Gambogic Acid / ER Stress Cancer Research Results

GamB, Gambogic Acid: Click to Expand ⟱
Features:
Gambogic acid is a naturally occurring xanthonoid extracted from the resin of trees belonging to the Garcinia genus—most notably, Garcinia hanburyi. This tree is native to regions in Southeast Asia, particularly found in areas of China, India, and neighboring countries.
Gambogic acid (GA; C38H44O8, MW: 628.76), a polyprenylated xanthone and a widely used coloring agent, is the main active ingredient of gamboges secreted from the Garcinia hanburyi tree ([3, 4], which mainly grows in Southeast Asia.
GA has been approved by the Chinese FDA for the treatment of solid cancers in Phase II clinical trials.

Pathways:
-evidence suggesting that it can inhibit thioredoxin reductase (TrxR).
-can indeed lead to an increase in reactive oxygen species (ROS) levels
-Gambogic acid can trigger mitochondrial dysfunction, leading to cytochrome c release
-influences death receptors
-Inhibition of NF-κB Signaling
-Inhibition of VEGF Pathway
-Cell Cycle Arrest:
-p53 Activation
Rank Pathway / Target Axis Direction Primary Effect Notes / Cancer Relevance Ref
1 Thioredoxin / Thioredoxin reductase (Trx / TrxR) ↓ Trx / TrxR activity Redox buffering collapse Primary molecular target; covalent cysteine interaction drives loss of antioxidant capacity (ref)
2 ROS accumulation ↑ ROS Oxidative stress overload Immediate consequence of Trx/TrxR inhibition; upstream of mitochondrial damage (ref)
3 Mitochondrial integrity (ΔΨm) ↓ ΔΨm Mitochondrial dysfunction GA reduces mitochondrial membrane potential prior to execution-phase death (ref)
4 Intrinsic apoptosis / pyroptosis (caspase-3, GSDME) ↑ programmed cell death Execution-phase killing Mitochondrial apoptosis and caspase-3/GSDME-dependent pyroptosis reported (ref)
5 NF-κB signaling ↓ NF-κB activation Reduced pro-survival transcription Redox-sensitive suppression of NF-κB nuclear activity and target genes (ref)
6 PI3K–AKT survival signaling ↓ AKT phosphorylation Survival pathway collapse Downstream of oxidative stress and chaperone disruption (ref)
7 HSP90 chaperone function ↓ client stabilization Oncoprotein destabilization GA disrupts HSP90–client interactions affecting AKT, HER2, etc. (ref)
8 ER stress / UPR ↑ ER stress signaling Proteotoxic stress Secondary ER stress response following redox and mitochondrial disruption (ref)
9 Cell cycle regulation ↑ cell-cycle arrest Proliferation blockade Checkpoint activation downstream of stress signaling (ref)
10 Autophagy (stress-induced) ↑ autophagy Adaptive or pro-death response Autophagy induction reported; role varies by context (ref)
11 Angiogenesis signaling (VEGF) ↓ VEGF expression Anti-angiogenic effect Suppression of pro-angiogenic transcription observed (ref)
12 Tumor growth in vivo ↓ tumor volume Integrated outcome Xenograft models show significant tumor growth inhibition (ref)


ER Stress, endoplasmic reticulum (ER) stress signaling pathway: Click to Expand ⟱
Source:
Type:
Protein expression of ATF, GRP78, and GADD153 which is a hall marker of ER stress.
The endoplasmic reticulum (ER) stress signaling pathway plays a crucial role in maintaining cellular homeostasis and responding to various stressors, including those encountered in cancer. When cells experience stress, such as the accumulation of misfolded proteins, they activate a series of signaling pathways collectively known as the unfolded protein response (UPR). The UPR aims to restore normal function by enhancing the protein-folding capacity of the ER, degrading misfolded proteins, and, if the stress is unresolved, triggering apoptosis.
The activation of ER stress pathways can contribute to resistance against chemotherapy and targeted therapies. Cancer cells may utilize the UPR to survive treatment-induced stress, making it challenging to achieve effective therapeutic outcomes.

-ER stress-associated proteins include: phosphorylation of PERK, eIF2α, ATF4, CHOP and cleaved-caspase 12
Scientific Papers found: Click to Expand⟱
1968- GamB,    Gambogic Acid Shows Anti-Proliferative Effects on Non-Small Cell Lung Cancer (NSCLC) Cells by Activating Reactive Oxygen Species (ROS)-Induced Endoplasmic Reticulum (ER) Stress-Mediated Apoptosis
- in-vitro, Lung, A549
tumCV↓, ROS↑, GRP78/BiP↑, CHOP↑, ATF6↑, Casp12↑, p‑PERK↑, ER Stress↑,
2060- GamB,    Gambogenic acid induces apoptosis and autophagy through ROS-mediated endoplasmic reticulum stress via JNK pathway in prostate cancer cells
- in-vitro, Pca, NA
TumCP↓, TumAuto↑, eff↑, ROS↑, ER Stress↑, JNK↑,
1971- GamB,    Gambogic acid triggers vacuolization-associated cell death in cancer cells via disruption of thiol proteostasis
- in-vitro, Nor, MCF10 - in-vitro, BC, MDA-MB-435 - in-vitro, BC, MDA-MB-468 - in-vivo, NA, NA
Paraptosis↑, ER Stress↑, MMP↓, eff↓, selectivity↑, p‑ERK↑, p‑JNK↑, eff↓,
1960- GamB,  Vem,    Calcium channel blocker verapamil accelerates gambogic acid-induced cytotoxicity via enhancing proteasome inhibition and ROS generation
- in-vitro, Liver, HepG2 - in-vitro, AML, K562
Proteasome↓, eff↑, Casp↑, ER Stress↑, ROS↑, eff↑,
1958- GamB,    Gambogenic acid induces apoptosis and autophagy through ROS-mediated endoplasmic reticulum stress via JNK pathway in prostate cancer cells
- in-vitro, Pca, NA - in-vivo, NA, NA
AntiCan↑, TumCP↓, TumAuto↑, eff↑, JNK↑, ROS↑, ER Stress↑, eff↓, TumCG↓,

Showing Research Papers: 1 to 5 of 5

* indicates research on normal cells as opposed to diseased cells
Total Research Paper Matches: 5

Pathway results for Effect on Cancer / Diseased Cells:


Redox & Oxidative Stress ⓘ

ROS↑, 4,  

Mitochondria & Bioenergetics ⓘ

MMP↓, 1,  

Cell Death ⓘ

Casp↑, 1,   Casp12↑, 1,   JNK↑, 2,   p‑JNK↑, 1,   Paraptosis↑, 1,   Proteasome↓, 1,  

Transcription & Epigenetics ⓘ

tumCV↓, 1,  

Protein Folding & ER Stress ⓘ

ATF6↑, 1,   CHOP↑, 1,   ER Stress↑, 5,   GRP78/BiP↑, 1,   p‑PERK↑, 1,  

Autophagy & Lysosomes ⓘ

TumAuto↑, 2,  

Proliferation, Differentiation & Cell State ⓘ

p‑ERK↑, 1,   TumCG↓, 1,  

Migration ⓘ

TumCP↓, 2,  

Drug Metabolism & Resistance ⓘ

eff↓, 3,   eff↑, 4,   selectivity↑, 1,  

Functional Outcomes ⓘ

AntiCan↑, 1,  
Total Targets: 22

Pathway results for Effect on Normal Cells:


Total Targets: 0

Scientific Paper Hit Count for: ER Stress, endoplasmic reticulum (ER) stress signaling pathway
5 Gambogic Acid
1 verapamil
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#:302  Target#:103  State#:%  Dir#:2
  wNotes=0  sortOrder:rid,rpid

 

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