Related Experiment Videos
Study the presence of fibronectin binding protein (FnBp) in tuberculosis (TB) patients by elisa
A Ahmad1, S Afghan, C Raykundalia
1Department of Microbiology, University of Karachi, Pakistan.
Abstract:
Fibronectin-binding protein (FnBp) antigens are a prominent secretory protein of short term culture supernatants of M. tuberculosis and M. bovis (BCG) and is conserved within the genus Mycobacterium. The 30/31 kDa antigen of M. tuberculosis is one of the major secretory molecules and is probably routinely recognised by the host immune system in the early stage of tuberculosis infection. Serum immune complexes, prepared from TB patients and normals, were analysed for the presence of FnBp by ELISA using an anti-30/31 kDa (FnBp) monoclonal antibody (CF8) and by western blotting using Fibronectin-HRP. A significant difference was seen between normals and TB patients (p < 0.05). This test was found to have a specificity of 80% and a positive predictive value of 73%. This is a preliminary finding and the test needs to be evaluated further for its performance on a larger number of confirmed TB patients and controls.
Insights
A novel test detects fibronectin-binding protein (FnBp) in serum immune complexes, showing promise for early tuberculosis (TB) diagnosis. This early detection method requires further validation in larger patient groups.
Area of Science:
- Immunology
- Microbiology
- Diagnostic Development
Background:
- Fibronectin-binding protein (FnBp) is a key secretory antigen of Mycobacterium tuberculosis and M. bovis (BCG).
- The 30/31 kDa FnBp is a major secretory molecule recognized by the host immune system during early tuberculosis infection.
Purpose of the Study:
- To investigate the presence of FnBp in serum immune complexes from tuberculosis (TB) patients and healthy individuals.
- To evaluate the diagnostic potential of FnBp detection for early TB identification.
Main Methods:
- Analysis of serum immune complexes from TB patients and normal controls.
- Enzyme-linked immunosorbent assay (ELISA) using anti-30/31 kDa (FnBp) monoclonal antibody (CF8).
- Western blotting with Fibronectin-HRP.
Main Results:
- A significant difference in FnBp detection was observed between TB patients and normal individuals (p < 0.05).
- The developed test demonstrated 80% specificity and 73% positive predictive value.
- Preliminary findings suggest FnBp detection as a potential biomarker for TB.
Conclusions:
- Fibronectin-binding protein (FnBp) is detectable in serum immune complexes of TB patients.
- The FnBp detection assay shows potential as an early diagnostic tool for tuberculosis.
- Further evaluation on larger cohorts of confirmed TB patients and controls is necessary.