| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 4302846 | Journal of Surgical Research | 2011 | 7 Pages |
BackgroundOur previous study demonstrated that bFGF-GH promoted healing of the pancreaticojejunostomy (PJ) in an animal model. We examined the healing process in detail to investigate the significance of treatment with basic fibroblast growth factor (bFGF) incorporated in gelatin hydrogel (GH) microspheres for anastomotic healing.Materials and MethodsThe optimal dose of bFGF was determined by administering bFGF concentrations of 1, 10, and 100μg in six beagle dogs and assessing the results on d 7. Next, 28 dogs received a jejunal subserosal injection of 10μg bFGF-GH or GH alone. The healing process was sequentially analyzed on d 4, 7, 21, and 28. The following types of assessment were performed: breaking strength test, pathologic examination, and calculations of collagen content, terminal deoxynucleotidyl transferase-mediated dUTP nick-end labeling (TUNEL) index, and microvessel density (MVD).ResultsThe administration of a bFGF dose of more than 10μg induced a significantly higher breaking strength and more abundant granulation tissues. Histologic observations of the bFGF-GH group on d 7 and the GH-alone group on d 21 revealed abundant granulation tissue with migrating fibroblasts, inflammatory cells, and capillaries. Marked neovascularization and dense collagen deposition were detected in both groups on d 28. The collagen content and breaking strength did not significantly differ between both groups on d 28. A significantly higher TUNEL index and a rapid decline in the number of vimentin-positive cells were detected in the bFGF-GH group from d 21 onward. The MVD in the bFGF-GH group was significantly higher from d 7 onwardConclusionsBasic FGF-GH administration can promote the rapid completion of PJ anastomosis and may help improve the quality of the healing of granulation tissue by conferring potent angiogenesis and accelerating apoptosis.
