Polyphenolic natural products as photosensitizers for antimicrobial photodynamic therapy: recent advances and future prospects

Front Immunol. 2023 Oct 31:14:1275859. doi: 10.3389/fimmu.2023.1275859. eCollection 2023.

Abstract

Antimicrobial photodynamic therapy (aPDT) has become a potent contender in the fight against microbial infections, especially in the context of the rising antibiotic resistance crisis. Recently, there has been significant interest in polyphenolic natural products as potential photosensitizers (PSs) in aPDT, given their unique chemical structures and inherent antimicrobial properties. Polyphenolic natural products, abundant and readily obtainable from natural sources, are generally regarded as safe and highly compatible with the human body. This comprehensive review focuses on the latest developments and future implications of using natural polyphenols as PSs in aPDT. Paramount polyphenolic compounds, including curcumin, hypericin, quercetin, hypocrellin, celastrol, riboflavin, resveratrol, gallic acid, and aloe emodin, are elaborated upon with respect to their structural characteristics, absorption properties, and antimicrobial effects. Furthermore, the aPDT mechanism, specifically its targeted action on microbial cells and biofilms, is also discussed. Polyphenolic natural products demonstrate immense potential as PSs in aPDT, representing a promising alternate approach to counteract antibiotic-resistant bacteria and biofilm-related infections.

Keywords: antibacterial; natural products; photodynamic therapy; photosensitizers; polyphenols.

Publication types

  • Review
  • Research Support, Non-U.S. Gov't

MeSH terms

  • Anti-Bacterial Agents / pharmacology
  • Bacteria
  • Drug Resistance, Microbial
  • Humans
  • Photochemotherapy* / methods
  • Photosensitizing Agents* / pharmacology
  • Photosensitizing Agents* / therapeutic use

Substances

  • Photosensitizing Agents
  • Anti-Bacterial Agents

Grants and funding

The author(s) declare financial support was received for the research, authorship, and/or publication of this article. This study was supported by grants from the National Natural Science Foundation of China (22177084, 82273559, 82103757 and 82073473), the China Postdoctoral Science Foundation (2022M722283), PostDoctor Research Project, West China Hospital, Sichuan University (2023HXBH076), Sichuan Natural Science Foundation Project (2023NSFSC1554), the Science and Technology Department of Sichuan Province (2022YFQ0054), Sichuan Provincial Administration of Traditional Chinese Medicine (2023MS324) and the 1.3.5 Project for Disciplines of Excellence, West China Hospital, Sichuan University (ZYJC21036).