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Salmonella typhimurium porin internalization by leukocytes
M Galdiero1, F Brancaccio, C Nazzaro
1Dipartimento di Patologia e Sanità Animale, Facoltà di Medicina Veterinaria, Università degli Studi di Napoli Federico II, Italy.
Research in Microbiology
|November 25, 1998
Summary
Salmonella typhimurium porins were detected in human immune cells, specifically monocytes and lymphocytes. These bacterial porins were predominantly found within the nuclear regions of the lymphomonocytes.
Area of Science:
- Microbiology
- Immunology
- Cell Biology
Background:
- Salmonella typhimurium is a significant human pathogen.
- Understanding bacterial-host interactions is crucial for infectious disease research.
- Porins are essential outer membrane proteins in Gram-negative bacteria.
Purpose of the Study:
- To investigate the cellular localization of Salmonella typhimurium porins within human immune cells.
- To determine if bacterial porins can be found in host cells following infection or exposure.
Main Methods:
- High-resolution autoradiography was employed to visualize porin location.
- Human monocytes and lymphocytes were used as the host cell models.
- Ultrathin sections of treated cells were analyzed for the presence of porins.
Main Results:
- Traces of Salmonella typhimurium porins were frequently observed in treated human lymphomonocytes.
- The detected porins were primarily located in the nuclear areas of these host cells.
- Autoradiographic signals indicated the presence of bacterial components within the host cell nucleus.
Conclusions:
- Bacterial porins can be internalized and detected within human monocytes and lymphocytes.
- The nuclear localization of Salmonella typhimurium porins suggests potential interactions with host cell nuclear components.
- These findings open new avenues for exploring Salmonella-host cell nuclear interactions.