细胞免疫荧光实验步骤
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细胞爬片免疫荧光实验步骤
第一天:
1. 在培养板中将已爬好细胞的玻片用PBS浸洗3次,每次3min;
2. 用4%的多聚甲醛固定爬片15min, PBS浸洗玻片3次,每次3min;
3. 0.5%Triton X-100( PBS配制 )室温通透20min(细胞膜上表达的抗原省略此步骤);
4. PBS浸洗玻片3次,每次3 min,吸水纸吸干PBS,在玻片上滴加正常山羊血清,室温封闭30min;
5. 吸水纸吸掉封闭液,不洗,每张玻片滴加足够量的稀释好的一抗并放入湿盒,4℃孵育过夜;
第二天:
6. 加荧光二抗: PBST 浸洗爬片3次,每次3min,吸水纸吸干爬片上多余液体后滴加稀释好的荧光二抗,湿盒中20-37℃孵育1h,PBST浸洗切片3次,每次3min;注意:从加荧光二抗起,后面所有操作步骤都尽量在较暗处进行。
7. 复染核:滴加DAPI避光孵育5min,对标本进行染核,PBST 5min×4次洗去多余的DAPI;8. 用吸水纸吸干爬片上的液体,用含抗荧光淬灭剂的封片液封片,然后在荧光显微镜下观察采集图像。
细胞免疫荧光步骤
1.在24孔板里加500微升培养基,放爬片,接种细胞(做实验以30-50%汇合度较好。10000-30000左右
2.给药处理24h。
3.PBS洗三遍。
4. 4%冷的多聚甲醛固定15分钟,PBS洗三遍,每次5min,摇床。(避光)
5.0.5%Triton X-100(PBS配)破膜15min,PBS洗三遍,每次5min,摇床。
6.5%BSA(牛血清白蛋白,PBS配)封闭60分钟,不用洗。
7.加一抗孵育(5%BSA配),4℃摇床过夜。
8. 收集一抗,PBS洗三遍,每次5min,摇床。孵育二抗Alexa Fluor 488(1:1000 ),室温60min(避光)
9. 回收二抗,PBS洗三遍,摇床,每次5min。
10. 0.5ug/mLDAPI(5%BSA配,2滴/ml)染核15min。(避光)
11. PBS洗三遍,每次5min,摇床。
12.取载玻片,滴加10uL抗荧光衰减封片剂,将爬片有细胞面盖在封片剂上,指甲油封片子的对角线。
All steps for IF
1) Remove culture medium and fix cells (a common fixat ive is 4%
formaldehyde in PBS, for 15 minutes)
2) Wash well in PBS (3 x 5 minutes is typical)
3) Permeabilize the cells (a common permeabilization rea gent is 0.2% Triton X-100 in PBS for 30 minutes)
4) Wash well in PBS
5) (optional: Block for non-specific dye binding using the Image-iT FX Image Enhancer Solution, I36933)
6) Block for non-specific antibody binding 30-60 minutes
(a common blocking solution would be 3-6% bovine serum alb umin / 5% normal goat serum / PBS, or commercial blocking reagents like our BlockAid, product B10710)
7) Incubate in primary antibody for 30-60 minutes, in blocking solution or overnight at 4 degrees (antibody concent rations vary, but usually between 0.5-10ug/mL)
8) Wash well in PBS
9) Incubate in secondary antibody for 30-60 minutes, in 3-6% bovine serum albumin / PBS (a good starting antibod y concentration is 5 ug/mL) 10) Wash well in PBS
11) Counterstain as needed (such as with DAPI, D1306)
12) Mount in appropriate mounting medium (for fluorescent sec ondaries, a good antifade solution is best, such as ProLong Gold, P36934, or SlowFade Gold, S36937)
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