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Quantifying Plant Soluble Protein and Digestible Carbohydrate Content, Using Corn Zea mays As an Exemplar
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Extraction Optimization, Preliminary Identification, and Bioactivities in Corn Silk.

Ping Li1, Guangxi Ren1, Yifan Sun1

  • 1School of Chinese Materia Medica, Beijing University of Chinese Medicine, Beijing 102488, China.

Evidence-Based Complementary and Alternative Medicine : Ecam
|February 13, 2023
PubMed
Summary
This summary is machine-generated.

Optimized corn silk extraction enhances flavonoid content and biological activities, including antibacterial and hypoglycemic effects. This research supports corn silk

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Area of Science:

  • Phytochemistry
  • Pharmacology
  • Natural Product Chemistry

Background:

  • Corn silk (Zea mays L.) possesses traditional medicinal uses, including antidiabetic and antioxidant properties.
  • Limited studies correlate specific flavonoid profiles with corn silk's biological efficacy.
  • Understanding flavonoid composition is crucial for its pharmaceutical and food applications.

Purpose of the Study:

  • To optimize flavonoid extraction from corn silk using response surface methodology.
  • To identify and quantify major flavonoid compounds in the optimized extracts.
  • To correlate flavonoid composition with observed antibacterial and hypoglycemic activities.

Main Methods:

  • Response surface methodology (RSM) for optimizing ultrasonic-assisted extraction (UAE) parameters (time, temperature, liquid-to-material ratio, ethanol concentration).
  • Ultra-performance liquid chromatography-linear trap quadrupole/Orbitrap mass spectrometry (UPLC-LTQ/Orbitrap MS) for compound identification and quantification.
  • Assays for antibacterial activity against Bacillus subtilis and in vitro hypoglycemic activity.

Main Results:

  • Optimized UAE conditions yielded significantly higher total flavonoid content (TFC) compared to traditional methods.
  • UPLC-LTQ/Orbitrap MS identified 20 major compounds, including several flavonoids.
  • Optimized extracts demonstrated potent antibacterial activity against Bacillus subtilis and significant hypoglycemic effects.
  • Six specific corn silk components were identified as key contributors to these biological activities.

Conclusions:

  • The optimized UAE method is effective for maximizing flavonoid extraction from corn silk.
  • The identified flavonoid profile is strongly correlated with the observed antibacterial and hypoglycemic properties.
  • This study provides a scientific basis for the application of corn silk extracts in the food and pharmaceutical industries.