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Castration-Resistant Lgr5+ Cells Are Long-Lived Stem Cells Required for Prostatic Regeneration

Wang, B., Wang, X., Long, J.E., Eastham-Anderson, J., Firestein, R., Junttila, M.R.

The adult prostate possesses a significant regenerative capacity that is of great interest for understanding adult stem cell biology. We demonstrate that leucine-rich repeat-containing G protein-coupled receptor 5 (Lgr5) is expressed in a rare population of prostate epithelial progenitor cells, and a castration-resistant Lgr5+ population exists in regressed prostate tissue. Genetic lineage tracing revealed that Lgr5+ cells and their progeny are primarily luminal. Lgr5+ castration-resistant cells are long lived and upon regeneration, both luminal Lgr5+ cells and basal Lgr5+ cells expand. Moreover, single Lgr5+ cells can generate multilineage prostatic structures in renal transplantation assays. Additionally, Lgr5+ cell depletion revealed that the regenerative potential of the castrated adult prostate depends on Lgr5+ cells. Together, these data reveal insights into the cellular hierarchy of castration-resistant Lgr5+ cells, indicate a requirement for Lgr5+ cells during prostatic regeneration, and identify an Lgr5+ adult stem cell population in the prostate.

Citation

Wang, B., Wang, X., Long, J.E., Eastham-Anderson, J., Firestein, R., Junttila, M.R. "Castration-Resistant Lgr5+ Cells Are Long-Lived Stem Cells Required for Prostatic Regeneration" Stem Cell Reports (2015): 768–79