The diet rich in fruits and vegetables reduces the risk of metabolic syndrome, including diabetes development by various mechanisms of action, mainly due to the presence of polyphenolic compounds. Extracts from different conifer species are known to be a rich source of various polyphenols. In the present study we elucidated the in vitro mechanism of anti-diabetic activity of silver fir (Abies alba) wood and bark extracts and compared their activity to non-coniferous sweet chestnut wood extract and standardized maritime pine bark extract. Extracts and lignans were tested for their inhibitory activity of enzymes involved in the regulation of blood glucose in vitro. The ability of extracts to protect against oxidative stress in high glucose environment was tested on mouse myoblast cell line. Silver fir wood and bark extracts were shown to be effective inhibitors of α-glucosidase, α-amylase and dipeptidyl peptidase 4, three enzymes involved in the regulation of blood glucose levels. Coniferous extracts also showed protection against oxidative stress generated in high glucose environment. Lignans, particularly pinoresinol diglucoside, isolariciresinol and secolariciresinol were shown to be important contributors of antihyperglycemic activity through inhibition of dipeptidyl peptidase 4. This corroborates previously published in vivo results on blood glucose level obtained with silver fir wood extract and supports the use of silver fir wood and bark extracts as food supplements or functional foods in borderline diabetes.

• MeSH
• alfa-amylasy antagonisté a inhibitory   MeSH
• alfa-glukosidasy metabolismus   MeSH
• buněčné linie MeSH
• dipeptidylpeptidasa 4 metabolismus   MeSH
• dřevo chemie   MeSH
• hypoglykemika izolace a purifikace   farmakologie   MeSH
• inhibitory dipeptidylpeptidasy 4 izolace a purifikace   farmakologie   MeSH
• inhibitory glykosidových hydrolas izolace a purifikace   farmakologie   MeSH
• jedle chemie   MeSH
• krevní glukóza účinky léků   MeSH
• kůra rostlin chemie   MeSH
• lidé MeSH
• myši MeSH
• oxidační stres účinky léků   MeSH
• rostlinné extrakty izolace a purifikace   farmakologie   MeSH
• zvířata MeSH
• Check Tag
• lidé MeSH
• myši MeSH
• zvířata MeSH
• Publikační typ
• časopisecké články MeSH