Behavioural studies on BR-16A (Mentat), a herbal psychotropic formulation

Area of Science:

• Neuroscience
• Pharmacology
• Behavioral Science

Background:

• Mentat is a herbal formulation used clinically as an adjuvant for anxiety and depression.
• Standard behavioral paradigms are crucial for evaluating psychotropic drug effects.

Purpose of the Study:

• To investigate the anxiolytic, antidepressant, and anti-aggression activities of Mentat in rodent models.
• To correlate behavioral findings with neurochemical changes, specifically tribulin levels.

Main Methods:

• Subchronic administration of Mentat (50 and 100 mg/kg) in rats and mice.
• Behavioral tests included open-field, elevated plus-maze, social interaction, Vogel's drink conflict, Porsolt's behavioral despair, learned helplessness, and muricidal tests.
• Measurement of rat brain tribulin levels following pentylenetetrazole administration.

Main Results:

• Mentat exhibited dose-related anxiolytic effects in multiple tests, including reducing anxiety markers and attenuating pentylenetetrazole-induced tribulin increase.
• Mentat significantly reduced immobility in the behavioral despair test and improved performance in learned helplessness and muricidal tests, indicating antidepressant activity.
• The drug attenuated footshock-induced aggression but did not affect clonidine-induced automutilative behavior, suggesting aggression reduction may stem from anxiolytic properties.

Conclusions:

• Subchronic Mentat administration shows significant anxiolytic, antidepressant, and anti-aggression effects in animal models.
• These findings support the traditional use of Mentat as an adjuvant therapy for anxiety and depression.
• The study provides a preclinical basis for Mentat's efficacy in managing mood and anxiety disorders.