Androgen Receptors Expression in Pituitary of Male Viscacha in relation to Growth and Reproductive Cycle

Figure 4

Seasonal expression of AR in pituitary during the reproductive cycle of adult viscachas. ((A)–(E)) Reproductive period. ((A), (B)) Images of caudal end; the AR were expressed mainly in the nuclei of PD cells (arrows). ((C), (D), and (E)) AR expression at the rostral end, ventral region, and dorsal region, respectively. The arrowhead indicated a cell with cytoplasmic labeling for AR. ((F), (G)) A few AR-ir cells at caudal end during the gonadal regression period. ((H), (I)) AR-ir cells at caudal end during the gonadal recovery period. Caudal end, ce; blood vessels, v; follicular structures, f. ((A), (F), and (H)) Scale bar 100 μm. ((B), (C), (D), (E), (G), and (I)) Scale bar 25 μm. Images counterstaining with hematoxylin.