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( Sang Il Choi ),( Myeong-cherl Kook ),( Sanghyun Hwang ),( Young-il Kim ),( Jong Yeul Lee ),( Chan Gyoo Kim ),( Il Ju Choi ),( Hyewon Lee ),( Hyeon Seok Eom ),( Soo-jeong Cho ) 대한간학회 2018 Gut and Liver Vol.12 No.3
Background/Aims: Mucosa-associated lymphoid tissue (MALT) lymphoma of the stomach is an uncommon disease. Bone marrow involvement is reported even in patients with only a mucosal lesion. We evaluated the prevalence and risk factors of marrow involvement and its implications for diagnosis and treatment. Methods: In total, 132 patients who were diagnosed with gastric MALT lymphoma at the National Cancer Center in Korea between January 2001 and December 2016 were enrolled in the study. The patient data were collected and analyzed retrospectively. Results: Of the 132 patients, 47 (35.6%) were male, with a median age of 52 years (range, 17 to 81 years). The median follow-up duration was 48.8 months (range, 0.5 to 169.9 months). Helicobacter pylori infection was detected in 82 patients (62.1%). Most patients (80.3%) had stage IE1 according to the modified Ann Arbor staging system. Ninety-two patients underwent bone marrow evaluation, and four patients (4.3%) had marrow involvement. Of these patients, one presented with abdominal lymph node involvement, while the other three had stage IE1 disease if marrow involvement was disregarded. All three patients had no significant symptoms and were monitored after local treatment without evidence of disease aggravation. Conclusions: Bone marrow involvement was found in 4.3% of the patients with gastric MALT lymphoma. Bone marrow examination may be deferred because marrow involvement does not change the treatment options or outcome in gastric MALT lymphoma confined to the stomach wall. (Gut Liver 2018;12:278-287)
( Sang Ho Lee ),( Hye Young Koo ),( Jung Hyun Kim ),( You Na Ko ),( Jang Heui Yi ),( Yun Chan Kang ),( Hye Moon Lee ),( Jung Yeul Yun ) 대한금속재료학회 ( 구 대한금속학회 ) 2010 재료마당 Vol.23 No.3
Fine size BaMgAl10O17:Eu phosphor powders were prepared by spray pyrolysis from a spray solution with ethylenediaminetetraacetic acid, citric acid, and NH4F flux. The precursor powder prepared by spray pyrolysis has a hollow, thin-walled structure and was transformed into BaMgAl10O17:Eu phosphor powders with fine size and a plate-like morphology. The phosphor powders had pure hexagonal BAM phases even at a low temperature of 1100°C. The mean sizes of the phosphor powders prepared from a spray solution with 6wt. % NH4F of the phosphor were 1.1 μm, 2.4 μm, and 1.9 μm at post-treatment temperatures of 1100°C, 1150°C, and 1300°C. The maximum photoluminescence intensity of the phosphor powders post-treated at 1150°C was 93% of that of commercial BAM:Eu phosphor powders.
Kim, Hyun Kyung,Jung, Hae-Yun,Lim, Seungjoon,Sung, Jae Sook,Whang, Young Mi,Jo, Ukhyun,Lee, Jong Eun,Shin, Sang Won,Kim, Jun Suk,Ryu, Jeong Seon,Kim, Yeul Hong Potamitis Press 2010 Anticancer research Vol.30 No.9
<P>Background/Aim: This study examined whether the polymorphisms at the promoter region of RET gene are associated with the risk of lung cancer in the Korean population. PATIENTS AND METHODS: A total of 409 Korean lung cancer patients and 409 normal subjects were recruited. PCR-RFLP, SNaP Shot assay and logistic regression analyses were performed to characterize the association between polymorphisms of RET and lung cancer risk. RESULTS: Four SNPs (-1697 C>G, -1260 C>T, -719 C>T, -527 C>A) of RET were selected for large-scale genotyping. Statistical analyses revealed that novel -1260 C > T polymorphism and haplotype 3 (-1697G, -1260T, -719C, and -719C) were associated with the risk of lung cancer; specifically, there were significant associations within subgroups of males and smokers. CONCLUSION: These results demonstrated that this novel polymorphism of the RET gene is associated with an increased risk of lung cancer in the Korean population.</P>
Redox regulation of the tumor suppressor PTEN by glutathione
Kim, Yujeong,Song, Yong Bhum,Kim, Tae-Youl,Kim, Inyoung,Han, Seong-Jeong,Ahn, Younghee,Cho, Seung-Hyun,Choi, Cheol Yong,Chay, Kee-Oh,Yang, Sung Yeul,Ahn, Bong Whan,Huh, Won-Ki,Lee, Seung-Rock Elsevier 2010 FEBS letters Vol.584 No.16
<P><B>Abstract</B></P><P>Phosphatase and tensin homolog deleted on chromosome 10 (PTEN) expressed in <I>Saccharomyces cerevisiae</I> was reversibly oxidized by hydrogen peroxide and reduced by cellular reductants. Reduction of hPTEN was delayed in each of <I>S. cerevisiae</I> gsh1Δ and gsh2Δ mutants. Expression of γ-glutamylcysteine synthetase Gsh1 in the gsh1Δ mutant rescued regeneration rate of hPTEN. Oxidized hPTEN was reduced by glutathione in a concentration- and time-dependent manner. Glutathionylated PTEN was detected. Incubation of 293T cells with BSO and knockdown expression of GCLc in HeLa cells by siRNA resulted in the delay of reduction of oxidized PTEN. Also, in HeLa cells transfected with GCLc siRNA, stimulation with epidermal growth factor resulted in the increase of oxidized PTEN and phosphorylation of Akt. These results suggest that the reduction of oxidized hPTEN is mediated by glutathione.</P>
Kim, Sun-Uk,Hwang, Chang Nam,Sun, Hu-Nan,Jin, Mei-Hua,Han, Ying-Hao,Lee, Hwang,Kim, Jin-Man,Kim, Sang-Keun,Yu, Dae-Yeul,Lee, Dong-Seok,Lee, Sang Ho Pharmaceutical Society of Japan 2008 Biological & pharmaceutical bulletin Vol.31 No.5
<P>Imbalance between oxidative stress and antioxidative defence system is generally known as one of mechanisms causing an oxidative stress-medieated neuropathogenesis. Peroxiredoxins (Prxs), a family of antioxidative enzymes neutralizing cellular hydroperoxides, was characterized recently, but their distributions and roles have not been resolved clearly or controversial in the central nervous system, Therefore, the present study was carried out to determine the specific cell types that express Prx I in the mouse brain and primary neural cells, and to examine its antioxidative role in the preferential cell types. Immunohistochemical reactivity for Prx I was detected dominantly in oligodendrocytes and rarely in microglia, whereas strong and specific immunoreactivity for Prx I was observed exclusively in microglia of primary neural cell culture. Further evidences for Prx I specificity were its relatively high expression in BV-2 microglial cells and its upregulated expression in microglia after lipopolysaccharide (LPS) stimulation. These results imply that Prx I can be used as an indicator of microglial activation. Inhibition of p38 MAPK ablated LPS-mediated Prx I upregulation and sensitized the microglia to H<SUB>2</SUB>O<SUB>2</SUB>-mediated cell death. These findings indicate that Prx I function as a scavenger for H<SUB>2</SUB>O<SUB>2</SUB> generated during microglial activation. The results of this study will help in unraveling the neuropathologic roles of the six Prx isoforms in neural function.</P>