Effect of 1-oxo-5beta, 6beta-epoxy-witha-2-ene-27-ethoxy-olide isolated from the roots of Withania somnifera on stress indices in Wistar rats.
Ключови думи
Резюме
OBJECTIVE
Isolation of biologically active fractions and compounds from the roots of Withania somnifera, a plant used extensively as a constituent of rasayana, in Ayurveda and to test their adaptogenic activity on stress indices using the cold-hypoxia-restraint (C-H-R) model.
METHODS
Bioactivity-guided fractionation of an aqueous extract of the roots of Withania somnifera led to the isolation of a new species of withanolide 1-oxo-5beta, 6beta-epoxy-witha-2-ene-27-ethoxy-olide. Structure elucidation, was carried out using proton nuclear magnetic resonance, infrared (IR), ultraviolet (UV), and mass spectroscopic analysis. Stress-related indices were evaluated, namely serum creatine phosphokinase (CPK) activity, serum lactate dehydrogenase (LDH) activity, serum corticosterone levels, and serum lipid peroxidation (LPO) levels.
RESULTS
There was a significant decrease in a serum CPK, LDH, and LPO levels in animals pretreated with (1) fraction-I (20 mg/kg body weight), (2) 1-oxo-5beta, 6beta-epoxy-witha-2-ene-27-ethoxy-olide (2.5 mg/kg body weight) in comparison to control when subjected to C-H-R stress.
CONCLUSIONS
The results show that the a new species of withanolide, 1-oxo-5beta, 6beta-epoxy-witha-2-ene-27-ethoxy-olide (compound-1) could prove to be an effective agent to counteract C-H-R stress.
