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Updated: Jan 16, 2026
Assessment of Respiratory Function in Conscious Mice by Double-chamber Plethysmography
Published on: July 10, 2018
Genkwanin reduces airway epithelial cell ferroptosis and alleviates asthma symptoms in mice
Background:
This study investigated the role of genkwanin (GKA) in pediatric asthma.
Methods:
Newborn mice were exposed to house dust mites and treated with GKA to examine airway epithelial cell damage and airway remodeling. The targets of GKA were predicted and verified.
Results:
After medium-dose GKA (M-GKA) treatment, HDM-IgE, HDM-IgG1, IL-5, IL-13, and IL-4 decreased by 28 %, 22 %, 32 %, 48 %, and 38 %, respectively. M-GKA reduced collagen formation by 28 % and MUC5AC protein expression by 30 % in mice. M-GKA reduced Fe2+ content by 32 % and ROS levels by 21 % in airway epithelial cells by inhibiting DYRK1A activity. DYRK1A increased TFE3 cytoplasmic retention by 73 % through enhancing its serine phosphorylation (by 133 %), leading to suppression of LC3BII/I and ATG5 by 32 % and 37 %, and promotion of MDA content by 263 % and ROS accumulation by 43 %. TFE3 triggered autophagy to mitigate ferroptosis (Fe2+ and ROS contents were decreased by 59 % and 25 %, while GPX4 and SLC7A11 were downregulated by 104 % and 88 %). TFE3 knockout weakened the alleviation of airway epithelial cell ferroptosis by GKA, as evidenced by increased Fe2+ content (89 %), MDA and ROS accumulation (73 % and 44 %, respectively). Additionally, it blocked autophagy, as indicated by decreased LC3B (58 %) and ATG5 (51 %) expression.
Conclusions:
GKA inhibits TFE3 phosphorylation via DYRK1A, thereby driving TFE3 nuclear translocation and activating autophagy, which suppresses ferroptosis in airway epithelial cells. This study identifies GKA as a therapeutic candidate for asthma, and screening of additional flavones will be valuable to map the structural features that confer this activity.
Insights
Genkwanin (GKA) treatment in mice reduced asthma indicators and airway remodeling by inhibiting DYRK1A and activating autophagy. This process suppressed ferroptosis in airway epithelial cells, suggesting GKA as a potential asthma therapy.
Area of Science:
- Biochemistry
- Immunology
- Cell Biology
Background:
- Pediatric asthma involves airway epithelial cell damage and remodeling.
- Genkwanin (GKA) is a flavonoid with potential therapeutic properties.
Purpose of the Study:
- To investigate the role and mechanism of genkwanin (GKA) in pediatric asthma.
- To evaluate GKA's effects on airway epithelial cells and remodeling in a mouse model.
Main Methods:
- Newborn mice were exposed to house dust mites and treated with GKA.
- Analyzed immunological markers (IgE, IgG1, IL-4, IL-5, IL-13), airway remodeling indicators (collagen, MUC5AC), ferroptosis markers (Fe2+, ROS, MDA), and autophagy markers (LC3B, ATG5).
- Investigated the interaction between GKA, DYRK1A, and TFE3, including phosphorylation and cellular localization.
Main Results:
- GKA treatment significantly decreased asthma-related immune responses and airway remodeling markers.
- GKA inhibited DYRK1A activity, reducing Fe2+ and ROS levels in airway epithelial cells.
- GKA promoted TFE3 nuclear translocation, activating autophagy and mitigating ferroptosis, which was confirmed by TFE3 knockout experiments.
Conclusions:
- Genkwanin (GKA) suppresses airway epithelial cell ferroptosis by inhibiting DYRK1A-mediated TFE3 phosphorylation, thereby activating autophagy.
- GKA demonstrates therapeutic potential for asthma treatment.
- Further research into flavone structural features could optimize asthma therapies.
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