title: Expression profiles of extracellular superoxide dismutase during mouse organogenesis.
abstract: Although extracellular superoxide dismutase (EC-SOD), which scavenges the superoxide anion in extracellular spaces, has previously been implicated in the prenatal pulmonary response to oxidative stress in the developing lungs, little is currently known regarding the schematic expression pattern and the roles played by EC-SOD during embryogenesis. In an effort to characterize the pattern of EC-SOD expression during mouse organogenesis, quantitative RT-PCR, Western blotting, and in situ hybridization analyses were conducted in mouse embryos and extraembryonic tissues including placenta on embryonic days (Eds) 7.5-18.5. EC-SOD mRNA and protein were expressed in all the embryos and extraembryonic tissues examined. The mRNA level was higher in the embryos than the extraembryonic tissues on Eds 7.5-10.5, but after Ed 13.5, it evidenced an increasing pattern in the extraembryonic tissues. EC-SOD immunoreactivity also increased in the extraembryonic tissues after Ed 13.5. During organogenesis, EC-SOD mRNA was expressed principally in the ectoplacental cone, amnion, and neural ectoderm on Ed 7.5 and in the neural folds and primitive streak on Ed 8.5. On Eds 9.5-12.5, EC-SOD mRNA was expressed abundantly in the nervous tissues and forelimb and hindlimb buds. On Eds 13.5-18.5, EC-SOD mRNA was observed at high levels in the airway epithelium of lung, liver, the intestinal epithelium, skin, vibrissae, the metanephric corpuscle of kidney, the nasal cavity, and the labyrinth trophoblast, spongiotrophoblast, and blood cells in placenta. Our overall results indicate that EC-SOD is expressed spatiotemporally in developing embryos and surrounding extraembryonic tissues during mouse organogenesis, thus suggesting that EC-SOD may be relevant to organogenesis, playing the role of an antioxidant enzyme against endogenous and exogenous oxygen stresses.
authors.affiliation: College of Veterinary Medicine and Research Institute of Veterinary Medicine, Chungbuk National University, Cheongju 361-763, Republic of Korea.
authors.forename: Mi-Ra
authors.initials: MR
authors.lastname: Kim
authors.forename: Jung-Min
authors.initials: JM
authors.lastname: Yon
authors.forename: Se-Ra
authors.initials: SR
authors.lastname: Lee
authors.forename: In-Jeoung
authors.initials: IJ
authors.lastname: Baek
authors.forename: Jong-Soo
authors.initials: JS
authors.lastname: Kim
authors.forename: Jin Tae
authors.initials: JT
authors.lastname: Hong
authors.forename: Beom Jun
authors.initials: BJ
authors.lastname: Lee
authors.forename: Young Won
authors.initials: YW
authors.lastname: Yun
authors.forename: Sang-Yoon
authors.initials: SY
authors.lastname: Nam
mesh_terms: D000650:Amnion / Q000378:metabolism; D000818:Animals; D002490:Central Nervous System / Q000196:embryology / Q000378:metabolism; D003656:Decidua / Q000166:cytology / Q000378:metabolism; D004475:Ectoderm / Q000378:metabolism; D005260:Female; D005552:Forelimb / Q000196:embryology / Q000378:metabolism; D018507:Gene Expression Regulation, Developmental; D017403:In Situ Hybridization; D007668:Kidney / Q000196:embryology / Q000378:metabolism; D018878:Limb Buds / Q000378:metabolism; D008297:Male; D051379:Mice; D008813:Mice, Inbred ICR; D009432:Neural Crest / Q000378:metabolism; D009928:Organ Specificity; D038081:Organogenesis; D010920:Placenta / Q000033:anatomy & histology / Q000098:blood supply / Q000378:metabolism; D011247:Pregnancy; D054240:Primitive Streak / Q000378:metabolism; D012137:Respiratory System / Q000196:embryology / Q000378:metabolism; D013482:Superoxide Dismutase / Q000235:genetics* / Q000378:metabolism; D014158:Transcription, Genetic; D014327:Trophoblasts / Q000378:metabolism
chemical_list: C499090:Sod3 protein, mouse; D013482:Superoxide Dismutase