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Diseases of Aquatic Organisms

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DAO 117:197-204 (2016)  -  DOI:

Development of monoclonal antibodies against polar filaments and spore valves of Myxobolus honghuensis (Myxosporea: Bivalvulida)

Luo Jia1,2,3, Dan Li1,2,3, Zemao Gu1,2,3, Junfa Yuan1,2,3, Yanhua Zhai1,2,3,*

1Department of Aquatic Animal Medicine, College of Fisheries, Huazhong Agricultural University, Wuhan 430070, PR China
2Freshwater Aquaculture Collaborative Innovation Center of Hubei Province, Wuhan 430070, PR China
3Key Lab of Freshwater Animal Breeding, Ministry of Agriculture, Wuhan 430070, PR China
*Corresponding author:

ABSTRACT: Myxobolus honghuensis infects the pharynx of allogynogenetic gibel carp Carassius auratus gibelio (Bloch) and can cause high mortality. Only morphology-based diagnostic methods are currently available for clinical samples, but these methods are laborious and have low efficiency of detection. To overcome this problem, we designed a more sensitive diagnostic method. Two monoclonal antibodies (MAbs 1C7 and 3B7) were prepared by immunizing mice with soluble protein from sonicated M. honghuensis spores. Immunofluorescence analysis revealed that MAb 1C7 specifically reacts with polar filaments from spores, whereas MAb 3B7 identified protein localized on the spore valves. The isotypes of MAb 1C7 and MAb 3B7 were IgM and IgG1, respectively. Results of Western blot analysis revealed that MAb 1C7 recognized 2 prominent protein bands with molecular weights of 130 and 180 kDa, while MAb 3B7 recognized a protein band of 28 kDa. Thus, in this study we have developed 2 MAbs that have the potential for efficient detection of M. honghuensis. Moreover, identification of MAb 1C7 and MAb 3B7 allows for further studies of the functions and biochemical composition of polar filament and spore surface antigens.

KEY WORDS: Parasite · Carassius auritus gibelio · Immunofluorescence · Diagnostic methods · Specificity

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Cite this article as: Jia L, Li D, Gu Z, Yuan J, Zhai Y (2016) Development of monoclonal antibodies against polar filaments and spore valves of Myxobolus honghuensis (Myxosporea: Bivalvulida). Dis Aquat Org 117:197-204.

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