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Habibullah MM. The role of CFTR channel in female infertility. HUM FERTIL 2023; 26:1228-1237. [PMID: 36576330 DOI: 10.1080/14647273.2022.2161427] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2021] [Accepted: 03/06/2022] [Indexed: 12/29/2022]
Abstract
The cystic fibrosis transmembrane conductance regulator (CFTR) is a cAMP-activated trans-membrane ATP gated anion channel present in most epithelia, which transports chloride and bicarbonate ions across the apical membrane. Mutations in the CFTR protein are known to result in defective expression or function, notably the inhibition of chloride and bicarbonate transport. This can result in cystic fibrosis (CF), a disorder characterised by thickness of the mucus lining of the epithelial cells of the alimentary and respiratory tracts, sweat ducts and reproductive organs. As a consequence, there is a reduction in fluid transport at the apical surface. While the most devastating effect of CF is mortality, about 98% of men with CF are infertile, consequent of early blockage of or failure to develop the mesonephrotic ducts as well as the vas deferens. The effect of CF of female fertility is less well-understood. This review highlights the genetics and pathophysiology as well as the mechanism of action of CF on female infertility.
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Affiliation(s)
- Mahmoud M Habibullah
- Department of Medical Laboratory Technology, Faculty of Applied Medical Sciences, Jazan University, Jazan, Saudi Arabia
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2
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Salleh N, Ismail N, Nelli G, Myint K, Khaing SL. Changes in fluid composition and expression of ion channels in rat cervix during different phases of the estrus cycle. Biotech Histochem 2021; 97:53-66. [PMID: 33827344 DOI: 10.1080/10520295.2021.1899285] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022] Open
Abstract
We investigated changes in the composition of cervical fluid at different phases of the female rat reproductive cycle. Fluid was collected from the cervix of rats by direct cervical flushing and analyzed for changes in Na+ and Cl- content and osmolarity. Following sacrifice, the cervix was harvested and expressions of mRNA and protein for ENaCs, CFTR and AQPs were measured using qPCR and immunohistochemistry, respectively. Cervical fluid Na+ and Cl- content was high during estrus, but osmolarity was high during metestrus and diestrus. Expressions of CFTR, AQP-1 and AQP-2 in the cervix were high during estrus, but low during diestrus. Expression of ENaC (α, β, γ), AQP-5 and AQP-7 was high during metestrus and diestrus and low during estrus. Changes in expression of ion channels in the cervix could explain changes in cervical fluid composition during the estrus cycle phases that could affect female fertility.
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Affiliation(s)
- Naguib Salleh
- Department of Physiology, Faculty of Medicine, University of Malaya, Kuala Lumpur, Malaysia
| | - Nurain Ismail
- Department of Physiology, Faculty of Medicine, University of Malaya, Kuala Lumpur, Malaysia
| | - Giribabu Nelli
- Department of Physiology, Faculty of Medicine, University of Malaya, Kuala Lumpur, Malaysia
| | - Kyaimon Myint
- Department of Physiology, Faculty of Medicine, University of Malaya, Kuala Lumpur, Malaysia
| | - Si Lay Khaing
- Department of Obstetrics & Gynecology, Faculty of Medicine, University of Malaya, Kuala Lumpur, Malaysia.,Medical Education Department, University of Medicine, Yangon, Myanmar
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3
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What Is the Impact of Diet on Nutritional Diarrhea Associated with Gut Microbiota in Weaning Piglets: A System Review. BIOMED RESEARCH INTERNATIONAL 2019; 2019:6916189. [PMID: 31976326 PMCID: PMC6949732 DOI: 10.1155/2019/6916189] [Citation(s) in RCA: 56] [Impact Index Per Article: 11.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/11/2019] [Revised: 11/19/2019] [Accepted: 12/03/2019] [Indexed: 12/11/2022]
Abstract
Piglets experience severe growth challenges and diarrhea after weaning due to nutritional, social, psychological, environmental, and physiological changes. Among these changes, the nutritional factor plays a key role in postweaning health. Dietary protein, fibre, starch, and electrolyte levels are highly associated with postweaning nutrition diarrhea (PWND). In this review, we mainly discuss the high protein, fibre, resistant starch, and electrolyte imbalance in diets that induce PWND, with a focus on potential mechanisms in weaned piglets.
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4
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Xu JW, Gao DD, Peng L, Qiu ZE, Ke LJ, Zhu YX, Zhang YL, Zhou WL. The gasotransmitter hydrogen sulfide inhibits transepithelial anion secretion of pregnant mouse endometrial epithelium. Nitric Oxide 2019; 90:37-46. [PMID: 31175932 DOI: 10.1016/j.niox.2019.05.011] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2018] [Revised: 05/24/2019] [Accepted: 05/29/2019] [Indexed: 01/08/2023]
Abstract
Endometrial epithelium exhibits a robust ion transport activity required for dynamical regulation of uterine fluid environment and thus embryo implantation. However, there still lacks a thorough understanding of the ion transport processes and regulatory mechanism in peri-implantation endometrial epithelium. As a gaseous signaling molecule or gasotransmitter, hydrogen sulfide (H2S) regulates a myriad of cellular and physiological processes in various tissues, including the modulation of ion transport proteins in epithelium. This study aimed to investigate the effects of H2S on ion transport across mouse endometrial epithelium and its possible role in embryo implantation. The existence of endogenous H2S in pregnant mouse uterus was tested by the detection of two key H2S-generating enzymes and measurement of H2S production rate in tissue homogenates. Transepithelial ion transport processes were electrophysiologically assessed in Ussing chambers on early pregnant mouse endometrial epithelial layers, demonstrating that H2S suppressed the anion secretion by blocking cystic fibrosis transmembrane conductance regulator (CFTR). H2S increased intracellular Cl- concentration ([Cl-]i) in mouse endometrial epithelial cells, which was abolished by pretreatment with the CFTR selective inhibitor CFTRinh-172. The cAMP level in mouse endometrial epithelial cells was not affected by H2S, indicating that H2S blocked CFTR in a cAMP-independent way. In vivo study showed that interference with H2S synthesis impaired embryo implantation. In conclusion, our study demonstrated that H2S inhibits the transepithelial anion secretion of early pregnant mouse endometrial epithelium via blockade of CFTR, contributing to the preparation for embryo implantation.
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Affiliation(s)
- Jia-Wen Xu
- School of Life Sciences, Sun Yat-sen University, 510006, No. 132, Waihuan Dong Road, Higher Education Mega Center, Guangzhou, China
| | - Dong-Dong Gao
- School of Life Sciences, Sun Yat-sen University, 510006, No. 132, Waihuan Dong Road, Higher Education Mega Center, Guangzhou, China
| | - Lei Peng
- School of Life Sciences, Sun Yat-sen University, 510006, No. 132, Waihuan Dong Road, Higher Education Mega Center, Guangzhou, China
| | - Zhuo-Er Qiu
- School of Life Sciences, Sun Yat-sen University, 510006, No. 132, Waihuan Dong Road, Higher Education Mega Center, Guangzhou, China
| | - Li-Jiao Ke
- School of Life Sciences, Sun Yat-sen University, 510006, No. 132, Waihuan Dong Road, Higher Education Mega Center, Guangzhou, China
| | - Yun-Xin Zhu
- School of Life Sciences, Sun Yat-sen University, 510006, No. 132, Waihuan Dong Road, Higher Education Mega Center, Guangzhou, China
| | - Yi-Lin Zhang
- School of Life Sciences, Sun Yat-sen University, 510006, No. 132, Waihuan Dong Road, Higher Education Mega Center, Guangzhou, China.
| | - Wen-Liang Zhou
- School of Life Sciences, Sun Yat-sen University, 510006, No. 132, Waihuan Dong Road, Higher Education Mega Center, Guangzhou, China.
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5
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Sex-independent expression of chloride/formate exchanger Cfex (Slc26a6) in rat pancreas, small intestine, and liver, and male-dominant expression in kidneys. Arh Hig Rada Toksikol 2018; 69:286-303. [PMID: 30864378 DOI: 10.2478/aiht-2018-69-3157] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2018] [Accepted: 11/01/2018] [Indexed: 01/03/2023] Open
Abstract
Chloride/formate exchanger (CFEX; SLC26A6) mediates oxalate transport in various mammalian organs. Studies in Cfex knockout mice indicated its possible role in development of male-dominant hyperoxaluria and oxalate urolithiasis. Rats provide an important model for studying this pathophysiological condition, but data on Cfex (rCfex) localisation and regulation in their organs are limited. Here we applied the RT-PCR and immunochemical methods to investigate rCfex mRNA and protein expression and regulation by sex hormones in the pancreas, small intestine, liver, and kidneys from intact prepubertal and adult as well as gonadectomised adult rats treated with sex hormones. rCfex cDNA-transfected HEK293 cells were used to confirm the specificity of the commercial anti-CFEX antibody. Various biochemical parameters were measured in 24-h urine collected in metabolic cages. rCfex mRNA and related protein expression varied in all tested organs. Sex-independent expression of the rCfex protein was detected in pancreatic intercalated ducts (apical domain), small intestinal enterocytes (brush-border membrane; duodenum > jejunum > ileum), and hepatocytes (canalicular membrane). In kidneys, the rCfex protein was immunolocalised to the proximal tubule brush-border with segment-specific pattern (S1=S2<S3), and both rCfex mRNA and protein expression exhibited male-dominant sex differences driven by stimulatory effects of androgens after puberty. However, urinary oxalate excretion was unrelated to renal rCfex protein expression. While the effect of male-dominant expression of rCfex in renal proximal tubules on urine oxalate excretion remains unknown, its expression in the hepatocyte canalicular membrane may be a pathway of oxalate elimination via bile.
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Xie ZD, Guo YM, Ren MJ, Yang J, Wang SF, Xu TH, Chen LM, Liu Y. The Balance of [Formula: see text] Secretion vs. Reabsorption in the Endometrial Epithelium Regulates Uterine Fluid pH. Front Physiol 2018; 9:12. [PMID: 29422866 PMCID: PMC5788990 DOI: 10.3389/fphys.2018.00012] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2017] [Accepted: 01/05/2018] [Indexed: 12/26/2022] Open
Abstract
Uterine fluid contains a high concentration of HCO3- which plays an essential role in sperm capacitation and fertilization. In addition, the HCO3- concentration in uterine fluid changes periodically during the estrous cycle. It is well-known that the endometrial epithelium contains machineries involving the apical SLC26 family anion exchangers for secreting HCO3- into the uterine fluid. In the present study, we find for the first time that the electroneutral Na+/HCO3- cotransporter NBCn1 is expressed at the apical membrane of the endometrial epithelium. The protein abundance of the apical NBCn1 and that of the apical SLC26A4 and SLC26A6 are reciprocally regulated during the estrous cycle in the uterus. NBCn1 is most abundant at diestrus, whereas SLC26A4/A6 are most abundant at proestrus/estrus. In the ovariectomized mice, the expression of uterine NBCn1 is inhibited by β-estradiol, but stimulated by progesterone, whereas that of uterine SLC26A4/A6 is stimulated by β-estradiol. In vivo perfusion studies show that the endometrial epithelium is capable of both secreting and reabsorbing HCO3-. Moreover, the activity for HCO3- secretion by the endometrial epithelium is significantly higher at estrus than it is at diestrus. The opposite is true for HCO3- reabsorption. We conclude that the endometrial epithelium simultaneously contains the activity for HCO3- secretion involving the apical SLC26A4/A6 and the activity for HCO3- reabsorption involving the apical NBCn1, and that the acid-base homeostasis in the uterine fluid is regulated by the finely-tuned balance of the two activities.
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Affiliation(s)
- Zhang-Dong Xie
- Key Laboratory of Molecular Biophysics of Ministry of Education, Department of Biophysics and Molecular Physiology, School of Life Science and Technology, Huazhong University of Science and Technology, Wuhan, China
| | - Yi-Min Guo
- Key Laboratory of Molecular Biophysics of Ministry of Education, Department of Biophysics and Molecular Physiology, School of Life Science and Technology, Huazhong University of Science and Technology, Wuhan, China
| | - Mei-Juan Ren
- Key Laboratory of Molecular Biophysics of Ministry of Education, Department of Biophysics and Molecular Physiology, School of Life Science and Technology, Huazhong University of Science and Technology, Wuhan, China
| | - Jichun Yang
- Department of Physiology and Pathophysiology, School of Basic Medical Sciences, Peking University Health Science Center, Beijing, China
| | - Shao-Fang Wang
- Wuhan National Laboratory for Optoelectronics, Britton Chance Center for Biomedical Photonics, Huazhong University of Science and Technology, Wuhan, China
| | - Tong-Hui Xu
- Wuhan National Laboratory for Optoelectronics, Britton Chance Center for Biomedical Photonics, Huazhong University of Science and Technology, Wuhan, China
| | - Li-Ming Chen
- Key Laboratory of Molecular Biophysics of Ministry of Education, Department of Biophysics and Molecular Physiology, School of Life Science and Technology, Huazhong University of Science and Technology, Wuhan, China
| | - Ying Liu
- Key Laboratory of Molecular Biophysics of Ministry of Education, Department of Biophysics and Molecular Physiology, School of Life Science and Technology, Huazhong University of Science and Technology, Wuhan, China
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Zhou Y, Jiang H, Zhang WX, Ni F, Wang XM, Song XM. Ultrasound-guided aspiration of hydrosalpinx occurring during controlled ovarian hyperstimulation could improve clinical outcome of in vitro fertilization-embryo transfer. J Obstet Gynaecol Res 2016; 42:960-5. [PMID: 27079131 DOI: 10.1111/jog.13013] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2015] [Revised: 02/02/2016] [Accepted: 02/26/2016] [Indexed: 11/29/2022]
Abstract
AIM To investigate whether aspiration of hydrosalpinx during oocyte retrieval could improve the clinical outcome of in vitro fertilization-embryo transfer (IVF-ET). METHODS The clinical data of 598 IVF-ET cycles with tubal factor infertility at Reproductive Medical Center, 105 Hospital of People's Liberation Army, Anhui, China, between March 2011 and July 2015 were analyzed in this retrospective study. Among them, 71 cycles with unilateral or bilateral hydrosalpinx confirmed on both hysterosalpingography (HSG) and ultrasonography before controlled ovarian hyperstimulation (COH) were assigned to group A. A total of 51 cycles with unilateral or bilateral hydrosalpinx occurring during COH and confirmed on ultrasonography were assigned to group B. In both group A and group B, ultrasound-guided hydrosalpinx aspiration was performed in all patients when oocyte retrieval was finished. A further 35 cycles with unilateral or bilateral hydrosalpinx during COH received no intervention and were assigned to group C. A total of 441 cycles without hydrosalpinx on HSG or on ultrasonography before or during COH served as the control (group D). The IVF-ET outcomes of the four groups were analyzed and compared. RESULTS The embryo implantation rate and clinical pregnancy rate in group A and group C were significantly lower than those in group B and group D. The ongoing pregnancy rate in group A was significantly lower than that in group B and group D, and the ongoing pregnancy rate in group C was significantly lower than that in group D. CONCLUSION Aspiration of hydrosalpinx occurring during COH could significantly improve the clinical outcomes of IVF-ET, but not for the hydrosalpinx occurring before COH.
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Affiliation(s)
- Yun Zhou
- Reproductive Medicine Center, Clinical College of People's Liberation Army Affiliated to Anhui Medical University, Hefei, Anhui, China.,Reproductive Medicine Center, 105 Hospital of People's Liberation Army, Hefei, Anhui, China
| | - Hong Jiang
- Reproductive Medicine Center, Clinical College of People's Liberation Army Affiliated to Anhui Medical University, Hefei, Anhui, China.,Reproductive Medicine Center, 105 Hospital of People's Liberation Army, Hefei, Anhui, China
| | - Wen-Xiang Zhang
- Reproductive Medicine Center, Clinical College of People's Liberation Army Affiliated to Anhui Medical University, Hefei, Anhui, China.,Reproductive Medicine Center, 105 Hospital of People's Liberation Army, Hefei, Anhui, China
| | - Feng Ni
- Reproductive Medicine Center, Clinical College of People's Liberation Army Affiliated to Anhui Medical University, Hefei, Anhui, China.,Reproductive Medicine Center, 105 Hospital of People's Liberation Army, Hefei, Anhui, China
| | - Xue-Mei Wang
- Reproductive Medicine Center, Clinical College of People's Liberation Army Affiliated to Anhui Medical University, Hefei, Anhui, China.,Reproductive Medicine Center, 105 Hospital of People's Liberation Army, Hefei, Anhui, China
| | - Xiao-Min Song
- Reproductive Medicine Center, Clinical College of People's Liberation Army Affiliated to Anhui Medical University, Hefei, Anhui, China.,Reproductive Medicine Center, 105 Hospital of People's Liberation Army, Hefei, Anhui, China
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8
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Testosterone regulates levels of cystic fibrosis transmembrane regulator, adenylate cyclase, and cAMP in the seminal vesicles of orchidectomized rats. Theriogenology 2015; 85:238-46. [PMID: 26483308 DOI: 10.1016/j.theriogenology.2015.09.036] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2015] [Revised: 09/14/2015] [Accepted: 09/15/2015] [Indexed: 12/12/2022]
Abstract
Secretions of chloride (Cl(-))- and bicarbonate (HCO3(-))-rich fluid by the seminal vesicles could involve cystic fibrosis transmembrane regulator (CFTR), which activity can be stimulated by cAMP generated from the reaction involving adenylate cyclase (AC). In this study, we investigated levels of CFTR, AC, and cAMP in the seminal vesicles under testosterone influence. Orchidectomized adult male rats received 7-day treatment with 125 or 250 μg/kg/day of testosterone with or without flutamide or finasteride. At the end of the treatment, animals were sacrificed and seminal vesicles were harvested for analyses of CFTR and AC protein expression level by Western blotting. Distribution of CFTR and AC in seminal vesicles was observed by immunohistochemistry. Levels of cAMP and dihydrotestosterone in seminal vesicle homogenates were measured by ELISA. Cystic fibrosis transmembrane regulator, AC, and cAMP levels increased with increasing doses of testosterone (P < 0.05 compared to nontreated orchidectomized rats). Cystic fibrosis transmembrane regulator and AC were expressed at the apical membrane of the epithelium lining the seminal vesicle lumen with higher expression levels observed in testosterone-treated rats than in non-treated orchidectomized rats (P < 0.05). The inhibitory effects of flutamide or finasteride on these parameters were greater in 250 μg/kg/day testosterone-treated rats than their effects in 125 μg/kg/day testosterone-treated rats. Higher dihydrotestosterone levels were observed in seminal vesicle homogenates after treatment with 250 μg/kg/day than with 125 μg/kg/day of testosterone (P < 0.05). Increased levels of CFTR, AC, and cAMP in seminal vesicles might contribute toward an increase in Cl(-) and HCO3(-) concentrations in the seminal fluid as reported under testosterone influence.
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9
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Mohd Mokhtar H, Giribabu N, Kassim N, Muniandy S, Salleh N. Testosterone decreases fluid and chloride secretions in the uterus of adult female rats via down-regulating cystic fibrosis transmembrane regulator (CFTR) expression and functional activity. J Steroid Biochem Mol Biol 2014; 144 Pt B:361-72. [PMID: 25125390 DOI: 10.1016/j.jsbmb.2014.08.007] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/07/2014] [Revised: 07/14/2014] [Accepted: 08/07/2014] [Indexed: 12/15/2022]
Abstract
OBJECTIVES Estrogen is known to stimulate uterine fluid and Cl(-) secretion via CFTR. This study investigated testosterone effect on these changes in a rat model. METHODS Ovariectomized adult female rats received estrogen for five days or estrogen for three days followed by two days peanut oil or testosterone either alone or in the presence of flutamide or finasteride. At the end of treatment, uteri were perfused with perfusate containing CFTRinh-172. The rate of fluid and Cl(-) secretion were determined. Dose-dependent effect of testosterone and effect of forskolin on fluid secretion rate were measured. Animals were sacrificed and uteri were removed for CFTR protein and mRNA expression analyses, histology and cAMP measurement. Morphology of uterus, levels of expression of CFTR protein and mRNA and distribution of CFTR protein were observed. RESULTS Estrogen causes increase while testosterone causes decrease in uterine fluid and Cl(-) secretions. The effects of estrogen but not testosterone were antagonized by CFTRinh-172. Luminal fluid volume and apical expression of CFTR in the luminal epithelia were highest under estrogen and lowest under testosterone influences. Similar changes were observed in CFTR protein and mRNA expressions. Uterine cAMP level was highest under estrogen and lowest under testosterone influence. Forskolin increases fluid secretion rate in estrogen but not in testosterone-treated animals. Testosterone effects were dose-dependent and were antagonized by flutamide however, not finasteride. CONCLUSIONS Testosterone inhibition of estrogen-induced uterine fluid and Cl(-) secretion occurs via inhibition of CFTR expression and functional activities. These changes could explain the adverse effects of testosterone on fertility.
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Affiliation(s)
- Helmy Mohd Mokhtar
- Department of Physiology, Faculty of Medicine, University of Malaya, Kuala Lumpur 50603, Malaysia
| | - Nelli Giribabu
- Department of Physiology, Faculty of Medicine, University of Malaya, Kuala Lumpur 50603, Malaysia
| | - Normadiah Kassim
- Department of Anatomy, Faculty of Medicine, University of Malaya, Kuala Lumpur 50603, Malaysia
| | - Sekaran Muniandy
- Department of Molecular Medicine, Faculty of Medicine, University of Malaya, Kuala Lumpur 50603, Malaysia
| | - Naguib Salleh
- Department of Physiology, Faculty of Medicine, University of Malaya, Kuala Lumpur 50603, Malaysia.
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10
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Yuan DZ, Yu LL, Qu T, Zhang SM, Zhao YB, Pan JL, Xu Q, He YP, Zhang JH, Yue LM. Identification and characterization of progesterone- and estrogen-regulated MicroRNAs in mouse endometrial epithelial cells. Reprod Sci 2014; 22:223-34. [PMID: 24925854 DOI: 10.1177/1933719114537714] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
In endometrial epithelial cells, progesterone (P4) functions in regulating the cell structure and opposing the effects of estrogen. However, the mechanisms of P4 that oppose the effects of estrogen remain unclear. MicroRNAs (miRNAs) are important posttranscriptional regulators that are involved in various physiological and pathological processes. Whether P4 directly induces miRNA expression to antagonize estrogen in endometrial epithelium is unclear. In this study, total RNAs were extracted from endometrial epithelium of ovariectomized mice, which were treated with estrogen alone or a combination of estrogen and P4. MicroRNA high-throughput sequencing with bioinformatics analysis was used to identify P4-induced miRNAs, predict their potential target genes, and analyze their possible biological functions. We observed that 146 mature miRNAs in endometrial epithelial cells were significantly upregulated by P4. These miRNAs were extensively involved in multiple biological processes. The miRNA-145a demonstrated a possible function in the antiproliferative action of P4 on endometrial epithelial cells.
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Affiliation(s)
- Dong-zhi Yuan
- Department of Physiology, West China School of Preclinical and Forensic Medicine, Sichuan University, Chengdu, China
| | - Lin-lin Yu
- Department of Physiology, West China School of Preclinical and Forensic Medicine, Sichuan University, Chengdu, China
| | - Ting Qu
- Department of Physiology, West China School of Preclinical and Forensic Medicine, Sichuan University, Chengdu, China
| | - Shi-mao Zhang
- Department of Physiology, West China School of Preclinical and Forensic Medicine, Sichuan University, Chengdu, China
| | - You-bo Zhao
- Department of Physiology, West China School of Preclinical and Forensic Medicine, Sichuan University, Chengdu, China
| | - Jun-li Pan
- Department of Physiology, West China School of Preclinical and Forensic Medicine, Sichuan University, Chengdu, China
| | - Qian Xu
- Department of Physiology, West China School of Preclinical and Forensic Medicine, Sichuan University, Chengdu, China
| | - Ya-Ping He
- Department of Physiology, West China School of Preclinical and Forensic Medicine, Sichuan University, Chengdu, China
| | - Jin-hu Zhang
- Department of Physiology, West China School of Preclinical and Forensic Medicine, Sichuan University, Chengdu, China
| | - Li-min Yue
- Department of Physiology, West China School of Preclinical and Forensic Medicine, Sichuan University, Chengdu, China
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11
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Liu XM, Zhang D, Wang TT, Sheng JZ, Huang HF. Ion/Water Channels for Embryo Implantation Barrier. Physiology (Bethesda) 2014; 29:186-95. [PMID: 24789983 DOI: 10.1152/physiol.00039.2013] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023] Open
Abstract
Successful implantation involves three distinct processes, namely the embryo apposition, attachment, and penetration through the luminal epithelium of the endometrium to establish a vascular link to the mother. After penetration, stromal cells underlying the epithelium differentiate and surround the embryo to form the embryo implantation barrier, which blocks the passage of harmful substances to the embryo. Many ion/water channel proteins were found to be involved in the process of embryo implantation. First, ion/water channel proteins play their classical role in establishing a resting membrane potential, shaping action potentials and other electrical signals by gating the flow of ions across the cell membrane. Second, most of ion/water channel proteins are regulated by steroid hormone (estrogen or progesterone), which may have important implications to the embryo implantation. Last but not least, these proteins do not limit themselves as pure channels but also function as an initiator of a series of consequences once activated by their ligand/stimulator. Herein, we discuss these new insights in recent years about the contribution of ion/water channels to the embryo implantation barrier construction during early pregnancy.
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Affiliation(s)
- Xin-Mei Liu
- Key Laboratory of Reproductive Genetics (Zhejiang University), Ministry of Education of the People's Republic of China, People's Republic of China
- Department of Pathology & Pathophysiology, School of Medicine, Zhejiang University, People's Republic of China
| | - Dan Zhang
- Key Laboratory of Reproductive Genetics (Zhejiang University), Ministry of Education of the People's Republic of China, People's Republic of China
- Department of Reproductive Endocrinology, Women's Hospital, School of Medicine, Zhejiang University, People's Republic of China; and
| | - Ting-Ting Wang
- Key Laboratory of Reproductive Genetics (Zhejiang University), Ministry of Education of the People's Republic of China, People's Republic of China
- Department of Reproductive Endocrinology, Women's Hospital, School of Medicine, Zhejiang University, People's Republic of China; and
| | - Jian-Zhong Sheng
- Department of Pathology & Pathophysiology, School of Medicine, Zhejiang University, People's Republic of China
| | - He-Feng Huang
- Key Laboratory of Reproductive Genetics (Zhejiang University), Ministry of Education of the People's Republic of China, People's Republic of China
- Department of Reproductive Endocrinology, Women's Hospital, School of Medicine, Zhejiang University, People's Republic of China; and
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12
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Chinigarzadeh A, Kassim NM, Muniandy S, Salleh N. Genistein-induced fluid accumulation in ovariectomised rats' uteri is associated with increased cystic fibrosis transmembrane regulator expression. Clinics (Sao Paulo) 2014; 69:111-9. [PMID: 24519202 PMCID: PMC3912340 DOI: 10.6061/clinics/2014(02)07] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/25/2013] [Accepted: 07/18/2013] [Indexed: 01/19/2023] Open
Abstract
OBJECTIVE High genistein doses have been reported to induce fluid accumulation in the uteri of ovariectomised rats, although the mechanism underlying this effect remains unknown. Because genistein binds to the oestrogen receptor and the cystic fibrosis transmembrane regulator mediates uterine fluid secretion, we hypothesised that this genistein effect involves both the oestrogen receptor and cystic fibrosis transmembrane regulator. METHODS Ovariectomised adult female Sprague-Dawley rats were treated with 25, 50, or 100 mg/kg/day genistein for three consecutive days with and without the ER antagonist ICI 182780. One day after the final drug injection, the animals were humanely sacrificed, and the uteri were removed for histology and cystic fibrosis transmembrane regulator mRNA and protein expression analysis using real-time polymerase chain reaction and Western blotting, respectively. The cystic fibrosis transmembrane regulator protein distribution was analysed visually by immunohistochemistry. RESULTS The histological analysis revealed an increase in the circumference of the uterine lumen with increasing doses of genistein, which was suggestive of fluid accumulation. Moreover, genistein stimulated a dose-dependent increase in the expression of cystic fibrosis transmembrane regulator protein and mRNA, and high-intensity cystic fibrosis transmembrane regulator immunostaining was observed at the apical membrane of the luminal epithelium following 50 and 100 mg/kg/day genistein treatment. The genistein-induced increase in uterine luminal circumference and cystic fibrosis transmembrane regulator expression was antagonised by treatment with ICI 182780. CONCLUSION Genistein-induced luminal fluid accumulation in ovariectomised rats' uteri involves the oestrogen receptor and up-regulation of cystic fibrosis transmembrane regulator expression, and these findings reveal the mechanism underlying the effect of this compound on changes in fluid volume in the uterus after menopause.
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Affiliation(s)
- Asma Chinigarzadeh
- University of Malaya, Faculty of Medicine, Department of Physiology, Kuala Lumpur, Malaysia, University of Malaya, Faculty of Medicine, Department of Physiology, Kuala Lumpur/Malaysia
| | - Normadiah M Kassim
- University of Malaya, Faculty of Medicine, Department of Anatomy, Kuala Lumpur, Malaysia, University of Malaya, Faculty of Medicine, Department of Anatomy, Kuala Lumpur/Malaysia
| | - Sekaran Muniandy
- University of Malaya, Faculty of Medicine, Department of Molecular Medicine, Kuala Lumpur, Malaysia, University of Malaya, Faculty of Medicine, Department of Molecular Medicine, Kuala Lumpur/Malaysia
| | - Naguib Salleh
- University of Malaya, Faculty of Medicine, Department of Physiology, Kuala Lumpur, Malaysia, University of Malaya, Faculty of Medicine, Department of Physiology, Kuala Lumpur/Malaysia
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Gholami K, Muniandy S, Salleh N. Modulation of sodium-bicarbonate co-transporter (SLC4A4/NBCe1) protein and mRNA expression in rat's uteri by sex-steroids and at different phases of the oestrous cycle. Res Vet Sci 2013; 96:164-70. [PMID: 24295739 DOI: 10.1016/j.rvsc.2013.11.005] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2013] [Revised: 08/16/2013] [Accepted: 11/10/2013] [Indexed: 01/25/2023]
Abstract
UNLABELLED Oestrogen-induced uterine fluid sodium (Na(+)) and bicarbonate (HCO3(-)) secretion may involve SLC4A4. We hypothesized that uterine SLC4A4 expression changes under different sex-steroid influence, therefore may account for the fluctuation in uterine fluid Na(+) and HCO3(-) content throughout the oestrous cycle. The aim of this study is to investigate the differential effects of sex-steroids and oestrous cycle phases on uterine SLC4A4 expression. METHODS Adult female WKY rats were ovariectomised and treated with different doses of 17β-oestradiol (E2) (0.2, 2, 20 and 50 μg/ml/day) or progesterone (P4) (4 mg/ml/day) for three consecutive days and 3 days treatment with 0.2 μg/ml/day E2 followed by another 3 days with P4 to mimic the hormonal changes in early pregnancy. Oestrous cycle phases in intact, non-ovariectomised rats were determined by vaginal smear. The animals were then sacrificed and uteri were removed for protein and mRNA expression analyses by Western blotting and Real Time PCR, respectively. SLC4A4 distribution was observed by immunohistochemistry. RESULTS Treatment with increasing E2 doses resulted in a dose-dependent increase in SLC4A4 protein expression. High SLC4A4 protein and mRNA expression can be seen at estrus. SLC4A4 is distributed mainly at the apical as well as basolateral membranes of the luminal and glandular epithelia following E2 treatment and at Es. Meanwhile, SLC4A4 expression was reduced following P4 treatment and was low at diestrus. CONCLUSION High SLC4A4 expression under estrogen dominance may contribute to the increase in uterine fluid Na(+) and HCO3(-) content, while its low expression under P4 dominance may result in vice versa.
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Affiliation(s)
- Khadijeh Gholami
- Department of Molecular Medicine, Faculty of Medicine, University of Malaya, 50603 Kuala Lumpur, Malaysia
| | - Sekaran Muniandy
- Department of Molecular Medicine, Faculty of Medicine, University of Malaya, 50603 Kuala Lumpur, Malaysia
| | - Naguib Salleh
- Department of Physiology, Faculty of Medicine, University of Malaya, 50603 Kuala Lumpur, Malaysia.
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Chan HC, Sun X. SLC26 anion exchangers in uterine epithelial cells and spermatozoa: clues from the past and hints to the future. Cell Biol Int 2013; 38:1-7. [PMID: 24115633 DOI: 10.1002/cbin.10183] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2013] [Accepted: 08/15/2013] [Indexed: 12/27/2022]
Abstract
The solute carrier 26 (SLC26) family emerges as a distinct class of anion transporters with its members SLC26A3 (Slc26a3) and SLC26A6 (Slc26a6) reported to be electrogenic Cl(-)/HCO3(-) exchangers. While it is known that uterine fluid has high HCO3(-) content and that HCO3(-) is essential for sperm capacitation, the molecular mechanisms underlying the transport of HCO3(-) across uterine epithelial cells and sperm have not been fully investigated. The present review re-examines the results from early reports studying anion transport, finding clues for the involvement of Cl(-)/HCO3(-) anion exchangers in electrogenic HCO3(-) transport across endometrial epithelium. We also summarise recent work on Slc26a3 and Slc26a6 in uterine epithelial cells and sperm, revealing their functional role in working closely with the cystic fibrosis transmembrane conductance regulator (CFTR) for HCO3(-) transport in these cells. The possible involvement of these anion exchangers in other HCO3(-) dependent reproductive processes and their implications for infertility are also discussed.
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Affiliation(s)
- Hsiao Chang Chan
- Epithelial Cell Biology Research Center, School of Biomedical Sciences, Faculty of Medicine, The Chinese University of Hong Kong, Shatin, N.T., Hong Kong
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15
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Differential expression of Na+/H+-exchanger (NHE-1, 2, and 4) proteins and mRNA in rodent's uterus under sex steroid effect and at different phases of the oestrous cycle. BIOMED RESEARCH INTERNATIONAL 2013; 2013:840121. [PMID: 23509787 PMCID: PMC3582097 DOI: 10.1155/2013/840121] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/14/2012] [Accepted: 01/01/2013] [Indexed: 12/16/2022]
Abstract
Precise uterine fluid pH regulation may involve the Na+/H+-exchanger (NHE). We hypothesized that NHE isoforms are differentially expressed under different sex steroid treatment and at different oestrous cycle phases which may explain the uterine fluid pH changes observed under these conditions. Method. Oestrous cycle phases of intact WKY rats were identified by vaginal smear. Another group of rats was ovariectomized and treated with 0.2 μg 17β-oestradiol (E), 4 mg progesterone (P), and E followed by P (E + P). The animals were then sacrificed and the uteri were removed for mRNA and protein expression analyses by real-time PCR and western blotting, respectively. NHE isoforms distribution was detected by immunohistochemistry (IHC). Results. NHE-1 mRNA and protein were upregulated at diestrus (Ds) and following P treatment. Meanwhile, NHE-2 and NHE-4 proteins and mRNA were upregulated at proestrus (Ps) and estrus (Es) and following E treatment. NHE-1 was found predominantly at the apical membrane, while NHE-2 and NHE-4 were found at the apical and basolateral membranes of the luminal epithelia. NHE-4 is the main isoform upregulated by E. Conclusion. Differential expressions of uterine NHE isoforms 1, 2, and 4 could explain the observed changes in the uterine fluid pH under these conditions.
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Gholami K, Muniandy S, Salleh N. In-vivo functional study on the involvement of CFTR, SLC26A6, NHE-1 and CA isoenzymes II and XII in uterine fluid pH, volume and electrolyte regulation in rats under different sex-steroid influence. Int J Med Sci 2013; 10:1121-34. [PMID: 23869188 PMCID: PMC3714388 DOI: 10.7150/ijms.5918] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/20/2013] [Accepted: 05/30/2013] [Indexed: 01/13/2023] Open
Abstract
UNLABELLED Precise control of uterine fluid pH, volume and electrolytes is important for the reproductive processes. In this study, we examined the functional involvement of multiple proteins including Cystic Fibrosis Transmembrane Regulator (CFTR), Cl(-)/HCO3 (-) exchanger (SLC26A6), sodium-hydrogen exchanger-1 (NHE-1) and carbonic anhydrase (CA) in the regulation of these uterine fluid parameters. METHODS Adult female WKY rats were divided into intact, non-ovariectomised at different oestrous cycle phases and ovariectomised treated with sex-steroids. Following oestrous phase identification or sex-steroid treatment, in-vivo uterine perfusion was performed with and without the presence of these inhibitors: glibenclamide, DIDS, ACTZ and EIPA. The pH, volume, Cl(-), HCO3 (-) and Na(+) concentrations of the perfusate from different groups were then analyzed. Meanwhile, the expression of CFTR, SLC26A6, NHE-1, CAII and CAXII was visualized by immunohistochemistry (IHC). RESULTS Parallel increase in the pH, volume, Cl(-), HCO3 (-) and Na(+) concentrations was observed at estrus (Es), proestrus (Ps) and following 17β-oestradiol (E) treatment, which was inhibited by glibenclamide, DIDS and ACTZ while parallel reduction in these parameters was observed at diestrus (Ds) and following progesterone (P) treatment which was inhibited by ACTZ and EIPA. CFTR and SLC26A6 expression were up-regulated under E dominance, while NHE-1 expression was up-regulated under P dominance. Meanwhile, CA isoenzymes were expressed under both E and P influence. CONCLUSION CFTR, SLC26A6 and CA were involved in mediating parallel increase in the uterine fluid volume, pH and electrolyte concentration under E while NHE and CA were involved in mediating the reduction of these parameters under P.
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Affiliation(s)
- Khadijeh Gholami
- Dept of Molecular Medicine, Faculty of Medicine, University of Malaya, 50603 Kuala Lumpur, Malaysia
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