Hydroxycinnamic-acid / HO-1 Cancer Research Results

HCAs, Hydroxycinnamic-acid: Click to Expand ⟱
Features:
Hydroxycinnamic acid compounds (p-coumaric, caffeic acid (CA), ferulic acid) occur most frequently as simple esters with hydroxy carboxylic acids or glucose, while the hydroxybenzoic acid compounds (p-hydroxybenzoic, gallic acid, ellagic acid) are present mainly in the form of glucosides. https://www.sciencedirect.com/topics/chemistry/hydroxycinnamic-acid
Hydroxycinnamic acids (HCAs) are plant-derived phenolic acids (including caffeic, ferulic, p-coumaric, and sinapic acids) with documented antioxidant, anti-inflammatory (NF-κB↓), and context-dependent anticancer effects in cellular and preclinical models. Mechanistic themes include activation of the Nrf2/ARE antioxidant response, suppression of pro-inflammatory and survival pathways (such as NF-κB and PI3K/AKT), modulation of MAPK signaling, and downstream effects on cell-cycle, apoptosis, invasion, and angiogenesis. Oral exposure is influenced by rapid metabolism (phase II conjugates) and food matrix effects, which affects systemic bioavailability and translational relevance. Biological effects vary by specific hydroxycinnamic derivative and its conjugated/esterified form. (Caffeic acid ≠ ferulic acid ≠ sinapic acid)

-Ferulic acid and p‐coumaric acid are naturally occurring hydroxycinnamic acids found in many plant-based foods (such as whole grains, fruits, and vegetables)

CA showed pro-oxidant potential due to its ability to interact with metals like copper, inducing lipid peroxidation and causing DNA damage within tumor cells through either oxidation or covalent adduct formation.

Summary:
-HCAs are classically antioxidant
-Such as caffeic acid, ferulic acid, and sinapic acid (SA)
-May increase sensitivity to chemotherapy
-Bioavailability is problem. Formulation strategies (e.g., liposomal or encapsulated forms) are investigated to improve systemic exposure.
-Propolis has caffeic acid (Caffeic acid (0.639–4.172 mg/g propolis)
-SA at higher concentrations may acts as a potent pro-oxidant agent
-SA may act in collaboration with other chemotherapeutic agents to improve treatment sensitivity. -Co-administration of caffeic acid or CAPE with other anti-tumor compounds (e.g., gallic acid) has shown additive or synergistic effects in selected models
-Combination of caffeic acid and endogenous copper ions can result in oxidative damage
-Ferulic Acid (abundant in whole grains,popcorn): upregulate apoptotic protein and downregulate anti-apoptotic protein.upregulating (BAX), (p53), (CYCS) and downregulating (Bcl-2),

Major Hydroxycinnamic Acids and Their Main Mechanisms

Hydroxycinnamic Acid Abbreviation Major Sources Main Mechanisms of Action Cancer-Relevant Emphasis Notes
Caffeic acid CA Coffee, fruits, vegetables, herbs; also released from chlorogenic acids ROS modulation; NF-κB suppression; apoptosis induction; mitochondrial dysfunction in cancer cells; inhibition of migration and invasion; antioxidant activity in normal tissue ROS ↑ or ↓ (context-dependent); BAX ↑; BCL-2 ↓; caspases ↑; NF-κB ↓; MMPs ↓ One of the better-studied HCAs. Can act as an antioxidant at physiological exposure but become pro-oxidant under selected high-concentration or metal-dependent conditions.
Ferulic acid FA Whole grains, bran, rice, wheat, oats, fruits, vegetables Cell-cycle arrest; mitochondrial apoptosis; PI3K/AKT/mTOR suppression; NF-κB inhibition; NRF2 activation in normal tissue; inhibition of EMT, migration and invasion p53 ↑; p21 ↑; cyclins/CDKs ↓; BAX ↑; BCL-2 ↓; PI3K/AKT/mTOR ↓; MMP-2/9 ↓ Probably the most broadly characterized HCA for anticancer signaling. Many direct cytotoxic effects occur at concentrations much higher than typical dietary plasma exposure.
p-Coumaric acid p-CA Cereals, tomatoes, peanuts, fruits, vegetables, wine Antioxidant and redox modulation; apoptosis; cell-cycle suppression; inflammatory signaling inhibition; glycolytic suppression in selected models ROS modulation; apoptosis ↑; NF-κB ↓; PKM2 ↓ and glycolysis ↓ in selected models Frequently studied in combination with ferulic acid. Metabolic effects such as PKM2 suppression should not be assumed to be universal.
Sinapic acid SA Brassica vegetables, mustard, rapeseed, cereals Antioxidant activity; ROS-mediated apoptosis at higher concentrations; inflammatory pathway suppression; mitochondrial apoptosis; modulation of MAPK signaling ROS ↑ (high concentration) or ↓; mitochondrial apoptosis ↑; NF-κB ↓; MAPK modulation Less extensively characterized than caffeic or ferulic acid. Strong antioxidant effects predominate in many non-cancer models.
Chlorogenic acid CGA Coffee, apples, pears, berries, potatoes Antioxidant and NRF2-associated cytoprotection; inhibition of inflammatory signaling; modulation of AMPK, PI3K/AKT and apoptosis pathways; glucose-metabolism regulation NF-κB ↓; PI3K/AKT ↓ (model-dependent); apoptosis ↑; ROS modulation; AMPK ↑ An ester of caffeic acid and quinic acid rather than a simple free HCA. Often treated separately because its absorption and metabolism differ substantially from caffeic acid.
Caffeic acid phenethyl ester CAPE Propolis Potent NF-κB inhibition; ROS-mediated cancer-cell killing; mitochondrial apoptosis; suppression of proliferation, angiogenesis and invasion NF-κB ↓; ROS ↑; BAX ↑; BCL-2 ↓; VEGF ↓; MMPs ↓ A caffeic-acid derivative rather than a simple dietary HCA. Its pharmacology is sufficiently distinct that it is usually best treated as a separate compound.
Rosmarinic acid RA Rosemary, basil, lemon balm, sage and other Lamiaceae herbs Antioxidant and NRF2 activation; NF-κB inhibition; apoptosis; suppression of PI3K/AKT and EMT; anti-inflammatory signaling ROS ↓ or ↑ (context-dependent); NRF2 ↑; NF-κB ↓; PI3K/AKT ↓; EMT ↓; apoptosis ↑ An ester containing caffeic-acid-related structures. Often considered a hydroxycinnamic-acid derivative rather than a simple HCA.
Isoferulic acid IFA Cimicifuga species and selected medicinal plants Antioxidant activity; inflammatory signaling suppression; glucose-metabolism modulation; apoptosis and growth inhibition in limited cancer models NF-κB ↓; ROS ↓; apoptosis ↑ (model-dependent) Structural isomer of ferulic acid with substantially less cancer-specific evidence.
o-Coumaric acid o-CA Plants, cereals and some fruits Antioxidant and antimicrobial effects; limited evidence for apoptosis and proliferation suppression ROS modulation; proliferation ↓ (limited evidence) Much less studied for cancer than p-coumaric acid.
m-Coumaric acid m-CA Minor constituent of various plants and foods Antioxidant and redox modulation; limited anti-inflammatory and antiproliferative activity ROS modulation; inflammatory signaling ↓ (limited evidence) Cancer evidence is sparse compared with the para isomer.

Practical grouping: For a class-level Hydroxycinnamic Acid entry, the four core free HCAs are caffeic acid, ferulic acid, p-coumaric acid, and sinapic acid. Chlorogenic acid, rosmarinic acid, and CAPE are chemically related HCA derivatives but have sufficiently distinct pharmacokinetics and biological activity that they are often better maintained as separate database products.

Hydroxycinnamic acids — HCAs are a family of plant-derived phenolic acids characterized by a C6-C3 cinnamic-acid backbone bearing one or more hydroxyl/methoxy substituents. Major dietary HCAs include caffeic acid, ferulic acid, p-coumaric acid, and sinapic acid; chlorogenic acids and related esters are important dietary conjugates. HCAs are classified as non-flavonoid polyphenolic phenolic acids and occur widely in coffee, cereals, fruits, vegetables, herbs, and plant-derived foods. They are not a single pharmacologically uniform agent: caffeic acid, ferulic acid, p-coumaric acid, and sinapic acid can differ substantially in potency, redox behavior, metabolism, and molecular targets. Anticancer activity remains predominantly preclinical and should generally be attributed to the specific HCA rather than generalized to the entire class.

Primary mechanisms (ranked):

  1. Redox modulation: antioxidant activity predominates physiologically, whereas selected HCAs can become pro-oxidant in tumor models, particularly at high concentrations or in the presence of transition metals such as Cu²⁺, producing ROS and oxidative DNA damage.
  2. Apoptosis and mitochondrial death signaling: selected HCAs increase BAX/BCL-2 ratio, cytochrome-c release, caspase activation, and PARP cleavage in cancer models.
  3. Cell-cycle and proliferative signaling suppression: modulation of p53/p21 and suppression of cyclins/CDKs can produce G0/G1, S, or G2/M arrest depending on compound and tumor model.
  4. NF-κB and inflammatory signaling suppression: HCAs frequently suppress NF-κB-associated inflammatory and prosurvival signaling, including COX-2 and inflammatory cytokine pathways.
  5. PI3K/AKT/mTOR and MAPK modulation: selected HCAs inhibit prosurvival PI3K/AKT/mTOR signaling and alter ERK/JNK/p38 signaling in a strongly model-dependent manner.
  6. Migration, EMT and extracellular-matrix remodeling: reduced MMP-2/MMP-9, EMT signaling, migration and invasion are reported for several HCAs.
  7. Metabolic suppression: ferulic acid plus p-coumaric acid has been reported to suppress PKM2-associated aerobic glycolysis; this is mechanistically interesting but should not yet be generalized to all HCAs.
  8. NRF2/ARE antioxidant response (secondary): activation of NRF2, HO-1 and endogenous antioxidant systems is prominent in normal/stressed tissues and contributes to cytoprotection; in established cancer, NRF2 activation could theoretically be tumor-protective in some contexts.
  9. Chemo- and radiosensitization (context-dependent): selected HCAs enhance chemotherapy- or radiation-induced tumor-cell killing experimentally, but evidence is compound- and model-specific rather than a demonstrated class-wide clinical effect.

Bioavailability / PK relevance: HCAs are absorbed from the gastrointestinal tract, but the parent aglycones undergo substantial intestinal, hepatic and microbiome metabolism, particularly glucuronidation, sulfation, methylation and hydrogenation. Circulating exposure therefore consists substantially of conjugated and microbial metabolites rather than unchanged parent compound. Food matrix, esterification and site of intestinal release materially alter exposure. Pharmacokinetic reviews indicate that systemic parent-HCA concentrations after dietary intake are generally in the submicromolar-to-low-micromolar range, with one recent systematic assessment reporting maximal blood concentrations around 0.4 µM for cinnamic-acid derivatives such as caffeic/ferulic acid in the datasets examined. Formulation approaches including nanoparticles and encapsulation are being investigated to increase exposure.

In-vitro vs systemic exposure relevance: Many reported direct anticancer effects use tens to hundreds of micromolar HCA concentrations. For example, ferulic acid produced IC50 values of approximately 300 µM in PC-3 and 500 µM in LNCaP prostate cancer cells. These concentrations greatly exceed typical circulating concentrations attainable from ordinary dietary exposure. Consequently, direct tumor-cell cytotoxicity demonstrated at high in-vitro concentrations should not be interpreted as evidence that dietary HCAs achieve equivalent systemic anticancer exposure. Metabolites, local gastrointestinal exposure, chronic signaling effects and specialized formulations may have different pharmacological relevance.

Clinical evidence status: Preclinical for cancer treatment. There is substantial cell-culture evidence and some animal-tumor evidence for individual HCAs, especially ferulic and caffeic acids, but no established HCA-class anticancer therapy and no convincing randomized human evidence demonstrating treatment of established cancer with isolated HCAs. Human studies more commonly concern dietary exposure, cardiovascular/metabolic effects, pharmacokinetics, skin photoprotection or complex HCA-containing foods/extracts. HCAs should therefore be classified as experimental/preclinical anticancer agents rather than clinical adjuncts.

Hydroxycinnamic Acid Cancer Mechanisms

Rank Pathway / Axis Cancer Cells Normal Cells TSF Primary Effect Notes / Interpretation
1 Redox balance and ROS ROS ↑ or ↓ (dose-dependent) (context-dependent) ROS ↓; oxidative injury ↓ P, R Redox stress modulation HCAs are generally antioxidants at physiological exposure but caffeic, sinapic and related HCAs can become pro-oxidant under selected conditions. Cu²⁺-dependent oxidative DNA damage is a documented mechanism and should not be generalized to normal dietary exposure.
2 Mitochondrial apoptosis BAX ↑; BCL-2 ↓; cytochrome-c ↑; caspases ↑; apoptosis ↑ ↔ (model-dependent) R, G Intrinsic and extrinsic apoptosis Strongly represented in ferulic, caffeic and sinapic acid tumor-cell studies, typically at pharmacological in-vitro concentrations.
3 Cell-cycle checkpoints p53 ↑; p21 ↑; cyclins ↓; CDK2/4/6 ↓; cell-cycle arrest ↑ ↔ G Cytostasis Ferulic acid has experimentally increased TP53, CDKN1A and CDKN1B while suppressing several cyclins and CDKs; exact arrest phase varies with cell type.
4 NF-κB inflammatory and survival signaling NF-κB ↓; COX-2 ↓; inflammatory signaling ↓ NF-κB ↓ (stress-dependent); inflammation ↓ R, G Anti-inflammatory and prosurvival suppression One of the more reproducible HCA-family signaling themes, although strength varies among individual derivatives.
5 PI3K AKT mTOR survival axis PI3K ↓; AKT ↓; mTOR ↓ (model-dependent) ↔ or mTOR ↓ (context-dependent) R, G Growth and survival suppression Reported particularly for ferulic and other individual HCAs; not sufficiently uniform to assign identical modulation to every member of the class.
6 Migration EMT and matrix remodeling MMP-2 ↓; MMP-9 ↓; EMT ↓; migration ↓; invasion ↓ ↔ G Anti-invasive phenotype Observed in breast, prostate, thyroid, pancreatic and other experimental cancer systems with selected HCAs.
7 MAPK signaling ERK JNK p38 ↔ (context-dependent) ERK JNK p38 ↔ (context-dependent) P, R, G Stress and proliferation signaling Direction is highly dependent on derivative, concentration, duration and cell type; a fixed class-wide arrow is inappropriate.
8 PKM2 and aerobic glycolysis PKM2 ↓; glycolysis ↓ ↔ R, G Metabolic growth restriction Demonstrated particularly for combined ferulic acid plus p-coumaric acid through an lncRNA/PKM2-associated mechanism. This is not established as a universal HCA effect.
9 Angiogenesis signaling VEGF ↓; angiogenesis ↓ (model-dependent) ↔ G Anti-angiogenic activity Preclinical evidence exists for selected HCAs and derivatives but is less central than apoptosis, redox and proliferation mechanisms.
10 NRF2 ARE antioxidant response NRF2 ↑ or ↔ (context-dependent) NRF2 ↑; HO-1 ↑; GSH systems ↑ R, G Secondary antioxidant adaptation Generally cytoprotective in normal tissues. NRF2 activation is not necessarily desirable in established tumors because persistent NRF2 signaling can support tumor stress resistance.
11 Chemosensitization Drug sensitivity ↑ (model-dependent) Normal-tissue toxicity ↓ in some models G Combination-treatment modulation Reported with selected HCAs and specific anticancer agents. Evidence remains preclinical and cannot be generalized to chemotherapy as a whole.
12 Radiosensitization Radiation sensitivity ↑ (model-dependent) Radioprotection reported in other contexts P, R, G Radiation-response modulation Ferulic acid has sensitized cervical cancer cells experimentally through enhanced oxidative damage, while antioxidant properties can be radioprotective in normal tissues.
13 Clinical Translation Constraint Parent-compound exposure ↓; extensive conjugation ↑ Dietary exposure generally well tolerated R, G Bioavailability and dose limitation Many anticancer experiments use approximately 10–500 µM concentrations whereas typical circulating dietary exposure is far lower and substantially metabolized. Human cancer efficacy has not been established.

TSF: P: 0–30 min     R: 30 min–3 hr     G: >3 hr



Alzheimer’s disease: Hydroxycinnamic acids have preclinical neuroprotective relevance, particularly caffeic and ferulic acids. Reported mechanisms include suppression of Aβ-associated oxidative stress and neuroinflammation, enhancement of endogenous antioxidant defenses, modulation of CREB/neurotrophic signaling, and possible effects on amyloid- and tau-associated pathology. Evidence is primarily cellular and animal-based; convincing clinical evidence that isolated HCAs prevent or treat Alzheimer’s disease is lacking. Rapid metabolism, low parent-compound systemic exposure and uncertain brain exposure remain important translational constraints.

Hydroxycinnamic Acids in Alzheimer’s Disease

Rank Pathway / Axis Modulation Primary Effect Notes / Interpretation
1 Oxidative stress and NRF2 ROS ↓; NRF2 ↑; antioxidant defenses ↑ Neuroprotection Consistent with caffeic- and ferulic-acid preclinical models; principally antioxidant/cytoprotective rather than direct disease modification established in humans.
2 Amyloid beta toxicity Aβ toxicity ↓; associated neuronal injury ↓ Reduced amyloid-associated neurotoxicity Caffeic acid has demonstrated protection in Aβ-induced mouse models.
3 Neuroinflammation NF-κB-associated inflammation ↓; inflammatory mediators ↓ Reduced inflammatory neuronal injury Supported mainly by cellular and animal studies.
4 CREB and neurotrophic signaling CREB ↑; neuronal survival signaling ↑ Synaptic and neuronal support Ferulic acid has been associated with CREB phosphorylation and broader neurotrophic signaling.
5 Tau pathology Tau-associated pathology ↓ (model-dependent) Potential cytoskeletal protection Evidence is substantially weaker than for oxidative stress and Aβ-related mechanisms.
6 Clinical Translation Constraint Brain exposure ↓; metabolism ↑ Limits therapeutic translation No established HCA treatment for AD; oral bioavailability, extensive conjugation and BBB exposure remain unresolved for pharmacological use.


HO-1, HMOX1: Click to Expand ⟱
Source:
Type:
(Also known as Hsp32 and HMOX1)
HO-1 is the common abbreviation for the protein (heme oxygenase‑1) produced by the HMOX1 gene.
HO-1 is an enzyme that plays a crucial role in various cellular processes, including the breakdown of heme, a toxic molecule. Research has shown that HO-1 is involved in the development and progression of cancer.
-widely regarded as having antioxidant and cytoprotective effects
-The overall activity of HO‑1 helps to reduce the pro‐oxidant load (by degrading free heme, a pro‑oxidant) and to generate molecules (like bilirubin) that can protect cells from oxidative damage

Studies have found that HO-1 is overexpressed in various types of cancer, including lung, breast, colon, and prostate cancer. The overexpression of HO-1 in cancer cells can contribute to their survival and proliferation by:
  Reducing oxidative stress and inflammation
  Promoting angiogenesis (the formation of new blood vessels)
  Inhibiting apoptosis (programmed cell death)
  Enhancing cell migration and invasion
When HO-1 is at a normal level, it mainly exerts an antioxidant effect, and when it is excessively elevated, it causes an accumulation of iron ions.

A proper cellular level of HMOX1 plays an antioxidative function to protect cells from ROS toxicity. However, its overexpression has pro-oxidant effects to induce ferroptosis of cells, which is dependent on intracellular iron accumulation and increased ROS content upon excessive activation of HMOX1.

-Curcumin   Activates the Nrf2 pathway leading to HO‑1 induction; known for its anti‑inflammatory and antioxidant effects.
-Resveratrol  Induces HO‑1 via activation of SIRT1/Nrf2 signaling; exhibits antioxidant and cardioprotective properties.
-Quercetin   Activates Nrf2 and related antioxidant pathways; contributes to anti‑oxidative and anti‑inflammatory responses.
-EGCG     Promotes HO‑1 expression through activation of the Nrf2/ARE pathway; also exhibits anti‑inflammatory and anticancer properties.
-Sulforaphane One of the most potent natural HO‑1 inducers; triggers Nrf2 nuclear translocation and upregulates a battery of phase II detoxifying enzymes.
-Luteolin    Induces HO‑1 via Nrf2 activation; may also exert anti‑inflammatory and neuroprotective effects in various cell models.
-Apigenin   Has been reported to induce HO‑1 expression partly via the MAPK and Nrf2 pathways; also known for anti‑inflammatory and anticancer activities.
Scientific Papers found: Click to Expand⟱
7519- Phen,  HCAs,    Neuroprotective role of phenolic acids: mechanistic insights into cognitive decline and neurodegenerative disorder
- Review, AD, NA
*antiOx↑, *Inflam↓, *Apoptosis↓, *AntiAg↑, *NRF2↑, *HO-1↑, *NF-kB↓, *PI3K↑, *Akt↑, *cognitive↑, *neuroP↑,

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:


Redox & Oxidative Stress(tgid=1) ⓘ

antiOx↑, 1,   HO-1↑, 1,   NRF2↑, 1,  

Cell Death(tgid=5) ⓘ

Akt↑, 1,   Apoptosis↓, 1,  

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

PI3K↑, 1,  

Migration(tgid=13) ⓘ

AntiAg↑, 1,  

Immune & Inflammatory Signaling(tgid=16) ⓘ

Inflam↓, 1,   NF-kB↓, 1,  

Functional Outcomes(tgid=23) ⓘ

cognitive↑, 1,   neuroP↑, 1,  
Total Targets: 11

Scientific Paper Hit Count for: HO-1, HMOX1
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#:95  Target#:597  State#:%  Dir#:2
  wNotes=0  sortOrder:rid,rpid

 

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