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Lee HW, Choi JH, Seo D, Gavaachimed L, Choi J, Park S, Min NY, Lee DH, Bang HW, Ham SW, Kim JW, Lee SC, Rhee S, Seo SB, Lee KH. EGCG-induced selective death of cancer cells through autophagy-dependent regulation of the p62-mediated antioxidant survival pathway. Biochim Biophys Acta Mol Cell Res 2024; 1871:119659. [PMID: 38216089 DOI: 10.1016/j.bbamcr.2024.119659] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/19/2023] [Revised: 11/22/2023] [Accepted: 12/29/2023] [Indexed: 01/14/2024]
Abstract
The effects of EGCG on the selective death of cancer cells by modulating antioxidant pathways through autophagy were explored in various normal and cancer cells. EGCG positively regulated the p62-KEAP1-NRF2-HO-1 pathway in normal cells, while negatively regulating it in cancer cells, leading to selective apoptotic death of cancer cells. In EGCG-treated MRC5 cells (EGCG-MRC5), autophagic flux was blocked, which was accompanied by the formation of p62-positive aggregates. However, EGCG-treated HeLa cells (EGCG-HeLa) showed incomplete autophagic flux and no aggregate formation. The levels of P-ULK1 S556 and S758 increased in EGCG-MRC5 through AMPK-mTOR cooperative interaction. In contrast, EGCG treatment in HeLa cells led to AMPK-induced mTOR inactivation, resulting in abrogation of P-ULK1 S556 and S758 levels. AMPK knockout in EGCG-HeLa restored positive regulation of the p62-mediated pathway, which was accompanied by increased P-mTOR S2448 and P-ULK1 S758 levels. Knockdown of 67LR in EGCG-HeLa abolished AMPK activity but did not restore the p62-mediated pathway. Surprisingly, both AMPK knockout and 67LR knockdown in EGCG-HeLa markedly increased cell viability, despite differential regulation of the antioxidant enzyme HO-1. In conclusion, EGCG induces the selective death of cancer cells through the modulation of at least two autophagy-dependent and independent regulatory pathways: negative regulation involves the mTOR-ULK1 (S556 and S758)-p62-KEAP1-NRF2-HO-1 axis via AMPK activation, whereas positive regulation occurs through the 67LR-AMPK axis.
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Affiliation(s)
- Ho Woon Lee
- Department of Life Science, College of Natural Sciences, Chung-Ang University, Seoul, Republic of Korea
| | - Jee-Hye Choi
- Department of Life Science, College of Natural Sciences, Chung-Ang University, Seoul, Republic of Korea
| | - Dongbeom Seo
- Department of Life Science, College of Natural Sciences, Chung-Ang University, Seoul, Republic of Korea
| | - Lkhagvasuren Gavaachimed
- Department of Science of Cultural Properties, Graduate School, Chung-Ang University, Seoul, Republic of Korea
| | - Jaesung Choi
- Department of Life Science, College of Natural Sciences, Chung-Ang University, Seoul, Republic of Korea
| | - Sehwan Park
- Department of Life Science, College of Natural Sciences, Chung-Ang University, Seoul, Republic of Korea
| | - Na Young Min
- Department of Life Science, College of Natural Sciences, Chung-Ang University, Seoul, Republic of Korea
| | - Dong Ho Lee
- Da Vinci College of General Education, Chung-Ang University, Seoul, Republic of Korea
| | - Hyo-Weon Bang
- Department of Physiology, College of Medicine, Chung-Ang University, Seoul, Republic of Korea
| | - Seung Wook Ham
- Department of Chemistry, College of Natural Sciences, Chung-Ang University, Seoul, Republic of Korea
| | - Jung-Woong Kim
- Department of Life Science, College of Natural Sciences, Chung-Ang University, Seoul, Republic of Korea
| | - Sung Chul Lee
- Department of Life Science, College of Natural Sciences, Chung-Ang University, Seoul, Republic of Korea
| | - Sangmyung Rhee
- Department of Life Science, College of Natural Sciences, Chung-Ang University, Seoul, Republic of Korea
| | - Sang-Beom Seo
- Department of Life Science, College of Natural Sciences, Chung-Ang University, Seoul, Republic of Korea
| | - Kwang-Ho Lee
- Department of Life Science, College of Natural Sciences, Chung-Ang University, Seoul, Republic of Korea; Department of Science of Cultural Properties, Graduate School, Chung-Ang University, Seoul, Republic of Korea.
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Schaffer J, Fogelman N, Seo D, Sinha R. Chronic pain, chronic stress and substance use: overlapping mechanisms and implications. Front Pain Res (Lausanne) 2023; 4:1145934. [PMID: 37415830 PMCID: PMC10320206 DOI: 10.3389/fpain.2023.1145934] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2023] [Accepted: 06/05/2023] [Indexed: 07/08/2023] Open
Abstract
Chronic pain is among the most common reasons adults in the U.S. seek medical care. Despite chronic pain's substantial impact on individuals' physical, emotional, and financial wellness, the biologic underpinnings of chronic pain remain incompletely understood. Such deleterious impact on an individuals' wellness is also manifested in the substantial co-occurrence of chronic stress with chronic pain. However, whether chronic stress and adversity and related alcohol and substance misuse increases risk of developing chronic pain, and, if so, what the overlapping psychobiological processes are, is not well understood. Individuals suffering with chronic pain find alleviation through prescription opioids as well as non-prescribed cannabis, alcohol, and other drugs to control pain, and use of these substances have grown significantly. Substance misuse also increases experience of chronic stress. Thus, given the evidence showing a strong correlation between chronic stress and chronic pain, we aim to review and identify overlapping factors and processes. We first explore the predisposing factors and psychologic features common to both conditions. This is followed by examining the overlapping neural circuitry of pain and stress in order to trace a common pathophysiologic processes for the development of chronic pain and its link to substance use. Based on the previous literature and our own findings, we propose a critical role for ventromedial prefrontal cortex dysfunction, an overlapping brain area associated with the regulation of both pain and stress that is also affected by substance use, as key in the risk of developing chronic pain. Finally, we identify the need for future research in exploring the role of medial prefrontal circuits in chronic pain pathology. Critically, in order to alleviate the enormous burden of chronic pain without exacerbating the co-occurring substance misuse crisis, we emphasize the need to find better approaches to treat and prevent chronic pain.
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Affiliation(s)
| | | | | | - R. Sinha
- Department of Psychiatry and the Yale Stress Center, Yale University School of Medicine, New Haven, CT, United States
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Choi J, Choi JH, Lee HW, Seo D, Lkhagvasuren G, Kim JW, Seo SB, Lee K, Lee KH. KPNA3 promotes epithelial-mesenchymal transition by regulating TGF-β and AKT signaling pathways in MDA-MB-231, a triple-negative breast cancer cell line. BMB Rep 2023; 56:120-125. [PMID: 36593106 PMCID: PMC9978358] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2022] [Indexed: 01/04/2023] Open
Abstract
Karyopherin-α3 (KPNA3), a karyopherin- α isoform, is intimately associated with metastatic progression via epithelial-mesenchymal transition (EMT). However, the molecular mechanism underlying how KPNA3 acts as an EMT inducer remains to be elucidated. In this report, we identified that KPNA3 was significantly upregulated in cancer cells, particularly in triple-negative breast cancer, and its knockdown resulted in the suppression of cell proliferation and metastasis. The comprehensive transcriptome analysis from KPNA3 knockdown cells indicated that KPNA3 is involved in the regulation of numerous EMTrelated genes, including the downregulation of GATA3 and E-cadherin and the up-regulation of HAS2. Moreover, it was found that KPNA3 EMT-mediated metastasis can be achieved by TGF-β or AKT signaling pathways; this suggests that the novel independent signaling pathways KPNA3-TGF-β-GATA3-HAS2/E-cadherin and KPNA3-AKT-HAS2/E-cadherin are involved in the EMT-mediated progress of TNBC MDA-MB-231 cells. These findings provide new insights into the divergent EMT inducibility of KPNA3 according to cell and cancer type. [BMB Reports 2023; 56(2): 120-125].
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Affiliation(s)
- Jaesung Choi
- Department of Life Science, College of Natural Sciences, Chung-Ang University, Seoul 06974, Korea, Seoul 06974, Korea
| | - Jee-Hye Choi
- Department of Life Science, College of Natural Sciences, Chung-Ang University, Seoul 06974, Korea, Seoul 06974, Korea
| | - Ho Woon Lee
- Department of Life Science, College of Natural Sciences, Chung-Ang University, Seoul 06974, Korea, Seoul 06974, Korea
| | - Dongbeom Seo
- Department of Life Science, College of Natural Sciences, Chung-Ang University, Seoul 06974, Korea, Seoul 06974, Korea
| | - Gavaachimed Lkhagvasuren
- Department of Science of Cultural Heritage, Graduate School, Chung-Ang University, Seoul 06974, Korea
| | - Jung-Woong Kim
- Department of Life Science, College of Natural Sciences, Chung-Ang University, Seoul 06974, Korea, Seoul 06974, Korea
| | - Sang-Beom Seo
- Department of Life Science, College of Natural Sciences, Chung-Ang University, Seoul 06974, Korea, Seoul 06974, Korea
| | - Kangseok Lee
- Department of Life Science, College of Natural Sciences, Chung-Ang University, Seoul 06974, Korea, Seoul 06974, Korea
| | - Kwang-Ho Lee
- Department of Life Science, College of Natural Sciences, Chung-Ang University, Seoul 06974, Korea, Seoul 06974, Korea,Department of Science of Cultural Heritage, Graduate School, Chung-Ang University, Seoul 06974, Korea,Corresponding author. Tel: +82-2-820-5213; Fax: +82-2-825-5206; E-mail:
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Choi J, Choi JH, Lee HW, Seo D, Lkhagvasuren G, Kim JW, Seo SB, Lee K, Lee KH. KPNA3 promotes epithelial–mesenchymal transition by regulating TGF-β and AKT signaling pathways in MDA-MB-231, a triple-negative breast cancer cell line. BMB Rep 2022. [DOI: 10.5483/bmbrep.2022-0180] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023] Open
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5
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Sinha R, Fogelman N, Wemm S, Angarita G, Seo D, Hermes G. Alcohol withdrawal symptoms predict corticostriatal dysfunction that is reversed by prazosin treatment in alcohol use disorder. Addict Biol 2022; 27:e13116. [PMID: 34856641 PMCID: PMC9872962 DOI: 10.1111/adb.13116] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2021] [Revised: 10/31/2021] [Accepted: 11/03/2021] [Indexed: 01/27/2023]
Abstract
Chronic alcohol use increases risk of alcohol withdrawal symptoms (AW) and disrupts stress biology and resilient coping, thereby promoting excessive alcohol intake. Chronic alcohol intake and multiple alcohol detoxifications are known to impair brain medial prefrontal cortex (mPFC) and striatal functioning, regions involved in regulating stress, craving and alcohol intake. In two related studies, we examined whether AW predicts this functional brain pathology and whether Prazosin versus Placebo treatment may reverse these effects. In Study 1, patients with Alcohol Use Disorder (AUD) (N = 45) with varying AW levels at treatment entry were assessed to examine AW effects on corticostriatal responses to stress, alcohol cue and neutral visual images with functional magnetic resonance imaging (fMRI). In Study 2, 23 AUD patients entering a 12-week randomised controlled trial (RCT) of Prazosin, an alpha1 adrenergic antagonist that decreased withdrawal-related alcohol intake in laboratory animals, participated in two fMRI sessions at pretreatment and also at week 9-10 of chronic treatment (Placebo: N = 13; Prazosin: N = 10) to assess Prazosin treatment effects on alcohol-related cortico-striatal dysfunction. Study 1 results indicated that higher AW predicted greater disruption in brain mPFC and striatal response to stress and alcohol cues (p < 0.001, family-wise error [FWE] correction) and also subsequently greater heavy drinking days (HDD) in early treatment (p < 0.01). In Study 2, Prazosin versus Placebo treatment reversed mPFC-striatal dysfunction (p < 0.001, FWE), which in turn predicted fewer drinking days (p < 0.01) during the 12-week treatment period. These results indicate that AW is a significant predictor of alcohol-related prefrontal-striatal dysfunction, and Prazosin treatment reversed these effects that in turn contributed to improved alcohol treatment outcomes.
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Affiliation(s)
- R Sinha
- Yale Stress Center, Yale University School of Medicine,Department of Psychiatry, Yale University School of Medicine, New Haven CT,Department of Neuroscience, Yale University School of Medicine, New Haven CT
| | - N Fogelman
- Yale Stress Center, Yale University School of Medicine,Department of Psychiatry, Yale University School of Medicine, New Haven CT
| | - S Wemm
- Yale Stress Center, Yale University School of Medicine,Department of Psychiatry, Yale University School of Medicine, New Haven CT
| | - G Angarita
- Department of Psychiatry, Yale University School of Medicine, New Haven CT
| | - D Seo
- Yale Stress Center, Yale University School of Medicine,Department of Psychiatry, Yale University School of Medicine, New Haven CT
| | - G Hermes
- Yale Stress Center, Yale University School of Medicine,Department of Psychiatry, Yale University School of Medicine, New Haven CT
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Manjula P, Fulton JE, Seo D, Lee JH. Comparison of major histocompatibility complex-B variability in Sri Lankan indigenous chickens with five global chicken populations using MHC-B SNP panel. Anim Genet 2021; 52:824-833. [PMID: 34523150 DOI: 10.1111/age.13137] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/26/2021] [Indexed: 11/29/2022]
Abstract
In the present study, we investigated the major histocompatibility complex (MHC)-B haplotypes diversity of Sri Lankan indigenous chickens from three different geographical sites consisting of highly mixed populations using 90 SNPs in the MHC-B region. A total of 48 haplotypes were identified. Those included 37 novel haplotypes and 11 previously identified 'standard' haplotypes. The MHC-linked marker, LEI0258, had 23 alleles showing less diversity than defined by MHC-B SNP haplotypes. Among those identified haplotypes, five standard haplotypes-BSNP-O02, BSNP-M01, BSNP-A04, BSNP-K03, BSNP-T04-were most commonly observed, suggesting past introgression of imported breeds. Comparison of the MHC-B haplotypes of Sri Lankan and four other global populations with previously defined haplotypes indicated the sharing of 23 standard haplotypes with common origins. Novel haplotypes are population-specific and not shared among the geographical boundaries. Backyard indigenous chickens are unselected, highly crossbred, and generally thrive under dynamic environmental conditions. Hence free-range production systems may be responsible for maintaining high diversity in the MHC-B region with novel haplotypes.
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Affiliation(s)
- P Manjula
- Division of Animal and Dairy Sciences, Chungnam National University, Daejeon, 34134, Korea
| | - J E Fulton
- Hy-Line International, Dallas Center, IA, 50063, USA
| | - D Seo
- Division of Animal and Dairy Sciences, Chungnam National University, Daejeon, 34134, Korea
| | - J H Lee
- Division of Animal and Dairy Sciences, Chungnam National University, Daejeon, 34134, Korea
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7
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Jo J, Seo D. Carcinogenicity assessment of cyclohexanone through inhalation exposure. Toxicol Lett 2021. [DOI: 10.1016/s0378-4274(21)00598-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Hu Y, Seo D, Shih P, Lin H. SOCIAL RELATIONSHIPS, NEIGHBORHOOD DISORDER, AND COGNITIVE DECLINE IN ELDERLY: DIFFERENCES BY LIVING ARRANGEMENT. Innov Aging 2018. [DOI: 10.1093/geroni/igy031.3692] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
- Y Hu
- Indiana University Bloomington
| | - D Seo
- Indiana University Bloomington
| | - P Shih
- Indiana University Bloomington
| | - H Lin
- Indiana University Bloomington
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Kim J, Ryoo S, Sohn C, Seo D, Lim K, Kim W. 144 Risk Factors for Same Pathogen Sepsis Readmissions Following Hospitalization for Septic Shock. Ann Emerg Med 2018. [DOI: 10.1016/j.annemergmed.2018.08.149] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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10
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Kim S, Park J, Kim K, Jeon W, Sung M, Seo D. 356 Pharmaceutical Drug Poisoning After Deregulation of Over-the-Counter Drugs Sales: Emergency Department Based Injury In-Depth Injury Surveillance. Ann Emerg Med 2018. [DOI: 10.1016/j.annemergmed.2018.08.361] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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11
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Atallah TL, Wang J, Bosch M, Seo D, Burke RA, Moneer O, Zhu J, Theibault M, Brus LE, Hone J, Zhu XY. Electrostatic Screening of Charged Defects in Monolayer MoS 2. J Phys Chem Lett 2017; 8:2148-2152. [PMID: 28448150 DOI: 10.1021/acs.jpclett.7b00710] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Defects in monolayer transition-metal dichalcogenides (TMDCs) may lead to unintentional doping, charge-carrier trapping, and nonradiative recombination. These effects impair electronic and optoelectronic technologies. Here we show that charged defects in MoS2 monolayers can be effectively screened when they are in contact with an ionic liquid (IL), leading to an increase in photoluminescence (PL) yield by up to two orders of magnitude. The extent of this PL enhancement by the IL correlates with the brightness of each pretreated sample. We propose the existence of two classes of nonradiative recombination centers in monolayer MoS2: (i) charged defects that relate to unintentional doping and may be electrostatically screened by ILs and (ii) neutral defects that remain unaffected by the presence of ILs.
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Affiliation(s)
- T L Atallah
- Department of Chemistry, Columbia University , New York, New York 10027, United States
| | - J Wang
- Department of Chemistry, Columbia University , New York, New York 10027, United States
| | - M Bosch
- Department of Chemistry, Columbia University , New York, New York 10027, United States
| | - D Seo
- Department of Mechanical Engineering, Columbia University , New York, New York 10027, United States
| | - R A Burke
- Sensors and Electron Devices Directorate, US Army Research Laboratory , Adelphi, Maryland 20783, United States
| | - O Moneer
- Department of Chemistry, Columbia University , New York, New York 10027, United States
| | - Justin Zhu
- Department of Chemistry, Columbia University , New York, New York 10027, United States
| | - M Theibault
- Department of Chemistry, Columbia University , New York, New York 10027, United States
| | - L E Brus
- Department of Chemistry, Columbia University , New York, New York 10027, United States
| | - J Hone
- Department of Mechanical Engineering, Columbia University , New York, New York 10027, United States
| | - X-Y Zhu
- Department of Chemistry, Columbia University , New York, New York 10027, United States
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Blaine S, Seo D, Sinha R. Binge-heavy alcohol alters cortisol and subjective craving: Impact on compulsive alcohol motivation and intake. Alcohol 2017. [DOI: 10.1016/j.alcohol.2017.02.224] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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13
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Jeong TD, Mun YC, Chung HS, Seo D, Im J, Huh J. Novel deletion mutation of HLA-B*40:02 gene in acquired aplastic anemia. HLA 2016; 89:47-51. [PMID: 28025876 DOI: 10.1111/tan.12943] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2016] [Revised: 10/31/2016] [Accepted: 11/17/2016] [Indexed: 01/03/2023]
Abstract
Despite prevalence of clonal evolution in patients with aplastic anemia (AA), somatic mutation of human leukocyte antigen (HLA) gene is rarely reported. Herein, we reported a case of acquired AA (aAA) harboring a new four-base-pair deletion mutation within exon 4 of HLA-B*40:02 leading to frameshift and premature stop codon. The HLA-B*40:02 mutant allele was detected in the patient's peripheral blood sample not in patient's buccal epithelial cells. The patient received allogenic hematopoietic stem cell transplantation (HSCT) from HLA-matched sibling donor. On day 30 after HSCT, the mutant HLA allele was not detected by high-resolution sequence-based HLA typing. Serial chimerism analyses showed mixed chimeric status indicative of coexisting donor and recipient hematopoietic cells. Our data could provide additional support in view of pathophysiology of aAA that somatic mutation of HLA-B*40:02 allele is one of the possible origin of clonal escape to evade immune attack in patient with aAA.
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Affiliation(s)
- T-D Jeong
- Department of Laboratory Medicine, Ewha Womans University School of Medicine, Seoul, Korea
| | - Y-C Mun
- Division of Hematology & Oncology, Department of Internal Medicine, Ewha Womans University School of Medicine, Seoul, Korea
| | - H-S Chung
- Department of Laboratory Medicine, Ewha Womans University School of Medicine, Seoul, Korea
| | - D Seo
- Department of Laboratory Medicine, Ewha Womans University School of Medicine, Seoul, Korea
| | - J Im
- Research and Development Team, Biowithus Life Science Institute, Seoul, Korea
| | - J Huh
- Department of Laboratory Medicine, Ewha Womans University School of Medicine, Seoul, Korea
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Seo D, Sudrajad P, Lee D, Choi NR, Jin S, Lee SH, Lee JH. P4036 Estimation of linkage disequilibrium and effective population size in Korean native chicken. J Anim Sci 2016. [DOI: 10.2527/jas2016.94supplement496x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Jin S, Park HB, Seo D, Choi NR, Yoo CK, Jung S, Jo C, Manjula P, Lee SH, Lee JH. P5019 Identification of QTLs for the fatty acid composition in chicken. J Anim Sci 2016. [DOI: 10.2527/jas2016.94supplement4124a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Choi NR, Seo D, Jin S, Manjula P, Lee SH, Lee JH. P4026 Discrimination of native chicken breeds using SNP markers selected from the 600K chip data. J Anim Sci 2016. [DOI: 10.2527/jas2016.94supplement491a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Belfort-DeAguiar R, Seo D, Naik S, Hwang J, Lacadie C, Schmidt C, Constable RT, Sinha R, Sherwin R. Food image-induced brain activation is not diminished by insulin infusion. Int J Obes (Lond) 2016; 40:1679-1686. [PMID: 27569684 PMCID: PMC5101182 DOI: 10.1038/ijo.2016.152] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/11/2016] [Revised: 07/26/2016] [Accepted: 08/07/2016] [Indexed: 12/19/2022]
Abstract
Background/Objective The obesity epidemic appears to be driven in large part by our modern environment inundated by food cues, which may influence our desire to eat. While insulin decreases food intake in both animals and humans, the effect of insulin on motivation for food in the presence of food cues is not known. Therefore, the aim of this study was to evaluate the effect of an intravenous insulin infusion on the brain response to visual food cues, hunger and food craving in non-obese human subjects. Subjects/Methods Thirty-four right-handed healthy non-obese subjects (19F/15M, age: 29±8 yrs.; BMI: 23.1±2.1 kg/m2) were divided in two groups matched by age, and BMI: the Insulin Group (18 subjects) underwent a hyperinsulinemic-euglycemic-clamp, and the control group (16 subjects) received an intravenous saline infusion, while viewing high and low-calorie food and non-food pictures during a functional MRI scan. Motivation for food was determined via analogue scales for hunger, wanting and liking ratings. Results Food images induced brain responses in the hypothalamus, striatum, amygdala, insula, ventromedial prefrontal cortex (PFC), dorsolateral PFC, and occipital lobe (whole brain correction, P<0.05). Wanting (P<0.001) and liking (P<0.001) ratings were significantly higher for the food than the non-food images, but not different between insulin and saline infusion groups. Hunger ratings increased throughout the MRI scan and correlated with preference for high-calorie food pictures (r=0.70; P<0.001). However neither brain activity nor food craving were affected by hyperinsulinemia or hormonal status (leptin and ghrelin levels) (P=NS). Conclusion Our data demonstrate that visual food cues induce a strong response in motivation/reward and cognitive-executive control brain regions in non-obese subjects, but that these responses are not diminished by hyperinsulinemia per se. These findings suggest that our modern food cue saturated environment may be sufficient to overpower homeostatic hormonal signals, and thus contribute to the current obesity epidemic.
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Affiliation(s)
- R Belfort-DeAguiar
- Department of Internal Medicine, Section of Endocrinology, Yale University School of Medicine, New Haven, CT, USA
| | - D Seo
- Department of Psychiatry, Yale University School of Medicine, New Haven, CT, USA
| | - S Naik
- Department of Internal Medicine, Section of Endocrinology, Yale University School of Medicine, New Haven, CT, USA.,University College London Hospitals NHS, London, UK
| | - J Hwang
- Department of Internal Medicine, Section of Endocrinology, Yale University School of Medicine, New Haven, CT, USA
| | - C Lacadie
- Department of Radiology, Yale University School of Medicine, New Haven, CT, USA
| | - C Schmidt
- Department of Internal Medicine, Section of Endocrinology, Yale University School of Medicine, New Haven, CT, USA
| | - R T Constable
- Department of Radiology, Yale University School of Medicine, New Haven, CT, USA
| | - R Sinha
- Department of Psychiatry, Yale University School of Medicine, New Haven, CT, USA
| | - R Sherwin
- Department of Internal Medicine, Section of Endocrinology, Yale University School of Medicine, New Haven, CT, USA
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Beecham AH, Wang L, Vasudeva N, Liu Z, Dong C, Goldschmidt-Clermont PJ, Pericak-Vance MA, Rundek T, Seo D, Blanton SH, Sacco RL, Beecham GW. Utility of blood pressure genetic risk score in admixed Hispanic samples. J Hum Hypertens 2016; 30:772-777. [PMID: 27251080 PMCID: PMC6456256 DOI: 10.1038/jhh.2016.29] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2015] [Revised: 03/09/2016] [Accepted: 03/29/2016] [Indexed: 12/31/2022]
Abstract
Hypertension is strongly influenced by genetic factors. Although
hypertension prevalence in some Hispanic sub-populations is greater than in
non-Hispanic whites, genetic studies on hypertension have focused primarily on
samples of European descent. A recent meta-analysis of 200,000 individuals of
European descent identified 29 common genetic variants that influence blood
pressure, and a genetic risk score derived from the 29 variants has been
proposed. We sought to evaluate the utility of this genetic risk score in
Hispanics. The sample set consists of 1994 Hispanics from two cohorts: the
Northern Manhattan Study (primarily Dominican/Puerto Rican) and the Miami
Cardiovascular Registry (primarily Cuban/South American). Risk scores for
systolic and diastolic blood pressure were computed as a weighted sum of the
risk alleles, with the regression coefficients reported in the European
meta-analysis used as weights. Association of risk score with blood pressure was
tested within each cohort, adjusting for age, age squared, sex, and BMI. Results
were combined using an inverse-variance meta-analysis. The risk score was
significantly associated with blood pressure in our combined sample (p = 5.65
× 10−4 for systolic and p = 1.65 ×
10−3 for diastolic) but the magnitude of the regression
coefficients varied by degree of European, African, and Native American
admixture. Further studies among other Hispanic sub-populations are needed to
elucidate the role of these 29 variants and identify additional genetic and
environmental factors contributing to blood pressure variability in
Hispanics.
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Affiliation(s)
- A H Beecham
- John P Hussman Institute for Human Genomics, University of Miami, Miller School of Medicine, Miami, FL, USA.,Dr John T Macdonald Foundation, Department of Human Genetics and Genomics, University of Miami, Miller School of Medicine, Miami, FL, USA
| | - L Wang
- John P Hussman Institute for Human Genomics, University of Miami, Miller School of Medicine, Miami, FL, USA.,Dr John T Macdonald Foundation, Department of Human Genetics and Genomics, University of Miami, Miller School of Medicine, Miami, FL, USA
| | - N Vasudeva
- John P Hussman Institute for Human Genomics, University of Miami, Miller School of Medicine, Miami, FL, USA.,Dr John T Macdonald Foundation, Department of Human Genetics and Genomics, University of Miami, Miller School of Medicine, Miami, FL, USA
| | - Z Liu
- John P Hussman Institute for Human Genomics, University of Miami, Miller School of Medicine, Miami, FL, USA.,Dr John T Macdonald Foundation, Department of Human Genetics and Genomics, University of Miami, Miller School of Medicine, Miami, FL, USA
| | - C Dong
- Department of Neurology, University of Miami, Miller School of Medicine, Miami, FL, USA
| | - P J Goldschmidt-Clermont
- Division of Cardiology, Department of Medicine, University of Miami, Miller School of Medicine, Miami, FL, USA
| | - M A Pericak-Vance
- John P Hussman Institute for Human Genomics, University of Miami, Miller School of Medicine, Miami, FL, USA.,Dr John T Macdonald Foundation, Department of Human Genetics and Genomics, University of Miami, Miller School of Medicine, Miami, FL, USA
| | - T Rundek
- Department of Neurology, University of Miami, Miller School of Medicine, Miami, FL, USA
| | - D Seo
- Division of Cardiology, Department of Medicine, University of Miami, Miller School of Medicine, Miami, FL, USA
| | - S H Blanton
- John P Hussman Institute for Human Genomics, University of Miami, Miller School of Medicine, Miami, FL, USA.,Dr John T Macdonald Foundation, Department of Human Genetics and Genomics, University of Miami, Miller School of Medicine, Miami, FL, USA
| | - R L Sacco
- Department of Neurology, University of Miami, Miller School of Medicine, Miami, FL, USA
| | - G W Beecham
- John P Hussman Institute for Human Genomics, University of Miami, Miller School of Medicine, Miami, FL, USA.,Dr John T Macdonald Foundation, Department of Human Genetics and Genomics, University of Miami, Miller School of Medicine, Miami, FL, USA
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Seo D, Rhee Y. Osteitis fibrosa cystica in primary hyperparathyroidism. QJM 2015; 108:991. [PMID: 26261355 DOI: 10.1093/qjmed/hcv144] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Affiliation(s)
- D Seo
- Department of Internal Medicine, Endocrine Research Institute, Yonsei University College of Medicine, Seoul, Korea
| | - Y Rhee
- Department of Internal Medicine, Endocrine Research Institute, Yonsei University College of Medicine, Seoul, Korea.
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20
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Shim YS, Kim S, Seo D, Park HJ, Ha J. Rapid Method for Determination of Anthocyanin Glucosides and Free Delphinidin in Grapes Using u-HPLC. J Chromatogr Sci 2013; 52:629-35. [DOI: 10.1093/chromsci/bmt091] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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21
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O M, Seo D, Kwak M, Shin J. 56 Serum Procalcitonin and C-reactive Protein Level as a Early Diagnostic Marker of Bacterial Meningitis in the Emergency Department. Ann Emerg Med 2012. [DOI: 10.1016/j.annemergmed.2012.06.335] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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22
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Ha J, Shim YS, Seo D, Kim K, Ito M, Nakagawa H. Determination of 22 Ginsenosides in Ginseng Products using Ultra-High-Performance Liquid Chromatography. J Chromatogr Sci 2012; 51:355-60. [DOI: 10.1093/chromsci/bms148] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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23
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Moreira EG, Seo D, Vasconcellos MBA, Saiki M. Trace element determination in a mussel reference material using short irradiation instrumental neutron activation analysis. J Radioanal Nucl Chem 2012. [DOI: 10.1007/s10967-012-2084-4] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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24
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Seo D, Vasconcellos MBA, Catharino MGM, Moreira EG, de Sousa ECPM, Saiki M. Vanadium determination in Perna perna mussels (Linnaeus, 1758: Mollusca, Bivalvia) by instrumental neutron activation analysis using the passive biomonitoring in the Santos coast, Brazil. J Radioanal Nucl Chem 2012. [DOI: 10.1007/s10967-012-2048-8] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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25
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Wang C, Seo D, Geib R, Wroblewski N, Van Puymbroeck M, Kolbe L. OA13.04. Physical health benefits of health Qigong and Energize programs in American elementary school classrooms. Altern Ther Health Med 2012. [PMCID: PMC3373475 DOI: 10.1186/1472-6882-12-s1-o52] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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26
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Wang C, Seo D, Geib R, Wroblewski N, Van Puymbroeck M. P03.15. Developing a Health Qigong program for children: a 16-week curriculum. BMC Complement Altern Med 2012. [PMCID: PMC3373707 DOI: 10.1186/1472-6882-12-s1-p268] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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27
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Jeon T, Seo D, Kwon SJ, Kang J. Quantitative PCR for etiologic diagnosis of methicillin-resistant Staphylococcus aureus pneumonia in intensive care unit. BMC Proc 2011. [PMCID: PMC3239801 DOI: 10.1186/1753-6561-5-s6-p66] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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28
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Ahn S, Kim W, Sohn C, Kim W, Lim K, Seo D. 257 Potassium Measurement With Point-of-Care Blood Gas Analyzer in Cardiac Arrest. Ann Emerg Med 2011. [DOI: 10.1016/j.annemergmed.2011.06.287] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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29
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Muraki N, Seo D, Sakurai T, Kurisu G. Crystal structure of ferredoxin-NAD(P) +reductase from Rhodopseudomonas palustris. Acta Crystallogr A 2011. [DOI: 10.1107/s010876731108041x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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30
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Seo D, Vasconcellos MBA, Saiki M, Catharino MGM, Moreira EG, de Sousa ECPM, Pereira CDS. Vanadium biomonitoring by using Perna perna (Linnaeus, 1758) mussels transplanted in the coast of the State of São Paulo, Brazil. J Radioanal Nucl Chem 2011. [DOI: 10.1007/s10967-011-1238-0] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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31
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Lee YH, Judge AD, Seo D, Kitade M, Gómez-Quiroz LE, Ishikawa T, Andersen JB, Kim BK, Marquardt JU, Raggi C, Avital I, Conner EA, MacLachlan I, Factor VM, Thorgeirsson SS. Molecular targeting of CSN5 in human hepatocellular carcinoma: a mechanism of therapeutic response. Oncogene 2011; 30:4175-84. [PMID: 21499307 PMCID: PMC3140552 DOI: 10.1038/onc.2011.126] [Citation(s) in RCA: 60] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Development of targeted therapy for hepatocellular carcinoma (HCC) remains a major challenge. We have recently identified an elevated expression of the fifth subunit of COP9 signalosome (CSN5) in early HCC as compared to dysplastic stage. In the present study, we explored the possibility of CSN5 being a potential therapeutic target for HCC. Our results show that CSN5 knockdown by small interfering (si) RNA caused a strong induction of apoptosis and inhibition of cell cycle progression in HCC cells in vitro. The downregulation of CSN5 was sufficient to interfere with CSN function as evidenced by the accumulation of neddylated Cullin1 and changes in the protein levels of CSN controlled substrates SKP2, p53, p27 and NF-kB, albeit to a different degree depending on the HCC cell line, which could account for the CSN5 knockdown phenotype. The transcriptomic analysis of CSN5 knockdown signature showed that the anti-proliferative effect was driven by a common subset of molecular alterations including downregulation of CDK6 and ITGB1, which were functionally interconnected with key oncogenic regulators MYC and TGFβ1 involved in the control of proliferation, apoptotic cell death and HCC progression. Consistent with microarray analysis, western blotting revealed that CSN5 depletion increased phosphorylation of Smad 2/3, key mediators of TGFβ1 signaling, decreased the protein levels of ITGB1, CDK6, and cyclin D1 and caused reduced expression of anti-apoptotic Bcl-2 while elevating the levels of pro-apoptotic Bak. A chemically modified variant of CSN5 siRNA was then selected for in vivo application based on the growth inhibitory effect and minimal induction of unwanted immune response. Systemic delivery of the CSN5 3/8 variant by stable-nucleic-acid-lipid-particles (SNALP) significantly suppressed the tumor growth in Huh7-luc+ orthotopic xenograft model. Taken together, these results indicate that CSN5 plays a pivotal role in HCC pathogenesis and maybe an attractive molecular target for systemic HCC therapy.
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Affiliation(s)
- Y-H Lee
- Laboratory of Experimental Carcinogenesis, Center for Cancer Research, National Cancer Institute, National Institute of Health, Bethesda, MD, USA
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Kang M, Lee J, Kim T, Lee S, Park D, Seo D, Kim M. Randomized phase II trial of S-1 and cisplatin versus gemcitabine and cisplatin in advanced biliary tract adenocarcinoma. J Clin Oncol 2010. [DOI: 10.1200/jco.2010.28.15_suppl.4029] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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33
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Lee S, Kwon H, Kim S, Oh S, Kwon K, Lee JH, Lee Y, Seo D, Han J, Kim H. Identification of genes with different methylation profiles between RAEB and RCMD in myelodysplastic syndrome. J Clin Oncol 2010. [DOI: 10.1200/jco.2010.28.15_suppl.6608] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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34
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Seo D, Lacadie C, Bergquist K, Sinha R. Decreased Activity in Brain Regions of Emotion Regulation Predicted Alcohol Cravings during Stress and Alcohol-cue Exposures in Individuals with Alcohol Dependence. Neuroimage 2009. [DOI: 10.1016/s1053-8119(09)71362-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
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35
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Hwang JY, Yoo C, Kim T, Lee J, Park D, Seo D, Lee S, Kim M, Han D, Kim S, Lee J. A randomized phase II study of FOLFOX or FOLFIRI.3 as second-line therapy in patients with advanced pancreatic cancer previously treated with gemcitabine-based chemotherapy. J Clin Oncol 2009. [DOI: 10.1200/jco.2009.27.15_suppl.4618] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
4618 Background: Only few clinical trials have been conducted in patients with advanced pancreatic cancer after failure of first-line gemcitabine-based chemotherapy. We conducted a randomized phase II trial of modified FOLFOX vs. modified FOLFIRI.3 as second-line regimen for the patients with gemcitabine refractory pancreatic cancer ( NCT00786006 ). Methods: Patients with advanced pancreatic adenocarcinoma previously treated with gemcitabine were randomly assigned to FOLFOX or FOLFIRI.3 stratifying by age (≤ 65 vs. >65), performance status (0–1 vs. 2) and prior response to gemcitabine (PR/SD vs. PD). FOlFIRI.3 regimen consisted of Irinotecan 70 mg/m2 (over 60 min) D1, leucovorin 400 mg/m2 (over 2h) D1, 5-FU 2000 mg/m2 (over 46 hours) from D1, then irinotecan 70 mg/m2 (over 60 min) at the end of the 5-FU infusion every two week. FOLFOX regimen is composed of oxaliplatin 85 mg/m2 (over 120 min) D1, LV 400 mg/m2 D1, 5-FU 2,000 mg/m2 (over 46 hours) every two week. The primary end-point was 6-month overall survival (P0=20%) and Simon-Wittes-Ellenberg design was used to calculate the sample size (29 evaluable patients for each treatment arm). Results: From January 2007 to December 2008, sixty patients were enrolled and randomized to FOLFOX (N=30) or FOLFIRI.3 (N=30). Baseline characteristics were well balanced between each arm; median age 56 (35–60) vs. 56 yo (37–73); ECOG PS 0/1/2, 5/24/1 vs. 5/25/0; prior response to gemcitabine-based chemotherapy PR/SD/PD 10/13/7 vs. 10/11/9. With a median follow-up period of 6.0 months (95% CI, 4.7–7.3) the median overall survival was 4.0 months in both group (HR=0.95, 95% CI 0.52–1.75) with 6-month survival rates of 25% and 20%, respectively. The median PFS was 1.4 months for FOLFOX and 1.9 months for FOLFIRI.3 (HR=1.11, 95% CI, 0.64–1.92). Disease control (PR+SD) was achieved in 20% (5/25 in FOLFOX) and 28% (7/25 in FOLFIRI.3) of patients with measurable disease. The incidences of grade 3/4 toxicities were similar in both groups. Conclusions: Both FOLFOX and FOLFIRI.3 were tolerated with manageable toxicity, offering modest activity as second-line treatment of patients with advanced or metastatic pancreatic cancer, previously treated with gemcitabine. No significant financial relationships to disclose.
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Affiliation(s)
- J. Y. Hwang
- Seoul Asan Medical Center, Seoul, Republic of Korea
| | - C. Yoo
- Seoul Asan Medical Center, Seoul, Republic of Korea
| | - T. Kim
- Seoul Asan Medical Center, Seoul, Republic of Korea
| | - J. Lee
- Seoul Asan Medical Center, Seoul, Republic of Korea
| | - D. Park
- Seoul Asan Medical Center, Seoul, Republic of Korea
| | - D. Seo
- Seoul Asan Medical Center, Seoul, Republic of Korea
| | - S. Lee
- Seoul Asan Medical Center, Seoul, Republic of Korea
| | - M. Kim
- Seoul Asan Medical Center, Seoul, Republic of Korea
| | - D. Han
- Seoul Asan Medical Center, Seoul, Republic of Korea
| | - S. Kim
- Seoul Asan Medical Center, Seoul, Republic of Korea
| | - J. Lee
- Seoul Asan Medical Center, Seoul, Republic of Korea
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Lee J, Lee S, Kim T, Lee J, Park D, Seo D, Lee S, Kim M, Han D, Kim S. Phase II trial of neoadjuvant fixed dose rate (FDR) gemcitabine with capecitabine (GX) combination chemotherapy in locally advanced pancreatic adenocarcinoma (LAPA). J Clin Oncol 2009. [DOI: 10.1200/jco.2009.27.15_suppl.e15553] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
e15553 Background: To determine the efficacy and safety of fixed dose rate (FDR) gemcitabine and capecitaibne (GX) combination chemotherapy for locally advanced pancreatic adenocarcinoma Methods: Patients with histologically confirmed LAPA were eligible for this prospective phase II trial. Dynamic pancreas/pelvic CT, MRI and FDG-PET were undertaken to assess the resectability. EUS was also performed as needed basis. ‘Borderline resectable (BR)’ and ‘unresectable (UR)’ criteria developed by our pancreatico-biliary multidisciplinary management team (PBMMT) and NCCN criteria were used. After confirmation of resectability, patients received 3 cycles of FDR gemcitabine 1,250 mg/m2 on D1 and D8 and capecitabine 950 mg/m2 from D1-D14 every 3 weeks. Thereafter, staging was repeated and patients underwent surgery if the disease was not unresectable. For patients with R0 resection, additional 6 cycles of GX were administered. For patients with R1 resection, chemoradiotherapy (CRT) (54 Gy over 5 weeks with concurrent 5-FU and leucovorin or capecitabine) followed by FDR-GX was administered. Patients with stable or better response to chemotherapy but assessed unresectable at reassessment received additional chemotherapy up to 9 cycles followed by CRT. Results: Between August 2006 and July 2008, 38 eligible patients (14 with BR and 24 with UR based on NCCN criteria; 29 with BR and 9 with UR based on our PBMMT criteria) entered on this study. The median age was 61 yo (42–76) and 71% had cT4 disease. The response to neoadjuvant chemotherapy was PR in 6 (16%), SD in 26 (68%) and PD in 3 (8%). Metabolic response was achieved in 20 patients (53%) with 2 metabolic CR out of 31 evaluable patients. Grade 3 or worse adverse effects were mainly HFS (n=5) and gastrointestinal (n=3) with no grade 4 in severity. Surgery was performed in 9 patients (24.0%, R0=8, R1=1, 6 in NCCN-BR and 3 in NCCN-UR, 9 in PBMMT-BR) and five patients refused surgery although their diseases seemed not to be unresectable. The median PFS was 9.4 months (95% CI, 8.3–10.4) and estimated median OS was 13.5 months (95% CI, 12.4- 14.5). Conclusions: FDR-GX was effective as neoadjuvnat chemotherapy in LAPA with favorable toxicity profile. No significant financial relationships to disclose.
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Affiliation(s)
- J. Lee
- Asan Medical Center, Seoul, Republic of Korea
| | - S. Lee
- Asan Medical Center, Seoul, Republic of Korea
| | - T. Kim
- Asan Medical Center, Seoul, Republic of Korea
| | - J. Lee
- Asan Medical Center, Seoul, Republic of Korea
| | - D. Park
- Asan Medical Center, Seoul, Republic of Korea
| | - D. Seo
- Asan Medical Center, Seoul, Republic of Korea
| | - S. Lee
- Asan Medical Center, Seoul, Republic of Korea
| | - M. Kim
- Asan Medical Center, Seoul, Republic of Korea
| | - D. Han
- Asan Medical Center, Seoul, Republic of Korea
| | - S. Kim
- Asan Medical Center, Seoul, Republic of Korea
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Yeo U, Kim W, Oh B, Seo D. 184: The Value of a Biomarker Panel Test for Acute Stroke in Emergency Department. Ann Emerg Med 2008. [DOI: 10.1016/j.annemergmed.2008.06.201] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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38
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Shiba T, Muraki N, Seo D, Sakurai T, Kurisu G. Crystallographic studies of ferredoxin-NAD(P)+ reductase from Chlorobium tepidum. Acta Crystallogr A 2008. [DOI: 10.1107/s010876730809140x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
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39
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Wang L, Hauser ER, Shah SH, Seo D, Sivashanmugam P, Exum ST, Gregory SG, Granger CB, Haines JL, Jones CJH, Crossman D, Haynes C, Kraus WE, Freedman NJ, Pericak-Vance MA, Goldschmidt-Clermont PJ, Vance JM. Polymorphisms of the tumor suppressor gene LSAMP are associated with left main coronary artery disease. Ann Hum Genet 2008; 72:443-53. [PMID: 18318786 DOI: 10.1111/j.1469-1809.2008.00433.x] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
Previous association mapping on chromosome 3q13-21 detected evidence for association at the limbic system-associated membrane protein (LSAMP) gene in individuals with late-onset coronary artery disease (CAD). LSAMP has never been implicated in the pathogenesis of CAD. We sought to thoroughly characterize the association and the gene. Non-redundant single nucleotide polymorphisms (SNPs) across the gene were examined in an initial dataset (168 cases with late-onset CAD, 149 controls). Stratification analysis on left main CAD (N = 102) revealed stronger association, which was further validated in a validation dataset (141 cases with left main CAD, 215 controls), a third control dataset (N = 255), and a family-based dataset (N = 2954). A haplotype residing in a novel alternative transcript of the LSAMP gene was significant in all independent case-control datasets (p = 0.0001 to 0.0205) and highly significant in the joint analysis (p = 0.00004). Lower expression of the novel alternative transcript was associated with the risk haplotype (p = 0.0002) and atherosclerosis burden in human aortas (p = 0.0001). Furthermore, silencing LSAMP expression in human aortic smooth muscle cells (SMCs) substantially augmented SMC proliferation (p<0.01). Therefore, the risk conferred by the LSAMP haplotype appears to be mediated by LSAMP down-regulation, which may promote SMC proliferation in the arterial wall and progression of atherosclerosis.
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Affiliation(s)
- L Wang
- Miami Institute of Human Genomics, University of Miami, Miami, FL 33101, USA
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Seo D, Kim JS, Chang E. Application of medium class land cover maps to AVSWAT2000 for the prediction of inflow, CBOD, TN and TP for Yongdam Lake, Korea. Water Sci Technol 2007; 55:513-8. [PMID: 17305177 DOI: 10.2166/wst.2007.011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/14/2023]
Abstract
This study tests the efficacy of using medium class land cover maps vs. the large class maps produced by the Korean Ministry of Environment for prediction of flow and CBOD, TN and TP concentrations. AVSWAT2000 was chosen as a model to process information for a sample site, Yongdam Lake watershed area, Korea. The watershed was divided into 11 sub-watersheds, as was done for implementation of the Total Waste Load Management Act by the Korean government. Calibration of AVSWAT2000 was performed using a trial-and-error method, by comparing the root mean square errors of the observed data and calculated results. This study suggests that AVSWAT2000 can be successfully applied in estimating pollutant load considering hydrologic and site-specific conditions of watersheds. With further study, this approach may be applied to improve watershed-scale water quality management strategies, especially for TMDL developments.
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Affiliation(s)
- D Seo
- Dept of Environmental Eng., Chungnam National University, 220 Gung-dong, Yuseong-gu, Daejeon, 305-764, Korea.
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41
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Karra R, Vemullapalli S, Dong C, Herderick E, Song X, Slosek K, Nevins J, West M, Goldschmidt-Clermont P, Seo D. Stem Cells of Aging Donors—Insufficient Capacity to Repair Causes Progression of Atherosclerosis in the Recipient. J Am Soc Nephrol 2006. [DOI: 10.1681/asn.2005121279] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022] Open
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Abstract
Iron-sulfur clusters are the terminal electron acceptors of the photosynthetic reaction centers of green sulfur bacteria and photosystem I. We have studied electron-transfer reactions involving these clusters in the green sulfur bacterium Chlorobium tepidum, using flash-absorption spectroscopic measurements. We show for the first time that three different clusters, named F(X), F(1), and F(2), can be photoreduced at room temperature during a series of consecutive flashes. The rates of electron escape to exogenous acceptors depend strongly upon the number of reduced clusters. When two or three clusters are reduced, the escape is biphasic, with the fastest phase being 12-14-fold faster than the slowest phase, which is similar to that observed after single reduction. This is explained by assuming that escape involves mostly the second reducible cluster. Evidence is thus provided for a functional asymmetry between the two terminal acceptors F(1) and F(2). From multiple-flash experiments, it was possible to derive the intrinsic recombination rates between P840(+) and reduced iron-sulfur clusters: values of 7, 14, and 59 s(-1) were found after one, two and three electron reduction of the clusters, respectively. The implications of our results for the relative redox potentials of the three clusters are discussed.
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Affiliation(s)
- P Sétif
- Commissariat à l'Energie Atomique, Département de Biologie Cellulaire et Moléculaire, Section de Bioénergétique and CNRS URA 2096, 91191 Gif sur Yvette, France.
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Lee S, Seo D, Kim HW, Jung S. Investigation of inclusion complexation of paclitaxel by cyclohenicosakis-(1-->2)-(beta-D-glucopyranosyl), by cyclic-(1-->2)-beta-D-glucans (cyclosophoraoses), and by cyclomaltoheptaoses (beta-cyclodextrins). Carbohydr Res 2001; 334:119-26. [PMID: 11502267 DOI: 10.1016/s0008-6215(01)00178-1] [Citation(s) in RCA: 44] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Inclusion complexation of the poorly soluble drug, paclitaxel, was investigated with various host cyclooligosaccharides such as a family of isolated neutral cyclohenicosakis-(1-->2)-(beta-D-glucopyranosyl) (cyclic-(1-->2)-beta-D-glucans, cyclosophoraoses), dimethyl cyclomaltoheptaose (cyclodextrins, DM-beta-CD) and hydroxypropyl cyclomaltoheptaose (cyclodextrins, HP-beta-CD). Quantitative analysis with high-performance liquid chromatography (HPLC) indicated that all three cyclic oligosaccharides could increase the solubility of paclitaxel, where DM-beta-CD gave the best results and a family of cyclosophoraoses and HP-beta-CD, both gave similar results. Complexation of host molecules with paclitaxel was studied by NMR and fluorescence spectroscopic analyses. NMR spectroscopic analysis showed that the aromatic regions of paclitaxel experienced noticeable changes of the chemical shifts or peak shapes upon interaction with host molecules. The relatively bulky cyclosophoraoses allowed favorable accessibility to either the B-ring or A-ring of paclitaxel, while DM-beta-CD and HP-beta-CD allowed accessibility to all the aromatic rings including the C ring. The interaction of DM-beta-CD with paclitaxel greatly increased the fluorescence intensity compared with other host molecules, suggesting the more effective partitioning of a moderate fluorophore into a hydrophobic cluster adjacent to the C-ring of paclitaxel.
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Affiliation(s)
- S Lee
- Department of Microbial Engineering, Konkuk University, Hwayang-dong 1, Gwangjin-gu, 143-701, Seoul, South Korea
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Seo D, Tomioka A, Kusumoto N, Kamo M, Enami I, Sakurai H. Purification of ferredoxins and their reaction with purified reaction center complex from the green sulfur bacterium Chlorobium tepidum. Biochim Biophys Acta 2001; 1503:377-84. [PMID: 11115649 DOI: 10.1016/s0005-2728(00)00245-0] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
Four ferredoxin (Fd) fractions, namely, FdA-D were purified from the green sulfur bacterium Chlorobium tepidum. Their absorption spectra are typical of 2[4Fe-4S] cluster type Fds with peaks at about 385 and 280 nm and a shoulder at about 305 nm. The A(385)/A(280) ratios of the purified Fds were 0.76-0.80. Analysis of the N-terminal amino acid sequences of these Fds (15-25 residues) revealed that those of FdA and FdB completely agree with those deduced from the genes, fdx3 and fdx2, respectively, found in this bacterium (Chung and Bryant, personal communication). The N-terminal amino acid sequences of FdC and FdD (15 residues) were identical, and agree with that deduced from the gene fdx1 (Chung and Bryant, personal communication). The A(385) values of these Fds were unchanged when they were stored for a month at -80 degrees C under aerobic conditions and decreased by 10-15% when they were stored for 6 days at 4 degrees C under aerobic conditions, indicating that they are not extremely unstable. In the presence of Fd-NADP(+) reductase from spinach, and a purified reaction center (RC) preparation from C. tepidum composed of five kinds of polypeptides, these Fds supported the photoreduction of NADP(+) at room temperature with the following K(m) and V(max) (in micromol NADP(+) micromol BChl a(-1) h(-1)): FdA, 2.0 microm and 258; FdB, 0.49 microM and 304; FdC, 1.13 microM and 226; FdD, 0.5 microM and 242; spinach Fd, 0.54 microM and 183. The V(max) value of FdB was more than twice that previously reported for purified RC preparations from green sulfur bacteria.
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Affiliation(s)
- D Seo
- Department of Biology, School of Education, Waseda University, Tokyo, Japan.
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Kusumoto N, Sétif P, Brettel K, Seo D, Sakurai H. Electron transfer kinetics in purified reaction centers from the green sulfur bacterium Chlorobium tepidum studied by multiple-flash excitation. Biochemistry 1999; 38:12124-37. [PMID: 10508417 DOI: 10.1021/bi990452s] [Citation(s) in RCA: 22] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Reaction center preparations from the green sulfur bacterium Chlorobium tepidum, which contain monoheme cytochrome c, were studied by flash-absorption spectroscopy in the near-UV, visible, and near-infrared regions. The decay kinetics of the photooxidized primary donor P840(+), together with the amount of photooxidized cytochrome c, were analyzed along a series of four flashes spaced by 1 ms: 95% of the P840(+) was reduced by cytochrome c with a t(1/2) of approximately 65 micros after the first flash, 80% with a t(1/2) of approximately 100 micros after the second flash, and 23% with a t(1/2) of approximately 100 micros after the third flash; after the fourth flash, almost no cytochrome c oxidation occurred. The observed rates, the establishment of redox equilibrium after each flash, and the total amount of photooxidizable cytochrome c are consistent with the presence of two equivalent cytochrome c molecules per photooxidizable P840. The data are well fitted assuming a standard free energy change DeltaG degrees of -53 meV for electron transfer from one cytochrome c to P840(+), DeltaG degrees being independent of the oxidation state of the other cytochrome c. These observations support a model with two monoheme cytochromes c which are symmetrically arranged around the reaction center core. From the ratio of menaquinone-7 to the bacteriochlorophyll pigment absorbing at 663 nm, it was estimated that our preparations contain 0.6-1.2 menaquinone-7 molecules per reaction center. However, no transient signal due to menaquinone could be observed between 360 and 450 nm in the time window from 10 ns to 4 micros. No recombination reaction between the primary partners P840(+) and A(0)(-) could be detected under normal conditions. Such a recombination was observed (t(1/2) approximately 19 ns) under highly reducing conditions or after accumulation of three electrons on the acceptor side during a series of flashes, showing that the secondary acceptors can stabilize three electrons. From our data, there is no evidence for involvement of menaquinone in charge separation in the reaction center of green sulfur bacteria.
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Affiliation(s)
- N Kusumoto
- Department of Biology, School of Education, Waseda University, Tokyo, Japan
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