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김광진,박정휘,Ivan Wall,김해원 한국조직공학과 재생의학회 2016 조직공학과 재생의학 Vol.13 No.3
Adipose-derived stem cells (ADSCs) are an attractive source of material for mesenchymal stem cell research due to the abundance of adipose and relative ease of access compared with bone marrow. A key consideration for research is whether cell isolation methods can be improved, to reduce the process steps needed to isolate and expand cell material. In the current study, we used macroporous biopolymer microcarriers to isolate primary ADSCs. We found that the method was capable of isolating ADSCs that were subsequently capable of being transferred to culture dishes and expanded in vitro. Moreover, flow cytometry revealed that they expressed typical stem cell markers and were capable of undergoing tri-lineage differentiation. In summary, it is feasible to use biopolymer microcarriers for retrieval of viable ADSCs that retain identity markers of stem cell function.
葦莖湯·加味葦莖湯의 A549에 對한 細胞毒性과 S-180에 對한 抗癌效果
김성훈,박정휘,박경식,김동희 대한동의병리학회 1995 동의생리병리학회지 Vol.9 No.2
연구배경 : 폐암은 최근 암사망률 중 17%로 위암과 간암에 이어 3위를 차지하고 있어 이의 치료와 연구는 중요한 과제로 등장하고 있다. 따라서 한의학적 측면에서 폐암에 해당되는 문헌을 찾아보아 이중 폐옹에 사용되는 길경탕과 최근에 각종 암에 다용되는 어성초, 白花蛇설초를 가미한 가미길경탕의 항암 효과 및 항암제와의 병용효과등을 현대적인 실험을 통하여 규명, 폐암에 대한 치료법을 제시하고자 함 방법 : in vitro에서 사람의 肺癌株인 A549에 對한 抗腫瘍效果와 cyclophosphamide(CPM), cisplatin(CPT), adriamycin(ARM), 5-fluorouracil(5-FU) 등의 4種 抗癌劑와의, 相乘作用을 살펴보고, ICR생쥐에 S-180을 腹腔 注射한 後 實驗 藥物을 口腔 投與하여, 生命延長率, 體重變化 및 血液檢査 등을 실시하였다. 결과 : 葦莖湯, 葦莖湯加魚腥草, 葦莖湯家伯花蛇舌草는 모두 肺癌에 對한 抗腫瘍效果가 認定되며, cyclophosphamide나 cisplatind을 倂用하거나 魚腥草나 白花蛇舌草를 加味하였을 경우 보다 效果的인 것으로 나타났다. In order to prove the antitumor effect of Wekyungtang(WKT) that was originated in Bigeubchunkeumyobang(備急千金要方), Wekyungtang with Houttuyniae Herba(WKT-I) and Wekyungtang with Oldenlandiae diffusae Herba(WKT-Ⅱ) on human pulmonary tumor cells experimentally, the studies were done. We evaluated the cytotoxic activity against A549 as well as the synergistic effects with anticancer drugs such as cyclophophamide(CPM), cisplatin (CPT), adriamycin (ARM) and 5-fluorouracil(5-FU) in vitro, and measured body weight, survival time, hematological changes in ICR bearing S-180. The results were obtained as follows: 1. IC50 against A549 was 16.24ug/ml in cyclophophamide (CPM), 8.01ug/ml in cisplatin(CPT), 8.39ug/ml in adriamycin(ARM) and 3.13 in 5-fluorouracil (5-FU) respectively. 2. Inhibitory effect on the adhesion of A549, the ratio of No. of antiadhesive cells to adhesive cells was 26.8/73.2 in WKT, 30.42/69.58 in WKT-Ⅰ and 35.12/64.88 in WKT-Ⅱ at the concentrations of 10-³g/ml, which indicates that antiadhesive effect was shown in the order of WKT-Ⅱ, WKT-Ⅰ, WKT. 3. In vitro the concentrations showing inhibitory growth rate below 55% of control against A549 was recognized in concentration of 10-³g/ml of WKT, the synergistic effect with CPM was shown in the concentration of 10-5 g/ml above of WKT, concentrations of WKT-Ⅰ, 10-³g/ml of WKT-Ⅱ, the syneristic effect with CPT was shown in the concentration of 10-5 g/ml above of WKT-Ⅱ, the synergistic effect with ARM was shown in concen -tration of 10-³g/ml of WKT-Ⅰ, WKT-Ⅱ, the synergistic effect with 5-FU was shown in concentration of 10-³g/ml WKT, WKT-Ⅰ, which indicated that CPT, CPM had the synergistic action with WKT. 4. In vivo, the gaining of body weight was significantly suppressed in all groups as compared with control group bearing S-180 and ILS was 10.45% in WKT, 16.43% in WKT-Ⅰ, 21.82% in WKT-Ⅱ respectively. 5. The number of platelet was significantly increased in WKT, WKT-Ⅰ and platelet aggregation was significantly increased in all roup as compared with control group. From the above results it was concluded that Wekyungtang and Kami-Wekyungtang had antitumor effect against A549 and wekyungtang combined with Houttuyniae Herba or Oldenlandiae difusae Herba was more effective than wekyungtang only, also cyclophophamide(CPM), cisplatin(CPT) exerted the more synergistic effect in the anticancer drugs.
실시간 원격 제어 및 점검이 가능한 IoT와 클라우드 기반의 스마트거실제연시스템에 관한 연구
유철민,박정휘,장동하 한국화재소방학회 2023 한국화재소방학회논문지 Vol.37 No.1
Currently, fire zone smoke control systems are installed with other systems, such as indoor air control, lighting, andcommunication, in large scale buildings, such as exhibition halls, marts, and multiplex malls, making it difficult to access andidentify the required system. Additionally, most fire zone smoke control equipment are installed in a high position and mostof the places are covered the ceiling with finishing material after installation, so inspection and maintenance are difficult anddangerous. By developing a smart fire zone smoke control system, an authorized person can remotely inspect and control itvia the internet. Additionally, the real-time self-testing function enables constant inspection and confirmation. Furthermore, thesmart living room ventilation system is installed in a duct dedicated to smoke control or combined with air conditioning andventilation to ensure reliable smoke control performance. By remotely controlling the smart living room ventilation systemaccording to the fire site, it is possible to delay the smoke descent time to the minimum and secure a safe evacuation route. 현재 거실제연 설비는 대형 전시장, 대형 마트, 멀티플렉스 몰 등 대규모 건물내에 실내 공기 제어, 조명, 통신설비등 다양한 목적의 설비와 복잡하게 설치되어 있어 접근이 어려울 뿐만 아니라 어떤 설비인지 식별이 어렵다. 또한대부분의 거실제연 설비는 높은 위치에 설치되고, 설치된 후에 마감처리를 하는 곳이 대부분이기 때문에 점검 및유지보수가 굉장히 어렵고 위험하다. 본 연구에서 스마트 거실제연시스템을 개발함으로써 권한을 가진 관계자가 인터넷이 가능한 장소에서 원격 점검 및 제어를 할 수 있으며, 실시간 자가진단 기능으로 상시 점검 및 확인이 가능하다. 또한, 스마트 거실제연시스템은 제연 전용 또는 공조와 제연 겸용 덕트에 설치되어도 확실한 제연 성능을 확보할수 있으며, 화재 발생시 연기감시용 CCTV로 실시간 재난현장을 정확히 파악할 수 있고 재난 현장의 상황에 맞게거실제연 설비를 원격으로 제어함으로써 연기 하강시간을 최대한 늦출 수 있어 안전한 피난경로를 확보할 수 있다.