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- W2128128607 abstract "The aim of this study was to optimise porcine in vitro fertilisation (IVF) with cryopreserved semen with the exploitation of the oviduct secretion. The oocytes were cultured in NCSU37 supplemented with db-cAMP (1 mM), porcine follicular fluid (pFF; 10%), cysteine (0.1 mg/ml) and beta-mercaptoethanol (25 microM) for 44 h (the first 20 h with 10 IU/ml hCG and PMSG). The oviductal epithelial cells (OEC) were cultured in TCM-199 medium (with 10% FCS, 0.2 mM pyruvate and 50 microg/ml gentamicin) for 48 h. To determine the effects of OEC and conditioned medium, oocytes were separated into five groups for the last 3 h of maturation and placed in: fresh maturation medium (controls), OEC-cNCSU with OEC in the maturation medium for 24 h; OEC-fNUSU with fresh OEC in maturation medium; cTCM with TCM-199 conditioned with OEC for 48 h; or fTCM with fresh TCM-199. Results indicate that OEC-cNCSU and OEC-fNCSU increase the number of oocytes reaching the two pronucleus (2PN) stage (p < 0.01) and decrease the polyspermy rate (p < 0.01) compared with controls. The rates are significantly lower than controls when cTCM and fTCM were used (p < 0.01). As regards blastocyst rates, an increase was observed in the OEC-cNCSU and cTCM groups (p < 0.05). For the second experiment, spermatozoa were incubated with OEC in IVF medium (mTBM medium supplemented with 0.1% BSA) without caffeine for 4 h prior to IVF. Results indicate that sperm treatment with OEC increases the 2PN rate (p < 0.01) compared with controls and reduces the polyspermy rate (p < 0.01). In conclusion, our study shows that co-incubation of OEC with both oocytes and sperm before IVF reduces polyspermy rates and improves embryo development." @default.
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- W2128128607 date "2000-05-01" @default.
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- W2128128607 title "Influence of oviductal cells and conditioned medium on porcine gametes" @default.
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- W2128128607 doi "https://doi.org/10.1017/s0967199400000915" @default.
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