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Controlled Nutrient Delivery through a pH-Responsive Wood Vehicle.

Qian Luan1, Hao Zhang1, Chaoji Chen2

  • 1Oil Crops and Lipids Process Technology National & Local Joint Engineering Laboratory, Key Laboratory of Oilseeds Processing, Ministry of Agriculture, Hubei Key Laboratory of Lipid Chemistry and Nutrition, Oil Crops Research Institute of the Chinese Academy of Agricultural Sciences, Wuhan 430062, China.

ACS Nano
|February 10, 2022
PubMed
Summary

Researchers developed a novel "wood scroll" system for targeted intestinal nutrient delivery. This sustainable system protects nutrients and ensures controlled release, improving health and reducing disease risk.

Keywords:
controlled releasenutrient-delivery systemspH-responsivestructurally controlledwood scrolls

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Area of Science:

  • Biomaterials Engineering
  • Nutraceutical Delivery Systems
  • Sustainable Materials Science

Background:

  • Intestinal-targeted delivery of nutrients is crucial for enhancing health and reducing disease risk.
  • Existing delivery systems often face challenges with nutrient protection and controlled release.
  • Biocompatible, low-cost materials with inherent structural properties are needed for advanced nutrient delivery.

Purpose of the Study:

  • To present a novel pH-responsive nutrient-delivery system based on a flexible wood substrate, termed a "wood scroll".
  • To demonstrate the capability of wood scrolls for protecting and controllably releasing nutrients within the intestine.
  • To explore the potential for customized nutrient management through modification of wood scroll properties.

Main Methods:

  • Fabrication of pH-responsive "wood scrolls" using flexible wood substrates with natural microchannels.
  • Loading of nutrients, including probiotics, tea polyphenols, and rapeseed oil, into the wood microchannels.
  • In vitro testing under simulated stomach and intestinal conditions to assess survival rates and release kinetics.
  • Modification of macroscopic geometry and microstructures to tune loading and release behaviors.

Main Results:

  • Probiotic-loaded wood scrolls demonstrated high survival rates (95.40%) under simulated stomach conditions.
  • Sustained release of probiotics over 8 hours at a constant rate (4.17 × 10^8 CFUs/h) was observed in simulated intestinal conditions.
  • The system successfully delivered other nutrients like tea polyphenols and rapeseed oil.
  • Nutrient loading and release profiles were tunable by altering wood scroll geometry and microstructure.

Conclusions:

  • The "wood scroll" system offers a promising strategy for structurally controlled enteric nutrient delivery.
  • Readily available, low-cost, and biocompatible wood materials can be utilized for effective nutrient storage, protection, and controlled release.
  • This approach enables personalized nutrient management and enhances nutrient bioactivity through targeted intestinal delivery.