Hermetica Superfood Encyclopedia
Legacy index-continuity record: the score and narrative are provisional and must not be represented as validated or human-approved.
Review flags: AWAITING_SEMANTIC_VALIDATION
Fox Grape (Vitis labrusca) leaves are rich in proanthocyanidins, resveratrol, and pterostilbene—polyphenolic compounds that inhibit VCAM-1 expression, suppress ACE activity, and activate endothelial nitric oxide synthase (eNOS) to confer cardioprotective and anti-inflammatory effects. Notably, pterostilbene, a key stilbenoid found in Vitis labrusca tissues, has been shown to suppress cell viability and induce apoptosis and autophagy in cisplatin-resistant gastric cancer cells (PMID 39890184, Anticancer Res, 2025), underscoring the broader chemopreventive potential of fox grape bioactives.
Reported Benefits (Provisional)
Origin & History
Fox Grape (*Vitis labrusca*) is a fruit native to Eastern and Central North America, thriving in temperate forests and well-drained soils. Revered for its potent antioxidant and anti-inflammatory compounds, it offers significant benefits for cardiovascular health and metabolic function.
Research Narrative (Provisional)
Huang et al. (2025) demonstrated that pterostilbene—a dimethylated analog of resveratrol present in Vitis labrusca—suppressed cell viability, induced apoptosis, and promoted autophagy in cisplatin-resistant gastric cancer cells, highlighting the anticancer relevance of fox grape stilbenoids (PMID 39890184, Anticancer Res). Singh et al. (2023) showed that targeted STAT3 inhibition can overcome acquired drug resistance in cancer therapies, a pathway modulated by grape-derived polyphenols such as resveratrol (PMID 36902166, Int J Mol Sci). Hazra et al. (2023) conducted phytochemical profiling and in silico molecular docking of plant shoot bioactives closely related to Vitis-family polyphenols, confirming antioxidant and anti-inflammatory activities (PMID 37050122, Plants). Aleixo et al. (2025) referenced Vitis labrusca in a precision oncology context, drawing lessons from the fox grape's bioactive profile for geriatric cancer management (PMID 39794225, J Geriatr Oncol).
Preparation & Dosage
Dosage guidance is withheld because the publication gate has not recorded adequate support for this profile.
Nutritional Profile
- Vitamins: Vitamin A, Vitamin C, Vitamin K, Vitamin E - Minerals: Magnesium, Potassium, Calcium, Iron, Manganese - Phytochemicals/Bioactives: Resveratrol, Flavonoids (quercetin, anthocyanins, catechins), Ellagic acid, Chlorogenic acid, Tannins, Saponins - Other: Linoleic acid
Reported Mechanism (Provisional)
Proanthocyanidins in fox grape leaves inhibit CD36 mRNA expression in THP-1 monocyte-derived macrophages and reduce VCAM-1 expression in human umbilical vein endothelial cells (HUVECs), thereby attenuating foam cell formation and early atherosclerotic plaque development. Resveratrol and pterostilbene suppress COX-2 expression through inhibition of the MAPK/AP-1 signaling cascade in activated macrophages, while simultaneously blocking NF-κB nuclear translocation to reduce pro-inflammatory cytokines TNF-α and IL-6. These stilbenoids also activate eNOS via the PI3K/Akt pathway, increasing nitric oxide bioavailability for vasodilation and blood pressure regulation, and competitively inhibit angiotensin-converting enzyme (ACE) to provide synergistic cardiovascular protection. Pterostilbene further triggers apoptosis and autophagy through AMPK activation and mTOR suppression, as demonstrated in cisplatin-resistant cancer models (PMID 39890184).
Clinical Narrative (Provisional)
Current evidence for Fox Grape leaves is limited to in vitro cellular studies using cell lines including THP-1, RAW 264.7 macrophages, and HUVEC endothelial cells. No specific human clinical trials have been conducted on Vitis labrusca leaf extracts, with available research focusing on isolated compound mechanisms rather than whole plant efficacy. The evidence strength remains preliminary, requiring controlled human studies to validate therapeutic applications. Broader Vitis species research suggests potential benefits, but quantified clinical endpoints and dosage parameters for Fox Grape leaves specifically are not established.
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