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Park S, Lee EJ, Kim JY, Bae YJ, Oh SH. Blood high mobility group box 1 levels are not a suitable biomarker for disease activity or severity in nonsegmental vitiligo. Clin Exp Dermatol 2021; 46:1597-1599. [PMID: 34080225 DOI: 10.1111/ced.14782] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2021] [Revised: 05/20/2021] [Accepted: 06/02/2021] [Indexed: 11/27/2022]
Affiliation(s)
- S Park
- Department of Dermatology and Cutaneous Biology Research Institute, Severance Hospital, Yonsei University College of Medicine, Seoul, Korea
| | - E J Lee
- Department of Dermatology and Cutaneous Biology Research Institute, Severance Hospital, Yonsei University College of Medicine, Seoul, Korea
| | - J Y Kim
- Department of Dermatology and Cutaneous Biology Research Institute, Severance Hospital, Yonsei University College of Medicine, Seoul, Korea
| | - Y J Bae
- Department of Dermatology and Cutaneous Biology Research Institute, Severance Hospital, Yonsei University College of Medicine, Seoul, Korea
| | - S H Oh
- Department of Dermatology and Cutaneous Biology Research Institute, Severance Hospital, Yonsei University College of Medicine, Seoul, Korea
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Bae YJ, Song YS, Kim JM, Choi BS, Nam Y, Choi JH, Lee WW, Kim JH. Determining the Degree of Dopaminergic Denervation Based on the Loss of Nigral Hyperintensity on SMWI in Parkinsonism. AJNR Am J Neuroradiol 2021; 42:681-687. [PMID: 33509919 DOI: 10.3174/ajnr.a6960] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2021] [Accepted: 10/21/2021] [Indexed: 01/23/2023]
Abstract
BACKGROUND AND PURPOSE Nigrostriatal dopaminergic function in patients with Parkinson disease can be assessed using 123I-2β-carbomethoxy-3β-(4-iodophenyl)-N-(3-fluoropropyl)-nortropan dopamine transporter (123I-FP-CIT) SPECT, and a good correlation has been demonstrated between nigral status on SWI and dopaminergic denervation on 123I-FP-CIT SPECT. Here, we aim to correlate quantified dopamine transporter attenuation on 123I-FP-CIT SPECT with nigrosome-1 status using susceptibility map-weighted imaging (SMWI). MATERIALS AND METHODS Between May 2017 and January 2018, consecutive patients with idiopathic Parkinson disease (n = 109) and control participants (n = 29) who underwent 123I-FP-CIT SPECT with concurrent 3T SWI were included. SMWI was generated from SWI. Two neuroradiologists evaluated nigral hyperintensity from nigrosome-1 on each side of the substantia nigra. Using consensus reading, we compared the 123I-FP-CIT-specific binding ratio according to nigral hyperintensity status and the 123I-FP-CIT specific binding ratio threshold to confirm the loss of nigral hyperintensity was determined using receiver operating characteristic curve analysis. RESULTS The concordance rate between SMWI and 123I-FP-CIT SPECT was 65.9%. The 123I-FP-CIT-specific binding ratios in the striatum, caudate nucleus, and putamen were significantly lower when nigral hyperintensity in the ipsilateral substantia nigra was absent than when present (all, P < .001). The 123I-FP-CIT-specific binding ratio threshold values for the determination of nigral hyperintensity loss were 2.56 in the striatum (area under the curve, 0.890), 3.07 in the caudate nucleus (0.830), and 2.36 in the putamen (0.887). CONCLUSIONS Nigral hyperintensity on SMWI showed high positive predictive value and low negative predictive value with dopaminergic degeneration on 123I-FP-CIT SPECT. In patients with Parkinson disease, the loss of nigral hyperintensity is prominent in patients with lower striatal specific binding ratios.
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Affiliation(s)
- Y J Bae
- From the Department of Radiology (Y.J.B., B.S.C., J.H.K.)
| | - Y S Song
- Nuclear Medicine (Y.S.S., W.W.L.)
| | - J-M Kim
- Neurology (J.-M.K., J.-H.C.), Seoul National University Bundang Hospital, Seoul National University College of Medicine, Seongnam, Korea
| | - B S Choi
- From the Department of Radiology (Y.J.B., B.S.C., J.H.K.)
| | - Y Nam
- Division of Biomedical Engineering (Y.N.), Hankuk University of Foreign Studies, Gyeonggi-do, Republic of Korea
| | - J-H Choi
- Neurology (J.-M.K., J.-H.C.), Seoul National University Bundang Hospital, Seoul National University College of Medicine, Seongnam, Korea
| | - W W Lee
- Nuclear Medicine (Y.S.S., W.W.L.)
- Medical Research Center, Institute of Radiation Medicine (W.W.L.), Seoul National University, Seoul, Republic of Korea
| | - J H Kim
- From the Department of Radiology (Y.J.B., B.S.C., J.H.K.)
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Kim YJ, Jeong WJ, Bae YJ, Kim H, Choi BS, Jung YH, Baik SH, Sunwoo L, Kim JH. MRI-Based Assessment of the Pharyngeal Constrictor Muscle as a Predictor of Surgical Margin after Transoral Robotic Surgery in HPV-Positive Tonsillar Cancer. AJNR Am J Neuroradiol 2020; 41:2320-2326. [PMID: 33060104 DOI: 10.3174/ajnr.a6806] [Citation(s) in RCA: 4] [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] [Received: 01/28/2020] [Accepted: 07/29/2020] [Indexed: 11/07/2022]
Abstract
BACKGROUND AND PURPOSE Transoral robotic surgery is an emerging strategy for treating human papillomavirus-positive cancers, but the role of MR imaging in predicting the surgical outcome has not been established. We aimed to identify preoperative MR imaging characteristics that predispose the outcome of transoral robotic surgery toward an insecure (positive or close) surgical margin in human papillomavirus-positive tonsillar squamous cell carcinoma. MATERIALS AND METHODS Between December 2012 and May 2019, sixty-nine patients underwent transoral robotic surgery at our institution. Among these, 29 who were diagnosed with human papillomavirus-positive tonsillar squamous cell carcinoma, did not receive neoadjuvant treatment, underwent preoperative 3T MR imaging, and had postoperative pathologic reports and were included in this retrospective study. Two neuroradiologists evaluated the preoperative MR imaging scans to determine the tumor spread through the pharyngeal constrictor muscle using a 5-point scale: 1, normal constrictor; 2, bulging constrictor; 3, thinning constrictor; 4, obscured constrictor; and 5, tumor protrusion into the parapharyngeal fat. The risk of an insecure surgical margin (involved or <1 mm) according to the MR imaging scores was predicted using logistic regression with the Firth correction. RESULTS The interobserver agreement for the MR imaging scores was excellent (κ = 0.955, P < .001). A score of ≥4 could predict an insecure margin with 87.5% sensitivity and 92.3% specificity (area under the curve = 0.899) and was the only significant factor associated with an insecure margin in the multivariable analysis (OR, 6.59; 95% CI, 3.11-22.28; P < .001). CONCLUSIONS The pre-transoral robotic surgery MR imaging scoring system for the pharyngeal constrictor muscle is a promising predictor of the surgical margin in human papillomavirus-positive tonsillar squamous cell carcinoma.
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Affiliation(s)
- Y J Kim
- From the Department of Radiology (Y.J.K., Y.J.B., B.S.C., S.H.B., L.S., J.H.K.)
| | - W-J Jeong
- Otolaryngology-Head and Neck Surgery (W.-J.J., Y.H.J.)
| | - Y J Bae
- From the Department of Radiology (Y.J.K., Y.J.B., B.S.C., S.H.B., L.S., J.H.K.)
| | - H Kim
- Pathology (H.K.), Seoul National University Bundang Hospital, Seongnam, Republic of Korea
| | - B S Choi
- From the Department of Radiology (Y.J.K., Y.J.B., B.S.C., S.H.B., L.S., J.H.K.)
| | - Y H Jung
- Otolaryngology-Head and Neck Surgery (W.-J.J., Y.H.J.)
| | - S H Baik
- From the Department of Radiology (Y.J.K., Y.J.B., B.S.C., S.H.B., L.S., J.H.K.)
| | - L Sunwoo
- From the Department of Radiology (Y.J.K., Y.J.B., B.S.C., S.H.B., L.S., J.H.K.)
| | - J H Kim
- From the Department of Radiology (Y.J.K., Y.J.B., B.S.C., S.H.B., L.S., J.H.K.)
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Woo HG, Sunwoo L, Jung C, Kim BJ, Han MK, Bae HJ, Bae YJ, Choi BS, Kim JH. Feasibility of Permanent Stenting with Solitaire FR as a Rescue Treatment for the Reperfusion of Acute Intracranial Artery Occlusion. AJNR Am J Neuroradiol 2017; 39:331-336. [PMID: 29242362 DOI: 10.3174/ajnr.a5477] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2017] [Accepted: 10/04/2017] [Indexed: 11/07/2022]
Abstract
BACKGROUND AND PURPOSE The Solitaire FR can be used not only as a tool for mechanical thrombectomy but also as a detachable permanent stent. Our aim was to assess the feasibility and safety of permanent stent placement with the Solitaire FR compared with other self-expanding stents for intracranial artery recanalization for acute ischemic stroke. MATERIALS AND METHODS From January 2011 through January 2016, we retrospectively selected 2979 patients with acute ischemic stroke. Among them, 27 patients who underwent permanent stent placement (13 patients with the Solitaire FR [Solitaire group] and 14 patients with other self-expanding stents [other stent group]) were enrolled. The postprocedural modified TICI grade and angiographic and clinical outcomes were assessed. The safety and efficacy of permanent stent placement of the Solitaire FR for acute large-artery occlusion were evaluated. RESULTS Stent placement was successful in all cases. Modified TICI 2b-3 reperfusion was noted in 84.6% of the Solitaire group and in 78.6% of the other stent group. Procedural time was significantly shorter in the Solitaire group than in the other stent group (P = .022). Shorter procedural time was correlated with favorable outcome (ρ = 0.46, P = .035). No significant differences were found in the modified TICI grade, NIHSS score, mRS, and hemorrhagic transformation rate between the 2 groups. The acute in-stent thrombosis rate at discharge was significantly lower when a glycoprotein IIb/IIIa inhibitor was injected during the procedure (P = .013). CONCLUSIONS Permanent stent placement with the Solitaire FR compared with other self-expanding stents appears to be feasible and safe as a rescue tool for refractory intra-arterial therapy.
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Affiliation(s)
- H G Woo
- From the Departments of Radiology (H.G.W., L.S., C.J., Y.J.B., B.S.C., J.H.K.)
| | - L Sunwoo
- From the Departments of Radiology (H.G.W., L.S., C.J., Y.J.B., B.S.C., J.H.K.)
| | - C Jung
- From the Departments of Radiology (H.G.W., L.S., C.J., Y.J.B., B.S.C., J.H.K.)
| | - B J Kim
- Neurology (B.J.K., M.-K.H., H.-J.B.), Seoul National University Bundang Hospital, Bundang, Seongnam, Korea
| | - M-K Han
- Neurology (B.J.K., M.-K.H., H.-J.B.), Seoul National University Bundang Hospital, Bundang, Seongnam, Korea
| | - H-J Bae
- Neurology (B.J.K., M.-K.H., H.-J.B.), Seoul National University Bundang Hospital, Bundang, Seongnam, Korea
| | - Y J Bae
- From the Departments of Radiology (H.G.W., L.S., C.J., Y.J.B., B.S.C., J.H.K.)
| | - B S Choi
- From the Departments of Radiology (H.G.W., L.S., C.J., Y.J.B., B.S.C., J.H.K.)
| | - J H Kim
- From the Departments of Radiology (H.G.W., L.S., C.J., Y.J.B., B.S.C., J.H.K.)
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Bae YJ, Choi BS, Jeong HK, Sunwoo L, Jung C, Kim JH. Diffusion-Weighted Imaging of the Head and Neck: Influence of Fat-Suppression Technique and Multishot 2D Navigated Interleaved Acquisitions. AJNR Am J Neuroradiol 2017; 39:145-150. [PMID: 29122759 DOI: 10.3174/ajnr.a5426] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2017] [Accepted: 08/19/2017] [Indexed: 12/18/2022]
Abstract
BACKGROUND AND PURPOSE DWI of the head and neck can reveal valuable information, but the effects of fat suppression and multishot acquisition on image quality have not been thoroughly investigated. We aimed to comprehensively compare the quality of head and neck DWI at 3T using 2 fat-suppression techniques, STIR, and spectral presaturation with inversion recovery, which were used with both single- and multishot EPI. MATERIALS AND METHODS Sixty-five study participants underwent 3 DWI sequences of single-shot EPI-STIR, single-shot EPI-spectral presaturation with inversion recovery, and multishot EPI-spectral presaturation with inversion recovery of the head and neck. In multiple anatomic regions, 2 independent readers assessed 5-point visual scores for fat-suppression uniformity and image distortion, and 1 reader measured the contrast-to-noise ratio and ADC. RESULTS The mean visual score for fat-suppression uniformity was higher in single-shot EPI-STIR than in other sequences (all regions except for the orbital region, P < .05). The mean visual score for image distortion was higher in multishot EPI-spectral presaturation with inversion recovery than in single-shot EPI sequences (all regions, P < .001). Contrast-to-noise ratio was mostly lower in single-shot EPI-STIR than in other sequences (P < .001), and ADC was significantly higher in multishot EPI-spectral presaturation with inversion recovery than in single-shot EPI sequences (P ≤ .001). CONCLUSIONS Overall, multishot EPI-spectral presaturation with inversion recovery provided the best image quality, with relatively homogeneous fat suppression, less image distortion than single-shot EPI sequences, and higher contrast-to-noise ratio than single-shot EPI-STIR. The measured ADC values can be higher in multishot EPI-spectral presaturation with inversion recovery, which necessitates cautious application of the previously reported ADC values to clinical settings.
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Affiliation(s)
- Y J Bae
- From the Department of Radiology (Y.J.B., B.S.C., L.S., C.J., J.H.K.), Seoul National University Bundang Hospital, Seongnam, Republic of Korea
| | - B S Choi
- From the Department of Radiology (Y.J.B., B.S.C., L.S., C.J., J.H.K.), Seoul National University Bundang Hospital, Seongnam, Republic of Korea
| | - H-K Jeong
- Philips Korea (H.-K.J.), Seoul, Republic of Korea
| | - L Sunwoo
- From the Department of Radiology (Y.J.B., B.S.C., L.S., C.J., J.H.K.), Seoul National University Bundang Hospital, Seongnam, Republic of Korea
| | - C Jung
- From the Department of Radiology (Y.J.B., B.S.C., L.S., C.J., J.H.K.), Seoul National University Bundang Hospital, Seongnam, Republic of Korea
| | - J H Kim
- From the Department of Radiology (Y.J.B., B.S.C., L.S., C.J., J.H.K.), Seoul National University Bundang Hospital, Seongnam, Republic of Korea
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Bae YJ, Jeon YJ, Choi BS, Koo JW, Song JJ. The Role of MRI in Diagnosing Neurovascular Compression of the Cochlear Nerve Resulting in Typewriter Tinnitus. AJNR Am J Neuroradiol 2017; 38:1212-1217. [PMID: 28385885 DOI: 10.3174/ajnr.a5156] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2016] [Accepted: 01/25/2017] [Indexed: 12/19/2022]
Abstract
BACKGROUND AND PURPOSE Typewriter tinnitus, a symptom characterized by paroxysmal attacks of staccato sounds, has been thought to be caused by neurovascular compression of the cochlear nerve, but the correlation between radiologic evidence of neurovascular compression of the cochlear nerve and symptom presentation has not been thoroughly investigated. The purpose of this study was to examine whether radiologic evidence of neurovascular compression of the cochlear nerve is pathognomonic in typewriter tinnitus. MATERIALS AND METHODS Fifteen carbamazepine-responding patients with typewriter tinnitus and 8 control subjects were evaluated with a 3D T2-weighted volume isotropic turbo spin-echo acquisition sequence. Groups 1 (16 symptomatic sides), 2 (14 asymptomatic sides), and 3 (16 control sides) were compared with regard to the anatomic relation between the vascular loop and the internal auditory canal and the presence of neurovascular compression of the cochlear nerve with/without angulation/indentation. RESULTS The anatomic location of the vascular loop was not significantly different among the 3 groups (all, P > .05). Meanwhile, neurovascular compression of the cochlear nerve on MR imaging was significantly higher in group 1 than in group 3 (P = .032). However, considerable false-positive (no symptoms with neurovascular compression of the cochlear nerve on MR imaging) and false-negative (typewriter tinnitus without demonstrable neurovascular compression of the cochlear nerve) findings were also observed. CONCLUSIONS Neurovascular compression of the cochlear nerve was more frequently detected on the symptomatic side of patients with typewriter tinnitus compared with the asymptomatic side of these patients or on both sides of control subjects on MR imaging. However, considering false-positive and false-negative findings, meticulous history-taking and the response to the initial carbamazepine trial should be regarded as more reliable diagnostic clues than radiologic evidence of neurovascular compression of the cochlear nerve.
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Affiliation(s)
- Y J Bae
- From the Departments of Radiology (Y.J.B., B.S.C.)
| | - Y J Jeon
- Otorhinolaryngology-Head and Neck Surgery (Y.J.J., J.-W.K., J.-J.S.), Seoul National University Bundang Hospital, Seongnam, Korea
| | - B S Choi
- From the Departments of Radiology (Y.J.B., B.S.C.)
| | - J-W Koo
- Otorhinolaryngology-Head and Neck Surgery (Y.J.J., J.-W.K., J.-J.S.), Seoul National University Bundang Hospital, Seongnam, Korea
| | - J-J Song
- Otorhinolaryngology-Head and Neck Surgery (Y.J.J., J.-W.K., J.-J.S.), Seoul National University Bundang Hospital, Seongnam, Korea.
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Bae YJ, Jaeger S, Stadelmann S, Klein AM, Hiemisch A, Kiess W, Ceglarek U, Gaudl A, Schaab M, Klitzing KV, Thiery J, Döhnert M, Kratzsch J. Comparison of salivary cortisol and cortisone in association with alpha-amylase in children and adolescents with psychiatric disorders. Exp Clin Endocrinol Diabetes 2015. [DOI: 10.1055/s-0035-1547625] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Bae YJ, Jung C, Kim JH, Choi BS, Kim E, Han MK, Bae HJ, Han MH. Potential for the use of the Solitaire stent for recanalization of middle cerebral artery occlusion without a susceptibility vessel sign. AJNR Am J Neuroradiol 2014; 35:149-55. [PMID: 23744693 DOI: 10.3174/ajnr.a3562] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
BACKGROUND AND PURPOSE Absence of the MCA susceptibility vessel sign (negative MCA susceptibility vessel sign) on gradient recalled-echo MR imaging in acute stroke is commonly associated with in situ stenosis and thrombotic occlusion. We evaluated the effectiveness and safety of the Solitaire stent as the first-line device for the recanalization of MCA occlusion with a negative MCA susceptibility vessel sign. MATERIALS AND METHODS Thirty-eight consecutive patients presenting with acute ischemic stroke due to MCA occlusion were treated by using the Solitaire AB stent alone or combined with thrombolytic drugs. Among these patients, 11 (7 men and 4 women; median age, 70 years; range, 49-89 years) who underwent multimodal stroke MR imaging before the endovascular procedure and had no MCA susceptibility vessel sign on the initial gradient recalled-echo MR imaging were included in this study. The primary end point was the recanalization of the occluded artery evaluated by the arterial occlusive lesion score. Clinical outcome was assessed at discharge and 90 days, as was the degree of residual MCA stenosis or reocclusion. RESULTS Successful recanalization (arterial occlusive lesion score ≥ II) without balloon angioplasty was obtained in 9 patients (81.8%). Six patients (54.5%) had an mRS score of ≤2 at 90 days. After a median of 147 days, no patient showed reocclusion on follow-up imaging. There were no symptomatic intracerebral hemorrhages. CONCLUSIONS The Solitaire stent is a feasible tool as the first-line device for multimodal endovascular recanalization therapy in acute ischemic stroke with a negative MCA susceptibility vessel sign. It has a good rate of successful and complete recanalization and is a fast yet safe procedure.
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Kang JG, Kim HJ, Jeong YK, Nah MK, Park C, Bae YJ, Lee SW, Kim IT. Optical and Conformational Studies on Benzobisthiazole Derivatives. J Phys Chem B 2010; 114:3791-8. [DOI: 10.1021/jp912018h] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Jun-Gill Kang
- Department of Chemistry, Chungnam National University, Daejeon 305-764, Republic of Korea, and Department of Chemistry, Kwangwoon University, 447-1 Wolgye-Dong, Nowon-Ku, Seoul 139-701, Republic of Korea
| | - Hyun-Joon Kim
- Department of Chemistry, Chungnam National University, Daejeon 305-764, Republic of Korea, and Department of Chemistry, Kwangwoon University, 447-1 Wolgye-Dong, Nowon-Ku, Seoul 139-701, Republic of Korea
| | - Yong-Kwang Jeong
- Department of Chemistry, Chungnam National University, Daejeon 305-764, Republic of Korea, and Department of Chemistry, Kwangwoon University, 447-1 Wolgye-Dong, Nowon-Ku, Seoul 139-701, Republic of Korea
| | - Min-Kook Nah
- Department of Chemistry, Chungnam National University, Daejeon 305-764, Republic of Korea, and Department of Chemistry, Kwangwoon University, 447-1 Wolgye-Dong, Nowon-Ku, Seoul 139-701, Republic of Korea
| | - Changmoon Park
- Department of Chemistry, Chungnam National University, Daejeon 305-764, Republic of Korea, and Department of Chemistry, Kwangwoon University, 447-1 Wolgye-Dong, Nowon-Ku, Seoul 139-701, Republic of Korea
| | - Young Ju Bae
- Department of Chemistry, Chungnam National University, Daejeon 305-764, Republic of Korea, and Department of Chemistry, Kwangwoon University, 447-1 Wolgye-Dong, Nowon-Ku, Seoul 139-701, Republic of Korea
| | - Sang Woo Lee
- Department of Chemistry, Chungnam National University, Daejeon 305-764, Republic of Korea, and Department of Chemistry, Kwangwoon University, 447-1 Wolgye-Dong, Nowon-Ku, Seoul 139-701, Republic of Korea
| | - In Tae Kim
- Department of Chemistry, Chungnam National University, Daejeon 305-764, Republic of Korea, and Department of Chemistry, Kwangwoon University, 447-1 Wolgye-Dong, Nowon-Ku, Seoul 139-701, Republic of Korea
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Yun S, Möller A, Chae SK, Hong WP, Bae YJ, Bowtell DDL, Ryu SH, Suh PG. Siah proteins induce the epidermal growth factor-dependent degradation of phospholipase Cepsilon. J Biol Chem 2007; 283:1034-42. [PMID: 17998205 DOI: 10.1074/jbc.m705874200] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Phospholipase Cepsilon (PLCepsilon) is activated by various growth factors or G-protein-coupled receptor ligands via different activation mechanisms. The Ras association (RA) domain of PLCepsilon is known to be important for its ability to bind with Ras-family GTPase upon growth factor stimulation. In the present study, we identified Siah1 and Siah2 as novel binding partners of the PLCepsilon RA domain. Both Siah1 and Siah2 interacted with the RA2 domain of PLCepsilon, and the mutation of Lys-2186 of the PLCepsilon RA2 domain abolished this association. Moreover, Siah induced the ubiquitination and degradation of PLCepsilon upon epidermal growth factor (EGF) stimulation, and Siah proteins were phosphorylated on multiple tyrosine residues via an Src-dependent pathway upon EGF treatment. The Src inhibitor abolished the EGF-dependent ubiquitination of PLCepsilon, and the Siah1 phosphorylation-deficient mutant could not increase the EGF-dependent ubiquitination and degradation of PLCepsilon. The EGF-dependent degradation of PLCepsilon was blocked in mouse embryonic fibroblast (MEF) cells derived from Siah1a/Siah2 double knockout mice, and the extrinsic expression of wild-type Siah1 restored the degradation of PLCepsilon, whereas the phosphorylation-deficient mutant did not. Siah1 expression abolished PLCepsilon-dependent potentiation of EGF-dependent cell growth. In addition, the expression of wild-type Siah1 in Siah1a/Siah2-double knockout MEF cells inhibited EGF-dependent cell growth, and this inhibition was abolished by PLCepsilon knockdown. Our results suggest that the Siah-dependent degradation of PLCepsilon plays a role in the regulation of growth factor-dependent cell growth.
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Affiliation(s)
- Sanguk Yun
- Department of Life Science, Division of Molecular and Life Science, Pohang University of Science and Technology, Pohang, Kyung-Buk 790-784, Republic of Korea
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Han W, Han MR, Kang JJ, Bae JY, Lee JH, Bae YJ, Lee JE, Shin HJ, Hwang KT, Hwang SE, Kim SW, Noh DY. Genomic alterations identified by array comparative genomic hybridization as prognostic markers in tamoxifen-treated estrogen receptor-positive breast cancer. BMC Cancer 2006; 6:92. [PMID: 16608533 PMCID: PMC1459182 DOI: 10.1186/1471-2407-6-92] [Citation(s) in RCA: 52] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2005] [Accepted: 04/12/2006] [Indexed: 01/08/2023] Open
Abstract
BACKGROUND A considerable proportion of estrogen receptor (ER)-positive breast cancer recurs despite tamoxifen treatment, which is a serious problem commonly encountered in clinical practice. We tried to find novel prognostic markers in this subtype of breast cancer. METHODS We performed array comparative genomic hybridization (CGH) with 1,440 human bacterial artificial chromosome (BAC) clones to assess copy number changes in 28 fresh-frozen ER-positive breast cancer tissues. All of the patients included had received at least 1 year of tamoxifen treatment. Nine patients had distant recurrence within 5 years (Recurrence group) of diagnosis and 19 patients were alive without disease at least 5 years after diagnosis (Non-recurrence group). RESULTS Potential prognostic variables were comparable between the two groups. In an unsupervised clustering analysis, samples from each group were well separated. The most common regions of gain in all samples were 1q32.1, 17q23.3, 8q24.11, 17q12-q21.1, and 8p11.21, and the most common regions of loss were 6q14.1-q16.3, 11q21-q24.3, and 13q13.2-q14.3, as called by CGH-Explorer software. The average frequency of copy number changes was similar between the two groups. The most significant chromosomal alterations found more often in the Recurrence group using two different statistical methods were loss of 11p15.5-p15.4, 1p36.33, 11q13.1, and 11p11.2 (adjusted p values < 0.001). In subgroup analysis according to lymph node status, loss of 11p15 and 1p36 were found more often in Recurrence group with borderline significance within the lymph node positive patients (adjusted p = 0.052). CONCLUSION Our array CGH analysis with BAC clones could detect various genomic alterations in ER-positive breast cancers, and Recurrence group samples showed a significantly different pattern of DNA copy number changes than did Non-recurrence group samples.
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MESH Headings
- Adult
- Aged
- Antineoplastic Agents, Hormonal/therapeutic use
- Antineoplastic Combined Chemotherapy Protocols/administration & dosage
- Antineoplastic Combined Chemotherapy Protocols/therapeutic use
- Breast Neoplasms/chemistry
- Breast Neoplasms/drug therapy
- Breast Neoplasms/genetics
- Breast Neoplasms/radiotherapy
- Breast Neoplasms/surgery
- Carcinoma, Ductal, Breast/chemistry
- Carcinoma, Ductal, Breast/drug therapy
- Carcinoma, Ductal, Breast/genetics
- Carcinoma, Ductal, Breast/radiotherapy
- Carcinoma, Ductal, Breast/secondary
- Carcinoma, Ductal, Breast/surgery
- Chemotherapy, Adjuvant
- Chromosomes, Artificial, Bacterial
- Cluster Analysis
- Combined Modality Therapy
- Cyclophosphamide/administration & dosage
- DNA, Neoplasm/genetics
- Disease-Free Survival
- Estrogen Receptor Modulators/therapeutic use
- Estrogens
- Female
- Fluorouracil/administration & dosage
- Humans
- Life Tables
- Mastectomy
- Methotrexate/administration & dosage
- Middle Aged
- Neoplasm Metastasis
- Neoplasm Proteins/analysis
- Neoplasms, Hormone-Dependent/chemistry
- Neoplasms, Hormone-Dependent/drug therapy
- Neoplasms, Hormone-Dependent/genetics
- Neoplasms, Hormone-Dependent/radiotherapy
- Neoplasms, Hormone-Dependent/surgery
- Nucleic Acid Hybridization
- Oligonucleotide Array Sequence Analysis
- Prognosis
- Radiotherapy, Adjuvant
- Receptors, Estrogen/analysis
- Tamoxifen/therapeutic use
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Affiliation(s)
- Wonshik Han
- Department of Surgery, Seoul National University College of Medicine, Seoul, Korea
| | - Mi-Ryung Han
- Cancer Research Institute, Seoul National University College of Medicine, Seoul, Korea
| | | | - Ji-Yeon Bae
- Cancer Research Institute, Seoul National University College of Medicine, Seoul, Korea
| | | | | | - Jeong Eon Lee
- Department of Surgery, Seoul National University College of Medicine, Seoul, Korea
| | - Hyuk-Jae Shin
- Department of Surgery, Seoul National University College of Medicine, Seoul, Korea
| | - Ki-Tae Hwang
- Department of Surgery, Seoul National University College of Medicine, Seoul, Korea
| | - Sung-Eun Hwang
- Department of Surgery, Seoul National University College of Medicine, Seoul, Korea
| | - Sung-Won Kim
- Department of Surgery, Seoul National University College of Medicine, Seoul, Korea
| | - Dong-Young Noh
- Department of Surgery, Seoul National University College of Medicine, Seoul, Korea
- Cancer Research Institute, Seoul National University College of Medicine, Seoul, Korea
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12
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Park KS, Bae YJ, Yeau SH, Kang SJ. Cloning and sequence analysis of Gpdh in Callosobruchus chinensis (Coleoptera: Bruchidae). Mol Cells 2001; 11:405-10. [PMID: 11459233] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/20/2023] Open
Abstract
The Sn-Glycerol-3-phosphate dehydrogenase (GPDH: NAD+ 2-oxidoreductase, EC 1.1.1.8) gene of C. chinensis was cloned and its nucleotide sequence was analyzed. The gene was obtained by screening a genomic library with Drosophila melanogaster Gpdh and PCR amplification. The 5,126 bp gene obtained is comprised of one 5' untranslated region, eight exons, seven introns, and three 3' untranslated regions. Comparison of Gpdh of D. melanogaster with that of C. chinensis showed a 89.9% identity in the coding region, 70% in the intron, 79% in the entire nucleotide sequence, and 83.2% in the deduced amino acid sequence. The transcription initiation site is located 33 nucleotides upstream of the initiation codon, and the sequence analysis of the promoter region showed TATA and CAAT boxes at the 5' end. The stop codon (TAA) and polyadenylation signal (AATAAA) are located at the 3' end of each of the exons 6 to 8. These findings show that GPDH isozymes in C. chinensis are produced by the alternative processing of 3' exons. The occurrence of the three transcripts was proven by RT-PCR using synthetic oligonucleotides complementary to the predicted unique 3' regions. Compared to the D. melanogaster GPDH isozymes, GPDH-1, -2, and -3, C. chinensis GPDH showed 83.6%, 83%, and 84% identities, respectively.
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Affiliation(s)
- K S Park
- Department of Science Education, College of Education, Ewha Womans University, Seoul, Korea
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13
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Abstract
Many types of meniscal anomalies have been reported. The authors encountered two cases of anomalous insertion of the anterior horn of the medial menisci to the lateral femoral condyle, which ran up along the course of the anterior cruciate ligament (ACL), but was independent of the ACL. These anomalies were noted during arthroscopic examination and surgery of the ipsilateral knee for a torn discoid meniscus and a patellar fracture. A 34-year-old woman had a horizontal tear of the lateral discoid meniscus. We performed arthroscopic partial meniscectomy of the inner torn portion of the lateral discoid meniscus and contoured it to resemble a normal meniscus. An anomalous insertion of the medial meniscus was found on examination of the joint during surgery. A 32-year-old man had a patellar fracture and we performed reduction under arthroscopy and internal fixation with cannulated screws. The same anomalous insertion of the medial meniscus was also found on examination of the joint during surgery. We report the cases with a review of the literature.
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Affiliation(s)
- Y B Jung
- Department of Orthopaedic Surgery, Yong San General Hospital, Chung-Ang University, Seoul, Korea
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14
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Balch CM, Riley LB, Bae YJ, Salmeron MA, Platsoucas CD, von Eschenbach A, Itoh K. Patterns of human tumor-infiltrating lymphocytes in 120 human cancers. Arch Surg 1990; 125:200-5. [PMID: 1689143 DOI: 10.1001/archsurg.1990.01410140078012] [Citation(s) in RCA: 189] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Tumor-infiltrating lymphocytes from 120 samples of human cancers, including melanoma, renal cell carcinoma, breast cancer, sarcoma, and colon cancer, were examined. The percentage of lymphocytes recovered from the cancer varied widely; that of renal cell carcinoma was higher than that of breast or colon cancer (65% vs 45%), which was higher than that of melanomas or sarcomas (30% to 35%). The types of lymphocytes before and after interleukin 2 activation showed specific patterns. CD4+ helper T cells predominated in all tumors except melanomas, which had more CD8+ cytotoxic T cells. CD16+ natural killer cells were recovered in renal cell carcinoma and sarcomas. Three different cytotoxic lymphocytes were identified among interleukin 2-activated tumor-infiltrating lymphocytes: (1) CD3+ CD16- cytotoxic T lymphocytes with cytotoxicity restricted to autologous tumor cells in melanomas, (2) CD3-CD16+ natural killer cells with vigorous major histocompatibility complex-nonrestricted cytotoxicity in renal cell carcinoma, and (3) CD3+ CD16- T cells with modest levels of major histocompatibility complex-nonstricted cytotoxicity in all cancers except melanomas. Thus, there was considerable diversity of tumor-infiltrating lymphocytes among these histologically distinct tumors with respect to magnitude of lymphocyte infiltration, phenotypic expression, and functional capacity.
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Affiliation(s)
- C M Balch
- Department of General Surgery, University of Texas M.D. Anderson Cancer Center, Houston 77030
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