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Integrative Transcriptomic and Genetic Analysis Prioritizes SLC1A5 as a Programmed Cell Death-Associated Candidate
Jizhao Yao1, Honghui Chen1, Xiulian Zhou1
1Department of Dermatology, Yuebei People's Hospital, Shaoguan, Guangdong, 512026, People's Republic of China.
Clinical, Cosmetic and Investigational Dermatology
|July 23, 2026
Summary
This study identifies SLC1A5 as a programmed cell death (PCD) gene linked to vitiligo, potentially impacting the condition through metabolic changes and immune responses. Further research is needed to explore its therapeutic potential.
Area of Science:
- Genetics and Bioinformatics
- Immunology
- Dermatology
Background:
- Programmed cell death (PCD) involvement in autoimmune disorders is known, but its specific role in vitiligo pathogenesis is unclear.
- Vitiligo is an autoimmune condition characterized by the loss of melanocytes, leading to skin depigmentation.
Purpose of the Study:
- To identify programmed cell death (PCD)-related genes associated with vitiligo.
- To elucidate the potential role of these genes in vitiligo development using bioinformatics.
- To investigate the genetic underpinnings and potential therapeutic targets for vitiligo.
Main Methods:
- Integrated analysis of three Gene Expression Omnibus (GEO) datasets (GSE65127, GSE53146, GSE75819) comprising 40 controls and 30 vitiligo samples.
- Identification of differentially expressed genes (DEGs) and assessment of 11 PCD pathways using Gene Set Variation Analysis (GSVA).
- Application of Summary-data-based Mendelian Randomization (SMR), HEIDI testing, Bayesian colocalization, and immune infiltration analyses to identify causal genes and immune cell profiles.
Main Results:
- 922 DEGs were identified; pyroptosis and cuproptosis were upregulated, while autophagy and lysosome-dependent cell death markers were downregulated in vitiligo.
- SLC1A5 and PARK7 were prioritized as key PCD-related genes associated with vitiligo risk, with strong genetic evidence supporting SLC1A5.
- SLC1A5 downregulation correlated with altered melanogenesis, tyrosine metabolism, and immune cell infiltration (increased aDC, T helper, Th2; decreased NK CD56bright cells), indicating its role in metabolic reprogramming and immune modulation in vitiligo.
Conclusions:
- SLC1A5 is identified as a genetically anchored, PCD-associated gene implicated in vitiligo pathogenesis via metabolic reprogramming and immune modulation.
- Strong genetic evidence supports SLC1A5 as a candidate gene for vitiligo, warranting further mechanistic and translational research.
- Functional studies are essential to validate SLC1A5 as a potential therapeutic target for vitiligo.
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