http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Anti-osteoporotic Effects of Sericin-Calcium Conjugate in Ovariectomized Rats
Ehn-Kyoung Choi, Dongsun Park, So-Young Choi , Yun-Hui Yang, Seock-Yeon Hwang, Seongho Yeon, Jeong-Yong Lee, Ill-Hwa Kim, Yun-Bae Kim, Hyun-Gu Kang1 충북대학교 동물의학연구소 2011 Journal of Biomedical and Translational Research Vol.12 No.2
This study was conducted in order to evaluate the effect of sericin-calcium (SC) as therapy for ovariectomy-induced osteoporosis in rats. Three weeks after ovariectomy (OVX), Sprague-Dawley rats were divided randomly into three groups: sham-operated group (Sham), ovariectomized group, and SC-treatment group (OVX+SC). Rats in the OVX+SC group were given drinking water containing 0.07% SC for eight weeks. Bone breaking force, mineralization, and blood parameters related to bone metabolism were analyzed. In OVX animals, blood concentration of 17β-estradiol showed a significant decrease, while osteocalcin and type I collagen C-terminal telopeptides (CTx) showed an increase. Breaking force of femurs as well as bone mineral density (BMD), ash, calcium, and phosphorus in femurs showed a significant decrease following OVX. Treatment with SC (0.07% in drinking water) resulted not only in remarkable restoration of the decreased 17β-estradiol and increased osteocalcin and CTx concentrations, but also led to recovery of decreased femoral breaking force, BMD, ash, calcium, and phosphorus. It is suggested that SC effectively improves bone density by preventing bone turnover-mediated osteocalcin, CTx, and minerals, and that it could be a potential candidate for use in therapy or prevention of post-menopausal osteoporosis.
Animal Models of Periventricular Leukomalacia
Ehn-Kyoung Choi,Dongsun Park,Tae Kyun Kim,Sun Hee Lee,Dae-Kwon Bae,Goeun Yang,Yun-Hui Yang,Jangbeen Kyung,Dajeong Kim,Woo Ryoung Lee,Jun-Gyo Suh,Eun-Suk Jeong,Seung U. Kim,Yun-Bae Kim 한국실험동물학회 2011 Laboratory Animal Research Vol.27 No.2
Periventricular leukomalacia, specifically characterized as white matter injury, in neonates is strongly associated with the damage of pre-myelinating oligodendrocytes. Clinical data suggest that hypoxiaischemia during delivery and intrauterine or neonatal infection-inflammation are important factors in the etiology of periventricular leukomalacia including cerebral palsy, a serious case exhibiting neurobehavioral deficits of periventricular leukomalacia. In order to explore the pathophysiological mechanisms of white matter injury and to better understand how infectious agents may affect the vulnerability of the immature brain to injury, novel animal models have been developed using hypoperfusion, microbes or bacterial products (lipopolysaccharide) and excitotoxins. Such efforts have developed rat models that produce predominantly white matter lesions by adopting combined hypoxia-ischemia technique on postnatal days 1-7, in which unilateral or bilateral carotid arteries of animals are occluded (ischemia) followed by 1-2 hour exposure to 6-8% oxygen environment (hypoxia). Furthermore, low doses of lipopolysaccharide that by themselves have no adverse-effects in 7-day-old rats, dramatically increase brain injury to hypoxicischemic challenge, implying that inflammation sensitizes the immature central nervous system. Therefore, among numerous models of periventricular leukomalacia, combination of hypoxia-ischemialipopolysaccharide might be one of the most-acceptable rodent models to induce extensive white matter injury and ensuing neurobehavioral deficits for the evaluation of candidate therapeutics.
Skin whitening and anti-wrinkle activities of white rose petal extracts
JIEUN CHOI,EUN SUK AN,YOUNG-HWAN BAN,YESEUL CHA,HAIYU GUO,JI YOUNG LEE,NU RY HAN,EUN SANG CHO,EUN SU JEON,DA WOOM SEO,JUNG-MIN YON,HAE CHEON IM,JAE KWON CHOI,YOON BOK LEE,EHN-KYOUNG CHOI,YUN-BAE KIM 한국실험동물학회 2016 한국실험동물학회 학술발표대회 논문집 Vol.2016 No.08
( Jae Kwon Choi ),( Yoon Bok Lee ),( Kyun Hee Lee ),( Hae Cheon Im ),( Yun Bae Kim ),( Ehn Kyoung Choi ),( Seong Soo Joo ),( Su Kil Jang ),( Nam Soo Han ),( Chung Ho Kim ) 한국응용생명화학회(구 한국농화학회) 2015 Journal of Applied Biological Chemistry (J. Appl. Vol.58 No.2
The extract of white rose petals has an antioxidant effect and can be used to treat allergic disease. The purpose of this study was to identify optimal conditions for extracting antioxidative compounds from white rose petals with 2,2-diphenyl-1- picrylhydrazyl scavenging activities. A response surface methodology based on a central composite design was used to investigate the effects of three independent variables: ethanol concentration (X1), extraction temperature (X2), and extraction time (X3). The estimated optimal conditions for obtaining phenolic compounds with antioxidant activities were as follows: ethanol concentration of 42% (X1), extraction time of 80 min (X3), and extraction temperature of 75oC (X2). The estimated optimal conditions for obtaining flavonoid compounds with antioxidant effects were an ethanol concentration of 41% (X1), extraction time of 119 min (X3), and an extraction temperature of 75oC (X2). Under these conditions, predicted response values for the phenolic and flavonoid contents were 243.5 mg gallic acid equivalent/g dry mass and 19.93 mg catechin equivalent (CE)/g dry mass, respectively.
Tae-Su Kim,Ehn-Kyoung Choi,Jihyun Kim,Kyungha Shin,Sung-Pyo Lee,Youngjin Choi,Joseph H. Jeon,Yun-Bae Kim 한국실험동물학회 2014 Laboratory Animal Research Vol.30 No.3
Helicobacter pylori-eliminating effects of FEMY-R7, composed of fucoidan and evening primrose extract, were investigated in mice and humans. Male C57BL/6 mice were infected with the bacteria by intragastric inoculation (1×10<SUP>9</SUP> CFU/mouse) 3 times at 2-day intervals, and simultaneously, orally treated twice a day with 10 or 100 mg/kg FEMY-R7 for 2 weeks. In Campylobcter-like organism-detection test, FEMY-R7 markedly reduced the urease-positive reactivity. In a clinical sudy, human subjects, confirmed to be infected with Helicobacter pylori, were orally administered twice a day with a capsule containing 150 mg FEMY-R7 for 8 weeks. FEMY-R7 significantly decreased both the Delta over baseline-value in urea breath test and the serum pepsinogens I and II levels. The results indicate that FEMY-R7 not only eliminates H. pylori from gastric mucosa of animals and humans, but also improves gastric function.
Shin, Kyungha,Cha, Yeseul,Kim, Kwang Sei,Choi, Ehn-Kyoung,Choi, Youngjin,Guo, Haiyu,Ban, Young-Hwan,Kim, Jong-Choon,Park, Dongsun,Kim, Yun-Bae Hindawi Publishing Corporation 2016 Behavioural neurology Vol.2016 No.-
<P>Amygdala is involved in the fear memory that recognizes certain environmental cues predicting threatening events. Manipulation of neurotransmission within the amygdala affects the expression of conditioned and unconditioned emotional memories such as fear freezing behaviour. We previously demonstrated that F3.ChAT human neural stem cells (NSCs) overexpressing choline acetyltransferase (ChAT) improve cognitive function of Alzheimer's disease model rats with hippocampal or cholinergic nerve injuries by increasing acetylcholine (ACh) level. In the present study, we examined the effect of F3.ChAT cells on the deficit of unconditioned fear freezing. Rats given N-methyl-<SMALL>D</SMALL>-aspartate (NMDA) in their amygdala 2 weeks prior to cat odor exposure displayed very short resting (freezing) time compared to normal animals. NMDA induced neuronal degeneration in the amygdala, leading to a decreased ACh concentration in cerebrospinal fluid. However, intracerebroventricular transplantation of F3.ChAT cells attenuated amygdala lesions 4 weeks after transplantation. The transplanted cells were found in the NMDA-injury sites and produced ChAT protein. In addition, F3.ChAT-receiving rats recuperated freezing time staying remote from the cat odor source, according to the recovery of brain ACh concentration. The results indicate that human NSCs overexpressing ChAT may facilitate retrieval of unconditioned fear memory by increasing ACh level.</P>