Project description:To investigate the candidate molecular mechanisms underlies methamphetamine-associated CPP memory retrieval and reconsolidation, we compared the transcriptional profling changes in the mPFC between mice that underwent retrieval and non-retrieval after methamphetamine-paired CPP training.
Project description:Hypothalamic hamartomas (HHs) are congenital lesions of the neuroendocrine brain composed of neurons and astroglia. Frequently, HHs are associated with central precocious puberty (CPP) and/or gelastic seizures. Because HHs might express genes similar to those required for the initiation of normal puberty we used cDNA arrays to compare the gene expression profile of a HH associated with CPP with three HHs not accompanied by sexual precocity. Our aim was to identify genes whose expression may be selectively altered in the HH with CPP and hence, involved in the onset of puberty. Keywords: comparison between HH with and without CPP
Project description:Hypothalamic hamartomas (HHs) are congenital lesions of the neuroendocrine brain composed of neurons and astroglia. Frequently, HHs are associated with central precocious puberty (CPP) and/or gelastic seizures. Because HHs might express genes similar to those required for the initiation of normal puberty we used cDNA arrays to compare the gene expression profile of a HH associated with CPP with three HHs not accompanied by sexual precocity. Our aim was to identify genes whose expression may be selectively altered in the HH with CPP and hence, involved in the onset of puberty. Experiment Overall Design: Affymetrix arrays were used to detect global changes in gene expression. The results of this analysis were confirmed by semi-quantitative PCR.
Project description:Chemical Denaturation and Protein Precipitation (CPP) was performed on an E. coli lysate in order to determine the precipitaiton midpoint for the proteome
Project description:In order to screen for molecules contributing to the effects of FGF1/CPP-C on radiation-induced intestinal damage, the total RNA expression profile of the irradiated jejunum was obtained using a DNA microarray analysis after Carbon-ion irradiation with the FGF1/CPP-C pretreatment.
Project description:This study demonstrates that siRNA off-targets (e.g. 3'UTR off-targets), can be significantly reduced when cells are treated with a relatively low dose of siRNA (e.g. 1nM) that is sufficient to effectively silence the intended target. Cells were treated with different concentrations of either unmodified siRNA or modified siRNA that targeted either hexokinase2 or STAT3 (HK2-3581, HK2-4031, HK2-3581M, STAT3-1676, STAT3-1676M). As transfection efficiencies can vary according to the ratio of nucleotide to transfection reagent, each dose was supplemented with non-targeting/negative control siRNA (siGenome2 or Allstars negative control), such that the total RNA concentration was equal across experiments. RNA was purified 48 hours post-transfection using the RNeasy mini kit from Qiagen. Biological replicates were normalized using the RMA method and analyzed using various Bioconductor tools.
Project description:The Aryl Hydrocarbon Receptor (AHR) regulates the expression of numerous genes in response to activation by agonists including xenobiotics. Although it is well appreciated that environmental signals and cell intrinsic features may modulate this transcriptional response, how it is mechanistically achieved remains poorly understood. We show that Hexokinase 2 (HK2) a metabolic enzyme fuelling cancer cell growth, is a transcriptional target of AHR as well as a modulator of its activity. Expression of HK2 is positively regulated by AHR upon exposure to agonists both in human cells and in mice lung tissues. Conversely, over-expression of HK2 regulates the abundance of many proteins involved in the regulation of AHR signalling and these changes are linked with altered AHR expression levels and transcriptional activity. HK2 expression also shows a negative correlation with AHR promoter methylation in tumours, and these tumours with high HK2 expression and low AHR methylation are associated with a worse overall survival in patients. In sum, our study provides novel insights into how AHR signalling is regulated which may help our understanding of the context-specific effects of this pathway and may have implications in cancer.
