This study reports the protective role of the aqueous extract of Syzygium aromaticum (ESA) against lead (Pb)-induced neurotoxicity in mice. Thirty male mice weighing between 18 g and 25 g were randomly divided into five groups. (1) Group 1 (control group), (2) group 2 (Pb-test group): was administered with a solution containing 0.1% (w/v) of lead acetate (PbAc), (3) group 3 (ESA + Pb100 group): was administered with 0.1% (w/v) of PbAc followed by 100 mg/kg of S. aromaticum extract by gavage, (4) group 4 (ESA + Pb200): was administered with 0.1% (w/v) of PbAc followed by 200 mg/kg of S. aromaticum extract, and (5) group 5 (ESA-group): was administered with 100 mg/kg of S. aromaticum. Level of lead was determined by atomic absorption spectroscopy. Cerebral cortex synaptosomes prepared from mice administered orally with lead-acetate shown a significantly increased (p < .05) in tyrosine hydroxylase and protein carbonyl level and significantly decreased (p < .05) superoxide dismutase, glutathione reductase, and glutathione transferase activities. Also, there was a significant increase in brain lead concentration level, however, it was observed that S. aromaticum significantly reduced (p < .05) the level of lead at all tested doses. S. aromaticum rescued cerebral cortex synaptosomes from lead-induced neurotoxicity by relieving oxidative stress and abating elevated tyrosine hydroxylase activity. Moreover, S. aromaticum at the different dose grade (100 mg and 200 mg) abrogated the loss of motor performance in mice groups induced with lead. Altogether, our findings showed that S. aromaticum possesses antioxidant and neuro-modulatory potential against lead-induced neuronal damage. Practical applicationsEnvironmental pollution with heavy metals is a known public health concern and their incremental concentrations in soil and water have risen to an unprecedented degree.Lead is one of the top 10 contaminants on the WHO's list of substances of greatest public health concern that impact the brain. However, exogenous natural bioactive supplements molecules could be one of the remedies to reduce Pb-induced toxicity.Our findings indicate therefore that, S. aromaticum could be a good fit for lowering Pb How to cite this article:

Staphylococcus aureus is a leading cause of about 80% of infections in humans and up to 60–70% of hospital-acquired infections. Pneumonia is the broad term for a range of disorders that result in infection of the lung parenchyma and are caused by a number of organisms. It is a common disease that affects people from all walks of life. Identification of an etiologic agent for pneumonia is critical in order to provide appropriate therapy and maintain epidemiological records. Study on the transcriptional profiling of patients infected with S. aureus is a pivot to the analysis of differentially expressed gene in the blood of patients infected with S. aureus. This study performed the analysis of gene expression dataset GSE30119 available on the Gene expression Omnibus (GEO) which is based on the hypothesis tested that patient clinical heterogeneity will be reflected in transcriptional profile heterogeneity. The study comprised 143 pediatric patients, with 44 healthy individuals, 81 pneumonia-free, and 18 pneumonia infection patients. We discovered a total of 54 genes related to S. aureus infection and 612 genes associated with Pneumonia. According to Gene Ontology (GO) functional and pathway enrichment studies, the S. aureus infection associated genes are predominantly engaged in the innate immune response, calcium-mediated signaling, Neutrophil extracellular trap formation, Formation of Fibrin Clot (Clotting Cascade). Whereas the genes associated with Pneumonia are enriched in adaptive immune response, inflammatory, Interferon alpha/beta signaling, TCR signaling, Gα(i) signalling events. This study shows differentially expressed genes and their biological activities in relation to S. aureus infection and Pneumonia, and it may provide more light on the underlying molecular mechanisms and possibly important gene signatures in Pneumonia development.