{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,3,13]],"date-time":"2026-03-13T17:15:06Z","timestamp":1773422106482,"version":"3.50.1"},"reference-count":25,"publisher":"American Physiological Society","issue":"9","funder":[{"DOI":"10.13039\/100000050","name":"HHS | NIH | National Heart, Lung, and Blood Institute (NHBLI)","doi-asserted-by":"publisher","award":["P01HL0289982"],"award-info":[{"award-number":["P01HL0289982"]}],"id":[{"id":"10.13039\/100000050","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["American Journal of Physiology-Renal Physiology"],"published-print":{"date-parts":[[2015,5,1]]},"abstract":"<jats:p> Afferent (Af-Art) and efferent arterioles resistance regulate glomerular capillary pressure. The nephron regulates Af-Art resistance via: 1) vasoconstrictor tubuloglomerular feedback (TGF), initiated in the macula densa via Na-K-2Cl cotransporters (NKCC2) and 2) vasodilator connecting tubuloglomerular feedback (CTGF), initiated in connecting tubules via epithelial Na channels (ENaC). Furosemide inhibits NKCC2 and TGF. Benzamil inhibits ENaC and CTGF. In vitro, CTGF dilates preconstricted Af-Arts. In vivo, benzamil decreases stop-flow pressure (P<jats:sub>SF<\/jats:sub>), suggesting that CTGF antagonizes TGF; however, even when TGF is blocked, CTGF does not increase P<jats:sub>SF<\/jats:sub>, suggesting there is another mechanism antagonizing CTGF. We hypothesize that in addition to NKCC2, activation of Na\/H exchanger (NHE) antagonizes CTGF, and when both are blocked CTGF dilates Af-Arts and this effect is blocked by a CTGF inhibitor benzamil. Using micropuncture, we studied the effects of transport inhibitors on TGF responses by measuring P<jats:sub>SF<\/jats:sub> while increasing nephron perfusion from 0 to 40 nl\/min. Control TGF response (\u22127.9 \u00b1 0.2 mmHg) was blocked by furosemide (\u22120.4 \u00b1 0.2 mmHg; P &lt; 0.001). Benzamil restored TGF in the presence of furosemide (furosemide: \u22120.2 \u00b1 0.1 vs. furosemide+benzamil: \u22124.3 \u00b1 0.3 mmHg; P &lt; 0.001). With furosemide and NHE inhibitor, dimethylamiloride (DMA), increase in tubular flow increased P<jats:sub>SF<\/jats:sub> (furosemide+DMA: 2.7 \u00b1 0.5 mmHg, n = 6), and benzamil blocked this (furosemide+DMA+benzamil: \u22121.1 \u00b1 0.2 mmHg; P &lt; 0.01, n = 6). We conclude that NHE in the nephron decreases P<jats:sub>SF<\/jats:sub> (Af-Art constriction) when NKCC2 and ENaC are inhibited, suggesting that in the absence of NKCC2, NHE causes a TGF response and that CTGF dilates the Af-Art when TGF is blocked with NKCC2 and NHE inhibitors. <\/jats:p>","DOI":"10.1152\/ajprenal.00605.2014","type":"journal-article","created":{"date-parts":[[2015,2,26]],"date-time":"2015-02-26T05:05:25Z","timestamp":1424927125000},"page":"F1026-F1031","source":"Crossref","is-referenced-by-count":22,"title":["Tubuloglomerular and connecting tubuloglomerular feedback during inhibition of various Na transporters in the nephron"],"prefix":"10.1152","volume":"308","author":[{"given":"Hong","family":"Wang","sequence":"first","affiliation":[{"name":"Division of Hypertension and Vascular Research, Department of Internal Medicine, Henry Ford Hospital, Detroit, Michigan;"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Martin A.","family":"D'Ambrosio","sequence":"additional","affiliation":[{"name":"Division of Hypertension and Vascular Research, Department of Internal Medicine, Henry Ford Hospital, Detroit, Michigan;"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"YiLin","family":"Ren","sequence":"additional","affiliation":[{"name":"Division of Hypertension and Vascular Research, Department of Internal Medicine, Henry Ford Hospital, Detroit, Michigan;"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Sumit R.","family":"Monu","sequence":"additional","affiliation":[{"name":"Division of Hypertension and Vascular Research, Department of Internal Medicine, Henry Ford Hospital, Detroit, Michigan;"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Pablo","family":"Leung","sequence":"additional","affiliation":[{"name":"Division of Hypertension and Vascular Research, Department of Internal Medicine, Henry Ford Hospital, Detroit, Michigan;"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Kristopher","family":"Kutskill","sequence":"additional","affiliation":[{"name":"Division of Hypertension and Vascular Research, Department of Internal Medicine, Henry Ford Hospital, Detroit, Michigan;"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Jeffrey L.","family":"Garvin","sequence":"additional","affiliation":[{"name":"Division of Hypertension and Vascular Research, Department of Internal Medicine, Henry Ford Hospital, Detroit, Michigan;"},{"name":"Department of Physiology and Biophysics, Case Western Reserve University, Cleveland, Ohio; and"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Branislava","family":"Janic","sequence":"additional","affiliation":[{"name":"Division of Hypertension and Vascular Research, Department of Internal Medicine, Henry Ford Hospital, Detroit, Michigan;"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Edward L.","family":"Peterson","sequence":"additional","affiliation":[{"name":"Department of Public Health Sciences, Henry Ford Hospital, Detroit, Michigan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Oscar A.","family":"Carretero","sequence":"additional","affiliation":[{"name":"Division of Hypertension and Vascular Research, Department of Internal Medicine, Henry Ford Hospital, Detroit, Michigan;"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"24","reference":[{"key":"B1","doi-asserted-by":"publisher","DOI":"10.1159\/000078712"},{"key":"B2","doi-asserted-by":"publisher","DOI":"10.1111\/j.1440-1681.1997.tb01243.x"},{"key":"B3","first-page":"S59","author":"Bell PD","year":"1991","journal-title":"Kidney Int Suppl"},{"key":"B4","first-page":"613","volume":"15","author":"Brunkhorst R","year":"1978","journal-title":"Proc Eur Dial Transplant Assoc"},{"key":"B5","doi-asserted-by":"publisher","DOI":"10.1152\/ajprenal.1998.275.3.F379"},{"key":"B6","doi-asserted-by":"publisher","DOI":"10.1038\/ki.1995.114"},{"key":"B7","doi-asserted-by":"publisher","DOI":"10.1139\/y84-065"},{"key":"B8","first-page":"523","volume":"14","author":"Johnston PA","year":"1992","journal-title":"Methods Find Exp Clin Pharmacol"},{"key":"B9","doi-asserted-by":"publisher","DOI":"10.1152\/ajprenal.1990.258.5.F1466"},{"key":"B10","doi-asserted-by":"publisher","DOI":"10.1172\/JCI40145"},{"key":"B11","doi-asserted-by":"publisher","DOI":"10.1111\/j.1523-1755.2005.00282.x"},{"key":"B12","volume-title":"Comprehensive Physiology","author":"Lorenz JN","year":"2011"},{"key":"B13","doi-asserted-by":"publisher","DOI":"10.1152\/ajprenal.00454.2003"},{"key":"B14","doi-asserted-by":"publisher","DOI":"10.1152\/ajprenal.00251.2001"},{"key":"B15","doi-asserted-by":"publisher","DOI":"10.1152\/ajprenal.2000.278.3.F452"},{"key":"B16","doi-asserted-by":"publisher","DOI":"10.1152\/physrev.2000.80.1.277"},{"key":"B17","doi-asserted-by":"publisher","DOI":"10.1046\/j.1523-1755.2003.00810.x"},{"key":"B18","doi-asserted-by":"publisher","DOI":"10.1038\/sj.ki.5002190"},{"key":"B19","doi-asserted-by":"publisher","DOI":"10.1038\/sj.ki.5002161"},{"key":"B20","doi-asserted-by":"publisher","DOI":"10.1046\/j.1523-1755.1998.06708.x"},{"key":"B21","doi-asserted-by":"publisher","DOI":"10.1161\/01.HYP.0000048863.75711.B2"},{"key":"B22","doi-asserted-by":"publisher","DOI":"10.1161\/HYPERTENSIONAHA.113.01846"},{"key":"B23","doi-asserted-by":"publisher","DOI":"10.1152\/ajprenal.00673.2011"},{"key":"B24","doi-asserted-by":"publisher","DOI":"10.1152\/ajprenal.00403.2010"},{"key":"B25","doi-asserted-by":"publisher","DOI":"10.1172\/JCI107721"}],"container-title":["American Journal of Physiology-Renal Physiology"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.physiology.org\/doi\/pdf\/10.1152\/ajprenal.00605.2014","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2019,9,8]],"date-time":"2019-09-08T21:14:11Z","timestamp":1567977251000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.physiology.org\/doi\/10.1152\/ajprenal.00605.2014"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2015,5,1]]},"references-count":25,"journal-issue":{"issue":"9","published-print":{"date-parts":[[2015,5,1]]}},"alternative-id":["10.1152\/ajprenal.00605.2014"],"URL":"https:\/\/doi.org\/10.1152\/ajprenal.00605.2014","relation":{},"ISSN":["1931-857X","1522-1466"],"issn-type":[{"value":"1931-857X","type":"print"},{"value":"1522-1466","type":"electronic"}],"subject":[],"published":{"date-parts":[[2015,5,1]]}}}