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Choudhry, Qaisra Naheed,Kim, Jun Ho,Cho, Hyung Taek,Heo, Wan,Lee, Jeong-Jun,Lee, Jin Hyup,Kim, Young Jun The Korean Society of Ginseng 2019 Journal of Ginseng Research Vol.43 No.2
Background: Oxidative stress induces the production of reactive oxygen species (ROS), which play important causative roles in various pathological conditions. Black ginseng (BG), a type of steam-processed ginseng, has drawn significant attention due to its biological activity, and is more potent than white ginseng (WG) or red ginseng (RG). Methods: We evaluated the protective effects of BG extract (BGE) against oxidative stress-induced cellular damage, in comparison with WG extract (WGE) and RG extract (RGE) in a cell culture model. Ethanolic extracts of WG, RG, and BG were used to evaluate ginsenoside profiles, total polyphenols, flavonoid contents, and antioxidant activity. Using AML-12 cells treated with $H_2O_2$, the protective effects of WGE, RGE, and BGE on cellular redox status, DNA, protein, lipid damage, and apoptosis levels were investigated. Results: BGE exhibited significantly enhanced antioxidant potential, as well as total flavonoid and polyphenol contents. ATP levels were significantly higher in BGE-treated cells than in control; ROS generation and glutathione disulfide levels were lower but glutathione (GSH) and NADPH levels were higher in BGE-treated cells than in other groups. Pretreatment with BGE inhibited apoptosis and therefore protected cells from oxidative stress-induced cellular damage, probably through ROS scavenging. Conclusion: Collectively, our results demonstrate that BGE protects AML-12 cells from oxidative stress-induced cellular damages more effectively than WGE or RGE, through ROS scavenging, maintenance of redox status, and activation of the antioxidant defense system.
일부 대학생의 SNS 사용시간에 따른 자아존중감과 대인관계의 관련성
손희주(HeeJu Son),임나의(Nahee Im),오수현(Suhyeon Oh),박혜빈(Hyebin Park),김경민(Kungmin Kim),김지현(Jihyeon Kim),정금비(Geumbi Jeong),윤현서(Hyunseo Yoon),이정화(JungHwa Lee) 인문사회과학기술융합학회 2018 예술인문사회융합멀티미디어논문지 Vol.8 No.5
본 연구는 일부 대학생의 SNS 사용시간에 따른 자아존중감과 대인관계의 관련성을 파악하고자 시도하였다. 연구기간은 2017년 3월15일부터 2017년 6월 20일까지였으며, 연구대상은 부산지역 대학생 421명이었다. 연구도구는 설문지를 사용하여 SNS 사용문제척도, 자아존중감척도, 대인관계문제척도를 사용하였으며, 자료 분석은 SPSS 프로그램을 사용하였다. 분석결과 SNS사용자들 중 사용하는 이유로‘뒤쳐지고 싶지 않아서’라고 응답한 군에서 SNS사용 문제가 상대적으로 높았고, ‘정보를 얻기 위해서’라고 응답한 군에서는 문제가 상대적으로 낮았다(F=3.674, p=0.000). SNS를 사용하는 시간이 ‘3시간 이상’인 집단에서 상대적으로 자아존중감이 높게 나타났고(F=0.930, p=0.396), SNS를 사용하는 시간이 많을수록 대인관계 문제가 높게 나타났다(F=4.535 p=0.011). 이를 종합 해 보았을 때, SNS 사용시간이 많을수록 SNS 사용으로 인한 문제와 대인관계에 문제가 많았고, 자아존중감은 높아졌다. 그러므로 대인관계를 유지할 수 있도록 오프라인에서 대인관계 강화를 위한 멘토링 및 집단상담 프로그램 등의 확대운영이 필요할 것으로 사료된다. The purpose of this study was to understand the relationship between self esteem and interpersonal relationship between self esteem and interpersonal relationships based on hours of SNS usage time among some university students. The research was conducted from March 15 to June 20, 2017, the subjects of this study were 421 students enrolled in the Busan area. The research tool used a questionnaire measuring problems of SNS usage problem, self esteem scale and interpersonal relations scale and data analysis was used SPSS program. The results showed that the use of SNS was relatively high in the group that responded I do not want to lag , and the problem was relatively low in the group that responded to get information (F=3.674, p=0.000). The self – esteem was relatively high in the group using the SNS for more than 3 hours (F=0.930, p=0.396), and the interpersonal problem was higher in the group using the SNS(F=4.535 p=0.011). In sum, the more time the SNS was used, the more problems and interpersonal problems caused by the use of SNS, and the self-esteem increased. Therefore, in order to maintain interpersonal relationship, it is necessary to expand mentoring and group counseling programs for strengthening interpersonal relationship in offline.
감경윤,Seong Jin Yu,Nahee Jeong,홍정화,Angela M. A. Anthony Jalin,Sungja Lee,최용원,이채관,강성구 한국분자세포생물학회 2011 Molecules and cells Vol.31 No.3
The therapeutic goal in treating cerebral ischemia is to reduce the extent of brain injury and thus minimize neurological impairment. We examined the effects of p-hydro-xybenzyl alcohol (HBA), an active component of Gastrodia elata Blume, on transient focal cerebral ische-mia-induced brain injury with respect to the involvement of protein disulphide isomerase (PDI), nuclear factor-E2-related factor 2 (Nrf2), and neurotrophic factors. All animals were ovariectomized 14 days before ischemic injury. Ischemic injury was induced for 1 h by middle cerebral artery occlusion (MCAO) followed by 24-h reperfusion. Three days before MCAO, the vehicle-treated and the HBA-treated groups received intramuscular sesame oil and HBA (25 mg/kg BW), respectively. 2,3,5 Triphenyltetrazolium chloride (TTC) staining showed decreased infarct volume in the ischemic lesion of HBA-treated animals. HBA pretreatment also promoted functional recovery, as measured by the modified neurological severity score (mNSS; p < 0.05). Moreover, expression of PDI, Nrf2, BDNF, GDNF, and MBP genes increased by HBA treatment. In vitro, H_2O_2 induced PC12 cell death was prevented by 24 h HBA treatment, but bacitracin, a PDI inhibitor, attenuated this cytoprotective effect in a dose-dependent manner. HBA treatment for 2 h also induced nuclear translocation of Nrf2, possibly activating the intracellular antioxidative system. These results suggest that HBA protects against brain damage by modulating cytoprotective genes, such as Nrf2 and PDI, and neurotrophic factors.