Database Query Results : EGCG (Epigallocatechin Gallate), , CSCs

EGCG, EGCG (Epigallocatechin Gallate): Click to Expand ⟱
Features:
EGCG (Epigallocatechin Gallate) is found in green tea. 100 times more effective than Vitamin C and 25 times more effective than Vitamin E at protecting cells from damage associated with oxidative stress.
EGCG Epigallocatechin Gallate (Green Tea) -Catechin
Summary:
1. Concentration is a factor that could determine whether green tea polyphenols act as antioxidants or pro-oxidants.
2. Poor bioavailability: taking EGCG capsules without food was better.
3. Cancer dosage 4g/day (2g twice per day)? with curcumin may help (another ref says 700–2100 mg/d)
4. EGCG is susceptible to oxidative degradation.
5. “As for the pH level, the acidic environments enhance the stability of EGCG”.
6. “EGCG may enhance nanoparticle uptake by tumor cells”
7. Might be iron chelator (removing iron from cancer cells)
8. Claimed as synergistic effect with chemotherapy ( cisplatin, bleomycin, gemcitabine.
9. May suppress glucose metabolism, interfere with VEGF, downregulate NF-κB and MMP-9, down-regulation of androgen-regulated miRNA-21.
10. Take with red pepper powder, Capsicum ratio 25:1 (based on half life, they did every 4 hr) (chili pepper vanilloid capsaicin).
11. EGCG mediated ROS formation can upregulate CTR1 expression via the ERK1/2/NEAT1 pathway, which can increase the intake of chemotherapeutic drugs such as cisplatin in NSCLC cells and act as a chemosensitizer [58]
12. Matcha green tea has highest EGCG (2-3X) because consuming leaf.
13. EGCG is an ENOX2 inhibitor.
14. Nrf2 activator in both cancer and normal cells. This example of lung cancer show both directions in different cell lines, but both toward optimim level.
Biological activity, EGCG has been reported to exhibit a range of effects, including:
    Antioxidant activity: 10-50 μM
     Anti-inflammatory activity: 20-50 μM
     Anticancer activity: 50-100 μM
     Cardiovascular health: 20-50 μM
     Neuroprotective activity: 10-50 μM

Drinking a cup (or two cups) of green tea (in which one might ingest roughly 50–100 mg of EGCG from brewed tea) generally results in peak plasma EGCG concentrations in the range of approximately 0.1 to 0.6 μM.

With higher, supplement-type doses (e.g., oral doses in the 500 mg–800 mg range that are sometimes studied for clinical benefits), peak plasma concentrations in humans can reach the low micromolar range, often reported around ~1–2 μM and in some cases up to 5 μM.

Reported values can range from about 25–50 mg of EGCG per gram of matcha powder.
In cases where the matcha is exceptionally catechin-rich, the content could reach 200–250 mg or more in 5 g.

-Peak plasma concentration roughly 1 to 2 hours after oral ingestion.
-Elimination half-life of EGCG in plasma is commonly reported to be in the range of about 3 to 5 hours.

Supplemental EGCG
Dose (mg)   ≈ Peak Plasma EGCG (µM)
~50 mg          ≈ 0.1–0.3 µM
~100 mg         ≈ 0.2–0.6 µM
~250 mg         ≈ 0.5–1.0 µM
~500 mg         ≈ 1–2 µM
~800 mg or higher  ≈ 1–5 µM

50mg of EGCG in 1g of matcha tea(1/2 teaspoon)

Studies on green tea extracts have employed doses roughly equivalent to 300–800 mg/day of EGCG. Excessive doses can cause liver toxicity in some cases.

Methods to improve bioavailability
-Lipid-based carriers or nanoemulsions
-Polymer-based nanoparticles or encapsulation
-Co-administration with ascorbic acid (vitamin C)
-Co-administration of adjuvants like piperine (perhaps sunflower lecithin and chitosan) -Using multiple smaller doses rather than one large single dose.
-Taking EGCG on an empty stomach or under fasting conditions, or aligning dosing with optimal pH conditions in the GI tract, may improve its absorption.(acidic environment is generally more favorable for its stability and absorption).
– EGCG is more stable under acidic conditions. In the stomach, where the pH is typically around 1.5 to 3.5, EGCG is less prone to degradation compared to the more neutral or basic environments of the small intestine.
- At neutral (around pH 7) or alkaline pH, EGCG undergoes auto-oxidation, reducing the effective concentration available for absorption.
– Although the stomach’s acidic pH helps maintain EGCG’s stability, most absorption occurs in the small intestine, where the pH is closer to neutral.
– To counterbalance the inherent instability in the intestine, strategies such as co-administration of pH-modifying agents (like vitamin C) are sometimes used. These agents help to maintain a slightly acidic environment in the gut microenvironment, potentially improving EGCG stability during its transit and absorption.
– The use of acidifiers or buffering agents in supplements may help preserve EGCG until it reaches the absorption sites.

-Note half-life 3–5 hours.
- low BioAv 1%? despite its limited absorption, it is rapidly disseminated throughout the body
Pathways:
- induce ROS production
- ROS↑ related: MMP↓(ΔΨm), ER Stress↑, UPR↑, GRP78↑, Ca+2↑, Cyt‑c↑, Caspases↑, DNA damage↑, cl-PARP↑, HSP↓, Prx,
- Does NOT Lower AntiOxidant defense in Cancer Cells: NRF2↑, TrxR↓**, SOD, GSH Catalase HO1 GPx
- 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↓, IGF-1↓, uPA↓, VEGF↓, FAK↓, RhoA↓, NF-κB↓, TGF-β↓, α-SMA↓, ERK↓
- reactivate genes thereby inhibiting cancer cell growth : HDAC↓, DNMTs↓, EZH2↓, P53↑, HSP↓, Sp proteins↓,
- cause Cell cycle arrest : TumCCA↑, cyclin D1↓, cyclin E↓, CDK2↓, CDK4↓, CDK6↓,
- inhibits Migration/Invasion : TumCMig↓, TumCI↓, TNF-α↓, FAK↓, ERK↓, EMT↓, TOP1↓,
- inhibits glycolysis /Warburg Effect and ATP depletion : HIF-1α↓, PKM2↓, cMyc↓, GLUT1↓, LDH↓, LDHA↓, HK2↓, PFKs↓, ECAR↓, OXPHOS↓, GRP78↑, Glucose↓, GlucoseCon↓
- inhibits angiogenesis↓ : VEGF↓, HIF-1α↓, Notch↓, FGF↓, PDGF↓, EGFR↓, Integrins↓,
- inhibits Cancer Stem Cells : CSC↓, Hh↓, GLi↓, GLi1↓, CD133↓, CD24↓, β-catenin↓, n-myc↓, Notch↓, OCT4↓,
- Others: PI3K↓, AKT↓, JAK↓, STAT↓, Wnt↓, β-catenin↓, AMPK, ERK↓, JNK, - SREBP (related to cholesterol).
- Synergies: chemo-sensitization, chemoProtective, RadioSensitizer, RadioProtective, Others(review target notes), Neuroprotective, Cognitive, Renoprotection, Hepatoprotective(possible damage at high dose), CardioProtective,

- Selectivity: Cancer Cells vs Normal Cells


CSCs, Cancer Stem Cells: Click to Expand ⟱
Source:
Type:
Cancer Stem Cells

Phytochemicals (natural plant-derived compounds) that may affect CSCs:
Curcumin
— suppresses self-renewal and pathways (Wnt/Notch/Hedgehog).
Resveratrol
— shown to reduce CSC populations and sphere formation in multiple models.
Sulforaphane (from broccoli sprouts)
— reported to inhibit CSC properties and pathways; active in vitro and in vivo.
EGCG (epigallocatechin-3-gallate, green tea)
— reduces CSC markers and sphere formation in several cancer types.
Quercetin
— reported to inhibit CSC proliferation, self-renewal and invasiveness (breast, endometrial, others).
Berberine
— shown to suppress CSC “stemness” and reduce tumorigenic properties in multiple models.
Genistein (soy isoflavone)
— decreases CSC markers, sphere formation and stemness signaling in prostate/breast/other models.
Honokiol (Magnolia bark)
— shown to eliminate or suppress CSC-like populations in oral, colon, glioma models.
Luteolin
— inhibits stemness/EMT and reduces CSC markers and self-renewal in breast, prostate and other models.
Withaferin A (from Withania somnifera / ashwagandha)
— multiple preclinical reports show WA targets CSCs and reduces tumor growth/metastasis in models.

Circadian disruption in cancer and regulation of cancer stem cells by circadian clock genes: An updated review
Potential Role of the Circadian Clock in the Regulation of Cancer Stem Cells and Cancer Therapy
Can we utilise the circadian clock to target cancer stem cells?
Scientific Papers found: Click to Expand⟱
4656- CUR,  EGCG,    Curcumin and epigallocatechin gallate inhibit the cancer stem cell phenotype via down-regulation of STAT3-NFκB signaling
- in-vitro, BC, MDA-MB-231 - in-vitro, BC, MCF-7
CSCs↓, Combined curcumin and EGCG treatment reduced the cancer stem-like Cluster of differentiation 44 (CD44) positive cell population.
CD44↓,
p‑STAT3↓, curcumin and EGCG specifically inhibited STAT3 phosphorylation and STAT3-NFkB interaction was retained.
NF-kB↓, Notably, curcumin is a potent inhibitor of NFκB
TumCI↓, Wound-healing assay revealed that curcumin and EGCG suppress cell invasiveness

3243- EGCG,    (−)-Epigallocatechin-3-Gallate Inhibits Colorectal Cancer Stem Cells by Suppressing Wnt/β-Catenin Pathway
CD133↓, used to determine the expression of CD133. We revealed that EGCG inhibited the spheroid formation capability of colorectal cancer cells as well as the expression of colorectal CSC markers, along with suppression of cell proliferation and induction o
CSCs↓,
TumCP↓,
Apoptosis↑,
Wnt↓, EGCG downregulated the activation of Wnt/β-catenin pathway,
β-catenin/ZEB1↓,

3244- EGCG,    Novel epigallocatechin gallate (EGCG) analogs activate AMP-activated protein kinase pathway and target cancer stem cells
AMPK↑, In this study we demonstrated that synthetic EGCG analogs 4 and 6 were more potent AMPK activators than metformin and EGCG.
TumCP↓, EGCG analogs resulted in inhibition of cell proliferation, up-regulation of the cyclin-dependent kinase inhibitor p21, down-regulation of mTOR pathway, and suppression of stem cell population in human breast cancer cells.
P21↑,
mTOR↓,
CSCs↓,
CD44↓, Both EGCG analogs 4 and 6 significantly decreased the CD44+high/CD24-low population in breast cancer cells
CD24↓,

679- EGCG,  5-FU,    Epigallocatechin-3-gallate targets cancer stem-like cells and enhances 5-fluorouracil chemosensitivity in colorectal cancer
- in-vitro, CRC, NA
NOTCH1↓, Furthermore, EGCG suppressed Notch1
BMI1↓,
SUZ12↓,
EZH2↓,
miR-34a↑,
miR-200c↑,
miR-145↑,
CSCs↓, (EGCG), an active catechin present in green tea, has been shown to suppress CSC growth in various cancers

678- EGCG,    Cancer Prevention with Green Tea and Its Principal Constituent, EGCG: from Early Investigations to Current Focus on Human Cancer Stem Cells
other↑, Delayed cancer onset, Prevention of colorectal adenoma recurrence
TumMeta↓,
YMcells↑, from 0.43 kPa to 2.53 kPa, about 6.2-fold
CSCs↓,

4680- EGCG,    The Potential of Epigallocatechin Gallate in Targeting Cancer Stem Cells: A Comprehensive Review
- Review, Var, NA
CSCs↓, major bioactive green tea polyphenol (-)-epigallocatechin gallate (EGCG) has been fruitful in downgrading cancer stemness signaling and CSC biomarkers in cancer progression.
EMT↓, Cancer stemness is intricately related to epithelial-mesenchymal transition (EMT), metastasis and therapy resistance, and EGCG has been evidenced to regress all these CSC-related effects
TumMeta↓,
RadioS↑, By inhibiting CSC characteristics EGCG has also been evidenced to sensitize the tumor cells to radiotherapy and chemotherapy.
ChemoSen↑,
BioAv↓, concern about its bioavailability, stability and efficacy against spheroids raised from parental cells. Therefore, novel nano formulations of EGCG and adjuvant therapy of EGCG with other phytochemicals or drugs or small molecules may have a better pr

4682- EGCG,    Human cancer stem cells are a target for cancer prevention using (−)-epigallocatechin gallate
- Review, Var, NA
CSCs↓, EGCG inhibits the transcription and translation of genes encoding stemness markers, indicating that EGCG generally inhibits the self-renewal of CSCs.
EMT↓, EGCG inhibits the expression of the epithelial-mesenchymal transition phenotypes of human CSCs.
ChemoSen↑, Green tea prevents human cancer, and the combination of EGCG and anticancer drugs confers cancer treatment with tissue-agnostic efficacy.
CD133↓, CD133, CD44, ALDH1A1, Nanog, Oct4
CD44↓,
ALDH1A1↓,
Nanog↓,
OCT4↓,
TumCP↓, These results show that EGCG inhibits proliferation and induces apoptosis of lung CSCs
Apoptosis↑,
p‑GSK‐3β↓, EGCG (0–100 μM) inhibited the phosphorylation of glycogen synthase kinase 3β (GSK3β) at Ser 9, which significantly increases the expression of GSK3β, and decreases the expression of β-catenin and its downstream target gene c-Myc.
GSK‐3β↑,
β-catenin/ZEB1↓,
cMyc↓,
XIAP↓, EGCG (30–60 μM) inhibits the expression of X-linked inhibitor of apoptosis protein (XIAP), Bcl2, and survivin as well as that of the EMT markers vimentin, Slug, Snail, and nuclear β-catenin.
Bcl-2↓,
survivin↓,
Vim↓,
Slug↓,
Snail↓,

4683- EGCG,    Epigallocatechin-3-gallate inhibits self-renewal ability of lung cancer stem-like cells through inhibition of CLOCK
- in-vitro, Lung, A549 - in-vitro, Lung, H1299 - in-vivo, Lung, A549
CSCs↓, it was demonstrated that EGCG suppressed the CSC-like characteristics of lung cancer cells by targeting CLOCK.
CD133↓, EGCG also decreased the ratio of CD133+ cells
CLOCK↓, The Wnt/β-catenin pathway was notably inactivated by the knockdown of CLOCK in A549 and H1299 sphere cells.
Wnt↓, Wnt/β-catenin signaling is blocked by the knockdown of CLOCK in lung CSCs
β-catenin/ZEB1↓,
CD44↓, EGCG decreased CD133, CD44, Sox2, Nanog, and Oct4 protein expression levels by targeting CLOCK
SOX2↓,
Nanog↓,
OCT4↓,

4684- EGCG,    EGCG inhibits CSC-like properties through targeting miR-485/CD44 axis in A549-cisplatin resistant cells
- in-vivo, NSCLC, A549
miR-485↑, (EGCG), a green tea polyphenol which has been identified as an effective anticancer compound was able to increase miR-485 expression dose-dependently in A549/CDDP cells.
CSCs↓, in vivo experiments were employed to confirm that EGCG restrained CSC-like characteristics by increasing miR-485 and decreasing CD44 expression.
CD44↓,

4685- EGCG,    Epigallocathechin gallate, polyphenol present in green tea, inhibits stem-like characteristics and epithelial-mesenchymal transition in nasopharyngeal cancer cell lines
- in-vitro, NPC, TW01 - in-vitro, NPC, TW06
CSCs↓, EGCG potently inhibited sphere formation and can eliminate the stem cell characteristics of NPC and inhibit the epithelial-mesenchymal transition (EMT) signatures.
EMT↓,
TumCMig↓, Inhibition on NPC sphere-derived cell colony formation, migration, and invasion by EGCG
TumCI↓,
OCT4↓, EGCG inhibited the expression of Klf-4 and Oct-4 in sphere-derived cells.
Snail↓, EGCG significantly inhibited the levels of Snail, Vimentin and increased E-Cadherin expression in a dose-dependent manner
Vim↓,
E-cadherin↓,
HSP70/HSPA5↓, EGCG suppresses the expression of HSP70 and HSP90, and exhibits anti-tumor activity in vitro and in vivo
HSP90↓,
AntiTum↓,

4664- GEN,  CUR,  RES,  EGCG,  SFN  Targeting cancer stem cells by nutraceuticals for cancer therapy
- Review, Var, NA
CSCs↓, we will describe the some natural chemopreventive agents that target CSCs in a variety of human malignancies, including soy isoflavone, curcumin, resveratrol, tea polyphenols, sulforaphane, quercetin, indole-3-carbinol, 3,3′-diindolylmethane, withafe
other↝, Because chemotherapy and radiotherapy cannot effectively remove CSCs
eff↑, Curcumin and EGCG combination attenuated the CD44+ cell population via inhibition of pSTAT3 and retaining the crosstalk between STAT3 and NF-κB in breast cancer cells [233]
CD44↓,
p‑STAT3↓,


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

Results for Effect on Cancer/Diseased Cells:
ALDH1A1↓,1,   AMPK↑,1,   AntiTum↓,1,   Apoptosis↑,2,   Bcl-2↓,1,   BioAv↓,1,   BMI1↓,1,   CD133↓,3,   CD24↓,1,   CD44↓,6,   ChemoSen↑,2,   CLOCK↓,1,   cMyc↓,1,   CSCs↓,11,   E-cadherin↓,1,   eff↑,1,   EMT↓,3,   EZH2↓,1,   GSK‐3β↑,1,   p‑GSK‐3β↓,1,   HSP70/HSPA5↓,1,   HSP90↓,1,   miR-145↑,1,   miR-200c↑,1,   miR-34a↑,1,   miR-485↑,1,   mTOR↓,1,   Nanog↓,2,   NF-kB↓,1,   NOTCH1↓,1,   OCT4↓,3,   other↑,1,   other↝,1,   P21↑,1,   RadioS↑,1,   Slug↓,1,   Snail↓,2,   SOX2↓,1,   p‑STAT3↓,2,   survivin↓,1,   SUZ12↓,1,   TumCI↓,2,   TumCMig↓,1,   TumCP↓,3,   TumMeta↓,2,   Vim↓,2,   Wnt↓,2,   XIAP↓,1,   YMcells↑,1,   β-catenin/ZEB1↓,3,  
Total Targets: 50

Results for Effect on Normal Cells:

Total Targets: 0

Scientific Paper Hit Count for: CSCs, Cancer Stem Cells
11 EGCG (Epigallocatechin Gallate)
2 Curcumin
1 5-fluorouracil
1 Genistein (soy isoflavone)
1 Resveratrol
1 Sulforaphane (mainly Broccoli)
Filter Conditions: Pro/AntiFlg:%  IllCat:%  CanType:%  Cells:%  prod#:73  Target#:795  State#:%  Dir#:%
  wNotes=on  sortOrder:rid,rpid

 

Home Page