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Lim EJ, Jeong HS, Kim KJ. Posterior deltoid-sparing approach for displaced inferior or posterior glenoid fossa fractures: technical note and case series. Sci Rep 2024; 14:6500. [PMID: 38499695 PMCID: PMC10948851 DOI: 10.1038/s41598-024-56974-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2021] [Accepted: 03/13/2024] [Indexed: 03/20/2024] Open
Abstract
Scapular surgery has usually been performed through the posterior Judet approach. This approach allows access to the entire posterior scapular body, but causes significant soft tissue damage and detaches the deltoid muscle. To date, there has been no clinical study of a deltoid-preserving approach to access the joint for displaced postero-inferior glenoid fractures (Ideberg type II or Ib). We describe an easy and less invasive approach to the postero-inferior glenoid fossa.
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Affiliation(s)
- Eic Ju Lim
- Department of Orthopaedic Surgery, Chungbuk National University Hospital & College of Medicine, 776, 1sunhwan-ro, Seowon-gu, Cheongju-si, Chungcheongbuk-do, Republic of Korea
| | - Ho-Seung Jeong
- Department of Orthopaedic Surgery, Chungbuk National University Hospital & College of Medicine, 776, 1sunhwan-ro, Seowon-gu, Cheongju-si, Chungcheongbuk-do, Republic of Korea.
| | - Kook-Jong Kim
- Department of Orthopaedic Surgery, Chungbuk National University Hospital & College of Medicine, 776, 1sunhwan-ro, Seowon-gu, Cheongju-si, Chungcheongbuk-do, Republic of Korea
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Park JK, Jeong HS. Clinical and Radiologic Outcomes of Open Reduction and Internal Fixation without Capsular Incision for Inferior Glenoid Fossa Fractures. Clin Orthop Surg 2023; 15:175-181. [PMID: 37008980 PMCID: PMC10060784 DOI: 10.4055/cios22183] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/08/2022] [Revised: 10/11/2022] [Accepted: 10/14/2022] [Indexed: 04/04/2023] Open
Abstract
Background Scapular surgery is usually undertaken via the posterior approach described by Judet. This approach allows access to the entire posterior scapular body; however, it results in severe soft-tissue injury and requires an incision in the deltoid muscle. To date, no clinical study has been reported on open reduction and internal fixation without capsular incision for displaced inferior glenoid fractures (Ideberg type II). The purpose of this study was to introduce an easy and less invasive approach to the inferior glenoid fossa and evaluate its clinical outcomes. Methods Ten patients with displaced inferior glenoid fractures underwent open reduction and internal fixation without capsular incision between January 2017 and July 2018. Postoperative computed tomography was performed to evaluate the reduction state within a week of the surgery. Clinical and radiological data from 7 patients who were followed up for more than 2 years were analyzed. Results The mean age of the patients was 61.7 years (range, 35-87 years). The mean follow-up period was 28.6 months (range, 24-42 months). The mean preoperative fracture gap and step-off values were 12.3 ± 4.4 mm and 6.8 ± 4.0 mm, respectively. Surgical stabilization was conducted 6.4 days (range, 4-13 days) after trauma. Mean postoperative-preoperative fracture gap and step-off values were 0.6 ± 0.6 mm and 0.6 ± 0.8 mm, respectively. At 24 months after surgery, the mean Constant score was 89.1 ± 10.6 points (range, 69-100) and the mean pain visual analog scale score was 1.4 ± 1.7 (range, 0-5). Bony union was observed in all patients. The mean time to bony union was 11 ± 1.7 weeks. The mean active range values for forward elevation, external rotation, and abduction were 162.9° ± 11.1° (range, 150°-180°), 55.7° ± 15.1° (range, 30°-70°), and 158.6° ± 10.7° (range, 150°-180°), respectively. Conclusions The presented posterior open reduction and internal fixation without capsular incision or extensive soft-tissue dissection may be an easy and less invasive surgical approach for inferior glenoid fossa fractures (Ideberg type II).
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Affiliation(s)
- Ji-Kang Park
- Department of Orthopaedic Surgery, Chungbuk National University College of Medicine, Cheongju, Korea
| | - Ho-Seung Jeong
- Department of Orthopaedic Surgery, Chungbuk National University Hospital, Cheongju, Korea
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Jeong HS, Yang JY, Jeon SJ, Shon HC, Oh JK, Lim EJ. Comparison of olecranon osteotomy and paratricipital approach in distal humerus intra-articular fracture: A systematic review and meta-analysis. Medicine (Baltimore) 2022; 101:e30216. [PMID: 36042686 PMCID: PMC9410592 DOI: 10.1097/md.0000000000030289] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/02/2022] Open
Abstract
BACKGROUND Surgical outcomes of the paratricipital approach (PT) and olecranon osteotomy (OO) for the treatment of distal humerus intra-articular fracture have been reported. However, there is no consensus regarding which approach is better in terms of functional outcomes and complications. This study aimed to compare the operation time, functional outcomes, and complications of OO and PT. METHODS The databases of MEDLINE, Embase, and Cochrane Library were systematically searched for studies published before June 1, 2021. We performed synthetic analysis of the operation time, functional outcomes, and incidence of complication after the conduct of OO group or PT group in patients with distal humerus intra-articular fractures. RESULTS Five studies were included representing a total of 243 patients who underwent surgery for distal humerus intra-articular fractures. A pooled analysis showed that there was a longer operation time in the OO group compared with the PT group (mean difference [MD] = 13.32, 95% CI: 3.78-22.87; P = .006). There was no significant difference between the functional outcomes of the OO and PT groups (elbow flexion: MD = 2.4, 95% CI: -0.82 to 5.79, P = .14; elbow extension: MD = 0.36, 95% CI: -2.20 to 2.92, P = .78; elbow arc of motion: MD = 0.40, 95% CI: -4.05 to 4.84, P = .86; Mayo Elbow Performance score: MD = -1.37, 95% CI: -4.73 to 1.98, P = .42). The incidence of infection was significantly higher in the OO group compared with that of the PT group (odds ratio [OR] = 3.82, 95% CI: 1.03-14.16, P = .04). There was no significant difference between the 2 groups in terms of the heterotopic ossification and ulnar neuropathy (OR = 1.85, 95% CI: 0.51-6.71, P = .35 and OR = 2.74, 95% CI: 0.60-12.48, P = .19, respectively). CONCLUSIONS Since the choice of surgical approach does not influence outcomes, surgeons can base their choice of approach on the basis of their own experience and familiarity with the procedure and the need to visualize the entire articular surface in complex intra-articular fracture patterns.
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Affiliation(s)
- Ho-Seung Jeong
- Department of Orthopaedic Surgery, Chungbuk National University Hospital, Chungbuk National University College of Medicine, Cheongju, Republic of Korea
| | - Jae Young Yang
- Department of Orthopaedic Surgery, Chungbuk National University Hospital, Chungbuk National University College of Medicine, Cheongju, Republic of Korea
| | - Seung Jun Jeon
- Department of Orthopaedic Surgery, Chungbuk National University Hospital, Chungbuk National University College of Medicine, Cheongju, Republic of Korea
| | - Hyun-Chul Shon
- Department of Orthopaedic Surgery, Chungbuk National University Hospital, Chungbuk National University College of Medicine, Cheongju, Republic of Korea
| | - Jong-Keon Oh
- Department of Orthopedic Surgery, Korea University Guro Hospital, Seoul, Republic of Korea
| | - Eic Ju Lim
- Department of Orthopaedic Surgery, Chungbuk National University Hospital, Chungbuk National University College of Medicine, Cheongju, Republic of Korea
- *Correspondence: Eic Ju Lim, Department of Orthopaedic Surgery, Chungbuk National University Hospital, 776 1sunhwan-ro, Seowon-gu, Cheongju 28644, Republic of Korea (e-mail: )
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4
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Kim HS, Yoo BY, Ha BK, Jeong HS, Park SH. Investigation of stress fields for non-standard sized glass plates loaded by ring-on-ring. Ann Ital Chir 2022. [DOI: 10.1016/j.jeurceramsoc.2022.01.015] [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: 11/15/2022]
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Kim KJ, Jeong HS, Ahn BH, Chung DM. Clinical Efficacy of the Antibiotic-Loaded Collagen Sponge During Arthroscopic Treatment of Acute Septic Arthritis of the Native Knee. Orthop J Sports Med 2022; 10:23259671221087189. [PMID: 35400138 PMCID: PMC8984851 DOI: 10.1177/23259671221087189] [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] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/13/2021] [Accepted: 01/10/2022] [Indexed: 11/15/2022] Open
Abstract
Background: To completely eliminate an infection, the antibiotic concentration must
exceed the minimum inhibitory concentration for the causative pathogens. The
antibiotic-loaded collagen sponge (ALCS) has been used to manage an
infection through a high local concentration of antibiotics. Purpose: To evaluate the clinical efficacy of ALCS in the arthroscopic treatment of
patients with acute septic arthritis of the native knee. Study Design: Cohort study; Level of evidence, 3. Methods: The authors retrospectively reviewed the data for 132 consecutive patients
with acute septic arthritis of the knee who underwent arthroscopic
debridement between 2013 and 2019. Patients with a history of surgery in the
affected joint, concomitant osteomyelitis, or accompanying medical infection
were excluded. The study patients were divided into 2 groups based on the
use of ALCS during surgery. C-reactive protein (CRP) levels were temporally
measured to normalization and the duration of intravenous antibiotic
administration was recorded, and the mean length of hospital stay was
compared between the groups. Independent t test and
chi-square test were performed to assess differences between the groups, and
univariate analysis was used to analyze factors affecting recurrence of
septic arthritis. Results: Of the 132 patients, 88 were ultimately included in this study; 51 patients
were managed without ALCS and 37 were treated with ALCS. There were
statistically significant differences between groups in the mean period for
CRP-level normalization (15.2 ± 8.2 days [ALCS] vs 26.2 ± 14.7 days [without
ALCS]; P = .004), mean duration of intravenous antibiotic
use (18.4 ± 7.3 days [ALCS] vs 26.6 ± 16.1 days [without ALCS];
P = .046), and mean length of hospital stay (21.1 ±
11.6 days [ALCS] vs 30.3 ± 18.3 days [without ALCS]; P =
.045). The preoperative CRP level was the only significant risk factor for
recurrence or treatment failure after single arthroscopic debridement. Conclusion: The results of this study indicated that ALCS was able to reduce the duration
of CRP-level normalization, intravenous antibiotic use, and hospitalization
in patients who underwent arthroscopic irrigation and debridement for acute
septic arthritis of the native knee.
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Affiliation(s)
- Kook-Jong Kim
- Department of Orthopaedic Surgery, Chungbuk National University Hospital, Cheongju, Republic of Korea
| | - Ho-Seung Jeong
- Department of Orthopaedic Surgery, Chungbuk National University Hospital, Cheongju, Republic of Korea
| | - Byung-Hyun Ahn
- Department of Orthopaedic Surgery, Chungbuk National University Hospital, Cheongju, Republic of Korea
| | - Dong-Min Chung
- Department of Orthopaedic Surgery, Chungbuk National University Hospital, Cheongju, Republic of Korea
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Woo J, Kim JE, Im JJ, Lee J, Jeong HS, Park S, Jung SY, An H, Yoon S, Lim SM, Lee S, Ma J, Shin EY, Han YE, Kim B, Lee EH, Feng L, Chun H, Yoon BE, Kang I, Dager SR, Lyoo IK, Lee CJ. Correction: Astrocytic water channel aquaporin-4 modulates brain plasticity in both mice and humans: a potential gliogenetic mechanism underlying language-associated learning. Mol Psychiatry 2021; 26:7853. [PMID: 34305137 DOI: 10.1038/s41380-021-01185-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- J Woo
- Center for Neural Science and Functional Connectomics, Korea Institute of Science and Technology (KIST), Seoul, Republic of Korea.,Neuroscience Program, University of Science and Technology (UST), Daejeon, Republic of Korea
| | - J E Kim
- Department of Brain and Cognitive Sciences, Scranton College, Ewha Womans University, Seoul, Republic of Korea.,Ewha Brain Institute, Ewha Womans University, Seoul, Republic of Korea
| | - J J Im
- Ewha Brain Institute, Ewha Womans University, Seoul, Republic of Korea.,Interdisciplinary Program in Neuroscience, College of Natural Sciences, Seoul National University, Seoul, Republic of Korea
| | - J Lee
- Center for Neural Science and Functional Connectomics, Korea Institute of Science and Technology (KIST), Seoul, Republic of Korea.,Division of Functional Food Research, Korea Food Research Institute, Seongnam, Republic of Korea
| | - H S Jeong
- Department of Radiology, Incheon St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
| | - S Park
- Center for Neural Science and Functional Connectomics, Korea Institute of Science and Technology (KIST), Seoul, Republic of Korea
| | - S- Y Jung
- Center for Neural Science and Functional Connectomics, Korea Institute of Science and Technology (KIST), Seoul, Republic of Korea.,Neuroscience Program, University of Science and Technology (UST), Daejeon, Republic of Korea
| | - H An
- Center for Neural Science and Functional Connectomics, Korea Institute of Science and Technology (KIST), Seoul, Republic of Korea.,KU-KIST Graduate School of Converging Science and Technology, Korea University,145 Anam-ro, Seongbuk-gu, Seoul, 02841, Republic of Korea
| | - S Yoon
- Ewha Brain Institute, Ewha Womans University, Seoul, Republic of Korea
| | - S M Lim
- Department of Radiology, College of Medicine, Ewha Womans University, Seoul, Republic of Korea
| | - S Lee
- Ewha Brain Institute, Ewha Womans University, Seoul, Republic of Korea.,Interdisciplinary Program in Neuroscience, College of Natural Sciences, Seoul National University, Seoul, Republic of Korea
| | - J Ma
- Ewha Brain Institute, Ewha Womans University, Seoul, Republic of Korea.,Interdisciplinary Program in Neuroscience, College of Natural Sciences, Seoul National University, Seoul, Republic of Korea
| | - E Y Shin
- Department of Brain and Cognitive Sciences, Scranton College, Ewha Womans University, Seoul, Republic of Korea.,Ewha Brain Institute, Ewha Womans University, Seoul, Republic of Korea
| | - Y- E Han
- Center for Neural Science and Functional Connectomics, Korea Institute of Science and Technology (KIST), Seoul, Republic of Korea.,Neuroscience Program, University of Science and Technology (UST), Daejeon, Republic of Korea
| | - B Kim
- Ewha Brain Institute, Ewha Womans University, Seoul, Republic of Korea.,Interdisciplinary Program in Neuroscience, College of Natural Sciences, Seoul National University, Seoul, Republic of Korea
| | - E H Lee
- Green Cross Laboratories, Yongin, Republic of Korea
| | - L Feng
- Center for Neural Science and Functional Connectomics, Korea Institute of Science and Technology (KIST), Seoul, Republic of Korea
| | - H Chun
- Center for Neural Science and Functional Connectomics, Korea Institute of Science and Technology (KIST), Seoul, Republic of Korea
| | - B- E Yoon
- Center for Neural Science and Functional Connectomics, Korea Institute of Science and Technology (KIST), Seoul, Republic of Korea.,Department of Nanobiomedical Science, Dankook University, Cheonan, Republic of Korea
| | - I Kang
- Department of Brain and Cognitive Sciences, Scranton College, Ewha Womans University, Seoul, Republic of Korea.,Ewha Brain Institute, Ewha Womans University, Seoul, Republic of Korea
| | - S R Dager
- Department of Radiology, University of Washington, Seattle, WA, USA.,Department of Bioengineering, University of Washington, Seattle, WA, USA
| | - I K Lyoo
- Department of Brain and Cognitive Sciences, Scranton College, Ewha Womans University, Seoul, Republic of Korea. .,Ewha Brain Institute, Ewha Womans University, Seoul, Republic of Korea. .,Graduate School of Pharmaceutical Sciences, Ewha Womans University, Seoul, Republic of Korea.
| | - C J Lee
- Center for Neural Science and Functional Connectomics, Korea Institute of Science and Technology (KIST), Seoul, Republic of Korea. .,Neuroscience Program, University of Science and Technology (UST), Daejeon, Republic of Korea. .,KU-KIST Graduate School of Converging Science and Technology, Korea University,145 Anam-ro, Seongbuk-gu, Seoul, 02841, Republic of Korea.
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Kang SW, Kim KJ, Park JK, Jeong HS, Cha JK, Kim YH. Closure of Persistent, Small, Posterior Elbow Soft Tissue Defects Using a Rotation Flap: A Retrospective Study. Wound Manag Prev 2020. [DOI: 10.25270/wmp.2020.3.4047] [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: 11/05/2022]
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Kang SW, Kim KJ, Park JK, Jeong HS, Cha JK, Kim YH. Closure of Persistent, Small, Posterior Elbow Soft Tissue Defects Using a Rotation Flap: A Retrospective Study. Wound Manag Prev 2020; 66:40-47. [PMID: 32294055] [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: 06/11/2023]
Abstract
UNLABELLED Treating soft tissue defects occurring over the posterior elbow is challenging. PURPOSE This study aimed to evaluate the long-term outcomes of using rotation flaps for soft tissue defects over the posterior elbow. METHODS A retrospective study was conducted among patients who had sustained posterior elbow defects and underwent rotation flap under local anesthesia between January 2, 2011, and December 31, 2014. Patient inclusion criteria stipulated the soft tissue defect had to be small (<12 cm2), was the result of wound dehiscence following posterior approach surgery immediately following trauma, and had failed to heal using nonsurgical treatment or primary closure. Patients with an active infection, malignancies, a defect of any etiology other than trauma, or incomplete operative data were excluded. Patient demographics, medical history, operative reports, and outcomes were abstracted. Flap failure and surgical complications were monitored for a minimum of 2 years after surgery. Range of motion (ROM; 0˚ to normal 130˚) and Mayo Elbow Performance Scores (MEPS) were evaluated and recorded before surgery and after 2 years' follow-up and included evaluating pain, ROM, stability, and daily function. Patient, wound, surgical, and wound healing variables were compared between the flap survival and flap failure/complication groups using Mann-Whitney U and chi-squared tests. The Wilcoxon signed-rank test was used to compare pre- and postoperative MEPS and elbow ROM. RESULTS Thirty (30) patients (13 male, 17 female; mean age 55 ± 15.6 [range 19-74] years) had complete records. Eighteen (18) flaps were created using the transolecranon approach, and 12 rotation flaps involved an olecranon fracture; 24 flaps survived and 6 patients experienced flap failure/complications (wound dehiscence or infection). Mean procedure duration was 25.6 ± 10.1 minutes. All defects were located over the olecranon with exposed bone or hardware. Mean defect size was 7.4 cm2 ± 2.9 cm2, the average defect duration was 60.4 (range 31-89) days, average time to wound healing was 21.9 ± 11.5 days, and mean follow-up time was 29.4 (range 24-56) months. All flaps successfully survived without recurrence. Mean pre- and postoperative MEPS were significantly different (56.4 vs. 90.2 points; P <.001). ROM did not differ significantly between mean preoperative range (extension 9.8˚ ± 3.2˚ and flexion 116.7˚ ± 10.2˚) and mean final follow-up range (extension 9.6˚ ± 2.6˚ and flexion 118.5˚ ± 11.3˚; P = .459). CONCLUSION Rotation flap surgery performed under local anesthesia may offer a simple and safe option in the treatment of small (<12 cm2) trauma-related defects over the posterior elbow. More research is needed to develop evidence-based guidelines for optimal approaches to posterior elbow soft tissue defect closure techniques.
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Affiliation(s)
- Sang-Woo Kang
- Chungbuk National University Hospital, Cheongju, Korea
| | - Kook-Jong Kim
- Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea
| | - Ji-Kang Park
- Chungbuk National University Hospital, Cheongju, Korea
| | | | - Jung-Kwon Cha
- Chungbuk National University Hospital, Cheongju, Korea
| | - Yoon-Ho Kim
- Chungbuk National University Hospital, Cheongju, Korea
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Lee GJ, Cho H, Ahn BH, Jeong HS. Effects of Electrical Muscle Stimulation for Preventing Deltoid Muscle Atrophy after Rotator Cuff Repair: Preliminary Results of a Prospective, Randomized, Single-blind Trial. Clin Shoulder Elb 2019; 22:195-202. [PMID: 33330219 PMCID: PMC7714312 DOI: 10.5397/cise.2019.22.4.195] [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: 08/19/2019] [Revised: 09/24/2019] [Accepted: 10/27/2019] [Indexed: 01/08/2023] Open
Abstract
Background This study investigates the effects of neuromuscular electrical stimulation (NMES) in preventing deltoid atrophy during the first 12 weeks after arthroscopic rotator cuff repair. Methods Eighteen patients undergoing arthroscopic repair of a medium-sized rotator cuff tear by a single surgeon, were randomized into two groups: NMES and transcutaneous electrical nerve stimulation (TENS). Each group used the respective device for 6 weeks after surgery. Pain was measured at baseline, 6, and 12 weeks postoperatively, using the visual analogue scale (VAS); range of motion (ROM), abduction strength and functional scores were measured at baseline and 12 weeks postoperatively. Deltoid thickness and cross-sectional areas were measured using magnetic resonance imaging at 12 weeks postoperatively. Results At 12 weeks post-surgery, no statistically significant difference was observed between the NMES and TENS groups in the pain VAS, the Disabilities of the Arm, Shoulder and Hand score, ROM, and abduction strength. Postoperative decrease in the thickness of the anterior, middle, and posterior deltoid, at the level just below the coracoid, was -2.5%, -0.7%, and -6.8%, respectively, in the NMES group, and -14.0%, -2.6%, and -8.2%, respectively, in the TENS group (p=0.016, p=0.677, and p=0.791, respectively). At the level of the inferior glenoid tubercle, postoperative decrease in area of the deltoid was -5.4% in the NMES group and -14.0% in the TENS group, which was significantly different (p=0.045). Conclusions NMES has the potential for reducing deltoid atrophy after arthroscopic rotator cuff repair, suggesting that NMES might help minimize postoperative atrophy after various shoulder surgeries.
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Affiliation(s)
- Goo Joo Lee
- Department of Rehabilitation Medicine, Chungbuk National University Hospital, Cheongju, Korea
| | - Hangyeol Cho
- Department of Rehabilitation Medicine, Chungbuk National University Hospital, Cheongju, Korea
| | - Byung-Hyun Ahn
- Department of Orthopedic Surgery, Chungbuk National University Hospital, Cheongju, Korea
| | - Ho-Seung Jeong
- Department of Orthopedic Surgery, Chungbuk National University Hospital, Cheongju, Korea
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Kang SW, Park HM, Park JK, Jeong HS, Cha JK, Go BS, Min KT. Open cubital and carpal tunnel release using wide-awake technique: reduction of postoperative pain. J Pain Res 2019; 12:2725-2731. [PMID: 31571976 PMCID: PMC6754514 DOI: 10.2147/jpr.s210366] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [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: 03/28/2019] [Accepted: 08/29/2019] [Indexed: 12/31/2022] Open
Abstract
Purpose This study aimed to compare the efficacy of and patient satisfaction with the wide-awake local anesthesia with no tourniquet (WALANT) technique in open cubital and carpal tunnel release surgery. Methods From January 2016 to February 2017, 20 cubital tunnel syndrome (CuTS) patients were in a wide-awake (WA) group and 22 in a general (GA) anesthesia group in . Also, 20 carpal tunnel syndrome (CTS) patients were in a WA group, 22 in a local anesthesia (LA) group, and 20 in a GA group. Injection pain, perioperative pain, and postoperative pain were assessed using a 10-point pain VAS. In CuTS, functional outcome on the “quick” Disabilities of the Arm, Shoulder, and Hand questionnaire were evaluated. In CTS, subjective outcomes were assessed using the Korean version of the Michigan Hand Outcomes Questionnaire. Results Both CuTS and CTS showed significant postoperative pain reduction in group WA. In CuTS, group WA had less pain than group GA up to 48 hours after surgery (P<0.05). Supplemental opioid injections were used on hospitalization day by 12% of group WA and 35% of group GA. In CTS, the postoperative VAS scores in group WA were lower during the first 24 hours than groups LA and GA (P<0.05). Opioid injections were used on hospitalization day by 5% of WA, 18% of LA, and 32% of group GA. There was no difference in postoperative functional outcomes according to anesthesia method in CuTS or CTS. Conclusion Cubital and carpal tunnel surgery using the WALANT technique was comparable in function to other anesthesia methods and superior for pain. Immediate postoperative pain was much lower than other groups, which could reduce the use of opioids during hospitalization.
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Affiliation(s)
- Sang-Woo Kang
- Department of Orthopaedic Surgery, Chungbuk National University Hospital, Cheongju, South Korea
| | - Hye-Mi Park
- Department of Psychiatry, Chungbuk National University Hospital, Cheongju, South Korea
| | - Ji-Kang Park
- Department of Orthopaedic Surgery, Chungbuk National University Hospital, Cheongju, South Korea
| | - Ho-Seung Jeong
- Department of Orthopaedic Surgery, Chungbuk National University Hospital, Cheongju, South Korea
| | - Jung-Kwon Cha
- Department of Orthopaedic Surgery, Chungbuk National University Hospital, Cheongju, South Korea
| | - Ban-Suk Go
- Department of Orthopaedic Surgery, Chungbuk National University Hospital, Cheongju, South Korea
| | - Kyoung-Tae Min
- Department of Orthopaedic Surgery, Chungbuk National University Hospital, Cheongju, South Korea
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Kook H, Yu CW, Jeong HS, Jang DH, Lee SH, Joo HJ, Park JH, Hong SJ, Lim DS, Shim WJ, Kim JS, Lee HJ, Kang WC. P1668Comparison of clinical outcomes between left atrial appendage occlusion with dual antiplatelet therapy versus conventional antithrombotic therapy in patients with atrial fibrillation undergoing PCI. Eur Heart J 2018. [DOI: 10.1093/eurheartj/ehy565.p1668] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Affiliation(s)
- H Kook
- Korea University Anam Hospital, Cardiology, Seoul, Korea Republic of
| | - C W Yu
- Korea University Anam Hospital, Cardiology, Seoul, Korea Republic of
| | - H S Jeong
- Korea University Anam Hospital, Cardiology, Seoul, Korea Republic of
| | - D H Jang
- Korea University Anam Hospital, Cardiology, Seoul, Korea Republic of
| | - S H Lee
- Sejong General Hospital, Cardiology, Bucheon, Korea Republic of
| | - H J Joo
- Korea University Anam Hospital, Cardiology, Seoul, Korea Republic of
| | - J H Park
- Korea University Anam Hospital, Cardiology, Seoul, Korea Republic of
| | - S J Hong
- Korea University Anam Hospital, Cardiology, Seoul, Korea Republic of
| | - D S Lim
- Korea University Anam Hospital, Cardiology, Seoul, Korea Republic of
| | - W J Shim
- Korea University Anam Hospital, Cardiology, Seoul, Korea Republic of
| | - J S Kim
- Severance Hospital, Cardiology, Seoul, Korea Republic of
| | - H J Lee
- Sejong General Hospital, Cardiology, Bucheon, Korea Republic of
| | - W C Kang
- Gil Hospital, Cardiology, Incheon, Korea Republic of
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12
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Woo J, Kim JE, Im JJ, Lee J, Jeong HS, Park S, Jung SY, An H, Yoon S, Lim SM, Lee S, Ma J, Shin EY, Han YE, Kim B, Lee EH, Feng L, Chun H, Yoon BE, Kang I, Dager SR, Lyoo IK, Lee CJ. Astrocytic water channel aquaporin-4 modulates brain plasticity in both mice and humans: a potential gliogenetic mechanism underlying language-associated learning. Mol Psychiatry 2018; 23:1021-1030. [PMID: 29565042 DOI: 10.1038/mp.2017.113] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/07/2016] [Revised: 03/21/2017] [Accepted: 04/17/2017] [Indexed: 01/04/2023]
Abstract
The role of astrocytes in brain plasticity has not been extensively studied compared with that of neurons. Here we adopted integrative translational and reverse-translational approaches to explore the role of an astrocyte-specific major water channel in the brain, aquaporin-4 (AQP4), in brain plasticity and learning. We initially identified the most prevalent genetic variant of AQP4 (single nucleotide polymorphism of rs162008 with C or T variation, which has a minor allele frequency of 0.21) from a human database (n=60 706) and examined its functionality in modulating the expression level of AQP4 in an in vitro luciferase reporter assay. In the following experiments, AQP4 knock-down in mice not only impaired hippocampal volumetric plasticity after exposure to enriched environment but also caused loss of long-term potentiation after theta-burst stimulation. In humans, there was a cross-sectional association of rs162008 with gray matter (GM) volume variation in cortices, including the vicinity of the Perisylvian heteromodal language area (Sample 1, n=650). GM volume variation in these brain regions was positively associated with the semantic verbal fluency. In a prospective follow-up study (Sample 2, n=45), the effects of an intensive 5-week foreign language (English) learning experience on regional GM volume increase were modulated by this AQP4 variant, which was also associated with verbal learning capacity change. We then delineated in mice mechanisms that included AQP4-dependent transient astrocytic volume changes and astrocytic structural elaboration. We believe our study provides the first integrative evidence for a gliogenetic basis that involves AQP4, underlying language-associated brain plasticity.
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Affiliation(s)
- J Woo
- Center for Neural Science and Functional Connectomics, Korea Institute of Science and Technology (KIST), Seoul, Republic of Korea.,Neuroscience Program, University of Science and Technology (UST), Daejeon, Republic of Korea
| | - J E Kim
- Department of Brain and Cognitive Sciences, Scranton College, Ewha Womans University, Seoul, Republic of Korea.,Ewha Brain Institute, Ewha Womans University, Seoul, Republic of Korea
| | - J J Im
- Ewha Brain Institute, Ewha Womans University, Seoul, Republic of Korea.,Interdisciplinary Program in Neuroscience, College of Natural Sciences, Seoul National University, Seoul, Republic of Korea
| | - J Lee
- Center for Neural Science and Functional Connectomics, Korea Institute of Science and Technology (KIST), Seoul, Republic of Korea
| | - H S Jeong
- Department of Radiology, Incheon St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
| | - S Park
- Center for Neural Science and Functional Connectomics, Korea Institute of Science and Technology (KIST), Seoul, Republic of Korea
| | - S-Y Jung
- Center for Neural Science and Functional Connectomics, Korea Institute of Science and Technology (KIST), Seoul, Republic of Korea.,Neuroscience Program, University of Science and Technology (UST), Daejeon, Republic of Korea
| | - H An
- Center for Neural Science and Functional Connectomics, Korea Institute of Science and Technology (KIST), Seoul, Republic of Korea.,Department of Radiology, University of Washington, Seattle, WA, USA.,Department of Bioengineering, University of Washington, Seattle, WA, USA
| | - S Yoon
- Ewha Brain Institute, Ewha Womans University, Seoul, Republic of Korea
| | - S M Lim
- Department of Radiology, College of Medicine, Ewha Womans University, Seoul, Republic of Korea
| | - S Lee
- Ewha Brain Institute, Ewha Womans University, Seoul, Republic of Korea.,Interdisciplinary Program in Neuroscience, College of Natural Sciences, Seoul National University, Seoul, Republic of Korea
| | - J Ma
- Ewha Brain Institute, Ewha Womans University, Seoul, Republic of Korea.,Interdisciplinary Program in Neuroscience, College of Natural Sciences, Seoul National University, Seoul, Republic of Korea
| | - E Y Shin
- Department of Brain and Cognitive Sciences, Scranton College, Ewha Womans University, Seoul, Republic of Korea.,Ewha Brain Institute, Ewha Womans University, Seoul, Republic of Korea
| | - Y-E Han
- Center for Neural Science and Functional Connectomics, Korea Institute of Science and Technology (KIST), Seoul, Republic of Korea.,Neuroscience Program, University of Science and Technology (UST), Daejeon, Republic of Korea
| | - B Kim
- Ewha Brain Institute, Ewha Womans University, Seoul, Republic of Korea.,Interdisciplinary Program in Neuroscience, College of Natural Sciences, Seoul National University, Seoul, Republic of Korea
| | - E H Lee
- Green Cross Laboratories, Yongin, Republic of Korea
| | - L Feng
- Center for Neural Science and Functional Connectomics, Korea Institute of Science and Technology (KIST), Seoul, Republic of Korea
| | - H Chun
- Center for Neural Science and Functional Connectomics, Korea Institute of Science and Technology (KIST), Seoul, Republic of Korea
| | - B-E Yoon
- Center for Neural Science and Functional Connectomics, Korea Institute of Science and Technology (KIST), Seoul, Republic of Korea.,Department of Nanobiomedical Science, Dankook University, Cheonan, Republic of Korea
| | - I Kang
- Department of Brain and Cognitive Sciences, Scranton College, Ewha Womans University, Seoul, Republic of Korea.,Ewha Brain Institute, Ewha Womans University, Seoul, Republic of Korea
| | - S R Dager
- Department of Radiology, University of Washington, Seattle, WA, USA.,Department of Bioengineering, University of Washington, Seattle, WA, USA
| | - I K Lyoo
- Department of Brain and Cognitive Sciences, Scranton College, Ewha Womans University, Seoul, Republic of Korea.,Ewha Brain Institute, Ewha Womans University, Seoul, Republic of Korea.,Graduate School of Pharmaceutical Sciences, Ewha Womans University, Seoul, Republic of Korea
| | - C J Lee
- Center for Neural Science and Functional Connectomics, Korea Institute of Science and Technology (KIST), Seoul, Republic of Korea.,Neuroscience Program, University of Science and Technology (UST), Daejeon, Republic of Korea.,KU-KIST, Graduate School of Convergence Technology, Korea University, Seoul, Republic of Korea
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13
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Jeong HS, Lee J, Lim BJ, Kwon HJ, Kim YS, Kim BS, Huh KH, Kim SI, Kim MS, Jeong HJ. Concurrent Post-Transplantation Diabetes Mellitus in Renal Allograft Recipients With Immunoglobulin A Nephropathy. Transplant Proc 2016; 48:887-9. [PMID: 27234759 DOI: 10.1016/j.transproceed.2015.11.032] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2015] [Accepted: 11/06/2015] [Indexed: 11/27/2022]
Abstract
BACKGROUND The prevalence of post-transplantation immunoglobulin A nephropathy (PTIgAN) and diabetes mellitus (PTDM) increases with time after transplantation, and recognition and management of these conditions is becoming more important in renal allograft recipients as graft survival increases. METHODS We explored the influence of concurrent PTDM on renal allograft histology and function in 111 cases with PTIgAN diagnosed from 2000 to 2010 at our institution. RESULTS Sixteen patients (14.4%) had PTDM at the time of diagnosis of PTIgAN, which increased to 28 patients (25.2%) at the last follow-up (10.4 years after transplantation). Donor ages were younger in PTIgAN patients with concurrent PTDM. However, other clinical and demographic data were not significantly different between PTIgAN patients with and without PTDM. Histologically, Banff "mm" scores were higher and "M1" of the Oxford classification was more frequent in PTIgAN patients with concurrent PTDM than in patients without PTDM, but the difference did not reach statistical significance. Serum creatinine levels and proteinuria at the time of biopsy and overall graft survival did not vary according to the presence of PTDM both at biopsy and at the last follow-up. CONCLUSIONS Concurrent PTDM does not significantly influence graft function or outcome for 10 years after transplantation in PTIgAN patients.
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Affiliation(s)
- H S Jeong
- Department of Pathology, Yonsei University College of Medicine, Seoul, Korea
| | - J Lee
- Department of Transplantation Surgery, Yonsei University College of Medicine, Seoul, Korea
| | - B J Lim
- Department of Pathology, Yonsei University College of Medicine, Seoul, Korea
| | - H J Kwon
- Department of Pathology, Yonsei University College of Medicine, Seoul, Korea
| | - Y S Kim
- Department of Transplantation Surgery, Yonsei University College of Medicine, Seoul, Korea; Institute of Transplantation, Yonsei University College of Medicine, Seoul, Korea
| | - B S Kim
- Department of Internal Medicine, Yonsei University College of Medicine, Seoul, Korea
| | - K H Huh
- Department of Transplantation Surgery, Yonsei University College of Medicine, Seoul, Korea; Institute of Transplantation, Yonsei University College of Medicine, Seoul, Korea
| | - S I Kim
- Department of Transplantation Surgery, Yonsei University College of Medicine, Seoul, Korea; Institute of Transplantation, Yonsei University College of Medicine, Seoul, Korea
| | - M S Kim
- Department of Transplantation Surgery, Yonsei University College of Medicine, Seoul, Korea; Institute of Transplantation, Yonsei University College of Medicine, Seoul, Korea
| | - H J Jeong
- Department of Pathology, Yonsei University College of Medicine, Seoul, Korea; Institute of Transplantation, Yonsei University College of Medicine, Seoul, Korea.
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14
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Lyoo IK, Yoon S, Kim TS, Lim SM, Choi Y, Kim JE, Hwang J, Jeong HS, Cho HB, Chung YA, Renshaw PF. Predisposition to and effects of methamphetamine use on the adolescent brain. Mol Psychiatry 2015; 20:1516-24. [PMID: 25666756 PMCID: PMC5653271 DOI: 10.1038/mp.2014.191] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/31/2014] [Revised: 11/13/2014] [Accepted: 12/08/2014] [Indexed: 01/16/2023]
Abstract
Adolescence is a period of heightened vulnerability both to addictive behaviors and drug-induced brain damage. Yet, only limited information exists on the brain mechanisms underlying these adolescent-specific characteristics. Moreover, distinctions in brain correlates between predisposition to drug use and effects of drugs in adolescents are unclear. Using cortical thickness and diffusion tensor image analyses, we found greater and more widespread gray and white matter alterations, particularly affecting the frontostriatal system, in adolescent methamphetamine (MA) users compared with adult users. Among adolescent-specific gray matter alterations related to MA use, smaller cortical thickness in the orbitofrontal cortex was associated with family history of drug use. Our findings highlight that the adolescent brain, which undergoes active myelination and maturation, is more vulnerable to MA-related alterations than the adult brain. Furthermore, MA-use-related executive dysfunction was greater in adolescent MA users than in adult users. These findings may provide explanation for the severe behavioral complications and relapses that are common in adolescent-onset drug addiction. Additionally, these results may provide insights into distinguishing the neural mechanisms that underlie the predisposition to drug addiction from effects of drugs in adolescents.
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Affiliation(s)
- IK Lyoo
- Ewha Brain Institute, Ewha Womans University, Seoul, South Korea,Graduate School of Pharmaceutical Sciences, Ewha Womans University, Seoul, South Korea,Department of Brain and Cognitive Sciences, Ewha Womans University Graduate School, Seoul, South Korea
| | - S Yoon
- Ewha Brain Institute, Ewha Womans University, Seoul, South Korea
| | - TS Kim
- Department of Psychiatry, The Catholic University of Korea College of Medicine, Seoul, South Korea
| | - SM Lim
- Department of Radiology, Ewha Womans University College of Medicine, Seoul, South Korea
| | - Y Choi
- Ewha Brain Institute, Ewha Womans University, Seoul, South Korea
| | - JE Kim
- Ewha Brain Institute, Ewha Womans University, Seoul, South Korea,Department of Brain and Cognitive Sciences, Ewha Womans University Graduate School, Seoul, South Korea
| | - J Hwang
- Department of Psychiatry, Soonchunhyang University College of Medicine, Seoul, South Korea
| | - HS Jeong
- Department of Radiology, The Catholic University of Korea College of Medicine, Seoul, South Korea
| | - HB Cho
- Ewha Brain Institute, Ewha Womans University, Seoul, South Korea
| | - YA Chung
- Department of Radiology, The Catholic University of Korea College of Medicine, Seoul, South Korea
| | - PF Renshaw
- The Brain Institute and Department of Psychiatry, The University of Utah, Salt Lake City, UT, USA
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15
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Jeong HS, Park KJ, Kil KM, Chong S, Eun HJ, Lee TS, Lee JP. Minimally invasive plate osteosynthesis using 3D printing for shaft fractures of clavicles: technical note. Arch Orthop Trauma Surg 2014; 134:1551-5. [PMID: 25164764 DOI: 10.1007/s00402-014-2075-8] [Citation(s) in RCA: 65] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/29/2014] [Indexed: 11/30/2022]
Abstract
This article describes a minimally invasive plate osteosynthesis technique for midshaft fractures of clavicles using intramedullary indirect reduction and prebent plates with 3D printing models. This technique allows for easy reduction of fractures with accurate prebent plates and minimal soft tissue injury around the fracture site.
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Affiliation(s)
- Ho-Seung Jeong
- Department of Orthopaedic Surgery, College of Medicine, Chungbuk National University, 62, Gaesin-Dong, Cheongju, ChungBuk, 360-711, Korea
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16
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Kim YM, Park KJ, Kim DS, Choi ES, Shon HC, Cho BK, Park JK, Keum SW, Jeong HS. Treatment of Pseudoarthrosis due to Nonunion of the Acromial Fracture with LCP - Case Report -. Clin Shoulder Elb 2013. [DOI: 10.5397/cise.2013.16.2.130] [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: 11/25/2022] Open
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17
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Jeong HS, Kim SH, Lee KS, Jeong JM, Yoo TW, Kwon MS, Yoo KH, Kim TW. Optical properties of white organic light-emitting devices fabricated utilizing a mixed CaAl12O19:Mn4+ and Y3Al5O12:Ce3+ color conversion layer. J Nanosci Nanotechnol 2013; 13:4394-4397. [PMID: 23862509 DOI: 10.1166/jnn.2013.7003] [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] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
White organic light-emitting devices (OLEDs) were fabricated by combining a blue OLED with a color conversion layer made of mixed Y3Al5O12:Ce3+ green and Ca2AlO19:Mn4+ red phosphors. The X-ray diffraction patterns showed that Ce3+ ions in the Y3Al5O12:Ce3+ phosphors completely substituted for the Y3+ ions and the Mn4+ ions in the CaAl12O19:Mn4+ phosphors completely substituted for the Ca2+ ions. Electroluminescence spectra at 11 V for the OLEDs fabricated utilizing a color conversion layer showed that the Commission Internationale de l'Eclairage coordinates for the Y3Al5O12:Ce3+ and CaAl12O19:Mn4+ phosphors mixed at the ratio of 1:5 and 1:10 were (0.31, 0.34) and (0.32, 0.37), respectively, indicative of a good white color.
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Affiliation(s)
- H S Jeong
- Department Electronics and Computer Engineering, Hanyang University, Seoul 133-791, Korea
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18
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Jeong HS, Kim SH, Bang HS, Choo DC, Kim TW, Hwang DH, Kwon MS, Chu C. Effects of the mixing ratio of the CaAl12O19:mn and Zn2SiO4:mn color-conversion layer on the color tunable emissions of white organic light-emitting devices. J Nanosci Nanotechnol 2012; 12:1654-1657. [PMID: 22630022 DOI: 10.1166/jnn.2012.4588] [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] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
The optical properties of white organic light-emitting devices (WOLEDs) fabricated utilizing a CaAl12O19:Mn and Zn2SiO4:Mn phosphor layer were investigated. X-ray diffraction patterns for CaAl12O19:Mn and Zn2SiO4:Mn phosphors showed that Mn ions in the CaAl12O19:Mn phosphors were completely substituted into Ca ions and that Mn ions in the Zn2SiO4:Mn phosphors were completely substituted into Zn ions. Field emission scanning electron microscopy images showed that the size of the CaAl12O19:Mn phosphor was approximately between 0.1 and 3 microm, and that the size of the Zn2SiO4:Mn phosphor was smaller than 7 microm. The color coordinates of the electroluminescence spectra for WOLEDs with phosphor thicknesses of 0.25 and 0.35 mm shifted to the white emission side because the generated blue light from the blue OLEDs combined with the red and green lights was converted by the CaAl12O19:Mn and the Zn2SiO4:Mn phosphor down-conversion layers.
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Affiliation(s)
- H S Jeong
- Department of Electronics and Computer Engineering, Hanyang University, Seoul 133-791, Korea
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19
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Jeong AY, Jeong HS, Jo MY, Jung SY, Lee MS, Lee JS, Jee YM, Kim JH, Cheon DS. Molecular epidemiology and genetic diversity of human astrovirus in South Korea from 2002 to 2007. Clin Microbiol Infect 2011; 17:404-8. [PMID: 20491833 DOI: 10.1111/j.1469-0691.2010.03263.x] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
The present study was conducted to survey the prevalence and genotypic distribution of human astrovirus (HAstV) circulating in South Korea. Of 160,027 patients with acute gastroenteritis, 2,057 (1.3%) were positive for HAstV antigen. We determined the genotypes of 187 HAstV strains collected from laboratories across the country. Genetic analysis revealed genotype 1 to be the most prevalent, accounting for 72.19% of the strains, followed by genotypes 8 (9.63%), 6 (6.95%), 4 (6.42%), 2 (3.21%) and 3 (1.60%). Our findings indicate that HAstV is less common but, even so, a potentially important viral agent of gastroenteritis in South Korea, with significant genetic diversity among circulating HAstV strains.
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Affiliation(s)
- A Y Jeong
- Division of Enteric and Hepatitis Viruses, Center for Infectious Diseases, National Institute of Health, Korea Centers for Disease Control and Prevention, Seoul, South Korea
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20
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Kim JE, Yoon SJ, Kim J, Jung JY, Jeong HS, Cho HB, Shin E, Lyoo IK, Kim TS. Efficacy and tolerability of mirtazapine in treating major depressive disorder with anxiety symptoms: an 8-week open-label randomised paroxetine-controlled trial. Int J Clin Pract 2011; 65:323-9. [PMID: 21314870 DOI: 10.1111/j.1742-1241.2010.02624.x] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
Abstract
AIMS Prominent anxiety symptoms are related to poor clinical course and outcome in major depressive disorder (MDD). The aim of this randomised, open-label, controlled study is to compare the efficacy and tolerability of mirtazapine in the form of orally disintegrating tablets against paroxetine in treating MDD patients with anxiety symptoms. METHODS A total of 60 MDD patients with a score above 18 on the Hamilton Anxiety Rating Scale (HARS) were randomly assigned to 8 weeks of fixed dosing treatment with mirtazapine (15-30 mg/day) and paroxetine (10-20 mg/day). Efficacy was primarily assessed with the HARS and with the 17-item Hamilton Depression Rating Scale (HDRS) at weeks 1, 2, 4 and 8 after treatment. Tolerability was assessed from adverse events. RESULTS The generalised estimating equations (GEE) models showed that the rates of improvement in HDRS scores from baseline to week 8 were similar between mirtazapine and paroxetine groups. However, patients with mirtazapine exhibited earlier improvement in HARS scores at weeks 1 and 2. Week-by-week GEE models showed that these significant differences in improvement of HARS scores between the two treatment groups were detectable from the first evaluation after the treatment (week 1) and maintained through week 2. There was no difference in the overall frequency of adverse events experienced between the two treatment groups. The most common adverse event in the mirtazapine group was somnolence (n = 8), whereas that in the paroxetine group was gastrointestinal discomfort (n = 9). CONCLUSIONS Mirtazapine and paroxetine were equally effective and well tolerated for the depressive symptoms in MDD patients with the high level of anxiety symptoms. Mirtazapine was, however, more effective in reducing the anxiety symptoms than paroxetine in the early weeks of treatment, suggesting that mirtazapine may have an earlier-onset action for the anxiety symptoms in MDD patients.
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Affiliation(s)
- J E Kim
- Department of Psychiatry, Seoul National University College of Medicine, Seoul, South Korea
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21
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Park KS, Jeong HS, Baek KA, Lee CG, Park SM, Park JS, Choi YJ, Choi HJ, Cheon DS. Genetic analysis of norovirus GII.4 variants circulating in Korea in 2008. Arch Virol 2010; 155:635-41. [PMID: 20224892 DOI: 10.1007/s00705-010-0627-y] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2009] [Accepted: 02/05/2010] [Indexed: 11/29/2022]
Abstract
Noroviruses are the enteric pathogens most commonly responsible for infectious gastroenteritis and outbreaks of foodborne illness. The GII.4 norovirus, in particular, is responsible for the majority of epidemics. Here, we present data on the distribution of norovirus genotypes in Chungnam, Korea, in 2008, measure genetic variation among GII.4 strains, and compare Korean GII.4 variants with reference strains based on the 237-bp junction of ORF1 and ORF2. We detected 139 different strains, which formed two distinct genetic clusters with significant sequence diversity. One Korean cluster (2008-Korea_a) showed high similarity to the Sakai cluster that appeared in Japan and Europe in 2006. The other cluster (2008-Korea_b) was unique and unrelated to previously reported clusters. Genotype GII.4 was confirmed as the predominant cause of norovirus epidemics in Korea. Foodborne norovirus infections, on the other hand, were generally caused by emerging GII.4 genetic variants similar to those responsible for global epidemics.
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Affiliation(s)
- K S Park
- Chungcheongnam-Do Institute of Health and Environmental Research, Daejeon, Korea
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22
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Choi Y, Lim SY, Jeong HS, Koo KA, Sung SH, Kim YC. Oligonucleotide microarray analysis of apoptosis induced by 15-methoxypinusolidic acid in microglial BV2 cells. Br J Pharmacol 2009; 157:1053-64. [PMID: 19466985 DOI: 10.1111/j.1476-5381.2009.00247.x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
BACKGROUND AND PURPOSE We conducted a genome wide gene expression analysis to explore the biological aspects of 15-methoxypinusolidic acid (15-MPA) isolated from Biota orientalis and tried to confirm the suitability of 15-MPA as a therapeutic candidate for CNS injuries focusing on microglia. EXPERIMENTAL APPROACH Murine microglial BV2 cells were treated with 15-MPA, and their transcriptome was analysed by using oligonucleotide microarrays. Genes differentially expressed upon 15-MPA treatment were selected for RT-PCR (reverse transcription-polymerase chain reaction) analysis to confirm the gene expression. Inhibition of cell proliferation and induction of apoptosis by 15-MPA were examined by bromodeoxyuridine assay, Western blot analysis of poly-ADP-ribose polymerase and flow cytometry. KEY RESULTS A total of 514 genes were differentially expressed by 15-MPA treatment. Biological pathway analysis revealed that 15-MPA induced significant changes in expression of genes in the cell cycle pathway. Genes involved in growth arrest and DNA damage [gadd45alpha, gadd45gamma and ddit3 (DNA damage-inducible transcript 3)] and cyclin-dependent kinase inhibitor (cdkn2b) were up-regulated, whereas genes involved in cell cycle progression (ccnd1, ccnd3 and ccne1), DNA replication (mcm4, orc1l and cdc6) and cell proliferation (fos and jun) were down-regulated. RT-PCR analysis for representative genes confirmed the expression levels. 15-MPA significantly reduced bromodeoxyuridine incorporation, increased poly-ADP-ribose polymerase cleavage and the number of apoptotic cells, indicating that 15-MPA induces apoptosis in BV2 cells. CONCLUSION AND IMPLICATIONS 15-MPA induced apoptosis in murine microglial cells, presumably via inhibition of the cell cycle progression. As microglial activation is detrimental in CNS injuries, these data suggest a strong therapeutic potential of 15-MPA.
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Affiliation(s)
- Y Choi
- College of Pharmacy and Research Institute of Pharmaceutical Science, Seoul National University, Seoul 151-742, Korea
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23
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Suh CW, Lee SH, Jeong HS, Kwon JC, Shin HS. Effects of influent COD/N ratio and internal recycle ratio on nitrogen removal efficiency in the KNR process. Water Sci Technol 2006; 53:265-70. [PMID: 16841751 DOI: 10.2166/wst.2006.282] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/10/2023]
Abstract
In this study, with the KNR process that has many advantages, the nitrogen removal efficiency of KNR was experimentally investigated at various COD/N ratios of influent conditions. The optimal operating condition of internal recycle ratio was evaluated. The TN removal efficiencies were 59.1, 72.5 and 75.9% at the COD/N ratios of 3, 5 and 7, respectively. These high removal efficiencies resulted from high denitrification rate in UMBR with high microorganism concentration. Furthermore, specific endogenous denitrification at MLVSS of 10.3 g/L that is similar to MLVSS in UMBR was over two times higher than that at MLVSS of 2.06 g/L. This result suggests that endogenous denitrification rate in UMBR is so high that the requirement of an external carbon source can be saved. As the internal recycle ratio increased from 100 to 400%, the TN removal efficiency also improved from 69.5 to 82.9%, and the optimal internal recycle ratio was 300%.
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Affiliation(s)
- C W Suh
- Department of Civil and Environmental Engineering, Korea Advanced Institute of Science and Technology, Daejeon
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24
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Ahn YT, Choi YK, Jeong HS, Chae SR, Shin HS. Modeling of extracellular polymeric substances and soluble microbial products production in a submerged membrane bioreactor at various SRTs. Water Sci Technol 2006; 53:209-16. [PMID: 16752783 DOI: 10.2166/wst.2006.330] [Citation(s) in RCA: 6] [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] [Subscribe] [Scholar Register] [Indexed: 05/10/2023]
Abstract
Extracelluar polymeric substances (EPSs) and soluble microbial products (SMPs) produced by microbial cultures involved in membrane biofouling have been widely investigated. A mathematical model of EPS and SMP formation and degradation was established based on the activated sludge model no. 1 (ASM1) and was applied to the membrane bioreactor sludge with different sludge retention times (SRTs). The unified theory that the distinct products from the EPS and SMP overlapped each other was integrated into the ASM1. Two components, five processes and eight parameters were newly added to set up the model. To increase the accuracy of model simulation, microbial kinetic parameters were determined by respirometry method and applied to the model instead of microbial kinetic constant offered in ASM1. From the respirometry result, both of heterotroph and autotroph showed different yield value, growth rate and decay rate from activated sludge. There was no significant effect of SRT on SMP production and the experimental results showed good agreement with the predicted values by the model simulation. With the developed unified EPS and SMP model, EPS and SMP production could be simulated so well that it can be applied for the membrane biofouling control.
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Affiliation(s)
- Y T Ahn
- Department of Civil and Environmental Engineering, Korea Advanced Institute of Science & Technology, Daejeon, Korea.
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Park KK, Han SM, Jegal MY, Jeong HS, Lee JG, Kim HC. Patterns and sites of tumor necrosis factor-alpha and transforming growth factor-beta1 expression in human renal allograft biopsies. Transplant Proc 2003; 35:249-50. [PMID: 12591384 DOI: 10.1016/s0041-1345(02)03957-x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- K K Park
- Department of Pathology, Keimyung University School of Medicine, Daegu, South Korea.
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Lee KH, Ahn JI, Yu DH, Jeong HS, Lee SH, Kim KS, Chung IY, Kim JH, Lee YS. Effect of N-glycosylation on ligand binding affinity of rat V1a vasopressin receptor. Biochem Biophys Res Commun 2001; 286:707-13. [PMID: 11520055 DOI: 10.1006/bbrc.2001.5456] [Citation(s) in RCA: 5] [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: 11/22/2022]
Abstract
A rat Vla vasopressin (rVla) receptor has two putative N-glycosylation sites at 14th and 27th amino acid asparagine in the extracellular N-terminus. In the present study, we examined the possible roles of N-glycosylation of the N-terminus in the receptor function. Three point mutants for deglycosylated rVla receptor were generated in which the 14th and/or the 27th asparagine was replaced with glutamine, namely N14Q, N27Q, and N14:27Q, each tagged with an enhanced green fluorescent protein (EGFP) at their C-termini, and transfected to COS-7 or HEK292 cells. The two single mutants and a double mutant have progressively smaller molecular mass compared to the wild-type receptor as determined by immunoblot analysis, indicating that the two sites are effectively glycosylated in vivo. The maximal ligand binding capacities of three mutant receptors were comparable to that of wild-type (17.02 +/- 1.32 pmol/g protein) with modest changes in ligand binding affinities: N27Q and N14:27Q had decreased binding affinities compared to N14Q and wild-type receptors. The reduced binding affinities of the deglycosylated mutants are not likely due to the impaired intracellular transport since their traffickings were indistinguishable from one another. Taken together, these results suggest that the N-glycosylation at the two sites of the N-terminus of rV1a receptor minimally affects the surface expression and trafficking of the receptor.
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Affiliation(s)
- K H Lee
- Department of Biochemistry, College of Medicine, Hanyang University, Seoul, Korea
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Jeong HS, Jeong KC, Choi HK, Park KJ, Lee KH, Rhee JH, Choi SH. Differential expression of Vibrio vulnificus elastase gene in a growth phase-dependent manner by two different types of promoters. J Biol Chem 2001; 276:13875-80. [PMID: 11297524 DOI: 10.1074/jbc.m010567200] [Citation(s) in RCA: 56] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Elastase activity of Vibrio vulnificus was highly dependent on growth phase, reached a maximum during the stationary phase, and was regulated at the level of transcription. The stationary phase production of elastase in crp or rpoS mutants, which were constructed by allelic exchanges, decreased about 3- and 10-fold, respectively. However, the promoter activity of vvpE encoding elastase was unaffected by those mutations in the log phase when analyzed using a vvpE-lux fusion. A primer extension analysis revealed that the transcription of vvpE begins at two different sites, consisting of putative promoter L (PL) and promoter S (PS). The PL activity was constitutive through the log and stationary phases, lower than the PS activity, and unaffected by the crp or rpoS mutations. The transcription of PS, induced only in the stationary phase, was dependent on RpoS. The mutation in crp reduced the activity of PS; however, the additional inactivation of crp did not influence the PS activity in the rpoS mutant, indicating that CRP exerted its effects through PS requiring RpoS. These results demonstrate that vvpE expression is differentially directed by PL and PS depending on the growth phase and elevated by RpoS and CRP in the stationary phase.
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Affiliation(s)
- H S Jeong
- Department of Food Science and Technology, Department of Molecular Biotechnology, Institute of Biotechnology, Chonnam National University, Kwang-Ju 500-757, South Korea
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Kang WK, Park C, Yoon HL, Kim WS, Yoon SS, Lee MH, Park K, Kim K, Jeong HS, Kim JA, Nam SJ, Yang JH, Son YI, Baek CH, Han J, Ree HJ, Lee ES, Kim SH, Kim DW, Ahn YC, Huh SJ, Choe YH, Lee JH, Park MH, Kong GS, Park EY, Kang YK, Bang YJ, Paik NS, Lee SN, Kim SH, Kim S, Robbins PD, Tahara H, Lotze MT, Park CH. Interleukin 12 gene therapy of cancer by peritumoral injection of transduced autologous fibroblasts: outcome of a phase I study. Hum Gene Ther 2001; 12:671-84. [PMID: 11426466 DOI: 10.1089/104303401300057388] [Citation(s) in RCA: 99] [Impact Index Per Article: 4.3] [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: 10/17/2022] Open
Abstract
A phase I dose-escalation clinical trial of peritumoral injections of interleukin 12 (IL-12)-transduced autologous fibroblasts was performed in patients with disseminated cancer for whom effective treatment does not exist. The goals of this study were to assess the safety and toxicities as well as the efficacy, and ancillarily the immunomodulatory effects, of peritumoral IL-12 gene transfer. Primary dermal fibroblasts cultured from the patients were transduced with retroviral vector carrying human IL-12 genes (p35 and p40) as well as the neomycin phosphotransferase gene (TFG-hIL-12-Neo). Patients received four injections at intervals of 7 days. Nine patients were enrolled in this dose-escalation study, with secreted IL-12 doses ranging from 300 ng/24 hr for the first three patients to 1000, 3000, and 5000 ng/24 hr for two patients in each subsequent dosage level. Although a definite statement cannot be made, there appears to be perturbation of systemic immunity. Also, the locoregional effects mediated by tumor necrosis factor alpha (TNF-alpha) and CD8+ T cells were observed with tumor regression. Treatment-related adverse events were limited to mild to moderate pain at the injection site; clinically significant toxicities were not encountered. Transient but clear reductions of tumor sizes were observed at the injected sites in four of nine cases, and at noninjected distant sites in one melanoma patient. Hemorrhagic necrosis of tumors was observed in two melanoma patients. These data indicate that gene therapy by peritumoral injection of IL-12-producing autologous fibroblasts is feasible, and promising in patients with advanced cancer.
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Affiliation(s)
- W K Kang
- Cancer Center, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
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Abstract
The effects of nitric oxide on the vestibular function recovery following unilateral labyrinthectomy were studied. Male Sprague-Dawley rats treated with N-omega-nitro-L-arginine methyl ester (L-NAME), a nitric oxide synthase (NOS) inhibitor, were subjected to destruction of the unilateral vestibular apparatus and spontaneous nystagmus was observed. To explore the role of nitric oxide on the potassium current, the whole cell patch clamp technique was applied on isolated medial vestibular nuclear neurons. The frequency of spontaneous nystagmus that appeared in L-NAME-treated rats was higher and maintained longer than in control animals. Potassium currents in the isolated medial vestibular nucleus were inhibited by nitric oxide liberating agents, sodium nitroprusside and S-nitroso-N-acetylpenicillamine. After blockade of calcium dependent potassium currents by high EGTA (11 mM)-containing pipette solution, sodium nitroprusside did not inhibit the outward potassium currents. 8-Bromoguanosine 3,5-cyclic monophosphate, a membrane-permeable cGMP analogue, produced similar effects to inhibit the outward potassium currents as sodium nitroprusside. These results suggest that nitric oxide production after unilateral labyrinthectomy would help to facilitate vestibular compensation by inhibiting calcium-dependent potassium currents through increasing intracellular cyclic GMP, thereby increasing excitability in ipsilateral vestibular nuclear neurons.
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Affiliation(s)
- J S Park
- Chonnam National University Research Institute of Medical Sciences, Kwangju, Korea
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Jeong KC, Jeong HS, Rhee JH, Lee SE, Chung SS, Starks AM, Escudero GM, Gulig PA, Choi SH. Construction and phenotypic evaluation of a Vibrio vulnificus vvpE mutant for elastolytic protease. Infect Immun 2000; 68:5096-106. [PMID: 10948131 PMCID: PMC101747 DOI: 10.1128/iai.68.9.5096-5106.2000] [Citation(s) in RCA: 85] [Impact Index Per Article: 3.5] [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: 11/20/2022] Open
Abstract
Vibrio vulnificus is an opportunistic gram-negative pathogen that commonly contaminates oysters. Predisposed individuals who consume raw oysters can die within days from sepsis, and even otherwise healthy people are susceptible to serious wound infection after contact with contaminated seafood or seawater. Numerous secreted and cell-associated virulence factors have been proposed to account for the fulminating and destructive nature of V. vulnificus infections. Among the putative virulence factors is an elastolytic metalloprotease. We cloned and sequenced the vvpE gene encoding an elastase of V. vulnificus ATCC 29307. The functions of the elastase were assessed by constructing vvpE insertional knockout mutants and evaluating phenotypic changes in vitro and in mice. Although other types of protease activity were still observed in vvpE mutants, elastase activity was completely absent in the mutants and was restored by reintroducing the recombinant vvpE gene. In contrast to previous characterization of elastase as a potential virulence factor, which was demonstrated by injecting the purified protein into animals, inactivation of the V. vulnificus vvpE gene did not affect the ability of the bacteria to infect mice and cause damage, either locally in subcutaneous tissues or systemically in the liver, in both iron-treated and normal mice. Furthermore, a vvpE mutant was not affected with regard to cytolytic activity toward INT407 epithelial cells or detachment of INT407 cells from culture dishes in vitro. Therefore, it appears that elastase is less important in the pathogenesis of V. vulnificus than would have been predicted by examining the effects of administering purified proteins to animals. However, V. vulnificus utilizes a variety of virulence factors; hence, the effects of inactivation of elastase alone could be masked by other compensatory virulence factors.
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Affiliation(s)
- K C Jeong
- Department of Food Science and Technology, Institute of Biotechnology, Chonnam National University, Kwang-Ju, 500-757, South Korea
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31
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Lim YC, Jeong HS, Park JS, Shin JH, Kook YJ. Renal functional responses to centrally administered ouabain in anesthetized rabbits. Methods Find Exp Clin Pharmacol 2000; 22:573-9. [PMID: 11196345] [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: 02/19/2023]
Abstract
The effects of intracerebroventricularly administered ouabain on renal function were studied in rabbits. Ouabain, when given intracerebroventricularly in doses ranging from 0.1 to 10 micrograms/kg, dose-dependently produced antidiuretic, antinatriuretic and antikaliuretic effects, along with decreases in renal perfusion and glomerular filtration rate. Systemic blood pressure also increased significantly in a dose-related fashion. No increase in free water reabsorption was noted. Intravenously administered ouabain (10 micrograms/kg) caused less pronounced antidiuresis and antinatriuresis, with the renal hemodynamics tending slightly to decrease. No significant increment of systemic blood pressure with intravenous ouabain was observed. In rabbits with one kidney denervated and the contralateral left intact, ouabain 10 micrograms/kg i.c.v. produced the typical renal effects on the intact kidney, while the denervated kidney responded with prominent natriuresis and diuresis, showing the maximal response in the second 10-min period after administration. Renal nerve activity increased significantly upon administration of ouabain 10 micrograms/kg i.c.v. and reached a peak at around 10 to 20 min after drug administration, a period in which the most remarkable antidiuresis and antinatriuresis is produced by i.c.v. ouabain. These observations suggest that the antidiuresis and antinatriuresis elicited by centrally administered ouabain results mainly from the decrease of renal hemodynamics, which is caused by the increased renal nerve activity.
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Affiliation(s)
- Y C Lim
- Department of Pharmacology, Medical School and Institute of Medical Sciences, Chonnam National University, Kwangju, Korea.
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32
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Abstract
In the photosynthetic bacterium Rhodobacter capsulatus, a putative membrane-bound complex encoded by the rnfABCDGEH operon is thought to be dedicated to electron transport to nitrogenase. In this study, the whole rnf operon was cloned under the control of the nifH promoter in plasmid pNR117 and expressed in several rnf mutants. Complementation analysis demonstrated that transconjugants which integrated plasmid pNR117 directed effective biosynthesis of a functionally competent complex in R. capsulatus. Moreover, it was found that strains carrying pNR117 displayed nitrogenase activities 50 to 100% higher than the wild-type level. The results of radioactive labeling experiments indicated that the intracellular content of nitrogenase polypeptides was marginally altered in strains containing pNR117, whereas the levels of the RnfB and RnfC proteins present in the membrane were four- and twofold, respectively, higher than the wild-type level. Hence, the enhancement of in vivo nitrogenase activity was correlated with a commensurate overproduction of the Rnf polypeptides. In vitro nitrogenase assays performed in the presence of an artificial electron donor indicated that the catalytic activity of the enzyme was not increased in strains overproducing the Rnf polypeptides. It is proposed that the supply of reductants through the Rnf complex might be rate limiting for nitrogenase activity in vivo. Immunoprecipitation experiments performed on solubilized membrane proteins revealed that RnfB and RnfC are associated with each other and with additional polypeptides which may be components of the membrane-bound complex.
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Affiliation(s)
- H S Jeong
- CEA-Grenoble, Département de Biologie Moléculaire et Structurale, Laboratoire de Biochimie et Biophysique des Systèmes Intégrés, CNRS UMR 314, F-38054 Grenoble Cédex 9, France
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Youn G, Knight BG, Jeong HS, Benton D. Differences in familism values and caregiving outcomes among Korean, Korean American, and White American dementia caregivers. Psychol Aging 1999; 14:355-64. [PMID: 10509692 DOI: 10.1037/0882-7974.14.3.355] [Citation(s) in RCA: 102] [Impact Index Per Article: 4.1] [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: 11/08/2022]
Abstract
Recent theories have suggested that burden and distress among dementia caregivers may be higher in American culture, which emphasizes individualism, and lower in cultures with higher levels of familism. However, immigrants may experience higher levels of burden because of acculturation with attendant values, conflicts and stresses. Forty-four Korean caregivers and 32 Korean American caregivers were compared with 54 White American caregivers on sociodemographic variables, familism, burden, anxiety, and depression. Familism was highest in Korean caregivers and lowest in Whites, with Korean Americans in the middle. Koreans and Korean Americans reported higher levels of burden. Koreans showed higher levels of depression and of anxiety than White American caregivers, with Koreans and Korean Americans higher than Whites on anxiety. These results suggest a need for greater specificity in theories about familism values, with attention to the specific meaning of familism in different cultures.
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Affiliation(s)
- G Youn
- Department of Psychology, Chonnam National University, Kwangju, South Korea
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34
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Park K, Kim K, Jeong HS, Lee JT, Kim WS, Yoon SS, Kang WK, Lee HG, Kim H, Rhee CH, Park CH. Prolonged oral etoposide in combination with intravenous cisplatin (oral EP) for non-small cell lung cancer (NSCLC). Lung Cancer 1998. [DOI: 10.1016/s0169-5002(98)90068-x] [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: 11/28/2022]
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35
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Yoo SM, Jeong HS, Han KJ, Cho SH, Lee HS, Yun HY, Kwon NS, Baek KJ. A new member of alpha 1-adrenoceptor-coupled G alpha h (transglutaminase II) family in pig heart: purification and characterization. Exp Mol Med 1998; 30:81-6. [PMID: 9873827 DOI: 10.1038/emm.1998.12] [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: 11/09/2022] Open
Abstract
We previously reported an identification of a 77-kDa GTP-binding protein that co-purified with the alpha 1-adrenoceptor following ternary complex formation. In the present paper, we report on the purification and characterization of this GTP-binding protein (termed G alpha h5) isolated from pig heart membranes. After solubilization of pig heart membranes with NaCl, G alpha h5 was purified by sequential chromatographies using DEAE-Cellulose, Q-Sepharose, and GTP-agarose columns. The protein displayed high-affinity GTP gamma S binding which is Mg(2+)-dependent and saturable. The relative order of affinity of nucleotide binding by G alpha h5 was GTP > GDP > ITP >> ATP > or = adenyl-5'-yl imidodiphosphate, which was similar to that observed for other heterotrimeric G-proteins involved in receptor signaling. Moreover, the G alpha h5 demonstrated transglutaminase (TGase) activity that was blocked either by EGTA or GTP gamma S. In support of these observations, the G alpha h5 was recognized by a specific antibody to G alpha h7 or TGase II, indicating a homology with G alpha h (TGase II) family. These results demonstrate that 77-kDa G alpha h5 from pig heart is an alpha 1-adrenoceptor-coupled G alpha h (TGase II) family which has species-specificity in molecular mass.
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Affiliation(s)
- S M Yoo
- Department of Biochemistry, College of Medicine, Chung-Ang University, Seoul, Korea
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36
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Jouanneau Y, Jeong HS, Hugo N, Meyer C, Willison JC. Overexpression in Escherichia coli of the rnf genes from Rhodobacter capsulatus--characterization of two membrane-bound iron-sulfur proteins. Eur J Biochem 1998; 251:54-64. [PMID: 9492268 DOI: 10.1046/j.1432-1327.1998.2510054.x] [Citation(s) in RCA: 61] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
The rnf genes of Rhodobacter capsulatus, essential for nitrogen fixation, are thought to encode a system for electron transport to nitrogenase. In the present study, we have attempted to overexpress the rnf genes in Escherichia coli to investigate the molecular properties of the corresponding proteins. Corrections were made to the published DNA sequence of the rnf operon, resulting in the identification of two genes, rnfG and rnfH. The rnfABCDGEH operon thus comprises seven genes and shows similarities in gene arrangement and deduced protein sequences to homologous regions in the genomes of Haemophilus influenzae and E. coli. Four of the rnf gene products were found to be similar in sequence to components of an Na+-dependent NADH:ubiquinone oxidoreductase from Vibrio alginolyticus. Three of the rnf genes were successfully overexpressed in E. coli as His-tagged polypeptides, whereas the products of rnfA, rnfD and rnfE, predicted to be transmembrane proteins, could not be stably maintained in E. coli. The rnfB and rnfC gene products were isolated as two brown proteins with apparent molecular-mass values of 25 kDa and 55 kDa, respectively. RnfB was shown to contain one [2Fe-2S] cluster, based on absorption spectrophotometry, EPR spectroscopy and iron content. Recombinant RnfC contained at least one iron-sulfur cluster, most likely of the [4Fe-4S] type. Unambiguous identification of the prosthetic groups was, however, precluded by the extreme instability of this protein. In R. capsulatus, RnfB and RnfC were found by immunoblot analysis to be tightly bound to the membrane, despite their hydrophilic character. The RnfB and RnfC proteins were absent in mutant strains bearing insertions at various positions within the rnfABCDGEH operon, suggesting that their stability depends on the cosynthesis of the other rnf gene products. We observed that iron limitation during growth resulted in a decrease both in the cellular content of RnfB and in the level of transcription of the rnfABCDGEH operon, indicating that the expression of this operon is regulated as a function of iron availability.
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Affiliation(s)
- Y Jouanneau
- CEA-Grenoble, Département de Biologie Moléculaire et Structurale, Biochimie Microbienne, CNRS UMR 314, France.
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Lee KH, Kwak BY, Kim JH, Yoo SK, Yum SK, Jeong HS. Genetic polymorphism of cytochrome P-4502E1 and mitochondrial aldehyde dehydrogenase in a Korean population. Alcohol Clin Exp Res 1997; 21:953-6. [PMID: 9309300] [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: 02/05/2023]
Abstract
Mitochondrial aldehyde dehydrogenase (ALDH2) is mainly responsible for the oxidation of acetaldehyde generated during alcohol oxidation in vivo. Cytochrome P-4502E1 (CYP2E1), a liver microsomal enzyme, also metabolizes acetaldehyde and ethanol. Genetic polymorphism of ALDH2 and CYP2E1 was investigated among 481 Korean adults. A new restriction fragment-length polymorphism method was developed to determine the genotype of the ALDH2 alleles. This method proved to be simpler and faster than the hybridization method using allele-specific oligonucleotide probes and polymerase chain reaction-directed mutagenesis. The allele frequencies of ALDH2(1) and ALDH2(2) were 0.840 and 0.160, respectively. This allele frequency of ALDH2(2) is less than in Japanese people. Genetic polymorphism of CYP2E1 was investigated using polymerase chain reaction and restriction fragment-length polymorphism. The estimated allele frequencies for c1 and c2 were 0.808 and 0.192.
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Affiliation(s)
- K H Lee
- Biotechnology Laboratory of Jinro Central Research Institute, Kyungki-Do, Korea
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Abstract
This report presents a case of calcifying fibrous pseudotumor arising in the posterior mediastinum of a 54-year-old woman. The histopathologic features of this case were identical to that of calcifying fibrous pseudotumor first designated in 1993. It is a distinctive benign fibrous lesion characterized by the presence of characteristics psammomatous or dystrophic calcification, abundant hyalinized collagen and lymphoplasmacytic cell infiltrate. Immunohistochemically most of the scattered fibroblasts were positive for vimentin, but not for CD-34 and cytokeratins, distinguishing it from solitary fibrous tumor of pleura and desmoplastic mesothelioma. The unusual site of the posterior mediastinum and the old age characterize this case.
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Affiliation(s)
- H S Jeong
- Department of Pathology and Thoracic Surgery, College of Medicine, Chungbuk National University, Cheongiu, Korea
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Hwang YN, Shin S, Park HL, Park SH, Kim U, Jeong HS, Shin E, Kim D. Effect of lattice contraction on the Raman shifts of CdSe quantum dots in glass matrices. Phys Rev B Condens Matter 1996; 54:15120-15124. [PMID: 9985571 DOI: 10.1103/physrevb.54.15120] [Citation(s) in RCA: 38] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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40
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Abstract
Secretory meningioma have been described as a distinct variant of meningioma based on their histologic, immunohistochemical and ultrastructural features of epithelial and secretory differentiation of meningothelial cells with accumulation of secretory material in the form of hyaline inclusion. Secretory meningioma is also a benign tumor having similar biological behaviour to that of typical meningiomas: hence, it is important for it to be recognized and diagnosed correctly to avoid unnecessary radiation and chemotherapy. Here we present a case of secretory meningioma with typical morphologic features. The patient was a 56-year-old woman with bilateral visual disturbance. A well-circumscribed mass was present in the left frontal lobe of cerebrum with surrounding edema. The tumor was composed of whorls of meningothelial cells and abundant intra- and extracellular eosinophilic hyaline inclusions which showed immunoreactivity for epithelial membrane antigen(EMA) and carcinoembryonic antigen(CEA). Ultrastructural features also supported epithelial and secretory differentiation of tumor cells.
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Affiliation(s)
- H S Jeong
- Department of Pathology, Chungbuk National University, College of medicine, Cheongju, Korea
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Jeong HS, Gunji A. The influence of system factors upon the macro-economic efficiency of health care: implications for the health policies of developing and developed countries. Health Policy 1994; 27:113-40. [PMID: 10133919 DOI: 10.1016/0168-8510(94)90076-0] [Citation(s) in RCA: 8] [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: 11/18/2022]
Abstract
This paper aims to clarify the global association of system factors with the attainment of health policy goals, through economic analyses of cross-country data. In the case of OECD (the Organization for Economic Co-operation and Development) data for 1990, the variation in total expenditure on health among 24 countries can be explained by various factors including Gross Domestic Product (GDP). Among these, the variables representing the level of public sector involvement through social protection or public-private mix within a health care system, such as the Public-to-Total Expenditure Ratio, Coverage Rate and Public Cost Sharing, are significantly negative when factors such as GDP are controlled. This suggests that countries attaining higher equity or accessibility are in a better position to gain higher cost-containment or macro-economic efficiency. The results of this study may be helpful for developing countries searching for a long-term health care system as well as for developed countries facing health care system reforms.
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Affiliation(s)
- H S Jeong
- Faculty of Medicine, University of Tokyo, Japan
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42
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Lee J, Lim SC, Jeong HS, Choi KC, Oh BS, Park SS. Long-term effects of pentobarbital anesthesia on the atrial natriuretic peptide system in rats. Proc Soc Exp Biol Med 1994; 205:62-6. [PMID: 8115351 DOI: 10.3181/00379727-205-43678] [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] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
A long-term effect of pentobarbital treatment on the storage and release of atrial natriuretic peptide (ANP) was investigated in rats. The experimental group was treated with pentobarbital (50 mg/kg, ip), and the control group was injected with the vehicle only. They were used one week after the treatment. Male and female rats were used separately to see if there exists a sex difference in the response to pentobarbital. In male rats, the plasma ANP measured in a conscious state was significantly higher in the experimental group than in the control. The ANP content as well as the number of specific granules in the atrial tissue was significantly lower in the experimental group. In response to extracellular volume expansion (VE), amounting up to 5% of the body weight over 30 min, while the plasma ANP increased in the control, it did not significantly change in the experimental group. Urinary responses to the exogenous infusion of ANP did not differ in magnitude between the two groups. In female rats, neither the plasma level nor the atrial content of ANP (or the atrial granularity) was different between the experimental and control groups. Nor did the increase of plasma ANP in response to VE differ in magnitude between the two groups in female rats. These results indicate that pentobarbital may have a long-term effect on the storage and release of ANP.
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Affiliation(s)
- J Lee
- Department of Physiology, Chonnam University Medical School, Kwangju, Korea
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