Widespread Household Transmission of SARS-CoV-2 B.1.1.529 (Omicron) Variant from Children, South Korea, 2022

The role that children play in the transmission of the omicron variant is unclear. Here we report an outbreak that started in young children attending various pediatric facilities, leading to extensive household transmission that affected 75 families with 88 confirmed case-patients in 3 weeks. Tailored social and public health measures directed towards children and pediatric facilities are warranted with the emergence of highly transmissible omicron variant to mitigate the impact of coronavirus diseases 2019 (COVID-19).

Clinical Correlates and Description Profiles of Antipsychotic Polypharmacy for Patients with Schizophrenia / 신경정신의학

OBJECTIVES: Despite increasing use of antipsychotic polypharmacy (APP), few studies have investigated APP for Korean patients with schizophrenia. The aim of this study was to identify the sociodemographic and clinical correlates and recent prescription profiles of APP in schizophrenia patients. METHODS: A total of 297 schizophrenia patients were recruited and interviewed using standardized assessment instruments in Seoul National Hospital. Differences in demographic and clinical characteristics between APP and antipsychotic monopharmacy (APM) groups were analyzed. The prescriptions of psychotropic drugs were collected by a review of medical records. RESULTS: In comparison with the APM group, the APP group showed association with earlier onset, lower employment rate, and higher scores for Clinical Global Impression-Severity and Brief Psychiatric Rating Scale (BPRS) (p<0.001). In particular, the BPRS positive (p<0.001) and affective symptom scores (p<0.001) of the APP group were higher those of the APM group. The most frequent combination pattern of APP was second generation antipsychotics (SGA)+SGA, followed by SGA+first generation antipsychotics (FGA), and SGA+SGA+FGA. For antipsychotics, it was risperidone+quetiapine, followed by clozapine+risperidone, risperidone+sulpiride, and risperidone+haloperidol. CONCLUSION: The current study suggests that the usage of APP for schizophrenia could be related to symptom severity affected by positive and affective symptoms. The prescription profile reflects that the proportion of atypical antipsychotics on APP has increased.

A Case of Isolated Light Chain Deposition Disease in the Duodenum

Light chain deposition disease (LCDD) is a rare disorder associated with a clonal proliferation of plasma cells, which synthesize abnormal monoclonal immunoglobulin light chains. LCDD is characterized by systemic deposition of light chains in various organs, with the kidneys being most commonly affected. There have been few reports of isolated LCDD. We report a rare case of LCDD limited to a duodenal polyp. A 63-yr-old man visited our hospital for health screening without symptoms in 2009. On gastrofiberscopy, a duodenal polyp was observed. The biopsy showed diffuse infiltration by atypical plasma cells, which were positive for kappa-type light chains by immunohistochemistry. While the patient refused further management, we could find no evidence of recurrence until 2 yr after the initial diagnosis. It has been reported that isolated LCDD has relatively good prognosis compared to systemic LCDD. However, treatment for this disease has not been established yet.

Low-grade lymphoma: Beyond fludarabine-single therapy / 대한혈액학회지

No abstract available.

Recovery of Genes Epigenetically Altered by the Histone Deacetylase Inhibitor Scriptaid and Demethylating Agent 5-Azacytidine in Human Leukemia Cells

Histone deacetylation and demethylation are epigenetic mechanisms implicated in cancer. Studies regarding the role of modulation of gene expression utilizing the histone deacetylase inhibitor scriptaid and the demethylating agent 5-azacytidine in HL-60 leukemia cells have been limited. We studied the possibility of recovering epigenetically silenced genes by scriptaid and 5-azacytidine in human leukemia cells by DNA microarray analysis. The first group was leukemia cells that were cultured with 5-azacytidine. The second group was cultured with scriptaid. The other group was cultured with both agents. Two hundred seventy newly developed genes were expressed after the combination of 5-azacytidine and scriptaid. Twenty-nine genes were unchanged after the combination treatment of 5-azacytidine and scriptaid. Among the 270 genes, 13 genes were differed significantly from the control. HPGD , CPA3, CEACAM6, LOC653907, ETS1, RAB37, PMP22, FST, FOXC1, and CCL2 were up-regulated, and IGLL3, IGLL1, and ASS1 were down-regulated. Eleven genes associated with oncogenesis were found among the differentially expressed genes: ETS1, ASCL2, BTG2, BTG1, SLAMF6, CDKN2D, RRAS, RET, GIPC1, MAGEB, and RGL4. We report the results of our leukemia cell microarray profiles after epigenetic combination therapy with the hope that they are the starting point of selectively targeted epigenetic therapy.

The adaptor protein LAD/TSAd mediates laminin-dependent T cell migration via association with the 67 kDa laminin binding protein

The adaptor protein, LAD/TSAd, plays essential roles in T cell activation. To further understand the functions of this protein, we performed yeast two-hybrid screening using TSAd as bait and identified 67 kDa laminin binding protein (LBP) as the interacting partner. Subsequently, TSAd-LBP interaction was confirmed in D1.1 T cell line. Upon costimulation by T cell receptor (TCR) plus laminin crosslinking or TCR plus integrin alpha6 crosslinking, LBP was coimmunoprecipitated with TSAd. Moreover, TCR plus laminin costimulation-dependent T cell migration was enhanced in D1.1 T cells overexpressing TSAd but was disrupted in D1.1 cells overexpressing dominant negative form of TSAd or TSAd shRNA. These data show that, upon TCR plus integrin costimulation, TSAd associates with LBP and mediates T lymphocyte migration.

Two patients with acquired hemophilia successfully treated with combination therapy including therapeutic plasmapheresis / 대한내과학회지

Acquired hemophilia is a rare disorder associated with fatal bleeding caused by the development of autoantibodies against factor VIII. Here, we report the cases of two young women with acquired hemophilia who presented with massive internal hemorrhage and purpura. Both patients were successfully treated with combination therapy including factor VIII or factor VIII bypassing agent, immunosuppressants, and therapeutic plasmapheresis.

Fibrinogen Yecheon: Congenital Dysfibrinogenemia with Gamma Methionine-310 to Threonine Substitution

This case study reports a rare fibrinogen variant, gamma Met310Thr mutation, for the first time in Korea. The case shows a point mutation from T to C in the 1,007th nucleotide of the FGG gene. This report describes a variant fibrinogen, hereinafter called "fibrinogen Yecheon", using the name after the town where the patient was living at the time of diagnosis. Fibrinogen Yecheon has a de novo heterozygous point mutation of FGG resulting in gamma Met310Thr and subsequent extra N-glycosylation at gamma Asn308. Extra N-glycosylated fibrinogen is considered a main inhibitor of normal fibrinogen activity.

The Relationship of P2Y1 ADP Receptor Polymorphisms and Ischemic Vascular Disease / 대한혈액학회지

BACKGROUND: The platelet ADP receptor P2Y1 plays a key role in platelet aggregation. METHODS: We tested eight sites of P2Y1 and studied the possible link between the presence of P2Y1 polymorphisms and the risk of is chemic vascular disease in a case-control study. The polymorphisms A1622G, C647G and C2259G were selected according to linkage disequilibrium. We evaluated 275 patients with is chemic cerebrovascular disease and 275 control subjects. We also evaluated 171 patients with acute myocardial infarction (AMI), 166 patients with unstable angina (UA), 173 patients with stable angina (SA) and 188 control subjects. RESULTS: For the cerebrovascular disease patients, A1622G AA, AG [odds ratio (OR), 1.170; 95% confidence interval (CI), 0.784 to 1.748] and GG (OR, 1.031; 95% CI, 0.554 to 1.918) did not show any difference between the case and control subjects. C647G CC, CG (OR, 0.995; 95% CI, 0.639 to 1.550) and GG (OR, 1.012; 95% CI, 0.450 to 2.277) did not show any difference between the case and control subjects. C2259G CC, CG (OR, 0.619; 95% CI, 0.354 to 1.082) and GG did not show any difference between the case and control subjects. For coronary artery disease patients, C2259G GG, CG (for AMI patients OR, 0.880, 95% CI, 0.384 to 2.016; for UA patients, OR, 0.885, 95% CI, 0.410 to 1.911; for SA patients, OR, 1.156, 95% CI, 0.534 to 2.501) and CC did not show any difference between AMI, UA and SA patients and each control subject. C647G GG, CG (for AMI patients OR, 1.351, 95% CI, 0.731 to 2.497; for UA patients OR, 1.292, 95% CI, 0.723 to 2.309; for SA patients OR, 0.977, 95% CI, 0.530 to 1.803) and CC (for AMI patients OR, 0.355, 95% CI, 0.093 to 1.358; for UA patients OR, 0.645, 95% CI, 0.205 to 2.028; for SA patients OR, 0.385, 95% CI, 0.113 to 1.311) did not show any difference between AMI, UA and SA patients and each control subject. A1622G AA, AG (for AMI patients OR, 1.416, 95% CI, 0.786 to 2.549; for UA patients OR, 1.079, 95% CI, 0.611 to 1.904; for SA patients OR, 0.958, 95% CI, 0.529 to 1.732) and GG (for AMI patients OR, 0.525, 95% CI, 0.195 to 1.411; for UA patients OR, 0.568, 95% CI, 0.231 to 1.401; for SA patients OR, 0.441, 95% CI, 0.169 to 1.154) did not show any difference between AMI, UA and, SA patients and the control subjects. CONCLUSION: The distribution of P2Y1 polymorphisms did not show any association with ischemic vascular disease.

The Clinical Efficacy of Helicobacter pylori Eradication in Patients with Helicobacter pylori-positive Chronic Thrombocytopenic Purpura / 대한혈액학회지

BACKGROUND: Helicobacter pylori (H. pylori) have been implicated in the pathogenesis of some autoimmune diseases including idiopathic thrombocytopenic purpura (ITP). Several studies have recently shown a high prevalence of H. pylori infection in patients with ITP, and reported platelet recovery after bacterial eradication therapy. The prevalence of H. pylori infection, and the effect of its eradication, in Korean patients with chronic ITP were investigated. METHODS: The study included 35 patients, from 8 hospitals, with chronic ITP. The H. pylori infection was assessed by the urea breath test, rapid urease test or microbial culture. H. pylori eradication was performed with the amoxicillin, clarithromycin and omeprazole regimen for 7 days, or the bismuth, metronidazole and tetracycline regimen for 10 days. Eradication was assessed by urea breath test 4 weeks after treatment. Platelet counts were monitored serially after the end of treatment. RESULTS: Thirty five patients with chronic ITP were evaluated, including 12 males and 23 females, with a median age of 57 years (range 30~79). The median platelet count before eradication was 23,000/microliter (range 4,000~66,000/microliter). Sixteen patients had previously undergone a splenectomy. The H. pylori infection was found in 23 (65%) of the 35 patients. Eradication, was performed in 21 patients, and 6 (28.5%) had a significant increase in their platelet counts after both 2 weeks and 2 months. The median response duration was 7.6 months, ranging from 1~27 months. CONCLUSION: This study confirmed the efficacy of H. pylori eradication in increasing the platelet count in adult chronic ITP patients. The investigation and eradication of H. pylori infection in ITP patients must be considered a simple and inexpensive tool in management of this chronic disease.