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Fluorescence Assays for the Study of Mycobacterium tuberculosis Interaction with the Immune Receptor SLAMF1
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Platelets immune response against Mycobacterium tuberculosis infection
Flor Torres-Juarez1, Luis A Trejo-Martínez2, Esther Layseca-Espinosa3
1Biomedical Research Unit of Zacatecas-Mexican Institute of Social Security, Zacatecas, Mexico; Laboratory of Immunology, Autonomous University of San Luis Potosí, San Luis Potosi, Mexico.
Microbial Pathogenesis
|February 1, 2021
Summary
Platelets are recruited to tuberculosis granulomas and can internalize Mycobacterium tuberculosis. These platelets produce host defense peptides and cytokines, suggesting a role in the immune response to tuberculosis.
Area of Science:
- Immunology
- Infectious Diseases
- Hematology
Background:
- Tuberculosis (TB) remains a leading infectious cause of death globally.
- Platelets have been observed in TB granulomas, but their immune function against Mycobacterium tuberculosis (Mtb) is not well understood.
Purpose of the Study:
- To investigate the role and immune response of platelets during Mycobacterium tuberculosis infection.
Main Methods:
- Electron microscopy to visualize platelets and Mtb.
- Analysis of host defense peptide (HDP) and cytokine production by Mtb-infected platelets.
Main Results:
- Platelets are recruited to TB granulomas in later stages of infection.
- Platelets internalize Mtb and produce HDPs (RNase 7, HBD2, hPF-4) that bind Mtb.
- Mtb-infected platelets show increased IL-1β and TNF-α transcription/secretion, with decreased IL-10 and IL-6 protein.
Conclusions:
- Platelets actively participate in the immune response against Mtb.
- Platelet-mediated production of HDPs and cytokines is a key mechanism in combating tuberculosis.
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