Effect of benfotiamine in podocyte damage induced by peritoneal dialysis fluid

Sandra Müller-Krebs, Katharina Nissle, Julia Tsobaneli, Martin Zeier, Lars Philipp Kihm, Zoltan Kender, Thomas Fleming, Peter Paul Nawroth, Jochen Reiser, Vedat Schwenger

Research output: Contribution to journalArticlepeer-review

Abstract

Background: In peritoneal dialysis (PD), residual renal function (RRF) fundamentally contributes to improved quality of life and patient survival. High glucose and advanced glycation end-products (AGE) contribute locally to peritoneal and systemically to renal damage. Integrity of podocyte structure and function is of special importance to preserve RRF. Benfotiamine could counteract the glucose and AGE-mediated toxicity by blocking hyperglycemia-associated podocyte damage via the pentose-phosphate pathway. Methods: A human differentiated podocyte cell line was incubated with control solution (control), 2.5% glucose solution (glucose), and 2.5% peritoneal dialysis fluid (PDF) for 48 h either ±50 μM benfotiamine. Podocyte damage and potential benefit of benfotiamine were analyzed using immunofluorescence, western blot analysis, and a functional migration assay. For quantitation, a semiquantitative score was used. Results: When incubating podocytes with benfotiamine, glucose, and PDF-mediated damage was reduced, resulting in lower expression of AGE and intact podocin and ZO-1 localization. The reorganization of the actin cytoskeleton was restored in the presence of benfotiamine as functional podocyte motility reached control level. Decreased level of inflammation could be shown as well as reduced podocyte apoptosis. Conclusion: These data suggest that benfotiamine protects podocytes from glucose and PDF-mediated dysfunction and damage, in particular, with regard to cytoskeletal reorganization, motility, inflammation, and podocyte survival.

Original languageEnglish (US)
Pages (from-to)10
Number of pages1
JournalFrontiers in Medicine
Volume2
Issue numberMAR
DOIs
StatePublished - 2015
Externally publishedYes

Keywords

  • Benfotiamine
  • Glucose degradation products
  • High glucose
  • Peritoneal dialysis
  • Peritoneal dialysis fluids
  • Podocytes
  • Systemic toxicity

ASJC Scopus subject areas

  • General Medicine

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