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Product : CA, Caffeic acid

Caffeic acid is a polyphenol antioxidant found in coffee, fruits, vegetables, and herbs. It may have anti-inflammatory, anticancer, anti-aging, and other health benefits.
Caffeic acid (CA) is a dietary hydroxycinnamic acid found widely in plant foods and in coffee largely as chlorogenic acids (caffeoylquinic acids). CA is generally antioxidant / anti-inflammatory and is frequently reported to modulate Nrf2 and NF-κB signaling, with downstream effects on survival pathways (PI3K/AKT), MAPKs, cell cycle, and apoptosis in preclinical cancer models. A notable mechanistic nuance is a context-dependent pro-oxidant effect described in the presence of copper (Cu), where CA can drive oxidative DNA damage in vitro (often discussed as potentially relevant to tumors with higher copper levels).

-Caffeic acid phenethyl ester, the main representative component of propolis
-Black chokeberry 141.14 mg/100 g F
-Sunflower seed, meal 8.17 mg/100 g FW
-Common sage, dried 26.40 mg/100 g FW
-Ceylan cinnamon 24.20 mg/100 g FW
-Nutmeg 16.30 mg/100 g FW

-Dual capacity of CA to act as an antioxidant during carcinogenesis and as a pro-oxidant against cancer cells, promoting their apoptosis or sensitizing them to chemotherapeutic drugs.

Pathways:
-Caffeic acid is a potent antioxidant
-Caffeic acid may also exhibit pro-oxidant behavior. At higher concentrations( 50–100 µM ?) or/and in the presence of transition metal ions (such as copper or iron), caffeic acid can participate in Fenton-like reactions, potentially leading to increased ROS generation.
-Shown to inhibit NF-κB activation
-Inhibitory effects on MAPK/ERK Pathway
-PI3K/Akt Signaling Pathway
-Activation of the Nrf2/ARE pathway
-Cell cycle arrest at various checkpoints
-Angiogenesis Inhibition

Caffeic acid typically shows low oral bioavailability (sometimes only a few percent of the ingested dose is systemically available) and a short plasma half-life (around 1–2 hours in animal models).

Rank Pathway / Axis Cancer Cells Normal Cells TSF Primary Effect Notes / Interpretation
1 NF-κB inflammatory transcription NF-κB ↓; cytokines/COX-2/iNOS programs ↓ (reported) Inflammation tone ↓ (common in injury models) R, G Anti-inflammatory / anti-survival transcription CA is frequently reported to reduce NF-κB signaling in inflammatory and cancer models. Note: CAPE (the ester) is the “stronger” canonical NF-κB inhibitor; keep CA claims qualified as “reported.”
2 Nrf2/ARE antioxidant response (HO-1, GSH systems) Stress adaptation modulation (context-dependent) Nrf2 ↑; HO-1 ↑; antioxidant defenses ↑ R, G Endogenous antioxidant upshift CA can activate Nrf2/ARE programs in oxidative stress settings; tumor direction is model-dependent and should not be overstated as uniformly “good” or “bad.”
3 ROS / redox tone (antioxidant vs Cu-linked pro-oxidant) ROS direction variable; pro-oxidant DNA damage reported with Cu (context) Oxidative injury ↓ in many stress models P, R, G Redox modulation CA is classically antioxidant, yet Cu-mediated pro-oxidant DNA breakage has been described in vitro; treat as conditional (metal availability, dose, cell type).
4 Intrinsic apoptosis (mitochondrial/caspase linked) Apoptosis ↑; Bax ↑; caspases ↑ (reported) ↔ (generally less activation) G Cell death execution Frequently observed downstream endpoint in tumor models, often coupled to NF-κB/PI3K/MAPK and stress/redox changes.
5 Cell-cycle control (Cyclins/CDKs; checkpoints) Cell-cycle arrest ↑ (reported; phase varies) ↔ G Cytostasis Often appears as later phenotype-level outcome after upstream signaling shifts.
6 PI3K → AKT (± mTOR) survival axis PI3K/AKT ↓ (reported; model-dependent) ↔ R, G Growth/survival modulation Reported in multiple tumor systems; best kept as “reported/model-dependent,” not a primary direct target.
7 MAPK re-wiring (ERK / JNK / p38) MAPK modulation (context-dependent) ↔ P, R, G Stress/mitogenic signaling adjustment Directions vary across models and doses; avoid fixed arrows without a specific cited study for your cancer type.
8 Invasion / metastasis programs (MMPs / EMT) MMPs ↓; migration/invasion ↓ (reported) ↔ G Anti-invasive phenotype Often downstream of NF-κB/MAPK and inflammation changes; not universal across all cell lines.
9 Angiogenesis signaling (VEGF & related outputs) VEGF / angiogenic outputs ↓ (reported) ↔ G Anti-angiogenic support Later phenotype-level outcome; strength depends on model and exposure.
10 Bioavailability / metabolism constraint (chlorogenic acids → conjugates) Systemic exposure mostly as glucuronide/sulfate/methylated metabolites — — Translation constraint After oral intake, CA/chlorogenic acids appear predominantly as conjugated metabolites; free CA levels are typically far below many in-vitro (µM) assay doses.

Time-Scale Flag (TSF): P / R / G





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