What is the primary function of antigen-presenting cells (APCs) at mucosal surfaces in allergic rhinitis?

What is the primary function of antigen-presenting cells (APCs) at mucosal surfaces in allergic rhinitis?

• A. To produce antibodies against allergens
• B. To present peptides from allergens to MHC-II
• C. To release histamines
• D. To induce apoptosis of eosinophils

Answer: (B)

The primary function of antigen-presenting cells (APCs) at mucosal surfaces in allergic rhinitis is to present peptides from allergens to MHC-II. APCs, such as dendritic cells and macrophages, play a crucial role in the immune response by capturing allergens that enter through mucosal surfaces and processing them into peptide fragments. These fragments are then loaded onto major histocompatibility complex class II (MHC-II) molecules, which are presented to CD4+ T helper cells. This interaction is essential for the activation of T cells, leading to a cascade of immune responses that culminate in the production of specific antibodies by B cells and the recruitment and activation of other immune cells, contributing to the allergic response. The presentation of allergenic peptides is a key step in shaping the adaptive immune response, particularly in the context of allergies, such as allergic rhinitis. The other options do not accurately describe the primary role of APCs in this context. While antibodies are produced later in the immune response, APCs themselves are not responsible for their production. Histamine release is associated with mast cells and basophils in response to allergens, but it is not a function of APCs. Inducing apoptosis of eosinophils is not a

The primary function of antigen-presenting cells (APCs) at mucosal surfaces in allergic rhinitis is to present peptides from allergens to MHC-II. APCs, such as dendritic cells and macrophages, play a crucial role in the immune response by capturing allergens that enter through mucosal surfaces and processing them into peptide fragments. These fragments are then loaded onto major histocompatibility complex class II (MHC-II) molecules, which are presented to CD4+ T helper cells.

This interaction is essential for the activation of T cells, leading to a cascade of immune responses that culminate in the production of specific antibodies by B cells and the recruitment and activation of other immune cells, contributing to the allergic response. The presentation of allergenic peptides is a key step in shaping the adaptive immune response, particularly in the context of allergies, such as allergic rhinitis.

The other options do not accurately describe the primary role of APCs in this context. While antibodies are produced later in the immune response, APCs themselves are not responsible for their production. Histamine release is associated with mast cells and basophils in response to allergens, but it is not a function of APCs. Inducing apoptosis of eosinophils is not a