5-fluorouracil / mTOR Cancer Research Results

5-FU, 5-fluorouracil: Click to Expand ⟱
Features:
5-FU is a chemotherapy medication used to treat various types of cancer, including colorectal, breast, stomach, and pancreatic cancer. It belongs to a class of drugs known as antimetabolites, which work by interfering with the growth and replication of cancer cells.
Mechanisms:
- functionally irreversibly inhibits Thymidylate Synthase (TS), thereby depleting the deoxythymidine monophosphate (dTMP) pool required for DNA synthesis. The resulting “thymineless death” prevents DNA replication and repair, particularly affecting rapidly proliferating tumor cells.

5-FU is a cornerstone in chemotherapy with a dual mechanism of action—primarily inhibiting thymidylate synthase (leading to disruption of DNA synthesis) and interfering with RNA processing by misincorporation. Its metabolism via activation (OPRT) and degradation (DPD) plays a crucial role in both its effectiveness and toxicity. Clinically, 5-FU is extensively used in treating a variety of cancers, most notably colorectal cancer, and remains a mainstay in multi-agent chemotherapeutic regimens due to its proven efficacy across diverse cancer types.

5-FU is one of the most common chemotherapeutic agents worldwide, particularly noted in gastrointestinal (GI) cancers.

Rank Pathway / Axis Cancer / Tumor Context Normal Tissue Context TSF Primary Effect Notes / Interpretation
1 Thymidylate synthase (TS) inhibition → dTMP depletion dTMP ↓ → DNA synthesis ↓ → replication stress ↑ Also affects normal proliferating tissues (marrow, GI mucosa) P, R Core cytotoxic mechanism 5-FU is converted to FdUMP, which forms a ternary complex with TS and folate, blocking thymidylate production (“thymineless death”).
2 RNA misincorporation (FUTP incorporation) RNA processing/translation defects ↑ Contributes to mucositis and systemic toxicity P, R Transcription/translation disruption RNA effects are a major contributor to cytotoxicity, particularly with bolus dosing.
3 DNA misincorporation (FdUTP incorporation) DNA damage signaling ↑; apoptosis ↑ (context) DDR activation in normal tissues contributes to toxicity R, G Genome instability Misincorporation triggers mismatch repair and DNA damage responses.
4 S-phase specificity (cell-cycle dependence) Greater killing in actively cycling/S-phase cells Bone marrow & GI epithelium vulnerability ↑ R, G Cell-cycle–linked cytotoxicity Antimetabolite activity is strongest in proliferating cells.
5 Folate modulation (leucovorin synergy) TS inhibition ↑ when combined with leucovorin — R Mechanism amplification Leucovorin stabilizes the FdUMP–TS–folate complex, enhancing cytotoxicity.
6 Myelosuppression — Neutropenia/anemia risk ↑ R, G Dose-limiting toxicity Expected on-target effect in rapidly dividing marrow progenitors.
7 Gastrointestinal toxicity (mucositis/diarrhea) — GI epithelial injury ↑ R, G Dose-limiting toxicity Reflects RNA/DNA effects in rapidly renewing GI mucosa.
8 Cardiotoxicity (vasospasm; rare cardiomyopathy) — Chest pain/ischemia risk ↑ (rare but important) R Serious adverse effect Coronary vasospasm is the most recognized mechanism; monitoring required in symptomatic patients.
9 DPD metabolism (DPYD enzyme) Severe toxicity risk ↑ if DPD deficient — — Pharmacogenetic constraint Dihydropyrimidine dehydrogenase (DPD) metabolizes 5-FU; deficiency can cause life-threatening toxicity. Pre-treatment DPYD testing is increasingly recommended.
10 Infusion vs bolus pharmacodynamics Continuous infusion → more TS-driven DNA effect Bolus → more RNA-mediated toxicity P, R, G Dosing-dependent mechanism balance Administration schedule alters relative DNA vs RNA contribution and toxicity profile.

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

  • P: 0–30 min (metabolic activation begins rapidly)
  • R: 30 min–3 hr (TS inhibition, RNA/DNA incorporation, DDR activation)
  • G: >3 hr (cell-cycle arrest, apoptosis, tissue-level toxicities)
mTOR, mammalian target of rapamycin: Click to Expand ⟱
Source: HalifaxProj (inhibit)
Type:
mTOR (mechanistic target of rapamycin) is a central regulator of cell growth, proliferation, metabolism, and survival. It is a serine/threonine kinase that integrates signals from nutrients, growth factors, and cellular energy status.
mTOR promotes protein synthesis and cell growth by activating downstream targets such as S6 kinase and 4E-BP1. In cancer, this pathway can become hyperactivated, leading to uncontrolled cell proliferation.

mTor Inhibitors:
-rapamycin (Sirolimus): classic natural product mTOR inhibitor
-Curcumin
-Resveratrol
-Epigallocatechin Gallate (EGCG)
-Honokiol
Scientific Papers found: Click to Expand⟱
4774- 5-FU,  TQ,  CoQ10,    Exploring potential additive effects of 5-fluorouracil, thymoquinone, and coenzyme Q10 triple therapy on colon cancer cells in relation to glycolysis and redox status modulation
- in-vitro, CRC, NA
AntiCan↑, All treatments resulted in anticancer effects depicted by cell cycle arrest and apoptosis, with TQ demonstrating greater efficacy than CQ10, both with and without 5-FU.
TumCCA↑,
Apoptosis↑,
eff↑, with TQ demonstrating greater efficacy than CQ10, both with and without 5-FU.
Bcl-2↓, However, 5-FU/TQ/CQ10 triple therapy exhibited the most potent pro-apoptotic activity in all cell lines, portrayed by the lowest levels of oncogenes (CCND1, CCND3, BCL2, and survivin)
survivin↓,
P21↑, and the highest upregulation of tumour suppressors (p21, p27, BAX, Cytochrome-C, and Cas- pase-3).
p27/CDKN1B↑,
BAX↑,
Cyt‑c↑,
Casp3↑,
PI3K↓, The triple therapy also showed the strongest suppression of the PI3K/AKT/mTOR/HIF1α pathway, with a concurrent increase in its endogenous inhibitors (PTEN and AMPKα) in all cell lines used.
Akt↓,
mTOR↓,
Hif1a↓,
PTEN↑,
AMPKα↑,
PDH↑, triple therapy favoured glucose oxidation by upregulating PDH, while decreasing LDHA and PDHK1 enzymes.
LDHA↓,
antiOx↓, most significant decline in antioxidant levels and the highest increases in oxidative stress markers
ROS↑,
AntiCan↑, This study is the first to demonstrate the superior anticancer effects of TQ compared to CQ10, with and without 5-FU, in CRC treatment.

6391- Eug,  BCP,  5-FU,    Exploring Mechanism of Actions for Eugenol and Beta-Caryophyllene to Combat Colorectal Cancer Chemotherapy Using Network Pharmacology
- in-vitro, CRC, HCT116
Synergy↑, MTT assay revealed in-vitro cytotoxic effects of EUG, BCP, and 5-FU, with a noteworthy reduction in IC50 values observed when combining the compounds, indicating synergistic effects
ChemoSen↑,
HSP90↓, Molecular docking studies indicate that EUG, BCP, and 5-FU effectively inhibit the core target protein HSP90AA1
Dose↝, We aimed to lower the IC50 value of 5-FU (6 to 192.19 µM) by combining it with the three concentrations of EUG and BCP (50 µM, 100 µM, and 200 µM) to reduce its side effects
TumAuto↑, promote autophagy and inhibit apoptosis through PI3K/Akt/mTOR pathway and JNK/P38 pathway, which are key pathways in epithelial to mesenchymal transition inhibition.
Apoptosis↑,
PI3K↓,
Akt↓,
mTOR↓,
JNK↓,
p38↓,
EMT↓,

4535- MAG,  5-FU,    Magnolol and 5-fluorouracil synergy inhibition of metastasis of cervical cancer cells by targeting PI3K/AKT/mTOR and EMT pathways
- in-vitro, Cerv, NA
ChemoSen↑, this study suggests that 5-FU combined with magnolol exerts a synergistic anti-cervical cancer effect by regulating the PI3K/AKT/mTOR and epithelial-mesenchymal transition (EMT) signaling pathways.
TumCP↓, magnolol strongly inhibited cervical cancer cell proliferation,
vinculin↓, down-regulating the expression of α-actinin, tensin-2 and vinculin
TumCA↓, magnolol enhanced inhibitory effect of 5-FU on the cell adhesion, migration and invasion.
TumCMig↓,
TumCI↓,
p‑Akt↓, phosphorylation of AKT and PI3K and the expression of mTOR were strongly inhibited by the combination of 5-FU and magnolol.
p‑PI3K↓,
mTOR↓,
E-cadherin↑, expression of E-cadherin and β-catenin was upregulated
β-catenin/ZEB1↑,
Snail↓, expression of Snail, Slug and vimentin was down-regulated by the 5-FU together with magnolol.
Slug↓,

1678- PBG,  5-FU,  sericin,    In vitro and in vivo anti-colorectal cancer effect of the newly synthesized sericin/propolis/fluorouracil nanoplatform through modulation of PI3K/AKT/mTOR pathway
- in-vitro, CRC, Caco-2 - in-vivo, NA, NA
PI3K↓, mechanism of action of the prepared nanoformula revealed that it acts through the inhibition of the PI3K/AKT/mTOR signaling pathway and consequently inhibiting cancerous cells proliferation.
Akt↓,
mTOR↓,
TumCP↓,
Bcl-2↓, downregulated BCL2 (B-cell lymphoma 2) and activated BAX, Caspase 9 and Caspase 3 expression
BAX↑,
Casp3↑,
Casp9↑,
ROS↓, prepared nanoformula decreased the ROS (Reactive Oxygen Species) production in vivo owing to PI3K/AKT/mTOR pathway inhibition and FOXO-1 (Forkhead Box O1) activation
FOXO1↑,
*toxicity∅, LD50 of the prepared nanoformula reached 1 mg/Kg upon oral administration.
eff↑, It is well known that propolis and sericin inhibit PI3K/AKT and ERK pathway


Showing Research Papers: 1 to 4 of 4

* indicates research on normal cells as opposed to diseased cells
Total Research Paper Matches: 4

Pathway results for Effect on Cancer / Diseased Cells:


Redox & Oxidative Stress(tgid=1) ⓘ

antiOx↓, 1,   ROS↓, 1,   ROS↑, 1,  

Mitochondria & Bioenergetics(tgid=3) ⓘ

PDH↑, 1,  

Core Metabolism/Glycolysis(tgid=4) ⓘ

LDHA↓, 1,  

Cell Death(tgid=5) ⓘ

Apoptosis↑, 2,   BAX↑, 2,   Bcl-2↓, 2,   Casp3↑, 2,   Casp9↑, 1,   Cyt‑c↑, 1,   p38↓, 1,   survivin↓, 1,  

Kinase & Signal Transduction(tgid=6) ⓘ

Akt↓, 3,   p‑Akt↓, 1,   AMPKα↑, 1,   JNK↓, 1,   mTOR↓, 4,   PI3K↓, 3,   p‑PI3K↓, 1,   PTEN↑, 1,  

Transcription & Epigenetics(tgid=7) ⓘ

FOXO1↑, 1,  

Protein Folding & ER Stress(tgid=8) ⓘ

HSP90↓, 1,  

Autophagy & Lysosomes(tgid=9) ⓘ

TumAuto↑, 1,  

Cell Cycle & Senescence(tgid=11) ⓘ

P21↑, 1,   p27/CDKN1B↑, 1,   TumCCA↑, 1,  

Proliferation, Differentiation & Cell State(tgid=12) ⓘ

TumCP↓, 2,  

Migration(tgid=13) ⓘ

E-cadherin↑, 1,   EMT↓, 1,   Slug↓, 1,   Snail↓, 1,   TumCA↓, 1,   TumCI↓, 1,   TumCMig↓, 1,   vinculin↓, 1,   β-catenin/ZEB1↑, 1,  

Angiogenesis & Vasculature(tgid=14) ⓘ

Hif1a↓, 1,  

Drug Metabolism & Resistance(tgid=21) ⓘ

ChemoSen↑, 2,   Dose↝, 1,   eff↑, 2,   Synergy↑, 1,  

Functional Outcomes(tgid=23) ⓘ

AntiCan↑, 2,  
Total Targets: 43

Pathway results for Effect on Normal Cells:


Functional Outcomes(tgid=23) ⓘ

toxicity∅, 1,  
Total Targets: 1

Scientific Paper Hit Count for: mTOR, mammalian target of rapamycin
4 5-fluorouracil
1 Thymoquinone
1 Coenzyme Q10
1 Eugenol
1 Beta-Caryophyllene
1 Magnolol
1 Propolis -bee glue
1 sericin
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#:191  Target#:209  State#:%  Dir#:1
  wNotes=on  sortOrder:rid,rpid

 

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