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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)

Involvement of nitric oxide and the ovarian blood follicle barrier in murine follicular cyst development.

OBJECTIVE: To test the involvement of nitric oxide in murine ovarian follicular cysts. DESIGN: Controlled animal study. SETTING: Academic research environment. ANIMAL(S): Immature female B6D2F1 mice at 23 +/- 2 days old.Ovarian cysts were induced by implanting miniosmotic pumps that delivered and maintained constant levels of hCG. Nitric oxide studies included the delivery of nitric oxide synthase (NOS) inhibitors, N(G)-nitro-L-arginine methyl ester (L-NAME), or N(G)-nitro-D-arginine methyl ester, by the same method.Ovulation assays measured cumulus oocyte complexes and blood follicle barrier (BFB) function. RESULT(S): Chronic treatment with hCG induced enlarged ovaries containing multiple follicular cysts, which were approximately double the size of follicles in sham-operated mice. These cysts enclosed few, if any granulosa cells, secreted high levels of testosterone, and had impaired ovarian BFB function. Inhibition of NOS by L-NAME during ovarian cyst formation reduced the size of follicular cysts, sustained normal testosterone levels, and maintained hormonal BFB reactivity in cystic follicles. CONCLUSION(S): Nitric oxide was found to be involved in the formation of hCG-induced murine follicular cysts and complications associated with these cysts were ameliorated by the NOS inhibitor L-NAME.[1]


  1. Involvement of nitric oxide and the ovarian blood follicle barrier in murine follicular cyst development. Nemade, R.V., Carrette, O., Larsen, W.J., Markoff, E. Fertil. Steril. (2002) [Pubmed]
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