The causal relationship between the palmitoylation gene ZDHHC13 and ulcerative colitis: A Mendelian randomization...

Area of Science:

• Genetics
• Immunology
• Gastroenterology

Background:

• Ulcerative colitis (UC) is a chronic inflammatory bowel disease with complex underlying mechanisms.
• Palmitoylation, a post-translational modification, plays roles in various cellular processes, but its connection to UC is not fully understood.

Purpose of the Study:

• To investigate the potential causal relationship between palmitoylation and ulcerative colitis (UC).
• To identify specific palmitoylation-related genes and explore their mechanistic links to UC pathogenesis.
• To elucidate the role of immune cells in mediating the effects of palmitoylation on UC.

Main Methods:

• Mendelian randomization analysis was employed using a large Finnish UC patient dataset (n=5034) and palmitoylation target genes.
• Bioinformatics analysis, including eQTL and protein quantitative trait loci, was used for gene screening.
• Sensitivity and pleiotropy tests ensured the robustness of the identified causal relationships.
• Mediation analysis incorporating immune cell data explored potential mechanistic pathways.

Main Results:

• Five palmitoylation target genes demonstrated a significant causal relationship with UC.
• ZDHHC13 and PPT1 were identified as key potential gene targets through bioinformatics analysis.
• A significant mechanism involving ZDHHC13, CD62L- monocyte AC immune cells, and UC was uncovered.
• The palmitoylation gene ZDHHC13 was found to regulate CD62L- monocyte AC immune cells, potentially inhibiting UC.

Conclusions:

• A significant causal relationship exists between palmitoylation and ulcerative colitis.
• The palmitoylation gene ZDHHC13 plays a crucial role by modulating CD62L- monocyte AC immune cells.
• Targeting ZDHHC13 and its associated immune pathways presents a potential therapeutic strategy for UC.