Study the Effect of Drakshasava on Dopamine, Serotonin and Cortisol Levels and Behavioural Changes in Acute and Chronic Stress Model in Wistar Rats

Abstract

Drakshasava is a formulation used as a general tonic also for anxiety, anaemia in the Ayurveda. Our previous study reports for antidepressant property were very promising. This study aims to elucidate the antidepressant mechanisms of Drakshasava by examining its effects on key neurotransmitters and stress hormones, as well as observing related behavioral changes in Wistar rats under stress models. Methods: Wistar rats weighing 150-200 gms were divided into six groups consisting of 6 rats in each group. Two animal models, acute stress (AS) and unpredictable chronic mild stress (UCMS) were used. Drug treatment was given as per groups orally, Drakshasava in the dose of 2ml & 4ml/kg and Fluoxetine standard comparator 10mg/kg for next 7 days for AS. In UCMS group stress was given for 15 days and drug treatment was given along with the stress from day 15-21. Sucrose preference test (SPT) done on day 0 & 8 in AS and on day 0, 15, 22 in UCMS model rats and at the end Forced Swim test (FST) was performed. Blood withdrawal done for estimation of serum Dopamine, Serotonin and cortisol levels with ELISA kit on day 8 in AS & 22 in UCMS. Data obtained analysed with Graph Pad Prism 6. Result: Decrease in Dopamine (p<0.05) and Serotonin (p<0.01) while increase (p<0.01) in cortisol levels was seen in (depressed) disease control group rats in comparison with control group. Both doses of Drakshasava showed significant reduction in immobility time in FST and improved sucrose preference and was found to be effective in both the models of depression. Increase in serum serotonin (p<0.01) and dopamine (p<0.05) levels was evident while at the same time, (p<0.05) cortisol level reduction was seen in all drug treated rats. Findings observed in the FST and SPT were correlated with the biochemical findings. Effects seen with Drakshasava were comparable with that of Fluoxetine. Conclusion: Drakshasava increased serum serotonin and dopamine levels while decreasing cortisol levels in both acute and chronic animal models of depression. These effects were comparable to those observed with the standard antidepressant drug, Fluoxetine.