Abstract
A cDNA library based on mRNA from oncospheres of Echinococcus multilocularis was constructed and screened with an oncosphere-specific rabbit serum. cDNA sequences of three clones that were isolated out of this library are discussed: one codes for a serpin-like proteinase inhibitor, the first isolated from cestodes. Two other clones code for dominant oncosphere antigens and represent homologues of known genes: one is known from several taeniid cestodes as a protective antigen containing fibronectin III domains, the second is related to genes of small heat shock proteins. It contains an internal duplication that might be specific for platyhelminths.
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Acknowledgements
We gratefully acknowledge the help of D. Kersten and H. Stöppler (Aulendorf) and U. Eskens (Gießen), as well as their assistants in collecting fox intestines. Many thanks to B. Bilger and V. Müller-Schollenberger for their help in the inspection of this material and for providing anti-metacestode serum and the GAPDH probe; to B. Kübler for technical assistance, to U. Schneider (Aachen) for financial support, to S. Meuer and A. Ruppel (Heidelberg) for disposition of infrastructure for DNA sequencing and completion of this manuscript. We thank G. Roger, A. Ruppel and U. Vettel for critically reading the manuscript. The project was supported by a DFG-grant to R. Lucius (Lu 325/4-5); by U. Schneider (Orthopädische Universitätsklinik Aachen) and by the Arbeitsamt Mannheim. The experiments described in this publication have been done in compliance with German legislation. The DNA sequences discussed in this paper have been submitted to the EMBL data bank under the following accession numbers: aj420235—ONCO1, aj420236—ONCO2, aj420237—SERP; the corresponding derived amino acid sequences are available in the SPTREMBL data base under the respective accession numbers: q8wpi6, q8wt42, q8wt41.
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Merckelbach, A., Wager, M. & Lucius, R. Analysis of cDNAs coding for immunologically dominant antigens from an oncosphere-specific cDNA library of Echinococcus multilocularis . Parasitol Res 90, 493–501 (2003). https://doi.org/10.1007/s00436-003-0888-4
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DOI: https://doi.org/10.1007/s00436-003-0888-4