Full-term placenta, smokers and non-smokers
Ontology highlight
ABSTRACT:
ORGANISM(S): Homo sapiens
PROVIDER: GSE7434 | GEO | 2007/10/01
SECONDARY ACCESSION(S): PRJNA97959
REPOSITORIES: GEO
Similar Datasets
Project description:Gene expression in placenta from 5 smoking and 5 non-smoking mothers analyzed by Affymetrix Hg133_plus2 microarrays. Experiment Overall Design: Gene expression in placenta from 5 smoking and 5 non-smoking mothers analyzed by Affymetrix Hg133_plus2 microarrays.
2008-06-15 | E-GEOD-7434 | biostudies-arrayexpress
Project description:We used microarrays to determine the transcriptional profiles of placental tissue obtained from women who smoked during pregnancy and from women who did not smoke during pregnancy. Fetal growth restriction is a frequent complication in mothers who smoke cigarettes during pregnancy. To evaluate novel pathways that regulate fetal growth affected by mothers who smoke, we isolated placental mRNA from smoking mothers with severe fetal growth restriction and compared them by microarray analysis to non-smoking mothers with appropriately grown fetuses. Bioinformatics analysis revealed distinct transcriptional patterns in the placentas of smoking mothers when compared to placentas from control non-smoking women. Analyses of the top upregulated and downregulated genes revealed several gene products such as secreted frizzled related protein 1 that was markedly upregulated in the placentas from women who smoked cigarettes during pregnancy.
2016-08-08 | GSE71931 | GEO
Project description:We used microarrays to determine the transcriptional profiles of placental tissue obtained from women who smoked during pregnancy and from women who did not smoke during pregnancy. Fetal growth restriction is a frequent complication in mothers who smoke cigarettes during pregnancy. To evaluate novel pathways that regulate fetal growth affected by mothers who smoke, we isolated placental mRNA from smoking mothers with severe fetal growth restriction and compared them by microarray analysis to non-smoking mothers with appropriately grown fetuses. Bioinformatics analysis revealed distinct transcriptional patterns in the placentas of smoking mothers when compared to placentas from control non-smoking women. Analyses of the top upregulated and downregulated genes revealed several gene products such as secreted frizzled related protein 1 that was markedly upregulated in the placentas from women who smoked cigarettes during pregnancy. Total RNA was isolated from placental specimens obtained at time of delivery. RNA was hybridized to Affymetrix arrays, and analyzed.
2016-08-08 | E-GEOD-71931 | biostudies-arrayexpress
Project description:Cigarette smoking is the leading cause of the respiratory diseases collectively known as chronic obstructive pulmonary disease (COPD). While the pathogenesis of COPD is complex, there is abundant evidence that alveolar macrophages (AM) play an important role. Based on the concept that COPD is a slow-progressing disorder likely involving multiple mediators released by AM activated by cigarette smoke, the present study focuses on the identification of previously unrecognized genes that may be linked to early events in the molecular pathogenesis of COPD, as opposed to factors associated with the presence of disease. To accomplish this, microarray analysis using Affymetrix microarrays was used to carry out an unbiased survey of the differences in gene expression profiles in the AM of phenotypically normal, ~20 pack-yr smokers compared to healthy non-smokers. Although smoking did not alter the global gene expression pattern of AM, 75 genes were modulated by smoking, with 40 genes up-regulated and 35 down-regulated in the AM of smokers compared to non-smokers. Most of these genes belong to the functional categories of immune/inflammatory response, cell adhesion and extracellular matrix, proteolysis and antiproteolysis, lysosomal function, antioxidant-related, signal transduction and regulation of transcription. Of these 75 genes, 69 have not been previously recognized to be up- or down-regulated in alveolar macrophages in association with smoking or COPD, including genes coding for proteins belonging to all of the above categories, and others belonging to various functional categories or of unknown function. These observations suggest that gene expression responses of alveolar macrophages associated with the stress of cigarette smoking are more complex than previously thought, and offer a variety of new insights into the complex pathogenesis of smoking-induced lung diseases. Keywords: Comparison of gene expression profile in smokers vs non-smokers
2005-09-26 | GSE3212 | GEO
Project description:The initial site of smoking-induced lung disease is the small airway epithelium, which is difficult and time consuming to sample by fiberoptic bronchoscopy. We developed a rapid, office-based procedure to obtain trachea epithelium without conscious sedation from healthy nonsmokers (n=26) and healthy smokers (n=19, 27 ± 15 pack-yr). Gene expression differences [fold-change >1.5, p< 0.01, Benjamini-Hochberg correction] were assessed with Affymetrix microarrays. 1,057 probe sets were differentially expressed in healthy smokers vs nonsmokers, representing >500 genes. Trachea gene expression was compared to an independent group of small airway epithelial samples (n=23 healthy nonsmokers, n=19 healthy smokers, 25 ± 12 pack-yr). The trachea epithelium is more sensitive to smoking, responding with 3-fold more differentially-expressed genes than small airway epithelium. The trachea transcriptome paralleled the small airway epithelium, with 156 of 167 (93%) genes that are significantly up- and down-regulated by smoking in the small airway epithelium showing similar direction and magnitude of response to smoking in the trachea. Trachea epithelium can be obtained without conscious sedation, representing a less invasive surrogate “canary” for smoking-induced changes in the small airway epithelium. This should prove useful in epidemiologic studies correlating gene expression with clinical outcome in assessing smoking-induced lung disease. Experiment Overall Design: Tracheal gene expression: matched group of small airway epithelial samples (n=23 healthy non-smokers, n= 19 healthy smokers)
2009-09-04 | E-GEOD-13933 | biostudies-arrayexpress
Project description:The earliest morphologic evidence of changes in the airways associated with chronic cigarette smoking is in the small airways. To help understand how smoking modifies small airway structure and function, we developed a strategy using fiberoptic bronchoscopy and brushing to sample the human small airway (10th-12th order) bronchial epithelium to assess gene expression (Affymetrix HG-U133A array) in phenotypically normal smokers (n=6, 24 ± 4 pack-yr) compared to matched non-smokers (n=5). Compared to samples from the large (2nd to 3rd order) bronchi, the small airway samples had a higher proportion of ciliated cells, but less basal, undifferentiated, and secretory cells. The small, but not large, airway samples included Clara cells, a cell found only in the small airway epithelium, and the small, but not the large, airway epithelium expressed genes for the surfactant apoproteins. Despite the fact that the smokers were phenotypically normal, analysis of the small airway epithelium of the smokers compared to the non-smokers demonstrated up- and -down-regulation of genes in multiple categories relevant to the pathogenesis of chronic obstructive lung disease (COPD), including genes coding for cytokines/innate immunity, apoptosis, pro-fibrosis, mucin, responses to oxidants and xenobiotics, antiproteases and general cellular processes. In the context that COPD starts in the small airways, these changes in gene expression in the small airway epithelium in phenotypically normal smokers are candidates for the development of therapeutic strategies to prevent the onset of COPD. Keywords: response to cigarette smoking
2005-10-30 | GSE3320 | GEO
Project description:Arginase was purified about 1800-fold from extracts of human full-term placenta; the enzyme appeared to be homogenous by disc electrophoresis and molecular-sieve chromatography. The mol. wt. determination by gel filtration and sodium dodecyl sulphate/polyacrylamide-gel electrophoresis yielded a value of 70000 for the most pure and the partially purified enzyme. The human placenta arginase is a metalloenzyme with an optimum pH of 9.1. The Km for L-arginine is 27 mM. L-Ornithine and L-lysine show competitive inhibition with Ki values of 6.3 and 14 mM respectively.
| S-EPMC1164156 | biostudies-other
Project description:Placenta is an epitome of cell signalling, including the signalling between two semi-allogenic individuals, mother and fetus. We have studied the putative crosstalk by analyzing the expression of corresponding ligands and receptors on maternal fetal interface. This transcriptome represents one of the important cellular sources, namely the multinucleated fetal layer that is directly bathed in the maternal blood. It was collected by microdissection, as it is too large to be included in the single cell preparation. In combination with other compartments, whose transcriptomes are provided along with this one, we think this study provides a rich resource of gene expression profiles of term placenta.
2017-01-31 | GSE87725 | GEO
Project description:Objective: to Identify the effect of surface texture on the modulation of gene transcription of implant adherent cells as influenced by the smoking habits of the subjects.
2015-11-14 | GSE42288 | GEO