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[Mycobacterium leprae: behavior in the adipocyte undergoing differentiation]
1INSERM U.322, Marseille, France.
Summary
Leprosy bacteria (Mycobacterium leprae) multiplication was observed in differentiating mouse fat cells in a 3D culture system. This suggests that fat cell differentiation may support M. leprae growth.
Area of Science:
- Microbiology
- Cell Biology
- Dermatology
Context:
- Investigates the behavior of Mycobacterium leprae (M. leprae) within murine preadipocyte cells (clone Ob17).
- Focuses on the in vitro adipose cell conversion process.
- Examines M. leprae interaction with differentiating fat cells.
Purpose:
- To determine if M. leprae can multiply in differentiating adipocytes.
- To assess the effect of adipose cell differentiation on bacterial viability and morphology.
- To explore a suitable in vitro model for studying M. leprae.
Summary:
- In vitro infection of differentiating Ob17 cells with M. leprae showed an increased morphological index (MI) of bacteria, suppressed by rifampicin.
- Monolayer cultures led to cell loss, preventing bacterial proliferation.
- A 3D culture system, mimicking the human dermis, enabled M. leprae increase in both MI and bacterial numbers within adipocytes and fibroblasts.
Impact:
- Suggests that cellular functions during adipose differentiation may complement the M. leprae genome.
- Indicates potential for transient bacterial multiplication in vitro.
- Highlights the utility of 3D dermal models for leprosy research.