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. 2023 Mar 17;14:1112834. doi: 10.3389/fendo.2023.1112834

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Copyright © 2023 Dumont, Lopez Maestre, Chalmel, Huber, Rives-Feraille, Moutard, Bateux, Rondanino and Rives

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Assessment of the maturation of testicular tissue at key stages of the first spermatogenic wave. (A) Correlation map representing all biological samples conditions and repetitions. Each row corresponds to the mean of biological replicate samples: in vivo 6.5 (fresh: n=3; CSF: n=2), 10.5 (n=3), 22.5 (n=3), 36.5 (n=2) dpp; in vitro D4 (n=3), D16 (n=2), and D30 (fresh tissue: n=3; CSF: n=1). A kinetic evolution curve of the transcriptome of maturing testicular tissues is represented in dotted purple arrow. (B) Principal component analysis (PCA). Representation of the clusters on the map of the gene expression dataset are plotted by the first two principal components (PC) PC1 (94% variance) and PC2 (5% variance). The position of individual samples is indicated in the PCA individual factor map by colored spots which indicate in vivo testicular tissues controls (▲) and in vitro explants (●) cultured from fresh or frozen tissues. Five separate clusters of samples are represented with ellipse delimitations. CSF, controlled slow freezing; dpp, days postpartum.