Male rats without salivary glands stop producing male hormones for some time
Scientists completely removed the parotid, submandibular and sublingual salivary glands in sexually mature male rats. This group of animals was compared to those who underwent a «false operation», and those who were not touched by the researcher’s scalpel at all.
It turned out that the Leydig cells changed in the rats which were operated on — these cells affect the formation of the genital organs in rats, regulate the production of germ cells, the development of secondary sexual characteristics and sexual behaviour. Scientists noted that changes in the cells mean that the testosterone production in the rats has decreased.
By the sixth week after the operation, structural changes in the Leydig cells were completely reversed, i.e. the cells returned to the previous level of synthesis of male sex hormones.