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Liao Q.,Zhejiang University | Wang Y.,The 148 Central Hospital of PLA | Cheng J.,Ningbo Kangning Hospital | Dai D.,Zhejiang University | And 4 more authors.
European Journal of Medical Genetics | Year: 2015

Schizophrenia (SCZ) is a complex mental disorder contributed by both genetic and epigenetic factors. Long noncoding RNAs (lncRNAs) was recently found playing an important regulatory role in mental disorders. However, little was known about the DNA methylation of lncRNAs, although numerous SCZ studies have been performed on genetic polymorphisms or epigenetic marks in protein coding genes. We presented a comprehensive genome wide DNA methylation study of both protein coding genes and lncRNAs in female patients with paranoid and undifferentiated SCZ. Using the methyl-CpG binding domain (MBD) protein-enriched genome sequencing (MBD-seq), 8,163 and 764 peaks were identified in paranoid and undifferentiated SCZ, respectively (. p<1×10-5). Gene ontology analysis showed that the hypermethylated regions were enriched in the genes related to neuron system and brain for both paranoid and undifferentiated SCZ (. p<0.05). Among these peaks, 121 peaks were located in gene promoter regions that might affect gene expression and influence the SCZ related pathways. Interestingly, DNA methylation of 136 and 23 known lncRNAs in Refseq database were identified in paranoid and undifferentiated SCZ, respectively. In addition, ~20% of intergenic peaks annotated based on Refseq genes were overlapped with lncRNAs in UCSC and gencode databases. In order to show the results well for most biological researchers, we created an online database to display and visualize the information of DNA methyation peaks in both types of SCZ (. http://www.bioinfo.org/scz/scz.htm). Our results showed that the aberrant DNA methylation of lncRNAs might be another important epigenetic factor for SCZ. © 2014. Source

Ji H.,Zhejiang University | Dai D.,Zhejiang University | Wang Y.,The 148 Central Hospital of PLA | Jiang D.,Zhejiang University | And 11 more authors.
Experimental and Therapeutic Medicine | Year: 2015

Alzheimer's disease (AD) is a common neurodegenerative disorder that can destroy the memory of sufferers and lead to distress for the individual and society. Brain-derived neurotrophic factor (BDNF) and butyrylcholinesterase (BCHE) are two genes associated with β-amyloid plaques and neurofibrillary tangles that are two key factors in the pathophysiology of AD. The aim of the current meta-analysis was to evaluate the association between BDNF Val66Met (rs6265), BDNF C270T (rs2030324) and BCHE-K (rs1803274) polymorphisms and AD. A comprehensive meta-analysis was performed using the online database PubMed without a time limitation. A total of 56 articles evaluating 12,563 cases and 12,622 controls were selected for the current meta-analysis. The results showed a moderate association of the BDNF C270T polymorphism with the risk of AD in Asians under a dominant model (P=0.03; odds ratio, 1.88; 95% confidence interval, 1.08-3.27). No other significant association was found during the meta-analysis for the other two polymorphisms (P>0.05). The current meta-analysis suggests that BDNF C270T is a risk factor for AD in Asians. This meta-analysis has been, to the best of our knowledge, the most comprehensive meta-analysis of BDNF Val66Met, BDNF C270T and BCHE-K to date. © 2015 Spandidos Publications. All rights reserved. Source

Wang Y.,The 148 Central Hospital of PLA | Li J.,The 148 Central Hospital of PLA | Zhang Y.,The 148 Central Hospital of PLA | Yin H.,The 148 Central Hospital of PLA | Han B.,The 148 Central Hospital of PLA
Cancer Letters | Year: 2015

The transcripts of the gene Colorectal Neoplasia Differentially Expressed (CRNDE) are recognized as long-noncoding RNAs (lncRNAs), which are expressed in specific regions within the human brain, and are the most upregulated lncRNA in gliomas. However, the underlying regulation and function of CRNDE in gliomas are largely unknown. In this study, the upregulation of CRNDE was confirmed in both primary specimens from glioma patients and in vitro with cell lines. Overexpression of specific CRNDE transcript promotes cell growth and migration in vitro while knockdown of CRNDE expression manifests a repressive function during these cellular processes. The growth promoting effect of CRNDE was also demonstrated in a xenograft mouse model. Mechanistic studies further revealed that histone acetylation in the promoter region might account for the upregulation of CRNDE, and the level of CRNDE expression could be modulated by mammalian Target of Rapamycin (mTOR) signaling in glioma. Thus, our results shed a light on utilizing CRNDE as a potential novel therapeutic target for the treatment of glioma. © 2015. Source

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