T cells and costimulation in cancer

Area of Science:

• Immunology
• Cancer Biology
• Molecular Signaling

Background:

• T cell activation relies on T cell receptor (TCR) signaling and coreceptor interactions.
• Coreceptors, such as B7 and tumor necrosis factor (TNF) family members, provide costimulatory or coinhibitory signals.
• This balance is crucial for regulating immune responses, promoting protection or preventing excessive inflammation.

Purpose of the Study:

• To review the functions of key T cell cosignaling pathways.
• To discuss the clinical applications of targeting T cell cosignaling in cancer therapy.

Main Methods:

• Literature review of T cell cosignaling mechanisms.
• Analysis of experimental and clinical data on cosignaling blockade.

Main Results:

• In the tumor microenvironment, coinhibitory signals often dominate, impairing T cell responses.
• Targeting coinhibitory molecules is a promising strategy in cancer immunotherapy.

Conclusions:

• Understanding T cell cosignaling axes is vital for developing effective cancer treatments.
• Modulating T cell cosignaling holds significant therapeutic potential for enhancing anti-tumor immunity.