In vitro antioxidant activity, cyclooxygenase-2, thioredoxin reductase inhibition and DNA protection properties of Teucrium sandrasicum L.


Aksoy-Sagirli P., Ozsoy N., Ecevit-Genc G., Melikoglu G.

Industrial Crops and Products, vol.74, pp.545-550, 2015 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 74
  • Publication Date: 2015
  • Doi Number: 10.1016/j.indcrop.2015.05.025
  • Journal Name: Industrial Crops and Products
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.545-550
  • Istanbul University Affiliated: Yes

Abstract

© 2015 Elsevier B.V.The aerial parts of Teucrium sandrasicum L. (Lamiaceae), an endemic species of the Turkish flora, are widely used in the daily diet. The plant is also valued as a traditional medicine and is used for diuretic, diaphoretic, tonic, antipyretic, antidiabetic, antispasmodic, and cholagogic purposes. This study investigated a methanolic extract of aerial parts of T. sandrasicum for its antioxidant and anti-inflammatory effects, inhibition of thioredoxin reductase, and protection against DNA damage. The extract showed inhibitory activity against FeCl3/ascorbic acid induced phosphatidylcholine liposome oxidation (EC50=1.49±0.03mg/mL), quenched stable DPPH (EC50=1.05±0.03mg/mL), superoxide anion (EC50=1.20±0.06mg/mL), and ABTS cation radicals (EC50=1.73±0.01mg/mL). The extract also acted as a reductant, as determined by the FRAP value (2.66±0.21mM/L Fe2+), indicating its potential as an antioxidant. The T. sandrasicum species was determined to be a rich source of flavonoids (104.39±1.37mg/g), which are likely to serve as antioxidant, anti-inflammatory, and cancer chemoprevention agents. The extract was strongly inhibitory against both cyclooxygenase-2 (COX-2) (EC50=1.18±0.03mg/mL) and thioredoxin reductase (0.90±0.02mg/mL), and it significantly and dose-dependently decreased the amount of nicked DNA, as well as increased the natural form of DNA.