Diagnosis of tuberculosis infection based on synthetic peptides from Mycobacterium tuberculosis antigen 85 complex.

Abstract:

AIM:The laboratory diagnosis of pulmonary tuberculosis (TB) and tuberculous meningitis (TBM) is particularly challenging. The aim of the present work is to develop an immunoassay for the diagnosis of TB infection, using synthetic peptides of antigen (Ag) 85 complex of M. tuberculosis (Mtb) H37Rv. METHODS:Four peptides (7-10 amino acids long) corresponding to group-specific epitopes of Ag 85 complex of Mtb were synthesized. All peptides were evaluated by enzyme-linked immunosorbent assay (ELISA) for immunoreactivity with sera and CSF samples of TB and TBM patients respectively. The diagnostic value of the four peptides was evaluated in both the samples. RESULTS:It was observed that Ag 85 peptide 1, 3 and 4 had the highest positive rates in the pulmonary patients; however, Ag 85 peptide 1 and 2 had shown good positivity in the TBM subjects. CONCLUSIONS:The synthetic peptide based ELISA using Ag 85 complex peptides is a sensitive, specific, rapid and cost effective immunoassay for early diagnosis of pulmonary and extrapulmonary TB. In addition, these synthetic peptides are comparatively easy to produce in a reproducible manner compared with the whole antigen.

journal_name

Clin Neurol Neurosurg

authors

Kashyap RS,Shekhawat SD,Nayak AR,Purohit HJ,Taori GM,Daginawala HF

doi

10.1016/j.clineuro.2012.07.031

subject

Has Abstract

pub_date

2013-06-01 00:00:00

pages

678-83

issue

6

eissn

0303-8467

issn

1872-6968

pii

S0303-8467(12)00423-4

journal_volume

115

pub_type

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