Effect of β-cyclodextrin complexation on solubility and enzymatic conversion of naringin

Int J Mol Sci. 2012 Nov 5;13(11):14251-61. doi: 10.3390/ijms131114251.

Abstract

In the present paper, the effect of beta-cyclodextrin (beta-CD) inclusion complexation on the solubility and enzymatic hydrolysis of naringin was investigated. The inclusion complex of naringin/beta-CD at the molar ratio of 1:1 was obtained by the dropping method and was characterized by differential scanning calorimetry. The solubility of naringin complexes in water at 37 ± 0.1 °C was 15 times greater than that of free naringin. Snailase-involved hydrolysis conditions were tested for the bioconversion of naringin into naringenin using the univariate experimental design. Naringin can be transformed into naringenin by snailase-involved hydrolysis. The optimum conditions for enzymatic hydrolysis were determined as follows: pH 5.0, temperature 37 °C, ratio of snailase/substrate 0.8, substrate concentration 20 mg·mL(-1), and reaction time 12 h. Under the optimum conditions, the transforming rate of naringenin from naringin for inclusion complexes and free naringin was 98.7% and 56.2% respectively, suggesting that beta-CD complexation can improve the aqueous solubility and consequently the enzymatic hydrolysis rate of naringin.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Calorimetry, Differential Scanning
  • Flavanones / chemistry*
  • Hydrolysis
  • Kinetics
  • Reproducibility of Results
  • Solubility
  • Temperature
  • beta-Cyclodextrins / chemistry*

Substances

  • Flavanones
  • beta-Cyclodextrins
  • naringin