Background: Lipopolysaccharide (LPS) exerts cytotoxic effects on brain cells, especially on those belonging to the oligodendrocyte lineage, in preterm infants. The susceptibility of oligodendrocyte lineage cells to LPS-induced inflammation is dependent on the developmental stage. This study aimed to investigate the effect of LPS on oligodendrocyte lineage cells at different developmental stages in a microglial cell and oligodendrocyte coculture model. Methods: The primary cultures of oligodendrocytes and microglia cells were prepared from the forebrains of 2-day-old Sprague–Dawley rats. The oligodendrocyte progenitor cells (OPCs) co-cultured with microglial cells were treated with 0 (control), 0.01, 0.1, and 1 µg/mL LPS at the D3 stage to determine the dose of LPS that impairs oligodendrocyte differentiation. The co-culture was treated with 0.01 µg/mL LPS, which was the lowest dose that did not impair oligodendrocyte differentiation, at the developmental stages D1 (early LPS group), D3 (late LPS group), or D1 and D3 (double LPS group). On day 7 of differentiation, oligodendrocytes were subjected to neural glial antigen 2 (NG2) and myelin basic protein (MBP) immunostaining to examine the number of OPCs and mature oligodendrocytes, respectively. Results: LPS dose-dependently decreased the proportion of mature oligodendrocytes (MBP+ cells) relative to the total number of cells. The number of MBP+ cells in the early LPS group was significantly lower than that in the late LPS group. Compared with those in the control group, the MBP+ cell numbers were significantly lower and the NG2+ cell numbers were significantly higher in the double LPS group, which exhibited impaired oligodendrocyte lineage cell development, on day 7 of differentiation. Conclusion Repetitive LPS stimulation during development significantly inhibited brain cell development by impairing oligodendrocyte differentiation. In contrast, brain cell development was not affected in the late LPS group. These findings suggest that inflammation at the early developmental stage of oligodendrocytes increases the susceptibility of the preterm brain to inflammation-induced injury.

OBJECTIVES: Sleep disturbance is a very rapidly growing disease with aging. The purpose of this study was to investigate the prevalence of sleep disturbances and its predictive factors in a three-year cohort study of people aged 60 years and over in Korea. METHODS: In 2012 and 2014, we obtained data from a survey of the Korean Social Life, Health, and Aging Project. We asked participants if they had been diagnosed with stroke, myocardial infarction, angina pectoris, arthritis, pulmonary tuberculosis, asthma, cataract, glaucoma, hepatitis B, urinary incontinence, prostate hypertrophy, cancer, osteoporosis, hypertension, diabetes, hyperlipidemia, or metabolic syndrome. Cognitive function was assessed using the Mini-Mental State Examination for dementia screening in 2012, and depression was assessed using the Center for Epidemiologic Studies Depression Scale in 2012 and 2014. In 2015, a structured clinical interview for Axis I psychiatric disorders was administered to 235 people, and sleep disturbance was assessed using the Pittsburgh Sleep Quality Index. The perceived stress scale and the State-trait Anger Expression Inventory were also administered. Logistic regression analysis was used to predict sleep disturbance by gender, age, education, depression score, number of coexisting diseases in 2012 and 2014, current anger score, and perceived stress score. RESULTS: Twenty-seven percent of the participants had sleep disturbances. Logistic regression analysis showed that the number of medical diseases three years ago, the depression score one year ago, and the current perceived stress significantly predicted sleep disturbances. CONCLUSION: Comorbid medical disease three years previous and depressive symptoms evaluated one year previous were predictive of current sleep disturbances. Further studies are needed to determine whether treatment of medical disease and depressive symptoms can improve sleep disturbances.
Aged* ; Aging ; Anger ; Angina Pectoris ; Arthritis ; Asthma ; Cataract ; Cognition ; Cohort Studies ; Comorbidity ; Dementia ; Depression ; Education ; Epidemiologic Studies ; Follow-Up Studies* ; Glaucoma ; Hepatitis B ; Humans ; Hyperlipidemias ; Hypertension ; Hypertrophy ; Korea ; Logistic Models ; Mass Screening ; Myocardial Infarction ; Osteoporosis ; Prevalence ; Prostate ; Sleep Initiation and Maintenance Disorders ; Stroke ; Tuberculosis, Pulmonary ; Urinary Incontinence

OBJECTIVE: The practice of antipsychotic polypharmacy is common, despite lack of supporting evidence. The aims of this study were to estimate the prevalence of antipsychotic polypharmacy in a psychiatric university hospital in Korea and find out the clinical factors associated with antipsychotic polypharmacy. METHODS: We reviewed medical records of the patients discharged from Severance Mental Health Hospital (SMH) for the period of 1, January to 31, December 2010. Patients should be diagnosed as having schizophrenia, schizoaffective disorder, schizophreniform disorder, brief psychotic disorder, delusional disorder or psychotic disorder not otherwise specified. RESULTS: In 2010, 260 patients in SMH were prescribed with antipsychotics and 47.3% (n=123) of them were discharged under antipsychotic polypharmacy treatment. The most commonly prescribed antipsychotics for combination therapy was quetiapine (n=64). The most prevalent combination of drugs was risperidone plus quetiapine (n=20). Logistic regression analysis showed that the use of high-dose antipsychotics, first-generation antipsychotics, and long hospital duration were significantly associated with antipsychotic polypharmacy. CONCLUSION: Although the controlled evidence for efficacy and safety as a strategy remains inconclusive, antipsychotic polypharmacy is a common pharmacological strategy as it is illustrated in our study. Considering high antipsychotic doses related with antipsychotic polypharmacy, careful monitoring of side effect and efficacy is needed.
Antipsychotic Agents ; Dibenzothiazepines ; Humans ; Korea ; Logistic Models ; Medical Records ; Mental Health ; Polypharmacy ; Prevalence ; Psychotic Disorders ; Risperidone ; Schizophrenia ; Schizophrenia, Paranoid ; Quetiapine Fumarate

OBJECTIVES: The aim of this study was to find out the psychological changes associated with internet addiction between before and after the military drill among the young male army recruits. METHODS: All 1091 participants were army recruits aged from 19 to 22 years who participated in the 5-week military drill. They were assessed with some self-reported questionnaires [Sociodemographic questionnaires, Young's Internet Addiction Scale (IAS), the State-Trait Anxiety Inventory (STAI), the Beck Depression Inventory (BDI), the Barratt Impulsiveness Scale (BIS), the Attention-Deficit/Hyperactivity Disorder Self-Rated Scale (ASRS)]. They were divided into two groups, One is the internet addiction tendency group and the other is non-addiction group according to the IAS score. And the severity of the internet addiction tendency, depression, anxiety and impulsiveness were evaluated by the IAS, the STAI, the BDI, the BIS, the ASRS before and after military drill. RESULTS: The result of the paired t-test shows that the IAS, the STAI, the BDI, the BIS, the ASRS scores decreased after military drill in both non-addiction group and internet addiction tendency group. The result of the repeated measures ANOVA shows that there is an interaction effect between the changes of ASRS-hyperactivity (F = 23.437, p < 0.001), ASRS-impulsiveness (F = 4.896, p = 0.027), BIS-total (F = 4.057, p = 0.044), BIS-motor impulsiveness (F = 13.609, p < 0.001) scores and groups. The result of the generalized estimating equation shows that internet addiction tendency is associated with ASRS-inattention (beta = 0.075, p < 0.001), ASRS-hyperactivity (beta = 0.092, p = 0.002), STAI-trait anxiety (beta = 0.046, p < 0.001), BIS-motor impulsiveness (beta = 0.119, p = 0.028). CONCLUSIONS: The results show that psychopathologies such as internet addiction tendency, depression, anxiety, impulsiveness may improve after military drill regardless of the groups. Internet addiction tendency may be related to the ASRS-inattention, ASRS-hyperactivity, STAI-trait anxiety, motor-impulsiveness. So these findings may be considered in the treatment of internet addiction in terms of the impulsiveness control.
Anxiety ; Depression ; Humans ; Internet* ; Male* ; Military Personnel

OBJECTIVES: Though gastric cancer is one of the most common cancer in Korea, there have been few studies to explore psychological distress in gastric cancer. The purpose of this study was to investigate the prevalence and associated risk factors of psychological distress among patients with gastric cancer. METHODS: With consecutive sampling, a total of 274 patients with gastric cancer who admitted to a cancer center in a general hospital were recruited and assessed on psychological distress using the Hospital Anxiety and Depression Scale(HADS). Sociodemographic and cancer-related clinical variables were also evaluated. RESULTS: One hundred fifty-three(55.8%) patients with gastric cancer showed psychological distress. Logistic regression models revealed that having alcohol drinking experience[odds ratio(OR)=2.10, p=0,034] and low performance status(OR=2.40 p=0.002) were significantly associated with psychological distress in patients with gastric cancer. CONCLUSIONS: These findings indicate that approximately half of patients with gastric cancer suffered from psychological distress and having alcohol drinking experience and low performance status would be associated risk factors, suggesting the need for distress screening and psychosocial supportive care in patients with gastric cancer.
Alcohol Drinking ; Anxiety ; Depression ; Hospitals, General ; Humans ; Korea ; Logistic Models ; Mass Screening ; Prevalence ; Risk Factors ; Stomach Neoplasms

OBJECTIVES: We studied the psychometric properties of a Korean version of the Ambiguous Intentions Hostility Questionnaire (K-AIHQ), which measures hostile social-cognitive biases for use in the research on paranoia. METHODS: The translation and back-translation of the AIHQ with concern for the cultural differences were done according to the standard procedure. A sample of 83 healthy volunteers completed the K-AIHQ. RESULTS: The scores of the K-AIHQ were comparable to the results of the original studies. The Paranoia Scale was correlated with the K-AIHQ, but Magical Ideation and Perceptual Aberration scales were not correlated with the K-AIHQ. The interrater reliabilities of the items in each situation were in the acceptable range. CONCLUSION: The KAIHQ seems to be a reliable and valid test to measure the hostile social cognitive biases of patients with paranoia.
Bias (Epidemiology) ; Hostility ; Humans ; Intention ; Magic ; Paranoid Disorders ; Psychometrics ; Surveys and Questionnaires ; Weights and Measures

BACKGROUND: This study compared the bronchodilator efficacy and safety of tiotropium inhalation capsules (18microgram once daily) with a ipratropium metered dose inhaler (2 puffs of 20microgram q.i.d.) in patients with chronic obstructive pulmonary disease (COPD). METHOD: After the initial screening assessment and a two-week run-in period, patients received either tiotropium 18microgram once daily or ipratropium 40microgram four times daily over a period of 4 weeks in a double blind, double dummy, parallel group study. The outcome measures were the lung function, the daily records of the peak expiratory flow rate (PEFR), the patients' questionnaire, and the use of concomitant salbutamol. The forced expiratory volume in one second (FEV1) and the forced vital capacity (FVC) were measured 5 minutes before inhalation, and 0.5, 1, 2 and 3 hours after inhaling the study drug on days 0, 14 and 28. RESULT: In 16 centers, 134 patients with a mean (SD) age of 66 (7) years and a predicted FEV1 of 42 (12)% were analyzed. The trough FEV1 response was significantly higher in the tiotropium group than in the ipratropium group after a four-week treatment period. The weekly mean morning PEFR of the tiotropium group was consistently higher than that of the ipratropium group during the 4-week treatment period with differences ranging from 12.52 to 13.88 l/min, which were statistically significant. Tiotropium was well tolerated by the COPD patients during the 4-week treatment period and had a similar safety profile to ipratropium. CONCLUSION: This study shows that tiotropium administrated once daily has a superior bronchodilator effect with a similar safety profile in treating COPD patients compared with ipratropium, inhaled four times daily.
Adult* ; Albuterol ; Bronchodilator Agents ; Capsules ; Forced Expiratory Volume ; Humans ; Inhalation ; Ipratropium* ; Lung ; Mass Screening ; Metered Dose Inhalers ; Outcome Assessment (Health Care) ; Peak Expiratory Flow Rate ; Pulmonary Disease, Chronic Obstructive* ; Surveys and Questionnaires ; Vital Capacity ; Tiotropium Bromide

OBJECTIVES: The aim of this study was to examine the behavioral and emotional problems associated with nocturnal enuresis in Korean children. METHODS: Three hundred eighteen children with nocturnal enuresis, together with their parents, completed the Child Behavior Checklist (CBCL), Disruptive Behavior Disorder Scale according to DSM-IV (DBDS), Children's Depression Inventory (CDI), State-Trait Anxiety Inventory for Children (STAIC), and Piers-Harris Children's Self-Concept Scale (PHCSC). Ninety-three normal students were selected as the control group. RESULTS: Compared to the normal control group, the mean scores with regard to the withdrawn, social problems, attention problems, delinquent behavior, aggressive behavior, externalizing problems and total problems profiles were significantly higher in the nocturnal enuresis group according to the CBCL results. The nocturnal enuresis group also scored significantly higher in the ADHD and ODD profiles of the DBDS. The nocturnal enuresis group was more depressed and anxious than the control group according to the results of the CDI and STAI. The mean score of the PHCSC was significantly lower in the nocturnal enuresis group when compared to the normal control group. CONCLUSION: The results of this study suggest that children with nocturnal enuresis in Korea have clinically relevant behavioral and emotional problems. The findings support the link between nocturnal enuresis and psychopathology in Korean children.
Anxiety ; Attention Deficit and Disruptive Behavior Disorders ; Checklist ; Child Behavior ; Child* ; Depression ; Diagnostic and Statistical Manual of Mental Disorders ; Humans ; Korea ; Nocturnal Enuresis* ; Parents ; Psychopathology ; Social Problems

KMAP (Korean Medication Algorithm Project for Major Psychiatric Disorders) was established to develop Korean algorithm for major psychiatric disorders. KMAP developed the draft of Korean medication algorithm for schizophrenia and assessed the level of satisfaction and fitness in the Review Committee using questionnaire about this draft. The members of Review Committee were medical doctors of psychiatry who were interested in the research of psychiatric drugs or were experienced in psychiatric pharmacotherapy in college of medicine, mental hospital or private psychiatric clinic. 57 psychiatrists were appointed as committee of re-examination of algorithm and 48 (84.2%) answered the questionnaire. The Korean medication algorithm draft for schizophrenia was based upon Korean clinical research, clinical experience of Korean professionals and clinical guidelines of other countries. The draft of this algorithm was categorized into 32 items, then we made a questionnaire according to these items. The answers of each question were consist of 5 levels of satisfaction, and the committee members could propose free opinion about these questions. The results of questionnaire were presented and discussed in an open forum. In most items except two, over half of committee members answered that `correction unnecessary of draft'. The 2 items showing low level of satisfaction were `trial of atypical antipsychotics at level 1', `trial of typical antipsychotics at level 4'. These items were revised from the draft after having discussion in an open forum. And then we published the first edition of `Korean Medication Algorithm for Schizophrenia'.
Advisory Committees ; Antipsychotic Agents ; Committee Membership ; Drug Therapy ; Hospitals, Psychiatric ; Psychiatry ; Surveys and Questionnaires* ; Schizophrenia*

As a solution about many problems of pharmacotherapy for Korean patients with major psychiatric disorders, Korean Medication Algorithm Project for Major Psychiatric Disorders (KMAP) was launched. Recently, a medication algorithm for schizophrenic patients was developed and distributed. This review article showed the designs, processes and methods for developing this algorithm. Also we compared the development of Korean algorithm for schizophrenics with other foreign representative algorithms or clinical practice guidelines. We hope that this review elicit the productive criticism about the rigour, the system of development and the objectivity of content. The limitations and problems of Korean algorithm are also discussed in this review.
Drug Therapy ; Hope ; Humans ; Schizophrenia