Red blood cell aggregation in nephrotic syndrome.

Area of Science:

• Hematology
• Nephrology
• Biophysics

Background:

• Red blood cell (RBC) aggregation, influenced by fibrinogen, impacts blood flow and may contribute to thrombosis.
• Nephrotic syndrome (NS) is characterized by high fibrinogen levels and increased thrombotic events.

Purpose of the Study:

• To investigate red blood cell (RBC) aggregation in patients with nephrotic syndrome (NS).
• To determine the relationship between RBC aggregation, fibrinogen levels, and renal function in NS.

Main Methods:

• Three RBC aggregation assays were employed: aggregation half time (AHT), zeta sedimentation ratio (ZSR), and microscopic aggregation index (MAI).
• Patient blood samples were compared to healthy controls.

Main Results:

• RBC aggregation, assessed by AHT and ZSR, was significantly elevated in NS patients compared to controls (P < 0.001).
• Increased RBC aggregation correlated strongly with plasma fibrinogen levels (r = 0.75 for AHT, r = 0.84 for ZSR).
• The MAI method showed no significant difference, likely due to assay limitations at high fibrinogen levels.

Conclusions:

• RBC aggregation is significantly increased in nephrotic syndrome, independent of renal insufficiency.
• Elevated RBC aggregation may contribute to the thrombotic risk in NS patients.
• Fibrinogen is a key driver of increased RBC aggregation in this condition.