Double-antigen sandwich ELISA for detecting Aspergillus fumigatus anti-Afmp1cr and Afmp2cr antibodies
YANG Mei
WANG Zhuoya
HAO Wei
WANG Yanfang
HUANG Li
CAI Jianpiao
JIANG Lingxiao
CHE Xiaoyan
ZHONG Xiaozhu
YU Nan
Abstract：Objective To establish two double-antigen sandwich ELISA systems to detect anti-Afmp1cr and Afmp2cr antibodies of Aspergillus fumigatus. Methods Recombinant Afmp1cr and Afmp2cr proteins of A.fumigatus expressed in Pichia pastoris were obtained. Double-antigen sandwich ELISA systems for detecting specific anti-Afmp1cr and anti-Afmp2cr antibodies were developed after chessboard titrating to determine the appropriate concentrations of the recombinant proteins and HRP-labeled proteins. The sensitivity of the assay was evaluated using serum samples of rabbits immunized with Afmp1cr and Afmp2cr. The specificity of the assay was evaluated by detecting serum samples from healthy donors and patients with other pathogenic fungal and baterial infections. The performance of the two ELISA kits was furthered evaluated using serum samples from patients with suspected Aspergillus infection. Results The established ELISA kits were capable of detecting anti-Afmp1cr and anti-Afmp2cr antibodies in immunized rabbit serum at the maximum dilutions of 800 and 3200, respectively. No cross-reactivity was observed in detecting serum from patients with other pathogenic fungal or bactetial infections. Both of the two kits yielded positive results in sera from two established Aspergillus-infected cases and a suspected case. Conclusion Two antibody-capture ELISA kits were developed for the laboratory diagnosis of A.fumigatus infection and can be potentially useful in the clinical diagnosis of Aspergillosis infections.
Keywords：Aspergillus fumigatusdouble- antigen sandwich enzyme- linked immunosorbent assayantibody detectionAfmp1pAfmp1crAfmp2cr
Publication Date：2014-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：5( 646-650 )