Immunohistochemical analysis of cAMP response element-binding protein in mouse testis during postnatal development and spermatogenesis.
Basal activity and cellular localization of cAMP response element-binding protein (CREB) was examined in mouse testis during postnatal development and spermatogenesis. Testes of ICR mice sampled on postnatal day (PND) 3, 7, 14, 21, 28, 35, 42, and 49 were analyzed using Western blotting. Basal CREB activity was significantly higher in early phase (PND 3-7) developing testes than in intermediate- and late-phase developing (PND 14-42) and adult testes (PND 49). Furthermore, immunohistochemical analysis demonstrated the change of CREB phosphorylation in various testicular cell types during postnatal development. In particular, CREB phosphorylation in seminiferous tubules of the adult testis varied according to the spermatogenic cycle, while phosphorylation was evident in spermatogonia during all stages. Phosphorylation was moderate in pachytene spermatocytes of stages I-III and intense in round and elongate spermatids of spermiogenesis in stages XII-IX. These results suggest that CREB plays an important role in cell proliferation and differentiation in the early phase of postnatal development and spermatogenesis of mouse testis.
Kim
Joong-Sun
JS
Department of Veterinary Anatomy, College of Veterinary Medicine and Animal Medical Institute, Chonnam National University, Gwangju 500-757, South Korea.
Song
Myoung-Sub
MS
Seo
Heung-Sik
HS
Yang
Miyoung
M
Kim
Sung-Ho
SH
Kim
Jong Choon
JC
Kim
Heechul
H
Saito
Toru R
TR
Shin
Taekyun
T
Moon
Changjong
C
D000818:Animals; D017362:Cyclic AMP Response Element-Binding Protein / Q000378:metabolism*; D007150:Immunohistochemistry; D008297:Male; D051379:Mice; D008813:Mice, Inbred ICR; D010766:Phosphorylation; D012708:Sertoli Cells / Q000166:cytology / Q000378:metabolism; D013087:Spermatids / Q000166:cytology / Q000254:growth & development / Q000378:metabolism; D013090:Spermatocytes / Q000166:cytology / Q000254:growth & development / Q000378:metabolism; D013091:Spermatogenesis / Q000502:physiology*; D013093:Spermatogonia / Q000166:cytology / Q000254:growth & development / Q000378:metabolism; D013737:Testis / Q000166:cytology / Q000254:growth & development / Q000502:physiology*
D017362:Cyclic AMP Response Element-Binding Protein