摘要目的 比较4种抗原修复法对视网膜组织抗原修复的效果.方法 分别应用胰蛋白酶消化、高压加热、水浴加热和微波法对视网膜组织切片进行抗原修复,比较400例胞内视黄醛结合蛋白(CRALBP)、视紫红质和视蛋白免疫组织化学染色效果.结果 4种方法对3种蛋白的阳性表达无影响(P＞0.05),但在组织完整性和背景染色方面差异有统计学意义(P＜0.01).胰蛋白酶消化法效果稳定,抗原表达强,背景清晰,组织完整.而高压加热、水浴加热和微波修复导致组织脱失皱褶、细胞核龟裂,且背景染色强.结论 在视网膜组织病理学检测中,胰蛋白酶消化法是较理想的抗原修复方法.

abstractsBackground Antigen retrieval method is the key of improving the successful rate of immunohistochemical assay in paraffin sections.To study an available method of antigen retrieval is a goal to achieve both good immunochemistry result and preserving retinal proteins.ObjectiveThe aim of present study is to investigate tyrosin digestion,high-temperature heat pressure,water bath heating and microwave repair in antigen retrieval for retinal tissues.MethodsRetinal tissue was isolated and obtained from clean Chinchilla rabbits.Four hundreds retinal paraffin sections were prepared.Four kinds of antigen retrieval methods for retinal tissue including tyrosin digestion,high-temperature heat pressure,water bath heating and microwave repair were used respectively.The depigmentated retinal paraffin section without antigen retrieval was used as control.The positive rates of expression of CRALBP,Rhodopsin and opsin proteins were evaluated and compared among four kinds of antigen retrieval methods by immunochemistry.ResultsCRALBP,Rhodopsin and opsin protein was positively expressed in cytoplasm of retinal pigment epithelial cells and the outer segment of photoreceptor respectively.No significant difference was found in the positive expression rates of these three proteins among four kinds of antigen retrieval methods (P＞0.05),but the differences in tissue integrity and background staining were statistically significant (P＜0.01).The structural damage of retina included loss and pucker of scalera,crack of nucleus and abnormal background stain in high-temperature heat pressure method,water bath heating method and microwave retrieval method.However,stable CRALBP,Rhodopsin and opsin protein expression and strain effectiveness,clear background without unspecific staining and integrated tissue were seen in tyrosin digestion method.ConclusionDuring the clinical pathology analysis of retinal tissue,the application of tyrosin digestion in antigen retrieval could obtain a better effectiveness.