Citrullination in tumor immunity and therapy

Area of Science:

• Biochemistry
• Immunology
• Oncology

Background:

• Peptidyl arginine deiminases (PADs) catalyze protein citrullination, a posttranslational modification.
• This modification alters protein charge, affecting folding, stability, conformation, and function.
• PAD2 and PAD4 are key enzymes that can enter the nucleus to citrullinate proteins.

Purpose of the Study:

• To review the role of PAD2- and PAD4-mediated citrullination in immune cells within the tumor microenvironment.
• To discuss how citrullination influences immune cell function and anti-tumor immunity.
• To explore the therapeutic potential of targeting citrullination in cancer immunotherapy.

Main Methods:

• Literature review focusing on PAD2 and PAD4 functions.
• Analysis of studies investigating protein citrullination in immune cells.
• Exploration of existing and potential cancer immunotherapy strategies targeting citrullination.

Main Results:

• Citrullination by PAD2 and PAD4 significantly impacts immune cell subsets within the tumor microenvironment.
• Protein citrullination regulates key aspects of immune cell function and overall tumor immunity.
• Evidence suggests that targeting citrullination pathways can modulate anti-tumor immune responses.

Conclusions:

• PAD2 and PAD4-mediated citrullination play a critical role in regulating immune responses within the tumor microenvironment.
• Targeting protein citrullination presents a promising avenue for developing novel cancer immunotherapies.
• Further research into PAD-mediated citrullination could unlock new therapeutic strategies for cancer treatment.