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Wen Z, Jia Q, Kang X, Lou Y, Zou L, Yang J, Gao J, Han L, Li X. Antitumor activity of recombinant RGD-IFN-α2a-core fusion protein in vitro. Anticancer Drugs 2017; 28:31-39. [PMID: 27759573 PMCID: PMC5131691 DOI: 10.1097/cad.0000000000000421] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2016] [Accepted: 07/24/2016] [Indexed: 12/14/2022]
Abstract
Interferon (IFN) regulates immune responses and antitumor activity. Arginine-glycine-aspartic acid (RGD) peptides can specifically bind to integrin αvβ3, a transmembrane receptor that is highly expressed on the surface of various cancer cells. In this study, we expressed recombinant RGD-IFN-α2a-core fusion proteins and assessed their antitumor activity in vitro. Two RGD-IFN-α2a-core fusion proteins and a negative control protein were expressed in vitro. These two RGD-IFN-α2a-core fusion proteins could bind the tumor cell surface specifically and did not bind to normal cells. RGD-IFN-α2a-core fusion protein treatment of tumor cells significantly reduced cell viability and induced apoptosis in a dose-dependent manner. At the 'mRNA' level, both proteins could upregulate CASP3 expression. These data indicate that both laboratory-engineered RGD-IFN-α2a-core fusion proteins could bind the surface of tumor cells and induce apoptosis in vitro. Further studies will investigate the in-vivo antitumor activities of the RGD-IFN-α2a-core fusion proteins.
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Affiliation(s)
- Zhengwei Wen
- Department of Nuclear Medicine, School of Basic Medical Sciences
| | - Qunying Jia
- The First Hospital of Changsha City, Kaifu District, Changsha, China
| | - Xiaojuan Kang
- Department of Nuclear Medicine, School of Basic Medical Sciences
| | - Yongliang Lou
- Zhejiang Provincial Key Lab of Medical Genetics
- Zhejiang Provincial Key Lab for Technology and Application of Model Organisms
- Institute of Medical Virology, School of Laboratory Medicine and Life Science, Wenzhou Medical University, Wenzhou
| | - Lilin Zou
- Zhejiang Provincial Key Lab of Medical Genetics
- Zhejiang Provincial Key Lab for Technology and Application of Model Organisms
| | - Jifeng Yang
- Zhejiang Provincial Key Lab of Medical Genetics
- Zhejiang Provincial Key Lab for Technology and Application of Model Organisms
| | - Jimin Gao
- Zhejiang Provincial Key Lab of Medical Genetics
- Zhejiang Provincial Key Lab for Technology and Application of Model Organisms
| | - Liping Han
- Department of Nuclear Medicine, School of Basic Medical Sciences
| | - Xiang Li
- Zhejiang Provincial Key Lab of Medical Genetics
- Zhejiang Provincial Key Lab for Technology and Application of Model Organisms
- Institute of Medical Virology, School of Laboratory Medicine and Life Science, Wenzhou Medical University, Wenzhou
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Zhang X, Qi DD, Zhang TT, Chen QX, Wang GZ, Sui GY, Hao XW, Sun S, Song X, Chen YL. Antitumor activity of adenoviral vector containing T42 and 4xT42 peptide gene through inducing apoptosis of tumor cells and suppressing angiogenesis. Mol Med Rep 2014; 11:2083-91. [PMID: 25384346 DOI: 10.3892/mmr.2014.2910] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2014] [Accepted: 10/20/2014] [Indexed: 11/05/2022] Open
Abstract
The T42 peptide, generated from two active fragments of tumstatin, has been shown to have anti‑tumor activity. The adenoviral vector is the most frequently used vector in research and clinical trials for gene therapy. In the present study, the anti‑tumor activity of the T42 peptide and quadruple T42 (4xT42) peptide adenoviral vectors were elucidated for the first time, to the best of our knowledge. Human embryonic kidney 293 cells were infected with plasmid adenovirus (pAd)‑enhanced green fluorescent protein (EGFP)‑T42 or pAd‑EGFP‑4xT42 and the expression of the T42 and 4xT42 genes was confirmed by the identification of GFP expression and reverse transcription polymerase chain reaction experiments. The anti‑cancer effects of pAd‑EGFP‑T42 and pAd‑EGFP‑4xT42 on breast cancer cells in vivo and in vitro were subsequently investigated. The results indicated that the packaging of the recombinant adenoviruses with the viral titer was successful, following purification at 5x109 plaque forming units/ml. The results also revealed that the recombinant adenoviruses promoted apoptosis in MCF‑7 breast cancer cells and inhibited cancer growth. Through the analysis of caspase‑3, B‑cell lymphoma 2 (Bcl‑2) and Bcl‑2‑associated X protein expression, it was demonstrated that the T42/4xT42 peptide may induce apoptosis via the mitochondrial pathway. In addition, mouse xenograft experiments confirmed that the T42 peptide inhibited tumor growth and reduced angiogenesis in vivo. In conclusion, the results of the present study indicated that the T42 and 4xT42 peptide genes, transfected by a recombinant adenovirus, may provide a potential novel strategy for the treatment of breast cancer.
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Affiliation(s)
- Xiong Zhang
- Department of Psychiatry, Hulunbeier Mental Health Center, Yakeshi, Inner Mongolia 022150, P.R. China
| | - Dong-Dong Qi
- Clinical Laboratory, Hulunbeier Mental Health Center, Yakeshi, Inner Mongolia 022150, P.R. China
| | - Ting-Ting Zhang
- Department of Urinary Surgery, General Hospital of Daqing Oil Field, Daqing, Heilongjiang 163000, P.R. China
| | - Qing-Xin Chen
- Department of Pharmacology, Harbin Medical University, Harbin, Heilongjiang 150000, P.R. China
| | - Guang-Zhi Wang
- Department of Pathology, The Fifth Affiliated Hospital, Harbin Medical University, Daqing, Heilongjiang 163319, P.R. China
| | - Guang-Yu Sui
- Clinical Laboratory, Chinese Medicine Hospital of Daqing, Daqing, Heilongjiang 163319, P.R. China
| | - Xue-Wei Hao
- Department of Immunology, College of Medical Laboratory Science and Technology, Harbin Medical University‑Daqing, Daqing, Heilongjiang 163319, P.R. China
| | - Shouli Sun
- Department of Immunology, College of Medical Laboratory Science and Technology, Harbin Medical University‑Daqing, Daqing, Heilongjiang 163319, P.R. China
| | - Xue Song
- Department of Immunology, College of Medical Laboratory Science and Technology, Harbin Medical University‑Daqing, Daqing, Heilongjiang 163319, P.R. China
| | - Ying-Li Chen
- Department of Immunology, College of Medical Laboratory Science and Technology, Harbin Medical University‑Daqing, Daqing, Heilongjiang 163319, P.R. China
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Li Y, Wu J, Song F, Tang J, Wang SJ, Yu XL, Chen ZN, Jiang JL. Extracellular membrane-proximal domain of HAb18G/CD147 binds to metal ion-dependent adhesion site (MIDAS) motif of integrin β1 to modulate malignant properties of hepatoma cells. J Biol Chem 2011; 287:4759-72. [PMID: 22130661 DOI: 10.1074/jbc.m111.277699] [Citation(s) in RCA: 56] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023] Open
Abstract
Several lines of evidence suggest that HAb18G/CD147 interacts with the integrin variants α3β1 and α6β1. However, the mechanism of the interaction remains largely unknown. In this study, mammalian protein-protein interaction trap (MAPPIT), a mammalian two-hybrid method, was used to study the CD147-integrin β1 subunit interaction. CD147 in human hepatocellular carcinoma (HCC) cells was interfered with by small hairpin RNA. Nude mouse xenograft model and metastatic model of HCC were used to detect the role of CD147 in carcinogenesis and metastasis. We found that the extracellular membrane-proximal domain of HAb18G/CD147 (I-type domain) binds at the metal ion-dependent adhesion site in the βA domain of the integrin β1 subunit, and Asp(179) in the I-type domain of HAb18G/CD147 plays an important role in the interaction. The levels of the proteins that act downstream of integrin, including focal adhesion kinase (FAK) and phospho-FAK, were decreased, and the cytoskeletal structures of HCC cells were rearranged bearing the HAb18G/CD147 deletion. Simultaneously, the migration and invasion capacities, secretion of matrix metalloproteinases, colony formation rate in vitro, and tumor growth and metastatic potential in vivo were decreased. These results indicate that the interaction of HAb18G/CD147 extracellular I-type domain with the integrin β1 metal ion-dependent adhesion site motif activates the downstream FAK signaling pathway, subsequently enhancing the malignant properties of HCC cells.
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Affiliation(s)
- Yong Li
- Cell Engineering Research Centre and Department of Cell Biology, State Key Laboratory of Cancer Biology, Fourth Military Medical University, Xi'an 710032, China
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Suri SS, Rakotondradany F, Myles AJ, Fenniri H, Singh B. The role of RGD-tagged helical rosette nanotubes in the induction of inflammation and apoptosis in human lung adenocarcinoma cells through the P38 MAPK pathway. Biomaterials 2009; 30:3084-90. [DOI: 10.1016/j.biomaterials.2009.02.014] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2008] [Accepted: 02/03/2009] [Indexed: 12/14/2022]
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Morigi M, Buelli S, Angioletti S, Zanchi C, Longaretti L, Zoja C, Galbusera M, Gastoldi S, Mundel P, Remuzzi G, Benigni A. In response to protein load podocytes reorganize cytoskeleton and modulate endothelin-1 gene: implication for permselective dysfunction of chronic nephropathies. THE AMERICAN JOURNAL OF PATHOLOGY 2005; 166:1309-20. [PMID: 15855633 PMCID: PMC1606387 DOI: 10.1016/s0002-9440(10)62350-4] [Citation(s) in RCA: 108] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
Effacement of podocyte foot processes occurs in many proteinuric nephropathies and is accompanied by rearrangement of the actin cytoskeleton. Here, we studied whether protein overload affects intracellular pathways, leading to cytoskeletal architecture changes and ultimately to podocyte dysfunction. Mouse podocytes bound and endocytosed both albumin and IgG via receptor-specific mechanisms. Protein overload caused redistribution of F-actin fibers instrumental to up-regulation of the prepro-endothelin (ET)-1 gene and production of the corresponding peptide. Increased DNA-binding activity for nuclear factor (NF)-kappaB and Ap-1 nuclear proteins was measured in nuclear extracts of podocytes exposed to excess proteins. Both Y27632, which inhibits Rho kinase-dependent stress fiber formation, and jasplakinolide, an F-actin stabilizer, decreased NF-kappaB and Ap-1 activity and reduced ET-1 expression. This suggested a role for the cytoskeleton, through activated Rho, in the regulation of the ET-1 peptide. Focal adhesion kinase (FAK), an integrin-associated nonreceptor tyrosine kinase, was phosphorylated by albumin treatment via Rho kinase-triggered actin reorganization. FAK activation led to NF-kappaB- and Ap-1-dependent ET-1 expression. These data suggest that reorganization of the actin cytoskeletal network in response to protein load is implicated in modulation of the ET-1 gene via Rho kinase-dependent FAK activation of NF-kappaB and Ap-1 in differentiated podocytes. Increased ET-1 generation might alter glomerular permselectivity and amplify the noxious effect of protein overload on dysfunctional podocytes.
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Affiliation(s)
- Marina Morigi
- Mario Negri Institute for Pharmacological Research, Via Gavazzeni 11, 24125 Bergamo, Italy.
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Ortega-Velázquez R, Díez-Marqués ML, Ruiz-Torres MP, González-Rubio M, Rodríguez-Puyol M, Rodríguez Puyol D. Arg-Gly-Asp-Ser (RGDS) peptide stimulates transforming growth factor beta1 transcription and secretion through integrin activation. FASEB J 2003; 17:1529-31. [PMID: 12824296 DOI: 10.1096/fj.02-0785fje] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
Extracellular matrix (ECM) components, through specific peptide motifs such as Arg-Gly-Asp (RGD), interact with integrins and can modify the behavior of cells. Transforming growth factor-beta1 (TGF-beta1) is the main cytokine involved in the synthesis of ECM proteins. We analyzed the effect of a RGD-containing peptide, as Arg-Gly-Asp-Ser (RGDS), on the regulation of TGF-beta1 secretion in cultured human mesangial cells. We found that RGDS increased mRNA expression and secretion of TGF-beta1 by stimulating the TGF-beta1 gene promoter. This effect was dependent on the interaction of RGDS with integrins. We evaluated the signaling pathways implicated in TGF-beta1 production by analyzing the effect of RGDS on kinase-related integrins. RGDS stimulated tyrosine phosphorylation as well as integrin-linked kinase (ILK) activity. However, tyrosine kinase inhibitors did not prevent the RGDS effect. In contrast, the inhibition of ILK by cell transfection with a kinase dead-ILK completely abolished the increased TGF-beta1 secretion and promoter activity in the presence of RGDS. Thus RGDS modulates the secretion of TGF-beta1, probably through increased synthesis by interacting with integrins and activating ILK. This supports a role for ECM components in the regulation of their own secretion.
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Affiliation(s)
- R Ortega-Velázquez
- Department of Physiology, Alcalá University, Nephrology Section, Hospital Príncipe de Asturias, and IRSIN, Madrid, Spain
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Pat BK, Cuttle L, Watters D, Yang T, Johnson DW, Gobe GC. Fibrogenic stresses activate different mitogen-activated protein kinase pathways in renal epithelial, endothelial or fibroblast cell populations. Nephrology (Carlton) 2003; 8:196-204. [PMID: 15012721 DOI: 10.1046/j.1440-1797.2003.00162.x] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Fibrogenic stresses promote progression of renal tubulointerstitial fibrosis, disparately affecting survival, proliferation and trans-differentiation of intrinsic renal cell populations through ill-defined biomolecular pathways. We investigated the effect of fibrogenic stresses on the activation of cell-specific mitogen-activated protein kinase (MAPK) in renal fibroblast, epithelial and endothelial cell populations. The relative outcomes (cell death, proliferation, trans-differentiation) associated with activation or inhibition of extracellular-regulated protein kinase (ERK) or stress activated/c-Jun N terminal kinase (JNK) were analysed in each renal cell population after challenge with oxidative stress (1 mmol/L H2O2), transforming growth factor-beta1 (TGF-beta1, 10 ng/mL) or tumour necrosis factor-alpha (TNF-alpha, 50 ng/mL) over 0-20 h. Apoptosis increased significantly in all cell types after oxidative stress (P < 0.05). In fibroblasts, oxidative stress caused the activation of ERK (pERK) but not JNK (pJNK). Inhibition of ERK by PD98059 supported its role in a fibroblast death pathway. In epithelial and endothelial cells, oxidative stress-induced apoptosis was preceded by early induction of pERK, but its inhibition did not support a pro-apoptotic role. Early ERK activity may be conducive to their survival or promote the trans-differentiation of epithelial cells. In epithelial and endothelial cells, oxidative stress induced pJNK acutely. Pretreatment with SP600125 (JNK inhibitor) verified its pro-apoptotic activity only in epithelial cells. Transforming growth factor-beta1 did not significantly alter mitosis or apoptosis in any of the cell types, nor did it alter MAPK activity. Tumor necrosis factor-alpha caused increased apoptosis with no associated change in MAPK activity. Our results demonstrate renal cell-specific differences in the activation of ERK and JNK following fibrotic insult, which may be useful for targeting excessive fibroblast proliferation in chronic fibrosis.
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Affiliation(s)
- Betty K Pat
- Department of Molecular and Cellular Pathology, School of Medicine, University of Queensland, Herston Road, Herston, Brisbane 4006, Queensland, Australia
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Stupack DG, Cheresh DA. Get a ligand, get a life: integrins, signaling and cell survival. J Cell Sci 2002; 115:3729-38. [PMID: 12235283 DOI: 10.1242/jcs.00071] [Citation(s) in RCA: 433] [Impact Index Per Article: 19.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
Programmed cell death is crucial for the development and maintenance of multicellular organisms. The decision to live, or to die, depends, at the cellular level, upon the cell's interaction with extracellular cues that trigger cell signaling pathways promoting survival or death. The extracellular matrix (ECM) influences the execution of the apoptotic program through the actions of adhesion receptors. Among these, integrins initiate a variety of downstream signaling events in response to ECM ligation. Integrins directly activate survival pathways via the PI 3-kinase and MAPK pathways and act as essential cofactors for their stimulation by growth factors. Conversely, elevated integrin expression in the absence of appropriate ligands, or in the presence of natural or synthetic antagonists, can promote apoptosis under otherwise permissive growth conditions. Integrins thus act in a crucial biosensory role, coordinating survival or death responses as a function of ECM composition. This dual function provides an elegant mechanism through which tissue-remodeling events may regulate cell death or survival in a temporal, ECM-governed manner.
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Affiliation(s)
- Dwayne G Stupack
- Department of Immunology, The Scripps Research Institute, 10550 North Torrey Pines Rd, La Jolla, CA, 92037, USA.
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Allen CM, Sharman WM, La Madeleine C, van Lier JE, Weber JM. Attenuation of photodynamically induced apoptosis by an RGD containing peptide. Photochem Photobiol Sci 2002; 1:246-54. [PMID: 12661964 DOI: 10.1039/b109979e] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Research efforts have focused on the improvement of already established photodynamic therapy (PDT) protocols. The use of adjunct therapies is one such route. The integrin class of receptors mediates extracellular matrix signals through a complex maze of intertwining cellular pathways. The Arg-Gly-Asp (RGD) motif is known to bind to several of the 25 known integrin receptor types. Soluble RGD peptides under most circumstances induce apoptosis in a number of cell lines In this study, the effect of an RGD-containing peptide on the photodynamic action of aluminium disulfophthalocyanine (A1PcS(2adj)) was investigated. Adenocarcinoma lung cancer cells (A549) and murine mammary cancer cells (EMT-6) were treated with A1PcS(2adj) in the presence of soluble RGD. At elevated RGD concentrations (10 mM) apoptosis was induced by the peptide alone. It was shown that at lower concentrations, RGD abrogated the apoptotic effect of PDT in both cell lines, as assessed by an MTT cytotoxicity assay, nucleosomal DNA laddering and the formation of apoptotic bodies. RGD protection against apoptosis was more pronounced in the A549 receptor positive cell line which exhibits over 70% cell survival when using 100 microM RGD peptide under LD90 conditions. Different parameters were investigated to clearly establish that the attenuation of cell killing was not solely due to quenching of the excited species by the peptide. Indeed, the phenomenon is not photophysical but biological.
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Affiliation(s)
- Cynthia M Allen
- Department of Nuclear Medicine and Radiobiology, Université de Sherbrooke, Sherbrooke, Québec, Canada J1H 5N4
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