French Propolis Caffeic Acid Derivatives Protect Skeletal Muscle from Oxidative Damages

Area of Science:

• Biochemistry
• Pharmacology
• Apiculture

Background:

• Propolis, a resinous mixture from honeybees (Apis mellifera), possesses diverse medicinal properties.
• Different propolis types within a hive serve specific functions and have unique compositions.
• Oxidative stress is implicated in various ailments, and natural compounds are explored for protection.

Purpose of the Study:

• To investigate the protective effects of different propolis types against hydrogen peroxide-induced oxidative injury in human skeletal muscle cells.
• To identify and characterize the active compounds responsible for cytoprotection in effective propolis types.
• To evaluate the potential of propolis and its constituents in preventing lipid peroxidation and their botanical origins.

Main Methods:

• Exposure of human skeletal muscle cells to hydrogen peroxide (H2O2) with different propolis types.
• Bio-guided fractionation of active propolis to isolate and identify key compounds.
• Assay of cell viability and lipid peroxidation levels.
• Chemical analysis of local flora for propolis precursor identification.

Main Results:

• Brood-protection propolis significantly prevented H2O2-induced loss of cell viability.
• Five major compounds (benzyl caffeate, CAPE, cinnamyl caffeate, prenyl caffeate, MBC) were identified, showing strong cytoprotective effects.
• Propolis extract and its compounds reduced lipid peroxidation in mouse skeletal muscle.
• Black poplar (Populus nigra) buds were identified as the likely botanical source.

Conclusions:

• Hive propolis exhibits functional diversity, with brood-protection propolis being particularly effective against oxidative stress.
• Identified caffeate derivatives are potent cytoprotective agents with potential therapeutic applications.
• Propolis holds promise for food preservation and complementary/preventive medicine due to its antioxidant properties.