1921
Volume 72, Issue 2
  • ISSN: 0002-9637
  • E-ISSN: 1476-1645

Abstract

A recombinant protein, rLdccys1, which was produced by expression of the gene encoding a 30 kDa cysteine proteinase from , was used for detection of antibodies in sera from patients with active visceral leishmaniasis (VL) in enzyme-linked immunosorbent assays. Analysis of the predicted amino acid sequence of rLdccys1 showed that it contains all the characteristics of a cysteine proteinase. The ability of the protein to react with sera from humans with VL was also shown by Western blotting. The sensitivity for detection of specific antibodies to bodies using rLdccys1, promastigote lysates, and amastigote lysates was 80%, 98%, and 99%, respectively. No cross-reactivity between rLdccys1 and Chagas disease was observed, and there was little positive reactivity with sera from patients with cutaneous leishmaniasis and tuberculosis, compared with promastigote and amastigote extracts. Our findings indicate that rLdccys1 from constitutes a potential tool for the diagnosis of American VL.

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2005-02-01
2017-09-22
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  • Received : 04 Mar 2004
  • Accepted : 24 Apr 2004

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