ArticleBritish journal of pharmacology2003
Endothelin as a causative factor of blunted volume reflex in diabetic rats.
Article in British journal of pharmacology, 2003. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 2 papers.
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2 citing papers in PubMed, 4 citations in OpenAlex.
- The acute pressure natriuresis response is suppressed by selective ETA receptor blockade.Clinical science (London, England : 1979) · 2021Article
- Endothelin, nitric oxide, and reactive oxygen species in diabetic kidney disease.Contributions to nephrology · 2011Review
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Authors and funding
2 authors at 2 institutions in 2 countries.
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Abstract
1. The study investigated whether endothelin (ET) contributed to the diabetes-associated alterations in volume reflex and characterised the receptor subtype that might be involved. The influence of renal sympathetic nerves on these aspects of ET was also examined. 2. Groups of nondiabetic and streptozotocin-induced diabetic rats were subjected to an acute isotonic saline volume expansion (VE), 10% body wt in the presence and absence of ET antagonists. 3. Cumulative urine sodium excretion (CuU(Na)V) after VE in diabetic rats reached values of 116+/-10 in the denervated and 74+/-6 micromol min(-1) g kidney wt(-1) in the innervated kidneys, which were both less (both P<0.001) than those achieved in the nondiabetic rats, at 267+/-9 in the denervated and 183+/-10 micromol min(-1) g kidney wt(-1) in the innervated kidney, respectively. 4. Diabetic rats pretreated with a nonselective ET(A)/ET(B) antagonist had an enhanced CuU(Na)V in the denervated kidneys by 37% (P<0.01) compared to that of untreated diabetic rats. At both doses of SB209670 these increments were less than the values obtained previously in nondiabetic rats (both P<0.01). The ET(A)/ET(B) antagonist had no meaningful effect on CuU(Na)V in the innervated kidneys of the diabetic rats, whereas previous studies in nondiabetic rats showed the response to be depressed. The CuU(Na)V responses to VE in diabetic rats given the selective ET(A) antagonist were not different from those observed in untreated diabetic rats, irrespective of whether or not the renal nerves were present. In nondiabetic rats, the ET(A) antagonist had an action similar to the mixed antagonist. 5. These findings demonstrate that activation of ET(B) receptors contributes to the depressed ability to excrete a saline load in diabetes mellitus, but its impact is obscured by the influence of the renal nerves.
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