Vdovenko Marina M, Ciana Leopoldo Della, Sakharov Ivan Yu
Department of Chemical Enzymology, Faculty of Chemistry, M.V. Lomonosov Moscow State University, 119991 Moscow, Russia.
Anal Biochem. 2009 Sep 1;392(1):54-8. doi: 10.1016/j.ab.2009.05.031. Epub 2009 Jun 3.
3-(10'-Phenothiazinyl)propane-1-sulfonate (SPTZ) was shown to be a potent enhancer of soybean peroxidase (SbP)-induced chemiluminescence. To the best of our knowledge, SPTZ is the first enhancer of SbP to be discovered. Optimal conditions for SbP-catalyzed oxidation of luminol in the presence of SPTZ were determined. The SbP-SPTZ system showed better sensitivity and a lower detection limit (LDL) with respect to the horseradish peroxidase-4-iodophenol system traditionally used in chemiluminescent enzyme-linked immunosorbent assay (ELISA). The addition of 4-morpholinopyridine (MORP) to the SbP-SPTZ system improved its analytical parameters by decreasing the LDL of SbP to 0.03pM. These results open up very promising perspectives for using the SbP-SPTZ-MORP system in ultrasensitive immunoassay.
3-(10'-吩噻嗪基)丙烷-1-磺酸盐(SPTZ)被证明是大豆过氧化物酶(SbP)诱导化学发光的有效增强剂。据我们所知,SPTZ是首个被发现的SbP增强剂。确定了在SPTZ存在下SbP催化鲁米诺氧化的最佳条件。与传统用于化学发光酶联免疫吸附测定(ELISA)的辣根过氧化物酶-4-碘苯酚系统相比,SbP-SPTZ系统显示出更好的灵敏度和更低的检测限(LDL)。向SbP-SPTZ系统中添加4-吗啉吡啶(MORP),通过将SbP的LDL降至0.03pM,改善了其分析参数。这些结果为在超灵敏免疫测定中使用SbP-SPTZ-MORP系统开辟了非常有前景的前景。