Abstract:
:The purpose of this study was to compare the results of delivering low doses of growth factor iteratively (20 μg x5) via a reservoir system with results obtained following a single administration of 100 μg of growth factor. The delivery systems using gelatin microspheres (GMS) facilitate the controlled release of drugs. The controlled release of growth factors at specific sites is essential for vascular regeneration. An ischemic hind-limb model was established in nine rabbits. A reservoir system was implanted in each rabbit. GMS impregnated with basic fibroblast growth factor (bFGF) through an indwelling 2-Fr catheter was infused in the reservoir system. The rabbits were divided into three equal groups: group 1 received 20 μg iteratively (x5) via the reservoir, a single dose of 100 μg growth factor was administered to group 2 and group 3 was the saline control. The therapeutic effects were evaluated by measuring the thigh temperature, blood pressure and blood flow. An immunohistological analysis was also performed for CD31. No significant difference was observed between preand post-treatment (4 weeks following bFGF infusion) in the thigh temperature, blood pressure and blood flow results from each group. Pathological analysis revealed that the number of regenerated vessels was significantly higher in the group treated iteratively with low-dose bFGF.
journal_name
Exp Ther Medjournal_title
Experimental and therapeutic medicineauthors
Nitta N,Nitta-Seko A,Sonoda A,Watanabe S,Tsuchiya K,Murata K,Tabata Ydoi
10.3892/etm.2012.574subject
Has Abstractpub_date
2012-08-01 00:00:00pages
201-204issue
2eissn
1792-0981issn
1792-1015pii
etm-04-02-0201journal_volume
4pub_type
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journal_title:Experimental and therapeutic medicine
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