Quantitative analysis of the UDP-glucuronosyltransferase transcriptome in human tissues
Lucas Zhou1, Abelardo D Montalvo1, Joseph M Collins1
1Department of Pharmacotherapy and Translational Research, College of Pharmacy, Center for Pharmacogenomics, University of Florida, Gainesville, Florida, USA.
Pharmacology Research & Perspectives
|November 20, 2023
Summary
UDP-glucuronosyltransferases (UGTs) are crucial drug metabolizing enzymes. This study reveals significant variability in human UGT expression across tissues, impacting drug response and disease risk.
Area of Science:
- Pharmacogenomics
- Drug Metabolism
- Molecular Biology
Background:
- UDP-glucuronosyltransferases (UGTs) are phase II enzymes vital for detoxifying endogenous and exogenous compounds.
- Human UGTs exhibit diverse expression, substrate specificity, and physiological roles, influencing drug responses, hormone balance, and disease susceptibility.
- Understanding tissue-specific UGT expression and regulation is crucial for personalized medicine.
Purpose of the Study:
- To comprehensively analyze the tissue-specific transcriptome of all 22 human UDP-glucuronosyltransferases (UGTs).
- To investigate the transcriptional regulation and coexpression patterns of UGTs in various human tissues.
- To establish a foundational understanding of UGT expression variability for future research.
Main Methods:
- RNA sequencing (RNAseq) data from the Genotype-Tissue Expression (GTEx) project was used to analyze UGT transcriptomes across 54 human tissues.
- Real-time PCR was employed for validation in liver and small intestine samples.
- Bioinformatic analysis was performed to assess interindividual variability and coexpression networks.
Main Results:
- Significant interindividual variability was observed in the expression levels and splice isoform composition of UGTs across different human tissues.
- UGTs demonstrated tissue-specific expression profiles, highlighting differential roles in various organs.
- Coexpression of UGTs with Cytochrome P450 enzymes and transcription factors in the liver suggests coordinated regulation.
Conclusions:
- The study provides a comprehensive map of human UGT expression across diverse tissues, revealing substantial variability.
- Findings underscore the importance of tissue-specific UGT expression in drug metabolism, toxicity, and disease.
- This research lays the groundwork for further investigation into UGT regulation and its clinical implications.
