Frontiers in Immunology (Feb 2021)

The Roles of Immunoregulatory Networks in Severe Drug Hypersensitivity

  • Yun-Shiuan Olivia Hsu,
  • Yun-Shiuan Olivia Hsu,
  • Kun-Lin Lu,
  • Kun-Lin Lu,
  • Kun-Lin Lu,
  • Kun-Lin Lu,
  • Yun Fu,
  • Yun Fu,
  • Yun Fu,
  • Yun Fu,
  • Chuang-Wei Wang,
  • Chuang-Wei Wang,
  • Chun-Wei Lu,
  • Chun-Wei Lu,
  • Chun-Wei Lu,
  • Chun-Wei Lu,
  • Yu-Fen Lin,
  • Yu-Fen Lin,
  • Wen-Cheng Chang,
  • Wen-Cheng Chang,
  • Wen-Cheng Chang,
  • Kun-Yun Yeh,
  • Kun-Yun Yeh,
  • Shuen-Iu Hung,
  • Shuen-Iu Hung,
  • Wen-Hung Chung,
  • Wen-Hung Chung,
  • Wen-Hung Chung,
  • Wen-Hung Chung,
  • Wen-Hung Chung,
  • Wen-Hung Chung,
  • Wen-Hung Chung,
  • Wen-Hung Chung,
  • Wen-Hung Chung,
  • Wen-Hung Chung,
  • Chun-Bing Chen,
  • Chun-Bing Chen,
  • Chun-Bing Chen,
  • Chun-Bing Chen,
  • Chun-Bing Chen,
  • Chun-Bing Chen,
  • Chun-Bing Chen,
  • Chun-Bing Chen,
  • Chun-Bing Chen

DOI
https://doi.org/10.3389/fimmu.2021.597761
Journal volume & issue
Vol. 12

Abstract

Read online

The immunomodulatory effects of regulatory T cells (Tregs) and co-signaling receptors have gained much attention, as they help balance immunogenic and immunotolerant responses that may be disrupted in autoimmune and infectious diseases. Drug hypersensitivity has a myriad of manifestations, which ranges from the mild maculopapular exanthema to the severe Stevens-Johnson syndrome (SJS), toxic epidermal necrolysis (TEN), and drug reaction with eosinophilia and systemic symptoms/drug-induced hypersensitivity syndrome (DRESS/DIHS). While studies have identified high-risk human leukocyte antigen (HLA) allotypes, the presence of the HLA allotype at risk is not sufficient to elicit drug hypersensitivity. Recent studies have suggested that insufficient regulation by Tregs may play a role in severe hypersensitivity reactions. Furthermore, immune checkpoint inhibitors, such as anti-CTLA-4 or anti-PD-1, in cancer treatment also induce hypersensitivity reactions including SJS/TEN and DRESS/DIHS. Taken together, mechanisms involving both Tregs as well as coinhibitory and costimulatory receptors may be crucial in the pathogenesis of drug hypersensitivity. In this review, we summarize the currently implicated roles of co-signaling receptors and Tregs in delayed-type drug hypersensitivity in the hope of identifying potential pharmacologic targets.

Keywords