Enhanced angiogenesis by gelatin hydrogels incorporating basic fibroblast growth factor in rabbit model of hind limb ischemia.

Abstract

Recently we have developed new sustained release system of basic fibroblast growth factor (bFGF) using gelatin hydrogel as a carrier. Using this system, we examined the effect of topical sustained release of bFGF on angiogenesis and tissue blood perfusion in a rabbit model of hind limb ischemia. Thirty-two rabbits underwent excision of right femoral artery under general anesthesia. Two weeks later the rabbits were randomized into four groups (n = 8 each): no treatment, intramuscular injection of gelatin hydrogel alone, and intramuscular injection of gelatin hydrogel incorporating 30 microg and 100 microg of bFGF. Four weeks after each treatment, selective angiography, tissue blood flowmetry using laser Doppler perfusion imaging, and histological examination of thigh muscle were performed. In groups treated with bFGF incorporating gelatin hydrogel, tissue blood flow, number of arterioles, and vascular density were significantly increased in a dose-dependent manner 4 weeks after the treatment. Serum concentrations of bFGF and vascular endothelial growth factor were not elevated 4 weeks after the treatment. In conclusion, sustained release of bFGF using gelatin hydrogel augmented angiogenesis and improved tissue blood flow after excision of the femoral artery.

• Authors: Kazuhiko Doi, Tadashi Ikeda, Akira Marui, Toshihiro Kushibiki, Yoshio Arai, Keiichi Hirose, Yoshiharu Soga, Atsushi Iwakura, Koji Ueyama, Kenichi Yamahara, Hiroshi Itoh, Kazunobu Nishimura, Yasuhiko Tabata, Masashi Komeda
• Journal: Heart and vessels (Heart Vessels) Vol. 22 Issue 2 Pg. 104-8 (Mar 2007) ISSN: 0910-8327 [Print] Japan
• PMID: 17390205 (Publication Type: Journal Article, Research Support, Non-U.S. Gov't)

Chemical References

• Drug Carriers
• Hydrogels
• Vascular Endothelial Growth Factors
• Fibroblast Growth Factor 2
• Gelatin

Topics

• Animals
• Disease Models, Animal
• Drug Carriers
• Femoral Artery
• Fibroblast Growth Factor 2 (administration & dosage, blood, pharmacology)
• Gelatin
• Hindlimb (anatomy & histology, blood supply, diagnostic imaging)
• Hydrogels
• Injections, Intramuscular
• Ischemia
• Laser-Doppler Flowmetry
• Neovascularization, Physiologic (drug effects)
• Rabbits
• Radiography
• Regional Blood Flow (drug effects)
• Vascular Endothelial Growth Factors (blood)