Development of fresh and vitrified agouti ovarian tissue after xenografting to ovariectomised severe combined immunodeficiency (SCID) mice
Érica C. G. Praxedes A , Gabriela L. Lima B , Luana G. P. Bezerra A , Fernanda A. Santos C , Marcelo B. Bezerra C , Denise D. Guerreiro D , Ana P. R. Rodrigues D , Sheyla F. S. Domingues E and Alexandre R. Silva A F
+ Author Affiliations
- Author Affiliations
A Laboratory of Animal Germplasm Conservation, Universidade Federal Rural do Semi-Árido, BR 110, Km 47, Costa e Silva, 59625-900, Mossoró, RN, Brazil.
B Department of Animal Sciences, Instituto Federal de Educação, Ciência e Tecnologia do Ceará (IFCE), CE-292, KM 15, Gisélia Pinheiro, 63115-500, Crato-CE, Brazil.
C Laboratory of Gonadal Transplantation and In vitro Embryo Production, Universidade Federal Rural do Semi-Árido, BR 110, Km 47, Costa e Silva, 59625-900, Mossoró, RN, Brazil.
D Laboratory of Manipulation of Oocytes and Preantral Follicles (LAMOFOPA), Faculdade de Veterinária, Universidade do Ceará, Av. Paranjana 1700, Campus do Itaperi, 60714-903, Fortaleza, CE, Brazil.
E Laboratory of Amazon Wild Animals Biology and Medicine, Universidade Federal do Pará, Jaderlândia, 68746-360, Castanhal, PA, Brazil.
F Corresponding author. Email: legio2000@yahoo.com
Reproduction, Fertility and Development 30(3) 459-468 https://doi.org/10.1071/RD17051
Submitted: 9 February 2017 Accepted: 12 July 2017 Published: 8 August 2017
Abstract
The aim of the present study was to evaluate the development of fresh and vitrified agouti ovarian tissue after xenografting to C57Bl/6 severe combined immunodeficiency (SCID) female mice. Ovaries were obtained from five female agoutis and divided into 16 fragments. Five fragments were transplanted immediately to ovariectomised SCID mice and the others were vitrified, stored for 2 weeks and transplanted only after rewarming. Tissue fragments were transplanted under the kidney capsule in recipients. The return of ovarian activity in recipients was monitored by the observation of external signs of oestrus and vaginal cytology over a period of 40 days after transplantation, after which the grafts were removed and evaluated for morphology, cell proliferation and the occurrence of DNA fragmentation. Ovarian activity returned in four of five mice that received fresh ovarian tissue from agoutis and in one of six mice that had received vitrified tissue a mean (± s.e.m.) 20.6 ± 8.6 days after xenotransplantation. After graft removal, a predominance of primordial and primary follicles was observed in all grafts. Vitrification reduced cell proliferation and increased the occurrence of DNA fragmentation in grafted agouti ovarian tissue. In conclusion, the present study demonstrates that xenografted agouti ovarian tissue, fresh or vitrified, is able to promote the return of ovarian activity in ovariectomised SCID C57B1/6 mice. However, improvements to vitrification protocols for agouti ovarian tissue are necessary.
Additional keywords: hystricognath, preantral follicles, rodent, wildlife, xenotransplantation.
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