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- W2030804740 abstract "This study determined whether transfer of the renin gene from the Dahl salt-resistant (Dahl R) strain into the Dahl salt-sensitive (SS) genetic background restores the relaxation of middle cerebral arteries (MCAs) to different vasodilator stimuli in S/renRR renin congenic (SS.SR-(D13N1 and Syt2)/Mcwi) (RGRR) rats maintained on low-salt (0.4% NaCl) diet.Responses to vasodilator stimuli were evaluated in isolated MCA from SS (Dahl SS/Jr/Hsd/MCWi), RGRR rats, and Dahl R rats.MCA from SS rats failed to dilate in response to acetylcholine (ACh; 10(-6) mol/l), hypoxia (PO2 reduction to 40-45 mm Hg), and iloprost (10(-11) g/ml). ACh- and hypoxia-induced dilations were present in Dahl R rats and restored in RGRR rats. MCA from RGRR and SS constricted in response to iloprost, whereas MCA from Dahl R rats dilated in response to iloprost. MCA from SS, RGRR, and Dahl R rats exhibited similar dilations in response to cholera toxin (10(-9) g/ml) and dialated in response to the nitric oxide (NO) donor DEA-NONOate (10(-5) mol/l).(i) Restoration of normal regulation of the renin-angiotensin system restores dilations to ACh and hypoxia that are impaired in SS rats, (ii) prostacyclin signaling is impaired in SS and RGRR rats but intact in Dahl R rats, indicating that alleles other than the renin gene affect vascular relaxation in response to this agonist; and (iii) vascular smooth muscle sensitivity to NO is preserved in SS and RGRR and is not responsible for impaired arterial relaxation in response to ACh in SS rats." @default.
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- W2030804740 date "2010-03-01" @default.
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- W2030804740 title "Restoration of Cerebral Vascular Relaxation in Renin Congenic Rats by Introgression of the Dahl R Renin Gene" @default.
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- W2030804740 doi "https://doi.org/10.1038/ajh.2009.236" @default.
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