催化信号放大法的改进

目的:探讨酪胺与过氧化物酶发生酶促反应后,用热缓冲液洗以进一步提高和改善催化信号放大法(CSA)的敏感性和特异性.方法:应用7种不同类型的一抗,2张不同肿瘤的组织芯片,同时进行EnVision法、LsAB法、标准CSA法和改进CSA法染色,比较敏感性和特异性.结果:改进CSA法最为敏感,其次是标准CSA法、EnVision法和LsAB法,改进CSA法的敏感性较标准CSA法高2～3倍.4种方法背景染色基本一致,细胞定位准确.结论:改进后的CSA法的稳定性、敏感性好于标准CSA法.

Modification of catalyzed signal amplification method

Objective:To verify whether hot PBS washing after the enzymatic reaction between tyramine and horseradish peroxidase can improve the sensitivity and specificity of catalyzed signal amplification (CSA). Methods: Using 7 different types of primary antibodies and 2 tumor microarray system, we carried out EnVision, LSAB, Standard CSA, and modified CSA staining and compared their sensitivities and specificities. Results: The modified CSA method was the most sensitive one among the 4 methods, followed by standard CSA, EnVision, and LsAB method. The sensitivity of modified CSA method was 2-3 times higher than that of standard CSA. The 4 methods had similar background staining and had exact localization of cells. Conclusion: The modified CSA is more stable and sensitive than traditional CSA staining method.