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Piperno-Neumann S, Carlino MS, Boni V, Loirat D, Speetjens FM, Park JJ, Calvo E, Carvajal RD, Nyakas M, Gonzalez-Maffe J, Zhu X, Shirley MD, Ramkumar T, Fessehatsion A, Burks HE, Yerramilli-Rao P, Kapiteijn E. A phase I trial of LXS196, a protein kinase C (PKC) inhibitor, for metastatic uveal melanoma. Br J Cancer 2023; 128:1040-1051. [PMID: 36624219 PMCID: PMC10006169 DOI: 10.1038/s41416-022-02133-6] [Citation(s) in RCA: 13] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2022] [Revised: 12/14/2022] [Accepted: 12/20/2022] [Indexed: 01/11/2023] Open
Abstract
BACKGROUND Up to 50% of patients with uveal melanoma develop metastases (MUM) with a poor prognosis and median overall survival of approximately 1 year. METHODS This phase I study evaluated the safety, tolerability, pharmacokinetics, pharmacodynamics and efficacy of the oral protein kinase C inhibitor LXS196 in 68 patients with MUM (NCT02601378). Patients received LXS196 doses ranging from 100-1000 mg once daily (QD; n = 38) and 200-400 mg twice daily (BID; n = 30). RESULTS First cycle dose-limiting toxicities (DLTs) were observed in 7/38 (18.4%) QD and 2/17 (11.8%) BID patients. Hypotension was the most common DLT, occurring at doses ≥500 mg/day, and manageable with LXS196 interruption and dose reduction. Median duration of exposure to LXS196 was 3.71 months (range: 1.81-15.28) for QD and 4.6 months (range: 0.33-58.32) for BID dosing. Clinical activity was observed in 6/66 (9.1%) evaluable patients achieving response (CR/PR), with a median duration of response of 10.15 months (range: 2.99-41.95); 45/66 had stable disease (SD) per RECIST v1.1. At 300 mg BID, the recommended dose for expansion, 2/18 (11.1%) evaluable patients achieved PR and 12/18 (66.7%) had SD. CONCLUSION These results suggest manageable toxicity and encouraging clinical activity of single-agent LXS196 in patients with MUM.
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Affiliation(s)
| | - M S Carlino
- Blacktown and Westmead Hospitals, Sydney, NSW, Australia.,Melanoma Institute Australia, The University of Sydney, Sydney, NSW, Australia
| | - V Boni
- START Madrid-CIOCC, Centro Integral Oncológico Clara Campal, Madrid, Spain
| | | | - F M Speetjens
- Leiden University Medical Center, Leiden, The Netherlands
| | - J J Park
- Blacktown and Westmead Hospitals, Sydney, NSW, Australia
| | - E Calvo
- START Madrid-CIOCC, Centro Integral Oncológico Clara Campal, Madrid, Spain
| | - R D Carvajal
- Columbia University Irving Medical Center, New York, NY, USA
| | - M Nyakas
- Oslo University Hospital, Oslo, Norway
| | | | - X Zhu
- Novartis Institutes for BioMedical Research, Cambridge, MA, USA
| | - M D Shirley
- Novartis Institutes for BioMedical Research, Cambridge, MA, USA
| | - T Ramkumar
- Novartis Institutes for BioMedical Research, Cambridge, MA, USA
| | - A Fessehatsion
- Novartis Institutes for BioMedical Research, Cambridge, MA, USA
| | - H E Burks
- Novartis Institutes for BioMedical Research, Cambridge, MA, USA
| | | | - E Kapiteijn
- Leiden University Medical Center, Leiden, The Netherlands
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2
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Dillard LR, Wase N, Ramakrishnan G, Park JJ, Sherman NE, Carpenter R, Young M, Donlan AN, Petri W, Papin JA. Leveraging metabolic modeling to identify functional metabolic alterations associated with COVID-19 disease severity. Metabolomics 2022; 18:51. [PMID: 35819731 PMCID: PMC9273921 DOI: 10.1007/s11306-022-01904-9] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/17/2021] [Accepted: 06/01/2022] [Indexed: 01/18/2023]
Abstract
OBJECTIVE Since the COVID-19 pandemic began in early 2020, SARS-CoV2 has claimed more than six million lives world-wide, with over 510 million cases to date. To reduce healthcare burden, we must investigate how to prevent non-acute disease from progressing to severe infection requiring hospitalization. METHODS To achieve this goal, we investigated metabolic signatures of both non-acute (out-patient) and severe (requiring hospitalization) COVID-19 samples by profiling the associated plasma metabolomes of 84 COVID-19 positive University of Virginia hospital patients. We utilized supervised and unsupervised machine learning and metabolic modeling approaches to identify key metabolic drivers that are predictive of COVID-19 disease severity. Using metabolic pathway enrichment analysis, we explored potential metabolic mechanisms that link these markers to disease progression. RESULTS Enriched metabolites associated with tryptophan in non-acute COVID-19 samples suggest mitigated innate immune system inflammatory response and immunopathology related lung damage prevention. Increased prevalence of histidine- and ketone-related metabolism in severe COVID-19 samples offers potential mechanistic insight to musculoskeletal degeneration-induced muscular weakness and host metabolism that has been hijacked by SARS-CoV2 infection to increase viral replication and invasion. CONCLUSIONS Our findings highlight the metabolic transition from an innate immune response coupled with inflammatory pathway inhibition in non-acute infection to rampant inflammation and associated metabolic systemic dysfunction in severe COVID-19.
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Affiliation(s)
- L R Dillard
- Department of Biochemistry & Molecular Genetics, University of Virginia, Charlottesville, VA, 22908, USA
| | - N Wase
- School of Medicine Core Facilities, University of Virginia, Charlottesville, VA, 22908, USA
| | - G Ramakrishnan
- Department of Medicine, Division of Infectious Diseases and International Health, University of Virginia, Charlottesville, VA, 22908, USA
| | - J J Park
- School of Medicine Core Facilities, University of Virginia, Charlottesville, VA, 22908, USA
| | - N E Sherman
- School of Medicine Core Facilities, University of Virginia, Charlottesville, VA, 22908, USA
| | - R Carpenter
- Department of Medicine, Division of Infectious Diseases and International Health, University of Virginia, Charlottesville, VA, 22908, USA
| | - M Young
- Department of Medicine, Division of Infectious Diseases and International Health, University of Virginia, Charlottesville, VA, 22908, USA
| | - A N Donlan
- Department of Medicine, Division of Infectious Diseases and International Health, University of Virginia, Charlottesville, VA, 22908, USA
| | - W Petri
- Department of Medicine, Division of Infectious Diseases and International Health, University of Virginia, Charlottesville, VA, 22908, USA
- Department of Microbiology, Immunology, and Cancer Biology, University of Virginia Health System, Charlottesville, VA, 22908, USA
| | - J A Papin
- Department of Biochemistry & Molecular Genetics, University of Virginia, Charlottesville, VA, 22908, USA.
- Department of Medicine, Division of Infectious Diseases and International Health, University of Virginia, Charlottesville, VA, 22908, USA.
- Department of Biomedical Engineering, University of Virginia, Health System, Box 800759, Charlottesville, VA, 22908, USA.
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3
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Borsuk DJ, Studniarek A, Al-Khamis A, Kochar K, Park JJ, Marecik SJ. Robotic excision of a difficult retrorectal cyst - a video vignette. Colorectal Dis 2020; 22:226-227. [PMID: 31553113 DOI: 10.1111/codi.14862] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/19/2019] [Accepted: 09/18/2019] [Indexed: 02/08/2023]
Affiliation(s)
- D J Borsuk
- Division of Colon and Rectal Surgery, Advocate Lutheran General Hospital, Park Ridge, IL, USA.,Department of Surgery, Michigan Medicine, University of Michigan, Ann Arbor, MI, USA
| | - A Studniarek
- Division of Colon and Rectal Surgery, Advocate Lutheran General Hospital, Park Ridge, IL, USA.,Division of Colon and Rectal Surgery, University of Illinois at Chicago, Chicago, IL, USA
| | - A Al-Khamis
- Division of Colon and Rectal Surgery, Advocate Lutheran General Hospital, Park Ridge, IL, USA
| | - K Kochar
- Division of Colon and Rectal Surgery, Advocate Lutheran General Hospital, Park Ridge, IL, USA
| | - J J Park
- Division of Colon and Rectal Surgery, Advocate Lutheran General Hospital, Park Ridge, IL, USA
| | - S J Marecik
- Division of Colon and Rectal Surgery, Advocate Lutheran General Hospital, Park Ridge, IL, USA.,Division of Colon and Rectal Surgery, University of Illinois at Chicago, Chicago, IL, USA
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4
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Kim JW, Park HJ, Yang SG, Kim MJ, Kim IS, Jegal HG, Wee G, Yang HY, Park JJ, Choo YK, Koo DB. Exogenous Ganglioside GT1b Enhances Porcine Oocyte Maturation, Including the Cumulus Cell Expansion and Activation of EGFR and ERK1/2 Signaling. Reprod Sci 2020; 27:278-289. [PMID: 32046393 DOI: 10.1007/s43032-019-00004-9] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [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: 10/04/2018] [Accepted: 03/29/2019] [Indexed: 11/26/2022]
Abstract
Ganglioside GT1b is well-known for its role in cytokine production and in activating epidermal growth factor receptor (EGFR)-mediated signaling pathways in cancer cells. However, there are no reports that clearly elucidate the role of GT1b in EGFR-mediated signaling pathways in porcine oocytes during the process of in vitro maturation (IVM). In this study, we investigated the role of GT1b in EGFR-mediated activation of the ERK1/2 pathway in porcine cumulus-oocyte complexes (COCs) at 44 h of IVM. Our data show that expression of the ST3GAL2 protein significantly increased in porcine COCs at 44 h irrespective of treatment with EGF. Meiotic maturation and mRNA levels of factors (HAS2, TNFAIP6, and PTX3) related to cumulus cell expansion significantly increased in COCs treated with 2 μM GT1b during IVM in the absence of EGF. They also increased in COCs treated with EGF/GT1b as compared to that in the other groups. Interestingly, protein levels of EGFR, phospho-EGFR, ERK1/2, and phospho-ERK1/2 dramatically increased in COCs treated with EGF/GT1b. Moreover, the rate of fertilization and the developmental competence of blastocyst were significantly higher in EGF/GT1b-treated COCs. Taken together, these results suggest that exogenous GT1b improves meiotic maturation and cumulus cell expansion in porcine COCs via activation of EGFR-mediated ERK1/2 signaling.
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Affiliation(s)
- Jin-Woo Kim
- Department of Biotechnology, College of Engineering, Daegu University, 201 Daegudae-ro, Jillyang, Gyeongsan, Gyeongbuk, 38453, Republic of Korea
| | - Hyo-Jin Park
- Department of Biotechnology, College of Engineering, Daegu University, 201 Daegudae-ro, Jillyang, Gyeongsan, Gyeongbuk, 38453, Republic of Korea
| | - Seul-Gi Yang
- Department of Biotechnology, College of Engineering, Daegu University, 201 Daegudae-ro, Jillyang, Gyeongsan, Gyeongbuk, 38453, Republic of Korea
| | - Min-Ji Kim
- Department of Biotechnology, College of Engineering, Daegu University, 201 Daegudae-ro, Jillyang, Gyeongsan, Gyeongbuk, 38453, Republic of Korea
| | - In-Su Kim
- Department of Biotechnology, College of Engineering, Daegu University, 201 Daegudae-ro, Jillyang, Gyeongsan, Gyeongbuk, 38453, Republic of Korea
| | - Ho-Geun Jegal
- Department of Biotechnology, College of Engineering, Daegu University, 201 Daegudae-ro, Jillyang, Gyeongsan, Gyeongbuk, 38453, Republic of Korea
| | - Gabbine Wee
- Laboratory Animal Center, Daegu-Gyeongbuk Medical Innovation Foundation (DGMIF), 80 Cheombok-ro, Dong-gu, Daegu, 41061, Republic of Korea
| | - Hee-Young Yang
- Laboratory Animal Center, Daegu-Gyeongbuk Medical Innovation Foundation (DGMIF), 80 Cheombok-ro, Dong-gu, Daegu, 41061, Republic of Korea
| | - Joung Jun Park
- Animal Reproduction & Biotechnology Center, Myung-Poom Hanwoo Consulting, Hoengseong, 25232, Republic of Korea
| | - Young-Kug Choo
- Department of Biological Science, College of Natural Sciences, Wonkwang University, 460, Iksandae-ro, Iksan, Jeonbuk, 54538, Republic of Korea
| | - Deog-Bon Koo
- Department of Biotechnology, College of Engineering, Daegu University, 201 Daegudae-ro, Jillyang, Gyeongsan, Gyeongbuk, 38453, Republic of Korea.
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5
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Park JB, Park CS, Choi YJ, Kwak S, Moon I, Hwang IC, Park JJ, Lee SP, Park JH, Cho GY. P785 Left ventricular geometry and myocardial contractility modulate impact of statins on prognosis in patients with acute heart failure. Eur Heart J Cardiovasc Imaging 2020. [DOI: 10.1093/ehjci/jez319.444] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Abstract
Funding Acknowledgements
N/A
Background/Introduction: The benefit of statins in patients with heart failure (HF) remains controversial and the mechanism of action is largely speculative. We investigated whether survival benefit with statins differs according to left ventricular (LV) geometry and myocardial contractility in acute HF patients.
Methods
We enrolled 1792 acute HF patients receiving statins and 2296 patients not receiving statins admitted from 2009 to 2016. The LV and right ventricular (RV) global longitudinal strain (GLS) was assessed as a measure of myocardial contractility. Patients were classified into 2 groups based on ischemic etiology of HF and further divided into 4 subgroups according to the median values of LV-GLS or RV-GLS. The primary outcome was 5-year all-cause mortality. The study protocol was approved by the ethics committee at each institute and complied with the Declaration of Helsinki. The need for written informed consent was waived.
Results
During the 5-year follow-up, 1740 (40.4%) patients died and they had more unfavorable baseline characteristics. Statin therapy was significantly associated with improved survival in overall patients and in both groups with and without ischemic etiology (all p <0.001). Patients with concentric remodeling/hypertrophy and eccentric hypertrophy demonstrated survival benefit with statin therapy (P = 0.033, 0.004, and 0.008, respectively), while those with normal geometry did not (p = 0.123). In the non-ischemic HF group, survival benefit with statin therapy was confined to patients with low LV-GLS (p = 0.045) or those with low RV-GLS p = 0.003). On the contrary, in ischemic HF group, survival benefit with statin therapy was observed in all patients regardless of the values of LV-GLS or RV-GLS. Significant interactions were present between statin use and diabetes mellitus and IHD (p for interaction = 0.027 and 0.003, respectively) regarding mortality.
Conclusions
LV geometry and myocardial contractility may modulate the effects of statins in patients with acute HF. These echocardiographic measures can provide prognostic information to guide tailored statin treatment in this population. Our findings may also help to develop more well-designed prospective studies, in terms of a more homogenous study population, to confirm survival benefit with statin therapy.
Abstract P785 Figure. Multivariate Cox survival curves
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Affiliation(s)
- J B Park
- Seoul National University Hospital, Seoul, Korea (Republic of)
| | - C S Park
- Korea Advanced Institute of Science and Technology, Daejeon, Korea (Republic of)
| | - Y J Choi
- Seoul National University Hospital, Seoul, Korea (Republic of)
| | - S Kwak
- Seoul National University Hospital, Seoul, Korea (Republic of)
| | - I Moon
- Seoul National University Hospital, Seoul, Korea (Republic of)
| | - I C Hwang
- Seoul National University Bundang Hospital, Seongnam, Korea (Republic of)
| | - J J Park
- Seoul National University Bundang Hospital, Seongnam, Korea (Republic of)
| | - S P Lee
- Seoul National University Hospital, Seoul, Korea (Republic of)
| | - J H Park
- Chungnam National University Hospital, Daejeon, Korea (Republic of)
| | - G Y Cho
- Seoul National University Bundang Hospital, Seongnam, Korea (Republic of)
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6
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Rojas MA, Kochar K, Park JJ, Marecik S. Anovaginal fistula repair with sphincteroplasty and levatorplasty - a video vignette. Colorectal Dis 2019; 21:1100-1101. [PMID: 31077536 DOI: 10.1111/codi.14687] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/01/2019] [Accepted: 04/08/2019] [Indexed: 02/08/2023]
Affiliation(s)
- M A Rojas
- Metropolitan Group Hospitals Residency in General Surgery, University of Illinois, Chicago, Illinois, USA
| | - K Kochar
- Division of Colon and Rectal Surgery, Advocate Lutheran General Hospital, Park Ridge, Illinois, USA
| | - J J Park
- Division of Colon and Rectal Surgery, Advocate Lutheran General Hospital, Park Ridge, Illinois, USA
| | - S Marecik
- Division of Colon and Rectal Surgery, Advocate Lutheran General Hospital, Park Ridge, Illinois, USA.,Division of Colon and Rectal Surgery, University of Illinois at Chicago, Chicago, Illinois, USA
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7
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Roh HG, Kim EY, Kim IS, Lee HJ, Park JJ, Lee SB, Choi JW, Jeon YS, Park M, Kim SU, Kim HJ. A Novel Collateral Imaging Method Derived from Time-Resolved Dynamic Contrast-Enhanced MR Angiography in Acute Ischemic Stroke: A Pilot Study. AJNR Am J Neuroradiol 2019; 40:946-953. [PMID: 31097431 DOI: 10.3174/ajnr.a6068] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2019] [Accepted: 04/12/2019] [Indexed: 11/07/2022]
Abstract
BACKGROUND AND PURPOSE Assessment of the collateral status has been emphasized for appropriate treatment decisions in patients with acute ischemic stroke. The purpose of this study was to introduce a multiphase MRA collateral imaging method (collateral map) derived from time-resolved dynamic contrast-enhanced MRA and to verify the value of the multiphase MRA collateral map in acute ischemic stroke by comparing it with the multiphase collateral imaging method (MRP collateral map) derived from dynamic susceptibility contrast-enhanced MR perfusion. MATERIALS AND METHODS From a prospectively maintained registry of acute ischemic stroke, MR imaging data of patients with acute ischemic stroke caused by steno-occlusive lesions of the unilateral ICA and/or the M1 segment of the MCA were analyzed. We generated collateral maps using dynamic signals from dynamic contrast-enhanced MRA and DSC-MRP using a Matlab-based in-house program and graded the collateral scores of the multiphase MRA collateral map and the MRP collateral map independently. Interobserver reliabilities and intermethod agreement between both collateral maps for collateral grading were tested. RESULTS Seventy-one paired multiphase MRA and MRP collateral maps from 67 patients were analyzed. The interobserver reliabilities for collateral grading using multiphase MRA or MRP collateral maps were excellent (weighted κ = 0.964 and 0.956, respectively). The agreement between both collateral maps was also excellent (weighted κ = 0.884; 95% confidence interval, 0.819-0.949). CONCLUSIONS We demonstrated that the dynamic signals of dynamic contrast-enhanced MRA could be used to generate multiphase collateral images and showed the possibility of the multiphase MRA collateral map as a useful collateral imaging method in acute ischemic stroke.
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Affiliation(s)
- H G Roh
- From the Departments of Radiology (H.G.R., J.W.C.)
| | - E Y Kim
- Department of Radiology (E.Y.K.), Gachon University Gil Medical Center, Incheon, Korea
| | - I S Kim
- Siemens Healthineers Ltd (I.S.K.), Seoul, Korea
| | - H J Lee
- Departments of Neurosurgery (H.J.L., S.U.K.)
| | | | | | - J W Choi
- From the Departments of Radiology (H.G.R., J.W.C.)
| | - Y S Jeon
- Neurosurgery (Y.S.J.), Konkuk University Medical Center, Konkuk University School of Medicine, Seoul, Korea
| | - M Park
- Department of Radiology (M.P.), Gangnam Severance Hospital, Yonsei University College of Medicine, Seoul, Korea
| | - S U Kim
- Departments of Neurosurgery (H.J.L., S.U.K.)
| | - H J Kim
- Radiology (H.J.K.), Daejeon St. Mary's Hospital, The Catholic University of Korea, Daejeon, Korea
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8
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Cho MS, Yun JE, Park JJ, Kim YJ, Lee J, Park DW, Nam GB. P1002Clinical Efficacy and Safety of Standard-Dose and Low-Dose Non-Vitamin K Antagonist Oral Anticoagulants in Asian Patients with Non-Valvular Atrial Fibrillation: Results from a Nationwide Cohort Study. Eur Heart J 2018. [DOI: 10.1093/eurheartj/ehy564.p1002] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- M S Cho
- Asan Medical Center, Heart institute, Seoul, Korea Republic of
| | - J E Yun
- National Evidence-based Healthcare Collaborating Agency, Division for Healthcare Technology Assessment Research, Seoul, Korea Republic of
| | - J J Park
- National Evidence-based Healthcare Collaborating Agency, Division for Healthcare Technology Assessment Research, Seoul, Korea Republic of
| | - Y J Kim
- National Evidence-based Healthcare Collaborating Agency, Division for Healthcare Technology Assessment Research, Seoul, Korea Republic of
| | - J Lee
- National Evidence-based Healthcare Collaborating Agency, Division for Healthcare Technology Assessment Research, Seoul, Korea Republic of
| | - D W Park
- Asan Medical Center, Heart institute, Seoul, Korea Republic of
| | - G B Nam
- Asan Medical Center, Heart institute, Seoul, Korea Republic of
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9
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Akiyama E, Cinotti R, Cohen-Solal A, Lassus J, Miro O, Maggioni AP, Mueller C, Parenica J, Park JJ, Spinar J, Zhang Y, Tamura K, Kimura K, Gayat E, Mebazaa A. P3436The J-curve relationship between admission glucose level and 1-year mortality in patients with acute heart failure: results from an international observational cohort. Eur Heart J 2018. [DOI: 10.1093/eurheartj/ehy563.p3436] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Affiliation(s)
| | - R Cinotti
- University Hospital of Nantes, Nantes, France
| | | | - J Lassus
- Helsinki University Central Hospital, Helsinki, Finland
| | - O Miro
- University of Barcelona, Barcelona, Spain
| | - A P Maggioni
- Associazione Nazionale Medici Cardiologi Ospedalieri Research Center, Florence, Italy
| | - C Mueller
- University Hospital Basel, Basel, Switzerland
| | - J Parenica
- Masaryk University, Brno, Czech Republic
| | - J J Park
- Seoul National University Hospital, Seoul, Korea Republic of
| | - J Spinar
- Masaryk University, Brno, Czech Republic
| | - Y Zhang
- Fuwai Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China People's Republic of
| | - K Tamura
- Yokohama City University, Yokohama, Japan
| | - K Kimura
- Yokohama City University Medical Center, Yokohama, Japan
| | - E Gayat
- Hospital Lariboisiere, Paris, France
| | - A Mebazaa
- Hospital Lariboisiere, Paris, France
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10
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Lee JH, Cho YJ, Park JJ, Oh IY, Choi DJ. P888Prognostic implication of ventricular conduction disturbance pattern in hospitalized patients with acute heart failure syndrome. Europace 2018. [DOI: 10.1093/europace/euy015.490] [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)
- J H Lee
- Seoul National University Bundang Hospital, Cardiovascular center, Seongnam, Korea Republic of
| | - Y J Cho
- Seoul National University Bundang Hospital, Cardiovascular center, Seongnam, Korea Republic of
| | - J J Park
- Seoul National University Bundang Hospital, Cardiovascular center, Seongnam, Korea Republic of
| | - I Y Oh
- Seoul National University Bundang Hospital, Cardiovascular center, Seongnam, Korea Republic of
| | - D J Choi
- Seoul National University Bundang Hospital, Cardiovascular center, Seongnam, Korea Republic of
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11
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Tan SY, Strazzulla LC, Li X, Park JJ, Lee SJ, Kim CC. Association of clinicopathological features of melanoma with total naevus count and a history of dysplastic naevi: a cross-sectional retrospective study within an academic centre. Clin Exp Dermatol 2018; 43:566-572. [PMID: 29450912 DOI: 10.1111/ced.13393] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 07/30/2017] [Indexed: 01/02/2023]
Abstract
BACKGROUND High naevus count (HNC) (≥ 50 naevi) and presence of dysplastic naevi (DN) are risk factors for malignant melanoma (MM); however, MMs also occur in patients with low naevus count (LNC) (< 50 naevi) and in patients without DN. Little is known about differences between MMs in these groups. AIM To characterize the clinicopathological differences between MMs in patients with HNC and those in patients with LNC, with or without biopsy-proven DN. METHODS This was a cross-sectional retrospective chart review of 281 patients with MM seen between April 2013 and March 2014 at an academic pigmented lesion clinic (Boston, MA, USA). RESULTS Patients with LNC MMs were diagnosed at an older age (51 vs. 41 years, P < 0.001, OR = 0.95, 95% CI 0.93-0.97), with more aggressive MM features, including greater Breslow thickness (1.1 vs. 0.8 mm, P = 0.01), more mitoses (2 vs. 1 mitoses/mm2 , P < 0.001), lower rate of superficial spreading subtype (58 vs. 78%, P < 0.01, OR = 2.57, 95% CI 1.31-5.03) and higher MM stage (P < 0.001), compared to patients with HNC. Patients with DN had similar trends as those in patients with HNC described above, and in addition, were more likely to have a truncal MM (55 vs. 39%, P < 0.01, OR = 1.97, 95% CI 1.22-3.18) with less ulceration (13 vs. 29%, P < 0.01, OR = 0.36, 95% CI 0.19-0.71). Patients without DN were more likely to have a history of a non-MM skin cancer (32 vs. 19%, P = 0.01, OR = 0.49, 95% CI 0.28-0.85) and an amelanotic MM (33 vs 21%, P = 0.03, OR = 0.55, 95% CI 0.31-0.96). CONCLUSIONS Patients with LNC may develop MMs with more aggressive features at an older age than patients with HNC. A history of biopsy-proven DN reveals distinct MM differences compared to patients without DN.
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Affiliation(s)
- S Y Tan
- Harvard Medical School, Boston, MA, USA
| | - L C Strazzulla
- New York University School of Medicine, New York, NY, USA
| | - X Li
- Department of Biostatistics and Computational Biology, Dana-Farber Cancer Institute, Boston, MA, USA.,Harvard School of Public Health, Boston, MA, USA
| | - J J Park
- Department of Dermatology, Stony Brook School of Medicine, New York, NY, USA
| | - S J Lee
- Harvard Medical School, Boston, MA, USA.,Department of Biostatistics and Computational Biology, Dana-Farber Cancer Institute, Boston, MA, USA
| | - C C Kim
- Pigmented Lesion Clinic and Cutaneous Oncology Program, Department of Dermatology, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA, USA
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12
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Park HJ, Park JY, Kim JW, Yang SG, Jung JM, Kim MJ, Park JJ, Koo DB. Regulation of the Endoplasmic Reticulum Stress by BIP/GRP78 is involved in Meiotic Maturation of Porcine Oocytes In Vitro. Dev Reprod 2017; 21:407-415. [PMID: 29354786 PMCID: PMC5769134 DOI: 10.12717/dr.2017.21.4.407] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2017] [Revised: 11/17/2017] [Accepted: 12/04/2017] [Indexed: 11/17/2022]
Abstract
In the present study, we investigated the role of binding immunoglobulin protein/glucose-regulated protein, 78-kDa (BIP/GRP78)-regulated endoplasmic reticulum (ER)-stress on meiotic maturation and cumulus cells expansion in porcine cumulus-oocyte complexes (COCs). Previously, it has been demonstrated that unfolded protein response (UPR)-related genes, such as molecules involved in ER-stress defense mechanisms, were expressed in matured oocytes and cumulus cells during in vitro maturation (IVM) of porcine oocytes. However, BIP/GRP78-mediated regulation of ER stress in porcine oocytes has not been reported. Firstly, we observed the effects of knockdown of BIP/GRP78 (an UPR initiation marker) using porcine-specific siRNAs (#909, #693, and #1570) on oocyte maturation. Among all siRNAs, siRNA #693 significantly reduced the protein levels of UPR marker proteins (BIP/GRP78, ATF4, and P90ATF6) in porcine COCs observed by Western blotting and immunofluorescence analysis. We also observed that the reduction of BIP/GRP78 levels by siRNA#693 significantly inhibited the meiotic maturation of oocytes (siRNA #693: 32.5±10.1% vs control: 77.8±5.3%). In addition, we also checked the effect of ER-stress inhibitors, tauroursodeoxycholic acid (TUDCA, 200 μM) and melatonin (0.1 μM), in BIP/ GRP78-knockdown oocytes. TUDCA and melatonin treatment could restore the expression levels of ER-stress marker proteins (BIP/GRP78, p-eIF2α, eIF2α, ATF4, and P90ATF6) in siRNA #693-transfected matured COCs. In conclusion, these results demonstrated that BIP/GRP78-mediated regulation of UPR signaling and ER stress plays an important role in in vitro maturation of porcine oocytes.
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Affiliation(s)
- Hyo-Jin Park
- Dept. of Biotechnology, College of Engineering, Daegu University, Gyeongsan 38453, Republic of Korea
| | - Jae-Young Park
- Dept. of Biotechnology, College of Engineering, Daegu University, Gyeongsan 38453, Republic of Korea.,Saewha Hospital, Dongnae, Busan 47822, Republic of Korea
| | - Jin-Woo Kim
- Dept. of Biotechnology, College of Engineering, Daegu University, Gyeongsan 38453, Republic of Korea
| | - Seul-Gi Yang
- Dept. of Biotechnology, College of Engineering, Daegu University, Gyeongsan 38453, Republic of Korea
| | - Jae-Min Jung
- Dept. of Biotechnology, College of Engineering, Daegu University, Gyeongsan 38453, Republic of Korea
| | - Min-Ji Kim
- Dept. of Biotechnology, College of Engineering, Daegu University, Gyeongsan 38453, Republic of Korea
| | - Joung Jun Park
- Animal Reproduction & Biotechnology Center, Myung-Poom Hanwoo Consulting, Gangwon 25232, Republic of Korea
| | - Deog-Bon Koo
- Dept. of Biotechnology, College of Engineering, Daegu University, Gyeongsan 38453, Republic of Korea
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13
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Menzies AM, Johnson DB, Ramanujam S, Atkinson VG, Wong ANM, Park JJ, McQuade JL, Shoushtari AN, Tsai KK, Eroglu Z, Klein O, Hassel JC, Sosman JA, Guminski A, Sullivan RJ, Ribas A, Carlino MS, Davies MA, Sandhu SK, Long GV. Anti-PD-1 therapy in patients with advanced melanoma and preexisting autoimmune disorders or major toxicity with ipilimumab. Ann Oncol 2017; 28:368-376. [PMID: 27687304 DOI: 10.1093/annonc/mdw443] [Citation(s) in RCA: 566] [Impact Index Per Article: 80.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
Background Anti-PD-1 antibodies (anti-PD-1) have clinical activity in a number of malignancies. All clinical trials have excluded patients with significant preexisting autoimmune disorders (ADs) and only one has included patients with immune-related adverse events (irAEs) with ipilimumab. We sought to explore the safety and efficacy of anti-PD-1 in such patients. Patients and methods Patients with advanced melanoma and preexisting ADs and/or major immune-related adverse events (irAEs) with ipilimumab (requiring systemic immunosuppression) that were treated with anti-PD-1 between 1 July 2012 and 30 September 2015 were retrospectively identified. Results One hundred and nineteen patients from 13 academic tertiary referral centers were treated with anti-PD-1. In patients with preexisting AD (N = 52), the response rate was 33%. 20 (38%) patients had a flare of AD requiring immunosuppression, including 7/13 with rheumatoid arthritis, 3/3 with polymyalgia rheumatica, 2/2 with Sjogren's syndrome, 2/2 with immune thrombocytopaenic purpura and 3/8 with psoriasis. No patients with gastrointestinal (N = 6) or neurological disorders (N = 5) flared. Only 2 (4%) patients discontinued treatment due to flare, but 15 (29%) developed other irAEs and 4 (8%) discontinued treatment. In patients with prior ipilimumab irAEs requiring immunosuppression (N = 67) the response rate was 40%. Two (3%) patients had a recurrence of the same ipilimumab irAEs, but 23 (34%) developed new irAEs (14, 21% grade 3-4) and 8 (12%) discontinued treatment. There were no treatment-related deaths. Conclusions In melanoma patients with preexisting ADs or major irAEs with ipilimumab, anti-PD-1 induced relatively frequent immune toxicities, but these were often mild, easily managed and did not necessitate discontinuation of therapy, and a significant proportion of patients achieved clinical responses. The results support that anti-PD-1 can be administered safely and can achieve clinical benefit in patients with preexisting ADs or prior major irAEs with ipilimumab.
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Affiliation(s)
- A M Menzies
- Melanoma Institute Australia and The University of Sydney, Sydney, Australia.,Royal North Shore and Mater Hospitals, Sydney, Australia
| | - D B Johnson
- Vanderbilt University Medical Center, Nashville, USA
| | - S Ramanujam
- Melanoma Institute Australia and The University of Sydney, Sydney, Australia
| | - V G Atkinson
- Princess Alexandra Hospital, Greenslopes Hospital and University of Queensland, Brisbane, Australia
| | - A N M Wong
- Peter MacCallum Cancer Centre, Melbourne, Australia
| | - J J Park
- Crown Princess Mary Cancer Centre Westmead, Sydney, Australia
| | - J L McQuade
- The University of Texas MD Anderson Cancer Center, Houston, USA
| | | | - K K Tsai
- Department of Medical Oncology, University of California San Francisco, San Francisco, USA
| | - Z Eroglu
- Department of Medical Oncology, Moffitt Cancer Centre, Tampa, USA
| | - O Klein
- Department of Medical Oncology, Olivia Newton-John Cancer Centre & Cancer Research Institute, Austin Health, Melbourne, Australia
| | - J C Hassel
- Department of Dermatology, Heidelberg University, Heidelberg, Germany
| | - J A Sosman
- Vanderbilt University Medical Center, Nashville, USA
| | - A Guminski
- Melanoma Institute Australia and The University of Sydney, Sydney, Australia.,Royal North Shore and Mater Hospitals, Sydney, Australia
| | - R J Sullivan
- Massachusetts General Hospital Cancer Center, Boston, USA
| | - A Ribas
- Division of Hematology-Oncology, University of California Los Angeles, Los Angeles, USA
| | - M S Carlino
- Melanoma Institute Australia and The University of Sydney, Sydney, Australia.,Crown Princess Mary Cancer Centre Westmead, Sydney, Australia
| | - M A Davies
- The University of Texas MD Anderson Cancer Center, Houston, USA
| | - S K Sandhu
- Peter MacCallum Cancer Centre, Melbourne, Australia
| | - G V Long
- Melanoma Institute Australia and The University of Sydney, Sydney, Australia.,Royal North Shore and Mater Hospitals, Sydney, Australia
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14
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Eftaiha SM, Balachandran B, Marecik SJ, Mellgren A, Nordenstam J, Melich G, Prasad LM, Park JJ. Sacral nerve stimulation can be an effective treatment for low anterior resection syndrome. Colorectal Dis 2017; 19:927-933. [PMID: 28477435 DOI: 10.1111/codi.13701] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/27/2016] [Accepted: 02/05/2017] [Indexed: 02/08/2023]
Abstract
AIM Sacral nerve stimulation has become a preferred method for the treatment of faecal incontinence in patients who fail conservative (non-operative) therapy. In previous small studies, sacral nerve stimulation has demonstrated improvement of faecal incontinence and quality of life in a majority of patients with low anterior resection syndrome. We evaluated the efficacy of sacral nerve stimulation in the treatment of low anterior resection syndrome using a recently developed and validated low anterior resection syndrome instrument to quantify symptoms. METHOD A retrospective review of consecutive patients undergoing sacral nerve stimulation for the treatment of low anterior resection syndrome was performed. Procedures took place in the Division of Colon and Rectal Surgery at two academic tertiary medical centres. Pre- and post-treatment Cleveland Clinic Incontinence Scores and Low Anterior Resection Syndrome scores were assessed. RESULTS Twelve patients (50% men) suffering from low anterior resection syndrome with a mean age of 67.8 (±10.8) years underwent sacral nerve test stimulation. Ten patients (83%) proceeded to permanent implantation. Median time from anterior resection to stimulator implant was 16 (range 5-108) months. At a median follow-up of 19.5 (range 4-42) months, there were significant improvements in Cleveland Clinic Incontinence Scores and Low Anterior Resection Syndrome scores (P < 0.001). CONCLUSION Sacral nerve stimulation improved symptoms in patients suffering from low anterior resection syndrome and may therefore be a viable treatment option.
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Affiliation(s)
- S M Eftaiha
- Division of Colon and Rectal Surgery, University of Illinois, Chicago, Illinois, USA
| | - B Balachandran
- Chicago Medical School, Rosalind Franklin University of Medicine and Science, North Chicago, Illinois, USA
| | - S J Marecik
- Division of Colon and Rectal Surgery, University of Illinois, Chicago, Illinois, USA.,Chicago Medical School, Rosalind Franklin University of Medicine and Science, North Chicago, Illinois, USA.,Division of Colon and Rectal Surgery, Advocate Lutheran General Hospital, Park Ridge, Illinois, USA
| | - A Mellgren
- Division of Colon and Rectal Surgery, University of Illinois, Chicago, Illinois, USA
| | - J Nordenstam
- Division of Colon and Rectal Surgery, University of Illinois, Chicago, Illinois, USA
| | - G Melich
- Department of General Surgery, Royal Columbian Hospital, University of British Columbia, New Westminster, BC, Canada
| | - L M Prasad
- Division of Colon and Rectal Surgery, University of Illinois, Chicago, Illinois, USA.,Division of Colon and Rectal Surgery, Advocate Lutheran General Hospital, Park Ridge, Illinois, USA
| | - J J Park
- Chicago Medical School, Rosalind Franklin University of Medicine and Science, North Chicago, Illinois, USA.,Division of Colon and Rectal Surgery, Advocate Lutheran General Hospital, Park Ridge, Illinois, USA
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15
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Balachandran B, Melich G, Mustafa T, Marecik SJ, Prasad LM, Gonzalez M, Sulo S, Dabbous F, Park JJ. Prospective analysis of the sealing ability of the ENSEAL ® G2 Articulating Tissue Sealer and transector on human mesenteric vessels in colorectal surgery. Tech Coloproctol 2017; 21:133-138. [PMID: 28144764 DOI: 10.1007/s10151-017-1584-1] [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] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/12/2016] [Accepted: 12/18/2016] [Indexed: 12/30/2022]
Abstract
BACKGROUND The sealing and transection of mesenteric vessels is a crucial step in minimally invasive colorectal surgery. We examined the sealing quality of the ENSEAL® G2 Articulating Tissue Sealer in three different articulations in mesenteric vessels. METHODS This was a prospective experimental study within a tertiary healthcare center, and 30 patients were recruited. Burst pressures for each specimen were measured as the primary outcome. Ten specimens at each of the three articulations were also histologically assessed for the quality of seal. RESULTS We evaluated 54 sets of specimens from 30 patients for bursting pressure, all of which were harvested and sealed in the operating room. No statistical difference was seen in burst pressures from seals recorded at no angulation, half-maximal angulation, or maximal angulation (1604, 1507, 1478 mmHg; p = 0.07). Histological analysis showed no statistical differences in the average vessel diameter (p = 0.57), lateral extent of thermal injury (p = 0.48), degree of vascular sclerosis, or the integrity of seal at the three articulations. No cases of intraoperative or postoperative bleeding were observed in any of the patients. Five (16.7%) of the ENSEAL® devices developed breaks in the black, heat-shrink, polyethylene covering as a result of repeated articulation and disarticulation. Electrical arcing did not appear to have occurred as a result of the break, although this was not formally examined. CONCLUSIONS The maximum sustainable pressure in mesenteric vessels sealed with a bipolar electrothermal device is supraphysiological, and consequently, the device can be safely used at various articulations to seal vessels during colorectal surgery.
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Affiliation(s)
- B Balachandran
- Division of Colon and Rectal Surgery, Advocate Lutheran General Hospital, 1775 Dempster Street, Park Ridge, IL, 60068, USA
| | - G Melich
- Department of Surgery, Royal Columbian Hospital, University of British Columbia, New Westminster, BC, Canada
| | - T Mustafa
- Division of Colon and Rectal Surgery, Advocate Lutheran General Hospital, 1775 Dempster Street, Park Ridge, IL, 60068, USA
| | - S J Marecik
- Division of Colon and Rectal Surgery, Advocate Lutheran General Hospital, 1775 Dempster Street, Park Ridge, IL, 60068, USA
| | - L M Prasad
- Division of Colon and Rectal Surgery, Advocate Lutheran General Hospital, 1775 Dempster Street, Park Ridge, IL, 60068, USA
| | - M Gonzalez
- Division of Pathology, Advocate Lutheran General Hospital, Park Ridge, IL, USA
| | - S Sulo
- James R. & Helen D. Russell Institute for Research & Innovation, Advocate Lutheran General Hospital, Park Ridge, IL, USA
| | - F Dabbous
- James R. & Helen D. Russell Institute for Research & Innovation, Advocate Lutheran General Hospital, Park Ridge, IL, USA
| | - J J Park
- Division of Colon and Rectal Surgery, Advocate Lutheran General Hospital, 1775 Dempster Street, Park Ridge, IL, 60068, USA.
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16
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Oh Y, Lee J, Kim HC, Hahn TW, Yoon BI, Han JH, Kwon YS, Park JJ, Koo DB, Rhee KJ, Jung BD. Establishment of hydrochloric acid/lipopolysaccharide-induced pelvic inflammatory disease model. J Vet Sci 2016; 17:413-9. [PMID: 26726020 PMCID: PMC5037311 DOI: 10.4142/jvs.2016.17.3.413] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2015] [Revised: 12/15/2015] [Accepted: 12/30/2015] [Indexed: 01/06/2023] Open
Abstract
Pelvic inflammatory disease (PID), which is one of the most problematic complications experienced by women with sexually transmitted diseases, frequently causes secondary infections after reproductive abnormalities in veterinary animals. Although the uterus is self-protective, it becomes fragile during periods or pregnancy. To investigate PID, bacteria or lipopolysaccharide (LPS) extracted from gram negative bacteria has been used to induce the disease in several animal models. However, when LPS is applied to the peritoneum, it often causes systemic sepsis leading to death and the PID was not consistently demonstrated. Hydrochloric acid (HCl) has been used to induce inflammation in the lungs and stomach but not tested for reproductive organs. In this study, we developed a PID model in mice by HCl and LPS sequential intracervical (i.c.) administration. The proinflammatory cytokines, interleukin (IL)-1β, IL-6 and tumor necrosis factor-α, were detected in the mouse uterus by western blot analysis and cytokine enzyme-linked immunosorbent assay after HCl (25 mg/kg) administration i.c. followed by four LPS (50 mg/kg) treatments. Moreover, mice exhibited increased infiltration of neutrophils in the endometrium and epithelial layer. These results suggest that ic co-administration of HCl and LPS induces PID in mice. This new model may provide a consistent and reproducible PID model for future research.
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Affiliation(s)
- Yeonsu Oh
- College of Veterinary Medicine & Institute of Veterinary Science, Kangwon National University, Chuncheon 24341, Korea
| | - Jaehun Lee
- College of Veterinary Medicine & Institute of Veterinary Science, Kangwon National University, Chuncheon 24341, Korea
| | - Hyeon-Cheol Kim
- College of Veterinary Medicine & Institute of Veterinary Science, Kangwon National University, Chuncheon 24341, Korea
| | - Tae-Wook Hahn
- College of Veterinary Medicine & Institute of Veterinary Science, Kangwon National University, Chuncheon 24341, Korea
| | - Byung-Il Yoon
- College of Veterinary Medicine & Institute of Veterinary Science, Kangwon National University, Chuncheon 24341, Korea
| | - Jeong-Hee Han
- College of Veterinary Medicine & Institute of Veterinary Science, Kangwon National University, Chuncheon 24341, Korea
| | - Yong-Soo Kwon
- College of Pharmacy, Kangwon National University, Chuncheon 24341, Korea
| | - Joung Jun Park
- Animal Reproduction & Biotechnology Center, Myung-Poom Hanwoo Consulting, Hoengseong 25218, Korea
| | - Deog-Bon Koo
- Department of Biotechnology, College of Engineering, Daegu University, Gyeongsan 38453, Korea
| | - Ki-Jong Rhee
- Department of Biomedical Laboratory Science, College of Health Sciences, Yonsei University, Wonju 26493, Korea
| | - Bae Dong Jung
- College of Veterinary Medicine & Institute of Veterinary Science, Kangwon National University, Chuncheon 24341, Korea
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17
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Rhee K, Kim JH, Jung DH, Han JW, Lee YC, Lee SK, Shin SK, Park JC, Chung HS, Park JJ, Youn YH, Park H. Self-expandable metal stents for malignant esophageal obstruction: a comparative study between extrinsic and intrinsic compression. Dis Esophagus 2016; 29:224-8. [PMID: 25708695 DOI: 10.1111/dote.12325] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Self-expandable metal stents (SEMSs) are effective for malignant esophageal obstruction, but usefulness of SEMSs in extrinsic lesions is yet to be elucidated. This study is aimed at evaluating the clinical usefulness of SEMSs in the extrinsic compression compared with intrinsic. A retrospective review was conducted for 105 patients (intrinsic, 85; extrinsic, 20) with malignant esophageal obstruction who underwent endoscopic SEMSs placement. Technical and clinical success rates were evaluated and clinical outcomes were compared between extrinsic and intrinsic group. Extrinsic group was mostly pulmonary origin. Overall technical and clinical success rate was 100% and 91%, respectively, without immediate complications. Extrinsic and intrinsic group did not differ significantly in clinical success rate. The median stent patency time was 131.3 ± 85.8 days in intrinsic group while that of extrinsic was 54.6 ± 45.1 due to shorter survival after stent insertion. The 4-, 8-, and 12-week patency rates were 90.5%, 78.8%, and 64.9% respectively in intrinsic group, while stents of extrinsic group remained patent until death. Uncovered, fully covered, and double-layered stent were used evenly and the types did not influence patency in both groups. In conclusion, esophageal SEMSs can safely and effectively be used for malignant extrinsic compression as well as intrinsic.
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Affiliation(s)
- K Rhee
- Department of Internal Medicine, Yonsei University College of Medicine, Seoul, Korea.,Gangnam Severance Hospital, Yonsei University College of Medicine, Seoul, Korea
| | - J-H Kim
- Department of Internal Medicine, Yonsei University College of Medicine, Seoul, Korea.,Gangnam Severance Hospital, Yonsei University College of Medicine, Seoul, Korea
| | - D H Jung
- Department of Internal Medicine, Yonsei University College of Medicine, Seoul, Korea
| | - J W Han
- Department of Internal Medicine, Yonsei University College of Medicine, Seoul, Korea.,Gangnam Severance Hospital, Yonsei University College of Medicine, Seoul, Korea
| | - Y C Lee
- Department of Internal Medicine, Yonsei University College of Medicine, Seoul, Korea
| | - S K Lee
- Department of Internal Medicine, Yonsei University College of Medicine, Seoul, Korea
| | - S K Shin
- Department of Internal Medicine, Yonsei University College of Medicine, Seoul, Korea
| | - J C Park
- Department of Internal Medicine, Yonsei University College of Medicine, Seoul, Korea
| | - H S Chung
- Department of Internal Medicine, Yonsei University College of Medicine, Seoul, Korea
| | - J J Park
- Department of Internal Medicine, Yonsei University College of Medicine, Seoul, Korea.,Gangnam Severance Hospital, Yonsei University College of Medicine, Seoul, Korea
| | - Y H Youn
- Department of Internal Medicine, Yonsei University College of Medicine, Seoul, Korea.,Gangnam Severance Hospital, Yonsei University College of Medicine, Seoul, Korea
| | - H Park
- Department of Internal Medicine, Yonsei University College of Medicine, Seoul, Korea.,Gangnam Severance Hospital, Yonsei University College of Medicine, Seoul, Korea
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18
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Kim JW, Park HJ, Chae SK, Ahn JH, DO GY, Choo YK, Park JJ, Jung BD, Kim SU, Chang KT, Koo DB. Ganglioside GD1a promotes oocyte maturation, furthers preimplantation development, and increases blastocyst quality in pigs. J Reprod Dev 2016; 62:249-55. [PMID: 26860251 PMCID: PMC4919288 DOI: 10.1262/jrd.2015-083] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [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] [Indexed: 11/20/2022] Open
Abstract
Gangliosides are key lipid molecules required for the regulation of cellular processes such as
proliferation, differentiation, and cell signaling, including signaling of epidermal growth factor receptor
(EGFR). Epidermal growth factor (EGF) has long been considered a potential regulator of meiotic and
cytoplasmic maturation in mammalian oocytes. However, there is no report on the direct effect of ganglioside
GD1a in porcine oocyte maturation. In this study, we first investigated a functional link between GD1a and
meiotic maturation during in vitro maturation (IVM) of porcine embryos. Moreover, we
confirmed the effect of exogenous GD1a treatment on blastocyst development, quality, and fertilization rate in
early embryonic development. First, we observed that the protein level of ST3GAL2, a GD1a synthesizing enzyme,
significantly increased (P < 0.01) in cumulus-oocyte-complexes (COCs) during IVM progress. The proportion
of arrested germinal vesicles (GV) increased in oocytes treated with EGF+GD1a (41.6 ± 1.5%) at the IVM I
stage. Upon completion of meiotic maturation, the proportion of metaphase II (M II) was significantly higher
(P < 0.05) in the EGF+GD1a (89.9 ± 3.6%) treated group. After IVF, the percentage of penetrated oocytes was
significantly higher (P < 0.05) in the EGF+GD1a (89.1 ± 2.3%) treated group than in the control group.
Furthermore, exogenous GD1a treatment improved the developmental competence and quality of blastocysts during
preimplantation embryo development stage. These results suggest that ganglioside GD1a may play an important
role in IVM mechanisms of porcine maturation capacity. Furthermore, our findings will be helpful for better
promoting the embryo development and blastocyst quality in pigs.
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Affiliation(s)
- Jin-Woo Kim
- Department of Biotechnology, College of Engineering, Daegu University, Gyeongbuk 712-714, Republic of Korea
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19
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Kamal T, Pai A, Velchuru VR, Zawadzki M, Park JJ, Marecik SJ, Abcarian H, Prasad LM. Should anastomotic assessment with flexible sigmoidoscopy be routine following laparoscopic restorative left colorectal resection? Colorectal Dis 2015; 17:160-4. [PMID: 25359528 DOI: 10.1111/codi.12809] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/19/2014] [Accepted: 08/15/2014] [Indexed: 02/06/2023]
Abstract
AIM The aim of the study was to evaluate the value of routine intra-operative flexible sigmoidoscopy (IOFS) for left-sided anastomotic integrity and to determine the safest step after a positive leak test. METHOD All consecutive patients undergoing left-sided colorectal resections for benign and malignant disease between August 2005 and April 2011 were included. Data regarding procedure, type of anastomosis and outcomes of IOFS were collected. A positive intra-operative leak test resulted in redoing the anastomosis and repeating the leak test. RESULTS A total of 415 consecutive patients underwent hand-assisted laparoscopic colorectal resection with a colorectal/ileoanal anastomosis. All patients underwent IOFS. Seventeen patients had abnormality on IOFS. Fifteen patients had a positive air leak test. One patient had anastomotic bleeding. There was one stapler misfiring. Fourteen anastomoses were redone without diversion. One patient required diversion to protect the ileoanal anastomosis and another had already been diverted. Minor bleeding from the staple line in one patient resolved without intervention; however, he had a postoperative anastomotic leak needing surgical intervention. None of the patients who had a takedown and refashioning of the anastomosis following a positive leak on IOFS had postoperative anastomotic leakage or bleeding. Our overall anastomotic leak rate was 2.1%. CONCLUSIONS Intra-operative flexible sigmoidoscopy for restorative colorectal resection is safe and reliable and should be performed routinely to assess anastomotic integrity and bleeding. Refashioning the anastomosis after formal takedown would obviate the risk of leakage and is our recommended method of managing intra-operative leaks.
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Affiliation(s)
- T Kamal
- Division of Colon and Rectal Surgery, Advocate Lutheran General Hospital, Park Ridge, Illinois, USA
| | - A Pai
- Division of Colon and Rectal Surgery, Advocate Lutheran General Hospital, Park Ridge, Illinois, USA
| | - V R Velchuru
- Division of Colon and Rectal Surgery, Advocate Lutheran General Hospital, Park Ridge, Illinois, USA
| | - M Zawadzki
- Division of Colon and Rectal Surgery, Advocate Lutheran General Hospital, Park Ridge, Illinois, USA
| | - J J Park
- Division of Colon and Rectal Surgery, Advocate Lutheran General Hospital, Park Ridge, Illinois, USA
| | - S J Marecik
- Division of Colon and Rectal Surgery, Advocate Lutheran General Hospital, Park Ridge, Illinois, USA
| | - H Abcarian
- Department of Colon and Rectal Surgery, University of Illinois, Chicago, Illinois, USA
| | - L M Prasad
- Division of Colon and Rectal Surgery, Advocate Lutheran General Hospital, Park Ridge, Illinois, USA.,Department of Colon and Rectal Surgery, University of Illinois, Chicago, Illinois, USA
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20
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Oh SH, You JH, Lee JY, Park JJ, Shin S. Cost-Utility Analysis Of Carotid Artery Stenting Versus Endarterectomy For Symptomatic Carotid Stenosis Patients. Value Health 2014; 17:A491. [PMID: 27201459 DOI: 10.1016/j.jval.2014.08.1453] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Affiliation(s)
- S H Oh
- National Evidence-based Healthcare Collaborating Agency, Seoul, South Korea
| | - J H You
- National Evidence-based Healthcare Collaborating Agency, Seoul, South Korea
| | - J Y Lee
- National Evidence-based Healthcare Collaborating Agency (NECA), Seoul, South Korea
| | - J J Park
- National Evidence-based Healthcare Collaborating Agency, Seoul, South Korea
| | - S Shin
- National Evidence-based healthcare Collaborating Agency, Seoul, South Korea
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21
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You JH, O H SH, Lee JY, Park JJ, Shin S. The Effectiveness Of Carotid Artery Stenting Compared With Endarterectomy In Symptomatic Patients With Carotid Stenosis In Korean Multi-Center Setting. Value Health 2014; 17:A475. [PMID: 27201371 DOI: 10.1016/j.jval.2014.08.1359] [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] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Affiliation(s)
- J H You
- National Evidence-based Healthcare Collaborating Agency, Seoul, South Korea
| | - S H O H
- National Evidence-based Healthcare Collaborating Agency, Seoul, South Korea
| | - J Y Lee
- National Evidence-based Healthcare Collaborating Agency (NECA), Seoul, South Korea
| | - J J Park
- National Evidence-based Healthcare Collaborating Agency, Seoul, South Korea
| | - S Shin
- National Evidence-based healthcare Collaborating Agency, Seoul, South Korea
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Jang HJ, Kim BC, Kim HS, Kim JH, Song HH, Kim JB, Park JJ, Yoon SN, Woo JY, Zang DY. Comparison of RECIST 1.0 and RECIST 1.1 on computed tomography in patients with metastatic colorectal cancer. Oncology 2014; 86:117-21. [PMID: 24480800 DOI: 10.1159/000357714] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2013] [Accepted: 11/25/2013] [Indexed: 12/22/2022]
Abstract
OBJECTIVE We conducted this study to compare tumor measurement by computed tomography (CT) and tumor response assessment between Response Evaluation Criteria In Solid Tumors (RECIST) 1.0 and RECIST 1.1 in patients with metastatic colorectal cancer (CRC). METHODS We reviewed the medical records of patients with metastatic CRC who received first-line chemotherapy between January 2004 and December 2012 and compared CT tumor measurement using two RECIST versions. RESULTS A total of 58 patients who had target lesions according to RECIST 1.0 were included in the study. The number of target lesions recorded by RECIST 1.1 was significantly lower than that by RECIST 1.0, with a decrease experienced in 48 patients (82.7%). Six patients had no target lesions because of the new criteria of RECIST 1.1 for lymph node size. Out of 95 lymph nodes from 58 patients, only 40% were defined as target lesions according to RECIST 1.1. The overall response rate of first-line chemotherapy according to RECIST 1.0 and 1.1 was 41.5 and 40.4%, respectively. The best tumor responses showed almost perfect agreement between RECIST 1.1 and RECIST 1.0 (ĸ = 0.913). Three patients showed disagreement of the best responses between the two RECIST versions. CONCLUSION RECIST 1.1 showed a highly concordant response assessment with RECIST 1.0 in metastatic CRC and its clinical impact on therapeutic decisions was minimal.
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Affiliation(s)
- H J Jang
- Department of Internal Medicine, Hallym University Medical Center, Hallym University College of Medicine, Seoul, Republic of Korea
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Hwang JY, Park JJ, Yu HJ, Hur YB, Arzul I, Couraleau Y, Park MA. Ostreid herpesvirus 1 infection in farmed Pacific oyster larvae Crassostrea gigas (Thunberg) in Korea. J Fish Dis 2013; 36:969-972. [PMID: 23957681 DOI: 10.1111/jfd.12093] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/09/2012] [Revised: 01/08/2013] [Accepted: 01/08/2013] [Indexed: 06/02/2023]
Affiliation(s)
- J Y Hwang
- Fish Pathology Division, National Fisheries Research and Development Institute (NFRDI), Busan, Korea
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Park JJ, Yeo JM, Hayes P. A curious case of unilateral spider nevi, cirrhosis and stroke: unilateral nevoid telangiectasia syndrome. J R Coll Physicians Edinb 2013; 43:222-4. [PMID: 24087800 DOI: 10.4997/jrcpe.2013.306] [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] [Indexed: 11/19/2022] Open
Abstract
A 55-year-old Caucasian man presented with unilateral right facial spider nevi. Relevant medical history included a right-sided cerebrovascular accident (CVA) in 1997 and decompensated alcoholic liver disease, diagnosed in 2007. The literature describes approximately 100 cases of unilateral spider nevi associated with different aetiologies, grouped under 'unilateral nevoid telangiectasia syndrome' (UNTS). This is a rare presentation of a commonly observed sign in clinical practice. This case offers an opportunity to explore the origins of spider nevi and highlights the benefit of sharing knowledge in order to help elucidate the potential mechanisms underlying common signs.
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Affiliation(s)
- J J Park
- JJ Park, University of Edinburgh Medical School, The Chancellor's Building, The University of Edinburgh College of Medicine and Veterinary Medicine 49 Little France Crescent, Edinburgh EH16 4SB, UK.
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Zawadzki M, Velchuru VR, Albalawi SA, Park JJ, Marecik S, Prasad LM. Is hybrid robotic laparoscopic assistance the ideal approach for restorative rectal cancer dissection? Colorectal Dis 2013; 15:1026-32. [PMID: 23528255 DOI: 10.1111/codi.12209] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/21/2011] [Accepted: 12/05/2012] [Indexed: 01/01/2023]
Abstract
AIM While the use of robotic assistance in the management of rectal cancer has gradually increased in popularity over the years, the optimal technique is still under debate. The authors' preferred technique is a robotic low anterior resection that requires a hybrid approach with laparoscopic hand-assisted mobilization of the left colon and robotic assistance for rectal dissection. The aim of this study was to determine the efficacy of this approach as it relates to intra-operative and short-term outcomes. METHOD Between August 2005 and July 2011, consecutive patients undergoing rectal dissection for cancer via the hybrid robotic technique were included in our study. Demographics, margin positivity, intra-operative and short-term outcomes were evaluated. RESULTS The preferred approach was performed in 77 patients with rectal adenocarcinoma. Of these, 68 underwent low anterior resection and nine had a coloanal pull-through procedure (mean age 60.1 years; mean body mass index 28.0 kg/m(2) ; mean operative time 327 min; conversion rate 3.9%). Three patients (3.9%) had positive resection margins (one circumferential, two distal). Five patients had an anastomotic leak (6.4%). No robot-specific complications were observed. CONCLUSION The hybrid approach involving hand-assisted left colon mobilization and robotic rectal dissection is a safe and feasible technique for minimally invasive low anterior resection. This approach can be considered an viable option for surgeons new to robotic rectal dissection.
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Affiliation(s)
- M Zawadzki
- Department of Colon and Rectal Surgery, University of Illinois, Chicago, IL, USA
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Kim S, Cha JM, Lee CH, Shin HP, Park JJ, Joo KR, Lee JI, Jeun JW, Lim K, Lim JU, Choi JH. Rectal perforation due to benign stricture caused by rectal burns associated with hot coffee enemas. Endoscopy 2012; 44 Suppl 2 UCTN:E32-3. [PMID: 22396264 DOI: 10.1055/s-0031-1291512] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/10/2022]
Affiliation(s)
- S Kim
- Department of Internal Medicine, Kyung Hee University Hospital at Gang Dong, Kyung Hee University College of Medicine, Seoul, Republic of Korea
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Kim SH, Kim DH, Kang H, Park JJ, Seong SH, Suk EH, Hwang JH. Estimation of the nares-to-epiglottis distance and the nares-to-vocal cords distance in young children. Br J Anaesth 2012; 109:816-20. [PMID: 22864519 DOI: 10.1093/bja/aes267] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023] Open
Abstract
BACKGROUND Estimation of the nares-to-epiglottis and nares-to-vocal cords distances would facilitate the selection of properly sized nasopharyngeal airways and appropriate positioning of a fibreoptic bronchoscope in young children. The purposes of this study were to measure the nares-to-epiglottis and nares-to-vocal cords distances and to create an algorithm to predict these distances based on anatomical landmarks and paediatric characteristic data. METHODS Two hundred and eleven children, aged 1-10 yr, undergoing elective surgery were investigated. After induction of general anaesthesia, the distances from the nares to the epiglottis/vocal cords were measured using a nasogastric tube. After intubation, the distances from the lateral border of the nose to the ipsilateral mandible angle (nares-to-mandible distance) and the tragus of the ear (nares-to-tragus distance) were measured using a tape measure. RESULTS The nares-to-epiglottis and nares-to-vocal cords distances were significantly correlated with the age, weight, height, and external measurements (P<0.001). By stepwise multiple linear regression analysis, formulas were obtained for the nares-to-epiglottis distance (cm)=2.606+0.058×height (cm)+0.231×the nares-to-mandible distance (cm)-0.304 (gender) (r(2)=0.754) and for the nares-to-vocal cords distance (cm)=4.947+0.06×height (cm)+0.228×nares-to-mandible distance (cm)-0.283 (gender) (r(2)=0.803). CONCLUSIONS The nares-to-epiglottis and nares-to-vocal cords distances can be predicted using the height and the nares-to-mandible distance in young children. CLINICAL TRIAL REGISTRATION NUMBER Clinical Research Information Service KCT0000150.
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Affiliation(s)
- S H Kim
- Department of Anaesthesiology and Pain Medicine, University of Ulsan College of Medicine, Asan Medical Center, Seoul, Republic of Korea
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Kim YI, Chung KY, So BJ, Park JJ. Mucosal protective effect of PGI2 on canine small bowel auto-transplantation. Transplant Proc 2012; 44:1169-70. [PMID: 22564655 DOI: 10.1016/j.transproceed.2012.02.025] [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: 10/28/2022]
Abstract
PURPOSE We designed this experimental study to assess the mucosal protective effects of continuous prostaglandin I2 (PGI2) infusion after canine small bowel autotransplantation. MATERIALS AND METHODS Six Mongrel dogs were randomly divided two groups: PGI2 (n = 3) and control (n = 3). The small bowel from jejunum to ileum was obtained, including the mesenteric vascular pedicle. After cold flushing ex vivo, the harvested segment was preserved in an icebox for 3 hours. Thereafter we reimplanted the harvested intestinal segment. While completing the anastomosis, PGI2 (50 μg) was slowly infused through the mesenteric artery in the PGI2 group versus the same volume of saline in the control group. At 1, 3 and 6 days after autotransplantation, we obtained blood samples, and at 6 days, small bowel segments. Endotoxin and interleukin 6 (IL-6) levels were measured and all histologic specimens stained with hematoxylin-eosin H-E were reviewed by a pathologist to grade mucosal damage as: mild (1 point), moderate (2 points), or severe (3 points) change. RESULTS Mean basal serum endotoxin levels were similar in both groups the PGI2 groups versus control group were 0.216 ± 0.018 versus 0.223 ± 0.040 EU/mL, respectively. However, on day 3 after the operation, the PGI2 group showed much decreased levels of serum endotoxin compared to control levels: 0.349 ± 0.196 versus 0.842 ± 0.446 EU/mL. The mean concentration of serum IL-6 on day 1 after operation among the PGI2 versus control group were 32.13 ± 7.13 pg/mL versus 36.96 ± 3.65 pg/mL. The histologic scores at 6 days after the operation were PGI2 group versus control group: 1.33 versus 1.66 (P = NS). CONCLUSION Continuous infusions of PGI2 through the mesenteric artery after the canine small bowel autotransplantation may protect the small bowel mucosal barrier.
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Affiliation(s)
- Y I Kim
- Department of Surgery, Ewha Womans University, School of Medicine, Seoul, Korea
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Park S, Chun HJ, Keum B, Lee BJ, Seo YS, Kim YS, Park JJ, Jeen YT, Lee HS, Um SH, Kim CD, Ryu HS. Successful salvage treatment of peptic duodenal stenosis with repeat insertion of self-expanding stent after failed balloon dilation. Endoscopy 2011; 43 Suppl 2 UCTN:E187-8. [PMID: 21590595 DOI: 10.1055/s-0030-1256323] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- S Park
- Division of Gastroenterology and Hepatology, Department of Internal Medicine, Hanil General Hospital, KEPCO Medical Foundation, Seoul, Korea
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Lim JU, Joo KR, Park JJ, Shin HP, Cha JM, Lee JI. Duodenal obstruction following papillary stenosis: a rare complication after endoscopic sphincterotomy. Endoscopy 2011; 42 Suppl 2:E342-3. [PMID: 21170840 DOI: 10.1055/s-0030-1255975] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/10/2022]
Affiliation(s)
- J U Lim
- Department of Internal Medicine, Kyung Hee University East-West Neo Medical Center, Seoul, Korea
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Msall ME, Limperopoulos C, Park JJ. Neuroimaging and cerebral palsy in children. Minerva Pediatr 2009; 61:415-424. [PMID: 19752850] [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: 05/28/2023]
Abstract
Cerebral palsy (CP) is a description of a spectrum of central nervous system (CNS) impairments that affect mobility, communication, intellectual ability, and neurobehavior as a result of developmental brain dysfunction. CP is the most common contributor to motor disability in children with prevalence of about 2-3/1000 live births globally. Presently, no curative therapies or successful methods of prevention on a population level are available for children with one of the cerebral palsy syndromes. Despite these challenges, orthopedic, rehabilitation, neuropharmacological, and other management interventions can help maintain mobility, prevent deformity, and promote quality of life for children with CP. Typically, the diagnosis of CP is based on clinical observations and parent concerns regarding delays in attaining motor milestones (e.g., rolling, sitting, crawling, walking), not on laboratory testing or neuroimaging. However, since 2004 the American Academy of Neurology (AAN) has recommended that neuroimaging of the CNS be part of diagnostic process for cerebral palsy. Although the guideline was initially met with controversy and criticism, neuroimaging has allowed a broader appreciation of timing of lesions, extent of white matter involvement, and the complexity of the motor spectrum of disability. In this article we shall describe the major types of neuroimaging techniques and review their roles in identification and evaluation of children with one of the cerebral palsy syndromes. The authors will focus on the emerging knowledge of how brain structure can inform us about children's functioning, especially among children with prematurity, recognizing that we are only beginning to understand brain plasticity and developmental resiliency.
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Affiliation(s)
- M E Msall
- Section of Developmental and Behavioral Pediatrics University of Chicago, Pritzker School of Medicine, JP Kennedy Research Center on Intellectual and Neurodevelopmental Disabilities, Comer and LaRabida Children's Hospitals, Chicago, IL, USA.
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Lee SS, Park YW, Park JJ, Kang YM, Nam EJ, Kim SI, Lee JH, Yoo WH, Lee SI. Combination treatment with leflunomide and methotrexate for patients with active rheumatoid arthritis. Scand J Rheumatol 2009; 38:11-4. [PMID: 19191187 DOI: 10.1080/03009740802360632] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
OBJECTIVE To determine the efficacy and safety of the combination of leflunomide and methotrexate for the treatment of patients with active rheumatoid arthritis (RA) in an open, non-comparative, multicentre trial. METHODS Seventy-four patients with active RA were enrolled to receive concomitantly leflunomide (no loading dose, 10 mg/day) and methotrexate (starting at 7.5 mg/week and titrating up to 15 mg/week) for 20 weeks. The primary end-point was a 20% improvement in the American College of Rheumatology (ACR) criteria at 20 weeks. Safety measures included evaluation of adverse events at each visit and laboratory data, including haematology and liver function tests. Intention-to-treat analyses were conducted. RESULTS Sixty-five patients completed 20 weeks of treatment, and 71.6% were responders based on the ACR20 criteria. After 20 weeks, the mean changes were -16.3 for tender joint count, -12.0 for swollen joint count, -44.0 for physician global assessment, -34.3 for patient global assessment, -22.7 for erythrocyte sedimentation rate, and -0.65 for the Health Assessment Questionnaire score. Adverse events occurred in 40.5% of the patients, and were considered serious in four patients who discontinued therapy. Abnormal liver function was noted for 16 patients (21.6%). Two of these patients were withdrawn from the study; after discontinuing the medication, their liver function recovered fully. CONCLUSION THE combination of leflunomide and methotrexate was effective and well tolerated in the treatment of active RA patients. This combination may be a useful option as an initial treatment for active RA before starting biological agents.
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Affiliation(s)
- S-S Lee
- Department of Internal Medicine, Chonnam National University Medical School, Gwangju, Republic of Korea.
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Jung SW, Lee SW, Hyun JJ, Kim DI, Koo JS, Yim HJ, Park JJ, Lee HS, Chun HJ, Um SH, Choi JH, Kim CD, Ryu HS. Efficacy of Helicobacter pylori eradication therapy in chronic liver disease. Dig Liver Dis 2009; 41:134-40. [PMID: 18436489 DOI: 10.1016/j.dld.2008.03.005] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/14/2007] [Revised: 03/03/2008] [Accepted: 03/03/2008] [Indexed: 12/11/2022]
Abstract
BACKGROUND/AIMS Peptic ulcers occur more commonly in patients with liver cirrhosis (LC). Helicobacter pylori is recognized as the most important etiology in the pathogenesis of peptic ulcers. We investigated the efficacy of proton pump inhibitor (PPI)-based triple therapy in patients with chronic liver disease and peptic ulcer. PATIENTS AND METHODS One hundred sixty-three patients with LC or chronic hepatitis (CH) with a peptic ulcer and proven H. pylori infection were included. The combination of PPI, amoxicillin (1.0 g), and clarithromycin (500 mg), each given twice daily, was administered for 1 or 2 weeks. The eradication of H. pylori was determined by the rapid urease test, histology, or the 13C-urea breath test at least 4 weeks after completing the treatment. RESULTS The eradication rate of H. pylori was similar between the LC and CH groups; 82.6% and 88.1%, respectively. In addition, there were no significant differences in eradication rates between the patients with Child-Pugh class A and Child-Pugh class B/C disease. The side effects in each group were generally mild. Only the serum ALT levels showed a significant correlation with the success of H. pylori eradication in both the LC and CH groups. CONCLUSION The PPI-based triple therapy achieves high eradication rates for H. pylori infection, in patients with chronic liver disease, without significant side effects.
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Affiliation(s)
- S W Jung
- Division of Gastroenterology, Department of Internal Medicine, Korea University College of Medicine, Ansan Hospital, 516 Gojan-dong, Danwon-gu, Ansan-si, Gyeonggi-do 425-707, South Korea
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Abstract
OBJECTIVES alpha-Melanocyte stimulating hormone (alpha-MSH) may ameliorate renal ischemia-reperfusion (I/R) injury. Recent data suggest that melanocortin receptors may be related to the anti-inflammatory and immunomodulating action for alpha-MSH. We designed this experiment to determine the renal distribution of alpha-MSH receptors; melanocortin-1 receptor (MC-1R) and melanocortin-3 receptor (MC-3R). METHODS Sprague-Dawley male rats (n = 24) were randomly divided into 2 groups: the sham (n = 2) and the operation groups with warm ischemia (n = 12). Animals in the operation group were subjected to 40 minutes of warm renal ischemia. Western blotting analyses and immunohistochemistry were employed to determine expression of MC-1R and MC-3R. RESULTS Expression of MC-1R and MC-3R was decreased on 1 day after reperfusion. Immunohistochemical study confirmed the findings of Western blot analysis. CONCLUSIONS The present study demonstrated novel renal expression of MC-1R and MC-3R, especially in the outer medulla, representative of the renal I/R injury. Our current study suggested that the mechanisms of action of alpha-MSH may significantly attenuate the renal I/R injury by specific kidney-targeted effects via MC-Receptors as well as by systemic cytokine effects.
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Affiliation(s)
- Y S Lee
- Division of Nephrology, the Eulji University Hospital, Seoul, South Korea.
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Ju DJ, Byun IG, Park JJ, Lee CH, Ahn GH, Park TJ. Biosorption of a reactive dye (Rhodamine-B) from an aqueous solution using dried biomass of activated sludge. Bioresour Technol 2008; 99:7971-7975. [PMID: 18511271 DOI: 10.1016/j.biortech.2008.03.061] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/08/2007] [Revised: 03/26/2008] [Accepted: 03/31/2008] [Indexed: 05/26/2023]
Abstract
Low cost, locally available biomaterial was tested for its ability to remove reactive dyes from aqueous solution. Granules prepared from dried activated sludge (DAS) were utilized as a sorbent for the uptake of Rhodamine-B (Rh-B) dye. The effects of various experimental parameters (dye concentration, sludge concentrations, swelling, pretreatment and other factors) were investigated and optimal experimental conditions were ascertained. Nearly 15min was required for the equilibrium adsorption, and Rh-B dyes could be removed effectively. Dye removal performance of Rh-B and DAS increased with increasing concentrations. The acid pretreated biomass exhibited a slightly better biosorption capacity than alkali pretreated or non-pretreated biomass. The optimum swelling time for dye adsorption of the DAS within the swelling time range studied was 12h. Both the Freundlich and Langmuir isotherm models could describe the adsorption equilibrium of the reactive dye onto the activated sludge with the Langmuir isotherm showing the better agreement of the two. Second-order kinetic models confirmed the agreement.
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Affiliation(s)
- D J Ju
- Department of Environmental Engineering, Pusan National University, Busan 609-735, Republic of Korea.
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Park JJ, Byun IG, Yu JC, Park SR, Ju DJ, Hur SH, Park TJ. Analysis of nitrifying bacterial communities in aerobic biofilm reactors with different DO conditions using molecular techniques. Water Sci Technol 2008; 57:1889-1899. [PMID: 18587175 DOI: 10.2166/wst.2008.622] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
In order to assess the relationship between the dissolved oxygen (DO) concentration and the characteristics of nitrifying bacterial communities in an aerobic biofilm reactor, molecular techniques including denaturing gradient gel electrophoresis (DGGE)/cloning based on PCR targeting 16S rRNA and the amoA gene and fluorescence in situ hybridisation (FISH) were conducted. The D-1, D-2, D-3 and D-4 reactors with different DO concentrations (1, 3, 5 and 7 mg/L, respectively) were set up in the thermostat and acclimated. The optimal DO concentration with stable nitrification efficiency was above 5.0 mg/L. As was shown by the results of DGGE and cloning, the community of ammonia-oxidising bacteria (AOB) and the ratio of Nitrosomonas sp. changed only slightly despite their differing nitrification efficiencies. The results of FISH indicated that higher DO concentrations resulted in an increase in AOB and nitrite-oxidising bacteria (NOB), and a reduction in heterotrophic microorganisms. The INT-dehydrogenase activity (DHA) test demonstrated that the activity of AOB decreased with reductions in the DO concentration. This means that the DO concentration does not influence the community of AOB, but rather the activity of AOB. In the relationship between the attached biomass and the nitrification efficiency, only the active biomass affected the nitrification efficiencies.
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Affiliation(s)
- J J Park
- School of Civil and Environmental Engineering, Pusan National University, 609-735, Busan, Korea
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Lee YJ, Kang SW, Song JK, Park JJ, Bae YD, Lee EY, Lee EB, Song YW. Serum galectin-3 and galectin-3 binding protein levels in Behçet's disease and their association with disease activity. Clin Exp Rheumatol 2007; 25:S41-S45. [PMID: 17949550] [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: 05/25/2023]
Abstract
OBJECTIVE To determine the serum levels of galectin-3 (Gal-3) and galectin-3 binding protein (G3BP) and to evaluate the associations between clinical features and these levels in patients with Behçet's disease (BD). METHODS Fifty patients with BD (mean age 40.6 +/- SEM 1.4 years; 21 males, 29 females; 26 active and 24 inactive patients), 20 patients with rheumatoid arthritis (RA), and 20 patients with systemic lupus erythematosus (SLE) were enrolled. Clinical features of BD patients including BD activity and severity over the previous 4 weeks were reviewed and serum levels of Gal-3 and G3BP were determined using enzyme-linked immunosorbent assays (ELISA). RESULTS Serum Gal-3 levels were significantly higher in total BD patients than in healthy controls (mean +/- SEM, 10.68 +/- 0.93 versus 7.59 +/- 0.48 ng/mL; p = 0.0042 by Student's t-test), and active BD patients had significantly higher levels of serum Gal-3 than inactive patients and controls (13.08 +/- 1.53 in active BD, 8.08 +/- 0.71 ng/mL in inactive BD; p = 0.000039 by one way ANOVA). Although mean G3BP serum levels were not different in total BD patients and controls, active BD patients (6806.63 +/- 468.58 ng/mL) had higher G3BP levels than controls (5421.05 +/- 286.02 ng/mL; p = 0.031 by one way ANOVA). Additionally, serum Gal-3 significantly increased in patients with RA (p = 0.019 by t-test) and SLE (p = 0.00069) and G3BP increased in patients with SLE (p = 0.000012), compared to those in healthy controls. When we analyzed for associations with clinical features over the previous 4 weeks, Gal-3 was associated with orogenital ulcers (p = 0.036 by t-test) and time elapsed from symptom onset (p = 0.032, Pearson's coefficient = 0.314). Serum concentrations of Gal-3 (p = 0.013) and G3BP (p = 0.032) were positively correlated with the BD severity score for the previous 4 weeks. Gal-3 levels were significantly correlated with TNF-alpha (p = 0.048, Pearson's coefficient = 0.281) and G3BP levels were correlated with levels of C-reactive protein (p = 0.021, Pearson's coefficient = 0.329) in total BD patients. In multivariate analysis of all cytokines levels, only Gal-3 was significantly related to BD activity or severity for the previous 4 weeks. CONCLUSION These results suggest that serum levels of Gal-3 and G3BP are increased in active BD patients and Gal-3 can be a new biomarker indicating disease activity in BD although their increments are not disease-specific.
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Affiliation(s)
- Y J Lee
- Medical Research Center, Seoul National University College of Medicine, Korea
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Lee SY, Park YJ, Oh EJ, Yoo JK, Park JJ, Park KG, Han K. False susceptibility to cefotetan reported by MicroScan for DHA-type AmpC beta-lactamase-producing Klebsiella pneumoniae. Clin Microbiol Infect 2007; 13:539-41. [PMID: 17331122 DOI: 10.1111/j.1469-0691.2007.01695.x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [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: 11/28/2022]
Abstract
This study evaluated the accuracy of cefotetan susceptibility determination using the MicroScan WalkAway system for AmpC-producing Klebsiella pneumoniae. In total, 57 K. pneumoniae isolates that showed a D-shape flattening in a double-disk synergy test were studied. Cefotetan MICs were determined by the agar dilution method. The bla(DHA) gene was detected in all 57 isolates, one of which co-harboured bla(CMY-1). According to the MicroScan system, 28 isolates were susceptible, 18 were intermediately-resistant, and 11 were resistant to cefotetan. Compared with the agar dilution method, very major, minor and major error rates were 28.1% (16/57), 47.4% (27/57) and 1.8% (1/57), respectively.
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Affiliation(s)
- S Y Lee
- Department of Laboratory Medicine, College of Medicine, The Catholic University of Korea, Seoul, Korea
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Park YW, Woo H, Jeong YY, Lee JH, Park JJ, Lee SS. Association of nodular regenerative hyperplasia of the liver with porto-pulmonary hypertension in a patient with systemic lupus erythematosus. Lupus 2007; 15:686-8. [PMID: 17120597 DOI: 10.1177/0961203306070976] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [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: 12/16/2022]
Abstract
A 37-year old woman with systemic lupus erythematosus (SLE) complicated by pulmonary hypertension (PHT) was admitted to evaluate abnormal liver function. Radiological imaging study, including ultrasonography, computed tomography and magnetic resonance imaging and upper gastrointestinal endoscopy, revealed multiple hepatic nodules, hepatosplenomegaly and esophageal varices. Percutaneous needle liver biopsy showed non-cirrhotic hepatic nodules with hyperplastic hepatocytes surrounded by atrophic hepatocytes, confirming the diagnosis of nodular regenerative hyperplasia (NRH) associated with non-cirrhotic portal hypertension (PT). NRH of the liver is known to be a very rare hepatic manifestation in rheumatic diseases. This case shows the association of NRH with porto-pulmonary hypertension in SLE.
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Affiliation(s)
- Y W Park
- Department of Rheumatology, Chonnam National University Hospital, Gwangju, Republic of Korea
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Hand BD, McCole SD, Brown MD, Park JJ, Ferrell RE, Huberty A, Douglass LW, Hagberg JM. NOS3 Gene Polymorphisms and Exercise Hemodynamics in Postmenopausal Women. Int J Sports Med 2006; 27:951-8. [PMID: 16761221 DOI: 10.1055/s-2006-923901] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
We tested whether the G894T and T-786C NOS3 polymorphisms were associated with exercise cardiovascular (CV) hemodynamics in sedentary, physically active, and endurance-trained postmenopausal women. CV hemodynamic parameters including heart rate (HR), systolic (SBP) and diastolic (DBP) blood pressures and cardiac output (Q), as determined by acetylene rebreathing, stroke volume (SV), arteriovenous oxygen difference (a-vO2 diff), and total peripheral resistance (TPR) were measured during submaximal (40, 60, 80 %) and maximal (approximately 100 % VO2max) exercise. NOS3 G894T genotype was not significantly associated, either independently or interactively with habitual physical activity (PA) level, with SBP, Q, TPR, or a-vO2 diff during submaximal or maximal exercise. However, NOS3 894T non-carriers had a higher submaximal exercise HR than NOS3 894T allele carriers (120 +/- 2 vs. 112 +/- 2 beats/min, p = 0.007). NOS3 894T allele carriers had a higher SV than 894T non-carriers (78 +/- 2 vs. 72 +/- 2 ml/beat, p = 0.03) during submaximal exercise. NOS3 894T non-carriers also had a higher maximal exercise HR averaged across habitual PA groups than T allele carrier women (165 +/- 2 vs. 158 +/- 2 beats/min, p = 0.04). NOS3 894T allele carriers also tended to have a higher SV during maximal exercise than 894T non-carriers (70 +/- 2 vs. 64 +/- 2 ml/beat, p = 0.08). NOS3 T-786C genotype was not significantly associated, either independently or interactively, with any of the CV hemodynamic measures during submaximal or maximal exercise. These results suggest an association of NOS3 G894T genotype with submaximal and maximal exercise CV hemodynamic responses, especially HR, in postmenopausal women.
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Affiliation(s)
- B D Hand
- Department of Kinesiology, University of Maryland, College Park, MD 20742, USA
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Abstract
AIMS To determine quality of life and adequacy of education and counselling in Australian patients with Graves' ophthalmopathy during the course of their illness. METHODS A cross sectional study was conducted at the orbital and endocrinology clinics of Royal Brisbane Hospital on 162 consecutive patients with Graves' ophthalmopathy who were managed between the 1992 and 2000. The Graves' ophthalmopathy quality of life (GO-QOL) survey modified for Australian conditions was distributed to study participants. Of the 19 questions asked, nine questions related to visual functioning, eight questions were about the psychosocial consequences of changed appearance, and two questions referred to education and counselling. Additionally, clinical data on the severity of illness were collected retrospectively from the medical notes of these patients. RESULTS Completed questionnaires were received from 128 patients. The majority of patients reported limitations in daily activities such as hobbies, driving, watching television and reading, as well as impaired self confidence. The mean GO-QOL scores in this study were (100 representing maximum QOL): visual functioning 59.0 (SD 28.0), psychosocial consequences of changed appearance 54.5 (28.4), and education and counselling 59.1 (38.8). Only about a quarter of patients indicated that education and counselling were adequate and helpful. CONCLUSION Graves' ophthalmopathy profoundly affects QOL and adequate education and counselling are essential for helping patients to cope with their illness. The GO-QOL survey is a simple, practical tool that can be used easily in a clinic to determine the QOL issues in subjects with Graves' ophthalmopathy.
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Affiliation(s)
- J J Park
- Eyelid, Lacrimal and Orbital Clinic, Royal Brisbane Hospital, Queensland 4029, Australia
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Jang YK, Park JJ, Lee MC, Yoon BH, Yang YS, Yang SE, Kim SU. Retinoic acid-mediated induction of neurons and glial cells from human umbilical cord-derived hematopoietic stem cells. J Neurosci Res 2004; 75:573-84. [PMID: 14743441 DOI: 10.1002/jnr.10789] [Citation(s) in RCA: 90] [Impact Index Per Article: 4.5] [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: 12/21/2022]
Abstract
Recent studies reporting trans-differentiation of mononucleated cells derived from human umbilical cord blood into neuronal cells aroused interest among investigators for their clinical implication and significance in regenerative medicine. In the present study, purified populations of hematopoietic stem cells were isolated via magnetic bead sorting and fluorescence-activated cell sorter (FACS) using a specific CD133 antibody, a cell type-specific marker for hematopoietic stem cells, and grown in culture in the presence of retinoic acid (RA). CD133+ hematopoietic stem cells expressed neuronal and glial phenotypes after RA treatment. RT-PCR analysis indicated that the RA treated CD133+ cells expressed mRNA transcripts for ATP-binding cassettes transporter ABCG2 (a universal stem cell marker), nestin (a specific cell type marker for neural stem cells), Musashi1 (a specific marker for neural stem cells) and RA receptors (RAR) including RAR-alpha, RAR-beta, and retinoid X receptor (RXR)-gamma. RA-treated CD133+ cells expressed mRNA transcripts for neuron-specific markers neurofilament proteins (NF-L, -M, -H) and synaptophysin as determined by RT-PCR, structural proteins characteristic of neurons including tubulin beta III and neuron specific enolase (NSE) by Western blot, and neuron-specific markers NeuN and microtubule-associated protein-2 (MAP2) by immunocytochemistry. RA-treated CD133+ cells also expressed the astrocyte-specific marker glial fibrillary acidic protein (GFAP), as demonstrated by RT-PCR, Western blot, and immunocytochemistry. In addition, RA-treated CD133+ cells expressed cell type-specific markers for oligodendrocytes including myelin basic protein (MBP) as shown by RT-PCR, proteolipid protein (PLP) by Western blot analysis, and cyclic nucleotide phosphodiesterase (CNPase) by immunostaining. Upregulated expression of several basic helix-loop-helix (bHLH) transcription factors important for early neurogenesis, including Otx2, Pax6, Wnt1, Olig2, Hash1 and NeuroD1, was also demonstrated in CD133+ cells after RA treatment. These results indicate that human cord blood-derived CD133+ hematopoietic stem cells could trans-differentiate into neural cell types of neuron-like cells, astrocytes, and oligodendrocytes by RA treatment.
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Affiliation(s)
- Y K Jang
- Brain Disease Research Center, Ajou University School of Medicine, Suwon, Korea
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Lee DG, Park JJ, Sung JH, Nam CH. Wave-front phase measurements of high-order harmonic beams by use of point-diffraction interferometry. Opt Lett 2003; 28:480-482. [PMID: 12659286 DOI: 10.1364/ol.28.000480] [Citation(s) in RCA: 3] [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: 05/24/2023]
Abstract
We report the wave-front phase measurement of high-order harmonics employing point-diffraction interferometry. The high-order harmonics generated in a gas-filled hollow tube showed excellent spatial coherence over nearly the whole cross section of the harmonic beams. Using this coherent harmonic source in the extreme-ultraviolet-soft-x-ray region, we have demonstrated the operation of a point-diffraction interferometer and measured the wave-front phase of high-order harmonics.
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Affiliation(s)
- D G Lee
- Department of Physics, Coherent X-Ray Research Center, Korea Advanced Institute of Science and Technology, Daejeon 305-701, Korea.
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Chen LM, Park JJ, Hong KH, Kim JL, Zhang J, Nam CH. Emission of a hot electron jet from intense femtosecond-laser-cluster interactions. ACTA ACUST UNITED AC 2002; 66:025402. [PMID: 12241228 DOI: 10.1103/physreve.66.025402] [Citation(s) in RCA: 35] [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] [Received: 03/28/2002] [Indexed: 11/07/2022]
Abstract
A directional hot electron jet with energy higher than 100 keV was generated along the laser propagation direction from Ar clusters irradiated with a laser pulse of duration 28 fs and intensity 1 x 10(17) W/cm(2). The hot electron jet was detected only with linearly polarized laser pulses, not with circularly polarized pulses. Channel betatron resonance is believed to be the main accelerating mechanism for this directional hot electron jet.
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Affiliation(s)
- L M Chen
- Department of Physics and Coherent X-Ray Research Center, Korea Advanced Institute of Science and Technology, Taejon 305-701, Korea
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Abstract
BACKGROUND To evaluate the possibility of autologous cardiomyocyte transplantation, we transplanted cultured autologous cells into an infarct region developed by coronary artery ligation in an ovine model. MATERIALS AND METHODS A chronic heart failure model with a considerable portion of myocardial infarction was created in sheep using sequential ligation of the homonymous artery and its diagonal branch. Autologous cardiomyocytes were cultured and isolated from the right ventricular infundibulum. After a predetermined interval (one animal for two months and the other for three months), the two animals were reanesthetized and a suspension of cultured autologous vetricular cells in 0.3 ml of culture medium (1.2 x 10(7) cells) was injected into the center of three out of the four sites in the infarcted area using a tuberculin syringe. The same amount of culture medium was injected with an identical procedure into the center of the remaining site, as control. The animals were kept alive for a further month, and then sacrificed for postmortem heart examinations. Light microscopic analysis and immunohistochemical study for myoglobin were done. RESULTS AND CONCLUSIONS On postmortem gross examination, well-demarcated thin-walled anteroseptal infarcts with chamber enlargement were clearly seen in specimens from the two animals. Microscopic analysis showed homogenous fibrosis throughout the infarcted areas. In both animals, one of the three sites of cardiomycyte injection showed an islet of cardiomyocytes in the mid-myocardium, while none were observed in the control site of either animal. A layer of cardiomyocytes was observed in subendocardial regions, as it was in the control areas. In conclusion, cardiomyocyte transplantation into the infarct regions developed by coronary artery ligation in an ovine model was achieved with only limited success. An understanding of why only 33% of cardiomyocyte-injection sites demonstrated viable cardiomyocytes, in the form of tiny cell islets, remains to be elucidated.
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Affiliation(s)
- W G Kim
- Department of Thoracic and Cardiovascular Surgery and Heart Research Institute, Seoul National University, College of Medicine and Clinical Research Institute, Seoul National University Hospital, Korea
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Abstract
We report a reliable chronic heart failure model in sheep using sequential ligation of the homonymous artery and its diagonal branch. After a left anterior thoracotomy in Corridale sheep, the homonymous artery was ligated at a point approximately 40% of the distance from the apex to the base of the heart, and after 1 hour, the diagonal vessel was ligated at a point at the same level. Hemodynamic measurements were done preligation, 30 minutes after the homonymous artery ligation, and 1 hour after diagonal branch ligation. The electrocardiograms were obtained as needed, and cardiac function was also evaluated with ultrasonography. After a predetermined interval (2 months for five animals and 3 months for two animals), the animals were reevaluated in the same way as before, and were killed for postmortem examination of their hearts. All seven animals survived the experimental procedures. Statistically significant decreases in systemic arterial blood pressure and cardiac output and increases in pulmonary artery capillary wedge pressure were observed 1 hour after sequential ligation of the homonymous artery and its diagonal branch. Untrasonographic analyses demonstrated variable degrees of anteroseptal dyskinesia and akinesia in all animals. The data from animals at 2 months after coronary artery ligation showed significant increases in central venous pressure, pulmonary artery pressure, and pulmonary artery capillary wedge pressure. Left ventricular enddiastolic dimension and left ventricular end-systolic dimension on ultrasonographic studies were also increased. Electrocardiography showed severe ST elevation immediately after the ligation and pathologic Q waves were found at 2 months after ligation. The thin walled infarcted areas with chamber enlargement were clearly seen in the hearts removed at 2 and 3 months after ligation. In conclusion, we could achieve a reliable ovine model of chronic heart failure using a simple concept of sequential ligation of the homonymous and diagonal arteries. This animal model was comparable to the clinical situation.
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Affiliation(s)
- W G Kim
- Department of Thoracic and Cardiovascular Surgery and Heart Research Institute, Seoul National University Hospital, Korea
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Chung MG, Kang DH, Park DK, Park JJ, Park HC, Kim JH. Successful treatment of Boerhaave's syndrome with endoscopic insertion of a self-expandable metallic stent: report of three cases and a review of the literature. Endoscopy 2001; 33:894-7. [PMID: 11571689 DOI: 10.1055/s-2001-17325] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/10/2022]
Abstract
Boerhaave's syndrome is a rare but life-threatening condition which presents a diagnostic as well as therapeutic challenge. Early diagnosis and prompt surgical repair are critical for survival; however late recognition of esophageal rupture is not unusual. A variety of nonsurgical approaches have been proposed, particularly in the case of delayed diagnosis. In recent years, the insertion of a metallic stent has been described as a promising modality in the treatment of spontaneous esophageal rupture. We report three cases of Boerhaave's syndrome treated with self-expandable metallic stents and review previously published cases.
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Affiliation(s)
- M G Chung
- Department of Internal Medicine, Gachon Medical School, Inchon, Korea
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Affiliation(s)
- J J Park
- Division of Head and Neck Surgery, UCLA School of Medicine, Los Angeles, California 90095, USA
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Kim JH, Yoo BM, Lee KJ, Hahm KB, Cho SW, Park JJ, Kim SS, Park HC, Kim JH. Self-expanding coil stent with a long delivery system for palliation of unresectable malignant gastric outlet obstruction: a prospective study. Endoscopy 2001; 33:838-42. [PMID: 11571678 DOI: 10.1055/s-2001-17340] [Citation(s) in RCA: 56] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
BACKGROUND AND STUDY AIMS Peroral intubation of a self-expanding metal stent is usually difficult in patients with unresectable malignant gastric outlet obstruction, because the delivery systems currently available are not long enough and cannot easily pass the angulated gastroduodenal structure. We carried out a prospective study to assess the efficacy of a coil stent with a newly developed long delivery system, for palliation of unresectable malignant gastric outlet obstruction. PATIENTS AND METHODS In 29 patients with unresectable malignant gastric outlet obstruction, caused by gastric cancer (26 patients), pancreatic head cancer (two patients), or duodenal cancer (one patient), peroral intubation of a self-expanding nickel-titanium coil stent was attempted, using a lengthened delivery system of 150 cm, under endoscopic and fluoroscopic guidance. RESULTS Management was successful in 26 of 29 patients (89.7 %) without immediate major complications. In one patient in whom peroral intubation failed, percutaneous intubation of the coil stent via percutaneous endoscopic gastrostomy was done. After insertion of the coil stent, food ingestion with symptomatic improvement with regard to vomiting was achieved in 26 of 27 patients (96.3 %), including the patient with percutaneous stent insertion. During the follow-up period, dysphagia and Karnofsky scores improved significantly. Stent migration occurred in two patients, and tumor ingrowth in another two; re-intervention was done successfully performed in two instances. The mean survival time was 124 days (range 34 - 310 days) in the 22 patients who had no need for re-intervention during follow-up; among these was a patient who experienced stent occlusion by food material, which was easily corrected with endoscopic flushing. CONCLUSIONS Peroral intubation of a self-expanding coil stent using a long delivery system is a safe and effective palliative technique for unresectable malignant gastric outlet obstruction, and significantly improves the quality of life of patients.
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Affiliation(s)
- J H Kim
- Dept. of Gastroenterology, Ajou University School of Medicine, Suwon, South Korea.
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Becker K, Herold-Mende C, Park JJ, Lowe G, Schirmer RH. Human thioredoxin reductase is efficiently inhibited by (2,2':6',2' '-terpyridine)platinum(II) complexes. Possible implications for a novel antitumor strategy. J Med Chem 2001; 44:2784-92. [PMID: 11495589 DOI: 10.1021/jm001014i] [Citation(s) in RCA: 123] [Impact Index Per Article: 5.3] [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: 11/30/2022]
Abstract
Malignant neoplasms of the brain represent the second leading cause of cancer-related mortality in children under the age of 15. The prognosis of patients with glioblastoma multiforme, the most malignant type of gliomas, remains poor offering a median survival time of only 1 year. (2,2':6',2"-Terpyridine)platinum(II) complexes are known to possess DNA-intercalating activity and have been shown to be potential chemotherapeutic agents. In the present study we identified the selenoenzyme thioredoxin reductase (TrxR) as a major target of (2,2':6',2"-terpyridine)platinum(II) complexes. New complexes were synthesized in order to optimize this inhibition. The NADPH-reduced enzyme is inhibited almost stoichiometrically by the complexes involving a reversible competitive and an irreversible tight-binding component. For the most potent inhibitor, N,S-bis(2,2':6',2"-terpyridine)platinum(II)-thioacetimine trinitrate, the K(i) for the competitive component of the inhibition is 4 nM and the IC(50) for the tight-binding component is 2 nM after an incubation time of 5 min. The closely related but non-selenium-containing enzyme glutathione reductase is much less inhibited (by a factor of >1000). The platinum complexes were found to strongly inhibit the proliferation of three different glioblastoma cell lines as well as of two different head-and-neck squamous carcinoma cell lines. In a glioblastoma cell culture, less than 10 microM of a platinum(II) compound caused an initial drop of hTrxR activity which was followed by an increase of activity in the surviving cells. A 10 microM inhibitor added every 24 h led to 4% residual hTrxR activity but 100% glutathione reductase activity in the cells surviving for 67 h. The potential of (2,2':6',2"-terpyridine)platinum(II) complexes acting simultaneously at two different intracellular targets-hTrxR and DNA-as antitumor agents is discussed.
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Affiliation(s)
- K Becker
- Interdisciplinary Research Center, Giessen University, Heinrich-Buff-Ring 26-32, D-35392 Giessen, Germany.
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