Schistosoma: A 200-kDa chemotherapeutic target antigen is differentially localized in african vs oriental species

Traci M. Tanaka, Amy P Skubitz, Mette Strand

Research output: Contribution to journalArticle

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Abstract

A 200-kDa protein of the African schistosome Schistosoma mansoni has been identified as a target of antibodies that act in synergy with praziquantel. Treatment of worms with praziquantel exposes selective epitopes of the 200-kDa protein on the surface of S. mansoni and transfer of a monoclonal antibody recognizing the 200-kDa protein at the time of drug treatment restores the effectiveness of praziquantel against infections in B-cell-depleted mice. In the present study, a cross-reactive 200-kDa protein was identified in the three major schistosome species by Western blot analysis using a polyclonal rabbit antiserum recognizing the 200-kDa protein from S. mansoni. Surprisingly, three monoclonal antibodies generated against immunogenic epitopes of the 200-kDa protein did not recognize the 200-kDa protein of the Oriental species Schistosoma japonicum, although they did recognize the 200-kDa protein of another African species Schistosoma haematobium. Furthermore, in the case of S. japonicum, treatment with praziquantel did not expose the 200-kDa protein on the worm surface. Even acetone treatment, which makes surface epitopes more accessible, did not expose the 200-kDa protein on the surface of S. japonicum. In contrast, the 200-kDa protein of S. haematobium was exposed following treatment with praziquantel, and acetone fixation resulted in significantly increased reactivity of the rabbit a200-kDa antiserum with the surface of both S. mansoni and S. haematobium worms.

Original languageEnglish (US)
Article number71035
Pages (from-to)293-301
Number of pages9
JournalExperimental Parasitology
Volume76
Issue number3
DOIs
StatePublished - Jan 1 1993

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Schistosoma
Praziquantel
Antigens
Schistosoma japonicum
Schistosoma mansoni
Proteins
Schistosoma haematobium
Epitopes
Protein S
Acetone
Immune Sera
Membrane Proteins
Monoclonal Antibodies
Rabbits
B-Lymphocytes
Western Blotting
Antibodies
Infection
Pharmaceutical Preparations

Cite this

Schistosoma : A 200-kDa chemotherapeutic target antigen is differentially localized in african vs oriental species. / Tanaka, Traci M.; Skubitz, Amy P; Strand, Mette.

In: Experimental Parasitology, Vol. 76, No. 3, 71035, 01.01.1993, p. 293-301.

Research output: Contribution to journalArticle

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