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Cho, Eunae,Choi, Jae Min,Kim, Hwanhee,Tahir, Muhammad Nazir,Choi, Youngjin,Jung, Seunho Rapid Communications of Oxford ; Kluwer Academic P 2013 Biometals Vol.26 No.2
<P>Iron is an essential nutrient for nitrogen-fixing legume root nodules, and the chelation of ferrous iron plays an important role in the mobility and availability of iron to the legume. In the present study, we investigated the iron-binding properties of low-molecular weight succinoglycans isolated from the nitrogen-fixing bacterium, Sinorhizobium meliloti. The low-molecular weight succinoglycans comprising three monomers (M1-M3), four dimers (D1-D4), and six trimers (T1-T6) of the succinoglycan repeating unit were purified by various chromatographic techniques. Interestingly, the colorimetric ferrozine method showed that the succinoglycans T6, M3, and D3 demonstrated a ferrous iron chelating ability of 83, 63, and 38 % per mg, respectively. The individual binding constants were determined as 43703, 2313, and 760 M(-1) for succinoglycans T6, M3, and D3 using ultraviolet-visible spectroscopy. The complexation of succinoglycan and ferrous iron can cause structural changes, which were analyzed by circular dichroism spectroscopy. Furthermore, the complex could provide antioxidant activity through an anti-Fenton reaction. These results demonstrate that the low-molecular weight succinoglycans can effectively modulate iron biochemistry as a novel ferrous iron-acquisition system of S. meliloti.</P>
Association of colorectal adenoma with components of metabolic syndrome.
Kim, Byung Chang,Shin, Aesun,Hong, Chang Won,Sohn, Dae Kyung,Han, Kyung Su,Ryu, Kum Hei,Park, Bum Joon,Nam, Ji Hyung,Park, Ji Won,Chang, Hee Jin,Choi, Hyo Seong,Kim, Jeongseon,Oh, Jae Hwan Rapid Communications of Oxford Ltd ; Kluwer Academ 2012 Cancer causes & control Vol.23 No.5
<P>Recently, some studies have shown that diabetes mellitus and metabolic syndrome increase the risk of colorectal neoplasms. Although the mechanism is not known, those have been proposed to contribute to this phenomenon, including insulin resistance, oxidative stress, and adipokine production. The objective of this study was to assess the association between metabolic risk factors and colorectal neoplasm.</P>
Ecological study for refrigerator use, salt, vegetable, and fruit intakes, and gastric cancer.
Park, Boyoung,Shin, Aesun,Park, Sue K,Ko, Kwang-Pil,Ma, Seung Hyun,Lee, Eun-Ha,Gwack, Jin,Jung, En-Joo,Cho, Lisa Y,Yang, Jae Jeong,Yoo, Keun-Young Rapid Communications of Oxford Ltd ; Kluwer Academ 2011 Cancer causes & control Vol.22 No.11
<P>We used an ecological approach to determine the correlation between vegetable, fruit and salt intakes, refrigerator use, and gastric cancer mortality in Korean population. Information on fruit and vegetable intakes per capita from the National Health and Nutrition Survey, death certificate data from the National Statistical office, refrigerator per household data from Korean Statistical Information Service, and salt/sodium intake data from a cross-sectional survey were utilized. Correlation coefficients were calculated between vegetable and fruit intakes, refrigerator per household, and gastric cancer mortality and between salt and sodium intakes, and gastric cancer mortality and incidence in the four areas. With 5, 10, and 15?years lag time, refrigerator usage and fruit intake were negatively associated with gastric cancer mortality (p?<?0.01), but vegetable intake was not associated with gastric cancer mortality. When estimates of salt/sodium intake evaluated by 24-h urine collection in four areas of Korea were compared to the gastric cancer mortality and incidence in these regions, positive correlation was shown between salt/sodium intake, and gastric cancer incidence and mortality. Negative associations between refrigerator use, fruit intake, and gastric cancer mortality and positive associations between salt/sodium intake and gastric cancer mortality and incidence were suggested.</P>