2. Academic Validation
  3. The therapeutic role and mechanism of 4-Methoxycinnamic acid in fungal keratitis

The therapeutic role and mechanism of 4-Methoxycinnamic acid in fungal keratitis

  • Int Immunopharmacol. 2023 Feb 1;116:109782. doi: 10.1016/j.intimp.2023.109782.
Yuwei Wang 1,  Min Yin 1,  Lingwen Gu 1,  Wendan Yi 1,  Jing Lin 1,  Lina Zhang 1,  Qian Wang 1,  Yinghe Qi 1,  Weilin Diao 1,  Menghui Chi 1,  Hengrui Zheng 1,  Cui Li 2,  Guiqiu Zhao 3
Affiliations

Affiliations

  • 1 Department of Ophthalmology, The Affiliated Hospital of Qingdao University, NO. 16 Jiangsu Road, Qingdao, Shandong Province 266000, China.
  • 2 Department of Ophthalmology, The Affiliated Hospital of Qingdao University, NO. 16 Jiangsu Road, Qingdao, Shandong Province 266000, China. Electronic address: yankelicui@126.com.
  • 3 Department of Ophthalmology, The Affiliated Hospital of Qingdao University, NO. 16 Jiangsu Road, Qingdao, Shandong Province 266000, China. Electronic address: zhaoguiqiu_good@126.com.
PMID: 36731151 DOI: 10.1016/j.intimp.2023.109782
Abstract

Fungal keratitis is an infectious vision-threatening disease that has a poor prognosis, and the clinical therapeutic drugs have multiple limitations, such as epithelial toxicity and low bioavailability. Therefore, new Antifungal treatment strategies must be developed. 4-Methoxycinnamic acid (MCA) is a widely occurring natural phenolic acid that has been proven to have multiple effects, such as Antibacterial, Antifungal, anti-inflammatory, neuroprotective, and inhibiting Cancer. In this research, we explored the effects and underlying mechanisms of MCA on A. fumigatus keratitis and the Antifungal effects of the combination of MCA and natamycin (NATA) on A. fumigatus. We found that MCA exerts Antifungal effects by inhibiting the synthesis of the Fungal cell wall, changing the permeability of Fungal cell membranes. Moreover, the MCA-NATA combination exhibited synergy for A. fumigatus. In addition, MCA exerted an anti-inflammatory effect by downregulating the inflammatory factors (IL-1β, TNF-α, IL-6, and iNOS) in C57BL/6 mice and RAW264.7 cells. The anti-inflammatory mechanism of MCA was associated with the Mincle signal pathway. In summary, MCA acts as a potential therapeutic drug for Fungal keratitis and a potential Antifungal sensitizer for natamycin. MCA inhibits Fungal cell wall synthesis, destroys the permeability of Fungal cell membranes, and mediates the anti-inflammatory, immune response of the host.

Keywords

4-Methoxycinnamic acid; A. fumigatus; Antifungal; Innate immune response; Mincle.

Figures
Products