PURE CULTURES OF LARGE MONONUCLEAR LEUCOCYTES

Area of Science:

• Cell Biology
• Immunology
• Hematology

Background:

• Mononuclear leucocytes are key immune cells found in blood.
• Understanding their in vitro behavior is crucial for immunology research.
• Previous studies have explored leucocyte culture but detailed characterization of chicken mononuclear leucocytes is limited.

Purpose of the Study:

• To isolate and characterize pure strains of mononuclear leucocytes from adult chickens.
• To investigate the in vitro migration, proliferation, and differentiation potential of these cells.
• To determine factors influencing the activity of chicken mononuclear leucocytes.

Main Methods:

• Isolation of pure strains of mononuclear leucocytes from adult chicken blood.
• In vitro culture of leucocytes for up to 3 months.
• Comparative analysis of leucocyte migration and proliferation rates against fibroblasts.
• Observation of cellular morphology changes and differentiation.
• Assessment of the effects of embryonic tissue juice and homologous serum on cell activity.

Main Results:

• Pure mononuclear leucocytes were successfully isolated and maintained in active culture for 3 months.
• These cells exhibited slower in vitro migration and proliferation compared to fibroblasts.
• Unlike fibroblasts and epithelial cells, leucocytes did not form tissues and were less resistant.
• Under specific conditions, large mononuclear leucocytes differentiated into cells resembling fibroblasts.
• Embryonic tissue juice enhanced leucocyte activity, while homologous serum inhibited it.

Conclusions:

• Chicken mononuclear leucocytes can be cultured in vitro for extended periods.
• Their distinct migratory, proliferative, and tissue-forming properties differentiate them from fibroblasts and epithelial cells.
• The potential for differentiation into fibroblast-like cells suggests a degree of cellular plasticity.
• External factors like embryonic tissue juice and homologous serum significantly modulate leucocyte activity, offering insights into immune regulation.