Database Query Results : Gambogic Acid, , TrxR

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)


TrxR, Thioredoxin Reductase: Click to Expand ⟱
Source:
Type:
TrxR is an enzyme that reduces Trx, allowing it to perform its reducing functions. It has been shown to have a role in cancer cell metabolism and survival.
TrxR is overexpressed in various types of cancer, including breast, lung, colon, and prostate cancer.

- Part of the thioredoxin system, which regulates reactive oxygen species (ROS).
- TrxR is a major antioxidant systems that maintains the intracellular redox homeostasis.
- Inhibition causes an increase in ROS.
- TrxR is often upregulated in cancer cells to help manage increased oxidative stress, it is seen as a potential therapeutic target. Inhibiting TrxR may result in increased ROS in cancer cells, pushing them toward apoptosis.
- TrxR is a selenoprotein—meaning it incorporates the trace element selenium in the form of the amino acid selenocysteine.

TrxR inhibitors:
-Piperlongumine
-Withania somnifera (Ashwagandha)
-Parthenolide
-EGCG
-Curcumin
-Myricetin
-Gambogic Acid
Scientific Papers found: Click to Expand⟱
5148- GamB,    Gambogic acid: A shining natural compound to nanomedicine for cancer therapeutics
- Review, Var, NA
AntiCan↑, In this review, we document distinct biological characteristics of GA as a novel anti-cancer agent.
angioG↓, anti-angiogenesis, and chemo-/radiation sensitizer activities
ChemoSen↑, Moreover, GA has shown chemotherapy/radiation sensitization properties in different types of cancers
RadioS↑,
VEGF↓, Figure 2
MMP2↓,
MMP9↓,
Telomerase↓,
TrxR↓,
ERK↓,
HSP90↓,
ROS↑,
SIRT1↑,
survivin↓,
cFLIP↓,
Casp3↑,
Casp8↑,
Casp9↑,
BAD↓,
BID↓,
Bcl-2↓,
BAX↑,
STAT3↓,
hTERT/TERT↓,
NF-kB↓,
Myc↓,
Hif1a↓,
FOXD3↑,
BioAv↓, Unfortunately, the aqueous solubility of GA (0.013 mg/mL) is very low, thus limiting its clinical application.
BioAv↑, For example, GA can be coupled with alkanolamines to improve aqueous solubility and achieve equivalent anti-proliferation effects
P53↑, This inhibition was co-related with increase of p53 levels and reduced bcl-2 levels
eff↓, Such effect was received for GA due to production of ROS which can be removed by N-acetyl-L-cysteine (NAC, a ROS inhibitor)
OCR↓, GA exhibited a dose-dependent generation of intracellular ROS levels and lowered the oxygen consumption rate and the mitochondrial membrane potential.
MMP↓,
PI3K↓, GA happens to promote antimetastasis properties in melanoma cells by active inhibition of PI3K/Akt and ERK signaling pathways
Akt↓,
BBB↑, This study demonstrated successful uptake of GA through blood-brain barrier (BBB)
TumCG↓, GA-based nanomedicine is efficient in targeting tumors, capable to inhibit tumor growth, metastasis, angiogenesis, and reverse drug resistance
TumMeta↓,
BioAv↑, deliver GA using nanoparticles for enhanced solubility, bioavailability, adsorption and tumor imaging and targeting

1954- GamB,    Gambogic acid induces apoptosis in hepatocellular carcinoma SMMC-7721 cells by targeting cytosolic thioredoxin reductase
- in-vitro, HCC, SMMC-7721 cell
AntiTum↑, Gambogic acid (GA), a natural product that has been used in traditional Chinese medicine for centuries, demonstrates potent anticancer activity in numerous types of human cancer cells and has entered phase II clinical trials
TrxR↓, GA may interact with TrxR1 to elicit oxidative stress
TrxR1↓,
ROS↑,
Apoptosis↑, eventually induce apoptosis in human hepatocellular carcinoma SMMC-7721 cells.
Dose∅, GA effectively inhibited TrxR1 with an IC 50 around 1.2 uM,
Dose?, Under our experimental conditions, GA with concentration less than 5 uM gives only marginal inhibition of Trx

1955- GamB,    Gambogic acid inhibits thioredoxin activity and induces ROS-mediated cell death in castration-resistant prostate cancer
- in-vitro, Pca, PC3 - in-vitro, Pca, LNCaP - in-vitro, Pca, DU145
ROS↑, GA disrupted cellular redox homeostasis, observed as elevated reactive oxygen species (ROS), leading to apoptotic and ferroptotic death.
Apoptosis↑,
Ferroptosis↑,
Trx↓, GA inhibited thioredoxin
eff↑, Auranofin (AUR), a thioredoxin reductase (TrxR) inhibitor was the one compound that demonstrated additive growth inhibition together with GA when both were combined at sub-thresh hold concentrations
TrxR↓, GA may inhibit the thioredoxin (Trx) system, which mainly composes NADPH, TrxR, and Trx.
Dose∅, GA demonstrated sub-micromolar activity (IC50 = 185nM) which was 50 times more potent than the next most active compounds, curcumin and tanshinone (CT)
MMP↓, GA treatment showed increasing loss of membrane polarity at 4 and 6 hours in PCAP-1 cells
eff↑, GA enhanced the cell killing observed for either docetaxel (DOX) or enzalutamide (ENZA)
Casp↑, These results suggest that GA initiates CASP-dependent death of PCAP-1 cells and that both iron-dependent oxidative injury and direct CASP activation contribute
NADPH↓, These results suggest that GA may inhibit the thioredoxin (Trx) system, which mainly composes NADPH, TrxR, and Trx.
TrxR↓,
ChemoSen↑, potential use of GA in combination with standard chemotherapeutic (docetaxel) and anti-androgen endocrine (enzalutamide) therapies for advanced PrCa.
AR↓, inhibit PrCa growth, in part by inhibiting AR signaling


* indicates research on normal cells as opposed to diseased cells
Total Research Paper Matches: 3

Pathway results for Effect on Cancer / Diseased Cells:


Redox & Oxidative Stress ⓘ

Ferroptosis↑, 1,   ROS↑, 3,   Trx↓, 1,   TrxR↓, 4,   TrxR1↓, 1,  

Mitochondria & Bioenergetics ⓘ

MMP↓, 2,   OCR↓, 1,  

Core Metabolism/Glycolysis ⓘ

NADPH↓, 1,   SIRT1↑, 1,  

Cell Death ⓘ

Akt↓, 1,   Apoptosis↑, 2,   BAD↓, 1,   BAX↑, 1,   Bcl-2↓, 1,   BID↓, 1,   Casp↑, 1,   Casp3↑, 1,   Casp8↑, 1,   Casp9↑, 1,   cFLIP↓, 1,   Ferroptosis↑, 1,   hTERT/TERT↓, 1,   Myc↓, 1,   survivin↓, 1,   Telomerase↓, 1,  

Kinase & Signal Transduction ⓘ

FOXD3↑, 1,  

Protein Folding & ER Stress ⓘ

HSP90↓, 1,  

DNA Damage & Repair ⓘ

P53↑, 1,  

Proliferation, Differentiation & Cell State ⓘ

ERK↓, 1,   PI3K↓, 1,   STAT3↓, 1,   TumCG↓, 1,  

Migration ⓘ

MMP2↓, 1,   MMP9↓, 1,   TumMeta↓, 1,  

Angiogenesis & Vasculature ⓘ

angioG↓, 1,   Hif1a↓, 1,   VEGF↓, 1,  

Barriers & Transport ⓘ

BBB↑, 1,  

Immune & Inflammatory Signaling ⓘ

NF-kB↓, 1,  

Hormonal & Nuclear Receptors ⓘ

AR↓, 1,  

Drug Metabolism & Resistance ⓘ

BioAv↓, 1,   BioAv↑, 2,   ChemoSen↑, 2,   Dose?, 1,   Dose∅, 2,   eff↓, 1,   eff↑, 2,   RadioS↑, 1,  

Clinical Biomarkers ⓘ

AR↓, 1,   hTERT/TERT↓, 1,   Myc↓, 1,  

Functional Outcomes ⓘ

AntiCan↑, 1,   AntiTum↑, 1,  
Total Targets: 54

Pathway results for Effect on Normal Cells:


Total Targets: 0

Scientific Paper Hit Count for: TrxR, Thioredoxin Reductase
3 Gambogic 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

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