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GU,Yeunhwa,MORI,Takehiko,YAMAMOTO,Youichi,Hasegawa,Takeo,KUSAMA,Tomoko 대한방사선 방어학회 1999 방사선방어학회지 Vol.24 No.1
태생 8일째인 임신한 생쥐에 137-Cs 감마선과 초음파를 조사하였다. 복합조사의 경우 임신한 생쥐는 1.5 Gy 방사선과 1.0 W/㎠ 초음파로 -1, 0, 1, 3, 6 시간 간격으로 조사하였다. 사망과 외부 기형은 태생 18일에 검진하였다. 방사선에 의한 탠생 8일의 사망 임계값은 0.5에서 1.0 Gy 사이였으며, 초음파는 1.0에서 1.5 W/㎠ 사이였다. 태생 후반기의 사망은 방사선과 초음파의 복합 치료에 의해 상승적으로 증가되었다. 방사선에 의한 뇌탈출기형 및 무안구증의 임계값은 각각 0.5에서 1.0Gy사이와 1.0에서 1.5Gy 사이였다. 초음파에 의한 뇌탈출기형과 무안구증의 임계값은 각각 1.0에서 1.5W/㎠ 사이와 1.5 W/㎠ 이상이었다. 복합치료의 경우는 뇌탈출기형과 무안구증의 빈도가 상승적으로 증가하였다. 한 시간 간격으로 두 가지 치료를 받은 생쥐에서 뇌탈출기형과 무안구증의 빈도가 최고치에 도달하였다. Pregnant ICR mice were treated with 137Cs gamma-ray / ultrasound on day 8 of gestation. In combined treatments, pregnant mice were treated with both 1.5 Gy of radiation and 1.0 W/㎠ ultrasound at time intervals of -0, 1, 3 and 6 hours. The mortalities and external malformations were investigated on day 18 of gestation. The threshold dose of mortality induced by radiation on day 8 of gestation was between 0.5 and 1.0 Gy, and that which was induced by ultrasound was between 1.0 and 1.5 W/㎠. The mortalities in the late-stage of gestation induced by combined treatment with radiation and ultrasound increased synergistically. The threshold dose of exencephaly and anophthalmia induced by radiation were between 0.5 and 1.0 Gy and between 1.0 and 1.5 Gy, respectively. Those of exencephaly and anophthalmia induced by ultrasound were between 1.0 and 1.5 W/㎠ and more than 1.5 W/㎠, respectively. In combined treatments, the incidence of exencephaly and anophthalmia were found to increase synergistically. In the mice treated with both agents at a time interval of one hour, the incidence of exencephaly and anophthalmia reached maximum levels.
Gu, Yeun-Hwa,Hasegawa, Takeo,Suzuki, Ikukatsu,Yamamoto, Youichi,Yoon, Yeog-Byung,Rhee, Soo-Yong Korean Association for Radiation Protection 2001 방사선방어학회지 Vol.26 No.4
Guarana, a tropical plant is found in powdered for in health food and is very popular soft drink in Brazil as an energy feaster with its high caffeine contents. We examined its radioprotection effects during organogenesis stages of ICR mice by malformations rate and cellular lead 8 the embryo by radiation and analyzed the mechanism of the radioprotection effects in the fetal of ICR mice. The results of this study showed that Guarana reduced clearly the embryonic death rate and teratogenesis rate by radiation. Its radioprotection effect inject be related with its radioprotection effect might be related with its antioxidant effect or free radical scavenger. We need to exposure the Guarana as a potential radioprotection agent. Therefore, we investigated about radiation effects by Guarana using to mice experiments in this paper.
Adrenal Venous Sampling for Subtype Diagnosis of Primary Hyperaldosteronism
Mitsuhide Naruse,Akiyo Tanabe,Koichi Yamamoto,Hiromi Rakugi,Mitsuhiro Kometani,Takashi Yoneda,Hiroki Kobayashi,Masanori Abe,Youichi Ohno,Nobuya Inagaki,Shoichiro Izawa,Masakatsu Sone 대한내분비학회 2021 Endocrinology and metabolism Vol.36 No.5
Adrenal venous sampling (AVS) is the key procedure for lateralization of primary hyperaldosteronism (PA) before surgery. Identification of the adrenal veins using computed tomography (CT) and intraoperative cortisol assay facilitates the success of catheterization. Although administration of adrenocorticotropic hormone (ACTH) has benefits such as improving the success rate, some unilateral cases could be falsely diagnosed as bilateral. Selectivity index of 5 with ACTH stimulation to assess the selectivity of catheterization and lateralization index (LI) >4 with ACTH stimulation for unilateral diagnosis is used in many centers. Co-secretion of cortisol from the tumor potentially affects the lateralization by the LI. Patients aged <35 years with hypokalemia, marked aldosteroneexcess, and unilateral adrenal nodule on CT have a higher probability of unilateral disease. Patients with normokalemia, mild aldosterone excess, and no adrenal tumor on CT have a higher probability of bilateral disease. Although no methods have 100% specificity for subtype diagnosis that would allow bypassing AVS, prediction of the subtype should be considered when recommending AVSto patients. Methodological standardization and strict indication improve diagnostic quality of AVS. Development of non-invasiveimaging and biochemical markers will drive a paradigm shift in the clinical practice of PA.
Gu, Yeunhwa,Takeo Hasegawa,Ikukatsu Suzuki,Youichi Yamamoto,Yoon, Yeogbyung,Rhee, Soo-Yong 대한방사선 방어학회 2001 방사선방어학회지 Vol.26 No.4
Guarana, tropical plant is found in powdered for in health food and is very popular soft drink in Brazil as an energy feaster with its high caffeine contents. We examined its radioprotection effects during organogenesis stages of ICR mice by malformations rate and cellular lead 8 the embryo by radiation and analyzed the mechanism of the radioprotection effects in the fetal of ICR mice. The results of this study showed that Guarana reduced clearly the embryonic death rate and teratogenesis rate by radiation. Its radioprotection effect inject be related with its radioprotection effect might be related with its antioxidant effect of free radical scavenger. We need to exposure the Guarana as a potential radioprotection agent. Therefore, we investigated about radiation effects by Guarana using to mice experiments in this paper.