Melatonin / Ki-67 Cancer Research Results

MEL, Melatonin: Click to Expand ⟱
Features:
Hormone in the body made by pineal gland.
• Melatonin is a potent antioxidant. It neutralizes reactive oxygen species (ROS) and reactive nitrogen species (RNS), which are involved in DNA damage and cancer progression.
• Melatonin has been shown to modulate apoptotic pathways by influencing mitochondrial permeability, cytochrome c release, and caspase activation.
• In several cancer cell models, melatonin appears to promote apoptosis in malignant cells while sparing normal cells.

The most well-known indolamines are serotonin and melatonin, both of which play significant roles in regulating mood, sleep, and overall mental well-being.

Melatonin doses (20 mg to even 40 mg per day), often given as an adjuvant treatment for cancer.
-The plasma half-life of melatonin is generally in the range of approximately 20 to 60 minutes
-It has been suggested that administering melatonin at the appropriate phase of the circadian cycle may enhance its anti-tumor activity and reduce the side effects of chemotherapy and radiation therapy.

Bio-availability: Oral melatonin has a low and variable bio-availability (often estimated between 3% and 33%), which means that only a fraction of the ingested dose reaches the bloodstream unchanged.

For proOxidant effect might need >10uM, which might be 100mg dose (assuming 10% bio-availability) Might also be required X10 levels?
-It remains unknown whether the pro-oxidant action exists in vivo. the vast majority of evidence indicates that melatonin is a potent antioxidant in vivo even at pharmacological concentrations.

Interactions:
-Melatonin could potentially add to the blood pressure–lowering properties of antihypertensive drugs.
-Patients using insulin should be monitored for changes in blood glucose levels.
-Melatonin might interact with drugs like warfarin, aspirin, or clopidogrel.(antiplatelet)


Melatonin Cancer Relevant Pathways
Rank Pathway / Axis Cancer Cells Normal Cells Label Primary Interpretation Notes
1 Circadian signaling (MT1 / MT2 receptors) ↓ proliferative circadian disruption ↑ circadian synchronization Driver Chronobiology normalization Melatonin restores circadian control; cancer cells lose growth advantages from circadian dysregulation
2 Reactive oxygen species (ROS) ↓ ROS (baseline); context-dependent ↑ stress signaling ↓ ROS (strong buffering) Driver Antioxidant dominance with signaling effects Melatonin is a potent direct and indirect antioxidant; cancer cells may still undergo stress-mediated growth inhibition
3 Mitochondrial function ↓ metabolic flexibility; ↑ apoptosis sensitivity ↑ mitochondrial efficiency Secondary Mitochondrial stabilization vs vulnerability Melatonin improves mitochondrial function in normal cells while limiting metabolic plasticity in cancer cells
4 Estrogen signaling (ERα modulation) ↓ estrogen-driven proliferation ↔ minimal Secondary Hormone-dependent growth suppression Particularly relevant in breast and hormone-responsive cancers
5 NF-κB signaling ↓ inflammatory / survival signaling ↓ inflammatory tone Secondary Anti-inflammatory modulation NF-κB suppression contributes to reduced tumor-promoting inflammation
6 Cell cycle regulation ↓ proliferation / ↑ arrest ↔ spared Phenotypic Cytostatic growth control Growth inhibition reflects upstream circadian and hormonal effects
7 Apoptosis sensitivity ↑ sensitivity to apoptosis (chemo/RT) ↓ apoptosis Phenotypic Therapy sensitization Melatonin enhances response to chemo- and radiotherapy while protecting normal tissue


Ki-67, Ki-67 protein: Click to Expand ⟱
Source:
Type: proliferation marker
A high Ki-67 proliferation index means many cells are dividing quickly and that the cancer is likely to grow and spread.
Markers of proliferation index (Ki-67)

• Ki-67 serves primarily as a proliferation marker: higher levels are generally indicative of aggressive disease and poorer outcomes across many cancer types.
• While Ki-67 itself is not considered a driver of tumorigenesis, its expression mirrors the high proliferative activity associated with protumoral behavior.
• It is widely used in clinical practice to aid in tumor grading, prognostication, and treatment planning.
Scientific Papers found: Click to Expand⟱
1351- And,  MEL,    Impact of Andrographolide and Melatonin Combinatorial Drug Therapy on Metastatic Colon Cancer Cells and Organoids
- in-vitro, CRC, T84 - in-vitro, CRC, COLO205 - in-vitro, CRC, HT-29 - in-vitro, CRC, DLD1
eff↑, Ki-67↓, Casp3↑, ER Stress↑, ROS↑, BAX↑, XBP-1↑, CHOP↑, eff↑,
5384- AsP,  MEL,    Synergistic Anticancer Effect of Melatonin and Ascorbyl Palmitate Nanoformulation: A Promising Combination for Cancer Therapy
- in-vivo, Var, NA
AntiCan↑, TumCG↓, Apoptosis↑, DNAdam↑, TumCCA↑, IL6↓, STAT3↓, TumCP↓, Ki-67↓, TumCI↓, TumMeta↓, MMP9↓, eff↑, *Catalase↑, *SOD↑, *GSH↑, *MDA↓, *NO↓, *antiOx↑, *hepatoP↑, *RenoP↑,

Showing Research Papers: 1 to 2 of 2

* indicates research on normal cells as opposed to diseased cells
Total Research Paper Matches: 2

Pathway results for Effect on Cancer / Diseased Cells:


Redox & Oxidative Stress ⓘ

ROS↑, 1,  

Cell Death ⓘ

Apoptosis↑, 1,   BAX↑, 1,   Casp3↑, 1,  

Protein Folding & ER Stress ⓘ

CHOP↑, 1,   ER Stress↑, 1,   XBP-1↑, 1,  

DNA Damage & Repair ⓘ

DNAdam↑, 1,  

Cell Cycle & Senescence ⓘ

TumCCA↑, 1,  

Proliferation, Differentiation & Cell State ⓘ

STAT3↓, 1,   TumCG↓, 1,  

Migration ⓘ

Ki-67↓, 2,   MMP9↓, 1,   TumCI↓, 1,   TumCP↓, 1,   TumMeta↓, 1,  

Immune & Inflammatory Signaling ⓘ

IL6↓, 1,  

Drug Metabolism & Resistance ⓘ

eff↑, 3,  

Clinical Biomarkers ⓘ

IL6↓, 1,   Ki-67↓, 2,  

Functional Outcomes ⓘ

AntiCan↑, 1,  
Total Targets: 21

Pathway results for Effect on Normal Cells:


Redox & Oxidative Stress ⓘ

antiOx↑, 1,   Catalase↑, 1,   GSH↑, 1,   MDA↓, 1,   SOD↑, 1,  

Angiogenesis & Vasculature ⓘ

NO↓, 1,  

Functional Outcomes ⓘ

hepatoP↑, 1,   RenoP↑, 1,  
Total Targets: 8

Scientific Paper Hit Count for: Ki-67, Ki-67 protein
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#:122  Target#:425  State#:%  Dir#:1
  wNotes=0  sortOrder:rid,rpid

 

Home Page