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Autophagy in Immunity Against Toxoplasma gondii

  • Carlos S. SubausteEmail author
Chapter
Part of the Current Topics in Microbiology and Immunology book series (CT MICROBIOLOGY, volume 335)

Abstract

A decisive outcome during host-pathogen interaction is governed by whether pathogen-containing vacuoles fuse with lysosomes. Fusion with lysosomes typically kills microbes. Toxoplasma gondii represents a classical example of an intracellular pathogen that survives within host cells by preventing the endosomal-lysosomal compartments from fusing with the vacuoles that contain the pathogen. Thus, T. gondii provides an excellent model to determine if the immune system can target a pathogen for lysosomal degradation. CD40, a major regulator of cell-mediated immunity, activates macrophages to kill T. gondii through a process that requires recruitment of autophagosomes around the parasitophorous vacuole, leading to lysosomal degradation of the parasite. These studies demonstrate that cell-mediated immunity can activate autophagy to kill a pathogen. CD40-induced autophagy likely contributes to resistance against T. gondii, particularly in neural tissues, the main sites affected by this pathogen.

Keywords

Lysosomal Degradation Parasitophorous Vacuole Lysosomal Compartment Tissue Cyst Francisella Tularensis 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Notes

Acknowledgments

The original work by the author was supported by the National Institutes of Health, the American Heart Association (Ohio Valley Affiliate), the Juvenile Diabetes Research Foundation International, the Research to Prevent Blindness Foundation and the Ohio Lions Eye Research Foundation.

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Copyright information

© Springer-Verlag Berlin Heidelberg 2009

Authors and Affiliations

  1. 1.Department of Ophthalmology and Visual SciencesCase Western Reserve University School of MedicineClevelandUSA
  2. 2.Department of Medicine, Division of Infectious Diseases and HIV MedicineCase Western Reserve University School of MedicineClevelandUSA
  3. 3.Department of PathologyCase Western Reserve University School of MedicineClevelandUSA

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