Document Detail


Roles of Renal Proximal Tubule Transport in Acid/Base Balance and Blood Pressure Regulation.
MedLine Citation:
PMID:  24982885     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
Sodium-coupled bicarbonate absorption from renal proximal tubules (PTs) plays a pivotal role in the maintenance of systemic acid/base balance. Indeed, mutations in the Na(+)-HCO3 (-) cotransporter NBCe1, which mediates a majority of bicarbonate exit from PTs, cause severe proximal renal tubular acidosis associated with ocular and other extrarenal abnormalities. Sodium transport in PTs also plays an important role in the regulation of blood pressure. For example, PT transport stimulation by insulin may be involved in the pathogenesis of hypertension associated with insulin resistance. Type 1 angiotensin (Ang) II receptors in PT are critical for blood pressure homeostasis. Paradoxically, the effects of Ang II on PT transport are known to be biphasic. Unlike in other species, however, Ang II is recently shown to dose-dependently stimulate human PT transport via nitric oxide/cGMP/ERK pathway, which may represent a novel therapeutic target in human hypertension. In this paper, we will review the physiological and pathophysiological roles of PT transport.
Authors:
Motonobu Nakamura; Ayumi Shirai; Osamu Yamazaki; Nobuhiko Satoh; Masashi Suzuki; Shoko Horita; Hideomi Yamada; George Seki
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Publication Detail:
Type:  REVIEW     Date:  2014-5-28
Journal Detail:
Title:  BioMed research international     Volume:  2014     ISSN:  2314-6141     ISO Abbreviation:  Biomed Res Int     Publication Date:  2014  
Date Detail:
Created Date:  2014-7-1     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  101600173     Medline TA:  Biomed Res Int     Country:  -    
Other Details:
Languages:  ENG     Pagination:  504808     Citation Subset:  -    
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