Characterization of a muscle-associated antigen from Wuchereria bancrofti

Thomas Jefferson University, Filadelfia, Pennsylvania, United States
Experimental Parasitology (Impact Factor: 1.64). 01/1993; 75(4):379-89. DOI: 10.1016/0014-4894(92)90251-5
Source: PubMed


A recombinant clone, WbN1, isolated from a genomic expression library of Wuchereria bancrofti and showing restricted specificity at the DNA level (Southern and PCR analyses) for Wuchereria bancrofti and Brugia malayi has been previously described. Sequence analysis of WbN1 indicated that it had notable similarity to myosin. Further characterization using in situ hybridization has localized the mRNA in the muscle of the adult parasite and in the microfilariae. Rabbit polyclonal antiserum, raised against the recombinant WbN1 fused to the maltose-binding protein, recognized a 200-kDa polypeptide in immunoblots containing B. malayi antigen extracts. The same antibody also recognized myosin extracted from Brugia pahangi, Onchocerca volvulus, and Caenorhabditis elegans. Localization using the rabbit antiserum revealed the presence of the antigen in the adult muscle tissue and in the microfilariae; the same antibody inhibited the binding of a monoclonal antibody 28.2 (directed toward MHC B of C. elegans myosin) to the recombinant WbN1 antigen and also to purified C. elegans myosin. Based on homology data, structural location, competitive ELISA, and immunoblot we conclude that WbN1 is related to myosin or a similar myofibrillar protein.

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    • "This opens the possibility of evaluating myosin for diagnosis , for protection and as a drug target. Detection of myosin has been used for diagnostic purposes in other parasitic infections (Raghavan et al., 1992) and in cardiovascular disease (Katoh et al., 1995). Also, tapeworm infections in humans induce antibody production (Wilkins et al., 1999), so T. solium myosin could be used to improve immunodiagnosis. "
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