Ajoene (compound of Garlic) / Casp3 Cancer Research Results

Ajoene, Ajoene (compound of Garlic): Click to Expand ⟱
Features:
Ajoene is a compound found in garlic, specifically in the oil extracted from crushed garlic cloves. It has been studied for its potential anti-cancer properties. Research suggests that ajoene may have several mechanisms by which it can inhibit the growth of cancer cells and induce apoptosis (cell death).

Ajoene — an organosulfur secondary metabolite formed from garlic (Allium sativum) after crushing/processing (an allicin-derived transformation product; typically present as E/Z isomers). It is a thiol-reactive small molecule (vinyl-disulfide sulfoxide motif) studied mainly as a cytotoxic/anti-migratory agent in cancer models and as a topical antifungal. Classification: small-molecule natural product (garlic organosulfur compound). Abbreviation(s): none universally standard; often specified as E-ajoene / Z-ajoene.

Primary mechanisms (ranked):

  1. Protein cysteine modification (S-thiolation / covalent adduct formation on thiol-containing targets), with downstream disruption of signaling and cytoskeletal programs
  2. Pro-oxidant stress in cancer cells (ROS/H2O2 increase, redox-thiol perturbation) that can trigger intrinsic mitochondrial apoptosis
  3. Cell-cycle perturbation (commonly G2/M arrest) and microtubule/cytoskeletal interference (model-dependent; isomer-dependent)
  4. Anti-migration/anti-invasion phenotypes linked to intermediate filament (vimentin) network remodeling (context-dependent)
  5. Secondary: NRF2-driven antioxidant response induction in some non-malignant/epithelial contexts (dose- and context-dependent)

Bioavailability / PK relevance: Systemic human PK is poorly defined; ajoene is typically discussed as an allicin-derived downstream product and allicin itself is not detected in human serum after raw garlic ingestion in classic studies. Practical translation in oncology is therefore most credible for local/topical exposure or for optimized analogues; oral dietary exposure may not reproduce common in-vitro micromolar conditions reliably.

In-vitro vs systemic exposure relevance: Many anticancer studies use ~low–tens of µM in vitro; whether these levels are achievable systemically from diet/supplements is uncertain. Topical delivery can reach higher local concentrations (e.g., skin lesions/fungal infections), and small human topical studies exist.

Clinical evidence status: Predominantly preclinical (cell culture and animal models). Small human topical evidence exists for basal cell carcinoma tumor shrinkage and for fungal skin infections (e.g., tinea pedis; chromoblastomycosis). No robust systemic oncology RCT evidence.

Approximate ajoene content values for different parts of the garlic plant:
Garlic bulbs: 1-5 mg of ajoene per clove
Garlic scapes (green shoots): 0.5-2 mg of ajoene per 100g
Garlic chives (leaves): 0.5-2 mg of ajoene per 100g
Garlic microgreens: 1-5 mg of ajoene per 100g

μM concentrations of ajoene that have been reported to exhibit biological activity:
Antimicrobial activity: 1-10 μM
Antioxidant activity: 1-50 μM
Anti-inflammatory activity: 5-20 μM
Anticancer activity: 10-50 μM
Cardiovascular health: 5-20 μM

Approximate unverified μM concentrations of ajoene that can be achieved with different amounts of garlic or garlic chives:
1 clove of garlic (3g): approximately 1-5 μM of ajoene
1 tablespoon of minced garlic (15g): approximately 5-15 μM of ajoene
1 cup of chopped garlic (100g): approximately 30-60 μM of ajoene
1 tablespoon of chopped garlic chives (15g): approximately 0.5-2 μM of ajoene
1 cup of chopped garlic chives (100g): approximately 5-10 μM of ajoene
1 ounce (28g) of garlic microgreens: approximately 10-30 μM of ajoene
1 cup of garlic microgreens (100g): approximately 30-60 μM of ajoene
1 ounce (28g) of garlic chive microgreens: approximately 5-15 μM of ajoene
1 cup of garlic chive microgreens (100g): approximately 15-30 μM of ajoene

Ajoene — mechanistic axes relevant to oncology translation

Rank Pathway / Axis Cancer Cells Normal Cells TSF Primary Effect Notes / Interpretation
1 Protein thiol reactivity and covalent cysteine targeting ↑ thiol stress; ↑ protein adducts (model-dependent) ↔ to ↑ adaptive antioxidant response (context-dependent) P/R Upstream “initiator” chemistry that can rewire multiple pathways Consistent with ajoene acting as a thiol-reactive electrophile; downstream effects vary by target set and exposure.
2 ROS and peroxide signaling ↑ ROS/H2O2 (dose-dependent); ↑ oxidative damage (high concentration only) ↔ or ↑ cytoprotective programs (dose-dependent) P Oxidative stress–linked cytotoxicity in susceptible cancer models Classic leukemia data show apoptosis accompanied by ROS and NF-κB activation; magnitude and direction can be model- and dose-dependent.
3 Mitochondria and intrinsic apoptosis ↑ mitochondrial apoptosis; ↑ caspase cascade (model-dependent) ↔ (selectivity reported in some systems) R/G Execution of cell death following redox/thiol perturbation Topical basal cell carcinoma (BCC) work supports mitochondria-dependent apoptosis signaling in vivo/ex vivo.
4 NF-κB signaling ↑ NF-κB activity (model-dependent) P/R Stress-response transcriptional program NF-κB activation can be pro-survival or pro-death depending on context; in some ajoene models it co-occurs with apoptosis rather than preventing it.
5 Cell cycle control and microtubule/cytoskeleton dynamics ↑ G2/M arrest (model-dependent); ↓ proliferation R/G Anti-proliferative cytostasis/cytotoxicity Reported links include microtubule interference and mitotic blockade; may vary by isomer and cellular background.
6 Invasion and migration and vimentin intermediate filaments ↓ invasion/migration (requires vimentin); ↑ vimentin remodeling (context-dependent) G Anti-metastatic phenotype in vitro Non-cytotoxic ajoene concentrations can remodel vimentin networks and suppress invasion/migration in vimentin-positive models.
7 NRF2 antioxidant response (secondary) ↔ to ↑ NRF2 targets (context-dependent) ↑ NRF2-driven cytoprotection (context-dependent) R/G Adaptive redox buffering Ajoene can activate NRF2 and induce glutathione-related enzymes in hepatic/epithelial models; this may oppose pro-oxidant cytotoxicity at lower stress levels.
8 Chemosensitization ↑ apoptosis with chemotherapy (model-dependent) Unknown R/G Potential adjunct effect Reported in leukemia models (including more resistant compartments) but not established clinically for systemic cancer therapy.
9 Clinical Translation Constraint Systemic exposure likely limited/variable from diet; many in-vitro studies use µM levels; isomer mixture and chemical stability complicate reproducibility; best-supported human data are topical (skin/fungal indications). Safety constraint: antiplatelet activity raises bleeding-risk concerns with anticoagulants/antiplatelets. Feasibility boundary Translation most plausible for topical/local delivery or for engineered analogues with validated blood stability and exposure.


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⟱
5341- Ajoene,    Ajoene (natural garlic compound): a new anti-leukaemia agent for AML therapy
- Review, AML, NA
eff↑, AntiThr↑, Bacteria↓, LDH↓, TumCP↓, TumCCA↑, Bcl-2↓, Cyt‑c↑, Casp3↑,

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:


Core Metabolism/Glycolysis

LDH↓, 1,  

Cell Death

Bcl-2↓, 1,   Casp3↑, 1,   Cyt‑c↑, 1,  

Transcription & Epigenetics

AntiThr↑, 1,  

Cell Cycle & Senescence

TumCCA↑, 1,  

Migration

TumCP↓, 1,  

Drug Metabolism & Resistance

eff↑, 1,  

Clinical Biomarkers

LDH↓, 1,  

Infection & Microbiome

Bacteria↓, 1,  
Total Targets: 10

Pathway results for Effect on Normal Cells:


Total Targets: 0

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#:196  Target#:42  State#:%  Dir#:2
wNotes=0 sortOrder:rid,rpid

 

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