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Adherence of group A streptococci to epithelial cells in tissue culture
Zentralblatt Fur Bakteriologie. 1. Abt. Originale. A: Medizinische Mikrobiologie, Infektionskrankheiten Und Parasitologie
|August 1, 1980
Abstract:
Using the HEp-2 cell line system the factors and mechanisms of group A Streptococcus adherence had been studied. It was shown that high adherence was chiefly found in strains showing attributes of virulence (presence of M protein, growth in human blood, lethality for mice). The data supplied by experiments with pepsin and LTA suggest that there exist at least two mechanisms of adherence.
Insights
Group A Streptococcus adherence is linked to virulence factors like M protein. Experiments suggest multiple adherence mechanisms, involving pepsin and lipoteichoic acid (LTA).
Area of Science:
- Microbiology
- Cell Biology
- Infectious Diseases
Background:
- Group A Streptococcus (GAS) is a significant human pathogen.
- Bacterial adherence to host cells is a critical step in infection.
- Understanding GAS adherence mechanisms is crucial for developing effective treatments.
Purpose of the Study:
- To investigate the factors and mechanisms of Group A Streptococcus adherence to HEp-2 cells.
- To correlate adherence with bacterial virulence attributes.
Main Methods:
- Utilized the HEp-2 cell line as an in vitro model system.
- Assessed adherence of GAS strains with varying virulence factors.
- Conducted experiments involving pepsin and lipoteichoic acid (LTA).
Main Results:
- High adherence was predominantly observed in virulent GAS strains.
- Virulent strains exhibited M protein, growth in human blood, and mouse lethality.
- Experimental data indicated at least two distinct adherence mechanisms.
Conclusions:
- Bacterial virulence factors, particularly M protein, significantly enhance GAS adherence.
- Multiple pathways likely contribute to GAS adherence to host cells.
- Further research into these mechanisms could reveal therapeutic targets.