Soluble interleukin-2 receptor in patients with glomerular diseases

Area of Science:

• Nephrology
• Immunology
• Clinical Chemistry

Background:

• Glomerular diseases involve complex immune responses.
• Assessing cellular immune status is crucial for understanding disease pathogenesis.
• Soluble interleukin-2 receptor (sIL-2R) is a marker of T-cell activation.

Purpose of the Study:

• To evaluate cellular immune status in patients with glomerular diseases using serum sIL-2R levels.
• To determine if serum sIL-2R can serve as a clinical marker for glomerulonephritis activity.
• To investigate the relationship between sIL-2R levels, renal function, and disease characteristics.

Main Methods:

• Measured serum and urinary soluble interleukin-2 receptor (sIL-2R) levels in 61 patients with glomerular diseases and 40 healthy controls.
• Analyzed correlations between sIL-2R levels, age, renal function (creatinine clearance), urinary sediment, 24-hour urinary protein, and disease subgroups.
• Compared sIL-2R levels across different patient groups and with control subjects.

Main Results:

• Patients with glomerular diseases exhibited significantly higher serum sIL-2R levels than controls.
• Serum sIL-2R levels correlated positively with age and were higher in older patients.
• Elevated serum sIL-2R was observed in patients with active urinary sediment and impaired renal function, showing a negative correlation with creatinine clearance.
• Urinary sIL-2R levels correlated with 24-hour urinary protein but did not consistently reflect disease activity or renal function.
• Nephrotic syndrome patients had higher urinary sIL-2R levels.

Conclusions:

• Increased T-cell activation likely contributes to the pathogenesis of various glomerulonephritis entities.
• Serum sIL-2R levels show promise as a clinical marker for glomerulonephritis activity, though renal function must be considered.
• Urinary sIL-2R levels may be influenced by glomerular protein leak and are less reliable for assessing disease activity.