| Sep 15, 2025 |
Editing a single gene unlocks cleaner resveratrol production
Scientists edited grape cells with CRISPR to boost resveratrol output, offering a cleaner and more sustainable alternative to chemical synthesis and fermentation.
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(Nanowerk News) Resveratrol, a plant compound often linked to anti-inflammatory, anti-aging, and anti-cancer effects, has been notoriously difficult to produce at scale. It occurs naturally in small amounts in grapes, peanuts, and knotweed. Commercial supply has struggled because chemical synthesis introduces impurities, microbial fermentation reduces its activity, and extracting it from plants demands extensive resources. These barriers have pushed scientists toward genetic engineering to find cleaner and more efficient ways of producing the compound.
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Researchers from the Fujian Academy of Agricultural Sciences and Shanghai Jiao Tong University have now taken a major step forward. In a study published in Horticulture Research ("CRISPR/Cas9-mediated CHS2 mutation provides a new insight into resveratrol biosynthesis by causing a metabolic pathway shift from flavonoids to stilbenoids in Vitis davidii cells"), the team used CRISPR/Cas9 gene editing to reprogram grape cells for higher resveratrol output.
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The scientists targeted a gene called CHS2, which normally drives flavonoid production, the pathway responsible for pigments like anthocyanins. By knocking out CHS2, they were able to suppress flavonoid synthesis and redirect the cell’s resources toward stilbenoids—the family of compounds that includes resveratrol.
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The team created two grape cell lines of Vitis davidii with CHS2 mutations. The edits disrupted protein translation, effectively shutting down the gene. As expected, the modified cells showed less pigmentation, a sign that flavonoid pathways had been reduced. Sequencing confirmed that one line achieved nearly complete CHS2 knockout.
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When the researchers analyzed the chemistry of the cells, the shift was striking. Levels of 72 flavonoid compounds dropped sharply, while resveratrol and related compounds such as piceid and pterostilbene rose significantly. Resveratrol levels reached more than four times those found in wild-type cells, while piceid increased more than fivefold. Gene expression analysis reinforced the pattern: flavonoid-related genes were downregulated, while genes tied to stilbenoid production were strongly upregulated.
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“By knocking out CHS2, we effectively shifted the balance of grape cell metabolism toward resveratrol accumulation,” said Dr. Gongti Lai, the study’s lead author. “This approach offers a cleaner and more sustainable method for generating resveratrol compared with conventional production routes.”
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The findings suggest gene editing could provide a practical and scalable alternative to current supply methods. By rerouting metabolic pathways, the researchers not only boosted resveratrol yields but also demonstrated how plant cells can be engineered into efficient “factories” for valuable natural products.
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If scaled, this strategy could strengthen supply chains for pharmaceuticals, cosmetics, and health supplements that rely on resveratrol. More broadly, it points to the potential of precision gene editing to tailor plant metabolism, enhancing beneficial compounds while reducing less desirable traits. Such techniques could accelerate the development of new crops and bio-based platforms with both economic and health benefits.
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