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Parslow VR, Elmore SA, Cochran RZ, Bolon B, Mahler B, Sabio D, Lubeck BA. Histology Atlas of the Developing Mouse Respiratory System From Prenatal Day 9.0 Through Postnatal Day 30. Toxicol Pathol 2024:1926233241252114. [PMID: 39096105 DOI: 10.1177/01926233241252114] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/04/2024]
Abstract
Respiratory diseases are one of the leading causes of death and disability around the world. Mice are commonly used as models of human respiratory disease. Phenotypic analysis of mice with spontaneous, congenital, inherited, or treatment-related respiratory tract abnormalities requires investigators to discriminate normal anatomic features of the respiratory system from those that have been altered by disease. Many publications describe individual aspects of normal respiratory tract development, primarily focusing on morphogenesis of the trachea and lung. However, a single reference providing detailed low- and high-magnification, high-resolution images of routine hematoxylin and eosin (H&E)-stained sections depicting all major structures of the entire developing murine respiratory system does not exist. The purpose of this atlas is to correct this deficiency by establishing one concise reference of high-resolution color photomicrographs from whole-slide scans of H&E-stained tissue sections. The atlas has detailed descriptions and well-annotated images of the developing mouse upper and lower respiratory tracts emphasizing embryonic days (E) 9.0 to 18.5 and major early postnatal events. The selected images illustrate the main structures and events at key developmental stages and thus should help investigators both confirm the chronological age of mouse embryos and distinguish normal morphology as well as structural (cellular and organ) abnormalities.
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Affiliation(s)
| | - Susan A Elmore
- Experimental Pathology Laboratories, Inc., Research Triangle Park, North Carolina, USA
| | - Robert Z Cochran
- National Institute of Environmental Health Sciences, Research Triangle Park, North Carolina, USA
| | | | - Beth Mahler
- Experimental Pathology Laboratories, Inc., Research Triangle Park, North Carolina, USA
| | - David Sabio
- Experimental Pathology Laboratories, Inc., Research Triangle Park, North Carolina, USA
| | - Beth A Lubeck
- National Institute of Environmental Health Sciences, Research Triangle Park, North Carolina, USA
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2
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Pai C, Sengupta R, Heuckeroth RO. Sequencing Reveals miRNAs Enriched in the Developing Mouse Enteric Nervous System. Noncoding RNA 2023; 10:1. [PMID: 38250801 PMCID: PMC10801555 DOI: 10.3390/ncrna10010001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2023] [Revised: 12/01/2023] [Accepted: 12/16/2023] [Indexed: 01/23/2024] Open
Abstract
The enteric nervous system (ENS) is an essential network of neurons and glia in the bowel wall. Defects in ENS development can result in Hirschsprung disease (HSCR), a life-threatening condition characterized by severe constipation, abdominal distention, bilious vomiting, and failure to thrive. A growing body of literature connects HSCR to alterations in miRNA expression, but there are limited data on the normal miRNA landscape in the developing ENS. We sequenced small RNAs (smRNA-seq) and messenger RNAs (mRNA-seq) from ENS precursor cells of mid-gestation Ednrb-EGFP mice and compared them to aggregated RNA from all other cells in the developing bowel. Our smRNA-seq results identified 73 miRNAs that were significantly enriched and highly expressed in the developing ENS, with miR-9, miR-27b, miR-124, miR-137, and miR-488 as our top 5 miRNAs that are conserved in humans. However, contrary to prior reports, our follow-up analyses of miR-137 showed that loss of Mir137 in Nestin-cre, Wnt1-cre, Sox10-cre, or Baf53b-cre lineage cells had no effect on mouse survival or ENS development. Our data provide important context for future studies of miRNAs in HSCR and other ENS diseases and highlight open questions about facility-specific factors in development.
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Affiliation(s)
- Christopher Pai
- The Children’s Hospital of Philadelphia Research Institute, Philadelphia, PA 19104, USA;
- Department of Pediatrics, The Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA
| | - Rajarshi Sengupta
- American Association for Cancer Research, Philadelphia, PA 19106, USA;
| | - Robert O. Heuckeroth
- The Children’s Hospital of Philadelphia Research Institute, Philadelphia, PA 19104, USA;
- Department of Pediatrics, The Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA
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3
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Abatti LE, Lado-Fernández P, Huynh L, Collado M, Hoffman M, Mitchell J. Epigenetic reprogramming of a distal developmental enhancer cluster drives SOX2 overexpression in breast and lung adenocarcinoma. Nucleic Acids Res 2023; 51:10109-10131. [PMID: 37738673 PMCID: PMC10602899 DOI: 10.1093/nar/gkad734] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2023] [Revised: 08/18/2023] [Accepted: 08/24/2023] [Indexed: 09/24/2023] Open
Abstract
Enhancer reprogramming has been proposed as a key source of transcriptional dysregulation during tumorigenesis, but the molecular mechanisms underlying this process remain unclear. Here, we identify an enhancer cluster required for normal development that is aberrantly activated in breast and lung adenocarcinoma. Deletion of the SRR124-134 cluster disrupts expression of the SOX2 oncogene, dysregulates genome-wide transcription and chromatin accessibility and reduces the ability of cancer cells to form colonies in vitro. Analysis of primary tumors reveals a correlation between chromatin accessibility at this cluster and SOX2 overexpression in breast and lung cancer patients. We demonstrate that FOXA1 is an activator and NFIB is a repressor of SRR124-134 activity and SOX2 transcription in cancer cells, revealing a co-opting of the regulatory mechanisms involved in early development. Notably, we show that the conserved SRR124 and SRR134 regions are essential during mouse development, where homozygous deletion results in the lethal failure of esophageal-tracheal separation. These findings provide insights into how developmental enhancers can be reprogrammed during tumorigenesis and underscore the importance of understanding enhancer dynamics during development and disease.
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Affiliation(s)
- Luis E Abatti
- Department of Cell and Systems Biology, University of Toronto, Toronto, Ontario, Canada
| | - Patricia Lado-Fernández
- Laboratory of Cell Senescence, Cancer and Aging, Health Research Institute of Santiago de Compostela (IDIS), Xerencia de Xestión Integrada de Santiago (XXIS/SERGAS), Santiago de Compostela, Spain
- Department of Physiology and Center for Research in Molecular Medicine and Chronic Diseases (CiMUS), Universidade de Santiago de Compostela, Santiago de Compostela, Spain
| | - Linh Huynh
- Princess Margaret Cancer Centre, University Health Network, Toronto, Ontario, Canada
| | - Manuel Collado
- Laboratory of Cell Senescence, Cancer and Aging, Health Research Institute of Santiago de Compostela (IDIS), Xerencia de Xestión Integrada de Santiago (XXIS/SERGAS), Santiago de Compostela, Spain
| | - Michael M Hoffman
- Princess Margaret Cancer Centre, University Health Network, Toronto, Ontario, Canada
- Department of Medical Biophysics, University of Toronto, Toronto, Ontario, Canada
- Department of Computer Science, University of Toronto, Toronto, Ontario, Canada
- Vector Institute for Artificial Intelligence, Toronto, Ontario, Canada
| | - Jennifer A Mitchell
- Department of Cell and Systems Biology, University of Toronto, Toronto, Ontario, Canada
- Laboratory Medicine and Pathobiology, University of Toronto, Toronto, Ontario, Canada
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4
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Gao G, Hausmann S, Flores NM, Benitez AM, Shen J, Yang X, Person MD, Gayatri S, Cheng D, Lu Y, Liu B, Mazur PK, Bedford MT. The NFIB/CARM1 partnership is a driver in preclinical models of small cell lung cancer. Nat Commun 2023; 14:363. [PMID: 36690626 PMCID: PMC9870865 DOI: 10.1038/s41467-023-35864-y] [Citation(s) in RCA: 10] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2022] [Accepted: 01/04/2023] [Indexed: 01/24/2023] Open
Abstract
The coactivator associated arginine methyltransferase (CARM1) promotes transcription, as its name implies. It does so by modifying histones and chromatin bound proteins. We identified nuclear factor I B (NFIB) as a CARM1 substrate and show that this transcription factor utilizes CARM1 as a coactivator. Biochemical studies reveal that tripartite motif 29 (TRIM29) is an effector molecule for methylated NFIB. Importantly, NFIB harbors both oncogenic and metastatic activities, and is often overexpressed in small cell lung cancer (SCLC). Here, we explore the possibility that CARM1 methylation of NFIB is important for its transforming activity. Using a SCLC mouse model, we show that both CARM1 and the CARM1 methylation site on NFIB are critical for the rapid onset of SCLC. Furthermore, CARM1 and methylated NFIB are responsible for maintaining similar open chromatin states in tumors. Together, these findings suggest that CARM1 might be a therapeutic target for SCLC.
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Affiliation(s)
- Guozhen Gao
- Department of Epigenetics and Molecular Carcinogenesis, The University of Texas MD Anderson Cancer Center, Houston, TX, 77030, USA
| | - Simone Hausmann
- Department of Experimental Radiation Oncology, The University of Texas MD Anderson Cancer Center, Houston, TX, 77030, USA
| | - Natasha M Flores
- Department of Experimental Radiation Oncology, The University of Texas MD Anderson Cancer Center, Houston, TX, 77030, USA
| | - Ana Morales Benitez
- Department of Experimental Radiation Oncology, The University of Texas MD Anderson Cancer Center, Houston, TX, 77030, USA
| | - Jianjun Shen
- Department of Epigenetics and Molecular Carcinogenesis, The University of Texas MD Anderson Cancer Center, Houston, TX, 77030, USA
| | - Xiaojie Yang
- Department of Experimental Radiation Oncology, The University of Texas MD Anderson Cancer Center, Houston, TX, 77030, USA
| | - Maria D Person
- Center for Biomedical Research Support, The University of Texas at Austin, Austin, TX, 78712, USA
| | - Sitaram Gayatri
- Department of Epigenetics and Molecular Carcinogenesis, The University of Texas MD Anderson Cancer Center, Houston, TX, 77030, USA
- Evozyne Inc., Chicago, IL, 60614, USA
| | - Donghang Cheng
- Department of Pediatrics, The University of Texas MD Anderson Cancer Center, Houston, TX, 77030, USA
| | - Yue Lu
- Department of Epigenetics and Molecular Carcinogenesis, The University of Texas MD Anderson Cancer Center, Houston, TX, 77030, USA
| | - Bin Liu
- Department of Epigenetics and Molecular Carcinogenesis, The University of Texas MD Anderson Cancer Center, Houston, TX, 77030, USA
| | - Pawel K Mazur
- Department of Experimental Radiation Oncology, The University of Texas MD Anderson Cancer Center, Houston, TX, 77030, USA.
| | - Mark T Bedford
- Department of Epigenetics and Molecular Carcinogenesis, The University of Texas MD Anderson Cancer Center, Houston, TX, 77030, USA.
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5
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Baguma-Nibasheka M, Kablar B. Mechanics of Lung Development. ADVANCES IN ANATOMY, EMBRYOLOGY, AND CELL BIOLOGY 2023; 236:131-150. [PMID: 37955774 DOI: 10.1007/978-3-031-38215-4_6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/14/2023]
Abstract
We summarize how skeletal muscle and lung developmental biology fields have been bridged to benefit from mouse genetic engineering technologies and to explore the role of fetal breathing-like movements (FBMs) in lung development, by using skeletal muscle-specific mutant mice. It has been known for a long time that FBMs are essential for the lung to develop properly. However, the cellular and molecular mechanisms transducing the mechanical forces of muscular activity into specific genetic programs that propel lung morphogenesis (development of the shape, form and size of the lung, its airways, and gas exchange surface) as well as its differentiation (acquisition of specialized cell structural and functional features from their progenitor cells) are only starting to be revealed. This chapter is a brief synopsis of the cumulative findings from that ongoing quest. An update on and the rationale for our recent International Mouse Phenotyping Consortium (IMPC) search is also provided.
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Affiliation(s)
- Mark Baguma-Nibasheka
- Department of Pharmacology, Faculty of Medicine, Dalhousie University, Halifax, NS, Canada.
| | - Boris Kablar
- Department of Medical Neuroscience, Anatomy and Pathology, Faculty of Medicine, Dalhousie University, Halifax, NS, Canada
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6
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Yan XR, Shi T, Xiao JY, Liu YF, Zheng HL. In vitro transdifferentiated signatures of goat preadipocytes into mammary epithelial cells revealed by DNA methylation and transcriptome profiling. J Biol Chem 2022; 298:102604. [PMID: 36257406 PMCID: PMC9668736 DOI: 10.1016/j.jbc.2022.102604] [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: 06/07/2022] [Revised: 10/06/2022] [Accepted: 10/10/2022] [Indexed: 11/07/2022] Open
Abstract
During mammary development, the transdifferentiation of mammary preadipocytes is one of the important sources for lactating mammary epithelial cells (MECs). However, there is limited knowledge about the mechanisms of dynamic regulation of transcriptome and genome-wide DNA methylation in the preadipocyte transdifferentiation process. Here, to gain more insight into these mechanisms, preadipocytes were isolated from adipose tissues from around the goat mammary gland (GM-preadipocytes). The GM-preadipocytes were cultured on Matrigel in conditioned media made from goat MECs to induce GM-preadipocyte-to-MEC transdifferentiation. The transdifferentiated GM-preadipocytes showed high abundance of keratin 18, which is a marker protein of MECs, and formed mammary acinar-like structures after 8 days of induction. Then, we performed transcriptome and DNA methylome profiling of the GM-preadipocytes and transdifferentiated GM-preadipocytes, respectively, and the differentially expressed genes and differentially methylated genes that play underlying roles in the process of transdifferentiation were obtained. Subsequently, we identified the candidate transcription factors in regulating the GM-preadipocyte-to-MEC transdifferentiation by transcription factor-binding motif enrichment analysis of differentially expressed genes and differentially methylated genes. Meanwhile, the secretory proteome of GM-preadipocytes cultured in conditioned media was also detected. By integrating the transcriptome, DNA methylome, and proteome, three candidate genes, four proteins, and several epigenetic regulatory axes were further identified, which are involved in regulation of the cell cycle, cell polarity establishment, cell adhesion, cell reprogramming, and adipocyte plasticity. These findings provide novel insights into the molecular mechanism of preadipocyte transdifferentiation and mammary development.
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7
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Zhou L, Wang QL, Mao LH, Chen SY, Yang ZH, Liu X, Gao YH, Li XQ, Zhou ZH, He S. Hepatocyte-Specific Knock-Out of Nfib Aggravates Hepatocellular Tumorigenesis via Enhancing Urea Cycle. Front Mol Biosci 2022; 9:875324. [PMID: 35655758 PMCID: PMC9152321 DOI: 10.3389/fmolb.2022.875324] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2022] [Accepted: 03/28/2022] [Indexed: 12/23/2022] Open
Abstract
Nuclear Factor I B (NFIB) has been reported to promote tumor growth, metastasis, and liver regeneration, but its mechanism in liver cancer is not fully elucidated. The present study aims to reveal the role of NFIB in hepatocellular carcinogenesis. In our study, we constructed hepatocyte-specific NFIB gene knockout mice with CRISPR/Cas9 technology (Nfib-/-; Alb-cre), and induced liver cancer mouse model by intraperitoneal injection of DEN/CCl4. First, we found that Nfib-/- mice developed more tumor nodules and had heavier livers than wild-type mice. H&E staining indicated that the liver histological severity of Nfib-/- group was more serious than that of WT group. Then we found that the differentially expressed genes in the tumor tissue between Nfib-/- mice and wild type mice were enriched in urea cycle. Furthermore, ASS1 and CPS1, the core enzymes of the urea cycle, were significantly upregulated in Nfib-/- tumors. Subsequently, we validated that the expression of ASS1 and CPS1 increased after knockdown of NFIB by lentivirus in normal hepatocytes and also promoted cell proliferation in vitro. In addition, ChIP assay confirmed that NFIB can bind with promoter region of both ASS1 and CPS1 gene. Our study reveals for the first time that hepatocyte-specific knock-out of Nfib aggravates hepatocellular tumor development by enhancing the urea cycle.
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Affiliation(s)
- Li Zhou
- Department of Gastroenterology, The Second Affiliated Hospital of Chongqing Medical University, Chongqing, China
| | - Qing-Liang Wang
- Department of Pathology, The Second Affiliated Hospital of Chongqing Medical University, Chongqing, China
| | - Lin-Hong Mao
- Department of Gastroenterology, The Second Affiliated Hospital of Chongqing Medical University, Chongqing, China.,Department of Gastroenterology, Chengdu Second People's Hospital, Sichuan, China
| | - Si-Yuan Chen
- Department of Gastroenterology, The Second Affiliated Hospital of Chongqing Medical University, Chongqing, China
| | - Zi-Han Yang
- Department of Biomedical Science, City University of Hong Kong, Hong Kong, China
| | - Xue Liu
- Department of Pathology, College of Basic Medicine, Jining Medical University, Jining, China
| | - Yu-Hua Gao
- Key Laboratory of Precision Oncology in Universities of Shandong, Institute of Precision Medicine, Jining Medical University, Jining, China
| | - Xiao-Qin Li
- Department of Gastroenterology, The Second Affiliated Hospital of Chongqing Medical University, Chongqing, China
| | - Zhi-Hang Zhou
- Department of Gastroenterology, The Second Affiliated Hospital of Chongqing Medical University, Chongqing, China
| | - Song He
- Department of Gastroenterology, The Second Affiliated Hospital of Chongqing Medical University, Chongqing, China
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8
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Wang H, Sun Y, Ma G, Ke D, Zeng Z, Zhang X, Zhang W. The Relationship between Expression of Nuclear Factor I and the Progressive Occurrence of Diabetic Retinopathy. COMPUTATIONAL AND MATHEMATICAL METHODS IN MEDICINE 2022; 2022:1272729. [PMID: 35669369 PMCID: PMC9166938 DOI: 10.1155/2022/1272729] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/19/2022] [Revised: 02/24/2022] [Accepted: 03/05/2022] [Indexed: 12/03/2022]
Abstract
The loss of nuclear factor I (NFI) function can lead to defects in Muller's glial differentiation, abnormalities of retinal morphology, and changes in retinal neurons numbers, which are highly involved in diabetic retinopathy (DR). In this study, we addressed the roles of NFIA and NFIB gene expression in the development of DR by using diabetes mellitus (DM) rat models. Retinal histologies were examined, and the expression of NFIA and NFIB at mRNA and protein levels was detected. The results showed that retinal edema and disordered cell arrangement frequently occurred in DR rats. The expressions of NFIA and NFIB in retinal tissue were significantly decreased in DM rats with DR complications. After further inhibiting the expression of NFIA gene in DM rats by using RNA-silencing, majority of DM rats occurred retinopathy and lens fibrosis, which indicated the relationship between decreased expression of NFI and occurrence of retinopathy in DM.
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Affiliation(s)
- Han Wang
- Department of Special Medicine, Medical College, Qingdao University, Qingdao, Shandong Province, China
| | - Yufei Sun
- Department of Special Medicine, Medical College, Qingdao University, Qingdao, Shandong Province, China
| | - Guixin Ma
- Department of Medical Microbiology, Medical College, Qingdao University, Qingdao, Shandong Province, China
| | - Dingxin Ke
- Department of Special Medicine, Medical College, Qingdao University, Qingdao, Shandong Province, China
| | - Zhou Zeng
- Department of Special Medicine, Medical College, Qingdao University, Qingdao, Shandong Province, China
| | - Xianjuan Zhang
- Department of Medical Microbiology, Medical College, Qingdao University, Qingdao, Shandong Province, China
| | - Wanming Zhang
- Department of Special Medicine, Medical College, Qingdao University, Qingdao, Shandong Province, China
- Qingdao Wanming Biocell Pharmaceutics Co., Ltd, Qingdao, Shandong Province, China
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9
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Transcriptional Regulation of RIP2 Gene by NFIB Is Associated with Cellular Immune and Inflammatory Response to APEC Infection. Int J Mol Sci 2022; 23:ijms23073814. [PMID: 35409172 PMCID: PMC8998712 DOI: 10.3390/ijms23073814] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2022] [Revised: 03/23/2022] [Accepted: 03/29/2022] [Indexed: 02/04/2023] Open
Abstract
Avian pathogenic E. coli (APEC) can cause localized or systemic infection, resulting in large economic losses per year, and impact health of humans. Previous studies showed that RIP2 (receptor interacting serine/threonine kinase 2) and its signaling pathway played an important role in immune response against APEC infection. In this study, chicken HD11 cells were used as an in vitro model to investigate the function of chicken RIP2 and the transcription factor binding to the RIP2 core promoter region via gene overexpression, RNA interference, RT-qPCR, Western blotting, dual luciferase reporter assay, CHIP-PCR, CCK-8, and flow cytometry assay following APEC stimulation. Results showed that APEC stimulation promoted RIP2 expression and cells apoptosis, and inhibited cells viability. Knockdown of RIP2 significantly improved cell viability and suppressed the apoptosis of APEC-stimulated cells. Transcription factor NFIB (Nuclear factor I B) and GATA1 (globin transcription factor 1) binding site was identified in the core promoter region of RIP2 from −2300 bp to −1839 bp. However, only NFIB was confirmed to be bound to the core promoter of RIP2. Overexpression of NFIB exacerbated cell injuries with significant reduction in cell viability and increased cell apoptosis and inflammatory cytokines levels, whereas opposite results were observed in NFIB inhibition treatment group. Moreover, RIP2 was up-regulated by NFIB overexpression, and RIP2 silence mitigated the effect of NFIB overexpression in cell apoptosis, inflammation, and activation of NFκB signaling pathways. This study demonstrated that NFIB overexpression accelerated APEC-induced apoptosis and inflammation via up-regulation of RIP2 mediated downstream pathways in chicken HD11 cells.
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10
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Huang H, Jin J, Wu L, Wu H, Pi H, Dong Y, Xiang R. A de novo Non-sense Nuclear Factor I B Mutation (p.Tyr290*) Is Responsible for Brain Malformation and Lung Lobulation Defects. Front Pediatr 2022; 10:865181. [PMID: 35433561 PMCID: PMC9005976 DOI: 10.3389/fped.2022.865181] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/29/2022] [Accepted: 03/07/2022] [Indexed: 12/02/2022] Open
Abstract
BACKGROUND Nuclear factor I B (NFIB) plays an important role in regulating the transcription of multiple biological processes. Mutations in NFIB cause intellectual disability and macrocephaly. However, studies on abnormal brain and lung development caused by NFIB mutations are lacking. METHODS In the present study, we enrolled a fetus with brain malformation and lung lobulation defects from China. Whole-exome sequencing (WES) was performed to detect the candidate genes and Sanger sequencing was performed for mutational analysis. RESULTS After data filtering and bioinformatics prediction, a novel non-sense mutation of NFIB (NM_001190737:c.870C > A;p.Tyr290*) was identified in the fetus. This variant was predicted to produce a truncated NFIB protein because of a premature stop codon and was absent in 200 healthy controls. CONCLUSION To the best of our knowledge, this is the first case of brain malformation and lung lobulation defects caused by a NFIB variant in Asia. These findings contribute to genetic diagnosis and family counseling and expand our understanding of NFIB mutations as well as brain and lung maturation.
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Affiliation(s)
- Hao Huang
- Department of Nephrology, Xiangya Hospital, Central South University, Changsha, China.,National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Central South University, Changsha, China.,Department of Cell Biology, School of Life Sciences, Central South University, Changsha, China
| | - Jieyuan Jin
- National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Central South University, Changsha, China.,Department of Cell Biology, School of Life Sciences, Central South University, Changsha, China
| | - Liping Wu
- Department of Medical Genetics and Prenatal Diagnosis, Shenzhen Longgang District Maternity and Child Healthcare Hospital, Shenzhen, China
| | - Huifen Wu
- Obstetric Inpatient Department, Shenzhen Longgang District Maternity and Child Healthcare Hospital, Shenzhen, China
| | - Huichun Pi
- Department of Medical Genetics and Prenatal Diagnosis, Shenzhen Longgang District Maternity and Child Healthcare Hospital, Shenzhen, China
| | - Yi Dong
- National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Central South University, Changsha, China.,Department of Cell Biology, School of Life Sciences, Central South University, Changsha, China
| | - Rong Xiang
- National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Central South University, Changsha, China.,Department of Cell Biology, School of Life Sciences, Central South University, Changsha, China
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11
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Pan D, Qian B, Zhao D, Yao B. Nfib promotes chondrocyte proliferation and inhibits differentiation by mildly regulating Sox9 and its downstream genes. Mol Biol Rep 2021; 48:7487-7497. [PMID: 34651294 DOI: 10.1007/s11033-021-06767-2] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2021] [Accepted: 09/15/2021] [Indexed: 01/18/2023]
Abstract
BACKGROUND Chondrocyte proliferation and differentiation play pivotal roles in regulating cartilage formation, endochondral bone formation, and repair. Cartilage damage and underdevelopment may cause severe joint diseases. Various transcription factors regulate cartilage development. Nuclear factor 1 B (Nfib) is a transcription factor that plays a regulatory role in various organs. However, the effect and mechanism of Nfib on the proliferation and differentiation of chondrocytes in cartilage are still largely unknown. METHODS AND RESULTS In the present study, we investigated the gene expression patterns in primary chondrocytes with Nfib overexpression or silencing by RNA sequencing (RNA-seq) technology. The results showed that Nfib overexpression significantly up-regulated genes that are related to chondrocyte proliferation and extracellular matrix (ECM) synthesis and significantly down-regulated genes related to chondrocyte differentiation and ECM degradation. However, with Nfib silencing, the genes involved in promoting chondrocyte differentiation were significantly up-regulated, whereas those involved in promoting chondrocyte proliferation were significantly down-regulated. Furthermore, quantitative real-time PCR (qRT-PCR), western blot, alcian blue staining and immunofluorescence staining assays further confirmed that Nfib potentially promotes chondrocyte proliferation and extracellular synthesis but inhibits differentiation. CONCLUSIONS The molecular mechanism of Nfib in promoting chondrocyte proliferation and inhibiting differentiation was probably achieved by stimulating Sox9 and its downstream genes. Thus, this study adds new insights regarding the underlying molecular mechanism of transcriptional regulation in cartilage.
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Affiliation(s)
- Daian Pan
- Jilin Ginseng Academy, Changchun University of Chinese Medicine, Changchun, China
| | - Benxin Qian
- Department of Thoracic Surgery, The First Hospital of Jilin University, Changchun, China
| | - Daqing Zhao
- Jilin Ginseng Academy, Changchun University of Chinese Medicine, Changchun, China.
| | - Baojin Yao
- Jilin Ginseng Academy, Changchun University of Chinese Medicine, Changchun, China.
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12
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Adam RC, Yang H, Ge Y, Infarinato NR, Gur-Cohen S, Miao Y, Wang P, Zhao Y, Lu CP, Kim JE, Ko JY, Paik SS, Gronostajski RM, Kim J, Krueger JG, Zheng D, Fuchs E. NFI transcription factors provide chromatin access to maintain stem cell identity while preventing unintended lineage fate choices. Nat Cell Biol 2020; 22:640-650. [PMID: 32393888 PMCID: PMC7367149 DOI: 10.1038/s41556-020-0513-0] [Citation(s) in RCA: 47] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2019] [Accepted: 03/30/2020] [Indexed: 12/13/2022]
Abstract
Tissue homeostasis and regeneration rely on resident stem cells (SCs), whose behaviour is regulated through niche-dependent crosstalk. The mechanisms underlying SC identity are still unfolding. Here, using spatiotemporal gene ablation in murine hair follicles, we uncover a critical role for the transcription factors (TFs) nuclear factor IB (NFIB) and IX (NFIX) in maintaining SC identity. Without NFI TFs, SCs lose their hair-regenerating capability, and produce skin bearing striking resemblance to irreversible human alopecia, which also displays reduced NFIs. Through single-cell transcriptomics, ATAC-Seq and ChIP-Seq profiling, we expose a key role for NFIB and NFIX in governing super-enhancer maintenance of the key hair follicle SC-specific TF genes. When NFIB and NFIX are genetically removed, the stemness epigenetic landscape is lost. Super-enhancers driving SC identity are decommissioned, while unwanted lineages are de-repressed ectopically. Together, our findings expose NFIB and NFIX as crucial rheostats of tissue homeostasis, functioning to safeguard the SC epigenome from a breach in lineage confinement that otherwise triggers irreversible tissue degeneration.
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Affiliation(s)
- Rene C Adam
- Robin Chemers Neustein Laboratory of Mammalian Cell Biology and Development, Howard Hughes Medical Institute, The Rockefeller University, New York, NY, USA
- Regeneron Pharmaceuticals, New York, NY, USA
| | - Hanseul Yang
- Robin Chemers Neustein Laboratory of Mammalian Cell Biology and Development, Howard Hughes Medical Institute, The Rockefeller University, New York, NY, USA
| | - Yejing Ge
- Robin Chemers Neustein Laboratory of Mammalian Cell Biology and Development, Howard Hughes Medical Institute, The Rockefeller University, New York, NY, USA
- Department of Cancer Biology, University of Texas, MD Anderson Cancer Center, Houston, TX, USA
| | - Nicole R Infarinato
- Robin Chemers Neustein Laboratory of Mammalian Cell Biology and Development, Howard Hughes Medical Institute, The Rockefeller University, New York, NY, USA
| | - Shiri Gur-Cohen
- Robin Chemers Neustein Laboratory of Mammalian Cell Biology and Development, Howard Hughes Medical Institute, The Rockefeller University, New York, NY, USA
| | - Yuxuan Miao
- Robin Chemers Neustein Laboratory of Mammalian Cell Biology and Development, Howard Hughes Medical Institute, The Rockefeller University, New York, NY, USA
| | - Ping Wang
- Department of Genetics, Albert Einstein College of Medicine, New York, NY, USA
| | - Yilin Zhao
- Department of Genetics, Albert Einstein College of Medicine, New York, NY, USA
| | - Catherine P Lu
- Robin Chemers Neustein Laboratory of Mammalian Cell Biology and Development, Howard Hughes Medical Institute, The Rockefeller University, New York, NY, USA
- The Hansjörg Wyss Department of Plastic Surgery, New York University School of Medicine, New York, NY, USA
| | - Jeong E Kim
- Department of Dermatology, College of Medicine, Hanyang University, Seoul, South Korea
| | - Joo Y Ko
- Department of Dermatology, College of Medicine, Hanyang University, Seoul, South Korea
| | - Seung S Paik
- Department of Pathology, College of Medicine, Hanyang University, Seoul, South Korea
| | - Richard M Gronostajski
- Department of Biochemistry, Developmental Genomics Group, NYS Center of Excellence in Bioinformatics and Life Sciences, State University of New York at Buffalo, New York, NY, USA
| | - Jaehwan Kim
- Laboratory for Investigative Dermatology, The Rockefeller University, New York, NY, USA
- Division of Dermatology, Montefiore Medical Center, Albert Einstein College of Medicine, New York, NY, USA
| | - James G Krueger
- Laboratory for Investigative Dermatology, The Rockefeller University, New York, NY, USA
| | - Deyou Zheng
- Department of Genetics, Albert Einstein College of Medicine, New York, NY, USA
- Departments of Neurology and Neuroscience, Albert Einstein College of Medicine, New York, NY, USA
| | - Elaine Fuchs
- Robin Chemers Neustein Laboratory of Mammalian Cell Biology and Development, Howard Hughes Medical Institute, The Rockefeller University, New York, NY, USA.
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13
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Mesenchyme-specific deletion of Tgf-β1 in the embryonic lung disrupts branching morphogenesis and induces lung hypoplasia. J Transl Med 2019; 99:1363-1375. [PMID: 31028279 PMCID: PMC7422700 DOI: 10.1038/s41374-019-0256-3] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2019] [Revised: 03/06/2019] [Accepted: 03/13/2019] [Indexed: 01/08/2023] Open
Abstract
Proper lung development depends on the precise temporal and spatial expression of several morphogenic factors, including Fgf10, Fgf9, Shh, Bmp4, and Tgf-β. Over- or under-expression of these molecules often leads to aberrant embryonic or postnatal lung development. Herein, we deleted the Tgf-β1 gene specifically within the lung embryonic mesenchymal compartment at specific gestational stages to determine the contribution of this cytokine to lung development. Mutant embryos developed severe lung hypoplasia and died at birth due to the inability to breathe. Despite the markedly reduced lung size, proliferation and differentiation of the lung epithelium was not affected by the lack of mesenchymal expression of the Tgf-β1 gene, while apoptosis was significantly increased in the mutant lung parenchyma. Lack of mesenchymal expression of the Tgf-β1 gene was also associated with reduced lung branching morphogenesis, with accompanying inhibition of the local FGF10 signaling pathway as well as abnormal development of the vascular system. To shed light on the mechanism of lung hypoplasia, we quantified the phosphorylation of 226 proteins in the mutant E12.5 lung compared with control. We identified five proteins, Hrs, Vav2, c-Kit, the regulatory subunit of Pi3k (P85), and Fgfr1, that were over- or under-phosphorylated in the mutant lung, suggesting that they could be indispensable effectors of the TGF-β signaling program during embryonic lung development. In conclusion, we have uncovered novel roles of the mesenchyme-specific Tgf-β1 ligand in embryonic mouse lung development and generated a mouse model that may prove helpful to identify some of the key pathogenic mechanisms underlying lung hypoplasia in humans.
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14
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Nash C, Boufaied N, Badescu D, Wang YC, Paliouras M, Trifiro M, Ragoussis I, Thomson AA. Genome-wide analysis of androgen receptor binding and transcriptomic analysis in mesenchymal subsets during prostate development. Dis Model Mech 2019; 12:12/7/dmm039297. [PMID: 31350272 PMCID: PMC6679388 DOI: 10.1242/dmm.039297] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2019] [Accepted: 06/21/2019] [Indexed: 12/19/2022] Open
Abstract
Prostate development is controlled by androgens, the androgen receptor (AR) and mesenchymal–epithelial signalling. We used chromatin immunoprecipitation sequencing (ChIP-seq) to define AR genomic binding in the male and female mesenchyme. Tissue- and single-cell-based transcriptional profiling was used to define mesenchymal AR target genes. We observed significant AR genomic binding in females and a strong enrichment at proximal promoters in both sexes. In males, there was greater AR binding to introns and intergenic regions as well as to classical AR binding motifs. In females, there was increased proximal promoter binding and involvement of cofactors. Comparison of AR-bound genes with transcriptomic data enabled the identification of novel sexually dimorphic AR target genes. We validated the dimorphic expression of AR target genes using published datasets and confirmed regulation by androgens using ex vivo organ cultures. AR targets showed variable expression in patients with androgen insensitivity syndrome. We examined AR function at single-cell resolution using single-cell RNA sequencing (scRNA-seq) in male and female mesenchyme. Surprisingly, both AR and target genes were distributed throughout cell subsets, with few positive cells within each subset. AR binding was weakly correlated with target gene expression. Summary: A study of how androgens lead to sexually dimorphic development of the prostate using transcription factor genome binding and transcriptome analysis in mesenchymal subsets.
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Affiliation(s)
- Claire Nash
- Department of Surgery, Division of Urology, McGill University and the Cancer Research Program of the Research Institute of McGill University Health Centre, Montreal, Quebec, Canada H4A 3J1
| | - Nadia Boufaied
- Department of Surgery, Division of Urology, McGill University and the Cancer Research Program of the Research Institute of McGill University Health Centre, Montreal, Quebec, Canada H4A 3J1
| | - Dunarel Badescu
- McGill University and Genome Quebec Innovation Center, Montreal, Quebec, Canada H3A 0G1
| | - Yu Chang Wang
- McGill University and Genome Quebec Innovation Center, Montreal, Quebec, Canada H3A 0G1
| | - Miltiadis Paliouras
- Division of Endocrinology, Department of Medicine, Sir Mortimer B. Davis-Jewish General Hospital, 5750 Côte-des-Neiges Rd, Montreal, QC, Canada H3S 1Y9
| | - Mark Trifiro
- Division of Endocrinology, Department of Medicine, Sir Mortimer B. Davis-Jewish General Hospital, 5750 Côte-des-Neiges Rd, Montreal, QC, Canada H3S 1Y9
| | - Ioannis Ragoussis
- McGill University and Genome Quebec Innovation Center, Montreal, Quebec, Canada H3A 0G1
| | - Axel A Thomson
- Department of Surgery, Division of Urology, McGill University and the Cancer Research Program of the Research Institute of McGill University Health Centre, Montreal, Quebec, Canada H4A 3J1
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15
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A novel role for NFIA in restoring radiosensitivity in radioresistant NSCLC cells by downregulating the AKT and ERK pathways. Biochem Biophys Res Commun 2019; 515:558-564. [PMID: 31178144 DOI: 10.1016/j.bbrc.2019.06.011] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2019] [Accepted: 06/02/2019] [Indexed: 12/27/2022]
Abstract
Radioresistance remains the most challenging issue leading to radiotherapy failure in the treatment of non-small cell lung cancer (NSCLC). The nuclear factor IA (NFIA) is associated with tumor response to treatments in many cancers, but its role in NSCLC radioresistance remains unclear. Here, we established two radioresistant NSCLC cell lines, H226R and H460R, by dose-gradient irradiation to investigate the function of NFIA in NSCLC radioresistance. The results showed a dramatically reduced expression of NFIA in radioresistant cells accompanied with elevated phosphorylation of AKT and ERK, when compared with their parental cells. Overexpression of NFIA restored the sensitivity of radioresistant cells to radiation through increased ionizing radiation (IR)-induced apoptosis and DNA damage by downregulating p-AKT and p-ERK, whereas knockdown of NFIA promoted radioresistance of the parental cells. Our findings suggested that NFIA enhanced cell radiosensitivity by downregulating p-AKT and p-ERK in NSCLC. Our study fills a gap in the field of NFIA and radioresistance, and establishes a mechanistic foundation to improve radiotherapy efficiency in NSCLC patients.
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16
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Qiu W, Chuong CM, Lei M. Regulation of melanocyte stem cells in the pigmentation of skin and its appendages: Biological patterning and therapeutic potentials. Exp Dermatol 2019; 28:395-405. [PMID: 30537004 DOI: 10.1111/exd.13856] [Citation(s) in RCA: 40] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2018] [Revised: 11/27/2018] [Accepted: 12/05/2018] [Indexed: 12/13/2022]
Abstract
Skin evolves essential appendages and indispensable types of cells that synergistically insulate the body from environmental insults. Residing in the specific regions in the skin such as epidermis, dermis and hair follicle, melanocytes perform an array of vital functions including defending the ultraviolet radiation and diversifying animal appearance. As one of the adult stem cells, melanocyte stem cells in the hair follicle bulge niche can proliferate, differentiate and keep quiescence to control and coordinate tissue homeostasis, repair and regeneration. In synchrony with hair follicle stem cells, melanocyte stem cells in the hair follicles undergo cyclic activation, degeneration and resting phases, to pigment the hairs and to preserve the stem cells. Disorder of melanocytes results in severe skin problems such as canities, vitiligo and even melanoma. Here, we compare and summarize recent discoveries about melanocyte in the skin, particularly in the hair follicle. A better understanding of the physiological and pathological regulation of melanocyte and melanocyte stem cell behaviours will help to guide the clinical applications in regenerative medicine.
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Affiliation(s)
- Weiming Qiu
- Department of Dermatology, Wuhan General Hospital of Chinese People's Liberation Army, Wuhan, China
| | - Cheng-Ming Chuong
- Department of Pathology, University of Southern California, Los Angeles, California.,Integrative Stem Cell Center, China Medical University Hospital, China Medical University, Taichung, Taiwan
| | - Mingxing Lei
- Integrative Stem Cell Center, China Medical University Hospital, China Medical University, Taichung, Taiwan.,Institute of New Drug Development, College of Biopharmaceutical and Food Sciences, China Medical University, Taichung, Taiwan
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17
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Schanze I, Bunt J, Lim JWC, Schanze D, Dean RJ, Alders M, Blanchet P, Attié-Bitach T, Berland S, Boogert S, Boppudi S, Bridges CJ, Cho MT, Dobyns WB, Donnai D, Douglas J, Earl DL, Edwards TJ, Faivre L, Fregeau B, Genevieve D, Gérard M, Gatinois V, Holder-Espinasse M, Huth SF, Izumi K, Kerr B, Lacaze E, Lakeman P, Mahida S, Mirzaa GM, Morgan SM, Nowak C, Peeters H, Petit F, Pilz DT, Puechberty J, Reinstein E, Rivière JB, Santani AB, Schneider A, Sherr EH, Smith-Hicks C, Wieland I, Zackai E, Zhao X, Gronostajski RM, Zenker M, Richards LJ. NFIB Haploinsufficiency Is Associated with Intellectual Disability and Macrocephaly. Am J Hum Genet 2018; 103:752-768. [PMID: 30388402 PMCID: PMC6218805 DOI: 10.1016/j.ajhg.2018.10.006] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2018] [Accepted: 10/03/2018] [Indexed: 12/19/2022] Open
Abstract
The nuclear factor I (NFI) family of transcription factors play an important role in normal development of multiple organs. Three NFI family members are highly expressed in the brain, and deletions or sequence variants in two of these, NFIA and NFIX, have been associated with intellectual disability (ID) and brain malformations. NFIB, however, has not previously been implicated in human disease. Here, we present a cohort of 18 individuals with mild ID and behavioral issues who are haploinsufficient for NFIB. Ten individuals harbored overlapping microdeletions of the chromosomal 9p23-p22.2 region, ranging in size from 225 kb to 4.3 Mb. Five additional subjects had point sequence variations creating a premature termination codon, and three subjects harbored single-nucleotide variations resulting in an inactive protein as determined using an in vitro reporter assay. All individuals presented with additional variable neurodevelopmental phenotypes, including muscular hypotonia, motor and speech delay, attention deficit disorder, autism spectrum disorder, and behavioral abnormalities. While structural brain anomalies, including dysgenesis of corpus callosum, were variable, individuals most frequently presented with macrocephaly. To determine whether macrocephaly could be a functional consequence of NFIB disruption, we analyzed a cortex-specific Nfib conditional knockout mouse model, which is postnatally viable. Utilizing magnetic resonance imaging and histology, we demonstrate that Nfib conditional knockout mice have enlargement of the cerebral cortex but preservation of overall brain structure and interhemispheric connectivity. Based on our findings, we propose that haploinsufficiency of NFIB causes ID with macrocephaly.
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Affiliation(s)
- Ina Schanze
- Institute of Human Genetics, University Hospital Magdeburg, Otto-von-Guericke University, Magdeburg 39120, Germany
| | - Jens Bunt
- Queensland Brain Institute, The University of Queensland, Brisbane, QLD 4072, Australia.
| | - Jonathan W C Lim
- Queensland Brain Institute, The University of Queensland, Brisbane, QLD 4072, Australia
| | - Denny Schanze
- Institute of Human Genetics, University Hospital Magdeburg, Otto-von-Guericke University, Magdeburg 39120, Germany
| | - Ryan J Dean
- Queensland Brain Institute, The University of Queensland, Brisbane, QLD 4072, Australia
| | - Marielle Alders
- Department of Clinical Genetics, Academic Medical Center, University of Amsterdam, Amsterdam 1105 AZ, the Netherlands
| | - Patricia Blanchet
- INSERM U1183, Département de Génétique Médicale, Maladies Rares et Médecine Personnalisée, Génétique clinique, CHU Montpellier, Université Montpellier, Centre de référence anomalies du développement SORO, Montpellier 34295, France
| | - Tania Attié-Bitach
- INSERM U1163, Laboratory of Embryology and Genetics of Congenital Malformations, Paris Descartes University, Sorbonne Paris Cité and Imagine Institute, Paris 75015, France
| | - Siren Berland
- Department of Medical Genetics, Haukeland University Hospital, Bergen 5021, Norway
| | - Steven Boogert
- Institute of Human Genetics, University Hospital Magdeburg, Otto-von-Guericke University, Magdeburg 39120, Germany
| | - Sangamitra Boppudi
- Institute of Human Genetics, University Hospital Magdeburg, Otto-von-Guericke University, Magdeburg 39120, Germany
| | - Caitlin J Bridges
- Institute of Human Genetics, University Hospital Magdeburg, Otto-von-Guericke University, Magdeburg 39120, Germany
| | | | - William B Dobyns
- Department of Pediatrics (Genetics), University of Washington and Center for Integrative Brain Research, Seattle Children's Research Institute, Seattle, WA 98101, USA
| | - Dian Donnai
- Manchester Centre for Genomic Medicine, Manchester Academic Health Science Centre, Central Manchester University Hospitals NHS Foundation Trust; Division of Evolution and Genomic Sciences School of Biological Sciences, and University of Manchester, Manchester M13 9WL, UK
| | - Jessica Douglas
- Boston Children's Hospital - The Feingold Center, Waltham, MA 02115, USA
| | - Dawn L Earl
- Division of Genetic Medicine, Seattle Children's Hospital, Seattle, WA 98105, USA
| | - Timothy J Edwards
- Queensland Brain Institute, The University of Queensland, Brisbane, QLD 4072, Australia; The Faculty of Medicine Brisbane, The University of Queensland, Brisbane, QLD 4072, Australia
| | - Laurence Faivre
- UMR1231, Génétique des Anomalies du Développement, Université de Bourgogne, Dijon 21079, France; Centre de Génétique et Centre de Référence Anomalies du Développement et Syndromes Malformatifs de l'Interrégion Est et FHU TRANSLAD, Centre Hospitalier Universitaire Dijon, Dijon 21079, France
| | - Brieana Fregeau
- Department of Neurology, University of California, San Francisco, San Francisco, CA 94158, USA
| | - David Genevieve
- INSERM U1183, Département de Génétique Médicale, Maladies Rares et Médecine Personnalisée, Génétique clinique, CHU Montpellier, Université Montpellier, Centre de référence anomalies du développement SORO, Montpellier 34295, France
| | - Marion Gérard
- Service de Génétique, CHU de Caen - Hôpital Clémenceau, Caen Cedex 14000, France
| | - Vincent Gatinois
- INSERM U1183, Département de Génétique Médicale, Maladies Rares et Médecine Personnalisée, Génétique clinique, CHU Montpellier, Université Montpellier, Centre de référence anomalies du développement SORO, Montpellier 34295, France
| | - Muriel Holder-Espinasse
- Service de Génétique Clinique, Hôpital Jeanne de Flandre, CHU Lille, Lille 59000, France; Department of Clinical Genetics, Guy's Hospital, London SE1 9RT, UK
| | - Samuel F Huth
- Queensland Brain Institute, The University of Queensland, Brisbane, QLD 4072, Australia
| | - Kosuke Izumi
- Department of Pediatrics, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, PA 19104, USA; Division of Genetics, Department of Pediatrics, Children's Hospital of Philadelphia, Philadelphia, PA 19104, USA
| | - Bronwyn Kerr
- Manchester Centre for Genomic Medicine, Manchester Academic Health Science Centre, Central Manchester University Hospitals NHS Foundation Trust; Division of Evolution and Genomic Sciences School of Biological Sciences, and University of Manchester, Manchester M13 9WL, UK
| | - Elodie Lacaze
- Department of genetics, Le Havre Hospital, 76600 Le Havre, France
| | - Phillis Lakeman
- Department of Clinical Genetics, Academic Medical Center, University of Amsterdam, Amsterdam 1105 AZ, the Netherlands
| | - Sonal Mahida
- Department of Neurogenetics, Kennedy Krieger Institute, Baltimore, MD 21205, USA
| | - Ghayda M Mirzaa
- Department of Pediatrics (Genetics), University of Washington and Center for Integrative Brain Research, Seattle Children's Research Institute, Seattle, WA 98101, USA
| | - Sian M Morgan
- All Wales Genetics Laboratory, Institute of Medical Genetics, University Hospital of Wales, Cardiff CF14 4XW, UK
| | - Catherine Nowak
- Boston Children's Hospital - The Feingold Center, Waltham, MA 02115, USA
| | - Hilde Peeters
- Center for Human Genetics, University Hospital Leuven, KU Leuven, Leuven 3000, Belgium
| | - Florence Petit
- Service de Génétique Clinique, Hôpital Jeanne de Flandre, CHU Lille, Lille 59000, France
| | - Daniela T Pilz
- West of Scotland Genetics Service, Queen Elizabeth University Hospital, Glasgow G51 4TF, UK
| | - Jacques Puechberty
- INSERM U1183, Département de Génétique Médicale, Maladies Rares et Médecine Personnalisée, Génétique clinique, CHU Montpellier, Université Montpellier, Centre de référence anomalies du développement SORO, Montpellier 34295, France
| | - Eyal Reinstein
- Medical Genetics Institute, Meir Medical Center, Kfar-Saba 4428164, Israel; Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv 6997801, Israel
| | - Jean-Baptiste Rivière
- UMR1231, Génétique des Anomalies du Développement, Université de Bourgogne, Dijon 21079, France; Centre de Génétique et Centre de Référence Anomalies du Développement et Syndromes Malformatifs de l'Interrégion Est et FHU TRANSLAD, Centre Hospitalier Universitaire Dijon, Dijon 21079, France; Child Health and Human Development Program, Research Institute of the McGill University Health Centre, Montreal, QC H4A 3J1, Canada
| | - Avni B Santani
- Division of Genomic Diagnostics, Children's Hospital of Philadelphia, Philadelphia, PA 19104, USA; Department of Pathology and Laboratory Medicine, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA
| | - Anouck Schneider
- INSERM U1183, Département de Génétique Médicale, Maladies Rares et Médecine Personnalisée, Génétique clinique, CHU Montpellier, Université Montpellier, Centre de référence anomalies du développement SORO, Montpellier 34295, France
| | - Elliott H Sherr
- Department of Neurology, University of California, San Francisco, San Francisco, CA 94158, USA
| | | | - Ilse Wieland
- Institute of Human Genetics, University Hospital Magdeburg, Otto-von-Guericke University, Magdeburg 39120, Germany
| | - Elaine Zackai
- Department of Pediatrics, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, PA 19104, USA
| | - Xiaonan Zhao
- Division of Genomic Diagnostics, Children's Hospital of Philadelphia, Philadelphia, PA 19104, USA
| | - Richard M Gronostajski
- Department of Biochemistry, Program in Genetics, Genomics and Bioinformatics, Center of Excellence in Bioinformatics and Life Sciences, State University of New York at Buffalo, Buffalo, NY 14203, USA
| | - Martin Zenker
- Institute of Human Genetics, University Hospital Magdeburg, Otto-von-Guericke University, Magdeburg 39120, Germany.
| | - Linda J Richards
- Queensland Brain Institute, The University of Queensland, Brisbane, QLD 4072, Australia; School of Biomedical Sciences, The Faculty of Medicine Brisbane, The University of Queensland, Brisbane, QLD 4072, Australia
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18
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An integrative transcriptome analysis reveals a functional role for thyroid transcription factor-1 in small cell lung cancer. J Pathol 2018; 246:154-165. [DOI: 10.1002/path.5109] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2017] [Revised: 05/28/2018] [Accepted: 06/01/2018] [Indexed: 12/31/2022]
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19
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Kumar VHS, Chaker El Khoury J, Gronostajski R, Wang H, Nielsen L, Ryan RM. Nfib hemizygous mice are protected from hyperoxic lung injury and death. Physiol Rep 2018; 5:5/16/e13398. [PMID: 28830981 PMCID: PMC5582271 DOI: 10.14814/phy2.13398] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2017] [Revised: 07/22/2017] [Accepted: 07/28/2017] [Indexed: 12/17/2022] Open
Abstract
Nuclear Factor I (Nfi) genes encode transcription factors essential for the development of organ systems including the lung. Nfib null mice die at birth with immature lungs. Nfib hemizygous mice have reduced lung maturation with decreased survival. We therefore hypothesized that these mice would be more sensitive to lung injury and would have lower survival to hyperoxia. Adult Nfib hemizygous mice and their wild-type (Wt) littermates were exposed to 100% O2 for 89, 80, 72 and 66 h for survival studies with lung outcome measurements at 66 h. Nfib hemizygous and Wt controls were also studied in RA at 66 h. Cell counts and cytokines were measured in bronchoalveolar lavage (BAL); lung sections examined by histopathology; lung angiogenic and oxidative stress gene expression assessed by real-time PCR Unexpectedly, Nfib hemizygous mice (0/14-0%) had significantly lower mortality compared to Wt mice (10/22-45%) at 80 h of hyperoxia (P < 0.003). LD50 was 80 h in the Wt group versus 89 h in the hemizygous group. There were no differences in BAL cell counts between the groups. Among the cytokines studied, MIP-2 was significantly lower in hemizygous mice exposed to hyperoxia. New vessel formation, edema, congestion, and alveolar hemorrhage were noted on histopathology at 72 and 80 h in wild-type mice. Nfib hemizygous lungs had significant downregulation of genes involved in redox signaling and inflammatory pathways. Adult Nfib hemizygous mice are relatively resistant to hyperoxia compared to wild-type littermates. Mechanisms contributing to this resistance are not clear; however, transcription factors such as Nfib may regulate cell survival and play a role in modulating postnatal lung development.
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Affiliation(s)
| | | | - Richard Gronostajski
- Departments of Biochemistry and Developmental Genomics & Genetics, Genomics & Bioinformatics Program, University at Buffalo, Buffalo, New York
| | - Huamei Wang
- Department of Pediatrics, University at Buffalo, Buffalo, New York
| | - Lori Nielsen
- Department of Pediatrics, University at Buffalo, Buffalo, New York
| | - Rita M Ryan
- Department of Pediatrics, Medical University of South Carolina, Charleston, South Carolina
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20
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Yang B, Zhou ZH, Chen L, Cui X, Hou JY, Fan KJ, Han SH, Li P, Yi SQ, Liu Y. Prognostic significance of NFIA and NFIB in esophageal squamous carcinoma and esophagogastric junction adenocarcinoma. Cancer Med 2018; 7:1756-1765. [PMID: 29577671 PMCID: PMC5943462 DOI: 10.1002/cam4.1434] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2017] [Revised: 02/09/2018] [Accepted: 02/17/2018] [Indexed: 12/12/2022] Open
Abstract
The nuclear factor I (NFI) family members, especially NFIA and NFIB, play essential roles in cancers. The roles of NFIA and NFIB in esophageal squamous cell carcinoma (ESCC) and esophagogastric junction adenocarcinoma (EJA) remain poorly known. This study aimed to determine the expression of NFIA and NFIB in ESCC and EJA and elucidate their prognostic significance. The expression of NFIA and NFIB was examined in 163 ESCC samples and 26 EJA samples by immunohistochemistry. The results showed that high NFIA expression correlated significantly with poor differentiation, lymph node metastasis, and advanced TNM stage in patients with ESCC. High NFIB expression only correlated with poor differentiation in patients with ESCC. Survival analysis showed that NFIA but not NFIB associated with short overall survival (OS) and disease‐free survival (DFS) of patients with ESCC. On the other hand, high NFIB expression correlated with lymph node metastasis, advanced TNM stage, and short OS and DFS in patients with EJA. Finally, multivariate analysis demonstrated that high NFIA expression was an independent prognostic factor for ESCC. Taken together, these results demonstrated that NFIA and NFIB could serve as prognostic indicators for ESCC and EJA, respectively.
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Affiliation(s)
- Bo Yang
- Department of General Thoracic Surgery, The General Hospital of PLA, Beijing, China
| | - Zhi-Hang Zhou
- Department of Digestive Disease, the Second affiliated hospital of Chongqing Medical University, Chongqing, China
| | - Li Chen
- Department of Emergency, The General Hospital of PLA, Beijing, China
| | - Xiang Cui
- Department of Orthopedics, The General Hospital of PLA, Beijing, China
| | - Jun-Yan Hou
- The Medico-technical Division, The General Hospital of PLA, Beijing, China
| | - Kai-Jie Fan
- Department of General Thoracic Surgery, The General Hospital of PLA, Beijing, China
| | - Si-Hao Han
- Harvard T.H.Chan School of Public Health, Boston, Massachusetts
| | - Peng Li
- Department of General Surgery, The General Hospital of PLA, Beijing, China
| | - Shao-Qiong Yi
- Department of General Thoracic Surgery, The General Hospital of PLA, Beijing, China
| | - Yang Liu
- Department of General Thoracic Surgery, The General Hospital of PLA, Beijing, China
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21
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Keysar SB, Eagles JR, Miller B, Jackson BC, Chowdhury FN, Reisinger J, Chimed TS, Le PN, Morton JJ, Somerset HL, Varella-Garcia M, Tan AC, Song JI, Bowles DW, Reyland ME, Jimeno A. Salivary Gland Cancer Patient-Derived Xenografts Enable Characterization of Cancer Stem Cells and New Gene Events Associated with Tumor Progression. Clin Cancer Res 2018; 24:2935-2943. [PMID: 29555661 DOI: 10.1158/1078-0432.ccr-17-3871] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/01/2018] [Revised: 02/12/2018] [Accepted: 03/14/2018] [Indexed: 02/07/2023]
Abstract
Purpose: Salivary gland cancers (SGC) frequently present with distant metastases many years after diagnosis, suggesting a cancer stem cell (CSC) subpopulation that initiates late recurrences; however, current models are limited both in their availability and suitability to characterize these rare cells.Experimental Design: Patient-derived xenografts (PDX) were generated by engrafting patient tissue onto nude mice from one acinic cell carcinoma (AciCC), four adenoid cystic carcinoma (ACC), and three mucoepidermoid carcinoma (MEC) cases, which were derived from successive relapses from the same MEC patient. Patient and PDX samples were analyzed by RNA-seq and Exome-seq. Sphere formation potential and in vivo tumorigenicity was assessed by sorting for Aldefluor (ALDH) activity and CD44-expressing subpopulations.Results: For successive MEC relapses we found a time-dependent increase in CSCs (ALDH+CD44high), increasing from 0.2% to 4.5% (P=0.033), but more importantly we observed an increase in individual CSC sphere formation and tumorigenic potential. A 50% increase in mutational burden was documented in subsequent MEC tumors, and this was associated with increased expression of tumor-promoting genes (MT1E, LGR5, and LEF1), decreased expression of tumor-suppressor genes (CDKN2B, SIK1, and TP53), and higher expression of CSC-related proteins such as SOX2, MYC, and ALDH1A1. Finally, genomic analyses identified a novel NFIB-MTFR2 fusion in an ACC tumor and confirmed previously reported fusions (NTRK3-ETV6 and MYB-NFIB)Conclusions: Sequential MEC PDX models preserved key patient features and enabled the identification of genetic events putatively contributing to increases in both CSC proportion and intrinsic tumorigenicity, which mirrored the patient's clinical course. Clin Cancer Res; 24(12); 2935-43. ©2018 AACR.
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Affiliation(s)
- Stephen B Keysar
- Division of Medical Oncology, Department of Medicine, University of Colorado Denver School of Medicine (UCDSOM), Denver, Colorado
| | - Justin R Eagles
- Division of Medical Oncology, Department of Medicine, University of Colorado Denver School of Medicine (UCDSOM), Denver, Colorado
| | - Bettina Miller
- Division of Medical Oncology, Department of Medicine, University of Colorado Denver School of Medicine (UCDSOM), Denver, Colorado
| | - Brian C Jackson
- Division of Medical Oncology, Department of Medicine, University of Colorado Denver School of Medicine (UCDSOM), Denver, Colorado
| | | | - Julie Reisinger
- Division of Medical Oncology, Department of Medicine, University of Colorado Denver School of Medicine (UCDSOM), Denver, Colorado
| | - Tugs-Saikhan Chimed
- Division of Medical Oncology, Department of Medicine, University of Colorado Denver School of Medicine (UCDSOM), Denver, Colorado
| | - Phuong N Le
- Division of Medical Oncology, Department of Medicine, University of Colorado Denver School of Medicine (UCDSOM), Denver, Colorado
| | - John J Morton
- Division of Medical Oncology, Department of Medicine, University of Colorado Denver School of Medicine (UCDSOM), Denver, Colorado
| | | | - Marileila Varella-Garcia
- Division of Medical Oncology, Department of Medicine, University of Colorado Denver School of Medicine (UCDSOM), Denver, Colorado
| | - Aik-Choon Tan
- Division of Medical Oncology, Department of Medicine, University of Colorado Denver School of Medicine (UCDSOM), Denver, Colorado.,Department of Biostatistics and Informatics, University of Colorado School of Public Health, Denver, Colorado
| | - John I Song
- Department of Otolaryngology, UCDSOM, Denver, Colorado
| | - Daniel W Bowles
- Division of Medical Oncology, Department of Medicine, University of Colorado Denver School of Medicine (UCDSOM), Denver, Colorado
| | - Mary E Reyland
- Department of Craniofacial Biology, University of Colorado Denver School of Dental Medicine, Denver, Colorado
| | - Antonio Jimeno
- Division of Medical Oncology, Department of Medicine, University of Colorado Denver School of Medicine (UCDSOM), Denver, Colorado. .,Department of Otolaryngology, UCDSOM, Denver, Colorado.,Gates Center for Regenerative Medicine, UCDSOM, Denver, Colorado
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22
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Wu N, Jia D, Ibrahim AH, Bachurski CJ, Gronostajski RM, MacPherson D. NFIB overexpression cooperates with Rb/p53 deletion to promote small cell lung cancer. Oncotarget 2018; 7:57514-57524. [PMID: 27613844 PMCID: PMC5295369 DOI: 10.18632/oncotarget.11583] [Citation(s) in RCA: 52] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2016] [Accepted: 08/20/2016] [Indexed: 11/25/2022] Open
Abstract
Small cell lung cancer (SCLC) is a highly aggressive neuroendocrine tumor type that is typically metastatic upon diagnosis. We have a poor understanding of the factors that control SCLC progression and metastasis. TheNFIB transcription factor is frequently amplified in mouse models of SCLC, but clear evidence that NFIB promotes SCLC in vivo is lacking. We report that in mouse models, Nfib amplifications are far more frequent in liver metastases over primary SCLC, suggesting roles in tumor progression/metastasis. Overexpression of Nfib in a sensitized mouse model led to acceleration of SCLC, indicating that Nfib functions as a bona fide oncogene. Suppression of Nfib expression in cell lines derived from the doxycycline-inducible Rb/p53/TET-Nfib model led to increased apoptosis and suppression of proliferation. Transcriptional analysis revealed that Nfib regulates the expression of genes related to axon guidance, focal adhesion and extracellular matrix-receptor interactions. These data indicate that Nfib is a potent oncogene in SCLC, and the enrichment of Nfib amplifications in liver metastases over primary SCLC points to Nfib as a candidate driver of SCLC metastasis.
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Affiliation(s)
- Nan Wu
- Divisions of Human Biology and Public Health Sciences, Fred Hutchinson Cancer Research Center, Seattle, WA, USA
| | - Deshui Jia
- Divisions of Human Biology and Public Health Sciences, Fred Hutchinson Cancer Research Center, Seattle, WA, USA
| | - Ali H Ibrahim
- Divisions of Human Biology and Public Health Sciences, Fred Hutchinson Cancer Research Center, Seattle, WA, USA
| | - Cindy J Bachurski
- Division of Pulmonary Biology, Cincinnati Children's Hospital Research Foundation, Cincinnati, OH, USA
| | - Richard M Gronostajski
- Department of Biochemistry, Program in Genetics, Genomics & Bioinformatics, University at Buffalo, Buffalo, NY, USA
| | - David MacPherson
- Divisions of Human Biology and Public Health Sciences, Fred Hutchinson Cancer Research Center, Seattle, WA, USA.,Department of Genome Sciences, University of Washington, Seattle, WA, USA
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23
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The convergent roles of the nuclear factor I transcription factors in development and cancer. Cancer Lett 2017; 410:124-138. [PMID: 28962832 DOI: 10.1016/j.canlet.2017.09.015] [Citation(s) in RCA: 57] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2017] [Revised: 09/11/2017] [Accepted: 09/16/2017] [Indexed: 02/07/2023]
Abstract
The nuclear factor I (NFI) transcription factors play important roles during normal development and have been associated with developmental abnormalities in humans. All four family members, NFIA, NFIB, NFIC and NFIX, have a homologous DNA binding domain and function by regulating cell proliferation and differentiation via the transcriptional control of their target genes. More recently, NFI genes have also been implicated in cancer based on genomic analyses and studies of animal models in a variety of tumours across multiple organ systems. However, the association between their functions in development and in cancer is not well described. In this review, we summarise the evidence suggesting a converging role for the NFI genes in development and cancer. Our review includes all cancer types in which the NFI genes are implicated, focusing predominantly on studies demonstrating their oncogenic or tumour-suppressive potential. We conclude by presenting the challenges impeding our understanding of NFI function in cancer biology, and demonstrate how a developmental perspective may contribute towards overcoming such hurdles.
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24
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Rapid Discovery of De Novo Deleterious Mutations in Cattle Enhances the Value of Livestock as Model Species. Sci Rep 2017; 7:11466. [PMID: 28904385 PMCID: PMC5597596 DOI: 10.1038/s41598-017-11523-3] [Citation(s) in RCA: 50] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2016] [Accepted: 08/23/2017] [Indexed: 01/17/2023] Open
Abstract
In humans, the clinical and molecular characterization of sporadic syndromes is often hindered by the small number of patients and the difficulty in developing animal models for severe dominant conditions. Here we show that the availability of large data sets of whole-genome sequences, high-density SNP chip genotypes and extensive recording of phenotype offers an unprecedented opportunity to quickly dissect the genetic architecture of severe dominant conditions in livestock. We report on the identification of seven dominant de novo mutations in CHD7, COL1A1, COL2A1, COPA, and MITF and exploit the structure of cattle populations to describe their clinical consequences and map modifier loci. Moreover, we demonstrate that the emergence of recessive genetic defects can be monitored by detecting de novo deleterious mutations in the genome of bulls used for artificial insemination. These results demonstrate the attractiveness of cattle as a model species in the post genomic era, particularly to confirm the genetic aetiology of isolated clinical case reports in humans.
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25
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Wu Y, Zhang J, Hou S, Cheng Z, Yuan M. Non-small cell lung cancer: miR-30d suppresses tumor invasion and migration by directly targeting NFIB. Biotechnol Lett 2017; 39:1827-1834. [DOI: 10.1007/s10529-017-2428-9] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2017] [Accepted: 08/22/2017] [Indexed: 12/13/2022]
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26
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Shin HY, Wang C, Lee HK, Yoo KH, Zeng X, Kuhns T, Yang CM, Mohr T, Liu C, Hennighausen L. CRISPR/Cas9 targeting events cause complex deletions and insertions at 17 sites in the mouse genome. Nat Commun 2017; 8:15464. [PMID: 28561021 PMCID: PMC5460021 DOI: 10.1038/ncomms15464] [Citation(s) in RCA: 207] [Impact Index Per Article: 29.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2016] [Accepted: 03/31/2017] [Indexed: 12/29/2022] Open
Abstract
Although CRISPR/Cas9 genome editing has provided numerous opportunities to interrogate the functional significance of any given genomic site, there is a paucity of data on the extent of molecular scars inflicted on the mouse genome. Here we interrogate the molecular consequences of CRISPR/Cas9-mediated deletions at 17 sites in four loci of the mouse genome. We sequence targeted sites in 632 founder mice and analyse 54 established lines. While the median deletion size using single sgRNAs is 9 bp, we also obtain large deletions of up to 600 bp. Furthermore, we show unreported asymmetric deletions and large insertions of middle repetitive sequences. Simultaneous targeting of distant loci results in the removal of the intervening sequences. Reliable deletion of juxtaposed sites is only achieved through two-step targeting. Our findings also demonstrate that an extended analysis of F1 genotypes is required to obtain conclusive information on the exact molecular consequences of targeting events.
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Affiliation(s)
- Ha Youn Shin
- Laboratory of Genetics and Physiology, National Institute of Diabetes and Digestive and Kidney Diseases, US National Institutes of Health, Bethesda, Maryland 20892, USA
- Department of Biomedical Science and Engineering, Konkuk University, Seoul 05029, Republic of Korea
| | - Chaochen Wang
- Laboratory of Genetics and Physiology, National Institute of Diabetes and Digestive and Kidney Diseases, US National Institutes of Health, Bethesda, Maryland 20892, USA
| | - Hye Kyung Lee
- Laboratory of Genetics and Physiology, National Institute of Diabetes and Digestive and Kidney Diseases, US National Institutes of Health, Bethesda, Maryland 20892, USA
- Department of Cell and Developmental Biology & Dental Research Institute, Seoul National University, Seoul 110-749, Republic of Korea
| | - Kyung Hyun Yoo
- Laboratory of Genetics and Physiology, National Institute of Diabetes and Digestive and Kidney Diseases, US National Institutes of Health, Bethesda, Maryland 20892, USA
- Department of Life Systems, Sookmyung Women's University, Seoul 140-742, Republic of Korea
| | - Xianke Zeng
- Laboratory of Genetics and Physiology, National Institute of Diabetes and Digestive and Kidney Diseases, US National Institutes of Health, Bethesda, Maryland 20892, USA
| | - Tyler Kuhns
- Laboratory of Genetics and Physiology, National Institute of Diabetes and Digestive and Kidney Diseases, US National Institutes of Health, Bethesda, Maryland 20892, USA
| | - Chul Min Yang
- Laboratory of Genetics and Physiology, National Institute of Diabetes and Digestive and Kidney Diseases, US National Institutes of Health, Bethesda, Maryland 20892, USA
| | - Teresa Mohr
- Laboratory of Genetics and Physiology, National Institute of Diabetes and Digestive and Kidney Diseases, US National Institutes of Health, Bethesda, Maryland 20892, USA
| | - Chengyu Liu
- Transgenic Core, National Heart, Lung, and Blood Institute, US National Institutes of Health, Bethesda, Maryland 20892, USA
| | - Lothar Hennighausen
- Laboratory of Genetics and Physiology, National Institute of Diabetes and Digestive and Kidney Diseases, US National Institutes of Health, Bethesda, Maryland 20892, USA
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27
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Roh SY, Park JC. The role of nuclear factor I-C in tooth and bone development. J Korean Assoc Oral Maxillofac Surg 2017; 43:63-69. [PMID: 28462188 PMCID: PMC5410429 DOI: 10.5125/jkaoms.2017.43.2.63] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2017] [Accepted: 04/06/2017] [Indexed: 01/15/2023] Open
Abstract
Nuclear factor I-C (NFI-C) plays a pivotal role in various cellular processes such as odontoblast and osteoblast differentiation. Nfic-deficient mice showed abnormal tooth and bone formation. The transplantation of Nfic-expressing mouse bone marrow stromal cells rescued the impaired bone formation in Nfic-/- mice. Studies suggest that NFI-C regulate osteogenesis and dentinogenesis in concert with several factors including transforming growth factor-β1, Krüppel-like factor 4, and β-catenin. This review will focus on the function of NFI-C during tooth and bone formation and on the relevant pathways that involve NFI-C.
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Affiliation(s)
- Song Yi Roh
- Department of Oral Histology-Developmental Biology and Dental Research Institute, School of Dentistry, Seoul National University, Seoul, Korea
| | - Joo-Cheol Park
- Department of Oral Histology-Developmental Biology and Dental Research Institute, School of Dentistry, Seoul National University, Seoul, Korea
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28
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NFIB Mediates BRN2 Driven Melanoma Cell Migration and Invasion Through Regulation of EZH2 and MITF. EBioMedicine 2017; 16:63-75. [PMID: 28119061 PMCID: PMC5474438 DOI: 10.1016/j.ebiom.2017.01.013] [Citation(s) in RCA: 64] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2016] [Revised: 12/23/2016] [Accepted: 01/09/2017] [Indexed: 11/21/2022] Open
Abstract
While invasion and metastasis of tumour cells are the principle factor responsible for cancer related deaths, the mechanisms governing the process remain poorly defined. Moreover, phenotypic divergence of sub-populations of tumour cells is known to underpin alternative behaviors linked to tumour progression such as proliferation, survival and invasion. In the context of melanoma, heterogeneity between two transcription factors, BRN2 and MITF, has been associated with phenotypic switching between predominantly invasive and proliferative behaviors respectively. Epigenetic changes, in response to external cues, have been proposed to underpin this process, however the mechanism by which the phenotypic switch occurs is unclear. Here we report the identification of the NFIB transcription factor as a novel downstream effector of BRN2 function in melanoma cells linked to the migratory and invasive characteristics of these cells. Furthermore, the function of NFIB appears to drive an invasive phenotype through an epigenetic mechanism achieved via the upregulation of the polycomb group protein EZH2. A notable target of NFIB mediated up-regulation of EZH2 is decreased MITF expression, which further promotes a less proliferative, more invasive phenotype. Together our data reveal that NFIB has the ability to promote dynamic changes in the chromatin state of melanoma cells to facilitate migration, invasion and metastasis. NFIB mediates a slow cycling, highly invasive/migratory melanoma cell phenotype downstream of BRN2. NFIB increases EZH2 expression downstream of BRN2, which further decreases MITF levels. NFIB expression is defined by an invasive gene signature and colocalises with BRN2 in primary and metastatic human melanoma tumours.
Melanoma is a heterogeneous cancer, made up of many cellular populations that differ in their ability to induce tumour growth or invasion throughout the body (metastasis). These populations have been found to switch back and forth to drive invasion and progression. This process appears to be controlled by an inverse axis between two genes, MITF and BRN2. BRN2 drives metastatic spread, but the process by which it acts is not well characterized and cannot be targeted clinically. This study has uncovered a role for the gene NFIB in driving invasion downstream of BRN2. Importantly, it appears to drive this process through EZH2, which can be targeted therapeutically to reduce metastasis.
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29
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Cell-type-specific expression of NFIX in the developing and adult cerebellum. Brain Struct Funct 2016; 222:2251-2270. [PMID: 27878595 DOI: 10.1007/s00429-016-1340-8] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2016] [Accepted: 11/16/2016] [Indexed: 12/13/2022]
Abstract
Transcription factors from the nuclear factor one (NFI) family have been shown to play a central role in regulating neural progenitor cell differentiation within the embryonic and post-natal brain. NFIA and NFIB, for instance, promote the differentiation and functional maturation of granule neurons within the cerebellum. Mice lacking Nfix exhibit delays in the development of neuronal and glial lineages within the cerebellum, but the cell-type-specific expression of this transcription factor remains undefined. Here, we examined the expression of NFIX, together with various cell-type-specific markers, within the developing and adult cerebellum using both chromogenic immunohistochemistry and co-immunofluorescence labelling and confocal microscopy. In embryos, NFIX was expressed by progenitor cells within the rhombic lip and ventricular zone. After birth, progenitor cells within the external granule layer, as well as migrating and mature granule neurons, expressed NFIX. Within the adult cerebellum, NFIX displayed a broad expression profile, and was evident within granule cells, Bergmann glia, and interneurons, but not within Purkinje neurons. Furthermore, transcriptomic profiling of cerebellar granule neuron progenitor cells showed that multiple splice variants of Nfix are expressed within this germinal zone of the post-natal brain. Collectively, these data suggest that NFIX plays a role in regulating progenitor cell biology within the embryonic and post-natal cerebellum, as well as an ongoing role within multiple neuronal and glial populations within the adult cerebellum.
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30
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Becker-Santos DD, Thu KL, English JC, Pikor LA, Martinez VD, Zhang M, Vucic EA, Luk MT, Carraro A, Korbelik J, Piga D, Lhomme NM, Tsay MJ, Yee J, MacAulay CE, Lam S, Lockwood WW, Robinson WP, Jurisica I, Lam WL. Developmental transcription factor NFIB is a putative target of oncofetal miRNAs and is associated with tumour aggressiveness in lung adenocarcinoma. J Pathol 2016; 240:161-72. [PMID: 27357447 DOI: 10.1002/path.4765] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2015] [Revised: 05/16/2016] [Accepted: 06/06/2016] [Indexed: 12/28/2022]
Abstract
Genes involved in fetal lung development are thought to play crucial roles in the malignant transformation of adult lung cells. Consequently, the study of lung tumour biology in the context of lung development has the potential to reveal key developmentally relevant genes that play critical roles in lung cancer initiation/progression. Here, we describe for the first time a comprehensive characterization of miRNA expression in human fetal lung tissue, with subsequent identification of 37 miRNAs in non-small cell lung cancer (NSCLC) that recapitulate their fetal expression patterns. Nuclear factor I/B (NFIB), a transcription factor essential for lung development, was identified as a potential frequent target for these 'oncofetal' miRNAs. Concordantly, analysis of NFIB expression in multiple NSCLC independent cohorts revealed its recurrent underexpression (in ∼40-70% of tumours). Interrogation of NFIB copy number, methylation, and mutation status revealed that DNA level disruption of this gene is rare, and further supports the notion that oncofetal miRNAs are likely the primary mechanism responsible for NFIB underexpression in NSCLC. Reflecting its functional role in regulating lung differentiation, low expression of NFIB was significantly associated with biologically more aggressive subtypes and, ultimately, poorer survival in lung adenocarcinoma patients. Copyright © 2016 Pathological Society of Great Britain and Ireland. Published by John Wiley & Sons, Ltd.
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Affiliation(s)
- Daiana D Becker-Santos
- Department of Integrative Oncology, British Columbia Cancer Research Centre, Vancouver, British Columbia, Canada.
| | - Kelsie L Thu
- Department of Integrative Oncology, British Columbia Cancer Research Centre, Vancouver, British Columbia, Canada
| | - John C English
- Department of Pathology, Vancouver General Hospital, Vancouver, British Columbia, Canada
| | - Larissa A Pikor
- Department of Integrative Oncology, British Columbia Cancer Research Centre, Vancouver, British Columbia, Canada
| | - Victor D Martinez
- Department of Integrative Oncology, British Columbia Cancer Research Centre, Vancouver, British Columbia, Canada
| | - May Zhang
- Department of Integrative Oncology, British Columbia Cancer Research Centre, Vancouver, British Columbia, Canada
| | - Emily A Vucic
- Department of Integrative Oncology, British Columbia Cancer Research Centre, Vancouver, British Columbia, Canada
| | - Margaret Ty Luk
- Department of Pathology, Vancouver General Hospital, Vancouver, British Columbia, Canada
| | - Anita Carraro
- Department of Integrative Oncology, British Columbia Cancer Research Centre, Vancouver, British Columbia, Canada
| | - Jagoda Korbelik
- Department of Integrative Oncology, British Columbia Cancer Research Centre, Vancouver, British Columbia, Canada
| | - Daniela Piga
- Department of Integrative Oncology, British Columbia Cancer Research Centre, Vancouver, British Columbia, Canada
| | - Nicolas M Lhomme
- Department of Integrative Oncology, British Columbia Cancer Research Centre, Vancouver, British Columbia, Canada
| | - Mike J Tsay
- Princess Margaret Cancer Centre, University Health Network, Toronto, Ontario, Canada
| | - John Yee
- Department of Surgery, Vancouver General Hospital, Vancouver, British Columbia, Canada
| | - Calum E MacAulay
- Department of Integrative Oncology, British Columbia Cancer Research Centre, Vancouver, British Columbia, Canada
| | - Stephen Lam
- Department of Integrative Oncology, British Columbia Cancer Research Centre, Vancouver, British Columbia, Canada
| | - William W Lockwood
- Department of Integrative Oncology, British Columbia Cancer Research Centre, Vancouver, British Columbia, Canada
| | - Wendy P Robinson
- Department of Medical Genetics, University of British Columbia, Vancouver, British Columbia, Canada
| | - Igor Jurisica
- Princess Margaret Cancer Centre, University Health Network, Toronto, Ontario, Canada.,Departments of Medical Biophysics and Computer Science, University of Toronto, Toronto, Ontario, Canada
| | - Wan L Lam
- Department of Integrative Oncology, British Columbia Cancer Research Centre, Vancouver, British Columbia, Canada
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31
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Grabowska MM, Kelly SM, Reese AL, Cates JM, Case TC, Zhang J, DeGraff DJ, Strand DW, Miller NL, Clark PE, Hayward SW, Gronostajski RM, Anderson PD, Matusik RJ. Nfib Regulates Transcriptional Networks That Control the Development of Prostatic Hyperplasia. Endocrinology 2016; 157:1094-109. [PMID: 26677878 PMCID: PMC4769366 DOI: 10.1210/en.2015-1312] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
A functional complex consisting of androgen receptor (AR) and forkhead box A1 (FOXA1) proteins supports prostatic development, differentiation, and disease. In addition, the interaction of FOXA1 with cofactors such as nuclear factor I (NFI) family members modulates AR target gene expression. However, the global role of specific NFI family members has yet to be described in the prostate. In these studies, chromatin immunoprecipitation followed by DNA sequencing in androgen-dependent LNCaP prostate cancer cells demonstrated that 64.3% of NFIB binding sites are associated with AR and FOXA1 binding sites. Interrogation of published data revealed that genes associated with NFIB binding sites are predominantly induced after dihydrotestosterone treatment of LNCaP cells, whereas NFIB knockdown studies demonstrated that loss of NFIB drives increased AR expression and superinduction of a subset of AR target genes. Notably, genes bound by NFIB only are associated with cell division and cell cycle. To define the role of NFIB in vivo, mouse Nfib knockout prostatic tissue was rescued via renal capsule engraftment. Loss of Nfib expression resulted in prostatic hyperplasia, which did not resolve in response to castration, and an expansion of an intermediate cell population in a small subset of grafts. In human benign prostatic hyperplasia, luminal NFIB loss correlated with more severe disease. Finally, some areas of intermediate cell expansion were also associated with NFIB loss. Taken together, these results show a fundamental role for NFIB as a coregulator of AR action in the prostate and in controlling prostatic hyperplasia.
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Affiliation(s)
- Magdalena M Grabowska
- Department of Urologic Surgery (M.M.G., T.C.C., J.Z., N.L.M., P.E.C., S.W.H., R.J.M.), Department of Pathology, Microbiology, and Immunology (J.M.C.), and Vanderbilt-Ingram Cancer Center (P.E.C., R.J.M.), Vanderbilt University Medical Center, Nashville, Tennessee 37232; Department of Biological Sciences (S.M.K., A.L.R., P.D.A.), Salisbury University, Salisbury, Maryland 21801; Department of Pathology (D.J.G.), Penn State University College of Medicine, Hershey, Pennsylvania 17033; Department of Urology (D.W.S.), University of Texas Southwestern Medical Center, Dallas, Texas 75390; Department of Cancer Biology (S.W.H.), NorthShore HealthSystem Research Institute, Evanston, Illinois 60201; Department of Biochemistry, Genetics, Genomics and Bioinformatics Program (R.M.G.), University at Buffalo, Buffalo, New York 14203; and Department of Cell and Developmental Biology (R.J.M.), Vanderbilt University, Nashville, Tennessee 37235
| | - Stephen M Kelly
- Department of Urologic Surgery (M.M.G., T.C.C., J.Z., N.L.M., P.E.C., S.W.H., R.J.M.), Department of Pathology, Microbiology, and Immunology (J.M.C.), and Vanderbilt-Ingram Cancer Center (P.E.C., R.J.M.), Vanderbilt University Medical Center, Nashville, Tennessee 37232; Department of Biological Sciences (S.M.K., A.L.R., P.D.A.), Salisbury University, Salisbury, Maryland 21801; Department of Pathology (D.J.G.), Penn State University College of Medicine, Hershey, Pennsylvania 17033; Department of Urology (D.W.S.), University of Texas Southwestern Medical Center, Dallas, Texas 75390; Department of Cancer Biology (S.W.H.), NorthShore HealthSystem Research Institute, Evanston, Illinois 60201; Department of Biochemistry, Genetics, Genomics and Bioinformatics Program (R.M.G.), University at Buffalo, Buffalo, New York 14203; and Department of Cell and Developmental Biology (R.J.M.), Vanderbilt University, Nashville, Tennessee 37235
| | - Amy L Reese
- Department of Urologic Surgery (M.M.G., T.C.C., J.Z., N.L.M., P.E.C., S.W.H., R.J.M.), Department of Pathology, Microbiology, and Immunology (J.M.C.), and Vanderbilt-Ingram Cancer Center (P.E.C., R.J.M.), Vanderbilt University Medical Center, Nashville, Tennessee 37232; Department of Biological Sciences (S.M.K., A.L.R., P.D.A.), Salisbury University, Salisbury, Maryland 21801; Department of Pathology (D.J.G.), Penn State University College of Medicine, Hershey, Pennsylvania 17033; Department of Urology (D.W.S.), University of Texas Southwestern Medical Center, Dallas, Texas 75390; Department of Cancer Biology (S.W.H.), NorthShore HealthSystem Research Institute, Evanston, Illinois 60201; Department of Biochemistry, Genetics, Genomics and Bioinformatics Program (R.M.G.), University at Buffalo, Buffalo, New York 14203; and Department of Cell and Developmental Biology (R.J.M.), Vanderbilt University, Nashville, Tennessee 37235
| | - Justin M Cates
- Department of Urologic Surgery (M.M.G., T.C.C., J.Z., N.L.M., P.E.C., S.W.H., R.J.M.), Department of Pathology, Microbiology, and Immunology (J.M.C.), and Vanderbilt-Ingram Cancer Center (P.E.C., R.J.M.), Vanderbilt University Medical Center, Nashville, Tennessee 37232; Department of Biological Sciences (S.M.K., A.L.R., P.D.A.), Salisbury University, Salisbury, Maryland 21801; Department of Pathology (D.J.G.), Penn State University College of Medicine, Hershey, Pennsylvania 17033; Department of Urology (D.W.S.), University of Texas Southwestern Medical Center, Dallas, Texas 75390; Department of Cancer Biology (S.W.H.), NorthShore HealthSystem Research Institute, Evanston, Illinois 60201; Department of Biochemistry, Genetics, Genomics and Bioinformatics Program (R.M.G.), University at Buffalo, Buffalo, New York 14203; and Department of Cell and Developmental Biology (R.J.M.), Vanderbilt University, Nashville, Tennessee 37235
| | - Tom C Case
- Department of Urologic Surgery (M.M.G., T.C.C., J.Z., N.L.M., P.E.C., S.W.H., R.J.M.), Department of Pathology, Microbiology, and Immunology (J.M.C.), and Vanderbilt-Ingram Cancer Center (P.E.C., R.J.M.), Vanderbilt University Medical Center, Nashville, Tennessee 37232; Department of Biological Sciences (S.M.K., A.L.R., P.D.A.), Salisbury University, Salisbury, Maryland 21801; Department of Pathology (D.J.G.), Penn State University College of Medicine, Hershey, Pennsylvania 17033; Department of Urology (D.W.S.), University of Texas Southwestern Medical Center, Dallas, Texas 75390; Department of Cancer Biology (S.W.H.), NorthShore HealthSystem Research Institute, Evanston, Illinois 60201; Department of Biochemistry, Genetics, Genomics and Bioinformatics Program (R.M.G.), University at Buffalo, Buffalo, New York 14203; and Department of Cell and Developmental Biology (R.J.M.), Vanderbilt University, Nashville, Tennessee 37235
| | - Jianghong Zhang
- Department of Urologic Surgery (M.M.G., T.C.C., J.Z., N.L.M., P.E.C., S.W.H., R.J.M.), Department of Pathology, Microbiology, and Immunology (J.M.C.), and Vanderbilt-Ingram Cancer Center (P.E.C., R.J.M.), Vanderbilt University Medical Center, Nashville, Tennessee 37232; Department of Biological Sciences (S.M.K., A.L.R., P.D.A.), Salisbury University, Salisbury, Maryland 21801; Department of Pathology (D.J.G.), Penn State University College of Medicine, Hershey, Pennsylvania 17033; Department of Urology (D.W.S.), University of Texas Southwestern Medical Center, Dallas, Texas 75390; Department of Cancer Biology (S.W.H.), NorthShore HealthSystem Research Institute, Evanston, Illinois 60201; Department of Biochemistry, Genetics, Genomics and Bioinformatics Program (R.M.G.), University at Buffalo, Buffalo, New York 14203; and Department of Cell and Developmental Biology (R.J.M.), Vanderbilt University, Nashville, Tennessee 37235
| | - David J DeGraff
- Department of Urologic Surgery (M.M.G., T.C.C., J.Z., N.L.M., P.E.C., S.W.H., R.J.M.), Department of Pathology, Microbiology, and Immunology (J.M.C.), and Vanderbilt-Ingram Cancer Center (P.E.C., R.J.M.), Vanderbilt University Medical Center, Nashville, Tennessee 37232; Department of Biological Sciences (S.M.K., A.L.R., P.D.A.), Salisbury University, Salisbury, Maryland 21801; Department of Pathology (D.J.G.), Penn State University College of Medicine, Hershey, Pennsylvania 17033; Department of Urology (D.W.S.), University of Texas Southwestern Medical Center, Dallas, Texas 75390; Department of Cancer Biology (S.W.H.), NorthShore HealthSystem Research Institute, Evanston, Illinois 60201; Department of Biochemistry, Genetics, Genomics and Bioinformatics Program (R.M.G.), University at Buffalo, Buffalo, New York 14203; and Department of Cell and Developmental Biology (R.J.M.), Vanderbilt University, Nashville, Tennessee 37235
| | - Douglas W Strand
- Department of Urologic Surgery (M.M.G., T.C.C., J.Z., N.L.M., P.E.C., S.W.H., R.J.M.), Department of Pathology, Microbiology, and Immunology (J.M.C.), and Vanderbilt-Ingram Cancer Center (P.E.C., R.J.M.), Vanderbilt University Medical Center, Nashville, Tennessee 37232; Department of Biological Sciences (S.M.K., A.L.R., P.D.A.), Salisbury University, Salisbury, Maryland 21801; Department of Pathology (D.J.G.), Penn State University College of Medicine, Hershey, Pennsylvania 17033; Department of Urology (D.W.S.), University of Texas Southwestern Medical Center, Dallas, Texas 75390; Department of Cancer Biology (S.W.H.), NorthShore HealthSystem Research Institute, Evanston, Illinois 60201; Department of Biochemistry, Genetics, Genomics and Bioinformatics Program (R.M.G.), University at Buffalo, Buffalo, New York 14203; and Department of Cell and Developmental Biology (R.J.M.), Vanderbilt University, Nashville, Tennessee 37235
| | - Nicole L Miller
- Department of Urologic Surgery (M.M.G., T.C.C., J.Z., N.L.M., P.E.C., S.W.H., R.J.M.), Department of Pathology, Microbiology, and Immunology (J.M.C.), and Vanderbilt-Ingram Cancer Center (P.E.C., R.J.M.), Vanderbilt University Medical Center, Nashville, Tennessee 37232; Department of Biological Sciences (S.M.K., A.L.R., P.D.A.), Salisbury University, Salisbury, Maryland 21801; Department of Pathology (D.J.G.), Penn State University College of Medicine, Hershey, Pennsylvania 17033; Department of Urology (D.W.S.), University of Texas Southwestern Medical Center, Dallas, Texas 75390; Department of Cancer Biology (S.W.H.), NorthShore HealthSystem Research Institute, Evanston, Illinois 60201; Department of Biochemistry, Genetics, Genomics and Bioinformatics Program (R.M.G.), University at Buffalo, Buffalo, New York 14203; and Department of Cell and Developmental Biology (R.J.M.), Vanderbilt University, Nashville, Tennessee 37235
| | - Peter E Clark
- Department of Urologic Surgery (M.M.G., T.C.C., J.Z., N.L.M., P.E.C., S.W.H., R.J.M.), Department of Pathology, Microbiology, and Immunology (J.M.C.), and Vanderbilt-Ingram Cancer Center (P.E.C., R.J.M.), Vanderbilt University Medical Center, Nashville, Tennessee 37232; Department of Biological Sciences (S.M.K., A.L.R., P.D.A.), Salisbury University, Salisbury, Maryland 21801; Department of Pathology (D.J.G.), Penn State University College of Medicine, Hershey, Pennsylvania 17033; Department of Urology (D.W.S.), University of Texas Southwestern Medical Center, Dallas, Texas 75390; Department of Cancer Biology (S.W.H.), NorthShore HealthSystem Research Institute, Evanston, Illinois 60201; Department of Biochemistry, Genetics, Genomics and Bioinformatics Program (R.M.G.), University at Buffalo, Buffalo, New York 14203; and Department of Cell and Developmental Biology (R.J.M.), Vanderbilt University, Nashville, Tennessee 37235
| | - Simon W Hayward
- Department of Urologic Surgery (M.M.G., T.C.C., J.Z., N.L.M., P.E.C., S.W.H., R.J.M.), Department of Pathology, Microbiology, and Immunology (J.M.C.), and Vanderbilt-Ingram Cancer Center (P.E.C., R.J.M.), Vanderbilt University Medical Center, Nashville, Tennessee 37232; Department of Biological Sciences (S.M.K., A.L.R., P.D.A.), Salisbury University, Salisbury, Maryland 21801; Department of Pathology (D.J.G.), Penn State University College of Medicine, Hershey, Pennsylvania 17033; Department of Urology (D.W.S.), University of Texas Southwestern Medical Center, Dallas, Texas 75390; Department of Cancer Biology (S.W.H.), NorthShore HealthSystem Research Institute, Evanston, Illinois 60201; Department of Biochemistry, Genetics, Genomics and Bioinformatics Program (R.M.G.), University at Buffalo, Buffalo, New York 14203; and Department of Cell and Developmental Biology (R.J.M.), Vanderbilt University, Nashville, Tennessee 37235
| | - Richard M Gronostajski
- Department of Urologic Surgery (M.M.G., T.C.C., J.Z., N.L.M., P.E.C., S.W.H., R.J.M.), Department of Pathology, Microbiology, and Immunology (J.M.C.), and Vanderbilt-Ingram Cancer Center (P.E.C., R.J.M.), Vanderbilt University Medical Center, Nashville, Tennessee 37232; Department of Biological Sciences (S.M.K., A.L.R., P.D.A.), Salisbury University, Salisbury, Maryland 21801; Department of Pathology (D.J.G.), Penn State University College of Medicine, Hershey, Pennsylvania 17033; Department of Urology (D.W.S.), University of Texas Southwestern Medical Center, Dallas, Texas 75390; Department of Cancer Biology (S.W.H.), NorthShore HealthSystem Research Institute, Evanston, Illinois 60201; Department of Biochemistry, Genetics, Genomics and Bioinformatics Program (R.M.G.), University at Buffalo, Buffalo, New York 14203; and Department of Cell and Developmental Biology (R.J.M.), Vanderbilt University, Nashville, Tennessee 37235
| | - Philip D Anderson
- Department of Urologic Surgery (M.M.G., T.C.C., J.Z., N.L.M., P.E.C., S.W.H., R.J.M.), Department of Pathology, Microbiology, and Immunology (J.M.C.), and Vanderbilt-Ingram Cancer Center (P.E.C., R.J.M.), Vanderbilt University Medical Center, Nashville, Tennessee 37232; Department of Biological Sciences (S.M.K., A.L.R., P.D.A.), Salisbury University, Salisbury, Maryland 21801; Department of Pathology (D.J.G.), Penn State University College of Medicine, Hershey, Pennsylvania 17033; Department of Urology (D.W.S.), University of Texas Southwestern Medical Center, Dallas, Texas 75390; Department of Cancer Biology (S.W.H.), NorthShore HealthSystem Research Institute, Evanston, Illinois 60201; Department of Biochemistry, Genetics, Genomics and Bioinformatics Program (R.M.G.), University at Buffalo, Buffalo, New York 14203; and Department of Cell and Developmental Biology (R.J.M.), Vanderbilt University, Nashville, Tennessee 37235
| | - Robert J Matusik
- Department of Urologic Surgery (M.M.G., T.C.C., J.Z., N.L.M., P.E.C., S.W.H., R.J.M.), Department of Pathology, Microbiology, and Immunology (J.M.C.), and Vanderbilt-Ingram Cancer Center (P.E.C., R.J.M.), Vanderbilt University Medical Center, Nashville, Tennessee 37232; Department of Biological Sciences (S.M.K., A.L.R., P.D.A.), Salisbury University, Salisbury, Maryland 21801; Department of Pathology (D.J.G.), Penn State University College of Medicine, Hershey, Pennsylvania 17033; Department of Urology (D.W.S.), University of Texas Southwestern Medical Center, Dallas, Texas 75390; Department of Cancer Biology (S.W.H.), NorthShore HealthSystem Research Institute, Evanston, Illinois 60201; Department of Biochemistry, Genetics, Genomics and Bioinformatics Program (R.M.G.), University at Buffalo, Buffalo, New York 14203; and Department of Cell and Developmental Biology (R.J.M.), Vanderbilt University, Nashville, Tennessee 37235
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Lamani E, Gluhak-Heinrich J, MacDougall M. NFI-C2 temporal-spatial expression and cellular localization pattern during tooth formation. Dev Growth Differ 2015; 57:625-38. [PMID: 26687982 DOI: 10.1111/dgd.12253] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2015] [Revised: 10/14/2015] [Accepted: 10/15/2015] [Indexed: 01/25/2023]
Abstract
Currently, little is known regarding critical signaling pathways during later stages of tooth development, especially those associated with root formation. Nfi-c null mice, lacking molar roots, have implicated the transcription factor NFI-C as having an essential role in root development. Previously, we identified three NFI-C isoforms expressed in dental tissues with NFI-C2 being the major transcript. However, the expression pattern of the NFI-C2 protein is not characterized. In this study we performed in situ hybridization and immunohistochemistry using isoform specific probes. We show the production of a NFI-C2 peptide antibody, its characterization, the temporal-spatial expression pattern of the NFI-C2 protein during odontogenesis and sub-cellular localization in dental cells. Moderate NFI-C2 staining, as early as bud stage, was detected mostly in the condensing dental ectomesenchyme. This staining intensified within the dental pulp at later stages culminating in high expression in the dentin producing odontoblasts. The dental epithelium showed slight staining until cytodifferentiation of enamel organ into ameloblasts and stratum intermedium. During root formation NFI-C2 expression was high in the Hertwig's epithelial root sheath and later was found in the fully developed root and its supporting tissues. NFI-C2 cellular staining was cytosolic, associated with the Golgi, and nuclear. These data suggest a broader role for NFI-C during tooth formation than limited to root and periodontal ligament development.
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Affiliation(s)
- Ejvis Lamani
- Department of Orthodontics, School of Dentistry, University of Alabama at Birmingham, 1720 2nd Ave South, Birmingham, Alabama, USA.,Institute of Oral Health Research, School of Dentistry, University of Alabama at Birmingham, 1530 3rd Ave South, Birmingham, AL 35294-0007, USA
| | - Jelica Gluhak-Heinrich
- Department of Developmental Dentistry, The University of Texas Health Science Center at San Antonio, 7703 Floyd Curl Drive Mail code 7894, DTL 4.599U, San Antonio, TX 78229, USA
| | - Mary MacDougall
- Institute of Oral Health Research, School of Dentistry, University of Alabama at Birmingham, 1530 3rd Ave South, Birmingham, AL 35294-0007, USA
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Wang Y, Huang C, Chintagari NR, Xi D, Weng T, Liu L. miR-124 regulates fetal pulmonary epithelial cell maturation. Am J Physiol Lung Cell Mol Physiol 2015; 309:L400-13. [PMID: 26071557 DOI: 10.1152/ajplung.00356.2014] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2014] [Accepted: 06/08/2015] [Indexed: 01/01/2023] Open
Abstract
MicroRNAs are a family of small noncoding RNAs that regulate the expression of their target proteins at the posttranscriptional level. Their functions cover almost every aspect of cell physiology. However, the roles of microRNAs in fetal lung development are not completely understood. The objective of this study is to investigate the regulation and molecular mechanisms of alveolar epithelial cell maturation during fetal lung development by miR-124. We discovered that miR-124 was downregulated during rat fetal lung development and predominantly expressed in the epithelial cells at late stage of the lung development. Overexpression of miR-124 with an adenovirus vector led to the inhibition of epithelial maturation in rat fetal lung organ cultures and fetal alveolar epithelial type II cells, as demonstrated by a decrease in the type II cell marker expression and an increase in glycogen content. We further demonstrated by luciferase reporter assays that miR-124 inhibited the NF-κB, cAMP/PKA, and MAPK/ERK pathways. In addition, nuclear factor I/B (NFIB), a critical protein in fetal lung maturation, was validated as a direct target of miR-124. Furthermore, miR-124 expression was induced by the Wnt/β-catenin signaling pathway through a direct interaction of LEF1 and the miR-124 promoter region. We concluded that miR-124 downregulation is critical to fetal lung epithelial maturation and miR-124 inhibits this maturation process at least partially through the inhibition of NFIB.
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Affiliation(s)
- Yang Wang
- Lundberg-Kienlen Lung Biology and Toxicology Laboratory, Department of Physiological Sciences, Oklahoma State University, Stillwater, Oklahoma; and
| | - Chaoqun Huang
- Lundberg-Kienlen Lung Biology and Toxicology Laboratory, Department of Physiological Sciences, Oklahoma State University, Stillwater, Oklahoma; and Oklahoma Center for Respiratory and Infectious Diseases, Oklahoma State University, Stillwater, Oklahoma
| | - Narendranath Reddy Chintagari
- Lundberg-Kienlen Lung Biology and Toxicology Laboratory, Department of Physiological Sciences, Oklahoma State University, Stillwater, Oklahoma; and
| | - Dong Xi
- Lundberg-Kienlen Lung Biology and Toxicology Laboratory, Department of Physiological Sciences, Oklahoma State University, Stillwater, Oklahoma; and
| | - Tingting Weng
- Lundberg-Kienlen Lung Biology and Toxicology Laboratory, Department of Physiological Sciences, Oklahoma State University, Stillwater, Oklahoma; and
| | - Lin Liu
- Lundberg-Kienlen Lung Biology and Toxicology Laboratory, Department of Physiological Sciences, Oklahoma State University, Stillwater, Oklahoma; and Oklahoma Center for Respiratory and Infectious Diseases, Oklahoma State University, Stillwater, Oklahoma
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Tagne JB, Mohtar OR, Campbell JD, Lakshminarayanan M, Huang J, Hinds AC, Lu J, Ramirez MI. Transcription factor and microRNA interactions in lung cells: an inhibitory link between NK2 homeobox 1, miR-200c and the developmental and oncogenic factors Nfib and Myb. Respir Res 2015; 16:22. [PMID: 25763778 PMCID: PMC4335692 DOI: 10.1186/s12931-015-0186-6] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2014] [Accepted: 01/30/2015] [Indexed: 12/23/2022] Open
Abstract
BACKGROUND The transcription factor NK2 homeobox 1 (Nkx2-1) plays essential roles in epithelial cell proliferation and differentiation in mouse and human lung development and tumorigenesis. A better understanding of genes and pathways downstream of Nkx2-1 will clarify the multiple roles of this critical lung factor. Nkx2-1 regulates directly or indirectly numerous protein-coding genes; however, there is a paucity of information about Nkx2-1-regulated microRNAs (miRNAs). METHODS AND RESULTS By miRNA array analyses of mouse epithelial cell lines in which endogenous Nkx2-1 was knocked-down, we revealed that 29 miRNAs were negatively regulated including miR-200c, and 39 miRNAs were positively regulated by Nkx2-1 including miR-1195. Mouse lungs lacking functional phosphorylated Nkx2-1 showed increased expression of miR-200c and alterations in the expression of other top regulated miRNAs. Moreover, chromatin immunoprecipitation assays showed binding of NKX2-1 protein to regulatory regions of these miRNAs. Promoter reporter assays indicated that 1kb of the miR-200c 5' flanking region was transcriptionally active but did not mediate Nkx2-1- repression of miR-200c expression. 3'UTR reporter assays support a direct regulation of the predicted targets Nfib and Myb by miR-200c. CONCLUSIONS These studies suggest that Nkx2-1 controls the expression of specific miRNAs in lung epithelial cells. In particular, we identified a regulatory link between Nkx2-1, the known tumor suppressor miR-200c, and the developmental and oncogenic transcription factors Nfib and Myb, adding new players to the regulatory mechanisms driven by Nkx2-1 in lung epithelial cells that may have implications in lung development and tumorigenesis.
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Affiliation(s)
- Jean-Bosco Tagne
- The Pulmonary Center, Boston University School of Medicine, Boston, USA.
| | - Omar R Mohtar
- The Pulmonary Center, Boston University School of Medicine, Boston, USA.
| | - Joshua D Campbell
- Section of Computational Biomedicine, Department of Medicine, Boston University School of Medicine, Boston, USA.
| | | | - Jingshu Huang
- The Pulmonary Center, Boston University School of Medicine, Boston, USA.
| | - Anne C Hinds
- The Pulmonary Center, Boston University School of Medicine, Boston, USA.
| | - Jining Lu
- The Pulmonary Center, Boston University School of Medicine, Boston, USA.
| | - Maria I Ramirez
- The Pulmonary Center, Boston University School of Medicine, Boston, USA.
- Department of Pathology and Laboratory Medicine, Boston University School of Medicine, 72 E. Concord St, Boston, MA, 02118, USA.
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Gao S, Zhao YM, Ge LH. Nuclear factor I-C expression pattern in developing teeth and its important role in odontogenic differentiation of human molar stem cells from the apical papilla. Eur J Oral Sci 2014; 122:382-90. [PMID: 25302926 DOI: 10.1111/eos.12151] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/01/2014] [Indexed: 11/28/2022]
Abstract
Nuclear factor I-C (NFIC) has an important role in the development of murine dental roots, but its role in human root formation is unreported. We thus elucidated the regulatory role of NFIC in the differentiation of human stem cells from the apical papilla (hSCAPs). The first step for this was to determine the expression of NFIC in human teeth, and it was found that NFIC expression was restricted to the odontoblasts and preodontoblasts of the developing molars of humans and mice. NFIC was found to be expressed in odontoblast-like cells after the subcutaneous transplantation of hSCAPs. NFIC expression was concomitant with dentin sialophosphoprotein (DSPP) in the mineralization of hSCAPs. NFIC knockdown in hSCAPs significantly inhibited expression of DSPP and promoted that of dentin matrix protein 1 (DMP1), meanwhile upregulated the expression of TGF-β1 and downregulated SMAD3 and SMAD4. NFIC expression was significantly upregulated after TGF-β1 treatment in hSCAPs. NFIC knockdown prolonged G1 phase of the cell cycle, but had no effect on cell proliferation and migration. These results suggest that NFIC is involved in the development of human root dentin and the regulation of odontoblastic differentiation of hSCAPs. NFIC may participate in the DMP1-DSPP signaling pathway and comprises a complex signaling cycle with TGF-β1.
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Affiliation(s)
- Shuo Gao
- Department of Pediatric Dentistry, Peking University School and Hospital of Stomatology, Peking University Health Science Center, Peking University, Beijing, China
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Harris L, Genovesi LA, Gronostajski RM, Wainwright BJ, Piper M. Nuclear factor one transcription factors: Divergent functions in developmental versus adult stem cell populations. Dev Dyn 2014; 244:227-38. [PMID: 25156673 DOI: 10.1002/dvdy.24182] [Citation(s) in RCA: 55] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2014] [Revised: 08/18/2014] [Accepted: 08/20/2014] [Indexed: 12/13/2022] Open
Abstract
Nuclear factor one (NFI) transcription factors are a group of site-specific DNA-binding proteins that are emerging as critical regulators of stem cell biology. During development NFIs promote the production of differentiated progeny at the expense of stem cell fate, with Nfi null mice exhibiting defects such as severely delayed brain and lung maturation, skeletomuscular defects and renal abnormalities, phenotypes that are often consistent with patients with congenital Nfi mutations. Intriguingly, recent research suggests that in adult tissues NFI factors play a qualitatively different role than during development, with NFIs serving to promote the survival and maintenance of slow-cycling adult stem cell populations rather than their differentiation. Here we review the role of NFI factors in development, largely focusing on their role as promoters of stem cell differentiation, and attempt to reconcile this with the emerging role of NFIs in adult stem cell niches.
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Affiliation(s)
- Lachlan Harris
- The School of Biomedical Sciences, The University of Queensland, Brisbane, Australia
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Grabowska MM, Elliott AD, DeGraff DJ, Anderson PD, Anumanthan G, Yamashita H, Sun Q, Friedman DB, Hachey DL, Yu X, Sheehan JH, Ahn JM, Raj GV, Piston DW, Gronostajski RM, Matusik RJ. NFI transcription factors interact with FOXA1 to regulate prostate-specific gene expression. Mol Endocrinol 2014; 28:949-64. [PMID: 24801505 DOI: 10.1210/me.2013-1213] [Citation(s) in RCA: 60] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
Androgen receptor (AR) action throughout prostate development and in maintenance of the prostatic epithelium is partly controlled by interactions between AR and forkhead box (FOX) transcription factors, particularly FOXA1. We sought to identity additional FOXA1 binding partners that may mediate prostate-specific gene expression. Here we identify the nuclear factor I (NFI) family of transcription factors as novel FOXA1 binding proteins. All four family members (NFIA, NFIB, NFIC, and NFIX) can interact with FOXA1, and knockdown studies in androgen-dependent LNCaP cells determined that modulating expression of NFI family members results in changes in AR target gene expression. This effect is probably mediated by binding of NFI family members to AR target gene promoters, because chromatin immunoprecipitation (ChIP) studies found that NFIB bound to the prostate-specific antigen enhancer. Förster resonance energy transfer studies revealed that FOXA1 is capable of bringing AR and NFIX into proximity, indicating that FOXA1 facilitates the AR and NFI interaction by bridging the complex. To determine the extent to which NFI family members regulate AR/FOXA1 target genes, motif analysis of publicly available data for ChIP followed by sequencing was undertaken. This analysis revealed that 34.4% of peaks bound by AR and FOXA1 contain NFI binding sites. Validation of 8 of these peaks by ChIP revealed that NFI family members can bind 6 of these predicted genomic elements, and 4 of the 8 associated genes undergo gene expression changes as a result of individual NFI knockdown. These observations suggest that NFI regulation of FOXA1/AR action is a frequent event, with individual family members playing distinct roles in AR target gene expression.
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Affiliation(s)
- Magdalena M Grabowska
- Department of Urologic Surgery (M.M.G., G.A. H.Y., Q.S., X.Y., R.J.M.), Department of Molecular Physiology and Biophysics (A.D.E., D.W.P.), and Vanderbilt-Ingram Cancer Center (R.J.M.), Vanderbilt University Medical Center, Nashville, Tennessee 37232; Department of Pathology (D.J.D.), Penn State University College of Medicine, Hershey, Pennsylvania 17033; Department of Biological Sciences (P.D.A.), Salisbury University, Salisbury, Maryland 21801; Mass Spectrometry Research Center (D.B.F., D.L.H.), Department of Biochemistry, Department of Biochemistry and Center for Structural Biology (J.H.S.), and Department of Cell and Developmental Biology (R.J.M.), Vanderbilt University, Nashville, Tennessee 37232; Department of Chemistry (J.-M.A.), University of Texas Dallas, Dallas, Texas 75080; Department of Urology (G.V.R.), University of Texas Southwestern, Dallas, Texas 75390; and Department of Biochemistry (R.M.G.), Developmental Genomics Group, NY State Center of Excellence in Bioinformatics and Life Sciences, University at Buffalo, Buffalo, New York 14203
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Abstract
The melanocyte stem cells of the hair follicle provide an attractive system for the study of the stem cells. Successful regeneration of a functional organ relies on the organized and timely orchestration of molecular events among distinct stem/progenitor cell populations. The stem cells are regulated by communication with their specialized microenvironment known as the niche. Despite remarkable progress in understanding stem cell-intrinsic behavior, the molecular nature of the extrinsic factors provided to the stem cells by the niche microenvironment remains poorly understood. In this regard, the bulge niche of the mammalian hair follicle offers an excellent model for study. It holds two resident populations of SCs: epidermal stem cells and melanocyte stem cells. While their behavior is tightly coordinated, very little of the crosstalk involved is known. This review summarized the recent development in trying to understand the regulation of melanocyte and melanocyte stem cells. A better understanding of the normal regulation and behaviors of the melanocytes and the melanocyte stem cells will help to improve the clinical applications in regenerative medicine, cancer therapy, and aging.
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Affiliation(s)
- Ang Li
- Laboratory of Mammalian Cell Biology and Development, The Rockefeller University, 1230 York Avenue, PO 300, New York, NY 10065, USA
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Robinson GW, Kang K, Yoo KH, Tang Y, Zhu BM, Yamaji D, Colditz V, Jang SJ, Gronostajski RM, Hennighausen L. Coregulation of genetic programs by the transcription factors NFIB and STAT5. Mol Endocrinol 2014; 28:758-67. [PMID: 24678731 DOI: 10.1210/me.2012-1387] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023] Open
Abstract
Mammary-specific genetic programs are activated during pregnancy by the common transcription factor signal transducer and activator of transcription (STAT) 5. More than one third of these genes carry nuclear factor I/B (NFIB) binding motifs that coincide with STAT5 in vivo binding, suggesting functional synergy between these two transcription factors. The role of NFIB in this governance was investigated in mice from which Nfib had been inactivated in mammary stem cells or in differentiating alveolar epithelium. Although NFIB was not required for alveolar expansion, the combined absence of NFIB and STAT5 prevented the formation of functional alveoli. NFIB controlled the expression of mammary-specific and STAT5-regulated genes and chromatin immunoprecipitation-sequencing established STAT5 and NFIB binding at composite regulatory elements containing histone H3 lysine dimethylation enhancer marks and progesterone receptor binding. By integrating previously published chromatin immunoprecipitation-sequencing data sets, the presence of NFIB-STAT5 modules in other cell types was investigated. Notably, genomic sites bound by NFIB in hair follicle stem cells were also occupied by STAT5 in mammary epithelium and coincided with enhancer marks. Many of these genes were under NFIB control in both hair follicle stem cells and mammary alveolar epithelium. We propose that NFIB-STAT5 modules, possibly in conjunction with other transcription factors, control cell-specific genetic programs.
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Affiliation(s)
- Gertraud W Robinson
- Laboratory of Genetics and Physiology (G.W.R., K.K., K.H.Y., Y.T., D.Y., V.C., S.J.J., L.H.), National Institute of Diabetes, Digestive and Kidney Diseases, National Institutes of Health, Bethesda, Maryland 20892; Department of Microbiology (K.K.), Dankook University, Cheonan 330-714, Republic of Korea; Chengdu University of Traditional Chinese Medicine (Y.T.), Chengdu 610072, Republic of China; Key Laboratory of Acupuncture and Medicine (B.-M.Z.), Nanjing University of Traditional Chinese Medicine, Nanjing 210046, Republic of China; and New York State Center of Excellence in Bioinformatics and Life Sciences (R.M.G.), Department of Biochemistry, Developmental Genomics Group, University at Buffalo, Buffalo, New York 14203
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Lajoie M, Hsu YC, Gronostajski RM, Bailey TL. An overlapping set of genes is regulated by both NFIB and the glucocorticoid receptor during lung maturation. BMC Genomics 2014; 15:231. [PMID: 24661679 PMCID: PMC4023408 DOI: 10.1186/1471-2164-15-231] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2013] [Accepted: 03/11/2014] [Indexed: 01/22/2023] Open
Abstract
Background Lung maturation is a late fetal developmental event in both mice and humans. Because of this, lung immaturity is a serious problem in premature infants. Disruption of genes for either the glucocorticoid receptor (Nr3c1) or the NFIB transcription factors results in perinatal lethality due to lung immaturity. In both knockouts, the phenotype includes excess cell proliferation, failure of saccularization and reduced expression of markers of epithelial differentiation. This similarity suggests that the two genes may co-regulate a specific set of genes essential for lung maturation. Results We analyzed the roles of these two transcription factors in regulating transcription using ChIP-seq data for NFIB, and RNA expression data and motif analysis for both. Our new ChIP-seq data for NFIB in lung at E16.5 shows that NFIB binds to a NFI motif. This motif is over-represented in the promoters of genes that are under-expressed in Nfib-KO mice at E18.5, suggesting an activator role for NFIB. Using available microarray data from Nr3c1-KO mice, we further identified 52 genes that are under-expressed in both Nfib and Nr3c1 knockouts, an overlap which is 13.1 times larger than what would be expected by chance. Finally, we looked for enrichment of 738 recently published transcription factor motifs in the promoters of these putative target genes and found that the NFIB and glucocorticoid receptor motifs were among the most enriched, suggesting that a subset of these genes may be directly activated by Nfib and Nr3c1. Conclusions Our data provide the first evidence for Nfib and Nr3c1 co-regulating genes related to lung maturation. They also establish that the in vivo DNA-binding specificity of NFIB is the same as previously seen in vitro, and highly similar to that of the other NFI-family members NFIA, NFIC and NFIX.
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Affiliation(s)
| | | | | | - Timothy L Bailey
- Institute for Molecular Bioscience, The University of Queensland, 306 Carmody Road, St Lucia 4072, Australia.
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Pais RS, Moreno-Barriuso N, Hernández-Porras I, López IP, De Las Rivas J, Pichel JG. Transcriptome analysis in prenatal IGF1-deficient mice identifies molecular pathways and target genes involved in distal lung differentiation. PLoS One 2013; 8:e83028. [PMID: 24391734 PMCID: PMC3877002 DOI: 10.1371/journal.pone.0083028] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2013] [Accepted: 10/30/2013] [Indexed: 01/31/2023] Open
Abstract
Background Insulin-like Growth Factor 1 (IGF1) is a multifunctional regulator of somatic growth and development throughout evolution. IGF1 signaling through IGF type 1 receptor (IGF1R) controls cell proliferation, survival and differentiation in multiple cell types. IGF1 deficiency in mice disrupts lung morphogenesis, causing altered prenatal pulmonary alveologenesis. Nevertheless, little is known about the cellular and molecular basis of IGF1 activity during lung development. Methods/Principal Findings Prenatal Igf1−/− mutant mice with a C57Bl/6J genetic background displayed severe disproportional lung hypoplasia, leading to lethal neonatal respiratory distress. Immuno-histological analysis of their lungs showed a thickened mesenchyme, alterations in extracellular matrix deposition, thinner smooth muscles and dilated blood vessels, which indicated immature and delayed distal pulmonary organogenesis. Transcriptomic analysis of Igf1−/− E18.5 lungs using RNA microarrays identified deregulated genes related to vascularization, morphogenesis and cellular growth, and to MAP-kinase, Wnt and cell-adhesion pathways. Up-regulation of immunity-related genes was verified by an increase in inflammatory markers. Increased expression of Nfib and reduced expression of Klf2, Egr1 and Ctgf regulatory proteins as well as activation of ERK2 MAP-kinase were corroborated by Western blot. Among IGF-system genes only IGFBP2 revealed a reduction in mRNA expression in mutant lungs. Immuno-staining patterns for IGF1R and IGF2, similar in both genotypes, correlated to alterations found in specific cell compartments of Igf1−/− lungs. IGF1 addition to Igf1−/− embryonic lungs cultured ex vivo increased airway septa remodeling and distal epithelium maturation, processes accompanied by up-regulation of Nfib and Klf2 transcription factors and Cyr61 matricellular protein. Conclusions/Significance We demonstrated the functional tissue specific implication of IGF1 on fetal lung development in mice. Results revealed novel target genes and gene networks mediators of IGF1 action on pulmonary cellular proliferation, differentiation, adhesion and immunity, and on vascular and distal epithelium maturation during prenatal lung development.
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Affiliation(s)
- Rosete Sofía Pais
- Centro de Investigación Biomédica de la Rioja, Fundación Rioja Salud, Logroño, Spain
| | - Nuria Moreno-Barriuso
- Instituto de Biología Molecular y Celular del Cáncer - Centro de Investigación del Cáncer, Consejo Superior de Investigaciones Científicas – University of Salamanca, Salamanca, Spain
| | - Isabel Hernández-Porras
- Instituto de Biología Molecular y Celular del Cáncer - Centro de Investigación del Cáncer, Consejo Superior de Investigaciones Científicas – University of Salamanca, Salamanca, Spain
| | - Icíar Paula López
- Centro de Investigación Biomédica de la Rioja, Fundación Rioja Salud, Logroño, Spain
| | - Javier De Las Rivas
- Instituto de Biología Molecular y Celular del Cáncer - Centro de Investigación del Cáncer, Consejo Superior de Investigaciones Científicas – University of Salamanca, Salamanca, Spain
| | - José García Pichel
- Centro de Investigación Biomédica de la Rioja, Fundación Rioja Salud, Logroño, Spain
- * E-mail:
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Brun M, Glubrecht DD, Baksh S, Godbout R. Calcineurin regulates nuclear factor I dephosphorylation and activity in malignant glioma cell lines. J Biol Chem 2013; 288:24104-15. [PMID: 23839947 DOI: 10.1074/jbc.m113.455832] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023] Open
Abstract
Malignant gliomas (MG), including grades III and IV astrocytomas, are the most common adult brain tumors. These tumors are highly aggressive with a median survival of less than 2 years. Nuclear factor I (NFI) is a family of transcription factors that regulates the expression of glial genes in the developing brain. We have previously shown that regulation of the brain fatty acid-binding protein (B-FABP; FABP7) and glial fibrillary acidic protein (GFAP) genes in MG cells is dependent on the phosphorylation state of NFI, with hypophosphorylation of NFI correlating with GFAP and B-FABP expression. Importantly, NFI phosphorylation is dependent on phosphatase activity that is enriched in GFAP/B-FABP+ve cells. Using chromatin immunoprecipitation, we show that NFI occupies the GFAP and B-FABP promoters in NFI-hypophosphorylated GFAP/B-FABP+ve MG cells. NFI occupancy, NFI-dependent transcriptional activity, and NFI phosphorylation are all modulated by the serine/threonine phosphatase calcineurin. Importantly, a cleaved form of calcineurin, associated with increased phosphatase activity, is specifically expressed in NFI-hypophosphorylated GFAP/B-FABP+ve MG cells. Calcineurin in GFAP/B-FABP+ve MG cells localizes to the nucleus. In contrast, calcineurin is primarily found in the cytoplasm of GFAP/B-FABP-ve cells, suggesting a dual mechanism for calcineurin activation in MG. Finally, our results demonstrate that calcineurin expression is up-regulated in areas of high infiltration/migration in grade IV astrocytoma tumor tissue. Our data suggest a critical role for calcineurin in NFI transcriptional regulation and in the determination of MG infiltrative properties.
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Affiliation(s)
- Miranda Brun
- Departments of Oncology, University of Alberta, Cross Cancer Institute, Edmonton, Alberta T6G 1Z2, Canada
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NFIB is a governor of epithelial-melanocyte stem cell behaviour in a shared niche. Nature 2013; 495:98-102. [PMID: 23389444 DOI: 10.1038/nature11847] [Citation(s) in RCA: 121] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2012] [Accepted: 12/19/2012] [Indexed: 12/17/2022]
Abstract
Adult stem cells reside in specialized niches where they receive environmental cues to maintain tissue homeostasis. In mammals, the stem cell niche within hair follicles is home to epithelial hair follicle stem cells and melanocyte stem cells, which sustain cyclical bouts of hair regeneration and pigmentation. To generate pigmented hairs, synchrony is achieved such that upon initiation of a new hair cycle, stem cells of each type activate lineage commitment. Dissecting the inter-stem-cell crosstalk governing this intricate coordination has been difficult, because mutations affecting one lineage often affect the other. Here we identify transcription factor NFIB as an unanticipated coordinator of stem cell behaviour. Hair follicle stem-cell-specific conditional targeting of Nfib in mice uncouples stem cell synchrony. Remarkably, this happens not by perturbing hair cycle and follicle architecture, but rather by promoting melanocyte stem cell proliferation and differentiation. The early production of melanin is restricted to melanocyte stem cells at the niche base. Melanocyte stem cells more distant from the dermal papilla are unscathed, thereby preventing hair greying typical of melanocyte stem cell differentiation mutants. Furthermore, we pinpoint KIT-ligand as a dermal papilla signal promoting melanocyte stem cell differentiation. Additionally, through chromatin-immunoprecipitation with high-throughput-sequencing and transcriptional profiling, we identify endothelin 2 (Edn2) as an NFIB target aberrantly activated in NFIB-deficient hair follicle stem cells. Ectopically induced Edn2 recapitulates NFIB-deficient phenotypes in wild-type mice. Conversely, endothelin receptor antagonists and/or KIT blocking antibodies prevent precocious melanocyte stem cell differentiation in the NFIB-deficient niche. Our findings reveal how melanocyte and hair follicle stem cell behaviours maintain reliance upon cooperative factors within the niche, and how this can be uncoupled in injury, stress and disease states.
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Duval C, Gaudreault M, Vigneault F, Touzel-Deschênes L, Rochette PJ, Masson-Gadais B, Germain L, Guérin SL. Rescue of the transcription factors Sp1 and NFI in human skin keratinocytes through a feeder-layer-dependent suppression of the proteasome activity. J Mol Biol 2012; 418:281-99. [PMID: 22420942 DOI: 10.1016/j.jmb.2012.01.021] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2011] [Revised: 01/17/2012] [Accepted: 01/19/2012] [Indexed: 12/01/2022]
Abstract
Co-culturing human skin keratinocytes along with a feeder layer has proven to considerably improve their proliferative properties by delaying massive induction of terminal differentiation. Through a yet unclear mechanism, we recently reported that irradiated 3T3 (i3T3) fibroblasts used as a feeder layer increase the nuclear content of Sp1, a positive transcription factor (TF) that plays a critical role in many cellular functions including cell proliferation, into both adult skin keratinocytes and newborn skin keratinocytes. In this study, we examined the influence of i3T3 on the expression and DNA binding of NFI, another TF important for cell proliferation and cell cycle progression, and attempted to decipher the mechanism by which the feeder layer contributes at maintaining higher levels of these TFs in skin keratinocytes. Our results indicate that co-culturing both adult skin keratinocytes and newborn skin keratinocytes along with a feeder layer dramatically increases glycosylation of NFI and may prevent it from being degraded by the proteasome.
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Affiliation(s)
- Céline Duval
- LOEX/CUO-Recherche, Hôpital du Saint-Sacrement, Centre de Recherche du CHA, Québec, QC, Canada G1S4L8
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Lee DS, Yoon WJ, Cho ES, Kim HJ, Gronostajski RM, Cho MI, Park JC. Crosstalk between nuclear factor I-C and transforming growth factor-β1 signaling regulates odontoblast differentiation and homeostasis. PLoS One 2011; 6:e29160. [PMID: 22195013 PMCID: PMC3241690 DOI: 10.1371/journal.pone.0029160] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2011] [Accepted: 11/22/2011] [Indexed: 02/02/2023] Open
Abstract
Transforming growth factor-β1 (TGF-β1) signaling plays a key role in vertebrate development, homeostasis, and disease. Nuclear factor I-C (NFI-C) has been implicated in TGF-β1 signaling, extracellular matrix gene transcription, and tooth root development. However, the functional relationship between NFI-C and TGF-β1 signaling remains uncharacterized. The purpose of this study was to identify the molecular interactions between NFI-C and TGF-β1 signaling in mouse odontoblasts. Real-time polymerase chain reaction and western analysis demonstrated that NFI-C expression levels were inversely proportional to levels of TGF-β1 signaling molecules during in vitro odontoblast differentiation. Western blot and immunofluorescence results showed that NFI-C was significantly degraded after TGF-β1 addition in odontoblasts, and the formation of the Smad3 complex was essential for NFI-C degradation. Additionally, ubiquitination assay results showed that Smurf1 and Smurf2 induced NFI-C degradation and polyubiquitination in a TGF-β1-dependent manner. Both kinase and in vitro binding assays revealed that the interaction between NFI-C and Smurf1/Smurf2 requires the activation of the mitogen-activated protein kinase pathway by TGF-β1. Moreover, degradation of NFI-C induced by TGF-β1 occurred generally in cell types other than odontoblasts in normal human breast epithelial cells. In contrast, NFI-C induced dephosphorylation of p-Smad2/3. These results show that crosstalk between NFI-C and TGF-β1 signaling regulates cell differentiation and homeostatic processes in odontoblasts, which might constitute a common cellular mechanism.
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Affiliation(s)
- Dong-Seol Lee
- Department of Oral Histology-Developmental Biology and Dental Research Institute, School of Dentistry, Seoul National University, Seoul, Korea
| | - Won-Joon Yoon
- Department of Molecular Genetics, BK21 Project, School of Dentistry, Seoul National University, Seoul, Korea
| | - Eui Sic Cho
- Laboratory for Craniofacial Biology, Institute of Oral Bioscience, Chonbuk National University, Jeon-ju, Korea
| | - Heung-Joong Kim
- Department of Oral Anatomy and Developmental Biology, College of Dentistry, Chosun University, Gwang-ju, Korea
| | - Richard M. Gronostajski
- Department of Biochemistry, Program in Neuroscience, Developmental Genomics Group and Center of Excellence in Bioinformatics and Life Sciences, School of Medicine and Biomedical Science, State University of New York at Buffalo, Buffalo, New York, United States of America
| | - Moon-Il Cho
- Department of Oral Biology, School of Dental Medicine, State University of New York at Buffalo, Buffalo, New York, United States of America
| | - Joo-Cheol Park
- Department of Oral Histology-Developmental Biology and Dental Research Institute, School of Dentistry, Seoul National University, Seoul, Korea
- * E-mail:
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Dooley AL, Winslow MM, Chiang DY, Banerji S, Stransky N, Dayton TL, Snyder EL, Senna S, Whittaker CA, Bronson RT, Crowley D, Barretina J, Garraway L, Meyerson M, Jacks T. Nuclear factor I/B is an oncogene in small cell lung cancer. Genes Dev 2011; 25:1470-5. [PMID: 21764851 DOI: 10.1101/gad.2046711] [Citation(s) in RCA: 128] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Small cell lung cancer (SCLC) is an aggressive cancer often diagnosed after it has metastasized. Despite the need to better understand this disease, SCLC remains poorly characterized at the molecular and genomic levels. Using a genetically engineered mouse model of SCLC driven by conditional deletion of Trp53 and Rb1 in the lung, we identified several frequent, high-magnitude focal DNA copy number alterations in SCLC. We uncovered amplification of a novel, oncogenic transcription factor, Nuclear factor I/B (Nfib), in the mouse SCLC model and in human SCLC. Functional studies indicate that NFIB regulates cell viability and proliferation during transformation.
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Affiliation(s)
- Alison L Dooley
- David H. Koch Institute for Integrative Cancer Research,Department of Biology, Massachusetts Institute of Technology, Cambridge, USA
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NFIB is a potential target for estrogen receptor-negative breast cancers. Mol Oncol 2011; 5:538-44. [PMID: 21925980 DOI: 10.1016/j.molonc.2011.08.002] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2011] [Revised: 08/02/2011] [Accepted: 08/03/2011] [Indexed: 01/09/2023] Open
Abstract
BACKGROUND The association between nuclear factor I/B (NFIB) gene and triple negative breast cancer has been previously suggested. METHODS We investigated the relationship between NFIB mRNA and protein expression and molecular subtypes of breast cancer as well as the effect of NFIB silencing on the proliferation and apoptosis of breast cancer cells. Also, the clinical importance of NFIB expression was investigated in 163 breast cancer patients. RESULTS By using 20 frozen human breast cancer tissues and various breast cancer cell lines, we observed a significant high level of NFIB mRNA level in triple negative breast cancer. NFIB protein was upregulated in ER negative breast cancer tissues but the expression level was similar between HER2 subtype and triple negative subtype. The clinical significance of NFIB was further examined in a tissue microarray from 163 invasive breast cancer patients, and the immunohistochemistry results showed a significant association between NFIB expression and nuclear grade, ER, and HER2 expression status. NFIB positive tumors were more likely to have high nuclear grade, ER negativity and HER2 over-expression. HCC1954 cells transfected with siRNA against NFIB showed a significant reduction in cell proliferation and increase in apoptotic signaling pathway. CONCLUSIONS Our results show a potential role of NFIB as a novel target in ER negative breast cancers.
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Davis H, Lewis A, Spencer-Dene B, Tateossian H, Stamp G, Behrens A, Tomlinson I. FBXW7 mutations typically found in human cancers are distinct from null alleles and disrupt lung development. J Pathol 2011; 224:180-9. [PMID: 21503901 PMCID: PMC3757315 DOI: 10.1002/path.2874] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2011] [Revised: 02/03/2011] [Accepted: 02/10/2011] [Indexed: 01/25/2023]
Abstract
FBXW7 is the substrate recognition component of a SCF-type E3 ubiquitin ligase. It has multiple targets such as Notch1, c-Jun, and cyclin E that function in critical developmental and signalling pathways. Mutations in FBXW7 are often found in many types of cancer. In most cases, these mutations do not inactivate the protein, but are mono-allelic missense changes at specific arginine resides involved in substrate binding. We have hypothesized that FBXW7 mutations are selected in cancers for reasons other than haploinsufficiency or full loss-of-function. Given that the existing mutant Fbxw7 mice carry null alleles, we created a mouse model carrying one of the commonly occurring point mutations (Fbxw7) in the WD40 substrate recognition domain of Fbxw7. Mice heterozygous for this mutation apparently developed normally in utero, died perinatally due to a defect in lung development, and in some cases showed cleft palate and eyelid fusion defects. By comparison, Fbxw7+/− mice were viable and developed normally. Fbxw7−/− animals died of vascular abnormalities at E10.5. We screened known FBXW7 targets for changes in the lungs of the Fbxw7R482Q/+ mice and found Tgif1 and Klf5 to be up-regulated. Fbxw7 alleles are not functionally equivalent to heterozygous or homozygous null alleles, and we propose that they are selected in tumourigenesis because they cause a selective or partial loss of FBXW7 function. Copyright © 2011 Pathological Society of Great Britain and Ireland. Published by John Wiley & Sons, Ltd.
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Affiliation(s)
- Hayley Davis
- Molecular and Population Genetics Laboratory, Wellcome Trust Centre for Human Genetics, Oxford University, Roosevelt Drive, Oxford OX3 7BN, UK
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Hsu YC, Osinski J, Campbell CE, Litwack ED, Wang D, Liu S, Bachurski CJ, Gronostajski RM. Mesenchymal nuclear factor I B regulates cell proliferation and epithelial differentiation during lung maturation. Dev Biol 2011; 354:242-52. [PMID: 21513708 DOI: 10.1016/j.ydbio.2011.04.002] [Citation(s) in RCA: 52] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2011] [Revised: 04/04/2011] [Accepted: 04/06/2011] [Indexed: 01/01/2023]
Abstract
The Nuclear factor I (NFI) transcription factor family consists of four genes (Nfia, Nfib, Nfic and Nfix) that regulate the development of multiple organ systems in mice and humans. Nfib is expressed in both lung mesenchyme and epithelium and mice lacking Nfib have severe lung maturation defects and die at birth. Here we continue our analysis of the phenotype of Nfib⁻/⁻ lungs and show that Nfib specifically in lung mesenchyme controls late epithelial and mesenchymal cell proliferation and differentiation. There are more PCNA, BrdU, PHH3 and Ki67 positive cells in Nfib⁻/⁻ lungs than in wild type lungs at E18.5 and this increase in proliferation marker expression is seen in both epithelial and mesenchymal cells. The loss of Nfib in all lung cells decreases the expression of markers for alveolar epithelial cells (Aqp5 and Sftpc), Clara cells (Scgb1a1) and ciliated cells (Foxj1) in E18.5 lungs. To test for a specific role of Nfib in lung mesenchyme we generated and analyzed Nfib(flox/flox), Dermo1-Cre mice. Loss of Nfib only in mesenchyme results in decreased Aqp5, Sftpc and Foxj1 expression, increased cell proliferation, and a defect in sacculation similar to that seen in Nfib⁻/⁻ mice. In contrast, mesenchyme specific loss of Nfib had no effect on the expression of Scgb1a1 in the airway. Microarray and QPCR analyses indicate that the loss of Nfib in lung mesenchyme affects the expression of genes associated with extracellular matrix, cell adhesion and FGF signaling which could affect distal lung maturation. Our data indicate that mesenchymal Nfib regulates both mesenchymal and epithelial cell proliferation through multiple pathways and that mesenchymal NFI-B-mediated signals are essential for the maturation of distal lung epithelium.
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Affiliation(s)
- Yu-Chih Hsu
- Department of Biochemistry, Developmental Genomics Group, Center of Excellence in Bioinformatics and Life Science, State University of New York at Buffalo, 701 Ellicott St. Buffalo, NY 14203, USA
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Plasari G, Edelmann S, Högger F, Dusserre Y, Mermod N, Calabrese A. Nuclear factor I-C regulates TGF-{beta}-dependent hair follicle cycling. J Biol Chem 2010; 285:34115-25. [PMID: 20729551 DOI: 10.1074/jbc.m110.120659] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Skin appendages such as teeth and hair share several common signaling pathways. The nuclear factor I C (NFI-C) transcription factor has been implicated in tooth development, but a potential role in hair growth had not been assessed. In this study we found that NFI-C regulates the onset of the hair growth cycle. NFI-C(-/-) mice were delayed in the transition from the telogen to anagen phase of the hair follicle cycle after either experimental depilation or spontaneous hair loss. Lack of NFI-C resulted in delayed induction of the sonic hedgehog, Wnt5a, and Lef1 gene expression, which are key regulators of the hair follicle growth initiation. NFI-C(-/-) mice also showed elevated levels of transforming growth factor β1 (TGF-β1), an inhibitor of keratinocyte proliferation, and of the cell cycle inhibitor p21 at telogen. Reduced expression of Ki67, a marker of cell proliferation, was noted at the onset of anagen, indicating impaired activation of the hair progenitor cells. These findings implicate NFI-C in the repression of TGF-β1 signaling during telogen stage, resulting in the delay of progenitor cell proliferation and hair follicle regeneration in NFI-C-deficient mice. Taken together with prior observations, these findings also designate NFI-C as a regulator of adult progenitor cell proliferation and of postnatal tissue growth or regeneration.
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Affiliation(s)
- Genta Plasari
- Institute of Biotechnology, University of Lausanne, 1015 Lausanne, Switzerland
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