Alzheimer Disease ; etiology ; Brain Ischemia ; etiology ; Epilepsy ; etiology ; Histamine ; physiology ; Humans ; Parkinson Disease ; etiology

Brain Ischemia ; Cerebral Infarction ; Humans ; Subarachnoid Hemorrhage ; Vasospasm, Intracranial/etiology*

OBJECTIVETo study the clinical characteristics of Mycoplasma pneumoniae (MP)-associated ischemic stroke in children.

METHODSThe case of a girl with MP-associated ischemic stroke was reported, including clinical manifestations and laboratory and imaging examinations, and related literature was reviewed.

RESULTSThe girl, who was suffering from a respiratory tract infection was found to have hemiplegia and aphasia which were expressed in ischemic stroke. IgM antibody to MP in serum (1∶320) and lavage fluid was positive. Pulmonary imaging showed unilateral consolidation and pleural exudate. Cerebral neuroimaging examination showed occlusion of the bilateral middle cerebral artery, mainly on the left side. The neurological symptoms and signs were recovered after comprehensive therapy with medication (azithromycin, hormone and heparin) and rehabilitation training.

CONCLUSIONSIschemic stroke is rare but severe manifestation of central nervous system damage in children suffering from MP infection. Cerebral imaging and etiological examinations contribute to the diagnosis. Early use of macrolide antibiotics, anticoagulant and hormone may improve the prognosis.

Brain Ischemia ; etiology ; Child ; Female ; Humans ; Pneumonia, Mycoplasma ; complications ; drug therapy ; Stroke ; etiology

Brain Ischemia ; etiology ; Child ; Humans ; Male ; Metabolic Syndrome ; complications ; Stroke ; etiology

Brain Ischemia ; etiology ; Humans ; Infant ; Male ; Mucocutaneous Lymph Node Syndrome ; complications ; Stroke ; etiology

OBJECTIVETo investigate the role of miRNA-210 in hypoxic-ischemic brain edema in neonatal rats.

METHODSA total of 80 neonatal rats were randomly divided into control group, normal saline group, miRNA-210 expression inhibition group, and miRNA-210 overexpression group, with 20 rats in each group. Each group was randomly divided into sham-operation group and hypoxia-ischemia (HI) group, with 10 rats in each group. The neonatal rats in the HI group were treated with ligation of the left common carotid artery and then put in a hypoxia cabin with mixed gas of 8% O2 and 92% N2 for 2 hours; those in the sham-operation group were treated with isolation of the left common carotid artery only, without ligation or hypoxia treatment. After HI or sham-operation, the rats in the normal saline group, miRNA-210 expression inhibition group, and miRNA-210 overexpression group were intracranially injected with normal saline (2.5 mg/kg), miRNA-210 inhibitor (2.5 mg/kg), and miRNA-210 mimic (2.5 mg/kg) respectively. No treatment was given to the rats in the control group. The rats were sacrificed three days later, and the left brain tissue was harvested. Fluorescent quantitative PCR was used to measure the expression of miRNA-210; the dry-wet weight method was used to measure the water content of brain tissue; hematoxylin and eosin staining was used to observe the histomorphological changes in the brain.

RESULTSThe HI groups showed significant reductions in the expression of miRNA-210 and significant increases in the water content of brain tissue compared with the corresponding sham-operation groups (P<0.05). Compared with the normal saline HI group, the miRNA-210 expression inhibition HI group showed a significant reduction in the expression of miRNA-210 and a significant increase in the water content of brain tissue (P<0.05), and the miRNA-210 overexpression HI group showed a significant increase in the expression of miRNA-210 and a significant reduction in the water content of brain tissue (P<0.05). The results of hematoxylin and eosin staining suggested that the miRNA-210 expression inhibition HI group showed marked edema, and the miRNA-210 overexpression HI group showed a significant improvement in edema.

CONCLUSIONSNeonatal rats show down-regulated expression of miRNA-210 after HI, suggesting that miRNA-210 may be involved in the development and progression of hypoxic-ischemic brain edema in neonatal rats.

Animals ; Animals, Newborn ; Brain Edema ; etiology ; Female ; Hypoxia-Ischemia, Brain ; etiology ; Male ; MicroRNAs ; analysis ; physiology ; Rats ; Rats, Sprague-Dawley

As a kind of mitochondrial membrane protein with protein kinase activity, phosphatase and tensin homolog deleted on chromosome ten induced kinase 1 (PINK1) is involved in many biological metabolic processes. Since PINK1 had been found to be associated with Parkinson's disease, researchers have been exploring its biological function. PINK1 localizes in the outer mitochondrial membrane and regulates cell function through phosphorylating proteins. PINK1 is involved in mitochondrial function, mitochondrial morphology and mitochondrial autophagy, but the regulatory pathway is not yet clear. PINK1 is expressed widely in many tissues with a variety of biological activity, especially in tissues with high energy consumption. It may therefore be involved in the development and regulation of many diseases. Mutations in PINK1 were originally discovered to cause autosomal recessive Parkinson's disease. Recently some research has revealed that PINK1 is related to the development of neonatal hypoxic-ischemic encephalopathy, cancer, diabetes and other diseases. Studying and exploring the biological functions of PINK1 will facilitate the identification of the targets for therapeutic intervention for its related diseases. This review article mainly focuses on recent studies about the biological function and related diseases of PINK1.
Autophagy ; Diabetes Mellitus, Type 2 ; etiology ; Humans ; Hypoxia-Ischemia, Brain ; etiology ; Mitochondria ; physiology ; Neoplasms ; etiology ; Protein Kinases ; chemistry ; physiology

Animals ; Humans ; Hypothermia, Induced ; Hypoxia-Ischemia, Brain ; etiology ; therapy ; Infant, Newborn ; Randomized Controlled Trials as Topic

Long non-coding RNAs (lncRNAs) are transcripts with a complex structure and a length of >200 nt which are unable to encode proteins. The lncRNAs interact with DNA, mRNA, and proteins and regulate gene expression through various mechanisms, thus participating in the regulation of various biological processes. Studies have shown that lncRNAs play important roles in neural development and the pathogenesis of diseases. This article reviews the roles of lncRNAs in hypoxic-ischemic brain damage.
Apoptosis ; Autophagy ; Humans ; Hypoxia-Ischemia, Brain ; etiology ; Neovascularization, Physiologic ; Nerve Regeneration ; RNA, Long Noncoding ; physiology

OBJECTIVE: To investigate the differential expression of miR-30a-5p in patients with poststroke depression and explore the possible mechanism. METHODS: We obtained the target microRNAs through searching PubMed using the online software VENNY2.1. We collected the baseline demographic, clinical and radiographic data from consecutive patients with first-ever acute ischemic stroke on admission in our department from October, 2018 to March, 2019. From each patient, 5 mL peripheral venous blood was collected upon admission. Hamilton Depression Scale (HAMD-17) was used to evaluate the degree of depression at the end of the 3-month follow-up. The patients with a HAMD-17 score≥7 were diagnosed to have depression according to the diagnostic criteria of the Fourth Edition of the Diagnostic and Statistical Manual of Mental Disorders of the American Psychiatric Association (DSM-IV). The patients were divided into post-stroke depression group (PSD group, =11) and non-post-stroke depression group (non-PSD group, =25), and their plasma levels of miR-30a-5p were detected using qPCR. The STARBASE Database ENCORI miRNA-mRNA module and Comparative Toxicogenomics Database were used to predict and screen the possible target genes related to miR-30a-5p, and the possible mechanism of the target genes was further analyzed through bioinformatics. RESULTS: miR-30a-5p was identified by cross-screening as the target miRNA associated with stroke and depression and showed obvious differential expression between PSD and non-PSD patients (2.462±0.326 1±0.126, < 0.0001). ROC curve analysis showed that the AUC of miR-30a-5p for predicting PSD was 0.869 (95%: 0.745-0.993, =0.0005) at the cutoff value of 1.597, with a sensitivity and specificity of 0.727 and 0.840, respectively. The target proteins of miR-30a-5p involved a wide range of biological processes, including signal transduction, intercellular communication, regulation of nucleobase, nucleoside, nucleotide and nucleic acid metabolism. KEGG pathway enrichment analysis showed that the target proteins affected mainly the neural nutrient signaling pathway, axon guidance signaling pathway and insulin signaling system. We also identified the top 20 HUB genes that might be associated with post-stroke depression. CONCLUSIONS Plasma miR-30a-5p is differentially expressed in PSD and can serve as a new blood marker for diagnosis and also a therapeutic target of PSD.
Brain Ischemia ; Computational Biology ; Depression ; etiology ; genetics ; Gene Expression Regulation, Neoplastic ; Humans ; MicroRNAs ; genetics ; Stroke ; complications