Concentrations of myo-inositol in the luminal fluid of the mammalian testis and epididymis.

The concentration of free myo-inositol was measured in the luminal fluid removed by micropuncture from the testis and epididymis of rat, hamster, rabbit, rhesus monkey, baboon, ram and boar. The highest concentration (mM) was found in the epididymal luminal fluid from the cauda epididymidis of the hamster (90) and the rat (50), and the lowest was seen in the rabbit (< 0.5), and boar (1.0-1.2), whilst the rhesus monkey (17), the baboon (1.3) and the ram (0.9-5.9) were intermediate. The species also differed with respect to the changes in luminal inositol coicentration along the epididymis.