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pubmed-article:14518341pubmed:abstractTextGene therapy was tested for inducing functional angiogenesis in the superficial rat epigastric island flap to allow earlier pedicle division. Autologous rat fibroblasts were grown, harvested, cultured and retrovirally transfected to produce PDGF-AA, an angiogenetically active protein. Stable gene expression was monitored by PDGF-AA ELISA. 180 animals were divided into 3 groups (I-III) and a bilateral flap created in each animal. In all experiments, the rightsided flap was subjected to experimental treatment and the left-sided flap served as control (1 ml saline 0.9%). During flap elevation, group I received 5 x 10(6) GMFB (genetically modified fibroblasts) plus 1 ml DMEM as medium. Group II was treated with 5 x 10(6) NMFB (non modified fibroblasts) plus 1 ml medium and group III received 1 ml medium alone. The flaps were sutured back and the vascular pedicle was bilaterally ligated and divided in each 10 animals during the following 6 days. 7 days later, the flaps were harvested, the amount of necrosis measured and histologically examined. The GMFB produced up the 560-times more PDGF-AA than the NMFB, measured by ELISA. The GMFB-treated flaps tolerated surgical division of the vascular pedicle significantly earlier than groups II and III. Histologically, fibroblasts persisted in all flaps of groups I and II without major inflammatory reaction. In all GMFB-treated flaps, massive angiogenesis could be demonstrated. By means of retroviral gene transfer autologous rat fibroblasts can be genetically modified for stable expression of the PDGF-A gene to produce high amounts of PDGF-AA, which is angiogenetically active. After injection into the panniculus carnosus, these cells induce functional angiogenesis to permit earlier division of the vascular pedicle in this flap model.lld:pubmed
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pubmed-article:14518341pubmed:authorpubmed-author:MorganJ RJRlld:pubmed
pubmed-article:14518341pubmed:authorpubmed-author:MachensH GHGlld:pubmed
pubmed-article:14518341pubmed:authorpubmed-author:BerthiaumeFFlld:pubmed
pubmed-article:14518341pubmed:authorpubmed-author:BergerA CAClld:pubmed
pubmed-article:14518341pubmed:authorpubmed-author:StefanovichPPlld:pubmed
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pubmed-article:14518341pubmed:volume115lld:pubmed
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pubmed-article:14518341pubmed:pagination681-7lld:pubmed
pubmed-article:14518341pubmed:dateRevised2008-2-20lld:pubmed
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pubmed-article:14518341pubmed:year1998lld:pubmed
pubmed-article:14518341pubmed:articleTitle[Functional angiogenesis induction in epigastric islet flap rat model after genetic modification of fibroblasts].lld:pubmed
pubmed-article:14518341pubmed:affiliationKlinik für Plastische, Hand- und Wiederherstellungschirurgie, Medizinischen Hochschule Hannover.lld:pubmed
pubmed-article:14518341pubmed:publicationTypeJournal Articlelld:pubmed
pubmed-article:14518341pubmed:publicationTypeEnglish Abstractlld:pubmed