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Prolonged expression of senescence markers in mice exposed to gamma-irradiation
Min-A Seol, Uhee Jung*, Hyeon Soo Eom, Seol-Hwa Kim, Hae-Ran Park, Sung-Kee Jo 대한수의학회 Journal of Veterinary Science 8 Pages
대한수의학회 Journal of Veterinary Science 2012, 제 13권 제 4호 1 331-338 (8 pages)
Although ionizing radiation is known to induce cellular senescence in vitro and in vivo, its long-term in vivo effects are not well defined. In this study, we examined the prolonged expression of senescence markers in mice irradiated with single or fractionated doses. C57BL/6 female mice were exposed to 5 Gy of γ-rays in single or 5, 10, 25 fractions. At 2, 4, and 6 months after irradiation, senescence markers including mitochondrial DNA (mtDNA) common deletion, p21, and senescence-associated... -
Fast neutron irradiation deteriorates hippocampus-related memory ability in adult mice
Miyoung Yang, Hwanseong Kim, Juhwan Kim, Sung-Ho Kim, Jong-Choon Kim, Chun-Sik Bae, Joong-Sun Kim, Taekyun Shin, Changjong Moon* 대한수의학회 Journal of Veterinary Science 6 Pages
대한수의학회 Journal of Veterinary Science 2012, 제 13권 제 1호 1 1-6 (6 pages)
In the object recognition memory test and contextual fear conditioning, mice trained 1 and 7 days after irradiation displayed significant memory deficits compared to the sham-irradiated controls. The number of Ki-67- and DCX-positive cells decreased significantly 24 h post-irradiation. These results indicate that acute exposure of the adult mouse brain to a relatively low dose of fast neutrons interrupts hippocampal functions, including learning and memory, possibly by inhibiting neurogenesis. -
Cytotoxicity of gamma-ray in rat immature hippocampal neurons
Miyoung Yang, Myoung-Sub Song, Sung-Ho Kim, Jong-Choon Kim, Joong-Sun Kim, Taekyun Shin, Changjong Moon* 대한수의학회 Journal of Veterinary Science 5 Pages
대한수의학회 Journal of Veterinary Science 2011, 제 12권 제 3호 1 203-207 (5 pages)
This in vitro study evaluated the detrimental effect of acute gamma (g)-irradiation on rat immature hippocampal neurons. Rat immature hippocampal neurons (0.5 day in vitro) were irradiated with 0∼4 Gy g-rays. Cytotoxicity was analyzed using a lactate dehydrogenase release assay at 24 h after g-irradiation. Radiation-induced cytotoxicity in immature hippocampal neurons increased in a dose- dependent manner. Pre-treatments of pro-apoptotic caspase inhibitors and anti-oxidative substances... -
Phytotherapeutic effects of Echinacea purpurea in gamma-irradiated mice
Amira M. K. Abouelella, Yasser E. Shahein*, Sameh S. Tawfik, Ahmed M. Zahran 대한수의학회 Journal of Veterinary Science 12 Pages
대한수의학회 Journal of Veterinary Science 2007, 제 8권 제 4호 5 341-352 (12 pages)
a dose of 30 mg/kg body weight for 2 weeks before and after irradiation with 3 Gy of ■-rays. The results reflected the detrimental reduction effects of ■-rays on peripheral blood hemoglobin and the levels of red blood cells, differential white blood cells, and bone marrow cells. The thiobarbituric acid-reactive substances (TBARs) level, Superoxide dismutase (SOD) and glutathione peroxidase (GSPx) activities and DNA fragmentation were also investigated. FT-Raman spectroscopy was used to explore... -
Relative biological effectiveness of fast neutrons for apoptosis in mouse hair follicles
Hae-June Lee, Sung-Ho Kim* 대한수의학회 Journal of Veterinary Science 6 Pages
대한수의학회 Journal of Veterinary Science 2007, 제 8권 제 4호 4 335-340 (6 pages)
h after irradiation. The dose-response curves were analyzed using the best-fit curve model. The dose-response curves were linear-quadratic, and a significant relationship was found between the frequency of apoptotic cells and the dose. The morphological findings in the irradiated groups were typical apoptotic fragments in the matrix region of the hair follicle, but the spontaneous existence of apoptotic fragments was rarely observed in the control group. In the presence of an apoptosis frequency... -
Increased phosphorylation of caveolin-1 in the spinal cord of irradiated rats
Heechul Kim, Changjong Moon, Jeongtae Kim, Meejung Ahn, Jin Won Hyun, Jae Woo Park, Sung-Ho Kim, Seungjoon Kim, Taekyun Shin* 대한수의학회 Journal of Veterinary Science 6 Pages
대한수의학회 Journal of Veterinary Science 2007, 제 8권 제 4호 2 323-328 (6 pages)
of activated microglia/macrophages, was matched with that of p-caveolin-1. In the irradiated spinal cords, there was a higher level of p-caveolin-1 immunoreactivity in the isolectin B4-positive microglial, ependymal, and vascular endothelial cells, in which p-caveolin-1 was weakly and constitutively expressed in the normal control spinal cords. These results suggest that total body irradiation induces activation of microglial cells in the spinal cord through the phosphorylation of caveolin-1. -
The micronucleus frequency in cytokinesis-blocked lymphocytes of cattle in the vicinity of a nuclear power plant
Hae-June Lee, Chang-Mo Kang, Se-Ra Kim, Jong-Choon Kim, Chun-Sik Bae, Ki-Seok Oh, Sung-Kee Jo, Tae-Hwan Kim, Jong-Sik Jang, Sung 대한수의학회 Journal of Veterinary Science 4 Pages
대한수의학회 Journal of Veterinary Science 2007, 제 8권 제 2호 3 117-120 (4 pages)
Cytogenetic and hematological analyses were performed on the peripheral blood lymphocytes (PBLs) obtained from Korean native cattle bred in the vicinity of three nuclear power plants (Wolsong, Uljin and Yeonggwang) and in a control area. The micronucleus (MN) rates for the cattle from the Wolsong, Uljin and Yeonggwang nuclear power plants and for the control area were 9.87 ± 2.64, 8.90 ± 3.84, 9.20 ± 3.68 and 9.60 ± 3.91 per 1,000 cytokinesis-blocked lymphocytes, respectively. The apparent... -
Radioprotective effects of an acidic polysaccharide of Panax ginseng on bone marrow cells
Hyun-Ji Kim, Mi-Hyoung Kim, Yun-Young Byon, Jae Woo Park, Youngheun Jee, Hong-Gu Joo 대한수의학회 Journal of Veterinary Science 6 Pages
대한수의학회 Journal of Veterinary Science 2007, 제 8권 제 1호 6 39-44 (6 pages)
An acidic polysaccharide of Panax ginseng (APG), so called ginsan is known to have important immunomodulatory activities. It was recently reported that APG has radioprotective effects in mice but the detailed mechanism was not fully elucidated. This study examined the effects of APG on bone marrow cells (BMs). The phenotypical and functional changes in APG-treated BMs after gamma radiation were studied. The benefit of APG on BMs damaged by gamma radiation was determined by measuring the cell... -
Influence of gestational age at exposure on the prenatal effects of gamma-radiation
Sung-ho Kim, Se-ra Kim, Yun-sil Lee, Tae-hwan Kim, Sung-kee Jo, Cha-soo Lee 대한수의학회 Journal of Veterinary Science 6 Pages
대한수의학회 Journal of Veterinary Science 2001, 제 2권 제 1호 6 37-42 (6 pages)
to a single dose of 2.0 Gy gamma-radiation at a gestational 2.5 to 15.5 days post-coitus (p.c.). The animals were sacrificed on day 18 of gestation and the fetuses were examined for mortality, growth retardation, change in head size and any other morphological abnormalities. The only demonstrable effect of irradiation during the preimplantation period was an increase in prenatal mortality. Resorptions were maximal on post-exposure day 2.5 after conception. The pre-implantation irradiated embryos...
