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Gao Z, Sun L, Dai K, Du Y, Wu S, Bao W. Effects of mutations in porcine miRNA-215 precursor sequences on miRNA-215 regulatory function. Gene 2019; 701:131-138. [PMID: 30905811 DOI: 10.1016/j.gene.2019.03.044] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2018] [Revised: 03/12/2019] [Accepted: 03/20/2019] [Indexed: 01/21/2023]
Abstract
MicroRNAs (miRNAs) play an important role in animal growth and disease development, and sequence variation in microRNAs can alter their functions. Herein, we explored the effects of mutations in the miRNA-215 precursor sequence on the miRNA-215 regulatory network and resistance to Escherichia coli (E. coli). Polymerase chain reaction-single strand conformation polymorphism (PCR-SSCP) was used to detect sequence variations in Sutai and Meishan pigs. The miR-192 precursor sequence was not mutated, but the miR-215 precursor included an AT insertion mutation at position 6 (start from the first base of the miR-215 precursor) and a C/T mutation at position 43. Wild-type (WT) and mutant miR-215 precursor expression vectors were constructed to investigate the effects of sequence variation on expression of miR-215 and its target genes DLG5 and ALCAM, cytokine levels and E. coli adhesion. Compared with the WT control group, cells harbouring the C/T mutant vector displayed reduced miR-215 expression, increased target gene expression, elevated cytokine levels and rising E. coli adhesion, whereas cells harbouring the AT insertion mutant vector were not significantly changed. The sequence variation in the miRNA-215 precursor may affect the miRNA-215 regulatory network, and alter the stability of intestinal epithelial cells (IPEC-J2 cells) and resistance to E. coli. Our findings provide guidance for future research on the regulatory mechanisms of miR-215 in porcine resistance to E. coli F18, and identifying effective genetic markers against this organism.
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Affiliation(s)
- Zhongcheng Gao
- Key Laboratory for Animal Genetics, Breeding, Reproduction and Molecular Design, College of Animal Science and Technology, Yangzhou University, Yangzhou 225009, China
| | - Li Sun
- Key Laboratory for Animal Genetics, Breeding, Reproduction and Molecular Design, College of Animal Science and Technology, Yangzhou University, Yangzhou 225009, China
| | - Kaiyu Dai
- Key Laboratory for Animal Genetics, Breeding, Reproduction and Molecular Design, College of Animal Science and Technology, Yangzhou University, Yangzhou 225009, China
| | - Yulu Du
- Key Laboratory for Animal Genetics, Breeding, Reproduction and Molecular Design, College of Animal Science and Technology, Yangzhou University, Yangzhou 225009, China
| | - Shenglong Wu
- Key Laboratory for Animal Genetics, Breeding, Reproduction and Molecular Design, College of Animal Science and Technology, Yangzhou University, Yangzhou 225009, China; Joint International Research Laboratory of Agriculture & Agri-Product Safety, Yangzhou University, Jiangsu, Yangzhou, 225009, China
| | - Wenbin Bao
- Key Laboratory for Animal Genetics, Breeding, Reproduction and Molecular Design, College of Animal Science and Technology, Yangzhou University, Yangzhou 225009, China; Joint International Research Laboratory of Agriculture & Agri-Product Safety, Yangzhou University, Jiangsu, Yangzhou, 225009, China.
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Modulation of cell adhesion and migration through regulation of the immunoglobulin superfamily member ALCAM/CD166. Clin Exp Metastasis 2019; 36:87-95. [PMID: 30778704 DOI: 10.1007/s10585-019-09957-2] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2018] [Accepted: 01/30/2019] [Indexed: 12/30/2022]
Abstract
In epithelial-derived cancers, altered regulation of cell-cell adhesion facilitates the disruption of tissue cohesion that is central to the progression to malignant disease. Although numerous intercellular adhesion molecules participate in epithelial adhesion, the immunoglobulin superfamily (IgSF) member activated leukocyte cell adhesion molecule (ALCAM), has emerged from multiple independent studies as a central contributor to tumor progression. ALCAM is an archetypal member of the IgSF with conventional organization of five Ig-like domains involved in homo- and heterotypic adhesions. Like many IgSF members, ALCAM is broadly expressed and involved in cellular adhesion across many cellular processes. While the redundancy of intercellular adhesion molecules (CAMs) could diminish the impact of any single CAM, consistent correlation between ALCAM expression and patient outcome for multiple cancers underscores its role in tumor progression. Unlike most oncogenes and tumor suppressors, ALCAM is neither mutated nor amplified or deleted. Experimental disruption of ALCAM-mediated adhesions implies that this IgSF member contributes to tumor progression through dynamic turnover of the protein at the cell surface. Since ALCAM is not frequently altered at the gene level, it appears to promote malignant behavior through regulation of its availability rather than its specific activity. These observations help explain its heterogeneous expression within malignant disease and the drastic changes in protein levels across tumor progression. To reveal how ALCAM contributes to tumor progression, we review regulation of its gene expression, alternative splicing, targeted proteolysis, binding partners, and surface shedding within the context of cancer. Studying ALCAM regulation has led to a novel understanding of the fine-tuning of cell adhesive state through the utilization of otherwise normal regulatory processes, which thereby enable tumor cell invasion and metastasis.
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Insight into the molecular mechanism of miR-192 regulating Escherichia coli resistance in piglets. Biosci Rep 2018; 38:BSR20171160. [PMID: 29363554 PMCID: PMC5821941 DOI: 10.1042/bsr20171160] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2017] [Revised: 12/31/2017] [Accepted: 01/23/2018] [Indexed: 11/21/2022] Open
Abstract
MicroRNAs (miRNAs) have important roles in many cellular processes, including cell proliferation, growth and development, and disease control. Previous study demonstrated that the expression of two highly homologous miRNAs (miR-192 and miR-215) was up-regulated in weaned piglets with Escherichia coli F18 infection. However, the potential molecular mechanism of miR-192 in regulating E. coli infection remains unclear in pigs. In the present study, we analyzed the relationship between level of miR-192 and degree of E. coli resistance using transcription activator-like effector nuclease (TALEN), in vitro bacterial adhesion assays, and target genes research. A TALEN expression vector that specifically recognizes the pig miR-192 was constructed and then monoclonal epithelial cells defective in miR-192 were established. We found that miR-192 knockout led to enhance the adhesion ability of the E. coli strains F18ab, F18ac and K88ac, meanwhile increase the expression of target genes (DLG5 and ALCAM) by qPCR and Western blotting analysis. The results suggested that miR-192 and its key target genes (DLG5 and ALCAM) could have a key role in E. coli infection. Based on our findings, we propose that further investigation of miR-192 function is likely to lead to insights into the molecular mechanisms of E. coli infection.
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Sulaj A, Kopf S, Gröne E, Gröne HJ, Hoffmann S, Schleicher E, Häring HU, Schwenger V, Herzig S, Fleming T, Nawroth PP, von Bauer R. ALCAM a novel biomarker in patients with type 2 diabetes mellitus complicated with diabetic nephropathy. J Diabetes Complications 2017; 31:1058-1065. [PMID: 28325697 DOI: 10.1016/j.jdiacomp.2017.01.002] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/30/2016] [Revised: 01/13/2017] [Accepted: 01/16/2017] [Indexed: 02/06/2023]
Abstract
BACKGROUND & AIM Activated leukocyte cell adhesion molecule (ALCAM/CD166) functions analogue to the receptor of advanced glycation end products, which has been implicated in the development of diabetic nephropathy (DN). We investigated the expression of ALCAM and its ligand S100B in patients with DN. METHODS A total of 34 non-diabetic patients, 29 patients with type 2 diabetes and normal albuminuria and 107 patients with type 2 diabetes complicated with DN were assessed for serum concentration of soluble ALCAM (sALCAM) by ELISA. Expression of ALCAM and S100B in kidney histology from patients with DN was determined by immunohistochemistry. Cell expression of ALCAM and S100B was analyzed through confocal immunofluorescence microscopy. RESULTS Serum concentration of sALCAM was increased in diabetic patients with DN compared to non-diabetic (59.85±14.99ng/ml vs. 126.88±66.45ng/ml, P<0.0001). Moreover sALCAM correlated positively with HbA1c (R=0.31, P<0.0001), as well as with the stages of chronic kidney disease and negatively correlated with eGFR (R=-0.20, P<0.05). In diabetic patients with normal albuminuria sALCAM was increased compared to patients with DN (126.88±66.45ng/ml vs. 197.50±37.17ng/ml, P<0.0001). In diabetic patients, ALCAM expression was significantly upregulated in both the glomeruli and tubules (P<0.001). ALCAM expression in the glomeruli correlated with presence of sclerosis (R=0.25, P<0.001) and localized mainly in the podocytes supporting the hypothesis that membrane bound ALCAM drives diabetic nephropathy and thus explaining sALCAM decrease in diabetic patients with DN. The expression of S100B was increased significantly in the glomeruli of diabetic patients (P<0.001), but not in the tubules. S100B was as well localized in the podocytes. CONCLUSIONS This study identifies for the first time ALCAM as a potential mediator in the late complications of diabetes in the kidney.
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Affiliation(s)
- Alba Sulaj
- Department of Medicine I and Clinical Chemistry, University of Heidelberg, INF 410, 69120 Heidelberg, Germany.
| | - Stefan Kopf
- Department of Medicine I and Clinical Chemistry, University of Heidelberg, INF 410, 69120 Heidelberg, Germany
| | - Elisabeth Gröne
- Division of Cellular and Molecular Pathology, German Cancer Research Center, INF 280, 69120 Heidelberg, Germany
| | - Hermann-Josef Gröne
- Division of Cellular and Molecular Pathology, German Cancer Research Center, INF 280, 69120 Heidelberg, Germany
| | - Sigrid Hoffmann
- Medical Research Center, Medical Faculty Mannheim, University of Heidelberg, Theodor-Kutzer Ufer 1-3, 68135 Mannheim, Germany
| | - Erwin Schleicher
- Department of Internal Medicine, University of Tübingen, 72074 Tübingen, Germany
| | - Hans-Ulrich Häring
- Department of Internal Medicine, University of Tübingen, 72074 Tübingen, Germany; German Center for Diabetes Research, 85764 Neuherberg, Germany
| | - Vedat Schwenger
- Department of Nephrology, University of Heidelberg, INF 410, 69120 Heidelberg, Germany
| | - Stephan Herzig
- Institute for Diabetes and Cancer IDC, Helmholtz Center Munich and Joint Heidelberg-IDC Translational, Diabetes Program, University of Heidelberg, INF 410, 69120 Heidelberg, Germany
| | - Thomas Fleming
- Department of Medicine I and Clinical Chemistry, University of Heidelberg, INF 410, 69120 Heidelberg, Germany; German Center for Diabetes Research, 85764 Neuherberg, Germany
| | - Peter P Nawroth
- Department of Medicine I and Clinical Chemistry, University of Heidelberg, INF 410, 69120 Heidelberg, Germany; German Center for Diabetes Research, 85764 Neuherberg, Germany; Institute for Diabetes and Cancer IDC, Helmholtz Center Munich and Joint Heidelberg-IDC Translational, Diabetes Program, University of Heidelberg, INF 410, 69120 Heidelberg, Germany
| | - Rüdiger von Bauer
- Department of Medicine I and Clinical Chemistry, University of Heidelberg, INF 410, 69120 Heidelberg, Germany
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Tan F, Mosunjac M, Adams AL, Adade B, Taye O, Hu Y, Rizzo M, Ofori-Acquah SF. Enhanced down-regulation of ALCAM/CD166 in African-American Breast Cancer. BMC Cancer 2014; 14:715. [PMID: 25255861 PMCID: PMC4190464 DOI: 10.1186/1471-2407-14-715] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2013] [Accepted: 09/22/2014] [Indexed: 12/31/2022] Open
Abstract
Background Variation in tumor biology in African-American (AA) and Caucasian (CAU) women with breast cancer is poorly defined. Activated leukocyte cell adhesion molecule (ALCAM) is a bad prognostic factor of breast cancer yet it has never being studied in the AA population. We tested the hypothesis that ALCAM expression would be markedly lower in cases of AA breast cancer when compared to CAU. Methods Cases of breast cancer among AA (n = 78) and CAU (n = 95) women were studied. Immunohistochemical staining was used to semi-quantitatively score ALCAM expression in tumor and adjacent non-tumor breast tissues. Clinico-pathological characteristics including histological type, histological grade, tumor size, lymph node metastasis, estrogen receptor (ER), progesterone receptor (PR), and HER2-neu status were abstracted, and their association with ALCAM expression tested. Results Univariate analysis revealed that the level of ALCAM expression at intercellular junctions of primary tumors correlates with histological grade (AA; p = 0.04, CUA; p = 0.02), ER status (AA; p = 0.0004, CAU; p = 0.0015), PR status (AA; p = 0.002, CUA p = 0.034) and triple-negative tumor status (AA; p = 0.0002, CAU; p = 0.0006,) in both ethnic groups. Multivariate analysis demonstrated that ethnicity contribute significantly to ALCAM expression after accounting for basal-like subtype, age, histological grade, tumor size, and lymph node status. Compared to CAU tumors, the AA are 4 times more likely to have low ALCAM expression (p = 0.003). Conclusions Markedly low expression of ALCAM at sites of cell-cell contact in primary breast cancer tumors regardless of differentiation, size and lymph node involvement may contribute to the more aggressive phenotype of breast cancer among AA women.
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Affiliation(s)
| | | | | | | | | | | | | | - Solomon F Ofori-Acquah
- Aflac Cancer Center and Blood Disorders Service, Department of Pediatrics, Emory University School of Medicine, 2015 Uppergate Drive, Atlanta, GA 30322, USA.
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Abstract
PURPOSE OF REVIEW Many surface antigens have been previously used to identify hematopoietic stem cells or cellular elements of the hematopoietic niche. However, to date, not a single surface marker has been identified as a common marker expressed on murine and human hematopoietic stem cells and on cells of the hematopoietic niche. Recently, a few laboratories, including ours, recognized the importance of CD166 as a functional marker on both stem cells and osteoblasts and have begun to characterize the role of CD166 in hematopoiesis. RECENT FINDINGS Expression of CD166 on hematopoietic cells and cells in the marrow microenvironment was first reported more than a decade ago. Lately, however, a more prominent role for CD166 in normal hematopoiesis and in cancer biology including metastasis began to emerge. This review will cover the significance of CD166 in identifying normal hematopoietic stem cells and cells of the hematopoietic niche and highlight how CD166-mediated homophilic interactions between both cell types may be critical for stem cell function. SUMMARY The conserved homology between murine and human CD166 and its involvement in metastasis provides an excellent bridge for translational investigations aimed at enhancing stem cell engraftment and clinical utility of stem cells and at using CD166 as a therapeutic target in cancer.
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Wagner M, Wiśniewski A, Bilińska M, Pokryszko-Dragan A, Nowak I, Kuśnierczyk P, Jasek M. ALCAM--novel multiple sclerosis locus interfering with HLA-DRB1*1501. J Neuroimmunol 2013; 258:71-6. [PMID: 23507476 DOI: 10.1016/j.jneuroim.2013.02.015] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2012] [Revised: 02/15/2013] [Accepted: 02/19/2013] [Indexed: 12/20/2022]
Abstract
Activated leukocyte cell adhesion molecule (ALCAM) is a molecule involved in leukocyte migration across the blood-brain barrier which is a key stage in multiple sclerosis (MS) pathogenesis. The present study is the first to report evidence of the association of rs6437585 ALCAM polymorphism with risk and progression of MS. Our investigation revealed that rs6437585CT individuals had higher risk of MS (OR=2.34; 95%CI=1.22-4.51; P=0.011) and over 2 years earlier age of onset (95%CI=0.16-4.41, P=0.036). Moreover, we demonstrated that two ALCAM polymorphisms, rs11559013 and rs34926152, although not associated with MS itself, modify HLA-DRB1*1501 effect. Results obtained from logistic regression analysis showed five-fold lower risk for MS for both rs11559013GA/HLA-DRB1*1501+ and rs34926152GT/HLA-DRB1*1501+ individuals. This observations may suggest protective role against MS for both rs11559013GA and rs34926152GT genotypes in HLA-DRB1*1501 positive individuals.
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Affiliation(s)
- Marta Wagner
- Department of Clinical Immunology, Ludwik Hirszfeld Institute of Immunology and Experimental Therapy, Polish Academy of Sciences, Wrocław, Poland.
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