Betulinic acid / Casp3 Cancer Research Results

BetA, Betulinic acid: Click to Expand ⟱
Features:
Betulinic acid "buh-TOO-li-nik acid" is a natural compound with antiretroviral, anti malarial, anti-inflammatory and anticancer properties. It is found in the bark of several plants, such as white birch, ber tree and rosemary, and has a complex mode of action against tumor cells.
-Betulinic acid is a naturally occurring pentacyclic triterpenoid
-vitro concentrations range from 1–100 µM, in vivo studies in rodents have generally used doses from 10–100 mg/kg
Precursor: Betulin, via oxidation at C-28
Lipophilicity: High (poor aqueous solubility)

Betulinic acid — Betulinic acid is a naturally occurring lupane-type pentacyclic triterpenoid with broad experimental anticancer activity, especially against melanoma, neuroectodermal, glioma, breast, colorectal, and other solid-tumor models. It is a natural-product small molecule, usually abbreviated BA or BetA, and is found in several plants, classically birch bark, with semi-synthesis commonly starting from betulin. A distinguishing feature is preferential induction of tumor-cell death through direct mitochondrial injury with relative sparing of many non-neoplastic cells in preclinical systems. Its main translational limitation is very poor aqueous solubility with correspondingly weak oral/systemic developability unless formulation or derivatization is used.

Primary mechanisms (ranked):

  1. Direct mitochondrial membrane permeabilization with intrinsic apoptosis activation
  2. Mitochondrial ROS increase with collapse of mitochondrial membrane potential and cytochrome c release
  3. ER-stress and unfolded-protein-response activation, including GRP78-linked stress signaling
  4. Suppression of NF-κB and other pro-survival transcriptional programs, including Sp-family signaling in some models
  5. Cell-cycle arrest with reduced cyclin/CDK signaling
  6. Anti-migratory and anti-invasive effects via EMT, FAK, ROCK1, MMP, and cytoskeletal remodeling pathways
  7. Secondary metabolic suppression of aerobic glycolysis and hypoxia-response signaling in susceptible models
  8. Adjunct sensitization to chemo- or radiotherapy in selected preclinical settings

Bioavailability / PK relevance: Betulinic acid is highly lipophilic and poorly water-soluble, which strongly limits oral absorption and systemic exposure. PK behavior is formulation-dependent, and much of the translational literature focuses on nanoparticles, liposomes, micelles, conjugates, or topical delivery rather than conventional oral dosing.

In-vitro vs systemic exposure relevance: Many in-vitro anticancer studies use low-to-mid micromolar concentrations, which are often difficult to reproduce reliably in vivo with unformulated parent betulinic acid. Accordingly, mechanistic findings are useful biologically, but direct concentration matching to standard oral/systemic use is often poor unless enhanced-delivery systems are used.

Clinical evidence status: Strong preclinical and formulation-development literature; very limited human oncology evidence. Cancer-facing clinical development appears to remain early-phase/topical, with orphan designation for topical metastatic melanoma but no FDA approval for that indication. Betulinic acid itself is not an established approved anticancer drug.

-half-life reports vary 3-5 hrs?. Reported half-life varies by formulation and species; several studies report multi-hour systemic persistence.
BioAv -hydrophobic molecule with relatively poor water solubility. 
Main Cancer action
-Direct mitochondrial targeting in cancer cells
-Minimal effect on normal cells

Key pathways
-Mitochondrial membrane permeabilization
-ROS-mediated apoptosis
-Caspase-independent death

Chemo relevance: Generally compatible, Not a redox buffer

Pathways:
- often induce ROS production
- ROS↑ related: MMP↓(ΔΨm), ER Stress↑, UPR↑, GRP78↑, Ca+2↑, Cyt‑c↑, Caspases↑, DNA damage↑, cl-PARP↑, HSP↓
- Lowers AntiOxidant defense in Cancer Cells(Often associated with reduced redox buffering capacity in tumor cells (e.g., GSH depletion); NRF2 direction model-dependent.): NRF2↓, SOD↓, GSH↓
- May Raise AntiOxidant defense in Normal Cells: NRF2↑, SOD↑, GSH↑, Catalase↑ Reports suggest relative sparing of normal cells and preservation of antioxidant capacity in some models
- lowers Inflammation : NF-kB↓(typ), COX2↓, p38↓ (context-dependent; often stress-activated), Pro-Inflammatory Cytokines : IL-1β↓, TNF-α↓, IL-6↓, IL-8↓
- inhibit Growth/Metastases : , MMPs↓, MMP2↓, MMP9↓, TIMP2, IGF-1↓, VEGF↓, ROCK1↓, FAK↓, NF-κB↓, TGF-β↓, α-SMA↓, ERK↓
- reactivate genes thereby inhibiting cancer cell growth : P53↑, HSP↓(model-dependent), Sp proteins↓,
- cause Cell cycle arrest : TumCCA↑, cyclin D1↓, CDK2↓, CDK4↓,
- inhibits Migration/Invasion : TumCMig↓, TumCI↓, FAK↓, ERK↓, EMT↓, TOP1↓,
- inhibits glycolysis (secondary to mitochondrial stress) ATP depletion : HIF-1α↓, PKM2↓, cMyc↓, GLUT1↓, LDH↓, LDHA↓, HK2↓, PFKs↓, PDKs↓, HK2↓, ECAR↓, GRP78↑(ER stress), GlucoseCon↓
- inhibits angiogenesis↓ : VEGF↓, HIF-1α↓, EGFR↓,
- inhibits Cancer Stem Cells in some studies : CSC↓, GLi1↓, β-catenin↓, OCT4↓,
- Others: PI3K↓(typ), AKT↓(typ), JAK↓, STAT↓, β-catenin↓, AMPK↓(AMPK is often activated during metabolic stress), ERK↓, JNK,
- Synergies: chemo-sensitization, chemoProtective, RadioSensitizer, Others(review target notes), Neuroprotective, Cognitive, Renoprotection, Hepatoprotective, CardioProtective,
- Selectivity: Cancer Cells vs Normal Cells

Mechanistic profile

Rank Pathway / Axis Cancer Cells Normal Cells TSF Primary Effect Notes / Interpretation
1 Mitochondrial permeabilization ↑ MOMP, ↓ ΔΨm, ↑ cytochrome c release, ↑ apoptosis ↔ / milder effect P-R Core tumor-selective death trigger Best-supported central mechanism; helps explain activity in apoptosis-competent but therapy-resistant tumors.
2 Mitochondrial ROS increase ↑ ROS ↔ / possible antioxidant sparing (context-dependent) P-R Amplifies mitochondrial stress and death signaling ROS appears mechanistically relevant in many tumor models, but not every study makes it the dominant initiating event.
3 Caspase axis and caspase-independent death ↑ caspase-9, ↑ caspase-3, ↑ PARP cleavage; caspase-independent death also reported ↔ R-G Executes apoptosis after mitochondrial injury BA can still kill some tumor cells when classical caspase execution is partly blocked, indicating non-canonical death contribution.
4 ER stress / UPR / GRP78 ↑ ER stress, ↑ UPR, ↑ GRP78 stress signaling ↔ R-G Links proteostatic stress to apoptosis and metastasis suppression Especially relevant in breast and gastric cancer models; may also connect to metabolic suppression and chemosensitization.
5 NF-κB survival signaling ↓ NF-κB ↔ / ↓ inflammatory tone R-G Reduces survival, inflammatory, and resistance programs Common downstream convergence node across several tumor types.
6 Cell-cycle machinery ↓ cyclin D1, ↓ CDK2, ↓ CDK4, ↑ cell-cycle arrest ↔ G Slows proliferation Usually supportive rather than primary; often follows stress and survival-pathway disruption.
7 EMT / invasion / matrix remodeling ↓ EMT, ↓ FAK, ↓ ROCK1, ↓ MMP2, ↓ MMP9, ↓ migration, ↓ invasion ↔ G Antimetastatic effect Consistent with reduced motility and invasive phenotype in multiple solid-tumor models.
8 Glycolysis ↓ glucose uptake, ↓ lactate, ↓ ECAR, ↓ HK2, ↓ PKM2, ↓ LDHA ↔ G Secondary metabolic suppression Not the universal initiating mechanism; appears important in selected breast-cancer and GRP78-linked systems.
9 HIF-1α hypoxia axis ↓ HIF-1α, ↓ VEGF, ↓ GLUT1, ↓ PDK1 ↔ G Reduces hypoxic adaptation and angiogenic drive Relevant in hypoxic tumor biology and helps explain antiangiogenic/metabolic effects in some models.
10 NRF2 / antioxidant buffering ↓ NRF2 or ↓ redox buffering (model-dependent) ↔ / possible preservation of antioxidant tone (context-dependent) R-G May widen tumor redox vulnerability Direction is not uniform across all models; safer to treat this as contextual rather than universally core.
11 Ca²⁺ stress ↑ Ca²⁺ (context-dependent) ↔ P-R Supports organelle stress and apoptotic signaling Usually part of the broader mitochondrial/ER stress network rather than a stand-alone primary target.
12 Radiosensitization or Chemosensitization ↑ sensitivity to radiation or selected drugs Unclear G Adjunct leverage Preclinical evidence supports additive or sensitizing effects with irradiation and with some chemotherapy settings, but this is not yet clinically established.
13 Clinical Translation Constraint Poor solubility and limited systemic exposure constrain reproducibility Same formulation constraint G Delivery bottleneck Main barrier is not lack of mechanistic richness but drug-like exposure; translation currently depends heavily on formulation, derivatization, or topical/local use.

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

  • P: 0–30 min (primary/physical-chemical effects; rapid kinase/redox signaling)
  • R: 30 min–3 hr (acute redox and stress-response activation)
  • G: >3 hr (gene-regulatory adaptation and phenotypic outcomes)
Casp3, CPP32, Cysteinyl aspartate specific proteinase-3: Click to Expand ⟱
Source:
Type:
Also known as CP32.
Cysteinyl aspartate specific proteinase-3 (Caspase-3) is a common key protein in the apoptosis and pyroptosis pathways, and when activated, the expression level of tumor suppressor gene Gasdermin E (GSDME) determines the mechanism of tumor cell death.
As a key protein of apoptosis, caspase-3 can also cleave GSDME and induce pyroptosis. Loss of caspase activity is an important cause of tumor progression.
Many anticancer strategies rely on the promotion of apoptosis in cancer cells as a means to shrink tumors. Crucial for apoptotic function are executioner caspases, most notably caspase-3, that proteolyze a variety of proteins, inducing cell death. Paradoxically, overexpression of procaspase-3 (PC-3), the low-activity zymogen precursor to caspase-3, has been reported in a variety of cancer types. Until recently, this counterintuitive overexpression of a pro-apoptotic protein in cancer has been puzzling. Recent studies suggest subapoptotic caspase-3 activity may promote oncogenic transformation, a possible explanation for the enigmatic overexpression of PC-3. Herein, the overexpression of PC-3 in cancer and its mechanistic basis is reviewed; collectively, the data suggest the potential for exploitation of PC-3 overexpression with PC-3 activators as a targeted anticancer strategy.
Caspase 3 is the main effector caspase and has a key role in apoptosis. In many types of cancer, including breast, lung, and colon cancer, caspase-3 expression is reduced or absent.
On the other hand, some studies have shown that high levels of caspase-3 expression can be associated with a better prognosis in certain types of cancer, such as breast cancer. This suggests that caspase-3 may play a role in the elimination of cancer cells, and that therapies aimed at activating caspase-3 may be effective in treating certain types of cancer.
Procaspase-3 is a apoptotic marker protein.
Prognostic significance:
• High Cas3 expression: Associated with good prognosis and increased sensitivity to chemotherapy in breast, gastric, lung, and pancreatic cancers.
• Low Cas3 expression: Linked to poor prognosis and increased risk of recurrence in colorectal, hepatocellular carcinoma, ovarian, and prostate cancers.
Scientific Papers found: Click to Expand⟱
2755- BetA,    Cytotoxic Potential of Betulinic Acid Fatty Esters and Their Liposomal Formulations: Targeting Breast, Colon, and Lung Cancer Cell Lines
- in-vitro, Colon, HT29 - in-vitro, BC, MCF-7 - in-vitro, Lung, H460
eff↑, Casp3↑, Casp7↑, NF-kB↓,
2752- BetA,    Betulinic acid: a natural product with anticancer activity
- Review, Var, NA
selectivity↑, ChemoSen↑, RadioS↑, MMP↓, cl‑Casp3↑, Cyt‑c↑, ROS↑, NF-kB↑, TOP1↓,
5592- BetA,    Betulin induces mitochondrial cytochrome c release associated apoptosis in human cancer cells
- in-vitro, Liver, HepG2 - in-vitro, Cerv, HeLa
Casp3↑, Casp9↑, cl‑PARP↑, Apoptosis↑, Cyt‑c↑, MMP↓,
5591- BetA,    Advances and challenges in betulinic acid therapeutics and delivery systems for breast cancer prevention and treatment
- Review, BC, NA
BioAv↓, BioAv↑, selectivity↑, eff↑, angioG↓, *antiOx↑, *Inflam↓, MMP↓, Bcl-2↓, BAX↑, Casp9↑, Casp3↑, GRP78/BiP?, ER Stress↑, PERK↑, CHOP↑, ChemoSen↑, SESN2↑, ROS↑, MOMP↓, MAPK↑, Cyt‑c↑, AIF↑, STAT3↓, FAK↓, TIMP2↑, TumCMig↓, TumCI↓, Sp1/3/4↓, TumCCA↑, DNAdam↑,
2722- BetA,    Betulinic Acid for Cancer Treatment and Prevention
- Review, Var, NA
MMP↓, Cyt‑c↑, cl‑Casp3↑, cl‑Casp8↑, ROS↑, NF-kB↑, TOP1↓,
2729- BetA,    Betulinic acid in the treatment of tumour diseases: Application and research progress
- Review, Var, NA
ChemoSen↑, mt-ROS↑, STAT3↓, NF-kB↓, selectivity↑, *toxicity↓, eff↑, GRP78/BiP↑, MMP2↓, P90RSK↓, TumCI↓, EMT↓, MALAT1↓, Glycolysis↓, AMPK↑, Sp1/3/4↓, Hif1a↓, angioG↓, NF-kB↑, NF-kB↓, MMP↓, Cyt‑c↑, Casp9↑, Casp3↑, RadioS↑, PERK↑, CHOP↑, *toxicity↓,
2719- BetA,    Betulinic Acid Restricts Human Bladder Cancer Cell Proliferation In Vitro by Inducing Caspase-Dependent Cell Death and Cell Cycle Arrest, and Decreasing Metastatic Potential
- in-vitro, CRC, T24/HTB-9 - in-vitro, Bladder, UMUC3 - in-vitro, Bladder, 5637
TumCD↑, Apoptosis↑, TumCCA↑, CycB/CCNB1↓, cycA1/CCNA1↓, CDK2↓, CDC25↓, mtDam↑, BAX↑, cl‑PARP↑, Casp3↑, Casp8↑, Casp9↑, Snail↓, Slug↓, MMP9↓, selectivity↑, MMP↓, ROS∅, TumCMig↓, TumCI↓,
2718- BetA,    The anti-cancer effect of betulinic acid in u937 human leukemia cells is mediated through ROS-dependent cell cycle arrest and apoptosis
- in-vitro, AML, U937
TumCCA↑, Apoptosis↑, i-ROS↑, cycA1/CCNA1↓, CycB/CCNB1↓, P21↑, Cyt‑c↑, MMP↓, Bax:Bcl2↑, Casp9↑, Casp3↑, PARP↓, eff↓, *antiOx↑, *Inflam↓, *hepatoP↑, selectivity↑, NF-kB↓, *ROS↓,
2717- BetA,    Betulinic Acid Induces ROS-Dependent Apoptosis and S-Phase Arrest by Inhibiting the NF-κB Pathway in Human Multiple Myeloma
- in-vitro, Melanoma, U266 - in-vivo, Melanoma, NA - in-vitro, Melanoma, RPMI-8226
Apoptosis↑, TumCCA↑, MMP↓, ROS↑, eff↓, NF-kB↓, Cyt‑c↑, Casp3↑, Casp8↑, Casp9↑, cl‑PARP1↑, MDA↑, SOD↓, SOD2↓, GCLM↓, GSTA1↓, FTH1↓, GSTs↓, TumVol↓,
2744- BetA,    Betulin and betulinic acid: triterpenoids derivatives with a powerful biological potential
- Review, Var, NA
Apoptosis↓, TumCCA↑, Casp9↑, Casp3↑, Casp7↑, cl‑PARP↑, MMP↓, ROS↑, TOP1↓, NF-kB↓,
2734- BetA,    Betulinic Acid Modulates the Expression of HSPA and Activates Apoptosis in Two Cell Lines of Human Colorectal Cancer
- in-vitro, CRC, HCT116 - in-vitro, CRC, SW480
tumCV↓, HSP70/HSPA5⇅, ROS↑, cl‑Casp3↑, mt-Apoptosis↑, Dose↝,
2733- BetA,    Betulinic Acid Inhibits Cell Proliferation in Human Oral Squamous Cell Carcinoma via Modulating ROS-Regulated p53 Signaling
- in-vitro, Oral, KB - in-vivo, NA, NA
TumCP↓, TumVol↓, mt-Apoptosis↑, Casp3↑, Casp9↑, BAX↑, Bcl-2↑, OCR↓, TumCCA↑, ROS↑, eff↓, P53↑, STAT3↓, cycD1/CCND1↑,

Showing Research Papers: 1 to 12 of 12

* indicates research on normal cells as opposed to diseased cells
Total Research Paper Matches: 12

Pathway results for Effect on Cancer / Diseased Cells:


Redox & Oxidative Stress ⓘ

GCLM↓, 1,   GSTA1↓, 1,   GSTs↓, 1,   MDA↑, 1,   ROS↑, 7,   ROS∅, 1,   i-ROS↑, 1,   mt-ROS↑, 1,   SOD↓, 1,   SOD2↓, 1,  

Metal & Cofactor Biology ⓘ

FTH1↓, 1,  

Mitochondria & Bioenergetics ⓘ

AIF↑, 1,   CDC25↓, 1,   MMP↓, 9,   mtDam↑, 1,   OCR↓, 1,  

Core Metabolism/Glycolysis ⓘ

AMPK↑, 1,   Glycolysis↓, 1,  

Cell Death ⓘ

Apoptosis↓, 1,   Apoptosis↑, 4,   mt-Apoptosis↑, 2,   BAX↑, 3,   Bax:Bcl2↑, 1,   Bcl-2↓, 1,   Bcl-2↑, 1,   Casp3↑, 9,   cl‑Casp3↑, 3,   Casp7↑, 2,   Casp8↑, 2,   cl‑Casp8↑, 1,   Casp9↑, 8,   Cyt‑c↑, 7,   MAPK↑, 1,   MOMP↓, 1,   TumCD↑, 1,  

Kinase & Signal Transduction ⓘ

Sp1/3/4↓, 2,  

Transcription & Epigenetics ⓘ

tumCV↓, 1,  

Protein Folding & ER Stress ⓘ

CHOP↑, 2,   ER Stress↑, 1,   GRP78/BiP?, 1,   GRP78/BiP↑, 1,   HSP70/HSPA5⇅, 1,   PERK↑, 2,  

Autophagy & Lysosomes ⓘ

SESN2↑, 1,  

DNA Damage & Repair ⓘ

DNAdam↑, 1,   P53↑, 1,   PARP↓, 1,   cl‑PARP↑, 3,   cl‑PARP1↑, 1,  

Cell Cycle & Senescence ⓘ

CDK2↓, 1,   cycA1/CCNA1↓, 2,   CycB/CCNB1↓, 2,   cycD1/CCND1↑, 1,   P21↑, 1,   TumCCA↑, 6,  

Proliferation, Differentiation & Cell State ⓘ

EMT↓, 1,   P90RSK↓, 1,   STAT3↓, 3,   TOP1↓, 3,  

Migration ⓘ

FAK↓, 1,   MALAT1↓, 1,   MMP2↓, 1,   MMP9↓, 1,   Slug↓, 1,   Snail↓, 1,   TIMP2↑, 1,   TumCI↓, 3,   TumCMig↓, 2,   TumCP↓, 1,  

Angiogenesis & Vasculature ⓘ

angioG↓, 2,   Hif1a↓, 1,  

Immune & Inflammatory Signaling ⓘ

NF-kB↓, 6,   NF-kB↑, 3,  

Drug Metabolism & Resistance ⓘ

BioAv↓, 1,   BioAv↑, 1,   ChemoSen↑, 3,   Dose↝, 1,   eff↓, 3,   eff↑, 3,   RadioS↑, 2,   selectivity↑, 5,  

Functional Outcomes ⓘ

TumVol↓, 2,  
Total Targets: 82

Pathway results for Effect on Normal Cells:


Redox & Oxidative Stress ⓘ

antiOx↑, 2,   ROS↓, 1,  

Immune & Inflammatory Signaling ⓘ

Inflam↓, 2,  

Functional Outcomes ⓘ

hepatoP↑, 1,   toxicity↓, 2,  
Total Targets: 5

Scientific Paper Hit Count for: Casp3, CPP32, Cysteinyl aspartate specific proteinase-3
12 Betulinic acid
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#:42  Target#:42  State#:%  Dir#:2
  wNotes=0  sortOrder:rid,rpid

 

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