1.Differences in Pandemic-Related Factors Associated with Alcohol and Substance Use among Korean Adolescents: Nationwide Representative Study.
Hyunju YON ; Sangil PARK ; Jung U SHIN ; Ai KOYANAGI ; Louis JACOB ; Lee SMITH ; Chanyang MIN ; Jinseok LEE ; Rosie KWON ; Guillaume FOND ; Laurent BOYER ; Sunyoung KIM ; Namwoo KIM ; Sang Youl RHEE ; Jae Il SHIN ; Dong Keon YON ; Ho Geol WOO
Biomedical and Environmental Sciences 2023;36(6):542-548
2.Sulfuretin Prevents Obesity and Metabolic Diseases in Diet Induced Obese Mice.
Suji KIM ; No Joon SONG ; Seo Hyuk CHANG ; Gahee BAHN ; Yuri CHOI ; Dong Kwon RHEE ; Ui Jeong YUN ; Jinhee CHOI ; Jeon LEE ; Jae Hyuk YOO ; Donghan SHIN ; Ki Moon PARK ; Hee KANG ; Sukchan LEE ; Jin Mo KU ; Yoon Shin CHO ; Kye Won PARK
Biomolecules & Therapeutics 2019;27(1):107-116
		                        		
		                        			
		                        			The global obesity epidemic and associated metabolic diseases require alternative biological targets for new therapeutic strategies. In this study, we show that a phytochemical sulfuretin suppressed adipocyte differentiation of preadipocytes and administration of sulfuretin to high fat diet-fed obese mice prevented obesity and increased insulin sensitivity. These effects were associated with a suppressed expression of inflammatory markers, induced expression of adiponectin, and increased levels of phosphorylated ERK and AKT. To elucidate the molecular mechanism of sulfuretin in adipocytes, we performed microarray analysis and identified activating transcription factor 3 (Atf3) as a sulfuretin-responsive gene. Sulfuretin elevated Atf3 mRNA and protein levels in white adipose tissue and adipocytes. Consistently, deficiency of Atf3 promoted lipid accumulation and the expression of adipocyte markers. Sulfuretin’s but not resveratrol’s anti-adipogenic effects were diminished in Atf3 deficient cells, indicating that Atf3 is an essential factor in the effects of sulfuretin. These results highlight the usefulness of sulfuretin as a new anti-obesity intervention for the prevention of obesity and its associated metabolic diseases.
		                        		
		                        		
		                        		
		                        			Activating Transcription Factor 3
		                        			;
		                        		
		                        			Adipocytes
		                        			;
		                        		
		                        			Adiponectin
		                        			;
		                        		
		                        			Adipose Tissue, White
		                        			;
		                        		
		                        			Animals
		                        			;
		                        		
		                        			Diet*
		                        			;
		                        		
		                        			Insulin Resistance
		                        			;
		                        		
		                        			Metabolic Diseases*
		                        			;
		                        		
		                        			Mice
		                        			;
		                        		
		                        			Mice, Obese*
		                        			;
		                        		
		                        			Microarray Analysis
		                        			;
		                        		
		                        			Obesity*
		                        			;
		                        		
		                        			RNA, Messenger
		                        			
		                        		
		                        	
3.Retrograde balloon dilation as a therapeutic option for post-gynecologic surgery ureteral stricture followed by ureteroureterostomy: a comparative study regarding stricture length
Geon Woo LIM ; Young Dong YU ; Kyung Hwa CHOI ; Seung Ryeol RHEE ; Dong Soo PARK ; Young Kwon HONG
Yeungnam University Journal of Medicine 2018;35(2):179-186
		                        		
		                        			 BACKGROUND:
		                        			To evaluate the success rate of balloon dilation and the factors possibly influencing the outcomes of balloon dilation for the ureteric strictured portion of ureteroureterostomy (UUS) site in patients with post-gynecologic surgeries.
		                        		
		                        			METHODS:
		                        			A single institution data base was screened for the patients who received balloon dilation for a treatment of ureteral stricture diagnosed after gynecologic surgery. Overall 114 patients underwent primary intra-operative UUS due to ureteral injury during gynecologic surgery. Among them, 102 patients received balloon dilation, and their medical records were retrospectively reviewed. Success of balloon dilation was defined as the condition that requires no further clinical interventions after 6 months from balloon dilation.
		                        		
		                        			RESULTS:
		                        			The ureter injury rate of women treated with open radical abdominal hysterectomy was highest (32 cases, 31.4%). 60 patients (60.8%) showed successful outcomes regarding dilation. All patients underwent technically successful dilation with a full expansion of balloon during the procedure, but 40 patients (39.2%) were clinically unsuccessful as they showed a recurrence of ureteral stricture on the previous balloon dilation site after the first dilation procedure. Univariate logistic regression analyses showed that stricture length >2 cm was a significant predictor of successful dilation (odds ratio, 0.751; 95% confidence interval, 0.634–0.901; p-value, 0.030), but it failed to achieve independent predictor status in multivariate analysis.
		                        		
		                        			CONCLUSION
		                        			Balloon dilation can an effective alternative treatment option for strictured portion of the primary UUS in post-gynecologic surgery patients when its length is < 2 cm. 
		                        		
		                        		
		                        		
		                        	
4.Retrograde balloon dilation as a therapeutic option for post-gynecologic surgery ureteral stricture followed by ureteroureterostomy: a comparative study regarding stricture length
Geon Woo LIM ; Young Dong YU ; Kyung Hwa CHOI ; Seung Ryeol RHEE ; Dong Soo PARK ; Young Kwon HONG
Yeungnam University Journal of Medicine 2018;35(2):179-186
		                        		
		                        			
		                        			BACKGROUND: To evaluate the success rate of balloon dilation and the factors possibly influencing the outcomes of balloon dilation for the ureteric strictured portion of ureteroureterostomy (UUS) site in patients with post-gynecologic surgeries.METHODS: A single institution data base was screened for the patients who received balloon dilation for a treatment of ureteral stricture diagnosed after gynecologic surgery. Overall 114 patients underwent primary intra-operative UUS due to ureteral injury during gynecologic surgery. Among them, 102 patients received balloon dilation, and their medical records were retrospectively reviewed. Success of balloon dilation was defined as the condition that requires no further clinical interventions after 6 months from balloon dilation.RESULTS: The ureter injury rate of women treated with open radical abdominal hysterectomy was highest (32 cases, 31.4%). 60 patients (60.8%) showed successful outcomes regarding dilation. All patients underwent technically successful dilation with a full expansion of balloon during the procedure, but 40 patients (39.2%) were clinically unsuccessful as they showed a recurrence of ureteral stricture on the previous balloon dilation site after the first dilation procedure. Univariate logistic regression analyses showed that stricture length >2 cm was a significant predictor of successful dilation (odds ratio, 0.751; 95% confidence interval, 0.634–0.901; p-value, 0.030), but it failed to achieve independent predictor status in multivariate analysis.CONCLUSION: Balloon dilation can an effective alternative treatment option for strictured portion of the primary UUS in post-gynecologic surgery patients when its length is < 2 cm.
		                        		
		                        		
		                        		
		                        			Constriction, Pathologic
		                        			;
		                        		
		                        			Female
		                        			;
		                        		
		                        			Gynecologic Surgical Procedures
		                        			;
		                        		
		                        			Humans
		                        			;
		                        		
		                        			Hysterectomy
		                        			;
		                        		
		                        			Logistic Models
		                        			;
		                        		
		                        			Medical Records
		                        			;
		                        		
		                        			Multivariate Analysis
		                        			;
		                        		
		                        			Postoperative Complications
		                        			;
		                        		
		                        			Recurrence
		                        			;
		                        		
		                        			Retrospective Studies
		                        			;
		                        		
		                        			Ureter
		                        			
		                        		
		                        	
5.Induction chemotherapy in head and neck squamous cell carcinoma of the paranasal sinus and nasal cavity: a role in organ preservation.
Chan Young OCK ; Bhumsuk KEAM ; Tae Min KIM ; Doo Hee HAN ; Tae Bin WON ; Se Hoon LEE ; J Hun HAH ; Tack Kyun KWON ; Dong Wan KIM ; Dong Young KIM ; Chae Seo RHEE ; Hong Gyun WU ; Myung Whun SUNG ; Dae Seog HEO
The Korean Journal of Internal Medicine 2016;31(3):570-578
		                        		
		                        			
		                        			BACKGROUND/AIMS: The role of induction chemotherapy (IC) for eyeball preservation has not been established in head and neck squamous cell carcinoma (HNSCC) of the paranasal sinus and nasal cavity (PNSNC). Periorbital involvement frequently leads to eyeball exenteration with a margin of safety. We evaluated the treatment outcomes, including survival and eyeball preservation, of patients who received IC for HNSCC of the PNSNC. METHODS: We reviewed 21 patients diagnosed with HNSCC of the PNSNC who were treated with IC. We analyzed response, eyeball preservation rate, and overall survival. RESULTS: Tumors were located in the paranasal sinus (n = 14) or nasal cavity (n = 7). Most patients had stage T4a (n = 10) or T4b (n = 7) disease. More than half of the patients received a chemotherapy regimen of docetaxel, fluorouracil, and cisplatin (n = 11). Thirteen patients (61.9%) achieved a partial response after IC and 15 patients (71.4%) achieved T down-staging. Among 17 patients with stage T4 disease, which confers a high risk of orbital exenteration, 14 (82.4%) achieved preservation of the involved eye. The 3-year overall survival (OS) rate of patients who achieved a partial response to IC was 84.6%. The 3-year OS rate of patients with stable disease or disease progression after IC was 25.0% (p = 0.038). CONCLUSIONS: IC could be considered for down-staging patients with advanced T-stage disease. It could also be a reasonable option for eyeball preservation in locally advanced HNSCC of the PNSNC.
		                        		
		                        		
		                        		
		                        			Carcinoma, Squamous Cell*
		                        			;
		                        		
		                        			Cisplatin
		                        			;
		                        		
		                        			Disease Progression
		                        			;
		                        		
		                        			Drug Therapy
		                        			;
		                        		
		                        			Fluorouracil
		                        			;
		                        		
		                        			Head and Neck Neoplasms
		                        			;
		                        		
		                        			Head*
		                        			;
		                        		
		                        			Humans
		                        			;
		                        		
		                        			Induction Chemotherapy*
		                        			;
		                        		
		                        			Nasal Cavity*
		                        			;
		                        		
		                        			Neck*
		                        			;
		                        		
		                        			Orbit
		                        			;
		                        		
		                        			Orbit Evisceration
		                        			;
		                        		
		                        			Organ Preservation*
		                        			;
		                        		
		                        			Paranasal Sinuses
		                        			
		                        		
		                        	
6.Establishment of hydrochloric acid/lipopolysaccharide-induced pelvic inflammatory disease model.
Yeonsu OH ; Jaehun LEE ; Hyeon Cheol KIM ; Tae Wook HAHN ; Byung Il YOON ; Jeong Hee HAN ; Yong Soo KWON ; Joung Jun PARK ; Deog Bon KOO ; Ki Jong RHEE ; Bae Dong JUNG
Journal of Veterinary Science 2016;17(3):413-419
		                        		
		                        			
		                        			Pelvic inflammatory disease (PID), which is one of the most problematic complications experienced by women with sexually transmitted diseases, frequently causes secondary infections after reproductive abnormalities in veterinary animals. Although the uterus is self-protective, it becomes fragile during periods or pregnancy. To investigate PID, bacteria or lipopolysaccharide (LPS) extracted from gram negative bacteria has been used to induce the disease in several animal models. However, when LPS is applied to the peritoneum, it often causes systemic sepsis leading to death and the PID was not consistently demonstrated. Hydrochloric acid (HCl) has been used to induce inflammation in the lungs and stomach but not tested for reproductive organs. In this study, we developed a PID model in mice by HCl and LPS sequential intracervical (i.c.) administration. The proinflammatory cytokines, interleukin (IL)-1β, IL-6 and tumor necrosis factor-α, were detected in the mouse uterus by western blot analysis and cytokine enzyme-linked immunosorbent assay after HCl (25 mg/kg) administration i.c. followed by four LPS (50 mg/kg) treatments. Moreover, mice exhibited increased infiltration of neutrophils in the endometrium and epithelial layer. These results suggest that ic co-administration of HCl and LPS induces PID in mice. This new model may provide a consistent and reproducible PID model for future research.
		                        		
		                        		
		                        		
		                        			Animals
		                        			;
		                        		
		                        			Bacteria
		                        			;
		                        		
		                        			Blotting, Western
		                        			;
		                        		
		                        			Coinfection
		                        			;
		                        		
		                        			Cytokines
		                        			;
		                        		
		                        			Endometrium
		                        			;
		                        		
		                        			Enzyme-Linked Immunosorbent Assay
		                        			;
		                        		
		                        			Female
		                        			;
		                        		
		                        			Gram-Negative Bacteria
		                        			;
		                        		
		                        			Humans
		                        			;
		                        		
		                        			Hydrochloric Acid
		                        			;
		                        		
		                        			Inflammation
		                        			;
		                        		
		                        			Interleukin-6
		                        			;
		                        		
		                        			Interleukins
		                        			;
		                        		
		                        			Lung
		                        			;
		                        		
		                        			Mice
		                        			;
		                        		
		                        			Models, Animal
		                        			;
		                        		
		                        			Necrosis
		                        			;
		                        		
		                        			Neutrophils
		                        			;
		                        		
		                        			Pelvic Inflammatory Disease*
		                        			;
		                        		
		                        			Peritoneum
		                        			;
		                        		
		                        			Pregnancy
		                        			;
		                        		
		                        			Sepsis
		                        			;
		                        		
		                        			Sexually Transmitted Diseases
		                        			;
		                        		
		                        			Stomach
		                        			;
		                        		
		                        			Uterus
		                        			
		                        		
		                        	
7.Developing and Application of a Novel Triage Tag.
Seung Dong LEE ; Minjung Kathy CHAE ; Sung Yeon HWANG ; Tae Rim LEE ; Won Chul CHA ; Tae Gun SHIN ; Min Seob SIM ; Ik Joon JO ; Keun Jeong SONG ; Joong Eui RHEE ; Yeon Kwon JEONG
Journal of the Korean Society of Emergency Medicine 2016;27(5):414-421
		                        		
		                        			
		                        			PURPOSE: Triage tags help prioritize the treatment for disaster patients based on the severity of the illness and help distribute limited resources during a time of disaster. In this study, we developed a novel triage tag and evaluated its feasibility during a hospital-based disaster drill. METHODS: For the first stage, we developed a new triage tag. The most commonly used triage tags (Medical Emergency Triage-TAG and SMART tag) were analyzed. We reassembled their advantages and invented a novel triage tag (NT tag). The second stage involved an evaluation of the quality of NT tag. The NT tag was used in a hospital-based disaster drill held in a single center with 22 mock patients. After the drill, hospital staffs were asked to complete a questionnaire which included visibility, comprehensibility, and ease of use with respect to the new NT tag. A five-category Likert scale was used to quantify the answer. RESULTS: The NT tag was successfully developed considering 6 quality indexes: visibility, expandability, flexibility, solidity, space, and fixity. Forty-two out of ninety (46.7%) subjects answered the questionnaire. Approximately 21% of participants had previous disaster drill experience and 33% had previous education of the SMART triage system. The visibility scale of the severity category was on average 3.3 (standard deviation (SD): 1.0), the comprehensiveness of the severity category was 3.6 (SD:0.9), the ease to understand patient information was 2.2-4.2, the ease to follow up symptoms and vital signs was 2.3-4.1. Eighty and percent of participants preferred to use the NT tag in a future disaster situation or disaster drill. CONCLUSION: We successfully developed a novel triage tag. The NT tag showed moderate feasibility.
		                        		
		                        		
		                        		
		                        			Disasters
		                        			;
		                        		
		                        			Education
		                        			;
		                        		
		                        			Emergencies
		                        			;
		                        		
		                        			Follow-Up Studies
		                        			;
		                        		
		                        			Humans
		                        			;
		                        		
		                        			Pliability
		                        			;
		                        		
		                        			Triage*
		                        			;
		                        		
		                        			Vital Signs
		                        			
		                        		
		                        	
8.Synchronous, Orthotopic Occurrence of Early Gastric Cancer with Gastrointestinal Stromal Tumor that Mimicked Advanced Gastric Cancer.
Dong Woo SHIN ; Hyunsoo KIM ; Hyunji KIM ; Moon Hyuk KWON ; Sang Dong KIM ; Soo Hyun BAE ; Jae Choon KWON ; Jung Ahn RHEE ; Man Hoon HAN
The Korean Journal of Helicobacter and Upper Gastrointestinal Research 2013;13(3):182-188
		                        		
		                        			
		                        			In recent years, the synchronous occurrence of two adjacent but histologically distinct tumors arising in the same organ has been reported. The simultaneous development of gastric adenocarcinoma and gastrointestinal stromal tumor (GIST) is very uncommon. The question raised was whether such a coexistence is a simple incidental finding or whether the two neighboring tumors are caused by a same unknown carcinogenic agent. Many doctors may have an interest in this rare condition and we expect further studies will be done in order to determine if there is any association between the two different tumors. We report a unique case of a synchronous, orthotopic occurrence of an early gastric cancer with GIST in the same location that mimicked advanced gastric cancer.
		                        		
		                        		
		                        		
		                        			Adenocarcinoma
		                        			;
		                        		
		                        			Gastrointestinal Stromal Tumors
		                        			;
		                        		
		                        			Incidental Findings
		                        			;
		                        		
		                        			Stomach Neoplasms
		                        			
		                        		
		                        	
9.The Value of Neutrophil-Lymphocyte Count Ratio for Disease Severity in Nursing Home Acquired Pneumonia Patients.
Dong Yoon RHEE ; Sang Hyun PARK ; Han Jo CHOI ; Mi Kyung KWON ; Dong Hui CHO
Journal of the Korean Geriatrics Society 2013;17(4):213-218
		                        		
		                        			
		                        			BACKGROUND: We evaluated the value of neutrophil-lymphocyte count ratio (NLCR) in patients admitted to the Emergency Department (ED) with suspected nursing home acquired pneumonia (NHAP). METHODS: From May 2011 to January 2013, 116 patients admitted to the ED with suspected NHAP were retrospectively studied. The clinical characteristics, C-reactive protein (CRP), white blood cell count, neutrophil count, lymphocyte count, and NLCR were assessed. CURB-65 score was used to calculate disease severity. General ward or intensive care unit (ICU) admissions, and 72-hour and 30-day mortality for each infection marker was assessed. RESULTS: The 116 patients had a median age of 77 years. As the CURB-65 score increased from 0-1 (low risk), to 2-3 (moderate risk), and to 4-5 (high risk), the NLCR consistently increased (mean, 6.9, 8.89, and 16.22, respectively). The difference between the moderate and high risk groups was significant (p=0.008). The NLCR (mean+/-standard deviation) was high in patients with NHAP (10.28+/-8.81) and increased even more for patients admitted to the ICU (15.69+/-14.81) or who died within 72-hour (15.63+/-9.57). NLCR showed the trend of higher value in ICU admission (p=0.072), and CRP was significantly different between ICU and general ward admission (p=0.007). CONCLUSION: NLCR at ED admission correlated with NHAP severity and was comparable to the traditional infection marker. NLCR can be assessed simply and added to the assessment tools to determine the severity of pneumonia during ED admission.
		                        		
		                        		
		                        		
		                        			C-Reactive Protein
		                        			;
		                        		
		                        			Emergencies
		                        			;
		                        		
		                        			Humans
		                        			;
		                        		
		                        			Intensive Care Units
		                        			;
		                        		
		                        			Leukocyte Count
		                        			;
		                        		
		                        			Lymphocyte Count
		                        			;
		                        		
		                        			Mortality
		                        			;
		                        		
		                        			Neutrophils
		                        			;
		                        		
		                        			Nursing Homes*
		                        			;
		                        		
		                        			Nursing*
		                        			;
		                        		
		                        			Patients' Rooms
		                        			;
		                        		
		                        			Pneumonia*
		                        			;
		                        		
		                        			Retrospective Studies
		                        			
		                        		
		                        	
10.Inactivated pep27 mutant as an effective mucosal vaccine against a secondary lethal pneumococcal challenge in mice.
Sang Yoon CHOI ; Thao Dang Hien TRAN ; David E BRILES ; Dong Kwon RHEE
Clinical and Experimental Vaccine Research 2013;2(1):58-65
		                        		
		                        			
		                        			PURPOSE: A pep27 mutant may be able to elicit mucosal immunity against pneumococcal diseases, and could be employed as an inexpensive attenuated vaccine. However, this particular mutant contains an erythromycin-resistance marker. The purpose of the current study is to develop a markerless pep27 mutant and assess whether this inactivated mutant is able to induce mucosal immunity. MATERIALS AND METHODS: Mice were vaccinated intranasally with the inactivated markerless pep27 mutant every 2 weeks for a total of three times, after which time serum samples were analyzed for antibody titers. The mice were then challenged with a lethal D39 strain and their survival time was measured. The cross-reactivity of the antisera against pep27 was also compared to other mutant serotypes. RESULTS: Intranasal immunization of mice with the inactivated markerless pep27 mutant provides effective protection and rapidly cleared bacterial colonization in vivo. Moreover, antisera raised against the pep27 mutant may cross-react with several other serotype strains. CONCLUSION: Intranasal immunization with the inactivated pep27 mutant may be able to provide mucosal immunity, and could represent an efficient mucosal vaccine.
		                        		
		                        		
		                        		
		                        			Animals
		                        			;
		                        		
		                        			Colon
		                        			;
		                        		
		                        			Immune Sera
		                        			;
		                        		
		                        			Immunity, Mucosal
		                        			;
		                        		
		                        			Immunization
		                        			;
		                        		
		                        			Mice
		                        			;
		                        		
		                        			Sprains and Strains
		                        			;
		                        		
		                        			Streptococcus pneumoniae
		                        			
		                        		
		                        	
            
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