Advancements in understanding the regulatory mechanism of B-cell immune activation associated with adenotonsillar hypertrophy

Abstract

B cells play a crucial role in recognizing external antigens through their surface B cell receptor (BCR), essential for generating protective antibodies and immune memory. Regulation of B cell immune activation is closely linked to various upper respiratory tract diseases. Adenoid hypertrophy (ATH), a common childhood condition, is characterized by lymphoid follicular hyperplasia, yet its exact mechanisms remain elusive. This review consolidates research on BCR trophic signaling that sustains B cell viability in resting state. It clarifies the regulatory mechanisms governing B cell immune activation and the establishment of rapid, effective immune memory, with a specific focus on early molecular activation events and the pivotal role of mIgG-tail in memory antibody responses. Dysregulation of B cell activation processes can disrupt immune balance, potentially precipitating disease. This synthesis explores the connection between regulation of B cell activation and ATH pathogenesis, examining the potential impacts of signaling pathway dysregulation or mutations on ATH. The review aims to enhance understanding of the disease mechanisms underlying ATH, with the goal of identifying new diagnostic and therapeutic targets for this condition.

Keywords

• adenotonsillar hypertrophy
• b cell
• b cell activation
• b cell receptor
• immunological synapse