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Su Q, Yu XJ, Wang XM, Peng B, Bai J, Li HB, Li Y, Xia WJ, Fu LY, Liu KL, Liu JJ, Kang YM. Na+/K+-ATPase Alpha 2 Isoform Elicits Rac1-Dependent Oxidative Stress and TLR4-Induced Inflammation in the Hypothalamic Paraventricular Nucleus in High Salt-Induced Hypertension. Antioxidants (Basel) 2022; 11:antiox11020288. [PMID: 35204171 PMCID: PMC8868219 DOI: 10.3390/antiox11020288] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2021] [Revised: 12/26/2021] [Accepted: 01/04/2022] [Indexed: 02/04/2023] Open
Abstract
Numerous studies have indicated that a high salt diet inhibits brain Na+/K+-ATPase (NKA) activity, and affects oxidative stress and inflammation in the paraventricular nucleus (PVN). Furthermore, Na+/K+-ATPase alpha 2-isoform (NKA α2) may be a target in the brain, taking part in the development of salt-dependent hypertension. Therefore, we hypothesized that NKA α2 regulates oxidative stress and inflammation in the PVN in the context of salt-induced hypertension. Part I: We assessed NKA subunits (NKA α1, NKA α2, and NKA α3), Na+/K+-ATPase activity, oxidative stress, and inflammation in a high salt group (8% NaCl) and normal salt group (0.3% NaCl). Part II: NKA α2 short hairpin RNA (shRNA) was bilaterally microinjected into the PVN of salt-induced hypertensive rats to knockdown NKA α2, and we explored whether NKA α2 regulates downstream signaling pathways related to protein kinase C γ (PKC γ)-dependent oxidative stress and toll-like receptor 4 (TLR4)-induced inflammation in the PVN to promote the development of hypertension. High salt diet increased NKA α1 and NKA α2 protein expression in the PVN but had no effect on NKA α3 compared to the normal salt diet. Na+/K+-ATPase activity and ADP/ATP ratio was lower, but NAD(P)H activity and NF-κB activity in the PVN were higher after a high salt diet. Bilateral PVN microinjection of NKA α2 shRNA not only improved Na+/K+-ATPase activity and ADP/ATP ratio but also suppressed PKC γ-dependent oxidative stress and TLR4-dependent inflammation in the PVN, thus decreasing sympathetic activity in rats with salt-induced hypertension. NKA α2 in the PVN elicits PKC γ/Rac1/NAD (P)H-dependent oxidative stress and TLR4/MyD88/NF-κB-induced inflammation in the PVN, thus increasing MAP and sympathetic activity during the development of salt-induced hypertension.
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Affiliation(s)
- Qing Su
- Key Laboratory of Environment and Genes Related to Diseases of Education Ministry of China, Shaanxi Engineering and Research Center of Vaccine, Department of Physiology and Pathophysiology, School of Basic Medical Sciences, Xi’an Jiaotong University, Xi’an 710061, China; (Q.S.); (X.-M.W.); (H.-B.L.); (Y.L.); (W.-J.X.); (L.-Y.F.); (K.-L.L.); (J.-J.L.)
| | - Xiao-Jing Yu
- Key Laboratory of Environment and Genes Related to Diseases of Education Ministry of China, Shaanxi Engineering and Research Center of Vaccine, Department of Physiology and Pathophysiology, School of Basic Medical Sciences, Xi’an Jiaotong University, Xi’an 710061, China; (Q.S.); (X.-M.W.); (H.-B.L.); (Y.L.); (W.-J.X.); (L.-Y.F.); (K.-L.L.); (J.-J.L.)
- Correspondence: (X.-J.Y.); (Y.-M.K.); Tel./Fax: +86-298-265-7677 (X.-J.Y. & Y.-M.K.)
| | - Xiao-Min Wang
- Key Laboratory of Environment and Genes Related to Diseases of Education Ministry of China, Shaanxi Engineering and Research Center of Vaccine, Department of Physiology and Pathophysiology, School of Basic Medical Sciences, Xi’an Jiaotong University, Xi’an 710061, China; (Q.S.); (X.-M.W.); (H.-B.L.); (Y.L.); (W.-J.X.); (L.-Y.F.); (K.-L.L.); (J.-J.L.)
| | - Bo Peng
- School of Clinical Medicine, Xi’an Jiaotong University, Xi’an 710061, China;
| | - Juan Bai
- Department of Anesthesiology & Center for Brain Science, The First Affiliated Hospital of Xi’an Jiaotong University, Xi’an 710061, China;
| | - Hong-Bao Li
- Key Laboratory of Environment and Genes Related to Diseases of Education Ministry of China, Shaanxi Engineering and Research Center of Vaccine, Department of Physiology and Pathophysiology, School of Basic Medical Sciences, Xi’an Jiaotong University, Xi’an 710061, China; (Q.S.); (X.-M.W.); (H.-B.L.); (Y.L.); (W.-J.X.); (L.-Y.F.); (K.-L.L.); (J.-J.L.)
| | - Ying Li
- Key Laboratory of Environment and Genes Related to Diseases of Education Ministry of China, Shaanxi Engineering and Research Center of Vaccine, Department of Physiology and Pathophysiology, School of Basic Medical Sciences, Xi’an Jiaotong University, Xi’an 710061, China; (Q.S.); (X.-M.W.); (H.-B.L.); (Y.L.); (W.-J.X.); (L.-Y.F.); (K.-L.L.); (J.-J.L.)
| | - Wen-Jie Xia
- Key Laboratory of Environment and Genes Related to Diseases of Education Ministry of China, Shaanxi Engineering and Research Center of Vaccine, Department of Physiology and Pathophysiology, School of Basic Medical Sciences, Xi’an Jiaotong University, Xi’an 710061, China; (Q.S.); (X.-M.W.); (H.-B.L.); (Y.L.); (W.-J.X.); (L.-Y.F.); (K.-L.L.); (J.-J.L.)
| | - Li-Yan Fu
- Key Laboratory of Environment and Genes Related to Diseases of Education Ministry of China, Shaanxi Engineering and Research Center of Vaccine, Department of Physiology and Pathophysiology, School of Basic Medical Sciences, Xi’an Jiaotong University, Xi’an 710061, China; (Q.S.); (X.-M.W.); (H.-B.L.); (Y.L.); (W.-J.X.); (L.-Y.F.); (K.-L.L.); (J.-J.L.)
| | - Kai-Li Liu
- Key Laboratory of Environment and Genes Related to Diseases of Education Ministry of China, Shaanxi Engineering and Research Center of Vaccine, Department of Physiology and Pathophysiology, School of Basic Medical Sciences, Xi’an Jiaotong University, Xi’an 710061, China; (Q.S.); (X.-M.W.); (H.-B.L.); (Y.L.); (W.-J.X.); (L.-Y.F.); (K.-L.L.); (J.-J.L.)
| | - Jin-Jun Liu
- Key Laboratory of Environment and Genes Related to Diseases of Education Ministry of China, Shaanxi Engineering and Research Center of Vaccine, Department of Physiology and Pathophysiology, School of Basic Medical Sciences, Xi’an Jiaotong University, Xi’an 710061, China; (Q.S.); (X.-M.W.); (H.-B.L.); (Y.L.); (W.-J.X.); (L.-Y.F.); (K.-L.L.); (J.-J.L.)
| | - Yu-Ming Kang
- Key Laboratory of Environment and Genes Related to Diseases of Education Ministry of China, Shaanxi Engineering and Research Center of Vaccine, Department of Physiology and Pathophysiology, School of Basic Medical Sciences, Xi’an Jiaotong University, Xi’an 710061, China; (Q.S.); (X.-M.W.); (H.-B.L.); (Y.L.); (W.-J.X.); (L.-Y.F.); (K.-L.L.); (J.-J.L.)
- Correspondence: (X.-J.Y.); (Y.-M.K.); Tel./Fax: +86-298-265-7677 (X.-J.Y. & Y.-M.K.)
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Shunnarah A, Tumlinson R, Calderón AI. Natural Products with Potential for Nonhormonal Male Contraception. JOURNAL OF NATURAL PRODUCTS 2021; 84:2762-2774. [PMID: 34633803 DOI: 10.1021/acs.jnatprod.1c00565] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Despite increased access to contraception over the last 60 years, unplanned pregnancies continue to contribute to economic disparities and overpopulation. Additionally, the burden of family planning falls primarily on women, as a reliable pharmaceutical male contraceptive has yet to be developed. The objective of this literature-based systematic review was to identify compounds for future study from natural sources with potential nonhormonal male contraceptive activity. After the exclusion of extracts and compounds with known hormonal mechanisms, 26 unique compounds were identified from natural species. The plant source, compound class, structure, target, mechanism of action, safety/toxicity profile, and in vitro, in vivo, and human studies for each compound were evaluated and discussed. β-Caryophyllene, embelin, oleanolic acid, triptonide, and N-butyldeoxynojirimycin (NB-DNJ) were selected as the five most promising compounds for future study using prespecified criteria such as number of studies, efficacy and safety profile, reversibility, and previous use in humans for any indication. In order to move forward with development of a male contraceptive from a natural source, additional studies are needed to determine the predicted safety and efficacy for in vivo and human clinical trials.
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Affiliation(s)
- Alana Shunnarah
- Department of Drug Discovery and Development, Auburn University Harrison School of Pharmacy, 2316 Walker Building, Auburn, Alabama 36849, United States
| | - Robin Tumlinson
- Department of Drug Discovery and Development, Auburn University Harrison School of Pharmacy, 2316 Walker Building, Auburn, Alabama 36849, United States
| | - Angela I Calderón
- Department of Drug Discovery and Development, Auburn University Harrison School of Pharmacy, 2316 Walker Building, Auburn, Alabama 36849, United States
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Syeda SS, Sánchez G, McDermott JP, Hong KH, Blanco G, Georg GI. The Na+ and K+ transport system of sperm (ATP1A4) is essential for male fertility and an attractive target for male contraception†. Biol Reprod 2020; 103:343-356. [PMID: 32588885 PMCID: PMC7401355 DOI: 10.1093/biolre/ioaa093] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2020] [Revised: 05/19/2020] [Indexed: 01/07/2023] Open
Abstract
One of the mechanisms that cells have developed to fulfil their specialized tasks is to express different molecular variants of a particular protein that has unique functional properties. Na,K-ATPase (NKA), the ion transport mechanism that maintains the transmembrane Na+ and K+ concentrations across the plasma membrane of cells, is one of such protein systems that shows high molecular and functional heterogeneity. Four different isoforms of the NKA catalytic subunit are expressed in mammalian cells (NKAα1, NKAα2, NKAα3, and NKAα4). NKAα4 (ATP1A4) is the isoform with the most restricted pattern of expression, being solely produced in male germ cells of the testis. NKAα4 is abundant in spermatozoa, where it is required for sperm motility and hyperactivation. This review discusses the expression, functional properties, mechanism of action of NKAα4 in sperm physiology, and its role in male fertility. In addition, we describe the use of NKAα4 as a target for male contraception and a potential approach to pharmacologically block its ion transport function to interfere with male fertility.
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Affiliation(s)
- Shameem Sultana Syeda
- Department of Medicinal Chemistry, College of Pharmacy, Institute for Therapeutics Discovery and Development, University of Minnesota, Minneapolis, MN 55414, USA
| | - Gladis Sánchez
- Department of Molecular and Integrative Physiology, University of Kansas Medical Center, Kansas City, KS 66160, USA
| | - Jeffrey P McDermott
- Department of Molecular and Integrative Physiology, University of Kansas Medical Center, Kansas City, KS 66160, USA
| | - Kwon Ho Hong
- Department of Medicinal Chemistry, College of Pharmacy, Institute for Therapeutics Discovery and Development, University of Minnesota, Minneapolis, MN 55414, USA
| | - Gustavo Blanco
- Department of Molecular and Integrative Physiology, University of Kansas Medical Center, Kansas City, KS 66160, USA
| | - Gunda I Georg
- Department of Medicinal Chemistry, College of Pharmacy, Institute for Therapeutics Discovery and Development, University of Minnesota, Minneapolis, MN 55414, USA
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Syeda SS, Sánchez G, Hong KH, Hawkinson JE, Georg GI, Blanco G. Design, Synthesis, and in Vitro and in Vivo Evaluation of Ouabain Analogues as Potent and Selective Na,K-ATPase α4 Isoform Inhibitors for Male Contraception. J Med Chem 2018; 61:1800-1820. [PMID: 29291372 PMCID: PMC5846083 DOI: 10.1021/acs.jmedchem.7b00925] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
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Na,K-ATPase α4 is a testis-specific
plasma membrane Na+ and K+ transporter expressed
in sperm flagellum.
Deletion of Na,K-ATPase α4 in male mice results in complete
infertility, making it an attractive target for male contraception.
Na,K-ATPase α4 is characterized by a high affinity for the cardiac
glycoside ouabain. With the goal of discovering selective inhibitors
of the Na,K-ATPase α4 and of sperm function, ouabain derivatives
were modified at the glycone (C3) and the lactone (C17) domains. Ouabagenin
analogue 25, carrying a benzyltriazole moiety at C17,
is a picomolar inhibitor of Na,K-ATPase α4, with an outstanding
α4 isoform selectivity profile. Moreover, compound 25 decreased sperm motility in vitro and in vivo and affected sperm
membrane potential, intracellular Ca2+, pH, and hypermotility.
These results proved that the new ouabagenin triazole analogue is
an effective and selective inhibitor of Na,K-ATPase α4 and sperm
function.
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Affiliation(s)
- Shameem Sultana Syeda
- Department of Medicinal Chemistry and Institute for Therapeutics Discovery and Development, College of Pharmacy , University of Minnesota , Minneapolis , Minnesota 55414 , United States
| | - Gladis Sánchez
- Department of Molecular and Integrative Physiology , University of Kansas Medical Center , Kansas City , Kansas 66160 , United States
| | - Kwon Ho Hong
- Department of Medicinal Chemistry and Institute for Therapeutics Discovery and Development, College of Pharmacy , University of Minnesota , Minneapolis , Minnesota 55414 , United States
| | - Jon E Hawkinson
- Department of Medicinal Chemistry and Institute for Therapeutics Discovery and Development, College of Pharmacy , University of Minnesota , Minneapolis , Minnesota 55414 , United States
| | - Gunda I Georg
- Department of Medicinal Chemistry and Institute for Therapeutics Discovery and Development, College of Pharmacy , University of Minnesota , Minneapolis , Minnesota 55414 , United States
| | - Gustavo Blanco
- Department of Molecular and Integrative Physiology , University of Kansas Medical Center , Kansas City , Kansas 66160 , United States
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