title: Supplementation of fructose in chemically defined protein-free medium enhances the in vitro development of bovine transgenic cloned embryos.
abstract: The present study evaluated the possible embryotrophic role of fructose supplementation in chemically defined protein-free KSOM on in vitro development of bovine transgenic cloned embryos. Bovine fetal fibroblasts transfected with expression plasmids for bovine prion protein (PrP) mutant gene with GFP marker gene were used as donor nuclei for reconstruction of slaughterhouse-derived in vitro matured oocytes. The reconstructed oocytes were cultured in KSOM supplemented with 0.01% PVA (KSOM-PVA) at 39 degrees C in a humidified atmosphere of 5% CO2, 5% O2 and 90% N2 for 192 h. In Experiment 1, when reconstructed oocytes were cultured in KSOM-PVA supplemented with glucose (0.2 mM), fructose (1.5 mM) or combined glucose and fructose (0.2 and 1.5 mM, respectively), significantly (p < 0.05) higher blastocyst (19.2%) and hatching/hatched blastocyst (13.1%) formation rates were obtained in combined fructose and glucose supplemented medium than glucose supplemented counterpart (10.0% and 5.7%, respectively). In Experiment 2, when reconstructed oocytes were cultured in KSOM-PVA supplemented with 0.0, 0.2, 1.5, 3.0 and 5.6 mM fructose in combination with 0.2 mM glucose, the blastocyst formation rate was significantly higher (17.6%) in 1.5 mM fructose supplemented group than that of no fructose supplemented counterpart (9.7%; p > 0.05). In conclusion, supplementation of combined fructose (1.5 mM) and glucose (0.2 mM) in chemically defined protein-free KSOM enhances the in vitro development of bovine transgenic cloned embryos.
authors.affiliation: Department of Surgery and Obstetrics, Faculty of Veterinary Science, Bangladesh Agricultural University, Mymensingh 2202, Bangladesh. mmubhuiyan@hotmail.com
authors.forename: M M Uddin
authors.initials: MM
authors.lastname: Bhuiyan
authors.forename: S-K
authors.initials: SK
authors.lastname: Kang
authors.forename: B-C
authors.initials: BC
authors.lastname: Lee
mesh_terms: D000818:Animals; D030801:Animals, Genetically Modified / Q000196:embryology*; D001755:Blastocyst / Q000187:drug effects / Q000502:physiology; D002417:Cattle / Q000196:embryology*; D019976:Cloning, Organism; D016895:Culture Media, Serum-Free; D046149:Embryo Culture Techniques; D047108:Embryonic Development / Q000187:drug effects*; D005260:Female; D005307:Fertilization in Vitro; D005632:Fructose / Q000494:pharmacology*; D014162:Transfection
chemical_list: D016895:Culture Media, Serum-Free; D005632:Fructose