Diagnostic evaluation of a synthetic peptide derived from a novel antigen B subunit as related to other available peptides and native antigens used for serology of cystic hydatidosis.

Dublin Core

Title

Diagnostic evaluation of a synthetic peptide derived from a novel antigen B subunit as related to other available peptides and native antigens used for serology of cystic hydatidosis.

Subject

HIDATIDOSIS
PEPTIDOS SINTETICOS
ANTIGENO B
QUISTE HIDATICO
BIBLIOGRAFIA NACIONAL QUIMICA
1998

Abstract

A synthetic peptide (GU4) derived from an antigen B (AgB) subunit was serologically compared with crude antigen (HCFA); immunopurified AgB and antigen 5 (Ag5), and two other synthetic peptides, for diagnosis of human cystic hydatidosis. GU4 was derived from the sequence of AgB/2, the novel AgB subunit described by us. The other two peptides: 65 (AgB mimotope) and 89-122 (Ag5 mimotope), were described by others. Antigens B and 5 showed higher diagnostic sensitivity than corresponding peptides. All sera reacting with peptides 89-122 and GU4 also reacted with 65. The latter provided three to four times higher sensitivity than the former two peptides, but 30% lower specificity. The diagnostic efficiency of AgB (82%) was higher than those of Ag5 (74%) and HCFA (71%). Interestingly, 89-122 only reacted with hydatid sera, some of which did not react with AgB. Considering positive those reacting with 89-122 or AgB, sensitivity increases from 77% (with AgB) to 82% (combined), while specificity is the same as with AgB (86%). Our results suggest that hydatid serology may be improved by: a) combining several defined antigens (including synthetic peptides), b) design of new E. granulosus-specific mimotopes, which react with the false negative sera (16/90; 18%).

Creator

Barbieri, M
Fernández, V
González Muzio, Gabriel Belmonte
Martínez, Víctor

Source

Parasite Immunology v. 20, 1998. -- p. 51-61

Publisher

Blackwell Science

Date

1998

Rights

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Format

PDF

Language

Inglés

Type

Artículo

Identifier

DOI: 10.1046/j.1365-3024.1998.00117.x

Document Item Type Metadata

Original Format

PDF
Date Added
August 3, 2015
Collection
Bibliografía Nacional Química
Item Type
Document
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Citation
Barbieri, M et al., “Diagnostic evaluation of a synthetic peptide derived from a novel antigen B subunit as related to other available peptides and native antigens used for serology of cystic hydatidosis.,” RIQUIM - Repositorio Institucional de la Facultad de Química - UdelaR, accessed November 17, 2025, https://riquim.fq.edu.uy/items/show/3328.