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Nakagawa S, Carnevali D, Tan X, Alvarez MJ, Parfitt DE, Di Vicino U, Arumugam K, Shin W, Aranda S, Normanno D, Sebastian-Perez R, Cannatá C, Cortes P, Neguembor MV, Shen MM, Califano A, Cosma MP. The Wnt-dependent master regulator NKX1-2 controls mouse pre-implantation development. Stem Cell Reports 2024; 19:689-709. [PMID: 38701778 DOI: 10.1016/j.stemcr.2024.04.004] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2022] [Revised: 04/04/2024] [Accepted: 04/05/2024] [Indexed: 05/05/2024] Open
Abstract
Embryo size, specification, and homeostasis are regulated by a complex gene regulatory and signaling network. Here we used gene expression signatures of Wnt-activated mouse embryonic stem cell (mESC) clones to reverse engineer an mESC regulatory network. We identify NKX1-2 as a novel master regulator of preimplantation embryo development. We find that Nkx1-2 inhibition reduces nascent RNA synthesis, downregulates genes controlling ribosome biogenesis, RNA translation, and transport, and induces severe alteration of nucleolus structure, resulting in the exclusion of RNA polymerase I from nucleoli. In turn, NKX1-2 loss of function leads to chromosome missegregation in the 2- to 4-cell embryo stages, severe decrease in blastomere numbers, alterations of tight junctions (TJs), and impairment of microlumen coarsening. Overall, these changes impair the blastocoel expansion-collapse cycle and embryo cavitation, leading to altered lineage specification and developmental arrest.
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Affiliation(s)
- Shoma Nakagawa
- Center for Genomic Regulation (CRG), The Barcelona Institute of Science and Technology, Dr. Aiguader 88, 08003 Barcelona, Spain
| | - Davide Carnevali
- Center for Genomic Regulation (CRG), The Barcelona Institute of Science and Technology, Dr. Aiguader 88, 08003 Barcelona, Spain
| | - Xiangtian Tan
- Department of Systems Biology, Columbia University, New York, NY, USA
| | - Mariano J Alvarez
- Department of Systems Biology, Columbia University, New York, NY, USA; DarwinHealth Inc, New York, NY, USA
| | - David-Emlyn Parfitt
- Departments of Medicine, Genetics and Development, Urology, and Systems Biology, Herbert Irving Comprehensive Cancer Center, Vagelos College of Physicians and Surgeons, Columbia University, New York, NY, USA
| | - Umberto Di Vicino
- Center for Genomic Regulation (CRG), The Barcelona Institute of Science and Technology, Dr. Aiguader 88, 08003 Barcelona, Spain
| | - Karthik Arumugam
- Center for Genomic Regulation (CRG), The Barcelona Institute of Science and Technology, Dr. Aiguader 88, 08003 Barcelona, Spain
| | - William Shin
- Department of Systems Biology, Columbia University, New York, NY, USA
| | - Sergi Aranda
- Center for Genomic Regulation (CRG), The Barcelona Institute of Science and Technology, Dr. Aiguader 88, 08003 Barcelona, Spain
| | - Davide Normanno
- Center for Genomic Regulation (CRG), The Barcelona Institute of Science and Technology, Dr. Aiguader 88, 08003 Barcelona, Spain; Institute of Human Genetics, CNRS, Montpellier, France
| | - Ruben Sebastian-Perez
- Center for Genomic Regulation (CRG), The Barcelona Institute of Science and Technology, Dr. Aiguader 88, 08003 Barcelona, Spain
| | - Chiara Cannatá
- Center for Genomic Regulation (CRG), The Barcelona Institute of Science and Technology, Dr. Aiguader 88, 08003 Barcelona, Spain
| | - Paola Cortes
- Center for Genomic Regulation (CRG), The Barcelona Institute of Science and Technology, Dr. Aiguader 88, 08003 Barcelona, Spain
| | - Maria Victoria Neguembor
- Center for Genomic Regulation (CRG), The Barcelona Institute of Science and Technology, Dr. Aiguader 88, 08003 Barcelona, Spain
| | - Michael M Shen
- Department of Systems Biology, Columbia University, New York, NY, USA; Departments of Medicine, Genetics and Development, Urology, and Systems Biology, Herbert Irving Comprehensive Cancer Center, Vagelos College of Physicians and Surgeons, Columbia University, New York, NY, USA
| | - Andrea Califano
- Department of Systems Biology, Columbia University, New York, NY, USA; Herbert Irving Comprehensive Cancer Center, Columbia University, New York, NY, USA; Department of Biochemistry and Molecular Biophysics, Vagelos College of Physicians and Surgeons, Columbia University, New York, NY, USA; Department of Biomedical Informatics, Vagelos College of Physicians and Surgeons, Columbia University, New York, NY, USA; Department of Medicine, Vagelos College of Physicians and Surgeons, Columbia University, New York, NY, USA; Chan Zuckerberg Biohub New York, New York, NY, USA.
| | - Maria Pia Cosma
- Center for Genomic Regulation (CRG), The Barcelona Institute of Science and Technology, Dr. Aiguader 88, 08003 Barcelona, Spain; ICREA, Pg.Lluis Companys 23, 08010 Barcelona, Spain; Universitat Pompeu Fabra (UPF), Barcelona, Spain; Medical Research Institute, Guangdong Provincial People's Hospital (Guangdong Academy of Medical Sciences), Southern Medical University, 106 Zhongshan Er Road, Yuexiu District, Guangzhou 510080, China.
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Lartey R, Nanavati A, Kim J, Li M, Xu K, Nakamura K, Shin W, Winalski CS, Obuchowski N, Bahroos E, Link TM, Hardy PA, Peng Q, Kim J, Liu K, Fung M, Wu C, Li X. Reproducibility of T 1ρ and T 2 quantification in a multi-vendor multi-site study. Osteoarthritis Cartilage 2023; 31:249-257. [PMID: 36370959 PMCID: PMC10016129 DOI: 10.1016/j.joca.2022.10.017] [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] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/17/2022] [Revised: 10/08/2022] [Accepted: 10/10/2022] [Indexed: 11/11/2022]
Abstract
OBJECTIVE To evaluate the multi-vendor multi-site reproducibility of two-dimensional (2D) multi-echo spin-echo (MESE) T2 mapping (product sequences); and to evaluate the longitudinal reproducibility of three-dimensional (3D) magnetization-prepared angle-modulated partitioned k-space spoiled gradient echo snapshots (MAPSS) T1ρ and T2 mapping (research sequences), and 2D MESE T2 mapping, separated by 6 months, in a multi-vendor multi-site setting. METHODS Phantoms and volunteers (n = 5 from each site, n = 20 in total) were scanned on four 3 T magnetic resonance (MR) systems from four sites and three vendors (Siemens, General Electric, and Phillips). Two traveling volunteers (3 knees) scanned at all 4 sites at baseline and 6-month follow-up. Data was transferred to one site for centralized processing. Coefficients of variation (CVs) were calculated to evaluate reproducibility. RESULTS For baseline 2D MESE T2 measures, average CV were 0.37-2.45% (intra-site) and 5.96% (inter-site) for phantoms, and 3.15-8.49% (intra-site) and 14.16% (inter-site) for volunteers. For longitudinal phantom data, intra-site CVs were 1.42-3.48% for 3D MAPSS T1ρ, 1.77-3.56% for 3D MAPSS T2, and 1.02-2.54% for 2D MESE T2. For the longitudinal volunteer data, the intra-site CVs were 2.60-4.86% for 3D MAPSS T1ρ, 3.33-7.25% for 3D MAPSS T2, and 3.11-8.77% for 2D MESE T2. CONCLUSION This study demonstrated excellent intra-site reproducibility of 2D MESE T2 imaging, while its inter-site variation was slightly higher than 3D MAPSS T2 imaging (10.06% as previously reported). This study also showed excellent reproducibility of longitudinal T1ρ and T2 cartilage quantification, in a multi-vendor multi-site setting for both product 2D MESE T2 and 3D MAPSS T1p/T2 research sequences.
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Affiliation(s)
- R Lartey
- Program of Advanced Musculoskeletal Imaging (PAMI), Cleveland Clinic, OH, USA; Department of Biomedical Engineering, Lerner Research Institute, Cleveland Clinic, OH, USA
| | - A Nanavati
- Program of Advanced Musculoskeletal Imaging (PAMI), Cleveland Clinic, OH, USA; Department of Biomedical Engineering, Lerner Research Institute, Cleveland Clinic, OH, USA
| | - J Kim
- Program of Advanced Musculoskeletal Imaging (PAMI), Cleveland Clinic, OH, USA; Department of Biomedical Engineering, Lerner Research Institute, Cleveland Clinic, OH, USA
| | - M Li
- Program of Advanced Musculoskeletal Imaging (PAMI), Cleveland Clinic, OH, USA; Department of Biomedical Engineering, Lerner Research Institute, Cleveland Clinic, OH, USA
| | - K Xu
- Program of Advanced Musculoskeletal Imaging (PAMI), Cleveland Clinic, OH, USA; Department of Biomedical Engineering, Lerner Research Institute, Cleveland Clinic, OH, USA
| | - K Nakamura
- Program of Advanced Musculoskeletal Imaging (PAMI), Cleveland Clinic, OH, USA; Department of Biomedical Engineering, Lerner Research Institute, Cleveland Clinic, OH, USA
| | - W Shin
- Program of Advanced Musculoskeletal Imaging (PAMI), Cleveland Clinic, OH, USA; Department of Diagnostic Radiology, Imaging Institute, Cleveland Clinic, OH, USA
| | - C S Winalski
- Program of Advanced Musculoskeletal Imaging (PAMI), Cleveland Clinic, OH, USA; Department of Biomedical Engineering, Lerner Research Institute, Cleveland Clinic, OH, USA; Department of Diagnostic Radiology, Imaging Institute, Cleveland Clinic, OH, USA
| | - N Obuchowski
- Program of Advanced Musculoskeletal Imaging (PAMI), Cleveland Clinic, OH, USA; Quantitative Health Sciences, Lerner Research Institute, Cleveland Clinic, OH, USA
| | - E Bahroos
- Department of Radiology and Biomedical Imaging, University of California, San Francisco (UCSF), CA, USA
| | - T M Link
- Department of Radiology and Biomedical Imaging, University of California, San Francisco (UCSF), CA, USA
| | - P A Hardy
- Department of Radiology, University of Kentucky, Lexington KY, USA
| | - Q Peng
- Department of Radiology, Albert Einstein College of Medicine and Montefiore Medical Center, Bronx, NY, USA
| | - J Kim
- Arthritis Foundation, GA, USA
| | - K Liu
- Siemens Medical Solution Inc., USA
| | - M Fung
- GE Healthcare, Waukesha, WI, USA
| | - C Wu
- Department of Medical Physics, Memorial Sloan Kettering Cancer Center, New York, NY, USA
| | - X Li
- Program of Advanced Musculoskeletal Imaging (PAMI), Cleveland Clinic, OH, USA; Department of Biomedical Engineering, Lerner Research Institute, Cleveland Clinic, OH, USA; Department of Diagnostic Radiology, Imaging Institute, Cleveland Clinic, OH, USA.
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Labit E, Sinha S, Kutluberk E, Jaffer A, Arora R, Cao L, Shin W, Rosin N, Yipp B, Biernaskie J. 753 Preferential recruitment of immature neutrophils enables robust skin regeneration. J Invest Dermatol 2022. [DOI: 10.1016/j.jid.2022.05.766] [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: 10/17/2022]
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Thakore AH, Nguyen J, Pollack S, Shlofmitz E, Mei W, Jayam V, Shin W, Stern J, Hoch D, Levine J. IS AN INITIAL ATRIAL FIBRILLATION EPISODE ONE AND DONE? A PROSPECTIVE IMPLANTABLE LOOP RECORDER ANALYSIS. J Am Coll Cardiol 2021. [DOI: 10.1016/s0735-1097(21)01589-8] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Arumugam K, Shin W, Schiavone V, Vlahos L, Tu X, Carnevali D, Kesner J, Paull EO, Romo N, Subramaniam P, Worley J, Tan X, Califano A, Cosma MP. The Master Regulator Protein BAZ2B Can Reprogram Human Hematopoietic Lineage-Committed Progenitors into a Multipotent State. Cell Rep 2020; 33:108474. [PMID: 33296649 DOI: 10.1016/j.celrep.2020.108474] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2019] [Revised: 09/25/2020] [Accepted: 11/12/2020] [Indexed: 01/03/2023] Open
Abstract
Bi-species, fusion-mediated, somatic cell reprogramming allows precise, organism-specific tracking of unknown lineage drivers. The fusion of Tcf7l1-/- murine embryonic stem cells with EBV-transformed human B cell lymphocytes, leads to the generation of bi-species heterokaryons. Human mRNA transcript profiling at multiple time points permits the tracking of the reprogramming of B cell nuclei to a multipotent state. Interrogation of a human B cell regulatory network with gene expression signatures identifies 8 candidate master regulator proteins. Of these 8 candidates, ectopic expression of BAZ2B, from the bromodomain family, efficiently reprograms hematopoietic committed progenitors into a multipotent state and significantly enhances their long-term clonogenicity, stemness, and engraftment in immunocompromised mice. Unbiased systems biology approaches let us identify the early driving events of human B cell reprogramming.
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Affiliation(s)
- Karthik Arumugam
- Center for Genomic Regulation (CRG), The Barcelona Institute of Science and Technology, Dr. Aiguader 88, 08003 Barcelona, Spain
| | - William Shin
- Department of Systems Biology, Columbia University, New York, NY, USA
| | - Valentina Schiavone
- Center for Genomic Regulation (CRG), The Barcelona Institute of Science and Technology, Dr. Aiguader 88, 08003 Barcelona, Spain
| | - Lukas Vlahos
- Department of Systems Biology, Columbia University, New York, NY, USA
| | - Xiaochuan Tu
- Center for Genomic Regulation (CRG), The Barcelona Institute of Science and Technology, Dr. Aiguader 88, 08003 Barcelona, Spain; Universitat Pompeu Fabra (UPF), Dr. Aiguader 88, 08003 Barcelona, Spain
| | - Davide Carnevali
- Center for Genomic Regulation (CRG), The Barcelona Institute of Science and Technology, Dr. Aiguader 88, 08003 Barcelona, Spain
| | - Jordan Kesner
- Department of Systems Biology, Columbia University, New York, NY, USA
| | - Evan O Paull
- Department of Systems Biology, Columbia University, New York, NY, USA
| | - Neus Romo
- Center for Genomic Regulation (CRG), The Barcelona Institute of Science and Technology, Dr. Aiguader 88, 08003 Barcelona, Spain
| | - Prem Subramaniam
- Department of Systems Biology, Columbia University, New York, NY, USA
| | - Jeremy Worley
- Department of Systems Biology, Columbia University, New York, NY, USA
| | - Xiangtian Tan
- Department of Systems Biology, Columbia University, New York, NY, USA
| | - Andrea Califano
- Department of Systems Biology, Columbia University, New York, NY, USA; Herbert Irving Comprehensive Cancer Center, J.P. Sulzberger Columbia Genome Center, Department of Biomedical Informatics, Department of Biochemistry and Molecular Biophysics, Department of Medicine, Columbia University, New York, NY, USA.
| | - Maria Pia Cosma
- Center for Genomic Regulation (CRG), The Barcelona Institute of Science and Technology, Dr. Aiguader 88, 08003 Barcelona, Spain; Universitat Pompeu Fabra (UPF), Dr. Aiguader 88, 08003 Barcelona, Spain; ICREA, Pg. Lluís Companys 23, 08010 Barcelona, Spain; Bioland Laboratory, Guangzhou Regenerative Medicine and Health Guangdong Laboratory, Guangzhou 510005, China; CAS Key Laboratory of Regenerative Biology, Guangdong Provincial Key Laboratory of Stem Cell and Regenerative Medicine, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou 510530, China.
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Blacksburg S, Sheu R, Carpenter T, Repka M, Demircioglu G, Witten M, Mendez C, Auto H, Shin W, Zafar S, Ilyas A, Haas J. Obstructive Uropathy after Prostate SBRT is Rare: Characterizing Clinical and Dosimetric Predictors From a Large Patient Cohort. Int J Radiat Oncol Biol Phys 2020. [DOI: 10.1016/j.ijrobp.2020.07.452] [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: 10/23/2022]
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7
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Eum H, Lee Y, Shin W, Jung H, Kwon M, Shim J, KIM D. PDB28 A Real-World Effectiveness of Udca Added to Oha on Glycemic Control in Type 2 Diabetes Patients with LIVER Disease. Value Health Reg Issues 2020. [DOI: 10.1016/j.vhri.2020.07.187] [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: 11/28/2022]
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Kim D, Shin W, Byun J. 1197 Utility of Fitbit Charge 2 for Sleep Monitoring in Patients With Obstructive Sleep Apnea. Sleep 2020. [DOI: 10.1093/sleep/zsaa056.1191] [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: 11/14/2022] Open
Abstract
Abstract
Introduction
The wearable device may be useful in monitoring sleep. Many studies reported reliable data in detecting sleep-wake states and sleep stage proportion in healthy adults, However, only a few validation studies were performed evaluating sleep using the wearable devices in patients with obstructive sleep apnea(OSA), which showed insufficient accuracy. We aimed to evaluate the reliability of multi-sensory wristband (Fitbit Charge 2) in patients with OSA.
Methods
This was a preliminary analysis of a prospective single-center observational study. Consecutive patients underwent standard Polysomnography (PSG) for evaluation of OSA with Fitbit Charge 2. Sleep data from PSG and Fitbit charge 2 were compared using paired t-tests and Bland-Altman plots.
Results
A total of eighty-six patients were analyzed. Four of them had poor data quality, 18 of them did not show sleep stages. Compared with the PSG, Fitbit Charge 2 showed higher total sleep time (419.1±194.0 vs 269.8±22.6, p<0.001) and sleep efficiency (95.8±2.5 vs 84.6±7.1, p<0.001). Those with sleep stage data showed higher sleep efficacy (87.7±5.5 vs 82.37.5, p=0.024) and a lower proportion of N1 sleep (33.7±19.9 vs 65.3±38.8, p=0.01).
Conclusion
Fitbit Charge 2 showed limited utility in monitoring sleep in patients with obstructive sleep apnea.
Support
none
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Affiliation(s)
- D Kim
- KyungHee University Hospital at Gangdong, Seoul, KOREA, REPUBLIC OF
| | - W Shin
- KyungHee University Hospital at Gangdong, Seoul, KOREA, REPUBLIC OF
| | - J Byun
- KyungHee University Hospital at Gangdong, Seoul, KOREA, REPUBLIC OF
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Shin W, Byun J. Efficacy of prolonged-release melatonin versus clonazepam for REM sleep without atonia in patients with newly diagnosed idiopathic REM sleep behavior disorder. J Neurol Sci 2019. [DOI: 10.1016/j.jns.2019.10.1806] [Citation(s) in RCA: 1] [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: 11/29/2022]
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Park J, Shin W. Posterior reversible encephalopathy syndrome after massive transfusion in a patient with postpartum vaginal hematoma. J Neurol Sci 2019. [DOI: 10.1016/j.jns.2019.10.1478] [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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11
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Chung S, Kim K, Shin W, Seong J. Determining and Incorporating the Optimal Predictive Biomarkers in Hepatocellular Carcinoma Patients Treated with Radiotherapy. Int J Radiat Oncol Biol Phys 2019. [DOI: 10.1016/j.ijrobp.2019.06.607] [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: 10/26/2022]
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12
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Shin W, Noh J, Lim M, Kang S, Seo S, Lee K, Kim B, Park S. The prognosis of epithelial ovarian cancer patients who are refractory after neoadjuvant chemotherapy. Gynecol Oncol 2019. [DOI: 10.1016/j.ygyno.2019.04.543] [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: 10/26/2022]
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13
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Shin W, Rosin N, Sparks H, Sinha S, Rahmani W, Workentine M, Abbasi S, Stratton J, Biernaskie J. 905 Dysfunction of hair follicle mesenchymal progenitors is associated with age-related hair loss. J Invest Dermatol 2019. [DOI: 10.1016/j.jid.2019.03.981] [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: 10/27/2022]
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Tomljanovic Z, Patel M, Shin W, Califano A, Teich AF. ZCCHC17 is a master regulator of synaptic gene expression in Alzheimer's disease. Bioinformatics 2018; 34:367-371. [PMID: 29028963 DOI: 10.1093/bioinformatics/btx608] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2017] [Accepted: 09/22/2017] [Indexed: 11/13/2022] Open
Abstract
Motivation In an effort to better understand the molecular drivers of synaptic and neurophysiologic dysfunction in Alzheimer's disease (AD), we analyzed neuronal gene expression data from human AD brain tissue to identify master regulators of synaptic gene expression. Results Master regulator analysis identifies ZCCHC17 as normally supporting the expression of a network of synaptic genes, and predicts that ZCCHC17 dysfunction in AD leads to lower expression of these genes. We demonstrate that ZCCHC17 is normally expressed in neurons and is reduced early in the course of AD pathology. We show that ZCCHC17 loss in rat neurons leads to lower expression of the majority of the predicted synaptic targets and that ZCCHC17 drives the expression of a similar gene network in humans and rats. These findings support a conserved function for ZCCHC17 between species and identify ZCCHC17 loss as an important early driver of lower synaptic gene expression in AD. Availability and implementation Matlab and R scripts used in this paper are available at https://github.com/afteich/AD_ZCC. Contact aft25@cumc.columbia.edu. Supplementary information Supplementary data are available at Bioinformatics online.
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Affiliation(s)
- Zeljko Tomljanovic
- Department of Pathology and Cell Biology.,Taub Institute for Research on Alzheimer's Disease and the Aging Brain
| | - Mitesh Patel
- Department of Pathology and Cell Biology.,Taub Institute for Research on Alzheimer's Disease and the Aging Brain
| | - William Shin
- Department of Systems Biology, Columbia University, New York, NY 10032, USA
| | - Andrea Califano
- Department of Systems Biology, Columbia University, New York, NY 10032, USA
| | - Andrew F Teich
- Department of Pathology and Cell Biology.,Taub Institute for Research on Alzheimer's Disease and the Aging Brain
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Shin Y, Byun J, Ahn S, Yang K, Cho Y, Shin W. 0554 Efficacy Of Dental Device For Treatment For Moderate To Severe Obstructive Sleep Apnea In Korean: Interim Result Of Prospective Multi-center Study. Sleep 2018. [DOI: 10.1093/sleep/zsy061.553] [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: 11/14/2022] Open
Affiliation(s)
- Y Shin
- Kyung-Hee University Hospital at Gangdong, Seoul, KOREA, REPUBLIC OF
| | - J Byun
- Kyung-Hee University Hospital at Gangdong, Seoul, KOREA, REPUBLIC OF
| | - S Ahn
- Kyung-Hee University Hospital at Gangdong, Seoul, KOREA, REPUBLIC OF
| | - K Yang
- SOON CHUN HYANG University Hospital Cheonan, Cheonan, KOREA, REPUBLIC OF
| | - Y Cho
- Keimyung University Dongsan Medical Center, Daegu, KOREA, REPUBLIC OF
| | - W Shin
- Kyung-Hee University Hospital at Gangdong, Seoul, KOREA, REPUBLIC OF
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Chung S, Byun J, Shin Y, Shin W. 0502 Alternative Stop-bang Questionnaire Scoring Criteria To Detect Obstructive Sleep Apnea In Korean Population. Sleep 2018. [DOI: 10.1093/sleep/zsy061.501] [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)
- S Chung
- Kyung-Hee University Hospital at Gangdong, Seoul, KOREA, REPUBLIC OF
| | - J Byun
- KyungHee University Hospital at Gangdong, Seoul, KOREA, REPUBLIC OF
| | - Y Shin
- KyungHee University Hospital at Gangdong, Seoul, KOREA, REPUBLIC OF
| | - W Shin
- KyungHee University Hospital at Gangdong, Seoul, KOREA, REPUBLIC OF
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Pachynski RK, Crowder R, Shin W, Rennier K. Effect of the leukocyte chemoattractant chemerin on PTEN via CMKLR1 in human prostate cancer. J Clin Oncol 2018. [DOI: 10.1200/jco.2018.36.6_suppl.282] [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
282 Background: Recent data in preclinical models has shown that phosphatase and tensin homolog (PTEN) loss correlated with decreased tumor immune cell infiltration as well as decreased response to T cell-based immunotherapy. Chemerin ( RARRES2) is a recently identified endogenous leukocyte chemoattractant shown to recruit innate immune cells through its G-protein coupled receptor CMKLR1. RARRES2 is commonly downregulated in prostate and other cancers (eg sarcoma) compared to their normal tissue counterparts. Our previous preclinical studies showed that forced overexpression of chemerin in tumors was capable of recruiting immune effector cells into the tumor microenvironment and suppressing tumor growth. Methods: Here, we investigate the effects of chemerin on tumor cell intrinsic processes by exposing prostate and sarcoma tumor lines to exogenous recombinant chemerin in vitro. Evaluation of PTEN was performed at both the mRNA and protein levels, using both quantitative PCR as well as Western blotting. PTEN immunoprecipitation by and Malachite Green assays were used to determine PTEN activity. In vitro invasion assays were performed to investigate the functional impact of chemerin exposure on tumor intrinsic activity. Knockdown of CMKLR1 using siRNA was performed to determine its role in tumor response. Results: Using both prostate and sarcoma tumor lines, we found exogenous chemerin was able to significantly upregulate PTEN expression at both the mRNA and protein levels in a dose-dependent manner. PTEN phosphatase activity was also significantly increased by chemerin. Exposure to chemerin did not result in increased apoptosis or altered in vitro proliferation. Importantly, chemerin treatment significantly decreased in vitro tumor invasion. Knockdown of CMKLR1 resulted in loss of chemerin-induced PTEN and PTEN activity and restored tumor migration, suggesting a link between this GPCR and PTEN. Conclusions: For the first time to our knowledge, we have shown a link between chemerin and PTEN expression and activity in both prostate and sarcoma tumor lines. This work has potential clinical implications on both tumor cell intrinsic and extrinsic responses to chemerin-based immunotherapeutic strategies.
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Affiliation(s)
| | - Robert Crowder
- Siteman Cancer Center at Washington University, St. Louis, MO
| | - William Shin
- Washington University in St. Louis School of Medicine, Saint Louis, Missouri, MO
| | - Keith Rennier
- Washington University in St. Louis School of Medicine, Saint Louis, Missouri, MO
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Han K, Kim M, Lee D, Won J, Park S, Kim G, Joon Ho K, Shin W. Hybrid treatment expanding the armamentarium for infected infrarenal abdominal aortic and iliac aneurysms. J Vasc Interv Radiol 2017. [DOI: 10.1016/j.jvir.2016.12.1017] [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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Hida T, Oya Y, Tanaka K, Yoshida T, Shimizu J, Horio Y, Yatabe Y, Itoh T, Shin W. 12P Volatolomic signatures of anaplastic lymphoma kinase gene rearrangement in adenocarcinoma. J Thorac Oncol 2016. [DOI: 10.1016/s1556-0864(16)30126-5] [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: 11/27/2022]
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Brichta L, Shin W, Jackson-Lewis V, Blesa J, Yap EL, Walker Z, Zhang J, Roussarie JP, Alvarez MJ, Califano A, Przedborski S, Greengard P. Identification of neurodegenerative factors using translatome-regulatory network analysis. Nat Neurosci 2015. [PMID: 26214373 PMCID: PMC4763340 DOI: 10.1038/nn.4070] [Citation(s) in RCA: 87] [Impact Index Per Article: 9.7] [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: 01/25/2023]
Abstract
For degenerative disorders of the CNS, the main obstacle to therapeutic advancement has been the challenge of identifying the key molecular mechanisms underlying neuronal loss. We developed a combinatorial approach including translational profiling and brain regulatory network analysis to search for key determinants of neuronal survival or death. Following the generation of transgenic mice for cell type-specific profiling of midbrain dopaminergic neurons, we established and compared translatome libraries reflecting the molecular signature of these cells at baseline or under degenerative stress. Analysis of these libraries by interrogating a context-specific brain regulatory network led to the identification of a repertoire of intrinsic upstream regulators that drive the dopaminergic stress response. The altered activity of these regulators was not associated with changes in their expression levels. This strategy can be generalized for the identification of molecular determinants involved in the degeneration of other classes of neurons.
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Affiliation(s)
- Lars Brichta
- Laboratory of Molecular and Cellular Neuroscience, The Rockefeller University, New York, New York, USA
| | - William Shin
- Department of Systems Biology, Columbia University, New York, New York, USA.,Department of Biological Sciences, Columbia University, New York, New York, USA
| | - Vernice Jackson-Lewis
- Department of Neurology, Columbia University, New York, New York, USA.,Department of Pathology and Cell Biology, Columbia University, New York, New York, USA.,Center for Motor Neuron Biology and Disease, Columbia University, New York, New York, USA.,Columbia Translational Neuroscience Initiative, Columbia University, New York, New York, USA
| | - Javier Blesa
- Department of Neurology, Columbia University, New York, New York, USA.,Department of Pathology and Cell Biology, Columbia University, New York, New York, USA.,Center for Motor Neuron Biology and Disease, Columbia University, New York, New York, USA.,Columbia Translational Neuroscience Initiative, Columbia University, New York, New York, USA
| | - Ee-Lynn Yap
- Laboratory of Molecular and Cellular Neuroscience, The Rockefeller University, New York, New York, USA
| | - Zachary Walker
- Laboratory of Molecular and Cellular Neuroscience, The Rockefeller University, New York, New York, USA
| | - Jack Zhang
- Laboratory of Molecular and Cellular Neuroscience, The Rockefeller University, New York, New York, USA
| | - Jean-Pierre Roussarie
- Laboratory of Molecular and Cellular Neuroscience, The Rockefeller University, New York, New York, USA
| | - Mariano J Alvarez
- Department of Systems Biology, Columbia University, New York, New York, USA
| | - Andrea Califano
- Department of Systems Biology, Columbia University, New York, New York, USA
| | - Serge Przedborski
- Department of Neurology, Columbia University, New York, New York, USA.,Department of Pathology and Cell Biology, Columbia University, New York, New York, USA.,Center for Motor Neuron Biology and Disease, Columbia University, New York, New York, USA.,Columbia Translational Neuroscience Initiative, Columbia University, New York, New York, USA
| | - Paul Greengard
- Laboratory of Molecular and Cellular Neuroscience, The Rockefeller University, New York, New York, USA
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21
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Choi H, Shin W, Kim J, Testa M, Min C. SU-E-T-427: Feasibility Study for Evaluation of IMRT Dose Distribution Using Geant4-Based Automated Algorithms. Med Phys 2015. [DOI: 10.1118/1.4924788] [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: 11/07/2022] Open
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Affiliation(s)
- E. Han
- Biopharmaceuticals and Herbal Medicines Evaluation Department; Korea Ministry of Food and Drug Safety; Cheongju-si Korea
| | - W. Shin
- Biopharmaceuticals and Herbal Medicines Evaluation Department; Korea Ministry of Food and Drug Safety; Cheongju-si Korea
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23
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Aubry S, Shin W, Crary JF, Lefort R, Qureshi YH, Lefebvre C, Califano A, Shelanski ML. Assembly and interrogation of Alzheimer's disease genetic networks reveal novel regulators of progression. PLoS One 2015; 10:e0120352. [PMID: 25781952 PMCID: PMC4363671 DOI: 10.1371/journal.pone.0120352] [Citation(s) in RCA: 74] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2014] [Accepted: 01/20/2015] [Indexed: 11/19/2022] Open
Abstract
Alzheimer's disease (AD) is a complex multifactorial disorder with poorly characterized pathogenesis. Our understanding of this disease would thus benefit from an approach that addresses this complexity by elucidating the regulatory networks that are dysregulated in the neural compartment of AD patients, across distinct brain regions. Here, we use a Systems Biology (SB) approach, which has been highly successful in the dissection of cancer related phenotypes, to reverse engineer the transcriptional regulation layer of human neuronal cells and interrogate it to infer candidate Master Regulators (MRs) responsible for disease progression. Analysis of gene expression profiles from laser-captured neurons from AD and controls subjects, using the Algorithm for the Reconstruction of Accurate Cellular Networks (ARACNe), yielded an interactome consisting of 488,353 transcription-factor/target interactions. Interrogation of this interactome, using the Master Regulator INference algorithm (MARINa), identified an unbiased set of candidate MRs causally responsible for regulating the transcriptional signature of AD progression. Experimental assays in autopsy-derived human brain tissue showed that three of the top candidate MRs (YY1, p300 and ZMYM3) are indeed biochemically and histopathologically dysregulated in AD brains compared to controls. Our results additionally implicate p53 and loss of acetylation homeostasis in the neurodegenerative process. This study suggests that an integrative, SB approach can be applied to AD and other neurodegenerative diseases, and provide significant novel insight on the disease progression.
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Affiliation(s)
- Soline Aubry
- Taub Institute for Research on Alzheimer's Disease & the Aging Brain and the Department of Pathology & Cell Biology, Columbia University, New York, NY, 10032, United States of America
| | - William Shin
- Department of Systems Biology, Columbia University, New York, NY, 10032, United States of America
- Herbert Irving Comprehensive Cancer Center, Columbia University, New York, NY, 10032, United States of America
- Department of Biological Sciences, Columbia University, New York, NY, 10027, United States of America
| | - John F. Crary
- Taub Institute for Research on Alzheimer's Disease & the Aging Brain and the Department of Pathology & Cell Biology, Columbia University, New York, NY, 10032, United States of America
| | - Roger Lefort
- Taub Institute for Research on Alzheimer's Disease & the Aging Brain and the Department of Pathology & Cell Biology, Columbia University, New York, NY, 10032, United States of America
| | - Yasir H. Qureshi
- Taub Institute for Research on Alzheimer's Disease & the Aging Brain and the Department of Pathology & Cell Biology, Columbia University, New York, NY, 10032, United States of America
| | - Celine Lefebvre
- Department of Systems Biology, Columbia University, New York, NY, 10032, United States of America
- Herbert Irving Comprehensive Cancer Center, Columbia University, New York, NY, 10032, United States of America
- Inserm Unit U981, Institut Gustave Roussy, 94805, Villejuif, France
| | - Andrea Califano
- Department of Systems Biology, Columbia University, New York, NY, 10032, United States of America
- Herbert Irving Comprehensive Cancer Center, Columbia University, New York, NY, 10032, United States of America
- Department of Biological Sciences, Columbia University, New York, NY, 10027, United States of America
| | - Michael L. Shelanski
- Taub Institute for Research on Alzheimer's Disease & the Aging Brain and the Department of Pathology & Cell Biology, Columbia University, New York, NY, 10032, United States of America
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24
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Repunte-Canonigo V, Shin W, Vendruscolo LF, Lefebvre C, van der Stap L, Kawamura T, Schlosburg JE, Alvarez M, Koob GF, Califano A, Sanna PP. Identifying candidate drivers of alcohol dependence-induced excessive drinking by assembly and interrogation of brain-specific regulatory networks. Genome Biol 2015; 16:68. [PMID: 25886852 PMCID: PMC4410476 DOI: 10.1186/s13059-015-0593-5] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.3] [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: 03/29/2014] [Accepted: 01/21/2015] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND A systems biology approach based on the assembly and interrogation of gene regulatory networks, or interactomes, was used to study neuroadaptation processes associated with the transition to alcohol dependence at the molecular level. RESULTS Using a rat model of dependent and non-dependent alcohol self-administration, we reverse engineered a global transcriptional regulatory network during protracted abstinence, a period when relapse rates are highest. We then interrogated the network to identify master regulator genes that mechanistically regulate brain region-specific signatures associated with dependent and non-dependent alcohol self-administration. Among these, the gene coding for the glucocorticoid receptor was independently identified as a master regulator in multiple brain regions, including the medial prefrontal cortex, nucleus accumbens, central nucleus of the amygdala, and ventral tegmental area, consistent with the view that brain reward and stress systems are dysregulated during protracted abstinence. Administration of the glucocorticoid antagonist mifepristone in either the nucleus accumbens or ventral tegmental area selectively decreased dependent, excessive, alcohol self-administration in rats but had no effect on non-dependent, moderate, alcohol self-administration. CONCLUSIONS Our study suggests that assembly and analysis of regulatory networks is an effective strategy for the identification of key regulators of long-term neuroplastic changes within specific brain regions that play a functional role in alcohol dependence. More specifically, our results support a key role for regulatory networks downstream of the glucocorticoid receptor in excessive alcohol drinking during protracted alcohol abstinence.
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Affiliation(s)
- Vez Repunte-Canonigo
- Molecular and Integrative Neuroscience Department, The Scripps Research Institute, La Jolla, CA, USA.
| | - William Shin
- Department of Biological Sciences, Columbia University, New York, NY, 10027, USA. .,Department of Systems Biology, Herbert Irving Comprehensive Cancer Center, Columbia University, New York, NY, 10032, USA.
| | - Leandro F Vendruscolo
- Committee for the Neurobiology of Addictive Disorders, The Scripps Research Institute, La Jolla, CA, USA. .,Current affiliation: Intramural Research Program, NIDA-NIH, Baltimore, MD, 21224, USA.
| | - Celine Lefebvre
- Department of Systems Biology, Herbert Irving Comprehensive Cancer Center, Columbia University, New York, NY, 10032, USA. .,Current affiliation: Inserm Unit U981, Gustave Roussy Institute, Villejuif, France.
| | - Lena van der Stap
- Molecular and Integrative Neuroscience Department, The Scripps Research Institute, La Jolla, CA, USA.
| | - Tomoya Kawamura
- Molecular and Integrative Neuroscience Department, The Scripps Research Institute, La Jolla, CA, USA.
| | - Joel E Schlosburg
- Committee for the Neurobiology of Addictive Disorders, The Scripps Research Institute, La Jolla, CA, USA.
| | - Mariano Alvarez
- Department of Systems Biology, Herbert Irving Comprehensive Cancer Center, Columbia University, New York, NY, 10032, USA.
| | - George F Koob
- Committee for the Neurobiology of Addictive Disorders, The Scripps Research Institute, La Jolla, CA, USA. .,Current affiliation: National Institute on Alcohol Abuse and Alcoholism, Rockville, MD, 20852, USA.
| | - Andrea Califano
- Department of Systems Biology, Herbert Irving Comprehensive Cancer Center, Columbia University, New York, NY, 10032, USA. .,Department of Biomedical Informatics, Herbert Irving Comprehensive Cancer Center, Columbia University, New York, NY, 10032, USA. .,Institute for Cancer Genetics, Herbert Irving Comprehensive Cancer Center, Columbia University, New York, NY, 10032, USA. .,Department of Biochemistry and Molecular Biophysics, Hammer Health Sciences Center, Columbia University, New York, NY, 10032, USA. .,Cancer Regulatory Network Program, Herbert Irving Comprehensive Cancer Center, Columbia University, New York, NY, 10032, USA. .,The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, CA, 92037, USA.
| | - Pietro Paolo Sanna
- Molecular and Integrative Neuroscience Department, The Scripps Research Institute, La Jolla, CA, USA.
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Abstract
In the articles included in this volume, one feels a strong frustration among the writers with the slow course of therapeutics development for Alzheimer's disease and with the clinical failure of targeted therapeutic agents despite substantial progress in our understanding of the biology and biochemistry of the disease.
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Affiliation(s)
- Michael Shelanski
- Department of Pathology and Cell Biology, Columbia University, New York, NY, 10032, USA,
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Banks SJ, Obuchowski N, Shin W, Lowe M, Phillips M, Modic M, Bernick C. The Protective Effect of Education on Cognition in Professional Fighters. Arch Clin Neuropsychol 2013; 29:54-9. [DOI: 10.1093/arclin/act079] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [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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Shin W, Mahmoud SY, Sakaie K, Banks SJ, Lowe MJ, Phillips M, Modic MT, Bernick C. Diffusion measures indicate fight exposure-related damage to cerebral white matter in boxers and mixed martial arts fighters. AJNR Am J Neuroradiol 2013; 35:285-90. [PMID: 23928146 DOI: 10.3174/ajnr.a3676] [Citation(s) in RCA: 59] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
BACKGROUND AND PURPOSE Traumatic brain injury is common in fighting athletes such as boxers, given the frequency of blows to the head. Because DTI is sensitive to microstructural changes in white matter, this technique is often used to investigate white matter integrity in patients with traumatic brain injury. We hypothesized that previous fight exposure would predict DTI abnormalities in fighting athletes after controlling for individual variation. MATERIALS AND METHODS A total of 74 boxers and 81 mixed martial arts fighters were included in the analysis and scanned by use of DTI. Individual information and data on fight exposures, including number of fights and knockouts, were collected. A multiple hierarchical linear regression model was used in region-of-interest analysis to test the hypothesis that fight-related exposure could predict DTI values separately in boxers and mixed martial arts fighters. Age, weight, and years of education were controlled to ensure that these factors would not account for the hypothesized effects. RESULTS We found that the number of knockouts among boxers predicted increased longitudinal diffusivity and transversal diffusivity in white matter and subcortical gray matter regions, including corpus callosum, isthmus cingulate, pericalcarine, precuneus, and amygdala, leading to increased mean diffusivity and decreased fractional anisotropy in the corresponding regions. The mixed martial arts fighters had increased transversal diffusivity in the posterior cingulate. The number of fights did not predict any DTI measures in either group. CONCLUSIONS These findings suggest that the history of fight exposure in a fighter population can be used to predict microstructural brain damage.
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Affiliation(s)
- W Shin
- From the Imaging Institute (W.S., S.Y.M., K.S., M.J.L., M.P.)
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Siver PA, Wolfe AP, Rohlf FJ, Shin W, Jo BY. Combining geometric morphometrics, molecular phylogeny, and micropaleontology to assess evolutionary patterns in Mallomonas (Synurophyceae: Heterokontophyta). Geobiology 2013; 11:127-138. [PMID: 23331313 DOI: 10.1111/gbi.12023] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/31/2012] [Accepted: 11/21/2012] [Indexed: 06/01/2023]
Abstract
Synurophytes, also known as scaled chrysophytes, are ecologically important algae that produce an array of siliceous structures upon which their taxonomy is based. Despite occupying a key position within the photosynthetic heterokonts, the evolutionary history of synurophytes remains poorly constrained. Here, modern and Middle Eocene siliceous scales of the morphotaxon Mallomonas insignis are used as a model to investigate synurophyte evolutionary patterns. Structural details of scale morphology were examined comparatively with scanning electron microscopy and scored for geometric morphometric analyses to assess the stability of shape characters. Although consistent size differences exist (modern scales are larger than Eocene counterparts), the populations cannot be differentiated on the basis of shape or microstructural detail, implying considerable evolutionary stasis in scale morphology. A time-calibrated relaxed molecular clock analysis using a three-gene concatenated data set (27 strains) suggests that the M. insignis lineage predates the available fossil record, having diverged from closest congeneric taxa in the Cretaceous (≥94 Ma). However, the molecular analysis also implies that considerable genetic variability is present within several morphotaxa of Mallomonas, implying that substantial genetic variability has arisen despite the retention of uniform scale morphologies, and resulting in the widespread occurrence of cryptic taxa. Results from the synurophyte lineage are consistent with the notion of protracted ghost ranges (>10 Ma) implied by the molecular phylogenies of other algal groups, together pointing to the paucity of the fossil record of these organisms on these timescales.
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Affiliation(s)
- P A Siver
- Department of Botany, Connecticut College, New London, CT, USA
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29
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Jung C, Shin W, Yu BA, Lee YL, Noh YC. Enhanced 355-nm generation using a simple method to compensate for walk-off loss. Opt Express 2012; 20:941-948. [PMID: 22274441 DOI: 10.1364/oe.20.000941] [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: 05/31/2023]
Abstract
We theoretically and experimentally investigated a novel walk-off-compensation method for efficient ultraviolet beam generation. Through theoretical investigation, we described in detail how the power of a generated UV beam can be enhanced by the method; thus, we obtained a brief expression for the output power which has a prediction error of about 30%. In addition, we found that the beam quality can also be enhanced using this method. Through experiments using an alpha barium borate crystal as a walk-off compensator, we found that the power of the generated ultraviolet beam increased 1.9 times.
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Affiliation(s)
- C Jung
- Advanced Photonics Research Institute, Gwangju Institute of Science and Technology, Buk-gu, Gwangju, South Korea
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30
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Shin W, Nishibori M, Izu N, Itoh T, Matsubara I, Nose K, Shimouchi A. Monitoring Breath Hydrogen Using Thermoelectric Sensor. ACTA ACUST UNITED AC 2011. [DOI: 10.1166/sl.2011.1591] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Shin W, Yan J, Abratte CM, Vermeylen F, Caudill MA. Choline intake exceeding current dietary recommendations preserves markers of cellular methylation in a genetic subgroup of folate-compromised men. J Nutr 2010; 140:975-80. [PMID: 20220206 PMCID: PMC2855263 DOI: 10.3945/jn.110.121186] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Severe choline deficiency adversely affects cellular methylation and DNA integrity, with potentially serious implications for disease risk. As part of a 12-wk controlled choline intervention study conducted in folate-compromised Mexican-American men (n = 60; 18-55 y) differing in the methylenetetrahydrofolate reductase (MTHFR) C677T genotype (21 677CC, 29 677TT), this study evaluated the effects of varied choline intakes (300, 550, 1100, and 2200 mg/d) on the change (i.e. wk 12-0) in markers of cellular methylation and DNA integrity. Choline intake affected the change in plasma S-adenosylmethionine (P = 0.044), with decreases tending to be greater (P < or = 0.08) in the 300 and 550 mg/d groups than in the 2200 mg/d group. Choline intake also interacted with the MTHFR C677T genotype to affect the change in genomic DNA methylation and DNA damage. In men with the MTHFR 677CC genotype, choline intake affected (P = 0.007) the change in DNA methylation, with a greater decrease (P < 0.02) in the 300 mg/d group than in the 1100 and 2200 mg/d groups. In men with the MTHFR 677CC genotype, choline intake also affected (P = 0.047) the change in DNA damage, with the increase tending to be greater (P = 0.07) in the 550 mg/d group than in the 2200 mg/d group. Choline intake did not affect these variables in men with the MTHFR 677TT genotype. Overall, these data suggest that choline intake exceeding current dietary recommendations preserves markers of cellular methylation and attenuates DNA damage in a genetic subgroup of folate-compromised men.
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Affiliation(s)
- William Shin
- Human Nutrition and Food Science Department, Cal Poly Pomona University, Pomona, CA 91768; Division of Nutritional Sciences and Genomics and; Cornell Statistical Consulting Unit, Cornell University, Ithaca, NY 14853
| | - Jian Yan
- Human Nutrition and Food Science Department, Cal Poly Pomona University, Pomona, CA 91768; Division of Nutritional Sciences and Genomics and; Cornell Statistical Consulting Unit, Cornell University, Ithaca, NY 14853
| | - Christian M. Abratte
- Human Nutrition and Food Science Department, Cal Poly Pomona University, Pomona, CA 91768; Division of Nutritional Sciences and Genomics and; Cornell Statistical Consulting Unit, Cornell University, Ithaca, NY 14853
| | - Francoise Vermeylen
- Human Nutrition and Food Science Department, Cal Poly Pomona University, Pomona, CA 91768; Division of Nutritional Sciences and Genomics and; Cornell Statistical Consulting Unit, Cornell University, Ithaca, NY 14853
| | - Marie A. Caudill
- Human Nutrition and Food Science Department, Cal Poly Pomona University, Pomona, CA 91768; Division of Nutritional Sciences and Genomics and; Cornell Statistical Consulting Unit, Cornell University, Ithaca, NY 14853,To whom correspondence should be addressed. E-mail:
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32
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Lee YL, Shin W, Yu BA, Jung C, Noh YC, Ko DK. Mode tailoring in a ridge-type periodically poled lithium niobate waveguide. Opt Express 2010; 18:7678-7684. [PMID: 20588608 DOI: 10.1364/oe.18.007678] [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] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
We present a simple and powerful method for mode generation and transformation in a ridge-type periodically poled lithium niobate (PPLN) waveguide by the use of second-order nonlinear effect and local-temperature-control technique. We show that a Hermite-Gaussian (HG) mode wave (among HG(00) to HG(22)) can be selectively generated via the quasi-phase-matching (QPM) nonlinear process in a PPLN waveguide by tuning the wavelength of fundamental wave or the temperature of the waveguide. As well, it is demonstrated that HG mode can be transformed into Laguerre-Gaussian (LG) one via combination of HG modes which are simultaneously generated in a single PPLN waveguide with local-temperature-control technique.
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Affiliation(s)
- Y L Lee
- Advanced Photonics Research Institute, Gwangju Institute of Science and Technology, 1 Oryong-dong, Buk-gu, Gwangju 500-712, Republic of Korea.
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Shin W, Geng X, Gu H, Yang Y. A New Brain Tissue Segmentation Algorithm Using Quantitative T1. Neuroimage 2009. [DOI: 10.1016/s1053-8119(09)71148-6] [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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Lee YL, Eom TJ, Shin W, Yu BA, Ko DK, Kim WK, Lee HY. Characteristics of a multi-mode interference device based on Ti:LiNbO3 channel waveguide. Opt Express 2009; 17:10718-10724. [PMID: 19550468 DOI: 10.1364/oe.17.010718] [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] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
We have analyzed the multi-mode interference effect depending on the wavelength and the polarization states of input beam in a multi-mode Ti:LiNbO(3) waveguide at about 1300 nm region. The transmitted optical signal of a Ti:LiNbO(3) waveguide shows the periodic oscillation as a function of input wavelength. The measured average periodicity of the oscillation in TM and TE polarization beams were about 18 nm and 48 nm, respectively. Actually, the periodicity is determined by the refractive index difference between the two modes (fundamental and first modes). Therefore, we have explained the experimental results with the theoretical calculations which are derived from a quasi-analytical technique based on the effective-refractive- index method and the equation of coupling length determined by the mode phase factor in the multi-mode waveguide.
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Affiliation(s)
- Y L Lee
- Advanced Photonics Research Institute, Gwangju Institute of Science and Technology, Buk-gu, Gwangju, Republic of Korea.
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35
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Shin W, Vasquez M, Moriarty D, Caudill MA. Lymphocyte DNA strand breakage declines in Mexican American men with the MTHFR 677TT genotype in a folate deplete environment. FASEB J 2008. [DOI: 10.1096/fasebj.22.1_supplement.894.3] [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: 11/11/2022]
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36
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Lee YL, Yu NE, Kee CS, Ko DK, Lee J, Yu BA, Shin W, Eom TJ, Noh YC. Wavelength filtering characteristics of Solc filter based on Ti:PPLN channel waveguide. Opt Lett 2007; 32:2813-5. [PMID: 17909582 DOI: 10.1364/ol.32.002813] [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] [Subscribe] [Scholar Register] [Indexed: 05/17/2023]
Abstract
We have analyzed the Solc filtering characteristics in a periodically poled Ti:LiNbO3 (Ti:PPLN) multimode waveguide. The single- and dual-wavelength filtering were achieved under the optimized guiding condition for the TEM(00)-like mode and two mode (TEM(00)- and TEM(01)-like mode), respectively. The full width at half-maximum of the filter was about 0.21 nm at both guiding conditions. We found that the origin of two peaks of the dual-wavelength Solc filter in the two-mode guiding condition is the different effective refractive index between the TEM(00)- and TEM(01)-like modes. The wavelength difference of two peaks is about 0.8 nm at room temperature.
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Affiliation(s)
- Y L Lee
- Nonlinear Optics Lab, Advanced Photonics Research Institute, Gwangju Institute of Science and Technology, Korea.
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Shaibani A, Khawar S, Shin W, Cashen TA, Schirf B, Rohany M, Kakodkar S, Carroll TJ. First results in an MR imaging--compatible canine model of acute stroke. AJNR Am J Neuroradiol 2006; 27:1788-93. [PMID: 16971637 PMCID: PMC8139778] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/11/2023]
Abstract
BACKGROUND AND PURPOSE The purpose of this work was to develop an MR imaging-compatible animal model of reversible embolic stroke. We hypothesize that real-time MR imaging of the brain can be performed during stroke thrombolysis and can provide real-time feedback and guidance on the success of thrombolysis. METHODS Embolic strokes were induced in 5 adult dogs by the use of autologous blood clots, with a sixth dog serving as an experimental control. Serial MR anatomic and physiologic imaging was performed to track the evolution of the stroke. The apparent diffusion coefficient (ADC) and quantitative cerebral blood flow (qCBF) were compared in the normal and stroke regions. During and after the administration of a chemical thrombolytic agent, MR imaging was performed to assess the outcome of the treatment. RESULTS Strokes were successfully created in 5 animals. No ADC or qCBF changes were observed in the control animal. Both ADC and qCBF values were found to be significantly different in the region affected by the stroke. Restoration of flow was observed in 1 case. CONCLUSION We have successfully implemented an MR imaging-compatible canine model of reversible embolic stroke.
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Affiliation(s)
- A Shaibani
- Department of Radiology, Northwestern University, Chicago, IL 60611, USA
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Cashen TA, Carr JC, Shin W, Walker MT, Futterer SF, Shaibani A, McCarthy RM, Carroll TJ. Intracranial time-resolved contrast-enhanced MR angiography at 3T. AJNR Am J Neuroradiol 2006; 27:822-9. [PMID: 16611772 PMCID: PMC8133971] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/08/2023]
Abstract
BACKGROUND AND PURPOSE A method is presented for high-temporal-resolution MR angiography (MRA) using a combination of undersampling strategies and a high-field (3T) scanner. Currently, the evaluation of cerebrovascular disorders involving arteriovenous shunting or retrograde flow is accomplished with conventional radiographic digital subtraction angiography, because of its high spatial and temporal resolutions. Multiphase MRA could potentially provide the same diagnostic information noninvasively, though this is technically challenging because of the inherent trade-off between signal intensity-to-noise ratio (S/N), spatial resolution, and temporal resolution in MR imaging. METHODS Numerical simulations addressed the choice of imaging parameters at 3T to maximize S/N and the data acquisition rate while staying within specific absorption rate limits. The increase in S/N at 3T was verified in vivo. An imaging protocol was developed with S/N, spatial resolution, and temporal resolution suitable for intracranial angiography. Partial Fourier imaging, parallel imaging, and the time-resolved echo-shared acquisition technique (TREAT) were all used to achieve sufficient undersampling. RESULTS In 40 volunteers and 10 patients exhibiting arteriovenous malformations or fistulas, intracranial time-resolved contrast-enhanced MRA with high acceleration at high field produced diagnostic-quality images suitable for assessment of pathologies involving arteriovenous shunting or retrograde flow. The technique provided spatial resolution of 1.1 x 1.1 x 2.5 mm and temporal resolution of 2.5 seconds/frame. The combination of several acceleration methods, each with modest acceleration, can provide a high overall acceleration without the artifacts of any one technique becoming too pronounced. CONCLUSION By taking advantage of the increased S/N provided by 3T magnets over conventional 1.5T magnets and converting this additional S/N into higher temporal resolution through acceleration strategies, intracranial time-resolved MRA becomes feasible.
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Affiliation(s)
- T A Cashen
- Department of Biomedical Engineering, Northwestern University, Feinberg School of Medicine of Northwestern University, Chicago, IL, USA
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Shin W, Han S, Park C, Oh K. All fiber optical inter-band router for broadband wavelength division multiplexing. Opt Express 2004; 12:1815-1822. [PMID: 19475011 DOI: 10.1364/opex.12.001815] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
We propose a new type of all-fiber device for inter-band router using a novel hybrid waveguide-MEMS technology. Both continuous and discrete band-routing functions are realized by precise twist control over the fused coupling region, which results in pi phase shift between the output ports. Experimentally we demonstrate inter-band routing functions between O and C-band as well as between E and L-band with a low insertion loss, wide bandwidth of operation, high channel isolation and fast response.
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Shin W, Choi S, Oh K. All-fiber wavelength- and mode-selective coupler for optical interconnections. Opt Lett 2002; 27:1884-1886. [PMID: 18033390 DOI: 10.1364/ol.27.001884] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
We experimentally demonstrate a new wavelength- and mode-selective coupler utilizing intermodal coupling between a standard single-mode fiber (SMF) and a hollow optical fiber (HOF). The fabricated device routes optical signals such that a 1.3-microm signal is directed to the HOF port, adiabatically converting the LP(01) mode into a ring-shaped mode, which can be further connected to a gigabit ethernet link, reducing the differential mode-dispersion penalty. Optical signals near 1.5microm , meanwhile, stay in the LP(01) mode of the SMF arm for further connection to conventional wavelength-division multiplexing links based on erbium-doped fiber amplifiers. The performance of the device is characterized in terms of insertion loss, channel isolation, and mode-conversion efficiency.
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Cho SW, Lee S, Shin W. The X-ray structure of Aspergillus aculeatus polygalacturonase and a modeled structure of the polygalacturonase-octagalacturonate complex. J Mol Biol 2001; 311:863-78. [PMID: 11518536 DOI: 10.1006/jmbi.2001.4919] [Citation(s) in RCA: 77] [Impact Index Per Article: 3.3] [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: 11/22/2022]
Abstract
Polygalacturonases hydrolyze the alpha-(1-4) glycosidic bonds of de-esterified pectate in the smooth region of the plant cell wall. Crystal structures of polygalacturonase from Aspergillus aculeatus were determined at pH 4.5 and 8.5 both to 2.0 A resolution. A. aculeatus polygalacturonase is a glycoprotein with one N and ten O-glycosylation sites and folds into a right-handed parallel beta-helix. The structures of the three independent molecules are essentially the same, showing no dependency on pH or crystal packing, and are very similar to that of Aspergillus niger polygalacturonase. However, the structures of the long T1 loop containing a catalytic tyrosine residue are significantly different in the two proteins. A three-dimensional model showing the substrate binding mode for a family 28 hydrolase was obtained by a combined approach of flexible docking, molecular dynamics simulations, and energy minimization. The octagalacturonate substrate was modeled as an unbent irregular helix with the -1 ring in a half-chair ((4)H(3)) form that approaches the transition state conformation. A comparative modeling of the three polygalacturonases with known structure shows that six subsites ranging from -4 to +2 are clearly defined but subsites -5 and +3 may or may not be shaped depending on the nearby amino acid residues. Both distal subsites are mostly exposed to the solvent region and have weak binding affinity even if they exist. The complex model provides a clear explanation for the functions, either in catalysis or in substrate binding, of all conserved amino acid residues in the polygalacturonase family of proteins. Modeling suggests that the role of the conserved Asn157 and Tyr270, which had previously been unidentified, may be in transition state stabilization. In A. niger polygalacturonase, the long T1 loop may have to undergo conformational change upon binding of the substrate to bring the tyrosine residue close to subsite -1.
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Affiliation(s)
- S W Cho
- School of Chemistry and Molecular Engineering, and Center for Molecular Catalysis, Seoul National University, Seoul, 151-742, Korea
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Cho SW, Kim N, Choi MU, Shin W. Structure of aspergillopepsin I from Aspergillus phoenicis: variations of the S1'-S2 subsite in aspartic proteinases. Acta Crystallogr D Biol Crystallogr 2001; 57:948-56. [PMID: 11418762 DOI: 10.1107/s0907444901005972] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/08/2000] [Accepted: 04/05/2001] [Indexed: 11/11/2022]
Abstract
The crystal structure of aspergillopepsin I (AP) from Aspergillus phoenicis has been determined at 2.18 A resolution and refined to R and R(free) factors of 21.5 and 26.0%, respectively. AP has the typical two beta-barrel domain structure of aspartic proteinases. The structures of the two independent molecules are partly different, exemplifying the flexible nature of the aspartic proteinase structure. Notably, the 'flap' in one molecule is closer, with a largest separation of 4.0 A, to the active site than in the other molecule. AP is most structurally homologous to penicillopepsin (PP) and then to endothiapepsin (EP), which share sequence identities of 68 and 56%, respectively. However, AP is similar to EP but differs from PP in the combined S1'-S2 subsite that is delineated by a flexible psi-loop in the C-terminal domain. The S1' and S2 subsites are well defined and small in AP, while there is no definite border between S1' and S2 and the open space for the S2 subsite is larger in PP. Comparison of the structures indicates that the two amino-acid residues equivalent to Leu295 and Leu297 of AP are the major determining factors in shaping the S1'-S2 subsite in the fungal aspartic proteinases.
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Affiliation(s)
- S W Cho
- School of Chemistry and Molecular Engineering, Seoul National University, South Korea
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Nam W, Lim MH, Oh SY, Lee JH, Lee HJ, Woo SK, Kim C, Shin W. Remarkable Anionic Axial Ligand Effects of Iron(III) Porphyrin Complexes on the Catalytic Oxygenations of Hydrocarbons by H(2)O(2) and the Formation of Oxoiron(IV) Porphyrin Intermediates by m-Chloroperoxybenzoic Acid This work was supported by Center for Cell Signaling Research (1999-2-122-002-4), the Korean Research Foundation (KRF-99-042-D00068), and the MOST through the Women's University Research Fund (99-N6-01-01-A-07). Angew Chem Int Ed Engl 2000; 39:3646-3649. [PMID: 11091426 DOI: 10.1002/1521-3773(20001016)39:20<3646::aid-anie3646>3.0.co;2-q] [Citation(s) in RCA: 90] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- W Nam
- Department of Chemistry and Division of Molecular Life Sciences Ewha Womans University, Seoul 120-750 (Korea)
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Oh YK, Moon J, Lee JY, Cho SW, Shin W, Suh SW. Overexpression, crystallization and preliminary X-ray crystallographic analysis of dihydrofolate reductase from bacteriophage T4. Acta Crystallogr D Biol Crystallogr 2000; 56:775-7. [PMID: 10818362 DOI: 10.1107/s0907444900005266] [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: 02/16/2023]
Abstract
Dihydrofolate reductase (DHFR) from bacteriophage T4 is a homodimer consisting of 193-residue subunits. It has been crystallized in the presence of the cofactor (NADPH) and an inhibitor (aminopterin) at 296 K using sodium chloride as precipitant. The crystals are tetragonal, belonging to the space group P4(1)22 (or P4(3)22), with unit-cell parameters a = b = 61.14, c = 123.23 A under cryogenic conditions. The asymmetric unit contains a single subunit, with a corresponding V(m) of 2.65 A(3) Da(-1) and a solvent content of 53. 6%. Native data have been collected from a crystal to 1.9 A resolution using synchrotron X-rays.
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Affiliation(s)
- Y K Oh
- Department of Chemistry, College of Natural Sciences, Seoul National University, South Korea
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Cho SW, Cho Y, Kim DK, Shin W. cis-[(4R,5R)-4,5-bis(aminomethyl)-2,2-dimethyl-1,3-dioxolane-N,N']- (malonato-O,O')platinum(II), an anticancer agent. Acta Crystallogr C 2000; 56:653-4. [PMID: 10902008 DOI: 10.1107/s0108270100003577] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2000] [Accepted: 03/07/2000] [Indexed: 11/11/2022] Open
Affiliation(s)
- S W Cho
- School of Chemistry & Molecular Engineering, Seoul National University, Korea
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Yoon JW, Yoon TS, Lee SW, Shin W. (1R,2R)-(–)-[Bis(3,5-di-tert-butylsalicylidene)-1,2-cyclohexanediamine]chloromanganese(III), an (R,R)-Jacobsen catalyst. Acta Crystallogr C 1999. [DOI: 10.1107/s0108270199009397] [Citation(s) in RCA: 4] [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: 11/11/2022] Open
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Heo YS, Yi KY, Yoo SE, Shin W. A non-peptide angiotensin II receptor antagonist: 2-butyl-6-methyl-5-(1-oxopyrid-2-yl)-1-{[2'-(1 H-tetrazol-5-yl)biphenyl-4-yl]methyl}-1 H-imidazo[5,4- b]pyridine methanol solvate. Acta Crystallogr C 1999. [DOI: 10.1107/s0108270199004679] [Citation(s) in RCA: 4] [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: 11/10/2022] Open
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Yoon TS, Yoo SE, Shin W. N-(2-Dimethoxymethyl-3-hydroxy-2-methyl-6-nitro-3,4-dihydro-2 H-1-benzopyran-4-yl)acetamide. Acta Crystallogr C 1998. [DOI: 10.1107/s0108270198000250] [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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Yoon JW, Yoon TS, Shin W. (1R,2R)-(−)-N,N'-Bis(3,5-di-tert-butylsalicylidene)-1,2-cyclohexanediamine: a Salen Ligand of Jacobsen's Catalyst. Acta Crystallogr C 1997. [DOI: 10.1107/s0108270197006379] [Citation(s) in RCA: 6] [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: 11/10/2022] Open
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