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Park D, Lee D, Kim Y, Park Y, Lee YJ, Lee JE, Yeo MK, Kang MW, Chong Y, Han SJ, Choi J, Park JE, Koh Y, Lee J, Park Y, Kim R, Lee JS, Choi J, Lee SH, Ku B, Kang DH, Chung C. Cryobiopsy: A Breakthrough Strategy for Clinical Utilization of Lung Cancer Organoids. Cells 2023; 12:1854. [PMID: 37508518 PMCID: PMC10377875 DOI: 10.3390/cells12141854] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2023] [Revised: 07/05/2023] [Accepted: 07/07/2023] [Indexed: 07/30/2023] Open
Abstract
One major challenge associated with lung cancer organoids (LCOs) is their predominant derivation from surgical specimens of patients with early-stage lung cancer. However, patients with advanced lung cancer, who are in need of chemotherapy, often cannot undergo surgery. Therefore, there is an urgent need to successfully generate LCOs from biopsy specimens. Conventional lung biopsy techniques, such as transthoracic needle biopsy and forceps biopsy, only yield small amounts of lung tissue, resulting in a low success rate for culturing LCOs from biopsy samples. Furthermore, potential complications, like bleeding and pneumothorax, make it difficult to obtain sufficient tissue. Another critical issue is the overgrowth of normal lung cells in later passages of LCO culture, and the optimal culture conditions for LCOs are yet to be determined. To address these limitations, we attempted to create LCOs from cryobiopsy specimens obtained from patients with lung cancer (n = 113). Overall, the initial success rate of establishing LCOs from cryobiopsy samples was 40.7% (n = 46). Transbronchial cryobiopsy enables the retrieval of significantly larger amounts of lung tissue than bronchoscopic forceps biopsy. Additionally, cryobiopsy can be employed for peripheral lesions, and it is aided via radial endobronchial ultrasonography. This study significantly improved the success rate of LCO culture and demonstrated that the LCOs retained characteristics that resembled the primary tumors. Single-cell RNA sequencing confirmed high cancer cell purity in early passages of LCOs derived from patients with advanced lung cancer. Furthermore, the three-dimensional structure and intracellular components of LCOs were characterized using three-dimensional holotomography. Finally, drug screening was performed using a specialized micropillar culture system with cryobiopsy-derived LCOs. LCOs derived from cryobiopsy specimens offer a promising solution to the critical limitations of conventional LCOs. Cryobiopsy can be applied to patients with lung cancer at all stages, including those with peripheral lesions, and can provide sufficient cells for LCO generation. Therefore, we anticipate that cryobiopsy will serve as a breakthrough strategy for the clinical application of LCOs in all stages of lung cancer.
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Affiliation(s)
- Dongil Park
- Division of Pulmonology and Critical Care Medicine, Department of Internal Medicine, College of Medicine, Chungnam National University, Daejeon 34134, Republic of Korea
| | - Dahye Lee
- Division of Pulmonology and Critical Care Medicine, Department of Internal Medicine, College of Medicine, Chungnam National University, Daejeon 34134, Republic of Korea
| | - Yoonjoo Kim
- Division of Pulmonology and Critical Care Medicine, Department of Internal Medicine, College of Medicine, Chungnam National University, Daejeon 34134, Republic of Korea
| | - Yeonhee Park
- Division of Pulmonary and Critical Care Medicine, Department of Internal Medicine, Daejeon St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul 34943, Republic of Korea
| | - Yeon-Jae Lee
- Division of Pulmonology and Critical Care Medicine, Department of Internal Medicine, College of Medicine, Chungnam National University, Daejeon 34134, Republic of Korea
| | - Jeong Eun Lee
- Division of Pulmonology and Critical Care Medicine, Department of Internal Medicine, College of Medicine, Chungnam National University, Daejeon 34134, Republic of Korea
| | - Min-Kyung Yeo
- Department of Pathology, College of Medicine, Chungnam National University, Daejeon 34134, Republic of Korea
| | - Min-Woong Kang
- Thoracic and Cardiovascular Surgery, School of Medicine, Chungnam National University, Munhwa-ro 282, Jung-Gu, Daejeon 35015, Republic of Korea
| | - Yooyoung Chong
- Thoracic and Cardiovascular Surgery, School of Medicine, Chungnam National University, Munhwa-ro 282, Jung-Gu, Daejeon 35015, Republic of Korea
| | - Sung Joon Han
- Thoracic and Cardiovascular Surgery, School of Medicine, Chungnam National University, Munhwa-ro 282, Jung-Gu, Daejeon 35015, Republic of Korea
| | - Jinwook Choi
- School of Life Science, Gwangju Institute of Science and Technology, Gwangju 61005, Republic of Korea
| | - Jong-Eun Park
- Graduate School of Medical Science and Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Republic of Korea
| | - Yongjun Koh
- Graduate School of Medical Science and Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Republic of Korea
| | | | - YongKeun Park
- Tomocube Inc., Daejeon 34141, Republic of Korea
- Department of Physics, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Republic of Korea
| | - Ryul Kim
- GENOME INSIGHT Inc., Daejeon 34051, Republic of Korea
| | - Jeong Seok Lee
- Graduate School of Medical Science and Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Republic of Korea
- GENOME INSIGHT Inc., Daejeon 34051, Republic of Korea
| | - Jimin Choi
- Central R&D Center, Medical & Bio Decision Co., Ltd., Suwon 16229, Republic of Korea
| | - Sang-Hyun Lee
- Central R&D Center, Medical & Bio Decision Co., Ltd., Suwon 16229, Republic of Korea
| | - Bosung Ku
- Central R&D Center, Medical & Bio Decision Co., Ltd., Suwon 16229, Republic of Korea
| | - Da Hyun Kang
- Division of Pulmonology and Critical Care Medicine, Department of Internal Medicine, College of Medicine, Chungnam National University, Daejeon 34134, Republic of Korea
| | - Chaeuk Chung
- Division of Pulmonology and Critical Care Medicine, Department of Internal Medicine, College of Medicine, Chungnam National University, Daejeon 34134, Republic of Korea
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Oh C, Chong Y, Kang MW, Bae J, Lee S, Jo Y, Lee J, Baek S, Jung J, Kim YH, Hong B. Comparison between costotransverse foramen block and thoracic paravertebral block for VATS pulmonary resection: A randomized noninferiority trial. J Clin Anesth 2023; 88:111127. [PMID: 37207551 DOI: 10.1016/j.jclinane.2023.111127] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2023] [Revised: 04/16/2023] [Accepted: 04/18/2023] [Indexed: 05/21/2023]
Abstract
STUDY OBJECTIVE The present study assessed whether costotransverse foramen block (CTFB) is noninferior to thoracic paravertebral block (TPVB) for postoperative analgesia in video-assisted thoracoscopic surgery (VATS) pulmonary resection. DESIGN Single-center, double-blinded, randomized, non-inferiority trial. SETTING Operating room and intensive care unit or ward in a tertiary hospital. PATIENTS Patients aged 20 to 80 years with American Society of Anesthesiology physical status 1 to 3 scheduled for elective VATS pulmonary resection. INTERVENTIONS Sixty patients were randomly allocated 1:1 to receive CTFB or TPVB using 15 mL aliquots of 0.5% ropivacaine at the T4-5 and T6-7 intercostal levels immediately after the induction of general anesthesia. MEASUREMENTS The primary outcome was the area under the curve (AUC) of numeric rating scale (NRS, 0 to 10) during 24 h postoperatively (noninferiority limit was 24; NRS 1 per hour). The secondary outcomes included postoperative opioid consumption, rescue analgesic use, postoperative nausea and vomiting, pulmonary function, dermatomal spread of the blockade, and quality of recovery. MAIN RESULTS Forty-seven patients were included for final analysis. The difference between the mean 24-h AUCs of NRS in the CTFB (34.25 ± 16.30, n = 24) and TPVB (39.52 ± 17.13, n = 23) groups was -5.27 (95% confidence interval [CI], -15.09 to 4.55), with the upper limit of 95% CI being far below the predefined noninferiority margin of 24. There was no significant difference in the dermatomal spread of the blockades between the groups, as both reached the upper and lower most levels of T3 and T7 (median). Additionally, there were no significant differences in other secondary outcomes between the two groups. CONCLUSIONS The analgesic effect of CTFB was noninferior to that of TPVB during 24 h postoperatively in VATS pulmonary resection. Moreover, CTFB may offer potential safety benefits by keeping the tip of the needle far from the pleura and vascular structure.
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Affiliation(s)
- Chahyun Oh
- Department of Anesthesiology and Pain Medicine, Chungnam National University Hospital, Daejeon, Republic of Korea; Department of Anesthesiology and Pain Medicine, College of Medicine, Chungnam National University, Daejeon, Republic of Korea
| | - Yooyoung Chong
- Department of Thoracic & Cardiovascular Surgery, Chungnam National University Hospital, Daejeon, Republic of Korea
| | - Min-Woong Kang
- Department of Thoracic & Cardiovascular Surgery, Chungnam National University Hospital, Daejeon, Republic of Korea
| | - Jaemun Bae
- Department of Thoracic & Cardiovascular Surgery, Chungnam National University Hospital, Daejeon, Republic of Korea
| | - Soomin Lee
- Department of Anesthesiology and Pain Medicine, Chungnam National University Hospital, Daejeon, Republic of Korea; Department of Anesthesiology and Pain Medicine, College of Medicine, Chungnam National University, Daejeon, Republic of Korea
| | - Yumin Jo
- Department of Anesthesiology and Pain Medicine, Chungnam National University Hospital, Daejeon, Republic of Korea; Department of Anesthesiology and Pain Medicine, College of Medicine, Chungnam National University, Daejeon, Republic of Korea
| | - Jiyong Lee
- Department of Anesthesiology and Pain Medicine, Chungnam National University Hospital, Daejeon, Republic of Korea; Department of Anesthesiology and Pain Medicine, College of Medicine, Chungnam National University, Daejeon, Republic of Korea
| | - Sujin Baek
- Department of Anesthesiology and Pain Medicine, Chungnam National University Hospital, Daejeon, Republic of Korea; Department of Anesthesiology and Pain Medicine, College of Medicine, Chungnam National University, Daejeon, Republic of Korea
| | - Jinsik Jung
- Department of Anesthesiology and Pain Medicine, College of Medicine, Chungnam National University, Daejeon, Republic of Korea
| | - Yoon-Hee Kim
- Department of Anesthesiology and Pain Medicine, Chungnam National University Hospital, Daejeon, Republic of Korea; Department of Anesthesiology and Pain Medicine, College of Medicine, Chungnam National University, Daejeon, Republic of Korea
| | - Boohwi Hong
- Department of Anesthesiology and Pain Medicine, Chungnam National University Hospital, Daejeon, Republic of Korea; Department of Anesthesiology and Pain Medicine, College of Medicine, Chungnam National University, Daejeon, Republic of Korea.
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Oh J, Piao Z, Cho HJ, Chong Y, Kim SS, Kim JH, Kang MW. CT-based three-dimensional invasiveness analysis of adenocarcinoma presenting as pure ground-glass nodules. Transl Cancer Res 2023; 12:765-773. [PMID: 37180668 PMCID: PMC10174765 DOI: 10.21037/tcr-22-2327] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2022] [Accepted: 03/14/2023] [Indexed: 05/16/2023]
Abstract
Background We invest computed tomography (CT) image differences between non-invasive adenocarcinomas (NIAs) and invasive adenocarcinomas (IAs) presenting as pure ground glass nodules (GGNs). Methods From 2013 to 2019, 48 pure GGNs were surgically resected in 45 patients. Of these, 40 were pathologically diagnosed as non-small cell lung cancers (NSCLCs). We assessed them using the Synapse Vincent (Fujifilm Co., Ltd., Tokyo, Japan) three-dimensional (3D) analysis system; we drew histograms of the CT densities. We calculated the maximum, minimum, means, and standard deviations of the densities. The proportions of GGNs of high CT density were compared between the two groups. The diagnostic performance was investigated via receiver operating curve (ROC) analysis. Results Of the 40 pure GGNs, 20 were NIAs (4 adenocarcinomas in situ and 16 minimally IAs) and 20 IAs. Significant correlations were evident between histological invasiveness and the maximum and mean CT densities and the standard deviation. Neither the nodule volume nor the minimum CT density significantly predicted invasiveness. A CT volume density proportion >-300 Hounsfield units optimally predicted the invasiveness of pure GGNs; the cutoff was 5.41% with a sensitivity of 85% and a specificity of 95%. Conclusions CT density reflected the invasiveness of pure GGNs. A CT volume proportion density >-300 Hounsfield units may significantly predict histological invasiveness.
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Affiliation(s)
- Jieun Oh
- Center for Advanced Medical Computing and Analysis, Department of Radiology, Massachusetts General Hospital and Harvard Medical School, Boston, MA, USA
| | - Zhe Piao
- Department of Thoracic Surgery, The Affiliated Zhongshan Hospital of Dalian University, Dalian, China
| | - Hyun Jin Cho
- Department of Thoracic and Cardiovascular Surgery, Chungnam National University Sejong Hospital, Sejong, South Korea
| | - Yooyoung Chong
- Department of Thoracic and Cardiovascular Surgery, Chungnam National University Hospital, Chungnam National University School of Medicine, Daejeon, South Korea
| | - Song Soo Kim
- Department of Radiology, Chungnam National University Hospital, Chungnam National University School of Medicine, Daejeon, South Korea
| | - Jin Hwan Kim
- Department of Radiology, Chungnam National University Hospital, Chungnam National University School of Medicine, Daejeon, South Korea
| | - Min-Woong Kang
- Department of Thoracic and Cardiovascular Surgery, Chungnam National University Hospital, Chungnam National University School of Medicine, Daejeon, South Korea
- Gordon Center for Medical Imaging, Department of Radiology, Massachusetts General Hospital and Harvard Medical School, Boston, MA, USA
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Chong Y, Jung YC, Hwang E, Cho HJ, Kang MW, Na MH. Circulating Tumor Cell Detection in Lung Cancer Animal Model. J Chest Surg 2021; 54:460-465. [PMID: 34667135 PMCID: PMC8646057 DOI: 10.5090/jcs.21.044] [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] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2021] [Revised: 07/20/2021] [Accepted: 08/05/2021] [Indexed: 11/16/2022] Open
Abstract
BACKGROUND Metastasis and recurrence of primary cancer are the main causes of cancer mortality. Disseminated tumor cells refer to cancer cells that cause metastasis from primary cancer to other organs. Several recent studies have suggested that circulating tumor cells (CTCs) are associated with the clinical stage, cancer recurrence, cancer metastasis, and prognosis. There are several methods of isolating CTCs from whole blood; in particular, using a membrane filtration system is advantageous due to its cost-effectiveness and availability in clinical settings. In this study, an animal model of lung cancer was established in nude mice using the human large cell lung cancer cell line H460. METHODS Six-week-old nude mice were used. The H460 lung cancer cell line was injected subcutaneously into the nude mice. Blood samples were obtained from the orbital area before cell line injection, 2 weeks after injection, and 2 weeks after tumor excision. Blood samples were filtered using a polycarbonate 12-well Transwell membrane (Corning Inc., Corning, NY, USA). An indirect immunofluorescence assay was performed with the epithelial cell adhesion molecule antibody. The number of stained cells was counted using fluorescence microscopy. RESULTS The average size of the tumor masses was 35.83 mm. The stained cells were counted before inoculation, 2 weeks after inoculation, and 2 weeks after tumor excision. Cancer cells generally increased after inoculation and decreased after tumor resection. CONCLUSION The CTC detection method using the commercial polycarbonate 12-well Transwell (Corning Inc.) membrane is advantageous in terms of cost-effectiveness and convenience.
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Affiliation(s)
- Yooyoung Chong
- Department of Thoracic and Cardiovascular Surgery, Chungnam National University Hospital, Chungnam National University School of Medicine, Daejeon, Korea
| | - Yong Chae Jung
- Department of Thoracic and Cardiovascular Surgery, Chungnam National University Hospital, Chungnam National University School of Medicine, Daejeon, Korea
| | - Euidoo Hwang
- Department of Thoracic and Cardiovascular Surgery, Chungnam National University Hospital, Chungnam National University School of Medicine, Daejeon, Korea
| | - Hyun Jin Cho
- Department of Thoracic and Cardiovascular Surgery, Chungnam National University Hospital, Chungnam National University School of Medicine, Daejeon, Korea
| | - Min-Woong Kang
- Department of Thoracic and Cardiovascular Surgery, Chungnam National University Hospital, Chungnam National University School of Medicine, Daejeon, Korea
| | - Myung Hoon Na
- Department of Thoracic and Cardiovascular Surgery, Chungnam National University Hospital, Chungnam National University School of Medicine, Daejeon, Korea
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Chong Y, Gang MH, Choi AY, Chang MY, Ko G, Yang H, Yu JH. Surgical management of total sternal cleft in a pentalogy of Cantrell neonate. Ann Thorac Surg 2021; 113:e335-e338. [PMID: 34332997 DOI: 10.1016/j.athoracsur.2021.07.010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/26/2021] [Revised: 07/04/2021] [Accepted: 07/08/2021] [Indexed: 11/01/2022]
Abstract
Sternal cleft is a rare malformation with significant morbidity and mortality. It has been associated with other midline fusion defects, most significantly Cantrell's pentalogy, involving the sternum, pericardium, heart, diaphragm, and abdominal wall. This study reported a successfully managed case of a newborn with a total sternal cleft and Cantrell's pentalogy. A review of literature and pertinent management principles was also conducted.
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Affiliation(s)
- Yooyoung Chong
- Department of Thoracic and Cardiovascular Surgery, Chungnam National University Hospital
| | - Mi Hyeon Gang
- Department of Pediatrics, Chungnam National University Hospital
| | - Ah Young Choi
- Department of Pediatrics, Chungnam National University Hospital
| | - Mea-Young Chang
- Department of Pediatrics, Chungnam National University Hospital
| | - Geonil Ko
- Department of Plastic Surgery, Chungnam National University Hospital
| | - Hogik Yang
- Department of Plastic Surgery, Chungnam National University Hospital
| | - Jae Hyeon Yu
- Department of Thoracic and Cardiovascular Surgery, Chungnam National University Hospital.
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Abughararah TZ, Jeong YH, Alabbood F, Chong Y, Yun JK, Lee GD, Choi S, Kim HR, Kim YH, Kim DK, Park SI. Lobe-specific lymph node dissection in stage IA non-small-cell lung cancer: a retrospective cohort study. Eur J Cardiothorac Surg 2021; 59:783-790. [PMID: 33150427 DOI: 10.1093/ejcts/ezaa369] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/21/2020] [Revised: 08/29/2020] [Accepted: 09/06/2020] [Indexed: 12/26/2022] Open
Abstract
OBJECTIVES To investigate lymph node (LN) metastasis according to tumour location and assess the impact of lobe-specific LN dissection on survival in stage IA non-small-cell lung cancer (NSCLC). METHODS We retrospectively analysed the data of patients with clinical stage IA NSCLC treated with lobectomy and systematic LN dissection at Asan Medical Center (Seoul, Korea) between June 2005 and April 2017. Patients who received neoadjuvant therapy had multiple primary tumours or missed the follow-up during the first postoperative year were excluded. The patients were divided into five groups according to involved lung lobes: right upper lobe (RUL), right middle lobe (RML), right lower lobe (RLL), left upper lobe (LUL) and left lower lobe (LLL), which were further divided into subgroups according to LN station metastasis. Overall survival (OS) and the incidence of metastasis were calculated for each subgroup. Efficacy indices (EIs) were calculated to determine the correlation between each lung lobe and LN station, and the impact of the dissection of these stations on survival. RESULTS A total of 1202 patients were analysed. The 5-year OS in the RUL, RML, RLL, LUL and LLL groups was 74%, 88%, 78%, 80% and 75%, respectively. The incidence of single LN station metastasis was 11%, 10%, 10%, 16% and 14%, respectively. The lobe-specific LNs for RUL, RML, RLL, LUL and LLL were stations 2/3/4, 4/7, 2/4/7, 4/5/6 and 6/7/9, respectively. Moreover, the LN stations with high EIs for RUL, RML, RLL, LUL and LLL were 4, 7, 7, 5 and 7, respectively. In the RUL group, the incidence of metastasis to stations 2, 3 and 4 was 2.3%, 0.5% and 7.6%, and the EI was 0.8, 0.3 and 4.3, respectively. In RML, the incidence of metastasis to stations 4 and 7 was 4% and 6%, and the EI was 1.3 and 2.4, respectively. In RLL, the incidence of metastasis to stations 2, 4 and 7 was 4.4%, 5.6% and 8.3%, and the EI was 1.3, 1.4 and 3.3, respectively. In LUL, the incidence of metastasis to stations 4, 5 and 6 was 1.4%, 11.8% and 2.5%, and the EI was 0.4, 7.1 and 0.5, respectively. In LLL, the incidence of metastasis to stations 6, 7 and 9 was 1.1%, 5.7% and 1.7%, and the EI was 0.6, 2.3 and 0.5, respectively. Furthermore, the OS of patients with lobe-specific LN metastasis was statistically significantly different from that of the non-lobe-specific LN metastasis group with P-values of <0.001 for RUL, 0.002 for RML, 0.002 for RLL, 0.001 for LUL and 0.003 for LLL. CONCLUSIONS Our findings support the use of lobe-specific LN dissection in stage IA NSCLC. When LN stations with high EI were negative, LN metastasis in other stations was unlikely. The incidence of LN metastasis beyond lobe-specific LN stations was ∼1% in all subgroups. Dissection of non-lobe-specific LNs may not improve the OS; however, prospective randomized controlled trials are needed to modify the standard approach.
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Affiliation(s)
- Tariq Ziad Abughararah
- Department of Thoracic and Cardiovascular Surgery, Asan Medical Center, University of Ulsan, College of Medicine, Seoul, South Korea.,Department of Thoracic Surgery, Prince Mohammed Bin Abdulaziz Hospital, MNGHA, King Abdullah International Medical Research Center, Riyadh, Saudi Arabia
| | - Yong Ho Jeong
- Department of Thoracic and Cardiovascular Surgery, Asan Medical Center, University of Ulsan, College of Medicine, Seoul, South Korea
| | - Fahd Alabbood
- Department of Thoracic and Cardiovascular Surgery, Asan Medical Center, University of Ulsan, College of Medicine, Seoul, South Korea
| | - Yooyoung Chong
- Department of Thoracic and Cardiovascular Surgery, Asan Medical Center, University of Ulsan, College of Medicine, Seoul, South Korea
| | - Jae Kwang Yun
- Department of Thoracic and Cardiovascular Surgery, Asan Medical Center, University of Ulsan, College of Medicine, Seoul, South Korea
| | - Geun Dong Lee
- Department of Thoracic and Cardiovascular Surgery, Asan Medical Center, University of Ulsan, College of Medicine, Seoul, South Korea
| | - Sehoon Choi
- Department of Thoracic and Cardiovascular Surgery, Asan Medical Center, University of Ulsan, College of Medicine, Seoul, South Korea
| | - Hyeong Ryul Kim
- Department of Thoracic and Cardiovascular Surgery, Asan Medical Center, University of Ulsan, College of Medicine, Seoul, South Korea
| | - Yong-Hee Kim
- Department of Thoracic and Cardiovascular Surgery, Asan Medical Center, University of Ulsan, College of Medicine, Seoul, South Korea
| | - Dong Kwan Kim
- Department of Thoracic and Cardiovascular Surgery, Asan Medical Center, University of Ulsan, College of Medicine, Seoul, South Korea
| | - Seung-Il Park
- Department of Thoracic and Cardiovascular Surgery, Asan Medical Center, University of Ulsan, College of Medicine, Seoul, South Korea
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Han SJ, Chong Y, Shim MS, Han W, Cho HJ, Kang SK, Yu JH. Surgical treatment for mediastinitis after endobronchial ultrasound-guided transbronchial needle aspiration: 2 case reports. Int J Surg Case Rep 2020; 77:624-627. [PMID: 33395860 PMCID: PMC7708850 DOI: 10.1016/j.ijscr.2020.11.068] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2020] [Revised: 11/10/2020] [Accepted: 11/10/2020] [Indexed: 12/02/2022] Open
Abstract
Mediastinitis by endobronchial ultrasound-guided transbronchial needle aspiration. EBUS-related mediastinitis is treated effectively by surgical drainage. Combination of surgery and medical treatment can be very effective in the treatment of inflammation caused by EBUS.
We report two cases of severe mediastinitis accompanied by abscess due to endobronchial ultrasound-guided transbronchial needle aspiration (EBUS-TBNA), that were successfully treated by effective surgical drainage. A 68-year-old woman was referred to our hospital due to chest discomfort and high fever after EBUS-TBNA, and a 54-year-old man was referred due to general weakness, chills, and high fever after the same procedure. Both were diagnosed with EBUS-related mediastinitis and discharged after surgical treatment. Similar to previous reports, the importance of surgical procedures for mediastinitis caused by EBUS-TBNA was suggested. Further research and establishment of guidelines on this matter is necessary.
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Affiliation(s)
- Sung Joon Han
- Department of Thoracic and Cardiovascular Surgery, Chungnam National University Hospital, Chungnam National University School of Medicine, Munhwa-ro 282, Jung-gu, Daejeon, 35015, South Korea.
| | - Yooyoung Chong
- Department of Thoracic and Cardiovascular Surgery, Chungnam National University Hospital, Chungnam National University School of Medicine, Munhwa-ro 282, Jung-gu, Daejeon, 35015, South Korea.
| | - Man-Shik Shim
- Department of Thoracic and Cardiovascular Surgery, Chungnam National University Hospital, Chungnam National University School of Medicine, Munhwa-ro 282, Jung-gu, Daejeon, 35015, South Korea.
| | - Woosik Han
- Department of Thoracic and Cardiovascular Surgery, Chungnam National University Hospital, Chungnam National University School of Medicine, Munhwa-ro 282, Jung-gu, Daejeon, 35015, South Korea.
| | - Hyun Jin Cho
- Department of Thoracic and Cardiovascular Surgery, Chungnam National University Hospital, Chungnam National University School of Medicine, Munhwa-ro 282, Jung-gu, Daejeon, 35015, South Korea.
| | - Shin Kwang Kang
- Department of Thoracic and Cardiovascular Surgery, Chungnam National University Hospital, Chungnam National University School of Medicine, Munhwa-ro 282, Jung-gu, Daejeon, 35015, South Korea.
| | - Jae Hyeon Yu
- Department of Thoracic and Cardiovascular Surgery, Chungnam National University Hospital, Chungnam National University School of Medicine, Munhwa-ro 282, Jung-gu, Daejeon, 35015, South Korea.
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Lee K, Kim H, Ryu J, Kim Y, Park S, Kim D, Kim Y, Choi S, Lee G, Jeong Y, Yun J, Chong Y. P1.14-45 Surgical Outcome of Non-Small Cell Lung Cancer with Clinical Single Zone N2 in Aortopulmonary Zone (LN#5 and LN#6). J Thorac Oncol 2019. [DOI: 10.1016/j.jtho.2019.08.1196] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Lee K, Kim H, Park S, Kim D, Kim Y, Choi S, Lee G, Jeong Y, Yun J, Chong Y. MA01.05 Progress of Accompanying GGN Beyond Pulmonary Resection for Non-Small Cell Lung Cancer. J Thorac Oncol 2019. [DOI: 10.1016/j.jtho.2019.08.496] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Chong Y, Yun J, Jeong Y, Lee G, Choi S, Kim H, Kim Y, Park S, Kim D. P2.17-09 Preoperative Risk Factors of Potential Failure for Lobe-Specific Nodal Dissection in Clinical Early Stage (I-IIA) Non-Small Cell Lung Cancer. J Thorac Oncol 2019. [DOI: 10.1016/j.jtho.2019.08.1920] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Yun J, Lee G, Chong Y, Jeong Y, Choi S, Kim H, Kim Y, Kim D, Park S. MA02.10 Different Prognostic Impact of Lymphovascular Invasion Between Lobectomy and Sublobar Resection in Stage IA Non-Small Cell Lung Cancer: A Propensity Score–Matched Analysis. J Thorac Oncol 2019. [DOI: 10.1016/j.jtho.2019.08.509] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Xue H, Chong Y, Jiang ZD, Liu ZL, Ding L, Yang SL, Wang L, Xiang WP. [Etiological analysis on patients with vertigo or dizziness]. Zhonghua Yi Xue Za Zhi 2018; 98:1227-1230. [PMID: 29747309 DOI: 10.3760/cma.j.issn.0376-2491.2018.16.008] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To explore the spectrum of causes for patients with vertigo or dizziness in the Department of Neurology, and provide a reference for diagnosis and treatment of patients with vertigo or dizziness. Methods: Clinical data of patients in the Department of Neurology, Baotou Central Hospital between January 2016 and September 2017 was retrospectively analyzed. The target group under study was diagnosed based on the uniform diagnostic criteria. Results: A total of 9 200 patients with a chief complaint of vertigo or dizziness were included. The ratio of male to female was 1∶1.8, with an age range of 19 to 85 years. The different etiology was as follows: benign paroxysmal positional vertigo (BPPV) (3 148 cases, 34.22%), persistent postural-perceptual dizziness (PPPD) (2 006 cases, 21.80%), vertigo caused by cerebrovascular diseases (1 463 cases, 15.90%), vestibular neuritis (741 cases, 8.05%), vestibular migraine (536 cases, 5.83%), vestibular paroxysmia (336 cases, 3.65%), Ménière disease (187 cases, 2.03%), drug-induced vertigo (96 cases, 1.04%), neurological degenerative diseases (74 cases, 0.80%), sudden sensorineural hearing loss (51 cases, 0.55%), multiple sclerosis and neuromyelitis optica (21 cases, 0.23%), other reasons (22 cases, 0.24%), unknown reasons (519 cases, 5.64%). Conclusions: Dizziness is resulted from various causes, and BPPV is the most common reason. Vertigo caused by cerebrovascular diseases appears to gradually increase along with age. PPPD is very common in clinical practice, so clinicians needs to be highly aware of BPPV and PPPD. Although those dizziness diseases have a low incidence, they should not be ignored. There are still certain proportion of vertigo patients whose diagnosis are undetermined.
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Affiliation(s)
- H Xue
- Department of Neurology, Baotou Central Hospital, Baotou 014040, China
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Mak CM, Lam C, Siu W, Law C, Chan W, Lee HC, Chong Y, Chen SR, Ching C, Wong C, Lee M, Chow K, Lee K, Chan W, Chan K, Lee SY, Chan YW. OPathPaed service model for expanded newborn screening in Hong Kong SAR, China. Br J Biomed Sci 2018; 70:84-8. [DOI: 10.1080/09674845.2013.11978266] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
- C. M. Mak
- Chemical Pathology Laboratory, Department of Pathology, Princess Margaret Hospital
| | - C. Lam
- Department of Pathology, Li Ka Shing Faculty of Medicine, The University of Hong Kong
| | - W. Siu
- Chemical Pathology Laboratory, Department of Pathology, Princess Margaret Hospital
| | - C. Law
- Chemical Pathology Laboratory, Department of Pathology, Princess Margaret Hospital
| | - W. Chan
- Chemical Pathology Laboratory, Department of Pathology, Princess Margaret Hospital
| | - H. C. Lee
- Chemical Pathology Laboratory, Department of Pathology, Princess Margaret Hospital
| | - Y. Chong
- Chemical Pathology Laboratory, Department of Pathology, Princess Margaret Hospital
| | - S. R. Chen
- Chemical Pathology Laboratory, Department of Pathology, Princess Margaret Hospital
| | - C. Ching
- Chemical Pathology Laboratory, Department of Pathology, Princess Margaret Hospital
| | - C. Wong
- Department of Clinical Pathology, Tuen Mun Hospital
| | - M. Lee
- Department of Clinical Pathology, Tuen Mun Hospital
| | - K. Chow
- Department of Obstetrics and Gynaecology
| | - K. Lee
- Department of Obstetrics and Gynaecology
| | - W. Chan
- Department of Paediatrics and Adolescent Medicine, Princess Margaret Hospital, Hong Kong SAR, China
| | - K. Chan
- Department of Paediatrics and Adolescent Medicine, Princess Margaret Hospital, Hong Kong SAR, China
| | - S. Y. Lee
- Department of Clinical Pathology, Tuen Mun Hospital
| | - Y. W. Chan
- Chemical Pathology Laboratory, Department of Pathology, Princess Margaret Hospital
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Song Y, Yoon YC, Chong Y, Seo SW, Choi YL, Sohn I, Kim MJ. Diagnostic performance of conventional MRI parameters and apparent diffusion coefficient values in differentiating between benign and malignant soft-tissue tumours. Clin Radiol 2017; 72:691.e1-691.e10. [PMID: 28274509 DOI: 10.1016/j.crad.2017.02.003] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2016] [Revised: 01/23/2017] [Accepted: 02/03/2017] [Indexed: 12/15/2022]
Abstract
AIM To compare the abilities of conventional magnetic resonance imaging (MRI) and apparent diffusion coefficient (ADC) in differentiating between benign and malignant soft-tissue tumours (STT). MATERIAL AND METHODS A total of 123 patients with STT who underwent 3 T MRI, including diffusion-weighted imaging (DWI), were retrospectively analysed using variate conventional MRI parameters, ADCmean and ADCmin. RESULTS For the all-STT group, the correlation between the malignant STT conventional MRI parameters, except deep compartment involvement, compared to those of benign STT were statistically significant with univariate analysis. Maximum diameter of the tumour (p=0.001; odds ratio [OR], 8.97) and ADCmean (p=0.020; OR, 4.30) were independent factors with multivariate analysis. For the non-myxoid non-haemosiderin STT group, signal heterogeneity on axial T1-weighted imaging (T1WI; p=0.017), ADCmean, and ADCmin (p=0.001, p=0.001), showed significant differences with univariate analysis between malignancy and benignity. Signal heterogeneity in axial T1WI (p=0.025; OR, 12.64) and ADCmean (p=0.004; OR, 33.15) were independent factors with multivariate analysis. CONCLUSION ADC values as well as conventional MRI parameters were useful in differentiating between benign and malignant STT. The ADCmean was the most powerful diagnostic parameter in non-myxoid non-haemosiderin STT.
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Affiliation(s)
- Y Song
- Department of Radiology, Hanyang University Hospital, Seoul, Republic of Korea; Department of Radiology, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Republic of Korea
| | - Y C Yoon
- Department of Radiology, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Republic of Korea; Department of Health Sciences and Technology, SAIHST, Sungkyunkwan University, Seoul, Republic of Korea.
| | - Y Chong
- Department of Radiology, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Republic of Korea
| | - S W Seo
- Department of Orthopedic Surgery, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Republic of Korea
| | - Y-L Choi
- Department of Health Sciences and Technology, SAIHST, Sungkyunkwan University, Seoul, Republic of Korea; Department of Pathology and Translational Genomics, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Republic of Korea
| | - I Sohn
- Department of Biostatistics and Clinical Epidemiology Center, Samsung Medical Center, Seoul, Republic of Korea
| | - M-J Kim
- Biostatistics Team, Samsung Biomedical Research Institute, Seoul, Republic of Korea
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Chong Y, Han SJ, Rhee YJ, Kang SK, Yu JH, Na MH. Classic Peripheral Signs of Subacute Bacterial Endocarditis. Korean J Thorac Cardiovasc Surg 2016; 49:408-412. [PMID: 27734006 PMCID: PMC5059132 DOI: 10.5090/kjtcs.2016.49.5.408] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/01/2015] [Revised: 10/05/2015] [Accepted: 10/05/2015] [Indexed: 11/16/2022]
Abstract
A 50-year-old female patient with visual disturbances was referred for further evaluation of a heart murmur. Fundoscopy revealed a Roth spot in both eyes. A physical examination showed peripheral signs of infective endocarditis, including Osler nodes, Janeway lesions, and splinter hemorrhages. Our preoperative diagnosis was subacute bacterial endocarditis with severe aortic regurgitation. The patient underwent aortic valve replacement and was treated with intravenous antibiotics for 6 weeks postoperatively. The patient made a remarkable recovery and was discharged without complications. We report this case of subacute endocarditis with all 4 classic peripheral signs in a patient who presented with visual disturbance.
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Affiliation(s)
- Yooyoung Chong
- Department of Thoracic and Cardiovascular Surgery, Chungnam National University School of Medicine
| | - Sung Joon Han
- Department of Thoracic and Cardiovascular Surgery, Chungnam National University School of Medicine
| | - Youn Ju Rhee
- Department of Thoracic and Cardiovascular Surgery, Chungnam National University School of Medicine
| | - Shin Kwang Kang
- Department of Thoracic and Cardiovascular Surgery, Chungnam National University School of Medicine
| | - Jae Hyeon Yu
- Department of Thoracic and Cardiovascular Surgery, Chungnam National University School of Medicine
| | - Myung Hoon Na
- Department of Thoracic and Cardiovascular Surgery, Chungnam National University School of Medicine
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Chong Y, Rhee YJ, Han SJ, Cho HJ, Kang SK, Kang MW. Life-Threatening Congenital Cystic Adenomatoid Malformation in the Premature Neonate. Korean J Thorac Cardiovasc Surg 2016; 49:210-3. [PMID: 27298802 PMCID: PMC4900867 DOI: 10.5090/kjtcs.2016.49.3.210] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [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: 09/01/2015] [Revised: 11/02/2015] [Accepted: 11/03/2015] [Indexed: 11/21/2022]
Abstract
Congenital cystic adenomatoid malformation is a rare, but well-known disease. It can be managed conservatively in patients without symptoms or require surgical removal when symptomatic. The surgical option of choice is en bloc resection of the affected lesion. We report an experience of life-threatening congenital cystic adenoid malformation in a low-birth-weight (1,590 g) premature neonate who was successfully treated with a lobectomy of the lung.
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Affiliation(s)
- Yooyoung Chong
- Department of Thoracic and Cardiovascular Surgery, Chungnam National University School of Medicine
| | - Youn Ju Rhee
- Department of Thoracic and Cardiovascular Surgery, Chungnam National University School of Medicine
| | - Sung Joon Han
- Department of Thoracic and Cardiovascular Surgery, Chungnam National University School of Medicine
| | - Hyun Jin Cho
- Department of Thoracic and Cardiovascular Surgery, Chungnam National University School of Medicine
| | - Shin Kwang Kang
- Department of Thoracic and Cardiovascular Surgery, Chungnam National University School of Medicine
| | - Min-Woong Kang
- Department of Thoracic and Cardiovascular Surgery, Chungnam National University School of Medicine
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Pinto S, Chong Y, García R, Almeida A, Perea MV, Ladera V. Gestural praxis in young adults with mild to moderate intellectual disabilities. J Intellect Disabil Res 2016; 60:523-536. [PMID: 26936684 DOI: 10.1111/jir.12266] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/08/2015] [Revised: 01/10/2016] [Accepted: 01/28/2016] [Indexed: 06/05/2023]
Abstract
BACKGROUND Praxis functioning in the population with intellectual disabilities (ID) has been poorly studied. The goal of this research was to look for a starting point to study the praxic functioning in young adults with mild to moderate ID. METHOD Thirty young adults with ID and 30 young adults without ID, between the ages of 18 and 35 years, participated in this study. All participants completed tests that assessed gestural praxis. RESULTS It was possible to observe similar praxis behaviour in the group with ID in almost all domains studied, albeit showing statistical values lower than those of the group without ID. DISCUSSIONS Despite the high number of errors committed, the sample of participants with ID was able to reach the goal of praxic tasks performed; such errors may be associated with a deficit in the development of various brain functions and not only with praxis functioning, mainly related to a lower yield in terms of planning, monitoring and correcting intentional movement.
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Affiliation(s)
- S Pinto
- Department of Social and Behavioural Sciences, ISMAI - University Institute of Maia, Portugal
| | - Y Chong
- Department of Social and Behavioural Sciences, ISMAI - University Institute of Maia, Portugal
| | - R García
- School of Psychology, University of Salamanca, Spain
| | - A Almeida
- Department of Social and Behavioural Sciences, ISMAI - University Institute of Maia, Portugal
| | - M V Perea
- School of Psychology, University of Salamanca, Spain
| | - V Ladera
- School of Psychology, University of Salamanca, Spain
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Chong Y, Cho HJ, Kang SK, Na MH, Yu JH, Lim SP, Kang MW. Outcomes of the Tower Crane Technique with a 15-mm Trocar in Primary Spontaneous Pneumothorax. Korean J Thorac Cardiovasc Surg 2016; 49:80-4. [PMID: 27066430 PMCID: PMC4825907 DOI: 10.5090/kjtcs.2016.49.2.80] [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] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/22/2015] [Revised: 08/04/2015] [Accepted: 08/05/2015] [Indexed: 11/16/2022]
Abstract
Background Video-assisted thoracoscopic surgery (VATS) pulmonary wedge resection has emerged as the standard treatment for primary spontaneous pneumothorax. Recently, single-port VATS has been introduced and is now widely performed. This study aimed to evaluate the outcomes of the Tower crane technique as novel technique using a 15-mm trocar and anchoring suture in primary spontaneous pneumothorax. Methods Patients who underwent single-port VATS wedge resection in Chungnam National University Hospital from April 2012 to March 2014 were enrolled. The medical records of the enrolled patients were reviewed retrospectively. Results A total of 1,251 patients were diagnosed with pneumothorax during this period, 270 of whom underwent VATS wedge resection. Fifty-two of those operations were single-port VATS wedge resections for primary spontaneous pneumothorax performed by a single surgeon. The median age of the patients was 19.3±11.5 years old, and 43 of the patients were male. The median duration of chest tube drainage following the operation was 2.3±1.3 days, and mean postoperative hospital stay was 3.2±1.3 days. Prolonged air leakage for more than three days following the operation was observed in one patient. The mean duration of follow-up was 18.7±6.1 months, with a recurrence rate of 3.8%. Conclusion The tower crane technique with a 15-mm trocar may be a promising treatment modality for patients presenting with primary spontaneous pneumothorax.
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Affiliation(s)
- Yooyoung Chong
- Department of Thoracic and Cardiovascular Surgery, Chungnam National University School of Medicine
| | - Hyun Jin Cho
- Department of Thoracic and Cardiovascular Surgery, Chungnam National University School of Medicine
| | - Shin Kwang Kang
- Department of Thoracic and Cardiovascular Surgery, Chungnam National University School of Medicine
| | - Myung Hoon Na
- Department of Thoracic and Cardiovascular Surgery, Chungnam National University School of Medicine
| | - Jae Hyeon Yu
- Department of Thoracic and Cardiovascular Surgery, Chungnam National University School of Medicine
| | - Seung Pyung Lim
- Department of Thoracic and Cardiovascular Surgery, Chungnam National University School of Medicine
| | - Min-Woong Kang
- Department of Thoracic and Cardiovascular Surgery, Chungnam National University School of Medicine
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Tham E, Broekman B, Goh D, Teoh O, Chong Y, Gluckman P, Godfrey K, Meaney M, Rifkin-Graboi A, Gooley J. Nocturnal wakefulness at 3 months predicts toddler cognitive, language and motor abilities. Sleep Med 2015. [DOI: 10.1016/j.sleep.2015.02.117] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Nakar C, Manco-Johnson MJ, Lail A, Donfield S, Maahs J, Chong Y, Blades T, Shapiro A. Prompt immune tolerance induction at inhibitor diagnosis regardless of titre may increase overall success in haemophilia A complicated by inhibitors: experience of two US centres. Haemophilia 2015; 21:365-373. [DOI: 10.1111/hae.12608] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/10/2014] [Indexed: 01/19/2023]
Affiliation(s)
- C. Nakar
- The Indiana Hemophilia and Thrombosis Center (IHTC); Indianapolis IN USA
| | - M. J. Manco-Johnson
- The University of Colorado Hemophilia & Thrombosis Center (UCHTC); Aurora CO USA
| | - A. Lail
- Rho, Inc.; Chapel Hill NC USA
| | | | - J. Maahs
- The Indiana Hemophilia and Thrombosis Center (IHTC); Indianapolis IN USA
| | - Y. Chong
- The Indiana Hemophilia and Thrombosis Center (IHTC); Indianapolis IN USA
| | - T. Blades
- The University of Colorado Hemophilia & Thrombosis Center (UCHTC); Aurora CO USA
| | - A. Shapiro
- The Indiana Hemophilia and Thrombosis Center (IHTC); Indianapolis IN USA
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Chong Y, Shin J, Ko E, Han BK. Ultrasonographic elastography of thyroid nodules: Is adding strain ratio to colour mapping better? Clin Radiol 2013; 68:1241-6. [DOI: 10.1016/j.crad.2013.06.023] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2013] [Revised: 06/17/2013] [Accepted: 06/21/2013] [Indexed: 10/26/2022]
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Yim JS, Lee Y, Kim M, Seo Y, Kim W, Yong D, Jeong S, Lee K, Chong Y. P71 Antimicrobial resistance patterns for clinical isolates of Bacteroides fragilis group organisms isolated in 2009–2012 at a Korean hospital. Int J Antimicrob Agents 2013. [DOI: 10.1016/s0924-8579(13)70316-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Lee H, Bai I, Jeong S, Lee K, Chong Y. P70 Antimicrobial resistance of major nosocomial pathogens isolated from 22 Korean hospitals in 2011. Int J Antimicrob Agents 2013. [DOI: 10.1016/s0924-8579(13)70315-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Abstract
The ability of penetration of the blood-brain barrier is one of the significant properties of a drug or drug-like compound for the central nervous system (CNS), which is commonly expressed by log BB (log BB = log (C (brain)/C (blood))). In this work, a dataset of 320 compounds with log BB values was split into a training set including 198 compounds and a test set including 122 compounds according to their structure properties by a Kohonen's self-organizing map (SOM). Each molecule was represented by global and shape descriptors, 2D autocorrelation descriptors and RDF descriptors calculated by ADRIANA.Code. Several quantitative models for prediction of log BB were built by a multilinear regression (MLR), a support vector machine (SVM) and an artificial neural network (ANN) analysis. The models show good prediction performance on the test set compounds.
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Affiliation(s)
- A Yan
- State Key Laboratory of Chemical Resource Engineering, Department of Pharmaceutical Engineering , Beijing University of Chemical Technology, People's Republic of China.
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Chong Y, Yakushiji H, Ito Y, Kamimura T. Clinical and molecular epidemiology of extended-spectrum β-lactamase-producing Escherichia coli and Klebsiella pneumoniae in a long-term study from Japan. Eur J Clin Microbiol Infect Dis 2010; 30:83-7. [PMID: 20859753 DOI: 10.1007/s10096-010-1057-1] [Citation(s) in RCA: 33] [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: 01/26/2010] [Accepted: 08/28/2010] [Indexed: 10/19/2022]
Abstract
The detection rates of extended-spectrum β-lactamase (ESBL)-producing bacteria in Japan are very low (∼5%) compared with those obtained worldwide. Further, the current trend of these bacteria in Japan is not known, and few studies with longitudinal observations have been reported. To obtain epidemiologic data on ESBL-producing bacteria, their genotypic features, and their antibiotic resistance patterns in Japan, we analyzed bacterial isolates from hospitalized patients at our institution over the 7-year period from 2003 to 2009. Of 2,304 isolates, 202 (8.8%) were found to be ESBL producers, including Escherichia coli, Klebsiella pneumonia, and Proteus mirabilis. The detection rates of the ESBL-producing isolates gradually increased and reached 17.1% and 10.5% for the E. coli and K. pneumoniae strains, respectively, in 2009. Genotyping analysis showed that ∼90% of the ESBL-producing isolates carried the CTX-M genotype, in which the CTX-M-9 group was predominant, although the CTX-M-2 group is considered to be the main genotype in Japan; further, many of the strains produced multiple β-lactamases. The detection rates of ESBL-producing bacteria may tend to be high within a limited region in Japan. A countrywide survey is required to understand the trend for ESBL-producing bacteria at the national level. In addition, our findings suggest that the genotypes of the detected ESBL producers are similar to those exhibiting a successful nosocomial spread worldwide.
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Affiliation(s)
- Y Chong
- Department of Blood and Marrow Transplantation, Hara-Sanshin Hospital, 1-8, Taihaku-cho Hakata-ku, Fukuoka, Japan.
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Tapsall JW, Limnios EA, Abu Bakar HMH, Darussalam B, Ping YY, Buadromo EM, Kumar P, Singh S, Lo J, Bala M, Risbud A, Deguchi T, Tanaka M, Watanabe Y, Lee K, Chong Y, Noikaseumsy S, Phouthavane T, Sam IC, Tundev O, Lwin KM, Eh PH, Goarant C, Goursaud R, Bathgate T, Brokenshire M, Latorre L, Velemu E, Carlos C, Leano S, Telan EO, Goh SS, Koh ST, Ngan C, Tan AL, Mananwatte S, Piyanoot N, Lokpichat S, Sirivongranson P, Fakahau M, Sitanilei H, Hung LV. Surveillance of antibiotic resistance in Neisseria gonorrhoeae in the WHO Western Pacific and South East Asian regions, 2007-2008. Commun Dis Intell Q Rep 2010; 34:1-7. [PMID: 20521493] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
Long-term surveillance of antimicrobial resistance in Neisseria gonorrhoeae has been conducted in the World Health Organization (WHO) Western Pacific Region (WPR) to optimise antibiotic treatment of gonococcal disease since 1992. In 2007 and 2008, this Gonococcal Antimicrobial Surveillance Programme (GASP) was enhanced by the inclusion of data from the South East Asian Region (SEAR) and recruitment of additional centres within the WPR. Approximately 17,450 N. gonorrhoeae were examined for their susceptibility to one or more antibiotics used for the treatment of gonorrhoea by external quality controlled methods in 24 reporting centres in 20 countries and/or jurisdictions. A high proportion of penicillin and/or quinolone resistance was again detected amongst isolates tested in North Asia and the WHO SEAR, but much lower rates of penicillin resistance and little quinolone resistance was present in most of the Pacific Island countries. The proportion of gonococci reported as 'resistant', 'less susceptible' or 'non-susceptible' gonococci to the third-generation cephalosporin antibiotic ceftriaxone lay in a wide range, but no major changes were evident in cephalosporin minimal inhibitory concentration (MIC) patterns in 2007-2008. Altered cephalosporin susceptibility was associated with treatment failures following therapy with oral third-generation cephalosporins. There is a need for revision and clarification of some of the in vitro criteria that are currently used to categorise the clinical importance of gonococci with different ceftriaxone and oral cephalosporin MIC levels. The number of instances of spectinomycin resistance remained low. A high proportion of strains tested continued to exhibit a form of plasmid mediated high level resistance to tetracyclines. The continuing emergence and spread of antibiotic resistant gonococci in and from the WHO WPR and SEAR supports the need for gonococcal antimicrobial resistance surveillance programs such as GASP to be maintained and potentially expanded.
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Yeo E, Chong Y. UP-3.157: The First Singapore Experience with PercSys Accordion® Stone Management Device. Urology 2009. [DOI: 10.1016/j.urology.2009.07.162] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Kim J, Lee C, Chong Y. Identification of potential influenza virus endonuclease inhibitors through virtual screening based on the 3D-QSAR model. SAR QSAR Environ Res 2009; 20:103-118. [PMID: 19343586 DOI: 10.1080/10629360902723962] [Citation(s) in RCA: 10] [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] [Indexed: 05/27/2023]
Abstract
Influenza endonucleases have appeared as an attractive target of antiviral therapy for influenza infection. With the purpose of designing a novel antiviral agent with enhanced biological activities against influenza endonuclease, a three-dimensional quantitative structure-activity relationships (3D-QSAR) model was generated based on 34 influenza endonuclease inhibitors. The comparative molecular similarity index analysis (CoMSIA) with a steric, electrostatic and hydrophobic (SEH) model showed the best correlative and predictive capability (q(2) = 0.763, r(2) = 0.969 and F = 174.785), which provided a pharmacophore composed of the electronegative moiety as well as the bulky hydrophobic group. The CoMSIA model was used as a pharmacophore query in the UNITY search of the ChemDiv compound library to give virtual active compounds. The 3D-QSAR model was then used to predict the activity of the selected compounds, which identified three compounds as the most likely inhibitor candidates.
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Affiliation(s)
- J Kim
- Department of Bioscience and Biotechnology, Konkuk University, Seoul 143-701, Korea
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Kim H, Kim M, Kim CK, Yong D, Lee K, Chong Y, Park JW, Riley T. P517 Toxigenic status of Korean Clostridium difficile isolates. Int J Antimicrob Agents 2007. [DOI: 10.1016/s0924-8579(07)70360-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Kim C, Ko E, Yum J, Yong D, Lee K, Chong Y. P1010 Increasing diversity of metallo-β-lactamases produced by Gram-negative bacilli at a Korean hospital in 2006. Int J Antimicrob Agents 2007. [DOI: 10.1016/s0924-8579(07)70851-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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32
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Kim J, Chong Y. Docking and binding mode analysis of aryl diketoacids (ADK) at the active site of HCV RNA-dependent RNA polymerase. Molecular Simulation 2006. [DOI: 10.1080/08927020601007538] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Chong Y, Karat I, Chaudhry A, Virjee J, Jiang W, Banerjee D, Mokbel K, Sharma A. 226 ORAL The relationship between the insulin-like growth factor-1 system ad breast cancer behaviour. Eur J Surg Oncol 2006. [DOI: 10.1016/s0748-7983(06)70661-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
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Lee K, Lim YS, Yong D, Yum JH, Chong Y. Evaluation of the Hodge test and the imipenem-EDTA double-disk synergy test for differentiating metallo-beta-lactamase-producing isolates of Pseudomonas spp. and Acinetobacter spp. J Clin Microbiol 2004; 41:4623-9. [PMID: 14532193 PMCID: PMC254300 DOI: 10.1128/jcm.41.10.4623-4629.2003] [Citation(s) in RCA: 345] [Impact Index Per Article: 17.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Gram-negative bacilli with acquired metallo-beta-lactamase (MBL) production have been increasingly reported in some countries, necessitating their detection. The aim of this study was to evaluate the performance of the Hodge test and those of the imipenem (IPM)-EDTA, ceftazidime (CAZ)-mercaptopropionic acid (MPA), and CAZ-sodium mercaptoacetic acid (SMA) double-disk synergy tests (DDSTs). The efficiencies of testing CAZ-resistant and IPM-nonsusceptible isolates were also compared. Strains used for the evaluation were known IMP-1 and VIM-2 MBL-producing isolates and consecutive and CAZ-nonsusceptible isolates of pseudomonads and acinetobacters. The performance of the Hodge test was improved by addition of zinc sulfate (140 microg/disk) to an IPM disk. In DDSTs, EDTA (ca. 1,900 microg) disks were better at detecting MBL-producing strains among pseudomonads, while MPA (3 microl) and SMA (3 mg) disks performed better for acinetobacters. EDTA (ca. 750 microg)-plus-SMA (ca. 2 mg) disks performed better than EDTA, MPA, or SMA disks with both organisms. CAZ-SMA DDSTs failed to detect 22 of 80 (28%) MBL-producing acinetobacters. In conclusion, use of an IPM disk and an EDTA (750 microg)-plus-SMA (2 mg) disk improves performance, and testing IPM-nonsusceptible isolates rather than CAZ-resistant isolates could reduce screening work. Further evaluation of the test is required for the detection of other types of MBL-producing gram-negative bacilli.
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Affiliation(s)
- K Lee
- Department of Laboratory Medicine, Research Institute of Bacterial Resistance, and BK21 Project for Medical Sciences, Yonsei University College of Medicine, Seodaemun-ku, Seoul 120-752, Korea
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Chong Y, Ikematsu H, Yamaji K, Nishimura M, Kashiwagi S, Hayashi J. Age-related accumulation of Ig V(H) gene somatic mutations in peripheral B cells from aged humans. Clin Exp Immunol 2003; 133:59-66. [PMID: 12823279 PMCID: PMC1808746 DOI: 10.1046/j.1365-2249.2003.02185.x] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
To investigate age-related alterations in human humoral immunity, we analysed Ig heavy chain variable region genes expressed by peripheral B cells from young and aged individuals. Three hundred and twenty-seven cDNA sequences, 163 micro and 164 gamma transcripts with VH5 family genes, were analysed for somatic hypermutation and VHDJH recombinational features. Unmutated and mutated micro transcripts were interpreted as being from naive and memory IgM B cells, respectively. In young and aged individuals, the percentages of naive IgM among total micro transcripts were 39% and 42%, respectively. D and JH segment usage in naive IgM from aged individuals was similar to that from young individuals. The mutational frequencies of memory IgM were similar in young and aged individuals. gamma transcripts, which are regarded as being from memory IgG B cells, showed a significantly higher mutational frequency (7.6%) in aged than in young individuals (5.8%) (P < 0.01). These findings suggest that VHDJH recombinational diversity was preserved, but that the accumulation of somatic mutations in the IgG VH region was increased in aged humans. The accumulation of somatic mutations in IgG B cells during ageing may imply that an age-related alteration exists in the selection and/or maintenance of peripheral memory B cells.
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Affiliation(s)
- Y Chong
- Department of General Medicine, Kyushu University, Fukuoka, Japan
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36
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Ariyama I, Chong Y, Murata M, Nabeshima S, Ikematsu H, Kashiwagi S, Hayashi J. The effectiveness of anti-retroviral drug therapy for HIV-1 is associated with HIV-1 proviral DNA levels and viral selection. J Int Med Res 2002; 30:289-300. [PMID: 12166346 DOI: 10.1177/147323000203000310] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [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: 11/17/2022] Open
Abstract
The effect of combination anti-retroviral therapy regimens on HIV-1 proviral DNA levels in peripheral blood mononuclear cells was examined in 12 HIV-1-positive patients, using endpoint dilution polymerase chain reaction and serial cloning, and sequencing of the gag region of HIV-1. The major clone was defined as the most numerous of 10 analysed clones, and observation periods ranged from 8 months to 32 months (mean 19.7 +/- 10.2 months). In five patients (one with primary-stage HIV-1 infection) receiving three anti-retroviral drugs, HIV-1 RNA reduced to undetectable levels (i.e. < or = 100 copies/ml). HIV-1 proviral DNA and the number of major clones reduced in four of these patients. HIV-1 RNA levels reduced, but remained detectable, in five other patients. In the two remaining patients (both receiving two rather than three anti-retroviral drugs), HIV-1 RNA levels increased. These results suggest that the population of major clones may be affected when HIV-1 RNA levels reduce following combination regimens of anti-retroviral therapy.
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Affiliation(s)
- I Ariyama
- Department of Environmental Medicine and Infectious Diseases, Faculty of Medical Sciences, Kyushu University Hospital, Fukuoka, Japan
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37
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Kang JL, Lee HW, Lee HS, Pack IS, Chong Y, Castranova V, Koh Y. Genistein prevents nuclear factor-kappa B activation and acute lung injury induced by lipopolysaccharide. Am J Respir Crit Care Med 2001; 164:2206-12. [PMID: 11751189 DOI: 10.1164/ajrccm.164.12.2104017] [Citation(s) in RCA: 110] [Impact Index Per Article: 4.8] [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: 11/16/2022] Open
Abstract
Protein tyrosine kinase (PTK) inhibitors have been proposed to reduce lung injury and lethal toxicity. The mechanisms responsible for the effects of PTK inhibitors remain obscure. The purpose of the present study was to examine whether genistein, a specific inhibitor of PTK, inhibits nuclear factor-kappa B (NF-kappaB) activation during acute lung injury induced by lipopolysaccharide (LPS) and, if so, to enumerate the effects of inhibition of NF-kappaB activation on LPS-induced proinflammatory gene products, such as cytokine-inducible neutrophil chemoattractant (CINC) and matrix metalloproteinase-9 (MMP-9), as well as neutrophil influx into the lungs. Intratracheal treatment of rats with LPS (6 mg/kg) resulted in increases in total protein and lactate dehydrogenase activity in bronchoalveolar lavage fluid and activated DNA-binding activity of NF-kappaB in alveolar macrophages and lung tissue. A 2-h pretreatment with genistein (50 mg/kg, intraperitoneally) inhibited the LPS-induced changes in lung injury parameters and the induction of NF-kappaB activation. Furthermore, these inhibitory effects of genistein correlated with a depression of LPS-induced protein tyrosine phosphorylation (approximately molecular masses of 46, 48, and 54 kD) and phosphorylation of Jun N-terminal kinase (JNK) in lung tissue. Genistein also substantially reduced the LPS-induced CINC production and MMP-9 activity and suppressed neutrophil recruitment. These results suggest that genistein attenuates LPS-induced acute lung responses through inhibition of NF-kappaB activation. In addition, NF-kappaB activation appears to be an important mechanism mediating LPS-induced CINC production and MMP-9 activity and resulting neutrophil recruitment associated with acute lung inflammation and injury.
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Affiliation(s)
- J L Kang
- Department of Physiology and Microbiology, Division of Cell Biology, Ewha Medical Research Center, Ewha Womans University College of Medicine, Seoul, Korea.
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38
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Chong Y, Ikematsu H, Ariyama I, Chijiwa K, Li W, Yamaji K, Kashiwagi S, Hayashi J. Evidence of B cell clonal expansion in HIV type 1-infected patients. AIDS Res Hum Retroviruses 2001; 17:1507-15. [PMID: 11709095 DOI: 10.1089/08892220152644214] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
HIV-1 infection results in a gradual decrease in CD4(+) T cell counts and progressive immune deficiency. Increased T cell turnover in HIV-1-infected patients, which can be interpreted as T cell clonal expansion, has been thought to be relevant to its pathogenesis. To investigate whether B cell clonal expansion also occurs in HIV-1-infected patients, we examined the expressed V(H)DJ(H) gene sequences of peripheral B cells in HIV-1-infected patients with hypergammaglobulinemia. Identical V(H)DJ(H) gene rearrangements with additional nucleotide differences in V(H) genes were analyzed as a marker of clonally related B cells. From healthy individuals and HIV-1-uninfected patients with hypergammaglobulinemia, clonally related B cells were detected in none of 10 (0%) and 2 of 10 (20%), respectively. No clonally related B cells were detected in any of the nine HIV-1-infected patients with detectable viral loads and normal Ig levels (0%). In contrast, from 9 of 14 HIV-1-infected patients with hypergammaglobulinemia (64%), clonally related B cells were detected. In addition, no HIV-1-infected patients who exhibited normal Ig levels after antiretroviral therapy had clonally related B cells. These findings suggest that B cell clonal expansion is present in HIV-1-infected patients with hypergammaglobulinemia.
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Affiliation(s)
- Y Chong
- Department of Environmental Medicine and Infectious Diseases, Faculty of Medical Sciences, Kyushu University, Fukuoka 812-8582, Japan
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Li W, Ikematsu H, Yamaji TK, Chong Y, Hayashi J, Kashiwagi S. Hepatitis B virus genomes of chronic hepatitis patients do not contain specific mutations related to acute exacerbation. Dig Dis Sci 2001; 46:2104-12. [PMID: 11680583 DOI: 10.1023/a:1011938209828] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
To determine the specific viral variants associated with acute exacerbation of chronic hepatitis from hepatitis B virus (HBV) infection, we analyzed the complete nucleotide sequences of the HBV genome in serial serum samples from two chronic active hepatitis patients who seroconverted from HBeAg to anti-HBe. HBV DNA was amplified by polymerase chain reaction (PCR) and sequenced. A 1896 precore stop codon mutant (G to A at nt 1896) coexisting with the wild sequence was found in both patients prior to seroconversion from HBeAg to anti-HBe. Core promoter mutations at nucleotide positions 1762 (A to T) and 1764 (G to A) were found in both patients throughout the observation period. Mutations were observed in the HBV genome of the two patients at different time points, and there was no correlation between the mutations and liver disease or DNA polymerase levels. The nucleotide divergence rate and the composition of quasispecies in the HBV sequence at the time of acute exacerbation were almost the same as were found at other time points. These results suggest that acute exacerbation does not appear to be caused by a characteristic HBV species. The multiple factors that cause generalized HBV replication activation may contribute to acute exacerbation.
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Affiliation(s)
- W Li
- Department of Environmental Medicine and Infectious Diseases, Graduate School of Medical Sciences, Kyushu University, Japan
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40
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Lee K, Lim JK, Yong D, Yum J, Chong Y, Okamoto R, Inoue M. Evaluation of efficiency of screening extended-spectrum beta-lactamase-producing Escherichia coli and Klebsiella pneumoniae in hospitals where the bacteria are increasingly prevalent. J Clin Microbiol 2001; 39:3696-9. [PMID: 11574594 PMCID: PMC88410 DOI: 10.1128/jcm.39.10.3696-3699.2001] [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: 11/20/2022] Open
Abstract
The disk screening methods for extended-spectrum beta-lactamase-producing strains were evaluated. The confirmatory work is reduced significantly in settings such as those in this study, by changing the cefpodoxime breakpoint to < or =20 mm and by not testing cefoxitin-resistant isolates. Cefotaxime and ceftazidime disk screening is reliable, and the laboratory-prepared cefotaxime- and ceftazidime-clavulanic acid disks are stable at -20 degrees C for 12 weeks.
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Affiliation(s)
- K Lee
- Department of Clinical Pathology, Research Institute of Bacterial Resistance, and BK21 Project for Medical Sciences, Yonsei University College of Medicine, Seoul, Korea
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41
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Jeong SH, Kim WM, Chang CL, Kim JM, Lee K, Chong Y, Hwang HY, Baek YW, Chung HK, Woo IG, Ku JY. Neonatal intensive care unit outbreak caused by a strain of Klebsiella oxytoca resistant to aztreonam due to overproduction of chromosomal beta-lactamase. J Hosp Infect 2001; 48:281-8. [PMID: 11461129 DOI: 10.1053/jhin.2001.1018] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Klebsiella oxytoca strains resistant to both aztreonam and ceftriaxone were isolated from six neonates in a neonatal intensive care unit and water reservoirs of two humidifiers attached to the neonatal incubators. These isolates were assumed to be of the same clone because they were characterized by the same antimicrobial susceptibility and pulsed field gel electrophoresis patterns. It was established that the drug resistance was attributed to overproduction of chromosomally encoded Kl beta-lactamase. It was determined that an isolate (K. oxytoca H1) contained a high enzyme concentration (27microg/100microg of protein in enzyme extracts), at least 27 times higher than the control K. oxytoca N1. It was also demonstrated that isolates had a point mutation in the - 35 concensus region of the promotor gene of bla(OXY-2)leading to enzyme overproduction. Outbreaks caused by K1 hyperproducers have not previously been described.
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Affiliation(s)
- S H Jeong
- Department of Clinical Pathology, Kosin University College of Medicine, Pusan, Korea.
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42
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Chong Y, Ikematsu H, Yamamoto M, Chijiwa K, Ariyama I, Li W, Hayashi J, Shirai T, Kashiwagi S. [Effect of highly active antiretroviral therapy (HAART) on hypergammaglobulinemia in HIV infected patients]. Kansenshogaku Zasshi 2001; 75:535-40. [PMID: 11521275 DOI: 10.11150/kansenshogakuzasshi1970.75.535] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
To investigate the mechanism of hypergammaglobulinemia in HIV infected patients, the effect of highly active antiretroviral therapy (HAART) on the hypergammaglobulinemia was analyzed. Involved in this study were 34 untreated, 21 HAART-effective (complete response) and 14 HAART-non-effective (partial response) patients. Serum levels of HIV-RNA and gammaglobulin and immunoglobulin (Ig) isotypes were measured. Mean HIV-RNA levels of untreated and partial response patients were 1.6 x 10(4) copies/ml and 0.4 x 10(4) copies/ml, respectively. HIV-RNA levels of all complete response patients were below 4.0 x 10(2) copies/ml. Mean gammaglobulin percentages of untreated, partial response and complete response patients were 24.4%, 21.8% and 17.9%, respectively (p < 0.01 in untreated vs complete response patients). Mean IgG levels in the three groups were 2,489 mg/dl, 1,947 mg/dl and 1,618 mg/dl, respectively (p < 0.001 in untreated vs complete response patients). IgA levels were high in some untreated patients and lower in complete response patients. IgE levels were increased in some untreated and partial response patients, but there was no significant difference among the three groups. These results suggested that the hypergammaglobulinemia found in HIV infected patients was associated with HIV replication. The activation mechanism might differ by Ig isotypes.
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Affiliation(s)
- Y Chong
- Department of Environmental Medicine and Infectious Diseases, Internal Medicine, Medicine and Surgery, Graduate School of Medical Sciences, Kyushu University
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43
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Lee K, Lee HS, Jang SJ, Park AJ, Lee MH, Song WK, Chong Y. Antimicrobial resistance surveillance of bacteria in 1999 in Korea with a special reference to resistance of enterococci to vancomycin and gram-negative bacilli to third generation cephalosporin, imipenem, and fluoroquinolone. J Korean Med Sci 2001; 16:262-70. [PMID: 11447969 PMCID: PMC3054736 DOI: 10.3346/jkms.2001.16.3.262] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
The trend of antimicrobial resistance of bacteria isolated from patients in 30 Korean hospitals in 1999 was analyzed with a particular attention to cefotaxime- or fluoroquinolone-resistant gram-negative bacilli, imipenem-resistant Pseudomonas aeruginosa, and vancomycin-resistant enterococci. Adequacy of susceptibility testing, and any change in the frequencies of isolated species were also analyzed. The results showed that only 20% and 30% of hospitals tested the piperacillin-tazobactam and cefoxitin susceptibility of Enterobacteriaceae, respectively, only 24% of hospitals the piperacillin-tazobactam susceptibility of P. aeruginosa, and 17% of hospitals the fusidic acid susceptibility of staphylococci. Among the isolates 26.3% were glucose-nonfermenting gram-negative bacilli, and 34.7% of Enterococcus were Enterococcus faecium. Slight decline of cefotaxime-resistance rate to 20% was noted in Klebsiella pneumoniae, while fluoroquinolone-resistance rate was 68% in Acinetobacter baumannii. The ceftazidime- and imipenem-resistance rates were 17% and 18%, respectively in P. aeruginosa. The vancomycin-resistance rate of E. faecium rose significantly to 15.1%, but the rates varied significantly depending on hospitals suggesting presence of different degree of selective pressure or nosocomial spread. In conclusion, the prevalence of imipenem-resistant P. aeruginosa and the increase of vancomycin-resistant E. faecium were the particularly worrisome phenomena observed in this study.
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Abstract
[reaction: see text] Carbocyclic L-2'deoxynucleosides 17 were synthesized on solid phase in four steps from the appropriately protected intermedate 11. The Mitsunobu reaction was used as a condensation method between the carbocyclic moiety and heterocyclic bases. The regioselectivity of the carbocyclic nucleosides was compared between the solid and solution phase syntheses.
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Affiliation(s)
- H Choo
- Department of Pharmaceutical and Biomedical Sciences, College of Pharmacy, The University of Georgia, Athens, Georgia 30602-2352, USA
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45
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Yu CJ, Wang H, Wan Y, Yowanto H, Kim JC, Donilon LH, Tao C, Strong M, Chong Y. 2'-Ribose-ferrocene oligonucleotides for electronic detection of nucleic acids. J Org Chem 2001; 66:2937-42. [PMID: 11325257 DOI: 10.1021/jo001283g] [Citation(s) in RCA: 52] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
We have synthesized two novel phosphoramidites with a ferrocenyl moiety at the 2'-ribose position linked through a butoxy linker. Using automated DNA/RNA synthesis techniques, oligonucleotides containing ferrocene at various positions were prepared and characterized by HPLC, MALDI-TOF mass spectrometry, and electrochemistry. Thermal stability studies of the ferrocene-modified DNA duplexes revealed that introduction of one or two ferrocenyl complexes does not result in an observed change of the T(m) values of the corresponding DNA duplexes when compared to the nonmodified hybrids. These data indicate that the introduction of a ferrocenyl group at the 2'-position of the ribose ring containing either a purine or pyrimidine base has no effect on the stability of the modified DNA. The electrochemical behavior of the ferrocene-containing DNA was examined by cyclic voltammetry. The modified 2'-ferrocene-oligonucleotides are electrochemically active and can be used as signaling probes for the electronic detection of nucleic acids on bioelectronic sensors.
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Affiliation(s)
- C J Yu
- Clinical Micro Sensors, Motorola Inc., 757 S. Raymond Ave, Pasadena, California 91105, USA.
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46
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Liebowitz LD, Ashbee HR, Evans EG, Chong Y, Mallatova N, Zaidi M, Gibbs D. A two year global evaluation of the susceptibility of Candida species to fluconazole by disk diffusion. Diagn Microbiol Infect Dis 2001; 40:27-33. [PMID: 11448560 DOI: 10.1016/s0732-8893(01)00243-7] [Citation(s) in RCA: 107] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
The in-vitro activity of fluconazole against 46,831 yeast isolates collected over a two-year period from 57 laboratories in 33 countries worldwide was assessed using a disc diffusion method. Candida albicans was the organism isolated most frequently, accounting for 68.6% of the total number of isolates. C. glabrata, C. tropicalis, C parapsilosis and C. krusei and Cryptococcus neoformans represented 9.9, 4.7, 4.3, 1.9, and 1.4% of isolates respectively during the 2 year period and rates varied markedly between countries. In 1999 data blood isolates represented 4.9% of all isolates and intensive care unit isolates represented 9.9%. In both the 1998 and 1999 data, 99% of C. albicans were fully susceptible (S) to fluconazole, and 95.6% of all species of yeasts tested were S or susceptible-dose dependent (S-DD) to fluconazole. No emerging trends of resistance were noted with any of the Candida spp. tested as 96% of all isolates retained susceptibility (S or S-DD) to this agent.
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Affiliation(s)
- L D Liebowitz
- Department of Medical Microbiology, University of the Witwatersrand and SAIMR, P.O. Box 1038, 2000, Johannesburg, South Africa
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47
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Lee K, Chong Y, Chu CK. Understanding the mode of action of L-nucleosides as antiviral agents: a molecular modeling approach. Nucleosides Nucleotides Nucleic Acids 2001; 20:385-8. [PMID: 11563052 DOI: 10.1081/ncn-100002311] [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] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
Computer modeling studies have been performed on the several pairs of D- and L-nucleoside inhibitors with the HIV-1 RT model. Additionally, clinically important M184V mutation, which confers the viral resistance against 3TC and FTC, were studied by the same modeling system.
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Affiliation(s)
- K Lee
- Department of Pharmaceutical and Biomedical Sciences, College of Pharmacy, University of Georgia, Athens, Georgia 30602, USA
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48
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Lee K, Chong Y, Shin HB, Kim YA, Yong D, Yum JH. Modified Hodge and EDTA-disk synergy tests to screen metallo-beta-lactamase-producing strains of Pseudomonas and Acinetobacter species. Clin Microbiol Infect 2001; 7:88-91. [PMID: 11298149 DOI: 10.1046/j.1469-0691.2001.00204.x] [Citation(s) in RCA: 334] [Impact Index Per Article: 14.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Affiliation(s)
- K Lee
- Department of Clinical Pathology and Research Institute of Bacterial Resistance, Yonsei University College of Medicine, C.P.O. Box 8044, Seoul, Korea
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49
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Abstract
Resistance of bacteria to antimicrobial agents is a worldwide concern. In Korea, resistant bacteria are more prevalent than in other industrialized countries. Methicillin-resistant Staphylococcus aureus, erythromycin-resistant Streptococcus pyogenes, penicillin non-susceptible pneumococci, beta-lactamase-producing gonococci, extended-spectrum beta-lactamase (ESBL)-producing Escherichia coli and Klebsiella pneumoniae, class C beta-lactamase-producing E. coli, fluoroquinolone-resistant E. coli, and aminoglycoside-resistant Acinetobacter baumannii and Pseudomonas aeruginosa are examples of resistant bacteria prevalent in Korea, and their presence suggests a high level of antimicrobial selective pressure and the nosocomial spread of resistant bacteria. Recently observed rapid increases in the incidence of vancomycin-resistant Enterococcus faecium and carbapenem-resistant P. aeruginosa present new threats in Korea.
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Affiliation(s)
- Y Chong
- Department of Clinical Pathology, Research Institute of Bacterial Resistance, Yonsei University College of Medicine, C.P.O. Box 8044, Seoul, Korea.
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50
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Umek RM, Lin SS, Chen Yp Y, Irvine B, Paulluconi G, Chan V, Chong Y, Cheung L, Vielmetter J, Farkas DH. Bioelectronic detection of point mutations using discrimination of the H63D polymorphism of the Hfe gene as a model. Mol Diagn 2000; 5:321-8. [PMID: 11172496 DOI: 10.1007/bf03262093] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
Abstract
BACKGROUND A bioelectronic detection platform has recently been developed that facilitates the detection and characterization of nucleic acids. The DNA chip platform is compatible with homogeneous assays because separate labeling and wash steps are not required. A one-step, bioelectronic detection assay was developed to genotype patient samples with respect to the H63D polymorphism of the Hfe gene, associated with hereditary hemochromatosis. METHODS AND RESULTS Electrode arrays were modified with DNA capture probes that were perfectly matched to the wild-type or mutant allele of H63D. Amplicons containing the polymorphic site were hybridized with the capture probes on the electrode arrays in the presence of electronically labeled reporter (signaling) probes. Voltammetric analysis of the electrode arrays was conducted first at ambient temperature and then at elevated temperature. The electronic signal was preferentially diminished at elevated temperature from electrodes that hybridized with mismatched target amplicons. CONCLUSION An assay for bioelectronic genotyping of the H63D polymorphism was developed and used with six patient specimens to show the feasibility of this system as a model for point mutation detection.
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Affiliation(s)
- R M Umek
- Clinical Micro Sensors Division of Motorola, Inc, 757 South Raymond Ave., Pasadena, CA 91105, USA
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