BACKGROUND: Isocitrate dehydrogenase (IDH) catalyzes the oxidative decarboxylation of isocitrate to yield alpha-ketoglutarate (alpha-KG) with production of reduced nicotinamide adenine dinucleotide (NADH). Dysfunctional IDH leads to reduced production of alpha-KG and NADH and increased production of 2-hydroxyglutarate, an oncometabolite. This results in increased oxidative damage and stabilization of hypoxia-inducible factor alpha, causing cells to be prone to tumorigenesis. METHODS: This study investigated IDH mutations in 61 Ewing sarcoma family tumors (ESFTs), using a pentose nucleic acid clamping method and direct sequencing. RESULTS: We identified four cases of ESFTs harboring IDH mutations. The number of IDH1 and IDH2 mutations was equal and the subtype of IDH mutations was variable. Clinicopathologic analysis according to IDH mutation status did not reveal significant results. CONCLUSIONS: This study is the first to report IDH mutations in ESFTs. The results indicate that ESFTs can harbor IDH mutations in previously known hot-spot regions, although their incidence is rare. Further validation with a larger case-based study would establish more reliable and significant data on prevalence rate and the biological significance of IDH mutations in ESFTs.
Carcinogenesis ; Constriction ; Decarboxylation ; Humans ; Incidence ; Isocitrate Dehydrogenase ; NAD ; Prevalence ; Sarcoma, Ewing*

Papillary thyroid carcinoma (PTC) in children under ten years old is very rare. To date, 18 cases of PTC in children under ten years old (including our two cases) have been reported in Korea. Here, we describe two cases of recurrent PTC with follicular variant and conventional type in an 8-year-old boy and a 7-year-old boy, respectively, and discuss clinicopathologic and molecular characteristics that differ in pediatric patients from adults.
Adult ; Carcinoma, Papillary* ; Child* ; Humans ; Korea ; Male ; Thyroid Gland* ; Thyroid Neoplasms

PURPOSE: This study was to investigate the effect of music therapy as intervention on peripheral neuropathic pain and anxiety of gynecologic cancer patients who were undergoing paclitaxel chemotherapy. METHODS: Hospitalized 62 patients were assigned to an experimental group (n=30) and a control group (n=33) in this quasi-experimental study. The experimental group participated in music therapy that includes listening, singing and song writing during 1 hour. The peripheral neuropathic pain, anxiety and depression were examined as pre-intervention evaluation by using pain scale, anxiety scale (20 questions) and depression scale (20 questions) in both groups. There were no further treatments for the control group while the experimental group involved in music therapy. The peripheral neuropathic pain and anxiety were evaluated in both groups as post-intervention evaluation. RESULTS: Outcomes were verified through hypothesis testing. The level of peripheral neuropathic pain and anxiety in the experimental group was decreased, compared to the control group. CONCLUSION: According to the study, music therapy is a beneficial intervention that reduces peripheral neuropathic pain and anxiety in gynecologic cancer patients. These findings are encouraging and suggest that music therapy can be applied as an effective intervention for minimizing chemotherapy related symptoms.
Anxiety ; Depression ; Humans ; Music ; Music Therapy ; Neuralgia ; Paclitaxel ; Singing ; Writing

PURPOSE: The purpose of this study were to investigate the self-reported quality of life and family burden and to examine the factors associated with the quality of life in patients with cancer. METHODS: 216 patients participated in the cross-sectional study. The European Group of Research and Treatment of Cancer Quality of life Questionnaire (EORTC QLQ-C30) and the Family Burden Scale were sent by mail to 2,000 cancer patients. Two hundred and sixteen patients answered the questionnaire. The stepwise multiple regression was conducted to analyze predictors of overall quality of life. RESULTS: All subscales of EORTC QLQ-C30 were significantly correlated with family burden. The regression analysis of patients with cancer revealed some variables as significant predictors; performance, perceived severity, family burden, time since diagnosis, and sex. CONCLUSION: The results offer a number of recommendations for future research and nursing practice focused on primary care for patients with cancer and their family for improving quality of life.
Cross-Sectional Studies ; Diagnosis ; Humans ; Nursing ; Postal Service ; Primary Health Care ; Quality of Life* ; Surveys and Questionnaires

Currently, no vaccine or established therapeutic agents are available for coronavirus disease 2019. The sharp increase in demand for personal protective equipment (PPE) necessitates an improvement in the protective efficacy of PPE. We evaluated the potential antimicrobial and antiviral effects of a surface-coating disinfectant (3-(trimethoxysilyl)propyldimethyl octadecyl ammonium chloride, Si-QAC) when applied onto PPE. Si-QAC-pre-coated PPE was artificially contaminated with either influenza virus or Salmonella. The results showed significantly reduced influenza and Salmonella titers in Si-QAC-coated PPE; these antimicrobial effects lasted 7 days. This suggests that this surface-coating disinfectant effectively reduces pathogen contamination of PPE, enabling their safe and long-term use.

Currently, no vaccine or established therapeutic agents are available for coronavirus disease 2019. The sharp increase in demand for personal protective equipment (PPE) necessitates an improvement in the protective efficacy of PPE. We evaluated the potential antimicrobial and antiviral effects of a surface-coating disinfectant (3-(trimethoxysilyl)propyldimethyl octadecyl ammonium chloride, Si-QAC) when applied onto PPE. Si-QAC-pre-coated PPE was artificially contaminated with either influenza virus or Salmonella. The results showed significantly reduced influenza and Salmonella titers in Si-QAC-coated PPE; these antimicrobial effects lasted 7 days. This suggests that this surface-coating disinfectant effectively reduces pathogen contamination of PPE, enabling their safe and long-term use.

Escherichia coli O157:H7 is recognized as a significant food-borne pathogen, so rapid identification is important for food hygiene management and prompt epidemiological investigations. The limited prevalence data on Shiga toxin-producing E. coli (STEC) and E. coli O157:H7 in foods and animals in Korea made an assessment of the risks difficult, and the options for management and control unclear. The prevalence of the organisms was examined by newly developed kit-E. coli O157:H7 Rapid kit. For the isolation of E. coli O157:H7, conventional culture, immunomagnetic separation, and E. coli O157:H7 Rapid kit were applied, and multiplex PCR and randomly amplified polymorphic DNA (RAPD) were performed for the molecular determination. There was high molecular relatedness among 11 Korean isolates and 17 U.S. strains at 63% level. Additionally, distinct differentiation between pig and cattle isolates was determined. It implied that RAPD had a capacity to distinguish strains with different sources, however it could not discriminate among isolates according to their differences in the degree of virulence. In antimicrobial susceptibility tests, 45.5% of isolates showed antibiotic resistance to two or more antibiotics. Unlike the isolates from other countries, domestic isolates of E. coli O157:H7 was mainly resistant to ampicillin and tetracylines. In summary, the application of E. coli O157:H7 Rapid kit may be useful to detect E. coli O157:H7 due to its sensitivity and convenience. Moreover, combinational analysis of multiplex PCR together with RAPD can aid to survey the characteristics of isolates.
Abattoirs ; Adhesins, Bacterial/genetics ; Animals ; Cattle ; Cercopithecus aethiops ; Chickens ; Escherichia coli O157/genetics/*isolation&purification ; Escherichia coli Proteins/genetics ; Feces/microbiology ; Food Microbiology ; Hemolysin Proteins/genetics ; Korea ; Meat/*microbiology ; Phylogeny ; Polymerase Chain Reaction/*methods ; Random Amplified Polymorphic DNA Technique/*methods ; *Reagent Kits, Diagnostic ; Shiga-Like Toxin I/genetics ; Shiga-Like Toxin II/genetics ; Swine ; United States ; Vero Cells

BACKGROUND: With prolonged life expectancies, mental illness has emerged as a disabling disorder among people with HIV. MATERIALS AND METHODS: This study was conducted to assess the prevalence of depression and its risk factors among Korean patients with HIV infections. Eighty-two HIV-infected patients completed structured questionnaires including the Beck Depression Inventory and the State-Trait Anxiety Inventory. Subjects with depression were compared to those without depression in terms of demographics, comorbidities, CD4 T-cell count, RNA copy numbers, highly active antiretroviral therapy (HAART) regimens, and adherence. RESULTS: The estimated depression rate was 21% (17 of 82 subjects). Comorbidities (47% vs. 20%, P = 0.01) and unemployment (65% vs. 31%, P = 0.02) were risk factors for depression. Depressive patients were more likely to be anxious (71% vs. 29%, P < 0.01), to frequently miss clinical appointments each year (P = 0.04), and to have higher cumulative time lost to follow-up per month (P <0.01) compared to non-depressive patients. Only three depressive patients were referred to neuropsychologists. CONCLUSIONS: More than 20% of the Korean HIV patients in this study suffered from depression associated with poor adherence. Considering the low level of recognition of depression by clinicians, risk factor-based active assessment is recommended to manage depression properly in HIV-infected patients.
Acquired Immunodeficiency Syndrome ; Antiretroviral Therapy, Highly Active ; Anxiety ; Appointments and Schedules ; Coat Protein Complex I ; Comorbidity ; Demography ; Depression ; HIV ; HIV Infections ; Humans ; Life Expectancy ; Lost to Follow-Up ; Prevalence ; Risk Factors ; RNA ; T-Lymphocytes ; Unemployment ; Surveys and Questionnaires

As breast cancer in patients who have undergone augmentation mammoplasty is usually detected late, prognosis is worse than it would otherwise be. Mammography has led to remarkable in the diagnosis of breast cancer, but didnot so in cancer arising from augmented breasts. FDG-PET, which uses fluorine-18-fluorodeoxy glucose (FDG), a glucose non-metabolized analogue , is able to detect breast cancer which shows more active rates of glucose metabolism. Cancer in a radioopaque dense breast, such as breast with silicone- or paraffin-augmentation and is not found by mammography, might be detected by FDG-PET. We tried to find out diagnostic efficienty of FDG-PET in detecting breast cancer with augmented breast. Between June 1995 and November 1997, eight patients had a history of breast augmentation with silicone or paraffin. Although most of them were examined at local clinic by physical exam, mammography or ultrasonography before visiting our hospital, definitive diagnosis could not be made. One patients wanted both breasts augmentsed with paraffin to be removed, and PET evaluated a total of nine lesions with pathological confirmation. As a result, the mammography detected the breast cancer in only one out of three malignancies, and ultrasonography made false positive result in one patient in augmented breast. In contrast, PET scan predicted all of malignancies and five out of six benign lesions precisely. Two of three breast cancers had axillary FDG uptake interpreted as consistent with metastatic involvement, and in one case with cancer of negative axillary lymph node involvement there was no FDG uptake in the axilla, which were correlated to pathologic finding. Although its high cost made the use of PET as a screening test for all augmented breast not feasible, it would, however, be the best diagnostic choice if other methods failed.
Axilla ; Breast Neoplasms ; Breast* ; Diagnosis ; Electrons* ; Female ; Glucose ; Humans ; Lymph Nodes ; Mammaplasty ; Mammography ; Mass Screening ; Metabolism ; Paraffin ; Positron-Emission Tomography* ; Prognosis ; Silicones ; Ultrasonography

PURPOSE: Chemotherapies for breast cancer generally have strong cellular cytotoxicity and severe side effects. Thus, significant emphasis has been placed on combinations of naturally occurring chemopreventive agents. Silibinin is a major bioactive flavonolignan extracted from milk thistle with chemopreventive activity in various organs including the skin, prostate, and breast. However, the mechanism underlying the inhibitory action of silibinin in breast cancer has not been completely elucidated. Therefore, we investigated the effect of silibinin in MCF-7 human breast cancer cells and determined whether silibinin enhances ultraviolet (UV) B-induced apoptosis. METHODS: The effects of silibinin on MCF-7 cell viability were determined using the MTT assay. The effect of silibinin on PARP cleavage, as the hallmark of apoptotic cell death, and p53 protein expression in MCF-7 cells was analyzed using Western blot. The effect of silibinin on UVB-induced apoptosis in MCF-7 cells was analyzed by flow cytometry. RESULTS: A dose- and time-dependent reduction in viability was observed in MCF-7 cells treated with silibinin. Silibinin strongly induced apoptotic cell death in MCF-7 cells, and induction of apoptosis was associated with increased p53 expression. Moreover, silibinin enhanced UVB-induced apoptosis in MCF-7 cells. CONCLUSION: Silibinin induced a loss of cell viability and apoptotic cell death in MCF-7 cells. Furthermore, the combination of silibinin and UVB resulted in an additive effect on apoptosis in MCF-7 cells. These results suggest that silibinin might be an important supplemental agent for treating patients with breast cancer.
Apoptosis ; Blotting, Western ; Breast ; Breast Neoplasms ; Cell Death ; Cell Survival ; Humans ; MCF-7 Cells ; Milk Thistle ; Prostate ; Silymarin ; Skin