刚开始学习做feeder,总是出现下面几个问题: " @: o P% ?) n$ t6 C, c+ m1 l1、细胞消化后,特别粘稠,组织块不沉淀(加DNaseI没什么作用)# v) e: q, @" j( `/ E1 k1 c
2、勉强取上清,但是离心后沉淀总是漂浮的 ! }5 i& f2 {% K; q) z9 @/ w3、铺好的细胞,总是成团生长 , x( m O+ H. U" a$ y4 w - `% v' e5 @4 d& k各位大侠,怎么解决呢?. x) q, V0 S6 ?) U. K- z: Y" j
另:各位做feeder时,去头尾四肢内脏后消化多长时间?作者: iseeyou1210 时间: 2010-11-12 18:52
we do 3 rounds of trypsinization and for each time 3 min (mix in between).: m& d8 C$ j ~0 U1 t8 A, _
I used up to 1500rmp (around 500G here) to pellet the cells. * I2 k; u, C) o$ T `I never remove the head, tail....作者: 如来的观音 时间: 2010-11-12 19:43
楼上的回答不一般啊,佩服作者: 如来的观音 时间: 2010-11-12 19:43
楼上的回答不一般啊,佩服作者: cony 时间: 2010-11-13 23:06
1,消化完加完全培养基中止时的确会出现一团粘粘的东西,我的做法是用力甩,甩均匀了放一会,等没完全消化的大组织沉下去后再过筛。; G# M; E: k4 N/ W# n/ ~% i6 P/ J
2,如将细胞过筛,不会出现难取上清的问题,存在组织块悬浮等问题。 7 e9 n) k1 C- ^3成团生长是因为你连组织块一起培养了吧,尝试消化久一点,尽量消化成糜状 2 a2 s* y$ R0 V* T8 J4,我一般是剪碎后开始消化30MIN,如果组织块还比较明显,再消化一会,直至大量成糜状/ D1 u0 s' k' @& V, ^1 }1 g f
one more comment, for the cutting the tissue, I always put the embryos insides the 1ml of round bottom cyro-tube and use fine scissors to cut either 100 times or 1min together with 1ml of 1xpbs. the 3 rounds of tyrpsin with 2ml of trypsin in 37 degree (mix 2 times between gently) were performed. inbetween each round of trypsinization, transfer the supernatant to the tube containing the full medium with FCS.6 _$ X7 i% n1 m9 \. }1 t. `
then pellet the cell ........