1
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Fung L, Dranow DB, Subramanian A, Libby N, Schilling TF. Cellular retinoic acid-binding proteins regulate germ cell proliferation and sex determination in zebrafish. Development 2024; 151:dev202549. [PMID: 39575928 DOI: 10.1242/dev.202549] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2023] [Accepted: 10/30/2024] [Indexed: 12/14/2024]
Abstract
Cellular retinoic acid (RA)-binding proteins (Crabps) solubilize intracellular RA and transport it to its nuclear receptors or cytoplasmic degradation enzymes. Despite their extreme conservation across chordates, genetic studies of Crabp function have revealed few essential functions. We have generated loss-of-function mutations in all four zebrafish Crabps and find essential roles for Crabp2 proteins in gonad development and sex determination. Transgenic RA reporters show strong RA responses in germ cells at the bipotential stage of gonad development. Double mutants lacking the functions of both Crabp2a and Crabp2b predominantly become male, which correlates with their smaller gonad size and reduced germ cell proliferation during gonad development at late larval and early juvenile stages. In contrast, mutants lacking the functions of both Crabp1a and Crabp1b have normal sex ratios. Exogenous RA treatments at bipotential gonad stages increase germ cell number, consistent with a direct role for RA in promoting germ cell proliferation. Our results suggest essential functions for Crabps in gonad development and sex determination.
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Affiliation(s)
- Lianna Fung
- Department of Developmental and Cell Biology, University of California, Irvine, CA 92697-2300, USA
| | - Daniel B Dranow
- Department of Developmental and Cell Biology, University of California, Irvine, CA 92697-2300, USA
| | - Arul Subramanian
- Department of Developmental and Cell Biology, University of California, Irvine, CA 92697-2300, USA
| | - Natalia Libby
- Department of Developmental and Cell Biology, University of California, Irvine, CA 92697-2300, USA
| | - Thomas F Schilling
- Department of Developmental and Cell Biology, University of California, Irvine, CA 92697-2300, USA
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2
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Pastok MW, Tomlinson CWE, Turberville S, Butler AM, Baslé A, Noble MEM, Endicott JA, Pohl E, Tatum NJ. Structural requirements for the specific binding of CRABP2 to cyclin D3. Structure 2024; 32:2301-2315.e6. [PMID: 39419021 DOI: 10.1016/j.str.2024.09.020] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2021] [Revised: 07/31/2024] [Accepted: 09/20/2024] [Indexed: 10/19/2024]
Abstract
Cellular retinoic acid binding protein 2 (CRABP2) transports retinoic acid from the cytoplasm to the nucleus where it then transfers its cargo to retinoic acid receptor-containing complexes leading to activation of gene transcription. We demonstrate using purified proteins that CRABP2 is also a cyclin D3-specific binding protein and that the CRABP2 cyclin D3 binding site and the proposed CRABP2 nuclear localization sequence overlap. Both sequences are within the helix-loop-helix motif that forms a lid to the retinoic acid binding pocket. Mutations within this sequence that block both cyclin D3 and retinoic acid binding promote formation of a CRABP2 structure in which the retinoic acid binding pocket is occupied by an alternative lid conformation. Structural and functional analysis of CRABP2 and cyclin D3 mutants combined with AlphaFold models of the ternary CDK4/6-cyclin D3-CRABP2 complex supports the identification of an α-helical protein binding site on the cyclin D3 C-terminal cyclin box fold.
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Affiliation(s)
- Martyna W Pastok
- Newcastle University Centre for Cancer, Translational and Clinical Research Institute, Newcastle University, Paul O'Gorman Building, Framlington Place, Newcastle upon Tyne NE2 4HH, UK.
| | - Charles W E Tomlinson
- Department of Chemistry, Durham University, Lower Mountjoy, South Road, Durham DH1 3LE, UK
| | - Shannon Turberville
- Newcastle University Centre for Cancer, Translational and Clinical Research Institute, Newcastle University, Paul O'Gorman Building, Framlington Place, Newcastle upon Tyne NE2 4HH, UK
| | - Abbey M Butler
- Department of Chemistry, Durham University, Lower Mountjoy, South Road, Durham DH1 3LE, UK
| | - Arnaud Baslé
- Biosciences Institute, Newcastle University, Framlington Place, Newcastle upon Tyne NE2 4HH, UK
| | - Martin E M Noble
- Newcastle University Centre for Cancer, Translational and Clinical Research Institute, Newcastle University, Paul O'Gorman Building, Framlington Place, Newcastle upon Tyne NE2 4HH, UK
| | - Jane A Endicott
- Newcastle University Centre for Cancer, Translational and Clinical Research Institute, Newcastle University, Paul O'Gorman Building, Framlington Place, Newcastle upon Tyne NE2 4HH, UK.
| | - Ehmke Pohl
- Department of Chemistry, Durham University, Lower Mountjoy, South Road, Durham DH1 3LE, UK; Department of Biosciences, Durham University, Upper Mountjoy, South Road, Durham DH1 3LE, UK
| | - Natalie J Tatum
- Newcastle University Centre for Cancer, Translational and Clinical Research Institute, Newcastle University, Paul O'Gorman Building, Framlington Place, Newcastle upon Tyne NE2 4HH, UK.
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3
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Shteinfer-Kuzmine A, Verma A, Bornshten R, Ben Chetrit E, Ben-Ya'acov A, Pahima H, Rubin E, Mograbi Y, Shteyer E, Shoshan-Barmatz V. Elevated serum mtDNA in COVID-19 patients is linked to SARS-CoV-2 envelope protein targeting mitochondrial VDAC1, inducing apoptosis and mtDNA release. Apoptosis 2024; 29:2025-2046. [PMID: 39375263 PMCID: PMC11550248 DOI: 10.1007/s10495-024-02025-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/23/2024] [Indexed: 10/09/2024]
Abstract
Mitochondria dysfunction is implicated in cell death, inflammation, and autoimmunity. During viral infections, some viruses employ different strategies to disrupt mitochondria-dependent apoptosis, while others, including SARS-CoV-2, induce host cell apoptosis to facilitate replication and immune system modulation. Given mitochondrial DNAs (mtDNA) role as a pro-inflammatory damage-associated molecular pattern in inflammatory diseases, we examined its levels in the serum of COVID-19 patients and found it to be high relative to levels in healthy donors. Furthermore, comparison of serum protein profiles between healthy individuals and SARS-CoV-2-infected patients revealed unique bands in the COVID-19 patients. Using mass spectroscopy, we identified over 15 proteins, whose levels in the serum of COVID-19 patients were 4- to 780-fold higher. As mtDNA release from the mitochondria is mediated by the oligomeric form of the mitochondrial-gatekeeper-the voltage-dependent anion-selective channel 1 (VDAC1)-we investigated whether SARS-CoV-2 protein alters VDAC1 expression. Among the three selected SARS-CoV-2 proteins, small envelope (E), nucleocapsid (N), and accessory 3b proteins, the E-protein induced VDAC1 overexpression, VDAC1 oligomerization, cell death, and mtDNA release. Additionally, this protein led to mitochondrial dysfunction, as evidenced by increased mitochondrial ROS production and cytosolic Ca2+ levels. These findings suggest that SARS-CoV-2 E-protein induces mitochondrial dysfunction, apoptosis, and mtDNA release via VDAC1 modulation. mtDNA that accumulates in the blood activates the cGAS-STING pathway, triggering inflammatory cytokine and chemokine expression that contribute to the cytokine storm and tissue damage seen in cases of severe COVID-19.
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Affiliation(s)
| | - Ankit Verma
- National Institute for Biotechnology in the Negev, Beer-Sheva, Israel
- Department of Life Sciences, Ben-Gurion University of the Negev, 84105, Beer-Sheva, Israel
| | - Rut Bornshten
- The Shraga Segal Dept. of Microbiology, Immunology and Genetics, Ben-Gurion University of the Negev, 84105, Beer-Sheva, Israel
| | - Eli Ben Chetrit
- Infectious Diseases Unit, Shaare Zedek Medical Center, Hebrew University School of Medicine, Jerusalem, Israel
| | - Ami Ben-Ya'acov
- Shaare Zedek Medical Center, The Juliet Keidan Institute of Paediatric Gastroenterology, Jerusalem, Israel
| | - Hadas Pahima
- Department of Life Sciences, Ben-Gurion University of the Negev, 84105, Beer-Sheva, Israel
| | - Ethan Rubin
- The Shraga Segal Dept. of Microbiology, Immunology and Genetics, Ben-Gurion University of the Negev, 84105, Beer-Sheva, Israel
- Shaare Zedek Medical Center, The Juliet Keidan Institute of Paediatric Gastroenterology, Jerusalem, Israel
| | | | - Eyal Shteyer
- Shaare Zedek Medical Center, The Juliet Keidan Institute of Paediatric Gastroenterology, Jerusalem, Israel
| | - Varda Shoshan-Barmatz
- National Institute for Biotechnology in the Negev, Beer-Sheva, Israel.
- Department of Life Sciences, Ben-Gurion University of the Negev, 84105, Beer-Sheva, Israel.
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4
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Isoherranen N, Wen YW. The interplay between retinoic acid binding proteins and retinoic acid degrading enzymes in modulating retinoic acid concentrations. Curr Top Dev Biol 2024; 161:167-200. [PMID: 39870433 DOI: 10.1016/bs.ctdb.2024.09.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2025]
Abstract
The active metabolite of vitamin A, all-trans-retinoic acid (atRA), is critical for maintenance of many cellular processes. Although the enzymes that can synthesize and clear atRA in mammals have been identified, their tissue and cell-type specific roles are still not fully established. Based on the plasma protein binding, tissue distribution and lipophilicity of atRA, atRA partitions extensively to lipid membranes and other neutral lipids in cells. As a consequence, free atRA concentrations in cells are expected to be exceedingly low. As such mechanisms must exist that allow sufficiently high atRA concentrations to occur for binding to retinoic acid receptor (RARs) and for RAR mediated signaling. Kinetic simulations suggest that cellular retinoic acid binding proteins (CRABPs) provide a cytosolic reservoir for atRA to allow high enough cytosolic concentrations that enable RAR signaling. Yet, the different CRABP family members CRABP1 and CRABP2 may serve different functions in this context. CRABP1 may reside in the cytosol as a member of a cytosolic signalosome and CRABP2 may bind atRA in the cytosol and localize to the nucleus. Both CRABPs appear to interact with the atRA-degrading cytochrome P450 (CYP) family 26 enzymes in the endoplasmic reticulum. These interactions, together with the expression levels of the CRABPs and CYP26s, likely modulate cellular atRA concentration gradients and tissue atRA concentrations in a tightly coordinated manner. This review provides a summary of the current knowledge of atRA distribution, metabolism and protein binding and how these characteristics may alter tissue atRA concentrations.
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Affiliation(s)
- Nina Isoherranen
- Department of Pharmaceutics, School of Pharmacy, University of Washington.
| | - Yue Winnie Wen
- Department of Pharmaceutics, School of Pharmacy, University of Washington
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5
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Marino V, Phromkrasae W, Bertacchi M, Cassini P, Chakrabandhu K, Dell'Orco D, Studer M. Disrupted protein interaction dynamics in a genetic neurodevelopmental disorder revealed by structural bioinformatics and genetic code expansion. Protein Sci 2024; 33:e4953. [PMID: 38511490 PMCID: PMC10955615 DOI: 10.1002/pro.4953] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2023] [Revised: 02/13/2024] [Accepted: 02/17/2024] [Indexed: 03/22/2024]
Abstract
Deciphering the structural effects of gene variants is essential for understanding the pathophysiological mechanisms of genetic diseases. Using a neurodevelopmental disorder called Bosch-Boonstra-Schaaf Optic Atrophy Syndrome (BBSOAS) as a genetic disease model, we applied structural bioinformatics and Genetic Code Expansion (GCE) strategies to assess the pathogenic impact of human NR2F1 variants and their binding with known and novel partners. While the computational analyses of the NR2F1 structure delineated the molecular basis of the impact of several variants on the isolated and complexed structures, the GCE enabled covalent and site-specific capture of transient supramolecular interactions in living cells. This revealed the variable quaternary conformations of NR2F1 variants and highlighted the disrupted interplay with dimeric partners and the newly identified co-factor, CRABP2. The disclosed consequence of the pathogenic mutations on the conformation, supramolecular interplay, and alterations in the cell cycle, viability, and sub-cellular localization of the different variants reflect the heterogeneous disease spectrum of BBSOAS and set up novel foundation for unveiling the complexity of neurodevelopmental diseases.
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Affiliation(s)
- Valerio Marino
- Department of Neurosciences, Biomedicine and Movement Sciences, Section of Biological ChemistryUniversity of VeronaVeronaItaly
| | | | | | - Paul Cassini
- University Côte d'Azur, CNRS, Inserm, iBVNiceFrance
| | | | - Daniele Dell'Orco
- Department of Neurosciences, Biomedicine and Movement Sciences, Section of Biological ChemistryUniversity of VeronaVeronaItaly
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6
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Yin M, Ishida K, Liang X, Lai Y, Unadkat JD. Interpretation of Protein-Mediated Uptake of Statins by Hepatocytes Is Confounded by the Residual Statin-Protein Complex. Drug Metab Dispos 2023; 51:1381-1390. [PMID: 37429727 DOI: 10.1124/dmd.123.001386] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2023] [Revised: 06/29/2023] [Accepted: 07/05/2023] [Indexed: 07/12/2023] Open
Abstract
Inclusion of plasma (or plasma proteins) in human hepatocyte uptake studies narrows, but does not close, the gap in in vitro to in vivo extrapolation (IVIVE) of organic anion transporting polypeptide (OATP)-mediated hepatic clearance (CLh) of statins. We have previously shown that this "apparent" protein-mediated uptake effect (PMUE) of statins by OATP1B1-expressing cells, in the presence of 5% human serum albumin (HSA), is mostly an artifact caused by residual statin-HSA complex remaining in the uptake assay. We determined if the same was true with plated human hepatocytes (PHH) and if this artifact can be reduced using suspended human hepatocytes (SHH) and the oil-spin method. We quantified the uptake of a cocktail of five statins by PHH and SHH in the absence and presence of 5% HSA. After terminating the uptake assay, the amount of residual HSA was quantified by quantitative targeted proteomics. For both PHH and SHH, except for atorvastatin and cerivastatin, the increase in total, active, and passive uptake of the statins, in the presence of 5% HSA, was explained by the estimated residual stain-HSA complex. In addition, the increase in active statin uptake by SHH, where present, was marginal (<50%), much smaller than that observed with PHH. Such a marginal increase cannot bridge the gap in IVIVE of CLh of statins. These data disprove the prevailing hypotheses for the in vitro PMUE. A true PMUE should be evaluated using the uptake data corrected for the residual drug-protein complex. SIGNIFICANCE STATEMENT: We show that the apparent protein-mediated uptake (PMUE) of statins by human hepatocytes is largely confounded by residual statin when plated or suspended human hepatocytes are used. Therefore, mechanisms other than PMUE need to be explored to explain the underprediction of the in vivo human hepatic clearance of statins by human hepatocyte uptake assays.
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Affiliation(s)
- Mengyue Yin
- Department of Pharmaceutics, University of Washington, Seattle, Washington (M.Y., J.D.U.); and Drug Metabolism, Gilead Sciences, Inc., Foster City, California (K.I., X.L., Y.L.)
| | - Kazuya Ishida
- Department of Pharmaceutics, University of Washington, Seattle, Washington (M.Y., J.D.U.); and Drug Metabolism, Gilead Sciences, Inc., Foster City, California (K.I., X.L., Y.L.)
| | - Xiaomin Liang
- Department of Pharmaceutics, University of Washington, Seattle, Washington (M.Y., J.D.U.); and Drug Metabolism, Gilead Sciences, Inc., Foster City, California (K.I., X.L., Y.L.)
| | - Yurong Lai
- Department of Pharmaceutics, University of Washington, Seattle, Washington (M.Y., J.D.U.); and Drug Metabolism, Gilead Sciences, Inc., Foster City, California (K.I., X.L., Y.L.)
| | - Jashvant D Unadkat
- Department of Pharmaceutics, University of Washington, Seattle, Washington (M.Y., J.D.U.); and Drug Metabolism, Gilead Sciences, Inc., Foster City, California (K.I., X.L., Y.L.)
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7
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Larange A, Takazawa I, Kakugawa K, Thiault N, Ngoi S, Olive ME, Iwaya H, Seguin L, Vicente-Suarez I, Becart S, Verstichel G, Balancio A, Altman A, Chang JT, Taniuchi I, Lillemeier B, Kronenberg M, Myers SA, Cheroutre H. A regulatory circuit controlled by extranuclear and nuclear retinoic acid receptor α determines T cell activation and function. Immunity 2023; 56:2054-2069.e10. [PMID: 37597518 PMCID: PMC10552917 DOI: 10.1016/j.immuni.2023.07.017] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2022] [Revised: 03/08/2023] [Accepted: 07/25/2023] [Indexed: 08/21/2023]
Abstract
Ligation of retinoic acid receptor alpha (RARα) by RA promotes varied transcriptional programs associated with immune activation and tolerance, but genetic deletion approaches suggest the impact of RARα on TCR signaling. Here, we examined whether RARα would exert roles beyond transcriptional regulation. Specific deletion of the nuclear isoform of RARα revealed an RARα isoform in the cytoplasm of T cells. Extranuclear RARα was rapidly phosphorylated upon TCR stimulation and recruited to the TCR signalosome. RA interfered with extranuclear RARα signaling, causing suboptimal TCR activation while enhancing FOXP3+ regulatory T cell conversion. TCR activation induced the expression of CRABP2, which translocates RA to the nucleus. Deletion of Crabp2 led to increased RA in the cytoplasm and interfered with signalosome-RARα, resulting in impaired anti-pathogen immunity and suppressed autoimmune disease. Our findings underscore the significance of subcellular RA/RARα signaling in T cells and identify extranuclear RARα as a component of the TCR signalosome and a determinant of immune responses.
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Affiliation(s)
- Alexandre Larange
- Center for Autoimmunity and Inflammation, La Jolla Institute for Immunology, La Jolla, CA 92037, USA; Center for Cancer Immunotherapy, La Jolla Institute for Immunology, La Jolla, CA 92037, USA
| | - Ikuo Takazawa
- Center for Autoimmunity and Inflammation, La Jolla Institute for Immunology, La Jolla, CA 92037, USA; Center for Cancer Immunotherapy, La Jolla Institute for Immunology, La Jolla, CA 92037, USA
| | - Kiyokazu Kakugawa
- Laboratory for Immune Crosstalk, RIKEN Center for Integrative Medical Sciences, 1-7-22 Suehiro, Tsurumi-ku, Yokohama 230-0045, Japan
| | - Nicolas Thiault
- Center for Autoimmunity and Inflammation, La Jolla Institute for Immunology, La Jolla, CA 92037, USA; Center for Cancer Immunotherapy, La Jolla Institute for Immunology, La Jolla, CA 92037, USA
| | - SooMun Ngoi
- School of Biological Sciences, University of California San Diego, La Jolla, CA 92093, USA
| | - Meagan E Olive
- Broad Institute of Massachusetts Institute of Technology and Harvard, Cambridge, MA 02142, USA
| | - Hitoshi Iwaya
- Center for Autoimmunity and Inflammation, La Jolla Institute for Immunology, La Jolla, CA 92037, USA; Center for Cancer Immunotherapy, La Jolla Institute for Immunology, La Jolla, CA 92037, USA
| | - Laetitia Seguin
- Center for Autoimmunity and Inflammation, La Jolla Institute for Immunology, La Jolla, CA 92037, USA; Center for Cancer Immunotherapy, La Jolla Institute for Immunology, La Jolla, CA 92037, USA
| | - Ildefonso Vicente-Suarez
- Center for Autoimmunity and Inflammation, La Jolla Institute for Immunology, La Jolla, CA 92037, USA; Center for Cancer Immunotherapy, La Jolla Institute for Immunology, La Jolla, CA 92037, USA
| | - Stephane Becart
- Center for Autoimmunity and Inflammation, La Jolla Institute for Immunology, La Jolla, CA 92037, USA; Center for Cancer Immunotherapy, La Jolla Institute for Immunology, La Jolla, CA 92037, USA
| | - Greet Verstichel
- Center for Autoimmunity and Inflammation, La Jolla Institute for Immunology, La Jolla, CA 92037, USA; Center for Cancer Immunotherapy, La Jolla Institute for Immunology, La Jolla, CA 92037, USA
| | - Ann Balancio
- Center for Autoimmunity and Inflammation, La Jolla Institute for Immunology, La Jolla, CA 92037, USA; Center for Cancer Immunotherapy, La Jolla Institute for Immunology, La Jolla, CA 92037, USA
| | - Amnon Altman
- Center for Autoimmunity and Inflammation, La Jolla Institute for Immunology, La Jolla, CA 92037, USA; Center for Cancer Immunotherapy, La Jolla Institute for Immunology, La Jolla, CA 92037, USA
| | - John T Chang
- School of Biological Sciences, University of California San Diego, La Jolla, CA 92093, USA
| | - Ichiro Taniuchi
- Laboratory for Transcriptional Regulation, RIKEN Center for Integrative Medical Sciences, 1-7-22 Suehiro, Tsurumi-ku, Yokohama 230-0045, Japan
| | - Bjorn Lillemeier
- Immunobiology and Microbial Pathogenesis Laboratory, IMPL-L, Salk Institute for Biological Studies, La Jolla, CA 92037, USA
| | - Mitchell Kronenberg
- Center for Autoimmunity and Inflammation, La Jolla Institute for Immunology, La Jolla, CA 92037, USA; School of Biological Sciences, University of California San Diego, La Jolla, CA 92093, USA; Center for Infectious Disease and Vaccine Research, La Jolla Institute for Immunology, La Jolla, CA 92037, USA
| | - Samuel A Myers
- Center for Autoimmunity and Inflammation, La Jolla Institute for Immunology, La Jolla, CA 92037, USA; Broad Institute of Massachusetts Institute of Technology and Harvard, Cambridge, MA 02142, USA; Laboratory for Immunochemical Circuits, La Jolla Institute for Immunology, La Jolla, CA 92037, USA.
| | - Hilde Cheroutre
- Center for Autoimmunity and Inflammation, La Jolla Institute for Immunology, La Jolla, CA 92037, USA; Center for Cancer Immunotherapy, La Jolla Institute for Immunology, La Jolla, CA 92037, USA; Laboratory for Immune Crosstalk, RIKEN Center for Integrative Medical Sciences, 1-7-22 Suehiro, Tsurumi-ku, Yokohama 230-0045, Japan.
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8
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Schulz JA, Stresser DM, Kalvass JC. Plasma Protein-Mediated Uptake and Contradictions to the Free Drug Hypothesis: A Critical Review. Drug Metab Rev 2023:1-34. [PMID: 36971325 DOI: 10.1080/03602532.2023.2195133] [Citation(s) in RCA: 20] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/29/2023]
Abstract
According to the free drug hypothesis (FDH), only free, unbound drug is available to interact with biological targets. This hypothesis is the fundamental principle that continues to explain the vast majority of all pharmacokinetic and pharmacodynamic processes. Under the FDH, the free drug concentration at the target site is considered the driver of pharmacodynamic activity and pharmacokinetic processes. However, deviations from the FDH are observed in hepatic uptake and clearance predictions, where observed unbound intrinsic hepatic clearance (CLint,u) is larger than expected. Such deviations are commonly observed when plasma proteins are present and form the basis of the so-called plasma protein-mediated uptake effect (PMUE). This review will discuss the basis of plasma protein binding as it pertains to hepatic clearance based on the FDH, as well as several hypotheses that may explain the underlying mechanisms of PMUE. Notably, some, but not all, potential mechanisms remained aligned with the FDH. Finally, we will outline possible experimental strategies to elucidate PMUE mechanisms. Understanding the mechanisms of PMUE and its potential contribution to clearance underprediction is vital to improving the drug development process.
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9
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Jeong H, Armstrong AT, Isoherranen N, Czuba L, Yang A, Zumpf K, Ciolino J, Torres E, Stika CS, Wisner KL. Temporal changes in the systemic concentrations of retinoids in pregnant and postpartum women. PLoS One 2023; 18:e0280424. [PMID: 36795769 PMCID: PMC9934425 DOI: 10.1371/journal.pone.0280424] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2022] [Accepted: 01/02/2023] [Indexed: 02/17/2023] Open
Abstract
Retinoids and vitamin A are essential for multiple biological functions, including vision and immune responses, as well as the development of an embryo during pregnancy. Despite its importance, alterations in retinoid homeostasis during normal human pregnancy are incompletely understood. We aimed to characterize the temporal changes in the systemic retinoid concentrations across pregnancy and postpartum period. Monthly blood samples were collected from twenty healthy pregnant women, and plasma concentrations of retinol, all-trans-retinoic acid (atRA), 13-cis-retinoic acid (13cisRA), and 4-oxo-retinoic acids were measured using liquid chromatography-tandem mass spectrometry. Significant decreases in 13cisRA concentrations over the pregnancy were observed, with rebound increases in retinol and 13cisRA levels after delivery. Of note, atRA concentrations exhibited a unique temporal pattern with levels peaking at mid-pregnancy. While the 4-oxo-atRA concentration was below the limit of quantification, 4-oxo-13cisRA was readily detectable, and its temporal change mimicked that of 13cisRA. The time profiles of atRA and 13cisRA remained similar after correction by albumin levels for plasma volume expansion adjustment. Together, the comprehensive profiling of systemic retinoid concentrations over the course of pregnancy provides insights into pregnancy-mediated changes in retinoid disposition to maintain its homeostasis.
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Affiliation(s)
- Hyunyoung Jeong
- Department of Industrial and Physical Pharmacy and Pharmacy Practice, College of Pharmacy, Purdue University, West Lafayette, IN, United States of America
- Department of Pharmacy Practice, College of Pharmacy, Purdue University, West Lafayette, IN, United States of America
| | - Abigail T. Armstrong
- Department of Industrial and Physical Pharmacy and Pharmacy Practice, College of Pharmacy, Purdue University, West Lafayette, IN, United States of America
| | - Nina Isoherranen
- Department of Pharmaceutics, School of Pharmacy, University of Washington, Seattle, WA, United States of America
| | - Lindsay Czuba
- Department of Pharmaceutics, School of Pharmacy, University of Washington, Seattle, WA, United States of America
| | - Amy Yang
- Department of Preventive Medicine (Biostatistics), Northwestern University Feinberg School of Medicine, Chicago, IL, United States of America
| | - Katelynn Zumpf
- Department of Preventive Medicine (Biostatistics), Northwestern University Feinberg School of Medicine, Chicago, IL, United States of America
| | - Jody Ciolino
- Department of Preventive Medicine (Biostatistics), Northwestern University Feinberg School of Medicine, Chicago, IL, United States of America
| | - Elizabeth Torres
- Department of Psychiatry and Behavioral Sciences, Northwestern University Feinberg School of Medicine, Chicago, IL, United States of America
| | - Catherine S. Stika
- Department of Obstetrics and Gynecology, Northwestern University Feinberg School of Medicine, Chicago, IL, United States of America
| | - Katherine L. Wisner
- Department of Psychiatry and Behavioral Sciences, Northwestern University Feinberg School of Medicine, Chicago, IL, United States of America
- Department of Obstetrics and Gynecology, Northwestern University Feinberg School of Medicine, Chicago, IL, United States of America
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10
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Guo Z, Zhao Y, Wu Y, Zhang Y, Wang R, Liu W, Zhang C, Yang X. Cellular retinol-binding protein 1: a therapeutic and diagnostic tumor marker. Mol Biol Rep 2023; 50:1885-1894. [PMID: 36515825 DOI: 10.1007/s11033-022-08179-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2022] [Accepted: 12/06/2022] [Indexed: 12/15/2022]
Abstract
Cellular Retinol Binding Protein 1 (CRBP1) gene is a protein coding gene located on human chromosome 3q21, which codifies a protein named CRBP1. CRBP1 is widely expressed in many tissues as a chaperone protein to regulate the uptake, subsequent esterification and bioavailability of retinol. CRBP1 combines retinol and retinaldehyde with high affinity to protect retinoids from non-specific oxidation, and transports retinoids to specific enzymes to promote the biosynthesis of retinoic acid. The vital role of CRBP1 in retinoids metabolism has been gradually discovered, which has been implicated in tumorigenesis. However, the precise functions of CRBP1 in different diseases are still poorly understood. The purpose of this review is to provide an overview of the role of CRBP1 in various diseases, especially in both the promotion and inhibition of cancers, which may also offer a novel biomarker and potential therapeutic target for human diseases.
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Affiliation(s)
- Zhiyuan Guo
- College of Life Science, Henan Normal University, Xinxiang, 453007, China
- State Key Laboratory Cultivation Base for Cell Differentiation Regulation, Henan Normal University, Xinxiang, 453007, China
| | - Yinshen Zhao
- College of Life Science, Henan Normal University, Xinxiang, 453007, China
- State Key Laboratory Cultivation Base for Cell Differentiation Regulation, Henan Normal University, Xinxiang, 453007, China
| | - Yuqi Wu
- College of Life Science, Henan Normal University, Xinxiang, 453007, China
- State Key Laboratory Cultivation Base for Cell Differentiation Regulation, Henan Normal University, Xinxiang, 453007, China
| | - Yuqi Zhang
- College of Life Science, Henan Normal University, Xinxiang, 453007, China
- State Key Laboratory Cultivation Base for Cell Differentiation Regulation, Henan Normal University, Xinxiang, 453007, China
| | - Ruoyan Wang
- College of Life Science, Henan Normal University, Xinxiang, 453007, China
- State Key Laboratory Cultivation Base for Cell Differentiation Regulation, Henan Normal University, Xinxiang, 453007, China
| | - Wan Liu
- College of Life Science, Henan Normal University, Xinxiang, 453007, China
- State Key Laboratory Cultivation Base for Cell Differentiation Regulation, Henan Normal University, Xinxiang, 453007, China
| | - Chaoyang Zhang
- College of Life Science, Henan Normal University, Xinxiang, 453007, China
- State Key Laboratory Cultivation Base for Cell Differentiation Regulation, Henan Normal University, Xinxiang, 453007, China
| | - Xianguang Yang
- College of Life Science, Henan Normal University, Xinxiang, 453007, China.
- State Key Laboratory Cultivation Base for Cell Differentiation Regulation, Henan Normal University, Xinxiang, 453007, China.
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11
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Yin M, Storelli F, Unadkat JD. Is the Protein-Mediated Uptake of Drugs by Organic Anion Transporting Polypeptides a Real Phenomenon or an Artifact? Drug Metab Dispos 2022; 50:1132-1141. [PMID: 35351775 DOI: 10.1124/dmd.122.000849] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2022] [Accepted: 03/24/2022] [Indexed: 11/22/2022] Open
Abstract
Plasma proteins or human serum albumin (HSA) have been reported to increase the in vitro intrinsic uptake clearance (CLint,uptake) of drugs by hepatocytes or organic anion transporting polypeptide (OATP)-transfected cell lines. This so-called protein-mediated uptake effect (PMUE) is thought to be due to an interaction between the drug-protein complex and the cell membrane causing an increase in the unbound drug concentration at the cell surface, resulting in an increase in the apparent CLint,uptake of the drug. To determine if the PMUE on OATP-mediated drug uptake is an artifact or a real phenomenon, we determined the effect of 1%, 2%, and 5% HSA on OATP1B1-mediated [human embryonic kidney (HEK)293 transfected cells] and passive CLint,uptake (mock HEK293 cells) on a cocktail of five statins. In addition, we determined the non-specific binding (NSB) of the statin-HSA complex to the cells/labware. The increase in uptake of atorvastatin, fluvastatin, and rosuvastatin in the presence of HSA was completely explained by the extent of NSB of the statin-HSA complex, indicating that the PMUE for these statins is an artifact. In contrast, this was not the case for OATP1B1-mediated uptake of pitavastatin and passive uptake of cerivastatin, suggesting that the PMUE is a real phenomenon for these drugs. Additionally, the PMUE on OATP1B1-mediated uptake of pitavastatin was confirmed by a decrease in its unbound IC50 in the presence of 5% HSA versus Hank's balanced salt solution buffer (HBSS). These data question the utility of routinely including plasma proteins or HSA in uptake experiments and the previous findings on PMUE on OATP-mediated drug uptake. SIGNIFICANCE STATEMENT: Here we report, for the first time, that the protein-mediated uptake effect (PMUE) on organic anion transporting polypeptide (OATP)-transported drugs could be an artifact of the non-specific binding (NSB) of the drug-albumin complex to cells/labware. Future experiments on PMUE must take into consideration such NSB. In addition, mechanisms other than PMUE need to be explored to explain the underprediction of in vivo OATP-mediated hepatic drug clearance from in vitro uptake studies.
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Affiliation(s)
- Mengyue Yin
- Department of Pharmaceutics, University of Washington, Seattle, Washington
| | - Flavia Storelli
- Department of Pharmaceutics, University of Washington, Seattle, Washington
| | - Jashvant D Unadkat
- Department of Pharmaceutics, University of Washington, Seattle, Washington
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12
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Consensus Gene Co-Expression Network Analysis Identifies Novel Genes Associated with Severity of Fibrotic Lung Disease. Int J Mol Sci 2022; 23:ijms23105447. [PMID: 35628257 PMCID: PMC9141193 DOI: 10.3390/ijms23105447] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2022] [Revised: 05/07/2022] [Accepted: 05/10/2022] [Indexed: 01/27/2023] Open
Abstract
Idiopathic pulmonary fibrosis (IPF) is a severe fibrotic lung disease characterized by irreversible scarring of the lung parenchyma leading to dyspnea, progressive decline in lung function, and respiratory failure. We analyzed lung transcriptomic data from independent IPF cohorts using weighted gene co-expression network analysis (WGCNA) to identify gene modules based on their preservation status in these cohorts. The consensus gene modules were characterized by leveraging existing clinical and molecular data such as lung function, biological processes, pathways, and lung cell types. From a total of 32 consensus gene modules identified, two modules were found to be significantly correlated with the disease, lung function, and preserved in other IPF datasets. The upregulated gene module was enriched for extracellular matrix, collagen metabolic process, and BMP signaling while the downregulated module consisted of genes associated with tube morphogenesis, blood vessel development, and cell migration. Using a combination of connectivity-based and trait-based significance measures, we identified and prioritized 103 "hub" genes (including 25 secretory candidate biomarkers) by their similarity to known IPF genetic markers. Our validation studies demonstrate the dysregulated expression of CRABP2, a retinol-binding protein, in multiple lung cells of IPF, and its correlation with the decline in lung function.
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13
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Nhieu J, Lin YL, Wei LN. CRABP1 in Non-Canonical Activities of Retinoic Acid in Health and Diseases. Nutrients 2022; 14:nu14071528. [PMID: 35406141 PMCID: PMC9003107 DOI: 10.3390/nu14071528] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2022] [Revised: 04/01/2022] [Accepted: 04/03/2022] [Indexed: 12/30/2022] Open
Abstract
In this review, we discuss the emerging role of Cellular Retinoic Acid Binding Protein 1 (CRABP1) as a mediator of non-canonical activities of retinoic acid (RA) and relevance to human diseases. We first discuss the role of CRABP1 in regulating MAPK activities and its implication in stem cell proliferation, cancers, adipocyte health, and neuro-immune regulation. We then discuss an additional role of CRABP1 in regulating CaMKII activities, and its implication in heart and motor neuron diseases. Through molecular and genetic studies of Crabp1 knockout (CKO) mouse and culture models, it is established that CRABP1 forms complexes with specific signaling molecules to function as RA-regulated signalsomes in a cell context-dependent manner. Gene expression data and CRABP1 gene single nucleotide polymorphisms (SNPs) of human cancer, neurodegeneration, and immune disease patients implicate the potential association of abnormality in CRABP1 with human diseases. Finally, therapeutic strategies for managing certain human diseases by targeting CRABP1 are discussed.
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Affiliation(s)
| | | | - Li-Na Wei
- Correspondence: ; Tel.: +1-612-6259-402
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14
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Everts HB, Silva KA, Schmidt AN, Opalenik S, Duncan FJ, King LE, Sundberg JP, Ong DE. Estrogen regulates the expression of retinoic acid synthesis enzymes and binding proteins in mouse skin. Nutr Res 2021; 94:10-24. [PMID: 34571215 PMCID: PMC8845065 DOI: 10.1016/j.nutres.2021.08.002] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2021] [Revised: 08/17/2021] [Accepted: 08/17/2021] [Indexed: 11/21/2022]
Abstract
Topical 17-beta-estradiol (E2) regulates the hair cycle, hair shaft differentiation, and sebum production. Vitamin A also regulates sebum production. Vitamin A metabolism proteins localized to the pilosebaceous unit (PSU; hair follicle and sebaceous gland); and were regulated by E2 in other tissues. This study tests the hypothesis that E2 also regulates vitamin A metabolism in the PSU. First, aromatase and estrogen receptors localized to similar sites as retinoid metabolism proteins during mid-anagen. Next, female and male wax stripped C57BL/6J mice were topically treated with E2, the estrogen receptor antagonist ICI 182,780 (ICI), letrozole, E2 plus letrozole, or vehicle control (acetone) during mid-anagen. E2 or one of its inhibitors regulated most of the vitamin A metabolism genes and proteins examined in a sex-dependent manner. Most components were higher in females and reduced with ICI in females. ICI reductions occurred in the premedulla, sebaceous gland, and epidermis. Reduced E2 also reduced RA receptors in the sebaceous gland and bulge in females. However, reduced E2 increased the number of retinal dehydrogenase 2 positive hair follicle associated dermal dendritic cells in males. These results suggest that estrogen regulates vitamin A metabolism in the skin. Interactions between E2 and vitamin A have implications in acne treatment, hair loss, and skin immunity.
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Affiliation(s)
- Helen B Everts
- Department of Nutrition and Food Sciences, Texas Woman's University, Denton, TX, USA; Department of Nutrition, The Ohio State University, Columbus, OH, USA; Department of Biochemistry, Vanderbilt University Medical Center, Nashville, TN, USA.
| | | | - Adriana N Schmidt
- Department of Dermatology, Vanderbilt University Medical Center, Nashville, TN, USA
| | - Susan Opalenik
- Department of Dermatology, Vanderbilt University Medical Center, Nashville, TN, USA
| | - F Jason Duncan
- Department of Nutrition, The Ohio State University, Columbus, OH, USA
| | - Lloyd E King
- Department of Dermatology, Vanderbilt University Medical Center, Nashville, TN, USA
| | - John P Sundberg
- The Jackson Laboratory, Bar Harbor, ME, USA; Department of Dermatology, Vanderbilt University Medical Center, Nashville, TN, USA
| | - David E Ong
- Department of Biochemistry, Vanderbilt University Medical Center, Nashville, TN, USA
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15
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Cellular retinoid-binding proteins transfer retinoids to human cytochrome P450 27C1 for desaturation. J Biol Chem 2021; 297:101142. [PMID: 34480899 PMCID: PMC8511960 DOI: 10.1016/j.jbc.2021.101142] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2021] [Revised: 08/25/2021] [Accepted: 08/26/2021] [Indexed: 11/23/2022] Open
Abstract
Cytochrome P450 27C1 (P450 27C1) is a retinoid desaturase expressed in the skin that catalyzes the formation of 3,4-dehydroretinoids from all-trans retinoids. Within the skin, retinoids are important regulators of proliferation and differentiation. In vivo, retinoids are bound to cellular retinol-binding proteins (CRBPs) and cellular retinoic acid–binding proteins (CRABPs). Interaction with these binding proteins is a defining characteristic of physiologically relevant enzymes in retinoid metabolism. Previous studies that characterized the catalytic activity of human P450 27C1 utilized a reconstituted in vitro system with free retinoids. However, it was unknown whether P450 27C1 could directly interact with holo-retinoid-binding proteins to receive all-trans retinoid substrates. To assess this, steady-state kinetic assays were conducted with free all-trans retinoids and holo-CRBP-1, holo-CRABP-1, and holo-CRABP-2. For holo-CRBP-1 and holo-CRABP-2, the kcat/Km values either decreased 5-fold or were equal to the respective free retinoid values. The kcat/Km value for holo-CRABP-1, however, decreased ∼65-fold in comparison with reactions with free all-trans retinoic acid. These results suggest that P450 27C1 directly accepts all-trans retinol and retinaldehyde from CRBP-1 and all-trans retinoic acid from CRABP-2, but not from CRABP-1. A difference in substrate channeling between CRABP-1 and CRABP-2 was also supported by isotope dilution experiments. Analysis of retinoid transfer from holo-CRABPs to P450 27C1 suggests that the decrease in kcat observed in steady-state kinetic assays is due to retinoid transfer becoming rate-limiting in the P450 27C1 catalytic cycle. Overall, these results illustrate that, like the CYP26 enzymes involved in retinoic acid metabolism, P450 27C1 interacts with cellular retinoid-binding proteins.
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16
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Sadgrove NJ, Oblong JE, Simmonds MSJ. Inspired by vitamin A for anti‐ageing: Searching for plant‐derived functional retinoid analogues. SKIN HEALTH AND DISEASE 2021; 1:e36. [PMID: 35663133 PMCID: PMC9060083 DOI: 10.1002/ski2.36] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/19/2020] [Revised: 03/21/2021] [Accepted: 04/02/2021] [Indexed: 11/11/2022]
Affiliation(s)
- N. J. Sadgrove
- Jodrell Science Laboratory Royal Botanic Gardens, Kew Richmond UK
| | - J. E. Oblong
- Mason Business Center The Procter & Gamble Company Mason Ohio USA
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17
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Retinoic acid-responsive CD8 effector T cells are selectively increased in IL-23-rich tissue in gastrointestinal GVHD. Blood 2021; 137:702-717. [PMID: 32905596 DOI: 10.1182/blood.2020005170] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2020] [Accepted: 08/25/2020] [Indexed: 01/12/2023] Open
Abstract
Gastrointestinal (GI) graft-versus-host disease (GVHD) is a major barrier in allogeneic hematopoietic stem cell transplantation (allo-HSCT). The metabolite retinoic acid (RA) potentiates GI-GVHD in mice via alloreactive T cells expressing the RA receptor-α (RARα), but the role of RA-responsive cells in human GI-GVHD remains undefined. Therefore, we used conventional and novel sequential immunostaining and flow cytometry to scrutinize RA-responsive T cells in tissues and blood of patients who had received allo-HSCT and to characterize the impact of RA on human T-cell alloresponses. Expression of RARα by human mononuclear cells was increased after exposure to RA. RARαhi mononuclear cells were increased in GI-GVHD tissue, contained more cellular RA-binding proteins, localized with tissue damage, and correlated with GVHD severity and mortality. By using a targeted candidate protein approach, we predicted the phenotype of RA-responsive T cells in the context of increased microenvironmental interleukin-23 (IL-23). Sequential immunostaining confirmed the presence of a population of RARαhi CD8 T cells with the predicted phenotype that coexpressed the effector T-cell transcription factor T-bet and the IL-23-specific receptor (IL-23R). These cells were increased in GI- but not skin-GVHD tissues and were also selectively expanded in the blood of patients with GI-GVHD. Finally, functional approaches demonstrated that RA predominantly increased alloreactive GI-tropic RARαhi CD8 effector T cells, including cells with the phenotype identified in vivo. IL-23-rich conditions potentiated this effect by selectively increasing β7 integrin expression on CD8 effector T cells and reducing CD4 T cells with a regulatory cell phenotype. In summary, we have identified a population of RA-responsive effector T cells with a distinctive phenotype that is selectively expanded in human GI-GVHD and that represents a potential new therapeutic target.
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Zhao H, Zhu X, Luo Y, Liu S, Wu W, Zhang L, Zhu J. LINC01816 promotes the migration, invasion and epithelial‑mesenchymal transition of thyroid carcinoma cells by sponging miR‑34c‑5p and regulating CRABP2 expression levels. Oncol Rep 2021; 45:81. [PMID: 33786631 PMCID: PMC8025121 DOI: 10.3892/or.2021.8032] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2020] [Accepted: 02/01/2021] [Indexed: 02/05/2023] Open
Abstract
Thyroid carcinoma (THCA) is a common type of endocrine system cancer and its current clinical treatment method is surgical resection. Long non-coding RNAs (lncRNAs) have been revealed to serve important roles in a variety of complex human diseases. Therefore, determining the association between lncRNAs and diseases may provide novel insight into disease-related lncRNAs, with the aim of improving disease treatments and diagnoses. Long intergenic non-protein coding RNA 1816 (LINC01816) was identified to be associated with the survival of patients with colorectal cancer using the IDHI-MIRW method. The present study aimed to investigate the role and molecular mechanism of LINC01816 in THCA. Analysis of datasets from The Cancer Genome Atlas database revealed that the upregulation of LINC01816 expression levels was associated with a variety of cancer types. Reverse transcription-quantitative PCR analysis demonstrated that compared with the normal thyroid tissues, the expression levels of LINC01816 were upregulated in THCA tissues. The results of wound healing and Transwell assays, and western blotting demonstrated that the overexpression of LINC01816 could strengthen the invasive and migratory abilities of THCA cells and enhance epithelial-mesenchymal transition progression. Analysis using the starBase website and dual-luciferase reporter assays identified that microRNA (miR)-34c-5p was a target of LINC01816. The overexpression of miR-34c-5p could inhibit the invasive and migratory abilities of THCA cells, in addition to inhibiting the cellular retinoic acid binding protein 2 (CRABP2) overexpression-induced effects on invasion, migration and EMT processes. In conclusion, the findings of the present study indicated that LINC01816 may be capable of sponging miR-34c-5p to upregulate CRABP2 expression levels, which subsequently promoted the invasion, migration and EMT of THCA cells. Therefore, targeting the LINC01816/miR-34c-5p/CRABP2 pathway may be an effective therapeutic approach for patients with THCA.
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Affiliation(s)
- Hongyuan Zhao
- Department of Thyroid and Parathyroid Surgery Center, West China Hospital, Sichuan University, Chengdu, Sichuan 610000, P.R. China
| | - Xiaofeng Zhu
- Department of Thyroid and Breast Surgery, Affiliated Hospital of Zunyi Medical University, Zunyi, Guizhou 510515, P.R. China
| | - Yi Luo
- Department of Thyroid and Breast Surgery, Affiliated Hospital of Zunyi Medical University, Zunyi, Guizhou 510515, P.R. China
| | - Shengshan Liu
- Department of Thyroid and Breast Surgery, Affiliated Hospital of Zunyi Medical University, Zunyi, Guizhou 510515, P.R. China
| | - Wenshuang Wu
- Department of Thyroid and Parathyroid Surgery Center, West China Hospital, Sichuan University, Chengdu, Sichuan 610000, P.R. China
| | - Lingyun Zhang
- Department of Thyroid and Parathyroid Surgery Center, West China Hospital, Sichuan University, Chengdu, Sichuan 610000, P.R. China
| | - Jingqiang Zhu
- Department of Thyroid and Parathyroid Surgery Center, West China Hospital, Sichuan University, Chengdu, Sichuan 610000, P.R. China
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19
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García-Padilla C, Lozano-Velasco E, López-Sánchez C, Garcia-Martínez V, Aranega A, Franco D. Non-Coding RNAs in Retinoic Acid as Differentiation and Disease Drivers. Noncoding RNA 2021; 7:ncrna7010013. [PMID: 33671241 PMCID: PMC8005990 DOI: 10.3390/ncrna7010013] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2021] [Revised: 02/14/2021] [Accepted: 02/15/2021] [Indexed: 12/12/2022] Open
Abstract
All-trans retinoic acid (RA) is the most active metabolite of vitamin A. Several studies have described a pivotal role for RA signalling in different biological processes such as cell growth and differentiation, embryonic development and organogenesis. Since RA signalling is highly dose-dependent, a fine-tuning regulatory mechanism is required. Thus, RA signalling deregulation has a major impact, both in development and disease, related in many cases to oncogenic processes. In this review, we focus on the impact of ncRNA post-transcriptional regulatory mechanisms, especially those of microRNAs and lncRNAs, in RA signalling pathways during differentiation and disease.
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Affiliation(s)
- Carlos García-Padilla
- Department of Experimental Biology, University of Jaen, 23071 Jaen, Spain; (C.G.-P.); (E.L.-V.); (A.A.)
- Department of Human Anatomy and Embryology, University of Extremadura, 06006 Badajoz, Spain; (C.L.-S.); (V.G.-M.)
- Institute of Molecular Pathology Biomarkers, University of Extremadura, 06006 Badajoz, Spain
| | - Estefanía Lozano-Velasco
- Department of Experimental Biology, University of Jaen, 23071 Jaen, Spain; (C.G.-P.); (E.L.-V.); (A.A.)
- Fundación Medina, 18016 Granada, Spain
| | - Carmen López-Sánchez
- Department of Human Anatomy and Embryology, University of Extremadura, 06006 Badajoz, Spain; (C.L.-S.); (V.G.-M.)
- Institute of Molecular Pathology Biomarkers, University of Extremadura, 06006 Badajoz, Spain
| | - Virginio Garcia-Martínez
- Department of Human Anatomy and Embryology, University of Extremadura, 06006 Badajoz, Spain; (C.L.-S.); (V.G.-M.)
- Institute of Molecular Pathology Biomarkers, University of Extremadura, 06006 Badajoz, Spain
| | - Amelia Aranega
- Department of Experimental Biology, University of Jaen, 23071 Jaen, Spain; (C.G.-P.); (E.L.-V.); (A.A.)
- Fundación Medina, 18016 Granada, Spain
| | - Diego Franco
- Department of Experimental Biology, University of Jaen, 23071 Jaen, Spain; (C.G.-P.); (E.L.-V.); (A.A.)
- Fundación Medina, 18016 Granada, Spain
- Correspondence:
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20
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Ma Z, Ji Y, Yu Y, Liang D. Specific non-genetic IAP-based protein erasers (SNIPERs) as a potential therapeutic strategy. Eur J Med Chem 2021; 216:113247. [PMID: 33652355 DOI: 10.1016/j.ejmech.2021.113247] [Citation(s) in RCA: 35] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2020] [Revised: 01/13/2021] [Accepted: 01/25/2021] [Indexed: 12/29/2022]
Abstract
As a newly emerged technology, PROTAC (proteolysis targeting chimera) is a promising therapeutic strategy for varieties of diseases. Unlike small molecule inhibitors, PROTACs catalytically induce target proteins degradation, including currently "undruggable" target proteins. In addition, PROTACs can be a potentially successful strategy to overcome drug resistance. IAPs can inhibit apoptosis by inhibiting caspase, and also exhibits the activity of E3 ubiquitin ligase. Specific and nongenetic IAP-based protein erasers (SNIPERs) are hybrid molecules that designed based on IAPs, and used to degrade the target proteins closely associated with diseases. Their structures consist of three parts, including target protein ligand, E3 ligase ligand and the linker between them. SNIPERs (PROTACs) degrade diseases-associated proteins through human inherent ubiquitin-proteasome system. So far, many SNIPERs have been developed to treat diseases that difficult to handle by traditional methods, such as radiotherapy, chemotherapy and small molecule inhibitors, and showed promising prospects in application. In this paper, the recent advances of SNIPERs were summarized, and the chances and challenges associated with this area were also highlighted.
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Affiliation(s)
- Zonghui Ma
- Jiang Su Key Laboratory of Drug Design and Optimization, China Pharmaceutical University, Tongjiaxiang 24, Nanjing, 210009, China; Department of Medicinal Chemistry, China Pharmaceutical University, Tongjiaxiang 24, Nanjing, 210009, China.
| | - Yu Ji
- Jiang Su Key Laboratory of Drug Design and Optimization, China Pharmaceutical University, Tongjiaxiang 24, Nanjing, 210009, China; Department of Medicinal Chemistry, China Pharmaceutical University, Tongjiaxiang 24, Nanjing, 210009, China
| | - Yifan Yu
- Jiang Su Key Laboratory of Drug Design and Optimization, China Pharmaceutical University, Tongjiaxiang 24, Nanjing, 210009, China; Department of Medicinal Chemistry, China Pharmaceutical University, Tongjiaxiang 24, Nanjing, 210009, China
| | - Dailin Liang
- Jiang Su Key Laboratory of Drug Design and Optimization, China Pharmaceutical University, Tongjiaxiang 24, Nanjing, 210009, China; Department of Medicinal Chemistry, China Pharmaceutical University, Tongjiaxiang 24, Nanjing, 210009, China
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21
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Khanehzad M, Abbaszadeh R, Holakuyee M, Modarressi MH, Nourashrafeddin SM. FSH regulates RA signaling to commit spermatogonia into differentiation pathway and meiosis. Reprod Biol Endocrinol 2021; 19:4. [PMID: 33407539 PMCID: PMC7789255 DOI: 10.1186/s12958-020-00686-w] [Citation(s) in RCA: 34] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/27/2020] [Accepted: 12/17/2020] [Indexed: 02/08/2023] Open
Abstract
BACKGROUND Spermatogenesis is a complex process that is controlled by interactions between germ cells and somatic cells. The commitment of undifferentiated spermatogonia to differentiating spermatogonia and normal spermatogenesis requires the action of gonadotropins. Additionally, numerous studies revealed the role of retinoic acid signaling in induction of germ cell differentiation and meiosis entry. MAIN TEXT Recent studies have shown that expression of several RA signaling molecules including Rdh10, Aldh1a2, Crabp1/2 are influenced by changes in gonadotropin levels. Components of signaling pathways that are regulated by FSH signaling such as GDNF, Sohlh1/2, c-Kit, DMRT, BMP4 and NRGs along with transcription factors that are important for proliferation and differentiation of spermatogonia are also affected by retinoic acid signaling. CONCLUSION According to all studies that demonstrate the interface between FSH and RA signaling, we suggest that RA may trigger spermatogonia differentiation and initiation of meiosis through regulation by FSH signaling in testis. Therefore, to the best of our knowledge, this is the first time that the correlation between FSH and RA signaling in spermatogenesis is highlighted.
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Affiliation(s)
- Maryam Khanehzad
- Department of Anatomy, Faculty of Medicine, Tehran University of Medical Sciences, Tehran, Iran
| | - Roya Abbaszadeh
- Department of Molecular Medicine, School of Advanced Technologies in Medicine, Tehran University of Medical Sciences, Tehran, Iran
| | | | | | - Seyed Mehdi Nourashrafeddin
- Department of Obstetrics, Gynecology and Reproductive Sciences, School of Medicine, University of Pittsburgh, Pittsburgh, USA.
- School of Advanced Technologies in Medicine, Tehran University of Medical Sciences, Tehran, Iran.
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22
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Everts HB, Akuailou EN. Retinoids in Cutaneous Squamous Cell Carcinoma. Nutrients 2021; 13:E153. [PMID: 33466372 PMCID: PMC7824907 DOI: 10.3390/nu13010153] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2020] [Revised: 12/31/2020] [Accepted: 12/31/2020] [Indexed: 02/07/2023] Open
Abstract
Animal studies as early as the 1920s suggested that vitamin A deficiency leads to squamous cell metaplasia in numerous epithelial tissues including the skin. However, humans usually die from vitamin A deficiency before cancers have time to develop. A recent long-term cohort study found that high dietary vitamin A reduced the risk of cutaneous squamous cell carcinoma (cSCC). cSCC is a form of nonmelanoma skin cancer that primarily occurs from excess exposure to ultraviolet light B (UVB). These cancers are expensive to treat and can lead to metastasis and death. Oral synthetic retinoids prevent the reoccurrence of cSCC, but side effects limit their use in chemoprevention. Several proteins involved in vitamin A metabolism and signaling are altered in cSCC, which may lead to retinoid resistance. The expression of vitamin A metabolism proteins may also have prognostic value. This article reviews what is known about natural and synthetic retinoids and their metabolism in cSCC.
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Affiliation(s)
- Helen B Everts
- Department of Nutrition and Food Sciences, Texas Woman's University, Denton, TX 76209, USA
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23
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Davidi D, Schechter M, Elhadi SA, Matatov A, Nathanson L, Sharon R. α-Synuclein Translocates to the Nucleus to Activate Retinoic-Acid-Dependent Gene Transcription. iScience 2020; 23:100910. [PMID: 32120069 PMCID: PMC7052517 DOI: 10.1016/j.isci.2020.100910] [Citation(s) in RCA: 36] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2019] [Revised: 01/06/2020] [Accepted: 02/10/2020] [Indexed: 12/14/2022] Open
Abstract
α-Synuclein (α-Syn) protein is implicated in the pathogenesis of Parkinson disease (PD). It is primarily cytosolic and interacts with cell membranes. α-Syn also occurs in the nucleus. Here we investigated the mechanisms involved in nuclear translocation of α-Syn. We analyzed alterations in gene expression following induced α-Syn expression in SH-SY5Y cells. Analysis of upstream regulators pointed at alterations in transcription activity of retinoic acid receptors (RARs) and additional nuclear receptors. We show that α-Syn binds RA and translocates to the nucleus to selectively enhance gene transcription. Nuclear translocation of α-Syn is regulated by calreticulin and is leptomycin-B independent. Importantly, nuclear translocation of α-Syn following RA treatment enhances its toxicity in cultured neurons and the expression levels of PD-associated genes, including ATPase cation transporting 13A2 (ATP13A2) and PTEN-induced kinase1 (PINK1). The results link a physiological role for α-Syn in the regulation of RA-mediated gene transcription and its toxicity in the synucleinopathies.
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Affiliation(s)
- Dana Davidi
- Biochemistry and Molecular Biology, IMRIC, The Hebrew University-Hadassah Medical School, Ein Kerem, 9112001 Jerusalem, Israel
| | - Meir Schechter
- Biochemistry and Molecular Biology, IMRIC, The Hebrew University-Hadassah Medical School, Ein Kerem, 9112001 Jerusalem, Israel
| | - Suaad Abd Elhadi
- Biochemistry and Molecular Biology, IMRIC, The Hebrew University-Hadassah Medical School, Ein Kerem, 9112001 Jerusalem, Israel
| | - Adar Matatov
- Biochemistry and Molecular Biology, IMRIC, The Hebrew University-Hadassah Medical School, Ein Kerem, 9112001 Jerusalem, Israel
| | - Lubov Nathanson
- Institute for Neuro Immune Medicine, Dr. Kiran C. Patel College of Osteopathic Medicine, Nova Southeastern University, Fort Lauderdale, FL, USA
| | - Ronit Sharon
- Biochemistry and Molecular Biology, IMRIC, The Hebrew University-Hadassah Medical School, Ein Kerem, 9112001 Jerusalem, Israel.
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Abstract
Vitamin A and derivatives, the natural retinoids, underpin signaling pathways of cellular differentiation, and are key chromophores in vision. These functions depend on transfer across membranes, and carrier proteins to shuttle retinoids to specific cell compartments. Natural retinoids, ultimately derived from plant carotenoids by metabolism to all-trans retinol, are lipophilic and consist of a cyclohexenyl (β-ionone) moiety linked to a polyene chain. This structure constrains the orientation of retinoids within lipid membranes. Cis-trans isomerization at double bonds of the polyene chain and s-cis/s-trans rotational isomerization at single bonds define the functional dichotomy of retinoids (signaling/vision) and specificities of interactions with specific carrier proteins and receptors. Metabolism of all-trans retinol to 11-cis retinal, transfer to photoreceptors, and removal and recycling of all-trans retinal generated by photoreceptor irradiation, is the key process underlying vision. All-trans retinol transferred into cells is metabolized to all-trans retinoic acid and shuttled to the cell nucleus to regulate gene expression controlling organ, tissue and cell differentiation, and cellular homeostasis. Research methods need to address the potential of photoisomerization in vitro to confound research results, and data should be interpreted in the context of membrane-association properties of retinoids and physiological concentrations in vivo. Despite a century of research, there are many fundamental questions of retinoid cellular biochemistry and molecular biology still to be answered. Computational modeling techniques will have an important role for understanding the nuances of vitamin A signaling and function.
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Affiliation(s)
- Chris P F Redfern
- School of Natural & Environmental Sciences, Newcastle University, Newcastle upon Tyne, United Kingdom.
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25
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Costantini L, Molinari R, Farinon B, Merendino N. Retinoic Acids in the Treatment of Most Lethal Solid Cancers. J Clin Med 2020; 9:E360. [PMID: 32012980 PMCID: PMC7073976 DOI: 10.3390/jcm9020360] [Citation(s) in RCA: 46] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2020] [Revised: 01/21/2020] [Accepted: 01/24/2020] [Indexed: 12/14/2022] Open
Abstract
Although the use of oral administration of pharmacological all-trans retinoic acid (ATRA) concentration in acute promyelocytic leukaemia (APL) patients was approved for over 20 years and used as standard therapy still to date, the same use in solid cancers is still controversial. In the present review the literature about the top five lethal solid cancers (lung, stomach, liver, breast, and colon cancer), as defined by The Global Cancer Observatory of World Health Organization, and retinoic acids (ATRA, 9-cis retinoic acid, and 13-cis retinoic acid, RA) was compared. The action of retinoic acids in inhibiting the cell proliferation was found in several cell pathways and compartments: from membrane and cytoplasmic signaling, to metabolic enzymes, to gene expression. However, in parallel in the most aggressive phenotypes several escape routes have evolved conferring retinoic acids-resistance. The comparison between different solid cancer types pointed out that for some cancer types several information are still lacking. Moreover, even though some pathways and escape routes are the same between the cancer types, sometimes they can differently respond to retinoic acid therapy, so that generalization cannot be made. Further studies on molecular pathways are needed to perform combinatorial trials that allow overcoming retinoic acids resistance.
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Affiliation(s)
- Lara Costantini
- Department of Ecological and Biological Sciences (DEB), Tuscia University, Largo dell’Università snc, 01100 Viterbo, Italy
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26
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Itoh Y. Drug Discovery Researches on Modulators of Lysine-Modifying Enzymes Based on Strategic Chemistry Approaches. Chem Pharm Bull (Tokyo) 2020; 68:34-45. [DOI: 10.1248/cpb.c19-00741] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Affiliation(s)
- Yukihiro Itoh
- Graduate School of Medical Science, Kyoto Prefectural University of Medicine
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27
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Jiao X, Liu R, Huang J, Lu L, Li Z, Xu L, Li E. Cellular Retinoic-Acid Binding Protein 2 in Solid Tumor. Curr Protein Pept Sci 2020; 21:507-516. [PMID: 32013828 DOI: 10.2174/1389203721666200203150721] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2019] [Revised: 01/16/2020] [Accepted: 01/20/2020] [Indexed: 02/05/2023]
Abstract
The retinoic acid (RA) signaling pathway is crucial for many biological processes. The RA transporter, Cellular Retinoic-Acid Binding Protein 2 (CRABP2), is abnormally expressed in various tumor types. CRABP2 presents significant effects on tumorous behaviors and functions, including cell proliferation, apoptosis, invasion, migration, metastasis, and angiogenesis. The tumorigenesis mechanism of CRABP2, as both suppressor and promotor, is complicated, therefore, there remains the need for further investigation. Elucidating the regulating mechanisms in a specific stage of the tumor could facilitate CRABP2 to be a biomarker in cancer diagnosis and prognosis. Besides, clarifying the pathways of CRABP2 in cancer development will contribute to the gene-targeted therapy. In this review, we summarized the expression, distribution, and mechanism of CRABP2 in solid tumors. Illuminating the CRABP2 signaling pathway may benefit understanding the retinoid signaling pathway, providing a useful biomarker for future clinical trials.
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MESH Headings
- Apoptosis
- Biological Transport
- Biomarkers, Tumor/genetics
- Biomarkers, Tumor/metabolism
- Cell Line, Tumor
- Cell Movement
- Cell Proliferation
- Fatty Acid-Binding Proteins/genetics
- Fatty Acid-Binding Proteins/metabolism
- Gene Expression Regulation, Neoplastic
- Humans
- Lymphatic Metastasis
- Neoplasm Staging
- Neoplasms/blood supply
- Neoplasms/diagnosis
- Neoplasms/genetics
- Neoplasms/metabolism
- Neovascularization, Pathologic/diagnosis
- Neovascularization, Pathologic/genetics
- Neovascularization, Pathologic/metabolism
- Neovascularization, Pathologic/pathology
- Receptors, Retinoic Acid/genetics
- Receptors, Retinoic Acid/metabolism
- Signal Transduction
- Tretinoin/metabolism
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Affiliation(s)
- Xiaoyang Jiao
- Cell biology and genetics department, Shantou University Medical College Shantou, Guangdong, China
| | - Rang Liu
- The Key Laboratory of Molecular Biology for High Cancer Incidence Coastal Chaoshan Area, Shantou University Medical College Shantou, Guangdong, China
| | - Jiali Huang
- The Key Laboratory of Molecular Biology for High Cancer Incidence Coastal Chaoshan Area, Shantou University Medical College Shantou, Guangdong, China
| | - Lichun Lu
- The Key Laboratory of Molecular Biology for High Cancer Incidence Coastal Chaoshan Area, Shantou University Medical College Shantou, Guangdong, China
| | - Zibo Li
- The Key Laboratory of Molecular Biology for High Cancer Incidence Coastal Chaoshan Area, Shantou University Medical College Shantou, Guangdong, China
| | - Liyan Xu
- The Key Laboratory of Molecular Biology for High Cancer Incidence Coastal Chaoshan Area, Shantou University Medical College Shantou, Guangdong, China
| | - Enmin Li
- Department of Biochemistry and Molecular Biology, Shantou University Medical College, Shantou, Guangdong, China
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28
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Draut H, Liebenstein T, Begemann G. New Insights into the Control of Cell Fate Choices and Differentiation by Retinoic Acid in Cranial, Axial and Caudal Structures. Biomolecules 2019; 9:E860. [PMID: 31835881 PMCID: PMC6995509 DOI: 10.3390/biom9120860] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2019] [Revised: 12/06/2019] [Accepted: 12/09/2019] [Indexed: 12/13/2022] Open
Abstract
Retinoic acid (RA) signaling is an important regulator of chordate development. RA binds to nuclear RA receptors that control the transcriptional activity of target genes. Controlled local degradation of RA by enzymes of the Cyp26a gene family contributes to the establishment of transient RA signaling gradients that control patterning, cell fate decisions and differentiation. Several steps in the lineage leading to the induction and differentiation of neuromesodermal progenitors and bone-producing osteogenic cells are controlled by RA. Changes to RA signaling activity have effects on the formation of the bones of the skull, the vertebrae and the development of teeth and regeneration of fin rays in fish. This review focuses on recent advances in these areas, with predominant emphasis on zebrafish, and highlights previously unknown roles for RA signaling in developmental processes.
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29
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Lixa C, Clarkson MW, Iqbal A, Moon TM, Almeida FCL, Peti W, Pinheiro AS. Retinoic Acid Binding Leads to CRABP2 Rigidification and Dimerization. Biochemistry 2019; 58:4183-4194. [DOI: 10.1021/acs.biochem.9b00672] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Carolina Lixa
- Department of Biochemistry, Institute of Chemistry, Federal University of Rio de Janeiro, Rio de Janeiro, RJ 21941909, Brazil
| | - Michael W. Clarkson
- Department of Chemistry and Biochemistry, College of Medicine, University of Arizona, Tucson, Arizona 85721, United States
| | - Anwar Iqbal
- National Center for Nuclear Magnetic Resonance Jiri Jonas, Institute of Medical Biochemistry, Federal University of Rio de Janeiro, Rio de Janeiro, RJ 21941902, Brazil
| | - Thomas M. Moon
- Department of Chemistry and Biochemistry, College of Medicine, University of Arizona, Tucson, Arizona 85721, United States
| | - Fabio C. L. Almeida
- National Center for Nuclear Magnetic Resonance Jiri Jonas, Institute of Medical Biochemistry, Federal University of Rio de Janeiro, Rio de Janeiro, RJ 21941902, Brazil
| | - Wolfgang Peti
- Department of Chemistry and Biochemistry, College of Medicine, University of Arizona, Tucson, Arizona 85721, United States
| | - Anderson S. Pinheiro
- Department of Biochemistry, Institute of Chemistry, Federal University of Rio de Janeiro, Rio de Janeiro, RJ 21941909, Brazil
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30
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Sanusi RS. Outcome of Combined Neoadjuvant Chemotherapy and Vitamin A in Advanced Cervical Carcinoma: A Randomized Double-Blind Clinical Trial. Asian Pac J Cancer Prev 2019; 20:2213-2218. [PMID: 31350987 PMCID: PMC6745224 DOI: 10.31557/apjcp.2019.20.7.2213] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2018] [Accepted: 07/22/2019] [Indexed: 12/14/2022] Open
Abstract
Background: The latest World Health Organization (WHO) inquiry on the epidemiology of cervical cancers indicate there are approximately 528,000 new cases per year, ranking fourth after breast, colorectal and lung cancer. The validity of neoadjuvant chemotherapy (NAC) alone in advanced cervical cancer is still being debated. NAC induces tumor shrinkage prior to pursuing surgery. NAC also has the benefit of sterilizing the lymph nodes and parametria, thereby lowering the need for adjuvant therapy after surgery. This research aims to determine the impact on the treatment of advanced cervical carcinoma with NAC, with the additional provision of Vitamin A during treatment to assess the factors that could affect the outcome of clinical treatment. Methodology: The research methodology and design of this study is a randomized double-blind clinical trial to compare the effects of treatment with NAC and treatment with NAC + Vitamin A, in advanced cervical carcinoma. Both study groups received treatments consisting of a regime of cisplatin and paclitaxel. The study was conducted at the General Hospital of Dr. Mohammad Hoesin. The total number of patients recruited for the trial was 30 with 15 patients per treatment arm. One group received NAC consisting of cisplatin and paclitaxel and the remaining 15 patients received NAC + Vitamin A. Results: The addition of Vitamin A was found to be much better in influencing the clinical response in the treatment of advanced cervical carcinoma, although this was not statistically significant. However, a larger sample size with the reported proportion of higher positive outcome for NAC + Vitamin A may be statistically significant. Conclusion: Based on the results, Vitamin A supplementation in the treatment of advanced cervical carcinoma with neoadjuvant chemotherapy may play a crucial role in the treatment of cervical carcinoma.
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Affiliation(s)
- Rizal Sanif Sanusi
- Division of Gynecologic Oncology, Department of Obstetrics and Gynecology, General Hospital of Dr.Mohammad Hoessin, University of Sriwijaya, Palembang, Sumatra, Indonesia.
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31
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Bang BR, Li M, Tsai KN, Aoyagi H, Lee SA, Machida K, Aizaki H, Jung JU, Ou JHJ, Saito T. Regulation of Hepatitis C Virus Infection by Cellular Retinoic Acid Binding Proteins through the Modulation of Lipid Droplet Abundance. J Virol 2019; 93:e02302-18. [PMID: 30728260 PMCID: PMC6450116 DOI: 10.1128/jvi.02302-18] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2019] [Accepted: 01/31/2019] [Indexed: 02/08/2023] Open
Abstract
Retinoid (vitamin A) is an essential diet constituent that governs a broad range of biological processes. Its biologically active metabolite, all-trans retinoic acid (ATRA), exhibits a potent antiviral property by enhancing both innate and adaptive antiviral immunity against a variety of viral pathogens, such as, but not limited to, HIV, respiratory syncytial virus (RSV), herpes simplex virus (HSV), and measles. Even though the hepatocyte is highly enriched with retinoid and its metabolite ATRA, it supports the establishment of efficient hepatitis C virus (HCV) replication. Here, we demonstrate the hepatocyte-specific cell-intrinsic mechanism by which ATRA exerts either a proviral or antiviral effect, depending on how it engages cellular retinoic acid binding proteins (CRABPs). We found that the engagement of CRABP1 by ATRA potently supported viral infection by promoting the accumulation of lipid droplets (LDs), which robustly enhanced the formation of a replication complex on the LD-associated endoplasmic reticulum (ER) membrane. In contrast, ATRA binding to CRABP2 potently inhibited HCV via suppression of LD accumulation. However, this antiviral effect of CRABP2 was abrogated due to the functional and quantitative predominance of CRABP1 in the hepatocytes. In summary, our study demonstrates that CRABPs serve as an on-off switch that modulates the efficiency of the HCV life cycle and elucidates how HCV evades the antiviral properties of ATRA via the exploitation of CRABP1 functionality.IMPORTANCE ATRA, a biologically active metabolite of vitamin A, exerts pleiotropic biological effects, including the activation of both innate and adaptive immunity, thereby serving as a potent antimicrobial compound against numerous viral pathogens. Despite the enrichment of hepatocytes with vitamin A, HCV still establishes an efficient viral life cycle. Here, we discovered that the hepatocellular response to ATRA creates either a proviral or an antiviral environment depending on its engagement with CRABP1 or -2, respectively. CRABP1 supports the robust replication of HCV, while CRABP2 potently inhibits the efficiency of viral replication. Our biochemical, genetic, and microscopic analyses reveal that the pro- and antiviral effects of CRABPs are mediated by modulation of LD abundance, where HCV establishes the platform for viral replication and assembly on the LD-associated ER membrane. This study uncovered a cell-intrinsic mechanism by which HCV exploits the proviral function of CRABP1 to establish an efficient viral life cycle.
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Affiliation(s)
- Bo-Ram Bang
- Department of Medicine, Division of Gastrointestinal and Liver Diseases, Keck School of Medicine, University of Southern California, Los Angeles, California, USA
| | - Meng Li
- Bioinformatics Service, Norris Medical Library, University of Southern California, Los Angeles, California, USA
| | - Kuen-Nan Tsai
- Department of Molecular Microbiology and Immunology, Keck School of Medicine, University of Southern California, Los Angeles, California, USA
| | - Haruyo Aoyagi
- Department of Virology II, National Institute of Infectious Diseases, Tokyo, Japan
| | - Shin-Ae Lee
- Department of Molecular Microbiology and Immunology, Keck School of Medicine, University of Southern California, Los Angeles, California, USA
| | - Keigo Machida
- Department of Molecular Microbiology and Immunology, Keck School of Medicine, University of Southern California, Los Angeles, California, USA
- Southern California Research Center for ALPD and Cirrhosis, Keck School of Medicine, University of Southern California, Los Angeles, California, USA
| | - Hideki Aizaki
- Department of Virology II, National Institute of Infectious Diseases, Tokyo, Japan
| | - Jae U Jung
- Department of Molecular Microbiology and Immunology, Keck School of Medicine, University of Southern California, Los Angeles, California, USA
| | - Jing-Hsiung James Ou
- Department of Molecular Microbiology and Immunology, Keck School of Medicine, University of Southern California, Los Angeles, California, USA
| | - Takeshi Saito
- Department of Medicine, Division of Gastrointestinal and Liver Diseases, Keck School of Medicine, University of Southern California, Los Angeles, California, USA
- Department of Molecular Microbiology and Immunology, Keck School of Medicine, University of Southern California, Los Angeles, California, USA
- Department of Pathology, Keck School of Medicine, University of Southern California, Los Angeles, California, USA
- USC Research Center for Liver Diseases, Keck School of Medicine, University of Southern California, Los Angeles, California, USA
- Southern California Research Center for ALPD and Cirrhosis, Keck School of Medicine, University of Southern California, Los Angeles, California, USA
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32
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Tomlinson CWE, Chisholm DR, Valentine R, Whiting A, Pohl E. Novel Fluorescence Competition Assay for Retinoic Acid Binding Proteins. ACS Med Chem Lett 2018; 9:1297-1300. [PMID: 30613343 PMCID: PMC6295855 DOI: 10.1021/acsmedchemlett.8b00420] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2018] [Accepted: 11/09/2018] [Indexed: 01/16/2023] Open
Abstract
![]()
Vitamin
A derived retinoid compounds have multiple, powerful roles
in the cellular growth and development cycle and, as a result, have
attracted significant attention from both academic and pharmaceutical
research in developing and characterizing synthetic retinoid analogues.
Simplifying the hit development workflow for retinoid signaling will
improve options available for tackling related pathologies, including
tumor growth and neurodegeneration. Here, we present a novel assay
that employs an intrinsically fluorescent synthetic retinoid, DC271,
which allows direct measurement of the binding of nonlabeled compounds
to relevant proteins. The method allows for straightforward initial
measurement of binding using existing compound libraries and is followed
by calculation of binding constants using a dilution series of plausible
hits. The ease of use, high throughput format, and measurement of
both qualitative and quantitative binding offer a new direction for
retinoid-related pharmacological development.
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Affiliation(s)
- Charles W. E. Tomlinson
- Department of Chemistry, Durham University, Science Laboratories, South Road, Durham, DH1 3LE, U.K
| | - David R. Chisholm
- Department of Chemistry, Durham University, Science Laboratories, South Road, Durham, DH1 3LE, U.K
| | - Roy Valentine
- High Force Research Ltd., Bowburn North Industrial Estate, Bowburn, Durham, DH6 5PF, U.K
| | - Andrew Whiting
- Department of Chemistry, Durham University, Science Laboratories, South Road, Durham, DH1 3LE, U.K
| | - Ehmke Pohl
- Department of Chemistry, Durham University, Science Laboratories, South Road, Durham, DH1 3LE, U.K
- Department of Biosciences, Durham University, Science Laboratories, South Road, Durham, DH1 3LE, U.K
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33
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Wang B, Nie W, Fu X, de Avila JM, Ma Y, Zhu MJ, Maquivar M, Parish SM, Busboom JR, Nelson ML, Du M. Neonatal vitamin A injection promotes cattle muscle growth and increases oxidative muscle fibers. J Anim Sci Biotechnol 2018; 9:82. [PMID: 30459947 PMCID: PMC6236944 DOI: 10.1186/s40104-018-0296-3] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2018] [Accepted: 09/26/2018] [Indexed: 01/12/2023] Open
Abstract
Background Vitamin A and its metabolite, retinoic acid (RA), are important regulators of cell differentiation and organ morphogenesis. Its impact on beef cattle muscle growth remains undefined. Method Angus steer calves were administrated with 0 (control) or 150,000 IU vitamin A (retinyl palmitate in glycerol, i.m.) per calf at birth and 1 month of age. At 2 months of age, a biopsy of the Biceps femoris muscle was obtained to analyze the immediate effects of vitamin A injection on myogenic capacity of muscle cells. The resulting steers were harvested at 14 months of age. Results Vitamin A administration increased cattle growth at 2 months. At 2 months of age, Vitamin A increased PAX7 positive satellite cells and the expression of myogenic marker genes including PAX7, MYF5, MYOD and MYOG. Muscle derived mononuclear cells were further isolated and induced myogenesis in vitro. More myotubes and a higher degree of myogenesis was observed in vitamin A groups. Consistently, vitamin A increased Latissimus dorsi (LD) muscle fiber size at harvest. In addition, vitamin A increased the ratio of oxidative type I and type IIA fibers and reduced the glycolic type IIX fibers. Furthermore, we found that RA, a key bioactive metabolite of vitamin A, activated PPARGC1A promoter, which explains the upregulated expression of PPARGC1A in skeletal muscle. Conclusion Vitamin A administration to neonatal calves enhanced postnatal muscle growth by promoting myogenesis and increasing satellite cell density, accompanied with a shift to oxidative muscle fibers.
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Affiliation(s)
- Bo Wang
- 1State Key Lab of Animal Nutrition, College of Animal Science and Technology, China Agricultural University, Beijing, 100193 People's Republic of China.,2Department of Animal Sciences, Washington State University, Pullman, WA 99164 USA
| | - Wei Nie
- 1State Key Lab of Animal Nutrition, College of Animal Science and Technology, China Agricultural University, Beijing, 100193 People's Republic of China.,2Department of Animal Sciences, Washington State University, Pullman, WA 99164 USA
| | - Xing Fu
- 2Department of Animal Sciences, Washington State University, Pullman, WA 99164 USA.,3Department of Animal Sciences, Louisiana State University, Baton Rouge, LA 70803 USA
| | - Jeanene M de Avila
- 2Department of Animal Sciences, Washington State University, Pullman, WA 99164 USA
| | - Yannan Ma
- 2Department of Animal Sciences, Washington State University, Pullman, WA 99164 USA.,4College of Animal Science and Technology, Gansu Agricultural University, Lanzhou, 730070 Gansu People's Republic of China
| | - Mei-Jun Zhu
- 5School of Food Science, Washington State University, Pullman, WA 99164 USA
| | - Martin Maquivar
- 2Department of Animal Sciences, Washington State University, Pullman, WA 99164 USA
| | - Steven M Parish
- 6College of Veterinary Science, Washington State University, Pullman, WA 99164 USA
| | - Jan R Busboom
- 2Department of Animal Sciences, Washington State University, Pullman, WA 99164 USA
| | - Mark L Nelson
- 2Department of Animal Sciences, Washington State University, Pullman, WA 99164 USA
| | - Min Du
- 2Department of Animal Sciences, Washington State University, Pullman, WA 99164 USA
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34
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Martín‐Gago P, Olsen CA. Arylfluorosulfate-Based Electrophiles for Covalent Protein Labeling: A New Addition to the Arsenal. Angew Chem Int Ed Engl 2018; 58:957-966. [PMID: 30024079 PMCID: PMC6518939 DOI: 10.1002/anie.201806037] [Citation(s) in RCA: 98] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2018] [Revised: 07/18/2018] [Indexed: 01/15/2023]
Abstract
Selective covalent modification of a targeted protein is a powerful tool in chemical biology and drug discovery, with applications ranging from identification and characterization of proteins and their functions to the development of targeted covalent inhibitors. Most covalent ligands contain an affinity motif and an electrophilic warhead that reacts with a nucleophilic residue of the targeted protein. Because the electrophilic warhead is prone to react and modify off‐target nucleophiles, its reactivity should be balanced carefully to maximize target selectivity. Arylfluorosulfates have recently emerged as latent electrophiles for selective labeling of context‐specific tyrosine and lysine residues in protein pockets. Here, we review the recent but intense introduction of arylfluorosulfates into the arsenal of available warheads for selective covalent modification of proteins. We highlight the untapped potential of this functional group for use in chemical biology and drug discovery.
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Affiliation(s)
- Pablo Martín‐Gago
- Center for Biopharmaceuticals &, Department of Drug Design and PharmacologyUniversity of CopenhagenUniversitetsparken 22100CopenhagenDenmark
| | - Christian A. Olsen
- Center for Biopharmaceuticals &, Department of Drug Design and PharmacologyUniversity of CopenhagenUniversitetsparken 22100CopenhagenDenmark
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35
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Martín‐Gago P, Olsen CA. Arylfluorsulfat‐basierte Elektrophile für die kovalente Proteinmarkierung. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201806037] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Pablo Martín‐Gago
- Center for Biopharmaceuticals &, Department of Drug Design and PharmacologyUniversität Kopenhagen Universitetsparken 2 2100 Kopenhagen Dänemark
| | - Christian A. Olsen
- Center for Biopharmaceuticals &, Department of Drug Design and PharmacologyUniversität Kopenhagen Universitetsparken 2 2100 Kopenhagen Dänemark
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36
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Ghaffari H, Petzold LR. Identification of influential proteins in the classical retinoic acid signaling pathway. Theor Biol Med Model 2018; 15:16. [PMID: 30322383 PMCID: PMC6190658 DOI: 10.1186/s12976-018-0088-7] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2018] [Accepted: 08/07/2018] [Indexed: 11/29/2022] Open
Abstract
Background In the classical pathway of retinoic acid (RA) mediated gene transcription, RA binds to a nuclear hormone receptor dimer composed of retinoic acid receptor (RAR) and retinoid X receptor (RXR), to induce the expression of its downstream target genes. In addition to nuclear receptors, there are other intracellular RA binding proteins such as cellular retinoic acid binding proteins (CRABP1 and CRABP2) and cytochrome P450 (CYP) enzymes, whose contributions to the RA signaling pathway have not been fully understood. The objective of this study was to compare the significance of various RA binding receptors, i.e. CRABP1, CRABP2, CYP and RAR in the RA signaling pathway. In this regard, we developed a mathematical model of the RA pathway, which is one of the few models, if not the only one, that includes all main intracellular RA binding receptors. We then performed a global sensitivity analysis (GSA) to investigate the contribution of the RA receptors to RA-induced mRNA production, when the cells were treated with a wide range of RA levels, from physiological to pharmacological concentrations. Results Our results show that CRABP2 and RAR are the most and the least important proteins, respectively, in controlling the model performance at physiological concentrations of RA (1–10 nM). However, at higher concentrations of RA, CYP and RAR are the most sensitive parameters of the system. Furthermore, we found that depending on the concentrations of all RA binding proteins, the rate of metabolism of RA can either change or remain constant following RA therapy. The cellular levels of CRABP1 are more important than that of CRABP2 in controlling RA metabolite formation at pharmacological conditions (RA = 0.1–1 μM). Finally, our results indicate a significant negative correlation between total mRNA production and total RA metabolite formation at pharmacological levels of RA. Conclusions Our simulations indicate that the significance of the RA binding proteins in the RA pathway of gene expression strongly depends on intracellular concentration of RA. This study not only can explain why various cell types respond to RA therapy differently, but also can potentially help develop pharmacological methods to increase the efficacy of the drug. Electronic supplementary material The online version of this article (10.1186/s12976-018-0088-7) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Hamed Ghaffari
- Department of Mechanical Engineering, University of California Santa Barbara, Santa Barbara, CA, 93106, USA.
| | - Linda R Petzold
- Department of Mechanical Engineering, University of California Santa Barbara, Santa Barbara, CA, 93106, USA.,Department of Computer Science, University of California Santa Barbara, Santa Barbara, CA, 93106, USA
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CARM1 (PRMT4) Acts as a Transcriptional Coactivator during Retinoic Acid-Induced Embryonic Stem Cell Differentiation. J Mol Biol 2018; 430:4168-4182. [PMID: 30153436 PMCID: PMC6186513 DOI: 10.1016/j.jmb.2018.08.014] [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] [Received: 06/22/2018] [Revised: 07/25/2018] [Accepted: 08/12/2018] [Indexed: 02/07/2023]
Abstract
Activation of the retinoic acid (RA) signaling pathway is important for controlling embryonic stem cell differentiation and development. Modulation of this pathway occurs through the recruitment of different epigenetic regulators at the retinoic acid receptors (RARs) located at RA-responsive elements and/or RA-responsive regions of RA-regulated genes. Coactivator-associated arginine methyltransferase 1 (CARM1, PRMT4) is a protein arginine methyltransferase that also functions as a transcriptional coactivator. Previous studies highlight CARM1's importance in the differentiation of different cell types. We address CARM1 function during RA-induced differentiation of murine embryonic stem cells (mESCs) using shRNA lentiviral transduction and CRISPR/Cas9 technology to deplete CARM1 in mESCs. We identify CARM1 as a novel transcriptional coactivator required for the RA-associated decrease in Rex1 (Zfp42) and for the RA induction of a subset of RA-regulated genes, including CRABP2 and NR2F1 (Coup-TF1). Furthermore, CARM1 is required for mESCs to differentiate into extraembryonic endoderm in response to RA. We next characterize the epigenetic mechanisms that contribute to RA-induced transcriptional activation of CRABP2 and NR2F1 in mESCs and show for the first time that CARM1 is required for this activation. Collectively, our data demonstrate that CARM1 is required for transcriptional activation of a subset of RA target genes, and we uncover changes in the recruitment of Suz12 and the epigenetic H3K27me3 and H3K27ac marks at gene regulatory regions for CRABP2 and NR2F1 during RA-induced differentiation.
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38
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Saba E, Irfan M, Jeong D, Ameer K, Lee YY, Park CK, Hong SB, Rhee MH. Mediation of antiinflammatory effects of Rg3-enriched red ginseng extract from Korean Red Ginseng via retinoid X receptor α-peroxisome-proliferating receptor γ nuclear receptors. J Ginseng Res 2018; 43:442-451. [PMID: 31308816 PMCID: PMC6606843 DOI: 10.1016/j.jgr.2018.06.005] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2018] [Revised: 05/31/2018] [Accepted: 06/26/2018] [Indexed: 11/19/2022] Open
Abstract
Background Ginseng has a wide range of beneficial effects on health, such as the mitigation of minor and major inflammatory diseases, cancer, and cardiovascular diseases. There are abundant data regarding the health-enhancing properties of whole ginseng extracts and single ginsenosides; however, no study to date has determined the receptors that mediate the effects of ginseng extracts. In this study, for the first time, we explored whether the antiinflammatory effects of Rg3-enriched red ginseng extract (Rg3-RGE) are mediated by retinoid X receptor α–peroxisome-proliferating receptor γ (RXRα-PPARγ) heterodimer nuclear receptors. Methods Nitric oxide assay, 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazoliumbromide assay, quantitative reverse transcription polymerase chain reaction, nuclear hormone receptor–binding assay, and molecular docking analyses were used for this study. Results Rg3-RGE exerted antiinflammatory effects via nuclear receptor heterodimers between RXRα and PPARγ agonists and antagonists. Conclusion These findings indicate that Rg3-RGE can be considered a potent antiinflammatory agent, and these effects are likely mediated by the nuclear receptor RXRα-PPARγ heterodimer.
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Affiliation(s)
- Evelyn Saba
- Department of Physiology and Cell Signaling, College of Veterinary Medicine, Kyungpook National University, Daegu, Republic of Korea
| | - Muhammad Irfan
- Department of Physiology and Cell Signaling, College of Veterinary Medicine, Kyungpook National University, Daegu, Republic of Korea
| | - Dahye Jeong
- Department of Physiology and Cell Signaling, College of Veterinary Medicine, Kyungpook National University, Daegu, Republic of Korea
| | - Kashif Ameer
- Division of Food Technology, Biotechnology and Agrochemistry, College of Agriculture & Life Science, Chonnam National University, Gwangju, Republic of Korea
| | - Yuan Yee Lee
- Department of Physiology and Cell Signaling, College of Veterinary Medicine, Kyungpook National University, Daegu, Republic of Korea
| | - Chae-Kyu Park
- Laboratory of Cosmetic Research, R&D Headquarters, Korean Ginseng Cooperation, Daejeon, Republic of Korea
| | - Seung-Bok Hong
- Department of Clinical Laboratory Science, Chungbuk Health & Science University, Cheongju, Republic of Korea
| | - Man Hee Rhee
- Department of Physiology and Cell Signaling, College of Veterinary Medicine, Kyungpook National University, Daegu, Republic of Korea
- Corresponding author: Department of Physiology and Cell Signaling, College of Veterinary Medicine, Kyungpook National University, Daegu 41566, Republic of Korea.
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39
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Kim DJ, Kim WJ, Lim M, Hong Y, Lee SJ, Hong SH, Heo J, Lee HY, Han SS. Plasma CRABP2 as a Novel Biomarker in Patients with Non-Small Cell Lung Cancer. J Korean Med Sci 2018; 33:e178. [PMID: 29930489 PMCID: PMC6010740 DOI: 10.3346/jkms.2018.33.e178] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/22/2018] [Accepted: 04/20/2018] [Indexed: 12/21/2022] Open
Abstract
BACKGROUND Lung cancer is the most common cause of cancer-related mortality worldwide. We previously reported the identification of a new genetic marker, cellular retinoic acid binding protein 2 (CRABP2), in lung cancer tissues. The aim of this study was to assess plasma levels of CRABP2 from patients with non-small cell lung cancer (NSCLC). METHODS Blood samples that were collected from 122 patients with NSCLC between September 2009 and September 2013 were selected for the analysis, along with samples from age- (± 5 years), sex-, and cigarette smoking history (± 10 pack-years [PY])-matched controls from the Korea Biobank Network. The control specimens were from patients who were without malignancies or pulmonary diseases. We measured plasma levels of CRABP2 using commercially available enzyme-linked immunosorbent assay kits. RESULTS The mean age of the NSCLC patients was 71.8 ± 8.9 years, and the median cigarette smoking history was 32 PY (range, 0-150 PY). Plasma CRABP2 levels were significantly higher in patients with NSCLC than in the matched controls (37.63 ± 28.71 ng/mL vs. 24.09 ± 21.09 ng/mL, P < 0.001). Higher plasma CRABP2 levels were also correlated with lower survival rates in NSCLC patients (P = 0.014). CONCLUSION Plasma CRABP2 levels might be a novel diagnostic and prognostic marker in NSCLC.
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Affiliation(s)
- Do Jun Kim
- Department of Internal Medicine, Kangwon National University Hospital, Chuncheon, Korea
| | - Woo Jin Kim
- Department of Internal Medicine, Kangwon National University School of Medicine, Chuncheon, Korea
| | - Myoungnam Lim
- Data Analytics Center, Kangwon National University, Chuncheon, Korea
| | - Yoonki Hong
- Department of Internal Medicine, Kangwon National University School of Medicine, Chuncheon, Korea
| | - Seung-Joon Lee
- Department of Internal Medicine, Kangwon National University School of Medicine, Chuncheon, Korea
| | - Seok-Ho Hong
- Department of Internal Medicine, Kangwon National University School of Medicine, Chuncheon, Korea
| | - Jeongwon Heo
- Department of Internal Medicine, Kangwon National University Hospital, Chuncheon, Korea
| | - Hui-Young Lee
- Department of Internal Medicine, Kangwon National University School of Medicine, Chuncheon, Korea
| | - Seon-Sook Han
- Department of Internal Medicine, Kangwon National University School of Medicine, Chuncheon, Korea
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40
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Itoh Y. Chemical Protein Degradation Approach and its Application to Epigenetic Targets. CHEM REC 2018; 18:1681-1700. [PMID: 29893461 DOI: 10.1002/tcr.201800032] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2018] [Accepted: 05/24/2018] [Indexed: 12/17/2022]
Abstract
In addition to traditional drugs, such as enzyme inhibitors, receptor agonists/antagonists, and protein-protein interaction inhibitors as well as genetic technology, such as RNA interference and the CRISPR/Cas9 system, protein knockdown approaches using proteolysis-targeting chimeras (PROTACs) have attracted much attention. PROTACs, which induce selective degradation of their target protein via the ubiquitin-proteasome system, are useful for the down-regulation of various proteins, including disease-related proteins and epigenetic proteins. Recent reports have shown that chemical protein knockdown is possible not only in cells, but also in vivo and this approach is expected to be used as the therapeutic strategy for several diseases. Thus, this approach may be a significant technique to complement traditional drugs and genetic ablation and will be more widely used for drug discovery and chemical biology studies in the future. In this personal account, a history of chemical protein knockdown is introduced, and its features, recent progress in the epigenetics field, and future outlooks are discussed.
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Affiliation(s)
- Yukihiro Itoh
- Department of Chemistry, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, 1-5 Shimogamohangi-cho, Sakyo-ku, Kyoto, 606-0823, Japan
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41
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Mosquera N, Rodriguez-Trillo A, Mera-Varela A, Gonzalez A, Conde C. Uncovering Cellular retinoic acid-binding protein 2 as a potential target for rheumatoid arthritis synovial hyperplasia. Sci Rep 2018; 8:8731. [PMID: 29880835 PMCID: PMC5992205 DOI: 10.1038/s41598-018-26027-x] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2017] [Accepted: 05/02/2018] [Indexed: 12/19/2022] Open
Abstract
Rheumatoid arthritis (RA) is a systemic autoimmune disease including synovitis and synovial hyperplasia that contribute to joint destruction. Pivotal pathogenic mechanisms in this process are the dysregulated proliferation and apoptosis of fibroblast-like synoviocytes (FLS). Unfortunately, the mechanisms of FLS dysregulation are not completely elucidated. Here, we explored a new hypothesis based in the potent anti-proliferative and pro-apoptotic activity of retinoids in some types of cancer. Specifically, we investigated the role of retinoids and of the retinoic acid binding proteins, CRABP2 and FABP5, on the proliferation and apoptosis of FLS from RA by adding all-trans retinoic acid (ATRA) or silencing CRABP2 and FABP5. We showed an unconventional behaviour of RA FLS, which were relatively insensitive to ATRA. In effect, ATRA increased the resistance to apoptosis despite the high CRABP2/FABP5 ratio of RA FLS; and CRABP2 suppression sensitized RA FLS to Fas-induced apoptosis. This latter effect was associated with changes in expression of kinases, ASK1 up-regulation and ERK down-regulation, and increased phosphorylation of JNK. In addition, the potentiation of FLS apoptosis by CRABP2 silencing persisted in the presence of pro-inflammatory mediators, TNF e IL1β. Therefore, the results point to CRABP2 as a potential target to decrease synovial hyperplasia in RA.
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Affiliation(s)
- Nerea Mosquera
- Laboratorio de Reumatología Experimental y Observacional, y Servicio de Reumatología, Instituto de Investigacion Sanitaria de Santiago (IDIS), Hospital Clínico Universitario de Santiago de Compostela (CHUS), SERGAS. Travesía da Choupana s/n, Santiago de Compostela, 15706, Spain
| | - Angela Rodriguez-Trillo
- Laboratorio de Reumatología Experimental y Observacional, y Servicio de Reumatología, Instituto de Investigacion Sanitaria de Santiago (IDIS), Hospital Clínico Universitario de Santiago de Compostela (CHUS), SERGAS. Travesía da Choupana s/n, Santiago de Compostela, 15706, Spain
| | - Antonio Mera-Varela
- Servicio de Reumatología, Instituto de Investigacion Sanitaria de Santiago (IDIS), Hospital Clínico Universitario de Santiago de Compostela (CHUS), SERGAS. Travesía da Choupana s/n, Santiago de Compostela, 15706, Spain
| | - Antonio Gonzalez
- Laboratorio de Reumatología Experimental y Observacional, y Servicio de Reumatología, Instituto de Investigacion Sanitaria de Santiago (IDIS), Hospital Clínico Universitario de Santiago de Compostela (CHUS), SERGAS. Travesía da Choupana s/n, Santiago de Compostela, 15706, Spain
| | - Carmen Conde
- Laboratorio de Reumatología Experimental y Observacional, y Servicio de Reumatología, Instituto de Investigacion Sanitaria de Santiago (IDIS), Hospital Clínico Universitario de Santiago de Compostela (CHUS), SERGAS. Travesía da Choupana s/n, Santiago de Compostela, 15706, Spain.
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42
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Haffez H, Khatib T, McCaffery P, Przyborski S, Redfern C, Whiting A. Neurogenesis in Response to Synthetic Retinoids at Different Temporal Scales. Mol Neurobiol 2018; 55:1942-1950. [PMID: 28244006 PMCID: PMC5840238 DOI: 10.1007/s12035-017-0440-7] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2016] [Accepted: 02/03/2017] [Indexed: 11/25/2022]
Abstract
All-trans retinoic acid (ATRA) plays key roles in neurogenesis mediated by retinoic acid receptors (RARs). RARs are important targets for the therapeutic regulation of neurogenesis but effective drug development depends on modelling-based strategies to design high-specificity ligands in combination with good biological assays to discriminate between target-specificity and off-target effects. Using neuronal differentiation as a model, the aim of this study was to test the hypothesis that responses across different temporal scales and assay platforms can be used as comparable measures of retinoid activity. In biological assays based on cell phenotype or behaviour, two structurally similar synthetic retinoids, differing in RAR affinity and specificity, retained their relative activities across different temporal scales. In contrast, assays based on the transcriptional activation of specific genes in their normal genomic context were less concordant with biological assays. Gene-induction assays for retinoid activity as modulators of neurogenesis require careful interpretation in the light of variation in ligand-receptor affinity, receptor expression and gene function. A better characterization of neuronal phenotypes and their regulation by retinoids is badly needed as a framework for understanding how to regulate neuronal development.
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Affiliation(s)
- Hesham Haffez
- Department of Chemistry, Centre for Sustainable Chemical Processes, Durham University, South Road, Durham, UK
- Department of Biosciences, Durham University, South Road, Durham, DH1 3LE, UK
- Northern Institute for Cancer Research, Medical School, Newcastle University, Newcastle upon Tyne, NE2 4HH, UK
- Department of Biochemistry and Molecular Biology, Pharmacy College Helwan University, Cairo, Egypt
| | - Thabat Khatib
- School of Medicine, Medical Sciences and Nutrition, Institute of Medical Sciences, Foresterhill, Aberdeen, AB25 2ZD, UK
| | - Peter McCaffery
- School of Medicine, Medical Sciences and Nutrition, Institute of Medical Sciences, Foresterhill, Aberdeen, AB25 2ZD, UK
| | - Stefan Przyborski
- Department of Biosciences, Durham University, South Road, Durham, DH1 3LE, UK
| | - Christopher Redfern
- Northern Institute for Cancer Research, Medical School, Newcastle University, Newcastle upon Tyne, NE2 4HH, UK.
| | - Andrew Whiting
- Department of Chemistry, Centre for Sustainable Chemical Processes, Durham University, South Road, Durham, UK
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Abstract
Multiple binding and transport proteins facilitate many aspects of retinoid biology through effects on retinoid transport, cellular uptake, metabolism, and nuclear delivery. These include the serum retinol binding protein sRBP (aka Rbp4), the plasma membrane sRBP receptor Stra6, and the intracellular retinoid binding-proteins such as cellular retinol-binding proteins (CRBP) and cellular retinoic acid binding-proteins (CRABP). sRBP transports the highly lipophilic retinol through an aqueous medium. The major intracellular retinol-binding protein, CRBP1, likely enhances efficient retinoid use by providing a sink to facilitate retinol uptake from sRBP through the plasma membrane or via Stra6, delivering retinol or retinal to select enzymes that generate retinyl esters or retinoic acid, and protecting retinol/retinal from excess catabolism or opportunistic metabolism. Intracellular retinoic acid binding-proteins (CRABP1 and 2, and FABP5) seem to have more diverse functions distinctive to each, such as directing retinoic acid to catabolism, delivering retinoic acid to specific nuclear receptors, and generating non-canonical actions. Gene ablation of intracellular retinoid binding-proteins does not cause embryonic lethality or gross morphological defects. Metabolic and functional defects manifested in knockouts of CRBP1, CRBP2 and CRBP3, however, illustrate their essentiality to health, and in the case of CRBP2, to survival during limited dietary vitamin A. Future studies should continue to address the specific molecular interactions that occur between retinoid binding-proteins and their targets and their precise physiologic contributions to retinoid homeostasis and function.
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Affiliation(s)
- Joseph L Napoli
- Graduate Program in Metabolic Biology, Department of Nutritional Sciences and Toxicology, University of California, 119 Morgan Hall, 94720, Berkeley, CA, USA.
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44
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Woll AW, Quelle FW, Sigmund CD. PPARγ and retinol binding protein 7 form a regulatory hub promoting antioxidant properties of the endothelium. Physiol Genomics 2017; 49:653-658. [PMID: 28916634 DOI: 10.1152/physiolgenomics.00055.2017] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023] Open
Abstract
Peroxisome proliferator-activated receptors (PPARs) are a family of conserved ligand-activated nuclear receptor transcription factors heterogeneously expressed in mammalian tissues. PPARγ is recognized as a master regulator of adipogenesis, fatty acid metabolism, and glucose homeostasis, but genetic evidence also supports the concept that PPARγ regulates the cardiovascular system, particularly vascular function and blood pressure. There is now compelling evidence that the beneficial blood pressure-lowering effects of PPARγ activation are due to its activity in vascular smooth muscle and endothelium, through its modulation of nitric oxide-dependent vasomotor function. Endothelial PPARγ regulates the production and bioavailability of nitric oxide, while PPARγ in the smooth muscle regulates the vasomotor response to nitric oxide. We recently identified retinol binding protein 7 (RBP7) as a PPARγ target gene that is specifically and selectively expressed in the endothelium. In this review, we will discuss the evidence that RBP7 is required to mediate the antioxidant effects of PPARγ and mediate PPARγ target gene selectivity in the endothelium.
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Affiliation(s)
- Addison W Woll
- Department of Pharmacology, Roy J. and Lucille A. Carver College of Medicine, University of Iowa, Iowa City, Iowa.,Interdisciplinary Program in Molecular Medicine, Roy J. and Lucille A. Carver College of Medicine, University of Iowa, Iowa City, Iowa
| | - Frederick W Quelle
- Department of Pharmacology, Roy J. and Lucille A. Carver College of Medicine, University of Iowa, Iowa City, Iowa
| | - Curt D Sigmund
- Department of Pharmacology, Roy J. and Lucille A. Carver College of Medicine, University of Iowa, Iowa City, Iowa; .,UIHC Center for Hypertension Research, Roy J. and Lucille A. Carver College of Medicine, University of Iowa, Iowa City, Iowa; and
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Abstract
The epigenetic phenomena refer to heritable changes in gene expression other than those in the DNA sequence, such as DNA methylation and histone modifications. Major research progress in the last few years has provided further proof that environmental factors, including diet and nutrition, can influence physiologic and pathologic processes through epigenetic alterations, which in turn influence gene expression. This influence is termed nutritional epigenetics, and one prominent example is the regulation of gene transcription by vitamin A through interaction to its nuclear receptor. Vitamin A is critical throughout life. Together with its derivatives, it regulates diverse processes including reproduction, embryogenesis, vision, growth, cellular differentiation and proliferation, maintenance of epithelial cellular integrity and immune function. Here we review the epigenetic role of vitamin A in cancer, stem cells differentiation, proliferation, and immunity. The data presented here show that retinoic acid is a potent agent capable of inducing alterations in epigenetic modifications that produce various effects on the phenotype. Medical benefits of vitamin A as an epigenetic modulator, especially with respect to its chronic use as nutritional supplement, should rely on our further understanding of its epigenetic effects during health and disease, as well as through different generations.
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Affiliation(s)
- Shimrit Bar-El Dadon
- a The Robert H. Smith Faculty of Agricultural, Food, and Nutritional Sciences, The Hebrew University of Jerusalem , Rehovot , Israel
| | - Ram Reifen
- a The Robert H. Smith Faculty of Agricultural, Food, and Nutritional Sciences, The Hebrew University of Jerusalem , Rehovot , Israel
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Zhang HL, Guo B, Yang ZQ, Duan CC, Geng S, Wang K, Yu HF, Yue ZP. ATRA Signaling Regulates the Expression of COL9A1 through BMP2-WNT4-RUNX1 Pathway in Antler Chondrocytes. JOURNAL OF EXPERIMENTAL ZOOLOGY PART B-MOLECULAR AND DEVELOPMENTAL EVOLUTION 2017. [PMID: 28643469 DOI: 10.1002/jez.b.22756] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Although all-trans retinoic acid (ATRA) is involved in the regulation of cartilage growth and development, its regulatory mechanisms remain unknown. Here, we showed that ATRA could induce the expression of COL9A1 in antler chondrocytes. Silencing of cellular retinoic acid binding protein 2 (CRABP2) could impede the ATRA-induced upregulation of COL9A1, whereas overexpression of CRABP2 presented the opposite effect. RARα agonist Am80 induced the expression of COL9A1, whereas treatment with RARα antagonist Ro 41-5253 or RXRα small-interfering RNA (siRNA) caused an obvious blockage of ATRA on COL9A1. In antler chondrocytes, CYP26A1 and CYP26B1 weakened the sensitivity of ATRA to COL9A1. Simultaneously, Bone morphogenetic protein 2 (BMP2) and WNT4 mediated the regulation of ATRA on COL9A1 expression. Knockdown of WNT4 could abrogate the inhibitory effect of BMP2 overexpression on COL9A1. Conversely, constitutive expression of WNT4 reversed the upregulation of COL9A1 elicited by BMP2 siRNA. Together these data indicated that WNT4 might act downstream of BMP2 to mediate the effect of ATRA on COL9A1 expression. Further analysis evidenced that attenuation of runt-related transcription factor 1 (RUNX1) could prevent the stimulation of ATRA on COL9A1 expression, while exogenous rRUNX1 further enhanced this effectiveness. Moreover, RUNX1 might serve as an intermediate to mediate the regulation of BMP2 and WNT4 on COL9A1 expression. Collectively, ATRA signaling might regulate the expression of COL9A1 through BMP2-WNT4-RUNX1 pathway.
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Affiliation(s)
- Hong-Liang Zhang
- College of Veterinary Medicine, Jilin University, Changchun, P.R. China
| | - Bin Guo
- College of Veterinary Medicine, Jilin University, Changchun, P.R. China
| | - Zhan-Qing Yang
- College of Veterinary Medicine, Jilin University, Changchun, P.R. China
| | - Cui-Cui Duan
- Institute of Agro-Food Technology, Jilin Academy of Agricultural Sciences, Changchun, P.R. China
| | - Shuang Geng
- College of Veterinary Medicine, Jilin University, Changchun, P.R. China
| | - Kai Wang
- College of Veterinary Medicine, Jilin University, Changchun, P.R. China
| | - Hai-Fan Yu
- College of Veterinary Medicine, Jilin University, Changchun, P.R. China
| | - Zhan-Peng Yue
- College of Veterinary Medicine, Jilin University, Changchun, P.R. China
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Venkatachalam AB, Parmar MB, Wright JM. Evolution of the duplicated intracellular lipid-binding protein genes of teleost fishes. Mol Genet Genomics 2017; 292:699-727. [PMID: 28389698 DOI: 10.1007/s00438-017-1313-5] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2016] [Accepted: 02/15/2017] [Indexed: 12/18/2022]
Abstract
Increasing organismal complexity during the evolution of life has been attributed to the duplication of genes and entire genomes. More recently, theoretical models have been proposed that postulate the fate of duplicated genes, among them the duplication-degeneration-complementation (DDC) model. In the DDC model, the common fate of a duplicated gene is lost from the genome owing to nonfunctionalization. Duplicated genes are retained in the genome either by subfunctionalization, where the functions of the ancestral gene are sub-divided between the sister duplicate genes, or by neofunctionalization, where one of the duplicate genes acquires a new function. Both processes occur either by loss or gain of regulatory elements in the promoters of duplicated genes. Here, we review the genomic organization, evolution, and transcriptional regulation of the multigene family of intracellular lipid-binding protein (iLBP) genes from teleost fishes. Teleost fishes possess many copies of iLBP genes owing to a whole genome duplication (WGD) early in the teleost fish radiation. Moreover, the retention of duplicated iLBP genes is substantially higher than the retention of all other genes duplicated in the teleost genome. The fatty acid-binding protein genes, a subfamily of the iLBP multigene family in zebrafish, are differentially regulated by peroxisome proliferator-activated receptor (PPAR) isoforms, which may account for the retention of iLBP genes in the zebrafish genome by the process of subfunctionalization of cis-acting regulatory elements in iLBP gene promoters.
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Affiliation(s)
- Ananda B Venkatachalam
- Department of Biology, Dalhousie University, 1355 Oxford Street, PO BOX 15000, Halifax, NS, B3H 4R2, Canada
| | - Manoj B Parmar
- Department of Biology, Dalhousie University, 1355 Oxford Street, PO BOX 15000, Halifax, NS, B3H 4R2, Canada
| | - Jonathan M Wright
- Department of Biology, Dalhousie University, 1355 Oxford Street, PO BOX 15000, Halifax, NS, B3H 4R2, Canada.
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Yin X, Feng H. Roles of AEG-1 in CNS neurons and astrocytes during noncancerous processes. J Neurosci Res 2017; 95:2086-2090. [PMID: 28370184 DOI: 10.1002/jnr.24044] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2016] [Revised: 02/03/2017] [Accepted: 02/03/2017] [Indexed: 11/08/2022]
Affiliation(s)
- Xiang Yin
- Department of Neurology and Neuroscience Center; First Hospital of Jilin University; Changchun People's Republic of China
| | - Honglin Feng
- Department of Neurology; First Affiliated Hospital of Harbin Medical University; Harbin People's Republic of China
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Napoli JL. Cellular retinoid binding-proteins, CRBP, CRABP, FABP5: Effects on retinoid metabolism, function and related diseases. Pharmacol Ther 2017; 173:19-33. [PMID: 28132904 DOI: 10.1016/j.pharmthera.2017.01.004] [Citation(s) in RCA: 184] [Impact Index Per Article: 23.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Cellular binding-proteins (BP), including CRBP1, CRBP2, CRABP1, CRABP2, and FABP5, shepherd the poorly aqueous soluble retinoids during uptake, metabolism and function. Holo-BP promote efficient use of retinol, a scarce but essential nutrient throughout evolution, by sheltering it and its major metabolite all-trans-retinoic acid from adventitious interactions with the cellular milieu, and by imposing specificity of delivery to enzymes, nuclear receptors and other partners. Apo-BP reflect cellular retinoid status and modify activities of retinoid metabolon enzymes, or exert non-canonical actions. High ligand binding affinities and the nature of ligand sequestration necessitate external factors to prompt retinoid release from holo-BP. One or more of cross-linking, kinetics, and colocalization have identified these factors as RDH, RALDH, CYP26, LRAT, RAR and PPARβ/δ. Michaelis-Menten and other kinetic approaches verify that BP channel retinoids to select enzymes and receptors by protein-protein interactions. Function of the BP and enzymes that constitute the retinoid metabolon depends in part on retinoid exchanges unique to specific pairings. The complexity of these exchanges configure retinol metabolism to meet the diverse functions of all-trans-retinoic acid and its ability to foster contrary outcomes in different cell types, such as inducing apoptosis, differentiation or proliferation. Altered BP expression affects retinoid function, for example, by impairing pancreas development resulting in abnormal glucose and energy metabolism, promoting predisposition to breast cancer, and fostering more severe outcomes in prostate cancer, ovarian adenocarcinoma, and glioblastoma. Yet, the extent of BP interactions with retinoid metabolon enzymes and their impact on retinoid physiology remains incompletely understood.
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Affiliation(s)
- Joseph L Napoli
- Department of Nutritional Sciences and Toxicology, University of California, Berkeley, CA 94720, United States.
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Metzler MA, Sandell LL. Enzymatic Metabolism of Vitamin A in Developing Vertebrate Embryos. Nutrients 2016; 8:E812. [PMID: 27983671 PMCID: PMC5188467 DOI: 10.3390/nu8120812] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2016] [Revised: 12/09/2016] [Accepted: 12/13/2016] [Indexed: 12/16/2022] Open
Abstract
Embryonic development is orchestrated by a small number of signaling pathways, one of which is the retinoic acid (RA) signaling pathway. Vitamin A is essential for vertebrate embryonic development because it is the molecular precursor of the essential signaling molecule RA. The level and distribution of RA signaling within a developing embryo must be tightly regulated; too much, or too little, or abnormal distribution, all disrupt embryonic development. Precise regulation of RA signaling during embryogenesis is achieved by proteins involved in vitamin A metabolism, retinoid transport, nuclear signaling, and RA catabolism. The reversible first step in conversion of the precursor vitamin A to the active retinoid RA is mediated by retinol dehydrogenase 10 (RDH10) and dehydrogenase/reductase (SDR family) member 3 (DHRS3), two related membrane-bound proteins that functionally activate each other to mediate the interconversion of retinol and retinal. Alcohol dehydrogenase (ADH) enzymes do not contribute to RA production under normal conditions during embryogenesis. Genes involved in vitamin A metabolism and RA catabolism are expressed in tissue-specific patterns and are subject to feedback regulation. Mutations in genes encoding these proteins disrupt morphogenesis of many systems in a developing embryo. Together these observations demonstrate the importance of vitamin A metabolism in regulating RA signaling during embryonic development in vertebrates.
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Affiliation(s)
- Melissa A Metzler
- Department of Molecular, Cellular and Craniofacial Biology, University of Louisville, Louisville, KY 40201, USA.
| | - Lisa L Sandell
- Department of Molecular, Cellular and Craniofacial Biology, University of Louisville, Louisville, KY 40201, USA.
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