Silver-NanoParticles / ER Stress Cancer Research Results

AgNPs, Silver-NanoParticles: Click to Expand ⟱
Features:
Silver NanoParticles (AgNPs)
Summary:
1.Smaller sizes are generally more bioactive due to increased surface area and enhanced tumor accumulation via the enhanced permeability and retention (EPR) effect.
2.Two relevant forms: particulate silver (AgNPs) and ionic silver (Ag⁺). There is debate regarding oral use, as Ag⁺ can precipitate as AgCl in gastric acid, reducing bioavailability; AgNPs may partially avoid this via particulate uptake and intracellular Ag⁺ release. Gastric pH may influence this equilibrium.
3. Dose example 80kg person: 1.12-2mg/day, which can be calculated based on ppm and volume taken (see below) target < 10ppm and 120mL per day (30ppm and 1L per day caused argyria 30mg/day ) (Case Report: 9‐15 ppm@120mL, i.e. 1.1mg/L to 1.8mg/L per day)
Likely 10ppm --> 10mg/L, hence if take 100mL, then 1mg/day? (for Cancer)
The current Rfd for oral silver exposure is 5 ug/kg/d with a critical dose estimated at 14 ug/kg/d for the average person.
Seems like the Cancer target range is 14ug/kg/day to 25ug/kg/day. 80Kg example: 1.12mg to 2mg “1.4µg/kg body weight. If I would have 70kg, I would want to use 100µg/day. However, for fighting active disease, I would tend to explore higher daily dose, as I think this may be too low.”
These values reflect experimental or anecdotal contexts and are not established safe or therapeutic doses.
4. Antioxidants such as NAC can counteract AgNP cytotoxicity by restoring glutathione pools and suppressing ROS-mediated mitochondrial damage.
5. In vitro studies commonly show ROS elevation in both cancer and normal cells; however, in vivo, superior antioxidant, NRF2, and repair capacity in normal tissues may confer selectivity.
6. Pathways/mechanisms of action/:
-” intracellular ROS was increased...reduction in levels of glutathione (GSH)”
- Normal-cell selectivity is partly mediated by NRF2-dependent antioxidant and detoxification responses.
- AgNPs impair mitochondrial electron transport, increasing electron leak and amplifying ROS upstream of ΔΨm collapse.
-AgNPs inhibit VEGF-driven endothelial signaling and permeability (anti-angiogenic effect)
-”upregulation of proapoptotic genes (p53, p21, Bax, and caspases) and downregulation of antiapoptotic genes (Bcl-2)”
-” upregulation of AMPK and downregulation of mTOR, MMP-9, BCL-2, and α-SMA”
-”p53 is a key player...proapoptotic genes p53 and Bax were significantly increased... noticeable reduction in Bcl-2 transcript levels”
-” p53 participates directly in the intrinsic apoptosis pathway by regulating the mitochondrial outer membrane permeabilization”
- “Proapoptotic markers (BAX/BCL-XL, cleaved poly(ADP-ribose) polymerase, p53, p21, and caspases 3, 8 and 9) increased.”
-”The antiapoptotic markers, AKT and NF-kB, decreased in AgNP-treated cells.”

Chronic accumulation and long-term systemic effects remain insufficiently characterized.

Silver NanoParticles and Magnetic Fields
Summary:
1. “exposure to PMF increased the ability of AgNPs uptake”
2. 6x improvement from AgNPs alone

could glucose capping of SilverNPs work as trojan horse?

Sodium selenite might protect against toxicity of AgNPs in normal cells.

-uncoated AgNPs can degrade the gut microbiome. PVP, citrate, green-synthesized, chitosan coating, may reduce the effect.
Similar oxidative considerations may apply to selenium compounds, though mechanisms differ.
co-ingestion with food (higher pH) favors reduction and lower Ag+ levels.
-action mechanisms of AgNPs: the release of silver ions (Ag+), generation of reactive oxygen species (ROS), destruction of membrane structure.

AgNP anticancer effects come from three overlapping mechanisms:
-Nanoparticle–cell interaction (uptake, membrane effects)
-Intracellular ROS generation
-Controlled Ag⁺ release inside cancer cells

Comparison adding Citrate Capping
| Property              | Uncapped AgNPs | Citrate-capped AgNPs |
| --------------------- | -------------- | -------------------- |
| Stability             | Poor           | Excellent            |
| Free Ag⁺              | High           | Low                  |
| Normal cell toxicity  | Higher         | Lower                |
| Cancer selectivity    | Lower          | **Higher**           |
| Mechanism specificity | Crude          | **Targeted**         |
| Storage behavior      | Degrades       | Stable               |

Rank Pathway / Target Axis Cancer Cells Normal Cells Primary Effect Notes / Cancer Relevance Ref
1 Oxidative stress / ROS generation ↑ ROS (sustained) ↑ transient ROS → ↓ net ROS after adaptation Upstream cytotoxic trigger AgNP exposure commonly elevates ROS in cancer cells, initiating downstream stress-death programs (ref)
2 Thiol buffering (GSH pool) ↓ GSH (depletion) ↔ or transient ↓ with recovery Loss of redox buffering Colon cancer model: AgNPs induce oxidative cell damage through inhibition/depletion of reduced glutathione with downstream mitochondrial apoptosis (ref)
3 Mitochondrial ETC / respiration ↓ ETC efficiency; ↑ electron leak ↔ mild inhibition with recovery Bioenergetic destabilization ETC impairment amplifies ROS, precedes ΔΨm loss, and contributes to ATP collapse in cancer cells
4 Mitochondrial integrity (ΔΨm / MMP) ↓ ΔΨm ↔ largely preserved Mitochondrial dysfunction Breast cancer model: AgNP exposure dissipates mitochondrial membrane potential during cytotoxic progression (ref)
5 Intrinsic apoptosis (caspase cascade) ↑ caspase-dependent apoptosis ↔ minimal activation Programmed cell death Colon cancer model: “silver-based nanoparticles” induce apoptosis mediated through p53 (apoptosis direction shown) (ref)
6 Genotoxic stress / DNA damage ↑ DNA damage ↑ damage at high dose with efficient repair Checkpoint/death signaling Study documents AgNP-mediated DNA damage; susceptibility increases with impaired DNA repair capacity (ref)
7 ER stress / UPR (CHOP-dependent) ↑ ER stress → apoptosis ↑ adaptive UPR (no CHOP) Proteotoxic stress signaling Breast cancer cells: AgNPs induce “irremediable” ER stress leading to UPR-dependent apoptosis (ref)
8 Autophagy program ↑ autophagy (protective) ↑ adaptive autophagy Stress adaptation AgNPs induce autophagy in cancer cells; inhibiting autophagy enhances AgNP anticancer killing (ref)
9 Autophagic flux / lysosomal function ↓ flux (lysosomal defect) ↔ preserved flux Autophagic failure AgNP-induced lysosomal dysfunction drives autophagic flux defects (LC3-II accumulation) (ref)
10 NRF2 antioxidant response ↔ insufficient activation ↑ NRF2 activation Adaptive redox defense NRF2 activation in normal cells restores GSH and antioxidant enzymes, limiting toxicity
11 Stress MAPK (p38) / checkpoint signaling ↑ p38 → arrest/apoptosis ↑ transient p38 → recovery Stress signaling Jurkat T-cell model shows p38 MAPK activation with DNA damage and apoptosis (ref)
12 Angiogenesis / invasion (VEGF, NF-κB-linked) ↓ angiogenesis / ↓ invasion ↔ minimal effect Anti-angiogenic / anti-invasive AgNPs inhibit VEGF-induced permeability and invasion in tumor models (ref)


ER Stress, endoplasmic reticulum (ER) stress signaling pathway: Click to Expand ⟱
Source:
Type:
Protein expression of ATF, GRP78, and GADD153 which is a hall marker of ER stress.
The endoplasmic reticulum (ER) stress signaling pathway plays a crucial role in maintaining cellular homeostasis and responding to various stressors, including those encountered in cancer. When cells experience stress, such as the accumulation of misfolded proteins, they activate a series of signaling pathways collectively known as the unfolded protein response (UPR). The UPR aims to restore normal function by enhancing the protein-folding capacity of the ER, degrading misfolded proteins, and, if the stress is unresolved, triggering apoptosis.
The activation of ER stress pathways can contribute to resistance against chemotherapy and targeted therapies. Cancer cells may utilize the UPR to survive treatment-induced stress, making it challenging to achieve effective therapeutic outcomes.

-ER stress-associated proteins include: phosphorylation of PERK, eIF2α, ATF4, CHOP and cleaved-caspase 12
Scientific Papers found: Click to Expand⟱
4563- AgNPs,  Rad,    Silver nanoparticles enhance neutron radiation sensitivity in cancer cells: An in vitro study
- in-vitro, BC, MCF-7 - in-vitro, Ovarian, SKOV3 - in-vitro, GBM, U87MG - in-vitro, Melanoma, A431
RadioS↑, ROS↑, TumCCA↑, Apoptosis↑, ER Stress↑,
4559- AgNPs,    Anticancer activity of biogenerated silver nanoparticles: an integrated proteomic investigation
- in-vitro, BC, SkBr3 - in-vitro, CRC, HT-29 - in-vitro, CRC, HCT116 - in-vitro, Colon, Caco-2
MMP2↓, MMP9↓, ROS↑, TumAuto↑, Apoptosis↑, ER Stress↑,
5146- AgNPs,    Silver Nanoparticle-Induced Autophagic-Lysosomal Disruption and NLRP3-Inflammasome Activation in HepG2 Cells Is Size-Dependent
- in-vitro, Liver, HepG2
TumAuto↑, EPR↑, LC3B↑, CHOP↑, ER Stress↑, NLRP3↑, Casp1↓,
5145- AgNPs,    Silver nanoparticles induce irremediable endoplasmic reticulum stress leading to unfolded protein response dependent apoptosis in breast cancer cells
- in-vitro, BC, MCF-7 - in-vitro, BC, T47D
Bacteria↓, Apoptosis↑, ER Stress↑, UPR↑, PERK↑, IRE1↑, ATF6↑, ATF4↑, CHOP↑, Casp9↑, Casp7↑, Mcl-1↓, XIAP↓, PARP↝, selectivity↑,
1908- AgNPs,    Exposure to Silver Nanoparticles Inhibits Selenoprotein Synthesis and the Activity of Thioredoxin Reductase
- in-vitro, Lung, A549
TrxR↓, TrxR1↓, ROS↑, ER Stress↑, TumCP↓, selenoP↓,
2288- AgNPs,    Silver Nanoparticle-Mediated Cellular Responses in Various Cell Lines: An in Vitro Model
- Review, Var, NA
*ROS↑, Akt↓, ERK↓, DNAdam↑, Ca+2↑, ROS↑, MMP↓, Cyt‑c↑, TumCCA↑, DNAdam↑, Apoptosis↑, P53↑, p‑ERK↑, ER Stress↑, cl‑ATF6↑, GRP78/BiP↑, CHOP↑, UPR↑,
347- AgNPs,    The Role of Silver Nanoparticles in the Diagnosis and Treatment of Cancer: Are There Any Perspectives for the Future?
- Review, NA, NA
ROS↑, Apoptosis↑, ER Stress↑,
306- AgNPs,    Cancer Therapy by Silver Nanoparticles: Fiction or Reality?
- Analysis, NA, NA
EPR↝, ROS↑, IL1↑, IL8↑, ER Stress↑, MMP9↑, MMP↓, Cyt‑c↑, Apoptosis↑, Hif1a↑, BBB↑, GutMicro↝, eff↑, eff↑, RadioS↑,
316- AgNPs,    Endoplasmic reticulum stress: major player in size-dependent inhibition of P-glycoprotein by silver nanoparticles in multidrug-resistant breast cancer cells
- in-vitro, BC, MCF-7
GRP78/BiP↑, ER Stress↑, ROS↑, mtDam↑,
319- AgNPs,    Endoplasmic reticulum stress signaling is involved in silver nanoparticles-induced apoptosis
Apoptosis↑, Ca+2↑, ER Stress↑, PERK↑, IRE1↑, cl‑ATF6↑,
320- AgNPs,    Silver nanoparticles induce endoplasmatic reticulum stress response in zebrafish
- vitro+vivo, NA, HUH7
ROS↑, ER Stress↑, TNF-α↑,
354- AgNPs,    Silver nanoparticles induce SH-SY5Y cell apoptosis via endoplasmic reticulum- and mitochondrial pathways that lengthen endoplasmic reticulum-mitochondria contact sites and alter inositol-3-phosphate receptor function
- in-vitro, neuroblastoma, SH-SY5Y
TumCD↑, ER Stress↑, GRP78/BiP↑, p‑PERK↑, CHOP↑, Ca+2↑, XBP-1↑, p‑IRE1↑,
374- AgNPs,    Silver nanoparticles selectively treat triple‐negative breast cancer cells without affecting non‐malignant breast epithelial cells in vitro and in vivo
- in-vitro, BC, MCF-7 - in-vitro, BC, MDA-MB-231 - in-vivo, NA, NA
ER Stress↑, DNAdam↑, ROS↑, Apoptosis↑, GSH/GSSG↓, NADPH/NADP+↓, TumCG↓, UPR↑,

Showing Research Papers: 1 to 13 of 13

* indicates research on normal cells as opposed to diseased cells
Total Research Paper Matches: 13

Pathway results for Effect on Cancer / Diseased Cells:


Redox & Oxidative Stress ⓘ

GSH/GSSG↓, 1,   NADPH/NADP+↓, 1,   ROS↑, 9,   selenoP↓, 1,   TrxR↓, 1,   TrxR1↓, 1,  

Mitochondria & Bioenergetics ⓘ

MMP↓, 2,   mtDam↑, 1,   XIAP↓, 1,  

Cell Death ⓘ

Akt↓, 1,   Apoptosis↑, 8,   Casp1↓, 1,   Casp7↑, 1,   Casp9↑, 1,   Cyt‑c↑, 2,   Mcl-1↓, 1,   TumCD↑, 1,  

Protein Folding & ER Stress ⓘ

ATF6↑, 1,   cl‑ATF6↑, 2,   CHOP↑, 4,   ER Stress↑, 13,   GRP78/BiP↑, 3,   IRE1↑, 2,   p‑IRE1↑, 1,   PERK↑, 2,   p‑PERK↑, 1,   UPR↑, 3,   XBP-1↑, 1,  

Autophagy & Lysosomes ⓘ

LC3B↑, 1,   TumAuto↑, 2,  

DNA Damage & Repair ⓘ

DNAdam↑, 3,   P53↑, 1,   PARP↝, 1,  

Cell Cycle & Senescence ⓘ

TumCCA↑, 2,  

Proliferation, Differentiation & Cell State ⓘ

ERK↓, 1,   p‑ERK↑, 1,   TumCG↓, 1,  

Migration ⓘ

Ca+2↑, 3,   MMP2↓, 1,   MMP9↓, 1,   MMP9↑, 1,   TumCP↓, 1,  

Angiogenesis & Vasculature ⓘ

ATF4↑, 1,   EPR↑, 1,   EPR↝, 1,   Hif1a↑, 1,  

Barriers & Transport ⓘ

BBB↑, 1,  

Immune & Inflammatory Signaling ⓘ

IL1↑, 1,   IL8↑, 1,   TNF-α↑, 1,  

Protein Aggregation ⓘ

NLRP3↑, 1,  

Drug Metabolism & Resistance ⓘ

eff↑, 2,   RadioS↑, 2,   selectivity↑, 1,  

Clinical Biomarkers ⓘ

GutMicro↝, 1,  

Infection & Microbiome ⓘ

Bacteria↓, 1,  
Total Targets: 56

Pathway results for Effect on Normal Cells:


Redox & Oxidative Stress ⓘ

ROS↑, 1,  
Total Targets: 1

Scientific Paper Hit Count for: ER Stress, endoplasmic reticulum (ER) stress signaling pathway
13 Silver-NanoParticles
1 Radiotherapy/Radiation
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#:153  Target#:103  State#:%  Dir#:2
  wNotes=0  sortOrder:rid,rpid

 

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