no, it seems u need to do a better homework:))...the packing systems for lenti and retro are the same except lenti need one extra...the difference is lenti vector has the bosai element which determine the nuclear import... that's why lenti can infect both dividing and non-dividing cells...frankly, I haven't seen any retro which doesn't infect non-dividing at all...
第二点,在表达载体上,第二代表达载体采用野生型的 HIV的LTR,而第三代载体采用 了chimeric的LTR,所以你经常会看到第三代表达载体的LTR写成CMV/LTR或者RSV/LTR用 来表示这种杂合LTR结构。 无论是lenti还是retro,LTR都既是promoter又是enhancer,比较一下lenti和retro的 LTR差别还是非常大的。 其实我们试过,lenti的包装系统可以包装retro的,而retro的也能包装lenti的表达载 体,只是效率非常非常的低,没有实际的可操作的意义,还不如直接用pcDNA3.1感染呢。 lenti里的特殊结构 WPRE (Woodchuck Posttranscriptional Regulatory Element) from the woodchuck hepatitis virus, increases transgene expression. cPPT (central Polypurine Tract) from the HIV-1 integrase gene, increases the copy number of lentivirus integrating into the host genome, thus increasing viral titer. WPRE and cPPT together produce at least a four-fold increase in protein expression in most cell types, compared to other vectors that do not contain these elements.
【在 n********k 的大作中提到】 : no, it seems u need to do a better homework:))...the packing systems for : lenti and retro are the same except lenti need one extra...the difference is : lenti vector has the bosai element which determine the nuclear import... : that's why lenti can infect both dividing and non-dividing cells...frankly, : I haven't seen any retro which doesn't infect non-dividing at all...