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IFN-β: A Contentious Player in Host-Pathogen Interaction in Tuberculosis.

Naveed Sabir1, Tariq Hussain2, Syed Zahid Ali Shah3

  • 1State Key Laboratories for Agrobiotechnology, Key Laboratory of Animal Epidemiology of the Ministry of Agriculture, National Animal Transmissible Spongiform Encephalopathy Laboratory, College of Veterinary Medicine, China Agricultural University, Beijing 100193, China. naveedsabir@upr.edu.pk.

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Interferon-beta (IFN-β) surprisingly aids Mycobacterium tuberculosis (Mtb) survival by suppressing crucial immune responses. Downregulating IFN-β may offer a new therapeutic strategy against tuberculosis (TB).

Keywords:
Mycobacterium tuberculosis (Mtb)fate of infectioninterferon-β (IFN-β)interleukin-1β (IL-1β)nucleotide-binding domain and leucine-rich repeat protein-3 (NLRP3)

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Area of Science:

  • Immunology
  • Microbiology
  • Infectious Diseases

Background:

  • Tuberculosis (TB), caused by Mycobacterium tuberculosis (Mtb), is a global health challenge.
  • Interferon-beta (IFN-β) signaling is vital for innate immunity, but its role in Mtb infection is complex and debated.
  • Mtb manipulates host immunity for survival, making understanding immune mediators critical.

Purpose of the Study:

  • To review the induction, regulation, and role of IFN-β in mycobacterial infections.
  • To elucidate the complex and often pro-bacterial functions of IFN-β in host-pathogen interactions.
  • To explore the potential of targeting IFN-β as a therapeutic strategy for TB.

Main Methods:

  • Review of existing scientific literature on IFN-β and Mtb interactions.
  • Analysis of studies investigating IFN-β's impact on host immune responses.
  • Examination of Mtb's immune evasion mechanisms involving IFN-β.

Main Results:

  • IFN-β exhibits a pro-bacterial role in Mtb infections, contrary to its antiviral functions.
  • IFN-β antagonizes key inflammatory cytokines (IL-1β, IL-18) and NLRP3 inflammasome activation.
  • IFN-β impairs T helper 1 (Th1) responses and reduces MHC-II and IFNGR expression, facilitating Mtb survival.

Conclusions:

  • IFN-β plays a significant role in Mtb survival within host cells.
  • The anti-inflammatory effects of IFN-β contribute to Mtb's immune evasion.
  • Downregulation of IFN-β presents a potential therapeutic avenue for controlling Mtb infection.