BACKGROUND Metastatic colorectal cancer is frequently treated with irinotecan, a topoisomerase-I inhibitor. The UGT1A1 gene encodes for an enzyme that metabolizes irinotecan, and its genetic variants were shown to be associated with increased drug toxicity. We evaluated clinical outcomes associated with the UGT1A1*28 variant. METHODS The study included 329 colorectal cancer patients from the ...

UDP-glucuronosyltransferase 1A1 (UGT1A1) is a vital metabolic enzyme responsible for the clearance of endogenous substances and drugs. Hitherto, development fluorescent probes UGTs was severely restricted due to poor isoform selectivity on–off or blue-shifted fluorescence response. Herein, we established novel “molecular-splicing” strategy construct highly selective near-infrared (NIR) probe, H...

BACKGROUND & OBJECTIVES Genetic polymorphisms of uridine diphosphate glucuronyltransferase 1A1 (UGT1A1) have been associated with a wide variation of responses among patients prescribed with irinotecan. Lack of this enzyme is known to be associated with a high incidence of severe toxicity. The objective of this study was to investigate the prevalence of three different variants of UGT1A1 (UGT1A...

Uridine diphosphate glucuronosyltransferase 1A (UGT1A1), which affects irinotecan metabolism, has been associated with severe adverse reactions in patients with cancer treated with irinotecan. However, neither large-scale analysis of the distribution of UGT1A1 polymorphisms, nor standardized assessment of how UGT1A1 polymorphisms affect irinotecan treatment has been performed in China. The aim ...

Patients with co-existing hereditary spherocytosis (HS) and UDP-glucuronosyltransferase 1A1 (UGT1A1) deficiency as Gilbert's syndrome (GS) have been reported, and previous studies have demonstrated an increased risk for developing gallstones in patients with co-inheritance of GS and HS. We experienced an interesting case of HS showing persistent jaundice after splenectomy, and upon further eval...

The objective of this study was to determine allele frequency and genotyping of UGT1A1 polymorphisms (UGT1A1*28 and UGT1A1*6) in Thai colorectal cancer patients who received irinotecan treatment and develop pyrosequencing technique for UGT1A1 genetic polymorphisms detection. The Ninety-one patients entered the study. The results showed the allele frequencies for UGT1A1 genetic polymorphisms wer...

Human UDP-glucuronosyltransferase (UGT) 1A1 is a critical enzyme responsible for detoxification and metabolism of endogenous and exogenous lipophilic compounds such as bilirubin. The present study shows how cyclin-dependent kinase (CDK) inhibitor roscovitine stimulated the expression of UGT1A1 in HepG2 cells. Pregnane X receptor (PXR)-mediated transactivation of UGT1A1 reporter gene was more pr...

The etiology of pathological jaundice can not be identified in almost half of the cases. The effect of promoter polymorphism in the UDP-glucuronosyltransferase 1A1 (UGT1A1) gene was investigated in healthy breast-fed Turkish neonates with unexplained and direct Coombs'-negative ABO incompatible hyperbilirubinemia. Newborns whose peak serum bilirubin levels were > or = 17 mg/dl and < or = 12.9 m...

BACKGROUND Uridine 5'-diphospho-glucuronosyltransferase 1A1 (UGT1A1*27) is known to impair the effect of UGT in basic research; however, little clinical investigation has been conducted. To evaluate the effect of the UGT1A1*27 polymorphism in irinotecan therapy, we conducted a prospective study. METHODS Eligibility criteria included: lung cancer patients; scheduled irinotecan therapy doses of...

To determine the association between polymorphism of UGT1A1 gene and idiopathic hyperbilirubinemia in Iranian neonates. Fifty neonates with idiopathic hyperbilirubinemia and Serum total bilirubin (STB) more that 15mg/dl and 50 neonates with idiopathic hyperbilirubinemia and Serum total bilirubin (STB) less than 15mg/dl enrolled in this study. Thymine-adenine (TA)  repeats in the promoter region...