1.Poor Prognosis of Pneumococcal Co-Infection in Hospitalized Patients with COVID-19: A Propensity Score-Matched Analysis
Soyoon HWANG ; Eunkyung NAM ; Shin-Woo KIM ; Hyun-Ha CHANG ; Yoonjung KIM ; Sohyun BAE ; Nan Young LEE ; Yu Kyung KIM ; Ji Sun KIM ; Han Wook PARK ; Joon Gyu BAE ; Juhwan JEONG ; Ki Tae KWON
Infection and Chemotherapy 2025;57(1):172-178
		                        		
		                        			
		                        			 The impact of Streptococcus pneumoniae coinfection on coronavirus disease 2019 (COVID-19) prognosis remains uncertain. We conducted a retrospective analysis of patients hospitalized with COVID-19 who underwent a pneumococcal urinary antigen (PUA) test to assess its clinical utility. Results showed that PUA-positive patients required more oxygen support, high-flow nasal cannula, and dexamethasone compared to PUA-negative patients.Furthermore, the significantly higher incidence of a National Early Warning Score ≥5 in the PUA-positive group (P<0.001) suggests that a positive PUA test is associated with a severe disease course. However, no significant difference in mortality was observed between the two groups, and antibiotics were used in almost all patients (96.2%). While the PUA test may help guide antibiotic use in COVID-19 patients, its interpretation should be approached with caution. 
		                        		
		                        		
		                        		
		                        	
2.Poor Prognosis of Pneumococcal Co-Infection in Hospitalized Patients with COVID-19: A Propensity Score-Matched Analysis
Soyoon HWANG ; Eunkyung NAM ; Shin-Woo KIM ; Hyun-Ha CHANG ; Yoonjung KIM ; Sohyun BAE ; Nan Young LEE ; Yu Kyung KIM ; Ji Sun KIM ; Han Wook PARK ; Joon Gyu BAE ; Juhwan JEONG ; Ki Tae KWON
Infection and Chemotherapy 2025;57(1):172-178
		                        		
		                        			
		                        			 The impact of Streptococcus pneumoniae coinfection on coronavirus disease 2019 (COVID-19) prognosis remains uncertain. We conducted a retrospective analysis of patients hospitalized with COVID-19 who underwent a pneumococcal urinary antigen (PUA) test to assess its clinical utility. Results showed that PUA-positive patients required more oxygen support, high-flow nasal cannula, and dexamethasone compared to PUA-negative patients.Furthermore, the significantly higher incidence of a National Early Warning Score ≥5 in the PUA-positive group (P<0.001) suggests that a positive PUA test is associated with a severe disease course. However, no significant difference in mortality was observed between the two groups, and antibiotics were used in almost all patients (96.2%). While the PUA test may help guide antibiotic use in COVID-19 patients, its interpretation should be approached with caution. 
		                        		
		                        		
		                        		
		                        	
3.Poor Prognosis of Pneumococcal Co-Infection in Hospitalized Patients with COVID-19: A Propensity Score-Matched Analysis
Soyoon HWANG ; Eunkyung NAM ; Shin-Woo KIM ; Hyun-Ha CHANG ; Yoonjung KIM ; Sohyun BAE ; Nan Young LEE ; Yu Kyung KIM ; Ji Sun KIM ; Han Wook PARK ; Joon Gyu BAE ; Juhwan JEONG ; Ki Tae KWON
Infection and Chemotherapy 2025;57(1):172-178
		                        		
		                        			
		                        			 The impact of Streptococcus pneumoniae coinfection on coronavirus disease 2019 (COVID-19) prognosis remains uncertain. We conducted a retrospective analysis of patients hospitalized with COVID-19 who underwent a pneumococcal urinary antigen (PUA) test to assess its clinical utility. Results showed that PUA-positive patients required more oxygen support, high-flow nasal cannula, and dexamethasone compared to PUA-negative patients.Furthermore, the significantly higher incidence of a National Early Warning Score ≥5 in the PUA-positive group (P<0.001) suggests that a positive PUA test is associated with a severe disease course. However, no significant difference in mortality was observed between the two groups, and antibiotics were used in almost all patients (96.2%). While the PUA test may help guide antibiotic use in COVID-19 patients, its interpretation should be approached with caution. 
		                        		
		                        		
		                        		
		                        	
4.The Clinical Characteristics and Outcomes of Patients with Moderate-to-Severe Coronavirus Disease 2019 Infection and Diabetes in Daegu, South Korea
Mi Kyung KIM ; Jae-Han JEON ; Sung-Woo KIM ; Jun Sung MOON ; Nan Hee CHO ; Eugene HAN ; Ji Hong YOU ; Ji Yeon LEE ; Miri HYUN ; Jae Seok PARK ; Yong Shik KWON ; Yeon-Kyung CHOI ; Ki Tae KWON ; Shin Yup LEE ; Eon Ju JEON ; Jin-Woo KIM ; Hyo-Lim HONG ; Hyun Hee KWON ; Chi Young JUNG ; Yin Young LEE ; Eunyeoung HA ; Seung Min CHUNG ; Jian HUR ; June Hong AHN ; Na-young KIM ; Shin-Woo KIM ; Hyun Ha CHANG ; Yong Hoon LEE ; Jaehee LEE ; Keun-Gyu PARK ; Hyun Ah KIM ; Ji-Hyun LEE
Diabetes & Metabolism Journal 2020;44(4):602-613
		                        		
		                        			
		                        			  Coronavirus disease 2019 (COVID-19) is a global pandemic that had affected more than eight million people worldwide by June 2020. Given the importance of the presence of diabetes mellitus (DM) for host immunity, we retrospectively evaluated the clinical characteristics and outcomes of moderate-to-severe COVID-19 in patients with diabetes. We conducted a multi-center observational study of 1,082 adult inpatients (aged ≥18 years) who were admitted to one of five university hospitals in Daegu because of the severity of their COVID-19-related disease. The demographic, laboratory, and radiologic findings, and the mortality, prevalence of severe disease, and duration of quarantine were compared between patients with and without DM. In addition, 1:1 propensity score (PS)-matching was conducted with the DM group. Compared with the non-DM group ( DM is a significant risk factor for COVID-19 severity and mortality. Our findings imply that COVID-19 patients with DM, especially if elderly, require special attention and prompt intensive care.
		                        		
		                        	
5.Clinical and Hematological Effects of Tocilizumab on Serum Hepcidin, Anemia Response and Disease Activity in Patients with Active Rheumatoid Arthritis.
Ki Jeong PARK ; Hye Mi JIN ; Young Nan CHO ; Jeong Hwa KANG ; Hyun Ju JUNG ; Ji Hyoun KANG ; Ji Eun KIM ; Yi Rang YIM ; Jeong Won LEE ; Kyung Eun LEE ; Dong Jin PARK ; Tae Jong KIM ; Shin Seok LEE ; Seung Jung KEE ; Yong Wook PARK
Journal of Rheumatic Diseases 2016;23(1):37-46
		                        		
		                        			
		                        			OBJECTIVE: The purpose of this study is to evaluate the clinical and hematological effects of tocilizumab in active rheumatoid arthritis (RA) patients. METHODS: Fourteen patients with active RA were enrolled in this study. The patients received tocilizumab 8 mg/kg intravenously every four weeks for 6 months. Disease activity, anemia-related factors including serum hepcidin-25, and hematological parameters were monitored at baseline and at 1, 3, and 6 months after the initiation of treatment. RESULTS: Significant reductions in tender joint count, swollen joint count, visual analogue scale, erythrocyte sedimentation rate (ESR), and C-reactive (CRP) protein plus reductions in a 28-joint disease activity score were observed within one month after the first tocilizumab treatment. These effects lasted throughout the six-month study period. In addition, significant improvements in anemia-related factors such as hepcidin-25, ferritin, iron, hemoglobin, red blood cell counts and mean corpuscular volume were observed during the treatment period. Hematological parameters were improved with reductions in counts for leukocytes, monocytes, neutrophils, and platelets. The lymphocyte counts and their subset numbers were unchanged. Changes in hepcidin levels showed significant correlation with changes in CRP, ESR, ferritin, hemoglobin and counts for red blood cells, leukocytes, and neutrophils during the treatment period. CONCLUSION: This study demonstrates that tocilizumab significantly and meaningfully reduces disease burden in patients with active RA. In addition, tocilizumab diminishes the levels of inflammatory anemia by inhibiting hepcidin production. These clinical data provide evidence of a favorable outcome from tocilizumab in RA.
		                        		
		                        		
		                        		
		                        			Anemia*
		                        			;
		                        		
		                        			Arthritis, Rheumatoid*
		                        			;
		                        		
		                        			Blood Sedimentation
		                        			;
		                        		
		                        			Erythrocyte Count
		                        			;
		                        		
		                        			Erythrocyte Indices
		                        			;
		                        		
		                        			Erythrocytes
		                        			;
		                        		
		                        			Ferritins
		                        			;
		                        		
		                        			Hepcidins*
		                        			;
		                        		
		                        			Humans
		                        			;
		                        		
		                        			Iron
		                        			;
		                        		
		                        			Joints
		                        			;
		                        		
		                        			Leukocytes
		                        			;
		                        		
		                        			Lymphocyte Count
		                        			;
		                        		
		                        			Monocytes
		                        			;
		                        		
		                        			Neutrophils
		                        			
		                        		
		                        	
6.Effect of stellate ganglion block on laryngopharyngeal reflux disease.
Ji Won CHUNG ; Hye Jung CHUN ; Mi Soon LEE ; Ki Ryang AHN ; Chun Sook KIM ; Kyu Sik KANG ; Sie Hyeon YOO ; Jin Hun CHUNG ; Nan Seol KIM ; Yong Han SEO ; Hyung Youn GONG ; Yong Man LEE
Korean Journal of Anesthesiology 2013;64(5):439-442
		                        		
		                        			
		                        			BACKGROUND: Laryngopharyngeal reflux (LPR) disease has many symptoms such as globus pharyngeus, excessive throat clearing and hoarseness. The aim of this study was to investigate the effect of stellate ganglion block (SGB) in addition to proton pump inhibitors (PPI) on LPR. METHODS: Fifty patients complaining of more than 3 typical LPR symptoms for over 3 months were enrolled in the study. The P group took PPI for 8 weeks. The SP group took PPI and interwent a series of 8 SGB procedure once a week during the period of treatment. The blocks were performed one at a time unilaterally on the right and left stellate ganglions by injecting 1% mepivacaine 6 ml. We evaluated the reflux symptom index (RSI) before treatment and following 4 weeks and 8 weeks of treatment in both groups. RESULTS: After 4 weeks of treatment, the RSI of the P group decreased, but not significantly, to 16.6 +/- 6.8 compared with the baseline value of 19.2 +/- 2.7 (P = 0.093), whereas the RSI of the SP group decreased significantly to 9.8 +/- 3.3 compared with the baseline value of 19.0 +/- 4.7 (P = 0.000). After 8 weeks of treatment, the RSI of the P group decreased significantly to 13.7 +/- 6.7 (P = 0.001) and the RSI of the SP group also decreased significantly to 7.7 +/- 3.4 (P = 0.000). There were significant differences in the RSI between the two groups after 4 weeks (P = 0.000) and 8 weeks (P = 0.001) of treatment. CONCLUSIONS: The symptoms of LPR improved earlier when PPI therapy was combined with SGB compared with PPI therapy alone.
		                        		
		                        		
		                        		
		                        			Hoarseness
		                        			;
		                        		
		                        			Humans
		                        			;
		                        		
		                        			Laryngopharyngeal Reflux
		                        			;
		                        		
		                        			Mepivacaine
		                        			;
		                        		
		                        			Pharynx
		                        			;
		                        		
		                        			Proton Pump Inhibitors
		                        			;
		                        		
		                        			Stellate Ganglion
		                        			
		                        		
		                        	
7.Expression of DNA Repairing Enzymes in the Cerebral Tissue of the Rat Fetus After Hypoxic Injury.
Kyung Jin LEE ; Jung Woo KIM ; Byung Woon MIN ; Nan Young BAE ; Ki Young KANG
Korean Journal of Physical Anthropology 2012;25(2):67-76
		                        		
		                        			
		                        			Hypoxia is one of the major causes of neonatal mortality. Hypoxia-induced tissue injuries are resulted from complex mechanisms such as DNA damage and apoptosis. In this study, we aimed to elucidate the changes in the expression of DNA repairing enzymes such as 8-hydroxyguanine glycosylase 1 (OGG1) and apurinic/apyrimidinic endonuclease 1 (APE1) and brain derived neurotrophic factor (BDNF) in the fetal cerebral tissue after intrauterine hypoxic injury. For this study, pregnant Sprague-Dawley rats were exposed to hypoxic gas (10% O2, 5% CO2, 85% N2) for 2 or 4 hours at postconception day 14.5 and 15.5. After 24 hours, the animals were anesthetized with ethyl ether and fetuses were obtained by laparatomy. Hematoxylin-eosin stain, immunohistochemical stain, and western blot were employed for analysis. The caspase-3 immunolabeled cells were significantly increased within the cerebral cortex after hypoxic injury. The expressions of OGG1, APE1, and BDNF were also increased in the cerebral tissue after hypoxic injury at post-conception day 14.5, in a dose-dependent manner. However, the expression of BDNF was significantly decreased in the cortical tissue exposed to hypoxic injury at postconception day 15.5. These results demonstrate that fetal hypoxic injury induces apoptosis of the nerve cells and promotes the expressions of the DNA repairing enzymes and neurotrophic factors. In addition, these results suggest that protection mechanisms against hypoxic injury alter along the progression of the fetal development.
		                        		
		                        		
		                        		
		                        			Animals
		                        			;
		                        		
		                        			Anoxia
		                        			;
		                        		
		                        			Apoptosis
		                        			;
		                        		
		                        			Blotting, Western
		                        			;
		                        		
		                        			Brain-Derived Neurotrophic Factor
		                        			;
		                        		
		                        			Caspase 3
		                        			;
		                        		
		                        			Cerebral Cortex
		                        			;
		                        		
		                        			DNA
		                        			;
		                        		
		                        			DNA Damage
		                        			;
		                        		
		                        			DNA Repair
		                        			;
		                        		
		                        			Ether, Ethyl
		                        			;
		                        		
		                        			Fetal Development
		                        			;
		                        		
		                        			Fetus
		                        			;
		                        		
		                        			Guanine
		                        			;
		                        		
		                        			Humans
		                        			;
		                        		
		                        			Infant
		                        			;
		                        		
		                        			Infant Mortality
		                        			;
		                        		
		                        			Nerve Growth Factors
		                        			;
		                        		
		                        			Neurons
		                        			;
		                        		
		                        			Rats
		                        			;
		                        		
		                        			Rats, Sprague-Dawley
		                        			
		                        		
		                        	
8.Lower leg compartment syndrome following prolonged orthopedic surgery in the lithotomy position: A case report.
Jin Hun CHUNG ; Ki Ryang AHN ; Jin Hyung PARK ; Chun Sook KIM ; Kyu Sik KANG ; Sie Hyeon YOO ; Ji Won CHUNG ; Nan Seol KIM ; Seung Jin LEE
Korean Journal of Anesthesiology 2010;59(Suppl):S49-S52
		                        		
		                        			
		                        			Surgical procedures necessitating the prolonged use of the lithotomy position can be associated with neuromuscular dysfunction. Compartment syndrome of the lower leg is a grave complication which, if unrecognized, can lead to either permanent neuromuscular dysfunction or limb loss. We report a case of compartment syndrome of lower leg that occurred in male patient aged 20 years after 380 minutes arthroscopic surgery in the lithotomy position.
		                        		
		                        		
		                        		
		                        			Aged
		                        			;
		                        		
		                        			Arthroscopy
		                        			;
		                        		
		                        			Compartment Syndromes
		                        			;
		                        		
		                        			Extremities
		                        			;
		                        		
		                        			Humans
		                        			;
		                        		
		                        			Leg
		                        			;
		                        		
		                        			Male
		                        			;
		                        		
		                        			Orthopedics
		                        			
		                        		
		                        	
9.Henoch-Schonlein Nephritis in Adults: Renal Outcomes and Prognostic Factors.
Nan Hee KIM ; Young Rok HAM ; Ji Hyun YOON ; Ji Yoon JUNG ; Eui Sik KIM ; Sarah CHUNG ; Dae Eun CHOI ; Ki Ryang NA ; Kang Wook LEE ; Young Tai SHIN
Korean Journal of Nephrology 2009;28(6):570-578
		                        		
		                        			
		                        			PURPOSE: Renal involvement of Henoch-Schonlein (HS) purpura is common, and the long-term prognosis depends on the degree of renal injury. The aim of our study was to search for prognostic factors of HS nephritis and its relationship with clinical, laboratory, and renal pathologic features. METHODS: Study population consisted of 81 patients (age > or =15 years) with HS nephritis who had been admitted to Chungnam National University Hospital from January, 1991 to February, 2008. We reviewed the clinical symptoms, laboratory data and pathologic findings of kidney of total 81 patients, and also analyzed the relationship between these and renal prognosis. RESULTS: The mean age of patients was 40.6 years and the median duration of follow-up was 16 months. Male to female ratio was 1.08. Kidney biopsies were carried out in 61 patients (75.4%). Regarding renal function, 14 (17.3%) of patients reached moderate to severe renal insufficiency, and 4 (4.9%) progressed to end-stage renal disease within 16 months (median, range 1.5-196 months) after diagnosis. Complete clinical remission was achieved in 26 patients (32.1%). The presence of gastrointestinal symptoms, relapse of purpura, hypertension, nephrotic syndrome, renal insufficiency, increased level of serum immunoglobulin A, and the magnitude of crescents and sclerotic glomeruli were significantly associated with poor renal prognosis (all p<0.05). In multivariate logistic regression analysis, initial elevated serum creatinine level and hypertension were independent prognostic factors (p=0.013, p=0.007). CONCLUSION: We concluded that the initial clinical findings including renal function and hypertension are important prognostic factors in adult HS nephritis.
		                        		
		                        		
		                        		
		                        			Adult
		                        			;
		                        		
		                        			Biopsy
		                        			;
		                        		
		                        			Creatinine
		                        			;
		                        		
		                        			Female
		                        			;
		                        		
		                        			Follow-Up Studies
		                        			;
		                        		
		                        			Humans
		                        			;
		                        		
		                        			Hypertension
		                        			;
		                        		
		                        			Immunoglobulin A
		                        			;
		                        		
		                        			Kidney
		                        			;
		                        		
		                        			Kidney Failure, Chronic
		                        			;
		                        		
		                        			Logistic Models
		                        			;
		                        		
		                        			Male
		                        			;
		                        		
		                        			Nephritis
		                        			;
		                        		
		                        			Nephrotic Syndrome
		                        			;
		                        		
		                        			Prognosis
		                        			;
		                        		
		                        			Purpura
		                        			;
		                        		
		                        			Purpura, Schoenlein-Henoch
		                        			;
		                        		
		                        			Recurrence
		                        			;
		                        		
		                        			Renal Insufficiency
		                        			
		                        		
		                        	
10.Renal Cell Carcinoma Occurred in Native Kidneys before and after Renal Transplantation.
Nan Hee KIM ; Ji Won PARK ; Jae Hee HWANG ; Sarah CHUNG ; Dae Eun CHOI ; Ki Ryang NA ; Kang Wook LEE ; Young Tai SHIN
Korean Journal of Nephrology 2008;27(5):616-621
		                        		
		                        			
		                        			One of the major risk factors of renal cell carcinoma is acquired cystic kidney disease (ACKD) developed in course of end-stage renal failure (ESRF) and the incidence of ACKD increases with the duration of dialysis. Moreover, the overall incidence of renal cell carcinoma after renal transplantation has been reported to be being more than 8 times higher compared with that of general population. But renal cell carcinomas occurred in native kidneys before and after renal transplantation in ESRF patient with ACKD are very rare. We experienced a case of renal cell carcinoma occurred in native kidneys 14 months before and 5 months after renal transplantation in an ESRF patient with ACKD.
		                        		
		                        		
		                        		
		                        			Carcinoma, Renal Cell
		                        			;
		                        		
		                        			Dialysis
		                        			;
		                        		
		                        			Humans
		                        			;
		                        		
		                        			Incidence
		                        			;
		                        		
		                        			Kidney
		                        			;
		                        		
		                        			Kidney Diseases, Cystic
		                        			;
		                        		
		                        			Kidney Failure, Chronic
		                        			;
		                        		
		                        			Kidney Transplantation
		                        			;
		                        		
		                        			Risk Factors
		                        			
		                        		
		                        	
            
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