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He JY, Li J, Zhang YY, He HB, He YM, Xu DX, Wang X, Wu HY, Zhang JH, Jahid H, Sadia A, Yu HF, Wang JZ, Zou K. Tormentic acid, a triterpenoid isolated from the fruits of Chaenomeles speciose, protected indomethacin-induced gastric mucosal lesion via modulating miR-139 and the CXCR4/CXCL12/PLC/PKC/Rho a/MLC pathway. PHARMACEUTICAL BIOLOGY 2023; 61:1343-1363. [PMID: 37623313 PMCID: PMC10461523 DOI: 10.1080/13880209.2023.2249526] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/18/2022] [Revised: 07/31/2023] [Accepted: 08/14/2023] [Indexed: 08/26/2023]
Abstract
CONTEXT Tormentic acid (TA), an effective triterpenoid isolated from Chaenomeles speciosa (Sweet) Nakai (Rosaceae) fruits, exerts an effective treatment for gastric damage. OBJECTIVE To investigate the gastroprotective effect of TA on indomethacin (IND) damaged GES-1 cells and rats, and explore potential mechanisms. MATERIALS AND METHODS TA concentrations of 1.563-25 µM were used. Cell proliferation, apoptosis and migration were performed using MTT, colony formation, wound healing, migration, Hoechst staining assays. SD rats were divided into control, IND, TA (1, 2 and 4 mg/kg) + IND groups, once a day for 21 continuous days. Twenty-four hours after the last administration, all groups except the control group were given IND (100 mg/kg) by gavage. Gastric juice parameters, gastric ulcer, gastric blood flow (GBF), blood biochemical parameters and cytokine analysis and gastric mucosal histopathology were detected for 2 h and 6 h after IND oral administration. The mRNA and protein expression of miR-139 and the CXCR4/CXCL12/PLC/PKC/Rho A/MLC pathway were analyzed in the IND-damaged GES-1 cells and gastric tissue of rats. RESULTS TA might ameliorate the gastric mucosal injury by accelerating the IND-damaged GES-1 cell proliferation and migration, ameliorating GBF, ulcer area and pathologic changes, the redox system and cytokine levels, the gastric juice parameters, elevating the gastric pH in IND damaged rats; suppressed miR-139 mRNA expression, elevated CXCR4 and CXCL12 mRNA and protein expression, p-PLC, p-PKC, Rho A, MLCK and p-MLC protein expression. DISCUSSION AND CONCLUSIONS TA may have potential use as a clinical drug candidate for gastric mucosal lesion treatment.
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Affiliation(s)
- Jun-Yu He
- Department of Clinical Medicine, College of Basic Medical Science, China Three Gorges University, Yichang, P.R. China
| | - Jie Li
- Yichang Key Laboratory of Development and Utilization of Health Products with Drug Food Homology & Hubei Key Laboratory of Natural Products Research and Development, China Three Gorges University, Yichang, P.R. China
| | - Yuan-Yuan Zhang
- Yichang Key Laboratory of Development and Utilization of Health Products with Drug Food Homology & Hubei Key Laboratory of Natural Products Research and Development, China Three Gorges University, Yichang, P.R. China
| | - Hai-Bo He
- Yichang Key Laboratory of Development and Utilization of Health Products with Drug Food Homology & Hubei Key Laboratory of Natural Products Research and Development, China Three Gorges University, Yichang, P.R. China
- Hubei Key Laboratory of Wudang Local Chinese Medicine Research, Shiyan, P.R. China
| | - Yu-Min He
- Department of Clinical Medicine, College of Basic Medical Science, China Three Gorges University, Yichang, P.R. China
| | - Dao-Xiang Xu
- Department of Gastroenterology, Seventh People’s Hospital of Wenzhou, Wenzhou, P.R. China
| | - Xiao Wang
- Yichang Key Laboratory of Development and Utilization of Health Products with Drug Food Homology & Hubei Key Laboratory of Natural Products Research and Development, China Three Gorges University, Yichang, P.R. China
| | - Hao-Yang Wu
- Department of Clinical Medicine, College of Basic Medical Science, China Three Gorges University, Yichang, P.R. China
| | - Ji-Hong Zhang
- Department of Gastroenterology, Chinese Medicine Clinical Medical College & Hubei Clinical Research Center for Functional Digestive Diseases of Traditional Chinese Medicine, China Three Gorges University, Yichang, P.R. China
| | - Hasan Jahid
- Yichang Key Laboratory of Development and Utilization of Health Products with Drug Food Homology & Hubei Key Laboratory of Natural Products Research and Development, China Three Gorges University, Yichang, P.R. China
| | - Akter Sadia
- Yichang Key Laboratory of Development and Utilization of Health Products with Drug Food Homology & Hubei Key Laboratory of Natural Products Research and Development, China Three Gorges University, Yichang, P.R. China
| | - Hui-Fan Yu
- Hubei Key Laboratory of Wudang Local Chinese Medicine Research, Shiyan, P.R. China
| | - Jun-Zhi Wang
- Yichang Key Laboratory of Development and Utilization of Health Products with Drug Food Homology & Hubei Key Laboratory of Natural Products Research and Development, China Three Gorges University, Yichang, P.R. China
| | - Kun Zou
- Yichang Key Laboratory of Development and Utilization of Health Products with Drug Food Homology & Hubei Key Laboratory of Natural Products Research and Development, China Three Gorges University, Yichang, P.R. China
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Stuhr S, Nör F, Gayar K, Couso-Queiruga E, Chambrone L, Gamborena I, Kumar P, Avila-Ortiz G, Ganesan SM. Histological assessment and gene expression analysis of intra-oral soft tissue graft donor sites. J Clin Periodontol 2023; 50:1360-1370. [PMID: 37424138 DOI: 10.1111/jcpe.13843] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2023] [Revised: 05/18/2023] [Accepted: 06/11/2023] [Indexed: 07/11/2023]
Abstract
AIM To determine the structural and gene expression features of different intra-oral soft tissue donor sites (i.e., anterior palate, posterior palate, maxillary tuberosity and retromolar pad). MATERIALS AND METHODS Standardized mucosal tissue punch biopsies were collected from at least one donor site per subject. Histological processing was performed to determine tissue morphometry and quantify collagen composition. Site-specific gene distribution was mapped using targeted gene expression analysis and validated using real time polymerase chain reaction (qPCR). RESULTS A total of 50 samples from 37 subjects were harvested. Epithelial thickness did not differ between sites. However, lamina propria was thicker in the maxillary tuberosity (2.55 ± 0.92 mm) and retromolar pad (1.98 ± 0.71 mm) than in the lateral palate. Type I collagen was the predominant structural protein in the lamina propria (75.06%-80.21%). Genes involving collagen maturation and extracellular matrix regulation were highly expressed in the maxillary tuberosity and retromolar pad, while lipogenesis-associated genes were markedly expressed in the lateral palate. The retromolar pad showed the most distinct gene expression profile, and the anterior and posterior palate displayed similar transcription profiles. CONCLUSIONS Tissue samples harvested from the anterior and posterior palate differed morphologically from those from the maxillary tuberosity and retromolar pad. Each intra-oral site showed a unique gene expression profile, which might impact their biological behaviour and outcomes of soft tissue augmentation procedures.
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Affiliation(s)
- Sandra Stuhr
- Department of Periodontics, University of Iowa College of Dentistry, Iowa City, Iowa, USA
| | - Felipe Nör
- Department of Periodontics and Oral Medicine, University of Michigan School of Dentistry, Ann Arbor, Michigan, USA
| | - Kareem Gayar
- Department of Periodontics, University of Iowa College of Dentistry, Iowa City, Iowa, USA
| | - Emilio Couso-Queiruga
- Department of Periodontics, University of Iowa College of Dentistry, Iowa City, Iowa, USA
| | - Leandro Chambrone
- Evidence-Based Hub, Centro de Investigação Interdisciplinar Egas Moniz (CiiEM), Egas Moniz, CRL, Monte de Caparica, Portugal
- Unit of Basic Oral Investigations (UIBO), School of Dentistry, Universidad El Bosque, Bogotá, Colombia
- Department of Periodontics, School of Dental Medicine, The University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - Iñaki Gamborena
- Private Practice, San Sebastian, Spain
- Department of Preventive and Restorative Sciences, University of Pennsylvania School of Dental Medicine, Philadelphia, Pennsylvania, USA
- Department of Restorative Dentistry, University of Washington School of Dentistry, Seattle, Washington, USA
| | - Purnima Kumar
- Department of Periodontics and Oral Medicine, University of Michigan School of Dentistry, Ann Arbor, Michigan, USA
| | - Gustavo Avila-Ortiz
- Department of Periodontics, University of Iowa College of Dentistry, Iowa City, Iowa, USA
| | - Sukirth M Ganesan
- Department of Periodontics, University of Iowa College of Dentistry, Iowa City, Iowa, USA
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Di Martino L, Osme A, Ghannoum M, Cominelli F. A Novel Probiotic Combination Ameliorates Crohn's Disease-Like Ileitis by Increasing Short-Chain Fatty Acid Production and Modulating Essential Adaptive Immune Pathways. Inflamm Bowel Dis 2023; 29:1105-1117. [PMID: 36715169 PMCID: PMC10320237 DOI: 10.1093/ibd/izac284] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/14/2022] [Indexed: 01/31/2023]
Abstract
BACKGROUND Crohn's disease (CD) represents a significant public health challenge. We identified a combination of beneficial probiotic strains (Saccharomyces boulardii, Lactobacillus rhamnosus, Lactobacillus acidophilus, and Bifidobacterium breve) and amylase that may antagonize elevated bacterial pathogens in the inflamed gut. Our aim was to characterize the effect(s) of this novel probiotic supplement in SAMP1/YitFc (SAMP) mice with CD-like ileitis. METHODS Three groups of 7-week-old SAMP mice were used in this study. The first experimental group was administered 1 dose of the probiotic supplement (probiotic strains + amylase) diluted in sterile phosphate-buffered saline (PBS) (0.25 mg in 100 µL of PBS) every day for 56 days through the gavage technique, the second group had a probiotic supplement (probiotic strains without amylase), and the third group was a control group in which animals were administered sterile PBS. At the end of the treatment, mice were sacrificed and ilea were collected for histological scoring of ileitis and NanoString analysis. Stool samples were evaluated by 16S ribosomal RNA and gas chromatography-mass spectrometry analyses. RESULTS Histology scores showed that mice treated with probiotics + amylase had a significant decrease of ileitis severity compared with the other 2 groups. 16S ribosomal RNA and gas chromatography-mass spectrometry analysis showed that abundance of species belonging to genus Lachnoclostridium and Mucispirillum schaedleri were significantly increased compared with the other 2 groups, and this increase was associated with augmented production of short-chain fatty acids. NanoString data showed that 21 genes involved in B memory cell development and T cell infiltration were significantly upregulated in probiotic-treated mice and that 3 genes were significantly downregulated. CONCLUSIONS Our data provide experimental proof for a beneficial effect of the designed probiotic formulation on the severity of CD-like ileitis in the SAMP mouse model, involving both alteration of intestinal genetic pathways and microbial rearrangements. Thus, we propose that this novel probiotic mixture should be further tested as an adjuvant therapy in the treatment of biofilm-associated disorders such as CD, in which it has been proven that polymicrobial imbalance plays a critical role in dysbiosis and gut inflammation.
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Affiliation(s)
- Luca Di Martino
- Case Digestive Health Research Institute, Case Western University School of Medicine, Cleveland, OH, USA
- Department of Medicine, Case Western University School of Medicine, Cleveland, OH, USA
| | - Abdullah Osme
- Department of Pathology, Case Western University School of Medicine, Cleveland, OH, USA
| | - Mahmoud Ghannoum
- Center for Medical Mycology and Integrated Microbiome Core, Department of Dermatology, Case Western Reserve University, and University Hospitals Cleveland Medical Center, Cleveland, OH, USA
| | - Fabio Cominelli
- Case Digestive Health Research Institute, Case Western University School of Medicine, Cleveland, OH, USA
- Department of Medicine, Case Western University School of Medicine, Cleveland, OH, USA
- Department of Pathology, Case Western University School of Medicine, Cleveland, OH, USA
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Okamoto Y, Shikano S. Emerging roles of a chemoattractant receptor GPR15 and ligands in pathophysiology. Front Immunol 2023; 14:1179456. [PMID: 37457732 PMCID: PMC10348422 DOI: 10.3389/fimmu.2023.1179456] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2023] [Accepted: 06/19/2023] [Indexed: 07/18/2023] Open
Abstract
Chemokine receptors play a central role in the maintenance of immune homeostasis and development of inflammation by directing leukocyte migration to tissues. GPR15 is a G protein-coupled receptor (GPCR) that was initially known as a co-receptor for human immunodeficiency virus (HIV) and simian immunodeficiency virus (SIV), with structural similarity to other members of the chemoattractant receptor family. Since the discovery of its novel function as a colon-homing receptor of T cells in mice a decade ago, GPR15 has been rapidly gaining attention for its involvement in a variety of inflammatory and immune disorders. The recent identification of its natural ligand C10orf99, a chemokine-like polypeptide strongly expressed in gastrointestinal tissues, has established that GPR15-C10orf99 is a novel signaling axis that controls intestinal homeostasis and inflammation through the migration of immune cells. In addition, it has been demonstrated that C10orf99-independent functions of GPR15 and GPR15-independent activities of C10orf99 also play significant roles in the pathophysiology. Therefore, GPR15 and its ligands are potential therapeutic targets. To provide a basis for the future development of GPR15- or GPR15 ligand-targeted therapeutics, we have summarized the latest advances in the role of GPR15 and its ligands in human diseases as well as the molecular mechanisms that regulate GPR15 expression and functions.
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Affiliation(s)
| | - Sojin Shikano
- Department of Biochemistry and Molecular Genetics, University of Illinois at Chicago, Chicago, IL, United States
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Andrade ADO, Mesquita RA, Gordón-Núñez MA, Alves PM, Nonaka CFW. Immunoexpression of CXCL12 and CXCR4 in Radicular Cysts, Dentigerous Cysts, and Odontogenic Keratocysts. Appl Immunohistochem Mol Morphol 2023; 31:113-120. [PMID: 36449693 DOI: 10.1097/pai.0000000000001093] [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: 11/08/2021] [Accepted: 11/08/2022] [Indexed: 12/05/2022]
Abstract
The aim of this study was to evaluate the immunoexpression of chemokine CXCL12 and its receptor CXCR4 in radicular cysts (RCs), dentigerous cysts (DCs), and odontogenic keratocysts (OKCs), and to correlate the findings with morphologic parameters of RCs (inflammatory infiltrate and cystic epithelium). Twenty RCs, 20 DCs, and 20 OKCs were submitted to immunohistochemistry. The percentages of cytoplasmic (CXCL12 and CXCR4) and nuclear (CXCR4) staining in epithelial and fibrous capsule cells were determined. RCs and DCs exhibited higher epithelial expression of CXCL12 than OKCs ( P <0.05). The expression of CXCL12 in the fibrous capsule was higher in DCs than in RCs and OKCs ( P <0.05). Higher cytoplasmic expression of CXCR4 was observed in the epithelial lining and fibrous capsule of RCs and DCs compared with OKCs ( P <0.05). In the fibrous capsule, DCs exhibited higher nuclear expression of CXCR4 than OKCs ( P <0.05). No significant differences in the immunoexpression of CXCL12 or CXCR4 were observed according to the morphologic parameters of RCs ( P >0.05). Strong positive correlations were found between cytoplasmic and nuclear expression of CXCR4 in the epithelial lining of RCs and DCs and in the fibrous capsule of all groups ( P <0.05). The results suggest the participation of CXCL12 and CXCR4 in the pathogenesis of RCs, DCs, and OKCs. These proteins may be particularly relevant for the development of odontogenic cysts with less aggressive biological behavior, irrespective of their nature (inflammatory or developmental). In RCs, the expression of CXCL12 and CXCR4 may not be related to the intensity of the inflammatory infiltrate or the status of cystic epithelium.
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Affiliation(s)
| | - Ricardo Alves Mesquita
- Department of Oral Pathology and Surgery, School of Dentistry, Federal University of Minas Gerais, Belo Horizonte, Brazil
| | | | - Pollianna Muniz Alves
- Department of Dentistry, School of Dentistry, State University of Paraíba, Campina Grande, Brazil
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Fytianos K, Schliep R, Mykoniati S, Khan P, Hostettler KE, Tamm M, Gazdhar A, Knudsen L, Geiser T. Anti-Fibrotic Effect of SDF-1β Overexpression in Bleomycin-Injured Rat Lung. Pharmaceutics 2022; 14:pharmaceutics14091803. [PMID: 36145551 PMCID: PMC9502331 DOI: 10.3390/pharmaceutics14091803] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2022] [Revised: 08/18/2022] [Accepted: 08/20/2022] [Indexed: 11/26/2022] Open
Abstract
Rational: Idiopathic pulmonary fibrosis (IPF) is a progressive interstitial lung disease and is associated with high mortality due to a lack of effective treatment. Excessive deposition of the extracellular matrix by activated myofibroblasts in the alveolar space leads to scar formation that hinders gas exchange. Therefore, selectively removing activated myofibroblasts with the aim to repair and remodel fibrotic lungs is a promising approach. Stromal-derived growth factor (SDF-1) is known to stimulate cellular signals which attract stem cells to the site of injury for tissue repair and remodeling. Here, we investigate the effect of overexpression of SDF-1β on lung structure using the bleomycin-injured rat lung model. Methods: Intratracheal administration of bleomycin was performed in adult male rats (F344). Seven days later, in vivo electroporation-mediated gene transfer of either SDF-1β or the empty vector was performed. Animals were sacrificed seven days after gene transfer and histology, design-based stereology, flow cytometry, and collagen measurement were performed on the tissue collected. For in vitro experiments, lung fibroblasts obtained from IPF patients were used. Results: Seven days after SDF-1β gene transfer to bleomycin-injured rat lungs, reduced total collagen, reduced collagen fibrils, improved histology and induced apoptosis of myofibroblasts were observed. Furthermore, it was revealed that TNF-α mediates SDF-1β-induced apoptosis of myofibroblasts; moreover, SDF-1β overexpression increased alveolar epithelial cell numbers and proliferation in vivo and also induced their migration in vitro. Conclusions: Our study demonstrates a new antifibrotic mechanism of SDF-1β overexpression and suggests SDF-1β as a potential new approach for the treatment of lung fibrosis.
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Affiliation(s)
- Kleanthis Fytianos
- Department of Pulmonary Medicine, University Hospital Bern, 3010 Bern, Switzerland
- Department of Biomedical research, University of Bern, 3010 Bern, Switzerland
| | - Ronja Schliep
- Institute of Functional and Applied Anatomy, Hannover Medical School, 30625 Hanover, Germany
| | - Sofia Mykoniati
- Department of Internal Medicine, Cantonal Hospital of Jura, 2800 Delemont, Switzerland
| | - Petra Khan
- Department of Biomedical Research and Clinics of Respiratory Medicine, University Hospital Basel, University of Basel, 4031 Basel, Switzerland
| | - Katrin E. Hostettler
- Department of Biomedical Research and Clinics of Respiratory Medicine, University Hospital Basel, University of Basel, 4031 Basel, Switzerland
| | - Michael Tamm
- Department of Biomedical Research and Clinics of Respiratory Medicine, University Hospital Basel, University of Basel, 4031 Basel, Switzerland
| | - Amiq Gazdhar
- Department of Pulmonary Medicine, University Hospital Bern, 3010 Bern, Switzerland
- Department of Biomedical research, University of Bern, 3010 Bern, Switzerland
- Correspondence: (A.G.); (T.G.)
| | - Lars Knudsen
- Institute of Functional and Applied Anatomy, Hannover Medical School, 30625 Hanover, Germany
| | - Thomas Geiser
- Department of Pulmonary Medicine, University Hospital Bern, 3010 Bern, Switzerland
- Department of Biomedical research, University of Bern, 3010 Bern, Switzerland
- Correspondence: (A.G.); (T.G.)
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Goïta AA, Guenot D. Colorectal Cancer: The Contribution of CXCL12 and Its Receptors CXCR4 and CXCR7. Cancers (Basel) 2022; 14:1810. [PMID: 35406582 PMCID: PMC8997717 DOI: 10.3390/cancers14071810] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2022] [Revised: 03/22/2022] [Accepted: 03/29/2022] [Indexed: 02/06/2023] Open
Abstract
Colorectal cancer is one of the most common cancers, and diagnosis at late metastatic stages is the main cause of death related to this cancer. This progression to metastasis is complex and involves different molecules such as the chemokine CXCL12 and its two receptors CXCR4 and CXCR7. The high expression of receptors in CRC is often associated with a poor prognosis and aggressiveness of the tumor. The interaction of CXCL12 and its receptors activates signaling pathways that induce chemotaxis, proliferation, migration, and cell invasion. To this end, receptor inhibitors were developed, and their use in preclinical and clinical studies is ongoing. This review provides an overview of studies involving CXCR4 and CXCR7 in CRC with an update on their targeting in anti-cancer therapies.
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Affiliation(s)
| | - Dominique Guenot
- INSERM U1113/Unistra, IRFAC—Interface de Recherche Fondamentale et Appliquée en Cancérologie, 67200 Strasbourg, France;
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Yeung V, Zhang TC, Yuan L, Parekh M, Cortinas JA, Delavogia E, Hutcheon AEK, Guo X, Ciolino JB. Extracellular Vesicles Secreted by Corneal Myofibroblasts Promote Corneal Epithelial Cell Migration. Int J Mol Sci 2022; 23:ijms23063136. [PMID: 35328555 PMCID: PMC8951135 DOI: 10.3390/ijms23063136] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2022] [Revised: 03/10/2022] [Accepted: 03/11/2022] [Indexed: 12/12/2022] Open
Abstract
Corneal epithelial wound healing is a multifaceted process that encompasses cell proliferation, migration, and communication from the corneal stroma. Upon corneal injury, bidirectional crosstalk between the epithelium and stroma via extracellular vesicles (EVs) has been reported. However, the mechanisms by which the EVs from human corneal keratocytes (HCKs), fibroblasts (HCFs), and/or myofibroblasts (HCMs) exert their effects on the corneal epithelium remain unclear. In this study, HCK-, HCF-, and HCM-EVs were isolated and characterized, and human corneal epithelial (HCE) cell migration was assessed in a scratch assay following PKH26-labeled HCK-, HCF-, or HCM-EV treatment. HCE cells proliferative and apoptotic activity following EV treatment was assessed. HCF-/HCM-EVs were enriched for CD63, CD81, ITGAV, and THBS1 compared to HCK-EV. All EVs were negative for GM130 and showed minimal differences in biophysical properties. At the proteomic level, we showed HCM-EV with a log >two-fold change in CXCL6, CXCL12, MMP1, and MMP2 expression compared to HCK-/HCF-EVs; these proteins are associated with cellular movement pathways. Upon HCM-EV treatment, HCE cell migration, velocity, and proliferation were significantly increased compared to HCK-/HCF-EVs. This study concludes that the HCM-EV protein cargo influences HCE cell migration and proliferation, and understanding these elements may provide a novel therapeutic avenue for corneal wound healing.
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Affiliation(s)
- Vincent Yeung
- Department of Ophthalmology, Schepens Eye Research Institute of Mass Eye and Ear, Harvard Medical School, Boston, MA 02114, USA; (L.Y.); (M.P.); (A.E.K.H.); (X.G.); (J.B.C.)
- Correspondence:
| | | | - Ling Yuan
- Department of Ophthalmology, Schepens Eye Research Institute of Mass Eye and Ear, Harvard Medical School, Boston, MA 02114, USA; (L.Y.); (M.P.); (A.E.K.H.); (X.G.); (J.B.C.)
| | - Mohit Parekh
- Department of Ophthalmology, Schepens Eye Research Institute of Mass Eye and Ear, Harvard Medical School, Boston, MA 02114, USA; (L.Y.); (M.P.); (A.E.K.H.); (X.G.); (J.B.C.)
| | - John A. Cortinas
- Division of Newborn Medicine & Department of Pediatrics, Boston Children’s Hospital, Harvard Medical School, Boston, MA 02115, USA; (J.A.C.); (E.D.)
| | - Eleni Delavogia
- Division of Newborn Medicine & Department of Pediatrics, Boston Children’s Hospital, Harvard Medical School, Boston, MA 02115, USA; (J.A.C.); (E.D.)
| | - Audrey E. K. Hutcheon
- Department of Ophthalmology, Schepens Eye Research Institute of Mass Eye and Ear, Harvard Medical School, Boston, MA 02114, USA; (L.Y.); (M.P.); (A.E.K.H.); (X.G.); (J.B.C.)
| | - Xiaoqing Guo
- Department of Ophthalmology, Schepens Eye Research Institute of Mass Eye and Ear, Harvard Medical School, Boston, MA 02114, USA; (L.Y.); (M.P.); (A.E.K.H.); (X.G.); (J.B.C.)
| | - Joseph B. Ciolino
- Department of Ophthalmology, Schepens Eye Research Institute of Mass Eye and Ear, Harvard Medical School, Boston, MA 02114, USA; (L.Y.); (M.P.); (A.E.K.H.); (X.G.); (J.B.C.)
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Camba-Gómez M, Arosa L, Gualillo O, Conde-Aranda J. Chemokines and chemokine receptors in inflammatory bowel disease: Recent findings and future perspectives. Drug Discov Today 2021; 27:1167-1175. [PMID: 34896626 DOI: 10.1016/j.drudis.2021.12.004] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2021] [Revised: 11/11/2021] [Accepted: 12/06/2021] [Indexed: 11/03/2022]
Abstract
Despite the benefits of current therapeutic options for treating inflammatory bowel disease (IBD), there are still patients who are refractory to these therapies. Moreover, the relapses caused by incomplete intestinal mucosa healing are frequent. Therefore, there is a need for novel pharmacological targets that can improve the existing IBD therapeutic armamentarium. Chemokine and chemokine receptors have emerged as appealing options to this end. As well as controlling leukocyte trafficking to inflamed tissues, these proteins regulate many other processes related to the development of intestinal inflammation. In this review, we summarise the most recent preclinical studies, along with the putative application of chemokine-based therapies in patients with IBD.
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Affiliation(s)
- Miguel Camba-Gómez
- Molecular and Cellular Gastroenterology, Health Research Institute of Santiago de Compostela (IDIS), Santiago de Compostela, Spain
| | - Laura Arosa
- Molecular and Cellular Gastroenterology, Health Research Institute of Santiago de Compostela (IDIS), Santiago de Compostela, Spain
| | - Oreste Gualillo
- SERGAS (Servizo Galego de Saude) and IDIS (Instituto de Investigación Sanitaria de Santiago), The NEIRID Lab (Neuroendocrine Interactions in Rheumatology and Inflammatory Diseases), Research Laboratory 9, Santiago University Clinical Hospital, Santiago de Compostela, Spain
| | - Javier Conde-Aranda
- Molecular and Cellular Gastroenterology, Health Research Institute of Santiago de Compostela (IDIS), Santiago de Compostela, Spain.
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Nguyen J, Lin YY, Gerecht S. The next generation of endothelial differentiation: Tissue-specific ECs. Cell Stem Cell 2021; 28:1188-1204. [PMID: 34081899 DOI: 10.1016/j.stem.2021.05.002] [Citation(s) in RCA: 32] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Endothelial cells (ECs) sense and respond to fluid flow and regulate immune cell trafficking in all organs. Despite sharing the same mesodermal origin, ECs exhibit heterogeneous tissue-specific characteristics. Human pluripotent stem cells (hPSCs) can potentially be harnessed to capture this heterogeneity and further elucidate endothelium behavior to satisfy the need for increased accuracy and breadth of disease models and therapeutics. Here, we review current strategies for hPSC differentiation to blood vascular ECs and their maturation into continuous, fenestrated, and sinusoidal tissues. We then discuss the contribution of hPSC-derived ECs to recent advances in organoid development and organ-on-chip approaches.
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Affiliation(s)
- Jane Nguyen
- Department of Chemical and Biomolecular Engineering, The Institute for NanoBioTechnology, Physical Sciences-Oncology Center, Johns Hopkins University, Baltimore, MD 21218, USA
| | - Ying-Yu Lin
- Department of Chemical and Biomolecular Engineering, The Institute for NanoBioTechnology, Physical Sciences-Oncology Center, Johns Hopkins University, Baltimore, MD 21218, USA
| | - Sharon Gerecht
- Department of Chemical and Biomolecular Engineering, The Institute for NanoBioTechnology, Physical Sciences-Oncology Center, Johns Hopkins University, Baltimore, MD 21218, USA; Department of Materials Science and Engineering, Johns Hopkins University, Baltimore, MD 21218, USA; Department of Biomedical Engineering, Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA; Department of Oncology, Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA.
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11
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GPR182 is an endothelium-specific atypical chemokine receptor that maintains hematopoietic stem cell homeostasis. Proc Natl Acad Sci U S A 2021; 118:2021596118. [PMID: 33875597 PMCID: PMC8092405 DOI: 10.1073/pnas.2021596118] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
G protein–coupled receptors (GPCRs) are important regulators of cellular and biological functions and are primary targets of therapeutic drugs. About 100 mammalian GPCRs are still considered orphan receptors because they lack a known endogenous ligand. We report the deorphanization of GPR182, which is expressed in endothelial cells of the microvasculature. We show that GPR182 is an atypical chemokine receptor, which binds CXCL10, 12, and 13. However, binding does not induce downstream signaling. Consistent with a scavenging function of GPR182, mice lacking GPR182 have increased plasma levels of chemokines. In line with the crucial role of CXCL12 in hematopoietic stem cell homeostasis, we found that loss of GPR182 results in increased egress of hematopoietic stem cells from the bone marrow. G protein–coupled receptor 182 (GPR182) has been shown to be expressed in endothelial cells; however, its ligand and physiological role has remained elusive. We found GPR182 to be expressed in microvascular and lymphatic endothelial cells of most organs and to bind with nanomolar affinity the chemokines CXCL10, CXCL12, and CXCL13. In contrast to conventional chemokine receptors, binding of chemokines to GPR182 did not induce typical downstream signaling processes, including Gq- and Gi-mediated signaling or β-arrestin recruitment. GPR182 showed relatively high constitutive activity in regard to β-arrestin recruitment and rapidly internalized in a ligand-independent manner. In constitutive GPR182-deficient mice, as well as after induced endothelium-specific loss of GPR182, we found significant increases in the plasma levels of CXCL10, CXCL12, and CXCL13. Global and induced endothelium-specific GPR182-deficient mice showed a significant decrease in hematopoietic stem cells in the bone marrow as well as increased colony-forming units of hematopoietic progenitors in the blood and the spleen. Our data show that GPR182 is a new atypical chemokine receptor for CXCL10, CXCL12, and CXCL13, which is involved in the regulation of hematopoietic stem cell homeostasis.
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12
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Daniel SK, Seo YD, Pillarisetty VG. The CXCL12-CXCR4/CXCR7 axis as a mechanism of immune resistance in gastrointestinal malignancies. Semin Cancer Biol 2019; 65:176-188. [PMID: 31874281 DOI: 10.1016/j.semcancer.2019.12.007] [Citation(s) in RCA: 120] [Impact Index Per Article: 24.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2019] [Revised: 12/03/2019] [Accepted: 12/11/2019] [Indexed: 02/07/2023]
Abstract
Single agent checkpoint inhibitor therapy has not been effective for most gastrointestinal solid tumors, but combination therapy with drugs targeting additional immunosuppressive pathways is being attempted. One such pathway, the CXCL12-CXCR4/CXCR7 chemokine axis, has attracted attention due to its effects on tumor cell survival and metastasis as well as immune cell migration. CXCL12 is a small protein that functions in normal hematopoietic stem cell homing in addition to repair of damaged tissue. Binding of CXCL12 to CXCR4 leads to activation of G protein signaling kinases such as P13K/mTOR and MEK/ERK while binding to CXCR7 leads to β-arrestin mediated signaling. While some gastric and colorectal carcinoma cells have been shown to make CXCL12, the primary source in pancreatic cancer and peritoneal metastases is cancer-associated fibroblasts. Binding of CXCL12 to CXCR4 and CXCR7 on tumor cells leads to anti-apoptotic signaling through Bcl-2 and survivin upregulation, as well as promotion of the epithelial-to-mesechymal transition through the Rho-ROCK pathway and alterations in cell adhesion molecules. High levels of CXCL12 seen in the bone marrow, liver, and spleen could partially explain why these are popular sites of metastases for many tumors. CXCL12 is a chemoattractant for lymphocytes at lower levels, but becomes chemorepellant at higher levels; it is unclear exactly what gradient exists in the tumor microenvironment and how this influences tumor-infiltrating lymphocytes. AMD3100 (Plerixafor or Mozobil) is a small molecule CXCR4 antagonist and is the most frequently used drug targeting the CXCL12-CXCR4/CXCR7 axis in clinical trials for gastrointestinal solid tumors currently. Other small molecules and monoclonal antibodies against CXCR4 are being trialed. Further understanding of the CXCL12- CXCR4/CXCR7 chemokine axis in the tumor microenvironment will allow more effective targeting of this pathway in combination immunotherapy.
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Affiliation(s)
- Sara K Daniel
- University of Washington, Dept. of Surgery, Seattle, WA, USA
| | - Y David Seo
- University of Washington, Dept. of Surgery, Seattle, WA, USA
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13
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Gaines T, Garcia F, Virani S, Liang Z, Yoon Y, Oum YH, Shim H, Mooring SR. Synthesis and evaluation of 2,5-furan, 2,5-thiophene and 3,4-thiophene-based derivatives as CXCR4 inhibitors. Eur J Med Chem 2019; 181:111562. [PMID: 31377592 DOI: 10.1016/j.ejmech.2019.111562] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2019] [Revised: 07/22/2019] [Accepted: 07/23/2019] [Indexed: 12/22/2022]
Abstract
The interaction between G-Protein coupled receptor CXCR4 and its natural ligand CXCL12 has been linked to inflammation experienced by patients with Irritable Bowel Disease (IBD). Blocking this interaction could potentially reduce inflammatory symptoms in IBD patients. In this work, several thiophene-based and furan-based compounds modeled after AMD3100 and WZ811-two known antagonists that interrupt the CXCR4-CXCL12 interaction-were synthesized and analyzed. Fifteen hit compounds were identified; these compounds exhibited effective concentrations (EC) lower than 1000 nM (AMD3100) and inhibited invasion of metastatic cells by at least 45%. Selected compounds (2d, 2j, 8a) that inhibited metastatic invasion at a higher rate than WZ811 (62%) were submitted for a carrageenan inflammation test, where both 8a and 2j reduced inflammation in the same range as WZ811 (40%) but did not reduce inflammation more than 40%. Select compounds were also modeled in silico to show key residue interactions. These preliminary results with furan-based and thiophene-based analogues contribute to the new class on heterocyclic aromatic-based CXCR4 antagonists.
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Affiliation(s)
- Theresa Gaines
- Department of Chemistry, Georgia State University, Atlanta, GA, 30303, USA
| | - Francisco Garcia
- Department of Chemistry, Georgia State University, Atlanta, GA, 30303, USA
| | - Saniya Virani
- Department of Chemistry, Georgia State University, Atlanta, GA, 30303, USA
| | - Zhongxing Liang
- Department of Radiology and Imaging Science, Emory University School of Medicine, Atlanta, GA, 30322, USA; Winship Cancer Institute, Emory University, Atlanta, GA, 30322, USA
| | - Younghyoun Yoon
- Winship Cancer Institute, Emory University, Atlanta, GA, 30322, USA
| | - Yoon Hyeun Oum
- Department of Radiology and Imaging Science, Emory University School of Medicine, Atlanta, GA, 30322, USA
| | - Hyunsuk Shim
- Department of Radiology and Imaging Science, Emory University School of Medicine, Atlanta, GA, 30322, USA; Winship Cancer Institute, Emory University, Atlanta, GA, 30322, USA
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14
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Janssens R, Struyf S, Proost P. Pathological roles of the homeostatic chemokine CXCL12. Cytokine Growth Factor Rev 2018; 44:51-68. [PMID: 30396776 DOI: 10.1016/j.cytogfr.2018.10.004] [Citation(s) in RCA: 108] [Impact Index Per Article: 18.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2018] [Accepted: 10/19/2018] [Indexed: 12/12/2022]
Abstract
CXCL12 is a CXC chemokine that traditionally has been classified as a homeostatic chemokine. It contributes to physiological processes such as embryogenesis, hematopoiesis and angiogenesis. In contrast to these homeostatic functions, increased expression of CXCL12 in general, or of a specific CXCL12 splicing variant has been demonstrated in various pathologies. In addition to this increased or differential transcription of CXCL12, also upregulation of its receptors CXC chemokine receptor 4 (CXCR4) and atypical chemokine receptor 3 (ACKR3) contributes to the onset or progression of diseases. Moreover, posttranslational modification of CXCL12 during disease progression, through interaction with locally produced molecules or enzymes, also affects CXCL12 activity, adding further complexity. As CXCL12, CXCR4 and ACKR3 are broadly expressed, the number of pathologies wherein CXCL12 is involved is growing. In this review, the role of the CXCL12/CXCR4/ACKR3 axis will be discussed for the most prevalent pathologies. Administration of CXCL12-neutralizing antibodies or small-molecule antagonists of CXCR4 or ACKR3 delays disease onset or prevents disease progression in cancer, viral infections, inflammatory bowel diseases, rheumatoid arthritis and osteoarthritis, asthma and acute lung injury, amyotrophic lateral sclerosis and WHIM syndrome. On the other hand, CXCL12 has protective properties in Alzheimer's disease and multiple sclerosis, has a beneficial role in wound healing and has crucial homeostatic properties in general.
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Affiliation(s)
- Rik Janssens
- KU Leuven, University of Leuven, Department of Microbiology and Immunology, Rega Institute for Medical Research, Laboratory of Molecular Immunology, B-3000 Leuven, Belgium
| | - Sofie Struyf
- KU Leuven, University of Leuven, Department of Microbiology and Immunology, Rega Institute for Medical Research, Laboratory of Molecular Immunology, B-3000 Leuven, Belgium
| | - Paul Proost
- KU Leuven, University of Leuven, Department of Microbiology and Immunology, Rega Institute for Medical Research, Laboratory of Molecular Immunology, B-3000 Leuven, Belgium.
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15
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Boyle KA, Van Wickle J, Hill RB, Marchese A, Kalyanaraman B, Dwinell MB. Mitochondria-targeted drugs stimulate mitophagy and abrogate colon cancer cell proliferation. J Biol Chem 2018; 293:14891-14904. [PMID: 30087121 DOI: 10.1074/jbc.ra117.001469] [Citation(s) in RCA: 94] [Impact Index Per Article: 15.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2017] [Revised: 07/20/2018] [Indexed: 12/13/2022] Open
Abstract
Mutations in the KRAS proto-oncogene are present in 50% of all colorectal cancers and are increasingly associated with chemotherapeutic resistance to frontline biologic drugs. Accumulating evidence indicates key roles for overactive KRAS mutations in the metabolic reprogramming from oxidative phosphorylation to aerobic glycolysis in cancer cells. Here, we sought to exploit the more negative membrane potential of cancer cell mitochondria as an untapped avenue for interfering with energy metabolism in KRAS variant-containing and KRAS WT colorectal cancer cells. Mitochondrial function, intracellular ATP levels, cellular uptake, energy sensor signaling, and functional effects on cancer cell proliferation were assayed. 3-Carboxyl proxyl nitroxide (Mito-CP) and Mito-Metformin, two mitochondria-targeted compounds, depleted intracellular ATP levels and persistently inhibited ATP-linked oxygen consumption in both KRAS WT and KRAS variant-containing colon cancer cells and had only limited effects on nontransformed intestinal epithelial cells. These anti-proliferative effects reflected the activation of AMP-activated protein kinase (AMPK) and the phosphorylation-mediated suppression of the mTOR target ribosomal protein S6 kinase B1 (RPS6KB1 or p70S6K). Moreover, Mito-CP and Mito-Metformin released Unc-51-like autophagy-activating kinase 1 (ULK1) from mTOR-mediated inhibition, affected mitochondrial morphology, and decreased mitochondrial membrane potential, all indicators of mitophagy. Pharmacological inhibition of the AMPK signaling cascade mitigated the anti-proliferative effects of Mito-CP and Mito-Metformin. This is the first demonstration that drugs selectively targeting mitochondria induce mitophagy in cancer cells. Targeting bioenergetic metabolism with mitochondria-targeted drugs to stimulate mitophagy provides an attractive approach for therapeutic intervention in KRAS WT and overactive mutant-expressing colon cancer.
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Affiliation(s)
- Kathleen A Boyle
- From the Department of Microbiology & Immunology.,MCW Cancer Center, Medical College of Wisconsin, Milwaukee, Wisconsin 53226
| | | | - R Blake Hill
- MCW Cancer Center, Medical College of Wisconsin, Milwaukee, Wisconsin 53226.,Department of Biochemistry
| | - Adriano Marchese
- MCW Cancer Center, Medical College of Wisconsin, Milwaukee, Wisconsin 53226.,Department of Biochemistry
| | - Balaraman Kalyanaraman
- MCW Cancer Center, Medical College of Wisconsin, Milwaukee, Wisconsin 53226.,Department of Biophysics
| | - Michael B Dwinell
- From the Department of Microbiology & Immunology, .,MCW Cancer Center, Medical College of Wisconsin, Milwaukee, Wisconsin 53226.,Department of Surgery, and
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16
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Romain B, Benbrika-Nehmar R, Marisa L, Legrain M, Lobstein V, Oravecz A, Poidevin L, Bour C, Freund JN, Duluc I, Guenot D, Pencreach E. Histone hypoacetylation contributes to CXCL12 downregulation in colon cancer: impact on tumor growth and cell migration. Oncotarget 2018; 8:38351-38366. [PMID: 28418886 PMCID: PMC5503537 DOI: 10.18632/oncotarget.16323] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2016] [Accepted: 02/27/2017] [Indexed: 12/11/2022] Open
Abstract
CXCL12 has been shown to be involved in colon cancer metastasis, but its expression level and molecular mechanisms regulating its expression remain controversial. We thus evaluated CXCL12 expression in a large cohort of colon adenomas and carcinomas, investigated for an epigenetic mechanism controlling its expression and evaluated the impact of CXCL12 levels on cell migration and tumor growth. CXCL12 expression was measured in human colon adenomas and carcinomas with transcriptome array and RT-qPCR. The promoter methylation was analyzed with whole-genome DNA methylation chips and protein expression by immunohistochemistry. We confirm a reduced expression of CXCL12 in 75% of MSS carcinomas and show that the decrease is an early event as already present in adenomas. The methylome analysis shows that the CXCL12 promoter is methylated in only 30% of microsatellite-stable tumors. In vitro, treatments with HDAC inhibitors, butyrate and valproate restored CXCL12 expression in three colon cell lines, increased acetylation of histone H3 within the CXCL12 promoter and inhibited cell migration. In vivo, valproate diminished (65%) the number of intestinal tumors in APC mutant mice, slowed down xenograft tumor growth concomitant to restored CXCL12 expression. Finally we identified loss of PCAF expression in tumor samples and showed that forced expression of PCAF in colon cancer cell lines restored CXCL12 expression. Thus, reduced PCAF expression may participate to CXCL12 promoter hypoacetylation and its subsequent loss of expression. Our study is of potential clinical interest because agents that promote or maintain histone acetylation through HDAC inhibition and/or HAT stimulation, may help to lower colon adenoma/carcinoma incidence, especially in high-risk families, or could be included in therapeutic protocols to treat advanced colon cancer.
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Affiliation(s)
- Benoît Romain
- Université de Strasbourg, Progression Tumorale et Microenvironnement, Approches Translationnelles et Epidémiologie, Strasbourg, France.,Hôpitaux Universitaires de Strasbourg, Service de Chirurgie Générale et Digestive, Strasbourg, France
| | - Radhia Benbrika-Nehmar
- Université de Strasbourg, Progression Tumorale et Microenvironnement, Approches Translationnelles et Epidémiologie, Strasbourg, France
| | - Laetitia Marisa
- Cartes d'Identité des Tumeurs Program, Ligue Nationale Contre le Cancer, Paris, France
| | - Michèle Legrain
- Hôpitaux Universitaires de Strasbourg, Laboratoire de Biochimie et Biologie Moléculaire, Strasbourg, France
| | - Viviane Lobstein
- Université de Strasbourg, Progression Tumorale et Microenvironnement, Approches Translationnelles et Epidémiologie, Strasbourg, France
| | - Attila Oravecz
- Université de Strasbourg, CNRS, Department of Computer Science, ICube, Strasbourg, France
| | - Laetitia Poidevin
- Université de Strasbourg, CNRS, Department of Computer Science, ICube, Strasbourg, France
| | - Cyril Bour
- Université de Strasbourg, Progression Tumorale et Microenvironnement, Approches Translationnelles et Epidémiologie, Strasbourg, France
| | | | - Isabelle Duluc
- Université de Strasbourg, INSERM Unit 1113, Strasbourg, France
| | - Dominique Guenot
- Université de Strasbourg, Progression Tumorale et Microenvironnement, Approches Translationnelles et Epidémiologie, Strasbourg, France
| | - Erwan Pencreach
- Université de Strasbourg, Progression Tumorale et Microenvironnement, Approches Translationnelles et Epidémiologie, Strasbourg, France.,Hôpitaux Universitaires de Strasbourg, Laboratoire de Biochimie et Biologie Moléculaire, Strasbourg, France.,Hôpitaux Universitaires de Strasbourg, Centre de Ressources Biologiques, Département de Pathologie, Strasbourg, France
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17
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Neri M, Sansone L, Pietrasanta L, Kisialiou A, Cabano E, Martini M, Russo MA, Ugolini D, Tafani M, Bonassi S. Gene and protein expression of CXCR4 in adult and elderly patients with chronic rhinitis, pharyngitis or sinusitis undergoing thermal water nasal inhalations. IMMUNITY & AGEING 2018; 15:10. [PMID: 29497453 PMCID: PMC5828426 DOI: 10.1186/s12979-018-0114-y] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/07/2017] [Accepted: 02/06/2018] [Indexed: 01/01/2023]
Abstract
Background Chronic rhinitis, pharyngitis and sinusitis are common health problems with a significant impact on public health, and are suspected to be influenced by ageing factors. Nasal inhalation with thermal water may be used to reduce symptoms, inflammation and drug intake. A pre-post clinical study was conducted in 183 consecutive adult and elderly patients with chronic rhinitis, pharyngitis or sinusitis, to evaluate whether thermal water nasal inhalations could improve their symptoms, clinical signs and rhinomanometry measurements, and influence inflammatory biomarkers levels in nasal epithelial cells. Results Participants profile revealed that they were aged on average (mean age and SD 60.6 ± 15.2 years, median 65, range 20–86, 86 aged ≤ 65 years (47%), 96 aged > 65 years (53%)) and extremely concerned about wellbeing. Older age was associated with better compliance to inhalation treatment. Total symptom and clinical evaluation scores were significantly ameliorated after treatment (p < 0.001), with no substantial difference according to age, while rhinomanometry results were inconsistent. Persistence of symptom improvement was confirmed at phone follow up 1 year later (n = 74). The training set of 48 inflammatory genes (40 patients) revealed a strong increase of CXCR4 gene expression after nasal inhalations, confirmed both in the validation set (143 patients; 1.2 ± 0.68 vs 3.3 ± 1.2; p < 0.0001) and by evaluation of CXCR4 protein expression (40 patients; 1.0 ± 0.39 vs 2.6 ± 0.66; p < 0.0001). CXCR4 expression was consistently changed in patients with rhinitis, pharyngitis or sinusitis. The increase was smaller in current smokers compared to non-smokers. Results were substantially unchanged when comparing aged subjects (≥ 65 years) or the eldest quartile (≥ 71 years) to the others. Other genes showed weaker variations (e.g. FLT1 was reduced only in patients with sinusitis). Conclusions These results confirm the clinical impact of thermal water nasal inhalations on upper respiratory diseases both in adults and elders, and emphasize the role of genes activating tissue repair and inflammatory pathways. Future studies should evaluate CXCR4 as possible therapeutic target or response predictor in patients with chronic rhinitis, pharyngitis or sinusitis. Trial registration Communication to Italian Ministry of Health - ICPOM 000461. Registered 10/11/2014. Electronic supplementary material The online version of this article (10.1186/s12979-018-0114-y) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Monica Neri
- 1Unit of Clinical and Molecular Epidemiology, IRCCS San Raffaele Pisana, Via di Val Cannuta, 247, 00166 Rome, Italy
| | - Luigi Sansone
- 2Department of Cellular and Molecular Pathology, IRCCS San Raffaele Pisana, Rome, Italy.,3Department of Experimental Medicine, Sapienza University of Rome, Rome, Italy
| | - Luisa Pietrasanta
- Terme di Genova, Genoa, Italy.,Terme di Acqui, AcquiTerme (AL), Italy
| | - Aliaksei Kisialiou
- 1Unit of Clinical and Molecular Epidemiology, IRCCS San Raffaele Pisana, Via di Val Cannuta, 247, 00166 Rome, Italy
| | | | - Marina Martini
- Terme di Genova, Genoa, Italy.,Terme di Acqui, AcquiTerme (AL), Italy
| | | | | | - Marco Tafani
- 2Department of Cellular and Molecular Pathology, IRCCS San Raffaele Pisana, Rome, Italy.,3Department of Experimental Medicine, Sapienza University of Rome, Rome, Italy
| | - Stefano Bonassi
- 1Unit of Clinical and Molecular Epidemiology, IRCCS San Raffaele Pisana, Via di Val Cannuta, 247, 00166 Rome, Italy.,9Department of Human Sciences and Quality of Life Promotion, San Raffaele University, Rome, Italy
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18
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Chang P, Zhang B, Shao L, Song W, Shi W, Wang L, Xu T, Li D, Gao X, Qu Y, Dong L, Wang J. Mesenchymal stem cells over-expressing cxcl12 enhance the radioresistance of the small intestine. Cell Death Dis 2018; 9:154. [PMID: 29402989 PMCID: PMC5833479 DOI: 10.1038/s41419-017-0222-1] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2017] [Accepted: 12/07/2017] [Indexed: 12/18/2022]
Abstract
The chemokine C-X-C motif chemokine 12 (CXCL12) greatly impacts various biological processes in mammals, including cell survival, growth and migration. Mesenchymal stem cells (MSCs) are promising tools for carrying foreign genes to treat radiation-induced injuries in the intestinal epithelium. In this study, human adipose-derived MSCs were constructed to over-express the mouse cxcl12 gene to treat such injuries. In vitro, because of the high levels of mouse CXCL12 in conditioned medium produced by mouse cxcl12 gene-modified cells, phosphorylation of Akt at Ser473 and Erk1/2 at Thr202/Thr204 was increased within crypt cells of irradiated organoids compared with unmodified controls. Moreover, intracellular stabilization of β-catenin was achieved after treatment of mouse cxcl12 gene-modified cells with conditioned medium. As a result, survival of crypt cells was maintained and their proliferation was promoted. When delivering mouse cxcl12 gene-modified cells into irradiated BALB/c nude mice, mice were rescued despite the clearance of cells from the host within 1 week. Irradiated mice that received mouse cxcl12 gene-modified MSCs exhibited reduced serum levels of interleukin-1α (IL-1α) and IL-6 as well as elevated levels of CXCL12. Additionally, epithelial recovery from radiation stress was accelerated compared with the irradiated-alone controls. Moreover, mouse cxcl12 gene-modified MSCs were superior to unmodified cells at strengthening host repair responses to radiation stress as well as presenting increased serum CXCL12 levels and decreased serum IL-1α levels. Furthermore, the number of crypt cells that were positive for phosphorylated Akt at Ser473 and phosphorylated Erk1/2 at Thr202/Thr204 increased following treatment with mouse cxcl12 gene-modified MSCs. Thus, cxcl12 gene-modified MSCs confer radioresistance to the intestinal epithelium.
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Affiliation(s)
- Pengyu Chang
- State Key Laboratory of Electroanalytical Chemistry, Chinese Academy of Sciences, 130022, Changchun, China
- Department of Radiation Oncology, First Bethune Hospital of Jilin University, 130021, Changchun, China
| | - Boyin Zhang
- Department of Orthopedics Surgery, China-Japan Union Hospital of Jilin University, 130033, Changchun, China
| | - Lihong Shao
- Department of Radiation Oncology, First Bethune Hospital of Jilin University, 130021, Changchun, China
| | - Wei Song
- Department of Oncology, First Bethune Hospital of Jilin University, 130021, Changchun, China
| | - Weiyan Shi
- Department of Radiation Oncology, First Bethune Hospital of Jilin University, 130021, Changchun, China
| | - Libo Wang
- Department of Radiation Oncology, First Bethune Hospital of Jilin University, 130021, Changchun, China
| | - Tiankai Xu
- Department of Radiation Oncology, First Bethune Hospital of Jilin University, 130021, Changchun, China
| | - Dong Li
- Department of Immunology, College of Basic Medical Sciences, Jilin University, 130021, Changchun, China
- Jilin Province Key Laboratory of Infectious Diseases, Laboratory of Molecular Virology, 130061, Changchun, China
| | - Xiuzhu Gao
- Jilin Province Key Laboratory of Infectious Diseases, Laboratory of Molecular Virology, 130061, Changchun, China
- Department of Hepatology, First Bethune Hospital of Jilin University, Jilin University, 130021, Changchun, China
| | - Yaqin Qu
- Department of Radiation Oncology, First Bethune Hospital of Jilin University, 130021, Changchun, China
| | - Lihua Dong
- Department of Radiation Oncology, First Bethune Hospital of Jilin University, 130021, Changchun, China.
| | - Jin Wang
- State Key Laboratory of Electroanalytical Chemistry, Chinese Academy of Sciences, 130022, Changchun, China.
- Department of Chemistry and Physics, State University of New York at Stony Brook, New York, NY, 11794-3400, USA.
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19
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Saiz ML, Cibrian D, Ramírez-Huesca M, Torralba D, Moreno-Gonzalo O, Sánchez-Madrid F. Tetraspanin CD9 Limits Mucosal Healing in Experimental Colitis. Front Immunol 2017; 8:1854. [PMID: 29312336 PMCID: PMC5742144 DOI: 10.3389/fimmu.2017.01854] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2017] [Accepted: 12/07/2017] [Indexed: 12/19/2022] Open
Abstract
Tetraspanins are a family of proteins with four transmembrane domains that associate between themselves and cluster with other partner proteins, conforming a distinct class of membrane domains, the tetraspanin-enriched microdomains (TEMs). These TEMs constitute macromolecular signaling platforms that regulate key processes in several cellular settings controlling signaling thresholds and avidity of receptors. In this study, we investigated the role of CD9, a tetraspanin that regulates major biological processes such as cell migration and immunological responses, in two mouse models of colitis that have been used to study the pathogenesis of inflammatory bowel disease (IBD). Previous in vitro studies revealed an important role in the interaction of leukocytes with inflamed endothelium, but in vivo evidence of the involvement of CD9 in inflammatory diseases is scarce. Here, we studied the role of CD9 in the pathogenesis of colitis in vivo. Colitis was induced by administration of dextran sodium sulfate (DSS), a chemical colitogen that causes epithelial disruption and intestinal inflammation. CD9−/− mice showed less severe colitis than wild-type counterparts upon exposure to DSS (2% solution) and enhanced survival in response to a lethal DSS dose (4%). Decreased neutrophil and macrophage cell infiltration was observed in colonic tissue from CD9−/− animals, in accordance with their lower serum levels of TNF-α, IL-6, and other proinflammatory cytokines in the colon. The specific role of CD9 in IBD was further dissected by transfer of CD4+ CD45RBhi naive T cells into the Rag1−/− mouse colitis model. However, no significant differences were observed in these settings between both groups, ruling out a role for CD9 in IBD in the lymphoid compartment. Experiments with bone marrow chimeras revealed that CD9 in the non-hematopoietic compartment is involved in colon injury and limits the proliferation of epithelial cells. Our data indicate that CD9 in non-hematopoietic cells plays an important role in colitis by limiting epithelial cell proliferation. Future strategies to repress CD9 expression may be of therapeutic benefit in the treatment of IBD.
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Affiliation(s)
- María Laura Saiz
- Immunology Service, Hospital de la Princesa, Universidad Autónoma de Madrid, Instituto de Investigación Sanitaria del Hospital Universitario de La Princesa, Madrid, Spain.,Department of Vascular Biology and Inflammation, Centro Nacional de Investigaciones Cardiovasculares (CNIC), Madrid, Spain
| | - Danay Cibrian
- Immunology Service, Hospital de la Princesa, Universidad Autónoma de Madrid, Instituto de Investigación Sanitaria del Hospital Universitario de La Princesa, Madrid, Spain.,Department of Vascular Biology and Inflammation, Centro Nacional de Investigaciones Cardiovasculares (CNIC), Madrid, Spain.,CIBER Cardiovascular, Madrid, Spain
| | - Marta Ramírez-Huesca
- Department of Vascular Biology and Inflammation, Centro Nacional de Investigaciones Cardiovasculares (CNIC), Madrid, Spain
| | - Daniel Torralba
- Immunology Service, Hospital de la Princesa, Universidad Autónoma de Madrid, Instituto de Investigación Sanitaria del Hospital Universitario de La Princesa, Madrid, Spain.,Department of Vascular Biology and Inflammation, Centro Nacional de Investigaciones Cardiovasculares (CNIC), Madrid, Spain
| | - Olga Moreno-Gonzalo
- Immunology Service, Hospital de la Princesa, Universidad Autónoma de Madrid, Instituto de Investigación Sanitaria del Hospital Universitario de La Princesa, Madrid, Spain.,Department of Vascular Biology and Inflammation, Centro Nacional de Investigaciones Cardiovasculares (CNIC), Madrid, Spain
| | - Francisco Sánchez-Madrid
- Immunology Service, Hospital de la Princesa, Universidad Autónoma de Madrid, Instituto de Investigación Sanitaria del Hospital Universitario de La Princesa, Madrid, Spain.,Department of Vascular Biology and Inflammation, Centro Nacional de Investigaciones Cardiovasculares (CNIC), Madrid, Spain.,CIBER Cardiovascular, Madrid, Spain
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20
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Kurashima Y, Yamamoto D, Nelson S, Uematsu S, Ernst PB, Nakayama T, Kiyono H. Mucosal Mesenchymal Cells: Secondary Barrier and Peripheral Educator for the Gut Immune System. Front Immunol 2017; 8:1787. [PMID: 29321781 PMCID: PMC5733542 DOI: 10.3389/fimmu.2017.01787] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2017] [Accepted: 11/29/2017] [Indexed: 01/08/2023] Open
Abstract
Stromal connective tissue contains mesenchymal cells, including fibroblasts and myofibroblasts, which line the tissue structure. However, it has been identified that the function of mesenchymal cells is not just structural-they also play critical roles in the creation and regulation of intestinal homeostasis. Thus, mucosal mesenchymal cells instruct intestinal immune cell education (or peripheral immune education) and epithelial cell differentiation thereby shaping the local environment of the mucosal immune system. Malfunction of the mesenchymal cell-mediated instruction system (e.g., fibrosis) leads to pathological conditions such as intestinal stricture.
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Affiliation(s)
- Yosuke Kurashima
- Division of Mucosal Immunology, Department of Microbiology and Immunology, The Institute of Medical Science, The University of Tokyo, Tokyo, Japan.,Division of Clinical Vaccinology, International Research and Development Center for Mucosal Vaccines, The Institute of Medical Science, The University of Tokyo, Tokyo, Japan.,Institute for Global Prominent Research, Chiba University, Chiba, Japan.,Department of Mucosal Immunology, Graduate School of Medicine, Chiba University, Chiba, Japan.,Department of Innovative Medicine, Graduate School of Medicine, Chiba University, Chiba, Japan.,Chiba University-UC San Diego Center for Mucosal Immunology, Allergy, and Vaccines (CU-UCSD cMAV), San Diego, CA, Unites States
| | - Daiki Yamamoto
- Division of Mucosal Immunology, Department of Microbiology and Immunology, The Institute of Medical Science, The University of Tokyo, Tokyo, Japan
| | - Sean Nelson
- Division of Mucosal Immunology, Department of Microbiology and Immunology, The Institute of Medical Science, The University of Tokyo, Tokyo, Japan
| | - Satoshi Uematsu
- Department of Mucosal Immunology, Graduate School of Medicine, Chiba University, Chiba, Japan.,Chiba University-UC San Diego Center for Mucosal Immunology, Allergy, and Vaccines (CU-UCSD cMAV), San Diego, CA, Unites States.,Division of Innate Immune Regulation, International Research and Development Center for Mucosal Vaccines, The Institute of Medical Science, The University of Tokyo, Tokyo, Japan
| | - Peter B Ernst
- Chiba University-UC San Diego Center for Mucosal Immunology, Allergy, and Vaccines (CU-UCSD cMAV), San Diego, CA, Unites States.,Center for Veterinary Sciences and Comparative Medicine, University of California, San Diego, CA, Unites States.,Division of Comparative Pathology and Medicine, Department of Pathology, University of California, San Diego, CA, Unites States
| | - Toshinori Nakayama
- Institute for Global Prominent Research, Chiba University, Chiba, Japan.,Chiba University-UC San Diego Center for Mucosal Immunology, Allergy, and Vaccines (CU-UCSD cMAV), San Diego, CA, Unites States.,Department of Immunology, Graduate School of Medicine, Chiba University, Chiba, Japan
| | - Hiroshi Kiyono
- Division of Mucosal Immunology, Department of Microbiology and Immunology, The Institute of Medical Science, The University of Tokyo, Tokyo, Japan.,Division of Clinical Vaccinology, International Research and Development Center for Mucosal Vaccines, The Institute of Medical Science, The University of Tokyo, Tokyo, Japan.,Chiba University-UC San Diego Center for Mucosal Immunology, Allergy, and Vaccines (CU-UCSD cMAV), San Diego, CA, Unites States.,Department of Immunology, Graduate School of Medicine, Chiba University, Chiba, Japan
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21
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Sebrell TA, Sidar B, Bruns R, Wilkinson RA, Wiedenheft B, Taylor PJ, Perrino BA, Samuelson LC, Wilking JN, Bimczok D. Live imaging analysis of human gastric epithelial spheroids reveals spontaneous rupture, rotation and fusion events. Cell Tissue Res 2017; 371:293-307. [PMID: 29178040 DOI: 10.1007/s00441-017-2726-5] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2017] [Accepted: 10/27/2017] [Indexed: 01/16/2023]
Abstract
Three-dimensional cultures of primary epithelial cells including organoids, enteroids and epithelial spheroids have become increasingly popular for studies of gastrointestinal development, mucosal immunology and epithelial infection. However, little is known about the behavior of these complex cultures in their three-dimensional culture matrix. Therefore, we performed extended time-lapse imaging analysis (up to 4 days) of human gastric epithelial spheroids generated from adult tissue samples in order to visualize the dynamics of the spheroids in detail. Human gastric epithelial spheroids cultured in our laboratory grew to an average diameter of 443.9 ± 34.6 μm after 12 days, with the largest spheroids reaching diameters of >1000 μm. Live imaging analysis revealed that spheroid growth was associated with cyclic rupture of the epithelial shell at a frequency of 0.32 ± 0.1/day, which led to the release of luminal contents. Spheroid rupture usually resulted in an initial collapse, followed by spontaneous re-formation of the spheres. Moreover, spheroids frequently rotated around their axes within the Matrigel matrix, possibly propelled by basolateral pseudopodia-like formations of the epithelial cells. Interestingly, adjacent spheroids occasionally underwent luminal fusion, as visualized by injection of individual spheroids with FITC-Dextran (4 kDa). In summary, our analysis revealed unexpected dynamics in human gastric spheroids that challenge our current view of cultured epithelia as static entities and that may need to be considered when performing spheroid infection experiments.
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Affiliation(s)
- T Andrew Sebrell
- Department of Microbiology and Immunology, Montana State University, 960 Technology Blvd., Bozeman, MT, 59717, USA
| | - Barkan Sidar
- Department of Chemical and Biological Engineering, Montana State University, Bozeman, MT, USA
| | - Rachel Bruns
- Department of Microbiology and Immunology, Montana State University, 960 Technology Blvd., Bozeman, MT, 59717, USA
| | - Royce A Wilkinson
- Department of Microbiology and Immunology, Montana State University, 960 Technology Blvd., Bozeman, MT, 59717, USA
| | - Blake Wiedenheft
- Department of Microbiology and Immunology, Montana State University, 960 Technology Blvd., Bozeman, MT, 59717, USA
| | | | - Brian A Perrino
- Department of Physiology & Cell Biology, Reno School of Medicine, University of Nevada, Reno, NV, USA
| | - Linda C Samuelson
- Department of Molecular and Integrative Physiology, University of Michigan Medical School, Ann Arbor, MI, USA
| | - James N Wilking
- Department of Chemical and Biological Engineering, Montana State University, Bozeman, MT, USA
| | - Diane Bimczok
- Department of Microbiology and Immunology, Montana State University, 960 Technology Blvd., Bozeman, MT, 59717, USA.
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22
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The role of vitamin D in hepatic metastases from colorectal cancer. Clin Transl Oncol 2017; 20:259-273. [PMID: 28801869 DOI: 10.1007/s12094-017-1735-x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2017] [Accepted: 07/30/2017] [Indexed: 02/07/2023]
Abstract
Colorectal cancer (CRC) represents a significant health burden worldwide, comprising approximately 10% of annual cancer cases globally. Hepatic metastases are the most common site of CRC metastasis, and are the leading cause of death in CRC patients. There is strong epidemiologic evidence for an inverse association between vitamin D status and risk of CRC; however, the role of vitamin D in the natural history of liver metastases has not yet been investigated. Several researchers have proposed hallmarks of metastases; crucially, metastases can be blocked by interrupting just one rate-limiting step. Vitamin D status has been implicated in each proposed hallmark of metastasis. The aim of this review is to examine the potential role for vitamin D in reducing the development of hepatic metastases from CRC and outline the candidate mechanisms by which vitamin D may mediate these effects. The results of ongoing randomised intervention trials are eagerly awaited to determine whether addressing vitamin D insufficiency in CRC patients could reduce the occurrence of liver metastases, and the consequent morbidity and mortality.
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23
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McClendon J, Jansing NL, Redente EF, Gandjeva A, Ito Y, Colgan SP, Ahmad A, Riches DWH, Chapman HA, Mason RJ, Tuder RM, Zemans RL. Hypoxia-Inducible Factor 1α Signaling Promotes Repair of the Alveolar Epithelium after Acute Lung Injury. THE AMERICAN JOURNAL OF PATHOLOGY 2017; 187:1772-1786. [PMID: 28618253 PMCID: PMC5530913 DOI: 10.1016/j.ajpath.2017.04.012] [Citation(s) in RCA: 68] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/13/2017] [Accepted: 04/20/2017] [Indexed: 01/09/2023]
Abstract
During the acute respiratory distress syndrome, epithelial cells, primarily alveolar type (AT) I cells, die and slough off, resulting in enhanced permeability. ATII cells proliferate and spread onto the denuded basement membrane to reseal the barrier. Repair of the alveolar epithelium is critical for clinical recovery; however, mechanisms underlying ATII cell proliferation and spreading are not well understood. We hypothesized that hypoxia-inducible factor (HIF)1α promotes proliferation and spreading of ATII cells during repair after lung injury. Mice were treated with lipopolysaccharide or hydrochloric acid. HIF activation in ATII cells after injury was demonstrated by increased luciferase activity in oxygen degradation domain-Luc (HIF reporter) mice and expression of the HIF1α target gene GLUT1. ATII cell proliferation during repair was attenuated in ATII cell-specific HIF1α knockout (SftpcCreERT2+/-;HIF1αf/f) mice. The HIF target vascular endothelial growth factor promoted ATII cell proliferation in vitro and after lung injury in vivo. In the scratch wound assay of cell spreading, HIF stabilization accelerated, whereas HIF1α shRNA delayed wound closure. SDF1 and its receptor, CXCR4, were found to be HIF1α-regulated genes in ATII cells and were up-regulated during lung injury. Stromal cell-derived factor 1/CXCR4 inhibition impaired cell spreading and delayed the resolution of permeability after lung injury. We conclude that HIF1α is activated in ATII cells after lung injury and promotes proliferation and spreading during repair.
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Affiliation(s)
- Jazalle McClendon
- Division of Pulmonary, Critical Care, and Sleep Medicine, Department of Medicine, National Jewish Health, Denver, Colorado
| | - Nicole L Jansing
- Division of Pulmonary, Critical Care, and Sleep Medicine, Department of Medicine, National Jewish Health, Denver, Colorado
| | - Elizabeth F Redente
- Program in Cell Biology, Department of Pediatrics, National Jewish Health, Denver, Colorado; Division of Pulmonary Sciences and Critical Care Medicine, University of Colorado Denver, Aurora, Colorado; Department of Research, Denver Veterans Affairs Medical Center, Denver, Colorado
| | - Aneta Gandjeva
- Division of Pulmonary Sciences and Critical Care Medicine, University of Colorado Denver, Aurora, Colorado
| | - Yoko Ito
- Division of Pulmonary, Critical Care, and Sleep Medicine, Department of Medicine, National Jewish Health, Denver, Colorado
| | - Sean P Colgan
- Mucosal Inflammation Program, Division of Pulmonary Sciences and Critical Care Medicine, University of Colorado Denver, Aurora, Colorado; Integrated Department of Immunology, Division of Pulmonary Sciences and Critical Care Medicine, University of Colorado Denver, Aurora, Colorado
| | - Aftab Ahmad
- Department of Anesthesiology and Perioperative Medicine, University of Alabama at Birmingham, Birmingham, Alabama
| | - David W H Riches
- Program in Cell Biology, Department of Pediatrics, National Jewish Health, Denver, Colorado; Division of Pulmonary Sciences and Critical Care Medicine, University of Colorado Denver, Aurora, Colorado
| | - Harold A Chapman
- Division of Pulmonary and Critical Care Medicine, University of California San Francisco, San Francisco, California
| | - Robert J Mason
- Division of Pulmonary, Critical Care, and Sleep Medicine, Department of Medicine, National Jewish Health, Denver, Colorado; Division of Pulmonary Sciences and Critical Care Medicine, University of Colorado Denver, Aurora, Colorado
| | - Rubin M Tuder
- Division of Pulmonary Sciences and Critical Care Medicine, University of Colorado Denver, Aurora, Colorado; Program in Translational Lung Research, Division of Pulmonary Sciences and Critical Care Medicine, University of Colorado Denver, Aurora, Colorado
| | - Rachel L Zemans
- Division of Pulmonary, Critical Care, and Sleep Medicine, Department of Medicine, National Jewish Health, Denver, Colorado; Division of Pulmonary Sciences and Critical Care Medicine, University of Colorado Denver, Aurora, Colorado.
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24
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Patterson AM, Watson AJM. Deciphering the Complex Signaling Systems That Regulate Intestinal Epithelial Cell Death Processes and Shedding. Front Immunol 2017; 8:841. [PMID: 28769935 PMCID: PMC5513916 DOI: 10.3389/fimmu.2017.00841] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2017] [Accepted: 07/04/2017] [Indexed: 01/16/2023] Open
Abstract
Intestinal epithelial cells play a fundamental role in maintaining homeostasis. Shedding of intestinal cells in a controlled manner is critical to maintenance of barrier function. Barrier function is maintained during this shedding process by a redistribution of tight junctional proteins to facilitate closure of the gap left by the shedding cell. However, despite the obvious importance of epithelial cell shedding to gut health, a central question is how the extrusion of epithelial cells is achieved, enabling barrier integrity to be maintained in the healthy gut and restored during inflammation remains largely unanswered. Recent studies have provided evidence that excessive epithelial cell shedding and loss of epithelial barrier integrity is triggered by exposure to lipopolysaccharide or tumor necrosis factor alpha. Subsequent studies have provided evidence of the involvement of specific cellular components and signaling mechanisms as well as the functionality of microbiota that can be either detrimental or beneficial for intestinal barrier integrity. This review will focus on the evidence and decipher how the signaling systems through which the mucosal immune system and microbiota can regulate epithelial cell shedding and how these mechanisms interact to preserve the viability of the epithelium.
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Affiliation(s)
- Angela M Patterson
- Quadram Institute, Norwich Research Park, Norwich, United Kingdom.,Norwich Medical School, University of East Anglia, Norwich, United Kingdom
| | - Alastair J M Watson
- Quadram Institute, Norwich Research Park, Norwich, United Kingdom.,Norwich Medical School, University of East Anglia, Norwich, United Kingdom
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25
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Abstract
Trefoil factor (TFF) peptides, with a 40-amino acid motif and including six conserved cysteine residues that form intramolecular disulfide bonds, are a family of mucin-associated secretory molecules mediating many physiological roles that maintain and restore gastrointestinal (GI) mucosal homeostasis. TFF peptides play important roles in response to GI mucosal injury and inflammation. In response to acute GI mucosal injury, TFF peptides accelerate cell migration to seal the damaged area from luminal contents, whereas chronic inflammation leads to increased TFF expression to prevent further progression of disease. Although much evidence supports the physiological significance of TFF peptides in mucosal defenses, the molecular and cellular mechanisms of TFF peptides in the GI epithelium remain largely unknown. In this review, we summarize the functional roles of TFF1, 2, and 3 and illustrate their action mechanisms, focusing on defense mechanisms in the GI tract.
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Affiliation(s)
- Eitaro Aihara
- Department of Molecular and Cellular Physiology, University of Cincinnati, Cincinnati, Ohio 45267;
| | - Kristen A Engevik
- Department of Molecular and Cellular Physiology, University of Cincinnati, Cincinnati, Ohio 45267;
| | - Marshall H Montrose
- Department of Molecular and Cellular Physiology, University of Cincinnati, Cincinnati, Ohio 45267;
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26
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Ramhorst R, Grasso E, Paparini D, Hauk V, Gallino L, Calo G, Vota D, Pérez Leirós C. Decoding the chemokine network that links leukocytes with decidual cells and the trophoblast during early implantation. Cell Adh Migr 2016; 10:197-207. [PMID: 26891097 DOI: 10.1080/19336918.2015.1135285] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
Chemokine network is central to the innate and adaptive immunity and entails a variety of proteins and membrane receptors that control physiological processes such as wound healing, angiogenesis, embryo growth and development. During early pregnancy, the chemokine network coordinates not only the recruitment of different leukocyte populations to generate the maternal-placental interface, but also constitutes an additional checkpoint for tissue homeostasis maintenance. The normal switch from a pro-inflammatory to an anti-inflammatory predominant microenvironment characteristic of the post-implantation stage requires redundant immune tolerance circuits triggered by key master regulators. In this review we will focus on the recruitment and conditioning of maternal immune cells to the uterus at the early implantation period with special interest on high plasticity macrophages and dendritic cells and their ability to induce regulatory T cells. We will also point to putative immunomodulatory polypeptides involved in immune homeostasis maintenance at the maternal-placental interface.
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Affiliation(s)
- Rosanna Ramhorst
- a Immunopharmacology Laboratory, School of Sciences, University of Buenos Aires, IQUIBICEN-CONICET , Buenos Aires , Argentina
| | - Esteban Grasso
- a Immunopharmacology Laboratory, School of Sciences, University of Buenos Aires, IQUIBICEN-CONICET , Buenos Aires , Argentina
| | - Daniel Paparini
- a Immunopharmacology Laboratory, School of Sciences, University of Buenos Aires, IQUIBICEN-CONICET , Buenos Aires , Argentina
| | - Vanesa Hauk
- a Immunopharmacology Laboratory, School of Sciences, University of Buenos Aires, IQUIBICEN-CONICET , Buenos Aires , Argentina
| | - Lucila Gallino
- a Immunopharmacology Laboratory, School of Sciences, University of Buenos Aires, IQUIBICEN-CONICET , Buenos Aires , Argentina
| | - Guillermina Calo
- a Immunopharmacology Laboratory, School of Sciences, University of Buenos Aires, IQUIBICEN-CONICET , Buenos Aires , Argentina
| | - Daiana Vota
- a Immunopharmacology Laboratory, School of Sciences, University of Buenos Aires, IQUIBICEN-CONICET , Buenos Aires , Argentina
| | - Claudia Pérez Leirós
- a Immunopharmacology Laboratory, School of Sciences, University of Buenos Aires, IQUIBICEN-CONICET , Buenos Aires , Argentina
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27
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Roy I, McAllister DM, Gorse E, Dixon K, Piper CT, Zimmerman NP, Getschman AE, Tsai S, Engle DD, Evans DB, Volkman BF, Kalyanaraman B, Dwinell MB. Pancreatic Cancer Cell Migration and Metastasis Is Regulated by Chemokine-Biased Agonism and Bioenergetic Signaling. Cancer Res 2015; 75:3529-42. [PMID: 26330165 DOI: 10.1158/0008-5472.can-14-2645] [Citation(s) in RCA: 49] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Patients with pancreatic ductal adenocarcinoma (PDAC) invariably succumb to metastatic disease, but the underlying mechanisms that regulate PDAC cell movement and metastasis remain little understood. In this study, we investigated the effects of the chemokine gene CXCL12, which is silenced in PDAC tumors, yet is sufficient to suppress growth and metastasis when re-expressed. Chemokines like CXCL12 regulate cell movement in a biphasic pattern, with peak migration typically in the low nanomolar concentration range. Herein, we tested the hypothesis that the biphasic cell migration pattern induced by CXCL12 reflected a biased agonist bioenergetic signaling that might be exploited to interfere with PDAC metastasis. In human and murine PDAC cell models, we observed that nonmigratory doses of CXCL12 were sufficient to decrease oxidative phosphorylation and glycolytic capacity and to increase levels of phosphorylated forms of the master metabolic kinase AMPK. Those same doses of CXCL12 locked myosin light chain into a phosphorylated state, thereby decreasing F-actin polymerization and preventing cell migration in a manner dependent upon AMPK and the calcium-dependent kinase CAMKII. Notably, at elevated concentrations of CXCL12 that were insufficient to trigger chemotaxis of PDAC cells, AMPK blockade resulted in increased cell movement. In two preclinical mouse models of PDAC, administration of CXCL12 decreased tumor dissemination, supporting our hypothesis that chemokine-biased agonist signaling may offer a useful therapeutic strategy. Our results offer a mechanistic rationale for further investigation of CXCL12 as a potential therapy to prevent or treat PDAC metastasis.
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Affiliation(s)
- Ishan Roy
- Department of Microbiology & Molecular Genetics, Medical College of Wisconsin, Milwaukee, Wisconsin
| | - Donna M McAllister
- Department of Microbiology & Molecular Genetics, Medical College of Wisconsin, Milwaukee, Wisconsin. Department of Biophysics, Medical College of Wisconsin, Milwaukee, Wisconsin
| | - Egal Gorse
- Department of Microbiology & Molecular Genetics, Medical College of Wisconsin, Milwaukee, Wisconsin
| | - Kate Dixon
- Department of Microbiology & Molecular Genetics, Medical College of Wisconsin, Milwaukee, Wisconsin
| | - Clinton T Piper
- Department of Microbiology & Molecular Genetics, Medical College of Wisconsin, Milwaukee, Wisconsin
| | - Noah P Zimmerman
- Department of Microbiology & Molecular Genetics, Medical College of Wisconsin, Milwaukee, Wisconsin. MCW Cancer Center, Medical College of Wisconsin, Milwaukee, Wisconsin
| | - Anthony E Getschman
- Department of Biochemistry, Medical College of Wisconsin, Milwaukee, Wisconsin
| | - Susan Tsai
- MCW Cancer Center, Medical College of Wisconsin, Milwaukee, Wisconsin. Department of Surgery, Medical College of Wisconsin, Milwaukee, Wisconsin
| | | | - Douglas B Evans
- MCW Cancer Center, Medical College of Wisconsin, Milwaukee, Wisconsin. Department of Surgery, Medical College of Wisconsin, Milwaukee, Wisconsin
| | - Brian F Volkman
- Department of Biochemistry, Medical College of Wisconsin, Milwaukee, Wisconsin
| | - Balaraman Kalyanaraman
- Department of Biophysics, Medical College of Wisconsin, Milwaukee, Wisconsin. MCW Cancer Center, Medical College of Wisconsin, Milwaukee, Wisconsin
| | - Michael B Dwinell
- Department of Microbiology & Molecular Genetics, Medical College of Wisconsin, Milwaukee, Wisconsin. MCW Cancer Center, Medical College of Wisconsin, Milwaukee, Wisconsin.
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28
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Sun Y, Mao X, Fan C, Liu C, Guo A, Guan S, Jin Q, Li B, Yao F, Jin F. CXCL12-CXCR4 axis promotes the natural selection of breast cancer cell metastasis. Tumour Biol 2014; 35:7765-73. [PMID: 24810923 PMCID: PMC4158177 DOI: 10.1007/s13277-014-1816-1] [Citation(s) in RCA: 75] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2013] [Accepted: 03/04/2014] [Indexed: 12/14/2022] Open
Abstract
CXCR4 and its ligand CXCL12 can promote the proliferation, survival, and invasion of cancer cells. They have been shown to play an important role in regulating metastasis of breast cancer to specific organs. High CXCR4 expression was also correlated to poor clinical outcome. Previous study also showed that tumor cells express a high level of CXCR4 and that tumor metastasis target tissues (lung, liver, and bone) express high levels of the ligand CXCL12, allowing tumor cells to directionally migrate to target organs via a CXCL12-CXCR4 chemotactic gradient. However, the exact mechanisms of how CXCR4 and CXCL12 enhance metastasis and/or tumor growth and their full implications on breast cancer progression are unknown. Yet it is likely that chemokine receptor signaling may provide more than just a migrational advantage by also helping the metastasized cells establish and survive in secondary environments. In this study, we investigated CXCR4 and CXCL12 expression in breast cancer and analyzed its association with clinicopathological factors by immunohistochemistry first. Then, we detected the mRNA and protein expression of CXCR4 and CXCL12 in breast cancer cell lines by Western blot and RT-PCR. The MDA-MB-231 has CXCR4 expression and very weak CXCL12 expression. So, we constructed the functional CXCL12 expression in MDA-MB-231 using a gene transfection technique. Further experiments were conducted to evaluate the effect of CXCL12 transfection on the biological behaviors of MDA-MB-231. The cell proliferation of MDA-MB-231–CXCL12 was accessed by MTT assay; the apoptosis was analyzed by an AnnexinV-FITC/propidium iodide double staining of flow cytometry method; and the cell invasive ability was examined by Matrigel invasion assay. Immunohistochemical analysis showed the co-expression of CXCR4 and CXCL12 correlated with lymph node metastasis and TNM stage (p < 0.01). It suggested that the chemokine CXCL12 and its sole ligand CXCR4 play important role in the malignance of breast cancer. To gain a deeper insight into it, we picked CXCR4-expressing cells MDA-MB-231 to be transfected with CXCL12 stably. The decreased cellular proliferation, increased apoptosis, and invasive ability were found in MDA-MB-231 with successful CXCL12 transfection (p < 0.05). Our findings underlined the CXCL12-CXCR4 axis correlated tightly with breast cancer metastasis. CXCL12-CXCR4 axis can increase the invasion and apoptosis of MDA-MB-231 simultaneously. These data strongly support the hypothesis that CXCL12-CXCR4 axis promotes the natural selection of breast cancer cell metastasis. Our findings could have significant implications in terms of breast cancer aggressiveness and the effectiveness of targeting the receptors and downstream signaling pathways for the treatment of breast cancer.
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Affiliation(s)
- Yanan Sun
- Department of Breast Surgery, Department of Surgical Oncology, Research Unit of General Surgery, The First Affiliated Hospital of China Medical University, 155 Nanjing North Street, Heping District, Shenyang, Liaoning, 110001, People's Republic of China
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29
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The role of polymorphisms of genes CXCL12/CXCR4 and MIF in the risk development IBD the Polish population. Mol Biol Rep 2014; 41:4639-52. [PMID: 24687413 DOI: 10.1007/s11033-014-3335-y] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2013] [Accepted: 09/14/2013] [Indexed: 01/06/2023]
Abstract
Inflammatory bowel disease (IBD) are characterized recurrent inflammation of gastrointestinal tract. The etiology and pathogenesis this disease is currently unclear, but it has become evident that immune and genetic factors are involved in this process. The aim of this study was to determine whether gene polymorphisms: MIF-173 G/C; CXCL12-801 G/A and CXCR4 C/T exon 2 position of rs2228014 is associated with susceptibility to IBD. A total of 286 patients were examined with IBD, including 152 patients with ulcerative colitis and 134 with Crohn's disease (CD) and 220 healthy subjects were recruited from the Polish population. Genotyping for polymorphisms in CXCL12/CXCR4 and MIF was performed by RFLP-PCR. Statistical significance was found for polymorphisms CXCR4, a receptor gene for CXCL12 genotypes and alleles in CD and for genotype C/T and T allele in ulcerative colitis with respect to control. This confirms the effect of CXCL12 gene. The interplay between CXCL12 and its receptor CXCR4 affects homeostasis and inflammation in the intestinal mucosa. Three-gene analysis in CD confirmed the association of genotype GGGGCT. Statistical analysis of clinical data of patients with ulcerative colitis showed significant differences in the distribution of genotype C/T and T allele for CXCR4 in the left-side colitis. Having CXCR4/CXCL12 chemokine axis polymorphisms may predispose to the development of IBD. Activation can also be their defensive reaction to the long-lasting inflammation.
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30
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Roy I, Zimmerman NP, Mackinnon AC, Tsai S, Evans DB, Dwinell MB. CXCL12 chemokine expression suppresses human pancreatic cancer growth and metastasis. PLoS One 2014; 9:e90400. [PMID: 24594697 PMCID: PMC3942415 DOI: 10.1371/journal.pone.0090400] [Citation(s) in RCA: 67] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2013] [Accepted: 01/29/2014] [Indexed: 12/13/2022] Open
Abstract
Pancreatic ductal adenocarcinoma is an unsolved health problem with nearly 75% of patients diagnosed with advanced disease and an overall 5-year survival rate near 5%. Despite the strong link between mortality and malignancy, the mechanisms behind pancreatic cancer dissemination and metastasis are poorly understood. Correlative pathological and cell culture analyses suggest the chemokine receptor CXCR4 plays a biological role in pancreatic cancer progression. In vivo roles for the CXCR4 ligand CXCL12 in pancreatic cancer malignancy were investigated. CXCR4 and CXCR7 were consistently expressed in normal and cancerous pancreatic ductal epithelium, established cell lines, and patient-derived primary cancer cells. Relative to healthy exocrine ducts, CXCL12 expression was pathologically repressed in pancreatic cancer tissue specimens and patient-derived cell lines. To test the functional consequences of CXCL12 silencing, pancreatic cancer cell lines stably expressingthe chemokine were engineered. Consistent with a role for CXCL12 as a tumor suppressor, cells producing the chemokine wereincreasingly adherent and migration deficient in vitro and poorly metastatic in vivo, compared to control cells. Further, CXCL12 reintroduction significantly reduced tumor growth in vitro, with significantly smaller tumors in vivo, leading to a pronounced survival advantage in a preclinical model. Together, these data demonstrate a functional tumor suppressive role for the normal expression of CXCL12 in pancreatic ducts, regulating both tumor growth andcellulardissemination to metastatic sites.
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Affiliation(s)
- Ishan Roy
- Department of Microbiology and Molecular Genetics, Medical College of Wisconsin, Milwaukee, Wisconsin, United States of America
| | - Noah P. Zimmerman
- Department of Microbiology and Molecular Genetics, Medical College of Wisconsin, Milwaukee, Wisconsin, United States of America
| | - A. Craig Mackinnon
- Department of Pathology, Medical College of Wisconsin, Milwaukee, Wisconsin, United States of America
| | - Susan Tsai
- Department of Surgery, Medical College of Wisconsin, Milwaukee, Wisconsin, United States of America
| | - Douglas B. Evans
- Department of Surgery, Medical College of Wisconsin, Milwaukee, Wisconsin, United States of America
| | - Michael B. Dwinell
- Department of Microbiology and Molecular Genetics, Medical College of Wisconsin, Milwaukee, Wisconsin, United States of America
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31
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Roy I, Evans DB, Dwinell MB. Chemokines and chemokine receptors: update on utility and challenges for the clinician. Surgery 2014; 155:961-73. [PMID: 24856117 DOI: 10.1016/j.surg.2014.02.006] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2013] [Accepted: 02/05/2014] [Indexed: 11/26/2022]
Affiliation(s)
- Ishan Roy
- Department of Microbiology and Molecular Genetics, Medical College of Wisconsin, Milwaukee, WI
| | - Douglas B Evans
- Department of Surgery, Medical College of Wisconsin, Milwaukee, WI
| | - Michael B Dwinell
- Department of Microbiology and Molecular Genetics, Medical College of Wisconsin, Milwaukee, WI.
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32
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Epithelial tyrosine phosphatase SHP-2 protects against intestinal inflammation in mice. Mol Cell Biol 2013; 33:2275-84. [PMID: 23530062 DOI: 10.1128/mcb.00043-13] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Abstract
Polymorphisms of PTPN11 encoding SHP-2 are biomarkers for ulcerative colitis (UC) susceptibility. However, their functional relevance is unknown. We thus investigated the role of epithelial SHP-2 in the control of intestinal homeostasis. Mice with an intestinal epithelial cell-specific SHP-2 deletion (SHP-2(IEC-KO) mice) were generated. Control and SHP-2(IEC-KO) mice were monitored for clinical symptoms and sacrificed for histological staining and Western blot analyses. Cytokines and chemokines, as well as intestinal permeability, were quantified. SHP-2 mRNA expression was evaluated in control and UC patients. SHP-2(IEC-KO) mice showed growth retardation compared to control littermates and rapidly developed severe colitis. Colon architecture was markedly altered with infiltration of immune cells, crypt abscesses, neutrophil accumulation, and reduced goblet cell numbers. Decreased expression of claudins was associated with enhanced intestinal permeability in mutant SHP-2(IEC-KO) mice. Inflammatory transcription factors Stat3 and NF-κB were hyperactivated early in the mutant colonic epithelium. Levels of several epithelial chemokines and cytokines were markedly enhanced in SHP-2(IEC-KO) mice. Of note, antibiotic treatment remarkably impaired the development of colitis in SHP-2(IEC-KO) mice. Finally, SHP-2 mRNA levels were significantly reduced in intestinal biopsy specimens from UC patients. Our results establish intestinal epithelial SHP-2 as a critical determinant for prevention of gut inflammation.
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Werner L, Guzner-Gur H, Dotan I. Involvement of CXCR4/CXCR7/CXCL12 Interactions in Inflammatory bowel disease. Theranostics 2013; 3:40-6. [PMID: 23382785 PMCID: PMC3563080 DOI: 10.7150/thno.5135] [Citation(s) in RCA: 67] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2012] [Accepted: 11/25/2012] [Indexed: 11/05/2022] Open
Abstract
Directional movement of cells in the human body is orchestrated via chemokines. This migration was initially identified in pathological and immunological processes but quickly extended to homeostatic cell trafficking. One such chemokine is the ubiquitous CXCL12 (initially called SDF1-α) which signals via the chemokine receptors CXCR4 and CXCR7. In the last decade CXCL12 was recognized to participate not only in embryonic development and homeostatic maintenance, but also in progression of inflammation. A role for CXCL12 and its receptors CXCR4 and CXCR7 in inflammatory bowel diseases was recently shown. The current review discusses up to date knowledge of CXCL12 in inflammation, focusing on the involvement of CXCL12 and its receptors, CXCR4 and CXCR7, in inflammatory bowel diseases.
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Zimmerman NP, Kumar SN, Turner JR, Dwinell MB. Cyclic AMP dysregulates intestinal epithelial cell restitution through PKA and RhoA. Inflamm Bowel Dis 2012; 18:1081-91. [PMID: 21993975 PMCID: PMC3258471 DOI: 10.1002/ibd.21898] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/12/2011] [Accepted: 08/22/2011] [Indexed: 01/17/2023]
Abstract
BACKGROUND Mucosal homeostasis is dependent on the establishment and maintenance of the cell-cell contacts that comprise the physiological barrier. Breaks in the barrier are linked to multiple diseases such as inflammatory bowel disease. While increased cyclic adenosine monophosphate (cAMP) levels limit inflammation by decreasing leukocyte infiltration, the effects of elevated cAMP on intestinal epithelial repair are unknown. METHODS Restitution in animals administered rolipram was monitored by microscopic examination after laser wounding of the intestinal epithelium or in mice treated with dextran sodium sulfate (DSS). In vitro analysis was conducted using IEC6 and T84 cells to determine the role of elevated cAMP in altering Rho-dependent cellular migration signaling pathways. RESULTS We show that treatment with rolipram, forskolin, and cAMP analogs decrease intestinal epithelial cell migration in vitro. In vivo cell imaging revealed that increased cAMP resulted in a decreased cellular migration rate, with cells at the edge displaying the highest activity. As expected, elevated cAMP elicited increased protein kinase A (PKA) activity, in turn resulting in the inactivation and sequestration of RhoA and decreased actin reorganization. The ablation of restitution by cAMP was not restricted to cell culture, as forskolin and rolipram treatment significantly decreased epithelial microwound closure induced by the two photon confocal injury model. CONCLUSIONS Together, these data suggest that administration of cAMP-elevating agents paradoxically decrease infiltration of damage-causing leukocytes while also preventing epithelial repair and barrier maintenance. We propose that treatment with cAMP-elevating agents severely limits mucosal reepithelialization and should be contraindicated for use in chronic inflammatory bowel disorders.
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Affiliation(s)
- Noah P. Zimmerman
- Microbiology and Molecular Genetics, Medical College of Wisconsin, 8701 Watertown Plank Road, Milwaukee, WI 53226
| | - Suresh N. Kumar
- Department of Pathology, Medical College of Wisconsin, 8701 Watertown Plank Road, Milwaukee, WI 53226
| | | | - Michael B. Dwinell
- Microbiology and Molecular Genetics, Medical College of Wisconsin, 8701 Watertown Plank Road, Milwaukee, WI 53226
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Hwang S, Zimmerman NP, Agle KA, Turner JR, Kumar SN, Dwinell MB. E-cadherin is critical for collective sheet migration and is regulated by the chemokine CXCL12 protein during restitution. J Biol Chem 2012; 287:22227-40. [PMID: 22549778 DOI: 10.1074/jbc.m112.367979] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023] Open
Abstract
Chemokines and other immune mediators enhance epithelial barrier repair. The intestinal barrier is established by highly regulated cell-cell contacts between epithelial cells. The goal of these studies was to define the role for the chemokine CXCL12 in regulating E-cadherin during collective sheet migration during epithelial restitution. Mechanisms regulating E-cadherin were investigated using Caco2(BBE) and IEC-6 model epithelia. Genetic knockdown confirmed a critical role for E-cadherin in in vitro restitution and in vivo wound repair. During restitution, both CXCL12 and TGF-β1 tightened the monolayer by decreasing the paracellular space between migrating epithelial cells. However, CXCL12 differed from TGF-β1 by stimulating the significant increase in E-cadherin membrane localization during restitution. Chemokine-stimulated relocalization of E-cadherin was paralleled by an increase in barrier integrity of polarized epithelium during restitution. CXCL12 activation of its cognate receptor CXCR4 stimulated E-cadherin localization and monolayer tightening through Rho-associated protein kinase activation and F-actin reorganization. These data demonstrate a key role for E-cadherin in intestinal epithelial restitution.
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Affiliation(s)
- Soonyean Hwang
- Department of Microbiology and Molecular Genetics, Medical College of Wisconsin, Milwaukee, Wisconsin 53226, USA
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Ghosh MC, Makena PS, Gorantla V, Sinclair SE, Waters CM. CXCR4 regulates migration of lung alveolar epithelial cells through activation of Rac1 and matrix metalloproteinase-2. Am J Physiol Lung Cell Mol Physiol 2012; 302:L846-56. [PMID: 22345572 DOI: 10.1152/ajplung.00321.2011] [Citation(s) in RCA: 51] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
Restoration of the epithelial barrier following acute lung injury is critical for recovery of lung homeostasis. After injury, alveolar type II epithelial (ATII) cells spread and migrate to cover the denuded surface and, eventually, proliferate and differentiate into type I cells. The chemokine CXCL12, also known as stromal cell-derived factor 1α, has well-recognized roles in organogenesis, hematopoiesis, and immune responses through its binding to the chemokine receptor CXCR4. While CXCL12/CXCR4 signaling is known to be important in immune cell migration, the role of this chemokine-receptor interaction has not been studied in alveolar epithelial repair mechanisms. In this study, we demonstrated that secretion of CXCL12 was increased in the bronchoalveolar lavage of rats ventilated with an injurious tidal volume (25 ml/kg). We also found that CXCL12 secretion was increased by primary rat ATII cells and a mouse alveolar epithelial (MLE12) cell line following scratch wounding and that both types of cells express CXCR4. CXCL12 significantly increased ATII cell migration in a scratch-wound assay. When we treated cells with a specific antagonist for CXCR4, AMD-3100, cell migration was significantly inhibited. Knockdown of CXCR4 by short hairpin RNA (shRNA) caused decreased cell migration compared with cells expressing a nonspecific shRNA. Treatment with AMD-3100 decreased matrix metalloproteinase-14 expression, increased tissue inhibitor of metalloproteinase-3 expression, decreased matrix metalloproteinase-2 activity, and prevented CXCL12-induced Rac1 activation. Similar results were obtained with shRNA knockdown of CXCR4. These findings may help identify a therapeutic target for augmenting epithelial repair following acute lung injury.
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Affiliation(s)
- Manik C Ghosh
- Department of Physiology, Univ. of Tennessee Health Science Center, Memphis, TN 38163, USA
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Agle KA, Vongsa RA, Dwinell MB. Chemokine stimulation promotes enterocyte migration through laminin-specific integrins. Am J Physiol Gastrointest Liver Physiol 2011; 301:G968-80. [PMID: 21921288 PMCID: PMC3233784 DOI: 10.1152/ajpgi.00208.2011] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
Intestinal homeostasis is regulated in part by the single cell layer of the mucosal epithelium. This physical barrier is a prominent part of the innate immune system and possesses an intrinsic ability to heal damage and limit infection. The restitutive epithelial migration phase of healing requires dynamic integrin adhesion to the extracellular matrix. Previously, we have shown that the homeostatic chemokine CXCL12 utilizes intracellular calcium to increase enterocyte migration on laminin. The aim of these studies was to investigate integrin specificity and, in turn, functional responses elicited by CXCL12 stimulation. Analysis of cellular adhesion and spreading revealed CXCL12 preferentially activated laminin-specific integrins compared with collagen IV-binding integrins. Laminin-specific cell adhesion and spreading elicited by CXCL12 was dependent on intracellular calcium. CXCL12 increased activated β1-integrins on the surface of epithelial cells compared with untreated cells. RT-PCR confirmed expression of the laminin-binding integrins-α3β1, -α6β1, and -α6β4. Interestingly, shRNA-mediated depletion of laminin-specific α3- or α6-integrin subunits revealed differential functions. α3-Integrin knockdown reduced basal as well as inducible restitution. Depletion of α6-integrin specifically abolished CXCL12-stimulated, but not TGF-β1 or basal, migration. Depletion with either shα3-integrin or shα6-integrin prevented CXCL12-evoked cell spreading. Our data indicate that CXCL12 stimulates the inside-out activation of laminin-specific integrins to promote cell migratory functions. Together, our findings support the notion that extracellular mediators within the gastrointestinal mucosa coordinate cell-matrix interactions during epithelial restitution.
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Affiliation(s)
- Kimberle A. Agle
- Department of Microbiology and Molecular Genetics, Medical College of Wisconsin, Milwaukee, Wisconsin
| | - Rebecca A. Vongsa
- Department of Microbiology and Molecular Genetics, Medical College of Wisconsin, Milwaukee, Wisconsin
| | - Michael B. Dwinell
- Department of Microbiology and Molecular Genetics, Medical College of Wisconsin, Milwaukee, Wisconsin
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Monomeric and dimeric CXCL12 inhibit metastasis through distinct CXCR4 interactions and signaling pathways. Proc Natl Acad Sci U S A 2011; 108:17655-60. [PMID: 21990345 DOI: 10.1073/pnas.1101133108] [Citation(s) in RCA: 165] [Impact Index Per Article: 12.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
Chemokines and chemokine receptors are extensively and broadly involved in cancer metastasis. Previously, we demonstrated that epigenetic silencing of the chemokine CXCL12 sensitizes breast and colon cancer cells to endocrine signaling and metastasis to distant tissues. Yet, the precise mechanism whereby CXCL12 production by tumor cells regulates dissemination remains unclear. Here, we show that administration of CXCL12 extended survival of tumor-bearing mice by potently limiting metastasis of colorectal carcinoma or murine melanoma. Because secreted CXCL12 is a mixture of monomeric and dimeric species in equilibrium, oligomeric variants that either promote (monomer) or halt (dimer) chemotaxis were used to dissect the mechanisms interrupting carcinoma metastasis. Monomeric CXCL12 mobilized intracellular calcium, inhibited cAMP signaling, recruited β-arrestin-2, and stimulated filamentous-actin accumulation and cell migration. Dimeric CXCL12 activated G-protein-dependent calcium flux, adenylyl cyclase inhibition, and the rapid activation of ERK1/2, but only weakly, if at all, recruited arrestin, stimulated actin polymerization, or promoted chemotaxis. NMR analyses illustrated that CXCL12 monomers made specific contacts with CXCR4 that were lost following dimerization. Our results establish the potential for inhibiting CXCR4-mediated metastasis by administration of CXCL12. Chemokine-mediated migration and β-arrestin responses did not dictate the antitumor effect of CXCL12. We conclude that cellular migration is tightly regulated by selective CXCR4 signaling evoked by unique interactions with distinct ligand quaternary structures.
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Saulnier N, Zocco MA, Di Caro S, Gasbarrini G, Gasbarrini A. Probiotics and small bowel mucosa: Molecular aspects of their interactions. GENES AND NUTRITION 2011; 1:107-15. [PMID: 18850204 DOI: 10.1007/bf02829952] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/20/2006] [Accepted: 06/30/2006] [Indexed: 12/25/2022]
Abstract
Probiotics are described as "friendly bacteria" that could improve the intestine defense by interacting with the resident microflora. There is a large body of evidence suggesting that consumption of functional food containing probiotics exerts positive effects on human health. Several clinical trials have highlighted the efficiency of probiotics in the prevention and treatment of different gastrointestinal disorders including the prevention of antibiotic associated diarrhea, the remission in patients with inflammatory bowel disease, beneficial effects against Helicobacter pylori infection, positive effects in patients affected by allergies and atopic diseases. The clinical benefits of probiotics use are mainly attributed to their antimicrobial substances production and their positive interactions with the enterocytes to reinforce the intestinal epithelial barrier. Moreover, there is evidence suggesting that probiotics stimulate both specific and non-specific host immune responses. Recently, have been published some experiments performed with the DNA microarray technology which provided a global gene screening of the complex bacteria-host interplay. Nevertheless, the molecular mechanisms by which probiotics enhance the intestinal host defense are still not completely elucidated. Here, we review the experiments and clinical studies to date on the complex mechanisms regulating the communication between probiotics and their hosts.
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Affiliation(s)
- N Saulnier
- Department of Gastroenterology, Catholic University of Rome, Largo Gemelli 1, 00168, Rome, Italy
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Zimmerman NP, Vongsa RA, Faherty SL, Salzman NH, Dwinell MB. Targeted intestinal epithelial deletion of the chemokine receptor CXCR4 reveals important roles for extracellular-regulated kinase-1/2 in restitution. J Transl Med 2011; 91:1040-55. [PMID: 21537329 PMCID: PMC3167207 DOI: 10.1038/labinvest.2011.77] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023] Open
Abstract
Barrier defects and/or alterations in the ability of the gut epithelium to repair itself are critical etiological mechanisms of gastrointestinal disease. Our ongoing studies indicate that the chemokine receptor CXCR4 and its cognate ligand CXCL12 regulate intestinal-epithelial barrier maturation and restitution in cell culture models. Gene-deficient mice lacking CXCR4 expression specifically by the cells of the intestinal epithelium were used to test the hypothesis that CXCR4 regulates mucosal barrier integrity in vivo. Epithelial expression of CXCR4 was assessed by RT-PCR, Southern blot, immunoblot and immunohistochemistry. In vivo wounding assays were performed by addition of 3% dextran sodium sulfate (DSS) in drinking water for 5 days. Intestinal damage and DAI scores were assessed by histological examination. Extracellular-regulated kinase (ERK) phosphorylation was assessed in vivo by immunoblot and immunofluorescence. CXCR4 knockdown cells were established using a lentiviral approach and ERK phosphorylation was assessed. Consistent with targeted roles in restitution, epithelium from patients with inflammatory bowel disease indicated that CXCR4 and CXCL12 expression was stable throughout the human colonic epithelium. Conditional CXCR4-deficient mice developed normally, with little phenotypic differences in epithelial morphology, proliferation or migration. Re-epithelialization was absent in CXCR4 conditional knockout mice following acute DSS-induced inflammation. In contrast, heterozygous CXCR4-depleted mice displayed significant improvement in epithelial ulcer healing in acute and chronic inflammation. Mucosal injury repair was correlated with ERK1/2 activity and localization along the crypt-villus axis, with heterozygous mice characterized by increased ERK1/2 activation. Lentiviral depletion of CXCR4 in IEC-6 cells similarly altered ERK1/2 activity and prevented chemokine-stimulated migration. Taken together, these data indicate that chemokine receptors participate in epithelial barrier responses through coordination of the ERK1/2 signaling pathway.
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Affiliation(s)
- Noah P. Zimmerman
- Department of Microbiology and Molecular Genetics, 8701 Watertown Plank Road, Milwaukee, WI 53226
| | - Rebecca A. Vongsa
- Department of Microbiology and Molecular Genetics, 8701 Watertown Plank Road, Milwaukee, WI 53226
| | - Sheena L. Faherty
- Department of Microbiology and Molecular Genetics, 8701 Watertown Plank Road, Milwaukee, WI 53226
| | - Nita H. Salzman
- Department of Pediatrics Medical College of Wisconsin, 8701 Watertown Plank Road, Milwaukee, WI 53226
| | - Michael B. Dwinell
- Department of Microbiology and Molecular Genetics, 8701 Watertown Plank Road, Milwaukee, WI 53226,Address Correspondence: Michael B. Dwinell, Ph.D., Department of Microbiology and Molecular Genetics, Medical College of Wisconsin, 8701 Watertown Plank Road, Milwaukee, WI 53226, Phone: (414) 955-7427 / FAX: (414) 955-6535,
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Werner L, Elad H, Brazowski E, Tulchinsky H, Vigodman S, Kopylov U, Halpern Z, Guzner-Gur H, Dotan I. Reciprocal regulation of CXCR4 and CXCR7 in intestinal mucosal homeostasis and inflammatory bowel disease. J Leukoc Biol 2011; 90:583-90. [PMID: 21628333 DOI: 10.1189/jlb.0111101] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023] Open
Abstract
IBDs are characterized by increased influx of immune cells to the mucosa of genetically susceptible persons. Cellular migration to injury sites is mediated by chemokines. CXCL12 is a ubiquitous, constitutive chemokine that participates in stem cell proliferation and migration and mediates T lymphocyte migration to inflamed tissues. We have recently reported that CXCL12 and its receptor, CXCR4, are expressed in normal and more prominently, inflamed human intestinal mucosa. However, the interactions and roles of CXCL12 and its receptors, CXCR4 and the recently discovered CXCR7, in intestinal inflammation have not been defined. In the present study, we further dissected the effects of CXCL12 on lymphocytes in intestinal homeostasis and inflammation and delineated the interplay between CXCL12 and its receptors CXCR4 and CXCR7. To that end, fresh mononuclear cells were isolated from mucosa and PB of healthy or IBD patients. Phenotypical and functional assays were conducted using flow cytometry, Transwell migration chambers, and ELISA. The data show that CXCL12-mediated migration of T cells is CXCR4- but not CXCR7-dependent. T cell activation reciprocally regulates CXCR7 and CXCR4 expression and migratory capacity. IBD PBTs expressed more CXCR7 than normal PBTs. Finally, T cells attracted by CXCL12 are mostly of a memory phenotype. In conclusion, the present study suggests that the interplay between CXCL12 and its receptors affects homeostasis and inflammation in the intestinal mucosa.
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Affiliation(s)
- Lael Werner
- Department of Gastroenterology and Liver Diseases, Tel Aviv Sourasky Medical Center, Tel Aviv, Israel
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Diegelmann J, Seiderer J, Niess JH, Haller D, Göke B, Reinecker HC, Brand S. Expression and regulation of the chemokine CXCL16 in Crohn's disease and models of intestinal inflammation. Inflamm Bowel Dis 2010; 16:1871-81. [PMID: 20848509 PMCID: PMC2981128 DOI: 10.1002/ibd.21306] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
BACKGROUND CXCL16 mediates adhesion and phagocytosis of both Gram-negative and Gram-positive bacteria and is a strong chemoattractant for CXCR6+ T cells. In this study, we determined the so far unknown expression and signal transduction of the novel CXCL16-CXCR6 chemokine-ligand receptor system in intestinal inflammation in vivo and in vitro. METHODS CXCL16 mRNA was measured by quantitative PCR in human colonic biopsies of patients with Crohn's disease (CD) as well as in the TNFΔARE mouse model of ileitis and in murine cytomegalovirus (MCMV)-induced colitis. CXCL16 serum levels were analyzed by ELISA. CXCL16-induced signal transduction was analyzed in intestinal epithelial cells with phospho-specific antibodies for mitogen-activated protein (MAP) kinases and Akt. RESULTS We found an inverse expression pattern of CXCL16 and CXCR6, with highest CXCL16 mRNA expression in the proximal murine small intestine and the highest CXCR6 mRNA expression in the distal colon. CXCL16 and CXCR6 mRNA were expressed in colorectal cancer (CRC)-derived intestinal epithelial cell (IEC) lines. CRC-expressed CXCR6 was functional, as demonstrated by CXCL16-induced MAP kinase and Akt activation. Intestinal CXCL16 expression was elevated in the TNFΔARE mouse model of ileitis and in MCMV-induced colitis (P < 0.05) and in the sera and colons of patients with CD (P < 0.05), where its expression correlated highly with CXCR6 and IL-8 levels (r = 0.85 and 0.89, respectively). CONCLUSIONS CRC-derived IECs express the functional CXCL16 receptor CXCR6. CXCL16 mRNA and protein expression is up-regulated in intestinal inflammation in vitro and in CD patients, suggesting an important role for this chemokine in intestinal inflammation.
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Affiliation(s)
- Julia Diegelmann
- Department of Internal Medicine II - Grosshadern, University of Munich, Germany
| | - Julia Seiderer
- Department of Internal Medicine II - Grosshadern, University of Munich, Germany
| | | | - Dirk Haller
- Nutrition and Food Research Center, Experimental Nutritional Medicine, Technical University Freising-Weihenstephan, Germany
| | - Burkhard Göke
- Department of Internal Medicine II - Grosshadern, University of Munich, Germany
| | - Hans-Christian Reinecker
- Gastrointestinal Unit and Center for the Study of Inflammatory Bowel Disease, Department of Medicine, Massachusetts General Hospital and Harvard Medical School, Boston, MA, U.S.A
| | - Stephan Brand
- Department of Internal Medicine II - Grosshadern, University of Munich, Germany,Corresponding author: Stephan Brand, M.D., Department of Medicine II, University-Hospital Munich-Grosshadern, University of Munich, Marchioninistr. 15, D-81377 Munich, Germany, Tel. + 49-89-7095 2295, Fax. + 49-89-7095 5291,
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Drury LJ, Wendt MK, Dwinell MB. CXCL12 chemokine expression and secretion regulates colorectal carcinoma cell anoikis through Bim-mediated intrinsic apoptosis. PLoS One 2010; 5:e12895. [PMID: 20877573 PMCID: PMC2943927 DOI: 10.1371/journal.pone.0012895] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2010] [Accepted: 08/24/2010] [Indexed: 12/15/2022] Open
Abstract
Background Resistance to anoikis, apoptosis triggered by a loss of cellular adhesion to the underlying extracellular matrix, is a hallmark of metastatic cancer. Previously we have shown re-establishment of CXCL12 expression in colorectal carcinoma cells inhibits metastasis by enhancing anoikis sensitivity. The objective of these studies was to define the signaling mechanisms regulating CXCL12-mediated anoikis. Methodology/Principal Findings Adhesion, examined by crystal violet staining, immunofluorescence microscopy, and immunoblot analysis indicated decreased focal adhesion signaling corresponding with loss of adhesion in cells constitutively simulated by CXCL12. Loss of adhesion was inhibited by pertussis toxin treatment, indicating CXCL12 regulating anoikis through Gαi-protein coupled receptors. Non-adherent HCT116 and HT29 colorectal carcinoma cells expressing CXCL12 exhibited enhanced anoikis sensitivity by propidium iodide staining, caspase activity assays, and immunoblot compared to GFP control cells. CXCL12 producing carcinomas cultured on poly-HEMA displayed heightened Bim and loss of Mcl-1 and Bcl-2 preceding cytochrome c release, and caspase-9 activation. RNAi knockdown of Bim reversed anoikis sensitivity of CXCL12-expressing cells and fostered increased soft-agar foci formation and hepatic tumors in an orthotopic mouse model of metastasis. Conclusions/Significance These data indicate CXCL12 provides a barrier to metastasis by increasing anoikis via activation of a Bim-mediated intrinsic apoptotic pathway. These results underscore the importance of retaining CXCL12 expression to sensitize colorectal carcinomas to anoikis and minimize tumor progression.
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Affiliation(s)
- Luke J. Drury
- Department of Microbiology and Molecular Genetics, Medical College of Wisconsin, Milwaukee, Wisconsin, United States of America
| | - Michael K. Wendt
- Department of Microbiology and Molecular Genetics, Medical College of Wisconsin, Milwaukee, Wisconsin, United States of America
| | - Michael B. Dwinell
- Department of Microbiology and Molecular Genetics, Medical College of Wisconsin, Milwaukee, Wisconsin, United States of America
- * E-mail:
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Agle KA, Vongsa RA, Dwinell MB. Calcium mobilization triggered by the chemokine CXCL12 regulates migration in wounded intestinal epithelial monolayers. J Biol Chem 2010; 285:16066-75. [PMID: 20348095 PMCID: PMC2871475 DOI: 10.1074/jbc.m109.061416] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2009] [Revised: 03/26/2010] [Indexed: 12/26/2022] Open
Abstract
Restitution of intestinal epithelial barrier damage involves the coordinated remodeling of focal adhesions in actively migrating enterocytes. Defining the extracellular mediators and the intracellular signaling pathways regulating those dynamic processes is a key step in developing restitution-targeted therapies. Previously we have determined that activation of the chemokine receptor CXCR4 by the cognate ligand CXCL12 enhances intestinal epithelial restitution through reorganization of the actin cytoskeleton. The aim of these studies was to investigate the role of calcium effectors in CXCL12-mediated restitution. CXCL12 stimulated release of intracellular calcium in a dose-dependent manner. Inhibition of intracellular calcium flux impaired CXCL12-mediated migration of IEC-6 and CaCo2 cells. Pharmacological blockade and specific shRNA depletion of the phospholipase-C (PLCbeta3) isoform attenuated CXCL12-enhanced migration, linking receptor activation with intracellular calcium flux. Immunoblot analyses demonstrated CXCL12 activated the calcium-regulated focal adhesion protein proline-rich tyrosine kinase-2 (Pyk2) and the effector proteins paxillin and p130(Cas). Interruption of Pyk2 signaling potently blocked CXCL12-induced wound closure. CXCL12-stimulated epithelial cell migration was enhanced on laminin and abrogated by intracellular calcium chelation. These results suggest CXCL12 regulates restitution through calcium-activated Pyk2 localized to active focal adhesions. Calcium signaling pathways may therefore provide a novel avenue for enhancing barrier repair.
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Affiliation(s)
- Kimberle A. Agle
- From the Department of Microbiology and Molecular Genetics, Medical College of Wisconsin, Milwaukee, Wisconsin 53226
| | - Rebecca A. Vongsa
- From the Department of Microbiology and Molecular Genetics, Medical College of Wisconsin, Milwaukee, Wisconsin 53226
| | - Michael B. Dwinell
- From the Department of Microbiology and Molecular Genetics, Medical College of Wisconsin, Milwaukee, Wisconsin 53226
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Kritzik MR, Lago CU, Kayali AG, Arnaud-Dabernat S, Liu G, Zhang YQ, Hua H, Fox HS, Sarvetnick NE. Epithelial progenitor 1, a novel factor associated with epithelial cell growth and differentiation. Endocrine 2010; 37:312-21. [PMID: 20960269 PMCID: PMC4288843 DOI: 10.1007/s12020-009-9297-5] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/08/2009] [Accepted: 12/21/2009] [Indexed: 01/08/2023]
Abstract
The growth and renewal of epithelial tissue is a highly orchestrated and tightly regulated process occurring in different tissue types under a variety of circumstances. We have been studying the process of pancreatic regeneration in mice. We have identified a cell surface protein, named EP1, which is expressed on the duct epithelium during pancreatic regeneration. Whereas it is not detected in the pancreas of normal mice, it is found in the intestinal epithelium of normal adult mice, as well as during pancreatic repair following cerulein-induced destruction of the acinar tissue. The distinctive situations in which EP1 is expressed, all of which share in common epithelial cell growth in the gastrointestinal tract, suggest that EP1 is involved in the growth and renewal of epithelial tissues in both the intestine and the pancreas.
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Affiliation(s)
- Marcie R. Kritzik
- Department of Immunology, The Scripps Research Institute, La Jolla, CA 92037, USA
- Department of Surgery, Leid Transplant Center, University of Nebraska Medical Center, Omaha, NE 68198, USA
| | - Cory U. Lago
- Department of Immunology, The Scripps Research Institute, La Jolla, CA 92037, USA
| | - Ayse G. Kayali
- Department of Immunology, The Scripps Research Institute, La Jolla, CA 92037, USA
| | | | - Guoxun Liu
- Department of Immunology, The Scripps Research Institute, La Jolla, CA 92037, USA
| | - You-Qing Zhang
- Department of Immunology, The Scripps Research Institute, La Jolla, CA 92037, USA
| | - Hong Hua
- Department of Immunology, The Scripps Research Institute, La Jolla, CA 92037, USA
| | - Howard S. Fox
- Molecular and Integrative Neuroscience Department, The Scripps Research Institute, La Jolla, CA 92037, USA
- Department of Pharmacology and Experimental Neuroscience, Leid Transplant Center, University of Nebraska Medical Center, Omaha, NE 68198, USA
| | - Nora E. Sarvetnick
- Department of Immunology, The Scripps Research Institute, La Jolla, CA 92037, USA
- Department of Surgery, Leid Transplant Center, University of Nebraska Medical Center, Omaha, NE 68198, USA
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Dotan I, Werner L, Vigodman S, Weiss S, Brazowski E, Maharshak N, Chen O, Tulchinsky H, Halpern Z, Guzner-Gur H. CXCL12 is a constitutive and inflammatory chemokine in the intestinal immune system. Inflamm Bowel Dis 2010; 16:583-92. [PMID: 19774645 DOI: 10.1002/ibd.21106] [Citation(s) in RCA: 92] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
BACKGROUND Inflammatory bowel disease (IBD) is characterized by increased lymphocytic infiltrate to the lamina propria (LP) and upregulation of inflammatory chemokines and receptors. CXCL12 is a constitutive chemokine involved in lung, brain, and joint inflammation. We hypothesized that CXCL12 and its receptor, CXCR4, would have a constitutive and inflammatory role in the gut. METHODS Intestinal epithelial cells (IECs) and T lymphocytes were isolated from intestinal mucosa of IBD and control patients undergoing bowel resection. Autologous T cells were isolated from peripheral blood (PB). CXCL12 and CXCR4 expression by IECs was assessed by polymerase chain reaction and immunohistochemistry, lymphocyte phenotype by flow cytometry, and migration by Transwells. RESULTS IECs expressed CXCL12 and expression was increased and more diffuse in IBD compared to normal crypts (ulcerative colitis [UC] > Crohn's disease [CD], inflamed > noninflamed). CXCR4 was expressed by IECs, LP T cells (LPTs), and PB T cells (PBTs), and CXCR4+ cells were increased in IBD LP in situ. PBTs and LPTs from all patients had a high and comparable migration toward CXCL12 (P < 0.0001 and P < 0.05 vs. medium, respectively). Migration toward IBD-IEC-derived supernatant was significantly higher compared to normal. Antibodies against CXCR4 and CXCL12 blocked migration. CONCLUSIONS CXCL12 is expressed by normal IECs and upregulated and differentially distributed in IBD IECs. CXCR4 is expressed by IECs and LPTs, and CXCR4+ cells are significantly increased in IBD LP. CXCL12 is chemotactic for both PBTs and LPTs. Thus, CXCL12 and CXCR4 have a constitutive and inflammatory role in the intestinal mucosa and their selective therapeutic manipulation may be considered in IBD management.
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Affiliation(s)
- Iris Dotan
- IBD Center, Department of Gastroenterology and Liver Diseases, Tel-Aviv University, Tel-Aviv, Israel.
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Abstract
It has become increasingly evident that the study of DNA is inadequate to explain many, if not most, aspects of the development and progression of neoplastic lesions from pre-invasive lesions to metastasis. Thus, the term "genetic" can no longer refer to just the study of the genome. Much of the action in genetic research now shifts to the methods by which the pre-mRNA from one gene is processed to yield multiple different proteins, different quantities of the same protein as well as other forms of regulating RNA. Thus, the age of post-transcriptional processing and epigenetic control of the transfer of information from the genome has arrived. The mechanisms of post-transcriptional processing and epigenetic control that must be characterized in greater detail including alternate splicing, regulation of mRNA degradation, RNA regulatory factors including those factors which extensively edit mRNAs, control of translation, and control of protein stability and degradation. This chapter reviews many of the processes that control information from the genome to proteins and how these factors lead from less than 40,000 genes to more than an order of magnitude increase more proteins which actually control the phenotypes of cells - normal or neoplastic. It is usually the products of genes (e.g., mRNA, microRNA and proteins) that are the molecular markers that will control translational research and ultimately, individualized (personal) medical approaches to disease. This chapter emphasizes how the process of neoplasia "hijacks" the normal processes of cellular operations, especially those processes that are important in the normal development of the organisms - including proliferation, cellular death, angiogenesis, cellular mobility and invasion, and immunoregulation to ensure neoplastic development, survival and progression. This chapter reviews the wide range of processes controlling the information that flows from the genome to proteins and emphasizes how molecular steps in pure processes can be used as biomarkers to study prevention, treatment and/or management of diseases.
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Affiliation(s)
- Sudhir Srivastava
- National Cancer Institute, National Institutes of Health, Bethesda MD, USA.
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Vongsa RA, Zimmerman NP, Dwinell MB. CCR6 regulation of the actin cytoskeleton orchestrates human beta defensin-2- and CCL20-mediated restitution of colonic epithelial cells. J Biol Chem 2009; 284:10034-45. [PMID: 19233848 DOI: 10.1074/jbc.m805289200] [Citation(s) in RCA: 63] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023] Open
Abstract
Intestinal inflammation is exacerbated by defects in the epithelial barrier and subsequent infiltration of microbes and toxins into the underlying mucosa. Production of chemokines and antimicrobial peptides by an intact epithelium provide the first line of defense against invading organisms. In addition to its antimicrobial actions, human beta defensin-2 (HBD2) may also stimulate the migration of dendritic cells through binding the chemokine receptor CCR6. As human colonic epithelium expresses CCR6, we investigated the potential of HBD2 to stimulate intestinal epithelial migration. Using polarized human intestinal Caco2 and T84 cells and non-transformed IEC6 cells, HBD2 was equipotent to CCL20 in stimulating migration. Neutralizing antibodies confirmed HBD2 and CCL20 engagement to CCR6 were sufficient to induce epithelial cell migration. Consistent with restitution, motogenic concentrations of HBD2 and CCL20 did not induce proliferation. Stimulation with those CCR6 ligands leads to calcium mobilization and elevated active RhoA, phosphorylated myosin light chain, and F-actin accumulation. HBD2 and CCL20 were unable to stimulate migration in the presence of either Rho-kinase or phosphoinositide 3-kinase inhibitors or an intracellular calcium chelator. Together, these data indicate that the canonical wound healing regulatory pathway, along with calcium mobilization, regulates CCR6-directed epithelial cell migration. These findings expand the mechanistic role for chemokines and HBD2 in mucosal inflammation to include immunocyte trafficking and killing of microbes with the concomitant activation of restitutive migration and barrier repair.
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Affiliation(s)
- Rebecca A Vongsa
- Department of Microbiology and Molecular Genetics, Medical College of Wisconsin, Milwaukee, Wisconsin 53226, USA
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Vera PL, Iczkowski KA, Wang X, Meyer-Siegler KL. Cyclophosphamide-induced cystitis increases bladder CXCR4 expression and CXCR4-macrophage migration inhibitory factor association. PLoS One 2008; 3:e3898. [PMID: 19066630 PMCID: PMC2588654 DOI: 10.1371/journal.pone.0003898] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2008] [Accepted: 11/15/2008] [Indexed: 12/12/2022] Open
Abstract
Background Macrophage migration inhibitory factor (MIF) is a pro-inflammatory cytokine involved in cystitis and a non-cognate ligand of the chemokine receptor CXCR4 in vitro. We studied whether CXCR4-MIF associations occur in rat bladder and the effect of experimental cystitis. Methods and Findings Twenty male rats received saline or cyclophosphamide (40 mg/kg; i.p.; every 3rd day) to induce persistent cystitis. After eight days, urine was collected and bladders excised under anesthesia. Bladder CXCR4 and CXCR4-MIF co-localization were examined with immunhistochemistry. ELISA determined MIF and stromal derived factor-1 (SDF-1; cognate ligand for CXCR4) levels. Bladder CXCR4 expression (real-time RTC-PCR) and protein levels (Western blotting) were examined. Co-immunoprecipitations studied MIF-CXCR4 associations.Urothelial basal and intermediate (but not superficial) cells in saline-treated rats contained CXCR4, co-localized with MIF. Cyclophosphamide treatment caused: 1) significant redistribution of CXCR4 immunostaining to all urothelial layers (especially apical surface of superficial cells) and increased bladder CXCR4 expression; 2) increased urine MIF with decreased bladder MIF; 3) increased bladder SDF-1; 4) increased CXCR4-MIF associations. Conclusions These data demonstrate CXCR4-MIF associations occur in vivo in rat bladder and increase in experimental cystitis. Thus, CXCR4 represents an alternative pathway for MIF-mediated signal transduction during bladder inflammation. In the bladder, MIF may compete with SDF-1 (cognate ligand) to activate signal transduction mediated by CXCR4.
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Affiliation(s)
- Pedro L Vera
- Bay Pines VA Healthcare System, Research & Development (151), Bay Pines, Florida, USA.
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Wendt MK, Drury LJ, Vongsa RA, Dwinell MB. Constitutive CXCL12 expression induces anoikis in colorectal carcinoma cells. Gastroenterology 2008; 135:508-17. [PMID: 18558091 PMCID: PMC2583344 DOI: 10.1053/j.gastro.2008.05.033] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/18/2007] [Revised: 04/29/2008] [Accepted: 05/08/2008] [Indexed: 01/05/2023]
Abstract
BACKGROUND & AIMS CXCL12 and CXCR4 signaling plays critical roles in development, homeostasis, and tumor metastasis. Previously, we have shown that epigenetic silencing of CXCL12 in colorectal and mammary carcinomas promotes metastasis. Anoikis is an essential process of colonic epithelial turnover and limits the metastatic progression of carcinoma. We sought to determine the role for anoikis in limiting tumor metastasis following reexpression of CXCL12 in human colorectal carcinoma cells. METHODS Tumor formation and metastasis of colonic carcinoma cells was monitored using in vivo bioluminescence imaging. Anoikis was defined by using caspase-3/7, focal adhesion kinase (FAK) and p130Cas cleavage, DNA fragmentation, and cell survival assays. Phosphorylation of extracellular-regulated kinase-1/2 (ERK1/2) was monitored by immunoblot and immunohistochemistry, and activity was inhibited by using U0126. RESULTS Constitutive expression of CXCL12 in human colorectal carcinoma cells reduced orthotopic tumor formation and inhibited metastasis in severe combined immunodeficient mice. Further, CXCL12 expression induced apoptosis specifically in nonadherent colorectal carcinoma cells. Apoptotic cell death was preceded by hypophosphorylation and cleavage of FAK and p130Cas, leading to increased cellular detachment in culture, and depended on alterations in the extracellular matrix. Similar to in vivo colonic epithelium, CXCL12-induced anoikis of carcinoma cells depended on basal ERK1/2 activation. CONCLUSIONS These data significantly expand the current paradigm of chemokine signaling in carcinogenesis by showing that endogenous CXCL12, in marked contrast to exogenous ligand, inhibits tumor metastasis through increased anoikis. Altered ERK1/2 signaling provides a mechanism for the dichotomy between the physiologic and pathophysiologic roles of CXCL12-CXCR4 signaling in the intestinal epithelium.
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Affiliation(s)
- Michael K. Wendt
- Department of Microbiology and Molecular Genetics and the Cancer Center, Medical College of Wisconsin
| | - Luke J. Drury
- Department of Microbiology and Molecular Genetics and the Cancer Center, Medical College of Wisconsin
| | - Rebecca A. Vongsa
- Department of Microbiology and Molecular Genetics and the Cancer Center, Medical College of Wisconsin
| | - Michael B. Dwinell
- Department of Microbiology and Molecular Genetics and the Cancer Center, Medical College of Wisconsin,Corresponding Author: Michael B. Dwinell, Ph.D., Department of Microbiology and Molecular Genetics, Cancer Center, Medical College of Wisconsin, 8701 Watertown Plank Road, Milwaukee WI 53226-0509, Phone: 414-456-4727 / Fax: 414-456-6535,
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