This paper is to review Attention Deficit-Hyperactivity Disorder (ADHD) in the developmental perspective, focusing on clinical features, diagnosis and treatment of ADHD throughout life stage. When diagnosed with ADHD, before entering elementary school early diagnosis and early intervention is encouraged to reduce various impairments that occur during development. Thirty to eighty percent of school-age ADHD symptoms remain throughout the adolescence or meet the ADHD diagnosis criteria. During adolescence, hyperactivity and impulsiveness from other existing symptoms become less severe but children have insufficiency to continue studying or task compared to their peers. Pharmacologic treatment had been shown to be the most effective treatment regimen for adolescents who continue to have ADHD symptoms. In adults, representative symptoms of ADHD, hyperactivity and impulsiveness, often gradually decrease while lack of concentration remains. As Conner's Adult ADHD Diagnostic Interview for DSM-IV (CAADID), a structured interview for the diagnosis of adulthood ADHD has been translated into Korean, it can be applied clinically. Pharmacological and nonpharmacological treatment in adults had been shown to be effective.
Adolescent ; Adult ; Attention Deficit Disorder with Hyperactivity ; Child ; Diagnosis ; Diagnostic and Statistical Manual of Mental Disorders ; Early Diagnosis ; Early Intervention (Education) ; Humans

OBJECTIVES: This study was conducted in order to explore the prevalence of suicidal behavior and the risk or protecting factors. In addition, childhood trauma, school violence, and social support were hypothesized to have an association with suicidal behavior. METHODS: Data were collected by self-report questionnaire from 1219 students selected from middle schools in Guri-city, Korea. The students were asked to complete self-questionnaires and sociodemographic variables were collected for identification of factors associated with suicidal behavior. RESULTS: The prevalence of suicidal attempt was 1.1% (0.6%, 1.3%) from the total sample. Meaningful predictors of suicidal ideation were female, low socioeconomic status, low self-esteem, emotional abuse, neglect, delinquency, perpetration of school violence, family support, and friend support, in addition to the significant effect of depressive mood. In the case of suicidal attempt, female, low socioeconomic status, or delinquency showed a significant incremental effect, in addition to the explaining variance of depressive mood and suicidal ideation. CONCLUSION: Childhood experience should be dealt with, and school violence should be controlled in order to modulate mood disturbance and pessimistic ideation, which can block the channel to suicidal attempt. In addition, development of strategies for management of depression and delinquency is needed for prevention of suicidal attempt.
Adolescent* ; Depression ; Domestic Violence ; Female ; Friends ; Humans ; Korea ; Prevalence ; Surveys and Questionnaires ; Social Class ; Suicidal Ideation* ; Suicide ; Violence

We report two outpatients, one with schizophrenia and one with schizoaffective disorder, who developed manic or hypomanic episodes following the initiation of blonanserin during the course of treatment. Blonanserin is a novel antipsychotic that acts as a 5-HT and D2 receptor antagonist. Both patients developed hypomanic episodes within 2 weeks of receiving a small dose (6-8 mg) of blonanserin, and one patient later developed full-blown mania; both episodes ended within 1 month of discontinuing blonanserin. The mood alteration observed in these cases suggests a possible antidepressant effect of blonanserin; thus, clinicians should monitor mood changes when administering this antipsychotic.
Antipsychotic Agents ; Bipolar Disorder ; Humans ; Outpatients ; Psychotic Disorders* ; Schizophrenia* ; Serotonin

The receptor activator of NF-kappaB ligand (RANKL) signal is an activator of tumor necrosis factor receptor-associated factor 6 (TRAF6), which leads to the activation of NF-kappaB and other signal transduction pathways essential for osteoclastogenesis, such as Ca2+ signaling. However, the intracellular levels of inositol 1,4,5-trisphosphate (IP3) and IP3-mediated cellular function of RANKL during osteoclastogenesis are not known. In the present study, we determined the levels of IP3 and evaluated IP3-mediated osteoclast differentiation and osteoclast activity by RANKL treatment of mouse leukemic macrophage cells (RAW 264.7) and mouse bone marrow-derived monocyte/macrophage precursor cells (BMMs). During osteoclastogenesis, the expression levels of Ca2+ signaling proteins such as IP3 receptors (IP3Rs), plasma membrane Ca2+ ATPase, and sarco/endoplasmic reticulum Ca2+ ATPase type2 did not change by RANKL treatment for up to 6 days in both cell types. At 24 h after RANKL treatment, a higher steady-state level of IP3 was observed in RAW264.7 cells transfected with green fluorescent protein (GFP)-tagged pleckstrin homology (PH) domains of phospholipase C (PLC) delta, a probe specifically detecting intracellular IP3 levels. In BMMs, the inhibition of PLC with U73122 [a specific inhibitor of phospholipase C (PLC)] and of IP3Rs with 2-aminoethoxydiphenyl borate (2APB; a non-specific inhibitor of IP3Rs) inhibited the generation of RANKL-induced multinucleated cells and decreased the bone-resorption rate in dentin slice, respectively. These results suggest that intracellular IP3 levels and the IP3-mediated signaling pathway play an important role in RANKL-induced osteoclastogenesis.
Animals ; Blood Proteins ; Boron Compounds ; Calcium-Transporting ATPases ; Cell Membrane ; Dentin ; Estrenes ; Inositol ; Inositol 1,4,5-Trisphosphate ; Inositol 1,4,5-Trisphosphate Receptors ; Macrophages ; Mice ; NF-kappa B ; Osteoclasts ; Phosphoproteins ; Proteins ; Pyrrolidinones ; Receptor Activator of Nuclear Factor-kappa B ; Reticulum ; Signal Transduction ; Tumor Necrosis Factor-alpha ; Type C Phospholipases

The gingival epithelium of the oral cavity is constantly exposed to exogenous stimuli such as bacterial toxins, allergens, and thermal changes. These exogenous stimuli are resisted by innate host defense in gingival epithelial cells. However, it is unclear exactly how the exogenous stimuli affect detrimentally on the human gingival epithelial cells. Here, we investigated whether the allergen, such as house dust mite (HDM) extract, is linked to Ca2+ signaling and proinflammatory cytokine expression in primary cultured human gingival epithelial cells. HDM extract induced an increase in intracellular Ca2+ concentration ([Ca2+]i) in a dose-dependent manner. Extracellular Ca2+ depletion did not affected on the HDM extract-induced increase in [Ca2+]i. The HDM extract-induced increase in [Ca2+]i was abolished by the treatment with U73122 and 2-APB, which are inhibitors of phospholipase C (PLC) and inositol 1,4,5-trisphosphate (IP3) receptor. Moreover, HDM extract induced the mRNA expression of pro-inflammatory cytokine, interleukin (IL)-8. These results suggest that HDM extract triggers PLC/IP3-dependent Ca2+ signaling and IL-8 mRNA expression in primary cultured human gingival epithelial cells.
Allergens ; Bacterial Toxins ; Epithelial Cells* ; Epithelium ; Humans ; Inositol 1,4,5-Trisphosphate ; Interleukin-8* ; Interleukins ; Mouth ; Pyroglyphidae* ; RNA, Messenger ; Type C Phospholipases

OBJECTIVES: The current study examined the effect of birth weight on the relationship between age and IQ of children, who were born preterm with very low birth weight (VLBW) or extremely low birth weight (ELBW). METHODS: The study subjects were 82 children, aged between 3–5 years, who visited the neonatal intensive care unit of a university hospital located in Seoul. The children had been born prematurely with VLBW or ELBW. Their IQ was tested using the performed Korean-Wechsler Preschool and Primary Scale of Intelligence fourth edition. RESULTS: A hierarchical regression analysis showed a significant interaction effect of birth weight and age on Full Scale IQ (FSIQ); the effect of age on FSIQ differed according to birth weight. For the group with VLBW, FSIQ was more likely to be higher with increasing age. Conversely, for the group with ELBW, FSIQ remained low regardless of the age level. In addition, birth weight and age had a significant interaction effect on the Visual Spatial Index. Birth weight had a significant main effect on Verbal Comprehension Index. CONCLUSION: This research suggested the possibility of predicting the cognitive developmental of premature children, by highlighting the fact that prematurely born children, with VLBW/ELBW, have different cognitive developmental trajectories.
Birth Weight ; Child ; Comprehension ; Humans ; Infant, Low Birth Weight* ; Infant, Newborn ; Infant, Very Low Birth Weight ; Intelligence ; Intensive Care, Neonatal ; Premature Birth ; Seoul

The etiology of periodontal disease is multifactorial. Exogenous stimuli such as bacterial pathogens can interact with toll-like receptors to activate intracellular calcium signaling in gingival epithelium and other tissues. The triggering of calcium signaling induces the secretion of pro-inflammatory cytokines such as interleukin-8 as part of the inflammatory response; however, the exact mechanism of calcium signaling induced by bacterial toxins when gingival epithelial cells are exposed to pathogens is unclear. Here, we investigate calcium signaling induced by bacteria and expression of inflammatory cytokines in human gingival epithelial cells. We found that peptidoglycan, a constituent of gram-positive bacteria and an agonist of toll-like receptor 2, increases intracellular calcium in a concentration-dependent manner. Peptidoglycan-induced calcium signaling was abolished by treatment with blockers of phospholipase C (U73122), inositol 1,4,5-trisphosphate receptors, indicating the release of calcium from intracellular calcium stores. Peptidoglycan-mediated interleukin-8 expression was blocked by U73122 and 1,2-bis(2-aminophenoxy)ethane-N,N,N',N'-tetraacetic acid tetrakis (acetoxymethyl ester). Moreover, interleukin-8 expression was induced by thapsigargin, a selective inhibitor of the sarco/endoplasmic reticulum calcium ATPase, when thapsigargin was treated alone or co-treated with peptidoglycan. These results suggest that the gram-positive bacterial toxin peptidoglycan induces calcium signaling via the phospholipase C/inositol 1,4,5-trisphosphate pathway, and that increased interleukin-8 expression is mediated by intracellular calcium levels in human gingival epithelial cells.
Bacteria ; Bacterial Toxins ; Calcium ; Calcium Signaling* ; Calcium-Transporting ATPases ; Cytokines ; Epithelial Cells ; Epithelium* ; Gram-Positive Bacteria ; Humans ; Inflammation ; Inositol 1,4,5-Trisphosphate Receptors ; Interleukin-8* ; Peptidoglycan* ; Periodontal Diseases ; Phospholipases ; Reticulum ; Thapsigargin ; Toll-Like Receptor 2 ; Toll-Like Receptors ; Type C Phospholipases

Background: The main barrier to the effective rheumatoid arthritis (RA) therapy is poor adherence. Coronavirus disease 2019 (COVID-19) pandemic have led to a significant change in the pattern and the number of medical visits. We assessed changing patterns of medical visits and no-show, and identified factors associated with no-show in patients with RA during COVID-19 pandemic. Methods: RA patients treated with disease-modifying antirheumatic drugs at least 6 months who had been in remission or those with mild disease activity were observed for 6 months from February to July 2020. No-show was defined as a missed appointment that was not previously cancelled by the patient and several variables that might affect no-show were examined. Results: A total of 376 patients and 1,189 appointments were evaluated. Among 376 patients, 164 patients (43.6%) missed appointment more than one time and no-show rate was 17.2% during COVID-19 pandemic. During the observation, face-to-face visits gradually increased and no-show gradually decreased. The logistic regression analysis identified previous history of no-show (adjusted odds ratio [OR], 2.225; 95% confidence interval [CI], 1.422–3.479; P < 0.001) and fewer numbers of comorbidities (adjusted OR, 0.749; 95% CI, 0.584–0.961; P = 0.023) as the independent factors associated with no-show. Conclusion Monthly analysis showed that the no-show rate and the pattern of medical visits gradually changed in patients with RA during COVID-19 pandemic. Moreover, we found that previous history of no-show and fewer numbers of comorbidities as the independent factors associated with no-show.

OBJECTIVES: We aimed to compare preterm, neurodevelopmentally disordered and healthy full-term children. METHODS: We enrolled 47 children who were born preterm, 40 neurodevelopmentally disordered children, and 80 healthy children as control participants, in order to assess the cognitive functioning and the risk of behavioral problems at the age of 5. Children were assessed using the Korean Wechsler Preschool and Primary Scale of Intelligence-4th edition (K-WPPSI-IV), the Child Behavior Checklist (CBCL), and the Temperament and Character Inventory (TCI). RESULTS: The mean K-WPPSI-IV score of the preterm group was 87.19±17.36, which was significantly higher than that of the neurodevelopmental disorder group (69.98±28.63; p < 0.001) but lower than that of the control group (107.74±14.21; p < 0.001). The cumulative CBCL scores of the preterm children were not significantly different from those of the control group. Additionally, the TCI scores for reward dependence of the preterm children were higher than those of the control group. CONCLUSION: The cognitive performance of preterm infants was lower than that of healthy full-term infants at the age of 5, and there was an association between slower growth and decreased cognitive ability.
Checklist ; Child Behavior ; Child ; Cognition ; Humans ; Infant ; Infant, Newborn ; Infant, Premature ; Neurodevelopmental Disorders ; Problem Behavior ; Reward ; Temperament