In humans, the dorsal acini of the BG (DBG) are negative to PAS reaction (Katz & Merzel, 1977), but most acini are PAS positive in the ventral BG (VBG) and in all JG.
Staining positivity was evaluated in 6 histological structures: JG, VBG, DBG, VNO neuroepithelium (Ne), VNO receptor-free epithelium (RE) and nasal septum respiratory epithelium (NRE) for all three techniques used.
The pattern we found in DBG is similar to what was found in humans (Roslinski et al.) but has not been reported for rats previously.
The uneven distribution of AR in BGs suggests regional specialization, with VBGs situated closer to the VNO being similar to JG and different in AR sensitivity to DBG, whose sensitivity to androgens seems to be very slight if any at all.