Alcohol extract of Geum Chung Cho alleviates alcohol-induced short-term memory impairment in gerbils

Han-Sam Cho,Tae-Woon Kim,Sang-Seo Park,Mal-Soon Shin,Jae-Min Lee,Eun-Sang Ji,Chang-Ju Kim 한국운동재활학회 2015 한국운동재활학회 학술대회 Vol.2015 No.10

Chronic ethanol consumption leads to memory impairment and also induces brain damage. The hippocampus has been particularly regarded as a possible target organ of alcoholic intoxication, since this structure plays a prominent function in memory processes. Cordyceps has been used as a traditional medicine in Asian countries for a long time. Different types of Cordyceps extract were reported to have various pharmacological activities including anti-tumor, anti-inflammatory, anti-viral, and immune modulatory effects. Guem Chung Cho is an artificial cultivated Cordyceps, and was supplied from GCordy (Seoul, Korea). Ethanol extract of Cordycep (50 g) was made by rotary evaporate, and resulting powder 8.29 g was obtained (yield 17%). In the present study, we investigated the effects of ethanol extract of Geum Chung Cho on short-term memory, cell proliferation and apoptosis in the hippocampus of ethanol-treated gerbils. The gerbils were divided into 5 groups (n = 10 in each group): Control group, alcohol-treated group, alcohol-treated and 0.001 mg/kg Geum Chung Cho-applied group, alcohol-treated and 0.01 mg/kg Geum Chung Cho-applied group, and alcohol-treated and 0.1 mg/kg Geum Chung Cho-applied group. Gerbils in the alcohol-treated groups were orally administered ethanol (1 g/kg) once a day for 2 weeks. Gerbils in the Guem Chung Cho-applied groups were orally administered Guem Chung Cho extract at each dosage 1 hour before ethanol consumption. Our results revealed that consumption of alcohol for 2 weeks deteriorated short-term memory, induced apoptosis, and inhibited cell proliferation, and reduced expressions of brain-derived neurotrophic (BDNF) and tyrosine kinase B (TrkB). However, Guem Chung Cho treatment alleviated alcohol-induced short-term memory impairment through enhancing cell proliferation and BDNF expression with inhibiting apoptosis in the hippocampus. Guem Chung Cho showed maximum effects at 0.1 mg/kg. Based on these results, alcohol extract of Guem Chung Cho may provide therapeutic value for the treatment of chronic alcohol-inducted brain injury. This study was supported by GCordy company.

Cytogenetic Characteristics of Chinese Hamster Ovarian Cell CHO-K1

Sohn, Sea-Hwan,Cho, Eun-Jung,Jang, In-Surk The Korean Society of Animal Reproduction 2006 Reproductive & developmental biology Vol.30 No.4

The Chinese Hamster Ovarian cells CHO-K1 are one of the most extensively used cells for the evaluation of gene expression and toxicology. However, these cells are frequently used for biomedical research without consideration of their cytogenetic characteristics. Therefore, we carried out to investigate the karyologic profiles, the frequency and type of chromosome aberration, and the distribution of telomeric DNA on chromosomes of the CHO-K1 cells. The GTG banding and fluorescence in situ hybridization on CHO-K1 cells were performed to characterize the karyotype and the distribution of telomeric DNA The present study revealed that the chromosome modal number of CHO-K1 cells was 2n=20; eight chromosomes appeared to be identical with those of the normal Chinese hamster, whereas the remaining 12 chromosomes were shown to be translocated, deleted, inversed, or rearranged from Chinese hamster chromosomes. The telomeric DNA on CHO-K1 chromosomes was intensively distributed at the centromeres rather than the ends of chromosomes. In addition, three chromosomes had interstitial telomeres and one marker chromosome entirely consisted of telomeric DNAs. The frequency and type of chromosome aberrations in CHO-K1 cells were examined. Of the 822 metaphase spreads, 68 (8.3%) cells resulted in chromosome aberrations of which the chromosome breakage was the most frequently occurred.

Skin entrance dose for digital and film radiography in Korean dental schools

Cho, Eun-Sang,Choi, Kun-Ho,Kim, Min-Gyu,Lim, Hoi-Jeong,Yoon, Suk-Ja,,Kang, Byung-Cheol 대한구강악안면방사선학회 2005 Imaging Science in Dentistry Vol.35 No.4

Purpose : This study was aimed to compare skin entrance dose of digital radiography with that of film radiography and to show the dose reduction achievement with digital systems at 11 dental schools in Korea. Materials and Methods : Forty six intraoral radiographic systems in 11 dental schools were included in this study. Digital sensors were used in 33 systems and film was used in 13 systems. Researchers and the volunteer visited 11 dental schools in Korea. Researchers asked the radiologic technician (s) at each school to set the exposure parameters and aiming the x-ray tube for the periapical view of the mandibular molar of the volunteer. The skin entrance doses were measured at the same exposure parameters and distance by the technician for each system with a dosimeter (Multi-O-Meter : Unfors instruments, Billdal, Sweden). Results : The median dose was 491.2 μGy for digital radiography and 1,205.0 μGy for film radiography. The skin entrance dose digital radiography was significantly lower than that of film radiography (p<0.05). Conclusion : Fifty-nine percent skin entrance dose reduction with digital periapical radiography was achieved over the film radiography in Korean dental schools.

Efficient Interleukin-21 Production by Optimization of Codon and Signal Peptide in Chinese Hamster Ovarian Cells

( Hee Jun Cho ),( Byung Moo Oh ),( Jong-tae Kim ),( Jeewon Lim ),( Sang Yoon Park ),( Yo Sep Hwang ),( Kyoung Eun Baek ),( Bo-yeon Kim ),( Inpyo Choi ),( Hee Gu Lee ) 한국미생물 · 생명공학회 2019 Journal of microbiology and biotechnology Vol.29 No.2

Interleukin-21 is a common γ-chain cytokine that controls the immune responses of B cells, T cells, and natural killer cells. Targeting IL-21 to strengthen the immune system is promising for the development of vaccines as well as anti-infection and anti-tumor therapies. However, the practical application of IL-21 is limited by the high production cost. In this study, we improved IL-21 production by codon optimization and selection of appropriate signal peptide in CHO-K1 cells. Codon-optimized or non-optimized human IL-21 was stably transfected into CHO-K1 cells. IL-21 expression was 10-fold higher for codon-optimized than non-optimized IL-21. We fused five different signal peptides to codon-optimized mature IL-21 and evaluated their effect on IL-21 production. The best result (a 3-fold increase) was obtained using a signal peptide derived from human azurocidin. Furthermore, codon-optimized IL-21 containing the azurocidin signal peptide promoted IFN-γ secretion and STAT3 phosphorylation in NK-92 cells similar to codon-optimized IL-21 containing original signal peptide. Collectively, these results indicate that codon optimization and azurocidin signal peptides provide an efficient approach for the high-level production of IL-21 as a biopharmaceutical.

Three-Dimensional Porous Collagen/Chitosan Complex Sponge for Tissue Engineering

Kim, Sung Eun,Cho, Yong Woo,Kang, Eun Jung,Kwon, Ick Chan,Lee, Eunhee Bae,Kim, Jung Hyun,Chung, Hesson,Jeong, Seo Young The Korean Fiber Society 2001 Fibers and polymers Vol.2 No.2

A three-dimensional, porous collagen/chitosan complex sponge was prepared to closely simulate basic extracellular matrix (ECM) constitutes, collagen and glycosaminoglycan. The complex sponge was prepared by a lyophilization method and had the regular network with highly porous structure, suitable for cell adhesion and growth. The pores were well interconnected, and their distribution was fairly homogeneous. The complex sponge was crosslinked using 1-ethyl-3-(3-dimethyl aminopropyl) carbodiimide (EDC) and N-hydroxysuccinimide (NHS) to increase its boilogical stability and enhance its mechanical properties. The crosslinking medium has a great effect on the inner structure of the sponge. The homogeneous, porous structure of the sponge was remarkably collapsed in an aqueous crosslinking medium. However, the morphology of the sponge remained almost intact in a water/ethanol mixture crosslinking milieu. Mechanical properties of the collagen/chitosan sponge were significantly enhanced by EDC-mediated crosslinking. The potential of the sponge as a scaffold for tissue engineering was investigated using a Chinese hamster ovary cell (CHO-K1) line.

반말체 어미 ‘-게’의 의미기능 연구

이한민 ( Lee Han-min ),조은영 ( Cho Eun-young ) 국어학회 2015 국어학 Vol.74 No.-

본고는 조은영·이한민(2011)에서 정리하였던 연결어미에서 종결어미화된 ‘-게’의 의미기능과 문법화 과정의 연장선상에서 추가적인 ‘-게’의 용법으로 [가정]과 [추측유도]의 의미기능을 살피고자 하였다. [가정] ‘-게’구문은 조건절인 선행절과 결과절인 후행‘-게’절로 구성되며, 선행절의 부정을 이끄는 반어적 진술의 수사의문문으로 사용된다. [가정] ‘-게’는 선어말어미 ‘-었-’이 결합할 수 있는 점, 후행 ‘-게’절이 단독으로 쓰일 수 없는 점, 의미적으로 후행절의 내용이 선행절을 강조하는 기능을 한다는 점에서 [완료결과] ‘-게’와 연관성을 보인다. [추측유도] ‘-게’구문은 화자가 알고 있는 어떠한 사실에 대하여 청자의 ‘추측을 유도’하는 발화에서 사용되며, 설명의문문 형식이나 선택의문문 형식으로 쓰이지만, 청자로부터 신정보를 얻기 위한 질문으로는 사용되지 않는다. [추측유도] ‘-게’절은 선어말어미 ‘-었-’이 결합할 수 있는 점, 이미 이루어진 상황 혹은 확정된 사실에 대한 것이라는 점에서 [완료결과] ‘-게’와 유사한 의미를 보인다. 그러나 단독으로 사용될 수 있는 구문인지, 발화의 초점이 ‘-게’절에 있는지의 여부에서 차이를 보인다. [가정]은 [완료결과]와 통사적, 의미적으로 비슷한 부분이 많고, [완료결과]와 동일한 형식의 문장이 [가정]의 쓰임을 보이는 과도기적 형태도 존재한다. 따라서 [가정]은 [완료결과] 이후에 연결될 수 있는 단계로 볼 수 있다.[추측유도]의 경우에는 [완료결과], [가정]과 통사적, 의미적으로 공통적인 부분이 있지만, 조은영·이한민(2011)에서 정리한 종결어미 ‘-게’의 단계별 의미기능과 함께 다룰 수 있을지에 대해서는 결론을 내리지 못하였다. [추측유도]가 연결어미 ‘-게’에서 문법화한 종결어미가 아니라 다른 기원을 갖는 ‘-게’의 의미기능일 수도 있다는 가능성도 열어 두어야 할 것이다. 다만, [추측유도] ‘-게’가 공시적인 쓰임에서 연결어미 ‘-게’에서 문법화한 종결어미의 의미기능들과 연관성을 가지는 것은 분명하다. This paper tries to figure out the additory usage of final ending ‘-ge’―the semantic function of [supposition] and [assumption inducement]― as an extension to the grammaticalization process of final ending ‘-ge,’ originated from a connective ending ‘-ge’ organized by Cho, Eun-Young & Lee, Han-Min (2011). The sentence structure of [supposition] ‘-ge’ is consisted of the antecedent clause, which is a conditional clause, and the following clause ‘-ge’ clause, and is used as a rhetorical interrogative of an ironic statement denying the antecedent clause. It also shows some correlation with [completion result] ‘-ge’, considering the fact that ‘-ge’ can be combined with the tense prefinal ending ‘-eoss-’, and that following ‘-ge’ clause cannot be used by itself, and that the following clause can emphasize the antecedent clause semantically. The sentence structure of [assumption inducement] ‘-ge’ is often used when inducing a listener to make an assumption of a matter that a speaker already knows. However, it is not used as a question to get a new information from the listener although it may be used in a form of a wh-question or an alternative question. [Assumption inducement] ‘-ge’ clause shows some similar meaning with that of a [completion result] ‘-ge’ clause regarding the fact that it can be combined with the tense prefinal ending ‘-eoss-’ and that this clause is about something that has already happened or determined. However, it shows some differences in that whether this sentence structure can be used alone or its focus point of utterance is on ‘-ge’ clause itself. There exists several similarities between [supposition] and [completion result] in syntactic and semantic context, in addition to a transitional phase in which a sentence is used as a [supposition] clause when sentence structures exhibit identical features to [completion result]. Thus, it can be seen that [supposition] is a connecting stage following the [completion stage]. In case of [assumption inducement], there exists several similarities between [assumption inducement], [completion result] and [supposition] in syntactic and semantic context. However, the authors were not able to draw a definitive conclusion as to whether [assumption inducement] can be dealt with changing meanings of semantic functions of final ending ‘-ge,’ organized in Cho, Eun-Young & Lee, Han-Min (2011). Thus, there is an implied possibility that [Assumption inducement] may not be a grammaticalized final ending ‘-ge’ but that of different origins with dissimilar semantic functions. In the synchronic use, however, it is certain that [assumption result] ‘-ge’ has a definitive correlation with semantic functions of final endings that are grammaticalized in the connective ending ‘-ge.’

HIV 감염자에 대한 달팽이 엑기스의 혈액면역학적 효과

조영걸,이희정,오원일,강은숙,김은순,김영봉,조양자,조군제 大韓免疫學會 1996 大韓免疫學會誌 Vol.18 No.2

A unique sialic-acid-binding lectin from giant African snail Achatina fulica(AF) has a T cell mitogenicity. It was also noted that acetone extracts of AF have a anti-HIV effect in vitro. Thirty HIV-infected individuals(HIV+) were treated with AF extract(40% Chunho extract) for average 5. 5 months. Peripheral blood sampling and questionnaire were done every month after take. There was a significant decrease of WBC from 4 months after take. As a result, lymphocyte counts also decreased(P<0.01). However, there was a significant increase of CD4+T cell percentage from 1 month(P<0.01). The mean increase of CD4+T cell count was significant for first one month(39/pl)(P<0.05). Body weight also increased significantly(P<0.05). Over 90% HIV+ ex-pressed symptomatic improvement and wanted to be treated with AF extract continuously after the end of this study. In one HIV+ treated with AF for 19 months, the increases of CD4+T cell percentage and counts over 11 times after AF extract take were mean 67% and 85%, respectively, compared to baseline value. These data strongly suggest that aqueous AF extract has a immune enhancing effect on HN+.

QoS Support Extended SIP-based Network Architecture and Session Management Methods

Eunㅡhee Cho,Kang-Sik Shin,Sang-Jo Yoo 대한전자공학회 2005 ITC-CSCC :International Technical Conference on Ci Vol.2005 No.4

Cytogenetic Characteristics of Chinese Hamster Ovarian Cell CHO-K1

Sea Hwan Sohn,Eun Jung Cho,In Surk Jang 한국동물생명공학회(구 한국동물번식학회) 2006 Reproductive & developmental biology Vol.30 No.4

The Chinese Hamster Ovarian cells CHOK1 are one of the most extensively used cells for the evaluation of gene expression and toxicology. However, these cells are frequently used for biomedical research without consideration of their cytogenetic characteristics. Therefore, we carried out to investigate the karyologic profiles, the frequency and type of chromosome aberration, and the distribution of telomeric DNA on chromosomes of the CHOK1 cells. The GTGbanding and fluorescence in situ hybridization on CHOK1 cells were performed to characterize the karyotype and the distribution of telomeric DNA. The present study revealed that the chromosome modal number of CHOK1 cells was 2n=20; eight chromosomes appeared to be identical with those of the normal Chinese hamster, whereas the remaining 12 chromosomes were shown to be translocated, deleted, inversed, or rearranged from Chinese hamster chromosomes. The telomeric DNA on CHOK1 chromosomes was intensively distributed at the centromeres rather than the ends of chromosomes. In addition, three chromosomes had interstitial telomeres and one marker chromosome entirely consisted of telomeric DNAs. The frequency and type of chromosome aberrations in CHOK1 cells were examined. Of the 822 metaphase spreads, 68 (8.3%) cells resulted in chromosome aberrations of which the chromosome breakage was the most frequently occurred.

A Study on the obesity of middle-aged women

Cho, Hyun,Jin, Eun-Hee 仁濟大學校 2005 仁濟論叢 Vol.20 No.1

The goal of this study is to help promote the health of middle-aged women whose health is often not taken care of , by controlling weight to prevent obesity and various adult-related diseases. This research covered basic data related to obesity as well as exercise and food ingestion patterns of middle-aged women in the Gimhae and Jinju area. Research was conducted through a survey of 400 parents with children in elementary school on basic information as well as exercise and dietary habits. The survey composed of 11 exercise-related questions with a reliability factor of chronbach's a=.880, and 19 dietary habit related questions with a reliability factor of chronbach's a= .825. The data was analyzed using SAS 8.1, through frequency analysis, X^(2), and ANOVA. Math results of this study were as follows ; 1. Among general characteristics, subjects exhibited high instances of the followings: 70% of them are age 30-49, 75% have two chidren, 59.4% have 12years of education, 36.9% have a monthly income of 2,000-2,990thousand won, 57.3% are unemployed, and 51.9% are Buddhists. 2. On characteristics related to obesity, 64.6% are BMI 18.5 - 23, within normal range, 48.1% are trying to control weight, and 81.5% are exercising to control weight. 62.0% sited childbirth as the cause of weight increase. Average height of test subjects was 160.06cm, average weight 56.26kg, and BMI 21.96. The average pre-marital weight was 49.61kg and BMI 19.34. 3. On dietary habit related questions (max 5 points), the mean score was 4.00 among underweight subjects and 3.58 among overweight subjects, suggesting better dietary habits for the underweight group. Dietary habits and BMI have a significant statistical difference. 4. On exercise related questions (maximum 5 points), the mean score was 3.38 among overweight subjects and 2.66 for underweight subjects, suggesting that the overweight subjects exercised more. Exercise and BMI have a significant statistical difference.