Identification of peptides in blood following oral administration of β-conglycinin to Wistar rats

Xiaojing Sheng, Satoshi Nagaoka, Marika Hashimoto, Yusuke Amiya, Masato Beppu, Kenichiro Tsukamoto, Emiko Yanase, Mitsuru Tanaka, Toshiro Matsui

Research output: Contribution to journalArticlepeer-review

Abstract

In this study, β-conglycinin (100 mg/kg) was orally administered to Wistar rats in order to identify peptides that may be derived from the protein in the blood. Plasma samples taken from the tail vein up to 8 h after administration were analyzed by matrix-assisted laser desorption/ionization (MALDI) and liquid chromatography-time-of-flight (LC-TOF) mass spectrometry (MS). In total, 126 signals were detected by MALDI-MS. Among the signals, nine oligopeptides (SEL, KGPL, SILGA, DSEL, GDANI, SYFV, CLQSC, GEQPRPF, and LVINEGDA) were successfully identified as β-conglycinin-derived peptides by LC-TOF/MS at a plasma concentration of 0.75–756 pmol/mL. The results demonstrated that β-conglycinin could be the dietary source protein for the oligopeptides produced prior to entering the circulating bloodstream of rats.

Original languageEnglish
Article number128197
JournalFood Chemistry
Volume341
DOIs
Publication statusPublished - Mar 30 2021

All Science Journal Classification (ASJC) codes

  • Analytical Chemistry
  • Food Science

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