- Open Access
Characterizing dynamic regulatory programs in mouse lung development and their potential association with tumourigenesis via miRNA-TF-mRNA circuits
© Liu et al.; licensee BioMed Central Ltd. 2013
- Published: 17 December 2013
In dynamic biological processes, genes, transcription factors(TF) and microRNAs(miRNAs) play vital regulation roles. Many researchers have focused on the transcription factors or miRNAs in transcriptional or post transcriptional stage, respectively. However, the transcriptional regulation and post transcriptional regulation is not isolated in the whole dynamic biological processes, there are few reserchers who have tried to consider the network composed by genes, miRNAs and TFs in this dynamic biological processes, especially in the mouse lung development. Moreover, it is widely acknowledged that cancer is a kind of developmental disorders, and some of pathways involved in tissue development might be also implicated in causing cancer. Although it has been found that many genes differentially expressed during mouse lung development are also differentially expressed in lung cancer, very little work has been reported to elucidate the combinational regulatory programs of such kind of associations.
In order to investigate the association of transcriptional and post-transcriptional regulating activities in the mouse lung development, we define the significant triple relations among miRNAs, TFs and mRNAs as circuits. From the lung development time course data GSE21053, we mine 142610 circuit candidates including 96 TFs, 129 miRNAs and 13403 genes. After removing genes with little variation along different time points, we finally find 64760 circuit candidates, containing 8299 genes, 50 TFs, and 118 miRNAs in total. Further analysis on the circuits shows that the circuits vary in different stages of the lung development and play different roles. By investigating the circuits in the context of lung specific genes, we identify out the regulatory combinations for lung specific genes, as well as for those lung non-specific genes. Moreover, we show that the lung non-specific genes involved circuits are functionally related to the lung development. Noticing that some tissue developmental systems may be involved in tumourigenesis, we also check the cancer genes involved circuits, trying to find out their regulatory program, which would be useful for the research of lung cancer.
The relevant transcriptional or post-transcriptional factors and their roles involved in the mouse lung development are both changed greatly in different stages. By investigating the cancer genes involved circuits, we can find miRNAs/TFs playing important roles in tumour progression. Therefore, the miRNA-TF-mRNA circuits can be used in wide translational biomedicine studies, and can provide potential drug targets towards the treatment of lung cancer.
- Cancer Gene
- Lung Development
- Regulatory Combination
- Cancer Gene Census
- Circuit Candidate
Although it is not completely understood what and how many factors play main roles in the process of lung development, several factors that invovle in the dynamic process and play important roles have been confirmed by the biologist. Through analysis of gene expression data at different stages of lung development in the field of molecular biology, a series of novel temporal regulations, target genes, transcription factors, and candidate regulatory pathways have been observed during these dynamic biological processions [1, 2]. The mammalian lung development can be divided into six stages, ranging from embryos to mature lung [1, 3]. At these different stages of lung development, the involved regulatory elements should include both housekeeping and stage-specific ones.
It is well known that transcription factors (TFs) and microRNAs (miRNAs) are key regulators for gene expression regulation in high eukaryotes. The transcription factor play a key role in the transcription process which controls the activity of a gene by determining whether the gene's DNA is transcribed. The first step of the process of transcription is to convert the gene's DNA into a complementary coding mRNA molecule; then in the second step, the mRNA molecule is translated as an amino acid sequence of a protein . While, miRNAs are a class of short RNA (21-24 nt) sequences that can regulate the expression of target genes at the post-transcriptional level . Based on the pairing of miRNAs and their target sites on corresponding mRNAs, the complexes can inhibit translation by either degrading the mRNAs, or by blocking translation without degrading the targets .
There have been many studies focusing on investigating the functions of miRNAs or TFs, respectively. For examples, Dong et al. investigated the dynamical miRNA and mRNA regulation patterns for lung development by using statistical and computational methods . Bandyopadhyay et al. obtained a global perspective of miRNA dysregulation in multiple cancer types by analyzing the differential expression patterns of specific miRNAs in cancer tissues . There are also some studies considering the miRNA regulatory network [8–10] or TFs and target genes regulatory networks . As a result, many computational tools have been proposed to predict the miRNA-mRNA regulations (EMBL , Miranda , SNMNMF[14, 15], PicTar , mirConnX , and TargetScan ), or the TF-mRNA regulations (TRRD, JASPAR, and TRANSFAC [21, 22]). Recently there are several attempts to discover the combinational links between miRNAs, TFs and target mRNAs (genes) [23–26], however, it is obviously that not enough attentions are paid on the regulatory combinations to understand the molecular mechanism of the complicated biological processes. In our preliminary version of this work , we have proposed a methodology to consider the regulatory combinations involved in the mouse lung development, and found some regulatory combinations in different lung developmental stages. Our earlier work has only considered the context of lung specific genes. However, the lung developmental process is complicated, which may be involved in not only lung specific but also lung non-specific genes and their regulators. Therefore, not just lung specific genes, but other tissue genes should also be considered to systematically investigate the regulatory mechanism of lung development.
It is widely acknowledged that cancer is a kind of complex developmental disorders, and some controlling developmental systems might also be involved in causing cancer. Lung cancer is the highest mortality cancer  and thus has recently attracted more and more attentions. Bonner et al.  have examined the genetic changes occurring during lung carcinogenesis by analyzing tissues from mice normal lungs and cancers on Affymetrix U74Av2 gene chips, and found that 24 developmentally regulated genes are aberrantly expressed in lung tumours. Kopantzev et al. [29, 30] have found that opposite differences by comparing gene expression profiles in human non-small cell lung carcinomas and in human fetal lung development. Understanding the association of the regulatory mechanisms between lung development and lung tumour might provide novel insight of the lung carcinogenesis, which is helpful for the treatment of the lung cancer.
To address above questions, in this paper we define the significant triple relation among miRNA, TF and mRNA as a circuit, and propose to detect the circuits to identify the non-trivial regulatory combinations in the lung development of mouse. Then we analyze the combinations across the lung development and find out stage-specific combinations. According to the lung specific genes collected from the tissue specific gene database TiSGeD , we further distinguish circuits specific to lung development from those irrelevant to the lung developmental process. Finally, we consider the genes that have been shown to be related to cancers in literature and investigate their involved circuitsto find out the multiple roles of miRNAs and TFs in lung development and tumour progression. Our results give a systematic view for understanding the alteration of transcriptional or post-transcriptional regulatory factors and their roles involved in the mouse lung development and tumour progression.
(1) Lung development time-course data collected from two mouse samples: GSE21053 . GSE21053 consists of GSE20152 and GSE20954, corresponding to miRNA and gene expression data respectively. The expression values are measured at seven time points: embryo day 12, 14, 16, and 18; and postnatal day 2, 10 and 30.
(2) Lung specific genes: The Tissue-Specific Genes Database (TiSGeD) . TiSGeD provides comprehensive information of genes specific to lung and other tissues collected from biomedical literatures. By setting SPM  threshold as 0.3, we extract 511 lung specific genes from TiSGeD, 455 of them are in common with GSE20954 and will be used for further study.
(3) Cancer related genes: we collect all the 487 cancer related genes from Cancer Gene Census, 118 of which are overlapped with the lung developmental genes, and 19 of which are also found to be lung specific genes.
(6) miRNA-TF pairs: circuitDB .
Extraction of miRNA-TF-mRNA circuit candidates
Detection of significant circuits relevant to lung development
where E is the mathematical expectation and μ i is the mean of vector i. We use the permutation test to evaluate the significance of the correlation and set the p-value threshold as 0.05. Only when all of three pairs in the same circuit candidate are significant, can it be regarded as a circuit at the specific period of lung development.
Dynamic circuits involved in the lung development
TF overlap (Figure 5(b))
We have found that there are four TFs: BACH2, IRF1, MYC and HOXA4, which are participated in the early and late stages. BACH2 and HOXA4 are down-regulated in the early stage and up-regulated in the late stage (HOXA4 is one point time lagged); and IRF1 is up-regulated while MYC is down-regulated across all the time points (Figure 7(a)). It has been shown that Hox genes are implicated in the lung development and the patterning, and the HOXA4 and HOXA5 are likely to be involved in the patterning of the mouse lung . According to the GO term GO:0048513, IRF1 and MYC also have the function related to the organ development. It is noticeable that MYC amplification is found to be a prognostic marker of early-stage lung adenocarcinoma , and BACH2 has also been researched in the cancer treatment , which shows that the tumour has association with the developmental process.
MiRNA overlap (Figure 5(c))
We have found that there are five miRNAs participated in both the early and late stages: mmu-mir-200a, mmu-mir-200b, mmu-mir-135b, mmu-mir-494 and mmu-mir-503. They show similar expression profiles along six time points of the lung development: first down-regulated and then up-regulated (Figure 7(b)). The miR-200 family is believed to play an essential role in the tumour suppression. It has been shown to play an important role in fibrotic lung diseases . The mir-135b, mir-503b and mir-94 are also found to have relationship with lung cancer [42–44]. We think that miRNAs related to cancers may more likely participate in regulatory programs of both lung developmental stages.
Gene overlap (Figure 5(d))
We have found that there are 24 common genes roughly divided into two groups (Prdx6, B3gnt2, Car3, Cbx1, Ccdc88a, Cdh13, Cpeb1, Cth, Dclk1, Dnajc9, Fgd4, Il1rap, Ipo9, Klf4, Klhl29, Mpp7, Pde7a, Pdk4, Per1, Phf20, Plat, Rnf138, Rtn4, Tdrkh) occurring in the early and late stages (Figure 7(c)). It has been shown that most of them are related to tumours, such as Prdx6 , Cdh13 , Klf4 , and so on. Once again, we suggest that common genes in early and late stages of lung development may be more likely related to tumourigenesis even if they are not shown to be cancer genes.
Dynamic regulations of circuits in the context of lung specific genes
Specifically, we have detected out some regulators for lung non-specific genes, i.e., TF: ATF6, DBP (early), and TBP (late); miRNAs: mmu-mir-152, mmu-mir-187, mmu-mir-320, mmu-mir-326, mmu-mir-451 (early), and mmu-mir-494 (late). We think that they should have functions related to the lung development even though their regulating genes are not lung specific. For examples, ATF6 is an endoplasmic reticulum (ER) stress-regulated transmembrane transcription factor, and specific ER stress signaling transmitted by ATF6 leads to naturally occurring apoptosis during the muscle development ; DBP is a multifunctional protein found in plasma, ascitic fluid, cerebrospinal fluid, and urine and on the surface of many cell types; miR-320 plays a role in neuronal development. According to the functional annotations of the regulators, it seems that they can actually play roles in the lung development in an indirect way.
From Figure 10, we can see that different group of genes involved in early and late stages of the lung development, regulated by different TF-miRNA combinations. Moreover, some common genes/TFs/miRNAs involved in different stages show different functions. Gene Prdx6 is involved in one circuit in the early stage (IRF1~mmu-mir-503~Prdx6), while involved in the other two circuits containing the same miRNA (MYC~mmu-mir-19a~Prdx6, IRF1~mmu-mir-19a~Prdx6) in the late stage. Thus, in different stages of the lung development, Prdx6 may show different functions which are mainly determined by mmu-mir-503 and mmu-mir-19a, respectively.
We have also noted that mmu-mir-200a play some roles in the early stage by cooperating with MEIS1, while play other roles in the late stage by cooperating with BRCA1 together. By cooperating with different miRNAs, transcript factors BACH2, MYC or IF1 can co-regulate different genes in the early and late stages, respectively.
Functional specificities of circuits in lung development
We have found that the miRNA and the TF usually have dynamical regulation programs at different stages during mouse lung development. In particular, the involved genes usually have opposite expression profiles at different stages (Figure 4). To computationally explore the potential functions of the dynamically regulated genes in lung development, we have employed biological process and pathway analysis on the lung specific genes.
Top 10 GO biological process terms in different periods
GO:0006793~phosphorus metabolic process
GO:0006796~phosphate metabolic process
GO:0045596~negative regulation of cell differentiation
GO:0051056~regulation of small GTPase mediated signal transduction
GO:0006468~protein amino acid phosphorylation
GO:0035023~regulation of Rho protein signal transduction
GO:0007167~enzyme linked receptor protein signaling pathway
GO:0022604~regulation of cell morphogenesis
GO:0051094~positive regulation of developmental process
GO:0030030~cell projection organization
GO:0017148~negative regulation of translation
GO:0010558~negative regulation of macromolecule biosynthetic process
GO:0010608~posttranscriptional regulation of gene expression
GO:0032268~regulation of cellular protein metabolic process
GO:0031327~negative regulation of cellular biosynthetic process
GO:0051674~localization of cell
Significant pathways in different periods
mmu04810:Regulation of actin cytoskeleton
mmu04115:p53 signaling pathway
mmu05200:Pathways in cancer
mmu04060:Cytokine-cytokine receptor interaction
mmu00533:Keratan sulfate biosynthesis
In Table 2, the pathways indicated in bold have been reported to be associated with lung. For mmu04810, Actin cytoskeleton plays a role in human pulmonary artery ECS . For mmu00740, lung remodelling induced by exposure of total parenteral nutrition to ambient light is due to the interaction between vitamin C and peroxides generated by the exposure of riboflavin to light . For mmu04060, the analysis of lung adenocarcinoma tissue specimens have demonstrated that the genes involved in these biological pathways have high rates of over-expression . For mmu00230, metabolic changes in the lung as a result of ventilation-induced lung injury are reflected by an increased level of purine in the bronchoalveolar lavage fluid and that purine may, thus, serve as an early marker for ventilation-induced lung injury . For mmu00533, the pathways of Keratan sulphate biosynthesis are associated with prostate cancer and small cell lung cancer.
Investigation on cancer genes involved in circuits
In this work, we have mined and investigated the miRNA-TF-mRNA circuits involve in mouse lung development. The results have shown that the relevant transcriptional or post-transcriptional factors and their roles involved in lung development greatly vary at different stages. By considering those circuits associated with lung specific genes, we have identified out the dynamic regulatory interaction of miRNA-TF-mRNA circuits in different lung development stages. By investigating the circuits in the context of cancer genes, we have detected out some circuits related to the lung cancer, thus illustrating the association between the lung development and the tumourigenesis. Therefore, the miRNA-TF-mRNA circuits can be used in wide translational biomedicine studies, and can provide potential drug targets towards the treatment of lung cancer.
A preliminary version of this paper was published in the proceedings of IEEE ISB2012.
The publication of this article has been funded by the National Science Foundation of China (61272274, 60970063), the program for New Century Excellent Talents in Universities (NCET-10-0644), the Ph.D. Programs Foundation of Ministry of Education of China (20090141110026) and the Fundamental Research Funds for the Central Universities (6081007).
This article has been published as part of BMC Systems Biology Volume 7 Supplement 2, 2013: Selected articles from The 6th International Conference of Computational Biology. The full contents of the supplement are available online at http://www.biomedcentral.com/bmcsystbiol/supplements/7/S2.
- Bonner AE, Lemon WJ, You M: Gene expression signatures identify novel regulatory pathways during murine lung development: implications for lung tumorigenesis. Journal of medical genetics. 2003, 40 (6): 408-417. 10.1136/jmg.40.6.408.PubMed CentralView ArticlePubMedGoogle Scholar
- Weng T, Chen Z, Jin N, Gao L, Liu L: Gene expression profiling identifies regulatory pathways involved in the late stage of rat fetal lung development. American journal of physiology Lung cellular and molecular physiology. 2006, 291 (5): L1027-1037. 10.1152/ajplung.00435.2005.View ArticlePubMedGoogle Scholar
- Ten Have-Opbroek AA: Lung development in the mouse embryo. Experimental lung research. 1991, 17 (2): 111-130. 10.3109/01902149109064406.View ArticlePubMedGoogle Scholar
- Vaquerizas JM, Kummerfeld SK, Teichmann SA, Luscombe NM: A census of human transcription factors: function, expression and evolution. Nature reviews Genetics. 2009, 10 (4): 252-263. 10.1038/nrg2538.View ArticlePubMedGoogle Scholar
- Bartel DP: MicroRNAs: target recognition and regulatory functions. Cell. 2009, 136 (2): 215-233. 10.1016/j.cell.2009.01.002.PubMed CentralView ArticlePubMedGoogle Scholar
- Dong J, Jiang G, Asmann YW, Tomaszek S, Jen J, Kislinger T, Wigle DA: MicroRNA networks in mouse lung organogenesis. PloS one. 2010, 5 (5): e10854.-10.1371/journal.pone.0010854.PubMed CentralView ArticlePubMedGoogle Scholar
- Bandyopadhyay S, Mitra R, Maulik U, Zhang MQ: Development of the human cancer microRNA network. Silence. 2010, 1 (1): 6.-10.1186/1758-907X-1-6.PubMed CentralView ArticlePubMedGoogle Scholar
- Volinia S, Galasso M, Costinean S, Tagliavini L, Gamberoni G, Drusco A, Marchesini J, Mascellani N, Sana ME, Abu Jarour R: Reprogramming of miRNA networks in cancer and leukemia. Genome Res. 2010, 20 (5): 589-599. 10.1101/gr.098046.109.PubMed CentralView ArticlePubMedGoogle Scholar
- Rubio-Somoza I, Weigel D: MicroRNA networks and developmental plasticity in plants. Trends in plant science. 2011, 16 (5): 258-264. 10.1016/j.tplants.2011.03.001.View ArticlePubMedGoogle Scholar
- Olde Loohuis NF, Kos A, Martens GJ, Van Bokhoven H, Nadif Kasri N, Aschrafi A: MicroRNA networks direct neuronal development and plasticity. Cellular and molecular life sciences: CMLS. 2012, 69 (1): 89-102. 10.1007/s00018-011-0788-1.PubMed CentralView ArticlePubMedGoogle Scholar
- Li J, Liu ZJ, Pan YC, Liu Q, Fu X, Cooper NG, Li Y, Qiu M, Shi T: Regulatory module network of basic/helix-loop-helix transcription factors in mouse brain. Genome biology. 2007, 8 (11): R244.-10.1186/gb-2007-8-11-r244.PubMed CentralView ArticlePubMedGoogle Scholar
- Stark A, Brennecke J, Bushati N, Russell RB, Cohen SM: Animal MicroRNAs confer robustness to gene expression and have a significant impact on 3'UTR evolution. Cell. 2005, 123 (6): 1133-1146. 10.1016/j.cell.2005.11.023.View ArticlePubMedGoogle Scholar
- Betel D, Wilson M, Gabow A, Marks DS, Sander C: The microRNA.org resource: targets and expression. Nucleic acids research. 2008, 36 (Database): D149-153.PubMed CentralView ArticlePubMedGoogle Scholar
- Zhang SH, Li QJ, Liu J, Zhou JXH: A novel computational framework for simultaneous integration of multiple types of genomic data to identify microRNA-gene regulatory modules. Bioinformatics. 2011, 27 (ISMB 2011): 9.-Google Scholar
- Zhang S, Liu CC, Li W, Shen H, Laird PW, Zhou XJ: Discovery of multidimensional modules by integrative analysis of cancer genomic data. Nucleic acids research. 2012, 40 (19): 9379-9391. 10.1093/nar/gks725.PubMed CentralView ArticlePubMedGoogle Scholar
- Lall S, Grun D, Krek A, Chen K, Wang YL, Dewey CN, Sood P, Colombo T, Bray N, Macmenamin P: A genome-wide map of conserved microRNA targets in C. elegans. Current biology: CB. 2006, 16 (5): 460-471. 10.1016/j.cub.2006.01.050.View ArticlePubMedGoogle Scholar
- Huang GT, Athanassiou C, Benos PV: mirConnX: condition-specific mRNA-microRNA network integrator. Nucleic acids research. 2011, 39 (Web Server): W416-423.PubMed CentralView ArticlePubMedGoogle Scholar
- Friedman RC, Farh KK, Burge CB, Bartel DP: Most mammalian mRNAs are conserved targets of microRNAs. Genome research. 2009, 19 (1): 92-105.PubMed CentralView ArticlePubMedGoogle Scholar
- Stepanenko I, Kolchanov N: Apoptosis gene network: description in the GeneNet and TRRD databases. Annals of the New York Academy of Sciences. 2003, 1010: 16-18. 10.1196/annals.1299.003.View ArticlePubMedGoogle Scholar
- Portales-Casamar E, Thongjuea S, Kwon AT, Arenillas D, Zhao X, Valen E, Yusuf D, Lenhard B, Wasserman WW, Sandelin A: JASPAR 2010: the greatly expanded open-access database of transcription factor binding profiles. Nucleic acids research. 2010, 38 (Database): D105-110. 10.1093/nar/gkp950.PubMed CentralView ArticlePubMedGoogle Scholar
- Wingender E: The TRANSFAC project as an example of framework technology that supports the analysis of genomic regulation. Briefings in bioinformatics. 2008, 9 (4): 326-332. 10.1093/bib/bbn016.View ArticlePubMedGoogle Scholar
- Peter ME: Targeting of mRNAs by multiple miRNAs: the next step. Oncogene. 2010, 29 (15): 2161-2164. 10.1038/onc.2010.59.View ArticlePubMedGoogle Scholar
- Re A, Cora D, Taverna D, Caselle M: Genome-wide survey of microRNA-transcription factor feed-forward regulatory circuits in human. Molecular bioSystems. 2009, 5 (8): 854-867. 10.1039/b900177h.PubMed CentralView ArticlePubMedGoogle Scholar
- Eduati F, Di Camillo B, Karbiener M, Scheideler M, Cora D, Caselle M, Toffolo G: Dynamic modeling of miRNA-mediated feed-forward loops. Journal of computational biology: a journal of computational molecular cell biology. 2012, 19 (2): 188-199. 10.1089/cmb.2011.0274.View ArticleGoogle Scholar
- Brosh R, Shalgi R, Liran A, Landan G, Korotayev K, Nguyen GH, Enerly E, Johnsen H, Buganim Y, Solomon H: p53-Repressed miRNAs are involved with E2F in a feed-forward loop promoting proliferation. Molecular systems biology. 2008, 4: 229-PubMed CentralView ArticlePubMedGoogle Scholar
- O'Donnell KA, Wentzel EA, Zeller KI, Dang CV, Mendell JT: c-Myc-regulated microRNAs modulate E2F1 expression. Nature. 2005, 435 (7043): 839-843. 10.1038/nature03677.View ArticlePubMedGoogle Scholar
- Ye XH, Liu J, Wu FX: Dynamic miRNA-TF-mRNA circuits in mouse lung development. 2012 IEEE 6th International Conference on Systems Biology (ISB): 18-20 Aug.; Xi'an, China. 2012, IEEE press, 256-262.View ArticleGoogle Scholar
- Siegel R, Naishadham D, Jemal A: Cancer statistics, 2012. CA: a cancer journal for clinicians. 2012, 62 (1): 10-29. 10.3322/caac.20138.Google Scholar
- Bonner AE, Lemon WJ, Devereux TR, Lubet RA, You M: Molecular profiling of mouse lung tumors: association with tumor progression, lung development, and human lung adenocarcinomas. Oncogene. 2004, 23 (5): 1166-1176. 10.1038/sj.onc.1207234.View ArticlePubMedGoogle Scholar
- Kopantzev EP, Monastyrskaya GS, Vinogradova TV, Zinovyeva MV, Kostina MB, Filyukova OB, Tonevitsky AG, Sukhikh GT, Sverdlov ED: Differences in gene expression levels between early and later stages of human lung development are opposite to those between normal lung tissue and non-small lung cell carcinoma. Lung Cancer. 2008, 62 (1): 23-34. 10.1016/j.lungcan.2008.02.011.View ArticlePubMedGoogle Scholar
- Xiao SJ, Zhang C, Zou Q, Ji ZL: TiSGeD: a database for tissue-specific genes. Bioinformatics. 2010, 26 (9): 1273-1275. 10.1093/bioinformatics/btq109.PubMed CentralView ArticlePubMedGoogle Scholar
- Ye X, Liu J, Wu F-X: Dynamic miRNA-TF-mRNA circuits in mouse lung development. 2012 IEEE 6th International Conference on Systems Biology (ISB). 2012, 256-262.View ArticleGoogle Scholar
- Futreal PA, Coin L, Marshall M, Down T, Hubbard T, Wooster R, Rahman N, Stratton MR: A census of human cancer genes. Nature reviews Cancer. 2004, 4 (3): 177-183. 10.1038/nrc1299.PubMed CentralView ArticlePubMedGoogle Scholar
- Betel D, Koppal A, Agius P, Sander C, Leslie C: Comprehensive modeling of microRNA targets predicts functional non-conserved and non-canonical sites. Genome biology. 2010, 11 (8): R90.-10.1186/gb-2010-11-8-r90.PubMed CentralView ArticlePubMedGoogle Scholar
- Friard O, Re A, Taverna D, De Bortoli M, Cora D: CircuitsDB: a database of mixed microRNA/transcription factor feed-forward regulatory circuits in human and mouse. BMC Bioinformatics. 2010, 11: 435-10.1186/1471-2105-11-435.PubMed CentralView ArticlePubMedGoogle Scholar
- Tanabe M, Kanehisa M: Using the KEGG Database Resource. Current protocols in bioinformatics/editoral board, Andreas D Baxevanis [et al]. 2012, Chapter 1: :Unit1 12Google Scholar
- Zhao F, Xuan Z, Liu L, Zhang MQ: TRED: a Transcriptional Regulatory Element Database and a platform for in silico gene regulation studies. Nucleic acids research. 2005, 33 (Database): D103-107.PubMed CentralPubMedGoogle Scholar
- Packer AI, Mailutha KG, Ambrozewicz LA, Wolgemuth DJ: Regulation of the Hoxa4 and Hoxa5 genes in the embryonic mouse lung by retinoic acid and TGFbeta1: implications for lung development and patterning. Developmental dynamics: an official publication of the American Association of Anatomists. 2000, 217 (1): 62-74. 10.1002/(SICI)1097-0177(200001)217:1<62::AID-DVDY6>3.0.CO;2-U.View ArticleGoogle Scholar
- Iwakawa R, Kohno T, Kato M, Shiraishi K, Tsuta K, Noguchi M, Ogawa S, Yokota J: MYC amplification as a prognostic marker of early-stage lung adenocarcinoma identified by whole genome copy number analysis. Clinical cancer research: an official journal of the American Association for Cancer Research. 2011, 17 (6): 1481-1489. 10.1158/1078-0432.CCR-10-2484.View ArticleGoogle Scholar
- Kamio T, Toki T, Kanezaki R, Sasaki S, Tandai S, Terui K, Ikebe D, Igarashi K, Ito E: B-cell-specific transcription factor BACH2 modifies the cytotoxic effects of anticancer drugs. Blood. 2003, 102 (9): 3317-3322. 10.1182/blood-2002-12-3656.View ArticlePubMedGoogle Scholar
- Yang S, Banerjee S, de Freitas A, Sanders YY, Ding Q, Matalon S, Thannickal VJ, Abraham E, Liu G: Participation of miR-200 in pulmonary fibrosis. The American journal of pathology. 2012, 180 (2): 484-493. 10.1016/j.ajpath.2011.10.005.PubMed CentralView ArticlePubMedGoogle Scholar
- Bourdon JA, Saber AT, Halappanavar S, Jackson PA, Wu D, Hougaard KS, Jacobsen NR, Williams A, Vogel U, Wallin H: Carbon black nanoparticle intratracheal installation results in large and sustained changes in the expression of miR-135b in mouse lung. Environ Mol Mutagen. 2012, 53 (6): 462-468. 10.1002/em.21706.View ArticlePubMedGoogle Scholar
- Patnaik SK, Kannisto E, Knudsen S, Yendamuri S: Evaluation of microRNA expression profiles that may predict recurrence of localized stage I non-small cell lung cancer after surgical resection. Cancer research. 2010, 70 (1): 36-45. 10.1158/0008-5472.CAN-09-3153.View ArticlePubMedGoogle Scholar
- Romano G, Acunzo M, Garofalo M, Di Leva G, Cascione L, Zanca C, Bolon B, Condorelli G, Croce CM: MiR-494 is regulated by ERK1/2 and modulates TRAIL-induced apoptosis in non-small-cell lung cancer through BIM down-regulation. Proceedings of the National Academy of Sciences of the United States of America. 2012, 109 (41): 16570-16575. 10.1073/pnas.1207917109.PubMed CentralView ArticlePubMedGoogle Scholar
- Yang D, Bai CX, Wang X, An XJ, Tong L, Bi J: [Roles of peroxiredoxin 6 in the regulation of oxidative stress to lipopolysaccharide-induced acute lung injury]. Zhonghua jie he he hu xi za zhi = Zhonghua jiehe he huxi zazhi = Chinese journal of tuberculosis and respiratory diseases. 2011, 34 (9): 679-683.PubMedGoogle Scholar
- Ulivi P, Zoli W, Calistri D, Fabbri F, Tesei A, Rosetti M, Mengozzi M, Amadori D: p16INK4A and CDH13 hypermethylation in tumor and serum of non-small cell lung cancer patients. J Cell Physiol. 2006, 206 (3): 611-615. 10.1002/jcp.20503.View ArticlePubMedGoogle Scholar
- Zhou Y, Hofstetter WL, He Y, Hu W, Pataer A, Wang L, Wang J, Yu L, Fang B, Swisher SG: KLF4 inhibition of lung cancer cell invasion by suppression of SPARC expression. Cancer biology & therapy. 2010, 9 (7): 507-513. 10.4161/cbt.9.7.11106.View ArticleGoogle Scholar
- Nakanishi K, Sudo T, Morishima N: Endoplasmic reticulum stress signaling transmitted by ATF6 mediates apoptosis during muscle development. The Journal of cell biology. 2005, 169 (4): 555-560. 10.1083/jcb.200412024.PubMed CentralView ArticlePubMedGoogle Scholar
- White RE, Giffard RG: MicroRNA-320 induces neurite outgrowth by targeting ARPP-19. Neuroreport. 2012, 23 (10): 590-595. 10.1097/WNR.0b013e3283540394.PubMed CentralView ArticlePubMedGoogle Scholar
- Huang da W, Sherman BT, Lempicki RA: Bioinformatics enrichment tools: paths toward the comprehensive functional analysis of large gene lists. Nucleic acids research. 2009, 37 (1): 1-13. 10.1093/nar/gkn923.PubMed CentralView ArticlePubMedGoogle Scholar
- Xu CX, Jin H, Chung YS, Shin JY, Hwang SK, Kwon JT, Park SJ, Lee ES, Minai-Tehrani A, Chang SH: Low dietary inorganic phosphate affects the lung growth of developing mice. Journal of veterinary science. 2009, 10 (2): 105-113. 10.4142/jvs.2009.10.2.105.PubMed CentralView ArticlePubMedGoogle Scholar
- Nagaoka T, Gebb SA, Karoor V, Homma N, Morris KG, McMurtry IF, Oka M: Involvement of RhoA/Rho kinase signaling in pulmonary hypertension of the fawn-hooded rat. J Appl Physiol. 2006, 100 (3): 996-1002.View ArticlePubMedGoogle Scholar
- Cloutier M, Tremblay M, Piedboeuf B: ROCK2 is involved in accelerated fetal lung development induced by in vivo lung distension. Pediatric pulmonology. 2010, 45 (10): 966-976. 10.1002/ppul.21266.View ArticlePubMedGoogle Scholar
- McMurtry IF, Bauer NR, Fagan KA, Nagaoka T, Gebb SA, Oka M: Hypoxia and Rho/Rho-kinase signaling. Lung development versus hypoxic pulmonary hypertension. Advances in experimental medicine and biology. 2003, 543: 127-137. 10.1007/978-1-4419-8997-0_9.View ArticlePubMedGoogle Scholar
- Usatyuk PV, Romer LH, He D, Parinandi NL, Kleinberg ME, Zhan S, Jacobson JR, Dudek SM, Pendyala S, Garcia JG: Regulation of hyperoxia-induced NADPH oxidase activation in human lung endothelial cells by the actin cytoskeleton and cortactin. The Journal of biological chemistry. 2007, 282 (32): 23284-23295. 10.1074/jbc.M700535200.View ArticlePubMedGoogle Scholar
- Lavoie JC, Rouleau T, Chessex P: Interaction between ascorbate and light-exposed riboflavin induces lung remodeling. The Journal of pharmacology and experimental therapeutics. 2004, 311 (2): 634-639. 10.1124/jpet.104.070755.View ArticlePubMedGoogle Scholar
- Chang MY, Yu YP, Tsai JR, Sheu CC, Chong IW, Lin SR: Combined oligonucleotide microarray-bioinformatics and constructed membrane arrays to analyze the biological pathways in the carcinogenesis of human lung adenocarcinoma. Oncology reports. 2007, 18 (3): 569-579.PubMedGoogle Scholar
- Verbrugge SJ, de Jong JW, Keijzer E, Vazquez de Anda G, Lachmann B: Purine in bronchoalveolar lavage fluid as a marker of ventilation-induced lung injury. Critical care medicine. 1999, 27 (4): 779-783. 10.1097/00003246-199904000-00035.View ArticlePubMedGoogle Scholar
- He K, Wang Q, Yang Y, Wang M, Pan Y: A Comparative Study of Mouse Hepatic and Intestinal Gene Expression Profiles under PPARalpha Knockout by Gene Set Enrichment Analysis. PPAR research. 2011, 2011: 629728-PubMed CentralView ArticlePubMedGoogle Scholar
- Li J, Szekely L, Eriksson L, Heddson B, Sundbom A, Czene K, Hall P, Humphreys K: High-throughput mammographic-density measurement: a tool for risk prediction of breast cancer. Breast cancer research: BCR. 2012, 14 (4): R114.-10.1186/bcr3238.PubMed CentralView ArticlePubMedGoogle Scholar
- Zhang XJ, Sun JG, Sun J, Ming H, Wang XX, Wu L, Chen ZT: Prediction of radiation pneumonitis in lung cancer patients: a systematic review. Journal of cancer research and clinical oncology. 2012, 138 (12): 2103-2116. 10.1007/s00432-012-1284-1.View ArticlePubMedGoogle Scholar
- Grell P, Fabian P, Khoylou M, Radova L, Slaby O, Hrstka R, Vyzula R, Hajduch M, Svoboda M: Akt expression and compartmentalization in prediction of clinical outcome in HER2-positive metastatic breast cancer patients treated with trastuzumab. International journal of oncology. 2012Google Scholar
- Stiekema J, Boot H, Aleman BM, Wessels LF, van Sandick JW: Prognostication and prediction using gene expression profiling in oesophageal cancer. European journal of surgical oncology: the journal of the European Society of Surgical Oncology and the British Association of Surgical Oncology. 2012Google Scholar
- Chen HC, Kodell RL, Cheng KF, Chen JJ: Assessment of performance of survival prediction models for cancer prognosis. BMC medical research methodology. 2012, 12: 102-10.1186/1471-2288-12-102.PubMed CentralView ArticlePubMedGoogle Scholar
- Zhang Y, Sun Y, Xiang J, Hu H, Chen H: A prediction model for N2 disease inT1 non-small cell lung cancer. The Journal of thoracic and cardiovascular surgery. 2012, 144 (6): 1360-1364. 10.1016/j.jtcvs.2012.06.050.View ArticlePubMedGoogle Scholar
- Kim W, Kim KS, Lee JE, Noh DY, Kim SW, Jung YS, Park MY, Park RW: Development of novel breast cancer recurrence prediction model using support vector machine. Journal of breast cancer. 2012, 15 (2): 230-238. 10.4048/jbc.2012.15.2.230.PubMed CentralView ArticlePubMedGoogle Scholar
- Sun T, Simon I, Moreno V, Roepman P, Tabernero J, Snel M, Van't Veer L, Salazar R, Bernards R, Capella G: A combined oncogenic pathway signature of BRAF, KRAS and PI3KCA mutation improves colorectal cancer classification and cetuximab treatment prediction. Gut. 2012Google Scholar
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