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Electrochemiluminescence Assays for Human Islet Autoantibodies
Published on: March 23, 2018
Antibodies specific to isoniazid and isonicotinic acid
Journal of Immunology (Baltimore, Md. : 1950)
|April 1, 1976
Summary
Researchers developed specific antibody tests for isoniazid (INH) and its metabolite isonicotinic acid (INA). These antibodies effectively detect INH, isonicotinamide (INC), and INA, aiding in drug monitoring and metabolism studies.
Area of Science:
- Immunology
- Pharmacology
- Analytical Chemistry
Background:
- Isoniazid (INH) is a crucial first-line antituberculosis drug.
- Monitoring INH and its metabolites is essential for therapeutic efficacy and safety.
- Developing specific immunoassays requires well-characterized antibodies against INH and its metabolites.
Purpose of the Study:
- To generate and characterize rabbit antisera specific for isoniazid (INH) and isonicotinic acid (INA).
- To investigate the cross-reactivity of generated antibodies with related compounds, including isonicotinamide (INC).
- To establish the relative binding affinities of INH, INC, and INA to anti-INH and anti-INA antibodies.
Main Methods:
- Preparation of INH and INA conjugates with human serum albumin for immunization.
- Generation of rabbit antisera against the hapten-carrier conjugates.
- Hapten-specific purification of antibodies using immunosorbents.
- Quantitative precipitin and immunodiffusion assays to assess antibody-hapten interactions.
- Inhibition assays to determine relative binding affinities.
Main Results:
- Rabbit antisera specific for INH and INA were successfully generated.
- The antibodies demonstrated reactivity with INH, INA, and INC, all sharing the isonicotinyl group.
- Relative inhibition potency indicated a binding order of INH > INC > INA for both anti-INH and anti-INA antibodies.
Conclusions:
- Specific antibodies against isoniazid and isonicotinic acid can be reliably produced.
- These antibodies exhibit cross-reactivity within the isonicotinyl chemical group, with varying affinities.
- The characterized antibodies are suitable for developing immunoassays for detecting INH and its related metabolites.
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