Figure 1

Localisation of p97/VCP and Jab1/CSN5 in the developing rat testis. Immunohistochemistry was used to show the cellular localisation of p97/VCP and Jab1/CSN5 in the testis at days 5 (A, G), 15 (B, H), 30 (C, D, I), and 60 (E, F, J, K, L) after birth. The negative controls (A, C, G, H, L, inserts). A: Positive staining of p97/VCP expression was demonstrated in the nuclear and cytoplasmic regions of gonocytes (GC) at day 5. Interstitial cells (I) show weak immunoreactivity, and peritubuler cells (P) present no immunoreactivity. B: p97/VCP is highly expressed in spermatogonia (Sg), spermatocytes (Sc) and Sertoli cells (Se) at day 15. Some I show moderate immunostaining for p97/VCP. C, D: Elongating (eSt) and round (rSt) spermatids, Se and Sg show moderate to strong immunostaining for p97/VCP, while cytoplasm of Sc are moderately labelled with p97/VCP. E, F: In the adult testis, p97/VCP is weakly to moderately expressed in the cytoplasm of Sc, whereas Se, Sg, rSt and eSt are moderate to strong immunopositive for p97/VCP. G: Moderate Jab1/CSN5 expression is seen at day 5 in GC. H: Jab1/CSN5 is strongly expressed in Sg and Sc while Se exhibit moderate expression at day 15. I: Sg, Sc, eSt and Se show moderate to strong immunostaining for Jab1/CSN5. J-L: In the adult testis, Jab1/CSN5 is strongly expressed in Sg and Sc, while rSt and eSt show weak to moderate immunostaining for Jab1/CSN5. Roman numerals indicate stages of the seminiferous epithelial cycle. M: H-SCORE of the p97/VCP and Jab1/CSN5 immunostaining intensities in the developing rat testis. The data are represented as the means ± SEM. a: p < 0.05, day 5 vs. days 15, 30 and 60, b: day 15 vs. day 5 and day 30, c: day 30 vs. days 5 and 15. Scale bars: 50 μm.