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RISS 인기검색어
- 검색키워드
- 저자 : Yangwon Jeon (검색결과 4 건)
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Assessing the toxic effects of accumulated arsenic on Arabidopsis thaliana
Jinwoo Jang,Yangwon Jeon,Yeonhong Kim,Geupil Jang,Youngdae Yoon 한국응용생명화학회 2024 Journal of Applied Biological Chemistry (J. Appl. Vol.67 No.-
Previous studies have reported that high pesticide and fertilizer use leads to a gradual accumulation of arsenic in soil environments. To understand the effects of arsenic on plant growth, we aimed to analyze the effect of As(III) on plant growth and development using Arabidopsis thaliana as a model plant. The results revealed that various aspects of plant growth, including seed germination and shoot development, were negatively impacted by As(III) treatment, but the effects were not significant. By contrast, root development was strongly suppressed by As(III) exposure, and the extent of suppression was dependent on the concentration of As(III) used. To gain a deeper understanding of adverse effects on root development, we examined the correlation between As(III) exposure and auxin, a key phytohormone responsible for root growth. Visualizing the auxin response in Arabidopsis roots using DR5::VEUNS and IAA2::GFP revealed that As(III) treatment suppressed auxin response in Arabidopsis roots, and this suppression was tightly correlated with the As(III) concentration. Furthermore, we used As(III)-specific bacterial cell-based biosensors to quantify the accumulation of arsenic in plants and establish a correlation with physiological changes. The inhibition of root growth was observed at 0.5 mg/g of As(III) treatment and it was correlated to 0.063 mg of As(III) per 1 g of dried plant. Although further investigations are required to fully assess the toxic effects of arsenic on the physiological properties of plants, the findings presented in this study provide valuable insights for evaluating the toxic effects of accumulated arsenic on plant growth and development.
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Lee Yejin,Jang Jinwoo,Jeon Yangwon,Kim Hyojin,Jang Geupil,Yoon Youngdae 한국응용생명화학회 2021 Applied Biological Chemistry (Appl Biol Chem) Vol.64 No.6
In this study, Arabidopsis thaliana was used as a model system to assess the toxic effects of cadmium on plant development and growth. The germination and growth of A. thaliana was inhibited by Cd(II), and the inhibitory effect was dosage-dependent. The significant decrease of germination rates and root growths of A. thaliana were observed from 50 mg/L and 25 mg/L of CdCl2, respectively. Although both shoot and root growths were suppressed by Cd(II), root developments were more sensitive to Cd(II) than shoot developments, as evidenced by shoot growths observed over 50 mg/L of CdCl2. In the concordance to this result, it was also observed that the expression of DR5::VENUS, a visual marker of auxin response, was dependent on the Cd(II) concentration and was strongly reduced from 5 mg/L of CdCl2. In addition, the E. coli-based biosensors were employed to quantify accumulated Cd(II) in plants to understand the correlation between toxic effects and Cd(II) in plants. As a result, it was revealed that 0.012 mg/g and 0.138 mg/g of Cd(II) in dried plants were corresponded to the concentration inhibiting root developments and root growths, respectively. Although it needs further investigations, the findings play a significant role in assessing the toxic effects of Cd(II) based on the relationship between the toxic effects and accumulated Cd(II) concentrations in plants.
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Relationship between occupational sunlight exposure and the incidence of renal cancer
Hyun-Suk Jang,Jong-Han Leem,Seong Soo Jeon,Shin-Goo Park,Sangyoon Lee,Yangwon Kang,Go Choi,Hyung Doo Kim,Hyeonwoo Ju,Sung Wook Jang,Youna Won,Hwan-Cheol Kim 대한직업환경의학회 2019 대한직업환경의학회지 Vol.31 No.-
Background: The risk factors for renal cancer include smoking, obesity, hypertension, and exposure to trichloroethylene. Recent studies have shown that low sunlight exposure increases the risk of developing a range of cancers, including renal cancer. Given that most of the daytime is spent at work, a lack of occupational sunlight exposure can be a risk factor for renal cancer. Therefore, this study examined the relationship between occupational sunlight exposure and the incidence of renal cancer. Methods: This was a university hospital-based case-control study on renal cancer. Of the 706 newly diagnosed patients with renal cell carcinoma (RCC), 633 cases were selected; 73 who had no occupational history were excluded. In addition, 633 controls were selected from the general population after 1:1 matching with respect to sex, age (within 5 years), and residential area (constituency-level). Information on sunlight exposure by the occupational group was referred to data from France. To estimate the association between occupational sunlight exposure and the RCC risk, the odds ratios (ORs) were calculated using conditional logistic regression analysis. Results: Sunlight exposure was divided into quartiles and the risk of RCC was analyzed. The adjusted OR of RCC (OR: 0.664, 95% confidence interval: 0.449–0.983) was significantly lower for the Q4 group than Q1 group but the Q2 and Q3 groups did not show significant results. The risk of RCC tended to decrease with increasing exposure to sunlight (p for trend < 0.028). Conclusions: Higher occupational sunlight exposure reduces the risk of RCC.
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