期刊
AMERICAN JOURNAL OF PHYSIOLOGY-RENAL PHYSIOLOGY
卷 312, 期 6, 页码 F998-F1015出版社
AMER PHYSIOLOGICAL SOC
DOI: 10.1152/ajprenal.00032.2017
关键词
TRPM6 and TRPV5 channels; furosemide; amiloride; calciuria; claudins
资金
- Fabrikant Vilhelm Pedersen og Hustrus Mindelegat
- Novo Nordisk Foundation
- Carlsberg Foundation
- A. P. Moller Foundation
- Beckett Foundation
- Lundbeck Foundation
- Natural Sciences and Engineering Research Council of Canada
- Canadian Institute of Health Research
- Lundbeck Foundation [R194-2015-1455] Funding Source: researchfish
- Novo Nordisk Fonden [NNF16OC0022040, NNF13OC0006513, NNF14OC0011749] Funding Source: researchfish
Calcium (Ca2+) and Magnesium (Mg2+) reabsorption along the renal tubule is dependent on distinct trans-and paracellular pathways. Our understanding of the molecular machinery involved is increasing. Ca(2+)and Mg2+ reclamation in kidney is dependent on a diverse array of proteins, which are important for both forming divalent cation-permeable pores and channels, but also for generating the necessary driving forces for Ca(2+)and Mg2+ transport. Alterations in these molecular constituents can have profound effects on tubular Ca(2+)and Mg2+ handling. Diuretics are used to treat a large range of clinical conditions, but most commonly for the management of blood pressure and fluid balance. The pharmacological targets of diuretics generally directly facilitate sodium (Na+) transport, but also indirectly affect renal Ca2+ and Mg2+ handling, i.e., by establishing a prerequisite electrochemical gradient. It is therefore not surprising that substantial alterations in divalent cation handling can be observed following diuretic treatment. The effects of diuretics on renal Ca2+ and Mg2+ handling are reviewed in the context of the present understanding of basal molecular mechanisms of Ca2+ and Mg2+ transport. Acetazolamide, osmotic diuretics, Na+/H+ exchanger (NHE3) inhibitors, and antidiabetic Na+/glucose cotransporter type 2 (SGLT) blocking compounds, target the proximal tubule, where paracellular Ca2+ transport predominates. Loop diuretics and renal outer medullary K+(ROMK) inhibitors block thick ascending limb transport, a segment with significant paracellular Ca2+ and Mg2+ transport. Thiazides target the distal convoluted tubule; however, their effect on divalent cation transport is not limited to that segment. Finally, potassium-sparing diuretics, which inhibit electrogenic Na+ transport at distal sites, can also affect divalent cation transport.
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