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Zhuang A, Gu X, Ge T, Wang S, Ge S, Chai P, Jia R, Fan X. Targeting histone deacetylase suppresses tumor growth through eliciting METTL14-modified m 6 A RNA methylation in ocular melanoma. Cancer Commun (Lond) 2023; 43:1185-1206. [PMID: 37466203 PMCID: PMC10631484 DOI: 10.1002/cac2.12471] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2022] [Revised: 03/31/2023] [Accepted: 07/13/2023] [Indexed: 07/20/2023] Open
Abstract
BACKGROUND Diversified histone deacetylation inhibitors (HDACis) have demonstrated encouraging outcomes in multiple malignancies. N6-methyladenine (m6 A) is the most prevalent messenger RNA modification that plays an essential role in the regulation of tumorigenesis. Howbeit, an in-depth understanding of the crosstalk between histone acetylation and m6 A RNA modifications remains enigmatic. This study aimed to explore the role of histone acetylation and m6 A modifications in the regulation of tumorigenesis of ocular melanoma. METHODS Histone modification inhibitor screening was used to explore the effects of HDACis on ocular melanoma cells. Dot blot assay was used to detect the global m6 A RNA modification level. Multi-omics assays, including RNA-sequencing, cleavage under targets and tagmentation, single-cell sequencing, methylated RNA immunoprecipitation-sequencing (meRIP-seq), and m6 A individual nucleotide resolution cross-linking and immunoprecipitation-sequencing (miCLIP-seq), were performed to reveal the mechanisms of HDACis on methyltransferase-like 14 (METTL14) and FAT tumor suppressor homolog 4 (FAT4) in ocular melanoma. Quantitative real-time polymerase chain reaction (qPCR), western blotting, and immunofluorescent staining were applied to detect the expression of METTL14 and FAT4 in ocular melanoma cells and tissues. Cell models and orthotopic xenograft models were established to determine the roles of METTL14 and FAT4 in the growth of ocular melanoma. RNA-binding protein immunoprecipitation-qPCR, meRIP-seq, miCLIP-seq, and RNA stability assay were adopted to investigate the mechanism by which m6 A levels of FAT4 were affected. RESULTS First, we found that ocular melanoma cells presented vulnerability towards HDACis. HDACis triggered the elevation of m6 A RNA modification in ocular melanoma. Further studies revealed that METTL14 served as a downstream candidate for HDACis. METTL14 was silenced by the hypo-histone acetylation status, whereas HDACi restored the normal histone acetylation level of METTL14, thereby inducing its expression. Subsequently, METTL14 served as a tumor suppressor by promoting the expression of FAT4, a tumor suppressor, in a m6 A-YTH N6-methyladenosine RNA-binding protein 1-dependent manner. Taken together, we found that HDACi restored the histone acetylation level of METTL14 and subsequently elicited METTL14-mediated m6 A modification in tumorigenesis. CONCLUSIONS These results demonstrate that HDACis exert anti-cancer effects by orchestrating m6 A modification, which unveiling a "histone-RNA crosstalk" of the HDAC/METTL14/FAT4 epigenetic cascade in ocular melanoma.
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Affiliation(s)
- Ai Zhuang
- Department of OphthalmologyShanghai Ninth People's HospitalShanghai JiaoTong University School of MedicineShanghaiP. R. China
- Shanghai Key Laboratory of Orbital Diseases and Ocular OncologyShanghaiP. R. China
| | - Xiang Gu
- Department of OphthalmologyShanghai Ninth People's HospitalShanghai JiaoTong University School of MedicineShanghaiP. R. China
- Shanghai Key Laboratory of Orbital Diseases and Ocular OncologyShanghaiP. R. China
| | - Tongxin Ge
- Department of OphthalmologyShanghai Ninth People's HospitalShanghai JiaoTong University School of MedicineShanghaiP. R. China
- Shanghai Key Laboratory of Orbital Diseases and Ocular OncologyShanghaiP. R. China
| | - Shaoyun Wang
- Department of OphthalmologyShanghai Ninth People's HospitalShanghai JiaoTong University School of MedicineShanghaiP. R. China
- Shanghai Key Laboratory of Orbital Diseases and Ocular OncologyShanghaiP. R. China
| | - Shengfang Ge
- Department of OphthalmologyShanghai Ninth People's HospitalShanghai JiaoTong University School of MedicineShanghaiP. R. China
- Shanghai Key Laboratory of Orbital Diseases and Ocular OncologyShanghaiP. R. China
| | - Peiwei Chai
- Department of OphthalmologyShanghai Ninth People's HospitalShanghai JiaoTong University School of MedicineShanghaiP. R. China
- Shanghai Key Laboratory of Orbital Diseases and Ocular OncologyShanghaiP. R. China
| | - Renbing Jia
- Department of OphthalmologyShanghai Ninth People's HospitalShanghai JiaoTong University School of MedicineShanghaiP. R. China
- Shanghai Key Laboratory of Orbital Diseases and Ocular OncologyShanghaiP. R. China
| | - Xianqun Fan
- Department of OphthalmologyShanghai Ninth People's HospitalShanghai JiaoTong University School of MedicineShanghaiP. R. China
- Shanghai Key Laboratory of Orbital Diseases and Ocular OncologyShanghaiP. R. China
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Chen PN, Chen XY, Chen GX, Luo L, Yan QZ, Ruan P, Li P, Yu DH. Squamous–columnar junction of Von Ebner’s glands may be a significant origin of squamous cell carcinomas in the base of the tongue. Front Oncol 2022; 12:1029404. [DOI: 10.3389/fonc.2022.1029404] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2022] [Accepted: 10/26/2022] [Indexed: 11/17/2022] Open
Abstract
ObjectivesThe histological origin of base of the tongue (BOT) carcinomas is still elusive, and most studies have been focusing on the lingual tonsil. In this study, we sought to identify the existence of the squamous–columnar junction (SCJ) in the human Von Ebner’s glandular duct and explored the potential of that in forming squamous cell carcinomas in BOT.Materials and methodsThe specific genomes of BOT carcinoma were acquired and screened out by The Cancer Genome Atlas (TCGA) database analysis. The 4-nitroquinoline-1-oxide (4-NQO)-treated mouse model was used to explore the transformation of SCJ during cancerization. We used immunohistochemistry to confirm the characteristics of SCJ in human Von Ebner’s gland, which were further compared with those in the anus and cervix.ResultsThe SCJ in the human Von Ebner’s glandular duct was found to be similar to that of the cervix and anus. The transformation zone in the 4-NQO-treated mouse model had a multilayered epithelium structure similar to that of HPV16-transgenic mice. In human, the transformation zone of Von Ebner’s gland is also similar to that of the cervix and anus.ConclusionIt is the first time that the existence of SCJ in the opening of the human Von Ebner’s glandular duct was confirmed. The SCJ of Von Ebner’s glands may be a significant origin of squamous cell carcinomas in BOT.
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Cooper TK, Meyerholz DK, Beck AP, Delaney MA, Piersigilli A, Southard TL, Brayton CF. Research-Relevant Conditions and Pathology of Laboratory Mice, Rats, Gerbils, Guinea Pigs, Hamsters, Naked Mole Rats, and Rabbits. ILAR J 2022; 62:77-132. [PMID: 34979559 DOI: 10.1093/ilar/ilab022] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2021] [Accepted: 05/12/2021] [Indexed: 12/31/2022] Open
Abstract
Animals are valuable resources in biomedical research in investigations of biological processes, disease pathogenesis, therapeutic interventions, safety, toxicity, and carcinogenicity. Interpretation of data from animals requires knowledge not only of the processes or diseases (pathophysiology) under study but also recognition of spontaneous conditions and background lesions (pathology) that can influence or confound the study results. Species, strain/stock, sex, age, anatomy, physiology, spontaneous diseases (noninfectious and infectious), and neoplasia impact experimental results and interpretation as well as animal welfare. This review and the references selected aim to provide a pathology resource for researchers, pathologists, and veterinary personnel who strive to achieve research rigor and validity and must understand the spectrum of "normal" and expected conditions to accurately identify research-relevant experimental phenotypes as well as unusual illness, pathology, or other conditions that can compromise studies involving laboratory mice, rats, gerbils, guinea pigs, hamsters, naked mole rats, and rabbits.
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Affiliation(s)
- Timothy K Cooper
- Department of Comparative Medicine, Penn State Hershey Medical Center, Hershey, PA, USA
| | - David K Meyerholz
- Department of Pathology, University of Iowa Roy J. and Lucille A. Carver College of Medicine, Iowa City, Iowa, USA
| | - Amanda P Beck
- Department of Pathology, Yeshiva University Albert Einstein College of Medicine, Bronx, New York, USA
| | - Martha A Delaney
- Zoological Pathology Program, University of Illinois at Urbana-Champaign College of Veterinary Medicine, Urbana-Champaign, Illinois, USA
| | - Alessandra Piersigilli
- Laboratory of Comparative Pathology and the Genetically Modified Animal Phenotyping Service, Memorial Sloan Kettering Cancer Center, New York, New York, USA
| | - Teresa L Southard
- Department of Biomedical Sciences, Cornell University College of Veterinary Medicine, Ithaca, New York, USA
| | - Cory F Brayton
- Department of Molecular and Comparative Pathobiology, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
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The novel FAT4 activator jujuboside A suppresses NSCLC tumorigenesis by activating HIPPO signaling and inhibiting YAP nuclear translocation. Pharmacol Res 2021; 170:105723. [PMID: 34116210 DOI: 10.1016/j.phrs.2021.105723] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/10/2021] [Revised: 05/29/2021] [Accepted: 06/04/2021] [Indexed: 12/11/2022]
Abstract
FAT atypical cadherin 4 (FAT4) has been identified as a tumor suppressor in lung cancers. However, no agent for lung cancer treatment targeting FAT4 has been used in the clinic. Jujuboside A (JUA) is a major active compound in Semen Ziziphi Spinosae. Semen Ziziphi Spinosae is a traditional Chinese herbal medicine used clinically for tumor treatment to improve patients' quality of life. However, the anti-lung cancer activity and the underlying mechanisms of JUA are not yet fully understood. Here, we demonstrated the anti-lung cancer activity of JUA in two lung cancer mice models and three non-small cell lung cancer (NSCLC) cell lines, and further illustrated its underlying mechanisms. JUA suppressed the occurrence and development of lung cancer and extended mice survival in vivo, and suppressed NSCLC cell activities through cell cycle arrest, proliferation suppression, stemness inhibition and senescence promotion. Moreover, JUA directly bound with and activated FAT4, subsequently activating FAT4-HIPPO signaling and inhibiting YAP nuclear translocation. Knockdown of FAT4 diminished JUA's effects on HIPPO signaling, YAP nuclear translocation, cell proliferation and cellular senescence. In conclusion, JUA significantly suppressed NSCLC tumorigenesis by regulating FAT4-HIPPO-YAP signaling. Our findings suggest that JUA is a novel FAT4 activator that can be developed as a promising NSCLC therapeutic agent targeting the FAT4-HIPPO-YAP pathway.
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Boeckx B, Shahi RB, Smeets D, De Brakeleer S, Decoster L, Van Brussel T, Galdermans D, Vercauter P, Decoster L, Alexander P, Berchem G, Ocak S, Vuylsteke P, Deschepper K, Lambrechts M, Cappoen N, Teugels E, Lambrechts D, De Greve J. The genomic landscape of nonsmall cell lung carcinoma in never smokers. Int J Cancer 2020; 146:3207-3218. [DOI: 10.1002/ijc.32797] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2019] [Revised: 10/11/2019] [Accepted: 10/15/2019] [Indexed: 01/30/2023]
Affiliation(s)
- Bram Boeckx
- Laboratory of Translational GeneticsVIB Center for Cancer Biology, VIB Leuven Belgium
- Laboratory of Translational Genetics, Department of Human GeneticsUniversity of Leuven (KULeuven) Leuven Belgium
| | - Rajendra B. Shahi
- Laboratory of Medical and Molecular Oncology (LMMO), Department of Medical Oncology, Oncologisch Centrum, UZ BrusselVrije Universiteit Brussel (VUB) Brussels Belgium
| | - Dominiek Smeets
- Laboratory of Translational GeneticsVIB Center for Cancer Biology, VIB Leuven Belgium
- Laboratory of Translational Genetics, Department of Human GeneticsUniversity of Leuven (KULeuven) Leuven Belgium
| | - Sylvia De Brakeleer
- Laboratory of Medical and Molecular Oncology (LMMO), Department of Medical Oncology, Oncologisch Centrum, UZ BrusselVrije Universiteit Brussel (VUB) Brussels Belgium
| | - Lore Decoster
- Laboratory of Medical and Molecular Oncology (LMMO), Department of Medical Oncology, Oncologisch Centrum, UZ BrusselVrije Universiteit Brussel (VUB) Brussels Belgium
| | - Thomas Van Brussel
- Laboratory of Translational GeneticsVIB Center for Cancer Biology, VIB Leuven Belgium
- Laboratory of Translational Genetics, Department of Human GeneticsUniversity of Leuven (KULeuven) Leuven Belgium
| | | | | | - Lynn Decoster
- Department of PulmonologyAZ Turnhout Turnhout Belgium
| | | | - Guy Berchem
- Centre Hospitalier de Luxembourg Luxembourg City Luxemburg
| | - Sebahat Ocak
- CHU UCL Namur (Godinne Site) Yvoir Belgium
- Institut de Recherche Expérimentale et Clinique (IREC), Pneumology Pole, Université Catholique de Louvain (UCL) Ottignies‐Louvain‐la‐Neuve Belgium
| | - Peter Vuylsteke
- Université Catholique de Louvain, CHU UCL Namur, Site Sainte Elisabeth Namur Belgium
| | | | | | - Nadia Cappoen
- Laboratory of Medical and Molecular Oncology (LMMO), Department of Medical Oncology, Oncologisch Centrum, UZ BrusselVrije Universiteit Brussel (VUB) Brussels Belgium
| | - Erik Teugels
- Laboratory of Medical and Molecular Oncology (LMMO), Department of Medical Oncology, Oncologisch Centrum, UZ BrusselVrije Universiteit Brussel (VUB) Brussels Belgium
| | - Diether Lambrechts
- Laboratory of Translational GeneticsVIB Center for Cancer Biology, VIB Leuven Belgium
- Laboratory of Translational Genetics, Department of Human GeneticsUniversity of Leuven (KULeuven) Leuven Belgium
| | - Jacques De Greve
- Laboratory of Medical and Molecular Oncology (LMMO), Department of Medical Oncology, Oncologisch Centrum, UZ BrusselVrije Universiteit Brussel (VUB) Brussels Belgium
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Zhou Y, You M. Integrative system genetic analysis reveals mRNA-lncRNA network associated with mouse spontaneous lung cancer susceptibility. Oncotarget 2019; 10:339-351. [PMID: 30719228 PMCID: PMC6349452 DOI: 10.18632/oncotarget.26554] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2018] [Accepted: 12/10/2018] [Indexed: 11/25/2022] Open
Abstract
Introduction Lung cancer continues to be a significant health burden in the United States. Lung cancer in never smokers is considered as a different disease and underlying mechanism of spontaneous lung cancer susceptibility is still poorly known. Meanwhile, the roles of long non-coding RNAs (lncRNAs), which have multiple functions in biological processes, have seldom been studied in spontaneous lung cancer susceptibility. Methods In this study, microarray analyses of normal lung tissues were performed in 23 different mouse strains. LncRNA profile was analyzed by re-annotating exon array for lncRNAs detection. LncRNA/mRNA co-expression networks were constructed and the association between significant lncRNA module and significant mRNA modules was calculated. Finally, Genome-wide association (GWA) results were used to further highlight the key mRNAs and lncRNAs associated with spontaneous lung cancer susceptibility. Results Four mRNA modules were significantly associated with spontaneous lung cancer susceptibility. Genes in these modules were enriched in “blood coagulation” and “immune system process”. Only one lncRNA module was significantly associated with spontaneous lung cancer susceptibility. Many lncRNAs in this module were co-expressed with mRNAs in the second most significant mRNA module. This co-expression network contained 113 interactions between 30 lncRNAs and 40 mRNAs. After GWA filtration, two mRNAs (Myo7a and Zfp874a) and two lncRNAs (n290048 and n271850) were highlighted as the candidates responsible for genetic susceptibility to lung cancer. Conclusions We firstly used integrative system genetic analysis to report the mRNA-lncRNA network associated with spontaneous lung cancer susceptibility and identified potential targets for lung cancer prevention.
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Affiliation(s)
- Yu Zhou
- Cancer Center, Medical College of Wisconsin, Milwaukee, WI, 53226, USA
| | - Ming You
- Cancer Center, Medical College of Wisconsin, Milwaukee, WI, 53226, USA
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Constructing Bayesian networks by integrating gene expression and copy number data identifies NLGN4Y as a novel regulator of prostate cancer progression. Oncotarget 2018; 7:68688-68707. [PMID: 27626693 PMCID: PMC5356583 DOI: 10.18632/oncotarget.11925] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2016] [Accepted: 08/24/2016] [Indexed: 12/27/2022] Open
Abstract
To understand the heterogeneity of prostate cancer (PCa) and identify novel underlying drivers, we constructed integrative molecular Bayesian networks (IMBNs) for PCa by integrating gene expression and copy number alteration data from published datasets. After demonstrating such IMBNs with superior network accuracy, we identified multiple sub-networks within IMBNs related to biochemical recurrence (BCR) of PCa and inferred the corresponding key drivers. The key drivers regulated a set of common effectors including genes preferentially expressed in neuronal cells. NLGN4Y—a protein involved in synaptic adhesion in neurons—was ranked as the top gene closely linked to key drivers of myogenesis subnetworks. Lower expression of NLGN4Y was associated with higher grade PCa and an increased risk of BCR. We show that restoration of the protein expression of NLGN4Y in PC-3 cells leads to decreased cell proliferation, migration and inflammatory cytokine expression. Our results suggest that NLGN4Y is an important negative regulator in prostate cancer progression. More importantly, it highlights the value of IMBNs in generating biologically and clinically relevant hypotheses about prostate cancer that can be validated by independent studies.
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Novikova SE, Kurbatov LK, Zavialova MG, Zgoda VG, Archakov AI. [Omics technologies in diagnostics of lung adenocarcinoma]. BIOMEDIT︠S︡INSKAI︠A︡ KHIMII︠A︡ 2017; 63:181-210. [PMID: 28781253 DOI: 10.18097/pbmc20176303181] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
To date lung adenocarcinoma (LAC) is the most common type of lung cancer. Numerous studies on LAC biology resulted in identification of crucial mutations in protooncogenes and activating neoplastic transformation pathways. Therapeutic approaches that significantly increase the survival rate of patients with LAC of different etiology have been developed and introduced into clinical practice. However, the main problem in the treatment of LAC is early diagnosis, taking into account both factors and mechanisms responsible in tumor initiation and progression. Identification of a wide biomarker repertoire with high specificity and reliability of detection appears to be a solution to this problem. In this context, proteins with differential expression in normal and pathological condition, suitable for detection in biological fluids are the most promising biomarkers. In this review we have analyzed literature data on studies aimed at search of LAC biomarkers. The major attention has been paid to protein biomarkers as the most promising and convenient subject of clinical diagnosis. The review also summarizes existing knowledge on posttranslational modifications, splice variants, isoforms, as well as model systems and transcriptome changes in LAC.
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Affiliation(s)
- S E Novikova
- Institute of Biomedical Chemistry, Moscow, Russia
| | - L K Kurbatov
- Institute of Biomedical Chemistry, Moscow, Russia
| | | | - V G Zgoda
- Institute of Biomedical Chemistry, Moscow, Russia
| | - A I Archakov
- Institute of Biomedical Chemistry, Moscow, Russia
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Han Y, Jin X, Li H, Wang K, Gao J, Song L, Lv Y. Microarray analysis of copy-number variations and gene expression profiles in prostate cancer. Medicine (Baltimore) 2017; 96:e7264. [PMID: 28700469 PMCID: PMC5515741 DOI: 10.1097/md.0000000000007264] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Abstract
BACKGROUND This study aimed to identify potential prostate cancer (PC)-related variations in gene expression profiles. METHODS Microarray data from the GSE21032 dataset that contained the whole-transcript and exon-level expression profile (GSE21034) and Agilent 244K array-comparative genomic hybridization data (GSE21035) were downloaded from the Gene Expression Omnibus database. Differentially expressed genes (DEGs) and copy-number variations (CNVs) were identified between PC and normal tissue samples. Coexpression interactions of DEGs that contained CNVs (CNV-DEGs) were analyzed. Pathway enrichment analysis of CNV-DEGs was performed. Drugs targeting CNV-DEGs were searched using the Drug-Gene Interaction database. RESULTS In total, 679 DEGs were obtained, including 182 upregulated genes and 497 downregulated genes. A total of 48 amplified CNV regions and 45 deleted regions were determined. The number of CNVs at 8q and 8p was relatively higher in PC tissue. Only 16 DEGs, including 4 upregulated and 12 downregulated genes, showed a positive correlation with CNVs. In the coexpression network, 3 downregulated CNV-DEGs, including FAT4 (FAT atypical cadherin 4), PDE5A (phosphodiesterase 5A, cGMP-specific), and PCP4 (Purkinje cell protein 4), had a higher degree, and were enriched in specific pathways such as the calmodulin signaling pathway. Five of the 16 CNV-DEGs (e.g., PDE5A) were identified as drug targets. CONCLUSION The identified CNV-DEGs could be implicated in the progression of human PC. The findings could lead to a better understanding of PC pathogenesis.
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Affiliation(s)
- Yuping Han
- Department of Urology, China-Japan Union Hospital of Jilin University, Changchun, Jilin
| | - Xuefei Jin
- Department of Urology, China-Japan Union Hospital of Jilin University, Changchun, Jilin
| | - Hongyan Li
- Department of Urology, China-Japan Union Hospital of Jilin University, Changchun, Jilin
| | - Kaichen Wang
- Department of Urology, China-Japan Union Hospital of Jilin University, Changchun, Jilin
| | - Ji Gao
- Department of Urology, China-Japan Union Hospital of Jilin University, Changchun, Jilin
| | - Lide Song
- Department of Urology, Zhuji People's Hospital, Zhuji, Zhejiang, China
| | - Yanting Lv
- Department of Urology, Zhuji People's Hospital, Zhuji, Zhejiang, China
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Kelly NJ, Radder JE, Baust JJ, Burton CL, Lai YC, Potoka KC, Agostini BA, Wood JP, Bachman TN, Vanderpool RR, Dandachi N, Leme AS, Gregory AD, Morris A, Mora AL, Gladwin MT, Shapiro SD. Mouse Genome-Wide Association Study of Preclinical Group II Pulmonary Hypertension Identifies Epidermal Growth Factor Receptor. Am J Respir Cell Mol Biol 2017; 56:488-496. [PMID: 28085498 DOI: 10.1165/rcmb.2016-0176oc] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
Pulmonary hypertension (PH) is associated with features of obesity and metabolic syndrome that translate to the induction of PH by chronic high-fat diet (HFD) in some inbred mouse strains. We conducted a genome-wide association study (GWAS) to identify candidate genes associated with susceptibility to HFD-induced PH. Mice from 36 inbred and wild-derived strains were fed with regular diet or HFD for 20 weeks beginning at 6-12 weeks of age, after which right ventricular (RV) and left ventricular (LV) end-systolic pressure (ESP) and maximum pressure (MaxP) were measured by cardiac catheterization. We tested for association of RV MaxP and RV ESP and identified genomic regions enriched with nominal associations to both of these phenotypes. We excluded genomic regions if they were also associated with LV MaxP, LV ESP, or body weight. Genes within significant regions were scored based on the shortest-path betweenness centrality, a measure of network connectivity, of their human orthologs in a gene interaction network of human PH-related genes. WSB/EiJ, NON/ShiLtJ, and AKR/J mice had the largest increases in RV MaxP after high-fat feeding. Network-based scoring of GWAS candidates identified epidermal growth factor receptor (Egfr) as having the highest shortest-path betweenness centrality of GWAS candidates. Expression studies of lung homogenate showed that EGFR expression is increased in the AKR/J strain, which developed a significant increase in RV MaxP after high-fat feeding as compared with C57BL/6J, which did not. Our combined GWAS and network-based approach adds evidence for a role for Egfr in murine PH.
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Affiliation(s)
| | | | | | | | - Yen-Chun Lai
- 1 Department of Medicine.,2 Vascular Medicine Institute, and
| | - Karin C Potoka
- 1 Department of Medicine.,3 Department of Pediatrics, University of Pittsburgh and University of Pittsburgh Medical Center, Pittsburgh, Pennsylvania
| | | | | | | | | | | | | | | | | | - Ana L Mora
- 1 Department of Medicine.,2 Vascular Medicine Institute, and
| | - Mark T Gladwin
- 1 Department of Medicine.,2 Vascular Medicine Institute, and
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Stakišaitis D, Mozūraitė R, Kavaliauskaitė D, Šlekienė L, Balnytė I, Juodžiukynienė N, Valančiūtė A. Sex-related differences of urethane and sodium valproate effects on Ki-67 expression in urethane-induced lung tumors of mice. Exp Ther Med 2017; 13:2741-2750. [PMID: 28587335 PMCID: PMC5450691 DOI: 10.3892/etm.2017.4324] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2016] [Accepted: 02/01/2017] [Indexed: 12/12/2022] Open
Abstract
The aim of the present study was to evaluate sex differences in tumorigenesis by assessing the number of Ki-67-positive cells [Ki-67(+)] in urethane-induced mice lung tumors and the effect of sodium valproate (NaVP) in BALB/c mice. Gonad-intact and gonadectomized female and male mice were divided into the following groups: i) Treated with urethane, ii) treated with urethane and NaVP and iii) gonad-intact or gonadectomized control. Urethane (total 50 mg/mouse) was injected intraperitoneally. The NaVP 0.4% solution was administered orally for 6 months. Histologically, lung tumors were divided into adenomas and adenocarcinomas and assessed immunohistochemically using antibodies against Ki-67. The Ki-67(+) was calculated per one mm2 of a tumor. In adenomas, Ki-67(+) in the urethane-treated gonad-intact males was significantly higher than in females (P=0.001) and in castrated males (P<0.01); Ki-67(+) in adenomas of the urethane-treated gonad-intact males was significantly higher than in urethane-NaVP-treated ones (P<0.04). No significant differences were found in analogous female groups. In adenocarcinomas, Ki-67(+) in urethane-treated gonad-intact males was significantly higher than in females and gonadectomized mice of both sexes (P<0.001), and in ovariectomized females was significantly higher than in ovary-intact group (P=0.01). A significantly higher number of Ki-67(+) cells were observed in gonad-intact adenocarcinomas of the urethane-NaVP-treated females compared with the urethane-treated ones (P<0.001). Comparing between urethane-NaVP-treated gonadectomized males and females in adenocarcinomas, determined that Ki-67(+) was significantly lower in females (P=0.005). In adenocarcinomas, Ki-67(+) in urethane-NaVP-treated gonadectomized males and females was significantly lower than in gonad-intact mice of the same sex (P<0.001). In summary, gonadectomy with NaVP treatment decreased Ki-67(+) in adenocarcinomas for mice of both sexes. The results of the present study indicate sex-related differences in mice lung tumorigenesis, and a sex-related effect of NaVP on progression in urethane-induced BALB/c mice lung tumors.
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Affiliation(s)
- Donatas Stakišaitis
- Laboratory of Cancer Epidemiology, National Cancer Institute, LT-08660 Vilnius, Lithuania.,Department of Histology and Embryology, Lithuanian University of Health Sciences, LT-44307 Kaunas, Lithuania
| | - Raminta Mozūraitė
- Department of Histology and Embryology, Lithuanian University of Health Sciences, LT-44307 Kaunas, Lithuania
| | - Dovilė Kavaliauskaitė
- Department of Histology and Embryology, Lithuanian University of Health Sciences, LT-44307 Kaunas, Lithuania
| | - Lina Šlekienė
- Department of Histology and Embryology, Lithuanian University of Health Sciences, LT-44307 Kaunas, Lithuania
| | - Ingrida Balnytė
- Department of Histology and Embryology, Lithuanian University of Health Sciences, LT-44307 Kaunas, Lithuania
| | - Nomeda Juodžiukynienė
- Veterinary Academy, Lithuanian University of Health Sciences, LT-47181 Kaunas, Lithuania
| | - Angelija Valančiūtė
- Department of Histology and Embryology, Lithuanian University of Health Sciences, LT-44307 Kaunas, Lithuania
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Zhang X, Liu J, Liang X, Chen J, Hong J, Li L, He Q, Cai X. History and progression of Fat cadherins in health and disease. Onco Targets Ther 2016; 9:7337-7343. [PMID: 27942226 PMCID: PMC5138043 DOI: 10.2147/ott.s111176] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
Intercellular adhesions are vital hubs for signaling pathways during multicellular development and animal morphogenesis. In eukaryotes, under aberrant intracellular conditions, cadherins are abnormally regulated, which can result in cellular pathologies such as carcinoma, kidney disease, and autoimmune diseases. As a member of the Ca2+-dependent adhesion super-family, Fat proteins were first described in the 1920s as an inheritable lethal mutant phenotype in Drosophila, consisting of four member proteins, FAT1, FAT2, FAT3, and FAT4, all of which are highly conserved in structure. Functionally, FAT1 was found to regulate cell migration and growth control through specific protein–protein interactions of its cytoplasmic tail. FAT2 and FAT3 are relatively less studied and are thought to participate in the development of human cancer through a pathway similar to that of the Ena/VASP proteins. In contrast, FAT4 has been widely studied in the context of biological functions and tumor mechanisms and has been shown to regulate the planar cell polarity pathway, the Hippo signaling pathway, the canonical Wnt signaling cascade, and the expression of YAP1. Overall, Fat cadherins may be useful as emerging disease biomarkers and as novel therapeutic targets.
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Affiliation(s)
- Xiaofeng Zhang
- Department of General Surgery; Key Laboratory of Surgery of Zhejiang Province, Sir Run Run Shaw Hospital, Zhejiang University, Hangzhou, Zhejiang
| | - Jinghua Liu
- Department of Hepatobiliary Surgery, Linyi People's Hospital, Linyi, Shandong, People's Republic of China
| | - Xiao Liang
- Department of General Surgery; Key Laboratory of Surgery of Zhejiang Province, Sir Run Run Shaw Hospital, Zhejiang University, Hangzhou, Zhejiang
| | - Jiang Chen
- Department of General Surgery; Key Laboratory of Surgery of Zhejiang Province, Sir Run Run Shaw Hospital, Zhejiang University, Hangzhou, Zhejiang
| | - Junjie Hong
- Department of General Surgery; Key Laboratory of Surgery of Zhejiang Province, Sir Run Run Shaw Hospital, Zhejiang University, Hangzhou, Zhejiang
| | - Libo Li
- Department of General Surgery
| | - Qiang He
- Department of Hepatobiliary Surgery, Linyi People's Hospital, Linyi, Shandong, People's Republic of China
| | - Xiujun Cai
- Department of General Surgery; Key Laboratory of Surgery of Zhejiang Province, Sir Run Run Shaw Hospital, Zhejiang University, Hangzhou, Zhejiang
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Inferring the progression of multifocal liver cancer from spatial and temporal genomic heterogeneity. Oncotarget 2016; 7:2867-77. [PMID: 26672766 PMCID: PMC4823077 DOI: 10.18632/oncotarget.6558] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2015] [Accepted: 11/21/2015] [Indexed: 02/07/2023] Open
Abstract
Multifocal tumors developed either as independent tumors or as intrahepatic metastases, are very common in primary liver cancer. However, their molecular pathogenesis remains elusive. Herein, a patient with synchronous two hepatocellular carcinoma (HCC, designated as HCC-A and HCC-B) and one intrahepatic cholangiocarcinoma (ICC), as well as two postoperative recurrent tumors, was enrolled. Multiregional whole-exome sequencing was applied to these tumors to delineate the clonality and heterogeneity. The three primary tumors showed almost no overlaps in mutations and copy number variations. Within each tumor, multiregional sequencing data showed varied intratumoral heterogeneity (21.6% in HCC-A, 20.4% in HCC-B, 53.2% in ICC). The mutational profile of two recurrent tumors showed obvious similarity with HCC-A (86.7% and 86.6% respectively), rather than others, indicating that they originated from HCC-A. The evolutionary history of the two recurrent tumors indicated that intrahepatic micro-metastasis could be an early event during HCC progression. Notably, FAT4 was the only gene mutated in two primary HCCs and the recurrences. Mutation prevalence screen and functional experiments showed that FAT4, harboring somatic coding mutations in 26.7% of HCC, could potently inhibit growth and invasion of HCC cells. In HCC patients, both FAT4 expression and FAT4 mutational status significantly correlated with patient prognosis. Together, our findings suggest that spatial and temporal dissection of genomic alterations during the progression of multifocal liver cancer may help to elucidate the basis for its dismal prognosis. FAT4 acts as a putative tumor suppressor that is frequently inactivated in human HCC.
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Kim SK, Avila JJ, Massett MP. Strain survey and genetic analysis of vasoreactivity in mouse aorta. Physiol Genomics 2016; 48:861-873. [PMID: 27764765 DOI: 10.1152/physiolgenomics.00054.2016] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2016] [Accepted: 09/25/2016] [Indexed: 11/22/2022] Open
Abstract
Understanding the genetic influence on vascular reactivity is important for identifying genes underlying impaired vascular function. The purpose of this study was to characterize the genetic contribution to intrinsic vascular function and to identify loci associated with phenotypic variation in vascular reactivity in mice. Concentration response curves to phenylephrine (PE), potassium chloride (KCl), acetylcholine (ACh), and sodium nitroprusside (SNP) were generated in aortic rings from male mice (12 wk old) from 27 inbred mouse strains. Significant strain-dependent differences were found for both maximal responses and sensitivity for each agent, except for SNP Max (%). Strain differences for maximal responses to ACh, PE, and KCl varied by two- to fivefold. On the basis of these large strain differences, we performed genome-wide association mapping (GWAS) to identify loci associated with variation in responses to these agents. GWAS for responses to ACh identified four significant and 19 suggestive loci. Several suggestive loci for responses to SNP, PE, and KCl (including one significant locus for KCl EC50) were also identified. These results demonstrate that intrinsic endothelial function, and more generally vascular function, is genetically determined and associated with multiple genomic loci. Furthermore, these results are supported by the finding that several genes residing in significant and suggestive loci for responses to ACh were previously identified in rat and/or human quantitative trait loci/GWAS for cardiovascular disease. This study represents the first step toward the unbiased comprehensive discovery of genetic determinants that regulate intrinsic vascular function, particularly endothelial function.
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Affiliation(s)
- Seung Kyum Kim
- Department of Health and Kinesiology, Texas A&M University, College Station, Texas
| | - Joshua J Avila
- Department of Health and Kinesiology, Texas A&M University, College Station, Texas
| | - Michael P Massett
- Department of Health and Kinesiology, Texas A&M University, College Station, Texas
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15
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Mouse genome-wide association study identifies polymorphisms on chromosomes 4, 11, and 15 for age-related cardiac fibrosis. Mamm Genome 2016; 27:179-90. [PMID: 27126641 DOI: 10.1007/s00335-016-9634-y] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2015] [Accepted: 03/24/2016] [Indexed: 10/21/2022]
Abstract
Dystrophic cardiac calcinosis (DCC), also called epicardial and myocardial fibrosis and mineralization, has been detected in mice of a number of laboratory inbred strains, most commonly C3H/HeJ and DBA/2J. In previous mouse breeding studies between these DCC susceptible and the DCC-resistant strain C57BL/6J, 4 genetic loci harboring genes involved in DCC inheritance were identified and subsequently termed Dyscalc loci 1 through 4. Here, we report susceptibility to cardiac fibrosis, a sub-phenotype of DCC, at 12 and 20 months of age and close to natural death in a survey of 28 inbred mouse strains. Eight strains showed cardiac fibrosis with highest frequency and severity in the moribund mice. Using genotype and phenotype information of the 28 investigated strains, we performed genome-wide association studies (GWAS) and identified the most significant associations on chromosome (Chr) 15 at 72 million base pairs (Mb) (P < 10(-13)) and Chr 4 at 122 Mb (P < 10(-11)) and 134 Mb (P < 10(-7)). At the Chr 15 locus, Col22a1 and Kcnk9 were identified. Both have been reported to be morphologically and functionally important in the heart muscle. The strongest Chr 4 associations were located approximately 6 Mb away from the Dyscalc 2 quantitative trait locus peak within the boundaries of the Extl1 gene and in close proximity to the Trim63 and Cap1 genes. In addition, a single-nucleotide polymorphism association was found on chromosome 11. This study provides evidence for more than the previously reported 4 genetic loci determining cardiac fibrosis and DCC. The study also highlights the power of GWAS in the mouse for dissecting complex genetic traits.
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16
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Treuting PM, Snyder JM, Ikeno Y, Schofield PN, Ward JM, Sundberg JP. The Vital Role of Pathology in Improving Reproducibility and Translational Relevance of Aging Studies in Rodents. Vet Pathol 2016; 53:244-9. [PMID: 26792843 PMCID: PMC4835687 DOI: 10.1177/0300985815620629] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
Pathology is a discipline of medicine that adds great benefit to aging studies of rodents by integrating in vivo, biochemical, and molecular data. It is not possible to diagnose systemic illness, comorbidities, and proximate causes of death in aging studies without the morphologic context provided by histopathology. To date, many rodent aging studies do not utilize end points supported by systematic necropsy and histopathology, which leaves studies incomplete, contradictory, and difficult to interpret. As in traditional toxicity studies, if the effect of a drug, dietary treatment, or altered gene expression on aging is to be studied, systematic pathology analysis must be included to determine the causes of age-related illness, moribundity, and death. In this Commentary, the authors discuss the factors that should be considered in the design of aging studies in mice, with the inclusion of robust pathology practices modified after those developed by toxicologic and discovery research pathologists. Investigators in the field of aging must consider the use of histopathology in their rodent aging studies in this era of integrative and preclinical geriatric science (geroscience).
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Affiliation(s)
- P M Treuting
- Department of Comparative Medicine, School of Medicine, University of Washington, Seattle, WA, USA
| | - J M Snyder
- Department of Comparative Medicine, School of Medicine, University of Washington, Seattle, WA, USA
| | - Y Ikeno
- Barshop Institute and Department of Pathology, University of Texas Health Science Center at San Antonio; Research Service and Geriatric Research and Education Clinical Center, Audie L. Murphy VA Hospital, South Texas Veterans Health Care System, San Antonio, TX, USA
| | - P N Schofield
- Department of Physiology, Development and Neuroscience, University of Cambridge, Cambridge, UK The Jackson Laboratory, Bar Harbor, ME, USA
| | - J M Ward
- Global VetPathology, Montgomery Village, MD, USA
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Sundberg JP, Berndt A, Sundberg BA, Silva KA, Kennedy V, Smith RS, Cooper TK, Schofield PN. Approaches to Investigating Complex Genetic Traits in a Large-Scale Inbred Mouse Aging Study. Vet Pathol 2016; 53:456-67. [PMID: 26936752 PMCID: PMC5297262 DOI: 10.1177/0300985815612556] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Inbred mice are a unique model system for studying aging because of the genetic homogeneity within inbred strains, the short life span of mice relative to humans, and the rich array of analytic tools that are available. A large-scale aging study was conducted on 28 inbred strains representing great genetic diversity to determine, via histopathology, the type and diversity of spontaneous diseases that aging mice develop. A total of 20 885 different diagnoses were made, with an average of 12 diagnoses per mouse in the study. Eighteen inbred strains have had their genomes sequenced, and many others have been partially sequenced to provide large repositories of data on genetic variation among the strains. This vast amount of genomic information can be utilized in genome-wide association studies to find candidate genes that are involved in the pathogenesis of spontaneous diseases. As an illustration, this article presents a genome-wide association study of the genetic associations of age-related intestinal amyloidosis, which implicated 3 candidate genes: translocating chain-associated membrane protein 1 (Tram1); splicing factor 3b, subunit 5 (Sf3b5); and syntaxin 11 (Stx11). Representative photomicrographs are available on the Mouse Tumor Biology Database and Pathbase to serve as a reference when evaluating inbred mice used in other genetic or experimental studies to rule out strain background lesions. Many of the age-related mouse diseases are similar, if not identical, to human diseases; therefore, the genetic discoveries have direct translational benefit.
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Affiliation(s)
| | - A Berndt
- University of Pittsburgh Medical Center, Pittsburgh, PA, USA
| | | | - K A Silva
- The Jackson Laboratory, Bar Harbor, ME, USA
| | - V Kennedy
- The Jackson Laboratory, Bar Harbor, ME, USA
| | - R S Smith
- The Jackson Laboratory, Bar Harbor, ME, USA
| | - T K Cooper
- Department of Comparative Medicine, Department of Pathology, Penn State Milton S. Hershey Medical Center, College of Medicine, Hershey, PA, USA
| | - P N Schofield
- The Jackson Laboratory, Bar Harbor, ME, USA Department of Physiology, Development, and Neuroscience, University of Cambridge, Cambridge, UK
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18
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Sittig LJ, Carbonetto P, Engel KA, Krauss KS, Palmer AA. Integration of genome-wide association and extant brain expression QTL identifies candidate genes influencing prepulse inhibition in inbred F1 mice. GENES BRAIN AND BEHAVIOR 2016; 15:260-70. [PMID: 26482417 DOI: 10.1111/gbb.12262] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/21/2015] [Revised: 10/13/2015] [Accepted: 10/15/2015] [Indexed: 12/12/2022]
Abstract
Genetic association mapping in structured populations of model organisms can offer a fruitful complement to human genetic studies by generating new biological hypotheses about complex traits. Here we investigated prepulse inhibition (PPI), a measure of sensorimotor gating that is disrupted in a number of psychiatric disorders. To identify genes that influence PPI, we constructed a panel of half-sibs by crossing 30 females from common inbred mouse strains with inbred C57BL/6J males to create male and female F1 offspring. We used publicly available single nucleotide polymorphism (SNP) genotype data from these inbred strains to perform a genome-wide association scan using a dense panel of over 150,000 SNPs in a combined sample of 604 mice representing 30 distinct F1 genotypes. We identified two independent PPI-associated loci on Chromosomes 2 and 7, each of which explained 12-14% of the variance in PPI. Searches of available databases did not identify any plausible causative coding polymorphisms within these loci. However, previously collected expression quantitative trait locus (eQTL) data from hippocampus and striatum indicated that the SNPs on Chromosomes 2 and 7 that showed the strongest association with PPI were also strongly associated with expression of several transcripts, some of which have been implicated in human psychiatric disorders. This integrative approach successfully identified a focused set of genes which can be prioritized for follow-up studies. More broadly, our results show that F1 crosses among common inbred strains can be used in combination with other informatics and expression datasets to identify candidate genes for complex behavioral traits.
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Affiliation(s)
- L J Sittig
- Department of Human Genetics, University of Chicago, Chicago, IL
| | - P Carbonetto
- Department of Human Genetics, University of Chicago, Chicago, IL
| | - K A Engel
- Department of Human Genetics, University of Chicago, Chicago, IL
| | - K S Krauss
- Department of Human Genetics, University of Chicago, Chicago, IL
| | - A A Palmer
- Department of Human Genetics, University of Chicago, Chicago, IL.,Department of Psychiatry, University of California San Diego, San Diego, CA, USA
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Stakisaitis D, Mozuraite R, Juodziukyniene N, Didziapetriene J, Uleckiene S, Matusevicius P, Valanciute A. Sodium Valproate Enhances the Urethane-Induced Lung Adenomas and Suppresses Malignization of Adenomas in Ovariectomized Female Mice. Int J Endocrinol 2015; 2015:218219. [PMID: 26491438 PMCID: PMC4600510 DOI: 10.1155/2015/218219] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/27/2015] [Revised: 05/12/2015] [Accepted: 05/20/2015] [Indexed: 12/11/2022] Open
Abstract
In the present study, the possible effect of sodium valproate (NaVP) on urethane-induced lung tumors in female mice has been evaluated. BALB/c mice (n = 60; 4-6 weeks old, females) were used in the following groups: (1) urethane-treated; (2) urethane-NaVP-treated; (3) only NaVP-treated; (4) control. In the same groups, ovariectomized female mice (n = 60) were investigated. Urethane was given intraperitoneally, with a total dose of 50 mg/mouse. In NaVP-treated mice groups, 0.4% aqueous solution of NaVP was offered to mice ad libitum. The duration of the experiment was 6 months. The number of tumors per mouse in ovariectomized mice and in those treated with urethane and NaVP was significantly higher than in mice treated with urethane only (8.29 ± 0.58 versus 6.0 ± 0.63, p < 0.02). No significant difference in the number of tumors per mouse was revealed while comparing the nonovariectomized urethane- and urethane-NaVP-treated groups (p = 0.13). A significant decrease of adenocarcinoma number in ovariectomized mice treated with a urethane-NaVP as compared with ovariectomized mice treated with urethane only was found (p = 0.031). NaVP together with low estrogen may have a protective effect on the malignization of adenomas in ovariectomized mice.
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Affiliation(s)
- Donatas Stakisaitis
- Laboratory of Carcinogenesis and Tumor Pathophysiology, National Cancer Institute, Vilnius University, Santariskiu 1, LT-08660 Vilnius, Lithuania
| | - Raminta Mozuraite
- Department of Histology and Embryology, Lithuanian University of Health Sciences, Mickeviciaus 9, LT-44307 Kaunas, Lithuania
| | - Nomeda Juodziukyniene
- Department of Histology and Embryology, Lithuanian University of Health Sciences, Mickeviciaus 9, LT-44307 Kaunas, Lithuania
- Veterinary Academy, Lithuanian University of Health Sciences, Tilzes 18, LT-47181 Kaunas, Lithuania
| | - Janina Didziapetriene
- Laboratory of Carcinogenesis and Tumor Pathophysiology, National Cancer Institute, Vilnius University, Santariskiu 1, LT-08660 Vilnius, Lithuania
| | - Saule Uleckiene
- Laboratory of Carcinogenesis and Tumor Pathophysiology, National Cancer Institute, Vilnius University, Santariskiu 1, LT-08660 Vilnius, Lithuania
| | - Paulius Matusevicius
- Veterinary Academy, Lithuanian University of Health Sciences, Tilzes 18, LT-47181 Kaunas, Lithuania
| | - Angelija Valanciute
- Department of Histology and Embryology, Lithuanian University of Health Sciences, Mickeviciaus 9, LT-44307 Kaunas, Lithuania
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Cheng F, Liu C, Lin CC, Zhao J, Jia P, Li WH, Zhao Z. A Gene Gravity Model for the Evolution of Cancer Genomes: A Study of 3,000 Cancer Genomes across 9 Cancer Types. PLoS Comput Biol 2015; 11:e1004497. [PMID: 26352260 PMCID: PMC4564226 DOI: 10.1371/journal.pcbi.1004497] [Citation(s) in RCA: 61] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2015] [Accepted: 08/11/2015] [Indexed: 12/14/2022] Open
Abstract
Cancer development and progression result from somatic evolution by an accumulation of genomic alterations. The effects of those alterations on the fitness of somatic cells lead to evolutionary adaptations such as increased cell proliferation, angiogenesis, and altered anticancer drug responses. However, there are few general mathematical models to quantitatively examine how perturbations of a single gene shape subsequent evolution of the cancer genome. In this study, we proposed the gene gravity model to study the evolution of cancer genomes by incorporating the genome-wide transcription and somatic mutation profiles of ~3,000 tumors across 9 cancer types from The Cancer Genome Atlas into a broad gene network. We found that somatic mutations of a cancer driver gene may drive cancer genome evolution by inducing mutations in other genes. This functional consequence is often generated by the combined effect of genetic and epigenetic (e.g., chromatin regulation) alterations. By quantifying cancer genome evolution using the gene gravity model, we identified six putative cancer genes (AHNAK, COL11A1, DDX3X, FAT4, STAG2, and SYNE1). The tumor genomes harboring the nonsynonymous somatic mutations in these genes had a higher mutation density at the genome level compared to the wild-type groups. Furthermore, we provided statistical evidence that hypermutation of cancer driver genes on inactive X chromosomes is a general feature in female cancer genomes. In summary, this study sheds light on the functional consequences and evolutionary characteristics of somatic mutations during tumorigenesis by propelling adaptive cancer genome evolution, which would provide new perspectives for cancer research and therapeutics.
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Affiliation(s)
- Feixiong Cheng
- Department of Biomedical Informatics, Vanderbilt University School of Medicine, Nashville, Tennessee, United States of America
| | - Chuang Liu
- Alibaba Research Center for Complexity Sciences, Hangzhou Normal University, Hangzhou, Zhejiang, China
| | - Chen-Ching Lin
- Department of Biomedical Informatics, Vanderbilt University School of Medicine, Nashville, Tennessee, United States of America
| | - Junfei Zhao
- Department of Biomedical Informatics, Vanderbilt University School of Medicine, Nashville, Tennessee, United States of America
| | - Peilin Jia
- Department of Biomedical Informatics, Vanderbilt University School of Medicine, Nashville, Tennessee, United States of America
- Center for Quantitative Sciences, Vanderbilt University Medical Center, Nashville, Tennessee, United States of America
| | - Wen-Hsiung Li
- Department of Ecology and Evolution, University of Chicago, Chicago, Illinois, United States of America
- Biodiversity Research Center and Genomics Research Center, Academia Sinica, Taipei, Taiwan
| | - Zhongming Zhao
- Department of Biomedical Informatics, Vanderbilt University School of Medicine, Nashville, Tennessee, United States of America
- Center for Quantitative Sciences, Vanderbilt University Medical Center, Nashville, Tennessee, United States of America
- Department of Cancer Biology, Vanderbilt University School of Medicine, Nashville, Tennessee, United States of America
- * E-mail:
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21
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Bogue MA, Peters LL, Paigen B, Korstanje R, Yuan R, Ackert-Bicknell C, Grubb SC, Churchill GA, Chesler EJ. Accessing Data Resources in the Mouse Phenome Database for Genetic Analysis of Murine Life Span and Health Span. J Gerontol A Biol Sci Med Sci 2014; 71:170-7. [PMID: 25533306 PMCID: PMC4707687 DOI: 10.1093/gerona/glu223] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2014] [Accepted: 10/28/2014] [Indexed: 01/18/2023] Open
Abstract
Understanding the source of genetic variation in aging and using this variation to define the molecular mechanisms of healthy aging require deep and broad quantification of a host of physiological, morphological, and behavioral endpoints. The murine model is a powerful system in which to understand the relations across age-related phenotypes and to identify research models with variation in life span and health span. The Jackson Laboratory Nathan Shock Center of Excellence in the Basic Biology of Aging has performed broad characterization of aging in genetically diverse laboratory mice and has placed these data, along with data from several other major aging initiatives, into the interactive Mouse Phenome Database. The data may be accessed and analyzed by researchers interested in finding mouse models for specific aging processes, age-related health and disease states, and for genetic analysis of aging variation and trait covariation. We expect that by placing these data in the hands of the aging community that there will be (a) accelerated genetic analyses of aging processes, (b) discovery of genetic loci regulating life span, (c) identification of compelling correlations between life span and susceptibility for age-related disorders, and (d) discovery of concordant genomic loci influencing life span and aging phenotypes between mouse and humans.
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Affiliation(s)
- Molly A Bogue
- The Jackson Laboratory Nathan Shock Center of Excellence in the Basic Biology of Aging, The Jackson Laboratory, Bar Harbor, Maine.
| | - Luanne L Peters
- The Jackson Laboratory Nathan Shock Center of Excellence in the Basic Biology of Aging, The Jackson Laboratory, Bar Harbor, Maine
| | - Beverly Paigen
- The Jackson Laboratory Nathan Shock Center of Excellence in the Basic Biology of Aging, The Jackson Laboratory, Bar Harbor, Maine
| | - Ron Korstanje
- The Jackson Laboratory Nathan Shock Center of Excellence in the Basic Biology of Aging, The Jackson Laboratory, Bar Harbor, Maine
| | - Rong Yuan
- Southern Illinois University School of Medicine, Springfield
| | - Cheryl Ackert-Bicknell
- The Jackson Laboratory Nathan Shock Center of Excellence in the Basic Biology of Aging, The Jackson Laboratory, Bar Harbor, Maine
| | - Stephen C Grubb
- The Jackson Laboratory Nathan Shock Center of Excellence in the Basic Biology of Aging, The Jackson Laboratory, Bar Harbor, Maine
| | - Gary A Churchill
- The Jackson Laboratory Nathan Shock Center of Excellence in the Basic Biology of Aging, The Jackson Laboratory, Bar Harbor, Maine
| | - Elissa J Chesler
- The Jackson Laboratory Nathan Shock Center of Excellence in the Basic Biology of Aging, The Jackson Laboratory, Bar Harbor, Maine
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22
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Westcott PMK, Halliwill KD, To MD, Rashid M, Rust AG, Keane TM, Delrosario R, Jen KY, Gurley KE, Kemp CJ, Fredlund E, Quigley DA, Adams DJ, Balmain A. The mutational landscapes of genetic and chemical models of Kras-driven lung cancer. Nature 2014; 517:489-92. [PMID: 25363767 PMCID: PMC4304785 DOI: 10.1038/nature13898] [Citation(s) in RCA: 248] [Impact Index Per Article: 24.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2013] [Accepted: 09/29/2014] [Indexed: 02/07/2023]
Abstract
Next-generation sequencing of human tumours has refined our understanding of the mutational processes operative in cancer initiation and progression, yet major questions remain regarding factors that induce driver mutations, and the processes that shape their selection during tumourigenesis. We performed whole-exome sequencing (WES) on adenomas from three mouse models of non-small cell lung cancer (NSCLC), induced by exposure to carcinogens (Methylnitrosourea (MNU) and Urethane), or by genetic activation of Kras (KrasLA2). Although the MNU-induced tumours carried exactly the same initiating mutation in Kras as seen in the KrasLA2 model (G12D), MNU tumours had an average of 192 non-synonymous, somatic single nucleotide variants (SNVs), compared to only 6 in tumours from the KrasLA2 model. In contrast, the KrasLA2 tumours exhibited a significantly higher level of aneuploidy and copy number alterations (CNAs) compared to the carcinogen-induced tumours, suggesting that carcinogen and genetically-engineered models adopt different routes to tumour development. The wild type (WT) allele of Kras has been shown to act as a tumour suppressor in mouse models of NSCLC. We demonstrate that urethane-induced tumours from WT mice carry mostly (94%) Q61R Kras mutations, while those from Kras heterozygous animals carry mostly (92%) Q61L mutations, indicating a major role of germline Kras status in mutation selection during initiation. The exome-wide mutation spectra in carcinogen-induced tumours overwhelmingly display signatures of the initiating carcinogen, while adenocarcinomas acquire additional C>T mutations at CpG sites. These data provide a basis for understanding the conclusions from human tumour genome sequencing that identified two broad categories based on relative frequency of SNVs and CNAs1, and underline the importance of carcinogen models for understanding the complex mutation spectra seen in human cancers.
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Affiliation(s)
- Peter M K Westcott
- 1] Helen Diller Family Comprehensive Cancer Center, University of California San Francisco, San Francisco, California 94158, USA [2] Department of Bioengineering and Therapeutic Sciences, University of California San Francisco, San Francisco, California 94158, USA
| | - Kyle D Halliwill
- 1] Helen Diller Family Comprehensive Cancer Center, University of California San Francisco, San Francisco, California 94158, USA [2] Department of Bioengineering and Therapeutic Sciences, University of California San Francisco, San Francisco, California 94158, USA
| | - Minh D To
- Helen Diller Family Comprehensive Cancer Center, University of California San Francisco, San Francisco, California 94158, USA
| | - Mamunur Rashid
- Experimental Cancer Genetics, Wellcome Trust Sanger Institute, Hinxton, Cambridge CB10 1HH, UK
| | - Alistair G Rust
- Experimental Cancer Genetics, Wellcome Trust Sanger Institute, Hinxton, Cambridge CB10 1HH, UK
| | - Thomas M Keane
- Experimental Cancer Genetics, Wellcome Trust Sanger Institute, Hinxton, Cambridge CB10 1HH, UK
| | - Reyno Delrosario
- Helen Diller Family Comprehensive Cancer Center, University of California San Francisco, San Francisco, California 94158, USA
| | - Kuang-Yu Jen
- Department of Pathology, University of California San Francisco, San Francisco, California 94143, USA
| | - Kay E Gurley
- Fred Hutchinson Cancer Research Center, Seattle, Washington 98109, USA
| | | | - Erik Fredlund
- Science for Life Laboratory, Department of Oncology-Pathology, Karolinska Institute, Stockholm 171 21, Sweden
| | - David A Quigley
- Helen Diller Family Comprehensive Cancer Center, University of California San Francisco, San Francisco, California 94158, USA
| | - David J Adams
- Experimental Cancer Genetics, Wellcome Trust Sanger Institute, Hinxton, Cambridge CB10 1HH, UK
| | - Allan Balmain
- 1] Helen Diller Family Comprehensive Cancer Center, University of California San Francisco, San Francisco, California 94158, USA [2] Department of Biochemistry and Biophysics, University of California San Francisco, San Francisco, California 94158, USA
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Stakisaitis D, Uleckiene S, Didziapetriene J, Valanciute A, Mozuraite R, Matusevicius P. Sodium valproate enhances urethane tumorigenicity in lungs of male but not female mice. EXCLI JOURNAL 2014; 13:667-87. [PMID: 26417291 PMCID: PMC4464513] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/03/2014] [Accepted: 05/12/2014] [Indexed: 11/23/2022]
Abstract
In the study, the possible effect of sodium valproate (NaVP) on urethane-induced lung tumors in mice has been evaluated. BALB/c mice (n = 120; 4-6 weeks old, both sexes) were used in the following groups: 1) urethane-treated, 2) urethane-NaVP-treated, 3) only NaVP-treated, 4) control. In the same groups, castrated male mice (n = 48) were investigated. Urethane was given by intraperitoneal injections 10 mg/mouse, twice a week, the total dose 50 mg/mouse. In NaVP-treated mice, the 0.4 % NaVP aqueous solution was offered to mice ad libitum. The duration of the experiment was 6 months. The number of tumors per mouse in urethane-NaVP-treated males was significantly higher than in those treated with urethane only (13.82 ± 1.12 vs 6.77 ± 0.43, p < 0.0001). No significant difference in the number of tumors per mouse was revealed while comparing the female urethane- and urethane-NaVP-treated groups (6.50 ± 0.79 vs 8.15 ± 0.55, p = 0.105). No difference in the number of tumors per mouse was found in urethane-NaVP-treated castrated males as compared with urethane-treated castrated males. However, in the urethane-NaVP-treated castrated males the number of tumors per mouse was significantly lower than in analogous non-castrated males (7.8 ± 1.67 vs 13.82 ± 1.12, p < 0.01). NaVP combined with urethane potentiates urethane tumorigenicity in BALB/c non-castrated but not in female and castrated male mice. These data indicate an important role of testosterone in the urethane-NaVP induced lung tumorigenesis.
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Affiliation(s)
- Donatas Stakisaitis
- Laboratory of Carcinogenesis and Tumor Pathophysiology, Institute of Oncology, Vilnius University, Vilnius, Lithuania,Mykolas Romeris University, Vilnius, Lithuania,*To whom correspondence should be addressed: Donatas Stakisaitis, Laboratory of Carcinogenesis and Tumor Pathophysiology, Institute of Oncology, Vilnius University, Santariskiu 1, Vilnius LT-08660, Lithuania; phone +37064641384, E-mail:
| | - Saule Uleckiene
- Laboratory of Carcinogenesis and Tumor Pathophysiology, Institute of Oncology, Vilnius University, Vilnius, Lithuania
| | - Janina Didziapetriene
- Laboratory of Carcinogenesis and Tumor Pathophysiology, Institute of Oncology, Vilnius University, Vilnius, Lithuania
| | - Angelija Valanciute
- Lithuanian University of Health Sciences, Department of Histology and Embryology, Kaunas, Lithuania
| | - Raminta Mozuraite
- Lithuanian University of Health Sciences, Department of Histology and Embryology, Kaunas, Lithuania
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Limacher JM, Spring-Giusti C, Bellon N, Ancian P, Rooke R, Bonnefoy JY. Therapeutic cancer vaccines in the treatment of non-small-cell lung cancer. Expert Rev Vaccines 2014; 12:263-70. [DOI: 10.1586/erv.13.14] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Schofield PN, Sundberg JP, Sundberg BA, McKerlie C, Gkoutos GV. The mouse pathology ontology, MPATH; structure and applications. J Biomed Semantics 2013; 4:18. [PMID: 24033988 PMCID: PMC3851164 DOI: 10.1186/2041-1480-4-18] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2013] [Accepted: 08/19/2013] [Indexed: 12/18/2022] Open
Abstract
BACKGROUND The capture and use of disease-related anatomic pathology data for both model organism phenotyping and human clinical practice requires a relatively simple nomenclature and coding system that can be integrated into data collection platforms (such as computerized medical record-keeping systems) to enable the pathologist to rapidly screen and accurately record observations. The MPATH ontology was originally constructed in 2,000 by a committee of pathologists for the annotation of rodent histopathology images, but is now widely used for coding and analysis of disease and phenotype data for rodents, humans and zebrafish. CONSTRUCTION AND CONTENT MPATH is divided into two main branches describing pathological processes and structures based on traditional histopathological principles. It does not aim to include definitive diagnoses, which would generally be regarded as disease concepts. It contains 888 core pathology terms in an almost exclusively is_a hierarchy nine layers deep. Currently, 86% of the terms have textual definitions and contain relationships as well as logical axioms to other ontologies such the Gene Ontology. APPLICATION AND UTILITY MPATH was originally devised for the annotation of histopathological images from mice but is now being used much more widely in the recording of diagnostic and phenotypic data from both mice and humans, and in the construction of logical definitions for phenotype and disease ontologies. We discuss the use of MPATH to generate cross-products with qualifiers derived from a subset of the Phenotype and Trait Ontology (PATO) and its application to large-scale high-throughput phenotyping studies. MPATH provides a largely species-agnostic ontology for the descriptions of anatomic pathology, which can be applied to most amniotes and is now finding extensive use in species other than mice. It enables investigators to interrogate large datasets at a variety of depths, use semantic analysis to identify the relations between diseases in different species and integrate pathology data with other data types, such as pharmacogenomics.
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Affiliation(s)
- Paul N Schofield
- Department of Physiology, Development and Neuroscience, University of Cambridge, Downing Street, CB2 3EG, Cambridge, UK.
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Establishment and Validation of an Orthotopic Metastatic Mouse Model of Colorectal Cancer. ISRN HEPATOLOGY 2013; 2013:206875. [PMID: 27340651 PMCID: PMC4907346 DOI: 10.1155/2013/206875] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/22/2013] [Accepted: 03/17/2013] [Indexed: 12/24/2022]
Abstract
Metastases are largely responsible for cancer deaths in solid tumors due to the lack of effective therapies against disseminated disease, and there is an urgent need to fill this gap. This study demonstrates an orthotopic colorectal cancer (CRC) mouse model system to develop spontaneous metastasis in vivo and compare its reproducibility against human CRC. IGF1R-dependent GEO human CRC cells were used to study metastatic colonization using orthotopic transplantation procedures and demonstrated robust liver metastasis. Cell proliferation assays were performed both in the orthotopic primary colon and liver metastatic tumors, and human CRC patient's specimen and similar patterns in H&E and Ki67 staining were observed between the orthotopically generated primary and liver metastatic tumors and human CRC specimens. Microarray analysis was performed to generate gene signatures, compared with deposited human CRC gene expression data sets, analyzed by Oncomine, and revealed similarity in gene signatures with increased aggressive markers expression associated with CRC in orthotopically generated liver metastasis. Thus, we have developed an orthotopic mouse model that reproduces human CRC metastasis. This model system can be effective in developing new therapeutic strategies against disseminated disease and could be implemented for identifying genes that regulate the development and/or maintenance of established metastasis.
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Paun A, Lemay AM, Tomko TG, Haston CK. Association Analysis Reveals Genetic Variation Altering Bleomycin-Induced Pulmonary Fibrosis in Mice. Am J Respir Cell Mol Biol 2013; 48:330-6. [DOI: 10.1165/rcmb.2012-0078oc] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
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28
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Genomic and genome-wide association of susceptibility to radiation-induced fibrotic lung disease in mice. Radiother Oncol 2012; 105:350-7. [DOI: 10.1016/j.radonc.2012.08.004] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2012] [Revised: 07/10/2012] [Accepted: 08/11/2012] [Indexed: 12/13/2022]
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Stearns TM, Cario CL, Savage HS, Sundberg JP, Paigen B, Berndt A. Early gene expression differences in inbred mouse strains with susceptibility to pulmonary adenomas. Exp Mol Pathol 2012; 93:455-61. [PMID: 23026400 DOI: 10.1016/j.yexmp.2012.09.015] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2012] [Accepted: 09/20/2012] [Indexed: 10/27/2022]
Abstract
Lung cancer is the most common cause of cancer-related deaths in both men and women, and effective preventatives are rare due to the difficulty of early detection. Specific gene expression signatures have been identified in individuals that already developed lung cancer. To identify if gene expression differences could be detected in individuals before the onset of the disease, we obtained lung tissues for microarray analysis from young, healthy mice of 9 inbred strains with known differences in their susceptibility to spontaneous pulmonary adenomas when aged. We found that the most common differentially expressed genes among all possible 36 strain comparisons showed significant associations with cancer- and inflammation-related processes. Significant expression differences between susceptible and resistant strains were detected for Aldh3a1, Cxcr1 and 7, Dpt, and Nptx1-genes with known cancer-related functions, and Cd209, Cxcr1 and 7, and Plag2g1b-genes with known inflammatory-related functions. Whereas Aldh3a1, Cd209, Dpt, and Pla2g1b had increased expression, Cxcr1 and 7, and Nptx1 had decreased expression in strains susceptible to pulmonary adenomas. Thus, our study shows that expression differences between susceptible and resistant strains can be detected in young and healthy mice without manifestation of pulmonary adenomas and, thus, may provide an opportunity of early detection. Finally, the identified genes have previously been reported for human non-small cell lung cancer suggesting that molecular pathways may be shared between these two cancer types.
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Courtney SM, Massett MP. Identification of exercise capacity QTL using association mapping in inbred mice. Physiol Genomics 2012; 44:948-55. [PMID: 22911454 DOI: 10.1152/physiolgenomics.00051.2012] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
There are large interindividual differences in exercise capacity. It is well established that there is a genetic basis for these differences. However, the genetic factors underlying this variation are undefined. Therefore, the purpose of this study was to identify novel putative quantitative trait loci (QTL) for exercise capacity by measuring exercise capacity in inbred mice and performing genome-wide association mapping. Exercise capacity, defined as run time and work, was assessed in male mice (n = 6) from 34 strains of classical and wild-derived inbred mice performing a graded treadmill test. Genome-wide association mapping was performed with an efficient mixed-model association (EMMA) algorithm to identify QTL. Exercise capacity was significantly different across strains. Run time varied by 2.7-fold between the highest running strain (C58/J) and the lowest running strain (A/J). These same strains showed a 16.5-fold difference in work. Significant associations were identified for exercise time on chromosomes 1, 2, 7, 11, and 13. The QTL interval on chromosome 2 (~168 Mb) contains one gene, Nfatc2, and overlaps with a suggestive QTL for training responsiveness in humans. These results provide phenotype data on the widest range of inbred strains tested thus far and indicate that genetic background significantly influences exercise capacity. Furthermore, the novel QTLs identified in the current study provide new targets for investigating the underlying mechanisms for variation in exercise capacity.
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Affiliation(s)
- Sean M Courtney
- Department of Health and Kinesiology, Texas A&M University, College Station, Texas 77843-4243, USA
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DNA methylation biomarkers for lung cancer. Tumour Biol 2011; 33:287-96. [DOI: 10.1007/s13277-011-0282-2] [Citation(s) in RCA: 102] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2011] [Accepted: 11/21/2011] [Indexed: 01/13/2023] Open
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