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상황버섯(Phellinus linteus) 자실체 분비물의 면역활성 및 항암효과
맹은호,이연태,조규봉,홍승희,Maeng, Eun-Ho,Lee, Yun-Tai,Cho, Kyu-Bong,Hong, Seung-Hee 대한면역학회 2002 Immune Network Vol.2 No.2
Background: The chemical characteristics of the exo-secretion from Phellinus linteus (referred to as exo-secretion) including the compositions of amino acids and monosaccharides were investigated. In addition, cytotoxicity of the exo-secretion on 5 tumor cell lines derived from human cancers and its antitumor activity against ascitic sarcoma-180 cells were examined. Methods: The antitumor activity of exo-secretion from Phellinus linteus was determined by measuring parameters including tumor weight, life span of mice, chemotatic activity of leukocytes, counts of immune cells, and activity of cytokines. Results: The exo-secretion from Phellinus linteus showed no direct cytotoxicity to the five tumor cell lines tested, but it had a strong antitumor activity against sarcoma-180 cells in ICR mice as measured by tumor weight and life span of mice. The exo-secretion stimulated the chemotaxis of leukocytes and production of immune cells and cytokines. Conclusion: These results suggest that the exo-secretion from Phellinus linteus do not act as a direct cytotoxic substance to cancer cells but as an immunomodulator.
STANDARDS IN APRIL 보건의 날 - 의료기기 제조사에 대한 국가적 지원과 신뢰성 확보해야
맹은호,Maeng, Eun-Ho 기술표준원 2011 기술표준 Vol.110 No.-
4월 7일은 세계보건기구(WHO) 발족을 기념하는 '세계 보건의 날'이다. 고령화사회가 됨에 따라 의료기기 시장이 커지고 있다. 국제표준화 동향에 대한 조사 분석과 정보를 관련 산업체에 제공하는 등 의료기기 국제경쟁력 확보를 위한 지원이 필요하다.
문지영 ( Ji Young Moon ),맹은호 ( Eun Ho Maeng ),박학수 ( Hak Soo Park ),권민 ( Min Kwon ),장동혁 ( Dong Hyouk Jang ),조영민 ( Young Min Cho ),고은옥 ( Eun Ok Koh ),성하정 ( Ha Jung Sung ),박철범 ( Cheol Beom Park ) 한국동물실험대체법학회 2007 동물실험대체법학회지 Vol.1 No.1
Reconstructed skin provides advantages to single cell culture testing and leads to promising results as shown by different validation studies. In this study we investigated the efficacy of MCTT Skin model compared with EPI-200 and in vivo test. We conducted endpoint analysis including cell viability (MTT reduction, CCK-8) and IL-1 alpha release. Sodium lauryl sulfate(20%), Potassium hydoxide(5%), Heptanal, Methyl palmitate, 1,1,1-Trichloroethane, 2,4-Xylidine, 3,3`-Dithiodipropionic acid, 4-Amino-1,2,4-triazol and Benzyl chloroformate were selected for this comparison. Potassium hydoxide(5%) and Benzyl chloroformate were excluded from animal tests because of their pH. Sodium lauryl sulfate induced severe irritation, Heptanal induced moderate irritation. Methyl palmitate, 1,1,1-Trichloroethane induced mild irritation. 2,4-Xylidine, 3,3`-Dithiodipropionic acid, 4-Amino-1,2,4-triazole induced no irritation on rabbit skin irritation test. Results of MTT assay and CCK-8 assay were not different between EPI-200 MCTT Skin model but IL-lα levels of some test items different between EPI-200 and MCTT Skin model. We concluded that this MCTT Skin model is useful for alternative skin irritation test, although other tests should be conducted for many other chemicals in international validation study.
문지영 ( Ji Young Moon ),맹은호 ( Eun Ho Maeng ),박학수 ( Hak Soo Park ),권민 ( Min Kwon ),장동혁 ( Dong Hyouk Jang ),조영민 ( Young Min Cho ),고은옥 ( Eun Ok Koh ),성하정 ( Ha Jung Sung ),박철범 ( Cheol Beom Park ) 한국동물실험대체법학회 2007 동물실험대체법학회지 Vol.1 No.1
Reconstructed skin provides advantages to single cell culture testing and leads to promising results as shown by different validation studies. In this study we investigated the efficacy of "MCTT Skin model" compared with "EPI-200" and in vivo test. We conducted endpoint analysis including cell viability (MTT reduction, CCK-8) and IL-1 alpha release. Sodium lauryl sulfate(20%), Potassium hydoxide(5%), Heptanal, Methyl palmitate, 1,1,1-Trichloroethane, 2,4-Xylidine, 3,3`-Dithiodipropionic acid, 4-Amino-1,2,4-triazol and Benzyl chloroformate were selected for this comparison. Potassium hydoxide(5%) and Benzyl chloroformate were excluded from animal tests because of their pH. Sodium lauryl sulfate induced severe irritation, Heptanal induced moderate irritation. Methyl palmitate, 1,1,1-Trichloroethane induced mild irritation. 2,4-Xylidine, 3,3`-Dithiodipropionic acid, 4-Amino-1,2,4-triazole induced no irritation on rabbit skin irritation test. Results of MTT assay and CCK-8 assay were not different between EPI-200 MCTT Skin model but IL-lα levels of some test items different between EPI-200 and MCTT Skin model. We concluded that this MCTT Skin model is useful for alternative skin irritation test, although other tests should be conducted for many other chemicals in international validation study.
식약처에서 허가된 집속형 ESWT 치료기의 음향 출력 분석
최민주,전성중,권오빈,이민영,조진식,김한수,맹은호 한국음향학회 2020 韓國音響學會誌 Vol.39 No.4
Extracorporeal Shock Wave Therapy (ESWT) is an innovative treatment in chronic musculoskeletal pain management and cardiovascular diseases. In this study, we surveyed the acoustic shock wave outputs from the domestically used focal type ESWT devices. The survey data were collected through 30 technical documents registered to the Ministry of Food and Drug Safety (MFDS), Rep. Korea. The results show that the focusing geometry varies largely, 5 mm to 65 mm in the focal length, 3 mm to 30 mm in focal width, and 4 mm to 108 mm in focal depth. The maximum positive pressure (P+) ranges from 7 MPa to 280 MPa, the focal Energy Flux Density (EFD) from 0.0035 mJ/mm2 to 35 mJ/mm2, and the energy per pulse (E) from 0.737 mJ to 80.86 mJ. All domestic PE-type (five) and one EM-type domestic devices included in the analysis of the correlation between P+ and EFD are shown to be far beyond the usual ranges and do not comply with expected correlation so that the reliability of their data was suspected. For the suspected, post-performance tests are required by a recognized testing agency. MFDS guidelines need to be revised so that the pass criteria for the shock wave acoustic outputs can be based on the clinical tests for indications. 체외충격파치료술(Extracorporeal Shock Wave Therapy, ESWT)은 보존적인 치료가 어려운 근골격계 난치성 통증 치료 뿐 아니라 심혈관계 질환까지 적용 분야가 확대되고 있는 혁신적인 치료술이다. 본 연구에서는 국내에서사용되는 집속형 ESWT 치료기의 성능을 결정하는 충격파 음향 출력의 분포를 조사했다. 분석에 사용된 데이터는 식약처에 등록된 30개 기술 문서를 통해 수집했다. 조사 결과, ESWT 치료기 충격파의 집속 특성은, 초점 거리가 5 mm ~ 65 mm, 초점 폭이 3 mm ~ 30 mm, 초점 깊이가 4 mm ~ 108 mm 범위에서 변화하고 있다. 충격파의 최대 양압(P+)는7 MPa ~ 280 MPa, 초점에서 에너지 밀도 Energy Flux Density(EFD)는 0.0035 mJ/mm2 ~ 35 mJ/mm2, 펄스당 에너지(E)는 0.737 mJ ~ 80.86 mJ로 매우 넓은 범위에서 분포하고 있다. P+ 및 EFD 상관성 분석에 포함된 모든 국내산 PE 방식 제품(5개) 및 1개의 EM 방식 국산 치료기는 P+ 및 EFD가 통상적인 범위를 크게 벗어나고 있으며, 예상되는 상관성을 따르지 않고 있어, 데이터의 신뢰성을 인정하기 어려운 상태이다. 음향 출력의 값에 신뢰성을 부여하기 어려운 경우, 식약처에서 인정하는 시험 검사 기관을 통해 사후 시험 검사 및 관리가 요구된다. 충격파 음향 출력에 대한 통과 기준이치료기의 적응증에 대한 임상 시험 결과를 근거로 설정될 수 있도록 식약처의 규정 및 가이드라인 개선이 필요하다.
송정민,백홍,이승영,장동혁,서무엽,박길종,맹은호,Song, J.M.,Baek, H.,Lee, S.Y.,Jang, D.H.,Seo, M.Y.,Park, G.J.,Maeng, Eun-Ho 대한의용생체공학회 2013 의공학회지 Vol.34 No.2
The goal of this study is to develop test method for evaluating the drug eluting properties of drug eluting stents (DES). PBS and the detergent solutions, presented by each DES manufacturer, were used for drug release of DES coated with paclitaxel, zotarolimus and everolimus. The drugs which are coating DES were not released by PBS but released by the detergent solutions, finally paclitaxel 83.38%, zotarolimus 103.85% and everolimus 115.78%. It seems that the use of the detergents is necessary in order to release the drugs because those drugs are extremely hydrophobic. In conclusion, using of detergent solutions presented by each manufacturer were suitable for evaluating the drug eluting property of drug eluting stent.