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Bronchial Asthma is outlined as a chronic irritation of the airways in children. Vitamin D is a real immune system regulator which has a potential part in allergy. Asymmetric Dimethyl Arginine (ADMA) is an endogenic Nitric Oxide Synthase (NOS) inhibitor. This study is to determine if there is a role of vitamin D deficiency, ADMA in the pathogenesis of asthma in children, And whether the decreased arginine bioavailability and NOS suppression by ADMA contribute to respiratory tract blockage or not. We measured serum vitamin D, ADMA, nitric oxide and plasma L-arginine in 30 asthmatic and 10 healthy children. Serum 25-hydroxy vitamin D, plasma L-Arginine and serum Nitric Oxide were decreased significantly in asthmatic patients compared to healthy children. On the other hand, ADMA serum levels were increased significantly in asthmatic patients. In asthmatic children, there were positive correlations between serum vitamin D concentration and forced expiratory volume in the first, second FEV1 (% predicted). Furthermore, there were negative correlations between serum ADMA concentration and FEV1 (%predicted). In conclusion, marked reduction of vitamin D and elevated ADMA serum levels in asthmatic children has contributed to NOS-related pathophysiology, therefore ADMA and vitamin D could be considered reliable in managing oxidative stress in asthma.

ObjectiveThe most prevalent brain‐specific microRNA, MicroRNA‐124, exhibits anti‐inflammatory properties. Luteolin nano‐formulation with Zn oxide in the form of L/ZnO NPs may boost anti‐diabetic properties; however, its beneficial effect on miRNAs is yet unknown in diabetes. The effectiveness of L/ZnONPs supplements in preventing diabetic neurodegeneration by modulating inflammatory responses in a diabetic model was investigated.MethodsA diabetic rat model was induced by a high‐fat diet and streptozotocin (30 mg/kg I.P.). Plasma glucose, insulin, and HOMR‐IR levels, as well as cytokines, lipid peroxidation, GSH/GSSG, and glucose transporter 1, were determined along with the tight junction proteins occludin (OCLN) and zona occludens 1 (ZO‐1). Moreover, the expressions of brain CCAAT/enhancer‐binding protein (C/EBPA mRNA), miR‐124, glial fibrillary acidic protein (GFAP), and NF‐kBp65 were measured alongside the histological investigation.ResultsThe results revealed that L/ZnO NPs were able to diminish lipid peroxidation, increase the activity of antioxidant enzymes, and reduce inflammation under oxidative stress. Consequently, it was able to reduce hyperglycemia, elevate insulin levels, and improve insulin resistance. Besides, L/ZnO NPs upregulate miR‐124, reduce C/EBPA mRNA, increase BCl‐2, and inhibit apoptosis. The results indicate that diabetes raises BBB permeability via tight junction protein decline, which is restored following L/ZnO NPs treatment. Luteolin/ZnO NPs regulate miR‐124 and microglia polarization by targeting C/EBPA and are expected to alleviate inflammatory injury via modulation of the redox‐sensitive signal transduction pathways. Luteolin/ZnO NPs have a novel target for the protection of the BBB and the prevention of neurological complications in diabetes.