1
|
Zhang J, Cao Y, Ren R, Sui W, Zhang Y, Zhang M, Zhang C. Medium-Dose Formoterol Attenuated Abdominal Aortic Aneurysm Induced by EPO via β2AR/cAMP/SIRT1 Pathway. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2024; 11:e2306232. [PMID: 38353392 PMCID: PMC11022707 DOI: 10.1002/advs.202306232] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/31/2023] [Revised: 12/20/2023] [Indexed: 04/18/2024]
Abstract
Abdominal aortic aneurysm (AAA) is a life-threatening vascular disease but effective drugs for treatment of AAA are still lacking. Recently, erythropoietin (EPO) is reported to induce AAA formation in apolipoprotein-E knock out (ApoE-/-) mice but an effective antagonist is unknown. In this study, formoterol, a β2 adrenergic receptor (β2AR) agonist, is found to be a promising agent for inhibiting AAA. To test this hypothesis, ApoE-/- mice are treated with vehicle, EPO, and EPO plus low-, medium-, and high-dose formoterol, respectively. The incidence of AAA is 0, 55%, 35%,10%, and 55% in these 5 groups, respectively. Mechanistically, senescence of vascular smooth muscle cell (VSMC) is increased by EPO while decreased by medium-dose formoterol both in vivo and in vitro, manifested by the altered expression of senescence biomarkers including phosphorylation of H2AXserine139, senescence-associated β-galactosidase activity, and P21 protein level. In addition, expression of sirtuin 1 (SIRT1) in aorta is decreased in EPO-induced AAA but remarkably elevated by medium-dose formoterol. Knockdown of β2AR and blockage of cyclic adenosine monophosphate (cAMP) attenuate the inhibitory role of formoterol in EPO-induced VSMC senescence. In summary, medium-dose formoterol attenuates EPO-induced AAA via β2AR/cAMP/SIRT1 pathways, which provides a promising medication for the treatment of AAA.
Collapse
Affiliation(s)
- Jianlin Zhang
- National Key Laboratory for Innovation and Transformation of Luobing TheoryThe Key Laboratory of Cardiovascular Remodeling and Function ResearchChinese Ministry of EducationChinese National Health Commission and Chinese Academy of Medical SciencesDepartment of CardiologyQilu Hospital of Shandong UniversityJinanShandong250012China
| | - Yu Cao
- National Key Laboratory for Innovation and Transformation of Luobing TheoryThe Key Laboratory of Cardiovascular Remodeling and Function ResearchChinese Ministry of EducationChinese National Health Commission and Chinese Academy of Medical SciencesDepartment of CardiologyQilu Hospital of Shandong UniversityJinanShandong250012China
| | - Ruiqing Ren
- National Key Laboratory for Innovation and Transformation of Luobing TheoryThe Key Laboratory of Cardiovascular Remodeling and Function ResearchChinese Ministry of EducationChinese National Health Commission and Chinese Academy of Medical SciencesDepartment of CardiologyQilu Hospital of Shandong UniversityJinanShandong250012China
| | - Wenhai Sui
- National Key Laboratory for Innovation and Transformation of Luobing TheoryThe Key Laboratory of Cardiovascular Remodeling and Function ResearchChinese Ministry of EducationChinese National Health Commission and Chinese Academy of Medical SciencesDepartment of CardiologyQilu Hospital of Shandong UniversityJinanShandong250012China
| | - Yun Zhang
- National Key Laboratory for Innovation and Transformation of Luobing TheoryThe Key Laboratory of Cardiovascular Remodeling and Function ResearchChinese Ministry of EducationChinese National Health Commission and Chinese Academy of Medical SciencesDepartment of CardiologyQilu Hospital of Shandong UniversityJinanShandong250012China
- Cardiovascular Disease Research Center of Shandong First Medical UniversityCentral Hospital Affiliated to Shandong First Medical UniversityJinan250013China
| | - Meng Zhang
- National Key Laboratory for Innovation and Transformation of Luobing TheoryThe Key Laboratory of Cardiovascular Remodeling and Function ResearchChinese Ministry of EducationChinese National Health Commission and Chinese Academy of Medical SciencesDepartment of CardiologyQilu Hospital of Shandong UniversityJinanShandong250012China
| | - Cheng Zhang
- National Key Laboratory for Innovation and Transformation of Luobing TheoryThe Key Laboratory of Cardiovascular Remodeling and Function ResearchChinese Ministry of EducationChinese National Health Commission and Chinese Academy of Medical SciencesDepartment of CardiologyQilu Hospital of Shandong UniversityJinanShandong250012China
- Cardiovascular Disease Research Center of Shandong First Medical UniversityCentral Hospital Affiliated to Shandong First Medical UniversityJinan250013China
| |
Collapse
|
2
|
Matsubayashi HT, Mountain J, Takahashi N, Deb Roy A, Yao T, Peterson AF, Saez Gonzalez C, Kawamata I, Inoue T. Non-catalytic role of phosphoinositide 3-kinase in mesenchymal cell migration through non-canonical induction of p85β/AP2-mediated endocytosis. Nat Commun 2024; 15:2612. [PMID: 38521786 PMCID: PMC10960865 DOI: 10.1038/s41467-024-46855-y] [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: 01/11/2023] [Accepted: 03/13/2024] [Indexed: 03/25/2024] Open
Abstract
Class IA phosphoinositide 3-kinase (PI3K) galvanizes fundamental cellular processes such as migration, proliferation, and differentiation. To enable these multifaceted roles, the catalytic subunit p110 utilizes the multi-domain, regulatory subunit p85 through its inter SH2 domain (iSH2). In cell migration, its product PI(3,4,5)P3 generates locomotive activity. While non-catalytic roles are also implicated, underlying mechanisms and their relationship to PI(3,4,5)P3 signaling remain elusive. Here, we report that a disordered region of iSH2 contains AP2 binding motifs which can trigger clathrin and dynamin-mediated endocytosis independent of PI3K catalytic activity. The AP2 binding motif mutants of p85 aberrantly accumulate at focal adhesions and increase both velocity and persistency in fibroblast migration. We thus propose the dual functionality of PI3K in the control of cell motility, catalytic and non-catalytic, arising distinctly from juxtaposed regions within iSH2.
Collapse
Affiliation(s)
- Hideaki T Matsubayashi
- Department of Cell Biology, School of Medicine, Johns Hopkins University, Baltimore, MD, USA.
- Center for Cell Dynamics, Institute of Basic Biomedical Sciences, Johns Hopkins University, Baltimore, MD, USA.
- Frontier Research Institute for Interdisciplinary Sciences, Tohoku University, Tohoku, Japan.
| | - Jack Mountain
- Department of Cell Biology, School of Medicine, Johns Hopkins University, Baltimore, MD, USA
- Center for Cell Dynamics, Institute of Basic Biomedical Sciences, Johns Hopkins University, Baltimore, MD, USA
| | - Nozomi Takahashi
- Frontier Research Institute for Interdisciplinary Sciences, Tohoku University, Tohoku, Japan
| | - Abhijit Deb Roy
- Department of Cell Biology, School of Medicine, Johns Hopkins University, Baltimore, MD, USA
- Center for Cell Dynamics, Institute of Basic Biomedical Sciences, Johns Hopkins University, Baltimore, MD, USA
| | - Tony Yao
- Department of Cell Biology, School of Medicine, Johns Hopkins University, Baltimore, MD, USA
- Center for Cell Dynamics, Institute of Basic Biomedical Sciences, Johns Hopkins University, Baltimore, MD, USA
| | - Amy F Peterson
- Department of Cell Biology, School of Medicine, Johns Hopkins University, Baltimore, MD, USA
- Center for Cell Dynamics, Institute of Basic Biomedical Sciences, Johns Hopkins University, Baltimore, MD, USA
| | - Cristian Saez Gonzalez
- Department of Cell Biology, School of Medicine, Johns Hopkins University, Baltimore, MD, USA
- Center for Cell Dynamics, Institute of Basic Biomedical Sciences, Johns Hopkins University, Baltimore, MD, USA
| | - Ibuki Kawamata
- Department of Robotics, Tohoku University, Tohoku, Japan
- Natural Science Division, Ochanomizu University, Kyoto, Japan
- Graduate School of Science, Kyoto University, Kyoto, Japan
| | - Takanari Inoue
- Department of Cell Biology, School of Medicine, Johns Hopkins University, Baltimore, MD, USA.
- Center for Cell Dynamics, Institute of Basic Biomedical Sciences, Johns Hopkins University, Baltimore, MD, USA.
| |
Collapse
|
3
|
Zakaria MF, Sonoda S, Kato H, Ma L, Uehara N, Kyumoto-Nakamura Y, Sharifa MM, Yu L, Dai L, Yamauchi-Tomoda E, Aijima R, Yamaza H, Nishimura F, Yamaza T. Erythropoietin receptor signal is crucial for periodontal ligament stem cell-based tissue reconstruction in periodontal disease. Sci Rep 2024; 14:6719. [PMID: 38509204 PMCID: PMC10954634 DOI: 10.1038/s41598-024-57361-y] [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: 11/11/2023] [Accepted: 03/18/2024] [Indexed: 03/22/2024] Open
Abstract
Alveolar bone loss caused by periodontal disease eventually leads to tooth loss. Periodontal ligament stem cells (PDLSCs) are the tissue-specific cells for maintaining and repairing the periodontal ligament, cementum, and alveolar bone. Here, we investigated the role of erythropoietin receptor (EPOR), which regulates the microenvironment-modulating function of mesenchymal stem cells, in PDLSC-based periodontal therapy. We isolated PDLSCs from patients with chronic periodontal disease and healthy donors, referred to as PD-PDLSCs and Cont-PDLSCs, respectively. PD-PDLSCs exhibited reduced potency of periodontal tissue regeneration and lower expression of EPOR compared to Cont-PDLSCs. EPOR-silencing suppressed the potency of Cont-PDLSCs mimicking PD-PDLSCs, whereas EPO-mediated EPOR activation rejuvenated the reduced potency of PD-PDLSCs. Furthermore, we locally transplanted EPOR-silenced and EPOR-activated PDLSCs into the gingiva around the teeth of ligament-induced periodontitis model mice and demonstrated that EPOR in PDLSCs participated in the regeneration of the periodontal ligament, cementum, and alveolar bone in the ligated teeth. The EPOR-mediated paracrine function of PDLSCs maintains periodontal immune suppression and bone metabolic balance via osteoclasts and osteoblasts in the periodontitis model mice. Taken together, these results suggest that EPOR signaling is crucial for PDLSC-based periodontal regeneration and paves the way for the development of novel options for periodontal therapy.
Collapse
Affiliation(s)
- Mhd Fouad Zakaria
- Department of Molecular Cell Biology and Oral Anatomy, Kyushu University Graduate School of Dental Science, 3-1-1 Maidashi, Higashi-ku, Fukuoka, 812-8582, Japan
- Department of Periodontology, Kyushu University Graduate School of Dental Science, Fukuoka, Japan
| | - Soichiro Sonoda
- Department of Molecular Cell Biology and Oral Anatomy, Kyushu University Graduate School of Dental Science, 3-1-1 Maidashi, Higashi-ku, Fukuoka, 812-8582, Japan
| | - Hiroki Kato
- Department of Molecular Cell Biology and Oral Anatomy, Kyushu University Graduate School of Dental Science, 3-1-1 Maidashi, Higashi-ku, Fukuoka, 812-8582, Japan
| | - Lan Ma
- Department of Molecular Cell Biology and Oral Anatomy, Kyushu University Graduate School of Dental Science, 3-1-1 Maidashi, Higashi-ku, Fukuoka, 812-8582, Japan
- Guangdong Provincial Key Laboratory of Stomatology, South China Center of Craniofacial Stem Cell Research, Hospital of Stomatology, Guanghua School of Stomatology, Sun Yat-sen University, Guangzhou, China
| | - Norihisa Uehara
- Department of Molecular Cell Biology and Oral Anatomy, Kyushu University Graduate School of Dental Science, 3-1-1 Maidashi, Higashi-ku, Fukuoka, 812-8582, Japan
| | - Yukari Kyumoto-Nakamura
- Department of Molecular Cell Biology and Oral Anatomy, Kyushu University Graduate School of Dental Science, 3-1-1 Maidashi, Higashi-ku, Fukuoka, 812-8582, Japan
| | - M Majd Sharifa
- Department of Molecular Cell Biology and Oral Anatomy, Kyushu University Graduate School of Dental Science, 3-1-1 Maidashi, Higashi-ku, Fukuoka, 812-8582, Japan
| | - Liting Yu
- Department of Molecular Cell Biology and Oral Anatomy, Kyushu University Graduate School of Dental Science, 3-1-1 Maidashi, Higashi-ku, Fukuoka, 812-8582, Japan
| | - Lisha Dai
- Department of Molecular Cell Biology and Oral Anatomy, Kyushu University Graduate School of Dental Science, 3-1-1 Maidashi, Higashi-ku, Fukuoka, 812-8582, Japan
| | - Erika Yamauchi-Tomoda
- Department of Oral and Maxillofacial Radiology, Kyushu University Graduate School of Dental Science, Fukuoka, Japan
| | - Reona Aijima
- Department of Oral and Maxillofacial Surgery, Faculty of Medicine, Saga University, Saga, Japan
| | - Haruyoshi Yamaza
- Department of Pediatric Dentistry, Kyushu University Graduate School of Dental Science, Fukuoka, Japan
| | - Fusanori Nishimura
- Department of Periodontology, Kyushu University Graduate School of Dental Science, Fukuoka, Japan
| | - Takayoshi Yamaza
- Department of Molecular Cell Biology and Oral Anatomy, Kyushu University Graduate School of Dental Science, 3-1-1 Maidashi, Higashi-ku, Fukuoka, 812-8582, Japan.
| |
Collapse
|
4
|
Tsay A, Wang JC. The Role of PIK3R1 in Metabolic Function and Insulin Sensitivity. Int J Mol Sci 2023; 24:12665. [PMID: 37628845 PMCID: PMC10454413 DOI: 10.3390/ijms241612665] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2023] [Revised: 08/04/2023] [Accepted: 08/08/2023] [Indexed: 08/27/2023] Open
Abstract
PIK3R1 (also known as p85α) is a regulatory subunit of phosphoinositide 3-kinases (PI3Ks). PI3K, a heterodimer of a regulatory subunit and a catalytic subunit, phosphorylates phosphatidylinositol into secondary signaling molecules involved in regulating metabolic homeostasis. PI3K converts phosphatidylinositol 4,5-bisphosphate (PIP2) to phosphatidylinositol 3,4,5-triphosphate (PIP3), which recruits protein kinase AKT to the inner leaflet of the cell membrane to be activated and to participate in various metabolic functions. PIK3R1 stabilizes and inhibits p110 catalytic activity and serves as an adaptor to interact with insulin receptor substrate (IRS) proteins and growth factor receptors. Thus, mutations in PIK3R1 or altered expression of PIK3R1 could modulate the activity of PI3K and result in significant metabolic outcomes. Interestingly, recent studies also found PI3K-independent functions of PIK3R1. Overall, in this article, we will provide an updated review of the metabolic functions of PIK3R1 that includes studies of PIK3R1 in various metabolic tissues using animal models, the mechanisms modulating PIK3R1 activity, and studies on the mutations of human PIK3R1 gene.
Collapse
Affiliation(s)
- Ariel Tsay
- Metabolic Biology Graduate Program, University of California Berkeley, Berkeley, CA 94720, USA;
- Department of Nutritional Sciences & Toxicology, University of California Berkeley, Berkeley, CA 94720, USA
| | - Jen-Chywan Wang
- Metabolic Biology Graduate Program, University of California Berkeley, Berkeley, CA 94720, USA;
- Department of Nutritional Sciences & Toxicology, University of California Berkeley, Berkeley, CA 94720, USA
- Endocrinology Graduate Program, University of California Berkeley, Berkeley, CA 94720, USA
| |
Collapse
|
5
|
Ren JG, Xing B, Lv K, O’Keefe RA, Wu M, Wang R, Bauer KM, Ghazaryan A, Burslem GM, Zhang J, O’Connell RM, Pillai V, Hexner EO, Philips MR, Tong W. RAB27B controls palmitoylation-dependent NRAS trafficking and signaling in myeloid leukemia. J Clin Invest 2023; 133:e165510. [PMID: 37317963 PMCID: PMC10266782 DOI: 10.1172/jci165510] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2022] [Accepted: 03/24/2023] [Indexed: 06/16/2023] Open
Abstract
RAS mutations are among the most prevalent oncogenic drivers in cancers. RAS proteins propagate signals only when associated with cellular membranes as a consequence of lipid modifications that impact their trafficking. Here, we discovered that RAB27B, a RAB family small GTPase, controlled NRAS palmitoylation and trafficking to the plasma membrane, a localization required for activation. Our proteomic studies revealed RAB27B upregulation in CBL- or JAK2-mutated myeloid malignancies, and its expression correlated with poor prognosis in acute myeloid leukemias (AMLs). RAB27B depletion inhibited the growth of CBL-deficient or NRAS-mutant cell lines. Strikingly, Rab27b deficiency in mice abrogated mutant but not WT NRAS-mediated progenitor cell growth, ERK signaling, and NRAS palmitoylation. Further, Rab27b deficiency significantly reduced myelomonocytic leukemia development in vivo. Mechanistically, RAB27B interacted with ZDHHC9, a palmitoyl acyltransferase that modifies NRAS. By regulating palmitoylation, RAB27B controlled c-RAF/MEK/ERK signaling and affected leukemia development. Importantly, RAB27B depletion in primary human AMLs inhibited oncogenic NRAS signaling and leukemic growth. We further revealed a significant correlation between RAB27B expression and sensitivity to MEK inhibitors in AMLs. Thus, our studies presented a link between RAB proteins and fundamental aspects of RAS posttranslational modification and trafficking, highlighting future therapeutic strategies for RAS-driven cancers.
Collapse
Affiliation(s)
- Jian-Gang Ren
- The State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST) and Key Laboratory of Oral Biomedicine, Ministry of Education, School and Hospital of Stomatology, Wuhan University, Wuhan, Hubei, China
- Division of Hematology, Children’s Hospital of Philadelphia, Philadelphia, Pennsylvania, USA
- Department of Pediatrics, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - Bowen Xing
- Division of Hematology, Children’s Hospital of Philadelphia, Philadelphia, Pennsylvania, USA
- Department of Pediatrics, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - Kaosheng Lv
- Division of Hematology, Children’s Hospital of Philadelphia, Philadelphia, Pennsylvania, USA
- Department of Pediatrics, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, Pennsylvania, USA
- Department of Biochemistry, School of Medicine at the Southern University of Science and Technology, Shenzhen, Guangdong, China
| | - Rachel A. O’Keefe
- Department of Medicine and Perlmutter Cancer Center, New York University Grossman School of Medicine, New York, New York, USA
| | - Mengfang Wu
- Division of Hematology, Children’s Hospital of Philadelphia, Philadelphia, Pennsylvania, USA
- Department of Pediatrics, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - Ruoxing Wang
- Division of Hematology, Children’s Hospital of Philadelphia, Philadelphia, Pennsylvania, USA
- Department of Pediatrics, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - Kaylyn M. Bauer
- Department of Pathology, University of Utah, Salt Lake City, Utah, USA
| | - Arevik Ghazaryan
- Department of Pathology, University of Utah, Salt Lake City, Utah, USA
| | - George M. Burslem
- Department of Biochemistry and Biophysics, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - Jing Zhang
- McArdle Laboratory for Cancer Research, University of Wisconsin–Madison, Madison, Wisconsin, USA
| | - Ryan M. O’Connell
- Department of Pathology, University of Utah, Salt Lake City, Utah, USA
| | - Vinodh Pillai
- Pathology and Laboratory Medicine, Children’s Hospital of Philadelphia, Philadelphia, Pennsylvania, USA
| | - Elizabeth O. Hexner
- Division of Hematology and Oncology, Abramson Cancer Center, University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - Mark R. Philips
- Department of Medicine and Perlmutter Cancer Center, New York University Grossman School of Medicine, New York, New York, USA
| | - Wei Tong
- Division of Hematology, Children’s Hospital of Philadelphia, Philadelphia, Pennsylvania, USA
- Department of Pediatrics, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, Pennsylvania, USA
| |
Collapse
|
6
|
Matsubayashi H, Mountain J, Yao T, Peterson A, Roy AD, Inoue T. Non-catalytic role of phosphoinositide 3-kinase in mesenchymal cell migration through non-canonical induction of p85β/AP-2-mediated endocytosis. RESEARCH SQUARE 2023:rs.3.rs-2432041. [PMID: 36712095 PMCID: PMC9882665 DOI: 10.21203/rs.3.rs-2432041/v1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
Class IA phosphoinositide 3-kinase (PI3K) galvanizes fundamental cellular processes such as migration, proliferation, and differentiation. To enable multifaceted roles, the catalytic subunit p110 utilizes a multi-domain, regulatory subunit p85 through its inter SH2 domain (iSH2). In cell migration, their product PI(3,4,5)P3 generates locomotive activity. While non-catalytic roles are also implicated, underlying mechanisms and its relationship to PI(3,4,5)P3 signaling remain elusive. Here, we report that a disordered region of iSH2 contains previously uncharacterized AP-2 binding motifs which can trigger clathrin and dynamin-mediated endocytosis independent of PI3K catalytic activity. The AP-2 binding motif mutants of p85 aberrantly accumulate at focal adhesions and upregulate both velocity and persistency in fibroblast migration. We thus propose the dual functionality of PI3K in the control of cell motility, catalytic and non-catalytic, arising distinctly from juxtaposed regions within iSH2.
Collapse
|
7
|
Matsubayashi HT, Mountain J, Yao T, Peterson AF, Deb Roy A, Inoue T. Non-catalytic role of phosphoinositide 3-kinase in mesenchymal cell migration through non-canonical induction of p85β/AP-2-mediated endocytosis. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2023:2022.12.31.522383. [PMID: 36712134 PMCID: PMC9881872 DOI: 10.1101/2022.12.31.522383] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Class IA phosphoinositide 3-kinase (PI3K) galvanizes fundamental cellular processes such as migration, proliferation, and differentiation. To enable multifaceted roles, the catalytic subunit p110 utilizes a multidomain, regulatory subunit p85 through its inter SH2 domain (iSH2). In cell migration, their product PI(3,4,5)P3 generates locomotive activity. While non-catalytic roles are also implicated, underlying mechanisms and its relationship to PI(3,4,5)P3 signaling remain elusive. Here, we report that a disordered region of iSH2 contains previously uncharacterized AP-2 binding motifs which can trigger clathrin and dynamin-mediated endocytosis independent of PI3K catalytic activity. The AP-2 binding motif mutants of p85 aberrantly accumulate at focal adhesions and upregulate both velocity and persistency in fibroblast migration. We thus propose the dual functionality of PI3K in the control of cell motility, catalytic and non-catalytic, arising distinctly from juxtaposed regions within iSH2.
Collapse
Affiliation(s)
- Hideaki T. Matsubayashi
- Department of Cell Biology, School of Medicine, Johns Hopkins University
- Center for Cell Dynamics, Institute of Basic Biomedical Sciences, Johns Hopkins University
| | - Jack Mountain
- Department of Cell Biology, School of Medicine, Johns Hopkins University
- Center for Cell Dynamics, Institute of Basic Biomedical Sciences, Johns Hopkins University
| | - Tony Yao
- Department of Cell Biology, School of Medicine, Johns Hopkins University
- Center for Cell Dynamics, Institute of Basic Biomedical Sciences, Johns Hopkins University
| | - Amy F. Peterson
- Department of Cell Biology, School of Medicine, Johns Hopkins University
- Center for Cell Dynamics, Institute of Basic Biomedical Sciences, Johns Hopkins University
| | - Abhijit Deb Roy
- Department of Cell Biology, School of Medicine, Johns Hopkins University
- Center for Cell Dynamics, Institute of Basic Biomedical Sciences, Johns Hopkins University
| | - Takanari Inoue
- Department of Cell Biology, School of Medicine, Johns Hopkins University
- Center for Cell Dynamics, Institute of Basic Biomedical Sciences, Johns Hopkins University
| |
Collapse
|
8
|
The Role of PI3K/AKT and MAPK Signaling Pathways in Erythropoietin Signalization. Int J Mol Sci 2021; 22:ijms22147682. [PMID: 34299300 PMCID: PMC8307237 DOI: 10.3390/ijms22147682] [Citation(s) in RCA: 34] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2021] [Revised: 07/14/2021] [Accepted: 07/16/2021] [Indexed: 12/11/2022] Open
Abstract
Erythropoietin (EPO) is a glycoprotein cytokine known for its pleiotropic effects on various types of cells and tissues. EPO and its receptor EPOR trigger signaling cascades JAK2/STAT5, MAPK, and PI3K/AKT that are interconnected and irreplaceable for cell survival. In this article, we describe the role of the MAPK and PI3K/AKT signaling pathways during red blood cell formation as well as in non-hematopoietic tissues and tumor cells. Although the central framework of these pathways is similar for most of cell types, there are some stage-specific, tissue, and cell-lineage differences. We summarize the current state of research in this field, highlight the novel members of EPO-induced PI3K and MAPK signaling, and in this respect also the differences between erythroid and non-erythroid cells.
Collapse
|
9
|
Sun J, Dong Z, Chang Z, Liu H, Jiang Q, Zhang D, Lu S, Jia X, Wu D, Ge A, Zhao P, Wang J, Lu Y. MARCH6 promotes hepatocellular carcinoma development through up-regulation of ATF2. BMC Cancer 2021; 21:827. [PMID: 34273954 PMCID: PMC8285810 DOI: 10.1186/s12885-021-08540-x] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2021] [Accepted: 06/28/2021] [Indexed: 12/02/2022] Open
Abstract
Background Hepatocellular carcinoma (HCC) is a common cause of cancer mortality worldwide. Recent studies have shown that the polytopic enzyme membrane associated ring-CH-type finger 6 (MARCH6) participates in tumorigenesis, but its function in HCC development needs to be investigated. This study aimed to explore the role of MARCH6 in HCC. Methods Expression of MARCH6 in human HCC samples was checked by immunohistochemical staining assay. Clinical relevance of MARCH6 and activating transcription factor 2 (ATF2) was analyzed from TCGA database. CCK-8, EdU staining, colony formation and transwell were performed to assess cell proliferation, growth and migration. Xenografted tumorigenesis was used to examine in vivo role MARCH6. Immunoblotting was applied to detect protein abundance. Results We found that MARCH6 expression was elevated in human HCC samples. Over-expression of MARCH6 was associated with poor prognosis of HCC patients. Up-expression of MARCH6 promoted cell growth and migration of HCC cells. In contrast, the HCC cell growth and migration were suppressed by MARCH6 knockdown. Furthermore, the DNA synthesis was enhanced by MARCH6. The expression of ATF2 was potentiated by MARCH6 over-expression, while it was suppressed by MARCH6 silencing. TCGA database showed positive correlation between the expression of MARCH6 and ATF2. Importantly, ATF2 expression contributed to the oncogenic function of HCC cells. Conclusion Our findings suggest that MARCH6-mediated ATF2 up-regulation contributes to HCC development. MARCH6 may be a promising target for the diagnosis and treatment of HCC. Supplementary Information The online version contains supplementary material available at 10.1186/s12885-021-08540-x.
Collapse
Affiliation(s)
- Jie Sun
- Comprehensive Liver Cancer Center, The Fifth Medical Center of PLA General Hospital, Beijing, 100039, China
| | - Zheng Dong
- Comprehensive Liver Cancer Center, The Fifth Medical Center of PLA General Hospital, Beijing, 100039, China
| | - Zhengyao Chang
- Department of General Surgery, The Fifth Medical Center of PLA General Hospital, Beijing, 100039, China
| | - Hongfei Liu
- Beijing Syngentech Co., Ltd., Beijing, 102206, China
| | - Qiyu Jiang
- Research Center for Clinical and Translational Medicine, The Fifth Medical Center of PLA General Hospital, Beijing, 100039, China
| | - Deyuan Zhang
- Comprehensive Liver Cancer Center, The Fifth Medical Center of PLA General Hospital, Beijing, 100039, China
| | - Shanshan Lu
- Comprehensive Liver Cancer Center, The Fifth Medical Center of PLA General Hospital, Beijing, 100039, China
| | - Xiaodong Jia
- Comprehensive Liver Cancer Center, The Fifth Medical Center of PLA General Hospital, Beijing, 100039, China
| | - Dawei Wu
- Comprehensive Liver Cancer Center, The Fifth Medical Center of PLA General Hospital, Beijing, 100039, China
| | - Aaron Ge
- Comprehensive Liver Cancer Center, The Fifth Medical Center of PLA General Hospital, Beijing, 100039, China
| | - Pan Zhao
- Department of Infectious Diseases, The Fifth Medical Center of PLA General Hospital, Beijing, 100039, China.
| | - Jing Wang
- State key Laboratory of Toxicology and Medical Countermeasures, Beijing Institute of Pharmacology and Toxicology, Beijing, 100850, China.
| | - Yinying Lu
- Comprehensive Liver Cancer Center, The Fifth Medical Center of PLA General Hospital, Beijing, 100039, China.
| |
Collapse
|
10
|
Chen TC, Kuo T, Dandan M, Lee RA, Chang M, Villivalam SD, Liao SC, Costello D, Shankaran M, Mohammed H, Kang S, Hellerstein MK, Wang JC. The role of striated muscle Pik3r1 in glucose and protein metabolism following chronic glucocorticoid exposure. J Biol Chem 2021; 296:100395. [PMID: 33567340 PMCID: PMC8010618 DOI: 10.1016/j.jbc.2021.100395] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2020] [Revised: 01/29/2021] [Accepted: 02/04/2021] [Indexed: 11/03/2022] Open
Abstract
Chronic glucocorticoid exposure causes insulin resistance and muscle atrophy in skeletal muscle. We previously identified phosphoinositide-3-kinase regulatory subunit 1 (Pik3r1) as a primary target gene of skeletal muscle glucocorticoid receptors involved in the glucocorticoid-mediated suppression of insulin action. However, the in vivo functions of Pik3r1 remain unclear. Here, we generated striated muscle-specific Pik3r1 knockout (MKO) mice and treated them with a dexamethasone (DEX), a synthetic glucocorticoid. Treating wildtype (WT) mice with DEX attenuated insulin activated Akt activity in liver, epididymal white adipose tissue, and gastrocnemius (GA) muscle. This DEX effect was diminished in GA muscle of MKO mice, therefore, resulting in improved glucose and insulin tolerance in DEX-treated MKO mice. Stable isotope labeling techniques revealed that in WT mice, DEX treatment decreased protein fractional synthesis rates in GA muscle. Furthermore, histology showed that in WT mice, DEX treatment reduced GA myotube diameters. In MKO mice, myotube diameters were smaller than in WT mice, and there were more fast oxidative fibers. Importantly, DEX failed to further reduce myotube diameters. Pik3r1 knockout also decreased basal protein synthesis rate (likely caused by lower 4E-BP1 phosphorylation at Thr37/Thr46) and curbed the ability of DEX to attenuate protein synthesis rate. Finally, the ability of DEX to inhibit eIF2α phosphorylation and insulin-induced 4E-BP1 phosphorylation was reduced in MKO mice. Taken together, these results demonstrate the role of Pik3r1 in glucocorticoid-mediated effects on glucose and protein metabolism in skeletal muscle.
Collapse
Affiliation(s)
- Tzu-Chieh Chen
- Metabolic Biology Graduate Program, University of California Berkeley, Berkeley, California, USA; Department of Nutritional Sciences & Toxicology, University of California Berkeley, Berkeley, California, USA
| | - Taiyi Kuo
- Department of Nutritional Sciences & Toxicology, University of California Berkeley, Berkeley, California, USA; Endocrinology Graduate Program, University of California Berkeley, Berkeley, California, USA
| | - Mohamad Dandan
- Metabolic Biology Graduate Program, University of California Berkeley, Berkeley, California, USA; Department of Nutritional Sciences & Toxicology, University of California Berkeley, Berkeley, California, USA
| | - Rebecca A Lee
- Department of Nutritional Sciences & Toxicology, University of California Berkeley, Berkeley, California, USA; Endocrinology Graduate Program, University of California Berkeley, Berkeley, California, USA
| | - Maggie Chang
- Department of Nutritional Sciences & Toxicology, University of California Berkeley, Berkeley, California, USA; Endocrinology Graduate Program, University of California Berkeley, Berkeley, California, USA
| | - Sneha D Villivalam
- Department of Nutritional Sciences & Toxicology, University of California Berkeley, Berkeley, California, USA; Endocrinology Graduate Program, University of California Berkeley, Berkeley, California, USA
| | - Szu-Chi Liao
- Department of Nutritional Sciences & Toxicology, University of California Berkeley, Berkeley, California, USA; Endocrinology Graduate Program, University of California Berkeley, Berkeley, California, USA
| | - Damian Costello
- Department of Nutritional Sciences & Toxicology, University of California Berkeley, Berkeley, California, USA; Endocrinology Graduate Program, University of California Berkeley, Berkeley, California, USA
| | - Mahalakshmi Shankaran
- Department of Nutritional Sciences & Toxicology, University of California Berkeley, Berkeley, California, USA
| | - Hussein Mohammed
- Department of Nutritional Sciences & Toxicology, University of California Berkeley, Berkeley, California, USA
| | - Sona Kang
- Metabolic Biology Graduate Program, University of California Berkeley, Berkeley, California, USA; Department of Nutritional Sciences & Toxicology, University of California Berkeley, Berkeley, California, USA; Endocrinology Graduate Program, University of California Berkeley, Berkeley, California, USA
| | - Marc K Hellerstein
- Metabolic Biology Graduate Program, University of California Berkeley, Berkeley, California, USA; Department of Nutritional Sciences & Toxicology, University of California Berkeley, Berkeley, California, USA; Endocrinology Graduate Program, University of California Berkeley, Berkeley, California, USA
| | - Jen-Chywan Wang
- Metabolic Biology Graduate Program, University of California Berkeley, Berkeley, California, USA; Department of Nutritional Sciences & Toxicology, University of California Berkeley, Berkeley, California, USA; Endocrinology Graduate Program, University of California Berkeley, Berkeley, California, USA.
| |
Collapse
|
11
|
Bhoopalan SV, Huang LJS, Weiss MJ. Erythropoietin regulation of red blood cell production: from bench to bedside and back. F1000Res 2020; 9:F1000 Faculty Rev-1153. [PMID: 32983414 PMCID: PMC7503180 DOI: 10.12688/f1000research.26648.1] [Citation(s) in RCA: 32] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 09/04/2020] [Indexed: 12/18/2022] Open
Abstract
More than 50 years of efforts to identify the major cytokine responsible for red blood cell (RBC) production (erythropoiesis) led to the identification of erythropoietin (EPO) in 1977 and its receptor (EPOR) in 1989, followed by three decades of rich scientific discovery. We now know that an elaborate oxygen-sensing mechanism regulates the production of EPO, which in turn promotes the maturation and survival of erythroid progenitors. Engagement of the EPOR by EPO activates three interconnected signaling pathways that drive RBC production via diverse downstream effectors and simultaneously trigger negative feedback loops to suppress signaling activity. Together, the finely tuned mechanisms that drive endogenous EPO production and facilitate its downstream activities have evolved to maintain RBC levels in a narrow physiological range and to respond rapidly to erythropoietic stresses such as hypoxia or blood loss. Examination of these pathways has elucidated the genetics of numerous inherited and acquired disorders associated with deficient or excessive RBC production and generated valuable drugs to treat anemia, including recombinant human EPO and more recently the prolyl hydroxylase inhibitors, which act partly by stimulating endogenous EPO synthesis. Ongoing structure-function studies of the EPOR and its essential partner, tyrosine kinase JAK2, suggest that it may be possible to generate new "designer" drugs that control selected subsets of cytokine receptor activities for therapeutic manipulation of hematopoiesis and treatment of blood cancers.
Collapse
Affiliation(s)
- Senthil Velan Bhoopalan
- Department of Hematology, St. Jude Children’s Research Hospital, 262 Danny Thomas Place, MS #355, Memphis, TN, 38105, USA
| | - Lily Jun-shen Huang
- Department of Cell Biology, University of Texas Southwestern Medical Center, 5323 Harry Hines Boulevard, Dallas, TX, 75390, USA
| | - Mitchell J. Weiss
- Department of Hematology, St. Jude Children’s Research Hospital, 262 Danny Thomas Place, MS #355, Memphis, TN, 38105, USA
| |
Collapse
|
12
|
Wilmes S, Hafer M, Vuorio J, Tucker JA, Winkelmann H, Löchte S, Stanly TA, Pulgar Prieto KD, Poojari C, Sharma V, Richter CP, Kurre R, Hubbard SR, Garcia KC, Moraga I, Vattulainen I, Hitchcock IS, Piehler J. Mechanism of homodimeric cytokine receptor activation and dysregulation by oncogenic mutations. Science 2020; 367:643-652. [PMID: 32029621 PMCID: PMC8117407 DOI: 10.1126/science.aaw3242] [Citation(s) in RCA: 94] [Impact Index Per Article: 23.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2018] [Revised: 10/08/2019] [Accepted: 12/20/2019] [Indexed: 12/11/2022]
Abstract
Homodimeric class I cytokine receptors are assumed to exist as preformed dimers that are activated by ligand-induced conformational changes. We quantified the dimerization of three prototypic class I cytokine receptors in the plasma membrane of living cells by single-molecule fluorescence microscopy. Spatial and spatiotemporal correlation of individual receptor subunits showed ligand-induced dimerization and revealed that the associated Janus kinase 2 (JAK2) dimerizes through its pseudokinase domain. Oncogenic receptor and hyperactive JAK2 mutants promoted ligand-independent dimerization, highlighting the formation of receptor dimers as the switch responsible for signal activation. Atomistic modeling and molecular dynamics simulations based on a detailed energetic analysis of the interactions involved in dimerization yielded a mechanistic blueprint for homodimeric class I cytokine receptor activation and its dysregulation by individual mutations.
Collapse
Affiliation(s)
- Stephan Wilmes
- Department of Biology and Center of Cellular Nanoanalytics, University of Osnabrück, 49076 Osnabrück, Germany
- Division of Cell Signalling and Immunology, School of Life Sciences, University of Dundee, Dundee, UK
| | - Maximillian Hafer
- Department of Biology and Center of Cellular Nanoanalytics, University of Osnabrück, 49076 Osnabrück, Germany
| | - Joni Vuorio
- Department of Physics, University of Helsinki, Helsinki, Finland
- Computational Physics Laboratory, Tampere University, Tampere, Finland
| | - Julie A Tucker
- York Biomedical Research Institute and Department of Biology, University of York, Heslington, York YO10 5DD, UK
| | - Hauke Winkelmann
- Department of Biology and Center of Cellular Nanoanalytics, University of Osnabrück, 49076 Osnabrück, Germany
| | - Sara Löchte
- Department of Biology and Center of Cellular Nanoanalytics, University of Osnabrück, 49076 Osnabrück, Germany
| | - Tess A Stanly
- York Biomedical Research Institute and Department of Biology, University of York, Heslington, York YO10 5DD, UK
| | - Katiuska D Pulgar Prieto
- York Biomedical Research Institute and Department of Biology, University of York, Heslington, York YO10 5DD, UK
| | - Chetan Poojari
- Department of Physics, University of Helsinki, Helsinki, Finland
| | - Vivek Sharma
- Department of Physics, University of Helsinki, Helsinki, Finland
- Institute of Biotechnology, University of Helsinki, Helsinki, Finland
| | - Christian P Richter
- Department of Biology and Center of Cellular Nanoanalytics, University of Osnabrück, 49076 Osnabrück, Germany
| | - Rainer Kurre
- Department of Biology and Center of Cellular Nanoanalytics, University of Osnabrück, 49076 Osnabrück, Germany
| | - Stevan R Hubbard
- Skirball Institute and Department of Biochemistry and Molecular Pharmacology, New York University School of Medicine, New York, NY, USA
| | - K Christopher Garcia
- Howard Hughes Medical Institute, Stanford University School of Medicine, Stanford, CA, USA
- Department of Molecular and Cellular Physiology and Department of Structural Biology, Stanford University School of Medicine, Stanford, CA, USA
| | - Ignacio Moraga
- Division of Cell Signalling and Immunology, School of Life Sciences, University of Dundee, Dundee, UK
| | - Ilpo Vattulainen
- Department of Physics, University of Helsinki, Helsinki, Finland.
- Computational Physics Laboratory, Tampere University, Tampere, Finland
| | - Ian S Hitchcock
- York Biomedical Research Institute and Department of Biology, University of York, Heslington, York YO10 5DD, UK.
| | - Jacob Piehler
- Department of Biology and Center of Cellular Nanoanalytics, University of Osnabrück, 49076 Osnabrück, Germany.
| |
Collapse
|
13
|
Held MA, Greenfest-Allen E, Su S, Stoeckert CJ, Stokes MP, Wojchowski DM. Phospho-PTM proteomic discovery of novel EPO- modulated kinases and phosphatases, including PTPN18 as a positive regulator of EPOR/JAK2 Signaling. Cell Signal 2020; 69:109554. [PMID: 32027948 DOI: 10.1016/j.cellsig.2020.109554] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2019] [Revised: 01/30/2020] [Accepted: 01/31/2020] [Indexed: 02/07/2023]
Abstract
The formation of erythroid progenitor cells depends sharply upon erythropoietin (EPO), its cell surface receptor (erythropoietin receptor, EPOR), and Janus kinase 2 (JAK2). Clinically, recombinant human EPO (rhEPO) additionally is an important anti-anemia agent for chronic kidney disease (CKD), myelodysplastic syndrome (MDS) and chemotherapy, but induces hypertension, and can exert certain pro-tumorigenic effects. Cellular signals transduced by EPOR/JAK2 complexes, and the nature of EPO-modulated signal transduction factors, therefore are of significant interest. By employing phospho-tyrosine post-translational modification (p-Y PTM) proteomics and human EPO- dependent UT7epo cells, we have identified 22 novel kinases and phosphatases as novel EPO targets, together with their specific sites of p-Y modification. New kinases modified due to EPO include membrane palmitoylated protein 1 (MPP1) and guanylate kinase 1 (GUK1) guanylate kinases, together with the cytoskeleton remodeling kinases, pseudopodium enriched atypical kinase 1 (PEAK1) and AP2 associated kinase 1 (AAK1). Novel EPO- modified phosphatases include protein tyrosine phosphatase receptor type A (PTPRA), phosphohistidine phosphatase 1 (PHPT1), tensin 2 (TENC1), ubiquitin associated and SH3 domain containing B (UBASH3B) and protein tyrosine phosphatase non-receptor type 18 (PTPN18). Based on PTPN18's high expression in hematopoietic progenitors, its novel connection to JAK kinase signaling, and a unique EPO- regulated PTPN18-pY389 motif which is modulated by JAK2 inhibitors, PTPN18's actions in UT7epo cells were investigated. Upon ectopic expression, wt-PTPN18 promoted EPO dose-dependent cell proliferation, and survival. Mechanistically, PTPN18 sustained the EPO- induced activation of not only mitogen-activated protein kinases 1 and 3 (ERK1/2), AKT serine/threonine kinase 1-3 (AKT), and signal transducer and activator of transcription 5A and 5B (STAT5), but also JAK2. Each effect further proved to depend upon PTPN18's EPO- modulated (p)Y389 site. In analyses of the EPOR and the associated adaptor protein RHEX (regulator of hemoglobinization and erythroid cell expansion), wt-PTPN18 increased high molecular weight EPOR forms, while sharply inhibiting the EPO-induced phosphorylation of RHEX-pY141. Each effect likewise depended upon PTPN18-Y389. PTPN18 thus promotes signals for EPO-dependent hematopoietic cell growth, and may represent a new druggable target for myeloproliferative neoplasms.
Collapse
Affiliation(s)
- Matthew A Held
- Department of Molecular, Cellular and Biomedical Sciences, University of New Hampshire, Durham, NH, 03824, United States of America
| | - Emily Greenfest-Allen
- Department of Genetics, University of Pennsylvania, Philadelphia, PA, 19104, United States of America
| | - Su Su
- Molecular Medicine Department, Maine Medical Center Research Institute, Scarborough, ME, 04074, United States of America
| | - Christian J Stoeckert
- Department of Genetics, University of Pennsylvania, Philadelphia, PA, 19104, United States of America
| | - Matthew P Stokes
- Proteomics Division, Cell Signaling Technology, Danvers, MA, 01923., United States of America
| | - Don M Wojchowski
- Department of Molecular, Cellular and Biomedical Sciences, University of New Hampshire, Durham, NH, 03824, United States of America.
| |
Collapse
|
14
|
Bally APR, Neeld DK, Lu P, Majumder P, Tang Y, Barwick BG, Wang Q, Boss JM. PD-1 Expression during Acute Infection Is Repressed through an LSD1-Blimp-1 Axis. THE JOURNAL OF IMMUNOLOGY 2019; 204:449-458. [PMID: 31811020 DOI: 10.4049/jimmunol.1900601] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/28/2019] [Accepted: 11/08/2019] [Indexed: 12/23/2022]
Abstract
During prolonged exposure to Ags, such as chronic viral infections, sustained TCR signaling can result in T cell exhaustion mediated in part by expression of programmed cell death-1 (PD-1) encoded by the Pdcd1 gene. In this study, dynamic changes in histone H3K4 modifications at the Pdcd1 locus during ex vivo and in vivo activation of CD8 T cells suggested a potential role for the histone H3 lysine 4 demethylase LSD1 in regulating PD-1 expression. CD8 T cells lacking LSD1 expressed higher levels of Pdcd1 mRNA following ex vivo stimulation as well as increased surface levels of PD-1 during acute, but not chronic, infection with lymphocytic choriomeningitis virus (LCMV). Blimp-1, a known repressor of PD-1, recruited LSD1 to the Pdcd1 gene during acute, but not chronic, LCMV infection. Loss of DNA methylation at Pdcd1's promoter-proximal regulatory regions is highly correlated with its expression. However, following acute LCMV infection, in which PD-1 expression levels return to near baseline, LSD1-deficient CD8 T cells failed to remethylate the Pdcd1 locus to the levels of wild-type cells. Finally, in a murine melanoma model, the frequency of PD-1-expressing tumor-infiltrating LSD1-deficient CD8 T cells was greater than in wild type. Thus, LSD1 is recruited to the Pdcd1 locus by Blimp-1, downregulates PD-1 expression by facilitating the removal of activating histone marks, and is important for remethylation of the locus. Together, these data provide insight into the complex regulatory mechanisms governing T cell immunity and regulation of a critical T cell checkpoint gene.
Collapse
Affiliation(s)
- Alexander P R Bally
- Department of Microbiology and Immunology, Emory University School of Medicine, Atlanta, GA 30322; and.,Emory Vaccine Center, Emory University School of Medicine, Atlanta, GA 30322
| | - Dennis K Neeld
- Department of Microbiology and Immunology, Emory University School of Medicine, Atlanta, GA 30322; and.,Emory Vaccine Center, Emory University School of Medicine, Atlanta, GA 30322
| | - Peiyuan Lu
- Department of Microbiology and Immunology, Emory University School of Medicine, Atlanta, GA 30322; and.,Emory Vaccine Center, Emory University School of Medicine, Atlanta, GA 30322
| | - Parimal Majumder
- Department of Microbiology and Immunology, Emory University School of Medicine, Atlanta, GA 30322; and.,Emory Vaccine Center, Emory University School of Medicine, Atlanta, GA 30322
| | - Yan Tang
- Department of Microbiology and Immunology, Emory University School of Medicine, Atlanta, GA 30322; and.,Emory Vaccine Center, Emory University School of Medicine, Atlanta, GA 30322
| | - Benjamin G Barwick
- Department of Microbiology and Immunology, Emory University School of Medicine, Atlanta, GA 30322; and.,Emory Vaccine Center, Emory University School of Medicine, Atlanta, GA 30322
| | - Qing Wang
- Department of Microbiology and Immunology, Emory University School of Medicine, Atlanta, GA 30322; and.,Emory Vaccine Center, Emory University School of Medicine, Atlanta, GA 30322
| | - Jeremy M Boss
- Department of Microbiology and Immunology, Emory University School of Medicine, Atlanta, GA 30322; and .,Emory Vaccine Center, Emory University School of Medicine, Atlanta, GA 30322
| |
Collapse
|
15
|
Hatzi K, Geng H, Doane AS, Meydan C, LaRiviere R, Cardenas M, Duy C, Shen H, Vidal MNC, Baslan T, Mohammad HP, Kruger RG, Shaknovich R, Haberman AM, Inghirami G, Lowe SW, Melnick AM. Histone demethylase LSD1 is required for germinal center formation and BCL6-driven lymphomagenesis. Nat Immunol 2019; 20:86-96. [PMID: 30538335 PMCID: PMC6294324 DOI: 10.1038/s41590-018-0273-1] [Citation(s) in RCA: 59] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2017] [Accepted: 10/31/2018] [Indexed: 01/03/2023]
Abstract
Germinal center (GC) B cells feature repression of many gene enhancers to establish their characteristic transcriptome. Here we show that conditional deletion of Lsd1 in GCs significantly impaired GC formation, associated with failure to repress immune synapse genes linked to GC exit, which are also direct targets of the transcriptional repressor BCL6. We found that BCL6 directly binds LSD1 and recruits it primarily to intergenic and intronic enhancers. Conditional deletion of Lsd1 suppressed GC hyperplasia caused by constitutive expression of BCL6 and significantly delayed BCL6-driven lymphomagenesis. Administration of catalytic inhibitors of LSD1 had little effect on GC formation or GC-derived lymphoma cells. Using a CRISPR-Cas9 domain screen, we found instead that the LSD1 Tower domain was critical for dependence on LSD1 in GC-derived B cells. These results indicate an essential role for LSD1 in the humoral immune response, where it modulates enhancer function by forming repression complexes with BCL6.
Collapse
Affiliation(s)
- Katerina Hatzi
- Department of Medicine, Division of Hematology & Medical Oncology, Weill Cornell Medicine, New York, NY, USA
- Cancer Biology and Genetics Program, Sloan-Kettering Institute, Memorial Sloan Kettering Cancer Center, New York, NY, USA
| | - Huimin Geng
- Department of Laboratory Medicine, University of California, San Francisco, San Francisco, CA, USA
| | - Ashley S Doane
- Department of Medicine, Division of Hematology & Medical Oncology, Weill Cornell Medicine, New York, NY, USA
- Institute for Computational Biomedicine, Dept. of Physiology and Biophysics, Weill Cornell Medicine, New York, NY, USA
| | - Cem Meydan
- Institute for Computational Biomedicine, Dept. of Physiology and Biophysics, Weill Cornell Medicine, New York, NY, USA
| | - Reed LaRiviere
- Department of Medicine, Division of Hematology & Medical Oncology, Weill Cornell Medicine, New York, NY, USA
| | - Mariano Cardenas
- Department of Medicine, Division of Hematology & Medical Oncology, Weill Cornell Medicine, New York, NY, USA
- High Throughput and Spectroscopy Resource Center, Rockefeller University, New York, NY, USA
| | - Cihangir Duy
- Department of Medicine, Division of Hematology & Medical Oncology, Weill Cornell Medicine, New York, NY, USA
| | - Hao Shen
- Department of Medicine, Division of Hematology & Medical Oncology, Weill Cornell Medicine, New York, NY, USA
| | - Maria Nieves Calvo Vidal
- Department of Medicine, Division of Hematology & Medical Oncology, Weill Cornell Medicine, New York, NY, USA
| | - Timour Baslan
- Cancer Biology and Genetics Program, Sloan-Kettering Institute, Memorial Sloan Kettering Cancer Center, New York, NY, USA
| | - Helai P Mohammad
- Cancer Epigenetics Department, GlaxoSmithKline, Collegeville, PA, USA
| | - Ryan G Kruger
- Cancer Epigenetics Department, GlaxoSmithKline, Collegeville, PA, USA
| | - Rita Shaknovich
- Department of Medicine, Division of Hematology & Medical Oncology, Weill Cornell Medicine, New York, NY, USA
- Cancer Genetics Incorporated, Rutherford, NJ, USA
| | - Ann M Haberman
- Department of Laboratory Medicine, Department of Immunobiology Yale University School of Medicine, New Haven, CT, USA
| | - Giorgio Inghirami
- Department of Pathology and Laboratory Medicine, Weill Cornell Medicine, New York, NY, USA
| | - Scott W Lowe
- Cancer Biology and Genetics Program, Sloan-Kettering Institute, Memorial Sloan Kettering Cancer Center, New York, NY, USA
- Howard Hughes Medical Institute, Memorial Sloan Kettering Cancer Center, New York, NY, USA
| | - Ari M Melnick
- Department of Medicine, Division of Hematology & Medical Oncology, Weill Cornell Medicine, New York, NY, USA.
| |
Collapse
|
16
|
Hu P, Nebreda AR, Hanenberg H, Kinnebrew GH, Ivan M, Yoder MC, Filippi MD, Broxmeyer HE, Kapur R. P38α/JNK signaling restrains erythropoiesis by suppressing Ezh2-mediated epigenetic silencing of Bim. Nat Commun 2018; 9:3518. [PMID: 30158520 PMCID: PMC6115418 DOI: 10.1038/s41467-018-05955-2] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2017] [Accepted: 05/29/2018] [Indexed: 01/05/2023] Open
Abstract
While erythropoietin (EPO) constitutes the major treatment for anemia, a range of anemic disorders remain resistant to EPO treatment. The need for alternative therapeutic strategies requires the identification of mechanisms that physiologically restrain erythropoiesis. Here we show that P38α restrains erythropoiesis in mouse and human erythroblasts independently of EPO by integrating apoptotic signals during recovery from anemia. P38α deficiency promotes JNK activation through increased expression of Map3k4 via a negative feedback mechanism. JNK prevents Cdk1-mediated phosphorylation and subsequent degradation by Smurf2 of the epigenetic silencer Ezh2. Stabilized Ezh2 silences Bim expression and protects erythroblasts from apoptosis. Thus, we identify P38α/JNK signaling as a molecular brake modulating erythropoiesis through epigenetic silencing of Bim. We propose that inhibition of P38α, by enhancing erythropoiesis in an EPO-independent fashion, may provide an alternative strategy for the treatment of anemia. Erythropoietin (EPO) stimulates erythropoiesis and is commonly used to treat anemia. Here Hu et al. find that P38α/JNK signaling restrains erythropoiesis independently of EPO by regulating epigenetic silencing of the proapoptotic protein Bim, and thus identify putative targets for the treatment of anemic disorders resistant to EPO.
Collapse
Affiliation(s)
- Ping Hu
- Department of Pediatrics, Herman B Wells Center for Pediatric Research, Indiana University School of Medicine, Indianapolis, Indiana, 46202, USA
| | - Angel R Nebreda
- Institute for Research in Biomedicine (IRB Barcelona). Barcelona Institute of Science and Technology, Barcelona, 08028, Spain
| | - Helmut Hanenberg
- Department of Pediatrics III, University Children's Hospital Essen, University of Duisburg-Essen, 45122, Essen, Germany
| | - Garrett H Kinnebrew
- Division of Hematology/Oncology, Department of Medicine, Indiana University School of Medicine, Indianapolis, Indiana, 46202, USA
| | - Mircea Ivan
- Division of Hematology/Oncology, Department of Medicine, Indiana University School of Medicine, Indianapolis, Indiana, 46202, USA
| | - Mervin C Yoder
- Department of Pediatrics, Herman B Wells Center for Pediatric Research, Indiana University School of Medicine, Indianapolis, Indiana, 46202, USA
| | - Marie-Dominique Filippi
- Division of Experimental Hematology and Cancer Biology, Cincinnati Children's Research Foundation, University of Cincinnati College of Medicine, Cincinnati, OH, 45229, USA
| | - Hal E Broxmeyer
- Department of Microbiology/Immunology, Indiana University School of Medicine, Indianapolis, IN, 46202, USA
| | - Reuben Kapur
- Department of Pediatrics, Herman B Wells Center for Pediatric Research, Indiana University School of Medicine, Indianapolis, Indiana, 46202, USA.
| |
Collapse
|
17
|
Li S, Cho YS, Wang B, Li S, Jiang J. Regulation of Smoothened ubiquitylation and cell surface expression through a Cul4-DDB1-Gβ E3 ubiquitin ligase complex. J Cell Sci 2018; 131:jcs.218016. [PMID: 29930086 DOI: 10.1242/jcs.218016] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2018] [Accepted: 06/15/2018] [Indexed: 12/21/2022] Open
Abstract
Hedgehog (Hh) transduces signals by promoting cell surface accumulation and activation of the G-protein-coupled receptor (GPCR)-family protein Smoothened (Smo) in Drosophila, but the molecular mechanism underlying the regulation of Smo trafficking remains poorly understood. Here, we identified the Cul4-DDB1 E3 ubiquitin ligase complex as being essential for Smo ubiquitylation and cell surface clearance. We found that the C-terminal intracellular domain of Smo recruits Cul4-DDB1 through the β subunit of trimeric G protein (Gβ), and that Cul4-DDB1-Gβ promotes the ubiquitylation of both Smo and its binding partner G-protein-coupled-receptor kinase 2 (Gprk2) and induces the internalization and degradation of Smo. Hh dissociates Cul4-DDB1 from Smo by recruiting the catalytic subunit of protein kinase A (PKA) to phosphorylate DDB1, which disrupts its interaction with Gβ. Inactivation of the Cul4-DDB1 complex resulted in elevated Smo cell surface expression, whereas an excessive amount of Cul4-DDB1 blocked Smo accumulation and attenuated Hh pathway activation. Taken together, our study identifies an E3 ubiquitin ligase complex targeting Smo for ubiquitylation and provides new insight into how Hh signaling regulates Smo trafficking and cell surface expression.
Collapse
Affiliation(s)
- Shuang Li
- Department of Molecular Biology, University of Texas Southwestern Medical Center at Dallas, Dallas, TX 75390, USA
| | - Yong Suk Cho
- Department of Molecular Biology, University of Texas Southwestern Medical Center at Dallas, Dallas, TX 75390, USA
| | - Bing Wang
- Department of Molecular Biology, University of Texas Southwestern Medical Center at Dallas, Dallas, TX 75390, USA
| | - Shuangxi Li
- Department of Molecular Biology, University of Texas Southwestern Medical Center at Dallas, Dallas, TX 75390, USA
| | - Jin Jiang
- Department of Molecular Biology, University of Texas Southwestern Medical Center at Dallas, Dallas, TX 75390, USA .,Department of Pharmacology, University of Texas Southwestern Medical Center at Dallas, Dallas, TX 75390, USA
| |
Collapse
|
18
|
Pasquier F, Marty C, Balligand T, Verdier F, Grosjean S, Gryshkova V, Raslova H, Constantinescu SN, Casadevall N, Vainchenker W, Bellanné-Chantelot C, Plo I. New pathogenic mechanisms induced by germline erythropoietin receptor mutations in primary erythrocytosis. Haematologica 2017; 103:575-586. [PMID: 29269524 PMCID: PMC5865417 DOI: 10.3324/haematol.2017.176370] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2017] [Accepted: 12/21/2017] [Indexed: 12/19/2022] Open
Abstract
Primary familial and congenital polycythemia is characterized by erythropoietin hypersensitivity of erythroid progenitors due to germline nonsense or frameshift mutations in the erythropoietin receptor gene. All mutations so far described lead to the truncation of the C-terminal receptor sequence that contains negative regulatory domains. Their removal is presented as sufficient to cause the erythropoietin hypersensitivity phenotype. Here we provide evidence for a new mechanism whereby the presence of novel sequences generated by frameshift mutations is required for the phenotype rather than just extensive truncation resulting from nonsense mutations. We show that the erythropoietin hypersensitivity induced by a new erythropoietin receptor mutant, p.Gln434Profs*11, could not be explained by the loss of negative signaling and of the internalization domains, but rather by the appearance of a new C-terminal tail. The latter, by increasing erythropoietin receptor dimerization, stability and cell-surface localization, causes pre-activation of erythropoietin receptor and JAK2, constitutive signaling and hypersensitivity to erythropoietin. Similar results were obtained with another mutant, p.Pro438Metfs*6, which shares the same last five amino acid residues (MDTVP) with erythropoietin receptor p.Gln434Profs*11, confirming the involvement of the new peptide sequence in the erythropoietin hypersensitivity phenotype. These results suggest a new mechanism that might be common to erythropoietin receptor frameshift mutations. In summary, we show that primary familial and congenital polycythemia is more complex than expected since distinct mechanisms are involved in the erythropoietin hypersensitivity phenotype, according to the type of erythropoietin receptor mutation.
Collapse
Affiliation(s)
- Florence Pasquier
- INSERM, UMR 1170, Gustave Roussy, Laboratoire d'Excellence GR-Ex, Villejuif, France.,Université Paris-Sud, UMR 1170, Gustave Roussy, Villejuif, France.,Service d'Hématologie, Département d'Oncologie Médicale, Gustave Roussy, Villejuif, France.,Laboratoire d'Excellence GR-Ex, Paris, France
| | - Caroline Marty
- INSERM, UMR 1170, Gustave Roussy, Laboratoire d'Excellence GR-Ex, Villejuif, France.,Université Paris-Sud, UMR 1170, Gustave Roussy, Villejuif, France.,Laboratoire d'Excellence GR-Ex, Paris, France
| | - Thomas Balligand
- Ludwig Institute for Cancer Research, and Université Catholique de Louvain, de Duve Institute, Brussels, Belgium
| | - Frédérique Verdier
- Laboratoire d'Excellence GR-Ex, Paris, France.,INSERM U1016, Institut Cochin, CNRS UMR8104, Université Paris Descartes, France
| | - Sarah Grosjean
- INSERM, UMR 1170, Gustave Roussy, Laboratoire d'Excellence GR-Ex, Villejuif, France.,Université Paris-Sud, UMR 1170, Gustave Roussy, Villejuif, France.,Laboratoire d'Excellence GR-Ex, Paris, France
| | - Vitalina Gryshkova
- Ludwig Institute for Cancer Research, and Université Catholique de Louvain, de Duve Institute, Brussels, Belgium
| | - Hana Raslova
- INSERM, UMR 1170, Gustave Roussy, Laboratoire d'Excellence GR-Ex, Villejuif, France.,Université Paris-Sud, UMR 1170, Gustave Roussy, Villejuif, France.,Laboratoire d'Excellence GR-Ex, Paris, France
| | - Stefan N Constantinescu
- Ludwig Institute for Cancer Research, and Université Catholique de Louvain, de Duve Institute, Brussels, Belgium
| | - Nicole Casadevall
- INSERM, UMR 1170, Gustave Roussy, Laboratoire d'Excellence GR-Ex, Villejuif, France.,Laboratoire d'Hématologie, Hôpital Saint Antoine, Assistance Publique Hôpitaux de Paris, France
| | - William Vainchenker
- INSERM, UMR 1170, Gustave Roussy, Laboratoire d'Excellence GR-Ex, Villejuif, France.,Université Paris-Sud, UMR 1170, Gustave Roussy, Villejuif, France.,Laboratoire d'Excellence GR-Ex, Paris, France
| | - Christine Bellanné-Chantelot
- INSERM, UMR 1170, Gustave Roussy, Laboratoire d'Excellence GR-Ex, Villejuif, France .,Département de Génétique, Hôpital Universitaire Pitié-Salpêtrière, Assistance Publique Hôpitaux de Paris, France
| | - Isabelle Plo
- INSERM, UMR 1170, Gustave Roussy, Laboratoire d'Excellence GR-Ex, Villejuif, France .,Université Paris-Sud, UMR 1170, Gustave Roussy, Villejuif, France.,Laboratoire d'Excellence GR-Ex, Paris, France
| |
Collapse
|
19
|
Gilboa D, Haim-Ohana Y, Deshet-Unger N, Ben-Califa N, Hiram-Bab S, Reuveni D, Zigmond E, Gassmann M, Gabet Y, Varol C, Neumann D. Erythropoietin enhances Kupffer cell number and activity in the challenged liver. Sci Rep 2017; 7:10379. [PMID: 28871174 PMCID: PMC5583293 DOI: 10.1038/s41598-017-11082-7] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2017] [Accepted: 08/15/2017] [Indexed: 02/07/2023] Open
Abstract
Erythropoietin (EPO) is the main hormone driving mammalian erythropoiesis, with activity mediated via the surface receptor, EPO-R, on erythroid progenitor cells. Recombinant human EPO is currently used clinically for the treatment of anemia in patients with end-stage renal disease, and in certain cancer patients suffering from anemia induced either by the tumor itself or by chemotherapy. EPO-R expression is also detected in non-erythroid cells, including macrophages present in the peritoneum, spleen, and bone marrow (BM). Here we demonstrate that Kupffer cells (KCs) - the liver-resident macrophages - are EPO targets. We show that, in vitro, EPO initiated intracellular signalling and enhanced phagocytosis in a rat KC line (RKC-2) and in sorted KCs. Moreover, continuous EPO administration in mice, resulted in an increased number of KCs, up-regulation of liver EPO-R expression and elevated production of the monocyte chemoattractant CCL2, with corresponding egress of Ly6Chi monocytes from the BM. In a model of acute acetaminophen-induced liver injury, EPO administration increased the recruitment of Ly6Chi monocytes and neutrophils to the liver. Taken together, our results reveal a new role for EPO in stimulating KC proliferation and phagocytosis, and in recruiting Ly6Chi monocytes in response to liver injury.
Collapse
Affiliation(s)
- Dafna Gilboa
- Department of Cell and Developmental Biology, Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel
| | - Yasmin Haim-Ohana
- Department of Cell and Developmental Biology, Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel
| | - Naamit Deshet-Unger
- Department of Cell and Developmental Biology, Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel
| | - Nathalie Ben-Califa
- Department of Cell and Developmental Biology, Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel
| | - Sahar Hiram-Bab
- Department of Anatomy and Anthropology, Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel
| | - Debby Reuveni
- The Research Center for Digestive Tract and Liver Diseases, Sourasky Medical Center and Department of Clinical Microbiology and Immunology, Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel
| | - Ehud Zigmond
- The Research Center for Digestive Tract and Liver Diseases, Sourasky Medical Center and Department of Clinical Microbiology and Immunology, Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel
| | - Max Gassmann
- Institute for Veterinary Physiology, Vetsuisse Faculty and Zurich Center for Integrative Human Physiology (ZIHP), University of Zurich, Zurich, Switzerland
| | - Yankel Gabet
- Department of Anatomy and Anthropology, Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel
| | - Chen Varol
- The Research Center for Digestive Tract and Liver Diseases, Sourasky Medical Center and Department of Clinical Microbiology and Immunology, Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel
| | - Drorit Neumann
- Department of Cell and Developmental Biology, Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel.
| |
Collapse
|
20
|
Kuo T, Chen TC, Lee RA, Nguyen NHT, Broughton AE, Zhang D, Wang JC. Pik3r1 Is Required for Glucocorticoid-Induced Perilipin 1 Phosphorylation in Lipid Droplet for Adipocyte Lipolysis. Diabetes 2017; 66:1601-1610. [PMID: 28292967 PMCID: PMC5440017 DOI: 10.2337/db16-0831] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/07/2016] [Accepted: 03/09/2017] [Indexed: 12/26/2022]
Abstract
Glucocorticoids promote lipolysis in white adipose tissue (WAT) to adapt to energy demands under stress, whereas superfluous lipolysis causes metabolic disorders, including dyslipidemia and hepatic steatosis. Glucocorticoid-induced lipolysis requires the phosphorylation of cytosolic hormone-sensitive lipase (HSL) and perilipin 1 (Plin1) in the lipid droplet by protein kinase A (PKA). We previously identified Pik3r1 (also called p85α) as a glucocorticoid receptor target gene. Here, we found that glucocorticoids increased HSL phosphorylation, but not Plin1 phosphorylation, in adipose tissue-specific Pik3r1-null (AKO) mice. Furthermore, in lipid droplets, the phosphorylation of HSL and Plin1 and the levels of catalytic and regulatory subunits of PKA were increased by glucocorticoids in wild-type mice. However, these effects were attenuated in AKO mice. In agreement with reduced WAT lipolysis, glucocorticoid- initiated hepatic steatosis and hypertriglyceridemia were improved in AKO mice. Our data demonstrated a novel role of Pik3r1 that was independent of the regulatory function of phosphoinositide 3-kinase in mediating the metabolic action of glucocorticoids. Thus, the inhibition of Pik3r1 in adipocytes could alleviate lipid disorders caused by excess glucocorticoid exposure.
Collapse
Affiliation(s)
- Taiyi Kuo
- Endocrinology Graduate Program, University of California, Berkeley, Berkeley, CA
- Department of Nutritional Sciences and Toxicology, University of California, Berkeley, Berkeley, CA
| | - Tzu-Chieh Chen
- Department of Nutritional Sciences and Toxicology, University of California, Berkeley, Berkeley, CA
- Metabolic Biology Graduate Program, University of California, Berkeley, Berkeley, CA
| | - Rebecca A Lee
- Endocrinology Graduate Program, University of California, Berkeley, Berkeley, CA
- Department of Nutritional Sciences and Toxicology, University of California, Berkeley, Berkeley, CA
| | - Nguyen Huynh Thao Nguyen
- Department of Nutritional Sciences and Toxicology, University of California, Berkeley, Berkeley, CA
| | - Augusta E Broughton
- Department of Nutritional Sciences and Toxicology, University of California, Berkeley, Berkeley, CA
| | - Danyun Zhang
- Department of Nutritional Sciences and Toxicology, University of California, Berkeley, Berkeley, CA
| | - Jen-Chywan Wang
- Endocrinology Graduate Program, University of California, Berkeley, Berkeley, CA
- Department of Nutritional Sciences and Toxicology, University of California, Berkeley, Berkeley, CA
- Metabolic Biology Graduate Program, University of California, Berkeley, Berkeley, CA
| |
Collapse
|
21
|
Abstract
Compelling evidence have demonstrated that bulk tumors can arise from a unique subset of cells commonly termed "cancer stem cells" that has been proposed to be a strong driving force of tumorigenesis and a key mechanism of therapeutic resistance. Recent advances in epigenomics have illuminated key mechanisms by which epigenetic regulation contribute to cancer progression. In this review, we present a discussion of how deregulation of various epigenetic pathways can contribute to cancer initiation and tumorigenesis, particularly with respect to maintenance and survival of cancer stem cells. This information, together with several promising clinical and preclinical trials of epigenetic modulating drugs, offer new possibilities for targeting cancer stem cells as well as improving cancer therapy overall.
Collapse
Affiliation(s)
- Tan Boon Toh
- Cancer Science Institute of Singapore, National University of Singapore, Singapore, Singapore
| | - Jhin Jieh Lim
- Cancer Science Institute of Singapore, National University of Singapore, Singapore, Singapore
| | - Edward Kai-Hua Chow
- Cancer Science Institute of Singapore, National University of Singapore, Singapore, Singapore
- Department of Pharmacology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore
- Centre for Translational Medicine, National University of Singapore, 14 Medical Drive #12-01, Singapore, 117599 Singapore
| |
Collapse
|
22
|
Chen PH, Yao H, Huang LJS. Cytokine Receptor Endocytosis: New Kinase Activity-Dependent and -Independent Roles of PI3K. Front Endocrinol (Lausanne) 2017; 8:78. [PMID: 28507533 PMCID: PMC5410625 DOI: 10.3389/fendo.2017.00078] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/30/2017] [Accepted: 03/30/2017] [Indexed: 12/14/2022] Open
Abstract
Type I and II cytokine receptors are cell surface sensors that bind cytokines in the extracellular environment and initiate intracellular signaling to control processes such as hematopoiesis, immune function, and cellular growth and development. One key mechanism that regulates signaling from cytokine receptors is through receptor endocytosis. In this mini-review, we describe recent advances in endocytic regulations of cytokine receptors, focusing on new paradigms by which PI3K controls receptor endocytosis through both kinase activity-dependent and -independent mechanisms. These advances underscore the notion that the p85 regulatory subunit of PI3K has functions beyond regulating PI3K kinase activity, and that PI3K plays both positive and negative roles in receptor signaling. On the one hand, the PI3K/Akt pathway controls various aspects downstream of cytokine receptors. On the other hand, it stimulates receptor endocytosis and downregulation, thus contributing to signaling attenuation.
Collapse
Affiliation(s)
- Ping-hung Chen
- Department of Cell Biology, University of Texas Southwestern Medical Center, Dallas, TX, USA
| | - Huiyu Yao
- Department of Cell Biology, University of Texas Southwestern Medical Center, Dallas, TX, USA
| | - Lily Jun-shen Huang
- Department of Cell Biology, University of Texas Southwestern Medical Center, Dallas, TX, USA
- *Correspondence: Lily Jun-shen Huang,
| |
Collapse
|
23
|
Girnita L, Takahashi SI, Crudden C, Fukushima T, Worrall C, Furuta H, Yoshihara H, Hakuno F, Girnita A. Chapter Seven - When Phosphorylation Encounters Ubiquitination: A Balanced Perspective on IGF-1R Signaling. PROGRESS IN MOLECULAR BIOLOGY AND TRANSLATIONAL SCIENCE 2016; 141:277-311. [PMID: 27378760 DOI: 10.1016/bs.pmbts.2016.04.001] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Cell-surface receptors govern the critical information passage from outside to inside the cell and hence control important cellular decisions such as survival, growth, and differentiation. These receptors, structurally grouped into different families, utilize common intracellular signaling-proteins and pathways, yet promote divergent biological consequences. In rapid processing of extracellular signals to biological outcomes, posttranslational modifications offer a repertoire of protein processing options. Protein ubiquitination was originally identified as a signal for protein degradation through the proteasome system. It is now becoming increasingly recognized that both ubiquitin and ubiquitin-like proteins, all evolved from a common ubiquitin structural superfold, are used extensively by the cell and encompass signal tags for many different cellular fates. In this chapter we examine the current understanding of the ubiquitin regulation surrounding the insulin-like growth factor and insulin signaling systems, major members of the larger family of receptor tyrosine kinases (RTKs) and key regulators of fundamental physiological and pathological states.
Collapse
Affiliation(s)
- L Girnita
- Department of Oncology and Pathology, Cancer Center Karolinska, Karolinska Institutet and Karolinska University Hospital, Stockholm, Sweden.
| | - S-I Takahashi
- Departments of Animal Sciences and Applied Biological Chemistry, Graduate School of Agriculture and Life Sciences, The University of Tokyo, Tokyo, Japan
| | - C Crudden
- Department of Oncology and Pathology, Cancer Center Karolinska, Karolinska Institutet and Karolinska University Hospital, Stockholm, Sweden
| | - T Fukushima
- Departments of Animal Sciences and Applied Biological Chemistry, Graduate School of Agriculture and Life Sciences, The University of Tokyo, Tokyo, Japan; Department of Biological Sciences, Faculty of Bioscience and Biotechnology, Tokyo Institute of Technology, Kanagawa, Japan
| | - C Worrall
- Department of Oncology and Pathology, Cancer Center Karolinska, Karolinska Institutet and Karolinska University Hospital, Stockholm, Sweden
| | - H Furuta
- Departments of Animal Sciences and Applied Biological Chemistry, Graduate School of Agriculture and Life Sciences, The University of Tokyo, Tokyo, Japan
| | - H Yoshihara
- Departments of Animal Sciences and Applied Biological Chemistry, Graduate School of Agriculture and Life Sciences, The University of Tokyo, Tokyo, Japan
| | - F Hakuno
- Departments of Animal Sciences and Applied Biological Chemistry, Graduate School of Agriculture and Life Sciences, The University of Tokyo, Tokyo, Japan
| | - A Girnita
- Department of Oncology and Pathology, Cancer Center Karolinska, Karolinska Institutet and Karolinska University Hospital, Stockholm, Sweden; Dermatology Department, Karolinska University Hospital, Stockholm, Sweden
| |
Collapse
|
24
|
Iacobucci I, Li Y, Roberts KG, Dobson SM, Kim JC, Payne-Turner D, Harvey RC, Valentine M, McCastlain K, Easton J, Yergeau D, Janke LJ, Shao Y, Chen IML, Rusch M, Zandi S, Kornblau SM, Konopleva M, Jabbour E, Paietta EM, Rowe JM, Pui CH, Gastier-Foster J, Gu Z, Reshmi S, Loh ML, Racevskis J, Tallman MS, Wiernik PH, Litzow MR, Willman CL, McPherson JD, Downing JR, Zhang J, Dick JE, Hunger SP, Mullighan CG. Truncating Erythropoietin Receptor Rearrangements in Acute Lymphoblastic Leukemia. Cancer Cell 2016; 29:186-200. [PMID: 26859458 PMCID: PMC4750652 DOI: 10.1016/j.ccell.2015.12.013] [Citation(s) in RCA: 93] [Impact Index Per Article: 11.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/18/2015] [Revised: 11/17/2015] [Accepted: 12/23/2015] [Indexed: 11/16/2022]
Abstract
Chromosomal rearrangements are a hallmark of acute lymphoblastic leukemia (ALL) and are important ALL initiating events. We describe four different rearrangements of the erythropoietin receptor gene EPOR in Philadelphia chromosome-like (Ph-like) ALL. All of these rearrangements result in truncation of the cytoplasmic tail of EPOR at residues similar to those mutated in primary familial congenital polycythemia, with preservation of the proximal tyrosine essential for receptor activation and loss of distal regulatory residues. This resulted in deregulated EPOR expression, hypersensitivity to erythropoietin stimulation, and heightened JAK-STAT activation. Expression of truncated EPOR in mouse B cell progenitors induced ALL in vivo. Human leukemic cells with EPOR rearrangements were sensitive to JAK-STAT inhibition, suggesting a therapeutic option in high-risk ALL.
Collapse
Affiliation(s)
- Ilaria Iacobucci
- Department of Pathology, St. Jude Children's Research Hospital, Memphis, TN 38105, USA
| | - Yongjin Li
- Department of Computational Biology, St. Jude Children's Research Hospital, Memphis, TN 38105, USA
| | - Kathryn G Roberts
- Department of Pathology, St. Jude Children's Research Hospital, Memphis, TN 38105, USA
| | - Stephanie M Dobson
- Princess Margaret Cancer Centre, University Health Network and Department of Molecular Genetics, University of Toronto, Toronto, ON M5G 1L7, Canada
| | - Jaeseung C Kim
- Department of Medical Biophysics, University of Toronto, Toronto, ON M5G 2M9, Canada; Ontario Institute for Cancer Research, Toronto, ON M5G 0A3, Canada
| | - Debbie Payne-Turner
- Department of Pathology, St. Jude Children's Research Hospital, Memphis, TN 38105, USA
| | - Richard C Harvey
- University of New Mexico Cancer Research and Treatment Center, Albuquerque, NM 87106, USA
| | - Marcus Valentine
- Cytogenetics Shared Resource, St. Jude Children's Research Hospital, Memphis, TN 38105, USA
| | - Kelly McCastlain
- Department of Pathology, St. Jude Children's Research Hospital, Memphis, TN 38105, USA
| | - John Easton
- Department of Computational Biology, St. Jude Children's Research Hospital, Memphis, TN 38105, USA
| | - Donald Yergeau
- Department of Computational Biology, St. Jude Children's Research Hospital, Memphis, TN 38105, USA
| | - Laura J Janke
- Department of Pathology, St. Jude Children's Research Hospital, Memphis, TN 38105, USA
| | - Ying Shao
- Department of Pathology, St. Jude Children's Research Hospital, Memphis, TN 38105, USA; Department of Computational Biology, St. Jude Children's Research Hospital, Memphis, TN 38105, USA
| | - I-Ming L Chen
- University of New Mexico Cancer Research and Treatment Center, Albuquerque, NM 87106, USA
| | - Michael Rusch
- Department of Computational Biology, St. Jude Children's Research Hospital, Memphis, TN 38105, USA
| | - Sasan Zandi
- Princess Margaret Cancer Centre, University Health Network and Department of Molecular Genetics, University of Toronto, Toronto, ON M5G 1L7, Canada
| | - Steven M Kornblau
- Department of Leukemia, The University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA
| | - Marina Konopleva
- Department of Leukemia, The University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA
| | - Elias Jabbour
- Department of Leukemia, The University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA
| | | | - Jacob M Rowe
- Department of Hematology, Shaare Zedek Medicak Center, Jerusalem 910310, Israel
| | - Ching-Hon Pui
- Department of Oncology, St. Jude Children's Research Hospital, Memphis, TN 38105, USA
| | - Julie Gastier-Foster
- The Research Institute at Nationwide Children's Hospital, Columbus, OH 43205, USA
| | - Zhaohui Gu
- Department of Pathology, St. Jude Children's Research Hospital, Memphis, TN 38105, USA
| | - Shalini Reshmi
- The Research Institute at Nationwide Children's Hospital, Columbus, OH 43205, USA
| | - Mignon L Loh
- Department of Pediatrics and the Helen Diller Family Cancer Center, University of California, San Francisco, CA 94115, USA
| | - Janis Racevskis
- Department of Leukemia, The University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA
| | - Martin S Tallman
- Leukemia Service, Department of Medicine, Memorial Sloan-Kettering Cancer Center, New York, NY 10065, USA
| | - Peter H Wiernik
- Cancer Research Foundation of New York, Bronx, NY 10514, USA
| | - Mark R Litzow
- Division of Hematology, Mayo Clinic, Rochester, MN 55905, USA
| | - Cheryl L Willman
- University of New Mexico Cancer Research and Treatment Center, Albuquerque, NM 87106, USA
| | - John D McPherson
- Department of Biochemistry and Molecular Medicine, UC Davis Comprehensive Cancer Center, Sacramento, CA 95817, USA
| | - James R Downing
- Department of Pathology, St. Jude Children's Research Hospital, Memphis, TN 38105, USA
| | - Jinghui Zhang
- Department of Computational Biology, St. Jude Children's Research Hospital, Memphis, TN 38105, USA
| | - John E Dick
- Princess Margaret Cancer Centre, University Health Network and Department of Molecular Genetics, University of Toronto, Toronto, ON M5G 1L7, Canada
| | - Stephen P Hunger
- Department of Pediatrics and Center for Childhood Cancer Research, The Children's Hospital of Philadelphia, Philadelphia, PA 19104, USA
| | - Charles G Mullighan
- Department of Pathology, St. Jude Children's Research Hospital, Memphis, TN 38105, USA.
| |
Collapse
|
25
|
Chauveau A, Luque Paz D, Lecucq L, Le Gac G, Le Maréchal C, Gueguen P, Berthou C, Ugo V. A new point mutation in EPOR inducing a short deletion in congenital erythrocytosis. Br J Haematol 2015; 172:475-7. [PMID: 26010769 DOI: 10.1111/bjh.13511] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Affiliation(s)
- Aurélie Chauveau
- CHU Brest, Laboratoire d'Hématologie, Brest, France.,Université de Brest, UFR Médecine, Brest, France.,INSERM U1078, Brest, France
| | - Damien Luque Paz
- CHU Brest, Laboratoire d'Hématologie, Brest, France.,INSERM U1078, Brest, France
| | - Lydie Lecucq
- CHU Brest, Laboratoire d'Hématologie, Brest, France.,Plateforme INCa de Génétique Hospitalière des Cancers de Brest, Brest, France
| | - Gérald Le Gac
- Université de Brest, UFR Médecine, Brest, France.,INSERM U1078, Brest, France.,CHU Brest, Laboratoire de Génétique, Brest, France
| | - Cédric Le Maréchal
- Université de Brest, UFR Médecine, Brest, France.,INSERM U1078, Brest, France.,CHU Brest, Laboratoire de Génétique, Brest, France
| | - Paul Gueguen
- Université de Brest, UFR Médecine, Brest, France.,INSERM U1078, Brest, France.,CHU Brest, Laboratoire de Génétique, Brest, France
| | - Christian Berthou
- Université de Brest, UFR Médecine, Brest, France.,CHU Brest, Service d'Hématologie, Institut de Cancérologie et d'Hématologie, Brest, France
| | - Valérie Ugo
- CHU Brest, Laboratoire d'Hématologie, Brest, France. .,Université de Brest, UFR Médecine, Brest, France. .,INSERM U1078, Brest, France.
| |
Collapse
|
26
|
Emerging EPO and EPO receptor regulators and signal transducers. Blood 2015; 125:3536-41. [PMID: 25887776 DOI: 10.1182/blood-2014-11-575357] [Citation(s) in RCA: 117] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2014] [Accepted: 04/13/2015] [Indexed: 12/13/2022] Open
Abstract
As essential mediators of red cell production, erythropoietin (EPO) and its cell surface receptor (EPO receptor [EPOR]) have been intensely studied. Early investigations defined basic mechanisms for hypoxia-inducible factor induction of EPO expression, and within erythroid progenitors EPOR engagement of canonical Janus kinase 2/signal transducer and activator of transcription 5 (JAK2/STAT5), rat sarcoma/mitogen-activated protein kinase/extracellular signal-regulated kinase (RAS/MEK/ERK), and phosphatidylinositol 3-kinase (PI3K) pathways. Contemporary genetic, bioinformatic, and proteomic approaches continue to uncover new clinically relevant modulators of EPO and EPOR expression, and EPO's biological effects. This Spotlight review highlights such factors and their emerging roles during erythropoiesis and anemia.
Collapse
|
27
|
Shintani T, Ohara-Waki F, Kitanaka A, Tanaka T, Kubota Y. Cbl negatively regulates erythropoietin-induced growth and survival signaling through the proteasomal degradation of Src kinase. Blood Cells Mol Dis 2014; 53:211-8. [PMID: 25084697 DOI: 10.1016/j.bcmd.2014.06.005] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2014] [Accepted: 06/30/2014] [Indexed: 12/12/2022]
Abstract
We examined the biological functions of the gene Cbl in erythropoietin (EPO) signaling using Cbl-deficient F-36P human erythroleukemia cells by the introduction of the Cbl siRNA expression vector. Knockdown of Cbl promoted EPO-dependent proliferation and survival of F-36P cells, especially at a low concentration of EPO (0.01U/mL), similar to serum concentrations of EPO in healthy volunteers (0.005-0.04U/mL). We found that Src was degraded mainly by the proteasomal pathway because the proteasome inhibitor MG-132 but not the lysosome inhibitor NH4Cl suppressed the EPO-induced degradation of Src in F-36P cells and that knockdown of Cbl inhibited EPO-induced ubiquitination and degradation of Src in F-36P cells. The experiments using the Src inhibitor PP1 and co-expression experiments further confirmed that Cbl and the kinase activity of Src are required for the EPO-induced ubiquitination of Src. In addition, the co-expression experiments and in vitro kinase assay demonstrated that the EPO-induced tyrosine phosphorylation and ubiquitination of Cbl were dependent on the kinase activity of Src but not Jak2. Thus, Cbl negatively regulates EPO signaling mainly through the proteasome-dependent degradation of Src, and the E3 ligase activity of Cbl and its tyrosine phosphorylation are regulated by Src but not Jak2.
Collapse
Affiliation(s)
- Takamichi Shintani
- Department of Community Medicine, Faculty of Medicine, Kagawa University, Kagawa 761-0793, Japan
| | - Fusako Ohara-Waki
- Department of Internal Medicine, Takamatsu Red Cross Hospital, Kagawa 760-0017, Japan
| | - Akira Kitanaka
- Department of Gastroenterology and Hematology, Faculty of Medicine, University of Miyazaki, Miyazaki 889-1692, Japan
| | - Terukazu Tanaka
- Faculty of Medicine, Kagawa University, Kagawa 761-0793, Japan
| | - Yoshitsugu Kubota
- Department of Community Medicine, Faculty of Medicine, Kagawa University, Kagawa 761-0793, Japan.
| |
Collapse
|
28
|
Abstract
In this issue of Blood, Goodwin et al investigate the pathogenesis of juvenile myelomonocytic leukemia (JMML), demonstrating that mutant Shp2 induces granulocyte macrophage-colony-stimulating factor (GM-CSF) hypersensitivity and that the p110δ subunit of phosphatidylinositol 3-kinase (PI3K) further promotes this dysregulation
Collapse
|