| Rank |
Pathway / Axis |
Cancer Cells |
Normal Cells |
TSF |
Primary Effect |
Notes / Interpretation |
| 1 |
Mevalonate pathway suppression |
HMGCR ↓ → MVA flux ↓ |
HMGCR ↓ (hepatic target) |
P/R |
Depletes sterols + isoprenoids upstream |
On-target mechanism; anticancer relevance rises in MVA-addicted tumors and when combined with strategies that prevent compensation. |
| 2 |
Protein prenylation stress |
Ras/Rho/Rac prenylation ↓ → signaling output ↓ |
Variable; typically tolerated at clinical doses |
R |
Disrupts membrane localization of key GTPases |
Central downstream effector of anticancer activity; impacts proliferation, migration, cytoskeletal dynamics, and survival programs. |
| 3 |
SREBP2 feedback and “restore-the-pathway” resistance |
SREBP2 ↑ (often) → HMGCR/MVA genes ↑ (adaptive) |
SREBP2 ↑ (homeostatic lipid control) |
G |
Adaptive rewiring that can blunt efficacy |
Common translational constraint: tumors may upregulate MVA pathway, increase uptake, or rewire metabolism to bypass blockade. |
| 4 |
Growth and survival signaling |
PI3K–AKT ↔/↓, MAPK ↔/↓ (model-dependent) |
Endothelial survival ↔/↑ (context-dependent) |
R/G |
Downshifts pro-survival signaling tone |
Often secondary to prenylation/lipid-raft disruption; direction depends on oncogenic wiring and dose. |
| 5 |
Migration, invasion, EMT |
EMT ↓, motility ↓ (often) |
Wound/repair migration ↔ |
G |
Anti-migratory / anti-invasive phenotype |
Mechanistically linked to Rho-family prenylation and cytoskeletal/ECM programs; may be clinically relevant in select settings. |
| 6 |
Inflammation and NF-κB-linked cytokine programs |
IL-6/IL-8/TNF-α ↓ (often) |
Vascular inflammation ↓ |
R/G |
Anti-inflammatory immunometabolic shift |
Pleiotropic statin effects; may affect tumor microenvironment and therapy tolerance, but tumor-immune direction can be context-dependent. |
| 7 |
ROS and mitochondrial stress |
ROS ↑ (sometimes; dose-dependent) |
Oxidative injury ↔/↓ in vascular contexts |
P/R |
Stress signaling that can promote apoptosis or sensitize to therapy |
Reported in subsets of models; not universally primary. Separate “cancer cell ROS ↑” from “vascular protective” pleiotropy. |
| 8 |
Cell death programs |
Apoptosis ↑; autophagy ↔/↑ (model-dependent) |
Generally cytoprotective at therapeutic dosing |
R/G |
Stress-induced cell fate shift |
Often downstream of prenylation deficit + metabolic stress; strong effects often require higher concentrations or combinations. |
| 9 |
Drug transport and resistance |
P-gp ↓ (reported); efflux ↔/↓ (context-dependent) |
Transporter effects ↔ |
R/G |
Potential bioenhancement / chemosensitization |
May contribute to combination effects, but clinical relevance is uncertain and interaction risk must be managed. |
| 10 |
Radiosensitization and chemosensitization |
RadioS ↑; ChemoSen ↑ (subset) |
Normal tissue injury ↔/↓ (some contexts) |
G |
Adjunct therapy leverage (context-dependent) |
Signals exist in preclinical and limited clinical/biomarker work; not a class-wide guarantee and may depend on tumor MVA reliance. |
| 11 |
Clinical Translation Constraint |
Free exposure may be below many in-vitro “kill” concentrations; adaptive SREBP2 feedback; tumor heterogeneity |
Myopathy/rhabdomyolysis risk ↑ with interacting drugs; hepatic enzyme elevations; pregnancy contraindication |
— |
Defines practical therapeutic window |
Major constraints: CYP3A4/transport interactions (e.g., strong inhibitors; grapefruit), muscle toxicity risk, and uncertain tumor delivery/on-target engagement at tolerated doses. |