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Jang I, Menon S, Indra I, Basith R, Beningo KA. Calpain Small Subunit Mediated Secretion of Galectin-3 Regulates Traction Stress. Biomedicines 2024; 12:1247. [PMID: 38927454 PMCID: PMC11200796 DOI: 10.3390/biomedicines12061247] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2024] [Revised: 05/29/2024] [Accepted: 05/30/2024] [Indexed: 06/28/2024] Open
Abstract
The complex regulation of traction forces (TF) produced during cellular migration remains poorly understood. We have previously found that calpain 4 (Capn4), the small non-catalytic subunit of the calpain 1 and 2 proteases, regulates the production of TF independent of the proteolytic activity of the larger subunits. Capn4 was later found to facilitate tyrosine phosphorylation and secretion of the lectin-binding protein galectin-3 (Gal3). In this study, recombinant Gal3 (rGal3) was added to the media-enhanced TF generated by capn4-/- mouse embryonic fibroblasts (MEFs). Extracellular Gal3 also rescued defects in the distribution, morphology, and adhesive strength of focal adhesions present in capn4-/- MEF cells. Surprisingly, extracellular Gal3 does not influence mechanosensing. c-Abl kinase was found to affect Gal3 secretion and the production of TF through phosphorylation of Y107 on Gal3. Our study also suggests that Gal3-mediated regulation of TF occurs through signaling pathways triggered by β1 integrin but not by focal adhesion kinase (FAK) Y397 autophosphorylation. Our findings provide insights into the signaling mechanism by which Capn4 and secreted Gal3 regulate cell migration through the modulation of TF distinctly independent from a mechanosensing mechanism.
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Affiliation(s)
| | | | | | | | - Karen A. Beningo
- Department of Biological Sciences, Wayne State University, Detroit, MI 48202, USA; (I.J.)
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2
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Funkhouser AT, Strigenz AM, Blair BB, Miller AP, Shealy JC, Ewing JA, Martin JC, Funk CR, Edenfield WJ, Blenda AV. KIT Mutations Correlate with Higher Galectin Levels and Brain Metastasis in Breast and Non-Small Cell Lung Cancer. Cancers (Basel) 2022; 14:cancers14112781. [PMID: 35681762 PMCID: PMC9179545 DOI: 10.3390/cancers14112781] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2022] [Revised: 05/26/2022] [Accepted: 06/02/2022] [Indexed: 11/16/2022] Open
Abstract
To investigate a potential role for galectins as biomarkers that enable diagnosis or prognostication of breast or non-small cell lung cancer, the serum levels of galectins -1, -3, -7, -8, and -9 of cancer patients determined by ELISA assays were compared to the mutation status of 50 known cancer-critical genes, which were determined using multiplex PCR in tumors of the same patients. Mutations in the KIT proto-oncogene, which codes for the c-Kit protein, a receptor tyrosine kinase, correlated with higher levels of galectins -1, -3, -8, and -9 in breast cancer patients and galectin-1 in non-small cell lung cancer patients. Mutations in the KIT gene were more likely found in brain metastases from both of these primary cancers. The most common KIT mutation in our panel was p.M541L, a missense mutation in the transmembrane domain of the c-Kit protein. These results demonstrate an association between KIT oncogenic signaling and elevated serum galectins in patients with metastatic disease. Changes in protein trafficking and the glycocalyx composition of cancer cells may explain the observed alterations in galectin expression. This study can be useful for the targeted selection of receptor tyrosine kinase and galectin inhibitor anti-cancer treatments.
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Affiliation(s)
- Avery T Funkhouser
- Department of Biomedical Sciences, University of South Carolina School of Medicine Greenville, Greenville, SC 29605, USA
| | - Alexander M Strigenz
- Department of Biomedical Sciences, University of South Carolina School of Medicine Greenville, Greenville, SC 29605, USA
| | - Bailey B Blair
- Department of Biomedical Sciences, University of South Carolina School of Medicine Greenville, Greenville, SC 29605, USA
| | - Andrew P Miller
- Department of Biomedical Sciences, University of South Carolina School of Medicine Greenville, Greenville, SC 29605, USA
| | - Jonah C Shealy
- Department of Biomedical Sciences, University of South Carolina School of Medicine Greenville, Greenville, SC 29605, USA
| | - Joseph A Ewing
- Data Support Core, Prisma Health, Greenville, SC 29605, USA
| | - Julie C Martin
- Prisma Health Cancer Institute, Prisma Health, Greenville, SC 29605, USA
| | - Christopher R Funk
- Department of Hematology and Medical Oncology, Emory University School of Medicine, Atlanta, GA 30322, USA
| | | | - Anna V Blenda
- Department of Biomedical Sciences, University of South Carolina School of Medicine Greenville, Greenville, SC 29605, USA
- Prisma Health Cancer Institute, Prisma Health, Greenville, SC 29605, USA
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3
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Verkerke H, Dias-Baruffi M, Cummings RD, Arthur CM, Stowell SR. Galectins: An Ancient Family of Carbohydrate Binding Proteins with Modern Functions. METHODS IN MOLECULAR BIOLOGY (CLIFTON, N.J.) 2022; 2442:1-40. [PMID: 35320517 DOI: 10.1007/978-1-0716-2055-7_1] [Citation(s) in RCA: 22] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Galectins are a large family of carbohydrate binding proteins with members in nearly every lineage of multicellular life. Through tandem and en-mass genome duplications, over 15 known vertebrate galectins likely evolved from a single common ancestor extant in pre-chordate lineages. While galectins have divergently evolved numerous functions, some of which do not involve carbohydrate recognition, the vast majority of the galectins have retained the conserved ability to bind variably modified polylactosamine (polyLacNAc) residues on glycans that modify proteins and lipids on the surface of host cells and pathogens. In addition to their direct role in microbial killing, many proposed galectin functions in the immune system and cancer involve crosslinking glycosylated receptors and modifying signaling pathways or sensitivity to antigen from the outside in. However, a large body of work has uncovered intracellular galectin functions mediated by carbohydrate- and non-carbohydrate-dependent interactions. In the cytoplasm, galectins can tune intracellular kinase and G-protein-coupled signaling cascades important for nutrient sensing, cell cycle progression, and transformation. Particularly, but interconnected pathways, cytoplasmic galectins serve the innate immune system as sensors of endolysosomal damage, recruiting and assembling the components of autophagosomes during intracellular infection through carbohydrate-dependent and -independent activities. In the nucleus, galectins participate in pre-mRNA splicing perhaps through interactions with non-coding RNAs required for assembly of spliceosomes. Together, studies of galectin function paint a picture of a functionally dynamic protein family recruited during eons of evolution to regulate numerous essential cellular processes in the context of multicellular life.
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Affiliation(s)
- Hans Verkerke
- Joint Program in Transfusion Medicine, Department of Pathology, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, USA.,Harvard Glycomics Center, Harvard Medical School, Boston, MA, USA
| | - Marcelo Dias-Baruffi
- Department of Clinical Analysis, Toxicological and Bromatological, School of Pharmaceutical Sciences of Ribeirão Preto, University of São Paulo, Ribeirão Preto, Brazil
| | | | - Connie M Arthur
- Joint Program in Transfusion Medicine, Department of Pathology, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, USA.,Harvard Glycomics Center, Harvard Medical School, Boston, MA, USA
| | - Sean R Stowell
- Joint Program in Transfusion Medicine, Department of Pathology, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, USA. .,Harvard Glycomics Center, Harvard Medical School, Boston, MA, USA.
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4
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Galectins in Cancer and the Microenvironment: Functional Roles, Therapeutic Developments, and Perspectives. Biomedicines 2021; 9:biomedicines9091159. [PMID: 34572346 PMCID: PMC8465754 DOI: 10.3390/biomedicines9091159] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2021] [Revised: 08/26/2021] [Accepted: 08/31/2021] [Indexed: 12/15/2022] Open
Abstract
Changes in cell growth and metabolism are affected by the surrounding environmental factors to adapt to the cell’s most appropriate growth model. However, abnormal cell metabolism is correlated with the occurrence of many diseases and is accompanied by changes in galectin (Gal) performance. Gals were found to be some of the master regulators of cell–cell interactions that reconstruct the microenvironment, and disordered expression of Gals is associated with multiple human metabolic-related diseases including cancer development. Cancer cells can interact with surrounding cells through Gals to create more suitable conditions that promote cancer cell aggressiveness. In this review, we organize the current understanding of Gals in a systematic way to dissect Gals’ effect on human disease, including how Gals’ dysregulated expression affects the tumor microenvironment’s metabolism and elucidating the mechanisms involved in Gal-mediated diseases. This information may shed light on a more precise understanding of how Gals regulate cell biology and facilitate the development of more effective therapeutic strategies for cancer treatment by targeting the Gal family.
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Cunha EGC, de Lima CAD, Vilar KDM, Nóbrega MFD, Almeida ARD, Pereira MC, Dantas AT, Gonçalves RSG, Rêgo MJBDM, Duarte ALBP, Pitta MGDR. Genetic variants in LGALS3 are related to lower galectin-3 serum levels and clinical outcomes in systemic sclerosis patients: A case-control study. Autoimmunity 2021; 54:187-194. [PMID: 33973825 DOI: 10.1080/08916934.2021.1919881] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
INTRODUCTION Systemic sclerosis (SSc) is a rare complex disease characterized by vascular damage, autoimmunity, and extensive skin and internal organs fibrosis. Galectin-3 (Gal-3) is encoded by gene LGALS3 (Lectin, Galactoside-Binding, Soluble, 3; 14q22.3) and it has been reported to play a central role in self-tolerance, inflammation, and fibrosis. OBJECTIVE To investigate associations among LGALS3 single nucleotide polymorphisms (SNPs) and serum levels Gal-3 and SSc susceptibility and their clinical features. METHODS A case-control study with 88 patients and 151 matched controls was performed. LGALS3 variants were analyzed by the TaqMan real-time polymerase chain reaction (PCR) system whereas Gal-3 serum levels were measured by sandwich enzyme linked immunosorbent assay (ELISA). Associations among genotypes, clinical features, and Gal-3 levels were performed by univariable and multivariable analysis through statistical packages. RESULTS The LGALS3 rs4652 A/C genotype was more frequent in SSc patients than controls according to overdominant model [OR 1.89 (CI 95% 1.01 - 3.52); p = .046]. Also, LGALS3 rs4652 C/C polymorphic genotype was associated with lower patient Gal-3 levels (p = .03) and control group (p = 0.005), as noted by generalized linear model (GLM). The LGALS3 rs1009977 G/T controls showed higher Gal-3 levels than wild-type and polymorphic genotypes (p = .03); however, in SSc patients, no difference was found. None of the LGALS3 SNPs or Gal-3 levels was associated with clinical manifestations in SSc patients. Considering only the SSc group, GLM analysis pointed LGALS3 rs4652 and rs2075601, pulmonary arterial hypertension (PAH), myopathy, and health assessment questionnaire (HAQ) and scleroderma health assessment questionnaire (SHAQ) as important predictors for Gal-3 levels. CONCLUSION The LGALS3 rs4652 A/C was more frequent in SSc patients and related to lower Gal-3 levels. These findings were corroborated through a GLM to estimate Gal-3 values. Also, by model equations, Gal-3 levels may be predicted by HAQ, SHAQ, PAH, myopathy, and LGALS3 rs4652 and rs2075601 factors. In these ways, we suggest that galectins may be promising biomarkers to identify susceptibility to SSc as well as to identify HAQ, SHAQ, PAH, and myopathy outcomes.
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Affiliation(s)
- Eudes Gustavo Constantino Cunha
- Laboratório de Imunomodulação e Novas Abordagens Terapêuticas (LINAT), Núcleo de Pesquisa em Inovação Terapêutica - Suely Galdino (NUPIT-SG), Universidade Federal de Pernambuco (UFPE), Recife, PE, Brazil
| | | | - Kamila de Melo Vilar
- Laboratório de Imunomodulação e Novas Abordagens Terapêuticas (LINAT), Núcleo de Pesquisa em Inovação Terapêutica - Suely Galdino (NUPIT-SG), Universidade Federal de Pernambuco (UFPE), Recife, PE, Brazil
| | | | - Anderson Rodrigues de Almeida
- Laboratório de Imunomodulação e Novas Abordagens Terapêuticas (LINAT), Núcleo de Pesquisa em Inovação Terapêutica - Suely Galdino (NUPIT-SG), Universidade Federal de Pernambuco (UFPE), Recife, PE, Brazil
| | - Michelly Cristiny Pereira
- Laboratório de Imunomodulação e Novas Abordagens Terapêuticas (LINAT), Núcleo de Pesquisa em Inovação Terapêutica - Suely Galdino (NUPIT-SG), Universidade Federal de Pernambuco (UFPE), Recife, PE, Brazil
| | - Andréa Tavares Dantas
- Departmento de Reumatologia, Hospital das Clínicas da Universidade Federal de Pernambuco (HC-UFPE), Recife, PE, Brazil
| | | | - Moacyr Jesus Barreto de Melo Rêgo
- Laboratório de Imunomodulação e Novas Abordagens Terapêuticas (LINAT), Núcleo de Pesquisa em Inovação Terapêutica - Suely Galdino (NUPIT-SG), Universidade Federal de Pernambuco (UFPE), Recife, PE, Brazil
| | | | - Maira Galdino da Rocha Pitta
- Laboratório de Imunomodulação e Novas Abordagens Terapêuticas (LINAT), Núcleo de Pesquisa em Inovação Terapêutica - Suely Galdino (NUPIT-SG), Universidade Federal de Pernambuco (UFPE), Recife, PE, Brazil
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6
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Patel DM, Kitani Y, Korsnes K, Iversen MH, Brinchmann MF. A Truncated Galectin-3 Isolated from Skin Mucus of Atlantic Salmon Salmo salar Binds to and Modulates the Proteome of the Gram-Negative Bacteria Moritella viscosa. Mar Drugs 2020; 18:md18020102. [PMID: 32033203 PMCID: PMC7074318 DOI: 10.3390/md18020102] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2019] [Revised: 01/31/2020] [Accepted: 02/02/2020] [Indexed: 12/20/2022] Open
Abstract
The mucus of fish skin plays a vital role in innate immune defense. Some mucus proteins have the potential to incapacitate pathogens and/or inhibit their passage through the skin. In this study the aim was to isolate and characterize galectin(s), β-galactosides binding proteins, present in skin mucus. A novel short form of galectin-3 was isolated from Atlantic salmon skin mucus by α-lactose agarose based affinity chromatography followed by Sephadex G-15 gel filtration. Mass spectrometric analysis showed that the isolated protein was the C-terminal half of galectin-3 (galectin-3C). Galectin-3C showed calcium independent and lactose inhabitable hemagglutination, and agglutinated the Gram-negative pathogenic bacteria Moritella viscosa. Galectin-3 mRNA was highly expressed in skin and gill, followed by muscle, hindgut, spleen, stomach, foregut, head kidney, and liver. Moritella viscosa incubated with galectin-3C had a modified proteome. Proteins with changed abundance included multidrug transporter and three ribosomal proteins L7/12, S2, and S13. Overall, this study shows the isolation and characterization of a novel galectin-3 short form involved in pathogen recognition and modulation, and hence in immune defense of Atlantic salmon.
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Affiliation(s)
- Deepti Manjari Patel
- Faculty of Biosciences and Aquaculture, Nord University, 8049 Bodø, Norway; (D.M.P.); (Y.K.); (K.K.); (M.H.I.)
| | - Yoichiro Kitani
- Faculty of Biosciences and Aquaculture, Nord University, 8049 Bodø, Norway; (D.M.P.); (Y.K.); (K.K.); (M.H.I.)
- Noto Marine Laboratory, Division of Marine Environmental Studies, Institute of Nature and Environmental Technology, Kanazawa University, Noto-Cho, Ishikawa 927-0553, Japan
| | - Kjetil Korsnes
- Faculty of Biosciences and Aquaculture, Nord University, 8049 Bodø, Norway; (D.M.P.); (Y.K.); (K.K.); (M.H.I.)
| | - Martin Haugmo Iversen
- Faculty of Biosciences and Aquaculture, Nord University, 8049 Bodø, Norway; (D.M.P.); (Y.K.); (K.K.); (M.H.I.)
| | - Monica Fengsrud Brinchmann
- Faculty of Biosciences and Aquaculture, Nord University, 8049 Bodø, Norway; (D.M.P.); (Y.K.); (K.K.); (M.H.I.)
- Correspondence:
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7
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Gao X, Liu J, Liu X, Li L, Zheng J. Cleavage and phosphorylation: important post-translational modifications of galectin-3. Cancer Metastasis Rev 2018; 36:367-374. [PMID: 28378189 DOI: 10.1007/s10555-017-9666-0] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
As the unique chimeric member of the β-galactoside-binding protein family, galectin-3 is a multivalent and multifunctional oncogenic protein involved in multiple physiological and pathological processes, including cell growth, cell differentiation, cell adhesion, RNA splicing, cell apoptosis, and malignant transformation. Post-translational modifications can effectively increase a protein's functional diversity, either by degradation or adding chemical modifications, thus regulating activity, localization, and ligand interaction. In order to clearly understand the functional mechanisms of galectin-3 involved in normal cell biology and pathogenesis, here, we have summarized the previously reported post-translational modifications of galectin-3, including cleavage and phosphorylation. Cleavage of galectin-3 by MMPs, PSA, and proteases from parasites generated intact carbohydrate-recognition domain and N-terminal peptides of varying lengths that retained lectin binding activity but lost multivalence. Serine and tyrosine phosphorylation of galectin-3 by c-Abl, CKI, and GSK-3β could regulate its localization and associated signal transduction. Accordingly, cleavage and phosphorylation play an important role in regulating galectin-3 function via altering its multivalence, localization, and ligand interaction.
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Affiliation(s)
- Xiaoge Gao
- Cancer Institute, Xuzhou Medical University, Xuzhou, Jiangsu Province, 221002, People's Republic of China
| | - Jingjie Liu
- Cancer Institute, Xuzhou Medical University, Xuzhou, Jiangsu Province, 221002, People's Republic of China
| | - Xiangye Liu
- Jiangsu Province Key Laboratory of Immunity and Metabolism, Department of Pathogenic Biology and Immunology, Xuzhou Medical University, Xuzhou, Jiangsu Province, 221004, People's Republic of China
| | - Liantao Li
- Cancer Institute, Xuzhou Medical University, Xuzhou, Jiangsu Province, 221002, People's Republic of China.,Center of Clinical Oncology, Affiliated Hospital of Xuzhou Medical University, Xuzhou, Jiangsu Province, 221002, People's Republic of China
| | - Junnian Zheng
- Cancer Institute, Xuzhou Medical University, Xuzhou, Jiangsu Province, 221002, People's Republic of China. .,Center of Clinical Oncology, Affiliated Hospital of Xuzhou Medical University, Xuzhou, Jiangsu Province, 221002, People's Republic of China. .,Jiangsu Center for the Collaboration and Innovation of Cancer Biotherapy, Cancer Institute, Xuzhou Medical University, Xuzhou, Jiangsu Province, 221002, People's Republic of China.
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8
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Suthahar N, Meijers WC, Silljé HH, Ho JE, Liu FT, de Boer RA. Galectin-3 Activation and Inhibition in Heart Failure and Cardiovascular Disease: An Update. Theranostics 2018; 8:593-609. [PMID: 29344292 PMCID: PMC5771079 DOI: 10.7150/thno.22196] [Citation(s) in RCA: 155] [Impact Index Per Article: 25.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2017] [Accepted: 09/24/2017] [Indexed: 12/15/2022] Open
Abstract
Galectin-3 is a versatile protein orchestrating several physiological and pathophysiological processes in the human body. In the last decade, considerable interest in galectin-3 has emerged because of its potential role as a biotarget. Galectin-3 is differentially expressed depending on the tissue type, however its expression can be induced under conditions of tissue injury or stress. Galectin-3 overexpression and secretion is associated with several diseases and is extensively studied in the context of fibrosis, heart failure, atherosclerosis and diabetes mellitus. Monomeric (extracellular) galectin-3 usually undergoes further "activation" which significantly broadens the spectrum of biological activity mainly by modifying its carbohydrate-binding properties. Self-interactions of this protein appear to play a crucial role in regulating the extracellular activities of this protein, however there is limited and controversial data on the mechanisms involved. We therefore summarize (recent) literature in this area and describe galectin-3 from a binding perspective providing novel insights into mechanisms by which galectin-3 is known to be "activated" and how such activation may be regulated in pathophysiological scenarios.
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Affiliation(s)
- Navin Suthahar
- University Medical Center Groningen, University of Groningen, Department of Cardiology, PO Box 30.001, 9700 RB Groningen, the Netherlands
| | - Wouter C. Meijers
- University Medical Center Groningen, University of Groningen, Department of Cardiology, PO Box 30.001, 9700 RB Groningen, the Netherlands
| | - Herman H.W. Silljé
- University Medical Center Groningen, University of Groningen, Department of Cardiology, PO Box 30.001, 9700 RB Groningen, the Netherlands
| | - Jennifer E. Ho
- Massachusetts General Hospital, Cardiovascular Research Center, Boston, MA, USA
| | - Fu-Tong Liu
- Institute of Biomedical Sciences, Academia Sinica, Taipei, Taiwan
| | - Rudolf A. de Boer
- University Medical Center Groningen, University of Groningen, Department of Cardiology, PO Box 30.001, 9700 RB Groningen, the Netherlands
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9
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Liu B, Zhou Y, Lu D, Liu Y, Zhang SQ, Xu Y, Li W, Gu X. Comparison of the protein expression of calpain-1, calpain-2, calpastatin and calmodulin between gastric cancer and normal gastric mucosa. Oncol Lett 2017; 14:3705-3710. [PMID: 28927135 DOI: 10.3892/ol.2017.6617] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2015] [Accepted: 04/13/2017] [Indexed: 11/05/2022] Open
Abstract
The understanding of molecular mechanisms that are involved in the development and the progression of gastric cancer (GC) are of importance for the diagnosis and treatment. The calpain system, which contains the calpains and the endogenous inhibitor, has been suggested as an important factor in the tumorigenesis and migration of colorectal adenocarcinoma, breast and ovarian cancer, and as a prognostic marker for GC. However, the expression level of calpain system proteins in GC and normal-appearing peritumoral gastric mucosa remain unknown. The present study investigated the expression of calpain-1 (CAPN1), calpain-2 (CAPN2), calpastatin and calmodulin (CaM) in GC and uninvolved gastric mucosa tissues with immunohistochemistry. Results demonstrated that CAPN2 protein level increased in GCs compared with normal tissues, while calpastatin and CaM protein level decreased. No evident alterations were observed for CAPN1. Although the protein expression of all these four proteins was not in association with the clinical variables of GC in the present study, higher calpain enzyme activity could be a negative prognostic marker, since calpains are responsible for the generation of active forms of certain proteins that facilitate the progression of cancer. The ratio of (CAPN1 × CAPN2)/(calpastatin × CaM) may serve as a potential index for diagnosis of GC.
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Affiliation(s)
- Bide Liu
- College of Medicine, Yangzhou University, Yangzhou, Jiangsu 225001, P.R. China
| | - Yu Zhou
- College of Medicine, Yangzhou University, Yangzhou, Jiangsu 225001, P.R. China
| | - Dan Lu
- College of Clinical Medicine, Yangzhou University, Yangzhou, Jiangsu 225001, P.R. China.,Jiangsu Key Laboratory of Integrated Traditional Chinese and Western Medicine for Prevention and Treatment of Senile Diseases, Yangzhou, Jiangsu 225001, P.R. China
| | - Yong Liu
- School of Life Science and Medicine, Dalian University of Technology, Panjin, Liaoning 124221, P.R. China
| | - Si-Quan Zhang
- College of Medicine, Yangzhou University, Yangzhou, Jiangsu 225001, P.R. China
| | - Yan Xu
- College of Clinical Medicine, Yangzhou University, Yangzhou, Jiangsu 225001, P.R. China
| | - Wei Li
- College of Medicine, Yangzhou University, Yangzhou, Jiangsu 225001, P.R. China.,Jiangsu Key Laboratory of Integrated Traditional Chinese and Western Medicine for Prevention and Treatment of Senile Diseases, Yangzhou, Jiangsu 225001, P.R. China
| | - Xiao Gu
- College of Clinical Medicine, Yangzhou University, Yangzhou, Jiangsu 225001, P.R. China.,Jiangsu Key Laboratory of Integrated Traditional Chinese and Western Medicine for Prevention and Treatment of Senile Diseases, Yangzhou, Jiangsu 225001, P.R. China
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10
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Rao SP, Ge XN, Sriramarao P. Regulation of Eosinophil Recruitment and Activation by Galectins in Allergic Asthma. Front Med (Lausanne) 2017; 4:68. [PMID: 28620605 PMCID: PMC5450023 DOI: 10.3389/fmed.2017.00068] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2017] [Accepted: 05/18/2017] [Indexed: 12/30/2022] Open
Abstract
Eosinophils are differentiated granulocytes that are recruited from the bone marrow to sites of inflammation via the vascular system. Allergic asthma is characterized by the presence of large numbers of eosinophils in the lungs and airways. Due to their capacity to rapidly release inflammatory mediators such as cytokines, chemokines, growth factors, and cytotoxic granule proteins upon stimulation, eosinophils play a critical role in pro-inflammatory processes in allergen-exposed lungs. Identifying key players and understanding the molecular mechanisms directing eosinophil trafficking and recruitment to inflamed airways is a key to developing therapeutic strategies to limit their influx. Recent studies have brought to light the important role of glycans and glycan binding proteins in regulating recruitment of eosinophils. In addition to the role of previously identified eosinophil- and endothelial-expressed adhesion molecules in mediating eosinophil trafficking and recruitment to the inflamed airways, studies have also indicated a role for galectins (galectin-3) in this process. Galectins are mammalian lectins expressed by various cell types including eosinophils. Intracellularly, they can regulate biological processes such as cell motility. Extracellularly, galectins interact with β-galactosides in cell surface-expressed glycans to regulate cellular responses like production of inflammatory mediators, cell adhesion, migration, and apoptosis. Eosinophils express galectins intracellularly or on the cell surface where they interact with cell surface glycoconjugate receptors. Depending on the type (galectin-1, -3, etc.) and location (extracellular or intracellular, endogenous or exogenously delivered), galectins differentially regulate eosinophil recruitment, activation, and apoptosis and thus exert a pro- or anti-inflammatory outcome. Here, we have reviewed information pertaining to galectins (galectin-1, -3 -9, and -10) that are expressed by eosinophils themselves and/or other cells that play a role in eosinophil recruitment and function in the context of allergic asthma and their potential use as disease biomarkers or therapeutic targets for immunomodulation.
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Affiliation(s)
- Savita P Rao
- Department of Veterinary and Biomedical Sciences, University of Minnesota, St. Paul, MN, United States
| | - Xiao Na Ge
- Department of Veterinary and Biomedical Sciences, University of Minnesota, St. Paul, MN, United States
| | - P Sriramarao
- Department of Veterinary and Biomedical Sciences, University of Minnesota, St. Paul, MN, United States
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11
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Extracellular galectin-3 counteracts adhesion and exhibits chemoattraction in Helicobacter pylori-infected gastric cancer cells. Microbiology (Reading) 2016; 162:1360-1366. [DOI: 10.1099/mic.0.000322] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023] Open
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12
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Hu Y, Yéléhé-Okouma M, Ea HK, Jouzeau JY, Reboul P. Galectin-3: A key player in arthritis. Joint Bone Spine 2016; 84:15-20. [PMID: 27238188 DOI: 10.1016/j.jbspin.2016.02.029] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2015] [Accepted: 02/17/2016] [Indexed: 01/15/2023]
Abstract
Arthritis is more and more considered as the leading reason for the disability in the world, particularly regarding its main entities, rheumatoid arthritis and osteoarthritis. The common feature of arthritis is inflammation, which is mainly supported by synovitis (synovial inflammation), although the immune system plays a primary role in rheumatoid arthritis and a secondary one in osteoarthritis. During the inflammatory phase of arthritis, many pro-inflammatory cytokines and mediators are secreted by infiltrating immune and resident joint cells, which are responsible for cartilage degradation and excessive bone remodeling. Amongst them, a β-galactoside-binding lectin, galectin-3, has been reported to be highly expressed and secreted by inflamed synovium of rheumatoid arthritis and osteoarthritis patients. Furthermore, galectin-3 has been demonstrated to induce joint swelling and osteoarthritis-like lesions after intra-articular injection in laboratory animals. However, the mechanisms underlying its pathophysiological role in arthritis have not been fully elucidated. This review deals with the characterization of arthritis features and galectin-3 and summarizes our current knowledge of the contribution of galectin-3 to joint tissue lesions in arthritis.
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Affiliation(s)
- Yong Hu
- UMR 7365, CNRS, Université de Lorraine, IMoPA, Biopôle de l'Université de Lorraine, Campus Biologie-Santé, Faculté de Médecine, 9, avenue de la Forêt-de-Haye, CS50184, 54505 Vandœuvre-lès-Nancy cedex, France; Department of orthopedics, Renmin Hospital, Wuhan University, Wuhan 430060, China
| | - Mélissa Yéléhé-Okouma
- UMR 7365, CNRS, Université de Lorraine, IMoPA, Biopôle de l'Université de Lorraine, Campus Biologie-Santé, Faculté de Médecine, 9, avenue de la Forêt-de-Haye, CS50184, 54505 Vandœuvre-lès-Nancy cedex, France; Département de Pharmacologie Clinique et Toxicologie, CHRU de Nancy, 54035 Nancy, France
| | - Hang-Korng Ea
- Service de rhumatologie, Centre Viggo-Petersen, Pôle appareil locomoteur, Hôpital Lariboisière, AP-HP, 75010 Paris, France; Inserm UMR-S 1132 Bioscar, Sorbonne Paris Cité, Université Paris Diderot, 75013 Paris, France
| | - Jean-Yves Jouzeau
- UMR 7365, CNRS, Université de Lorraine, IMoPA, Biopôle de l'Université de Lorraine, Campus Biologie-Santé, Faculté de Médecine, 9, avenue de la Forêt-de-Haye, CS50184, 54505 Vandœuvre-lès-Nancy cedex, France; Département de Pharmacologie Clinique et Toxicologie, CHRU de Nancy, 54035 Nancy, France
| | - Pascal Reboul
- UMR 7365, CNRS, Université de Lorraine, IMoPA, Biopôle de l'Université de Lorraine, Campus Biologie-Santé, Faculté de Médecine, 9, avenue de la Forêt-de-Haye, CS50184, 54505 Vandœuvre-lès-Nancy cedex, France.
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13
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Cardoso ACF, Andrade LNDS, Bustos SO, Chammas R. Galectin-3 Determines Tumor Cell Adaptive Strategies in Stressed Tumor Microenvironments. Front Oncol 2016; 6:127. [PMID: 27242966 PMCID: PMC4876484 DOI: 10.3389/fonc.2016.00127] [Citation(s) in RCA: 55] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2016] [Accepted: 05/10/2016] [Indexed: 01/25/2023] Open
Abstract
Galectin-3 is a member of the β-galactoside-binding lectin family, whose expression is often dysregulated in cancers. While galectin-3 is usually an intracellular protein found in the nucleus and in the cytoplasm, under certain conditions, galectin-3 can be secreted by an yet unknown mechanism. Under stressing conditions (e.g., hypoxia and nutrient deprivation) galectin-3 is upregulated, through the activity of transcription factors, such as HIF-1α and NF-κB. Here, we review evidence that indicates a positive role for galectin-3 in MAPK family signal transduction, leading to cell proliferation and cell survival. Galectin-3 serves as a scaffold protein, which favors the spatial organization of signaling proteins as K-RAS. Upon secretion, extracellular galectin-3 interacts with a variety of cell surface glycoproteins, such as growth factor receptors, integrins, cadherins, and members of the Notch family, among other glycoproteins, besides different extracellular matrix molecules. Through its ability to oligomerize, galectin-3 forms lectin lattices that act as scaffolds that sustain the spatial organization of signaling receptors on the cell surface, dictating its maintenance on the plasma membrane or their endocytosis. Galectin-3 induces tumor cell, endothelial cell, and leukocyte migration, favoring either the exit of tumor cells from a stressed microenvironment or the entry of endothelial cells and leukocytes, such as monocytes/macrophages into the tumor organoid. Therefore, galectin-3 plays homeostatic roles in tumors, as (i) it favors tumor cell adaptation for survival in stressed conditions; (ii) upon secretion, galectin-3 induces tumor cell detachment and migration; and (iii) it attracts monocyte/macrophage and endothelial cells to the tumor mass, inducing both directly and indirectly the process of angiogenesis. The two latter activities are potentially targetable, and specific interventions may be designed to counteract the protumoral role of extracellular galectin-3.
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Affiliation(s)
- Ana Carolina Ferreira Cardoso
- Departamento de Radiologia e Oncologia, Faculdade de Medicina, Centro de Investigação Translacional em Oncologia, Instituto do Câncer do Estado de São Paulo, Universidade de São Paulo , São Paulo , Brasil
| | - Luciana Nogueira de Sousa Andrade
- Departamento de Radiologia e Oncologia, Faculdade de Medicina, Centro de Investigação Translacional em Oncologia, Instituto do Câncer do Estado de São Paulo, Universidade de São Paulo , São Paulo , Brasil
| | - Silvina Odete Bustos
- Departamento de Radiologia e Oncologia, Faculdade de Medicina, Centro de Investigação Translacional em Oncologia, Instituto do Câncer do Estado de São Paulo, Universidade de São Paulo , São Paulo , Brasil
| | - Roger Chammas
- Departamento de Radiologia e Oncologia, Faculdade de Medicina, Centro de Investigação Translacional em Oncologia, Instituto do Câncer do Estado de São Paulo, Universidade de São Paulo , São Paulo , Brasil
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Bum-Erdene K, Leffler H, Nilsson UJ, Blanchard H. Structural characterization of human galectin-4 C-terminal domain: elucidating the molecular basis for recognition of glycosphingolipids, sulfated saccharides and blood group antigens. FEBS J 2015; 282:3348-67. [DOI: 10.1111/febs.13348] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2015] [Revised: 06/04/2015] [Accepted: 06/12/2015] [Indexed: 01/09/2023]
Affiliation(s)
| | - Hakon Leffler
- Section MIG; Department of Laboratory Medicine; Lund University; Sweden
| | - Ulf J. Nilsson
- Centre for Analysis and Synthesis; Department of Chemistry; Lund University; Sweden
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15
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Thijssen VL, Heusschen R, Caers J, Griffioen AW. Galectin expression in cancer diagnosis and prognosis: A systematic review. Biochim Biophys Acta Rev Cancer 2015; 1855:235-47. [PMID: 25819524 DOI: 10.1016/j.bbcan.2015.03.003] [Citation(s) in RCA: 156] [Impact Index Per Article: 17.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2015] [Revised: 03/14/2015] [Accepted: 03/16/2015] [Indexed: 02/07/2023]
Abstract
Galectins are a family of proteins that bind to specific glycans thereby deciphering the information captured within the glycome. In the last two decades, several galectin family members have emerged as versatile modulators of tumor progression. This has initiated the development and preclinical assessment of galectin-targeting compounds. With the first compounds now entering clinical trials it is pivotal to gain insight in the diagnostic and prognostic value of galectins in cancer as this will allow a more rational selection of the patients that might benefit most from galectin-targeted therapies. Here, we present a systematic review of galectin expression in human cancer patients. Malignant transformation is frequently associated with altered galectin expression, most notably of galectin-1 and galectin-3. In most cancers, increased galectin-1 expression is associated with poor prognosis while elevated galectin-9 expression is emerging as a marker of favorable disease outcome. The prognostic value of galectin-3 appears to be tumor type dependent and the other galectins require further investigation. Regarding the latter, additional studies using larger patient cohorts are essential to fully unravel the diagnostic and prognostic value of galectin expression. Furthermore, to better compare different findings, consensus should be reached on how to assess galectin expression, not only with regard to localization within the tissue and within cellular compartments but also regarding alternative splicing and genomic variations. Finally, linking galectin expression and function to aberrant glycosylation in cancer cells will improve our understanding of how these versatile proteins can be exploited for diagnostic, prognostic and even therapeutic purposes in cancer patients.
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Affiliation(s)
- Victor L Thijssen
- Angiogenesis Laboratory, Department Medical Oncology, VU University Medical Center, Amsterdam, the Netherlands; Angiogenesis Laboratory, Department of Radiation Oncology, VU University Medical Center, Amsterdam, the Netherlands.
| | - Roy Heusschen
- Laboratory of Hematology, GIGA-Research, University of Liege, Liege, Belgium
| | - Jo Caers
- Laboratory of Hematology, GIGA-Research, University of Liege, Liege, Belgium
| | - Arjan W Griffioen
- Angiogenesis Laboratory, Department Medical Oncology, VU University Medical Center, Amsterdam, the Netherlands
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16
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Cullinane AR, Yeager C, Dorward H, Carmona-Rivera C, Wu HP, Moss J, O'Brien KJ, Nathan SD, Meyer KC, Rosas IO, Helip-Wooley A, Huizing M, Gahl WA, Gochuico BR. Dysregulation of galectin-3. Implications for Hermansky-Pudlak syndrome pulmonary fibrosis. Am J Respir Cell Mol Biol 2014; 50:605-13. [PMID: 24134621 DOI: 10.1165/rcmb.2013-0025oc] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023] Open
Abstract
The etiology of Hermansky-Pudlak syndrome (HPS) pulmonary fibrosis (HPSPF), a progressive interstitial lung disease with high mortality, is unknown. Galectin-3 is a β-galactoside-binding lectin with profibrotic effects. The objective of this study was to investigate the involvement of galectin-3 in HPSPF. Galectin-3 was measured by ELISA, immunohistochemistry, and immunoblotting in human specimens from subjects with HPS and control subjects. Mechanisms of galectin-3 accumulation were studied by quantitative RT-PCR, Northern blot analysis, membrane biotinylation assays, and rescue of HPS1-deficient cells by transfection. Bronchoalveolar lavage galectin-3 concentrations were significantly higher in HPSPF compared with idiopathic pulmonary fibrosis or that from normal volunteers, and correlated with disease severity. Galectin-3 immunostaining was increased in HPSPF compared with idiopathic pulmonary fibrosis or normal lung tissue. Fibroblasts from subjects with HPS subtypes associated with pulmonary fibrosis had increased galectin-3 protein expression compared with cells from nonfibrotic HPS subtypes. Galectin-3 protein accumulation was associated with reduced Galectin-3 mRNA, normal Mucin 1 levels, and up-regulated microRNA-322 in HPSPF cells. Membrane biotinylation assays showed reduced galectin-3 and normal Mucin 1 expression at the plasma membrane in HPSPF cells compared with control cells, which suggests that galectin-3 is mistrafficked in these cells. Reconstitution of HPS1 cDNA into HPS1-deficient cells normalized galectin-3 protein and mRNA levels, as well as corrected galectin-3 trafficking to the membrane. Intracellular galectin-3 levels are regulated by HPS1 protein. Abnormal accumulation of galectin-3 may contribute to the pathogenesis of HPSPF.
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Affiliation(s)
- Andrew R Cullinane
- 1 Medical Genetics Branch, National Human Genome Research Institute, Bethesda, Maryland
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Candida albicans and Candida parapsilosis Rapidly Up-Regulate Galectin-3 Secretion by Human Gingival Epithelial Cells. Mycopathologia 2014; 177:75-9. [DOI: 10.1007/s11046-013-9725-1] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2013] [Accepted: 12/23/2013] [Indexed: 11/24/2022]
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Berbís MÁ, André S, Cañada FJ, Pipkorn R, Ippel H, Mayo KH, Kübler D, Gabius HJ, Jiménez-Barbero J. Peptides derived from human galectin-3 N-terminal tail interact with its carbohydrate recognition domain in a phosphorylation-dependent manner. Biochem Biophys Res Commun 2013; 443:126-31. [PMID: 24269589 DOI: 10.1016/j.bbrc.2013.11.063] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2013] [Accepted: 11/14/2013] [Indexed: 11/30/2022]
Abstract
Galectin-3 (Gal-3) is a multi-functional effector protein that functions in the cytoplasm and the nucleus, as well as extracellularly following non-classical secretion. Structurally, Gal-3 is unique among galectins with its carbohydrate recognition domain (CRD) attached to a rather long N-terminal tail composed mostly of collagen-like repeats (nine in the human protein) and terminating in a short non-collagenous terminal peptide sequence unique in this lectin family and not yet fully explored. Although several Ser and Tyr sites within the N-terminal tail can be phosphorylated, the physiological significance of this post-translational modification remains unclear. Here, we used a series of synthetic (phospho)peptides derived from the tail to assess phosphorylation-mediated interactions with (15)N-labeled Gal-3 CRD. HSQC-derived chemical shift perturbations revealed selective interactions at the backface of the CRD that were attenuated by phosphorylation of Tyr 107 and Tyr 118, while phosphorylation of Ser 6 and Ser 12 was essential. Controls with sequence scrambling underscored inherent specificity. Our studies shed light on how phosphorylation of the N-terminal tail may impact on Gal-3 function and prompt further studies using phosphorylated full-length protein.
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Affiliation(s)
- M Álvaro Berbís
- Chemical and Physical Biology Department, Centro de Investigaciones Biológicas, CSIC, 28040 Madrid, Spain
| | - Sabine André
- Institute of Physiological Chemistry, Faculty of Veterinary Medicine, Ludwig-Maximilians University, 80539 Munich, Germany
| | - F Javier Cañada
- Chemical and Physical Biology Department, Centro de Investigaciones Biológicas, CSIC, 28040 Madrid, Spain
| | - Rüdiger Pipkorn
- Central Peptide Synthesis Unit, German Cancer Research Center, 69120 Heidelberg, Germany
| | - Hans Ippel
- Department of Biochemistry, CARIM, University of Maastricht, Maastricht, The Netherlands; Department of Biochemistry, Molecular Biology and Biophysics, University of Minnesota, Minneapolis, MN 55455, USA
| | - Kevin H Mayo
- Department of Biochemistry, Molecular Biology and Biophysics, University of Minnesota, Minneapolis, MN 55455, USA
| | - Dieter Kübler
- Biomolecular Interactions, German Cancer Research Center, 69120 Heidelberg, Germany
| | - Hans-Joachim Gabius
- Institute of Physiological Chemistry, Faculty of Veterinary Medicine, Ludwig-Maximilians University, 80539 Munich, Germany
| | - Jesús Jiménez-Barbero
- Chemical and Physical Biology Department, Centro de Investigaciones Biológicas, CSIC, 28040 Madrid, Spain.
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Ge XN, Ha SG, Liu FT, Rao SP, Sriramarao P. Eosinophil-expressed galectin-3 regulates cell trafficking and migration. Front Pharmacol 2013; 4:37. [PMID: 23576987 PMCID: PMC3617360 DOI: 10.3389/fphar.2013.00037] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2013] [Accepted: 03/18/2013] [Indexed: 12/16/2022] Open
Abstract
Galectin-3 (Gal-3), a β galactoside-binding lectin, is implicated in the pathogenesis of allergic airway inflammation and allergen-challenged mice deficient in Gal-3 (Gal-3(-/-)) exhibit decreased airway recruitment of eosinophils (Eos). Gal-3 is expressed and secreted by several cell types and can thus function extracellularly and intracellularly to regulate a variety of cellular responses. We sought to determine the role of Eos-expressed Gal-3 in promoting Eos trafficking and migration in the context of allergic airway inflammation using bone marrow (BM)-derived Eos from wild-type (WT) and Gal-3(-/-) mice. Airway recruitment of Eos in acute (4 weeks) and chronic (8-12 weeks) allergen-challenged WT mice correlated with Gal-3 expression in the lungs. BM-derived Eos were found to express Gal-3 on the cell surface and secrete soluble Gal-3 when exposed to eotaxin-1. Compared to WT Eos, Gal-3(-/-) Eos exhibited significantly reduced rolling on vascular cell adhesion molecule 1 (VCAM-1) and decreased stable adhesion on intercellular adhesion molecule 1 (ICAM-1) under conditions of flow in vitro. Evaluation of cytoskeletal rearrangement demonstrated that relatively fewer adherent Gal-3(-/-) Eos undergo cell spreading and formation of membrane protrusions. In addition, cell surface expression of integrin receptor αM (CD11b) was lower in Gal-3(-/-) Eos, which is likely to account for their altered adhesive interactions with VCAM-1 and ICAM-1. Gal-3(-/-) Eos also exhibited significantly decreased migration toward eotaxin-1 compared to WT Eos irrespective of similar levels of CCR3 expression. Further, eotaxin-induced migration of WT Eos remained unaffected in the presence of lactose, suggesting a role for intracellular Gal-3 in regulating Eos migration. Overall, our findings indicate that Gal-3 expression in the lungs correlates with Eos mobilization during allergic airway inflammation and signaling involving intracellular Gal-3 and/or secreted Gal-3 bound to the cell surface of Eos appears to be essential for Eos trafficking under flow as well as for migration.
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Affiliation(s)
- Xiao Na Ge
- Department of Veterinary and Biomedical Sciences, University of Minnesota St. Paul, MN, USA
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Balan V, Nangia-Makker P, Kho DH, Wang Y, Raz A. Tyrosine-phosphorylated galectin-3 protein is resistant to prostate-specific antigen (PSA) cleavage. J Biol Chem 2012; 287:5192-8. [PMID: 22232548 DOI: 10.1074/jbc.c111.331686] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023] Open
Abstract
Galectin-3 is a chimeric carbohydrate-binding protein, which interacts with cell surface carbohydrate-containing molecules and extracellular matrix glycoproteins and has been implicated in various biological processes such as cell growth, angiogenesis, motility, and metastasis. It is expressed in a wide range of tumor cells and is associated with tumor progression. The functions of galectin-3 are dependent on its localization and post-translational modifications such as cleavage and phosphorylation. Recently, we showed that galectin-3 Tyr-107 is phosphorylated by c-Abl; concomitantly, it was also shown that galectin-3 can be cleaved at this site by prostate-specific antigen (PSA), a chymotrypsin-like serine protease, after Tyr-107, resulting in loss of galectin-3 multivalency while preserving its carbohydrate binding activity. Galectin-3 is largely a monomer in solution but may form a homodimer by self-association through its carbohydrate recognition domain, whereas, in the presence of a ligand, galectin-3 polymerizes up to pentamers utilizing its N-terminal domain. Oligomerization is a unique feature of secreted galectin-3, which allows its function by forming ordered galectin-glycan structures, i.e. lattices, on the cell surface or through direct engagement of specific cell surface glycoconjugates by traditional ligand-receptor binding. We questioned whether Tyr-107 phosphorylation by c-Abl affects galectin-3 cleavage by PSA. The data suggest a role for galectin-3 in prostate cells associated with increased activity of c-Abl kinase and loss of phosphatase and tensin homologue deleted on chromosome 10 (PTEN) activity. In addition, the ratio of phosphorylated/dephosphorylated galectin-3 might be used as a complementary value to that of PSA for prognosis of prostate cancer and a novel therapeutic target for the treatment of prostate cancer.
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Affiliation(s)
- Vitaly Balan
- Karmanos Cancer Institute, Wayne State University, Detroit, Michigan 48201, USA.
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