Ultrasound-Assisted Pressurized Fluid Extraction of Antioxidant and Anticancer Molecules from a Mangaba, Cambuí and...

This study explored the antioxidant and anticancer potential of extracts obtained from the mangaba, cambuí, and red propolis blend. The extracts were obtained using ultrasound-assisted pressurized fluid extraction (UAPFE) at 50 bar, 60 °C, and a flow rate of 2 mL/min. Both sequential extraction with solvents of increasing polarity (propane followed by ethanol/water) and one-step extraction were employed for 30 min. Extracts were characterized by ultra-high-resolution mass spectrometry, total phenolic content, antioxidant activity (via DPPH and FRAP assays), and cytotoxicity using the sulforhodamine B colorimetric method. Among the tested conditions, the sequential extraction with ethanol/water (UAPFE-SE) yielded 16.2 ± 3.0% (overall extraction yield), with high phenolic content (24.1 ± 0.4 µg/mg). Mass spectrometry revealed the presence of antiproliferative phenolics. The UAPFE-SE extract demonstrated moderate antioxidant activity, with FRAP values of 394.0 ± 6.0 µg Fe²⁺/mg and DPPH scavenging capacity of 28.5 ± 0.3 µg Trolox equivalents/mg. Additionally, it exhibited cytotoxic inhibition of 82.3 ± 1.7% against lung carcinoma cells at a concentration of 100 μg/mL. The results suggest that the antioxidant properties and cytotoxic effect against lung cancer cells in vitro warrant further investigation to assess therapeutic potential.