PMID- 1707820 OWN - NLM STAT- MEDLINE DCOM- 19910523 LR - 20190624 IS - 0014-2999 (Print) IS - 0014-2999 (Linking) VI - 191 IP - 3 DP - 1990 Dec 4 TI - Impaired cyclic AMP generation in outer medullary tubules of gentamicin-treated rats. PG - 489-92 AB - We have examined the effects of chronic gentamicin treatment on arginine8-vasopressin (AVP)-dependent cyclic AMP (cAMP) metabolism in rat medullary collecting tubules (oMCT) and medullary thick ascending limbs of Henle's loop (mTALH). Gentamicin attenuated AVP-stimulated cAMP accumulation to a greater extent in the mTALH (delta -51%) than in the oMCT (delta -25%). The mechanism of attenuation differed between segments, and could not be attributed to either direct inhibition of adenylate cyclase activity nor direct potentiation of cAMP-phosphodiesterase activity. These data suggest that the gentamicin-induced decrease in renal concentrating ability may be due at least in part to reduced AVP-dependent cAMP accumulation in the oMCT and mTALH. FAU - Kidwell, D AU - Kidwell D AD - Department of Physiology and Biophysics, University of Kentucky College of Medicine, Lexington 40536-0084. FAU - Subramaniam, S AU - Subramaniam S FAU - Ott, C AU - Ott C FAU - Jackson, B AU - Jackson B LA - eng GR - RR05374/RR/NCRR NIH HHS/United States PT - Journal Article PT - Research Support, U.S. Gov't, P.H.S. PL - Netherlands TA - Eur J Pharmacol JT - European journal of pharmacology JID - 1254354 RN - 0 (Gentamicins) RN - 113-79-1 (Arginine Vasopressin) RN - 1F7A44V6OU (Colforsin) RN - E0399OZS9N (Cyclic AMP) RN - EC 3.1.4.17 (3',5'-Cyclic-AMP Phosphodiesterases) RN - EC 4.6.1.1 (Adenylyl Cyclases) RN - TBT296U68M (1-Methyl-3-isobutylxanthine) SB - IM MH - 1-Methyl-3-isobutylxanthine/pharmacology MH - 3',5'-Cyclic-AMP Phosphodiesterases/metabolism MH - Adenylyl Cyclases/metabolism MH - Animals MH - Arginine Vasopressin/antagonists & inhibitors/pharmacology MH - Colforsin/pharmacology MH - Cyclic AMP/*biosynthesis MH - Depression, Chemical MH - Gentamicins/*pharmacology MH - Kidney Medulla/drug effects/*metabolism MH - Kidney Tubules, Distal/drug effects/*metabolism MH - Loop of Henle/drug effects/metabolism MH - Male MH - Rats MH - Rats, Inbred Strains EDAT- 1990/12/04 00:00 MHDA- 1990/12/04 00:01 CRDT- 1990/12/04 00:00 PHST- 1990/12/04 00:00 [pubmed] PHST- 1990/12/04 00:01 [medline] PHST- 1990/12/04 00:00 [entrez] AID - 0014-2999(90)94186-2 [pii] AID - 10.1016/0014-2999(90)94186-2 [doi] PST - ppublish SO - Eur J Pharmacol. 1990 Dec 4;191(3):489-92. doi: 10.1016/0014-2999(90)94186-2.