Quercetin / pRB 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.

-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


pRB, retinoblastoma protein: Click to Expand ⟱
Source: Tumor suspressor
Type:
pRB, or retinoblastoma protein, is a crucial tumor suppressor that plays a significant role in regulating the cell cycle. It is encoded by the RB1 gene, and its primary function is to control the progression of cells from the G1 phase to the S phase of the cell cycle. When functioning properly, pRB binds to and inhibits E2F transcription factors, which are necessary for the expression of genes required for DNA synthesis and cell division.
pRB is often found to be downregulated or functionally inactivated due to mutations in the RB1 gene or through other mechanisms.


Scientific Papers found: Click to Expand⟱
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
P21↑, cDC2↓, CDK1↓, CycB/CCNB1↓, Casp3↑, Bcl-2↓, Bcl-xL↓, BAX↑, pRB↓, TumCCA↑, Apoptosis↑,
3369- QC,    Pharmacological basis and new insights of quercetin action in respect to its anti-cancer effects
- Review, Pca, NA
FAK↓, TumCCA↑, p‑pRB↓, CDK2↑, CycB/CCNB1↓, CDK1↓, EMT↓, PI3K↓, MAPK↓, Wnt↓, ROS↑, miR-21↑, Akt↓, NF-kB↓, FasL↑, Bak↑, BAX↑, Bcl-2↓, Casp3↓, Casp9↑, P53↑, p38↑, MAPK↑, Cyt‑c↑, PARP↓, CHOP↑, ROS↓, LDH↑, GRP78/BiP↑, ERK↑, MDA↓, SOD↑, GSH↑, NRF2↑, VEGF↓, PDGF↓, EGF↓, FGF↓, TNF-α↓, TGF-β↓, VEGFR2↓, EGFR↓, FGFR1↓, mTOR↓, cMyc↓, MMPs↓, LC3B-II↑, Beclin-1↑, IL1β↓, CRP↓, IL10↓, COX2↓, IL6↓, TLR4↓, Shh↓, HER2/EBBR2↓, NOTCH↓, DR5↑, HSP70/HSPA5↓, CSCs↓, angioG↓, MMP2↓, MMP9↓, IGFBP3↑, uPA↓, uPAR↓, RAS↓, Raf↓, TSP-1↑,

Showing Research Papers: 1 to 2 of 2

* indicates research on normal cells as opposed to diseased cells
Total Research Paper Matches: 2

Pathway results for Effect on Cancer / Diseased Cells:


Redox & Oxidative Stress ⓘ

GSH↑, 1,   MDA↓, 1,   NRF2↑, 1,   ROS↓, 1,   ROS↑, 1,   SOD↑, 1,  

Mitochondria & Bioenergetics ⓘ

EGF↓, 1,   FGFR1↓, 1,   Raf↓, 1,  

Core Metabolism/Glycolysis ⓘ

cMyc↓, 1,   LDH↑, 1,  

Cell Death ⓘ

Akt↓, 1,   Apoptosis↑, 1,   Bak↑, 1,   BAX↑, 2,   Bcl-2↓, 2,   Bcl-xL↓, 1,   Casp3↓, 1,   Casp3↑, 1,   Casp9↑, 1,   Cyt‑c↑, 1,   DR5↑, 1,   FasL↑, 1,   MAPK↓, 1,   MAPK↑, 1,   p38↑, 1,  

Kinase & Signal Transduction ⓘ

HER2/EBBR2↓, 1,  

Transcription & Epigenetics ⓘ

miR-21↑, 1,   pRB↓, 1,   p‑pRB↓, 1,  

Protein Folding & ER Stress ⓘ

CHOP↑, 1,   GRP78/BiP↑, 1,   HSP70/HSPA5↓, 1,  

Autophagy & Lysosomes ⓘ

Beclin-1↑, 1,   LC3B-II↑, 1,  

DNA Damage & Repair ⓘ

P53↑, 1,   PARP↓, 1,  

Cell Cycle & Senescence ⓘ

CDK1↓, 2,   CDK2↑, 1,   CycB/CCNB1↓, 2,   P21↑, 1,   TumCCA↑, 2,  

Proliferation, Differentiation & Cell State ⓘ

cDC2↓, 1,   CSCs↓, 1,   EMT↓, 1,   ERK↑, 1,   FGF↓, 1,   IGFBP3↑, 1,   mTOR↓, 1,   NOTCH↓, 1,   PI3K↓, 1,   RAS↓, 1,   Shh↓, 1,   Wnt↓, 1,  

Migration ⓘ

FAK↓, 1,   MMP2↓, 1,   MMP9↓, 1,   MMPs↓, 1,   PDGF↓, 1,   TGF-β↓, 1,   TSP-1↑, 1,   uPA↓, 1,   uPAR↓, 1,  

Angiogenesis & Vasculature ⓘ

angioG↓, 1,   EGFR↓, 1,   VEGF↓, 1,   VEGFR2↓, 1,  

Immune & Inflammatory Signaling ⓘ

COX2↓, 1,   CRP↓, 1,   IL10↓, 1,   IL1β↓, 1,   IL6↓, 1,   NF-kB↓, 1,   TLR4↓, 1,   TNF-α↓, 1,  

Clinical Biomarkers ⓘ

CRP↓, 1,   EGFR↓, 1,   HER2/EBBR2↓, 1,   IL6↓, 1,   LDH↑, 1,  
Total Targets: 80

Pathway results for Effect on Normal Cells:


Total Targets: 0

Scientific Paper Hit Count for: pRB, retinoblastoma protein
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#:478  State#:%  Dir#:%
  wNotes=0  sortOrder:rid,rpid

 

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