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Detecting Early Warning Signal of Influenza A Disease Using Sample-Specific Dynamical Network Biomarkers. BIOMED RESEARCH INTERNATIONAL 2018; 2018:6807059. [PMID: 29662893 PMCID: PMC5831949 DOI: 10.1155/2018/6807059] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/05/2017] [Revised: 11/30/2017] [Accepted: 12/25/2017] [Indexed: 11/17/2022]
Abstract
Aims/Introduction. Evidences have shown that the deteriorated procession of disease is not a smooth change with time and conditions, in which a critical transition point denoted as predisease state drives the state from normal to disease. Considering individual differences, this paper provides a sample-specific method that constructs an index with individual-specific dynamical network biomarkers (DNB) which are defined as early warning index (EWI) for detecting predisease state of individual sample. Based on microarray data of influenza A disease, 144 genes are selected as DNB and the 7th time period is defined as predisease state. In addition, according to functional analysis of the discovered DNB, it is relevant with experience data, which can illustrate the effectiveness of our sample-specific method.
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Wang R, Chen YS, Dashwood WM, Li Q, Löhr CV, Fischer K, Ho E, Williams DE, Dashwood RH. Divergent roles of p120-catenin isoforms linked to altered cell viability, proliferation, and invasiveness in carcinogen-induced rat skin tumors. Mol Carcinog 2017; 56:1733-1742. [PMID: 28218467 DOI: 10.1002/mc.22630] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2016] [Revised: 02/02/2017] [Accepted: 02/16/2017] [Indexed: 12/15/2022]
Abstract
The heterocyclic amine 2-amino-1-methyl-6-phenylimidazo[4,5-b]pyridine (PhIP) targets multiple organs for tumorigenesis in the rat, including the colon and the skin. PhIP-induced skin tumors were subjected to mutation screening, which identified genetic changes in Hras (7/40, 17.5%) and Tp53 (2/40, 5%), but not in Ctnnb1, a commonly mutated gene in PhIP-induced colon tumors. Despite the absence of Ctnnb1 mutations, β-catenin was overexpressed in nuclear and plasma membrane fractions from PhIP-induced skin tumors, coinciding with loss of p120-catenin from the plasma membrane, and the appearance of multiple p120-catenin-associated bands in the nuclear extracts. Real-time RT-PCR revealed that p120-catenin isoforms 1 and 4 were upregulated in PhIP-induced skin tumors, whereas p120-catenin isoform 3 was expressed uniformly, compared with adjacent normal-looking tissue. In human epidermoid carcinoma and colon cancer cells, transient transfection of p120-catenin isoform 1A enhanced the viability and cell invasion index, whereas transient transfection of p120-catenin isoform 4A increased cell viability and cell proliferation. Knockdown of p120-catenin revealed a corresponding reduction in the expression of β-catenin and a transcriptionally regulated target, Ccnd1/Cyclin D1. Co-immunoprecipitation experiments identified associations of β-catenin with p120-catenin isoforms in PhIP-induced skin tumors and human cancer cell lines. The results are discussed in the context of therapeutic strategies that might target different p120-catenin isoforms, providing an avenue to circumvent constitutively active β-catenin arising via distinct mechanisms in skin and colon cancer.
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Affiliation(s)
- Rong Wang
- Linus Pauling Institute, Oregon State University, Corvallis, Oregon
| | - Ying-Shiuan Chen
- Center for Epigenetics and Disease Prevention, Texas A&M University Health Science Center, Institute of Biosciences and Technology, Houston, Texas
| | - Wan-Mohaiza Dashwood
- Center for Epigenetics and Disease Prevention, Texas A&M University Health Science Center, Institute of Biosciences and Technology, Houston, Texas
| | - Qingjie Li
- Department of Internal Medicine, University of Texas Medical Branch, Galveston, Texas
| | - Christiane V Löhr
- College of Veterinary Medicine, Oregon State University, Corvallis, Oregon
| | - Kay Fischer
- College of Veterinary Medicine, Oregon State University, Corvallis, Oregon
| | - Emily Ho
- Linus Pauling Institute, Oregon State University, Corvallis, Oregon.,School of Biological and Population Health Sciences, Oregon State University, Corvallis, Oregon
| | - David E Williams
- Linus Pauling Institute, Oregon State University, Corvallis, Oregon.,Department of Environmental and Molecular Toxicology, Oregon State University, Corvallis, Oregon
| | - Roderick H Dashwood
- Center for Epigenetics and Disease Prevention, Texas A&M University Health Science Center, Institute of Biosciences and Technology, Houston, Texas.,Department of Nutrition and Food Science, Texas A&M University, College Station, Texas.,Department of Molecular and Cellular Medicine, Texas A&M College of Medicine, College Station, Texas.,Department of Clinical Cancer Prevention, The University of Texas MD Anderson Cancer Center, Houston, Texas
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