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为测定内皮素－１（Ｅｎｄｏｔｈｅｌｉｎ－１，ＥＴ－１）及其激动剂Ｓ６ｂ（ｓａｒａｆｏｔｏｘｉｎ）、拮抗剂ＢＱ１２３对兔眼睫状体组织环磷酸腺苷（ｃｙｃｌｉｃａ－ｄｅｎｏｓｉｎｅ－ｍｏｎｏｐｈｏｓｈａｔｅ，ｃＡＭＰ）的影响，运用内源性蛋白结合法测定兔睫状体组织ｃＡＭＰ的含量。结果：单独使用ＥＴ－１、Ｓ６ｂ以及两者联合应用均使睫状体ｃＡＭＰ升高，且呈剂量效应关系；单独应用ＢＱ１２３未引起ｃＡＭＰ改变，但ＥＴ－１与ＢＱ１２３共同作用，可有效地拮抗ＥＴ－１的升高ｃＡＭＰ效应。结论：ＥＴ－１可使兔睫状体组织ｃＡＭＰ升高；兔眼睫状体上有ＥＴＡ亚型受体。
To determine the effect of Endothelin-1 (ET-1) and its agonist S6b (sarafotoxin) and antagonist BQ123 on cyclic a-denosine-monophosphate (cAMP) The content of cAMP in rabbit ciliary body tissue was determined by endogenous protein binding method. Results: ET-1 alone, S6b alone and combined use of corticosteroid and corticosteroid increased the cAMP of ciliary body in a dose-dependent manner. BQ123 alone did not induce cAMP change, but ET-1 and BQ123 could effectively antagonize cAMP ET-1 increased cAMP effect. CONCLUSION: ET-1 can increase cAMP in ciliary body of rabbits. There is ETA subtype receptor in rabbit ciliary body.