Ginkgetin / Casp3 Cancer Research Results

Gink, Ginkgetin: Click to Expand ⟱
Features:

Ginkgetin — a naturally occurring biflavonoid, specifically a dimethylated derivative of amentoflavone, found in Ginkgo biloba and several other plants. It is chemically and pharmacologically distinct from generic Ginkgo biloba extract, EGb 761, ginkgolides, bilobalide, and ginkgolic acids. Ginkgetin has predominantly preclinical anticancer evidence, with reported effects on ferroptosis, apoptosis, cell-cycle arrest, proliferation, invasion, angiogenesis, and chemotherapy sensitivity. Major signaling systems reported to be modulated include NRF2/HO-1, JAK/STAT, PI3K/AKT/GSK-3β, MAPK, Wnt/β-catenin, and TFEB-associated ferroptotic signaling. It should be treated as an isolated natural-product constituent rather than as evidence for the pharmacological effects of ordinary Ginkgo supplementation.

Ginkgetin — a naturally occurring biflavonoid, specifically a 3′→8″-linked biflavone and dimethylated derivative of amentoflavone, with the synonym 7,4′-dimethylamentoflavone. It is a small-molecule plant polyphenol rather than a Ginkgo extract and is commonly abbreviated GK. Ginkgetin occurs in Ginkgo biloba leaves and several other plant species. It is chemically and pharmacologically distinct from generic Ginkgo biloba extract, EGb 761, ginkgolides, bilobalide, and ginkgolic acids. Current evidence is predominantly preclinical and supports treating Ginkgetin as a separate isolated natural-product constituent rather than extrapolating its effects to ordinary Ginkgo supplementation.

Primary mechanisms (ranked):

  1. Induction of Ferroptosis through TFEB activation and TFEB–TRIM25-dependent GPX4 ubiquitination and lysosomal degradation, producing loss of GPX4-mediated lipid-peroxide defense.
  2. Disruption of NRF2/HO-1 antioxidant signaling with SLC7A11/GPX4 suppression, GSH depletion, Fe²⁺ accumulation, lipid peroxidation, and increased oxidative stress, particularly during cisplatin treatment.
  3. Suppression of oncogenic JAK2/STAT3 signaling, including SHP-1/PTEN-associated inhibition of STAT3 phosphorylation, proliferation, survival, and tumorigenic signaling.
  4. Suppression of metastatic EMT through AKT/GSK-3β/Snail and Wnt/β-catenin signaling, reducing migration and invasion in experimental lung-cancer models.
  5. Induction of apoptotic signaling through mitochondrial dysfunction, Bax/Bcl-2 modulation, caspase activation, PARP cleavage, and context-dependent MAPK activation.
  6. ROS/H₂O₂-mediated cytotoxicity, with rapid oxidative stress contributing to caspase-dependent apoptosis in susceptible cancer cells.
  7. Cell-cycle inhibition, including G2/M arrest and suppression of proliferative Wnt target genes such as cyclin D1 and survivin.
  8. Anti-angiogenic activity through inhibition of VEGF/VEGFR2-associated AKT, eNOS, ERK, MMP-2, and MMP-9 signaling in experimental vascular models.
  9. Chemosensitization, particularly increased cisplatin responsiveness in experimental lung and cisplatin-resistant cervical cancer through ferroptotic and redox mechanisms.

Bioavailability / PK relevance: Ginkgetin is highly lipophilic and poorly water-soluble, creating an important oral-delivery limitation. Human pharmacokinetic data for isolated Ginkgetin are essentially absent, and no validated human anticancer plasma target or therapeutic dose has been established. Experimental formulation work, including nanomicelles, is being investigated specifically to improve its systemic exposure. Ginkgetin is also a potent in-vitro inhibitor of UGT1A1, creating a potential drug-interaction concern if pharmacologically relevant systemic concentrations can be achieved.

In-vitro vs systemic exposure relevance: Most anticancer studies use isolated Ginkgetin at micromolar concentrations, commonly over prolonged exposures. These concentrations cannot presently be assumed achievable through oral Ginkgo products or conventional Ginkgetin administration because human Cmax data are unavailable and oral bioavailability is poorly characterized. Thus, direct translation of micromolar cell-culture effects to dietary or supplemental Ginkgo exposure is weak.

Clinical evidence status: Preclinical only. Evidence includes cancer-cell studies and multiple mouse xenograft or metastasis models, including lung, breast, prostate, medulloblastoma, and cervical-cancer systems. No established human anticancer trials, approved anticancer indication, validated clinical dose, or demonstrated human therapeutic efficacy was identified. FDA substance registration provides a chemical identifier but does not constitute regulatory approval.

Ginkgetin Cancer-Relevant Mechanisms

Rank Pathway / Axis Cancer Cells Normal Cells TSF Primary Effect Notes / Interpretation
1 STAT3 survival signaling STAT3 phosphorylation ↓; nuclear STAT3 ↓; STAT3-dependent survival signaling ↓ Not established R, G Proliferation ↓; apoptosis ↑ Among the best independently replicated Ginkgetin mechanisms. South Korean studies support inhibition of constitutive and inducible STAT3 signaling in prostate cancer and hematologic cancer models.
2 Caspase and mitochondrial apoptosis Caspase-3 ↑; caspase-8 ↑; caspase-9 ↑; Bax ↑; Bcl-2 ↓; Bcl-xL ↓; survivin ↓; apoptosis ↑ Apoptosis effects context-dependent R, G Programmed cell death Supported across multiple cancer models and geographically independent laboratories. ROS-dependent caspase activation was demonstrated in an early Taiwanese ovarian-cancer study.
3 Cell-cycle regulation G2 arrest ↑; cyclin D1 ↓; proliferation ↓ Not established G Cytostatic growth inhibition Independent South Korean colorectal-cancer work demonstrated dose-dependent growth inhibition and G2-phase arrest. Other tumor models also report cell-cycle suppression.
4 ROS and hydrogen peroxide stress ROS ↑; H₂O₂ ↑; oxidative DNA damage ↑ ROS may ↓ (context-dependent) P, R Oxidative stress-mediated apoptosis In ovarian adenocarcinoma cells, intracellular H₂O₂ increased within approximately 30 minutes; catalase and antioxidant pretreatment partially reduced DNA damage and cytotoxicity. This provides geographically independent evidence predating recent ferroptosis studies.
5 NRF2 HO-1 SLC7A11 GPX4 ferroptosis NRF2 ↓; HO-1 ↓; SLC7A11 ↓; GPX4 ↓; GSH ↓; Fe²⁺ ↑; lipid peroxidation ↑; ferroptosis ↑ NRF2 may ↑ in nonmalignant injury models (context-dependent) R, G Ferroptotic cell death and chemosensitization Strong mechanistic evidence exists in lung and cervical-cancer models, particularly with cisplatin, but this evidence is presently concentrated in mainland Chinese research groups and has limited geographically independent replication.
6 TFEB TRIM25 GPX4 lysosomal degradation TFEB activation ↑; TRIM25-mediated GPX4 ubiquitination ↑; GPX4 lysosomal degradation ↑; ferroptosis ↑ Not established R, G Ferroptosis Recent mechanistically detailed pathway in EGFR wild-type lung adenocarcinoma. Potentially important, but independent replication is currently limited; therefore ranked below the more broadly replicated STAT3, apoptosis, cell-cycle, and ROS mechanisms.
7 Wnt β-catenin and EMT signaling Wnt β-catenin signaling ↓; Snail ↓; EMT ↓; migration ↓; invasion ↓ Not established R, G Metastatic phenotype suppression Supported in medulloblastoma and lung-cancer models. Evidence is biologically coherent but remains more geographically concentrated than the higher-ranked mechanisms.
8 AKT GSK-3β Snail signaling AKT signaling ↓; GSK-3β-associated EMT signaling ↓; Snail ↓; migration ↓; invasion ↓ Not established R, G Migration and invasion ↓ Primarily supported by lung adenocarcinoma studies. Closely overlaps with Wnt and EMT modulation and should be interpreted as a context-dependent metastatic signaling mechanism.
9 Estrogen receptor and PFKFB3 signaling ERα signaling ↓; PFKFB3-associated survival signaling ↓; viability ↓ Not established G ER-positive breast-cancer growth inhibition Supported by an independent South Korean study in MCF-7 and T-47D breast-cancer cells. Likely tumor-subtype specific rather than a universal Ginkgetin mechanism.
10 VEGF VEGFR2 angiogenic signaling Angiogenesis ↓ VEGFR2 signaling ↓; AKT ↓; eNOS ↓; ERK ↓; MMP-2 ↓; MMP-9 ↓ R, G Anti-angiogenic activity Experimental endothelial and tumor models support anti-angiogenic activity, but independent geographic replication is limited and some evidence involves combination treatment.
11 Cisplatin chemosensitization Cisplatin sensitivity ↑; ferroptosis ↑; apoptosis ↑ Normal-tissue selectivity not established G Drug-response enhancement Preclinical lung and cervical-cancer studies indicate increased cisplatin responsiveness, principally through ferroptotic and redox pathways. No human clinical validation has been established.
12 Clinical Translation Constraint Effective experimental exposure generally micromolar; human therapeutic exposure unknown Potential metabolic drug interactions; normal-tissue exposure insufficiently characterized G Limits clinical extrapolation Poor aqueous solubility, uncertain human bioavailability, absence of validated human pharmacokinetic targets, geographic concentration of several newer mechanistic findings, and lack of clinical cancer trials substantially limit translation.

TSF: P: 0–30 min     R: 30 min–3 hr     G: >3 hr
Casp3, CPP32, Cysteinyl aspartate specific proteinase-3: Click to Expand ⟱
Source:
Type:
Also known as CP32.
Cysteinyl aspartate specific proteinase-3 (Caspase-3) is a common key protein in the apoptosis and pyroptosis pathways, and when activated, the expression level of tumor suppressor gene Gasdermin E (GSDME) determines the mechanism of tumor cell death.
As a key protein of apoptosis, caspase-3 can also cleave GSDME and induce pyroptosis. Loss of caspase activity is an important cause of tumor progression.
Many anticancer strategies rely on the promotion of apoptosis in cancer cells as a means to shrink tumors. Crucial for apoptotic function are executioner caspases, most notably caspase-3, that proteolyze a variety of proteins, inducing cell death. Paradoxically, overexpression of procaspase-3 (PC-3), the low-activity zymogen precursor to caspase-3, has been reported in a variety of cancer types. Until recently, this counterintuitive overexpression of a pro-apoptotic protein in cancer has been puzzling. Recent studies suggest subapoptotic caspase-3 activity may promote oncogenic transformation, a possible explanation for the enigmatic overexpression of PC-3. Herein, the overexpression of PC-3 in cancer and its mechanistic basis is reviewed; collectively, the data suggest the potential for exploitation of PC-3 overexpression with PC-3 activators as a targeted anticancer strategy.
Caspase 3 is the main effector caspase and has a key role in apoptosis. In many types of cancer, including breast, lung, and colon cancer, caspase-3 expression is reduced or absent.
On the other hand, some studies have shown that high levels of caspase-3 expression can be associated with a better prognosis in certain types of cancer, such as breast cancer. This suggests that caspase-3 may play a role in the elimination of cancer cells, and that therapies aimed at activating caspase-3 may be effective in treating certain types of cancer.
Procaspase-3 is a apoptotic marker protein.
Prognostic significance:
• High Cas3 expression: Associated with good prognosis and increased sensitivity to chemotherapy in breast, gastric, lung, and pancreatic cancers.
• Low Cas3 expression: Linked to poor prognosis and increased risk of recurrence in colorectal, hepatocellular carcinoma, ovarian, and prostate cancers.
Scientific Papers found: Click to Expand⟱
7256- Gink,    Neuroprotective effect of ginkgetin in experimental cerebral ischemia/reperfusion via apoptosis inhibition and PI3K/Akt/mTOR signaling pathway activation
- in-vivo, Stroke, NA
*Stroke↓, *Apoptosis↓, *Casp3↓, *BAX↓, *Bcl-2↑, *p‑Akt↑, *p‑mTOR↑,

Showing Research Papers: 1 to 1 of 1

* indicates research on normal cells as opposed to diseased cells
Total Research Paper Matches: 1

Pathway results for Effect on Cancer / Diseased Cells:


Total Targets: 0

Pathway results for Effect on Normal Cells:


NA, unassigned(tgid=0) ⓘ

Stroke↓, 1,  

Cell Death(tgid=5) ⓘ

p‑Akt↑, 1,   Apoptosis↓, 1,   BAX↓, 1,   Bcl-2↑, 1,   Casp3↓, 1,  

Proliferation, Differentiation & Cell State(tgid=12) ⓘ

p‑mTOR↑, 1,  
Total Targets: 7

Scientific Paper Hit Count for: Casp3, CPP32, Cysteinyl aspartate specific proteinase-3
Query results interpretion may depend on "conditions" listed in the research papers.
Such Conditions may include : 
  -low or high Dose
  -format for product, such as nano of lipid formations
  -different cell line effects
  -synergies with other products 
  -if effect was for normal or cancerous cells

Filter Conditions: Pro/AntiFlg:%  IllCat:%  CanType:%  Cells:%  prod#:437  Target#:42  State#:%  Dir#:1
  wNotes=0  sortOrder:rid,rpid

 

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