title: Sustained release of VEGF through PLGA microparticles improves vasculogenesis and tissue remodeling in an acute myocardial ischemia-reperfusion model.
abstract: The use of pro-angiogenic growth factors in ischemia models has been associated with limited success in the clinical setting, in part owing to the short lived effect of the injected cytokine. The use of a microparticle system could allow localized and sustained cytokine release and consequently a prolonged biological effect with induction of tissue revascularization. To assess the potential of VEGF(165) administered as continuous release in ischemic disease, we compared the effect of delivery of poly(lactic-co-glycolic acid) (PLGA) microparticles (MP) loaded with VEGF(165) with free-VEGF or control empty microparticles in a rat model of ischemia-reperfusion. VEGF(165) loaded microparticles could be detected in the myocardium of the infarcted animals for more than a month after transplant and provided sustained delivery of active protein in vitro and in vivo. One month after treatment, an increase in angiogenesis (small caliber caveolin-1 positive vessels) and arteriogenesis (α-SMA-positive vessels) was observed in animals treated with VEGF microparticles (p<0.05), but not in the empty microparticles or free-VEGF groups. Correlating with this data, a positive remodeling of the heart was also detected in the VEGF-microparticle group with a significantly greater LV wall thickness (p<0.01). In conclusion, PLGA microparticle is a feasible and promising cytokine delivery system for treatment of myocardial ischemia. This strategy could be scaled up and explored in pre-clinical and clinical studies.
authors.affiliation: Department of Pharmacy and Pharmaceutical Technology, School of Pharmacy, University of Navarra, Spain.
authors.forename: Fabio R
authors.initials: FR
authors.lastname: Formiga
authors.forename: Beatriz
authors.initials: B
authors.lastname: Pelacho
authors.forename: Elisa
authors.initials: E
authors.lastname: Garbayo
authors.forename: Gloria
authors.initials: G
authors.lastname: Abizanda
authors.forename: Juan J
authors.initials: JJ
authors.lastname: Gavira
authors.forename: Teresa
authors.initials: T
authors.lastname: Simon-Yarza
authors.forename: Manuel
authors.initials: M
authors.lastname: Mazo
authors.forename: Esther
authors.initials: E
authors.lastname: Tamayo
authors.forename: Carlos
authors.initials: C
authors.lastname: Jauquicoa
authors.forename: Carlos
authors.initials: C
authors.lastname: Ortiz-de-Solorzano
authors.forename: Felipe
authors.initials: F
authors.lastname: Prósper
authors.forename: Maria J
authors.initials: MJ
authors.lastname: Blanco-Prieto
mesh_terms: D000818:Animals; D002196:Capillaries / Q000187:drug effects / Q000473:pathology / Q000502:physiology; D003331:Coronary Vessels / Q000187:drug effects / Q000473:pathology / Q000502:physiology; D003692:Delayed-Action Preparations; D004195:Disease Models, Animal; D004337:Drug Carriers / Q000737:chemistry*; D004339:Drug Compounding; D005260:Female; D019344:Lactic Acid / Q000737:chemistry*; D020678:Microscopic Angioscopy; D015428:Myocardial Reperfusion Injury / Q000188:drug therapy* / Q000473:pathology; D018919:Neovascularization, Physiologic / Q000187:drug effects*; D010316:Particle Size; D011100:Polyglycolic Acid / Q000737:chemistry*; D000077182:Polylactic Acid-Polyglycolic Acid Copolymer; D051381:Rats; D017207:Rats, Sprague-Dawley; D011994:Recombinant Proteins / Q000008:administration & dosage / Q000494:pharmacology / Q000627:therapeutic use; D012995:Solubility; D042461:Vascular Endothelial Growth Factor A / Q000008:administration & dosage* / Q000494:pharmacology / Q000627:therapeutic use
chemical_list: D003692:Delayed-Action Preparations; D004337:Drug Carriers; D011994:Recombinant Proteins; C467484:VEGFA protein, human; D042461:Vascular Endothelial Growth Factor A; D000077182:Polylactic Acid-Polyglycolic Acid Copolymer; D011100:Polyglycolic Acid; D019344:Lactic Acid