Yong-sung Choi

The molecules of the TNF superfamily and their receptors play crucial roles in the humoral immune response. In view of the powerful effects on germinal center (GC) B cell differentiation, the expression of these molecules should be tightly regulated. In this study, we have undertaken a detailed analysis of the regulation of CD27 expression following the differentiation of GC B cells supported by a follicular dendritic cell line. We show that CD27 is differentially expressed on B cell subpopulati

Selective N-acetylation of (1<i>S</i>,2<i>R</i>)-1-amino-2-indanol by immobilized lipase B from <i>Candida antarctica</i> showed high enantiomeric excess when ethyl acetate was used as the acyl donor in a THF solution. Combining this process with continuous-flow system, we could obtain enantiomerically pure <i>N</i>-acetyl-aminoindanol at a flow rate of 0.1 mL/min (residence time of 64 min). It has been demonstrated to be more efficient compared to the flask mode.

The physicochemical properties and antioxidant activity of a molecule could be improved by the substitution of an oxygen atom in a molecule with selenium. We synthesized selenoflavanones and flavanones to evaluate their neuroprotective effects. The selenoflavanones showed improved physicochemical properties, suggestive of the ability to pass through the blood-brain barrier (BBB). They showed in vitro antioxidant effects against hydrogen peroxide, and did not result in severe cytotoxicity. Moreov

PURPOSE: Pulmonary surfactants for preterm infants contain mostly animal-derived surfactant proteins (SPs), which are essential for lowering surface tension. We prepared artificial pulmonary surfactants using synthetic human SP analogs and performed in vitro and in vivo experiments. MATERIALS AND METHODS: We synthesized peptide analogues that resemble human SP-B (RMLPQLVCRLVLRCSMD) and SP-C (CPVHLKRLLLLLLLLLLLLLLLL). Dipalmitoylphosphatidylcholine (DPPC), phosphatidylglycerol (PG), and palmitic

Necrotizing enterocolitis (NEC) is a devastating condition of hospitalized preterm infants. Numerous studies have attempted to identify the cause of NEC by examining the immunological features associated with pathogenic microorganisms. No single organism has proven responsible for the disease; however, immunological studies are now focused on the microbiome. Recent research has investigated the numerous bacterial species residing in the body and their role in diseases in preterm infants. The tim

Tachypnea duration was shorter with higher Cys C-based eGFR in infants with TTN.

After the transitional period, mCVP values were associated with renal function parameters in VLBWI.

저자 등은 하복부 통증으로 내원한 45세 여자 환자를 통해 난소의 낭성 기형종에서 발생한 원발성 악성 흑생종을 경험하였고, 추척 중에 발생한 이 환자의 다발성 전이를 수술 및 면역 화학 요법을 시행하여 치료 중인 증례를 이에 대한 문헌 고찰과 더불어 보고를 하는 바이다.

Departments of *Pediatrics †Laboratory Medicine, School of Medicine Kyung Hee University, Seoul, Korea The authors declare no conflict of interest.

Introduction: Antenatal steroid improves respiratory distress syndrome in preterm infants. The molecular mechanism of the process is not well established. The aim of this study is to investigate the possible association between antenatal steroid and fetal Forkhead box M1(Foxm1) expression. Materials and methods: An animal study using mated pregnant New Zealand white rabbits and their fetuses was designed. Fourteen mother rabbits were assigned to four groups to undergo a cesarean section. In grou

Neonatal respiratory distress syndrome (RDS) is a condition of pulmonary surfactant insufficiency in the premature newborn. As such, artificial pulmonary surfactant administration is a key treatment. Despite continued improvement in the clinical outcomes of RDS, there are currently no established bedside tools to monitor whether pulmonary surfactant is effectively instilled throughout the lungs. Electrical impedance tomography (EIT) is an emerging technique in which physiological functions are m