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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)
 
 
 
 
 

Thromboxane A2 and development of genetic hypertension in the Lyon rat strain.

To determine whether the increased renal biosynthesis of thromboxane A2 observed in young genetically hypertensive rats of the Lyon strain could be involved in the development of their hypertension, Lyon hypertensive female rats received either thromboxane synthetase inhibitors (Dazmegrel or OKY 046) or a thromboxane A2 receptor antagonist (AH 23848) during their prehypertensive stage. Treatment from 5 to 9 weeks of age with Dazmegrel failed to reduce systolic blood pressure. When given from 3 to 9 weeks of age, Dazmegrel and OKY 046 induced a similar progressive and specific reduction (60%) in the urinary excretion of thromboxane B2 that was associated with a transient decrease in blood pressure level with Dazmegrel and a longer lasting blood pressure-lowering effect with OKY 046. AH 23848, given according to the same schedule, normalized the blood pressure level. This effect persisted 1 week after the cessation of the treatment. Interestingly, active doses of thromboxane synthetase inhibitors or of thromboxane A2 receptor blocker required a 3-week delay to exhibit their antihypertensive properties. It is concluded that 1) the elevated production of thromboxane A2 observed in young Lyon hypertensive rats is likely to participate actively in their blood pressure regulation and 2) this effect may be independent of its direct vasoconstrictor properties.[1]

References

  1. Thromboxane A2 and development of genetic hypertension in the Lyon rat strain. Geoffroy, J., Benzoni, D., Vincent, M., Sassard, J. Hypertension (1990) [Pubmed]
 
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