Manganese boosts natural killer cell function via cGAS-STING mediated UTX expression

Area of Science:

• Immunology
• Cell Biology
• Biochemistry

Background:

• Natural killer (NK) cells are critical for innate and adaptive immunity.
• The impact of manganese (Mn2+) on NK cell function, particularly its cGAS-STING pathway activation, was previously unclear.

Purpose of the Study:

• To investigate the role of manganese (Mn2+) in NK cell activation and function.
• To elucidate the mechanisms by which Mn2+ influences NK cell-mediated immunity and antitumor activity.

Main Methods:

• Assessing NK cell cytotoxicity and cytokine secretion.
• Analyzing the activation of the cyclic GMP-AMP (cGAS)-stimulator of interferon genes (STING) pathway in NK cells.
• Evaluating the impact of Mn2+ on CD8+ T cell activation and subsequent antitumor responses.

Main Results:

• Mn2+ directly enhances NK cell cytotoxicity and cytokine production.
• Mn2+ activates intrinsic cGAS-STING signaling in NK cells, increasing ubiquitously transcribed tetratricopeptide repeat on chromosome X (UTX) expression.
• Activated NK cells promote CD8+ T cell responses, leading to improved antitumor activity.

Conclusions:

• Mn2+ is a potent activator of NK cells through the cGAS-STING pathway.
• Mn2+ enhances NK cell responsiveness and antitumor immunity.
• Mn2+ represents a promising therapeutic agent for NK cell-based cancer immunotherapy.