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António T, Cosme D, Igreja B, Fraga S, Serrão MP, Pires NM, Soares-da-Silva P. The role of salt-inducible kinases on the modulation of renal and intestinal Na +,K +-ATPase activity during short- and long-term high-salt intake. Eur J Pharmacol 2021; 904:174153. [PMID: 33989615 DOI: 10.1016/j.ejphar.2021.174153] [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] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2021] [Revised: 04/24/2021] [Accepted: 04/30/2021] [Indexed: 11/29/2022]
Abstract
Type 1 salt-inducible kinases (SIK1) has been shown to act as a mediator during the cellular adaptation to variations in intracellular sodium in a variety of cell types. Type 2 SIK (SIK2) modulates various biological functions and acts as a signal transmitter in various pathways. To evaluate the role of both SIK isoforms in renal and intestinal Na+,K+-ATPase (NKA) activity, we made use of constitutive sik1-/- (SIK1-KO), sik2-/- (SIK2-KO), double sik1-/-sik2-/- (double SIK1*2-KO) knockout and wild-type (WT) mice challenged to a standard (0.3% NaCl) or chronic high-salt (HS, 8% NaCl) diet intake for 48 h or 12 weeks. Long-term HS intake in WT was accompanied by 2-fold increase in jejunal NKA activity and slight (~30% reduction) decreases in NKA in the ileum and cecum; none of these changes was accompanied by changes in the expression of α1-NKA. The ablation of SIK1 and SIK2 prevented the marked increase in jejunal NKA activity following the long-term HS intake. The ablation of SIK1 and SIK2 in mice on a long-term HS intake impacted differently in the ileum and cecum. The most interesting finding is that in SIK2-KO mice marked reductions in NKA activity were observed in the ileum and cecum when compared to WT mice, both on normal and long-term HS intake. In summary, SIK1 or SIK2 ablation on chronic high-salt intake is accompanied by modulation of NKA along the intestinal tract, which differ from those after an acute high-salt intake, and this may represent an absorptive compensatory mechanism to keep electrolyte homeostasis.
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Affiliation(s)
- Tatiana António
- Unit of Pharmacology and Therapeutics, Department of Biomedicine, Faculty of Medicine, University of Porto, 4200-319, Porto, Portugal; MedInUp - Center for Drug Discovery and Innovative Medicines, University of Porto, 4200-319, Porto, Portugal
| | - Dina Cosme
- Unit of Pharmacology and Therapeutics, Department of Biomedicine, Faculty of Medicine, University of Porto, 4200-319, Porto, Portugal; MedInUp - Center for Drug Discovery and Innovative Medicines, University of Porto, 4200-319, Porto, Portugal
| | - Bruno Igreja
- Division of Research and Development, BIAL-Portela & C(a), S.A, 4745-457, Coronado, Portugal
| | - Sónia Fraga
- Unit of Pharmacology and Therapeutics, Department of Biomedicine, Faculty of Medicine, University of Porto, 4200-319, Porto, Portugal; MedInUp - Center for Drug Discovery and Innovative Medicines, University of Porto, 4200-319, Porto, Portugal
| | - Maria Paula Serrão
- Unit of Pharmacology and Therapeutics, Department of Biomedicine, Faculty of Medicine, University of Porto, 4200-319, Porto, Portugal; MedInUp - Center for Drug Discovery and Innovative Medicines, University of Porto, 4200-319, Porto, Portugal
| | - Nuno M Pires
- Division of Research and Development, BIAL-Portela & C(a), S.A, 4745-457, Coronado, Portugal
| | - Patrício Soares-da-Silva
- Unit of Pharmacology and Therapeutics, Department of Biomedicine, Faculty of Medicine, University of Porto, 4200-319, Porto, Portugal; MedInUp - Center for Drug Discovery and Innovative Medicines, University of Porto, 4200-319, Porto, Portugal; Division of Research and Development, BIAL-Portela & C(a), S.A, 4745-457, Coronado, Portugal.
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