Capsaicin / Ca+2 Cancer Research Results

CAP, Capsaicin: Click to Expand ⟱
Features:
Capsaicin is a chemical compound that gives chili peppers their spicy flavor and heat.

Biological activity, capsaicin has been reported to exhibit a range of effects, including:
Pain relief: 10-50 μM
Anti-inflammatory activity: 20-50 μM
Antioxidant activity: 10-100 μM
Anti-cancer activity: 50-100 μM
Cardiovascular health: 20-50 μM

Approximate μM concentrations of capsaicin, the active compound in chili peppers, that can be achieved with different amounts of chili peppers:
1 teaspoon of dried chili pepper flakes (5g):~10-50 μM of capsaicin
1 tablespoon of dried chili pepper flakes (15g): ~30-150 μM of capsaicin
1 cup of fresh chili peppers (100g): ~100-500 μM of capsaicin
1 teaspoon of chili pepper extract (5g): ~100-500 μM of capsaicin
1 tablespoon of chili pepper extract (15g): ~300-1500 μM of capsaicin

Approximate μM concentrations of capsaicin in various foods that contain capsaicin:
Jalapeño peppers: 1 pepper (20g): ~20-100 μM of capsaicin 2–8 mg/100g of fresh Jalapeño
Serrano peppers: 1 pepper (10g): ~10-50 μM of capsaicin 5–15 mg/100g
Cayenne peppers: 1 pepper (10g): ~50-200 μM of capsaicin
Habanero peppers: 1 pepper (20g): ~100-500 μM of capsaicin 15–30 mg/100g
Ghost peppers: 1 pepper (20g): ~200-1000 μM of capsaicin
Hot sauce: 1 teaspoon (5g): ~10-50 μM of capsaicin
Chili flakes: 1 teaspoon (5g): ~10-50 μM of capsaicin
Spicy sauces and marinades: 1 tablespoon (15g): ~10-50 μM of capsaicin

Cayenne Pepper Powder – Approximate capsaicin content: roughly 5–20 mg/g (15-30g human for 100uM?)

-IC50 in Cancer Cell Lines: Approximately 50–300 µM (consume 150mg of capsaican not possible?)
-IC50 in Normal Cell Lines: Generally higher—often 2–3 times greater

Pathways:
-disrupting mitochondrial membrane potential, leading to cytochrome c release and subsequent activation of caspases
-Activation of TRPV1: resulting in increased intracellular calcium levels
-capsaicin can lead to increased production of ROS within cancer cells
-Inhibition of NF-κB
-Inhibit PI3K/AKT/mTOR signaling
-STAT3 Inhibition
-Cell Cycle Arrest
-reduce the expression of vascular endothelial growth factor (VEGF)
-COX-2
-capsaicin is a natural ADAM10 activator and shows potential to attenuate amyloid pathology and protect against AD

Capsaicin — capsaicin is a pungent vanilloid alkaloid phytochemical from Capsicum peppers and the principal TRPV1 agonist responsible for chili heat. It is best classified as a natural product / small-molecule vanilloid with approved topical analgesic use but no established anticancer indication. Standard abbreviations include CAP and CAPS. In cancer literature it is a pleiotropic stressor whose dominant preclinical effects usually converge on Ca2+ influx, mitochondrial dysfunction, ROS generation, suppression of pro-survival signaling, and apoptosis, but its biology is context- and concentration-dependent, with occasional low-dose pro-migratory / pro-metastatic signaling reported.

Primary mechanisms (ranked):

  1. TRPV-linked cation influx with intracellular Ca2+ dysregulation, variably via TRPV1 or other TRPV-family context such as TRPV6
  2. Mitochondrial injury with loss of membrane potential, cytochrome c release, and intrinsic apoptotic execution
  3. Mitochondrial and cellular ROS increase with redox stress exceeding tumor buffering capacity
  4. Suppression of STAT3 and related survival transcription programs in multiple models
  5. Suppression of NF-κB-centered inflammatory / survival signaling, with downstream anti-migratory and radiosensitizing implications in some settings
  6. PI3K/Akt/mTOR attenuation and cell-cycle restraint in responsive models
  7. Contextual induction of autophagy as a stress-adaptation program that may either accompany death or partially buffer it
  8. Anti-migratory / anti-invasive effects in many models, but with an important low-concentration exception in some colorectal systems

Bioavailability / PK relevance: Capsaicin is lipophilic, rapidly absorbed, and rapidly metabolized, with substantial first-pass limitation after oral exposure. Human oral PK from a capsicum preparation containing 26.6 mg capsaicin produced a Cmax of about 2.47 ng/mL at ~47 minutes, while the FDA-approved 8% topical system produced transient systemic exposure usually below 5 ng/mL, with a highest detected plasma level of 4.6 ng/mL. Delivery is therefore a major translation constraint for anticancer use, and formulation-based approaches are often invoked to overcome short half-life, irritancy, and exposure limits.

In-vitro vs systemic exposure relevance: This is a major limitation. Many anticancer cell studies use roughly 10–300 µM, whereas reported human plasma exposures from oral or approved topical use are in the low ng/mL range, approximately ~0.008–0.015 µM, i.e., orders of magnitude lower than many cytotoxic in-vitro concentrations. Accordingly, direct systemic tumoricidal translation from standard dietary or approved topical exposure is weak unless local delivery, sustained-release systems, or substantially altered formulations are used.

Clinical evidence status: Anticancer evidence is predominantly preclinical, with in-vitro and some in-vivo support across several tumor types. There is no regulatory approval for cancer treatment. Human oncology use is currently much more credible as supportive care for neuropathic pain, especially chemotherapy-induced peripheral neuropathy, where topical high-concentration capsaicin patches are being studied and used off-label / investigationally, rather than as a direct antitumor therapy.

Mechanistic Table

Rank Pathway / Axis Cancer Cells Normal Cells TSF Primary Effect Notes / Interpretation
1 TRPV-linked Ca2+ influx Ca2+ ↑; death signaling ↑ Sensory excitation ↑; irritancy ↑ P/R Upstream trigger Usually framed through TRPV1, but some tumor models show dependence on other TRPV-family context such as TRPV6; this is mechanistically central but not uniform across cancers.
2 Mitochondrial membrane potential MMP ↓; cytochrome c release ↑ ↔ / stress if exposed R Intrinsic apoptosis initiation Mitochondrial dysfunction is one of the most reproducible downstream events and often links Ca2+ overload with apoptosis.
3 Mitochondrial ROS increase ROS ↑; redox buffering overwhelmed ↔ / antioxidant response may compensate P/R Stress amplification Frequently sits upstream of mitochondrial collapse, DNA damage signaling, and apoptosis; cancer selectivity is often attributed to weaker redox reserve.
4 Intrinsic apoptosis machinery BAX/Bak ↑; Bcl-2/Bcl-xL ↓; caspase-3/9 ↑ ↔ / lower sensitivity in some comparisons R/G Execution-phase cell death Common endpoint across responsive models; often follows ROS and mitochondrial injury rather than acting as the primary initiating lesion.
5 STAT3 survival signaling STAT3 ↓ ↔ R/G Reduced survival and proliferation Well supported in multiple myeloma and other models, but not universal; note that a HepG2 context reported ROS-associated STAT3 activation coupled to autophagy.
6 NF-κB inflammatory survival axis NF-κB ↓ Inflammatory tone ↓ R/G Anti-survival; anti-migratory Important for invasion restraint and likely part of observed radiosensitization in some models.
7 PI3K Akt mTOR axis PI3K/Akt/mTOR ↓ ↔ R/G Growth suppression Seen in several responsive systems, but this axis is also part of the cautionary low-dose pro-metastatic literature in colorectal cancer.
8 Cell-cycle control G0/G1 or G1/S arrest ↑ ↔ G Proliferation blockade Usually secondary to upstream stress and survival-pathway suppression rather than the earliest event.
9 Autophagy stress program Autophagy ↑ (context-dependent) ↔ G Adaptive buffering or co-lethal stress In HepG2, autophagy appeared partially protective because inhibiting it enhanced capsaicin-induced apoptosis.
10 Migration invasion EMT phenotype Migration ↓; invasion ↓; EMT ↓ (context-dependent) ↔ G Anti-metastatic phenotype Frequently reported at active doses, often linked to AMPK activation and NF-κB suppression.
11 Low-dose paradox flag ROS ↑ with Akt/mTOR ↑ and STAT3 ↑ (model-dependent) ↔ G Potential pro-metastatic signaling Important caution: low-concentration capsaicin has been reported to enhance metastatic behavior in colorectal cancer models.
12 Radiosensitization or Chemosensitization Sensitivity ↑ (context-dependent) Unknown G Adjunct potential Preclinical support exists, especially via NF-κB and stress-pathway modulation, but this remains non-clinically established for direct cancer treatment.
13 Clinical Translation Constraint Required tumoricidal exposure often not reached systemically Irritation and tolerability limit escalation G Translation bottleneck Typical antitumor in-vitro concentrations greatly exceed known plasma exposure from standard oral intake or approved topical use; formulation, local delivery, and tumor heterogeneity are major constraints.

P: 0–30 min

R: 30 min–3 hr

G: >3 hr
Ca+2, Calcium Ion Ca+2: Click to Expand ⟱
Source:
Type:
In all eukaryotic cells, intracellular Ca2+ levels are maintained at low resting concentrations (approximately 100 nM) by the activity of the major Ca2+ extrusion system, the plasma membrane Ca2+-ATPase (PMCA), which exchanges extracellular protons (H+) for cytosolic Ca2+.
Indeed, sustained elevation of [Ca2+]C in the form of overload, saturating all Ca2+-dependent effectors, prolonged decrease in [Ca2+]ER, causing ER stress response, and high [Ca2+]M, inducing mitochondrial permeability transition (MPT), are considered to be pro-death factors.
In cancer the Ca2+-handling toolkit undergoes profound remodelling (figure 1) to favour activation of Ca2+-dependent transcription factors, such as the nuclear factor of activated T cells (NFAT), c-Myc, c-Jun, c-Fos that promote hypertrophic growth via induction of the expression of the G1 and G1/S phase transition cyclins (D and E) and associated cyclin-dependent kinases (CDK4 and CDK2).
Thus, cancer cells may evade apoptosis through decreasing calcium influx into the cytoplasm. This can be achieved by either downregulation of the expression of plasma membrane Ca2+-permeable ion channels or by reducing the effectiveness of the signalling pathways that activate these channels. Such protective measures would largely diminish the possibility of Ca2+ overload in response to pro-apoptotic stimuli, thereby impairing the effectiveness of mitochondrial and cytoplasmic apoptotic pathways.
Voltage-Gated Calcium Channels (VGCCs): Overexpression of VGCCs has been associated with increased tumor growth and metastasis in various cancers, including breast and prostate cancer.
Store-Operated Calcium Entry (SOCE): SOCE mechanisms, such as STIM1 and ORAI1, are often upregulated in cancer cells, contributing to enhanced cell survival and proliferation.
High intracellular calcium levels are associated with increased cell proliferation and migration, leading to a poorer prognosis. Calcium signaling can also influence hormone receptor status, affecting treatment responses.
Increased Ca²⁺ signaling is associated with advanced disease and metastasis. Patients with higher CaSR expression may have a worse prognosis due to enhanced tumor growth and resistance to apoptosis. -Ca2+ is an important regulator of the electric charge distribution of bio-membranes.
Scientific Papers found: Click to Expand⟱
5838- CAP,    Capsaicin Induces Autophagy and Apoptosis in Human Nasopharyngeal Carcinoma Cells by Downregulating the PI3K/AKT/mTOR Pathway
- in-vitro, NPC, NA
TumCG↓, TumCCA↑, TumAuto↑, Casp3↑, Ca+2↑, ROS↑, MMP↓, LC3‑Ⅱ/LC3‑Ⅰ↑, ATG5↑, p62↓, Fap1↓, PI3K↓, DNAdam↑,
5835- CAP,    Capsaicin and dihydrocapsaicin induce apoptosis in human glioma cells via ROS and Ca2+-mediated mitochondrial pathway
- in-vitro, GBM, U251
tumCV↓, Apoptosis↑, selectivity↑, ROS↑, Ca+2↑, MMP↓, Cyt‑c↑, Casp↑, eff↑, MPT↑, ETC↓, Casp3↑, Casp9↑,
5833- CAP,    Capsaicin: From Plants to a Cancer-Suppressing Agent
- Review, Var, NA
chemoPv↑, TumCCA↑, Apoptosis↑, ROS↑, MMP↓, Ca+2↑, JNK↑, Casp3↑, NADH↓, CDK2↓, CDK4↓, CDK6↓, P53↑,
5831- CAP,    Unraveling TRPV1’s Role in Cancer: Expression, Modulation, and Therapeutic Opportunities with Capsaicin
TRPV1↑, Ca+2↑, AntiCan↑, TumCP↓, Pain↓, TumCG↓, ChemoSen↑, Apoptosis↑, ROS↑, MMP↓, Cyt‑c↑, Casp↑,
5827- CAP,    The Effect of Topical Capsaicin 8% on Pain in Chemotherapy-induced Peripheral Neuropathy
- Trial, Var, NA
Pain↓, NP/CIPN↓, Dose↝, TRPV1↑, Ca+2↑,
5826- CAP,    Capsaicin induces mitochondrial dysfunction and apoptosis in anaplastic thyroid carcinoma cells via TRPV1-mediated mitochondrial calcium overload
- in-vitro, Thyroid, NA
TRPV1↑, tumCV↓, Ca+2↑, mtDam↑, ROS↑, MMP↓, MPT↑, Cyt‑c↑, Casp↑, Apoptosis↑,
5861- CAP,    Anticancer Properties of Capsaicin Against Human Cancer
- Review, Var, NA
*antiOx↑, *Inflam↓, *Obesity↓, chemoPv↑, Apoptosis↑, selectivity↑, TRPV1↑, Ca+2↑, mtDam↑, Cyt‑c↑, P53↑, SIRT1↓, TumCCA↑, P21↑, CDK4↓, CDK6↓, cycE/CCNE↓, angioG↓, TumMeta↓,
5859- CAP,    Are We Ready to Recommend Capsaicin for Disorders Other Than Neuropathic Pain?
- Review, Var, NA
*TRPV1↑, *Ca+2↑, *Na+↑, *UCPs↑, *SIRT1↑, *PPARγ↑, *Inflam↓, *lipid-P↑, *IL6↓, *TNF-α↓, *NF-kB↓, *p‑Akt↑, *NRF2↑, *HO-1↑, *ROS↑, *GutMicro↑,
5858- CAP,    Capsaicin as a Microbiome Modulator: Metabolic Interactions and Implications for Host Health
- Review, Nor, NA - Review, AD, NA
*BBB↓, *GutMicro↑, Obesity↓, *Inflam↓, *AntiCan↑, *TRPV1↑, *Ca+2↑, *antiOx↑, *cardioP↑, *BioAv↓, *Half-Life↓, *BioAv↝, *BioAv↑, *neuroP↑, Apoptosis↑, p38↑, ROS↑, MMP↓, MPT↑, Cyt‑c↑, Casp↑, TRIB3↑, NADH↓, SIRT1↓, TumCG↓, TumCMig↓, TOP1↓, TOP2↓, β-catenin/ZEB1↓, *ROS↓, *Aβ↓,
5854- CAP,    Pharmacological activity of capsaicin: Mechanisms and controversies (Review)
- Review, Var, NA - Review, AD, NA
Obesity↓, Half-Life↓, antiOx↑, TRPV1↑, STAT3↓, Ca+2↑, ROS↑, MMP↓, *neuroP↑, *tau↓, *Inflam↓, *ROS?,
5852- CAP,    Capsaicin Synergizes with Camptothecin to Induce Increased Apoptosis in Human Small Cell Lung Cancers via the Calpain Pathway
- vitro+vivo, NSCLC, NA
ChemoSen↑, Ca+2↑, cal2↑,
5850- CAP,    Anticancer Activity of Natural and Synthetic Capsaicin Analogs
- Review, Var, NA
TRPV1↑, Ca+2↑, ROS↑, mitResp↓, ChemoSen↑, P-gp↓,
5849- CAP,    The Impact of TRPV1 on Cancer Pathogenesis and Therapy: A Systematic Review
- Review, Var, NA
TRPV1↑, Ca+2↑, TumCD↑, TumCCA↑, Apoptosis↑, P53↑, Fas↑, PI3K↑, AR↑, STAT3↓, ROS↑, MMP↓, ATP↓, CHOP↑, TumCMig↓, Twist↓, Snail↓, MMP2↓, MMP9↓, E-cadherin↑,
2019- CAP,    Capsaicin: A Two-Decade Systematic Review of Global Research Output and Recent Advances Against Human Cancer
- Review, Var, NA
chemoPv↑, Ca+2↑, antiOx↑, *ROS↓, *MMP∅, *Cyt‑c∅, *Casp3∅, *eff↑, *Inflam↓, *NF-kB↓, *COX2↓, iNOS↓, TRPV1↑, i-Ca+2?, MMP↓, Cyt‑c↑, Bax:Bcl2↑, P53↑, JNK↑, PI3K↓, Akt↓, mTOR↓, LC3II↑, ATG5↑, p62↑, Fap1↓, Casp3↑, Apoptosis↑, ROS↑, MMP9↓, eff↑, eff↓, eff↑, selectivity↑, eff↑, ChemoSen↑,
2018- CAP,  MF,    Capsaicin: Effects on the Pathogenesis of Hepatocellular Carcinoma
- Review, HCC, NA
TRPV1↑, eff↑, Akt↓, mTOR↓, p‑STAT3↑, MMP2↑, ER Stress↑, Ca+2↑, ROS↑, selectivity↑, MMP↓, eff↑,
2012- CAP,    Capsaicin induces cytotoxicity in human osteosarcoma MG63 cells through TRPV1-dependent and -independent pathways
- NA, OS, MG63
AntiTum↑, Apoptosis↑, TRPV1↑, ROS↑, SOD↓, AMPK↑, P53↑, JNK↑, Bcl-2↓, Cyt‑c↑, cl‑Casp3↑, cl‑PARP↑, Ca+2↑, MMP↓,
2020- CAP,    Capsaicinoids and Their Effects on Cancer: The “Double-Edged Sword” Postulate from the Molecular Scale
- Review, Var, NA
AntiTum↑, selectivity↑, TRPV1↑, MMP↓, Ca+2↑, ER Stress↑, angioG↓, Casp3?, cl‑PARP↑, selectivity↑, ROS↑, *ROS∅, selectivity↑,

Showing Research Papers: 1 to 17 of 17

* indicates research on normal cells as opposed to diseased cells
Total Research Paper Matches: 17

Pathway results for Effect on Cancer / Diseased Cells:


Redox & Oxidative Stress ⓘ

antiOx↑, 2,   NADH↓, 2,   ROS↑, 13,   SOD↓, 1,  

Mitochondria & Bioenergetics ⓘ

ATP↓, 1,   ETC↓, 1,   mitResp↓, 1,   MMP↓, 12,   MPT↑, 3,   mtDam↑, 2,  

Core Metabolism/Glycolysis ⓘ

AMPK↑, 1,   SIRT1↓, 2,  

Cell Death ⓘ

Akt↓, 2,   Apoptosis↑, 9,   Bax:Bcl2↑, 1,   Bcl-2↓, 1,   Casp↑, 4,   Casp3?, 1,   Casp3↑, 4,   cl‑Casp3↑, 1,   Casp9↑, 1,   Cyt‑c↑, 7,   Fap1↓, 2,   Fas↑, 1,   iNOS↓, 1,   JNK↑, 3,   p38↑, 1,   TRPV1↑, 11,   TumCD↑, 1,  

Transcription & Epigenetics ⓘ

tumCV↓, 2,  

Protein Folding & ER Stress ⓘ

CHOP↑, 1,   ER Stress↑, 2,  

Autophagy & Lysosomes ⓘ

ATG5↑, 2,   LC3‑Ⅱ/LC3‑Ⅰ↑, 1,   LC3II↑, 1,   p62↓, 1,   p62↑, 1,   TumAuto↑, 1,  

DNA Damage & Repair ⓘ

DNAdam↑, 1,   P53↑, 5,   cl‑PARP↑, 2,  

Cell Cycle & Senescence ⓘ

CDK2↓, 1,   CDK4↓, 2,   cycE/CCNE↓, 1,   P21↑, 1,   TumCCA↑, 4,  

Proliferation, Differentiation & Cell State ⓘ

mTOR↓, 2,   PI3K↓, 2,   PI3K↑, 1,   STAT3↓, 2,   p‑STAT3↑, 1,   TOP1↓, 1,   TOP2↓, 1,   TumCG↓, 3,  

Migration ⓘ

Ca+2↑, 15,   i-Ca+2?, 1,   cal2↑, 1,   E-cadherin↑, 1,   MMP2↓, 1,   MMP2↑, 1,   MMP9↓, 2,   Snail↓, 1,   TRIB3↑, 1,   TumCMig↓, 2,   TumCP↓, 1,   TumMeta↓, 1,   Twist↓, 1,   β-catenin/ZEB1↓, 1,  

Angiogenesis & Vasculature ⓘ

angioG↓, 2,  

Barriers & Transport ⓘ

P-gp↓, 1,  

Hormonal & Nuclear Receptors ⓘ

AR↑, 1,   CDK6↓, 2,  

Drug Metabolism & Resistance ⓘ

ChemoSen↑, 4,   Dose↝, 1,   eff↓, 1,   eff↑, 6,   Half-Life↓, 1,   selectivity↑, 7,  

Clinical Biomarkers ⓘ

AR↑, 1,   TRIB3↑, 1,  

Functional Outcomes ⓘ

AntiCan↑, 1,   AntiTum↑, 2,   chemoPv↑, 3,   NP/CIPN↓, 1,   Obesity↓, 2,   Pain↓, 2,  
Total Targets: 86

Pathway results for Effect on Normal Cells:


Redox & Oxidative Stress ⓘ

antiOx↑, 2,   HO-1↑, 1,   lipid-P↑, 1,   NRF2↑, 1,   ROS?, 1,   ROS↓, 2,   ROS↑, 1,   ROS∅, 1,   UCPs↑, 1,  

Mitochondria & Bioenergetics ⓘ

MMP∅, 1,  

Core Metabolism/Glycolysis ⓘ

PPARγ↑, 1,   SIRT1↑, 1,  

Cell Death ⓘ

p‑Akt↑, 1,   Casp3∅, 1,   Cyt‑c∅, 1,   TRPV1↑, 2,  

Migration ⓘ

Ca+2↑, 2,   Na+↑, 1,  

Barriers & Transport ⓘ

BBB↓, 1,   Na+↑, 1,  

Immune & Inflammatory Signaling ⓘ

COX2↓, 1,   IL6↓, 1,   Inflam↓, 5,   NF-kB↓, 2,   TNF-α↓, 1,  

Synaptic & Neurotransmission ⓘ

tau↓, 1,  

Protein Aggregation ⓘ

Aβ↓, 1,  

Drug Metabolism & Resistance ⓘ

BioAv↓, 1,   BioAv↑, 1,   BioAv↝, 1,   eff↑, 1,   Half-Life↓, 1,  

Clinical Biomarkers ⓘ

GutMicro↑, 2,   IL6↓, 1,  

Functional Outcomes ⓘ

AntiCan↑, 1,   cardioP↑, 1,   neuroP↑, 2,   Obesity↓, 1,  
Total Targets: 38

Scientific Paper Hit Count for: Ca+2, Calcium Ion Ca+2
17 Capsaicin
1 Magnetic Fields
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#:55  Target#:38  State#:%  Dir#:2
  wNotes=0  sortOrder:rid,rpid

 

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