Stimulating the Antitumor Immune Response Using Immunocytokines: A Preclinical and Clinical Overview

Area of Science:

• Immunology and Cancer Therapy
• Biotechnology and Protein Engineering

Background:

• Cytokines are potent immune modulators and a cornerstone of immunotherapy, but their clinical application in cancer is hampered by poor pharmacokinetics and adverse effects.
• Immunocytokines (ICKs) represent an innovative strategy to enhance cytokine delivery to the tumor microenvironment, leveraging immunoglobulin scaffolds for improved stability and specificity.

Purpose of the Study:

• To review the development and therapeutic potential of immunocytokines (ICKs) utilizing key cytokines (IL-2, TNFα, IL-10, IL-12, IL-15, IL-21, IFNγ, GM-CSF, IFNα) in cancer therapy.
• To analyze the immunomodulatory effects of ICKs based on their technological design and compare them with naked cytokines.

Main Methods:

• Comprehensive review of existing literature on immunocytokines (ICKs) and their application in cancer therapy.
• Focus on ICKs engineered with specific cytokines and their associated immunoglobulin-based scaffolds.
• Analysis of pharmacological effects and immunomodulatory properties of various ICK designs.

Main Results:

• Reviewed ICKs incorporate cytokines like IL-2, TNFα, IL-10, IL-12, IL-15, IL-21, IFNγ, GM-CSF, and IFNα, demonstrating potential in preclinical and clinical cancer studies.
• The technological design of ICKs significantly influences their immunomodulatory effects and tumor-targeting capabilities.
• Promising results from ongoing clinical trials highlight the therapeutic potential of ICKs.

Conclusions:

• Immunocytokines (ICKs) offer a promising strategy to overcome the limitations of conventional cytokine immunotherapy for cancer.
• Continued advancements in targeting technologies, including cytokine/linker engineering and multispecific antibody design, are expected to further improve ICK efficacy.
• Future developments in ICK design hold significant potential for enhancing tumor targeting and immunostimulatory properties in cancer treatment.