FOOD SCIENCE

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Purification of Glucose Tolerance Factor (GTF) from High-Chromium Yeast

KONG Fan-hua, LIU Lu, ZHANG Shu-wen, LU Jing, LI Hong-juan, XUE Hai-xiao, ZHAO Li-li, ZHOU Zhi-jiang, LÜ Jia-ping     

  1. 1. School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China; 2. Institute of Agro-products
    Processing Science and Technology, Chinese Academy of Agricultural Sciences, Beijing 100193, China
  • Online:2014-11-15 Published:2014-11-06

Abstract:

In this study, a mild extraction procedure was used to purify glucose tolerance factor (GTF) from high-chromium
yeast cells. GTF was extracted by ammonia from high-chromium yeast cells. SuperdexTM 75 and Sephadex G25 gel filtration
chromatography were adopted to purify the extracts. Reverse phase high-performance liquid chromatography (RP-HPLC)
was used for further purification. The glucose metabolism regulating activity of GTF was evaluated in insulin-resistant 3T3-L1
adipocytes. This research showed that through multiple steps of column chromatography, the pure GTF was obtained, which could
improve glucose metabolism in insulin-resistant 3T3-L1 adipocytes.

Key words: yeast glucose tolerance factor, high-chromium yeast, purification, insulin-resistant 3T3-L1adipocytes, glucose metabolism