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China Surfactant Detergent & Cosmetics ›› 2022, Vol. 52 ›› Issue (9): 1016-1022.doi: 10.3969/j.issn.1001-1803.2022.09.015

• Analytical methods and testing • Previous Articles     Next Articles

Study on the alternative method for assessing eye irritation of chemicals using in vitro and in silico approaches

Lin Ni1,2,3,Luo Feiya1,*(),Cao Chunran2,3,Hu Yuchi2,3,*()   

  1. 1. National Institutes for Food and Drug Control, Beijing 100050, China
    2. State Drug Administration Key Laboratory of Innovative Drug Safety Research and Evaluation, Beijing Institute for Drug Control, Beijing 102206, China
    3. Beijing Key Laboratory of Analysis and Evaluation on Chinese Medicine, Beijing Institute for Drug Control, Beijing 102206, China
  • Received:2021-11-18 Revised:2022-09-05 Online:2022-09-22 Published:2022-09-23
  • Contact: Feiya Luo,Yuchi Hu E-mail:feiya.luo@nifdc.org.cn;yuchihu@bidc.org.cn

Abstract:

The aim of the study was to establish the alternative method for preliminary assessing eye irritation of chemicals using Fluorescein Leakage test (FL test) and Quantitative Structure Activity Relationship (QSAR), to detect and classify the ocular irritation of the recommended substances, and to explore the application value of different alternative methods. Using Toxtree models to predict eye irritation and irritation potency of 8 recommended substances for demonstrating technical proficiency. The test substances were prepared into series of concentrations and exposed with the Madin-Darby canine kidney cell (MDCK) for 1 min to test the percentage of fluorescein leakage (FL/%). The results were categorized according to the classification criteria for assessing eye irritation. Then, the sensitivity, specificity, and accuracy of FL test and Toxtree models were evaluated. Furthermore, the consistency of FL test or Toxtree model was compared with UN-GHS (United Nationas Globally Harmonized System of Classification and Labelling of Chemicals) classification. When FL test is used to distinguish if the test substance belongs to severe irritation/corrosion (GHS Cat. 1), the irritation potency of all test substances is concordant with that in GHS classification (Kappa=1, P=0.005). When FL test is used to distinguish if the test substance is severe irritation/corrosion (GHS Cat. 1), moderate irritation (GHS Cat. 2A) or mild/no irritation (GHS Cat. 2B/No Cat.) substances, the irritation potency of all test substances is concordant with GHS classification in the eye irritant potency (Kappa=0.579, P=0.035). The results predicted by Toxtree software demonstrate that it is more suitable to firstly estimate the possible substances with mild/no ocular irritation. The FL test is an effective and valuable alternative method for evaluating eye irritation, and it is more applicable to identify chemicals with severe irritation/corrosion or to be the study firstly carried out using the “Top-Down approach” of the integrated decision-tree testing strategy for eye irritation. The results predicted by Toxtree software could be reference data for the integrated assessment on eye irritation.

Key words: eye irritation, alternative method, in vitro, quantitative structure-activity relationship, fluorescein leakage test, Toxtree model

CLC Number: 

  • TQ658