Case series: CTLA4-IgG1 therapy in minimal change disease and focal segmental glomerulosclerosis

Eduardo H. Garin, Jochen Reiser, Gabriel Cara-Fuentes, Changli Wei, Dany Matar, Heiman Wang, Nada Alachkar, Richard J. Johnson

Research output: Contribution to journalArticlepeer-review

Abstract

Background: Minimal Change Disease (MCD) in relapse is associated with increased podocyte CD80 expression and elevated urinary CD80 excretion, whereas focal segmental glomerulosclerosis (FSGS) has mild or absent CD80 podocyte expression and normal urinary CD80 excretion. Methods: One patient with MCD, one patient with primary FSGS and three patients with recurrent FSGS after transplantation received CD80 blocking antibodies (abatacept or belatacept). Urinary CD80 and CTLA-4 levels were measured by ELISA. Glomeruli were stained for CD80. Results: After abatacept therapy, urinary CD80 became undetectable with a concomitant transient resolution of proteinuria in the MCD patient. In contrast, proteinuria remained unchanged after abatacept or belatacept therapy in the one patient with primary FSGS and in two of the three patients with recurrent FSGS despite the presence of mild CD80 glomerular expression but normal urinary CD80 excretion. The third patient with recurrent FSGS after transplantation had elevated urinary CD80 excretion immediately after surgery which fell spontaneously before the initiation of abatacept therapy; after abatacept therapy, his proteinuria remained unchanged for 5 days despite normal urinary CD80 excretion. Conclusion: These observations are consistent with a role of podocyte CD80 in the development of proteinuria in MCD. In contrast, CD80 may not play a role in recurrent FSGS since the urinary CD80 of our three patients with recurrent FSGS was only increased transiently after surgery and normalization of urinary CD80 did not result in resolution of proteinuria.

Original languageEnglish (US)
Pages (from-to)469-477
Number of pages9
JournalPediatric Nephrology
Volume30
Issue number3
DOIs
StatePublished - Mar 2014
Externally publishedYes

Keywords

  • CD80
  • CTLA-4
  • Focal segmental glomerulosclerosis
  • Minimal change disease
  • Nephrotic syndrome

ASJC Scopus subject areas

  • Pediatrics, Perinatology, and Child Health
  • Nephrology

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