Variants in BANK1 are associated with lupus nephritis of European ancestry

Karin Bolin1, Juliana Imgenberg-Kreuz1, Dag Leonard1

  • 1Department of Medical Sciences and Science for Life Laboratory, Uppsala University, Uppsala, Sweden.

Genes and Immunity
|June 15, 2021
PubMed

Insights

Genetic variations in BANK1 are linked to lupus nephritis (LN), a kidney complication of SLE. This study identifies BANK1 as a potential factor in LN development, highlighting its role in disease pathogenesis.

Area of Science:

  • Genetics
  • Immunology
  • Nephrology

Background:

  • The genetic underpinnings of lupus nephritis (LN), a severe manifestation of systemic lupus erythematosus (SLE), remain incompletely understood.
  • Identifying genetic factors associated with LN is crucial for understanding its pathogenesis and developing targeted therapies.

Purpose of the Study:

  • To investigate the genetic associations with lupus nephritis (LN) in a large cohort of SLE patients.
  • To explore the role of genetic variations, specifically in the BANK1 gene, in LN pathogenesis and its regulation by DNA methylation.

Main Methods:

  • A case-only study design involving 2886 SLE patients, with 947 diagnosed with LN.
  • Genotyping was performed using Immunochip and a custom array across discovery and replication cohorts (Sweden, US, Denmark/Norway).
  • DNA methylation data was analyzed to identify methylation quantitative trait loci (meQTL) effects.

Main Results:

  • Six loci, including BANK1, were initially associated with LN in the discovery cohort.
  • BANK1 variants showed a significant association with LN across meta-analyses of multiple cohorts (p = 2.2 × 10-7).
  • DNA methylation data revealed meQTL effects between CpG sites and BANK1 variants in LN patients.

Conclusions:

  • Genetic variations in the BANK1 gene are significantly associated with lupus nephritis (LN).
  • Evidence suggests that DNA methylation within the BANK1 locus is genetically regulated, indicating a functional role for BANK1 in LN.
  • The study highlights BANK1 as a key genetic factor contributing to the pathogenesis of lupus nephritis.

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