TY - JOUR
T1 - Differential influence of ampullary and isthmic derived epithelial cells on zona pellucida hardening and in vitro fertilization in ovine
AU - Dadashpour Davachi, Navid
AU - Zare Shahneh, Ahmad
AU - Kohram, Hamid
AU - Zhandi, Mahdi
AU - Shamsi, Helia
AU - Hajiyavand, Amir M.
AU - Saadat, Mozafar
PY - 2016/3/1
Y1 - 2016/3/1
N2 - The central role of the oviduct, as the site of zona pellucida (ZP) maturation, fertilization and early embryogenesis, has been recognized. The objective of this study was to investigate whether ampullary and isthmic derived epithelial cells have different effects on in vitro ZP hardening, in vitro fertilization (IVF) and in vitro culture (IVC) of the resulting embryos. Cumulus oocyte complexes (COCs) were matured in a coculture system with ampullary/isthmic epithelial cells, TCM199 supplemented with insulin-like growth factor I (IGF-I) and epithelial derived growth factor (EGF) (GF treated group), conditioned media produced using ampullary (ACM), isthmic (ICM), COCs + ampullary, and COCs + isthmic epithelial cells, contactless culture system, oviductal fluid, GF + ACM/ICM, and drops of TCM199 (control), for 24 h. The matured oocytes were randomly divided into two groups: Group I was subjected to ZP digestion; Group II underwent IVF. The duration of the ZP digestion, in a coculture system with ampullary epithelial cells (AE) was significantly increased (p < 0.05), compared with other groups. Penetrated oocytes and monospermic fertilization were significantly increased (p < 0.05) in the AE group. The mean number of spermatozoa per penetrated oocyte was reduced dramatically for the AE group (p < 0.05). A significant increase (p < 0.05) in the embryo development was observed in all treated groups, compared to the control. Results revealed that epithelial cells harvested from the ampullary segment of the oviduct had in vitro specialized role in ZP hardening and have subsequent IVF and IVC outcomes.
AB - The central role of the oviduct, as the site of zona pellucida (ZP) maturation, fertilization and early embryogenesis, has been recognized. The objective of this study was to investigate whether ampullary and isthmic derived epithelial cells have different effects on in vitro ZP hardening, in vitro fertilization (IVF) and in vitro culture (IVC) of the resulting embryos. Cumulus oocyte complexes (COCs) were matured in a coculture system with ampullary/isthmic epithelial cells, TCM199 supplemented with insulin-like growth factor I (IGF-I) and epithelial derived growth factor (EGF) (GF treated group), conditioned media produced using ampullary (ACM), isthmic (ICM), COCs + ampullary, and COCs + isthmic epithelial cells, contactless culture system, oviductal fluid, GF + ACM/ICM, and drops of TCM199 (control), for 24 h. The matured oocytes were randomly divided into two groups: Group I was subjected to ZP digestion; Group II underwent IVF. The duration of the ZP digestion, in a coculture system with ampullary epithelial cells (AE) was significantly increased (p < 0.05), compared with other groups. Penetrated oocytes and monospermic fertilization were significantly increased (p < 0.05) in the AE group. The mean number of spermatozoa per penetrated oocyte was reduced dramatically for the AE group (p < 0.05). A significant increase (p < 0.05) in the embryo development was observed in all treated groups, compared to the control. Results revealed that epithelial cells harvested from the ampullary segment of the oviduct had in vitro specialized role in ZP hardening and have subsequent IVF and IVC outcomes.
KW - Coculture techniques
KW - In vitro fertilization
KW - In vitro oocyte maturation
KW - Oviducts
KW - Zona pellucida
UR - http://www.scopus.com/inward/record.url?scp=84959482809&partnerID=8YFLogxK
U2 - 10.1016/j.repbio.2015.11.002
DO - 10.1016/j.repbio.2015.11.002
M3 - Article
C2 - 26952755
AN - SCOPUS:84959482809
SN - 1642-431X
VL - 16
SP - 61
EP - 69
JO - Reproductive biology
JF - Reproductive biology
IS - 1
ER -