CD8⁺ Tissue-Resident Memory T Cells in Health and Disease.

Area of Science:

• Immunology
• Cellular Biology
• Molecular Medicine

Background:

• CD8+ tissue-resident memory T (T_RM) cells are key regulators of local immune responses within tissues.
• These cells exhibit dual functions, contributing to host defense and driving autoimmune pathology.
• Mechanisms controlling T_RM cell function are increasingly understood, offering therapeutic targets.

Purpose of the Study:

• To review the current knowledge on CD8+ T_RM cell biology, including their origin, regulation, and function.
• To explore the role of T_RM cells in cancer and autoimmune diseases.
• To discuss immunotherapies targeting T_RM cells and their clinical implications.

Main Methods:

• Literature review of preclinical and translational human research.
• Analysis of molecular and cellular mechanisms governing T_RM cell activity.
• Exploration of tissue immune networks and T_RM cell metabolism.

Main Results:

• CD8+ T_RM cells are essential for tissue-specific immunity, pathogen defense, and malignancy surveillance.
• Dysfunctional T_RM cells contribute to autoimmune disorders.
• T_RM cell characteristics correlate with clinical outcomes in various cancers.

Conclusions:

• A comprehensive understanding of T_RM cell biology is vital for developing targeted therapies.
• Modulating T_RM cell development, residency, and metabolism holds promise for treating immune-related diseases.
• Targeting T_RM cells via immunotherapies like checkpoint inhibitors shows therapeutic potential.