为了构建能够有效进入血脑屏障的新型融合蛋白PTD-maxadilan(PTD-MAX),设计编码融合蛋白PTD-MAX基因,克隆到表达载体pKYB,构建重组表达载体pKYB-PTD-MAX,转化大肠杆菌ER2566中。采用IPTG诱导由PTD-MAX、内含肽和几丁质组成的融合蛋白的表达。利用IMPACT(Intein Mediated Purification with an Affinity Chitin-binding Tag)介导的纯化系统制备目的融合蛋白PTD-MAX。所得的目的蛋白经激光飞行质谱测定分子量,结果与理论值相符。动物实验结果表明融合蛋白PTD-MAX能够有效穿越血脑屏障,重组PTD-MAX具有比天然maxadilan更显著(P<0.05)的抑制小鼠摄食的作用。融合蛋白PTD-MAX的构建和制备为其生物学功能的深入开发奠定了基础。
Alzheimer’s disease(AD),which is one type of senile deimentia, has three remarkable pathologic characteristics-senile plaque,neurofibrillar tangles and neuronal death. As a neurotrophic factor, basic fibroblast growth factor(bFGF)is closely related to AD. This article reviewed the interaction between bFGF and AD-associated gene products(such as amyliod β protein,presenilin, apoloprotein E and microtubulin associated protein tau)and neuronal apoptosis. Some researchers suggested that bFGF may be put forward as potential therapeutic agent in AD and play a role in preventing or retarding the pathological process of this disease, alleviating or even eradicating the pathological insults of this disease.
