title: Chimeric DNA-RNA hammerhead ribozyme targeting transforming growth factor-beta 1 mRNA inhibits neointima formation in rat carotid artery after balloon injury.
abstract: We designed and synthesized a chimeric DNA-RNA hammerhead ribozyme targeting transforming growth factor (TGF)-beta 1 mRNA and found that this ribozyme effectively and specifically inhibited growth of vascular smooth muscle cells. We examined the effects of the chimeric DNA-RNA hammerhead ribozyme targeting TGF-beta 1 mRNA on neointima formation and investigated the underlying mechanism to develop a possible gene therapy for coronary artery restenosis after percutaneous transluminal coronary angioplasty. Expression of mRNAs encoding TGF-beta 1, p27kip1, and connective tissue growth factor (CTGF) in carotid artery increased after balloon injury. Fluorescein-isothiocyanate (FITC)-labeled ribozyme was taken up into the midlayer smooth muscle of the injured carotid artery. Both 2 and 5 mg of ribozyme reduced neointima formation by 65% compared to that of controls. Ribozyme markedly decreased expression of TGF-beta 1 mRNA and protein in injured vessel. Mismatch ribozyme had no effect on expression of TGF-beta 1 mRNA protein in injured vessel. Ribozyme markedly decreased expression of fibronectin, p27kip1, and CTGF mRNAs in injured vessel, whereas a mismatch ribozyme had no effect on these mRNAs. These findings indicate that the chimeric DNA-RNA hammerhead ribozyme targeting TGF-beta 1 mRNA inhibits neointima formation in rat carotid artery after balloon injury with suppression of TGF-beta 1 and inhibition of extracellular matrix and CTGF. In conclusion, the hammerhead ribozyme against TGF-beta 1 may have promise as a therapy for coronary artery restenosis after percutaneous transluminal coronary angioplasty.
authors.affiliation: Second Department of Internal Medicine, Nihon University School of Medicine, Ooyaguchi-kami 30-1, Itabashi-ku, Tokyo 173-8610, Japan.
authors.forename: Hideyuki
authors.initials: H
authors.lastname: Ando
authors.forename: Noboru
authors.initials: N
authors.lastname: Fukuda
authors.forename: Motoko
authors.initials: M
authors.lastname: Kotani
authors.forename: Shin ichiro
authors.initials: Si
authors.lastname: Yokoyama
authors.forename: Satoshi
authors.initials: S
authors.lastname: Kunimoto
authors.forename: Koichi
authors.initials: K
authors.lastname: Matsumoto
authors.forename: Satoshi
authors.initials: S
authors.lastname: Saito
authors.forename: Katsuo
authors.initials: K
authors.lastname: Kanmatsuse
authors.forename: Hideo
authors.initials: H
authors.lastname: Mugishima
mesh_terms: D000818:Animals; D002339:Carotid Arteries / Q000187:drug effects* / Q000473:pathology; D020212:Carotid Artery Injuries / Q000188:drug therapy / Q000235:genetics / Q000473:pathology; D002404:Catheterization / Q000009:adverse effects*; D015316:Genetic Therapy / Q000379:methods; D008297:Male; D016337:RNA, Catalytic / Q000008:administration & dosage* / Q000235:genetics; D012333:RNA, Messenger / Q000008:administration & dosage / Q000235:genetics; D051381:Rats; D017208:Rats, Wistar; D011993:Recombinant Fusion Proteins / Q000008:administration & dosage / Q000235:genetics; D012754:Sharks; D016212:Transforming Growth Factor beta / Q000008:administration & dosage* / Q000235:genetics; D053773:Transforming Growth Factor beta1; D017539:Tunica Intima / Q000187:drug effects* / Q000293:injuries
chemical_list: D016337:RNA, Catalytic; D012333:RNA, Messenger; D011993:Recombinant Fusion Proteins; C508962:Tgfb1 protein, rat; D016212:Transforming Growth Factor beta; D053773:Transforming Growth Factor beta1; C427204:hammerhead ribozyme