Epithelial cells from wild-type mice were used to induce tracheospheres formation. After 10 days,
Rapamycin (final concentration 200nM, LC Laboratories) or EtOH 100% (control) was added to the MTEC/SF for 6 days. Medium was changed every day.
For TSC1 KO recombination in culture, epithelial cells from Krt5-Cre Rosa26R-LacZ with or without TSC1 fl/fl were used to induce spheres formation. After 9 days,
4-OH-Tmx (final concentration 300nM, Sigma) or EtOH 100% (control) was added to the MTEC/SF for 48h.
Then tracheospheres were fixed with 4% paraformaldehyde in PBS, stained and imaged as described above for whole trachea. Antibody used to detect cleaved Caspase-3 was
rabbit anti-cleaved Casp3, 1:400 (#9661, Cell Signaling).
Haller S., Kapuria S., Riley R.R., O’Leary M.N., Schreiber K.H., Andersen J.K., Melov S., Que J., Rando T.A., Rock J., Kennedy B.K., Rodgers J.T, & Jasper H. (2017). mTORC1 activation during repeated regeneration impairs somatic stem cell maintenance. Cell stem cell, 21(6), 806-818.e5.