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02229_2 SECRETORY COMPONENT IS DISTRIBUTED IN MOUSE PROSTATE EPITHELIA, AND UP-REGULATED BY TESTOSTERONE Cao, Xiaomei Secretory IgA (sIgA) is composed of polymer IgA (pIgA) and secretory component (SC). Distribution of SC in genital tracts has been widely investigated in many species (such as mouse, rat and human) by several groups. Their different distribution patterns have been observed in various species. Our previous study showed that the transport of sIgA from serum to secretory fluids in prostate glands of mice was up-regulated by testosterone treatment in orchiectomized mice (JI 156:1014, 1996). In order to understand the distribution of SC in male BALB/c mouse genital tract and whether testosterone influences the disribution, the expression of SC in the tract was detected by immunohistochemical technique. The specific distribution of SC was only observed in epithelia of prostate gland, but not in the other tissues of male genital tract. The reduced expression of SC in prostate was found in the orchiectomized mice, and the increased expression of SC was obviously observed in the protates of testosterone-treated mice. The results are consistent with our previous study on pIgA transport in mouse prostate, and suggested that testosterone may up-regulate the expression of SC in mouse prostate gland. Research Professor, Xiaomei Cao |
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