Major proteins of mycobacterial strain ICRC and Mycobacterium leprae, identified by antibodies in sera from leprosy patients and their contacts

Author:

Chiplunkar S V1,Kudalkar J L1,Butlin R1,Samson P D1,Deo M G1,Gangal S G1

Affiliation:

1. Immunology Division, Cancer Research Institute, Parel, Bombay, India.

Abstract

Sera from leprosy patients across the clinical spectrum, healthy contacts, tuberculosis patients, and healthy donors were tested for their reactivity with antigens of mycobacterial strain ICRC (a cultivable mycobacterium) and Mycobacterium leprae by immunoprecipitation technique. Using M. leprae antigens, it was not possible to distinguish between reactivities of sera from lepromatous, borderline lepromatous, borderline tuberculoid, and tuberculoid leprosy patients. All these sera identified M. antigens with molecular masses of 47, 36, 21, and 14 kDa. When the same sera were tested for their reactivities with antigens of mycobacterial strain ICRC, several differences were observed. The 21-kDa antigen of mycobacterial strain ICRC was exclusively precipitated by sera from all lepromatous leprosy patients and from those undergoing erythema nodosum leprosum reaction. Sera from all the other donors tested failed to identify the 21-kDa antigen of mycobacterial strain ICRC. The 14-kDa protein of mycobacterial strain ICRC was identified by sera from a few lepromatous leprosy patients (5 of 26) and all their contacts. Our studies indicate that antigens present on cultivable mycobacteria rather than species-specific antigens may prove to be useful in the serodiagnosis of leprosy.

Publisher

American Society for Microbiology

Subject

Microbiology (medical)

Reference23 articles.

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2. Improved silver staining of plant proteins, RNA and DNA in polyacrylamide gels;Blum H.;Electrophoresis,1987

3. Antigens of Mycobacterium leprae identified by immunoprecipitation with sera from leprosy and tuberculosis patients;Britton W. J.;Clin. Exp. Immunol.,1988

4. SDS-PAGE analysis of M. leprae protein antigens reacting with antibodies from sera from lepromatous patients and infected armadillos;Chakrabarty A. K.;Clin. Exp. Immunol.,1982

5. Antigenic profile of ICRC bacilli with special reference to isolation of immunogenic subunit;Chirmule N. B.;Int. Arch. Allergy Appl. Immunol.,1988

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