1
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Gloriane C Luna H, Severino Imasa M, Juat N, Hernandez KV, May Sayo T, Cristal-Luna G, Marie Asur-Galang S, Bellengan M, John Duga K, Brian Buenaobra B, De Los Santos MI, Medina D, Samo J, Minerva Literal V, Andrew Bascos N, Sy-Naval S. Expression landscapes in non-small cell lung cancer shaped by the thyroid transcription factor 1. Lung Cancer 2023; 176:121-131. [PMID: 36634573 DOI: 10.1016/j.lungcan.2022.12.015] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2022] [Revised: 12/20/2022] [Accepted: 12/24/2022] [Indexed: 12/28/2022]
Abstract
TTF-1-expressing non-small cell lung cancer (NSCLC) is one of the most prevalent lung cancer types worldwide. However, theparadoxical activity of TTF-1 in both lung carcinogenesis and tumor suppression is believed to be context-dependentwhich calls for a deeper understanding about the pathological expression of TTF-1. In addition, the expression circuitry of TTF-1-target genes in NSCLC has not been well examined which necessitates to revisit the involvement of TTF-1- in a multitude of oncologic pathways. We used RNA-seq and clinical data of patients from The Cancer Genome Atlas (TCGA) and Genotype-Tissue Expression (GTEx), including ChIP-seq data from different NSCLC cell lines, and mapped the proteome of NSCLC tumor. Our analysis showed significant variability in TTF-1 expression among NSCLC,and further clarified that this variability is orchestrated at the transcriptional level. We also found that high TTF-1 expression could negatively influence the survival outcomes of stage 1 LUAD which may be attributed to growth factor receptor-driven activation of mitogenic and angiogenic pathways. Mechanistically, TTF-1 may also control the genes associated with pathways involved in acquired TKI drug resistance or response to immune checkpoint inhibitors. Lastly, proteome-based biomarker discovery in stage 1 LUAD showed that TTF-1 positivity is potentially associated with the upregulation of several oncogenes which includes interferon proteins, MUC1, STAT3, and EIF2AK2. Collectively, this study highlights the potential involvement of TTF-1 in cell proliferation, immune evasion, and angiogenesis in early-stage NSCLC.
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Affiliation(s)
- Herdee Gloriane C Luna
- Department of Internal Medicine, Lung Center of the Philippines, Quezon Ave, Diliman, Quezon City, Metro Manila 1100, Philippines; Department of Internal Medicine, National Kidney and Transplant Institute, East Avenue, Diliman, Quezon City 1101, Philippines.
| | - Marcelo Severino Imasa
- Department of Internal Medicine, Lung Center of the Philippines, Quezon Ave, Diliman, Quezon City, Metro Manila 1100, Philippines
| | - Necy Juat
- Department of Internal Medicine, National Kidney and Transplant Institute, East Avenue, Diliman, Quezon City 1101, Philippines
| | - Katherine V Hernandez
- Department of Internal Medicine, East Avenue Medical Center, East Ave, Diliman, Quezon City, Metro Manila 1100, Philippines
| | - Treah May Sayo
- Department of Internal Pathology, Lung Center of the Philippines, Quezon Ave, Diliman, Quezon City, Metro Manila 1100, Philippines
| | - Gloria Cristal-Luna
- Department of Internal Medicine, National Kidney and Transplant Institute, East Avenue, Diliman, Quezon City 1101, Philippines
| | - Sheena Marie Asur-Galang
- Clinical Proteomics for Cancer Initiative, Department of Science and Technology, Philippine Council for Health Research and Development, Philippines
| | - Mirasol Bellengan
- Clinical Proteomics for Cancer Initiative, Department of Science and Technology, Philippine Council for Health Research and Development, Philippines
| | - Kent John Duga
- Clinical Proteomics for Cancer Initiative, Department of Science and Technology, Philippine Council for Health Research and Development, Philippines
| | - Bien Brian Buenaobra
- Clinical Proteomics for Cancer Initiative, Department of Science and Technology, Philippine Council for Health Research and Development, Philippines
| | - Marvin I De Los Santos
- Clinical Proteomics for Cancer Initiative, Department of Science and Technology, Philippine Council for Health Research and Development, Philippines
| | - Daniel Medina
- Clinical Proteomics for Cancer Initiative, Department of Science and Technology, Philippine Council for Health Research and Development, Philippines
| | - Jamirah Samo
- Clinical Proteomics for Cancer Initiative, Department of Science and Technology, Philippine Council for Health Research and Development, Philippines
| | - Venus Minerva Literal
- Clinical Proteomics for Cancer Initiative, Department of Science and Technology, Philippine Council for Health Research and Development, Philippines
| | - Neil Andrew Bascos
- National Institute of Molecular Biology and Biotechnology, University of the Philippines - Diliman, Diliman, Quezon City, Metro Manila, Philippines; Protein, Proteomics and Metabolomics Facility, Philippine Genome Center, University of the Philippines System, Philippines
| | - Sullian Sy-Naval
- Department of Internal Medicine, Lung Center of the Philippines, Quezon Ave, Diliman, Quezon City, Metro Manila 1100, Philippines
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2
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O'Brien ME, Londino J, McGinnis M, Weathington N, Adair J, Suber T, Kagan V, Chen K, Zou C, Chen B, Bon J, Mallampalli RK. Tumor Necrosis Factor Alpha Regulates Skeletal Myogenesis by Inhibiting SP1 Interaction with cis-Acting Regulatory Elements within the Fbxl2 Gene Promoter. Mol Cell Biol 2020; 40:e00040-20. [PMID: 32205409 PMCID: PMC7261720 DOI: 10.1128/mcb.00040-20] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2020] [Accepted: 02/28/2020] [Indexed: 01/08/2023] Open
Abstract
FBXL2 is an important ubiquitin E3 ligase component that modulates inflammatory signaling and cell cycle progression, but its molecular regulation is largely unknown. Here, we show that tumor necrosis factor alpha (TNF-α), a critical cytokine linked to the inflammatory response during skeletal muscle regeneration, suppressed Fbxl2 mRNA expression in C2C12 myoblasts and triggered significant alterations in cell cycle, metabolic, and protein translation processes. Gene silencing of Fbxl2 in skeletal myoblasts resulted in increased proliferative responses characterized by activation of mitogen-activated protein (MAP) kinases and nuclear factor kappa B and decreased myogenic differentiation, as reflected by reduced expression of myogenin and impaired myotube formation. TNF-α did not destabilize the Fbxl2 transcript (half-life [t1/2], ∼10 h) but inhibited SP1 transactivation of its core promoter, localized to bp -160 to +42 within the proximal 5' flanking region of the Fbxl2 gene. Chromatin immunoprecipitation and gel shift studies indicated that SP1 interacted with the Fbxl2 promoter during cellular differentiation, an effect that was less pronounced during proliferation or after TNF-α exposure. TNF-α, via activation of JNK, mediated phosphorylation of SP1 that impaired its binding to the Fbxl2 promoter, resulting in reduced transcriptional activity. The results suggest that SP1 transcriptional activation of Fbxl2 is required for skeletal muscle differentiation, a process that is interrupted by a key proinflammatory myopathic cytokine.IMPORTANCE Skeletal muscle regeneration and repair involve the recruitment and proliferation of resident satellite cells that exit the cell cycle during the process of myogenic differentiation to form myofibers. We demonstrate that the ubiquitin E3 ligase subunit FBXL2 is essential for skeletal myogenesis through its important effects on cell cycle progression and cell proliferative signaling. Further, we characterize a new mechanism whereby sustained stimulation by a major proinflammatory cytokine, TNF-α, regulates skeletal myogenesis by inhibiting the interaction of SP1 with the Fbxl2 core promoter in proliferating myoblasts. Our findings contribute to the understanding of skeletal muscle regeneration through the identification of Fbxl2 as both a critical regulator of myogenic proliferative processes and a susceptible gene target during inflammatory stimulation by TNF-α in skeletal muscle. Modulation of Fbxl2 activity may have relevance to disorders of muscle wasting associated with sustained proinflammatory signaling.
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Affiliation(s)
- Michael E O'Brien
- Department of Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania, USA
| | - James Londino
- Pulmonary, Critical Care, and Sleep Medicine, The Ohio State University Wexner Medical Center, Davis Heart Lung Research Institute, Columbus, Ohio, USA
| | - Marcus McGinnis
- Department of Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania, USA
| | | | - Jessica Adair
- Pulmonary, Critical Care, and Sleep Medicine, The Ohio State University Wexner Medical Center, Davis Heart Lung Research Institute, Columbus, Ohio, USA
| | - Tomeka Suber
- Department of Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania, USA
| | - Valerian Kagan
- Department of Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania, USA
| | - Kong Chen
- Department of Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania, USA
| | - Chunbin Zou
- Department of Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania, USA
| | - Bill Chen
- Department of Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania, USA
| | - Jessica Bon
- Department of Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania, USA
| | - Rama K Mallampalli
- Pulmonary, Critical Care, and Sleep Medicine, The Ohio State University Wexner Medical Center, Davis Heart Lung Research Institute, Columbus, Ohio, USA
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3
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Delgado RN, Mansky B, Ahanger SH, Lu C, Andersen RE, Dou Y, Alvarez-Buylla A, Lim DA. Maintenance of neural stem cell positional identity by mixed-lineage leukemia 1. Science 2020; 368:48-53. [PMID: 32241942 DOI: 10.1126/science.aba5960] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2019] [Accepted: 03/09/2020] [Indexed: 12/22/2022]
Abstract
Neural stem cells (NSCs) in the developing and postnatal brain have distinct positional identities that dictate the types of neurons they generate. Although morphogens initially establish NSC positional identity in the neural tube, it is unclear how such regional differences are maintained as the forebrain grows much larger and more anatomically complex. We found that the maintenance of NSC positional identity in the murine brain requires a mixed-lineage leukemia 1 (Mll1)-dependent epigenetic memory system. After establishment by sonic hedgehog, ventral NSC identity became independent of this morphogen. Even transient MLL1 inhibition caused a durable loss of ventral identity, resulting in the generation of neurons with the characteristics of dorsal NSCs in vivo. Thus, spatial information provided by morphogens can be transitioned to epigenetic mechanisms that maintain regionally distinct developmental programs in the forebrain.
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Affiliation(s)
- Ryan N Delgado
- Department of Neurological Surgery, University of California, San Francisco, San Francisco, CA 94143, USA.,Eli and Edythe Broad Center of Regeneration Medicine and Stem Cell Research, University of California, San Francisco, San Francisco, CA 94143, USA.,Medical Scientist Training Program, University of California, San Francisco, San Francisco, CA 94143, USA.,Biomedical Sciences Graduate Program, University of California, San Francisco, San Francisco, CA 94143, USA
| | - Benjamin Mansky
- Department of Neurological Surgery, University of California, San Francisco, San Francisco, CA 94143, USA.,Eli and Edythe Broad Center of Regeneration Medicine and Stem Cell Research, University of California, San Francisco, San Francisco, CA 94143, USA.,Neuroscience Graduate Program, University of California, San Francisco, San Francisco, CA 94143, USA
| | - Sajad Hamid Ahanger
- Department of Neurological Surgery, University of California, San Francisco, San Francisco, CA 94143, USA.,Eli and Edythe Broad Center of Regeneration Medicine and Stem Cell Research, University of California, San Francisco, San Francisco, CA 94143, USA.,San Francisco Veterans Affairs Medical Center, San Francisco, CA 94121, USA
| | - Changqing Lu
- Department of Human Anatomy, West China School of Basic Medical Sciences and Forensic Medicine, Sichuan University, Chengdu 610041, Sichuan, P.R. China
| | - Rebecca E Andersen
- Department of Neurological Surgery, University of California, San Francisco, San Francisco, CA 94143, USA.,Eli and Edythe Broad Center of Regeneration Medicine and Stem Cell Research, University of California, San Francisco, San Francisco, CA 94143, USA.,Developmental and Stem Cell Biology Graduate Program, University of California, San Francisco, San Francisco, CA 94143, USA
| | - Yali Dou
- Department of Pathology, University of Michigan, Ann Arbor, MI 48109, USA
| | - Arturo Alvarez-Buylla
- Department of Neurological Surgery, University of California, San Francisco, San Francisco, CA 94143, USA.,Eli and Edythe Broad Center of Regeneration Medicine and Stem Cell Research, University of California, San Francisco, San Francisco, CA 94143, USA
| | - Daniel A Lim
- Department of Neurological Surgery, University of California, San Francisco, San Francisco, CA 94143, USA. .,Eli and Edythe Broad Center of Regeneration Medicine and Stem Cell Research, University of California, San Francisco, San Francisco, CA 94143, USA.,San Francisco Veterans Affairs Medical Center, San Francisco, CA 94121, USA
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4
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Natarajan K, Gangam K, Meganathan V, Gottipati KR, Mitchell C, Boggaram V. Organic dust inhibits surfactant protein expression by reducing thyroid transcription factor-1 levels in human lung epithelial cells. Innate Immun 2020; 25:118-131. [PMID: 30774012 PMCID: PMC6830861 DOI: 10.1177/1753425919827360] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Exposure to organic dust is a risk factor for the development of respiratory
diseases. Surfactant proteins (SP) reduce alveolar surface tension and modulate
innate immune responses to control lung inflammation. Therefore, changes in SP
levels could contribute to the development of organic-dust-induced respiratory
diseases. Because information on the effects of organic dust on SP levels is
lacking, we studied the effects of dust from a poultry farm on SP expression. We
found that dust extract reduced SP-A and SP-B mRNA and protein levels in H441
human lung epithelial cells by inhibiting their promoter activities, but did not
have any effect on SP-D protein levels. Dust extract also reduced SP-A and SP-C
levels in primary human alveolar epithelial cells. The inhibitory effects were
not due to LPS or protease activities present in dust extract or mediated via
oxidative stress, but were dependent on a heat-labile factor(s). Thyroid
transcription factor-1, a key transcriptional activator of SP expression, was
reduced in dust-extract-treated cells, indicating that its down-regulation
mediates inhibition of SP levels. Our study implies that down-regulation of SP
levels by organic dust could contribute to the development of lung inflammation
and respiratory diseases in humans.
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Affiliation(s)
- Kartiga Natarajan
- Department of Cellular and Molecular Biology, University of Texas Health Science Center at Tyler, USA
| | - Keerthi Gangam
- Department of Cellular and Molecular Biology, University of Texas Health Science Center at Tyler, USA
| | - Velmurugan Meganathan
- Department of Cellular and Molecular Biology, University of Texas Health Science Center at Tyler, USA
| | - Koteswara R Gottipati
- Department of Cellular and Molecular Biology, University of Texas Health Science Center at Tyler, USA
| | - Courtney Mitchell
- Department of Cellular and Molecular Biology, University of Texas Health Science Center at Tyler, USA
| | - Vijay Boggaram
- Department of Cellular and Molecular Biology, University of Texas Health Science Center at Tyler, USA
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5
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GLP-1 Analogue Liraglutide Enhances SP-A Expression in LPS-Induced Acute Lung Injury through the TTF-1 Signaling Pathway. Mediators Inflamm 2018; 2018:3601454. [PMID: 29950925 PMCID: PMC5987313 DOI: 10.1155/2018/3601454] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2017] [Revised: 03/01/2018] [Accepted: 03/28/2018] [Indexed: 02/05/2023] Open
Abstract
The reduction of pulmonary surfactant (PS) is essential for decreased pulmonary compliance and edema in acute lung injury (ALI). Thyroid transcription factor-1 (TTF-1) plays a major role in the regulation of surfactant protein-A (SP-A), the most abundant protein component of PS. Simultaneously, the glucagon-like peptide-1 (GLP-1) analogue can enhance SP-A expression in the lung. However, the underlying mechanism is still unknown. The purpose of this study was to explore whether liraglutide, a GLP-1 analogue, upregulates SP-A expression through the TTF-1 signaling pathway in ALI. In vivo, a murine model of ALI was induced by lipopolysaccharide (LPS). Pulmonary inflammation, edema, insulin level, ultrastructural changes in type II alveolar epithelial (ATII) cells, and SP-A and TTF-1 expression were analyzed. In vitro, rat ATII cells were obtained. SP-A and TTF-1 expression in cells was measured. ShRNA-TTF-1 transfection was performed to knock down TTF-1 expression. Our data showed that LPS-induced lung injury and increase in insulin level, and LPS-induced reduction of SP-A and TTF-1 expression in both the lung and cells, were significantly compromised by liraglutide. Furthermore, we also found that these effects of liraglutide were markedly blunted by shRNA-TTF-1. Taken together, our findings suggest that liraglutide enhances SP-A expression in ATII cells and attenuates pulmonary inflammation in LPS-induced ALI, most likely through the TTF-1 signaling pathway.
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6
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Delgado RN, Lim DA. Maintenance of Positional Identity of Neural Progenitors in the Embryonic and Postnatal Telencephalon. Front Mol Neurosci 2017; 10:373. [PMID: 29180952 PMCID: PMC5693875 DOI: 10.3389/fnmol.2017.00373] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2017] [Accepted: 10/26/2017] [Indexed: 12/27/2022] Open
Abstract
Throughout embryonic development and into postnatal life, regionally distinct populations of neural progenitor cells (NPCs) collectively generate the many different types of neurons that underlie the complex structure and function of the adult mammalian brain. At very early stages of telencephalic development, NPCs become organized into regional domains that each produce different subsets of neurons. This positional identity of NPCs relates to the regional expression of specific, fate-determining homeodomain transcription factors. As development progresses, the brain undergoes vast changes in both size and shape, yet important aspects of NPC positional identity persist even into the postnatal brain. How can NPC positional identity, which is established so early in brain development, endure the many dynamic, large-scale and complex changes that occur over a relatively long period of time? In this Perspective article, we review data and concepts derived from studies in Drosophila regarding the function of homeobox (Hox) genes, Polycomb group (PcG) and trithorax group (trxG) chromatin regulators. We then discuss how this knowledge may contribute to our understanding of the maintenance of positional identity of NPCs in the mammalian telencephalon. Similar to the axial body plan of Drosophila larvae, there is a segmental nature to NPC positional identity, with loss of specific homeodomain transcription factors causing homeotic-like shifts in brain development. Finally, we speculate about the role of mammalian PcG and trxG factors in the long-term maintenance of NPC positional identity and certain neurodevelopmental disorders.
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Affiliation(s)
- Ryan N Delgado
- Department of Neurological Surgery, University of California, San Francisco, San Francisco, CA,, United States.,Eli and Edythe Broad Center of Regeneration Medicine and Stem Cell Research, University of California, San Francisco, San Francisco, CA,, United States.,Biomedical Sciences Program, University of California, San Francisco, San Francisco, CA,, United States.,Medical Scientist Training Program, University of California, San Francisco, San Francisco, CA,, United States
| | - Daniel A Lim
- Department of Neurological Surgery, University of California, San Francisco, San Francisco, CA,, United States.,Eli and Edythe Broad Center of Regeneration Medicine and Stem Cell Research, University of California, San Francisco, San Francisco, CA,, United States.,San Francisco Veterans Affairs Medical Center, San Francisco, CA,, United States
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7
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Seyedrezazadeh E, Sabri A, Barzegari A, Kolahian S, Shahbazfar AA, Ansarin K, Vafa M, Sakhinia E. Dietary flavanones and citrus fruits influence cytokines and thyroid transcription factor-1 in an HDM-induced chronic asthma murine model. J Funct Foods 2016. [DOI: 10.1016/j.jff.2016.08.033] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022] Open
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8
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Malt EA, Juhasz K, Malt UF, Naumann T. A Role for the Transcription Factor Nk2 Homeobox 1 in Schizophrenia: Convergent Evidence from Animal and Human Studies. Front Behav Neurosci 2016; 10:59. [PMID: 27064909 PMCID: PMC4811959 DOI: 10.3389/fnbeh.2016.00059] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2015] [Accepted: 03/11/2016] [Indexed: 12/22/2022] Open
Abstract
Schizophrenia is a highly heritable disorder with diverse mental and somatic symptoms. The molecular mechanisms leading from genes to disease pathology in schizophrenia remain largely unknown. Genome-wide association studies (GWASs) have shown that common single-nucleotide polymorphisms associated with specific diseases are enriched in the recognition sequences of transcription factors that regulate physiological processes relevant to the disease. We have used a “bottom-up” approach and tracked a developmental trajectory from embryology to physiological processes and behavior and recognized that the transcription factor NK2 homeobox 1 (NKX2-1) possesses properties of particular interest for schizophrenia. NKX2-1 is selectively expressed from prenatal development to adulthood in the brain, thyroid gland, parathyroid gland, lungs, skin, and enteric ganglia, and has key functions at the interface of the brain, the endocrine-, and the immune system. In the developing brain, NKX2-1-expressing progenitor cells differentiate into distinct subclasses of forebrain GABAergic and cholinergic neurons, astrocytes, and oligodendrocytes. The transcription factor is highly expressed in mature limbic circuits related to context-dependent goal-directed patterns of behavior, social interaction and reproduction, fear responses, responses to light, and other homeostatic processes. It is essential for development and mature function of the thyroid gland and the respiratory system, and is involved in calcium metabolism and immune responses. NKX2-1 interacts with a number of genes identified as susceptibility genes for schizophrenia. We suggest that NKX2-1 may lie at the core of several dose dependent pathways that are dysregulated in schizophrenia. We correlate the symptoms seen in schizophrenia with the temporal and spatial activities of NKX2-1 in order to highlight promising future research areas.
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Affiliation(s)
- Eva A Malt
- Department of Adult Habilitation, Akershus University HospitalLørenskog, Norway; Institute of Clinical Medicine, Ahus Campus University of OsloOslo, Norway
| | - Katalin Juhasz
- Department of Adult Habilitation, Akershus University Hospital Lørenskog, Norway
| | - Ulrik F Malt
- Institute of Clinical Medicine, University of OsloOslo, Norway; Department of Research and Education, Institution of Oslo University HospitalOslo, Norway
| | - Thomas Naumann
- Centre of Anatomy, Institute of Cell Biology and Neurobiology, Charite Universitätsmedizin Berlin Berlin, Germany
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9
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Serum microRNA-365 in combination with its target gene TTF-1 as a non-invasive prognostic marker for non-small cell lung cancer. Biomed Pharmacother 2015; 75:185-90. [DOI: 10.1016/j.biopha.2015.07.026] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2015] [Accepted: 07/26/2015] [Indexed: 01/03/2023] Open
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10
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Marten E, Nielsen HC, Dammann CEL. Interdependent TTF1 - ErbB4 interactions are critical for surfactant protein-B homeostasis in primary mouse lung alveolar type II cells. J Cell Commun Signal 2015. [PMID: 26198867 DOI: 10.1007/s12079-015-0299-1] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023] Open
Abstract
ErbB4 receptor and thyroid transcription factor (TTF)-1 are important modulators of fetal alveolar type II (ATII) cell development and injury. ErbB4 is an upstream regulator of TTF-1, promoting its expression in MLE-12 cells, an ATII cell line. Both proteins are known to promote surfactant protein-B gene (SftpB) and protein (SP-B) expression, but their feedback interactions on each other are not known. We hypothesized that TTF-1 expression has a feedback effect on ErbB4 expression in an in-vitro model of isolated mouse ATII cells. We tested this hypothesis by analyzing the effects of overexpressing HER4 and Nkx2.1, the genes of ErbB4 and TTF-1 on TTF-1 and ErbB4 protein expression, respectively, as well as SP-B protein expression in primary fetal mouse lung ATII cells. Transient ErbB4 protein overexpression upregulated TTF-1 protein expression in primary fetal ATII cells, similarly to results previously shown in MLE-12 cells. Transient TTF-1 protein overexpression down regulated ErbB4 protein expression in both cell types. TTF-1 protein was upregulated in primary transgenic ErbB4-depleted adult ATII cells, however SP-B protein expression in these adult transgenic ATII cells was not affected by the absence of ErbB4. The observation that TTF-1 is upregulated in fetal ATII cells by ErbB4 overexpression and also in ErbB4-deleted adult ATII cells suggests additional factors interact with ErbB4 to regulate TTF-1 levels. We conclude that the interdependency of TTF-1 and ErbB4 is important for surfactant protein levels. The interactive regulation of ErbB4 and TTF-1 needs further elucidation.
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Affiliation(s)
- Elger Marten
- Division of Newborn Medicine, Floating Hospital for Children at Tufts Medical Center, 800 Washington St, Boston, MA, 02111, USA.,Hannover Medical School, Hannover, 30625, Germany
| | - Heber C Nielsen
- Division of Newborn Medicine, Floating Hospital for Children at Tufts Medical Center, 800 Washington St, Boston, MA, 02111, USA.,Sackler School for Biomedical Sciences, Tufts University, Boston, MA, 02111, USA
| | - Christiane E L Dammann
- Division of Newborn Medicine, Floating Hospital for Children at Tufts Medical Center, 800 Washington St, Boston, MA, 02111, USA. .,Hannover Medical School, Hannover, 30625, Germany. .,Sackler School for Biomedical Sciences, Tufts University, Boston, MA, 02111, USA.
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11
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Dietert K, Mundhenk L, Erickson NA, Reppe K, Hocke AC, Kummer W, Witzenrath M, Gruber AD. Murine CLCA5 is uniquely expressed in distinct niches of airway epithelial cells. Histochem Cell Biol 2014; 143:277-87. [PMID: 25212661 PMCID: PMC4317516 DOI: 10.1007/s00418-014-1279-x] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/03/2014] [Indexed: 11/30/2022]
Abstract
The murine mCLCA5 protein is a member of the chloride channel regulators, calcium-activated (CLCA) family and is suspected to play a role in airway mucus cell differentiation. Although mCLCA5 mRNA was previously found in total lung extracts, the expressing cells and functions in the naive murine respiratory tract are unknown. Therefore, mCLCA5 protein expression was identified by immunohistochemistry and confocal laser scanning microscopy using entire lung sections of naive mice. Moreover, we determined mRNA levels of functionally related genes (mClca3, mClca5, Muc5ac and Muc5b) and quantified mCLCA5-, mCLCA3- and CC10-positive cells and periodic acid-Schiff-positive mucus cells in naive, PBS-treated or Staphylococcus aureus-infected mice. We also investigated mCLCA5 protein expression in Streptococcus pneumoniae and influenza virus lung infection models. Finally, we determined species-specific differences in the expression patterns of the murine mCLCA5 and its human and porcine orthologs, hCLCA2 and pCLCA2. The mCLCA5 protein is uniquely expressed in highly select bronchial epithelial cells and submucosal glands in naive mice, consistent with anatomical locations of progenitor cell niches. Under conditions of challenge (PBS, S. aureus, S. pneumoniae, influenza virus), mRNA and protein expression strongly declined with protein recovery only in models retaining intact epithelial cells. In contrast to mice, human and porcine bronchial epithelial cells do not express their respective mCLCA5 orthologs and submucosal glands had fewer expressing cells, indicative of fundamental differences in mice versus humans and pigs.
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Affiliation(s)
- Kristina Dietert
- Department of Veterinary Pathology, Freie Universität Berlin, Berlin, Germany,
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12
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Herriges MJ, Swarr DT, Morley MP, Rathi KS, Peng T, Stewart KM, Morrisey EE. Long noncoding RNAs are spatially correlated with transcription factors and regulate lung development. Genes Dev 2014; 28:1363-79. [PMID: 24939938 PMCID: PMC4066405 DOI: 10.1101/gad.238782.114] [Citation(s) in RCA: 121] [Impact Index Per Article: 12.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
Long noncoding RNAs (lncRNAs) are thought to play important roles in regulating gene transcription, yet few have known biological functions. Using a conservative pipeline, Herriges et al. identify lncRNAs with key functions during mammalian development. Loss-of-function analyses show that two lncRNAs play distinct roles in endoderm development by controlling the expression of critical transcription factors and pathways, including retinoic acid signaling. The data demonstrate that lncRNAs regulate multiple aspects of gene transcription during foregut and lung endoderm development. Long noncoding RNAs (lncRNAs) are thought to play important roles in regulating gene transcription, but few have well-defined expression patterns or known biological functions during mammalian development. Using a conservative pipeline to identify lncRNAs that have important biological functions, we identified 363 lncRNAs in the lung and foregut endoderm. Importantly, we show that these lncRNAs are spatially correlated with transcription factors across the genome. In-depth expression analyses of lncRNAs with genomic loci adjacent to the critical transcription factors Nkx2.1, Gata6, Foxa2 (forkhead box a2), and Foxf1 mimic the expression patterns of their protein-coding neighbor. Loss-of-function analysis demonstrates that two lncRNAs, LL18/NANCI (Nkx2.1-associated noncoding intergenic RNA) and LL34, play distinct roles in endoderm development by controlling expression of critical developmental transcription factors and pathways, including retinoic acid signaling. In particular, we show that LL18/NANCI acts upstream of Nkx2.1 and downstream from Wnt signaling to regulate lung endoderm gene expression. These studies reveal that lncRNAs play an important role in foregut and lung endoderm development by regulating multiple aspects of gene transcription, often through regulation of transcription factor expression.
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Affiliation(s)
- Michael J Herriges
- Department of Cell and Developmental Biology, University of Pennsylvania, Philadelphia, Pennsylvania 19104, USA
| | - Daniel T Swarr
- Division of Neonatology, Division of Human Genetics, The Children's Hospital of Philadelphia, Philadelphia, Pennsylvania 19104, USA
| | | | | | | | | | - Edward E Morrisey
- Department of Cell and Developmental Biology, University of Pennsylvania, Philadelphia, Pennsylvania 19104, USA; Department of Medicine, Institute for Regenerative Medicine, Cardiovascular Institute, University of Pennsylvania, Philadelphia, Pennsylvania 19104, USA
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13
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Madurga A, Mizíková I, Ruiz-Camp J, Morty RE. Recent advances in late lung development and the pathogenesis of bronchopulmonary dysplasia. Am J Physiol Lung Cell Mol Physiol 2013; 305:L893-905. [PMID: 24213917 DOI: 10.1152/ajplung.00267.2013] [Citation(s) in RCA: 113] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
In contrast to early lung development, a process exemplified by the branching of the developing airways, the later development of the immature lung remains very poorly understood. A key event in late lung development is secondary septation, in which secondary septa arise from primary septa, creating a greater number of alveoli of a smaller size, which dramatically expands the surface area over which gas exchange can take place. Secondary septation, together with architectural changes to the vascular structure of the lung that minimize the distance between the inspired air and the blood, are the objectives of late lung development. The process of late lung development is disturbed in bronchopulmonary dysplasia (BPD), a disease of prematurely born infants in which the structural development of the alveoli is blunted as a consequence of inflammation, volutrauma, and oxygen toxicity. This review aims to highlight notable recent developments in our understanding of late lung development and the pathogenesis of BPD.
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Affiliation(s)
- Alicia Madurga
- Dept. of Lung Development and Remodelling, Max Planck Institute for Heart and Lung Research, Parkstrasse 1, D-61231 Bad Nauheim, Germany.
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14
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Zscheppang K, Giese U, Hoenzke S, Wiegel D, Dammann CEL. ErbB4 is an upstream regulator of TTF-1 fetal mouse lung type II cell development in vitro. BIOCHIMICA ET BIOPHYSICA ACTA-MOLECULAR CELL RESEARCH 2013; 1833:2690-2702. [PMID: 23845988 DOI: 10.1016/j.bbamcr.2013.06.030] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/11/2012] [Revised: 06/26/2013] [Accepted: 06/27/2013] [Indexed: 02/07/2023]
Abstract
TTF-1 is an important transcription factor in lung development and lung disease and is essential for lung cell differentiation, specifically surfactant protein (Sftp) expression. The molecular mechanisms that drive the expression and transcriptional control of TTF-1 are not fully understood. In the fetal lung, ErbB4 functions as a transcriptional co-factor and regulates the timely onset of fetal Sftp expression. We speculate that ErbB4 is an upstream regulator of TTF-1 and regulates Sftpb expression via this pathway in alveolar type II cells. Neuregulin-induced ErbB4 and TTF-1 signaling interactions were studied by co-immunoprecipitation and confocal microscopy. Overexpression of ErbB4 and TTF-1 was analyzed in its effect on cell viability, Sftpb expression, TTF-1 expression, and Sftpb and TTF-1 promoter activity. The effect of ErbB4 deletion and ErbB4 nuclear translocation on TTF-1 expression was studied in primary fetal type II epithelial cells, isolated from transgenic HER4(heart(-/-)) mice. ErbB4 ligand neuregulin induces ErbB4 and TTF-1 co-precipitation and nuclear colocalization. Combined ErbB4 and TTF-1 overexpression inhibits cell viability, while promoting Sftpb expression more than single overexpression of each protein. NRG stimulates TTF-1 expression in ErbB4-overexpressing epithelial cells, while this effect is absent in ErbB4-depleted cells. In primary fetal type II cells, ErbB4 nuclear translocation is critical for its regulation of TTF-1-induced Sftpb upregulation. TTF-1 overexpression did not overcome this important requirement. We conclude that ErbB4 is a critical upstream regulator of TTF-1 in type II epithelial cells and that this interaction is important for Sftpb regulation.
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Affiliation(s)
- Katja Zscheppang
- Department of Pediatrics, Hannover Medical School, Hannover 30625, Germany; Division of Newborn Medicine, Floating Hospital for Children at Tufts Medical Center, Boston, MA 02111, USA
| | - Ulrike Giese
- Department of Pediatrics, Hannover Medical School, Hannover 30625, Germany
| | - Stefan Hoenzke
- Division of Newborn Medicine, Floating Hospital for Children at Tufts Medical Center, Boston, MA 02111, USA
| | - Dorothea Wiegel
- Department of Pediatrics, Hannover Medical School, Hannover 30625, Germany; Division of Newborn Medicine, Floating Hospital for Children at Tufts Medical Center, Boston, MA 02111, USA
| | - Christiane E L Dammann
- Department of Pediatrics, Hannover Medical School, Hannover 30625, Germany; Division of Newborn Medicine, Floating Hospital for Children at Tufts Medical Center, Boston, MA 02111, USA; Sackler School for Graduate Biomedical Sciences, Tufts University, Boston, MA 02111, USA.
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15
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Tang K, Murano G, Wagner H, Nogueira L, Wagner PD, Tang A, Dalton ND, Gu Y, Peterson KL, Breen EC. Impaired exercise capacity and skeletal muscle function in a mouse model of pulmonary inflammation. J Appl Physiol (1985) 2013; 114:1340-50. [PMID: 23449936 DOI: 10.1152/japplphysiol.00607.2012] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
Abstract
Pulmonary TNFα has been linked to reduced exercise capacity in a subset of patients with moderate to severe chronic obstructive pulmonary disease (COPD). We hypothesized that prolonged, high expression of pulmonary TNFα impairs cardiac and skeletal muscle function, and both contribute to exercise limitation. Using a surfactant protein C promoter-TNFα construct, TNFα was overexpressed throughout life in mouse lungs (SP-C/TNFα+). TNFα levels in wild-type (WT) female serum and lung were two- and threefold higher than in WT male mice. In SP-C/TNFα+ mice, TNFα increased similarly in both sexes. Treadmill exercise was impaired only in male SP-C/TNFα+ mice. While increases in lung volume and airspace size induced by TNFα were comparable in both sexes, pulmonary hypertension along with lower body and muscle mass were evident only in male mice. Left ventricular (LV) function (cardiac output, stroke volume, LV maximal pressure, and LV maximal pressure dP/dt) was not altered by TNFα overexpression. Fatigue measured in isolated soleus and EDL was more rapid only in soleus of male SP-C/TNFα+ mice and accompanied by a loss of oxidative IIa fibers, citrate synthase activity, and PGC-1α mRNA and increase in atrogin-1 and MuRF1 expression also only in male mice. In situ gastrocnemius fatigue resistance, reflecting both oxygen availability and contractility, was decreased similarly in female and male SP-C/TNFα+ mice. These data indicate that male, but not female, mice overexpressing pulmonary TNFα are susceptible to exercise limitation, possibly due to muscle wasting and loss of the oxidative muscle phenotype, with protection in females possibly due to estrogen.
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Affiliation(s)
- Kechun Tang
- Department of Medicine, University of California, San Diego, La Jolla, California 92093-0623, USA
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16
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Li Y, Eggermont K, Vanslembrouck V, Verfaillie CM. NKX2-1 activation by SMAD2 signaling after definitive endoderm differentiation in human embryonic stem cell. Stem Cells Dev 2013; 22:1433-42. [PMID: 23259454 DOI: 10.1089/scd.2012.0620] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023] Open
Abstract
Expression of NKX2-1 is required to specify definitive endoderm to respiratory endoderm. However, the transcriptional regulation of NKX2-1 is not fully understood. Here we demonstrate that aside from specifying undifferentiated human embryonic stem cell (hESC) to definitive endoderm, high concentrations of Activin-A are also necessary and sufficient to induce hESC-derived definitive endodermal progeny to a FOXA2/NKX2-1/GATA6/PAX9 positive respiratory epithelial fate. Activin-A directly mediates the induction of NKX2-1 by interacting with ALK4, leading to phosphorylation of SMAD2, which binds directly to the NKX2-1 promoter and activates its expression. Activin-A can be replaced by GDF11 but not transforming growth factor β1. Addition of Wnt3a, SHH, FGF2, or BMP4 failed to induce NKX2-1. These results suggest that direct binding of Activin-A-responsive SMAD2 to the NKX2-1 promoter plays essential role during respiratory endoderm specification.
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Affiliation(s)
- Yong Li
- Interdepartmentaal Stamcelinstituut, Katholieke Universiteit Leuven, Leuven, Belgium
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17
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Varma S, Cao Y, Tagne JB, Lakshminarayanan M, Li J, Friedman TB, Morell RJ, Warburton D, Kotton DN, Ramirez MI. The transcription factors Grainyhead-like 2 and NK2-homeobox 1 form a regulatory loop that coordinates lung epithelial cell morphogenesis and differentiation. J Biol Chem 2012; 287:37282-95. [PMID: 22955271 DOI: 10.1074/jbc.m112.408401] [Citation(s) in RCA: 61] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
The Grainyhead family of transcription factors controls morphogenesis and differentiation of epithelial cell layers in multicellular organisms by regulating cell junction- and proliferation-related genes. Grainyhead-like 2 (Grhl2) is expressed in developing mouse lung epithelium and is required for normal lung organogenesis. The specific epithelial cells expressing Grhl2 and the genes regulated by Grhl2 in normal lungs are mostly unknown. In these studies we identified the NK2-homeobox 1 transcription factor (Nkx2-1) as a direct transcriptional target of Grhl2. By binding and transcriptional assays and by confocal microscopy we showed that these two transcription factors form a positive feedback loop in vivo and in cell lines and are co-expressed in lung bronchiolar and alveolar type II cells. The morphological changes observed in flattening lung alveolar type II cells in culture are associated with down-regulation of Grhl2 and Nkx2-1. Reduction of Grhl2 in lung epithelial cell lines results in lower expression levels of Nkx2-1 and of known Grhl2 target genes. By microarray analysis we identified that in addition to Cadherin1 and Claudin4, Grhl2 regulates other cell interaction genes such as semaphorins and their receptors, which also play a functional role in developing lung epithelium. Impaired collective cell migration observed in Grhl2 knockdown cell monolayers is associated with reduced expression of these genes and may contribute to the altered epithelial phenotype reported in Grhl2 mutant mice. Thus, Grhl2 functions at the nexus of a novel regulatory network, connecting lung epithelial cell identity, migration, and cell-cell interactions.
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Affiliation(s)
- Saaket Varma
- Pulmonary Center, Department of Medicine, Boston University School of Medicine, Boston, Massachusetts 02118, USA
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18
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Robinson AB, Stogsdill JA, Lewis JB, Wood TT, Reynolds PR. RAGE and tobacco smoke: insights into modeling chronic obstructive pulmonary disease. Front Physiol 2012; 3:301. [PMID: 22934052 PMCID: PMC3429072 DOI: 10.3389/fphys.2012.00301] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2012] [Accepted: 07/10/2012] [Indexed: 12/31/2022] Open
Abstract
Chronic obstructive pulmonary disease (COPD) is a progressive condition characterized by chronic airway inflammation and airspace remodeling, leading to airflow limitation that is not completely reversible. Smoking is the leading risk factor for compromised lung function stemming from COPD pathogenesis. First- and second-hand cigarette smoke contain thousands of constituents, including several carcinogens and cytotoxic chemicals that orchestrate chronic lung inflammation and destructive alveolar remodeling. Receptors for advanced glycation end-products (RAGE) are multi-ligand cell surface receptors primarily expressed by diverse lung cells. RAGE expression increases following cigarette smoke exposure and expression is elevated in the lungs of patients with COPD. RAGE is responsible in part for inducing pro-inflammatory signaling pathways that culminate in expression and secretion of several cytokines, chemokines, enzymes, and other mediators. In the current review, new transgenic mouse models that conditionally over-express RAGE in pulmonary epithelium are discussed. When RAGE is over-expressed throughout embryogenesis, apoptosis in the peripheral lung causes severe lung hypoplasia. Interestingly, apoptosis in RAGE transgenic mice occurs via conserved apoptotic pathways also known to function in advanced stages of COPD. RAGE over-expression in the adult lung models features of COPD including pronounced inflammation and loss of parenchymal tissue. Understanding the biological contributions of RAGE during cigarette smoke-induced inflammation may provide critically important insight into the pathology of COPD.
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Affiliation(s)
| | | | | | | | - Paul R. Reynolds
- Department of Physiology and Developmental Biology, Brigham Young UniversityProvo, UT, USA
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