Characterization of long-term ex vivo expansion of tree shrew spermatogonial stem cells
Purpose: The goals of this study are to clarify influence of long-term expansion on the spermatogenesis potential of tree shrew spermatogonial stem cells (SSCs) Overall design: Transcriptome comparation of tree shrew SSCs at the passage of 17, 26, 41 and 53. Assessment the role of nicotinamide ribose  in treated or untreated tree shrew SSCs