Orientin improves depression-like behavior and BDNF in chronic stressed mice

Area of Science:

• Neuroscience
• Pharmacology
• Biochemistry

Background:

• Oxidative stress is linked to chronic stress-induced depression, affecting neurotransmission and neuroplasticity.
• Orientin, a phenolic compound found in plants, possesses antioxidant properties.
• Investigating orientin's antidepressant potential is crucial for managing stress-related mood disorders.

Purpose of the Study:

• To evaluate the antidepressant-like effects of orientin in a mouse model of chronic stress.
• To elucidate the underlying mechanisms, including effects on oxidative stress, neurotransmission, and neuroplasticity.

Main Methods:

• A chronic unpredictable mild stress (CUMS) model was employed in mice.
• Mice were treated with orientin (20 and 40 mg/kg) orally for three weeks.
• Behavioral tests and biochemical analyses of brain tissue were conducted.

Main Results:

• Orientin administration significantly alleviated depression-like behaviors in CUMS mice.
• Treatment attenuated oxidative stress markers in the hippocampus and prefrontal cortex.
• Orientin increased levels of neurotransmitters (serotonin, norepinephrine), brain-derived neurotrophic factor, and synapse-associated proteins.

Conclusions:

• Orientin demonstrates significant antidepressant-like effects in a CUMS mouse model.
• The mechanisms involve mitigating central oxidative stress and enhancing neurotransmission and neuroplasticity.
• Orientin-rich foods may serve as a preventive strategy against chronic stress-induced depression.