Convolvulus pluricaulis extract can modulate synaptic plasticity in rat brain hippocampus

Area of Science:

• Neuroscience
• Pharmacology
• Ethnobotany

Background:

• Convolvulus pluricaulis is an Indian traditional herb with documented memory-boosting properties.
• Synaptic plasticity, including long-term potentiation (LTP) and long-term depression (LTD), is crucial for memory formation.
• The specific effects of C. pluricaulis on synaptic plasticity remain uninvestigated.

Purpose of the Study:

• To investigate the effect of Convolvulus pluricaulis plant extract on hippocampal synaptic plasticity (LTP and LTD).
• To evaluate the impact of C. pluricaulis on memory retention using behavioral tests.
• To explore the role of scopoletin, an active compound, in mediating these effects.

Main Methods:

• Adult male Wistar rats were orally administered C. pluricaulis extract (250, 500, 1000 mg/kg) for 4 weeks.
• Electrophysiological recordings assessed LTP and LTD in the hippocampal CA1 region.
• Behavioral tests, including contextual fear conditioning (CFC) and novel object recognition test (NORT), evaluated memory retention.
• Ex-vivo electrophysiology was performed with scopoletin.

Main Results:

• A dose of 500 mg/kg C. pluricaulis extract significantly enhanced LTP.
• The same dose effectively reduced LTD.
• Behavioral tests showed improved memory retention, indicated by increased fear response in CFC and enhanced object recognition in NORT.
• Scopoletin administration mimicked the observed changes in synaptic plasticity.

Conclusions:

• Convolvulus pluricaulis extract, at a specific dose, augments memory functions in healthy animals.
• The herb modulates hippocampal synaptic plasticity, contributing to its memory-enhancing effects.
• Scopoletin is identified as a key active molecule responsible for these neuroplastic changes.