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Bioactivity of Vitamin E Long-Chain Metabolites

  • Stefan Kluge
  • Martin Schubert
  • Lisa Schmölz
  • Maria Wallert
  • Marc Birringer
  • Stefan LorkowskiEmail author
Chapter
Part of the Nutrition and Health book series (NH)

Abstract

Metabolic activation has been described as a key factor for the bioactivity of fat-soluble vitamins in the human body, except for vitamin E. During hepatic metabolism of vitamin E, the long-chain metabolites (LCMs) 13′-hydroxychromanol (13′-OH) and 13′-carboxychromanol (13′-COOH) are formed by oxidative modification of the side chain. These metabolites were detected in human serum, indicating a physiological relevance for the human body. Given that only 1% of the total body tocopherol is transported in blood, the determination of the LCMs in extra hepatic tissues is important for improving our understanding of the distribution of LCMs in the body. Therefore, enhancing current analytical procedures for the LCMs, with respect to detection sensitivity for substances in nanomolar concentrations, is indispensable. As a confirmation of their bioactivity, the effects of the LCMs on inflammation, lipid metabolism, cancerogenesis, and chemoprevention as well as xenobiotic metabolism have been studied. Although their exact modes of action are still unknown, there are several parallels between the regulatory actions of the LCMs of vitamin E and the active metabolites of vitamin A and D. Taken together, the recent findings provide evidence for a general concept of metabolic activation of the fat-soluble vitamins to regulatory metabolites, mediating various processes in the body.

Keywords

Vitamin E Long-chain metabolites of vitamin E 13′-hydroxychromanol (13′-OH) 13′-carboxychromanol (13′-COOH) Vitamin E metabolism Biological activity 

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Copyright information

© Springer Nature Switzerland AG 2019

Authors and Affiliations

  • Stefan Kluge
    • 1
    • 2
  • Martin Schubert
    • 1
    • 2
  • Lisa Schmölz
    • 1
    • 2
  • Maria Wallert
    • 1
    • 3
  • Marc Birringer
    • 4
  • Stefan Lorkowski
    • 1
    • 2
    Email author
  1. 1.Institute of Nutritional SciencesFriedrich Schiller University JenaJenaGermany
  2. 2.Competence Cluster for Nutrition and Cardiovascular Health (nutriCARD)Halle-Jena-LeipzigGermany
  3. 3.Baker Heart and Diabetes InstituteMelbourneAustralia
  4. 4.University of Applied Sciences FuldaNutritional, Food and Consumer SciencesFuldaGermany

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