1
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Piszczatowski RT, Bülow HE, Steidl U. Heparan sulfates and heparan sulfate proteoglycans in hematopoiesis. Blood 2024; 143:2571-2587. [PMID: 38639475 DOI: 10.1182/blood.2023022736] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2023] [Revised: 03/13/2024] [Accepted: 03/14/2024] [Indexed: 04/20/2024] Open
Abstract
ABSTRACT From signaling mediators in stem cells to markers of differentiation and lineage commitment to facilitators for the entry of viruses, such as HIV-1, cell surface heparan sulfate (HS) glycans with distinct modification patterns play important roles in hematopoietic biology. In this review, we provide an overview of the importance of HS and the proteoglycans (HSPGs) to which they are attached within the major cellular subtypes of the hematopoietic system. We summarize the roles of HSPGs, HS, and HS modifications within each main hematopoietic cell lineage of both myeloid and lymphoid arms. Lastly, we discuss the biological advances in the detection of HS modifications and their potential to further discriminate cell types within hematopoietic tissue.
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Affiliation(s)
- Richard T Piszczatowski
- Department of Cell Biology, Albert Einstein College of Medicine, Bronx, NY
- Department of Pediatrics, Weill Cornell Medicine, New York Presbyterian Hospital, New York, NY
| | - Hannes E Bülow
- Department of Genetics, Albert Einstein College of Medicine, Bronx, NY
- Dominick P. Purpura Department of Neuroscience, Albert Einstein College of Medicine, Bronx, NY
- Montefiore Einstein Comprehensive Cancer Center, Albert Einstein College of Medicine-Montefiore Health System, Bronx, NY
| | - Ulrich Steidl
- Department of Cell Biology, Albert Einstein College of Medicine, Bronx, NY
- Montefiore Einstein Comprehensive Cancer Center, Albert Einstein College of Medicine-Montefiore Health System, Bronx, NY
- Departments of Oncology, Albert Einstein College of Medicine-Montefiore Health System, Bronx, NY
- Blood Cancer Institute, Albert Einstein College of Medicine, Bronx, NY
- Ruth L. and David S. Gottesman Institute for Stem Cell Research and Regenerative Medicine, Albert Einstein College of Medicine, Bronx, NY
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2
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Kasper MM, Ellenbogen B, Li Y, Schmidt CE. Temporal characterization of hyaluronidases after peripheral nerve injury. PLoS One 2023; 18:e0289956. [PMID: 37616240 PMCID: PMC10449126 DOI: 10.1371/journal.pone.0289956] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2022] [Accepted: 07/28/2023] [Indexed: 08/26/2023] Open
Abstract
Hyaluronic acid (HA) is ubiquitously found in biological tissues and mediates wound healing mechanisms after injury by promoting cell migration and proliferation. With the development of tissue-engineered neural therapeutics, including off-the-shelf grafts for peripheral nerve repair, HA is an attractive material for clinical use because of its various biological roles. HA-based biomaterials have been carefully engineered to elicit specific in vivo host responses, however an important design feature that should be considered in these scaffolds is endogenous degradation. Hyaluronidases (HYALs) are the complementary enzymes that are responsible for HA turnover. Although HYAL expression has been widely characterized in various tissues, including the central nervous system, and for different pathologies, there remains a lack of knowledge of HYAL mediated turnover in peripheral nerve tissue. In this work, gene expression of two hyaluronidases, HYAL1 and HYAL2, and HA-binding receptor, CD44, were studied in two injury models: rat sciatic nerve crush and critical gap transection. HYAL2 and CD44 were shown to be upregulated 3 days after crush injury, whereas HYAL1 was upregulated at 3 weeks, which collectively demonstrate temporal patterning of HA breakdown. Additionally, differences were observed between HYAL and HA expression at 3 weeks when compared for both nerve injury models. The activity of HYAL in peripheral nerve tissue was determined to be approximately 0.11 μmol/min, which could be used to further model HA-based biomaterial breakdown for peripheral nerve applications. Overall, this work provides a landscape of HA turnover in peripheral nerve that can be used for future neural applications.
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Affiliation(s)
- Mary M. Kasper
- J. Crayton Pruitt Department of Biomedical Engineering, University of Florida, Gainesville, FL, United States of America
| | - Bret Ellenbogen
- Department of Chemistry, University of Florida, Gainesville, FL, United States of America
| | - Yuan Li
- J. Crayton Pruitt Department of Biomedical Engineering, University of Florida, Gainesville, FL, United States of America
| | - Christine E. Schmidt
- J. Crayton Pruitt Department of Biomedical Engineering, University of Florida, Gainesville, FL, United States of America
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3
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Liao C, Wang Q, An J, Chen J, Li X, Long Q, Xiao L, Guan X, Liu J. CD44 Glycosylation as a Therapeutic Target in Oncology. Front Oncol 2022; 12:883831. [PMID: 35936713 PMCID: PMC9351704 DOI: 10.3389/fonc.2022.883831] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2022] [Accepted: 06/10/2022] [Indexed: 11/27/2022] Open
Abstract
The interaction of non-kinase transmembrane glycoprotein CD44 with ligands including hyaluronic acid (HA) is closely related to the occurrence and development of tumors. Changes in CD44 glycosylation can regulate its binding to HA, Siglec-15, fibronectin, TM4SF5, PRG4, FGF2, collagen and podoplanin and activate or inhibit c-Src/STAT3/Twist1/Bmi1, PI3K/AKT/mTOR, ERK/NF-κB/NANOG and other signaling pathways, thereby having a profound impact on the tumor microenvironment and tumor cell fate. However, the glycosylation of CD44 is complex and largely unknown, and the current understanding of how CD44 glycosylation affects tumors is limited. These issues must be addressed before targeted CD44 glycosylation can be applied to treat human cancers.
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Affiliation(s)
- Chengcheng Liao
- Department of Orthodontics II, Affiliated Stomatological Hospital of Zunyi Medical University, Zunyi, China
- Oral Disease Research Key Laboratory of Guizhou Tertiary Institution, School of Stomatology, Zunyi Medical University, Zunyi, China
| | - Qian Wang
- Oral Disease Research Key Laboratory of Guizhou Tertiary Institution, School of Stomatology, Zunyi Medical University, Zunyi, China
- Microbial Resources and Drug Development Key Laboratory of Guizhou Tertiary Institution, Life Sciences Institute, Zunyi Medical University, Zunyi, China
| | - Jiaxing An
- Department of Gastroenterology, Affiliated Hospital of Zunyi Medical University, Zunyi, China
| | - Jie Chen
- Department of Urology, The Third Affiliated Hospital of Zunyi Medical University, Zunyi, China
| | - Xiaolan Li
- Oral Disease Research Key Laboratory of Guizhou Tertiary Institution, School of Stomatology, Zunyi Medical University, Zunyi, China
- Microbial Resources and Drug Development Key Laboratory of Guizhou Tertiary Institution, Life Sciences Institute, Zunyi Medical University, Zunyi, China
| | - Qian Long
- Department of Orthodontics II, Affiliated Stomatological Hospital of Zunyi Medical University, Zunyi, China
- Oral Disease Research Key Laboratory of Guizhou Tertiary Institution, School of Stomatology, Zunyi Medical University, Zunyi, China
| | - Linlin Xiao
- Department of Orthodontics II, Affiliated Stomatological Hospital of Zunyi Medical University, Zunyi, China
- Oral Disease Research Key Laboratory of Guizhou Tertiary Institution, School of Stomatology, Zunyi Medical University, Zunyi, China
- *Correspondence: Linlin Xiao, ; Xiaoyan Guan, ; Jianguo Liu,
| | - Xiaoyan Guan
- Department of Orthodontics II, Affiliated Stomatological Hospital of Zunyi Medical University, Zunyi, China
- Oral Disease Research Key Laboratory of Guizhou Tertiary Institution, School of Stomatology, Zunyi Medical University, Zunyi, China
- *Correspondence: Linlin Xiao, ; Xiaoyan Guan, ; Jianguo Liu,
| | - Jianguo Liu
- Department of Orthodontics II, Affiliated Stomatological Hospital of Zunyi Medical University, Zunyi, China
- Oral Disease Research Key Laboratory of Guizhou Tertiary Institution, School of Stomatology, Zunyi Medical University, Zunyi, China
- *Correspondence: Linlin Xiao, ; Xiaoyan Guan, ; Jianguo Liu,
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4
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Luiz MT, Dutra JAP, Tofani LB, de Araújo JTC, Di Filippo LD, Marchetti JM, Chorilli M. Targeted Liposomes: A Nonviral Gene Delivery System for Cancer Therapy. Pharmaceutics 2022; 14:pharmaceutics14040821. [PMID: 35456655 PMCID: PMC9030342 DOI: 10.3390/pharmaceutics14040821] [Citation(s) in RCA: 17] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2022] [Revised: 04/01/2022] [Accepted: 04/05/2022] [Indexed: 12/13/2022] Open
Abstract
Cancer is the second most frequent cause of death worldwide, with 28.4 million new cases expected for 2040. Despite de advances in the treatment, it remains a challenge because of the tumor heterogenicity and the increase in multidrug resistance mechanisms. Thus, gene therapy has been a potential therapeutic approach owing to its ability to introduce, silence, or change the content of the human genetic code for inhibiting tumor progression, angiogenesis, and metastasis. For the proper delivery of genes to tumor cells, it requires the use of gene vectors for protecting the therapeutic gene and transporting it into cells. Among these vectors, liposomes have been the nonviral vector most used because of their low immunogenicity and low toxicity. Furthermore, this nanosystem can have its surface modified with ligands (e.g., antibodies, peptides, aptamers, folic acid, carbohydrates, and others) that can be recognized with high specificity and affinity by receptor overexpressed in tumor cells, increasing the selective delivery of genes to tumors. In this context, the present review address and discuss the main targeting ligands used to functionalize liposomes for improving gene delivery with potential application in cancer treatment.
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Affiliation(s)
- Marcela Tavares Luiz
- School of Pharmaceutical Science of Ribeirao Preto, University of Sao Paulo (USP), Ribeirao Preto 14040-900, Brazil; (M.T.L.); (J.M.M.)
| | - Jessyca Aparecida Paes Dutra
- School of Pharmaceutical Science, Sao Paulo State University (UNESP), Araraquara 14800-903, Brazil; (J.A.P.D.); (L.B.T.); (J.T.C.d.A.); (L.D.D.F.)
| | - Larissa Bueno Tofani
- School of Pharmaceutical Science, Sao Paulo State University (UNESP), Araraquara 14800-903, Brazil; (J.A.P.D.); (L.B.T.); (J.T.C.d.A.); (L.D.D.F.)
| | | | - Leonardo Delello Di Filippo
- School of Pharmaceutical Science, Sao Paulo State University (UNESP), Araraquara 14800-903, Brazil; (J.A.P.D.); (L.B.T.); (J.T.C.d.A.); (L.D.D.F.)
| | - Juliana Maldonado Marchetti
- School of Pharmaceutical Science of Ribeirao Preto, University of Sao Paulo (USP), Ribeirao Preto 14040-900, Brazil; (M.T.L.); (J.M.M.)
| | - Marlus Chorilli
- School of Pharmaceutical Science, Sao Paulo State University (UNESP), Araraquara 14800-903, Brazil; (J.A.P.D.); (L.B.T.); (J.T.C.d.A.); (L.D.D.F.)
- Correspondence: ; Tel./Fax: +55-16-3301-6998
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5
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Joosten SPJ, Spaargaren M, Clevers H, Pals ST. Hepatocyte growth factor/MET and CD44 in colorectal cancer: partners in tumorigenesis and therapy resistance. Biochim Biophys Acta Rev Cancer 2020; 1874:188437. [PMID: 32976979 DOI: 10.1016/j.bbcan.2020.188437] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2020] [Revised: 09/09/2020] [Accepted: 09/09/2020] [Indexed: 12/12/2022]
Abstract
Intestinal epithelial self-renewal is a tightly controlled process, which is critically dependent on WNT signalling. Aberrant activation of the WNT pathway in intestinal stem cells (ISCs) results in constitutive transcription of target genes, which collectively drive malignant transformation in colorectal cancer (CRC). However, the contribution of individual genes to intestinal homeostasis and tumorigenesis often is incompletely defined. Here, we discuss converging evidence indicating that the receptor tyrosine kinase (RTK) MET and its ligand hepatocyte growth factor (HGF) play a major role in the intestinal damage response, as well as in intestinal tumorigenesis, by controlling the proliferation, survival, motility, and stemness of normal and neoplastic intestinal epithelial cells. These activities of MET are promoted by specific CD44 isoforms expressed by ISCs. The accrued data indicate that MET and the EGFR have overlapping roles in the biology of intestinal epithelium and that metastatic CRCs can exploit this redundancy to escape from EGFR-targeted treatments, co-opting HGF/MET/CD44v signalling. Hence, targeting both pathways may be required for effective treatment of (a subset of) CRCs. The RTK identity of MET, the distinctive 'plasminogen-like' structure and activation mode of its ligand HGF, and the specific collaboration of MET with CD44, provide several unique targeting options, which merit further exploration.
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Affiliation(s)
- Sander P J Joosten
- Department of Pathology and Cancer Center Amsterdam (CCA), Amsterdam University Medical Centers, Loc. AMC, the Netherlands
| | - Marcel Spaargaren
- Department of Pathology and Cancer Center Amsterdam (CCA), Amsterdam University Medical Centers, Loc. AMC, the Netherlands
| | - Hans Clevers
- Hubrecht Institute, University of Utrecht, Utrecht, the Netherlands
| | - Steven T Pals
- Department of Pathology and Cancer Center Amsterdam (CCA), Amsterdam University Medical Centers, Loc. AMC, the Netherlands..
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6
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Heparan Sulfate Proteoglycans Biosynthesis and Post Synthesis Mechanisms Combine Few Enzymes and Few Core Proteins to Generate Extensive Structural and Functional Diversity. Molecules 2020; 25:molecules25184215. [PMID: 32937952 PMCID: PMC7570499 DOI: 10.3390/molecules25184215] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2020] [Revised: 09/08/2020] [Accepted: 09/09/2020] [Indexed: 02/06/2023] Open
Abstract
Glycosylation is a common and widespread post-translational modification that affects a large majority of proteins. Of these, a small minority, about 20, are specifically modified by the addition of heparan sulfate, a linear polysaccharide from the glycosaminoglycan family. The resulting molecules, heparan sulfate proteoglycans, nevertheless play a fundamental role in most biological functions by interacting with a myriad of proteins. This large functional repertoire stems from the ubiquitous presence of these molecules within the tissue and a tremendous structural variety of the heparan sulfate chains, generated through both biosynthesis and post synthesis mechanisms. The present review focusses on how proteoglycans are “gagosylated” and acquire structural complexity through the concerted action of Golgi-localized biosynthesis enzymes and extracellular modifying enzymes. It examines, in particular, the possibility that these enzymes form complexes of different modes of organization, leading to the synthesis of various oligosaccharide sequences.
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7
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Chen L, Fu C, Zhang Q, He C, Zhang F, Wei Q. The role of CD44 in pathological angiogenesis. FASEB J 2020; 34:13125-13139. [PMID: 32830349 DOI: 10.1096/fj.202000380rr] [Citation(s) in RCA: 48] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2020] [Revised: 07/29/2020] [Accepted: 07/31/2020] [Indexed: 02/06/2023]
Abstract
Angiogenesis is required for normal development and occurs as a pathological step in a variety of disease settings, such as cancer, ocular diseases, and ischemia. Recent studies have revealed the role of CD44, a widely expressed cell surface adhesion molecule, in promoting pathological angiogenesis and the development of its associated diseases through its regulation of diverse function of endothelial cells, such as proliferation, migration, adhesion, invasion, and communication with the microenvironment. Conversely, the absence of CD44 expression or inhibition of its function impairs pathological angiogenesis and disease progression. Here, we summarize the current understanding of the roles of CD44 in pathological angiogenesis and the underlying cellular and molecular mechanisms.
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Affiliation(s)
- Li Chen
- Department of Rehabilitation Medicine Center, West China Hospital, Sichuan University, Chengdu, P.R. China.,Key Laboratory of Rehabilitation Medicine in Sichuan Province, West China Hospital, Sichuan University, Chengdu, P.R. China.,State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-Sen University, Guangzhou, P.R. China
| | - Chenying Fu
- State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Chengdu, P.R. China
| | - Qing Zhang
- Department of Rehabilitation Medicine Center, West China Hospital, Sichuan University, Chengdu, P.R. China.,Key Laboratory of Rehabilitation Medicine in Sichuan Province, West China Hospital, Sichuan University, Chengdu, P.R. China
| | - Chengqi He
- Department of Rehabilitation Medicine Center, West China Hospital, Sichuan University, Chengdu, P.R. China.,Key Laboratory of Rehabilitation Medicine in Sichuan Province, West China Hospital, Sichuan University, Chengdu, P.R. China
| | - Feng Zhang
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-Sen University, Guangzhou, P.R. China
| | - Quan Wei
- Department of Rehabilitation Medicine Center, West China Hospital, Sichuan University, Chengdu, P.R. China.,Key Laboratory of Rehabilitation Medicine in Sichuan Province, West China Hospital, Sichuan University, Chengdu, P.R. China
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8
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Kurmi BD, Patel P, Paliwal R, Paliwal SR. Molecular approaches for targeted drug delivery towards cancer: A concise review with respect to nanotechnology. J Drug Deliv Sci Technol 2020. [DOI: 10.1016/j.jddst.2020.101682] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
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9
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Heldin P, Kolliopoulos C, Lin CY, Heldin CH. Involvement of hyaluronan and CD44 in cancer and viral infections. Cell Signal 2019; 65:109427. [PMID: 31654718 DOI: 10.1016/j.cellsig.2019.109427] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2019] [Revised: 09/19/2019] [Accepted: 09/19/2019] [Indexed: 02/07/2023]
Abstract
Hyaluronan and its major receptor CD44 are ubiquitously distributed. They have important structural as well as signaling roles, regulating tissue homeostasis, and their expression levels are tightly regulated. In addition to signaling initiated by the interaction of the intracellular domain of CD44 with cytoplasmic signaling molecules, CD44 has important roles as a co-receptor for different types of receptors of growth factors and cytokines. Dysregulation of hyaluronan-CD44 interactions is seen in diseases, such as inflammation and cancer. In the present communication, we discuss the mechanism of hyaluronan-induced signaling via CD44, as well as the involvement of hyaluronan-engaged CD44 in malignancies and in viral infections.
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Affiliation(s)
- Paraskevi Heldin
- Department of Medical Biochemistry and Microbiology, Box 582, Uppsala University, SE-751 23 Uppsala, Sweden.
| | - Constantinos Kolliopoulos
- Department of Medical Biochemistry and Microbiology, Box 582, Uppsala University, SE-751 23 Uppsala, Sweden
| | - Chun-Yu Lin
- Department of Medical Biochemistry and Microbiology, Box 582, Uppsala University, SE-751 23 Uppsala, Sweden; Division of Infectious Diseases, Department of Internal Medicine, Kaohsiung Medical University Hospital, Kaohsiung Medical University Department of Surgery, Uppsala University, Sweden; Department of Surgical Sciences, Uppsala University, Akademiska Hospital, 751 85 Uppsala, Sweden
| | - Carl-Henrik Heldin
- Department of Medical Biochemistry and Microbiology, Box 582, Uppsala University, SE-751 23 Uppsala, Sweden.
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10
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Role of cell surface proteoglycans in cancer immunotherapy. Semin Cancer Biol 2019; 62:48-67. [PMID: 31336150 DOI: 10.1016/j.semcancer.2019.07.012] [Citation(s) in RCA: 50] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2019] [Revised: 07/05/2019] [Accepted: 07/17/2019] [Indexed: 12/23/2022]
Abstract
Over the past few decades, understanding how tumor cells evade the immune system and their communication with their tumor microenvironment, has been the subject of intense investigation, with the aim of developing new cancer immunotherapies. The current therapies against cancer such as monoclonal antibodies against checkpoint inhibitors, adoptive T-cell transfer, cytokines, vaccines, and oncolytic viruses have managed to improve the clinical outcome of the patients. However, in some tumor entities, the response is limited and could benefit from the identification of novel therapeutic targets. It is known that tumor-extracellular matrix interplay and matrix remodeling are necessary for anti-tumor and pro-tumoral immune responses. Proteoglycans are dominant components of the extracellular matrix and are a highly heterogeneous group of proteins characterized by the covalent attachment of a specific linear carbohydrate chain of the glycosaminoglycan type. At cell surfaces, these molecules modulate the expression and activity of cytokines, chemokines, growth factors, adhesion molecules, and function as signaling co-receptors. By these mechanisms, proteoglycans influence the behavior of cancer cells and their microenvironment during the progression of solid tumors and hematopoietic malignancies. In this review, we discuss why cell surface proteoglycans are attractive pharmacological targets in cancer, and we present current and recent developments in cancer immunology and immunotherapy utilizing proteoglycan-targeted strategies.
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11
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Mereiter S, Martins ÁM, Gomes C, Balmaña M, Macedo JA, Polom K, Roviello F, Magalhães A, Reis CA. O‐glycan truncation enhances cancer‐related functions of
CD
44 in gastric cancer. FEBS Lett 2019; 593:1675-1689. [DOI: 10.1002/1873-3468.13432] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2019] [Revised: 05/04/2019] [Accepted: 05/06/2019] [Indexed: 01/16/2023]
Affiliation(s)
- Stefan Mereiter
- I3S – Instituto de Investigação e Inovação em Saúde Universidade do Porto Portugal
- IPATIMUP – Institute of Molecular Pathology and Immunology University of Porto Portugal
| | - Álvaro M. Martins
- I3S – Instituto de Investigação e Inovação em Saúde Universidade do Porto Portugal
- IPATIMUP – Institute of Molecular Pathology and Immunology University of Porto Portugal
| | - Catarina Gomes
- I3S – Instituto de Investigação e Inovação em Saúde Universidade do Porto Portugal
- IPATIMUP – Institute of Molecular Pathology and Immunology University of Porto Portugal
| | - Meritxell Balmaña
- I3S – Instituto de Investigação e Inovação em Saúde Universidade do Porto Portugal
- IPATIMUP – Institute of Molecular Pathology and Immunology University of Porto Portugal
| | - Joana A. Macedo
- I3S – Instituto de Investigação e Inovação em Saúde Universidade do Porto Portugal
- IPATIMUP – Institute of Molecular Pathology and Immunology University of Porto Portugal
| | - Karol Polom
- Department of Surgical Oncology Medical University of Gdansk Poland
- General Surgery and Surgical Oncology Department University of Siena Italy
| | - Franco Roviello
- General Surgery and Surgical Oncology Department University of Siena Italy
| | - Ana Magalhães
- I3S – Instituto de Investigação e Inovação em Saúde Universidade do Porto Portugal
- IPATIMUP – Institute of Molecular Pathology and Immunology University of Porto Portugal
| | - Celso A. Reis
- I3S – Instituto de Investigação e Inovação em Saúde Universidade do Porto Portugal
- IPATIMUP – Institute of Molecular Pathology and Immunology University of Porto Portugal
- Faculty of Medicine University of Porto Portugal
- Instituto de Ciências Biomédicas Abel Salazar University of Porto Portugal
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12
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Collins LE, Troeberg L. Heparan sulfate as a regulator of inflammation and immunity. J Leukoc Biol 2018; 105:81-92. [PMID: 30376187 DOI: 10.1002/jlb.3ru0618-246r] [Citation(s) in RCA: 56] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2018] [Revised: 09/30/2018] [Accepted: 10/01/2018] [Indexed: 12/19/2022] Open
Abstract
Heparan sulfate is found on the surface of most cell types, as well as in basement membranes and extracellular matrices. Its strong anionic properties and highly variable structure enable this glycosaminoglycan to provide binding sites for numerous protein ligands, including many soluble mediators of the immune system, and may promote or inhibit their activity. The formation of ligand binding sites on heparan sulfate (HS) occurs in a tissue- and context-specific fashion through the action of several families of enzymes, most of which have multiple isoforms with subtly different specificities. Changes in the expression levels of these biosynthetic enzymes occur in response to inflammatory stimuli, resulting in structurally different HS and acquisition or loss of binding sites for immune mediators. In this review, we discuss the multiple roles for HS in regulating immune responses, and the evidence for inflammation-associated changes to HS structure.
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Affiliation(s)
- Laura E Collins
- Nuffield Department of Orthopaedics, Rheumatology and Musculoskeletal Sciences, Kennedy Institute of Rheumatology, University of Oxford, Oxford, UK
| | - Linda Troeberg
- Nuffield Department of Orthopaedics, Rheumatology and Musculoskeletal Sciences, Kennedy Institute of Rheumatology, University of Oxford, Oxford, UK
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13
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Wang L, Li HG, Wen JM, Peng TS, Zeng H, Wang LY. Expression of CD44v3, Erythropoietin and VEGF-C in Gastric Adenocarcinomas: Correlations with Clinicopathological Features. TUMORI JOURNAL 2018. [DOI: 10.1177/1578.17216] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Lin Wang
- Department of Pathology, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou
| | - Hai-Gang Li
- Department of Pathology, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou
| | - Jian-Ming Wen
- Department of Pathology, the First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China
| | - Ting-Sheng Peng
- Department of Pathology, the First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China
| | - Hong Zeng
- Department of Pathology, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou
| | - Ling-Yun Wang
- Department of Internal Medicine, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou
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14
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Kostas M, Haugsten EM, Zhen Y, Sørensen V, Szybowska P, Fiorito E, Lorenz S, Jones N, de Souza GA, Wiedlocha A, Wesche J. Protein Tyrosine Phosphatase Receptor Type G (PTPRG) Controls Fibroblast Growth Factor Receptor (FGFR) 1 Activity and Influences Sensitivity to FGFR Kinase Inhibitors. Mol Cell Proteomics 2018; 17:850-870. [PMID: 29371290 DOI: 10.1074/mcp.ra117.000538] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2017] [Indexed: 12/19/2022] Open
Abstract
Recently, FGFR1 was found to be overexpressed in osteosarcoma and represents an important target for precision medicine. However, because targeted cancer therapy based on FGFR inhibitors has so far been less efficient than expected, a detailed understanding of the target is important. We have here applied proximity-dependent biotin labeling combined with label-free quantitative mass spectrometry to identify determinants of FGFR1 activity in an osteosarcoma cell line. Many known FGFR interactors were identified (e.g. FRS2, PLCG1, RSK2, SRC), but the data also suggested novel determinants. A strong hit in our screen was the tyrosine phosphatase PTPRG. We show that PTPRG and FGFR1 interact and colocalize at the plasma membrane where PTPRG directly dephosphorylates activated FGFR1. We further show that osteosarcoma cell lines depleted for PTPRG display increased FGFR activity and are hypersensitive to stimulation by FGF1. In addition, PTPRG depletion elevated cell growth and negatively affected the efficacy of FGFR kinase inhibitors. Thus, PTPRG may have future clinical relevance by being a predictor of outcome after FGFR inhibitor treatment.
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Affiliation(s)
- Michal Kostas
- From the ‡Department of Molecular Cell Biology, Institute for Cancer Research, The Norwegian Radium Hospital, Oslo University Hospital, Montebello, 0379 Oslo, Norway.,§Centre for Cancer Cell Reprogramming, Institute of Clinical Medicine, Faculty of Medicine, University of Oslo, Montebello, 0379 Oslo, Norway
| | - Ellen Margrethe Haugsten
- §Centre for Cancer Cell Reprogramming, Institute of Clinical Medicine, Faculty of Medicine, University of Oslo, Montebello, 0379 Oslo, Norway.,¶Department of Tumor Biology, Institute for Cancer Research, The Norwegian Radium Hospital, Oslo University Hospital, 0379 Oslo, Norway
| | - Yan Zhen
- From the ‡Department of Molecular Cell Biology, Institute for Cancer Research, The Norwegian Radium Hospital, Oslo University Hospital, Montebello, 0379 Oslo, Norway.,§Centre for Cancer Cell Reprogramming, Institute of Clinical Medicine, Faculty of Medicine, University of Oslo, Montebello, 0379 Oslo, Norway
| | - Vigdis Sørensen
- From the ‡Department of Molecular Cell Biology, Institute for Cancer Research, The Norwegian Radium Hospital, Oslo University Hospital, Montebello, 0379 Oslo, Norway.,§Centre for Cancer Cell Reprogramming, Institute of Clinical Medicine, Faculty of Medicine, University of Oslo, Montebello, 0379 Oslo, Norway.,‖Department of Core Facilities, Institute for Cancer Research, The Norwegian Radium Hospital, Oslo University Hospital, Montebello, 0379 Oslo
| | - Patrycja Szybowska
- From the ‡Department of Molecular Cell Biology, Institute for Cancer Research, The Norwegian Radium Hospital, Oslo University Hospital, Montebello, 0379 Oslo, Norway.,§Centre for Cancer Cell Reprogramming, Institute of Clinical Medicine, Faculty of Medicine, University of Oslo, Montebello, 0379 Oslo, Norway
| | - Elisa Fiorito
- §Centre for Cancer Cell Reprogramming, Institute of Clinical Medicine, Faculty of Medicine, University of Oslo, Montebello, 0379 Oslo, Norway.,¶Department of Tumor Biology, Institute for Cancer Research, The Norwegian Radium Hospital, Oslo University Hospital, 0379 Oslo, Norway
| | - Susanne Lorenz
- §Centre for Cancer Cell Reprogramming, Institute of Clinical Medicine, Faculty of Medicine, University of Oslo, Montebello, 0379 Oslo, Norway.,¶Department of Tumor Biology, Institute for Cancer Research, The Norwegian Radium Hospital, Oslo University Hospital, 0379 Oslo, Norway.,‖Department of Core Facilities, Institute for Cancer Research, The Norwegian Radium Hospital, Oslo University Hospital, Montebello, 0379 Oslo
| | - Nina Jones
- **Department of Molecular and Cellular Biology, University of Guelph, Guelph, ON N1G 2W1, Canada
| | - Gustavo Antonio de Souza
- ‡‡The Brain Institute, Universidade Federal do Rio Grande do Norte, UFRN, Natal, RN 59078, Brazil.,§§Department of Immunology and Centre for Immune Regulation, Oslo University Hospital HF Rikshospitalet, University of Oslo, Oslo, 0424, Norway
| | - Antoni Wiedlocha
- From the ‡Department of Molecular Cell Biology, Institute for Cancer Research, The Norwegian Radium Hospital, Oslo University Hospital, Montebello, 0379 Oslo, Norway.,§Centre for Cancer Cell Reprogramming, Institute of Clinical Medicine, Faculty of Medicine, University of Oslo, Montebello, 0379 Oslo, Norway
| | - Jørgen Wesche
- §Centre for Cancer Cell Reprogramming, Institute of Clinical Medicine, Faculty of Medicine, University of Oslo, Montebello, 0379 Oslo, Norway; .,¶Department of Tumor Biology, Institute for Cancer Research, The Norwegian Radium Hospital, Oslo University Hospital, 0379 Oslo, Norway
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Roles and targeting of the HAS/hyaluronan/CD44 molecular system in cancer. Matrix Biol 2016; 59:3-22. [PMID: 27746219 DOI: 10.1016/j.matbio.2016.10.001] [Citation(s) in RCA: 136] [Impact Index Per Article: 17.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2016] [Revised: 10/02/2016] [Accepted: 10/03/2016] [Indexed: 02/07/2023]
Abstract
Synthesis, deposition, and interactions of hyaluronan (HA) with its cellular receptor CD44 are crucial events that regulate the onset and progression of tumors. The intracellular signaling pathways initiated by HA interactions with CD44 leading to tumorigenic responses are complex. Moreover, HA molecules may perform dual functions depending on their concentration and size. Overexpression of variant isoforms of CD44 (CD44v) is most commonly linked to cancer progression, whereas their loss is associated with inhibition of tumor growth. In this review, we highlight that the regulation of HA synthases (HASes) by post-translational modifications, such as O-GlcNAcylation and ubiquitination, environmental factors and the action of microRNAs is important for HA synthesis and secretion in the tumor microenvironment. Moreover, we focus on the roles and interactions of CD44 with various proteins that reside extra- and intracellularly, as well as on cellular membranes with particular reference to the CD44-HA axis in cancer stem cell functions, and the importance of CD44/CD44v6 targeting to inhibit tumorigenesis.
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16
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Matrix Metalloproteinases During Axonal Regeneration, a Multifactorial Role from Start to Finish. Mol Neurobiol 2016; 54:2114-2125. [PMID: 26924318 DOI: 10.1007/s12035-016-9801-x] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2015] [Accepted: 02/16/2016] [Indexed: 12/19/2022]
Abstract
By proteolytic cleavage, matrix metalloproteinases (MMPs) not only remodel the extracellular matrix (ECM) but they also modify the structure and activity of other proteinases, growth factors, signaling molecules, cell surface receptors, etc. Their vast substrate repertoire adds a complex extra dimension of biological control and turns MMPs into important regulatory nodes in the protease web. In the central nervous system (CNS), the detrimental impact of elevated MMP activities has been well-described for traumatic injuries and many neurodegenerative diseases. Nonetheless, there is ample proof corroborating MMPs as fine regulators of CNS physiology, and well-balanced MMP activity is instrumental to development, plasticity, and repair. In this manuscript, we review the emerging evidence for MMPs as beneficial modulators of axonal regeneration in the mammalian CNS. By exploring the multifactorial causes underlying the inability of mature axons to regenerate, and describing how MMPs can help to overcome these hurdles, we emphasize the benign actions of these Janus-faced proteases.
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Garay J, Piazuelo MB, Majumdar S, Li L, Trillo-Tinoco J, Del Valle L, Schneider BG, Delgado AG, Wilson KT, Correa P, Zabaleta J. The homing receptor CD44 is involved in the progression of precancerous gastric lesions in patients infected with Helicobacter pylori and in development of mucous metaplasia in mice. Cancer Lett 2016; 371:90-8. [PMID: 26639196 PMCID: PMC4714604 DOI: 10.1016/j.canlet.2015.10.037] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2015] [Revised: 09/09/2015] [Accepted: 10/05/2015] [Indexed: 01/06/2023]
Abstract
Infection with Helicobacter pylori (H. pylori) leads to inflammatory events that can promote gastric cancer development. Immune cells transition from the circulation into the infected mucosa through the interaction of their receptors and ligands in the endothelial compartment. CD44 expression is increased in advanced gastric lesions. However, the association of this molecule with the progression of these lesions over time has not been investigated. In addition, there is a lack of understanding of the CD44-dependent cellular processes that lead to gastritis, and possibly to gastric cancer. Here we studied H. pylori-positive subjects with gastric lesions that ranged from multifocal atrophic gastritis to dysplasia to determine gene expression changes associated with disease progression over a period of 6 years. We report that CD44 expression is significantly increased in individuals whose gastric lesions progressed along the gastric precancerous cascade. We also show that CD44-/- mice develop less severe and less extensive H. pylori-induced metaplasia, and show fewer infiltrating Gr1+ cells compared to wild type mice. We present data suggesting that CD44 is associated with disease progression. Mechanisms associated with these effects include induction of interferon gamma responses.
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MESH Headings
- Animals
- Antigens, Ly/metabolism
- Cells, Cultured
- Chemotaxis, Leukocyte
- Disease Models, Animal
- Disease Progression
- Female
- Gastric Mucosa/immunology
- Gastric Mucosa/metabolism
- Gastric Mucosa/microbiology
- Gastric Mucosa/pathology
- Gastritis, Atrophic/diagnosis
- Gastritis, Atrophic/genetics
- Gastritis, Atrophic/immunology
- Gastritis, Atrophic/metabolism
- Gastritis, Atrophic/microbiology
- Helicobacter Infections/diagnosis
- Helicobacter Infections/genetics
- Helicobacter Infections/immunology
- Helicobacter Infections/metabolism
- Helicobacter Infections/microbiology
- Helicobacter pylori/immunology
- Helicobacter pylori/pathogenicity
- Humans
- Hyaluronan Receptors/genetics
- Hyaluronan Receptors/immunology
- Hyaluronan Receptors/metabolism
- Interferon-gamma/metabolism
- Macrophages, Peritoneal/immunology
- Macrophages, Peritoneal/metabolism
- Mice, Knockout
- Neutrophil Infiltration
- Neutrophils/immunology
- Neutrophils/metabolism
- Precancerous Conditions/diagnosis
- Precancerous Conditions/genetics
- Precancerous Conditions/immunology
- Precancerous Conditions/metabolism
- Precancerous Conditions/microbiology
- Signal Transduction
- Stomach Neoplasms/diagnosis
- Stomach Neoplasms/genetics
- Stomach Neoplasms/immunology
- Stomach Neoplasms/metabolism
- Stomach Neoplasms/microbiology
- Time Factors
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Affiliation(s)
- Jone Garay
- Stanley S. Scott Cancer Center, LSUHSC, New Orleans, LA, USA
| | - M Blanca Piazuelo
- Division of Gastroenterology, Hepatology, and Nutrition, Department of Medicine, Vanderbilt University Medical Center, Nashville, TN, USA
| | - Sumana Majumdar
- Stanley S. Scott Cancer Center, LSUHSC, New Orleans, LA, USA
| | - Li Li
- Stanley S. Scott Cancer Center, LSUHSC, New Orleans, LA, USA
| | | | - Luis Del Valle
- Stanley S. Scott Cancer Center, LSUHSC, New Orleans, LA, USA; Department of Pathology, LSUHSC, New Orleans, LA, USA
| | - Barbara G Schneider
- Division of Gastroenterology, Hepatology, and Nutrition, Department of Medicine, Vanderbilt University Medical Center, Nashville, TN, USA
| | - Alberto G Delgado
- Division of Gastroenterology, Hepatology, and Nutrition, Department of Medicine, Vanderbilt University Medical Center, Nashville, TN, USA
| | - Keith T Wilson
- Division of Gastroenterology, Hepatology, and Nutrition, Department of Medicine, Vanderbilt University Medical Center, Nashville, TN, USA
| | - Pelayo Correa
- Division of Gastroenterology, Hepatology, and Nutrition, Department of Medicine, Vanderbilt University Medical Center, Nashville, TN, USA
| | - Jovanny Zabaleta
- Stanley S. Scott Cancer Center, LSUHSC, New Orleans, LA, USA; Department of Pediatrics, LSUHSC New Orleans, LA, USA.
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18
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Function of Membrane-Associated Proteoglycans in the Regulation of Satellite Cell Growth. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2016; 900:61-95. [DOI: 10.1007/978-3-319-27511-6_4] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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19
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Spinelli FM, Vitale DL, Demarchi G, Cristina C, Alaniz L. The immunological effect of hyaluronan in tumor angiogenesis. Clin Transl Immunology 2015; 4:e52. [PMID: 26719798 PMCID: PMC4685440 DOI: 10.1038/cti.2015.35] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2015] [Revised: 10/26/2015] [Accepted: 10/27/2015] [Indexed: 12/21/2022] Open
Abstract
The relationship between the immune system and angiogenesis has been described in several contexts, both in physiological and pathological conditions, as pregnancy and cancer. In fact, different types of immune cells, such as myeloid, macrophages and denditric cells, are able to modulate tumor neovascularization. On the other hand, tumor microenvironment also includes extracellular matrix components like hyaluronan, which has a deregulated synthesis in different tumors. Hyaluronan is a glycosaminoglycan, normally present in the extracellular matrix of tissues in continuous remodeling (embryogenesis or wound healing processes) and acts as an important modulator of cell behavior by different mechanisms, including angiogenesis. In this review, we discuss hyaluronan as a modulator of tumor angiogenesis, focusing in intracellular signaling mediated by its receptors expressed on different immune cells. Recent observations suggest that the immune system is an important component in tumoural angiogenesis. Therefore, immune modulation could have an impact in anti-angiogenic therapy as a new therapeutic strategy, which in turn might improve effectiveness of treatment in cancer patients.
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Affiliation(s)
- Fiorella M Spinelli
- Centro de Investigaciones Básicas y Aplicadas (CIBA), CIT NOBA, Universidad Nacional del Noroeste de la Pcia. de Bs. As. Consejo Nacional de Investigaciones Científicas y Técnicas (UNNOBA-CONICET), Junín, Pcia. Bs. As., Argentina
- Laboratory of Tumour Microenvironment, CIBA, Junín, Pcia. Bs. As., Argentina
| | - Daiana L Vitale
- Centro de Investigaciones Básicas y Aplicadas (CIBA), CIT NOBA, Universidad Nacional del Noroeste de la Pcia. de Bs. As. Consejo Nacional de Investigaciones Científicas y Técnicas (UNNOBA-CONICET), Junín, Pcia. Bs. As., Argentina
- Laboratory of Tumour Microenvironment, CIBA, Junín, Pcia. Bs. As., Argentina
| | - Gianina Demarchi
- Centro de Investigaciones Básicas y Aplicadas (CIBA), CIT NOBA, Universidad Nacional del Noroeste de la Pcia. de Bs. As. Consejo Nacional de Investigaciones Científicas y Técnicas (UNNOBA-CONICET), Junín, Pcia. Bs. As., Argentina
- Laboratory of Pituitary Physiopathology, CIBA, Junín, Provincia de Buenos Aires, Argentina
| | - Carolina Cristina
- Centro de Investigaciones Básicas y Aplicadas (CIBA), CIT NOBA, Universidad Nacional del Noroeste de la Pcia. de Bs. As. Consejo Nacional de Investigaciones Científicas y Técnicas (UNNOBA-CONICET), Junín, Pcia. Bs. As., Argentina
- Laboratory of Pituitary Physiopathology, CIBA, Junín, Provincia de Buenos Aires, Argentina
| | - Laura Alaniz
- Centro de Investigaciones Básicas y Aplicadas (CIBA), CIT NOBA, Universidad Nacional del Noroeste de la Pcia. de Bs. As. Consejo Nacional de Investigaciones Científicas y Técnicas (UNNOBA-CONICET), Junín, Pcia. Bs. As., Argentina
- Laboratory of Tumour Microenvironment, CIBA, Junín, Pcia. Bs. As., Argentina
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20
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Choong FJ, Freeman C, Parish CR, Simeonovic CJ. Islet heparan sulfate but not heparan sulfate proteoglycan core protein is lost during islet isolation and undergoes recovery post-islet transplantation. Am J Transplant 2015; 15:2851-64. [PMID: 26104150 DOI: 10.1111/ajt.13366] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2014] [Revised: 03/29/2015] [Accepted: 04/19/2015] [Indexed: 01/25/2023]
Abstract
Islet beta cells in situ express intracellular heparan sulfate (HS), a property previously shown in vitro to be important for their survival. We report that HS levels inside islet beta cells correlate with the novel intracellular localization of the HSPG core proteins for collagen type XVIII (Col18), a conventional extracellular matrix component. Syndecan-1 (Sdc1) and CD44 core proteins were similarly localized inside beta cells. During isolation, mouse islets selectively lose HS to 11-27% of normal levels but retain their HSPG core proteins. Intra-islet HS failed to recover substantially during culture for 4 days and was not reconstituted in vitro using HS mimetics. In contrast, significant recovery of intra-islet HS to ∼40-50% of normal levels occurred by 5-10 days after isotransplantation. Loss of islet HS during the isolation procedure is independent of heparanase (a HS-degrading endoglycosidase) and due, in part, to oxidative damage. Treatment with antioxidants reduced islet cell death by ∼60% and increased the HS content of isolated islets by ∼twofold compared to untreated islets, preserving intra-islet HS to ∼60% of the normal HS content of islets in situ. These findings suggest that the preservation of islet HS during the islet isolation process may optimize islet survival posttransplant.
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Affiliation(s)
- F J Choong
- Department of Immunology, The John Curtin School of Medical Research, The Australian National University, Canberra ACT, Australia
| | - C Freeman
- Department of Immunology, The John Curtin School of Medical Research, The Australian National University, Canberra ACT, Australia
| | - C R Parish
- Department of Immunology, The John Curtin School of Medical Research, The Australian National University, Canberra ACT, Australia
| | - C J Simeonovic
- Department of Immunology, The John Curtin School of Medical Research, The Australian National University, Canberra ACT, Australia
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21
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Okolicsanyi RK, Camilleri ET, Oikari LE, Yu C, Cool SM, van Wijnen AJ, Griffiths LR, Haupt LM. Human Mesenchymal Stem Cells Retain Multilineage Differentiation Capacity Including Neural Marker Expression after Extended In Vitro Expansion. PLoS One 2015; 10:e0137255. [PMID: 26356539 PMCID: PMC4565666 DOI: 10.1371/journal.pone.0137255] [Citation(s) in RCA: 55] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2015] [Accepted: 08/13/2015] [Indexed: 12/21/2022] Open
Abstract
The suitability of human mesenchymal stem cells (hMSCs) in regenerative medicine relies on retention of their proliferative expansion potential in conjunction with the ability to differentiate toward multiple lineages. Successful utilisation of these cells in clinical applications linked to tissue regeneration requires consideration of biomarker expression, time in culture and donor age, as well as their ability to differentiate towards mesenchymal (bone, cartilage, fat) or non-mesenchymal (e.g., neural) lineages. To identify potential therapeutic suitability we examined hMSCs after extended expansion including morphological changes, potency (stemness) and multilineage potential. Commercially available hMSC populations were expanded in vitro for > 20 passages, equating to > 60 days and > 50 population doublings. Distinct growth phases (A-C) were observed during serial passaging and cells were characterised for stemness and lineage markers at representative stages (Phase A: P+5, approximately 13 days in culture; Phase B: P+7, approximately 20 days in culture; and Phase C: P+13, approximately 43 days in culture). Cell surface markers, stem cell markers and lineage-specific markers were characterised by FACS, ICC and Q-PCR revealing MSCs maintained their multilineage potential, including neural lineages throughout expansion. Co-expression of multiple lineage markers along with continued CD45 expression in MSCs did not affect completion of osteogenic and adipogenic specification or the formation of neurospheres. Improved standardised isolation and characterisation of MSCs may facilitate the identification of biomarkers to improve therapeutic efficacy to ensure increased reproducibility and routine production of MSCs for therapeutic applications including neural repair.
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Affiliation(s)
- Rachel K. Okolicsanyi
- Genomics Research Centre, Institute of Health and Biomedical Innovation, Queensland University of Technology, Brisbane, QLD, Australia
| | - Emily T. Camilleri
- Department of Orthopedic Surgery & Biochemistry and Molecular Biology, Mayo Clinic, Rochester, MN, United States of America
| | - Lotta E Oikari
- Genomics Research Centre, Institute of Health and Biomedical Innovation, Queensland University of Technology, Brisbane, QLD, Australia
| | - Chieh Yu
- Genomics Research Centre, Institute of Health and Biomedical Innovation, Queensland University of Technology, Brisbane, QLD, Australia
| | - Simon M. Cool
- Institute of Medical Biology, Glycotherapeutics Group, A*STAR, Singapore, Singapore
| | - Andre J. van Wijnen
- Department of Orthopedic Surgery & Biochemistry and Molecular Biology, Mayo Clinic, Rochester, MN, United States of America
| | - Lyn R. Griffiths
- Genomics Research Centre, Institute of Health and Biomedical Innovation, Queensland University of Technology, Brisbane, QLD, Australia
| | - Larisa M. Haupt
- Genomics Research Centre, Institute of Health and Biomedical Innovation, Queensland University of Technology, Brisbane, QLD, Australia
- * E-mail:
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22
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Orian-Rousseau V, Sleeman J. CD44 is a multidomain signaling platform that integrates extracellular matrix cues with growth factor and cytokine signals. Adv Cancer Res 2015; 123:231-54. [PMID: 25081532 DOI: 10.1016/b978-0-12-800092-2.00009-5] [Citation(s) in RCA: 83] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
The reception and integration of the plethora of signals a cell receives from its microenvironment is decisive in determining cell behavior. Perturbation of extracellular cues, or an inappropriate response to or integration of these signals lies at the root of many diseases such as cancer. The transmembrane protein CD44 contributes to the reception of a broad variety of microenvironmental components, including extracellular matrix constituents such as hyaluronic acid, as well as growth factors and cytokines. In this chapter, we review the range of extracellular cues that are recognized by CD44, and show how CD44 serves to integrate this information at several levels through the mechanisms by which it contributes to transduction of these various microenvironmental signals.
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Affiliation(s)
| | - Jonathan Sleeman
- Karlsruhe Institute of Technology, Institute of Toxicology and Genetics, Karlsruhe, Germany; Centre for Biomedicine and Medical Technology Mannheim (CBTM), Universitätsmedizin Mannheim, University of Heidelberg, Mannheim, Germany
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23
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Martinez P, Denys A, Delos M, Sikora AS, Carpentier M, Julien S, Pestel J, Allain F. Macrophage polarization alters the expression and sulfation pattern of glycosaminoglycans. Glycobiology 2014; 25:502-13. [PMID: 25504800 DOI: 10.1093/glycob/cwu137] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
Macrophages are major cells of inflammatory process and take part in a large number of physiological and pathological processes. According to tissue environment, they can polarize into pro-inflammatory (M1) or alternative (M2) cells. Although many evidences have hinted to a potential role of cell-surface glycosaminoglycans (GAGs) in the functions of macrophages, the effect of M1 or M2 polarization on the biosynthesis of these polysaccharides has not been investigated so far. GAGs are composed of repeat sulfated disaccharide units. Heparan (HS) and chondroitin/dermatan sulfates (CS/DS) are the major GAGs expressed at the cell membrane. They are involved in numerous biological processes, which rely on their ability to selectively interact with a large panel of proteins. More than 20 genes encoding sulfotransferases have been implicated in HS and CS/DS biosynthesis, and the functional repertoire of HS and CS/DS has been related to the expression of these isoenzymes. In this study, we analyzed the expression of sulfotransferases as a response to macrophage polarization. We found that M1 and M2 activation drastically modified the profiles of expression of numerous HS and CS/DS sulfotransferases. This was accompanied by the expression of GAGs with distinct structural features. We then demonstrated that GAGs of M2 macrophages were efficient to present fibroblast growth factor-2 in an assay of tumor cell proliferation, thus indicating that changes in GAG structure may contribute to the functions of polarized macrophages. Altogether, our findings suggest a regulatory mechanism in which fine modifications in GAG biosynthesis may participate to the plasticity of macrophage functions.
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Affiliation(s)
- Pierre Martinez
- Unité de Glycobiologie Structurale et Fonctionnelle, UMR 8576 du Centre National de la Recherche Scientifique-Université Lille 1, Sciences et Technologies, Villeneuve d'Ascq F-59655, France
| | - Agnès Denys
- Unité de Glycobiologie Structurale et Fonctionnelle, UMR 8576 du Centre National de la Recherche Scientifique-Université Lille 1, Sciences et Technologies, Villeneuve d'Ascq F-59655, France
| | - Maxime Delos
- Unité de Glycobiologie Structurale et Fonctionnelle, UMR 8576 du Centre National de la Recherche Scientifique-Université Lille 1, Sciences et Technologies, Villeneuve d'Ascq F-59655, France
| | - Anne-Sophie Sikora
- Unité de Glycobiologie Structurale et Fonctionnelle, UMR 8576 du Centre National de la Recherche Scientifique-Université Lille 1, Sciences et Technologies, Villeneuve d'Ascq F-59655, France
| | - Mathieu Carpentier
- Unité de Glycobiologie Structurale et Fonctionnelle, UMR 8576 du Centre National de la Recherche Scientifique-Université Lille 1, Sciences et Technologies, Villeneuve d'Ascq F-59655, France
| | - Sylvain Julien
- Unité de Glycobiologie Structurale et Fonctionnelle, UMR 8576 du Centre National de la Recherche Scientifique-Université Lille 1, Sciences et Technologies, Villeneuve d'Ascq F-59655, France
| | - Joël Pestel
- Unité de Glycobiologie Structurale et Fonctionnelle, UMR 8576 du Centre National de la Recherche Scientifique-Université Lille 1, Sciences et Technologies, Villeneuve d'Ascq F-59655, France
| | - Fabrice Allain
- Unité de Glycobiologie Structurale et Fonctionnelle, UMR 8576 du Centre National de la Recherche Scientifique-Université Lille 1, Sciences et Technologies, Villeneuve d'Ascq F-59655, France
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24
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Intracellular targeting of CD44+ cells with self-assembling, protein only nanoparticles. Int J Pharm 2014; 473:286-95. [DOI: 10.1016/j.ijpharm.2014.07.016] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2014] [Revised: 07/07/2014] [Accepted: 07/09/2014] [Indexed: 02/07/2023]
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25
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Heparan sulfate signaling in cancer. Trends Biochem Sci 2014; 39:277-88. [PMID: 24755488 DOI: 10.1016/j.tibs.2014.03.001] [Citation(s) in RCA: 142] [Impact Index Per Article: 14.2] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2014] [Revised: 03/05/2014] [Accepted: 03/07/2014] [Indexed: 01/03/2023]
Abstract
Heparan sulfate (HS) is a biopolymer consisting of variably sulfated repeating disaccharide units. The anticoagulant heparin is a highly sulfated intracellular variant of HS. HS has demonstrated roles in embryonic development, homeostasis, and human disease via non-covalent interactions with numerous cellular proteins, including growth factors and their receptors. HS can function as a co-receptor by enhancing receptor-complex formation. In other contexts, HS disrupts signaling complexes or serves as a ligand sink. The effects of HS on growth factor signaling are tightly regulated by the actions of sulfyltransferases, sulfatases, and heparanases. HS has important emerging roles in oncogenesis, and heparin derivatives represent potential therapeutic strategies for human cancers. Here we review recent insights into HS signaling in tumor proliferation, angiogenesis, metastasis, and differentiation. A cancer-specific understanding of HS signaling could uncover potential therapeutic targets in this highly actionable signaling network.
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26
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Noda M, Takii K, Parajuli B, Kawanokuchi J, Sonobe Y, Takeuchi H, Mizuno T, Suzumura A. FGF-2 released from degenerating neurons exerts microglial-induced neuroprotection via FGFR3-ERK signaling pathway. J Neuroinflammation 2014; 11:76. [PMID: 24735639 PMCID: PMC4022102 DOI: 10.1186/1742-2094-11-76] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2014] [Accepted: 03/26/2014] [Indexed: 12/02/2022] Open
Abstract
Background The accumulation of activated microglia is a hallmark of various neurodegenerative diseases. Microglia may have both protective and toxic effects on neurons through the production of various soluble factors, such as chemokines. Indeed, various chemokines mediate the rapid and accurate migration of microglia to lesions. In the zebra fish, another well-known cellular migrating factor is fibroblast growth factor-2 (FGF-2). Although FGF-2 does exist in the mammalian central nervous system (CNS), it is unclear whether FGF-2 influences microglial function. Methods The extent of FGF-2 release was determined by ELISA, and the expression of its receptors was examined by immunocytochemistry. The effect of several drug treatments on a neuron and microglia co-culture system was estimated by immunocytochemistry, and the neuronal survival rate was quantified. Microglial phagocytosis was evaluated by immunocytochemistry and quantification, and microglial migration was estimated by fluorescence-activated cell sorting (FACS). Molecular biological analyses, such as Western blotting and promoter assay, were performed to clarify the FGF-2 downstream signaling pathway in microglia. Results Fibroblast growth factor-2 is secreted by neurons when damaged by glutamate or oligomeric amyloid β 1-42. FGF-2 enhances microglial migration and phagocytosis of neuronal debris, and is neuroprotective against glutamate toxicity through FGFR3-extracellular signal-regulated kinase (ERK) signaling pathway, which is directly controlled by Wnt signaling in microglia. Conclusions FGF-2 secreted from degenerating neurons may act as a ‘help-me’ signal toward microglia by inducing migration and phagocytosis of unwanted debris.
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Affiliation(s)
| | | | | | | | | | | | - Tetsuya Mizuno
- Department of Neuroimmunology, Research Institute of Environmental Medicine, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8601, Japan.
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Kurzbach D, Schwarz TC, Platzer G, Höfler S, Hinderberger D, Konrat R. Kompensatorische Anpassungen der strukturellen Dynamik eines intrinsisch unstrukturierten Protein-Komplexes. Angew Chem Int Ed Engl 2014. [DOI: 10.1002/ange.201308389] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
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Kurzbach D, Schwarz TC, Platzer G, Höfler S, Hinderberger D, Konrat R. Compensatory adaptations of structural dynamics in an intrinsically disordered protein complex. Angew Chem Int Ed Engl 2014; 53:3840-3. [PMID: 24604825 DOI: 10.1002/anie.201308389] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2013] [Revised: 11/11/2013] [Indexed: 01/08/2023]
Abstract
Intrinsically disordered proteins (IDPs) play crucial roles in protein interaction networks and in this context frequently constitute important hubs and interfaces. Here we show by a combination of NMR and EPR spectroscopy that the binding of the cytokine osteopontin (OPN) to its natural ligand, heparin, is accompanied by thermodynamically compensating structural adaptations. The core segment of OPN expands upon binding. This "unfolding-upon-binding" is governed primarily through electrostatic interactions between heparin and charged patches along the protein backbone and compensates for entropic penalties due to heparin-OPN binding. It is shown how structural unfolding compensates for entropic losses through ligand binding in IDPs and elucidates the interplay between structure and thermodynamics of rapid substrate-binding and -release events in IDP interaction networks.
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Affiliation(s)
- Dennis Kurzbach
- Department of Structural and Computational Biology, Max F. Perutz Laboratories, Vienna Biocenter Campus 5, 1030 Vienna (Austria)
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Adeeb N, Mortazavi MM. The role of FGF2 in spinal cord trauma and regeneration research. Brain Behav 2014; 4:105-7. [PMID: 24683505 PMCID: PMC3967528 DOI: 10.1002/brb3.207] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/02/2013] [Accepted: 12/02/2013] [Indexed: 11/12/2022] Open
Affiliation(s)
- Nimer Adeeb
- Department of Neurological Surgery, University of Washington Seattle, Washington
| | - Martin M Mortazavi
- Department of Neurological Surgery, University of Washington Seattle, Washington
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Abstract
Metastatic spread of breast cancer cells, facilitated by the epithelial-mesenchymal transition (EMT) process, is responsible for the majority of breast cancer mortality. Increased levels of hyaluronan due to deregulation of hyaluronan-synthesizing enzymes, like HAS2, and expression of CD44, the key receptor for hyaluronan, are correlated to poor outcome of patients with basal-like breast cancer. TGFβ induces HAS2 and CD44, both of which are required in the course of efficient TGFβ-induced EMT processes by mammary epithelial cells. Elucidation of the molecular mechanisms underlying tumor-stroma interactions in breast cancer including the regulation of HAS2 and CD44 expression may contribute to the development of better strategies to treat breast cancer patients.
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Affiliation(s)
- Paraskevi Heldin
- Ludwig Institute for Cancer Research, Science for Life Laboratory, Uppsala University, Uppsala, Sweden; Department of Medical Biochemistry and Microbiology, Uppsala University, Uppsala, Sweden.
| | - Kaustuv Basu
- Ludwig Institute for Cancer Research, Science for Life Laboratory, Uppsala University, Uppsala, Sweden
| | - Inna Kozlova
- Ludwig Institute for Cancer Research, Science for Life Laboratory, Uppsala University, Uppsala, Sweden
| | - Helena Porsch
- Ludwig Institute for Cancer Research, Science for Life Laboratory, Uppsala University, Uppsala, Sweden
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Maldonado-Báez L, Williamson C, Donaldson JG. Clathrin-independent endocytosis: a cargo-centric view. Exp Cell Res 2013; 319:2759-69. [PMID: 23954817 DOI: 10.1016/j.yexcr.2013.08.008] [Citation(s) in RCA: 81] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2013] [Revised: 08/06/2013] [Accepted: 08/07/2013] [Indexed: 12/12/2022]
Abstract
Clathrin-independent endocytosis occurs in all cells and interest in this mode of cellular entry has grown. Although this form of endocytosis was first described for entry of bacterial toxins, here we focus our attention on the endogenous cell surface "cargo" proteins that enter cells by this mechanism. The cargo proteins entering by this mechanism are varied and include nutrient transporters, ion channels, cell adhesion molecules and proteins associated with the immune system. Despite the apparent lack of selection at the cell surface, we provide some examples of specific sorting of these cargo proteins after entry, leading to distinct itineraries and cellular fates.
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Affiliation(s)
- Lymarie Maldonado-Báez
- Cell Biology & Physiology Center, National Heart, Lung and Blood Institute, NIH, Bethesda, MD 20892, USA
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Evidence for the interaction of fibroblast growth factor-2 with the lymphatic endothelial cell marker LYVE-1. Blood 2012; 121:1229-37. [PMID: 23264596 DOI: 10.1182/blood-2012-08-450502] [Citation(s) in RCA: 55] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
LYVE-1 (lymphatic vessel endothelial hyaluronan receptor-1) is a homolog of the hyaluronan receptor CD44, and one of the most widely used markers of lymphatic endothelial cells in normal and tumor tissues. However, the physiologic role of LYVE-1 in the lymphatic system still remains unclear. It is well established that fibroblast growth factor 2 (FGF2) induces lymphangiogenesis. Based on the known interaction between FGF2 and CD44 and based on the structural similarity of CD44 and LYVE-1, we investigated whether FGF2 might interact with LYVE-1. We found that FGF2 is able to bind LYVE-1 using AlphaScreen, or after surface-immobilization or in solution. FGF2 binds to LYVE-1 with a higher affinity than any other known LYVE-1–binding molecules, such as hyaluronan or PDGF-BB. Glycosylation of LYVE-1 is important for FGF2 binding. Furthermore, FGF2 interacts with LYVE-1 when overexpressed in CHO cells. Soluble LYVE-1 and knockdown of LYVE-1 in lymphatic endothelial cells impaired FGF2 signaling and functions. In addition, FGF2 but not VEGF-C-induced in vivo lymphangiogenesis, was also inhibited. Conversely, FGF2 also modulates LYVE-1 expression in cells and ex vivo. Thus, our data demonstrate a functional relationship to the interaction between FGF2 and LYVE-1.
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The Role of Hyaluronan and CD44 in the Pathogenesis of Lupus Nephritis. Autoimmune Dis 2012; 2012:207190. [PMID: 22900150 PMCID: PMC3415140 DOI: 10.1155/2012/207190] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2012] [Accepted: 06/11/2012] [Indexed: 12/14/2022] Open
Abstract
Systemic lupus erythematosus (SLE) is a prototype autoimmune disease that affects multiorgan systems. Lupus nephritis is one of the most severe manifestations of SLE whereby immune-mediated inflammation can lead to permanent damage within the glomerular, tubulo-interstitial, and vascular compartments of the kidney, resulting in acute or chronic renal failure. The mechanisms that regulate host inflammatory responses and tissue injury are incompletely understood. Accumulating evidence suggests that hyaluronan and its interaction with its cell surface receptor CD44 plays an important role in mediating pathogenic mechanisms in SLE. This paper discusses the putative mechanisms through which hyaluronan and CD44 contribute to the pathogenesis of SLE, with particular emphasis on lupus nephritis.
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Sackstein R. The biology of CD44 and HCELL in hematopoiesis: the 'step 2-bypass pathway' and other emerging perspectives. Curr Opin Hematol 2011; 18:239-48. [PMID: 21546828 DOI: 10.1097/moh.0b013e3283476140] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
PURPOSE OF REVIEW The homing and egress of hematopoietic stem and progenitor cells (HSPCs) to and from marrow, respectively, and the proliferation and differentiation of HSPCs within marrow are complex processes critically regulated by the ordered expression and function of adhesion molecules that direct key cell-cell and cell-matrix interactions. The integral membrane molecule CD44, known primarily for its role in binding hyaluronic acid, is characteristically expressed on HSPCs. Conspicuously, human HSPCs uniquely display a specialized glycoform of CD44 known as hematopoietic cell E-/L-selectin ligand (HCELL), which is the most potent ligand for both E-selectin and L-selectin expressed on human cells. This review focuses on recent advances in our understanding of the biology of CD44 and HCELL in hematopoiesis. RECENT FINDINGS New data indicate that CD44-mediated events in hematopoiesis are more complex than previously imagined. Ex-vivo glycan engineering has established that HCELL serves as a 'bone marrow homing receptor'. Moreover, biochemical studies now show that CD44 forms bimolecular complexes with a variety of membrane proteins, one of which is VLA-4. Engagement of CD44 or of HCELL directly induces VLA-4 activation via G-protein-dependent signaling, triggering a 'step 2-bypass pathway' of cell migration, and extravascular lodgment, in absence of chemokine receptor engagement. SUMMARY Recent studies have further clarified the roles of CD44 and its glycoform HCELL in hematopoietic processes, providing key insights on how targeting these molecules may be beneficial in promoting hematopoiesis and in treating hematologic malignancies.
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Affiliation(s)
- Robert Sackstein
- Department of Dermatology, Brigham and Women's Hospital, Harvard Skin Disease Research Center, Harvard Medical School, Boston, Massachusetts 02115, USA.
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Wnt inhibitory factor 1 induces apoptosis and inhibits cervical cancer growth, invasion and angiogenesis in vivo. Oncogene 2011; 31:2725-37. [PMID: 22002305 DOI: 10.1038/onc.2011.455] [Citation(s) in RCA: 107] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Aberrant activation of Wingless-type (Wnt)/β-catenin signaling is widespread in human cervical cancer. However, the underlying mechanisms of Wnt activation and the therapeutic potential of Wnt inhibition remain largely unknown. Here, we demonstrate that the Wnt inhibitory factor 1 (WIF1), a secreted Wnt antagonist, is downregulated in all human primary cervical tumors and cell lines analyzed. Our data reveal that WIF1 downregulation occurs due to promoter hypermethylation and is an early event in cervical oncogenesis. WIF1 re-expression upon 5-aza-2'-deoxycytidine treatment or WIF1 gene transfer induces significant apoptosis and G(2)/M arrest, and inhibits cervical cancer cell proliferation in vitro. Consistent with this, treatment of established mice tumor xenografts with peritumoral WIF1 gene transfer results in a significant inhibition of cancer growth and invasion. WIF1 treatment causes a significant decrease in intracellular WNT1 and TCF-4 proteins revealing novel Wnt-regulatory mechanisms. Thus, WIF1 causes a major cellular re-distribution of β-catenin and a significant inhibition of the Wnt/β-catenin pathway in tumor cells, as documented by a remarkable reversion in the expression of Wnt/β-catenin transcriptional target genes (E-cadherin, c-Myc, cyclin D1, CD44 and VEGF). Consequently, multiple critical events in tumor progression and metastasis such as cell proliferation, angiogenesis and invasion were inhibited by WIF1. In addition, WIF1 modulated the expression of specific anti-apoptotic and apoptotic proteins, thereby inducing significant apoptosis in vivo. Our findings demonstrate for the first time that WIF1 downregulation by epigenetic gene silencing is an important mechanism of Wnt activation in cervical oncogenesis. Of major clinical relevance, we show that peritumoral WIF1 gene transfer reduces not only cancer growth but also invasion in well-established tumors. Therefore, our data provide novel mechanistic insights into the role of WIF1 in cervical cancer progression, and the important preclinical validation of WIF1 as a potent drug target in cervical cancer treatment.
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Rambaruth NDS, Dwek MV. Cell surface glycan-lectin interactions in tumor metastasis. Acta Histochem 2011; 113:591-600. [PMID: 21501858 DOI: 10.1016/j.acthis.2011.03.001] [Citation(s) in RCA: 60] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2011] [Revised: 02/28/2011] [Accepted: 03/01/2011] [Indexed: 02/07/2023]
Abstract
The development of secondary cancers, metastases, requires that a multitude of events are completed in an ordered and sequential manner. This review focuses on the role of cell surface glycans and their binding partners in the metastatic process. A common feature of metastasis is that the steps require adhesive interactions; many of these are mediated by cell surface glycans and their interactions with endogenous carbohydrate binding proteins (lectins). Aberrant glycosylation is a key feature of malignant transformation and the glycans involved influence the adhesive interactions of cancer cells often providing favorable conditions for tumor dissemination. This review focuses on glycans on the cancer cell surface and their association with endogenous lectins. In particular, E-cadherin and siglec-mediated disaggregation of tumor cells from the primary tumor mass; integrins, laminin and CD44-mediated invasion and migration of tumor cells through the connective tissue; the involvement of heparan sulphate in tumor angiogenesis and C-/S-type lectin interactions with the vasculature. The potential role of glycans in cancer cell evasion of immune surveillance is considered.
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Affiliation(s)
- Neela D S Rambaruth
- Department of Molecular and Applied Biosciences, University of Westminster, London, United Kingdom
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Rottlaender A, Villwock H, Addicks K, Kuerten S. Neuroprotective role of fibroblast growth factor-2 in experimental autoimmune encephalomyelitis. Immunology 2011; 133:370-8. [PMID: 21564095 DOI: 10.1111/j.1365-2567.2011.03450.x] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022] Open
Abstract
The role of fibroblast growth factor-2 (FGF-2) in multiple sclerosis and its animal model experimental autoimmune encephalomyelitis is discussed. This study is the first to use FGF-2(-/-) mice to further address the involvement of FGF-2 in the disease process. We demonstrate that immunization with myelin oligodendrocyte glycoprotein peptide 35-55 induces more severe experimental autoimmune encephalomyelitis in FGF-2(-/-) mice compared with FGF-2(+/+) mice. The antigen-specific cytokine response to myelin oligodendrocyte glycoprotein peptide and the degree of central nervous system inflammation was similar in both groups. However, FGF-2(-/-) mice displayed increased infiltration of CD8(+) T cells and macrophages/microglia. In addition, nerve fibre degeneration and axonal loss were augmented, whereas the extent of remyelination in central nervous system lesions was reduced. FGF-2 has been associated with the induction of demyelination and the inhibition of myelin production by oligodendrocytes. Our study supports the opposing notion that FGF-2 can also assert a neuroprotective function. This may be particularly appealing when it comes to targeting the neurodegenerative aspect of multiple sclerosis.
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Intragraft tubular vimentin and CD44 expression correlate with long-term renal allograft function and interstitial fibrosis and tubular atrophy. Transplantation 2010; 90:502-9. [PMID: 20588206 DOI: 10.1097/tp.0b013e3181e86b42] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
BACKGROUND Development of interstitial fibrosis and tubular atrophy (IF/TA) is the main histologic feature involved in renal allograft deterioration. The aim of this study was to validate whether de novo tubular expression of CD44 (transmembrane glycoprotein) and vimentin (mesenchymal cell marker), both involved in renal fibrosis, can operate as surrogate markers for late IF/TA and renal function. Furthermore, we wanted to establish the interrater reproducibility for the scoring system, which can be a problem in histologic assessments. METHODS Six-month protocol renal allograft biopsies (n=30 for matching 12 months estimated glomerular filtration rate (eGFR) from which 20 matched the 12-month protocol biopsy) were immunostained for CD44 and vimentin, semiquantitatively scored by three observers of two centers, and correlated with IF/TA and eGFR at 12 months. RESULTS The interobserver agreement was excellent for CD44 (Kendall's W-coefficient: 0.69; P<0.001) and vimentin (Kendall's W-coefficient: 0.79; P<0.001). CD44 and vimentin expression at 6 months were significantly correlated with IF/TA (rho=0.481 for CD44 and rho=0.619 for vimentin) and eGFR (rho=-0.569 for CD44 and rho=-0.376 for vimentin) at 12 months. CONCLUSIONS Summarizing, de novo tubular expression of CD44 and vimentin can function as surrogate marker for IF/TA and eGFR at 12 months. Further area under receiver operator characteristic curve analysis has to establish the predictive value for both biomarkers.
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Cicero AF, Ertek S. Preclinical and clinical evidence of nephro- and cardiovascular protective effects of glycosaminoglycans. Arch Med Sci 2010; 6:469-77. [PMID: 22371788 PMCID: PMC3284059 DOI: 10.5114/aoms.2010.14456] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/05/2009] [Revised: 06/15/2009] [Accepted: 10/17/2009] [Indexed: 01/27/2023] Open
Abstract
Despite advances in pharmacological treatment, diabetic nephropathy is still the leading cause of end-stage renal disease and an important cause of morbidity and mortality in diabetics. Glycosaminoglycans are long, unbranched mucopolysaccharides that play an important role in establishing a charge-selective barrier that restricts the passage of negatively charged molecules, such as albumin and other proteins, at the level of the glomerular basal membrane. Their loss is associated with loss of selectivity and proteinuria. Extensive preclinical evidence and some clinical trials suggest that glycosaminoglycans replacement is associated with improvement of glomerular selectivity and of proteinuria. Sulodexide could also have some other effects, potentially useful to reduce the renal damage and the cardiovascular disease associated with proteinuria, such as improvement of haemorheological and blood lipid parameters, an endothelium protective effect and anti-inflammatory action. This review will discuss the evidence supporting the potential nephroprotective effects of sulodexide and other glycosaminoglycans.
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Affiliation(s)
- Arrigo F. Cicero
- Hypertension Research Unit, Internal Medicine, Aging and Kidney Diseases Department, Alma Mater Studiorum University of Bologna, Italy
| | - Sibel Ertek
- Endocrinology and Metabolic Diseases Department, Ufuk University, Ankara, Turkey
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40
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CD44, a therapeutic target for metastasising tumours. Eur J Cancer 2010; 46:1271-7. [PMID: 20303742 DOI: 10.1016/j.ejca.2010.02.024] [Citation(s) in RCA: 354] [Impact Index Per Article: 25.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2010] [Accepted: 02/16/2010] [Indexed: 12/11/2022]
Abstract
Members of the CD44 family of transmembrane glycoproteins, in particular CD44v6 isoforms, were shown to be metastatic determinants of rat pancreatic tumour cells back in the early 1990s. Furthermore, the expression of several CD44 proteins correlates with aggressive stages of various human cancers. Because of the frequent and homogeneous expression of CD44v6 isoforms in squamous cell carcinoma, antibodies recognising these proteins were used in clinical trials for patients suffering from head and neck squamous cell carcinoma (HNSCC). Although the phase I clinical trials looked promising, the studies were abruptly ended after the death of a patient. Despite the termination of the trials, CD44 certainly remains a valid target for anti-cancer therapy. In this review, alternative strategies targeting CD44 functions are presented. These functions include the binding to hyaluronan (HA), the collaboration with osteopontin and the contribution of CD44 isoforms to receptor tyrosine kinase (RTKs) activation. These new attempts led to the development of peptides that interfere for example with HA binding and that might be used to induce apoptosis in mammary carcinoma or to prevent homing of leukaemia stem cells. Other peptides block RTK activation and thereby inhibit tumour angiogenesis and metastatic spread.
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Abstract
From the earliest studies with epithelial cells implanted into detrusor muscle to later experiments on smooth muscle in defined collagen gels, cell niche and extracellular matrix (ECM) have been clearly shown to orchestrate cellular behavior and fate whether quiescent, migratory, or proliferative. Normal matrix can revert transformed cells to quiescence, and damaged matrix can trigger malignancy or dedifferentiation. ECM influence in disease, development, healing and regeneration has been demonstrated in many other fields of study, but a thorough examination of the roles of ECM in bladder cell activity has not yet been undertaken. Structural ECM proteins, in concert with adhesive proteins, provide crucial structural support to the bladder. Both structural and nonstructural components of the bladder have major effects on smooth muscle function, through effects on matrix rigidity and signaling through ECM receptors. While many ECM components and receptors identified in the bladder have specific known functions in the vascular smooth musculature, their function in the bladder is often less well defined. In cancer and obstructive disease, the ECM has a critical role in pathogenesis. The challenge in these settings will be to find therapies that prevent hyperproliferation and encourage proper differentiation, through an understanding of matrix effects on cell biology and susceptibility to therapeutics.
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Abstract
A specific splice variant of the CD44 cell- surface protein family, CD44v6, has been shown to act as a coreceptor for the receptor tyrosine kinase c-Met on epithelial cells. Here we show that also on endothelial cells (ECs), the activity of c-Met is dependent on CD44v6. Furthermore, another receptor tyrosine kinase, VEGFR-2, is also regulated by CD44v6. The CD44v6 ectodomain and a small peptide mimicking a specific extracellular motif of CD44v6 or a CD44v6-specific antibody prevent CD44v6-mediated receptor activation. This indicates that the extracellular part of CD44v6 is required for interaction with c-Met or VEGFR-2. In the cytoplasm, signaling by activated c-Met and VEGFR-2 requires association of the CD44 carboxy-terminus with ezrin that couples CD44v6 to the cytoskeleton. CD44v6 controls EC migration, sprouting, and tubule formation induced by hepatocyte growth factor (HGF) or VEGF-A. In vivo the development of blood vessels from grafted EC spheroids and angiogenesis in tumors is impaired by CD44v6 blocking reagents, suggesting that the coreceptor function of CD44v6 for c-Met and VEGFR-2 is a promising target to block angiogenesis in pathologic conditions.
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Kaur C, Sivakumar V, Yip GW, Ling EA. Expression of syndecan-2 in the amoeboid microglial cells and its involvement in inflammation in the hypoxic developing brain. Glia 2009; 57:336-49. [PMID: 18803305 DOI: 10.1002/glia.20764] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
The present study examined the expression of heparan sulphate proteoglycan, syndecan-2 (Sdc-2) in the corpus callosum and the amoeboid microglial cells (AMC) in the neonatal rat brain in response to hypoxia. In 1-day old Wistar rats subjected to hypoxia the mRNA and protein expression of Sdc-2 in the corpus callosum, heavily populated by AMC, was increased up to 3 days after the hypoxic exposure. Immunoexpression of Sdc-2 was localized in AMC as confirmed by double labeling using microglial marker. Primary cultures of microglial cells subjected to hypoxia showed a significant increase in Sdc-2 expression. Application of Sdc-2 to microglial cultures under hypoxia increased the release of tumor necrosis factor-alpha, interleukin-1beta, chemokine (C-C motif) ligand 2 (CCL2), and chemokine (C-X-C motif) ligand 12 (CXCL12) by the microglial cells. Additionally, Sdc-2 enhanced the production of reactive oxygen species (ROS) by microglia subjected to hypoxia. Edaravone [3-methyl-1phenyl-2-pyrazolin-5-one], an antioxidant drug, suppressed the hypoxia- and Sdc-2-induced increased production of cytokines, chemokines, and ROS. In the light of these findings, we suggest that Sdc-2 plays an important role in microglial production of inflammatory cytokines, chemokines, and ROS in hypoxic conditions. In this connection, edaravone suppressed the hypoxia- and Sdc-2-induced increased cytokine and ROS production suggesting its therapeutic potential in ameliorating neuroinflammation.
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Affiliation(s)
- C Kaur
- Department of Anatomy, Yong Loo Lin School of Medicine, National University of Singapore, Singapore 117597.
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44
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Abstract
The cause of metastasis remains elusive despite vast information on cancer cells. We posit that cancer cell fusion with macrophages or other migratory bone marrow-derived cells (BMDCs) provides an explanation. BMDCs fused with tumor cells were present in animal tumor xenografts where they were associated with metastases. In myeloma patients, transcriptionally active myeloma nuclei were incorporated into osteoclasts through fusion. In patients with renal cell carcinoma arising poststem cell transplant, donor genes were incorporated in recipient cancer cell nuclei, most likely through fusion, and showed tumor distribution patterns characteristic of cancer stem cells. Melanoma-macrophage hybrids generated in vitro contained chromosomes from both parental partners, showed increased ploidy, and transcribed and translated genes from both parents. They exhibited chemotactic migration in vitro toward fibronectin and exhibited high frequencies of metastasis when implanted in mice. They produced macromolecules that are characteristic of macrophages and known indicators of metastasis (c-Met, SPARC, MCR1, GnT-V, and the integrin subunits alpha(3), alpha(5), alpha(6), alpha(v), beta(1), beta(3)). They also produced high levels of beta1,6-branched oligosaccharides-predictors of poor survival in patients with melanoma or carcinomas of the breast, lung, and colon. We thus hypothesize that such gene expression patterns in cancer are generated through fusion. Tumor hybrids also showed active autophagy, a characteristic of both metastatic cancers and macrophages. BMDC-tumor cell fusion explains epidermal-mesenchymal transition in cancer since BMDCs express mesodermal traits and epithelial-mesenchymal transition regulators (Twist, SPARC, and others). If BMDC-tumor cell fusion underlies invasion and metastasis in human cancer, new approaches for therapeutic intervention would be mandated.
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Affiliation(s)
- John M Pawelek
- Department of Dermatology and the Yale Cancer Center, Yale University School of Medicine, New Haven, Connecticut, USA
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Chaiyarit P, Thongprasom K, Satayut S, Dhanuthai K, Piboonratanakit P, Phothipakdee P, Subarnbhesaj A, Limlertmongkol S, Chaimusig M. Alteration of the expression of CD44 [corrected] isoforms in oral epithelia and saliva from patients with oral lichen planus. J Clin Immunol 2007; 28:26-34. [PMID: 17846873 DOI: 10.1007/s10875-007-9128-5] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2007] [Accepted: 08/14/2007] [Indexed: 10/22/2022]
Abstract
Oral lichen planus (OLP) is a chronic inflammatory mucosal disease that cell-mediated immunological mechanisms are involved in pathogenesis. The objective of this study was to investigate the expression of CD44 isoforms including CD44s, CD44v5, and CD44v6 in biopsy specimens and saliva from OLP patients. Thirty-one OLP patients and 30 healthy subjects were enrolled in this study. Immunohistochemical methods were used to detect the expression of CD44 isoforms in oral epithelia, and enzyme-linked immunosorbent assay (ELISA) was performed to measure levels of salivary CD44 isoforms. Our results demonstrated that expression of CD44v6 in oral epithelia from OLP patients was significantly decreased in comparison to controls (p = 0.021). Levels of salivary CD44s and CD44v5 from OLP patients were significantly higher than those from controls (p = 0.007 and p = 0.002, respectively). In summary, our findings provided additional evidence that the pathological stress, such as chronic inflammation, altered the expression of CD44 isoforms in oral epithelia and saliva of OLP patients.
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Affiliation(s)
- Ponlatham Chaiyarit
- Department of Oral Diagnosis, Faculty of Dentistry, Khon Kaen University, Khon Kaen 40002, Thailand.
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Pakula R, Melchior A, Denys A, Vanpouille C, Mazurier J, Allain F. Syndecan-1/CD147 association is essential for cyclophilin B-induced activation of p44/42 mitogen-activated protein kinases and promotion of cell adhesion and chemotaxis. Glycobiology 2007; 17:492-503. [PMID: 17267519 DOI: 10.1093/glycob/cwm009] [Citation(s) in RCA: 70] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
Many of the biological functions attributed to cell surface proteoglycans are dependent on the interaction with extracellular mediators through their heparan sulphate (HS) moieties and the participation of their core proteins in signaling events. A class of recently identified inflammatory mediators is secreted cyclophilins, which are mostly known as cyclosporin A-binding proteins. We previously demonstrated that cyclophilin B (CyPB) triggers chemotaxis and integrin-mediated adhesion of T lymphocytes mainly of the CD4+/CD45RO+ phenotype. These activities are related to interactions with two types of binding sites, CD147 and cell surface HS. Here, we demonstrate that CyPB-mediated adhesion of CD4+/CD45RO+ T cells is related to p44/42 mitogen-activated protein kinase (MAPK) activation by a mechanism involving CD147 and HS proteoglycans (HSPG). Although HSPG core proteins are represented by syndecan-1, -2, -4, CD44v3 and betaglycan in CD4+/CD45RO+ T cells, we found that only syndecan-1 is physically associated with CD147. The intensity of the heterocomplex increased in response to CyPB, suggesting a transient enhancement and/or stabilization in the association of CD147 to syndecan-1. Pretreatment with anti-syndecan-1 antibodies or knockdown of syndecan-1 expression by RNA interference dramatically reduced CyPB-induced p44/p42 MAPK activation and consequent migration and adhesion, supporting the model in which syndecan-1 serves as a binding subunit to form the fully active receptor of CyPB. Altogether, our findings provide a novel example of a soluble mediator in which a member of the syndecan family plays a critical role in efficient interaction with signaling receptors and initiation of cellular responses.
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Affiliation(s)
- Rachel Pakula
- Laboratory of Molecular and Cellular Biophysics, National Institute of Child Health and Human Development, Bethesda, MD 20892, USA
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48
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Pizzi MA, Crowe MJ. Matrix metalloproteinases and proteoglycans in axonal regeneration. Exp Neurol 2006; 204:496-511. [PMID: 17254568 DOI: 10.1016/j.expneurol.2006.12.012] [Citation(s) in RCA: 52] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2006] [Revised: 12/12/2006] [Accepted: 12/14/2006] [Indexed: 12/13/2022]
Abstract
After an injury to the adult mammalian central nervous system (CNS), a variety of growth-inhibitory molecules are upregulated. A glial scar forms at the site of injury and is composed of numerous molecular substances, including chondroitin sulfate proteoglycans (CSPGs). These proteoglycans inhibit axonal growth in vitro and in vivo. Matrix metalloproteinases (MMPs) can degrade the core protein of some CSPGs as well as other growth-inhibitory molecules such as Nogo and tenascin-C. MMPs have been shown to facilitate axonal regeneration in the adult mammalian peripheral nervous system (PNS). This review will focus on the various roles of proteoglycans and MMPs within the injured nervous system. First, we will present a general background on the injured central nervous system and explore the roles that proteoglycans play in the injured PNS and CNS. Second, we will discuss the various functions of MMPs within the injured PNS and CNS. Special attention will be paid to the possibility of how MMPs might modify the growth-inhibitory extracellular environment of the injured adult mammalian spinal cord and facilitate axonal regeneration in the CNS.
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Affiliation(s)
- Michael A Pizzi
- Department of Cell Biology, Neurobiology and Anatomy, Medical College of Wisconsin, Zablocki VAMC, 5000 West National Avenue, Milwaukee, WI 53295, USA
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Rouschop KMA, Sylva M, Teske GJD, Hoedemaeker I, Pals ST, Weening JJ, van der Poll T, Florquin S. Urothelial CD44 FacilitatesEscherichia coliInfection of the Murine Urinary Tract. THE JOURNAL OF IMMUNOLOGY 2006; 177:7225-32. [PMID: 17082640 DOI: 10.4049/jimmunol.177.10.7225] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Escherichia coli is the most common pathogen found in urinary tract infections (UTIs), mainly affecting children and women. We report that CD44, a hyaluronic acid (HA) binding protein that mediates cell-cell and cell-matrix interactions, facilitates the interaction of E. coli with urothelial cells and thus the infection of the host. We found that CD44 is constitutively expressed on urothelial cells and that HA accumulates in E. coli-induced UTI. In CD44-deficient mice, the bacterial outgrowth was dramatically less compared with wild-type mice despite similar granulocyte influx in the bladder and in the kidney as well as comparable cytokines/chemokines levels in both genotypes. E. coli was able to bind HA, which adhered to CD44-positive tubular epithelial cells. Most importantly, the interaction of CD44 on tubular epithelial cells with HA facilitated the migration of E. coli through the epithelial monolayer. The results provide evidence that CD44 on urothelial cells facilitates E. coli UTI. Disruption of the interaction between CD44 and HA in the bladder may provide a new approach to prevent and to treat UTI.
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Affiliation(s)
- Kasper M A Rouschop
- Department of Pathology, Academic Medical Center, University of Amsterdam, Amsterdam, The Netherlands.
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50
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Bausch SB. Potential roles for hyaluronan and CD44 in kainic acid-induced mossy fiber sprouting in organotypic hippocampal slice cultures. Neuroscience 2006; 143:339-50. [PMID: 16949761 DOI: 10.1016/j.neuroscience.2006.07.037] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2006] [Revised: 06/23/2006] [Accepted: 07/25/2006] [Indexed: 10/24/2022]
Abstract
The most well-documented synaptic rearrangement associated with temporal lobe epilepsy is mossy fiber sprouting (MFS). MFS is a pronounced expansion of granule cell mossy fiber axons into the inner dentate molecular layer. The recurrent excitatory network formed by MFS is hypothesized to play a critical role in epileptogenesis, which is the transformation of the normal brain into one that is prone to recurrent spontaneous seizures. While many studies have focused on the functional consequences of MFS, relatively few have investigated the molecular mechanisms underlying the increased propensity of mossy fibers to invade the inner molecular layer. We hypothesized that changes in two components of the extracellular matrix, hyaluronan and its primary receptor, CD44, contribute to MFS. Hyaluronan contributes to laminar-specificity in the hippocampus and increases in hyaluronan and CD44 are associated with temporal lobe epilepsy. We tested our hypothesis in an in vitro model of MFS using a combination of histological and biochemical approaches. Application of kainic acid (KA) to organotypic hippocampal slice cultures induced robust MFS into the inner dentate molecular layer compared with vehicle-treated controls. Degradation of hyaluronan with hyaluronidase significantly reduced but did not eliminate KA-induced MFS, suggesting that hyaluronan played a permissive role in MFS, but that loss of hyaluronan signaling alone was not sufficient to block mossy fiber reorganization. Comparison of CD44 expression with MFS revealed that when CD44 expression in the molecular layers was high, MFS was minimal and when CD44 expression/function was reduced following KA treatment or with function blocking antibodies, MFS was increased. The time course of KA-induced reductions in CD44 expression was identical to the temporal progression of KA-induced MFS reported previously in hippocampal slice cultures, suggesting that reduced CD44 expression may help promote MFS. Understanding the molecular mechanisms underlying MFS may lead to therapeutic interventions that limit epileptogenesis.
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Affiliation(s)
- S B Bausch
- Department of Pharmacology, Uniformed Services University, Room C2007, 4301 Jones Bridge Road, Bethesda, MD 20814-4799, USA.
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