No abstract available.
Head* ; Neck* ; Neurilemmoma*

No abstract available.
Humans ; Pregnancy* ; Purpura, Thrombotic Thrombocytopenic* ; Siblings* ; Twins, Monozygotic*

This study was conducted to define the underlying mechanism of hypophagia induced by increased central serotonergic action. Rats received 3 daily injections of 5-hydroxy-L-tryptophan (5-HTP), a serotonin precursor, at a dose of 100 mg/kg/10 ml saline at 1 h before lights off. A significant suppression in food intake was observed shortly after the 5-HTP injection and persisted during 3 daily 5-HTP injections. Neuropeptide Y (NPY) expression in the arcuate nucleus increased after 3 days of 5-HTP treatment, as high as in the pair-fed group. Immunoreactivity of phosphorylated extracellular signal-regulated protein kinase (pERK1/2) in the hypothalamic paraventricular nucleus (PVN) was increased markedly by 3 days of 5-HTP treatment, but not by 3 days of pair-fed. mRNA expression levels of serotonin reuptake transporter (5-HTT) was increased in the dorsal raphe nucleus of the 5-HTP treated rats, but not in the pair-fed group. Results suggest that increased pERK1/2 in the PVN of 5-HTP injected rats may be a part of serotonergic anorectic signaling, perhaps blunting the orectic action of NPY; i.e., 5-HTP injected rats showed hypophagia despite of increased NPY expression in the arcuate nucleus.
5-Hydroxytryptophan ; Animals ; Arcuate Nucleus ; Eating ; Hypothalamus ; Light ; Neuropeptide Y ; Paraventricular Hypothalamic Nucleus ; Protein Kinases ; Raphe Nuclei ; Rats ; RNA, Messenger ; Serotonin

No abstract available.
Lithotripsy* ; Shock* ; Ureter*

BACKGROUND: Lifestyle is an important risk factor for many diseases. We need to educate medical students for advocating health promoting behaviors to their patients. Teaching knowledge, however, was not enough for medical students to change their health-related lifestyle. In this study, we investigated health promoting behaviors of medical students, and the improvement of their health behaviors after competitive lifestyle modification program. METHODS: All sophomores of medical college in Seoul National University were included in this study. We performed lifestyle modification program consisting of lecture, group competition, and feedback. We focused on reforming health behaviors like smoking, drinking, exercise, stress management and eating habits. And we also checked common symptoms of functional diseases, medication frequency for relieving these symptoms and general life satisfaction. RESULTS: After 2 months of lifestyle modification program, the obese (P = 0.0455) and the average value of BMI (P < 0.001) were decreased and two of smokers quitted smoking. Numbers of medical students with health related habits such as regular exerciser (P = 0.027), frequent user of symptom-relief medication (P < 0.001), breakfast skipper (P = 0.005) were signifi cantly changed in positive way, and the average value of general life satisfaction score (P = 0.003) was improved. CONCLUSION: Lifestyle modification program improved medical students' health habits and enhanced general life satisfaction.
Breakfast ; Drinking ; Eating ; Health Behavior ; Humans ; Life Style ; Risk Factors ; Smoke ; Smoking ; Students, Medical

Objective: The rate of dropouts by emergency residents is relatively high in Korea, which causes harm to both medicalinstitutions and individuals. This study investigated the dropouts in emergency residents to identify the related factors. Methods: In this retrospective study, data were collected through in-depth individual interviews by telephone after thefirst interview by e-mail for residents who dropped out of emergency medicine training, and thematic analysis was conducted. Results: Three themes were identified from nine subthemes: ‘Overload,’ ‘Disposition dilemma,’ and ‘Occurrence of negativefeeling.’ Conclusion The core themes of dropout in emergency residents are complex, leading to skepticism about emergencymedicine training and a loss of self-esteem as an emergency medicine doctor. Therefore, the guidance specialist shouldexamine the appropriateness of the job of the resident to prevent the dropout in emergency medicine departments, recognizethe ambiguous patient dilemma as a problem of the emergency system, and watch for negative emotions of theresidents.

Background: This study aimed to evaluate the diagnostic performance of the STANDARD F Influenza A/B FIA test (SD Biosensor Inc., Korea) for the rapid detection of influenza A virus in comparison with the Sofia Influenza A+B FIA (Quidel Corp., USA) and SD BIOLINE Influenza Ag A/B/A(H1N1) (Standard Diagnostic, Inc., Korea) tests. Methods: A total of 227 non-duplicated nasopharyngeal aspirates submitted for real-time RT-PCR analysis were included in the study. We used the three commercial tests in remnant samples from routine assays, according to the manufacturer’s instructions. We analyzed the diagnostic performance, including sensitivity and specificity, of the three tests. Results: Real-time RT-PCR analysis showed that 67 (29.5%) samples were positive and 160 (70.5%) were negative for influenza A virus, and that all the specimens were negative for influenza B. The overall sensitivity and specificity for influenza A virus detection were 50.7% and 100% for the STANDARD F, 50.7% and 100% for the Sofia, and 29.9% and 100% for the SD BIOLINE tests, respectively. The STANDARD F and SD BIOLINE tests showed negative results for influenza B virus in all specimens, whereas the Sofia test showed two false-positive results. Conclusion The STANDARD F Influenza A/B test showed a good diagnostic performance and may be useful for the rapid diagnosis of influenza A.

BACKGROUNDS: Standardization of nucleic acid amplification techniques (NAT) which can be achieved by the use of standard to validate reproducibility and sensitivity in each assay run is necessary before the introduction of such methods for routine screening of blood and blood products for viral contaminants. The objective of this study was to analyze the serological and genotypic characteristics of HCV positive plasmas and to manufacture the HCV RNA national standard candidate. METHODS: We obtained three plasmas from Blood Transfusion Research Institute, Korea, with highly positive HCV RNA plasmas (#37, #40, #46) and with normal plasma for dilution. All the plasmas were confirmed by enzyme immunoassay (EIA) test for anti-HIV, HBsAg, anti-HCV and by polymerase chain reaction(PCR) for HBV DNA, HIV RNA, HCV RNA. The genotypes of those were confirmed by INNO-LiPA HCV II. HCV RNA national standard candidate was manufactured by dispensing the diluted plasma into about 2,000 vials. Each vial was rapidly frozen using liquid nitrogen and was kept in refrigerator at -70 degrees C. RESULTS: All plasmas were identified as anti-HIV, HBsAg, HBV DNA, and HIV RNA negative plasmas. The genotypes of those were confirmed as 1b for #37, 1b or 2 for #40 and 2a or 2c for #46, respectively. Sample #37 was selected as the candidate material. After manufacturing, we obtained 1,944 vials for the candidate. CONCLUSION: In this study, we analyzed HCV positive plasmas and manufactured the HCV RNA national standard candidate. In near future, this material would be established for national standard to increase in the safety of blood and blood products in Korea.
Academies and Institutes ; Blood Transfusion ; DNA ; Genotype ; Hepacivirus ; Hepatitis B Surface Antigens ; HIV ; Immunoenzyme Techniques ; Korea ; Mass Screening ; Nitrogen ; Nucleic Acid Amplification Techniques ; Plasma* ; RNA*

BACKGROUND: It is a trend that the average life span is prolonged in proportion to the advance of socio-economy and medical science. Consequently, the number of elderly patients with skin diseases is increasing. OBJECTIVE: This study was performed to see the change of patterns of skin diseases in elderly patients. METHODS: One thousand four hundred and twenty elderly patients, over the age of 65, who visited the departments of dermatology and in five hospitals, from January 1, 1997 to December 31, 1997 were selected. We surveyed the frequeney of skin disease by types and the distributions by month, season and age.
Aged* ; Dermatology ; Epidemiologic Studies ; Humans ; Seasons ; Skin Diseases* ; Skin*

Stem cells can give rise to various cell types and are capable of regenerating themselves over multiple cell divisions. Pluripotency and self-renewal potential of stem cells have drawn vast interest from different disciplines, with studies on the molecular properties of stem cells being one example. Current investigations on the molecular basis of stem cells pluripotency and self-renewal entail traditional techniques from chemistry and molecular biology. In this mini review, we discuss progress in stem cell research that employs proteomics approaches. Specifically, we focus on studies on human stem cells from proteomics perspective. To our best knowledge, only the following types of human stem cells have been examined via proteomics analysis: human neuronal stem cells, human mesenchymal stem cells, and human embryonic stem cells. Protein expression serves as biomarkers of stem cells and identification and expression level of such biomarkers are usually determined using two-dimensional electrophoresis coupled mass spectrometry or non-gel based mass spectrometry.
*Electrophoresis, Gel, Two-Dimensional ; Genetic Techniques ; Humans ; Mass Spectrometry/*methods ; Neurons/*cytology/physiology ; Proteomics/*methods ; Stem Cells/*metabolism