title: Inhibitory effects of a biodegradable gelatin hydrogel sponge sheet on the progression of experimental abdominal aortic aneurysms.
abstract: We investigated the effects of a biodegradable gelatin hydrogel sponge sheet (GHSS) or GHSS incorporating basic fibroblast growth factor (GHSS + bFGF), which could prolong the effects of bFGF, on the progression of experimental abdominal aortic aneurysms (AAAs). Experimental AAAs were induced in male Sprague-Dawley rats by intra-aortic elastase infusion. The rats were divided according to the following treatments: (1) untreated, (2) GHSS alone, (3) GHSS incorporating 100 ng, 1 microg, and 10 microg of bFGF. GHSSs were placed over the elastase-infused aortas. After 14 days, the GHSS alone group and the three groups with GHSS + bFGF demonstrated significantly smaller aortic diameters than the untreated group, and these groups significantly attenuated a reduction of the elastic fibers and smooth muscle cells in the pathological findings. However, no additional therapeutic effect was noted between the GHSS alone and GHSS + bFGF groups. Immunohistochemical analysis revealed an increase of positive cells for endogenous bFGF in the media and adventitia of both the GHSS alone and GHSS + bFGF groups in comparison to the untreated group. In conclusion, GHSS itself possessed significant therapeutic effects on AAA progression by inducing the production of endogenous bFGF, leading to the preservation of elastic fibers and smooth muscle cells.
authors.affiliation: Division of Advanced Surgical Science and Technology, Tohoku University Graduate School of Medicine, Aoba-ku, Sendai, Japan. n-miyama@mail.tains.tohoku.ac.jp
authors.forename: Noriyuki
authors.initials: N
authors.lastname: Miyama
authors.forename: Akira
authors.initials: A
authors.lastname: Sato
authors.forename: Mitsunobu
authors.initials: M
authors.lastname: Matsubara
authors.forename: Tetsuo
authors.initials: T
authors.lastname: Watanabe
authors.forename: Yoshito
authors.initials: Y
authors.lastname: Ikada
authors.forename: Susumu
authors.initials: S
authors.lastname: Satomi
mesh_terms: D000818:Animals; D001011:Aorta / Q000187:drug effects* / Q000473:pathology; D017544:Aortic Aneurysm, Abdominal / Q000139:chemically induced / Q000188:drug therapy* / Q000473:pathology; D002317:Cardiovascular Agents / Q000008:administration & dosage* / Q000378:metabolism; D003692:Delayed-Action Preparations; D004195:Disease Models, Animal; D004305:Dose-Response Relationship, Drug; D004337:Drug Carriers; D016222:Fibroblast Growth Factor 2 / Q000008:administration & dosage* / Q000378:metabolism; D005781:Gelatin Sponge, Absorbable; D006801:Humans; D020100:Hydrogels; D008297:Male; D010196:Pancreatic Elastase; D051381:Rats; D017207:Rats, Sprague-Dawley; D011994:Recombinant Proteins / Q000008:administration & dosage; D013997:Time Factors
chemical_list: D002317:Cardiovascular Agents; D003692:Delayed-Action Preparations; D004337:Drug Carriers; D020100:Hydrogels; D011994:Recombinant Proteins; D016222:Fibroblast Growth Factor 2; D010196:Pancreatic Elastase