Melipona scutellaris Geopropolis: Chemical Composition and Bioactivity

Area of Science:

• Natural Products Chemistry
• Ethnobotany
• Pharmacology

Background:

• Geopropolis, a resinous substance collected by stingless bees, has a long history of traditional medicinal use.
• Understanding the seasonal variations in geopropolis composition and activity is crucial for its therapeutic application.

Purpose of the Study:

• To investigate the botanical origin, physicochemical properties, and biological activities of geopropolis from Melipona scutellaris.
• To compare geopropolis harvested during rainy and dry seasons.

Main Methods:

• Palynological analysis for botanical origin.
• High-Performance Liquid Chromatography (HPLC) for phenolic and flavonoid content.
• DPPH, reducing power, and beta-carotene assays for antioxidant capacity.
• Microdilution for antimicrobial activity.
• Enzyme inhibition assays for anti-inflammatory and acetylcholinesterase activity.
• Saccharomyces cerevisiae for antimutagenic activity.

Main Results:

• Predominant pollen types identified as Schinus terebinthifolius and Cecropia.
• Rainy-season geopropolis showed higher total phenol and flavonoid content.
• Superior antioxidant activity in rainy-season samples.
• Both seasons' geopropolis exhibited anti-inflammatory, antimutagenic, and antimicrobial properties, notably against Staphylococcus aureus.
• Significant acetylcholinesterase inhibition observed in both seasons.

Conclusions:

• Melipona scutellaris geopropolis exhibits diverse biological activities, including antioxidant, antimicrobial, anti-inflammatory, and antimutagenic effects.
• Seasonal variations influence the phytochemical profile and antioxidant capacity.
• Geopropolis holds therapeutic promise for inflammatory, oxidative, and infectious diseases.