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Chung JW, Park S, Chung MJ, Park JY, Park SW, Chung JB, Song SY. A novel disposable, transnasal esophagoscope: a pilot trial of feasibility, safety, and tolerance. Endoscopy 2012; 44:206-9. [PMID: 22271030 DOI: 10.1055/s-0031-1291483] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
A novel disposable transnasal esophagoscope, the E.G. Scan (IntroMedic Co. Ltd., Seoul, Korea), was developed for the evaluation of esophageal diseases while eliminating the inconvenience associated with sterilization, portability, patient monitoring, complications, and the economic burden of sedation. The feasibility, safety, and tolerability of the first version of the E.G. Scan was evaluated in this pilot study. Nasal esophagoscopy was performed successfully in 46 patients with known or suspected esophageal diseases. At least 50% of the Z-line was visualized by the E.G. Scan in 38 (82.6%) of 46 patients. Abnormalities were identified in 27 patients: erosive esophagitis (n=18), Barrett's esophagus (n=1), esophageal varices (n=7), and esophageal candidiasis (n=1). Nasal pain was absent or mild in most patients, and adverse events were not observed. Further technical improvement of the E.G. Scan would increase the diagnostic usefulness in future clinical practice.
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Affiliation(s)
- J W Chung
- Division of Gastroenterology, Department of Internal Medicine, Yonsei Institute of Gastroenterology, Yonsei University College of Medicine, Seoul, Republic of Korea
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102
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Park TJ, Lee SJ, Pan JG, Jung HC, Park JY, Park JP, Lee SY. DNA capturing machinery through spore-displayed proteins. Lett Appl Microbiol 2011; 53:445-51. [PMID: 21801185 DOI: 10.1111/j.1472-765x.2011.03131.x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
AIMS The purpose of this study was to develop a general method for the facile development of a new DNA biosensor which utilizes streptavidin-displayed spores as a molecular machinery. METHODS AND RESULTS Fluorescence spectroscopy was used as a monitoring tool for the streptavidin displayed on the surface of Bacillus thuringiensis spores and as a diagnosis method for DNA detection. As a proof-of-concept, four pathogenic bacteria including Pseudomonas aeruginosa, Acinetobacter baumannii, Escherichia coli and Klebsiella pneumonia were used for the detection of pathogenic species. In addition, a set of mutant variants of Wilson's disease were also used for the detection of single nucleotide polymorphism (SNP) in this system. CONCLUSIONS This strategy, utilizing streptavidin-displayed spores, is capable of capturing DNA targets for the detection of pathogenic bacteria and for mutation analysis in Wilson's disease. SIGNIFICANCE AND IMPACT OF THE STUDY This approach could be useful as a simple platform for developing sensitive spore-based biosensors for any desired DNA targets in diagnostic applications.
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Affiliation(s)
- T J Park
- BioProcess Engineering Research Center, KAIST, Daejeon, Korea
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Ahn JK, Kim JS, Lee HM, Kim H, Kim TH, Park JN, Kang YS, Lee HS, Kim SJ, Park JY, Ryu SY, Kim HC, Kang WG, Kim SK. Measurement limits to 134Cs concentration in soil. Appl Radiat Isot 2011; 69:1294-8. [PMID: 21592803 DOI: 10.1016/j.apradiso.2011.05.006] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2009] [Revised: 01/10/2011] [Accepted: 05/03/2011] [Indexed: 10/18/2022]
Abstract
We investigate the caesium concentrations in soils in mountain areas near Gori nuclear power plant in Korea, focusing on the measurement limits to the (134)Cs. In order to lower the minimum detectable amount (MDA) of activity for the (134)Cs, we have used the ammonium molybdophosphate (AMP) precipitation method to get rid of the (40)K existing in natural radioactivity, which reduces the MDA activity about 10 times smaller than those without the AMP precipitation method. The MDA results for the (134)Cs were found to be in the range between 0.015 and 0.044 Bq/kg-dry weight. In order to diminish the background, we also have measured a part of the soil samples in Yangyang, a small town in the east coast of Korea. However, it turns out that in order to detect the (134)Cs in the samples the MDA should be reduced to the level of mBq/kg-dry weight.
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Affiliation(s)
- J K Ahn
- Department of Physics, Pusan National University, Pusan, Republic of Korea
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Jeong JC, Lee H, Lee SW, Park JY, Ahn SY, Park H, Kim EC, Park SS, Ahn C, Oh KH. Fungal peritonitis due to Scedosporium prolificans. Perit Dial Int 2011; 31:213-5. [PMID: 21427256 DOI: 10.3747/pdi.2009.00234] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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105
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Park JY, Mitrou PN, Keogh RH, Luben RN, Wareham NJ, Khaw KT. Self-reported and measured anthropometric data and risk of colorectal cancer in the EPIC-Norfolk study. Int J Obes (Lond) 2011; 36:107-18. [PMID: 21427695 DOI: 10.1038/ijo.2011.61] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
BACKGROUND Epidemiological studies have shown inconsistent results for the association between body size and colorectal cancer (CRC) risk. Inconsistencies may be because of the reliance on self-reported measures of body size. OBJECTIVE We examined the association of self-reported and directly assessed anthropometric data (body height, weight, body mass index (BMI), waist, hip, waist-to-hip ratio (WHR) and chest circumference) with CRC risk in the EPIC-Norfolk study. DESIGN A total of 20,608 participants with complete self-reported and measured height and weight and without any history of cancer were followed up an average of 11 years, during which 357 incident CRC cases were recorded. Hazard Ratios (HRs) and 95% confidence intervals (CIs) were estimated using Cox proportional hazards models. RESULTS After adjustment for confounders, HRs among women in the highest quintile of the body size measure relative to the lowest quintile showed that measured height (HR=1.98, 95% CI=1.19-3.28, P (trend)=0.009), measured waist circumference (HR=1.65, 95% CI=0.97-2.86, P (trend)=0.009) and measured WHR (HR=2.07, 95% CI=1.17-3.67, P (trend)=0.001) were associated with increased CRC risk. Associations using corresponding self-reported measures were attenuated and not statistically significant. Conversely, the association of BMI with CRC risk in women was weaker using measured BMI (HR=1.57, 95% CI=0.91-2.73, P (trend)=0.05) compared with self-reported BMI (HR=1.97, 95% CI=1.18-3.30, P (trend)=0.02). In men no significantly increased CRC risk was observed with any of the anthropometric measures. CONCLUSIONS Measured height, waist circumference and WHR were associated with CRC risk in women, whereas any significant associations with those measures were attenuated when self-reported data were used.
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Affiliation(s)
- J Y Park
- Department of Public Health and Primary Care, University of Cambridge, Cambridge, United Kingdom.
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Park JY, Oh SA, Anderson AJ, Neiswender J, Kim JC, Kim YC. Production of the antifungal compounds phenazine and pyrrolnitrin from Pseudomonas chlororaphis O6 is differentially regulated by glucose. Lett Appl Microbiol 2011; 52:532-7. [PMID: 21362001 DOI: 10.1111/j.1472-765x.2011.03036.x] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
AIMS To determine whether glucose in growth medium affects secondary metabolite production and biocontrol efficacy of Pseudomonas chlororaphis O6. METHODS AND RESULTS The secondary metabolites pyrrolnitrin and phenazines antagonize phytopathogenic fungi. The expression of the prnA gene encoding tryptophan halogenase, the first step in pyrrolnitrin biosynthesis, required the stationary-phase sigma factor, RpoS. Mutations in rpoS and prnA in Ps. chlororaphis O6 eliminated antifungal activity against Rhizoctonia solani and Fusarium graminearum. Pyrrolnitrin production was reduced by glucose in growth media, whereas phenazine levels were increased. The efficacy of Ps. chlororaphis O6 in the biocontrol of tomato late blight was reduced by addition of glucose to the growth medium. CONCLUSIONS Regulation by glucose of pyrrolnitrin production influenced the efficacy of the biocontrol of tomato leaf blight. SIGNIFICANCE AND IMPACT OF THE STUDY The nutritional regulation of secondary metabolite production from a soil pseudomonad may account, at least in part, for the variability of biocontrol under field conditions.
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Affiliation(s)
- J Y Park
- Department of Plant Biotechnology, Chonnam National University, Gwangju, Korea
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Abstract
BACKGROUND Aspirin has received increasing attention owing to its potential as a chemopreventive agent against lung cancer. Previous observational studies have reported inconsistent findings on this issue. We investigated the association between aspirin use and risk for lung cancer by conducting a meta-analysis. PATIENTS AND METHODS Relevant studies were identified by searching Medline, EMBASE, and Cochrane Library to December 2009. We also reviewed relevant bibliographies from the retrieved articles. Two authors independently extracted data and assessed study quality. Disagreements were resolved by consensus. RESULTS Fifteen studies (six case-control studies and nine prospective cohort studies) were included in the final meta-analysis. When all studies were pooled, the odds ratio (OR) of aspirin use for lung cancer risk was 0.86 [95% confidence interval (CI) 0.76-0.98]. In subgroup meta-analyses, there was no association between aspirin use and lung cancer risk among cohort studies (relative risk, 0.97; 95% CI 0.87-1.08), while there was a significant association among case-control studies (OR, 0.74; 95% CI 0.57-0.99). In a subgroup meta-analysis by quality of study methodology, a significant protective effect of aspirin use on lung cancer was observed only among eight low-quality studies (OR, 0.82; 95% CI 0.68-0.99), but not among seven high-quality studies (OR, 0.90; 95% CI 0.76-1.07). CONCLUSIONS Overall, the findings of this meta-analysis support that there was no association between aspirin use and lung cancer risk. Our findings should be confirmed in future prospective cohort studies or randomized, controlled trials.
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Affiliation(s)
- S-W Oh
- Department of Family Medicine, Healthcare System Gangnam Center, Seoul National University Hospital, Seoul
| | - S-K Myung
- Cancer Epidemiology Branch, Research Institute, National Cancer Center, Goyang.
| | - J Y Park
- Department of Family Medicine, Kwangdong Oriental Hospital, Seoul, Korea
| | - C M Lee
- Department of Family Medicine, Healthcare System Gangnam Center, Seoul National University Hospital, Seoul
| | - H T Kwon
- Department of Family Medicine, Healthcare System Gangnam Center, Seoul National University Hospital, Seoul
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Choi SU, Shin HW, Jung HI, Park JY, Yoon SZ, Lee YS, Kim WY, Chang SH. Control of the haemodynamic response to surgical stimuli in semi-closed circuit or closed circuit anaesthesia using a multifunctional anaesthesia system. J Int Med Res 2011; 38:1637-44. [PMID: 21309477 DOI: 10.1177/147323001003800508] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
This study compared the ability of the Zeus multifunctional anaesthesia system to control haemodynamic response to surgical stimulation in semi-closed (SCA) or closed circuit anaesthesia (CCA) modes. Fifty patients undergoing gynaecological surgery were randomly assigned to SCA or CCA. Anaesthesia was induced with 2 mg propofol and 0.9 mg/kg rocuronium, intravenously, and maintained using sevoflurane (minimum alveolar concentration [MAC], 1.0) using 2 l/min oxygen plus 2 l/min nitrous oxide (SCA 4 l/min group) or 50% oxygen plus 50% nitrous oxide (CCA group). An increase in mean arterial pressure (MAP) > 20% above baseline in response to surgical stimulation provoked a stepwise increase in sevoflurane (1.3 MAC and then 1.6 MAC), followed by fentanyl 1 pg/kg intravenously (rescue drug). The time required for MAP to return to within 10% of baseline was significantly shorter in the CCA group (6.4 +/- 3.6 min) compared with the SCA 4 l/min group (10.2 +/- 6.0 min). The percentage of patients requiring fentanyl was significantly greater in the SCA 4 l/min group than in the CCA group. In conclusion, CCA controlled acute haemodynamic responses to surgical stimuli more successfully and rapidly than SCA 4 l/min, using a multifunctional anaesthesia machine.
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Affiliation(s)
- S U Choi
- Department of Anaesthesiology and Pain Medicine, Korea University Anam Hospital, Seoul, Republic of Korea
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109
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Na II, Park JY, Kim KM, Cheon GJ, Choe DH, Koh JS, Baek HJ, Lee JC. Significance of smoking history and FDG uptake for pathological N2 staging in clinical N2-negative non-small-cell lung cancer. Ann Oncol 2011; 22:2068-2072. [PMID: 21257671 DOI: 10.1093/annonc/mdq693] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
BACKGROUND This study was conducted to evaluate whether smoking history and the standardized uptake value (SUV) of 2-[fluorine-18]fluoro-2-deoxy-D-glucose (FDG) uptake are associated with unexpected pathological N2 status (pN2) in non-small-cell lung cancer (NSCLC). PATIENTS AND METHODS We analyzed the data of 220 patients who underwent surgical resection with clinical N2-negative status on computed tomography (CT) and positron emission tomography (PET)-CT. The maximum SUV of primary tumor was chosen for logistic analysis. RESULTS Seventy-two patients (33%) had never smoked. The SUV ranged from 1.0 to 29.0 (median 9.1). In univariate analysis, adenocarcinomas (P = 0.019), female gender (P = 0.010), N1 on CT (P = 0.025), and N1 PET-CT (P = 0.001) were associated with a high probability of pN2. The proportion of pN2 in never smokers was higher than in ever smokers (26% versus 10% respectively; P = 0.002). The SUV remained on a multivariate logistic model (odds ratio 1.1; 95% confidence interval 1.0-1.2; P = 0.010) and it had a better predictive value in never smokers than in ever smokers (P = 0.017). CONCLUSIONS This study indicates an association between smoking history and pN2 in clinically negative N2 NSCLC. The different roles of FDG uptake were also suggested based on smoking history.
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Affiliation(s)
- I I Na
- Department of Internal Medicine.
| | - J Y Park
- Department of Nuclear Medicine, Korea Cancer Center Hospital, Korea Institute of Radiological and Medical Sciences
| | - K M Kim
- Department of Nuclear Medicine, Korea Cancer Center Hospital, Korea Institute of Radiological and Medical Sciences
| | - G J Cheon
- Department of Nuclear Medicine, Korea University Medical Center Anam Hospital, Seoul
| | | | | | - H J Baek
- Thoracic Surgery, Korea Cancer Center Hospital, Korea Institute of Radiological and Medical Sciences, Seoul, Korea
| | - J C Lee
- Department of Internal Medicine
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Kim HK, Kim CH, Jung YJ, Bae SJ, Choe J, Park JY, Lee KU. Association of restrictive ventilatory dysfunction with insulin resistance and type 2 diabetes in koreans. Exp Clin Endocrinol Diabetes 2011; 119:47-52. [PMID: 21246464 DOI: 10.1055/s-0030-1268467] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
AIMS To investigate associations of obstructive and restrictive patterns of ventilatory dysfunction with insulin resistance and type 2 diabetes mellitus (DM) in Koreans. METHODS We cross-sectionally examined clinical, laboratory, and pulmonary function data on 35,456 Korean adults (age 18-93 years, 40% women) recorded during regular health check-ups. Insulin resistance (IR) was determined from fasting serum insulin concentration and homeostasis model assessment (HOMA). RESULTS Individuals with type 2 DM and those with pre-diabetes (impaired fasting glucose levels) showed a higher prevalence of both restrictive (18% and 11%, respectively, VS. 8%; P<0.01) and obstructive (4.3% and 3.2%, respectively, VS. 2.3%; P<0.01) ventilatory dysfunction than did individuals with normal fasting glucose levels. Compared to subjects with normal ventilatory function, those with restrictive or obstructive ventilatory dysfunction were older, had higher systolic and diastolic blood pressure, and had elevated glucose and HbA1c levels. However, serum triglyceride, fasting insulin, and HOMA-IR were higher only in subjects with restrictive ventilatory dysfunction, and not in those with obstructive ventilatory dysfunction. On logistic regression analysis, the age and gender-adjusted odds ratio (OR) of restrictive ventilatory dysfunction for type 2 DM was 1.59 (95% confidence interval, 1.43-1.78). The increased OR remained significant after controlling for exercise, drinking, and smoking habits, presence of hypertension, body mass index, and waist circumference (OR=1.38 [1.23-1.55]). However, further adjustment for HOMA-IR attenuated the OR (1.11 [0.97-1.26]), making the OR statistically insignificant. In contrast, obstructive ventilatory dysfunction was not independently related to type 2 DM status. CONCLUSION Restrictive ventilatory dysfunction is independently associated with type 2 DM, probably VIA insulin resistance.
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Affiliation(s)
- H-K Kim
- Health Promotion Center, Asan Medical Center, Department of Internal Medicine, University of Ulsan College of Medicine, Seoul, Korea.
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111
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Park JY, Mitrou PN, Keogh RH, Luben RN, Wareham NJ, Khaw KT. Effects of body size and sociodemographic characteristics on differences between self-reported and measured anthropometric data in middle-aged men and women: the EPIC-Norfolk study. Eur J Clin Nutr 2010; 65:357-67. [PMID: 21179050 DOI: 10.1038/ejcn.2010.259] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
BACKGROUND/OBJECTIVES To investigate the effects of body size and sociodemographic characteristics on differences between self-reported (SR) and measured anthropometric data in men and women. SUBJECTS/METHODS This study comprises 9933 men and 11,856 women aged 39-79 years at baseline survey (1993-1997) in the EPIC-Norfolk study (Norfolk arm of the European Investigation into Cancer and Nutrition Study). The effects of sex, measured height, weight, age group, educational level and social class on differences between SR and measured weight, height, body mass index (BMI), waist, hip and waist-to-hip ratio (WHR) were examined. RESULTS There were systematic differences between SR and measured anthropometric measurements by sex, measured height, weight and sociodemographic characteristics. Height was overestimated in both sexes while weight, waist, hip, and consequently, BMI and WHR were underestimated. Being male, shorter, heavier, older, and having no educational qualifications and manual occupation were independently associated with overreporting of height, and underreporting of weight was associated independently with being female, shorter, heavier, younger age, and higher education level and social class. Underreporting of waist circumference was strongly associated with being female and higher measured waist circumference, while underreporting of hip circumference was associated with being male and higher measured hip circumference. Furthermore, there was substantial degree of misclassification of BMI and waist circumference categories for both general and central obesity associated with SR data. CONCLUSIONS These findings suggest that errors in SR anthropometric data, especially waist and hip circumference are influenced by actual body size as well as sociodemographic characteristics. These systematic differences may influence associations between SR anthropometric measures and health outcomes in epidemiological studies.
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Affiliation(s)
- J Y Park
- Department of Public Health and Primary Care, University of Cambridge, Cambridge, UK
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112
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Rhee EJ, Lee WY, Yoon KH, Yoo SJ, Lee IK, Baik SH, Kim YK, Lee MK, Park KS, Park JY, Cha BS, Lee HW, Min KW, Bae HY, Kim MJ, Kim JA, Kim DK, Kim SW. A multicenter, randomized, placebo-controlled, double-blind phase II trial evaluating the optimal dose, efficacy and safety of LC 15-0444 in patients with type 2 diabetes. Diabetes Obes Metab 2010; 12:1113-9. [PMID: 20977584 DOI: 10.1111/j.1463-1326.2010.01303.x] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
AIM The objective of this study was to evaluate the optimal dose, efficacy and safety of a novel dipeptidyl peptidase-4 (DPP-IV) inhibitor, LC15-0444, in Korean subjects with type 2 diabetes mellitus treated by diet and exercise. METHODS This study was a double-blind, randomized, multicenter and parallel-group, dose-range finding study. We enrolled 145 patients (91 men and 54 women) with a median age of 53 years and a median body mass index of 25.1 kg/m(2) . The median baseline fasting plasma glucose (FPG) was 8.1 mmol/l, the median HbA1c was 7.9% and the median time since the diagnosis of diabetes was 3 years. After 2 weeks of an exercise/diet programme followed by 2 weeks of a placebo period, the subjects were randomized to one of the four following groups for a 12-week active treatment period: placebo and 50, 100 or 200 mg of LC15-0444. RESULTS All three doses of LC15-0444 significantly reduced the HbA1c from baseline compared to the placebo group (-0.06 vs. -0.98, -0.74 and -0.78% in the placebo and 50, 100 and 200 mg groups, respectively), without a significant difference between the doses. Subjects with a higher baseline HbA1c (≥8.5%) had a greater reduction in HbA1c. Insulin secretory function, as assessed using homeostasis model assessment-beta cell, C-peptide and the insulinogenic index, improved significantly with LC15-0444 treatment. Insulin sensitivity, as assessed using homeostasis model assessment-insulin resistance, also improved significantly after 12 weeks of treatment. The 50 and 200 mg groups had significantly reduced total cholesterol and low-density lipoprotein cholesterol levels at 12 weeks compared to the placebo group. No dosage of LC15-0444 affected weight or waist circumference. The incidences of adverse events were similar in all study subjects. CONCLUSIONS LC15-0444 monotherapy (50 mg for 12 weeks) improved the HbA1c, FPG level, oral glucose tolerance test results, β-cell function and insulin sensitivity measures, and was well tolerated in Korean subjects with type 2 diabetes.
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Affiliation(s)
- E J Rhee
- Department of Internal Medicine, Kangbuk Samsung Hospital, Sungkyunkwan University School of Medicine, Seoul, Korea
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Kang RH, Chang HS, Wong ML, Choi MJ, Park JY, Lee HY, Jung IK, Joe SH, Kim L, Kim SH, Kim YK, Han CS, Ham BJ, Lee HJ, Ko YH, Lee MS, Lee MS. Brain-derived neurotrophic factor gene polymorphisms and mirtazapine responses in Koreans with major depression. J Psychopharmacol 2010; 24:1755-63. [PMID: 19493959 DOI: 10.1177/0269881109105457] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Brain-derived neurotrophic factor (BDNF) is a candidate molecule for influencing the clinical response to antidepressant treatment. The aims of this study were to determine the relationship between the Val66Met polymorphism in the BDNF gene and the response to mirtazapine in 243 Korean subjects with major depressive disorder (MDD). The reduction in the Hamilton Depression score over the 8-week treatment period was not influenced by BDNF V66M genotypes. A marginal effect of genotype on somatic anxiety score was observed at baseline (P = 0.047 in the dominant model). However, genotype-time interaction had no effect on somatic anxiety score after the 8-week a treatment period. Plasma BDNF levels tended to increase during mirtazapine treatment, although without statistical significance (P = 0.055). After 8 weeks of mirtazapine treatment, plasma BDNF levels were higher in Met allele homozygotes (1499.7 ± 370.6 ng/mL) than in Val allele carriers (649.7 ± 158.5 ng/mL, P = 0.049). Our results do not support the hypothesis that the Val66Met promoter polymorphism in the BDNF gene influences the therapeutic response to mirtazapine in Korean MDD patients. However, our data indicate that this polymorphism results in increased plasma BDNF after mirtazapine treatment.
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Affiliation(s)
- R H Kang
- Department of Psychiatry, College of Medicine, Korea University, Seoul, Republic of Korea
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Park JY, Kim YS, Shin DH, Choi JS, Kim KH, Bae YK. Primary cutaneous peripheral T-cell lymphoma in a patient with X-linked agammaglobulinaemia. Br J Dermatol 2010; 164:677-9. [PMID: 21083545 DOI: 10.1111/j.1365-2133.2010.10142.x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
MESH Headings
- Adult
- Agammaglobulinemia/complications
- Antigens, CD/analysis
- Genetic Diseases, X-Linked/complications
- Humans
- Immunohistochemistry
- Lymphoma, T-Cell, Cutaneous/immunology
- Lymphoma, T-Cell, Cutaneous/pathology
- Lymphoma, T-Cell, Peripheral/immunology
- Lymphoma, T-Cell, Peripheral/pathology
- Male
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115
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Park JY, Kwon YC, Lee KH, Kim HN, Lee KY, Kim DM. Screening of optimal ribosome binding sites (RBSs) for high-level protein expression in a cell-free protein synthesis system derived from Streptomyces venezuelae. J Biotechnol 2010. [DOI: 10.1016/j.jbiotec.2010.09.853] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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In HS, Lee HY, Park JY, Kim SY, Jung JH, Kim JS, Kim SJ, Suh DC. Intracranial stenting in patients with atherosclerotic stenosis associated with various aneurysms in the same diseased arterial segment. AJNR Am J Neuroradiol 2010; 31:1895-8. [PMID: 20671060 DOI: 10.3174/ajnr.a2208] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
BACKGROUND AND PURPOSE Aneurysms are rarely associated with symptomatic intracranial stenosis. We report the results of recanalization by stent placement in patients with symptomatic severe intracranial stenosis associated with adjacent aneurysms. MATERIALS AND METHODS Of 139 patients who underwent intracranial stent placement during a 5-year period, 10 (7%) had symptomatic severe intracranial stenosis associated with adjacent aneurysms. Five were in the VA, 3 in the BA, and 2 in M1. The types of aneurysm were atherosclerotic fusiform (n = 5), ulcerative (n = 4), and saccular (n = 1). We analyzed angiographic findings based on biplane and 3D angiograms and assessed patient outcomes and complications after stent placement. The results were compared with those of a control group without aneurysms who underwent stent placement during the same study period. RESULTS Aneurysm locations were post- (n = 6), in- (n = 2), and pre-stenotic (n = 2). After angioplasty with stent placement and/or aneurysm embolization, there were no lesion-related strokes or deaths during a median follow-up period of 25 months (range, 11-43 months). One patient had asymptomatic restenosis. The final mRS score was good (≤2) in all patients. There were no statistically significant differences in event or restenosis rates compared with the control group. CONCLUSIONS Adjacent aneurysms were rarely associated with severe intracranial stenosis but were more common in the posterior circulation. Intracranial stent placement may be performed without additional stroke risk, regardless of the type and location of the aneurysm.
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Affiliation(s)
- H S In
- Department of Radiology, Asan Medical Center, University of Ulsan, Seoul, Korea
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Chin JH, Park JY, Kim YK, Kim SH, Kong YG, Park PH, Hwang GS. Torsades de pointes triggered by severe diastolic hypotension with low hematocrit in the neohepatic stage of liver transplantation: a case report. Transplant Proc 2010; 42:1959-62. [PMID: 20620555 DOI: 10.1016/j.transproceed.2010.02.093] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2009] [Revised: 12/15/2009] [Accepted: 02/02/2010] [Indexed: 01/01/2023]
Abstract
We have described herein a 39-year-old male patient with hepatitis B virus-related cirrhosis (Child class C), showing a prolonged corrected QT interval, who developed torsades de pointes (TdP) in the neohepatic stage of liver transplantation (LT). There was no arrhythmia in the pre-anhepatic and anhepatic stages. Multiple premature ventricular complexes, ventricular tachycardia, and TdP suddenly developed at 16 minutes after graft reperfusion without any prodromal arrhythmia; they persisted for 118 seconds. Laboratory tests showed that serum potassium, calcium, and magnesium concentrations of 4.7 mmol/L, 1.05 mmol/L, and 1.85 mg/dL, respectively were within normal ranges. Likely causative factors for TdP in this patient included a prolonged corrected QT interval (553 msec), a low hematocrit (21%), and a low arterial blood pressure (systolic blood pressure, 80-90 mm Hg; diastolic blood pressure; 20-26 mm Hg) in the neohepatic stage. This case demonstrated the importance of optimal maintenance of coronary perfusion, with an adequate hematocrit level and electrolyte concentrations, to prevent the development of TdP in cirrhotic patients with a prolonged corrected QT interval during LT.
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Affiliation(s)
- J H Chin
- Department of Anesthesiology and Pain Medicine, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea
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Park JY, Lee YH, Yang KY, Kim YC. AiiA-mediated quorum quenching does not affect virulence or toxoflavin expression in Burkholderia glumae SL2376. Lett Appl Microbiol 2010; 51:619-24. [PMID: 21039666 DOI: 10.1111/j.1472-765x.2010.02940.x] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
AIM The primary objective of this study was to determine the effects of quorum quenching in the pathogenicity and toxoflavin production of Burkholderia glumae causing bacterial rice grain rot. METHODS AND RESULTS An acyl-homoserine lactonase (aiiA) gene from Bacillus sp. was expressed in B. glumae under the control of a constitutive promoter. Acyl-homoserine lactone production in the aiiA-transformants was reduced significantly, and the aiiA-expressing B. glumae strain reduced the severity of soft rot when the strain was co-inoculated with a soft-rot pathogen, Pectobacterium carotovorum ssp. carotovorum SCCI. However, the aiiA-transformant still caused rice seedling rot and rice grain rot. The aiiA-expressing strains had wild-type levels of transcription from the genes in the toxoflavin biosynthetic operon, and as well as wild-type levels of toxin production. CONCLUSIONS Our results show that aiiA-mediated quorum quenching does not affect virulence or toxoflavin production in B. glumae. SIGNIFICANCE AND IMPACT OF THE STUDY Indirect quorum quenching may prove an ineffective approach to the control of rice grain rot, because it reduces, but does not eliminate entirely homoserine lactones in B. glumae. Virulence of rice grain rot was retained despite reduction in homoserine lactones by the expression of aiiA in B. glumae.
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Affiliation(s)
- J Y Park
- Department of Plant Biotechnology, Chonnam National University, Gwangju, Korea
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You JS, Chung YE, Park JY, Park JW, Hwang TS. Unexpected failure of central venous catheterisation for resuscitation. Emerg Med J 2010; 27:340. [PMID: 20360494 DOI: 10.1136/emj.2009.090076] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Affiliation(s)
- J S You
- Department of Emergency Medicine and Critical Care Medicine, Seo-Ulsan Boram Hospital, Ulsan, Republic of Korea
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Park JY, Shin HW, Jeon SK, Choi SU, Kim WY, Lee HW, Lim HJ, Yoon SM, Chang SH. A Comparison of Consumption and Recovery Profiles According to Anaesthetic Circuit Mode using a New Multifunctional Closed-Circuit Anaesthesia System during Desflurane Anaesthesia: A Clinical Study. J Int Med Res 2010; 38:160-8. [DOI: 10.1177/147323001003800118] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
This clinical study compared induction time, consumed anaesthetic dose, and haemodynamic and recovery profiles when using a new type of multifunctional anaesthesia machine (Zeus®) in semi-closed or closed circuit modes. Sixty female patients undergoing gynaecological surgery were randomly assigned to three groups and received desflurane anaesthesia through a semi-closed circuit (SCC) at fresh gas flow rates of 4 l/min (SCC 4 l/min) or 2 l/min (SCC 2 l/min), or through a closed circuit (CC). Anaesthesia was maintained at the minimum alveolar concentration for blocking the adrenergic response to painful stimulus (MACBAR) (4.6% end-tidal desflurane) during each operation. The time required to reach MACBAR was significantly shorter and the dose of desflurane was significantly smaller in the CC group compared with the other groups. There were no differences in haemodynamic and recovery profiles between the groups. It is concluded that the CC mode allowed a faster and more reliable induction, lower anaesthetic consumption and stable haemodynamic and recovery profiles.
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Affiliation(s)
- JY Park
- Department of Anaesthesiology and Pain Medicine, Korea University Anam Hospital, Seoul, Korea
| | - HW Shin
- Department of Anaesthesiology and Pain Medicine, Korea University Anam Hospital, Seoul, Korea
| | - SK Jeon
- Department of Anaesthesiology and Pain Medicine, Korea University Anam Hospital, Seoul, Korea
| | - SU Choi
- Department of Anaesthesiology and Pain Medicine, Korea University Anam Hospital, Seoul, Korea
| | - WY Kim
- Department of Anaesthesiology and Pain Medicine, Korea University Ansan Hospital, Ansan, Korea
| | - HW Lee
- Department of Anaesthesiology and Pain Medicine, Korea University Anam Hospital, Seoul, Korea
| | - HJ Lim
- Department of Anaesthesiology and Pain Medicine, Korea University Anam Hospital, Seoul, Korea
| | - SM Yoon
- Department of Anaesthesiology and Pain Medicine, Korea University Anam Hospital, Seoul, Korea
| | - SH Chang
- Department of Anaesthesiology and Pain Medicine, Korea University Anam Hospital, Seoul, Korea
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Hong DG, Chong GO, Seong WJ, Lee YS, Cho YL, Park JY, Chae JM, Park IS. A case of ovarian endometrioid adenocarcinoma with yolk sac tumor in a 35-year-old woman. EUR J GYNAECOL ONCOL 2010; 31:471-474. [PMID: 20882900] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
Ovarian yolk sac tumor (YST) is a malignant ovarian neoplasm differentiated from primordial germ cells that occur in young age, while endometrioid carcinoma (ECA) is a müllerian epithelial tumor that usually occurs in older patients. The coexistence of an ovarian ECA and YST component is very rare. Only 12 cases have been reported until now according to a Medline search of the English literatures. We present a case of a simultaneous ECA and a YST component in a 35-year-old woman. Exploratory laparotomy was performed. The parts of both ovaries that showed an endometrioid-like glandular pattern were positive for cytokeratin 7 and negative for AFP, but the YST component was negative for cytokeratin 7 and positive for AFP. After completion of four courses of BEP chemotherapy, two courses of taxane and carboplatin chemotherapy were added. The patient failed to respond and succumbed to the disease after 12 months of follow-up.
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Affiliation(s)
- D G Hong
- Department of Obstetrics and Gynecology, Kyungpook National University Hospital, Daegu (Republic of Korea)
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Lim WS, Park JB, Park JY, Park BJ, Yeom GY. Low damage atomic layer etching of ZrO2 by using BCl3 gas and ar neutral beam. J Nanosci Nanotechnol 2009; 9:7379-7382. [PMID: 19908792 DOI: 10.1166/jnn.2009.1748] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
This study examined the etch characteristics of ZrO2 etched using an atomic layer etching (ALET) system with BCl3 gas for adsorption and an Ar neutral beam for desorption. The effect of the BCl3 gas pressure and Ar neutral beam dose on the etch characteristics was examined. The results showed that the ZrO2 etch rate was maintained at a constant etch rate of 1.07 angstroms/cycle at a BCl3 gas pressure > 0.15 mTorr and an Ar beam flux > 1.485 x 1016 atoms/cm2 x cycle. Under these constant etch rate conditions, the surface roughness of the etched ZrO2 was similar to that of the as-received ZrO2. The surface composition of ZrO2 etched by ALET was compared with that etched by BCl3 inductively coupled plasma (ICP). The surface composition of ZrO2 etched by ALET showed a similar composition to that of the as-received ZrO2 while that etched by BCl3 ICP showed a Zr-rich surface.
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Affiliation(s)
- W S Lim
- SKKU Advanced Institute of Nano Technology, Sungkyunkwan University, Suwon, Kyunggi-do 440-746, Korea
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123
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Lee CK, Park JY, Lee TH, Lee SH, Chung IK, Park SH, Kim HS, Kim SJ. Superselective microcoil embolization for endoscopically uncontrollable bleeding after endoscopic submucosal dissection. Endoscopy 2009; 41 Suppl 2:E109-10. [PMID: 19544251 DOI: 10.1055/s-0029-1214627] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- C K Lee
- Division of Gastroenterology, Department of Internal Medicine, Soonchunhyang University College of Medicine, Cheonan Hospital, Cheonan, Korea.
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Kim JG, Chae YS, Sohn SK, Moon JH, Kang BW, Park JY, Jeon SW, Lee MH, Lim KH, Choi GS, Jun SH. IVS10+12A>G polymorphism in hMSH2 gene associated with prognosis for patients with colorectal cancer. Ann Oncol 2009; 21:525-529. [PMID: 19759184 DOI: 10.1093/annonc/mdp338] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
BACKGROUND The polymorphisms in DNA repair genes may contribute to a variation in the DNA repair capacity, thereby affecting the risk of carcinogenesis and prognosis of colorectal cancer. Accordingly, the present study analyzed 14 polymorphisms in DNA repair genes and their impact on the prognosis for patients with colorectal cancer. MATERIALS AND METHODS Three hundred and ninety-seven consecutive patients with curatively resected colorectal adenocarcinoma were enrolled in the present study. The genomic DNA was extracted from fresh colorectal tissue and 14 polymorphisms of DNA repair genes determined using a real-time PCR genotyping assay. RESULTS The median age of the patients was 63 years, and 218 (54.9%) patients had colon cancer, while 179 (45.1%) patients had rectal cancer. A multivariate survival analysis, including age, differentiation, carcinoembryonic antigen level, and stage, revealed a better survival for the patients with the combined IVS10+12AG and GG genotype than for the patients with the IVS10+12AA genotype [disease-free survival: hazard ratio (HR) 0.47, 95% confidence interval (CI) 0.30-0.75, P = 0.002; overall survival: HR 0.50, 95% CI 0.26-0.98, P = 0.042]. None of the other polymorphisms was associated with survival. CONCLUSION The IVS10+12A>G polymorphism in the hMSH2 gene was found to be an independent prognostic marker for patients with colorectal cancer.
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Affiliation(s)
- J G Kim
- Department of Oncology/Hematology
| | - Y S Chae
- Department of Oncology/Hematology
| | - S K Sohn
- Department of Oncology/Hematology
| | - J H Moon
- Department of Oncology/Hematology
| | - B W Kang
- Department of Oncology/Hematology
| | - J Y Park
- Department of Internal Medicine and Biochemistry
| | | | - M-H Lee
- Department of Technology Center for Diagnosis and Prediction, Kyungpook National University Hospital, Kyungpook National University School of Medicine; D&P Biotech, Ltd
| | - K-H Lim
- Department of Surgery, Kyungpook National University Hospital, Kyungpook National University School of Medicine, Daegu, Korea
| | - G S Choi
- Department of Surgery, Kyungpook National University Hospital, Kyungpook National University School of Medicine, Daegu, Korea.
| | - S-H Jun
- Department of Surgery, Kyungpook National University Hospital, Kyungpook National University School of Medicine, Daegu, Korea
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125
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Kim ES, Jeon SW, Park SY, Park YD, Chung YJ, Yoon SJ, Lee SY, Park JY, Bae HI, Cho CM, Tak WY, Kweon YO, Kim SK, Choi YH. Where has the tumor gone? The characteristics of cases of negative pathologic diagnosis after endoscopic mucosal resection. Endoscopy 2009; 41:739-45. [PMID: 19693749 DOI: 10.1055/s-0029-1215043] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/10/2022]
Abstract
BACKGROUND AND STUDY AIMS Discrepancies can occur between the histopathological findings from forceps biopsy and endoscopic mucosal resection (EMR), and occasionally in embarrassing cases tumorous tissue is not found at EMR. The aim of the present study was to evaluate the clinical, endoscopic, and histological features of gastric tumors in patients with pathololgically negative findings at EMR. PATIENTS AND METHODS We retrospectively reviewed data from all patients with gastric tumor treated with EMR or endoscopic submucosal dissection (ESD) between August 1999 and April 2007 at our institution, and enrolled into the study patients with no tumor tissue found at mucosal resection. Their biopsy and EMR specimen slides were reviewed by a single pathologist. Patient characteristics, including demographic and clinical features, and the endoscopic appearance of mucosal lesions were evaluated. RESULTS Out of 633 patients treated with EMR or ESD, 20 patients (3.2 %) were included. The mean +/- SD maximal dimension of the mucosal lesions was 6.40 +/- 2.19 mm (range 3 - 10). Mean number of forceps biopsy fragments was 3.80 +/- 1.96 and mean sampling ratio was 2.08 +/- 1.07 mm/fragment. Before resection, histological findings from forceps biopsy were: 13 low grade dysplasias (65.0 %), 2 high grade dysplasias (10.0 %), and 5 intramucosal carcinomas (25.0 %). CONCLUSIONS In the case of pathologically negative findings at EMR, tumors might have been small enough to have been removed by the previous forceps biopsy. However, the possibility of sampling error or of a different location should be considered. Furthermore, appropriate communication between endoscopists and pathologists is essential.
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Affiliation(s)
- E S Kim
- Department of Internal Medicine, Division of Gastroenterology and Hepatology, Kyungpook National University Hospital, Daegu 700-721, Korea
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126
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Yoon H, Moon OK, More SJ, Park CK, Park JY, Lee YJ, Lee SD, Ha JK, Jeong SK, Jeong JW, Lee SJ. An outbreak of highly pathogenic avian influenza at a public animal exhibit in seoul, Korea, during 2008. Zoonoses Public Health 2009; 57:142-5. [PMID: 19638167 DOI: 10.1111/j.1863-2378.2009.01235.x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
This study describes the first recorded outbreak of HPAI in the city of Seoul, in captive birds held in an exhibition for public viewing at a local district office. The index cases were two pheasants, which had been introduced into the exhibit on 24 April, 4 days prior to death, from a store in a local market in Gyeonggi-do. Ducks and chickens from an HPAI outbreak farm, subsequently confirmed on 4 May, had also been held in this store. This outbreak highlights the potential role of local markets in AIV transmission. This outbreak led to considerable public health concern in Korea, however, no human cases were reported. The non-commercial poultry sector needs to be considered in national plans for preparedness and response.
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Affiliation(s)
- H Yoon
- Veterinary Epidemiology Division, National Veterinary Research and Quarantine Service, Anyang, Gyeonggi-do, Republic of Korea.
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Kobayashi T, Hara I, Matsuda Y, Park JY, Oshio S, Kaneko S, Umeda T, Akihama S. Detection and Separation of Two Kinds of Acidic Arginine Amidases from Boar Sperm Using Lima Bean Trypsin Inhibitor and Aprotinin Affinity Adsorptions. ACTA ACUST UNITED AC 2009; 28:7-13. [PMID: 1372493 DOI: 10.3109/01485019208987673] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
Two kinds of acidic arginine amidase activity were found in boar sperm. One enzyme was separated by a treatment consisting of lima bean trypsin inhibitor (LBTI) affinity adsorption and elution. The other enzyme was separated by aprotinin affinity adsorption and elution through the same solutions as those used for first enzyme; the two enzymes provisionally named boar sperm acidic arginine amidases 1 (BSAA-1) and 2 (BSAA-2), respectively. The amidolytic activity of BSAA-1 was increased by high concentrations of calcium chloride, while the activity of BSAA-2 was independent of calcium chloride. Their behavior with LBTI and aprotinin, and profiles of their substrate specificities, were also different. The affinity of LBTI to BSAA-1 was approximately 14 times higher than that to BSAA-2.
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Affiliation(s)
- T Kobayashi
- Department of Biochemistry, Meiji College of Pharmacy, Tokyo, Japan
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128
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Paik JK, Yeo HY, Kim HJ, Park JY, Lim HH, Lee JH, Jang Y, Lee JH. Abstract: P1428 ASSOCIATIONS OF SERUM LYCOPENE CONCENTRATION WITH BRACHIAL-ANKLE PULSE WAVE VELOCITY AND MARKERS OF OXIDATIVE STRESS AND INFLAMMATION. ATHEROSCLEROSIS SUPP 2009. [DOI: 10.1016/s1567-5688(09)71436-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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129
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Evans DE, Park JY, Maxfield N, Drobes DJ. Neurocognitive variation in smoking behavior and withdrawal: genetic and affective moderators. Genes Brain Behav 2009; 8:86-96. [PMID: 19220487 DOI: 10.1111/j.1601-183x.2008.00445.x] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A burgeoning literature suggests that attentional factors are associated with smoking behavior (e.g. direct nicotine effects and smoking withdrawal). This study examined differences in attentional processing between nonsmokers, satiated smokers and overnight nicotine-deprived smokers by comparing the amplitude of the P300 (P3) component of the event-related brain potential (ERP) elicited during a go-nogo task. We also examined the moderating effects of a common dopamine receptor genotype and state negative affect (SNA) on this ERP index of attention. Nonsmokers relative to smokers had greater nogo P3 amplitude. Carrying the A1 allele at the dopamine receptor D2 (DRD2) Taq1A polymorphism site moderated the effects of withdrawal on nogo P3 amplitude, suggesting the A1 allele is a vulnerability marker for withdrawal-related attentional deficits. Increased SNA also predicted attenuated P3 amplitude among deprived smokers. These findings suggest that DRD2 status and SNA moderate the effects of smoking status and withdrawal on neurocognitive variation during attentional processing. This research contributes to a better understanding of the role of individual differences and attentional processing in smoking behavior.
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Affiliation(s)
- D E Evans
- Tobacco Research and Intervention Program, Moffitt Cancer Center, Tampa, FL 33617, USA.
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130
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Kim YK, Chin JH, Kang SJ, Jun IG, Song JG, Jeong SM, Park JY, Hwang GS. Association between central venous pressure and blood loss during hepatic resection in 984 living donors. Acta Anaesthesiol Scand 2009; 53:601-6. [PMID: 19419353 DOI: 10.1111/j.1399-6576.2009.01920.x] [Citation(s) in RCA: 49] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
BACKGROUND Although low central venous pressure (CVP) anesthesia has been used to minimize blood loss during hepatectomy, the efficacy of this technique remains controversial. We therefore assessed the association between blood loss and CVP during hepatic resection, and examined significant determinants associated with intraoperative hemorrhage during hepatectomy in living donors. METHODS Between April 2004 and April 2008, 984 living donors who underwent a hepatic resection were assessed retrospectively. Univariate and multivariate analyses were performed to explore the relationships between intraoperative blood loss and several variables including CVP. RESULTS The mean intraoperative blood loss was 691.3 +/- 365.5 ml. Only four donors required packed red blood cell transfusions (mean, 1.5 U). The mean duration of hepatic resection was 92.1 +/- 26.3 min. The mean, maximum, and minimum values of CVP measured during hepatectomy were 4.6 +/- 1.7, 5.3 +/- 1.8, and 4.0 +/- 1.8 mmHg, respectively, and were not significantly correlated with intraoperative blood loss. On multivariate analysis, predictors of hemorrhage were liver fatty change, gender, and body weight, but none of the mean CVP, surgeons, anesthesiologists, anesthesia duration, resected liver volume, hepatectomy type, systolic blood pressure, heart rate, or body temperature were significant. CONCLUSIONS CVP during hepatic resection was not associated with intraoperative blood loss in living liver donors, suggesting that CVP may not be an important factor in predicting blood loss during hepatectomy in healthy subjects.
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Affiliation(s)
- Y K Kim
- Department of Anesthesiology and Pain Medicine, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea.
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131
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Yim V, Lee SY, Kim S, Park JY. Multipurpose DVD pick-up scanner for analysis of microfluidics and micromechanical structures. Annu Int Conf IEEE Eng Med Biol Soc 2009; 2008:2749-51. [PMID: 19163274 DOI: 10.1109/iembs.2008.4649771] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
Microfluidics has become increasingly prevalent and has founded widespread use in various applications such as biomedical applications (diagnostics, therapeutics, and cell/tissue engineering), inkjet head, and fuel cells etc. The issue of inspection and characterization of microfluidics has emerged as a major consideration in design, fabrication, and optical detection of devices. In this paper, we characterize the mixing flow pattern by diffusion, when two flows are combined in microchannel, using an optical scanner based on a DVD pick-up module, which is widely used in optical storage. Using Cy5.5 dye, we measure the fluorescent intensity that represents fluidic characteristics in Y-microchannel with 1 mum resolution and compare experimental results with computational fluid dynamics (CFD) simulation ones. Si based microstructures are measured using different optical reflective paths to the optical scanner with respect to the surface topologies. It is shown that the proposed optical scanner can be effectively and versatilely used to observe microfluidic characteristics and to measure the surface profiles of microstructures, being a cost-effective alternative device to conventional epifluorescent microscopes using high resolution CCD camera and interferometers.
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Affiliation(s)
- V Yim
- Mechanical Engineering Department, Sogang University, Mapo-gu, Seoul, Korea
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132
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Kim B, Park JY, Kim JY, Paik JK, Ordovas JM, Lee JH. The relationship of serum phospholipids fatty acid composition with metabolic syndrome and cardiovascular disease risk in Korean adults. FASEB J 2009. [DOI: 10.1096/fasebj.23.1_supplement.lb450] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Bumsik Kim
- Nutrition and GenomicsTufts universityBostonMA
- Institute of Science for Aging
| | - JY Park
- National Research Laboratory of Clinical Nutrigenetics/NutrigenomicsYonsei univ.SeoulRepublic of Korea
| | - JY Kim
- Institute of Science for Aging
| | - JK Paik
- National Research Laboratory of Clinical Nutrigenetics/NutrigenomicsYonsei univ.SeoulRepublic of Korea
| | - JM Ordovas
- Nutrition and GenomicsTufts universityBostonMA
| | - JH Lee
- Institute of Science for Aging
- National Research Laboratory of Clinical Nutrigenetics/NutrigenomicsYonsei univ.SeoulRepublic of Korea
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133
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Kim SK, Park JY, Koo BH, Lee JH, Kim HS, Choi WK, Shim I, Lee H, Hong MC, Shin MK, Min BI, Bae H. Adenoviral gene transfer of acetylcholinesterase T subunit in the hypothalamus potentiates electroacupuncture analgesia in rats. Genes Brain Behav 2008; 8:174-80. [PMID: 19077179 DOI: 10.1111/j.1601-183x.2008.00459.x] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
Our previous studies, using cDNA microarray and real-time reverse transcription-polymerase chain reaction, showed that acetylcholinesterase T subunit (AChET) gene was more abundantly expressed in the hypothalamus of the responder rats that were sensitive to electroacupuncture (EA) in the tail flick latency (TFL) test than in that of the non-responder rats that were insensitive to EA. In this study, we hypothesized that the expression of the AChET gene in the hypothalamus modulates EA analgesia in rats. To explore the hypothesis, we constructed an AChET-encoding adenovirus and a control virus expressing only green fluorescence protein, either of which was then injected into the hypothalamus of Sprague-Dawley rats. The hypothalamic activity of acetylcholinesterase was significantly higher in rats that were injected with the AChET virus than in rats that were injected with the control virus. The basal pain threshold measured by a TFL test was not changed by microinjection of AChET or control virus into the hypothalamus when EA treatment was not conducted. However, the analgesic effect of EA was significantly enhanced from 7 days after microinjection of the AChET virus into the hypothalamus but not after injection of the control virus. Furthermore, expression of the AChET in the hypothalamus did not affect body core temperature, body weight, motor function or learning and memory ability. Taken together, these results suggest that adenoviral expression of the AChET gene in the hypothalamus potentiates EA analgesia in rats without apparent side-effects.
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Affiliation(s)
- S K Kim
- College of Oriental Medicine, Kyung Hee University, Seoul, Korea
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Scott BL, Park JY, Deeg HJ, Marr KA, Boeckh M, Chauncey TR, Appelbaum FR, Storb R, Storer BE. Pretransplant neutropenia is associated with poor-risk cytogenetic features and increased infection-related mortality in patients with myelodysplastic syndromes. Biol Blood Marrow Transplant 2008; 14:799-806. [PMID: 18541200 DOI: 10.1016/j.bbmt.2008.04.011] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2008] [Accepted: 04/21/2008] [Indexed: 10/22/2022]
Abstract
A retrospective cohort analysis was performed to determine the impact of neutropenia on the outcome of hematopoietic cell transplantation (HSCT) in patients with myelodysplasia (MDS). Among 291 consecutive patients, 178 (61%) had absolute neutrophil counts (ANCs) <1500/microL and 113 (39%) had ANCs > or =1500/microL within 2 weeks before HSCT. Neutropenic patients more often had poor-risk karyotypes (34% versus 12%, P < .0001) and high-risk International Prognostic Scoring System scores (37% versus 18%, P = .0006). After HSCT, the rate of infections caused by Gram-positive bacteria and invasive fungal infections was significantly increased among neutropenic patients (rate ratio [RR] 1.77, P = .02 and RR = 2.56, P = .03, respectively), whereas infections caused by Gram-negative bacteria were not affected (RR 1.33, P = .53). The hazards of nonrelapse mortality (NRM) (hazard ratio [HR] = 1.62 [1.1-2.4], P = .01), overall mortality (HR = 1.55 [1.1-2.1], P = 0.007), and infection-related mortality (HR = 2.22 [1.2-4.2], P = .01) were increased in neutropenic patients, whereas relapse, engraftment, and graft-versus-host-disease were not affected. After adjusting for cytogenetic risk and marrow myeloblast percentages, neutropenic patients remained at significant hazard for infection-related mortality (HR = 1.94 [1.0-3.8], P = .05), but not for overall mortality or NRM. We propose that intensified strategies to prevent infections should be implemented in MDS patients with preexisting neutropenia who undergo HSCT.
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Affiliation(s)
- Bart L Scott
- Fred Hutchinson Cancer Research Center, Seattle, Washington 98109-1024, USA.
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135
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Park JY, Park YN, Kim DY, Paik YH, Lee KS, Moon BS, Han KH, Chon CY, Ahn SH. High prevalence of significant histology in asymptomatic chronic hepatitis B patients with genotype C and high serum HBV DNA levels. J Viral Hepat 2008; 15:615-21. [PMID: 18573162 DOI: 10.1111/j.1365-2893.2008.00989.x] [Citation(s) in RCA: 67] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Current treatment guidelines suggest that antiviral therapy be considered for chronic hepatitis B (CHB) patients with high viral load if a biopsy shows significant liver disease despite alanine aminotransferase (ALT) levels two times or less than the upper limit of normal (ULN). We evaluated the histological findings in CHB patients with high viral load and persistently normal or slightly elevated serum ALT levels. Between January 2003 and June 2006, 105 consecutive treatment-naive patients with CHB who underwent ultrasonography-guided percutaneous liver biopsy, had detectable serum HBV DNA (>10(5) copies/mL) in a direct hybridization assay and normal or slightly elevated serum ALT levels (≤2 × ULN) for at least 12 months were included in a prospective study. Histological assessment was based on the METAVIR scoring system. Significant histology was defined as fibrosis stage ≥F2 or necroinflammation grade ≥A2. Among the 105 CHB patients with high viral load and persistently normal or slightly elevated serum ALT levels for at least 12 months, significant fibrosis (F2-F4 fibrosis) was observed in 63 patients (60.0%) and the actual significant histology was found in 65 patients (61.9%). On multivariate analysis, serum ALT levels and age at which they entered the study were independent factors associated with significant histology. Odds ratios for significant histology increased progressively according to serum ALT levels and age. In conclusion, a large proportion of CHB patients with genotype C, high viral load and ALT ≤2 × ULN had significant liver disease on liver biopsy and should be considered for antiviral therapy.
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Affiliation(s)
- J Y Park
- Department of Internal Medicine, Yonsei University College of Medicine, Seoul, Korea
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136
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An DJ, Song DS, Park JY, Park BK. A DNA miniarray system for simultaneous visual detection of porcine circovirus type 1 (PCV1) and 2 (PCV2) in pigs. Vet Res Commun 2008; 33:139-47. [PMID: 18651234 PMCID: PMC7088660 DOI: 10.1007/s11259-008-9080-8] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 07/03/2008] [Indexed: 11/30/2022]
Abstract
A miniarray system was developed for the simultaneous detection of porcine circovirus type 1 (PCV1) and type 2 (PCV2) in pigs. The system consists of a polymerase chain reaction (PCR) step to amplify target viral DNA, followed by detection of the amplified DNA using a membrane-anchored probe array and an avidin-alkaline phosphatase (Av-AP) indicator system. The lower limit of detection of PCV using the miniarray was 101.9 tissue culture infectious dose 50 (TCID50)/ml and 102.08TCID50/ml for PCV1 and PCV2, respectively, and 100 viral copies/μl for both PCV1 and PCV2. We validated the miniarray system using 141 lymph node specimens from pigs with suspected postweaning multisystemic wasting syndrome or porcine dermatitis and nephropathy syndrome. Of the 141 samples evaluated, 55 were identified as positive for PCV by the miniarray. Relative to in situ hybridization, the sensitivity and specificity of the miniarray was 100% and 98.9%, respectively. In contrast to other microarray systems, the miniarray does not require a DNA chip reader, since the results can be determined by visual inspection of colorized spots on a nylon membrane. This system represents an effective alternative method for the differential detection of PCV1 and PCV2 in pigs, as well as the maintenance of PCV-free cell lines and pre-screening of commercial vaccines for possible contamination.
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Affiliation(s)
- D J An
- National Veterinary Research and Quarantine Service, Anyang, Kyunggi-Do, Korea
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137
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Kim JY, Park H, Kwon KH, Park JY, Baek JY, Lee TS, Song HR, Park YD, Lee SH. A cell culturing system that integrates the cell loading function on a single platform and evaluation of the pulsatile pumping effect on cells. Biomed Microdevices 2008; 10:11-20. [PMID: 17624619 DOI: 10.1007/s10544-007-9105-z] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
In this paper, we present a novel microfluidic system with pulsatile cell storing, cell-delivering and cell culturing functions on a single PDMS platform. For this purpose, we have integrated two reservoirs, a pulsatile pumping system containing two soft check valves, which were fabricated by in situ photopolymerization, six switch valves, and three cell culture chambers all developed through a simple and rapid fabrication process. The sample volume delivered per stroke was 120 nl and the transported volume was linearly related to the pumping frequency. We have investigated the effect of the pulsatile pneumatic micropumping on the cells during transport. For this purpose, we pumped two types of cell suspensions, one containing human breast adenocarcinoma cells (MCF-7) and the other mesenchymal stem cells (hMSCs) derived from bone marrow. The effect of pulsatile pumping on both cell types was examined by short and long-term culture experiments. Our results showed that the characteristics of both cells were maintained; they were not damaged by the pumping system. Evaluations were carried out by morphological inspection, viability assay and immunophenotyping analysis. The delivered MCF-7 cells and hMSCs spread and proliferated onto the gelatin coated cell culture chamber. This total micro cell culture system can be applied to cell-based high throughput screening and for co-culture of different cells with different volume.
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Affiliation(s)
- J Y Kim
- Department of Biomedical Engineering, Korea University, Anam-dong, Seongbuk-gu, Seoul 136-701, South Korea
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Kim KM, Park SH, Kim JS, Lee WK, Cha SI, Kim CH, Kang YM, Jung TH, Kim IS, Park JY. Polymorphisms in the type IV collagen alpha3 gene and the risk of COPD. Eur Respir J 2008; 32:35-41. [PMID: 18385178 DOI: 10.1183/09031936.00076207] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
A number of genome-wide linkage analyses have identified the 2q33.3-2q37.2 region as the most likely to contain the genes that contribute to the susceptibility to chronic obstructive pulmonary disease (COPD). It was hypothesised that the type IV collagen alpha3 (COL4A3) gene, which is one of the genes located in the 2q33.3-2q37.2 region, may act as a low-penetrance susceptibility gene for COPD. To test this hypothesis, the association of COL4A3 -1162T>C, IVS2+12C>A, P141L, G162E, H451R, P574L and *315C>A polymorphisms with the risk of COPD was investigated in a case-control study of 311 COPD patients and 386 controls. The presence of at least one 451R allele was associated with a significantly higher risk of COPD compared with the 451 H/H genotype (adjusted odds ratio 1.48, 95% confidence interval (1.03-2.14)). When the subjects were stratified according to age and COPD severity, the 451R allele was associated with a significantly higher risk of COPD only in younger individuals with severe COPD (3.02 (1.37-6.67)). In conclusion, these findings suggest that the type IV collagen alpha3 gene contributes to the genetic susceptibility to chronic obstructive pulmonary disease.
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Affiliation(s)
- K M Kim
- Dept of Biochemistry, Kyungpook National University Hospital, Samduk 2a 50, Daegu, 700-412, Republic of Korea
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139
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Park JY, Park SJ, Choi SU, Shin HW, Lee HW, Lim HJ, Yoon SM, Chang SH. Target-controlled propofol infusion for sedation in patients undergoing transrectal ultrasound-guided prostate biopsy. J Int Med Res 2008; 35:773-80. [PMID: 18034990 DOI: 10.1177/147323000703500605] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
The efficacy and safety of the routine use of target-controlled infusion of propofol for the sedation of patients undergoing transrectal ultrasound-guided prostate biopsy were assessed. The optimal level of sedation was also evaluated. A total of 250 patients were randomized into five groups according to sedation level determined by the Observer's Assessment of Alertness/Sedation (OAA/S) scale. As the level of sedation was increased, the overall pain and discomfort score decreased and the satisfaction rate tended to increase, although hypoxia meant that intervention occurred more frequently at higher sedation levels. Target-controlled infusion of propofol provided safe and effective sedation during transrectal ultrasound-guided prostate biopsy, particularly if moderate sedation (OAA/S score of 3) was achieved. The effect-site concentration of propofol for this level of sedation was about 1.5 microg/ml.
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Affiliation(s)
- J Y Park
- Department of Anaesthesiology and Pain Medicine, Korea University Anam Hospital, Seoul, Korea
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140
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Fang L, Park JY, Ma H, Jen AKY, Salmeron M. Atomic force microcopy study of the mechanical and electrical properties of monolayer films of molecules with aromatic end groups. Langmuir 2007; 23:11522-11525. [PMID: 17924672 DOI: 10.1021/la701489p] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
The effect of intermolecular pi-pi stacking on the electrical and mechanical properties of monolayer film molecules containing aromatic groups was studied using atomic force microscopy. Two types of aromatic molecules, (4-mercaptophenyl) anthrylacetylene (MPAA) and (4-mercaptophenyl)-phenylacetylene (MPPA), were used as model systems with different pi-pi stacking strength. Monolayer films of these molecules on Au(111) surfaces exhibited conductivities differing by more than 1 order of magnitude, with MPAA being the most conductive and MPPA being the least conductive. The response to compressive loads by the AFM tip was also found to be very different for both molecules. In MPAA films, distinct molecular conductivity changes are observed upon mechanical perturbation. This effect, however, was not observed on the MPPA film, where intermolecular pi-pi interactions are likely weaker.
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Affiliation(s)
- Liang Fang
- Molecular Foundry, Materials Science Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
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141
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Chin DK, Park JY, Yoon YS, Kuh SU, Jin BH, Kim KS, Cho YE. Prevalence of osteoporosis in patients requiring spine surgery: incidence and significance of osteoporosis in spine disease. Osteoporos Int 2007; 18:1219-24. [PMID: 17387420 DOI: 10.1007/s00198-007-0370-8] [Citation(s) in RCA: 160] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/22/2006] [Accepted: 02/27/2007] [Indexed: 10/23/2022]
Abstract
UNLABELLED The purpose of this study is to evaluate the incidence of osteoporosis in patients requiring spine surgery. Among patients older than 50 years, the rate of osteoporosis in males was 14.5% and the rate osteoporosis in females was 51.3%. We strongly recommend an evaluation and treatment for osteoporosis in the patients requiring spine surgery, especially in females over 50 years old. INTRODUCTION Because lifespan is increasing, there is an increase in the incidence of osteoporosis in elderly spine surgery patients. The osteoporosis may adversely influence the fusion rate and the surgical outcome. The purpose of this study is to evaluate the incidence of osteoporosis in patients requiring spine surgery. METHODS A total of 1,321 patients underwent spine surgeries at our institute from January 1, 2005 to December 31, 2005. Among them, there were 562 patients (42.5%) younger than 50 years old, and 759 patients (57.6%) older than 50 years old. Prior to operation, we evaluated the patients for osteoporosis on both the femur head and lumbar spine by measuring the bone mineral density (BMD) by the dual-energy X-ray absorptiometry (DXA). Based on the World Health Organization (WHO) criteria for osteoporosis, we chose the T-score to determine normal (>-1), osteopenia (-1>or=, >-2.5), and osteoporosis (<or=-2.5). Among the 562 patients younger than 50 years, DXA was performed in 22 (3.9%) patients and there were 13 (2.3%) cases of osteopenia and 2 (0.3%) cases of osteoporosis. RESULTS Among 759 patients older than 50 years, DXA was performed on 516 (68.0%) patients, 193 males and 323 females. Among the male patients, there were 89 (46.1%) patients with osteopenia and 28 (14.5%) with osteoporosis. Among the female patients, there were 134 (41.4%) with osteopenia and 166 (51.3%) with osteoporosis. The incidence of osteoporosis was higher in female patients and significantly increased with increasing age. Among 759 patients older than 50 years, 676 patients underwent a major spine operation with or without fusion. Among these patients, DXA was performed in 446 (66.0%) patients and there were 207 (46.4%) patients with osteopenia and 139 (31.1%) with osteoporosis. CONCLUSIONS The patients over 50 year-old who need spine operation have osteoporosis often. In conclusion, the number of spine operations in elderly patients is increasing and the incidence of osteoporosis in spine surgery patients is also increasing. We strongly recommend an evaluation for osteoporosis and post-operative treatment for osteoporosis in patients over 50 years old, especially for female patients.
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Affiliation(s)
- D K Chin
- Department of Neurosurgery,Yongdong Severance Spine Hospital, Yonsei University College of Medicine, 146-92, Dogok-dong, Kangnam-gu, Seoul, 135-720, South Korea
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142
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Ozawa Y, Makino S, Park JY, Chang JH, Kim JH, An SH. A review of recent unexpected animal disease events in Japan and Korea and the follow-up action taken. REV SCI TECH OIE 2007; 25:125-35. [PMID: 16796042 DOI: 10.20506/rst.25.1.1649] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
In Japan, the need to improve countermeasures against biological weapons was recognised after the Aum Shinrikyo cult attempted to use biological weapons in 1995. This paper describes how the two relevant ministries in Japan worked together to cope with recent disease outbreaks, including cases of classical swine fever (CSF) and avian influenza, which evidence suggests might have been the result of the deliberate misuse of unauthorised vaccines that had been illegally imported. By implementing successful control measures the two ministries were able to eradicate all the diseases within very short periods. In the past few years, the Republic of Korea has also experienced outbreaks of foot and mouth disease, highly pathogenic avian influenza, and CSF, all of which had previously been absent (or had been eradicated) in Korea. A review of the historical background, major events of the outbreaks and the control measures which were implemented are presented here.
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Affiliation(s)
- Y Ozawa
- OIE, 2-30-3 Utsukushigaoka, Aoba-ku, Yokohama 225-0002, Japan
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143
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Park J, Park JY, Kim SH, Lim DJ, Kim SD, Chung HS. Long term results from percutaneous radiofrequency neurotomy on posterior primary ramus in patients with chronic low back pain. Acta Neurochir Suppl 2007; 99:81-3. [PMID: 17370770 DOI: 10.1007/978-3-211-35205-2_16] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/14/2023]
Abstract
PURPOSE We report on our experience of percutaneous radiofrequency neurotomy (PRN) on the posterior primary ramus (PPR) with at least two years follow-up. METHODS 228 patients underwent PRN on the PPR for refractory low back pain. 128 patients met the inclusion criteria of facetal originated pain (group II), while 100 patients did not (group I). Radiofrequency (RF) procedures were applied in the usual manner. Pain relief was assessed at 1 week, 1 month, 6 months and 2 years using visual analog scale (VAS). FINDINGS Positive responders were 56% at 1 week, 46% at 1 month, 18% at 6 months, and 13% at 2 years after PRN in group I, and 78.9% at 1 week, 75.4% at 1 month, 62.5% at 6 months, and 54.7% at 2 years in group II. Prominent local tenderness, percussion tenderness, pain on getting up, extension and transitional movement, radiating pain on buttock and/or posterior thigh, and good immediate response were found to be significantly related to good outcome. CONCLUSION PRN on the PPR has long-term beneficial effects. Long-term good results can be achieved after proper selection of patients with facet joint related low back pain.
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Affiliation(s)
- J Park
- Department of Neurosurgery, Korea University Ansan Hospital, Korea University School of Medicine, Ansan, Korea
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Kim JG, Sohn SK, Chae YS, Cho YY, Bae HI, Yan G, Park JY, Lee MH, Chung HY, Yu W. Vascular endothelial growth factor gene polymorphisms associated with prognosis for patients with gastric cancer. Ann Oncol 2007; 18:1030-6. [PMID: 17426061 DOI: 10.1093/annonc/mdm085] [Citation(s) in RCA: 62] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
BACKGROUND The present study analyzed vascular endothelial growth factor (VEGF) gene polymorphisms and their impact on the prognosis for patients with gastric cancer. PATIENTS AND METHODS Five hundred and three consecutive patients with surgically resected gastric adenocarcinoma were enrolled in the present study. The genomic DNA was extracted from paraffin-embedded tissue and four VEGF (-460T > C, -116G > A, +405G > C, and +936C > T) gene polymorphisms were determined using a polymerase chain reaction-restriction fragment length polymorphism assay. RESULTS The survival analysis showed no association of three VEGF gene polymorphisms with the prognosis. For the +936C > T polymorphism, the T/T genotype, however, had a worse overall survival (OS) compared with the C/C genotype (P = 0.037). The -460 T/C or C/C genotype was a poor prognostic factor in patients with stage 0 or I gastric cancer (OS: hazard ratio (HR) = 3.96, disease-free survival (DFS): HR = 4.87). In the haplotype analysis, the CACC haplotype was associated with a significantly worse survival when compared with the TGGC haplotype (OS: HR = 1.72, DFS: HR = 1.73). CONCLUSIONS VEGF gene polymorphisms were found to be an independent prognostic marker for patients with gastric cancer. Consequently, the analysis of VEGF gene polymorphisms can help identify patient subgroups at high risk of a poor disease outcome.
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Affiliation(s)
- J G Kim
- Department of Oncology/Hematology, Kyungpook National University Hospital, Kyungpook National University School of Medicine, Daegu, Korea.
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Park JY, Kim SD, Park J, Lim DJ, Lee HK, Chung HS. A new and simple transection knife for study of neurodegeneration and neuroregeneration in animal model. Acta Neurochir Suppl 2007; 99:145-50. [PMID: 17370782 DOI: 10.1007/978-3-211-35205-2_28] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
BACKGROUND The purpose of this study was to design and make a simple, inexpensive brain knife that could produce consistent results following transection in animal model. MATERIALS AND METHODS After testing various materials including commercially available products, microelectrode recording needles as used in deep brain stimulation (DBS) surgery were selected as ideal candidates. They were modified to serve as type of wire-knife for the purposes of study. For this study, the major pathway for dopaminergic neuron from substantia nigra to striatum was selected for transection. A total of 40 Sprague-Dawley rats were assigned to 8 groups; normal, 1-4, 6, 8, and 10 weeks post-transection. Degree of cell death was determined and surviving neurons were counted by means of fluorescent microscopic examination, immunohistochemistry involving tyrosine hydroxylase (TH)-immunoreactive staining, and mapping to verify complete transection. RESULTS Compared to control, percentage of remaining neurons in each group was 61.3, 36.8, 29.9, 5.1, 5.9, 7.0%, respectively. Completeness of lesion was correlated with the absence of TH-immunoreactivity in the striatum. CONCLUSION Our model seems to provide complete cell death in early period after transection with consistent results. Thus, this type of brain knife can be very handy, without any extra cost, in any research model involving transection of fiber bundle for studies on neurodegeneration and neuroregeneration.
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Affiliation(s)
- J Y Park
- Department of Neurosurgery, Korea University Medical Center, Ansan Hospital, Seoul, Korea.
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Park JY, Park CY, Min BG. A numerical study on the effect of side hole number and arrangement in venous cannulae. J Biomech 2007; 40:1153-7. [PMID: 16764882 DOI: 10.1016/j.jbiomech.2006.04.005] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2005] [Accepted: 04/05/2006] [Indexed: 10/24/2022]
Abstract
Insertion of cannulae into vessels may apply non-physiological load and stress on blood cells, such that adenosine diphosphate may increase and result in hemolysis. Authors used the computational method to simulate the blood flow inside of the cannula. We limited the research to within the drainage cannulae. Nine different cannulae categorized by the number of side holes of 4, 12, and 20, and also categorized by the array type as staggered array, in-line array, and alternative in-line array were studied and compared to the cannulae with no side holes by using computational fluid dynamics. We evaluated the flow rate, the wall shear stress, and the shear rate, and compared them with one another to estimate the effect of the side holes. The flow rate is not proportional to the number of the side holes. However, larger number of side holes can reduce the mean shear rate.
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Affiliation(s)
- J Y Park
- Interdisciplinary Program in Biomedical Engineering Major, Seoul National University, 28 Yeongeon-dong, Jongno-gu, Seoul 110-799, Republic of Korea
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147
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Park JY, Kim KA, Park PW, Lee OJ, Kim JS, Lee GH, Ha MC, Park JH, O MJ, Ryu JH. Comparative pharmacokinetic and pharmacodynamic characteristics of amlodipine besylate and amlodipine nicotinate in healthy subjects. Int J Clin Pharmacol Ther 2006; 44:641-7. [PMID: 17190374 DOI: 10.5414/cpp44641] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
BACKGROUND AND AIM Amlodipine, a dihydropyridine calcium antagonist, is prescribed for the management of angina and hypertension, and is sold as amlodipine besylate. However, a new salt formulation, amlodipine nicotinate, has recently been developed. Here, we evaluated the comparative pharmacokinetic and pharmacodynamic characteristics of the nicotinate and besylate forms of amlodipine. SUBJECTS AND METHODS A randomized, 2-way crossover study was conducted in 18 healthy male volunteers to compare the pharmacokinetics and pharmacodynamics of these two forms, i.e. amlodipine nicotinate (test) and amlodipine besylate (reference), after administration of a single dose of 5 mg of each drug and a washout period between doses of 4 weeks. Blood samples for the pharmacokinetic analysis of amlodipine were obtained over the 144-hour period after administration. Systolic and diastolic blood pressures and pulse rates were recorded immediately prior to each blood sampling. RESULTS All participants completed both treatment periods, and no serious adverse events occurred during the study period. After administering a single dose of each formulation, mean AUC0-infinity and Cmax values were 190.91+/-60.49 ng x h/ml and 3.87+/-1.04 ng/ml for the test formulation and 203.15+/-52.05 ng x h/ml and 4.01+/-0.60 ng/ml for the reference formulation, respectively. The 90% confidence intervals of test/reference mean ratios for AUC0- infinity and Cmax fell within the predetermined equivalence range of 80 - 125%. Pharmacodynamic profiles including systolic and diastolic blood pressures and pulse rates exhibited no significant differences between the two formulations. CONCLUSION The two amlodipine formulations showed similar pharmacokinetic and pharmacodynamic characteristics and the new amlodipine formulation, amlodipine nicotinate, was found to be equivalent for pharmacokinetics to the currently available amlodipine besylate with respect to the rate and extent of amlodipine absorption.
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Affiliation(s)
- J Y Park
- Department of Clinical Pharmacology and Toxicology, Anam Hospital, Korea University College of Medicine, Seoul.
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148
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Cho WH, Choi CH, Park JY, Kang SK, Kim YK. 15-Deoxy-Δ12,14-prostaglandin J2 (15d-PGJ2) Induces Cell Death Through Caspase-independent Mechanism in A172 Human Glioma Cells. Neurochem Res 2006; 31:1247-54. [PMID: 17006759 DOI: 10.1007/s11064-006-9157-0] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
15-Deoxy-(Delta12,14)-prostaglandin J(2) (15d-PGJ(2)) is a naturally occurring cyclopentenone metabolite of prostaglandin D(2) (PGD(2)) and is known as a specific potent ligand for the peroxisome proliferators activator receptor-gamma (PPARgamma). 15d-PGJ(2) inhibits cell growth and induces apoptosis in a number of different cancer cells. However, the underlying mechanism by which 15d-PGJ(2) induces cell death remains to be defined. The present study was undertaken to determine the effect of 15d-PGJ(2) on cell death in A172 human glioma cells. 15d-PGJ(2) caused reactive oxygen species (ROS) generation. 15d-PGJ(2)-induced ROS production and cell death were prevented by the antioxidant N-acetylcysteine. Activation of mitogen-activated protein kinases (MAPK) was not observed in cells treated with 15d-PGJ(2 )and inhibitors of MAPK subfamilies also were not effective in preventing 15d-PGJ(2)-induced cell death. 15d-PGJ(2) treatment caused mitochondrial dysfunction, as evidenced by depolarization of mitochondrial membrane potential. 15d-PGJ(2) induced caspase activation at 24 h of treatment, but the 15d-PGJ(2)-induced cell death was not prevented by caspase inhibitors. The antiapoptotic protein XIAP levels and release of apoptosis inducing factor (AIF) into the cytosol were not altered by 15d-PGJ(2) treatment. Taken together, these findings indicate that 15d-PGJ(2) triggers cell death through a caspase-independent mechanism and ROS production and disruption of mitochondrial membrane potential play an important role in the 15d-PGJ(2)-induced cell death in A172 human glioma cells.
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Affiliation(s)
- W H Cho
- Department of Neurosurgery, College of Medicine, Pusan National University, Pusan, 602-739, Korea
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149
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Park JY, Gavrilova O, Gorden P. The clinical utility of leptin therapy in metabolic dysfunction. MINERVA ENDOCRINOL 2006; 31:125-31. [PMID: 16682936] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/09/2023]
Abstract
Obesity and diabetes are major public health threats worldwide. Insulin resistance appears to be a significant factor in this global epidemic. In this present review, we have focused on a human model of insulin resistance which embodies many of the metabolic abnormalities that are associated with the morbidity of diabetes and obesity. Lipodystrophy in rodents and humans is a severe model of insulin resistance, and we use a novel therapeutic approach with the administration of the newly discovered leptin to ameliorate many of these metabolic abnormalities. The ability to study the administration of leptin in this setting of severe insulin resistance allows us perform a coveted look into a human condition where metabolic dysfunction can be reversed or controlled.
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Affiliation(s)
- J Y Park
- National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda, MD, USA
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150
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Hur M, Park JY, Cho HC, Lee KM, Shin HY, Cho HI. Methylenetetrahydrofolate reductase A1298C genotypes are associated with the risks of acute lymphoblastic leukaemia and chronic myelogenous leukaemia in the Korean population. ACTA ACUST UNITED AC 2006; 28:154-9. [PMID: 16706930 DOI: 10.1111/j.1365-2257.2006.00769.x] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Methylenetetrahydrofolate reductase (MTHFR) is a key enzyme involved in folate metabolism, DNA methylation and synthesis. We investigated the association between MTHFR polymorphisms and the risks of acute and chronic leukaemias. MTHFR C677T and A1298C were genotyped in 396 Korean individuals using multiplex polymerase chain reaction/restriction fragment-length polymorphism. They were acute lymphoblastic leukaemia (ALL, n = 89), acute myeloid leukaemia (AML, n = 55), biphenotypic acute leukaemia (n = 12), chronic myelogenous leukaemia (CML, n = 40), and normal controls (n = 200). C677T genotypes were not associated with the risk of each disease. A1298C variants, however, significantly decreased the risks of ALL and CML compared with 1298AA. Odds ratios and 95% confidence intervals of 1298AC and 1298AC + CC were 0.53 (0.31-0.93) and 0.54 (0.31-0.93) in ALL, and 0.34 (0.14-0.80) and 0.40 (0.18-0.89) in CML, respectively, compared with 1298AA. These findings demonstrate that the development of ALL and CML is more dependent on folate status, and more susceptible to DNA instability than that of AML. In addition, A1298C rather than C677T may be a more important genetic risk modifier in leukaemogenesis at least in the Korean population.
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MESH Headings
- Adolescent
- Adult
- Aged
- Aged, 80 and over
- Child
- Child, Preschool
- Confidence Intervals
- Female
- Folic Acid/metabolism
- Gene Frequency/physiology
- Humans
- Infant
- Korea
- Leukemia, Myelogenous, Chronic, BCR-ABL Positive/enzymology
- Leukemia, Myelogenous, Chronic, BCR-ABL Positive/genetics
- Leukemia, Myeloid, Acute/enzymology
- Leukemia, Myeloid, Acute/genetics
- Male
- Methylenetetrahydrofolate Reductase (NADPH2)/genetics
- Middle Aged
- Polymorphism, Genetic/genetics
- Precursor Cell Lymphoblastic Leukemia-Lymphoma/enzymology
- Precursor Cell Lymphoblastic Leukemia-Lymphoma/genetics
- Retrospective Studies
- Risk Assessment
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Affiliation(s)
- M Hur
- Department of Laboratory Medicine, Hallym University College of Medicine, Seoul, Korea
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