VitK3,menadione / RNR Cancer Research Results

VitK3, VitK3,menadione: Click to Expand ⟱

Features:

Menadione (2-methyl-1,4-naphthoquinone, also termed vitamin K3)
Menadione-induced ROS generation is concentration-dependent and high concentrations trigger cell death.
Clinical trials conducted on patients with prostate cancer showed that ascorbic acid-menadione produced an immediate drop in tumor cell numbers through a mechanism named autoschizis.
Menadione (Vitamin K3) is a synthetic naphthoquinone compound. It is not used as a nutritional vitamin supplement in humans due to toxicity risk (particularly hemolysis and hepatotoxicity). Historically used in animal feed.

Mechanistically, menadione functions primarily as a redox-active quinone, capable of:
-Undergoing redox cycling
-Generating reactive oxygen species (ROS)
-Inducing oxidative stress
-Interacting with glutathione (GSH) systems
-Modulating mitochondrial function

It has been investigated in oncology research largely due to its pro-oxidant cytotoxic properties, not classical vitamin K–dependent clotting roles.

Rank	Pathway / Axis	Cancer / Tumor Context	Normal Tissue Context	TSF	Primary Effect	Notes / Interpretation
1	Redox cycling (quinone-mediated ROS generation)	ROS ↑; oxidative stress ↑; apoptosis ↑ (dose-dependent)	Oxidative injury risk ↑ (hemolysis, hepatotoxicity)	P, R	Primary cytotoxic mechanism	Menadione undergoes one-electron redox cycling, generating superoxide and hydrogen peroxide; not selective for tumor cells.
2	Glutathione (GSH) depletion	GSH ↓; redox buffering capacity ↓	Red cell vulnerability ↑	P, R	Redox destabilization	Conjugation and oxidative cycling consume GSH, amplifying oxidative stress.
3	Mitochondrial dysfunction	ΔΨm ↓; ATP ↓; apoptosis signaling ↑	Energy stress in normal cells possible	R, G	Mitochondria-mediated apoptosis	ROS and redox imbalance disrupt mitochondrial membrane potential.
4	DNA damage (oxidative)	DNA strand breaks ↑ (reported)	Genotoxic risk ↑	R, G	Genome instability	Often secondary to ROS accumulation rather than direct DNA intercalation.
5	Synergy with ascorbate (Vitamin C)	Redox cycling ↑; cytotoxicity ↑ (reported in vitro)	Systemic oxidative injury risk ↑	P, R	Redox amplification	Menadione can undergo redox cycling with ascorbate, increasing ROS production; largely preclinical data.
6	Topoisomerase interference (reported)	Topo inhibition (context-dependent)	↔	R	Secondary mechanism	Some studies report interference with topoisomerase activity, but this is not the dominant mechanism.
7	Hemolysis risk (G6PD vulnerability)	—	Red blood cell destruction risk ↑	R	Major toxicity constraint	Menadione can cause hemolytic anemia, especially in G6PD deficiency.
8	Hepatotoxicity	—	Liver injury risk ↑	G	Clinical toxicity constraint	Historical reason for discontinuation as a human supplement.
9	Vitamin K–dependent clotting pathway	Minimal physiologic role in humans	Not equivalent to K1/K2	—	Classification clarification	Menadione is a synthetic precursor; does not function identically to phylloquinone (K1) or menaquinones (K2).

Time-Scale Flag (TSF): P / R / G

P: 0–30 min (rapid redox cycling and ROS generation)
R: 30 min–3 hr (mitochondrial dysfunction, DNA damage signaling)
G: >3 hr (apoptosis, tissue-level toxicity outcomes)

RNR, Ribonucleotide Reductase: Click to Expand ⟱

Source:

Type: enzyme

RNR (Ribonucleotide Reductase) is an enzyme that plays a crucial role in the synthesis of DNA. It is responsible for converting ribonucleotides into deoxyribonucleotides, which are the building blocks of DNA.
In cancer, RNR is often overexpressed, which can contribute to the rapid growth and proliferation of cancer cells. This is because cancer cells require a constant supply of DNA building blocks to support their rapid division.

Research has shown that inhibiting RNR can be an effective way to slow down or stop the growth of cancer cells.

Scientific Papers found: Click to Expand⟱

635-

VitC,

VitK3,

The combination of ascorbate and menadione causes cancer cell death by oxidative stress and replicative stress

in-vitro,

NA,

RNR↓, GSH↓, Trx1↓, GPx↓, lipid-P↑, AIF↑, 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:

Redox & Oxidative Stress ⓘ

GPx↓, 1, GSH↓, 1, lipid-P↑, 1, ROS↑, 1, Trx1↓, 1,

Mitochondria & Bioenergetics ⓘ

AIF↑, 1,

Core Metabolism/Glycolysis ⓘ

RNR↓, 1,
Total Targets: 7

Pathway results for Effect on Normal Cells:

Total Targets: 0

Scientific Paper Hit Count for: RNR, Ribonucleotide Reductase

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