# Influence of Extraction Method on the Bioactivity of Pistacia vera L. Extracts: Metabolic and Gene Expression Changes in Colorectal Cancer Cells

## TL;DR

This study compares green and traditional extraction methods for pistachio extracts and their effects on colorectal cancer cells, showing differences in composition and biological activity.

## Contribution

The study reveals how ultrasound-assisted extraction alters extract composition and affects cancer cell metabolism and gene expression.

## Key findings

- UAE-derived extracts rich in carbohydrates increased cell proliferation after 72 hours.
- Classical extraction upregulated HMOX-1, indicating antioxidant defense activation.
- UAE downregulated GLUT2 and modulated cytokine transcripts, suggesting immunometabolic changes.

## Abstract

Sustainable extraction methods represent a key strategy in green chemistry and nutraceutical development, aiming to replace conventional solvent-based techniques while maintaining extract quality and safety. This study compared pistachio (Pistacia vera L.) extracts obtained by Ultrasound-Assisted Extraction (UAE) and a classical solvent-based protocol, focusing on compositional features and biological effects. Extracts were characterized for their chemical profiles, and their impact on HCT-116 colon-derived cells was evaluated through viability assays and gene expression analysis. The UAE-derived extract, richer in carbohydrates, promoted higher cell proliferation after 72 h, whereas the classical extract upregulated HMOX-1, suggesting activation of antioxidant defense pathways. Moreover, UAE treatment downregulated GLUT2 expression while modulating cytokinestranscripts, indicating a possible carbohydrate-driven immunometabolic response. Overall, these findings highlight both the advantages and limitations of green extraction approaches: while environmentally sustainable and efficient, ultrasound-assisted protocols may modify extract composition in ways that influence biological responses. Optimization of extraction parameters is therefore essential to ensure a balance between ecological sustainability, compositional integrity, and biological safety.