Inflammatory Markers In Children Research Articles

Serum Inflammatory Markers in Children with Severe Acute Malnutrition with Systemic Infections: A Case–Control Study

Serum Inflammatory Markers in Children with Severe Acute Malnutrition with Systemic Infections: A Case–Control Study

Cardiac assessment and inflammatory markers in children with paediatric inflammatory multisystem syndrome temporally associated with SARS-CoV2 (PIMS-TS) treated with methylprednisolone versus intravenous immunoglobulins: 6-month follow-up outcomes of the randomised controlled Swissped RECOVERY trial

Previous findings from the Swissped RECOVERY trial showed that patients with Pediatric Inflammatory Multisystem Syndrome-Temporally Associated with SARS-CoV-2 (PIMS-TS) who were randomly assigned to intravenous immunoglobulins or methylprednisolone have a comparable length of hospital stay. Here, we report the 6-month follow-up outcomes of cardiac pathologies and normalisation of clinical or laboratory signs of inflammation from this study population. This pre-planned follow-up of patients with PIMS-TS included the Swissped RECOVERY Trial reports on the 6-month outcomes of the cohort after randomisation, with a focus on cardiac, haematological, and biochemical findings. The trial was an investigator-initiated randomised multicentre open-label two-arm trial in children and adolescents hospitalised with PIMS-TS at ten hospitals in Switzerland. Cardiological assessments and laboratory analyses were prospectively collected in the intention-to-treat analysis on pre-defined intervals after hospital discharge. Differences between randomised arms were investigated using Chi-square test for categorical and Wilcoxon test for continuous variables. The trial is registered with the Swiss National Clinical Trials Portal (SNCTP000004720) and ClinicalTrials.gov (NCT04826588). Between May 21, 2021 and April 15, 2022, 75 patients with a median age of 9.1 years (IQR 6.2-12.2) were included in the intention-to-treat population (37 in the methylprednisolone group and 38 in the intravenous immunoglobulin group). During follow-up, the incidence of abnormal left ventricular systolic function, coronary artery aneurysms (CAA), and other signs of inflammation were comparable in both groups. However, we detected cardiac abnormalities with low incidence and a mild degree grade of pathology. CAAs were observed in 2/38 children (5.3%) in the IVIG group and 1/37 children (2.7%) in the methylprednisolone group at 6-month follow-up (difference proportion 0.75; 95% confidence interval (CI)-0.05 to 1.0; p=0.39). Methylprednisolone alone may be an acceptable first-line treatment as left ventricular systolic dysfunction and clinical/laboratory evidence for inflammation quickly resolved in all children. However, our findings need further confirmation through larger studies as our sample size is likely to be of insufficient power to address rare clinically relevant adverse outcomes. NOMIS, Vontobel, and Gaydoul Foundation.

Replacing screen time, with physical activity and sleep time: influence on cardiovascular indicators and inflammatory markers in Brazilian children

ObjectiveTo examine if the substitution of different screen time intervals with light physical activity (LPA), moderate to vigorous physical activity (MVPA) and sleep is associated with cardiovascular indicators and inflammatory markers in children. MethodsThis is a cross-sectional study developed with 186 children aged between six and 11 years old from public schools in southern Brazil. CRF was measured with the 6-minute running and walking test, following the Brazil Sports Project procedures. The percentage of fat was evaluated through DXA. LPA and MVPA were measured using accelerometers. Sleep and screen time were assessed by questionnaires answered by parents. Leptin and C-reactive protein were measured by fasting blood collection. Systolic and diastolic blood pressure were determined through a digital sphygmomanometer. Isotemporal substitution models were used for statistical analysis. ResultsReplacing 1 h of screen time with MVPA was associated with lower BMI, systolic and diastolic blood pressure, fat percentage, leptin, and C-reactive protein. When screen time was substituted for sleep time, lower waist circumference was observed. Regarding the substitution of 1 h of screen time with LPA, significant values were found only for leptin. ConclusionThe replacement of screen time with physical activities of different intensities and sleep time was associated with benefits in cardiovascular indicators and inflammatory markers in childhood.

The Role of Neighborhood Disadvantage, Systemic Inflammation, and Acute Chest Syndrome in Children with Sickle Cell Disease

Introduction: Acute chest syndrome (ACS) is a frequent pulmonary complication of sickle cell disease (SCD) and is a leading cause of morbidity and mortality in both children and adults with SCD. In addition to biological factors, there is increasing recognition that social and environmental factors, such as low socioeconomic status and air pollution, respectively, play a role in disease processes. Current evidence suggests that neighborhood disadvantage influences cardiopulmonary outcomes in non-SCD populations. The disproportionate presence of polluting industries and major roadways near disadvantaged neighborhoods could impact lung health in children with SCD, and exposure to toxic metals has also been linked to worsening systemic inflammation. Yet, the impact of neighborhood disadvantage on inflammation in ACS has not been assessed. The goal of this study is to investigate the effects of neighborhood disadvantage on inflammatory markers in children presenting with ACS. Methods: We enrolled children in our institution with SCD (all genotypes) aged 2-21 years of age with and without a history of ACS. We abstracted clinical information including sex, age, number of ACS episodes up to enrollment, and residential address. In addition, blood samples were collected during routine hematology appointments and hospitalizations for ACS. Plasma cytokine levels were measured using multiplex assays on a subset of participants. Using census tract-level data on poverty, education, housing and employment from the US Census, we computed the area deprivation index (ADI) for census tracts across the greater Houston area and assigned an ADI score to each study subject based on their geocoded address at the time of visit. We dichotomized ADI at the median value (99.0; minimum 42.4, maximum of 156.5) across the study area into “high” and “low” deprivation categories. Results: Forty-four participants met inclusion criteria with complete ADI, clinical and cytokine data. Mean age was 11.6 years (SD 5.1), 52% were male, and 66% lived in a high ADI tract. In children over 10 years of age (n=24), there were higher levels of IL-4, IL-6, IL-8, and IL-13 in those from high ADI areas compared to those from low ADI areas [median concentrations (pg/mL): 139.2 vs 75.7, p=0.53; 17.18 vs 11.92, p=0.67; 15.85 vs 5.38, p=0.20; 19.28 vs 8.30, p=0.38, respectively]. Similarly, IL-4, IL-6, and IL-13 levels were higher in children 10 years and younger from high ADI areas, though not statistically significant. There were no differences between median ADI for patients without a history of ACS and those with recurrent ACS (107.7 vs 108.1, p=0.9). Conclusion: In Houston children with SCD, especially 10 years and older, there were overall higher levels of systemic inflammation in those from high ADI areas compared to those from low ADI areas. However, these findings did not reach statistical significance. There was also no significant difference in ADI scores based on frequency of admissions for ACS. Future studies are needed to analyze cytokines from a larger cohort of patients with SCD and compare ACS outcomes to other regions for a more powered, comprehensive investigation.

Glucose indices as inflammatory markers in children with acute surgical abdomen: a cross-sectional study

Background Glycaemic dysregulation potentiates the pro-inflammatory response and increases oxidative injury; therefore, preoperative hyperglycaemia is linked to increased mortalities. In addition, inflammation is accompanied by higher glycated haemoglobin (HbA1c) levels, and the relationship between this and random blood sugar (RBS) could be non-linear. Methods This is a cross-sectional study. Non-diabetic paediatric patients with acute surgical abdomen, presenting to the emergency surgical services were enrolled, over a period of 6 months. They were all screened for their random blood sugar and HbA1c levels. Results Fifty-three cases were studied. The prevalence of glycaemic dysregulation in the enrolled children was high. Abnormal HbA1c was observed in 66% of the study group. Stress hyperglycaemia was observed in 60% of the enrolled children. There was a significant correlation (r = 0.770, p-value: < 0.001) between RBS and the total leucocytic count (TLC). The TLC cutoff value for predicting stress hyperglycaemia was 13,595 cells/mm3. The cutoff value of RBS for predicting leukocytosis was 111.5 mg/dl. Median RBS level was significantly higher in complicated appendicitis (169.5 mg/dl), compared to uncomplicated appendicitis (118.0 mg/dl). Conclusion HbA1c and RBS could be used as inflammatory markers for surgical acute abdomen and its degree of severity, respectively. HbA1c rises in a considerable number of cases with surgical acute abdomen, irrespective of the disease stage. However, as the disease progresses, the random blood sugar rises due to stress hyperglycaemia, thus becoming a surrogate inflammatory marker.

Evaluation of Salivary Glands by Ultrasonography and Inflammatory Markers in Children with Autoimmune Thyroiditis

Evaluation of Salivary Glands by Ultrasonography and Inflammatory Markers in Children with Autoimmune Thyroiditis

Impact of vitamin D deficiency on the severity of COVID 19 infection in pediatrics: a cross-sectional study

BackgroundVitamin D has immunomodulating actions which have a major role in the regulation of the inflammatory response. In this study, we aimed to determine the presence of an association between the serum level of vitamin D (25 OH vitamin D) and the severity of symptoms and outcomes in children with COVID-19.ResultsFifty-six children who were diagnosed to have COVID-19 were selected for our study. The demographic data and clinical and laboratory parameters including vit. D serum levels were also collected. According to the WHO guidelines in COVID-19 clinical severity, only hospitalized cases will be included in this study and classified into the (1) moderate group (patients in whom pneumonia was confirmed by physical examination and radiographic imaging with or without oxygen need) and (2) severe group (consisted of hospitalized patients who need positive respiratory support). Our study found a statistically significant difference regarding vitamin D deficiency with more deficient serum levels in the severe group; also, we found a negative correlation between serum vitamin D level and the inflammatory markers in children and adolescents with COVID-19.ConclusionsThis study confirms that there is a strong relationship between vit. D deficiency and COVID-19 clinical severity and outcomes in PICU-admitted pediatric population.

Monocyte anisocytosis corresponds with increasing severity of COVID-19 in children.

Although SARS-CoV-2 infection can lead to severe COVID-19 in children, the role of biomarkers for assessing the risk of progression to severe disease is not well established in the pediatric population. Given the differences in monocyte signatures associated with worsening COVID-19 in adults, we aimed to determine whether monocyte anisocytosis early in the infectious course would correspond with increasing severity of COVID-19 in children. We performed a multicenter retrospective study of 215 children with SARS-CoV-2 infection, Multisystem Inflammatory Syndrome in Children (MIS-C), convalescent COVID-19, and healthy age-matched controls to determine whether monocyte anisocytosis, quantified by monocyte distribution width (MDW) on complete blood count, was associated with increasing severity of COVID-19. We performed exploratory analyses to identify other hematologic parameters in the inflammatory signature of pediatric SARS-CoV-2 infection and determine the most effective combination of markers for assessing COVID-19 severity in children. Monocyte anisocytosis increases with COVID-19 severity and need for hospitalization. Although other inflammatory markers such as lymphocyte count, neutrophil/lymphocyte ratio, C-reactive protein, and cytokines correlate with disease severity, these parameters were not as sensitive as MDW for identifying severe disease in children. An MDW threshold of 23 offers a sensitive marker for severe pediatric COVID-19, with improved accuracy when assessed in combination with other hematologic parameters. Monocyte anisocytosis corresponds with shifting hematologic profiles and inflammatory markers in children with COVID-19, and MDW serves as a clinically accessible biomarker for severe COVID-19 in children.

Longitudinal reallocations of time between 24-h movement behaviours and their associations with inflammation in children and adolescents: the UP&DOWN study

BackgroundWhile there is evidence that physical activity, sedentary behaviour (SB) and sleep may all be associated with modified levels of inflammatory markers in adolescents and children, associations with one movement behaviour have not always been adjusted for other movement behaviours, and few studies have considered all movement behaviours in the 24-hour day as an exposure.PurposeThe aim of the study was to explore how longitudinal reallocations of time between moderate-to-vigorous physical activity (MVPA), light physical activity (LPA), SB and sleep are associated with changes in inflammatory markers in children and adolescents.MethodsA total of 296 children/adolescents participated in a prospective cohort study with a 3-year follow-up. MVPA, LPA and SB were assessed by accelerometers. Sleep duration was assessed using the Health Behavior in School-aged Children questionnaire. Longitudinal compositional regression models were used to explore how reallocations of time between movement behaviours are associated with changes in inflammatory markers.ResultsReallocations of time from SB to sleep were associated with increases in C3 levels (difference for 60 min/d reallocation [d60] = 5.29 mg/dl; 95% confidence interval [CI] = 0.28, 10.29) and TNF-α (d60 = 1.81 mg/dl; 95% CI = 0.79, 15.41) levels. Reallocations from LPA to sleep were also associated with increases in C3 levels (d60 = 8.10 mg/dl; 95% CI = 0.79, 15.41). Reallocations from LPA to any of the remaining time-use components were associated with increases in C4 levels (d60 ranging from 2.54 to 3.63 mg/dl; p < 0.05), while any reallocation of time away from MVPA was associated with unfavourable changes in leptin (d60 ranging from 3088.44 to 3448.07 pg/ml; p < 0.05).ConclusionsReallocations of time between 24-h movement behaviours are prospectively associated with some inflammatory markers. Reallocating time away from LPA appears to be most consistently unfavourably associated with inflammatory markers. Given that higher levels of inflammation during childhood and adolescence are associated with an increased risk of chronic diseases in adulthood, children and adolescents should be encouraged to maintain or increase the level of LPA to preserve a healthy immune system.

Inflammatory markers in children with obstructive sleep apnea syndrome.

To evaluate serum inflammatory markers of YKL-40, Interleukin-6 (IL-6), Interleukin-8(IL-8), Interleukin-10(IL-10), TNF-α(tumor necrosis factor-α), and CRP (C-reactive protein) in children with and without OSAS. The ELISA technique has been used to identify the concentration of inflammatory markers such as YKL-40, IL-6, IL-8, IL-10, TNF-α, and CRP in the serum of 83 children with OSAS and 83 children without OSAS. Serum levels of YKL-40, IL-6, IL-8, and IL-10 were found to be increased in children with OSAS. YKL-40 was found to be positively correlated with IL-6 and IL-8, and negatively correlated with IL-10. At the same time,YKL-40 was also found to be positively correlated with OAHI and LoSpO2% in OSAS group. IL-8 was positively correlated with OAHI whereas IL-10 was positively correlated with LoSpO2. Children with OSAS are in a systemic inflammatory state. YKL-40 together with IL-8 may act as serum inflammatory markers and provide an indication for the diagnosis of children with OSAS.

Adjunctive nano-curcumin therapy improves inflammatory and clinical indices in children with cystic fibrosis: A randomized clinical trial.

Inflammation may develop due to internal dysfunction of the cystic fibrosis transmembrane conductance regulator (CFTR) protein or external factors in patients with cystic fibrosis (CF). This prospective randomized clinical trial aimed to ascertain the effects of nano-curcumin as an anti-inflammatory agent and a CFTR modulator on clinical and inflammatory markers in children with CF. Children with CF were randomly assigned to receive daily curcumin or a placebo for 3 months. The primary outcome measure was to evaluate inflammatory indices, nasopharyngeal swab analysis, and clinical assessments via spirometry, anthropometric measurements, and quality of life (QOL) analysis. Sixty children were included. Intra-group changes comparison showed that curcumin decreased the level of high-sensitivity C-reactive protein (hs-CRP) (median: -0.31 mg/L, IQR: -1.53 to 0.81; p=.01) and fecal calprotectin level (-29 μg/g, -57.5 to 11.5; p=.03), also increased the level of interleukin (IL)-10 (6.1pg/mL, 4.5-9; p=.01). Moreover, curcumin improved the overall QOL and the subscales of the questionnaire. Inter-group changes comparison depicted the number of Pseudomonas colonies reduced by about 52% in the curcumin group and gained weight by about 16% (p > .05). Nano-curcumin seems to be considered as an effective nutritional supplement on hs-CRP, IL-10, fecal calprotectin levels, and improving QOL in patients with CF.

140 Lung function and airway inflammatory markers in children with cystic fibrosis transmembrane conductance regulator–related metabolic syndrome

140 Lung function and airway inflammatory markers in children with cystic fibrosis transmembrane conductance regulator–related metabolic syndrome

The Etiology of Community-Acquired Pneumonia Correlates with Serum Inflammatory Markers in Children.

Community-acquired pneumonia (CAP) severely affects pediatric hospitalizations. This study assessed the contribution of CAP to hospitalizations, its etiology in relationship with age, and the inflammatory markers. Between 2013 and 2018, 1064 CAP patients were hospitalized and diagnosed with bacterial/possibly bacterial pneumonia (BP), viral/possibly viral pneumonia (VP) and atypical pneumonia (AP). The etiology was confirmed using blood/pleural fluid culture/polymerase chain reaction (PCR), rapid antigen test/PCR in nasopharyngeal swabs, or serological studies. CAP accounted for 9.9% of hospitalizations and 14.8% of patient days. BP was diagnosed in 825 (77.5%), VP in 190 (17.9%), and AP in 49 (4.6%) cases; the confirmed etiology (n = 209; 20%) included mostly influenza (39%; n = 82), respiratory syncytial virus (RSV, 35%; n = 72), and Mycoplasma pneumoniae (19%; n = 39). VP frequency decreased with age (41% in < 3 mo to 9% in ≥ 60 mo), in contrast to AP (13% in ≥ 60 mo). Among the analyzed parameters, the best differentiating potential was shown by: C-reactive protein (CRP, AUCBP-VP = 0.675; 95% CI: 0.634–0.715), procalcitonin (AUCBP-AP = 0.73; 95% CI: 0.67–0.794), and CRP/procalcitonin (AUCAP-VP = 0.752; 95% CI: 0.67–0.83); a good positive predictive value (88.8%, 98.3%, and 91.6%, respectively) but a low negative predictive value (29.5%, 13.1%, and 40.7%, respectively) was observed. CAP influences hospital patient days more than the crude number of patients would suggest. On a clinical basis, BP is mainly recognized, although viral pneumonia is confirmed most often. RSV and influenza are responsible for a huge percentage of hospitalized cases, as well as M. pneumoniae in children aged ≥ 5 years. Serum inflammatory markers may help differentiate etiological factors.

GlycA but not CRP is an inflammatory biomarker of longitudinal changes in BMI and adiposity in adolescents with obesity

Background and Aims : We aimed to investigate relationships between adiposity measures and inflammatory markers in children and adolescents with obesity, and whether changes in adiposity measures were associated with change in inflammation over time.

Effect of Vagus Nerve Stimulation on Blood Inflammatory Markers in Children with Drug-Resistant Epilepsy: A Pilot Study.

Background: Since one of the suggested mechanisms of action of VNS on epilepsy is the reduction of central inflammation, we carried out a comprehensive analysis of blood inflammatory markers in children considered for VNS surgery. Materials and methods: Five pediatric patients were studied. An extensive analysis of blood inflammatory markers was performed before surgery (T0) and six weeks after VNS implantation (T1). An epileptological outcome was obtained according to the McHugh score. Results: The variations of IgA, IgE, IgG, CD19, and PTX3 displayed a tendency toward a positive statistical correlation between T0 and T1. According to McHugh score, the patients were divided into Group 1 (i.e., Class I) and Group 2 (i.e., Classes II and III). IL-1β and PTX-3 tended to decrease more in Group 1, while TNF-α decreased in Group 2 (−56.65%) and slightly increased (+3.61%) in Group 1 at T1 without statistical correlation. Conclusions: The variation of IL-1β and PTX-3 seem to be related to a better outcome; thus, they do not reach statistical significance. A larger series of patients is needed to determine whether biochemical changes could relay with the clinical improvement of epilepsy.

Erythrocyte sedimentation rate and C-reactive protein as inflammatory markers in children with attention –deficit hyperactivity disorder

Erythrocyte sedimentation rate and C-reactive protein as inflammatory markers in children with attention –deficit hyperactivity disorder

The Relationship of Leukocyte and Neutrophil Count, C-Reactive Protein, and Erythrocyte Sedimentation Rate With the Severity of Childhood Pneumonia Without Conjugated Pneumococcal Vaccine Use

Background: Pneumonia is one of the leading causes of diseases in children that remains a serious threat. This study aimed to investigate the laboratory and inflammatory markers in children with pneumonia and their relationship with the severity of the disease. Materials and Methods: This retrospective descriptive-cross-sectional study included 400 children with pneumonia patients, aged 1 month to 12 years, who were referred to Bandar Abbass Children’s Hospital. In this study, the severity of the disease was compared with variables such as age, gender, white blood cell (WBC) count, neutrophil percentage, erythrocyte sedimentation rate (ESR), and community-acquired pneumonia (CAP). Results: Of the 400 people who participated in the survey, 57.5% and 42.5% of cases were males and females, respectively. The mean age of the studied patients was 16.53±21.57 months. There was no significant relationship between the severity of pneumonia and leukocyte count, neutrophil count, and inflammatory markers (P&gt;0.05). Conclusion: Based on the findings, the severity of the disease was mild to moderate in 90% of patients. ESR, C-reactive protein (CRP), leukocyte count, and neutrophil count were not significantly associated with the severity of pneumonia in children (P&gt;0.05).

The impact of single dose intravenous dexamethasone as an adjunctive therapy for primary treatment on concentrations of inflammatory biomarkers in children with Kawasaki disease

Purpose: This study was performed to investigate the impact of single dose dexamethasone as an adjunctive therapy for primary treatment on values of inflammatory markers in children with Kawasaki disease (KD).Methods:We investigated inflammatory markers, including white blood cells, erythrocyte sedimentation rate, C-reactive protein (CRP), interleukin (IL)-6, and IL-10 in 42 children with complete KD who were hospitalized in the Kyungpook National University Children’s Hospital from March 2016 through April 2017. The children underwent primary treatment for KD with intravenous immunoglobulin (IVIG) and/or dexamethasone. They were divided into 2 groups according to the use of dexamethasone. To assess the change in values of inflammatory markers, the blood was drawn twice from each child; before and 24 hours after the administration of IVIG.Results: Of the 42 study children, 18 and 24 were classified as the dexamethasone and control groups, respectively. No significant differences were found between the 2 groups in terms of the length of hospital stay, duration of fever, and time required for IVIG administration. In both groups, white blood cells, CRP, IL-6, and IL-10 significantly decreased after the primary therapy. The delta scores of CRP, IL-6, and IL-10 were higher in the dexamethasone group (P = 0.015, P = 0.001, and P = 0.002, respectively). No coronary artery abnormalities were found in both groups.Conclusion: This study suggests an anti-inflammatory effect of single dose dexamethasone as an adjunctive therapy for primary treatment in children with KD without shortening the duration of fever and the length of hospital stay.

Effects of Physical Exercise on Cardiometabolic Biomarkers and Inflammatory Markers in Children: A Systematic Review and Meta-Analysis of Randomized Controlled Trials.

The prevalence of obesity among children as well as the beneficial effects of physical exercise (PE) on weight loss has been determined by modulating the secretory factors of adipose tissue. PE has also been shown to have beneficial effects on obesity. The objective of this systematic review and meta-analysis was to investigate the effects of physical exercise (PE) on adiponectin and other important health markers in children. We searched 6 electronic databases (PubMed/Medline, Embase, Cochrane Library, Cinahl, Scopus, and Web of Science) and Google Scholar for randomized controlled trials from inception to December 15, 2021. We used random-effects models to estimate weighted mean difference (WMD) with 95% confidence intervals (CI). Fourteen studies were included (N = 468 participants; mean age: 14 years). In general, PE increased adiponectin (WMD: 0.91µg/mL; 95% CI, 0.27 to 1.55, p = 0.005), high-density lipoprotein cholesterol (HDL-C) (WMD: 1.01mg/dL; 95% CI, 0.33 to 1.69, p = 0.004), and VO2max (WMD: 2.52mL.kg.min; 95% CI, 1.41 to 3.62, p = 0.00,001). The levels of c-reactive protein (WMD: -0.37mg/L; 95% CI, -0.57 to -0.17, p = 0.0003), insulin (WMD: -4.61μIU/ml; 95% CI, -5.46 to -3.76, p = 0.00,001), fasting glucose (WMD: -5.11mg/dL; 95% CI, -7.88 to -2.34, p = 0.0003), and insulin resistance index (WMD: -1.44; 95% CI, -1.92 to -0.96, p = 0.00,001), decreased significantly. Our study showed that PE may increase the level of adiponectin, HDL-C, and VO2max in children.

Urinary Protein Array Analysis to Identify Key Inflammatory Markers in Children with IgA Vasculitis Nephritis.

Chronic kidney disease is a recognised complication of immunoglobulin A vasculitis, (IgAV; formerly Henoch–Schonlein purpura—HSP). The pathophysiology of IgAV and why some patients develop significant renal involvement remains largely unknown. Identifying urinary inflammatory markers could direct targets for earlier intervention. The aim of this cross-sectional exploratory study was to perform a large protein array analysis to identify urinary markers to provide insight into the mechanisms of kidney inflammation in children with established IgAV nephritis (IgAVN). Determination of the relative levels of 124 key proteins was performed using commercially available proteome profiler array kits. Twelve children were recruited: IgAVN, n = 4; IgAV without nephritis (IgAVwoN), n = 4; healthy controls (HCs), n = 4. The urinary concentrations of twenty proteins were significantly different in IgAVN compared to IgAVwoN. The largest fold changes were reported for B-cell activating factor (BAFF), Cripto-1, sex-hormone-binding globulin and angiotensinogen. The urinary levels of complement components C5/C5a and factor D were also significantly elevated in patients with IgAVN. A total of 69 urinary proteins significantly raised levels in comparisons made between IgAVN vs. HCs and nine proteins in IgAVwoN vs. HCs, respectively. This study identified key urinary proteins potentially involved in IgAVN providing new insight into the pathophysiology. Further longitudinal studies with larger cohorts are needed to quantitatively analyse these biomarkers.