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• W2318744023 abstract "Hyporeactivity to vasoconstrictors is one of the clinical manifestations of sepsis in man and experimental animals. The objective of the investigation was to examine whether atorvastatin can prevent hyporeactivity to norepinephrine (NE) in mouse aorta in sepsis, and if so, what are the mechanisms involved. Sepsis in mice was induced by cecal ligation and puncture. The aorta was harvested for tension experiment, nitric oxide (NO) and cyclic guanosine monophosphate measurements, and inducible NO synthase (iNOS) and α1D-adrenoceptor mRNA expression studies. In comparison with sham-operated controls, sepsis significantly decreased the contractile response to NE in the mouse aorta. Pretreatment with atorvastatin of septic animals completely restored NE-induced contractions to levels similar to those of sham-operated controls and significantly increased survival time and mean arterial pressure. Atorvastatin also attenuated iNOS-induced overproduction of NO, as well as iNOS mRNA expression. Accordingly, hyporeactivity to NE was not evident in tissues pretreated with selective iNOS inhibitor 1400W in sepsis. Although basal cyclic guanosine monophosphate accumulation in the aorta was reduced in sepsis, pretreatment of the tissues with soluble guanylyl cyclase inhibitor 1H-(1,2,4)oxadiazolo(4,3-a)quinoxalin-1-one (ODQ) partially restored the reactivity to NE. Interestingly, hyporeactivity to NE in sepsis was associated with a decreased α1D-adrenoceptor mRNA expression in the mouse aorta. Atorvastatin pretreatment, however, prevented the decrease in α1D-adrenoceptor mRNA expression in septic animals. In conclusion, atorvastatin seems to prevent hyporeactivity to vasoconstrictor NE in the aorta from septic mice through attenuation of overproduction of NO as well as improved α1D-adrenoceptor mRNA expression. The findings of the present study may explain the beneficial effects of atorvastatin on improved hemodynamic functions in sepsis." @default.
• W2318744023 created "2016-06-24" @default.
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• W2318744023 date "2011-07-01" @default.
• W2318744023 modified "2023-10-16" @default.
• W2318744023 title "Atorvastatin Prevents Vascular Hyporeactivity to Norepinephrine in Sepsis" @default.
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• W2318744023 doi "https://doi.org/10.1097/shk.0b013e31821a4002" @default.
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