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18β-Glycyrrhetinic acid가 lipopolysaccharide에 의한 생쥐 뇌조직의 염증성 사이토카인과 해마신경세포 자연사에 미치는 영향
이지승,권만재,권수현,김지호,문지영,조윤정,신정원,이종수,손낙원,Lee, Ji-Seung,Kwon, Man-Jae,Kweon, Su-Hyeon,Kim, Jeeho,Moon, Ji-Young,Cho, Yoon-Cheong,Shin, Jung-Won,Lee, Jong-Soo,Sohn, Nak-Won 대한본초학회 2016 大韓本草學會誌 Vol.31 No.6
Objectives : $18{\beta}$-Glycyrrhetinic acid (18betaGA) is an metabolite of glycyrrhizin in Glycyrrhiza (licorice). The present study investigated anti-inflammatory and anti-apoptosis effect of 18betaGA on the brain tissue of lipopolysaccharide (LPS)-treated C57BL/6 mice. Methods : 18betaGA was administered orally with low (30 mg/kg) and high (100 mg/kg) doses for 3 days prior to LPS (3 mg/kg) injection. Pro-inflammatory cytokines mRNA including tumor necrosis factor-${\alpha}$ (TNF-${\alpha}$), interleukin (IL)-$1{\beta}$, IL-6, and inflammatory enzyme cyclooxygenase-2 (COX-2) mRNA were measured in the cerebral cortex, hippocampus, and hypothalamus tissue using real-time polymerase chain reaction at 24 h after the LPS injection. Histological changes of Cornu ammonis area 1 (CA1) neurons, Bax, Bcl-2, and caspase-3 expression in the hippocampus was also evaluated by immunohistochemistry and Western blotting method. Results : 18betaGA significantly attenuated the up-regulation of TNF-${\alpha}$, IL-$1{\beta}$, IL-6 mRNA, and COX-2 mRNA expression in the brain tissues induced by the LPS injection. 18betaGA also significantly attenuated the reductions of the thickness of CA1 and the number of CA1 neurons. The up-regulation of Bax protein expression in the hippocampal tissue by the LPS injection was significantly attenuated, while the ratio of Bcl-2/Bax expression was increased by 18betaGA treatment. 18betaGA also significantly attenuated the up-regulation of Bax and caspase-3 expression in the CA1 of the hippocampus. Conclusion : This results indicate that 18betaGA has anti-inflammatory and anti-apoptosis effect under neuroinflammation induced by the LPS injection and suggest that 18betaGA may be a beneficial drug for various brain diseases accompanied with the brain tissue inflammation.
18β-Glycyrrhetinic acid가 lipopolysaccharide에 의한 생쥐 뇌조직의 염증성 사이토카인과 해마신경세포 자연사에 미치는 영향
이지승 ( Ji-seung Lee ),권만재 ( Man-jae Kwon ),권수현 ( Su-hyeon Kweon ),김지호 ( Jeeho Kim ),문지영 ( Ji-young Moon ),조윤정 ( Yoon-cheong Cho ),신정원 ( Jung-won Shin ),이종수 ( Jong-soo Lee ),손낙원 ( Nak-won Sohn ) 대한본초학회 2016 大韓本草學會誌 Vol.31 No.6
Objectives : 18β-Glycyrrhetinic acid (18betaGA) is an metabolite of glycyrrhizin in Glycyrrhiza (licorice). The present study investigated anti-inflammatory and anti-apoptosis effect of 18betaGA on the brain tissue of lipopolysaccharide (LPS)-treated C57BL/6 mice. Methods : 18betaGA was administered orally with low (30 ㎎/㎏) and high (100 ㎎/㎏) doses for 3 days prior to LPS (3 ㎎/㎏) injection. Pro-inflammatory cytokines mRNA including tumor necrosis factor-α (TNF-α), interleukin (IL)-1β, IL-6, and inflammatory enzyme cyclooxygenase-2 (COX-2) mRNA were measured in the cerebral cortex, hippocampus, and hypothalamus tissue using real-time polymerase chain reaction at 24 h after the LPS injection. Histological changes of Cornu ammonis area 1 (CA1) neurons, Bax, Bcl-2, and caspase-3 expression in the hippocampus was also evaluated by immunohistochemistry and Western blotting method. Results : 18betaGA significantly attenuated the up-regulation of TNF-α, IL-1β, IL-6 mRNA, and COX-2 mRNA expression in the brain tissues induced by the LPS injection. 18betaGA also significantly attenuated the reductions of the thickness of CA1 and the number of CA1 neurons. The up-regulation of Bax protein expression in the hippocampal tissue by the LPS injection was significantly attenuated, while the ratio of Bcl-2/Bax expression was increased by 18betaGA treatment. 18betaGA also significantly attenuated the up-regulation of Bax and caspase-3 expression in the CA1 of the hippocampus. Conclusion : This results indicate that 18betaGA has anti-inflammatory and anti-apoptosis effect under neuroinflammation induced by the LPS injection and suggest that 18betaGA may be a beneficial drug for various brain diseases accompanied with the brain tissue inflammation.
차세대중형위성 3호 과학탑재체 바이오캐비넷용 수동형 진동절연기의 발사진동 저감성능 검증
서동재(Dong-Jae Seo),박연혁(Yeon-Hyeok Park),이영진(Young-Jin Lee),이지승(Ji-Seung Lee),김경희(Kyung-Hee Kim),김순희(Soon-Hee Kim),박찬흠(Chan-Hum Park),오현웅(Hyun-Ung Oh) 항공우주시스템공학회 2024 항공우주시스템공학회지 Vol.18 No.4
차세대 중형위성 3호의 탑재체 중 바이오캐비넷은 우주공간에서 바이오 3D프린팅 기법을 이용한 3차원 줄기세포 분화, 배양 및 분석 임무를 수행한다. 상기 3D 프린팅 기법은 궤도환경에서 사용을 목적으로 개발되었으나, 극심한 발사환경에 대한 별도의 검증이 이루어지지 않아 탑재체에 전달되는 발사하중을 저감 시키는 설계가 필수적이다. 본 논문에서는 바이오캐비넷에 전달되는 발사하중 저감을 위해 저강성 탄성 지지구조 적용 및 고댐핑 특성을 부여한 수동형 진동절연기를 제안하였으며, 고댐핑 특성을 부여하기 위해서 초탄성 형상기억합금의 초탄성 효과와 점탄성 테이프를 이용한 적층형 구조에 주목하였다. 제안한 진동절연기 인증모델에 대한 발사진동시험을 통해 설계유효성을 검증하였다. The payload BioCabinet of CAS500-3 is designed for 3D stem cell differentiation, culture, and analysis utilizing bio 3D printing techniques in space. The 3D printing technique was initially developed for orbital use; however, it lacks separate validation for extreme launch vibration environments, necessitating a design that mitigates the launch load on the payload. This paper proposes a passive vibration isolator with a low-stiffness elastic support structure and high damping characteristics to reduce the launch loads affecting the BioCabinet. We explore the high-damping characteristics through the superelastic effects of SMA (Shape Memory Alloys) and a multi-layered structure incorporating viscoelastic tape. The effectiveness of the proposed vibration isolation system was confirmed via launch vibration tests on a qualification model.
국토안전분야 주요 이슈에 대한 AI기반 비정형데이터 분석 모델
전인택 ( Jeon In-taek ),정현준 ( Jung Hyunjun ),황윤호 ( Hwang Yun-ho ),박소영 ( Park So-young ),김민수 ( Kim Min-soo ),이지승 ( Lee Ji-seung ) 한국구조물진단유지관리공학회 2022 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.26 No.2
본 연구는 국가 안전 정책수립에 활용하기 위해 인공지능을 기반으로 국토안전분야 주요 이슈되어 언급되는 인터넷 뉴스 등 언론, 국민의 여론의 주요 안전 키워드를 분석할 수 있는 비정형데이터 분석 모델을 개발하였다.