Antibody-dependent cell-mediated cytotoxicity in pigs

Area of Science:

• Immunology
• Veterinary Science
• Cellular Biology

Background:

• Antibody-dependent cell-mediated cytotoxicity (ADCC) is a crucial immune mechanism.
• Understanding ADCC development in neonatal animals is vital for immune system research.

Purpose of the Study:

• To investigate the development and tissue distribution of ADCC activity in fetal and neonatal pigs.
• To correlate ADCC activity with neutrophil populations in various tissues.

Main Methods:

• Cells were isolated from porcine fetal and neonatal tissues, including pulmonary washouts, hepatic tissues, splenic tissues, and blood neutrophil fractions.
• ADCC activity was measured in these cell populations.
• Neutrophil numbers in tissues were assessed.

Main Results:

• Neutrophils from both fetal and newborn pigs exhibited high ADCC activity.
• Cells from other organs (pulmonary, hepatic, splenic) showed peak ADCC activity shortly after birth.
• Pulmonary and hepatic cell ADCC activity declined within 84 hours post-birth.
• Increased ADCC activity correlated with increased neutrophil numbers in tissues.

Conclusions:

• Porcine neutrophils are a primary source of ADCC activity from fetal to neonatal stages.
• ADCC activity in non-hematopoietic tissues of neonatal pigs is transient and linked to neutrophil infiltration.
• This study provides insights into the ontogeny of cellular cytotoxicity in pigs.