1
|
Yanowski E, Yacovzada NS, David E, Giladi A, Jaitin D, Farack L, Egozi A, Ben-Zvi D, Itzkovitz S, Amit I, Hornstein E. Physically interacting beta-delta pairs in the regenerating pancreas revealed by single-cell sequencing. Mol Metab 2022; 60:101467. [PMID: 35240340 PMCID: PMC8983436 DOI: 10.1016/j.molmet.2022.101467] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/24/2021] [Revised: 02/05/2022] [Accepted: 02/25/2022] [Indexed: 11/12/2022] Open
Abstract
Objectives Until recently, communication between neighboring cells in islets of Langerhans was overlooked by genomic technologies, which require rigorous tissue dissociation into single cells. Methods We utilize sorting of physically interacting cells (PICs) with single-cell RNA-sequencing to systematically map cellular interactions in the endocrine pancreas after pancreatectomy. Results The pancreas cellular landscape features pancreatectomy associated heterogeneity of beta-cells, including an interaction-specific program between paired beta and delta-cells. Conclusions Our analysis suggests that the particular cluster of beta-cells that pairs with delta-cells benefits from stress protection, implying that the interaction between beta- and delta-cells might safeguard against pancreatectomy associated challenges. The work encourages testing the potential relevance of physically-interacting beta-delta-cells also in diabetes mellitus. Single-cell RNA-sequencing systematically maps physically interacting endocrine cells in the pancreas. The landscape of pancreatectomy associated beta-cell heterogeneity is mapped in a single cell resolution. Interaction-specific beta - delta cellular program safeguards beta cells against pancreatectomy-associated stress. Physically interacting beta delta pairs were discovered in an injury model and may also be relevant in diabetes.
Collapse
Affiliation(s)
- Eran Yanowski
- Department of Molecular Genetics, Weizmann Institute of Science, Rehovot 7610001, Israel; Department of Molecular neuroscience, Weizmann Institute of Science, Rehovot 7610001, Israel
| | - Nancy-Sarah Yacovzada
- Department of Molecular Genetics, Weizmann Institute of Science, Rehovot 7610001, Israel; Department of Molecular neuroscience, Weizmann Institute of Science, Rehovot 7610001, Israel
| | - Eyal David
- Department of Immunology, Weizmann Institute of Science, Rehovot 7610001, Israel
| | - Amir Giladi
- Department of Immunology, Weizmann Institute of Science, Rehovot 7610001, Israel
| | - Diego Jaitin
- Department of Immunology, Weizmann Institute of Science, Rehovot 7610001, Israel
| | - Lydia Farack
- Department of Molecular Cell Biology, Weizmann Institute of Science, Rehovot 7610001, Israel
| | - Adi Egozi
- Department of Molecular Cell Biology, Weizmann Institute of Science, Rehovot 7610001, Israel
| | - Danny Ben-Zvi
- Department of Developmental Biology and Cancer Research, Institute for Medical Research Israel-Canada, The Hebrew University-Hadassah Medical School, Jerusalem, 9112102, Israel
| | - Shalev Itzkovitz
- Department of Molecular Cell Biology, Weizmann Institute of Science, Rehovot 7610001, Israel
| | - Ido Amit
- Department of Immunology, Weizmann Institute of Science, Rehovot 7610001, Israel
| | - Eran Hornstein
- Department of Molecular Genetics, Weizmann Institute of Science, Rehovot 7610001, Israel; Department of Molecular neuroscience, Weizmann Institute of Science, Rehovot 7610001, Israel.
| |
Collapse
|
2
|
Wu W, Liu Y, Zeng S, Han Y, Shen H. Intratumor heterogeneity: the hidden barrier to immunotherapy against MSI tumors from the perspective of IFN-γ signaling and tumor-infiltrating lymphocytes. J Hematol Oncol 2021; 14:160. [PMID: 34620200 PMCID: PMC8499512 DOI: 10.1186/s13045-021-01166-3] [Citation(s) in RCA: 34] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2021] [Accepted: 09/07/2021] [Indexed: 12/15/2022] Open
Abstract
In this era of precision medicine, with the help of biomarkers, immunotherapy has significantly improved prognosis of many patients with malignant tumor. Deficient mismatch repair (dMMR)/microsatellite instability (MSI) status is used as a biomarker in clinical practice to predict favorable response to immunotherapy and prognosis. MSI is an important characteristic which facilitates mutation and improves the likelihood of a favorable response to immunotherapy. However, many patients with dMMR/MSI still respond poorly to immunotherapies, which partly results from intratumor heterogeneity propelled by dMMR/MSI. In this review, we discuss how dMMR/MSI facilitates mutations in tumor cells and generates intratumor heterogeneity, especially through type II interferon (IFN-γ) signaling and tumor-infiltrating lymphocytes (TILs). We discuss the mechanism of immunotherapy from the perspective of dMMR/MSI, molecular pathways and TILs, and we discuss how intratumor heterogeneity hinders the therapeutic effect of immunotherapy. Finally, we summarize present techniques and strategies to look at the tumor as a whole to design personalized regimes and achieve favorable prognosis.
Collapse
Affiliation(s)
- Wantao Wu
- Department of Oncology, Xiangya Hospital, Central South University, Changsha, Hunan, People's Republic of China, 410008
- Key Laboratory for Molecular Radiation Oncology of Hunan Province, Xiangya Hospital, Central South University, Changsha, Hunan, People's Republic of China, 410008
| | - Yihan Liu
- Department of Oncology, Xiangya Hospital, Central South University, Changsha, Hunan, People's Republic of China, 410008
- Key Laboratory for Molecular Radiation Oncology of Hunan Province, Xiangya Hospital, Central South University, Changsha, Hunan, People's Republic of China, 410008
| | - Shan Zeng
- Department of Oncology, Xiangya Hospital, Central South University, Changsha, Hunan, People's Republic of China, 410008.
- Key Laboratory for Molecular Radiation Oncology of Hunan Province, Xiangya Hospital, Central South University, Changsha, Hunan, People's Republic of China, 410008.
- National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Central South University, Changsha, Hunan, 410008, People's Republic of China.
| | - Ying Han
- Department of Oncology, Xiangya Hospital, Central South University, Changsha, Hunan, People's Republic of China, 410008.
- Key Laboratory for Molecular Radiation Oncology of Hunan Province, Xiangya Hospital, Central South University, Changsha, Hunan, People's Republic of China, 410008.
- National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Central South University, Changsha, Hunan, 410008, People's Republic of China.
| | - Hong Shen
- Department of Oncology, Xiangya Hospital, Central South University, Changsha, Hunan, People's Republic of China, 410008.
- Key Laboratory for Molecular Radiation Oncology of Hunan Province, Xiangya Hospital, Central South University, Changsha, Hunan, People's Republic of China, 410008.
- National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Central South University, Changsha, Hunan, 410008, People's Republic of China.
| |
Collapse
|
3
|
A CRISPR knockout screen reveals new regulators of canonical Wnt signaling. Oncogenesis 2021; 10:63. [PMID: 34552058 PMCID: PMC8458386 DOI: 10.1038/s41389-021-00354-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2021] [Revised: 08/18/2021] [Accepted: 09/01/2021] [Indexed: 12/18/2022] Open
Abstract
The Wnt signaling pathways play fundamental roles during both development and adult homeostasis. Aberrant activation of the canonical Wnt signal transduction pathway is involved in many diseases including cancer, and is especially implicated in the development and progression of colorectal cancer. Although extensively studied, new genes, mechanisms and regulatory modulators involved in Wnt signaling activation or silencing are still being discovered. Here we applied a genome-scale CRISPR-Cas9 knockout (KO) screen based on Wnt signaling induced cell survival to reveal new inhibitors of the oncogenic, canonical Wnt pathway. We have identified several potential Wnt signaling inhibitors and have characterized the effects of the initiation factor DExH-box protein 29 (DHX29) on the Wnt cascade. We show that KO of DHX29 activates the Wnt pathway leading to upregulation of the Wnt target gene cyclin-D1, while overexpression of DHX29 inhibits the pathway. Together, our data indicate that DHX29 may function as a new canonical Wnt signaling tumor suppressor and demonstrates that this screening approach can be used as a strategy for rapid identification of novel Wnt signaling modulators.
Collapse
|
4
|
Variable Distribution of DOCK-D Proteins between Cytosol and Nucleoplasm in Cell Lines, Effect of Interleukin-4 on DOCK10 in B-Cell Lymphoid Neoplasms, and Validation of a New DOCK10 Antiserum for Immunofluorescence Studies. Antibodies (Basel) 2021; 10:antib10030033. [PMID: 34449554 PMCID: PMC8395434 DOI: 10.3390/antib10030033] [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: 04/15/2021] [Revised: 05/28/2021] [Accepted: 08/16/2021] [Indexed: 11/16/2022] Open
Abstract
Dedicator-of-cytokinesis (DOCK), a family of guanine-nucleotide exchange factors (GEFs), comprises four subfamilies, named from A to D. DOCK-D comprises DOCK9, DOCK10, and DOCK11. The GEF activity involves translocation from the cytoplasm to the plasma membrane (PM), as assessed by the transfection of tagged proteins. However, the cellular localization of endogenous DOCK proteins is poorly understood. In this paper, to gain a better understanding of the role of the DOCK-D proteins, we studied their distribution between cytosol and nucleoplasm in 11 cell lines. DOCK-D proteins were distributed with variable cytosolic or nuclear predominance, although the latter was common for DOCK9 and DOCK11. These results suggest that the DOCK-D proteins may perform new nuclear functions, which remain to be discovered. Furthermore, we found that DOCK10 levels are increased by interleukin-4 (IL-4) in B-cell lymphoid neoplasms other than chronic lymphocytic leukemia (CLL) such as mantle cell lymphoma and diffuse large B-cell lymphoma. We also found evidence for an induction of the cytosolic levels of DOCK10 by IL-4 in CLL. Finally, we obtained a valid DOCK10 antiserum for immunofluorescence (IF) microscopy that, as an antibody against the hemagglutinin (HA) tag, marked PM ruffles and filopodia in HeLa cells with inducible expression of HA-DOCK10.
Collapse
|
5
|
Kotelevets L, Chastre E. Rac1 Signaling: From Intestinal Homeostasis to Colorectal Cancer Metastasis. Cancers (Basel) 2020; 12:cancers12030665. [PMID: 32178475 PMCID: PMC7140047 DOI: 10.3390/cancers12030665] [Citation(s) in RCA: 40] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2020] [Revised: 03/06/2020] [Accepted: 03/08/2020] [Indexed: 12/14/2022] Open
Abstract
The small GTPase Rac1 has been implicated in a variety of dynamic cell biological processes, including cell proliferation, cell survival, cell-cell contacts, epithelial mesenchymal transition (EMT), cell motility, and invasiveness. These processes are orchestrated through the fine tuning of Rac1 activity by upstream cell surface receptors and effectors that regulate the cycling Rac1-GDP (off state)/Rac1-GTP (on state), but also through the tuning of Rac1 accumulation, activity, and subcellular localization by post translational modifications or recruitment into molecular scaffolds. Another level of regulation involves Rac1 transcripts stability and splicing. Downstream, Rac1 initiates a series of signaling networks, including regulatory complex of actin cytoskeleton remodeling, activation of protein kinases (PAKs, MAPKs) and transcription factors (NFkB, Wnt/β-catenin/TCF, STAT3, Snail), production of reactive oxygen species (NADPH oxidase holoenzymes, mitochondrial ROS). Thus, this GTPase, its regulators, and effector systems might be involved at different steps of the neoplastic progression from dysplasia to the metastatic cascade. After briefly placing Rac1 and its effector systems in the more general context of intestinal homeostasis and in wound healing after intestinal injury, the present review mainly focuses on the several levels of Rac1 signaling pathway dysregulation in colorectal carcinogenesis, their biological significance, and their clinical impact.
Collapse
Affiliation(s)
- Larissa Kotelevets
- Institut National de la Santé et de la Recherche Médicale, UMR S 938, Centre de Recherche Saint-Antoine, 75012 Paris, France
- Sorbonne Université, Hôpital Saint-Antoine, Site Bâtiment Kourilsky, 75012 Paris, France
- Correspondence: (L.K.); (E.C.)
| | - Eric Chastre
- Institut National de la Santé et de la Recherche Médicale, UMR S 938, Centre de Recherche Saint-Antoine, 75012 Paris, France
- Sorbonne Université, Hôpital Saint-Antoine, Site Bâtiment Kourilsky, 75012 Paris, France
- Correspondence: (L.K.); (E.C.)
| |
Collapse
|
6
|
Grasso CS, Giannakis M, Wells DK, Hamada T, Mu XJ, Quist M, Nowak JA, Nishihara R, Qian ZR, Inamura K, Morikawa T, Nosho K, Abril-Rodriguez G, Connolly C, Escuin-Ordinas H, Geybels MS, Grady WM, Hsu L, Hu-Lieskovan S, Huyghe JR, Kim YJ, Krystofinski P, Leiserson MDM, Montoya DJ, Nadel BB, Pellegrini M, Pritchard CC, Puig-Saus C, Quist EH, Raphael BJ, Salipante SJ, Shin DS, Shinbrot E, Shirts B, Shukla S, Stanford JL, Sun W, Tsoi J, Upfill-Brown A, Wheeler DA, Wu CJ, Yu M, Zaidi SH, Zaretsky JM, Gabriel SB, Lander ES, Garraway LA, Hudson TJ, Fuchs CS, Ribas A, Ogino S, Peters U. Genetic Mechanisms of Immune Evasion in Colorectal Cancer. Cancer Discov 2018; 8:730-749. [PMID: 29510987 DOI: 10.1158/2159-8290.cd-17-1327] [Citation(s) in RCA: 333] [Impact Index Per Article: 55.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2017] [Revised: 02/13/2018] [Accepted: 02/27/2018] [Indexed: 12/16/2022]
Abstract
To understand the genetic drivers of immune recognition and evasion in colorectal cancer, we analyzed 1,211 colorectal cancer primary tumor samples, including 179 classified as microsatellite instability-high (MSI-high). This set includes The Cancer Genome Atlas colorectal cancer cohort of 592 samples, completed and analyzed here. MSI-high, a hypermutated, immunogenic subtype of colorectal cancer, had a high rate of significantly mutated genes in important immune-modulating pathways and in the antigen presentation machinery, including biallelic losses of B2M and HLA genes due to copy-number alterations and copy-neutral loss of heterozygosity. WNT/β-catenin signaling genes were significantly mutated in all colorectal cancer subtypes, and activated WNT/β-catenin signaling was correlated with the absence of T-cell infiltration. This large-scale genomic analysis of colorectal cancer demonstrates that MSI-high cases frequently undergo an immunoediting process that provides them with genetic events allowing immune escape despite high mutational load and frequent lymphocytic infiltration and, furthermore, that colorectal cancer tumors have genetic and methylation events associated with activated WNT signaling and T-cell exclusion.Significance: This multi-omic analysis of 1,211 colorectal cancer primary tumors reveals that it should be possible to better monitor resistance in the 15% of cases that respond to immune blockade therapy and also to use WNT signaling inhibitors to reverse immune exclusion in the 85% of cases that currently do not. Cancer Discov; 8(6); 730-49. ©2018 AACR.This article is highlighted in the In This Issue feature, p. 663.
Collapse
Affiliation(s)
- Catherine S Grasso
- Department of Medicine, Division of Hematology-Oncology, University of California, Los Angeles, and the Jonsson Comprehensive Cancer Center, Los Angeles, California. .,Parker Institute for Cancer Immunotherapy, San Francisco, California
| | - Marios Giannakis
- Department of Medical Oncology, Dana-Farber Cancer Institute and Harvard Medical School, Boston, Massachusetts.,Broad Institute of MIT and Harvard, Cambridge, Massachusetts
| | - Daniel K Wells
- Parker Institute for Cancer Immunotherapy, San Francisco, California
| | - Tsuyoshi Hamada
- Department of Oncologic Pathology, Dana-Farber Cancer Institute, Boston, Massachusetts
| | - Xinmeng Jasmine Mu
- Department of Medical Oncology, Dana-Farber Cancer Institute and Harvard Medical School, Boston, Massachusetts.,Broad Institute of MIT and Harvard, Cambridge, Massachusetts
| | - Michael Quist
- Department of Medicine, Division of Hematology-Oncology, University of California, Los Angeles, and the Jonsson Comprehensive Cancer Center, Los Angeles, California.,Public Health Sciences Division, Fred Hutchinson Cancer Research Center, Seattle, Washington
| | - Jonathan A Nowak
- Program in MPE Molecular Pathological Epidemiology, Department of Pathology, Brigham and Women's Hospital and Harvard Medical School, Boston, Massachusetts
| | - Reiko Nishihara
- Department of Oncologic Pathology, Dana-Farber Cancer Institute, Boston, Massachusetts.,Program in MPE Molecular Pathological Epidemiology, Department of Pathology, Brigham and Women's Hospital and Harvard Medical School, Boston, Massachusetts.,Department of Biostatistics, Harvard T.H. Chan School of Public Health, Boston, Massachusetts.,Department of Nutrition, Harvard T.H. Chan School of Public Health, Boston, Massachusetts.,Department of Epidemiology, Harvard T.H. Chan School of Public Health, Boston, Massachusetts
| | - Zhi Rong Qian
- Department of Oncologic Pathology, Dana-Farber Cancer Institute, Boston, Massachusetts
| | - Kentaro Inamura
- Department of Medical Oncology, Dana-Farber Cancer Institute and Harvard Medical School, Boston, Massachusetts
| | - Teppei Morikawa
- Department of Medical Oncology, Dana-Farber Cancer Institute and Harvard Medical School, Boston, Massachusetts
| | - Katsuhiko Nosho
- Department of Medical Oncology, Dana-Farber Cancer Institute and Harvard Medical School, Boston, Massachusetts
| | - Gabriel Abril-Rodriguez
- Department of Medicine, Division of Hematology-Oncology, University of California, Los Angeles, and the Jonsson Comprehensive Cancer Center, Los Angeles, California.,Parker Institute for Cancer Immunotherapy, San Francisco, California
| | - Charles Connolly
- Public Health Sciences Division, Fred Hutchinson Cancer Research Center, Seattle, Washington
| | - Helena Escuin-Ordinas
- Department of Medicine, Division of Hematology-Oncology, University of California, Los Angeles, and the Jonsson Comprehensive Cancer Center, Los Angeles, California.,Parker Institute for Cancer Immunotherapy, San Francisco, California
| | - Milan S Geybels
- Public Health Sciences Division, Fred Hutchinson Cancer Research Center, Seattle, Washington
| | - William M Grady
- Clinical Research Division, Fred Hutchinson Cancer Research Center, Seattle, Washington.,Department of Medicine, University of Washington School of Medicine, Seattle, Washington
| | - Li Hsu
- Public Health Sciences Division, Fred Hutchinson Cancer Research Center, Seattle, Washington
| | - Siwen Hu-Lieskovan
- Department of Medicine, Division of Hematology-Oncology, University of California, Los Angeles, and the Jonsson Comprehensive Cancer Center, Los Angeles, California.,Parker Institute for Cancer Immunotherapy, San Francisco, California
| | - Jeroen R Huyghe
- Public Health Sciences Division, Fred Hutchinson Cancer Research Center, Seattle, Washington
| | - Yeon Joo Kim
- Department of Medicine, Division of Hematology-Oncology, University of California, Los Angeles, and the Jonsson Comprehensive Cancer Center, Los Angeles, California.,Parker Institute for Cancer Immunotherapy, San Francisco, California
| | - Paige Krystofinski
- Department of Medicine, Division of Hematology-Oncology, University of California, Los Angeles, and the Jonsson Comprehensive Cancer Center, Los Angeles, California.,Parker Institute for Cancer Immunotherapy, San Francisco, California
| | - Mark D M Leiserson
- Department of Computer Science and Center for Computational Molecular Biology, Brown University, Providence, Rhode Island
| | - Dennis J Montoya
- Department of Molecular, Cell, and Developmental Biology, University of California, Los Angeles, Los Angeles, California
| | - Brian B Nadel
- Department of Molecular, Cell, and Developmental Biology, University of California, Los Angeles, Los Angeles, California
| | - Matteo Pellegrini
- Department of Molecular, Cell, and Developmental Biology, University of California, Los Angeles, Los Angeles, California
| | - Colin C Pritchard
- Department of Laboratory Medicine, University of Washington, Seattle, Washington
| | - Cristina Puig-Saus
- Department of Medicine, Division of Hematology-Oncology, University of California, Los Angeles, and the Jonsson Comprehensive Cancer Center, Los Angeles, California.,Parker Institute for Cancer Immunotherapy, San Francisco, California
| | - Elleanor H Quist
- Department of Medicine, Division of Hematology-Oncology, University of California, Los Angeles, and the Jonsson Comprehensive Cancer Center, Los Angeles, California.,Parker Institute for Cancer Immunotherapy, San Francisco, California
| | - Ben J Raphael
- Department of Computer Science and Center for Computational Molecular Biology, Brown University, Providence, Rhode Island
| | - Stephen J Salipante
- Department of Laboratory Medicine, University of Washington, Seattle, Washington
| | - Daniel Sanghoon Shin
- Department of Medicine, Division of Hematology-Oncology, University of California, Los Angeles, and the Jonsson Comprehensive Cancer Center, Los Angeles, California.,Parker Institute for Cancer Immunotherapy, San Francisco, California
| | - Eve Shinbrot
- Human Genome Sequencing Center, Baylor College of Medicine, Houston, Texas
| | - Brian Shirts
- Department of Laboratory Medicine, University of Washington, Seattle, Washington
| | - Sachet Shukla
- Department of Medical Oncology, Dana-Farber Cancer Institute and Harvard Medical School, Boston, Massachusetts.,Broad Institute of MIT and Harvard, Cambridge, Massachusetts.,Department of Statistics, Iowa State University, Ames, Iowa
| | - Janet L Stanford
- Public Health Sciences Division, Fred Hutchinson Cancer Research Center, Seattle, Washington.,Department of Epidemiology, School of Public Health, University of Washington, Seattle, Washington
| | - Wei Sun
- Public Health Sciences Division, Fred Hutchinson Cancer Research Center, Seattle, Washington
| | - Jennifer Tsoi
- Department of Molecular and Medical Pharmacology, University of California, Los Angeles, Los Angeles, California
| | - Alexander Upfill-Brown
- Department of Medicine, Division of Hematology-Oncology, University of California, Los Angeles, and the Jonsson Comprehensive Cancer Center, Los Angeles, California.,Parker Institute for Cancer Immunotherapy, San Francisco, California
| | - David A Wheeler
- Human Genome Sequencing Center, Baylor College of Medicine, Houston, Texas
| | - Catherine J Wu
- Department of Medical Oncology, Dana-Farber Cancer Institute and Harvard Medical School, Boston, Massachusetts.,Broad Institute of MIT and Harvard, Cambridge, Massachusetts
| | - Ming Yu
- Clinical Research Division, Fred Hutchinson Cancer Research Center, Seattle, Washington
| | - Syed H Zaidi
- Ontario Institute for Cancer Research, MaRS Centre, Toronto, Ontario, Canada
| | - Jesse M Zaretsky
- Department of Medicine, Division of Hematology-Oncology, University of California, Los Angeles, and the Jonsson Comprehensive Cancer Center, Los Angeles, California.,Parker Institute for Cancer Immunotherapy, San Francisco, California
| | | | - Eric S Lander
- Broad Institute of MIT and Harvard, Cambridge, Massachusetts
| | - Levi A Garraway
- Department of Medical Oncology, Dana-Farber Cancer Institute and Harvard Medical School, Boston, Massachusetts.,Broad Institute of MIT and Harvard, Cambridge, Massachusetts
| | - Thomas J Hudson
- Ontario Institute for Cancer Research, MaRS Centre, Toronto, Ontario, Canada.,AbbVie Inc., Redwood City, California
| | - Charles S Fuchs
- Channing Division of Network Medicine, Department of Medicine, Brigham and Women's Hospital, Boston, Massachusetts.,Yale Cancer Center, New Haven, Connecticut.,Department of Medicine, Yale School of Medicine, New Haven, Connecticut.,Smilow Cancer Hospital, New Haven, Connecticut
| | - Antoni Ribas
- Department of Medicine, Division of Hematology-Oncology, University of California, Los Angeles, and the Jonsson Comprehensive Cancer Center, Los Angeles, California.,Parker Institute for Cancer Immunotherapy, San Francisco, California
| | - Shuji Ogino
- Broad Institute of MIT and Harvard, Cambridge, Massachusetts.,Department of Oncologic Pathology, Dana-Farber Cancer Institute, Boston, Massachusetts.,Program in MPE Molecular Pathological Epidemiology, Department of Pathology, Brigham and Women's Hospital and Harvard Medical School, Boston, Massachusetts.,Department of Epidemiology, Harvard T.H. Chan School of Public Health, Boston, Massachusetts
| | - Ulrike Peters
- Public Health Sciences Division, Fred Hutchinson Cancer Research Center, Seattle, Washington.,Department of Epidemiology, School of Public Health, University of Washington, Seattle, Washington
| |
Collapse
|
7
|
Guo Y, Ma X, Wu W, Shi M, Ma J, Zhang Y, Zhao E, Yang X. Coordinated microRNA/mRNA expression profiles reveal a putative mechanism of corneal epithelial cell transdifferentiation from skin epidermal stem cells. Int J Mol Med 2017; 41:877-887. [PMID: 29207049 PMCID: PMC5752239 DOI: 10.3892/ijmm.2017.3304] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2016] [Accepted: 11/15/2017] [Indexed: 01/09/2023] Open
Abstract
Skin epidermal stem cells (SESCs), which share a single origin with corneal epithelial cells (CECs), are considered to be one of the most ideal seed cells for the construction of tissue engineered corneas. However, the mechanism underlying the transdifferentiation of SESCs to CECs has not been fully elucidated. In the present study, to identify critical microRNAs (miRNAs/miRs) and genes that regulate the transdifferentiation of SESCs to CECs, SESCs and CECs were collected from sheep and used for small RNA sequencing and mRNA microarray analyses. Among the differentially expressed miRNAs and genes, 36 miRNAs were downregulated and 123 genes were upregulated in the CECs compared with those in the SESCs. miR-10b exhibited the largest change in expression between the cell types. Target genes of the 36 downregulated miRNAs were predicted and a computational approach demonstrated that these target genes may be involved in several signaling pathways, including the 'PI3K signaling pathway', the 'Wnt signaling pathway' and the 'MAPK signaling pathway', as well as in 'focal adhesion'. Comparison of these target genes to the 123 upregulated genes identified 43 intersection genes. A regulatory network of these 43 intersection genes and its correlative miRNAs were constructed, and three genes (dedicator of cytokinesis 9, neuronal differentiation 1 and activated leukocyte cell adhesion molecule) were found to have high interaction frequencies. The expression levels of 7 randomly selected miRNAs and the 3 intersection genes were further validated by reverse transcription-quantitative polymerase chain reaction. It was found that miR-10b, the Wnt signaling pathway and the 3 intersection genes may act together and serve a critical role in the transdifferentiation process. This study identified miRNAs and genes that were expressed in SESCs and CECs that may assist in uncovering its underlying molecular mechanism, as well as promote corneal tissue engineering using epidermal stem cells for clinical applications.
Collapse
Affiliation(s)
- Yanjie Guo
- Life Science College, Luoyang Normal University, Luoyang, Henan 471934, P.R. China
| | - Xiya Ma
- Life Science College, Luoyang Normal University, Luoyang, Henan 471934, P.R. China
| | - Weini Wu
- Life Science College, Luoyang Normal University, Luoyang, Henan 471934, P.R. China
| | - Mingyan Shi
- Life Science College, Luoyang Normal University, Luoyang, Henan 471934, P.R. China
| | - Junlong Ma
- Life Science College, Luoyang Normal University, Luoyang, Henan 471934, P.R. China
| | - Yaping Zhang
- Life Science College, Luoyang Normal University, Luoyang, Henan 471934, P.R. China
| | - Erkang Zhao
- Life Science College, Luoyang Normal University, Luoyang, Henan 471934, P.R. China
| | - Xueyi Yang
- Life Science College, Luoyang Normal University, Luoyang, Henan 471934, P.R. China
| |
Collapse
|
8
|
Bayesian and frequentist analysis of an Austrian genome-wide association study of colorectal cancer and advanced adenomas. Oncotarget 2017; 8:98623-98634. [PMID: 29228715 PMCID: PMC5716755 DOI: 10.18632/oncotarget.21697] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2017] [Accepted: 09/03/2017] [Indexed: 12/17/2022] Open
Abstract
Most genome-wide association studies (GWAS) were analyzed using single marker tests in combination with stringent correction procedures for multiple testing. Thus, a substantial proportion of associated single nucleotide polymorphisms (SNPs) remained undetected and may account for missing heritability in complex traits. Model selection procedures present a powerful alternative to identify associated SNPs in high-dimensional settings. In this GWAS including 1060 colorectal cancer cases, 689 cases of advanced colorectal adenomas and 4367 controls we pursued a dual approach to investigate genome-wide associations with disease risk applying both, single marker analysis and model selection based on the modified Bayesian information criterion, mBIC2, implemented in the software package MOSGWA. For different case-control comparisons, we report models including between 1-14 candidate SNPs. A genome-wide significant association of rs17659990 (P=5.43×10-9, DOCK3, chromosome 3p21.2) with colorectal cancer risk was observed. Furthermore, 56 SNPs known to influence susceptibility to colorectal cancer and advanced adenoma were tested in a hypothesis-driven approach and several of them were found to be relevant in our Austrian cohort. After correction for multiple testing (α=8.9×10-4), the most significant associations were observed for SNPs rs10505477 (P=6.08×10-4) and rs6983267 (P=7.35×10-4) of CASC8, rs3802842 (P=8.98×10-5, COLCA1,2), and rs12953717 (P=4.64×10-4, SMAD7). All previously unreported SNPs demand replication in additional samples. Reanalysis of existing GWAS datasets using model selection as tool to detect SNPs associated with a complex trait may present a promising resource to identify further genetic risk variants not only for colorectal cancer.
Collapse
|
9
|
Analysis of somatic microsatellite indels identifies driver events in human tumors. Nat Biotechnol 2017; 35:951-959. [DOI: 10.1038/nbt.3966] [Citation(s) in RCA: 83] [Impact Index Per Article: 11.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2016] [Accepted: 08/18/2017] [Indexed: 01/03/2023]
|
10
|
Cui HY, Wang SJ, Miao JY, Fu ZG, Feng F, Wu J, Yang XM, Chen ZN, Jiang JL. CD147 regulates cancer migration via direct interaction with Annexin A2 and DOCK3-β-catenin-WAVE2 signaling. Oncotarget 2016; 7:5613-29. [PMID: 26716413 PMCID: PMC4868709 DOI: 10.18632/oncotarget.6723] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2015] [Accepted: 12/12/2015] [Indexed: 12/31/2022] Open
Abstract
The acquisition of inappropriate migratory feature is crucial for tumor metastasis. It has been suggested that CD147 and Annexin A2 are involved in regulating tumor cell movement, while the regulatory mechanisms are far from clear. In this study, we demonstrated that CD147 physically interacted with the N-terminal domain of Annexin A2 and decreased Annexin A2 phosphorylation on tyrosine 23. In vitro kinase assay showed that the I domain of CD147 was indispensable for CD147-mediated downregulation of Annexin A2 phosphorylation by Src. Furthermore, we determined that p-Annexin A2 promoted the expression of dedicator of cytokinesis 3 (DOCK3) and DOCK3 blocked β-catenin nuclear translocation, resulting in inhibition of β-catenin signaling. In addition, DOCK3 inhibited lamellipodium dynamics and tumor cell movement. Also, we found that β-catenin signaling increased WAVE2 expression. Therefore, DOCK3 was characterized as a negative regulator of WAVE2 expression via inhibiting β-catenin signaling. Our study provides the first evidence that CD147 promotes tumor cell movement and metastasis via direct interaction with Annexin A2 and DOCK3-β-catenin-WAVE2 signaling axis.
Collapse
Affiliation(s)
- Hong-Yong Cui
- Cell Engineering Research Center and Department of Cell Biology, State Key Laboratory of Cancer Biology, National Key Discipline of Cell Biology, Fourth Military Medical University, Xi'an, P.R. China
| | - Shi-Jie Wang
- Cell Engineering Research Center and Department of Cell Biology, State Key Laboratory of Cancer Biology, National Key Discipline of Cell Biology, Fourth Military Medical University, Xi'an, P.R. China
| | - Ji-Yu Miao
- Cell Engineering Research Center and Department of Cell Biology, State Key Laboratory of Cancer Biology, National Key Discipline of Cell Biology, Fourth Military Medical University, Xi'an, P.R. China
| | - Zhi-Guang Fu
- Cell Engineering Research Center and Department of Cell Biology, State Key Laboratory of Cancer Biology, National Key Discipline of Cell Biology, Fourth Military Medical University, Xi'an, P.R. China
| | - Fei Feng
- Cell Engineering Research Center and Department of Cell Biology, State Key Laboratory of Cancer Biology, National Key Discipline of Cell Biology, Fourth Military Medical University, Xi'an, P.R. China
| | - Jiao Wu
- Cell Engineering Research Center and Department of Cell Biology, State Key Laboratory of Cancer Biology, National Key Discipline of Cell Biology, Fourth Military Medical University, Xi'an, P.R. China
| | - Xiang-Min Yang
- Cell Engineering Research Center and Department of Cell Biology, State Key Laboratory of Cancer Biology, National Key Discipline of Cell Biology, Fourth Military Medical University, Xi'an, P.R. China
| | - Zhi-Nan Chen
- Cell Engineering Research Center and Department of Cell Biology, State Key Laboratory of Cancer Biology, National Key Discipline of Cell Biology, Fourth Military Medical University, Xi'an, P.R. China
| | - Jian-Li Jiang
- Cell Engineering Research Center and Department of Cell Biology, State Key Laboratory of Cancer Biology, National Key Discipline of Cell Biology, Fourth Military Medical University, Xi'an, P.R. China
| |
Collapse
|
11
|
Swarup S, Pradhan-Sundd T, Verheyen EM. Genome-wide identification of phospho-regulators of Wnt signaling in Drosophila. Development 2015; 142:1502-15. [DOI: 10.1242/dev.116715] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Evolutionarily conserved intercellular signaling pathways regulate embryonic development and adult tissue homeostasis in metazoans. The precise control of the state and amplitude of signaling pathways is achieved in part through the kinase- and phosphatase-mediated reversible phosphorylation of proteins. In this study, we performed a genome-wide in vivo RNAi screen for kinases and phosphatases that regulate the Wnt pathway under physiological conditions in the Drosophila wing disc. Our analyses have identified 54 high-confidence kinases and phosphatases capable of modulating the Wnt pathway, including 22 novel regulators. These candidates were also assayed for a role in the Notch pathway, and numerous phospho-regulators were identified. Additionally, each regulator of the Wnt pathway was evaluated in the wing disc for its ability to affect the mechanistically similar Hedgehog pathway. We identified 29 dual regulators that have the same effect on the Wnt and Hedgehog pathways. As proof of principle, we established that Cdc37 and Gilgamesh/CK1γ inhibit and promote signaling, respectively, by functioning at analogous levels of these pathways in both Drosophila and mammalian cells. The Wnt and Hedgehog pathways function in tandem in multiple developmental contexts, and the identification of several shared phospho-regulators serve as potential nodes of control under conditions of aberrant signaling and disease.
Collapse
Affiliation(s)
- Sharan Swarup
- Simon Fraser University, Department of Molecular Biology and Biochemistry, Burnaby V5A1S6, British Columbia, Canada
| | - Tirthadipa Pradhan-Sundd
- Simon Fraser University, Department of Molecular Biology and Biochemistry, Burnaby V5A1S6, British Columbia, Canada
| | - Esther M. Verheyen
- Simon Fraser University, Department of Molecular Biology and Biochemistry, Burnaby V5A1S6, British Columbia, Canada
| |
Collapse
|
12
|
Inhibition of RAC1-GEF DOCK3 by miR-512-3p contributes to suppression of metastasis in non-small cell lung cancer. Int J Biochem Cell Biol 2015; 61:103-14. [DOI: 10.1016/j.biocel.2015.02.005] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2014] [Revised: 01/26/2015] [Accepted: 02/06/2015] [Indexed: 12/11/2022]
|
13
|
Walker MP, Stopford CM, Cederlund M, Fang F, Jahn C, Rabinowitz AD, Goldfarb D, Graham DM, Yan F, Deal AM, Fedoriw Y, Richards KL, Davis IJ, Weidinger G, Damania B, Major MB. FOXP1 potentiates Wnt/β-catenin signaling in diffuse large B cell lymphoma. Sci Signal 2015; 8:ra12. [PMID: 25650440 DOI: 10.1126/scisignal.2005654] [Citation(s) in RCA: 56] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
The transcription factor FOXP1 (forkhead box protein P1) is a master regulator of stem and progenitor cell biology. In diffuse large B cell lymphoma (DLBCL), copy number amplifications and chromosomal translocations result in overexpression of FOXP1. Increased abundance of FOXP1 in DLBCL is a predictor of poor prognosis and resistance to therapy. We developed a genome-wide, mass spectrometry-coupled, gain-of-function genetic screen, which revealed that FOXP1 potentiates β-catenin-dependent, Wnt-dependent gene expression. Gain- and loss-of-function studies in cell models and zebrafish confirmed that FOXP1 was a general and conserved enhancer of Wnt signaling. In a Wnt-dependent fashion, FOXP1 formed a complex with β-catenin, TCF7L2 (transcription factor 7-like 2), and the acetyltransferase CBP [CREB (adenosine 3',5'-monophosphate response element-binding protein)-binding protein], and this complex bound the promoters of Wnt target genes. FOXP1 promoted the acetylation of β-catenin by CBP, and acetylation was required for FOXP1-mediated potentiation of β-catenin-dependent transcription. In DLBCL, we found that FOXP1 promoted sensitivity to Wnt pathway inhibitors, and knockdown of FOXP1 or blocking β-catenin transcriptional activity slowed xenograft tumor growth. These data connect excessive FOXP1 with β-catenin-dependent signal transduction and provide a molecular rationale for Wnt-directed therapy in DLBCL.
Collapse
Affiliation(s)
- Matthew P Walker
- Department of Cell Biology and Physiology, Lineberger Comprehensive Cancer Center, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599-7295, USA
| | - Charles M Stopford
- Division of Microbiology, Lineberger Comprehensive Cancer Center, University of North Carolina at Chapel Hill, NC 27516-7361, USA
| | - Maria Cederlund
- Institute for Biochemistry and Molecular Biology, Ulm University, Albert-Einstein-Allee 11, 89081 Ulm, Germany
| | - Fang Fang
- Carolina Center for Genome Sciences, Lineberger Comprehensive Cancer Center, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599-7295, USA
| | - Christopher Jahn
- Institute for Biochemistry and Molecular Biology, Ulm University, Albert-Einstein-Allee 11, 89081 Ulm, Germany
| | - Alex D Rabinowitz
- Department of Cell Biology and Physiology, Lineberger Comprehensive Cancer Center, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599-7295, USA
| | - Dennis Goldfarb
- Department of Computer Science, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599-3175, USA
| | - David M Graham
- Department of Cell Biology and Physiology, Lineberger Comprehensive Cancer Center, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599-7295, USA
| | - Feng Yan
- Department of Cell Biology and Physiology, Lineberger Comprehensive Cancer Center, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599-7295, USA
| | - Allison M Deal
- UNC Lineberger Comprehensive Cancer Center Biostatistics Core Facility, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599-7295, USA
| | - Yuri Fedoriw
- Department of Pathology and Laboratory, Lineberger Comprehensive Cancer Center, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599-7295, USA
| | - Kristy L Richards
- Division of Hematology/Oncology, Lineberger Comprehensive Cancer Center, University of North Carolina at Chapel Hill, NC 27516-7361, USA
| | - Ian J Davis
- Carolina Center for Genome Sciences, Lineberger Comprehensive Cancer Center, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599-7295, USA
| | - Gilbert Weidinger
- Institute for Biochemistry and Molecular Biology, Ulm University, Albert-Einstein-Allee 11, 89081 Ulm, Germany
| | - Blossom Damania
- Division of Microbiology, Lineberger Comprehensive Cancer Center, University of North Carolina at Chapel Hill, NC 27516-7361, USA
| | - Michael B Major
- Department of Cell Biology and Physiology, Lineberger Comprehensive Cancer Center, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599-7295, USA. Division of Microbiology, Lineberger Comprehensive Cancer Center, University of North Carolina at Chapel Hill, NC 27516-7361, USA.
| |
Collapse
|
14
|
Lutz J, Grimm-Günter EMS, Joshi P, Rivero F. Expression analysis of mouse Rhobtb3 using a LacZ reporter and preliminary characterization of a knockout strain. Histochem Cell Biol 2014; 142:511-28. [PMID: 24923387 DOI: 10.1007/s00418-014-1235-9] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/30/2014] [Indexed: 11/28/2022]
Abstract
RhoBTB3 is an atypical member of the Rho family of small GTPases. It localizes at the Golgi apparatus and endosomes and is involved in vesicle trafficking and in targeting proteins for degradation in the proteasome. Previous studies using Northern blot analysis showed that Rhobtb3 is ubiquitously expressed in adult mice, but expression is particularly high in brain, heart and uterus. The gene is also expressed between embryonic days 11.5 and 17.5. To investigate the specific cell types that express this gene across tissues, both in the embryo and in the adult organism, we have made use of a gene trap mouse strain that expresses the LacZ gene under the transcriptional control of the endogenous Rhobtb3 promoter. Histochemical detection of β-galactosidase expression revealed a profile characterized by nearly ubiquitous expression of Rhobtb3 in the embryo, but with particularly high levels in bone, cartilage, all types of muscle, testis and restricted areas of the nervous system. In the adult, expression persists at much lower levels in cardiac muscle, the tunica media of blood vessels and cartilage and at high levels in the seminiferous tubules. A general preliminary characterization of this gene trap mouse strain revealed reduced viability, a postnatal growth defect and reduced testis size. Our results should pave the way for future studies aimed at investigating the roles of RhoBTB3 in tissue development and in cardiac, vascular and testicular function.
Collapse
Affiliation(s)
- Julia Lutz
- Centre for Cardiovascular and Metabolic Research, Hull York Medical School, University of Hull, Cottingham Road, HU6 7RX, Hull, UK
| | | | | | | |
Collapse
|
15
|
Shi L. Dock protein family in brain development and neurological disease. Commun Integr Biol 2013; 6:e26839. [PMID: 24563715 PMCID: PMC3922786 DOI: 10.4161/cib.26839] [Citation(s) in RCA: 52] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2013] [Accepted: 10/16/2013] [Indexed: 02/04/2023] Open
Abstract
The family of dedicator of cytokinesis (Dock), a protein family that belongs to the atypical Rho guanine nucleotide exchange factors (GEFs) for Rac and/or Cdc42 GTPases, plays pivotal roles in various processes of brain development. To date, 11 members of Docks have been identified in the mammalian system. Emerging evidence has suggested that members of the Dock family are associated with several neurodegenerative and neuropsychiatric diseases, including Alzheimer disease and autism spectrum disorders. This review summarizes recent advances on the understanding of the roles of the Dock protein family in normal and diseased processes in the nervous system. Furthermore, interacting proteins and the molecular regulation of Docks are discussed.
Collapse
Affiliation(s)
- Lei Shi
- JNU-HKUST Joint Laboratory for Neuroscience and Innovative Drug Research; Jinan University; Guangdong, PR China ; Division of Life Science; The Hong Kong University of Science and Technology; Hong Kong, PR China
| |
Collapse
|
16
|
Padilla-Nash HM, Hathcock K, McNeil NE, Mack D, Hoeppner D, Ravin R, Knutsen T, Yonescu R, Wangsa D, Dorritie K, Barenboim L, Hu Y, Ried T. Spontaneous transformation of murine epithelial cells requires the early acquisition of specific chromosomal aneuploidies and genomic imbalances. Genes Chromosomes Cancer 2012; 51:353-74. [PMID: 22161874 PMCID: PMC3276700 DOI: 10.1002/gcc.21921] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2011] [Accepted: 11/09/2011] [Indexed: 01/10/2023] Open
Abstract
Human carcinomas are defined by recurrent chromosomal aneuploidies, which result in a tissue-specific distribution of genomic imbalances. In order to develop models for these genome mutations and to determine their role in tumorigenesis, we generated 45 spontaneously transformed murine cell lines from normal epithelial cells derived from bladder, cervix, colon, kidney, lung, and mammary gland. Phenotypic changes, chromosomal aberrations, centrosome number, and telomerase activity were assayed in control uncultured cells and in three subsequent stages of transformation. Supernumerary centrosomes, binucleate cells, and tetraploidy were observed as early as 48 hr after explantation. In addition, telomerase activity increased throughout progression. Live-cell imaging revealed that failure of cytokinesis, not cell fusion, promoted genome duplication. Spectral karyotyping demonstrated that aneuploidy preceded immortalization, consisting predominantly of whole chromosome losses (4, 9, 12, 13, 16, and Y) and gains (1, 10, 15, and 19). After transformation, focal amplifications of the oncogenes Myc and Mdm2 were frequently detected. Fifty percent of the transformed lines resulted in tumors on injection into immunocompromised mice. The phenotypic and genomic alterations observed in spontaneously transformed murine epithelial cells recapitulated the aberration pattern observed during human carcinogenesis. The dominant aberration of these cell lines was the presence of specific chromosomal aneuploidies. We propose that our newly derived cancer models will be useful tools to dissect the sequential steps of genome mutations during malignant transformation, and also to identify cancer-specific genes, signaling pathways, and the role of chromosomal instability in this process.
Collapse
|
17
|
Jang C, Choi J, Na Y, Jang B, Wasco W, Buxbaum JD, Kim Y, Choi E. Calsenilin regulates presenilin 1/γ‐secretase‐mediated N‐cadherin ∊‐cleavage and β‐catenin signaling. FASEB J 2011; 25:4174-83. [DOI: 10.1096/fj.11-185926] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Changhwan Jang
- Ilsong Institute of Life ScienceHallym University Anyang Korea
- Department of MicrobiologyCollege of Medicine, Hallym University Chuncheon Korea
| | - Jin‐Kyu Choi
- Ilsong Institute of Life ScienceHallym University Anyang Korea
| | - Yeo‐Jung Na
- Ilsong Institute of Life ScienceHallym University Anyang Korea
| | - Byungki Jang
- Ilsong Institute of Life ScienceHallym University Anyang Korea
| | - Wilma Wasco
- Genetics and Aging Research Unit, Mass General Institute for Neurodegenerative Disease, Department of NeurologyMassachusetts General Hospital, Harvard Medical School Charlestown Massachusetts USA
| | - Joseph D. Buxbaum
- Laboratory of Molecular Neuropsychiatry, Department of Psychiatry and NeurobiologyMount Sinai School of Medicine New York New York USA
| | - Yong‐Sun Kim
- Ilsong Institute of Life ScienceHallym University Anyang Korea
- Department of MicrobiologyCollege of Medicine, Hallym University Chuncheon Korea
| | - Eun‐Kyoung Choi
- Ilsong Institute of Life ScienceHallym University Anyang Korea
| |
Collapse
|
18
|
Ragusa M, Majorana A, Statello L, Maugeri M, Salito L, Barbagallo D, Guglielmino MR, Duro LR, Angelica R, Caltabiano R, Biondi A, Di Vita M, Privitera G, Scalia M, Cappellani A, Vasquez E, Lanzafame S, Basile F, Di Pietro C, Purrello M. Specific alterations of microRNA transcriptome and global network structure in colorectal carcinoma after cetuximab treatment. Mol Cancer Ther 2010; 9:3396-409. [PMID: 20881268 DOI: 10.1158/1535-7163.mct-10-0137] [Citation(s) in RCA: 88] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
The relationship between therapeutic response and modifications of microRNA (miRNA) transcriptome in colorectal cancer (CRC) remains unknown. We investigated this issue by profiling the expression of 667 miRNAs in 2 human CRC cell lines, one sensitive and the other resistant to cetuximab (Caco-2 and HCT-116, respectively), through TaqMan real-time PCR. Caco-2 and HCT-116 expressed different sets of miRNAs after treatment. Specifically, 21 and 22 miRNAs were differentially expressed in Caco-2 or HCT-116, respectively (t test, P < 0.01). By testing the expression of differentially expressed miRNAs in CRC patients, we found that miR-146b-3p and miR-486-5p are more abundant in K-ras-mutated samples with respect to wild-type ones (Wilcoxon test, P < 0.05). Sixty-seven percent of differentially expressed miRNAs were involved in cancer, including CRC, whereas 19 miRNA targets had been previously reported to be involved in the cetuximab pathway and CRC. We identified 25 transcription factors putatively controlling these miRNAs, 11 of which have been already reported to be involved in CRC. On the basis of these data, we suggest that the downregulation of let-7b and let-7e (targeting K-ras) and the upregulation of miR-17* (a CRC marker) could be considered as candidate molecular markers of cetuximab resistance. Global network functional analysis (based on miRNA targets) showed a significant overrepresentation of cancer-related biological processes and networks centered on critical nodes involved in epidermal growth factor receptor internalization and ubiquitin-mediated degradation. The identification of miRNAs, whose expression is linked to the efficacy of therapy, should allow the ability to predict the response of patients to treatment and possibly lead to a better understanding of the molecular mechanisms of drug response.
Collapse
Affiliation(s)
- Marco Ragusa
- Dipartimento di Scienze BioMediche, Sezione di Biologia Generale, Biologia Cellulare, Genetica Molecolare, Unità di BioMedicina Molecolare Genomica e dei Sistemi Complessi, Genetica, Biologia Computazionale G Sichel, 95123 Catania, Italy
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
19
|
López-Huertas MR, Callejas S, Abia D, Mateos E, Dopazo A, Alcamí J, Coiras M. Modifications in host cell cytoskeleton structure and function mediated by intracellular HIV-1 Tat protein are greatly dependent on the second coding exon. Nucleic Acids Res 2010; 38:3287-307. [PMID: 20139419 PMCID: PMC2879518 DOI: 10.1093/nar/gkq037] [Citation(s) in RCA: 49] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
The human immunodeficiency virus type 1 (HIV-1) regulator Tat is essential for viral replication because it achieves complete elongation of viral transcripts. Tat can be released to the extracellular space and taken up by adjacent cells, exerting profound cytoskeleton rearrangements that lead to apoptosis. In contrast, intracellular Tat has been described as protector from apoptosis. Tat gene is composed by two coding exons that yield a protein of 101 amino acids (aa). First exon (1–72aa) is sufficient for viral transcript elongation and second exon (73–101 aa) appears to contribute to non-transcriptional functions. We observed that Jurkat cells stably expressing intracellular Tat101 showed gene expression deregulation 4-fold higher than cells expressing Tat72. Functional experiments were performed to evaluate the effect of this deregulation. First, NF-κB-, NF-AT- and Sp1-dependent transcriptional activities were greatly enhanced in Jurkat-Tat101, whereas Tat72 induced milder but efficient activation. Second, cytoskeleton-related functions as cell morphology, proliferation, chemotaxis, polarization and actin polymerization were deeply altered in Jurkat-Tat101, but not in Jurkat-Tat72. Finally, expression of several cell surface receptors was dramatically impaired by intracellular Tat101 but not by Tat72. Consequently, these modifications were greatly dependent on Tat second exon and they could be related to the anergy observed in HIV-1-infected T cells.
Collapse
Affiliation(s)
- M R López-Huertas
- AIDS Immunopathology Unit, Centro Nacional de Microbiología, Instituto de Salud Carlos III, Madrid, Spain
| | | | | | | | | | | | | |
Collapse
|