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Adsorção de fibronectina a arcabouços de polihidroxibutirato aplicáveis à engenharia óssea

Authors: Mendonça, Roberta H.; Thiré, Rossana M. S. M.; Costa, Marysilvia F. da; S. Filho, Fernando C.;

Adsorção de fibronectina a arcabouços de polihidroxibutirato aplicáveis à engenharia óssea

Abstract

Fibronectina sérica humana foi adicionada à superfície de arcabouços de polihidroxibutirato (PHB) a fim de otimizar a adesão de osteoblastos humanos (HOB). Visando a criar sítios para a imobilização de fibronectina (FN), os arcabouços foram previamente tratados por meio de reação com etilenodiamina. O tratamento modificou a morfologia e a composição química dos arcabouços, possibilitando um aumento no teor de FN adsorvido à superfície. Imagens de AFM mostraram que as moléculas de FN assumiram conformações distintas, de acordo com a superfície na qual foi imobilizada. A FN adicionada aos arcabouços não modificados possivelmente assumiu uma conformação estendida, expondo os grupamentos RGD. Com isso, houve um aumento na adesão de HOB a estes materiais. Por outro lado, a FN na superfície dos arcabouços previamente tratados possivelmente apresentou-se na forma compacta, suprimindo a adesão de HOB.

Keywords

biomateriais, modificação de superfície, bone engineering, Polihidroxibutirato, Polyhydroxybutyrate, surface modification, engenharia óssea, biomaterials

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citations
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
5
Average
Average
Average
Green
gold