例句與用法

1. Pretreat of 0 . 15mmol - l - 1 rgd ( arg - gly - asp ) reduces the interaction between cell wall and plasma membrane and inhibits the stress induced - aba accumulation by 50 percent
   本實驗結(jié)果表明：細胞壁與細胞膜之間相互作用的變化是煙草細胞對甘露醇脅迫處理的原初響應(yīng)。
2. Cell adhesion to surface of the substrate is essential to development of the anchorage - dependent cells . only after adhering to surface followed by spreading can cells develop and proliferate . most synthetic polymers used as orthopaedic matrix substitute present hydrophobicity , which may correlates to the low degree of cell attachment . modification with cell adhesion protein / peptides can be benificial to the cell adhesion on polymers and then affect the cell proliferation and differentiation . cell attachment to substrate is primarily mediated by integrins , a widely expressed family of heterodimeric surface receptors . most extrcellular matrix proteins such as fibronectin , osteopontin , collagen type i , bone sialoprotein and vitronectin contain an arg - gly - asp ( rgd ) sequence which is specific to the fixation of cell membrane receptors like integrin . the main aim of this research is to measure , assess adhesion , proliferation of rabbit marrow stromal cells ( mscs ) on the polymers coated by fibronectin , collagen type i or biotie gen , which includes : ( 1 ) biologic characteristics of rabbit mscs were observed by two types of separating method in primary culture . ( 2 ) adhesion , proliferation and differentiation of mscs cultured on polymers coated with biotiegen were assessed . ( 3 ) also , adhesion , proliferation and differentiation of mscs were assessed on plga film or porous plga substrates coated with fibronectin , or collagen type i respectively . ( 4 ) bone formation was observed on the porous plga substrates coated with collagen type i in vivo . this research aims to give new way to make novel synthetic bone with cell adhesion and high bone induction capabilities
   因此將這些蛋白包被、固定到材料表面，觀察骨組織工程種子細胞mscs細胞的粘附、生長特性是本研究的中心環(huán)節(jié)，并從以下方面進行探討： ( 1 )采用不同原代細胞分離方法，研究其對mscs細胞的生物學(xué)特性影響。 ( 2 )檢測基因勝肽膠對mscs細胞粘附、增殖及分化的影響。 ( 3 )分別采用型膠原及纖維粘連蛋白( fibronectin ， fn )包被聚乙醇酸-乳酸共聚物( poly ( 1actide - co - glycolide ) ， plga )膜及多孔塊型plga材料，觀察細胞在單層或三維培養(yǎng)狀態(tài)下，型膠原及fn對mscs細胞粘附、增殖及向成骨細胞分化效應(yīng)及能力。