Dissecting the Role of Dectin-1 in the Interaction Between Mycobacteria and Macrophage

Master's Thesis


Previous studies indicate that infection of macrophages with pathogenic mycobacteria like M. tuberculosis and M. avium result in limited production of pro-inflammatory mediators relative to cells infected with attenuated or non-pathogenic mycobacteria. However, how the pathogenic and non-pathogenic mycobacteria elicit such different macrophage responses is unclear. Recent studies suggest a role for Dectin-1 in this differential response. Dectin-1 is a pattern recognition receptor that is expressed on macrophages and DCs, among others. Dectin-1 recognizes Ìøå¢-glucans found on various fungal species and is required for the macrophage production of the pro-inflammatory mediators following fungal infection. Recent studies in our laboratory indicate that Dectin-1 is also engaged upon macrophage infection with non-pathogenic mycobacteria and is required for the optimal macrophage pro-inflammatory response. Interestingly, pathogenic strains of M. avium and M. tuberculosis appear not to engage and/or signal through Dectin-1. To better address interaction between Dectin-1 and mycobacteria I initiated studies to: 1) define the ligand on M. smegmatis which engages Dectin-1 and 2) perform an initial characterization of the dectin-1 mediated signaling pathways activated upon mycobacterial infection


Attribute NameValues
  • etd-07222009-102644

Author Charles Gray Lawrence
Advisor Jeffrey Schorey
Contributor Suzanne Bohlson, Committee Member
Contributor Jeffrey Schorey, Committee Chair
Contributor Crislyn DSouza-Schorey, Committee Member
Degree Level Master's Thesis
Degree Discipline Biological Sciences
Degree Name MS
Defense Date
  • 2009-07-10

Submission Date 2009-07-22
  • United States of America

  • mycobacteria

  • Dectin-1

  • University of Notre Dame

  • English

Record Visibility Public
Content License
  • All rights reserved

Departments and Units


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