Tissue-Resident ILC2s Across Organs: Heterogeneity, Niche Crosstalk, and Shared Regulatory Circuits

Area of Science:

• Immunology
• Cell Biology
• Physiology

Background:

• Type 2 innate lymphoid cells (ILC2s) are recognized for their role in allergic inflammation.
• ILC2s are increasingly found in peripheral tissues like the lung, fat, intestine, and skin.
• Emerging research indicates ILC2 presence and function in non-traditional tissues such as the pancreas, uterus, and meninges.

Purpose of the Study:

• To review the physiological functions of ILC2s across multiple tissues.
• To highlight the dual role of ILC2s in type 2 immunity and homeostasis.
• To synthesize recent findings on ILC2 regulation by alarmins, neuropeptides, and environmental factors.

Main Methods:

• Literature review of recent studies on ILC2 function.
• Analysis of ILC2 roles in both immune and non-immune tissues.
• Synthesis of data on ILC2 regulation and physiological contributions.

Main Results:

• ILC2s are present in diverse tissues, including lung, fat, intestine, skin, pancreas, uterus, and meninges.
• These cells contribute significantly to type 2 immune responses.
• ILC2s also play essential roles in maintaining normal biological homeostasis in various organs.

Conclusions:

• ILC2s are critical players in both allergic inflammation and the maintenance of physiological homeostasis.
• Their functions extend beyond type 2 immunity to encompass normal biological processes in multiple tissues.
• Further research into ILC2s will illuminate their broad impact on health and disease.