[Immunocytochemical localization of estrogen receptor in the spermatogenesis of termites]

The available information indicates that estrogen receptor(ER) play a physiological role in the regulation of spermatogenesis in vertebrates. However, the cellular distribution of ER in the testis is poorly understood in invertebrates. The aim of this study was to determine the presence and cellular distribution of ER in the spermatogenesis of termite (Reticulitermes aculabialis). Immunocytochemical analysis showed ER was present in the nucleus of the primary spermatocytes, and the expression of ER was relatively stronger in the primary spermatocytes of the swarming termites. Previous studies have demonstrated the procerebrum of the swarming male termites could strongly secrete FSH (Follicle Stimulating Hormone) and LH (Luteinizing Hormone) which stimulated estrogen secreting. In conclusion, we demonstrated here for the first time that ER might be an important factor in the regulation of the spermatogenesis of termites, and play an important role for starting and maintaining the meiosis cell division of spermatocytes.