Generating mouse models of degenerative diseases using Cre/lox-mediated in vivo mosaic cell ablation

Masato Fujioka, Hisashi Tokano, Keiko Shiina Fujioka, Hideyuki Okano, Albert S.B. Edge

Research output: Contribution to journalArticlepeer-review

18 Citations (Scopus)


Most degenerative diseases begin with a gradual loss of specific cell types before reaching a threshold for symptomatic onset. However, the endogenous regenerative capacities of different tissues are difficult to study, because of the limitations of models for early stages of cell loss. Therefore, we generated a transgenic mouse line (Mos-iCsp3) in which a lox-mismatched Cre/lox cassette can be activated to produce a drug-regulated dimerizable caspase-3. Tissue-restricted Cre expression yielded stochastic Casp3 expression, randomly ablating a subset of specific cell types in a defined domain. The limited and mosaic cell loss led to distinct responses in 3 different tissues targeted using respective Cre mice: reversible, impaired glucose tolerance with normoglycemia in pancreatic β cells; wound healing and irreversible hair loss in the skin; and permanent moderate deafness due to the loss of auditory hair cells in the inner ear. These mice will be important for assessing the repair capacities of tissues and the potential effectiveness of new regenerative therapies.

Original languageEnglish
Pages (from-to)2462-2469
Number of pages8
JournalJournal of Clinical Investigation
Issue number6
Publication statusPublished - 2011 Jun 1

ASJC Scopus subject areas

  • General Medicine


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