101
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Mohamed HM, Mohamed MAH. Effect of different doses of nandrolone decanoate on lipid peroxidation, DNA fragmentation, sperm abnormality and histopathology of testes of male Wister rats. ACTA ACUST UNITED AC 2014; 67:1-11. [PMID: 25440442 DOI: 10.1016/j.etp.2014.09.003] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2014] [Revised: 07/28/2014] [Accepted: 09/08/2014] [Indexed: 01/17/2023]
Abstract
The present study aims of to investigate the effects of low and high doses of nandrolone decanoate (ND) on histopathology and apoptosis of the spermatogenic cells as well as lipid peroxidation, antioxidant enzyme activities, sperm abnormality and DNA fragmentation. Eighteen animals were divided into three groups each group contain six animals. The rats were divided into three groups as following: Group 1 was administered saline (control). Group 2, received nandrolone decanoate (3 mg/kg/weekly) (low dose) with intramuscular injection. Group 3, received intramuscular injection dose of nandrolone decanoate (10 mg/kg/weekly) (high dose). After 8 weeks, caspase-3 assay was used to determine the apoptotic cells. The sperm parameters, lipid peroxidation, antioxidant enzyme activities and testosterone concentration were also investigated in the experimental groups of both low and high dose compared to the control groups. Treated group with high dose showed degenerated germinal epithelial cells sloughed in the lumina of seminiferous tubules, where almost seminiferous tubules were devoid of spermatids and spermatozoa compared to control and group treated with low dose. Also, a significant increase of lipid peroxidation levels and heat shock proteins was observed in two groups administrated with two different doses of ND while, antioxidant enzyme activities, and testosterone concentration was significantly decreased in two treated group when compared with control. Administration of ND at high and low doses leads to deteriorated sperm parameters, DNA fragmentation and testicular apoptosis. In conclusion, the administration ND at high doses more effective on lipid peroxidation, antioxidant enzyme activities, sperm abnormality, histopathology, apoptotic and DNA changes compared to low dose group and to control group.
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Affiliation(s)
- Hanaa Mahmoud Mohamed
- Department of Zoology, Faculty of Science, Beni-Suef University, Salah Salem Street, Beni-Suef 62511, Egypt
| | - Manal Abdul-Hamid Mohamed
- Department of Zoology, Faculty of Science, Beni-Suef University, Salah Salem Street, Beni-Suef 62511, Egypt.
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102
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Chaffee BR, Shang F, Chang ML, Clement TM, Eddy EM, Wagner BD, Nakahara M, Nagata S, Robinson ML, Taylor A. Nuclear removal during terminal lens fiber cell differentiation requires CDK1 activity: appropriating mitosis-related nuclear disassembly. Development 2014; 141:3388-98. [PMID: 25139855 DOI: 10.1242/dev.106005] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Lens epithelial cells and early lens fiber cells contain the typical complement of intracellular organelles. However, as lens fiber cells mature they must destroy their organelles, including nuclei, in a process that has remained enigmatic for over a century, but which is crucial for the formation of the organelle-free zone in the center of the lens that assures clarity and function to transmit light. Nuclear degradation in lens fiber cells requires the nuclease DNase IIβ (DLAD) but the mechanism by which DLAD gains access to nuclear DNA remains unknown. In eukaryotic cells, cyclin-dependent kinase 1 (CDK1), in combination with either activator cyclins A or B, stimulates mitotic entry, in part, by phosphorylating the nuclear lamin proteins leading to the disassembly of the nuclear lamina and subsequent nuclear envelope breakdown. Although most post-mitotic cells lack CDK1 and cyclins, lens fiber cells maintain these proteins. Here, we show that loss of CDK1 from the lens inhibited the phosphorylation of nuclear lamins A and C, prevented the entry of DLAD into the nucleus, and resulted in abnormal retention of nuclei. In the presence of CDK1, a single focus of the phosphonuclear mitotic apparatus is observed, but it is not focused in CDK1-deficient lenses. CDK1 deficiency inhibited mitosis, but did not prevent DNA replication, resulting in an overall reduction of lens epithelial cells, with the remaining cells possessing an abnormally large nucleus. These observations suggest that CDK1-dependent phosphorylations required for the initiation of nuclear membrane disassembly during mitosis are adapted for removal of nuclei during fiber cell differentiation.
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Affiliation(s)
- Blake R Chaffee
- Department of Biology, Miami University, Oxford, OH 45056, USA
| | - Fu Shang
- Laboratory for Nutrition and Vision Research, Human Nutrition Research Center on Aging, Nutrition &Vision Res-USDA-HNRCA, Tufts University, Boston 02111, MA, USA
| | - Min-Lee Chang
- Laboratory for Nutrition and Vision Research, Human Nutrition Research Center on Aging, Nutrition &Vision Res-USDA-HNRCA, Tufts University, Boston 02111, MA, USA
| | - Tracy M Clement
- National Institute of Environmental Health Sciences, NIH, Research Triangle Park, NC 27709, USA
| | - Edward M Eddy
- National Institute of Environmental Health Sciences, NIH, Research Triangle Park, NC 27709, USA
| | - Brad D Wagner
- Department of Biology, Miami University, Oxford, OH 45056, USA
| | - Masaki Nakahara
- Department of Molecular and Cellular Physiology, Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | - Shigekazu Nagata
- Department of Medical Chemistry, Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | | | - Allen Taylor
- Laboratory for Nutrition and Vision Research, Human Nutrition Research Center on Aging, Nutrition &Vision Res-USDA-HNRCA, Tufts University, Boston 02111, MA, USA Department of Biological Chemistry, Weizmann Institute of Science, Rehovot, Israel
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103
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Depression of HspA2 in human testis is associated with spermatogenic impairment and fertilization rate in ICSI treatment for azoospermic individuals. J Assist Reprod Genet 2014; 31:1687-93. [PMID: 25308252 DOI: 10.1007/s10815-014-0360-7] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2014] [Accepted: 09/28/2014] [Indexed: 10/24/2022] Open
Abstract
PURPOSE Heat shock protein A2 (HspA2) expression was quantitatively measured in human testis and its relationship with the spermatogenetic status and laboratory outcomes of intracytoplasmic sperm injection (ICSI) was investigated. METHODS Testicular tissues of azoospermia men were divided into four groups according to histopahtology: normal spermatogenesiss, hypospermatogenesis, maturation arrest and Sertoli cell-only syndrome (SCOS). HspA2 immunostaining was measured by Image Pro-Plus (IPP) and laboratory outcomes were calculated. The regression analysis between HspA2 expression and Johnsen score of as well as fertilization, cleavage and high quality embryo rate was performed. RESULTS HspA2 was strongly present in the cytoplasm of spermatocytes and spermatides in normal testis. However, hypospermatogenesis and maturation arrest testicular tissues demonstrated light staining and no staining for SCOS. Quantitative image analysis showed that there were significant differences among groups (P = 0.000 & P = 0.001). HspA2 exspression was founded significantly correlated spermatogenetic status (R(2) = 0.726, P = 0.000) as well as fertilization rate in ICSI (R(2) = 0.569, P = 0.000). CONCLUSIONS The fertilization rate with ICSI is associated with HspA2 expression in the testis from which sperm retrieved and the alteration of HspA2 expression has been involved in spermatogenic impairment.
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104
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Amaral A, Paiva C, Attardo Parrinello C, Estanyol JM, Ballescà JL, Ramalho-Santos J, Oliva R. Identification of proteins involved in human sperm motility using high-throughput differential proteomics. J Proteome Res 2014; 13:5670-84. [PMID: 25250979 DOI: 10.1021/pr500652y] [Citation(s) in RCA: 114] [Impact Index Per Article: 11.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Mammalian sperm motility is a prerequisite for in vivo fertilization, and alterations in this parameter are commonly observed in infertile males. However, we still do not have a complete understanding of the molecular mechanisms controlling it. The aim of this study was to identify proteins involved in human sperm motility deficiency by using TMT protein labeling and LC-MS/MS. Two complementary approaches were used: comparison between sperm samples differing in motility (asthenozoospermic versus normozoospermic) and comparison between sperm subpopulations of fractionated normozoospermic samples differing in motility (non-migrated versus migrated). LC-MS/MS resulted in the identification of 1157 and 887 proteins in the first and second approaches, respectively. Remarkably, similar proteomic alterations were detected in the two experiments, with 80 proteins differentially expressed in the two groups of samples and 93 differentially expressed in the two groups of subpopulations. The differential proteins were analyzed by GO, cellular pathways, and clustering analyses and resulted in the identification of core deregulated proteins and pathways associated with sperm motility dysfunction. These included proteins associated with energetic metabolism, protein folding/degradation, vesicle trafficking, and the cytoskeleton. Contrary to what is usually accepted, the outcomes support the hypothesis that several metabolic pathways (notably, mitochondrial-related ones) contribute toward regulating sperm motility.
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Affiliation(s)
- Alexandra Amaral
- Human Genetics Research Group, Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), Faculty of Medicine, University of Barcelona , Casanova 143, 08036 Barcelona, Spain
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105
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Mokánszki A, Tóthné EV, Bodnár B, Tándor Z, Molnár Z, Jakab A, Ujfalusi A, Oláh É. Is sperm hyaluronic acid binding ability predictive for clinical success of intracytoplasmic sperm injection: PICSI vs. ICSI? Syst Biol Reprod Med 2014; 60:348-54. [DOI: 10.3109/19396368.2014.948102] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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106
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Expression of HSPA2 in human hepatocellular carcinoma and its clinical significance. Tumour Biol 2014; 35:11283-7. [DOI: 10.1007/s13277-014-2430-y] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2014] [Accepted: 07/31/2014] [Indexed: 10/24/2022] Open
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107
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Rogon C, Ulbricht A, Hesse M, Alberti S, Vijayaraj P, Best D, Adams IR, Magin TM, Fleischmann BK, Höhfeld J. HSP70-binding protein HSPBP1 regulates chaperone expression at a posttranslational level and is essential for spermatogenesis. Mol Biol Cell 2014; 25:2260-71. [PMID: 24899640 PMCID: PMC4116300 DOI: 10.1091/mbc.e14-02-0742] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2014] [Revised: 05/12/2014] [Accepted: 05/23/2014] [Indexed: 11/11/2022] Open
Abstract
Molecular chaperones play key roles during growth, development, and stress survival. The ability to induce chaperone expression enables cells to cope with the accumulation of nonnative proteins under stress and complete developmental processes with an increased requirement for chaperone assistance. Here we generate and analyze transgenic mice that lack the cochaperone HSPBP1, a nucleotide-exchange factor of HSP70 proteins and inhibitor of chaperone-assisted protein degradation. Male HSPBP1(-/-) mice are sterile because of impaired meiosis and massive apoptosis of spermatocytes. HSPBP1 deficiency in testes strongly reduces the expression of the inducible, antiapoptotic HSP70 family members HSPA1L and HSPA2, the latter of which is essential for synaptonemal complex disassembly during meiosis. We demonstrate that HSPBP1 affects chaperone expression at a posttranslational level by inhibiting the ubiquitylation and proteasomal degradation of inducible HSP70 proteins. We further provide evidence that the cochaperone BAG2 contributes to HSP70 stabilization in tissues other than testes. Our findings reveal that chaperone expression is determined not only by regulated transcription, but also by controlled degradation, with degradation-inhibiting cochaperones exerting essential prosurvival functions.
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Affiliation(s)
- Christian Rogon
- Institut für Zellbiologie and Bonner Forum Biomedizin, Rheinische Friedrich-Wilhelms-Universität Bonn, D-53121 Bonn, Germany
| | - Anna Ulbricht
- Institut für Zellbiologie and Bonner Forum Biomedizin, Rheinische Friedrich-Wilhelms-Universität Bonn, D-53121 Bonn, Germany
| | - Michael Hesse
- Institut für Physiologie I, Life and Brain Centre, Rheinische Friedrich-Wilhelms-Universität Bonn, D-53105 Bonn, Germany
| | - Simon Alberti
- Institut für Zellbiologie and Bonner Forum Biomedizin, Rheinische Friedrich-Wilhelms-Universität Bonn, D-53121 Bonn, Germany
| | - Preethi Vijayaraj
- Abteilung für Zellbiochemie, Institut für Biochemie und Molekularbiologie, Rheinische Friedrich-Wilhelms-Universität Bonn, D-53115 Bonn, Germany
| | - Diana Best
- MRC Human Genetics Unit, MRC Institute of Genetics and Molecular Medicine, University of Edinburgh, Western General Hospital, Edinburgh EH4 2XU, United Kingdom
| | - Ian R Adams
- MRC Human Genetics Unit, MRC Institute of Genetics and Molecular Medicine, University of Edinburgh, Western General Hospital, Edinburgh EH4 2XU, United Kingdom
| | - Thomas M Magin
- Abteilung für Zellbiochemie, Institut für Biochemie und Molekularbiologie, Rheinische Friedrich-Wilhelms-Universität Bonn, D-53115 Bonn, Germany
| | - Bernd K Fleischmann
- Institut für Physiologie I, Life and Brain Centre, Rheinische Friedrich-Wilhelms-Universität Bonn, D-53105 Bonn, Germany
| | - Jörg Höhfeld
- Institut für Zellbiologie and Bonner Forum Biomedizin, Rheinische Friedrich-Wilhelms-Universität Bonn, D-53121 Bonn, Germany
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108
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Zheng BB, Fang YN, Pan ZY, Sun L, Deng XX, Grosser JW, Guo WW. iTRAQ-based quantitative proteomics analysis revealed alterations of carbohydrate metabolism pathways and mitochondrial proteins in a male sterile cybrid pummelo. J Proteome Res 2014; 13:2998-3015. [PMID: 24824475 DOI: 10.1021/pr500126g] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Comprehensive and quantitative proteomic information on citrus floral bud is significant for understanding male sterility of the cybrid pummelo (G1+HBP) with nuclear genome of HBP and foreign mitochondrial genome of G1. Scanning electron microscopy and transmission electron microscopy analyses of the anthers showed that the development of pollen wall in G1+HBP was severely defective with a lack of exine and sporopollenin formation. Proteomic analysis was used to identify the differentially expressed proteins between male sterile G1+HBP and fertile type (HBP) with the aim to clarify their potential roles in anther development and male sterility. On the basis of iTRAQ quantitative proteomics, we identified 2235 high-confidence protein groups, 666 of which showed differentially expressed profiles in one or more stages. Proteins up- or down-regulated in G1+HBP were mainly involved in carbohydrate and energy metabolism (e.g., pyruvate dehydrogenase, isocitrate dehydrogenase, ATP synthase, and malate dehydrogenase), nucleotide binding (RNA-binding proteins), protein synthesis and degradation (e.g., ribosome proteins and proteasome subunits). Additionally, the proteins located in mitochondria also showed changed expression patterns. These findings provide a valuable inventory of proteins involved in floral bud development and contribute to elucidate the mechanism of cytoplasmic male sterility in the cybrid pummelo.
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Affiliation(s)
- Bei-Bei Zheng
- Key Laboratory of Horticultural Plant Biology (Ministry of Education), Huazhong Agricultural University , Wuhan 430070, China
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109
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Novel SNPs in heat shock protein 70 gene and their association with sperm quality traits of Boer goats and Boer crosses. Anim Reprod Sci 2014; 146:176-81. [DOI: 10.1016/j.anireprosci.2014.03.001] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2013] [Revised: 01/25/2014] [Accepted: 03/02/2014] [Indexed: 11/18/2022]
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110
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Wang X, Chen M, Zhou J, Zhang X. HSP27, 70 and 90, anti-apoptotic proteins, in clinical cancer therapy (Review). Int J Oncol 2014; 45:18-30. [PMID: 24789222 DOI: 10.3892/ijo.2014.2399] [Citation(s) in RCA: 199] [Impact Index Per Article: 19.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2013] [Accepted: 02/27/2014] [Indexed: 12/16/2022] Open
Abstract
Among the heat shock proteins (HSP), HSP27, HSP70 and HSP90 are the most studied stress-inducible HSPs, and are induced in response to a wide variety of physiological and environmental insults, thus allowing cells to survive to lethal conditions based on their powerful cytoprotective functions. Different functions of HSPs have been described to explain their cytoprotective functions, including their most basic role as molecular chaperones, that is to regulate protein folding, transport, translocation and assembly, especially helping in the refolding of misfolded proteins, as well as their anti-apoptotic properties. In cancer cells, the expression and/or activity of the three HSPs is abnormally high, and is associated with increased tumorigenicity, metastatic potential of cancer cells and resistance to chemotherapy. Associating with key apoptotic factors, they are powerful anti-apoptotic proteins, having the capacity to block the cell death process at different levels. Altogether, the properties suggest that HSP27, HSP70 and HSP90 are appropriate targets for modulating cell death pathways. In this review, we summarize the role of HSP90, HSP70 and HSP27 in apoptosis and the emerging strategies that have been developed for cancer therapy based on the inhibition of the three HSPs.
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Affiliation(s)
- Xiaoxia Wang
- College of Basic Medicine, Nanjing University of Chinese Medicine, Nanjing 210046, P.R. China
| | - Meijuan Chen
- College of Basic Medicine, Nanjing University of Chinese Medicine, Nanjing 210046, P.R. China
| | - Jing Zhou
- College of Basic Medicine, Nanjing University of Chinese Medicine, Nanjing 210046, P.R. China
| | - Xu Zhang
- College of Basic Medicine, Nanjing University of Chinese Medicine, Nanjing 210046, P.R. China
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111
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MacLeod G, Taylor P, Mastropaolo L, Varmuza S. Comparative phosphoproteomic analysis of the mouse testis reveals changes in phosphopeptide abundance in response to Ppp1cc deletion. EUPA OPEN PROTEOMICS 2014. [DOI: 10.1016/j.euprot.2013.11.009] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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112
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Rathke C, Baarends WM, Awe S, Renkawitz-Pohl R. Chromatin dynamics during spermiogenesis. BIOCHIMICA ET BIOPHYSICA ACTA-GENE REGULATORY MECHANISMS 2014; 1839:155-68. [DOI: 10.1016/j.bbagrm.2013.08.004] [Citation(s) in RCA: 339] [Impact Index Per Article: 33.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/03/2013] [Revised: 08/06/2013] [Accepted: 08/09/2013] [Indexed: 01/25/2023]
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113
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Liu M, Shi X, Bi Y, Qi L, Guo X, Wang L, Zhou Z, Sha J. SHCBP1L, a conserved protein in mammals, is predominantly expressed in male germ cells and maintains spindle stability during meiosis in testis. Mol Hum Reprod 2014; 20:463-75. [PMID: 24557841 DOI: 10.1093/molehr/gau014] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
Male subfertility due to falling sperm counts has become an increasing problem over a short timescale (50-70 years). Recently, bioinformatics analysis of the human testis proteome has revealed the existence of human-testicular-predominantly-expressed-proteins, which are highly associated with spermatogenesis, although the functions of many of these proteins are still unknown. To understand the function of one of these proteins, SHCBP1L (1700012A16RIKEN), a knockout mouse was produced in which this gene was removed. Using this model, we showed that SHCBP1L binds to another protein, HSPA2, and maintains stability of the spindle. We showed that this complex was not present in knockout mice and that an abnormal number of spermatocytes were held in the early stages of meiosis. Many of these cells were undergoing programmed cell-death, or apoptosis, which is highly unusual for cells during the early stages of meiosis. We also found that proteins very similar to SHCBP1L exist in many other mammals. This led us to propose that SHCBP1L plays an important role in spermatogenesis in mammals.
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Affiliation(s)
- Mingxi Liu
- State Key Laboratory of Reproductive Medicine, Nanjing Medical University, Nanjing 210029, Jiangsu, China
| | - Xiaodan Shi
- State Key Laboratory of Reproductive Medicine, Nanjing Medical University, Nanjing 210029, Jiangsu, China
| | - Ye Bi
- State Key Laboratory of Reproductive Medicine, Nanjing Medical University, Nanjing 210029, Jiangsu, China
| | - Lin Qi
- State Key Laboratory of Reproductive Medicine, Nanjing Medical University, Nanjing 210029, Jiangsu, China
| | - Xuejiang Guo
- State Key Laboratory of Reproductive Medicine, Nanjing Medical University, Nanjing 210029, Jiangsu, China
| | - Lei Wang
- State Key Laboratory of Reproductive Medicine, Nanjing Medical University, Nanjing 210029, Jiangsu, China
| | - Zuomin Zhou
- State Key Laboratory of Reproductive Medicine, Nanjing Medical University, Nanjing 210029, Jiangsu, China
| | - Jiahao Sha
- State Key Laboratory of Reproductive Medicine, Nanjing Medical University, Nanjing 210029, Jiangsu, China
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114
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Jagan Mohanarao G, Mukherjee A, Banerjee D, Gohain M, Dass G, Brahma B, Datta TK, Upadhyay RC, De S. HSP70 family genes and HSP27 expression in response to heat and cold stress in vitro in peripheral blood mononuclear cells of goat (Capra hircus). Small Rumin Res 2014. [DOI: 10.1016/j.smallrumres.2013.10.014] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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115
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Baker MA, Aitken RJ. Proteomic insights into spermatozoa: critiques, comments and concerns. Expert Rev Proteomics 2014; 6:691-705. [DOI: 10.1586/epr.09.76] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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116
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Gallardo M, Barrio S, Fernandez M, Paradela A, Arenas A, Toldos O, Ayala R, Albizua E, Jimenez A, Redondo S, Garcia-Martin RM, Gilsanz F, Albar JP, Martinez-Lopez J. Proteomic analysis reveals heat shock protein 70 has a key role in polycythemia Vera. Mol Cancer 2013; 12:142. [PMID: 24252366 PMCID: PMC4225507 DOI: 10.1186/1476-4598-12-142] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2013] [Accepted: 11/15/2013] [Indexed: 01/07/2023] Open
Abstract
JAK-STAT signaling through the JAK2V617F mutation is central to the pathogenesis of myeloproliferative neoplasms (MPN). However, other events could precede the JAK2 mutation. The aim of this study is to analyze the phenotypic divergence between polycytemia vera (PV) and essential thrombocytemia (ET) to find novel therapeutics targets by a proteomic and functional approach to identify alternative routes to JAK2 activation. Through 2D-DIGE and mass spectrometry of granulocyte protein from 20 MPN samples, showed differential expression of HSP70 in PV and ET besides other 60 proteins. Immunohistochemistry of 46 MPN bone marrow samples confirmed HSP70 expression. The median of positive granulocytes was 80% in PV (SD 35%) vs. 23% in ET (SD 34.25%). In an ex vivo model KNK437 was used as an inhibition model assay of HSP70, showed dose-dependent inhibition of cell growth and burst formation unit erythroid (BFU-E) in PV and ET, increased apoptosis in the erythroid lineage, and decreased pJAK2 signaling, as well as a specific siRNA for HSP70. These data suggest a key role for HSP70 in proliferation and survival of the erythroid lineage in PV, and may represent a potential therapeutic target in MPN, especially in PV.
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Affiliation(s)
- Miguel Gallardo
- Hematology Service, Hospital Universitario 12 de Octubre, Avenida, Córdoba, s/n, 28041, Madrid, Spain.
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Jockusch H, Holland A, Staunton L, Schmitt-John T, Heimann P, Dowling P, Ohlendieck K. Pathoproteomics of testicular tissue deficient in the GARP component VPS54: The wobbler mouse model of globozoospermia. Proteomics 2013; 14:839-52. [DOI: 10.1002/pmic.201300189] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2013] [Revised: 08/12/2013] [Accepted: 09/10/2013] [Indexed: 01/18/2023]
Affiliation(s)
- Harald Jockusch
- Department of Developmental Biology and Molecular Pathology; University of Bielefeld; Bielefeld Germany
| | - Ashling Holland
- Department of Biology; National University of Ireland; Maynooth Ireland
| | - Lisa Staunton
- Department of Biology; National University of Ireland; Maynooth Ireland
| | - Thomas Schmitt-John
- Department of Molecular Biology and Genetics; Aarhus University; Aarhus Denmark
| | - Peter Heimann
- Department of Cell Biology; University of Bielefeld; Bielefeld Germany
| | - Paul Dowling
- National Institute for Cellular Biotechnology; Dublin City University; Dublin Ireland
| | - Kay Ohlendieck
- Department of Biology; National University of Ireland; Maynooth Ireland
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118
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Gonzales GF, Vasquez VB, Gasco M. The transillumination technique as a method for the assessment of spermatogenesis using medicinal plants: the effect of extracts of black maca (Lepidium meyenii) and camu camu (Myrciaria dubia) on stages of the spermatogenic cycle in male rats. Toxicol Mech Methods 2013; 23:559-65. [DOI: 10.3109/15376516.2013.802830] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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119
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Abe A, Takahashi-Niki K, Takekoshi Y, Shimizu T, Kitaura H, Maita H, Iguchi-Ariga SMM, Ariga H. Prefoldin plays a role as a clearance factor in preventing proteasome inhibitor-induced protein aggregation. J Biol Chem 2013; 288:27764-76. [PMID: 23946485 DOI: 10.1074/jbc.m113.476358] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
Prefoldin is a molecular chaperone composed of six subunits, PFD1-6, and prevents misfolding of newly synthesized nascent polypeptides. Although it is predicted that prefoldin, like other chaperones, modulates protein aggregation, the precise function of prefoldin against protein aggregation under physiological conditions has never been elucidated. In this study, we first established an anti-prefoldin monoclonal antibody that recognizes the prefoldin complex but not its subunits. Using this antibody, it was found that prefoldin was localized in the cytoplasm with dots in co-localization with polyubiquitinated proteins and that the number and strength of dots were increased in cells that had been treated with lactacystin, a proteasome inhibitor, and thapsigargin, an inducer of endoplasmic reticulum stress. Knockdown of prefoldin increased the level of SDS-insoluble ubiquitinated protein and reduced cell viability in lactacystin and thapsigargin-treated cells. Opposite results were obtained in prefoldin-overexpressed cells. It has been reported that mice harboring a missense mutation L110R of MM-1α/PFD5 exhibit neurodegeneration in the cerebellum. Although the prefoldin complex containing L110R MM-1α was properly formed in vitro and in cells derived from L110R MM-1α mice, the levels of ubiquitinated proteins and cytotoxicity were higher in L110R MM-1α cells than in wild-type cells under normal conditions and were increased by lactacystin and thapsigargin treatment, and growth of L110R MM-1α cells was attenuated. Furthermore, the polyubiquitinated protein aggregation level was increased in the brains of L110R MM-1α mice. These results suggest that prefoldin plays a role in quality control against protein aggregation and that dysfunction of prefoldin is one of the causes of neurodegenerative diseases.
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Affiliation(s)
- Akira Abe
- From the Graduate School of Pharmaceutical Sciences, Hokkaido University, Kita-ku, Sapporo 060-0812 and
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Kim B, Park K, Rhee K. Heat stress response of male germ cells. Cell Mol Life Sci 2013; 70:2623-36. [PMID: 23007846 PMCID: PMC11113252 DOI: 10.1007/s00018-012-1165-4] [Citation(s) in RCA: 95] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2012] [Revised: 08/19/2012] [Accepted: 09/10/2012] [Indexed: 01/09/2023]
Abstract
The vast majority of mammalian testes are located outside the body cavity for proper thermoregulation. Heat has an adverse effect on mammalian spermatogenesis and eventually leads to sub- or infertility. Recent studies have provided insights into the molecular response of male germ cells to high temperatures. Here, we review the effects of heat on male germ cells and discuss the mechanisms underlying germ cell loss and impairment. We also discuss the role of translational control in male germ cells as a potential protective mechanism against heat-induced germ cell apoptosis.
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Affiliation(s)
- Byunghyuk Kim
- Department of Biological Sciences, Seoul National University, Seoul, 151-747 Korea
| | - Kyosun Park
- Department of Biological Sciences, Seoul National University, Seoul, 151-747 Korea
| | - Kunsoo Rhee
- Department of Biological Sciences, Seoul National University, Seoul, 151-747 Korea
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121
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May LA, Kramarenko II, Brandon CS, Voelkel-Johnson C, Roy S, Truong K, Francis SP, Monzack EL, Lee FS, Cunningham LL. Inner ear supporting cells protect hair cells by secreting HSP70. J Clin Invest 2013; 123:3577-87. [PMID: 23863716 DOI: 10.1172/jci68480] [Citation(s) in RCA: 81] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2012] [Accepted: 05/03/2013] [Indexed: 02/02/2023] Open
Abstract
Mechanosensory hair cells are the receptor cells of hearing and balance. Hair cells are sensitive to death from exposure to therapeutic drugs with ototoxic side effects, including aminoglycoside antibiotics and cisplatin. We recently showed that the induction of heat shock protein 70 (HSP70) inhibits ototoxic drug-induced hair cell death. Here, we examined the mechanisms underlying the protective effect of HSP70. In response to heat shock, HSP70 was induced in glia-like supporting cells but not in hair cells. Adenovirus-mediated infection of supporting cells with Hsp70 inhibited hair cell death. Coculture with heat-shocked utricles protected nonheat-shocked utricles against hair cell death. When heat-shocked utricles from Hsp70-/- mice were used in cocultures, protection was abolished in both the heat-shocked utricles and the nonheat-shocked utricles. HSP70 was detected by ELISA in the media surrounding heat-shocked utricles, and depletion of HSP70 from the media abolished the protective effect of heat shock, suggesting that HSP70 is secreted by supporting cells. Together our data indicate that supporting cells mediate the protective effect of HSP70 against hair cell death, and they suggest a major role for supporting cells in determining the fate of hair cells exposed to stress.
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Affiliation(s)
- Lindsey A May
- National Institute on Deafness and Other Communication Disorders, NIH, Rockville, Maryland 20850, USA
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122
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Zhang H, Chen W, Duan CJ, Zhang CF. Overexpression of HSPA2 is correlated with poor prognosis in esophageal squamous cell carcinoma. World J Surg Oncol 2013; 11:141. [PMID: 23777267 PMCID: PMC3698197 DOI: 10.1186/1477-7819-11-141] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2013] [Accepted: 06/02/2013] [Indexed: 12/30/2022] Open
Abstract
Background Heat shock-related 70 kDa protein 2 (HSPA2) has been identified as a potential cancer-promoting protein expressed at abnormal levels in a subset of cancers. However, its important role in esophageal squamous cell carcinoma (ESCC) is hardly known by people. The purpose of this study is to assess HSPA2 expression and to explore its role in ESCC. Methods Thirty ESCC samples, paired adjacent non-cancerous tissues and normal esophageal tissues, were collected for HSPA2 detection by quantitative RT-PCR (qRT-PCR) and western blotting. Additionally, the expression of HSPA2 in ESCC and adjacent non-cancerous tissues from 120 patients was analyzed by immunohistochemistry, and correlated with clinicopathological parameters and patients’ outcome. Results HSPA2 mRNA and protein were overexpressed in ESCC tissues. Overexpression of HSPA2 was significantly associated with primary tumor, TNM stage, lymph node metastases and recurrence, respectively (all, P <0.05). Kaplan-Meier curves showed that elevated HSPA2 expression was associated with shorter disease-free survival and overall survival in ESCC patients. Cox multivariate regression analysis revealed that overexpression of HSPA2 was an independent prognostic factor in disease-free survival and overall survival for ESCC patients (hazard ratio was 2.115 and 2.210, respectively, P <0.05). Conclusions Our findings demonstrate that overexpression of HSPA2 may contribute to the malignant progression of ESCC and present a novel prognostic indicator for ESCC patients.
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Affiliation(s)
- Hang Zhang
- Department of Cardiothoracic Surgery, Xiangya Hospital, Central South University, Xiangya Road 87, Changsha, Hunan Province 410008, People's Republic of China
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123
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He Y, Luo M, Yi M, Sheng Y, Cheng Y, Zhou R, Cheng H. Identification of a testis-enriched heat shock protein and fourteen members of Hsp70 family in the swamp eel. PLoS One 2013; 8:e65269. [PMID: 23750249 PMCID: PMC3672149 DOI: 10.1371/journal.pone.0065269] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2013] [Accepted: 04/23/2013] [Indexed: 12/18/2022] Open
Abstract
Background Gonad differentiation is one of the most important developmental events in vertebrates. Some heat shock proteins are associated with gonad development. Heat shock protein 70 (Hsp70) in the teleost fish and its roles in sex differentiation are poorly understood. Methods and Findings We have identified a testis-enriched heat shock protein Hspa8b2 in the swamp eel using Western blot analysis and Mass Spectrometry (MS). Fourteen Hsp70 family genes were further identified in this species based on transcriptome information. The phylogenetic tree of Hsp70 family was constructed using the Maximum Likelihood method and their expression patterns in the swamp eel gonads were analyzed by reverse transcription-polymerase chain reaction (RT-PCR). Conclusion There are fourteen gene members in the Hsp70 family in the swamp eel genome. Hsp70 family, particularly Hspa8, has expanded in the species. One of the family members Hspa8b2 is predominantly expressed in testis of the swamp eel.
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Affiliation(s)
- Yan He
- College of Fisheries, Huazhong Agricultural University, Wuhan, PR China
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124
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Peng Z, Liu N, Huang D, Duan C, Li Y, Tang X, Mei W, Zhu F, Tang F. N,N'-dinitrosopiperazine--mediated heat-shock protein 70-2 expression is involved in metastasis of nasopharyngeal carcinoma. PLoS One 2013; 8:e62908. [PMID: 23667540 PMCID: PMC3647053 DOI: 10.1371/journal.pone.0062908] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2013] [Accepted: 03/26/2013] [Indexed: 01/06/2023] Open
Abstract
N,N′-Dinitrosopiperazine (DNP) is invovled in nasopharyngeal carcinoma (NPC) development and metastasis, and it shows organ specificity to the nasopharyngeal epithelium. Herein, we demonstrate that DNP induces heat-shock protein (HSP) 70-2 expression in NPC cells (6-10B) at a non-cytotoxic concentration. DNP induced HSP70-2 expression in a dose- and time- dependent manner, but showed no effect on other HSP70 family members. Furthermore, DNP also increased HSP70-2 RNA transcription through directly binding to the hypoxia-responsive elements (HRE) and heat shock elements (HSE) located in the HSP70-2 promoter. DNP-mediated HSP70-2 expression might act through enhancing the transcription of HSP70-2 RNA. Importantly, DNP induced motility and invasion of 6-10B cells dose- and time-dependently, and DNP-mediated NPC metastasis was confirmed in nude mice, which showed high HSP70-2 expression in the metastatic tumor tissue. However, the motility and invasion of NPC cells that were stably transfected using short interfering RNA against HSP70-2 could not effectively induce DNP. These results indicate that DNP induces HSP70-2 expression through increasing HSP70-2 transcription, increases the motility and invasion of cells, and promotes NPC tumor metastasis. Therefore, DNP mediated HSP70-2 expression may be an important factor of NPC-high metastasis.
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Affiliation(s)
- Zhengke Peng
- Medical Research Center and Clinical Laboratory, Zhuhai Hospital, Jinan University, Zhuhai People’s Hospital, Zhuhai, People’s Republic of China
| | - Na Liu
- Medical Research Center and Clinical Laboratory, Xiangya Hospital, Central South University, Changsha, People’s Republic of China
| | - Damao Huang
- Medical Research Center and Clinical Laboratory, Xiangya Hospital, Central South University, Changsha, People’s Republic of China
| | - Chaojun Duan
- Medical Research Center and Clinical Laboratory, Xiangya Hospital, Central South University, Changsha, People’s Republic of China
| | - Yuejin Li
- Medical Research Center and Clinical Laboratory, Zhuhai Hospital, Jinan University, Zhuhai People’s Hospital, Zhuhai, People’s Republic of China
| | - Xiaowei Tang
- Metallurgical Science and Engineering, Central South University, Changsha, People’s Republic of China
| | - Wenhua Mei
- Medical Research Center and Clinical Laboratory, Zhuhai Hospital, Jinan University, Zhuhai People’s Hospital, Zhuhai, People’s Republic of China
| | - Feng Zhu
- Hormel Institute, University of Minnesota, Austin, Minnesota, United States of America
| | - Faqing Tang
- Medical Research Center and Clinical Laboratory, Zhuhai Hospital, Jinan University, Zhuhai People’s Hospital, Zhuhai, People’s Republic of China
- Medical Research Center and Clinical Laboratory, Xiangya Hospital, Central South University, Changsha, People’s Republic of China
- * E-mail:
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125
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Zaprjanova S, Rashev P, Zasheva D, Martinova Y, Mollova M. Electrophoretic and immunocytochemical analysis of Hsp72 and Hsp73 expression in heat-stressed mouse testis and epididymis. Eur J Obstet Gynecol Reprod Biol 2013; 168:54-9. [DOI: 10.1016/j.ejogrb.2012.12.021] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2011] [Revised: 09/12/2012] [Accepted: 12/23/2012] [Indexed: 11/28/2022]
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126
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Chang A, Zhang Z, Zhang L, Gao Y, Zhang L, Jia L, Cui S, Wang P. Proteomic analysis of preterm premature rupture of membranes in placental tissue. Arch Gynecol Obstet 2013; 288:775-84. [PMID: 23580009 DOI: 10.1007/s00404-013-2837-5] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2012] [Accepted: 03/26/2013] [Indexed: 11/25/2022]
Abstract
OBJECTION Preterm premature rupture of membranes (PPROM) is an obstetrics complication and is the leading cause of perinatal mortality and morbidity. PPROM results in critical care emergencies, and nearly all PPROM events are spontaneous and unpredictable. In addition, changes in the proteome in placental tissue during pregnancy that lead to PPROM are not clear. METHODS We utilize a proteomics approach to study the molecular mechanisms behind human PPROM. A better understanding of proteome alteration could lead to the identification of better diagnostic/prognostic markers. Human placental tissue was collected in clearly differentiated cases of PPROM and in a healthy term control. Two-dimensional gel polyacrylamide electrophoresis coupled with mass spectrometry and bioinformatics analysis was utilized to identify proteins with altered expression. RESULTS In this study, only the most important protein differences were selected for further analysis. Most of the identified proteins were structural/cytoskeletal components of the cell or involved in the regulation of energy metabolism and oxidative stress. CONCLUSIONS As a result, this approach has led to the identification of several proteins involved in the underlying pathophysiological mechanisms that can further serve as novel diagnostic tools and targets for rational drug intervention.
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Affiliation(s)
- Aimin Chang
- Department of Clinical Laboratory, The Third Affiliated Hospital of Zhengzhou University, No. 7 Front Kangfu Street, Er'qi District, Zhengzhou, 450052, People's Republic of China
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127
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Bromfield EG, Nixon B. The function of chaperone proteins in the assemblage of protein complexes involved in gamete adhesion and fusion processes. Reproduction 2013; 145:R31-42. [PMID: 23166368 DOI: 10.1530/rep-12-0316] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
The remarkable complexity of the molecular events governing adhesion and fusion of the male and female gametes is becoming apparent. Novel research suggests that these highly specific cellular interactions are facilitated by multiprotein complexes that are delivered to and/or assembled on the surface of the gametes by molecular chaperones in preparation for sperm-egg interaction. While the activation of these molecular chaperones and the mechanisms by which they shuttle proteins to the surface of the cell remain the subject of ongoing investigation, a compelling suggestion is that these processes are augmented by dynamic membrane microdomains or lipid rafts that migrate to the apical region of the sperm head after capacitation. Preliminary studies of the oocyte plasma membrane have also revealed the presence of lipid rafts comprising several molecular chaperones, raising the possibility that similar mechanisms may be involved in the activation of maternal fusion machinery and the regulation of oocyte plasma membrane integrity. Despite these findings, the analysis of oocyte surface multiprotein complexes is currently lacking. Further analyses of the intermediary proteins that facilitate the expression of key players in sperm-egg fusion are likely to deliver important insights into this unique event, which culminates in the cytoplasmic continuity of the male and female gametes.
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Affiliation(s)
- Elizabeth G Bromfield
- Priority Research Centre in Reproductive Science, School of Environmental and Life Sciences, Discipline of Biological Sciences, The University of Newcastle, Callaghan, New South Wales 2308, Australia
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128
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Huszar G, Celik-Ozenci C, Cayli S, Kovacs T, Vigue L, Kovanci E. Semen Characteristics After Overnight Shipping: Preservation of Sperm Concentrations, HspA2 Ratios, CK Activity, Cytoplasmic Retention, Chromatin Maturity, DNA Integrity, and Sperm Shape. ACTA ACUST UNITED AC 2013; 25:593-604. [PMID: 15223848 DOI: 10.1002/j.1939-4640.2004.tb02830.x] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
We tested several approaches that can be used to preserve sperm attributes and the objective biochemical markers of sperm maturity and function for assessment in a remote centralized laboratory after overnight shipping of semen samples. Addition of phenyl-methyl-sulfonyl-fluoride (PMSF) to a final concentration of 20 microg/mL semen at 4 degrees C has preserved sperm concentrations and HspA2 isoform ratios, even at room temperature, simulating a shipping delay in moderate ambient temperatures. Regarding the attributes of individual spermatozoa, the patterns of CK-immunocytochemistry (demonstrates cytoplasmic retention in diminished-maturity spermatozoa); aniline blue staining pattern (tests chromatin maturity); sperm shape assessed by both Kruger strict morphology and computer assisted morphometry; and sperm DNA integrity, as tested by DNA nick translation, all remained unchanged. Thus, the PMSF-4 degrees C conditions preserved sperm concentrations and the cytoplasmic and nuclear biomarkers of sperm cellular maturity and function for next-day analysis. This shipping method will facilitate the early detection of subtle changes in semen quality that can affect sperm function, even when there has been no decline in sperm concentrations to signal possible toxic effects. Furthermore, sample preservation will enable investigators to evaluate semen for toxicology studies and for diagnosis of male infertility from remote locations. Home collection of semen should enhance study participation, and semen assessment in centralized laboratories will address concerns regarding interlaboratory variations and quality control.
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Affiliation(s)
- Gabor Huszar
- Sperm Physiology Laboratory, Division of Reproductive Medicine, Department of Obstetrics and Gynecology, Yale University School of Medicine, New Haven, Connecticut, USA.
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Abstract
RanBPM is a multimodular scaffold protein that interacts with a great variety of molecules including nuclear, cytoplasmic, and membrane proteins. By building multiprotein complexes, RanBPM is thought to regulate various signaling pathways, especially in the immune and nervous system. However, the diversity of these interactions does not facilitate the identification of its precise mechanism of action, and therefore the physiological role of RanBPM still remains unclear. Recently, RanBPM has been shown to be critical for the fertility of both genders in mouse. Although mechanistically it is still unclear how RanBPM affects gametogenesis, the data collected so far suggest that it is a key player in this process. Here, we examine the RanBPM sterility phenotype in the context of other genetic mutations affecting mouse gametogenesis to investigate whether this scaffold protein affects the function of other known proteins whose deficiency results in similar sterility phenotypes.
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Affiliation(s)
- Sandrine Puverel
- Neural Development Section, Mouse Cancer Genetics Program, Center for Cancer Research, NCI, Frederick, Maryland, USA.
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130
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Carman A, Kishinevsky S, Koren J, Lou W, Chiosis G. Chaperone-dependent Neurodegeneration: A Molecular Perspective on Therapeutic Intervention. ACTA ACUST UNITED AC 2013; 2013. [PMID: 25258700 PMCID: PMC4172285 DOI: 10.4172/2161-0460.s10-007] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Maintenance of cellular homeostasis is regulated by the molecular chaperones. Under pathogenic conditions, aberrant proteins are triaged by the chaperone network. These aberrant proteins, known as "clients," have major roles in the pathogenesis of numerous neurological disorders, including tau in Alzheimer's disease, α-synuclein and LRRK2 in Parkinson's disease, SOD-1, TDP-43 and FUS in amyotrophic lateral sclerosis, and polyQ-expanded proteins such as huntingtin in Huntington's disease. Recent work has demonstrated that the use of chemical compounds which inhibit the activity of molecular chaperones subsequently alter the fate of aberrant clients. Inhibition of Hsp90 and Hsc70, two major molecular chaperones, has led to a greater understanding of how chaperone triage decisions are made and how perturbing the chaperone system can promote clearance of these pathogenic clients. Described here are major pathways and components of several prominent neurological disorders. Also discussed is how treatment with chaperone inhibitors, predominately Hsp90 inhibitors which are selective for a diseased state, can relieve the burden of aberrant client signaling in these neurological disorders.
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Affiliation(s)
- Aaron Carman
- Department of Molecular Pharmacology and Chemistry, Memorial Sloan-Kettering Cancer Centre, New York, NY, USA
| | - Sarah Kishinevsky
- Department of Molecular Pharmacology and Chemistry, Memorial Sloan-Kettering Cancer Centre, New York, NY, USA
| | - John Koren
- Department of Molecular Pharmacology and Chemistry, Memorial Sloan-Kettering Cancer Centre, New York, NY, USA
| | - Wenjie Lou
- Department of Neurology and Neuroscience, Weill Cornell Medical College, New York, NY, USA
| | - Gabriela Chiosis
- Department of Molecular Pharmacology and Chemistry, Memorial Sloan-Kettering Cancer Centre, New York, NY, USA
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Worrilow KC, Eid S, Woodhouse D, Perloe M, Smith S, Witmyer J, Ivani K, Khoury C, Ball GD, Elliot T, Lieberman J. Use of hyaluronan in the selection of sperm for intracytoplasmic sperm injection (ICSI): significant improvement in clinical outcomes--multicenter, double-blinded and randomized controlled trial. Hum Reprod 2012. [PMID: 23203216 PMCID: PMC3545641 DOI: 10.1093/humrep/des417] [Citation(s) in RCA: 78] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022] Open
Abstract
STUDY QUESTION Does the selection of sperm for ICSI based on their ability to bind to hyaluronan improve the clinical pregnancy rates (CPR) (primary end-point), implantation (IR) and pregnancy loss rates (PLR)? SUMMARY ANSWER In couples where ≤65% of sperm bound hyaluronan, the selection of hyaluronan-bound (HB) sperm for ICSI led to a statistically significant reduction in PLR. WHAT IS KNOWN AND WHAT THIS PAPER ADDS HB sperm demonstrate enhanced developmental parameters which have been associated with successful fertilization and embryogenesis. Sperm selected for ICSI using a liquid source of hyaluronan achieved an improvement in IR. A pilot study by the primary author demonstrated that the use of HB sperm in ICSI was associated with improved CPR. The current study represents the single largest prospective, multicenter, double-blinded and randomized controlled trial to evaluate the use of hyaluronan in the selection of sperm for ICSI. DESIGN Using the hyaluronan binding assay, an HB score was determined for the fresh or initial (I-HB) and processed or final semen specimen (F-HB). Patients were classified as >65% or ≤65% I-HB and stratified accordingly. Patients with I-HB scores ≤65% were randomized into control and HB selection (HYAL) groups whereas patients with I-HB >65% were randomized to non-participatory (NP), control or HYAL groups, in a ratio of 2:1:1. The NP group was included in the >65% study arm to balance the higher prevalence of patients with I-HB scores >65%. In the control group, oocytes received sperm selected via the conventional assessment of motility and morphology. In the HYAL group, HB sperm meeting the same visual criteria were selected for injection. Patient participants and clinical care providers were blinded to group assignment. PARTICIPANTS AND SETTING Eight hundred two couples treated with ICSI in 10 private and hospital-based IVF programs were enrolled in this study. Of the 484 patients stratified to the I-HB > 65% arm, 115 participants were randomized to the control group, 122 participants were randomized to the HYAL group and 247 participants were randomized to the NP group. Of the 318 patients stratified to the I-HB ≤ 65% arm, 164 participants were randomized to the control group and 154 participants were randomized to the HYAL group. MAIN RESULTS AND THE ROLE OF CHANCE HYAL patients with an F-HB score ≤65% demonstrated an IR of 37.4% compared with 30.7% for control [n = 63, 58, P > 0.05, (95% CI of the difference −7.7 to 21.3)]. In addition, the CPR associated with patients randomized to the HYAL group was 50.8% when compared with 37.9% for those randomized to the control group (n = 63, 58, P > 0.05). The 12.9% difference was associated with a risk ratio (RR) of 1.340 (RR 95% CI 0.89–2.0). HYAL patients with I-HB and F-HB scores ≤65% revealed a statistically significant reduction in their PLR (I-HB: 3.3 versus 15.1%, n = 73, 60, P = 0.021, RR of 0.22 (RR 95% CI 0.05–0.96) (F-HB: 0.0%, 18.5%, n = 27, 32, P = 0.016, RR not applicable due to 0.0% value) over control patients. The study was originally planned to have 200 participants per arm providing 86.1% power to detect an increase in CPR from 35 to 50% at α = 0.05 but was stopped early for financial reasons. As a pilot study had demonstrated that sperm preparation protocols may increase the HB score, the design of the current study incorporated a priori collection and analysis of the data by both the I-HB and the F-HB scores. Analysis by both the I-HB and F-HB score acknowledged the potential impact of sperm preparation protocols. BIAS, CONFOUNDING AND OTHER REASONS FOR CAUTION Selection bias was controlled by randomization. Geographic and seasonal bias was controlled by recruiting from 10 geographically unique sites and by sampling over a 2-year period. The potential for population effect was controlled by adjusting for higher prevalence rates of >65% I-HB that naturally occur by adding the NP arm and to concurrently recruit >65% and ≤65% I-HB subjects. Monitoring and site audits occurred regularly to ensure standardization of data collection, adherence to the study protocol and subject recruitment. Subgroup analysis based on the F-HB score was envisaged in the study design. GENERALIZABILITY TO OTHER POPULATIONS The study included clinics using different sperm preparation methods, located in different regions of the USA and proceeded in every month of the year. Therefore, the results are widely applicable. STUDY FUNDING/COMPETING INTEREST(S) This study was funded by Biocoat, Inc., Horsham, PA, USA. The statistical analysis plan and subsequent analyses were performed by Sherrine Eid, a biostatistician. The manuscript was prepared by Kathryn C. Worrilow, Ph.D. and the study team members. Biocoat, Inc. was permitted to review the manuscript and suggest changes, but the final decision on content was exclusively retained by the authors. K.C.W is a scientific advisor to Biocoat, Inc. S.E. is a consultant to Biocoat, Inc. D.W. has nothing to disclose. M.P., S.S., J.W., K.I., C.K. and T.E. have nothing to disclose. G.D.B. is a consultant to Cooper Surgical and Unisense. J.L. is on the scientific advisory board of Origio. TRIAL REGISTRATION NUMBER NCT00741494.
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Affiliation(s)
- K C Worrilow
- Center Valley, The Pennsylvania State University Lehigh Valley, PA 18034, USA.
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Mou L, Wang Y, Li H, Huang Y, Jiang T, Huang W, Li Z, Chen J, Xie J, Liu Y, Jiang Z, Li X, Ye J, Cai Z, Gui Y. A dominant-negative mutation of HSF2 associated with idiopathic azoospermia. Hum Genet 2012; 132:159-65. [PMID: 23064888 DOI: 10.1007/s00439-012-1234-7] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2012] [Accepted: 09/30/2012] [Indexed: 10/27/2022]
Abstract
Idiopathic azoospermia (IA) is a severe form of male infertility due to unknown causes. The HSF2 gene, encoding the heat shock transcription factor 2, had been suggested to play a significant role in the spermatogenesis process since the Hsf2-knockout male mice showed spermatogenesis defects. To examine whether HSF2 is involved in the pathogenesis of IA in human, we sequenced all the exons of HSF2 in 766 patients diagnosed with IA and 521 proven fertile men. A number of coding mutations private to the patient group, which include three synonymous mutations and five missense mutations, were identified. Of the missense mutations, our functional assay demonstrated that one heterozygous mutation, R502H, caused a complete loss of HSF2 function and that the mutant suppressed the normal function of the wild-type (WT) allele through a dominant-negative effect, thus leading to the dominant penetrance of the mutant allele. These results support a role for HSF2 in the pathogenesis of IA and further implicate this transcription factor as a potential therapeutic target.
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Affiliation(s)
- Lisha Mou
- Guangdong and Shenzhen Key Laboratory of Male Reproductive Medicine and Genetics, Institute of Urology, Peking University Shenzhen Hospital, Shenzhen PKU-HKUST Medical Center, Shenzhen, China.
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Mokánszki A, Molnár Z, Ujfalusi A, Balogh E, Bazsáné ZK, Varga A, Jakab A, Oláh É. Correlation study between sperm concentration, hyaluronic acid-binding capacity and sperm aneuploidy in Hungarian patients. Reprod Biomed Online 2012; 25:620-6. [PMID: 23063816 DOI: 10.1016/j.rbmo.2012.08.003] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2012] [Revised: 08/17/2012] [Accepted: 08/21/2012] [Indexed: 11/17/2022]
Abstract
Infertile men with low sperm concentration and/or less motile spermatozoa have an increased risk of producing aneuploid spermatozoa. Selecting spermatozoa by hyaluronic acid (HA) binding may reduce genetic risks such as chromosomal rearrangements and numerical aberrations. Fluorescence in-situ hybridization (FISH) has been used to evaluate the presence of aneuploidies. This study examined spermatozoa of 10 oligozoospermic, 9 asthenozoospermic, 9 oligoasthenozoospermic and 17 normozoospermic men by HA binding and FISH. Mean percentage of HA-bound spermatozoa in the normozoospermic group was 81%, which was significantly higher than in the oligozoospermic (P<0.001), asthenozoospermic (P<0.001) and oligoasthenozoospermic (P<0.001) groups. Disomy of sex chromosomes (P=0.014) and chromosome 17 (P=0.0019), diploidy (P=0.03) and estimated numerical chromosome aberrations (P=0.004) were significantly higher in the oligoasthenozoospermic group compared with the other groups. There were statistically significant relationships (P<0.001) between sperm concentration and HA binding (r=0.658), between sperm concentration and estimated numerical chromosome aberrations (r=-0.668) and between HA binding and estimated numerical chromosome aberrations (r=-0.682). HA binding and aneuploidy studies of spermatozoa in individual cases allow prediction of reproductive prognosis and provision of appropriate genetic counselling. Infertile men with normal karyotypes and low sperm concentrations and/or less motile spermatozoa have significantly increased risks of producing aneuploid (diminished mature) spermatozoa. Selecting spermatozoa by hyaluronic acid (HA) binding, based on a binding between sperm receptors for zona pellucida and HA, may reduce the potential genetic risks such as chromosomal rearrangements and numerical aberrations. In the present study we examined sperm samples of 45 men with different sperm parameters by HA-binding assay and fluorescence in-situ hybridization (FISH). Mean percentage of HA-bound spermatozoa in the normozoospermic group was significantly higher than the oligozoospermic, the asthenozoospermic and the oligoasthenozoospermic groups. Using FISH, disomy of sex chromosomes and chromosome 17, diploidy and estimated numerical chromosome aberration frequencies were significantly higher in the oligoasthenozoospermic group compared with the three other groups. A significant positive correlation was found between the sperm concentration and the HA-binding capacity, and significant negative correlations between the sperm concentration and the estimated numerical chromosomes aberrations as well as between the HA-binding ability and the estimated numerical chromosome aberrations were identified. We conclude that HA-binding assay and sperm aneuploidy study using FISH may help to predict the reproductive ability of selected infertile male patients and to provide appropriate genetic counselling.
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Affiliation(s)
- Attila Mokánszki
- Clinical Genetic Center, Department of Pediatrics, Medical and Health Science Center, University of Debrecen, Debrecen, Hungary
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134
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Choi MS, Shim MR, Oh MY, Kim KW, Lee HC, Yang BC, Chung HK, Kim JH, Lee HT, Hwang IS, Hochi S, Heo YT, Kim NH, Uhm SJ, Park JK, Chang WK, Chung HJ. Proteins associated with reproductive disorders in testes of human erythropoietin gene-harboring transgenic boars. Theriogenology 2012; 78:1020-9. [DOI: 10.1016/j.theriogenology.2012.02.013] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2011] [Revised: 02/07/2012] [Accepted: 02/10/2012] [Indexed: 11/27/2022]
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135
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Bromodomain-dependent stage-specific male genome programming by Brdt. EMBO J 2012; 31:3809-20. [PMID: 22922464 PMCID: PMC3463845 DOI: 10.1038/emboj.2012.233] [Citation(s) in RCA: 187] [Impact Index Per Article: 15.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2012] [Accepted: 08/10/2012] [Indexed: 11/08/2022] Open
Abstract
Male germ cell differentiation is a highly regulated multistep process initiated by the commitment of progenitor cells into meiosis and characterized by major chromatin reorganizations in haploid spermatids. We report here that a single member of the double bromodomain BET factors, Brdt, is a master regulator of both meiotic divisions and post-meiotic genome repackaging. Upon its activation at the onset of meiosis, Brdt drives and determines the developmental timing of a testis-specific gene expression program. In meiotic and post-meiotic cells, Brdt initiates a genuine histone acetylation-guided programming of the genome by activating essential genes and repressing a 'progenitor cells' gene expression program. At post-meiotic stages, a global chromatin hyperacetylation gives the signal for Brdt's first bromodomain to direct the genome-wide replacement of histones by transition proteins. Brdt is therefore a unique and essential regulator of male germ cell differentiation, which, by using various domains in a developmentally controlled manner, first drives a specific spermatogenic gene expression program, and later controls the tight packaging of the male genome.
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136
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Punwani D, Simon K, Choi Y, Dutra A, Gonzalez-Espinosa D, Pak E, Naradikian M, Song CH, Zhang J, Bodine DM, Puck JM. Transcription factor zinc finger and BTB domain 1 is essential for lymphocyte development. JOURNAL OF IMMUNOLOGY (BALTIMORE, MD. : 1950) 2012; 189:1253-64. [PMID: 22753936 PMCID: PMC3401355 DOI: 10.4049/jimmunol.1200623] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Absent T lymphocytes were unexpectedly found in homozygotes of a transgenic mouse from an unrelated project. T cell development did not progress beyond double-negative stage 1 thymocytes, resulting in a hypocellular, vestigial thymus. B cells were present, but NK cell number and B cell isotype switching were reduced. Transplantation of wild-type hematopoietic cells corrected the defect, which was traced to a deletion involving five contiguous genes at the transgene insertion site on chromosome 12C3. Complementation using bacterial artificial chromosome transgenesis implicated zinc finger BTB-POZ domain protein 1 (Zbtb1) in the immunodeficiency, confirming its role in T cell development and suggesting involvement in B and NK cell differentiation. Targeted disruption of Zbtb1 recapitulated the T(-)B(+)NK(-) SCID phenotype of the original transgenic animal. Knockouts for Zbtb1 had expanded populations of bone marrow hematopoietic stem cells and also multipotent and early lymphoid lineages, suggesting a differentiation bottleneck for common lymphoid progenitors. Expression of mRNA encoding Zbtb1, a predicted transcription repressor, was greatest in hematopoietic stem cells, thymocytes, and pre-B cells, highlighting its essential role in lymphoid development.
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MESH Headings
- Animals
- Cell Differentiation/genetics
- Cell Differentiation/immunology
- Hematopoietic Stem Cells/cytology
- Hematopoietic Stem Cells/immunology
- Hematopoietic Stem Cells/metabolism
- Lymphocyte Subsets/cytology
- Lymphocyte Subsets/immunology
- Lymphocyte Subsets/metabolism
- Mice
- Mice, Inbred C57BL
- Mice, Knockout
- Mice, SCID
- Mice, Transgenic
- NIH 3T3 Cells
- Precursor Cells, B-Lymphoid/cytology
- Precursor Cells, B-Lymphoid/immunology
- Precursor Cells, B-Lymphoid/metabolism
- Precursor Cells, T-Lymphoid/cytology
- Precursor Cells, T-Lymphoid/immunology
- Precursor Cells, T-Lymphoid/metabolism
- RNA, Messenger/biosynthesis
- Repressor Proteins/deficiency
- Repressor Proteins/genetics
- Repressor Proteins/physiology
- Zinc Fingers/immunology
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Affiliation(s)
- Divya Punwani
- Dept. of Pediatrics, University of California San Francisco, San Francisco, CA 91413; USA
| | - Karen Simon
- National Human Genome Research Institute, NIH, Bethesda, MD 20892; USA
| | - Youngnim Choi
- Dept. of Oromaxillofacial Infection & Immunity, School of Dentistry, Seoul National University, Seoul, Korea 28 Yungun-dong, Jongno-gu, Seoul 110-74928
| | - Amalia Dutra
- National Human Genome Research Institute, NIH, Bethesda, MD 20892; USA
| | | | - Evgenia Pak
- National Human Genome Research Institute, NIH, Bethesda, MD 20892; USA
| | - Martin Naradikian
- Dept. of Pediatrics, University of California San Francisco, San Francisco, CA 91413; USA
- University of Pennsylvania, Philadelphia, Pennsylvania, PA 19104; USA
| | - Chang-Hwa Song
- Dept. of Pediatrics, University of California San Francisco, San Francisco, CA 91413; USA
- Dept. of Microbiology, College of Medicine, Chungnam National University, South Korea
| | - Jenny Zhang
- Dept. of Pediatrics, University of California San Francisco, San Francisco, CA 91413; USA
| | - David M. Bodine
- National Human Genome Research Institute, NIH, Bethesda, MD 20892; USA
| | - Jennifer M. Puck
- Dept. of Pediatrics, University of California San Francisco, San Francisco, CA 91413; USA
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137
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Parte PP, Rao P, Redij S, Lobo V, D'Souza SJ, Gajbhiye R, Kulkarni V. Sperm phosphoproteome profiling by ultra performance liquid chromatography followed by data independent analysis (LC-MS(E)) reveals altered proteomic signatures in asthenozoospermia. J Proteomics 2012; 75:5861-71. [PMID: 22796355 DOI: 10.1016/j.jprot.2012.07.003] [Citation(s) in RCA: 92] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2012] [Revised: 06/28/2012] [Accepted: 07/02/2012] [Indexed: 11/30/2022]
Abstract
Sperm motility is an important prerequisite for successful fertilization and is regulated by cyclic AMP activated protein kinase A which phosphorylates flagella proteins like axonemal dynein and initiates motility. Increase in calcium influx reverses this process by dephosphorylation that is mediated by calcineurin. Analyzing the phosphoenriched fractions of spermatozoa lysates from eight normozoospermic-, and asthenozoospermic-samples, respectively, by Nano UPLC-MS(E), the present study investigates the phosphoproteins involved in sperm motility in an attempt to identify the key pathways regulating sperm motility and likely to be altered in spermatozoa of asthenozoospermic individuals. 66 phosphoproteins were differentially regulated in asthenozoospermia. The deregulated proteins comprised predominantly the HSPs, cytoskeletal proteins, proteins associated with the fibrous sheath, and those associated with energy metabolism. EM analysis of these spermatozoa demonstrated significant defects in mitochondria, and fibrous sheath and these defects could be correlated with the altered proteome. Pathway analysis revealed that carbohydrate and energy metabolism, cAMP mediated PKA signaling, PI3K/AKT signaling and pathway regulating actin based motility by Rho were significantly altered indicating that motility in spermatozoa is regulated through the concerted effort of these pathways. The data identified signature molecules that have the potential as biomarkers for diagnosing etiology of asthenozoospermia.
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Affiliation(s)
- Priyanka P Parte
- Dept. of Gamete Immunobiology, National Institute for Research in Reproductive Health (ICMR), Mumbai, India.
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138
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Motiei M, Tavalaee M, Rabiei F, Hajihosseini R, Nasr-Esfahani MH. Evaluation of HSPA2 in fertile and infertile individuals. Andrologia 2012; 45:66-72. [DOI: 10.1111/j.1439-0272.2012.01315.x] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/05/2012] [Indexed: 11/28/2022] Open
Affiliation(s)
| | - M. Tavalaee
- Department of Reproduction and Development, Reproductive Biomedicine Research Center; Royan Institute of Biotechnology, ACECR; Isfahan; Iran
| | - F. Rabiei
- Department of Cell & Molecular Biotechnology, Cell Sciences Research Center; Royan Institute for Biotechnology, ACECR; Isfahan; Iran
| | - R. Hajihosseini
- Department of Biochemistry; Payame Noor University; Tehran; Iran
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139
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Mjahed H, Girodon F, Fontenay M, Garrido C. Heat shock proteins in hematopoietic malignancies. Exp Cell Res 2012; 318:1946-58. [PMID: 22652452 DOI: 10.1016/j.yexcr.2012.05.012] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2012] [Revised: 05/09/2012] [Accepted: 05/14/2012] [Indexed: 01/13/2023]
Abstract
Inducible heat shock proteins are molecular chaperones whose expression is increased after many different types of stress. They have a protective function helping the cell to cope with lethal conditions. Their basal expression is low in nonstressed, normal and nontransformed cells. However, in cancer cells and particularly in hematological malignancies, they are surprisingly abundant. Malignant cells have to rewire their metabolic requirements and therefore have a higher need for chaperones. This cancer cell addiction for HSPs is the basis for the use of HSP inhibitors in cancer therapy. HSPs have been shown to interact with different key apoptotic proteins. As a result, HSPs can essentially block the apoptotic pathways at several steps, most of them involving the activation of cystein proteases called caspases. Apoptosis and differentiation are physiological processes that share many common features, for instance, a controlled caspase activation and chromatin condensation are frequently observed. It is, therefore, not surprising that HSPs may be implicated in the differentiation process. HSPs may determine the fate of the cells by orchestrating the decision of apoptosis versus differentiation. This review will focus on the role of HSPs in hematological malignancies and the emerging therapeutic options that are being either proposed or used to target these protective proteins.
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Affiliation(s)
- Hajare Mjahed
- Inserm, UMR866, Faculty of Medicine, 7 Boulevard Jeanne D'Arc, F-21000 Dijon, France
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140
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Khoo KHP, Able AJ, Chataway TK, Able JA. Preliminary characterisation of two early meiotic wheat proteins after identification through 2D gel electrophoresis proteomics. FUNCTIONAL PLANT BIOLOGY : FPB 2012; 39:222-235. [PMID: 32480776 DOI: 10.1071/fp11253] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/11/2011] [Accepted: 12/24/2011] [Indexed: 06/11/2023]
Abstract
Various genetic-based approaches including mutant population screens, microarray analyses, cloning and transgenesis have broadened our knowledge of gene function during meiosis in plants. Nonetheless, these genetic tools are not without inherent limitations. One alternative approach to studying plant meiosis, especially in polyploids such as Triticum aestivum L. (bread wheat), is proteomics. However, protein-based approaches using proteomics have seldom been described, with only two attempts at studying early plant meiosis reported. Here, we report the investigation of early bread wheat meiosis using proteomics. Five differentially expressed protein spots were identified using 2D gel electrophoresis (2DGE) on protein extracts from four pooled stages of meiosis and three genotypes (Chinese Spring wild-type, ph1b and ph2a wheat mutant lines). Tandem mass spectrometry (MS/MS) identification of peptides from these protein spots led to the isolation and characterisation of the full-length clones of a wheat Speckle-type POZ protein, an SF21-like protein and HSP70, and a partial coding sequence of a hexose transporter. Significantly, the putative functions of the Speckle-type POZ protein and HSP70 were confirmed using in vitro DNA binding assays. Through the use of a 2DGE proteomics approach, we show that proteomics is a viable alternative to genetic-based approaches when studying meiosis in wheat. More significantly, we report a potential role for a Speckle-type POZ protein and a HSP70 in chromosome pairing during the early stages of meiosis in bread wheat.
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Affiliation(s)
- Kelvin H P Khoo
- School of Agriculture, Food and Wine, Waite Research Institute, The University of Adelaide, Waite Campus, PMB1, Glen Osmond, SA 5064, Australia
| | - Amanda J Able
- School of Agriculture, Food and Wine, Waite Research Institute, The University of Adelaide, Waite Campus, PMB1, Glen Osmond, SA 5064, Australia
| | - Timothy K Chataway
- Proteomics Laboratory, School of Medicine, Flinders University, Bedford Park, SA 5042, Australia
| | - Jason A Able
- School of Agriculture, Food and Wine, Waite Research Institute, The University of Adelaide, Waite Campus, PMB1, Glen Osmond, SA 5064, Australia
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141
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Whiley PAF, Miyamoto Y, McLachlan RI, Jans DA, Loveland KL. Changing subcellular localization of nuclear transport factors during human spermatogenesis. INTERNATIONAL JOURNAL OF ANDROLOGY 2012; 35:158-69. [PMID: 21812786 DOI: 10.1111/j.1365-2605.2011.01202.x] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/16/2023]
Abstract
Spermatogenesis requires progressive changes in gene expression mediated by hormonal and local factors. Regulated macromolecular movement between nuclear and cytoplasmic compartments enables these essential responses to changing extracellular cues, and dynamic production of the nucleocytoplasmic transporters and importin proteins, throughout gametogenesis in rodents implicates them as key mediators of germline differentiation. We examined normal adult human testis expression profiles of six importins plus five additional proteins involved in nucleocytoplasmic transport. Although most were detected in the nucleus during germline differentiation, importin α4 was exclusively observed in Sertoli and germ cell cytoplasm. Many proteins were present in round spermatid nuclei (importins α1, α3, β1, β3; exportin-1, Nup62, Ran, RanBP1, RCC1), and remarkable intense nuclear and/or nuclear-associated signals were detected for importin α1, importin α3 and Nup62 in spermatocytes. This study identifies conserved aspects of nucleocytoplasmic transport during spermatogenesis and extends our knowledge of the dynamic presence of these proteins, which indicates that they contribute to germ cell-specific cargo trafficking and potentially to other functions during human spermatogenesis. We also demonstrate for the first time that importin α3 is nuclear in spermatocytes, when exportin-1 is cytoplasmic, suggesting that nuclear transport is altered during meiosis.
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Affiliation(s)
- P A F Whiley
- Department of Biochemistry and Molecular Biology, Monash University, Clayton, Victoria, Australia
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142
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Zhang W, Fang M, Li Y, Nie Q, Zhang X. Identification of TDRP1 Gene and Its Association with Pig Reproduction Traits. DNA Cell Biol 2012; 31:371-7. [DOI: 10.1089/dna.2011.1328] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Affiliation(s)
- Wei Zhang
- Department of Animal Genetics, Breeding and Reproduction, College of Animal Science, South China Agricultural University, Guangzhou, China
- Guangdong Provincial Key Lab of Agro-Animal Genomics and Molecular Breeding, Guangzhou, China
| | - Meixia Fang
- Department of Laboratory Animal Science, Medical College of Jinan University, Guangzhou, China
| | - Ying Li
- Department of Animal Genetics, Breeding and Reproduction, College of Animal Science, South China Agricultural University, Guangzhou, China
- Guangdong Provincial Key Lab of Agro-Animal Genomics and Molecular Breeding, Guangzhou, China
| | - Qinghua Nie
- Department of Animal Genetics, Breeding and Reproduction, College of Animal Science, South China Agricultural University, Guangzhou, China
- Guangdong Provincial Key Lab of Agro-Animal Genomics and Molecular Breeding, Guangzhou, China
| | - Xiquan Zhang
- Department of Animal Genetics, Breeding and Reproduction, College of Animal Science, South China Agricultural University, Guangzhou, China
- Guangdong Provincial Key Lab of Agro-Animal Genomics and Molecular Breeding, Guangzhou, China
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143
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Ji ZL, Duan YG, Mou LS, Allam JP, Haidl G, Cai ZM. Association of heat shock proteins, heat shock factors and male infertility. ASIAN PACIFIC JOURNAL OF REPRODUCTION 2012. [DOI: 10.1016/s2305-0500(13)60053-6] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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144
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Jan SZ, Hamer G, Repping S, de Rooij DG, van Pelt AMM, Vormer TL. Molecular control of rodent spermatogenesis. Biochim Biophys Acta Mol Basis Dis 2012; 1822:1838-50. [PMID: 22366765 DOI: 10.1016/j.bbadis.2012.02.008] [Citation(s) in RCA: 141] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2011] [Revised: 02/03/2012] [Accepted: 02/06/2012] [Indexed: 12/29/2022]
Abstract
Spermatogenesis is a complex developmental process that ultimately generates mature spermatozoa. This process involves a phase of proliferative expansion, meiosis, and cytodifferentiation. Mouse models have been widely used to study spermatogenesis and have revealed many genes and molecular mechanisms that are crucial in this process. Although meiosis is generally considered as the most crucial phase of spermatogenesis, mouse models have shown that pre-meiotic and post-meiotic phases are equally important. Using knowledge generated from mouse models and in vitro studies, the current review provides an overview of the molecular control of rodent spermatogenesis. Finally, we briefly relate this knowledge to fertility problems in humans and discuss implications for future research. This article is part of a Special Issue entitled: Molecular Genetics of Human Reproductive Failure.
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Affiliation(s)
- Sabrina Z Jan
- Center for Reproductive Medicine, Academic Medical Center, University of Amsterdam, Amsterdam, The Netherlands
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145
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Ma DHK, Lai JY, Yu ST, Liu JY, Yang U, Chen HCJ, Yeh LK, Ho YJ, Chang G, Wang SF, Chen JK, Lin KK. Up-regulation of heat shock protein 70-1 (Hsp70-1) in human limbo-corneal epithelial cells cultivated on amniotic membrane: A proteomic study. J Cell Physiol 2012; 227:2030-9. [DOI: 10.1002/jcp.22932] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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146
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Genetics of Meiosis and Recombination in Mice. INTERNATIONAL REVIEW OF CELL AND MOLECULAR BIOLOGY VOLUME 298 2012; 298:179-227. [DOI: 10.1016/b978-0-12-394309-5.00005-5] [Citation(s) in RCA: 82] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
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147
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Marteil G, Gagné JP, Borsuk E, Richard-Parpaillon L, Poirier GG, Kubiak JZ. Proteomics reveals a switch in CDK1-associated proteins upon M-phase exit during the Xenopus laevis oocyte to embryo transition. Int J Biochem Cell Biol 2011; 44:53-64. [PMID: 21959252 DOI: 10.1016/j.biocel.2011.09.003] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2011] [Revised: 09/09/2011] [Accepted: 09/14/2011] [Indexed: 02/04/2023]
Abstract
Cyclin-dependent kinase 1 (CDK1) is a major M-phase kinase which requires the binding to a regulatory protein, Cyclin B, to be active. CDK1/Cyclin B complex is called M-phase promoting factor (MPF) for its key role in controlling both meiotic and mitotic M-phase of the cell cycle. CDK1 inactivation is necessary for oocyte activation and initiation of embryo development. This complex process requires both Cyclin B polyubiquitination and proteosomal degradation via the ubiquitin-conjugation pathway, followed by the dephosphorylation of the monomeric CDK1 on Thr161. Previous proteomic analyses revealed a number of CDK1-associated proteins in human HeLa cells. It is, however, unknown whether specific partners are involved in CDK1 inactivation upon M-phase exit. To better understand CDK1 regulation during MII-arrest and oocyte activation, we immunoprecipitated (IPed) CDK1 together with its associated proteins from M-phase-arrested and M-phase-exiting Xenopus laevis oocytes. A mass spectrometry (MS) analysis revealed a number of new putative CDK1 partners. Most importantly, the composition of the CDK1-associated complex changed rapidly during M-phase exit. Additionally, an analysis of CDK1 complexes precipitated with beads covered with p9 protein, a fission yeast suc1 homologue well known for its high affinity for CDKs, was performed to identify the most abundant proteins associated with CDK1. The screen was auto-validated by identification of: (i) two forms of CDK1: Cdc2A and B, (ii) a set of Cyclins B with clearly diminishing number of peptides identified upon M-phase exit, (iii) a number of known CDK1 substrates (e.g. peroxiredoxine) and partners (e.g. HSPA8, a member of the HSP70 family) both in IP and in p9 precipitated pellets. In IP samples we also identified chaperones, which can modulate CDK1 three-dimensional structure, as well as calcineurin, a protein necessary for successful oocyte activation. These results shed a new light on CDK1 regulation via a dynamic change in the composition of the protein complex upon M-phase exit and the oocyte to embryo transition.
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Affiliation(s)
- Gaëlle Marteil
- CNRS, UMR 6061, Institute of Genetics and Development of Rennes, Rennes, France
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148
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Ijiri TW, Merdiushev T, Cao W, Gerton GL. Identification and validation of mouse sperm proteins correlated with epididymal maturation. Proteomics 2011; 11:4047-62. [PMID: 21805633 DOI: 10.1002/pmic.201100075] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2011] [Revised: 06/03/2011] [Accepted: 07/11/2011] [Indexed: 01/16/2023]
Abstract
Sperm need to mature in the epididymis to become capable of fertilization. To understand the molecular mechanisms of mouse sperm maturation, we conducted a proteomic analysis using saturation dye labeling to identify proteins of caput and cauda epididymal sperm that exhibited differences in amounts or positions on two-dimensional gels. Of eight caput epididymal sperm-differential proteins, three were molecular chaperones and three were structural proteins. Of nine cauda epididymal sperm-differential proteins, six were enzymes of energy metabolism. To validate these proteins as markers of epididymal maturation, immunoblotting and immunofluorescence analyses were performed. During epididymal transit, heat shock protein 2 was eliminated with the cytoplasmic droplet and smooth muscle γ-actin exhibited reduced fluorescence from the anterior acrosome while the signal intensity of aldolase A increased, especially in the principal piece. Besides these changes, we observed protein spots, such as glutathione S-transferase mu 5 and the E2 component of pyruvate dehydrogenase complex, shifting to more basic isoelectric points, suggesting post-translational changes such dephosphorylation occur during epididymal maturation. We conclude that most caput epididymal sperm-differential proteins contribute to the functional modification of sperm structures and that many cauda epididymal sperm-differential proteins are involved in ATP production that promotes sperm functions such as motility.
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Affiliation(s)
- Takashi W Ijiri
- Center for Research on Reproduction and Women's Health, Department of Obstetrics and Gynecology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA 19104-6080, USA
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149
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Kabani M, Martineau CN. Multiple hsp70 isoforms in the eukaryotic cytosol: mere redundancy or functional specificity? Curr Genomics 2011; 9:338-248. [PMID: 19471609 PMCID: PMC2685646 DOI: 10.2174/138920208785133280] [Citation(s) in RCA: 79] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2008] [Revised: 05/15/2008] [Accepted: 05/19/2008] [Indexed: 12/30/2022] Open
Abstract
Hsp70 molecular chaperones play a variety of functions in every organism, cell type and organelle, and their activities have been implicated in a number of human pathologies, ranging from cancer to neurodegenerative diseases. The functions, regulations and structure of Hsp70s were intensively studied for about three decades, yet much still remains to be learned about these essential folding enzymes. Genome sequencing efforts revealed that most genomes contain multiple members of the Hsp70 family, some of which co-exist in the same cellular compartment. For example, the human cytosol and nucleus contain six highly homologous Hsp70 proteins while the yeast Saccharomyces cerevisiae contains four canonical Hsp70s and three fungal-specific ribosome-associated and specialized Hsp70s. The reasons and significance of the requirement for multiple Hsp70s is still a subject of debate. It has been postulated for a long time that these Hsp70 isoforms are functionally redundant and differ only by their spatio-temporal expression patterns. However, several studies in yeast and higher eukaryotic organisms challenged this widely accepted idea by demonstrating functional specificity among Hsp70 isoforms. Another element of complexity is brought about by specific cofactors, such as Hsp40s or nucleotide exchange factors that modulate the activity of Hsp70s and their binding to client proteins. Hence, a dynamic network of chaperone/co-chaperone interactions has evolved in each organism to efficiently take advantage of the multiple cellular roles Hsp70s can play. We summarize here our current knowledge of the functions and regulations of these molecular chaperones, and shed light on the known functional specificities among isoforms.
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Affiliation(s)
- Mehdi Kabani
- Laboratoire d'Enzymologie et Biochimie Structurales (LEBS), CNRS, Bât. 34, Avenue de la Terrasse, 91198 Gif-sur-Yvette, France
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Chi MN, Auriol J, Jégou B, Kontoyiannis DL, Turner JMA, de Rooij DG, Morello D. The RNA-binding protein ELAVL1/HuR is essential for mouse spermatogenesis, acting both at meiotic and postmeiotic stages. Mol Biol Cell 2011; 22:2875-85. [PMID: 21737689 PMCID: PMC3154883 DOI: 10.1091/mbc.e11-03-0212] [Citation(s) in RCA: 49] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
Abstract
Spermatogenesis is a complex process that relies on extensive regulation of mRNA storage and translation. We investigate the role of the RNA-binding protein HuR in this process by using both germ cell–specific loss- and gain-of-function strategies and show that HuR is required in both meiotic and postmeiotic steps of male germ cell differentiation. Posttranscriptional mechanisms are crucial to regulate spermatogenesis. Accurate protein synthesis during germ cell development relies on RNA binding proteins that control the storage, stability, and translation of mRNAs in a tightly and temporally regulated manner. Here, we focused on the RNA binding protein Embryonic Lethal Abnormal Vision (ELAV) L1/Human antigen R (HuR) known to be a key regulator of posttranscriptional regulation in somatic cells but the function of which during gametogenesis has never been investigated. In this study, we have used conditional loss- and gain-of-function approaches to address this issue in mice. We show that targeted deletion of HuR specifically in germ cells leads to male but not female sterility. Mutant males are azoospermic because of the extensive death of spermatocytes at meiotic divisions and failure of spermatid elongation. The latter defect is also observed upon HuR overexpression. To elucidate further the molecular mechanisms underlying spermatogenesis defects in HuR-deleted and -overexpressing testes, we undertook a target gene approach and discovered that heat shock protein (HSP)A2/HSP70-2, a crucial regulator of spermatogenesis, was down-regulated in both situations. HuR specifically binds hspa2 mRNA and controls its expression at the translational level in germ cells. Our study provides the first genetic evidence of HuR involvement during spermatogenesis and reveals Hspa2 as a target for HuR.
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Affiliation(s)
- Mai Nguyen Chi
- CBD, UMR5547, IFR 109, Université Paul Sabatier, 31062 Toulouse Cedex, France
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