Biochimica et Biophysica Acta (BBA) - Gene Structure and Expression最新文献

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Sphingosine kinase 1 expression is regulated by signaling through PI3K, AKT2, and mTOR in human coronary artery smooth muscle cells 人冠状动脉平滑肌细胞中鞘肽激酶1的表达受PI3K、AKT2和mTOR信号通路调控
Biochimica et Biophysica Acta (BBA) - Gene Structure and Expression Pub Date : 2007-04-01 DOI: 10.1016/j.bbaexp.2007.03.005
Jacquelyn M. Francy , Arpita Nag , Elizabeth J. Conroy, Jeremy A. Hengst, Jong K. Yun
{"title":"Sphingosine kinase 1 expression is regulated by signaling through PI3K, AKT2, and mTOR in human coronary artery smooth muscle cells","authors":"Jacquelyn M. Francy ,&nbsp;Arpita Nag ,&nbsp;Elizabeth J. Conroy,&nbsp;Jeremy A. Hengst,&nbsp;Jong K. Yun","doi":"10.1016/j.bbaexp.2007.03.005","DOIUrl":"10.1016/j.bbaexp.2007.03.005","url":null,"abstract":"<div><p>Sphingosine kinase 1 (SphK1) is a lipid kinase implicated in mitogenic signaling pathways in vascular smooth muscle cells. We demonstrate that human coronary artery smooth muscle (HCASM) cells require SphK1 for growth and that SphK1 mRNA and protein levels are elevated in PDGF stimulated HCASM cells. To determine the mechanism of PDGF-induced SphK1 expression, we used pharmacological inhibitors of the PI3K/AKT/mTOR signaling pathway. Wortmannin, SH-5, and rapamycin significantly blocked PDGF-stimulated induction of SphK1 mRNA and protein expression, indicating a regulatory role of the PI3K/AKT/mTOR pathway in SphK1 expression. To determine which isoform of AKT regulates SphK1 mRNA and protein levels, siRNAs specific for AKT1, AKT2, and AKT3 were used. We show that AKT2 siRNA significantly blocked PDGF-stimulated increases in SphK1 mRNA and protein expression levels as well as SphK1 enzymatic activity levels. In contrast, AKT1 or AKT3 siRNA did not have an effect. Together, these results demonstrate that the PI3K/AKT/mTOR signaling pathway is involved in regulation of SphK1, with AKT2 playing a key role in PDGF-induced SphK1 expression in HCASM cells.</p></div>","PeriodicalId":100161,"journal":{"name":"Biochimica et Biophysica Acta (BBA) - Gene Structure and Expression","volume":"1769 4","pages":"Pages 253-265"},"PeriodicalIF":0.0,"publicationDate":"2007-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.bbaexp.2007.03.005","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"26705796","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 27
Molecular cloning of two isoforms of Xenopus (Silurana) tropicalis estrogen receptor mRNA and their expression during development 热带非洲爪蟾雌激素受体两个亚型的克隆及其发育过程中的表达
Biochimica et Biophysica Acta (BBA) - Gene Structure and Expression Pub Date : 2007-03-01 DOI: 10.1016/j.bbaexp.2007.01.011
Minoru Takase , Taisen Iguchi
{"title":"Molecular cloning of two isoforms of Xenopus (Silurana) tropicalis estrogen receptor mRNA and their expression during development","authors":"Minoru Takase ,&nbsp;Taisen Iguchi","doi":"10.1016/j.bbaexp.2007.01.011","DOIUrl":"10.1016/j.bbaexp.2007.01.011","url":null,"abstract":"<div><p>Native estrogens and estrogenic chemicals exert their actions primarily through the nuclear estrogen receptors (ERs). The present study is directed towards providing a molecular basis for detection of estrogenic and antiestrogenic effects of compounds. In the present study, we isolated successfully two isoforms of a full-length <em>ER</em> mRNA from the liver of <em>Xenopus (Silurana) tropicalis</em>, and analyzed their expression in various tissues during the development by RT-PCR method. The isolated full-length <em>ER</em>α and <em>ER</em>β cDNAs contained a 1755-bp and a 1644-bp coding regions, respectively. The deduced amino acid sequence of <em>X. tropicalis</em> ERα was highly homologous to previously published <em>X. tropicalis</em> ERα, <em>Xenopus laevis</em> ERs (xer3, ERα1, and ERα2), and <em>X. laevis</em> ER-related proteins. The N-terminal region of the <em>X. tropicalis</em> ERα amino acid sequence cloned in the present study was more highly homologous to that of the xer3 amino acid sequence than the previously published <em>X. tropicalis</em> ERα sequence. Some amino acid residues in the D domain were absent in this sequence. In contrast, the deduced amino acid sequence of the C and E/F domains in <em>X. tropicalis</em> ERβ was highly homologous to those in teleosts, quail, and human ERβs. The RT-PCR analysis showed that expression of the two <em>ER</em> transcripts was relatively abundant in the brain, liver, and gonad/kidney complex of 2-month-old froglet, but weakly expressed in the heart, stomach, leg muscle, and back skin. Gonadal sex differentiation occurred histologically in the <em>X. tropicalis</em> tadpole between Nieuwkoop and Faber stages 54 and 59. The <em>ER</em>α transcripts in the brain, liver and gonad/kidney complex, and <em>ER</em>β in the brain were expressed at low levels in the tadpole at stage 51, but became extremely abundant in the tadpole at stage 60, and remained at relatively high levels in the froglet after metamorphosis. In contrast, <em>ER</em>β transcript was expressed abundantly in a consistent manner in the liver and gonad/kidney complex from stage 51 through metamorphosis. Expression of the two <em>ER</em> transcripts was recognized at almost the same levels in both sexes during the development, except for relatively lower expression of <em>ER</em>β in the female gonad after metamorphosis. These results taken together suggest that the brain, liver, and gonad/kidney complex of the <em>X. tropicalis</em> tadpole may be more susceptible to toxic influences by exogenous estrogenic substances after sex differentiation.</p></div>","PeriodicalId":100161,"journal":{"name":"Biochimica et Biophysica Acta (BBA) - Gene Structure and Expression","volume":"1769 3","pages":"Pages 172-181"},"PeriodicalIF":0.0,"publicationDate":"2007-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.bbaexp.2007.01.011","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"26593082","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 35
Promoter analysis of human CC chemokine CCL23 gene in U937 monocytoid cells 人CC趋化因子CCL23基因在U937单核细胞中的启动子分析
Biochimica et Biophysica Acta (BBA) - Gene Structure and Expression Pub Date : 2007-03-01 DOI: 10.1016/j.bbaexp.2007.01.012
Yong-Hyun Shin , Guy Wilhem Lee , Kyung-No Son , Sang Min Lee , Chang Joong Kang , Byoung S. Kwon , Jiyoung Kim
{"title":"Promoter analysis of human CC chemokine CCL23 gene in U937 monocytoid cells","authors":"Yong-Hyun Shin ,&nbsp;Guy Wilhem Lee ,&nbsp;Kyung-No Son ,&nbsp;Sang Min Lee ,&nbsp;Chang Joong Kang ,&nbsp;Byoung S. Kwon ,&nbsp;Jiyoung Kim","doi":"10.1016/j.bbaexp.2007.01.012","DOIUrl":"10.1016/j.bbaexp.2007.01.012","url":null,"abstract":"<div><p>Expression of CCL23 is induced by external stimuli including PMA in monocytes, but its transcriptional regulation has not been studied to date. Serial deletion analysis of its 5′ flanking region revealed that the region −<!--> <!-->293 to +<!--> <!-->31 was important for induction by PMA. <em>Cis</em>-acting elements at the −<!--> <!-->269/−<!--> <!-->264 (NFAT site), −<!--> <!-->167/−<!--> <!-->159 (NF-κB site), and −<!--> <!-->51/−<!--> <!-->43 (AP-1 site) positions were identified as the critical sites for the CCL23 expression in U937 cells. We demonstrated the binding of the transcription factors to the consensus sites. Specific inhibitors for signal pathways reduced PMA-induced expression of CCL23, confirming involvement of these transcription factors.</p></div>","PeriodicalId":100161,"journal":{"name":"Biochimica et Biophysica Acta (BBA) - Gene Structure and Expression","volume":"1769 3","pages":"Pages 204-208"},"PeriodicalIF":0.0,"publicationDate":"2007-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.bbaexp.2007.01.012","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"26211826","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 6
The ins and outs of ATP-dependent chromatin remodeling in budding yeast: Biophysical and proteomic perspectives 芽殖酵母中atp依赖性染色质重塑的来龙外脉:生物物理和蛋白质组学观点
Biochimica et Biophysica Acta (BBA) - Gene Structure and Expression Pub Date : 2007-03-01 DOI: 10.1016/j.bbaexp.2007.01.013
Joke J.F.A. van Vugt , Michael Ranes , Coen Campsteijn , Colin Logie
{"title":"The ins and outs of ATP-dependent chromatin remodeling in budding yeast: Biophysical and proteomic perspectives","authors":"Joke J.F.A. van Vugt ,&nbsp;Michael Ranes ,&nbsp;Coen Campsteijn ,&nbsp;Colin Logie","doi":"10.1016/j.bbaexp.2007.01.013","DOIUrl":"10.1016/j.bbaexp.2007.01.013","url":null,"abstract":"<div><p>ATP-dependent chromatin remodeling is performed by multi-subunit protein complexes. Over the last years, the identity of these factors has been unveiled in yeast and many parallels have been drawn with animal and plant systems, indicating that sophisticated chromatin transactions evolved prior to their divergence. Here we review current knowledge pertaining to the molecular mode of action of ATP-dependent chromatin remodeling, from single molecule studies to genome-wide genetic and proteomic studies. We focus on the budding yeast versions of SWI/SNF, RSC, DDM1, ISWI, CHD1, INO80 and SWR1.</p></div>","PeriodicalId":100161,"journal":{"name":"Biochimica et Biophysica Acta (BBA) - Gene Structure and Expression","volume":"1769 3","pages":"Pages 153-171"},"PeriodicalIF":0.0,"publicationDate":"2007-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.bbaexp.2007.01.013","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"26234322","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 53
In vivo footprinting analysis of the Glypican 3 (GPC3) promoter region in neuroblastoma cells 神经母细胞瘤细胞Glypican 3 (GPC3)启动子区域的体内足迹分析
Biochimica et Biophysica Acta (BBA) - Gene Structure and Expression Pub Date : 2007-03-01 DOI: 10.1016/j.bbaexp.2007.01.014
Gino Boily , Stéphane Ouellet , Sylvie Langlois , Mathieu Larivière , Régen Drouin , Daniel Sinnett
{"title":"In vivo footprinting analysis of the Glypican 3 (GPC3) promoter region in neuroblastoma cells","authors":"Gino Boily ,&nbsp;Stéphane Ouellet ,&nbsp;Sylvie Langlois ,&nbsp;Mathieu Larivière ,&nbsp;Régen Drouin ,&nbsp;Daniel Sinnett","doi":"10.1016/j.bbaexp.2007.01.014","DOIUrl":"10.1016/j.bbaexp.2007.01.014","url":null,"abstract":"<div><p>Glypican 3 (GPC3) is an X-linked gene that has its peak expression during development and is down-regulated in all studied tissues after birth. We have shown that GPC3 was expressed in neuroblastoma and Wilms' tumor. To understand the mechanisms regulating the transcription of this gene in neuroblastoma cells, we have focused our study on the identification of putative transcription factors binding the promoter. In this report we performed <em>in vivo</em> dimethylsulfate, UV type C irradiation and DNaseI footprinting analyses coupled with ligation-mediated PCR on nearly 1000 bp of promoter in two neuroblastoma cell lines, SJNB-7 (expressing GPC3) and SK-N-FI (not expressing GPC3). Nucleosome signature footprints were observed in the most distal part of the studied region in both cell lines. We detected eight large differentially protected regions, suggesting the presence of binding proteins in both cell lines but more DNA–protein interactions in GPC3-expressing cells. Sp1 was previously shown to be able to bind some of these regions. Here by combining electromobility shift assays and chromatin immunoprecipitations we showed that the transcription factor NFY was part of the DNA–protein complex found in footprinted regions upstream of the described minimal promoter. These studies performed on chromatin <em>in situ</em> suggest that NFY and yet unknown cell type-specific factors may play an important role in the regulation of GPC3.</p></div>","PeriodicalId":100161,"journal":{"name":"Biochimica et Biophysica Acta (BBA) - Gene Structure and Expression","volume":"1769 3","pages":"Pages 182-193"},"PeriodicalIF":0.0,"publicationDate":"2007-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.bbaexp.2007.01.014","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"26594509","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 6
The KH and S1 domains of Escherichia coli polynucleotide phosphorylase are necessary for autoregulation and growth at low temperature 大肠杆菌多核苷酸磷酸化酶的KH和S1结构域是低温下自我调节和生长所必需的
Biochimica et Biophysica Acta (BBA) - Gene Structure and Expression Pub Date : 2007-03-01 DOI: 10.1016/j.bbaexp.2007.01.008
Maura Epifanía Matus-Ortega , Maria Elena Regonesi , Alberto Piña-Escobedo , Paolo Tortora , Gianni Dehò , Jaime García-Mena
{"title":"The KH and S1 domains of Escherichia coli polynucleotide phosphorylase are necessary for autoregulation and growth at low temperature","authors":"Maura Epifanía Matus-Ortega ,&nbsp;Maria Elena Regonesi ,&nbsp;Alberto Piña-Escobedo ,&nbsp;Paolo Tortora ,&nbsp;Gianni Dehò ,&nbsp;Jaime García-Mena","doi":"10.1016/j.bbaexp.2007.01.008","DOIUrl":"10.1016/j.bbaexp.2007.01.008","url":null,"abstract":"<div><p>PNPase is a phosphate-dependent exonuclease of <em>Escherichia coli</em> required for growth in the cold. In this work we explored the effect of specific mutations in its two RNA binding domains KH and S1 on RNA binding, enzymatic activities, autoregulation and ability to grow at low temperature. We removed critical motifs that stabilize the hydrophobic core of each domain, as well as made a complete deletion of both (ΔKHS1) that severely impaired PNPase binding to RNA. Nevertheless, a residual RNA binding activity, possibly imputable to catalytic binding, could be observed even in the ΔKHS1 PNPase. These mutations also resulted in significant changes in the kinetic behavior of both phosphorolysis and polymerization activities of the enzyme, in particular for the double mutant Pnp-ΔKHS1-H. Additionally, PNPases with mutations in these RNA binding domains did not autoregulate efficiently and were unable to complement the growth defect of a chromosomal Δ<em>pnp</em> mutation at 18 °C. Based on these results it appears that in <em>E. coli</em> the RNA binding domains of PNPase, in particular the KH domain, are vital at low temperature, when the stem–loop structures present in the target mRNAs are more stable and a machinery capable to degrade structured RNA may be essential.</p></div>","PeriodicalId":100161,"journal":{"name":"Biochimica et Biophysica Acta (BBA) - Gene Structure and Expression","volume":"1769 3","pages":"Pages 194-203"},"PeriodicalIF":0.0,"publicationDate":"2007-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.bbaexp.2007.01.008","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"26639708","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 39
A 4.3 kb Smad7 promoter is able to specify gene expression during mouse development 一个4.3 kb的Smad7启动子能够在小鼠发育过程中指定基因表达
Biochimica et Biophysica Acta (BBA) - Gene Structure and Expression Pub Date : 2007-02-01 DOI: 10.1016/j.bbaexp.2007.01.001
Xubao Liu , Qian Chen , Chenzhong Kuang , Meiyu Zhang , Yiwen Ruan , Zao C. Xu , Zhenzhen Wang , Yan Chen
{"title":"A 4.3 kb Smad7 promoter is able to specify gene expression during mouse development","authors":"Xubao Liu ,&nbsp;Qian Chen ,&nbsp;Chenzhong Kuang ,&nbsp;Meiyu Zhang ,&nbsp;Yiwen Ruan ,&nbsp;Zao C. Xu ,&nbsp;Zhenzhen Wang ,&nbsp;Yan Chen","doi":"10.1016/j.bbaexp.2007.01.001","DOIUrl":"10.1016/j.bbaexp.2007.01.001","url":null,"abstract":"<div><p>Members of transforming growth factor-β (TGF-β) superfamily play important roles in diverse biological functions including early development. These extracellular factors exert their effects by interacting with membrane receptors followed by signal transduction by a group of Smad proteins. Smad7 is an inhibitory Smad protein that specifically antagonizes TGF-β and activin signaling. To characterize the developmental role of Smad7, a transgenic mouse model was generated using a 4.3 kb mouse Smad7 promoter driving β-galactosidase expression. In these mice, the Smad7 promoter defined a restrictive expression pattern of β-galactosidase in a tightly regulated temporal and spatial manner. The β-galactosidase gene was transiently expressed in the cardiovascular structures including heart cushion tissues and the endothelium of major arteries at E11.5 to E12.5. Through E12.5 to E17.5, β-galactosidase expression was prominently detected in the epithelium of developing cochlea and nasolacrimal duct. In addition, it was temporally expressed in trigeminal ganglion, the skeletal muscles surrounding major joints, primordium of the jaws, as well as genital tubercle. These studies indicated that the 4.3 kb Smad7 promoter contains sufficient regulatory elements to define controlled gene expression during mouse development.</p></div>","PeriodicalId":100161,"journal":{"name":"Biochimica et Biophysica Acta (BBA) - Gene Structure and Expression","volume":"1769 2","pages":"Pages 149-152"},"PeriodicalIF":0.0,"publicationDate":"2007-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.bbaexp.2007.01.001","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"26557926","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 10
Translational regulation of PGHS-1 mRNA: 5′ untranslated region and first two exons conferring negative regulation PGHS-1 mRNA的翻译调控:5 '非翻译区和前两个外显子给予负调控
Biochimica et Biophysica Acta (BBA) - Gene Structure and Expression Pub Date : 2007-02-01 DOI: 10.1016/j.bbaexp.2007.01.004
Natalia Bunimov, Jennifer Erin Smith, Dominique Gosselin, Odette Laneuville
{"title":"Translational regulation of PGHS-1 mRNA: 5′ untranslated region and first two exons conferring negative regulation","authors":"Natalia Bunimov,&nbsp;Jennifer Erin Smith,&nbsp;Dominique Gosselin,&nbsp;Odette Laneuville","doi":"10.1016/j.bbaexp.2007.01.004","DOIUrl":"10.1016/j.bbaexp.2007.01.004","url":null,"abstract":"<div><p><em>Prostaglandin endoperoxide H synthase-1</em> gene expression is described as inducible in a few contexts such as differentiation of megakaryoblastic MEG-01 cells into platelet-like structures. In the MEG-01 cells model of <em>PGHS-1</em> gene induction, we previously reported a delay in protein synthesis and identified the translational step of gene expression as being regulated. In the current study, we mapped PGHS-1 mRNA sequences regulating translational efficiency and identified an RNA binding protein. The 5′UTR and first two exons of the PGHS-1 5′ mRNA decreased the synthesis of Luciferase protein by approximately 80% without significant changes in mRNA levels when compared to controls. Both the PGHS-1 5′-UTR and the first two exons were required for activity. Sucrose density gradient fractionations of cytoplasmic extracts from MEG-01 cells infected with reporter constructs, either controls or containing PGHS-1 sequence, presented a similar profile of distribution of reporter transcripts between polysomal and non-polysomal fractions. RNA/protein interaction studies revealed nucleolin binding to the 135 nt PGHS-1 sequence. Mutation of the two NRE elements located in the 5′end of PGHS-1 mRNA sequence partially reduced the negative activity of the 135 nt sequence. Stable secondary structures predicted at the 5′ end of the transcript are potentially involved in translational regulation. We propose that the 5′end of PGHS-1 mRNA represses translation and could delay the synthesis of PGHS-1 enzyme.</p></div>","PeriodicalId":100161,"journal":{"name":"Biochimica et Biophysica Acta (BBA) - Gene Structure and Expression","volume":"1769 2","pages":"Pages 92-105"},"PeriodicalIF":0.0,"publicationDate":"2007-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.bbaexp.2007.01.004","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"26570944","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 17
Expression profiling by whole-genome microarray hybridization reveals differential gene expression in breast cancer cell lines after lycopene exposure 全基因组微阵列杂交的表达谱揭示了番茄红素暴露后乳腺癌细胞系基因表达的差异
Biochimica et Biophysica Acta (BBA) - Gene Structure and Expression Pub Date : 2007-02-01 DOI: 10.1016/j.bbaexp.2007.01.007
Nasséra Chalabi , Samir Satih , Laetitia Delort , Yves-Jean Bignon , Dominique J. Bernard-Gallon
{"title":"Expression profiling by whole-genome microarray hybridization reveals differential gene expression in breast cancer cell lines after lycopene exposure","authors":"Nasséra Chalabi ,&nbsp;Samir Satih ,&nbsp;Laetitia Delort ,&nbsp;Yves-Jean Bignon ,&nbsp;Dominique J. Bernard-Gallon","doi":"10.1016/j.bbaexp.2007.01.007","DOIUrl":"10.1016/j.bbaexp.2007.01.007","url":null,"abstract":"<div><p>The correlation between diet and variation in gene-expression is an important field which could be considered to approach cancer pathways comprehension. We examined the effects of lycopene on breast cancer cell lines using pangenomic arrays. Lycopene is derived predominantly from tomatoes and tomato products and there is some epidemiologic evidence for a preventive role in breast cancer. Previously, we investigated lycopene in breast cancer using a dedicated breast cancer microarray. To confirm these results and explore pathways other than those implicated in breast cancer, for this study we used pangenomic arrays containing 25,000 oligonucleotides. This <em>in vitro</em> study assayed two human mammary cancer cell lines (MCF-7 and MDA-MB-231), and a fibrocystic breast cell line (MCF-10a) treated or not with 10 μM lycopene for 48 h. A competitive hybridization was performed between Cy3-labeled lycopene treated RNA and Cy5-labeled untreated RNA to define differentially expressed genes. Using <em>t</em>-test analysis, a subset of 391 genes was found to be differentially modulated by lycopene between estrogen-positive cells (MCF-7) and estrogen-negative cells (MDA-MB-231, MCF-10a). Hierarchical clustering revealed 726 discriminatory genes between breast cancer cell lines (MCF-7, MDA-MB-231) and the fibrocystic breast cell line (MCF-10a). Modified gene expression was observed in various molecular pathways, such as apoptosis, cell communication, MAPK and cell cycle as well as xenobiotic metabolism, fatty acid biosynthesis and gap junctional intercellular communication.</p></div>","PeriodicalId":100161,"journal":{"name":"Biochimica et Biophysica Acta (BBA) - Gene Structure and Expression","volume":"1769 2","pages":"Pages 124-130"},"PeriodicalIF":0.0,"publicationDate":"2007-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.bbaexp.2007.01.007","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"26571923","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 39
Effects of 5′ untranslated region diversity on the posttranscriptional regulation of the human reduced folate carrier 5 '非翻译区多样性对人叶酸载体转录后调控的影响
Biochimica et Biophysica Acta (BBA) - Gene Structure and Expression Pub Date : 2007-02-01 DOI: 10.1016/j.bbaexp.2006.12.006
Scott G. Payton , Christina L. Haska , Robin M. Flatley , Yubin Ge , Larry H. Matherly
{"title":"Effects of 5′ untranslated region diversity on the posttranscriptional regulation of the human reduced folate carrier","authors":"Scott G. Payton ,&nbsp;Christina L. Haska ,&nbsp;Robin M. Flatley ,&nbsp;Yubin Ge ,&nbsp;Larry H. Matherly","doi":"10.1016/j.bbaexp.2006.12.006","DOIUrl":"10.1016/j.bbaexp.2006.12.006","url":null,"abstract":"<div><p>The human RFC (hRFC) gene is regulated by five major 5′ non-coding exons, characterized by alternate transcription start sites and splice forms. The result is up to 14 hRFC transcripts for which different 5′ untranslated regions (UTRs) are fused to a common coding sequence. By <em>in vitro</em> translation assays with hRFC constructs corresponding to the major transcript forms, most of the forms were translated poorly. Upon expression of the 5′UTR-hRFC constructs in hRFC-null HeLa cells, a range of steady state hRFC proteins and transcripts were detected that reflected relative transcript stabilities and, to a lesser extent, translation efficiencies. Transcripts including 5′ UTRs derived from non-coding exon A encoded a modified hRFC protein translated from an upstream initiation site. When this modified hRFC protein was expressed in hRFC-null K562 cells, there were only minor differences in surface targeting, stability, or transport function from wild type hRFC. Our results demonstrate an important role for posttranscriptional determinants of cellular hRFC levels and activity.</p></div>","PeriodicalId":100161,"journal":{"name":"Biochimica et Biophysica Acta (BBA) - Gene Structure and Expression","volume":"1769 2","pages":"Pages 131-138"},"PeriodicalIF":0.0,"publicationDate":"2007-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.bbaexp.2006.12.006","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"26557927","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 26
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