{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,7,22]],"date-time":"2026-07-22T23:31:50Z","timestamp":1784763110281,"version":"3.55.0"},"reference-count":38,"publisher":"American Physiological Society","issue":"4","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["American Journal of Physiology-Renal Physiology"],"published-print":{"date-parts":[[2009,10]]},"abstract":"<jats:p>Sirolimus, an antiproliferative immunosuppressant, induces hypomagnesemia and hypokalemia. Rosiglitazone activates renal sodium- and water-reabsorptive pathways. We evaluated whether sirolimus induces renal wasting of magnesium and potassium, attempting to identify the tubule segments in which this occurs. We tested the hypothesis that reduced expression of the cotransporter NKCC2 forms the molecular basis of this effect and evaluated the possible association between increased urinary excretion of magnesium and renal expression of the epithelial Mg<jats:sup>2+<\/jats:sup>channel TRPM6. We then analyzed whether rosiglitazone attenuates these sirolimus-induced tubular effects. Wistar rats were treated for 14 days with sirolimus (3 mg\/kg body wt in drinking water), with or without rosiglitazone (92 mg\/kg body wt in food). Protein abundance of NKCC2, aquaporin-2 (AQP2), and TRPM6 was assessed using immunoblotting. Sirolimus-treated animals presented no change in glomerular filtration rate, although there were marked decreases in plasma potassium and magnesium. Sirolimus treatment reduced expression of NKCC2, and this was accompanied by greater urinary excretion of sodium, potassium, and magnesium. In sirolimus-treated animals, AQP2 expression was reduced. Expression of TRPM6 was increased, which might represent a direct stimulatory effect of sirolimus or a compensatory response. The finding that rosiglitazone prevented or attenuated all sirolimus-induced renal tubular defects has potential clinical implications.<\/jats:p>","DOI":"10.1152\/ajprenal.90256.2008","type":"journal-article","created":{"date-parts":[[2009,8,6]],"date-time":"2009-08-06T00:55:23Z","timestamp":1249520123000},"page":"F916-F922","source":"Crossref","is-referenced-by-count":28,"title":["Rosiglitazone prevents sirolimus-induced hypomagnesemia, hypokalemia, and downregulation of NKCC2 protein expression"],"prefix":"10.1152","volume":"297","author":[{"given":"Cristianne da Silva","family":"Alexandre","sequence":"first","affiliation":[{"name":"Laboratory of Basic Science LIM-12, Nephrology Department,"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ana Carolina","family":"de Bragan\u00e7a","sequence":"additional","affiliation":[{"name":"Laboratory of Basic Science LIM-12, Nephrology Department,"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Maria Helo\u00edsa 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