26
|
Yoon YA, Song JS, Lee SY, Yoon CE, Kang ES. The novel allele HLA-C*03:04:36 identified by sequence-based typing. ACTA ACUST UNITED AC 2013; 82:353-4. [PMID: 24102105 DOI: 10.1111/tan.12197] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2013] [Accepted: 08/12/2013] [Indexed: 11/28/2022]
Abstract
The new allele, HLA-C*03:04:36, differs from C*03:04:01:01 by one nucleotide substitution at codon 207 (GGC→GGT).
Collapse
|
27
|
Lee YK, Jun HJ, Nahm JH, Lim TS, Park JS, Ahn JB, Rha SY, Chung HC, Oh HE, Song JS, Yang WI, Kim HS. Therapeutic strategies for well-differentiated papillary mesothelioma of the peritoneum. Jpn J Clin Oncol 2013; 43:996-1003. [PMID: 23964112 DOI: 10.1093/jjco/hyt117] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
OBJECTIVE Well-differentiated papillary mesothelioma is an uncommon subtype of mesothelioma with a frequently indolent course, although it occasionally manifests in a more aggressive form. To establish a treatment strategy for this rare disease, we report the clinical characteristics and outcomes of 15 patients with well-differentiated papillary mesothelioma. METHODS All pathologically diagnosed well-differentiated papillary mesothelioma cases were reviewed between 1998 and 2012. RESULTS Of the 15 cases, 8 and 7 presented with single and multiple lesions, respectively. All cases with single lesions were asymptomatic, while 4 out of the 7 cases with multiple lesions were symptomatic. After tumor excision, none of the eight single-lesion cases experienced tumor recurrence. Among the other seven cases with multiple lesions, only one patient with disseminated lesions died due to disease burden. Five patients with multiple lesions received cisplatin-based intravenous or intraperitoneal chemotherapy, with a mix of complete (n= 2) and partial (n= 2) responses observed. Of particular note, one patient receiving cisplatin and pemetrexed combination chemotherapy experienced complete tumor resolution without any serious toxicity. CONCLUSIONS We recommend different treatment strategies based on the disease status. If the tumor is completely resectable, an excisional biopsy seems to be sufficient. If complete resection is unavailable for the asymptomatic patient with a localized tumor extent, close follow-up is an appropriate option. When the tumor is extensive or accompanied by symptoms, chemotherapy should be strongly considered.
Collapse
|
28
|
Oh BR, Song JS, Choi EH, Noh HK, Choe PG. P226: An engaged intervention to decrease central line-asssociated infections in the ICU. Antimicrob Resist Infect Control 2013. [PMCID: PMC3687756 DOI: 10.1186/2047-2994-2-s1-p226] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
|
29
|
Shim DB, Song JS, Baek SJ. An ectopic hamartomatous thymoma. Auris Nasus Larynx 2012; 39:110-3. [DOI: 10.1016/j.anl.2011.07.016] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2011] [Revised: 07/28/2011] [Accepted: 07/29/2011] [Indexed: 11/16/2022]
|
30
|
Kim SK, Park CK, Lee SY, Song JS, Park SH, Kim YK. Effects of Rosiglitazone on the Expression of PPAR-γ and on the Production of IL-6 and IL-8 in Acute Lung Injury Model Using Human Pulmonary Epithelial Cells. TROP J PHARM RES 2011. [DOI: 10.4314/tjpr.v10i6.5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
|
31
|
Kim SK, Park CK, Lee SY, Song JS, Park SH, Kim YK. Effects of Rosiglitazone on the Expression of PPAR-γ and the Production of IL-6 and IL-8 in Acute Lung Injury Model Using Human Pulmonary Epithelial Cells. TROP J PHARM RES 2011. [DOI: 10.4314/tjpr.v10i5.4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
|
32
|
Song JS, Jung SH, Yi SY, Oh HE, Cho MY, Park KH. Telomerase Activity in Urethane-Induced Mouse Lung Tumorigenesis. KOREAN JOURNAL OF PATHOLOGY 2011. [DOI: 10.4132/koreanjpathol.2011.45.3.261] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
|
33
|
Cho HK, Song JS, Kang WH, Ro BI. Pigmented trichoblastoma arising from the nevus sebaceous: a rare case in Korea. Ann Dermatol 2009; 21:406-8. [PMID: 20523834 DOI: 10.5021/ad.2009.21.4.406] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2008] [Revised: 04/08/2009] [Accepted: 05/11/2009] [Indexed: 11/08/2022] Open
Abstract
Trichoblastoma is occasionally observed in association with a pre-existing nevus sebaceous in the Korean literature. However, there has been no report on the pigmented type. Herein, we report the first Korean case of a pigmented trichoblastoma arising from the nevus sebaceous on the forehead. A 28-year-old male presented with a dark nodular lesion within a yellowish plaque on the forehead. The surrounding yellowish plaque on the forehead had existed since birth. The central, dark-pigmented nodule began to appear three years ago and enlarged gradually. Histopathologic findings of central pigmented lesion showed heavy melanin deposits within and around the tumor nests. Complete excision was made as treatment.
Collapse
|
34
|
Kim SJ, Kim JS, Kim SC, Kim YK, Kim YK, Kang JY, Yoon HK, Song JS, Lee SH, Moon HS, Kim JW, Kim KH, Kim CH, Shim BY, Kim HK. A multicenter phase II study of belotecan, new camptothecin analogue, in patients with previously untreated extensive stage disease small cell lung cancer. Lung Cancer 2009; 68:446-9. [PMID: 19683359 DOI: 10.1016/j.lungcan.2009.07.002] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2009] [Revised: 06/26/2009] [Accepted: 07/04/2009] [Indexed: 10/20/2022]
Abstract
Belotecan (Camtobell, CKD602) is a new camptothecin derivative antitumor agent that belongs to the topoisomerase inhibitors. The aim of this phase II study was to evaluate the efficacy and safety of single agent belotecan in patients with small cell lung cancer (SCLC). Patients with previously untreated extensive stage disease (ED) SCLC were entered into the study. Belotecan was given by daily intravenous infusion at 0.5mg/m(2)/day for 5 consecutive days, every 3 weeks. 62 patients were enrolled in this study. The overall response rate to chemotherapy on an intention-to-treat basis was 53.2%. The median overall survival was 10.4 months, the median time to progression 4.6 months, and the 1-year survival rate 49.9%. The most common toxicity was hematologic. Grade 3/4 neutropenia occurred in 71.0% of patients and grade 3/4 thrombocytopenia 12.9%. Non-hematologic toxicity of grade 3 or 4 was low. The results suggest that belotecan is relatively active and well tolerable as single agent in patients with ED SCLC. Further investigations with platinum or other active agents are needed.
Collapse
|
35
|
Song JS, Jang SJ, Lee JJ, Lee JH, Bae IK, Jeong BC, Cha SS, Lee JH, Hong SK, Lee SH. Association of the bla(CMY-10) gene with a novel complex class 1 integron carrying an ISCR1 element in clinical isolates from Korea. Clin Microbiol Infect 2009; 16:1013-7. [PMID: 19681956 DOI: 10.1111/j.1469-0691.2009.03002.x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
The bla(CMY-10) gene responsible for β-lactam resistance was located on a new complex class 1 integron within a conjugative plasmid. The sul1-type class 1 integron, containing an aadA2a gene cassette, was identified upstream of bla(CMY-10). A unique gene array (yqgF-yqgE-gshB-orf97--orf105) was identified downstream of bla(CMY-10.).
Collapse
|
36
|
Lee JW, Cha DK, Oh YK, Ko KB, Song JS. Zero-valent iron pretreatment for detoxifying iodine in liquid crystal display (LCD) manufacturing wastewater. JOURNAL OF HAZARDOUS MATERIALS 2009; 164:67-72. [PMID: 18799266 DOI: 10.1016/j.jhazmat.2008.07.147] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/22/2008] [Revised: 07/28/2008] [Accepted: 07/28/2008] [Indexed: 05/26/2023]
Abstract
This study investigated reductive transformation of iodine by zero-valent iron (ZVI), and the subsequent detoxification of iodine-laden wastewater. ZVI completely reduced aqueous iodine to non-toxic iodide. Respirometric bioassay illustrated that the presence of iodine increase the lag phase before the onset of oxygen consumption. The length of lag phase was proportional to increasing iodine dosage. The reduction products of iodine by ZVI did not exhibit any inhibitory effect on the biodegradation. The cumulative biological oxidation associated with iodine toxicity was closely fitted to Gompertz model. When iodine-laden wastewater was continuously fed to a bench-scale activated sludge unit, chemical oxygen demand (COD) removal efficiencies decreased from above 90% to below 80% along with a marked decrease in biomass concentration. On the other hand, the COD removal efficiency and biomass concentration remained constant in the integrated ZVI-activated sludge system. Respirometric bioassay with real iodine-laden LCD manufacturing wastewater demonstrated that ZVI was effective for detoxifying iodine and consequently enhancing biodegradability of wastewater. This result suggested that ZVI pretreatment may be a feasible option for the removal of iodine in LCD processing wastewater, instead of more costly processes such as adsorption and chemical oxidation, which are commonly in the iodine-laden LCD wastewater treatment facility.
Collapse
|
37
|
Cho HK, Eun LY, Song JS, Kang WH, Ro BI. A Case of Vitiligo after Kawasaki's Disease. Ann Dermatol 2009; 21:75-7. [PMID: 20548863 PMCID: PMC2883377 DOI: 10.5021/ad.2009.21.1.75] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2008] [Accepted: 08/28/2008] [Indexed: 11/08/2022] Open
Abstract
Vitiligo is a common skin disease, but its pathogenesis has not been fully determined, though an autoimmune etiology is considered likely. Kawasaki disease (KD) is an acute multisystem vasculitis of childhood associated with coronary arteriopathy, and is diagnosed based on clinical criteria. Furthermore, vitiligo has been associated with several other diseases, but no report has been issued about the relationship between vitiligo and Kawasaki's disease. The author's report the case of an 8-year-old male child that presented with depigmented lesions, which developed from the desquamative skin lesions of Kawasaki's disease.
Collapse
|
38
|
Rhee CK, Kang CM, You MB, Yoon HK, Kim YK, Kim KH, Moon HS, Park SH, Song JS. Effect of fudosteine on mucin production. Eur Respir J 2008; 32:1195-202. [PMID: 18579549 DOI: 10.1183/09031936.00018508] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Fudosteine is a novel mucoactive agent, although little is known about how fudosteine decreases mucin production. The present study examined the effects of fudosteine on MUC5AC mucin synthesis and cellular signalling. An animal model of lipopolysaccharide (LPS)-induced inflammation and a bronchial epithelial cell line model of tumour necrosis factor (TNF)-alpha-induced inflammation were used. Fudosteine was administered before stimulation with LPS or TNF-alpha. The MUC5AC mucin levels were assayed and the expression of the MUC5AC gene was measured. Western blotting was carried out for the detection of phosphorylated epidermal growth factor receptor (p-EGFR), phosphorylated p38 mitogen-activated protein kinase (p-p38 MAPK) and phosphorylated extracellular signal-related kinase (p-ERK). MUC5AC mucin synthesis and the expression of the MUC5AC gene were increased by LPS in rats or TNF-alpha in NCI-H292 cells; these effects were inhibited by fudosteine treatment. After stimulation with LPS or TNF-alpha, the expression of p-EGFR, p-p38 MAPK and p-ERK were detected. Fudosteine treatment reduced the expression levels of p-p38 MAPK and p-ERK in vivo and of p-ERK in vitro. The present results suggest fudosteine inhibits MUC5AC mucin hypersecretion by reducing MUC5AC gene expression and the effects of fudosteine are associated with the inhibition of extracellular signal-related kinase and p38 mitogen-activated protein kinase in vivo and extracellular signal-related kinase in vitro.
Collapse
|
39
|
Song JS, Huh KH, Park J, Ju MK, Kim MS, Kim YS. Effects of inosine monophosphate dehydrogenase inhibition on high glucose-induced cellular reactive oxygen species in mesangial cells. Transplant Proc 2008; 40:464-6. [PMID: 18374103 DOI: 10.1016/j.transproceed.2008.01.016] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Abstract
Mesangial cell extracellular matrix (ECM) synthesis plays an important role in chronic renal diseases including chronic renal allograft dysfunction and diabetic nephropathy. Although inosine monophosphate dehydrogenase 2 (IMPDH2), as a target of mycophenolic acid (MPA), is important for de novo guanosine synthesis in lymphocytes, mesenchymal cells are not wholly dependent on it. To explore the importance of IMPDH2 on the inhibitory effects of MPA in mesangial cells (MC), we compared the effects of MPA and IMPDH2 siRNA on high glucose (HG)-induced fibronectin secretion and cellular reactive oxygen species (ROS). Mouse mesangial cells (MMC) were stimulated with HG (30 mmol/L D-glucose) in the presence or absence of MPA pretreatment or IMPDH2 siRNA transfection. Fibronectin secretion was measured by Western blot analysis, and dichlorofluorescein (DCF)-sensitive cellular ROS assessed by flow cytometry. HG increased fibronectin secretion by 1.8-fold at 24 hours and DCF-sensitive cellular ROS by 1.5-fold at 1 hour. MPA at 10 micromol/L totally inhibited HG-induced fibronectin secretion and cellular ROS in MMC. However, IMPDH2 siRNA only partially suppressed HG-induced fibronectin secretion and cellular ROS. These results suggested that MPA may inhibit HG-induced fibronectin secretion partially through inhibiting cellular ROS and the inhibition of IMPDH2 may be partially involved in the mechanism of MPA.
Collapse
|
40
|
Cha EY, Kim KW, Choi YJ, Song JS, Cho KJ, Lee MG. Multicystic cavernous haemangioma of the liver: ultrasonography, CT, MR appearances and pathological correlation. Br J Radiol 2008; 81:e37-9. [PMID: 18238911 DOI: 10.1259/bjr/36041107] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023] Open
Abstract
Among the hepatic haemangiomas with atypical features when studied radiologically, the multicystic type is extremely rare. We report a case of multicystic hepatic haemangioma in a 62-year-old woman, which was found incidentally during ultrasound screening. Because the tumour showed atypical features on ultrasonography, CT and MRI, the correct diagnosis was not made until the surgery. In this report, the atypical radiological findings are illustrated and correlated with pathological findings.
Collapse
|
41
|
Park NH, Park CS, Lee EJ, Kim MS, Ryu JA, Bae JM, Song JS. Ultrasonographic findings identifying the faecal-impacted appendix: differential findings with acute appendicitis. Br J Radiol 2007; 80:872-7. [PMID: 17875592 DOI: 10.1259/bjr/80553348] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Abstract
The aim of this study was to identify ultrasonographic findings that show the normal faecal-impacted appendix, in order to avoid unnecessary surgery via a misdiagnosis of acute appendicitis. Of 160 patients who underwent ultrasonography between January 2004 and July 2005 for right lower quadrant pain, 22 cases (including 7 cases confirmed pathologically and 15 confirmed clinically and on follow-up ultrasonography) were diagnosed as a normal faecal-impacted appendix. The criteria that we used to distinguish a faecal-impacted appendix from acute appendicitis include preservation of the normal wall layering of the appendix, maximum mural thickness, presence of peri-appendiceal fat infiltration and increased blood flow in the appendiceal wall. The maximum measured outer diameter of a normal faecal-impacted appendix was 0.54-1.03 cm, with a mean diameter of 0.68 cm. The maximum mural thickness ranged from 0.08 cm to 0.26 cm, with a mean thickness of 0.15 cm. The normal wall layers of the appendix were preserved and no evidence was seen of peri-appendiceal fat infiltration in any case. No demonstrably increased blood flow in the appendiceal wall was observed. In conclusion, faecal impaction increases the outer transverse diameter of the normal appendix, frequently leading to a misdiagnosis of acute appendicitis. Recognition of preservation of the normal layering of the appendiceal wall, smaller maximal outer diameter, thinner maximal mural thickness, the absence of peri-appendiceal mesenteric infiltration and no demonstrably increased blood flow in the appendiceal wall should help to prevent unnecessary surgery.
Collapse
|
42
|
Jung SH, Chong Y, Kim HR, Chung YK, Koh SB, Yong SJ, Park TI, Chung MJ, Kim YM, Song JS. P1-133: Epidemiologic and Clinicopathologic Characteristics of Malignant Mesothelioma through Surveillance System in Korea. J Thorac Oncol 2007. [DOI: 10.1097/01.jto.0000283747.85598.3d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
|
43
|
Koo DH, Chang HM, Jung JY, Song JH, Lee JL, Ryu MH, Kim TW, Yook JH, Song JS, Lee JS, Kang YK. Cutaneous metastasis resembling acute dermatitis in patient with advanced gastric cancer. Clin Exp Dermatol 2007; 32:284-6. [PMID: 17263831 DOI: 10.1111/j.1365-2230.2007.02361.x] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The most common metastatic sites from gastric cancer are the liver, intra-abdominal lymph nodes, ovary and peritoneal cavity. Cutaneous metastasis of gastric cancer is rare, and most cutaneous metastases are typically solitary, nodular, have a firm consistency, and are red or hyperpigmented. Thus, cutaneous metastasis is easily distinguished from other skin disease. We report a case of a 60-year-old woman with cutaneous metastasis of gastric cancer, whose facial skin showed painless pruritic eczema, resembling acute dermatitis. She had earlier undergone a total gastrectomy for advanced gastric cancer in our hospital. After 14 months, she developed eczematous facial lesions; the presumptive diagnosis was acute dermatitis. However, skin biopsy unexpectedly revealed cutaneous metastasis of gastric cancer. After 6 months of systemic chemotherapy with capecitabine and cisplatin, the cutaneous metastasis was markedly improved and a clinically complete remission was accomplished.
Collapse
|
44
|
Noh H, Kim JS, Han KH, Lee GT, Song JS, Chung SH, Jeon JS, Ha H, Lee HB. Oxidative stress during peritoneal dialysis: implications in functional and structural changes in the membrane. Kidney Int 2006; 69:2022-8. [PMID: 16641917 DOI: 10.1038/sj.ki.5001506] [Citation(s) in RCA: 74] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Progressive peritoneal fibrosis, membrane hyperpermeability, and ultrafiltration failure have been observed in patients on long-term peritoneal dialysis (PD). The present study tested the hypothesis that reactive oxygen species (ROS) generated by conventional PD solution (PDS) mediate functional and structural alterations of peritoneal membrane in vivo. Sprague-Dawley rats were randomized to control, PDS, PDS with an antioxidant, and PDS with an angiotensin II (Ang II) receptor blocker. Commercial PDS containing 3.86% glucose (20-30 ml) with or without N-acetylcystein (NAC) 10 mM or losartan 5 mg/kg was administered intraperitoneally twice a day for 12 weeks. Control rats received sham injection. Rats treated with PDS had significantly lower drain volume and D(4)/D(0) glucose, but higher D(4)/P(4) creatinine and increased membrane thickness and endothelial NOS (eNOS) expression compared to control rats. Omental transforming growth factor (TGF)-beta1, vascular endothelial growth factor (VEGF), collagen I, and heat-shock protein (hsp) 47 expression and lipid peroxide levels and dialysate VEGF and Ang II concentrations were significantly increased in rats treated with PDS compared to control. All of these changes were prevented by both NAC and losartan. In conclusion, the present study demonstrates that ROS generated by conventional PDS are, in large part, responsible for peritoneal fibrosis and membrane hyperpermeability. We suggest that antioxidants or Ang II receptor blockers may allow better preservation of the structural and functional integrity of the peritoneal membrane during long-term PD.
Collapse
|
45
|
Park DI, Kim YH, Kim HS, Kim WH, Kim TI, Kim HJ, Yang SK, Byeon JS, Lee MS, Jung IK, Chung MK, Jung SA, Jeen YT, Choi JH, Choi H, Han DS, Song JS. Diagnostic yield of advanced colorectal neoplasia at colonoscopy, according to indications: an investigation from the Korean Association for the Study of Intestinal Diseases (KASID). Endoscopy 2006; 38:449-55. [PMID: 16767578 DOI: 10.1055/s-2006-925227] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
BACKGROUND AND STUDY AIMS The factors that more accurately predict the detection of colorectal cancers and adenomas at colonoscopy are different. We conducted a prospective multicenter study to evaluate which indications were most closely associated with advanced colorectal neoplasm (CRN), including colorectal cancer, in a group of patients undergoing colonoscopy. PATIENTS AND METHODS The 17 468 patients were enrolled in this study between July 2003 and March 2004, from 11 tertiary medical centers in Korea. They were recruited according to 11 itemized colonoscopic indications. The term "advanced adenoma" refers here to tubular adenomas of diameter of 11 mm or more, or to tubulovillous, villous, or severely dysplastic adenomas, irrespective of their size. Cancer was defined as the invasion of malignant cells beyond the muscularis mucosa. Advanced CRN was defined as advanced adenoma or invasive cancer. RESULTS Advanced CRN was found in 1227/17 307 patients (1176 advanced adenomas plus 51 carcinomas, 7.1 %). According to univariate and multivariate analysis, the factors associated with advanced CRN included age >60 years (odds ratio (OR) 2.1, 95 % confidence interval (CI) 1.8 - 2.4, P < 0.0001), male gender (OR 2.1, 95 %CI 1.7 - 2.7, P < 0.0001), referral for colonoscopy from primary care physician (OR 3.1, 95 %CI 2.5 - 3.7, P < 0.0001), and several other indications (OR 1.8, 95 %CI 1.5 - 2.3, P < 0.001). The yield of colonoscopy for advanced CRN was lower (2.2 %) than expected in patients with iron-deficiency anemia (OR 0.5, 95 %CI 0.2 - 0.9, P = 0.03). CONCLUSIONS Age, gender, and referral for colonoscopy from primary care physician constituted important independent predictors of advanced CRN in patients undergoing colonoscopy.
Collapse
|
46
|
Kwak HJ, Song JS, No ZS, Song JH, Yang SD, Cheon HG. The inhibitory effects of roflumilast on lipopolysaccharide-induced nitric oxide production in RAW264.7 cells are mediated by heme oxygenase-1 and its product carbon monoxide. Inflamm Res 2006; 54:508-13. [PMID: 16389572 DOI: 10.1007/s00011-005-1386-1] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022] Open
Abstract
OBJECTIVES Heme oxygenase-1 (HO-1) is an enzyme that degrades heme into biliverdin, free iron, and carbon monoxide (CO). This enzyme is known to have cytoprotective and anti-inflammatory effects. In this study, we investigated whether roflumilast, a newly developed specific phosphodiesterase 4 (PDE4) inhibitor, mediates some of its anti-inflammatory effects by blocking nitric oxide (NO) and tumor necrosis factor alpha (TNF-alpha) via the induction of HO-1 expression in macrophages. METHODS The expression of iNOS and HO-1 was analyzed by western blot analysis. The production of NO and TNF-alpha was assayed by Greiss and ELISA, respectively. RESULTS Roflumilast markedly suppressed LPS-induced NO and TNF-alpha production and these phenomena were correlated with the induction of HO-1 protein levels. Moreover, the inhibitory effects of roflumilast on NO production were abrogated by a HO-1 inhibitor and a CO scavenger. Tricarbonyldichlrororuthenium(II) dimer, a CO releasing molecule significantly suppressed NO production. CONCLUSIONS These results suggested that roflumilast exerts its anti-inflammatory effects in macrophages through a novel mechanism that involves the action of HO-1 and its product, CO.
Collapse
|
47
|
Jeong SH, Bae IK, Kwon SB, Lee JH, Song JS, Jung HI, Sung KH, Jang SJ, Lee SH. Dissemination of transferable CTX-M-type extended-spectrum beta-lactamase-producing Escherichia coli in Korea. J Appl Microbiol 2005; 98:921-7. [PMID: 15752339 DOI: 10.1111/j.1365-2672.2004.02526.x] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
AIMS Among 365 Escherichia coli isolated in 2003, 31 cefotaxime-resistant isolates were obtained from clinical specimens taken from adults hospitalized in Busan, Korea. Six extended-spectrum beta-lactamase (ESBL)-producing isolates were investigated further to determine the mechanism of resistance. METHODS AND RESULTS These isolates were analysed by antibiotic susceptibility testing, pI determination, plasmid profiles, transconjugation test, PCR-restriction fragment length polymorphism (RFLP), enterobacterial repetitive consensus (ERIC)-PCR and DNA sequencing. All six of these isolates were found to contain the CTX-M-type ESBL genes. Five clinical isolates and their transconjugants produced CTX-M-3. One clinical isolate (K17391) and its transconjugant (trcK17391) produced CTX-M-15. Five clinical isolates also produced another TEM-1. One clinical isolate (K12776) also contained another TEM-52. CTX-M-3 ESBL gene was responsible for the resistance to piperacillin, cephalothin, cefotaxime, cefepime and aztreonam. CTX-M-15 or TEM-52 was especially responsible for the resistance to ceftazidime. CONCLUSIONS These results appear to represent the in vivo evolution of CTX-M-type beta-lactamase genes (bla(CTX-M-3) --> bla(CTX-M-15)) under the selective pressure of antimicrobial therapy (especially ceftazidime). PCR-RFLP is a reliable method to discriminate CTX-M-15 gene from CTX-M-3 gene. ERIC-PCR analysis revealed that dissemination of CTX-M-3 was not due to a clonal outbreak of a resistant strain but to the intra-species spread of resistance to piperacillin, cephalothin, cefotaxime, cefepime and aztreonam in Korea. SIGNIFICANCE AND IMPACT OF THE STUDY This is the first report of the occurrence of CTX-M-1 cluster ESBLs in Korea. A more comprehensive survey of these ESBL types from Korea is urgently needed because of the in vivo evolution of CTX-M-15 from CTX-M-3. The emergence of these CTX-M-type ESBLs suggests that diagnostic laboratories should screen for ESBLs with ceftazidime as well as cefotaxime; they should still perform clavulanate synergy tests on resistant isolates.
Collapse
|
48
|
Yoon HK, Moon HS, Park SH, Song JS, Lim Y, Kohyama N. Dendriform pulmonary ossification in patient with rare earth pneumoconiosis. Thorax 2005; 60:701-3. [PMID: 16061714 PMCID: PMC1747481 DOI: 10.1136/thx.2003.006270] [Citation(s) in RCA: 37] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
The case history is presented of a patient with pathologically proven dendriform pulmonary ossification and rare earth pneumoconiosis confirmed by analytical transmission electron microscopy. This is thought to be the first report of this association.
Collapse
|
49
|
Song JS, Court LE, Cormack RA. SU-FF-T-291: Monte Carlo Calculation of Rectal Dose When Using An Endorectal Balloon During Prostate Radiation Therapy. Med Phys 2005. [DOI: 10.1118/1.1998020] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
|
50
|
Jeong SH, Bae IK, Kwon SB, Lee JH, Jung HI, Song JS, Jeong BC, Kim SJ, Lee SH. Investigation of extended-spectrum beta-lactamases produced by clinical isolates of Klebsiella pneumoniae and Escherichia coli in Korea. Lett Appl Microbiol 2004; 39:41-7. [PMID: 15189286 DOI: 10.1111/j.1472-765x.2004.01537.x] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
AIMS Isolates obtained from various regions in Korea in 2002 were identified and their susceptibility to extended-spectrum cephalosporins, monobactams and/or cephamycins was studied along with any production of extended-spectrum beta-lactamases (ESBLs). METHODS AND RESULTS Bacteria identified by the conventional techniques and Vitek GNI card were Klebsiella pneumoniae and Escherichia coli. Using disk diffusion and double-disk synergy tests, we found that 39.2% of strains produced ESBLs. About 52% of isolates transferred resistance to ceftazidime by conjugation. Banding patterns of PCR amplification with the designed primers showed that 837- and 259-bp fragments specific to bla(TEM) genes were amplified in 63.3% of strains. 929- and 231-bp fragments (bla(SHV)), 847- and 520-bp fragments (bla(CMY)), 597- and 858-bp fragments (bla(CTX-M)) were amplified in 61.5, 17.3 and 7.7% of strains respectively. About 51.9% of strains contained more than two types of beta-lactamase genes. Especially, one strain contained bla(TEM), bla(CMY) and bla(CTX-M) genes. SIGNIFICANCE Resistance mechanisms to beta-lactams, comprising mostly ESBL production, lead to the resistance against even recently developed beta-lactams in enterobacteria, which is now a serious threat to antibiotic therapy. The high prevalence of bla(CMY) genes and multidrug-resistant genes may also make therapeutic failure and lack of eradiation of these strains by extended-spectrum cephalosporins or cephamycins.
Collapse
|