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      S100A12 in Digestive Diseases and Health: A Scoping Review

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          Abstract

          Calgranulin proteins are an important class of molecules involved in innate immunity. These members of the S100 class of the EF-hand family of calcium-binding proteins have numerous cellular and antimicrobial functions. One protein in particular, S100A12 (also called EN-RAGE or calgranulin C), is highly abundant in neutrophils during acute inflammation and has been implicated in immune regulation. Structure-function analyses reveal that S100A12 has the capacity to bind calcium, zinc, and copper, processes that contribute to nutritional immunity against invading microbial pathogens. S100A12 is a ligand for the receptor for advanced glycation end products (RAGE), toll-like receptor 4 (TLR4), and CD36, which promote cellular and immunological pathways to alter inflammation. We conducted a scoping review of the existing literature to define what is known about the association of S100A12 with digestive disease and health. Results suggest that S100A12 is implicated in gastroenteritis, necrotizing enterocolitis, gastritis, gastric cancer, Crohn's disease, irritable bowel syndrome, inflammatory bowel disease, and digestive tract cancers. Together, these results reveal S100A12 is an important molecule broadly associated with the pathogenesis of digestive diseases.

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          Most cited references77

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          Functions of S100 proteins.

          The S100 protein family consists of 24 members functionally distributed into three main subgroups: those that only exert intracellular regulatory effects, those with intracellular and extracellular functions and those which mainly exert extracellular regulatory effects. S100 proteins are only expressed in vertebrates and show cell-specific expression patterns. In some instances, a particular S100 protein can be induced in pathological circumstances in a cell type that does not express it in normal physiological conditions. Within cells, S100 proteins are involved in aspects of regulation of proliferation, differentiation, apoptosis, Ca2+ homeostasis, energy metabolism, inflammation and migration/invasion through interactions with a variety of target proteins including enzymes, cytoskeletal subunits, receptors, transcription factors and nucleic acids. Some S100 proteins are secreted or released and regulate cell functions in an autocrine and paracrine manner via activation of surface receptors (e.g. the receptor for advanced glycation end-products and toll-like receptor 4), G-protein-coupled receptors, scavenger receptors, or heparan sulfate proteoglycans and N-glycans. Extracellular S100A4 and S100B also interact with epidermal growth factor and basic fibroblast growth factor, respectively, thereby enhancing the activity of the corresponding receptors. Thus, extracellular S100 proteins exert regulatory activities on monocytes/macrophages/microglia, neutrophils, lymphocytes, mast cells, articular chondrocytes, endothelial and vascular smooth muscle cells, neurons, astrocytes, Schwann cells, epithelial cells, myoblasts and cardiomyocytes, thereby participating in innate and adaptive immune responses, cell migration and chemotaxis, tissue development and repair, and leukocyte and tumor cell invasion.
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            Intracellular and extracellular roles of S100 proteins.

            S100, a multigenic family of non-ubiquitous Ca(2+)-modulated proteins of the EF-hand type expressed in vertebrates exclusively, has been implicated in intracellular and extracellular regulatory activities. Members of this protein family have been shown to interact with several effector proteins within cells thereby regulating enzyme activities, the dynamics of cytoskeleton constituents, cell growth and differentiation, and Ca(2+) homeostasis. Structural information indicates that most of S100 proteins exist in the form of antiparallelly packed homodimers (in some cases heterodimers), capable of functionally crossbridging two homologous or heterologous target proteins in a Ca(2+)-dependent (and, in some instances, Ca(2+)-independent) manner. In addition, extracellular roles have been described for several S100 members, although secretion (via an unknown mechanism) has been documented for a few of them. Extracellular S100 proteins have been shown to exert regulatory effects on inflammatory cells, neurons, astrocytes, microglia, and endothelial and epithelial cells, and a cell surface receptor, RAGE, has been identified as a potential S100A12 and S100B receptor transducing the effects of these two proteins on inflammatory cells and neurons. Other cell surface molecules with ability to interact with S100 members have been identified, suggesting that RAGE might not be a universal S100 protein receptor and/or that a single S100 protein might interact with more than one receptor. Collectively, these data indicate that members of the S100 protein family are multifunctional proteins implicated in the regulation of a variety of cellular activities. Copyright 2003 Wiley-Liss, Inc.
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              S100 proteins: structure, functions and pathology.

              S100 proteins regulate intracellular processes such as cell growth and motility, cell cycle regulation, transcription and differentiation. Twenty members have been identified so far, and altogether, S100 proteins represent the largest subgroup in the EF-hand Ca2+ -binding protein family. A unique feature of these proteins is that individual members are localized in specific cellular compartments from which some are able to relocate upon Ca2+ activation, transducing the Ca2+ signal in a temporal and spacial manner by interacting with different targets specific for each S100 protein. Some members are even secreted from cells exerting extracellular, cytokine-like activities partially via the surface receptor RAGE (receptor for advanced glycation endproducts) with paracrine effects e.g. on neurons, promoting their survival during development or after injury. Another important aspect is that 14 bona fide S100 genes are found in a gene cluster on human chromosome 1q21 where a number of chromosomal abnormalities occur. This results in a deregulated expression of some S100 genes associated with neoplasias. Recently, S100 proteins have received increasing attention due to their close association with several human diseases including cardiomyopathy, neurodegenerative disorders and cancer. They have also been proven to be valuable in the diagnostic of these diseases, as predictive markers of improving clinical management, outcome and survival of patients and are considered having a potential as drug targets to improve therapies.
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                Author and article information

                Contributors
                Journal
                Gastroenterol Res Pract
                Gastroenterol Res Pract
                GRP
                Gastroenterology Research and Practice
                Hindawi
                1687-6121
                1687-630X
                2020
                26 February 2020
                : 2020
                : 2868373
                Affiliations
                1Internal Medicine Program, St. Joseph Mercy Hospital, Ann Arbor, Michigan, USA
                2Department of Pathology, Microbiology, And Immunology, Vanderbilt University School of Medicine, Nashville, Tennessee, USA
                3Department of Chemistry, Vanderbilt University, Nashville, Tennessee, USA
                4Department of Biomedical Sciences, Grand Valley State University, Allendale, Michigan, USA
                5Division of Infectious Diseases, Department of Medicine, Vanderbilt University Medical Center, Nashville, Tennessee, USA
                6Department of Microbiology, University of Tennessee, Knoxville, Tennessee, USA
                7Department of Life and Physical Sciences, Fisk University, Nashville, Tennessee, USA
                8Departments of Biochemistry and Chemistry, Vanderbilt University, Nashville, Tennessee, USA
                9Department of Structural Biology, Vanderbilt University, Nashville, Tennessee, USA
                10Tennessee Valley Healthcare Systems, Department of Veterans Affairs, Nashville, Tennessee, USA
                Author notes

                Academic Editor: Tatsuya Toyokawa

                Author information
                https://orcid.org/0000-0002-2192-4224
                Article
                10.1155/2020/2868373
                7061133
                32184815
                0b733a0a-a5c2-4d1c-a340-d7c44032f281
                Copyright © 2020 Alexandre Carvalho et al.

                This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

                History
                : 25 July 2019
                : 5 January 2020
                : 22 January 2020
                Funding
                Funded by: National Center for Advancing Translational Sciences
                Award ID: 2 UL1 TR000445-06
                Funded by: National Center for Research Resources
                Award ID: UL1 RR024975-01
                Funded by: Vanderbilt University Medical Center
                Award ID: P30DK058404
                Funded by: National Science Foundation
                Award ID: NSF CHE-1847804
                Award ID: NSF 1400969
                Award ID: NSF 1547757
                Funded by: Office of Medical Research, Department of Veterans Affairs
                Award ID: IK2BX001701
                Funded by: National Institutes of Health
                Award ID: GM05551
                Award ID: 2T32HL007411-36
                Award ID: R01 HD090061
                Categories
                Review Article

                Gastroenterology & Hepatology
                Gastroenterology & Hepatology

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