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Gerber TS, Ridder DA, Schindeldecker M, Weinmann A, Duret D, Breuhahn K, Galle PR, Schirmacher P, Roth W, Lang H, Straub BK. Constitutive Occurrence of E:N-cadherin Heterodimers in Adherens Junctions of Hepatocytes and Derived Tumors. Cells 2022; 11:cells11162507. [PMID: 36010583 PMCID: PMC9406782 DOI: 10.3390/cells11162507] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2022] [Revised: 08/06/2022] [Accepted: 08/08/2022] [Indexed: 12/24/2022] Open
Abstract
Cell–cell junctions are pivotal for embryogenesis and tissue homeostasis but also play a major role in tumorigenesis, tumor invasion, and metastasis. E-cadherin (CDH1) and N-cadherin (CDH2) are two adherens junction’s transmembrane glycoproteins with tissue-specific expression patterns in epithelial and neural/mesenchymal cells. Aberrant expression has been implicated in the process of epithelial–mesenchymal transition (EMT) in malignant tumors. We could hitherto demonstrate cis-E:N-cadherin heterodimer in endoderm-derived cells. Using immunoprecipitation in cultured cells of the line PLC as well as in human hepatocellular carcinoma (HCC)-lysates, we isolated E-N-cadherin heterodimers in a complex with the plaque proteins α- and β-catenin, plakoglobin, and vinculin. In confocal laser scanning microscopy, E-cadherin co-localized with N-cadherin at the basolateral membrane of normal hepatocytes, hepatocellular adenoma (HCA), and in most cases of HCC. In addition, we analyzed E- and N-cadherin expression via immunohistochemistry in a large cohort of 868 HCCs from 570 patients, 25 HCA, and respective non-neoplastic liver tissue, and correlated our results with multiple prognostic markers. While E- or N-cadherin were similarly expressed in tumor sites with vascular invasion or HCC metastases, HCC with vascular encapsulated tumor clusters (VETC) displayed slightly reduced E-cadherin, and slightly increased N-cadherin expression. Analyzing The Cancer Genome Atlas patient cohort, we found that reduced mRNA levels of CDH1, but not CDH2 were significantly associated with unfavorable prognosis; however, in multivariate analysis, CDH1 did not correlate with prognosis. In summary, E- and N-cadherin are specific markers for hepatocytes and derived HCA and HCC. E:N-cadherin heterodimers are constitutively expressed in the hepatocytic lineage and only slightly altered in malignant progression, thereby not complying with the concept of EMT.
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Affiliation(s)
- Tiemo Sven Gerber
- Institute of Pathology, University Medical Center of the Johannes Gutenberg-University Mainz, 55131 Mainz, Germany
| | - Dirk Andreas Ridder
- Institute of Pathology, University Medical Center of the Johannes Gutenberg-University Mainz, 55131 Mainz, Germany
| | - Mario Schindeldecker
- Institute of Pathology, University Medical Center of the Johannes Gutenberg-University Mainz, 55131 Mainz, Germany
- Tissue Biobank, University Medical Center of the Johannes Gutenberg-University Mainz, 55131 Mainz, Germany
| | - Arndt Weinmann
- 1st Department of Internal Medicine, Gastroenterology and Hepatology, University Medical Center of the Johannes Gutenberg-University Mainz, 55131 Mainz, Germany
| | - Diane Duret
- Institute of Pathology, University Medical Center of the Johannes Gutenberg-University Mainz, 55131 Mainz, Germany
| | - Kai Breuhahn
- Institute of Pathology, University Clinic Heidelberg, 69120 Heidelberg, Germany
| | - Peter R. Galle
- 1st Department of Internal Medicine, Gastroenterology and Hepatology, University Medical Center of the Johannes Gutenberg-University Mainz, 55131 Mainz, Germany
| | - Peter Schirmacher
- Institute of Pathology, University Clinic Heidelberg, 69120 Heidelberg, Germany
| | - Wilfried Roth
- Institute of Pathology, University Medical Center of the Johannes Gutenberg-University Mainz, 55131 Mainz, Germany
| | - Hauke Lang
- Department of General, Visceral and Transplant Surgery, University Medical Center of the Johannes Gutenberg-University Mainz, 55131 Mainz, Germany
| | - Beate Katharina Straub
- Institute of Pathology, University Medical Center of the Johannes Gutenberg-University Mainz, 55131 Mainz, Germany
- Correspondence:
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Mukhopadhyay A, Das A, Mukherjee S, Rajput M, Gope A, Chaudhary A, Choudhury K, Barui A, Chatterjee J, Mukherjee R. Improved Mesenchymal Stem Cell Proliferation, Differentiation, Epithelial Transition, and Restrained Senescence on Hierarchically Patterned Porous Honey Silk Fibroin Scaffolds. ACS APPLIED BIO MATERIALS 2021; 4:4328-4344. [PMID: 35006845 DOI: 10.1021/acsabm.1c00115] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
We report a significant improvement of adipose-derived mesenchymal stem cells' (ADMSCs) biocompatibility and proliferation on hierarchically patterned porous honey-incorporated silk fibroin scaffolds fabricated using a combination of soft lithography and freeze-drying techniques. Parametric variations show enhanced surface roughness, swelling, and degradation rate with good pore interconnectivity, porosity, and mechanical strength for soft-lithographically fabricated biomimetic microdome arrays on the 2% honey silk fibroin scaffold (PHSF2) as compared to its other variants, which eventually made PHSF2 more comparable to the native environment required for stem cell adhesion and proliferation. PHSF2 also exhibits sustained honey release with remarkable antibacterial efficacy against methicillin-resistant Staphylococcus aureus (MRSA). Honey incorporation (biochemical cue) influences microdome structural features, that is, biophysical cues (height, width, and periodicity), which further allows ADMSCs pseudopods (filopodia) to grasp the microdomes for efficient cell-cell communication and cell-matrix interaction and regulates ADMSCs behavior by altering their cytoskeletal rearrangement and thereby increases the cellular spreading area and cell sheet formation. The synergistic effect of biochemical (honey) and biophysical (patterns) cues on ADMSCs studied by the nitro blue tetrazolium assay and DCFDA fluorescence spectroscopy reveals limited free radical generation within cells. Molecular expression studies show a decrease in p53 and p21 expressions validating ADMSCs senescence inhibition, which is further correlated with a decrease in cellular senescence-associated β galactosidase activity. We also show that an increase in CDH1 and CK19 molecular expressions along with an increase in SOX9, RUNX2, and PPARγ molecular expressions supported by PHSF2 justify the substrate's efficacy of underpinning mesenchymal to epithelial transition and multilineage trans-differentiation. This work highlights the fabrication of a naturally healing nutraceutical (honey)-embedded patterned porous stand-alone tool with the potential to be used as smart stem cells delivering regenerative healing implant.
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Affiliation(s)
- Anurup Mukhopadhyay
- Multimodal Imaging and Theranostics Laboratory, School of Medical Science and Technology, Indian Institute of Technology Kharagpur, Kharagpur, West Bengal 721302, India
| | - Ankita Das
- Centre for Healthcare Science and Technology, Indian Institute of Engineering Science and Technology, Shibpur, Howrah, West Bengal 711103, India
| | - Suranjana Mukherjee
- Multimodal Imaging and Theranostics Laboratory, School of Medical Science and Technology, Indian Institute of Technology Kharagpur, Kharagpur, West Bengal 721302, India
| | - Monika Rajput
- Multimodal Imaging and Theranostics Laboratory, School of Medical Science and Technology, Indian Institute of Technology Kharagpur, Kharagpur, West Bengal 721302, India.,Biomaterials and Tissue Engineering Laboratory, Department of Materials Engineering, Indian Institute of Science Bangalore, Bengaluru, Karnataka 560012, India
| | - Ayan Gope
- Multimodal Imaging and Theranostics Laboratory, School of Medical Science and Technology, Indian Institute of Technology Kharagpur, Kharagpur, West Bengal 721302, India
| | - Amrita Chaudhary
- Multimodal Imaging and Theranostics Laboratory, School of Medical Science and Technology, Indian Institute of Technology Kharagpur, Kharagpur, West Bengal 721302, India
| | - Kabita Choudhury
- Department of Microbiology, Nil Ratan Sircar Medical College and Hospital, Sealdah, Kolkata, West Bengal 700014, India
| | - Ananya Barui
- Centre for Healthcare Science and Technology, Indian Institute of Engineering Science and Technology, Shibpur, Howrah, West Bengal 711103, India
| | - Jyotirmoy Chatterjee
- Multimodal Imaging and Theranostics Laboratory, School of Medical Science and Technology, Indian Institute of Technology Kharagpur, Kharagpur, West Bengal 721302, India
| | - Rabibrata Mukherjee
- Instability and Soft Patterning Laboratory, Department of Chemical Engineering, Indian Institute of Technology Kharagpur, Kharagpur, West Bengal 721302, India
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Immunohistochemical Evaluation of p63, E-Cadherin, Collagen I and III Expression in Lower Limb Wound Healing under Honey. EVIDENCE-BASED COMPLEMENTARY AND ALTERNATIVE MEDICINE 2011; 2011:239864. [PMID: 21584268 PMCID: PMC3092180 DOI: 10.1155/2011/239864] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/08/2010] [Revised: 01/12/2011] [Accepted: 01/18/2011] [Indexed: 02/06/2023]
Abstract
Honey is recognized traditionally for its medicinal properties and also appreciated as a topical healing agent for infected and noninfected wounds. This study evaluates impact of honey-based occlusive dressing on nonhealing (nonresponding to conventional antibiotics) traumatic lower limb wounds (n = 34) through clinicopathological and immunohistochemical (e.g., expression of p63, E-cadherin, and Collagen I and III) evaluations to enrich the scientific validation. Clinical findings noted the nonadherence of honey dressing with remarkable chemical debridement and healing progression within 11–15 days of postintervention. Histopathologically, in comparison to preintervention biopsies, the postintervention tissues of wound peripheries demonstrated gradual normalization of epithelial and connective tissue features with significant changes in p63+ epithelial cell population, reappearance of membranous E-cadherin (P < .0001), and optimum deposition of collagen I and III (P < .0001). Thus, the present study for the first time reports the impact of honey on vital protein expressions in epithelial and connective tissues during repair of nonhealing lower limb wounds.
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Sharma S, Koh KSY, Collin C, Dave A, McMellon A, Sugiyama Y, McAvoy JW, Voss AK, Gécz J, Craig JE. NHS-A isoform of the NHS gene is a novel interactor of ZO-1. Exp Cell Res 2009; 315:2358-72. [DOI: 10.1016/j.yexcr.2009.05.008] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2008] [Revised: 04/09/2009] [Accepted: 05/08/2009] [Indexed: 10/20/2022]
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5
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Obara S, Nakata M, Takeshima H, Katagiri H, Asano T, Oka Y, Maruyama I, Kuratsu JI. Integrin-linked kinase (ILK) regulation of the cell viability in PTEN mutant glioblastoma and in vitro inhibition by the specific COX-2 inhibitor NS-398. Cancer Lett 2004; 208:115-22. [PMID: 15105053 DOI: 10.1016/j.canlet.2003.11.020] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2003] [Revised: 11/12/2003] [Accepted: 11/13/2003] [Indexed: 10/26/2022]
Abstract
We report the increased activity and expression of the ILK protein in human glioblastomas and demonstrate that ILK activity is regulated by PTEN. The transfection of wild type-PTEN into the glioblastoma cell line U-251 MG altered the localization of ILK in the cell membrane; transfection with PTEN down-regulated PKB/Akt-Ser-473 phosphorylation via the inhibition of ILK-signaling. Our results suggest that ILK is critical for the PTEN-sensitive regulation of PKB/Akt-dependent cell survival. The selective COX-2 inhibitor NS-398 was found capable of down-regulating ILK and PKB/Akt phosphorylation. Our data indicate that inhibition of ILK signaling may be beneficial in the treatment of PTEN-deficient glioblastoma.
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Affiliation(s)
- Soichi Obara
- Department of Physiology, Jichi Medical School, Minamikawachi, Kawachi, Tochigi 329-0498, Japan.
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Obara S, Nakata M, Takeshima H, Kuratsu JI, Maruyama I, Kitajima I. Inhibition of migration of human glioblastoma cells by cerivastatin in association with focal adhesion kinase (FAK). Cancer Lett 2002; 185:153-61. [PMID: 12169389 DOI: 10.1016/s0304-3835(02)00278-1] [Citation(s) in RCA: 36] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
To investigate the biological effect of cerivastatin on glioblastoma cells, we exposed them to various concentrations of cerivastatin. Cerivastatin exhibited dual effects on glioblastoma cells in a dose-dependent manner. Immunofluorescence microscopy showed disruption of actin stress fibers and focal adhesion plaques even at nanomolar concentrations. Matrigel assay demonstrated marked inhibition of glioblastoma cell invasion. Immunoblot analysis using a phosphospecific antibody against focal adhesion kinase (FAK) showed that inhibition of migration was associated with the down-regulation of tyrosine phosphorylation of FAK. Our data suggest that cerivastatin may be beneficial for combination therapy with conventional anti-cancer drugs by inhibiting the invasion of glioblastoma.
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Affiliation(s)
- Soichi Obara
- Department of Neurosurgery, Faculty of Medicine, Kagoshima University, 8-35-1 Sakuragaoka, 890-8520, Kagoshima, Japan.
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7
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Takahashi T, Higuchi M, Fukushi M, Oie M, Ito M, Fujii M. Homotypic cell-cell adhesion induced by human T cell leukemia virus type 1 tax protein in T cell lines. Virology 2002; 302:132-43. [PMID: 12429522 DOI: 10.1006/viro.2002.1629] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Cell-cell adhesion is involved in the processes of cell growth, activation and migration, and inflammation. T cells infected with human T cell leukemia virus type 1 (HTLV-1) exhibit a high degree of homotypic cell-cell adhesion in vitro. In this study, we investigated the involvement of the viral protein Tax in such process. Expression of Tax in an interleukin (IL)-2-dependent mouse T cell line (CTLL-2) increased homotypic cell-cell adhesion; however, less cell adhesion was induced by Tax than that observed in HTLV-1-infected T cell lines. Moreover, Tax induced cell-cell adhesion in a human T cell line, in which the expression of Tax is inducible. Microscopic examination also revealed Tax-induced morphologic changes, including rounding of CTLL-2 cells, increased cell volume, and increased nucleus size. Taken together, our results suggest that Tax induces cell-cell adhesion and morphologic changes in HTLV-1-infected cells. Tax may thus play a role in persistent HTLV-1 infection and the pathogenesis of associated disease.
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Affiliation(s)
- Toshiyuki Takahashi
- Division of Virology, Niigata University Graduate School of Medical and Dental Sciences, 1-757 Asahimachi-Dori, Niigata, 951-8510, Japan
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8
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Jiang MC, Liao CF, Lee PH. Aspirin inhibits matrix metalloproteinase-2 activity, increases E-cadherin production, and inhibits in vitro invasion of tumor cells. Biochem Biophys Res Commun 2001; 282:671-7. [PMID: 11401513 DOI: 10.1006/bbrc.2001.4637] [Citation(s) in RCA: 91] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Aspirin (acetylsalicylic acid) is a widely used anti-inflammatory drug. Recently, aspirin was shown to reduce the risk of development of cancer and mortality from it. Tumor metastasis is the most important cause of cancer death. The aim of the present study was to investigate if aspirin affects the invasion of cancer cells. Matrix metalloproteinases (MMPs) and cell adhesion molecules play important roles in the modulation of tumor invasion. Gelatin-based zymography assay showed that aspirin inhibited MMP-2 activity of SK-Hep-1 cancer cells. Matrigel-based chemoinvasion assay showed that aspirin inhibited in vitro invasion of SK-Hep-1 cancer cells. Aspirin treatment also increased the production of the cell adhesion molecule, E-cadherin, in Hep G2 cancer cells. Aspirin is a cyclooxygenase (COX) inhibitor. Treatment of cells with another COX inhibitor, sulindac, also inhibited MMP-2 activity and increased E-cadherin production of cells. These results indicate that aspirin can modulate both MMP-2 and E-cadherin production and therein may possess antimetastatic effect.
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Affiliation(s)
- M C Jiang
- Institute of Zoology, Academia Sinica, Taipei, 115, Taiwan
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9
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Yi T, Lee BH, Park RW, Kim IS. Transactivation of fibronectin promoter by HTLV-I Tax through NF-kappaB pathway. Biochem Biophys Res Commun 2000; 276:579-86. [PMID: 11027516 DOI: 10.1006/bbrc.2000.3517] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The facts that fibronectin (FN) mRNA is elevated in cells expressing human T cell leukemia virus type I (HTLV-I) Tax protein and that Tax is known to transactivate the cellular cAMP-response element (CRE) prompted us to examine whether Tax activates the FN promoter of which CRE is thought to play an important role. We showed that Tax transactivated the FN promoter in Jurkat cells. Deletion analyses showed that the response-element resides within the promoter region of -69 bp and that an NF-kappaB-binding site at -41 bp is involved in the Tax-activation of the FN promoter. Gel-shift assays showed that DNA-protein complexes binding to the NF-kappaB site, composed of NF-kappaB p50/p65, were induced on the NF-kappaB motif at -41 bp by Tax. Overexpression of NF-kappaB enhanced the Tax-activation of the FN promoter. Our study shows that the FN promoter is transactivated by Tax through the NF-kappaB pathway.
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Affiliation(s)
- T Yi
- Department of Biochemistry, School of Medicine, Kyungpook National University, 101 Dongin-dong, Jung-gu, Taegu, 700-422, Korea
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Kitajima I, Unoki K, Maruyama I. Phosphorothioate oligodeoxynucleotides inhibit basic fibroblast growth factor-induced angiogenesis in vitro and in vivo. ANTISENSE & NUCLEIC ACID DRUG DEVELOPMENT 1999; 9:233-9. [PMID: 10355829 DOI: 10.1089/oli.1.1999.9.233] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
Angiogenesis is regulated by heparin-binding growth factors, such as basic fibroblast growth factor (bFGF). We investigated the effects of phosphorothioate-mediated oligodeoxynucleotides (PS-ODN) on bFGF-induced angiogenesis. Because PS-ODN are polyanions, they can also bind many heparin-binding proteins. On a basement matrix using a Matrigel matrix, we observed <50% tube formation by human umbilical endothelial cells with 10 microM bFGF, vascular endothelial growth factor, or nuclear factor-kappaB (NF-kappaB) antisense and sense PS-ODN, while phosphodiester oligodeoxynucleotides (PO-ODNs) were not affected. The PS-ODN, but not the PO-ODN, inhibited the bFGF-induced rabbit corneal neovascularization. In albino rats, the NF-kappaB antisense PS-ODN showed a low rescue score for bFGF-dependent photoreceptor rescue because of their degradation by constant light exposure. However, antisense PS-ODN active against bFGF inhibited angiogenesis more strongly than did the antisense NF-kappaB PS-ODN. Because of the important role bFGF plays in angiogenesis, some PS-ODN may serve as potent antiangiogenic compounds that act through a combination of polyanionic phosphorothioate effects and a sequence-specific antisense mechanism.
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Affiliation(s)
- I Kitajima
- Department of Laboratory and Molecular Medicine, Kagoshima University, Faculty of Medicine, Japan
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11
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Arai M, Ohashi T, Tsukahara T, Murakami T, Hori T, Uchiyama T, Yamamoto N, Kannagi M, Fujii M. Human T-cell leukemia virus type 1 Tax protein induces the expression of lymphocyte chemoattractant SDF-1/PBSF. Virology 1998; 241:298-303. [PMID: 9499804 DOI: 10.1006/viro.1997.8968] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
We investigated the mechanism of lymphocyte infiltration into tissues infected with human T-cell leukemia virus type 1 (HTLV-1). The cytokine SDF-1/PBSF is a highly efficient chemoattractant for lymphocytes. Reverse transcription-PCR analysis showed that among various human T-cell lines, those infected with HTLV-1 selectively expressed the SDF-1 gene. Expression of the viral protein Tax in a human T-cell line induced the expression of the SDF-1 gene, indicating that the constitutive expression of SDF-1 in virus-infected cell lines is at least in part mediated by Tax. HTLV-1-infected T-cell lines also expressed CXCR-4, a receptor for SDF-1. Moreover, chemotaxis assay showed that a HTLV-1-infected cell line migrated toward synthetic SDF-1. Thus, HTLV-1-infected cells are themselves responders for SDF-1. Our results suggest that SDF-1 induced by Tax may alter the distribution of HTLV-1-infected cells in vivo; hence it may contribute to their infiltration into affected tissues in HTLV-1-associated inflammatory diseases.
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Affiliation(s)
- M Arai
- Department of Immunotherapeutics, Tokyo Medical and Dental University, Japan
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12
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Kitajima I, Hanyu N, Kawahara K, Soejima Y, Kubo T, Yamada R, Kaneda Y, Maruyama I. Ribozyme-based gene cleavage approach to chronic arthritis associated with human T cell leukemia virus type I: induction of apoptosis in synoviocytes by ablation of HTLV-I tax protein. ARTHRITIS AND RHEUMATISM 1997; 40:2118-27. [PMID: 9416848 DOI: 10.1002/art.1780401205] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
OBJECTIVE To develop gene therapy for patients with human T cell leukemia virus type I (HTLV-I)-associated arthropathy (HAAP), we investigated the effects of ribozyme-mediated cleavage of HTLV-I tax/rex messenger RNA (mRNA) on synovial overgrowth. METHODS We introduced 2 hammerhead ribozymes targeted against HTLV-I tax/rex mRNA into synovial cells obtained from patients with HAAP and from patients with HTLV-I-negative rheumatoid arthritis (RA) and examined the ribozyme-mediated ablation of Tax expression. Using standard methods, we also determined the cells' ability to stop proliferating and to undergo apoptosis. RESULTS The ribozymes successfully cleaved tax/rex mRNA in HAAP patient synoviocytes. Both tax mRNA expression and Tax protein synthesis were inhibited significantly, resulting in inhibition of synovial cell growth and induction of apoptosis. In contrast, synovial cells from RA patients were not affected. CONCLUSION In vitro results suggest that ribozyme-mediated gene therapy can inhibit the growth of HTLV-I-infected synovial cells, which is maintained by Tax protein, in HTLV-I-related diseases including HAAP.
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Affiliation(s)
- I Kitajima
- Kagoshima University, Kagoshima City, Japan
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13
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Kitajima I, Hanyu N, Soejima Y, Hirano R, Arahira S, Yamaoka S, Yamada R, Maruyama I, Kaneda Y. Efficient transfer of synthetic ribozymes into cells using hemagglutinating virus of Japan (HVJ)-cationic liposomes. Application for ribozymes that target human t-cell leukemia virus type I tax/rex mRNA. J Biol Chem 1997; 272:27099-106. [PMID: 9341150 DOI: 10.1074/jbc.272.43.27099] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023] Open
Abstract
We investigated the usefulness of ribozymes in inhibiting the expression of human T-cell leukemia virus type I (HTLV-I) gene. Two hammerhead ribozymes that were against HTLV-I rex (RR) and tax (TR) mRNA were synthesized. Both ribozymes were sequence-specific in the in vitro cleavage analysis of run-off transcripts from tax/rex cDNA. Intracellular activities of the ribozymes were studied in HTLV-I tax cDNA-transfected rat embryonic fibroblasts (Rat/Tax cells), which expressed the Tax but not Rex. Ribozymes were delivered into cells using anionic or cationic liposomes fused with hemagglutinating virus of Japan (HVJ). Cellular uptake of ribozymes complexed with HVJ-cationic liposomes was 15-20 times higher cellular uptake than naked ribozymes, and 4-5 times higher than that of ribozymes complexed with HVJ-anionic liposomes. HVJ-cationic liposomes promoted accumulation of ribozymes in cytoplasm and accelerated transport to the nucleus. Tax protein levels were decreased about 95% and were five times lower when the same amount of TR was introduced into the cells using HVJ-cationic, rather than HVJ-anionic liposomes. Inactive ribozyme and tax antisense oligodeoxynucleotides reduced Tax expression by about 20%, whereas RR and tax sense oligodeoxynucleotides had no effect. These results suggest that the ribozymes' effect against tax mRNA was sequence-specific, and HVJ-cationic liposomes can be useful for intracellular introduction of ribozymes.
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MESH Headings
- Animals
- Base Sequence
- Cell Line
- Drug Carriers
- Gene Products, rex/biosynthesis
- Gene Products, rex/metabolism
- Gene Products, tax/biosynthesis
- Gene Products, tax/metabolism
- Genes, pX
- Human T-lymphotropic virus 1/genetics
- Humans
- Kinetics
- Liposomes
- RNA, Catalytic/chemical synthesis
- RNA, Catalytic/metabolism
- RNA, Catalytic/pharmacokinetics
- RNA, Messenger/biosynthesis
- Rats
- Recombinant Proteins/biosynthesis
- Respirovirus
- Transcription, Genetic
- Transfection
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Affiliation(s)
- I Kitajima
- Department of Laboratory and Molecular Medicine, University of Kagoshima, 8-35-1 Sakuragaoka, Kagoshima 890, Japan
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Trihn D, Jeang KT, Semmes O. HTLV-I Tax and Cytokeratin: Tax-Expressing Cells Show Morphological Changes in Keratin-Containing Cytoskeletal Networks. J Biomed Sci 1997; 4:47-53. [PMID: 11725133 DOI: 10.1007/bf02255593] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022] Open
Abstract
Human T cell leukemia virus type I (HTLV-I) has been linked to the development of an aggressive lymphoproliferative disorder (adult T cell leukemia), a chronic neurodegenerative presentation (HTLV-I-associated myelopathy/tropical spastic paraparesis) and numerous less well-defined inflammatory conditions. The viral regulatory protein Tax has been implicated in cellular transformation events leading to the onset of adult T cell leukemia. Details on the stepwise processes through which Tax induces morphological changes in cells are poorly understood. We show here that Tax can bind to a class of intermediate filaments, the cytokeratins (Ker). Tax interacts with the 1B helical coil of keratin 8, a domain critical for higher-order intermediate filament matrix formation. Expression of Tax in epithelial cells visibly altered the structural pattern of the Ker network. In a T lymphocyte cell line, induction of Tax expression resulted in increased cellular adherence/invasion of Matrigel filters. We propose that one aspect of Tax function is the induction of morphological changes in cellular cytoskeletal structures. This finding for Tax-expressing cells might be one factor contributing directly to the pathogenesis of HTLV-I disease(s). Copyright 1997 S. Karger AG, Basel
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Affiliation(s)
- D. Trihn
- Molecular Virology Section, Laboratory of Molecular Microbiology, National Institute of Allergy and Infectious Diseases, Bethesda, Md., USA
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