Lesson 1: Extraction and structural characterization of glucomannan from amorphophallustonkinensis and its effect on blood glucose in rats

Tóm tắt

Objective: To isolate glucomannan from the tuber of  Amorphophallus tonkinensis (GMT) and investigate its chemical structure and effect on postprandial blood glucose in rats.
Methods: GMT was isolated and characterized using Fourier transform infrared spectroscopy (FTIR) and nuclear magnetic resonance (NMR) spectroscopy. Its biological effects were evaluated by administering GMT to rats and measuring postprandial blood glucose levels.
Results: GMT was a glucomannan composed of a backbone of -linked β-D-mannopyranosyl and β-D-glucopyranosyl residues, with a mannose/glucose molar ratio of 1.0:0.11. In vivo experiments showed that GMT intake could reduce the rate of glucose absorption, thereby decreasing postprandial blood glucose levels in rats.
Conclusion: Glucomannan was successfully isolated and structurally characterized from the tubers of Amorphophallus tonkinensis. In vivo studies in mice demonstrated that the GMT might modulate blood glucose levels, suggesting its potential as a functional food ingredient for glycemic control.