Lymphocyte blastogenesis in patients receiving hemodialysis

Area of Science:

• Immunology
• Nephrology
• Cell Biology

Background:

• Chronic renal failure (CRF) can impair immune function, potentially affecting lymphocyte responses.
• Previous studies suggested significant immune defects in CRF patients, but optimal culture conditions were not always employed.

Purpose of the Study:

• To investigate lymphocyte blastogenic transformation in patients with advanced chronic renal failure.
• To determine if optimal buffering conditions can restore normal lymphocyte responsiveness.

Main Methods:

• Lymphocyte blastogenic transformation assays were performed using plant lectins and allogeneic cells.
• Cultures were conducted with normal sera, patient sera, and varying buffering capacities (bicarbonate vs. HEPES).
• Concanavalin A (Con A) induced blastogenesis was specifically examined.

Main Results:

• Lymphocytes from CRF patients exhibited minimal blastogenic depression when cultured in buffered media with indifferent plasma.
• Optimal bicarbonate buffering revealed near-normal lymphocyte responsiveness compared to healthy controls.
• Fresh patient plasma and HEPES buffer resulted in depressed Con A blastogenesis.

Conclusions:

• Lymphocyte function in advanced chronic renal failure patients may be near normal under optimized in vitro conditions.
• The observed immune defect is likely attributable to intracellular acidosis rather than inherent lymphocyte dysfunction.
• These findings highlight the importance of culture conditions in assessing immune status in renal insufficiency.