Celecoxib / ROS Cancer Research Results

CEL, Celecoxib: Click to Expand ⟱
Features: NSAID
Celecoxib inhibits the formation of prostaglandins: used primarily to treat pain and other symptoms of osteoarthritis, rheumatoid arthritis, joint and musculoskeletal conditions.

Celecoxib is a diaryl-substituted selective cyclooxygenase-2 inhibitor that lowers prostaglandin synthesis and is used clinically as an oral nonsteroidal anti-inflammatory drug. It is formally classified as a small-molecule NSAID and COX-2–preferential inhibitor. Standard abbreviations include celecoxib and CEL. In oncology, its main rationale is suppression of the COX-2/PGE2 inflammatory-tumor axis, with additional COX-2-independent effects reported at higher experimental concentrations, including interference with PDK1/Akt signaling, ER calcium handling, and stress-linked apoptosis pathways. Nestronics lists it as an NSAID and currently indexes mainly EMT, HIF-1α/VEGF, COX-2, NF-κB, p65, and TGF-β/SMAD3-related findings.

Primary mechanisms (ranked):

  1. COX-2 inhibition with reduced PGE2 signaling and downstream inflammatory, proliferative, angiogenic, and immune-evasive tumor support
  2. Suppression of NF-κB-linked inflammatory survival programs
  3. Reduction of hypoxia/angiogenesis signaling including HIF-1α and VEGF in relevant models
  4. Partial inhibition of PDK1/Akt survival signaling in some tumor systems
  5. COX-2-independent ER stress and Ca²⁺ dysregulation via SERCA-related effects at supratherapeutic or high in-vitro concentrations
  6. Contextual chemosensitization, including effects on apoptosis threshold and in some reports drug-resistance programs such as P-gp
  7. Possible ancillary carbonic anhydrase inhibition is mechanistically interesting but not established as the dominant clinical anticancer mechanism

Bioavailability / PK relevance: Celecoxib is orally active. Peak plasma levels occur at about 3 hours, effective half-life is about 11 hours, steady state is reached by about day 5, and the drug is highly protein bound. Exposure is roughly dose-proportional up to 200 mg twice daily, with less-than-proportional increases above that range because of solubility limits. It is metabolized mainly by CYP2C9, so poor metabolizers and strong CYP2C9 interactions are clinically relevant.

In-vitro vs systemic exposure relevance: This is an important translation constraint. Many direct pro-apoptotic, SERCA/ER-stress, and stronger Akt-related anticancer effects are reported in vitro at concentrations commonly above those readily achievable with standard anti-inflammatory dosing. By contrast, COX-2/PGE2 suppression is clearly clinically reachable and is the most exposure-plausible core mechanism. Therefore, low- to mid-micromolar inflammatory and microenvironment effects are more translatable than high-concentration cytotoxic claims.

Clinical evidence status: Strong clinical deployment exists for pain/inflammatory indications, not for cancer treatment. In oncology, evidence is mixed: extensive preclinical support, some small human and adjunct studies, but major randomized adjuvant trials in unselected breast and stage III colon cancer were negative overall. A more recent biomarker-defined signal has emerged in PIK3CA-activated stage III colon cancer, where celecoxib appeared beneficial in subgroup analysis, so any cancer role currently looks biomarker- and context-dependent rather than broadly established.

Mechanistic table

Rank Pathway / Axis Cancer Cells Normal Cells TSF Primary Effect Notes / Interpretation
1 COX-2 / PGE2 inflammatory signaling COX-2 activity ↓; PGE2 tone ↓; proliferation, survival, invasion, immune evasion ↓ Inflammatory prostaglandin signaling ↓ R/G Core anti-inflammatory antitumor mechanism Best-supported and most clinically reachable mechanism; strongest translational anchor for oncology repurposing
2 NF-κB inflammatory survival axis NF-κB/p65 ↓; inflammatory survival transcription ↓ Inflammatory signaling ↓ R/G Reduced survival and inflammatory tone Consistent with Nestronics and broader literature; partly downstream of reduced PGE2 but may also reflect parallel signaling effects
3 HIF-1α / VEGF angiogenesis axis HIF-1α ↓; VEGF ↓; angiogenic support ↓ ↔ or angiogenic signaling ↓ in inflammatory settings G Antiangiogenic pressure Likely relevant in hypoxic and COX-2-high tumors; fits both Nestronics indexing and broader COX-2/PGE2 biology
4 TGF-β / SMAD3 / EMT TGF-β ↓; SMAD3 ↓; EMT ↓; migration/invasion ↓ ↔ G Anti-migratory and anti-invasive effect Nestronics support is specific here; likely more tumor-contextual than universally dominant
5 PDK1 / Akt survival signaling PDK1/Akt ↓ (context-dependent); apoptosis threshold ↓ ↔ R/G COX-independent survival suppression Mechanistically important in the celecoxib literature, but many strong effects are reported at higher in-vitro concentrations
6 Ca²⁺ homeostasis and ER stress ER Ca²⁺ reuptake ↓; cytosolic Ca²⁺ stress ↑; ER stress/apoptosis ↑ Potential stress if exposure is high enough P/R Stress-triggered apoptosis Usually linked to SERCA interference and considered mainly a high-concentration or COX-independent mechanism
7 Mitochondrial apoptosis program Caspase activation ↑; Bcl-2-family survival balance shifts toward apoptosis ↔ R/G Apoptotic execution Generally downstream of Akt inhibition, ER stress, or combined treatment sensitization rather than the first initiating event
8 Chemosensitization Drug sensitivity ↑; apoptosis with cytotoxics ↑ Potential inflammation/pain benefit in host context G Adjunctive therapy potential Observed preclinically and in some clinical adjunct settings, but not confirmed as a broad survival-improving strategy in unselected populations
9 P-gp and resistance signaling P-gp ↓ (model-dependent); intracellular drug retention ↑ ↔ G Possible reversal of drug resistance Interesting but not core; should be treated as secondary and context-specific
10 Carbonic anhydrase inhibition CA-related pH adaptation ↓ (context-dependent) Off-target CA interaction possible ↔ Ancillary microenvironment effect Celecoxib can inhibit carbonic anhydrases, but this is better viewed as a mechanistic side branch than the main oncology rationale for celecoxib itself
11 Clinical Translation Constraint Overall efficacy signal mixed; biomarker-defined benefit more plausible than broad use Cardiovascular, renal, GI, and drug-interaction liabilities constrain chronic escalation G Limits generalized oncology deployment Main constraint is that clinically achievable exposure strongly supports COX-2/PGE2 modulation, whereas many direct cytotoxic claims require higher concentrations; major adjuvant trials were negative overall, though PIK3CA-activated colon cancer is a notable exception signal

P: 0–30 min

R: 30 min–3 hr

G: >3 hr
ROS, Reactive Oxygen Species: Click to Expand ⟱
Source: HalifaxProj (inhibit)
Type:
Reactive oxygen species (ROS) are highly reactive molecules that contain oxygen and can lead to oxidative stress in cells. They play a dual role in cancer biology, acting as both promoters and suppressors of cancer.
ROS can cause oxidative damage to DNA, leading to mutations that may contribute to cancer initiation and progression. So normally you want to inhibit ROS to prevent cell mutations.
However excessive ROS can induce apoptosis (programmed cell death) in cancer cells, potentially limiting tumor growth. Chemotherapy typically raises ROS.
-mitochondria is the main source of reactive oxygen species (ROS) (and the ETC is heavily related)

"Reactive oxygen species (ROS) are two electron reduction products of oxygen, including superoxide anion, hydrogen peroxide, hydroxyl radical, lipid peroxides, protein peroxides and peroxides formed in nucleic acids 1. They are maintained in a dynamic balance by a series of reduction-oxidation (redox) reactions in biological systems and act as signaling molecules to drive cellular regulatory pathways."
"During different stages of cancer formation, abnormal ROS levels play paradoxical roles in cell growth and death 8. A physiological concentration of ROS that maintained in equilibrium is necessary for normal cell survival. Ectopic ROS accumulation promotes cell proliferation and consequently induces malignant transformation of normal cells by initiating pathological conversion of physiological signaling networks. Excessive ROS levels lead to cell death by damaging cellular components, including proteins, lipid bilayers, and chromosomes. Therefore, both scavenging abnormally elevated ROS to prevent early neoplasia and facilitating ROS production to specifically kill cancer cells are promising anticancer therapeutic strategies, in spite of their contradictoriness and complexity."
"ROS are the collection of derivatives of molecular oxygen that occur in biology, which can be categorized into two types, free radicals and non-radical species. The non-radical species are hydrogen peroxide (H 2O 2 ), organic hydroperoxides (ROOH), singlet molecular oxygen ( 1 O 2 ), electronically excited carbonyl, ozone (O3 ), hypochlorous acid (HOCl, and hypobromous acid HOBr). Free radical species are super-oxide anion radical (O 2•−), hydroxyl radical (•OH), peroxyl radical (ROO•) and alkoxyl radical (RO•) [130]. Any imbalance of ROS can lead to adverse effects. H2 O 2 and O 2 •− are the main redox signalling agents. The cellular concentration of H2 O 2 is about 10−8 M, which is almost a thousand times more than that of O2 •−".
"Radicals are molecules with an odd number of electrons in the outer shell [393,394]. A pair of radicals can be formed by breaking a chemical bond or electron transfer between two molecules."

Recent investigations have documented that polyphenols with good antioxidant activity may exhibit pro-oxidant activity in the presence of copper ions, which can induce apoptosis in various cancer cell lines but not in normal cells. "We have shown that such cell growth inhibition by polyphenols in cancer cells is reversed by copper-specific sequestering agent neocuproine to a significant extent whereas iron and zinc chelators are relatively ineffective, thus confirming the role of endogenous copper in the cytotoxic action of polyphenols against cancer cells. Therefore, this mechanism of mobilization of endogenous copper." > Ions could be one of the important mechanisms for the cytotoxic action of plant polyphenols against cancer cells and is possibly a common mechanism for all plant polyphenols. In fact, similar results obtained with four different polyphenolic compounds in this study, namely apigenin, luteolin, EGCG, and resveratrol, strengthen this idea.
Interestingly, the normal breast epithelial MCF10A cells have earlier been shown to possess no detectable copper as opposed to breast cancer cells [24], which may explain their resistance to polyphenols apigenin- and luteolin-induced growth inhibition as observed here (Fig. 1). We have earlier proposed [25] that this preferential cytotoxicity of plant polyphenols toward cancer cells is explained by the observation made several years earlier, which showed that copper levels in cancer cells are significantly elevated in various malignancies. Thus, because of higher intracellular copper levels in cancer cells, it may be predicted that the cytotoxic concentrations of polyphenols required would be lower in these cells as compared to normal cells."

Majority of ROS are produced as a by-product of oxidative phosphorylation, high levels of ROS are detected in almost all cancers.
-It is well established that during ER stress, cytosolic calcium released from the ER is taken up by the mitochondrion to stimulate ROS overgeneration and the release of cytochrome c, both of which lead to apoptosis.

Note: Products that may raise ROS can be found using this database, by:
Filtering on the target of ROS, and selecting the Effect Direction of ↑

Targets to raise ROS (to kill cancer cells):
• NADPH oxidases (NOX): NOX enzymes are involved in the production of ROS.
    -Targeting NOX enzymes can increase ROS levels and induce cancer cell death.
    -eNOX2 inhibition leads to a high NADH/NAD⁺ ratio which can lead to increased ROS
• Mitochondrial complex I: Inhibiting can increase ROS production
• P53: Activating p53 can increase ROS levels(by inducing the expression of pro-oxidant genes)
• Nrf2 inhibition: regulates the expression of antioxidant genes. Inhibiting Nrf2 can increase ROS levels
• Glutathione (GSH): an antioxidant. Depleting GSH can increase ROS levels
• Catalase: Catalase converts H2O2 into H2O+O. Inhibiting catalase can increase ROS levels
• SOD1: converts superoxide into hydrogen peroxide. Inhibiting SOD1 can increase ROS levels
• PI3K/AKT pathway: regulates cell survival and metabolism. Inhibiting can increase ROS levels
• HIF-1α inhibition: regulates genes involved in metabolism and angiogenesis. Inhibiting HIF-1α can increase ROS
• Glycolysis: Inhibiting glycolysis can increase ROS levels • Fatty acid oxidation: Cancer cells often rely on fatty acid oxidation for energy production.
-Inhibiting fatty acid oxidation can increase ROS levels
• ER stress: Endoplasmic reticulum (ER) stress can increase ROS levels
• Autophagy: process by which cells recycle damaged organelles and proteins.
-Inhibiting autophagy can increase ROS levels and induce cancer cell death.
• KEAP1/Nrf2 pathway: regulates the expression of antioxidant genes.
    -Inhibiting KEAP1 or activating Nrf2 can increase ROS levels and induce cancer cell death.
• DJ-1: regulates the expression of antioxidant genes. Inhibiting DJ-1 can increase ROS levels
• PARK2: regulates the expression of antioxidant genes. Inhibiting PARK2 can increase ROS levels
• SIRT1 inhibition:regulates the expression of antioxidant genes. Inhibiting SIRT1 can increase ROS levels
• AMPK activation: regulates energy metabolism and can increase ROS levels when activated.
• mTOR inhibition: regulates cell growth and metabolism. Inhibiting mTOR can increase ROS levels
• HSP90 inhibition: regulates protein folding and can increase ROS levels when inhibited.
• Proteasome: degrades damaged proteins. Inhibiting the proteasome can increase ROS levels
• Lipid peroxidation: a process by which lipids are oxidized, leading to the production of ROS.
    -Increasing lipid peroxidation can increase ROS levels
• Ferroptosis: form of cell death that is regulated by iron and lipid peroxidation.
    -Increasing ferroptosis can increase ROS levels
• Mitochondrial permeability transition pore (mPTP): regulates mitochondrial permeability.
    -Opening the mPTP can increase ROS levels
• BCL-2 family proteins: regulate apoptosis and can increase ROS levels when inhibited.
• Caspase-independent cell death: a form of cell death that is regulated by ROS.
    -Increasing caspase-independent cell death can increase ROS levels
• DNA damage response: regulates the repair of DNA damage. Increasing DNA damage can increase ROS
• Epigenetic regulation: process by which gene expression is regulated.
    -Increasing epigenetic regulation can increase ROS levels

-PKM2, but not PKM1, can be inhibited by direct oxidation of cysteine 358 as an adaptive response to increased intracellular reactive oxygen species (ROS)

ProOxidant Strategy:(inhibit the Mevalonate Pathway (likely will also inhibit GPx)
-HydroxyCitrate (HCA) found as supplement online and typically used in a dose of about 1.5g/day or more
-Atorvastatin typically 40-80mg/day, -Dipyridamole typically 200mg 2x/day Combined effect research
-Lycopene typically 100mg/day range (note debatable as it mainly lowers NRF2)

Dual Role of Reactive Oxygen Species and their Application in Cancer Therapy 
ROS-Inducing Interventions in Cancer — Canonical + Mechanistic Reference
-generated from AI and Cancer database
ROS rating:  +++ strong | ++ moderate | + weak | ± mixed | 0 none
NRF2:        ↓ suppressed | ↑ activated | ± mixed | 0 none
Conditions:  [D] dose  [Fe] metal  [M] metabolic  [O₂] oxygen
             [L] light [F] formulation [T] tumor-type [C] combination




Item ROS↑ NRF2 Condition Mechanism Class Remarks 



ROS">Piperlongumine
+++ ↓ [D][T] ROS-dominant






ROS">Shikonin
+++↓/±[D][T]ROS-dominant






ROS">Vitamin K3 (menadione)
+++↓[D]ROS-dominant






ROS">Copper (ionic / nano)
+++↓[Fe][F]ROS-dominant






ROS">Sodium Selenite
+++↓[D]ROS-dominant






ROS">Juglone
+++↓[D]ROS-dominant






ROS">Auranofin
+++↓[D]ROS-dominant






ROS">Photodynamic Therapy (PDT)
+++0[L][O₂]ROS-dominant






ROS">Radiotherapy / Radiation
+++0[O₂]ROS-dominant






ROS">Doxorubicin
+++↓[D]ROS-dominant






ROS">Cisplatin
++↓[D][T]ROS-dominant






ROS">Salinomycin
++↓[D][T]ROS-dominant






ROS">Artemisinin / DHA
++↓[Fe][T]ROS-dominant






ROS">Sulfasalazine
++↓[C][T]ROS-dominant






ROS">FMD / fasting
++↓[M][C][O₂]ROS-dominant






ROS">Vitamin C (pharmacologic)
++↓[Fe][D]ROS-dominant






ROS">Silver nanoparticles
++±[F][D]ROS-dominant






ROS">Gambogic acid
++↓[D][T]ROS-dominant






ROS">Parthenolide
++↓[D][T]ROS-dominant






ROS">Plumbagin
++↓[D]ROS-dominant






ROS">Allicin
++↓[D]ROS-dominant






ROS">Ashwagandha (Withaferin A)
++↓[D][T]ROS-dominant






ROS">Berberine
++↓[D][M]ROS-dominant






ROS">PEITC
++↓[D][C]ROS-dominant






ROS">Methionine restriction
+↓[M][C][T]ROS-secondary






ROS">DCA
+±[M][T]ROS-secondary






ROS">Capsaicin
+±[D][T]ROS-secondary






ROS">Galloflavin
+0[D]ROS-secondary






ROS">Piperine
+±[D][F]ROS-secondary






ROS">Propyl gallate
+↓[D]ROS-secondary






ROS">Scoulerine
+?[D][T]ROS-secondary






ROS">Thymoquinone
±±[D][T]Dual redox






ROS">Emodin
±±[D][T]Dual redox






ROS">Alpha-lipoic acid (ALA)
±↑[D][M]NRF2-dominant






ROS">Curcumin
±↑/↓[D][F]NRF2-dominant






ROS">EGCG
±↑/↓[D][O₂]NRF2-dominant






ROS">Quercetin
±↑/↓[D][Fe]NRF2-dominant






ROS">Resveratrol
±↑[D][M]NRF2-dominant






ROS">Sulforaphane
±↑↑[D]NRF2-dominant






ROS">Lycopene
0↑—Antioxidant






ROS">Rosmarinic acid
0↑—Antioxidant






ROS">Citrate
00—Neutral


Scientific Papers found: Click to Expand⟱
5954- CEL,    The molecular mechanisms of celecoxib in tumor development
- Review, Var, NA
TumCP↓, TumCMig↓, TumCI↓, COX2↓, p‑NF-kB↓, Akt↓, MMP2↓, MMP9↓, Apoptosis↑, mitResp↑, ER Stress↑, TumAuto↑, ChemoSen↑, Inflam↓, PGE2↓, chemoPv↑, toxicity↓, Risk↓, PI3K↓, RadioS↑, TumCMig↓, TumCI↓, cJun↓, Sp1/3/4↓, ROS↑, MMP↓, MPT↑, Ca+2↑, Glycolysis↓, ATP↓, CSCs↓, Wnt/(β-catenin)↓, EMT↓, toxicity↝,

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:


Redox & Oxidative Stress ⓘ

ROS↑, 1,  

Mitochondria & Bioenergetics ⓘ

ATP↓, 1,   mitResp↑, 1,   MMP↓, 1,   MPT↑, 1,  

Core Metabolism/Glycolysis ⓘ

Glycolysis↓, 1,  

Cell Death ⓘ

Akt↓, 1,   Apoptosis↑, 1,  

Kinase & Signal Transduction ⓘ

Sp1/3/4↓, 1,  

Transcription & Epigenetics ⓘ

cJun↓, 1,  

Protein Folding & ER Stress ⓘ

ER Stress↑, 1,  

Autophagy & Lysosomes ⓘ

TumAuto↑, 1,  

Proliferation, Differentiation & Cell State ⓘ

CSCs↓, 1,   EMT↓, 1,   PI3K↓, 1,   Wnt/(β-catenin)↓, 1,  

Migration ⓘ

Ca+2↑, 1,   MMP2↓, 1,   MMP9↓, 1,   TumCI↓, 2,   TumCMig↓, 2,   TumCP↓, 1,  

Immune & Inflammatory Signaling ⓘ

COX2↓, 1,   Inflam↓, 1,   p‑NF-kB↓, 1,   PGE2↓, 1,  

Drug Metabolism & Resistance ⓘ

ChemoSen↑, 1,   RadioS↑, 1,  

Functional Outcomes ⓘ

chemoPv↑, 1,   Risk↓, 1,   toxicity↓, 1,   toxicity↝, 1,  
Total Targets: 32

Pathway results for Effect on Normal Cells:


Total Targets: 0

Scientific Paper Hit Count for: ROS, Reactive Oxygen Species
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#:4  Target#:275  State#:%  Dir#:2
  wNotes=0  sortOrder:rid,rpid

 

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