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Related Experiment Video

Updated: Aug 21, 2025

Surgical Techniques for Catheter Placement and 5/6 Nephrectomy in Murine Models of Peritoneal Dialysis
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Alpha-klotho and peritoneal membrane status: A hypothesis generating study.

Patrícia Branco1,2, Ana Rita Martins1, Rita Calça1

  • 1Nephrology Department, Hospital Santa Cruz, Centro Hospitalar de Lisboa Ocidental (CLHO), Lisboa, Portugal.

European Journal of Clinical Investigation
|November 15, 2022
PubMed
Summary

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Peritoneal membrane fibrosis can be present before dialysis initiation. Alpha-Klotho protein levels in blood may indicate this fibrosis, suggesting its role in peritoneal dialysis success.

Area of Science:

  • Nephrology
  • Pathology
  • Biochemistry

Background:

  • Peritoneal dialysis (PD) success hinges on the peritoneal membrane's integrity.
  • Fibrosis may affect the peritoneal membrane even before PD initiation.
  • The relationship between pre-dialysis membrane status and a patient's uremic profile requires investigation.

Purpose of the Study:

  • To test the hypothesis that peritoneal membrane fibrosis is present pre-dialysis.
  • To explore the association between pre-dialysis peritoneal membrane status and specific blood protein biomarkers.
  • To determine if blood protein levels can predict the state of the peritoneal membrane.

Main Methods:

  • A cross-sectional study of 58 incident PD patients.
  • Peritoneal biopsies were analyzed for submesothelial compact zone thickness (STM), vasculopathy, and inflammation.
Keywords:
biopsycytokinesdiabetesperitoneal membrane fibrosisprecision medicineuraemic toxins

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  • Blood levels of proteins including alpha-Klotho, Galectin-3, FGF21, FGF23, Tweak, TNFα, and hsCRP were measured.

    • Main Results:

    • 38% of patients exhibited pre-dialysis peritoneal membrane fibrosis.
    • Alpha-Klotho and FGF21 levels were negatively correlated with STM.
    • Alpha-Klotho levels effectively discriminated fibrosis and were independently associated with peritoneal membrane fibrosis.

    Conclusions:

    • Peritoneal membrane fibrosis is present in a significant subset of patients before starting dialysis.
    • Alpha-Klotho protein shows potential as a biomarker for pre-dialysis peritoneal membrane fibrosis.
    • Further research into alpha-Klotho's role could inform strategies to preserve peritoneal membrane health in PD patients.