![Rank: 4](static/image/common/star_level3.gif)
- 积分
- 2917
- 威望
- 2917
- 包包
- 6530
|
![精华](static/image/stamp/001.gif)
本帖最后由 细胞海洋 于 2014-10-24 09:51 编辑
: E- w3 \( f: Q+ m( a
# R9 ?2 E- u3 a/ P( S( i在此省略实验试剂和仪器设备步骤# q( Z! d X) s; e3 I* S
成纤维细胞的制备- x5 e, k6 E! D2 Q
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 colonies0 @4 R" G" f/ ?1 ~
A 时间:15d R0 N. k8 v' Y# L0 a Y; [) }
(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。
: \% t- E N2 ~7 ~9 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
: }2 F- I' t- S# \0 Y(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
( `" I7 j& V/ O# |$ @(4) 另加0.1% trypsin/0.1 mM EDTA solution (3 ml per embryo),37°孵育20min
1 ^6 ]5 y5 }2 _' R& Q3 X(5) 加等量的FP medium (6 ml per embryo),反复吹打使组织充分分开
( U6 O v ^# K$ B% Y+ p(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。6 o1 n' H- m% E8 ?0 Z
(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)6 E, L1 _0 x- Q
(8) 第二天,用PBS清洗以移除漂浮的细胞。6 M7 V7 W! X# \! X
(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; Z$ [3 |# q0 r, l$ S3 `3 K
0.53 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。
8 H5 u+ w, ^) f6 x& a X( g6 s3 K" r C# y: b' T
尾尖(B)时间:10d$ m _: L' A3 p3 i7 h
在此略
2 N1 o# i \6 C% u" w; d解冻 SNL cells TIMING 0.5 h/ V& ?' n2 _1 i2 e3 k- g
(1) 准备9ml的SNL medium于15ml的tube中
8 Y. L& [8 f- |& D9 X(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)
& o P8 @9 \$ C# z K- y(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)
; i, _+ O% q3 o) ~(4) 160g 离心5 min,弃上清3 ?5 H: B" T' H. @
(5) 用10 ml of SNL medium重新悬浮细胞,移至gelatin-coated 100-mm皿。37°,5% CO2
' _8 O9 W' a5 c# c# A: |6 l+ L孵育,直到达到80–90%汇合& j+ f2 t, g9 w+ O( B
1 J) { r" W9 S. D& g, C( lCRITICAL STEP 不要让细胞过度汇合,否则会影响它们作为feeder的效果。/ N6 h( F( }) f$ Q4 R, X. b' L( F
( e: A& w: Y( `2 F0 Y; J$ {: h1 C2 DSNL cells的传代 time:0.5h
( T, a- E/ c& Z* {6 ^1 A(1) 弃培养液,用PBS清洗细胞一次
$ N3 G; ]/ e& D5 y2 u% W6 ], E(2) 吸出PBS,加入0.5 ml per dish of 0.25% trypsin/1 mM EDTA,室温下孵育1min) R3 D8 P2 I c @9 a# O8 u
(3) 加4.5 ml 的 SNL medium,吹打数次使细胞成为单层细胞
. Q( `, }: B ]; p+ n: X. N(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 passage2 e* n" }& ^$ K; }
1 _4 C7 }/ R9 M" UMitomycin C-inactivation of SNL cells TIMING 3 h4 T9 A% T' N! @- K D
(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/ k3 p# ^2 g1 a/ h5 J4 D4 ~/ ?% e
(2) 孵育后,吸出所有的mitomycin C-containing medium,用10ml的PBS清洗细胞两次。
! _1 A- E6 G0 S9 k$ h(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
1 t: S8 V! P# K(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)( N. g" v/ |$ P5 X5 S
(5) 细胞之间不应该有太大间隙。They should become ready for usage by the next day.
2 i4 T# {. i5 C; C0 `PAUSE POINT" |5 \' q/ Y' C9 F
The mitomycin C-treated SNL dishes 在用之前 can be left for 最多一周
$ E9 a; j, P3 v: j
$ u1 j0 y I! }/ C0 Q' \7 z6 V# _; ~6 Y解冻 Plat-E cells TIMING 0.5 h(与解冻 SNL cells操作基本一样)
, ~7 A5 Q0 D- a1 P, M% ?+ C$ [(1) 准备9ml的FP medium于15ml的tube中
0 r& n+ z U! b# v+ }. j, i, L(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)
* I5 K6 j8 N1 @$ ]" j(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)
# Q% y' s4 X y+ m) p' ^" h2 f" I(4) 160g 离心5 min,弃上清1 N2 ]( H o. e0 }
(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/ m6 U% { i$ j) t* K2 E. d
(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
; f5 d! r: |3 [ m: M8 q6 D8 i1 S) t
Plat-E cells传代 TIMING 0.5h, i- G" Z9 k( |3 T' [! p7 Y
(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
: [. A3 C5 L/ O' ?1 a7 L3 ] w0 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
! B0 ^, f' ^$ ^Day 1: retrovirus production; Plat-E preparation TIMING 1 h" Q! g* s; @" s
(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
l5 _+ J+ x6 r Q/ }( m(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 S
" I, D. l1 @0 L' e5 d& a(3) 180g离心5min
; Q+ j4 `# L5 V# ^: ]4 j1 i. X(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: F' M' @6 m9 o' H! g: Q9 k& U( X
(5) 细胞计数,用FP medium将细胞浓度调整为8 ×105 cells per ml. A3 n# Y9 {; d0 e, a
(6) Seed cells at 8 ×106 cells (10 ml) per 100-mm culture dish, and 孵育过夜at 37 °, 5% CO2
; k, |. H. ~# S1 e6 u/ H2 vDay 2: retrovirus production; transfection into Plat-E cells TIMING 1 h2 H. [/ D1 A( b( G& n3 _0 R' `
(1) 移 0.3 ml DMEM into a 1.5-ml tube$ R% Y+ _# d' l
(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
$ E& I- x& E3 N: w/ w* I! ^. O(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
: I1 S7 E `4 n: m% b(4) 逐滴将DNA/Fugene 6 complex 加到 Plat-E dish中,37 °, 5% CO2孵育过夜' |4 [! O# m* _! i9 u
3 ?' w+ G4 b9 w! \1 c2 H5 Z
关键步骤3 n* @3 ~6 T8 ^9 o( L/ }
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# e1 _3 F: G5 A
" ~8 X( `0 r- t% P0 k1 MDay 3: retrovirus production (continued) TIMING 0.5 h: [8 L+ u: _$ G y! s
吸出transfection reagent–containing medium,加入10ml新的FP培养基,return the cells to the incubator
+ @7 m* {) D! `/ f% o3 D$ m# kPreparation of fibroblasts TIMING 1 h2 Q; B, y4 K4 p- I
(1) 培养MEF或TTF(passage< 3)至约90%汇合in 10-cm dishes(约2×106 cells per dish) }. G" [5 I9 B5 @/ x" @7 f& y
(2) 吸出培养基,用10ml的PBS清洗7 h6 R D: Q d
(3) 弃PBS,加1 ml per dish of 0.05% trypsin/0.53 mM EDTA,37°孵育10min; Z- `) `: B/ D0 g* w. i- D
(4) 加9ml培养基,使细胞悬浮且为单层,移至50ml tube中+ k% Z# {* y4 H% s% U5 v
(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。# _" V" C. H2 P# d" r
Day 4: retroviral infection TIMING 0.5 h6 a; i* A6 O7 m" l6 P* 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 。
! W# X. z& I$ c6 Q4 _& |: P(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, V {; s* R. M- x7 e6 q
(3) Make a mixture of equal parts of the medium containing Oct-3/4-, Sox2-, Klf4- and c-Myc-retroviruses.
; \4 k* b/ v$ c" [关键步骤
# p6 c" b& }$ J! L' o- `+ yRetroviruses 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2 |3 T) Z) \ o0 F3 |
; \! H' V' p3 u6 ^(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) z4 C7 K; t% G- K0 s8 _
$ N5 y4 y# z& q
Day 5 and 6 TIMING 5 min each day
5 c: |( V2 H F. Y% d5 c24或者48h之后,从fibroblast dish中吸出 medium,加入10ml新鲜PBS A1 u7 f5 _( E# ]9 I* ~
Day 7 TIMING 5 min$ F |* z; d1 s: @/ ?# |
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
: R! B7 w9 p# f' jDay 8–10 TIMING 5 min each day* [8 \3 W2 Y V3 J V
每天更换培养基(分别在24,48,72h后); U' l. q1 ~ e: q% y
Day 11 TIMING 5 min
3 F. S" | ?) ]( j5 J% N For NanogGFP-IRES-Puro selection, add puromycin to the medium at the final concentration of 1.5 mg ml–1
( K. E( H8 z0 jDay 12 TIMING 约5 min each day/ {6 O Y5 W8 D& l7 K0 Y
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)
" W$ G$ Z3 f. A% BCounting the colonies: 结晶紫染色 TIMING 1 d2 ~+ q, ~. p4 h6 \, [
(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) l T: ]7 E- \: _3 @
(2) Wash the dishes twice with water.
, K1 o; M, J+ m; G# f) I(3) 加 5 ml 0.1% 结晶紫溶液到皿中,室温下孵育5min6 _" Z7 ^+ C6 L( A' Y* w) H4 E
(4) Wash the dishes with water
, E, P$ @7 w: V* {: ^3 a(5) Photograph the dishes and count the number of colonies.
; x* G$ F J/ c0 ?2 |- @
' v/ l5 M7 w, @1 k) WExpansion of iPS cells TIMING 1 h4 P5 ~& c7 c4 e% ~6 B" j) ?5 Z
(1) 弃培养基,用1ml PBS清洗细胞! W A2 l0 J3 k6 ?
(2) 彻底remove PBS,加 0.1 ml 0.25% trypsin/1 mM EDTA , 37 °孵育10 min9 K4 F6 s& v% Y" }6 L/ X
(3) 加0.4 ml ES medium ,反复吹打细胞至成为单层3 F+ I" a" M1 c
(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)
; S. U) o* u, r; ^0 HPreparation of freeze stock TIMING 1 h& N `0 E9 B4 @/ y$ O
(1) 弃培养基,用2ml PBS清洗
; R3 b! m8 G- ?: c7 a(2) 彻底remove PBS,加入0.3 ml 0.25% trypsin/1 mM EDTA , 37 °孵育10 min
2 G# ?. j3 \7 Q2 T5 \(3) 加2ml ES medium ,反复吹打细胞至成为单层5 t9 Y3 H, E4 j! P) y1 D" s1 Z
(4) 将细胞悬浮液移至15ml tube,细胞计数,160g离心5min6 v& O- j$ X6 G0 l
(5) 弃上清,用ES重新悬浮细胞至2×106 cells per ml
. V0 \+ y( t5 j' t" ?. |8 R' q(6) Prepare 2×freezing medium (20% DMSO in ES medium) and 小份分装(每小瓶0.5 ml)2 t* Y+ R3 [, i# h. I6 c9 P
(7) 加0.5ml细胞悬浮液到freeze vials(冻存小瓶)中,轻轻混匀: n1 N- O3 L+ I( c
(8) Put the vials in a cell-freezing container and keep it at –80 °overnight (TROUBLESHOOTING 3)2 J! E6 [3 E( V k: ?8 t
PAUSE POINT
4 k+ o/ w1 D+ u) @5 mFor long-term storage, keep frozen cells in the gas phase of a liquid nitrogen tank., X" s7 {; F# ?0 i3 t7 @
|
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
|