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| 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
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| 35- | QC, | Quercetin may act as a cytotoxic prooxidant after its metabolic activation to semiquinone and quinoidal product |
| - | Study, | NA, | NA |
| 36- | QC, | Quercetin induces G2 phase arrest and apoptosis with the activation of p53 in an E6 expression-independent manner in HPV-positive human cervical cancer-derived cells |
| - | in-vitro, | Cerv, | HeLa | - | in-vitro, | Cerv, | SiHa |
| 37- | QC, | Low Concentrations of Flavonoids Are Protective in Rat H4IIE Cells Whereas High Concentrations Cause DNA Damage and Apoptosis |
| - | in-vivo, | Hepat, | H4IIE |
| 38- | QC, | Quercetin inhibits prostate cancer by attenuating cell survival and inhibiting anti-apoptotic pathways |
| - | in-vitro, | Pca, | DU145 | - | in-vitro, | Pca, | PC3 |
| 39- | QC, | A Comprehensive Analysis and Anti-Cancer Activities of Quercetin in ROS-Mediated Cancer and Cancer Stem Cells |
| - | Analysis, | NA, | NA |
| 40- | QC, | Quercetin arrests G2/M phase and induces caspase-dependent cell death in U937 cells |
| - | in-vitro, | lymphoma, | U937 |
| 41- | QC, | Quercetin induces mitochondrial-derived apoptosis via reactive oxygen species-mediated ERK activation in HL-60 leukemia cells and xenograft |
| - | vitro+vivo, | AML, | HL-60 |
| 42- | QC, | Quercetin induces apoptosis by activating caspase-3 and regulating Bcl-2 and cyclooxygenase-2 pathways in human HL-60 cells |
| - | in-vitro, | AML, | HL-60 |
| 68- | QC, | BaP, | Differential protein expression of peroxiredoxin I and II by benzo(a)pyrene and quercetin treatment in 22Rv1 and PrEC prostate cell lines |
| - | in-vitro, | Pca, | 22Rv1 | - | in-vitro, | Pca, | PrEC |
| 44- | QC, | Preclinical Colorectal Cancer Chemopreventive Efficacy and p53-Modulating Activity of 3′,4′,5′-Trimethoxyflavonol, a Quercetin Analog |
| - | in-vivo, | CRC, | HCT116 |
| 45- | QC, | Quercetin Inhibit Human SW480 Colon Cancer Growth in Association with Inhibition of Cyclin D1 and Survivin Expression through Wnt/β-Catenin Signaling Pathway |
| - | in-vitro, | Colon, | CX-1 | - | in-vitro, | Colon, | SW480 | - | in-vitro, | Colon, | HT-29 | - | in-vitro, | Colon, | HCT116 |
| 46- | QC, | Quercetin, but Not Its Glycosidated Conjugate Rutin, Inhibits Azoxymethane-Induced Colorectal Carcinogenesis in F344 Rats |
| - | in-vitro, | Colon, | F344 |
| 47- | QC, | Induction of death receptor 5 and suppression of survivin contribute to sensitization of TRAIL-induced cytotoxicity by quercetin in non-small cell lung cancer cells |
| - | in-vitro, | NSCLC, | H460 | - | in-vitro, | NSCLC, | A549 |
| 48- | QC, | Quercetin Potentiates Apoptosis by Inhibiting Nuclear Factor-kappaB Signaling in H460 Lung Cancer Cells |
| - | in-vitro, | NSCLC, | H460 |
| 49- | QC, | Plasma rich in quercetin metabolites induces G2/M arrest by upregulating PPAR-γ expression in human A549 lung cancer cells |
| - | in-vitro, | Lung, | A549 |
| 50- | QC, | Anticancer effect and mechanism of polymer micelle-encapsulated quercetin on ovarian cancer |
| - | vitro+vivo, | Ovarian, | A2780S |
| 86- | QC, | PacT, | Quercetin regulates insulin like growth factor signaling and induces intrinsic and extrinsic pathway mediated apoptosis in androgen independent prostate cancer cells (PC-3) |
| - | vitro+vivo, | Pca, | PC3 |
| 97- | QC, | HPT, | Effects of the flavonoid drug Quercetin on the response of human prostate tumours to hyperthermia in vitro and in vivo |
| - | in-vitro, | Pca, | PC3 |
| 96- | QC, | docx, | Quercetin reverses docetaxel resistance in prostate cancer via androgen receptor and PI3K/Akt signaling pathways |
| - | vitro+vivo, | Pca, | LNCaP | - | in-vitro, | Pca, | PC3 |
| 95- | QC, | Quercetin, a natural dietary flavonoid, acts as a chemopreventive agent |
| - | in-vitro, | Pca, | PC3 |
| 94- | QC, | HPT, | Effects of quercetin on the heat-induced cytotoxicity of prostate cancer cells |
| - | in-vitro, | Pca, | LNCaP | - | in-vitro, | Pca, | PC3 | - | in-vitro, | Pca, | JCA-1 |
| 93- | QC, | Chemical Proteomics Identifies Heterogeneous Nuclear Ribonucleoprotein (hnRNP) A1 as the Molecular Target of Quercetin in Its Anti-cancer Effects in PC-3 Cells |
| - | in-vitro, | Pca, | PC3 |
| 92- | QC, | Quercetin Inhibits Angiogenesis Mediated Human Prostate Tumor Growth by Targeting VEGFR- 2 Regulated AKT/mTOR/P70S6K Signaling Pathways |
| - | vitro+vivo, | Pca, | HUVECs | - | vitro+vivo, | Pca, | PC3 |
| 91- | QC, | The roles of endoplasmic reticulum stress and mitochondrial apoptotic signaling pathway in quercetin-mediated cell death of human prostate cancer PC-3 cells |
| - | in-vitro, | Pca, | PC3 |
| 90- | QC, | HYP, | Combination of quercetin and hyperoside inhibits prostate cancer cell growth and metastasis via regulation of microRNA‑21 |
| - | in-vitro, | Pca, | PC3 |
| 89- | QC, | doxoR, | Quercetin reverses the doxorubicin resistance of prostate cancer cells by downregulating the expression of c-met |
| - | in-vitro, | Pca, | PC3 |
| 88- | QC, | PacT, | Quercetin Enhanced Paclitaxel Therapeutic Effects Towards PC-3 Prostate Cancer Through ER Stress Induction and ROS Production |
| - | vitro+vivo, | Pca, | PC3 |
| 87- | QC, | Quercetin inhibits prostate cancer by attenuating cell survival and inhibiting anti-apoptotic pathways |
| - | in-vitro, | Pca, | LNCaP | - | in-vitro, | Pca, | DU145 | - | in-vitro, | Pca, | PC3 |
| 69- | QC, | Quercetin enhances TRAIL-induced apoptosis in prostate cancer cells via increased protein stability of death receptor 5 |
| - | in-vitro, | Pca, | DU145 | - | in-vitro, | Pca, | PC3 | - | in-vitro, | Pca, | LNCaP |
| 85- | QC, | Quercetin inhibits invasion, migration and signalling molecules involved in cell survival and proliferation of prostate cancer cell line (PC-3) |
| - | in-vitro, | Pca, | PC3 |
| 84- | QC, | Quercetin-induced growth inhibition and cell death in prostatic carcinoma cells (PC-3) are associated with increase in p21 and hypophosphorylated retinoblastoma proteins expression |
| - | in-vitro, | Pca, | PC3 |
| 74- | QC, | EGCG, | Prospective randomized trial evaluating blood and prostate tissue concentrations of green tea polyphenols and quercetin in men with prostate cancer |
| - | Human, | Pca, | NA |
| 70- | QC, | Quercetin inhibits the expression and function of the androgen receptor in LNCaP prostate cancer cells |
| - | in-vitro, | Pca, | LNCaP | - | in-vitro, | Pca, | LAPC-4 |
| 71- | QC, | Role of Bax in quercetin-induced apoptosis in human prostate cancer cells |
| - | in-vitro, | Pca, | LNCaP | - | in-vitro, | Pca, | PrEC | - | in-vitro, | Pca, | YPEN-1 | - | in-vitro, | Pca, | HCT116 |
| 72- | QC, | Se, | Selenium- or quercetin-induced retardation of DNA synthesis in primary prostate cells occurs in the presence of a concomitant reduction in androgen-receptor activity |
| - | in-vitro, | Pca, | PECs | - | in-vitro, | Pca, | LNCaP | - | in-vitro, | Pca, | NIH-3T3 |
| 73- | QC, | The dietary bioflavonoid, quercetin, selectively induces apoptosis of prostate cancer cells by down-regulating the expression of heat shock protein 90 |
| - | in-vitro, | Pca, | LNCaP | - | in-vitro, | Pca, | DU145 | - | in-vitro, | Pca, | PC3 |
| 75- | QC, | ENZ, | Quercetin targets hnRNPA1 to overcome enzalutamide resistance in prostate cancer cells |
| - | in-vitro, | Pca, | HEK293 | - | in-vitro, | NA, | 22Rv1 | - | in-vitro, | NA, | C4-2B |
| 76- | QC, | Multifaceted preventive effects of single agent quercetin on a human prostate adenocarcinoma cell line (PC-3): implications for nutritional transcriptomics and multi-target therapy |
| - | in-vitro, | Pca, | PC3 |
| - | in-vitro, | Pca, | CD44+ | - | in-vitro, | NA, | CD133+ | - | in-vitro, | NA, | PC3 | - | in-vitro, | NA, | LNCaP |
| 78- | QC, | Effects of quercetin on insulin-like growth factors (IGFs) and their binding protein-3 (IGFBP-3) secretion and induction of apoptosis in human prostate cancer cells |
| - | in-vitro, | Pca, | PC3 |
| 79- | QC, | Chemopreventive Effect of Quercetin in MNU and Testosterone Induced Prostate Cancer of Sprague-Dawley Rats |
| - | in-vivo, | Pca, | NA |
| 80- | QC, | Quercetin reverses EGF-induced epithelial to mesenchymal transition and invasiveness in prostate cancer (PC-3) cell line via EGFR/PI3K/Akt pathway |
| - | in-vitro, | Pca, | PC3 |
| 81- | QC, | EGCG, | Enhanced inhibition of prostate cancer xenograft tumor growth by combining quercetin and green tea |
| - | in-vivo, | Pca, | NA |
| 82- | QC, | ATG, | Arctigenin in combination with quercetin synergistically enhances the anti-proliferative effect in prostate cancer cells |
| - | in-vitro, | Pca, | LNCaP |
| 83- | QC, | Quercetin induces p53-independent apoptosis in human prostate cancer cells by modulating Bcl-2-related proteins: a possible mediation by IGFBP-3 |
| - | in-vitro, | Pca, | PC3 |
| 3610- | QC, | Bioavailability of quercetin: problems and promises |
| 3611- | QC, | Quercetin and vitamin C supplementation: effects on lipid profile and muscle damage in male athletes |
| - | Trial, | Nor, | NA |
| 4296- | QC, | A Flavonoid on the Brain: Quercetin as a Potential Therapeutic Agent in Central Nervous System Disorders |
| - | Review, | AD, | NA |
| 3796- | QC, | BBR, | Biomarker discovery and phytochemical interventions in Alzheimer's disease: A path to therapeutic advances |
| - | Review, | AD, | NA |
| 4162- | QC, | Quercetin attenuates cell apoptosis in focal cerebral ischemia rat brain via activation of BDNF-TrkB-PI3K/Akt signaling pathway |
| - | in-vivo, | Stroke, | NA |
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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