NOD1 and NOD2 Activation by Diverse Stimuli: a Possible Role for Sensing Pathogen-Induced Endoplasmic Reticulum Stress

Infect Immun. 2020 Jun 22;88(7):e00898-19. doi: 10.1128/IAI.00898-19. Print 2020 Jun 22.

Abstract

Prompt recognition of microbes by cells is critical to eliminate invading pathogens. Some cell-associated pattern recognition receptors (PRRs) recognize and respond to microbial ligands. However, others can respond to cellular perturbations, such as damage-associated molecular patterns (DAMPs). Nucleotide oligomerization domains 1 and 2 (NOD1/2) are PRRs that recognize and respond to multiple stimuli of microbial and cellular origin, such as bacterial peptidoglycan, viral infections, parasitic infections, activated Rho GTPases, and endoplasmic reticulum (ER) stress. How NOD1/2 are stimulated by such diverse stimuli is not fully understood but may partly rely on cellular changes during infection that result in ER stress. NOD1/2 are ER stress sensors that facilitate proinflammatory responses for pathogen clearance; thus, NOD1/2 may help mount broad antimicrobial responses through detection of ER stress, which is often induced during a variety of infections. Some pathogens may subvert this response to promote infection through manipulation of NOD1/2 responses to ER stress that lead to apoptosis. Here, we review NOD1/2 stimuli and cellular responses. Furthermore, we discuss pathogen-induced ER stress and how it might potentiate NOD1/2 signaling.

Keywords: ER stress; NOD1; NOD2; pathogens.

Publication types

  • Review

MeSH terms

  • Animals
  • Calcium / metabolism
  • Endoplasmic Reticulum Stress* / genetics
  • Homeostasis
  • Host-Pathogen Interactions*
  • Humans
  • Nod1 Signaling Adaptor Protein / genetics
  • Nod1 Signaling Adaptor Protein / metabolism*
  • Nod2 Signaling Adaptor Protein / genetics
  • Nod2 Signaling Adaptor Protein / metabolism*
  • Peptidoglycan / metabolism
  • Protein Binding
  • Signal Transduction

Substances

  • Nod1 Signaling Adaptor Protein
  • Nod2 Signaling Adaptor Protein
  • Peptidoglycan
  • Calcium