Antibody Repertoire Development in Swine.

Area of Science:

• Comparative immunology
• Veterinary medicine
• Genomics

Background:

• The domestication of swine has led to their significant value in agriculture and bioscience.
• Understanding swine immunology is crucial for both animal health and human health research.
• Existing knowledge of swine immunoglobulin (Ig) genes and their role in immune response is limited.

Purpose of the Study:

• To compare swine immunoglobulin (Ig) genes with those of other vertebrates.
• To analyze the genetic maps of heavy and light chain loci in swine, detailing their polygeny and polymorphy.
• To investigate B-cell and antibody repertoire development in swine, challenging mouse-centric models.

Main Methods:

• Comparative gene mapping of immunoglobulin loci.
• Analysis of B-cell development and antibody repertoire.
• Study of ileal Peyer's patches and their role in immune response.
• Utilizing the isolator piglet model for experimental studies.

Main Results:

• Detailed gene maps for swine immunoglobulin heavy and light chain loci were established.
• Swine B-cell development and antibody repertoire show unique characteristics potentially differing from mouse models.
• Ileal Peyer's patches play a significant role in swine immune development, particularly in producing secretory IgA.
• Bacterial PAMPs were found to drive adaptive immunity development in swine fetuses.

Conclusions:

• Swine possess unique immunoglobulin gene structures and immune development pathways.
• Ileal Peyer's patches and early class switch in swine are crucial for developing natural secretory IgA, preventing gut bacterial translocation.
• The isolator piglet model is a valuable tool for studying swine immune development and related issues.