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Liu L, Mao S, Chen K, Dai J, Jin S, Chen L, Wang Y, Guo L, Yang Y, Zhan C, Xiong Z, Diao H, Zhou Y, Ding Q, Wang X. Membrane-Bound EMC10 Is Required for Sperm Motility via Maintaining the Homeostasis of Cytoplasm Sodium in Sperm. Int J Mol Sci 2022; 23:ijms231710069. [PMID: 36077468 PMCID: PMC9456234 DOI: 10.3390/ijms231710069] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2022] [Revised: 08/31/2022] [Accepted: 09/01/2022] [Indexed: 11/16/2022] Open
Abstract
Endoplasmic reticulum membrane protein complex subunit 10 (EMC10) is an evolutionarily conserved and multifunctional factor across species. We previously reported that Emc10 knockout (KO) leads to mouse male infertility. Emc10-null spermatozoa exhibit multiple aspects of dysfunction, including reduced sperm motility. Two subunits of a Na/K-ATPase, ATP1A4 and ATP1B3, are nearly absent in Emc10 KO spermatozoa. Here, two isoforms of EMC10 were characterized in the mouse testis and epididymis: the membrane-bound (mEMC10) and secreted (scEMC10) isoforms. We present evidence that mEMC10, rather than scEMC10, is required for cytoplasm sodium homeostasis by positively regulating ATP1B3 expression in germ cells. Intra-testis mEMC10 overexpression rescued the sperm motility defect caused by Emc10 KO, while exogenous recombinant scEMC10 protein could not improve the motility of spermatozoa from either Emc10 KO mouse or asthenospermic subjects. Clinically, there is a positive association between ATP1B3 and EMC10 protein levels in human spermatozoa, whereas no correlation was proven between seminal plasma scEMC10 levels and sperm motility. These results highlight the important role of the membrane-bound EMC10 isoform in maintaining cytoplasm sodium homeostasis and sperm motility. Based on the present results, the mEMC10-Na, K/ATPase α4β3 axis is proposed as a novel mechanism underlying the regulation of cytoplasmic sodium and sperm motility, and its components seem to have therapeutic potential for asthenospermia.
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Affiliation(s)
- Lijie Liu
- Department of Urology, Huashan Hospital, Fudan University, Shanghai 200040, China
| | - Shanhua Mao
- Department of Urology, Huashan Hospital, Fudan University, Shanghai 200040, China
| | - Kuangyang Chen
- Department of Endocrinology, Huashan Hospital, Fudan University, Shanghai 200040, China
| | - Jiarong Dai
- Department of Endocrinology, Huashan Hospital, Fudan University, Shanghai 200040, China
| | - Shuoshuo Jin
- Department of Endocrinology, Huashan Hospital, Fudan University, Shanghai 200040, China
| | - Lijiao Chen
- Department of Endocrinology, Huashan Hospital, Fudan University, Shanghai 200040, China
| | - Yahao Wang
- Department of Endocrinology, Huashan Hospital, Fudan University, Shanghai 200040, China
| | - Lina Guo
- NHC Key Laboratory of Reproduction Regulation (Shanghai Institute for Biomedical and Pharmaceutical Technologies), School of Basic Medical Sciences, Fudan University, Shanghai 200032, China
| | - Yiting Yang
- NHC Key Laboratory of Reproduction Regulation (Shanghai Institute for Biomedical and Pharmaceutical Technologies), School of Basic Medical Sciences, Fudan University, Shanghai 200032, China
| | - Chongwen Zhan
- Department of General Surgery, Huashan Hospital, Fudan University, Shanghai 200040, China
| | - Zuquan Xiong
- Department of Urology, Huashan Hospital, Fudan University, Shanghai 200040, China
| | - Hua Diao
- NHC Key Laboratory of Reproduction Regulation (Shanghai Institute for Biomedical and Pharmaceutical Technologies), School of Basic Medical Sciences, Fudan University, Shanghai 200032, China
| | - Yuchuan Zhou
- Shanghai Key Laboratory of Embryo Original Diseases, The International Peace Maternity and Child Health Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai 200030, China
| | - Qiang Ding
- Department of Urology, Huashan Hospital, Fudan University, Shanghai 200040, China
| | - Xuanchun Wang
- Department of Endocrinology, Huashan Hospital, Fudan University, Shanghai 200040, China
- Correspondence: ; Tel.: +86-21-5288-8286
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Agalakova NI, Reznik VA, Ershov IA, Lupanova EA, Nadei OV, Ivanov DO, David Adair C, Bagrov AY. Silencing of Fli1 Gene Mimics Effects of Preeclampsia and Induces Collagen Synthesis in Human Umbilical Arteries. Am J Hypertens 2022; 35:828-832. [PMID: 35569064 DOI: 10.1093/ajh/hpac065] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2021] [Revised: 02/27/2022] [Accepted: 05/13/2022] [Indexed: 02/02/2023] Open
Abstract
BACKGROUND Previously we demonstrated that in patients with preeclampsia elevated levels of endogenous Na/K-ATPase inhibitor, marinobufagenin, cause inhibition of Friend leukemia virus integration 1 (Fli1), a negative regulator of collagen-1 synthesis. We hypothesized that in vitro silencing of Fli1 in healthy human umbilical arteries would be associated with an increase in collagen-1 output, similar to the effect of preeclampsia in rat and human tissues. METHODS The isolated segments of healthy human umbilical arteries were tested for sensitivity to MBG and Fli1 silencing with Fli1 siRNA or control siRNA. RESULTS Following 24-hour incubation of arteries with nanomolar concentrations of marinobufagenin, Fli1 expression was inhibited 5-fold (P < 0.001), and synthesis of collagen-1 increased 3 times (P < 0.01). Twenty-four-hour incubation of umbilical artery fragments with Fli1 siRNA caused a dramatic decrease of Fli1 (7-fold; P < 0.001) and cytoplasmic PKC δ (4-fold; P < 0.001) expression in comparison to control siRNA or untreated control, followed by elevation in procollagen (3-fold; P < 0.001) and collagen-1 (3-fold; P < 0.001) levels in vascular tissue. CONCLUSIONS Our results show that after silencing the Fli1 gene in healthy human umbilical arteries a new phenotype emerges which is typical for preeclampsia and is associated with vascular fibrosis.
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Affiliation(s)
- Natalia I Agalakova
- Sechenov Institute of Evolutionary Physiology and Biochemistry, St. Petersburg, Russia
| | - Vitaly A Reznik
- Department of Obstetrics and Gynecology, St. Petersburg State Pediatric Medical University, St. Petersburg, Russia
| | - Ivan A Ershov
- Department of Obstetrics and Gynecology, St. Petersburg State Pediatric Medical University, St. Petersburg, Russia
| | - Ekaterina A Lupanova
- Department of Obstetrics and Gynecology, St. Petersburg State Pediatric Medical University, St. Petersburg, Russia
| | - Olga V Nadei
- Sechenov Institute of Evolutionary Physiology and Biochemistry, St. Petersburg, Russia
| | - Dmitry O Ivanov
- Department of Obstetrics and Gynecology, St. Petersburg State Pediatric Medical University, St. Petersburg, Russia
| | - C David Adair
- Department of Obstetrics and Gynecology, Section on Maternal Fetal Medicine, University of Tennessee, Chattanooga, Tennessee, USA
| | - Alexei Y Bagrov
- Sechenov Institute of Evolutionary Physiology and Biochemistry, St. Petersburg, Russia
- Padakonn Pharma, Narva, Estonia
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103
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Pitsava G, Faucz FR, Stratakis CA, Hannah-Shmouni F. Update on the Genetics of Primary Aldosteronism and Aldosterone-Producing Adenomas. Curr Cardiol Rep 2022; 24:1189-1195. [PMID: 35841527 PMCID: PMC9667367 DOI: 10.1007/s11886-022-01735-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 06/07/2022] [Indexed: 11/03/2022]
Abstract
PURPOSE OF THE REVIEW Primary aldosteronism (PA) is the leading cause of secondary hypertension, accounting for over 10% of patients with high blood pressure. It is characterized by autonomous production of aldosterone from the adrenal glands leading to low-renin levels. The two most common forms arise from bilateral adrenocortical hyperplasia (BAH) and aldosterone-producing adenoma (APA). We discuss recent discoveries in the genetics of PA. RECENT FINDINGS Most APAs harbor variants in the KCNJ5, CACNA1D, ATP1A1, ATP2B3, and CTNNB1 genes. With the exception of β-catenin (CTNNB1), all other causative genes encode ion channels; pathogenic variants found in PA lead to altered ion transportation, cell membrane depolarization, and consequently aldosterone overproduction. Some of these genes are found mutated in the germline state (CYP11B2, CLCN2, KCNJ5, CACNA1H, and CACNA1D), leading then to familial hyperaldosteronism, and often BAH rather than single APAs. Several genetic defects in the germline or somatic state have been identified in PA. Understanding how these molecular abnormalities lead to excess aldosterone contributes significantly to the elucidation of the pathophysiology of low-renin hypertension. It may also lead to new and more effective therapies for this disease acting at the molecular level.
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Affiliation(s)
- Georgia Pitsava
- Division of Intramural Population Health Research, Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, Bethesda, MD, USA
- Section On Endocrinology and Genetics, Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, Bethesda, MD, USA
| | - Fabio R Faucz
- Section On Endocrinology and Genetics, Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, Bethesda, MD, USA
| | - Constantine A Stratakis
- Section On Endocrinology and Genetics, Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, Bethesda, MD, USA
- ELPEN Pharmaceuticals, Pikermi, Athens, Greece
- Human Genetics & Precision Medicine, IMBB, FORTH, Heraklion, Greece
| | - Fady Hannah-Shmouni
- Section On Endocrinology and Genetics, Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, Bethesda, MD, USA.
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Nelson G, Ye B, Schock M, Lustgarten DL, Mayhew EK, Palmer BM, Meyer M. Heart rate changes and myocardial sodium. Physiol Rep 2022; 10:e15446. [PMID: 36065860 PMCID: PMC9446395 DOI: 10.14814/phy2.15446] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2021] [Revised: 04/14/2022] [Accepted: 08/14/2022] [Indexed: 06/15/2023] Open
Abstract
Historic studies with sodium ion (Na+ ) micropipettes and first-generation fluorescent probes suggested that an increase in heart rate results in higher intracellular Na+ -levels. Using a dual fluorescence indicator approach, we simultaneously assessed the dynamic changes in intracellular Na+ and calcium (Ca2+ ) with measures of force development in isolated excitable myocardial strip preparations from rat and human left ventricular myocardium at different stimulation rates and modeled the Na+ -effects on the sodium-calcium exchanger (NCX). To gain further insight into the effects of heart rate on intracellular Na+ -regulation and sodium/potassium ATPase (NKA) function, Na+ , and potassium ion (K+ ) levels were assessed in the coronary effluent (CE) of paced human subjects. Increasing the stimulation rate from 60/min to 180/min led to a transient Na+ -peak followed by a lower Na+ -level, whereas the return to 60/min had the opposite effect leading to a transient Na+ -trough followed by a higher Na+ -level. The presence of the Na+ -peak and trough suggests a delayed regulation of NKA activity in response to changes in heart rate. This was clinically confirmed in the pacing study where CE-K+ levels were raised above steady-state levels with rapid pacing and reduced after pacing cessation. Despite an initial Na+ peak that is due to a delayed increase in NKA activity, an increase in heart rate was associated with lower, and not higher, Na+ -levels in the myocardium. The dynamic changes in Na+ unveil the adaptive role of NKA to maintain Na+ and K+ -gradients that preserve membrane potential and cellular Ca2+ -hemostasis.
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Affiliation(s)
- Gabrielle Nelson
- Department of MedicineLillehei Heart Institute, University of Minnesota College of MedicineMinneapolisMinnesotaUSA
| | - Bo Ye
- Department of MedicineLillehei Heart Institute, University of Minnesota College of MedicineMinneapolisMinnesotaUSA
| | - Morgan Schock
- Department of MedicineLillehei Heart Institute, University of Minnesota College of MedicineMinneapolisMinnesotaUSA
| | - Daniel L. Lustgarten
- Department of Medicine and PhysiologyUniversity of Vermont Larner College of MedicineBurlingtonVermontUSA
| | - Elisabeth K. Mayhew
- Department of Medicine and PhysiologyUniversity of Vermont Larner College of MedicineBurlingtonVermontUSA
| | - Bradley M. Palmer
- Department of Medicine and PhysiologyUniversity of Vermont Larner College of MedicineBurlingtonVermontUSA
| | - Markus Meyer
- Department of MedicineLillehei Heart Institute, University of Minnesota College of MedicineMinneapolisMinnesotaUSA
- Department of Medicine and PhysiologyUniversity of Vermont Larner College of MedicineBurlingtonVermontUSA
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105
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Apiamu A, Osawaru SU, Asagba SO, Evuen UF, Achuba FI. Exposure of African Catfish (Clarias gariepinus) to Lead and Zinc Modulates Membrane-Bound Transport Protein: A Plausible Effect on Na +/K +-ATPase Activity. Biol Trace Elem Res 2022; 200:4160-4170. [PMID: 34791624 DOI: 10.1007/s12011-021-03005-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/14/2021] [Accepted: 10/31/2021] [Indexed: 10/19/2022]
Abstract
The contamination of the aquatic ecosystem beyond tolerable limits may pose serious health challenges to its components. This study evaluated the toxic effects of a binary mixture of lead (Pb) and zinc (Zn) compounds on the activity of Na+/K+-ATPase in tissues of Clarias gariepinus in a controlled aquatic system. The study employed Box-Behnken Design (BBD) with 17 runs in which Pb and Zn concentrations were considered process variables in a time-dependent fashion. Metal exposure levels consisted of 0, 10 and 20% of 96 h-LC50 of Pb (55.12 mg/L) and Zn (32.15 mg/L) for three weeks. Thereafter, membrane-bound Na+/K+-ATPase activity was assessed in gill, hepatic and renal tissues, and data generated from the BBD were used for the development of models. Three regression models were obtained, for gill, hepatic and renal Na+/K+-ATPase activities with exposure to metals differ significantly (p < 0.05) at R2 > 90%, and no significant lack of fit (p > 0.05) was observed in each case. Congruent to the synergistic interactions observed between Pb and Zn in the study, the gill and hepatic Na+/K+-ATPase activities were significantly inhibited, whereas renal Na+/K+-ATPase activity was significantly stimulated (p < 0.05). The optimized models were considered reliable, as they were confirmed in the laboratory through accurate prediction of hepatic, renal and gill Na+/K+-ATPase activities with equivalences of 1.22 ± 0.17, 1.66 ± 0.07 and 3.50 ± 0.33 µmol pi/min/mg protein (p < 0.05) respectively. It is hereby concluded that the synergistic interaction between Pb and Zn truncated the physiological function of Na+/K+-ATPase activity in the respective tissues except for renal tissue of exposed C. gariepinus.
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Affiliation(s)
- Augustine Apiamu
- Department of Biochemistry, Faculty of Science, Delta State University, P.M.B. 1, Abraka, Nigeria.
| | - Sophia U Osawaru
- Department of Biochemistry, College of Natural and Applied Sciences, Western Delta University, P.M.B. 10, Oghara, Nigeria
| | - Samuel O Asagba
- Department of Biochemistry, Faculty of Science, Delta State University, P.M.B. 1, Abraka, Nigeria
| | - Uduenevwo F Evuen
- Department of Biochemistry, College of Natural and Applied Sciences, Western Delta University, P.M.B. 10, Oghara, Nigeria
| | - Fidelis I Achuba
- Department of Biochemistry, Faculty of Science, Delta State University, P.M.B. 1, Abraka, Nigeria
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106
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Chasalow F. An Introduction to Spiral Steroids. Int J Mol Sci 2022; 23:ijms23179523. [PMID: 36076935 PMCID: PMC9455587 DOI: 10.3390/ijms23179523] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2022] [Revised: 08/13/2022] [Accepted: 08/16/2022] [Indexed: 11/16/2022] Open
Abstract
In addition to classical steroids, which have cholesterol as a precursor, there are steroids with 7-dehydrocholesterol as a precursor. This review describes the identification of these steroids, their biosynthesis, and some aspects of their function. There are three classes of these compounds, distinguished by the number of their carbon atoms, 23, 24, and 25. Each class has a spiral steroid and is a phosphodiester. Up until these investigations, no spiral steroids or steroid phosphodiesters were known. There are at least 13 compounds, of which six have been purified to near homogeneity; each one has been characterized by its mass and proposed composition, and they function by regulating the NaK-ATPase. Based on the tissues in which they have been detected, each class of compound seems to regulate a different isoform of the NaK-ATPase. This is an important site of endocrine regulation.
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Affiliation(s)
- Fred Chasalow
- IOMA LLC, Belmont, CA 94002-3321, USA; ; Tel.: +1-650-576-1800
- Department of Laboratory Medicine, VAMC, San Francisco, CA 94121-1545, USA
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107
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Laube M, Thome UH. Albumin Stimulates Epithelial Na + Transport and Barrier Integrity by Activating the PI3K/AKT/SGK1 Pathway. Int J Mol Sci 2022; 23:ijms23158823. [PMID: 35955955 PMCID: PMC9368928 DOI: 10.3390/ijms23158823] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2022] [Revised: 08/04/2022] [Accepted: 08/05/2022] [Indexed: 11/17/2022] Open
Abstract
Albumin is a major serum protein and is frequently used as a cell culture supplement. It is crucially involved in the regulation of osmotic pressure and distribution of fluid between different compartments. Alveolar epithelial Na+ transport drives alveolar fluid clearance (AFC), enabling air breathing. Whether or not albumin affects AFC and Na+ transport is yet unknown. We therefore determined the acute and chronic effects of albumin on Na+ transport in fetal distal lung epithelial (FDLE) cells and the involved kinase pathways. Chronic BSA treatment strongly increased epithelial Na+ transport and barrier integrity in Ussing chambers. BSA did not elevate mRNA expression of Na+ transporters in FDLE cells after 24 h. Moreover, acute BSA treatment for 45 min mimicked the chronic effects. The elevated Na+ transport was caused by an increased maximal ENaC activity, while Na,K-ATPase activity remained unchanged. Acute and chronic BSA treatment lowered membrane permeability, confirming the increased barrier integrity observed in Ussing chambers. Western blots demonstrated an increased phosphorylation of AKT and SGK1, and PI3K inhibition abolished the stimulating effect of BSA. BSA therefore enhanced epithelial Na+ transport and barrier integrity by activating the PI3K/AKT/SGK1 pathway.
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108
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Jasim SA, Golgouneh S, Jaber MM, Indiaminov SI, Alsaikhan F, Hammid AT, Mustafa YF, Karim YS, Sultan MQ, Norbakhsh M. Effects of short-term exposure to the heavy metal, nickel chloride (Nicl 2) on gill histology and osmoregulation components of the gray mullet, Mugil cephalus. Comp Biochem Physiol C Toxicol Pharmacol 2022; 258:109361. [PMID: 35525465 DOI: 10.1016/j.cbpc.2022.109361] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/10/2022] [Revised: 04/17/2022] [Accepted: 05/01/2022] [Indexed: 11/03/2022]
Abstract
The gray mullet, Mugil cephalus is an inshore and bottom-feeding fish species of Oman sea. Therefore, the gray mullet may be more exposed to heavy metal contamination, as the toxic impacts of heavy metals mullet has been reported in various studies. This study was conducted to evaluate the toxic effects of the heavy metal, nickel (as NiCl2) on osmoregulation of the gray mullet by measuring blood biochemicals, hormones, minerals and gill histology. Fish (10 fish/tank) were experimentally exposed to NiCl2 at three environmentally relevant concentrations of 5, 10 and 15 μg/l for 96 h. Then, fish were challenged with seawater (35 mg/l) for a period of 120 min. The samples (blood and gill tissue) were collected After 96 exposure to NiCl2 and during salinity challenge (30, 60 and 120 min post challenge). The plasma levels of cortisol and glucose significantly increased in NiCl2-exposed fish. In addition, cortisol increased in all experimental groups 30 min after salinity challenge and then returned gradually to the same levels as the control at 120 min post salinity challenge (PSC). The triiodothyronine (T3) and thyroxine (T4) levels significantly decreased in response to 10 and 15 μg/l NiCl2. In all groups, the thyroid hormones significantly elevated at 30 min PSC. After 30 min PSC, T3 levels in all NiCl2-exposed fish and T4 in the treatment, 10 μg/l NiCl2 remained unchanged throughout the salinity challenge. In the treatment, 5 μg/l NiCl2, T4 levels were recovered at 120 min PSC and reached the same levels as the control. Exposure of fish to high concentrations of NiCl2 and salinity stress increased the lactate levels. However, lactate levels in 5 and 10 μg/l NiCl2 groups were recovered at 120 min PSC and reached the same levels as the control. Furthermore, plasma protein increased in response to 10 and 15 μg/l NiCl2. At 30 PSC, the protein levels decreased in control and 5 μg/l NiCl2 group, while it remained unchanged in fish exposed to 10 and 15 μg/l NiCl2 throughout the salinity challenge. Exposure of fish to NiCl2 disrupted the electrolyte (Na+, Cl-) balance both before and after salinity challenge, which may be due to gill lesions induced by the heavy metal and following alternations in gill permeability. However, fish in 5 μg/l NiCl2 re-established the ionic balance in the blood at the end of salinity challenge period. The malondialdehyde (MDA) levels significantly increased in response to 10 and 15 μg/l NiCl2. The MDA levels returned to the same levels as the control group at 120 min PSC. The results of the present study showed that nickel-induced toxicity (especially at high concentrations) can reduce the osmoregulation capabilities of mullet. However, fish are able to recover from the toxic effects over time, if contamination be eliminated.
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Affiliation(s)
- Saade Abdalkareem Jasim
- Medical Laboratory Techniques Department, Al-maarif University College, Al-anbar-Ramadi, Iraq.
| | - Sahar Golgouneh
- Department of Fisheries, Faculty of Natural Resources, University of Tehran, Tehran, Iran
| | - Mustafa Musa Jaber
- Department of Medical Instruments Engineering Techniques, Dijlah University College, Baghdad 10021, Iraq; Department of Medical Instruments Engineering Techniques, Al-Farahidi University, Baghdad 10021, Iraq
| | - Sayit I Indiaminov
- Doctor of Medical Sciences, Department of Forensic Medicine, Samarkand State Medical Institute, Samarkand, Uzbekistan; Department of Scientific Affairs, Tashkent State Dental Institute, Makhtumkuli Street 103, Tashkent 100047, Uzbekistan
| | - Fahad Alsaikhan
- Department of Clinical Pharmacy, College of Pharmacy, Prince Sattam Bin Abdulaziz University, Alkharj, Saudi Arabia
| | - Ali Thaeer Hammid
- Computer Engineering Department, Imam Ja'afar Al-Sadiq University, Baghdad, Iraq
| | - Yasser Fakri Mustafa
- Department of Pharmaceutical Chemistry, College of Pharmacy, University of Mosul, Mosul 41001, Iraq
| | | | | | - Maryam Norbakhsh
- Department of Microbiology, Faculty of Biology, Islamic Azad University Science and Research Branch, Tehran, Iran
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109
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Luduvico KP, Spohr L, de Aguiar MSS, Teixeira FC, Bona NP, de Mello JE, Spanevello RM, Stefanello FM. LPS-induced impairment of Na +/K +-ATPase activity: ameliorative effect of tannic acid in mice. Metab Brain Dis 2022; 37:2133-2140. [PMID: 35759073 DOI: 10.1007/s11011-022-01036-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/11/2022] [Accepted: 06/13/2022] [Indexed: 10/17/2022]
Abstract
Acetylcholine is an excitatory neurotransmitter that modulates synaptic plasticity and communication, and it is essential for learning and memory processes. This neurotransmitter is hydrolyzed by acetylcholinesterase (AChE), which plays other cellular roles in processes such as inflammation and oxidative stress. Ion pumps, such as Na+/K+-ATPase and Ca2+-ATPase, are highly expressed channels that derive energy for their functions from ATP hydrolysis. Impairment of the cholinergic system and ion pumps is associated with neuropsychiatric diseases. Major depressive disorder (MDD) is an example of a complex disease with high morbidity and a heterogenous etiology. Polyphenols have been investigated for their therapeutic effects, and tannic acid (TA) has been reported to show neuroprotective and antidepressant-like activities. Animal models of depression-like behavior, such as lipopolysaccharide (LPS)-induced models of depression, are useful for investigating the pathophysiology of MDD. In this context, effects of TA were evaluated in an LPS-induced mouse model of depression-like behavior. Animals received TA for 7 days, and on the last day of treatment, LPS (830 μg/kg) was administered intraperitoneally. In vitro exposure of healthy brain to TA decreased the AChE activity. Additionally, this enzyme activity was decreased in cerebral cortex of LPS-treated mice. LPS injection increased the activity of Ca2+-ATPase in the cerebral cortex but decreased the enzyme activity in the hippocampus. LPS administration decreased Na+/K+-ATPase activity in the cerebral cortex, hippocampus, and striatum; however, TA administration prevented these changes. In conclusion, tannins may affect Na+/K+-ATPase and Ca2+-ATPase activities, which is interesting in the context of MDD.
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Affiliation(s)
- Karina Pereira Luduvico
- Programa de Pós-Graduação em Bioquímica e Bioprospecção, Laboratório de Biomarcadores, Centro de Ciências Químicas, Farmacêuticas e de Alimentos, Universidade Federal de Pelotas, Campus Universitário s/n, Pelotas, RS, CEP: 96010-900, Brazil.
| | - Luiza Spohr
- Programa de Pós-Graduação em Bioquímica e Bioprospecção, Laboratório de Neuroquímica, Inflamação e Câncer, Centro de Ciências Químicas, Farmacêuticas e de Alimentos, Universidade Federal de Pelotas, Campus Universitário s/n, Pelotas, RS, CEP: 96010-900, Brazil
| | - Mayara Sandrielly Soares de Aguiar
- Programa de Pós-Graduação em Bioquímica e Bioprospecção, Laboratório de Neuroquímica, Inflamação e Câncer, Centro de Ciências Químicas, Farmacêuticas e de Alimentos, Universidade Federal de Pelotas, Campus Universitário s/n, Pelotas, RS, CEP: 96010-900, Brazil
| | - Fernanda Cardoso Teixeira
- Programa de Pós-Graduação em Bioquímica e Bioprospecção, Laboratório de Neuroquímica, Inflamação e Câncer, Centro de Ciências Químicas, Farmacêuticas e de Alimentos, Universidade Federal de Pelotas, Campus Universitário s/n, Pelotas, RS, CEP: 96010-900, Brazil
| | - Natália Pontes Bona
- Programa de Pós-Graduação em Bioquímica e Bioprospecção, Laboratório de Biomarcadores, Centro de Ciências Químicas, Farmacêuticas e de Alimentos, Universidade Federal de Pelotas, Campus Universitário s/n, Pelotas, RS, CEP: 96010-900, Brazil
| | - Julia Eisenhardt de Mello
- Programa de Pós-Graduação em Bioquímica e Bioprospecção, Laboratório de Neuroquímica, Inflamação e Câncer, Centro de Ciências Químicas, Farmacêuticas e de Alimentos, Universidade Federal de Pelotas, Campus Universitário s/n, Pelotas, RS, CEP: 96010-900, Brazil
| | - Roselia Maria Spanevello
- Programa de Pós-Graduação em Bioquímica e Bioprospecção, Laboratório de Neuroquímica, Inflamação e Câncer, Centro de Ciências Químicas, Farmacêuticas e de Alimentos, Universidade Federal de Pelotas, Campus Universitário s/n, Pelotas, RS, CEP: 96010-900, Brazil
| | - Francieli Moro Stefanello
- Programa de Pós-Graduação em Bioquímica e Bioprospecção, Laboratório de Biomarcadores, Centro de Ciências Químicas, Farmacêuticas e de Alimentos, Universidade Federal de Pelotas, Campus Universitário s/n, Pelotas, RS, CEP: 96010-900, Brazil.
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Lacy B, Rahman MS, Rahman MS. Potential mechanisms of Na +/K +-ATPase attenuation by heat and pesticides co-exposure in goldfish: role of cellular apoptosis, oxidative/nitrative stress, and antioxidants in gills. Environ Sci Pollut Res Int 2022; 29:57376-57394. [PMID: 35352221 DOI: 10.1007/s11356-022-19779-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/02/2021] [Accepted: 03/11/2022] [Indexed: 06/14/2023]
Abstract
In this study, we examined the dose-dependent effects of an environmentally relevant pesticide cocktail (metalachlor, linuron, isoproturon, tebucanazole, aclonifen, atrazine, pendimethalin, and azinphos-methyl) and temperature change (22 vs. 32 °C for 4-week exposure) on Na+/K+-ATPase, 3-nitrotyrosine protein (NTP), dinitrophenyl protein (DNP), catalase (CAT), and superoxide dismutase (SOD) expressions in gills of goldfish (Carassius auratus). Histopathological analysis showed widespread damage to gill in elevated temperature (32 °C) and pesticide co-exposure groups, including fusion of secondary lamellae, club-shaped primary lamellae, rupture of epithelial layer, loss of normal architecture, and hemorrhaging. Immunohistochemical and qRT-PCR analyses showed significant decreases in Na+/K+-ATPase protein and mRNA expressions in gills exposed to higher temperature and pesticides; however, combined exposure to heat and pesticides significantly increases NTP, DNP, CAT, and SOD expressions. In situ TUNEL assay revealed elevated levels of apoptotic cells in response to combined exposure. Collectively, our results suggest the combined effects of heat and pesticide stress cause cellular damage, upregulate oxidative/nitrative stress biomarkers, and increase apoptotic cells, downregulate Na+/K+-ATPase expression in gills. This provides new evidence for oxidant/antioxidant-dependent mechanisms for downregulation of Na+/K+-ATPase expression in gills during combined exposure.
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Affiliation(s)
- Brittney Lacy
- School of Earth, Environmental and Marine Sciences, University of Texas Rio Grande Valley, 1 West University Drive, Brownsville, TX, 78520, USA
| | - Md Sadequr Rahman
- School of Earth, Environmental and Marine Sciences, University of Texas Rio Grande Valley, 1 West University Drive, Brownsville, TX, 78520, USA
| | - Md Saydur Rahman
- School of Earth, Environmental and Marine Sciences, University of Texas Rio Grande Valley, 1 West University Drive, Brownsville, TX, 78520, USA.
- Department of Biology, University of Texas Rio Grande Valley, Brownsville, TX, USA.
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111
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Scoles DR, Gandelman M, Paul S, Dexheimer T, Dansithong W, Figueroa KP, Pflieger LT, Redlin S, Kales SC, Sun H, Maloney D, Damoiseaux R, Henderson MJ, Simeonov A, Jadhav A, Pulst SM. A quantitative high-throughput screen identifies compounds that lower expression of the SCA2-and ALS-associated gene ATXN2. J Biol Chem 2022; 298:102228. [PMID: 35787375 PMCID: PMC9356275 DOI: 10.1016/j.jbc.2022.102228] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2022] [Revised: 06/26/2022] [Accepted: 06/28/2022] [Indexed: 11/29/2022] Open
Abstract
CAG repeat expansions in the ATXN2 (ataxin-2) gene can cause the autosomal dominant disorder spinocerebellar ataxia type 2 (SCA2) as well as increase the risk of ALS. Abnormal molecular, motor, and neurophysiological phenotypes in SCA2 mouse models are normalized by lowering ATXN2 transcription, and reduction of nonmutant Atxn2 expression has been shown to increase the life span of mice overexpressing the TDP-43 (transactive response DNA-binding protein 43 kDa) ALS protein, demonstrating the potential benefits of targeting ATXN2 transcription in humans. Here, we describe a quantitative high-throughput screen to identify compounds that lower ATXN2 transcription. We screened 428,759 compounds in a multiplexed assay using an ATXN2-luciferase reporter in human embryonic kidney 293 (HEK-293) cells and identified a diverse set of compounds capable of lowering ATXN2 transcription. We observed dose-dependent reductions of endogenous ATXN2 in HEK-293 cells treated with procillaridin A, 17-dimethylaminoethylamino-17-demethoxygeldanamycin (17-DMAG), and heat shock protein 990 (HSP990), known inhibitors of HSP90 and Na+/K+-ATPases. Furthermore, HEK-293 cells expressing polyglutamine-expanded ATXN2-Q58 treated with 17-DMAG had minimally detectable ATXN2, as well as normalized markers of autophagy and endoplasmic reticulum stress, including STAU1 (Staufen 1), molecular target of rapamycin, p62, LC3-II (microtubule-associated protein 1A/1B-light chain 3II), CHOP (C/EBP homologous protein), and phospho-eIF2α (eukaryotic initiation factor 2α). Finally, bacterial artificial chromosome ATXN2-Q22 mice treated with 17-DMAG or HSP990 exhibited highly reduced ATXN2 protein abundance in the cerebellum. Taken together, our study demonstrates inhibition of HSP90 or Na+/K+-ATPases as potentially effective therapeutic strategies for treating SCA2 and ALS.
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Affiliation(s)
- Daniel R Scoles
- Department of Neurology, University of Utah, Salt Lake City, Utah, USA.
| | - Mandi Gandelman
- Department of Neurology, University of Utah, Salt Lake City, Utah, USA
| | - Sharan Paul
- Department of Neurology, University of Utah, Salt Lake City, Utah, USA
| | - Thomas Dexheimer
- Division of Preclinical Innovation, National Center for Advancing Translational Sciences (NCATS), Rockville, Maryland, USA
| | | | - Karla P Figueroa
- Department of Neurology, University of Utah, Salt Lake City, Utah, USA
| | - Lance T Pflieger
- Department of Biomedical Informatics, University of Utah, Salt Lake City, Utah, USA
| | - Scott Redlin
- Department of Neurology, University of Utah, Salt Lake City, Utah, USA
| | - Stephen C Kales
- Division of Preclinical Innovation, National Center for Advancing Translational Sciences (NCATS), Rockville, Maryland, USA
| | - Hongmao Sun
- Division of Preclinical Innovation, National Center for Advancing Translational Sciences (NCATS), Rockville, Maryland, USA
| | - David Maloney
- Division of Preclinical Innovation, National Center for Advancing Translational Sciences (NCATS), Rockville, Maryland, USA
| | - Robert Damoiseaux
- Department of Molecular and Medical Pharmacology, Jonsson Comprehensive Cancer Center, California NanoSystems Institute, and Department of Bioengineering in the Samueli School of Engineering, University of California Los Angeles, Los Angeles, California, USA
| | - Mark J Henderson
- Division of Preclinical Innovation, National Center for Advancing Translational Sciences (NCATS), Rockville, Maryland, USA
| | - Anton Simeonov
- Division of Preclinical Innovation, National Center for Advancing Translational Sciences (NCATS), Rockville, Maryland, USA
| | - Ajit Jadhav
- Division of Preclinical Innovation, National Center for Advancing Translational Sciences (NCATS), Rockville, Maryland, USA
| | - Stefan M Pulst
- Department of Neurology, University of Utah, Salt Lake City, Utah, USA.
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112
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Abstract
Transmembrane potassium (K) gradients are key determinants of membrane potential that can modulate action potentials, control muscle contractility, and influence ion channel and transporter activity. Daily K intake is normally equal to the amount of K in the entire extracellular fluid (ECF) creating a critical challenge - how to maintain ECF [K] and membrane potential in a narrow range during feast and famine. Adaptations to maintain ECF [K] include sensing the K intake, sensing ECF [K] vs. desired set-point and activating mediators that regulate K distribution between ECF and ICF, and regulate renal K excretion. In this focused review, we discuss the basis of these adaptions, including (1) potential mechanisms for rapid feedforward signaling to kidney and muscle after a meal (before a rise in ECF [K]), (2) how skeletal muscles sense and respond to changes in ECF [K], (3) effects of K on aldosterone biosynthesis, and (4) how the kidney responds to changes in ECF [K] to modify K excretion. The concepts of sexual dimorphisms in renal K handling adaptation are introduced, and the molecular mechanisms that can account for the benefits of a K-rich diet to maintain cardiovascular health are discussed. Although the big picture of K homeostasis is becoming more clear, we also highlight significant pieces of the puzzle that remain to be solved, including knowledge gaps in our understanding of initiating signals, sensors and their connection to homeostatic adjustments of ECF [K].
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Affiliation(s)
- Alicia A McDonough
- Department of Physiology and Neuroscience, University of Southern California Keck School of Medicine, Los Angeles, CA, USA.
| | - Robert A Fenton
- Department of Biomedicine, Aarhus University, Aarhus, Denmark
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113
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Pepe N, Canli EG, Canli M. Salinity and/or nanoparticles (Al 2O 3, TiO 2) affect metal accumulation and ATPase activity in freshwater fish (Oreochromis niloticus). Environ Toxicol Pharmacol 2022; 94:103931. [PMID: 35843485 DOI: 10.1016/j.etap.2022.103931] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/27/2022] [Revised: 07/05/2022] [Accepted: 07/09/2022] [Indexed: 06/15/2023]
Abstract
The osmoregulation system of freshwater fish is sensitive to salinity increase in water. There is no satisfactory data to our knowledge on the accumulation of metal-oxide nanoparticles (NPs) in tissues of O. niloticus and their effects on ATPases (Na,K-ATPase, Mg-ATPase, Ca-ATPase) in differing salinities. Thus, this study investigated the effects of salinity (0 and 10 ppt) and Al2O3 and TiO2 NPs (1 and 10 mg NPs/L) on the response of ATPases in acute (2 days) and chronic (20 days) durations. Data showed that nanoparticles accumulated in the tissues of fish, gill tissues having the highest levels of Al and Ti in both acute and chronic durations. Interestingly, the higher salinity significantly increased (P < 0.05) NP accumulations in the tissues in acute exposures, whereas it significantly decreased (P < 0.05) in chronic exposures. Salinity increase caused significant decreases (P < 0.05) in ATPase activities (up to 54 %) in control fish from both exposure protocols. Likewise, NP alone exposures (up to 80 %) and salt+NP (up to 83 %) exposures generally caused significant (P < 0.05) decreases in ATPase activities compared to their controls. Similarly, salt+NP exposures also decreased ATPase activities compared to NP exposures alone. The present data demonstrated that salinity and/or NP exposures decreased ATPase activities in the gill of freshwater fish, emphasizing the possible hazardous consequences of salt inputs and NP discharges into freshwater systems.
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Affiliation(s)
- Nagihan Pepe
- University of Çukurova, Faculty of Sciences and Arts, Department of Biology, Adana, Turkey
| | - Esin Gülnaz Canli
- University of Çukurova, Faculty of Pharmacy, Department of Basic Pharmaceutical Sciences, Adana, Turkey
| | - Mustafa Canli
- University of Çukurova, Faculty of Sciences and Arts, Department of Biology, Adana, Turkey.
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114
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Gao Y, Silva LND, Hurley JD, Fan X, Pierre SV, Sodhi K, Liu J, Shapiro JI, Tian J. Gene module regulation in dilated cardiomyopathy and the role of Na/K-ATPase. PLoS One 2022; 17:e0272117. [PMID: 35901050 PMCID: PMC9333241 DOI: 10.1371/journal.pone.0272117] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2022] [Accepted: 07/12/2022] [Indexed: 01/25/2023] Open
Abstract
Dilated cardiomyopathy (DCM) is a major cause of cardiac death and heart transplantation. It has been known that black people have a higher incidence of heart failure and related diseases compared to white people. To identify the relationship between gene expression and cardiac function in DCM patients, we performed pathway analysis and weighted gene co-expression network analysis (WGCNA) using RNA-sequencing data (GSE141910) from the NCBI Gene Expression Omnibus (GEO) database and identified several gene modules that were significantly associated with the left ventricle ejection fraction (LVEF) and DCM phenotype. Genes included in these modules are enriched in three major categories of signaling pathways: fibrosis-related, small molecule transporting-related, and immune response-related. Through consensus analysis, we found that gene modules associated with LVEF in African Americans are almost identical as in Caucasians, suggesting that the two groups may have more common rather than disparate genetic regulations in the etiology of DCM. In addition to the identified modules, we found that the gene expression level of Na/K-ATPase, an important membrane ion transporter, has a strong correlation with the LVEF. These clinical results are consistent with our previous findings and suggest the clinical significance of Na/K-ATPase regulation in DCM.
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Affiliation(s)
- Yingnyu Gao
- Marshall Institute for Interdisciplinary Research, Marshall University, Huntington, WV, United States of America
| | - Lilian N. D. Silva
- Marshall Institute for Interdisciplinary Research, Marshall University, Huntington, WV, United States of America
| | - John D. Hurley
- Department of Biomedical Sciences, Marshall University Joan C. Edwards Medical School, Huntington, WV, United States of America
| | - Xiaoming Fan
- Department of Medicine, University of Toledo, Toledo, OH, United States of America
| | - Sandrine V. Pierre
- Marshall Institute for Interdisciplinary Research, Marshall University, Huntington, WV, United States of America
| | - Komal Sodhi
- Department of Biomedical Sciences, Marshall University Joan C. Edwards Medical School, Huntington, WV, United States of America
| | - Jiang Liu
- Department of Biomedical Sciences, Marshall University Joan C. Edwards Medical School, Huntington, WV, United States of America
| | - Joseph I. Shapiro
- Department of Biomedical Sciences, Marshall University Joan C. Edwards Medical School, Huntington, WV, United States of America
| | - Jiang Tian
- Marshall Institute for Interdisciplinary Research, Marshall University, Huntington, WV, United States of America
- Department of Biomedical Sciences, Marshall University Joan C. Edwards Medical School, Huntington, WV, United States of America
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115
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Schmid V, Wurzel A, Wetzel CH, Plössl K, Bruckmann A, Luckner P, Weber BHF, Friedrich U. Retinoschisin and novel Na/K-ATPase interaction partners Kv2.1 and Kv8.2 define a growing protein complex at the inner segments of mammalian photoreceptors. Cell Mol Life Sci 2022; 79:448. [PMID: 35876901 PMCID: PMC9314279 DOI: 10.1007/s00018-022-04409-9] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2022] [Revised: 05/05/2022] [Accepted: 05/30/2022] [Indexed: 11/28/2022]
Abstract
The RS1 gene on Xp 22.13 encodes retinoschisin which is known to directly interact with the retinal Na/K-ATPase at the photoreceptor inner segments. Pathologic mutations in RS1 cause X-linked juvenile retinoschisis (XLRS), a hereditary retinal dystrophy in young males. To further delineate the retinoschisin-Na/K-ATPase complex, co-immunoprecipitation was performed with porcine and murine retinal lysates targeting the ATP1A3 subunit. This identified the voltage-gated potassium (Kv) channel subunits Kv2.1 and Kv8.2 as direct interaction partners of the retinal Na/K-ATPase. Colocalization of the individual components of the complex was demonstrated at the membrane of photoreceptor inner segments. We further show that retinoschisin-deficiency, a frequent consequence of molecular pathology in XLRS, causes mislocalization of the macromolecular complex during postnatal retinal development with a simultaneous reduction of Kv2.1 and Kv8.2 protein expression, while the level of retinal Na/K-ATPase expression remains unaffected. Patch-clamp analysis revealed no effect of retinoschisin-deficiency on Kv channel mediated potassium ion currents in vitro. Together, our data suggest that Kv2.1 and Kv8.2 together with retinoschisin and the retinal Na/K-ATPase are integral parts of a macromolecular complex at the photoreceptor inner segments. Defective compartmentalization of this complex due to retinoschisin-deficiency may be a crucial step in initial XLRS pathogenesis.
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Affiliation(s)
- Verena Schmid
- Institute of Human Genetics, University of Regensburg, Franz-Josef-Strauss-Allee 11, 93053, Regensburg, Germany
| | - Alexander Wurzel
- Institute of Human Genetics, University of Regensburg, Franz-Josef-Strauss-Allee 11, 93053, Regensburg, Germany
| | - Christian H Wetzel
- Department of Psychiatry and Psychotherapy, University of Regensburg, Franz-Josef-Strauss-Allee 11, 93053, Regensburg, Germany
| | - Karolina Plössl
- Institute of Human Genetics, University of Regensburg, Franz-Josef-Strauss-Allee 11, 93053, Regensburg, Germany
| | - Astrid Bruckmann
- Institute of Biochemistry, Genetics and Microbiology, Protein Mass Spectrometry Group, University of Regensburg, Universitätsstraße 31, 93053, Regensburg, Germany
| | - Patricia Luckner
- Institute of Biochemistry, Genetics and Microbiology, Protein Mass Spectrometry Group, University of Regensburg, Universitätsstraße 31, 93053, Regensburg, Germany
| | - Bernhard H F Weber
- Institute of Human Genetics, University of Regensburg, Franz-Josef-Strauss-Allee 11, 93053, Regensburg, Germany.
- Institute of Clinical Human Genetics, University Hospital Regensburg, Franz-Josef-Strauss-Allee 11, 93053, Regensburg, Germany.
| | - Ulrike Friedrich
- Institute of Human Genetics, University of Regensburg, Franz-Josef-Strauss-Allee 11, 93053, Regensburg, Germany.
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Roldán ML, Ramírez-Salinas GL, Martinez-Archundia M, Cuellar-Perez F, Vilchis-Nestor CA, Cancino-Diaz JC, Shoshani L. The β2-Subunit (AMOG) of Human Na+, K+-ATPase Is a Homophilic Adhesion Molecule. Int J Mol Sci 2022; 23:ijms23147753. [PMID: 35887102 PMCID: PMC9322774 DOI: 10.3390/ijms23147753] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2022] [Revised: 07/05/2022] [Accepted: 07/05/2022] [Indexed: 12/10/2022] Open
Abstract
The β2 subunit of Na+, K+-ATPase was originally identified as the adhesion molecule on glia (AMOG) that mediates the adhesion of astrocytes to neurons in the central nervous system and that is implicated in the regulation of neurite outgrowth and neuronal migration. While β1 isoform have been shown to trans-interact in a species-specific mode with the β1 subunit on the epithelial neighboring cell, the β2 subunit has been shown to act as a recognition molecule on the glia. Nevertheless, none of the works have identified the binding partner of β2 or described its adhesion mechanism. Until now, the interactions pronounced for β2/AMOG are heterophilic cis-interactions. In the present report we designed experiments that would clarify whether β2 is a cell–cell homophilic adhesion molecule. For this purpose, we performed protein docking analysis, cell–cell aggregation, and protein–protein interaction assays. We observed that the glycosylated extracellular domain of β2/AMOG can make an energetically stable trans-interacting dimer. We show that CHO (Chinese Hamster Ovary) fibroblasts transfected with the human β2 subunit become more adhesive and make large aggregates. The treatment with Tunicamycin in vivo reduced cell aggregation, suggesting the participation of N-glycans in that process. Protein–protein interaction assay in vivo with MDCK (Madin-Darby canine kidney) or CHO cells expressing a recombinant β2 subunit show that the β2 subunits on the cell surface of the transfected cell lines interact with each other. Overall, our results suggest that the human β2 subunit can form trans-dimers between neighboring cells when expressed in non-astrocytic cells, such as fibroblasts (CHO) and epithelial cells (MDCK).
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Affiliation(s)
- María Luisa Roldán
- Department of Physiology, Biophysics and Neurosciences, CINVESTAV-IPN, 2508 IPN Ave., San Pedro Zacatenco, Ciudad de México 07360, Mexico; (M.L.R.); (F.C.-P.); (C.A.V.-N.)
| | - Gema Lizbeth Ramírez-Salinas
- Department of Immunology, Instituto de Investigaciones Biomédicas, Universidad Nacional Autónoma de México (UNAM), Circuito, Mario de La Cueva S/N, C.U., Coyoacán, Ciudad de México 04510, Mexico;
| | - Marlet Martinez-Archundia
- Laboratorio de Modelado Molecular, Bioinformática y Diseño de Fármacos, Departamento de Posgrado Escuela Superior de Medicina del Instituto Politécnico Nacional, Salvador Díaz Mirón esq. Plan de San Luis S/N, Miguel Hidalgo, Casco de Santo Tomas, Ciudad de México 11340, Mexico;
| | - Francisco Cuellar-Perez
- Department of Physiology, Biophysics and Neurosciences, CINVESTAV-IPN, 2508 IPN Ave., San Pedro Zacatenco, Ciudad de México 07360, Mexico; (M.L.R.); (F.C.-P.); (C.A.V.-N.)
| | - Claudia Andrea Vilchis-Nestor
- Department of Physiology, Biophysics and Neurosciences, CINVESTAV-IPN, 2508 IPN Ave., San Pedro Zacatenco, Ciudad de México 07360, Mexico; (M.L.R.); (F.C.-P.); (C.A.V.-N.)
| | - Juan Carlos Cancino-Diaz
- Departamento de Microbiología, Escuela Nacional de Ciencias Biológicas del Instituto Politécnico Nacional, Salvador Díaz Mirón esq. Plan de San Luis S/N, Miguel Hidalgo, Casco de Santo Tomas, Ciudad de México 11340, Mexico;
| | - Liora Shoshani
- Department of Physiology, Biophysics and Neurosciences, CINVESTAV-IPN, 2508 IPN Ave., San Pedro Zacatenco, Ciudad de México 07360, Mexico; (M.L.R.); (F.C.-P.); (C.A.V.-N.)
- Correspondence: ; Tel.: +52-55-5747-3360
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117
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Lin YT, Lee TH. Rapid response of osmotic stress transcription factor 1 (OSTF1) expression to salinity challenge in gills of marine euryhaline milkfish (Chanos chanos). PLoS One 2022; 17:e0271029. [PMID: 35793350 PMCID: PMC9258805 DOI: 10.1371/journal.pone.0271029] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2022] [Accepted: 06/22/2022] [Indexed: 12/13/2022] Open
Abstract
Euryhaline teleosts can survive in environments with different salinities. Cortisol is an important hormone for acclimation to seawater (SW) of euryhaline teleosts. Osmotic stress transcription factor 1 (OSTF1), also called the transforming growth factor-beta stimulated clone 22 domain 3 (tsc22d3), was first reported in tilapia as an acute response gene and protein under hyperosmotic stress, and it is regulated by cortisol. To date, most studies on OSTF1 have focused on freshwater inhabitants, such as tilapia, medaka, and catadromous eel. The expression of OSTF1 and the correlation between OSTF1 and cortisol in marine inhabitant euryhaline teleosts, to our knowledge, remain unclear. This study reveals the changes in the expression levels of branchial OSTF1, plasma cortisol levels, and their correlation in the marine inhabitant milkfish with ambient salinities. The two sequences of milkfish TSC22D3 transcripts were classified as OSTF1a and OSTF1b. Both genes were expressed universally in all detected organs and tissues but were the most abundant in the liver. Similar gene expression levels of ostf1a and ostf1b were found in SW- and fresh water (FW)-acclimated milkfish gills, an important osmoregulatory organ. Within 12 hours of being transferred from FW to SW, the gene expression level of ostf1b increased significantly (4 folds) within 12 h, whereas the expression level of ostf1a remained constant. Moreover, cortisol levels increased rapidly after being transferred to a hyperosmotic environment. After an intraperitoneal injection of cortisol, the gene expression levels of ostf1a and ostf1b were elevated. However, under hyperosmotic stress, ostf1a gene expression remained stable. Overall, the results revealed that ostf1b was the primary gene in milkfish responding to hypertonic stress, and cortisol concentration increased after the transfer of milkfish from FW to SW. Furthermore, cortisol injection increased the expression of ostf1a and ostf1b. As a result, factors other than cortisol may activate ostf1b in milkfish gills in response to an environmental salinity challenge.
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Affiliation(s)
- Yu-Ting Lin
- Department of Life Sciences, National Chung Hsing University, Taichung, Taiwan
- The iEGG and Animal Biotechnology Center, National Chung Hsing University, Taichung, Taiwan
| | - Tsung-Han Lee
- Department of Life Sciences, National Chung Hsing University, Taichung, Taiwan
- The iEGG and Animal Biotechnology Center, National Chung Hsing University, Taichung, Taiwan
- * E-mail:
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118
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Spontarelli K, Infield DT, Nielsen HN, Holm R, Young VC, Galpin JD, Ahern CA, Vilsen B, Artigas P. Role of a conserved ion-binding site tyrosine in ion selectivity of the Na+/K+ pump. J Gen Physiol 2022; 154:e202113039. [PMID: 35657726 PMCID: PMC9171065 DOI: 10.1085/jgp.202113039] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2021] [Revised: 04/19/2022] [Accepted: 05/16/2022] [Indexed: 01/07/2023] Open
Abstract
The essential transmembrane Na+ and K+ gradients in animal cells are established by the Na+/K+ pump, a P-type ATPase that exports three Na+ and imports two K+ per ATP hydrolyzed. The mechanism by which the Na+/K+ pump distinguishes between Na+ and K+ at the two membrane sides is poorly understood. Crystal structures identify two sites (sites I and II) that bind Na+ or K+ and a third (site III) specific for Na+. The side chain of a conserved tyrosine at site III of the catalytic α-subunit (Xenopus-α1 Y780) has been proposed to contribute to Na+ binding by cation-π interaction. We substituted Y780 with natural and unnatural amino acids, expressed the mutants in Xenopus oocytes and COS-1 cells, and used electrophysiology and biochemistry to evaluate their function. Substitutions disrupting H-bonds impaired Na+ interaction, while Y780Q strengthened it, likely by H-bond formation. Utilizing the non-sense suppression method previously used to incorporate unnatural derivatives in ion channels, we were able to analyze Na+/K+ pumps with fluorinated tyrosine or phenylalanine derivatives inserted at position 780 to diminish cation-π interaction strength. In line with the results of the analysis of mutants with natural amino acid substitutions, the results with the fluorinated derivatives indicate that Na+-π interaction with the phenol ring at position 780 contributes minimally, if at all, to the binding of Na+. All Y780 substitutions decreased K+ apparent affinity, highlighting that a state-dependent H-bond network is essential for the selectivity switch at sites I and II when the pump changes conformational state.
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Affiliation(s)
- Kerri Spontarelli
- Department of Cell Physiology and Molecular Biophysics, Center for Membrane Protein Research, Texas Tech University Health Sciences Center, Lubbock, TX
| | - Daniel T. Infield
- Department of Molecular Physiology and Biophysics, University of Iowa, Iowa City, IA
| | - Hang N. Nielsen
- Department of Biomedicine, Aarhus University, Aarhus C, Denmark
| | - Rikke Holm
- Department of Biomedicine, Aarhus University, Aarhus C, Denmark
| | - Victoria C. Young
- Department of Cell Physiology and Molecular Biophysics, Center for Membrane Protein Research, Texas Tech University Health Sciences Center, Lubbock, TX
| | - Jason D. Galpin
- Department of Molecular Physiology and Biophysics, University of Iowa, Iowa City, IA
| | - Christopher A. Ahern
- Department of Molecular Physiology and Biophysics, University of Iowa, Iowa City, IA
| | - Bente Vilsen
- Department of Biomedicine, Aarhus University, Aarhus C, Denmark
| | - Pablo Artigas
- Department of Cell Physiology and Molecular Biophysics, Center for Membrane Protein Research, Texas Tech University Health Sciences Center, Lubbock, TX
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Short B. How a tyrosine primes the pump. J Gen Physiol 2022; 154:213284. [PMID: 35703917 DOI: 10.1085/jgp.202213199] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
JGP study uses both natural and unnatural amino acid substitutions to examine how a key tyrosine residue controls the selectivity of the Na+/K+ pump.
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Udoh UAS, Banerjee M, Rajan PK, Sanabria JD, Smith G, Schade M, Sanabria JA, Nakafuku Y, Sodhi K, Pierre SV, Shapiro JI, Sanabria JR. Tumor-Suppressor Role of the α1-Na/K-ATPase Signalosome in NASH Related Hepatocellular Carcinoma †. Int J Mol Sci 2022; 23:ijms23137359. [PMID: 35806364 PMCID: PMC9266688 DOI: 10.3390/ijms23137359] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2022] [Revised: 06/24/2022] [Accepted: 06/29/2022] [Indexed: 02/07/2023] Open
Abstract
Hepatocellular carcinoma (HCC) is the second leading cause of cancer-related mortality worldwide, with an estimate of 0.84 million cases every year. In Western countries, because of the obesity epidemic, non-alcoholic steatohepatitis (NASH) has become the major cause of HCC. Intriguingly, the molecular mechanisms underlying tumorigenesis of HCC from NASH are largely unknown. We hypothesized that the growing uncoupled metabolism during NASH progression to HCC, manifested by lower cell redox status and an apoptotic ‘switch’ activity, follows a dysregulation of α1-Na/K-ATPase (NKA)/Src signalosome. Our results suggested that in NASH-related malignancy, α1-NKA signaling causes upregulation of the anti-apoptotic protein survivin and downregulation of the pro-apoptotic protein Smac/DIABLO via the activation of the PI3K → Akt pro-survival pathway with concomitant inhibition of the FoxO3 circuit, favoring cell division and primary liver carcinogenesis. Signalosome normalization using an inhibitory peptide resets apoptotic activity in malignant cells, with a significant decrease in tumor burden in vivo. Therefore, α1-NKA signalosome exercises in HCC the characteristic of a tumor suppressor, suggesting α1-NKA as a putative target for clinical therapy.
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Affiliation(s)
- Utibe-Abasi S. Udoh
- Department of Surgery, Marshall University Joan C. Edwards School of Medicine, Huntington, WV 25701, USA; (U.-A.S.U.); (M.B.); (P.K.R.); (J.D.S.); (G.S.); (M.S.); (J.A.S.); (Y.N.); (K.S.); (J.I.S.)
- Marshall Institute for Interdisciplinary Research, Marshall University Joan C. Edwards School of Medicine, Huntington, WV 25703, USA;
| | - Moumita Banerjee
- Department of Surgery, Marshall University Joan C. Edwards School of Medicine, Huntington, WV 25701, USA; (U.-A.S.U.); (M.B.); (P.K.R.); (J.D.S.); (G.S.); (M.S.); (J.A.S.); (Y.N.); (K.S.); (J.I.S.)
- Marshall Institute for Interdisciplinary Research, Marshall University Joan C. Edwards School of Medicine, Huntington, WV 25703, USA;
| | - Pradeep K. Rajan
- Department of Surgery, Marshall University Joan C. Edwards School of Medicine, Huntington, WV 25701, USA; (U.-A.S.U.); (M.B.); (P.K.R.); (J.D.S.); (G.S.); (M.S.); (J.A.S.); (Y.N.); (K.S.); (J.I.S.)
- Marshall Institute for Interdisciplinary Research, Marshall University Joan C. Edwards School of Medicine, Huntington, WV 25703, USA;
| | - Juan D. Sanabria
- Department of Surgery, Marshall University Joan C. Edwards School of Medicine, Huntington, WV 25701, USA; (U.-A.S.U.); (M.B.); (P.K.R.); (J.D.S.); (G.S.); (M.S.); (J.A.S.); (Y.N.); (K.S.); (J.I.S.)
- Marshall Institute for Interdisciplinary Research, Marshall University Joan C. Edwards School of Medicine, Huntington, WV 25703, USA;
| | - Gary Smith
- Department of Surgery, Marshall University Joan C. Edwards School of Medicine, Huntington, WV 25701, USA; (U.-A.S.U.); (M.B.); (P.K.R.); (J.D.S.); (G.S.); (M.S.); (J.A.S.); (Y.N.); (K.S.); (J.I.S.)
- Marshall Institute for Interdisciplinary Research, Marshall University Joan C. Edwards School of Medicine, Huntington, WV 25703, USA;
| | - Mathew Schade
- Department of Surgery, Marshall University Joan C. Edwards School of Medicine, Huntington, WV 25701, USA; (U.-A.S.U.); (M.B.); (P.K.R.); (J.D.S.); (G.S.); (M.S.); (J.A.S.); (Y.N.); (K.S.); (J.I.S.)
- Marshall Institute for Interdisciplinary Research, Marshall University Joan C. Edwards School of Medicine, Huntington, WV 25703, USA;
| | - Jacqueline A. Sanabria
- Department of Surgery, Marshall University Joan C. Edwards School of Medicine, Huntington, WV 25701, USA; (U.-A.S.U.); (M.B.); (P.K.R.); (J.D.S.); (G.S.); (M.S.); (J.A.S.); (Y.N.); (K.S.); (J.I.S.)
- Marshall Institute for Interdisciplinary Research, Marshall University Joan C. Edwards School of Medicine, Huntington, WV 25703, USA;
| | - Yuto Nakafuku
- Department of Surgery, Marshall University Joan C. Edwards School of Medicine, Huntington, WV 25701, USA; (U.-A.S.U.); (M.B.); (P.K.R.); (J.D.S.); (G.S.); (M.S.); (J.A.S.); (Y.N.); (K.S.); (J.I.S.)
- Marshall Institute for Interdisciplinary Research, Marshall University Joan C. Edwards School of Medicine, Huntington, WV 25703, USA;
| | - Komal Sodhi
- Department of Surgery, Marshall University Joan C. Edwards School of Medicine, Huntington, WV 25701, USA; (U.-A.S.U.); (M.B.); (P.K.R.); (J.D.S.); (G.S.); (M.S.); (J.A.S.); (Y.N.); (K.S.); (J.I.S.)
- Marshall Institute for Interdisciplinary Research, Marshall University Joan C. Edwards School of Medicine, Huntington, WV 25703, USA;
| | - Sandrine V. Pierre
- Marshall Institute for Interdisciplinary Research, Marshall University Joan C. Edwards School of Medicine, Huntington, WV 25703, USA;
| | - Joseph I. Shapiro
- Department of Surgery, Marshall University Joan C. Edwards School of Medicine, Huntington, WV 25701, USA; (U.-A.S.U.); (M.B.); (P.K.R.); (J.D.S.); (G.S.); (M.S.); (J.A.S.); (Y.N.); (K.S.); (J.I.S.)
- Marshall Institute for Interdisciplinary Research, Marshall University Joan C. Edwards School of Medicine, Huntington, WV 25703, USA;
| | - Juan R. Sanabria
- Department of Surgery, Marshall University Joan C. Edwards School of Medicine, Huntington, WV 25701, USA; (U.-A.S.U.); (M.B.); (P.K.R.); (J.D.S.); (G.S.); (M.S.); (J.A.S.); (Y.N.); (K.S.); (J.I.S.)
- Marshall Institute for Interdisciplinary Research, Marshall University Joan C. Edwards School of Medicine, Huntington, WV 25703, USA;
- Department of Nutrition and Metabolomic Core Facility, Case Western Reserve University School of Medicine, Cleveland, OH 44106, USA
- Correspondence: or
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Liu J, Chaudhry M, Bai F, Chuang J, Chaudhry H, Al-Astal AEY, Nie Y, Sollars V, Sodhi K, Seligman P, Shapiro JI. Blockage of the Na-K-ATPase signaling-mediated oxidant amplification loop elongates red blood cell half-life and ameliorates uremic anemia induced by 5/6th PNx in C57BL/6 mice. Am J Physiol Renal Physiol 2022; 322:F655-F666. [PMID: 35435001 PMCID: PMC9076417 DOI: 10.1152/ajprenal.00189.2021] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2021] [Revised: 03/21/2022] [Accepted: 04/06/2022] [Indexed: 11/22/2022] Open
Abstract
We have previously demonstrated that the Na-K-ATPase signaling-mediated oxidant amplification loop contributes to experimental uremic cardiomyopathy and anemia induced by 5/6th partial nephrectomy (PNx). This process can be ameliorated by systemic administration of the peptide pNaKtide, which was designed to block this oxidant amplification loop. The present study demonstrated that the PNx-induced anemia is characterized by marked decreases in red blood cell (RBC) survival as assessed by biotinylated RBC clearance and eryptosis as assessed by annexin V binding. No significant change in iron homeostasis was observed. Examination of plasma samples demonstrated that PNx induced significant increases in systemic oxidant stress as assessed by protein carbonylation, plasma erythropoietin concentration, and blood urea nitrogen. Systemic administration of pNaKtide, but not NaKtide (pNaKtide without the TAT leader sequence) and a scramble "pNaKtide" (sc-pNaKtide), led to the normalization of hematocrit, RBC survival, and plasma protein carbonylation. Administration of the three peptides had no significant effect on PNx-induced increases in plasma erythropoietin and blood urea nitrogen without notable changes in iron metabolism. These data indicate that blockage of the Na-K-ATPase signaling-mediated oxidant amplification loop ameliorates the anemia of experimental renal failure by increasing RBC survival.NEW & NOTEWORTHY The anemia of CKD is multifactorial, and the current treatment based primarily on stimulating bone marrow production of RBCs with erythropoietin or erythropoietin analogs is unsatisfactory. In a murine model of CKD that is complicated by anemia, blockade of Na-K-ATPase signaling with a specific peptide (pNaKtide) ameliorated the anemia primarily by increasing RBC survival. Should these results be confirmed in patients, this strategy may allow for novel and potentially additive strategies to treat the anemia of CKD.
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Affiliation(s)
- Jiang Liu
- Department of Biomedical Sciences, Joan C. Edwards School of Medicine, Marshall University, Huntington, West Virginia
| | - Muhammad Chaudhry
- Department of Biomedical Sciences, Joan C. Edwards School of Medicine, Marshall University, Huntington, West Virginia
| | - Fang Bai
- Department of Biomedical Sciences, Joan C. Edwards School of Medicine, Marshall University, Huntington, West Virginia
| | - Justin Chuang
- Department of Medicine, Joan C. Edwards School of Medicine, Marshall University, Huntington, West Virginia
| | - Hibba Chaudhry
- Department of Biomedical Sciences, Joan C. Edwards School of Medicine, Marshall University, Huntington, West Virginia
| | - Ala-Eddin Yassin Al-Astal
- Department of Biomedical Sciences, Joan C. Edwards School of Medicine, Marshall University, Huntington, West Virginia
| | - Ying Nie
- Department of Biomedical Sciences, Joan C. Edwards School of Medicine, Marshall University, Huntington, West Virginia
| | - Vincent Sollars
- Department of Biomedical Sciences, Joan C. Edwards School of Medicine, Marshall University, Huntington, West Virginia
| | - Komal Sodhi
- Department of Surgery, Joan C. Edwards School of Medicine, Marshall University, Huntington, West Virginia
| | - Paul Seligman
- Department of Medicine, University of Colorado School of Medicine, Aurora, Colorado
| | - Joseph I Shapiro
- Department of Medicine, Joan C. Edwards School of Medicine, Marshall University, Huntington, West Virginia
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Chen YI, Chang CC, Hsu MF, Jeng YM, Tien YW, Chang MC, Chang YT, Hu CM, Lee WH. Homophilic ATP1A1 binding induces activin A secretion to promote EMT of tumor cells and myofibroblast activation. Nat Commun 2022; 13:2945. [PMID: 35618735 PMCID: PMC9135720 DOI: 10.1038/s41467-022-30638-4] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2021] [Accepted: 05/09/2022] [Indexed: 12/30/2022] Open
Abstract
Tumor cells with diverse phenotypes and biological behaviors are influenced by stromal cells through secretory factors or direct cell-cell contact. Pancreatic ductal adenocarcinoma (PDAC) is characterized by extensive desmoplasia with fibroblasts as the major cell type. In the present study, we observe enrichment of myofibroblasts in a juxta-tumoral position with tumor cells undergoing epithelial-mesenchymal transition (EMT) that facilitates invasion and correlates with a worse clinical prognosis in PDAC patients. Direct cell-cell contacts forming heterocellular aggregates between fibroblasts and tumor cells are detected in primary pancreatic tumors and circulating tumor microemboli (CTM). Mechanistically, ATP1A1 overexpressed in tumor cells binds to and reorganizes ATP1A1 of fibroblasts that induces calcium oscillations, NF-κB activation, and activin A secretion. Silencing ATP1A1 expression or neutralizing activin A secretion suppress tumor invasion and colonization. Taken together, these results elucidate the direct interplay between tumor cells and bound fibroblasts in PDAC progression, thereby providing potential therapeutic opportunities for inhibiting metastasis by interfering with these cell-cell interactions.
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Affiliation(s)
- Yi-Ing Chen
- Genomics Research Center, Academia Sinica, Taipei, Taiwan
| | - Chin-Chun Chang
- Genomics Research Center, Academia Sinica, Taipei, Taiwan
- Master Program for Cancer Biology and Drug Discovery, China Medical University and Academia Sinica, Taichung, Taiwan
| | - Min-Fen Hsu
- Genomics Research Center, Academia Sinica, Taipei, Taiwan
| | - Yung-Ming Jeng
- Department of Pathology, National Taiwan University Hospital, Graduate Institute of Pathology, College of Medicine, National Taiwan University, Taipei, Taiwan
| | - Yu-Wen Tien
- Department of Surgery, National Taiwan University Hospital, College of Medicine, National Taiwan University, Taipei, Taiwan
| | - Ming-Chu Chang
- Department of Internal Medicine, College of Medicine, National Taiwan University, Taipei, Taiwan
- Department of Internal Medicine, National Taiwan University Hospital, Taipei, Taiwan
| | - Yu-Ting Chang
- Department of Internal Medicine, College of Medicine, National Taiwan University, Taipei, Taiwan
- Department of Internal Medicine, National Taiwan University Hospital, Taipei, Taiwan
| | - Chun-Mei Hu
- Genomics Research Center, Academia Sinica, Taipei, Taiwan.
| | - Wen-Hwa Lee
- Genomics Research Center, Academia Sinica, Taipei, Taiwan.
- Drug Development Center, China Medical University, Taichung, Taiwan.
- Department of Biological Chemistry, University of California, Irvine, USA.
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123
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Nanao Y, Oki K, Kobuke K, Itcho K, Baba R, Kodama T, Otagaki Y, Okada A, Yoshii Y, Nagano G, Ohno H, Arihiro K, Gomez-Sanchez CE, Hattori N, Yoneda M. Hypomethylation associated vitamin D receptor expression in ATP1A1 mutant aldosterone-producing adenoma. Mol Cell Endocrinol 2022; 548:111613. [PMID: 35257799 PMCID: PMC9082579 DOI: 10.1016/j.mce.2022.111613] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/06/2022] [Revised: 02/25/2022] [Accepted: 03/01/2022] [Indexed: 12/25/2022]
Abstract
DNA methylation alteration is tissue-specific and play a pivotal role in regulating gene transcription during cell proliferation and survival. We aimed to detect genes regulated by DNA methylation, and then investigated whether the gene influenced cell proliferation or survival in adrenal cells. DNA methylation and qPCR analyses were performed in nonfunctioning adrenocortical adenoma (NFA, n = 12) and aldosterone-producing adenoma (APA, n = 35) samples. The VDR gene promoter was markedly hypomethylated in APA with ATP1A1 mutation, and the promoter methylation levels showed a significant inverse association with the transcripts in APA. ATP1A1 mutation led to VDR transcription in HAC15 cells, and VDR suppression abrogated ATP1A1 mutation-mediated cell proliferation in HAC15 cells. We demonstrated that APA with ATP1A1 mutation showed entire hypomethylation in the VDR promoter and abundant VDR mRNA and protein expression. VDR suppression abrogated ATP1A1 mutation-mediated cell proliferation in HAC15 cells. Abundant VDR expression would be essential for ATP1A1 mutation-mediated cell proliferation.
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Affiliation(s)
- Yuta Nanao
- Department of Molecular and Internal Medicine, Graduate School of Biomedical and Health Sciences, Hiroshima University, Hiroshima, Japan
| | - Kenji Oki
- Department of Molecular and Internal Medicine, Graduate School of Biomedical and Health Sciences, Hiroshima University, Hiroshima, Japan.
| | - Kazuhiro Kobuke
- Department of Molecular and Internal Medicine, Graduate School of Biomedical and Health Sciences, Hiroshima University, Hiroshima, Japan
| | - Kiyotaka Itcho
- Department of Molecular and Internal Medicine, Graduate School of Biomedical and Health Sciences, Hiroshima University, Hiroshima, Japan
| | - Ryuta Baba
- Department of Molecular and Internal Medicine, Graduate School of Biomedical and Health Sciences, Hiroshima University, Hiroshima, Japan
| | - Takaya Kodama
- Department of Molecular and Internal Medicine, Graduate School of Biomedical and Health Sciences, Hiroshima University, Hiroshima, Japan
| | - Yu Otagaki
- Department of Molecular and Internal Medicine, Graduate School of Biomedical and Health Sciences, Hiroshima University, Hiroshima, Japan
| | - Akira Okada
- Department of Molecular and Internal Medicine, Graduate School of Biomedical and Health Sciences, Hiroshima University, Hiroshima, Japan
| | - Yoko Yoshii
- Department of Molecular and Internal Medicine, Graduate School of Biomedical and Health Sciences, Hiroshima University, Hiroshima, Japan
| | - Gaku Nagano
- Department of Molecular and Internal Medicine, Graduate School of Biomedical and Health Sciences, Hiroshima University, Hiroshima, Japan
| | - Haruya Ohno
- Department of Molecular and Internal Medicine, Graduate School of Biomedical and Health Sciences, Hiroshima University, Hiroshima, Japan
| | - Koji Arihiro
- Department of Anatomical Pathology, Hiroshima University Hospital, Hiroshima, Japan
| | - Celso E Gomez-Sanchez
- Division of Endocrinology, G.V. (Sonny) Montgomery VA Medical Center and University of Mississippi Medical Center, Jackson, MS, USA
| | - Noboru Hattori
- Department of Molecular and Internal Medicine, Graduate School of Biomedical and Health Sciences, Hiroshima University, Hiroshima, Japan
| | - Masayasu Yoneda
- Department of Molecular and Internal Medicine, Graduate School of Biomedical and Health Sciences, Hiroshima University, Hiroshima, Japan
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Khundmiri SJ, Ecelbarger CM, Amponsem J, Ji H, Sandberg K, Lee DL. PPAR-α knockout leads to elevated blood pressure response to angiotensin II infusion associated with an increase in renal α-1 Na +/K + ATPase protein expression and activity. Life Sci 2022; 296:120444. [PMID: 35245523 PMCID: PMC8969884 DOI: 10.1016/j.lfs.2022.120444] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2021] [Revised: 02/15/2022] [Accepted: 02/26/2022] [Indexed: 01/13/2023]
Abstract
Peroxisome proliferator activated receptor alpha (PPAR-α) deletion has been shown to increase blood pressure (BP). We hypothesized that the BP increase in PPAR-α KO mice was mediated by increased expression and activity of basolateral Na+/K+ ATPase (NKA) pump. To address this hypothesis, we treated wild-type (WT) and PPAR-α knockout (KO) mice with a slow-pressor dose of angiotensin II (400 ng/kg·min) for 12 days by osmotic minipump. Radiotelemetry showed no significant differences in baseline mean arterial pressure (MAP) between WT and PPAR-α KO mice; however, by day 12 of infusion, MAP was significantly higher in PPAR-α KO mice (156 ± 16) compared to WT mice (138 ± 11 mmHg). NKA activity and protein expression (α1 subunit) were significantly higher in PPAR-α KO mice compared to WT mice. There was no significant difference in NKA mRNA levels. Angiotensin II further increased the expression and activity of the NKA in both genotypes along with the water channel, aquaporin 1 (Aqp1). In contrast, angiotensin II decreased the expression (64-97% reduction in band density) of sodium‑hydrogen exchanger-3 (NHE3), NHE regulatory factor-1 (NHERF1, Slc9a3r1), sodium‑potassium-2-chloride cotransporter (NKCC2), and epithelial sodium channel (ENaC) β- and γ- subunits in the renal cortex of both WT and PPAR-α KO mice, with no difference between genotypes. The sodium-chloride cotransporter (NCC) was also decreased by angiotensin II, but significantly more in PPAR-α KO (59% WT versus 77% KO reduction from their respective vehicle-treated mice). Our results suggest that PPAR-α attenuates angiotensin II-mediated increased blood pressure potentially via reducing expression and activity of the NKA.
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Affiliation(s)
- Syed J Khundmiri
- Department of Physiology and Biophysics, College of Medicine, Howard University, Washington, DC, USA.
| | - Carolyn M Ecelbarger
- Division of Endocrinology and Metabolism, Department of Medicine, Georgetown University Washington, DC, USA
| | - Joycemary Amponsem
- Department of Physiology and Biophysics, College of Medicine, Howard University, Washington, DC, USA
| | - Hong Ji
- Department of Medicine, Georgetown University Washington, DC, USA
| | - Kathryn Sandberg
- Department of Medicine, Georgetown University Washington, DC, USA
| | - Dexter L Lee
- Department of Physiology and Biophysics, College of Medicine, Howard University, Washington, DC, USA.
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Li Y, Liu Z, Jiang Q, Ye Y, Zhao Y. Effects of nanoplastic on cell apoptosis and ion regulation in the gills of Macrobrachium nipponense. Environ Pollut 2022; 300:118989. [PMID: 35157932 DOI: 10.1016/j.envpol.2022.118989] [Citation(s) in RCA: 18] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/27/2021] [Revised: 01/24/2022] [Accepted: 02/10/2022] [Indexed: 06/14/2023]
Abstract
Nanoplastic, ubiquitous in aquatic environments, are raising concern worldwide. However, studies on nanoplastic exposure and its effects on ion transport in aquatic organisms are limited. In this study, the juvenile oriental river shrimp, Macrobrachium nipponense, was exposed to five levels of nanoplastic concentrations (0, 5, 10, 20, 40 mg/L) in order to evaluate cell viability, ion content, ion transport, ATPase activity, and related gene expression. The results showed that the apoptosis rate was higher in the high concentration nanoplastic group (40 mg/L) compared to the low concentration nanoplastic group (5 mg/L) and the control group (0 mg/L). The ion content of sodium (Na+), potassium (K+), chloride (Cl-), and calcium (Ca2+) showed a decreasing trend in gill tissue compared to the control group. The Na+K+-ATPase, V(H)-ATPase, Ca2+Mg2+-ATPase, and total ATPase activities in the gills of M. nipponense showed a general decrease with the increasement of nanoplastic concentration and time of exposure. When increasing nanoplastic concentration, the expression of ion transport-related genes in the gills of M. nipponense showed first rise then descend trend. As elucidated by the results, high nanoplastic concentrations have negative effect on cell viability, ion content, ion transport ATPase activity, and ion transport-related gene expression in the gills of M. nipponense. This research provides a theoretical foundation for the toxic effects of nanoplastic in aquaculture.
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Affiliation(s)
- Yiming Li
- School of Life Science, East China Normal University, Shanghai, 200241, China
| | - Zhiquan Liu
- School of Life and Environmental Sciences, Hangzhou Normal University, 310018, Hangzhou, Zhejiang, China
| | - Qichen Jiang
- Freshwater Fisheries Research Institute of Jiangsu Province, Nanjing, 210017, China
| | - Yucong Ye
- School of Life Science, East China Normal University, Shanghai, 200241, China
| | - Yunlong Zhao
- School of Life Science, East China Normal University, Shanghai, 200241, China; State Key Laboratory of Estuarine and Coastal Research, East China Normal University, Shanghai, 200241, China.
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Olona A, Hateley C, Guerrero A, Ko JH, Johnson MR, Anand PK, Thomas D, Gil J, Behmoaras J. Cardiac glycosides cause cytotoxicity in human macrophages and ameliorate white adipose tissue homeostasis. Br J Pharmacol 2022; 179:1874-1886. [PMID: 33665823 DOI: 10.1111/bph.15423] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2020] [Revised: 01/25/2021] [Accepted: 02/05/2021] [Indexed: 12/18/2022] Open
Abstract
BACKGROUND AND PURPOSE Cardiac glycosides inhibit Na+ /K+ -ATPase and are used to treat heart failure and arrhythmias. They can induce inflammasome activation and pyroptosis in macrophages, suggesting cytotoxicity, which remains to be elucidated in human tissues. EXPERIMENTAL APPROACH To determine the cell-type specificity of this cytotoxicity, we used human monocyte-derived macrophages and non-adherent peripheral blood cells from healthy donors, plus omental white adipose tissue, stromal vascular fraction-derived pre-adipocytes and adipocytes from obese patients undergoing bariatric surgery. All these cells/tissues were treated with nanomolar concentrations of ouabain (50, 100, 500 nM) to investigate the level of cytotoxicity and the mechanisms leading to cell death. In white adipose tissue, we investigated ouabain-mediated cytotoxicity by measuring insulin sensitivity, adipose tissue function and extracellular matrix deposition ex vivo. KEY RESULTS Ouabain induced cell death through pyroptosis and apoptosis, and was more effective in monocyte-derived macrophages compared to non-adherent peripheral blood mononuclear cell populations. This cytotoxicity is dependent on K+ flux, as ouabain causes intracellular depletion of K+ and accumulation of Na+ and Ca2+ . Consistently, the cell death caused by these ion imbalances can be rescued by addition of potassium chloride to human monocyte-derived macrophages. Remarkably, when white adipose tissue explants from obese patients are cultured with nanomolar concentrations of ouabain, this causes depletion of macrophages, down-regulation of type VI collagen levels and amelioration of insulin sensitivity ex vivo. CONCLUSION AND IMPLICATIONS The use of nanomolar concentration of cardiac glycosides could be an attractive therapeutic treatment for metabolic syndrome, characterized by pathogenic infiltration and activation of macrophages. LINKED ARTICLES This article is part of a themed issue on Inflammation, Repair and Ageing. To view the other articles in this section visit http://onlinelibrary.wiley.com/doi/10.1111/bph.v179.9/issuetoc.
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Affiliation(s)
- Antoni Olona
- Centre for Inflammatory Disease, Imperial College London, Hammersmith Hospital, London, UK
| | - Charlotte Hateley
- Centre for Inflammatory Disease, Imperial College London, Hammersmith Hospital, London, UK
| | - Ana Guerrero
- MRC London Institute of Medical Sciences (LMS), London, UK
- Institute of Clinical Sciences (ICS), Faculty of Medicine, Imperial College London, London, UK
| | - Jeong-Hun Ko
- Centre for Inflammatory Disease, Imperial College London, Hammersmith Hospital, London, UK
| | | | - Paras K Anand
- Department of Infectious Disease, Imperial College London, Hammersmith Hospital, London, UK
| | - David Thomas
- Centre for Inflammatory Disease, Imperial College London, Hammersmith Hospital, London, UK
| | - Jesus Gil
- MRC London Institute of Medical Sciences (LMS), London, UK
- Institute of Clinical Sciences (ICS), Faculty of Medicine, Imperial College London, London, UK
| | - Jacques Behmoaras
- Centre for Inflammatory Disease, Imperial College London, Hammersmith Hospital, London, UK
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Seflova J, Habibi NR, Yap JQ, Cleary SR, Fang X, Kekenes-Huskey PM, Espinoza-Fonseca LM, Bossuyt JB, Robia SL. Fluorescence lifetime imaging microscopy reveals sodium pump dimers in live cells. J Biol Chem 2022; 298:101865. [PMID: 35339486 PMCID: PMC9048134 DOI: 10.1016/j.jbc.2022.101865] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2021] [Revised: 03/08/2022] [Accepted: 03/10/2022] [Indexed: 12/30/2022] Open
Abstract
The sodium-potassium ATPase (Na/K-ATPase, NKA) establishes ion gradients that facilitate many physiological functions including action potentials and secondary transport processes. NKA comprises a catalytic subunit (alpha) that interacts closely with an essential subunit (beta) and regulatory transmembrane micropeptides called FXYD proteins. In the heart, a key modulatory partner is the FXYD protein phospholemman (PLM, FXYD1), but the stoichiometry of the alpha-beta-PLM regulatory complex is unknown. Here, we used fluorescence lifetime imaging and spectroscopy to investigate the structure, stoichiometry, and affinity of the NKA-regulatory complex. We observed a concentration-dependent binding of the subunits of NKA-PLM regulatory complex, with avid association of the alpha subunit with the essential beta subunit as well as lower affinity alpha-alpha and alpha-PLM interactions. These data provide the first evidence that, in intact live cells, the regulatory complex is composed of two alpha subunits associated with two beta subunits, decorated with two PLM regulatory subunits. Docking and molecular dynamics (MD) simulations generated a structural model of the complex that is consistent with our experimental observations. We propose that alpha-alpha subunit interactions support conformational coupling of the catalytic subunits, which may enhance NKA turnover rate. These observations provide insight into the pathophysiology of heart failure, wherein low NKA expression may be insufficient to support formation of the complete regulatory complex with the stoichiometry (alpha-beta-PLM)2.
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Affiliation(s)
- Jaroslava Seflova
- Department of Cell and Molecular Physiology, Loyola University Chicago, Maywood, Illinois, USA
| | - Nima R Habibi
- Department of Pharmacology, University of California Davis, Davis, California, USA
| | - John Q Yap
- Department of Cell and Molecular Physiology, Loyola University Chicago, Maywood, Illinois, USA
| | - Sean R Cleary
- Department of Cell and Molecular Physiology, Loyola University Chicago, Maywood, Illinois, USA
| | - Xuan Fang
- Department of Cell and Molecular Physiology, Loyola University Chicago, Maywood, Illinois, USA
| | - Peter M Kekenes-Huskey
- Department of Cell and Molecular Physiology, Loyola University Chicago, Maywood, Illinois, USA
| | - L Michel Espinoza-Fonseca
- Division of Cardiovascular Medicine, Department of Internal Medicine, Center for Arrhythmia Research, University of Michigan, Ann Arbor, Michigan, USA
| | - Julie B Bossuyt
- Department of Pharmacology, University of California Davis, Davis, California, USA.
| | - Seth L Robia
- Department of Cell and Molecular Physiology, Loyola University Chicago, Maywood, Illinois, USA.
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Garçon DP, Fabri LM, Moraes CM, Costa MIC, Freitas RS, McNamara JC, Leone FA. Effects of ammonia on gill (Na +, K +)-ATPase kinetics in a hololimnetic population of the Amazon River shrimp Macrobrachium amazonicum. Aquat Toxicol 2022; 246:106144. [PMID: 35339850 DOI: 10.1016/j.aquatox.2022.106144] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/14/2021] [Revised: 03/04/2022] [Accepted: 03/12/2022] [Indexed: 06/14/2023]
Abstract
Water quality is essential for successful aquaculture. For freshwater shrimp farming, ammonia concentrations can increase considerably, even when culture water is renewed frequently, consequently increasing the risk of ammonia intoxication. We investigated ammonia lethality (LC50-96 h) in a hololimnetic population of the Amazon River shrimp Macrobrachium amazonicum from the Paraná/Paraguay River basin, including the effects of exposure to 4.93 mg L-1 total ammonia concentration on gill (Na+, K+)-ATPase activity. The mean LC50-96 h was 49.27 mg L-1 total ammonia, corresponding to 1.8 mg L-1 un-ionized ammonia. Except for NH4+ affinity that increased 2.5-fold, that of the gill (Na+, K+)-ATPase for ATP, Mg2+, Na+, K+ and ouabain was unchanged after ammonia exposure. Western blotting of gill microsomal preparations from fresh caught shrimps showed a single immunoreactive band of ≈110 kDa, corresponding to the gill (Na+, K+)-ATPase α-subunit. Ammonia exposure increased (Na+, K+)-ATPase activity by ≈25%, coincident with an additional 130 kDa α-subunit immunoreactive band, and increased K+-stimulated and V(H+)-ATPase activities by ≈2.5-fold. Macrobrachium amazonicum from the Paraná/Paraguay River basin is as tolerant to ammonia as are other Amazon River basins populations, showing toxicity comparable to that of marine crustaceans.
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Affiliation(s)
- Daniela P Garçon
- Campus Universitário de Iturama, Universidade Federal do Triângulo Mineiro, Iturama, MG, Brasil
| | - Leonardo M Fabri
- Departamento de Bioquímica e Imunologia, Faculdade de Medicina de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, SP, Brazil
| | - Cintya M Moraes
- Departamento de Bioquímica e Imunologia, Faculdade de Medicina de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, SP, Brazil
| | - Maria Izabel C Costa
- Departamento de Química, Faculdade de Filosofia, Ciências e Letras de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, SP, Brasil
| | - Renata S Freitas
- Campus Universitário de Iturama, Universidade Federal do Triângulo Mineiro, Iturama, MG, Brasil
| | - John C McNamara
- Departamento de Biologia, Faculdade de Filosofia, Ciências e Letras de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, SP, Brasil; Centro de Biologia Marinha, Universidade de São Paulo, São Sebastião, SP, Brasil
| | - Francisco A Leone
- Departamento de Química, Faculdade de Filosofia, Ciências e Letras de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, SP, Brasil.
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Shih SW, Yan JJ, Tsou YL, Lu SW, Wang MC, Chou MY, Hwang PP. In Vivo Functional Assay in Fish Gills: Exploring Branchial Acid-Excreting Mechanisms in Zebrafish. Int J Mol Sci 2022; 23:ijms23084419. [PMID: 35457237 PMCID: PMC9031880 DOI: 10.3390/ijms23084419] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2022] [Revised: 04/13/2022] [Accepted: 04/14/2022] [Indexed: 02/06/2023] Open
Abstract
Molecular and physiological analyses in ionoregulatory organs (e.g., adult gills and embryonic skin) are essential for studying fish ion regulation. Recent progress in the molecular physiology of fish ion regulation was mostly obtained in embryonic skin; however, studies of ion regulation in adult gills are still elusive and limited because there are no direct methods for in vivo functional assays in the gills. The present study applied the scanning ion-selective electrode technique (SIET) in adult gills to investigate branchial H+-excreting functions in vivo. We removed the opercula from zebrafish and then performed long-term acid acclimation experiments. The results of Western blot and immunofluorescence showed that the protein expression of H+-ATPase (HA) and the number of H+-ATPase-rich ionocytes were increased under acidic situations. The SIET results proved that the H+ excretion capacity is indeed enhanced in the gills acclimated to acidic water. In addition, both HA and Na+/H+ exchanger (Nhe) inhibitors suppressed the branchial H+ excretion capacity, suggesting that H+ is excreted in association with HA and Nhe in zebrafish gills. These results demonstrate that SIET is effective for in vivo detection in fish gills, representing a breakthrough approach for studying the molecular physiology of fish ion regulation.
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Affiliation(s)
- Shang-Wu Shih
- Institute of Cellular and Organismic Biology, Academia Sinica, Taipei 11529, Taiwan; (S.-W.S.); (J.-J.Y.); (Y.-L.T.); (S.-W.L.); (M.-C.W.)
- Department of Life Science, National Taiwan University, Taipei 10617, Taiwan;
| | - Jia-Jiun Yan
- Institute of Cellular and Organismic Biology, Academia Sinica, Taipei 11529, Taiwan; (S.-W.S.); (J.-J.Y.); (Y.-L.T.); (S.-W.L.); (M.-C.W.)
| | - Yi-Ling Tsou
- Institute of Cellular and Organismic Biology, Academia Sinica, Taipei 11529, Taiwan; (S.-W.S.); (J.-J.Y.); (Y.-L.T.); (S.-W.L.); (M.-C.W.)
| | - Shao-Wei Lu
- Institute of Cellular and Organismic Biology, Academia Sinica, Taipei 11529, Taiwan; (S.-W.S.); (J.-J.Y.); (Y.-L.T.); (S.-W.L.); (M.-C.W.)
| | - Min-Chen Wang
- Institute of Cellular and Organismic Biology, Academia Sinica, Taipei 11529, Taiwan; (S.-W.S.); (J.-J.Y.); (Y.-L.T.); (S.-W.L.); (M.-C.W.)
| | - Ming-Yi Chou
- Department of Life Science, National Taiwan University, Taipei 10617, Taiwan;
| | - Pung-Pung Hwang
- Institute of Cellular and Organismic Biology, Academia Sinica, Taipei 11529, Taiwan; (S.-W.S.); (J.-J.Y.); (Y.-L.T.); (S.-W.L.); (M.-C.W.)
- Department of Life Science, National Taiwan University, Taipei 10617, Taiwan;
- Correspondence:
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Sampath V, Horesh N, Sasi B, Zannadeh H, Pogodin I, Singh SV, Deutsch J, Lichtstein D. Synthesis and Biological Evaluation of Novel Bufalin Derivatives. Int J Mol Sci 2022; 23:ijms23074007. [PMID: 35409366 PMCID: PMC8999407 DOI: 10.3390/ijms23074007] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2022] [Revised: 03/31/2022] [Accepted: 04/01/2022] [Indexed: 12/14/2022] Open
Abstract
Bufalin and other cardiac steroids (CS) have been used for centuries for the treatment of congestive heart failure, arrhythmias, and other maladies. However, toxicity and the small therapeutic window of this family of steroids limit their use. Therefore, attempts to synthesize a potent, but less toxic, CS are of major importance. In the present study, two novel bufalin derivatives were synthesized and some of their pharmacological properties were characterized. The reaction of bufalin with Ishikawa's reagent resulted in the production of two novel bufalin derivatives: bufalin 2,3-ene and bufalin 3,4-ene. The compounds were purified with TLC and HPLC and their structure was verified with UV, NMR, and MS analyses. The biological activities of these compounds were evaluated by testing their ability to inhibit the Na+, K+-ATPase activity of the brain microsomal fraction to induce cytotoxic activity against the NCI-60 human tumor cell line panel and non-cancer human cells, and to increase the force of contraction of quail embryonic heart muscle cells in culture. The two steroids exhibited biological activities similar to those of other CS in the tested experimental systems, but with reduced cytotoxicity, advocating their development as drugs for the treatment of heart failure and arrhythmias.
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Affiliation(s)
- VishnuPriya Sampath
- Department of Medical Neurobiology, Institute for Medical Research Israel-Canada, Faculty of Medicine, The Hebrew University-Hadassah Medical School, Jerusalem 91120, Israel; (V.S.); (N.H.); (B.S.); (H.Z.); (I.P.)
| | - Noa Horesh
- Department of Medical Neurobiology, Institute for Medical Research Israel-Canada, Faculty of Medicine, The Hebrew University-Hadassah Medical School, Jerusalem 91120, Israel; (V.S.); (N.H.); (B.S.); (H.Z.); (I.P.)
| | - Ben Sasi
- Department of Medical Neurobiology, Institute for Medical Research Israel-Canada, Faculty of Medicine, The Hebrew University-Hadassah Medical School, Jerusalem 91120, Israel; (V.S.); (N.H.); (B.S.); (H.Z.); (I.P.)
| | - Hiba Zannadeh
- Department of Medical Neurobiology, Institute for Medical Research Israel-Canada, Faculty of Medicine, The Hebrew University-Hadassah Medical School, Jerusalem 91120, Israel; (V.S.); (N.H.); (B.S.); (H.Z.); (I.P.)
| | - Ilana Pogodin
- Department of Medical Neurobiology, Institute for Medical Research Israel-Canada, Faculty of Medicine, The Hebrew University-Hadassah Medical School, Jerusalem 91120, Israel; (V.S.); (N.H.); (B.S.); (H.Z.); (I.P.)
| | - Shiv Vardan Singh
- Department of Biochemistry, Faculty of Science, University of Allahabad, Prayagraj 211002, India;
| | - Joseph Deutsch
- Department of Medicinal Chemistry, Institute of Drug Research, School of Pharmacy, Faculty of Medicine, The Hebrew University-Hadassah Medical School, Jerusalem 91120, Israel
- Correspondence: (J.D.); (D.L.)
| | - David Lichtstein
- Department of Medical Neurobiology, Institute for Medical Research Israel-Canada, Faculty of Medicine, The Hebrew University-Hadassah Medical School, Jerusalem 91120, Israel; (V.S.); (N.H.); (B.S.); (H.Z.); (I.P.)
- Correspondence: (J.D.); (D.L.)
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131
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Khitan ZJ, Chin KV, Sodhi K, Kheetan M, Alsanani A, Shapiro JI. Gut microbiome and diet in populations with obesity: Role of the Na+/K+-ATPase transporter signaling in severe COVID-19. Obesity (Silver Spring) 2022; 30:869-873. [PMID: 35048549 PMCID: PMC8957587 DOI: 10.1002/oby.23387] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/23/2021] [Revised: 01/04/2022] [Accepted: 01/15/2022] [Indexed: 11/11/2022]
Abstract
OBJECTIVE The triad of obesity, a high-protein diet from animal sources, and disturbed gut microbiota have been linked to poor clinical outcomes in patients with COVID-19. In this report, the effect of oxidative stress resulting from the Na+ /K+ -ATPase transporter signaling cascade is explored as a driver of this poor clinical outcome. METHODS Protein-protein interactions with the SARS-CoV-2 proteome were identified from the interactome data for Na+ /K+ -transporting ATPase subunit α-1 (ATP1A1), epidermal growth factor receptor, and ERB-B2 receptor tyrosine kinase 2, using the curated data from the BioGRID Database of Protein Interactions. Data for the gene expression pattern of inflammatory response were from the Gene Expression Omnibus database for cardiomyocytes post SARS-CoV-2 infection (number GSE151879). RESULTS The ATP1A1 subunit of the Na+ /K+ -ATPase transporter is targeted by multiple SARS-CoV-2 proteins. Furthermore, receptor proteins associated with inflammatory response, including epidermal growth factor receptor and ERB-B2 receptor tyrosine kinase 2 (which interact with ATP1A1), are also targeted by some SARS-CoV-2 proteins. This heightened interaction likely triggers a cytokine release that increases the severity of the viral infection in individuals with obesity. CONCLUSIONS The similarities between the effects of SARS-CoV-2 proteins and indoxyl sulphate on the Na+ /K+ -ATPase transporter signaling cascade suggest the possibility of an augmentation of gene changes seen with COVID-19 infection that can result in a hyperinduction of cytokine release in individuals with obesity.
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Affiliation(s)
- Zeid J. Khitan
- Department of Internal Medicine, Joan C. Edwards School of Medicine, Marshall University, West Virginia, United States
| | - Khew-Voon Chin
- Department of Biomedical Sciences, Joan C. Edwards School of Medicine, Marshall University, West Virginia, United States
| | - Komal Sodhi
- Department of Biomedical Sciences, Joan C. Edwards School of Medicine, Marshall University, West Virginia, United States
| | - Murad Kheetan
- Department of Internal Medicine, Joan C. Edwards School of Medicine, Marshall University, West Virginia, United States
| | - Ahlim Alsanani
- Department of Internal Medicine, Joan C. Edwards School of Medicine, Marshall University, West Virginia, United States
| | - Joseph I. Shapiro
- Department of Internal Medicine, Joan C. Edwards School of Medicine, Marshall University, West Virginia, United States
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132
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Costa TGF, Oliveira MM, Toledo MM, Santos HB, Thome RG, Cortes VF, Santos HL, Quintas LEM, Sousa L, Fontes CFL, Barbosa LA. Effect of Fe 3+ on Na,K-ATPase: Unexpected activation of ATP hydrolysis. Biochim Biophys Acta Biomembr 2022; 1864:183868. [PMID: 35063401 DOI: 10.1016/j.bbamem.2022.183868] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/03/2021] [Revised: 01/10/2022] [Accepted: 01/12/2022] [Indexed: 01/01/2023]
Abstract
Iron is a key element in cell function; however, its excess in iron overload conditions can be harmful through the generation of reactive oxygen species (ROS) and cell oxidative stress. Activity of Na,K-ATPase has been shown to be implicated in cellular iron uptake and iron modulates the Na,K-ATPase function from different tissues. In this study, we determined the effect of iron overload on Na,K-ATPase activity and established the role that isoforms and conformational states of this enzyme has on this effect. Total blood and membrane preparations from erythrocytes (ghost cells), as well as pig kidney and rat brain cortex, and enterocytes cells (Caco-2) were used. In E1-related subconformations, an enzyme activation effect by iron was observed, and in the E2-related subconformations enzyme inhibition was observed. The enzyme's kinetic parameters were significantly changed only in the Na+ curve in ghost cells. In contrast to Na,K-ATPase α2 and α3 isoforms, activation was not observed for the α1 isoform. In Caco-2 cells, which only contain Na,K-ATPase α1 isoform, the FeCl3 increased the intracellular storage of iron, catalase activity, the production of H2O2 and the expression levels of the α1 isoform. In contrast, iron did not affect lipid peroxidation, GSH content, superoxide dismutase and Na,K-ATPase activities. These results suggest that iron itself modulates Na,K-ATPase and that one or more E1-related subconformations seems to be determinant for the sensitivity of iron modulation through a mechanism in which the involvement of the Na, K-ATPase α3 isoform needs to be further investigated.
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Affiliation(s)
- Tamara G F Costa
- Laboratório de Bioquímica Celular, Universidade Federal de São João del-Rei, Campus Centro-Oeste Dona Lindu, Divinopolis, MG, Brazil
| | - Marina M Oliveira
- Laboratório de Bioquímica Celular, Universidade Federal de São João del-Rei, Campus Centro-Oeste Dona Lindu, Divinopolis, MG, Brazil
| | - Marina M Toledo
- Laboratório de Bioquímica Celular, Universidade Federal de São João del-Rei, Campus Centro-Oeste Dona Lindu, Divinopolis, MG, Brazil
| | - Helio B Santos
- Laboratório de Processamento de Tecidos, Universidade Federal de São João del-Rei (UFSJ), Campus Centro-Oeste Dona Lindu, Divinópolis, Minas Gerais, Brazil
| | - Ralph G Thome
- Laboratório de Processamento de Tecidos, Universidade Federal de São João del-Rei (UFSJ), Campus Centro-Oeste Dona Lindu, Divinópolis, Minas Gerais, Brazil
| | - Vanessa F Cortes
- Laboratório de Bioquímica Celular, Universidade Federal de São João del-Rei, Campus Centro-Oeste Dona Lindu, Divinopolis, MG, Brazil
| | - Herica L Santos
- Laboratório de Bioquímica Celular, Universidade Federal de São João del-Rei, Campus Centro-Oeste Dona Lindu, Divinopolis, MG, Brazil
| | - Luis Eduardo M Quintas
- Laboratório de Farmacologia Bioquímica e Molecular, Instituto de Ciências Biomédicas, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, Brazil
| | - Leilismara Sousa
- Laboratório de Bioquímica Celular, Universidade Federal de São João del-Rei, Campus Centro-Oeste Dona Lindu, Divinopolis, MG, Brazil
| | - Carlos Frederico L Fontes
- Laboratório de Estrutura e Regulação de Proteínas e ATPases, Programa de Biologia Estrutural, Instituto de Bioquímica Médica Leopoldo de Meis, Centro de Ciências da Saúde, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, Brazil.
| | - Leandro A Barbosa
- Laboratório de Bioquímica Celular, Universidade Federal de São João del-Rei, Campus Centro-Oeste Dona Lindu, Divinopolis, MG, Brazil.
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Shaughnessy CA, Balfry SK, Bystriansky JS. The isosmotic point as critical salinity limit for growth and osmoregulation, but not survival, in the wolf eel Anarrhichthys ocellatus. Fish Physiol Biochem 2022; 48:471-480. [PMID: 35338416 DOI: 10.1007/s10695-022-01064-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/20/2021] [Accepted: 03/10/2022] [Indexed: 06/14/2023]
Abstract
Members of wolf fish family Anarhichadidae have emerged as potential cold-water marine aquaculture species. This study examined growth performance and osmoregulation in juvenile wolf eel (Anarrhichthys ocellatus) held in a series of dilute salinities (30, 14, 9, and 6 ‰) over an 8-week trial. At the conclusion of the growth study, fish were sampled for analysis of gill and intestine enzyme activity, plasma ion content, and muscle moisture. Growth rate remained positive in all salinities throughout the 8-week trial. Specific growth rate was maintained above 3.0% mass day-1 at salinities of 30 and 14 ‰, but was significantly reduced at 9 (2.9% mass day-1) and 6 ‰ (2.0% mass day-1). Muscle water content increased with increasing salinity dilution (77.9% water in 30 ‰; 79.8% water in 6 ‰), and plasma osmolality (~ 320 mOsm kg-1) was maintained in salinities as dilute as 9 ‰ but was significantly lower (~ 280 mOsm kg-1) in the most dilute salinity of 6 ‰. Segmental linear regression analyses revealed that the calculated isosmotic point for wolf eel of ~ 10.6 ‰ was a critical limit for maintaining growth performance and osmoregulatory homeostasis. It is an important finding that fish considered to be a typical marine stenohaline organism could maintain ion and water balance as low as the isosmotic point, and exhibit survival and positive growth rates in salinities as dilute as 6 ‰. This work delivers a fundamental step in the empirical examination of this emerging aquaculture species and provides a model for evaluating osmoregulatory performance of marine stenohaline fishes in low-salinity aquaculture.
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Affiliation(s)
- Ciaran A Shaughnessy
- Department of Biological Sciences, DePaul University, Chicago, IL, USA.
- Department of Biological Sciences, University of Denver, S. G. Mudd Building, 2101 E Wesley Ave, Denver, CO, 80208, USA.
| | - Shannon K Balfry
- Formerly of Vancouver Aquarium Marine Science Centre, Vancouver, BC, Canada
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Huang M, Wang X, Banerjee M, Mukherji ST, Kutz LC, Zhao A, Sepanski M, Fan CM, Zhu GZ, Tian J, Wang DZ, Zhu H, Xie ZJ, Pierre SV, Cai L. Regulation of Myogenesis by a Na/K-ATPase α1 Caveolin-Binding Motif. Stem Cells 2022; 40:133-148. [PMID: 35257186 PMCID: PMC8943859 DOI: 10.1093/stmcls/sxab012] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2021] [Accepted: 09/25/2021] [Indexed: 01/12/2024]
Abstract
The N-terminal caveolin-binding motif (CBM) in Na/K-ATPase (NKA) α1 subunit is essential for cell signaling and somitogenesis in animals. To further investigate the molecular mechanism, we have generated CBM mutant human-induced pluripotent stem cells (iPSCs) through CRISPR/Cas9 genome editing and examined their ability to differentiate into skeletal muscle (Skm) cells. Compared with the parental wild-type human iPSCs, the CBM mutant cells lost their ability of Skm differentiation, which was evidenced by the absence of spontaneous cell contraction, marker gene expression, and subcellular myofiber banding structures in the final differentiated induced Skm cells. Another NKA functional mutant, A420P, which lacks NKA/Src signaling function, did not produce a similar defect. Indeed, A420P mutant iPSCs retained intact pluripotency and ability of Skm differentiation. Mechanistically, the myogenic transcription factor MYOD was greatly suppressed by the CBM mutation. Overexpression of a mouse Myod cDNA through lentiviral delivery restored the CBM mutant cells' ability to differentiate into Skm. Upstream of MYOD, Wnt signaling was demonstrated from the TOPFlash assay to have a similar inhibition. This effect on Wnt activity was further confirmed functionally by defective induction of the presomitic mesoderm marker genes BRACHYURY (T) and MESOGENIN1 (MSGN1) by Wnt3a ligand or the GSK3 inhibitor/Wnt pathway activator CHIR. Further investigation through immunofluorescence imaging and cell fractionation revealed a shifted membrane localization of β-catenin in CBM mutant iPSCs, revealing a novel molecular component of NKA-Wnt regulation. This study sheds light on a genetic regulation of myogenesis through the CBM of NKA and control of Wnt/β-catenin signaling.
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Affiliation(s)
- Minqi Huang
- Marshall Institute for Interdisciplinary Research (MIIR) at Marshall University, Huntington, WV 25703, USA
| | - Xiaoliang Wang
- Marshall Institute for Interdisciplinary Research (MIIR) at Marshall University, Huntington, WV 25703, USA
- Joan C. Edwards School of Medicine at Marshall University, Huntington, WV 25703, USA
| | - Moumita Banerjee
- Marshall Institute for Interdisciplinary Research (MIIR) at Marshall University, Huntington, WV 25703, USA
| | - Shreya T Mukherji
- Marshall Institute for Interdisciplinary Research (MIIR) at Marshall University, Huntington, WV 25703, USA
| | - Laura C Kutz
- Marshall Institute for Interdisciplinary Research (MIIR) at Marshall University, Huntington, WV 25703, USA
| | - Aijie Zhao
- Marshall Institute for Interdisciplinary Research (MIIR) at Marshall University, Huntington, WV 25703, USA
| | - Michael Sepanski
- Department of Embryology, Carnegie Institution for Science, 3520 San Martin Drive, Baltimore, MD 21218, USA
| | - Chen-Ming Fan
- Department of Embryology, Carnegie Institution for Science, 3520 San Martin Drive, Baltimore, MD 21218, USA
| | - Guo-Zhang Zhu
- Department of Biological Sciences, Marshall University, Huntington, WV 25703, USA
| | - Jiang Tian
- Marshall Institute for Interdisciplinary Research (MIIR) at Marshall University, Huntington, WV 25703, USA
- Joan C. Edwards School of Medicine at Marshall University, Huntington, WV 25703, USA
| | - Da-Zhi Wang
- University of South Florida Health Heart Institute, Morsani College of Medicine, University of South Florida, 560 Channelside Drive, Tampa, FL 33602, USA
| | - Hua Zhu
- Department of Surgery, The Ohio State University, 396 Biomedical Research Tower, 460 W. 12th Avenue, Columbus, OH 43210, USA
| | - Zi-Jian Xie
- Marshall Institute for Interdisciplinary Research (MIIR) at Marshall University, Huntington, WV 25703, USA
| | - Sandrine V Pierre
- Marshall Institute for Interdisciplinary Research (MIIR) at Marshall University, Huntington, WV 25703, USA
| | - Liquan Cai
- Marshall Institute for Interdisciplinary Research (MIIR) at Marshall University, Huntington, WV 25703, USA
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Oluranti OI, Adeyemo VA, Achile EO, Fatokun BP, Ojo AO. Rutin Improves Cardiac and Erythrocyte Membrane-Bound ATPase Activities in Male Rats Exposed to Cadmium Chloride and Lead Acetate. Biol Trace Elem Res 2022; 200:1181-1189. [PMID: 33844168 DOI: 10.1007/s12011-021-02711-4] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/18/2021] [Accepted: 04/06/2021] [Indexed: 01/09/2023]
Abstract
Cardiovascular diseases have been associated with cadmium (Cd) and lead (Pb). Impaired Ca2+ and Na+/K+-ATPase activities have also been linked to hemolytic and cardiovascular disorders. This study investigated the effect of rutin on Cd and/or Pb-induced cardiac and erythrocyte disorders in male rats. Twenty-five (25) male Wistar rats were treated as (n=5): Control, Pb (60 mg/kg, p.o), Cd (5 mg/kg, p.o), Pb + Cd, Rutin + Pb + Cd (50 mg/kg Rt, 60 mg/kg Pb, 5 mg/kg Cd, p.o). Plasma electrolyte and Ca2+- and Na+/K+-ATPase activities in the erythrocyte and heart of the rats were assayed. There was an increased and decreased activity of cardiac and erythrocyte Na+/K+-ATPase in Pb- (172%) and Cd- (33.7%) treated groups, respectively. However, rutin increased erythrocyte Na+/K+-ATPase activity in Cd + Pb when compared with Cd and Cd + Pb groups. Erythrocyte Ca2+-ATPase activity was decreased in the Pb (68%), Cd (68%) and Cd + Pb (55.3%) groups. Cardiac Na+/K+-ATPase activity was not altered in Pb and Cd groups while it decreased in Cd + Pb. Rutin increased the activity of the pump in Cd +Pb-treated rats compared to the Cd+Pb group. Therefore, rutin reversed cadmium- and lead-induced impaired cardiac and erythrocyte membrane Ca2+- and Na+/K+-ATPase activities. Graphical Abstract Dotted lines-decrease activity, curved lines-increased activity (created with BioRender.com ).
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Affiliation(s)
- Olufemi I Oluranti
- Applied and Environmental Physiology Unit, Department of Physiology, Bowen University, P.M.B 284, Iwo, Osun State, Nigeria.
| | - Victor A Adeyemo
- Applied and Environmental Physiology Unit, Department of Physiology, Bowen University, P.M.B 284, Iwo, Osun State, Nigeria
| | - Esther O Achile
- Applied and Environmental Physiology Unit, Department of Physiology, Bowen University, P.M.B 284, Iwo, Osun State, Nigeria
| | - Bosede P Fatokun
- Applied and Environmental Physiology Unit, Department of Physiology, Bowen University, P.M.B 284, Iwo, Osun State, Nigeria
| | - Alaba O Ojo
- Cardiovascular Physiology Unit, Department of Physiology, Bowen University, P.M.B 284, Iwo, Osun State, Nigeria
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136
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Shandell MA, Capatina AL, Lawrence SM, Brackenbury WJ, Lagos D. Inhibition of the Na +/K +-ATPase by cardiac glycosides suppresses expression of the IDO1 immune checkpoint in cancer cells by reducing STAT1 activation. J Biol Chem 2022; 298:101707. [PMID: 35150740 PMCID: PMC8902613 DOI: 10.1016/j.jbc.2022.101707] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2021] [Revised: 01/27/2022] [Accepted: 01/28/2022] [Indexed: 12/18/2022] Open
Abstract
Despite extensive basic and clinical research on immune checkpoint regulatory pathways, little is known about the effects of the ionic tumor microenvironment on immune checkpoint expression and function. Here we describe a mechanistic link between Na+/K+-ATPase (NKA) inhibition and activity of the immune checkpoint protein indoleamine-pyrrole 2',3'-dioxygenase 1 (IDO1). We found that IDO1 was necessary and sufficient for production of kynurenine, a downstream tryptophan metabolite, in cancer cells. We developed a spectrophotometric assay to screen a library of 31 model ion transport-targeting compounds for potential effects on IDO1 function in A549 lung and MDA-MB-231 breast cancer cells. This revealed that the cardiac glycosides ouabain and digoxin inhibited kynurenine production at concentrations that did not affect cell survival. NKA inhibition by ouabain and digoxin resulted in increased intracellular Na+ levels and downregulation of IDO1 mRNA and protein levels, which was consistent with the reduction in kynurenine levels. Knockdown of ATP1A1, the ɑ1 subunit of the NKA and target of cardiac glycosides, increased Na+ levels to a lesser extent than cardiac glycoside treatment and did not affect IDO1 expression. However, ATP1A1 knockdown significantly enhanced the effect of cardiac glycosides on IDO1 expression and kynurenine production. Mechanistically, we show that cardiac glycoside treatment resulted in curtailing the length of phosphorylation-mediated stabilization of STAT1, a transcriptional regulator of IDO1 expression, an effect enhanced by ATP1A1 knockdown. Our findings reveal cross talk between ionic modulation via cardiac glycosides and immune checkpoint protein expression in cancer cells with broad mechanistic and clinical implications.
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Affiliation(s)
- Mia A Shandell
- Department of Biology, University of York, York, United Kingdom; Hull York Medical School, University of York, York, United Kingdom; York Biomedical Research Institute, University of York, York, United Kingdom
| | - Alina L Capatina
- Department of Biology, University of York, York, United Kingdom; York Biomedical Research Institute, University of York, York, United Kingdom
| | | | - William J Brackenbury
- Department of Biology, University of York, York, United Kingdom; York Biomedical Research Institute, University of York, York, United Kingdom
| | - Dimitris Lagos
- Hull York Medical School, University of York, York, United Kingdom; York Biomedical Research Institute, University of York, York, United Kingdom.
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Wang H, Zou Z, Wan L, Xue J, Chen C, Yu B, Zhang Z, Yang L, Xie L. Periplocin ameliorates mouse age-related meibomian gland dysfunction through up-regulation of Na/K-ATPase via SRC pathway. Biomed Pharmacother 2022; 146:112487. [PMID: 34883449 DOI: 10.1016/j.biopha.2021.112487] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2021] [Revised: 11/23/2021] [Accepted: 11/30/2021] [Indexed: 11/18/2022] Open
Abstract
Age-related meibomian gland dysfunction (MGD) is the main cause of evaporative dry eye disease in an aging population. Decreased meibocyte cell renewal and lipid synthesis are associated with age-related MGD. Here, we found an obvious decline of Ki67, ΔNp63, and Na+/K+ ATPase expression in aged meibomian glands. Potential Na+/K+ ATPase agonist periplocin, a naturally occurring compound extracted from the traditional herbal medicine cortex periplocae, could promote the proliferation and stem cell activity of meibocyte cells in vitro. Moreover, we observed that periplocin treatment effectively increased the expression of Na+ /K+ ATPase, accompanied with the enhanced expression of Ki67 and ΔNp63 in aged meibomian glands, indicating that periplocin may accelerate meibocyte cell renewal in aged mice. LipidTox staining showed increased lipid accumulation after periplocin treatment in cultured meibomian gland cells and aged meibomian glands. Furthermore, we demonstrated that the SRC pathway was inhibited in aged meibomian glands; however, it was activated by periplocin. Accordingly, the inhibition of the SRC signaling pathway by saracatinib blocked periplocin-induced proliferation and lipid accumulation in meibomian gland cells. In sum, we suggest periplocin-ameliorated meibocyte cell renewal and lipid synthesis in aged meibomian glands via the SRC pathway, which could be a promising candidate for age-related MGD.
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Affiliation(s)
- Huifeng Wang
- Qingdao Eye Hospital of Shandong First Medical University, Qingdao, China; State Key Laboratory Cultivation Base, Shandong Provincial Key Laboratory of Ophthalmology, Eye Institute of Shandong First Medical University Qingdao, China
| | - Zongzheng Zou
- State Key Laboratory Cultivation Base, Shandong Provincial Key Laboratory of Ophthalmology, Eye Institute of Shandong First Medical University Qingdao, China
| | - Luqin Wan
- Qingdao Eye Hospital of Shandong First Medical University, Qingdao, China; State Key Laboratory Cultivation Base, Shandong Provincial Key Laboratory of Ophthalmology, Eye Institute of Shandong First Medical University Qingdao, China
| | - Junfa Xue
- State Key Laboratory Cultivation Base, Shandong Provincial Key Laboratory of Ophthalmology, Eye Institute of Shandong First Medical University Qingdao, China
| | - Chen Chen
- State Key Laboratory Cultivation Base, Shandong Provincial Key Laboratory of Ophthalmology, Eye Institute of Shandong First Medical University Qingdao, China
| | - Bingjie Yu
- State Key Laboratory Cultivation Base, Shandong Provincial Key Laboratory of Ophthalmology, Eye Institute of Shandong First Medical University Qingdao, China
| | - Zhenzhen Zhang
- State Key Laboratory Cultivation Base, Shandong Provincial Key Laboratory of Ophthalmology, Eye Institute of Shandong First Medical University Qingdao, China
| | - Lingling Yang
- State Key Laboratory Cultivation Base, Shandong Provincial Key Laboratory of Ophthalmology, Eye Institute of Shandong First Medical University Qingdao, China.
| | - Lixin Xie
- Qingdao Eye Hospital of Shandong First Medical University, Qingdao, China; State Key Laboratory Cultivation Base, Shandong Provincial Key Laboratory of Ophthalmology, Eye Institute of Shandong First Medical University Qingdao, China.
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Favia M, Gerbino A, Notario E, Tragni V, Sgobba MN, Dell’Aquila ME, Pierri CL, Guerra L, Ciani E. The Non-Gastric H+/K+ ATPase (ATP12A) Is Expressed in Mammalian Spermatozoa. Int J Mol Sci 2022; 23:ijms23031048. [PMID: 35162971 PMCID: PMC8835340 DOI: 10.3390/ijms23031048] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2021] [Revised: 01/15/2022] [Accepted: 01/17/2022] [Indexed: 12/10/2022] Open
Abstract
H+/K+ ATPase Type 2 is an heteromeric membrane protein involved in cation transmembrane transport and consists of two subunits: a specific α subunit (ATP12A) and a non-specific β subunit. The aim of this study was to demonstrate the presence and establish the localization of ATP12A in spermatozoa from Bubalus bubalis, Bos taurus and Ovis aries. Immunoblotting revealed, in all three species, a major band (100 kDa) corresponding to the expected molecular mass. The ATP12A immunolocalization pattern showed, consistently in the three species, a strong signal at the acrosome. These results, described here for the first time in spermatozoa, are consistent with those observed for the β1 subunit of Na+/K+ ATPase, suggesting that the latter may assemble with the α subunit to produce a functional ATP12A dimer in sperm cells. The above scenario appeared to be nicely supported by 3D comparative modeling and interaction energy calculations. The expression of ATP12A during different stages of bovine sperm maturation progressively increased, moving from epididymis to deferent ducts. Based on overall results, we hypothesize that ATP12A may play a role in acrosome reactions. Further studies will be required in order to address the functional role of this target protein in sperm physiology.
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139
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Cao Q, Blondeau-Bidet E, Lorin-Nebel C. Intestinal osmoregulatory mechanisms differ in Mediterranean and Atlantic European sea bass: A focus on hypersalinity. Sci Total Environ 2022; 804:150208. [PMID: 34798741 DOI: 10.1016/j.scitotenv.2021.150208] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/30/2021] [Revised: 09/01/2021] [Accepted: 09/03/2021] [Indexed: 06/13/2023]
Abstract
European sea bass (Dicentrarchus labrax) migrate towards habitats where salinity can reach levels over 60‰, notably in Mediterranean lagoons. D. labrax are genetically subdivided in Atlantic and Mediterranean lineages and have evolved in slightly different salinities. We compared Atlantic and West-Mediterranean populations regarding their capacity to tolerate hypersalinity with a focus on the involvement of the intestine in solute-driven water reabsorption. Fish were analyzed following a two-week transfer from seawater (SW, 36‰) to either SW or hypersaline water (HW, 55‰). Differences among lineages were observed in posterior intestines of fish maintained in SW regarding NKA activities and mRNA expressions of nkaα1a, aqp8b, aqp1a and aqp1b with systematic higher levels in Mediterranean sea bass. High salinity transfer triggered similar responses in both lineages but at different magnitudes which may indicate slight different physiological strategies between lineages. High salinity transfer did not significantly affect the phenotypic traits measured in the anterior intestine. In the posterior intestine however, the size of enterocytes and NKA activity were higher in HW compared to SW. In this tissue, nka-α1a, nkcc2, aqp8ab and aqp8aa mRNA levels were higher in HW compared to SW as well as relative protein expression of AQP8ab. For aqp1a, 1b, 8aa and 8b, an opposite trend was observed. The sub-apical localization of AQP8ab in enterocytes suggests its role in transepithelial water reabsorption. Strong apical NKCC2/NCC staining indicates an increased Na+ and Cl- reuptake by enterocytes which could contribute to solute-coupled water reuptake in cells where AQP8ab is expressed.
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Affiliation(s)
- Quanquan Cao
- Univ Montpellier, MARBEC (CNRS, IFREMER, IRD, UM), 34095 Montpellier, France
| | - Eva Blondeau-Bidet
- Univ Montpellier, MARBEC (CNRS, IFREMER, IRD, UM), 34095 Montpellier, France
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Abstract
Primary aldosteronism (PA) is the most common form of secondary arterial hypertension, with a prevalence of approximately 20% in patients with resistant hypertension. In the last decade, somatic pathogenic variants in KCNJ5, CACNA1D, ATP1A1 and ATP2B3 genes, which are involved in maintaining intracellular ionic homeostasis and cell membrane potential, were described in aldosterone-producing adenomas (aldosteronomas). All variants in these genes lead to the activation of calcium signaling, the major trigger for aldosterone production. Genetic causes of familial hyperaldosteronism have been expanded through the report of germline pathogenic variants in KCNJ5, CACNA1H and CLCN2 genes. Moreover, PDE2A and PDE3B variants were associated with bilateral PA and increased the spectrum of genetic etiologies of PA. Of great importance, the genetic investigation of adrenal lesions guided by the CYP11B2 staining strongly changed the landscape of somatic genetic findings of PA. Furthermore, CYP11B2 staining allowed the better characterization of the aldosterone-producing adrenal lesions in unilateral PA. Aldosterone production may occur from multiple sources, such as solitary aldosteronoma or aldosterone-producing nodule (classical histopathology) or clusters of autonomous aldosterone-producing cells without apparent neoplasia denominated aldosterone-producing micronodules (non-classical histopathology). Interestingly, KCNJ5 mutational status and classical histopathology of unilateral PA (aldosteronoma) have emerged as relevant predictors of clinical and biochemical outcome, respectively. In this review, we summarize the most recent advances in the pathogenesis of PA and discuss their impact on clinical outcome.
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Affiliation(s)
- Lucas S. Santana
- Unidade de Adrenal, Laboratório de Hormônios e Genética Molecular Laboratório de Investigação Médica 42 (LIM/42), Serviço de Endocrinologia e Metabologia, Hospital das Clínicas, Faculdade de Medicina da Universidade de São Paulo, São Paulo, Brazil
| | - Augusto G. Guimaraes
- Unidade de Adrenal, Laboratório de Hormônios e Genética Molecular Laboratório de Investigação Médica 42 (LIM/42), Serviço de Endocrinologia e Metabologia, Hospital das Clínicas, Faculdade de Medicina da Universidade de São Paulo, São Paulo, Brazil
| | - Madson Q. Almeida
- Unidade de Adrenal, Laboratório de Hormônios e Genética Molecular Laboratório de Investigação Médica 42 (LIM/42), Serviço de Endocrinologia e Metabologia, Hospital das Clínicas, Faculdade de Medicina da Universidade de São Paulo, São Paulo, Brazil
- Divisão de Oncologia Endócrina, Instituto do Câncer do Estado de São Paulo (ICESP), Faculdade de Medicina da Universidade de São Paulo, São Paulo, Brazil
- *Correspondence: Madson Q. Almeida,
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141
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Borges VD, Zebral YD, Costa PG, da Silva Fonseca J, Klein RD, Bianchini A. Metal Accumulation and Ion Regulation in the Fish Hyphessobrycon luetkenii Living in a Site Chronically Contaminated by Copper: Insights from Translocation Experiments. Arch Environ Contam Toxicol 2022; 82:62-71. [PMID: 34664084 DOI: 10.1007/s00244-021-00895-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/27/2021] [Accepted: 09/28/2021] [Indexed: 06/13/2023]
Abstract
Fish living in the João Dias creek (southern Brazil) have to deal with trace-metal contamination in the long-term basis, as this aquatic environment has been historically impacted by copper mining activities. In order to survive in this harsh environment, the local biota had to develop adaptations related to pollution tolerance. The aim of this study was to test if biochemical mechanisms related to osmoregulation were among these adaptations, using translocation experiments. Water ionic and trace-metal compositions were measured in a nonmetal impacted site (NMIS) and in a metal impacted site (MIS) of this creek. Also, whole-body metal accumulation, ion concentration and branchial enzyme activity (Na,K-ATPase and carbonic anhydrase) were evaluated in Hyphessobrycon luetkenii. In both NMIS and MIS, fish were collected and immediately stored, kept caged or translocated from sites. The result shows that waterborne Cu was 3.4-fold higher at the MIS. Accordingly, animals that had contact with this site showed elevated whole-body Cu levels. Moreover, both translocated groups showed elevated Na,K-ATPase activity. Additionally, fish translocated from the NMIS to the MIS showed lower carbonic anhydrase activity. These findings indicate that H. luetkenii chronically or acutely exposed to naturally elevated waterborne Cu showed a rapid Cu bioaccumulation but was unable to readily excrete it. Moreover, classic Cu osmoregulatory toxicity related to Na,K-ATPase inhibition was not observed. Conversely, impacts in ammonia excretion related to carbonic anhydrase inhibition may have occurred.
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Affiliation(s)
- Vinícius Dias Borges
- Programa de Pós-Graduação em Ciências Fisiológicas, Instituto de Ciências Biológicas, Universidade Federal do Rio Grande - FURG, Avenida Itália km 8, Campus Carreiros, 96.203-900, Rio Grande, RS, Brazil
| | - Yuri Dornelles Zebral
- Programa de Pós-Graduação em Ciências Fisiológicas, Instituto de Ciências Biológicas, Universidade Federal do Rio Grande - FURG, Avenida Itália km 8, Campus Carreiros, 96.203-900, Rio Grande, RS, Brazil
| | - Patrícia Gomes Costa
- Instituto de Ciências Biológicas, Universidade Federal do Rio Grande - FURG, Avenida Itália km 8, Campus Carreiros, 96.203-900, Rio Grande, RS, Brazil
| | - Juliana da Silva Fonseca
- Programa de Pós-Graduação em Ciências Fisiológicas, Instituto de Ciências Biológicas, Universidade Federal do Rio Grande - FURG, Avenida Itália km 8, Campus Carreiros, 96.203-900, Rio Grande, RS, Brazil
| | - Roberta Daniele Klein
- Instituto de Ciências Biológicas, Universidade Federal do Rio Grande - FURG, Avenida Itália km 8, Campus Carreiros, 96.203-900, Rio Grande, RS, Brazil
| | - Adalto Bianchini
- Programa de Pós-Graduação em Ciências Fisiológicas, Instituto de Ciências Biológicas, Universidade Federal do Rio Grande - FURG, Avenida Itália km 8, Campus Carreiros, 96.203-900, Rio Grande, RS, Brazil.
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Tverskoi AM, Poluektov YM, Klimanova EA, Mitkevich VA, Makarov AA, Orlov SN, Petrushanko IY, Lopina OD. Depth of the Steroid Core Location Determines the Mode of Na,K-ATPase Inhibition by Cardiotonic Steroids. Int J Mol Sci 2021; 22:ijms222413268. [PMID: 34948068 PMCID: PMC8708600 DOI: 10.3390/ijms222413268] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2021] [Revised: 11/27/2021] [Accepted: 11/30/2021] [Indexed: 12/15/2022] Open
Abstract
Cardiotonic steroids (CTSs) are specific inhibitors of Na,K-ATPase (NKA). They induce diverse physiological effects and were investigated as potential drugs in heart diseases, hypertension, neuroinflammation, antiviral and cancer therapy. Here, we compared the inhibition mode and binding of CTSs, such as ouabain, digoxin and marinobufagenin to NKA from pig and rat kidneys, containing CTSs-sensitive (α1S) and -resistant (α1R) α1-subunit, respectively. Marinobufagenin in contrast to ouabain and digoxin interacted with α1S-NKA reversibly, and its binding constant was reduced due to the decrease in the deepening in the CTSs-binding site and a lower number of contacts between the site and the inhibitor. The formation of a hydrogen bond between Arg111 and Asp122 in α1R-NKA induced the reduction in CTSs’ steroid core deepening that led to the reversible inhibition of α1R-NKA by ouabain and digoxin and the absence of marinobufagenin’s effect on α1R-NKA activity. Our results elucidate that the difference in signaling, and cytotoxic effects of CTSs may be due to the distinction in the deepening of CTSs into the binding side that, in turn, is a result of a bent-in inhibitor steroid core (marinobufagenin in α1S-NKA) or the change of the width of CTSs-binding cavity (all CTSs in α1R-NKA).
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Affiliation(s)
- Artem M. Tverskoi
- Engelhardt Institute of Molecular Biology, Russian Academy of Sciences, 32 Vavilova Street, 119991 Moscow, Russia; (Y.M.P.); (V.A.M.); (A.A.M.); (I.Y.P.)
- Correspondence: (A.M.T.); (O.D.L.)
| | - Yuri M. Poluektov
- Engelhardt Institute of Molecular Biology, Russian Academy of Sciences, 32 Vavilova Street, 119991 Moscow, Russia; (Y.M.P.); (V.A.M.); (A.A.M.); (I.Y.P.)
| | - Elizaveta A. Klimanova
- Faculty of Biology, Lomonosov Moscow State University, 1/12 Leniskie Gory Street, 119234 Moscow, Russia;
| | - Vladimir A. Mitkevich
- Engelhardt Institute of Molecular Biology, Russian Academy of Sciences, 32 Vavilova Street, 119991 Moscow, Russia; (Y.M.P.); (V.A.M.); (A.A.M.); (I.Y.P.)
| | - Alexander A. Makarov
- Engelhardt Institute of Molecular Biology, Russian Academy of Sciences, 32 Vavilova Street, 119991 Moscow, Russia; (Y.M.P.); (V.A.M.); (A.A.M.); (I.Y.P.)
| | - Sergei N. Orlov
- Faculty of Biology, Lomonosov Moscow State University, 1/12 Leniskie Gory Street, 119234 Moscow, Russia;
| | - Irina Yu. Petrushanko
- Engelhardt Institute of Molecular Biology, Russian Academy of Sciences, 32 Vavilova Street, 119991 Moscow, Russia; (Y.M.P.); (V.A.M.); (A.A.M.); (I.Y.P.)
| | - Olga D. Lopina
- Faculty of Biology, Lomonosov Moscow State University, 1/12 Leniskie Gory Street, 119234 Moscow, Russia;
- Correspondence: (A.M.T.); (O.D.L.)
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143
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Angadi P, Das M, Roy R. Effect of high salinity acclimation on glucose homeostasis in Mozambique tilapia (Oreochromis mossambicus). Fish Physiol Biochem 2021; 47:2055-2065. [PMID: 34766241 DOI: 10.1007/s10695-021-01022-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/09/2021] [Accepted: 10/01/2021] [Indexed: 06/13/2023]
Abstract
During salinity stress, osmoregulatory processes in euryhaline fish need to modify for their survival, and glucose is the preferred mode of extra energy during such conditions. These organisms must have a proper mechanism to maintain glucose homeostasis during such modified osmoregulatory process across different body fluids. Hence, we studied high salinity effect on regulation of glucose homeostasis in Mozambique tilapia. The fish were induced to 15‰ salinity for 21 days. Glucose, glycogen, ion concentrations, Na+-K+-ATPase, pyruvate kinase, γ-amylase activities and GLUT mRNA expressions were investigated in liver, intestine, gill and white muscle tissues. At the end of experiment, Na+ ion concentrations, glucose content and activity of Na+-K+-ATPase especially in the gill and intestine were increased, while decrease in liver and gill glycogen content was seen. Lower concentration of glycogen decrease was observed in the intestine and white muscle of the treated group. High pyruvate kinase activity was noticed in liver and gill tissues that correlates with high Na+-K+-ATPase activity. Elevated γ-amylase activity was observed in the liver and intestine suggesting breakdown of glycogen; however, gill and white muscle did not show any increased activity. Increase in GLUT1 and GLUT4 mRNA expressions was observed especially in the gill and intestine, while increase in GLUT2 mRNA expressions was observed in the liver. Upregulations of GLUTs suggest higher influx of glucose into the cell for catabolism to provide energy and further to drive the enhanced osmoregulatory process. These findings suggest glucose homeostasis being regulated in Mozambique tilapia during salinity acclimation.
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Affiliation(s)
- Prateek Angadi
- Department of Zoology, Goa University, Taleigao, Panaji, Goa, 403206, India
| | - Moitreyi Das
- Department of Zoology, Goa University, Taleigao, Panaji, Goa, 403206, India
| | - Ramaballav Roy
- Department of Zoology, Goa University, Taleigao, Panaji, Goa, 403206, India.
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Radosinska J, Vrbjar N. Erythrocyte Deformability and Na,K-ATPase Activity in Various Pathophysiological Situations and Their Protection by Selected Nutritional Antioxidants in Humans. Int J Mol Sci 2021; 22:11924. [PMID: 34769355 PMCID: PMC8584536 DOI: 10.3390/ijms222111924] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2021] [Revised: 10/29/2021] [Accepted: 10/30/2021] [Indexed: 02/02/2023] Open
Abstract
The physicochemical and functional properties of erythrocytes are worsened in a variety of diseases. Erythrocyte deformability refers to their ability to adjust their shape according to external forces exerted against them in the circulation. It is influenced by the functionality of the Na,K-ATPase enzyme, which is localized in their membranes. The proposed review is focused on knowledge regarding changes in erythrocyte Na,K-ATPase activity, and their impact on erythrocyte deformability in various pathophysiological situations observed exclusively in human studies, as well as on the potential erytroprotective effects of selected natural nutritional antioxidants. A clear link between the erythrocyte properties and the parameters of oxidative stress was observed. The undesirable consequences of oxidative stress on erythrocyte quality and hemorheology could be at least partially prevented by intake of diverse antioxidants occurring naturally in foodstuffs. Despite intensive research concerning the effect of antioxidants, only a small number of investigations on erythrocyte properties in humans is available in databases. It is worth shifting attention from animal and in vitro experiments and focusing more on antioxidant administration in human studies in order to establish what type of antioxidant, in what concentration, and in which individuals it may provide a beneficial effect on the human organism, by protecting erythrocyte properties.
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Affiliation(s)
- Jana Radosinska
- Institute of Physiology, Faculty of Medicine, Comenius University in Bratislava, Sasinkova 2, 811 08 Bratislava, Slovakia
- Centre of Experimental Medicine, Slovak Academy of Sciences, Institute for Heart Research, Dúbravská Cesta 9, 841 04 Bratislava, Slovakia;
| | - Norbert Vrbjar
- Centre of Experimental Medicine, Slovak Academy of Sciences, Institute for Heart Research, Dúbravská Cesta 9, 841 04 Bratislava, Slovakia;
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Almquist NW, Wilhelmsen M, Ellefsen S, Sandbakk Ø, Rønnestad BR. Effects of Including Sprints in LIT Sessions during a 14-d Camp on Muscle Biology and Performance Measures in Elite Cyclists. Med Sci Sports Exerc 2021; 53:2333-2345. [PMID: 34081058 DOI: 10.1249/mss.0000000000002709] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
PURPOSE This study investigated the effects of including sprints within low-intensity training (LIT) sessions during a 14-d training camp focusing on LIT, followed by 10-d recovery (Rec), on performance and performance-related measures in elite cyclists. METHODS During the camp, a sprint training group (SPR; n = 9) included 12 × 30-s maximal sprints during five LIT sessions, whereas a control group (CON; n = 9) performed distance-matched LIT only. Training load was equally increased in both groups by 48% ± 27% during the training camp and subsequently decreased by -56% ± 23% during the recovery period compared with habitual training. Performance tests were conducted before the training camp (Pre) and after Rec. Muscle biopsies, hematological measures, and stress/recovery questionnaires were collected Pre and after the camp (Post). RESULTS Thirty-second sprint (SPR vs CON: 4% ± 4%, P < 0.01) and 5-min mean power (SPR vs CON: 4% ± 8%, P = 0.04) changed differently between groups. In muscle, Na+-K+ β1 protein content changed differently between groups, decreasing in CON compared with SPR (-8% ± 14%, P = 0.04), whereas other proteins showed similar changes. SPR and CON displayed similar increases in red blood cell volume (SPR: 2.6% ± 4.7%, P = 0.07; CON: 3.9% ± 4.5%, P = 0.02) and V˙O2 at 4 mmol·L-1 [BLa-] (SPR: 2.5% ± 3.3%, P = 0.03; CON: 2.2% ± 3.0%, P = 0.04). No changes were seen for V˙O2max, Wmax, hematological measures, muscle enzyme activity, and stress/recovery measures. CONCLUSIONS Inclusion of 30-s sprints within LIT sessions during a high-volume training camp affected competition-relevant performance measures and Na+-K+ β1 protein content differently from LIT only, without affecting sport-specific stress/recovery or any other physiological measure in elite cyclists.
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Affiliation(s)
| | - Malene Wilhelmsen
- Section for Health and Exercise Physiology, Inland Norway University of Applied Sciences, Lillehammer, NORWAY
| | - Stian Ellefsen
- Section for Health and Exercise Physiology, Inland Norway University of Applied Sciences, Lillehammer, NORWAY
| | - Øyvind Sandbakk
- Centre for Elite Sports Research, Department of Neuromedicine and Movement Science, Norwegian University of Science and Technology, Trondheim, NORWAY
| | - Bent R Rønnestad
- Section for Health and Exercise Physiology, Inland Norway University of Applied Sciences, Lillehammer, NORWAY
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146
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Chkadua G, Tsakadze L, Shioshvili L, Nozadze E. NA, K-ATPASE AND CL-ATPASE REGULATION BY DOPAMINE. Georgian Med News 2021:153-157. [PMID: 34897063] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
The influence of dopamine (DA) on the Cl-ATPase and Na, K-ATPase in the synaptic membrane fraction of the rat brain has been investigated. The fraction was obtained by differential centrifugation. To analyze the function of Na, K-ATPase, and Cl-ATPase, we have applied the method of kinetic analysis of multi-sited enzyme systems, which has been described as the only method used for kinetic investigation of multi-sited enzyme systems. Dopamine does not alter the stoichiometry of Cl- transport. The number of the Cl- sites intended for the essential activator (n) remains 1. During Na, K-ATPase activation with K+, with the application of DA, it was found that the number of the K+ sites intended for the essential activators (i.e. the stoichiometry of K+ transport) changes, and instead of two becomes one. The impact of DA on the mechanism of Na+-activation of Na, K-ATPase results in the unchanged number of essential activators for Na+ (n=3). The ratio of Na: K stoichiometry changes from 3:2 to 3:1 and so the electrogenicity coefficient is changed.
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Affiliation(s)
- G Chkadua
- Iv. Beritashvili Center of Experimental Biomedicine, Tbilisi, Georgia
| | - L Tsakadze
- Iv. Beritashvili Center of Experimental Biomedicine, Tbilisi, Georgia
| | - L Shioshvili
- Iv. Beritashvili Center of Experimental Biomedicine, Tbilisi, Georgia
| | - E Nozadze
- Iv. Beritashvili Center of Experimental Biomedicine, Tbilisi, Georgia
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147
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Kaivarainen EI, Rendakov NL, Efremov DA, Nemova NN. Na +/K +-ATPase Activity in Smolts of Pink Salmon Oncorhynchus gorbuscha (Walbaum, 1792) from the White Sea Exposed to Fresh, Estuarine, and Sea Water. Dokl Biol Sci 2021; 501:201-205. [PMID: 34962607 DOI: 10.1134/s0012496621060041] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/10/2021] [Revised: 08/30/2021] [Accepted: 08/30/2021] [Indexed: 06/14/2023]
Abstract
The Na+/K+-ATPase (NKA) activity in smolts of pink salmon Oncorhynchus gorbuscha (a salmon species introduced in 1959 into the rivers of the Kola Peninsula) was studied in a ten-day cage experiment with fresh, estuarine, and sea water; the fish were caught during seaward migration in the Indera River of the White Sea basin. The development of tolerance to increased salinity in pink salmon smolts was accompanied by NKA activation. In estuarine water characterized by salinity fluctuations (from fresh to sea water) and in the marine environment (28‰), the NKA activity in pink salmon smolts was significantly higher than in the individuals kept in the cages installed in fresh water. The hypoosmoregulatory ability of pink salmon fry was registered, these data indicated that smoltification in this fish species took place in early ontogenesis. The changes in NKA activity evidenced the readiness of migrating pink salmon fry for the marine phase of their life cycle.
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Affiliation(s)
- E I Kaivarainen
- Institute of Biology, Karelian Research Center, Russian Academy of Sciences, 185000, Petrozavodsk, Russia
| | - N L Rendakov
- Institute of Biology, Karelian Research Center, Russian Academy of Sciences, 185000, Petrozavodsk, Russia.
| | - D A Efremov
- Institute of Biology, Karelian Research Center, Russian Academy of Sciences, 185000, Petrozavodsk, Russia
| | - N N Nemova
- Institute of Biology, Karelian Research Center, Russian Academy of Sciences, 185000, Petrozavodsk, Russia
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148
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Takvam M, Denker E, Gharbi N, Kryvi H, Nilsen TO. Sulfate homeostasis in Atlantic salmon is associated with differential regulation of salmonid-specific paralogs in gill and kidney. Physiol Rep 2021; 9:e15059. [PMID: 34617680 PMCID: PMC8495805 DOI: 10.14814/phy2.15059] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2021] [Accepted: 09/07/2021] [Indexed: 11/27/2022] Open
Abstract
Sulfate ( SO 4 2 - ) regulation is challenging for euryhaline species as they deal with large fluctuations of SO 4 2 - during migratory transitions between freshwater (FW) and seawater (SW), while maintaining a stable plasma SO 4 2 - concentration. Here, we investigated the regulation and potential role of sulfate transporters in Atlantic salmon during the preparative switch from SO 4 2 - uptake to secretion. A preparatory increase in kidney and gill sodium/potassium ATPase (Nka) enzyme activity during smolt development indicate preparative osmoregulatory changes. In contrast to gill Nka activity a transient decrease in kidney Nka after direct SW exposure was observed and may be a result of reduced glomerular filtration rates and tubular flow through the kidney. In silico analyses revealed that Atlantic salmon genome comprises a single slc13a1 gene and additional salmonid-specific duplications of slc26a1 and slc26a6a, leading to new paralogs, namely the slc26a1a and -b, and slc26a6a1 and -a2. A kidney-specific increase in slc26a6a1 and slc26a1a during smoltification and SW transfer, suggests an important role of these sulfate transporters in the regulatory shift from absorption to secretion in the kidney. Plasma SO 4 2 - in FW smolts was 0.70 mM, followed by a transient increase to 1.14 ± 0.33 mM 2 days post-SW transfer, further decreasing to 0.69 ± 0.041 mM after 1 month in SW. Our findings support the vital role of the kidney in SO 4 2 - excretion through the upregulated slc26a6a1, the most likely secretory transport candidate in fish, which together with the slc26a1a transporter likely removes excess SO 4 2 - , and ultimately enable the regulation of normal plasma SO 4 2 - levels in SW.
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Affiliation(s)
- Marius Takvam
- NORCENorwegian Research CenterNORCE EnvironmentBergenNorway
- Department of Biological ScienceUniversity of BergenBergenNorway
| | - Elsa Denker
- Department of Biological ScienceUniversity of BergenBergenNorway
| | - Naouel Gharbi
- NORCENorwegian Research CenterNORCE EnvironmentBergenNorway
| | - Harald Kryvi
- Department of Biological ScienceUniversity of BergenBergenNorway
| | - Tom O. Nilsen
- NORCENorwegian Research CenterNORCE EnvironmentBergenNorway
- Department of Biological ScienceUniversity of BergenBergenNorway
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149
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Major E, Keller I, Horváth D, Tamás I, Erdődi F, Lontay B. Smoothelin-Like Protein 1 Regulates the Thyroid Hormone-Induced Homeostasis and Remodeling of C2C12 Cells via the Modulation of Myosin Phosphatase. Int J Mol Sci 2021; 22:10293. [PMID: 34638630 PMCID: PMC8508602 DOI: 10.3390/ijms221910293] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2021] [Revised: 09/18/2021] [Accepted: 09/21/2021] [Indexed: 11/28/2022] Open
Abstract
The pathological elevation of the active thyroid hormone (T3) level results in the manifestation of hyperthyroidism, which is associated with alterations in the differentiation and contractile function of skeletal muscle (SKM). Myosin phosphatase (MP) is a major cellular regulator that hydrolyzes the phosphoserine of phosphorylated myosin II light chain. MP consists of an MYPT1/2 regulatory and a protein phosphatase 1 catalytic subunit. Smoothelin-like protein 1 (SMTNL1) is known to inhibit MP by directly binding to MP as well as by suppressing the expression of MYPT1 at the transcriptional level. Supraphysiological vs. physiological concentration of T3 were applied on C2C12 myoblasts and differentiated myotubes in combination with the overexpression of SMTNL1 to assess the role and regulation of MP under these conditions. In non-differentiated myoblasts, MP included MYPT1 in the holoenzyme complex and its expression and activity was regulated by SMTNL1, affecting the phosphorylation level of MLC20 assessed using semi-quantitative Western blot analysis. SMTNL1 negatively influenced the migration and cytoskeletal remodeling of myoblasts measured by high content screening. In contrast, in myotubes, the expression of MYPT2 but not MYPT1 increased in a T3-dependent and SMTNL1-independent manner. T3 treatment combined with SMTNL1 overexpression impeded the activity of MP. In addition, MP interacted with Na+/K+-ATPase and dephosphorylated its inhibitory phosphorylation sites, identifying this protein as a novel MP substrate. These findings may help us gain a better understanding of myopathy, muscle weakness and the disorder of muscle regeneration in hyperthyroid patients.
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Affiliation(s)
| | | | | | | | | | - Beáta Lontay
- Department of Medical Chemistry, Faculty of Medicine, University of Debrecen, H-4032 Debrecen, Hungary; (E.M.); (I.K.); (D.H.); (I.T.); (F.E.)
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150
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Abstract
KR2 from marine bacteria Krokinobacter eikastus is a light-driven Na+ pumping rhodopsin family (NaRs) member that actively transports Na+ and/or H+ depending on the ionic state. We here report electrophysiological studies on KR2 to address ion-transport properties under various electrochemical potentials of Δ[Na+], ΔpH, membrane voltage and light quality, because the contributions of these on the pumping activity were less understood so far. After transient expression of KR2 in mammalian cultured cells (ND7/23 cells), photocurrents were measured by whole-cell patch clamp under various intracellular Na+ and pH conditions. When KR2 was continuously illuminated with LED light, two distinct time constants were obtained depending on the Na+ concentration. KR2 exhibited slow ion transport (τoff of 28 ms) below 1.1 mM NaCl and rapid transport (τoff of 11 ms) above 11 mM NaCl. This indicates distinct transporting kinetics of H+ and Na+. Photocurrent amplitude (current density) depends on the intracellular Na+ concentration, as is expected for a Na+ pump. The M-intermediate in the photocycle of KR2 could be transferred into the dark state without net ion transport by blue light illumination on top of green light. The M intermediate was stabilized by higher membrane voltage. Furthermore, we assessed the optogenetic silencing effect of rat cortical neurons after expressing KR2. Light power dependency revealed that action potential was profoundly inhibited by 1.5 mW/mm2 green light illumination, confirming the ability to apply KR2 as an optogenetics silencer.
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Affiliation(s)
- Shoko Hososhima
- Department of Life Science and Applied Chemistry, Nagoya Institute of Technology, Showa-ku, Nagoya, Japan
| | - Hideki Kandori
- Department of Life Science and Applied Chemistry, Nagoya Institute of Technology, Showa-ku, Nagoya, Japan
- OptoBio Technology Research Center, Nagoya Institute of Technology, Showa-ku, Nagoya, Japan
| | - Satoshi P. Tsunoda
- Department of Life Science and Applied Chemistry, Nagoya Institute of Technology, Showa-ku, Nagoya, Japan
- PRESTO, Japan Science and Technology Agency, Kawaguchi, Saitama, Japan
- * E-mail:
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