cyclic-gmp and dibutyryl-cyclic-3--5--cytidine-monophosphate

In thick ascending limbs (THALs), nitric oxide (NO) decreases NaCl reabsorption via cGMP-mediated inhibition of Na-K-2Cl cotransporter (NKCC2). In angiotensin (ANG II)-induced hypertension, endothelin-1 (ET-1)-induced NO production by THALs is impaired. However, whether this alters NO's natriuretic effects and the mechanisms involved are unknown. In other cell types, ANG II augments phosphodiesterase 5 (PDE5)-mediated cGMP degradation. We hypothesized that NO-mediated inhibition of NKCC2 activity and stimulation of cGMP synthesis are blunted via PDE5 in ANG II-induced hypertension. Sprague-Dawley rats were infused with vehicle or ANG II (200 ng·kg

Topics: Angiotensin II; Animals; Cyclic CMP; Cyclic GMP; Cyclic Nucleotide Phosphodiesterases, Type 5; Endothelin-1; Hypertension; Loop of Henle; Male; Nitric Oxide; Nitric Oxide Donors; Phosphodiesterase 5 Inhibitors; Rats; Rats, Sprague-Dawley; Solute Carrier Family 12, Member 1; Vardenafil Dihydrochloride