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Characterising a Novel Therapeutic Target for Psoriasis, TYK2, Using Functional Genomics.

Shraddha S Rane1,2, Sarah Elyoussfi1,3, Elan Shellard1

  • 1School of Biological Sciences, Faculty of Biology Medicine and Health, Manchester Academic Health Science Centre, The University of Manchester, Manchester M13 9PT, UK.

International Journal of Molecular Sciences
|December 17, 2024
PubMed
Summary
This summary is machine-generated.

Genetic variants near the TYK2 gene influence Psoriasis (Ps) by regulating TYK2 expression. This study used CRISPR technology to show these distal Single-Nucleotide Polymorphisms (SNPs) impact TYK2 and related inflammatory genes, advancing Ps disease understanding.

Keywords:
STATTYK2deucravacitinibprotective allelepsoriasisrisk allele

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Area of Science:

  • Genetics and Immunology
  • Molecular Biology
  • Dermatology

Background:

  • Psoriasis (Ps) is a chronic immune-mediated skin disease affecting 1-3% of the global population.
  • Tyrosine kinase 2 (TYK2) is a validated therapeutic target for Ps.
  • Genetic associations suggest non-coding variants upstream of TYK2 influence its expression and Ps risk.

Purpose of the Study:

  • To investigate if Single-Nucleotide Polymorphisms (SNPs) near ILF3 act as distal regulators of TYK2 expression and Psoriasis (Ps) risk.
  • To elucidate the role of TYK2 pathway dysregulation in Ps pathogenesis.
  • To identify downstream genes regulated by these risk SNPs.

Main Methods:

  • Developed CRISPR activation and inhibition systems in Jurkat T cells to manipulate specific Ps risk variants (rs892086, rs7248205).
  • Employed functional genomics and molecular biology techniques to assess gene regulation.
  • Utilized RNA-sequencing (RNA-seq) to analyze differential gene expression in the TYK2 pathway.

Main Results:

  • Demonstrated that distal risk SNPs, located upstream of TYK2, can indeed regulate TYK2 gene expression.
  • Identified differentially expressed genes including VEGFA, C1R, ADORA1, GLUD2, NDUFB8, and FCGR2C, implicated in Ps and other inflammatory conditions.
  • Confirmed the relevance of these genes in inflammatory conditions through database comparisons.

Conclusions:

  • The study confirms that non-coding genetic variants can distally regulate TYK2 expression, contributing to Psoriasis (Ps) risk.
  • The identified downstream genes offer potential biomarkers and therapeutic targets within the TYK2 pathway.
  • This research enhances the understanding of Psoriasis (Ps) disease biology through advanced genetic and molecular approaches.