Related Experiment Videos
Influence of age on reactivity of 1-way mixed lymphocyte cultures in young chickens
Insights
Chicken mixed lymphocyte culture (MLC) responses mature differently across strains. RPRL-72 chickens show early MLC maturation, while other strains mature later, with stimulator cell age significantly impacting responses.
Area of Science:
- Immunology
- Developmental Biology
- Avian Science
Background:
- The mixed lymphocyte culture (MLC) assay is a key tool for assessing T-cell mediated immune responses.
- Understanding the ontogeny of immune responses in chickens is crucial for poultry health and disease resistance.
Purpose of the Study:
- To investigate the developmental timeline of MLC responses in different chicken strains.
- To determine the influence of responder and stimulator cell age on chicken MLC reactivity.
Main Methods:
- A reproducible 1-way mixed lymphocyte culture (MLC) assay was employed.
- Cells from four distinct chicken strains (N, P, RPRL-72, and RPRL-63) were used.
- Experiments involved varying ages of responder and stimulator cells.
Main Results:
- RPRL-72 chicken cells demonstrated MLC responsiveness by 8 weeks of age.
- Other strains (N, P, RPRL-63) showed significant MLC responses after 14 weeks.
- The age of stimulator cells was critical, with young N birds responding well to old RPRL-72 stimulator cells, but not vice versa.
Conclusions:
- Chicken MLC ontogeny varies significantly between genetic strains.
- Stimulator cell age plays a crucial role in determining MLC outcomes, dependent on the responder strain.
- These findings have implications for understanding immune maturation in poultry.
Abstract:
A reproducible 1-way mixed lymphocyte culture (MLC) assay was used to study the ontogeny of MLC in N, P, RPRL-72 and RPRL-63 strains of chickens. The chicks were progeny of specific-pathogen-free and lymphoid leukosis virus-free parents and grown in common isolators. When cells were from responder and stimulator chickens of the same age, the RPRL-72 chickens cells responded by 8 wk, whereas cells from chickens of the other 3 strains did not respond significantly until after 14 wk of age. In MLC with 6- and 32-wk-old RPRL-72 and N birds, the age of the responder was not crucial. However, young or old N birds responded extremely well to old 72 stimulator cells, whereas young 72 cells stimulated no, or minimal, response. Thus the age of the stimulator cell is vary important in chicken MLC and appears to depend upon the responder chicken strain.