title: Increased gene expression of urotensin II-related peptide in the hearts of rats with congestive heart failure.
abstract: Urotensin II-related peptide (URP) is a novel endogenous ligand for urotensin II receptor (UT-R). To investigate the pathophysiological role of URP in heart failure, we examined URP, UII and UT-R expression in hearts and kidneys of rats with congestive heart failure due to coronary ligation by quantitative RT-PCR and immunocytochemistry. Significantly increased expression levels of URP mRNA were found in the atrium, the right ventricle and the infarcted part of left ventricle of heart failure rats, when compared with sham-operated rats (about 2.2-fold, 2.7-fold and 3.9-fold, respectively). Expression levels of UII mRNA in the heart were about 10% of URP mRNA, and were slightly increased only in the infarcted part of left ventricle of heart failure rats, when compared with sham-operated rats. The expression levels of UT-R mRNA were increased in the atrium of heart failure rats. There was no significant change of URP, UII and UT-R mRNA expression levels in the kidney between heart failure and sham-operated rats. The myocardium was diffusely immunostained with URP in both rats. The blood vessels in the heart were positively immunostained with URP in heart failure rats, but not in sham-operated rats, whereas they were positively immunostained with UT-R in both rats. These findings suggest that the expression of URP, UII and UT-R is enhanced in failing heart, and the UII/URP/UT-R system has important pathophysiological roles in the progression of heart failure.
authors.affiliation: Department of Planning for Drug Development and Clinical Evaluation, Tohoku University Graduate School of Pharmaceutical Sciences and Medicine, 6-3 Aramaki-aza-Aoba, Aoba-ku, Sendai 980-8578, Japan.
authors.forename: Takashi
authors.initials: T
authors.lastname: Nakayama
authors.forename: Takuo
authors.initials: T
authors.lastname: Hirose
authors.forename: Kazuhito
authors.initials: K
authors.lastname: Totsune
authors.forename: Nobuyoshi
authors.initials: N
authors.lastname: Mori
authors.forename: Yutaka
authors.initials: Y
authors.lastname: Maruyama
authors.forename: Takahiro
authors.initials: T
authors.lastname: Maejima
authors.forename: Kana
authors.initials: K
authors.lastname: Minagawa
authors.forename: Ryo
authors.initials: R
authors.lastname: Morimoto
authors.forename: Kei
authors.initials: K
authors.lastname: Asayama
authors.forename: Masahiro
authors.initials: M
authors.lastname: Kikuya
authors.forename: Takayoshi
authors.initials: T
authors.lastname: Ohkubo
authors.forename: Junichiro
authors.initials: J
authors.lastname: Hashimoto
authors.forename: Masahiro
authors.initials: M
authors.lastname: Kohzuki
authors.forename: Kazuhiro
authors.initials: K
authors.lastname: Takahashi
authors.forename: Yutaka
authors.initials: Y
authors.lastname: Imai
mesh_terms: D000818:Animals; D019332:Endothelin-1 / Q000235:genetics / Q000378:metabolism; D015870:Gene Expression; D006333:Heart Failure / Q000235:genetics* / Q000378:metabolism / Q000473:pathology; D008297:Male; D009206:Myocardium / Q000166:cytology / Q000378:metabolism* / Q000473:pathology; D036361:Peptide Hormones / Q000235:genetics* / Q000378:metabolism; D051381:Rats; D011921:Rats, Inbred WKY; D043562:Receptors, G-Protein-Coupled / Q000235:genetics / Q000378:metabolism; D014579:Urotensins / Q000235:genetics* / Q000378:metabolism
chemical_list: D019332:Endothelin-1; D036361:Peptide Hormones; D043562:Receptors, G-Protein-Coupled; D014579:Urotensins; C473142:Uts2r protein, rat; C479081:urotensin II-related peptide, rat; C029677:urotensin II