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- 저자 : 조남준(Namjoon Cho) (검색결과 4 건)
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자초(紫草) 열수추출물이 각질형성세포 HaCaT의 세포 연접 관련 유전자의 발현에 미치는 영향 연구
조남준 ( Namjoon Cho ),이병권 ( Byeongkwon Lee ),이웅희 ( Woonghee Lee ),김기광 ( Keekwang Kim ),김균언 ( Kyoon Eon Kim ),한효상 ( Hyosang Han ) 대한본초학회 2017 大韓本草學會誌 Vol.32 No.3
Objectives : The aim of this research was to determine the diverse effects of Lithospermi Radix Water Extract (LR) on human keratinocyte HaCaT cells, and to examine whether those effects could be applied to the human skin. Methods : We examined effect of LR on the cell viability of using the MTS assay in human keratinocyte HaCaT cells. The antioxidation effect of LR was analyzed relative to the well-known antioxidant resveratrol, using an ABTS assay. Quantitative RT-PCR analysis revealed that, in HaCaT cells, LR influenced the mRNA expression of tight-junction genes associated with skin moisturization. Furthermore, a wound-healing assay demonstrated altered cell migration in LR-treated HaCaT cells. Result : The cytotoxicity was confirmed to be higher in LR at a concentration of 800 ㎍/㎖ using the MTS assay in HaCaT cells. In comparison to 100 μM resveratrol, 1,600 ㎍/㎖ LR showed either a similar or superior antioxidation effect. LR treatment in HaCaT cells reduced the mRNA expression levels of claudin 3, claudin 4, claudin 6, claudin 8, and ZO-2 to less than 0.80-fold, whereas JAM-A and Tricellulin mRNA expression level increased more than 1.33- fold. In addition, HaCaT cells migration was decreased to 83.9% by LR treatment. Conclusions : LR of antioxidation activity will have an anti-aging effect on the skin by reducing oxidative stress. Further studies are required to address the implications for human skin, given LR`s effects of altering mRNA expression of tight junction-related gene and decreasing cell migration of HaCaT cells.
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백소정(So-Jeong Baek),조남준(Namjoon Cho),조성진(Sung-Jin Cho),김은미(Eun-Mi Kim),김기광(Kee Kwang Kim) 한국생물공학회 2020 KSBB Journal Vol.35 No.2
Sulfonylurea treatment is used for diabetes mellitus, a metabolic disease caused by abnormal absorption of glucose in the body. But it is accompanied by side effects in vivo when taken for a long time. Therefore, there is a need for research on natural materials having similar effects to these therapeutic agents and having fewer side effects that can effectively regulate blood sugar. In this study, we investigated the antioxidative efficacy of Sparassis crispa (S. crispa) extract and the activity of ATP, glycolysis, and mitochondrial membrane potential using human hepatocyte HepG2 cells. As a result, S. crispa extract showed high antioxidant activity and induced a significant increase in HepG2 cell activity and ATP production. S. crispa extract also significantly accelerated the process and mitochondrial membrane potential. Taken together, these results suggest that S. crispa extract has the potential to be developed as a natural material for improving diabetic and diabetic complications by activating hepatic energy metabolism.
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최선경(Sunkyung Choi),조남준(Namjoon Cho),김기광(Kee K. Kim) 한국생물공학회 2016 KSBB Journal Vol.31 No.4
Hair loss affects both men and women of all ages and often significantly affects social and psychologic health. Recent therapeutic approach for hair loss such as finasteride and minoxidil focused on regulation of hormonal system blood flow. However, long-term use of these drugs caused adverse effects. To develop herbal medicine for therapeutic effect on hair growth, here we screened the 10 medicinal herbs (Red ginseng, Licorice, Ulmus, Barberry root, Lycium root, Rehmanniae radix crudus, Sophora root, Sweet flag, Polygala root, Achyranthes) based on oriental medicine literature. We measured cytotoxicity, anti-oxidant activity, and 5-α reductase inhibitory effect of the herbal medicine on human dermal papilla (DP) cells to investigate therapeutic effect of the herbal medicine. Treatment of the 1% herbal medicine did not show any cytotoxic effects, and cell growth was increased by treatment of the 0.1% herbal medicine. In addition, the herbal medicine showed stronger antioxidant activity than resveratrol and comparable inhibitory activity of 5-α reductase with finasteride. Furthermore, when applied to in vivo mouse model, we also observed increases in the number and length of hair of the herbal medicine-treated group. These results suggest that the herbal medicine promotes hair growth by its antioxidant activity and inhibitory activity of 5-α reductase and might therefore be a promising hair growth-promoting agent.
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맥문동 열수 추출물이 Poly I:C를 처리한 폐암세포주의 사멸 및 염증성 사이토카인 발현에 미치는 영향
강다연 ( Dayeon Kang ),조남준 ( Namjoon Cho ),렌친핸드 ( Gereltuya Renchinkhand ),이보희 ( Bo-hee Lee ),김은미 ( Eun-mi Kim ),남명수 ( Myoung Soo Nam ),김기광 ( Keekwang Kim ) 대한본초학회 2021 大韓本草學會誌 Vol.36 No.1
Objectives : Virus infection through the respiratory tract causes various inflammatory diseases such as pneumonia, cystic fibrosis, and obstructive pulmonary disease, causing enormous social damage. Therefore, it is very important to develop a treatment and prevention of infectious diseases. In this study, we investigated the effect of water extracts of Liriope muscar i (WELM), known to improve lung function, on the inflammatory response of lung carcinoma cell line A549 cells induced by the viral double stranded RNA mimetic Polyinosinic:polycytidylic acid (Poly I:C). Methods : The cell viability by WELM treatment was analyzed using MTS assay in A549 cells. After inducing an inflammatory response to WELM-treated A549 cells with Poly I:C, the degree of apoptosis was confirmed through bright field microscopy. Interferon beta (IFN-β) mRNA expression level in A549 cells was analyzed by quantitative reverse transcription PCR (qRT-PCR). Results : WELM treatment has no significant effect on cell viability of A549 cells. We confirmed that pre-treatment of WELM effectively reduces the Poly I:C-induced apoptotic cell death in A549 cells. In addition, it was confirmed that the mRNA expression level of IFN-β, a pro-inflammatory cytokine increased by Poly I:C treatment, was significantly suppressed by WELM treatment in A549 cells. Conclusions : These results provide the evidence that WELM is effective at inhibiting inflammation on respiratory viral infections and suggest that Liriope muscari might be a valuable natural substance in the prevention and treatment of infectious diseases.
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