Mapping of the putative epitope domain of Clonorchis sinensis paramyosin (CsPmy) recognized by CsPmy-specific immunoglobulin G in sera of human clonorchiasis

Title
Mapping of the putative epitope domain of Clonorchis sinensis paramyosin (CsPmy) recognized by CsPmy-specific immunoglobulin G in sera of human clonorchiasis
Authors
김동수
Keywords
Clonorchis sinensis, Paramyosin, IgG binding epitope, Serodiagnostic antigen, Clonorchiasis
Issue Date
2015-06
Publisher
MOLECULAR AND BIOCHEMICAL PARASITOLOGY
Series/Report no.
MOLECULAR AND BIOCHEMICAL PARASITOLOGY ; Vol201 no.1 Startpage 66 Endpage 71
Abstract
Paramyosin of Clonorchis sinensis (CsPmy) is a myofibrillar protein localized in subtegumental muscle, tegument, and the muscle layer surrounding the intestine of the parasite. Previously, we have identified that CsPmy reacted with sera of human clonorchiasis and this protein had a potential as a candidate antigen for serodiagnosis of clonorchiasis. However, we also found that CsPmy is able to bind to human immunoglobulin G (IgG) in non-specific manners, which can affect the diagnostic value of the protein. Here, we mapped CsPmy-specific IgG binding site on CsPmy to analyze the putative epitopes recognized by CsPmy-specific IgG in sera of human clonorchiasis. The fragmental expression of CsPmy followed by immunoblot analyses with sera from patients with clonorchiasis and non-specific human IgG revealed that the middle portion of CsPmy (CsPmyC: 301–600 amino acid residues) had epitopes responsible for CsPmy-specific IgG recognition. The precise CsPmy-specific IgG binding site was further narrowed down to a fragment (CsPmyC-2), which harbors 151 amino acid residues (375–525) of CsPmy. Specific antibodies for CsPmyC-2 were produced in rats after two-weeks of post-experimental infection. The CsPmyC-2 showed low levels of cross reactivity against the sera from patients with other helminth parasites. Our results suggested that CsPmyC-2 has real epitopes recognized by CsPmy-specific IgG in sera of human clonorchiasis and the fragment can be useful as a reliable serodiagnostic antigen to develop a serodiagnostic method for clonorchiasis.
URI
https://www.sciencedirect.com/science/article/pii/S0166685115300104
http://dspace.inha.ac.kr/handle/10505/55177
ISSN
0166-6851
Appears in Collections:
Medical School/College of Medicine (의학전문대학원/의과대학) > Medical Science (의학) > Journal Papers, Reports(의학 논문, 보고서)
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