[PRODUCTION OF REACTIVE OXYGEN SPECIES AND DEVELOPMENT OF APOPTOSIS IN BLOOD LEUKOCYTES IN EXPERIMENTAL...

Area of Science:

• Immunology
• Pathobiology

Background:

• Antiphospholipid syndrome (APS) is an autoimmune disorder.
• Understanding cellular mechanisms in APS is crucial for developing targeted therapies.

Purpose of the Study:

• To investigate apoptosis and reactive oxygen species (ROS) formation in blood cells of mice with experimental APS.
• To evaluate the impact of APS on leukocyte viability and population dynamics.

Main Methods:

• Flow cytometry was used to assess apoptosis (Annexin V/propidium iodide) and ROS levels (2',7'-dichlorofluorescein diacetate) in mouse blood leukocytes.
• Cell viability and light scattering (FS/SS) were analyzed to differentiate leukocyte populations.

Main Results:

• APS significantly reduced blood leukocyte viability compared to controls, partly due to apoptosis.
• A redistribution of leukocyte populations was observed, with an increase in granulocytes.
• Basal ROS production decreased in both granulocytes (27%) and agranulocytes (19%) in APS mice.

Conclusions:

• Enhanced apoptosis and deficient ROS formation are significant in the pathobiochemical mechanisms of experimental APS.
• These findings highlight potential therapeutic targets within cellular apoptosis and ROS pathways in APS.