Peptides, methods for assaying human pepsinogen I or human pepsin I and assay kits
申请人:——
公开号:US20020099019A1
公开(公告)日:2002-07-25
Peptides of the formula (I)
R-X-ProlleGlu-W-Y-Z (I)
(wherein R is hydrogen, an amino-protective group, residue carrying one or two D- or L-amino acid, X is Lys or Arg, W is Phe orPhe(NO
2
) (in which Phe(NO
2
) is p-nitrophenylalanine.), Y is Phe, Phe(NO
2
), Tyr, 3,5-diiodotyrosine, norleucine, Leu, Asp(OBzl) or Met (in which OBzl is benzyloxy.), Z is an aniline, aminocoumarin or aminonaphthalene derivative residue.), or acid addition salts thereof.
Peptides of the formula (I) are specific substrates for human pepsin I, so they are used in assaying human pepsin I or human pepsinogen I. These peptide are useful in the diagnosis of gastric diseases such as gastric cancer and gastric ulcer.
公式(I)的肽(R-X-ProlleGlu-W-Y-Z) (其中R是氢,氨基保护基,残基携带一个或两个D-或L-氨基酸,X是Lys或Arg,W是Phe或Phe(NO2)(其中Phe(NO2)是对硝基苯丙氨酸。),Y是Phe,Phe(NO2),Tyr,3,5-二碘酪氨酸,norleucine,Leu,Asp(OBzl)或Met(其中OBzl是苄氧基),Z是苯胺,氨基香豆素或氨基萘衍生物残基),或其酸加成盐。公式(I)的肽是人胃蛋白酶I的特异性底物,因此它们用于检测人胃蛋白酶I或人胃蛋白酶原I。这些肽对于诊断胃癌和胃溃疡等胃病非常有用。