Determination of Autophagic Activity Of J774a.1 Murine Macrophages Infected With Recombinant Mycobacterium Smegmatis
Tuberculosis (TB) remains a major worldwide health problem which causes more than 1.3 million deaths annually. The development of a new vaccine as a replacement of Bacille Calmette Guerin (BCG) or to improve its efficacy is one of the goals mooted by the World Health Organization (WHO) to control...
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| Main Authors: | , , , |
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| Format: | Conference or Workshop Item |
| Language: | English English |
| Published: |
2019
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| Subjects: | |
| Online Access: | http://eprints.unisza.edu.my/2514/1/FH03-FSK-19-32216.jpg http://eprints.unisza.edu.my/2514/2/FH03-FSK-19-32472.pdf http://eprints.unisza.edu.my/2514/ |
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| Institution: | Universiti Sultan Zainal Abidin |
| Language: | English English |
| Summary: | Tuberculosis (TB) remains a major worldwide health problem which causes more
than 1.3 million deaths annually. The development of a new vaccine as a
replacement of Bacille Calmette Guerin (BCG) or to improve its efficacy is one of the
goals mooted by the World Health Organization (WHO) to control TB.
Mycobacterium smegmatis (M. smegmatis) is nonpathogenic and commensal in
humans, which shares many characteristics with Mycobacterium tuberculosis (M.
tuberculosis). Mycobacterial vectors including M. smegmatis have been successfully
used in the development of experimental vaccines against TB. In the current study,
recombinant M. smegmatis expressing selected Ag85B epitopes (P1, P2 and P3)
was constructed (rMs064). Autophagy play important role in delivery of the
intracellular bacteria to simulate the adaptive immune response. Targeting the
autophagy mechanism is a viable approach to enhance the specific immune
response leading to the prevention of new infection or reactivation of latent TB.
Therefore, autophagy modulation of J774A.1 murine macrophages was determined
after infection with rMs064 by monitoring the LC3B-II level by flow cytometry and
western blot. This experiment allows the determination of autophagy modulation as
well as the autophagic flux induced by rMs064 on J774A.1 macrophages. The
results of both assays showed the LC3B-II level were not significantly increased
compared to uninfected macrophages. In conclusion, macrophage activation and
cytokine stimulation may be required for optimal autophagy monitoring assays that
can be modulated by rMs064. |
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