2. Academic Validation
  3. Iodine/soluble starch cryogel: An iodine-based antiseptic with instant water-solubility, improved stability, and potent bactericidal activity

Iodine/soluble starch cryogel: An iodine-based antiseptic with instant water-solubility, improved stability, and potent bactericidal activity

  • Carbohydr Polym. 2024 Sep 15:340:122217. doi: 10.1016/j.carbpol.2024.122217.
Wei Sun 1,  Zi-Xi Wang 2,  Yuxin Guo 2,  Chengcheng Li 3,  Ge Gao 2,  Fu-Gen Wu 4
Affiliations

Affiliations

  • 1 State Key Laboratory of Digital Medical Engineering, Jiangsu Key Laboratory for Biomaterials and Devices, School of Biological Science and Medical Engineering, Southeast University, 2 Southeast University Road, Nanjing 211189, PR China; Department of Chemistry, University of Michigan, 930 N. University Ave., Ann Arbor, MI 48109, USA. Electronic address: weischem@umich.edu.
  • 2 State Key Laboratory of Digital Medical Engineering, Jiangsu Key Laboratory for Biomaterials and Devices, School of Biological Science and Medical Engineering, Southeast University, 2 Southeast University Road, Nanjing 211189, PR China.
  • 3 International Innovation Center for Forest Chemicals and Materials and Jiangsu Co-Innovation Center for Efficient Processing and Utilization of Forest Resources, Nanjing Forestry University, Nanjing 210037, PR China.
  • 4 State Key Laboratory of Digital Medical Engineering, Jiangsu Key Laboratory for Biomaterials and Devices, School of Biological Science and Medical Engineering, Southeast University, 2 Southeast University Road, Nanjing 211189, PR China. Electronic address: wufg@seu.edu.cn.
PMID: 38857997 DOI: 10.1016/j.carbpol.2024.122217
Abstract

Iodine (I2) as a broad-spectrum antiseptic has been widely used for treating Bacterial infections. However, I2 has low water-solubility and sublimes under ambient conditions, which limits its practical Antibacterial applications. The highly specific and sensitive reaction between I2 and starch discovered 200 years ago has been extensively applied in analytical chemistry, but the Antibacterial activity of the I2-starch complex is rarely investigated. Herein, we develop a novel type of iodine-based antiseptics, iodine-soluble starch (I2-SS) cryogel, which can dissolve in water instantly and almost completely kill bacteria in 10 min at 2 μg/mL of I2. Although KI3 and the commercially available povidone‑iodine (I2-PVP) solutions show similar Antibacterial efficacy, the high affinity of I2 to SS largely enhances the shelf stability of the I2-SS solution with ∼73 % I2 left after one-week storage at room temperature. In sharp contrast, ∼8.5 % and ∼2.5 % I2 are detected in KI3 and I2-PVP solutions, respectively. Mechanistic study reveals that the potent Antibacterial effect of I2-SS originates from its attack on multiple Bacterial targets. The outstanding Antibacterial activity, capability of accelerating wound healing, and good biocompatibility of I2-SS are verified through further in vivo experiments. This work may promote the development of next-generation iodine-based antiseptics for clinical use.

Keywords

Antibacterial; Cryogel; Iodine; Starch; Wound healing.

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