Silver-NanoParticles / SOD 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)


SOD, superoxide dismutase: Click to Expand ⟱
Source:
Type:
SOD, or superoxide dismutase, is an important antioxidant enzyme that plays a crucial role in protecting cells from oxidative stress. It catalyzes the dismutation of superoxide radicals into oxygen and hydrogen peroxide.
SOD Isoforms: There are three main isoforms of SOD:
SOD1 (cytosolic): Often found to be overexpressed in certain tumors, which may help cancer cells survive in oxidative environments.
SOD2 (mitochondrial): Plays a critical role in protecting mitochondria from oxidative damage. Its expression can be upregulated in some cancers, contributing to tumor growth and resistance to therapy.
SOD3 (extracellular): Its role in cancer is less well understood, but it may have implications in the tumor microenvironment and metastasis.
The expression levels of SOD can serve as a prognostic indicator in some cancers. For example, high levels of SOD expression have been associated with poor prognosis in certain types of tumors, potentially due to their role in promoting tumor cell survival and resistance to therapies.
Scientific Papers found: Click to Expand⟱
4558- AgNPs,    Role of Oxidative and Nitro-Oxidative Damage in Silver Nanoparticles Cytotoxic Effect against Human Pancreatic Ductal Adenocarcinoma Cells
- in-vitro, PC, PANC1
ROS↑, selectivity↑, NO↑, SOD↓, GPx4↓, Catalase↓, TumCCA↑, MMP↓,
2205- AgNPs,    Potential protective efficacy of biogenic silver nanoparticles synthesised from earthworm extract in a septic mice model
- in-vivo, Nor, NA
*Dose↝, *eff↑, *RenoP↑, *antiOx↑, *MDA↓, *NO↓, *hepatoP↑, *toxicity↝, *GSH↑, *SOD↑, *GSTs↑, *Catalase↑,
2207- AgNPs,  TQ,    Protective effects of Nigella sativa L. seeds aqueous extract-based silver nanoparticles on sepsis-induced damages in rats
- in-vivo, Nor, NA
*eff↑, *RenoP↑, *hepatoP↑, *MDA↓, *SOD↑, *GSH↑, *TNF-α↓, *IL1β↓,
2836- AgNPs,  Gluc,    Glucose capped silver nanoparticles induce cell cycle arrest in HeLa cells
- in-vitro, Cerv, HeLa
eff↝, TumCCA↑, eff↑, eff↑, ROS↑, GSH↓, SOD↓, lipid-P↑, LDH↑,
398- AgNPs,    Silver nanoparticles induced testicular damage targeting NQO1 and APE1 dysregulation, apoptosis via Bax/Bcl-2 pathway, fibrosis via TGF-β/α-SMA upregulation in rats
- in-vivo, Testi, NA
Bcl-2↓, Casp3↑, GSH↓, MDA↑, NO↑, H2O2↑, SOD↓,
402- AgNPs,  MF,    Anticancer and antibacterial potentials induced post short-term exposure to electromagnetic field and silver nanoparticles and related pathological and genetic alterations: in vitro study
- in-vitro, BC, MCF-7
P53↑, iNOS↑, NF-kB↑, Bcl-2↓, miR-125b↓, ROS↑, SOD↑,
4385- AgNPs,    Hepatoprotective effect of engineered silver nanoparticles coated bioactive compounds against diethylnitrosamine induced hepatocarcinogenesis in experimental mice
- in-vitro, Liver, NA
hepatoP↑, *AST↓, *ALAT↓, *Catalase↑, *GPx↑, *GSTA1↑, *SOD↑,
335- AgNPs,  PDT,    Biogenic Silver Nanoparticles for Targeted Cancer Therapy and Enhancing Photodynamic Therapy
- Review, NA, NA
ROS↑, GSH↓, GPx↑, Catalase↓, SOD↓, p38↑, BAX↑, Bcl-2↓,
324- AgNPs,  CPT,    Silver Nanoparticles Potentiates Cytotoxicity and Apoptotic Potential of Camptothecin in Human Cervical Cancer Cells
- in-vitro, Cerv, HeLa
ROS↑, Casp3↑, Casp9↑, Casp6↑, GSH↓, SOD↓, GPx↓, MMP↓, P53↑, P21↑, Cyt‑c↑, BID↑, BAX↑, Bcl-2↓, Bcl-xL↓, Akt↓, Raf↓, ERK↓, MAP2K1/MEK1↓, JNK↑, p38↑,
376- AgNPs,    Antitumor activity of colloidal silver on MCF-7 human breast cancer cells
- in-vitro, BC, MCF-7
Apoptosis↑, LDH↓, SOD↑, DNAdam↑,
356- AgNPs,  MF,    Anticancer and antibacterial potentials induced post short-term exposure to electromagnetic field and silver nanoparticles and related pathological and genetic alterations: in vitro study
- in-vitro, BC, MCF-7 - in-vitro, Bladder, HTB-22
Apoptosis↑, P53↑, iNOS↑, NF-kB↑, Bcl-2↓, ROS↑, SOD↑, TumCCA↑, eff↑, Catalase↑, other↑,
323- Sal,  AgNPs,    Combination of salinomycin and silver nanoparticles enhances apoptosis and autophagy in human ovarian cancer cells: an effective anticancer therapy
- in-vitro, BC, MDA-MB-231 - in-vitro, Ovarian, A2780S
TumCD↑, LDH↓, MDA↑, SOD↓, ROS↑, GSH↓, Catalase↓, MMP↓, P53↑, P21↑, BAX↑, Bcl-2↓, Casp3↑, Casp9↑, Apoptosis↑, TumAuto↑,
4604- Se,  AgNPs,  Chit,    The ameliorative effect of selenium-loaded chitosan nanoparticles against silver nanoparticles-induced ovarian toxicity in female albino rats
- in-vivo, Nor, NA
*Dose↝, *GSH↑, *SOD↑, *toxicity↓,
4440- SeNPs,  AgNPs,    Selenium, silver, and gold nanoparticles: Emerging strategies for hepatic oxidative stress and inflammation reduction
- Review, NA, NA
*hepatoP↑, *antiOx↑, *Inflam↓, *ROS↓, *SOD↑, *GPx↑, *lipid-P↓,
4601- SeNPs,  AgNPs,    Antioxidant and hepatoprotective role of selenium against silver nanoparticles
- in-vivo, Nor, NA
*TAC↑, *CRP↓, *AST↓, *ALAT↓, *toxicity↓, *GSH↑, *SOD↑, *Catalase↑, *hepatoP↑,

Showing Research Papers: 1 to 15 of 15

* indicates research on normal cells as opposed to diseased cells
Total Research Paper Matches: 15

Pathway results for Effect on Cancer / Diseased Cells:


Redox & Oxidative Stress ⓘ

Catalase↓, 3,   Catalase↑, 1,   GPx↓, 1,   GPx↑, 1,   GPx4↓, 1,   GSH↓, 5,   H2O2↑, 1,   lipid-P↑, 1,   MDA↑, 2,   ROS↑, 7,   SOD↓, 6,   SOD↑, 3,  

Mitochondria & Bioenergetics ⓘ

MMP↓, 3,   Raf↓, 1,  

Core Metabolism/Glycolysis ⓘ

LDH↓, 2,   LDH↑, 1,  

Cell Death ⓘ

Akt↓, 1,   Apoptosis↑, 3,   BAX↑, 3,   Bcl-2↓, 6,   Bcl-xL↓, 1,   BID↑, 1,   Casp3↑, 3,   Casp6↑, 1,   Casp9↑, 2,   Cyt‑c↑, 1,   iNOS↑, 2,   JNK↑, 1,   p38↑, 2,   TumCD↑, 1,  

Transcription & Epigenetics ⓘ

other↑, 1,  

Autophagy & Lysosomes ⓘ

TumAuto↑, 1,  

DNA Damage & Repair ⓘ

DNAdam↑, 1,   P53↑, 4,  

Cell Cycle & Senescence ⓘ

P21↑, 2,   TumCCA↑, 3,  

Proliferation, Differentiation & Cell State ⓘ

ERK↓, 1,   MAP2K1/MEK1↓, 1,   miR-125b↓, 1,  

Angiogenesis & Vasculature ⓘ

NO↑, 2,  

Immune & Inflammatory Signaling ⓘ

NF-kB↑, 2,  

Drug Metabolism & Resistance ⓘ

eff↑, 3,   eff↝, 1,   selectivity↑, 1,  

Clinical Biomarkers ⓘ

LDH↓, 2,   LDH↑, 1,  

Functional Outcomes ⓘ

hepatoP↑, 1,  
Total Targets: 47

Pathway results for Effect on Normal Cells:


Redox & Oxidative Stress ⓘ

antiOx↑, 2,   Catalase↑, 3,   GPx↑, 2,   GSH↑, 4,   GSTA1↑, 1,   GSTs↑, 1,   lipid-P↓, 1,   MDA↓, 2,   ROS↓, 1,   SOD↑, 6,   TAC↑, 1,  

Core Metabolism/Glycolysis ⓘ

ALAT↓, 2,  

Angiogenesis & Vasculature ⓘ

NO↓, 1,  

Immune & Inflammatory Signaling ⓘ

CRP↓, 1,   IL1β↓, 1,   Inflam↓, 1,   TNF-α↓, 1,  

Drug Metabolism & Resistance ⓘ

Dose↝, 2,   eff↑, 2,  

Clinical Biomarkers ⓘ

ALAT↓, 2,   AST↓, 2,   CRP↓, 1,  

Functional Outcomes ⓘ

hepatoP↑, 4,   RenoP↑, 2,   toxicity↓, 2,   toxicity↝, 1,  
Total Targets: 26

Scientific Paper Hit Count for: SOD, superoxide dismutase
15 Silver-NanoParticles
2 Magnetic Fields
2 Selenium NanoParticles
1 Thymoquinone
1 Glucose
1 Photodynamic Therapy
1 Camptothecin
1 salinomycin
1 Selenium
1 chitosan
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#:298  State#:%  Dir#:%
  wNotes=0  sortOrder:rid,rpid

 

Home Page