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Kim CG, Hong MH, Kim D, Lee BH, Kim H, Ock CY, Kelly G, Bang YJ, Kim G, Lee JE, Kim C, Kim SH, Hong HJ, Park YM, Sim NS, Park H, Park JW, Lee CG, Kim KH, Park G, Jung I, Han D, Kim JH, Cha J, Lee I, Kang M, Song H, Oum C, Kim S, Kim S, Lim Y, Kim-Schulze S, Merad M, Yoon SO, Kim HJ, Koh YW, Kim HR. A phase II open-label randomized clinical trial of preoperative durvalumab or durvalumab plus tremelimumab in resectable head and neck squamous cell carcinoma. Clin Cancer Res 2024:735107. [PMID: 38457288 DOI: 10.1158/1078-0432.ccr-23-3249] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2023] [Revised: 01/06/2024] [Accepted: 03/06/2024] [Indexed: 03/10/2024]
Abstract
PURPOSE Clinical implications of neoadjuvant immunotherapy in patients with locally advanced but resectable head and neck squamous cell carcinoma (HNSCC) remain largely unexplored. PATIENTS AND METHODS Patients with resectable HNSCC were randomized to receive a single dose of preoperative durvalumab (D) with or without tremelimumab (T) before resection, followed by postoperative (chemo)radiation based on multidisciplinary discretion and 1-year D treatment. Artificial intelligence (AI)-powered spatial distribution analysis of tumor-infiltrating lymphocytes and high-dimensional profiling of circulating immune cells tracked dynamic intratumoral and systemic immune responses. RESULTS Of the 48 patients enrolled (D: 24 patients, D+T: 24 patients), 45 underwent surgical resection per protocol (D: 21 patients; D+T: 24 patients). D+/-T had a favorable safety profile and did not delay surgery. Distant recurrence-free survival (DRFS) was significantly better in patients treated with D+T than in those treated with D monotherapy. AI-powered whole-slide image analysis demonstrated that D+T significantly reshaped the tumor microenvironment toward immune-inflamed phenotypes, in contrast to D monotherapy or cytotoxic chemotherapy. High-dimensional profiling of circulating immune cells revealed a significant expansion of T cell subsets characterized by proliferation and activation in response to D+T therapy, which was rare following D monotherapy. Importantly, expansion of specific clusters in CD8+ T cells and non-regulatory CD4+ T cells with activation and exhaustion programs was associated with prolonged DRFS in patients treated with D+T. CONCLUSIONS Preoperative D+/-T is feasible and may benefit patients with resectable HNSCC. Distinct changes in the tumor microenvironment and circulating immune cells were induced by each treatment regimen, warranting further investigation.
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Affiliation(s)
- Chang Gon Kim
- Yonsei University College of Medicine, Seoul, Korea (South), Republic of
| | - Min Hee Hong
- Yonsei Cancer Center, Seoul, Korea (South), Republic of
| | - Dahee Kim
- Yonsei University College of Medicine, Seoul, Korea (South), Republic of
| | - Brian Hyohyoung Lee
- Seoul National University Graduate School, Seoul, Korea (South), Republic of
| | - Hyunwook Kim
- Yonsei University College of Medicine, Seoul, Korea (South), Republic of
| | | | - Geoffrey Kelly
- Icahn School of Medicine at Mount Sinai, New York, NY, United States
| | - Yoon Ji Bang
- Seoul National University College of Medicine, Korea (South), Republic of
| | - Gamin Kim
- Yonsei University College of Medicine, seoul, Korea (South), Republic of
| | - Jung Eun Lee
- Yonsei University College of Medicine, seoul, Korea (South), Republic of
| | - Chaeyeon Kim
- Yonsei University College of Medicine, Seoul, Korea (South), Republic of
| | - Se-Heon Kim
- Yonsei University College of Medicine, Seoul, Korea (South), Republic of
| | - Hyun Jun Hong
- Yonsei University College of Medicine, Seoul, Korea (South), Republic of
| | - Young Min Park
- Yonsei University College of Medicine, Seoul, Korea (South), Republic of
| | - Nam Suk Sim
- Yonsei University College of Medicine, Severance Hospital, Seoul, Korea (South), Republic of
| | - Heejung Park
- Yonsei University College of Medicine, seoul, Korea (South), Republic of
| | - Jin Woo Park
- Severance Hospital, Seoul, Korea (South), Republic of
| | - Chang Geol Lee
- Yonsei Cancer CTR, Seoul, seodaemun-gu, Korea (South), Republic of
| | - Kyung Hwan Kim
- Yonsei University College of Medicine, Seoul, Korea (South), Republic of
| | - Goeun Park
- Yonsei University College of Medicine, Seoul, Korea (South), Republic of
| | - Inkyung Jung
- University of Ulsan College of Medicine, Korea (South), Republic of
| | - Dawoon Han
- Yonsei University College of Medicine, Seoul, Korea (South), Republic of
| | - Jong Hoon Kim
- Yonsei University College of Medicine, Seoul, Korea (South), Republic of
| | - Junha Cha
- Yonsei University, Seoul, Korea (South), Republic of
| | - Insuk Lee
- Yonsei University, Seoul, Korea (South), Republic of
| | | | - Heon Song
- Lunit, Seoul, Korea (South), Republic of
| | | | | | - Sukjun Kim
- Lunit, Seoul, Korea (South), Republic of
| | | | | | - Miriam Merad
- Precision Immunology Institute, New York, NY, United States
| | - Sun Och Yoon
- Severance Hospital, Seoul, Korea (South), Republic of
| | - Hyun Je Kim
- Seoul National University College of Medicine, Korea (South), Republic of
| | - Yoon Woo Koh
- Yonsei University College of Medicine, Seoul, Korea (South), Republic of
| | - Hye Ryun Kim
- Yonsei University College of Medicine, Seoul, Korea (South), Republic of
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Park JO, Kim JH, Joo YH, Kim SY, Kim GJ, Kim HB, Lee DH, Hong HJ, Park YM, Chung EJ, Ji YB, Oh KH, Lee HS, Lee DK, Park KN, Ban MJ, Kim BH, Kim DH, Cho JK, Ahn DB, Kim MS, Seok JG, Jang JY, Choi HG, Kim HJ, Park SJ, Jung EK, Kim YS, Hong YT, Lee YC, Won HR, Shin SC, Baek SK, Kwon SY. Guideline for the Surgical Management of Locally Invasive Differentiated Thyroid Cancer From the Korean Society of Head and Neck Surgery. Clin Exp Otorhinolaryngol 2023; 16:1-19. [PMID: 36634669 PMCID: PMC9985989 DOI: 10.21053/ceo.2022.01732] [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: 12/14/2022] [Accepted: 01/11/2023] [Indexed: 01/12/2023] Open
Abstract
The aim of this study was to develop evidence-based recommendations for determining the surgical extent in patients with locally invasive differentiated thyroid cancer (DTC). Locally invasive DTC with gross extrathyroidal extension invading surrounding anatomical structures may lead to several functional deficits and poor oncological outcomes. At present, the optimal extent of surgery in locally invasive DTC remains a matter of debate, and there are no adequate guidelines. On October 8, 2021, four experts searched the PubMed, Embase, and Cochrane Library databases; the identified papers were reviewed by 39 experts in thyroid and head and neck surgery. The Grading of Recommendations Assessment, Development and Evaluation (GRADE) approach was used to assess the quality of evidence, and to develop and report recommendations. The strength of a recommendation reflects the confidence of a guideline panel that the desirable effects of an intervention outweigh any undesirable effects, across all patients for whom the recommendation is applicable. After completing the draft guidelines, Delphi questionnaires were completed by members of the Korean Society of Head and Neck Surgery. Twenty-seven evidence-based recommendations were made for several factors, including the preoperative workup; surgical extent of thyroidectomy; surgery for cancer invading the strap muscles, recurrent laryngeal nerve, laryngeal framework, trachea, or esophagus; and surgery for patients with central and lateral cervical lymph node involvement. Evidence-based guidelines were devised to help clinicians make safer and more efficient clinical decisions for the optimal surgical treatment of patients with locally invasive DTC.
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Affiliation(s)
- Jun-Ook Park
- Department of Otolaryngology-Head and Neck Surgery, College of Medicine, The Catholic University of Korea, Seoul, Korea
| | - Joo Hyun Kim
- Department of Otolaryngology-Head and Neck Surgery, Yonsei University College of Medicine, Seoul, Korea
| | - Young Hoon Joo
- Department of Otolaryngology-Head and Neck Surgery, College of Medicine, The Catholic University of Korea, Seoul, Korea
| | - Sang-Yeon Kim
- Department of Otolaryngology-Head and Neck Surgery, College of Medicine, The Catholic University of Korea, Seoul, Korea
| | - Geun-Jeon Kim
- Department of Otolaryngology-Head and Neck Surgery, College of Medicine, The Catholic University of Korea, Seoul, Korea
| | - Hyun Bum Kim
- Department of Otolaryngology-Head and Neck Surgery, College of Medicine, The Catholic University of Korea, Seoul, Korea
| | - Dong-Hyun Lee
- Department of Otolaryngology-Head and Neck Surgery, College of Medicine, The Catholic University of Korea, Seoul, Korea
| | - Hyun Jun Hong
- Department of Otolaryngology-Head and Neck Surgery, Yonsei University College of Medicine, Seoul, Korea
| | - Young Min Park
- Department of Otolaryngology-Head and Neck Surgery, Yonsei University College of Medicine, Seoul, Korea
| | - Eun-Jae Chung
- Department of Otolaryngology-Head and Neck Surgery, Seoul National University College of Medicine, Seoul, Korea
| | - Yong Bae Ji
- Department of Otolaryngology-Head and Neck Surgery, Hanyang University College of Medicine, Seoul, Korea
| | - Kyoung Ho Oh
- Department of Otolaryngology-Head and Neck Surgery, Korea University College of Medicine, Seoul, Korea
| | - Hyoung Shin Lee
- Department of Otolaryngology-Head and Neck Surgery, Kosin University College of Medicine, Busan, Korea
| | - Dong Kun Lee
- Department of Otolaryngology-Head and Neck Surgery, Dong-A University College of Medicine, Busan, Korea
| | - Ki Nam Park
- Department of Otolaryngology-Head and Neck Surgery, Soonchunhyang University College of Medicine, Asan, Korea
| | - Myung Jin Ban
- Department of Otolaryngology-Head and Neck Surgery, Soonchunhyang University College of Medicine, Asan, Korea
| | - Bo Hae Kim
- Department of Otolaryngology-Head and Neck Surgery, Dongguk University College of Medicine, Goyang, Korea
| | - Do Hun Kim
- Department of Otolaryngology-Head and Neck Surgery, College of Medicine, Inje University, Busan, Korea
| | - Jae-Keun Cho
- Department of Otolaryngology-Head and Neck Surgery, College of Medicine, Inje University, Busan, Korea
| | - Dong Bin Ahn
- Department of Otolaryngology-Head and Neck Surgery, School of Medicine, Kyungpook National University, Daegu, Korea
| | - Min-Su Kim
- Department of Otolaryngology-Head and Neck Surgery, CHA University School of Medicine, Seongnam, Korea
| | - Jun Girl Seok
- Department of Otolaryngology-Head and Neck Surgery, National Cancer Center, Goyang, Korea
| | - Jeon Yeob Jang
- Department of Otolaryngology-Head and Neck Surgery, Ajou University School of Medicine, Suwon, Korea
| | - Hyo Geun Choi
- Department of Otolaryngology-Head and Neck Surgery, Hallym University College of Medicine, Chuncheon, Korea
| | - Hee Jin Kim
- Department of Otolaryngology-Head and Neck Surgery, Hallym University College of Medicine, Chuncheon, Korea
| | - Sung Joon Park
- Department of Otolaryngology-Head and Neck Surgery, Chung-Ang University College of Medicine, Seoul, Korea
| | - Eun Kyung Jung
- Department of Otolaryngology-Head and Neck Surgery, Chonnam National University Medical School, Kwangju, Korea
| | - Yeon Soo Kim
- Department of Otolaryngology-Head and Neck Surgery, Konyang University College of Medicine, Daejeon, Korea
| | - Yong Tae Hong
- Department of Otolaryngology-Head and Neck Surgery, Jeonbuk National University Medical School, Jeonju, Korea
| | - Young Chan Lee
- Department of Otolaryngology-Head and Neck Surgery, College of Medicine, Kyung Hee University, Seoul, Korea
| | - Ho-Ryun Won
- Department of Otolaryngology-Head and Neck Surgery, Chungnam National University College of Medicine, Daejeon, Korea
| | - Sung-Chan Shin
- Department of Otolaryngology-Head and Neck Surgery, Pusan National University School of Medicine, Yangsan, Korea
| | - Seung-Kuk Baek
- Department of Otolaryngology-Head and Neck Surgery, Korea University College of Medicine, Seoul, Korea
| | - Soon Young Kwon
- Department of Otolaryngology-Head and Neck Surgery, Korea University College of Medicine, Seoul, Korea
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Zhang L, Hong HJ, Duan BD, Zhang Y, Shao CC, Wang LN, Jiao X, Du YJ, Zou YQ, Ma YY. Neutrophil-lymphocyte ratio and hypersensitive C-reaction protein are associated with miscarriage during the second trimester of pregnancy. J BIOL REG HOMEOS AG 2021; 35:889-900. [PMID: 34013686 DOI: 10.23812/20-579-a] [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] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
This study investigated whether biomarkers in the second trimester of pregnancy, including the white blood cell (WBC) count, neutrophil-lymphocyte ratio (NLR), hypersensitive C-reactive protein (hs-CRP) concentration, and procalcitonin (PCT) concentration, were associated with miscarriage during the second trimester of pregnancy. Sixty-two asymptomatic patients in their second trimester of pregnancy were included in the control group (group A). Among 67 patients diagnosed with late threatened miscarriage, 46 patients with ongoing pregnancy were included in group B and 21 patients with subsequent miscarriage were included in group C. The serum of these patients was collected and the biomarkers were analyzed. A paired-samples t-test was used for the comparison between the groups before and after the miscarriage. Statistical significance was set at p<0.05. Receiver operating characteristic curve (ROC) analysis was performed to evaluate the predictive value of different biomarkers for miscarriage during the second trimester of pregnancy. WBC count, neutrophil percentage, and hs-CRP levels were significantly higher in group C than in groups A and B (p<0.05). Lymphocyte percentage and albumin levels decreased significantly from group A to group C (p<0.05). In contrast, NLR increased significantly from group A to group C (p<0.05). There was a significant decrease in the WBC count, neutrophil percentage, hemoglobin concentration, and post-miscarriage NLR among the cases with miscarriage (p<0.05). The area under the curve of WBC count, NLR, hs-CRP, and the combination of these three factors for the prediction of late miscarriage varied from 78.0% to 82.6%. The combination of these three factors had the highest specificity of 91.1%, while hs-CRP had the highest sensitivity of 88.9%. WBC count, NLR, and hs-CRP levels are strongly associated with miscarriage during the second trimester of pregnancy, indicating that they are potential predictive biomarkers.
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Affiliation(s)
- L Zhang
- Department of Obstetrics and Gynecology, Qilu Hospital, Cheeloo College of Medicine, Shandong University, Ji'nan, China.,Department of Obstetrics, The Second Hospital, Cheeloo College of Medicine, Shandong University, Ji'nan, China
| | - H J Hong
- Department of Obstetrics, The Second Hospital, Cheeloo College of Medicine, Shandong University, Ji'nan, China
| | - B D Duan
- Department of Obstetrics, Zibo Central hospital, Zibo, China
| | - Y Zhang
- Clinical Epidemiology Unit, Qilu Hospital, Cheeloo College of Medicine, Shandong University, Ji'nan, China.,Clinical Research Center, Cheeloo College of Medicine, Shandong University, Ji'nan, China
| | - C C Shao
- Center of Evidence-based Medicine, The Second Hospital, Cheeloo College of Medicine, Shandong University, Ji'nan, China
| | - L N Wang
- Department of Clinical Laboratory Medicine, The Second Hospital, Cheeloo College of Medicine, Shandong University, Ji'nan, China
| | - X Jiao
- School of Medicine, Cheeloo College of Medicine, Shandong University, Ji'nan, China
| | - Y J Du
- School of Medicine, Cheeloo College of Medicine, Shandong University, Ji'nan, China
| | - Y Q Zou
- School of Medicine, Cheeloo College of Medicine, Shandong University, Ji'nan, China
| | - Y Y Ma
- Department of Obstetrics and Gynecology, Qilu Hospital, Cheeloo College of Medicine, Shandong University, Ji'nan, China
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Kim JH, Kim DH, Lim JY, Won HR, Shin YS, Kim CH, Ban MJ, Park JH, Byeon HK, Hong HJ, Choi EC, Koh WY. Effect of human acellular dermal matrix (Megaderm™) on infra-auricular depressed deformities, Frey's syndrome, and first bite syndrome following parotidectomy: a multi-center prospective study. Gland Surg 2021; 10:670-677. [PMID: 33708549 DOI: 10.21037/gs-20-703] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
Background Parotidectomy is the primary treatment for parotid gland tumors. However, complications may include a prominent facial scar or infra-auricular depressed deformity, Frey's syndrome, first bite syndrome, or other facial pain, numbness, and paralysis. Acellular dermal matrix (ADM) has been widely used to prevent these complications in parotid surgery, but there have been no prospective, multi-center trials documenting its efficacy. This study evaluates the effectiveness of ADM implantation in preventing infra-auricular depressed deformity, Frey's syndrome and first bite syndrome after parotidectomy. Methods We analyzed 51 cases of standard parotidectomy and 58 cases of parotidectomy with implantation of Megaderm™ ADM through prospective multicenter trial. Acute complications including infection, seroma, hematoma, skin necrosis, and acute parotid area pain were evaluated 1 week postoperatively. Clinician grading of Frey's syndrome and blinded clinician evaluation of infra-auricular depressed deformities were conducted at 3, 6, and 12 months. Patients evaluated subjective satisfaction with neck appearance, Frey's syndrome quality, and acute parotid area pain at 3, 6, and 12 months. Results There was a higher incidence of seroma in the Megaderm™ group than in the control group at week 1. The incidence and total clinician-evaluated Frey's syndrome scores were significantly lower in the Megaderm™ group than in the control group at 3, 6, and 12 months. Both the objective and subjective evaluations of the facial contour showed a better outcome in the Megaderm™ group compared to the control group at 3, 6, and 12 months. There were no significant differences between the groups in the patient-reported Frey's syndrome quality scores at 3, 6, and 12 months, but the Megaderm™ group reported significantly less acute pain than the control group. Conclusions ADM implantation can effectively reduce the occurrence of Frey's syndrome, infra-auricular depressed deformity, and first bite syndrome after parotidectomy. ADM may be especially advantageous in complex parotidectomy cases when significant complications are expected.
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Affiliation(s)
- Joo Hyun Kim
- Department of Otorhinolaryngology-Head and Neck Surgery, Yonsei University College of Medicine, Seoul, Republic of Korea
| | - Da Hee Kim
- Department of Otorhinolaryngology-Head and Neck Surgery, Yonsei University College of Medicine, Seoul, Republic of Korea
| | - Jae-Yol Lim
- Department of Otorhinolaryngology-Head and Neck Surgery, Yonsei University College of Medicine, Seoul, Republic of Korea
| | - Ho-Ryun Won
- Department of Otorhinolaryngology-Head and Neck Surgery, Chungnam National University College of Medicine, Daejeon, Republic of Korea
| | - Yoo Seob Shin
- Department of Otorhinolaryngology-Head and Neck Surgery, Ajou University College of Medicine, Kungki-do, Republic of Korea
| | - Chul-Ho Kim
- Department of Otorhinolaryngology-Head and Neck Surgery, Ajou University College of Medicine, Kungki-do, Republic of Korea
| | - Myung Jin Ban
- Department of Otorhinolaryngology-Head and Neck Surgery, Soonchunhyang University College of Medicine, Cheonan, Republic of Korea
| | - Jae Hong Park
- Department of Otorhinolaryngology-Head and Neck Surgery, Soonchunhyang University College of Medicine, Cheonan, Republic of Korea
| | - Hyung Kwon Byeon
- Department of Otorhinolaryngology-Head and Neck Surgery, Soonchunhyang University College of Medicine, Cheonan, Republic of Korea
| | - Hyun Jun Hong
- Department of Otorhinolaryngology-Head and Neck Surgery, Catholic Kwandong University College of Medicine, Incheon, Republic of Korea
| | - Eun Chang Choi
- Department of Otorhinolaryngology-Head and Neck Surgery, Yonsei University College of Medicine, Seoul, Republic of Korea
| | - Woon Yoo Koh
- Department of Otorhinolaryngology-Head and Neck Surgery, Yonsei University College of Medicine, Seoul, Republic of Korea
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Choi KH, Song JH, Kim YS, Kim JH, Jeong WJ, Nam IC, Kim JH, Ahn HK, Chun SH, Hong HJ, Joo YH, Eun YG, Moon SH, Lee JS. Recent Treatment Patterns of Oropharyngeal Cancer in Korea Based on the Expert Questionnaire Survey of the Korean Society for Head and Neck Oncology (KSHNO). Cancer Res Treat 2021; 53:1004-1014. [PMID: 33540495 PMCID: PMC8524018 DOI: 10.4143/crt.2020.973] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2020] [Accepted: 01/26/2021] [Indexed: 01/03/2023] Open
Abstract
Purpose The incidence of human papillomavirus (HPV)-related oropharyngeal cancer (OPC) has increased, and staging and optimal therapeutic approaches are challenging. A questionnaire survey was conducted to investigate the controversial treatment policy of stage T2 OPC according to the N category and determine the opinions of multidisciplinary experts in Korea. Materials and Methods Five OPC scenarios were developed by the Subcommittee on Oropharyngeal Treatment Guidelines of the Korean Society for Head and Neck Oncology and distributed to experts of multidisciplinary treatment hospitals. Results Sixty-five experts from 45 institutions responded. For the HPV-positive T2N0M0 scenario, 67.7% of respondents selected surgery followed by definitive concurrent chemoradiotherapy (CCRT) or radiotherapy alone. For the T2N1M0 HPV-positive scenario, there was a notable difference in the selection of primary treatment by expert specialty; 53.9% of respondents selected surgery and 39.8% selected definitive CCRT as the primary treatment. For the T2N3M0 advanced HPV-positive scenario, 50.0% of respondents selected CCRT and 33.3% considered induction chemotherapy (IC) as the primary treatment. CCRT and IC were significantly more frequently selected for the HPV-related OPC cases (p=0.010). The interdepartmental variability showed that the head and neck surgeons and medical oncologists favored surgery, whereas the radiation oncologists preferably selected definitive CCRT (p < 0.001). Conclusion In this study, surgery was preferred for lymph node-negative OPC, and as lymph node metastasis progressed, CCRT tended to be preferred, and IC was administered. Clinical practice patterns by stage and HPV status showed differences according to expert specialty. Multidisciplinary consensus guidelines will be essential in the future.
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Affiliation(s)
- Kye Hye Choi
- Department of Radiation Oncology, Seoul St. Mary’s Hospital, College of Medicine, The Catholic University of Korea, Seoul, Korea
| | - Jin Ho Song
- Department of Radiation Oncology, Seoul St. Mary’s Hospital, College of Medicine, The Catholic University of Korea, Seoul, Korea
| | - Yeon-Sil Kim
- Department of Radiation Oncology, Seoul St. Mary’s Hospital, College of Medicine, The Catholic University of Korea, Seoul, Korea
| | - Ji-Hoon Kim
- Department of Radiology, Seoul National University Hospital, Seoul National University College of Medicine, Seoul, Korea
| | - Woo-Jin Jeong
- Department of Otorhinolaryngology-Head and Neck Surgery, Seoul National University Bundang Hospital, Seoul National University College of Medicine, Seongnam, Korea
| | - Inn-Chul Nam
- Department of Otolaryngology-Head and Neck Surgery, Incheon St. Mary’s Hospital, College of Medicine, The Catholic University of Korea, Incheon, Korea
| | - Jin Ho Kim
- Department of Radiation Oncology, Seoul National University Hospital, Seoul National University College of Medicine, Seoul, Korea
| | - Hee Kyung Ahn
- Division of Medical Oncology, Department of Internal Medicine, Gachon University Gil Medical Center, Incheon, Korea
| | - Sang Hoon Chun
- Division of Medical Oncology, Department of Internal Medicine, Bucheon St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Bucheon, Korea
| | - Hyun Jun Hong
- Department of Otorhinolaryngology-Head and Neck Surgery, International St. Mary's Hospital, Catholic Kwandong University College of Medicine, Incheon, Korea
| | - Young-Hoon Joo
- Department of Otolaryngology-Head and Neck Surgery, Bucheon St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Bucheon, Korea
| | - Young-Gyu Eun
- Department of Otolaryngology-Head and Neck Surgery, Kyung Hee University School of Medicine, Seoul, Korea
| | - Sung Ho Moon
- Proton Therapy Center, Research Institute and Hospital, National Cancer Center, Goyang, Korea
| | - Jeong Shim Lee
- Department of Radiation Oncology, Inha University Hospital, Inha University of Medicine, Incheon, Korea
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Kim M, Yoon SY, Hong H, Hong HJ. Effects of Intratympanic Injection of Isosorbide on the Vestibular Function of Animal Models of Endolymphatic Hydrops. Clin Exp Otorhinolaryngol 2020; 14:367-373. [PMID: 33092316 PMCID: PMC8606285 DOI: 10.21053/ceo.2019.02040] [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: 12/16/2019] [Accepted: 10/01/2020] [Indexed: 02/08/2023] Open
Abstract
Objectives The aims of this study were to investigate the effects of intratympanic injections of isosorbide on vestibular function in animal models of endolymphatic hydrops and to find a new treatment option for the acute onset of vertigo in Ménière disease (MD). Methods Seventy male guinea pigs received intratympanic injection of isosorbide (IT-ISB). The animals were divided into three study groups: control, a chronic hydrops model, and an acute hydrops model. Intracochlear drug concentrations were measured using high-performance liquid chromatography. Vestibular function was analyzed using an animal rotator test with bidirectional sinusoidal harmonic acceleration before and after IT-ISB administration. Histological changes were also investigated. Results ISB successfully permeated the perilymph through the round window membrane (RWM) at all three concentrations (25%, 50%, and 100%). In the chronic hydrops model, while IT-ISB histologically induced a reduction of endolymphatic hydrops, vestibular function was unchanged. In the acute hydrops model, no endolymphatic hydrops was histologically observed, and vestibular symmetry was also preserved after IT-ISB. Conclusion ISB passed through the RWM into the perilymphatic space even at lower concentrations. IT-ISB histologically reduced hydrops in the chronic model and preserved symmetrical vestibular function in the acute model. IT-ISB could be a treatment candidate for acute attacks of vertigo in MD.
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Affiliation(s)
- Minbum Kim
- Department of Otorhinolaryngology-Head and Neck Surgery, Catholic Kwandong University College of Medicine, Incheon, Korea
| | - So Yeon Yoon
- Department of Otorhinolaryngology-Head and Neck Surgery, Catholic Kwandong University College of Medicine, Incheon, Korea
| | - Hansol Hong
- Department of Otorhinolaryngology, Yonsei University College of Medicine, Seoul, Korea
| | - Hyun Jun Hong
- Department of Otorhinolaryngology-Head and Neck Surgery, Catholic Kwandong University College of Medicine, Incheon, Korea
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Abstract
104 Background: The prognostic value of regulatory T cells (Tregs) in head and neck squamous cell carcinoma (HNSCC) remains unknown. We analyzed the prognostic effect of Tregs in HNSCC with immune activity scores, which reflect the activity status of the seven-step cancer-immunity cycle. Methods: We correlated the 23 immune activity scores and clinicopathologic features of The Cancer Genome Atlas (TCGA) HNSCC using multivariate Cox regression analyses and Kaplan-Meier survival curves. The processed data of immune activity scores were obtained from TIP online tool and the clinicopathologic data were downloaded from TCGA HNSCC database. Results: Immune activity scores of “trafficking of Tregs to tumors” was significantly associated with overall survival (OS) and progression-free survival (PFS). Low activity scores of “trafficking of Tregs to tumors” resulted in shorter OS and PFS. In multivariate analysis, low scores predicted poor OS (adjusted HR = 1.87, 95% CI 1.34-2.60 ; P < 0.001) and were related with unfavorable PFS (adjusted HR = 2.04, 95% CI 1.45-2.86 ; P < 0.001). Conclusions: Immune activity scores of “trafficking of Tregs to tumors” was independent significant prognostic factor in HNSCC. Therefore, assessment of immune activity scores may be useful tools for predicting prognosis in these patients.
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Affiliation(s)
- Hyun Chang
- Medical Oncology, International St Mary’s Hospital, Catholic Kwandong University, College of Medicine, Incheon, South Korea
| | - Hyun Jun Hong
- Otolaryngology–Head and Neck Surgery, International St Mary’s Hospital, Catholic Kwandong University, College of Medicine, Incheon, South Korea
| | - Yongho Kim
- Radiation Oncology, International St Mary’s Hospital, Catholic Kwandong University, College of Medicine, Incheon, South Korea
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Hong HJ, Jeong SH, Kim WS, Kim YJ. Safety of esophagogastroduodenoscopy-guided forceps biopsy and the feasibility of esophagogastroduodenoscopy for evaluation of hypopharyngeal cancer. BMC Surg 2019; 19:105. [PMID: 31395049 PMCID: PMC6686408 DOI: 10.1186/s12893-019-0571-z] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2019] [Accepted: 07/30/2019] [Indexed: 12/11/2022] Open
Abstract
Background There is currently no established standard tissue sampling method for hypopharyngeal cancer. The present study aimed to evaluate the feasibility of esophagogastroduodenoscopy (EGD) for the pretreatment evaluation of hypopharyngeal cancer and the safety of EGD-guided forceps biopsy. Methods We reviewed nine patients with hypopharyngeal cancer who underwent EGD for the evaluation of tumor extent and tissue biopsy from March 2014 to March 2017 at International St. Mary’s Hospital. One experienced endoscopist performed all the EGD procedures in the presence of a head and neck surgeon. The procedure included determining tumor location, extent (presence of pyriform sinus apex involvement), and size, and passing the endoscope through the upper esophageal sphincter. The success rate of tissue sampling was assessed, and procedure-related complications were recorded. Results All patients were male, with a mean age of 69.9 ± 10.9 years (range 61–69 years). Tissue sampling using biopsy forceps was performed in 6/9 patients (66.7%). No complications related to moderate sedation or biopsy, including post-biopsy bleeding or respiratory distress, were reported. Histologic confirmation was successful in 5/6 patients (83.3%). Upper gastrointestinal lesions were evaluated in 7/9 (77.8%) patients in whom the scope passed through the lesion. Conclusions EGD and EGD-guided forceps biopsy may be useful for the evaluation of hypopharyngeal cancer extent and tissue sampling, respectively. Electronic supplementary material The online version of this article (10.1186/s12893-019-0571-z) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Hyun Jun Hong
- Department of Otorhinolaryngology, International St. Mary's Hospital, Catholic Kwandong Universtiy College of Medicine, Incheon, South Korea
| | - Seok-Hoo Jeong
- Department of Gastroenterology, International St. Mary's Hospital, Catholic Kwandong Universtiy College of Medicine, Incheon, South Korea
| | - Won Shik Kim
- Division of Gastroenterology, Deparment of Internal Medicine, Kangnam Sacred-Heart Hospital, Hallym University Medical Center, Hallym University College of Medicine, Seoul, South Korea
| | - Yu Jin Kim
- Department of Gastroenterology, International St. Mary's Hospital, Catholic Kwandong Universtiy College of Medicine, Incheon, South Korea. .,Division of Gastroenterology, Department of Internal Medicine, Kangnam Sacred-Heart Hospital, Hallym University Medical Center, Hallym University College of Medicine, Chuncheon, South Korea. .,Yonsei University College of Medicine, 1, Singil-ro, Yeongdeungpo-gu, Seoul, Republic of Korea.
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Zhang W, Hong HJ, Chen YL. Establishment of a Gallbladder Cancer-Specific Survival Model to Predict Prognosis in Non-metastatic Gallbladder Cancer Patients After Surgical Resection. Dig Dis Sci 2018; 63:2251-2258. [PMID: 29736837 DOI: 10.1007/s10620-018-5103-7] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/17/2018] [Accepted: 04/25/2018] [Indexed: 12/16/2022]
Abstract
BACKGROUND Gallbladder cancer is an invasive cancer with a discouraging prognosis, and early detection and active intervention are of great value. AIMS To establish a more accurate and effective survival model to predict the prognosis of patients with non-metastatic gallbladder after surgical resection. METHODS A retrospective analysis was conducted in non-metastatic gallbladder cancer patients who were registered in the surveillance, epidemiology and end results database from 2010 to 2014. Univariate analysis and multivariate analysis were performed for the related factors that might affect the gallbladder cancer-specific survival. A prognostic gallbladder cancer-specific survival model was established using the nomogram tool. The discrimination test was measured by the c-index, and the conformance test was performed by a calibration curve. RESULTS In all, 1422 patients with non-metastatic gallbladder cancer were identified. The prognostic factors include age, gender, lymph node dissection, postoperative chemotherapy, tumor size, histological grading, pT stage and pN stage. The gallbladder cancer-specific survival model was established based on the prognostic factors. The model's c-index was 0.775, and the 7th AJCC staging c-index was 0.649. The calibration curves showed a good correlation between prediction and actual survival. CONCLUSIONS This study established the gallbladder cancer-specific survival model successfully. Compared with the 7th AJCC stage, this model refined the contribution of the pT stage, pN stage and other related factors and was demonstrated to be more accurate and reliable. More importantly, this model may allow clinicians to screen patients with a poor prognosis for closer follow-up or adjuvant treatment.
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Affiliation(s)
- Woods Zhang
- Department of Hepatobiliary Surgery and Fujian Institute of Hepatobiliary Surgery, Fujian Medical University Union Hospital, Fujian Medical University, Fuzhou, 350001, China
| | - H J Hong
- Department of Hepatobiliary Surgery and Fujian Institute of Hepatobiliary Surgery, Fujian Medical University Union Hospital, Fujian Medical University, Fuzhou, 350001, China
| | - Yan-Ling Chen
- Department of Hepatobiliary Surgery and Fujian Institute of Hepatobiliary Surgery, Fujian Medical University Union Hospital, Fujian Medical University, Fuzhou, 350001, China.
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Ahn SH, Hong HJ, Kwon SY, Kwon KH, Roh JL, Ryu J, Park JH, Baek SK, Lee GH, Lee SY, Lee JC, Chung MK, Joo YH, Ji YB, Hah JH, Kwon M, Park YM, Song CM, Shin SC, Ryu CH, Lee DY, Lee YC, Chang JW, Jeong HM, Cho JK, Cha W, Chun BJ, Choi IJ, Choi HG, Lee KD. Guidelines for the Surgical Management of Laryngeal Cancer: Korean Society of Thyroid-Head and Neck Surgery. Clin Exp Otorhinolaryngol 2017; 10:1-43. [PMID: 28043099 PMCID: PMC5327593 DOI: 10.21053/ceo.2016.01389] [Citation(s) in RCA: 39] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2016] [Accepted: 10/24/2016] [Indexed: 01/08/2023] Open
Abstract
Korean Society of Thyroid-Head and Neck Surgery appointed a Task Force to develop clinical practice guidelines for the surgical treatment of laryngeal cancer. This Task Force conducted a systematic search of the EMBASE, MEDLINE, Cochrane Library, and KoreaMed databases to identify relevant articles, using search terms selected according to the key questions. Evidence-based recommendations were then created on the basis of these articles. An external expert review and Delphi questionnaire were applied to reach consensus regarding the recommendations. The resulting guidelines focus on the surgical treatment of laryngeal cancer with the assumption that surgery is the selected treatment modality after a multidisciplinary discussion in any context. These guidelines do not, therefore, address non-surgical treatment such as radiation therapy or chemotherapy. The committee developed 62 evidence-based recommendations in 32 categories intended to assist clinicians during management of patients with laryngeal cancer and patients with laryngeal cancer, and counselors and health policy-makers.
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Affiliation(s)
- Korean Society of Thyroid-Head and Neck Surgery Guideline Task Force
- Department of Otorhinolaryngology Head and Neck Surgery, Seoul National University College of Medicine, Seoul, Korea
- Department of Otorhinolaryngology Head and Neck Surgery, Catholic Kwandong University College of Medicine, Incheon, Korea
- Department of Otorhinolaryngology Head and Neck Surgery, Korea University College of Medicine, Seoul, Korea
- Department of Otorhinolaryngology Head and Neck Surgery, Hallym University College of Medicine, Seoul, Korea
- Department of Otorhinolaryngology Head and Neck Surgery, University of Ulsan College of Medicine, Seoul, Korea
- Department of Otorhinolaryngology Head and Neck Surgery, National Cancer Center, Goyang, Korea
- Department of Otorhinolaryngology Head and Neck Surgery, Chosun University College of Medicine, Gwangju, Korea
- Department of Otorhinolaryngology Head and Neck Surgery, Korea Cancer Center Hospital, Seoul, Korea
- Department of Otorhinolaryngology Head and Neck Surgery, Chung-Ang University College of Medicine, Seoul, Korea
- Department of Otorhinolaryngology Head and Neck Surgery, Pusan National University School of Medicine, Busan, Korea
- Department of Otorhinolaryngology Head and Neck Surgery, Sungkyunkwan University School of Medicine, Seoul, Korea
- Department of Otorhinolaryngology Head and Neck Surgery, College of Medicine, The Catholic University of Korea, Seoul, Korea
- Department of Otorhinolaryngology Head and Neck Surgery, Hanyang University College of Medicine, Seoul, Korea
- Department of Otorhinolaryngology Head and Neck Surgery, Gyeongsang National University School of Medicine, Jinju, Korea
- Department of Otorhinolaryngology Head and Neck Surgery, Daejin Medical Center, Bundang Jesaeng Hospital, Seongnam, Korea
- Department of Otorhinolaryngology Head and Neck Surgery, Kyung Hee University School of Medicine, Seoul, Korea
- Department of Otorhinolaryngology Head and Neck Surgery, Chungnam National University School of Medicine, Daejeon, Korea
- Department of Otorhinolaryngology Head and Neck Surgery, Wonkwang University School of Medicine, Iksan, Korea
- Department of Otorhinolaryngology Head and Neck Surgery, Inje University College of Medicine, Busan, Korea
- Department of Otorhinolaryngology Head and Neck Surgery, Seonam University College of Medicine, Goyang, Korea
- Department of Otorhinolaryngology Head and Neck Surgery, Kosin University College of Medicine, Busan, Korea
| | - Soon-Hyun Ahn
- Department of Otorhinolaryngology Head and Neck Surgery, Seoul National University College of Medicine, Seoul, Korea
| | - Hyun Jun Hong
- Department of Otorhinolaryngology Head and Neck Surgery, Catholic Kwandong University College of Medicine, Incheon, Korea
| | - Soon Young Kwon
- Department of Otorhinolaryngology Head and Neck Surgery, Korea University College of Medicine, Seoul, Korea
| | - Kee Hwan Kwon
- Department of Otorhinolaryngology Head and Neck Surgery, Hallym University College of Medicine, Seoul, Korea
| | - Jong-Lyel Roh
- Department of Otorhinolaryngology Head and Neck Surgery, University of Ulsan College of Medicine, Seoul, Korea
| | - Junsun Ryu
- Department of Otorhinolaryngology Head and Neck Surgery, National Cancer Center, Goyang, Korea
| | - Jun Hee Park
- Department of Otorhinolaryngology Head and Neck Surgery, Chosun University College of Medicine, Gwangju, Korea
| | - Seung-Kuk Baek
- Department of Otorhinolaryngology Head and Neck Surgery, Korea University College of Medicine, Seoul, Korea
| | - Guk Haeng Lee
- Department of Otorhinolaryngology Head and Neck Surgery, Korea Cancer Center Hospital, Seoul, Korea
| | - Sei Young Lee
- Department of Otorhinolaryngology Head and Neck Surgery, Chung-Ang University College of Medicine, Seoul, Korea
| | - Jin Choon Lee
- Department of Otorhinolaryngology Head and Neck Surgery, Pusan National University School of Medicine, Busan, Korea
| | - Man Ki Chung
- Department of Otorhinolaryngology Head and Neck Surgery, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - Young Hoon Joo
- Department of Otorhinolaryngology Head and Neck Surgery, College of Medicine, The Catholic University of Korea, Seoul, Korea
| | - Yong Bae Ji
- Department of Otorhinolaryngology Head and Neck Surgery, Hanyang University College of Medicine, Seoul, Korea
| | - Jeong Hun Hah
- Department of Otorhinolaryngology Head and Neck Surgery, Seoul National University College of Medicine, Seoul, Korea
| | - Minsu Kwon
- Department of Otorhinolaryngology Head and Neck Surgery, Gyeongsang National University School of Medicine, Jinju, Korea
| | - Young Min Park
- Department of Otorhinolaryngology Head and Neck Surgery, Daejin Medical Center, Bundang Jesaeng Hospital, Seongnam, Korea
| | - Chang Myeon Song
- Department of Otorhinolaryngology Head and Neck Surgery, Hanyang University College of Medicine, Seoul, Korea
| | - Sung-Chan Shin
- Department of Otorhinolaryngology Head and Neck Surgery, Pusan National University School of Medicine, Busan, Korea
| | - Chang Hwan Ryu
- Department of Otorhinolaryngology Head and Neck Surgery, National Cancer Center, Goyang, Korea
| | - Doh Young Lee
- Department of Otorhinolaryngology Head and Neck Surgery, Korea University College of Medicine, Seoul, Korea
| | - Young Chan Lee
- Department of Otorhinolaryngology Head and Neck Surgery, Kyung Hee University School of Medicine, Seoul, Korea
| | - Jae Won Chang
- Department of Otorhinolaryngology Head and Neck Surgery, Chungnam National University School of Medicine, Daejeon, Korea
| | - Ha Min Jeong
- Department of Otorhinolaryngology Head and Neck Surgery, Wonkwang University School of Medicine, Iksan, Korea
| | - Jae-Keun Cho
- Department of Otorhinolaryngology Head and Neck Surgery, Inje University College of Medicine, Busan, Korea
| | - Wonjae Cha
- Department of Otorhinolaryngology Head and Neck Surgery, Pusan National University School of Medicine, Busan, Korea
| | - Byung Joon Chun
- Department of Otorhinolaryngology Head and Neck Surgery, Seonam University College of Medicine, Goyang, Korea
| | - Ik Joon Choi
- Department of Otorhinolaryngology Head and Neck Surgery, Korea Cancer Center Hospital, Seoul, Korea
| | - Hyo Geun Choi
- Department of Otorhinolaryngology Head and Neck Surgery, Hallym University College of Medicine, Seoul, Korea
| | - Kang Dae Lee
- Department of Otorhinolaryngology Head and Neck Surgery, Kosin University College of Medicine, Busan, Korea
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Abstract
Objective To investigate the treatment outcomes of parotid gland cancer at a single center over a 10-year period and to evaluate the prognostic significance of maximum standardized uptake value. Study Design Retrospective case series with chart review. Setting Academic care center. Subjects and Methods Ninety-eight patients with primary parotid gland cancer who were surgically treated at Yonsei University Head & Neck Cancer Clinic between January 1999 and December 2008 were analyzed. Patient data were collected retrospectively from medical charts. The investigators analyzed the association of clinicopathological factors and maximum standardized uptake value on 18F-fluorodeoxyglucose positron emission tomography–computed tomography scan with disease-specific survival. Results Mean patient age was 49.7 years. Mean follow-up was 48.8 months. Thirty-three, 40, 30, and 23 patients had stage I, II, III, and IVA disease, respectively. Mucoepidermoid carcinoma was the most common histologic type (34.7%), followed by acinic cell carcinoma (27.6%). Eighteen patients (18.4%) experienced recurrences (mean recurrence gap, 20.6 months; range, 2-87 months). Five- and 10-year disease-specific survival rates were 93.6% and 81.8%, respectively. In the univariate analysis, pathologic T stage, pathologic lymph node status, resection margin, external parenchymal extension, and maximum standardized uptake value were significantly associated with disease-specific survival. Pathologic lymph node status and maximum standardized uptake value were independent prognostic factors in the multivariate analysis. Conclusion Our single-center experience with parotid gland cancer treatment is consistent with the literature. Cervical lymph node metastasis and high maximum standardized uptake value are associated with poor survival in parotid gland cancer.
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Affiliation(s)
- Jae Won Chang
- Department of Otolaryngology–Head and Neck Surgery, Cancer Research Institute, Research Institute for Medical Sciences, Chungnam National University College of Medicine, Daejeon, Republic of Korea
| | - Hyun Jun Hong
- Department of Otolaryngology, International St Mary’s Hospital, Incheon, Republic of Korea
| | - Myung Jin Ban
- Department of Otorhinolaryngology, Yonsei University College of Medicine, Seoul, Republic of Korea
| | - Yoo Seob Shin
- Department of Otolaryngology, Ajou University School of Medicine, Suwon, Republic of Korea
| | - Won Shik Kim
- Department of Otorhinolaryngology, Yonsei University College of Medicine, Seoul, Republic of Korea
| | - Yoon Woo Koh
- Department of Otorhinolaryngology, Yonsei University College of Medicine, Seoul, Republic of Korea
| | - Eun Chang Choi
- Department of Otorhinolaryngology, Yonsei University College of Medicine, Seoul, Republic of Korea
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Jeong K, Choo YS, Hong HJ, Yoon YS, Song MH. Tetrafluoroethane (R134a) hydrate formation within variable volume reactor accompanied by evaporation and condensation. Rev Sci Instrum 2015; 86:035102. [PMID: 25832270 DOI: 10.1063/1.4913650] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Vast size hydrate formation reactors with fast conversion rate are required for the economic implementation of seawater desalination utilizing gas hydrate technology. The commercial target production rate is order of thousand tons of potable water per day per train. Various heat and mass transfer enhancement schemes including agitation, spraying, and bubbling have been examined to maximize the production capacities in scaled up design of hydrate formation reactors. The present experimental study focused on acquiring basic knowledge needed to design variable volume reactors to produce tetrafluoroethane hydrate slurry. Test vessel was composed of main cavity with fixed volume of 140 ml and auxiliary cavity with variable volume of 0 ∼ 64 ml. Temperatures at multiple locations within vessel and pressure were monitored while visual access was made through front window. Alternating evaporation and condensation induced by cyclic volume change provided agitation due to density differences among water and vapor, liquid and hydrate R134a as well as extended interface area, which improved hydrate formation kinetics coupled with latent heat release and absorption. Influences of coolant temperature, piston stroke/speed, and volume change period on hydrate formation kinetics were investigated. Suggestions of reactor design improvement for future experimental study are also made.
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Affiliation(s)
- K Jeong
- Department of Mechanical, Robotics, and Energy Engineering, Dongguk University, Seoul 100-715, South Korea
| | - Y S Choo
- Department of Mechanical, Robotics, and Energy Engineering, Dongguk University, Seoul 100-715, South Korea
| | - H J Hong
- Department of Mechanical, Robotics, and Energy Engineering, Dongguk University, Seoul 100-715, South Korea
| | - Y S Yoon
- Department of Mechanical, Robotics, and Energy Engineering, Dongguk University, Seoul 100-715, South Korea
| | - M H Song
- Department of Mechanical, Robotics, and Energy Engineering, Dongguk University, Seoul 100-715, South Korea
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Park YM, Jo KH, Hong HJ, Choi HS. Phonatory outcome of 585nm/pulsed-dye laser in the management of glottic leukoplakia. Auris Nasus Larynx 2014; 41:459-63. [DOI: 10.1016/j.anl.2014.05.013] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2013] [Revised: 05/04/2014] [Accepted: 05/13/2014] [Indexed: 10/25/2022]
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Park HS, Bae YS, Yoon SO, Lim BJ, Hong HJ, Ro JY, Hong SW. Usefulness of Nuclear Protein in Testis (NUT) Immunohistochemistry in the Cytodiagnosis of NUT Midline Carcinoma: A Brief Case Report. Korean J Pathol 2014; 48:335-8. [PMID: 25214871 PMCID: PMC4160602 DOI: 10.4132/koreanjpathol.2014.48.4.335] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/22/2014] [Revised: 04/09/2014] [Accepted: 04/11/2014] [Indexed: 11/23/2022]
Affiliation(s)
- Heae Surng Park
- Department of Pathology, Gangnam Severance Hospital, Yonsei University College of Medicine, Seoul, Korea
| | - Yoon Sung Bae
- Department of Pathology, Gangnam Severance Hospital, Yonsei University College of Medicine, Seoul, Korea
| | - Sun Och Yoon
- Department of Pathology, Gangnam Severance Hospital, Yonsei University College of Medicine, Seoul, Korea
| | - Beom Jin Lim
- Department of Pathology, Gangnam Severance Hospital, Yonsei University College of Medicine, Seoul, Korea
| | - Hyun Jun Hong
- Department of Otolargnology, Gangnam Severance Hospital, Yonsei University College of Medicine, Seoul, Korea
| | - Jae Y Ro
- Department of Pathology, The Methodist Hospital and Weill Medical College of Cornell University, Houston, TX, USA
| | - Soon Won Hong
- Department of Pathology, Gangnam Severance Hospital, Yonsei University College of Medicine, Seoul, Korea
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Lee HS, Kim D, Lee SY, Byeon HK, Kim WS, Hong HJ, Koh YW, Choi EC. Robot-assisted versus endoscopic submandibular gland resection via retroauricular approach: a prospective nonrandomized study. Br J Oral Maxillofac Surg 2014; 52:179-84. [DOI: 10.1016/j.bjoms.2013.11.002] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2013] [Accepted: 11/02/2013] [Indexed: 01/04/2023]
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Min SI, Ha J, Kang HG, Ahn S, Park T, Park DD, Kim SM, Hong HJ, Min SK, Ha IS, Kim SJ. Conversion of twice-daily tacrolimus to once-daily tacrolimus formulation in stable pediatric kidney transplant recipients: pharmacokinetics and efficacy. Am J Transplant 2013; 13:2191-7. [PMID: 23734831 DOI: 10.1111/ajt.12274] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [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: 01/30/2013] [Revised: 03/29/2013] [Accepted: 03/31/2013] [Indexed: 01/25/2023]
Abstract
The pharmacokinetics, efficacy and safety of once-daily tacrolimus formulation (Tac-OD) were assessed in 34 stable pediatric kidney transplant recipients. Enrolled patients received their dose of twice-daily tacrolimus formulation (Tac-BID) on study Days 0 through 7. On the morning of study Day 8, the total daily doses for patients were converted to Tac-OD on a 1:1 basis and maintained on a once-daily morning dosing regimen. Tacrolimus pharmacokinetic profiles were obtained on study Days 7, 14 and 28 (after dose adjustment). Although the mean C0 concentrations (4.10 ± 1.16-3.53 ± 1.10 ng/mL, p = 0.004), and AUC0-24 (151.8 ± 41.6-129.8 ± 39.3 ng h/mL, p < 0.001) were decreased significantly after a 1:1 based conversion, there was high interindividual variability. The dose of Tac-OD was decreased in 26.5% and increased in 44.1% of patients. The resultant tacrolimus dose and pharmacokinetic profiles on study Day 28 were comparable to those on Day 7. There were no serious adverse events. In conclusion, Tac-BID can be safely converted to Tac-OD in stable pediatric kidney transplant patients with the heightened therapeutic drug monitoring. Effects of drug conversion on the cardiovascular risk factors, neurological side effects and adherence should be further evaluated.
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Affiliation(s)
- S I Min
- Department of Surgery, Seoul National University College of Medicine, Seoul, Korea
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Ki MK, Jeoung MH, Choi JR, Rho SS, Kwon YG, Shim H, Chung J, Hong HJ, Song BD, Lee S. Human antibodies targeting the C-type lectin-like domain of the tumor endothelial cell marker clec14a regulate angiogenic properties in vitro. Oncogene 2013; 32:5449-57. [PMID: 23644659 PMCID: PMC3898107 DOI: 10.1038/onc.2013.156] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2012] [Revised: 03/14/2013] [Accepted: 03/18/2013] [Indexed: 12/15/2022]
Abstract
It has been suggested that clec14a may be involved in tumor angiogenesis. However, a molecular mechanism has not been clearly identified. In this study, we show for the first time that C-type lectin-like domain (CTLD) of clec14a may be important for regulating cell migration and filopodia formation. Using phage display technology, recombinant human antibodies specific to the CTLDs of human and mouse clec14a (clec14a-CTLD (immunoglobulin G) IgG) were selected. Functional assays using the antibodies showed that clec14a-CTLD IgGs specifically blocked endothelial cell migration and tube formation without affecting cell viability or activation. Further, clec14a-CTLD IgGs inhibited clec14a-mediated cell–cell contact by blocking interaction between CTLDs. Finally, clec14a cross-linking by the clec14a-CTLD IgGs significantly downregulated clec14a expression on the surface of endothelial cells. These results strongly suggest that the clec14a-CTLD may be a key domain in angiogenesis, and that clec14a-CTLD IgGs specifically inhibit angiogenesis by modulating CTLD-mediated cell interactions and clec14a expression on the surface of endothelial cells.
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Affiliation(s)
- M K Ki
- Laboratory of Molecular Cancer Therapeutics, Scripps Korea Antibody Institute, Chuncheon, Korea
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Byeon HK, Kim JW, Kim ES, Chung HJ, Lee EJ, Hong HJ, Kim WS, Koh YW, Choi EC. OP185. Oral Oncol 2013. [DOI: 10.1016/j.oraloncology.2013.03.193] [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 SY, Shin HA, Park YH, Hong HJ, Koh YW, Choi EC. PP014. Oral Oncol 2013. [DOI: 10.1016/j.oraloncology.2013.03.257] [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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Byeon HK, Duvvuri U, Kim WS, Park YM, Hong HJ, Koh YW, Choi EC. OP193. Oral Oncol 2013. [DOI: 10.1016/j.oraloncology.2013.03.201] [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
Objective The pulsed dye laser (PDL) has been shown to be effective in the treatment of hypertrophic scars and keloids in dermatology. On the basis of histopathologic similarities between sulcus vocalis and scar tissue and numerous reports on the treatment of laryngeal lesions, especially scar tissue, with PDL, we evaluated the efficacy of treating sulcus vocalis with PDL. We named this surgical procedure PDL glottoplasty. Study Design Case series with planned data collection. Setting A university-based, tertiary care medical center. Subjects and Methods This study was conducted on 25 patients diagnosed with sulcus vocalis by videostroboscopy at the Gangnam Severance Hospital Otorhinolaryngology Department between August 2006 and February 2012. Energy delivery was fixed at 0.75 Joules (J) per pulse, and each vocal fold was administered 60 to 110 pulses (average 72.5 pulses) during each procedure. Aerodynamic, stroboscopic, and acoustic voice analyses were performed pre- and postoperatively. Results Although assessment was necessarily subjective, our study indicated that vocal folds showed decreased stiffness and improved mucosal wave properties after treatment, resulting in improved vibration and dysphonia. In the objective assessments, most patients who underwent PDL glottoplasty showed improvement in several postoperative voice analysis indices. The differences between preoperative and some postoperative voice parameter indices were statistically significant. Conclusion We found PDL glottoplasty to be beneficial in the treatment of sulcus vocalis. Objective measurements of voice quality and normalization of vocal fold vibration improved after PDL treatment in most cases. Our results warrant further studies with larger numbers of participants and longer follow-up periods.
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Affiliation(s)
- Chi Sang Hwang
- Department of Otorhinolaryngology, Yonsei University College of Medicine, Seoul, Korea
| | - Hyun Jin Lee
- Department of Otorhinolaryngology, Yonsei University College of Medicine, Seoul, Korea
| | - Jong Gyun Ha
- Department of Otorhinolaryngology, Yonsei University College of Medicine, Seoul, Korea
| | - Chang Il Cho
- Department of Otorhinolaryngology, Yonsei University College of Medicine, Seoul, Korea
| | - Na Hyun Kim
- Department of Otorhinolaryngology, Yonsei University College of Medicine, Seoul, Korea
| | - Hyun Jun Hong
- Department of Otorhinolaryngology, Yonsei University College of Medicine, Seoul, Korea
| | - Hong-Shik Choi
- Department of Otorhinolaryngology, Yonsei University College of Medicine, Seoul, Korea
- Institute of Logopedics & Phoniatrics, Yonsei University College of Medicine, Gangnam Severance Hospital, Seoul, Korea
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Hong HJ, Lee JS, Choi JW, Min BH, Lee HB, Kim CH. Transplantation of Autologous Chondrocytes Seeded on a Fibrin/Hyaluronan Composite Gel Into Tracheal Cartilage Defects in Rabbits: Preliminary Results. Artif Organs 2012; 36:998-1006. [DOI: 10.1111/j.1525-1594.2012.01486.x] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Lee HS, Kim WS, Hong HJ, Ban MJ, Lee D, Koh YW, Choi EC. Robot-assisted Supraomohyoid Neck Dissection via a Modified Face-lift or Retroauricular Approach in Early-stage cN0 Squamous Cell Carcinoma of the Oral Cavity: A Comparative Study with Conventional Technique. Ann Surg Oncol 2012; 19:3871-8. [DOI: 10.1245/s10434-012-2423-2] [Citation(s) in RCA: 82] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2012] [Indexed: 11/18/2022]
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Shin YS, Koh YW, Kim SH, Jeong JH, Ahn S, Hong HJ, Choi EC. Radiotherapy Deteriorates Postoperative Functional Outcome After Partial Glossectomy With Free Flap Reconstruction. J Oral Maxillofac Surg 2012; 70:216-20. [DOI: 10.1016/j.joms.2011.04.014] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2011] [Accepted: 04/11/2011] [Indexed: 10/17/2022]
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Shin YS, Hong HJ, Koh YW, Chung WY, Lee HY, Hong JM, Hwang CS, Chang JW, Choi EC. Gasless transaxillary robot-assisted neck dissection: a preclinical feasibility study in four cadavers. Yonsei Med J 2012; 53:193-7. [PMID: 22187252 PMCID: PMC3250340 DOI: 10.3349/ymj.2012.53.1.193] [Citation(s) in RCA: 15] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/27/2022] Open
Abstract
PURPOSE We hypothesized that comprehensive neck dissection could be achieved via a gasless transaxillary approach using a robotic system. We intended to evaluate the accessibility of level I, IIB and VA nodes with transaxillary robot-assisted neck dissection of four cadavers. MATERIALS AND METHODS Transaxillary robotic neck dissection was performed in four cadavers through a 7-cm longitudinal incision at the anterior axilla and a 0.8-cm-sized incision in the chest wall. RESULTS We successfully performed neck dissection from level II to V in all four cadavers. However, dissection of levels IIB and VA, which lie on the cephalic portion of the spinal accessory nerve, was difficult. Vital structures, including the internal jugular vein, carotid artery, vagus nerve, phrenic nerve, superior thyroid artery and hypoglossal nerve, were successfully identified and preserved. CONCLUSION Our results demonstrate the feasibility of robot-assisted neck dissection using a transaxillary approach. We suggest that gasless, transaxillary robotic neck dissection is a promising technique for treating nodal metastasis in thyroid cancers or in selected squamous cell carcinomas of the head and neck. However, some modification of the approach might be needed when performing comprehensive neck dissections of all levels of the neck.
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Affiliation(s)
- Yoo Seob Shin
- Department of Otolaryngology, School of Medicine, Ajou University, Suwon, Korea
| | - Hyun Jun Hong
- Department of Otorhinolaryngology, Yonsei University College of Medicine, Seoul, Korea
| | - Yoon Woo Koh
- Department of Otorhinolaryngology, Yonsei University College of Medicine, Seoul, Korea
| | - Woong Youn Chung
- Department of General Surgery, Yonsei University College of Medicine, Seoul, Korea
| | - Hye Yeon Lee
- Department of Anatomy, Yonsei University College of Medicine, Seoul, Korea
| | - Jae Min Hong
- Department of Otorhinolaryngology, Yonsei University College of Medicine, Seoul, Korea
| | - Chi Sang Hwang
- Department of Otorhinolaryngology, Yonsei University College of Medicine, Seoul, Korea
| | - Jae Won Chang
- Department of Otorhinolaryngology, Yonsei University College of Medicine, Seoul, Korea
| | - Eun Chang Choi
- Department of Otorhinolaryngology, Yonsei University College of Medicine, Seoul, Korea
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Koh YW, Chung WY, Hong HJ, Lee SY, Kim WS, Lee HS, Choi EC. Robot-Assisted Selective Neck Dissection via Modified Face-lift Approach for Early Oral Tongue Cancer: A Video Demonstration. Ann Surg Oncol 2011; 19:1334-5. [DOI: 10.1245/s10434-011-2155-8] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2011] [Indexed: 11/18/2022]
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Kim WS, Lee HS, Kang SM, Hong HJ, Koh YW, Lee HY, Choi HS, Choi EC. Feasibility of Robot-Assisted Neck Dissections via a Transaxillary and Retroauricular (“TARA”) Approach in Head and Neck Cancer: Preliminary Results. Ann Surg Oncol 2011; 19:1009-17. [DOI: 10.1245/s10434-011-2116-2] [Citation(s) in RCA: 60] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2011] [Indexed: 12/15/2022]
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Hong HJ, Kim YD, Cha MJ, Kim J, Lee DH, Lee HS, Nam CM, Nam HS, Heo JH. Early neurological outcomes according to CHADS2 score in stroke patients with non-valvular atrial fibrillation. Eur J Neurol 2011; 19:284-90. [PMID: 21914056 DOI: 10.1111/j.1468-1331.2011.03518.x] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
BACKGROUND AND PURPOSE A higher CHADS(2) score or CHA(2)DS(2)-VASc score is associated with an increased risk of ischaemic stroke in patients with non-valvular atrial fibrillation (NVAF). However, there are no data regarding early neurological outcomes after stroke according to the risk levels. METHODS In this study, a total of 649 stroke patients with NVAF were enrolled and categorized into three groups: low-risk (CHADS(2) score of 0-1), moderate-risk (CHADS(2) score 2-3), or high-risk group (CHADS(2) score ≥4). CHA(2)DS(2)-VASc score was divided into four groups including 0-1, 2-3, 4-5, and ≥6. We investigated whether there were differences in initial stroke severity, early neurological outcome, and infarct size according to CHADS(2) score or CHA(2)DS(2)-VASc score in stroke patients with NVAF. RESULTS The initial National Institutes of Health Stroke Scale (NIHSS) score was highest in high-risk group [9.5, interquartile range (IQR) 4-18], followed by moderate-risk (8, IQR 2-17) and low-risk group (6, IQR 2-15) (P=0.012). Likewise, initial stroke severity increased in a positive fashion with increasing the CHA(2)DS(2)-VASc score. During hospitalization, those in the high-risk group or higher CHA(2)DS(2)-VASc score had less improvement in their NIHSS score. Furthermore, early neurological deterioration (END) developed more frequently as CHADS(2) score or CHA(2)DS(2)-VASc score increased. Multivariate analysis showed being in the high-risk group was independently associated with END (OR 2.129, 95% CI 1.013-4.477). CONCLUSIONS Our data indicate that patients with NVAF and higher CHADS(2) score or CHA(2)DS(2)-VASc score are more likely to develop severe stroke and a worse clinical course is expected in these patients after stroke presentation.
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Affiliation(s)
- H J Hong
- Department ofNeurology, Yonsei University College of Medicine, Seoul, South Korea
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Lee SY, Koh YW, Kim BG, Hong HJ, Jeong JH, Choi EC. The Extended Indication of Parotidectomy Using the Modified Facelift Incision in Benign Lesions: Retrospective Analysis of a Single Institution. World J Surg 2011; 35:2228-37. [DOI: 10.1007/s00268-011-1209-1] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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Shin YS, Kim WS, Lee HS, Hong HJ, Kim SH, Koh YW, Choi EC. Radiation Deteriorates Functional Outcome after Glossectomy. Otolaryngol Head Neck Surg 2011. [DOI: 10.1177/0194599811415823a142] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Objective: Quality of life could be deteriorated by surgical treatment of tongue cancer. Adjuvant therapy may also affect the functional outcome. Therefore, we intend to evaluate the influence of radiotherapy on the postoperative functional outcome after partial glossectomy with free flap reconstruction in early tongue cancer patients. Method: We measured the functional outcome and reviewed the charts of 31 oral tongue cancer patients. We evaluated speech integrity with Diadochokinetic test (DDK). Mobility of tongue was checked with measurement of upward, protrusion, and lateral deviation distance. We also evaluated swallowing capacity with the M.D. Anderson Dysphagia Inventory. Results: DDK rates of the surgery-only group and the postoperative radiotherapy group were 27.8 and 23.9, respectively, which was statistically different. Swallowing capacity was significantly superior in the surgery only group. Tongue mobility was not statistically different between the groups. Conclusion: The functional outcome regarding speech and swallowing is negatively influenced by postoperative radiotherapy.
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Hong HJ, Kim WS, Koh YW, Lee SY, Shin YS, Koo YC, Park YA, Choi EC. Endoscopic thyroidectomy via an axillo-breast approach without gas insufflation for benign thyroid nodules and micropapillary carcinomas: preliminary results. Yonsei Med J 2011; 52:643-54. [PMID: 21623608 PMCID: PMC3104441 DOI: 10.3349/ymj.2011.52.4.643] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/27/2022] Open
Abstract
PURPOSE To examine the feasibility of endoscopic thyroidectomy (ET) via an axillo- breast approach without gas insufflation for large thyroid tumors and micropapillary carcinomas. MATERIALS AND METHODS The patients in the benign group were separated into groups 1 (n=95, <4 cm in tumor diameter) and 2 (n=37, ≥4 cm in tumor diameter). Also, 57 patients in the micropapillary carcinoma group underwent an endoscopic hemithyroidectomy (HT) (group 3) and were compared with 60 patients who received conventional open HT (group 4). Postoperative functional outcome, local complications, surgical outcomes, and pathological outcomes were compared between the groups. RESULTS In the benign group, there was no significant difference in mean operating time, hospital stay, or overall perioperative complications between the two groups. In the micropapillary carcinoma group, mean operating time and hospital stay in group 3 were significantly longer than in group 4 (p=0.015 and p≤0.001). The overall perioperative complications did not differ significantly between the groups. The postoperative cosmetic result was better in groups 1-3 (endo group) than in group 4 (open group). CONCLUSION ET via a gasless axillo-breast approach seems to be a safe procedure even for benign thyroid lesions ≥4 cm and micropapillary carcinomas. Although it has the advantage of better cosmetic results over open thyroidectomy, there is room for improvement in terms of lessening its invasiveness and shortening the operative time.
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Affiliation(s)
- Hyun Jun Hong
- Department of Otorhinolaryngology, Yonsei University College of Medicine, Seoul, Korea
| | - Won Shik Kim
- Department of Otorhinolaryngology, Yonsei University College of Medicine, Seoul, Korea
| | - Yoon Woo Koh
- Department of Otorhinolaryngology, Yonsei University College of Medicine, Seoul, Korea
| | - So Yoon Lee
- Department of Otorhinolaryngology, Yonsei University College of Medicine, Seoul, Korea
| | - Yoo Seob Shin
- Department of Otorhinolaryngology, Yonsei University College of Medicine, Seoul, Korea
| | - Yong Cheol Koo
- Department of Otorhinolaryngology, Yonsei University College of Medicine, Seoul, Korea
| | - Yoon A Park
- Department of Otorhinolaryngology, Yonsei University College of Medicine, Seoul, Korea
| | - Eun Chang Choi
- Department of Otorhinolaryngology, Yonsei University College of Medicine, Seoul, Korea
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Shin YS, Kim SH, Koh YW, Hong HJ, Seol JH, Choi EC. Necessity of level IV dissection in cN0 hypopharyngeal carcinoma. Acta Otolaryngol 2011; 131:665-9. [PMID: 21395474 DOI: 10.3109/00016489.2011.554437] [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: 11/13/2022]
Abstract
CONCLUSIONS We suggest that contralateral level IV dissection is not necessary in patients with cN0 hypopharyngeal squamous cell carcinoma (HPSCC). OBJECTIVES Elective treatment of neck nodes is very important in the management of cN0 HPSCC. A selective neck dissection neck level II to IV (SND II-IV) is widely accepted as an elective neck treatment of cN0 HPSCC. However, there has been a lot of effort to reduce the extent of surgery. Therefore, we investigated the incidence of level IV metastasis and regional recurrence in cN0 HPSCC. METHODS We performed a retrospective review of 40 patients who underwent SND II-IV as an elective treatment for cN0 HPSCC from 1992 to 2010. RESULTS In all, 30 bilateral and 10 unilateral SND II-IVs were performed in 40 patients. Of the 70 SND II-IV specimens, 15 specimens from 14 patients (21%) were revealed to have positive lymph node metastasis. Level IV was involved in 3 of 70 necks (4.2%), but no isolated or contralateral level IV metastasis was observed. Every case that had level IV metastasis also had positive nodes in level II or III. There was no case of postoperative chylous leakage and only one case of phrenic nerve palsy.
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Affiliation(s)
- Yoo Seob Shin
- Department of Otorhinolaryngology, Yonsei University College of Medicine, Seoul, Republic of Korea
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Kim CH, Lee BS, Kang SU, Hwang HS, Sung ES, Kim YS, Koh YW, Hong HJ, Ryu MR, Kim JW. Abstract 4772: A novel agonist antibody to human death receptor 4, AY4, induces apoptotic cell death in head and neck cancer through ROS generation: in vitro and in vivo. Cancer Res 2011. [DOI: 10.1158/1538-7445.am2011-4772] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Abstract
Background : The proapoptotic tumor necrosis factor-related apoptosis inducing ligand (TRAIL) receptors death receptor (DR) 4 and DR5 are attractive targets to develop the receptorspecific agonistic monoclonal antibodies (mAb) as anticancer agents because of their tumor-selective cell death-inducing activity. Here, we describe the characterization of a novel agonistic mAb (AY4) against human DR4 and apoptosis through reactive oxygen species (ROS) production in head and neck cancer model.
Methods : The effects of AY4 in head and neck cell lines (KB, SNU899, HN9, FaDu) was studied on apoptosis using MTT assy, TUNEL, Annexin V assay and western blotting and was examed on the production of reactive oxygen species with DCFDA staining, intracellular signaling and animal model. In addition, we analyzed the anticancer effect of AY4 in nude mice xenograft model. In addition, drug toxicity (embryotoxicity and neurotoxicity) of AY4 were investigated in vivo zebrafish model.
Results: The DR4 was expressed in head and neck cancer cell lines by Flow cytometry (FACS) and western blotting. AY4 inhibited cell growth in KB and HN9 excluding SNU899 and FaDu and caused cell death via caspase-dependent apoptosis. The apoptotic cell death by AY4 decreased by N-acetylcysteine (NAC), an antioxidant, suggesting ROS generation involved in the cell death. Moreover, NAC and AY4 cotreatment augmented the reduced expression of antiapoptotic molecules, Bcl-XL and XIAP. In vivo administration of AY4 significantly inhibited tumor growth of head and neck cancer preestablished in athymic nude mice. In addition, in a zebrafish model used for toxicity testing, a considerable dose of AY4 did not result in embryotoxicity or neurotoxicity.
Conclusion : Our results demonstrates the effect of AY4 on apoptosis and tumor inhibition via ROS production and provide potential use of AY4 as an anticancer therapeutic agent in head and neck cancer.
Citation Format: {Authors}. {Abstract title} [abstract]. In: Proceedings of the 102nd Annual Meeting of the American Association for Cancer Research; 2011 Apr 2-6; Orlando, FL. Philadelphia (PA): AACR; Cancer Res 2011;71(8 Suppl):Abstract nr 4772. doi:10.1158/1538-7445.AM2011-4772
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Affiliation(s)
| | | | | | | | | | | | - Yoon Woo Koh
- 2Yonsei University College of Medicine, Seoul, Korea, Republic of
| | - Hyun Jun Hong
- 2Yonsei University College of Medicine, Seoul, Korea, Republic of
| | - Mi Ran Ryu
- 2Yonsei University College of Medicine, Seoul, Korea, Republic of
| | - Jae Wook Kim
- 3Soonchunhyang University College of Medicine, Bucheon, Korea, Republic of
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Koh YW, Hong HJ, Kim JW, Choi EC, Kim CH. Epigallocatechin-3-Gallate Inhibits Oral Cancer Progression. Otolaryngol Head Neck Surg 2010. [DOI: 10.1016/j.otohns.2010.06.338] [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: 10/19/2022]
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Koh YW, Hong HJ, Shin HA, Kim JW, Choi EC. Expanding the Tumor Size Limit in Endoscopic Thyroidectomy. Otolaryngol Head Neck Surg 2010. [DOI: 10.1016/j.otohns.2010.06.066] [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: 11/29/2022]
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Hong HJ, Koh YW, Shin YS, Lee SY, Choi EC. Sutureless Neck Dissection Using the Harmonic Scalpel. Otolaryngol Head Neck Surg 2010. [DOI: 10.1016/j.otohns.2010.06.397] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Joung YH, Youm JW, Jeon JH, Lee BC, Ryu CJ, Hong HJ, Kim HC, Joung H, Kim HS. Expression of the hepatitis B surface S and preS2 antigens in tubers of Solanum tuberosum. Plant Cell Rep 2004; 22:925-930. [PMID: 15048583 DOI: 10.1007/s00299-004-0775-1] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/01/2003] [Revised: 01/28/2004] [Accepted: 01/28/2004] [Indexed: 05/24/2023]
Abstract
In an attempt to develop an edible vaccine, we transformed a recombinant hepatitis B virus (HBV) gene encoding the middle protein of HBV that contains the surface S and preS2 antigen into potato by Agrobacterium-mediated transformation. The HBV gene was under control of either the CaMV 35S promoter, the double 35S promoter with the AlMV 5' non-translated leader sequence, or the tuber-specific patatin promoter. HBV mRNA levels were higher with the 35S promoter than with the double 35S and patatin promoters; however, the levels of the S and preS2 antigen in the transformed tubers were higher with the patatin promoter than with the CaMV 35S and double promoters. The levels of preS2 antigen produced are the highest reported to date. Transgenic potato tubers were fed to mice, and the mice showed an immune response against the HBV S antigen.
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Affiliation(s)
- Y H Joung
- Plant Genomics Laboratory, Korea Research Institute of Bioscience and Biotechnology, Yusung-Gu, P.O. Box 115, Taejeon, South Korea
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Hong HJ, Hsiao G, Cheng TH, Yen MH. Supplemention with tetrahydrobiopterin suppresses the development of hypertension in spontaneously hypertensive rats. Hypertension 2001; 38:1044-8. [PMID: 11711495 DOI: 10.1161/hy1101.095331] [Citation(s) in RCA: 142] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
It has been suggested that tetrahydrobiopterin (H(4)B), a cofactor of NO synthase, can reverse endothelial dysfunction caused by cardiovascular diseases, including atherosclerosis, coronary artery disease, and hypertension. Moreover, an impairment of H(4)B biosynthesis in spontaneously hypertensive rats (SHR) was observed. Thus, we hypothesized that the defect of the H(4)B synthesis system may play an important role in the development of hypertension in SHR. In the present study H(4)B (10 mg/kg per day IP) was used to treat SHR and Wistar-Kyoto rats (WKY) from the age of 5 through 16 weeks. Results demonstrated that chronic treatment with H(4)B significantly improved the impaired vascular responses to acetylcholine and suppressed the development of hypertension in SHR but did not affect WKY. The increase of inducible NO synthase expression, nitrotyrosine immunostaining, NO production, and superoxide anion formation in adult SHR were also significantly suppressed by chronic treatment with H(4)B. In contrast, H(4)B had no effect on WKY. In conclusion, this study demonstrated that H(4)B significantly attenuated the development of hypertension in SHR. The antihypertensive effect of H(4)B might be mediated through its direct antioxidant activity and/or decreasing oxygen free radical production from NO synthase, thereby reducing inducible NO synthase expression and peroxynitrite formation. Thus, the present study proposed that supplementation with H(4)B might be beneficial in preventing pathological conditions such as essential hypertension.
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Affiliation(s)
- H J Hong
- Graduate Institute of Life Sciences, Department of Pharmacology, National Defense Medical Center, Taipei Medical University, Taipei, Taiwan, Republic of China
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Tsai CS, Cheng TH, Lin CI, Chen JJ, Lee FY, Li CY, Hong HJ, Loh SH. Inhibitory effect of endothelin-1 on the isoproterenol-induced chloride current in human cardiac myocytes. Eur J Pharmacol 2001; 424:97-105. [PMID: 11476755 DOI: 10.1016/s0014-2999(01)01145-1] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
It is still controversial whether the cAMP-activated Cl(-) current (I(Cl,cAMP)) is expressed in human cardiomyocytes. The whole-cell configuration of the voltage-clamp technique was used to examine in detail the I(Cl,cAMP) in single human atrial and ventricular myocytes. Human cardiomyocytes were enzymatically isolated from atrial or ventricular specimens obtained from open-heart surgery or cardiac transplantation, respectively. Isoproterenol (1 microM) or forskolin (10 microM) was used to activate the cAMP second-messenger system. The isoproterenol- or forskolin-induced Cl(-) current was elicited in 12 of 54 atrial myocytes but was completely absent from ventricular myocytes. The isoproterenol-induced Cl(-) current in atrial myocytes was time-independent and had a reversal potential close to zero. Endothelin-1 (30 nM) inhibited the isoproterenol-induced Cl(-) current by 75+/-6% (n=4). This inhibitory effect of endothelin-1 was attenuated by pretreating atrial myocytes with the endothelin ET(A) receptor antagonist, BQ485, but not with the ET(B) receptor antagonist, BQ-788. The results provide evidence that the I(Cl,cAMP) exists in human atria, but not ventricle, and is inhibited by endothelin-1.
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Affiliation(s)
- C S Tsai
- Department of Surgery, National Defense Medical Center, Taipei, Taiwan
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Maeng CY, Oh MS, Park IH, Hong HJ. Purification and structural analysis of the hepatitis B virus preS1 expressed from Escherichia coli. Biochem Biophys Res Commun 2001; 282:787-92. [PMID: 11401532 DOI: 10.1006/bbrc.2001.4641] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
The preS1 of hepatitis B virus (HBV) is located at the outermost part of the envelope protein and possesses several functionally important regions such as hepatocyte receptor-binding site and virus-neutralizing epitopes. As the first step to understand the structure-function relationship for the preS1 antigen, we have purified the preS1 and performed its structural characterization by circular dichroism (CD) spectroscopy. The preS1 was purified to near homogeneity from bacterially expressed glutathione S-transferase (GST)-preS1 fusion protein by two-step purification, affinity chromatography on glutathione-agarose column, and cation-exchange chromatography on Mono S column. The CD analysis showed that the purified preS1, which was largely unstructured in aqueous solution, acquired a significant (16%) alpha-helical structure when analyzed in 50% trifluoroethanol or 20 mM SDS. The results suggest that the preS1 assumes a mainly unstructured conformation and may form induced secondary structures upon binding to target proteins or under hydrophobic environment.
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Affiliation(s)
- C Y Maeng
- Antibody Engineering Research Laboratory, Korea Research Institute of Bioscience and Biotechnology, Yusong, Taejon, 305-600
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Kim ES, Hong HJ, Choi CY, Cohen SN. Modulation of actinorhodin biosynthesis in Streptomyces lividans by glucose repression of afsR2 gene transcription. J Bacteriol 2001; 183:2198-203. [PMID: 11244057 PMCID: PMC95124 DOI: 10.1128/jb.183.7.2198-2203.2001] [Citation(s) in RCA: 40] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
While the biosynthetic gene cluster encoding the pigmented antibiotic actinorhodin (ACT) is present in the two closely related bacterial species, Streptomyces lividans and Streptomyces coelicolor, it normally is expressed only in S. coelicolor-generating the deep-blue colonies responsible for the S. coelicolor name. However, multiple copies of the two regulatory genes, afsR and afsR2, activate ACT production in S. lividans, indicating that this streptomycete encodes a functional ACT biosynthetic pathway. Here we report that the occurrence of ACT biosynthesis in S. lividans is determined conditionally by the carbon source used for culture. We found that the growth of S. lividans on solid media containing glucose prevents ACT production in this species by repressing the synthesis of afsR2 mRNA; a shift to glycerol as the sole carbon source dramatically relieved this repression, leading to extensive ACT synthesis and obliterating this phenotypic distinction between S. lividans and S. coelicolor. Transcription from the afsR2 promoter during growth in glycerol was dependent on afsR gene function and was developmentally regulated, occurring specifically at the time of aerial mycelium formation and coinciding temporally with the onset of ACT production. In liquid media, where morphological differentiation does not occur, ACT production in the absence of glucose increased as S. lividans cells entered stationary phase, but unlike ACT biosynthesis on solid media, occurred by a mechanism that did not require either afsR or afsR2. Our results identify parallel medium-dependent pathways that regulate ACT biosynthesis in S. lividans and further demonstrate that the production of this antibiotic in S. lividans grown on agar can be modulated by carbon source through the regulation of afsR2 mRNA synthesis.
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Affiliation(s)
- E S Kim
- Department of Genetics, Stanford University School of Medicine, Stanford, California 94305-5120, USA
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Park SS, Ryu CJ, Kang YJ, Kashmiri SV, Hong HJ. Generation and characterization of a novel tetravalent bispecific antibody that binds to hepatitis B virus surface antigens. Mol Immunol 2000; 37:1123-30. [PMID: 11451417 DOI: 10.1016/s0161-5890(01)00027-x] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Hepatitis B virus (HBV) infection is a worldwide public health problem affecting about 350 million people. HBV envelope contains three surface antigens, called pre-S1, pre-S2 and S. For the prophylaxis of HBV infection, only an anti-S monoclonal antibody was tested for the protective efficacy against HBV infection, but it was shown to be incomplete. In addition, some immune escape mutants carrying mutations on the S antigen were reported. Therefore, a multivalent bispecific antibody rather than a single monoclonal antibody would be more beneficial for the prophylaxis of HBV infection. We have generated a novel tetravalent bispecific antibody with two binding sites for each of the S and pre-S2 antigens. Each of the antigen-binding sites was composed of a single-chain Fv (ScFv). The tetravalent antibody was generated by constructing a single gene encoding a single-chain protein. This protein consisted of an anti-S ScFv whose carboxyl end was tethered, through a 45 amino acid linker, to the amino terminus of anti-preS2 ScFv that in turn was joined to the hinge region of human gamma1 constant region. The single-chain protein was expressed in Chinese hamster ovary cells and secreted in culture supernatant as a homodimeric molecule. The tetravalent bispecific antibody showed both anti-S and anti-pre-S2 binding activities. In addition, the binding affinity of the bispecific antiboy for HBV particles was greater than that of either parental antibody. The tetravalent bispecific antibody is a potentially useful reagent for the prevention and treatment of HBV infection.
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Affiliation(s)
- S S Park
- The Antibody Engineering Research Laboratory, Korea Research Institute of Bioscience and Biotechnology, PO Box 115, Yuseong, Taejon 305-600, South Korea
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Hong HJ, Lee JW, Park SS, Kang YJ, Chang SY, Kim KM, Kim JO, Murthy KK, Payne JS, Yoon SK, Park MJ, Kim IC, Kim JG, Kang CY. A humanized anti--4-1BB monoclonal antibody suppresses antigen-induced humoral immune response in nonhuman primates. J Immunother 2000; 23:613-21. [PMID: 11186149 DOI: 10.1097/00002371-200011000-00002] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.5] [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: 11/26/2022]
Abstract
The interaction of 4-1BB and its ligand plays an important role in the regulation of T-cell-mediated immune responses. In this study, the authors examined the effect of a humanized anti--4-1BB monoclonal antibody (H4B4) on ovalbumin-induced immune responses in baboons. Previously, a mouse monoclonal antibody, 4B4 against the human 4-1BB molecule, was generated and characterized. Based on this antibody, a humanized version of 4B4 monoclonal antibody was constructed and the resultant antibody, H4B4, showed full recovery of the binding activity of the original antibody 4B4: a 1.5-fold increase in affinity for 4-1BB. In addition, H4B4 mediated antibody-dependent cellular cytotoxicity of activated human peripheral blood T cells and CEM cells in a dose-dependent manner. Weekly administration of H4B4 at doses of 1 or 4 mg/kg could suppress immunoglobulin G production against ovalbumin. This was not a result of the overall immune suppression, because the numbers of B and T cells and the total immunoglobulin G production were not altered during treatment with H4B4. These findings suggest that treatment with H4B4 may be a valid therapeutic approach to control unwanted immune responses in persons with autoimmune diseases.
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Affiliation(s)
- H J Hong
- Korea Research Institute of Bioscience and Biotechnology, Taejon
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44
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Abstract
We identified the epitopes on the preS1 which induce antibodies that neutralize both ad and ay subtypes of hepatitis B virus (HBV). Previously we generated murine monoclonal antibodies KR359 and KR127 that bind specifically to the preS1 of HBV. In this study we have performed fine mappings of the epitopes of the antibodies by examining their reactivity with GST fusion proteins, which contain a series of deletion mutants of the preS1. KR359 and KR127 specifically recognize aa 19-26 and 37-45 of the preS1, respectively. The antibodies neutralized both adr and ayw subtypes of the virus in an in vitro neutralization assay using in vitro infection of adult human hepatocyte primary culture by HBV. The epitopes showed little sequence divergence and the antibodies bound to the preS1 of all the HBV subtypes and variants tested.
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Affiliation(s)
- C Y Maeng
- Antibody Engineering Research Unit, Korea Research Institute of Bioscience and Biotechnology, Taejon, Yuseong, 305-600, Korea
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Ryu CJ, Kim YK, Hur H, Kim HS, Oh JM, Kang YJ, Hong HJ. Mouse monoclonal antibodies to hepatitis B virus preS1 produced after immunization with recombinant preS1 peptide. Hybridoma (Larchmt) 2000; 19:185-9. [PMID: 10868800 DOI: 10.1089/02724570050031248] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.8] [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: 12/18/2022]
Abstract
We have efficiently generated mouse monoclonal antibodies (MAbs), which bind specifically to amino acids 21-47 of the preS1 domain of hepatitis B virus (HBV) by immunizing mice with the preS1 peptide (amino acids, aa 1-56) conjugated to keyhole limpet hemocyanin. Hybridomas were screened by an indirect enzyme-linked immunosorbent assay (ELISA) using the purified preS1 peptide as a coated antigen. Eighteen positive hybridomas were selected and subjected to isotyping. Of these, 5 clones secreted immunoglobulin G (IgG) and 13 clones secreted IgM. Four (KR1, KR2, KR3, and KR4) of the 5 IgG MAbs bound to preS1 peptide (aa 21-47). Epitope mapping using bacterially expressed GST fusion proteins revealed that three clones (KR2, KR3, KR4) (IgG1, K) recognize aa 21-35, while KR1 (IgG2a, K) recognizes aa 35-47 of the preS1. These MAbs immunoprecipitated HBV particles, demonstrating that they bind to native HBV particles.
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Affiliation(s)
- C J Ryu
- Antibody Engineering Research Unit, Korea Research Institute of Bioscience and Biotechnology, Yuseong, Taejon
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46
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Abstract
It has been suggested that hepatitis B virus (HBV) binds to a receptor on the plasma membrane of human hepatocytes via the pre-S1 domain of the large envelope protein as an initial step in HBV infection. However, the nature of the receptor remains controversial. In an attempt to identify a cell surface receptor for HBV, purified recombinant fusion protein of the pre-S1 domain of HBV with glutathione S-transferase (GST), expressed in Escherichia coli, was used as a ligand. The surface of human hepatocytes or HepG2 cells was biotinylated, and the cell lysate (precleared lysate) which did not bind to GST and glutathione-Sepharose beads was used as a source of receptor molecules. The precleared lysate of the biotinylated cells was incubated with the GST-pre-S1 fusion protein, and the bound proteins were visualized by Western blotting and enhanced chemiluminescence. An approximately 80-kDa protein (p80) was shown to bind specifically to the pre-S1 domain of the fusion protein. The receptor binding assay using serially or internally deleted segments of pre-S1 showed that amino acid residues 12 to 20 and 82 to 90 are essential for the binding of pre-S1 to p80. p80 also bound specifically to the pre-S1 of native HBV particles. Analysis of the tissue and species specificity of p80 expression in several available human primary cultures and cell lines of different tissue origin showed that p80 expression is not restricted to human hepatocytes. Taken together the results suggest that p80 may be a component of the viral entry machinery.
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Affiliation(s)
- C J Ryu
- Antibody Engineering Research Unit, Korea Research Institute of Bioscience and Biotechnology, Yuseong, Taejon 305-600, Korea
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Sohn BH, Kim SJ, Park H, Park SK, Lee SC, Hong HJ, Park YS, Lee KK. Expression and characterization of bioactive human thrombopoietin in the milk of transgenic mice. DNA Cell Biol 1999; 18:845-52. [PMID: 10595398 DOI: 10.1089/104454999314845] [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: 02/06/2023] Open
Abstract
Human thrombopoietin (hTPO) is the primary physiological regulator of platelet production and plays a pivotal role in promoting the proliferation and maturation of megakaryocytic progenitor cells and megakaryocytes. In this study, transgenic mice were produced harboring either full-length or the erythropoietin (EPO)-like amino-terminal domain of hTPO cDNA sequences fused to the regulatory elements of the bovine beta-casein gene. The transgene RNA was expressed exclusively in the mammary glands of eight transgenic mice, and a trace amount of the transgene was also found in the lungs of one mouse. The full-length form induced efficient expression of the protein with the highest expression level of 1500 microg/ml; however, the EPO-like domain alone expressed the protein at <0.1 microg/ml. The proteins from the two recombinant cDNAs have apparent molecular weights of about 74 and 17 kDa, due to glycosylation in the case of the full-length cDNA. Cell proliferation assay in vitro indicated that both of the recombinant forms stimulated proliferation of the TPO-dependent BaF3-Mpl cells. A positive correlation appeared between the amount of TPO in the milk of lactating animals and their blood platelet levels. About a twofold increase in platelet numbers in the blood was observed after direct subcutaneous injection of the recombinant hTPO at the level of 30 microg/kg of body weight. On the basis of these results, we anticipate that the recombinant hTPO produced efficiently in milk of transgenic mice will have the same activities as the native hTPO in a few in vivo as well as in vitro biochemical aspects.
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Affiliation(s)
- B H Sohn
- Animal Developmental Biology, Korea Research Institute of Bioscience and Biotechnology, Taejon
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Lee HS, Shu L, De Pascalis R, Giuliano M, Zhu M, Padlan EA, Hand PH, Schlom J, Hong HJ, Kashmiri SV. Generation and characterization of a novel single-gene-encoded single-chain immunoglobulin molecule with antigen binding activity and effector functions. Mol Immunol 1999; 36:61-71. [PMID: 10369421 DOI: 10.1016/s0161-5890(98)00109-6] [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: 10/17/2022]
Abstract
Monoclonal antibody (MAb) CC49 is a murine IgG1 that reacts with tumor-associated glycoprotein (TAG)-72, a pancarcinoma antigen. Clinical trials using radiolabeled CC49 for diagnostic imaging have demonstrated specific localization of more than 90% of carcinomas. The feasibility of adopting in vivo gene inoculation methods for antibody-based immunotherapy requires introduction and expression of two genes, encoding immunoglobulin (Ig) heavy and light chains, in a single cell to generate a functional antibody. To circumvent the problems inherent in this approach, we have constructed a single-gene encoding a single-chain immunoglobulin (SCIg) that, unlike previously developed SCIgs, contains all IgG domains. To construct the novel SCIg, the carboxyl end of the constant region of the chimeric (c) CC49 kappa chain is joined, via a 30 residue Gly-Ser linker peptide, to the amino terminus of the CC49 heavy chain. To our knowledge, neither a linker peptide this long nor a linkage between the constant light (C(L)) and variable heavy domains has been reported previously. Transfectomas developed by introducing the expression construct of the amplifiable gene in dihydrofolate reductase-deficient Chinese hamster ovary (CHO dhfr-) cells secrete a 160 kDa homodimeric molecule, SCIgcCC49. The in vitro antigen binding properties of SCIgcCC49 are comparable to those of cCC49 and SCIgcCC49deltaC(H)1, a single-chain Ig deficient in constant heavy chain-1 (C(H)1) and C(L) domains. The antibody-dependent cellular cytotoxicity (ADCC) of SCIgcCC49 and cCC49 were also comparable. This single-gene approach for generating an immunoglobulin molecule may facilitate in vivo gene inoculation as well as ex vivo transfection of patients' cultured tumor-infiltrating lymphocytes for immunotherapy protocols for a variety of diseases, including cancer.
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Affiliation(s)
- H S Lee
- Laboratory of Tumor Immunology and Biology, National Cancer Institute, National Institutes of Health, Bethesda, MD 20892, USA
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Choi IH, Park SG, Chung JH, Kim IJ, Hong HJ. Generation of human Fab monoclonal antibodies against preS1 of hepatitis B virus using repertoire cloning. Hybridoma (Larchmt) 1998; 17:535-40. [PMID: 9890709 DOI: 10.1089/hyb.1998.17.535] [Citation(s) in RCA: 6] [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] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
Human monoclonal antibodies (MAbs) have considerable potential in the prevention and treatment of many viral diseases. A combinatorial antibody library of heavy (Fd)- and light-chain genes derived from peripheral blood lymphocytes of a volunteer with high antibody titer to preS1 of HBV was constructed and expressed on the surface of filamentous phages. The library contained 7 x 10(9) independent clones. A phage antibody population from the third panning against preS1 was converted to one expressing soluble Fabs by removal of the g3 sequences from the pComb3 phagemid vector and subsequent transformation into E. coli TG1 cells. Screening of the library led to the identification of two clones, 3DW and 8GW, showing high reactivity toward preS1. The authenticity of the Fabs was confirmed by immunoblot analysis which yielded approximately 60 and approximately 30 kDa bands under nonreducing and reducing conditions, respectively. The soluble Fabs of 3DW and 8GW exhibited relative affinities of 6 x 10(5) and 8 x 10(6) M(-1), respectively. The sequencing results demonstrate that all Fd sequences belong to subgroup II and all light chain sequences belong to subgroup I. There are differences in CDR length and composition, especially in the FW3 and CDR3 regions of the heavy- and light-chain genes. These human Fab MAbs specific to preS1, generated from a combinatorial library, represent prototypes of passive immunotherapy candidates for viral hepatitis B.
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Affiliation(s)
- I H Choi
- Department of Microbiology, College of Medicine, Inje University, Pusan, Korea
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50
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Abstract
Platelet production in blood is regulated by a lineage specific humoral factor, thrombopoietin (TPO). The amino terminal domain of TPO (TPO-N) is responsible for the signal transduction mediated by the TPO receptor, c-mpl. From the predicted length of helices we found that TPO-N belongs to the long-chain subfamily of the four-helix bundle cytokine family. We built a three dimensional model of TPO-N by a comparative homology modeling procedure. The four helices of TPO-N with an up-up-down-down topology are stabilized by a tightly packed central hydrophobic core and the extended loop AB makes an additional hydrophobic core with helices B and D outside of the four helix bundle scaffold. An interpretation of the previous site directed mutageneses results in light of the model enabled us to identify two isolated receptor binding sites. The surface made of Lys 136, Lys 138 and Lys 140 in helix D, and Pro 42 and Glu 50 in loop AB forms the first receptor binding site, while the surface of Asp 8, Arg 10 and Lys 14 in helix A represents the second binding site for the sequential receptor oligomerization.
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Affiliation(s)
- J S Song
- Protein Engineering Research Division, Korea Research Institute of Bioscience & Biotechnology, KIST, Taejon, South Korea
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