Quercetin / hepatoP Cancer Research Results

QC, Quercetin: Click to Expand ⟱
Features:
Plant pigment (flavonoid) found in red wine, onions, green tea, apples and berries.
Quercetin is thought to contribute to anticancer effects through several mechanisms:
-Antioxidant Activity:
-Induction of Apoptosis:modify Bax:Bcl-2 ratio
-Anti-inflammatory Effects:
-Cell Cycle Arrest:
-Inhibition of Angiogenesis and Metastasis: (VEGF)

Cellular Pathways:
-PI3K/Akt/mTOR Pathway: central to cell proliferation, survival, and metabolism.
-MAPK/ERK Pathway: influencing cell proliferation, differentiation, and apoptosis.
-NF-κB Pathway: downregulate NF-κB
-JAK/STAT Pathway: interfere with the activation of STAT3
-Apoptotic Pathways: intrinsic (mitochondrial) and extrinsic (death receptor-mediated) pathways

Quercetin has been used at doses around 500–1000 mg per day
Quercetin’s bioavailability from foods or standard supplements can be low.
EMIQ bioavialability is about 3X that of Quercetin (Example Natural Factors brand)
Isoquercitrin is high bioaviability and efficiacy but at this time does not seem available as supplement.

-Note half-life 11 to 28 hours.
BioAv low 1-10%, poor water-solubility, consuming with fat may improve bioavialability. also piperine or VitC.
Pathways:
- induce ROS production in cancer cells (higher dose). Typicallys Lowers ROS in normal cells(unless it is high dose?)or depends on Redox status?. "quercetin paradox"
- ROS↑ related: MMP↓(ΔΨm), ER Stress↑, UPR↑, GRP78↑, Ca+2↑, Cyt‑c↑, Caspases↑, DNA damage↑, cl-PARP↑, HSP↓, Prx,
- Confusing info about Lowering AntiOxidant defense in Cancer Cells: NRF2↓(some contrary), TrxR↓**, SOD↓(contrary), GSH↓ Catalase↓(contrary), HO1↓(some contrary), GPx↓(some contrary)
- Raises AntiOxidant defense in Normal Cells: ROS↓, NRF2↑, SOD↑, GSH↑, Catalase↑,
- lowers Inflammation : NF-kB↓, COX2↓, p38↓, Pro-Inflammatory Cytokines : NLRP3↓, IL-1β↓, TNF-α↓, IL-6↓, IL-8↓
- inhibit Growth/Metastases : TumMeta↓, TumCG↓, EMT↓, MMPs↓, MMP2↓, MMP9↓, TIMP2, IGF-1↓, uPA↓, VEGF↓, ROCK1↓, FAK↓, NF-κB↓, CXCR4↓, SDF1↓, TGF-β↓, α-SMA↓, ERK↓
- reactivate genes thereby inhibiting cancer cell growth : HDAC↓, DNMTs↓, EZH2↓, P53↑, HSP↓, Sp proteins↓, TET↑
- cause Cell cycle arrest : TumCCA↑, cyclin D1↓, cyclin E↓, CDK2↓, CDK4↓, CDK6↓,
- inhibits Migration/Invasion : TumCMig↓, TumCI↓, TNF-α↓, FAK↓, ERK↓, EMT↓, TOP1↓, TET1,
- inhibits glycolysis and ATP depletion : HIF-1α↓, PKM2↓, cMyc↓, GLUT1↓, LDH↓, LDHA↓, HK2↓, PFKs↓, PDKs↓, ECAR↓, OXPHOS↓, GRP78↑, GlucoseCon↓
- inhibits angiogenesis↓ : VEGF↓, HIF-1α↓, Notch↓, FGF↓, PDGF↓, EGFR↓,
- some indication of inhibiting Cancer Stem Cells : CSC↓, CK2↓, Hh↓, CD24↓, β-catenin↓, Notch2↓,
- Others: PI3K↓, AKT↓, JAK↓, STAT↓, Wnt↓, β-catenin↓, AMPK, α↓, ERK↓, JNK, - SREBP (related to cholesterol).
- Synergies: chemo-sensitization, chemoProtective, RadioSensitizer, RadioProtective, Others(review target notes), Neuroprotective, Cognitive, Renoprotection, Hepatoprotective, CardioProtective,

- Selectivity: Cancer Cells vs Normal Cells

Rank Pathway / Axis Cancer Cells Normal Cells Label Primary Interpretation Notes
1 Reactive oxygen species (ROS) ↑ ROS (dose-, metal-, context-dependent) ↓ ROS Conditional Driver Biphasic redox modulation Quercetin exhibits pro-oxidant behavior in cancer cells while protecting normal cells
2 Mitochondrial integrity / intrinsic apoptosis ↓ ΔΨm; ↑ caspase activation ↔ preserved Driver Execution of intrinsic apoptosis Mitochondrial dysfunction is a central apoptosis route in cancer cells
3 PI3K → AKT → mTOR axis ↓ AKT / ↓ mTOR ↔ adaptive suppression Driver Growth and survival inhibition AKT/mTOR suppression is a consistently reported upstream effect in cancer models
4 NF-κB signaling ↓ NF-κB activation ↓ inflammatory NF-κB tone Secondary Reduced survival and inflammatory transcription NF-κB inhibition contributes to chemosensitization and apoptosis susceptibility
5 MAPK signaling (JNK / p38) ↑ JNK / ↑ p38 ↔ minimal Secondary Stress-mediated apoptosis signaling MAPK activation supports apoptosis downstream of redox stress
6 Cell cycle regulation ↑ G1/S or G2/M arrest ↔ largely spared Phenotypic Cytostatic growth control Cell-cycle arrest reflects disruption of growth signaling
7 HIF-1α hypoxia signaling ↓ HIF-1α ↔ minimal Secondary Reduced hypoxia tolerance Quercetin interferes with hypoxia-driven transcriptional programs
8 NRF2 antioxidant response ↑ NRF2 (adaptive, context-dependent) ↑ NRF2 (protective) Adaptive Stress compensation NRF2 induction reflects redox buffering rather than primary cytotoxicity


hepatoP, L,hepatoprotective: Click to Expand ⟱
Source:
Type:
Hepatoprotective is the ability of a chemical substance to prevent damage to the liver.

Grapefruit:
-hepatoprotective potential has emerged from the study of naringenin and naringin.
Blueberries/cranberries:
-proanthocyanidins
Grape:
Nopal (Cactus pear) and tuna (Cactus pear fruit) “Opuntia ficus-indica”:
Chamomile (Matricaria chamomilla or Chamomilla recutita):
Silymarin (Silybum marianum):
Blue green algae spirulina :
Propolis (bee glue):

POLYSACCHARIDES
β-glucans
Scientific Papers found: Click to Expand⟱
2344- QC,    Quercetin: A natural solution with the potential to combat liver fibrosis
- Review, Nor, NA
*HK2↓, By reducing the activity of key glycolytic enzymes—including hexokinase II (HK2), phosphofructokinase platelet (PFKP), and pyruvate kinase M2 (PKM2)—quercetin lowers energy production in LSECs, potentially slowing fibrosis progression.
*PFKP↓,
*PKM2↓,
*hepatoP↑, Quercetin lowered levels of liver enzymes (ALT, AST) and total bile acid, markers of liver injury.
*ALAT↓,
*AST↓,
*Glycolysis↓, quercetin inhibited glycolysis in LSECs, reducing lactate production, glucose consumption, and the expression of glycolytic enzymes
*lactateProd↓,
*GlucoseCon↓,
*CXCL1↓, By suppressing CXCL1 secretion, quercetin decreased neutrophil infiltration, a key factor in liver fibrosis, thereby effecting inflammation control.
*Inflam↓,

2303- QC,  doxoR,    Quercetin greatly improved therapeutic index of doxorubicin against 4T1 breast cancer by its opposing effects on HIF-1α in tumor and normal cells
- in-vitro, BC, 4T1 - in-vivo, NA, NA
cardioP↑, Quercetin had better cardioprotective and hepatoprotective activities.
hepatoP↑,
TumCG↓, In vivo, quercetin suppressed tumor growth and prolonged survival in BALB/c mice bearing 4T1 breast cancer.
OS↑,
ChemoSen↑, quercetin enhanced therapeutic efficacy of DOX and simultaneously reduced DOX-induced toxic side effects
chemoP↑, IC50 of DOX in combination with quercetin 10 or 25 uM was increased by three- and fourfold, respectively, compared with that of DOX alone
Hif1a↓, Further study showed that quercetin suppressed intratumoral HIF-1α in a hypoxia-dependent way but increased its accumulation in normal cells
*Hif1a↑,
selectivity↑, quercetin could improve therapeutic index of DOX by its opposing effects on HIF-1α in tumor and normal cells
TumVol↓,
OS↑,

3348- QC,    Quercetin and iron metabolism: What we know and what we need to know
- Review, NA, NA
*IronCh↑, Quercetin alleviates iron overload induced by various pathologies as a natural iron chelator.
*ROS↓, Quercetin's iron-chelating property and direct scavenging action against ROS (reactive oxygen species) are believed to be the essence of its antioxidant activity.
*AntiAg↑,
*Fenton↓, Cheng and Breen (Cheng and Breen, 2000) found that quercetin suppressed the Fenton reaction by forming a Fe-quercetin-ATP complex.
*lipid-P↓, quercetin effectively decreases iron deposition, and it alleviates lipid peroxidation as well as protein oxidation in the livers, kidneys and hearts of iron-dextran-overloaded mice.
*hepatoP↑, quercetin acts as a reliable liver protector to prevent iron-provoked oxidative damage
*RenoP↑, modulation of iron by quercetin has been shown to prevent glycerol-induced acute myoglobinuric renal failure
HIF-1↑, in both human prostate adenocarcinoma cell lines (LNCaP, DU-145, and PC-3 cell lines) and HeLa cells, quercetin treatment appears to induce HIF-1/2αaccumulation, which may give rise to some undesirable consequences in cases such as cancer treatment
ROS↑, The redox status of quercetin determines whether it can undergo oxido-reductive activation and then be subjected to the iron-involved redox cycling of the Fenton reaction to produce substantial amounts of ROS.

3341- QC,    Antioxidant Activities of Quercetin and Its Complexes for Medicinal Application
- Review, Var, NA - Review, Stroke, NA
*antiOx↑, we highlight the recent advances in the antioxidant activities, chemical research, and medicinal application of quercetin.
*BioAv↑, Moreover, owing to its high solubility and bioavailability,
*GSH↑, Animal and cell studies found that quercetin induces GSH synthesis
*AChE↓, In this way, it has a stronger inhibitory effect against key enzymes acetylcholinesterase (AChE) and butyrylcholinesterase (BChE), which are associated with oxidative properties
*BChE↓,
*H2O2↓, Quercetin has been shown to alleviate the decline of manganese-induced antioxidant enzyme activity, the increase of AChE activity, hydrogen peroxide generation, and lipid peroxidation levels in rats, thereby preventing manganese poisoning
*lipid-P↓,
*SOD↑, quercetin significantly enhanced the expression levels of endogenous antioxidant enzymes such as Cu/Zn SOD, Mn SOD, catalase (CAT), and GSH peroxidase in the hippocampal CA1 pyramidal neurons of animals suffering from ischemic injury.
*SOD2↑,
*Catalase↑,
*GPx↑,
*neuroP↑, Thus, quercetin may be a potential neuroprotective agent for transient ischemia
*HO-1↑, quercetin can promote fracture healing in smokers by removing free radicals and upregulating the expression of heme-oxygenase- (HO-) 1 and superoxide-dismutase- (SOD-) 1, which protects primary human osteoblasts exposed to cigarette smoke
*cardioP↑, Quercetin has also been shown to prevent heart damage by clearing oxygen-free radicals caused by lipopolysaccharide (LPS)-induced endotoxemia.
*MDA↓, quercetin treatment increased the levels of SOD and CAT and reduced the level of MDA after LPS induction, suggesting that quercetin enhanced the antioxidant defense system
*NF-kB↓, quercetin promotes disease recovery by downregulating the expression of NIK and NF-κB including IKK and RelB, and upregulating the expression of TRAF3.
*IKKα↓,
*ROS↓, quercetin controls the development of atherosclerosis induced by a high-fructose diet by inhibiting ROS and enhancing PI3K/AKT.
*PI3K↑,
*Akt↑,
*hepatoP↑, Quercetin exerts antioxidant and hepatoprotective effects against acute liver injury in mice induced by tertiary butyl hydrogen peroxide. T
P53↑, Quercetin prevents cancer development by upregulating p53, which is the most common inactivated tumor suppressor. It also increases the expression of BAX, a downstream target of p53 and a key pro-apoptotic gene in HepG2 cells
BAX↑,
IGF-1R↓, Studies have found that insulin-like growth factor receptor 1 (IGFIR), AKT, androgen receptor (AR), and cell proliferation and anti-apoptotic proteins are increased in cancer, but quercetin supplementation normalizes their expression
Akt↓,
AR↓,
TumCP↓,
GSH↑, Moreover, quercetin significantly increases antioxidant enzyme levels, including GSH, SOD, and CAT, and inhibits lipid peroxides, thereby preventing skin cancer induced by 7,12-dimethyl Benz
SOD↑,
Catalase↑,
lipid-P↓,
*TNF-α↓, Heart: increases TNF-α, and prevents Ca2+ overload-induced myocardial cell injury
*Ca+2↓,


Showing Research Papers: 1 to 4 of 4

* indicates research on normal cells as opposed to diseased cells
Total Research Paper Matches: 4

Pathway results for Effect on Cancer / Diseased Cells:


Redox & Oxidative Stress(tgid=1) ⓘ

Catalase↑, 1,   GSH↑, 1,   lipid-P↓, 1,   ROS↑, 1,   SOD↑, 1,  

Cell Death(tgid=5) ⓘ

Akt↓, 1,   BAX↑, 1,  

DNA Damage & Repair(tgid=10) ⓘ

P53↑, 1,  

Proliferation, Differentiation & Cell State(tgid=12) ⓘ

IGF-1R↓, 1,   TumCG↓, 1,  

Migration(tgid=13) ⓘ

TumCP↓, 1,  

Angiogenesis & Vasculature(tgid=14) ⓘ

HIF-1↑, 1,   Hif1a↓, 1,  

Hormonal & Nuclear Receptors(tgid=20) ⓘ

AR↓, 1,  

Drug Metabolism & Resistance(tgid=21) ⓘ

ChemoSen↑, 1,   selectivity↑, 1,  

Clinical Biomarkers(tgid=22) ⓘ

AR↓, 1,  

Functional Outcomes(tgid=23) ⓘ

cardioP↑, 1,   chemoP↑, 1,   hepatoP↑, 1,   OS↑, 2,   TumVol↓, 1,  
Total Targets: 22

Pathway results for Effect on Normal Cells:


Redox & Oxidative Stress(tgid=1) ⓘ

antiOx↑, 1,   Catalase↑, 1,   Fenton↓, 1,   GPx↑, 1,   GSH↑, 1,   H2O2↓, 1,   HO-1↑, 1,   lipid-P↓, 2,   MDA↓, 1,   ROS↓, 2,   SOD↑, 1,   SOD2↑, 1,  

Metal & Cofactor Biology(tgid=2) ⓘ

IronCh↑, 1,  

Core Metabolism/Glycolysis(tgid=4) ⓘ

ALAT↓, 1,   GlucoseCon↓, 1,   Glycolysis↓, 1,   HK2↓, 1,   lactateProd↓, 1,   PFKP↓, 1,   PKM2↓, 1,  

Cell Death(tgid=5) ⓘ

Akt↑, 1,  

Proliferation, Differentiation & Cell State(tgid=12) ⓘ

PI3K↑, 1,  

Migration(tgid=13) ⓘ

AntiAg↑, 1,   Ca+2↓, 1,  

Angiogenesis & Vasculature(tgid=14) ⓘ

Hif1a↑, 1,  

Immune & Inflammatory Signaling(tgid=16) ⓘ

CXCL1↓, 1,   IKKα↓, 1,   Inflam↓, 1,   NF-kB↓, 1,   TNF-α↓, 1,  

Synaptic & Neurotransmission(tgid=18) ⓘ

AChE↓, 1,   BChE↓, 1,  

Drug Metabolism & Resistance(tgid=21) ⓘ

BioAv↑, 1,  

Clinical Biomarkers(tgid=22) ⓘ

ALAT↓, 1,   AST↓, 1,  

Functional Outcomes(tgid=23) ⓘ

cardioP↑, 1,   hepatoP↑, 3,   neuroP↑, 1,   RenoP↑, 1,  
Total Targets: 39

Scientific Paper Hit Count for: hepatoP, L,hepatoprotective
4 Quercetin
1 doxorubicin
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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