her project is very cool. indeed, when I was interviewed for a postdoc position years ago, a similar project was discussed with my boss, but unfortunately we did not pursue it due to many reasons. it is very pitiful to know that someone has worked it out.
one more caveat of cell-culture based screen: what if there is no good cultured cell line for the particular disease? not every cell type can be cultured in vitro, while fish represents the in vivo system for all cell/organ systems.
huma 心t 的至
【在 p*****m 的大作中提到】 : 你是说你有些具体措施使得找target更容易?或者干脆不管target?那是挺有意思的。 : 。。 : 我在想一个可能的思路就是直接screen某个target对应的药物,比如说吧,就把某huma : n disease protein放到fish里,引发didease,然后screen drug。这样就不需要担心t : arget问题了(做个WT fish control就行)。这样虽然很artificial,但是正像你说的至 : 少提供了药代方面的in vivo control,比cell line好。 : 不过这个算下来成本和in vitro screen+mouse model比哪个划算也不好说
嗯 这个有道理。尤其是某些病如果涉及到organ-specific的某蛋白的话,弄个 artificial fish model还是有意义的。我一直在想的一个是neurodegeneration。其实 ALS这种已经有人搞了。弄个human SOD1 mutant fish,screen就行。。
【在 M*****n 的大作中提到】 : one more caveat of cell-culture based screen: : what if there is no good cultured cell line for the particular disease? : not every cell type can be cultured in vitro, while fish represents the in : vivo system for all cell/organ systems. : : huma : 心t : 的至
fish eats fly/worm? 说实话没觉得。basic science的话最多同等level,因为没有 mechanistic insight。。。筛药另当别论
【在 M*****n 的大作中提到】 : 靠谱。 : mice eats fish, fish eats flies/worms. : it is tough to sell fish to NIH.
p*m
117 楼
我觉得这么说吧:现实中大概超过95%的lead compound在preclinical和phase I被kill 掉吧(我记不住了 也许更多)。主要原因一是药代有问题,比如说到不了该去的organ ,或者进了细胞被golgi修饰了被lysosome讲解了,blabla;第二个是safety,直接把动物 搞死了再有用也不行。这两点在cell based screen里都解决不了。 如果用fish替代cell based screen的话,这两方面都会有进步。药代肯定要好得多,至 少细胞内修饰问题应该是保守的;safety方面,这个要看做出来的结果fish和mammal有 多大相关性了。今年fish meeting我看到有两个pharma再尝试validate fish as a tox icity model,其中一个是pfizer还有一个忘了,还没有什么结果倒是,但是如果相关性 不错的话这方面fish也有优势。