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Título: | Thyroxine treatment stimulated ovarian follicular angiogenesis in immature hypothyroid rats |
Fecha de publicación: | 2008 |
Editorial: | Murcia : F. Hernández |
ISSN: | 0213-3911 |
Materias relacionadas: | 618 - Ginecología. Obstetricia |
Palabras clave: | Thyroid hormone Ovarian follicle |
Resumen: | Summary. The development of mature ovarian follicles is greatly dependent on healthy thecal angiogenesis. Recent experimental evidence showed that thyroxine (T4) treatment promoted ovarian follicle development in immature hypothyroid (rdw) rats. However, an involvement of thyroid hormone in ovarian follicular angiogenesis has not yet been demonstrated. By morphological and molecular approaches, the present studies demonstrated that antral follicles in untreated, T4- or equine chorionic gonadotropin (eCG)-treated rdw rats were mainly small and/or atretic, and presented a poorly developed thecal microvasculature with ultrastructural evidence of diffuse quiescent or degenerative thin capillaries. However, T4 together with eCG increased the number of large antral and mature follicles with numerous activated capillaries and ultra-structural evidence of rich and diffuse angiogenesis in the theca layer. While T4 alone significantly increased mRNA expression of vascular endothelial growth factor (VEGF) and tumor necrosis factor alpha (TNFα), it decreased that of fetal liver kinase compared with those in the untreated group. Combined treatment of T4 and eCG markedly increased mRNA abundance of not only VEGF and TNFα, but also basic fibroblast growth factor. These data suggest that T4 may promote ovarian follicular angiogenesis in rdw rats by up-regulating mRNA expression of major angiogenic factors. |
Autor/es principal/es: | Jin-Yi Jiang Kanako Miyabayashi Stefania A. Nottola Motoaki Umezu Sandra Cecconi Eimei Sato Guido Macchiarelli |
Forma parte de: | Histology and histopathology |
URI: | http://hdl.handle.net/10201/29725 |
Tipo de documento: | info:eu-repo/semantics/article |
Número páginas / Extensión: | 12 |
Derechos: | info:eu-repo/semantics/openAccess |
Aparece en las colecciones: | Vol.23,nº11 (2008) |
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Thyroxine treatment stimulated ovarian follicular angiogenesis in immature hypothyroid rats.pdf | 2,76 MB | Adobe PDF | Visualizar/Abrir |
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