Laboratory Medicine ›› 2021, Vol. 36 ›› Issue (8): 875-879.DOI: 10.3969/j.issn.1673-8640.2021.08.020

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External quality assessment of irinotecan-related metabolism genotyping in Shanghai

ZHANG Pengyin, QUAN Jing, WANG Xueliang, XIAO Yanqun, BAO Yun()   

  1. Shanghai Center for Clinical Laboratory,Shanghai 200126,China
  • Received:2019-11-29 Online:2021-08-30 Published:2021-08-30
  • Contact: BAO Yun

Abstract:

Objective To use human genome DNA as quality control samples to evaluate the performance of irinotecan-related metabolism genotyping in external quality assessment(EQA) program,and to discuss the problems found in clinical laboratories enrolled. Methods The samples of various combination of Urdine Diphosphate glucuronosyltransferase 1 family polypeptide A1 (UGT1A1)*6 and UGT1A1*28 genotyped by human genome DNA sequencing were obtained. Each sample panel contained 5 different samples of the genomic DNA above. Participating clinical laboratories were asked to test these samples using their routine methods and report the results before deadline. The score of each laboratory and the overall compliance rate of different samples as well as the sensitivity and specificity of different methods were calculated based on their results. Results The 88.00%(22/25) and 86.36%(19/22) of the clinical laboratories submitted correct results for all the samples in 2 EQA schemes. The overall compliance rates were 96.33%(236/245) and 96.74%(208/215),respectively. All the clinical laboratories using digital fluorescence hybridization got full credits in 2 EQA schemes. The compliance rates for Sanger sequencing were 91.82%(101/110) and 93.00%(93/100),respectively. Conclusions The overall accuracy rate of clinical laboratories enrolled is high,while the performance capability of some clinical laboratories needs to be improved,especially the whole process quality control of clinical laboratory developed Sanger sequencing.

Key words: Urdine Diphosphate glucuronosyltransferase 1 family polypeptide A1, Irinotecan, Genetic testing, Quality control, External quality assessment

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