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Obtaining and characterization of a recombinant LipL32 protein for detection of leptospirosis
A Zhylkibayev1, Z Akishev1, B Khassenov1
1National Center for Biotechnology, 13/5 Korgalzhyn Road, Astana, Kazakhstan, 010000.
Abstract:
Leptospirosis is a disease which affects domestic and wild animals as well as humans. A highly conserved outer membrane lipoprotein LipL32 is considered to be an important antigen for detection of leptospirosis. In this study the recombinant protein LipL32 was extracted and characterized by immunochemical methods. The recombinant protein LipL32 was produced in Escherichia coli. We have optimized a LipL32 gene for expression in Rosetta (DE3) strain. 0.5% sodium lauryl sulfate was used to solubilize the protein and expressed into inclusion bodies. Immunochemical studies demonstrated a high reactivity of the recombinant LipL32 with antibodies elicited during infection of pathogenic Leptospira serovars. This study tested the diagnostic performance of the recombinant LipL32 in an in-house ELISA. The indirect ELISA was developed and its specificity was compared to that of a traditional microagglutination test (MAT).
Insights
This study produced a recombinant LipL32 protein for leptospirosis detection. The protein showed high reactivity, indicating its potential for developing new diagnostic tools for leptospirosis.
Area of Science:
- Microbiology
- Immunology
- Veterinary Medicine
Background:
- Leptospirosis is a zoonotic disease affecting humans and animals.
- The LipL32 outer membrane lipoprotein is a key antigen for leptospirosis diagnosis.
Purpose of the Study:
- To produce and characterize recombinant LipL32 protein.
- To evaluate the diagnostic performance of recombinant LipL32 in an in-house ELISA.
Main Methods:
- LipL32 gene optimization and expression in Escherichia coli (Rosetta (DE3) strain).
- Protein solubilization using sodium lauryl sulfate and isolation from inclusion bodies.
- Immunochemical characterization and development of an indirect ELISA.
Main Results:
- Recombinant LipL32 protein was successfully produced and purified.
- The recombinant protein demonstrated high reactivity with antibodies from pathogenic Leptospira infections.
- The in-house ELISA showed comparable specificity to the traditional microagglutination test (MAT).
Conclusions:
- Recombinant LipL32 is a promising antigen for leptospirosis diagnosis.
- The developed in-house ELISA using recombinant LipL32 is a viable diagnostic tool.
