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Liao HY, O’Flaherty C. Lysophosphatidic Acid Signalling Regulates Human Sperm Viability via the Phosphoinositide 3-Kinase/AKT Pathway. Cells 2023; 12:2196. [PMID: 37681929 PMCID: PMC10486690 DOI: 10.3390/cells12172196] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2023] [Revised: 08/24/2023] [Accepted: 08/29/2023] [Indexed: 09/09/2023] Open
Abstract
Lysophosphatidic acid (LPA) signalling is essential for maintaining germ cell viability during mouse spermatogenesis; however, its role in human spermatozoa is unknown. We previously demonstrated that peroxiredoxin 6 (PRDX6) calcium-independent phospholipase A2 (iPLA2) releases lysophospholipids such as LPA or arachidonic acid (AA) and that inhibiting PRDX6 iPLA2 activity impairs sperm cell viability. The exogenous addition of LPA bypassed the inhibition of PRDX6 iPLA2 activity and maintained the active phosphoinositide 3-kinase (PI3K)/AKT pathway. Here, we aimed to study PI3K/AKT pathway regulation via LPA signalling and protein kinases in maintaining sperm viability. The localization of LPARs in human spermatozoa was determined using immunocytochemistry, and P-PI3K and P-AKT substrate phosphorylations via immunoblotting. Sperm viability was determined using the hypo-osmotic swelling test. LPAR1, 3, 5 and 6 were located on the sperm plasma membrane. The inhibition of LPAR1-3 with Ki16425 promoted the impairment of sperm viability and decreased the phosphorylation of PI3K AKT substrates. Inhibitors of PKC, receptor-type PTK and PLC impaired sperm viability and the PI3K/AKT pathway. Adding 1-oleoyl-2-acetyl-snglycerol (OAG), a cell-permeable analog of diacylglycerol (DAG), prevented the loss of sperm viability and maintained the phosphorylation of PI3K. In conclusion, human sperm viability is supported by LPAR signalling and regulated by PLC, PKC and RT-PTK by maintaining phosphorylation levels of PI3K and AKT substrates.
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Affiliation(s)
- Hao-Yu Liao
- Department of Medicine, Experimental Medicine Division, Faculty of Medicine and Health Sciences, McGill University, Montreal, QC H3A 0G4, Canada
- Department of Surgery, Urology Division, Faculty of Medicine and Health Sciences, McGill University, Montreal, QC H3A 0G4, Canada
- The Research Institute, McGill University Health Centre, Montreal, QC H4A 3J1, Canada
| | - Cristian O’Flaherty
- Department of Medicine, Experimental Medicine Division, Faculty of Medicine and Health Sciences, McGill University, Montreal, QC H3A 0G4, Canada
- Department of Surgery, Urology Division, Faculty of Medicine and Health Sciences, McGill University, Montreal, QC H3A 0G4, Canada
- The Research Institute, McGill University Health Centre, Montreal, QC H4A 3J1, Canada
- Department of Anatomy and Cell Biology, Faculty of Medicine and Health Sciences, McGill University, Montreal, QC H3A 0G4, Canada
- Department of Pharmacology and Therapeutics, Faculty of Medicine and Health Sciences, McGill University, Montreal, QC H3A 0G4, Canada
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2
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Feng X, Ma BF, Liu B, Ding P, Wei JH, Cheng P, Li SY, Chen DX, Sun ZJ, Li Z. The Involvement of the Chemokine RANTES in Regulating Luminal Acidification in Rat Epididymis. Front Immunol 2020; 11:583274. [PMID: 33072131 PMCID: PMC7544837 DOI: 10.3389/fimmu.2020.583274] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2020] [Accepted: 09/07/2020] [Indexed: 12/03/2022] Open
Abstract
Background A complex interplay between different cell types in the epithelium leads to activation of the luminal acidifying capacity of the epididymis, a process that is crucial for sperm maturation and storage. Basal cells sense the luminal angiotensin II (ANG II) and stimulate proton secretion in clear cells through nitric oxide (NO). Our previous study has shown the chemokine regulated upon activation normal T-cell expressed and secreted (RANTES) was expressed in the F4/80 positive macrophages of human epididymis. The objective of this study was to explore the involvement of RANTES in regulating the luminal acidification in the rat epididymis. Methods The role of RANTES was investigated by in vivo perfusion with recombinant RANTES, Met-RANTES, and PBS of different pH values. Furthermore, rats vasectomy was performed to alter the epididymal luminal pH. RIA was used to measure the tissue homogenate ANG II concentration. Real time-PCR and western blot were employed to examine the expression levels of AGTR2, RANTES, CCR1, CCR5, and iNOS in epididymis. Results RANTES was restricted to the basal macrophages of epididymal ducts and co-localized with its receptors CCR1 and CCR5. Both V-ATPase and iNOS were up-regulated in the cauda epididymis after perfused with recombinant RANTES, while the antagonist Met-RANTES perfusion led to a complete abrogation of the increased expression of V-ATPase in the apical membrane of clear cells and iNOS in macrophages. Upon alkaline perfusion, RANTES expression was significantly increased and the apical accumulation of V-ATPase in the clear cells was induced in the cauda epididymis. The luminal pH in the cauda epididymis increased after vasectomy. The concentration of the ANG II and the expression levels of AGTR2, RANTES, CCR1, CCR5, and iNOS dropped in the cauda epididymis following vasectomy. Conclusion Upon the activation of basal cells, RANTES might induce the NO release from macrophages by interacting with its receptors, which increases proton secretion by adjacent clear cells. Thus, RANTES is possible to participate in the crosstalk among basal cells, macrophages and clear cells for the fine control of an optimum acidic luminal environment that is critical for male fertility.
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Affiliation(s)
- Xiao Feng
- Department of Human Anatomy, Histology and Embryology, Fourth Military Medical University, Xi'an, China
| | - Bin-Fang Ma
- Department of Human Anatomy, Histology and Embryology, Fourth Military Medical University, Xi'an, China
| | - Bo Liu
- Department of Human Anatomy, Histology and Embryology, Fourth Military Medical University, Xi'an, China
| | - Peng Ding
- Department of Human Anatomy, Histology and Embryology, Fourth Military Medical University, Xi'an, China
| | - Jin-Hua Wei
- Department of Human Anatomy, Histology and Embryology, Fourth Military Medical University, Xi'an, China
| | - Pang Cheng
- Department of Human Anatomy, Histology and Embryology, Fourth Military Medical University, Xi'an, China
| | - Sheng-Yu Li
- Department of Human Anatomy, Histology and Embryology, Fourth Military Medical University, Xi'an, China
| | - Dong-Xu Chen
- Department of Human Anatomy, Histology and Embryology, Fourth Military Medical University, Xi'an, China
| | - Zhi-Jian Sun
- The General Hospital of Northern Theater Command, Shenyang, China
| | - Zhen Li
- Department of Human Anatomy, Histology and Embryology, Fourth Military Medical University, Xi'an, China
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3
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Ghieh F, Mitchell V, Mandon-Pepin B, Vialard F. Genetic defects in human azoospermia. Basic Clin Androl 2019; 29:4. [PMID: 31024732 PMCID: PMC6477738 DOI: 10.1186/s12610-019-0086-6] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2018] [Accepted: 03/07/2019] [Indexed: 02/07/2023] Open
Abstract
As with many other diseases, genetic testing in human azoospermia was initially restricted to karyotype analyses (leading to diagnostic chromosome rearrangement tests for Klinefelter and other syndromes). With the advent of molecular biology in the 1980s, genetic screening was broadened to analyses of Y chromosome microdeletions and the gene coding for the cystic fibrosis transmembrane conductance regulator (CFTR). Decades later, the emergence of whole-genome techniques has led to the identification of other genetic defects associated with human azoospermia. Although TEX11 and ADGRG2 defects are frequently described in men with azoospermia, most of the causal gene defects found to date are private (i.e. identified in a small number of consanguineous families). Here, we provide an up-to-date overview of all the types of genetic defects known to be linked to human azoospermia and try to give clinical practice guidelines according to azoospermia phenotype. Along with homozygous mutations, polymorphisms and epigenetic defects are also briefly discussed. However, as these variations predispose to azoospermia, a specific review will be needed to compile data on all the particular genetic variations reported in the literature.
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Affiliation(s)
- Farah Ghieh
- 1EA7404-GIG, UFR des Sciences de la Santé Simone Veil, UVSQ, Montigny le Bretonneux, France
| | - Valérie Mitchell
- 2CHU Lille, Reproductive Biology Institute-Spermiologie-CECOS, Jeanne de Flandre Hospital, Lille, France.,3EA4308 "Gametogenesis and Gamete Quality", University of Lille, Lille, France
| | | | - François Vialard
- 1EA7404-GIG, UFR des Sciences de la Santé Simone Veil, UVSQ, Montigny le Bretonneux, France.,Genetics Division, CHI de Poissy St Germain en Laye, Poissy, France
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4
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Sharma S, Hanukoglu I. Mapping the sites of localization of epithelial sodium channel (ENaC) and CFTR in segments of the mammalian epididymis. J Mol Histol 2019; 50:141-154. [PMID: 30659401 DOI: 10.1007/s10735-019-09813-3] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2018] [Accepted: 01/14/2019] [Indexed: 01/17/2023]
Abstract
The sperm produced in the seminiferous tubules pass through the rete testis, efferent ducts, and epididymis. The epididymis has three distinct regions known as caput, corpus, and cauda. The transit through the epididymis is an essential process in sperm maturation. The lumen of each epididymal region has a unique fluid composition regulated by many ion channels and transporters in the epithelial cells. The objective of this study was to map the sites of localization of ion channels ENaC and CFTR along the length of the mouse and rat epididymis using confocal microscopic imaging. The integrity of the fine structure of the tissues was verified by fluorescent phalloidin staining of actin filaments visualized by high-resolution confocal microscopy. The 2D and 3D images showed preservation of the stereocilia. Based on these images we determined morphometric parameters of the epithelial cells and ducts. ENaC and CFTR immunofluorescence appeared almost continuously on the apical membrane of caput and in smooth muscle myoid cells. In cauda, CFTR expression was observed continuously in long stretches of epithelium interrupted by clusters of cells that showed no CFTR expression. Similar patterns of localization were observed in both mouse and rat samples. Mutations in the CFTR gene are known to result in male infertility. Based on the widespread presence of ENaC along the epididymis we suggest that mutations in ENaC subunits may also be associated with male infertility. The diverse phenotypes associated with CFTR mutations may be due to malfunction of CFTR at specific subcellular locations in the male reproductive system.
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Affiliation(s)
- Sachin Sharma
- Laboratory of Cell Biology, Ariel University, 40700, Ariel, Israel
| | - Israel Hanukoglu
- Laboratory of Cell Biology, Ariel University, 40700, Ariel, Israel.
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5
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Wang YY, Chiang HS, Cheng CY, Wu YN, Lin YC, Liu HC, Tsai WK, Chen YL, Lin YH. SLC9A3 Protein Is Critical for Acrosomal Formation in Postmeiotic Male Germ Cells. Int J Mol Sci 2017; 19:ijms19010103. [PMID: 29286340 PMCID: PMC5796053 DOI: 10.3390/ijms19010103] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2017] [Revised: 12/13/2017] [Accepted: 12/19/2017] [Indexed: 01/07/2023] Open
Abstract
Solute carrier family 9 isoform 3 (SLC9A3), a Na+/H+ exchanger, regulates the transepithelial absorption of Na+ and water and is primarily expressed on the apical membranes of the intestinal epithelium, renal proximal tubule, epididymis, and vas deferens. Loss of the Slc9a3 allele in mice enhances intestinal fluid and causes diarrhoea as a consequence of diminished Na+ and HCO3− absorption. Hence, the loss also causes male infertility and reveals the abnormal dilated lumen of the rete testis and calcification in efferent ductules. However, whether loss of Slc9a3 alleles also disrupts mammalian spermatogenesis remains unknown. First, through immunoblotting, we determined that SLC9A3 is highly expressed in the murine testis compared with the small intestine, epididymis, and vas deferens. During murine spermatogenesis, SLC9A3 is specifically expressed in the acrosome region of round, elongating, and elongated spermatids through immunostaining. Furthermore, SLC9A3 signals are enriched in the acrosome of mature sperm isolated from the vas deferens. In Slc9a3 knockout (KO) mice, compared with the same-aged controls, the number of spermatids on the testicular section of the mice progressively worsened in mice aged 20, 35, and 60 days. Sperm isolated from the epididymis of Slc9a3 KO mice revealed severe acrosomal defects. Our data indicated that SLC9A3 has a vital role in acrosomal formation during spermiogenesis.
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Affiliation(s)
- Ya-Yun Wang
- Department of Chemistry, Fu Jen Catholic University, New Taipei City 242, Taiwan.
| | - Han-Sun Chiang
- Graduate Institute of Biomedical and Pharmaceutical Science, Fu Jen Catholic University, New Taipei City 242, Taiwan.
| | - Chiao-Yin Cheng
- Graduate Institute of Biomedical and Pharmaceutical Science, Fu Jen Catholic University, New Taipei City 242, Taiwan.
| | - Yi-No Wu
- School of Medicine, Fu Jen Catholic University, New Taipei City 242, Taiwan.
| | - Yung-Chih Lin
- Graduate Institute of Biomedical and Pharmaceutical Science, Fu Jen Catholic University, New Taipei City 242, Taiwan.
| | - Hsuan-Che Liu
- Graduate Institute of Biomedical and Pharmaceutical Science, Fu Jen Catholic University, New Taipei City 242, Taiwan.
| | - Wei-Kung Tsai
- Department of Urology, Mackay Memorial Hospital, Taipei 104, Taiwan.
| | - Yen-Lin Chen
- Department of Chemistry, Fu Jen Catholic University, New Taipei City 242, Taiwan.
- Department of Pathology, Cardinal Tien Hospital, New Taipei City 242, Taiwan.
| | - Ying-Hung Lin
- Graduate Institute of Biomedical and Pharmaceutical Science, Fu Jen Catholic University, New Taipei City 242, Taiwan.
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6
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Veys KR, D'Hauwers KW, van Dongen AJCM, Janssen MC, Besouw MTP, Goossens E, van den Heuvel LP, Wetzels AAMM, Levtchenko EN. First Successful Conception Induced by a Male Cystinosis Patient. JIMD Rep 2017; 38:1-6. [PMID: 28405942 DOI: 10.1007/8904_2017_19] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/03/2017] [Revised: 03/06/2017] [Accepted: 03/09/2017] [Indexed: 12/17/2022] Open
Abstract
Cystinosis is a rare autosomal recessive lysosomal storage disease characterized by multi-organ cystine accumulation, leading to renal failure and extra-renal organ dysfunction. Azoospermia of unknown origin is the main cause of infertility in all male cystinosis patients. Although spermatogenesis has shown to be intact at the testicular level in some patients, no male cystinosis patient has been reported yet to have successfully induced conception.We present the first successful conception ever reported, induced by a 27-year-old male renal transplant infantile nephropathic cystinosis patient through percutaneous epididymal sperm aspiration (PESA) followed by intracytoplasmatic sperm injection (ICSI). After 36 weeks and 6 days of an uncomplicated pregnancy, a dichorial diamniotic (DCDA) twin was born with an appropriate weight for gestational age and in an apparently healthy status. Moreover, we demonstrate that the sperm of epididymal origin in selected male cystinosis patients can be viable for inducing successful conception.Our observation opens a new perspective in life for many male cystinosis patients whom nowadays have become adults, by showing that despite azoospermia fathering a child can be realized. In addition, our findings raise questions about the possibility of sperm cryopreservation at a young age in these patients.
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Affiliation(s)
- Koenraad R Veys
- Department of Pediatric Nephrology, University Hospitals Leuven, Herestraat 49, 3000, Leuven, Belgium. .,Department of Growth and Regeneration, Unit of Organ Systems, KU Leuven, Herestraat 49, 3000, Leuven, Belgium.
| | - Kathleen W D'Hauwers
- Department of Urology, Radboud University Medical Center, Philips van Leydenlaan 15, 6562 EX, Nijmegen, The Netherlands
| | - Angelique J C M van Dongen
- Department of Gynaecology, Radboud University Medical Center, Philips van Leydenlaan 15, 6562 EX, Nijmegen, The Netherlands
| | - Mirian C Janssen
- Department of Internal Medicine, Unit of Metabolic Diseases, Radboud University Medical Center, Philips van Leydenlaan 15, 6562 EX, Nijmegen, The Netherlands
| | - Martine T P Besouw
- Department of Growth and Regeneration, Unit of Organ Systems, KU Leuven, Herestraat 49, 3000, Leuven, Belgium
| | - Ellen Goossens
- Department of Reproduction, Biology of the Testis, Genetics and Regenerative Medicine, Vrije Universiteit Brussel, Laarbeeklaan 103, 1090, Brussels, Belgium
| | - Lambert P van den Heuvel
- Department of Growth and Regeneration, Unit of Organ Systems, KU Leuven, Herestraat 49, 3000, Leuven, Belgium
| | - Alex A M M Wetzels
- Department of Fertility, Radboud University Medical Center, Philips van Leydenlaan 15, 6562 EX, Nijmegen, The Netherlands
| | - Elena N Levtchenko
- Department of Pediatric Nephrology, University Hospitals Leuven, Herestraat 49, 3000, Leuven, Belgium.,Department of Growth and Regeneration, Unit of Organ Systems, KU Leuven, Herestraat 49, 3000, Leuven, Belgium
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7
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Wang YY, Lin YH, Wu YN, Chen YL, Lin YC, Cheng CY, Chiang HS. Loss of SLC9A3 decreases CFTR protein and causes obstructed azoospermia in mice. PLoS Genet 2017; 13:e1006715. [PMID: 28384194 PMCID: PMC5398719 DOI: 10.1371/journal.pgen.1006715] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2016] [Revised: 04/20/2017] [Accepted: 03/24/2017] [Indexed: 01/21/2023] Open
Abstract
Mutations in the cystic fibrosis transmembrane conductance regulator (CFTR) gene cause cystic fibrosis (CF) and are associated with congenital bilateral absence of the vas deferens (CBAVD), which is the major cause of infertility in male patients with CF. However, most Taiwanese patients with CBAVD do not carry major CFTR mutations. Some patients have a single copy deletion of the solute carrier family 9 isoform 3 (SLC9A3) gene. SLC9A3 is a Na+/H+ exchanger, and depleted Slc9a3 in male mice causes infertility due to the abnormal dilated lumen of the rete testis and efferent ductules. Furthermore, SLC9A3 interacts with CFTR in the pancreatic duct and functions as a genetic modifier of CF. However, SLC9A3 function and its relation to CFTR expression in the male reproductive tract in vivo remain elusive. In the present study, we found that CFTR expression was dramatically decreased in the epididymis and vas deferens of Slc9a3 knockout mice. Adult Slc9a3-/- mice showed not only significantly decreased epididymis and vas deferens weight but also increased testis weight. Furthermore, Slc9a3-/- mice developed obstructive azoospermia because of abnormal abundant secretions and calcification in the lumen of the reproductive tract. Ultrastructural analysis of the epithelium in Slc9a3–/–epididymis and vas deferens displayed disorganized and reduced number of stereocilia and numerous secretory apparatuses. Our data revealed that interdependence between SLC9A3 and CFTR is critical for maintaining a precise microenvironment in the epithelial cytoarchitecture of the male reproductive tract. The Slc9a3-deficient mice with impaired male excurrent ducts in this study provide proof for our clinical findings that some Taiwanese of CBAVD carry SLC9A3 deletion but without major CFTR mutations. Cystic fibrosis (CF) is the most common inherited life-threatening disease in Caucasians. The most well-known cause of CF is a genetic defect in CFTR, an apical membrane chloride and bicarbonate channel. The symptoms of CF include defects in the respiratory, digestive, and male reproductive systems. Most male patients with CF are infertile due to congenital bilateral absence of the vas deferens (CBAVD), which leads to obstructive azoospermia. Nevertheless, Taiwanese patients with CBAVD do not carry the common mutations of CFTR found in Caucasians. We have identified a potential candidate, SLC9A3, of which a single copy is lost in Taiwanese patients with CBAVD. In addition to the previously reported role of SLC9A3 in the digestive system and efferent ductules, we now report that the SLC9A3 deficiency causes obstructive azoospermia and impairs the epithelial structure of the reproductive tract. Loss of SLC9A3 also leads to dramatic reduced expression of CFTR in the reproductive tract. We suggest that the interplay between SLC9A3 and CFTR is responsible for CF-related infertility. Thus, we have characterized a potential critical player in the pathogenesis of CBAVD and provide a new diagnostic candidate for Asian patients with CBAVD.
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Affiliation(s)
- Ya-Yun Wang
- Department of Chemistry, Fu Jen Catholic University, New Taipei City, Taiwan
- Graduate Institute of Biomedical and Pharmaceutical Science, Fu Jen Catholic University, New Taipei City, Taiwan
| | - Ying-Hung Lin
- Graduate Institute of Biomedical and Pharmaceutical Science, Fu Jen Catholic University, New Taipei City, Taiwan
| | - Yi-No Wu
- Graduate Institute of Biomedical and Pharmaceutical Science, Fu Jen Catholic University, New Taipei City, Taiwan
| | - Yen-Lin Chen
- Department of Chemistry, Fu Jen Catholic University, New Taipei City, Taiwan
- Graduate Institute of Biomedical and Pharmaceutical Science, Fu Jen Catholic University, New Taipei City, Taiwan
- Department of Pathology, Cardinal Tien Hospital, New Taipei City, Taiwan
| | - Yung-Chih Lin
- Graduate Institute of Biomedical and Pharmaceutical Science, Fu Jen Catholic University, New Taipei City, Taiwan
| | - Chiao-Yin Cheng
- Graduate Institute of Biomedical and Pharmaceutical Science, Fu Jen Catholic University, New Taipei City, Taiwan
| | - Han-Sun Chiang
- Graduate Institute of Biomedical and Pharmaceutical Science, Fu Jen Catholic University, New Taipei City, Taiwan
- Department of Urology, Taipei Medical University Hospital, Taipei, Taiwan
- * E-mail:
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8
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Wandernoth PM, Mannowetz N, Szczyrba J, Grannemann L, Wolf A, Becker HM, Sly WS, Wennemuth G. Normal Fertility Requires the Expression of Carbonic Anhydrases II and IV in Sperm. J Biol Chem 2015; 290:29202-16. [PMID: 26487715 PMCID: PMC4705926 DOI: 10.1074/jbc.m115.698597] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2015] [Indexed: 12/20/2022] Open
Abstract
HCO3 (-) is a key factor in the regulation of sperm motility. High concentrations of HCO3 (-) in the female genital tract induce an increase in sperm beat frequency, which speeds progress of the sperm through the female reproductive tract. Carbonic anhydrases (CA), which catalyze the reversible hydration of CO2 to HCO3 (-), represent potential candidates in the regulation of the HCO3 (-) homeostasis in sperm and the composition of the male and female genital tract fluids. We show that two CA isoforms, CAII and CAIV, are distributed along the epididymal epithelium and appear with the onset of puberty. Expression analyses reveal an up-regulation of CAII and CAIV in the different epididymal sections of the knockout lines. In sperm, we find that CAII is located in the principal piece, whereas CAIV is present in the plasma membrane of the entire sperm tail. CAII and CAIV single knockout animals display an imbalanced HCO3 (-) homeostasis, resulting in substantially reduced sperm motility, swimming speed, and HCO3 (-)-enhanced beat frequency. The CA activity remaining in the sperm of CAII- and CAIV-null mutants is 35% and 68% of that found in WT mice. Sperm of the double knockout mutant mice show responses to stimulus by HCO3 (-) or CO2 that were delayed in onset and reduced in magnitude. In comparison with sperm from CAII and CAIV double knockout animals, pharmacological loss of CAIV in sperm from CAII knockout animals, show an even lower response to HCO3 (-). These results suggest that CAII and CAIV are required for optimal fertilization.
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Affiliation(s)
- Petra M Wandernoth
- From the Institute of Anatomy, University Hospital, University Duisburg-Essen, Hufelandstraße 55, 45122 Essen, Germany
| | - Nadja Mannowetz
- From the Institute of Anatomy, University Hospital, University Duisburg-Essen, Hufelandstraße 55, 45122 Essen, Germany
| | - Jaroslaw Szczyrba
- From the Institute of Anatomy, University Hospital, University Duisburg-Essen, Hufelandstraße 55, 45122 Essen, Germany
| | - Laura Grannemann
- From the Institute of Anatomy, University Hospital, University Duisburg-Essen, Hufelandstraße 55, 45122 Essen, Germany
| | - Anne Wolf
- the Department of Internal Medicine I, Saarland University Medical Center, Kirrberger Straße, 66421 Homburg/Saar, Germany
| | - Holger M Becker
- the Division of Zoology/Membrane Transport, Department of Biology, University of Kaiserslautern, Erwin-Schrödinger-Straße 13, 67663 Kaiserslautern, Germany, and
| | - William S Sly
- the Edward A. Doisy Department of Biochemistry and Molecular Biology, St. Louis University School of Medicine, St. Louis, Missouri 63104
| | - Gunther Wennemuth
- From the Institute of Anatomy, University Hospital, University Duisburg-Essen, Hufelandstraße 55, 45122 Essen, Germany,
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9
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Xu H, Chen H, Li J, Zhao Y, Ghishan FK. Disruption of NHE8 expression impairs Leydig cell function in the testes. Am J Physiol Cell Physiol 2014; 308:C330-8. [PMID: 25472965 DOI: 10.1152/ajpcell.00289.2014] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Multiple sodium/hydrogen exchanger (NHE) isoforms are expressed in the testes, and they play various roles in cell volume regulation, intracellular pH regulation, and fluid absorption. NHE8, the most recently characterized NHE family member, is detected in the Leydig cells in humans and mice in great abundance by immunohistochemistry in the current study. Male mice lacking NHE8 expression were infertile. Despite having intact male reproductive organs, male NHE8-/- mice have smaller testes and lacked spermatozoon in the seminiferous tubules and the epididymis. At the age of 39 wk, few spermogonia were seen in the testis in NHE8-/- mice. Although male NHE8-/- mice have normal serum levels of luteinizing hormone and follicle-stimulating hormone, serum testosterone level was significantly reduced. These mice have decreased expression of luteinizing hormone receptor in the testes. In NHE8 small-interfering RNA-transfected mouse Leydig cells (MLTC-1), silencing of NHE8 decreased the expression of luteinizing hormone receptor by ∼70%. Moreover, loss of NHE8 function in Leydig cells resulted in disorganized luteinizing hormone receptor membrane distribution. Therefore, male infertility in NHE8-/- mice is at least partially due to the disruption of luteinizing hormone receptor distribution and consequent low testosterone production, which leads to Sertoli cell dysfunction. Our work identified a novel role of NHE8 in male fertility through its effect on modifying luteinizing hormone receptor function.
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Affiliation(s)
- Hua Xu
- Department of Pediatrics, Steel Children's Research Center, The University of Arizona, Tucson, Arizona
| | - Huacong Chen
- Department of Pediatrics, Steel Children's Research Center, The University of Arizona, Tucson, Arizona
| | - Jing Li
- Department of Pediatrics, Steel Children's Research Center, The University of Arizona, Tucson, Arizona
| | - Yang Zhao
- Department of Pediatrics, Steel Children's Research Center, The University of Arizona, Tucson, Arizona
| | - Fayez K Ghishan
- Department of Pediatrics, Steel Children's Research Center, The University of Arizona, Tucson, Arizona
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10
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Klein DM, Wright SH, Cherrington NJ. Xenobiotic transporter expression along the male genital tract. Reprod Toxicol 2014; 47:1-8. [PMID: 24814985 DOI: 10.1016/j.reprotox.2014.04.009] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2014] [Revised: 04/11/2014] [Accepted: 04/29/2014] [Indexed: 12/18/2022]
Abstract
The male genital tract plays an important role in protecting sperm by forming a distinct compartment separate from the body which limits exposure to potentially toxic substrates. Transporters along this tract can influence the distribution of xenobiotics into the male genital tract through efflux back into the blood or facilitating the accumulation of toxicants. The aim of this study was to quantitatively determine the constitutive mRNA expression of 30 xenobiotic transporters in caput and cauda regions of the epididymis, vas deferens, prostate, and seminal vesicles from adult Sprague-Dawley rats. The epididymis was found to express at least moderate levels of 18 transporters, vas deferens 15, seminal vesicles 23, and prostate 18. Constitutive expression of these xenobiotic transporters in the male genital tract may provide insight into the xenobiotics that can potentially be transported into these tissues and may provide the molecular mechanism for site specific toxicity of select agents.
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Affiliation(s)
- David M Klein
- University of Arizona, Department of Pharmacology and Toxicology, Tucson, AZ 85721, United States
| | - Stephen H Wright
- University of Arizona, Department of Physiology, Tucson, AZ 85721, United States
| | - Nathan J Cherrington
- University of Arizona, Department of Pharmacology and Toxicology, Tucson, AZ 85721, United States.
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Kwekel JC, Forgacs AL, Williams KJ, Zacharewski TR. o-p′-DDT-mediated uterotrophy and gene expression in immature C57BL/6 mice and Sprague–Dawley rats. Toxicol Appl Pharmacol 2013; 273:532-41. [DOI: 10.1016/j.taap.2013.09.024] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2013] [Revised: 09/04/2013] [Accepted: 09/24/2013] [Indexed: 12/19/2022]
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12
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Alver A, İmamoğlu M, Menteşe A, Şentürk A, Bülbül SS, Kahraman C, Sümer A. Malondialdehyde and CA II autoantibody levels are elevated in children with undescended testes. World J Urol 2013; 32:209-13. [DOI: 10.1007/s00345-013-1129-9] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2012] [Accepted: 07/02/2013] [Indexed: 01/25/2023] Open
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Lin CC, Lin LY, Hsu HH, Thermes V, Prunet P, Horng JL, Hwang PP. Acid secretion by mitochondrion-rich cells of medaka (Oryzias latipes) acclimated to acidic freshwater. Am J Physiol Regul Integr Comp Physiol 2012; 302:R283-91. [DOI: 10.1152/ajpregu.00483.2011] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
In the present study, medaka embryos were exposed to acidified freshwater (pH 5) to investigate the mechanism of acid secretion by mitochondrion-rich (MR) cells in embryonic skin. With double or triple in situ hybridization/immunocytochemistry, the Na+/H+ exchanger 3 (NHE3) and H+-ATPase were localized in two distinct subtypes of MR cells. NHE3 was expressed in apical membranes of a major proportion of MR cells, whereas H+-ATPase was expressed in basolateral membranes of a much smaller proportion of MR cells. Gill mRNA levels of NHE3 and H+-ATPase and the two subtypes of MR cells in yolk sac skin were increased by acid acclimation; however, the mRNA level of NHE3 was remarkably higher than that of H+-ATPase. A scanning ion-selective electrode technique was used to measure H+, Na+, and NH4+ transport by individual MR cells in larval skin. Results showed that Na+ uptake and NH4+ excretion by MR cells increased after acid acclimation. These findings suggested that the NHE3/Rh glycoprotein-mediated Na+ uptake/NH4+ excretion mechanism plays a critical role in acidic equivalent (H+/NH4+) excretion by MR cells of the freshwater medaka.
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Affiliation(s)
- Chia-Cheng Lin
- Institute of Cellular and Organismic Biology, Academia Sinica, Taipei, Taiwan, Republic of China
| | - Li-Yih Lin
- Department of Life Science, National Taiwan Normal University, Taipei, Taiwan, Republic of China; and
| | - Hao-Hsuan Hsu
- Institute of Cellular and Organismic Biology, Academia Sinica, Taipei, Taiwan, Republic of China
| | - Violette Thermes
- Institut National de la Recherche Agronomique, Station Commune de Recherches en Ichtyophysiologie, Biodiversité et Environnement, Campus de Beaulieu, Rennes, France
| | - Patrick Prunet
- Institut National de la Recherche Agronomique, UR1037, SCRIBE, IFR140, Biogenouest, Rennes, France; and
| | - Jiun-Lin Horng
- Department of Anatomy, Taipei Medical University, Taipei, Taiwan, Republic of China
| | - Pung-Pung Hwang
- Institute of Cellular and Organismic Biology, Academia Sinica, Taipei, Taiwan, Republic of China
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