Purpose: Food sensitization to egg white (EW) peaks during early childhood, after which some children with sensitization to EW outgrow food sensitization, while others develop an increased degree of sensitization to EW. We investigated factors determining changes in EW-specific IgE in children under 2 years of age. Methods: Among children under 2 years of age with atopic dermatitis or food allergy who visited Asan Medical Center from March 2018 to September 2021, a total of 172 sensitized to EW were enrolled. Serum specific IgE to EW, ovalbumin and ovomucoid, and specific IgG4 to EW and ovomucoid were measured at 0, 6, and 12 months. An increase in EW-specific IgE was defined as an increased level of EW-specific IgE after 12 months from baseline. Multiple logistic regression analysis was performed to identify factors determining an increase in EW-specific IgE. Results: Of the 172 children, 85 had complete data on serum specific IgE and specific IgG4 during a period of 12 months. The levels of EW-specific IgE were decreased in 51 subjects (60.0%), while they were increased in 34 subjects (40.0%). Introduction of baked eggs had a protective effect against an increase in EW-specific IgE levels during a period of 12 months (adjusted odds ratio, 0.148; 95% confidence interval, 0.022–0.983). Conclusion Introduction of the baked egg can prevent an increase in EW-specific IgE during early childhood. Further studies are needed for the long-term effect of baked egg on the natural course of EW sensitization.

Purpose: This study evaluated the clinical effects of heated humidified high flow nasal cannula (HHHFNC) treatment in pediatric patients with respiratory disease and respiratory insufficiency. Methods: We reviewed the medical records for clinical features and tests performed in patients admitted to Chungnam University Hospital pediatric ward and treated with HHHFNC between July 2014 and December 2018. We evaluated the effects of HHHFNC treatment in patients with bronchiolitis treated with oxygen using a nasal prong. Results: The 136 children were treated with HHHFNC during the study period, and their median age was 8 months. Among the 136 patients, 39 (28.7%) were diagnosed with bronchiolitis and pneumonia, 42 (30.9%) with pneumonia, 28 (20.6%) with bronchiolitis, and 3 (2.2%) with epilepsy. Thirty-five patients (25.7%) had underlying neurological disorders. Fifty-one (37.5%) received invasive ventilator treatment. After HHHFNC treatment, venous blood gas analysis showed a pH increase from 7.32 to 7.37 (P<0.05) and a decrease in partial pressure of carbon dioxide (pCO2) from 53.1 to 46.2 mmHg (P<0.05). The respiratory rate had decreased from 46.3 to 43.3/min (P<0.05). There were no statistically significant differences in hospital stay duration or intensive care unit admission rates between bronchiolitis patients receiving HHHFNC treatment and those not receiving. Conclusion In this study, in various diseases leading to pediatric respiratory insufficiency, HHHFNC treatment may improve physiologic parameters at the pediatric ward. HHHFNC may also be effective in patients with underlying neurological disorders and those with respiratory insufficiency from nonrespiratory infectious disease.

Background: A national immunization program (NIP) to prevent disease and reduce mortality from vaccine preventable diseases (VPD) is very important. Methods: We analyzed only the anaphylaxis cases that occurred between 2001 and 2016 that Korea Centers for Disease Control and Prevention (KCDC) determined had a definite causal relationship with a vaccine. The clinical symptoms were assessed according to the Brighton Collaboration case definition (BCCD) level. Results: During the period, there were 13 cases of vaccine-related anaphylaxis. The median age was 9 years (range, 1 month to 59 years). The incidence of anaphylaxis per million doses was 0.090 in 2005, 0.079 in 2012, 0.071 in 2013, 0.188 in 2015, and 0.036 in 2016. Of those cases, 23.1% were influenza vaccines, and 76.9% were BCCD level 2. Epinephrine was used in 46.2%. Conclusion Vaccine-related anaphylaxis seems to have been very rare in the past, but health care professionals must always be aware of anaphylaxis.

Purpose: Sixty to eighty percent of children with egg allergy are able to tolerate eggs in baked form. The purpose of this study was to evaluate the clinical usefulness and diagnostic value of measurements of IgE specific to egg white, ovalbumin, and ovomucoid for reactivity to baked egg in children with sensitivity to egg. Methods: Two hundred seventeen children with suspected egg allergy underwent open food challenges with baked egg (in the form of muffins). The outcomes of the challenges were compared to the serum concentrations of IgE specific to egg white, ovalbumin, and ovomucoid by using ImmunoCAP. Results: There were no statistically significant differences in levels of IgE specific to egg white, ovalbumin, and ovomucoid between the baked egg challenge positive and negative groups younger than 2 years (n = 163). However, significant differences were observed between the challenge positive and negative groups in 54 subjects aged 2 to 5 years (all P < 0.05). The optimal cutoff points of egg white, ovalbumin, and ovomucoid specific IgE levels among children aged 2 to 5 years were 12.40 kU A/L (sensitivity 79%, specificity 66%), 4.07 kU A/L (sensitivity 88%, specificity 58%), and 3.65 kU A/L (sensitivity 77%, specificity 62%), respectively. Conclusion The level of IgE specific to egg white and its components can predict the reactivity to baked egg in children aged 2 to 5years.

PURPOSE: Anticholinergics are a key element in treating neurogenic detrusor overactivity, but only limited data are available in the pediatric population, thus limiting the application to children even for oxybutynin chloride (OC), a prototype drug. This retrospective study was designed to provide data regarding the efficacy, tolerability, and safety of OC in the pediatric population (0-15 years old) with spinal dysraphism (SD). MATERIALS AND METHODS: Records relevant to OC use for neurogenic bladder were gathered and scrutinized from four specialized clinics for pediatric urology. The primary efficacy outcomes were maximal cystometric capacity (MCC) and end filling pressure (EFP). Data on tolerability, compliance, and adverse events (AEs) were also analyzed. RESULTS: Of the 121 patient records analyzed, 41 patients (34%) received OC at less than 5 years of age. The range of prescribed doses varied from 3 to 24 mg/d. The median treatment duration was 19 months (range, 0.3-111 months). Significant improvement of both primary efficacy outcomes was noted following OC treatment. MCC increased about 8% even after adjustment for age-related increases in MCC. Likewise, mean EFP was reduced from 33 to 21 cm H2O. More than 80% of patients showed compliance above 70%, and approximately 50% of patients used OC for more than 1 year. No serious AEs were reported; constipation and facial flushing consisted of the major AEs. CONCLUSIONS: OC is safe and efficacious in treating pediatric neurogenic bladder associated with SD. The drug is also tolerable and the safety profile suggests that adjustment of dosage for age may not be strictly observed.
Adolescent ; Child ; Child, Preschool ; Drug Evaluation/methods ; Female ; Humans ; Infant ; Infant, Newborn ; Male ; Mandelic Acids/adverse effects/*therapeutic use ; Muscarinic Antagonists/adverse effects/*therapeutic use ; Retrospective Studies ; Spinal Dysraphism/*complications ; Treatment Outcome ; Urinary Bladder, Neurogenic/*drug therapy/etiology/physiopathology ; Urological Agents/adverse effects/*therapeutic use

BACKGROUND/AIMS: Thiazolidinediones reduce urinary albumin excretion and may prevent the development of renal injury. We evaluated the long-term effects of rosiglitazone on the progression of renal dysfunction in patients with type 2 diabetes mellitus. METHODS: We enrolled patients with type 2 diabetes mellitus who initially had normal or mildly impaired renal function, defined as an estimated glomerular filtration rate (eGFR) of 60-120 mL/min per 1.73 m2, and normoalbuminuria. Patients were divided into two groups according to their use of rosiglitazone during 3 years of follow-up: those treated with rosiglitazone (rosiglitazone group, n=52) and those treated without rosiglitazone (control group, n=85). Progression of renal dysfunction was defined as a decrease in eGFR of > or =9 mL/min per 1.73 m2 after 3 years. RESULTS: A greater difference was observed in the decrease in eGFR between the rosiglitazone and control groups after 3 years (3.8+/-9.9 vs. 12.6+/-10.5 mL/min per 1.73 m2, p<0.001). Seventeen of 52 (32.7%) patients in the rosiglitazone group and 53 of 85 (62.3%) patients in the control group showed progression of renal dysfunction (p=0.001). The progressors had a longer duration of diabetes (6.7+/-5.9 vs. 3.9+/-4.1 years, p=0.002), higher HbA1c levels (7.4+/-1.8 vs. 6.8+/-1.3%, p=0.023), and less frequent use of rosiglitazone (24.2 vs. 52.2%, p<0.001) compared to non-progressors. Multiple logistic regression analysis revealed that the use of rosiglitazone was a significant and independent predictor of the progression of renal dysfunction. CONCLUSIONS: This study suggests that rosiglitazone theatment slows the progressive deterioration of renal function in patients with type 2 diabetes.
Adult ; Aged ; Diabetes Mellitus, Type 2/*drug therapy/physiopathology ; Diabetic Nephropathies/*prevention & control ; Female ; Glomerular Filtration Rate ; Humans ; Hypoglycemic Agents/*therapeutic use ; Kidney/*physiopathology ; Male ; Middle Aged ; Retrospective Studies ; Thiazolidinediones/*therapeutic use

Pulmonary alveolar proteinosis (PAP) is a rare lung disease characterized by hypoxemic respiratory failure due to the accumulation of lipoproteinaceous material in alveolar macrophages and alveoli. It has been reported that granulocyte macrophage colony-stimulating factor (GM-CSF) inhalation or whole lung lavage significantly improves the disease state. We present a case of 17-year-old female diagnosed with PAP and treated with both GM-CSF inhalation and whole lung lavage. Her symptoms, imaging findings, and pulmonary function tests improved after these treatments. Therefore, combined treatments of whole lung lavage and subsequent GM-CSF inhalation should be considered a treatment option for children and adolescents.

Background: Atopic dermatitis (AD) is a chronic and relapsing inflammatory skin disease mediated by T helper type 2 (Th2) cells in acute phase. Group 2 innate lymphoid cells (ILCs) play a role in the initiation of the Th2 response. Although mold exposure is associated with the development of AD, studies on the underlying mechanisms are lacking. This study investigated whether group 2 ILCs are involved in inflammation in AD-like skin induced by Aspergillus fumigatus (Af). Methods: We investigated changes of group 2 ILCs population in Af-induced AD-like skin lesions. To induce AD-like skin lesions, Af extracts were applied to the dorsal skin of BALB/c and Rag1−/− mice five times per week, with repeat exposures at 2-week intervals. Results: The clinical parameters were higher in the Af-treated group than in the control group. Histologic findings revealed epiderrmal and dermal thickening as well as eosinophil and mast cell infiltration into the skin of Af-treated mice. Populations of group 2 ILCs in the skin were also significantly higher in the Af-treated group. In addition, interleukin-33 mRNA expression was significantly higher in the skin lesions of the Af-treated mice. In the Rag1−/− mice lacking mature lymphocytes, AD-like skin lesions were still induced by Af and ILCs depletion using an anti-CD90.2 mAb lowered the Af-induced inflammatory response. Conclusions Group 2 ILCs may play a role in a murine model of Af-induced AD-like skin lesions.

Background: Atopic dermatitis (AD) is a chronic and relapsing inflammatory skin disease mediated by T helper type 2 (Th2) cells in acute phase. Group 2 innate lymphoid cells (ILCs) play a role in the initiation of the Th2 response. Although mold exposure is associated with the development of AD, studies on the underlying mechanisms are lacking. This study investigated whether group 2 ILCs are involved in inflammation in AD-like skin induced by Aspergillus fumigatus (Af). Methods: We investigated changes of group 2 ILCs population in Af-induced AD-like skin lesions. To induce AD-like skin lesions, Af extracts were applied to the dorsal skin of BALB/c and Rag1−/− mice five times per week, with repeat exposures at 2-week intervals. Results: The clinical parameters were higher in the Af-treated group than in the control group. Histologic findings revealed epiderrmal and dermal thickening as well as eosinophil and mast cell infiltration into the skin of Af-treated mice. Populations of group 2 ILCs in the skin were also significantly higher in the Af-treated group. In addition, interleukin-33 mRNA expression was significantly higher in the skin lesions of the Af-treated mice. In the Rag1−/− mice lacking mature lymphocytes, AD-like skin lesions were still induced by Af and ILCs depletion using an anti-CD90.2 mAb lowered the Af-induced inflammatory response. Conclusions Group 2 ILCs may play a role in a murine model of Af-induced AD-like skin lesions.

Previously, we reported that besides retinal ganglion cell (RGC) spike, there is ~ 10 Hz oscillatory rhythmic activity in local field potential (LFP) in retinal degeneration model, rd1 mice. The more recently identified rd10 mice have a later onset and slower rate of photoreceptor degeneration than the rd1 mice, providing more therapeutic potential. In this study, before adapting rd10 mice as a new animal model for our electrical stimulation study, we investigated electrical characteristics of rd10 mice. From the raw waveform of recording using 8x8 microelectrode array (MEA) from in vitro-whole mount retina, RGC spikes and LFP were isolated by using different filter setting. Fourier transform was performed for detection of frequency of bursting RGC spikes and oscillatory field potential (OFP). In rd1 mice, ~10 Hz rhythmic burst of spontaneous RGC spikes is always phase-locked with the OFP and this phase-locking property is preserved regardless of postnatal ages. However, in rd10 mice, there is a strong phase-locking tendency between the spectral peak of bursting RGC spikes (~5 Hz) and the first peak of OFP (~5 Hz) across different age groups. But this phase-locking property is not robust as in rd1 retina, but maintains for a few seconds. Since rd1 and rd10 retina show phase-locking property at different frequency (~10 Hz vs. ~5 Hz), we expect different response patterns to electrical stimulus between rd1 and rd10 retina. Therefore, to extract optimal stimulation parameters in rd10 retina, first we might define selection criteria for responding rd10 ganglion cells to electrical stimulus.
Animals ; Electric Stimulation ; Fourier Analysis ; Ganglion Cysts ; Humans ; Mice ; Microelectrodes ; Models, Animal ; Patient Selection ; Retina ; Retinal Degeneration ; Retinal Ganglion Cells ; Retinaldehyde