title: Interactions of indole acetic acid with EGF and FSH in the culture of ovine preantral follicles.
abstract: The mechanisms that regulate the gradual exit of ovarian follicles from the non-growing, primordial pool are very poorly understood. The objective of this study was to evaluate the effects of adding indole acetic acid (IAA), epidermal growth factor (EGF) and follicle stimulating hormone (FSH) to the media for in vitro culture of ovine ovarian fragments and determine their effects on growth activation and viability of preantral follicles. The ovarian cortex was divided into small fragments; one fragment was immediately fixed in Bouin (control). The other fragments were cultured for 2 or 6 days in culture plates with: minimum essential medium (MEM) supplemented with insulin-transferrin-selenium (ITS), pyruvate, glutamine, hypoxantine, bovine serum albumine and antibiotics (MEM+); MEM+ plus IAA (40 ng/mL); MEM+ plus EGF (100 ng/mL); MEM+ plus FSH (100 ng/mL); MEM+ plus IAA+EGF; MEM+ plus IAA+FSH; MEM+ plus EGF+FSH; or MEM+ plus IAA+EGF+FSH. After 2 or 6 days of culture in each treatment, the pieces of ovarian cortex were fixed in Bouin for histological examination. Follicles were classified as primordial or developing (primary and secondary) follicles. Compared to the control, in all media tested, the percentages of primordial follicles were reduced (P<0.05) and the percentages of developing follicles were increased (P<0.05) after 2 or 6 days of culture. Furthermore, culture of ovarian cortex for 6 days reduced the percentages of healthy, viable follicles when compared with the control (P<0.05), except for cultures supplemented with IAA+EGF and EGF+FSH. In conclusion, the addition of IAA and EGF or EGF and FSH to the culture media were the most effective treatments to sustain the health and viability of activated ovine primordial follicles during in vitro culture.
authors.affiliation: Faculty of Veterinary Medicine, PPGCV, State University of Ceará, Fortaleza, CE, Brazil. evelyn_andrade@yahoo.com
authors.forename: Evelyn Rabelo
authors.initials: ER
authors.lastname: Andrade
authors.forename: Marcelo
authors.initials: M
authors.lastname: Marcondes Seneda
authors.forename: Amauri Alcindo
authors.initials: AA
authors.lastname: Alfieri
authors.forename: João Ademir
authors.initials: JA
authors.lastname: de Oliveira
authors.forename: Ana Paula
authors.initials: AP
authors.lastname: Frederico Rodrigues Loureiro Bracarense
authors.forename: José Ricardo
authors.initials: JR
authors.lastname: Figueiredo
authors.forename: Ricardo
authors.initials: R
authors.lastname: Toniolli
mesh_terms: D000818:Animals; D003470:Culture Media; D004347:Drug Interactions; D004815:Epidermal Growth Factor / Q000008:administration & dosage*; D005260:Female; D005640:Follicle Stimulating Hormone / Q000008:administration & dosage*; D007210:Indoleacetic Acids / Q000008:administration & dosage*; D006080:Ovarian Follicle / Q000187:drug effects* / Q000502:physiology*; D012756:Sheep; D046509:Tissue Culture Techniques
chemical_list: D003470:Culture Media; D007210:Indoleacetic Acids; D004815:Epidermal Growth Factor; C030737:indoleacetic acid; D005640:Follicle Stimulating Hormone