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Updated: Jan 29, 2026

Generation of Mosaic Mammary Organoids by Differential Trypsinization
Published on: March 11, 2020
Generating Genetic Mosaic Mouse Embryos or Organoids for Studies of Kidney Development
1Department of Genetics and Development, 1418 Hammer Health Sciences Center, Columbia University, New York, NY, USA. fdc3@columbia.edu.
Abstract:
For studies of gene function during development, it can be very useful to generate mosaic embryos in which a small subset of cells in a given cell lineage lacks a gene of interest and carries a marker that allows the mutant cells to be specifically visualized and compared to wild-type cells. Several methods have been used to generate genetically mosaic mouse kidneys for such studies. These include (1) chimeric embryos generated using embryonic stem cells, (2) chimeric renal organoids generated by dissociation and reaggregation of the fetal kidneys, (3) generation of a knockout allele with a built-in reporter gene, (4) mosaic analysis with double markers (MADM), and (5) mosaic mutant analysis with spatial and temporal control of recombination (MASTR). In this chapter, these five methods are described, and their advantages and disadvantages are discussed.
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