|

- 积分
- 2917
- 威望
- 2917
- 包包
- 6530
|


本帖最后由 细胞海洋 于 2014-10-24 09:51 编辑
7 v. u: j$ t. {5 _
' R2 F, v' F1 |% ]在此省略实验试剂和仪器设备步骤
* a7 F* ^! Q! ~. ^7 F1 D成纤维细胞的制备
2 t1 O+ a9 H+ g& p3 @9 w5 C5 n6 ^1. 从鼠胚胎(A,MEF)或者鼠尾尖(B,TTF)获得成纤维细胞。一般情况下,胚胎成纤维细胞能得到更多ips colonies
: D' _% B5 w& Q7 F, o: QA 时间:15d9 B2 d# \: e& {& \; ]# j
(1) 通过断颈杀死怀孕13.5d的雌鼠,分离子宫并用PBS作简单清洗。
1 N% p: y' q! [/ s(2) 用镊子将胚胎从胎盘和周围被膜组织中分离开来,将胚胎的头部,内脏组织和生殖腺去除- {( U" _( ^0 o; _* Y3 j! ]
(3) 将胚胎移至装有fresh PBS的100-mm dish中清洗,用剪刀将剩余体躯剪碎,移至装有0.1% trypsin/0.1 mM EDTA solution (3 ml per embryo)的50-ml conical tube,37°孵育20min
; x0 \- n" `5 i# r8 D, a- |$ `( s" P(4) 另加0.1% trypsin/0.1 mM EDTA solution (3 ml per embryo),37°孵育20min
, q7 \4 v) w+ ]; \+ _- s/ S) A( X(5) 加等量的FP medium (6 ml per embryo),反复吹打使组织充分分开
" j& d, @$ Z1 k6 S+ F(6) Keep the tissue/medium mixture still for 5 min at room temperature (20–25 °) 以去除杂质,将上清移至另一新的50-ml conical tube。200g离心5min,弃上清,使沉淀重新悬浮于新的介质中。+ w( E# I9 g4 I3 @0 r3 x4 t" T
(7) 细胞计数,在FP medium中调整为1 ×106 cells per ml。通常,一个胚胎能获得约1×107个细胞。将细胞悬浮液移至 100-mm 组织培养皿 (1 ×107 cells per dish), 37 °5% CO2 下孵育 24 h (passage 1)
+ {( H8 |6 H( `& v(8) 第二天,用PBS清洗以移除漂浮的细胞。
( b1 D% W, V; x$ y5 m: Q) r(9) 当细胞充分汇合时,去掉FP培养基,用PBS清洗一次,用1 ml of 0.05% trypsin and
5 q- {$ @- q$ Y5 r6 \! l0.53 mM EDTA 消化 5 min。脱落之后,加9 ml of FP medium并吹打使之悬浮。移至新的100-ml皿并作1:4的稀释(passage 2)。三代以内的MEFs作为ips的细胞来源,避免衰老。2 X) v" }) B5 |
, h3 b1 `2 W& v7 R* _: j5 F
尾尖(B)时间:10d7 ^, j g# l% E
在此略5 E& v1 J- @& w; Z
解冻 SNL cells TIMING 0.5 h2 s# b2 w+ h$ a1 l; V( U
(1) 准备9ml的SNL medium于15ml的tube中
2 X! P' ~4 L% z! t(2) 从液氮罐中取一小瓶冻SNL cells,放入37°水浴直至大部分细胞解冻(不是所有细胞), ]# r8 B: x4 ?8 a- h9 H
(3) 用酒精擦拭小瓶,打开瓶盖,将细胞悬浮液移至the tube prepared in Step(1)( [, k1 m0 Q4 M+ t- O, N
(4) 160g 离心5 min,弃上清- P* i3 A! `+ n$ G" {
(5) 用10 ml of SNL medium重新悬浮细胞,移至gelatin-coated 100-mm皿。37°,5% CO2
( `& ~- }, h! y' O: V孵育,直到达到80–90%汇合
& b) ^& b! t* E% x. ~4 S3 |* Z0 K9 Q m& @& U
CRITICAL STEP 不要让细胞过度汇合,否则会影响它们作为feeder的效果。+ n$ A2 h: y4 a- K" P$ }
" q0 O( A5 e# Z8 @SNL cells的传代 time:0.5h
& a. Z2 ~# l" U! n& Q5 W(1) 弃培养液,用PBS清洗细胞一次
/ H* M; a8 p" h(2) 吸出PBS,加入0.5 ml per dish of 0.25% trypsin/1 mM EDTA,室温下孵育1min
% a1 U& \* J: A! `4 Z" z: d0 w5 v(3) 加4.5 ml 的 SNL medium,吹打数次使细胞成为单层细胞4 G) ?& }% {3 y5 q+ Y
(4) 通过加入SNL medium调整细胞悬浮液为160ml,移至gelatin-coated dishes (10 ml per 10-cm dish)。This splits the cells 1:16。37 °, 5% CO2孵育直至细胞80–90%汇合。This should happen 3–4 d after passage
+ Z6 c- L8 H# f
. L- g- a3 F) Z& Q [Mitomycin C-inactivation of SNL cells TIMING 3 h
) \9 b6 S7 }9 W u0 _2 A9 X3 `(1) 直接加0.3ml 0.4 mg ml–1 mitomycin C solution 到the culture medium of SNL dish,swirl it briefly(短暂地),37 °, 5% CO2孵育2.25 h。The final concentration of mitomycin C will be 12 微g ml–1& R9 z5 s# u$ }9 ^5 Y' ~- c" h
(2) 孵育后,吸出所有的mitomycin C-containing medium,用10ml的PBS清洗细胞两次。
# t8 l6 t+ ]% d' G) V(3) 吸出PBS,加0.5 ml of 0.25% trypsin/1 mM EDTA,摇晃使cover the entire surface,然后室温下静置1min$ }) j i% \5 O* N; p1 n
(4) 加5ml SNL medium中和trypsin,反复吹打使细胞成为单层。Pool the cell suspension into a 50-ml tube ,细胞计数。Seed the cells on gelatin-coated dishes (1 × 106 cells per 100-mm tissue culture dish, or 1.5 ×105 cells per well of 6-well plate)4 K% P( a7 Y, y$ f2 N. H
(5) 细胞之间不应该有太大间隙。They should become ready for usage by the next day.; z, s# c( m+ U7 E
PAUSE POINT
/ U) w! [. w y7 p6 h$ p0 h+ gThe mitomycin C-treated SNL dishes 在用之前 can be left for 最多一周
& ?6 W+ e1 a5 k/ _$ P% N* N8 M3 H! L* O/ {" o
解冻 Plat-E cells TIMING 0.5 h(与解冻 SNL cells操作基本一样)3 w# f/ }& x) u# j
(1) 准备9ml的FP medium于15ml的tube中
& b J9 [1 b. v @& g(2) 从液氮罐中取一小瓶冻Plat-E cells,放入37°水浴直至大部分细胞解冻(不是所有细胞), k* g! ~3 }' A4 A! s; I
(3) 用酒精擦拭小瓶,打开瓶盖,将细胞悬浮液移至the tube prepared in Step(1)
S2 i6 r" B8 [2 }' a2 Z(4) 160g 离心5 min,弃上清! D) `. H, O! g+ j, \" q$ t# p
(5) 用10 ml of FP medium重新悬浮细胞,移至gelatin-coated 100-mm 皿。37°5% CO2孵育
0 { K4 t+ D8 ](6) 第二天,用新的培养基(添加了1 微g ml–1的puromycin和10 微g ml–1 的blastcidin S)替换原来的培养基。继续37 °, 5% CO2 孵育直至它们 80–90% 汇合
2 Y! W# g( n) \5 Y r' b8 {6 B- M) d; l
Plat-E cells传代 TIMING 0.5h/ u, V1 k' _- B" z) p6 a* g0 M
(1) 吸出PBS,加入4 ml per dish of 0.05% trypsin/0.53 mM EDTA,室温下孵育1min。轻拍,使细胞从培养皿上分离下来,用10 ml FP medium使细胞重新悬浮,转移至15ml tube中。180g离心5min,吸出上清4 Q; Q# _& m: i+ {0 s4 U# _
(2) 加入适当体积的FP medium,反复吹打,使细胞成为单层,Seed them to new 100-ml dishes at 1:4–1:6 dilution。细胞应该在2-3天内汇合
6 j( A# V0 r( iDay 1: retrovirus production; Plat-E preparation TIMING 1 h
d( c3 ^; e- X) P( w(1) 用PBS清洗细胞,加入4 ml 的0.05% trypsin/0.53 mM EDTA,室温下孵育1min
& f, N) d6 ^' d) G; O(2) 之后,加 10 ml FP medium 到 the Plat-E dish,轻轻吹打使细胞悬浮,将细胞悬浮液移至50ml tube。FP culture medium used in this period contains neither puromycin nor blasticidin S9 @& A% k0 n0 G% v9 h7 g# t
(3) 180g离心5min
; @, T- q" t0 Z0 M. Y(4) 弃上清,用手指轻拍以打散沉淀细胞,用适量的FP medium 使细胞重新悬浮
/ ~. h! p5 o8 e8 C% `(5) 细胞计数,用FP medium将细胞浓度调整为8 ×105 cells per ml
% x8 _% \! H; B; }, S4 [, Y(6) Seed cells at 8 ×106 cells (10 ml) per 100-mm culture dish, and 孵育过夜at 37 °, 5% CO2* g& D0 R# {/ Q9 l( Y$ l
Day 2: retrovirus production; transfection into Plat-E cells TIMING 1 h' z, _1 L) e8 T6 N' a
(1) 移 0.3 ml DMEM into a 1.5-ml tube
5 K! N3 @/ b; L" w0 u" B(2) 在(1)中的tube 中加入27微升的Fugene 6 transfection reagent,用手指轻拍混匀,室温下孵育5min' Y8 q6 T) f H9 K8 ?7 O/ Y- a# X
(3) 加入9 微克 of pMXs plasmid DNA (encoding Oct3/4, Sox2, Klf4 and c-Myc)到Fugene 6/DMEM-containing tube(drop-by-drop),用手指轻拍混匀,孵育15min
9 D: I; P2 ]- R; M" {(4) 逐滴将DNA/Fugene 6 complex 加到 Plat-E dish中,37 °, 5% CO2孵育过夜
& Q# D9 U3 w* K6 t5 u- O5 A) R' s' o5 j2 C( `0 R
关键步骤# _% }$ s$ W6 t3 D) {" @+ w/ [+ g2 t
Also transfect with a suitable control;we use pMXs retroviral vector GFP to monitor transfection efficiency。We routinely obtain efficiency >80%. High-efficient transfection is crucial for iPS cell induction
, P9 |$ D6 g% V8 T K* ?' X: q2 y3 W0 ? V; v
Day 3: retrovirus production (continued) TIMING 0.5 h
& J" Q1 F- _' }2 ^$ F" n吸出transfection reagent–containing medium,加入10ml新的FP培养基,return the cells to the incubator
1 n& Y8 h$ H B, Z. [1 j1 W3 CPreparation of fibroblasts TIMING 1 h1 a, M7 V( V% O
(1) 培养MEF或TTF(passage< 3)至约90%汇合in 10-cm dishes(约2×106 cells per dish)0 c/ M4 `# {7 d% x! ?
(2) 吸出培养基,用10ml的PBS清洗
0 j- e. M# ]% v, K' B' t(3) 弃PBS,加1 ml per dish of 0.05% trypsin/0.53 mM EDTA,37°孵育10min) s6 s) X- W; k; I3 f6 _$ T7 N3 [
(4) 加9ml培养基,使细胞悬浮且为单层,移至50ml tube中4 g# p/ K: t, |5 g9 W, f/ Y
(5) 细胞计数,调整细胞浓度为8×104 cells per ml。移10ml细胞悬浮液至有mitomycin C-inactivated SNL cells的100-mm dish (use puromycin-resistant feeder cells for NanogGFP-IRES-Puro)。37 °, 5% CO2孵育过夜。( D2 o$ Y, F3 i
Day 4: retroviral infection TIMING 0.5 h
$ ^9 x# l- M2 L(1) 用灭过的10-ml一次性注射器收集 medium from the Plat-E dish,通过 0.45-mm孔径大小的醋酸纤维素过滤器过滤,后移至15ml tube 。
: z1 n1 }* U" j% E) h l$ e2 _' T7 Z(2) 加5 微升的 8 mg ml–1 polybrene solution 到 the 10-ml filtrated virus-containing medium,轻轻的反复吹打使之混匀,The final concentration of polybrene will be 4微g ml–1; q8 j5 l/ i$ s# R6 ?5 o* }
(3) Make a mixture of equal parts of the medium containing Oct-3/4-, Sox2-, Klf4- and c-Myc-retroviruses.
3 `' x4 Q" E8 l( ]) B5 {& S5 ~关键步骤, L9 e- f6 Z8 f; g8 ?6 @0 z+ M3 H: w
Retroviruses should be used freshly.不要冷冻,否则您将不会获得ips细胞。Retrovirus滴度对于ips细胞产生相当重要,The freeze/thaw step 降低病毒滴度
! d; E- U# r- H3 _* |1 ~, o5 m1 [% Y( J) S5 p2 Z5 R* u! e
(4) 从fibroblast dish中吸出medium,加入10 ml of the polybrene/virus-containing medium。37 °, 5% CO2孵育4h或者过夜4 Q; \- b8 M" p( @" F
8 @* M7 P5 G& ]Day 5 and 6 TIMING 5 min each day9 u# M3 {( V0 i9 x5 @2 L" B4 \
24或者48h之后,从fibroblast dish中吸出 medium,加入10ml新鲜PBS
8 \1 }# S0 K9 R/ ]. HDay 7 TIMING 5 min
3 K4 k) J& U+ V9 A) T" p- l, ?, N弃培养基,加入10 ml ES medium,For Fbx15βgeo/βgeo selection, the medium should be supplemented with 0.3 mg ml–1 of G418
3 \; @" G, m5 G% ]Day 8–10 TIMING 5 min each day
) y6 X; _4 a. m7 I9 V: f每天更换培养基(分别在24,48,72h后)
4 w$ }$ G e% N( u# wDay 11 TIMING 5 min
6 d: C- u. E, A& ]& a For NanogGFP-IRES-Puro selection, add puromycin to the medium at the final concentration of 1.5 mg ml–1$ j! V6 f% e; Z& c# M' h
Day 12 TIMING 约5 min each day6 |6 P/ ~4 `& ?8 I. p p' t2 J: i
每天换液,直至colony becomes big enough to be picked up. Colonies should first become visible approximately 病毒转染1周后. They should become large enough to be picked up around day 20(TROUBLESHOOTING 1)
. ^6 I- g6 O/ U! N; `6 Z1 F4 c2 YCounting the colonies: 结晶紫染色 TIMING 1 d
9 t0 M) t/ O% C(1) colonies收集后,完全吸出PBS,加入5ml甲醇固定剩余细胞,室温下孵育1min
% `0 P( D* l) |* `2 g5 ]* x5 d) T7 ~(2) Wash the dishes twice with water.8 g4 n; ^0 r' T" j! `$ L/ g
(3) 加 5 ml 0.1% 结晶紫溶液到皿中,室温下孵育5min
1 R' v& F& C) \4 y(4) Wash the dishes with water+ X6 P$ m- D8 \2 V( E: m- Q& i
(5) Photograph the dishes and count the number of colonies.; \5 z6 U9 F' R8 Y8 r# z9 Y- u
- ~$ M0 q; X1 y* F! e5 tExpansion of iPS cells TIMING 1 h7 d& Q3 A8 W/ T. h/ G q
(1) 弃培养基,用1ml PBS清洗细胞% L6 a& F- a' j1 O' ^6 G9 u% h
(2) 彻底remove PBS,加 0.1 ml 0.25% trypsin/1 mM EDTA , 37 °孵育10 min2 [3 A# V6 s' @% v
(3) 加0.4 ml ES medium ,反复吹打细胞至成为单层$ ], W) S' B# j8 }1 k
(4) 将细胞悬浮液移至 a well of 6-well plate,加1.5 ml ES medium,37 °, 5% CO2孵育直至达到80–90%汇合in 6-well plates。At this point, prepare frozen stock of the cells, as follows(TROUBLESHOOTING 2). G& C- T1 K- M; r& N, K3 f& U
Preparation of freeze stock TIMING 1 h5 R; k l t4 n" b- B
(1) 弃培养基,用2ml PBS清洗
" R4 g4 a/ S; l, w6 `# ` ]7 }(2) 彻底remove PBS,加入0.3 ml 0.25% trypsin/1 mM EDTA , 37 °孵育10 min
7 D& i( Y7 d2 R+ v; ~(3) 加2ml ES medium ,反复吹打细胞至成为单层
: K! ]9 r% P2 F& Q" L# R% w(4) 将细胞悬浮液移至15ml tube,细胞计数,160g离心5min4 x% m7 d1 [4 Z& c* _6 `) l
(5) 弃上清,用ES重新悬浮细胞至2×106 cells per ml
$ s7 U8 D) `* a1 a7 M! d(6) Prepare 2×freezing medium (20% DMSO in ES medium) and 小份分装(每小瓶0.5 ml)3 R: O1 p. R/ V' r% D) o9 }
(7) 加0.5ml细胞悬浮液到freeze vials(冻存小瓶)中,轻轻混匀
' [2 x5 x3 ]* X9 h% G& ~(8) Put the vials in a cell-freezing container and keep it at –80 °overnight (TROUBLESHOOTING 3)' P& ^/ D2 e9 c8 T7 a9 p
PAUSE POINT
4 V. B: @# A$ VFor long-term storage, keep frozen cells in the gas phase of a liquid nitrogen tank.5 K( S( l$ k3 s7 w o
|
附件: 你需要登录才可以下载或查看附件。没有帐号?注册
-
总评分: 威望 + 50
包包 + 100
查看全部评分
|