3-bromopyruvate / toxicity Cancer Research Results

3BP, 3-bromopyruvate: Click to Expand ⟱
Features:
3BP, a small molecule, results in a remarkable therapeutic effect when it comes to treating cancers exhibiting a "Warburg effect."

3-Bromopyruvate — also written as 3BP or 3-BrPA — is a small, highly electrophilic pyruvate/lactate analog that acts as a metabolism-targeting alkylating agent (covalently modifying protein thiols) and is widely studied as an experimental anticancer compound. Functionally, it is best classified as a metabolic poison / anti-metabolite with multi-target effects centered on rapid ATP collapse (glycolysis + mitochondrial metabolism) and secondary oxidative and cell-death signaling. Cancer selectivity is often framed as higher uptake via MCT1 and higher reliance on glycolysis/Warburg metabolism, but the same chemical reactivity underlies a narrow safety margin unless formulated/delivered carefully.

Primary mechanisms (ranked):

  1. Covalent thiol alkylation of energy-metabolism enzymes (notably glycolytic nodes such as HK2 and other thiol-sensitive enzymes) → rapid ATP depletion
  2. Mitochondrial bioenergetic disruption (OXPHOS inhibition, permeability/ΔΨm collapse) → energetic crisis
  3. MCT1-facilitated uptake (context-dependent determinant of sensitivity and “selectivity”)
  4. Oxidative stress induction and redox-buffer depletion (ROS↑; GSH/thiols↓) (secondary but often decisive)
  5. Stress-response execution programs (AMPK activation; apoptosis/autophagy; ferroptosis context-dependent; sensitization to other therapies)

Bioavailability / PK relevance: Unformulated 3BP is chemically reactive and can be systemically toxic; practical translation has focused on formulation (e.g., cyclodextrin/microencapsulation) and/or locoregional delivery to improve tolerability and tumor exposure. Uptake can depend on transporter context (e.g., MCT1 expression) and extracellular pH/lactate milieu (context-dependent).

In-vitro vs systemic exposure relevance: Many in-vitro studies use µM–mM ranges; higher (mM) conditions may exceed what is plausibly achievable systemically without toxicity. Reported activity at low µM exists in some models (especially with optimized derivatives/formulations), but exposure/target-engagement in humans remains the central constraint.

Clinical evidence status: Not an approved drug. Evidence is predominantly preclinical (cell/animal). Human use has been limited and controversial, including safety incidents reported in non-standard clinical settings. A 3BP-derived clinical agent (e.g., KAT/3BP / KAT-101) is in early-phase clinical testing (HCC), but that is distinct from generic/unformulated 3BP.

Overall, 3BP attacks cancer cells by “starving” them of energy, leading to energetic collapse, oxidative damage, and eventual cell death.

- 3BP is known to inhibit enzymes involved in glycolysis, such as hexokinase II (HKII). Many cancer cells overexpress HKII and rely on glycolysis for ATP production. Inhibiting HKII leads to decreased ATP levels and energy depletion.
- Fermentation inhibitor:(inhibits conversion of pyruvate to lactate) NAD+ is compromised slowing Glycolysis leading to reduced ATP
- By depleting ATP, 3BP can impair mitochondrial functions indirectly.
- LDH converts pyruvate to lactate. In many cancers, lactate production is high (the Warburg effect). Inhibition of LDH disrupts lactate production and may contribute to an intracellular buildup of toxic metabolites.
- There is evidence indicating that, by interfering with glycolysis, 3BP might also indirectly affect the PPP. This reduces the production of NADPH, weakening the cancer cell’s ability to manage oxidative stress.
- Impairing energy metabolism, 3BP can indirectly affect mitochondrial function, potentially leading to an increase in ROS production.

Although 3BP shows promise as a metabolic inhibitor with anticancer properties, its transition from preclinical studies to approved clinical therapy has not yet been realized.

-Combining metabolic inhibitors like 3BP with agents that modulate ROS levels could represent a synergistic approach in cancer therapy. By simultaneously disrupting energy production and exacerbating oxidative stress, such combinations may more effectively induce cancer cell death while sparing normal cells.

In advanced cancer it has been known to kill the cancer too fast, causing liver failure and death.

3-Bromopyruvate (3BP, 3-BrPA) — mechanistic axes (oncology)

Rank Pathway / Axis Cancer Cells Normal Cells TSF Primary Effect Notes / Interpretation
1 Glycolysis inhibition via thiol-alkylation of glycolytic enzymes ↓ glycolytic flux; ↓ ATP (often rapid) ↔ to ↓ (model-dependent) P/R Energetic collapse Often framed around HK2, but 3BP is broadly thiol-reactive; glycolysis collapse is a convergent phenotype rather than a single-enzyme story.
2 Mitochondrial bioenergetics disruption ↓ OXPHOS; ↓ ΔΨm; ↑ MPTP (context-dependent) ↔ to ↓ (dose-dependent) P/R ATP depletion + mitochondrial stress Dual hit (glycolysis + mitochondria) is a major reason for potency in high-glycolytic tumors; also a toxicity driver if exposure is systemic.
3 MCT1-dependent uptake ↑ uptake and sensitivity when MCT1-high ↔ (varies by tissue MCT1) P Determinant of selectivity MCT1 has been shown as a key sensitivity node in multiple models; “selectivity” claims are strongest when transporter context is documented.
4 Redox buffering and thiol pool depletion ↓ GSH/thiols; redox crisis ↔ to ↓ (dose-dependent) R/G Lowered antioxidant capacity Because 3BP alkylates thiols, GSH depletion can be both direct and indirect; can amplify downstream death pathways and resistance phenotypes.
5 ROS axis ↑ ROS (often); oxidative damage (context-dependent) ↔ (dose- and context-dependent) R Oxidative stress amplification ROS changes are frequently secondary to mitochondrial disruption + thiol depletion; can be decisive for apoptosis/ferroptosis engagement.
6 AMPK energy-stress signaling ↑ AMPK; ↓ anabolic signaling (context-dependent) ↑ AMPK (protective or adaptive) R Stress adaptation vs death priming Energetic collapse typically triggers AMPK; downstream outcomes depend on baseline metabolic state and co-treatments.
7 Cell-death programs: apoptosis and autophagy ↑ apoptosis; ↑ autophagy (context-dependent) ↔ to ↑ stress responses G Execution of cytotoxicity Multiple reports show mixed death phenotypes; autophagy can be cytoprotective or contribute to death depending on context and timing.
8 Ferroptosis axis ↑ ferroptosis susceptibility (context-dependent) ↔ (context-dependent) G Lipid-peroxidation-driven death Most consistent when redox buffering is weakened and/or combined with agents that tilt iron/lipid-ROS balance.
9 NRF2 axis ↔ (model-dependent; often stress-activated) ↔ (model-dependent) G Adaptive antioxidant response NRF2 behavior varies: oxidative stress can activate NRF2, but thiol-alkylation/redox collapse can also overwhelm defenses; treat as context-dependent.
10 Chemosensitization / radiosensitization ↑ sensitization (context-dependent) ↔ R/G Combination leverage Reported synergy with targeted therapy/chemo/radiation in some models, typically via metabolic stress + redox imbalance.
11 Clinical Translation Constraint Formulation/delivery-limited; systemic toxicity risk Off-target injury risk — Therapeutic index limitation Unformulated 3BP has significant toxicity concerns; translation efforts emphasize formulation (e.g., cyclodextrin/microencapsulation) and/or locoregional strategies and derivatives now entering early clinical trials.


toxicity, toxicity: Click to Expand ⟱
Source:
Type:
Toxicity
Scientific Papers found: Click to Expand⟱
5269- 3BP,    The anti-metabolite KAT/3BP has in vitro and in vivo anti-tumor activity in lymphoma models.
- in-vitro, HCC, NA
toxicity↑, 3-Bromopyruvate (3BP), a small alkylating agent, acts as an anti-metabolite to vital substrates in cancer metabolism and exhibits antitumor activity across various cancer types, but the unformulated 3BP can cause high toxicity
eff↝, This study explores the efficacy of the 3BP clinical derivative KAT/3BP, currently in phase 1 for patients with hepatocellular carcinoma, in lymphoma models.
eff↑, AT/3BP exhibited synergistic activity when combined with lymphoma therapies, including bendamustine and R-CHOP.
Glycolysis↓, At acidic extracellular pH, 3BP enters cancer cells via monocarboxylic acid-1 (MCT-1) and inhibits glycolysis through hexokinase II (HK-2) covalent modification
HK2↓, with HK-2 inhibition and dissociation from mitochondria, apoptosis-inducing factor (AIF) release, and apoptosis induction (9).
AIF↑,
Apoptosis↑,
NK cell↑, In the latter, tumor growth was in vivo reversed, with an increase in the number of circulating CD4+, CD8+, and NK- cells
toxicity↑, unformulated 3BP administrations are associated with severe toxicities, including deaths (22,23)
toxicity↓, However, improvements have been made in developing novel 3BP formulations based on liposomes, polyethylene glycol (PEG), PEGylated liposomes (stealth liposomes), perillyl alcohol formulations, and others (12,22,24
Dose↝, KAT-101 and KAT-201 are two clinical 3BP derivatives formulated for oral or intratumoral (IT) administration, respectively (National Cancer Institute Thesaurus Codes C193479 and C193479), now entering the early clinical evaluation of patients with h
AntiTum↑, KAT/3BP has in vivo antitumor activity in a syngeneic mouse model.

5278- 3BP,    The effect of 3-bromopyruvate on human colorectal cancer cells is dependent on glucose concentration but not hexokinase II expression
- in-vitro, CRC, HCT116 - in-vitro, CRC, Caco-2 - in-vitro, CRC, SW48
ATP↓, 3-Bromopyruvate (3BP) is a pyruvate analogue with alkylating properties that depletes cellular ATP levels and induces rapid cell death in neoplastic cells with limited cytotoxic effects against normal cells.
TumCD↑,
selectivity↑,
toxicity↓, 3BP treatment led to eradication of tumours of hepatocellular carcinoma cell origin in rats without apparent cytotoxic effects [19]
OS↑, first human case report suggested that 3BP was able to prolong survival in a cancer patient diagnosed with hepatocellular carcinoma in 2012 [19,20].
HK2?, 3BP is able to dissociate and inhibit mitochondrial HKII function, thereby reducing ATP production. 3BP binding also frees up binding sites previously occupied by HKII
Cyt‑c↑, llowing pro-apoptotic molecules (such as BAX and BAD) to promote the release of cytochrome c into the cytosol and induce eventual cell death
eff↑, Raji lymphoma cells grown under hypoxic conditions were more sensitive to 3BP than in normoxia
p‑Akt↑, 3BP induces rapid AKT phosphorylation at residue Thr-308

5274- 3BP,    ME3BP-7 is a targeted cytotoxic agent that rapidly kills pancreatic cancer cells expressing high levels of monocarboxylate transporter MCT1
- in-vitro, PC, NA
eff↑, novel microencapsulated formulation of 3BP (ME3BP-7), which is effective against a variety of PDAC cells in vitro and remains stable in serum.
TumCG↓, Furthermore, systemically administered ME3BP-7 significantly reduces pancreatic cancer growth and metastatic spread in multiple orthotopic models of pancreatic cancer with manageable toxicity.
TumMeta↓,
toxicity↝,
Glycolysis↓, The anticancer effects of 3BP were initially attributed to inhibition of glycolysis (Ganapathy-Kanniappan et al., 2009;
toxicity↓, Our previous work demonstrated that microencapsulation of 3BP reduces its toxicity (Chapiro et al., 2014).
Dose↝, we were only able to reliably deliver multiple doses of the drug intravenously (i.v.), and the number of injections and time periods over which we could administer the drug were limited.

5260- 3BP,    Systemic Delivery of Microencapsulated 3-Bromopyruvate for the Therapy of Pancreatic Cancer
- in-vivo, PC, NA
TumCG↓, In vivo, animals treated with β-CD–3-BrPA demonstrated minimal or no tumor progression as evident by the BLI signal
toxicity↓, In contrast to animals treated with free 3-BrPA, no lethal toxicity was observed for β-CD–3-BrPA.
BioAv↝, It is possible that in the microencapsulated formulation, 3-BrPA, is more bioavailable for uptake into tumor cells and less available to the normal cells that apparently mediate its toxicity
GAPDH↓, 3-Bromopyruvate (3-BrPA), a highly potent small-molecular inhibitor of the enzyme GAPDH, represents the only available antiglycolytic drug candidate that is able to enter cancer cells selectively through the monocarboxylate transporter 1 (MCT1; refs.
toxicity↑, However, due to its alkylating properties, 3-BrPA is associated with significant toxicity when delivered systemically in therapeutic doses, which has impeded the clinical development and use of this drug in patients with cancer
Dose↝, Encapsulation of 3-BrPA in β-CD was achieved by portionwise addition of 3-BrPA (166 mg, 1 mmol/L) to a stirring solution of β-CD (1,836 mg in 30 mL DI water). The resulting solution was sonicated for 1 hour at room temperature and then shaken overnig
ATP↓, ability of microencapsulated 3-BrPA (β-CD-3-BrPA) to achieve dose-dependent ATP depletion and cell death, two human pancreatic cancer cell lines were employed.
eff↑, both PDAC cell lines were more sensitive to the drugs when hypoxic (Fig. 2)
TumCI↓, MiaPaCa-2 and Suit-2 cells showed a reduction in invasion at drug concentrations as low as 12.5 µmol/L.
MMP9↓, marked reduction in the secretion of MMP-9 was detected in both cell lines.
toxicity↓, No organ toxicities or tissue damage was observed in animals treated with β-CD–3-BrPA

5259- 3BP,    Advanced cancers: eradication in all cases using 3-bromopyruvate therapy to deplete ATP
- in-vivo, HCC, NA
ATP↓, Advanced cancers (2-3cm) developed and were treated with the alkylating agent 3-bromopyruvate, a lactate/pyruvate analog shown here to selectively deplete ATP and induce cell death.
TumCD↑,
toxicity↓, In all 19 treated animals advanced cancers were eradicated without apparent toxicity or recurrence.
eff↑, These findings attest to the feasibility of completely destroying advanced, highly glycolytic cancers.
tumCV↓, The chemical agent 3-BrPA depletes ATP stores and inhibits HCC cell viability
Dose↝, administered eight treatments on successive days with 1 ml of 2 mM 3-BrPA, also in 1· PBS, pH 7.5. Injection of 3-BrPA was into the tumor.

1341- 3BP,    The HK2 Dependent “Warburg Effect” and Mitochondrial Oxidative Phosphorylation in Cancer: Targets for Effective Therapy with 3-Bromopyruvate
- Review, NA, NA
Glycolysis↓, second-generation glycolysis inhibitor.
OXPHOS↓,
*toxicity↓, Normal cells remain unharmed
ROS↑, well known that this compound generates ROS
GSH↓,
eff↑, 3BP demonstrates synergistic activity with other compounds that reduce intracellular levels of GSH


Showing Research Papers: 1 to 6 of 6

* indicates research on normal cells as opposed to diseased cells
Total Research Paper Matches: 6

Pathway results for Effect on Cancer / Diseased Cells:


Redox & Oxidative Stress ⓘ

GSH↓, 1,   OXPHOS↓, 1,   ROS↑, 1,  

Mitochondria & Bioenergetics ⓘ

AIF↑, 1,   ATP↓, 3,  

Core Metabolism/Glycolysis ⓘ

GAPDH↓, 1,   Glycolysis↓, 3,   HK2?, 1,   HK2↓, 1,  

Cell Death ⓘ

p‑Akt↑, 1,   Apoptosis↑, 1,   Cyt‑c↑, 1,   TumCD↑, 2,  

Transcription & Epigenetics ⓘ

tumCV↓, 1,  

Proliferation, Differentiation & Cell State ⓘ

TumCG↓, 2,  

Migration ⓘ

MMP9↓, 1,   TumCI↓, 1,   TumMeta↓, 1,  

Immune & Inflammatory Signaling ⓘ

NK cell↑, 1,  

Drug Metabolism & Resistance ⓘ

BioAv↝, 1,   Dose↝, 4,   eff↑, 6,   eff↝, 1,   selectivity↑, 1,  

Functional Outcomes ⓘ

AntiTum↑, 1,   OS↑, 1,   toxicity↓, 6,   toxicity↑, 3,   toxicity↝, 1,  
Total Targets: 29

Pathway results for Effect on Normal Cells:


Functional Outcomes ⓘ

toxicity↓, 1,  
Total Targets: 1

Scientific Paper Hit Count for: toxicity, toxicity
6 3-bromopyruvate
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#:20  Target#:1025  State#:%  Dir#:1
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