Non-coding variants impact cis-regulatory coordination in a cell type-specific manner

Pushkarev, Olga; van Mierlo, Guido; Kribelbauer, Judith Franziska; Saelens, Wouter; Gardeux, Vincent; Deplancke, Bart

doi:10.1186/s13059-024-03333-4

Cited by 2 publications

References 101 publications

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Defining Mechanistic Links Between the Non-Coding Variant rs17673553 inCLEC16Aand Lupus Susceptibility

Reddy-Rallabandi,

Singh,

Looger

et al. 2024

Preprint

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Systemic lupus erythematosus (SLE) is a complex autoimmune disorder characterized by widespread inflammation and autoantibody production. Its development and progression involve genetic, epigenetic, and environmental factors. Although genome-wide association studies (GWAS) have repeatedly identified a susceptibility signal at 16p13, its fine-scale source and its functional and mechanistic role in SLE remain unclear. We used bioinformatics to prioritize likely functional variants and validated the top candidate through various experimental techniques, including CRISPR-based genome editing in B cells. To assess the functional impact of the proposed causal variant in CLEC16A, we compared autophagy levels between wild-type (WT) and knock-out (KO) cells. Systematic bioinformatics analysis identified the highly conserved non-coding intronic variant rs17673553, with the risk allele apparently affecting enhancer function and regulating several target genes, including CLEC16A itself. Luciferase reporter assays followed by ChIP-qPCR validated this enhancer activity, demonstrating that the risk allele increases the binding of enhancer histone marks (H3K27ac and H3K4me1), CTCF-binding factor, and key immune transcription factors (GATA3 and STAT3). Knock-down of GATA3 and STAT3 via siRNA led to a significant decrease in CLEC16A expression. These regulatory effects on the target gene were further confirmed using CRISPR-based genome editing and CRISPR-dCas9-based epigenetic activation/silencing. Functionally, WT cells exhibited higher levels of starvation-induced autophagy compared to KO cells, highlighting the role of CLEC16A and the rs17673553 locus in autophagy regulation. These findings suggest that the rs17673553 locus, particularly the risk allele, drives significant allele-specific chromatin modifications and binding of multiple transcription factors, thereby mechanistically regulating the expression of target autophagy-associated genes, including CLEC16A itself. This mechanism could potentially explain the association between rs17673553 and SLE, and underlie the signal at 16p13.

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Defining Mechanistic Links Between the Non-Coding Variant rs17673553 inCLEC16Aand Lupus Susceptibility

Reddy-Rallabandi,

Singh,

Looger

et al. 2024

Preprint

View full text Add to dashboard Cite

show abstract

Defining Mechanistic Links Between the Non-Coding Variant rs17673553 in CLEC16A and Lupus Susceptibility

Rallabandi,

Singh,

Looger

et al. 2025

IJMS

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Systemic lupus erythematosus (SLE) is a complex autoimmune disorder characterized by widespread inflammation and autoantibody production. Its development and progression involve genetic, epigenetic, and environmental factors. Although genome-wide association studies (GWAS) have repeatedly identified a susceptibility signal at 16p13, its fine-scale source and its functional and mechanistic role in SLE remain unclear. We used bioinformatics to prioritize likely functional variants and validated the top candidate through various experimental techniques, including clustered regularly interspaced short palindromic repeats (CRISPR)-based genome editing in B cells. To assess the functional impact of the proposed causal variant in C-type lectin domain family 16, member A (CLEC16A), we compared autophagy levels between wild-type (WT) and knock-out (KO) cells. Systematic bioinformatics analysis identified the highly conserved non-coding intronic variant rs17673553, with the risk allele apparently affecting enhancer function and regulating several target genes, including CLEC16A itself. Luciferase reporter assays followed by chromatin immunoprecipitation-quantitative polymerase chain reaction (ChIP-qPCR) validated this enhancer activity, demonstrating that the risk allele increases the binding of enhancer histone marks (H3K27ac and H3K4me1), the CTCF-binding factor, and key immune transcription factors (GATA3 and STAT3). Knock-down of GATA3 and STAT3 via siRNA led to a significant decrease in CLEC16A expression. These regulatory effects on the target gene were further confirmed using CRISPR-based genome editing and CRISPR-dCas9-based epigenetic activation/silencing. Functionally, WT cells exhibited higher levels of starvation-induced autophagy compared to KO cells, highlighting the role of CLEC16A and the rs17673553 locus in autophagy regulation. These findings suggest that the rs17673553 locus—particularly the risk allele—drives significant allele-specific chromatin modifications and binding of multiple transcription factors, thereby mechanistically regulating the expression of target autophagy-associated genes, including CLEC16A itself. This mechanism could potentially explain the association between rs17673553 and SLE, and could underlie the signal at 16p13.

show abstract

Non-coding variants impact cis-regulatory coordination in a cell type-specific manner

Cited by 2 publications

References 101 publications

Defining Mechanistic Links Between the Non-Coding Variant rs17673553 inCLEC16Aand Lupus Susceptibility

Defining Mechanistic Links Between the Non-Coding Variant rs17673553 inCLEC16Aand Lupus Susceptibility

Defining Mechanistic Links Between the Non-Coding Variant rs17673553 in CLEC16A and Lupus Susceptibility

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