Identification of novel lignans in the whole grain rye bran by non-targeted LC-MS metabolite profiling

Kati Hanhineva, Ilana Rogachev, Anna-Marja Aura, Asaph Aharoni, Kaisa Poutanen, Hannu Mykkänen

Research output: Contribution to journalArticleScientificpeer-review

20 Citations (Scopus)

Abstract

Rye (Secale cereale) is among the richest dietary sources of lignan phytochemicals. Lignans are one of the suggested metabolite groups to contribute to the beneficial health effects of whole grain products evidenced in epidemiological studies. So far, the complete repertoire of lignan derivatives in rye, especially in the bran, has not been fully described. In this study, ten novel oligomeric sesqui- and dilignans were identified in rye bran by the use of high resolution LC-MS analysis (i.e., UPLC-qTOF-MS/MS). Putative identification of lignan components in the bran was performed by combining: (i) detailed inspection of the fragmentation behavior of available standard compounds belonging to different lignan types, (ii) interpretation of MS/MS data obtained from unknown metabolites in the samples. This combined analysis, particularly detailed MS/MS characterization, is most valuable for non-targeted assays in metabolite-rich matrices such as plant extracts, in which the verification of identity with authentic standards for each detected metabolite is normally not possible. Metabolomics analysis will increasingly aid in deciphering the active compounds in dietary products as part of studies aiming at elucidating the link between human health and nutrition.
Original languageEnglish
Pages (from-to)399-409
JournalMetabolomics
Volume8
Issue number3
DOIs
Publication statusPublished - 2012
MoE publication typeA1 Journal article-refereed

Keywords

  • Rye
  • secale cerease
  • whole grain
  • bran
  • lignan
  • phytochemicals
  • metabolite profiling
  • metabolomics
  • LC-MS

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