Ginkgolide C (Diterpenoid)

Ginkgolide C is a diterpenoid compound extracted from Ginkgo biloba leaves that exhibits anti-inflammatory and neuroprotective properties. This bioactive terpenoid works primarily through modulation of inflammatory pathways and oxidative stress reduction in laboratory studies.

Origin & History

Ginkgolide C is a highly oxygenated diterpenoid lactone isolated from the leaves of Ginkgo biloba L., a tree native to China. It features a rigid hexacyclic C20 trilactone structure with a molecular weight of 440.398 and is extracted via standard phytochemical methods, though total chemical synthesis has been achieved in 26 steps.

Historical & Cultural Context

No information on historical or traditional medicinal uses of Ginkgolide C specifically is available. While it occurs naturally in Ginkgo biloba, sources provide no context regarding its role in traditional medicine systems.

Health Benefits

• Anti-inflammatory effects noted in preclinical studies (evidence quality: preliminary)
• Neuroprotective properties observed in laboratory settings (evidence quality: preliminary)
• No human clinical trials available to confirm health benefits
• No dosage-specific outcomes documented
• Further research needed to establish clinical efficacy

How It Works

Ginkgolide C exerts its effects by inhibiting pro-inflammatory cytokines including TNF-α and IL-1β while reducing nuclear factor-kappa B (NF-κB) activation. The compound also enhances antioxidant enzyme activity and protects against oxidative stress by scavenging reactive oxygen species. Additionally, it may modulate neuronal calcium channels and reduce neuroinflammatory responses in brain tissue.

Scientific Research

No human clinical trials, randomized controlled trials (RCTs), or meta-analyses specifically for Ginkgolide C have been conducted according to available sources. Current research focuses solely on isolation methods, structural characterization, and preclinical properties without any PubMed PMIDs for human trials provided.

Clinical Summary

Current evidence for Ginkgolide C is limited to preclinical laboratory studies and animal models. In vitro studies have demonstrated anti-inflammatory effects with reduced cytokine production, while animal studies show neuroprotective properties in models of brain injury. No human clinical trials have been conducted to establish therapeutic efficacy or optimal dosing. The preliminary evidence quality necessitates further research before clinical applications can be validated.

Nutritional Profile

Ginkgolide C is a bioactive diterpenoid lactone compound isolated from Ginkgo biloba, with a molecular formula of C20H24O11 and molecular weight of approximately 456.39 g/mol. It is not a macronutrient, micronutrient, or conventional food ingredient, and therefore contributes no caloric value, protein, fat, carbohydrate, fiber, vitamins, or dietary minerals. As a pure phytochemical compound, its profile is defined entirely by its bioactive structure: it contains a unique cage-like terpenoid skeleton with six five-membered rings and multiple lactone groups, distinguishing it from Ginkgolide A and B by the presence of three hydroxyl groups at C-1, C-3, and C-7 positions. Ginkgolide C is a potent platelet-activating factor (PAF) receptor antagonist, with inhibitory activity at nanomolar to micromolar concentrations (IC50 values reported in the range of 1–100 µM depending on assay conditions). It is typically found in Ginkgo biloba leaf extracts at trace concentrations, generally comprising a minor fraction of the total ginkgolide content (estimated <0.05% dry weight of standardized extracts). Bioavailability data specific to Ginkgolide C in humans is not established; however, related ginkgolides show moderate oral absorption with significant first-pass metabolism. It is lipophilic in nature, which may facilitate membrane permeability, but its complex polycyclic structure may limit rapid metabolic degradation.

Preparation & Dosage

No clinically studied dosage ranges, forms, or standardization details are available as no human clinical data exist for Ginkgolide C. Consult a healthcare provider before starting any new supplement.

Synergy & Pairings

Ginkgolide A, Ginkgolide B, Bilobalide, Ginkgo biloba extract

Safety & Interactions

Safety data for isolated Ginkgolide C is extremely limited due to lack of human studies. As a component of Ginkgo biloba extracts, it may theoretically increase bleeding risk when combined with anticoagulant medications like warfarin. Potential side effects may include gastrointestinal upset and headaches, though specific data for Ginkgolide C alone is unavailable. Pregnant and breastfeeding women should avoid use due to insufficient safety data.