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Na HS, Kwon HK, Shin SC, Cheon YI, Seo M, Lee JC, Sung ES, Lee M, Kim IJ, Kim BH, Lee BJ. Clinical outcomes of T4a papillary thyroid cancer with recurrent laryngeal nerve involvement: a retrospective analysis. Sci Rep 2021; 11:6707. [PMID: 33758286 PMCID: PMC7988054 DOI: 10.1038/s41598-021-86226-x] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2020] [Accepted: 03/09/2021] [Indexed: 11/28/2022] Open
Abstract
Preoperative vocal cord palsy (VCP) may indicate locally invasive papillary thyroid cancer (PTC); using this relationship, we evaluated the clinical outcomes and risk factors for recurrence in post-thyroidectomy T4a PTC patients with recurrent laryngeal nerve (RLN) involvement. We retrospectively investigated thyroidectomy patients, recorded their clinical factors, recurrence rate, and pathological findings, and analysed the relationship between recurrence rate and clinical factors. Of 72 patients, 37 (51%) had preoperative VCP and 35 (49%) had normal preoperative vocal cord movement with confirmed intraoperative RLN invasion. Tracheal and esophageal invasion was observed in 13 (18%) and 15 (21%) patients, respectively. Thyroid cancer recurred in 18 (25%) patients over 58 months, resulting in 2 (3%) deaths. Recurrence was not associated with surgical extent, organ invasion, enlarged tumour size, or lymph node infiltration (p > 0.05). The recurrence rate was significantly higher in patients with positive resection margins (p < 0.05). T4a PTC patients with RLN involvement showed a poor prognosis. The recurrence rate was not affected by preoperative VCP, intraoperative detection of RLN invasion, nerve resection, nerve preservation by shaving, lymph node metastasis, or tracheal or esophageal invasion. The most important prognostic factor for recurrence was a positive resection margin.
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Affiliation(s)
- Han-Seul Na
- Department of Otolaryngology-Head and Neck Surgery, College of Medicine, Pusan National University and Medical Research Institute, Pusan National University Hospital, 179 Gudeok-ro, Seo-gu, Busan, 49241, South Korea
| | - Hyun-Keun Kwon
- Department of Otolaryngology-Head and Neck Surgery, College of Medicine, Pusan National University and Medical Research Institute, Pusan National University Hospital, 179 Gudeok-ro, Seo-gu, Busan, 49241, South Korea
| | - Sung-Chan Shin
- Department of Otolaryngology-Head and Neck Surgery, College of Medicine, Pusan National University and Medical Research Institute, Pusan National University Hospital, 179 Gudeok-ro, Seo-gu, Busan, 49241, South Korea
| | - Yong-Il Cheon
- Department of Otolaryngology-Head and Neck Surgery, College of Medicine, Pusan National University and Medical Research Institute, Pusan National University Hospital, 179 Gudeok-ro, Seo-gu, Busan, 49241, South Korea
| | - Myeonggu Seo
- Department of Otolaryngology-Head and Neck Surgery, College of Medicine, Pusan National University and Medical Research Institute, Pusan National University Hospital, 179 Gudeok-ro, Seo-gu, Busan, 49241, South Korea
| | - Jin-Choon Lee
- Department of Otorhinolaryngology-Head and Neck Surgery, College of Research Institute for Convergence of Biomedical Science and Technology, Pusan National University Yangsan Hospital, Yangsan, South Korea
| | - Eui-Suk Sung
- Department of Otorhinolaryngology-Head and Neck Surgery, College of Research Institute for Convergence of Biomedical Science and Technology, Pusan National University Yangsan Hospital, Yangsan, South Korea
| | - Minhyung Lee
- Department of Otorhinolaryngology-Head and Neck Surgery, College of Research Institute for Convergence of Biomedical Science and Technology, Pusan National University Yangsan Hospital, Yangsan, South Korea
| | - In-Joo Kim
- Division of Endocrinology and Metabolism, Department of Internal Medicine, Biomedical Research Institute, Pusan National University Hospital, Busan, South Korea
| | - Bo Hyun Kim
- Division of Endocrinology and Metabolism, Department of Internal Medicine, Biomedical Research Institute, Pusan National University Hospital, Busan, South Korea
| | - Byung-Joo Lee
- Department of Otolaryngology-Head and Neck Surgery, College of Medicine, Pusan National University and Medical Research Institute, Pusan National University Hospital, 179 Gudeok-ro, Seo-gu, Busan, 49241, South Korea.
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Kwon HK, Cheon YI, Shin SC, Sung ES, Lee JC, Kim IJ, Lee BJ. Risk factors of suprasternal lymph node metastasis in papillary thyroid carcinoma with clinical lateral cervical lymph node metastasis. Gland Surg 2021; 10:512-520. [PMID: 33708534 DOI: 10.21037/gs-20-368] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [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 Metastatic lymph nodes are occasionally found in suprasternal lymph nodes in patients with papillary thyroid cancer (PTC). However, limited studies have examined these lymph nodes thus far. Therefore, we investigated the frequency and risk factors of suprasternal lymph node metastasis in patients with PTC and lateral cervical lymph node metastasis. Methods A total of 85 patients with cN1b PTC underwent total thyroidectomy, central neck dissection, and ipsilateral selective neck dissection including suprasternal lymph node dissection. We analyzed the correlation between suprasternal lymph node metastasis and sex, age, tumor characteristics, and cervical lymph node metastasis status. Results Eleven (12.9%) patients had pathological suprasternal lymph node metastasis. Suprasternal lymph node metastasis was associated with tumors located in the inferior pole of the thyroid gland and level IV lymph node metastasis (P=0.005 and 0.014, respectively). Receiver operating characteristic curve analysis indicated that two or more level IV metastatic lymph nodes had the best predictive value for suprasternal lymph node metastasis (P<0.001). Conclusions In patients with cN1b PTC, especially those with tumors in the inferior pole of the thyroid gland or level IV lymph node metastasis, greater attention should be paid to the suprasternal lymph nodes and suprasternal lymph node dissection should be routinely included as part of selective neck dissection.
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Affiliation(s)
- Hyun-Keun Kwon
- Department of Otorhinolaryngology-Head and Neck Surgery, College of Medicine, Pusan National University and Biomedical Research Institute, Pusan National University Hospital, Busan, Korea
| | - Yong-Il Cheon
- Department of Otorhinolaryngology-Head and Neck Surgery, College of Medicine, Pusan National University and Biomedical Research Institute, Pusan National University Hospital, Busan, Korea
| | - Sung-Chan Shin
- Department of Otorhinolaryngology-Head and Neck Surgery, College of Medicine, Pusan National University and Biomedical Research Institute, Pusan National University Hospital, Busan, Korea
| | - Eui-Suk Sung
- Department of Otorhinolaryngology-Head and Neck Surgery, College of Research Institute for Convergence of Biomedical Science and Technology, Pusan National University Yangsan Hospital, Yangsan, Korea
| | - Jin-Choon Lee
- Department of Otorhinolaryngology-Head and Neck Surgery, College of Research Institute for Convergence of Biomedical Science and Technology, Pusan National University Yangsan Hospital, Yangsan, Korea
| | - In Ju Kim
- Department of Internal medicine, College of Medicine and Medical Research Institute, Pusan National University Hospital, Busan, Korea
| | - Byung-Joo Lee
- Department of Otorhinolaryngology-Head and Neck Surgery, College of Medicine, Pusan National University and Biomedical Research Institute, Pusan National University Hospital, Busan, Korea
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Kwon HK, Kim JM, Shin SC, Sung ES, Kim HS, Park GC, Cheon YI, Lee JC, Lee BJ. The mechanism of submandibular gland dysfunction after menopause may be associated with the ferroptosis. Aging (Albany NY) 2020; 12:21376-21390. [PMID: 33159020 PMCID: PMC7695378 DOI: 10.18632/aging.103882] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2020] [Accepted: 07/14/2020] [Indexed: 12/30/2022]
Abstract
Salivary gland dysfunction is a common symptom that occurs after menopause. This study was performed to investigate the mechanism of salivary gland dysfunction to confirm the relationship between ferroptosis and salivary gland dysfunction by ovariectomy. Forty-eight female rats were randomly divided into four groups (12 rats in each group). Histology, real time PCR, western blot, immunohistochemistry, electron microscopy, cytosolic iron assay, and salivary function were analyzed. Human salivary gland tissue analysis was also done. Lipogenesis and lipid deposition in the submandibular gland tissue occurred after ovariectomy. ROS generation, MDA+HAE was increased and GPX4 activity was decreased and in the OVX group compared to the CON group. Iron deposition in the submandibular gland tissue was increased in the OVX group. Submandibular gland fibrosis was increased and saliva secretion was decreased in the OVX group. In human submandibular gland analysis, lipid and iron deposition was also increased in the postmenopause group. This is the first in vivo study in which salivary gland dysfunction is associated with the ferroptosis in postmenopausal animal model. Increased lipid and iron deposition in normal submandibular gland tissues of postmenopausal women can suggest that the salivary gland dysfunction after menopause may be associated with the ferroptosis.
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Affiliation(s)
- Hyun-Keun Kwon
- Department of Otorhinolaryngology-Head and Neck Surgery, College of Medicine, Pusan National University and Medical Research Institute, Pusan National University Hospital, Busan, Korea
| | - Ji Min Kim
- Pusan National University Medical Research Institute, Pusan National University School of Medicine, Busan, Korea
| | - Sung-Chan Shin
- Department of Otorhinolaryngology-Head and Neck Surgery, College of Medicine, Pusan National University and Medical Research Institute, Pusan National University Hospital, Busan, Korea
| | - Eui-Suk Sung
- Department of Otorhinolaryngology-Head and Neck Surgery, College of Research Institute for Convergence of Biomedical Science and Technology, Pusan National University Yangsan Hospital, Yangsan, Korea
| | - Hyung-Sik Kim
- Department of Life Science in Dentistry, School of Dentistry, Pusan National University, Yangsan, Korea
| | - Gi Cheol Park
- Department of Otolaryngology-Head and Neck Surgery, Samsung Changwon Hospital, Sungkyunkwan University School of Medicine, Changwon, Korea
| | - Yong-Il Cheon
- Department of Otorhinolaryngology-Head and Neck Surgery, College of Medicine, Pusan National University and Medical Research Institute, Pusan National University Hospital, Busan, Korea
| | - Jin-Choon Lee
- Department of Otorhinolaryngology-Head and Neck Surgery, College of Research Institute for Convergence of Biomedical Science and Technology, Pusan National University Yangsan Hospital, Yangsan, Korea
| | - Byung-Joo Lee
- Department of Otorhinolaryngology-Head and Neck Surgery, College of Medicine, Pusan National University and Medical Research Institute, Pusan National University Hospital, Busan, Korea
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Sung ES, Shin SC, Kwon HK, Kim J, Park DH, Choi SW, Kim SH, Lee JC, Ro JH, Lee BJ. Application of Novel Intraoperative Neuromonitoring System Using an Endotracheal Tube With Pressure Sensor During Thyroid Surgery: A Porcine Model Study. Clin Exp Otorhinolaryngol 2020; 13:291-298. [PMID: 32668828 PMCID: PMC7435431 DOI: 10.21053/ceo.2019.01249] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2019] [Accepted: 11/13/2019] [Indexed: 11/22/2022] Open
Abstract
OBJECTIVES The loss of signal during intraoperative neuromonitoring (IONM) using electromyography (EMG) in thyroidectomy is one of the biggest problems. We have developed a novel IONM system with an endotracheal tube (ETT) with an attached pressure sensor instead of EMG to detect laryngeal twitching. The aim of the present study was to investigate the feasibility and reliability of this novel IONM system using an ETT with pressure sensor during thyroidectomy in a porcine model. METHODS We developed an ETT-attached pressure sensor that uses the piezoelectric effect to measure laryngeal muscle twitching. Stimulus thresholds, amplitude, and latency of laryngeal twitching evaluated using the pressure sensor were compared to those measured using transcartilage needle EMG. The measured amplitude changes by EMG and the pressure sensor during recurrent laryngeal nerve (RLN) traction injury were compared. RESULTS No significant differences in stimulus threshold intensity between EMG and the pressure sensor were observed. The EMG amplitude detected at 0.3 mA, increased with increasing stimulus intensity. When the stimulus was more than 1.0 mA, the amplitude showed a plateau. In a RLN traction injury experiment, the EMG amplitude did not recover even 20 minutes after stopping RLN traction. However, the pressure sensor showed a mostly recovery. CONCLUSION The change in amplitude due to stimulation of the pressure sensor showed a pattern similar to EMG. Pressure sensors can be feasibly and reliably used for RLN traction injury prediction, RLN identification, and preservation through the detection of laryngeal muscle twitching. Our novel IONM system that uses an ETT with an attached pressure sensor to measure the change of surface pressure can be an alternative to EMG in the future.
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Affiliation(s)
- Eui-Suk Sung
- Department of Otolaryngology-Head and Neck Surgery, School of Medicine, Pusan National University and Research Institute for Convergence of Biomedical Science and Technology, Pusan National University Yangsan Hospital, Yangsan, Korea
| | - Sung-Chan Shin
- Department of Otorhinolaryngology-Head and Neck Surgery, School of Medicine, Pusan National University and Medical Research Institute, Pusan National University Hospital, Busan, Korea
| | - Hyun-Keun Kwon
- Department of Otolaryngology-Head and Neck Surgery, School of Medicine, Pusan National University and Research Institute for Convergence of Biomedical Science and Technology, Pusan National University Yangsan Hospital, Yangsan, Korea
| | - Jia Kim
- Department of Otorhinolaryngology-Head and Neck Surgery, School of Medicine, Pusan National University and Medical Research Institute, Pusan National University Hospital, Busan, Korea
| | - Da-Hee Park
- Department of Otolaryngology-Head and Neck Surgery, School of Medicine, Pusan National University and Research Institute for Convergence of Biomedical Science and Technology, Pusan National University Yangsan Hospital, Yangsan, Korea
| | - Seong-Wook Choi
- Department of Otolaryngology-Head and Neck Surgery, School of Medicine, Pusan National University and Research Institute for Convergence of Biomedical Science and Technology, Pusan National University Yangsan Hospital, Yangsan, Korea
| | - Sang-Hoon Kim
- Department of Otorhinolaryngology-Head and Neck Surgery, School of Medicine, Pusan National University and Medical Research Institute, Pusan National University Hospital, Busan, Korea
| | - Jin-Choon Lee
- Department of Otolaryngology-Head and Neck Surgery, School of Medicine, Pusan National University and Research Institute for Convergence of Biomedical Science and Technology, Pusan National University Yangsan Hospital, Yangsan, Korea
| | - Jung-Hoon Ro
- Department of Biomedical Engineering, Pusan National University Hospital, Busan, Korea
| | - Byung-Joo Lee
- Department of Otorhinolaryngology-Head and Neck Surgery, School of Medicine, Pusan National University and Medical Research Institute, Pusan National University Hospital, Busan, Korea
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Sung ES, Kwon HK, Shin SC, Cheon YI, Lee JW, Park DH, Choi SW, Kim HB, Park HJ, Lee JC, Ro JH, Lee BJ. Application of an Intraoperative Neuromonitoring System Using a Surface Pressure Sensor in Parotid Surgery: A Rabbit Model Study. Clin Exp Otorhinolaryngol 2020; 14:131-136. [PMID: 32623851 PMCID: PMC7904436 DOI: 10.21053/ceo.2019.01900] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2019] [Accepted: 03/31/2020] [Indexed: 11/22/2022] Open
Abstract
Objectives Facial nerve monitoring (FNM) can be used to identify the facial nerve, to obtain information regarding its course, and to evaluate its status during parotidectomy. However, there has been disagreement regarding the efficacy of FNM in reducing the incidence of facial nerve palsy during parotid surgery. Therefore, instead of using electromyography (EMG) to identify the location and state of the facial nerve, we applied an intraoperative neuromonitoring (IONM) system using a surface pressure sensor to detect facial muscle twitching. The objective of this study was to investigate the feasibility of using the IONM system with a surface pressure sensor to detect facial muscle twitching during parotidectomy. Methods We evaluated the stimulus thresholds for the detection of muscle twitching in the orbicularis oris and orbicularis oculi, as well as the amplitude and latency of EMG and the surface pressure sensor in 13 facial nerves of seven rabbits, using the same stimulus intensity. Results The surface pressure sensor detected muscle twitching in the orbicularis oris and orbicularis oculi in response to a stimulation of 0.1 mA in all 13 facial nerves. The stimulus threshold did not differ between the surface pressure sensor and EMG. Conclusion The application of IONM using a surface pressure sensor during parotidectomy is noninvasive, reliable, and feasible. Therefore, the IONM system with a surface pressure sensor to measure facial muscle twitching may be an alternative to EMG for verifying the status of the facial nerve.
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Affiliation(s)
- Eui-Suk Sung
- Department of Otolaryngology-Head and Neck Surgery, Pusan National University Yangsan Hospital, College of Medicine and Research Institute for Convergence of Biomedical Science and Technology, Yangsan, Korea
| | - Hyun-Keun Kwon
- Department of Otolaryngology-Head and Neck Surgery, Pusan National University Yangsan Hospital, College of Medicine and Research Institute for Convergence of Biomedical Science and Technology, Yangsan, Korea
| | - Sung-Chan Shin
- Department of Otolaryngology-Head and Neck Surgery, Pusan National University Hospital, College of Medicine and Medical Research Institute, Busan, Korea
| | - Young-Il Cheon
- Department of Otolaryngology-Head and Neck Surgery, Pusan National University Hospital, College of Medicine and Medical Research Institute, Busan, Korea
| | - Jung-Woo Lee
- Department of Otolaryngology-Head and Neck Surgery, Pusan National University Hospital, College of Medicine and Medical Research Institute, Busan, Korea
| | - Da-Hee Park
- Department of Otolaryngology-Head and Neck Surgery, Pusan National University Yangsan Hospital, College of Medicine and Research Institute for Convergence of Biomedical Science and Technology, Yangsan, Korea
| | - Seong-Wook Choi
- Department of Otolaryngology-Head and Neck Surgery, Pusan National University Yangsan Hospital, College of Medicine and Research Institute for Convergence of Biomedical Science and Technology, Yangsan, Korea
| | - Hwa-Bin Kim
- Department of Otolaryngology-Head and Neck Surgery, Pusan National University Hospital, College of Medicine and Medical Research Institute, Busan, Korea
| | - Hye-Jin Park
- Department of Otolaryngology-Head and Neck Surgery, Pusan National University Hospital, College of Medicine and Medical Research Institute, Busan, Korea
| | - Jin-Choon Lee
- Department of Otolaryngology-Head and Neck Surgery, Pusan National University Yangsan Hospital, College of Medicine and Research Institute for Convergence of Biomedical Science and Technology, Yangsan, Korea
| | - Jung-Hoon Ro
- Department of Biomedical Engineering, Pusan National University Hospital, College of Medicine and Medical Research Institute, Busan, Korea
| | - Byung-Joo Lee
- Department of Otolaryngology-Head and Neck Surgery, Pusan National University Hospital, College of Medicine and Medical Research Institute, Busan, Korea
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Kwon HK, Cheon YI, Shin SC, Kim GH, Lee YW, Sung ES, Lee JC, Lee BJ. Clinical Significance of the Preoperative Thyroidectomy-Related Voice Questionnaire Score in Thyroid Surgery. J Voice 2020; 36:145.e7-145.e13. [PMID: 32389503 DOI: 10.1016/j.jvoice.2020.04.017] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2019] [Revised: 03/26/2020] [Accepted: 04/01/2020] [Indexed: 11/28/2022]
Abstract
BACKGROUND The thyroidectomy-related voice questionnaire (TVQ) is an efficient screening tool for detecting postoperative vocal dysfunction. The aim of this study was to confirm the significance of the preoperative TVQ score in thyroid surgery. METHODS We examined 180 women who underwent total thyroidectomy with central lymph node dissection from March 2014 to May 2016. Based on the preoperative TVQ score, participants were categorized under "normal" (TVQ score <5) and "abnormal" (TVQ score ≥5) groups. The laryngoscopic examination and acoustic analysis were performed and the TVQ score assessed before and after surgery (2 weeks, 2 months, and 8 months). RESULTS In the normal group, the TVQ score increased up to 2 months postoperatively and had decreased at 8 months postoperatively but was significantly higher than the preoperative TVQ score. In the abnormal group, the TVQ score increased up to 2 months postoperatively but had recovered similar to the preoperative TVQ score 8 months postoperatively. The preoperative TVQ score in the abnormal group moderately correlated with the final TVQ score; however, the preoperative TVQ score in the normal group did not correlate with the TVQ score 8 months postoperatively. CONCLUSION During preoperative patient counseling, it is important to explain that voice changes without vocal cord palsy may occur postoperatively and that it may take a long time to resolve, particularly in patients with a normal preoperative TVQ score.
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Affiliation(s)
- Hyun-Keun Kwon
- Department of Otorhinolaryngology-Head and Neck Surgery, College of Medicine, Pusan National University and Medical Research Institute, Pusan National University Hospital, Busan, South Korea
| | - Yong-Il Cheon
- Department of Otorhinolaryngology-Head and Neck Surgery, College of Medicine, Pusan National University and Medical Research Institute, Pusan National University Hospital, Busan, South Korea
| | - Sung-Chan Shin
- Department of Otorhinolaryngology-Head and Neck Surgery, College of Medicine, Pusan National University and Medical Research Institute, Pusan National University Hospital, Busan, South Korea
| | - Geun-Hyo Kim
- Department of Otorhinolaryngology-Head and Neck Surgery, College of Medicine, Pusan National University and Medical Research Institute, Pusan National University Hospital, Busan, South Korea
| | - Yeon-Woo Lee
- Department of Otorhinolaryngology-Head and Neck Surgery, College of Medicine, Pusan National University and Medical Research Institute, Pusan National University Hospital, Busan, South Korea
| | - Eui-Suk Sung
- Department of Otorhinolaryngology-Head and Neck Surgery, College of Research Institute for Convergence of Biomedical Science and Technology, Pusan National University Yangsan Hospital, Yangsan, South Korea
| | - Jin-Choon Lee
- Department of Otorhinolaryngology-Head and Neck Surgery, College of Research Institute for Convergence of Biomedical Science and Technology, Pusan National University Yangsan Hospital, Yangsan, South Korea
| | - Byung-Joo Lee
- Department of Otorhinolaryngology-Head and Neck Surgery, College of Medicine, Pusan National University and Medical Research Institute, Pusan National University Hospital, Busan, South Korea.
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Seo Y, Shin TH, Ahn JS, Oh SJ, Shin YY, Yang JW, Park HY, Shin SC, Kwon HK, Kim JM, Sung ES, Park GC, Lee BJ, Kim HS. Human Tonsil-Derived Mesenchymal Stromal Cells Maintain Proliferating and ROS-Regulatory Properties via Stanniocalcin-1. Cells 2020; 9:cells9030636. [PMID: 32155780 PMCID: PMC7140534 DOI: 10.3390/cells9030636] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [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] [Subscribe] [Scholar Register] [Received: 02/02/2020] [Revised: 02/29/2020] [Accepted: 03/04/2020] [Indexed: 02/07/2023] Open
Abstract
Mesenchymal stromal cells (MSCs) from various sources exhibit different potential for stemness and therapeutic abilities. Recently, we reported a unique MSCs from human palatine tonsil (TMSCs) and their superior proliferation capacity compared to MSCs from other sources. However, unique characteristics of each MSC are not yet precisely elucidated. We investigated the role of stanniocalcin-1 (STC1), an anti-oxidative hormone, in the functions of TMSCs. We found that STC1 was highly expressed in TMSC compared with MSCs from bone marrow or adipose tissue. The proliferation, senescence and differentiation of TMSCs were assessed after the inhibition of STC1 expression. STC1 inhibition resulted in a significant decrease in the proliferation of TMSCs and did not affect the differentiation potential. To reveal the anti-oxidative ability of STC1 in TMSCs themselves or against other cell types, the generation of mitochondrial reactive oxygen species (ROS) in TMSC or ROS-mediated production of interleukin (IL)-1β from macrophage-like cells were detected. Interestingly, the basal level of ROS generation in TMSCs was significantly elevated after STC1 inhibition. Moreover, down-regulation of STC1 impaired the inhibitory effect of TMSCs on IL-1β production in macrophages. Taken together, these findings indicate that STC1 is highly expressed in TMSCs and plays a critical role in proliferating and ROS-regulatory abilities.
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Affiliation(s)
- Yoojin Seo
- Department of Life Science in Dentistry, School of Dentistry, Pusan National University, Yangsan 50612, Korea; (Y.S.); (J.-S.A.); (S.-J.O.); (Y.Y.S.); (J.W.Y.)
- Dental and Life Science Institute, Pusan National University, Yangsan 50612, Korea
| | - Tae-Hoon Shin
- Biomedical Research Institute, Pusan National University Hospital, Busan 49241, Korea; (T.-H.S.); (H.Y.P.)
- Translational Stem Cell Biology Branch, National Heart, Lung and Blood Institute, National Institutes of Health, Bethesda, MD 20892, USA
| | - Ji-Su Ahn
- Department of Life Science in Dentistry, School of Dentistry, Pusan National University, Yangsan 50612, Korea; (Y.S.); (J.-S.A.); (S.-J.O.); (Y.Y.S.); (J.W.Y.)
- Dental and Life Science Institute, Pusan National University, Yangsan 50612, Korea
| | - Su-Jeong Oh
- Department of Life Science in Dentistry, School of Dentistry, Pusan National University, Yangsan 50612, Korea; (Y.S.); (J.-S.A.); (S.-J.O.); (Y.Y.S.); (J.W.Y.)
- Dental and Life Science Institute, Pusan National University, Yangsan 50612, Korea
| | - Ye Young Shin
- Department of Life Science in Dentistry, School of Dentistry, Pusan National University, Yangsan 50612, Korea; (Y.S.); (J.-S.A.); (S.-J.O.); (Y.Y.S.); (J.W.Y.)
- Dental and Life Science Institute, Pusan National University, Yangsan 50612, Korea
| | - Ji Won Yang
- Department of Life Science in Dentistry, School of Dentistry, Pusan National University, Yangsan 50612, Korea; (Y.S.); (J.-S.A.); (S.-J.O.); (Y.Y.S.); (J.W.Y.)
- Dental and Life Science Institute, Pusan National University, Yangsan 50612, Korea
| | - Hee Young Park
- Biomedical Research Institute, Pusan National University Hospital, Busan 49241, Korea; (T.-H.S.); (H.Y.P.)
| | - Sung-Chan Shin
- Department of Otorhinolaryngology, College of Medicine, Pusan National University and Biomedical Research Institute, Pusan National University Hospital, Busan 49241, Korea; (S.-C.S.); (H.-K.K.); (J.M.K.)
| | - Hyun-Keun Kwon
- Department of Otorhinolaryngology, College of Medicine, Pusan National University and Biomedical Research Institute, Pusan National University Hospital, Busan 49241, Korea; (S.-C.S.); (H.-K.K.); (J.M.K.)
| | - Ji Min Kim
- Department of Otorhinolaryngology, College of Medicine, Pusan National University and Biomedical Research Institute, Pusan National University Hospital, Busan 49241, Korea; (S.-C.S.); (H.-K.K.); (J.M.K.)
| | - Eui-Suk Sung
- Department of Otorhinolaryngology-Head and Neck Surgery, Biomedical Research Institute, Pusan National University School of Medicine, Yangsan Pusan National University Hospital, Yangsan 50612, Korea;
| | - Gi Cheol Park
- Department of Otolaryngology – Head and Neck Surgery, Samsung Changwon Hospital, Sungkyunkwan University School of Medicine, Changwon 51353, Korea;
| | - Byung-Joo Lee
- Department of Otorhinolaryngology, College of Medicine, Pusan National University and Biomedical Research Institute, Pusan National University Hospital, Busan 49241, Korea; (S.-C.S.); (H.-K.K.); (J.M.K.)
- Correspondence: (B.-J.L.); (H.-S.K.); Tel.: +82-51-240-7675 (B.-J.L.); +82-51-510-8231 (H.-S.K.)
| | - Hyung-Sik Kim
- Department of Life Science in Dentistry, School of Dentistry, Pusan National University, Yangsan 50612, Korea; (Y.S.); (J.-S.A.); (S.-J.O.); (Y.Y.S.); (J.W.Y.)
- Dental and Life Science Institute, Pusan National University, Yangsan 50612, Korea
- Correspondence: (B.-J.L.); (H.-S.K.); Tel.: +82-51-240-7675 (B.-J.L.); +82-51-510-8231 (H.-S.K.)
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Kim JM, Heo HS, Shin SC, Kwon HK, Lee JC, Sung ES, Kim HS, Park GC, Lee BJ. Increased calcium channel in the lamina propria of aging rat. Aging (Albany NY) 2019; 11:8810-8824. [PMID: 31682233 PMCID: PMC6834399 DOI: 10.18632/aging.102284] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2019] [Accepted: 09/05/2019] [Indexed: 11/26/2022]
Abstract
The alterations of the extracellular matrix (ECM) in lamina propria of the vocal folds are important changes that are associated with decreased vibrations and increased stiffness in aging vocal fold. The aim of this study was to investigate the differences in gene expression of lamina propria using next generation sequencing (NGS) in young and aging rats and to identify genes that affect aging-related ECM changes for developing novel therapeutic target molecule. Among the 40 genes suggested in the NGS analysis, voltage-gated calcium channels (VGCC) subunit alpha1 S (CACNA1S), VGCC auxiliary subunit beta 1 (CACNB1), and VGCC auxiliary subunit gamma 1 (CACNG1) were increased in the lamina propria of the old rats compared to the young rats. The synthesis of collagen I and III in hVFFs decreased after si-CACNA1S and verapamil treatment. The expression and activity of matrix metalloproteinases (MMP)-1 and -8 were increased in hVFFs after the treatment of verapamil. However, there was no change in the expression of MMP-2 and -9. These results suggest that some calcium channels may be related with the alteration of aging-related ECM in vocal folds. Calcium channel has promising potential as a novel therapeutic target for the remodeling ECM of aging lamina propria.
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Affiliation(s)
- Ji Min Kim
- Biomedical Research Institute, Pusan National University Hospital, Busan, Republic of Korea
| | - Hyoung-Sam Heo
- Division of Bio-Medical Informatics, Center for Genome Science, Korea National Institute of Health, Korea Centers for Disease Control and Prevention, Cheongju-si, Republic of Korea
| | - Sung-Chan Shin
- Department of Otorhinolaryngology-Head and Neck Surgery, Pusan National University School of Medicine, Pusan National University, Busan, Republic of Korea
| | - Hyun-Keun Kwon
- Department of Otorhinolaryngology-Head and Neck Surgery, Pusan National University School of Medicine, Pusan National University, Busan, Republic of Korea
| | - Jin-Choon Lee
- , Department of Otorhinolaryngology-Head and Neck Surgery, Pusan National University School of Medicine and Biomedical Research Institute, Pusan National University Yangsan Hospital, Yangsan, Republic of Korea
| | - Eui-Suk Sung
- , Department of Otorhinolaryngology-Head and Neck Surgery, Pusan National University School of Medicine and Biomedical Research Institute, Pusan National University Yangsan Hospital, Yangsan, Republic of Korea
| | - Hyung-Sik Kim
- Department of Life Science in Dentistry, school of Dentistry, Pusan National University, Yangsan, Republic of Korea.,Institute for Translational Dental Science, Pusan National University, Yangsan, Republic of Korea
| | - Gi Cheol Park
- Department of Otolaryngology-Head and Neck Surgery, Samsung Changwon Hospital, Sungkyunkwan University School of Medicine, Changwon, Republic of Korea
| | - Byung-Joo Lee
- Biomedical Research Institute, Pusan National University Hospital, Busan, Republic of Korea.,Department of Otorhinolaryngology-Head and Neck Surgery, Pusan National University School of Medicine, Pusan National University, Busan, Republic of Korea
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9
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Sung ES, Lee JC, Shin SC, Kwon HK, Na HS, Park DH, Choi SW, Ro JH, Lee BJ. Development of a Novel Intraoperative Neuromonitoring System Using an Accelerometer Sensor in Thyroid Surgery: A Porcine Model Study. Clin Exp Otorhinolaryngol 2019; 12:420-426. [PMID: 31195791 PMCID: PMC6787476 DOI: 10.21053/ceo.2019.00423] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2019] [Accepted: 05/20/2019] [Indexed: 11/22/2022] Open
Abstract
Objectives. The sensitivity and positive predictive value of widely used intraoperative neuromonitoring (IONM) using electromyography (EMG) of the vocalis muscle in thyroid surgery are controversial. Thus, we developed a novel IONM system with an accelerometer sensor that uses the piezoelectric effect instead of EMG to detect laryngeal twitching. The objective of this study was to evaluate the feasibility and safety of this novel IONM system during thyroid surgery in a porcine model. Methods. We developed an accelerometer sensor that uses the piezoelectric effect to measure laryngeal twitching in three dimensions. This novel accelerometer sensor was placed in the anterior neck skin (transcutaneous) or postcricoid area. Stimulus thresholds, amplitude, and latency of laryngeal twitching measured using the accelerometer sensor were compared to those measured through EMG of the vocalis muscle. Results. The amplitudes of the accelerometer sensor at the anterior neck and postcricoid area were significantly lower than those of EMG because of differences in the measurement method used to evaluate laryngeal movement. However, no significant differences in stimulus thresholds between the EMG endotracheal tube and transcutaneous or postcricoid accelerometer sensors were observed. Conclusion. Accelerometer sensors located at the anterior neck or postcricoid area were able to identify laryngeal twitching. The stimulus intensity measured with these sensors was equivalent to that from conventional vocalis EMG. Our novel IONM system with an accelerometer sensor that checks changes in surface acceleration can be an alternative to EMG of the vocalis muscle for IONM in the future.
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Affiliation(s)
- Eui-Suk Sung
- Department of Otolaryngology-Head and Neck Surgery, Research Institute for Convergence of Biomedical Science and Technology, Pusan National University Yangsan Hospital, Pusan National University College of Medicine, Yangsan, Korea
| | - Jin-Choon Lee
- Department of Otolaryngology-Head and Neck Surgery, Research Institute for Convergence of Biomedical Science and Technology, Pusan National University Yangsan Hospital, Pusan National University College of Medicine, Yangsan, Korea
| | - Sung-Chan Shin
- Department of Otolaryngology-Head and Neck Surgery, Medical Research Institute, Pusan National University Hospital, Pusan National University College of Medicine, Busan, Korea
| | - Hyun-Keun Kwon
- Department of Otolaryngology-Head and Neck Surgery, Medical Research Institute, Pusan National University Hospital, Pusan National University College of Medicine, Busan, Korea
| | - Han-Seul Na
- Department of Otolaryngology-Head and Neck Surgery, Medical Research Institute, Pusan National University Hospital, Pusan National University College of Medicine, Busan, Korea
| | - Da-Hee Park
- Department of Otolaryngology-Head and Neck Surgery, Research Institute for Convergence of Biomedical Science and Technology, Pusan National University Yangsan Hospital, Pusan National University College of Medicine, Yangsan, Korea
| | - Seong-Wook Choi
- Department of Otolaryngology-Head and Neck Surgery, Research Institute for Convergence of Biomedical Science and Technology, Pusan National University Yangsan Hospital, Pusan National University College of Medicine, Yangsan, Korea
| | - Jung-Hoon Ro
- Department of Biomedical Engineering, Pusan National University Hospital, Busan, Korea
| | - Byung-Joo Lee
- Department of Otolaryngology-Head and Neck Surgery, Medical Research Institute, Pusan National University Hospital, Pusan National University College of Medicine, Busan, Korea
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Abstract
This in vitro study examined the utility of comparing red fluorescence between active and inactive caries lesions and investigated whether changes in red fluorescence and fluorescence loss are influenced by lesion activity following remineralization. Sixty-two noncavitated smooth surface caries lesions on extracted human teeth were classified into active or inactive lesions using the Nyvad system prior to a 12-day pH-cycling procedure. Quantitative light-induced fluorescence-digital images were used to measure fluorescence parameters before and after pH cycling. At baseline, the intensity (ΔR) and area (AΔR) of red fluorescence were 1.5- and 2.2-fold higher in active lesions than in inactive lesions (p<0.05). The ratio of AΔR to lesion area was associated with classification of active lesions (odds ratio = 1.031; 95% confidence interval = 1.005-1.058). After pH cycling, the active lesions showed about 2- and 8-fold greater reductions in the median values of AΔR and fluorescence loss related to lesion volume (ΔQ) compared with inactive lesions (p<0.05). In conclusion, red fluorescence differs depending on lesion activity, and the red fluorescence area and lesion volume change following remineralization. The results suggest that measuring red fluorescence may be a useful way of objectively evaluating lesion activity of smooth surface lesions.
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Kwon DH, Kwon HK, Kim DH, Yang CY. Larval species composition and genetic structures of Carposina sasakii, Grapholita dimorpha, and Grapholita molesta from Korea. Bull Entomol Res 2018; 108:241-252. [PMID: 28758607 DOI: 10.1017/s0007485317000694] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Rapid determination of the larval species composition and understanding of their genetic structure is important to establish the appropriate management system for multiple species infesting in fruits. We established accurate and rapid diagnostic methods based on multiplex polymerase chain reaction (PCR) diagnostic techniques to discriminate the three major lepidopteran species in orchard, Carposina sasakii, Grapholita dimorpha, and Grapholita molesta. Each species was identified by amplifying species-specific PCR products (375 bp for C. sasakii, 125 and 234 bp for G. dimorpha, and 125 bp for G. molesta). Based on species composition analysis from six types of infested fruits, G. dimorpha constituted the highest proportion (47.8%), followed by 35.2 and 13.5% for G. molesta and C. sasakii, respectively. Interestingly, high prevalence was found in G. dimorpha and G. molesta for plum and peach, respectively. Based on genetic diversity analysis, the three insect species exhibited moderate or high haplotype diversity and low nucleotide diversity, ranging from 0.319 to 0.699 and 0.0006 to 0.0045, respectively. Demographic expansion was not detected according to either a neutrality test or mismatch distribution analysis. Moreover, no significant genetic structure corresponding to province, host plant, fruit type, or collection period was observed. These results suggest that the population of each species would have high dispersal ability following fruit-generating periods via intrinsic host adaptation ability regardless of the spatial and temporal conditions. Determination of larval composition on fruit is valuable for establishing appropriate management systems that take the species into consideration; additionally, population genetic approaches can be utilized to understand the effects of environmental factors (province, host fruit, fruit type, etc.) on population structures.
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Affiliation(s)
- D H Kwon
- Research Institute of Agriculture and Life Science, Seoul National University,Seoul 08826,Republic of Korea
| | - H K Kwon
- Horticultural and Herbal Crop Environment Division,National Institute of Horticultural and Herbal Science, Rural Development Administration,Jeollabuk-do 55365,Republic of Korea
| | - D H Kim
- Horticultural and Herbal Crop Environment Division,National Institute of Horticultural and Herbal Science, Rural Development Administration,Jeollabuk-do 55365,Republic of Korea
| | - C Y Yang
- Horticultural and Herbal Crop Environment Division,National Institute of Horticultural and Herbal Science, Rural Development Administration,Jeollabuk-do 55365,Republic of Korea
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Shin SC, Park HY, Shin N, Jung DW, Kwon HK, Kim JM, Wang SG, Lee JC, Sung ES, Park GC, Lee BJ. Evaluation of decellularized xenogenic porcine auricular cartilage as a novel biocompatible filler. J Biomed Mater Res B Appl Biomater 2018; 106:2708-2715. [DOI: 10.1002/jbm.b.34088] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2017] [Revised: 11/24/2017] [Accepted: 01/08/2018] [Indexed: 11/10/2022]
Affiliation(s)
- Sung-Chan Shin
- Department of Otorhinolaryngology-Head and Neck Surgery; Pusan National University School of Medicine and Biomedical Research Institute, Pusan National University Hospital; Pusan Republic of Korea
| | - Hee Young Park
- Department of Otorhinolaryngology-Head and Neck Surgery; Pusan National University School of Medicine and Biomedical Research Institute, Pusan National University Hospital; Pusan Republic of Korea
| | - Nari Shin
- Department of Pathology; Hanmaeum Changwon Hospital; Changwon Gyeongsangnamdo Republic of Korea
- Department of Pathology; Pusan National University School of Medicine and Biomedical Research Institute, Pusan National University Yangsan Hospital; Yangsan Gyeongsangnamdo Republic of Korea
| | - Da-Woon Jung
- Department of Otorhinolaryngology-Head and Neck Surgery; Pusan National University School of Medicine and Biomedical Research Institute, Pusan National University Hospital; Pusan Republic of Korea
| | - Hyun-Keun Kwon
- Department of Otorhinolaryngology-Head and Neck Surgery; Pusan National University School of Medicine and Biomedical Research Institute, Pusan National University Hospital; Pusan Republic of Korea
| | - Ji Min Kim
- Department of Otorhinolaryngology-Head and Neck Surgery; Pusan National University School of Medicine and Biomedical Research Institute, Pusan National University Hospital; Pusan Republic of Korea
| | - Soo-Geun Wang
- Department of Otorhinolaryngology-Head and Neck Surgery; Pusan National University School of Medicine and Biomedical Research Institute, Pusan National University Hospital; Pusan Republic of Korea
| | - Jin-Choon Lee
- Department of Otorhinolaryngology-Head and Neck Surgery; Pusan National University School of Medicine and Biomedical Research Institute, Pusan National University Yangsan Hospital; Yangsan Gyeongsangnamdo Republic of Korea
| | - Eui-Suk Sung
- Department of Otorhinolaryngology-Head and Neck Surgery; Pusan National University School of Medicine and Biomedical Research Institute, Pusan National University Yangsan Hospital; Yangsan Gyeongsangnamdo Republic of Korea
| | - Gi Cheol Park
- Department of Otorhinolaryngology-Head and Neck Surgery; Sungkyunkwan University School of Medicine, Samsung Changwon Hospital Changwon; Gyeongsangnamdo Republic of Korea
| | - Byung-Joo Lee
- Department of Otorhinolaryngology-Head and Neck Surgery; Pusan National University School of Medicine and Biomedical Research Institute, Pusan National University Hospital; Pusan Republic of Korea
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Lee KT, Park JH, Kwon SJ, Kwon HK, Kyhm J, Kwak KW, Jang HS, Kim SY, Han JS, Lee SH, Shin DH, Ko H, Han IK, Ju BK, Kwon SH, Ko DH. Simultaneous enhancement of upconversion and downshifting luminescence via plasmonic structure. Nano Lett 2015; 15:2491-2497. [PMID: 25756859 DOI: 10.1021/nl5049803] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
We describe a metal nanodisk-insulator-metal (MIM) structure that enhances lanthanide-based upconversion (UC) and downshifting (DS) simultaneously. The structure was fabricated using a nanotransfer printing method that facilitates large-area applications of nanostructures for optoelectronic devices. The proposed MIM structure is a promising way to harness the entire solar spectrum by converting both ultraviolet and near-infrared to visible light concurrently through resonant-mode excitation. The overall photoluminescence enhancements of the UC and DS were 174- and 29-fold, respectively.
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Affiliation(s)
- Kyu-Tae Lee
- †Korea Institute of Science and Technology, Hwarang-ro, 14-gil, Seongbuk-gu, Seoul 136-791, Republic of Korea
- §School of Electrical Engineering, Korea University, Anam-ro, Seongbuk-gu, Seoul 136-713, Republic of Korea
| | - Jong-Hyun Park
- †Korea Institute of Science and Technology, Hwarang-ro, 14-gil, Seongbuk-gu, Seoul 136-791, Republic of Korea
- ⊥Department of Chemistry, Korea University, Anam-ro, Seongbuk-gu, Seoul 136-701, Republic of Korea
| | - S Joon Kwon
- †Korea Institute of Science and Technology, Hwarang-ro, 14-gil, Seongbuk-gu, Seoul 136-791, Republic of Korea
| | - Hyun-Keun Kwon
- †Korea Institute of Science and Technology, Hwarang-ro, 14-gil, Seongbuk-gu, Seoul 136-791, Republic of Korea
- §School of Electrical Engineering, Korea University, Anam-ro, Seongbuk-gu, Seoul 136-713, Republic of Korea
| | - Jihoon Kyhm
- †Korea Institute of Science and Technology, Hwarang-ro, 14-gil, Seongbuk-gu, Seoul 136-791, Republic of Korea
| | | | - Ho Seong Jang
- †Korea Institute of Science and Technology, Hwarang-ro, 14-gil, Seongbuk-gu, Seoul 136-791, Republic of Korea
| | - Su Yeon Kim
- †Korea Institute of Science and Technology, Hwarang-ro, 14-gil, Seongbuk-gu, Seoul 136-791, Republic of Korea
| | - Joon Soo Han
- †Korea Institute of Science and Technology, Hwarang-ro, 14-gil, Seongbuk-gu, Seoul 136-791, Republic of Korea
| | - Sung-Hwan Lee
- †Korea Institute of Science and Technology, Hwarang-ro, 14-gil, Seongbuk-gu, Seoul 136-791, Republic of Korea
| | - Dong-Hun Shin
- †Korea Institute of Science and Technology, Hwarang-ro, 14-gil, Seongbuk-gu, Seoul 136-791, Republic of Korea
| | - Hyungduk Ko
- †Korea Institute of Science and Technology, Hwarang-ro, 14-gil, Seongbuk-gu, Seoul 136-791, Republic of Korea
| | - Il-Ki Han
- †Korea Institute of Science and Technology, Hwarang-ro, 14-gil, Seongbuk-gu, Seoul 136-791, Republic of Korea
| | - Byeong-Kwon Ju
- §School of Electrical Engineering, Korea University, Anam-ro, Seongbuk-gu, Seoul 136-713, Republic of Korea
| | | | - Doo-Hyun Ko
- †Korea Institute of Science and Technology, Hwarang-ro, 14-gil, Seongbuk-gu, Seoul 136-791, Republic of Korea
- ‡Department of Applied Chemistry, Kyung Hee University, Yongin, Gyeonggi 130-701, Korea
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Kim YJ, Kwon HK, Lee JM, Kim YJ, Kim HJ, Jung NY, Kim ST, Lee KH, Na DL, Seo SW. White matter microstructural changes in pure Alzheimer's disease and subcortical vascular dementia. Eur J Neurol 2015; 22:709-16. [PMID: 25603760 DOI: 10.1111/ene.12645] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [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: 09/11/2014] [Accepted: 11/12/2014] [Indexed: 11/28/2022]
Abstract
BACKGROUND AND PURPOSE Recent studies have demonstrated that Alzheimer's disease (AD) and subcortical vascular dementia (SVaD) have white matter (WM) microstructural changes. However, previous studies on AD and SVaD rarely eliminated the confounding effects of patients with mixed Alzheimer's and cerebrovascular disease pathologies. Therefore, our aim was to evaluate the divergent topography of WM microstructural changes in patients with pure AD and SVaD. METHODS Patients who were clinically diagnosed with AD and SVaD were prospectively recruited. Forty AD patients who were Pittsburgh compound B (PiB) positive [PiB(+) AD] without WM hyperintensities and 32 SVaD patients who were PiB negative [PiB(-) SVaD] were chosen. Fifty-six cognitively normal individuals were also recruited (NC). Tract-based spatial statistics of diffuse tensor imaging were used to compare patterns of fractional anisotropy (FA) and mean diffusivity (MD). RESULTS Compared with the NC group, the PiB(+) AD group showed decreased FA in the bilateral frontal, temporal and parietal WM regions and the genu and splenium of the corpus callosum as well as increased MD in the left frontal and temporal WM region. PiB(-) SVaD patients showed decreased FA and increased MD in all WM regions. Direct comparison between PiB(+) AD and PiB(-) SVaD groups showed that the PiB(-) SVaD group had decreased FA across all WM regions and increased MD in all WM regions except occipital regions. CONCLUSION Our findings suggest that pure AD and pure SVaD have divergent topography of WM microstructural changes including normal appearing WM.
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Affiliation(s)
- Y J Kim
- Department of Neurology, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea; Neuroscience Center, Samsung Medical Center, Seoul, Korea
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Kim Y, Lee JH, Cho S, Kwon Y, In I, Lee J, You NH, Reichmanis E, Ko H, Lee KT, Kwon HK, Ko DH, Yang H, Park B. Additive-free hollow-structured Co3O4 nanoparticle Li-ion battery: the origins of irreversible capacity loss. ACS Nano 2014; 8:6701-6712. [PMID: 24895838 DOI: 10.1021/nn500218m] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Origins of the irreversible capacity loss were addressed through probing changes in the electronic and structural properties of hollow-structured Co3O4 nanoparticles (NPs) during lithiation and delithiation using electrochemical Co3O4 transistor devices that function as a Co3O4 Li-ion battery. Additive-free Co3O4 NPs were assembled into a Li-ion battery, allowing us to isolate and explore the effects of the Co and Li2O formation/decomposition conversion reactions on the electrical and structural degradation within Co3O4 NP films. NP films ranging between a single monolayer and multilayered film hundreds of nanometers thick prepared with blade-coating and electrophoretic deposition methods, respectively, were embedded in the transistor devices for in situ conduction measurements as a function of battery cycles. During battery operation, the electronic and structural properties of Co3O4 NP films in the bulk, Co3O4/electrolyte, and Co3O4/current collector interfaces were spatially mapped to address the origin of the initial irreversible capacity loss from the first lithiation process. Further, change in carrier injection/extraction between the current collector and the Co3O4 NPs was explored using a modified electrochemical transistor device with multiple voltage probes along the electrical channel.
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Affiliation(s)
- Youngjun Kim
- Department of Materials Science and Engineering, Hongik University 72-1, Sangsu-dong, Mapo-gu, Seoul 121-791, Korea
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Kim YS, Kwon HK, Kim BI. Effect of nano-carbonate apatite to prevent re-stain after dental bleaching in vitro. J Dent 2011; 39:636-42. [PMID: 21763391 DOI: 10.1016/j.jdent.2011.07.002] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2011] [Revised: 06/30/2011] [Accepted: 07/01/2011] [Indexed: 10/18/2022] Open
Abstract
OBJECTIVES This study examined the effect of nano-carbonate apatite (n-CAP) to prevent re-staining and the change of enamel surface after dental bleaching in vitro. METHODS Twenty-four bovine specimens were bleached for 2 weeks with 10% carbamide peroxide (CP). After bleaching, the specimens were divided into the following four groups: distilled and deionized water (DDW, negative control), 10% n-CAP, NaF (positive control) and casein phosphopeptide-amorphous calcium phosphate (CPP-ACP, positive control). Each group was subjected to pH cycling for 7 days. The specimens were treated for 4 min 3 times per day and re-staining was induced naturally by artificial saliva in the remineralization process. After pH cycling, the changes in colour were evaluated with spectrophotometry and scanning electron microscopy (SEM). The difference in colour between before and after pH cycling was evaluated using an ANOVA and Tukey test. RESULTS After pH cycling, the colour difference of n-CAP group was significantly lower than that of the DDW and CPP-ACP groups (p<0.05). SEM showed that n-CAP particles were deposited regularly on the damaged surface compared to the other groups. CONCLUSION 10% n-CAP could significantly maintain the initial colour and protect the damaged enamel structure after bleaching.
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Affiliation(s)
- Y S Kim
- Department of Preventive Dentistry and Public Oral Health, Research Center for Orofacial Hard Tissue Regeneration Brain Korea 21 project, College of Dentistry, Yonsei University, Seoul, Republic of Korea
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Min JH, Kwon HK, Kim BI. The addition of nano-sized hydroxyapatite to a sports drink to inhibit dental erosion: in vitro study using bovine enamel. J Dent 2011; 39:629-35. [PMID: 21763390 DOI: 10.1016/j.jdent.2011.07.001] [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] [Received: 02/01/2011] [Revised: 06/30/2011] [Accepted: 07/01/2011] [Indexed: 11/25/2022] Open
Abstract
OBJECTIVES This study examined the dental erosion and demineralization potential of a sports drink containing nano-sized hydroxyapatite (nano-HA) as an additive. METHODS The experimental solutions were Powerade (PA) alone and PA with 0.05%, 0.10%, and 0.25% nano-HA. The pH, titratable acidity, and calcium and phosphate content of each solution were analysed, and the degree of saturation with respect to the dental enamel (DS(En)) was obtained. Twelve sound bovine enamel specimens for each group were treated in accordance with the pH-cycling schedule which had 60min treatment with experimental solution per day for 7 days. The erosion potential was determined from the changes in surface micro hardness (SMH), the depths of erosion and demineralized layer using confocal laser scanning microscopy (CLSM), and the morphological changes to the tooth surface were examined with scanning electron microscopy (SEM) after pH-cycling. RESULTS pH and DS(En) increased with increasing nano-HA concentration in the drinks, whereas the titratable acidity decreased. There were significant differences in the SMH between the PA alone and >0.10% nano-HA groups (p<0.001). Although the PA alone group showed a pronounced erosion depth, CLSM showed no erosion depth in 0.25% nano-HA group. SEM showed an intact surface with increasing nano-HA concentration in the drinks. In conclusion, dental erosion was effectively prevented with increase of adding concentration of nano-HA, and a sports drink containing 0.25% nano-HA might prevent dental erosion.
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Affiliation(s)
- J H Min
- Department of Preventive Dentistry and Public Oral Health, Research Center for Orofacial Hard Tissue Regeneration, College of Dentistry, Yonsei University, Seoul, Republic of Korea
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Abstract
OBJECTIVES This study investigated the relationship between dental caries and the salivary Streptococcus mutans specific antibodies in Down syndrome children. METHODS Nineteen children with Down syndrome and 41 normal children aged 8-17 years were selected. The oral health status (dental caries experience, pit and fissure depth, dental arch space, and Simplified Oral Hygiene Index) was examined and unstimulated saliva was collected. The total salivary immunoglobulin A (IgA) and S. mutans specific salivary IgA concentrations were measured using ELISA. RESULTS The decayed and filled surface index of the deciduous teeth, and the decayed, missing, and filled surfaces index of the permanent teeth in Down syndrome children were significantly lower compared to those in normal children. The salivary S. mutans (serotype g and c) specific IgA concentrations were significantly higher in Down syndrome children than in the normal children. There was no significant difference in the tooth characteristics and oral hygiene between the two groups. CONCLUSIONS The low caries prevalence in Down syndrome children appears to be due to immune protection caused by the elevated salivary S. mutans specific IgA concentrations.
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Affiliation(s)
- S R Lee
- Department of Preventive Dentistry and Public Oral Health, College of Dentistry, Yonsei University, Seoul, Korea
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Cho BK, Kwon HK, Kim KS, Kim YN, Caplan DJ. A two-year longitudinal study of dental caries in permanent first molars of Korean elementary schoolchildren. J Public Health Dent 2001; 61:120-2. [PMID: 11474915 DOI: 10.1111/j.1752-7325.2001.tb03376.x] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
OBJECTIVE This longitudinal study investigated dental caries increment in permanent first molars of Korean elementary schoolchildren. METHODS A convenience sample of 722 children aged 7-9 years attending one urban elementary school was examined at baseline, with follow-up examinations at one and two years. Coronal surfaces of permanent first molars were scored with regard to caries experience and sealant status. RESULTS Among sound occlusal surfaces at baseline, 21 percent of upper and 25 percent of lower surfaces developed caries during the two-year interval. In teeth that erupted between baseline and the first follow-up exam, over 10 percent of occlusal surfaces developed caries. Pit and fissure caries accounted for 93 percent of all new carious surfaces, while sealants had been placed on 16 percent of occlusal surfaces during the study. CONCLUSIONS Recognizing the limitations of this convenience sample, dental sealants should be used more widely in this Korean population, and should be applied soon after tooth eruption.
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Affiliation(s)
- B K Cho
- Department of Preventive Dentistry and Public Oral Health, College of Dentistry, Yonsei University, Seoul, Korea
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Abstract
It is not well known how the nonoperated contralateral hand behaves in bilateral carpal tunnel syndrome (CTS). The postoperative clinical course of the nonoperated contralateral hand in unilateral CTS is not well documented either. Of 324 CTS patients, the authors studied 37 who had carpal tunnel release on one hand only to evaluate the postoperative outcome of the nonoperated contralateral hand. The other 287 patients had operations on both hands. Seven patients were excluded because of missing data or because they could not be contacted. All 324 patients were subject to clinical and electrodiagnostic studies on both hands. The patients were divided into three groups. Group I was composed of patients who had bilateral CTS, diagnosed clinically and electrophysiologically, but who had surgery done only on the hand with the most pronounced symptoms. The patients in group II showed symptoms of CTS in one hand only. However, the opposite hand was diagnosed with subclinical CTS: Electrodiagnostic studies showed involvement of the median nerve, but without symptoms. Group III was composed of true unilateral CTS patients, diagnosed by symptoms and electrodiagnostic study. The results of the electrodiagnosis were categorized according to the severity of median nerve damage (mild, moderate, severe). The outcome and postoperative clinical course of the nonoperated contralateral hand were evaluated by electromyography and telephone survey. This method of survey was used because of the vast spread of patients throughout the country. Within 1 year, all 30 operated hands showed significant improvement, 20 of which belonged to group I. Regarding progress of the nonoperated contralateral hand, 10 patients showed improvement of one grade whereas 5 patients showed three grades of improvement. In another 5 patients there was no change whatsoever. In addition, from groups II and III there were 5 patients who showed no change in the nonoperated hand. The postoperative electromyographic findings of the nonoperated contralateral hand was not commensurate with the symptoms. However, regardless of electromyographic results, the nonoperated contralateral hand showed significant improvement (p < 0.0001). Patients with unilateral CTS did not experience any symptom development in the nonoperated contralateral hand.
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Affiliation(s)
- E S Yoon
- Department of Plastic and Reconstructive Surgery, Ansan Hospital, College of Medicine, Korea University, Seoul, Korea
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21
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Abstract
A 31-year-old woman, with a history of previous cesarean section and right oophorectomy, was admitted for a repeat cesarean section. After the commencement of surgery uterine torsion was diagnosed because of the anterior position of the remaining left ovary and tube, the absence of normal uterovesical peritoneum, and extremely engorged vessels in the lower uterine surface. Posterior classical hysterotomy was performed and a healthy female baby was delivered. Following delivery of the baby and suturing the incision site of the uterus, the contracted uterus was detorted and put back in the pelvic cavity. Extreme uterine torsion of 180 degrees at term is a rare obstetric event. This paper presents a case of uterine torsion at full term pregnancy in which the delivery and repositioning of the uterus was successful.
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Affiliation(s)
- S K Kim
- Department of Obstetrics and Gynecology, Yonsei University College of Medicine, Seoul, Korea.
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22
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Han JW, Ahn SH, Park SH, Wang SY, Bae GU, Seo DW, Kwon HK, Hong S, Lee HY, Lee YW, Lee HW. Apicidin, a histone deacetylase inhibitor, inhibits proliferation of tumor cells via induction of p21WAF1/Cip1 and gelsolin. Cancer Res 2000; 60:6068-74. [PMID: 11085529] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/18/2023]
Abstract
Apicidin [cyclo(N-O-methyl-L-tryptophanyl-L-isoleucinyl-D-pipecolinyl -L-2-amino-8-oxodecanoyl)] is a fungal metabolite shown to exhibit antiparasitic activity by the inhibition of histone deacetylase (HDAC). In this study, we evaluated apicidin as a potential antiproliferative agent. Apicidin showed a broad spectrum of antiproliferative activity against various cancer cell lines, although with differential sensitivity. The antiproliferative activity of apicidin on HeLa cells was accompanied by morphological changes, cell cycle arrest at G1 phase, and accumulation of hyperacetylated histone H4 in vivo as well as inhibition of partially purified HDAC in vitro. In addition, apicidin induced selective changes in the expression of p21WAF1/Cip1 and gelsolin, which control the cell cycle and cell morphology, respectively. Consistent with increased induction of p21WAF1/Cip1, phosphorylation of Rb protein was markedly decreased, indicating the inhibition of cyclin-dependent kinases, which became bound to p21WAF1/Cip1. The effects of apicidin on cell morphology, expression of gelsolin, and HDAC1 activity in vivo and in vitro appeared to be irreversible, because withdrawal of apicidin did not reverse those effects, whereas the induction of p21WAF1/Cip1 by apicidin was reversible. Taken together, the results suggest that induction of histone hyperacetylation by apicidin is responsible for the antiproliferative activity through selective induction of genes that play important roles in the cell cycle and cell morphology.
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Affiliation(s)
- J W Han
- Department of Biochemistry and Molecular Biology, College of Pharmacy, Sungkyunkwan University, Suwon, Korea
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23
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Kim KY, Kwon HK, Kwon SY, Lee HS, Hur Y, Bang JW, Choi KS, Kwak SS. Differential expression of four sweet potato peroxidase genes in response to abscisic acid and ethephon. Phytochemistry 2000; 54:19-22. [PMID: 10846741 DOI: 10.1016/s0031-9422(00)00014-5] [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] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Expression of four peroxidase (POD) genes, three anionic PODs (swpa1, swpa2 and swpa3), and one neutral POD (swpn1) isolated from suspension cultures of sweet potato (Ipomoea batatas) were analyzed by measuring the accumulation of transcripts in suspension cultured cells and leaves of sweet potato in response to the stress-related plant hormones abscisic acid (ABA) and ethephon (an ethylene generating chemical). The four genes responded differently to ABA (0.1 mM) and ethephon (0.1 mM) in cultured cells and leaves. In suspension cultures, ABA reduced the expression levels of swpa1, swpa2, and swpn1, but did not affect the level of swpa3. Ethephon strongly increased expression levels of swpa3 and swpn1, and slightly increased the level of swpa1. The expression level of swpa2 was reduced. Expression levels in intact leaves, however, were significantly changed by this treatment. Expression of the swpa1 and swpa2 genes was induced 15 min after ABA treatment, followed by a decrease to a basal level after 3 h. A strong re-expression occurred after 12 h. Expression of the swpa3 and swpn1 genes occurred from 3 to 24 h after treatment. All four genes were differentially expressed 12 h after ethephon treatment. The swpa2 gene was strongly expressed immediately after ethephon treatment. The results indicate that each POD gene is differentially regulated by ABA and ethylene in whole plants and in cultured cells in vitro.
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Affiliation(s)
- K Y Kim
- Plant Cell Biotechnology Laboratory, Korea Research Institute of Bioscience and Biotechnology (KRIBB), Yusong, Taejon, South Korea
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24
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Kwon HK, Owen DG, Davidson WM. A case of supernumerary teeth in the premaxilla, maxillary cuspid, and mandibular premolar regions. MSDA J 1999; 41:105-8. [PMID: 10597162] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/14/2023]
Abstract
A case of several developing supernumerary teeth is reported. A seven-year-old African-American boy presented with retained primary maxillary central incisors, two impacted mesiodens, and unerupted permanent maxillary central incisors. A dentigerous cyst was removed at the time of surgical removal of the mesiodens. Approximately fourteen months post-extraction, a new panoramic radiograph showed the presence of six previously unidentified developing and unerupted supernumerary teeth, one on each of the maxillary cuspid areas and two on the mandibular premolar regions bilaterally. Practitioners should be aware that supernumerary teeth may develop late. Thus, periodic reevaluation with appropriate radiographs is indicated, especially in patients who have presented with supernumerary teeth.
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Affiliation(s)
- H K Kwon
- Baltimore College of Dental Surgery, Dental School, University of Maryland, USA
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25
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Abstract
We investigated a possible role of reactive oxygen species (ROS) in p70(S6k) activation, which plays an important role in the progression of cells from G(0)/G(1) to S phase of the cell cycle by translational up-regulation of a family of mRNA transcripts that encode for components of the protein synthetic machinery. Treatment of mouse epidermal cell JB6 with H(2)O(2) generated extracellularly by glucose/glucose oxidase led to the activation of p70(S6k) and p90(Rsk) and to phosphorylation of p42(MAPK)/p44(MAPK). The activation of p70(S6k) and p90(Rsk) was dose-dependent and transient, maximal activities being in extracts treated for 15 and 30 min, respectively. Further characterization of ROS-induced activation of p70(S6k) using specific inhibitors for p70(S6k) signaling pathway, rapamycin, and wortmannin revealed that ROS acted upstream of the rapamycin-sensitive component FRAP/RAFT and wortmannin-sensitive component phosphatidylinositol 3-kinase, because both inhibitors caused the inhibition of ROS-induced p70(S6k) activity. In addition, Ca(2+) chelation also inhibited ROS-induced activation of p70(S6k), indicating that Ca(2+) is a mediator of p70(S6k) activation by ROS. However, down-regulation of 12-O-tetradecanoylphorbol-13-acetate (TPA)-responsive protein kinase C (PKC) by chronic pretreatment with TPA or a specific PKC inhibitor Ro-31-8220 did not block the activation of p70(S6k) by ROS, indicating that the activation of TPA-responsive PKC was not required for stimulation of p70(S6k) activity by H(2)O(2) in JB6 cells. Exposure of JB6 cells to platelet-derived growth factor or epidermal growth factor led to a rapid increase in H(2)O(2), phosphorylation, and activation of p70(S6k), which were antagonized by the pretreatment of catalase. Taken together, the results suggest that ROS act as a messenger in growth factor-induced p70(S6k) signaling pathway.
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Affiliation(s)
- G U Bae
- Department of Biochemistry, College of Pharmacy, Sungkyunkwan University, Suwon 440-746, Korea
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26
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Abstract
It has been reported that the quantity of fibrillation potentials (FP) decreases with drop in the intramuscular temperature. However, the quantitative measurement of the FP with intramuscular temperature changes has not been reported. Under anesthesia of intraperitoneal sodium pentobarbital, the sciatic nerve of 6 rats (Sprague-Dawley) was surgically isolated. A 1-cm segment was excised after tying the proximal and distal ends of the nerve segment. A concentric needle electrode and thermometer needle probe were inserted approximately 1-cm apart into the posterior tibial muscles 3 to 4 days after the nerve segment excision. Before and during cooling the muscles with ice, FPs were evoked and printed on paper recording for later analysis. Visually recognizable potentials (30 microV or above) in each printed tracing with temperature changes (range, 37 degrees C to 15 degrees C) were manually counted. A positive linear correlation was found between the intramuscular temperature changes and the quantity of FPs. The recording of FP completely ceased at about 20 degrees C below baseline temperature. In this study, we have successfully semiquantified fibrillation potentials in a wide range of intramuscular temperature changes.
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Affiliation(s)
- H J Lee
- Department of Rehabilitation Medicine, Korea University College of Medicine, Anam Hospital, Sungbook-gu, Seoul, Korea
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27
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Abstract
This study was designed to investigate the relationship between nutritional intake and caries experience of junior high school students. The sample consisted of 295 boys and 356 girls in Kangwha county. Dependent variables were total caries experience, occlusal surface caries experience, smooth surface caries experience and DMFS score (Decayed, Missing, Filling Tooth Surface score). Independent variables such as pit and fissure retentiveness of first molars, oral hygiene status, intraoral acidogenicity were also measured by dentists. Other independent variables such as toothbrushing habits, socioeconomic conditions, between-meal eating habits, and daily nutritional intake were determined during an interview. Univariate and multivariate analysis was performed to evaluate how nutritional intake influences caries experience. The results were as follows: 1. The most influential factor on dental caries experience was pit and fissure retentiveness. 2. Dietary fiber and potassium were the significant nutritional factors on total caries experience and occlusal caries experience, and niacin was the significant nutritional factor on smooth surface caries. 3. DMFS score was positively associated with the daily amount of carbohydrate and niacin intake, and negatively associated with total energy intake. The above results suggested that pit and fissure retentiveness was the most influential factor on caries experience. However, in this study, the intake of potassium and niacin was identified to influence the caries experience in addition to confirming the well-known relationship between fiber and carbohydrate intake.
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Affiliation(s)
- H K Kwon
- Department of Preventive Dentistry & Public Oral Health, College of Dentistry, Seoul, Korea
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