The role of FGF-2 in smoke-induced emphysema and the therapeutic potential of recombinant FGF-2 in patients with COPD

Kim, You-Sun,Hong, Goohyeon,Kim, Doh Hyung,Kim, Young Min,Kim, Yoon-Keun,Oh, Yeon-Mok,Jee, Young-Koo Nature Publishing Group UK 2018 Experimental and molecular medicine Vol.50 No.11

<▼1><P>Although the positive effects of recombinant fibroblast growth factor-2 (rFGF-2) in chronic obstructive pulmonary disease (COPD) have been implicated in previous studies, knowledge of its role in COPD remains limited. The mechanism of FGF2 in a COPD mouse model and the therapeutic potential of rFGF-2 were investigated in COPD. The mechanism and protective effects of rFGF-2 were evaluated in cigarette smoke-exposed or elastase-induced COPD animal models. Inflammation was assessed in alveolar cells and lung tissues from mice. FGF-2 was decreased in the lungs of cigarette smoke-exposed mice. Intranasal use of rFGF-2 significantly reduced macrophage-dominant inflammation and alveolar destruction in the lungs. In the elastase-induced emphysema model, rFGF-2 improved regeneration of the lungs. In humans, plasma FGF-2 was decreased significantly in COPD compared with normal subjects (10 subjects, <I>P</I> <I>=</I> 0.037). The safety and efficacy of inhaled rFGF-2 use was examined in COPD patients, along with changes in respiratory symptoms and pulmonary function. A 2-week treatment with inhaled rFGF-2 in COPD (<I>n</I> = 6) resulted in significantly improved respiratory symptoms compared with baseline levels (<I>P</I> <I><</I> 0.05); however, the results were not significant compared with the placebo. The pulmonary function test results of COPD improved numerically compared with those in the placebo, but the difference was not statistically significant. No serious adverse events occurred during treatment with inhaled rFGF-2. The loss of FGF-2 production is an important mechanism in the development of COPD. Inhaling rFGF-2 may be a new therapeutic option for patients with COPD because rFGF-2 decreases inflammation in lungs exposed to cigarette smoke.</P></▼1><▼2><P><B>Lung disease: Inhaling a protein might help</B></P><P>Studies on the role of the protein ‘fibroblast growth factor-2’ (FGF-2) in chronic obstructive pulmonary disease (COPD) suggest that inhaled FGF-2 could help treat the emphysema linked to smoking. Researchers in South Korea led by Young-Koo Jee at Dankook University, Cheonan, and Yeon-Mok Oh at the University of Ulsan, Seoul, studied the role of the reduced FGF-2 levels found in mice with lung inflammation caused by exposure to cigarette smoke. They also uncovered details of a protective effect of inhaled FGF-2, identifying specific cellular and lung structure changes attributed to the administered FGF-2. Reduced FGF-2 levels were also found in patients with COPD. Initial trials revealed some improvement in patients treated with FGF-2, but not at a statistically significant level. Nevertheless, the authors suggest their results justify further investigation of the protein’s therapeutic potential.</P></▼2>

정신분열병에 대한 리스페리돈의 효과 및 안정성

이민수,김용구,김영훈,연병길,오병훈,윤도준,윤진상,이철,정희연,강병조,김광수,김동언,김명정,김상훈,김희철,나철,노승호,민경준,박기창,박두병,백기청,백인호,손봉기,손진욱,양병환,양창국,우행원,이정호,이종범,이홍식,임기영,전태연,정영조,정영철,정인과,정인원,지익성,채정호,한상익,한선호,한진희,서광윤 大韓神經精神醫學會 1998 신경정신의학 Vol.37 No.1

연구목적 : 본 시험의 목적은 임상시험 시작전에 연구자들을 대상으로 PANSS Workshop을 통하여 PANSS, ESRS에 대한 국내에서의 표준화 작업을 구축하고 새로운 정신병 치료제인 리스페리돈의 효과와 안정성을 재확인하여 리스페리돈 사용에 대한 적정화를 이루는데 있다. 연구방법 : 1996년 4월부터 1996년 9월까지 국내 39개 대학병원 정신과에 입원중인 혹은 증상이 악화되어 입원하는 정신분열병 환자 377명을 대상으로 다시설 개방 연구를 시행하였다. 1주일간의 약물 배설기간을 가진후, 리스페리돈을 8주간 투여하였고, 기준점, 1주, 2주, 4주, 그리고 8주후에 평가되었다. 용량은 제1일에는 리스페리돈 1mg씩 1일 2회, 제2일에는 2mg씩 1일 2회, 제3∼7일에는 3mg씩 1일 2회 투여하였다. 이후 환자의 임상상태에 따라 임의로 증량할 수 있으며, 최대 일일 16mg을 초과하지 않도록 하였다. 추체외로 증상을 조절하기 위한 투약을 허용하였다. 임상증상 및 부작용의 평가는 PANSS(Positive and Negative Syndrome Scale), CGI(Clinical Global Impression) 그리고 ESRS(Extrapyramidal Symptom Rating Scale)을 사용하였다. 연구결과 : 377명중 343명(91%)이 8주간의 연구를 완결하였다. 치료 종결시점인 8주후 PANSS 총점수가 20% 이상 호전된 경우를 약물 반응군으로 정의할때, 약물반응군은 81.3%였다. 리스페리돈에 반응하는 예측인자로는 발병연령, 이전의 입원 횟수, 유병기간이 관련 있었다. 리스페리돈은 1주후부터 PANSS양성, 음성, 및 일반정신병리 점수상에 유의한 호전을 보여 효과가 빨랐다. CGI의 경우도 기준점에 비해 1주후부터 유의한 감소를 나타내었다. ESRS의 경우, 파킨슨 평가점수는 기준점과 비교해 투여 1주, 2주, 4주후 유의하게 증가되었다가 8주후 기준점과 차이가 없었다. Dystonia 평가점수는 1주후만 유의한 증가를 보였으며, dyskinesia 평가점수는 유의한 차이가 없었다. 혈압, 맥박수의 생명징후 및 일반 혈액학 검사, 생화학적 검사, 심전도 검사에서 유의한 변화는 없었다. 결 론 : 이상의 다시설 개방 임상 연구를 통해 리스페리돈은 정신분열병 환자에서 양성증상뿐만 아니라 음성증상 및 전반적인 증상에도 효과적인 것으로 사료된다. 보다 명확한 평가를 위해서는 다른 항정신병약물과의 이중맹검 연구가 필요할 것으로 생각되며, 또한 장기적 치료에 대한 평가도 함께 이루어져야 하겠다. Objective : The purpose of this study was to investigate the efficacy and safety of risperidone in the treatment of Korean schizophrenic patients. Method : This multicenter open study included 377 schizophrenic patients drawn from 39 university hospitals. After a wash-out period of 1 week, the schizophrenic patients were treated with risperidone for 8 weeks and evaluated at 5 points ; at baseline, and 1, 2, 4 and 8 weeks of treatment. The dose was increased from 2mg/day(1mg twice daily) to 6mg/day(3mg twice daily) during the first week and adjusted to a maximum of 16mg/day over the next 7 weeks according to the patient's clinical response. Medication to control extrapyramidal symptoms was permitted. The psychiatric and neurological status of the patients was assessed by PANSS, CGI, and ESRS scales. Results : 343(91%) of 377 patients completed the 8-week trial period. Clinical improvement, as defined by a 20% or more reduction in total PANSS score at end point, was shown by 81.3% of patients. The predictors of response to risperidone were associated older age, shorter duration of illness, fewer previous hospitalization. Risperidone had rapid onset of action ; a significant decrease of the total PANSS and three PANSS factor(positive, negative, general), and CGI was already noticed at the end of first week. For the ESRS, parkinsonism rating scores were significantly increased until week 4 comparing with baseline. Dystonia rating scores were significantly increased until week 1, and dyskinesia rating scores were not significantly changed during the study. Laboratory parameters including vital sign, EKG, hematological, and biochemical values showed no significant changes during the trial. Conclusions : This study suggests that risperidone is generally safe and effective against both the positive and negative symptoms in our group of patients.

Gap Junction Contributions to the Goldfish Electroretinogram at the Photopic Illumination Level

Kim, Doh-Yeon,Jung, Chang-Sub The Korean Society of Pharmacology 2012 The Korean Journal of Physiology & Pharmacology Vol.16 No.3

Understanding how the b-wave of the electroretinogram (ERG) is generated by full-field light stimulation is still a challenge in visual neuroscience. To understand more about the origin of the b-wave, we studied the contributions of gap junctions to the ERG b-wave. Many types of retinal neurons are connected to similar and different neighboring neurons through gap junctions. The photopic (cone-dominated) ERG, stimulated by a small light beam, was recorded from goldfish (Carassius auratus) using a corneal electrode. Data were obtained before and after intravitreal injection of agents into the eye under a photopic illumination level. Several agents were used to affect gap junctions, such as dopamine D1 and D2 receptor agonists and antagonists, a nitric oxide (NO) donor, a nitric oxide synthase (NOS) inhibitor, the gap junction blocker meclofenamic acid (MFA), and mixtures of these agents. The ERG b-waves, which were enhanced by MFA, sodium nitroprusside (SNP), SKF 38393, and sulpiride, remained following application of a further injection of a mixture with MFA. The ERG b-waves decreased following $N^G$-nitro-L-arginine methyl ester (L-NAME), SCH 23390, and quinpirole administration but were enhanced by further injection of a mixture with MFA. These results indicate that gap junction activity influences b-waves of the ERG related to NO and dopamine actions.

On the Growth Process of Grains Dispersed in a Liquid Matrix

Kim Doh-Yeon 한국분말야금학회 1998 한국분말야금학회 학술대회논문집 Vol.1998 No.1

The growth process of solid grains in a liquid matrix is usually explained in tem1S of Ostwald ripening. The variation of growth (dissolution) rate as a function of grain size during Ostwald ripening predicted that the dissolution rate becomes very large as grain size decreases but the growth rate of a large grain is rather limited. Therefore. a rather uniform size distribution of grain size is maintained once after the quasi-equilibrium state is reached. Quite frequently, however, the exaggerated grain growth (EGG) is observed to occur: only a limited number of grains grow exceptionally. From the observation that the EGG occurs only for the faceted grains with apparently straight solid-liquid interfaces, the EGG is suggested to be the consequence of growth process controlled by 2-dimensional nucleation. In this study, the result by computer calculation on the grain growth process controlled by various mechanisms will be given.

Gap Junction Contributions to the Goldfish Electroretinogram at the Photopic Illumination Level

Doh-Yeon Kim,Chang-Sub Jung 대한생리학회-대한약리학회 2012 The Korean Journal of Physiology & Pharmacology Vol.16 No.3

Understanding how the b-wave of the electroretinogram (ERG) is generated by full-field light stimulation is still a challenge in visual neuroscience. To understand more about the origin of the b-wave, we studied the contributions of gap junctions to the ERG b-wave. Many types of retinal neurons are connected to similar and different neighboring neurons through gap junctions. The photopic (cone-dominated) ERG, stimulated by a small light beam, was recorded from goldfish (Carassius auratus) using a corneal electrode. Data were obtained before and after intravitreal injection of agents into the eye under a photopic illumination level. Several agents were used to affect gap junctions, such as dopamine D1 and D2 receptor agonists and antagonists, a nitric oxide (NO) donor, a nitric oxide synthase (NOS) inhibitor, the gap junction blocker meclofenamic acid (MFA), and mixtures of these agents. The ERG b-waves, which were enhanced by MFA, sodium nitroprusside (SNP), SKF 38393, and sulpiride, remained following application of a further injection of a mixture with MFA. The ERG b-waves decreased following N^G-nitro-L-arginine methyl ester (L-NAME), SCH 23390, and quinpirole administration but were enhanced by further injection of a mixture with MFA. These results indicate that gap junction activity influences b-waves of the ERG related to NO and dopamine actions.

The Effect of Metformin on Liver Lipid Accumulation in Mice Fed a High-fat Diet

Kim, Yun-Hye,Lee, Youn-Ju,Jeong, Yun-Yeong,Kim, Yong-Woon,Park, So-Young,Doh, Kyung-Oh,Kim, Jong-Yeon The Korean Society for Applied Biological Chemistr 2010 Applied Biological Chemistry (Appl Biol Chem) Vol.53 No.2

Fat accumulation in the liver involves an imbalance in the hepatic uptake of free fatty acids and their metabolism. Fat accumulation in the liver plays a critical role in the initiation of nonalcoholic steatohepatitis, which may progress to liver fibrosis and cirrhosis. The prevention of hepatic fat accumulation, therefore, may be effective therapy for nonalcoholic fatty liver disease. However, the effect of insulin sensitizing drugs on hepatic fat accumulation is still unclear. Here, we show that metformin, the most widely used insulin sensitizer, prevents liver fat accumulation induced by a high-fat diet. Male C57BL/6 mice weighing 18~20 g were grouped as follows for 8 weeks: mice chow diet, high-fat diet pair-fed control, and high-fat diet with metformin. Triglyceride and total cholesterol levels in plasma and liver were measured. AMP-activated protein kinase activity in liver were determined by Western blot. Expressions of SREBP1c and FAS in the liver were measured using RT-PCR. The high-fat diet increased body weight, abdominal fat mass, fat accumulation in the liver, and plasma total cholesterol, as well as liver triglyceride and total cholesterol levels, but plasma triglyceride levels were unchanged. Metformin decreased each of these measures. The high-fat diet decreased liver AMP-activated protein kinase activity as well as SREBP-1c and FAS expressions, and metformin reversed these changes. In conclusion, a high-fat diet induced visceral obesity and hepatic fat accumulation. Metformin prevented visceral obesity, hepatic fat accumulation, and reduced plasma total and LDL-cholesterol concentrations, potentially through modulating AMP-activated protein kinase activity and the expressions of SREBP-1C and FAS.

Can Television Program Diversity Be Measured? : Validity of program type model and measurement formula

Doh-Yeon Kim(김도연) 서울대학교 언론정보연구소 1998 언론정보연구 Vol.35 No.-

Hydrogel-laden paper scaffold system for origami-based tissue engineering

Kim, Su-Hwan,Lee, Hak Rae,Yu, Seung Jung,Han, Min-Eui,Lee, Doh Young,Kim, Soo Yeon,Ahn, Hee-Jin,Han, Mi-Jung,Lee, Tae-Ik,Kim, Taek-Soo,Kwon, Seong Keun,Im, Sung Gap,Hwang, Nathaniel S. National Academy of Sciences 2015 PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF Vol.112 No.50

<P><B>Significance</B></P><P>This work describes an intriguing strategy for the formation of hydrogel-laden multiform structures utilizing paper sheets and suggests a route for trachea tissue engineering. It combines concepts extracted from paper origami, functional thin polymer coating, and thin hydrogel layering on top of the paper scaffolds. A computer-aided design-based lock-and-key arrangement was used for folding the sheets into multiform structures with spatial arrangements. With encapsulating cells in hydrogel-laden paper, the scaffold system was able to deliver biological cues in vivo. In this work, we have successfully applied an origami-based tissue engineering approach to the trachea regeneration model.</P><P>In this study, we present a method for assembling biofunctionalized paper into a multiform structured scaffold system for reliable tissue regeneration using an origami-based approach. The surface of a paper was conformally modified with a poly(styrene-co-maleic anhydride) layer via initiated chemical vapor deposition followed by the immobilization of poly-<SMALL>l</SMALL>-lysine (PLL) and deposition of Ca<SUP>2+</SUP>. This procedure ensures the formation of alginate hydrogel on the paper due to Ca<SUP>2+</SUP> diffusion. Furthermore, strong adhesion of the alginate hydrogel on the paper onto the paper substrate was achieved due to an electrostatic interaction between the alginate and PLL. The developed scaffold system was versatile and allowed area-selective cell seeding. Also, the hydrogel-laden paper could be folded freely into 3D tissue-like structures using a simple origami-based method. The cylindrically constructed paper scaffold system with chondrocytes was applied into a three-ring defect trachea in rabbits. The transplanted engineered tissues replaced the native trachea without stenosis after 4 wks. As for the custom-built scaffold system, the hydrogel-laden paper system will provide a robust and facile method for the formation of tissues mimicking native tissue constructs.</P>

전측두엽 치매 3례

김이영,김재경,이유리,서만길,우금석,장용이,김지혜,서연림,김상은,김도관 大韓神經精神醫學會 1999 신경정신의학 Vol.38 No.6

전측두엽 치매는 치매의 흔한 원인이며 알쯔하이머병과 구별되는 질환이다. 하지만 임상증상에서 인지기능의 현저한 장애가 나타나기 전에 사회적 기능과 인격의 붕괴가 서서히 일어나기 때문에 다른 정신과 질환으로 진단될 수도 있다. 저자들은 3례 전측두엽 치매를 보고하였다. 이 증례들은 전측두엽 치매를 임상 진단으로 고려할 만한 병력과 증상을 가지고 있고, 신경심리학 검사, 대뇌의 자기공명영상과 18F-FDG양성자방출단층촬영술 등의 검사에서 전형적인 전측두엽 치매의 소견을 보였다. 이러한 병력과 임상양상 그리고 객관적인 소견들은 임상에서 전측두엽 치매에 주의를 기울이고 적절하게 진단하는 데 도움이 될 것으로 생각된다. Frontotemporal dementia is a common cause of dementia and distinguished from Alzheimer`s disease. Because its clinical symptoms are characterized by slow progressive social breakdown and change of personality before cognitive impairments become prominent, it may be diagosed as other psychiatric disease. We have presented three cases of frontotemporal dementia. They had typical clinical histories and symptoms which deserve to be considered frontotemporal dementia. They showed appropriate findings of frontotemporal dementia in the neuropsychological tests and brain imaging study with brain magnetic resonance imaging and 18F-FDGpositron emission tomography. Their clinical histories and findings are thought to be helpful for clinician to give attention to and diagnose frontotemporal dementia.

한국의 미디어 글로벌화 정책에 관한 연구: 주요 정책 사례를 중심으로

김도연 ( Kim Doh Yeon ) 국민대학교 사회과학연구소 2023 社會科學硏究 Vol.35 No.2

이 연구는 한국 미디어 정책에서의 글로벌화 추진에 대해 주요 정책 사례들을 중심으로 분석하였다. 아울러 주요 미디어 연구에서의 글로벌화 논의를 별도로 분석하고 미디어 정책들과 어떻게 관련되었는지를 살펴보았다. 1985년 <선진방송 5개년 계획(안)>에서 처음 언급되기 시작한 국내 미디어 글로벌화 정책은 시장 개방, 규제기관과 규제의 글로벌화, 방송기술 표준의 글로벌화 등으로 주제가 확대되었다. 이후 문화체육관광부가 5년 주기로 발표한 <방송영상산업 진흥 중장기계획(안)>에서는 법령과 예산에 입각하여 연속성과 구체성을 가진 글로벌화 정책 과제들이 제시되고, 과제 간 연관성을 토대로 상승효과도 기대할 수 있게 되었다. 다만, 지나친 정부 개입의 모습은 자제할 필요가 있다고 평가되었다. 또한 미디어 분야 학술 성과에서도 글로벌화 관련 논문이 다수 생산되었지만 정책 담론과의 접점이 부족한 듯 보인 점은 성찰할 필요가 있다. 이런 결과를 토대로 향후 미디어 정책에서의 글로벌화 추진 방안과 미디어 연구에서의 글로벌화 관련 주제에 대해 제안하였다. This study examined the globalization discourse overall, and analyzed the promotion of globalization in Korean media policy focusing on major policy cases. In addition, the discussions on globalization and globalization policy in media studies and how it has been related to major media policies were reviewed. Globalization in domestic media policy, first mentioned in the Advanced Broadcasting Five-Year Plan in 1985, has expanded its theme to market opening, globalization of regulators and regulations, and globalization of broadcasting technology standards. Since then, “the Mid & Long-Term Plans to Promote the Broadcasting and Video Industry” by the Ministry of Culture, Sports, and Tourism every five years have presented media globalization policy tasks with continuity and specificity based on laws and government budgets, and positive effects came to be expected based on the relationship between tasks. However, it was pointed out that excessive government intervention should be refrained from. In addition, a number of academic articles related to media globalization and globalization policy were published in the media field over the decades, but not so many of them have influenced or been influenced by policy discourse, reflecting the lack of coommunication between academic and policy discouses. Based on the results, suggestions to promote globalization in future media policies and topics related to globalization in media research were proposed.