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초분광 영상을 이용한 딸기 역병(Phytophthora cactorum) 반응 측정
진효정(Hyo Jeong Jin),윤석한(Seok Han Yoon),김우일(Uil Kim),황연현(Yeon Hyeon Hwang),장영호(Young Ho Jang),강경석(Kyeong Suk Kang) 한국원예학회 2021 한국원예학회 학술발표요지 Vol.2021 No.10
딸기 역병은 Phytophthora cactorum에 의해 여름 고온기와 수확 초기에 관부, 뿌리, 꽃대, 잎 등에서 발생하며 갈변되는 증상을 보인다. 역병은 토양과 물에 의한 전염으로 발생하기 때문에 병이 발생하면 작물보호제로 치료가 어렵고 진단을 위해서는 많은 시간이 소요되어 최적 방제시기에 대응하지 못하는 물리적 한계가 존재한다. 따라서 본 연구는 작물의 상태를 측정하는 방법 중 신속·비파괴적 품질 계측 방법인 초분광(400nm ‒ 1000nm) 영상기술을 이용하여 딸기 역병 반응을 조기 진단 하고자 수행하였다. 시험방법은 딸기 ‘금실’ 품종을 대상으로 관부에 상처를 낸 후 유주자 현탁액을 토양관주 하였으며, 초분광 영상을 4월 26일부터 6월 1일까지 37일 동안 측정하였다. 취득한 영상은 ENVI 소프트웨어(ENVI 5.3, Exelis Visual Information, USA)를 이용하여 표준반사판으로 광 보정된 식물체에서 밴드의 반사율을 추출하였다. 육안으로 역병이 나타난 처리구의 초분광 영상을 역추적한 결과 가시적으로 역병이 나타나기 3일전부터 718nm 이상의 비율값에서 처리구들의 차이가 발생함을 확인할 수 있었다. Real-time PCR 결과에서도 Positive인 딸기 역병균과 같이 Melting temperature가 88.50으로 처리구에서도 동일하게 peak를 보였다. 본 연구를 통해 특정 파장의 적외선 영상이 딸기의 역병 반응에 이용될 수 있는 가능성을 확인할 수 있었으며 추가적인 실험을 통해 정확도를 확보해야 할 것으로 판단된다.
NF-κB와 MAPK억제를 통한 시호소간탕(柴胡疏肝湯)의 항염증효과
진효정,박상미,김예림,변성희,김상찬,Hyo Jeong Jin,Sang Mi Park,Ye Lim Kim,Sung Hui Byun,Sang Chan Kim 대한한의학방제학회 2023 大韓韓醫學方劑學會誌 Vol.31 No.2
Objectives : Sihosogan-tang (SST) is one of the traditional herbal formula and also one of the Korean medical insurance medicines. It commonly used in the treatment of hepatitis, chronic gastritis, intercostal neuralgia, pleurisy, and depression in East Asia. In the present study, we have demonstrated the anti-inflammatory effects of SST in macrophage cell line. Methods : To investigate mechanism of the anti-inflammatory effect of SST, we examined the productions of nitric oxide (NO) and pro-inflammatory cytokines, and the expressions of inducible NO synthase (iNOS), nuclear factor-κ B (NF-κB) and mitogen-activated protein kinase (MAPK) on RAW 264.7 cells activated by LPS. Results : SST significantly inhibited the expression of iNOS increased by LPS, and also significantly inhibited the production of NO. In addition, SST significantly inhibited pro-inflammatory cytokines such as TNF- α and interleukines. SST inhibited the expression of NF-κB and MAPK activation. Conclusions : These results suggest that SST ameliorates inflammatory response in LPS-activated RAW 264.7 cells through the inhibition of the NF-κB and MAPK pathway. Therefore, this study supplies objective evidence for the anti-inflammatory effect of SST.
Nrf2 활성화를 통한 익위승양탕(益胃升陽湯)의 간세포 보호 효과
진효정,박상미,김은옥,김상찬,Jin, Hyo Jeong,Park, Sang Mi,Kim, Eun Ok,Kim, Sang Chan 대한한의학방제학회 2021 大韓韓醫學方劑學會誌 Vol.29 No.4
Objectives : Oxidative stress is a important cause of liver disease, and regulation of oxidative stress is essential to maintain the normal metabolic function of the liver. Until a recent date, there has been no studies on the hepatoprotective effect of Ikwiseungyang-tang (IWSYT). Therefore, this study aims to demonstrate the hepatoprotective effect of IWSYT and its related molecular mechanisms on arachidonic acid (AA) + iron induced oxidative stress model in HepG2 cells. Methods : To determine the cytoprotective effect of IWSYT against AA + iron-induced oxidative stress, cell viability, apoptosis-related proteins, intracellular reactive oxygen species (ROS), GSH, and mitochondrial membrane potential (MMP) were measured. Nuclear factor erythroid 2-related factor 2 (Nrf2) activation was analyzed by immunoblot analysis. In addition, Nrf2 transcription activation through ARE binding was measured by reporter gene assays, and the expression of the Nrf2 target antioxidant genes were confirmed by immunoblot analysis. Results : IWSYT increased cell viability from cell death induced by AA + Iron, and inhibited apoptosis by regulating apoptosis-related proteins. Furthermore, IWSYT protected cells by inhibiting intracellular ROS production, GSH depletion, and MMP degradation. Nrf2 activation was increased by IWSYT, and Nrf2 target genes were activated by IWSYT too. Conclusions : These results suggest that IWSYT can protect hepatocytes from oxidative stress through Nrf2 activation and can be potentially applied in the prevention and treatment of liver damage.
Nrf2활성화를 통한 삼출건비탕(蔘朮健脾湯)의 간세포보호효과
김예림,진효정,박상미,변성희,송창현,김상찬,Ye Lim Kim,Hyo Jeong Jin,Sang Mi Park,Sung Hui Byun,Chang Hyun Song,Sang Chan Kim 대한한의학방제학회 2023 大韓韓醫學方劑學會誌 Vol.31 No.2
Objectives : Oxidative stress is an important cause of many diseases including liver injury. Therefore, adequate regulation of oxidative stress plays a pivotal role in maintaining liver function. Until recently, there has been no studies on the hepatoprotective effect of Samchulgeonbi-tang (SCGBT). Therefore, the hepatoprotective effect of SCGBT was investigated in HepG2 cells. In this study, oxidative stress was induced by arachidonic acid (AA) and iron. Methods : To analyze the hepatoprotective effects of SCGBT against oxidative stress induced by AA + iron, the cell viability, apoptosis-related proteins and intracellular ROS, glutathione (GSH), and mitochondrial membrane permeability (MMP) were measured. In addition, nuclear factor erythroid 2-related factor 2 (Nrf2) transcription activation and expressions of Nrf2 target gene were analyzed through immunoblot analysis. Results : SCGBT increased the cell viability from AA + iron - induced cell death and inhibited apoptosis by regulating apoptosis related proteins. SCGBT protected cells by inhibiting ROS production, GSH depletion, and MMP degradation against AA + iron induced oxidative stress. Furthermore, Nrf2 activation was increased by SCGBT, and the Nrf2 target genes were also activated by SCGBT. Conclusions : These results suggest that the SCGBT has a hepatocyte protection effect and antioxidant effect from AA + iron induced oxidative stress.