title: Addition of erythrocytes to in vitro culture medium attenuates the detrimental effects of reactive oxygen species on bovine preimplantation embryo development.
abstract: Erythrocytes were recently found to improve the early development of mice embryos by their antioxidant effect. The purpose of the present study was to examine the effect of erythrocytes on the in vitro development of bovine in vitro fertilized (IVF) embryos in medium supplemented with reactive oxygen species (ROS). IVF embryos were cultured in CR1aa medium supplemented with oxidizing agents, 0.5mmol/L hypoxanthine and 0.01U/mL xanthine oxidase (HX/XOD), in the presence and absence of erythrocytes (5×10(4) , 5×10(5) , 5×10(6) and 5×10(7) erythrocytes/mL). After 8 days, blastocysts were examined with a stereomicroscope. HX/XOD blocked development to the blastocyst stage (HX/XOD: 0%, control: 33%), but in the presence of both erythrocytes and HX/XOD, blastocyst development was restored to about one-third to two-thirds the normal rate (5×10(5) to 5×10(7) erythrocytes/mL: 12 to 23%). Furthermore, adding erythrocytes or erythrocyte hemolysate to medium without HX/XOD increased the blastocyst rate. These results suggest that the addition of erythrocytes can attenuate the detrimental effects of ROS on embryo development in bovine species as well as in mice.
authors.affiliation: Zen-noh Embryo Transfer Center, Kamishihoro, Hokkaido, Japan. ideta-atsushi@zennoh.or.jp
authors.forename: Atsushi
authors.initials: A
authors.lastname: Ideta
authors.forename: Kanami
authors.initials: K
authors.lastname: Tsuchiya
authors.forename: Yoshito
authors.initials: Y
authors.lastname: Aoyagi
mesh_terms: D000818:Animals; D000975:Antioxidants; D001755:Blastocyst / Q000187:drug effects / Q000502:physiology*; D002417:Cattle; D002478:Cells, Cultured; D003470:Culture Media; D004622:Embryo, Mammalian; D047108:Embryonic Development / Q000187:drug effects / Q000502:physiology*; D004912:Erythrocytes / Q000502:physiology*; D005307:Fertilization in Vitro; D019271:Hypoxanthine / Q000009:adverse effects; D066298:In Vitro Techniques; D051379:Mice; D016877:Oxidants / Q000009:adverse effects; D017382:Reactive Oxygen Species / Q000009:adverse effects*; D013482:Superoxide Dismutase / Q000378:metabolism; D014969:Xanthine Oxidase / Q000009:adverse effects
chemical_list: D000975:Antioxidants; D003470:Culture Media; D016877:Oxidants; D017382:Reactive Oxygen Species; D019271:Hypoxanthine; D013482:Superoxide Dismutase; D014969:Xanthine Oxidase