Plasma Extracellular Vesicles Derived from Pediatric COVID-19 Patients Modulate Monocyte and T Cell Immune Responses Based on Disease Severity.

Background: The COVID-19 pandemic has caused significant morbidity and mortality globally. The role of plasma-derived extracellular vesicles (EVs) in pediatric COVID-19 patients remains unclear.

Methods: We isolated EVs from healthy controls (n = 13) and pediatric COVID-19 patients (n = 104) with varying severity during acute and convalescent phases using serial ultracentrifugation.

The outcomes of renin-angiotensin-aldosterone system inhibition and immunosuppressive therapy in children with X-linked Alport syndrome.

Background: Alport syndrome (AS) is characterized by progressive kidney disease. There is increasing evidence that renin-angiotensin-aldosterone system (RAAS) inhibition delays chronic kidney disease (CKD) while the effectiveness of immunosuppressive (IS) therapy in AS is still uncertain. In this study, we aimed to analyze the outcomes of pediatric patients with X-linked AS (XLAS) who received RAAS inhibitors and IS therapy.

COL4A3 mutation is an independent risk factor for poor prognosis in children with Alport syndrome.

Background: Alport syndrome (AS) is an inherited glomerular disease caused by mutations in COL4A3, COL4A4, or COL4A5. Associations between clinical manifestations and genotype are not yet well defined. Our study aimed to define clinical and genetic characteristics, establish genotype-phenotype correlations, and determine prognosis of AS in children.

A case of Type 1 Dent disease presenting with isolated persistent proteinuria.

Dent disease is a rare X-linked recessive tubular disorder, characterized by the triad of low molecular-weight proteinuria, hypercalciuria, nephrocalcinosis and/or nephrolithiasis. It is caused by mutations in the gene or gene. Thirty to 80% of affected males develop end-stage kidney disease between the ages of 30 and 50 years.

Gastric duplication cyst in an infant with Finnish-type congenital nephrotic syndrome: concurrence or coincidence?

Congenital nephrotic syndrome (CNS) is a rare disorder characterized by massive proteinuria and marked edema manifesting in utero or during the first 3 months of life. CNS can be caused by congenital infections, allo-immune maternal disease or due to the genetic defects of podocyte proteins most commonly NPHS1. Here we present a case of Finnish-type congenital nephrotic syndrome along with feeding problems and abdominal distention which was diagnosed during follow-up as a gastric-duplication cyst with a novel mutation in the nephrin gene.

CD80 expression and infiltrating regulatory T cells in idiopathic nephrotic syndrome of childhood.

Background: CD80 (also known as B7-1) is a co-stimulatory molecule that is expressed in biopsies and also excreted in urine in patients with minimal change disease (MCD) and focal segmental glomerulosclerosis (FSGS). CD80 is inhibited by the cytotoxic T-lymphocyte-associated-antigen 4 (CTLA4), which is mainly expressed on regulatory T cells (Tregs). Ineffective circulating Treg response is involved in the pathogenesis of nephrotic syndrome.

A retrospective analysis of children with Henoch-Schonlein purpura and re-evaluation of renal pathologies using Oxford classification.

Background: Henoch-Schönlein purpura (HSP) is the most common vasculitis in childhood. The long-term prognosis is variable and depends on renal involvement. The aims of this study were to investigate the clinical and laboratory characteristics of our HSP patients, to identify the risk factors for the development of Henoch-Schönlein purpura nephritis (HSPN) and to assess the efficacy of the Oxford Classification system for predicting renal outcomes.

MEFV gene mutations in children with Henoch-Schönlein purpura and their correlations-do mutations matter?

Objective: To explore the frequency of MEFV gene mutations in children with Henoch-Schönlein purpura who had no prior familial Mediterranean fever diagnosis and to evaluate the association of MEFV mutations with the clinical and laboratory features of Henoch-Schönlein purpura.

Methods: Data of 1120 patients diagnosed with Henoch-Schönlein purpura were reviewed retrospectively. The spectrum and degree of organ involvement and acute phase reactant levels were documented for each patient.

Value of renal pelvic diameter and urinary tract dilation classification in the prediction of urinary tract anomaly.

Background: The aim of this study was to identify the cut-offs of postnatal anteroposterior renal pelvic diameter (APRPD), according to the urinary tract dilation (UTD) classification system, to identify the predictors of final diagnosis of UTD and the need for surgery.

Methods: A total of 260 infants (336 renal units) with prenatally detected UTD were prospectively evaluated on serial ultrasonography by the same radiologist. Additional voiding cystourethrography and scintigraphy was done according to the clinical algorithm.

Retrospective analysis of simple and stage II renal cysts: Pediatric nephrology point of view.

Background: Increased ultrasonography (US) use has been correlated with an increased incidence of pediatric renal cysts. For simple and stage II cysts, the malignancy risk is low in adulthood, no follow up is recommended; but there is no consensus on childhood management. Given that pediatric renal cysts may be manifestations of hereditary cystic diseases, a different approach and follow up should be taken for these patients.

Mucolipidosis Type III: A Rare Disease in Differential Diagnosis of Joint Stiffness in Pediatric Rheumatology.

Mucolipidoses are metabolic disorders with autosomal recessive inheritance caused by deficiency of N-acetylglucosamine- 1-phosphotransferase leading to accumulation of glycosaminoglycans and sphingolipids intracellularly. The differential diagnosis of mucolipidosis II or III is based on the age of onset, clinical findings and degree of severity. In this article, we present four pediatric patients with mucolipidosis III or pseudo-Hurler polydystrophy who admitted to our hospital with joint stiffness.

Canakinumab treatment in children with familial Mediterranean fever: report from a single center.

Familial Mediterranean fever (FMF), the most common hereditary autoinflammatory disorder is characterized by recurrent episodes of fever, serositis, arthritis. The major long-term result is amyloidosis. Colchicine remains the principle of the treatment; it not only prevents the acute attacks but also prevents the long-term complications such as amyloidosis; 5-10% of the patients are unresponsive to treatment.

Publisher Correction: Evaluation of the level of dynamic thiol/disulphide homeostasis in adolescent patients with newly diagnosed primary hypertension.

Owing to an error in typesetting, the name of the author Atilla Halil Elhan was rendered wrongly. The original publication has now been corrected in this respect.

Evaluation of the level of dynamic thiol/disulphide homeostasis in adolescent patients with newly diagnosed primary hypertension.

Background: Thiol/disulphide homeostasis plays a critical role in numerous intracellular enzymatic pathways including antioxidant defense and detoxification. This study was designed to investigate the impact of thiol/disulfide homeostasis in adolescent patients with recently diagnosed primary hypertension (HT) using a novel and automated method.

Methods: Native thiol/disulphide levels were measured by a novel spectrophotometric method (Cobasc 501, Roche Diagnostics, Mannheim, Germany) in 30 patients with primary HT together with 30 healthy controls.

A girl with Henoch Schönlein purpura associated with acute rheumatic fever and review of literature.

Aypar E, Demirtaş D, Aykan HH, Kara-Eroğlu F, Düzova A. A girl with Henoch Schönlein purpura associated with acute rheumatic fever and review of literature. Turk J Pediatr 2018; 60: 576-580.

Type I IFN-related NETosis in ataxia telangiectasia and Artemis deficiency.

Background: Pathological inflammatory syndromes of unknown etiology are commonly observed in ataxia telangiectasia (AT) and Artemis deficiency. Similar inflammatory manifestations also exist in patients with STING-associated vasculopathy in infancy (SAVI).

Objective: We sought to test the hypothesis that the inflammation-associated manifestations observed in patients with AT and Artemis deficiency stem from increased type I IFN signature leading to neutrophil-mediated pathological damage.

Molecular analysis of the AGXT gene in patients suspected with hyperoxaluria type 1 and three novel mutations from Turkey.

Primary hyperoxaluria type 1 (PH1) is a rare, autosomal recessive disease, caused by the defect of AGXT gene encoding hepatic peroxisomal alanine glyoxylateaminotransferase (AGT). This enzyme is responsible for the conversion of glyoxylate to glycine. The diagnosis of PH1 should be suspected in infants and children with nephrocalcinosis or nephrolithiasis.

Genetic and clinical features of cryopyrin-associated periodic syndromes in Turkish children.

Objectives: The aim of this study was to present the genetic and clinical data of the largest cohort of Turkish cryopyrin-associated periodic syndromes (CAPS) patients.

Methods: This is a two-centre descriptive study of Turkish children with clinical diagnosis of CAPS. NLRP3 analyses were performed by Sanger sequencing and by massively parallel sequencing.

Periodic Fever, Aphthosis, Pharyngitis, and Adenitis Syndrome: Analysis of Patients From Two Geographic Areas.

Objective: Periodic fever, aphthosis, pharyngitis, and adenitis (PFAPA) syndrome is a periodic fever syndrome of childhood with an unknown etiology. Our aim was to compare the features between PFAPA syndrome patients from Turkey and those from the US, and patients with and without MEFV variants, and to test the performance of the Eurofever criteria in excluding other autoinflammatory disorders.

Methods: Seventy-one children with PFAPA syndrome, followed in Hacettepe University, in Ankara, Turkey, and 60 patients at Boston Children's Hospital in the US were enrolled.

Pediatric-onset adult type sarcoidosis: A case report.

Sarcoidosis, a multisystem disorder of unknown etiology that involves multiple organs, is rare in children. The true incidence and prevalence of childhood sarcoidosis is unknown. As in adults, many children with sarcoidosis may be asymptomatic; the disease may remain undiagnosed.

Failure to thrive, interstitial lung disease, and progressive digital necrosis with onset in infancy.

Key teaching points • SAVI is a recently described interferonopathy resulting from constitutive action of STING and up-regulation of IFN-β signaling. • SAVI is characterized by facial erythema with telangiectasia, acral/cold-sensitive tissue ulceration and amputations, and interstitial lung disease. It has overlapping features with Aicardi-Goutières syndrome and familial chilblain lupus.

Treatment of colchicine-resistant Familial Mediterranean fever in children and adolescents.

Familial Mediterranean fever (FMF) is the most common autoinflammatory disease worldwide. Approximately 5-10 % of patients are unresponsive to colchicine. Aim of this study was to determine the short- and long-term efficacy and safety of anti-interleukin 1 (anti-IL1) and anti-tumor necrosis factor agents in colchicine-resistant FMF cases in Turkish children and adolescents.