title: Somatostatin is involved in anorexia in mice fed a valine-deficient diet.
abstract: The ingestion of a valine (Val)-deficient diet results in a significant reduction of food intake and body weight within 24 h, and this phenomenon continues throughout the period over which such a diet is supplied. Both microarray and real-time PCR analyses revealed that the expression of somatostatin mRNA was increased in the hypothalamus in anorectic mice that received a Val-deficient diet. On the other hand, when somatostatin was administered intracerebroventricularly to intact animals that were fed a control diet, their 24-h food intake decreased significantly. In addition, Val-deficient but not pair-fed mice or those fasted for 24 h showed a less than 0.5-fold decrease in the hypothalamic mRNA expression levels of Crym, Foxg1, Itpka and two unknown EST clone genes and a more than twofold increase in those of Slc6a3, Bdh1, Ptgr2 and one unknown EST clone gene. These results suggest that hypothalamic somatostatin and genes responsive to Val deficiency may be involved in the central mechanism of anorexia induced by a Val-deficient diet.
authors.affiliation: Department of Veterinary Physiology, Faculty of Agriculture, University of Miyazaki, Miyazaki, 889-2192, Japan.
authors.forename: Keiko
authors.initials: K
authors.lastname: Nakahara
authors.forename: Shiori
authors.initials: S
authors.lastname: Takata
authors.forename: Asami
authors.initials: A
authors.lastname: Ishii
authors.forename: Kenji
authors.initials: K
authors.lastname: Nagao
authors.forename: Makoto
authors.initials: M
authors.lastname: Bannai
authors.forename: Michio
authors.initials: M
authors.lastname: Takahashi
authors.forename: Noboru
authors.initials: N
authors.lastname: Murakami
mesh_terms: D000818:Animals; D008297:Male; D051379:Mice; D000855:Anorexia / Q000235:genetics / Q000378:metabolism / Q000503:physiopathology; D004435:Eating; D007031:Hypothalamus / Q000378:metabolism; D008810:Mice, Inbred C57BL; D000090803:mu-Crystallins; D013004:Somatostatin / Q000235:genetics / Q000378:metabolism; D015854:Up-Regulation; D014633:Valine / Q000172:deficiency; D015431:Weight Loss
chemical_list: C000716470:Crym protein, mouse; D000090803:mu-Crystallins; D013004:Somatostatin; D014633:Valine