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- W2093933183 abstract "A typical clinical cis-diamminedichloroplatinum(II) (cisplatin) dosing regimen consists of repeated treatment cycles followed by a recovery period. While effective, this dosing structure results in a prolonged, often permanent, infertility in men. Spermatogonial stem cells (SSCs) are theoretically capable of repopulating the seminiferous tubules after exposure has ceased. We propose that an altered spermatogonial environment during recovery from the initial treatment cycle drives an increase in SSC mitotic cell activity, rendering the SSC pool increasingly susceptible to cisplatin-induced injury from subsequent cycles. To test this hypothesis, the undifferentiated spermatogonia population and niche of the adult mouse (C57/BL/6J) were examined during the recovery periods of a clinically-relevant cisplatin exposure paradigm. Histological examination revealed a disorganization of spermatogenesis correlating with the number of exposure cycles. Quantification of terminal deoxynucleotidyl transferase-mediated digoxigenin-dUTP nick end labeling (TUNEL) staining indicated an increase in apoptotic frequency following exposure. Immunohistochemical examination of Foxo1 and incorporated BrdU showed an increase in the undifferentiated spermatogonial population and mitotic activity in the recovery period in mice exposed to one cycle, but not two cycles of cisplatin. Immunohistochemical investigation of glial cell line-derived neurotrophic factor (GDNF) revealed an increase in production along the basal Sertoli cell membrane throughout the recovery period in all treatment groups. Taken together, these data establish that the impact of cisplatin exposure on the functional stem cell pool and niche correlates with: (1) the number of dosing cycles; (2) mitotic activity of early germ cells; and (3) alterations in the basal Sertoli cell GDNF expression levels after cisplatin-induced testicular injury." @default.
- W2093933183 created "2016-06-24" @default.
- W2093933183 creator A5005788391 @default.
- W2093933183 creator A5037145387 @default.
- W2093933183 date "2014-06-01" @default.
- W2093933183 modified "2023-09-28" @default.
- W2093933183 title "Cisplatin-induced alterations in the functional spermatogonial stem cell pool and niche in C57/BL/6J mice following a clinically relevant multi-cycle exposure" @default.
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- W2093933183 doi "https://doi.org/10.1016/j.toxlet.2014.03.019" @default.
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