doxorubicin / PCNA Cancer Research Results

doxoR, doxorubicin: Click to Expand ⟱
Features:
Doxorubicin, (brand name Adriamycin) is a chemotherapy medication used to treat breast cancer, bladder cancer, Kaposi's sarcoma, lymphoma, and acute lymphocytic leukemia. Often used together with other chemotherapy agents. Given by injection into a vein.
Doxorubicin is an anthracycline chemotherapy whose core anticancer activity is driven by DNA intercalation and topoisomerase II poisoning (DNA double-strand break stress), with additional contributions from redox cycling/iron-linked oxidative injury in some contexts. Its major clinical limitations are myelosuppression and cumulative dose–dependent cardiomyopathy, plus severe tissue injury if extravasated (leaks outside the vein).
-Cumulative cardiomyopathy risk is real and dose-dependent; labels note higher risk at higher cumulative doses (often cited around >550 mg/m², with lower limits in higher-risk patients).
-Mechanism split: tumor kill is primarily Topo II + DNA damage, while cardiotoxicity is strongly linked to TOP2β/mitochondrial pathways (redox/iron biology remains discussed, but not the only story).
-Administration hazard: extravasation can cause severe local injury;

Rank Pathway / Axis Cancer / Tumor Context Normal Tissue Context TSF Primary Effect Notes / Interpretation
1 Topoisomerase II poisoning (DNA double-strand break stress) Topo II–DNA cleavage complexes ↑ → DNA breaks ↑ → apoptosis/senescence ↑ (context) Also affects normal proliferating tissues (marrow, mucosa) P, R Core cytotoxic mechanism Primary anticancer mechanism: stabilization of Topo II–DNA cleavage complexes blocks repair and drives lethal DNA damage responses.
2 DNA intercalation → replication/transcription disruption DNA/RNA synthesis ↓; replication stress ↑ Off-target in normal dividing cells P, R Replication/transcription blockade Intercalation contributes to replication fork stress and complements Topo II poisoning.
3 Redox cycling / iron-associated oxidative injury (context-dependent) ROS / oxidative damage ↑ (reported; model-dependent) Oxidative injury risk in sensitive tissues (esp. heart) ↑ P, R, G Stress amplification Often described as semiquinone redox cycling and iron interactions; the relative importance vs Topo II varies by tissue/model.
4 Cardiotoxicity axis (TOP2β + mitochondrial injury; cumulative-dose dependent) — Risk of cardiomyopathy/heart failure ↑ with cumulative exposure R, G Major dose-limiting toxicity Clinically important boxed-warning toxicity; risk increases with cumulative dose (labels cite higher risk above ~550 mg/m²; higher-risk patients often use lower limits).
5 Myelosuppression (bone marrow progenitors) — Neutropenia/anemia/thrombocytopenia risk ↑ R, G Dose-limiting toxicity Expected on-target effect in rapidly dividing marrow cells; infection risk increases when neutrophils are low.
6 p53 / DNA-damage response programs DDR signaling ↑; p53 pathway engagement ↑ (context) DDR activation in normal tissues contributes to toxicity R, G Cell fate commitment Downstream of DNA breaks: checkpoint activation, apoptosis, senescence, or mitotic catastrophe depending on genotype and dose.
7 Immunogenic cell death signals (DAMP exposure; context-dependent) Potential ICD features ↑ (reported in some systems) — G Immune engagement (conditional) Anthracyclines are often discussed as capable of immunogenic cell death in certain settings; not universal across regimens.
8 Extravasation tissue injury (local) — Severe local tissue damage risk if IV leakage occurs P, R Administration hazard Boxed warning emphasizes severe tissue injury with extravasation; requires strict IV administration controls.
9 Secondary malignancy risk (therapy-related AML/MDS; exposure-dependent) — Rare long-term risk signal ↑ — Late toxicity constraint Listed in boxed warnings/labels as a potential late effect, especially with combination regimens.
10 Cardioprotection strategy (dexrazoxane; selected settings) — Cardiotoxicity risk ↓ (when used appropriately) R, G Risk mitigation Dexrazoxane is used to reduce anthracycline cardiotoxicity; mechanistic literature includes TOP2β-linked protection and other hypotheses.

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

  • P: 0–30 min (direct DNA/Topo interactions begin rapidly)
  • R: 30 min–3 hr (acute DNA-damage response + stress signaling)
  • G: >3 hr (gene programs, apoptosis/senescence, phenotype-level outcomes)
PCNA, Proliferating Cell Nuclear Antigen: Click to Expand ⟱
Source:
Type:
Proliferating Cell Nuclear Antigen (PCNA) is a protein that plays a crucial role in DNA replication and repair. It acts as a processivity factor for DNA polymerase, helping to increase the efficiency of DNA synthesis. PCNA is also involved in various cellular processes, including cell cycle regulation, DNA damage response, and chromatin remodeling.
PCNA is often overexpressed in many types of tumors. This overexpression is associated with increased cell proliferation, which is a hallmark of cancer. The elevated levels of PCNA can serve as a biomarker for tumor growth and progression.
PCNA is called the “ringmaster of the genome” : it regulates the cell cycle and participates in DNA synthesis. PCNA is widely used as a cell proliferation marker in both healthy and malignant tissues.
Scientific Papers found: Click to Expand⟱
7680- iod,  doxoR,    Iodine and doxorubicin, a good combination for mammary cancer treatment: antineoplastic adjuvancy, chemoresistance inhibition, and cardioprotection
- vitro+vivo, BC, NA
antiNeop↑, antiOx↑, Dose↝, TumVol↓, PCNA↓, Weight↑, cardioP↑, ChemoSen↑,

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(tgid=1) ⓘ

antiOx↑, 1,  

DNA Damage & Repair(tgid=10) ⓘ

PCNA↓, 1,  

Drug Metabolism & Resistance(tgid=21) ⓘ

ChemoSen↑, 1,   Dose↝, 1,  

Functional Outcomes(tgid=23) ⓘ

antiNeop↑, 1,   cardioP↑, 1,   TumVol↓, 1,   Weight↑, 1,  
Total Targets: 8

Pathway results for Effect on Normal Cells:


Total Targets: 0

Scientific Paper Hit Count for: PCNA, Proliferating Cell Nuclear Antigen
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#:179  Target#:489  State#:%  Dir#:1
  wNotes=0  sortOrder:rid,rpid

 

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