PURPOSE: Hemorrhagic fever with renal syndrome (HFRS) is an acute febrile disease caused by Hantaan virus. It is believed that various kinds of inflammatory mediators and cytokines might be involved in its pathogenesis. METHODS: We studied the expression of adhesion molecules, including ICAM-1 and VCAM-1 on Hantaan virus-infected human umbilical vein endothelial cells (HUVECs) with ELISA. RESULTS: Hantaan antigen increased gradually 48 hours after virus infection, ICAM-1 increased rapidly 3 hours after virus infection and VCAM-1 increased rapidly 4 hours after infection, a little later than ICAM-1. The patterns of the change of reaction were similar between the different concentrations of virus solution that had been adsorbed on HUVECs, but the expression of ICAM-1 or VCAM-1 was greater when HUVECs were infected with stock virus rather than when infected with tenfold diluted virus. CONCLUSION: We report the quantification using ELISA of ICAM-1 and VCAM-1 expression of HUVECs that have been infected by Hantaan virus. Increase of their expression would play an important role in the pathogenesis of HFRS.
Cytokines ; Endothelial Cells ; Enzyme-Linked Immunosorbent Assay ; Hantaan virus* ; Hemorrhagic Fever with Renal Syndrome ; Human Umbilical Vein Endothelial Cells* ; Humans* ; Intercellular Adhesion Molecule-1* ; Vascular Cell Adhesion Molecule-1*

PURPOSE: The purpose of this study was to investigate the feasibility of regenerative therapy with a collagenated bone graft and resorbable membrane in intrabony defects, and to evaluate the effects of the novel extracellular matrix (ECM)-based membrane clinically and radiologically. METHODS: Periodontal tissue regeneration procedure was performed using an ECM-based resorbable membrane in combination with a collagenated bovine bone graft in intrabony defects around the teeth and implants. A novel extracellular matrix membrane (NEM) and a widely-used membrane (WEM) were randomly applied to the test group and the control group, respectively. Cone-beam computed tomography images were obtained on the day of surgery and 6 months after the procedure. Alginate impressions were taken and plaster models were made 1 week and 6 months postoperatively. RESULTS: The quantity of bone tissue, the dimensional changes of the surgically treated intrabony defects, and the changes in width and height below the grafted bone substitutes showed no significant difference between the test and control groups at the 6-month examination. CONCLUSIONS: The use of NEM for periodontal regeneration with a collagenated bovine bone graft showed similar clinical and radiologic results to those obtained using WEM.
Bone and Bones ; Bone Regeneration ; Bone Substitutes ; Clinical Study* ; Collagen* ; Cone-Beam Computed Tomography ; Extracellular Matrix ; Guided Tissue Regeneration ; Imaging, Three-Dimensional ; Membranes* ; Regeneration* ; Tooth ; Transplants*

PURPOSE: The aim of this study was to evaluate the effectiveness of powered toothbrushes for plaque control in patients with peri-implant mucositis, in comparison with manual toothbrushes. METHODS: This randomized, prospective, controlled, clinical parallel study compared the efficacy of manual and powered toothbrushes for plaque control in implant restorations. Patients with bleeding on probing, no residual pocket depth (as indicated by a pocket probing depth > or = 5 mm), and no radiological peri-implant bone loss were eligible for this study. Patients were requested to complete a questionnaire describing their oral hygiene habits. The duration and frequency of tooth brushing were recorded by subjects in order to assess their compliance. Clinical parameters, including the modified plaque index (mPI), the modified sulcus bleeding index (mSBI), and clinical photographs (buccal and lingual views) were recorded at baseline and at one-month and two-month follow-up visits. RESULTS: Statistically significant differences between patients who used manual toothbrushes and those who used powered toothbrushes were found regarding the frequency of tooth brushing per day and the duration of brushing at one-month and two-month follow-up visits, while no statistically significant differences were found relating to other oral hygiene habits. A statistically significant difference in patient compliance for tooth brushing was found at one month, while no difference was found at two months. Statistically significant decreases in the mPI and the mSBI were observed in both groups from baseline to the one- and two-month follow-ups. The overall reduction of these parameters was not significantly different between the two groups, except for mPI reduction between baseline and one month of follow-up. CONCLUSIONS: Sonic-powered toothbrushes may be a useful device for plaque control in patients with peri-implant mucositis.
Compliance ; Dental Implants ; Dental Plaque ; Follow-Up Studies ; Hemorrhage ; Humans ; Mucositis* ; Oral Hygiene ; Patient Compliance ; Prospective Studies ; Surveys and Questionnaires ; Tooth

BACKGROUND AND PURPOSE: The positive effects of galantamine on cognition and activities of daily living (ADL) in Alzheimer's disease (AD) are thought to be mediated via improvements in attention. The purpose of this study was to determine the effect of galantamine on attention in AD patients using a computerized attention test and to elucidate the relationship between improvements in attention and change in cognition and ADL. METHODS: In this multicenter, open-label, prospective study, patients with mild to moderate AD received galantamine and then submitted to computerized attention tests, the Alzheimer's Disease Assessment Scale-cognitive subscale, and instrumental ADL (IADL) at baseline, 4 weeks, and 12 weeks. The differences in reaction time on computerized tests were explored relative to the changes in cognition and IADL. RESULTS: After 12 weeks of taking the trial medication there was a significant reduction from baseline levels in the choice reaction time (baseline, 5,216+/-3,650 sec; 12 weeks, 4,139+/-2,920 sec; p<0.01) and the simple reaction time (baseline, 1,089+/-782 sec; 12 weeks, 908+/-606 sec; p<0.01). Correlation analyses of changes in choice or simple reaction times relative to cognition and ADL measures yielded no significant associations. The improvement in attention observed at 4 weeks of galantamine treatment was not associated with any significant changes in outcome measures at the end of trial. CONCLUSIONS: This study found no significant association between the improvement in attention after treatment with galantamine and changes in cognition and ADL in patients with mild to moderate AD, despite the significant improvement in attention over the course of the treatment.
Activities of Daily Living* ; Alzheimer Disease* ; Cognition* ; Galantamine* ; Humans ; Outcome Assessment (Health Care) ; Prospective Studies ; Reaction Time

PURPOSE: The aim of this study was to radiographically and clinically compare the effect of extracellular matrix (ECM) membranes on dimensional alterations following a ridge preservation procedure. METHODS: One of 2 different ECM membranes was applied during a ridge preservation procedure. A widely used ECM membrane (WEM; Bio-Gide, Geistlich Biomaterials, Wolhusen, Switzerland) was applied in the treatment group and a newly developed ECM membrane (NEM; Lyso-Gide, Oscotec Inc., Seongnam, Korea) was applied in the control group. Cone-beam computed tomography (CBCT) scans and alginate impressions were obtained 1 week and 6 months after the ridge preservation procedure. Results were analyzed using the independent t-test and the nonparametric Mann-Whitney U test. RESULTS: There were no significant differences between the ECM membranes in the changes in the dimension, width, and height of the extraction socket or the quantity of bone tissue. CONCLUSIONS: The NEM showed comparable clinical and radiographic results to the WEM following the ridge preservation procedure.
Alveolar Bone Grafting ; Alveolar Process* ; Biocompatible Materials ; Bone and Bones ; Bone Regeneration ; Clinical Study* ; Cone-Beam Computed Tomography ; Extracellular Matrix ; Gyeonggi-do ; Imaging, Three-Dimensional ; Membranes* ; Tooth Socket

PURPOSE: The purpose of this study was to improve transportation and distribution of mass-casualty patients by reviewing the subway fire that occurred in Daegu on 18 February 2003. METHODS: We used the reports of the Daegu Emergency Medical Information Center and the medical records of each hospital to analyze retrospectively 199 patients who were transported to 22 initial receiving hospitals. We evaluated the appropriateness of transportation based on the distances of transportation, the capability of the receiving hospitals, and the severity of patients. Using the SAS program(version 6.12), the collected data was analyzed by frequency and x(2) test. RESULTS: The more severe the patients were, the nearer and larger the receiving hospitals were. There was no accurate triage at the scene, but the distribution of patients was good because members of Daegu Emergency Medical Information Center were dispatched to the scene and because communications between the scene and receiving hospitals were continuous. CONCLUSION: We do not expect disasters, but they happen. All we can do is plan and prepare appropriate responses for disasters. Appropriate transportation and distribution of patients based on triage is an important aspect of early disaster response.
Daegu* ; Disasters ; Emergencies ; Fires* ; Humans ; Information Centers ; Medical Records ; Railroads* ; Retrospective Studies ; Transportation* ; Triage

BACKGROUND/AIMS: Autologous stem cell transplantation (ASCT) has become the treatment of choice for patients with multiple myeloma (MM). Studies have shown that maintenance treatment with interferon-alpha is associated with improved survival rates following ASCT. However, despite these recent advances in regimes, relapses are inevitable; thus, the prediction of relapse following ASCT requires assessment. METHODS: We retrospectively analyzed 39 patients who received ASCT between 2003 and 2008. All patients received chemotherapy with vincristine, adriamycin, and dexamethasone (VAD), and ASCT was performed following high-dose melphalan conditioning therapy. We evaluated the influence of the post-transplant day +14 (D+14) bone marrow plasma cell percent (BMPCp) (> or = 2 vs. < 2%), international scoring system (ISS) stage (II vs. III), response after 3 cycles of VAD therapy (complete response [CR] vs. non-CR), deletion of chromosome 13q (del[13q]) (presence of the abnormality vs. absence), and BMPCp at diagnosis (> or = 50 vs. < 50%) on progression-free survival (PFS) and overall survival (OS). RESULTS: During the median follow-up of 28.0 months, the median PFS and OS were 29.1 and 42.1 months, respectively. By univariate analysis, ISS stage III at diagnosis, BMPCp > or = 50% at diagnosis, CR after 3 cycles of VAD therapy, del (13q) by fluorescence in situ hybridization, and BMPCp > or = 2% at post-transplant D+14 were correlated with PFS and OS. A multivariate analysis revealed that a post-transplant D+14 BMPCp > or = 2% (PFS, hazard ratio [HR] = 4.426, p = 0.008; OS, HR = 3.545, p = 0.038) and CR after 3 cycles of VAD therapy (PFS, HR = 0.072, p = 0.014; OS, HR = 0.055, p = 0.015) were independent prognostic parameters. CONCLUSIONS: Post-transplant D+14 BMPCp is a useful parameter for predicting the outcome for patients with MM receiving ASCT.
Adult ; Antineoplastic Combined Chemotherapy Protocols/therapeutic use ; Bone Marrow/*pathology ; Combined Modality Therapy ; Female ; *Hematopoietic Stem Cell Transplantation ; Humans ; Male ; Middle Aged ; Multiple Myeloma/mortality/pathology/*therapy ; Plasma Cells/*pathology ; Predictive Value of Tests ; Retrospective Studies ; Transplantation, Autologous

BACKGROUND: Bortezomib has significant activity in treating multiple myeloma (MM). The risk of herpes zoster (HZ) has been reported to increase significantly with bortezomib treatment, but the predisposing factors for HZ are not clear. This study is a retrospective analysis of the relevant risk factors for HZ in Korean MM patients treated with bortezomib. METHODS: Sixty-six patients with refractory or relapsed MM who underwent chemotherapy with bortezomib were included in the study. Prophylactic antiviral drugs were not used for treatment. The following parameters were reviewed: age, gender, stage and type of MM, extent of previous treatment, history of HZ, duration from the time of diagnosis to the time of bortezomib treatment initiation, and absolute lymphocyte counts (ALC) at the time of bortezomib treatment initiation. RESULTS: The incidence of HZ was 16.7%. There were no intergroup differences between the HZ-positive and the HZ-negative groups with regard to a history of HZ, number of previous treatments, and exposure to steroids before bortezomib treatment. The median duration from the time of MM diagnosis to the time of bortezomib treatment initiation in the HZ-positive group was significantly shorter than that in the HZ-negative group. The median ALC at the time of bortezomib initiation in the HZ-positive group was significantly lower than that in the HZ-negative group. CONCLUSION: Bortezomib itself might act as a risk factor for HZ by inhibiting cell-mediated immunity, and patients with low ALC at the time of bortezomib treatment initiation were at greater risk of HZ during bortezomib treatment.
Antiviral Agents ; Boronic Acids ; Herpes Zoster ; Humans ; Immunity, Cellular ; Incidence ; Lymphocyte Count ; Multiple Myeloma ; Protease Inhibitors ; Pyrazines ; Retrospective Studies ; Risk Factors ; Steroids ; Bortezomib

Purpose: This study aimed to evaluate the long-term cumulative survival rate (CSR) of dental implants with micro-threads in the neck over a 10-year follow-up period and to examine the factors influencing the survival rate of dental implants. Methods: This retrospective study was based on radiographic and dental records. In total, 151 patients received 490 Oneplant ® dental implants with an implant neck micro-thread design during 2006–2010 in the Department of Periodontology of Seoul National University Dental Hospital. Implant survival was evaluated using Kaplan–Meier analysis. Cox proportional hazard regression analysis was used to identify the factors influencing implant failure. Results: Ten out of 490 implants (2.04%) failed due to fixture fracture. The CSR of the implants was 97.9%, and no significant difference was observed in the CSR between externaland internal-implant types (98.2% and 97.6%, respectively,P=0.670). In Cox regression analysis, 2-stage surgery significantly increased the risk of implant failure (hazard ratio: 4.769, P=0.039). There were no significant differences in influencing factors, including sex, age, implant diameter, length, fixture type, location, surgical procedure, bone grafting, and restoration type. Conclusions Within the limitations of this retrospective study, the micro-thread design of the implant neck was found to be favorable for implant survival, with stable clinical outcomes.