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Characterization of a recombinant immunodiagnostic antigen (NIE) from Strongyloides stercoralis L3-stage larvae

IR@IGIB: CSIR-Institute of Genomics & Integrative Biology, New Delhi

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Title Characterization of a recombinant immunodiagnostic antigen (NIE) from Strongyloides stercoralis L3-stage larvae
 
Creator Ravi, Varatharajalu
Ramachandran, Srinivasan
Thompson, Robert W
Andersen, John F
Neva, Franklin A
 
Subject Q Science (General)
 
Description Due to the process of internal autoinfection, even chronic asymptomatic infections with Strongyloides stercoralis have the potential to become severe disseminated disease with fatal outcome. Intermittent and scanty larval excretion makes parasitologic diagnosis difficult. Serodiagnosis is helpful, but antigen preparation from infective larvae requires access to patients or immunosuppressed experimental animals. For these reasons, attention has turned to recombinant antigens for immunodiagnosis. A 31-kDa candidate antigen (NIE) derived from an L3 cDNA library is described in this report. Multiple alignment of the deduced amino acid sequence of NIE showed approximately 12–18% identity with various other organisms, including 17.9% of Asp1 of Ancylostoma caninum, 12.6% of Hemonchus contortus, and 17.6% of insect venom allergen 5 of yellow jacket. By ELISA, antibodies to the purified recombinant NIE antigen were demonstrated in 87.5% of 48 sera from strongyloides-infected patients and in only 6.5% of sera from presumed normal controls. Immunoreactivity of purified NIE antigen with parasite-specific IgE from sera of strongyloides-infected patients indicated its potential use as an immediate sensitivity skin test antigen. This application of the NIE antigen was supported by its capacity to trigger release of histamine upon in vitro exposure to blood from strongyloides-infected patients and its failure to produce histamine release from blood of normal controls.
 
Date 2002-10-02
 
Type Article
PeerReviewed
 
Format application/pdf
 
Identifier http://openaccess.igib.res.in/69/1/142.pdf
Ravi, Varatharajalu and Ramachandran, Srinivasan and Thompson, Robert W and Andersen, John F and Neva, Franklin A (2002) Characterization of a recombinant immunodiagnostic antigen (NIE) from Strongyloides stercoralis L3-stage larvae. Molecular and Biochemical Parasitology, 125 (1-2). 73 - 81.
 
Relation http://www.sciencedirect.com/science/article/pii/S0166685102002141
http://openaccess.igib.res.in/69/