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Salnikov P, Korablev A, Serova I, Belokopytova P, Yan A, Stepanchuk Y, Tikhomirov S, Fishman V. Structural variants in the Epb41l4a locus: TAD disruption and Nrep gene misregulation as hypothetical drivers of neurodevelopmental outcomes. Sci Rep 2024; 14:5288. [PMID: 38438377 PMCID: PMC10912600 DOI: 10.1038/s41598-024-52545-y] [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: 09/13/2023] [Accepted: 01/19/2024] [Indexed: 03/06/2024] Open
Abstract
Structural variations are a pervasive feature of human genomes, and there is growing recognition of their role in disease development through their impact on spatial chromatin architecture. This understanding has led us to investigate the clinical significance of CNVs in noncoding regions that influence TAD structures. In this study, we focused on the Epb41l4a locus, which contains a highly conserved TAD boundary present in both human chromosome 5 and mouse chromosome 18, and its association with neurodevelopmental phenotypes. Analysis of human data from the DECIPHER database indicates that CNVs within this locus, including both deletions and duplications, are often observed alongside neurological abnormalities, such as dyslexia and intellectual disability, although there is not enough evidence of a direct correlation or causative relationship. To investigate these possible associations, we generated mouse models with deletion and inversion mutations at this locus and carried out RNA-seq analysis to elucidate gene expression changes. We found that modifications in the Epb41l4a TAD boundary led to dysregulation of the Nrep gene, which plays a crucial role in nervous system development. These findings underscore the potential pathogenicity of these CNVs and highlight the crucial role of spatial genome architecture in gene expression regulation.
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Affiliation(s)
- Paul Salnikov
- Institute of Cytology and Genetics SB RAS, Novosibirsk, Russia
- Novosibirsk State University, Novosibirsk, Russia
| | - Alexey Korablev
- Institute of Cytology and Genetics SB RAS, Novosibirsk, Russia
| | - Irina Serova
- Institute of Cytology and Genetics SB RAS, Novosibirsk, Russia
| | - Polina Belokopytova
- Institute of Cytology and Genetics SB RAS, Novosibirsk, Russia
- Novosibirsk State University, Novosibirsk, Russia
| | - Aleksandra Yan
- Institute of Cytology and Genetics SB RAS, Novosibirsk, Russia
- Novosibirsk State University, Novosibirsk, Russia
| | - Yana Stepanchuk
- Institute of Cytology and Genetics SB RAS, Novosibirsk, Russia
- Novosibirsk State University, Novosibirsk, Russia
| | - Savelii Tikhomirov
- Institute of Cytology and Genetics SB RAS, Novosibirsk, Russia
- Novosibirsk State University, Novosibirsk, Russia
| | - Veniamin Fishman
- Institute of Cytology and Genetics SB RAS, Novosibirsk, Russia.
- Novosibirsk State University, Novosibirsk, Russia.
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Dias De Castro LL, Oliveira Júnior GA, Perez BC, Carvalho ME, De Souza Ramos EA, Ferraz JBS, Molento MB. Genome-wide association study in thoroughbred horses naturally infected with cyathostomins. Anim Biotechnol 2023; 34:2467-2479. [PMID: 35856721 DOI: 10.1080/10495398.2022.2099880] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022]
Abstract
Cyathostomins are considered one of the most important parasites of horses. A group of horses within a herd can be responsible for eliminating the majority of parasite eggs. This phenotype might be explained by genetic factors. This study aimed to identify genomic regions associated with fecal egg count (FEC) and hematological parameters by performing a genomic-wide association study (GWAS) in Thoroughbred horses naturally infected with cyathostomins. Packed cell volume (PCV), differential leukocyte, and FEC were determined from 90 horses. All animals were genotyped using the Illumina Equine 70 K BeadChip panel containing 65,157 SNP markers. The five genomic windows that have explained the highest percentage of the additive genetic variance of a specific trait (top 5) were further explored to identify candidate genes. A total of 33, 21, 30, 21, and 19 genes were identified for FEC, PCV, eosinophils, neutrophils, and lymphocyte count, respectively. The top 5 marker regions explained 2.86, 2.56, 2.73, 2.33, and 2.37% of the additive genetic variation of FEC, PCV, eosinophils, neutrophils, and lymphocytes count, respectively. This is the first study correlating phenotypic horse health traits to GWAS analysis, which may be used for animal breeding activities, reducing losses due to parasite infections.
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Affiliation(s)
- Luciana L Dias De Castro
- Laboratory of Parasitology, Department of Veterinary Medicine, University of Caxias do Sul. R: Francisco Getúlio Vargas, Caxias do Sul, Brazil
| | - Gerson A Oliveira Júnior
- College of Animal Science and Food Science, University of São Paulo, Pirassununga, Brazil
- Centre for Genetic Improvement of Livestock, Department of Animal Biosciences, University of Guelph, Guelph, Canada
| | - Bruno Costa Perez
- College of Animal Science and Food Science, University of São Paulo, Pirassununga, Brazil
| | - Minos E Carvalho
- College of Animal Science and Food Science, University of São Paulo, Pirassununga, Brazil
| | - Edneia A De Souza Ramos
- Laboratory of Epigenetics, Department of Pathology, Federal University of Parana, Curitiba, Brazil
| | - José Bento S Ferraz
- College of Animal Science and Food Science, University of São Paulo, Pirassununga, Brazil
| | - Marcelo Beltrão Molento
- Laboratory of Veterinary Clinical Parasitology, Department of Veterinary Medicine, Federal University of Parana, Curitiba, Brazil
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Mani S, Aiyegoro OA, Adeleke MA. Association between host genetics of sheep and the rumen microbial composition. Trop Anim Health Prod 2022; 54:109. [PMID: 35192073 DOI: 10.1007/s11250-022-03057-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2021] [Accepted: 01/04/2022] [Indexed: 10/19/2022]
Abstract
A synergy between the rumen microbiota and the host genetics has created a symbiotic relationship, beneficial to the host's health. In this study, the association between the host genetics and rumen microbiome of Damara and Meatmaster sheep was investigated. The composition of rumen microbiota was estimated through the analysis of the V3-V4 region of the 16S rRNA gene, while the sheep blood DNA was genotyped with Illumina OvineSNP50 BeadChip and the genome-wide association (GWA) was analyzed. Sixty significant SNPs dispersed in 21 regions across the Ovis aries genome were found to be associated with the relative abundance of seven genera: Acinetobacter, Bacillus, Clostridium, Flavobacterium, Prevotella, Pseudomonas, and Streptobacillus. A total of eighty-four candidate genes were identified, and their functional annotations were mainly associated with immunity responses and function, metabolism, and signal transduction. Our results propose that those candidate genes identified in the study may be modulating the composition of rumen microbiota and further indicating the significance of comprehending the interactions between the host and rumen microbiota to gain better insight into the health of sheep.
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Affiliation(s)
- Sinalo Mani
- GI Microbiology and Biotechnology Unit, Agricultural Research Council- Animal Production, Private Bag X02, Irene, 0062, South Africa.,Discipline of Genetics, School of Life Sciences, College of Agriculture, Engineering and Science, University of KwaZulu-Natal, Westville, P/Bag X54001, Durban, 4000, South Africa
| | - Olayinka Ayobami Aiyegoro
- GI Microbiology and Biotechnology Unit, Agricultural Research Council- Animal Production, Private Bag X02, Irene, 0062, South Africa. .,Research Unit for Environmental Sciences and Management, North West University, Potchefstroom, 2520, South Africa.
| | - Matthew Adekunle Adeleke
- Discipline of Genetics, School of Life Sciences, College of Agriculture, Engineering and Science, University of KwaZulu-Natal, Westville, P/Bag X54001, Durban, 4000, South Africa
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Scharf F, Leal Silva RM, Morak M, Hastie A, Pickl JMA, Sendelbach K, Gebhard C, Locher M, Laner A, Steinke-Lange V, Koehler U, Holinski-Feder E, Wolf DA. Constitutional chromothripsis of the APC locus as a cause of genetic predisposition to colon cancer. J Med Genet 2021; 59:976-983. [PMID: 34911816 PMCID: PMC9554066 DOI: 10.1136/jmedgenet-2021-108147] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2021] [Accepted: 11/11/2021] [Indexed: 11/21/2022]
Abstract
Purpose Approximately 20% of patients with clinical familial adenomatous polyposis (FAP) remain unsolved after molecular genetic analysis of the APC and other polyposis genes, suggesting additional pathomechanisms. Methods We applied multidimensional genomic analysis employing chromosomal microarray profiling, optical mapping, long-read genome and RNA sequencing combined with FISH and standard PCR of genomic and complementary DNA to decode a patient with an attenuated FAP that had remained unsolved by Sanger sequencing and multigene panel next-generation sequencing for years. Results We identified a complex 3.9 Mb rearrangement involving 14 fragments from chromosome 5q22.1q22.3 of which three were lost, 1 reinserted into chromosome 5 and 10 inserted into chromosome 10q21.3 in a seemingly random order and orientation thus fulfilling the major criteria of chromothripsis. The rearrangement separates APC promoter 1B from the coding ORF (open reading frame) thus leading to allele-specific downregulation of APC mRNA. The rearrangement also involves three additional genes implicated in the APC–Axin–GSK3B–β-catenin signalling pathway. Conclusions Based on comprehensive genomic analysis, we propose that constitutional chromothripsis dampening APC expression, possibly modified by additional APC–Axin–GSK3B–β-catenin pathway disruptions, underlies the patient’s clinical phenotype. The combinatorial approach we deployed provides a powerful tool set for deciphering unsolved familial polyposis and potentially other tumour syndromes and monogenic diseases.
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Affiliation(s)
| | | | - Monika Morak
- MGZ - Medizinisch Genetisches Zentrum, Munich, Germany
| | - Alex Hastie
- BioNano Genomics Inc, San Diego, California, USA
| | | | | | | | | | - Andreas Laner
- MGZ - Medizinisch Genetisches Zentrum, Munich, Germany
| | | | - Udo Koehler
- MGZ - Medizinisch Genetisches Zentrum, Munich, Germany
| | - Elke Holinski-Feder
- MGZ - Medizinisch Genetisches Zentrum, Munich, Germany .,Medizinische Klinik und Poliklinik IV, Campus Innenstadt, Klinikum der Universität München, Munich, Germany
| | - Dieter A Wolf
- MGZ - Medizinisch Genetisches Zentrum, Munich, Germany .,Department of Medicine II, Klinikum rechts der Isar, Technical University Munich, Munich, Germany
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Comiskey DF, He H, Liyanarachchi S, Sheikh MS, Hendrickson IV, Yu L, Brock PL, de la Chapelle A. Characterizing the function of EPB41L4A in the predisposition to papillary thyroid carcinoma. Sci Rep 2020; 10:19984. [PMID: 33203992 PMCID: PMC7672090 DOI: 10.1038/s41598-020-76606-0] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2020] [Accepted: 10/20/2020] [Indexed: 12/21/2022] Open
Abstract
Papillary thyroid carcinoma (PTC) is the most common histotype of thyroid carcinoma. The heritability of PTC is high compared to other cancers, but its underlying causes are unknown. A recent genome-wide association study revealed the association of a variant at the 5q22 locus, rs73227498, with PTC predisposition. We report that rs17134155, a variant in high linkage disequilibrium with rs73227498, is located in an enhancer region downstream of coding transcripts of EPB41L4A. Rs17134155 showed significant enhancer activity in luciferase assays, and haplotypes containing the protective allele of this variant conferred a significantly lower risk of PTC. While the index SNP, rs73227498, acted as a significant cis-eQTL for expression of EPB41L4A, rs17134155 was a significant cis-sQTL for the alternative splicing of a non-coding transcript of EPB41L4A, called EPB41L4A-203. We also performed knockdown of EPB41L4A followed by microarray analysis. Some of the top differentially-expressed genes were represented among regulators of the WNT/β-catenin signaling pathway. Our results indicate that an enhancer region at 5q22 regulates the expression and splicing of EPB41L4A transcripts. We also provide evidence that EPB41L4A expression is involved in regulating growth and differentiation pathways, suggesting that decreased expression of EPB41L4A is a mechanism in the predisposition to PTC.
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Affiliation(s)
- Daniel F Comiskey
- Human Cancer Genetics Program and Department of Cancer Biology and Genetics, Comprehensive Cancer Center, College of Medicine, The Ohio State University Wexner Medical Center, 804 Biomedical Research Tower, 460 W 12th Ave., Columbus, OH, 43210, USA
| | - Huiling He
- Human Cancer Genetics Program and Department of Cancer Biology and Genetics, Comprehensive Cancer Center, College of Medicine, The Ohio State University Wexner Medical Center, 804 Biomedical Research Tower, 460 W 12th Ave., Columbus, OH, 43210, USA
| | - Sandya Liyanarachchi
- Human Cancer Genetics Program and Department of Cancer Biology and Genetics, Comprehensive Cancer Center, College of Medicine, The Ohio State University Wexner Medical Center, 804 Biomedical Research Tower, 460 W 12th Ave., Columbus, OH, 43210, USA
| | - Mehek S Sheikh
- Human Cancer Genetics Program and Department of Cancer Biology and Genetics, Comprehensive Cancer Center, College of Medicine, The Ohio State University Wexner Medical Center, 804 Biomedical Research Tower, 460 W 12th Ave., Columbus, OH, 43210, USA
| | - Isabella V Hendrickson
- Human Cancer Genetics Program and Department of Cancer Biology and Genetics, Comprehensive Cancer Center, College of Medicine, The Ohio State University Wexner Medical Center, 804 Biomedical Research Tower, 460 W 12th Ave., Columbus, OH, 43210, USA
| | - Lianbo Yu
- Center for Biostatistics, The Ohio State University Wexner Medical Center, Columbus, OH, 43210, USA
| | - Pamela L Brock
- Department of Internal Medicine, Comprehensive Cancer Center, The Ohio State University Wexner Medical Center, Columbus, OH, 43210, USA
| | - Albert de la Chapelle
- Human Cancer Genetics Program and Department of Cancer Biology and Genetics, Comprehensive Cancer Center, College of Medicine, The Ohio State University Wexner Medical Center, 804 Biomedical Research Tower, 460 W 12th Ave., Columbus, OH, 43210, USA.
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LncRNA Profiling Reveals That the Deregulation of H19, WT1-AS, TCL6, and LEF1-AS1 Is Associated with Higher-Risk Myelodysplastic Syndrome. Cancers (Basel) 2020; 12:cancers12102726. [PMID: 32977510 PMCID: PMC7598221 DOI: 10.3390/cancers12102726] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2020] [Revised: 09/18/2020] [Accepted: 09/20/2020] [Indexed: 02/01/2023] Open
Abstract
Simple Summary Although lncRNAs have been increasingly recognized as regulators of hematopoiesis, only several studies addressed their role in myelodysplastic syndrome (MDS). By genome-wide profiling, we identified lncRNAs deregulated in various groups of MDS patients. We computationally constructed lncRNA-protein coding gene networks to associate deregulated lncRNAs with cellular processes involved in MDS. We showed that expression of H19, WT1-AS, TCL6, and LEF1-AS1 lncRNAs associate with higher-risk MDS and proposed processes related with these transcripts. Abstract Background: myelodysplastic syndrome (MDS) is a hematopoietic stem cell disorder with an incompletely known pathogenesis. Long noncoding RNAs (lncRNAs) play multiple roles in hematopoiesis and represent a new class of biomarkers and therapeutic targets, but information on their roles in MDS is limited. Aims: here, we aimed to characterize lncRNAs deregulated in MDS that may function in disease pathogenesis. In particular, we focused on the identification of lncRNAs that could serve as novel potential biomarkers of adverse outcomes in MDS. Methods: we performed microarray expression profiling of lncRNAs and protein-coding genes (PCGs) in the CD34+ bone marrow cells of MDS patients. Expression profiles were analyzed in relation to different aspects of the disease (i.e., diagnosis, disease subtypes, cytogenetic and mutational aberrations, and risk of progression). LncRNA-PCG networks were constructed to link deregulated lncRNAs with regulatory mechanisms associated with MDS. Results: we found several lncRNAs strongly associated with disease pathogenesis (e.g., H19, WT1-AS, TCL6, LEF1-AS1, EPB41L4A-AS1, PVT1, GAS5, and ZFAS1). Of these, downregulation of LEF1-AS1 and TCL6 and upregulation of H19 and WT1-AS were associated with adverse outcomes in MDS patients. Multivariate analysis revealed that the predominant variables predictive of survival are blast count, H19 level, and TP53 mutation. Coexpression network data suggested that prognosis-related lncRNAs are predominantly related to cell adhesion and differentiation processes (H19 and WT1-AS) and mechanisms such as chromatin modification, cytokine response, and cell proliferation and death (LEF1-AS1 and TCL6). In addition, we observed that transcriptional regulation in the H19/IGF2 region is disrupted in higher-risk MDS, and discordant expression in this locus is associated with worse outcomes. Conclusions: we identified specific lncRNAs contributing to MDS pathogenesis and proposed cellular processes associated with these transcripts. Of the lncRNAs associated with patient prognosis, the level of H19 transcript might serve as a robust marker comparable to the clinical variables currently used for patient stratification.
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Godel M, Morena D, Ananthanarayanan P, Buondonno I, Ferrero G, Hattinger CM, Di Nicolantonio F, Serra M, Taulli R, Cordero F, Riganti C, Kopecka J. Small Nucleolar RNAs Determine Resistance to Doxorubicin in Human Osteosarcoma. Int J Mol Sci 2020; 21:ijms21124500. [PMID: 32599901 PMCID: PMC7349977 DOI: 10.3390/ijms21124500] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2020] [Revised: 06/19/2020] [Accepted: 06/21/2020] [Indexed: 02/07/2023] Open
Abstract
Doxorubicin (Dox) is one of the most important first-line drugs used in osteosarcoma therapy. Multiple and not fully clarified mechanisms, however, determine resistance to Dox. With the aim of identifying new markers associated with Dox-resistance, we found a global up-regulation of small nucleolar RNAs (snoRNAs) in human Dox-resistant osteosarcoma cells. We investigated if and how snoRNAs are linked to resistance. After RT-PCR validation of snoRNAs up-regulated in osteosarcoma cells with different degrees of resistance to Dox, we overexpressed them in Dox-sensitive cells. We then evaluated Dox cytotoxicity and changes in genes relevant for osteosarcoma pathogenesis by PCR arrays. SNORD3A, SNORA13 and SNORA28 reduced Dox-cytotoxicity when over-expressed in Dox-sensitive cells. In these cells, GADD45A and MYC were up-regulated, TOP2A was down-regulated. The same profile was detected in cells with acquired resistance to Dox. GADD45A/MYC-silencing and TOP2A-over-expression counteracted the resistance to Dox induced by snoRNAs. We reported for the first time that snoRNAs induce resistance to Dox in human osteosarcoma, by modulating the expression of genes involved in DNA damaging sensing, DNA repair, ribosome biogenesis, and proliferation. Targeting snoRNAs or down-stream genes may open new treatment perspectives in chemoresistant osteosarcomas.
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Affiliation(s)
- Martina Godel
- Department of Oncology, University of Torino, 1026 Torino, Italy; (M.G.); (D.M.); (P.A.); (I.B.); (F.D.N.); (R.T.)
| | - Deborah Morena
- Department of Oncology, University of Torino, 1026 Torino, Italy; (M.G.); (D.M.); (P.A.); (I.B.); (F.D.N.); (R.T.)
| | - Preeta Ananthanarayanan
- Department of Oncology, University of Torino, 1026 Torino, Italy; (M.G.); (D.M.); (P.A.); (I.B.); (F.D.N.); (R.T.)
| | - Ilaria Buondonno
- Department of Oncology, University of Torino, 1026 Torino, Italy; (M.G.); (D.M.); (P.A.); (I.B.); (F.D.N.); (R.T.)
| | - Giulio Ferrero
- Department of Computer Science, University of Torino, 10149 Torino, Italy; (G.F.); (F.C.)
- Department of Clinical and Biological Sciences, University of Torino, 10043 Orbassano, Italy
| | - Claudia M. Hattinger
- Laboratory of Experimental Oncology, Pharmacogenomics and Pharmacogenetics Research Unit, IRCCS Istituto Ortopedico Rizzoli, 40136 Bologna, Italy; (C.M.H.); (M.S.)
| | - Federica Di Nicolantonio
- Department of Oncology, University of Torino, 1026 Torino, Italy; (M.G.); (D.M.); (P.A.); (I.B.); (F.D.N.); (R.T.)
- Candiolo Cancer Institute, FPO–IRCCS, 10060 Candiolo, Italy
| | - Massimo Serra
- Laboratory of Experimental Oncology, Pharmacogenomics and Pharmacogenetics Research Unit, IRCCS Istituto Ortopedico Rizzoli, 40136 Bologna, Italy; (C.M.H.); (M.S.)
| | - Riccardo Taulli
- Department of Oncology, University of Torino, 1026 Torino, Italy; (M.G.); (D.M.); (P.A.); (I.B.); (F.D.N.); (R.T.)
| | - Francesca Cordero
- Department of Computer Science, University of Torino, 10149 Torino, Italy; (G.F.); (F.C.)
| | - Chiara Riganti
- Department of Oncology, University of Torino, 1026 Torino, Italy; (M.G.); (D.M.); (P.A.); (I.B.); (F.D.N.); (R.T.)
- Correspondence: (C.R.); (J.K.); Tel.: +39-0116705857 (C.R.); +39-0116705849 (J.K.)
| | - Joanna Kopecka
- Department of Oncology, University of Torino, 1026 Torino, Italy; (M.G.); (D.M.); (P.A.); (I.B.); (F.D.N.); (R.T.)
- Correspondence: (C.R.); (J.K.); Tel.: +39-0116705857 (C.R.); +39-0116705849 (J.K.)
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Zhang W, Lai R, He X, Liu X, Zhang Y, Yang Z, Yang P, Wang J, Hu K, Yuan X, Zhang X, Liu W, Jing H. Clinical prognostic implications of EPB41L4A expression in multiple myeloma. J Cancer 2020; 11:619-629. [PMID: 31942185 PMCID: PMC6959044 DOI: 10.7150/jca.33805] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2019] [Accepted: 11/04/2019] [Indexed: 02/06/2023] Open
Abstract
Background: Multiple myeloma (MM) is one of the most common incurable malignancies in malignant plasma cell disease. EPB41L4A is a target gene for the Wnt/β-catenin pathway, which is closely related to the survival of multiple myeloma cells. However, there is currently no research report on the prognostic significance of the EPB41L4A gene in MM. Methods: We studied the biological significance and prognostic significance of EPB41L4A expression in MM by integrating 1956 MM samples from 7 datasets, and explored the relationship between EPB41L4A expression and MM ISS stage, molecular type, therapeutic response and survival. Results: We found that the expression level of EPB41L4A is inversely proportional to the copy number of 1q21 (P = 3.4e-13). EPB41L4A was low expressed in MAF, MMSET and proliferating molecular typing patients (P <= 0.001). High expression of EPB41L4A can predict good survival in MM (EFS: P < 0.0001; OS: P < 0.0001). We found that patients with relapsed MM had lower expression levels of EPB41L4A than those without recurrence (P = 0.0039). We also found that EPB41L4A can predict the prognosis of MM patients may be related to DNA replication. These results indicate that the initial expression level of EPB41L4A can predict the prognosis of MM patients. Conclusions: We found that the high expression of EPB41L4A predicts good survival level in MM.
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Affiliation(s)
- Weilong Zhang
- Department of Hematology, Lymphoma Research Center, Peking University Third Hospital, Beijing, 100191, China
| | - Rui Lai
- Department of the Respiratory medicine, The People's Hospital of Ruijin City, Ruijin, 342500, China
- Department of Respiratory Medicine, First Affiliated Hospital Gannan Medical University, Ganzhou, 341000, China
| | - Xue He
- Department of Pathology, Beijing Tiantan Hospital, Capital Medical University, Beijing, 100070, China
| | - Xiaoni Liu
- Department of Respiratory Medicine, First Affiliated Hospital Gannan Medical University, Ganzhou, 341000, China
| | - Ye Zhang
- Melbourne School of Population and Global Health, The University of Melbourne, Victoria, 3010, Australia
| | - Zuozhen Yang
- Department of Hematology, Lymphoma Research Center, Peking University Third Hospital, Beijing, 100191, China
| | - Ping Yang
- Department of Hematology, Lymphoma Research Center, Peking University Third Hospital, Beijing, 100191, China
| | - Jing Wang
- Department of Hematology, Lymphoma Research Center, Peking University Third Hospital, Beijing, 100191, China
| | - Kai Hu
- Department of Hematology, Lymphoma Research Center, Peking University Third Hospital, Beijing, 100191, China
| | - Xiaoliang Yuan
- Department of Respiratory Medicine, First Affiliated Hospital Gannan Medical University, Ganzhou, 341000, China
| | - Xiuru Zhang
- Department of Pathology, Beijing Tiantan Hospital, Capital Medical University, Beijing, 100070, China
| | - Weiyou Liu
- Department of Respiratory Medicine, First Affiliated Hospital Gannan Medical University, Ganzhou, 341000, China
| | - Hongmei Jing
- Department of Hematology, Lymphoma Research Center, Peking University Third Hospital, Beijing, 100191, China
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Liu L, Zeng Z, Yi J, Zuo L, Lv J, Yuan J, Lin Z, Luo R, Feng X. Expression and clinical significance of transcription factor 4 (TCF4) in epithelial ovarian cancer. Cancer Biomark 2019; 24:213-221. [PMID: 30614797 DOI: 10.3233/cbm-181849] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Affiliation(s)
- Longyang Liu
- Department of Gynecology, Integrated Hospital of Traditional Chinese Medicine, Southern Medical University, Guangzhou, Guangdong 510315, China
- Department of Gynecology, Integrated Hospital of Traditional Chinese Medicine, Southern Medical University, Guangzhou, Guangdong 510315, China
| | - Zhaoyang Zeng
- Department of Gynecology, Integrated Hospital of Traditional Chinese Medicine, Southern Medical University, Guangzhou, Guangdong 510315, China
- Department of Gynecology, Integrated Hospital of Traditional Chinese Medicine, Southern Medical University, Guangzhou, Guangdong 510315, China
| | - Juanjuan Yi
- Department of Dermatovenereology, Foshan Maternal and Child Health Hospital, Foshan, Guangdong 528000, China
- Department of Gynecology, Integrated Hospital of Traditional Chinese Medicine, Southern Medical University, Guangzhou, Guangdong 510315, China
| | - Liu Zuo
- Cancer Center, Integrated Hospital of Traditional Chinese Medicine, Southern Medical University, Guangzhou, Guangdong, 510315, China
| | - Jin Lv
- Cancer Center, Integrated Hospital of Traditional Chinese Medicine, Southern Medical University, Guangzhou, Guangdong, 510315, China
| | - Jianhuan Yuan
- Department of Gynecology, The Fisrt People’s Hospital of Huizhou City, Huizhou, Guangdong 516000, China
| | - Zhongqiu Lin
- Department of Gynecology Oncology, The Memorial Hospital of Sun Yat-sen University, Guangzhou, Guangdong 510000, China
| | - Rongcheng Luo
- Cancer Center, Integrated Hospital of Traditional Chinese Medicine, Southern Medical University, Guangzhou, Guangdong, 510315, China
| | - Xin Feng
- Department of Gynecology Oncology, The Cancer Hospital of Guangzhou Medical University, Guangzhou, Guangdong 510000, China
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Identification and validation a TGF-β-associated long non-coding RNA of head and neck squamous cell carcinoma by bioinformatics method. J Transl Med 2018; 16:46. [PMID: 29490660 PMCID: PMC5831574 DOI: 10.1186/s12967-018-1418-6] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2017] [Accepted: 02/16/2018] [Indexed: 12/23/2022] Open
Abstract
BACKGROUND The role of transforming growth factorβ (TGF-β)-induced tumor progression in advanced malignancy is well established, but the involvement of long non-coding RNAs (lncRNAs) in TGF-β signaling remains unclear. This study aimed to identify TGF-β-associated lncRNAs in head and neck squamous cell carcinoma (HNSCC). METHODS Expression profiling of lncRNAs was obtained using Gene Expression Omnibus and The Cancer Genome Atlas. Real-time quantitative PCR was used to analyze the expression of EPB41L4A-AS2 in HNSCC cell line. We used bioinformatics resources (DAvID) to conduct Gene Ontology biological processes and KEGG pathways at the significant level. Wound healing assay, cell migration and invasion assays, were used to examine the effects of EPB41L4A-AS2 on tumor cell metastasis in vivo. Protein levels of EPB41L4A-AS2 targets were determined by western blot. RESULTS A novel TGF-β-associated lncRNA, EPB41L4A-AS2, was found downregulated by TGF-β and associated with invasion and metastasis. The relationship of EPB41L4A-AS2 with the clinicopathological features and prognosis of HNSCC patients was evaluated. Bioinformatic analyses revealed that EPB41L4A-AS2 may be involved in processes associated with the tumor-associated signaling pathway, especially the TGF-β signaling pathway. Furthermore, a TGF-β-induced epithelial-to-mesenchymal transition (EMT) model was established. Low EPB41L4A-AS2 expression was determined, and overexpression of this gene inhibited cell migration and invasion in the EMT model. Moreover, EPB41L4A-AS2 suppressed TGFBR1 expression. CONCLUSIONS EPB41L4A-AS2 might serve as a negative regulator of TGF-β signaling and as an effective prognostic biomarker and important target in anti-metastasis therapies of HNSCC patients.
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Ishiguro H, Wakasugi T, Terashita Y, Sakamoto N, Tanaka T, Sagawa H, Okubo T, Takeyama H. Nuclear expression of TCF4/TCF7L2 is correlated with poor prognosis in patients with esophageal squamous cell carcinoma. Cell Mol Biol Lett 2016; 21:5. [PMID: 28536608 PMCID: PMC5415845 DOI: 10.1186/s11658-016-0006-0] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2015] [Accepted: 12/07/2015] [Indexed: 12/21/2022] Open
Abstract
The prognosis for patients with esophageal cancer remains poor. Therefore, the identification of novel target molecules for the treatment of esophageal cancer is necessary. Here, we investigated the clinicopathological significance of transcription factor 4/transcription factor 7-like 2 (TCF4/TCF7L2) in resectable esophageal squamous cell carcinoma (ESCC), because TCF4/TCF7L2 expression has not been studied in esophageal cancer previously. This study included 79 patients with esophageal cancer who underwent surgery between 1998 and 2005. The expression of the TCF4/TCF7L2 protein in the nucleus of esophageal cancer cells was analyzed using immunohistochemistry. We examined the correlation between TCF4/TCF7L2 expression, clinicopathological factors, and prognosis in patients with ESCC. TCF4/TCF7L2 was expressed in 57 % (45/79) of patients. TCF4/TCF7L2 expression was correlated with T factor (T1 vs. T2-4, p = 0.001), stage (I vs. II-IV, p =0.0058), Ly factor (p =0.038), and V factor (p =0.038) and did not correlate with age, gender or N factor. Furthermore, patients who were positive for TCF4/TCF7L2 had a significantly lower survival rate than those who were negative for TCF4/TCF7L2 (log-rank test, p = 0.0040). TCF4/TCF7L2 expression significantly affected the survival of patients with ESCC. Positive expression of TCF4/TCF7L2 was correlated with a poor prognosis after a curative operation in patients with ESCC.
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Affiliation(s)
- Hideyuki Ishiguro
- Department of Gastroenterological Surgery, Nagoya City University Graduate School of Medical Science, 1 Kawasumi, Mizuho-cho, Mizuho-ku, Nagoya, 467-8601 Japan
| | - Takehiro Wakasugi
- Department of Gastroenterological Surgery, Nagoya City University Graduate School of Medical Science, 1 Kawasumi, Mizuho-cho, Mizuho-ku, Nagoya, 467-8601 Japan
| | - Yukio Terashita
- Department of Gastroenterological Surgery, Nagoya City University Graduate School of Medical Science, 1 Kawasumi, Mizuho-cho, Mizuho-ku, Nagoya, 467-8601 Japan
| | - Nobuhiro Sakamoto
- Department of Gastroenterological Surgery, Nagoya City University Graduate School of Medical Science, 1 Kawasumi, Mizuho-cho, Mizuho-ku, Nagoya, 467-8601 Japan
| | - Tatsuya Tanaka
- Department of Gastroenterological Surgery, Nagoya City University Graduate School of Medical Science, 1 Kawasumi, Mizuho-cho, Mizuho-ku, Nagoya, 467-8601 Japan
| | - Hiroyuki Sagawa
- Department of Gastroenterological Surgery, Nagoya City University Graduate School of Medical Science, 1 Kawasumi, Mizuho-cho, Mizuho-ku, Nagoya, 467-8601 Japan
| | - Tomotaka Okubo
- Department of Gastroenterological Surgery, Nagoya City University Graduate School of Medical Science, 1 Kawasumi, Mizuho-cho, Mizuho-ku, Nagoya, 467-8601 Japan
| | - Hiromitsu Takeyama
- Department of Gastroenterological Surgery, Nagoya City University Graduate School of Medical Science, 1 Kawasumi, Mizuho-cho, Mizuho-ku, Nagoya, 467-8601 Japan
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Djakow J, Kramná L, Dušátková L, Uhlík J, Pursiheimo JP, Svobodová T, Pohunek P, Cinek O. An effective combination of sanger and next generation sequencing in diagnostics of primary ciliary dyskinesia. Pediatr Pulmonol 2016; 51:498-509. [PMID: 26228299 DOI: 10.1002/ppul.23261] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/28/2014] [Revised: 06/15/2015] [Accepted: 06/16/2015] [Indexed: 01/07/2023]
Abstract
BACKGROUND Primary ciliary dyskinesia (PCD) is a multigenic autosomal recessive condition affecting respiratory tract and other organs where ciliary motility is required. The extent of its genetic heterogeneity is remarkable. The aim of the study was to develop a cost-effective pipeline for genetic diagnostics using a combination of Sanger and next generation sequencing (NGS). MATERIALS AND METHODS Data and samples of 33 families with 38 affected subjects with PCD diagnosed in childhood were collected over the territory of the Czech Republic. A panel of 18 PCD causative or candidate genes was implemented into an Illumina TruSeq Custom Amplicon NGS assay, and three ancestral mutations in SPAG1 were screened by conventional Sanger sequencing, which was also used for the confirmation of the NGS results and for the analysis of familial segregation. RESULTS The causative gene was DNAH5 in 11/33 (33%) probands, SPAG1 in 8/33 (24%), and DNAI1, CCDC40, LRRC6 in one family each. If the high proportion of subjects with bi-allelic ancestral mutations in SPAG1 is corroborated in other Caucasian populations, a simple Sanger sequencing test for these three mutations may serve as an effective pre-screening step, being followed by an NGS panel for other, much larger, PCD genes. CONCLUSIONS We present a combination of Sanger sequencing with an NGS panel for known and candidate PCD genes, implemented in a moderate-size national collection of patients. This strategy has proven to be cost-effective, rapid and reliable, and was able to detect the causative gene in two thirds of our PCD patients.
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Affiliation(s)
- Jana Djakow
- Department of Paediatrics, 2nd Faculty of Medicine, Charles University in Prague and Motol University Hospital, Czech Republic
| | - Lenka Kramná
- Department of Paediatrics, 2nd Faculty of Medicine, Charles University in Prague and Motol University Hospital, Czech Republic
| | - Lenka Dušátková
- Department of Paediatrics, 2nd Faculty of Medicine, Charles University in Prague and Motol University Hospital, Czech Republic
| | - Jiří Uhlík
- Department of Histology and Embryology, 2nd Faculty of Medicine, Charles University in Prague, Czech Republic
| | - Juha-Pekka Pursiheimo
- Department of Medical Biochemistry and Genetics, University of Turku, Turku, Finland
| | - Tamara Svobodová
- Department of Paediatrics, 2nd Faculty of Medicine, Charles University in Prague and Motol University Hospital, Czech Republic
| | - Petr Pohunek
- Department of Paediatrics, 2nd Faculty of Medicine, Charles University in Prague and Motol University Hospital, Czech Republic
| | - Ondřej Cinek
- Department of Paediatrics, 2nd Faculty of Medicine, Charles University in Prague and Motol University Hospital, Czech Republic
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Deng F, Zhou K, Cui W, Liu D, Ma Y. Clinicopathological significance of wnt/β-catenin signaling pathway in esophageal squamous cell carcinoma. INTERNATIONAL JOURNAL OF CLINICAL AND EXPERIMENTAL PATHOLOGY 2015; 8:3045-3053. [PMID: 26045816 PMCID: PMC4440125] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Received: 01/04/2015] [Accepted: 02/26/2015] [Indexed: 06/04/2023]
Abstract
BACKGROUND/AIM Esophageal squamous cell carcinoma (ESCC) is one of the most common malignant tumors. It has been reported that Wnt signaling pathway plays an important role in Esophageal Cancer progression, metastasis and invasion. However the clinicopathological significance of Wnt2, GSK3β, and β-catenin in ESCC has been little reported. In the present study, the aim of this study was to investigate the clinicopathologic and prognosis roles of Wnt2, GSK3β, and β-catenin in ESCC tissue. METHODS 265 ESCC samples were analyzed by immunohistochemistry using Wnt2, GSK3β, and β-catenin antibodies. Then, correlation of Wnt2, GSK3β, and β-catenin expression with clinicopathological features and prognosis of ESCC patients was statistically analyzed. RESULTS Cytoplasmic Wnt2 overexpression was detected in 55.5% (147 of 265) ESCCs, which was significantly correlated with the degree of differentiation (P=0.031). Cytoplasmic GSK3β overexpression was detected in 7.2% (19 of 265) ESCCs, and aberrant β-catenin expression was identified in 54.3% (144 of 265) of ESCCs. The positive rate of Wnt2 significantly increased with the malignant degree of Kazak ESCC patients. The aberrant β-catenin expression in GSK3β-negative ESCC was significantly associated with the ethnic, tumor size, tumor location, degree of differentiation, AJCC stage, lymph node status. Furthermore, the expression of β-catenin implicated the ethnic difference (P=0.019). In Kaplan-Meier curve analysis, no significant correlation was observed between the expression of Wnt2, GSK3β, β-catenin and the poor prognosis of ESCCs. CONCLUSION The aberrant β-catenin expression could be an adverse underlying factor in carcinogenesis and progression of ESCC. There was a different statistical signification for β-catenin in Kazakhs to compare with Hans.
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Affiliation(s)
- Feiyan Deng
- Department of Pathology, First Affiliated Hospital, Xinjiang Medical UniversityUrumqi 830054, China
| | - Keming Zhou
- Hypertension Center of The People’s Hospital of Xinjiang Uygur Autonomous Region, Hypertension Institute of Xinjiang Uygur Autonomous RegionUrumuqi 830001, Xinjiang, China
| | - Wenli Cui
- Department of Pathology, First Affiliated Hospital, Xinjiang Medical UniversityUrumqi 830054, China
| | - Dong Liu
- Department of Pathology, First Affiliated Hospital, Xinjiang Medical UniversityUrumqi 830054, China
| | - Yuqing Ma
- Department of Pathology, First Affiliated Hospital, Xinjiang Medical UniversityUrumqi 830054, China
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Yamaguchi T, Koizumi K, Arai M, Tamura K, Iijima T, Horiguchi SI, Miyaki M. A large deletion of chromosome 5q22.1-22.2 associated with sparse type of familial adenomatous polyposis: report of a case. Jpn J Clin Oncol 2014; 44:1243-7. [PMID: 25324480 DOI: 10.1093/jjco/hyu150] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
The proband was a 32-year-old man with sparse type of familial adenomatous polyposis with fundic gland and duodenal polyps and congenital hypertrophy of the retinal pigment epithelium without osteoma, dental abnormalities and desmoid tumors. Direct DNA sequencing did not detect germline mutations in any APC exon. However, using the multiplex ligation-dependent probe amplification method, we detected germline deletions of all APC exons. Using dual-color fluorescence in situ hybridization, we identified germline deletion of locus 5q22.1-22.2 that includes APC. Analysis of colorectal tumors identified somatic APC mutations in the cluster region in all polyps, but no loss of heterozygosity was detected in any polyp.
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Affiliation(s)
- Tatsuro Yamaguchi
- Hereditary Tumor Research Project, Tokyo Metropolitan Cancer and Infectious Diseases Center, Komagome Hospital, Tokyo Department of Surgery, Tokyo Metropolitan Cancer and Infectious Diseases Center, Komagome Hospital, Tokyo
| | - Koichi Koizumi
- Department of Gastroenterology, Tokyo Metropolitan Cancer and Infectious Diseases Center, Komagome Hospital, Tokyo
| | - Masami Arai
- Clinical Genetic Oncology, Cancer Institute Hospital of Japanese Foundation for Cancer Research, Tokyo
| | - Kazuo Tamura
- Major in Science, Graduate School of Science and Engineering Research, Kinki University, Higashiosaka
| | - Takeru Iijima
- Hereditary Tumor Research Project, Tokyo Metropolitan Cancer and Infectious Diseases Center, Komagome Hospital, Tokyo
| | - Shin-Ichiro Horiguchi
- Department of Pathology, Tokyo Metropolitan Cancer and Infectious Diseases Center, Komagome Hospital, Tokyo, Japan
| | - Michiko Miyaki
- Hereditary Tumor Research Project, Tokyo Metropolitan Cancer and Infectious Diseases Center, Komagome Hospital, Tokyo
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Guo Y, Christine KS, Conlon F, Gessert S, Kühl M. Expression analysis of epb41l4a during Xenopus laevis embryogenesis. Dev Genes Evol 2011; 221:113-9. [PMID: 21556855 DOI: 10.1007/s00427-011-0362-8] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2011] [Accepted: 03/30/2011] [Indexed: 01/04/2023]
Abstract
Epbl41l4a (erythrocyte protein band 4.1-like 4a, also named Nbl4) is a member of the band 4.1/Nbl4 (novel band 4.1-like protein 4) group of the FERM (4.1, ezrin, radixin, moesin) protein superfamily. Proteins encoded by this gene family are involved in many cellular processes such as organization of epithelial cells and signal transduction. On a molecular level, band 4.1/Nbl4 proteins have been shown to link membrane-associated proteins and lipids to the actin cytoskeleton. Epbl41l4a has also recently been identified as a target gene of the Wnt/β-catenin pathway. Here, we describe for the first time the spatio-temporal expression of epbl41l4a using Xenopus laevis as a model system. We observed a strong and specific expression of epb41l4a in the developing somites, in particular during segmentation as well as in the nasal and cranial placodes, pronephros, and neural tube. Thus, epbl41l4a is expressed in tissues undergoing morphogenetic movements, suggesting a functional role of epbl41l4a during these processes.
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Affiliation(s)
- Yanchun Guo
- Institute for Biochemistry and Molecular Biology, Ulm University, Ulm, Germany
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16
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Ellender M, Harrison JD, Meijne E, Huiskamp R, Kozlowski RE, Haines JW, Edwards AA, Ainsbury EA, Moody JC, Bouffler SD, Cox R. Intestinal tumours induced in Apc(Min/+) mice by X-rays and neutrons. Int J Radiat Biol 2011; 87:385-99. [PMID: 21219111 DOI: 10.3109/09553002.2011.542542] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
PURPOSE To compare the development of intestinal adenomas following neutron and X-ray exposure of Apc(Min/+) mice (Apc - adenomatous polyposis coli; Min - multiple intestinal neoplasia). MATERIALS AND METHODS Adult mice were exposed to acute doses of X-rays or fission neutrons. Tumour counting was undertaken 200 days later and samples were taken for Loss of Heterozygosity (LOH) analysis. RESULTS Tumour numbers (adenomas and microadenomas) increased by 1.4-fold, 1.7-fold, 2.7-fold and 9-fold, after 0.5, 1, 2 and 5 Gy X-rays, respectively, and by 2.4-fold and 5.7-fold, after 0.5 and 1 Gy fission neutrons, respectively. LOH analysis of tumours from neutron-exposed mice showed that 63% had lost Apc and 90% (cf. 53% in controls) had lost D18mit84, a marker for Epb4.1l4a/NBL4 (erythrocyte protein band 4.1-like 4a/novel band 4.1-like 4), known to be involved in the Wnt (wingless-related mouse mammary tumour virus integration site) pathway. Some tumours from neutron-exposed mice appeared to have homozygous loss of some chromosomal markers. CONCLUSIONS X-ray or fission neutron irradiation results in strongly enhanced tumour multiplicities. Comparison of tumour yields indicated a low Relative Biological Effectiveness of around 2-8 for fission neutrons compared with X-rays. LOH in intestinal tumours from neutron-exposed mice appeared to be more complex than previously reported for tumours from X-irradiated mice.
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Affiliation(s)
- Michele Ellender
- Health Protection Agency, Centre for Radiation, Chemical and Environmental Hazards, Chilton, Didcot, Oxfordshire, UK.
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Kim MS, Chang X, LeBron C, Nagpal JK, Lee J, Huang Y, Yamashita K, Trink B, Ratovitski EA, Sidransky D. Neurofilament heavy polypeptide regulates the Akt-beta-catenin pathway in human esophageal squamous cell carcinoma. PLoS One 2010; 5:e9003. [PMID: 20140245 PMCID: PMC2815775 DOI: 10.1371/journal.pone.0009003] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2009] [Accepted: 12/31/2009] [Indexed: 11/18/2022] Open
Abstract
Aerobic glycolysis and mitochondrial dysfunction are common features of aggressive cancer growth. We observed promoter methylation and loss of expression in neurofilament heavy polypeptide (NEFH) in a significant proportion of primary esophageal squamous cell carcinoma (ESCC) samples that were of a high tumor grade and advanced stage. RNA interference-mediated knockdown of NEFH accelerated ESCC cell growth in culture and increased tumorigenicity in vivo, whereas forced expression of NEFH significantly inhibited cell growth and colony formation. Loss of NEFH caused up-regulation of pyruvate kinase-M2 type and down-regulation of pyruvate dehydrogenase, via activation of the Akt/beta-catenin pathway, resulting in enhanced aerobic glycolysis and mitochondrial dysfunction. The acceleration of glycolysis and mitochondrial dysfunction in NEFH-knockdown cells was suppressed in the absence of beta-catenin expression, and was decreased by the treatment of 2-Deoxyglucose, a glycolytic inhibitor, or API-2, an Akt inhibitor. Loss of NEFH activates the Akt/beta-catenin pathway and increases glycolysis and mitochondrial dysfunction. Cancer cells with methylated NEFH can be targeted for destruction with specific inhibitors of deregulated downstream pathways.
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Affiliation(s)
- Myoung Sook Kim
- Head and Neck Cancer Research Division, Department of Otolaryngology, The Johns Hopkins University School of Medicine, Baltimore, Maryland, United States of America
| | - Xiaofei Chang
- Head and Neck Cancer Research Division, Department of Otolaryngology, The Johns Hopkins University School of Medicine, Baltimore, Maryland, United States of America
| | - Cynthia LeBron
- Head and Neck Cancer Research Division, Department of Otolaryngology, The Johns Hopkins University School of Medicine, Baltimore, Maryland, United States of America
| | - Jatin K. Nagpal
- Head and Neck Cancer Research Division, Department of Otolaryngology, The Johns Hopkins University School of Medicine, Baltimore, Maryland, United States of America
| | - Juna Lee
- Head and Neck Cancer Research Division, Department of Otolaryngology, The Johns Hopkins University School of Medicine, Baltimore, Maryland, United States of America
| | - Yiping Huang
- Department of Dermatology, The Johns Hopkins University School of Medicine, Baltimore, Maryland, United States of America
| | - Keishi Yamashita
- Department of Surgery, Kitasato University Hospital, Sagamihara, Kanagawa, Japan
| | - Barry Trink
- Head and Neck Cancer Research Division, Department of Otolaryngology, The Johns Hopkins University School of Medicine, Baltimore, Maryland, United States of America
| | - Edward A. Ratovitski
- Department of Dermatology, The Johns Hopkins University School of Medicine, Baltimore, Maryland, United States of America
| | - David Sidransky
- Head and Neck Cancer Research Division, Department of Otolaryngology, The Johns Hopkins University School of Medicine, Baltimore, Maryland, United States of America
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Rozenchan PB, Carraro DM, Brentani H, de Carvalho Mota LD, Bastos EP, e Ferreira EN, Torres CH, Katayama MLH, Roela RA, Lyra EC, Soares FA, Folgueira MAAK, Góes JCGS, Brentani MM. Reciprocal changes in gene expression profiles of cocultured breast epithelial cells and primary fibroblasts. Int J Cancer 2009; 125:2767-77. [PMID: 19530251 DOI: 10.1002/ijc.24646] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
The importance of epithelial-stroma interaction in normal breast development and tumor progression has been recognized. To identify genes that were regulated by these reciprocal interactions, we cocultured a nonmalignant (MCF10A) and a breast cancer derived (MDA-MB231) basal cell lines, with fibroblasts isolated from breast benign-disease adjacent tissues (NAF) or with carcinoma-associated fibroblasts (CAF), in a transwell system. Gene expression profiles of each coculture pair were compared with the correspondent monocultures, using a customized microarray. Contrariwise to large alterations in epithelial cells genomic profiles, fibroblasts were less affected. In MDA-MB231 highly represented genes downregulated by CAF derived factors coded for proteins important for the specificity of vectorial transport between ER and golgi, possibly affecting cell polarity whereas the response of MCF10A comprised an induction of genes coding for stress responsive proteins, representing a prosurvival effect. While NAF downregulated genes encoding proteins associated to glycolipid and fatty acid biosynthesis in MDA-MB231, potentially affecting membrane biogenesis, in MCF10A, genes critical for growth control and adhesion were altered. NAFs responded to coculture with MDA-MB231 by a decrease in the expression of genes induced by TGFbeta1 and associated to motility. However, there was little change in NAFs gene expression profile influenced by MCF10A. CAFs responded to the presence of both epithelial cells inducing genes implicated in cell proliferation. Our data indicate that interactions between breast fibroblasts and basal epithelial cells resulted in alterations in the genomic profiles of both cell types which may help to clarify some aspects of this heterotypic signaling.
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Affiliation(s)
- Patricia Bortman Rozenchan
- Disciplina de Oncologia, Departamento de Radiologia, Faculdade de Medicina da Universidade de São Paulo, Hospital A.C. Camargo, Av. Dr. Arnaldo, 455, Sala 4112, São Paulo, SP CEP 01246-903, Brazil
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Pang KC, Dinger ME, Mercer TR, Malquori L, Grimmond SM, Chen W, Mattick JS. Genome-wide identification of long noncoding RNAs in CD8+ T cells. THE JOURNAL OF IMMUNOLOGY 2009; 182:7738-48. [PMID: 19494298 DOI: 10.4049/jimmunol.0900603] [Citation(s) in RCA: 185] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Previous research into the molecular mechanisms that underlie Ag-specific CD8(+) T cell differentiation and function has largely focused on the role of proteins. However, it is now apparent that the mammalian genome expresses large numbers of long (>200 nt) nonprotein-coding RNAs (ncRNAs), and there is increasing evidence that these RNAs have important regulatory functions, particularly in the regulation of epigenetic processes underpinning cell differentiation. In this study, we show that CD8(+) T cells express hundreds of long ncRNAs, many of which are lymphoid-specific and/or change dynamically with lymphocyte differentiation or activation. Numerous ncRNAs surround or overlap immunologically important protein-coding genes and can be predicted to function via a range of regulatory mechanisms. The overlap of many long ncRNAs expressed in CD8(+) T cells with microRNAs and small interfering RNAs further suggests that long ncRNAs may be processed into and exert their effects via smaller functional species. Finally, we show that the majority of long ncRNAs expressed in CD8(+) T cells harbor signatures of evolutionary conservation, secondary structures, and/or regulated promoters, further supporting their functionality. Taken together, our findings represent the first systematic discovery of long ncRNAs expressed in CD8(+) T cells and suggest that many of these transcripts are likely to play a role in adaptive immunity.
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Affiliation(s)
- Ken C Pang
- Australian Research Council Special Research Centre for Functional and Applied Genomics, Institute for Molecular Bioscience, University of Queensland, Brisbane, Australia
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Donner J, Pirkola S, Silander K, Kananen L, Terwilliger JD, Lönnqvist J, Peltonen L, Hovatta I. An association analysis of murine anxiety genes in humans implicates novel candidate genes for anxiety disorders. Biol Psychiatry 2008; 64:672-680. [PMID: 18639233 PMCID: PMC2682432 DOI: 10.1016/j.biopsych.2008.06.002] [Citation(s) in RCA: 48] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/09/2008] [Revised: 05/19/2008] [Accepted: 06/02/2008] [Indexed: 01/19/2023]
Abstract
BACKGROUND Human anxiety disorders are complex diseases with largely unknown etiology. We have taken a cross-species approach to identify genes that regulate anxiety-like behavior with inbred mouse strains that differ in their innate anxiety levels as a model. We previously identified 17 genes with expression levels that correlate with anxiety behavior across the studied strains. In the present study, we tested their 13 known human homologues as candidate genes for human anxiety disorders with a genetic association study. METHODS We describe an anxiety disorder study sample derived from a Finnish population-based cohort and consisting of 321 patients and 653 carefully matched control subjects, all interviewed to obtain DSM-IV diagnoses. We genotyped altogether 208 single nucleotide polymorphisms (SNPs) (all non-synonymous SNPs, SNPs that alter potential microRNA binding sites, and gap-filling SNPs selected on the basis of HapMap information) from the investigated anxiety candidate genes. RESULTS Specific alleles and haplotypes of six of the examined genes revealed some evidence for association (p < or = .01). The most significant evidence for association with different anxiety disorder subtypes were: p = .0009 with ALAD (delta-aminolevulinate dehydratase) in social phobia, p = .009 with DYNLL2 (dynein light chain 2) in generalized anxiety disorder, and p = .004 with PSAP (prosaposin) in panic disorder. CONCLUSIONS Our findings suggest that variants in these genes might predispose to specific human anxiety disorders. These results illustrate the potential utility of cross-species approaches in identification of candidate genes for psychiatric disorders.
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Affiliation(s)
- Jonas Donner
- Research Program of Molecular Neurology, Biomedicum Helsinki, Finland; Department of Medical Genetics, University of Helsinki, Helsinki, Finland; Department of Molecular Medicine, National Public Health Institute and FIMM, Institute of Molecular Medicine Finland, Helsinki, Finland
| | - Sami Pirkola
- Department of Mental Health and Alcohol Research, National Public Health Institute, Helsinki, Finland; Department of Psychiatry, Helsinki University Central Hospital, Helsinki, Finland
| | - Kaisa Silander
- Department of Molecular Medicine, National Public Health Institute and FIMM, Institute of Molecular Medicine Finland, Helsinki, Finland
| | - Laura Kananen
- Research Program of Molecular Neurology, Biomedicum Helsinki, Finland; Department of Medical Genetics, University of Helsinki, Helsinki, Finland; Department of Molecular Medicine, National Public Health Institute and FIMM, Institute of Molecular Medicine Finland, Helsinki, Finland
| | - Joseph D Terwilliger
- Faculty of Medicine, University of Helsinki, Helsinki, Finland; Department of Genetics and Development, Department of Psychiatry, Columbia Genome Center, Columbia University, New York, New York; Division of Medical Genetics, New York State Psychiatric Institute, New York, New York
| | - Jouko Lönnqvist
- Department of Mental Health and Alcohol Research, National Public Health Institute, Helsinki, Finland; Department of Psychiatry, Helsinki University Central Hospital, Helsinki, Finland
| | - Leena Peltonen
- Department of Medical Genetics, University of Helsinki, Helsinki, Finland; Department of Molecular Medicine, National Public Health Institute and FIMM, Institute of Molecular Medicine Finland, Helsinki, Finland; The Broad Institute of MIT and Harvard, Cambridge, Massachusetts; Wellcome Trust Sanger Institute, Hinxton, Cambridge, United Kingdom
| | - Iiris Hovatta
- Research Program of Molecular Neurology, Biomedicum Helsinki, Finland; Department of Medical Genetics, University of Helsinki, Helsinki, Finland; Department of Molecular Medicine, National Public Health Institute and FIMM, Institute of Molecular Medicine Finland, Helsinki, Finland; Department of Mental Health and Alcohol Research, National Public Health Institute, Helsinki, Finland.
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Moesin signalling induces F9 teratocarcinoma cells to differentiate into primitive extraembryonic endoderm. Cell Signal 2008; 20:163-75. [DOI: 10.1016/j.cellsig.2007.10.011] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2007] [Revised: 08/24/2007] [Accepted: 10/03/2007] [Indexed: 11/18/2022]
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Bruce SJ, Gardiner BB, Burke LJ, Gongora MM, Grimmond SM, Perkins AC. Dynamic transcription programs during ES cell differentiation towards mesoderm in serum versus serum-freeBMP4 culture. BMC Genomics 2007; 8:365. [PMID: 17925037 PMCID: PMC2204012 DOI: 10.1186/1471-2164-8-365] [Citation(s) in RCA: 57] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2007] [Accepted: 10/10/2007] [Indexed: 12/30/2022] Open
Abstract
Background Expression profiling of embryonic stem (ES) cell differentiation in the presence of serum has been performed previously. It remains unclear if transcriptional activation is dependent on complex growth factor mixtures in serum or whether this process is intrinsic to ES cells once the stem cell program has been inactivated. The aims of this study were to determine the transcriptional programs associated with the stem cell state and to characterize mesoderm differentiation between serum and serum-free culture. Results ES cells were differentiated as embryoid bodies in 10% FBS or serum-free media containing BMP4 (2 ng/ml), and expression profiled using 47 K Illumina(R) Sentrix arrays. Statistical methods were employed to define gene sets characteristic of stem cell, epiblast and primitive streak programs. Although the initial differentiation profile was similar between the two culture conditions, cardiac gene expression was inhibited in serum whereas blood gene expression was enhanced. Also, expression of many members of the Kruppel-like factor (KLF) family of transcription factors changed dramatically during the first few days of differentiation. KLF2 and KLF4 co-localized with OCT4 in a sub-nuclear compartment of ES cells, dynamic changes in KLF-DNA binding activities occurred upon differentiation, and strong bio-informatic evidence for direct regulation of many stem cell genes by KLFs was found. Conclusion Down regulation of stem cell genes and activation of epiblast/primitive streak genes is similar in serum and defined media, but subsequent mesoderm differentiation is strongly influenced by the composition of the media. In addition, KLF family members are likely to be important regulators of many stem cell genes.
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Affiliation(s)
- Stephen J Bruce
- Institute for Molecular Bioscience, University of Queensland, Brisbane, Queensland, Australia.
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Kudo J, Nishiwaki T, Haruki N, Ishiguro H, Shibata Y, Terashita Y, Sugiura H, Shinoda N, Kimura M, Kuwabara Y, Fujii Y. Aberrant nuclear localization of beta-catenin without genetic alterations in beta-catenin or Axin genes in esophageal cancer. World J Surg Oncol 2007; 5:21. [PMID: 17309796 PMCID: PMC1808060 DOI: 10.1186/1477-7819-5-21] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2006] [Accepted: 02/19/2007] [Indexed: 11/11/2022] Open
Abstract
Background β-catenin is a multifunctional protein involved in two apparently independent processes: cell-cell adhesion and signal transduction. β-catenin is involved in Wnt signaling pathway that regulates cellular differentiation and proliferation. In this study, we investigated the expression pattern of β-catenin and cyclin D1 using immunohistochemistry and searched for mutations in exon 3 of the β-catenin gene and Axin gene in esophageal squamous cell carcinoma. Materials and methods Samples were obtained from 50 esophageal cancer patients. Immunohistochemical staining for β-catenin and cyclin D1 was done. Mutational analyses of the exon3 of the β-catenin gene and Axin gene were performed on tumors with nuclear β-catenin expression. Results Four (8%) esophageal cancer tissues showed high nuclear β-catenin staining. Overexpression of cyclin D1 was observed in 27 out of 50 (54%) patients. All four cases that showed nuclear β-catenin staining overexpressed cyclin D1. No relationship was observed between the expression pattern of β-catenin and cyclin D1 and age, sex, tumor size, stage, differentiation grade, lymph node metastasis, response to chemotherapy, or survival. No mutational change was found in β-catenin exon 3 in the four cases with nuclear β-catenin staining. Sequencing analysis of the Axin cDNA revealed only a splicing variant (108 bp deletion, position 2302–2409) which was present in the paired normal mucosa. Conclusion A fraction of esophageal squamous cell carcinomas have abnormal nuclear accumulation of β-catenin accompanied with increased cyclin D1 expression. Mutations in β-catenin or axin genes are not responsible for this abnormal localization of β-catenin.
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Affiliation(s)
- Junzo Kudo
- Department of Surgery II, Nagoya City University Medical School, Nagoya, Japan
| | - Tadashi Nishiwaki
- Department of Surgery II, Nagoya City University Medical School, Nagoya, Japan
| | - Nobuhiro Haruki
- Department of Surgery II, Nagoya City University Medical School, Nagoya, Japan
| | - Hideyuki Ishiguro
- Department of Surgery II, Nagoya City University Medical School, Nagoya, Japan
| | - Yasuyuki Shibata
- Department of Surgery II, Nagoya City University Medical School, Nagoya, Japan
| | - Yukio Terashita
- Department of Surgery II, Nagoya City University Medical School, Nagoya, Japan
| | - Hironori Sugiura
- Department of Surgery II, Nagoya City University Medical School, Nagoya, Japan
| | - Noriyuki Shinoda
- Department of Surgery II, Nagoya City University Medical School, Nagoya, Japan
| | - Masahiro Kimura
- Department of Surgery II, Nagoya City University Medical School, Nagoya, Japan
| | - Yoshiyuki Kuwabara
- Department of Surgery II, Nagoya City University Medical School, Nagoya, Japan
| | - Yoshitaka Fujii
- Department of Surgery II, Nagoya City University Medical School, Nagoya, Japan
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Knowlton MN, Chan BMC, Kelly GM. The zebrafish band 4.1 member Mir is involved in cell movements associated with gastrulation. Dev Biol 2003; 264:407-29. [PMID: 14651927 DOI: 10.1016/j.ydbio.2003.09.001] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
Cellular processes rely on dynamic events occurring between the cortical cytoskeleton and plasma membrane. Members of the Band 4.1 superfamily, which are best known for their ability to tether the cytoskeleton to the plasma membrane, play prominent structural and regulatory roles that influence cell-cell and cell-substrate interactions, endo- and exocytosis, cell polarity, migration, proliferation, and differentiation. We have identified a new member of the zebrafish Band 4.1 superfamily, which is the homolog of human myosin regulatory light chain interacting protein (MIR), and have examined its role in embryonic development. Zebrafish Mir contains the conserved amino-terminal plasma membrane-binding FERM (Band 4.1/ezrin/radixin/moesin) domain as well as other putative protein-protein interacting domains, including a RING finger. Overall, zebrafish Mir is 71% identical to human MIR located at chromosome 6p23-p22.3, and maps on linkage group 19 to a region of synteny with human chromosome 6. In situ hybridization and RT-PCR revealed that mir is expressed maternally and ubiquitously throughout development. Blocking Mir translation using a mir-specific, morpholino-based, knock-down strategy or expressing Mir constructs lacking the RING finger domain disrupts gastrulation and leads to subsequent trunk and tail defects. In severe cases, morphants exogastrulate. The synergistic effect seen when two mir-specific morpholinos are used in conjunction reflects the specific knock-down of mir. In addition, morphant phenotypes induced by mir-specific morpholinos are rescued by overexpression of the full-length Mir. In situ hybridization analysis with mesodermal- and neural-specific markers shows that morphants exhibit a delay in cell movements associated with gastrulation, epiboly, convergence, and extension. A yeast two-hybrid analysis was performed to identify binding partners that may participate with Mir during gastrulation, and Annexin V, a calcium channel protein, was isolated. At early developmental stages, annexin V transcripts colocalize with mir, but after gastrulation, annexin V mRNA becomes localized to the distal tail region and an area in the olfactory placode. At the protein level, Mir colocalizes with Annexin V when expressed in COS cells. Together, these results indicate that Mir is essential for embryonic development and that its role in early embryonic development likely involves calcium-dependent mechanisms essential during the extensive cell movements associated with gastrulation.
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Affiliation(s)
- Michelle N Knowlton
- Department of Biology, Molecular Genetics Unit, University of Western Ontario, London, ON, Canada N6A 5B7
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Ishiguro H, Shimokawa T, Tsunoda T, Tanaka T, Fujii Y, Nakamura Y, Furukawa Y. Isolation of HELAD1, a novel human helicase gene up-regulated in colorectal carcinomas. Oncogene 2002; 21:6387-94. [PMID: 12214280 DOI: 10.1038/sj.onc.1205751] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2002] [Revised: 05/17/2002] [Accepted: 06/07/2002] [Indexed: 01/18/2023]
Abstract
To investigate the mechanisms of colorectal carcinogenesis, we searched for genes regulated by adenomatous polyposis coli gene product (APC) and identified a novel gene, termed HELAD1 (helicase, APC down-regulated 1). A recombinant polypeptide representing the ATPases associated with cellular activities (AAA) domain of the HELAD1 product showed 3' to 5' helicase activity and exonuclease activity in vitro. HELAD1 was abundantly expressed in 16 of 20 colon cancers examined but hardly detectable in corresponding non-cancerous mucosae. Treatment of colon-cancer cells with antisense oligonucleotides suppressed its expression and induced apoptosis. These data revealed an importance of HELAD1 in colorectal carcinogenesis and suggest that suppression of HELAD1 may be a promising therapeutic strategy.
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Affiliation(s)
- Hideyuki Ishiguro
- Laboratory of Molecular Medicine, Human Genome Center, Institute of Medical Science, The University of Tokyo, 4-6-1 Shirokanedai, Minato-ku Tokyo 108-8639, Japan
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26
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Ishiguro H, Tsunoda T, Tanaka T, Fujii Y, Nakamura Y, Furukawa Y. Identification of AXUD1, a novel human gene induced by AXIN1 and its reduced expression in human carcinomas of the lung, liver, colon and kidney. Oncogene 2001; 20:5062-6. [PMID: 11526492 DOI: 10.1038/sj.onc.1204603] [Citation(s) in RCA: 54] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2001] [Revised: 04/05/2001] [Accepted: 04/05/2001] [Indexed: 11/09/2022]
Abstract
Axin, an important regulator of beta-catenin, is frequently mutated in human hepatocellular carcinomas (HCCs), and transduction of the wild-type Axin gene (AXIN1) induces apoptosis in HCC cells as well as in colon cancer cells. To investigate the detailed biological function of Axin, we searched on a cDNA microarray for genes whose expression was altered by transfer of wild-type AXIN1 into colon-cancer cell line LoVo. Among the genes showing altered expression, we focused on one, termed AXUD1 (AXIN1 up-regulated), that revealed enhanced expression in response to exogenously expressed AXIN1 but not to LacZ, a control gene. The AXUD1 gene consists of five exons and encodes a transcript with an open reading frame of 1767 bp. A 3.2-kb transcript of AXUD1 was expressed in all human tissues examined, most abundantly in lung, placenta, skeletal muscle, pancreas and leukocyte. By radiation-hybrid mapping we assigned its chromosomal location at 3p22, a region where frequent loss of heterozygosity has been reported in lung, renal, prostate, breast and cervical cancers. AXUD1 was frequently down-regulated in lung, kidney, liver and colon cancers compared with their corresponding normal tissues, suggesting that AXUD1 may have a tumor-suppressor function in those organs.
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Affiliation(s)
- H Ishiguro
- Laboratory of Molecular Medicine, Human Genome Center, Institute of Medical Science, The University of Tokyo, 4-6-1 Shirokanedai, Minato-ku, Tokyo 108-8639, Japan
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Kato T, Satoh S, Okabe H, Kitahara O, Ono K, Kihara C, Tanaka T, Tsunoda T, Yamaoka Y, Nakamura Y, Furukawa Y. Isolation of a novel human gene, MARKL1, homologous to MARK3 and its involvement in hepatocellular carcinogenesis. Neoplasia 2001; 3:4-9. [PMID: 11326310 PMCID: PMC1505019 DOI: 10.1038/sj.neo.7900132] [Citation(s) in RCA: 76] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2000] [Indexed: 11/08/2022] Open
Abstract
Activation of the Wnt-signaling pathway is known to play a crucial role in carcinogenesis of various human organs including the colon, liver, prostate, and endometrium. To investigate the mechanisms underlying hepatocellular carcinogenesis, we attempted to identify genes regulated by beta-catenin/Tcf complex in a human hepatoma cell line, HepG2, in which an activated form of beta-catenin is expressed. By means of cDNA microarray, we isolated a novel human gene, termed MARKL1 (MAP/microtubule affinity-regulating kinase-like 1), whose expression was downregulated in response to decreased Tcf/LEF1 activity. The transcript expressed in liver consisted of 3529 nucleotides that contained an open reading frame of 2256 nucleotides, encoding 752 amino acids homologous to human MARK3 (MAP/microtubule affinity-regulating kinase 3). Expression levels of MARKL1 were markedly elevated in eight of nine HCCs in which nuclear accumulation of beta-catenin were observed, which may suggest that MARKL1 plays some role in hepatocellular carcinogenesis.
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Affiliation(s)
- Tatsushi Kato
- Laboratory of Molecular Medicine, Human Genome Center, Institute of Medical Science, The University of Tokyo, Tokyo, Japan
- Department of Gastroenterological Surgery, Kyoto University Graduate School of Medicine, Kyoto, Japan
| | - Seiji Satoh
- Laboratory of Molecular Medicine, Human Genome Center, Institute of Medical Science, The University of Tokyo, Tokyo, Japan
- Department of Gastroenterological Surgery, Kyoto University Graduate School of Medicine, Kyoto, Japan
| | - Hiroshi Okabe
- Laboratory of Molecular Medicine, Human Genome Center, Institute of Medical Science, The University of Tokyo, Tokyo, Japan
- Department of Gastroenterological Surgery, Kyoto University Graduate School of Medicine, Kyoto, Japan
| | - Osamu Kitahara
- Laboratory of Molecular Medicine, Human Genome Center, Institute of Medical Science, The University of Tokyo, Tokyo, Japan
| | - Kenji Ono
- Laboratory of Molecular Medicine, Human Genome Center, Institute of Medical Science, The University of Tokyo, Tokyo, Japan
| | - Chikashi Kihara
- Laboratory of Molecular Medicine, Human Genome Center, Institute of Medical Science, The University of Tokyo, Tokyo, Japan
| | - Toshihiro Tanaka
- Laboratory of Molecular Medicine, Human Genome Center, Institute of Medical Science, The University of Tokyo, Tokyo, Japan
| | - Tatsuhiko Tsunoda
- SNP Research Center, RIKEN (Institute of Physical and Chemical Research), Tokyo, Japan
| | - Yoshio Yamaoka
- Department of Gastroenterological Surgery, Kyoto University Graduate School of Medicine, Kyoto, Japan
| | - Yusuke Nakamura
- Laboratory of Molecular Medicine, Human Genome Center, Institute of Medical Science, The University of Tokyo, Tokyo, Japan
| | - Yoichi Furukawa
- Laboratory of Molecular Medicine, Human Genome Center, Institute of Medical Science, The University of Tokyo, Tokyo, Japan
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