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Association of the G134A and G184C Polymorphisms in the CYP1A1 Gene with Lung Cancer Incidence
Ryu, Doug-Young,Huang, Ming-Ai,Park, Chang-Bo,Chang, Soo-Im,Im, Ruth,Choi, Seong-Jin,Kim, Na-Young,Park, In-Won,Choi, Byoung-Whui,Kim, Jae-Yeol,Shin, Jong-Wook,Choi, Jae-Chul,Choi, Byung-Sun,Park, Jun Korean Society of ToxicologyKorea Environmental Mu 2008 Toxicological Research Vol.25 No.3
The G184C and G134A single nucleotide polymorphisms(SNPs) of the CYP1A1 gene result in Ala62Pro and Gly45Asp substitutions, respectively. Here, we tested whether these SNPs are associated with an alteration in lung cancer incidence. We examined 80 Korean subjects with lung cancer and 240 age- and sex-matched controls. For each subject, the CYP1A1 gene was PCR amplified and sequenced. We observed that the odds ratio(OR) for lung cancer was 3.37 higher in subjects with the G184C polymorphism than in controls(95% confidence interval(CI), $0.89{\sim}12.73$, P=0.07). In contrast, the OR for lung cancer was 1.23 in subjects with the G134A polymorphism compared to controls(95% CI, $0.68{\sim}2.20$, P=0.49). The G184C polymorphism exacerbated the effects of smoking on lung cancer development. Gene-smoking interaction analyses revealed that past or present smokers with the G184C polymorphism had a higher incidence of lung cancer(OR, 24.72; 95% CI, $4.48{\sim}136.31$; P<0.01) than control smokers(OR, 6.65; 95% CI, $2.72{\sim}16.28$; P<0.01). However, there was only a slight difference in the ORs for lung cancer between control smokers and smokers with the G134A polymorphism. These findings suggest that the G184C polymorphism, but not the G134A polymorphism, is associated with an increased risk of lung cancer.
A Single Nucleotide Polymorphism in Transforming Growth Factor-$\beta$ type II Receptor of the Rat
Ryu, Doug-Young Korean Society of ToxicologyKorea Environmental Mu 2000 Toxicological Research Vol.16 No.1
A single nucleotide polymorphism in the transforming growth factor-$\beta$ type II receptor (TGE$\beta$RII) gene of the rat was studied. TGF$\beta$RII is a tumor suppressor that is frequently inactivated by mutation in human colon cancers. A novel nucleotide polymorphism of G to A(or A to G), which causes a silent mutation at codon 129, was found in G:C rich sequence in the TGF$\beta$RII gene of Sprague-Dawley rats. The results suggest that genetic polymorphism occures without a strain of the laboratory animal.
Association of the G134A and G184C Polymorphisms in the CYP1A1 Gene with Lung Cancer Incidence
Doug-Young Ryu,Mingai Huang,Changbo Park,Soo Im Chang,Ruth Im,Seong-Jin Choi,Na-Young Kim,In Won Park,Byoung Whui Choi,Jae Yeol Kim,Jong Wook Shin,Jae Chul Choi,Byung-Sun Choi,Jung-Duck Park 한국독성학회 2008 Toxicological Research Vol.24 No.2
The G184C and G134A single nucleotide polymorphisms (SNPs) of the CYP1A1 gene result in Ala62Pro and Gly45Asp substitutions, respectively. Here, we tested whether these SNPs are associated with an alteration in lung cancer incidence. We examined 80 Korean subjects with lung cancer and 240 age- and sex-matched controls. For each subject, the CYP1A1 gene was PCR amplified and sequenced. We observed that the odds ratio (OR) for lung cancer was 3.37 higher in subjects with the G184C polymorphism than in controls (95% confidence interval (CI), 0.89~12.73, P = 0.07). In contrast, the OR for lung cancer was 1.23 in subjects with the G134A polymorphism compared to controls (95% CI, 0.68~2.20, P = 0.49). The G184C polymorphism exacerbated the effects of smoking on lung cancer development. Gene-smoking interaction analyses revealed that past or present smokers with the G184C polymorphism had a higher incidence of lung cancer (OR, 24.72; 95% CI, 4.48~136.31; P < 0.01) than control smokers (OR, 6.65; 95% CI, 2.72~16.28; P < 0.01). However, there was only a slight difference in the ORs for lung cancer between control smokers and smokers with the G134A polymorphism. These findings suggest that the G184C polymorphism, but not the G134A polymorphism, is associated with an increased risk of lung cancer.
Young-Jae Jeong,Sang-Sun Lim,Hyun-Jin Park,Bo-Seong Seo,Se-In Park,Jin-Hee Ryu,Kyo-Suk Lee,Doug-Young Chung,Han-Yong Kim,Seung-Heon Lee,Hye In Yang,Woo-Jung Choi 한국토양비료학회 2020 한국토양비료학회지 Vol.53 No.1
There are increasing social pressures on the agricultural use of salt-affected reclaimed tideland (RTL) for the cultivation of other crops except for rice. Crop suitability for RTL has conventionally been evaluated using soil salinity alone without consideration of soil texture and water salinity. In this study, the suitability of 10 crops for 12 RTLs under national government’s management was evaluated using soil and water salinity as well as soil texture. The crops include barley (both cereal and forage) (hordeum vulgare), wheat (triticum eastivum), paddy rice (oryza sativa), maize (forage) (zea mays), beet (beta vulgaris), celery (apium graveolens), spinach (spinacia oleracea), broccoli (brassica oleracea var. italic), and tomato (solanum lycopersicum). The results showed that barley and wheat are most suitable winter crops for all RTLs and beet, celery, and maize are more suitable than others as summer crops. The suitability of rice, which is widely cultivated in all RTLs, was not as high as expected in some RTLs, suggesting that it may be possible to consider other crops as alternative summer crops to rice. By using not only soil salinity but also soil texture and water salinity as parameters for crop suitability evaluation, it was possible to recommend suitable crops for each RTL of which soil texture and soil and water salinity differ.
Evaluation of Cropping Model of Green Manure Crops with Main Crops for Upland-Specific
Doug Young Chung,Misuk Park,Jin-Woong Cho,Sang-Eun Lee,Kwang-Hyun Han,Jin-Hee Ryu,Seong-Hoon Hyun 한국토양비료학회 2013 한국토양비료학회지 Vol.46 No.2
For organic farming, green manure crops such as leguminous forages and barley have been broadly used to improve soil fertility and soil physical and chemical properties by repeatedly cutting and mulching them directly as winter crop in the field in the rotation. In this investigation we selected 78 agricultural farm corporations as well as individual organic farmhouses related to crop rotation from greenmanure crops to main crops in order to analyze the relationship of cropping system between main crops and green manure crops. The results showed that the green manure crops were divided into two groups as leguminous and nonleguminous crops, representing that those are limited to specific climate and farming systems of regions. Also the 10 or less green manure crops including sudangrass, hairyvetch, italian ryegrass, sorghun, buckwheat, oat, pea, rye, clover, and canola which belong to leguminous crops which are presently cultivated from the organic farmhouses within the rotational crop system. We also confirmed that the major main crops are sweet potato, soybean, corn, tobacco, spinach from usage frequency analyzed by NetMiner H 2.6 which was used to estimate the rotational cropping system among the green manure crops and main crops.
Ryu, Jin-Hee,Chung, Doug-Young,Ha, Sang-Keon,Lee, Sang-Bok,Kim, Si-Ju,Kim, Min-Tae,Park, Ki-Do,Kang, Hang-Won 한국토양비료학회 2014 한국토양비료학회지 Vol.47 No.6
Serious problems in reclaimed land agriculture are high soil salinity and poor vertical drainage, so desalinization in these soils is very difficult. Also, although desalinization is accomplished in reclaimed top soils, before long, soils are resalinized according to capillary rise of salts from the subsurface soils. To resolve these problems, multi-layered soil columns with subsurface layer of macroporous medium utilizing coal bottom ash (CBA) were constructed and the effects of blocked resalinization of these soils were investigated. In this experiment soil samples were collected from Munpo series (coarse-loamy, nonacid, mixed, mesic, typic Fluvaquents). The soil texture was silt loam and the EC was $33.9dS\;m^{-1}$. As for groundwater seawater was used and groundwater level of 1 cm from the bottom was maintained. The overall rate of capillary rise was $2.38cm\;hr^{-1}$ in soil 60 cm column, $0.25cm\;hr^{-1}$ in topsoil (30 cm) + CBA (5 cm) + subsurface soil (10 cm) column and $0.08cm\;hr^{-1}$ in topsoil (30 cm) + CBA (10 cm) + subsurface soil (10 cm) column. In multi-layered soil columns with CBA 20, 30 cm layer, wetting front due to capillary rise could not be seen in top soil layer. After 70 days capillary rise experiment water soluble Na+ accumulated in top soil of soil columns with CBA 20, 30 cm was diminished by 92.8, 96.5% respectively in comparison with Na+ accumulated in top soil of soil 60 cm column because CBA layer cut off capillary rise of salts from the subsurface soil. From these results we could conclude that the macroporous layer utilizing CBA placed at subsurface layer cut off capillary rise of solutes from subsurface soil, resulting in lowered level of salinity in top soil and this method can be more effective in newly reclaimed saline soil.
Evaluation of Cropping Model of Green Manure Crops with Main Crops for Upland-Specific
Chung, Doug Young,Park, Misuk,Cho, Jin-Woong,Lee, Sang-Eun,Han, Kwang-Hyun,Ryu, Jin-Hee,Hyun, Seong-Hoon 한국토양비료학회 2013 한국토양비료학회지 Vol.46 No.2
For organic farming, green manure crops such as leguminous forages and barley have been broadly used to improve soil fertility and soil physical and chemical properties by repeatedly cutting and mulching them directly as winter crop in the field in the rotation. In this investigation we selected 78 agricultural farm corporations as well as individual organic farmhouses related to crop rotation from greenmanure crops to main crops in order to analyze the relationship of cropping system between main crops and green manure crops. The results showed that the green manure crops were divided into two groups as leguminous and nonleguminous crops, representing that those are limited to specific climate and farming systems of regions. Also the 10 or less green manure crops including sudangrass, hairyvetch, italian ryegrass, sorghun, buckwheat, oat, pea, rye, clover, and canola which belong to leguminous crops which are presently cultivated from the organic farmhouses within the rotational crop system. We also confirmed that the major main crops are sweet potato, soybean, corn, tobacco, spinach from usage frequency analyzed by NetMiner H 2.6 which was used to estimate the rotational cropping system among the green manure crops and main crops.
Jin-Hee Ryu,Doug-Young Chung,Sang-Keon Ha,Sang-Bok Lee,Si-Ju Kim,Min-Tae Kim,Ki-Do Park,Hang-Won Kang 한국토양비료학회 2014 한국토양비료학회지 Vol.47 No.6
Serious problems in reclaimed land agriculture are high soil salinity and poor vertical drainage, so desalinization in these soils is very difficult. Also, although desalinization is accomplished in reclaimed top soils, before long, soils are resalinized according to capillary rise of salts from the subsurface soils. To resolve these problems, multi-layered soil columns with subsurface layer of macroporous medium utilizing coal bottom ash (CBA) were constructed and the effects of blocked resalinization of these soils were investigated. In this experiment soil samples were collected from Munpo series (coarse-loamy, nonacid, mixed, mesic, typic Fluvaquents). The soil texture was silt loam and the EC was 33.9 dS m<SUP>-1</SUP>. As for groundwater seawater was used and groundwater level of 1 cm from the bottom was maintained. The overall rate of capillary rise was 2.38 cm hr<SUP>-1</SUP> in soil 60 cm column, 0.25 cm hr<SUP>-1</SUP> in topsoil (30 cm) + CBA (5 cm) + subsurface soil (10 cm) column and 0.08 cm hr<SUP>-1</SUP> in topsoil (30 cm) + CBA (10 cm) + subsurface soil (10 cm) column. In multi-layered soil columns with CBA 20, 30 cm layer, wetting front due to capillary rise could not be seen in top soil layer. After 70 days capillary rise experiment water soluble Na+ accumulated in top soil of soil columns with CBA 20, 30 cm was diminished by 92.8, 96.5% respectively in comparison with Na+ accumulated in top soil of soil 60 cm column because CBA layer cut off capillary rise of salts from the subsurface soil. From these results we could conclude that the macroporous layer utilizing CBA placed at subsurface layer cut off capillary rise of solutes from subsurface soil, resulting in lowered level of salinity in top soil and this method can be more effective in newly reclaimed saline soil.