ArticleAmerican journal of physiology. Renal physiology2012
Role of A1 receptors in renal sympathetic neurotransmission in the mouse kidney.
Article in American journal of physiology. Renal physiology, 2012. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 5 papers.
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5 citing papers in PubMed, 8 citations in OpenAlex.
- Characterization of the NPurinergic signalling · 2020Article
- Adenosine Receptors Influence Hypertension in Dahl Salt-Sensitive Rats: Dependence on Receptor Subtype, Salt Diet, and Sex.Hypertension (Dallas, Tex. : 1979) · 2018Article
- Alkaline Phosphatase Inhibitors Attenuate Renovascular Responses to Norepinephrine.Hypertension (Dallas, Tex. : 1979) · 2017Article
- Interactive roles of CD73 and tissue nonspecific alkaline phosphatase in the renal vascular metabolism of 5'-AMP.American journal of physiology. Renal physiology · 2014Article
- Role of CD73 in Renal Sympathetic Neurotransmission in the Mouse Kidney.Physiological reports · 2013Article
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6 authors at 1 institution in 1 country.
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Abstract
A(1) receptors may participate in renal sympathetic neurotransmission by enhancing the postjunctional effects of norepinephrine. The purpose of this study was to test this concept using A(1) receptor knockout (A(1)AR-/-) mice. In isolated kidneys from nontransgenic mice perfused with Tyrode's solution at a constant rate, renal sympathetic nerve stimulation (RSNS) increased (P < 0.0001) renal venous perfusate levels of inosine (adenosine metabolite) from 23.9 ± 3.7 to 32.7 ± 5.1, 68.2 ± 12.4, and 94.0 ± 14.3 ng/ml at 3, 5, and 7 Hz, respectively (n = 28), suggesting frequency-dependent production of adenosine. Conversely, RSNS decreased (P < 0.0001) renal venous perfusate levels of 5'-AMP (adenosine precursor) from 1.4 ± 0.3 to 1.1 ± 0.3, 0.80 ± 0.2, and 0.6 ± 0.2 ng/ml at 3, 5, and 7 Hz, respectively (n = 28), suggesting frequency-dependent increased metabolism of 5'-AMP. In kidneys from nontransgenic mice, blockade of adenosine receptors with 1,3-dipropyl-8-p-sulfophenylxanthine attenuated (P = 0.0130) vasoconstrictor responses to RSNS at 3, 5, and 7 Hz [control (n = 29): 22 ± 4, 34 ± 6, 42 ± 6 mmHg, respectively; 1,3-dipropyl-8-p-sulfophenylxanthine-treated (n = 11): 6 ± 1, 12 ± 3, 15 ± 3 mmHg, respectively]. In A(1)AR-/- kidneys (n = 10), vasoconstrictor responses to RSNS at 3, 5, and 7 Hz were 7 ± 3, 20 ± 5, and 36 ± 9 mmHg, respectively. In kidneys from wild-type littermates (n = 9), responses were 27 ± 9, 58 ± 14, and 59 ± 11 mmHg, respectively (effect of genotype: P = 0.0363). In kidneys from nontransgenic mice, 2-chloro-N(6)-cyclopentyladenosine (CCPA; highly selective A(1) receptor agonist) increased renal vasoconstriction induced by norepinephrine (P = 0.0008; n = 28). In kidneys from A(1)AR-/- the response to norepinephrine was attenuated and the ability of CCPA to enhance responses to norepinephrine was abolished. In conclusion, adenosine formed during RSNS enhances the postjunctional effects of released norepinephrine by activating A(1) receptors.
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