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Kim JH, Kim BM, Kim DJ. In Vitro Analysis of the Efficacy of Endovascular Thrombectomy Techniques according to the Vascular Tortuosity Using 3D Printed Models. AJNR Am J Neuroradiol 2022; 43:1431-1436. [PMID: 36574330 PMCID: PMC9575538 DOI: 10.3174/ajnr.a7633] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2022] [Accepted: 07/17/2022] [Indexed: 01/26/2023]
Abstract
BACKGROUND AND PURPOSE Achieving complete recanalization with the front-line endovascular thrombectomy device improves the outcome of acute stroke. The aim of this study was to evaluate whether various thrombectomy techniques including contact aspiration, stent retriever thrombectomy, and combination therapy differ in first-pass effect and distal emboli in acute large-vessel occlusion simulated using 3D printed nontortuous and tortuous cerebrovascular anatomy models. MATERIALS AND METHODS 3D printed flow models were manufactured using angiographic data of nontortuous and acutely angulated tortuous vascular anatomy from real patients. Three thrombectomy techniques, contact aspiration, stent retriever, and combined methods, were tested under proximal protection with the balloon-guiding catheter. The first-pass effect and distal emboli rates were analyzed in addition to the thrombectomy-failure mechanisms of the respective techniques. RESULTS A total of 30 thrombectomy experiments were performed. The overall incidence of first-pass effect in the nontortuous and tortuous anatomy was 80.0% versus 46.7%. The overall incidence of distal emboli in the nontortuous and tortuous anatomy was 26.7% versus 46.7%. The contact aspiration technique showed better first-pass effect (80.0%) and distal emboli rates (20%) in the tortuous model compared with other techniques. The combined technique did not show remarkable superiority of the first-pass effect and distal emboli in either the nontortuous or tortuous anatomy. Shearing off of the thrombus was the main mechanism of thrombectomy failure in the combined group. CONCLUSIONS The tortuous vascular anatomy may worsen the first-pass effect and distal emboli rates. The combined techniques failed to show improvement in outcome due to the shearing-off phenomenon of the thrombus during retrieval.
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Affiliation(s)
- J H Kim
- From the Department of Radiology (J.H.K.), Yongin Severance Hospital, Yonsei University College of Medicine, Yongin-si, Gyeonggi-do, Republic of Korea
| | - B M Kim
- Department of Radiology (B.M.K., D.J.K.), Research Institute of Radiological Science, Severance Hospital, Yonsei University College of Medicine, Seoul, Korea
| | - D J Kim
- Department of Radiology (B.M.K., D.J.K.), Research Institute of Radiological Science, Severance Hospital, Yonsei University College of Medicine, Seoul, Korea
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Baik SH, Jung C, Kim BM, Han K, Kim DJ. Clot Meniscus Sign: An Angiographic Clue for Choosing between Stent Retriever and Contact Aspiration in Acute Basilar Artery Occlusion. AJNR Am J Neuroradiol 2021; 42:732-737. [PMID: 33541894 DOI: 10.3174/ajnr.a6988] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2020] [Accepted: 11/03/2020] [Indexed: 11/07/2022]
Abstract
BACKGROUND AND PURPOSE The efficacy of mechanical thrombectomy methods may differ depending on the characteristics of the occlusion. The purpose of this study was to compare the recanalization efficacy and treatment outcome of a stent retriever versus contact aspiration in patients with acute basilar artery occlusion according to the angiographic characteristics of the occlusion. MATERIALS AND METHODS One hundred sixty-one patients with acute basilar artery occlusion who underwent mechanical thrombectomy were retrospectively analyzed. A stent retriever was compared with contact aspiration thrombectomy according to the clot meniscus sign, defined as a meniscoid/tram-track-like sidewall contrast opacification of the thrombus. A propensity score matching analysis was performed. Clinical/angiographic characteristics and treatment and clinical outcomes were compared. RESULTS Overall, a stent retriever (n = 118) and contact aspiration (n = 43) did not show significant differences in the successful recanalization (82.2% versus 86.0%) and good clinical outcome rates (32.2% versus 39.5%). In patients with the positive meniscus sign, contact aspiration was associated with shorter procedural time (44 versus 26 minutes, P = .018), a lower number of passes (2 versus 1, P = .041), a higher complete recanalization rate (58.8% versus 85.7%, P = .021), and a higher rate of first-pass effect (27.9% versus 53.6%, P = .031) compared with a stent retriever. After propensity score matching, contact aspiration was associated with higher complete recanalization rates (59.3% versus 85.7%, P = .033). No significant differences in the outcomes were noted between a stent retriever and contact aspiration in patients negative for the meniscus sign. CONCLUSIONS The efficacy of the mechanical thrombectomy techniques may differ according to the angiographic characteristics of occlusion in patients with basilar artery occlusion. Contact aspiration may be more effective in terms of recanalization compared with a stent retriever in patients with the clot meniscus sign.
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Affiliation(s)
- S H Baik
- From the Department of Radiology (S.H.B., C.J.), Seoul National University Bundang Hospital, Seongnam, Korea
| | - C Jung
- From the Department of Radiology (S.H.B., C.J.), Seoul National University Bundang Hospital, Seongnam, Korea
| | - B M Kim
- Department of Radiology (B.M.K., K.H., D.J.K.), Yonsei University College of Medicine, Seoul, Korea
| | - K Han
- Department of Radiology (B.M.K., K.H., D.J.K.), Yonsei University College of Medicine, Seoul, Korea
| | - D J Kim
- Department of Radiology (B.M.K., K.H., D.J.K.), Yonsei University College of Medicine, Seoul, Korea
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Bae S, Ahn SS, Kim BM, Kim DJ, Kim YD, Nam HS, Heo JH, Lee SK. Hyperattenuating lesions after mechanical thrombectomy in acute ischaemic stroke: factors predicting symptomatic haemorrhage and clinical outcomes. Clin Radiol 2020; 76:80.e15-80.e23. [PMID: 32950255 DOI: 10.1016/j.crad.2020.08.021] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2020] [Accepted: 08/19/2020] [Indexed: 11/26/2022]
Abstract
AIM To evaluate the clinical significance of hyperattenuating lesions on CT after mechanical thrombectomy for acute ischaemic stroke, and to identify imaging factors that predict symptomatic haemorrhage and unfavourable outcomes. MATERIALS AND METHODS Seventy-eight patients with acute ischaemic stroke in the anterior circulation who underwent mechanical thrombectomy were evaluated. All patients underwent post-interventional unenhanced computed tomography (CT) within 24 h and follow-up CT or magnetic resonance imaging (MRI) within 7 days. Baseline characteristics and clinical outcomes were compared between patients with and without hyperattenuating lesions. In patients with hyperattenuating lesions, clinical and imaging factors that predict symptomatic haemorrhage and unfavourable outcomes were determined. RESULTS Fifty-six of 78 patients (71.8%) demonstrated hyperattenuating lesions on post-interventional CT. Patients with hyperattenuating lesions showed lower Alberta Stroke Program Early CT score (ASPECTS), persistent/symptomatic haemorrhage, and unfavourable outcomes than those without. In patients with hyperattenuating lesions, larger hyperattenuating lesion volume (>21.3 ml; OR, 55.60, p<0.001) and perilesional oedema (OR, 46.04, p=0.015) were independent factors predicting symptomatic haemorrhage. Older age (OR, 1.2, p=0.006) and lower ASPECTS (OR, 0.45, p=0.046) were independent factors predicting unfavourable outcomes in patients with hyperattenuating lesions. Adding the volume of the hyperattenuating lesion to age and ASPECTS increased the predictive performance of unfavourable outcomes (area under the curve 0.874 versus 0.934, p=0.043). CONCLUSIONS Hyperattenuating lesions on post-interventional CT are associated with increased risk of symptomatic haemorrhage and unfavourable outcomes. Larger hyperattenuating lesion volume is an independent factor of symptomatic haemorrhage and it has added predictive value for unfavourable outcomes.
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Affiliation(s)
- S Bae
- Department of Radiology, National Health Insurance Service Ilsan Hospital, Goyang 10444, South Korea
| | - S S Ahn
- Department of Radiology, Severance Hospital, Research Institute of Radiological Science and Center for Clinical Image Data Science, Yonsei University College of Medicine, Seoul 03722, South Korea.
| | - B M Kim
- Department of Radiology, Severance Hospital, Research Institute of Radiological Science and Center for Clinical Image Data Science, Yonsei University College of Medicine, Seoul 03722, South Korea
| | - D J Kim
- Department of Radiology, Severance Hospital, Research Institute of Radiological Science and Center for Clinical Image Data Science, Yonsei University College of Medicine, Seoul 03722, South Korea
| | - Y D Kim
- Department of Neurology, Severance Hospital, Yonsei University College of Medicine, Seoul 03722, South Korea
| | - H S Nam
- Department of Neurology, Severance Hospital, Yonsei University College of Medicine, Seoul 03722, South Korea
| | - J H Heo
- Department of Neurology, Severance Hospital, Yonsei University College of Medicine, Seoul 03722, South Korea
| | - S-K Lee
- Department of Radiology, Severance Hospital, Research Institute of Radiological Science and Center for Clinical Image Data Science, Yonsei University College of Medicine, Seoul 03722, South Korea
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Park KY, Yeon JY, Kim BM, Jeon P, Kim JH, Jang CK, Kim DJ, Lee JW, Kim YB, Chung J, Song DH, Park HG, Park JS. Efficacy and Safety of Flow-Diverter Therapy for Recurrent Aneurysms after Stent-Assisted Coiling. AJNR Am J Neuroradiol 2020; 41:663-668. [PMID: 32165365 DOI: 10.3174/ajnr.a6476] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2019] [Accepted: 01/27/2020] [Indexed: 12/16/2022]
Abstract
BACKGROUND AND PURPOSE Flow-diverter treatment for previously stented aneurysms has been reported to be less effective and prone to complications. In this study, we evaluated the effectiveness and safety of flow diverters for recurrent aneurysms after stent-assisted coiling. MATERIALS AND METHODS Patients who underwent flow-diverter placement for recurrent aneurysms after stent-assisted coiling between March 2015 and March 2019 were recruited. Clinical and radiographic characteristics and clinical and angiographic outcomes were retrospectively evaluated. RESULTS Among 133 patients who underwent flow-diverter insertion, 17 (male/female ratio = 5:12; mean age, 53.8 years) were treated for recurrent aneurysms after stent placement with (n = 16) or without (n = 1) coiling. Eight patients initially presented with subarachnoid hemorrhage; 7, with headache; and 2, with visual field defects. Angiographic morphology included large/giant saccular in 12 patients, dissecting in 2, fusiform in 1, traumatic pseudoaneurysm in 1, and ruptured blood blister-like aneurysm in 1. The duration between the first treatment and flow-diverter placement ranged from 2 weeks to 15 months (median, 6 months). Flow-diverter placement was successful in all cases without any complications. All patients had favorable outcomes (mRS, 0-2), without any newly appearing symptoms. Aneurysms were followed up with conventional angiography at least once in 6-18 months. Sixteen aneurysms showed complete occlusion, and 1 aneurysm was enlarged. CONCLUSIONS Results from this case series investigating flow-diverter placement for recurrent aneurysms after stent-assisted coiling suggested that the procedure is safe and effective. Further study in a larger population may be warranted.
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Affiliation(s)
- K Y Park
- From the Department of Neurosurgery (K.Y.P., C.K.J., J.W.L., Y.B.K., J.C.), Yonsei University College of Medicine, Seoul, Republic of Korea
| | - J Y Yeon
- Department of Neurosurgery (J.Y.Y.), Sungkyunkwan University School of Medicine, Seoul, Republic of Korea
| | - B M Kim
- Department of Radiology (B.M.K., J.-H.K., D.J.K., D.H.S., H.G.P., J.S.P.), Severance Stroke Center, Severance Hospital, Yonsei University College of Medicine, Seoul, Republic of Korea
| | - P Jeon
- Department of Radiology (P.J.), Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Republic of Korea
| | - J-H Kim
- Department of Radiology (B.M.K., J.-H.K., D.J.K., D.H.S., H.G.P., J.S.P.), Severance Stroke Center, Severance Hospital, Yonsei University College of Medicine, Seoul, Republic of Korea
| | - C K Jang
- From the Department of Neurosurgery (K.Y.P., C.K.J., J.W.L., Y.B.K., J.C.), Yonsei University College of Medicine, Seoul, Republic of Korea
| | - D J Kim
- Department of Radiology (B.M.K., J.-H.K., D.J.K., D.H.S., H.G.P., J.S.P.), Severance Stroke Center, Severance Hospital, Yonsei University College of Medicine, Seoul, Republic of Korea
| | - J W Lee
- From the Department of Neurosurgery (K.Y.P., C.K.J., J.W.L., Y.B.K., J.C.), Yonsei University College of Medicine, Seoul, Republic of Korea
| | - Y B Kim
- From the Department of Neurosurgery (K.Y.P., C.K.J., J.W.L., Y.B.K., J.C.), Yonsei University College of Medicine, Seoul, Republic of Korea
| | - J Chung
- From the Department of Neurosurgery (K.Y.P., C.K.J., J.W.L., Y.B.K., J.C.), Yonsei University College of Medicine, Seoul, Republic of Korea
| | - D H Song
- Department of Radiology (B.M.K., J.-H.K., D.J.K., D.H.S., H.G.P., J.S.P.), Severance Stroke Center, Severance Hospital, Yonsei University College of Medicine, Seoul, Republic of Korea
| | - H G Park
- Department of Radiology (B.M.K., J.-H.K., D.J.K., D.H.S., H.G.P., J.S.P.), Severance Stroke Center, Severance Hospital, Yonsei University College of Medicine, Seoul, Republic of Korea
| | - J S Park
- Department of Radiology (B.M.K., J.-H.K., D.J.K., D.H.S., H.G.P., J.S.P.), Severance Stroke Center, Severance Hospital, Yonsei University College of Medicine, Seoul, Republic of Korea
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Ye BD, Kim BM, Jung S, Lee HS, Hong M, Kim K, Moon JW, Baek J, Oh EH, Hwang SW, Park SH, Yang SK, Song K. Association of FUT2 and ABO with Crohn's disease in Koreans. J Gastroenterol Hepatol 2020; 35:104-109. [PMID: 31260595 DOI: 10.1111/jgh.14766] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/29/2019] [Revised: 05/14/2019] [Accepted: 06/16/2019] [Indexed: 12/23/2022]
Abstract
BACKGROUND AND AIM Fucosyltransferase 2 (FUT2) at 19q13 is a well-established susceptibility locus for Crohn's disease (CD) in Caucasians. FUT2 encodes α-1,2-fucosyltransferase that regulates the secretion of the α-1-2-N-acetylgalactosaminyltransferase and α-1-3-galactosyltransferase (ABO) antigens in both the gastrointestinal mucosa and secretory glands. Given that CD is thought to arise from dysregulated mucosal immune responses to the gut flora and both the ABO blood group and the FUT2 secretor status affect the composition of the gut microbiota, the goal of this study was to evaluate the associations of variants of FUT2 and ABO with CD in Koreans. METHODS Three single-nucleotide polymorphisms from the FUT2 and ABO genes were genotyped in 1735 patients with CD and 8074 healthy controls. RESULTS The FUT2 non-secretor allele showed genome-wide significant association with CD in Koreans (rs1047781, odds ratio [OR] = 1.30, Pcombined = 3.52 × 10-12 ). The ABO locus showed genome-wide significant association with CD in Asians (Pmeta = 2.35 × 10-8 ). A moderate association was observed with the A and B groups (OR = 1.40, P = 2.26 × 10-6 ; and OR = 1.32, P = 1.92 × 10-4 , respectively) compared with the O group. Following stratification on the basis of FUT2 genotype, carriers of the secretor O blood group were significantly protective against CD than were those of the secretor non-O blood group (OR = 0.63, 95% confidence interval = 0.54-0.73, P = 2.86 × 10-9 ). CONCLUSIONS These are the first results indicating that the O blood group and FUT2 secretor status are protective factors against CD in Asians.
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Affiliation(s)
- Byong Duk Ye
- Department of Gastroenterology and Inflammatory Bowel Disease Center, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea
| | - Byoung Mok Kim
- Department of Biochemistry and Molecular Biology, University of Ulsan College of Medicine, Seoul, Korea
| | - Seulgi Jung
- Department of Biochemistry and Molecular Biology, University of Ulsan College of Medicine, Seoul, Korea
| | - Ho-Su Lee
- Department of Biochemistry and Molecular Biology, University of Ulsan College of Medicine, Seoul, Korea
| | - Myunghee Hong
- Department of Biochemistry and Molecular Biology, University of Ulsan College of Medicine, Seoul, Korea
| | - Kihyun Kim
- Department of Biochemistry and Molecular Biology, University of Ulsan College of Medicine, Seoul, Korea
| | - Jung Won Moon
- Department of Biochemistry and Molecular Biology, University of Ulsan College of Medicine, Seoul, Korea
| | - Jiwon Baek
- Department of Biochemistry and Molecular Biology, University of Ulsan College of Medicine, Seoul, Korea
| | - Eun Hye Oh
- Department of Gastroenterology and Inflammatory Bowel Disease Center, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea
| | - Sung Wook Hwang
- Department of Gastroenterology and Inflammatory Bowel Disease Center, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea
| | - Sang Hyoung Park
- Department of Gastroenterology and Inflammatory Bowel Disease Center, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea
| | - Suk-Kyun Yang
- Department of Gastroenterology and Inflammatory Bowel Disease Center, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea
| | - Kyuyoung Song
- Department of Biochemistry and Molecular Biology, University of Ulsan College of Medicine, Seoul, Korea
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Park SH, Hong M, Lee HS, Ye BD, Hwang SW, Jung S, Baek J, Moon JW, Kim BM, Oh SH, Kim KM, Lee I, Im CN, Liu J, McGovern DPB, Yang SK, Song K. Association of TRAP1 with infliximab-induced mucosal healing in Crohn's disease. J Gastroenterol Hepatol 2019; 34:2118-2125. [PMID: 31039275 DOI: 10.1111/jgh.14696] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [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: 12/10/2018] [Revised: 04/19/2019] [Accepted: 04/23/2019] [Indexed: 12/20/2022]
Abstract
BACKGROUND AND AIM Anti-tumor necrosis factor (TNF) agents, such as infliximab (IFX), have been increasingly used to induce and maintain disease remission in patients with Crohn's disease (CD). Despite a considerable non-response rate, little is known about the genetic predictors of response to anti-TNF therapy in CD. Our aim in this study was to investigate the genetic factors associated with response to anti-TNF therapy in patients with CD. METHODS We performed a two-stage genome-wide association study (GWAS) to identify loci influencing the response to IFX among Korean patients with CD, comprising 42 good responders with mucosal healing and 70 non-responders. The achievement of mucosal healing was assessed by endoscopy and imaging. The functional significance of TRAP1 (TNF receptor associated protein 1) was examined using dextran sodium sulfate-induced colitis model in TRAP1 transgenic mice. RESULTS The GWAS identified rs2158962, an intronic single nucleotide polymorphism (SNP) of TRAP1, significantly associated with mucosal healing (odds ratio = 4.94; Pcombined = 1.35 × 10-7 ). In the dextran sodium sulfate-induced acute colitis, TRAP1 transgenic mice showed a better response to IFX than the wild-type mice. CONCLUSIONS The TRAP1 gene is associated with mucosal healing in CD patients following IFX therapy. Identifying the genetic predictors of mucosal healing to anti-TNF therapy can prevent patients from exposure to ineffective therapies.
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Affiliation(s)
- Sang Hyoung Park
- Department of Gastroenterology, Asan Medical Center, Seoul, Korea
| | - Myunghee Hong
- Department of Biochemistry and Molecular Biology, University of Ulsan College of Medicine, Seoul, Korea
| | - Ho-Su Lee
- Department of Biochemistry and Molecular Biology, University of Ulsan College of Medicine, Seoul, Korea
| | - Byong Duk Ye
- Department of Gastroenterology, Asan Medical Center, Seoul, Korea
| | - Sung Wook Hwang
- Department of Gastroenterology, Asan Medical Center, Seoul, Korea
| | - Seulgi Jung
- Department of Biochemistry and Molecular Biology, University of Ulsan College of Medicine, Seoul, Korea
| | - Jiwon Baek
- Department of Biochemistry and Molecular Biology, University of Ulsan College of Medicine, Seoul, Korea
| | - Jung Won Moon
- Department of Biochemistry and Molecular Biology, University of Ulsan College of Medicine, Seoul, Korea
| | - Byoung Mok Kim
- Department of Biochemistry and Molecular Biology, University of Ulsan College of Medicine, Seoul, Korea
| | - Seak Hee Oh
- Department of Pediatrics, Asan Medical Center Children's Hospital, Seoul, Korea
| | - Kyung Mo Kim
- Department of Pediatrics, Asan Medical Center Children's Hospital, Seoul, Korea
| | - Inchul Lee
- Department of Pathology, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea
| | - Chang-Nim Im
- Department of Biochemistry, Institute for Aging and Metabolic Diseases, Cancer Evolution Center, College of Medicine, The Catholic University of Korea, Seoul, Korea
| | - Jianjun Liu
- Human Genetics Group, Genome Institute of Singapore, Singapore
| | - Dermot P B McGovern
- The F. Widjaja Foundation Inflammatory Bowel and Immunobiology Research Institute, Cedars-Sinai Medical Center, Los Angeles, California, USA
| | - Suk-Kyun Yang
- Department of Gastroenterology, Asan Medical Center, Seoul, Korea
| | - Kyuyoung Song
- Department of Biochemistry and Molecular Biology, University of Ulsan College of Medicine, Seoul, Korea
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Lee HS, Kim K, Jung S, Hong M, Kim BM, Yoo DS, Moon JW, Baek J, Hwang SW, Park SH, Yang SK, Han B, Song K, Ye BD. Effects of smoking on the association of human leukocyte antigen with ulcerative colitis. J Gastroenterol Hepatol 2019; 34:1777-1783. [PMID: 31038770 DOI: 10.1111/jgh.14695] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [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: 02/14/2019] [Revised: 04/16/2019] [Accepted: 04/17/2019] [Indexed: 12/13/2022]
Abstract
BACKGROUND AND AIM Tobacco smoking is a risk factor for gastrointestinal disorders, causing mucosal damage and impairing immune responses. However, smoking has been found to be protective against ulcerative colitis (UC). Human leukocyte antigen (HLA) is a major susceptibility locus for UC, and HLA-DRB1*15:02 has the strongest effect in Asians. This study investigated the effects of smoking on the association between HLA and UC. METHODS The study enrolled 882 patients with UC, including 526 never, 151 current, and 205 former smokers, and 3091 healthy controls, including 2124 never, 502 current, and 465 former smokers. Smoking-stratified analyses of HLA data were performed using a case-control approach. RESULTS In a case-control approach, HLA-DRB1*15:02 was associated with UC in never smokers (ORnever smokers = 3.20, Pnever smokers = 7.88 × 10-23 ) but not in current or former smokers (Pcurrent smokers = 0.72 and Pformer smokers = 0.33, respectively). In current smokers, HLA-DQB1*06 was associated with UC (ORcurrent smokers = 2.59, Pcurrent smokers = 6.39 × 10-12 ). No variants reached genome-wide significance in former smokers. CONCLUSIONS An association between UC and HLA-DRB1*15:02 was limited to never smokers. Our findings highlight that tobacco smoking modifies the effects of HLA on the risk of UC.
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Affiliation(s)
- Ho-Su Lee
- Department of Biochemistry and Molecular Biology, University of Ulsan College of Medicine, Seoul, Republic of Korea.,Stem Cell Immunomodulation Research Center, University of Ulsan College of Medicine, Seoul, Republic of Korea
| | - Kihyun Kim
- Department of Biochemistry and Molecular Biology, University of Ulsan College of Medicine, Seoul, Republic of Korea
| | - Seulgi Jung
- Department of Biochemistry and Molecular Biology, University of Ulsan College of Medicine, Seoul, Republic of Korea
| | - Myunghee Hong
- Department of Biochemistry and Molecular Biology, University of Ulsan College of Medicine, Seoul, Republic of Korea
| | - Byoung Mok Kim
- Department of Biochemistry and Molecular Biology, University of Ulsan College of Medicine, Seoul, Republic of Korea
| | - Dae-Sung Yoo
- Division of Veterinary Epidemiology, Animal and Plant Quarantine Agency, Ministry of Agriculture Food and Rural Affair, Gimcheon, Republic of Korea
| | - Jung Won Moon
- Department of Biochemistry and Molecular Biology, University of Ulsan College of Medicine, Seoul, Republic of Korea
| | - Jiwon Baek
- Department of Biochemistry and Molecular Biology, University of Ulsan College of Medicine, Seoul, Republic of Korea
| | - Sung Wook Hwang
- Department of Gastroenterology and Inflammatory Bowel Disease Center, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Republic of Korea
| | - Sang Hyoung Park
- Department of Gastroenterology and Inflammatory Bowel Disease Center, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Republic of Korea
| | - Suk-Kyun Yang
- Department of Gastroenterology and Inflammatory Bowel Disease Center, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Republic of Korea
| | - Buhm Han
- Department of Medicine, Seoul National University College of Medicine, Seoul, Republic of Korea
| | - Kyuyoung Song
- Department of Biochemistry and Molecular Biology, University of Ulsan College of Medicine, Seoul, Republic of Korea
| | - Byong Duk Ye
- Department of Gastroenterology and Inflammatory Bowel Disease Center, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Republic of Korea
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Jeong DE, Kim JW, Kim BM, Hwang W, Kim DJ. Impact of Balloon-Guiding Catheter Location on Recanalization in Patients with Acute Stroke Treated by Mechanical Thrombectomy. AJNR Am J Neuroradiol 2019; 40:840-844. [PMID: 30948374 DOI: 10.3174/ajnr.a6031] [Citation(s) in RCA: 12] [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] [Subscribe] [Scholar Register] [Received: 12/28/2018] [Accepted: 03/07/2019] [Indexed: 11/07/2022]
Abstract
BACKGROUND AND PURPOSE Mechanical thrombectomy with proximal flow control and forced aspiration may improve the outcome of endovascular revascularization therapy for patients with acute stroke. The purpose of this study was to compare the impact of balloon-guiding catheter locations in patients treated for anterior circulation acute ischemic stroke using mechanical thrombectomy. MATERIALS AND METHODS The influence of the balloon-guiding catheter location (proximal, balloon-guiding catheter tip proximal to C1 vertebral body; distal, between the skull base and the C1 vertebral body) was analyzed in patients with acute anterior circulation stroke treated with stent-retriever thrombectomy. The baseline angiographic/clinical characteristics, time intervals, recanalization rates, and clinical outcomes were compared. RESULTS The clinical analysis included 102 patients (mean age, 69.5 ± 12.8 years; male/female ratio = 52:50). The balloon-guiding catheter was located distally in 49 patients and proximally in 53 patients for flow control and forced aspiration during stent retrieval. The puncture-to-recanalization time was shorter in the distal group than in the proximal group (40 versus 56 minutes, P = .02). Successful and complete recanalizations were more frequently achieved in the distal group compared with the proximal group (98.0% versus 75.5%. P = .003; 67.3% versus 45.3%, P = .04, respectively). Multivariate analysis showed that the distal catheterization location was independently associated with successful recanalization (adjusted OR, 13.4; 95% CI, 2.4-254.8; P = .02). CONCLUSIONS Location of the balloon-guiding catheter has a significant impact on recanalization in patients with acute stroke. The balloon-guiding catheter should be positioned as distally as safely possible in the cervical ICA for maximally effective thrombectomy.
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Affiliation(s)
- D E Jeong
- From the Department of Radiology (D.E.J., J.W.K., B.M.K., D.J.K.), Yonsei University College of Medicine, Severance Hospital, Seoul, South Korea
- Department of Neurology (D.E.J.), YeongNam University College of Medicine, Daegu, South Korea
| | - J W Kim
- From the Department of Radiology (D.E.J., J.W.K., B.M.K., D.J.K.), Yonsei University College of Medicine, Severance Hospital, Seoul, South Korea
| | - B M Kim
- From the Department of Radiology (D.E.J., J.W.K., B.M.K., D.J.K.), Yonsei University College of Medicine, Severance Hospital, Seoul, South Korea
| | - W Hwang
- Department of Mechanical and Aerospace Engineering (W.H.), Seoul National University, Seoul, South Korea
| | - D J Kim
- From the Department of Radiology (D.E.J., J.W.K., B.M.K., D.J.K.), Yonsei University College of Medicine, Severance Hospital, Seoul, South Korea
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Saposnik G, Wilson A, Almekhlafi M, Kashani N, Kunz W, Baxter B, Pillai S, Campbell B, Michell P, Fisher U, Rabinstein A, Yoshimura S, Heo JH, Kim BM, Cherian M, Turjman F, Foss M, Hill MD, Menon B, Goyal M. Abstract WP4: Which Characteristics Determine the Decision to Proceed With Endovascular Therapy in Acute Stroke Patients: Results From an International Multidisciplinary Study. Stroke 2019. [DOI: 10.1161/str.50.suppl_1.wp4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Introduction:
The current management of acute ischemic stroke has changed recently with the publication of randomized trials using endovascular therapy (EVT).
Rationale/Hypothesis:
Limited information is however available on how physicians make decisions regarding patient selection for endovascular therapy (EVT) in the real-world.
Methods:
We conducted an international web-based cross-sectional survey of stroke physicians and interventionalists to assess the decision to offer EVT. Part 1 of the survey used hierarchical Bayes’ disaggregate discrete choice modelling to analyze ten pairs of patient scenarios, randomly generated from ten key patient characteristics to have respondents choose which scenario was best suited for EVT in their practice. Part 2 of the survey used mixed effects logistic regression modelling to analyze 22 randomly chosen patient scenarios, again randomly generated from several key patient and hospital level characteristics.
Results:
607 physicians [mean age of 44 (SD 8.5) years, 83.5% men, 53.6% neurologists, 28.7% neuro-interventionists, 13.3% neurosurgeons, 4.7% other], from 38 countries participated. Using disaggregate discrete choice analysis, the most influential characteristic in deciding about EVT was the extent of ischemic change (ASPECTS)/volume of infarct core (26-28% of the choice). Patient age, premorbid status, baseline NIHSS score, and occlusion location (13-15% each) were the other relevant characteristics. Using mixed effects logistic regression, baseline stroke severity (NIHSS> 15 vs. NIHSS 0-5, OR 6.7; 95% CI 4.8-9.5), ASPECTS (5-7 vs. 0-4, OR 9.4; 95% CI7.4-11.9) and occlusion location (distal M2 vs. ICA/M1, OR 012; 95% CI 0.08-0.17) were the most relevant characteristics in deciding about EVT. Time from stroke onset, sex, comorbidities, time of day (off hours vs. day time) were all less relevant in deciding about EVT in both analyses.
Conclusion:
Severity of stroke assessed clinically, and extent of brain infarction and location of thrombus assessed on imaging are the dominant characteristics that treating physicians use in the real world when deciding about EVT for patients with an acute ischemic stroke.
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Affiliation(s)
| | | | | | | | | | - Blaise Baxter
- St Michael's Hosp - Univ of Toronto, Toronto, Canada
| | - Silaja Pillai
- Dept of Neurology, Sree Chitra Tirunal Institute for Med Sciences and Technology, Trivandrum, India
| | | | | | | | | | | | - Ji Hoe Heo
- Yonsei Univ, Seoul, Korea, Democratic People's Republic of
| | - BM Kim
- Yonsei Univ, Seoul, Korea, Democratic People's Republic of
| | - Matthew Cherian
- Sri Chitra Tirunal Institiute of Med Sciences, Trivandrum, India
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Román LS, Menon BK, Blasco J, Hernández-Pérez M, Dávalos A, Majoie CBLM, Campbell BCV, Guillemin F, Lingsma H, Anxionnat R, Epstein J, Saver JL, Marquering H, Wong JH, Lopes D, Reimann G, Desal H, Dippel DWJ, Coutts S, du Mesnil de Rochemont R, Yavagal D, Ferre JC, Roos YBWEM, Liebeskind DS, Lenthall R, Molina C, Al Ajlan FS, Reddy V, Dowlatshahi D, Sourour NA, Oppenheim C, Mitha AP, Davis SM, Weimar C, van Oostenbrugge RJ, Cobo E, Kleinig TJ, Donnan GA, van der Lugt A, Demchuk AM, Berkhemer OA, Boers AMM, Ford GA, Muir KW, Brown BS, Jovin T, van Zwam WH, Mitchell PJ, Hill MD, White P, Bracard S, Goyal M, Berkhemer OA, Fransen PSS, Beumer D, van den Berg LA, Lingsma HF, Yoo AJ, Schonewille WJ, Vos JA, Nederkoorn PJ, Wermer MJH, van Walderveen MAA, Staals J, Hofmeijer J, van Oostayen JA, Lycklama à Nijeholt GJ, Boiten J, Brouwer PA, Emmer BJ, de Bruijn SF, van Dijk LC, Kappelle J, Lo RH, van Dijk EJ, de Vries J, de Kort PL, van Rooij WJJ, van den Berg JS, van Hasselt BA, Aerden LA, Dallinga RJ, Visser MC, Bot JC, Vroomen PC, Eshghi O, Schreuder TH, Heijboer RJ, Keizer K, Tielbeek AV, den Hertog HM, Gerrits DG, van den Berg-Vos RM, Karas GB, Steyerberg EW, Flach Z, Marquering HA, Sprengers ME, Jenniskens SF, Beenen LF, Zech M, Kowarik M, Seifert C, Schwaiger B, Puri A, Hou S, Wakhloo A, Moonis M, Henniger N, Goddeau R, van den Berg R, Massari F, Minaeian A, Lozano JD, Ramzan M, Stout C, Patel A, Tunguturi A, Onteddu S, Carandang R, Howk M, Koudstaal PJ, Ribó M, Sanjuan E, Rubiera M, Pagola J, Flores A, Muchada M, Meler P, Huerga E, Gelabert S, Coscojuela P, van Zwam WH, Tomasello A, Rodriguez D, Santamarina E, Maisterra O, Boned S, Seró L, Rovira A, Molina CA, Millán M, Muñoz L, Roos YB, Pérez de la Ossa N, Gomis M, Dorado L, López-Cancio E, Palomeras E, Munuera J, García Bermejo P, Remollo S, Castaño C, García-Sort R, van der Lugt A, Cuadras P, Puyalto P, Hernández-Pérez M, Jiménez M, Martínez-Piñeiro A, Lucente G, Dávalos A, Chamorro A, Urra X, Obach V, van Oostenbrugge RJ, Cervera A, Amaro S, Llull L, Codas J, Balasa M, Navarro J, Ariño H, Aceituno A, Rudilosso S, Renu A, Majoie CB, Macho JM, San Roman L, Blasco J, López A, Macías N, Cardona P, Quesada H, Rubio F, Cano L, Lara B, Dippel DW, de Miquel MA, Aja L, Serena J, Cobo E, Albers GW, Lees KR, Arenillas J, Roberts R, Minhas P, Al-Ajlan F, Brown MM, Salluzzi M, Zimmel L, Patel S, Eesa M, Martí-Fàbregas J, Jankowitz B, Serena J, Salvat-Plana M, López-Cancio E, Bracard S, Liebig T, Ducrocq X, Anxionnat R, Baillot PA, Barbier C, Derelle AL, Lacour JC, Richard S, Samson Y, Sourour N, Baronnet-Chauvet F, Stijnen T, Clarencon F, Crozier S, Deltour S, Di Maria F, Le Bouc R, Leger A, Mutlu G, Rosso C, Szatmary Z, Yger M, Andersson T, Zavanone C, Bakchine S, Pierot L, Caucheteux N, Estrade L, Kadziolka K, Leautaud A, Renkes C, Serre I, Desal H, Mattle H, Guillon B, Boutoleau-Bretonniere C, Daumas-Duport B, De Gaalon S, Derkinderen P, Evain S, Herisson F, Laplaud DA, Lebouvier T, Lintia-Gaultier A, Wahlgren N, Pouclet-Courtemanche H, Rouaud T, Rouaud Jaffrenou V, Schunck A, Sevin-Allouet M, Toulgoat F, Wiertlewski S, Gauvrit JY, Ronziere T, Cahagne V, van der Heijden E, Ferre JC, Pinel JF, Raoult H, Mas JL, Meder JF, Al Najjar-Carpentier AA, Birchenall J, Bodiguel E, Calvet D, Domigo V, Ghannouti N, Godon-Hardy S, Guiraud V, Lamy C, Majhadi L, Morin L, Naggara O, Trystram D, Turc G, Berge J, Sibon I, Fleitour N, Menegon P, Barreau X, Rouanet F, Debruxelles S, Kazadi A, Renou P, Fleury O, Pasco-Papon A, Dubas F, Caroff J, Hooijenga I, Godard Ducceschi S, Hamon MA, Lecluse A, Marc G, Giroud M, Ricolfi F, Bejot Y, Chavent A, Gentil A, Kazemi A, Puppels C, Osseby GV, Voguet C, Mahagne MH, Sedat J, Chau Y, Suissa L, Lachaud S, Houdart E, Stapf C, Buffon Porcher F, Pellikaan W, Chabriat H, Guedin P, Herve D, Jouvent E, Mawet J, Saint-Maurice JP, Schneble HM, Turjman F, Nighoghossian N, Berhoune NN, Geerling A, Bouhour F, Cho TH, Derex L, Felix S, Gervais-Bernard H, Gory B, Manera L, Mechtouff L, Ritzenthaler T, Riva R, Lindl-Velema A, Salaris Silvio F, Tilikete C, Blanc R, Obadia M, Bartolini MB, Gueguen A, Piotin M, Pistocchi S, Redjem H, Drouineau J, van Vemde G, Neau JP, Godeneche G, Lamy M, Marsac E, Velasco S, Clavelou P, Chabert E, Bourgois N, Cornut-Chauvinc C, Ferrier A, de Ridder A, Gabrillargues J, Jean B, Marques AR, Vitello N, Detante O, Barbieux M, Boubagra K, Favre Wiki I, Garambois K, Tahon F, Greebe P, Ashok V, Voguet C, Coskun O, Guedin P, Rodesch G, Lapergue B, Bourdain F, Evrard S, Graveleau P, Decroix JP, de Bont-Stikkelbroeck J, Wang A, Sellal F, Ahle G, Carelli G, Dugay MH, Gaultier C, Lebedinsky AP, Lita L, Musacchio RM, Renglewicz-Destuynder C, de Meris J, Tournade A, Vuillemet F, Montoro FM, Mounayer C, Faugeras F, Gimenez L, Labach C, Lautrette G, Denier C, Saliou G, Janssen K, Chassin O, Dussaule C, Melki E, Ozanne A, Puccinelli F, Sachet M, Sarov M, Bonneville JF, Moulin T, Biondi A, Struijk W, De Bustos Medeiros E, 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VA, Lanthier S, Odier C, Durocher A, Raymond J, Weill A, Daneault N, Deschaintre Y, Jankowitz B, Baxendell L, Massaro L, Jackson-Graves C, Decesare S, Porter P, Armbruster K, Adams A, Billigan J, Oakley J, Ducruet A, Jadhav A, Giurgiutiu DV, Aghaebrahim A, Reddy V, Hammer M, Starr M, Totoraitis V, Wechsler L, Streib S, Rangaraju S, Campbell D, Rocha M, Gulati D, Silver FL, Krings T, Kalman L, Cayley A, Williams J, Stewart T, Wiegner R, Casaubon LK, Jaigobin C, del Campo JM, Elamin E, Schaafsma JD, Willinsky RA, Agid R, Farb R, ter Brugge K, Sapkoda BL, Baxter BW, Barton K, Knox A, Porter A, Sirelkhatim A, Devlin T, Dellinger C, Pitiyanuvath N, Patterson J, Nichols J, Quarfordt S, Calvert J, Hawk H, Fanale C, Frei DF, Bitner A, Novak A, Huddle D, Bellon R, Loy D, Wagner J, Chang I, Lampe E, Spencer B, Pratt R, Bartt R, Shine S, Dooley G, Nguyen T, Whaley M, McCarthy K, Teitelbaum J, Tampieri D, Poon W, Campbell N, Cortes M, Dowlatshahi D, Lum C, Shamloul R, Robert S, Stotts G, Shamy M, 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Kim BM, Kim YD, Song D, Lee KJ, Yoo J, Bang OY, Rho S, Lee J, Jeon P, Kim KH, Cha J, Kim SJ, Ryoo S, Lee MJ, Sohn SI, Kim CH, Ryu HG, Hong JH, Chang HW, Lee CY, Rha J, Davis SM, Donnan GA, Campbell BCV, Mitchell PJ, Churilov L, Yan B, Dowling R, Yassi N, Oxley TJ, Wu TY, Silver G, McDonald A, McCoy R, Kleinig TJ, Scroop R, Dewey HM, Simpson M, Brooks M, Coulton B, Krause M, Harrington TJ, Steinfort B, Faulder K, Priglinger M, Day S, Phan T, Chong W, Holt M, Chandra RV, Ma H, Young D, Wong K, Wijeratne T, Tu H, Mackay E, Celestino S, Bladin CF, Loh PS, Gilligan A, Ross Z, Coote S, Frost T, Parsons MW, Miteff F, Levi CR, Ang T, Spratt N, Kaauwai L, Badve M, Rice H, de Villiers L, Barber PA, McGuinness B, Hope A, Moriarty M, Bennett P, Wong A, Coulthard A, Lee A, Jannes J, Field D, Sharma G, Salinas S, Cowley E, Snow B, Kolbe J, Stark R, King J, Macdonnell R, Attia J, D'Este C, Saver JL, Goyal M, Diener HC, Levy EI, Bonafé A, Mendes Pereira V, Jahan R, Albers GW, Cognard C, Cohen DJ, Hacke W, Jansen O, Jovin TG, Mattle HP, Nogueira RG, Siddiqui AH, Yavagal DR, von Kummer R, Smith W, Turjman F, Hamilton S, Chiacchierini R, Amar A, Sanossian N, Loh Y, Devlin T, Baxter B, Hawk H, Sapkota B, Quarfordt S, Sirelkhatim A, Dellinger C, Barton K, Reddy VK, Ducruet A, Jadhav A, Horev A, Giurgiutiu DV, Totoraitis V, Hammer M, Jankowitz B, Wechsler L, Rocha M, Gulati D, Campbell D, Star M, Baxendell L, Oakley J, Siddiqui A, Hopkins LN, Snyder K, Sawyer R, Hall S, Costalat V, Riquelme C, Machi P, Omer E, Arquizan C, Mourand I, Charif M, Ayrignac X, Menjot de Champfleur N, Leboucq N, Gascou G, Moynier M, du Mesnil de Rochemont R, Singer O, Berkefeld J, Foerch C, Lorenz M, Pfeilschifer W, Hattingen E, Wagner M, You SJ, Lescher S, Braun H, Dehkharghani S, Belagaje SR, Anderson A, Lima A, Obideen M, Haussen D, Dharia R, Frankel M, Patel V, Owada K, Saad A, Amerson L, Horn C, Doppelheuer S, Schindler K, Lopes DK, Chen M, Moftakhar R, Anton C, Smreczak M, Carpenter JS, Boo S, Rai A, 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Wortmann G, Starkman S, Duckwiler G, Jahan R, Rao N, Sheth S, Ng K, Noorian A, Szeder V, Nour M, McManus M, Huang J, Tarpley J, Tateshima S, Gonzalez N, Ali L, Liebeskind D, Hinman J, Calderon-Arnulphi M, Liang C, Guzy J, Koch S, DeSousa K, Gordon-Perue G, Haussen D, Elhammady M, Peterson E, Pandey V, Dharmadhikari S, Khandelwal P, Malik A, Pafford R, Gonzalez P, Ramdas K, Andersen G, Damgaard D, Von Weitzel-Mudersbach P, Simonsen C, Ruiz de Morales Ayudarte N, Poulsen M, Sørensen L, Karabegovich S, Hjørringgaard M, Hjort N, Harbo T, Sørensen K, Deshaies E, Padalino D, Swarnkar A, Latorre JG, Elnour E, El-Zammar Z, Villwock M, Farid H, Balgude A, Cross L, Hansen K, Holtmannspötter M, Kondziella D, Hoejgaard J, Taudorf S, Soendergaard H, Wagner A, Cronquist M, Stavngaard T, Cortsen M, Krarup LH, Hyldal T, Haring HP, Guggenberger S, Hamberger M, Trenkler J, Sonnberger M, Nussbaumer K, Dominger C, Bach E, Jagadeesan BD, Taylor R, Kim J, Shea K, Tummala R, Zacharatos H, Sandhu D, Ezzeddine M, Grande A, Hildebrandt D, Miller K, Scherber J, Hendrickson A, Jumaa M, Zaidi S, Hendrickson T, Snyder V, Killer-Oberpfalzer M, Mutzenbach J, Weymayr F, Broussalis E, Stadler K, Jedlitschka A, Malek A, Mueller-Kronast N, Beck P, Martin C, Summers D, Day J, Bettinger I, Holloway W, Olds K, Arkin S, Akhtar N, Boutwell C, Crandall S, Schwartzman M, Weinstein C, Brion B, Prothmann S, Kleine J, Kreiser K, Boeckh-Behrens T, Poppert H, Wunderlich S, Koch ML, Biberacher V, Huberle A, Gora-Stahlberg G, Knier B, Meindl T, Utpadel-Fischler D. Imaging features and safety and efficacy of endovascular stroke treatment: a meta-analysis of individual patient-level data. Lancet Neurol 2018; 17:895-904. [DOI: 10.1016/s1474-4422(18)30242-4] [Citation(s) in RCA: 213] [Impact Index Per Article: 35.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2018] [Revised: 06/11/2018] [Accepted: 06/12/2018] [Indexed: 11/29/2022]
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Lee HS, Yang SK, Hong M, Jung S, Kim BM, Moon JW, Park SH, Ye BD, Oh SH, Kim KM, Yoon YS, Yu CS, Baek J, Lee CH, Han B, Liu J, Haritunians T, McGovern DPB, Song K. An Intergenic Variant rs9268877 Between HLA-DRA and HLA-DRB Contributes to the Clinical Course and Long-term Outcome of Ulcerative Colitis. J Crohns Colitis 2018; 12:1113-1121. [PMID: 29905830 DOI: 10.1093/ecco-jcc/jjy080] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [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: 01/10/2018] [Revised: 04/30/2018] [Accepted: 06/12/2018] [Indexed: 01/01/2023]
Abstract
BACKGROUND AND AIMS The genetic contribution to the prognosis of ulcerative colitis [UC] is poorly understood, and most currently known susceptibility loci are not associated with prognosis. To identify genetic variants influencing the prognosis of UC, we performed an Immunochip-based study using an extreme phenotype approach. METHODS Based on the finding that the only association, Pdiscovery-meta <1 × 10-4, was located in the human leukocyte antigen [HLA], we focused our analyses on the HLA region. We performed the analysis using HLA imputation data from three independent discovery cohorts of 607 UC patients [243 poor-prognosis and 364 good-prognosis], followed by replication in 274 UC patients [145 poor-prognosis and 129 good-prognosis]. RESULTS We found that rs9268877, located between HLA-DRA and HLA-DRB, was associated with poor-prognosis of UC at genome-wide significance (odds ratio [ORdiscovery] = 1.82; ORreplication = 1.55; ORcombined-meta = 1.72, pcombined-meta = 1.04 × 10-8), with effect size [OR] increasing incrementally according to worsening of prognosis in each of the three independent discovery cohorts and the replication cohort. However, rs9268877 showed no association with UC susceptibility [ORcombined-meta = 1.07, pcombined-meta = 0.135]; rs9268877 influenced 30-year clinical outcomes, and the presence of the rs9268877 risk allele had a sensitivity of 80.0% and specificity of 38.1% for colectomy. CONCLUSIONS Our results provide new insights into prognosis-associated genetic variation in UC, which appears to be distinct from the genetic contribution to disease susceptibility. These findings could be useful in identifying poor-prognosis patients who might benefit from early aggressive therapy.
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Affiliation(s)
- Ho-Su Lee
- Department of Biochemistry and Molecular Biology, University of Ulsan College of Medicine, Seoul, Korea
| | - Suk-Kyun Yang
- Department of Gastroenterology, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea
| | - Myunghee Hong
- Department of Biochemistry and Molecular Biology, University of Ulsan College of Medicine, Seoul, Korea
| | - Seulgi Jung
- Department of Biochemistry and Molecular Biology, University of Ulsan College of Medicine, Seoul, Korea
| | - Byoung Mok Kim
- Department of Biochemistry and Molecular Biology, University of Ulsan College of Medicine, Seoul, Korea
| | - Jung Won Moon
- Department of Biochemistry and Molecular Biology, University of Ulsan College of Medicine, Seoul, Korea
| | - Sang Hyoung Park
- Department of Gastroenterology, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea
| | - Byong Duk Ye
- Department of Gastroenterology, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea
| | - Seak Hee Oh
- Department of Pediatrics, Asan Medical Center Children's Hospital, University of Ulsan College of Medicine, Seoul, Korea
| | - Kyung Mo Kim
- Department of Pediatrics, Asan Medical Center Children's Hospital, University of Ulsan College of Medicine, Seoul, Korea
| | - Yong Sik Yoon
- Colon and Rectal Surgery, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea
| | - Chang Sik Yu
- Colon and Rectal Surgery, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea
| | - Jiwon Baek
- Department of Biochemistry and Molecular Biology, University of Ulsan College of Medicine, Seoul, Korea
| | - Cue Hyunkyu Lee
- Department of Convergence Medicine, University of Ulsan College of Medicine & Asan Institute for Life Sciences, Asan Medical Center, Seoul, Korea
| | - Buhm Han
- Department of Convergence Medicine, University of Ulsan College of Medicine & Asan Institute for Life Sciences, Asan Medical Center, Seoul, Korea
| | - Jianjun Liu
- Human Genetics Group, Genome Institute of Singapore, Singapore.,Saw Swee Hock School of Public Health, National University of Singapore, Singapore.,Yong Loo Lin School of Medicine, National University of Singapore, Singapore
| | - Talin Haritunians
- F. Widjaja Foundation Inflammatory Bowel and Immunobiology Research Institute, Cedars-Sinai Medical Center, Los Angeles, CA, USA
| | - Dermot P B McGovern
- F. Widjaja Foundation Inflammatory Bowel and Immunobiology Research Institute, Cedars-Sinai Medical Center, Los Angeles, CA, USA
| | - Kyuyoung Song
- Department of Biochemistry and Molecular Biology, University of Ulsan College of Medicine, Seoul, Korea
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12
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Hong M, Ye BD, Yang SK, Jung S, Lee HS, Kim BM, Lee SB, Hong J, Baek J, Park SH, Han B, Li Y, Liu W, Haritunians T, Taylor KD, Rotter JI, Bang SY, Kim TH, McGovern DPB, Liu J, Song K. Immunochip Meta-Analysis of Inflammatory Bowel Disease Identifies Three Novel Loci and Four Novel Associations in Previously Reported Loci. J Crohns Colitis 2018; 12:730-741. [PMID: 29584801 PMCID: PMC6279085 DOI: 10.1093/ecco-jcc/jjy002] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [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: 02/12/2017] [Accepted: 03/16/2018] [Indexed: 12/12/2022]
Abstract
BACKGROUND AND AIMS Recent meta-analysis of genome-wide association studies have identified over 241 inflammatory bowel disease susceptibility loci. However, the known variants only account for a fraction of inflammatory bowel disease heritability. To identify additional susceptibility loci, we performed a trans-ethnic meta-analysis as well as an Asian-specific meta-analysis, using all published Immunochip association results of inflammatory bowel disease. METHODS An inverse-variance fixed-effects meta-analysis was carried out across Korean and East Asian Immunochip datasets of 4156 cases and 4904 controls [Asian ancestry]. A trans-ethnic meta-analysis of inflammatory bowel disease was performed together with the European datasets of 38 155 cases and 48 485 controls genotyped on the immunochip using a Bayesian approach, Meta-Analysis of Trans-ethnic Association studies [MANTRA]. RESULTS We identified seven novel associations, including three novel susceptibility loci at MYO10-BASP1, PPP2R3C/KIAA0391/PSMA6/NFKB1A and LRRK1 as well as four novel secondary associations within previously known loci at NCF4, TSPAN32, CIITA and VANGL2. The new loci further implicate alterations in B cell biology in Crohn's disease pathogenesis. The effects of five loci were universal across European and Asian ancestries, whereas the NCF4 and CIITA loci showed significant heterogeneity between European and East Asian populations. In addition, 103 previously known IBD loci showed supporting evidence of association with nominal significance [p < 0.05] in Asians. CONCLUSIONS Our findings of new loci not previously associated with IBD support the importance of studying inflammatory bowel disease genetics in diverse populations.
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Affiliation(s)
- Myunghee Hong
- Department of Biochemistry and Molecular Biology, University of Ulsan College
of Medicine, Seoul, Korea
| | - Byong Duk Ye
- Department of Gastroenterology, Asan Medical Center, University of Ulsan
College of Medicine, Seoul, Korea
| | - Suk-Kyun Yang
- Department of Gastroenterology, Asan Medical Center, University of Ulsan
College of Medicine, Seoul, Korea
| | - Seulgi Jung
- Department of Biochemistry and Molecular Biology, University of Ulsan College
of Medicine, Seoul, Korea
| | - Ho-Su Lee
- Department of Biochemistry and Molecular Biology, University of Ulsan College
of Medicine, Seoul, Korea
| | - Byoung Mok Kim
- Department of Biochemistry and Molecular Biology, University of Ulsan College
of Medicine, Seoul, Korea
| | - Soo Bin Lee
- Department of Biochemistry and Molecular Biology, University of Ulsan College
of Medicine, Seoul, Korea
| | - Jeonghoon Hong
- Department of Biochemistry and Molecular Biology, University of Ulsan College
of Medicine, Seoul, Korea
| | - Jiwon Baek
- Department of Biochemistry and Molecular Biology, University of Ulsan College
of Medicine, Seoul, Korea
| | - Sang Hyoung Park
- Department of Gastroenterology, Asan Medical Center, University of Ulsan
College of Medicine, Seoul, Korea
| | - Buhm Han
- Department of Convergence Medicine, University of Ulsan College of Medicine
& Asan Institute for Life Sciences, Asan Medical Center, Seoul, Korea
| | - Yi Li
- Human Genetics Group, Genome Institute of Singapore, Singapore
| | - Wenting Liu
- Human Genetics Group, Genome Institute of Singapore, Singapore
| | - Talin Haritunians
- F. Widjaja Foundation Inflammatory Bowel and Immunobiology Research
Institute; Cedars-Sinai Medical Center, Los Angeles, California, USA
| | - Kent D Taylor
- Institute for Translational Genomics and Population Sciences, Los Angeles
Biomedical Research Institute and Department of Pediatrics. Harbor-UCLA Medical Center,
Torrance, California, USA
| | - Jerome I Rotter
- Institute for Translational Genomics and Population Sciences, Los Angeles
Biomedical Research Institute and Department of Pediatrics. Harbor-UCLA Medical Center,
Torrance, California, USA
| | - So-Young Bang
- Department of Rheumatology, Hanyang University Hospital for Rheumatic
Diseases, Seoul, Korea
| | - Tae-Hwan Kim
- Department of Rheumatology, Hanyang University Hospital for Rheumatic
Diseases, Seoul, Korea
| | - Dermot P B McGovern
- F. Widjaja Foundation Inflammatory Bowel and Immunobiology Research
Institute; Cedars-Sinai Medical Center, Los Angeles, California, USA
| | - Jianjun Liu
- Human Genetics Group, Genome Institute of Singapore, Singapore
| | - Kyuyoung Song
- Department of Biochemistry and Molecular Biology, University of Ulsan College
of Medicine, Seoul, Korea,Corresponding author: Kyuyoung Song, Department of Biochemistry and
Molecular Biology, University of Ulsan College of Medicine, 88, Olympic-ro, 43-gil,
Songpa-Gu, Seoul 05505, Korea. Tel: +82-2-3010-4277; Fax: +82-2-3010-4248; E-mail:
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13
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Lee HS, Lee SB, Kim BM, Hong M, Jung S, Hong J, Baek J, Han B, Oh SH, Kim KM, Park SH, Yang SK, Ye BD, Song K. Association of CDKN2A/CDKN2B with inflammatory bowel disease in Koreans. J Gastroenterol Hepatol 2018; 33:887-893. [PMID: 29063720 DOI: 10.1111/jgh.14031] [Citation(s) in RCA: 5] [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] [Received: 09/20/2017] [Revised: 10/13/2017] [Accepted: 10/16/2017] [Indexed: 12/19/2022]
Abstract
BACKGROUND AND AIM CDKN2A/CDKN2B locus on 9p21 is reported to be associated with various diseases, including cancer and cardiovascular and inflammatory diseases. Significant downregulation of CDKN2B-AS1 in inflamed colon tissue of inflammatory bowel disease (IBD) cases was reported in Europeans. This study aimed to confirm the suggestive association of CDKN2A/CDKN2B with IBD identified in our recent genome-wide association study (GWAS). METHODS We examined the association of CDKN2A/CDKN2B locus with IBD in an additional sample of 574 IBD cases and 542 controls, totaling 4068 cases and 8074 controls. In silico study was performed at various levels for functional annotation of the causal variant. Co-localization of the GWAS association signals and the corresponding expression quantitative trait loci in IBD-related tissues was evaluated using eCAVIAR. RESULTS An expanded GWAS showed genome-wide significant association of rs3731257 at 9p21 with IBD (odds ratio = 1.17, 95% confidence interval = 1.12-1.22, Pcombined = 5.68 × 10-9 ) and Crohn's disease (odds ratio = 1.22, 95% confidence interval = 1.15-1.28, Pcombined = 8.85 × 10-9 ) in the Korean population. Co-localization study suggested that both CDKN2B-AS1 and CDKN2A might be functionally associated with the locus in the small intestine. CONCLUSIONS rs3731257 in CDKN2A/CDKN2B is an IBD-susceptible locus in Koreans, with a suggestive role for small intestine-specific gene regulation. Our findings suggested that alterations of the CDKN2A/CDKN2B locus could affect the pathophysiology of IBD.
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Affiliation(s)
- Ho-Su Lee
- Department of Biochemistry and Molecular Biology, University of Ulsan College of Medicine, Seoul, Korea
| | - Soo Bin Lee
- Department of Biochemistry and Molecular Biology, University of Ulsan College of Medicine, Seoul, Korea
| | - Byoung Mok Kim
- Department of Biochemistry and Molecular Biology, University of Ulsan College of Medicine, Seoul, Korea
| | - Myunghee Hong
- Department of Biochemistry and Molecular Biology, University of Ulsan College of Medicine, Seoul, Korea
| | - Seulgi Jung
- Department of Biochemistry and Molecular Biology, University of Ulsan College of Medicine, Seoul, Korea
| | - Jeonghoon Hong
- Department of Biochemistry and Molecular Biology, University of Ulsan College of Medicine, Seoul, Korea
| | - Jiwon Baek
- Department of Biochemistry and Molecular Biology, University of Ulsan College of Medicine, Seoul, Korea
| | - Buhm Han
- Department of Convergence Medicine, University of Ulsan College of Medicine, Asan Institute for Life Sciences, Seoul, Korea
| | - Seak Hee Oh
- Department of Pediatrics, Asan Medical Center Children's Hospital, Seoul, Korea
| | - Kyung Mo Kim
- Department of Pediatrics, Asan Medical Center Children's Hospital, Seoul, Korea
| | - Sang Hyoung Park
- Department of Gastroenterology, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea
| | - Suk-Kyun Yang
- Department of Gastroenterology, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea
| | - Byong Duk Ye
- Department of Gastroenterology, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea
| | - Kyuyoung Song
- Department of Biochemistry and Molecular Biology, University of Ulsan College of Medicine, Seoul, Korea
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K, Tielbeek AV, den Hertog HM, Gerrits DG, van den Berg-Vos RM, Karas GB, Steyerberg EW, Flach Z, Marquering HA, Sprengers ME, Jenniskens SF, Beenen LF, van den Berg R, Koudstaal PJ, van Zwam WH, Roos YB, van der Lugt A, van Oostenbrugge RJ, Wakhloo A, Moonis M, Henninger N, Goddeau R, Massari F, Minaeian A, Lozano JD, Ramzan M, Stout C, Patel A, Majoie CB, Tunguturi A, Onteddu S, Carandang R, Howk M, Ribó M, Sanjuan E, Rubiera M, Pagola J, Flores A, Muchada M, Dippel DW, Meler P, Huerga E, Gelabert S, Coscojuela P, Tomasello A, Rodriguez D, Santamarina E, Maisterra O, Boned S, Seró L, Brown MM, Rovira A, Molina CA, Millán M, Muñoz L, Pérez de la Ossa N, Gomis M, Dorado L, López-Cancio E, Palomeras E, Munuera J, Liebig T, García Bermejo P, Remollo S, Castaño C, García-Sort R, Cuadras P, Puyalto P, Hernández-Pérez M, Jiménez M, Martínez-Piñeiro A, Lucente G, Stijnen T, Dávalos A, Chamorro A, Urra X, Obach V, Cervera A, Amaro S, Llull L, Codas J, Balasa M, Navarro J, Andersson T, Ariño H, Aceituno A, Rudilosso S, Renu A, Macho JM, San Roman L, Blasco J, López A, Macías N, Cardona P, Mattle H, Quesada H, Rubio F, Cano L, Lara B, de Miquel MA, Aja L, Serena J, Cobo E, Albers GW, Lees KR, Wahlgren N, Arenillas J, Roberts R, Minhas P, Al-Ajlan F, Salluzzi M, Zimmel L, Patel S, Eesa M, Martí-Fàbregas J, Jankowitz B, van der Heijden E, Serena J, Salvat-Plana M, López-Cancio E, Bracard S, Ducrocq X, Anxionnat R, Baillot PA, Barbier C, Derelle AL, Lacour JC, Ghannouti N, Richard S, Samson Y, Sourour N, Baronnet-Chauvet F, Clarencon F, Crozier S, Deltour S, Di Maria F, Le Bouc R, Leger A, Fleitour N, Mutlu G, Rosso C, Szatmary Z, Yger M, Zavanone C, Bakchine S, Pierot L, Caucheteux N, Estrade L, Kadziolka K, Hooijenga I, Leautaud A, Renkes C, Serre I, Desal H, Guillon B, Boutoleau-Bretonniere C, Daumas-Duport B, De Gaalon S, Derkinderen P, Evain S, Puppels C, Herisson F, Laplaud DA, Lebouvier T, Lintia-Gaultier A, Pouclet-Courtemanche H, Rouaud T, Rouaud Jaffrenou V, Schunck A, Sevin-Allouet M, Toulgoat F, Pellikaan W, Wiertlewski S, Gauvrit JY, Ronziere T, Cahagne V, Ferre JC, Pinel JF, Raoult H, Mas JL, Meder JF, Al Najjar-Carpentier AA, Geerling A, Birchenall J, Bodiguel E, Calvet D, Domigo V, Godon-Hardy S, Guiraud V, Lamy C, Majhadi L, Morin L, Naggara O, Lindl-Velema A, Trystram D, Turc G, Berge J, Sibon I, Menegon P, Barreau X, Rouanet F, Debruxelles S, Kazadi A, Renou P, van Vemde G, Fleury O, Pasco-Papon A, Dubas F, Caroff J, Godard Ducceschi S, Hamon MA, Lecluse A, Marc G, Giroud M, Ricolfi F, de Ridder A, Bejot Y, Chavent A, Gentil A, Kazemi A, Osseby GV, Voguet C, Mahagne MH, Sedat J, Chau Y, Suissa L, Greebe P, Lachaud S, Houdart E, Stapf C, Buffon Porcher F, Chabriat H, Guedin P, Herve D, Jouvent E, Mawet J, Saint-Maurice JP, de Bont-Stikkelbroeck J, Schneble HM, Turjman F, Nighoghossian N, Berhoune NN, Bouhour F, Cho TH, Derex L, Felix S, Gervais-Bernard H, Gory B, de Meris J, Manera L, Mechtouff L, Ritzenthaler T, Riva R, Salaris Silvio F, Tilikete C, Blanc R, Obadia M, Bartolini MB, Gueguen A, Janssen K, Piotin M, Pistocchi S, Redjem H, Drouineau J, Neau JP, Godeneche G, Lamy M, Marsac E, Velasco S, Clavelou P, Struijk W, Chabert E, Bourgois N, Cornut-Chauvinc C, Ferrier A, Gabrillargues J, Jean B, Marques AR, Vitello N, Detante O, Barbieux M, Licher S, Boubagra K, Favre Wiki I, Garambois K, Tahon F, Ashok V, Voguet C, Coskun O, Guedin P, Rodesch G, Lapergue B, Boodt N, Bourdain F, Evrard S, Graveleau P, Decroix JP, Wang A, Sellal F, Ahle G, Carelli G, Dugay MH, Gaultier C, Ros A, Lebedinsky AP, Lita L, Musacchio RM, Renglewicz-Destuynder C, Tournade A, Vuillemet F, Montoro FM, Mounayer C, Faugeras F, Gimenez L, Venema E, Labach C, Lautrette G, Denier C, Saliou G, Chassin O, Dussaule C, Melki E, Ozanne A, Puccinelli F, Sachet M, Slokkers I, Sarov M, Bonneville JF, Moulin T, Biondi A, De Bustos Medeiros E, Vuillier F, Courtheoux P, Viader F, Apoil-Brissard M, Bataille M, Ganpat RJ, Bonnet AL, Cogez J, Kazemi A, Touze E, Leclerc X, Leys D, Aggour M, Aguettaz P, Bodenant M, Cordonnier C, Mulder M, Deplanque D, Girot M, Henon H, Kalsoum E, Lucas C, Pruvo JP, Zuniga P, Bonafé A, Arquizan C, Costalat V, Saiedie N, Machi P, Mourand I, Riquelme C, Bounolleau P, Arteaga C, Faivre A, Bintner M, Tournebize P, Charlin C, Darcel F, Heshmatollah A, Gauthier-Lasalarie P, Jeremenko M, Mouton S, Zerlauth JB, Lamy C, Hervé D, Hassan H, Gaston A, Barral FG, Garnier P, Schipperen S, Beaujeux R, Wolff V, Herbreteau D, Debiais S, Murray A, Ford G, Muir KW, White P, Brown MM, Clifton A, Vinken S, Freeman J, Ford I, Markus H, Wardlaw J, Lees KR, Molyneux A, Robinson T, Lewis S, Norrie J, Robertson F, van Boxtel T, Perry R, Dixit A, Cloud G, Clifton A, Madigan J, Roffe C, Nayak S, Lobotesis K, Smith C, Herwadkar A, Koets J, Kandasamy N, Goddard T, Bamford J, Subramanian G, Lenthall R, Littleton E, Lamin S, Storey K, Ghatala R, Banaras A, Boers M, Aeron-Thomas J, Hazel B, Maguire H, Veraque E, Harrison L, Keshvara R, Cunningham J, Santos E, Borst J, Jansen I, Kappelhof M, Lucas M, Geuskens R, Barros RS, Dobbe R, Csizmadia M, Hill MD, Goyal M, Demchuk AM, Menon BK, Eesa M, Ryckborst KJ, Wright MR, Kamal NR, Andersen L, Randhawa PA, Stewart T, Patil S, Minhas P, Almekhlafi M, Mishra S, Clement F, Sajobi T, Shuaib A, Montanera WJ, Roy D, Silver FL, Jovin TG, Frei DF, Sapkota B, Rempel JL, Thornton J, Williams D, Tampieri D, Poppe AY, Dowlatshahi D, Wong JH, Mitha AP, Subramaniam S, Hull G, Lowerison MW, Sajobi T, Salluzzi M, Wright MR, Maxwell M, Lacusta S, Drupals E, Armitage K, Barber PA, Smith EE, Morrish WF, Coutts SB, Derdeyn C, Demaerschalk B, Yavagal D, Martin R, Brant R, Yu Y, Willinsky RA, Montanera WJ, Weill A, Kenney C, Aram H, Stewart T, Stys PK, Watson TW, Klein G, Pearson D, Couillard P, Trivedi A, Singh D, Klourfeld E, Imoukhuede O, Nikneshan D, Blayney S, Reddy R, Choi P, Horton M, Musuka T, Dubuc V, Field TS, Desai J, Adatia S, Alseraya A, Nambiar V, van Dijk R, Wong JH, Mitha AP, 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Porter P, Armbruster K, Adams A, Billigan J, Oakley J, Ducruet A, Jadhav A, Giurgiutiu DV, Aghaebrahim A, Reddy V, Hammer M, Starr M, Totoraitis V, Wechsler L, Streib S, Rangaraju S, Campbell D, Rocha M, Gulati D, Silver FL, Krings T, Kalman L, Cayley A, Williams J, Stewart T, Wiegner R, Casaubon LK, Jaigobin C, del Campo JM, Elamin E, Schaafsma JD, Willinsky RA, Agid R, Farb R, ter Brugge K, Sapkoda BL, Baxter BW, Barton K, Knox A, Porter A, Sirelkhatim A, Devlin T, Dellinger C, Pitiyanuvath N, Patterson J, Nichols J, Quarfordt S, Calvert J, Hawk H, Fanale C, Frei DF, Bitner A, Novak A, Huddle D, Bellon R, Loy D, Wagner J, Chang I, Lampe E, Spencer B, Pratt R, Bartt R, Shine S, Dooley G, Nguyen T, Whaley M, McCarthy K, Teitelbaum J, Tampieri D, Poon W, Campbell N, Cortes M, Dowlatshahi D, Lum C, Shamloul R, Robert S, Stotts G, Shamy M, Steffenhagen N, Blacquiere D, Hogan M, AlHazzaa M, Basir G, Lesiuk H, Iancu D, Santos M, Choe H, Weisman DC, Jonczak K, Blue-Schaller A, Shah Q, MacKenzie L, Klein B, Kulandaivel K, Kozak O, Gzesh DJ, Harris LJ, Khoury JS, Mandzia J, Pelz D, Crann S, Fleming L, Hesser K, Beauchamp B, Amato-Marzialli B, Boulton M, Lopez- Ojeda P, Sharma M, Lownie S, Chan R, Swartz R, Howard P, Golob D, Gladstone D, Boyle K, Boulos M, Hopyan J, Yang V, Da Costa L, Holmstedt CA, Turk AS, Navarro R, Jauch E, Ozark S, Turner R, Phillips S, Shankar J, Jarrett J, Gubitz G, Maloney W, Vandorpe R, Schmidt M, Heidenreich J, Hunter G, Kelly M, Whelan R, Peeling L, Burns PA, Hunter A, Wiggam I, Kerr E, Watt M, Fulton A, Gordon P, Rennie I, Flynn P, Smyth G, O'Leary S, Gentile N, Linares G, McNelis P, Erkmen K, Katz P, Azizi A, Weaver M, Jungreis C, Faro S, Shah P, Reimer H, Kalugdan V, Saposnik G, Bharatha A, Li Y, Kostyrko P, Santos M, Marotta T, Montanera W, Sarma D, Selchen D, Spears J, Heo JH, Jeong K, Kim DJ, Kim BM, Kim YD, Song D, Lee KJ, Yoo J, Bang OY, Rho S, Lee J, Jeon P, Kim KH, Cha J, Kim SJ, Ryoo S, Lee MJ, Sohn SI, Kim CH, Ryu HG, Hong JH, Chang HW, Lee CY, Rha J, Davis SM, Donnan GA, Campbell BCV, Mitchell PJ, Churilov L, Yan B, Dowling R, Yassi N, Oxley TJ, Wu TY, Silver G, McDonald A, McCoy R, Kleinig TJ, Scroop R, Dewey HM, Simpson M, Brooks M, Coulton B, Krause M, Harrington TJ, Steinfort B, Faulder K, Priglinger M, Day S, Phan T, Chong W, Holt M, Chandra RV, Ma H, Young D, Wong K, Wijeratne T, Tu H, Mackay E, Celestino S, Bladin CF, Loh PS, Gilligan A, Ross Z, Coote S, Frost T, Parsons MW, Miteff F, Levi CR, Ang T, Spratt N, Kaauwai L, Badve M, Rice H, de Villiers L, Barber PA, McGuinness B, Hope A, Moriarty M, Bennett P, Wong A, Coulthard A, Lee A, Jannes J, Field D, Sharma G, Salinas S, Cowley E, Snow B, Kolbe J, Stark R, King J, Macdonnell R, Attia J, D'Este C, Saver JL, Goyal M, Diener HC, Levy EI, Bonafé A, Mendes Pereira V, Jahan R, Albers GW, Cognard C, Cohen DJ, Hacke W, Jansen O, Jovin TG, Mattle HP, Nogueira RG, Siddiqui AH, Yavagal DR, von Kummer R, Smith W, Turjman F, Hamilton S, Chiacchierini R, Amar A, Sanossian N, Loh Y, Devlin T, Baxter B, Hawk H, Sapkota B, Quarfordt S, Sirelkhatim A, Dellinger C, Barton K, Reddy VK, Ducruet A, Jadhav A, Horev A, Giurgiutiu DV, Totoraitis V, Hammer M, Jankowitz B, Wechsler L, Rocha M, Gulati D, Campbell D, Star M, Baxendell L, Oakley J, Siddiqui A, Hopkins LN, Snyder K, Sawyer R, Hall S, Costalat V, Riquelme C, Machi P, Omer E, Arquizan C, Mourand I, Charif M, Ayrignac X, Menjot de Champfleur N, Leboucq N, Gascou G, Moynier M, du Mesnil de Rochemont R, Singer O, Berkefeld J, Foerch C, Lorenz M, Pfeilschifer W, Hattingen E, Wagner M, You SJ, Lescher S, Braun H, Dehkharghani S, Belagaje SR, Anderson A, Lima A, Obideen M, Haussen D, Dharia R, Frankel M, Patel V, Owada K, Saad A, Amerson L, Horn C, Doppelheuer S, Schindler K, Lopes DK, Chen M, Moftakhar R, Anton C, Smreczak M, Carpenter JS, Boo S, Rai A, Roberts T, Tarabishy A, Gutmann L, Brooks C, Brick J, Domico J, Reimann G, Hinrichs K, Becker M, Heiss E, Selle C, Witteler A, Al-Boutros S, Danch MJ, Ranft A, Rohde S, Burg K, Weimar C, Zegarac V, Hartmann C, Schlamann M, Göricke S, Ringlestein A, Wanke I, Mönninghoff C, Dietzold M, Budzik R, Davis T, Eubank G, Hicks WJ, Pema P, Vora N, Mejilla J, Taylor M, Clark W, Rontal A, Fields J, Peterson B, Nesbit G, Lutsep H, Bozorgchami H, Priest R, Ologuntoye O, Barnwell S, Dogan A, Herrick K, Takahasi C, Beadell N, Brown B, Jamieson S, Hussain MS, Russman A, Hui F, Wisco D, Uchino K, Khawaja Z, Katzan I, Toth G, Cheng-Ching E, Bain M, Man S, Farrag A, George P, John S, Shankar L, Drofa A, Dahlgren R, Bauer A, Itreat A, Taqui A, Cerejo R, Richmond A, Ringleb P, Bendszus M, Möhlenbruch M, Reiff T, Amiri H, Purrucker J, Herweh C, Pham M, Menn O, Ludwig I, Acosta I, Villar C, Morgan W, Sombutmai C, Hellinger F, Allen E, Bellew M, Gandhi R, Bonwit E, Aly J, Ecker RD, Seder D, Morris J, Skaletsky M, Belden J, Baker C, Connolly LS, Papanagiotou P, Roth C, Kastrup A, Politi M, Brunner F, Alexandrou M, Merdivan H, Ramsey C, Given II C, Renfrow S, Deshmukh V, Sasadeusz K, Vincent F, Thiesing JT, Putnam J, Bhatt A, Kansara A, Caceves D, Lowenkopf T, Yanase L, Zurasky J, Dancer S, Freeman B, Scheibe-Mirek T, Robison J, Rontal A, Roll J, Clark D, Rodriguez M, Fitzsimmons BFM, Zaidat O, Lynch JR, Lazzaro M, Larson T, Padmore L, Das E, Farrow-Schmidt A, Hassan A, Tekle W, Cate C, Jansen O, Cnyrim C, Wodarg F, Wiese C, Binder A, Riedel C, Rohr A, Lang N, Laufs H, Krieter S, Remonda L, Diepers M, Añon J, Nedeltchev K, Kahles T, Biethahn S, Lindner M, Chang V, Gächter C, Esperon C, Guglielmetti M, Arenillas Lara JF, Martínez Galdámez M, Calleja Sanz AI, Cortijo Garcia E, Garcia Bermejo P, Perez S, Mulero Carrillo P, Crespo Vallejo E, Ruiz Piñero M, Lopez Mesonero L, Reyes Muñoz FJ, Brekenfeld C, Buhk JH, Krützelmann A, Thomalla G, Cheng B, Beck C, Hoppe J, Goebell E, Holst B, Grzyska U, Wortmann G, Starkman S, Duckwiler G, Jahan R, Rao N, Sheth S, Ng K, Noorian A, Szeder V, Nour M, McManus M, Huang J, Tarpley J, Tateshima S, Gonzalez N, Ali L, Liebeskind D, Hinman J, Calderon-Arnulphi M, Liang C, Guzy J, Koch S, DeSousa K, Gordon-Perue G, Haussen D, Elhammady M, Peterson E, Pandey V, Dharmadhikari S, Khandelwal P, Malik A, Pafford R, Gonzalez P, Ramdas K, Andersen G, Damgaard D, Von Weitzel-Mudersbach P, Simonsen C, Ruiz de Morales Ayudarte N, Poulsen M, Sørensen L, Karabegovich S, Hjørringgaard M, Hjort N, Harbo T, Sørensen K, Deshaies E, Padalino D, Swarnkar A, Latorre JG, Elnour E, El-Zammar Z, Villwock M, Farid H, Balgude A, Cross L, Hansen K, Holtmannspötter M, Kondziella D, Hoejgaard J, Taudorf S, Soendergaard H, Wagner A, Cronquist M, Stavngaard T, Cortsen M, Krarup LH, Hyldal T, Haring HP, Guggenberger S, Hamberger M, Trenkler J, Sonnberger M, Nussbaumer K, Dominger C, Bach E, Jagadeesan BD, Taylor R, Kim J, Shea K, Tummala R, Zacharatos H, Sandhu D, Ezzeddine M, Grande A, Hildebrandt D, Miller K, Scherber J, Hendrickson A, Jumaa M, Zaidi S, Hendrickson T, Snyder V, Killer-Oberpfalzer M, Mutzenbach J, Weymayr F, Broussalis E, Stadler K, Jedlitschka A, Malek A, Mueller-Kronast N, Beck P, Martin C, Summers D, Day J, Bettinger I, Holloway W, Olds K, Arkin S, Akhtar N, Boutwell C, Crandall S, Schwartzman M, Weinstein C, Brion B, Prothmann S, Kleine J, Kreiser K, Boeckh-Behrens T, Poppert H, Wunderlich S, Koch ML, Biberacher V, Huberle A, Gora-Stahlberg G, Knier B, Meindl T, Utpadel-Fischler D, Zech M, Kowarik M, Seifert C, Schwaiger B, Puri A, Hou S. Effect of general anaesthesia on functional outcome in patients with anterior circulation ischaemic stroke having endovascular thrombectomy versus standard care: a meta-analysis of individual patient data. Lancet Neurol 2018; 17:47-53. [DOI: 10.1016/s1474-4422(17)30407-6] [Citation(s) in RCA: 129] [Impact Index Per Article: 21.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2017] [Revised: 10/05/2017] [Accepted: 10/11/2017] [Indexed: 10/18/2022]
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Jung WS, Kim JH, Ahn SJ, Song SW, Kim BM, Seo KD, Suh SH. Prevalence of Intracranial Aneurysms in Patients with Aortic Dissection. AJNR Am J Neuroradiol 2017; 38:2089-2093. [PMID: 28882865 DOI: 10.3174/ajnr.a5359] [Citation(s) in RCA: 12] [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: 04/06/2017] [Accepted: 06/23/2017] [Indexed: 01/16/2023]
Abstract
BACKGROUND AND PURPOSE There is an uncertainty about the association between intracranial aneurysms and aortic dissection. We aimed to determine the prevalence of intracranial aneurysms in patients with aortic dissection and evaluate the independent risk factors for the presence of intracranial aneurysms in these patients. MATERIALS AND METHODS Seventy-one patients with a confirmed aortic dissection who underwent additional brain imaging were enrolled as the aortic dissection group, and 2118 healthy individuals with brain imaging, as controls. Demographic data were obtained from their medical records, including age, sex, comorbidities, and arch vessel involvement of aortic dissection. Two readers reviewed all brain images independently regarding the presence, morphology, size, and location of intracranial aneurysms. Baseline characteristics were compared between the aortic dissection group and controls by propensity score matching, and logistic regression analysis was performed for independent risk factors for the presence of intracranial aneurysms. RESULTS The prevalence of intracranial aneurysms was 12.96% in the aortic dissection group and 1.85% in controls (P = .022). The mean diameter of intracranial aneurysms was significantly larger in the aortic dissection group (5.79 ± 3.26 mm in aortic dissection versus 3.04 ± 1.57 mm in controls; P = .008), and intracranial aneurysms of >7 mm were also more common in the aortic dissection group (28.6% in aortic dissection versus 5.3% in controls, P = .003). On multivariate analysis, arch vessel involvement of aortic dissection was an independent risk factor for the presence of intracranial aneurysms (odds ratio, 6.246; 95% confidence interval, 1.472-26.50; P = .013). CONCLUSIONS Patients with aortic dissection have a high prevalence of intracranial aneurysms, and selective screening for brain vessels could be considered in these patients with arch vessel involvement. A further prospective study is needed to demonstrate a substantial prevalence of intracranial aneurysms.
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Affiliation(s)
- W S Jung
- From the Departments of Radiology (W.S.J., S.J.A., S.H.S.).,Department of Radiology (W.S.J.), Ajou University School of Medicine, Suwon, Korea
| | | | - S J Ahn
- From the Departments of Radiology (W.S.J., S.J.A., S.H.S.)
| | - S-W Song
- Cardiovascular Surgery (S.-W.S.), Gangnam Severance Hospital, Yonsei University College of Medicine, Seoul, Korea
| | - B M Kim
- Department of Radiology (B.M.K.)
| | - K-D Seo
- Department of Neurology (K.-D.S.), Wonkwang University Sanbon Hospital, Seoul, Korea
| | - S H Suh
- From the Departments of Radiology (W.S.J., S.J.A., S.H.S.) .,Severance Institute of Vascular and Metabolic Research (S.H.S.), Yonsei University College of Medicine, Seoul, Korea
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Jeon HJ, Kim BM, Kim DJ, Park KY, Kim JW, Kim DI. Combination of Multicatheter Plus Stent or Balloon for Treatment of Complex Aneurysms. AJNR Am J Neuroradiol 2015; 37:311-6. [PMID: 26381558 DOI: 10.3174/ajnr.a4526] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2015] [Accepted: 07/10/2015] [Indexed: 11/07/2022]
Abstract
BACKGROUND AND PURPOSE Coiling of complex aneurysms is still difficult even with current adjuvant techniques. This study sought to evaluate the safety and effectiveness of a combination of multicatheter plus stent or balloon for the treatment of complex aneurysms. MATERIALS AND METHODS All complex aneurysms that underwent coiling with the combination technique were identified from prospectively maintained neurointerventional data bases. "Complex aneurysm" was defined as a wide-neck aneurysm with branch incorporation into or a deep lobulation of the sac. The clinical and angiographic outcomes were retrospectively analyzed. RESULTS Sixty-two complex aneurysms (12 ruptured, 50 unruptured) in 62 patients (mean age, 57 years; male/female ratio, 12:50) were treated with a combination technique by using a multicatheter plus stent (n = 42, 3 ruptured) or balloon (n = 20, 9 ruptured). Treatment-related morbidity (grade 3 hemiparesis) occurred in 1 patient (1.6%). Except for 1 patient who had treatment-related morbidity, none of the other patients with unruptured aneurysms developed new neurologic symptoms at discharge. Nine of the 12 patients with ruptured aneurysms had good outcomes (Glasgow Outcome Score, 4 or 5) at the latest follow-up (mean, 32 months; range, 6-72 months), and 1 patient died from an initial SAH. Posttreatment control angiograms revealed complete occlusion in 27, neck remnant in 34, and incomplete occlusion in 1 aneurysm. At least 1 follow-up catheter or MR angiogram was available in 80.6% (n = 50) (mean, 21 months; range, 6-65 months). There were 4 minor and 3 major recurrences (14.0%). CONCLUSIONS In this case series, the combination technique by using multicatheter plus stent or balloon seemed safe and effective for the treatment of complex aneurysms.
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Affiliation(s)
- H J Jeon
- From the Department of Neurosurgery (H.J.J.), Hallym University College of Medicine, Kangdong Sacred Heart Hospital, Seoul, Korea
| | - B M Kim
- Departments of Radiology (B.M.K., D.J.K., J.W.K., D.I.K.) bmoon21@hanmail
| | - D J Kim
- Departments of Radiology (B.M.K., D.J.K., J.W.K., D.I.K.)
| | - K Y Park
- Neurosurgery (K.Y.P.), Severance Hospital, Yonsei University College of Medicine, Seoul, Republic of Korea
| | - J W Kim
- Departments of Radiology (B.M.K., D.J.K., J.W.K., D.I.K.)
| | - D I Kim
- Departments of Radiology (B.M.K., D.J.K., J.W.K., D.I.K.)
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Ahn SJ, Kim BM, Jung WS, Suh SH. Efficacy of skull plain films in follow-up evaluation of cerebral aneurysms treated with detachable coils: quantitative assessment of coil mass. AJNR Am J Neuroradiol 2014; 36:337-41. [PMID: 25324496 DOI: 10.3174/ajnr.a4121] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
BACKGROUND AND PURPOSE Skull plain films of coiled aneurysms have been used in a limited role, including morphologic comparison of the coil mass. We aimed to evaluate the efficacy of skull plain films in patients treated with detachable coils by using quantitative assessment. MATERIALS AND METHODS In this retrospective study, 78 pairs of the initial and follow-up skull anteroposterior and lateral images were reviewed independently by 2 neuroradiologists. The largest diameter, the perpendicular diameter, and area of the coil mass were measured separately on plain film, and quantitative changes of parameters were compared between subgroups, which were determined by consensus, depending on the need for retreatment. Subgroup analysis was also performed according to aneurysm size, packing attenuation, and ruptured status. RESULTS On skull lateral images, mean quantitative changes of the largest diameter (0.53 ± 0.43 mm versus 1.17 ± 0.91 mm, P < .01), the perpendicular diameter (0.56 ± 0.48 mm versus 1.20 ± 1.05 mm, P < .01), and the area of the coil mass (5.21 ± 7.51 mm(2) versus 10.55 ± 10.93 mm(2), P < .02) differed significantly between subgroups. Receiver operating characteristic analysis showed quantitative change of the largest diameter (>1.1 mm; sensitivity, 50.0%; specificity, 90.3%), the perpendicular diameter (>.9 mm; sensitivity, 62.5%; specificity, 85.5%), and the area (>8.5 mm(2); sensitivity, 50.0%; specificity, 83.9%) on skull lateral films to be indicative of aneurysm recurrence, and the diagnostic accuracy of these parameters increased significantly in the high-packing-attenuation group. CONCLUSIONS Quantitative measurement of the coil mass by using skull plain lateral images has the potential to predict aneurysm recurrence in follow-up evaluations of intracranial aneurysms with coiling.
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Affiliation(s)
- S J Ahn
- From the Department of Radiology (S.J.A., W.S.J., S.H.S.), Gangnam Severance Hospital
| | - B M Kim
- Department of Radiology (B.M.K.)
| | - W S Jung
- From the Department of Radiology (S.J.A., W.S.J., S.H.S.), Gangnam Severance Hospital
| | - S H Suh
- From the Department of Radiology (S.J.A., W.S.J., S.H.S.), Gangnam Severance Hospital Severance Institute of Vascular and Metabolic Research (S.H.S.), Yonsei University College of Medicine, Seoul, Korea.
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Jin S, Lee JB, Kang K, Yoo CK, Kim BM, Park HB, Lim HT, Cho IC, Maharani D, Lee JH. The Possibility of TBC1D21 as a Candidate Gene for Teat Numbers in Pigs. Asian-Australas J Anim Sci 2014; 26:1374-8. [PMID: 25049720 PMCID: PMC4093071 DOI: 10.5713/ajas.2013.13140] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/06/2013] [Revised: 06/24/2013] [Accepted: 05/29/2013] [Indexed: 12/02/2022]
Abstract
Based on a quantitative traits locus (QTL) study using a F2 intercross between Landrace and Korean native pigs, a significant QTL affecting teat numbers in SSC7 was identified. The strong positional candidate gene, TBC1D21, was selected due to its biological function for epithelial mesenchymal cell development. Sequence analysis revealed six single nucleotide polymorphisms (SNPs) in the TBC1D21 gene. Among these, two SNP markers, one silent mutation (SNP01) for g.13,050A>G and one missense mutation (SNP04) for c.829A>T (S277C), were genotyped and they showed significant associations with teat number traits (p value = 6.38E-05 for SNP01 and p value = 1.06E-07 for SNP04 with total teat numbers). Further functional validation of these SNPs could give valuable information for understanding the teat number variation in pigs.
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Affiliation(s)
- S Jin
- Department of Animal Science and Biotechnology, Chungnam National University, Deajeon 305-764, Korea
| | - J B Lee
- Department of Animal Science and Biotechnology, Chungnam National University, Deajeon 305-764, Korea
| | - K Kang
- Department of Animal Science and Biotechnology, Chungnam National University, Deajeon 305-764, Korea
| | - C K Yoo
- Department of Animal Science and Biotechnology, Chungnam National University, Deajeon 305-764, Korea
| | - B M Kim
- Department of Animal Science and Biotechnology, Chungnam National University, Deajeon 305-764, Korea
| | - H B Park
- Department of Animal Science and Biotechnology, Chungnam National University, Deajeon 305-764, Korea
| | - H T Lim
- Department of Animal Science and Biotechnology, Chungnam National University, Deajeon 305-764, Korea
| | - I C Cho
- Department of Animal Science and Biotechnology, Chungnam National University, Deajeon 305-764, Korea
| | - D Maharani
- Department of Animal Science and Biotechnology, Chungnam National University, Deajeon 305-764, Korea
| | - J H Lee
- Department of Animal Science and Biotechnology, Chungnam National University, Deajeon 305-764, Korea
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Abstract
BACKGROUND AND PURPOSE Although multiple intracranial aneurysms are frequent, determining treatment strategy and methods for them is often complicated. The aim of this study was to evaluate the safety and effectiveness of 1-stage coiling for multiple intracranial aneurysms. MATERIALS AND METHODS All patients who underwent 1-stage coiling for ≥2 aneurysms were identified from a prospectively registered neurointerventional data base during 10 years. The patient characteristics and clinical and angiographic outcomes at discharge and follow-up were retrospectively evaluated. RESULTS One hundred sixty-seven patients (male/female ratio, 30:137; mean age, 58 years) with multiple aneurysms (418 aneurysms; mean, 2.5 aneurysms/patient) underwent attempted 1-stage coiling for ≥2 aneurysms (359 aneurysms; mean, 2.1 aneurysms/patient). In 131 patients (78.4%), all detected aneurysms were treated with coiling only. Treatment-related morbidity and mortality at discharge were 1.8% and 0.6% per patient, respectively. Of the 132 patients without subarachnoid hemorrhage, 129 (97.7%) had favorable outcomes (mRS 0-2) at discharge; of the 35 patients with SAH, 27 (77.1%) had favorable outcomes at discharge. Of the 162 patients (97%) for whom clinical follow-up was available (mean, 35.8 months), 154 patients (95.1%) had favorable outcomes. Immediate posttreatment angiography showed complete occlusion in 186 (51.8%) aneurysms, neck remnants in 134 (37.3%), sac remnants in 33 (9.2%), and failure in 6 (1.7%). Of the 262 (73.9%) aneurysms that underwent follow-up imaging (mean, 24.8 months), 244 (93.1%) showed a stable or improved state, with 12 (4.6%) minor and 6 (2.3%) major recurrences. CONCLUSIONS One-stage coiling of multiple aneurysms seems to be safe and effective, with low morbidity and mortality.
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Affiliation(s)
- P Jeon
- From the Department of Radiology (P.J.), Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - B M Kim
- Department of Radiology (B.M.K., D.J.K., D.I.K.), Severance Hospital
| | - D J Kim
- Department of Radiology (B.M.K., D.J.K., D.I.K.), Severance Hospital
| | - D I Kim
- Department of Radiology (B.M.K., D.J.K., D.I.K.), Severance Hospital
| | - S H Suh
- Department of Radiology (S.H.S.), Gangnam Severance Hospital, Yonsei University College of Medicine, Seoul, Korea
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Kim BM, You MH, Chen CH, Lee S, Hong Y, Hong Y, Kimchi A, Zhou XZ, Lee TH. Death-associated protein kinase 1 has a critical role in aberrant tau protein regulation and function. Cell Death Dis 2014; 5:e1237. [PMID: 24853415 PMCID: PMC4047864 DOI: 10.1038/cddis.2014.216] [Citation(s) in RCA: 69] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2014] [Revised: 04/03/2014] [Accepted: 04/14/2014] [Indexed: 12/17/2022]
Abstract
The presence of tangles composed of phosphorylated tau is one of the neuropathological hallmarks of Alzheimer's disease (AD). Tau, a microtubule (MT)-associated protein, accumulates in AD potentially as a result of posttranslational modifications, such as hyperphosphorylation and conformational changes. However, it has not been fully understood how tau accumulation and phosphorylation are deregulated. In the present study, we identified a novel role of death-associated protein kinase 1 (DAPK1) in the regulation of the tau protein. We found that hippocampal DAPK1 expression is markedly increased in the brains of AD patients compared with age-matched normal subjects. DAPK1 overexpression increased tau protein stability and phosphorylation at multiple AD-related sites. In contrast, inhibition of DAPK1 by overexpression of a DAPK1 kinase-deficient mutant or by genetic knockout significantly decreased tau protein stability and abolished its phosphorylation in cell cultures and in mice. Mechanistically, DAPK1-enhanced tau protein stability was mediated by Ser71 phosphorylation of Pin1, a prolyl isomerase known to regulate tau protein stability, phosphorylation, and tau-related pathologies. In addition, inhibition of DAPK1 kinase activity significantly increased the assembly of MTs and accelerated nerve growth factor-mediated neurite outgrowth. Given that DAPK1 has been genetically linked to late onset AD, these results suggest that DAPK1 is a novel regulator of tau protein abundance, and that DAPK1 upregulation might contribute to tau-related pathologies in AD. Therefore, we offer that DAPK1 might be a novel therapeutic target for treating human AD and other tau-related pathologies.
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Affiliation(s)
- B M Kim
- Division of Gerontology, Department of Medicine, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA, USA
| | - M-H You
- Division of Gerontology, Department of Medicine, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA, USA
| | - C-H Chen
- Division of Hematology/Oncology, Department of Medicine, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA, USA
| | - S Lee
- 1] Department of Rehabilitation Science, Graduate School of Inje University, Gimhae, Korea [2] Cardiovascular & Metabolic Disease Center, College of Biomedical Science & Engineering, Inje University, Gimhae, Korea
| | - Y Hong
- 1] Department of Rehabilitation Science, Graduate School of Inje University, Gimhae, Korea [2] Cardiovascular & Metabolic Disease Center, College of Biomedical Science & Engineering, Inje University, Gimhae, Korea
| | - Y Hong
- 1] Division of Gerontology, Department of Medicine, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA, USA [2] Department of Rehabilitation Science, Graduate School of Inje University, Gimhae, Korea [3] Cardiovascular & Metabolic Disease Center, College of Biomedical Science & Engineering, Inje University, Gimhae, Korea
| | - A Kimchi
- Department of Molecular Genetics, Weizmann Institute of Science, Rehovot, Israel
| | - X Z Zhou
- Division of Hematology/Oncology, Department of Medicine, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA, USA
| | - T H Lee
- Division of Gerontology, Department of Medicine, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA, USA
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Jung EJ, Park HB, Lee JB, Yoo CK, Kim BM, Kim HI, Cho IC, Lim HT. Genome-wide association study identifies quantitative trait loci affecting hematological traits in an F2 intercross between Landrace and Korean native pigs. Anim Genet 2014; 45:534-41. [PMID: 24797309 DOI: 10.1111/age.12175] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/19/2014] [Indexed: 11/30/2022]
Abstract
Changes affecting the status of health and robustness can bring about physiological alterations including hematological parameters in swine. To identify quantitative trait loci (QTL) associated with eight hematological traits (one leukocyte trait, six erythrocyte traits and one platelet trait), we conducted a genome-wide association study using the PorcineSNP60K BeadChip in a resource population derived from an intercross between Landrace and Korean native pigs. A total of 36 740 SNPs from 816 F2 progeny were analyzed for each blood-related trait after filtering for quality control. Data were analyzed by the genome-wide rapid association using mixed model and regression (GRAMMAR) approach. A total of 257 significant SNPs (P < 1.36 × 10(-6) ) on SSC3, 6, 8, 13 and 17 were identified for blood-related traits in this study. Interestingly, the genomic region between 17.9 and 130 Mb on SSC8 was found to be significantly associated with red blood cell, mean corpuscular volume and mean corpuscular hemoglobin. Our results include the identification of five significant SNPs within five candidate genes (KIT, IL15, TXK, ARAP2 and ERG) for hematopoiesis. Further validation of these identified SNPs could give valuable information for understanding the variation of hematological traits in pigs.
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Affiliation(s)
- E J Jung
- Department of Animal Science, College of Agriculture and Life Sciences, Gyeongsang National University, Jinju, 660-701, Korea; Institute of Agriculture and Life Sciences, Gyeongsang National University, Jinju, 660-701, Korea
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Song D, Kim BM, Kim DJ, Kim YD, Kim J, Lee HS, Nam HS, Heo JH. Comparison of stent retriever and intra-arterial fibrinolysis in patients with acute ischaemic stroke. Eur J Neurol 2014; 21:779-84. [PMID: 24612359 DOI: 10.1111/ene.12391] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [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: 11/17/2013] [Accepted: 01/28/2014] [Indexed: 11/26/2022]
Abstract
BACKGROUND AND PURPOSE Although the stent retriever (SR) has shown a better reperfusion rate and clinical outcome than the older generation mechanical clot retrieval device, it is uncertain whether the SR is superior to intra-arterial fibrinolysis (IAF). METHODS Ischaemic stroke patients who were treated with SR or IAF as initial endovascular treatment modality for unilateral arterial occlusion in the anterior circulation were included. Successful reperfusion was defined as Thrombolysis in Cerebral Infarction grade ≥2b. A favourable clinical outcome was defined as a modified Rankin Score ≤2 at 3 months. RESULTS Between January 2009 and May 2012, 55 patients were treated with SR and 50 patients were treated with IAF. The baseline characteristics were similar between the two groups except for the occlusion site and rescue treatment. In binary logistic regression analysis adjusted for the occlusion site and rescue treatment, SR was independently associated with increased successful reperfusion [82.0% vs. 47.3%; odds ratio (OR) 5.21; 95% confidence interval (CI) 1.92-14.14) and a more favourable clinical outcome at 3 months (54.0% vs. 43.6%; OR 3.40; 95% CI 1.31-8.84). The frequency of symptomatic intracranial haemorrhage and mortality at 3 months was not different between the two groups. CONCLUSIONS Stent retriever was as safe as and more effective than IAF. Our findings suggest that SR may be considered as an initial modality rather than IAF in acute stroke patients who undergo endovascular treatment.
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Affiliation(s)
- D Song
- Department of Neurology, Yonsei University College of Medicine, Seoul, Korea
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Abstract
The INU genes of Kluyveromyces marxianus encode inulinases which are readily secreted from Saccharomyces cerevisiae into the culture medium. To evaluate the utility of the INU signal peptides for the secretion of heterologous proteins from S. cerevisiae, a variety of expression and secretion vectors were constructed with GAL10 promoter and GAL7 terminator. The coding sequence for human lipocortin-1 (LC1) was inserted in-frame with the INU signal sequences, and then the secretion efficiency and localization of LC1 were investigated in more detail and compared with those when being expressed by the vector with the MFalpha1 leader peptide. The vector systems with INU signal peptides secreted ca. 95% of the total LC1 expressed into the extracellular medium, while the MFalpha1 leader peptide-containing vector resulted in very low secretion efficiency below 10%. In addition, recombinant human interleukin-2 (IL-2) was expressed and secreted with the vector systems with INU signal peptide, and a majority fraction of the human IL-2 expressed was found to be secreted into the extracellular medium as observed in LC1 expression. (c) 1995 John Wiley & Sons, Inc.
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Affiliation(s)
- B H Chung
- Korea Research Institute of Bioscience and Biotechnology, P.O. Box 115, Yusong, Taejon 305-600, Korea
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Abstract
BACKGROUND AND PURPOSE The pathogenesis and characteristics of multiple DAVSs are not well-known. The purpose of this study was to evaluate the angiographic and clinical characteristics of patients with multiple DAVSs with an emphasis on the pathomechanism. MATERIALS AND METHODS One hundred seventy-nine patients with DAVS were reviewed. Patients with ≥ 2 fistulas at anatomically separate sites were included. Multiple DAVSs were categorized into synchronous (simultaneous multiplicity) or metachronous (temporal sequential development of multiplicity) types. The angiographic and clinical characteristics of these lesions were analyzed. RESULTS Fourteen patients were diagnosed with multiple DAVSs (7.8%; synchronous, n = 7; metachronous, n = 7). Thirteen of the 14 patients showed CVR (93%, Borden type II/III). Multiple DAVSs were frequently associated with dural sinus thrombosis (71.4%, n = 10). Synchronous DAVSs developed in association with an occluded sinus (n = 5). De novo metachronous lesions developed in association with thrombosis of a previously patent dural sinus (n = 3) or reopening of an occluded sinus (n = 2). Multiplicity was associated with aggressive initial symptoms in 64.3% (n = 9). The newly developed lesions in the metachronous types were accompanied by hemorrhage (n = 1), neurologic deficit (n = 1), worsening of the initial benign symptoms (n = 2), and incidental detection (n = 3). The mean time interval between the initial diagnosis and de novo lesion detection was 31.3 ± 29.8 months (range, 12-92 months). CONCLUSIONS Multiplicity of DAVSs is associated with poor angiographic and clinical prognosis, requiring an aggressive treatment and management strategy. Sinus thrombosis has a prominent role in the pathomechanism of DAVSs.
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Affiliation(s)
- S Y Ha
- Department of Radiology, Yonsei University College of Medicine, Seoul, Korea
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Jeon P, Kim BM, Kim DI, Park SI, Kim KH, Kim DJ, Suh SH, Huh SK, Kim YB. Reconstructive endovascular treatment of fusiform or ultrawide-neck circumferential aneurysms with multiple overlapping enterprise stents and coiling. AJNR Am J Neuroradiol 2012; 33:965-71. [PMID: 22268079 DOI: 10.3174/ajnr.a2857] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.5] [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: 11/07/2022]
Abstract
BACKGROUND AND PURPOSE Fusiform aneurysms and ultrawide-neck circumferential aneurysms are still some of the most challenging lesions. The aim of this study was to investigate the efficacy and feasibility of the use of multiple overlapping Enterprise stents with coiling for the treatment of fusiform or ultrawide-neck circumferential aneurysms. MATERIALS AND METHODS Twelve consecutive patients (9 men and 3 women; mean age, 56 years) with fusiform (n = 5) or ultrawide-neck circumferential (n = 7) aneurysms were treated with 2-3 overlapping Enterprise stents and coiling. The feasibility of this procedure and the clinical and angiographic outcomes of this technique were retrospectively evaluated. RESULTS All patients were successfully treated by using this technique without any complications. Posttreatment angiographic results revealed grade 4 occlusion of the aneurysm in 6, grade 3 in 4, and grade 2 in 2 patients. Clinical follow-up was performed in all patients (mean, 16 months; range, 5-24 months). Nine patients had an mRS score of 0. Two had an mRS score of 1, one of whom had an initial mRS score of 2 due to the mass effect of a giant aneurysm; the other had a recurrent aneurysm presenting with SAH 5 years after clipping. Angiographic follow-up was performed in 10 patients at 6-20 months posttreatment. Nine had stable or improved occlusion, while 1 had a minor recurrence. CONCLUSIONS In this small series, multiple overlapping Enterprise stents with coiling were a feasible and effective option for the treatment of fusiform and ultrawide-neck circumferential aneurysms. Further experience and follow-up are required to document the long-term efficacy of this treatment.
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Affiliation(s)
- P Jeon
- Department of Radiology, Samsung Medical Center, Sunkyunkwan University School of Medicine, Seoul, Republic of Korea
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Kim MJ, Chung J, Kim SL, Roh HG, Kwon BJ, Kim BS, Kim TH, Kim BM, Shin YS. Stenting from the vertebral artery to the posterior inferior cerebellar artery. AJNR Am J Neuroradiol 2011; 33:348-52. [PMID: 22051805 DOI: 10.3174/ajnr.a2741] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
BACKGROUND AND PURPOSE There are only a few reports on the feasibility and safety of stents used in the PICA, and clinical and angiographic follow-up results have not been fully addressed. We report our experiences of treating PICA origin or vertebral artery-PICA lesions by using self-expanding stents as adjuvant or rescue therapy with angiographic and clinical follow-up results. MATERIALS AND METHODS Six patients were treated with self-expanding stent placements from the vertebral artery to the PICA. Two patients had a vertebral artery dissecting aneurysm involving the PICA origin, 3 had vertebral artery-PICA aneurysms, and 1 had segmental stenosis of the vertebral artery harboring the origin of the PICA. The safety, feasibility, and follow-up angiographic results were retrospectively evaluated. RESULTS All procedures were successfully performed without any procedure-related complications. None of the patients showed PICA territorial infarction on DWI posttreatment. All patients were neurologically intact during the clinical follow-up of 3-24 months following the procedure. Follow-up angiography was performed at between 6 and 12 months in 5 of the 6 patients and was scheduled for the sixth patient but was not performed. The PICA showed good patency without in-stent stenosis in all 5 patients. CONCLUSIONS In patients with lesions of the PICA origin or vertebral artery-PICA lesions, vertebral artery-to-PICA stent placement may be an option for preserving PICA patency in selected cases.
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Affiliation(s)
- M J Kim
- Department of Neurosurgery, Seoul St. Mary's Hospital, Catholic University of Korea, Seoul, Republic of Korea
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Suh SH, Kim DJ, Kim DI, Kim BM, Chung TS, Hong CK, Jung JY. Management of anterior inferior cerebellar artery aneurysms: endovascular treatment and clinical outcome. AJNR Am J Neuroradiol 2010; 32:159-64. [PMID: 21051509 DOI: 10.3174/ajnr.a2360] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
BACKGROUND AND PURPOSE AICA aneurysms are rare and a challenge to treat surgically. We present our experience of the angiographic results and the clinical outcomes for 9 AICA aneurysms treated by EVT. MATERIALS AND METHODS Between 1997 and 2009, EVT was attempted for 9 AICA aneurysms. Six patients presented with SAH, and 3 aneurysms were found incidentally. The location of the aneurysms was the proximal AICA in 7 and the distal AICA in 2. Five aneurysms originated from an AICA-PICA variant. Clinical outcomes and procedural complications were evaluated, and angiography was performed 6, 12, and 24 months after embolization to confirm recanalization of the coiled aneurysm. RESULTS EVT was technically successful in 7 patients (78%). Surgical trapping was performed in 1 patient after failure of EVT, and another aneurysm occluded spontaneously, along with the parent artery during EVT. In 7 patients, the AICAs had good patency on postoperative angiography. Stent-assisted coiling was performed in 3 patients. Follow-up angiographies were performed in 7 patients and showed no evidence of recanalization or progressive occlusion with further thrombosis except in 1 patient. There was no evidence of aneurysm rupture during the follow-up period, and 8 patients were able to perform all usual activities (mRS score, 0-1). CONCLUSIONS EVT may provide a feasible and safe option as an alternative, though a microsurgical option is initially considered for the management of AICA aneurysms. Further follow-up and more experience are also necessary.
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Affiliation(s)
- S H Suh
- Department of Radiology, Gangnam Severance Hospital, Yonsei University, Seoul, Republic of Korea
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Jeon P, Kim BM, Kim DI, Shin YS, Kim KH, Park SI, Kim DJ, Suh SH. Emergent self-expanding stent placement for acute intracranial or extracranial internal carotid artery dissection with significant hemodynamic insufficiency. AJNR Am J Neuroradiol 2010; 31:1529-32. [PMID: 20430849 DOI: 10.3174/ajnr.a2115] [Citation(s) in RCA: 34] [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] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
BACKGROUND AND PURPOSE ICAD with hemodynamic insufficiency may present with either fulminant infarct or with progressive neurologic deterioration. The purpose of this study was to evaluate the safety and efficacy of emergent self-expanding stent placement for acute intracranial or extracranial ICAD with significant hemodynamic insufficiency. MATERIALS AND METHODS Eight patients (7 men and 1 woman; age range, 20-55 years; NIHSS score, 5-21) underwent emergent self-expanding stent placement for treatment of significant hemodynamic insufficiency due to acute ICAD. The safety and efficacy of emergent self-expanding stent placement were retrospectively evaluated. RESULTS All patients presented with progressive (n = 6) or fluctuating (n = 2) neurologic deficits and revealed markedly decreased perfusion on CT or MR perfusion studies. Conventional angiography revealed acute occlusion (n = 2) or critical stenosis (n = 6) in intracranial (n = 3) or extracranial (n = 5) carotid arteries with a lack of sufficient collaterals. Stent placement was successful in all patients without any procedure-related complications. In all patients, hemodynamic insufficiency was corrected immediately after stent placement, and neurologic symptoms were completely resolved during several days. Mean improvement of the NIHSS score between baseline and discharge was 11.6 (range, 5-21). All patients remained neurologically intact (mRS, 0) during clinical follow-up for a mean of 21 months (range, 8-50 months). Angiographic follow-up was available for 6 patients at 3-12 months. None of the 6 patients revealed residual or in-stent restenosis. CONCLUSIONS Self-expanding stent placement is a safe and effective option for selected patients with significant hemodynamic insufficiency due to acute intracranial or extracranial ICAD.
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Affiliation(s)
- P Jeon
- Department of Radiology, Sungkyunkwan University School of Medicine, Seoul, Korea
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Suh SH, Kim BM, Roh HG, Lee KY, Park SI, Kim DI, Kim DJ, Nam HS, Choi HS. Self-expanding stent for recanalization of acute embolic or dissecting intracranial artery occlusion. AJNR Am J Neuroradiol 2009; 31:459-63. [PMID: 19892814 DOI: 10.3174/ajnr.a1865] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
BACKGROUND AND PURPOSE Stent placement may be an effective and last resort method for recanalization of recalcitrant intracranial artery occlusion. The purpose of this study was to evaluate the safety and efficacy of a self-expanding stent for the recanalization of acute embolic or dissecting intracranial artery occlusion. MATERIALS AND METHODS Nine patients (mean age, 66 years; NIHSS score, 10-23) with acute embolic (n = 8) or dissecting occlusion (n = 1) of the intracranial arteries (ICA terminus in 5, MCA in 3, and BA in 1) were treated with a recapturable self-expanding stent. The safety and efficacy of the stent for recanalization were evaluated retrospectively. RESULTS The emboli were entrapped against the vessel wall by the stent, resulting in immediate recanalization (TIMI 2) in all embolic occlusions. The dissecting occlusion was recanalized completely (TIMI 3). Adjunctive thrombolytics (n = 8, urokinase, 100,000-300,000 U) and/or GP IIb/IIIa antagonist (n = 7, tirofiban, 0.5-1 mg) were administered intra-arterially, and the degree of recanalization further improved in 4 embolic occlusions (TIMI 3). Acute in-stent thrombosis occurred in 2 patients, who received only urokinase without GP IIb/IIIa antagonist. Both of the reoccluded arteries were reopened, by stent recapture in 1 and by intra-arterial administration of GP IIb/IIIa antagonist in the other. Recapture was attempted in 7 cases, of which there were 3 successful outcomes. There was 1 asymptomatic hemorrhagic conversion at the infarction site. The mean improvement of the NIHSS score between baseline and discharge was 12.3 (range, 3-22). CONCLUSIONS Preliminary results of this study suggest that a self-expanding stent may be safe and efficient for recanalization of acute embolic or dissecting intracranial artery occlusion.
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Affiliation(s)
- S H Suh
- Department of Radiology, Gangnam Severance Hospital, Yonsei University College of Medicine, Seoul, Korea
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Kim BM, Park SI, Kim DJ, Kim DI, Suh SH, Kwon TH, Choi HS, Won YS. Endovascular coil embolization of aneurysms with a branch incorporated into the sac. AJNR Am J Neuroradiol 2009; 31:145-51. [PMID: 19749218 DOI: 10.3174/ajnr.a1785] [Citation(s) in RCA: 50] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
BACKGROUND AND PURPOSE Because of the concern for occlusion of the incorporated branch artery, an aneurysm with a branch incorporated into the sac has been regarded as a contraindication for coiling. The aim of this study is to evaluate the feasibility, techniques, and clinical and angiographic outcomes of coiling for aneurysms with a branch incorporated into the sac. MATERIALS AND METHODS The medical records and radiologic studies of 69 patients with 79 aneurysms having a branch incorporated into the sac (26 ruptured, 53 unruptured) were retrospectively reviewed and evaluated. RESULTS Coiling was accomplished in 78 aneurysms in 68 patients but was suspended in 1 due to incorporated branch occlusion. The aneurysms were treated by using the following techniques: single-catheter (n = 37), multicatheter (n = 22), balloon-remodeling (n = 7), stent-assisted coiling (n = 6), and combined (n = 7). Postembolization angiography revealed the following: near-complete occlusion in 71 (89.8%), remnant neck in 4 (5.1%), and incomplete occlusion in 4 (5.1%) aneurysms. Procedure-related permanent morbidity and mortality rates were 5.8% (4/69) and 0%, respectively. All patients with unruptured aneurysms had a modified Rankin Scale (mRS) score of 0, except for 1 patient who had an mRS score of 3. Of the 26 patients with ruptured aneurysms, 18 had favorable outcome (mRS 0-2) but 8 had poor outcome (mRS 3-6). Follow-up angiography was available at least once at 6-50 months (mean, 15 months) in 55 aneurysms (69.6%), of which 45 showed stable or improved occlusion; 4, minor recurrences; and 6, major recurrences. All 6 major recurrent aneurysms were retreated without complication by using a single-catheter (n = 1), multicatheter (n = 2), or balloon-assisted technique (n = 3). CONCLUSIONS With appropriate techniques, most aneurysms with a branch incorporated into the sac could be safely treated by coiling, with acceptable outcomes.
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Affiliation(s)
- B M Kim
- Department of Radiology, Yonsei University College of Medicine, Severance Hospital, Seoul, Korea.
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Suh SH, Kim BM, Chung TS, Kim DI, Kim DJ, Hong CK, Kim CH, Ahn JY, Kim SS. Reconstructive endovascular treatment of intracranial fusiform aneurysms: a 1-stage procedure with stent and balloon. AJNR Am J Neuroradiol 2009; 31:155-60. [PMID: 19749226 DOI: 10.3174/ajnr.a1784] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
BACKGROUND AND PURPOSE Intracranial fusiform aneurysms, which incorporate the branch vessel and require salvaging of the parent vessel, are difficult to manage. The goal of this study was to evaluate the efficacy of reconstructive endovascular treatment of intracranial fusiform aneurysms by using a 1-stage procedure with a stent and balloon. MATERIALS AND METHODS During a 3-year period, 20 patients with 20 intracranial fusiform aneurysms were treated by using a 1-stage procedure involving a balloon and stent. Subarachnoid hemorrhage was present in 15 patients. Five aneurysms were located in the anterior circulation and 15, in the posterior circulation. Clinical outcomes and periprocedural complications were evaluated in all patients. The extent of coil packing was evaluated by control angiography after embolization and classified as either complete occlusion or partial occlusion. Angiography was performed 6, 12, and 24 months after embolization to evaluate stent patency and coil packing. RESULTS The 1-stage procedure by using a combination of balloon and stent was technically successful in all patients. There were no complications related to the procedure, complete occlusion was obtained in 16 patients, and partial occlusion, in 4 patients. All patients recovered well except for 2 who died due to causes unrelated to the procedure. Clinical follow-up was performed in all surviving patients at a mean of 12.3 months (range, 7-24 months), and angiography showed that the patent parent arteries were free of aneurysm recanalization or in-stent stenosis. CONCLUSIONS This 1-stage procedure may provide a feasible and safe treatment strategy for the management of intracranial fusiform aneurysms that are not amenable to deconstructive embolization.
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Affiliation(s)
- S H Suh
- Department of Radiology, Gangnam Severance Hospital, Yonsei University, Seoul, Republic of Korea
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Park SI, Kim BM, Kim DI, Shin YS, Suh SH, Chung EC, Kim SY, Kim SH, Won YS. Clinical and angiographic follow-up of stent-only therapy for acute intracranial vertebrobasilar dissecting aneurysms. AJNR Am J Neuroradiol 2009; 30:1351-6. [PMID: 19342544 DOI: 10.3174/ajnr.a1561] [Citation(s) in RCA: 102] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
BACKGROUND AND PURPOSE Little has been known about the clinical and angiographic follow-up results of stent-only therapy for intracranial vertebrobasilar dissecting aneurysms (VBDA). The purpose of this study was to evaluate the feasibility, safety, clinical, and angiographic follow-up of stent-only therapy for VBDA. MATERIALS AND METHODS Twenty-seven patients with 29 VBDAs (11 ruptured, 18 unruptured), not suitable for deconstructive treatment, underwent stent-only therapy. Feasibility, safety, clinical, and angiographic follow-up were retrospectively evaluated. Angiographic outcomes were compared between single-stent and multiple-stent groups. RESULTS All attempted stent placements were successfully accomplished without any treatment-related complication. Of the 11 ruptured VBDAs, 4 were treated by single stents, 6 by double overlapping stents, and 1 by triple overlapping stents. Of the 18 unruptured VBDAs, 6 were treated by stents, and 12 by double overlapping stents. One patient with a ruptured VBDA, treated by single stent, had rebleeding and died. None of the remaining patients had posttreatment bleeding during follow-up (mean, 28 months; range, 7-50 months). Eight patients with ruptured VBDA and all patients with unruptured VBDA had excellent outcomes (modified Rankin Scale, 0-1). The remaining 2 patients with ruptured VBDA were moderately disabled because of the initial damage. Angiographic follow-up was available in 27 VBDAs, 4 to 42 months (mean, 12 months) after treatment. Follow-up angiograms revealed complete obliteration of the dissecting aneurysm in 12, partial obliteration in 12, stable in 1, enlargement in 1, and in-stent occlusion in 1. Angiographic improvement (complete or partial obliteration) was more frequent in the multiple-stent group (17/17) than in the single-stent group (7/9; P < .05). CONCLUSIONS In this small series, stent-only therapy was safe and effective in the treatment of VBDAs that were not deemed suitable for treatment with parent-artery occlusion.
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Affiliation(s)
- S I Park
- Department of Radiology, Soonchunhyang University College of Medicine, Bucheon Hospital, Bucheon, Korea
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Kwak HH, Shim WS, Choi MK, Son MK, Kim YJ, Yang HC, Kim TH, Lee GI, Kim BM, Kang SH, Shim CK. Development of a sustained-release recombinant human growth hormone formulation. J Control Release 2009; 137:160-5. [PMID: 19332090 DOI: 10.1016/j.jconrel.2009.03.014] [Citation(s) in RCA: 48] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2008] [Revised: 03/11/2009] [Accepted: 03/21/2009] [Indexed: 11/25/2022]
Abstract
Recombinant human growth hormone (rhGH) therapy for short stature must be administered as a daily injection because of its poor bioavailability and short half-life. In the present study, a sustained-release formulation of rhGH (SR-rhGH), DA-3003, was prepared using double emulsion solvent evaporation with poly(D,L-lactide-co-glycolide) (PLGA), zinc oxide and hydroxypropyl-beta-cyclodextrin (HPCD) as the release modulator, stabilizer, and aggregation-prevention agent, respectively. After a single administration of DA-3003, the elevated concentration of rhGH in plasma was sustained for 14 days in rats and 28 days in monkeys. The plasma concentration of insulin-like growth factor-1 (IGF-I) and insulin-like growth factor binding protein-3 (IGFBP-3), which are pharmacodynamic markers of rhGH administration, increased and remained elevated for approximately 28 days in monkeys. Monkeys administered DA-3003 did not develop antibodies to hGH, indicating safety of the SR-rhGH formulation comparable to that observed with daily rhGH injections (Growtropin II). There were no significant differences in efficacy between Growtropin II (daily dose of 5 microg/animal for 14 days) and DA-3003 (weekly dose of 35 microg/animal for 14 days with a dosing interval of a week) in hypophysectomized rats, as assessed by changes in body weight and the width of the tibial growth plate. These results show that a sustained-release rhGH formulation, DA-3003, has the potential to be used safely and efficaciously in a weekly dosing regimen.
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Affiliation(s)
- H H Kwak
- Biopharmaceutical Research Laboratory, Dong-A Pharm. Co. Ltd., Gyeonggi, 446-905, Republic of Korea
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Kim BM, Suh SH, Park SI, Shin YS, Chung EC, Lee MH, Kim EJ, Koh JS, Kang HS, Roh HG, Won YS, Chung PW, Kim YB, Suh BC. Management and clinical outcome of acute basilar artery dissection. AJNR Am J Neuroradiol 2008; 29:1937-41. [PMID: 18687744 DOI: 10.3174/ajnr.a1243] [Citation(s) in RCA: 62] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
BACKGROUND AND PURPOSE There have been inconsistencies on the prognosis and controversies as to the proper management of acute basilar artery dissection. The aim of this study was to evaluate acute basilar artery dissection and its outcome after management. MATERIALS AND METHODS A total of 21 patients (mean age, 53 years; range, 24-78 years) with acute basilar artery dissection were identified between January 2001 and October 2007. Clinical presentation, management, and outcomes were retrospectively evaluated. RESULTS The patients presented with subarachnoid hemorrhage (n = 10), brain stem ischemia (n = 10), or stem compression sign (n = 1). Ruptured basilar artery dissections were treated by stent placement with coiling (n = 4), single stent placement (n = 3), or conservatively (n = 3). Of the patients treated with endovascular technique, 6 had favorable outcome (modified Rankin scale [mRS], 0-2) and the remaining patient, who was treated by single stent placement, died from rebleeding. All 3 conservatively managed patients experienced rebleeding, of whom 2 died and the other was moderately disabled. Unruptured basilar artery dissections were treated conservatively (n = 7) or by stent placement (n = 4). Of the patients with unruptured basilar artery dissection, 9 had favorable outcome and the remaining 2 patients, both of whom were conservatively managed, had poor outcome because of infarct progression. The group with the ruptured basilar artery dissection revealed a higher mortality rate than the group with the unruptured dissection (30% vs 0%). The group treated with endovascular means revealed more favorable outcome than the group that was treated with conservative measures (90.9% vs 50%). CONCLUSION The ruptured basilar artery dissections were at high risk for rebleeding, resulting in a grave outcome. Stent placement with or without coiling may be considered to prevent rebleeding in ruptured basilar dissections and judiciously considered in unruptured dissections with signs of progressive brain stem ischemia.
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Affiliation(s)
- B M Kim
- Department of Radiology, Sungkyunkwan University School of Medicine, Kangbuk Samsung Hospital, Seoul, Korea
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Chae HD, Kim BM, Yun UJ, Shin DY. Deregulation of Cdk2 causes Bim-mediated apoptosis in p53-deficient tumors following actin damage. Oncogene 2008; 27:4115-21. [DOI: 10.1038/onc.2008.46] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
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Kim BM, Kim DI, Shin YS, Chung EC, Kim DJ, Suh SH, Kim SY, Park SI, Choi CS, Won YS. Clinical outcome and ischemic complication after treatment of anterior choroidal artery aneurysm: comparison between surgical clipping and endovascular coiling. AJNR Am J Neuroradiol 2007; 29:286-90. [PMID: 18024579 DOI: 10.3174/ajnr.a0806] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
BACKGROUND AND PURPOSE Although coiling has been favorably comparable with clipping for treatment of most intracranial aneurysms, there is a controversy on which modality is safer for anterior choroidal artery (AchoA) aneurysm. We retrospectively evaluated the clinical outcomes and treatment-related complications after surgical clipping and endovascular coiling of AchoA aneurysms. MATERIALS AND METHODS Seventy-three AchoA aneurysms were recruited from 1895 intracranial aneurysms, which were treated either by surgical clipping or by endovascular coiling in 4 institutions between May 1999 and December 2006. The AchoA aneurysms were dichotomized according to the modality of treatment, the coil group (37 patients; 38 aneurysms) and the clip group (35 patients; 35 aneurysms). Clinical outcomes and incidence of treatment-related complications between 2 groups and the factors influencing the clinical outcomes were evaluated. RESULTS There was no rebleeding in both groups during follow-up, for 4-72 months (mean, 27 months) in the coil group and for 3-84 months (mean, 34 months) in the clip group. In the coil group, 31 patients (83.8%) had favorable outcome (modified Rankin Scale score [mRS], 0-3). In the clip group, 31 patients (88.6%) had favorable outcome. The complication of coiling was transient contralateral hemiparesis in 2 patients, who recovered completely. The complications of clipping were permanent contralateral hemiparesis due to AchoA infarction in 4 patients and third-nerve palsy in 1 patient. Hunt and Hess grade 4 or 5 and AchoA infarction were significantly correlated with poor outcome (mRS, < or =4). Clipping had significantly higher incidence of AchoA infarction than coiling (P < .05). CONCLUSION Coiling of AchoA aneurysms appears comparable with clipping in clinical outcome and prevention of rebleeding, with significantly lower incidence of AchoA infarction than clipping.
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Affiliation(s)
- B M Kim
- Department of Radiology, Sungkyunkwan University School of Medicine, Kangbuk Samsung Hospital, Seoul, South Korea
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Mattia D, Rossi MP, Kim BM, Korneva G, Bau HH, Gogotsi Y. Effect of Graphitization on the Wettability and Electrical Conductivity of CVD-Carbon Nanotubes and Films. J Phys Chem B 2006; 110:9850-5. [PMID: 16706438 DOI: 10.1021/jp061138s] [Citation(s) in RCA: 174] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The use of carbon nanomaterials in various applications requires precise control of their surface and bulk properties. In this paper, we present a strategy for modifying the surface chemistry, wettability, and electrical conductivity of carbon tubes and films through annealing in a vacuum. Experiments were conducted with 60-300 nm nanotubes (nanopipes), produced by noncatalytic chemical vapor deposition (CVD) in a porous alumina template, and with thin films deposited by the same technique on a glassy carbon substrate having the same structure and chemistry of the CNTs. The surface of the as-produced CVD-carbon, treated with sodium hydroxide to remove the alumina template, is hydrophilic, and the bulk electrical conductivity is lower by a factor of 20 than that of fully graphitic multiwalled nanotubes (MWNT) or bulk graphite. The bulk electrical conductivity increases to the conductivity of graphite after annealing at 2000 degrees C in a high vacuum. The analysis of CNTs by transmission electron microscopy (TEM) and Raman spectroscopy shows the ordering of carbon accompanied by an exponential increase of the in-plane crystallite size, L(a), with increasing annealing temperature. Environmental scanning electron microscopy (ESEM) was used to study the interaction of CNT with water, and contact angle measurements performed using the sessile drop method on CVD-carbon films demonstrate that the contact angle increases nearly linearly with increasing annealing temperature.
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Affiliation(s)
- D Mattia
- Materials Science and Engineering Department and AJ Drexel Nanotechnology Institute, Drexel University, Philadelphia, Pennsylvania 19104, USA
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Kim BM, Kim SY, Lee S, Shin YJ, Min BH, Bendayan M, Park IS. Clusterin induces differentiation of pancreatic duct cells into insulin-secreting cells. Diabetologia 2006; 49:311-20. [PMID: 16411126 DOI: 10.1007/s00125-005-0106-2] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.8] [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] [Received: 06/30/2005] [Accepted: 10/20/2005] [Indexed: 11/27/2022]
Abstract
AIMS/HYPOTHESIS We recently reported that expression of the gene encoding clusterin (Clu) is upregulated in the regenerating pancreas, particularly in tissues undergoing differentiation. This led us to propose that clusterin participates in the cytodifferentiation of pancreatic tissue, particularly the endocrine islet cells. The aim of this study was to investigate whether clusterin induces the differentiation of duct-lining cells into insulin-secreting cells. METHODS We isolated ductal tissue from rat pancreas and cultured it to develop epithelial cell explants for transfection of the Clu cDNA as well as for treatment of clusterin protein. RESULTS The number of newly differentiated insulin cells increased 6.9-fold upon Clu overexpression compared with controls. Ins1 mRNA and peptide levels were also increased. Furthermore, glucose-stimulated insulin secretion was observed in the differentiated insulin cells. These cells were immunoreactive for insulin and C-peptide, but negative for other islet hormones and for cytokeratin-20, which indicates a fully differentiated state. Insulin cell differentiation was also increased in a dose-dependent manner by treating duct cells in culture with clusterin, indicating a growth-factor-like action of clusterin in insulin cell differentiation. CONCLUSIONS/INTERPRETATION These results suggest that clusterin can be considered as a potential morphogenic factor that promotes differentiation of pancreatic beta cells.
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Affiliation(s)
- B M Kim
- Department of Anatomy, College of Medicine, Inha University Incheon, Choong-Gu, Shinheung-Dong, Incheon 400-103, Korea
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Abstract
Parkinsonism associated with dural arteriovenous fistula (DAVF) has been described rarely; however, isolated parkinsonism as the presenting symptom of DAVF has not been reported. Here, we describe a patient with DAVF showing reversible isolated parkinsonism after embolization, which was well correlated with perfusion status of basal ganglia, suggesting that a perfusion defect was responsible for the pathogenesis of the parkinsonism in our DAVF patient.
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Affiliation(s)
- P H Lee
- Department of Neurology, College of Medicine, Ajou University, Wonchon-dong, Suwon, South Korea.
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40
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Eichler J, Kim BM. [Introduction to tissue optics and optical dosimetry]. Z Med Phys 2002; 11:195-200. [PMID: 11668817 DOI: 10.1016/s0939-3889(15)70513-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
The spatial distribution of radiation during medical laser application is determined by the characteristics of the beam (power, time, beam geometry) and the optical properties of the tissue. The irradiance E (in W/m2) describes the primary laser beam. Scattered radiation, in turn, is taken into account by the fluence rate phi (also in W/m2). The basic parameters of tissue optics are the absorption coefficient mu a, the scattering coefficient mu s and the anisotropy factor g. In addition, derived parameters are also used, i.e., total attenuation coefficient mu t, reduced scattering coefficient mu s', effective attenuation coefficient mu eff, mean free path of a photon d and penetration depth delta. Further tissue properties are the diffuse reflectance Rd and the back-scattering factor k. In an one-dimensional model the fluence rate phi in tissue is a nearly exponential function characterized by the penetration depth delta. At the tissue surface, the relationship exists phi = kE. This model is compared with the results of a computer program based on the finite element method.
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Affiliation(s)
- J Eichler
- Labor für Laseranwendungen, Technische Fachhochschule Berlin
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Abstract
AIMS/HYPOTHESIS Beta-cell regeneration has been reported after islet injury in an animal model for diabetes. Recently, we showed up-regulation of clusterin after islet injury and suggested that clusterin might be involved in cytoprotection and in the regeneration of islet cells. The aim of this study was to investigate the correlation of clusterin expression with islet regeneration and its effect on islet cell replication. METHODS Streptozotocin was administrated to rats to induce various types of diabetes. Islet regeneration and clusterin expression were examined after islet injuries. Clusterin cDNA was transfected to MIN6 cells and their proliferation activity was measured by a [3H]thymidine-incorporation assay. RESULTS A diabetogenic dose of streptozotocin injected in rats provoked an immediate degeneration of beta cells. In this model, islets showed increased clusterin expression with extensive proliferation of alpha cells but showed poor beta-cell replication. A subdiabetogenic dose of streptozotocin, however, led to the proliferation of beta cells with clusterin up-regulation. In streptozotocin-treated neonatal rats, up-regulation of clusterin was noted during beta-cell proliferation. In all experimental models, clusterin was expressed in alpha cells in close correlation with islet cell proliferation, higher transcription of insulin mRNA and MAPKs activation. Cell replication was increased by 31 % in the MIN6 cells transfected by the clusterin cDNA. CONCLUSION/INTERPRETATION Up-regulation of clusterin in alpha cells might induce beta-cell proliferation and thus restore their population after islet injury. We suggest that clusterin could be considered as a growth factor-like molecule stimulating islet-cell proliferation by paracrine action.
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Affiliation(s)
- B M Kim
- Department of Anatomy, College of Medicine, Inha University, Choong-Gu, Shinheung-Dong, Inchon, Korea
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42
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Abstract
Onconase is an amphibian protein that is now in Phase III clinical trials as a cancer chemotherapeutic. Human pancreatic ribonuclease (RNase 1) is homologous to Onconase but is not cytotoxic. Here, ERDD RNase 1, which is the L86E/N88R/G89D/R91D variant of RNase 1, is shown to have conformational stability and ribonucleolytic activity similar to that of the wild-type enzyme but > 10(3)-fold less affinity for the endogenous cytosolic ribonuclease inhibitor protein. Most significantly, ERDD RNase 1 is toxic to human leukemia cells. The addition of a non-native disulfide bond to ERDD RNase 1 not only increases the conformational stability of the enzyme but also increases its cytotoxicity such that its IC(50) value is only 8-fold greater than that of Onconase. Thus, only a few amino acid substitutions are necessary to make a human protein toxic to human cancer cells. This finding has significant implications for human cancer chemotherapy.
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MESH Headings
- Amino Acid Sequence
- Amino Acids/chemistry
- Antineoplastic Agents/pharmacology
- Cell Division
- Cysteine/chemistry
- DNA, Complementary/metabolism
- Disulfides
- Dose-Response Relationship, Drug
- Electrophoresis, Agar Gel
- Humans
- Inhibitory Concentration 50
- K562 Cells
- Kinetics
- Leukemia/drug therapy
- Models, Biological
- Molecular Sequence Data
- Mutagenesis, Site-Directed
- Protein Conformation
- Ribonuclease, Pancreatic/chemistry
- Ribonuclease, Pancreatic/metabolism
- Ribonuclease, Pancreatic/pharmacology
- Ribonuclease, Pancreatic/toxicity
- Ribonucleases/pharmacology
- Spectrometry, Fluorescence
- Temperature
- Tumor Cells, Cultured
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Affiliation(s)
- P A Leland
- Department of Biochemistry, University of Wisconsin-Madison, Madison, Wisconsin 53706, USA
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Kim BM, Bae SJ, So SM, Yoo HT, Chang SK, Lee JH, Kang J. Synthesis of a chiral aziridine derivative as a versatile intermediate for HIV protease inhibitors. Org Lett 2001; 3:2349-51. [PMID: 11463313 DOI: 10.1021/ol016147s] [Citation(s) in RCA: 44] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
[reaction: see text] Chiral aziridine derivative 1 was prepared from D-tartaric acid. This compound could be utilized as a common intermediate for the synthesis of hydroxyethylamine class HIV protease inhibitors such as saquinavir, amprenavir, or nelfinavir.
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Affiliation(s)
- B M Kim
- Center for Molecular Catalysis, School of Chemistry & Molecular Engineering, Seoul National University, Seoul, 151-747, Korea.
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44
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Morimoto N, Suzuki S, Kim BM, Morota K, Takahashi Y, Nishimura Y. In vivo cultured skin composed of two-layer collagen sponges with preconfluent cells. Ann Plast Surg 2001; 47:74-81; discussion 81-2. [PMID: 11756808 DOI: 10.1097/00000637-200107000-00014] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.6] [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: 11/27/2022]
Abstract
Although various kinds of cultured skin substitutes have been developed, it takes several weeks to produce them before grafting. In their previous study, the authors succeeded in producing cultured skin easily in a short period of time by layering two collagen sponges. In the current study, to shorten this period even further, they grafted the cell-preconfluent artificial skin immediately after seeding the cells. They used two collagen sponges with different pore sizes and crosslink densities. They seeded 1,000,000 cells per square centimeter of fibroblasts and 1,000,000 cells per square centimeter of keratinocytes on the respective collagen sponges and grafted them on a full-thickness, excised wound on the back of severe combined immunodeficient mice. Two weeks after grafting, epithelium and dermislike tissue were formed. They then decreased the number of keratinocytes and grafted them. Four weeks after grafting, at seeding densities of 50,000 to 1,000,000 cells per square centimeter of keratinocytes, the preconfluent artificial skin took histologically, and human type IV and type VII collagen were stained immunohistochemically. This cell-preconfluent artificial skin composed of two-layer collagen sponges seems promising for widespread clinical use.
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Affiliation(s)
- N Morimoto
- Department of Plastic and Reconstructive Surgery, Graduate School of Medicine, Kyoto University, Japan
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45
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Kim BM, Feit MD, Rubenchik AM, Joslin EJ, Celliers PM, Eichler J, Da Silva LB. Influence of pulse duration on ultrashort laser pulse ablation of biological tissues. J Biomed Opt 2001; 6:332-338. [PMID: 11516324 DOI: 10.1117/1.1381561] [Citation(s) in RCA: 16] [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] [Subscribe] [Scholar Register] [Received: 12/07/1999] [Revised: 12/29/2000] [Accepted: 01/03/2001] [Indexed: 05/23/2023]
Abstract
Ablation characteristics of ultrashort laser pulses were investigated for pulse durations in the range of 130 fs-10 ps. Tissue samples used in the study were dental hard tissue (dentin) and water. We observed differences in ablation crater morphology for craters generated with pulse durations in the 130 fs-1 ps and the 5 ps-10 ps range. For the water experiment, the surface ablation and subsequent propagation of stress waves were monitored using Mach-Zehnder interferometry. For 130 fs-1 ps, energy is deposited on the surface while for longer pulses the beam penetrates into the sample. Both studies indicate that a transition occurs between 1 and 5 ps.
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Affiliation(s)
- B M Kim
- Yonsei University, Department of Biomedical Engineering, 234 Maeji, Heungup, Wonjoo, Kangwon-Do, 220-710 Korea.
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Son SU, Yoon YA, Choi DS, Park JK, Kim BM, Chung YK. Dicobalt octacarbonyl catalyzed carbonylated cycloaddition of triynes to functionalized tetracycles. Org Lett 2001; 3:1065-7. [PMID: 11277796 DOI: 10.1021/ol015635x] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
[reaction: see text]. We have demonstrated that a dicobalt octacarbonyl catalyzed double [2 + 2 + 1] carbonylative cycloaddition reaction of triyne can be carried out to yield a novel 5.5.5.6 tetracyclic di-enone system.
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Affiliation(s)
- S U Son
- School of Chemistry and Center for Molecular Catalysis, Seoul National University, Seoul 151-747, Korea
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47
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Kim BM, Eichler J, Reiser KM, Rubenchik AM, Da Silva LB. Collagen structure and nonlinear susceptibility: effects of heat, glycation, and enzymatic cleavage on second harmonic signal intensity. Lasers Surg Med 2001; 27:329-35. [PMID: 11074509 DOI: 10.1002/1096-9101(2000)27:4<329::aid-lsm5>3.0.co;2-c] [Citation(s) in RCA: 113] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
BACKGROUND AND OBJECTIVE Helical macromolecules such as collagen and DNA are characterized by nonlinear optical properties, including nonlinear susceptibility. Because collagen is the predominant component of most biological tissues, as well as the major source of second harmonic generation (SHG), it is reasonable to assume that changes in harmonic signal can be attributed to structural changes in collagen. The purpose of this study is to determine whether various modifications of collagen structure affect second harmonic intensity. STUDY DESIGN/MATERIALS AND METHODS SHG was measured in tissues from cows, humans, and chickens. The effects of beam polarization, thermal denaturation, glyco-oxidative damage, and enzymatic cleavage of tissues on second harmonic intensity was studied. RESULTS The second harmonic intensity differed considerably among different tissues, as did the effect of the incident beam polarization. In structurally modified collagen, SHG was significantly degraded from SHG in intact collagen. CONCLUSION These structural modifications are representative of changes that occur in pathophysiologic conditions such as thermal injury, diabetes, tumor invasion, and abnormal wound healing. The ability to assess these changes rapidly and noninvasively has considerable clinical applicability. SHG analysis might provide a unique tool for monitoring these structural changes of collagen.
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Affiliation(s)
- B M Kim
- Medical Technology Program, Lawrence Livermore National Laboratory, Livermore, California 94550, USA.
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Kim BM, Teffera S, Zeldin MD. Characterization of PM2.5 and PM10 in the South Coast Air Basin of southern California: Part 1--Spatial variations. J Air Waste Manag Assoc 2000; 50:2034-2044. [PMID: 11140132] [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] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
In December 1994, the South Coast Air Quality Management District (SCAQMD) initiated a comprehensive program, the PM10 Technical Enhancement Program (PTEP), to characterize fine PM in the South Coast Air Basin (SCAB). A 1-year special particulate monitoring project was conducted from January 1995 to February 1996 as part of the PTEP. Under this enhanced monitoring, HNO3, NH3, and speciated PM10 and PM2.5 concentrations were measured at five stations (Anaheim, downtown Los Angeles, Diamond Bar, Fontana, and Rubidoux) in the SCAB and at one background station at San Nicolas Island. PM2.5 and PM10 mass and 43 individual species were analyzed for a full chemical speciation of the particle data. The PTEP data indicate that the most abundant chemical components of PM10 and PM2.5 in the SCAB are NH4+ (8-9% of PM10 and 14-17% of PM2.5), NO3- (23-26% of PM10 and 28-41% of PM2.5), SO4- (6-11% of PM10 and 9-18% of PM2.5), organic carbon (OC) (15-19% of PM10 and 18-26% of PM2.5), and elemental carbon (EC) (5-8% of PM10 and 8-13% of PM2.5). On an annual average basis, PM2.5 comprises 52-59% of the SCAB PM10. Annual average PM10 and PM2.5 concentrations showed strong spatial variations, low at coastal sites and high at inland sites. Annual average PM10 concentrations varied from 40.8 micrograms/m3 at Anaheim to 76.8 micrograms/m3 at Rubidoux, while annual average PM2.5 concentrations varied from 21.7 micrograms/m3 at Anaheim to 39.8 micrograms/m3 at Rubidoux. The chemical characterizations of the PM2.5 and PM10 concentrations, as well as their spatial variations, were examined; the important findings are summarized in this paper, and the temporal variations are discussed in the companion paper.
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Affiliation(s)
- B M Kim
- South Coast Air Quality Management District, Planning and Policy, Diamond Bar, California, USA.
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Kim BM, Teffera S, Zeldin MD. Characterization of PM2.5 and PM10 in the South Coast Air Basin of southern California: Part. 2--Temporal variations. J Air Waste Manag Assoc 2000; 50:2045-2059. [PMID: 11140133] [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] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
The South Coast Air Quality Management District (SCAQMD) conducted a 1-year special particulate monitoring study from January 1995 to February 1996. This monitoring data indicates that high PM10 and PM2.5 concentrations were observed in the fall (October, November, and December), with November concentrations being the highest. During the rest of the year, PM2.5 and PM10 masses gradually increased from January to September. Monthly PM10 mass varied from 20 to 120 micrograms/m3, and monthly PM2.5 mass varied from 13 to 63 micrograms/m3. The PM2.5-to-PM10 ratio varied daily and ranged between 22 and 96%. Two types of high-PM days were observed. The first type was observed under fall stagnation conditions, which lead to high secondary species concentrations. The second type was observed under high wind conditions, which lead to high primary coarse particles of crustal components. The highest 24-hr average PM10 concentration (226.3 micrograms/m3) was observed at the Fontana station, while the highest PM2.5 concentration (129.3 micrograms/m3) was observed at the Diamond Bar station.
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Affiliation(s)
- B M Kim
- South Coast Air Quality Management District, Planning and Policy, Diamond Bar, California, USA.
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Moon J, Kim YS, Lee JY, Cho SJ, Song HK, Cho JH, Kim BM, Kim KK, Suh SW. Crystallization and preliminary X-ray diffraction analysis of Saccharomyces cerevisiae Ygr203p, a homologue of Acr2 arsenate reductase. Acta Crystallogr D Biol Crystallogr 2000; 56:778-80. [PMID: 10818363 DOI: 10.1107/s0907444900005278] [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] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
Ygr203p, a 148-residue protein encoded by the ygr203w gene of Saccharomyces cerevisiae, is a homologue of the yeast Acr2 arsenate reductase encoded by the acr2 (or ypr200c) gene. It also shows significant sequence similarity to the human cell-cycle control Cdc25 phosphatase family. It has been overexpressed in soluble form in Escherichia coli with a His(6) tag at its C-terminus. The recombinant protein has been crystallized at 296 K using sodium chloride as precipitant. The crystals belong to the orthorhombic space group P2(1)2(1)2(1), with unit-cell parameters a = 40.48, b = 50.95, c = 91.95 A. The asymmetric unit contains a monomer, giving a crystal volume per protein mass (V(m)) of 2.61 A(3) Da(-1) and a solvent content of 53.8%. The crystals diffract to better than 1.9 A resolution with Cu Kalpha X-rays. They are therefore suitable for high-resolution structure determination.
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Affiliation(s)
- J Moon
- Department of Chemistry, College of Natural Sciences, Seoul National University, South Korea
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