Quercetin / cardioP 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

cardioP, cardioProtective: Click to Expand ⟱

Source:

Type:

CardioProtective

Scientific Papers found: Click to Expand⟱

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

100uM

51.42 uM

in-vivo,

NA,

quercetin 100 mg/kg day or DOX 5 mg/kg

mice

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↑,

98-

QC,

Quercetin postconditioning attenuates myocardial ischemia/reperfusion injury in rats through the PI3K/Akt pathway

in-vivo,

Stroke,

 rats

*Bcl-2↑,
*BAX↓,
*Bax:Bcl2↓, Que postconditioning significantly decreased Bax expression and increased Bcl-2 expression
*cardioP↑, cardioprotection by activating the PI3K/Akt signaling pathway and modulating the expression of Bcl-2 and Bax proteins.
*Akt↑,
*PI3K↑,
*LDH↓, Que postconditioning reduced the levels of CK (1642.9±194.3 vs 2679.5±194.3 U/L, P<0.05) and LDH (1273.6±176.5 vs 2618±197.7 U/L, P<0.05) compared to the I/R group

3601-

QC,

Overviews of Biological Importance of Quercetin: A Bioactive Flavonoid

Review,

Var,

Review,

AD,

*Inflam↓, known for its anti-inflammatory, antihypertensive, vasodilator effects, antiobesity, antihypercholesterolemic and antiatherosclerotic activities
*cardioP↑, beneficial effects include cardiovascular protection, anticancer, antitumor, anti-ulcer, anti-allergy, anti-viral, anti-inflammatory activity, anti-diabetic, gastroprotective effects, antihypertensive, immunomodulatory, and anti-infective.
AntiCan↑,
AntiTum↑,
*neuroP↑, The consumption of flavonoids rich food limits neurodegeneration and to reverse age-dependent loss in cognitive performance.
*cognitive↑,
*ROS↓, It is known to protect brain cells against the oxidative stress, which damages tissue leading to Alzheimer and other neurological conditions
*BP↓, Quercetin supplementation (150 mg/day) reduced systolic blood pressure and plasma oxidized LDL concentrations in overweight subjects
*LDL↓,

3534-

QC,

Lyco,

Synergistic protection of quercetin and lycopene against oxidative stress via SIRT1-Nox4-ROS axis in HUVEC cells

in-vitro,

Nor,

HUVECs

*ROS↓, especially quercetin-lycopene combination (molar ratio 5:1), prevented the oxidative stress in HUVEC cells by reducing the reactive oxygen species (ROS) and suppressing the expression of NADPH oxidase 4 (Nox4), a major source of ROS production.
*NOX4↓, Quercetin-lycopene combination could interact with SIRT1 to inhibit Nox4 and prevent endothelial oxidative stress
*Inflam↓, quercetin-lycopene combination downregulated inflammatory genes induced by H2O2, such as IL-17 and NF-κB.
*NF-kB↓, NF-κB p65 was activated by H2O2 but inhibited by the quercetin-lycopene combination.
*p65↓,
*SIRT1↑, quercetin and lycopene combination promoted the thermostability of Sirtuin 1 (SIRT1) and activated SIRT1 deacetyl activity
*cardioP↑, The cardioprotective role of SIRT1
*IL6↓, LYP: Q = 1:5), interacted with deacetylase SIRT1 to inhibit NF-κB p65 and Nox4 enzyme, downregulated inflammatory cytokines such as IL-6 and pro-inflammatory enzymes such as COX-2, and suppressed ROS elevation activated by H2O2.
*COX2/PTGS2↓,

5025-

QC,

New perspectives on the therapeutic potential of quercetin in non-communicable diseases: Targeting Nrf2 to counteract oxidative stress and inflammation

Review,

Nor,

*antiOx↑, Quercetin (Que) is a widely available flavonoid that has significant antioxidant and anti-inflammatory properties. It modulates the Nrf2 signaling pathway to ameliorate oxidative stress and inflammation.
*Inflam↓,
*NRF2↓,
*ROS↓, Que modulates mitochondrial function, apoptosis, autophagy, and cell damage biomarkers to regulate oxidative stress and inflammation, highlighting its efficacy as a therapeutic agent against NCDs.
*cardioP↑, Nrf2 promotes the proliferation and repair of vascular smooth muscle cells, effectively restoring the optimal structure and function of blood vessels to improve cardiovascular health.
*HO-1↑, Que interacts with antioxidant enzymes such as HO-1, CAT, and glutathione peroxidase (GSH-PX), and enhances their free radical scavenging activity
*Catalase↑,
*GPx↑,
*NQO1↑, This process upregulates the expressions of key antioxidant and detoxification genes, such as HO-1 and NQO1, thereby inhibiting excessive intracellular ROS production.
*SIRT1↑, Que mediated by the activation of the Sirt1/Nrf2/HO-1 pathway,

3354-

QC,

Quercetin: Its Main Pharmacological Activity and Potential Application in Clinical Medicine

Review,

Var,

*ROS↓, quercetin is the most effective free radical scavenger in the flavonoid family
*IronCh↓, Chelating metal ions: related studies have confirmed that quercetin can induce Cu2+ and Fe2+ to play an antioxidant role through catechol in its structure.
*lipid-P↓, quercetin could inhibit Fe2+-induced lipid peroxidation by binding Fe2+ a
*GSH↑, regulation of glutathione levels to enhance antioxidant capacity.
*NRF2↑, quercetin upregulates the expression of Nrf2 and nuclear transfer by activating the intracellular p38 MAPK pathway, increasing the level of intracellular GSH
TumCCA↑, human leukaemia U937 cells, quercetin induces cell cycle arrest at G2 (late DNA synthesis phase)
ER Stress↑, quercetin can induce ER stress and promote the release of p53, thereby inhibiting the activities of CDK2, cyclin A, and cyclin B, thereby causing MCF-7 breast cancer cells to stagnate in the S phase.
P53↑,
CDK2↓,
cycA1/CCNA1↓,
CycB/CCNB1↓,
cycE/CCNE↓, downregulation of cyclins E and D, PNCA, and Cdk-2 protein expression and increased expressions of p21 and p27
cycD1/CCND1↓,
PCNA↓,
P21↑,
p27/CDKN1B↑,
PI3K↓, quercetin inhibited the PI3K/AKT/mTOR and STAT3 pathways in PEL, which downregulated the expression of survival cell proteins such as c-FLIP, cyclin D1, and cMyc.
Akt↓,
mTOR↓,
STAT3↓, in excess of 20 μM by inhibiting STAT3 signalling
cFLIP↓,
cMyc↓,
survivin↓, Lung cancer [27] ↓ Survivin ↑DR5
DR5↓,
*Inflam↓, Quercetin has been confirmed to be a long-acting anti-inflammatory substance in flavonoids
*IL6↓, inhibit IL-8 is stronger and can inhibit IL-6 and increase cytosolic calcium levels
*IL8↓,
COX2/PTGS2↓, inhibit the enzymes that produce inflammation (cyclooxygenase (COX) and lipoxygenase (LOX))
5LO↓,
*cardioP↑, The protective mechanism of quercetin on the cardiovascular system
*FASN↓, 25 μM, within 30 minutes could inhibit the synthesis of fatty acids.
*AntiAg↑, quercetin helps reduce lipid peroxidation, platelet aggregation, and capillary permeability
*MDA↓, quercetin can decrease the levels of malondialdehyde (MDA)

3353-

QC,

Quercetin triggers cell apoptosis-associated ROS-mediated cell death and induces S and G2/M-phase cell cycle arrest in KON oral cancer cells

in-vitro,

Oral,

KON

 0, 1.5625, 3.125, 6.25, 12.5, 25, 50, 100, and 400 µg/mL

50ug/L @ 72h

in-vitro,

Nor,

MRC-5

tumCV↓, reduced the vitality of KON cells and had minimal effect on MRC cells.
selectivity↑, Owing to the appropriate dosages of quercetin needed to treat these diseases, normal cells do not exhibit any overtly harmful side effects.
TumCCA↑, quercetin increased the percentage of dead cells and cell cycle arrests in the S and G2/M phases.
TumCMig↓, quercetin inhibited KON cells’ capacity for migration and invasion in addition to their effects on cell stability and structure
TumCI↓,
Apoptosis↑, inducing apoptosis and preventing metastasis, quercetin was found to downregulate the expression of BCL-2/BCL-XL while increasing the expression of BAX.
TumMeta↓,
Bcl-2↓,
BAX↑,
TIMP1↑, TIMP-1 expression was upregulated while MMP-2 and MMP-9 were downregulated.
MMP2↓,
MMP9↓,
*Inflam↓, anti-inflammatory, anti-cancer, antibacterial, antifungal, anti-diabetic, antimalarial, neuroprotective, and cardioprotective properties.
*neuroP↑,
*cardioP↑,
p38↓, MCF-7 cells, quercetin successfully decreased the expression of phosphor p38MAPK, Twist, p21, and Cyclin D1
MAPK↓,
Twist↓,
P21↓,
cycD1/CCND1↓,
Casp3↑, directly aided by the significant increase in caspase-3 and − 9 levels and activities
Casp9↑,
p‑Akt↓, High quercetin concentrations also caused an inhibition of Akt and ERK phosphorylation
p‑ERK↓,
CD44↓, reduced cell division and triggered apoptosis, albeit to a lesser degree in CD44+/CD24− cells.
CD24↓,
ChemoSen↑, combination of quercetin and doxorubicin caused G2/M arrest in T47D cells, and to a lesser amount in cancer stem cells (CSCs) that were isolate
MMP↓, (lower levels of ΔΨ m), which is followed by the release of Cyto C, AIF, and Endo G from mitochondria, which causes apoptosis and ultimately leads to cell death.
Cyt‑c↑,
AIF↑,
ROS↑, Compared to the control group, quercetin administration significantly raised ROS levels at 25, 50, 100, 200, and 400 µg/mL.
Ca+2↑, increased production of reactive oxygen species and Ca2+, decreased levels of mitochondrial membrane potential (ΔΨ m),
Hif1a↓, Quercetin treatment resulted in a considerable downregulation of HIF-1α, VEGF, MMP2, and MMP9 mRNA and protein expression levels in HOS cells.
VEGF↓,

3347-

QC,

Recent Advances in Potential Health Benefits of Quercetin

Review,

Var,

Review,

AD,

*antiOx↑, Its strong antioxidant properties enable it to scavenge free radicals, reduce oxidative stress, and protect against cellular damage.
*ROS↓,
*Inflam↓, Quercetin’s anti-inflammatory properties involve inhibiting the production of inflammatory cytokines and enzymes,
TumCP↓, exhibits anticancer effects by inhibiting cancer cell proliferation and inducing apoptosis.
Apoptosis↑,
*cardioP↑, cardiovascular benefits such as lowering blood pressure, reducing cholesterol levels, and improving endothelial function
*BP↓, Quercetin‘s ability to reduce blood pressure was also supported by a different investigation
TumMeta↓, The most important impact of quercetin is its ability to inhibit the spread of certain cancers including those of the breast, cervical, lung, colon, prostate, and liver
MDR1↓, quercetin decreased the expression of genes multidrug resistance protein 1 and NAD(P)H quinone oxidoreductase 1 and sensitized MCF-7 cells to the chemotherapy medication doxorubicin
NADPH↓,
ChemoSen↑,
MMPs↓, Inhibiting CT26 cells’ migration and invasion abilities by inhibiting their expression of tissue inhibitors of metalloproteinases (TIMPs) inhibits their invasion and migration abilities
TIMP2↑,
*NLRP3↓, inhibited NLRP3 by acting on this inflammasome
*IFN-γ↑, quercetin significantly upregulates the gene expression and production of interferon-γ (IFN-γ), which is obtained from T helper cell 1 (Th1), and downregulates IL-4, which is obtained from Th2.
*COX2/PTGS2↓, quercetin is known to decrease the production of inflammatory molecules COX-2, nuclear factor-kappa B (NF-κB), activator protein 1 (AP-1), mitogen-activated protein kinase (MAPK), reactive nitric oxide synthase (NOS), and reactive C-protein (CRP)
*NF-kB↓,
*MAPK↓,
*CRP↓,
*IL6↓, Quercetin suppressed the production of inflammatory cytokines such as IL-6, TNF-α, and IL-1β via upregulating TLR4.
*TNF-α↓,
*IL1β↓,
*TLR4↑,
*PKCδ↓, Quercetin employed suppression on the phosphorylation of PKCδ to control the PKCδ–JNK1/2–c-Jun pathway.
*AP-1↓, This pathway arrested the accumulation of AP-1 transcription factor in the target genes, thereby resulting in reduced ICAM-1 and inflammatory inhabitation
*ICAM-1↓,
*NRF2↑, Quercetin overexpressed Nrf2 and targeted its downstream gene, contributing to increased HO-1 levels responsible for the down-regulation of TNF-α, iNOS, and IL-6
*HO-1↑,
*lipid-P↓, Quercetin acts as a potent antioxidant by scavenging ROS, inhibiting lipid peroxidation, and enhancing the activity of antioxidant enzymes
*neuroP↑, This helps to counteract oxidative stress and protect against neurodegenerative processes that contribute to AD
*eff↑, rats treated with chronic rotenone or 3-nitropropionic acid showed enhanced neuroprotection when quercetin and fish oil were taken orally
*memory↑, Both memory and learning abilities in the test animals increased
*cognitive↑,
*AChE↓, The increase in AChE activity brought on by diabetes was prevented in the cerebral cortex and hippocampus by quercetin at a level of 50 mg/kg body weight.
*BioAv↑, consumption of fried onions compared to black tea, suggesting that the form of quercetin present in onions is better absorbed than that in tea
*BioAv↑, This suggests that dietary fat can increase the absorption of quercetin [180]
*BioAv↑, potential of liposomes to enhance the bioactivity and bioavailability of quercetin has been the subject of several investigations
*BioAv↑, several emulsion types that may be employed to encapsulate quercetin, but oil-in-water (O/W) emulsions are the most widely utilized.
*BioAv↑, the kind of oil (triglyceride oils made up of either long-chain or medium-chain fatty acids) affected the bioaccessibility of quercetin and gastrointestinal stability, emphasizing the significance of picking a suitable oil phase

3343-

QC,

Quercetin, a Flavonoid with Great Pharmacological Capacity

Review,

Var,

Review,

AD,

Review,

Arthritis,

*antiOx↑, Quercetin has a potent antioxidant capacity, being able to capture reactive oxygen species (ROS), reactive nitrogen species (RNS), and reactive chlorine species (ROC),which act as reducing agents by chelating transition-metal ions.
*ROS↓, Quercetin is a potent scavenger of reactive oxygen species (ROS), protecting the organism against oxidative stress
*angioG↓,
*Inflam↓, anti-inflammatory properties; the ability to protect low-density lipoprotein (LDL) oxidation, and the ability to inhibit angiogenesis;
*BioAv↓, It is known that the bioavailability of quercetin is usually relatively low (0.17–7 μg/mL), less than 10% of what is consumed, due to its poor water solubility (hydrophobicity), chemical stability, and absorption profile.
*Half-Life↑, their slow elimination since their half-life ranges from 11 to 48 h, which could favor their accumulation in plasma after repeated intakes
*GSH↑, Animal and cell studies have demonstrated that quercetin induces the synthesis of GSH
*SOD↑, increase in the expression of superoxide dismutase (SOD), catalase (CAT), and GSH with quercetin pretreatment
*Catalase↑,
*Nrf1↑, quercetin accomplishes this process involves increasing the activity of the nuclear factor erythroid 2-related factor 2 (NRF2), enhancing its binding to the ARE, reducing its degradation
*BP↓, quercetin has been shown to inhibit ACE activity, reducing blood pressure
*cardioP↑, quercetin has positive effects on cardiovascular diseases
*IL10↓, Under the influence of quercetin, the levels of interleukin 10 (IL-10), IL-1β, and TNF-α were reduced.
*TNF-α↓,
*Aβ↓, quercetin’s ability to modulate the enzyme activity in clearing amyloid-beta (Aβ) plaques, a hallmark of AD pathology.
*GSK‐3β↓, quercetin can inhibit the activity of glycogen synthase kinase 3β,
*tau↓, thus reducing tau aggregation and neurofibrillary tangles in the brain
*neuroP↑,
*Pain↓, quercetin reduces pain and inflammation associated with arthritis
*COX2/PTGS2↓, quercetin included the inhibition of oxidative stress, production of cytokines such as cyclooxygenase-2 (COX-2) and proteoglycan degradation, and activation of the nuclear factor erythroid 2-related factor 2 (Nrf2)/heme oxygenase-1 (HO-1) (Nrf2/HO-1)
*NRF2↑,
*HO-1↑,
*IL1β↓, Mechanisms included decreased levels of TNF-α, IL-1β, IL-17, and monocyte chemoattractant protein-1 (MCP-1)
*IL17↓,
*MCP1/CCL2↓,
PKCδ↓, studies with human leukemia 60 (HL-60) cells report that concentrations between 20 and 30 µM are sufficient to exert an inhibitory effect on cytosolic PKC activity and membrane tyrosine protein kinase (TPK) activity.
ERK↓, 50 µM resulted in the blockade of the extracellular signal-regulated kinases (ERK1/2) pathway
BAX↓, higher doses (75–100 µM) were used, as these doses reduced the expression of proapoptotic factors such as Bcl-2-associated X protein (Bax) and caspases 3 and 9
cMyc↓, induce apoptosis at concentrations of 80 µM and also causes a downregulation of cellular myelocytomatosis (c-myc) and Kirsten RAt sarcoma (K-ras) oncogenes
KRAS↓,
ROS↓, compound’s antioxidative effect changes entirely to a prooxidant effect at high concentrations, which induces selective cytotoxicity
selectivity↑, On the other hand, when noncancerous cells are exposed to quercetin, it exerts cytoprotective effects;
tumCV↓, decrease cell viability in human glioma cultures of the U-118 MG cell line as well as an increase in death by apoptosis and cell arrest at the G2 checkpoint of the cell cycle.
Apoptosis↑,
TumCCA↑,
eff↑, quercetin combined with doxorubicin can induce multinucleation of invasive tumor cells, downregulate P-glycoprotein (P-gp) expression, increase cell sensitivity to doxorubicin,
P-gp/ABCB1↓,
eff↑, resveratrol, quercetin, and catechin can effectively block the cell cycle and reduce cell proliferation in vivo
eff↑, cotreatment with epigallocatechin gallate (EGCG) inhibited catechol-O-methyltransferase (COMT) activity, decreasing COMT protein content and thereby arresting the cell cycle of PC-3 human prostate cancer cells
eff↑, synergistic treatment of tamoxifen and quercetin was also able to inhibit prostate tumor formation by regulating angiogenesis
eff↑, coadministration of 2.5 μM of EGCG, genistein, and quercetin suppressed the cell proliferation of a prostate cancer cell line (CWR22Rv1) by controlling androgen receptor and NAD (P)H: quinone oxidoreductase 1 (NQO1) expression
CycB/CCNB1↓, It can also downregulate cyclin B1 and cyclin-dependent kinase-1 (CDK-1),
CDK1↓,
CDK4↓, quercetin causes a decrease in cyclins D1/Cdk4 and E/Cdk2 and an increase in p21 in vascular smooth muscle cells
CDK2↓,
TOP2↓, quercetin is known to be a potent inhibitor of topoisomerase II (TopoII), a cell cycle-associated enzyme necessary for DNA replication
Cyt‑c↑, quercetin can induce apoptosis (cell death) through caspase-3 and caspase-9 activation, cytochrome c release, and poly ADP ribose polymerase (PARP) cleavage
cl‑PARP↑,
MMP↓, quercetin induces the loss of mitochondrial membrane potential, leading to the activation of the caspase cascade and cleavage of PARP.
HSP70/HSPA5↓, apoptotic effects of quercetin may result from the inhibition of HSP kinases, followed by the downregulation of HSP-70 and HSP-90 protein expression
HSP90↓,
MDM2↓, (MDM2), an onco-protein that promotes p53 destruction, can be inhibited by quercetin
RAS↓, quercetin can prevent Ras proteins from being expressed. In one study, quercetin was found to inhibit the expression of Harvey rat sarcoma (H-Ras), K-Ras, and neuroblastoma rat sarcoma (N-Ras) in human breast cancer cells,
eff↑, there was a substantial difference in EMT markers such as vimentin, N-cadherin, Snail, Slug, Twist, and E-cadherin protein expression in response to AuNPs-Qu-5, inhibiting the migration and invasion of MCF-7 and MDA-MB cells

3341-

QC,

Antioxidant Activities of Quercetin and Its Complexes for Medicinal Application

Review,

Var,

Review,

Stroke,

*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↓,

3374-

QC,

Therapeutic effects of quercetin in oral cancer therapy: a systematic review of preclinical evidence focused on oxidative damage, apoptosis and anti-metastasis

Review,

Oral,

Review,

AD,

α-SMA↓, In oral cancer cells, quercetin could inhibit EMT via up-regulation of claudin-1 and E-cadherin and down-regulation of α-SMA, vimentin, fibronectin, and Slug [29]
α-SMA↑, OSC20 Invasion: ↓Migration, ↑Expression of epithelial markers (E-cadherin & claudin-1), ↑Expression of mesenchymal markers (fibronectin, vimentin, & α-SMA),
TumCP↓, quercetin significantly reduced cancer cell proliferation, cell viability, tumor volume, invasion, metastasis and migration
tumCV↓,
TumVol↓,
TumCI↓,
TumMeta↓,
TumCMig↓,
ROS↑, This anti-cancer agent induced oxidative stress and apoptosis in the cancer cells.
Apoptosis↑,
BioAv↓, The efficacy of quercetin (as lipophilic) is much impacted by its poor absorption rates, which define its bioavailability. The research on quercetin's bioavailability in animal models shows it may be as low as 10%
*neuroP↑, quercetin has been observed to exhibit neuroprotective effects in Alzheimer's disease through its anti-oxidants, and anti-inflammatory properties and inhibition of amyloid-β (Aβ) fibril formation
*antiOx↑,
*Inflam↓,
*Aβ↓,
*cardioP↑, Additionally, quercetin protects the heart by stopping oxidative stress, inflammation, apoptosis, and protein kinases
MMP↓, ↓MMP, ↑Cytosolic Cyt. C,
Cyt‑c↑,
MMP2↓, ↓Activation MMP-2 & MMP-9, ↓Expression levels of EMT inducers & MMPs, Downregulated Twist & Slug
MMP9↓,
EMT↓,
MMPs↓,
Twist↓,
Slug↓,
Ca+2↑, ↑Apoptosis, ↑ROS, ↑Ca2+ production, ↑Activities of caspase‑3, caspase‑8 & caspase‑9
AIF↑, ↑Mitochondrial release of Cyt. C, AIF, & Endo G
Endon↑,
P-gp/ABCB1↓, ↓ Protein levels of P-gp, & P-gp Expression
LDH↑, ↑LDH release
HK2↓, CAL27 cells) 80µM/24h Molecular markers: ↓Activities of HK, PK, & LDH, ↓Glycolysis, ↓Glucose uptake, ↓Lactate production, ↓Viability, ↓G3BP1, & YWHA2 protein levels
PKA↓,
Glycolysis↓,
GlucoseCon↓,
lactateProd↓,
GRP78/BiP↑, Quercetin controls the activation of intracellular Ca2+ and calpain-1, which then activates GRP78, caspase-12, and C/EBP homologous protein (CHOP) in oral cancer cells
Casp12↑,
CHOP/DDIT3↑,

Showing Research Papers: 1 to 11 of 11

* indicates research on normal cells as opposed to diseased cells
Total Research Paper Matches: 11

Pathway results for Effect on Cancer / Diseased Cells:

Pathway results for Effect on Normal Cells:

Redox & Oxidative Stress(tgid=1) ⓘ

antiOx↑, 5, Catalase↑, 3, GPx↑, 2, GSH↑, 3, H2O2↓, 1, HO-1↑, 4, lipid-P↓, 3, MDA↓, 2, NOX4↓, 1, NQO1↑, 1, Nrf1↑, 1, NRF2↓, 1, NRF2↑, 3, ROS↓, 7, SOD↑, 2, SOD2↑, 1,

Metal & Cofactor Biology(tgid=2) ⓘ

IronCh↓, 1,

Core Metabolism/Glycolysis(tgid=4) ⓘ

FASN↓, 1, LDH↓, 1, LDL↓, 1, SIRT1↑, 2,

Cell Death(tgid=5) ⓘ

Akt↑, 2, BAX↓, 1, Bax:Bcl2↓, 1, Bcl-2↑, 1, MAPK↓, 1,

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

GSK‐3β↓, 1, PI3K↑, 2,

Migration(tgid=13) ⓘ

AntiAg↑, 1, AP-1↓, 1, Ca+2↓, 1, PKCδ↓, 1,

Angiogenesis & Vasculature(tgid=14) ⓘ

angioG↓, 1, Hif1a↑, 1,

Immune & Inflammatory Signaling(tgid=16) ⓘ

COX2/PTGS2↓, 3, CRP↓, 1, ICAM-1↓, 1, IFN-γ↑, 1, IKKα↓, 1, IL10↓, 1, IL17↓, 1, IL1β↓, 2, IL6↓, 3, IL8↓, 1, Inflam↓, 8, MCP1/CCL2↓, 1, NF-kB↓, 3, p65↓, 1, TLR4↑, 1, TNF-α↓, 3,

Synaptic & Neurotransmission(tgid=18) ⓘ

AChE↓, 2, BChE↓, 1, tau↓, 1,

Protein Aggregation(tgid=19) ⓘ

Aβ↓, 2, NLRP3↓, 1,

Drug Metabolism & Resistance(tgid=21) ⓘ

BioAv↓, 1, BioAv↑, 6, eff↑, 1, Half-Life↑, 1,

Clinical Biomarkers(tgid=22) ⓘ

BP↓, 3, CRP↓, 1, IL6↓, 3, LDH↓, 1,

Functional Outcomes(tgid=23) ⓘ

cardioP↑, 10, cognitive↑, 2, hepatoP↑, 1, memory↑, 1, neuroP↑, 6, Pain↓, 1,
Total Targets: 69

Scientific Paper Hit Count for: cardioP, cardioProtective

11 Quercetin
1 doxorubicin
1 Lycopene

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#:140  Target#:1188  State#:%  Dir#:%
  wNotes=on  sortOrder:rid,rpid

Quercetin / cardioP Cancer Research Results

Pathway results for Effect on Cancer / Diseased Cells:

Redox & Oxidative Stress(tgid=1) ⓘ

Mitochondria & Bioenergetics(tgid=3) ⓘ

Core Metabolism/Glycolysis(tgid=4) ⓘ

Cell Death(tgid=5) ⓘ

Transcription & Epigenetics(tgid=7) ⓘ

Protein Folding & ER Stress(tgid=8) ⓘ

DNA Damage & Repair(tgid=10) ⓘ

Cell Cycle & Senescence(tgid=11) ⓘ

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

Migration(tgid=13) ⓘ

Angiogenesis & Vasculature(tgid=14) ⓘ

Barriers & Transport(tgid=15) ⓘ

Immune & Inflammatory Signaling(tgid=16) ⓘ

Hormonal & Nuclear Receptors(tgid=20) ⓘ

Drug Metabolism & Resistance(tgid=21) ⓘ

Clinical Biomarkers(tgid=22) ⓘ

Functional Outcomes(tgid=23) ⓘ

Pathway results for Effect on Normal Cells:

Redox & Oxidative Stress(tgid=1) ⓘ

Metal & Cofactor Biology(tgid=2) ⓘ

Core Metabolism/Glycolysis(tgid=4) ⓘ

Cell Death(tgid=5) ⓘ

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

Migration(tgid=13) ⓘ

Angiogenesis & Vasculature(tgid=14) ⓘ

Immune & Inflammatory Signaling(tgid=16) ⓘ

Synaptic & Neurotransmission(tgid=18) ⓘ

Protein Aggregation(tgid=19) ⓘ

Drug Metabolism & Resistance(tgid=21) ⓘ

Clinical Biomarkers(tgid=22) ⓘ

Functional Outcomes(tgid=23) ⓘ

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