Myricetin / BACE/β-secretase Cancer Research Results

Myr, Myricetin: Click to Expand ⟱
Features:
Myricetin (MYR; 3,3′,4′,5,5′,7-hexahydroxyflavone) is a dietary flavonol polyphenol abundant in berries, tea, red wine, and some medicinal plants. Its dominant biology is redox-active modulation with context-dependent pro-oxidant capacity, ranking conceptually as:
(1) ROS modulation (scavenging at low dose; pro-oxidant at higher dose or with metal redox cycling),
(2) PI3K/Akt/mTOR and MAPK pathway inhibition,
(3) NF-κB suppression and inflammatory signaling control, and
(4) mitochondrial apoptosis induction (caspase activation, ΔΨm disruption).
Bioavailability is limited by low aqueous solubility and rapid conjugation (glucuronidation/sulfation); reported human plasma levels after dietary exposure are typically sub-micromolar (<1 µM), while many in-vitro cancer studies use 10–100 µM, often exceeding realistic systemic exposure. Clinical evidence remains preclinical-dominant; no robust RCT-grade anticancer efficacy established. Redox duality implies potential chemo-sensitization in oxidative tumors but also theoretical protection of normal tissue.

-Possible inhibitory effects on mammalian TrxRs (thioredoxin reductase)

Myricetin (MYR) — Cancer-Relevant Pathway Effects

Rank Pathway / Axis Cancer Cells (↑/↓/↔ + qualifiers) Normal Cells (↑/↓/↔ + qualifiers) TSF Primary Effect Notes / Interpretation
1 ROS Modulation ↑ ROS (high conc., pro-oxidant); ↓ ROS (low conc.) ↓ ROS (protective; dose-dependent) P–R Redox stress induction or buffering Metal-chelating flavonol; can shift to pro-oxidant under tumor oxidative stress, enabling apoptosis.
2 PI3K/Akt/mTOR ↓ Akt phosphorylation (model-dependent) ↔ / mild inhibition R–G Anti-proliferative signaling Common in breast, colon, and prostate cell models; often ≥10 µM required.
3 MAPK (ERK/JNK/p38) ↓ ERK; ↑ JNK/p38 (stress-activated; context) ↔ / adaptive stress response R Pro-apoptotic signaling shift Promotes apoptotic cascades via stress kinase activation.
4 NF-κB ↓ NF-κB activation ↓ NF-κB (anti-inflammatory) R–G Anti-inflammatory modulation May reduce tumor-promoting inflammation.
5 Mitochondrial Apoptosis (Caspase / ΔΨm) ↑ Bax; ↓ Bcl-2; ↑ caspase-3 ↔ / protective at low dose R–G Intrinsic apoptosis activation Frequently observed in leukemia and solid tumor models at supra-physiologic doses.
6 NRF2 Axis ↔ / mild ↑ (context-dependent) ↑ NRF2 (cytoprotection) R–G Adaptive antioxidant response Less potent NRF2 activator than electrophilic isothiocyanates.
7 Ca²⁺ Signaling ↑ intracellular Ca²⁺ (mitochondrial stress; model-dependent) ↔ R Apoptosis facilitation Reported in some hepatoma and leukemia models.
8 Ferroptosis ↔ / potentially ↓ (iron-chelating) ↔ — Lipid peroxidation modulation Chelation may counter ferroptosis unless combined with pro-oxidant triggers.
9 Clinical Translation Constraint Low oral bioavailability; plasma <1 µM; most anticancer studies use 10–100 µM — PK limitation Conjugation and rapid metabolism limit systemic tumor exposure.
TSF Legend: P: 0–30 min   R: 30 min–3 hr   G: >3 hr
BACE/β-secretase, β-site APP-cleaving enzyme: Click to Expand ⟱
Source:
Type:
BACE stands for β-site APP-cleaving enzyme, also known as β-secretase. It plays a central role in the pathogenesis of Alzheimer’s disease by initiating the production of amyloid-β (Aβ) peptides, the primary components of amyloid plaques found in the brains of individuals with AD.
-inhibiting BACE1 reduces Aβ production.

BACE1 - Beta-Site APP Cleaving Enzyme 1 / β-Secretase 1

Abbreviation: BACE1, β-secretase, β-secretase 1

Type: Aspartyl protease / amyloidogenic APP-processing enzyme

Function: BACE1 is a membrane-associated aspartyl protease that performs the initial β-secretase cleavage of amyloid precursor protein (APP). This cleavage generates soluble APPβ and the membrane-bound C99 fragment, which is subsequently cleaved by γ-secretase to produce amyloid-β peptides including Aβ40 and Aβ42.

Alzheimer's Disease: ↑ Increased BACE1 expression or enzymatic activity promotes amyloidogenic APP processing and increases amyloid-β production. Elevated BACE1 activity has been reported in Alzheimer's disease and contributes to Aβ accumulation, plaque formation, synaptic dysfunction, and disease progression. BACE1 inhibition reduces Aβ production, although clinical BACE1 inhibitors have been limited by adverse effects related to the enzyme's normal physiological functions.
Scientific Papers found: Click to Expand⟱
7828- Myr,  MBS,    Neuroprotective Potential of Mung Bean (Vigna radiata L.) Polyphenols in Alzheimer's Disease: A Review
- Review, AD, NA
*BBB↑, *neuroP↑, *cognitive↑, *Aβ↓, *ADAM10↑, *BACE/β-secretase↝, *IronCh↑, *Iron↓, *AChE↓, *ROS↓,

Showing Research Papers: 1 to 1 of 1

* indicates research on normal cells as opposed to diseased cells
Total Research Paper Matches: 1

Pathway results for Effect on Cancer / Diseased Cells:


Total Targets: 0

Pathway results for Effect on Normal Cells:


Redox & Oxidative Stress(tgid=1) ⓘ

Iron↓, 1,   ROS↓, 1,  

Metal & Cofactor Biology(tgid=2) ⓘ

IronCh↑, 1,  

Barriers & Transport(tgid=15) ⓘ

BBB↑, 1,  

Synaptic & Neurotransmission(tgid=18) ⓘ

AChE↓, 1,   ADAM10↑, 1,  

Protein Aggregation(tgid=19) ⓘ

Aβ↓, 1,   BACE/β-secretase↝, 1,  

Functional Outcomes(tgid=23) ⓘ

cognitive↑, 1,   neuroP↑, 1,  
Total Targets: 10

Scientific Paper Hit Count for: BACE/β-secretase, β-site APP-cleaving enzyme
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#:127  Target#:1349  State#:%  Dir#:%
  wNotes=0  sortOrder:rid,rpid

 

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