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Happ JT, Arveseth CD, Bruystens J, Bertinetti D, Nelson IB, Olivieri C, Zhang J, Hedeen DS, Zhu JF, Capener JL, Bröckel JW, Vu L, King CC, Ruiz-Perez VL, Ge X, Veglia G, Herberg FW, Taylor SS, Myers BR. A PKA inhibitor motif within SMOOTHENED controls Hedgehog signal transduction. Nat Struct Mol Biol 2022; 29:990-999. [PMID: 36202993 PMCID: PMC9696579 DOI: 10.1038/s41594-022-00838-z] [Citation(s) in RCA: 25] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2021] [Accepted: 08/22/2022] [Indexed: 02/03/2023]
Abstract
The Hedgehog (Hh) cascade is central to development, tissue homeostasis and cancer. A pivotal step in Hh signal transduction is the activation of glioma-associated (GLI) transcription factors by the atypical G protein-coupled receptor (GPCR) SMOOTHENED (SMO). How SMO activates GLI remains unclear. Here we show that SMO uses a decoy substrate sequence to physically block the active site of the cAMP-dependent protein kinase (PKA) catalytic subunit (PKA-C) and extinguish its enzymatic activity. As a result, GLI is released from phosphorylation-induced inhibition. Using a combination of in vitro, cellular and organismal models, we demonstrate that interfering with SMO-PKA pseudosubstrate interactions prevents Hh signal transduction. The mechanism uncovered echoes one used by the Wnt cascade, revealing an unexpected similarity in how these two essential developmental and cancer pathways signal intracellularly. More broadly, our findings define a mode of GPCR-PKA communication that may be harnessed by a range of membrane receptors and kinases.
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Affiliation(s)
- John T Happ
- Department of Oncological Sciences, Department of Biochemistry, and Department of Bioengineering, University of Utah School of Medicine, Salt Lake City, UT, USA
| | - Corvin D Arveseth
- Department of Oncological Sciences, Department of Biochemistry, and Department of Bioengineering, University of Utah School of Medicine, Salt Lake City, UT, USA
- Washington University School of Medicine, St. Louis, MO, USA
| | - Jessica Bruystens
- Department of Pharmacology, University of California, San Diego, La Jolla, CA, USA
| | - Daniela Bertinetti
- Institute for Biology, Department of Biochemistry, University of Kassel, Kassel, Germany
| | - Isaac B Nelson
- Department of Oncological Sciences, Department of Biochemistry, and Department of Bioengineering, University of Utah School of Medicine, Salt Lake City, UT, USA
| | - Cristina Olivieri
- Department of Biochemistry, Molecular Biology, and Biophysics, University of Minnesota, Minneapolis, MN, USA
| | - Jingyi Zhang
- Department of Molecular and Cell Biology, School of Natural Sciences, University of California, Merced, CA, USA
| | - Danielle S Hedeen
- Department of Oncological Sciences, Department of Biochemistry, and Department of Bioengineering, University of Utah School of Medicine, Salt Lake City, UT, USA
| | - Ju-Fen Zhu
- Department of Oncological Sciences, Department of Biochemistry, and Department of Bioengineering, University of Utah School of Medicine, Salt Lake City, UT, USA
| | - Jacob L Capener
- Department of Oncological Sciences, Department of Biochemistry, and Department of Bioengineering, University of Utah School of Medicine, Salt Lake City, UT, USA
- Biological and Biomedical Sciences Program, University of North Carolina, Chapel Hill, NC, USA
| | - Jan W Bröckel
- Institute for Biology, Department of Biochemistry, University of Kassel, Kassel, Germany
| | - Lily Vu
- Department of Neurobiology, University of California, San Diego, La Jolla, CA, USA
| | - C C King
- Department of Pharmacology, University of California, San Diego, La Jolla, CA, USA
- Department of Chemistry and Biochemistry, University of California, San Diego, La Jolla, CA, USA
| | - Victor L Ruiz-Perez
- Instituto de Investigaciones Biomédicas 'Alberto Sols,' Consejo Superior de Investigaciones Científicas (CSIC), Universidad Autónoma de Madrid, Madrid, Spain
- CIBER de Enfermedades Raras (CIBERER), Instituto de Salud Carlos III (ISCIII), Madrid, Spain
| | - Xuecai Ge
- Department of Molecular and Cell Biology, School of Natural Sciences, University of California, Merced, CA, USA
| | - Gianluigi Veglia
- Department of Biochemistry, Molecular Biology, and Biophysics, University of Minnesota, Minneapolis, MN, USA
| | - Friedrich W Herberg
- Institute for Biology, Department of Biochemistry, University of Kassel, Kassel, Germany
| | - Susan S Taylor
- Department of Pharmacology, University of California, San Diego, La Jolla, CA, USA.
- Department of Chemistry and Biochemistry, University of California, San Diego, La Jolla, CA, USA.
| | - Benjamin R Myers
- Department of Oncological Sciences, Department of Biochemistry, and Department of Bioengineering, University of Utah School of Medicine, Salt Lake City, UT, USA.
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Swiderska-Syn M, Mir-Pedrol J, Oles A, Schleuger O, Salvador AD, Greiner SM, Seward C, Yang F, Babcock BR, Shen C, Wynn DT, Sanchez-Mejias A, Gershon TR, Martin V, McCrea HJ, Lindsey KG, Krieg C, Rodriguez-Blanco J. Noncanonical activation of GLI signaling in SOX2 + cells drives medulloblastoma relapse. SCIENCE ADVANCES 2022; 8:eabj9138. [PMID: 35857834 PMCID: PMC9299538 DOI: 10.1126/sciadv.abj9138] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/09/2021] [Accepted: 06/03/2022] [Indexed: 05/04/2023]
Abstract
SRY (sex determining region Y)-box 2 (SOX2)-labeled cells play key roles in chemoresistance and tumor relapse; thus, it is critical to elucidate the mechanisms propagating them. Single-cell transcriptomic analyses of the most common malignant pediatric brain tumor, medulloblastoma (MB), revealed the existence of astrocytic Sox2+ cells expressing sonic hedgehog (SHH) signaling biomarkers. Treatment with vismodegib, an SHH inhibitor that acts on Smoothened (Smo), led to increases in astrocyte-like Sox2+ cells. Using SOX2-enriched MB cultures, we observed that SOX2+ cells required SHH signaling to propagate, and unlike in the proliferative tumor bulk, the SHH pathway was activated in these cells downstream of Smo in an MYC-dependent manner. Functionally different GLI inhibitors depleted vismodegib-resistant SOX2+ cells from MB tissues, reduced their ability to further engraft in vivo, and increased symptom-free survival. Our results emphasize the promise of therapies targeting GLI to deplete SOX2+ cells and provide stable tumor remission.
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Affiliation(s)
- Marzena Swiderska-Syn
- Darby Children’s Research Institute, Department of Pediatrics, Medical University of South Carolina, Charleston, SC 29425, USA
| | - Júlia Mir-Pedrol
- Department of Experimental and Health Sciences, Pompeu Fabra University, Barcelona 08002, Spain
| | - Alexander Oles
- Darby Children’s Research Institute, Department of Pediatrics, Medical University of South Carolina, Charleston, SC 29425, USA
| | - Olga Schleuger
- Darby Children’s Research Institute, Department of Pediatrics, Medical University of South Carolina, Charleston, SC 29425, USA
| | - April D. Salvador
- Darby Children’s Research Institute, Department of Pediatrics, Medical University of South Carolina, Charleston, SC 29425, USA
| | - Sean M. Greiner
- Darby Children’s Research Institute, Department of Pediatrics, Medical University of South Carolina, Charleston, SC 29425, USA
| | - Cara Seward
- Darby Children’s Research Institute, Department of Pediatrics, Medical University of South Carolina, Charleston, SC 29425, USA
| | - Fan Yang
- Molecular Oncology Program, The Dewitt Daughtry Family Department of Surgery, University of Miami, Miami, FL 33136, USA
| | - Benjamin R. Babcock
- Lowance Center for Human Immunology, Department of Medicine, Emory University, Atlanta, GA 30322, USA
- Department of Neurology, University of North Carolina School of Medicine, Chapel Hill, NC 27599, USA
| | - Chen Shen
- Department of Oncology, Lombardi Comprehensive Cancer Center, Georgetown University, Washington, DC 20057, USA
| | - Daniel T. Wynn
- Department of Oncology, Lombardi Comprehensive Cancer Center, Georgetown University, Washington, DC 20057, USA
| | - Avencia Sanchez-Mejias
- Department of Experimental and Health Sciences, Pompeu Fabra University, Barcelona 08002, Spain
| | - Timothy R. Gershon
- Department of Neurology, University of North Carolina School of Medicine, Chapel Hill, NC 27599, USA
| | - Vanesa Martin
- Department of Anatomy and Cell Biology, University of Oviedo, Oviedo, Asturias 33006, Spain
| | - Heather J. McCrea
- Department of Clinical Neurological Surgery, University of Miami, Miami, FL 33136, USA
| | - Kathryn G. Lindsey
- Department of Pathology and Laboratory Medicine, Medical University of South Carolina, Charleston, SC 29425, USA
| | - Carsten Krieg
- Department of Pathology and Laboratory Medicine, Medical University of South Carolina, Charleston, SC 29425, USA
| | - Jezabel Rodriguez-Blanco
- Darby Children’s Research Institute, Department of Pediatrics, Medical University of South Carolina, Charleston, SC 29425, USA
- Hollings Cancer Center, Medical University of South Carolina, Charleston, SC 29425, USA
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3
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Matrix stiffness drives stromal autophagy and promotes formation of a protumorigenic niche. Proc Natl Acad Sci U S A 2021; 118:2105367118. [PMID: 34588305 DOI: 10.1073/pnas.2105367118] [Citation(s) in RCA: 46] [Impact Index Per Article: 15.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/01/2021] [Indexed: 01/04/2023] Open
Abstract
Increased stiffness of solid tissues has long been recognized as a diagnostic feature of several pathologies, most notably malignant diseases. In fact, it is now well established that elevated tissue rigidity enhances disease progression and aggressiveness and is associated with a poor prognosis in patients as documented, for instance, for lung fibrosis or the highly desmoplastic cancer of the pancreas. The underlying mechanisms of the interplay between physical properties and cellular behavior are, however, not very well understood. Here, we have found that switching culture conditions from soft to stiff substrates is sufficient to evoke (macro) autophagy in various fibroblast types. Mechanistically, this is brought about by stiffness-sensing through an Integrin αV-focal adhesion kinase module resulting in sequestration and posttranslational stabilization of the metabolic master regulator AMPKα at focal adhesions, leading to the subsequent induction of autophagy. Importantly, stiffness-induced autophagy in stromal cells such as fibroblasts and stellate cells critically supports growth of adjacent cancer cells in vitro and in vivo. This process is Integrin αV dependent, opening possibilities for targeting tumor-stroma crosstalk. Our data thus reveal that the mere change in mechanical tissue properties is sufficient to metabolically reprogram stromal cell populations, generating a tumor-supportive metabolic niche.
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Koeniger A, Brichkina A, Nee I, Dempwolff L, Hupfer A, Galperin I, Finkernagel F, Nist A, Stiewe T, Adhikary T, Diederich W, Lauth M. Activation of Cilia-Independent Hedgehog/GLI1 Signaling as a Novel Concept for Neuroblastoma Therapy. Cancers (Basel) 2021; 13:cancers13081908. [PMID: 33921042 PMCID: PMC8071409 DOI: 10.3390/cancers13081908] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2021] [Revised: 04/12/2021] [Accepted: 04/13/2021] [Indexed: 11/16/2022] Open
Abstract
Simple Summary Elevated GLI1 expression levels are associated with improved survival in NB patients and GLI1 overexpression exerts tumor-suppressive traits in cultured NB cells. However, NB cells are protected from increased GLI1 levels as they have lost the ability to form primary cilia and transduce Hedgehog signals. This study identifies an isoxazole (ISX) molecule with primary cilia-independent GLI1-activating properties, which blocks NB cell growth. Mechanistically, ISX combines the removal of GLI3 repressor and the inhibition of class I HDACs, providing proof-of-principle evidence that small molecule-mediated activation of GLI1 could be harnessed therapeutically in the future. Abstract Although being rare in absolute numbers, neuroblastoma (NB) represents the most frequent solid tumor in infants and young children. Therapy options and prognosis are comparably good for NB patients except for the high risk stage 4 class. Particularly in adolescent patients with certain genetic alterations, 5-year survival rates can drop below 30%, necessitating the development of novel therapy approaches. The developmentally important Hedgehog (Hh) pathway is involved in neural crest differentiation, the cell type being causal in the etiology of NB. However, and in contrast to its function in some other cancer types, Hedgehog signaling and its transcription factor GLI1 exert tumor-suppressive functions in NB, rendering GLI1 an interesting new candidate for anti-NB therapy. Unfortunately, the therapeutic concept of pharmacological Hh/GLI1 pathway activation is difficult to implement as NB cells have lost primary cilia, essential organelles for Hh perception and activation. In order to bypass this bottleneck, we have identified a GLI1-activating small molecule which stimulates endogenous GLI1 production without the need for upstream Hh pathway elements such as Smoothened or primary cilia. This isoxazole compound potently abrogates NB cell proliferation and might serve as a starting point for the development of a novel class of NB-suppressive molecules.
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Affiliation(s)
- Anke Koeniger
- Center for Tumor- and Immune Biology, Department of Gastroenterology, Philipps University Marburg, 35043 Marburg, Germany; (A.K.); (A.B.); (A.H.); (I.G.)
| | - Anna Brichkina
- Center for Tumor- and Immune Biology, Department of Gastroenterology, Philipps University Marburg, 35043 Marburg, Germany; (A.K.); (A.B.); (A.H.); (I.G.)
| | - Iris Nee
- Department of Medicinal Chemistry and Center for Tumor- and Immune Biology, Philipps University Marburg, 35043 Marburg, Germany; (I.N.); (L.D.); (W.D.)
| | - Lukas Dempwolff
- Department of Medicinal Chemistry and Center for Tumor- and Immune Biology, Philipps University Marburg, 35043 Marburg, Germany; (I.N.); (L.D.); (W.D.)
| | - Anna Hupfer
- Center for Tumor- and Immune Biology, Department of Gastroenterology, Philipps University Marburg, 35043 Marburg, Germany; (A.K.); (A.B.); (A.H.); (I.G.)
| | - Ilya Galperin
- Center for Tumor- and Immune Biology, Department of Gastroenterology, Philipps University Marburg, 35043 Marburg, Germany; (A.K.); (A.B.); (A.H.); (I.G.)
| | - Florian Finkernagel
- Center for Tumor- and Immune Biology, Bioinformatics Core Facility, Philipps University Marburg, 35043 Marburg, Germany;
| | - Andrea Nist
- Member of the German Center for Lung Research (DZL), Center for Tumor- and Immune Biology, Genomics Core Facility, Institute of Molecular Oncology, Philipps University Marburg, 35043 Marburg, Germany; (A.N.); (T.S.)
| | - Thorsten Stiewe
- Member of the German Center for Lung Research (DZL), Center for Tumor- and Immune Biology, Genomics Core Facility, Institute of Molecular Oncology, Philipps University Marburg, 35043 Marburg, Germany; (A.N.); (T.S.)
| | - Till Adhikary
- Institute for Biomedical Informatics and Biostatistics, Philipps University Marburg, 35043 Marburg, Germany;
| | - Wibke Diederich
- Department of Medicinal Chemistry and Center for Tumor- and Immune Biology, Philipps University Marburg, 35043 Marburg, Germany; (I.N.); (L.D.); (W.D.)
- Core Facility Medicinal Chemistry, Philipps University Marburg, 35043 Marburg, Germany
| | - Matthias Lauth
- Center for Tumor- and Immune Biology, Department of Gastroenterology, Philipps University Marburg, 35043 Marburg, Germany; (A.K.); (A.B.); (A.H.); (I.G.)
- Correspondence:
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5
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Arveseth CD, Happ JT, Hedeen DS, Zhu JF, Capener JL, Klatt Shaw D, Deshpande I, Liang J, Xu J, Stubben SL, Nelson IB, Walker MF, Kawakami K, Inoue A, Krogan NJ, Grunwald DJ, Hüttenhain R, Manglik A, Myers BR. Smoothened transduces Hedgehog signals via activity-dependent sequestration of PKA catalytic subunits. PLoS Biol 2021; 19:e3001191. [PMID: 33886552 PMCID: PMC8096101 DOI: 10.1371/journal.pbio.3001191] [Citation(s) in RCA: 37] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2020] [Revised: 05/04/2021] [Accepted: 03/16/2021] [Indexed: 12/13/2022] Open
Abstract
The Hedgehog (Hh) pathway is essential for organ development, homeostasis, and regeneration. Dysfunction of this cascade drives several cancers. To control expression of pathway target genes, the G protein-coupled receptor (GPCR) Smoothened (SMO) activates glioma-associated (GLI) transcription factors via an unknown mechanism. Here, we show that, rather than conforming to traditional GPCR signaling paradigms, SMO activates GLI by binding and sequestering protein kinase A (PKA) catalytic subunits at the membrane. This sequestration, triggered by GPCR kinase (GRK)-mediated phosphorylation of SMO intracellular domains, prevents PKA from phosphorylating soluble substrates, releasing GLI from PKA-mediated inhibition. Our work provides a mechanism directly linking Hh signal transduction at the membrane to GLI transcription in the nucleus. This process is more fundamentally similar between species than prevailing hypotheses suggest. The mechanism described here may apply broadly to other GPCR- and PKA-containing cascades in diverse areas of biology.
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Affiliation(s)
- Corvin D. Arveseth
- Department of Oncological Sciences, Department of Biochemistry, Department of Bioengineering, University of Utah School of Medicine, Salt Lake City, Utah, United States of America
| | - John T. Happ
- Department of Oncological Sciences, Department of Biochemistry, Department of Bioengineering, University of Utah School of Medicine, Salt Lake City, Utah, United States of America
| | - Danielle S. Hedeen
- Department of Oncological Sciences, Department of Biochemistry, Department of Bioengineering, University of Utah School of Medicine, Salt Lake City, Utah, United States of America
| | - Ju-Fen Zhu
- Department of Oncological Sciences, Department of Biochemistry, Department of Bioengineering, University of Utah School of Medicine, Salt Lake City, Utah, United States of America
| | - Jacob L. Capener
- Department of Oncological Sciences, Department of Biochemistry, Department of Bioengineering, University of Utah School of Medicine, Salt Lake City, Utah, United States of America
| | - Dana Klatt Shaw
- Department of Human Genetics, University of Utah School of Medicine, Salt Lake City, Utah, United States of America
| | - Ishan Deshpande
- Department of Pharmaceutical Chemistry, Department of Anaesthesia and Perioperative Care, University of California, San Francisco, California, United States of America
| | - Jiahao Liang
- Department of Pharmaceutical Chemistry, Department of Anaesthesia and Perioperative Care, University of California, San Francisco, California, United States of America
| | - Jiewei Xu
- Department of Cellular and Molecular Pharmacology, Quantitative Biosciences Institute, University of California, San Francisco, California, United States of America
- J. David Gladstone Institutes, San Francisco, California, United States of America
| | - Sara L. Stubben
- Department of Oncological Sciences, Department of Biochemistry, Department of Bioengineering, University of Utah School of Medicine, Salt Lake City, Utah, United States of America
| | - Isaac B. Nelson
- Department of Oncological Sciences, Department of Biochemistry, Department of Bioengineering, University of Utah School of Medicine, Salt Lake City, Utah, United States of America
| | - Madison F. Walker
- Department of Oncological Sciences, Department of Biochemistry, Department of Bioengineering, University of Utah School of Medicine, Salt Lake City, Utah, United States of America
| | - Kouki Kawakami
- Graduate School of Pharmaceutical Sciences, Tohoku University, Sendai, Miyagi, Japan
| | - Asuka Inoue
- Graduate School of Pharmaceutical Sciences, Tohoku University, Sendai, Miyagi, Japan
| | - Nevan J. Krogan
- Department of Cellular and Molecular Pharmacology, Quantitative Biosciences Institute, University of California, San Francisco, California, United States of America
- J. David Gladstone Institutes, San Francisco, California, United States of America
| | - David J. Grunwald
- Department of Human Genetics, University of Utah School of Medicine, Salt Lake City, Utah, United States of America
| | - Ruth Hüttenhain
- Department of Cellular and Molecular Pharmacology, Quantitative Biosciences Institute, University of California, San Francisco, California, United States of America
- J. David Gladstone Institutes, San Francisco, California, United States of America
| | - Aashish Manglik
- Department of Pharmaceutical Chemistry, Department of Anaesthesia and Perioperative Care, University of California, San Francisco, California, United States of America
| | - Benjamin R. Myers
- Department of Oncological Sciences, Department of Biochemistry, Department of Bioengineering, University of Utah School of Medicine, Salt Lake City, Utah, United States of America
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6
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Hupfer A, Brichkina A, Adhikary T, Lauth M. The mammalian Hedgehog pathway is modulated by ANP32 proteins. Biochem Biophys Res Commun 2021; 553:78-84. [PMID: 33761414 DOI: 10.1016/j.bbrc.2021.03.027] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2021] [Accepted: 03/05/2021] [Indexed: 12/29/2022]
Abstract
Medulloblastoma (MB) is the most common malignant brain tumor in children. Transcriptional profiling has so far delineated four major MB subgroups of which one is driven by uncontrolled Hedgehog (Hh) signaling (SHH-MB). This pathway is amenable to drug targeting, yet clinically approved compounds exclusively target the transmembrane component Smoothened (SMO). Unfortunately, drug resistance against SMO inhibitors is encountered frequently, making the identification of novel Hh pathway components mandatory, which could serve as novel drug targets in the future. Here, we have used MB as a tool to delineate novel modulators of Hh signaling and have identified the Acidic Nuclear Phosphoprotein 32 (ANP32) family of proteins as novel regulators. The expression of all three family members (ANP32A, ANP32B, ANP32E) is increased in Hh-induced MB and their expression level is negatively associated with overall survival in SHH-MB patients. Mechanistically, we could find that ANP32 proteins function as positive modulators of mammalian Hh signaling upstream of GLI transcription factors. These findings add hitherto unknown regulators to the mammalian Hh signaling cascade and might spur future translational efforts to combat Hh-driven malignancies.
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Affiliation(s)
- Anna Hupfer
- Philipps University Marburg, Center for Tumor- and Immune Biology (ZTI), Clinics of Gastroenterology, Endocrinology, Metabolism and Infectiology, Germany
| | - Anna Brichkina
- Philipps University Marburg, Center for Tumor- and Immune Biology (ZTI), Clinics of Gastroenterology, Endocrinology, Metabolism and Infectiology, Germany
| | - Till Adhikary
- Philipps University Marburg, Center for Tumor Biology and Immunology (ZTI), Institute of Medical Bioinformatics and Biostatistics, Institute of Molecular Biology and Tumor Research, Germany
| | - Matthias Lauth
- Philipps University Marburg, Center for Tumor- and Immune Biology (ZTI), Clinics of Gastroenterology, Endocrinology, Metabolism and Infectiology, Germany.
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Hom ME, Ondrus AE, Sakata-Kato T, Rack PG, Chen JK. Bicyclic Imidazolium Inhibitors of Gli Transcription Factor Activity. ChemMedChem 2020; 15:1044-1049. [PMID: 32268014 PMCID: PMC7311267 DOI: 10.1002/cmdc.202000169] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2020] [Indexed: 12/16/2022]
Abstract
Gli transcription factors within the Hedgehog (Hh) signaling pathway direct key events in mammalian development and promote a number of human cancers. Current therapies for Gli-driven tumors target Smoothened (SMO), a G protein-coupled receptor-like protein that functions upstream in the Hh pathway. Although these drugs can have remarkable clinical efficacy, mutations in SMO and downstream Hh pathway components frequently lead to chemoresistance. In principle, therapies that act at the level of Gli proteins, through direct or indirect mechanisms, would be more efficacious. We therefore screened 325 120 compounds for their ability to block the constitutive Gli activity induced by loss of Suppressor of Fused (SUFU), a scaffolding protein that directly inhibits Gli function. Our studies reveal a family of bicyclic imidazolium derivatives that can inhibit Gli-dependent transcription without affecting the ciliary trafficking or proteolytic processing of these transcription factors. We anticipate that these chemical antagonists will be valuable tools for investigating the mechanisms of Gli regulation and developing new strategies for targeting Gli-driven cancers.
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Affiliation(s)
- Marisa E Hom
- Department of Chemical and Systems Biology, Stanford University, 269 Campus Dr., CCSR 3155, Stanford, CA 94305, USA
| | - Alison E Ondrus
- Department of Chemical and Systems Biology, Stanford University, 269 Campus Dr., CCSR 3155, Stanford, CA 94305, USA
- Present address: Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, CA 91125, USA
| | - Tomoyo Sakata-Kato
- Department of Chemical and Systems Biology, Stanford University, 269 Campus Dr., CCSR 3155, Stanford, CA 94305, USA
- Present address: Global Health Drug Discovery Institute, Beijing, 100192, China
| | - Paul G Rack
- Department of Chemical and Systems Biology, Stanford University, 269 Campus Dr., CCSR 3155, Stanford, CA 94305, USA
- Present address: Thermo Fisher Scientific, Carlsbad, CA 92008, USA
| | - James K Chen
- Department of Chemical and Systems Biology, Stanford University, 269 Campus Dr., CCSR 3155, Stanford, CA 94305, USA
- Department of Developmental Biology, Stanford University, 269 Campus Dr., CCSR 3155, Stanford, CA 94305, USA
- Department of Chemistry, Stanford University, 269 Campus Dr., CCSR 3155, Stanford, CA 94305, USA
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8
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Everson JL, Sun MR, Fink DM, Heyne GW, Melberg CG, Nelson KF, Doroodchi P, Colopy LJ, Ulschmid CM, Martin AA, McLaughlin MT, Lipinski RJ. Developmental Toxicity Assessment of Piperonyl Butoxide Exposure Targeting Sonic Hedgehog Signaling and Forebrain and Face Morphogenesis in the Mouse: An in Vitro and in Vivo Study. ENVIRONMENTAL HEALTH PERSPECTIVES 2019; 127:107006. [PMID: 31642701 PMCID: PMC6867268 DOI: 10.1289/ehp5260] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/15/2023]
Abstract
BACKGROUND Piperonyl butoxide (PBO) is a pesticide synergist used in residential, commercial, and agricultural settings. PBO was recently found to inhibit Sonic hedgehog (Shh) signaling, a key developmental regulatory pathway. Disruption of Shh signaling is linked to birth defects, including holoprosencephaly (HPE), a malformation of the forebrain and face thought to result from complex gene-environment interactions. OBJECTIVES The impact of PBO on Shh signaling in vitro and forebrain and face development in vivo was examined. METHODS The influence of PBO on Shh pathway transduction was assayed in mouse and human cell lines. To examine its teratogenic potential, a single dose of PBO (22-1,800mg/kg) was administered by oral gavage to C57BL/6J mice at gestational day 7.75, targeting the critical period for HPE. Gene-environment interactions were investigated using Shh+/- mice, which model human HPE-associated genetic mutations. RESULTS PBO attenuated Shh signaling in vitro through a mechanism similar to that of the known teratogen cyclopamine. In utero PBO exposure caused characteristic HPE facial dysmorphology including dose-dependent midface hypoplasia and hypotelorism, with a lowest observable effect level of 67mg/kg. Median forebrain deficiency characteristic of HPE was observed in severely affected animals, whereas all effective doses disrupted development of Shh-dependent transient forebrain structures that generate cortical interneurons. Normally silent heterozygous Shh null mutations exacerbated PBO teratogenicity at all doses tested, including 33mg/kg. DISCUSSION These findings demonstrate that prenatal PBO exposure can cause overt forebrain and face malformations or neurodevelopmental disruptions with subtle or no craniofacial dysmorphology in mice. By targeting Shh signaling as a sensitive mechanism of action and examining gene-environment interactions, this study defined a lowest observable effect level for PBO developmental toxicity in mice more than 30-fold lower than previously recognized. Human exposure to PBO and its potential contribution to etiologically complex birth defects should be rigorously examined. https://doi.org/10.1289/EHP5260.
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Affiliation(s)
- Joshua L. Everson
- Department of Comparative Biosciences, School of Veterinary Medicine, University of Wisconsin-Madison, Madison, Wisconsin, USA
- Molecular and Environmental Toxicology Center, University of Wisconsin-Madison, Madison, Wisconsin, USA
| | - Miranda R. Sun
- Department of Comparative Biosciences, School of Veterinary Medicine, University of Wisconsin-Madison, Madison, Wisconsin, USA
| | - Dustin M. Fink
- Department of Comparative Biosciences, School of Veterinary Medicine, University of Wisconsin-Madison, Madison, Wisconsin, USA
| | - Galen W. Heyne
- Department of Comparative Biosciences, School of Veterinary Medicine, University of Wisconsin-Madison, Madison, Wisconsin, USA
| | - Cal G. Melberg
- Department of Comparative Biosciences, School of Veterinary Medicine, University of Wisconsin-Madison, Madison, Wisconsin, USA
| | - Kia F. Nelson
- Department of Comparative Biosciences, School of Veterinary Medicine, University of Wisconsin-Madison, Madison, Wisconsin, USA
| | - Padydeh Doroodchi
- Department of Comparative Biosciences, School of Veterinary Medicine, University of Wisconsin-Madison, Madison, Wisconsin, USA
| | - Lydia J. Colopy
- Department of Comparative Biosciences, School of Veterinary Medicine, University of Wisconsin-Madison, Madison, Wisconsin, USA
| | - Caden M. Ulschmid
- Department of Comparative Biosciences, School of Veterinary Medicine, University of Wisconsin-Madison, Madison, Wisconsin, USA
| | - Alexander A. Martin
- Department of Comparative Biosciences, School of Veterinary Medicine, University of Wisconsin-Madison, Madison, Wisconsin, USA
| | - Matthew T. McLaughlin
- Department of Comparative Biosciences, School of Veterinary Medicine, University of Wisconsin-Madison, Madison, Wisconsin, USA
| | - Robert J. Lipinski
- Department of Comparative Biosciences, School of Veterinary Medicine, University of Wisconsin-Madison, Madison, Wisconsin, USA
- Molecular and Environmental Toxicology Center, University of Wisconsin-Madison, Madison, Wisconsin, USA
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9
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Taylor R, Long J, Yoon JW, Childs R, Sylvestersen KB, Nielsen ML, Leong KF, Iannaccone S, Walterhouse DO, Robbins DJ, Iannaccone P. Regulation of GLI1 by cis DNA elements and epigenetic marks. DNA Repair (Amst) 2019; 79:10-21. [PMID: 31085420 PMCID: PMC6570425 DOI: 10.1016/j.dnarep.2019.04.011] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2018] [Revised: 04/25/2019] [Accepted: 04/29/2019] [Indexed: 12/16/2022]
Abstract
GLI1 is one of three transcription factors (GLI1, GLI2 and GLI3) that mediate the Hedgehog signal transduction pathway and play important roles in normal development. GLI1 and GLI2 form a positive-feedback loop and function as human oncogenes. The mouse and human GLI1 genes have untranslated 5′ exons and large introns 5′ of the translational start. Here we show that Sonic Hedgehog (SHH) stimulates occupancy in the introns by H3K27ac, H3K4me3 and the histone reader protein BRD4. H3K27ac and H3K4me3 occupancy is not significantly changed by removing BRD4 from the human intron and transcription start site (TSS) region. We identified six GLI binding sites (GBS) in the first intron of the human GLI1 gene that are in regions of high sequence conservation among mammals. GLI1 and GLI2 bind all of the GBS in vitro. Elimination of GBS1 and 4 attenuates transcriptional activation by GLI1. Elimination of GBS1, 2, and 4 attenuates transcriptional activation by GLI2. Eliminating all sites essentially eliminates reporter gene activation. Further, GLI1 binds the histone variant H2A.Z. These results suggest that GLI1 and GLI2 can regulate GLI1 expression through protein-protein interactions involving complexes of transcription factors, histone variants, and reader proteins in the regulatory intron of the GLI1 gene. GLI1 acting in trans on the GLI1 intron provides a mechanism for GLI1 positive feedback and auto-regulation. Understanding the combinatorial protein landscape in this locus will be important to interrupting the GLI positive feedback loop and providing new therapeutic approaches to cancers associated with GLI1 overexpression.
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Affiliation(s)
- Robert Taylor
- Developmental Biology Program, Stanley Manne Children's Research Institute, Department of Pediatrics, Ann & Robert H. Lurie Children's Hospital, Northwestern University Feinberg School of Medicine, USA
| | - Jun Long
- The DeWitt Daughtry Family Department of Surgery, Miller School of Medicine, University of Miami, USA
| | - Joon Won Yoon
- Developmental Biology Program, Stanley Manne Children's Research Institute, Department of Pediatrics, Ann & Robert H. Lurie Children's Hospital, Northwestern University Feinberg School of Medicine, USA
| | - Ronnie Childs
- Developmental Biology Program, Stanley Manne Children's Research Institute, Department of Pediatrics, Ann & Robert H. Lurie Children's Hospital, Northwestern University Feinberg School of Medicine, USA
| | | | | | - King-Fu Leong
- Developmental Biology Program, Stanley Manne Children's Research Institute, Department of Pediatrics, Ann & Robert H. Lurie Children's Hospital, Northwestern University Feinberg School of Medicine, USA
| | - Stephen Iannaccone
- Developmental Biology Program, Stanley Manne Children's Research Institute, Department of Pediatrics, Ann & Robert H. Lurie Children's Hospital, Northwestern University Feinberg School of Medicine, USA
| | - David O Walterhouse
- Developmental Biology Program, Stanley Manne Children's Research Institute, Department of Pediatrics, Ann & Robert H. Lurie Children's Hospital, Northwestern University Feinberg School of Medicine, USA
| | - David J Robbins
- The DeWitt Daughtry Family Department of Surgery, Miller School of Medicine, University of Miami, USA.
| | - Philip Iannaccone
- Developmental Biology Program, Stanley Manne Children's Research Institute, Department of Pediatrics, Ann & Robert H. Lurie Children's Hospital, Northwestern University Feinberg School of Medicine, USA.
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10
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Singh R, Holz PS, Roth K, Hupfer A, Meissner W, Müller R, Buchholz M, Gress TM, Elsässer HP, Jacob R, Lauth M. DYRK1B regulates Hedgehog-induced microtubule acetylation. Cell Mol Life Sci 2019; 76:193-207. [PMID: 30317528 PMCID: PMC11105311 DOI: 10.1007/s00018-018-2942-5] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2018] [Revised: 09/25/2018] [Accepted: 10/08/2018] [Indexed: 01/12/2023]
Abstract
The posttranslational modification (PTM) of tubulin subunits is important for the physiological functions of the microtubule (MT) cytoskeleton. Although major advances have been made in the identification of enzymes carrying out MT-PTMs, little knowledge is available on how intercellular signaling molecules and their associated pathways regulate MT-PTM-dependent processes inside signal-receiving cells. Here we show that Hedgehog (Hh) signaling, a paradigmatic intercellular signaling system, affects the MT acetylation state in mammalian cells. Mechanistically, Hh pathway activity increases the levels of the MT-associated DYRK1B kinase, resulting in the inhibition of GSK3β through phosphorylation of Serine 9 and the subsequent suppression of HDAC6 enzyme activity. Since HDAC6 represents a major tubulin deacetylase, its inhibition increases the levels of acetylated MTs. Through the activation of DYRK1B, Hh signaling facilitates MT-dependent processes such as intracellular mitochondrial transport, mesenchymal cell polarization or directed cell migration. Taken together, we provide evidence that intercellular communication through Hh signals can regulate the MT cytoskeleton and contribute to MT-dependent processes by affecting the level of tubulin acetylation.
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Affiliation(s)
- Rajeev Singh
- Institute of Molecular Biology and Tumor Research (IMT), Center for Tumor- and Immune Biology (ZTI), Philipps University, Hans-Meerwein-Str. 3, 35043, Marburg, Germany
| | - Philipp Simon Holz
- Institute of Molecular Biology and Tumor Research (IMT), Center for Tumor- and Immune Biology (ZTI), Philipps University, Hans-Meerwein-Str. 3, 35043, Marburg, Germany
| | - Katrin Roth
- Imaging Core Facility, Center for Tumor- and Immune Biology (ZTI), Philipps University, Hans-Meerwein-Str. 3, 35043, Marburg, Germany
| | - Anna Hupfer
- Institute of Molecular Biology and Tumor Research (IMT), Center for Tumor- and Immune Biology (ZTI), Philipps University, Hans-Meerwein-Str. 3, 35043, Marburg, Germany
| | - Wolfgang Meissner
- Institute of Molecular Biology and Tumor Research (IMT), Center for Tumor- and Immune Biology (ZTI), Philipps University, Hans-Meerwein-Str. 3, 35043, Marburg, Germany
| | - Rolf Müller
- Institute of Molecular Biology and Tumor Research (IMT), Center for Tumor- and Immune Biology (ZTI), Philipps University, Hans-Meerwein-Str. 3, 35043, Marburg, Germany
| | - Malte Buchholz
- Clinic for Gastroenterology, Endocrinology, Metabolism and Infectiology, Philipps University, Marburg, Germany
| | - Thomas M Gress
- Clinic for Gastroenterology, Endocrinology, Metabolism and Infectiology, Philipps University, Marburg, Germany
| | - Hans-Peter Elsässer
- Institute of Cytobiology and Cytopathology, Philipps University, Robert Koch Str. 6, 35037, Marburg, Germany
| | - Ralf Jacob
- Institute of Cytobiology and Cytopathology, Philipps University, Robert Koch Str. 6, 35037, Marburg, Germany
| | - Matthias Lauth
- Institute of Molecular Biology and Tumor Research (IMT), Center for Tumor- and Immune Biology (ZTI), Philipps University, Hans-Meerwein-Str. 3, 35043, Marburg, Germany.
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11
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Rodriguez-Blanco J, Li B, Long J, Shen C, Yang F, Orton D, Collins S, Kasahara N, Ayad NG, McCrea HJ, Roussel MF, Weiss WA, Capobianco AJ, Robbins DJ. A CK1α Activator Penetrates the Brain and Shows Efficacy Against Drug-resistant Metastatic Medulloblastoma. Clin Cancer Res 2018; 25:1379-1388. [PMID: 30487124 DOI: 10.1158/1078-0432.ccr-18-1319] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2018] [Revised: 09/28/2018] [Accepted: 11/16/2018] [Indexed: 12/13/2022]
Abstract
PURPOSE Although most children with medulloblastoma are cured of their disease, Sonic Hedgehog (SHH) subgroup medulloblastoma driven by TRP53 mutations is essentially lethal. Casein kinase 1α (CK1α) phosphorylates and destabilizes GLI transcription factors, thereby inhibiting the key effectors of SHH signaling. We therefore tested a second-generation CK1α activator against TRP53-mutant, MYCN-amplified medulloblastoma. EXPERIMENTAL DESIGN The ability of this CK1α activator to block SHH signaling was determined in vitro using GLI reporter cells, granular precursor primary cultures, and PATCHED1 (PTCH1)-mutant sphere cultures. While in vivo efficacy was tested using 2 different medulloblastoma mouse models: PTCH1 and ND2:SMOA1. Finally, the clinical relevance of CK1α activators was demonstrated using a TRP53-mutant, MYCN-amplified patient-derived xenograft. RESULTS SSTC3 inhibited SHH activity in vitro, acting downstream of the vismodegib target SMOOTHENED (SMO), and reduced the viability of sphere cultures derived from SHH medulloblastoma. SSTC3 accumulated in the brain, inhibited growth of SHH medulloblastoma tumors, and blocked metastases in a genetically engineered vismodegib-resistant mouse model of SHH medulloblastoma. Importantly, SSTC3 attenuated growth and metastasis of orthotopic patient-derived TRP53-mutant, MYCN-amplified, SHH subgroup medulloblastoma xenografts, increasing overall survival. CONCLUSIONS Using a newly described small-molecule, SSTC3, we show that CK1a activators could address a significant unmet clinical need for patients with SMO inhibitor-resistant medulloblastoma, including those harboring mutations in TRP53.
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Affiliation(s)
- Jezabel Rodriguez-Blanco
- Molecular Oncology Program, The DeWitt Daughtry Family Department of Surgery, University of Miami, Miller School of Medicine, Miami, Florida
| | - Bin Li
- Molecular Oncology Program, The DeWitt Daughtry Family Department of Surgery, University of Miami, Miller School of Medicine, Miami, Florida
| | - Jun Long
- Molecular Oncology Program, The DeWitt Daughtry Family Department of Surgery, University of Miami, Miller School of Medicine, Miami, Florida
| | - Chen Shen
- Molecular Oncology Program, The DeWitt Daughtry Family Department of Surgery, University of Miami, Miller School of Medicine, Miami, Florida
| | - Fan Yang
- Molecular Oncology Program, The DeWitt Daughtry Family Department of Surgery, University of Miami, Miller School of Medicine, Miami, Florida
| | | | - Sara Collins
- Department of Cell Biology, University of Miami, Miller School of Medicine, Miami, Florida
| | - Noriyuki Kasahara
- Department of Cell Biology, University of Miami, Miller School of Medicine, Miami, Florida.,Sylvester Comprehensive Cancer Center, University of Miami, Florida
| | - Nagi G Ayad
- Sylvester Comprehensive Cancer Center, University of Miami, Florida.,Center for Therapeutic Innovation, Department of Psychiatry and Behavioral Sciences, University of Miami, Miller School of Medicine, Miami, Florida
| | - Heather J McCrea
- Department of Clinical Neurological Surgery, University of Miami, Florida
| | - Martine F Roussel
- Department of Tumor Cell Biology, St Jude Children's Research Hospital (SJCRH), Memphis, Tennessee
| | - William A Weiss
- Department of Neurology, University of California, San Francisco, California
| | - Anthony J Capobianco
- Molecular Oncology Program, The DeWitt Daughtry Family Department of Surgery, University of Miami, Miller School of Medicine, Miami, Florida.,Sylvester Comprehensive Cancer Center, University of Miami, Florida
| | - David J Robbins
- Molecular Oncology Program, The DeWitt Daughtry Family Department of Surgery, University of Miami, Miller School of Medicine, Miami, Florida. .,Sylvester Comprehensive Cancer Center, University of Miami, Florida
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12
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Casillas C, Roelink H. Gain-of-function Shh mutants activate Smo cell-autonomously independent of Ptch1/2 function. Mech Dev 2018; 153:30-41. [PMID: 30144507 PMCID: PMC6165682 DOI: 10.1016/j.mod.2018.08.009] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2018] [Revised: 08/20/2018] [Accepted: 08/21/2018] [Indexed: 12/25/2022]
Abstract
Sonic Hedgehog (Shh) signaling is characterized by non-cell autonomy; cells expressing Shh do not respond to the ligand. Here, we identify several Shh mutations that can activate the Hedgehog (Hh) pathway cell-autonomously. Cell-autonomous pathway activation requires the extracellular cysteine rich domain of Smoothened, but is otherwise independent of the Shh receptors Patched1 and -2. Many of the Shh mutants that gain activity fail to undergo auto processing resulting in the perdurance of the Shh pro-peptide, a form of Shh that is sufficient to activate the Hh response cell-autonomously. Our results demonstrate that Shh is capable of activating the Hh pathway via Smoothened, independently of Patched1/2, and that it harbors an intrinsic mechanism that prevents cell-autonomous activation of the Shh response.
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Affiliation(s)
- Catalina Casillas
- Department of Molecular and Cell Biology, 16 Barker Hall, 3204, University of California, Berkeley, CA 94720, USA
| | - Henk Roelink
- Department of Molecular and Cell Biology, 16 Barker Hall, 3204, University of California, Berkeley, CA 94720, USA.
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13
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Drummond ML, Li M, Tarapore E, Nguyen TTL, Barouni BJ, Cruz S, Tan KC, Oro AE, Atwood SX. Actin polymerization controls cilia-mediated signaling. J Cell Biol 2018; 217:3255-3266. [PMID: 29945904 PMCID: PMC6122990 DOI: 10.1083/jcb.201703196] [Citation(s) in RCA: 49] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2017] [Revised: 03/29/2018] [Accepted: 05/31/2018] [Indexed: 01/20/2023] Open
Abstract
Actin polymerization is important to generate primary cilia. Drummond et al. show that upstream actin regulators are necessary for this process by controlling aPKC and Src kinase activity to promote Hedgehog signaling and restrict primary cilia. Primary cilia are polarized organelles that allow detection of extracellular signals such as Hedgehog (Hh). How the cytoskeleton supporting the cilium generates and maintains a structure that finely tunes cellular response remains unclear. Here, we find that regulation of actin polymerization controls primary cilia and Hh signaling. Disrupting actin polymerization, or knockdown of N-WASp/Arp3, increases ciliation frequency, axoneme length, and Hh signaling. Cdc42, a potent actin regulator, recruits both atypical protein pinase C iota/lambda (aPKC) and Missing-in-Metastasis (MIM) to the basal body to maintain actin polymerization and restrict axoneme length. Transcriptome analysis implicates the Src pathway as a major aPKC effector. aPKC promotes whereas MIM antagonizes Src activity to maintain proper levels of primary cilia, actin polymerization, and Hh signaling. Hh pathway activation requires Smoothened-, Gli-, and Gli1-specific activation by aPKC. Surprisingly, longer axonemes can amplify Hh signaling, except when aPKC is disrupted, reinforcing the importance of the Cdc42–aPKC–Gli axis in actin-dependent regulation of primary cilia signaling.
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Affiliation(s)
- Michael L Drummond
- Department of Developmental and Cell Biology, University of California, Irvine, Irvine, CA
| | - Mischa Li
- Department of Dermatology, Program in Epithelial Biology, Stanford University School of Medicine, Stanford, CA
| | - Eric Tarapore
- Department of Developmental and Cell Biology, University of California, Irvine, Irvine, CA
| | - Tuyen T L Nguyen
- Department of Developmental and Cell Biology, University of California, Irvine, Irvine, CA
| | - Baina J Barouni
- Department of Developmental and Cell Biology, University of California, Irvine, Irvine, CA
| | - Shaun Cruz
- Department of Developmental and Cell Biology, University of California, Irvine, Irvine, CA
| | - Kevin C Tan
- Department of Developmental and Cell Biology, University of California, Irvine, Irvine, CA
| | - Anthony E Oro
- Department of Dermatology, Program in Epithelial Biology, Stanford University School of Medicine, Stanford, CA
| | - Scott X Atwood
- Department of Developmental and Cell Biology, University of California, Irvine, Irvine, CA .,Department of Dermatology, University of California, Irvine, Irvine, CA.,Chao Family Comprehensive Cancer Center, University of California, Irvine, Irvine, CA
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14
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Goruppi S, Procopio MG, Jo S, Clocchiatti A, Neel V, Dotto GP. The ULK3 Kinase Is Critical for Convergent Control of Cancer-Associated Fibroblast Activation by CSL and GLI. Cell Rep 2018; 20:2468-2479. [PMID: 28877478 DOI: 10.1016/j.celrep.2017.08.048] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2016] [Revised: 06/15/2017] [Accepted: 08/15/2017] [Indexed: 12/11/2022] Open
Abstract
The connection between signaling pathways activating cancer-associated fibroblasts (CAFs) remains to be determined. Metabolic alterations linked to autophagy have also been implicated in CAF activation. CSL/RBPJ, a transcriptional repressor that mediates Notch signaling, suppresses the gene expression program(s), leading to stromal senescence and CAF activation. Deregulated GLI signaling can also contribute to CAF conversion. Here, we report that compromised CSL function depends on GLI activation for conversion of human dermal fibroblasts into CAFs, separately from cellular senescence. Decreased CSL upregulates the expression of the ULK3 kinase, which binds and activates GLI2. Increased ULK3 also induces autophagy, which is unlinked from GLI and CAF activation. ULK3 upregulation occurs in the CAFs of several tumor types, and ULK3 silencing suppresses the tumor-enhancing properties of these cells. Thus, ULK3 links two key signaling pathways involved in CAF conversion and is an attractive target for stroma-focused anti-cancer intervention.
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Affiliation(s)
- Sandro Goruppi
- Cutaneous Biology Research Center, Massachusetts General Hospital, 149 Bldg., 13th St. Charlestown, MA 02129, USA; Department of Dermatology, Harvard Medical School, Boston, MA 02125, USA
| | - Maria-Giuseppina Procopio
- Department of Biochemistry, University of Lausanne, 155 Chemin des Boveresses, Epalinges 1066, Switzerland
| | - Seunghee Jo
- Cutaneous Biology Research Center, Massachusetts General Hospital, 149 Bldg., 13th St. Charlestown, MA 02129, USA; Department of Dermatology, Harvard Medical School, Boston, MA 02125, USA
| | - Andrea Clocchiatti
- Cutaneous Biology Research Center, Massachusetts General Hospital, 149 Bldg., 13th St. Charlestown, MA 02129, USA; Department of Dermatology, Harvard Medical School, Boston, MA 02125, USA
| | - Victor Neel
- Department of Dermatology, Massachusetts General Hospital, Boston, MA 02114, USA
| | - G Paolo Dotto
- Cutaneous Biology Research Center, Massachusetts General Hospital, 149 Bldg., 13th St. Charlestown, MA 02129, USA; Department of Biochemistry, University of Lausanne, 155 Chemin des Boveresses, Epalinges 1066, Switzerland.
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15
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Liu X, Wang Y, Liu F, Zhang M, Song H, Zhou B, Lo CW, Tong S, Hu Z, Zhang Z. Wdpcp promotes epicardial EMT and epicardium-derived cell migration to facilitate coronary artery remodeling. Sci Signal 2018; 11:11/519/eaah5770. [PMID: 29487191 DOI: 10.1126/scisignal.aah5770] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
Abstract
During coronary vasculature development, endothelial cells enclose the embryonic heart to form the primitive coronary plexus. This structure is remodeled upon recruitment of epicardial cells that may undergo epithelial-mesenchymal transition (EMT) to enable migration and that give rise to smooth muscle cells. In mice expressing a loss-of-function mutant form of Wdpcp, a gene involved in ciliogenesis, the enclosure of the surface of the heart by the subepicardial coronary plexus was accelerated because of enhanced chemotactic responses to Shh. Coronary arteries, but not coronary veins in Wdpcp mutant mice, showed reduced smooth muscle cell coverage. In addition, Wdpcp mutant hearts had reduced expression of EMT and mesenchymal markers and had fewer epicardium-derived cells (EPDCs) that showed impaired migration. Epicardium-specific deletion of Wdpcp recapitulated the coronary artery defect of the Wdpcp mutant. Thus, Wdpcp promotes epithelial EMT and EPDC migration, processes that are required for remodeling of the coronary primitive plexus. The Wdpcp mutant mice will be a useful tool to dissect the molecular mechanisms that govern the remodeling of the primitive plexus during coronary development.
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Affiliation(s)
- Xiangyang Liu
- Shanghai Pediatric Congenital Heart Disease Institute and Pediatric Translational Medicine Institute, Shanghai Children's Medical Center, Shanghai Jiao Tong University School of Medicine, Shanghai 200127, China
| | - Ye Wang
- Shanghai Pediatric Congenital Heart Disease Institute and Pediatric Translational Medicine Institute, Shanghai Children's Medical Center, Shanghai Jiao Tong University School of Medicine, Shanghai 200127, China
| | - Feng Liu
- Shanghai Pediatric Congenital Heart Disease Institute and Pediatric Translational Medicine Institute, Shanghai Children's Medical Center, Shanghai Jiao Tong University School of Medicine, Shanghai 200127, China
| | - Min Zhang
- Shanghai Pediatric Congenital Heart Disease Institute and Pediatric Translational Medicine Institute, Shanghai Children's Medical Center, Shanghai Jiao Tong University School of Medicine, Shanghai 200127, China
| | - Hejie Song
- Shanghai Pediatric Congenital Heart Disease Institute and Pediatric Translational Medicine Institute, Shanghai Children's Medical Center, Shanghai Jiao Tong University School of Medicine, Shanghai 200127, China
| | - Bin Zhou
- Key Laboratory of Nutrition and Metabolism, Institute for Nutritional Sciences, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, Shanghai 200031, China
| | - Cecilia W Lo
- Department of Developmental Biology, University of Pittsburgh, Pittsburgh, PA 15201, USA
| | - Shilu Tong
- Department of Clinical Epidemiology and Biostatistics, Shanghai Children's Medical Center, Shanghai Jiao Tong University School of Medicine, Shanghai 200127, China
| | - Zhenlei Hu
- Department of Cardiovascular Surgery, Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200011, China.
| | - Zhen Zhang
- Shanghai Pediatric Congenital Heart Disease Institute and Pediatric Translational Medicine Institute, Shanghai Children's Medical Center, Shanghai Jiao Tong University School of Medicine, Shanghai 200127, China.
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16
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Motile cilia of human airway epithelia contain hedgehog signaling components that mediate noncanonical hedgehog signaling. Proc Natl Acad Sci U S A 2018; 115:1370-1375. [PMID: 29358407 PMCID: PMC5819449 DOI: 10.1073/pnas.1719177115] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022] Open
Abstract
Previous studies localized the hedgehog (HH) signaling system to primary cilia. We discovered that motile cilia on airway epithelia also contain HH signaling proteins, indicating that like primary cilia, these motile cilia have an important sensory function. However, in contrast to the function of HH signaling in most primary cilia, sonic hedgehog (SHH) elicits noncanonical signaling, reducing cellular levels of cAMP. These findings suggest that airway SHH may quiet airway defenses. Involvement of SHH in lung disease and positioning of motile cilia where they sample SHH and other ligands in the airway lumen suggest that noncanonical HH signaling might modulate airway responses to the environment in health and disease. Differentiated airway epithelia produce sonic hedgehog (SHH), which is found in the thin layer of liquid covering the airway surface. Although previous studies showed that vertebrate HH signaling requires primary cilia, as airway epithelia mature, the cells lose primary cilia and produce hundreds of motile cilia. Thus, whether airway epithelia have apical receptors for SHH has remained unknown. We discovered that motile cilia on airway epithelial cells have HH signaling proteins, including patched and smoothened. These cilia also have proteins affecting cAMP-dependent signaling, including Gαi and adenylyl cyclase 5/6. Apical SHH decreases intracellular levels of cAMP, which reduces ciliary beat frequency and pH in airway surface liquid. These results suggest that apical SHH may mediate noncanonical HH signaling through motile cilia to dampen respiratory defenses at the contact point between the environment and the lung, perhaps counterbalancing processes that stimulate airway defenses.
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17
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Fink DM, Sun MR, Heyne GW, Everson JL, Chung HM, Park S, Sheets MD, Lipinski RJ. Coordinated d-cyclin/Foxd1 activation drives mitogenic activity of the Sonic Hedgehog signaling pathway. Cell Signal 2017; 44:1-9. [PMID: 29284139 DOI: 10.1016/j.cellsig.2017.12.007] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2017] [Revised: 11/30/2017] [Accepted: 12/22/2017] [Indexed: 12/22/2022]
Abstract
Sonic Hedgehog (Shh) signaling plays key regulatory roles in embryonic development and postnatal homeostasis and repair. Modulation of the Shh pathway is known to cause malformations and malignancies associated with dysregulated tissue growth. However, our understanding of the molecular mechanisms by which Shh regulates cellular proliferation is incomplete. Here, using mouse embryonic fibroblasts, we demonstrate that the Forkhead box gene Foxd1 is transcriptionally regulated by canonical Shh signaling and required for downstream proliferative activity. We show that Foxd1 deletion abrogates the proliferative response to SHH ligand while FOXD1 overexpression alone is sufficient to induce cellular proliferation. The proliferative response to both SHH ligand and FOXD1 overexpression was blocked by pharmacologic inhibition of cyclin-dependent kinase signaling. Time-course experiments revealed that Shh pathway activation of Foxd1 is followed by downregulation of Cdkn1c, which encodes a cyclin-dependent kinase inhibitor. Consistent with a direct transcriptional regulation mechanism, we found that FOXD1 reduces reporter activity of a Fox enhancer sequence in the second intron of Cdkn1c. Supporting the applicability of these findings to specific biological contexts, we show that Shh regulation of Foxd1 and Cdkn1c is recapitulated in cranial neural crest cells and provide evidence that this mechanism is operational during upper lip morphogenesis. These results reveal a novel Shh-Foxd1-Cdkn1c regulatory circuit that drives the mitogenic action of Shh signaling and may have broad implications in development and disease.
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Affiliation(s)
- Dustin M Fink
- Department of Comparative Biosciences, School of Veterinary Medicine, University of Wisconsin-Madison, Madison, WI, United States
| | - Miranda R Sun
- Department of Comparative Biosciences, School of Veterinary Medicine, University of Wisconsin-Madison, Madison, WI, United States
| | - Galen W Heyne
- Department of Comparative Biosciences, School of Veterinary Medicine, University of Wisconsin-Madison, Madison, WI, United States
| | - Joshua L Everson
- Department of Comparative Biosciences, School of Veterinary Medicine, University of Wisconsin-Madison, Madison, WI, United States; Molecular and Environmental Toxicology Center, School of Medicine and Public Health, University of Wisconsin-Madison, Madison, WI, United States
| | - Hannah M Chung
- Department of Comparative Biosciences, School of Veterinary Medicine, University of Wisconsin-Madison, Madison, WI, United States; Molecular and Environmental Toxicology Center, School of Medicine and Public Health, University of Wisconsin-Madison, Madison, WI, United States
| | - Sookhee Park
- Department of Biomolecular Chemistry, School of Medicine and Public Health, University of Wisconsin-Madison, Madison, WI, United States
| | - Michael D Sheets
- Department of Biomolecular Chemistry, School of Medicine and Public Health, University of Wisconsin-Madison, Madison, WI, United States
| | - Robert J Lipinski
- Department of Comparative Biosciences, School of Veterinary Medicine, University of Wisconsin-Madison, Madison, WI, United States; Molecular and Environmental Toxicology Center, School of Medicine and Public Health, University of Wisconsin-Madison, Madison, WI, United States.
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18
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Neumann JE, Wefers AK, Lambo S, Bianchi E, Bockstaller M, Dorostkar MM, Meister V, Schindler P, Korshunov A, von Hoff K, Nowak J, Warmuth-Metz M, Schneider MR, Renner-Müller I, Merk DJ, Shakarami M, Sharma T, Chavez L, Glass R, Chan JA, Taketo MM, Neumann P, Kool M, Schüller U. A mouse model for embryonal tumors with multilayered rosettes uncovers the therapeutic potential of Sonic-hedgehog inhibitors. Nat Med 2017; 23:1191-1202. [DOI: 10.1038/nm.4402] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2016] [Accepted: 08/15/2017] [Indexed: 12/24/2022]
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19
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Katic J, Loers G, Tosic J, Schachner M, Kleene R. The cell adhesion molecule CHL1 interacts with patched-1 to regulate apoptosis during postnatal cerebellar development. J Cell Sci 2017. [PMID: 28630165 DOI: 10.1242/jcs.194563] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023] Open
Abstract
The immunoglobulin superfamily adhesion molecule close homolog of L1 (CHL1) plays important roles during nervous system development. Here, we identified the hedgehog receptor patched-1 (PTCH1) as a novel CHL1-binding protein and showed that CHL1 interacts with the first extracellular loop of PTCH1 via its extracellular domain. Colocalization and co-immunoprecipitation of CHL1 with PTCH1 suggest an association of CHL1 with this major component of the hedgehog signaling pathway. The trans-interaction of CHL1 with PTCH1 promotes neuronal survival in cultures of dissociated cerebellar granule cells and of organotypic cerebellar slices. An inhibitor of the PTCH1-regulated hedgehog signal transducer, smoothened (SMO), and inhibitors of RhoA and Rho-associated kinase (ROCK) 1 and 2 prevent CHL1-dependent survival of cultured cerebellar granule cells and survival of cerebellar granule and Purkinje cells in organotypic cultures. In histological sections from 10- and 14-day-old CHL1-deficient mice, enhanced apoptosis of granule, but not Purkinje, cells was observed. The results of the present study indicate that CHL1 triggers PTCH1-, SMO-, RhoA- and ROCK-dependent signal transduction pathways to promote neuronal survival after cessation of the major morphogenetic events during mouse cerebellar development.
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Affiliation(s)
- Jelena Katic
- Zentrum für Molekulare Neurobiologie, Universitätsklinikum Hamburg-Eppendorf, Martinistr. 52, 20246 Hamburg, Germany
| | - Gabriele Loers
- Zentrum für Molekulare Neurobiologie, Universitätsklinikum Hamburg-Eppendorf, Martinistr. 52, 20246 Hamburg, Germany
| | - Jelena Tosic
- Zentrum für Molekulare Neurobiologie, Universitätsklinikum Hamburg-Eppendorf, Martinistr. 52, 20246 Hamburg, Germany
| | - Melitta Schachner
- Keck Center for Collaborative Neuroscience, Rutgers University, 604 Allison Road, Piscataway, NJ 08854, USA .,Department of Cell Biology and Neuroscience, Rutgers University, 604 Allison Road, Piscataway, NJ 08854, USA.,Center for Neuroscience, Shantou University Medical College, 22 Xin Ling Road, Shantou, Guangdong 515041, China
| | - Ralf Kleene
- Zentrum für Molekulare Neurobiologie, Universitätsklinikum Hamburg-Eppendorf, Martinistr. 52, 20246 Hamburg, Germany
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20
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Everson JL, Fink DM, Yoon JW, Leslie EJ, Kietzman HW, Ansen-Wilson LJ, Chung HM, Walterhouse DO, Marazita ML, Lipinski RJ. Sonic hedgehog regulation of Foxf2 promotes cranial neural crest mesenchyme proliferation and is disrupted in cleft lip morphogenesis. Development 2017; 144:2082-2091. [PMID: 28506991 DOI: 10.1242/dev.149930] [Citation(s) in RCA: 45] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2017] [Accepted: 04/24/2017] [Indexed: 01/18/2023]
Abstract
Cleft lip is one of the most common human birth defects, yet our understanding of the mechanisms that regulate lip morphogenesis is limited. Here, we show in mice that sonic hedgehog (Shh)-induced proliferation of cranial neural crest cell (cNCC) mesenchyme is required for upper lip closure. Gene expression profiling revealed a subset of Forkhead box (Fox) genes that are regulated by Shh signaling during lip morphogenesis. During cleft pathogenesis, reduced proliferation in the medial nasal process mesenchyme paralleled the domain of reduced Foxf2 and Gli1 expression. SHH ligand induction of Foxf2 expression was dependent upon Shh pathway effectors in cNCCs, while a functional GLI-binding site was identified downstream of Foxf2 Consistent with the cellular mechanism demonstrated for cleft lip pathogenesis, we found that either SHH ligand addition or FOXF2 overexpression is sufficient to induce cNCC proliferation. Finally, analysis of a large multi-ethnic human population with cleft lip identified clusters of single-nucleotide polymorphisms in FOXF2 These data suggest that direct targeting of Foxf2 by Shh signaling drives cNCC mesenchyme proliferation during upper lip morphogenesis, and that disruption of this sequence results in cleft lip.
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Affiliation(s)
- Joshua L Everson
- Department of Comparative Biosciences, School of Veterinary Medicine, University of Wisconsin-Madison, Madison, WI 53706, USA.,Molecular and Environmental Toxicology Center, University of Wisconsin-Madison, Madison, WI 53706, USA
| | - Dustin M Fink
- Department of Comparative Biosciences, School of Veterinary Medicine, University of Wisconsin-Madison, Madison, WI 53706, USA
| | - Joon Won Yoon
- Northwestern University Feinberg School of Medicine and the Developmental Biology and Cancer Biology Programs of the Stanley Manne Children's Research Institute, Chicago, IL 60611, USA
| | - Elizabeth J Leslie
- School of Dental Medicine, Department of Oral Biology, Center for Craniofacial and Dental Genetics, University of Pittsburgh, Pittsburgh, PA 15261, USA
| | - Henry W Kietzman
- Department of Comparative Biosciences, School of Veterinary Medicine, University of Wisconsin-Madison, Madison, WI 53706, USA
| | - Lydia J Ansen-Wilson
- Department of Comparative Biosciences, School of Veterinary Medicine, University of Wisconsin-Madison, Madison, WI 53706, USA
| | - Hannah M Chung
- Department of Comparative Biosciences, School of Veterinary Medicine, University of Wisconsin-Madison, Madison, WI 53706, USA.,Molecular and Environmental Toxicology Center, University of Wisconsin-Madison, Madison, WI 53706, USA
| | - David O Walterhouse
- Northwestern University Feinberg School of Medicine and the Developmental Biology and Cancer Biology Programs of the Stanley Manne Children's Research Institute, Chicago, IL 60611, USA
| | - Mary L Marazita
- School of Dental Medicine, Department of Oral Biology, Center for Craniofacial and Dental Genetics, University of Pittsburgh, Pittsburgh, PA 15261, USA
| | - Robert J Lipinski
- Department of Comparative Biosciences, School of Veterinary Medicine, University of Wisconsin-Madison, Madison, WI 53706, USA .,Molecular and Environmental Toxicology Center, University of Wisconsin-Madison, Madison, WI 53706, USA
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21
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Zhang Z, Shen L, Law K, Zhang Z, Liu X, Hua H, Li S, Huang H, Yue S, Hui CC, Cheng SY. Suppressor of Fused Chaperones Gli Proteins To Generate Transcriptional Responses to Sonic Hedgehog Signaling. Mol Cell Biol 2017; 37:e00421-16. [PMID: 27849569 PMCID: PMC5247608 DOI: 10.1128/mcb.00421-16] [Citation(s) in RCA: 47] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2016] [Revised: 08/19/2016] [Accepted: 11/04/2016] [Indexed: 11/20/2022] Open
Abstract
Cellular responses to the graded Sonic Hedgehog (Shh) morphogenic signal are orchestrated by three Gli genes that give rise to both transcription activators and repressors. An essential downstream regulator of the pathway, encoded by the tumor suppressor gene Suppressor of fused (Sufu), plays critical roles in the production, trafficking, and function of Gli proteins, but the mechanism remains controversial. Here, we show that Sufu is upregulated in active Shh responding tissues and accompanies Gli activators translocating into and Gli repressors out of the nucleus. Trafficking of Sufu to the primary cilium, potentiated by Gli activators but not repressors, was found to be coupled to its nuclear import. We have identified a nuclear export signal (NES) motif of Sufu in juxtaposition to the protein kinase A (PKA) and glycogen synthase kinase 3 (GSK3) dual phosphorylation sites and show that Sufu binds the chromatin with both Gli1 and Gli3. Close comparison of neural tube development among individual Ptch1-/-, Sufu-/-, and Ptch1-/-; Sufu-/- double mutant embryos indicates that Sufu is critical for the maximal activation of Shh signaling essential to the specification of the most-ventral neurons. These data define Sufu as a novel class of molecular chaperone required for every aspect of Gli regulation and function.
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Affiliation(s)
- Ziyu Zhang
- Department of Developmental Genetics, School of Basic Medical Sciences, Nanjing Medical University, Nanjing, Jiangsu, China
| | - Longyan Shen
- Department of Developmental Genetics, School of Basic Medical Sciences, Nanjing Medical University, Nanjing, Jiangsu, China
| | - Kelvin Law
- Department of Molecular Genetics, University of Toronto, Toronto, Canada
| | - Zengdi Zhang
- Department of Developmental Genetics, School of Basic Medical Sciences, Nanjing Medical University, Nanjing, Jiangsu, China
| | - Xiaotong Liu
- Department of Developmental Genetics, School of Basic Medical Sciences, Nanjing Medical University, Nanjing, Jiangsu, China
| | - Hu Hua
- Department of Developmental Genetics, School of Basic Medical Sciences, Nanjing Medical University, Nanjing, Jiangsu, China
| | - Sanen Li
- Department of Developmental Genetics, School of Basic Medical Sciences, Nanjing Medical University, Nanjing, Jiangsu, China
| | - Huijie Huang
- Department of Developmental Genetics, School of Basic Medical Sciences, Nanjing Medical University, Nanjing, Jiangsu, China
| | - Shen Yue
- Department of Developmental Genetics, School of Basic Medical Sciences, Nanjing Medical University, Nanjing, Jiangsu, China
| | - Chi-Chung Hui
- Department of Molecular Genetics, University of Toronto, Toronto, Canada
| | - Steven Y Cheng
- Department of Developmental Genetics, School of Basic Medical Sciences, Nanjing Medical University, Nanjing, Jiangsu, China
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22
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Didiasova M, Singh R, Wilhelm J, Kwapiszewska G, Wujak L, Zakrzewicz D, Schaefer L, Markart P, Seeger W, Lauth M, Wygrecka M. Pirfenidone exerts antifibrotic effects through inhibition of GLI transcription factors. FASEB J 2017; 31:1916-1928. [DOI: 10.1096/fj.201600892rr] [Citation(s) in RCA: 58] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2016] [Accepted: 01/09/2017] [Indexed: 01/22/2023]
Affiliation(s)
- Miroslava Didiasova
- Department of BiochemistryUniversities of Giessen and Marburg Lung CenterGiessenGermany
| | - Rajeev Singh
- Institute of Molecular Biology and Tumor Research (IMT)Center for Tumor Biology and ImmunologyPhilipps UniversityMarburgGermany
| | - Jochen Wilhelm
- Department of Internal MedicineUniversities of Giessen and Marburg Lung CenterGiessenGermany
- German Center for Lung ResearchJustus‐Liebig UniversityGiessenGermany
| | | | - Lukasz Wujak
- Department of BiochemistryUniversities of Giessen and Marburg Lung CenterGiessenGermany
| | - Dariusz Zakrzewicz
- Department of BiochemistryUniversities of Giessen and Marburg Lung CenterGiessenGermany
| | - Liliana Schaefer
- Institute of Pharmacology and ToxicologyGoethe University School of MedicineFrankfurt am MainGermany
| | - Philipp Markart
- Department of Internal MedicineUniversities of Giessen and Marburg Lung CenterGiessenGermany
- German Center for Lung ResearchJustus‐Liebig UniversityGiessenGermany
| | - Werner Seeger
- Department of Internal MedicineUniversities of Giessen and Marburg Lung CenterGiessenGermany
- German Center for Lung ResearchJustus‐Liebig UniversityGiessenGermany
| | - Matthias Lauth
- Institute of Molecular Biology and Tumor Research (IMT)Center for Tumor Biology and ImmunologyPhilipps UniversityMarburgGermany
| | - Malgorzata Wygrecka
- Department of BiochemistryUniversities of Giessen and Marburg Lung CenterGiessenGermany
- German Center for Lung ResearchJustus‐Liebig UniversityGiessenGermany
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23
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Singh R, Dhanyamraju PK, Lauth M. DYRK1B blocks canonical and promotes non-canonical Hedgehog signaling through activation of the mTOR/AKT pathway. Oncotarget 2017; 8:833-845. [PMID: 27903983 PMCID: PMC5352201 DOI: 10.18632/oncotarget.13662] [Citation(s) in RCA: 57] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2016] [Accepted: 11/16/2016] [Indexed: 12/20/2022] Open
Abstract
Hedgehog (Hh) signaling plays important roles in embryonic development and in tumor formation. Apart from the well-established stimulation of the GLI family of transcription factors, Hh ligands promote the phosphorylation and activation of mTOR and AKT kinases, yet the molecular mechanism underlying these processes are unknown. Here, we identify the DYRK1B kinase as a mediator between Hh signaling and mTOR/AKT activation. In fibroblasts, Hh signaling induces DYRK1B protein expression, resulting in activation of the mTOR/AKT kinase signaling arm. Furthermore, DYRK1B exerts positive and negative feedback regulation on the Hh pathway itself: It negatively interferes with SMO-elicited canonical Hh signaling, while at the same time it provides positive feed-forward functions by promoting AKT-mediated GLI stability. Due to the fact that the mTOR/AKT pathway is itself subject to strong negative feedback regulation, pharmacological inhibition of DYRK1B results in initial upregulation followed by downregulation of AKT phosphorylation and GLI stabilization. Addressing this issue therapeutically, we show that a pharmacological approach combining a DYRK1B antagonist with an mTOR/AKT inhibitor results in strong GLI1 targeting and in pronounced cytotoxicity in human pancreatic and ovarian cancer cells.
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Affiliation(s)
- Rajeev Singh
- Philipps University Marburg, Institute of Molecular Biology and Tumor Research (IMT), Center for Tumor- and Immunobiology, 35043 Marburg, Germany
| | - Pavan Kumar Dhanyamraju
- Philipps University Marburg, Institute of Molecular Biology and Tumor Research (IMT), Center for Tumor- and Immunobiology, 35043 Marburg, Germany
| | - Matthias Lauth
- Philipps University Marburg, Institute of Molecular Biology and Tumor Research (IMT), Center for Tumor- and Immunobiology, 35043 Marburg, Germany
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24
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Lee H, Ko HW. Ciliary smoothened-mediated noncanonical hedgehog signaling promotes tubulin acetylation. Biochem Biophys Res Commun 2016; 480:574-579. [PMID: 27793670 DOI: 10.1016/j.bbrc.2016.10.093] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2016] [Accepted: 10/24/2016] [Indexed: 12/12/2022]
Abstract
Hedgehog (Hh) signaling plays key roles in animal development and tissue homeostasis. Binding of the secreted ligand to its Ptch1 receptor triggers Hh signaling through distinct canonical or noncanonical signaling pathways. Canonical Hh signaling leads to the activation of Gli transcription factors to induce Hh target-gene expression. In contrast, noncanonical Hh signaling regulates cytoskeleton rearrangement and apoptosis. Recently, it has been shown that primary cilia are important for canonical Hh signaling, but the ciliary role for signaling through the noncanonical pathway remains unresolved. Here, we examine the role of primary cilia in noncanonical Hh signaling in cultured mammalian cells. We found that Hh pathway activation in mouse embryonic fibroblast cells (MEFs) increases microtubule acetylation via smoothened (Smo), and suppression of Hh signaling by a Smo antagonist abrogates the microtubule acetylation. Using genetically engineered MEFs, we revealed that the increase in microtubule acetylation by Hh is dependent on Smo, but not on Sufu or Gli. In Kif3a-/- MEFs, which cannot form primary cilia, we observed that primary cilia were required for transducing noncanonical Hh signaling. Furthermore, we revealed that an increase in intracellular calcium is important for Hh-dependent tubulin acetylation at the downstream of Smo. Collectively, these findings suggest that Smo and primary cilia-dependent noncanonical Hh signaling leads to post-translational regulation of microtubules and may be important for modulating cell behaviors.
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Affiliation(s)
- Hankyu Lee
- College of Pharmacy, Dongguk University-Seoul, 32 Donggukro, Ilsandonggu, Goyangsi, Gyeonggido, 10326, South Korea
| | - Hyuk Wan Ko
- College of Pharmacy, Dongguk University-Seoul, 32 Donggukro, Ilsandonggu, Goyangsi, Gyeonggido, 10326, South Korea.
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25
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Fu L, Wu H, Cheng SY, Gao D, Zhang L, Zhao Y. Set7 mediated Gli3 methylation plays a positive role in the activation of Sonic Hedgehog pathway in mammals. eLife 2016; 5. [PMID: 27146893 PMCID: PMC4884081 DOI: 10.7554/elife.15690] [Citation(s) in RCA: 48] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2016] [Accepted: 05/03/2016] [Indexed: 12/14/2022] Open
Abstract
Hedgehog signaling plays very important roles in development and cancers. Vertebrates have three transcriptional factors, Gli1, Gli2 and Gli3. Among them, Gli3 is a very special transcriptional factor which closely resembles Cubitus interruptus (Ci, in Drosophila) structurally and functionally as a ‘double agent’ for Shh target gene expression. Here we show that Gli3 full-length, but not the truncated form, can be methylated at K436 and K595. This methylation is specifically catalyzed by Set7, a lysine methyltransferase (KMT). Methylation at K436 and K595 respectively increases the stability and DNA binding ability of Gli3, resulting in an enhancement of Shh signaling activation. Furthermore, functional experiments indicate that the Gli3 methylation contributes to the tumor growth and metastasis in non-small cell lung cancer in vitro and in vivo. Therefore, we propose that Set7 mediated methylation is a novel PTM of Gli3, which positively regulates the transactivity of Gli3 and the activation of Shh signaling. DOI:http://dx.doi.org/10.7554/eLife.15690.001 Cells in mammals need to be able to communicate with each other to enable them to work together in tissues and organs. A signaling pathway called Hedgehog signaling plays a crucial role in carrying information between cells in developing embryos, but if it is active at other times it can also promote the development of cancers. The Hedgehog signaling pathway regulates the activity of several proteins, including one called Gli3. When the Hedgehog signaling pathway is not active, Gli3 is able to switch off certain genes in the cells. On the other hand, when the signaling pathway is active, Gli3 changes shape so that it is able to activate its target genes instead. It is thought that this shape change is triggered by the addition (or removal) of chemical tags to Gli3. So far, researchers have reported that several different types of chemical tags can modify the activity of Gli3. However, it is not clear whether another type of chemical tag – known as a methyl tag – is involved in regulating Gli3. Fu et al. studied Hedgehog signaling in mice. The experiments show that an enzyme called Set7 can modify Gli3 by adding methyl tags to certain sites in the protein. This modification makes the protein’s structure more stable and helps it to bind to the target genes. Further experiments show that these methyl groups contribute to the progression of lung cancer. Fu et al.’s findings expand our understanding of how chemical tags can alter the cells’ response to Hedgehog signaling activity. Future challenges are to understand exactly how Set7 and Gli3 interact and to develop drugs that can block this interaction, which may have the potential to treat cancer. DOI:http://dx.doi.org/10.7554/eLife.15690.002
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Affiliation(s)
- Lin Fu
- State Key Laboratory of Cell Biology, CAS Center for Excellence in Molecular Cell Science, Innovation Center for Cell Signaling Network, Institute of Biochemistry and Cell Biology, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, University of Chinese Academy of Sciences, Shanghai, China
| | - Hailong Wu
- State Key Laboratory of Cell Biology, CAS Center for Excellence in Molecular Cell Science, Innovation Center for Cell Signaling Network, Institute of Biochemistry and Cell Biology, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, University of Chinese Academy of Sciences, Shanghai, China
| | - Steven Y Cheng
- Department of Developmental Genetics, School of Basic Medical Sciences, Nanjing Medical University, Nanjing, China
| | - Daming Gao
- State Key Laboratory of Cell Biology, CAS Center for Excellence in Molecular Cell Science, Innovation Center for Cell Signaling Network, Institute of Biochemistry and Cell Biology, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, University of Chinese Academy of Sciences, Shanghai, China
| | - Lei Zhang
- State Key Laboratory of Cell Biology, CAS Center for Excellence in Molecular Cell Science, Innovation Center for Cell Signaling Network, Institute of Biochemistry and Cell Biology, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, University of Chinese Academy of Sciences, Shanghai, China.,School of Life Science and Technology, ShanghaiTech University, Shanghai, China
| | - Yun Zhao
- State Key Laboratory of Cell Biology, CAS Center for Excellence in Molecular Cell Science, Innovation Center for Cell Signaling Network, Institute of Biochemistry and Cell Biology, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, University of Chinese Academy of Sciences, Shanghai, China.,School of Life Science and Technology, ShanghaiTech University, Shanghai, China
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26
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Li B, Giambelli C, Tang B, Winterbottom E, Long J, Jin K, Wang Z, Fei DL, Nguyen DM, Athar M, Wang B, Subbarayan PR, Wang L, Rai P, Ardalan B, Capobianco AJ, Robbins DJ. Arsenic Attenuates GLI Signaling, Increasing or Decreasing its Transcriptional Program in a Context-Dependent Manner. Mol Pharmacol 2016; 89:226-32. [PMID: 26573582 PMCID: PMC4727125 DOI: 10.1124/mol.115.100867] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2015] [Accepted: 11/13/2015] [Indexed: 01/04/2023] Open
Abstract
The metalloid arsenic is a worldwide environmental toxicant, exposure to which is associated with many adverse outcomes. Arsenic is also an effective therapeutic agent in certain disease settings. Arsenic was recently shown to regulate the activity of the Hedgehog (HH) signal transduction pathway, and this regulation of HH signaling was proposed to be responsible for a subset of arsenic's biologic effects. Surprisingly, these separate reports proposed contradictory activities for arsenic, as either an agonist or antagonist of HH signaling. Here we provide in vitro and in vivo evidence that arsenic acts as a modulator of the activity of the HH effector protein glioma-associated oncogene family zinc finger (GLI), activating or inhibiting GLI activity in a context-dependent manner. This arsenic-induced modulation of HH signaling is observed in cultured cells, patients with colorectal cancer who have received arsenic-based therapy, and a mouse colorectal cancer xenograft model. Our results show that arsenic activates GLI signaling when the intrinsic GLI activity is low but inhibits signaling in the presence of high-level GLI activity. Furthermore, we show that this modulation occurs downstream of primary cilia, evidenced by experiments in suppressor of fused homolog (SUFU) deficient cells. Combining our findings with previous reports, we present an inclusive model in which arsenic plays dual roles in GLI signaling modulation: when GLIs are primarily in their repressor form, arsenic antagonizes their repression capacity, leading to low-level GLI activation, but when GLIs are primarily in their activator form, arsenic attenuates their activity.
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Affiliation(s)
- Bin Li
- Molecular Oncology Program, Department of Surgery, Miller School of Medicine, University of Miami, Miami, Florida (B.L., C.G., E.W., J.L., K.J., Z.W., D.L.F., D.M.N., A.J.C., D.J.R.); General Surgery Center of PLA, Southwest Hospital, Third Military Medical University, Chongqing, China (B.T.); Sheila and David Fuente Graduate Program in Cancer Biology, Miller School of Medicine, University of Miami, Miami, Florida (J.L.); Program in Experimental and Molecular Medicine, Department of Pharmacology and Toxicology, Geisel School of Medicine at Dartmouth, Hanover, New Hampshire (D.L.F.); Sylvester Comprehensive Cancer Center, Miller School of Medicine, University of Miami, Miami, Florida (D.M.N., P.R.S., P.R., B.A., A.J.C., D.J.R.); Department of Dermatology, University of Alabama, Birmingham, Alabama (M.A.); Department of Genetic Medicine, Weill Medical College of Cornell University, New York, New York (B.W.); Division of Biostatistics, Department of Public Health Sciences, Miller School of Medicine, University of Miami, Miami, Florida (L. W.); Departments of Medicine (P.R.S., P.R., B.A.) and Biochemistry and Molecular Biology (A.J.C., D.J.R.), Miller School of Medicine, University of Miami, Miami, Florida; and Division of Geriatric Medicine and Palliative Care, Miller School of Medicine, University of Miami, Miami, Florida (P.R.)
| | - Camilla Giambelli
- Molecular Oncology Program, Department of Surgery, Miller School of Medicine, University of Miami, Miami, Florida (B.L., C.G., E.W., J.L., K.J., Z.W., D.L.F., D.M.N., A.J.C., D.J.R.); General Surgery Center of PLA, Southwest Hospital, Third Military Medical University, Chongqing, China (B.T.); Sheila and David Fuente Graduate Program in Cancer Biology, Miller School of Medicine, University of Miami, Miami, Florida (J.L.); Program in Experimental and Molecular Medicine, Department of Pharmacology and Toxicology, Geisel School of Medicine at Dartmouth, Hanover, New Hampshire (D.L.F.); Sylvester Comprehensive Cancer Center, Miller School of Medicine, University of Miami, Miami, Florida (D.M.N., P.R.S., P.R., B.A., A.J.C., D.J.R.); Department of Dermatology, University of Alabama, Birmingham, Alabama (M.A.); Department of Genetic Medicine, Weill Medical College of Cornell University, New York, New York (B.W.); Division of Biostatistics, Department of Public Health Sciences, Miller School of Medicine, University of Miami, Miami, Florida (L. W.); Departments of Medicine (P.R.S., P.R., B.A.) and Biochemistry and Molecular Biology (A.J.C., D.J.R.), Miller School of Medicine, University of Miami, Miami, Florida; and Division of Geriatric Medicine and Palliative Care, Miller School of Medicine, University of Miami, Miami, Florida (P.R.)
| | - Bo Tang
- Molecular Oncology Program, Department of Surgery, Miller School of Medicine, University of Miami, Miami, Florida (B.L., C.G., E.W., J.L., K.J., Z.W., D.L.F., D.M.N., A.J.C., D.J.R.); General Surgery Center of PLA, Southwest Hospital, Third Military Medical University, Chongqing, China (B.T.); Sheila and David Fuente Graduate Program in Cancer Biology, Miller School of Medicine, University of Miami, Miami, Florida (J.L.); Program in Experimental and Molecular Medicine, Department of Pharmacology and Toxicology, Geisel School of Medicine at Dartmouth, Hanover, New Hampshire (D.L.F.); Sylvester Comprehensive Cancer Center, Miller School of Medicine, University of Miami, Miami, Florida (D.M.N., P.R.S., P.R., B.A., A.J.C., D.J.R.); Department of Dermatology, University of Alabama, Birmingham, Alabama (M.A.); Department of Genetic Medicine, Weill Medical College of Cornell University, New York, New York (B.W.); Division of Biostatistics, Department of Public Health Sciences, Miller School of Medicine, University of Miami, Miami, Florida (L. W.); Departments of Medicine (P.R.S., P.R., B.A.) and Biochemistry and Molecular Biology (A.J.C., D.J.R.), Miller School of Medicine, University of Miami, Miami, Florida; and Division of Geriatric Medicine and Palliative Care, Miller School of Medicine, University of Miami, Miami, Florida (P.R.)
| | - Emily Winterbottom
- Molecular Oncology Program, Department of Surgery, Miller School of Medicine, University of Miami, Miami, Florida (B.L., C.G., E.W., J.L., K.J., Z.W., D.L.F., D.M.N., A.J.C., D.J.R.); General Surgery Center of PLA, Southwest Hospital, Third Military Medical University, Chongqing, China (B.T.); Sheila and David Fuente Graduate Program in Cancer Biology, Miller School of Medicine, University of Miami, Miami, Florida (J.L.); Program in Experimental and Molecular Medicine, Department of Pharmacology and Toxicology, Geisel School of Medicine at Dartmouth, Hanover, New Hampshire (D.L.F.); Sylvester Comprehensive Cancer Center, Miller School of Medicine, University of Miami, Miami, Florida (D.M.N., P.R.S., P.R., B.A., A.J.C., D.J.R.); Department of Dermatology, University of Alabama, Birmingham, Alabama (M.A.); Department of Genetic Medicine, Weill Medical College of Cornell University, New York, New York (B.W.); Division of Biostatistics, Department of Public Health Sciences, Miller School of Medicine, University of Miami, Miami, Florida (L. W.); Departments of Medicine (P.R.S., P.R., B.A.) and Biochemistry and Molecular Biology (A.J.C., D.J.R.), Miller School of Medicine, University of Miami, Miami, Florida; and Division of Geriatric Medicine and Palliative Care, Miller School of Medicine, University of Miami, Miami, Florida (P.R.)
| | - Jun Long
- Molecular Oncology Program, Department of Surgery, Miller School of Medicine, University of Miami, Miami, Florida (B.L., C.G., E.W., J.L., K.J., Z.W., D.L.F., D.M.N., A.J.C., D.J.R.); General Surgery Center of PLA, Southwest Hospital, Third Military Medical University, Chongqing, China (B.T.); Sheila and David Fuente Graduate Program in Cancer Biology, Miller School of Medicine, University of Miami, Miami, Florida (J.L.); Program in Experimental and Molecular Medicine, Department of Pharmacology and Toxicology, Geisel School of Medicine at Dartmouth, Hanover, New Hampshire (D.L.F.); Sylvester Comprehensive Cancer Center, Miller School of Medicine, University of Miami, Miami, Florida (D.M.N., P.R.S., P.R., B.A., A.J.C., D.J.R.); Department of Dermatology, University of Alabama, Birmingham, Alabama (M.A.); Department of Genetic Medicine, Weill Medical College of Cornell University, New York, New York (B.W.); Division of Biostatistics, Department of Public Health Sciences, Miller School of Medicine, University of Miami, Miami, Florida (L. W.); Departments of Medicine (P.R.S., P.R., B.A.) and Biochemistry and Molecular Biology (A.J.C., D.J.R.), Miller School of Medicine, University of Miami, Miami, Florida; and Division of Geriatric Medicine and Palliative Care, Miller School of Medicine, University of Miami, Miami, Florida (P.R.)
| | - Ke Jin
- Molecular Oncology Program, Department of Surgery, Miller School of Medicine, University of Miami, Miami, Florida (B.L., C.G., E.W., J.L., K.J., Z.W., D.L.F., D.M.N., A.J.C., D.J.R.); General Surgery Center of PLA, Southwest Hospital, Third Military Medical University, Chongqing, China (B.T.); Sheila and David Fuente Graduate Program in Cancer Biology, Miller School of Medicine, University of Miami, Miami, Florida (J.L.); Program in Experimental and Molecular Medicine, Department of Pharmacology and Toxicology, Geisel School of Medicine at Dartmouth, Hanover, New Hampshire (D.L.F.); Sylvester Comprehensive Cancer Center, Miller School of Medicine, University of Miami, Miami, Florida (D.M.N., P.R.S., P.R., B.A., A.J.C., D.J.R.); Department of Dermatology, University of Alabama, Birmingham, Alabama (M.A.); Department of Genetic Medicine, Weill Medical College of Cornell University, New York, New York (B.W.); Division of Biostatistics, Department of Public Health Sciences, Miller School of Medicine, University of Miami, Miami, Florida (L. W.); Departments of Medicine (P.R.S., P.R., B.A.) and Biochemistry and Molecular Biology (A.J.C., D.J.R.), Miller School of Medicine, University of Miami, Miami, Florida; and Division of Geriatric Medicine and Palliative Care, Miller School of Medicine, University of Miami, Miami, Florida (P.R.)
| | - Zhiqiang Wang
- Molecular Oncology Program, Department of Surgery, Miller School of Medicine, University of Miami, Miami, Florida (B.L., C.G., E.W., J.L., K.J., Z.W., D.L.F., D.M.N., A.J.C., D.J.R.); General Surgery Center of PLA, Southwest Hospital, Third Military Medical University, Chongqing, China (B.T.); Sheila and David Fuente Graduate Program in Cancer Biology, Miller School of Medicine, University of Miami, Miami, Florida (J.L.); Program in Experimental and Molecular Medicine, Department of Pharmacology and Toxicology, Geisel School of Medicine at Dartmouth, Hanover, New Hampshire (D.L.F.); Sylvester Comprehensive Cancer Center, Miller School of Medicine, University of Miami, Miami, Florida (D.M.N., P.R.S., P.R., B.A., A.J.C., D.J.R.); Department of Dermatology, University of Alabama, Birmingham, Alabama (M.A.); Department of Genetic Medicine, Weill Medical College of Cornell University, New York, New York (B.W.); Division of Biostatistics, Department of Public Health Sciences, Miller School of Medicine, University of Miami, Miami, Florida (L. W.); Departments of Medicine (P.R.S., P.R., B.A.) and Biochemistry and Molecular Biology (A.J.C., D.J.R.), Miller School of Medicine, University of Miami, Miami, Florida; and Division of Geriatric Medicine and Palliative Care, Miller School of Medicine, University of Miami, Miami, Florida (P.R.)
| | - Dennis Liang Fei
- Molecular Oncology Program, Department of Surgery, Miller School of Medicine, University of Miami, Miami, Florida (B.L., C.G., E.W., J.L., K.J., Z.W., D.L.F., D.M.N., A.J.C., D.J.R.); General Surgery Center of PLA, Southwest Hospital, Third Military Medical University, Chongqing, China (B.T.); Sheila and David Fuente Graduate Program in Cancer Biology, Miller School of Medicine, University of Miami, Miami, Florida (J.L.); Program in Experimental and Molecular Medicine, Department of Pharmacology and Toxicology, Geisel School of Medicine at Dartmouth, Hanover, New Hampshire (D.L.F.); Sylvester Comprehensive Cancer Center, Miller School of Medicine, University of Miami, Miami, Florida (D.M.N., P.R.S., P.R., B.A., A.J.C., D.J.R.); Department of Dermatology, University of Alabama, Birmingham, Alabama (M.A.); Department of Genetic Medicine, Weill Medical College of Cornell University, New York, New York (B.W.); Division of Biostatistics, Department of Public Health Sciences, Miller School of Medicine, University of Miami, Miami, Florida (L. W.); Departments of Medicine (P.R.S., P.R., B.A.) and Biochemistry and Molecular Biology (A.J.C., D.J.R.), Miller School of Medicine, University of Miami, Miami, Florida; and Division of Geriatric Medicine and Palliative Care, Miller School of Medicine, University of Miami, Miami, Florida (P.R.)
| | - Dao M Nguyen
- Molecular Oncology Program, Department of Surgery, Miller School of Medicine, University of Miami, Miami, Florida (B.L., C.G., E.W., J.L., K.J., Z.W., D.L.F., D.M.N., A.J.C., D.J.R.); General Surgery Center of PLA, Southwest Hospital, Third Military Medical University, Chongqing, China (B.T.); Sheila and David Fuente Graduate Program in Cancer Biology, Miller School of Medicine, University of Miami, Miami, Florida (J.L.); Program in Experimental and Molecular Medicine, Department of Pharmacology and Toxicology, Geisel School of Medicine at Dartmouth, Hanover, New Hampshire (D.L.F.); Sylvester Comprehensive Cancer Center, Miller School of Medicine, University of Miami, Miami, Florida (D.M.N., P.R.S., P.R., B.A., A.J.C., D.J.R.); Department of Dermatology, University of Alabama, Birmingham, Alabama (M.A.); Department of Genetic Medicine, Weill Medical College of Cornell University, New York, New York (B.W.); Division of Biostatistics, Department of Public Health Sciences, Miller School of Medicine, University of Miami, Miami, Florida (L. W.); Departments of Medicine (P.R.S., P.R., B.A.) and Biochemistry and Molecular Biology (A.J.C., D.J.R.), Miller School of Medicine, University of Miami, Miami, Florida; and Division of Geriatric Medicine and Palliative Care, Miller School of Medicine, University of Miami, Miami, Florida (P.R.)
| | - Mohammad Athar
- Molecular Oncology Program, Department of Surgery, Miller School of Medicine, University of Miami, Miami, Florida (B.L., C.G., E.W., J.L., K.J., Z.W., D.L.F., D.M.N., A.J.C., D.J.R.); General Surgery Center of PLA, Southwest Hospital, Third Military Medical University, Chongqing, China (B.T.); Sheila and David Fuente Graduate Program in Cancer Biology, Miller School of Medicine, University of Miami, Miami, Florida (J.L.); Program in Experimental and Molecular Medicine, Department of Pharmacology and Toxicology, Geisel School of Medicine at Dartmouth, Hanover, New Hampshire (D.L.F.); Sylvester Comprehensive Cancer Center, Miller School of Medicine, University of Miami, Miami, Florida (D.M.N., P.R.S., P.R., B.A., A.J.C., D.J.R.); Department of Dermatology, University of Alabama, Birmingham, Alabama (M.A.); Department of Genetic Medicine, Weill Medical College of Cornell University, New York, New York (B.W.); Division of Biostatistics, Department of Public Health Sciences, Miller School of Medicine, University of Miami, Miami, Florida (L. W.); Departments of Medicine (P.R.S., P.R., B.A.) and Biochemistry and Molecular Biology (A.J.C., D.J.R.), Miller School of Medicine, University of Miami, Miami, Florida; and Division of Geriatric Medicine and Palliative Care, Miller School of Medicine, University of Miami, Miami, Florida (P.R.)
| | - Baolin Wang
- Molecular Oncology Program, Department of Surgery, Miller School of Medicine, University of Miami, Miami, Florida (B.L., C.G., E.W., J.L., K.J., Z.W., D.L.F., D.M.N., A.J.C., D.J.R.); General Surgery Center of PLA, Southwest Hospital, Third Military Medical University, Chongqing, China (B.T.); Sheila and David Fuente Graduate Program in Cancer Biology, Miller School of Medicine, University of Miami, Miami, Florida (J.L.); Program in Experimental and Molecular Medicine, Department of Pharmacology and Toxicology, Geisel School of Medicine at Dartmouth, Hanover, New Hampshire (D.L.F.); Sylvester Comprehensive Cancer Center, Miller School of Medicine, University of Miami, Miami, Florida (D.M.N., P.R.S., P.R., B.A., A.J.C., D.J.R.); Department of Dermatology, University of Alabama, Birmingham, Alabama (M.A.); Department of Genetic Medicine, Weill Medical College of Cornell University, New York, New York (B.W.); Division of Biostatistics, Department of Public Health Sciences, Miller School of Medicine, University of Miami, Miami, Florida (L. W.); Departments of Medicine (P.R.S., P.R., B.A.) and Biochemistry and Molecular Biology (A.J.C., D.J.R.), Miller School of Medicine, University of Miami, Miami, Florida; and Division of Geriatric Medicine and Palliative Care, Miller School of Medicine, University of Miami, Miami, Florida (P.R.)
| | - Pochi R Subbarayan
- Molecular Oncology Program, Department of Surgery, Miller School of Medicine, University of Miami, Miami, Florida (B.L., C.G., E.W., J.L., K.J., Z.W., D.L.F., D.M.N., A.J.C., D.J.R.); General Surgery Center of PLA, Southwest Hospital, Third Military Medical University, Chongqing, China (B.T.); Sheila and David Fuente Graduate Program in Cancer Biology, Miller School of Medicine, University of Miami, Miami, Florida (J.L.); Program in Experimental and Molecular Medicine, Department of Pharmacology and Toxicology, Geisel School of Medicine at Dartmouth, Hanover, New Hampshire (D.L.F.); Sylvester Comprehensive Cancer Center, Miller School of Medicine, University of Miami, Miami, Florida (D.M.N., P.R.S., P.R., B.A., A.J.C., D.J.R.); Department of Dermatology, University of Alabama, Birmingham, Alabama (M.A.); Department of Genetic Medicine, Weill Medical College of Cornell University, New York, New York (B.W.); Division of Biostatistics, Department of Public Health Sciences, Miller School of Medicine, University of Miami, Miami, Florida (L. W.); Departments of Medicine (P.R.S., P.R., B.A.) and Biochemistry and Molecular Biology (A.J.C., D.J.R.), Miller School of Medicine, University of Miami, Miami, Florida; and Division of Geriatric Medicine and Palliative Care, Miller School of Medicine, University of Miami, Miami, Florida (P.R.)
| | - Lily Wang
- Molecular Oncology Program, Department of Surgery, Miller School of Medicine, University of Miami, Miami, Florida (B.L., C.G., E.W., J.L., K.J., Z.W., D.L.F., D.M.N., A.J.C., D.J.R.); General Surgery Center of PLA, Southwest Hospital, Third Military Medical University, Chongqing, China (B.T.); Sheila and David Fuente Graduate Program in Cancer Biology, Miller School of Medicine, University of Miami, Miami, Florida (J.L.); Program in Experimental and Molecular Medicine, Department of Pharmacology and Toxicology, Geisel School of Medicine at Dartmouth, Hanover, New Hampshire (D.L.F.); Sylvester Comprehensive Cancer Center, Miller School of Medicine, University of Miami, Miami, Florida (D.M.N., P.R.S., P.R., B.A., A.J.C., D.J.R.); Department of Dermatology, University of Alabama, Birmingham, Alabama (M.A.); Department of Genetic Medicine, Weill Medical College of Cornell University, New York, New York (B.W.); Division of Biostatistics, Department of Public Health Sciences, Miller School of Medicine, University of Miami, Miami, Florida (L. W.); Departments of Medicine (P.R.S., P.R., B.A.) and Biochemistry and Molecular Biology (A.J.C., D.J.R.), Miller School of Medicine, University of Miami, Miami, Florida; and Division of Geriatric Medicine and Palliative Care, Miller School of Medicine, University of Miami, Miami, Florida (P.R.)
| | - Priyamvada Rai
- Molecular Oncology Program, Department of Surgery, Miller School of Medicine, University of Miami, Miami, Florida (B.L., C.G., E.W., J.L., K.J., Z.W., D.L.F., D.M.N., A.J.C., D.J.R.); General Surgery Center of PLA, Southwest Hospital, Third Military Medical University, Chongqing, China (B.T.); Sheila and David Fuente Graduate Program in Cancer Biology, Miller School of Medicine, University of Miami, Miami, Florida (J.L.); Program in Experimental and Molecular Medicine, Department of Pharmacology and Toxicology, Geisel School of Medicine at Dartmouth, Hanover, New Hampshire (D.L.F.); Sylvester Comprehensive Cancer Center, Miller School of Medicine, University of Miami, Miami, Florida (D.M.N., P.R.S., P.R., B.A., A.J.C., D.J.R.); Department of Dermatology, University of Alabama, Birmingham, Alabama (M.A.); Department of Genetic Medicine, Weill Medical College of Cornell University, New York, New York (B.W.); Division of Biostatistics, Department of Public Health Sciences, Miller School of Medicine, University of Miami, Miami, Florida (L. W.); Departments of Medicine (P.R.S., P.R., B.A.) and Biochemistry and Molecular Biology (A.J.C., D.J.R.), Miller School of Medicine, University of Miami, Miami, Florida; and Division of Geriatric Medicine and Palliative Care, Miller School of Medicine, University of Miami, Miami, Florida (P.R.)
| | - Bach Ardalan
- Molecular Oncology Program, Department of Surgery, Miller School of Medicine, University of Miami, Miami, Florida (B.L., C.G., E.W., J.L., K.J., Z.W., D.L.F., D.M.N., A.J.C., D.J.R.); General Surgery Center of PLA, Southwest Hospital, Third Military Medical University, Chongqing, China (B.T.); Sheila and David Fuente Graduate Program in Cancer Biology, Miller School of Medicine, University of Miami, Miami, Florida (J.L.); Program in Experimental and Molecular Medicine, Department of Pharmacology and Toxicology, Geisel School of Medicine at Dartmouth, Hanover, New Hampshire (D.L.F.); Sylvester Comprehensive Cancer Center, Miller School of Medicine, University of Miami, Miami, Florida (D.M.N., P.R.S., P.R., B.A., A.J.C., D.J.R.); Department of Dermatology, University of Alabama, Birmingham, Alabama (M.A.); Department of Genetic Medicine, Weill Medical College of Cornell University, New York, New York (B.W.); Division of Biostatistics, Department of Public Health Sciences, Miller School of Medicine, University of Miami, Miami, Florida (L. W.); Departments of Medicine (P.R.S., P.R., B.A.) and Biochemistry and Molecular Biology (A.J.C., D.J.R.), Miller School of Medicine, University of Miami, Miami, Florida; and Division of Geriatric Medicine and Palliative Care, Miller School of Medicine, University of Miami, Miami, Florida (P.R.)
| | - Anthony J Capobianco
- Molecular Oncology Program, Department of Surgery, Miller School of Medicine, University of Miami, Miami, Florida (B.L., C.G., E.W., J.L., K.J., Z.W., D.L.F., D.M.N., A.J.C., D.J.R.); General Surgery Center of PLA, Southwest Hospital, Third Military Medical University, Chongqing, China (B.T.); Sheila and David Fuente Graduate Program in Cancer Biology, Miller School of Medicine, University of Miami, Miami, Florida (J.L.); Program in Experimental and Molecular Medicine, Department of Pharmacology and Toxicology, Geisel School of Medicine at Dartmouth, Hanover, New Hampshire (D.L.F.); Sylvester Comprehensive Cancer Center, Miller School of Medicine, University of Miami, Miami, Florida (D.M.N., P.R.S., P.R., B.A., A.J.C., D.J.R.); Department of Dermatology, University of Alabama, Birmingham, Alabama (M.A.); Department of Genetic Medicine, Weill Medical College of Cornell University, New York, New York (B.W.); Division of Biostatistics, Department of Public Health Sciences, Miller School of Medicine, University of Miami, Miami, Florida (L. W.); Departments of Medicine (P.R.S., P.R., B.A.) and Biochemistry and Molecular Biology (A.J.C., D.J.R.), Miller School of Medicine, University of Miami, Miami, Florida; and Division of Geriatric Medicine and Palliative Care, Miller School of Medicine, University of Miami, Miami, Florida (P.R.)
| | - David J Robbins
- Molecular Oncology Program, Department of Surgery, Miller School of Medicine, University of Miami, Miami, Florida (B.L., C.G., E.W., J.L., K.J., Z.W., D.L.F., D.M.N., A.J.C., D.J.R.); General Surgery Center of PLA, Southwest Hospital, Third Military Medical University, Chongqing, China (B.T.); Sheila and David Fuente Graduate Program in Cancer Biology, Miller School of Medicine, University of Miami, Miami, Florida (J.L.); Program in Experimental and Molecular Medicine, Department of Pharmacology and Toxicology, Geisel School of Medicine at Dartmouth, Hanover, New Hampshire (D.L.F.); Sylvester Comprehensive Cancer Center, Miller School of Medicine, University of Miami, Miami, Florida (D.M.N., P.R.S., P.R., B.A., A.J.C., D.J.R.); Department of Dermatology, University of Alabama, Birmingham, Alabama (M.A.); Department of Genetic Medicine, Weill Medical College of Cornell University, New York, New York (B.W.); Division of Biostatistics, Department of Public Health Sciences, Miller School of Medicine, University of Miami, Miami, Florida (L. W.); Departments of Medicine (P.R.S., P.R., B.A.) and Biochemistry and Molecular Biology (A.J.C., D.J.R.), Miller School of Medicine, University of Miami, Miami, Florida; and Division of Geriatric Medicine and Palliative Care, Miller School of Medicine, University of Miami, Miami, Florida (P.R.)
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Oh S, Kato M, Zhang C, Guo Y, Beachy PA. A Comparison of Ci/Gli Activity as Regulated by Sufu in Drosophila and Mammalian Hedgehog Response. PLoS One 2015; 10:e0135804. [PMID: 26271100 PMCID: PMC4536226 DOI: 10.1371/journal.pone.0135804] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2015] [Accepted: 07/27/2015] [Indexed: 01/20/2023] Open
Abstract
Suppressor of fused (Su(fu)/Sufu), one of the most conserved components of the Hedgehog (Hh) signaling pathway, binds Ci/Gli transcription factors and impedes activation of target gene expression. In Drosophila, the Su(fu) mutation has a minimal phenotype, and we show here that Ci transcriptional activity in large part is regulated independently of Su(fu) by other pathway components. Mutant mice lacking Sufu in contrast show excessive pathway activity and die as embryos with patterning defects. Here we show that in cultured cells Hh stimulation can augment transcriptional activity of a Gli2 variant lacking Sufu interaction and, surprisingly, that regulation of Hh pathway targets is nearly normal in the neural tube of Sufu-/- mutant embryos that also lack Gli1 function. Some degree of Hh-induced transcriptional activation of Ci/Gli thus can occur independently of Sufu in both flies and mammals. We further note that Sufu loss can also reduce Hh induction of high-threshold neural tube fates, such as floor plate, suggesting a possible positive pathway role for Sufu.
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Affiliation(s)
- Sekyung Oh
- Department of Developmental Biology, Howard Hughes Medical Institute, Stanford University School of Medicine, Stanford, California, United States of America
- Department of Molecular Biology and Genetics, Howard Hughes Medical Institute, The Johns Hopkins University School of Medicine, Baltimore, Maryland, United States of America
| | - Masaki Kato
- Department of Developmental Biology, Howard Hughes Medical Institute, Stanford University School of Medicine, Stanford, California, United States of America
- Department of Molecular Biology and Genetics, Howard Hughes Medical Institute, The Johns Hopkins University School of Medicine, Baltimore, Maryland, United States of America
| | - Chi Zhang
- Department of Molecular Biology and Genetics, Howard Hughes Medical Institute, The Johns Hopkins University School of Medicine, Baltimore, Maryland, United States of America
| | - Yurong Guo
- Division of Pulmonary and Critical Care Medicine, The Johns Hopkins University School of Medicine, Baltimore, Maryland, United States of America
| | - Philip A. Beachy
- Department of Developmental Biology, Howard Hughes Medical Institute, Stanford University School of Medicine, Stanford, California, United States of America
- Department of Molecular Biology and Genetics, Howard Hughes Medical Institute, The Johns Hopkins University School of Medicine, Baltimore, Maryland, United States of America
- Department of Biochemistry, Howard Hughes Medical Institute, Stanford University School of Medicine, Stanford, California, United States of America
- * E-mail:
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Dhanyamraju PK, Holz PS, Finkernagel F, Fendrich V, Lauth M. Histone deacetylase 6 represents a novel drug target in the oncogenic Hedgehog signaling pathway. Mol Cancer Ther 2015; 14:727-39. [PMID: 25552369 DOI: 10.1158/1535-7163.mct-14-0481] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2014] [Accepted: 12/14/2014] [Indexed: 11/16/2022]
Abstract
Uncontrolled Hedgehog (Hh) signaling is the cause of several malignancies, including the pediatric cancer medulloblastoma, a neuroectodermal tumor affecting the cerebellum. Despite the development of potent Hh pathway antagonists, medulloblastoma drug resistance is still an unresolved issue that requires the identification of novel drug targets. Following up on our observation that histone deacetylase 6 (HDAC6) expression was increased in Hh-driven medulloblastoma, we found that this enzyme is essential for full Hh pathway activation. Intriguingly, these stimulatory effects of HDAC6 are partly integrated downstream of primary cilia, a known HDAC6-regulated structure. In addition, HDAC6 is also required for the complete repression of basal Hh target gene expression. These contrasting effects are mediated by HDAC6's impact on Gli2 mRNA and GLI3 protein expression. As a result of this complex interaction with Hh signaling, global transcriptome analysis revealed that HDAC6 regulates only a subset of Smoothened- and Gli-driven genes, including all well-established Hh targets such as Ptch1 or Gli1. Importantly, medulloblastoma cell survival was severely compromised by HDAC6 inhibition in vitro and pharmacologic HDAC6 blockade strongly reduced tumor growth in an in vivo allograft model. In summary, our data describe an important role for HDAC6 in regulating the mammalian Hh pathway and encourage further studies focusing on HDAC6 as a novel drug target in medulloblastoma.
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Affiliation(s)
- Pavan Kumar Dhanyamraju
- Philipps University, Institute of Molecular Biology and Tumor Research (IMT), Center for Tumor Biology and Immunology, Marburg, Germany
| | - Philipp Simon Holz
- Philipps University, Institute of Molecular Biology and Tumor Research (IMT), Center for Tumor Biology and Immunology, Marburg, Germany
| | - Florian Finkernagel
- Philipps University, Institute of Molecular Biology and Tumor Research (IMT), Center for Tumor Biology and Immunology, Marburg, Germany
| | - Volker Fendrich
- Department of Surgery, Philipps University, Marburg, Germany
| | - Matthias Lauth
- Philipps University, Institute of Molecular Biology and Tumor Research (IMT), Center for Tumor Biology and Immunology, Marburg, Germany.
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Polepalli Ramesh B, Sethi RJ, Yu H. Figure-associated text summarization and evaluation. PLoS One 2015; 10:e0115671. [PMID: 25643357 PMCID: PMC4313946 DOI: 10.1371/journal.pone.0115671] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2013] [Accepted: 11/26/2014] [Indexed: 11/18/2022] Open
Abstract
Biomedical literature incorporates millions of figures, which are a rich and important knowledge resource for biomedical researchers. Scientists need access to the figures and the knowledge they represent in order to validate research findings and to generate new hypotheses. By themselves, these figures are nearly always incomprehensible to both humans and machines and their associated texts are therefore essential for full comprehension. The associated text of a figure, however, is scattered throughout its full-text article and contains redundant information content. In this paper, we report the continued development and evaluation of several figure summarization systems, the FigSum+ systems, that automatically identify associated texts, remove redundant information, and generate a text summary for every figure in an article. Using a set of 94 annotated figures selected from 19 different journals, we conducted an intrinsic evaluation of FigSum+. We evaluate the performance by precision, recall, F1, and ROUGE scores. The best FigSum+ system is based on an unsupervised method, achieving F1 score of 0.66 and ROUGE-1 score of 0.97. The annotated data is available at figshare.com (http://figshare.com/articles/Figure_Associated_Text_Summarization_and_Evaluation/858903).
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Affiliation(s)
- Balaji Polepalli Ramesh
- Department of Quantitative Health Sciences, University of Massachusetts Medical School, Worcester, MA, United States of America
| | - Ricky J. Sethi
- Department of Quantitative Health Sciences, University of Massachusetts Medical School, Worcester, MA, United States of America
| | - Hong Yu
- Department of Quantitative Health Sciences, University of Massachusetts Medical School, Worcester, MA, United States of America
- School of Computer Science, University of Massachusetts, Amherst, MA, United States of America
- VA Central Western Massachusetts, Leeds, MA, United States of America
- * E-mail:
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30
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Laporta J, Keil KP, Weaver SR, Cronick CM, Prichard AP, Crenshaw TD, Heyne GW, Vezina CM, Lipinski RJ, Hernandez LL. Serotonin regulates calcium homeostasis in lactation by epigenetic activation of hedgehog signaling. Mol Endocrinol 2014; 28:1866-74. [PMID: 25192038 DOI: 10.1210/me.2014-1204] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
Calcium homeostasis during lactation is critical for maternal and neonatal health. We previously showed that nonneuronal/peripheral serotonin [5-hydroxytryptamine (5-HT)] causes the lactating mammary gland to synthesize and secrete PTHrP in an acute fashion. Here, using a mouse model, we found that genetic inactivation of tryptophan hydroxylase 1 (Tph1), which catalyzes the rate-limiting step in peripheral 5-HT synthesis, reduced circulating and mammary PTHrP expression, osteoclast activity, and maternal circulating calcium concentrations during the transition from pregnancy to lactation. Tph1 inactivation also reduced sonic hedgehog signaling in the mammary gland during lactation. Each of these deficiencies was rescued by daily injections of 5-hydroxy-L-tryptophan (an immediate precursor of 5-HT) to Tph1-deficient dams. We used immortalized mouse embryonic fibroblasts to demonstrate that 5-HT induces PTHrP through a sonic hedgehog-dependent signal transduction mechanism. We also found that 5-HT altered DNA methylation of the Shh gene locus, leading to transcriptional initiation at an alternate start site and formation of a variant transcript in mouse embryonic fibroblasts in vitro and in mammary tissue in vivo. These results support a new paradigm of 5-HT-mediated Shh regulation involving DNA methylation remodeling and promoter switching. In addition to having immediate implications for lactation biology, identification and characterization of a novel functional regulatory relationship between nonneuronal 5-HT, hedgehog signaling, and PTHrP offers new avenues for the study of these important factors in development and disease.
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Affiliation(s)
- Jimena Laporta
- Departments of Dairy Science (J.L., S.R.W., C.M.C., A.P.P., L.L.H.), Comparative Biosciences (K.P.K., G.W.H., C.M.V., R.J.L.), and Animal Science (T.D.C.), University of Wisconsin-Madison, Madison, Wisconsin 53706
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31
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The Yes-associated protein controls the cell density regulation of Hedgehog signaling. Oncogenesis 2014; 3:e112. [PMID: 25111861 PMCID: PMC5189961 DOI: 10.1038/oncsis.2014.27] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2014] [Revised: 06/03/2014] [Accepted: 07/02/2014] [Indexed: 12/18/2022] Open
Abstract
The evolutionarily conserved Hedgehog (Hh) signaling pathway is essential for correct embryogenesis and is misregulated in several malignancies. In cell culture, Hh-sensitive cells display a striking dependence on cell density with active Hh signaling requiring cell-to-cell contact. As the Hippo/YAP system is tightly linked to cell density control and contact inhibition, we investigated the cross-talk between the two pathways. Our data reveal that the suppression of Hh signaling in the absence of cellular contacts is independent of primary cilia and is mediated by the YAP oncogene. Overexpression of YAP blocks Hh signaling whereas RNA interference-mediated knockdown of YAP enhances Hh/GLI activity. Despite this negative regulation, Hh signaling promotes YAP activity through post-transcriptional mechanisms, resulting in a negative feedback loop. In vivo, we found strong nuclear YAP immunoreactivity restricted to compartments with low Hh pathway activity in human and mouse pancreatic cancer. Finally, we identified protease-activated receptors (PARs) as molecules being able to override the inverse Hippo/Hh regulation, potentially giving tumors a mechanism to utilize both oncogenic pathways in parallel.
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Li B, Fei DL, Flaveny CA, Dahmane N, Baubet V, Wang Z, Bai F, Pei XH, Rodriguez-Blanco J, Hang B, Orton D, Han L, Wang B, Capobianco AJ, Lee E, Robbins DJ. Pyrvinium attenuates Hedgehog signaling downstream of smoothened. Cancer Res 2014; 74:4811-21. [PMID: 24994715 DOI: 10.1158/0008-5472.can-14-0317] [Citation(s) in RCA: 58] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
The Hedgehog (HH) signaling pathway represents an important class of emerging developmental signaling pathways that play critical roles in the genesis of a large number of human cancers. The pharmaceutical industry is currently focused on developing small molecules targeting Smoothened (Smo), a key signaling effector of the HH pathway that regulates the levels and activity of the Gli family of transcription factors. Although one of these compounds, vismodegib, is now FDA-approved for patients with advanced basal cell carcinoma, acquired mutations in Smo can result in rapid relapse. Furthermore, many cancers also exhibit a Smo-independent activation of Gli proteins, an observation that may underlie the limited efficacy of Smo inhibitors in clinical trials against other types of cancer. Thus, there remains a critical need for HH inhibitors with different mechanisms of action, particularly those that act downstream of Smo. Recently, we identified the FDA-approved anti-pinworm compound pyrvinium as a novel, potent (IC50, 10 nmol/L) casein kinase-1α (CK1α) agonist. We show here that pyrvinium is a potent inhibitor of HH signaling, which acts by reducing the stability of the Gli family of transcription factors. Consistent with CK1α agonists acting on these most distal components of the HH signaling pathway, pyrvinium is able to inhibit the activity of a clinically relevant, vismodegib -resistant Smo mutant, as well as the Gli activity resulting from loss of the negative regulator suppressor of fused. We go on to demonstrate the utility of this small molecule in vivo, against the HH-dependent cancer medulloblastoma, attenuating its growth and reducing the expression of HH biomarkers.
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Affiliation(s)
- Bin Li
- Molecular Oncology Program, Department of Surgery, University of Miami, Miami, Florida
| | - Dennis Liang Fei
- Molecular Oncology Program, Department of Surgery, University of Miami, Miami, Florida
| | - Colin A Flaveny
- Molecular Oncology Program, Department of Surgery, University of Miami, Miami, Florida
| | - Nadia Dahmane
- Department of Neurosurgery, University of Pennsylvania, Philadelphia, Pennsylvania
| | - Valérie Baubet
- Department of Neurosurgery, University of Pennsylvania, Philadelphia, Pennsylvania
| | - Zhiqiang Wang
- Molecular Oncology Program, Department of Surgery, University of Miami, Miami, Florida
| | - Feng Bai
- Molecular Oncology Program, Department of Surgery, University of Miami, Miami, Florida
| | - Xin-Hai Pei
- Molecular Oncology Program, Department of Surgery, University of Miami, Miami, Florida. Sylvester Cancer Center, University of Miami, Miami, Florida
| | | | - Brian Hang
- Department of Cell and Developmental Biology and Vanderbilt Ingram Cancer Center, Vanderbilt University School of Medicine, Nashville, Tennessee
| | | | - Lu Han
- Molecular Oncology Program, Department of Surgery, University of Miami, Miami, Florida
| | - Baolin Wang
- Weill Medical College, Cornell University, New York, New York
| | - Anthony J Capobianco
- Molecular Oncology Program, Department of Surgery, University of Miami, Miami, Florida. Sylvester Cancer Center, University of Miami, Miami, Florida. Department of Biochemistry and Molecular Biology, University of Miami, Miami, Florida
| | - Ethan Lee
- Department of Cell and Developmental Biology and Vanderbilt Ingram Cancer Center, Vanderbilt University School of Medicine, Nashville, Tennessee
| | - David J Robbins
- Molecular Oncology Program, Department of Surgery, University of Miami, Miami, Florida. Sylvester Cancer Center, University of Miami, Miami, Florida. Department of Biochemistry and Molecular Biology, University of Miami, Miami, Florida.
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Tariki M, Wieczorek SA, Schneider P, Bänfer S, Veitinger S, Jacob R, Fendrich V, Lauth M. RIO kinase 3 acts as a SUFU-dependent positive regulator of Hedgehog signaling. Cell Signal 2013; 25:2668-75. [PMID: 24018050 DOI: 10.1016/j.cellsig.2013.08.037] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2013] [Accepted: 08/30/2013] [Indexed: 11/17/2022]
Abstract
Suppressor of fused (SUFU) is an essential negative regulator of the mammalian Hedgehog (HH) signaling pathway and its loss is associated with cancer development. On a cellular level, endogenous SUFU can mainly be detected in the cytoplasm and the nucleus. However, immunostaining of pancreatic cancer specimen revealed the existence of cell types showing selective enrichment of endogenous SUFU in the nucleus. Following up on this observation, we found that a SUFU construct which was experimentally tethered exclusively to the nucleus was unable to antagonize endogenous HH signaling, in contrast to control SUFU. These data suggest that alterations in the normal subcellular distribution of SUFU might interfere with its established negative role on the HH pathway. Performing a multi-well kinase screen in human cells identified RIO kinase 3 (RIOK3) as a novel modulator of SUFU subcellular distribution. Functionally, RIOK3 acts as a SUFU-dependent positive regulator of HH signaling. Taken together, we propose that factors modulating the nucleo-cytoplasmic distribution of SUFU impact on the normal function of this tumor suppressing protein.
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Affiliation(s)
- Melanie Tariki
- Philipps University, Institute of Molecular Biology and Tumor Research (IMT), Emil-Mannkopff-Str. 2, 35037 Marburg, Germany
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Bijlsma MF, Damhofer H, Roelink H. Hedgehog-stimulated chemotaxis is mediated by smoothened located outside the primary cilium. Sci Signal 2012; 5:ra60. [PMID: 22912493 DOI: 10.1126/scisignal.2002798] [Citation(s) in RCA: 60] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Regulation of the Hedgehog (Hh) pathway relies on an interaction of two receptors. In the absence of Hh, Patched1 (Ptch1) inhibits the pathway. Binding of the ligand Hh to Ptch1 stimulates the localization of the activating receptor Smoothened (Smo) to the primary cilium, which is required for the transcriptional Hh response. Hh can also induce chemotaxis through a nontranscriptional pathway. We assessed the effects of defective ciliary localization of Smo on its subcellular trafficking and ability to mediate chemotactic signaling. Cells expressing mutants of Smo that could not localize to the primary cilium or cells lacking the primary cilium showed altered intracellular trafficking of Smo and, in response to Hh or Smo agonists, decreased transcriptional signaling and enhanced chemotactic responsiveness. Thus, the ciliary localization machinery appears to transport Smo to subcellular sites where it can mediate transcriptional signaling and away from locations where it can mediate chemotactic signaling. The subcellular localization of Smo is thus a crucial determinant of its signaling characteristics and implies the existence of a pool of Smo dedicated to chemotaxis.
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Affiliation(s)
- Maarten F Bijlsma
- Department of Molecular and Cell Biology, University of California, Berkeley, 16 Barker Hall, 3204, Berkeley, CA 94720, USA
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Kandala PK, Srivastava SK. Diindolylmethane-mediated Gli1 protein suppression induces anoikis in ovarian cancer cells in vitro and blocks tumor formation ability in vivo. J Biol Chem 2012; 287:28745-54. [PMID: 22773833 DOI: 10.1074/jbc.m112.351379] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Anoikis is a cell death that occurs due to detachment of a cell from the extracellular matrix (ECM). Resistance to anoikis is a primary feature of a cell that undergoes metastasis. In this study for the first time, we demonstrated the potential role of Gli1 in anoikis resistance. Treatment of various ovarian cancer cells by different concentrations of diindolylmethane (DIM), an active ingredient of cruciferous vegetables, reduced the anoikis resistance in a concentration-dependent manner. Reduction in anoikis resistance was associated with a decrease in the expression of Gli1 and an increase in the cleavage of poly(ADP-ribose) polymerase (PARP). Sonic hedgehog (Shh) treatment not only increased the expression of Gli1, but also blocked anoikis induced by DIM and abrogated the change in the expression of Gli1 and cleaved PARP by DIM. To confirm the role of Gli1, hedgehog inhibitor cyclopamine, Gli1 siRNA and Gli1(-/-) mouse embryonic fibroblasts (MEFs) were used. Cyclopamine treatment alone significantly reduced anoikis resistance in A2780 and OVCAR-429 cells. Cyclopamine-mediated reduction in anoikis resistance was associated with reduced expression of Gli1 and induction of cleaved PARP. Shh treatment blocked cyclopamine-induced anoikis. Silencing Gli1 expression induced anoikis and cleavage of PARP in A2780 and OVCAR-429 cells. Furthermore, Gli1(-/-) MEFs were more sensitive to anoikis compared with Gli1(+/+) MEFs. Our in vivo studies established that DIM- or cyclopamine-treated ovarian cancer cells under suspension culture conditions drastically lost their ability of tumor formation in vivo in mice. Taken together, our results establish that Gli1 is a critical player in anoikis resistance in ovarian cancer.
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Affiliation(s)
- Prabodh K Kandala
- Department of Biomedical Sciences, Texas Tech University Health Sciences Center, Amarillo, Texas 79106, USA
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Polizio AH, Chinchilla P, Chen X, Manning DR, Riobo NA. Sonic Hedgehog activates the GTPases Rac1 and RhoA in a Gli-independent manner through coupling of smoothened to Gi proteins. Sci Signal 2011; 4:pt7. [PMID: 22114142 DOI: 10.1126/scisignal.2002396] [Citation(s) in RCA: 71] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
The vertebrate Hedgehog (Hh) pathway has essential functions during development and tissue homeostasis in normal physiology, and its dysregulation is a common theme in cancer. The Hh ligands (Sonic Hh, Indian Hh, and Desert Hh) bind to the receptors Patched1 and Patched2, resulting in inhibition of their repressive effect on Smoothened (Smo). Smo is a seven-transmembrane protein, which was only recently shown to function as a G protein-coupled receptor (GPCR) with specificity toward the heterotrimeric guanine nucleotide-binding protein G(i). In addition to activating G(i), Smo signals through its C-terminal tail to inhibit Suppressor of Fused, resulting in stabilization and activation of the Gli family of transcription factors, which execute a transcriptional response to so-called "canonical Hh signaling." In this Presentation, we illustrate two outcomes of Hh signaling that are independent of Gli transcriptional activity and, thus, are defined as "noncanonical." One outcome is dependent on Smo coupling to G(i) proteins and exerts changes to the actin cytoskeleton through stimulation of the small guanosine triphosphatases (GTPases) RhoA and Rac1. These cytoskeletal changes promote migration in fibroblasts and tubulogenesis in endothelial cells. Signaling through the other noncanonical Hh pathway is independent of Smo and inhibits Patched1-induced cell death.
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Affiliation(s)
- Ariel H Polizio
- Department of Biochemistry and Molecular Biology, Thomas Jefferson University, Philadelphia, PA 19107, USA
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Abstract
Numerous signaling pathways are misregulated in pancreatic ductal adenocarcinoma (PDAC), a highly malignant type of cancer. One of these is the Hedgehog (HH) pathway, which is normally involved in patterning processes in the developing embryo. Expression of the main ligand Sonic Hedgehog is an early event in carcinogenesis and correlates with the mutation of the KRAS oncogene, the cardinal molecular feature of pancreatic cancer. Recent data establish a functional role for HH signaling primarily in the tumor microenvironment, where it is involved in myofibroblast differentiation and the induction of stroma-derived growth promoting molecules. Given the protumorigenic functions of the abundant stromal desmoplasia typically associated with pancreatic cancer, targeting the HH pathway might prove beneficial in the treatment of the disease. First data using small molecule antagonists of HH signaling in mouse models of pancreatic cancer are promising and reveal a substantial, yet transient, effect on the myofibroblastic stroma. In this review, we try to give an outline on the current knowledge about HH signaling in pancreatic cancer including a perspective of using pharmacological inhibitors of this pathway in the clinic.
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Affiliation(s)
- Matthias Lauth
- Institute of Molecular Biology and Tumor Research (IMT), Philipps University, Marburg, Germany
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Polizio AH, Chinchilla P, Chen X, Kim S, Manning DR, Riobo NA. Heterotrimeric Gi proteins link Hedgehog signaling to activation of Rho small GTPases to promote fibroblast migration. J Biol Chem 2011; 286:19589-96. [PMID: 21474452 DOI: 10.1074/jbc.m110.197111] [Citation(s) in RCA: 117] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Evidence supporting the functionality of Smoothened (SMO), an essential transducer in most pathways engaged by Hedgehog (Hh), as a G(i)-coupled receptor contrasts with the lack of an apparently consistent requirement for G(i) in Hh signal transduction. In the present study, we sought to evaluate the role of SMO-G(i) coupling in fibroblast migration induced by Sonic Hedgehog (Shh). Our results demonstrate an absolute requirement for G(i) in Shh-induced fibroblast migration. We found that Shh acutely stimulates the small Rho GTPases Rac1 and RhoA via SMO through a G(i) protein- and PI3K-dependent mechanism, and that these are required for cell migration. These responses were independent of transcription by Gli and of the C-terminal domain of SMO, as we show using a combination of molecular and genetic tools. Our findings provide a mechanistic model for fibroblast migration in response to Shh and underscore the role of SMO-G(i) coupling in non-canonical Hh signaling.
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Affiliation(s)
- Ariel H Polizio
- Department of Biochemistry and Molecular Biology, Thomas Jefferson University, Philadelphia, Pennsylvania 1910, USA
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Coordinated translocation of mammalian Gli proteins and suppressor of fused to the primary cilium. PLoS One 2010; 5:e15900. [PMID: 21209912 PMCID: PMC3012114 DOI: 10.1371/journal.pone.0015900] [Citation(s) in RCA: 56] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2010] [Accepted: 11/30/2010] [Indexed: 12/03/2022] Open
Abstract
Intracellular transduction of Hedgehog (Hh) signals in mammals requires functional primary cilia. The Hh signaling effectors, the Gli family of transcription factors, and their negative regulator, Suppressor of Fused (Sufu), accumulate at the tips of cilia; however, the molecular mechanism regulating this localization remains elusive. In the current study, we show that the ciliary localization of mammalian Gli proteins depends on both their N-terminal domains and a central region lying C-terminal to the zinc-finger DNA-binding domains. Invertebrate Gli homologs Ci and Tra1, when over-expressed in ciliated mouse fibroblasts, fail to localize to the cilia, suggesting the lack of a vertebrate-specific structural feature required for ciliary localization. We further show that activation of protein kinase A (PKA) efficiently inhibits ciliary localization of Gli2 and Gli3, but only moderately affects the ciliary localization of Gli1. Interestingly, variants of Gli2 mimicking the phosphorylated or non-phosphorylated states of Gli2 are both localized to the cilia, and their ciliary localizations are subjected to the inhibitory effect of PKA activation, suggesting a likely indirect mechanism underlying the roles of PKA in Gli ciliary localization. Finally, we show that ciliary localization of Sufu is dependent on ciliary-localized Gli proteins, and is inhibited by PKA activation, suggesting a coordinated mechanism for the ciliary translocation of Sufu and Gli proteins.
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Lipinski RJ, Bushman W. Identification of Hedgehog signaling inhibitors with relevant human exposure by small molecule screening. Toxicol In Vitro 2010; 24:1404-9. [PMID: 20434536 DOI: 10.1016/j.tiv.2010.04.011] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2009] [Revised: 02/25/2010] [Accepted: 04/24/2010] [Indexed: 01/10/2023]
Abstract
In animal models, chemical disruption of the Hedgehog (Hh) signaling pathway during embryonic development causes severe birth defects including holoprosencephaly and cleft lip and palate. The exact etiological basis of correlate human birth defects remains uncertain but is likely multifactorial, involving the interaction of genetic and environmental or chemical influences. The Hh transduction mechanism relies upon endogenous small molecule regulation, conferring remarkable pathway sensitivity to inhibition by a structurally diverse set of exogenous small molecules. Here, we employed small molecule screening to identify human exposure-relevant Hh signaling inhibitors. From a library of 4240 compounds, including pharmaceuticals, natural products, and pesticides, three putative Hh pathway inhibitors were identified: tolnaftate, an antifungal agent; ipriflavone, a dietary supplement; and 17-beta-estradiol, a human hormone and pharmaceutical agent. Each compound inhibited Hh signaling in both mouse and human cells. Dose-response assays determined the three compounds to be 8- to 30-fold less potent than the index Hh pathway inhibitor cyclopamine. Despite current limitations in chemical library availability, which narrowed the scope of this study to only a small fraction of all human exposure-relevant small molecules, three structurally diverse environmental Hh signaling inhibitors were identified, highlighting an inherent pathway vulnerability to teratogenic influences.
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Affiliation(s)
- Robert J Lipinski
- Molecular and Environmental Toxicology Center, School of Medicine and Public Health, University of Wisconsin-Madison, Madison, WI 27599, USA.
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Abstract
The Hedgehog (Hh) family of secreted proteins governs a wide variety of processes during embryonic development and adult tissue homeostasis. Here we review the current understanding of the molecular and cellular basis of Hh morphogen gradient formation and signal transduction, and the multifaceted roles of Hh signaling in development and tumorigenesis. We discuss how the Hh pathway has diverged during evolution and how it integrates with other signaling pathways to control cell growth and patterning.
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Affiliation(s)
- Jin Jiang
- Department of Developmental Biology, University of Texas Southwestern Medical Center at Dallas, Dallas, TX 75390, USA.
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