Interleukin-10 pharmacokinetics in intact and nephrectomized mice

Area of Science:

• Pharmacology
• Nephrology
• Immunology

Background:

• Interleukin-10 (IL-10) is a crucial immunomodulatory cytokine.
• Understanding cytokine pharmacokinetics is vital for therapeutic applications.
• The role of renal function in IL-10 elimination has not been fully elucidated.

Purpose of the Study:

• To investigate the influence of kidney function on the pharmacokinetics of interleukin-10 (IL-10).
• To determine if the kidneys play a role in the elimination of IL-10 from circulation.

Main Methods:

• Pharmacokinetic analysis of recombinant human IL-10 in intact versus acutely nephrectomized mice.
• Single intravenous bolus injection of E. coli-derived recombinant h IL-10 at 250 µg/kg.
• Serum IL-10 concentrations were measured over 1 hour post-injection to assess Cmax, AUC(tf), and terminal half-life.

Main Results:

• Intact mice showed a Cmax of 1,172 ng/ml and an AUC(tf) of 385 ng·h/ml.
• Anephric mice exhibited a 4-fold increase in Cmax and a 7-fold increase in AUC(tf) compared to intact mice.
• Serum IL-10 concentration at 1 hour was significantly higher in anephric mice (1,684 ng/ml) versus intact mice (87 ng/ml).

Conclusions:

• The kidneys play a significant role in the elimination of interleukin-10 (IL-10) from circulation.
• Impaired kidney function leads to altered IL-10 pharmacokinetics, characterized by reduced clearance and prolonged exposure.
• These findings suggest that IL-10 elimination is a renal-dependent process, similar to other cytokines.