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Optimized Protocols for Mycobacterium leprae Strain Management: Frozen Stock Preservation and Maintenance in Athymic Nude Mice
Published on: March 23, 2014
[Electron microscopy of Mycobacterium leprae passed in laboratory animals]
1Research Institute of Leprosy, Astrakhan, Russia.
Abstract:
The ultrastructure of M. leprae was studied in the process of its intraplantar passage from man to mice (passages 1-8). Changes in the morphology of M. leprae, observed in the course of 3 passages, were established. From the phase of dormant forms (passage 1) the bacteria became adapted to the new host by passage 3, which was confirmed by the absence of differences in the ultrastructure of cells by passages 3-8. The possibilities of the phenotypic variability of M. leprae in the process of in vivo passage should be taken into consideration when they are used for the production of specific biopreparations, experimental modeling and the screening of antileprous preparations.
Insights
Mycobacterium leprae adapted to mice within three passages, showing stable ultrastructure from passage 3 onwards. This bacterial adaptation is crucial for leprosy research and drug development.
Area of Science:
- Microbiology
- Cell Biology
- Pathogen Adaptation
Context:
- Studying Mycobacterium leprae (M. leprae) ultrastructure during host passage.
- Investigating bacterial adaptation from human to murine hosts.
- Analyzing morphological changes in M. leprae over serial passages.
Purpose:
- To characterize the ultrastructural changes of M. leprae during intraplantar passage in mice.
- To determine the timeline of M. leprae adaptation to a new mammalian host.
- To inform the use of M. leprae in research and therapeutic development.
Summary:
- Ultrastructural analysis of M. leprae revealed significant morphological changes in the initial three passages in mice.
- Bacteria transitioned from a dormant state to adaptation by passage 3, evidenced by stable cell ultrastructure in subsequent passages (3-8).
- Phenotypic variability during in vivo passage is a key consideration for M. leprae research.
Impact:
- Findings highlight the importance of considering M. leprae's in vivo adaptability.
- Results influence strategies for producing biopreparations and experimental models.
- Informs the screening process for new antileprous drugs.
