产品组分及规格

背景

GFAP (Glial fibrillary acidic protein) is a member of the class III intermediate filament protein family. GFAP is heavily and specifically expressed in astrocytes and certain astroglia of the central nervous system, in satellite cells of peripheral ganglia, and in non-myelinating Schwann cells of peripheral nerves. In addition, neural stem cells strongly express GFAP. Antibodies to GFAP are very useful as markers of astrocytic cells. In addition, many types of brain tumor, presumably derived from astrocytic cells, heavily express GFAP. GFAP is also found in the lens epithelium, Kupffer cells of the liver, in some cells in salivary tumors and has been reported in erythrocytes. GFAP is used as a marker to distinguish astrocytes from other glial cells during development. Mutations in this gene cause Alexander disease, a rare disorder of astrocytes in the central nervous system. Alternative splicing of the GFAP gene results in multiple transcript variants encoding distinct isoforms.

石蜡包埋组织的免疫组织化学方案

1. 脱蜡水化

石蜡切片置于新鲜二甲苯中浸泡脱蜡3次，每次15 min；依次置于不同浓度（100%、95%、90%、80%、70%）乙醇浸泡各5 min，再置于蒸馏水洗涤5 min，重复3次。

2. 抗原修复

沸水浴修复：将100×抗原修复缓冲液（试剂2）用蒸馏水稀释成1×抗原修复缓冲液，放入修复盒中并提前加热至95-100℃（注意盖好以防液体蒸发），然后将切片放入修复盒中，在沸水浴环境中保持外沸状态15 min，室温自然冷却；用PBS缓冲液（试剂1，将干粉溶解在2L蒸馏水中）清洗5 min，重复3次。

3. 阻断内源性过氧化物酶

用吸水纸吸去玻片上多余的液体，用免疫组化笔在组织周围画圈，加入2-4滴内源性过氧化物酶阻断剂（试剂3），室温下置于湿盒中孵育15 min，用PBS洗涤5 min，重复3次。

4. 血清封闭

用吸水纸吸去玻片上多余的液体，加入2-4滴封闭工作液（试剂4），置于湿盒内37℃封闭20 min，以减少非特异性染色。

5. 一抗孵育

用吸水纸吸去玻片上多余的液体，加入2-4滴大鼠GFAP兔多抗工作液（试剂5），置于湿盒中，4℃孵育过夜或37℃孵育1-2 h。

6. 复