.844736] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2021] [Accepted: 04/07/2022] [Indexed: 11/13/2022] Open
Abstract
Background Sperm autoantigen protein 17 (SPA17) is a highly conserved mammalian protein that participates in the acrosome reaction during fertilization and is a recently reported member of the cancer-testicular antigen (CTA) family. It has been reported that the SPA17 expression is limited in adult somatic tissues and re-expressed in tumor tissues. Recently, studies have found that SPA17 regulates the progression of various cancers, but its role in cancer immunotherapy is not clear. Methods The pan-cancer and normal tissue transcriptional data were acquired from The Cancer Genome Atlas (TCGA) and the Genotype-Tissue Expression (GTEx) datasets. We explored the SPA17 pan-cancer genomic alteration analysis in the cBioPortal webtool. The Human Protein Atlas (HPA) and ComPPI websites were used to mine the SPA17 protein information. We performed a western blotting assay to validate the upregulated SPA17 expression in clinical glioblastoma (GBM) samples. The univariate Cox regression and Kaplan-Meier method were used to assess the prognostic role of SPA17 in pan-cancer. Gene Set Enrichment Analysis (GSEA) was used to search the associated cancer hallmarks with SPA17 expression in each cancer type. TIMER2.0 was the main platform to investigate the immune cell infiltrations related to SPA17 in pan-cancer. The associations between SPA17 and immunotherapy biomarkers were performed by Spearman correlation analysis. The drug sensitivity information from the Connectivity Map (CMap) dataset was downloaded to perform SAP17-specific inhibitor sensitivity analysis. Findings SPA17 was aberrantly expressed in most cancer types and exhibited prognosis predictive ability in various cancers. In addition, our results also show that SPA17 was significantly correlated with immune-activated hallmarks (including pathways and biological processes), immune cell infiltrations, and immunoregulator expressions. The most exciting finding was that SPA17 could significantly predict anti-PDL1 and anti-PD1 therapy responses in cancer patients. Finally, specific inhibitors, like irinotecan and puromycin, which correlate with SPA17 expression in different cancer types, were also screened using Connectivity Map (CMap). Conclusions Our results reveal that SPA17 was abnormally expressed in cancer tissues, and this expression pattern could be associated with immune cell infiltrations in tumor microenvironments. Clinically, SPA17 not only acted as a potent prognostic factor to predict the clinical outcomes of cancer patients but was also a promising immunotherapy predictive biomarker for cancer patients treated with immune-checkpoint inhibitors (ICIs).
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Affiliation(s)
- Zewei Tu
- Department of Neurosurgery, The Second Affiliated Hospital of Nanchang University, Nanchang, China.,Jiangxi Key Laboratory of Neurological Tumors and Cerebrovascular Diseases, Nanchang, China.,Institute of Neuroscience, Nanchang University, Nanchang, China.,Jiangxi Health Commission (JXHC) Key Laboratory of Neurological Medicine, Nanchang, China
| | - Jie Peng
- The Second Clinical Medical College of Nanchang University, Nanchang, China
| | - Xiaoyan Long
- East China Institute of Digital Medical Engineering, Shangrao, China
| | - Jingying Li
- Department of Comprehensive Intensive Care Unit, The Second Affiliated Hospital of Nanchang University, Nanchang, China
| | - Lei Wu
- Department of Neurosurgery, The Second Affiliated Hospital of Nanchang University, Nanchang, China.,Jiangxi Key Laboratory of Neurological Tumors and Cerebrovascular Diseases, Nanchang, China.,Institute of Neuroscience, Nanchang University, Nanchang, China.,Jiangxi Health Commission (JXHC) Key Laboratory of Neurological Medicine, Nanchang, China
| | - Kai Huang
- Department of Neurosurgery, The Second Affiliated Hospital of Nanchang University, Nanchang, China.,Jiangxi Key Laboratory of Neurological Tumors and Cerebrovascular Diseases, Nanchang, China.,Institute of Neuroscience, Nanchang University, Nanchang, China.,Jiangxi Health Commission (JXHC) Key Laboratory of Neurological Medicine, Nanchang, China
| | - Xingen Zhu
- Department of Neurosurgery, The Second Affiliated Hospital of Nanchang University, Nanchang, China.,Jiangxi Key Laboratory of Neurological Tumors and Cerebrovascular Diseases, Nanchang, China.,Institute of Neuroscience, Nanchang University, Nanchang, China.,Jiangxi Health Commission (JXHC) Key Laboratory of Neurological Medicine, Nanchang, China
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6
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Zhou YT, Qiu JJ, Wang Y, Liu PC, Lv Q, Du ZG. Sperm Protein Antigen 17 Expression Correlates With Lymph Node Metastasis and Worse Overall Survival in Patients With Breast Cancer. Front Oncol 2019; 9:710. [PMID: 31417875 PMCID: PMC6685407 DOI: 10.3389/fonc.2019.00710] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2019] [Accepted: 07/17/2019] [Indexed: 02/05/2023] Open
Abstract
Purpose: The expression and role of sperm protein antigen 17 (SPA17), which has been confirmed to be immunogenic, in breast cancer remain unclear. We examined the expression of SPA17 in breast cancer and assessed its effect on patient prognosis and its function in breast cancer development. Methods: SPA17 expression was evaluated by immunohistochemistry and Q-RT-PCR in 120 breast tissue samples. Correlation of SPA17 expression with the patients' clinicopathological parameters and overall survival was assessed. The function of SPA17 was also explored. Results: By reviewing Gene Expression Omnibus datasets, we found that SPA17 expression in ductal breast carcinoma in situ (log2[fold change] = 1.14, p-value = 0.004) and invasive ductal breast cancer (log2[fold change] = 1.03, p-value = 0.016) tissues was 2.20 and 2.05 times higher, respectively, than that in normal breast tissues. Our result also showed that 27% (27/100) of breast cancer samples expressed SPA17 but none of the normal breast (0/20) samples did. Lymph node metastasis (p < 0.001) and molecular subtyping (p = 0.002) were independent factors associated with SPA17 expression. Most importantly, SPA17 expression resulted in poor prognosis. In addition, cell function assay validated that SPA17 increased the migration (p < 0.001) and invasion (p = 0.007) of breast cancer cells, but not affected the proliferation of breast cancer cells. Conclusion: Our results demonstrated the vital role of SPA17 in the development and metastasis of breast cancer and that SPA17 may be a new therapeutic target in improving breast cancer prognosis.
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Affiliation(s)
- Yu-Ting Zhou
- West China Hospital, Sichuan University, Chengdu, China
| | - Juan-Juan Qiu
- West China Hospital, Sichuan University, Chengdu, China
| | - Yao Wang
- West China Hospital, Sichuan University, Chengdu, China
| | | | - Qing Lv
- West China Hospital, Sichuan University, Chengdu, China
| | - Zheng-Gui Du
- West China Hospital, Sichuan University, Chengdu, China
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7
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Testes and duct deferens of mice during space flight: cytoskeleton structure, sperm-specific proteins and epigenetic events. Sci Rep 2019; 9:9730. [PMID: 31278362 PMCID: PMC6611814 DOI: 10.1038/s41598-019-46324-3] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2019] [Accepted: 06/26/2019] [Indexed: 01/21/2023] Open
Abstract
To analyze the effect of gravity on the structure of germinal tissues, we examined tissues of the testes and duct deferens of mice that were exposed to space flight conditions for 21–24 days (experiment Rodent Research-4, SpaceX-10 mission, February 2017, USA). We evaluated the levels of cytoskeletal proteins, sperm-specific proteins, and epigenetic events; in particular, we evaluated levels of 5-hydroxymethylcytosine and of enzymes that regulate DNA methylation/demethylation. We did not detect changes in the levels of cytoskeletal proteins, sperm-specific proteins, DNA-methylases, DNA demethylases, DNA acetylases, or histone deacetylases. However, there were changes at the gene expression level. In particular, there was an increase in the demethylase Tet2 and a decrease in the histone deacetylase Hdac1. These gene expression changes may be of key importance during the early period of readaptation since they could lead to an increase in the expression of target genes.
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8
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Pelloni M, Paoli D, Majoli M, Pallotti F, Carlini T, Lenzi A, Lombardo F. Molecular study of human sperm RNA: Ropporin and CABYR in asthenozoospermia. J Endocrinol Invest 2018; 41:781-787. [PMID: 29247344 DOI: 10.1007/s40618-017-0804-x] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/22/2017] [Accepted: 12/02/2017] [Indexed: 12/15/2022]
Abstract
BACKGROUND Sperm motility is an essential aspect of human fertility. Sperm contain an abundance of transcripts, thought to be remnants of mRNA, which comprise a genetic fingerprint and can be considered a historic record of gene expression during spermatogenesis. The aberrant expression of numerous genes has been found to contribute to impaired sperm motility; these include ROPN1 (rhophilin associated tail protein 1), which encodes a component of the fibrous sheath of the mammalian sperm flagella, and CABYR (calcium-binding tyrosine-(Y)-phosphorylation-regulated protein), which plays an important role in calcium activation and modulation. The aim of this study was to investigate ROPN1 and CABYR gene co-expression in asthenozoospermic semen samples in comparison with normozoospermic samples. METHODS We studied 120 semen samples (60 normozoospermic and 60 asthenozoospermic) from Caucasian patients attending our centre for an andrological check-up. Total RNA was extracted from purified spermatozoa with RNeasy mini kit. ROPN1 and CABYR mRNA expression was analysed using RT-qPCR. Continuous variables were described as means ± standard deviations. RESULTS ROPN1 and CABYR mRNA were simultaneously downregulated in asthenozoospermic in comparison with normozoospermic samples. There was also a positive correlation between total progressive motility and ROPN1 and CABYR gene expression and between total motile sperm number and ROPN1 and CABYR gene expression. CONCLUSIONS The results demonstrated downregulation of both ROPN1 and CABYR in asthenozoospermic samples and importantly, a positive correlation between the expression of the two genes, suggesting that ROPN1 and CABYR co-expression is a prerequisite for normal flagellar function and sperm motility.
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Affiliation(s)
- M Pelloni
- Laboratory of Seminology-Sperm Bank "Loredana Gandini", Department of Experimental Medicine, University of Rome "La Sapienza", Viale del Policlinico 155, 00161, Rome, Italy
| | - D Paoli
- Laboratory of Seminology-Sperm Bank "Loredana Gandini", Department of Experimental Medicine, University of Rome "La Sapienza", Viale del Policlinico 155, 00161, Rome, Italy.
| | - M Majoli
- Laboratory of Seminology-Sperm Bank "Loredana Gandini", Department of Experimental Medicine, University of Rome "La Sapienza", Viale del Policlinico 155, 00161, Rome, Italy
| | - F Pallotti
- Laboratory of Seminology-Sperm Bank "Loredana Gandini", Department of Experimental Medicine, University of Rome "La Sapienza", Viale del Policlinico 155, 00161, Rome, Italy
| | - T Carlini
- Laboratory of Seminology-Sperm Bank "Loredana Gandini", Department of Experimental Medicine, University of Rome "La Sapienza", Viale del Policlinico 155, 00161, Rome, Italy
| | - A Lenzi
- Laboratory of Seminology-Sperm Bank "Loredana Gandini", Department of Experimental Medicine, University of Rome "La Sapienza", Viale del Policlinico 155, 00161, Rome, Italy
| | - F Lombardo
- Laboratory of Seminology-Sperm Bank "Loredana Gandini", Department of Experimental Medicine, University of Rome "La Sapienza", Viale del Policlinico 155, 00161, Rome, Italy
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9
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Intasqui P, Agarwal A, Sharma R, Samanta L, Bertolla RP. Towards the identification of reliable sperm biomarkers for male infertility: A sperm proteomic approach. Andrologia 2017; 50. [DOI: 10.1111/and.12919] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/01/2017] [Indexed: 01/20/2023] Open
Affiliation(s)
- P. Intasqui
- American Center for Reproductive Medicine; Cleveland Clinic; Cleveland OH USA
- Department of Surgery; Division of Urology; Human Reproduction Section; Sao Paulo Federal University - Sao Paulo Hospital; Sao Paulo Brazil
| | - A. Agarwal
- American Center for Reproductive Medicine; Cleveland Clinic; Cleveland OH USA
| | - R. Sharma
- American Center for Reproductive Medicine; Cleveland Clinic; Cleveland OH USA
| | - L. Samanta
- Department of Zoology; Ravenshaw University; Cuttack India
| | - R. P. Bertolla
- Department of Surgery; Division of Urology; Human Reproduction Section; Sao Paulo Federal University - Sao Paulo Hospital; Sao Paulo Brazil
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10
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Young SAM, Miyata H, Satouh Y, Aitken RJ, Baker MA, Ikawa M. CABYR is essential for fibrous sheath integrity and progressive motility in mouse spermatozoa. J Cell Sci 2016; 129:4379-4387. [PMID: 27802166 DOI: 10.1242/jcs.193151] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2016] [Accepted: 10/13/2016] [Indexed: 12/29/2022] Open
Abstract
Ca2+-binding tyrosine-phosphorylation-regulated protein (CABYR) has been implicated in sperm physiological function in several in vitro studies. It has also been implicated as a potential cause of and diagnostic tool in asthenozoospermic human males. CABYR is known to be localized to the fibrous sheath, an accessory structure in the flagellar principal piece. Utilizing the CRISPR-Cas9 technology, we have knocked out this gene in mice to understand its role in male fertility. Cabyr-knockout male mice showed severe subfertility with a defect in sperm motility as well as a significant disorganization in the fibrous sheath. Further, abnormal configuration of doublet microtubules was observed in the Cabyr-knockout spermatozoa, suggesting that the fibrous sheath is important for the correct organization of the axoneme. Our results show that it is the role of CABYR in the formation of the fibrous sheath that is essential for male fertility.
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Affiliation(s)
- Samantha A M Young
- Priority Research Centre in Reproductive Science, Discipline of Biological Sciences, Faculty of Science and IT, University of Newcastle, Callaghan, New South Wales 2308, Australia.,Department of Experimental Genome Research, Research Institute for Microbial Diseases, Osaka University, Suita, Osaka 565-0871, Japan
| | - Haruhiko Miyata
- Department of Experimental Genome Research, Research Institute for Microbial Diseases, Osaka University, Suita, Osaka 565-0871, Japan
| | - Yuhkoh Satouh
- Animal Resource Center for Infectious Diseases, Research Institute for Microbial Diseases, Osaka University, Suita, Osaka 565-0871, Japan
| | - Robert John Aitken
- Priority Research Centre in Reproductive Science, Discipline of Biological Sciences, Faculty of Science and IT, University of Newcastle, Callaghan, New South Wales 2308, Australia
| | - Mark A Baker
- Priority Research Centre in Reproductive Science, Discipline of Biological Sciences, Faculty of Science and IT, University of Newcastle, Callaghan, New South Wales 2308, Australia
| | - Masahito Ikawa
- Department of Experimental Genome Research, Research Institute for Microbial Diseases, Osaka University, Suita, Osaka 565-0871, Japan .,Animal Resource Center for Infectious Diseases, Research Institute for Microbial Diseases, Osaka University, Suita, Osaka 565-0871, Japan
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Liu Y, Tian X, Jiang S, Ren X, Liu F, Yang J, Chen Y, Jiang Y. Umbilical cord blood-derived dendritic cells infected by adenovirus for SP17 expression induce antigen-specific cytotoxic T cells against NSCLC cells. Cell Immunol 2015; 298:18-24. [DOI: 10.1016/j.cellimm.2015.08.004] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2015] [Revised: 08/09/2015] [Accepted: 08/17/2015] [Indexed: 12/25/2022]
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12
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Labas V, Spina L, Belleannee C, Teixeira-Gomes AP, Gargaros A, Dacheux F, Dacheux JL. Analysis of epididymal sperm maturation by MALDI profiling and top-down mass spectrometry. J Proteomics 2015; 113:226-43. [DOI: 10.1016/j.jprot.2014.09.031] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2014] [Revised: 09/17/2014] [Accepted: 09/30/2014] [Indexed: 12/27/2022]
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13
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Arnaboldi F, Menon A, Menegola E, Di Renzo F, Mirandola L, Grizzi F, Figueroa JA, Cobos E, Jenkins M, Barajon I, Chiriva-Internati M. Sperm protein 17 is an oncofetal antigen: a lesson from a murine model. Int Rev Immunol 2014; 33:367-74. [PMID: 24811209 DOI: 10.3109/08830185.2014.911856] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Sperm protein 17 (Sp17) was originally identified in the flagellum of spermatozoa and subsequently included in the subfamily of tumor-associated antigens known as cancer-testes antigens (CTA). Sp17 has been associated with the motility and migratory capacity in tumor cells, representing a link between gene expression patterns in germinal and tumor cells of different histological origins. Here we review the relevance of Sp17 expression in the mouse embryo and cancerous tissues, and present additional data demonstrating Sp17 complex expression pattern in this murine model. The expression of Sp17 in embryonic as well as adult neoplastic cells, but not normal tissues, suggests this protein should be considered an "oncofetal antigen." Further investigations are necessary to elucidate the mechanisms and functional significance of Sp17 aberrant expression in human adult cells and its implication in the pathobiology of cancer.
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Affiliation(s)
- F Arnaboldi
- 1Department of Human Morphology and Biomedical Sciences, University of Milan, Milan, Italy
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Chapman KB, Prendes MJ, Kidd JL, Sternberg H, West MD, Wagner J. Elevated expression of cancer/testis antigen FSIP1 in ER-positive breast tumors. Biomark Med 2014; 7:601-11. [PMID: 23905897 DOI: 10.2217/bmm.13.58] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022] Open
Abstract
AIM The study aimed to identify and characterize highly specific breast tumor biomarkers. METHODS A microarray data set comprised of 513 diverse normal and tumor mRNA samples was analyzed to identify breast tumor biomarkers with minimal expression in normal tissues. RESULTS FSIP1 was identified as a breast tumor biomarker with elevated mRNA expression in breast tumors and minimal expression in most normal tissues except the testis. Quantitative real-time PCR confirmed the elevated expression of FSIP1 mRNA in breast tumors and revealed a significant correlation with ER-positive status. Immunofluorescence staining of breast tumor sections showed that the majority of breast tumors examined in this study (20 out of 22) expressed detectable FSIP1 protein, with significantly higher than average expression in ER-positive versus ER-negative breast tumors. CONCLUSION The prevalence and uniformity of FSIP1 expression in breast tumors, taken together with the highly restricted expression in normal tissues, suggests that FSIP1 may be an attractive target for breast cancer immunotherapy.
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Affiliation(s)
- Karen B Chapman
- OncoCyte Corporation, 1301 Harbor Bay Parkway, Alameda, CA 94502, USA.
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15
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Hillman P, Ickowicz D, Vizel R, Breitbart H. Dissociation between AKAP3 and PKARII promotes AKAP3 degradation in sperm capacitation. PLoS One 2013; 8:e68873. [PMID: 23894359 PMCID: PMC3720880 DOI: 10.1371/journal.pone.0068873] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2013] [Accepted: 05/31/2013] [Indexed: 12/24/2022] Open
Abstract
Ejaculated spermatozoa must undergo a series of biochemical modifications called capacitation, prior to fertilization. Protein-kinase A (PKA) mediates sperm capacitation, although its regulation is not fully understood. Sperm contain several A-kinase anchoring proteins (AKAPs), which are scaffold proteins that anchor PKA. In this study, we show that AKAP3 is degraded in bovine sperm incubated under capacitation conditions. The degradation rate is variable in sperm from different bulls and is correlated with the capacitation ability. The degradation of AKAP3 was significantly inhibited by MG-132, a proteasome inhibitor, indicating that AKAP3 degradation occurs via the proteasomal machinery. Treatment with Ca2+-ionophore induced further degradation of AKAP3; however, this effect was found to be enhanced in the absence of Ca2+ in the medium or when intracellular Ca2+ was chelated the degradation rate of AKAP3 was significantly enhanced when intracellular space was alkalized using NH4Cl, or when sperm were treated with Ht31, a peptide that contains the PKA-binding domain of AKAPs. Moreover, inhibition of PKA activity by H89, or its activation using 8Br-cAMP, increased AKAP3 degradation rate. This apparent contradiction could be explained by assuming that binding of PKA to AKAP3 protects AKAP3 from degradation. We conclude that AKAP3 degradation is regulated by intracellular alkalization and PKARII anchoring during sperm capacitation.
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Affiliation(s)
- Pnina Hillman
- Mina & Everard Goodman Faculty of Life Sciences, Bar-Ilan University, Ramat-Gan, Israel.
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16
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Pandey A, Kurup A, Shrivastava A, Radhi S, Nguyen DD, Arentz C, D'Chuna N, Hardwick F, D'Souza MJ, Jenkins M, Grizzi F, Kast WM, Cobos E, Rahman R, Chiriva-Internati M, Chiaramonte R, Platonova N. Cancer testes antigens in breast cancer: biological role, regulation, and therapeutic applicability. Int Rev Immunol 2013; 31:302-20. [PMID: 23083343 DOI: 10.3109/08830185.2012.723511] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Breast cancer remains one of the leading causes of death among women across the world. The last few decades have seen significant reduction in mortality owing to earlier detection and better adjuvant treatments that were developed based on clinical staging and morphological features. As these treatments have evolved, the heterogeneity of breast cancer poses a new challenge, since there is no standard gold-therapy suitable for all tumors of the mammary gland. Therefore, contemporary management and research efforts are directed toward specific prognostic and predictive molecular signatures that can guide targeted individualized therapy. The goal of ongoing research in this field is to identify specific molecular targets for developing novel therapeutic approaches. These targets can also serve to improve screening of breast cancer. This review focuses on the role of cancer testis antigens (CTAs) in breast carcinogenesis and explores the potential for development of targeted screening and therapeutic approaches. Normally found in the testes, these antigens are highly correlative with cancers of the breast, skin, and ovaries. These implications have been further corroborated through uncovering the interaction of CTAs with genes and proteins involved in tumor suppression and homeostasis like p53. There is some evidence that these genes can be targeted for early detection in addition to being candidates for cancer immunotherapy.
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Affiliation(s)
- Apurva Pandey
- Department of Internal Medicine at the Division of Hematology & Oncology, Texas Tech University Health Sciences Center and Southwest Cancer Treatment and Research Center, Lubbock, TX 79430, USA
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17
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Chiriva-Internati M, Pandey A, Saba R, Kim M, Saadeh C, Lukman T, Chiaramonte R, Jenkins M, Cobos E, Jumper C, Alalawi R. Cancer testis antigens: a novel target in lung cancer. Int Rev Immunol 2013; 31:321-43. [PMID: 23083344 DOI: 10.3109/08830185.2012.723512] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Lung cancer is the main cause of cancer mortality worldwide. This is mainly due to the fact that it is diagnosed in advanced stage patients, which are no more surgically curable. Consequently, searching for novel treatments and new modalities for early diagnosis offers great promise to improve the clinical outcome. Recently, a new group of antigens, the cancer testis antigens, have been described as possible early diagnostic tools and therapeutic targets in cancer therapy.This review will report emerging evidences of cancer testis antigens deregulation in lung cancer and explore the state of the art of their currently known role and potential as markers for early diagnosis and disease progression and targets of an immunotherapeutic approach aiming to improve the cure rate of this tumor.
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Affiliation(s)
- Maurizio Chiriva-Internati
- Department of Internal Medicine, Division of Hematology & Oncology and Pulmonary and Critical Care Medicine, The Southwest Cancer Treatment and Research Center, Texas Tech University Health Sciences Center, Lubbock, TX 79430, USA.
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18
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Fiedler SE, Dudiki T, Vijayaraghavan S, Carr DW. Loss of R2D2 proteins ROPN1 and ROPN1L causes defects in murine sperm motility, phosphorylation, and fibrous sheath integrity. Biol Reprod 2013; 88:41. [PMID: 23303679 DOI: 10.1095/biolreprod.112.105262] [Citation(s) in RCA: 72] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023] Open
Abstract
The fibrous sheath (FS) is a flagellar cytoskeletal structure unique to sperm that surrounds the outer dense fibers and axoneme. Its primary components are A-kinase anchoring proteins (AKAPs) 3 and 4, which suggests that the FS affects flagellar beating via the scaffolding of signaling pathways necessary for motility. Sperm proteins ROPN1 and ROPN1L bind AKAP3. To determine the role of ROPN1 and ROPN1L in sperm function, we created mice deficient in ROPN1 (RKO), mice deficient in ROPN1L (RLKO), and double knockout mice (DKO). All three strains of mice had normal testicular morphology and spermatogenesis. Only the DKOs had obvious defects in sperm morphology (thinning and shredding of the principal piece), which was accompanied by a reduction in AKAP3 levels. RLKO mice had slightly reduced sperm motility and increased levels of ROPN1. RKO mice had moderately impaired motility and increased levels of ROPN1L. DKO sperm were immotile. We have previously determined that RKO male mice are subfertile, and DKO males are infertile. Together these data indicate that ROPN1L and ROPN1 compensate for each other in the absence of the opposing protein, possibly to maintain AKAP3 incorporation in the FS. Sperm from mice lacking ROPN1L exhibited reductions in both cAMP-dependent protein kinase (PKA) phosphorylation of a 270-kDa protein (perhaps FSCB), and in capacitation-induced tyrosine phosphorylation. Sperm from mice lacking ROPN1 had reduced levels of FSCB and increased tyrosine phosphorylation of noncapacitated sperm. These data demonstrate that mutations in ROPN1 and ROPN1L can cause defects in FS integrity, sperm motility, and PKA-dependent signaling processes, leading to male infertility.
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Affiliation(s)
- Sarah E Fiedler
- Portland Veterans Affairs Medical Center and Department of Medicine, Oregon Health & Science University, Portland, OR 97239, USA
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19
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Cheng YH, Wong EW, Cheng CY. Cancer/testis (CT) antigens, carcinogenesis and spermatogenesis. SPERMATOGENESIS 2011; 1:209-220. [PMID: 22319669 PMCID: PMC3271663 DOI: 10.4161/spmg.1.3.17990] [Citation(s) in RCA: 69] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/05/2011] [Revised: 09/01/2011] [Accepted: 09/05/2011] [Indexed: 02/07/2023]
Abstract
During spermatogenesis, spermatogonial stem cells, undifferentiated and differentiated spermatogonia, spermatocytes, spermatids and spermatozoa all express specific antigens, yet the functions of many of these antigens remain unexplored. Studies in the past three decades have shown that many of these transiently expressed genes in developing germ cells are proto-oncogenes and oncogenes, which are expressed only in the testis and various types of cancers in humans and rodents. As such, these antigens are designated cancer/testis antigens (CT antigens). Since the early 1980s, about 70 families of CT antigens have been identified with over 140 members are known to date. Due to their restricted expression in the testis and in various tumors in humans, they have been used as the target of immunotherapy. Multiple clinical trials at different phases are now being conducted with some promising results. Interestingly, in a significant number of cancer patients, antibodies against some of these CT antigens were detected in their sera. However, antibodies against these CT antigens in humans under normal physiological conditions have yet to be reported even though many of these antigens are residing outside of the blood-testis barrier (BTB), such as in the basal compartment of the seminiferous epithelium and in the stem cell niche in the testis. In this review, we summarize latest findings in the field regarding several selected CT antigens which may be intimately related to spermatogenesis due to their unusual restricted expression during different discrete events of spermatogenesis, such as cell cycle progression, meiosis and spermiogenesis. This information should be helpful to investigators in the field to study the roles of these oncogenes in spermatogenesis.
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Affiliation(s)
- Yan-Ho Cheng
- Center for Biomedical Research; The Population Council; New York, NY USA
- Richmond University Medical Center; Staten Island, NY USA
| | - Elissa Wp Wong
- Center for Biomedical Research; The Population Council; New York, NY USA
| | - C Yan Cheng
- Center for Biomedical Research; The Population Council; New York, NY USA
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20
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Chiriva-Internati M. Sperm Protein 17: Clinical Relevance of a Cancer/Testis Antigen, from Contraception to Cancer Immunotherapy, and Beyond. Int Rev Immunol 2011; 30:138-49. [DOI: 10.3109/08830185.2011.569903] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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21
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Li YF, He W, Mandal A, Kim YH, Digilio L, Klotz K, Flickinger CJ, Herr JC, Herr JC. CABYR binds to AKAP3 and Ropporin in the human sperm fibrous sheath. Asian J Androl 2011; 13:266-74. [PMID: 21240291 DOI: 10.1038/aja.2010.149] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
Abstract
Calcium-binding tyrosine phosphorylation-regulated protein (CABYR) is a highly polymorphic calcium-binding tyrosine- and serine-/threonine-phosphorylated fibrous sheath (FS) protein involved in capacitation. A putative domain (amino acids 12-48) homologous to the regulatory subunit of type II cAMP-dependent protein kinase A (RII) dimerisation and A kinase-anchoring protein (AKAP)-binding domains of protein kinase A at the N-terminus suggests that CABYR may self-assemble and bind to AKAPs. Moreover, there is evidence that CABYR has limited interaction with AKAPs. However, further evidence and new relationships between CABYR and other FS proteins, including AKAPs, will be helpful in understanding the basic physiology of FS. In this study, a new strategy for co-immunoprecipitation of insoluble proteins, as well as the standard co-immunoprecipitation method in combination with mass spectrometry and western blot, was employed to explore the relationship between CABYR, AKAP3 and Ropporin. The results showed that AKAP3 was co-immunoprecipitated with CABYR by the anti-CABYR-A polyclonal antibody, and, conversely, CABYR was also co-immunoprecipitated with AKAP3 by the anti-AKAP3 polyclonal antibody. Another RII-like domain containing protein, Ropporin, was also co-immunoprecipitated with CABYR, indicating that Ropporin is one of CABYR's binding partners. The interactions between CABYR, AKAP3 and Ropporin were confirmed by yeast two-hybrid assays. Further analysis showed that CABYR not only binds to AKAP3 by its RII domain but binds to Ropporin through other regions besides the RII-like domain. This is the first demonstration that CABYR variants form a complex not only with the scaffolding protein AKAP3 but also with another RII-like domain-containing protein in the human sperm FS.
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Affiliation(s)
- Yan-Feng Li
- Department of Urology, Daping Hospital, Institute of Surgery Research, Third Military Medical University, Chongqing 400042, China.
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22
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Li YF, He W, Kim YH, Mandal A, Digilio L, Klotz K, Flickinger CJ, Herr JC. CABYR isoforms expressed in late steps of spermiogenesis bind with AKAPs and ropporin in mouse sperm fibrous sheath. Reprod Biol Endocrinol 2010; 8:101. [PMID: 20731842 PMCID: PMC3398308 DOI: 10.1186/1477-7827-8-101] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/11/2010] [Accepted: 08/23/2010] [Indexed: 11/12/2022] Open
Abstract
BACKGROUND CABYR is a polymorphic calcium-binding protein of the sperm fibrous sheath (FS) which gene contains two coding regions (CR-A and CR-B) and is tyrosine as well as serine/threonine phosphorylated during in vitro sperm capacitation. Thus far, the detailed information on CABYR protein expression in mouse spermatogenesis is lacking. Moreover, because of the complexity of this polymorphic protein, there are no data on how CABYR isoforms associate and assemble into the FS. METHODS The capacity of mouse CABYR isoforms to associate into dimers and oligomers, and the relationships between CABYR and other FS proteins were studied by gel electrophoresis, Western blotting, immunofluorescence, immunoprecipitation and yeast two-hybrid analyses. RESULTS The predominant form of mouse CABYR in the FS is an 80 kDa variant that contains only CABYR-A encoded by coding region A. CABYR isoforms form dimers by combining the 80 kDa CABYR-A-only variant with the 50 kDa variant that contains both CABYR-A and CABYR-B encoded by full length or truncated coding region A and B. It is proposed that this step is followed by the formation of larger oligomers, which then participate in the formation of the supramolecular structure of the FS in mouse sperm. The initial expression of CABYR occurs in the cytoplasm of spermatids at step 11 of spermiogenesis and increases progressively during steps 12-15. CABYR protein gradually migrates into the sperm flagellum and localizes to the FS of the principal piece during steps 15-16. Deletion of the CABYR RII domain abolished the interaction between CABYR and AKAP3/AKAP4 but did not abolish the interaction between CABYR and ropporin suggesting that CABYR binds to AKAP3/AKAP4 by its RII domain but binds to ropporin through another as yet undefined region. CONCLUSIONS CABYR expresses at the late stage of spermiogenesis and its isoforms oligomerize and bind with AKAPs and ropporin. These interactions strongly suggest that CABYR participates in the assembly of complexes in the FS, which may be related to calcium signaling.
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Affiliation(s)
- Yan-Feng Li
- Department of Urology, Daping Hospital, Institute of Surgery Research, Third Military Medical University, Chongqing 400042, PR China
| | - Wei He
- Department of Obstetrics and Gynecology, Southwest Hospital, Third Military Medical University, Chongqing 400038, PR China
| | - Young-Hwan Kim
- Center for Research in Contraceptive and Reproductive Health, Department of Cell Biology, University of Virginia, P.O. Box 800732, Charlottesville, VA 22908, USA
| | - Arabinda Mandal
- Center for Research in Contraceptive and Reproductive Health, Department of Cell Biology, University of Virginia, P.O. Box 800732, Charlottesville, VA 22908, USA
| | - Laura Digilio
- Center for Research in Contraceptive and Reproductive Health, Department of Cell Biology, University of Virginia, P.O. Box 800732, Charlottesville, VA 22908, USA
| | - Ken Klotz
- Center for Research in Contraceptive and Reproductive Health, Department of Cell Biology, University of Virginia, P.O. Box 800732, Charlottesville, VA 22908, USA
| | - Charles J Flickinger
- Center for Research in Contraceptive and Reproductive Health, Department of Cell Biology, University of Virginia, P.O. Box 800732, Charlottesville, VA 22908, USA
| | - John C Herr
- Center for Research in Contraceptive and Reproductive Health, Department of Cell Biology, University of Virginia, P.O. Box 800732, Charlottesville, VA 22908, USA
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Hermo L, Pelletier RM, Cyr DG, Smith CE. Surfing the wave, cycle, life history, and genes/proteins expressed by testicular germ cells. Part 3: developmental changes in spermatid flagellum and cytoplasmic droplet and interaction of sperm with the zona pellucida and egg plasma membrane. Microsc Res Tech 2010; 73:320-63. [PMID: 19941287 DOI: 10.1002/jemt.20784] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Spermiogenesis constitutes the steps involved in the metamorphosis of spermatids into spermatozoa. It involves modification of several organelles in addition to the formation of several structures including the flagellum and cytoplasmic droplet. The flagellum is composed of a neck region and middle, principal, and end pieces. The axoneme composed of nine outer microtubular doublets circularly arranged to form a cylinder around a central pair of microtubules is present throughout the flagellum. The middle and principal pieces each contain specific components such as the mitochondrial sheath and fibrous sheath, respectively, while outer dense fibers are common to both. A plethora of proteins are constituents of each of these structures, with each playing key roles in functions related to the fertility of spermatozoa. At the end of spermiogenesis, a portion of spermatid cytoplasm remains associated with the released spermatozoa, referred to as the cytoplasmic droplet. The latter has as its main feature Golgi saccules, which appear to modify the plasma membrane of spermatozoa as they move down the epididymal duct and hence may be partly involved in male gamete maturation. The end product of spermatogenesis is highly streamlined and motile spermatozoa having a condensed nucleus equipped with an acrosome. Spermatozoa move through the female reproductive tract and eventually penetrate the zona pellucida and bind to the egg plasma membrane. Many proteins have been implicated in the process of fertilization as well as a plethora of proteins involved in the development of spermatids and sperm, and these are high lighted in this review.
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Affiliation(s)
- Louis Hermo
- Department of Anatomy and Cell Biology, Faculty of Medicine, McGill University, Montreal, Quebec, Canada H3A 2B2.
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24
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Kausar T, Ahsan A, Hasan MR, Lin L, Beer DG, Ralhan R. Sperm protein 17 is a novel marker for predicting cisplatin response in esophageal squamous cancer cell lines. Int J Cancer 2010; 126:1494-503. [PMID: 19685492 DOI: 10.1002/ijc.24828] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Expression of sperm protein 17 (Sp17) mRNA has been reported in various malignancies. In an earlier study, we reported the upregulation of Sp17 transcripts in primary esophageal squamous cell carcinomas (ESCCs) using differential display and detected Sp17 transcripts in 86% of ESCCs by RT-PCR, whereas no transcripts were detected in the paired normal esophageal tissues. Herein we hypothesized that Sp17 might be used as a marker for detecting the response of anticancer therapies in ESCCs. Our results indicated that Sp17 protein levels in esophageal squamous cancer cell lines decreased in response to treatment with (i) the HSP90 activity inhibitor geldanamycin, (ii) the tyrosine kinase inhibitor erlotinib and (iii) cisplatin (chemotherapeutic agent commonly used in management of ESCC). In contrast, the Sp17 levels did not decrease in response to radiation therapy and treatment with the chemotherapeutic agent, gemcitabine. Further investigations showed that cisplatin induced decrease in Sp17 levels was due to transcriptional inhibition and cisplatin-resistant cell lines did not show this decrease in Sp17 levels in response to cisplatin treatment. In addition, we also carried our mass spectophotometric analysis to identify the binding partners of Sp17 to characterize its possible involvement in esophageal tumorigenesis and chemoresistance.
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Affiliation(s)
- Tasneem Kausar
- Department of Biochemistry, All India Institute of Medical Science, New Delhi, India
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25
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Konno A, Padma P, Ushimaru Y, Inaba K. Multidimensional Analysis of Uncharacterized Sperm Proteins inCiona intestinalis: EST-Based Analysis and Functional Immunoscreening of Testis-Expressed Genes. Zoolog Sci 2010; 27:204-15. [DOI: 10.2108/zsj.27.204] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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26
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Li FQ, Han YL, Liu Q, Wu B, Huang WB, Zeng SY. Overexpression of human sperm protein 17 increases migration and decreases the chemosensitivity of human epithelial ovarian cancer cells. BMC Cancer 2009; 9:323. [PMID: 19744347 PMCID: PMC2753635 DOI: 10.1186/1471-2407-9-323] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2008] [Accepted: 09/11/2009] [Indexed: 11/20/2022] Open
Abstract
Background Most deaths from ovarian cancer are due to metastases that are resistant to conventional therapies. But the factors that regulate the metastatic process and chemoresistance of ovarian cancer are poorly understood. In the current study, we investigated the aberrant expression of human sperm protein 17 (HSp17) in human epithelial ovarian cancer cells and tried to analyze its influences on the cell behaviors like migration and chemoresistance. Methods Immunohistochemistry and immunocytochemistry were used to identify HSp17 in paraffin embedded ovarian malignant tumor specimens and peritoneal metastatic malignant cells. Then we examined the effect of HSp17 overexpression on the proliferation, migration, and chemoresistance of ovarian cancer cells to carboplatin and cisplatin in a human ovarian carcinoma cell line, HO8910. Results We found that HSp17 was aberrantly expressed in 43% (30/70) of the patients with primary epithelial ovarian carcinomas, and in all of the metastatic cancer cells of ascites from 8 patients. The Sp17 expression was also detected in the metastatic lesions the same as in ovarian lesions. None of the 7 non-epithelial tumors primarily developed in the ovaries was immunopositive for HSp17. Overexpression of HSp17 increased the migration but decreased the chemosensitivity of ovarian carcinoma cells to carboplatin and cisplatin. Conclusion HSp17 is aberrantly expressed in a significant proportion of epithelial ovarian carcinomas. Our results strongly suggest that HSp17 plays a role in metastatic disease and resistance of epithelial ovarian carcinoma to chemotherapy.
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Affiliation(s)
- Fang-Qiu Li
- Laboratory of Molecular Biology, Institute of Medical Laboratory Sciences, Jinling Hospital, School of Medicine, Nanjing University, Nanjing, PR China.
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27
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Chiriva-Internati M, Gagliano N, Donetti E, Costa F, Grizzi F, Franceschini B, Albani E, Levi-Setti PE, Gioia M, Jenkins M, Cobos E, Kast WM. Sperm protein 17 is expressed in the sperm fibrous sheath. J Transl Med 2009; 7:61. [PMID: 19604394 PMCID: PMC2727497 DOI: 10.1186/1479-5876-7-61] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2008] [Accepted: 07/15/2009] [Indexed: 11/23/2022] Open
Abstract
Background Sperm protein 17 (Sp17) is a highly conserved mammalian protein characterized in rabbit, mouse, monkey, baboon, macaque, human testis and spermatozoa. mRNA encoding Sp17 has been detected in a range of murine and human somatic tissues. It was also recognized in two myeloma cell lines and in neoplastic cells from patients with multiple myeloma and ovarian carcinoma. These data all indicate that Sp17 is widely distributed in humans, expressed not only in germinal cells and in a variety of somatic tissues, but also in neoplastic cells of unrelated origin. Methods Sp17 expression was analyzed by immunocytochemistry and transmission electron microscopy on spermatozoa. Results Here, we demonstrate the ultrastructural localization of human Sp17 throughout the spermatozoa flagellar fibrous sheath, and its presence in spermatozoa during in vitro states from their ejaculation to the oocyte fertilization. Conclusion These findings suggest a possible role of Sp17 in regulating sperm maturation, capacitation, acrosomal reaction and interactions with the oocyte zona pellucida during the fertilization process. Further, the high degree of sequence conservation throughout its N-terminal half, and the presence of an A-kinase anchoring protein (AKAP)-binding motif within this region, suggest that Sp17 might play a regulatory role in a protein kinase A-independent AKAP complex in both germinal and somatic cells.
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28
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Newell AEH, Fiedler SE, Ruan JM, Pan J, Wang PJ, Deininger J, Corless CL, Carr DW. Protein kinase A RII-like (R2D2) proteins exhibit differential localization and AKAP interaction. ACTA ACUST UNITED AC 2008; 65:539-52. [PMID: 18421703 DOI: 10.1002/cm.20279] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
A-kinase anchoring proteins (AKAPs) bind to protein kinase A (PKA) via an amphipathic helix domain that interacts with a dimerization/docking domain on the regulatory (R) subunit of PKA. Four other mammalian proteins (ROPN1, ASP, SP17, and CABYR) also contain a highly conserved RII dimerization/docking (R2D2) domain, suggesting all four proteins may interact with all AKAPs in a manner similar to RII. All four of these proteins were originally detected in the flagellum of mammalian sperm. In this report, we demonstrate that all four R2D2 proteins are expressed in a wide variety of tissues and three of the proteins SP17, CABYR, and ASP are located in motile cilia of human bronchus and fallopian tubes. In addition, we detect SP17 in primary cilia. We also provide evidence that ROPN1 and ASP bind to a variety of AKAPs and this interaction can be disrupted with anchoring inhibitor peptides. The interaction of SP17 and CABYR with AKAPs appears to be much more limited. None of the R2D2 proteins appears to bind cAMP, a fundamental characteristic of the regulatory subunits of PKA. These observations suggest that R2D2 proteins utilize docking interactions with AKAPs to accomplish their function of regulating cilia and flagella. Based on location, affinity for AKAPs and lack of affinity for cAMP, it appears that each R2D2 protein has a unique role in this process.
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Affiliation(s)
- Amy E Hanlon Newell
- VA Medical Center and Department of Medicine, Oregon Health & Science University, Portland, Oregon, USA
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Scholten A, Aye TT, Heck AJR. A multi-angular mass spectrometric view at cyclic nucleotide dependent protein kinases: in vivo characterization and structure/function relationships. MASS SPECTROMETRY REVIEWS 2008; 27:331-353. [PMID: 18381623 DOI: 10.1002/mas.20166] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
Mass spectrometry has evolved in recent years to a well-accepted and increasingly important complementary technique in molecular and structural biology. Here we review the many contributions mass spectrometry based studies have made in recent years in our understanding of the important cyclic nucleotide activated protein kinase A (PKA) and protein kinase G (PKG). We both describe the characterization of kinase isozymes, substrate phosphorylation, binding partners and post-translational modifications by proteomics based methodologies as well as their structural and functional properties as revealed by native mass spectrometry, H/D exchange MS and ion mobility. Combining all these mass spectrometry based data with other biophysical and biochemical data has been of great help to unravel the intricate regulation of kinase function in the cell in all its magnificent complexity.
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Affiliation(s)
- Arjen Scholten
- Biomolecular Mass Spectrometry & Proteomics Group, Utrecht Institute of Pharmaceutical Sciences and Bijvoet Center for Biomolecular Research, Utrecht University, Sorbonnelaan 16, 3584CA, Utrecht, The Netherlands
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30
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McClintock TS, Glasser CE, Bose SC, Bergman DA. Tissue expression patterns identify mouse cilia genes. Physiol Genomics 2007; 32:198-206. [PMID: 17971504 DOI: 10.1152/physiolgenomics.00128.2007] [Citation(s) in RCA: 114] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023] Open
Abstract
In mammals, cilia are critical for development, sensation, cell signaling, sperm motility, and fluid movement. Defects in cilia are causes of several congenital syndromes, providing additional reasons to identify cilia-related genes. We hypothesized that mRNAs selectively abundant in tissues rich in highly ciliated cells encode cilia proteins. Selective abundance in olfactory epithelium, testes, vomeronasal organ, trachea, and lung proved to be an expression pattern uniquely effective in identifying documented cilia-related genes. Known and suspected cilia-related genes were statistically overrepresented among the 99 genes identified, but the majority encoded proteins of unknown function, thereby predicting new cilia-related proteins. Evidence of expression in a highly ciliated cell, the olfactory sensory neuron, exists for 73 of the genes. In situ hybridization for 17 mRNAs confirmed expression of all 17 in olfactory sensory neurons. Most were also detected in vomeronasal sensory neurons and in neighboring tissues rich in ciliated cells such as respiratory epithelium. Immunoreactivity for one of the proteins identified, Spa17, colocalized with acetylated tubulin in the cilia layer of the olfactory epithelium. In contrast, the ciliary rootlet protein, Crocc, was located in discrete structures whose position was consistent with the dendritic knobs of the olfactory sensory neurons. A compilation of >2,000 mouse genes predicted to encode cilia-related proteins revealed a strong correlation (R = 0.99) between the number of studies predicting a gene's involvement in cilia and documented evidence of such involvement, a fact that simplifies the selection of genes for further study of the physiology of cilia.
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Affiliation(s)
- Timothy S McClintock
- Department of Physiology, University of Kentucky, Lexington, Kentucky 40536-0298, USA.
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31
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Fiedler SE, Bajpai M, Carr DW. Identification and characterization of RHOA-interacting proteins in bovine spermatozoa. Biol Reprod 2007; 78:184-92. [PMID: 17928627 DOI: 10.1095/biolreprod.107.062943] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
Abstract
In somatic cells, RHOA mediates actin dynamics through a GNA13-mediated signaling cascade involving RHO kinase (ROCK), LIM kinase (LIMK), and cofilin. RHOA can be negatively regulated by protein kinase A (PRKA), and it interacts with members of the A-kinase anchoring (AKAP) family via intermediary proteins. In spermatozoa, actin polymerization precedes the acrosome reaction, which is necessary for normal fertility. The present study was undertaken to determine whether the GNA13-mediated RHOA signaling pathway may be involved in acrosome reaction in bovine caudal sperm, and whether AKAPs may be involved in its targeting and regulation. GNA13, RHOA, ROCK2, LIMK2, and cofilin were all detected by Western blot in bovine caudal sperm. Overlay, immunoprecipitation, and subsequent mass spectrometry analysis identified several RHOA-interacting proteins, including proacrosin, angiotensin-converting enzyme, tubulin, aldolase C, and AKAP4. Using overlay and pulldown techniques, we demonstrate that phosphorylation of AKAP3 increases its interaction with the RHOA-interacting proteins PRKAR2 (the type II regulatory subunit of PRKA, formerly RII) and ropporin (ROPN1, a PRKAR2-like protein, or R2D2). Varying calcium concentrations in pulldown assays did not significantly alter binding to R2D2 proteins. These data suggest that the actin-regulating GNA13-mediated RHOA-ROCK-LIMK-cofilin pathway is present in bovine spermatozoa, that RHOA interacts with proteins involved in capacitation and the acrosome reaction, and that RHOA signaling in sperm may be targeted by AKAPs. Finally, AKAP3 binding to PRKAR2 and ROPN1 is regulated by phosphorylation in vitro.
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Affiliation(s)
- Sarah E Fiedler
- Department of Medicine, Oregon Health & Sciences University and Veterans Affairs Medical Center, Portland, OR 97239, USA
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Gupta G, Sharma R, Chattopadhyay TK, Gupta SD, Ralhan R. Clinical significance of sperm protein 17 expression and immunogenicity in esophageal cancer. Int J Cancer 2007; 120:1739-47. [PMID: 17230514 DOI: 10.1002/ijc.22463] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
We recently identified sperm protein 17 (Sp17) transcripts in esophageal squamous cell carcinomas (ESCCs) by differential display. This study was designed to determine the clinical significance of Sp17 protein in different stages of esophageal tumorigenesis and to test the hypothesis that aberrant localization of Sp17 protein to immunosurveillant site may lead to production of anti-Sp17 antibodies in serum, which may be of clinical relevance in ESCCs. Sp17 transcripts were detected by RT-PCR in 26 of 30 (86%) ESCCs, while no transcripts were detected in normal esophageal tissues. Rabbit polyclonal antibody was raised against an immunogenic peptide of Sp17 and used to evaluate protein expression by immunohistochemistry. Expression of Sp17 protein was observed in 60/80 (75%) of ESCCs and 27/30 (90%) dysplastic tissues, while no detectable Sp17 expression was observed in 13 distant histologically normal epithelia. Sixteen of the 60 immunopositive ESCCs showed nuclear expression in addition to cytoplasmic localization of the protein. The circulating levels of anti-Sp17 antibodies, determined by ELISA, were significantly elevated in ESCC patients when compared with normal subjects (p < 0.001). Increasing Sp17 antibody titers were observed to be associated with the progressive disease in 4 patients. In conclusion, the study demonstrates expression of Sp17 protein in esophageal tumor as well as dysplastic tissues, suggesting it to be an early event in the development of ESCC. To our knowledge, this is the first report showing elevated levels of anti-Sp17 antibodies in ESCC patients.
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MESH Headings
- Adult
- Animals
- Antibodies, Neoplasm/immunology
- Antibodies, Neoplasm/metabolism
- Antigens, Surface/genetics
- Antigens, Surface/immunology
- Antigens, Surface/metabolism
- Autoantigens/immunology
- Biomarkers, Tumor/genetics
- Biomarkers, Tumor/immunology
- Biomarkers, Tumor/metabolism
- Blotting, Northern
- Blotting, Western
- Calmodulin-Binding Proteins
- Carcinoma, Squamous Cell/genetics
- Carcinoma, Squamous Cell/immunology
- Carcinoma, Squamous Cell/metabolism
- Carrier Proteins/genetics
- Carrier Proteins/immunology
- Carrier Proteins/metabolism
- Cell Nucleus/metabolism
- Cytoplasm/metabolism
- Esophageal Neoplasms/genetics
- Esophageal Neoplasms/immunology
- Esophageal Neoplasms/metabolism
- Esophagus/immunology
- Esophagus/metabolism
- Female
- Gene Expression Regulation, Neoplastic
- Humans
- Male
- Membrane Proteins
- RNA, Messenger/genetics
- RNA, Messenger/metabolism
- Rabbits
- Reverse Transcriptase Polymerase Chain Reaction
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Affiliation(s)
- Garima Gupta
- Department of Biochemistry, All India Institute of Medical Sciences, Ansari Nagar, New Delhi 110029, India
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Nakazato T, Kanuma T, Tamura T, Faried LS, Aoki H, Minegishi T. Sperm protein 17 influences the tissue-specific malignancy of clear cell adenocarcinoma in human epithelial ovarian cancer. Int J Gynecol Cancer 2007; 17:426-32. [PMID: 17309563 DOI: 10.1111/j.1525-1438.2007.00815.x] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
Abstract
Clear cell adenocarcinoma of the ovary has a poor prognosis due to chemoresistance and early metastasis to the lymph nodes. It also can result in endometriosis and is the second most frequent type of ovarian cancer in Japan. Serous adenocarcinoma of the ovary is another common epithelial cancer tissue subtype in Japan, and it is highly sensitive to chemotherapy. In the current study, we examined the differential expression of genes in these types of ovarian cancer and tried to analyze their functions, especially as they relate to chemoresistance. We used differential display to compare clear cell carcinoma and serous adenocarcinoma of the ovary. We identified sperm protein 17 (SP17) as a candidate gene related to the chemoresistance of clear cell carcinoma. Its differential expression was confirmed by real-time polymerase chain reaction. Because the function of the SP17 gene in ovarian cancer is not known, we examined the effect of small interfering RNA targeting the SP17 gene on the chemoresistance and proliferation of ES-2 ovarian cancer cells to paclitaxel, currently the most effective treatment for ovarian cancer. We found that this treatment decreased the chemoresistance of these cells to paclitaxel. Our results strongly suggest that SP17 plays a role in the resistance of clear cell carcinoma to chemotherapy without influencing their ability to proliferate
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MESH Headings
- Adenocarcinoma, Clear Cell/genetics
- Adenocarcinoma, Clear Cell/metabolism
- Adenocarcinoma, Clear Cell/pathology
- Antigens, Surface/genetics
- Antigens, Surface/metabolism
- Calmodulin-Binding Proteins
- Carrier Proteins/antagonists & inhibitors
- Carrier Proteins/genetics
- Carrier Proteins/metabolism
- Cells, Cultured
- Cystadenocarcinoma, Serous/genetics
- Cystadenocarcinoma, Serous/metabolism
- Drug Resistance, Neoplasm/genetics
- Female
- Gene Expression Profiling
- Gene Expression Regulation, Neoplastic/drug effects
- Humans
- Membrane Proteins
- Ovarian Neoplasms/genetics
- Ovarian Neoplasms/metabolism
- Ovarian Neoplasms/pathology
- RNA, Small Interfering/pharmacology
- Reverse Transcriptase Polymerase Chain Reaction
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Affiliation(s)
- T Nakazato
- Department of Gynecology and Reproductive Medicine, Gunma University Graduate School of Medicine, Maebashi, Gunma, Japan
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Escalier D, Albert M. New fibrous sheath anomaly in spermatozoa of men with consanguinity. Fertil Steril 2006; 86:219.e1-9. [PMID: 16750828 DOI: 10.1016/j.fertnstert.2005.12.042] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2005] [Revised: 12/20/2005] [Accepted: 12/20/2005] [Indexed: 01/01/2023]
Abstract
OBJECTIVE The cause of the sperm motility impairment was investigated in infertile men. DESIGN Case report. SETTING University-based andrology laboratory. PATIENTS Two unrelated consanguineous patients. INTERVENTION(S) None. MAIN OUTCOME MEASURE(S) The sperm flagella lengths were measured using quantitative analysis software and their ultrastructural anomalies were quantitatively recorded. RESULT(S) A total of 67.5% of the flagella were truncated, and 100% lacked the medium region of the ribs of the fibrous sheath. CONCLUSION(S) The data suggested a morphogenetic anomaly at the stage where rib precursors are formed during spermiogenesis. The consanguinity of these patients suggested a genetic origin for this newly discovered anomaly of the human sperm's fibrous sheath. The family tree appears to indicate an autosomal recessive inheritance.
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Affiliation(s)
- Denise Escalier
- Functional and Molecular Histology, Paris 5 University, Andrology Laboratory, Hospital Kremlin-Bicêtre, Le Kremlin Bicêtre, France.
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35
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Cao W, Gerton GL, Moss SB. Proteomic Profiling of Accessory Structures from the Mouse Sperm Flagellum. Mol Cell Proteomics 2006; 5:801-10. [PMID: 16452089 DOI: 10.1074/mcp.m500322-mcp200] [Citation(s) in RCA: 143] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
The flagellum of a mammalian spermatozoon consists of an axoneme surrounded in distinct regions by accessory structures known as the fibrous sheath, outer dense fibers, and the mitochondrial sheath. Although the characterization of individual proteins has provided clues about the roles of these accessory structures, a more complete understanding of flagellar function requires the identification of all the polypeptides in these assemblies. Epididymal mouse sperm were treated with SDS to dislodge sperm heads and to extract the axoneme and membranous elements. The remaining flagellar accessory structures were purified by sucrose gradient centrifugation. Analysis of proteins from these structures by two-dimensional gel electrophoresis and colloidal Coomassie Blue staining showed a highly reproducible pattern of >200 spots. Individual spots were picked, digested with trypsin, and identified by mass spectrometry and peptide microsequencing. Approximately 50 individual proteins were identified that could be assigned to five general categories: 1) proteins previously reported to localize to the accessory structures, e.g. ODF2 in the outer dense fibers, the sperm-specific glyceraldehyde-3-phosphate dehydrogenase in the fibrous sheath, and glutathione peroxidase in the mitochondrial sheath, validating this proteomic approach; 2) proteins that had not been shown to localize to any accessory structure but would be predicted to be present, e.g. glycolytic enzymes; 3) proteins known to be part of the flagellum but not localized to a specific site, e.g. adenylate kinase; 4) proteins not expected to be part of the accessory structures based on their previously reported locations, e.g. tektins; and 5) unknown proteins for which no information is available to make a determination as to location. The unexpected presence of the tektins in the accessory structures of the flagellum was confirmed by both immunoblot and immunofluorescence analysis. This proteomic analysis identified a number of unexpected and novel proteins in the accessory structures of the mammalian flagellum.
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Affiliation(s)
- Wenlei Cao
- Center for Research on Reproduction and Women's Health, University of Pennsylvania School of Medicine, Philadelphia, Pennsylvania 19104, USA
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36
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Abstract
To date, 21 knockout mouse models are known to bear specific anomalies of the sperm flagellum structures leading to motility disorders. In addition, genes responsible for flagellar defects of two well-known spontaneous mutant mice have recently been identified. These models reveal genetic factors, which are required for the proper assembly of the axoneme, the annulus, the mitochondrial sheath and the fibrous sheath. Many of these genetic factors follow unexpected cellular pathways to act on sperm flagellum morphogenesis. These mouse models may bear anomalies which are restricted to the spermatozoa or display more complex phenotypes that often include neuropathies and/or cilia-related diseases. In human, several structural disorders of the sperm flagellum found in brothers or consanguineous men probably have a genetic origin, but the genes involved have not yet been identified. The mutant mice we present in this review are invaluable models, which can be used to identify potential candidate genes for infertile men with specific sperm flagellum anomalies.
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Affiliation(s)
- Denise Escalier
- Andrology Department, University Paris XI, CHU Kremlin Bicêtre, France.
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37
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Yang C, Yang P. The flagellar motility of Chlamydomonas pf25 mutant lacking an AKAP-binding protein is overtly sensitive to medium conditions. Mol Biol Cell 2005; 17:227-38. [PMID: 16267272 PMCID: PMC1345661 DOI: 10.1091/mbc.e05-07-0630] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
Abstract
Radial spokes are a conserved axonemal structural complex postulated to regulate the motility of 9 + 2 cilia and flagella via a network of phosphoenzymes and regulatory proteins. Consistently, a Chlamydomonas radial spoke protein, RSP3, has been identified by RII overlays as an A-kinase anchoring protein (AKAP) that localizes the cAMP-dependent protein kinase (PKA) holoenzyme by binding to the RIIa domain of PKA RII subunit. However, the highly conserved docking domain of PKA is also found in the N termini of several AKAP-binding proteins unrelated to PKA as well as a 24-kDa novel spoke protein, RSP11. Here, we report that RSP11 binds to RSP3 directly in vitro and colocalizes with RSP3 toward the spoke base near outer doublets and dynein motors in axonemes. Importantly, RSP11 mutant pf25 displays a spectrum of motility, from paralysis with flaccid or twitching flagella as other spoke mutants to wildtype-like swimming. The wide range of motility changes reversibly depending on the condition of liquid media without replacing defective proteins. We postulate that radial spokes use the RIIa/AKAP module to regulate ciliary and flagellar beating; absence of the spoke RIIa protein exposes a medium-sensitive regulatory mechanism that is not obvious in wild-type Chlamydomonas.
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Affiliation(s)
- Chun Yang
- Department of Biological Sciences, Marquette University, Milwaukee WI 53233, USA
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38
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Verdier Y, Farré G, Rouet N, Kele Z, Janáky T, Boué F. Identification of a New, Testis-Specific Sperm Antigen Localized on the Principal Piece of the Spermatozoa Tail in the Fox (Vulpes vulpes)1. Biol Reprod 2005; 72:502-8. [PMID: 15509732 DOI: 10.1095/biolreprod.104.032623] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022] Open
Abstract
Fox (Vulpes vulpes) sperm antigens were identified to assess them as a potential target for a contraceptive vaccine. We report here the cloning and sequencing of fSP13, a fox sperm protein of 97 kDa. The fSP13 protein was both auto- and iso-antigenic in foxes; it was recognized by sera of foxes immunized with fox sperm proteins and vasectomized foxes. The NH2-terminal sequence of fSP13 was determined, and a piece of cDNA was amplified from testicular RNA by reverse transcription polymerase chain reaction. This piece was used to screen a cDNA library from fox testis by Southern blot. A sequence of 1662 base pairs was obtained, including a major open reading frame coding for 498 amino acid. Mass spectrometry analysis confirmed the position of the open reading frame and the presence of posttranscriptional modifications. Analysis of the predicted amino acid sequence revealed no apparent transmembrane regions. Comparison of the protein sequence with the Prosite database demonstrated the presence of four potential N-linked glycosylation sites. The fSP13 bears the closest amino acid similarity to two human sperm proteins: fibrousheathin 2 and testis-specific calcium binding protein 86-VII. The deduced 80 N-terminal amino acid sequence also presents similarity with the RIIalpha domain. By using a serum against fSP13, this antigen was localized on the principal piece of the fox spermatozoa. Northern blot analysis showed that fSP13 is specifically expressed in testis. The fSP13 is one of the first fox sperm antigens to be cloned and sequenced.
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Affiliation(s)
- Yann Verdier
- Agence Française de Sécurité Sanitaire des Aliments, Laboratoire d'études et de recherches sur la rage et la pathologie des animaux sauvages, Unit of Wildlife Health and Management, F-54220 Malzéville, France
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Alekseev OM, Widgren EE, Richardson RT, O'Rand MG. Association of NASP with HSP90 in mouse spermatogenic cells: stimulation of ATPase activity and transport of linker histones into nuclei. J Biol Chem 2004; 280:2904-11. [PMID: 15533935 DOI: 10.1074/jbc.m410397200] [Citation(s) in RCA: 53] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
NASP (nuclear autoantigenic sperm protein) is a linker histone-binding protein found in all dividing cells that is regulated by the cell cycle (Richardson, R. T., Batova, I. N., Widgren, E. E., Zheng, L. X., Whitfield, M., Marzluff, W. F., and O'Rand, M. G. (2000) J. Biol. Chem. 275, 30378-30386), and in the nucleus linker histones not bound to DNA are bound to NASP (Alekseev, O. M., Bencic, D. C., Richardson R. T., Widgren E. E., and O'Rand, M. G. (2003) J. Biol. Chem. 278, 8846-8852). In mouse spermatogenic cells tNASP binds the testis-specific linker histone H1t. Utilizing a cross-linker, 3,3'-dithiobissulfosuccinimidyl propionate, and mass spectrometry, we have identified HSP90 as a testis/embryo form of NASP (tNASP)-binding partner. In vitro assays demonstrate that the association of tNASP with HSP90 stimulated the ATPase activity of HSP90 and increased the binding of H1t to tNASP. HSP90 and tNASP are present in both nuclear and cytoplasmic fractions of mouse spermatogenic cells; however, HSP90 bound to NASP only in the cytoplasm. In vitro nuclear import assays on permeabilized HeLa cells demonstrate that tNASP, in the absence of any other cytoplasmic factors, transports linker histones into the nucleus in an energy and nuclear localization signal-dependent manner. Consequently we hypothesize that in the cytoplasm linker histones are bound to a complex containing NASP and HSP90 whose ATPase activity is stimulated by binding NASP. NASP-H1 is subsequently released from the complex and translocates to the nucleus where the H1 is released for binding to the DNA.
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Affiliation(s)
- Oleg M Alekseev
- Department of Cell and Developmental Biology, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599-7090
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