The development and validation of methods for evaluating the immune system in preweaning piglets

Area of Science:

• * Veterinary immunology and preclinical research models.
• * Development and validation of biomedical assays.

Background:

• * Preweaning piglets serve as a relevant model for infant formula safety testing.
• * Evaluating the neonatal immune system is crucial for comprehensive safety assessments.
• * Standardized and validated assays are necessary for reliable preclinical safety data.

Purpose of the Study:

• * To develop and validate three concurrent strategies for assessing the immune status of preweaning piglets.
• * To confirm the robustness of these assays for evaluating both systemic and gastrointestinal immune responses.
• * To ensure assays meet regulatory and precision standards within a Good Laboratory Practice (GLP) environment.

Main Methods:

• * Immunophenotyping to quantify circulating innate immune cell populations.
• * Multiplex cytokine analysis in circulation and gastrointestinal tissues (using immunohistochemistry - IHC).
• * Assay validation including precision, accuracy, sample stability, and response to a positive control agent.

Main Results:

• * Validated immunophenotyping accurately assessed circulating innate immune cells.
• * Cytokine monitoring demonstrated reliable detection of immune responses in circulation and GIT.
• * All three developed assays proved precise, accurate, and stable under GLP conditions.

Conclusions:

• * The three developed assays are robust and suitable for evaluating immune system status in preweaning piglets.
• * These validated methods effectively assess systemic and localized gastrointestinal immune responses.
• * The validated assays support the use of preweaning piglets as a reliable model for infant formula safety testing.