Effects of Pyruvate-Based or Lactate-Based Peritoneal Dialysis Solutions on Neutrophil Intracellular pH

Acidic (pH 5.2) incubation mixtures containing pyruvate-based or lactate-based peritoneal dialysis solutions (PDSN's) induced comparable degrees of intracellular acidosis in neutrophils. However, addition of an acidic (pH 5.2), pyruvate-based PDSN to a pH-7.4, neutrophil/phosphate-buffered saline mixture brought about higher extracellular and intracellular (neutrophil) pH values when compared to the introduction of an equally acidic, lactate-based PDSN. This poor ability of acidic (pH 5.0-5.5), pyruvate-based PDSN's to resist alkalinizing influences is the cause for the above higher pH values. The higher intracellular pH levels so obtained may be a reason behind why acidic, pyruvate-based PDSN's appear to be more biocompatible than their equally acidic, lactate-based counterparts.

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