From:  Overcoming barriers to the implementation of interleukin-12-based strategies in cancer immunotherapy: translational challenges, clinical integration, and public health implications

 Therapeutic strategies involving IL-12 in cancer immunotherapy

StrategyKey featuresMeritsLimitationsKey references
MonotherapyRecombinant IL-12 or plasmid-based IL-12, often through intratumoral injection-Potent activation of NK and T cells
-Induces IFN-γ
-Simple administration
-Severe systemic toxicity
-Narrow therapeutic window
-Lack of tumor specificity, off-target effects
[17, 39]
Combination therapyIL-12 with chemotherapy, radiotherapy, or immune checkpoint inhibitors-Synergistic antitumor effects
-Can overcome resistance
-Modulates tumor microenvironment
-Increased risk of systemic toxicity (mainly due to IFN-γ)
-Complex dosing and management
[62]
Vector-based approachViral vectors, nanoparticles, or cell based delivery-Localized sustained IL-12 expression
-Reduced systemic toxicity
-Enhanced immune activation
-Vector immunogenicity
-Risk of insertional
-Variable transfection efficiency
[39, 63]
Targeted deliveryTumor-localized expression, gene therapy, oncolytic virus, immunocytokines-Improved tumor specificity
-Reduced off-target toxicity
-Enhanced pharmacokinetics
-Incomplete tumor penetration
-Potential immunogenicity of fusion protein
-Off-tissue binding
[63]

IL-12: interleukin-12; NK: natural killer; IFN-γ: interferon-gamma