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An Immune and Inflammation Signature in Prostate Tumors of Smokers (part 3)

ABSTRACT: Current smokers develop metastatic prostate cancer more frequently than nonsmokers, suggesting that a tobacco-derived factor induces metastasis. To identify smoking-induced alterations in human prostate tumors, we analyzed gene and protein expression of tumors from current, past, and never smokers and observed distinct molecular alterations in current smokers. Specifically, an immune and inflammation signature was identified in prostate tumors of current smokers that was either attenuated or absent in past and never smokers. Key characteristics of this signature included augmented immunoglobulin expression by tumor-infiltrating B cells, NF-kB activation, and increased interleukin-8 in tumor and blood. In an alternate approach to characterize smoking-induced oncogenic alterations, we explored the effects of nicotine in prostate cancer cells and prostate cancer-prone TRAMP mice. These experiments showed that nicotine increases both invasiveness of human prostate cancer cells and metastasis in tumor-bearing TRAMP mice, indicating that nicotine can induce a phenotype that resembles the epidemiology of smoking-associated prostate cancer progression. In summary, we describe distinct oncogenic alterations in prostate tumors from current smokers and show that nicotine can enhance prostate cancer metastasis. TRAMP mice in five replicates received either tap water or a solution of 250 µg/ml of nicotine [nicotine tartrate salt (Sigma-Aldrich, St. Louis, MO)] in tap water

ORGANISM(S): Mus musculus

SUBMITTER: Stefan Ambs

PROVIDER: E-GEOD-68137 | biostudies-arrayexpress |

REPOSITORIES: biostudies-arrayexpress

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An Immune and Inflammation Signature in Prostate Tumors of Smokers (part 2)

Project description:Current smokers develop metastatic prostate cancer more frequently than nonsmokers, suggesting that a tobacco-derived factor induces metastasis. To identify smoking-induced alterations in human prostate tumors, we analyzed gene and protein expression of tumors from current, past, and never smokers and observed distinct molecular alterations in current smokers. Specifically, an immune and inflammation signature was identified in prostate tumors of current smokers that was either attenuated or absent in past and never smokers. Key characteristics of this signature included augmented immunoglobulin expression by tumor-infiltrating B cells, NF-kB activation, and increased interleukin-8 in tumor and blood. In an alternate approach to characterize smoking-induced oncogenic alterations, we explored the effects of nicotine in prostate cancer cells and prostate cancer-prone TRAMP mice. These experiments showed that nicotine increases both invasiveness of human prostate cancer cells and metastasis in tumor-bearing TRAMP mice, indicating that nicotine can induce a phenotype that resembles the epidemiology of smoking-associated prostate cancer progression. In summary, we describe distinct oncogenic alterations in prostate tumors from current smokers and show that nicotine can enhance prostate cancer metastasis. 22RV1 and LnCap in three replicates were treated with 100uM nocotine for 24 hours and then compared the global gene expression profiles.

2015-04-22 | E-GEOD-68136 | biostudies-arrayexpress

An Immune and Inflammation Signature in Prostate Tumors of Smokers (part 1)

Project description:Current smokers develop metastatic prostate cancer more frequently than nonsmokers, suggesting that a tobacco-derived factor induces metastasis. To identify smoking-induced alterations in human prostate tumors, we analyzed gene and protein expression of tumors from current, past, and never smokers and observed distinct molecular alterations in current smokers. Specifically, an immune and inflammation signature was identified in prostate tumors of current smokers that was either attenuated or absent in past and never smokers. Key characteristics of this signature included augmented immunoglobulin expression by tumor-infiltrating B cells, NF-kB activation, and increased interleukin-8 in tumor and blood. In an alternate approach to characterize smoking-induced oncogenic alterations, we explored the effects of nicotine in prostate cancer cells and prostate cancer-prone TRAMP mice. These experiments showed that nicotine increases both invasiveness of human prostate cancer cells and metastasis in tumor-bearing TRAMP mice, indicating that nicotine can induce a phenotype that resembles the epidemiology of smoking-associated prostate cancer progression. In summary, we describe distinct oncogenic alterations in prostate tumors from current smokers and show that nicotine can enhance prostate cancer metastasis. Prostate tissues of cancer patients were selected for RNA extraction and hybridization on Affymetrix microarrays. Gene expression profiles of current, past and never smokers were compared.

2015-04-22 | E-GEOD-68135 | biostudies-arrayexpress

An Immune and Inflammation Signature in Prostate Tumors of Smokers (part 3)

2015-04-22 | GSE68137 | GEO

An Immune and Inflammation Signature in Prostate Tumors of Smokers (part 2)

2015-04-22 | GSE68136 | GEO

An Immune and Inflammation Signature in Prostate Tumors of Smokers (part 1)

2015-04-22 | GSE68135 | GEO

Effect of paraquat and nicotine on gene expression in a Drosophila melanogaster Parkinson's disease model

Project description:Cigarette smoking is associated with reduced risk of developing Parkinson’s disease (PD). To identify genes that interact with nicotine/smoking, we performed hypothesis-free genome-wide experiments in a paraquat-induced Drosophila model and in a case-control study of PD. We demonstrated that nicotine extends life-span in paraquat-treated Drosophila (P=4E-30). Brain tissue from flies treated with combinations of paraquat and nicotine revealed elevated expression of CG14691 with paraquat which was restored with nicotine co-treatment (P(interaction)=2E-11, P(FDR-adjusted)=4E-7). Independently, variants in the 5’ region of SV2C, a human ortholog of CG14691, gave the strongest signal for interaction with smoking (P(interaction)=9E-8). The effect of smoking on PD risk varied six-fold by SV2C genotype (P(heterogeneity)=4E-10). Moreover, SV2C variants identified here were associated with SVC2 gene-expression in the HapMap data. Present results suggest synaptic vesicle protein SV2C plays a role in PD pathogenesis, and that the SV2C genotype may be useful for clinical trials of nicotine for treating PD. Drosophila female heads were dissected after exposure to plain food, food with paraquat, food with nicotine, or food with both paraquat and nicotine, and genome-wide expression was quantified using Affymetrix microarrays. 20 heads were pooled per replicate, with each treatment in triplicate, and all flies were dissected at the same timepoint, after 10 days of pretreatment (with 0.1 mg/ml nicotine or no nicotine, depending on treatment group), and then a further 6 days of treatment with either 5 mM paraquat or no paraquat, continuing on the pretreatment dose of nicotine. One biological replicate in the paraquat-only group showed RNA degradation and was not included in the normalization or subsequent analyses.

2012-09-05 | E-GEOD-35930 | biostudies-arrayexpress

microRNA expression of human periodontal ligament derived stem cell line exposed to 1 microMolar (uM) (-)-nicotine liquid or 1 uM nicotine electronic cigarette vapor extract against untreated control

Project description:Nicotine and cigarette smoking have been previously shown to inhibit the differentiation potential and miRNA expression of human periodontal ligament derived stem cells (PDLSCs). Electronic cigarette (EC) vapor also contains nicotine, as well as other non-nicotine compounds, and, like cigarette smoking, EC vaping results in similar routes of toxic exposure for PDLSCs. The effect of exposure on PDLSC miRNA expression is unknown. To determine these effects, cultured PDLSCs were exposed to media supplemented with 1 uM nicotine EC vapor extract for 72h, during which media was changed every 24h. To produce vapor extract, an EC filled with 36 mg/ml nicotine, 50%/50% (w/v) PG/VG, non-flavored e-liquid (American E-liquid) was vaped using an automated vaping robot programmed with experienced e-cigarette user patterns (i.e. puff volume: 70 ml, duration: 3s, frequency: 20s) and resulting vapor was extracted via a liquid impinger. 1 uM of pure (-)-nicotine liquid (Sigma Aldrich) was used as a positive control. Total miRNA was collected with the mirVana miRNA isolation kit. miRNA concentration and quality was measured by spectrophotometry and expression was analyzed with Affymetrix GeneChip miRNA 4.0 Arrays. Results were normalized against human-positive and negative chip controls using Robust Multi-Array Average Normalization.

2019-09-30 | E-MTAB-7893 | biostudies-arrayexpress

Genome-wide RNA-sequencing differences in nucleus accumbens of smokers vs. nonsmokers

Project description:Cigarette smoking remains the leading cause of preventable death worldwide. Cigarette smoking behaviors (e.g., initiation, nicotine dependence, cessation) are heritable, and many genetic risk loci have been identified. However, the neurobiological mechanisms underlying the genetic risk loci along the trajectory of smoking are largely unknown. RNA-sequencing (RNA-seq) differences between smokers and nonsmokers can provide insight into mechanisms that predispose to smoking behaviors and consequences of the smoking exposure itself. Here, we provide RNA-seq data generated in nucleus accumbens, an addiction-relevant brain tissue, from 223 deceased individuals: 50 current cigarette smokers, 171 nonsmokers, and 2 individuals with undetermined smoking status. DNA methylation data on the Illumina HumanMethylationEPIC array are also available on most of these individuals and made available (GEO accession number GSE147040).

2021-04-14 | GSE171936 | GEO

Nicotinic acetylcholine receptors and EGF induce c-Kit ligand/Stem Cell Factor (SCF) in a M-NM-2-arrestin-1 and E2F1 dependent manner in NSCLC

Project description:Lung cancer remains the leading cause of cancer-related deaths worldwide. M-NM-2-arrestin-1 (ARRB1), a scaffolding protein involved in the termination or desensitization of signals arising from activated G-protein-coupled receptors (GPCRs) has been shown to play a role in invasion and proliferation of many cancers, including nicotine-induced proliferation of human nonM-bM-^@M-^Ssmall cell lung cancers (NSCLCs). In this study, we analyzed nicotine induced and M-NM-2-arrestin-1 dependent genes from the microarray data. Our analysis show that SCF (Stem cell factor) strongly differentiated smokers from non-smokers implying an important role of this gene in NSCLCs. SCF, a major cytokine is the ligand for the c-Kit proto-oncogene. Here we elucidate the molecular mechanisms by which nicotine as well as EGF induces the expression of SCF in lung adenocarcinoma cell lines A549 and H1650. ChIP assays and transient transfection experiments showed that transcription factor E2F1 can positively regulate SCF expression at the transcriptional level; depletion of E2F1 or M-NM-2-arrestin-1 prevented the nicotine-mediated induction of SCF. Given that the binding of SCF to c-Kit leads to activation of multiple downstream signaling pathways including Src, PI3K, MEK and EGFR pathways, our data suggest that the SCF plays a central role in lung carcinogenesis, and may be a potential therapeutic target for combating NSCLC. Studies presented here also provide evidence that SCF along with nicotine promotes self-renewal and proliferation of lung cancer stem cells (CSCs). Our findings reveal an important role and prognostic significance of SCF that can serve as a novel prognostic and predictive biomarker for NSCLC. Transfection of A549 cell line with control siRNA, Beta arrestin siRNA and then stimulation of nicotine

2013-11-10 | E-GEOD-44617 | biostudies-arrayexpress

Smoking Status Impacts microRNA Mediated Prognosis and Lung Adenocarcinoma Biology

Project description:Cigarette smoke is associated with the majority of lung cancers: however, 25% of lung cancer patients are non-smokers, and half of all newly diagnosed lung cancer patients are former smokers. Lung tumors exhibit distinct epidemiological, clinical, pathological, and molecular features depending on smoking status, suggesting divergent mechanisms underlie tumorigenesis in smokers and non-smokers. MicroRNAs (miRNAs) are integral contributors to tumorigenesis and mediate biological responses to smoking. Based on the hypothesis that smoking-specific miRNA differences in lung adenocarcinomas reflect distinct tumorigenic processes selected by different smoking and non-smoking environments, we investigated the contribution of miRNA disruption to lung tumor biology and patient outcome in the context of smoking status. Results: We discovered novel and distinct smoking-status-specific patterns of miRNA and miRNA-mediated gene networks, and identified miRNAs that were prognostically significant in a smoking-dependent manner. Conclusions: We conclude that miRNAs disrupted in a smoking-status-dependent manner affect distinct cellular pathways and differentially influence lung cancer patient prognosis in current, former and never smokers. Our findings may represent promising biologically relevant markers for lung cancer prognosis or therapeutic intervention. We applied a whole transcriptome sequencing based approach to interrogate miRNA levels in 94 patient-matched lung adenocarcinoma and non-malignant lung parenchymal tissue pairs from current [CS], former [FS] and never smokers [NS].

2014-10-30 | E-GEOD-62182 | biostudies-arrayexpress

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