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XB-ART-42838
Parasitol Res 2011 Sep 01;1093:567-74. doi: 10.1007/s00436-011-2285-8.
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Molecular cloning, characterization, and immunolocalization of two lactate dehydrogenase homologous genes from Taenia solium.

Du W , Hu F , Yang Y , Hu D , Hu X , Yu X , Xu J , Dai J , Liao X , Huang J .


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Two novel genes encoding lactate dehydrogenase A (LDHA) and B (LDHB) homologues, respectively, were identified from the cDNA libraries of adult Taenia solium (T. solium). The two deduced amino acid sequences both show more than 50% identity to the homologues for Danio rerio, Xenopus laevis, Schistosoma japonicum, Sus scrofa, Homo sapiens, et al. The identity of the amino acid sequence between TsLDHA and TsLDHB is 57.4%, and that of the nucleotide sequence is 61.5%. Recombinant TsLDHA homologue (rTsLDHA) and TsLDHB homologue (rTsLDHB) were expressed in Escherichia coli BL21/DE3 and purified. Though there were some differences in the sequence, the two LDH isozyme homologues show similarity in the conserved LDH domain, topological structure, primary immunological traits, localization on the tegument of T. solium adult, and partial physicochemical properties. The linear B-cell epitope analysis of TsLDHA and TsLDHB discovered a TsLDHA specific epitope. The purified rTsLDHA and rTsLDHB could be recognized by rat immuno-sera, serum from swine, or a patient infected with T. solium, respectively, but Western blot analysis showed cross-reactions, not only between these two LDH members but also with other common human tapeworms or helminths. The results suggested that the two LDH homologues are similar in the characteristics of LDH family, and they are not specific antigens for immunodiagnosis.

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References [+] :
Aguilar-Díaz, The genome project of Taenia solium. 2006, Pubmed