← Gene index

UGT1A1

HGNC ↗

8 article(s) in the watch · Pharmacogenomics

UGT1A1 encodes a glucuronidation enzyme central to the clearance of bilirubin and many drugs. Its variants (notably the UGT1A1*28 allele) underlie Gilbert syndrome and modulate the toxicity of drugs such as irinotecan (pharmacogenetic guidelines).

PharmacogenomicsLevel APharmGKB 1A

Drugs involved: irinotecan; atazanavir

Recommendation: Irinotecan: RNPGx "essential", FDA/DPWG (no dedicated CPIC guideline). Atazanavir: CPIC level A.

Curated publications

9/10

Real-World Impact of UGT1A1 Genotype-Guided Irinotecan Dosing on Severe Toxicity and Hospitalization: A Multicenter Study.

Severe irinotecan toxicity in UGT1A1 poor metabolizers

PGx16 June 2026
8/10

UGT1A1 genotype testing for irinotecan: A guideline developed by the UK Centre of Excellence in Regulatory Science and Innovation in Pharmacogenomics (CERSI-PGx).

Irinotecan pharmacogenetics (UGT1A1)

PGx7 July 2026
7/10

Pharmacogenomics of dolutegravir: A scoping review of evidence, gaps and clinical implications.

HIV infection treated with dolutegravir

PGx11 August 2026
7/10

Concentration dependency of an acyl glucuronide metabolite in eltrombopag-induced hepatotoxicity: Role of UGT1A1 genotype

Eltrombopag-induced hepatotoxicity (thrombopoietin receptor agonist) — role of UGT1A1 genotype

PGx13 May 2026
6/10

Gene-dose interaction in low-dose irinotecan: a real-world cohort study of the association between adverse effects and UGT1A1 polymorphism

Irinotecan toxicity in patients treated for cancer

PGx10 November 2026
5/10

UGT1A1 gene polymorphisms and their impact on plasma trough concentrations of dolutegravir in Chinese adults with human immunodeficiency virus-1 infection.

HIV-1 infection treated with dolutegravir

PGx25 August 2026
5/10

UGT1A1 and irinotecan: Ready for routine pharmacogenetic care

Irinotecan toxicity (chemotherapy)

PGx14 July 2026
4/10

A single-arm phase II trial of UGT1A1 genotype-guided high-dose irinotecan rechallenge in refractory metastatic colorectal cancer.

Refractory metastatic colorectal cancer

PGx11 August 2026

Frequently asked questions

Which drugs are affected by UGT1A1 in pharmacogenomics?+

irinotecan; atazanavir — Irinotecan: RNPGx "essential", FDA/DPWG (no dedicated CPIC guideline). Atazanavir: CPIC level A.

How many Geno'X publications cover the UGT1A1 gene?+

8 publication(s) on UGT1A1 have been selected, summarised and scored by Geno'X on a public grading grid (domains: Pharmacogenomics).