PMID- 8766019 OWN - NLM STAT- MEDLINE DCOM- 19961017 LR - 20190726 IS - 0031-6768 (Print) IS - 0031-6768 (Linking) VI - 432 IP - 3 DP - 1996 Jul TI - Roles of tyrosine kinase in insulin action on cell volume of fetal rat type II pneumocyte. PG - 571-3 AB - The aim of the present study was to investigate the roles of tyrosine kinase (TK) in the insulin action on cell volume in fetal rat (20-day gestational age) type II pneumocyte. Insulin (100 nmol/l) increased cell volume, and this insulin (100 nmol/l) action was completely blocked by 50 micromol/l bumetanide (BMT) and 10 micromol/l amiloride (AML). This observation indicates that 100 nmol/l insulin activates BMT-sensitive Na+/K+/2Cl- cotransporter and AML-sensitive pathways. The stimulatory action of 100 nmol/l insulin on BMT-sensitive Na+/K+/2Cl- cotransporter was completely abolished by 10 micromol/l lavendustin A (LAV-A, an inhibitor of TK), however 100 nmol/l insulin could stimulate AML-sensitive pathways even in LAV-A (10 micromol/l)-treated cells. These observations indicate that the insulin (100 nmol/l) action on the BMT-sensitive Na+/K+/2Cl- cotransporter is mediated through TK-dependent pathways, while 100 nmol/l insulin requires a TK-independent pathway to show the stimulatory action on the AML-sensitive pathways. From these observations we conclude that TK-dependent and -independent pathways are involved in the insulin (100 nmol/l) signaling in fetal rat type II pneumocyte. FAU - Marunaka, Y AU - Marunaka Y AD - MRC Group in Lung Development, Hospital for Sick Children Research Institute, University of Toronto, Faculty of Medicine, Toronto, Ontario, Canada M5G 1X8. FAU - Shintani, Y AU - Shintani Y FAU - Sugimoto, E AU - Sugimoto E FAU - Niisato, N AU - Niisato N LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - Germany TA - Pflugers Arch JT - Pflugers Archiv : European journal of physiology JID - 0154720 RN - 0 (Carrier Proteins) RN - 0 (Diuretics) RN - 0 (Enzyme Inhibitors) RN - 0 (Hypoglycemic Agents) RN - 0 (Insulin) RN - 0 (Phenols) RN - 0 (Sodium Channels) RN - 0 (Sodium-Potassium-Chloride Symporters) RN - 0Y2S3XUQ5H (Bumetanide) RN - 3Y0G32G2RV (lavendustin A) RN - 7DZO8EB0Z3 (Amiloride) RN - EC 2.7.10.1 (Protein-Tyrosine Kinases) SB - IM MH - Amiloride/pharmacology MH - Animals MH - Bumetanide/pharmacology MH - Carrier Proteins/metabolism MH - Cell Size/*drug effects MH - Cells, Cultured MH - Diuretics/pharmacology MH - Enzyme Inhibitors/pharmacology MH - Hypoglycemic Agents/*pharmacology MH - Insulin/*pharmacology MH - Lung/*cytology/drug effects/physiology MH - Phenols/pharmacology MH - Protein-Tyrosine Kinases/antagonists & inhibitors/*physiology MH - Rats MH - Rats, Wistar MH - Sodium Channels/drug effects/metabolism MH - Sodium-Potassium-Chloride Symporters EDAT- 1996/07/01 00:00 MHDA- 1996/07/01 00:01 CRDT- 1996/07/01 00:00 PHST- 1996/07/01 00:00 [pubmed] PHST- 1996/07/01 00:01 [medline] PHST- 1996/07/01 00:00 [entrez] AID - 10.1007/s004240050171 [doi] PST - ppublish SO - Pflugers Arch. 1996 Jul;432(3):571-3. doi: 10.1007/s004240050171.