Sex steroids modulate morphological and functional features of the bovine oviduct

Autor(es)

Gonella-Diaza, Angela Maria ^[1] ; Mesquita, Fernando Silveira ^[2] ; da Silva, Kaue Ribeiro ^[1] ; de Carvalho Balieiro, Julio Cesar ^[1] ; dos Santos, Nilton Pedro ^[3] ; Pugliesi, Guilherme ^[3] ; Strefezzi, Ricardo de Francisco ^[3] ; Binelli, Mario ^[1]

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Fac Med Vet & Zootecnia, Sao Paulo - Brazil

^[2] Univ Fed Pampa, Curso Med Vet, Uruguaiana, RS - Brazil

^[3] Univ Sao Paulo, Fac Zootecnia & Engn Alimentos, Sao Paulo - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Cell and Tissue Research; v. 370, n. 2, p. 319-333, NOV 2017.
• Citações Web of Science: 7

Resumo

In cattle, the oviduct plays a major role in the reproductive process; however, molecular control of oviduct receptivity to the embryo is poorly understood. A model for receptivity based on size of the pre-ovulatory follicle (POF) was used to compare oviductal morphology, cellular proliferation, and candidate transcript abundance. Growth of the POF of Nelore (Bos indicus) cows was manipulated to produce two groups: a large POF-large corpus luteum (CL) group (LF-LCL; greater receptivity) and a small POF-small CL group (SF-SCL). Samples of the ampulla and isthmus ipsilateral and contralateral to CL were collected 4 days after GnRH-induced ovulation. Tissues were either embedded in paraffin for Harris-Hematoxylin and Eosin and periodic acid-Schiff staining and KI67 immunostaining, followed by morphological analyses, or stored at -80 degrees C for RNA extraction, cDNA synthesis, and qPCR analyses. The effects of group (LF-LCL and SF-SCL), region (ampulla and isthmus), and side (ipsilateral and contralateral) were analyzed using three-way nested ANOVA. The ipsilateral ampulla of the LF-LCL group presented more primary mucosal folds, a greater mucosal-folding grade and luminal perimeter, and more secretory cells and proliferating cells when compared with the ampulla of the SF-SCL group and with the contralateral ampulla of both groups. There were no morphological differences in the isthmus between groups and sides. Changes in transcript abundance are suggestive of LF-LCL-stimulated secretory activity. In summary, ovulation of a larger POF generates a periovulatory endocrine milieu that modulates morphological and functional features of the bovine oviduct which may support embryo survival and development. (AU)

• Processo FAPESP: 11/03226-4 - Assinaturas da receptividade
• Beneficiário: Mario Binelli
• Modalidade de apoio: Auxílio à Pesquisa - Temático