The reconstructed skin micronucleus assay (RSMN) in EpiDerm™: detailed protocol and harmonized scoring atlas

Mutat Res. 2011 Feb 28;720(1-2):42-52. doi: 10.1016/j.mrgentox.2010.12.001. Epub 2010 Dec 13.


The European Cosmetic Toiletry and Perfumery Association (COLIPA), along with contributions from the European Centre for the Validation of Alternative Methods (ECVAM), initiated a multi-lab international prevalidation project on the reconstructed skin micronucleus (RSMN) assay in EpiDerm™ for the assessment of the genotoxicity of dermally applied chemicals. The first step of this project was to standardize the protocol and transfer it to laboratories that had not performed the assay before. Here we describe in detail the protocol for the RSMN assay in EpiDerm™ and the harmonized guidelines for scoring, with an atlas of cell images. We also describe factors that can influence the performance of the assay. Use of these methods will help new laboratories to conduct the assay, thereby further increasing the database for this promising new in vitro genotoxicity test.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Guidelines as Topic
  • Humans
  • Micronucleus Tests / methods*
  • Micronucleus Tests / standards
  • Micronucleus Tests / statistics & numerical data
  • Mutagens / toxicity
  • Skin
  • Skin Irritancy Tests / methods*
  • Skin Irritancy Tests / standards*
  • Tissue Engineering / methods
  • Validation Studies as Topic


  • Mutagens