Protein Kinase CK2 Controls CD8⁺ T Cell Effector and Memory Function during Infection.

Area of Science:

• Immunology
• Cell Biology
• Biochemistry

Background:

• Protein kinase CK2 (CK2) is a serine/threonine kinase vital for cellular processes.
• CK2 influences cancer progression and immune cell development.
• The role of CK2 in CD8+ T cell function remained unexplored.

Purpose of the Study:

• To investigate the role of CK2 in mouse CD8+ T cell activation, metabolism, and function.
• To determine if CK2α deficiency impacts T cell responses in vitro and in vivo.

Main Methods:

• Assessed CK2 protein levels and activity in activated mouse CD8+ T cells.
• Utilized CK2α-deficient mice to study T cell responses.
• Analyzed T cell activation, proliferation, and metabolic reprogramming via AKT/mTOR pathway.
• Evaluated CD8+ T cell responses in a mouse model of Listeria monocytogenes infection.

Main Results:

• CK2 protein levels and kinase activity increase upon mouse CD8+ T cell activation.
• CK2α deficiency impairs CD8+ T cell activation and proliferation.
• CK2α regulates CD8+ T cell metabolic reprogramming through the AKT/mTOR pathway.
• CK2α is essential for CD8+ T cell expansion, maintenance, and effector function during Listeria infection.

Conclusions:

• CK2α is a key regulator of mouse CD8+ T cell activation and proliferation.
• CK2α plays a critical role in CD8+ T cell metabolic reprogramming.
• CK2α is indispensable for effective primary and memory CD8+ T cell responses in vivo.