Aryl hydrocarbon receptor regulates programmed cell death in diseases: molecular mechanisms and therapeutic

Yuanyuan Jiang1, Zhiyuan Qiang2, Like Zhu1

  • 1Translational Medical Innovation Center, Zhangjiagang TCM Hospital Affiliated to Nanjing University of Chinese Medicine, Zhangjiagang, Jiangsu, China.

Frontiers in Immunology
|August 12, 2026
PubMed

Insights

The aryl hydrocarbon receptor (AHR) regulates diverse cell death pathways, impacting disease development. Understanding AHR

Area of Science:

  • Molecular Biology
  • Cell Biology
  • Immunology

Background:

  • The aryl hydrocarbon receptor (AHR) is a ligand-activated transcription factor integrating environmental, dietary, and metabolic signals.
  • AHR plays a critical role in orchestrating complex biological processes and is implicated in various cell death pathways.
  • Originally identified as a toxin sensor, AHR's role extends to endogenous and microbial ligand interactions.

Purpose of the Study:

  • To synthesize current knowledge on AHR's structural dynamics, ligand diversity, and activation mechanisms.
  • To highlight AHR's dual roles in programmed cell death (PCD).
  • To discuss the significance of AHR-regulated cell death in human diseases and its therapeutic potential.

Main Methods:

  • Literature review and synthesis of existing research on AHR.
  • Analysis of AHR's involvement in apoptosis, necroptosis, autophagy, pyroptosis, and ferroptosis.
  • Examination of AHR's role in the pathogenesis of inflammatory diseases, neurological disorders, respiratory diseases, and cancer.

Main Results:

  • AHR exhibits ligand-specific, cell type-specific, and context-specific transcriptional control.
  • AHR actively participates in the regulation of multiple programmed cell death pathways.
  • AHR signaling is crucial in the pathogenesis of a wide range of human diseases.

Conclusions:

  • AHR is a key regulator of programmed cell death with significant implications in disease.
  • AHR's multifaceted roles in cell death present potential therapeutic strategies for various human conditions.
  • Further research into AHR-regulated cell death mechanisms could unlock novel treatment avenues.

Related Concept Videos

The Extrinsic Apoptotic Pathway01:17

The Extrinsic Apoptotic Pathway

The extrinsic apoptotic pathway is initiated when extracellular death-inducing signals, such as specific cytokines, activate the death receptors expressed on the cell surface. The immune cells involved in this pathway are natural killer cells (NK cells) and cytotoxic T-lymphocytes. NK cells are critical in innate immune response, while cytotoxic T-lymphocytes are associated with adaptive immune response. These cells recognize specific receptors expressed on the altered cells and activate...
Apoptosis01:30

Apoptosis

Apoptosis is a combination of two Greek words, 'apo' and 'ptosis,' meaning separation and falling off, respectively. Hippocrates used this word to describe gangrene, which was caused due to bandaging of fractured bones. Apoptosis was distinguished from necrosis in 1970 when John Kerr reported observations of morphological changes occurring during apoptosis. During one experiment, he observed that the disruption of blood supply to the liver tissue resulted in a size reduction of the tissue.
The Intrinsic Apoptotic Pathway01:31

The Intrinsic Apoptotic Pathway

Internal cellular stress, such as cellular injury or hypoxia, triggers intrinsic apoptosis. The B-cell lymphoma 2 (Bcl-2) family of proteins are the primary regulators of the intrinsic apoptotic pathway. For example, during DNA damage, checkpoint proteins, such as Ataxia Telangiectasia Mutated (ATM protein) and Checkpoints Factor-2 (Chk2) proteins, are activated. These proteins phosphorylate p53 which further activates pro-apoptotic proteins, such as Bax, Bak, PUMA, and Noxa, and inhibits...
Cellular Injury V: Apoptosis and Autophagy01:22

Cellular Injury V: Apoptosis and Autophagy

Cells respond to damage and stress through highly coordinated processes that decide whether they survive or undergo controlled self-destruction. Two major pathways involved in this regulation are apoptosis, a type of programmed cell death, and autophagy, a survival mechanism that helps cells adapt to adverse conditions.ApoptosisApoptosis removes aged or injured cells to maintain tissue balance. During this process, the cell shrinks, chromatin condenses and fragments, and membrane-bound...
Overview of Cell Death01:30

Overview of Cell Death

Cell death is an essential process where the body gets rid of old or damaged cells. Cell proliferation and death need to be balanced, as an imbalance between the two may lead to cancer or autoimmune diseases.
Cell death was observed in the early 19th century, but there was no experimental evidence to prove it. In 1842, Carl Vogt first discovered cell death in a metamorphic toad; however, it was not termed ‘cell death.’ Scientists discovered different cell death pathways only in the 20th century...
Cellular Injury IlI: Cellular Death01:11

Cellular Injury IlI: Cellular Death

Cell death is the irreversible loss of cellular structure and function, representing the final stage of severe injury. It plays a key role in both normal physiology and disease.Types of Cell DeathThe two main types are necrosis and apoptosis, though others like necroptosis and pyroptosis also exist.Necrosis:Necrosis is an unregulated form of cell death caused by severe injury such as trauma, toxins, or ischemia. It is characterized by cell swelling, membrane loss, rupture, and leakage of...