PMID- 17923118 OWN - NLM STAT- MEDLINE DCOM- 20071206 LR - 20191210 IS - 1090-2104 (Electronic) IS - 0006-291X (Linking) VI - 363 IP - 4 DP - 2007 Nov 30 TI - Stimulation by glutamine and proline of HGF production in hepatic stellate cells. PG - 978-82 AB - Amino acids regulate cellular functions in a variety of cell types. Most notably, leucine stimulates protein production through the mammalian target of rapamycin (mTOR)-dependent signaling pathway. We investigated the effect of amino acids on hepatocyte growth factor (HGF) production. Treatment with glutamine and proline, as well as leucine, increased HGF levels in the culture medium of a rat hepatic stellate cell clone in a dose-dependent manner. Up-regulation of phosphorylation of 70 kDa ribosomal protein S6 kinase and eukaryotic initiation factor 4E-binding protein 1 was not apparent in the cells after treatment with glutamine or proline. When rats received injections of glutamine or proline, hepatic and circulating HGF levels increased and peaked around 12h after treatment. Glutamine and proline may have the potential to stimulate HGF production but the mechanism underlying this stimulation seems not to be through the mTOR-dependent signaling pathway. FAU - Nishikawa, Takako AU - Nishikawa T AD - Department of Gastroenterology, Faculty of Medicine, University of Tokyo, Hongo 7-3-1, Bunkyo-ku, Tokyo 113-8655, Japan. FAU - Tomiya, Tomoaki AU - Tomiya T FAU - Ohtomo, Natsuko AU - Ohtomo N FAU - Inoue, Yukiko AU - Inoue Y FAU - Ikeda, Hitoshi AU - Ikeda H FAU - Tejima, Kazuaki AU - Tejima K FAU - Watanabe, Naoko AU - Watanabe N FAU - Tanoue, Yasushi AU - Tanoue Y FAU - Omata, Masao AU - Omata M FAU - Fujiwara, Kenji AU - Fujiwara K LA - eng PT - Journal Article DEP - 20071001 PL - United States TA - Biochem Biophys Res Commun JT - Biochemical and biophysical research communications JID - 0372516 RN - 0 (Carrier Proteins) RN - 0 (Culture Media) RN - 0 (Eif4ebp1 protein, rat) RN - 0 (Intracellular Signaling Peptides and Proteins) RN - 0 (Phosphoproteins) RN - 0RH81L854J (Glutamine) RN - 67256-21-7 (Hepatocyte Growth Factor) RN - 9DLQ4CIU6V (Proline) RN - EC 2.7.11.1 (Ribosomal Protein S6 Kinases, 70-kDa) SB - IM MH - Animals MH - Carrier Proteins/metabolism MH - Cell Line MH - Cell Separation MH - Culture Media MH - Glutamine/*pharmacology MH - Hepatocyte Growth Factor/*biosynthesis MH - Hepatocytes/*drug effects/*metabolism MH - Intracellular Signaling Peptides and Proteins MH - Male MH - Phosphoproteins/metabolism MH - Phosphorylation/drug effects MH - Proline/*pharmacology MH - Rats MH - Rats, Sprague-Dawley MH - Ribosomal Protein S6 Kinases, 70-kDa/metabolism EDAT- 2007/10/10 09:00 MHDA- 2007/12/07 09:00 CRDT- 2007/10/10 09:00 PHST- 2007/09/06 00:00 [received] PHST- 2007/09/20 00:00 [accepted] PHST- 2007/10/10 09:00 [pubmed] PHST- 2007/12/07 09:00 [medline] PHST- 2007/10/10 09:00 [entrez] AID - S0006-291X(07)02075-X [pii] AID - 10.1016/j.bbrc.2007.09.082 [doi] PST - ppublish SO - Biochem Biophys Res Commun. 2007 Nov 30;363(4):978-82. doi: 10.1016/j.bbrc.2007.09.082. Epub 2007 Oct 1.