No abstract available.
Erythrocyte Membrane* ; Erythrocytes* ; Hydroxyl Radical* ; Lipid Peroxidation* ; Macrophages, Alveolar* ; Mineral Fibers*

Objectives: The objective of this study was to determine the effect of atrial fibrillation (AF) on the risk of dementia in the Korean elderly. Methods: A 10-year retrospective cohort study was conducted using the National Health Insurance Service-Senior Cohort database. We excluded those who were under 65 years of age as of January 2006 (n=46 113), those who were diagnosed with dementia between 2002 and 2005 (n=9086), and those with a history of stroke prior to AF diagnosis (n=8392). We used a Cox proportional hazards model with a time-varying covariate to determine whether AF is associated with the risk of dementia after adjusting for potential confounders. Results: In univariable Cox regression, the hazard ratio (HR) of dementia according to AF status was 1.28 (95% confidence interval [CI], 1.23 to 1.33). After adjusting for potential confounders, AF was found to increase the risk of dementia (HR, 1.12; 95% CI, 1.07 to 1.17), Alzheimer dementia (HR, 1.12; 95% CI, 1.07 to 1.17), and vascular dementia (HR, 1.10; 95% CI, 1.03 to 1.18). In patients diagnosed with AF, the incidence of dementia was lower (HR, 0.50; 95% CI, 0.47 to 0.52) in patients who were treated with oral anticoagulants. Conclusions Investigating the potential risk factors of dementia in an aged society is important. We found a slightly higher risk of dementia in those with AF than in those without AF, and we therefore concluded that AF is a potential risk factor for dementia.

PURPOSE: Recently have there been a few reports that raised the question that Benign Rolandic Epilepsy (BRE) could be a spectrum. This study was conducted to identify whether or not the clinical and electrophysiological characteristics of typical Rolandic Spikes (RS) are different from those of concomitantly additional frontal or occipital spikes with RS. METHODS: The consecutive 39 patients who showed centro-temporal spikes were divided into typical RS and RS+ groups. We defined RS+ groups as having concomitantly additional frontal or occipital spikes with RS. The independent variables included clinical data 0(age of onset, a significant antecedent event as part of their etiology of epilepsy, nocturnal seizure, abnormal development, abnormal neurologic examination, pattern of seizure, response to medication for at least 1 year and epilepsy syndrome) and electrophysiological data (dipoles, spikes accentuated during sleep). RESULTS: Eighty two percents (32/39) of patients were RS, whereas 18% (7/39) were RS+. The median age of onset was 7 years old and only 10% showed significant antecedent events. Eighty six percents (34/39) of patients had BRE as epilepsy syndrome. Neither clinical factors nor electrophysiological characteristics were different between both groups. CONCLUSION: Although RS+ showed additional spikes more than centro-temporal area, the clinical and electrophysiological characteristics of RS+ were not different from those of RS. Centro-temporal with or without additional spikes could be a homogeneous condition rather than a spectrum.
Age of Onset ; Child ; Electroencephalography ; Epilepsy* ; Epilepsy, Rolandic ; Humans ; Neurologic Examination ; Seizures

PURPOSE: As life expectancy increases, elderly colorectal cancer patients are also increasing. Compared to younger patients, the elderly manifest higher co-morbidity with more advanced and emergent disease. However, recent studies have reported similar surgical approaches irrespective of age distribution. We evaluated the outcome and propriety of surgical treatment of colorectal cancer in the elderly. METHODS: The medial records of 464 colorectal patients, who underwent surgery during 2003 to 2007 in Ewha Womans University Mokdong Hospital were reviewed retrospectively. The patients were divided into three groups according to age: I (younger than 70), II (71~80), III (older than 81). Clinical and histological characteristics, surgical outcomes and survival rates were analyzed. RESULTS: Three hundred and thirty-eight patients belonged to group I, and 104 patients to group II, and group III included 22 patients. Although, male patients were more prevalent in all three groups, female distribution was slightly higher in group III. Clinical characteristics among the three groups did not reveal specific differences except TNM stage distribution. In group I and II, patients with stage II were more common compared to group III, whereas the latter showed most frequently stage III. Histological characteristics and postoperative morbidity rates did not show any difference among the three groups. The survival rate was lowest in group III. However, emergency operation was more frequent in group III, in accordance with increased postoperative complications. CONCLUSION: The elderly demonstrated comparable operative morbidity and mortality to the younger patients. Emergency operation was the only significantly influencing factor in the surgical outcome. Therefore, in colorectal cancer patients, surgical treatment in the elderly should be no longer contraindicated.
Age Distribution ; Aged ; Colorectal Neoplasms ; Emergencies ; Female ; Humans ; Life Expectancy ; Male ; Retrospective Studies ; Survival Rate

OBJECTIVES: Controversial arguments exists on both the case for and against on the accumulation of mitochondrial DNA (mtDNA) deletion in association to tissue and age. The debate continues as to whether this mutation is a major contributor to the phenotypic expression of aging and common degenerative diseases or simply a clinical insignificant epiphenomenon. The objective of this study was to determine whether the accumulation of mtDNA deletion is correlated with age-related and tissue-specific variation. MATERIALS AND METHODS: One hundred and fifty-seven tissues from blood, ovary, uterine muscle, and abdominal muscle were obtained from patients ranging in age from 31~60 years. After reviewing the clinical reports, patients with mitochondrial disorder were excluded from this study. The tissues were obtained at gynecological surgeries with the consent of the patient. Total DNA isolated from blood, ovary, uterine muscle, and abdominal muscle was amplified by two rounds of PCR using two pairs of primers corresponding to positions 8225-8247 (sense), 13551-13574 (antisense) for the area around deleted mtDNA and 8421-8440 (sense), 13520-13501 (antisense) for nested PCR product. A statistical analysis was performed by c2-test. RESULTS: About 0% of blood, 94.8% of ovary, 71.4% of uterine muscle, and 86.1% abdominal muscle harbored mtDNA deletion. When we examined the proportion of deleted mtDNA according to age deletion rate was 90% of ovary, 63.6% of uterine muscle, 77.7% of abdominal muscle in thirties and 100% of all tissue in fifties. CONCLUSION: The findings of this study suggest that the mtDNA deletion is varied in tissue-specific pattern and increases with aging.
Abdominal Muscles ; Aging ; Animals ; DNA ; DNA, Mitochondrial* ; Female ; Gynecologic Surgical Procedures ; Humans ; Mice ; Mitochondrial Diseases ; Myometrium ; Ovary ; Polymerase Chain Reaction

A 24-year-old man presented with mental change, fever, abdominal pain, tenderness and palpable mass on the lower abdomen. He was a non-Korean engineer and did not accompany a legal guardian, so medical history taking was difficult due to his mental status. Brain magnetic resonance imaging showed multiple rim-enhanced lesions of the brain, and abdominal computed tomography showed huge paraspinal abscess. Chest X-ray and computed tomography showed poorly defined nodular opacities. We initially thought that this patient was infected with toxoplasmosis with typical cerebral image finding and immunoglobulin laboratory finding of cerebrospinal fluid and serum study. The abdominal abscess was confirmed as tuberculosis through the pathologic finding of caseous necrosis. We used anti-tuberculosis medication and anti-toxoplasmosis medication for almost 4 months, and then his clinical state and radiological findings were considerably improved.
Abdomen ; Abdominal Abscess ; Abdominal Pain ; Abscess ; Brain ; Fever ; Humans ; Immunoglobulins ; Legal Guardians ; Magnetic Resonance Imaging ; Medical History Taking ; Necrosis ; Thorax ; Toxoplasmosis ; Toxoplasmosis, Cerebral ; Tuberculosis ; Young Adult

Acting as hormone mimics or antagonists in the interaction with hormone receptors, endocrine disrupting chemicals (EDCs) have the potentials of disturbing the endocrine system in sex steroid hormone-controlled organs and tissues. These effects may lead to the disruption of major regulatory mechanisms, the onset of developmental disorders, and carcinogenesis. Especially, among diverse EDCs, xenoestrogens such as bisphenol A, dioxins, and di(2-ethylhexyl)phthalate, have been shown to activate estrogen receptors (ERs) and to modulate cellular functions induced by ERs. Furthermore, they appear to be closely related with carcinogenicity in estrogen-dependant cancers, including breast, ovary, and prostate cancers. In in vivo animal models, prenatal exposure to xenoestrogens changed the development of the mouse reproductive organs and increased the susceptibility to further carcinogenic exposure and tumor occurence in adults. Unlike EDCs, which are chemically synthesized, several phytoestrogens such as genistein and resveratrol showed chemopreventive effects on specific cancers by contending with ER binding and regulating normal ER action in target tissues of mice. These results support the notion that a diet containing high levels of phytoestrogens can have protective effects on estrogen-related diseases. In spite of the diverse evidences of EDCs and phytoestrogens on causation and prevention of estrogen-dependant cancers provided in this article, there are still disputable questions about the dose-response effect of EDCs or chemopreventive potentials of phytoestrogens. As a wide range of EDCs including phytoestrogens have been remarkably increasing in the environment with the rapid growth in our industrial society and more closely affecting human and wildlife, the potential risks of EDCs in endocrine disruption and carcinogenesis are important issues and needed to be verified in detail.
Adult ; Animals ; Benzhydryl Compounds ; Breast ; Diet ; Dioxins ; Endocrine Disruptors ; Endocrine System ; Estrogens ; Female ; Genistein ; Humans ; Mice ; Models, Animal ; Ovary ; Phenols ; Phytoestrogens ; Prostatic Neoplasms ; Receptors, Estrogen ; Stilbenes

Posttransplant diabetes mellitus, a complication due to corticosteroids and the calcineurin inhibitors, cyclosporine and tacrolimus, is commonly regarded as a form of type 2 diabetes mellitus. Diabetes ketoacidosis, which requires relative insulin deficiency to impair fatty acid metabolism, is a complication of type 1 diabetes mellitus. We report two patients who presented with diabetic ketoacidosis after kidney transplantation. Two patients presented with severe hyperglycemia, significant ketosis and metabolic acidosis of variable severity. One patient was treated with a cyclosporine-based regimen, and the other with a tacrolimus-based regimen. Both were found to have moderate to high serum levels of calcineurin inhibitors on presentation. Our experience suggests that post-transplant diabetes mellitus, in association with calcineurin inhibitor, may result in ketoacidosis either secondary to relative beta cell dysfunction, peripheral insulin resistance, or a combination of the two effects. Post transplant diabetes mellitus can be an atypical form of adult-onset diabetes with features of both type 1 and type 2 diabetes mellitus.
Acidosis ; Adrenal Cortex Hormones ; Calcineurin ; Cyclosporine ; Diabetes Mellitus ; Diabetes Mellitus, Type 1 ; Diabetes Mellitus, Type 2 ; Diabetic Ketoacidosis ; Humans ; Hyperglycemia ; Insulin ; Insulin Resistance ; Ketosis ; Kidney Transplantation ; Metabolism ; Tacrolimus

Posttransplant diabetes mellitus, a complication due to corticosteroids and the calcineurin inhibitors, cyclosporine and tacrolimus, is commonly regarded as a form of type 2 diabetes mellitus. Diabetes ketoacidosis, which requires relative insulin deficiency to impair fatty acid metabolism, is a complication of type 1 diabetes mellitus. We report two patients who presented with diabetic ketoacidosis after kidney transplantation. Two patients presented with severe hyperglycemia, significant ketosis and metabolic acidosis of variable severity. One patient was treated with a cyclosporine-based regimen, and the other with a tacrolimus-based regimen. Both were found to have moderate to high serum levels of calcineurin inhibitors on presentation. Our experience suggests that post-transplant diabetes mellitus, in association with calcineurin inhibitor, may result in ketoacidosis either secondary to relative beta cell dysfunction, peripheral insulin resistance, or a combination of the two effects. Post transplant diabetes mellitus can be an atypical form of adult-onset diabetes with features of both type 1 and type 2 diabetes mellitus.
Acidosis ; Adrenal Cortex Hormones ; Calcineurin ; Cyclosporine ; Diabetes Mellitus ; Diabetes Mellitus, Type 1 ; Diabetes Mellitus, Type 2 ; Diabetic Ketoacidosis ; Humans ; Hyperglycemia ; Insulin ; Insulin Resistance ; Ketosis ; Kidney Transplantation ; Metabolism ; Tacrolimus

BACKGROUND: Vimentin is the major intermediate-size filament in the cytoplasm of cells from mesenchymal origin. The HL-60 cell is a unique human leukemic cell line capable of terminal differentiation with several chemical inducers, and then the cell line becomes a fre#quently described model system for cell differentiation in vitro. Vimentin mRNA is reduced during all-trans retinoic acid (retinoic acid) -dependent differentication but increased by 12-0-tetradecanoylphorbol-13-acetate (TPA). In this paper, we have investigated on the mechanism of transcriptional repression of vimentin gene during retinoic acid-dependent differentication of HL-60 cell. METHODS: HL-60 cells were grown in RPMI 1640 medium supplemented with 10% heat-inactivated fetal bovine serum and antibiotics in a humidified 5% CO at 37C. Total RNA was prepared by a modification of the method of Karlinsey et al. Northern blot hybridization was performed by the method of Virca et al. EcoRI fragment of pVIM-GEM was used as probe for vimentin mRNA. DNA mobility shift assay was performed by the method of Lim et al. End labeled DNA probe (Upper strand, 5-CGCITGATGAGTCAGCCG-3) for AP-1 binding activity was mixed with nuclear extracts in a 20 pL reaction volume containing 300 mM KCI, 60 mM HEPES, pH 7.9, 25mM MgC1, 1mM EDTA, 1mM DTT, 60% glycerol, and 2 pg of poly[dI-dC]. RESULTS: The level of vimentin mRNA was decreased at 12 hours after retinoic acid treatment, and not detected at 48 hours. The level of vimentin mRNA was reduced in proportion to concentration of retinoic acid, Retinoic acid-reduced vimentin mRNA was no change in cells treated with cycloheximide. Retinoic acid-dependent decrease of vimentin mRNA was partially recovered by staurosporin pretreatment. In DNA mobility shift assay, AP-1 binding activity was reduced at 48 hr during retinoic acid-induced differentiation. CONCLUSION: These results suggest that the transcriptional repression of vimentin gene during retinoic acid-induced differentiation in HL-60 cells is correlated with reduction of DNA binding activity of AP-1.
Anti-Bacterial Agents ; Blotting, Northern ; Cell Differentiation ; Cell Line ; Cycloheximide ; Cytoplasm ; DNA ; Edetic Acid ; Electrophoretic Mobility Shift Assay ; Glycerol ; HEPES ; HL-60 Cells* ; Humans ; Hydrogen-Ion Concentration ; Repression, Psychology* ; RNA ; RNA, Messenger ; Transcription Factor AP-1 ; Tretinoin ; Vimentin*