How Tuberculosis Bacteria Use Host Fats to Survive
Author Information
Author(s): Daniel Jaiyanth, Hédia Maamar, Chirajyoti Sirakova, Tatiana D. Kolattukudy, Pappachan E. Kolattukudy
Primary Institution: Burnett School of Biomedical Sciences, College of Medicine, University of Central Florida, Orlando, Florida, United States of America
Hypothesis
Mtb inside lipid-loaded macrophages imports fatty acids derived from host TAG to accumulate TAG inside the bacterial cell.
Conclusion
The study shows that Mycobacterium tuberculosis utilizes fatty acids from host triacylglycerol to accumulate lipid droplets and develop a dormant-like state in macrophages.
Supporting Evidence
- Mtb inside lipid-loaded macrophages accumulates lipid droplets containing TAG.
- Deletion of the tgs1 gene in Mtb resulted in decreased TAG accumulation.
- Phenotypic tolerance to antibiotics increased in Mtb within hypoxic lipid-loaded macrophages.
Takeaway
The tuberculosis bacteria can use fats from our body to store energy and survive in a sleepy state inside our immune cells.
Methodology
Human macrophages were infected with Mtb and incubated under hypoxia to mimic the granuloma environment, followed by analysis of lipid accumulation and gene expression.
Limitations
The study primarily uses in vitro models which may not fully replicate in vivo conditions.
Statistical Information
P-Value
p<0.05
Statistical Significance
p<0.05
Digital Object Identifier (DOI)
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