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Area of Science:

  • Molecular Biology
  • Immunology
  • Cellular Biology

Background:

  • The unfolded protein response (UPR) is a critical cellular stress pathway.
  • UPR maintains endoplasmic reticulum (ER) homeostasis.
  • UPR also plays a significant role in regulating immune responses.

Purpose of the Study:

  • To review the molecular mechanisms of UPR in immune modulation.
  • To explore small molecules targeting UPR for immune modulation.
  • To discuss novel avenues like stress granules and LCDs for immune modulation.

Main Methods:

  • Literature review of UPR signaling pathways.
  • Analysis of small molecule interactions with UPR sensors (IRE1α, PERK, ATF6).
  • Exploration of stress granules and intrinsically low-complexity domains (LCDs) in UPR.

Main Results:

  • UPR sensors (IRE1α, PERK, ATF6) modulate antigen presentation, cytokine production, and immune cell differentiation.
  • Small molecules can target UPR to modulate immune responses.
  • Stress granules and LCDs represent emerging targets for immune modulation.

Conclusions:

  • UPR is a key regulator of immunity beyond proteostasis.
  • Targeting UPR pathways offers therapeutic potential in immunotherapy, infectious diseases, and inflammatory disorders.
  • Further research into UPR, SGs, and LCDs can unlock new immunomodulatory strategies.