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Samel A, Väärtnõu F, Verk L, Kurg K, Mutso M, Kurg R. How the Intrinsically Disordered N-Terminus of Cancer/Testis Antigen MAGEA10 Is Responsible for Its Expression, Nuclear Localisation and Aberrant Migration. Biomolecules 2023; 13:1704. [PMID: 38136576 PMCID: PMC10741916 DOI: 10.3390/biom13121704] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2023] [Revised: 11/16/2023] [Accepted: 11/22/2023] [Indexed: 12/24/2023] Open
Abstract
Melanoma-associated antigen A (MAGEA) subfamily proteins are normally expressed in testis and/or placenta. However, aberrant expression is detected in the tumour cells of multiple types of human cancer. MAGEA expression is mainly observed in cancers that have acquired malignant phenotypes, invasiveness and metastasis, and the expression of MAGEA family proteins has been linked to poor prognosis in cancer patients. All MAGE proteins share the common MAGE homology domain (MHD) which encompasses up to 70% of the protein; however, the areas flanking the MHD region vary between family members and are poorly conserved. To investigate the molecular basis of MAGEA10 expression and anomalous mobility in gel, deletion and point-mutation, analyses of the MAGEA10 protein were performed. Our data show that the intrinsically disordered N-terminal domain and, specifically, the first seven amino acids containing a unique linear motif, PRAPKR, are responsible for its expression, aberrant migration in SDS-PAGE and nuclear localisation. The aberrant migration in gel and nuclear localisation are not related to each other. Hiding the N-terminus with an epitope tag strongly affected its mobility in gel and expression in cells. Our results suggest that the intrinsically disordered domains flanking the MHD determine the unique properties of individual MAGEA proteins.
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Affiliation(s)
| | | | | | | | | | - Reet Kurg
- Institute of Technology, University of Tartu, 50411 Tartu, Estonia; (A.S.); (F.V.); (L.V.); (K.K.); (M.M.)
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2
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Proteomic and Biochemical Analysis of Extracellular Vesicles Isolated from Blood Serum of Patients with Melanoma. SEPARATIONS 2022. [DOI: 10.3390/separations9040086] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023] Open
Abstract
Background: Malignant melanoma is the most serious type of skin cancer with the highest mortality rate. Extracellular vesicles (EVs) have potential as new tumor markers that could be used as diagnostic and prognostic markers for early detection of melanoma. Methods: EVs were purified from the blood serum of melanoma patients using two methods—ultracentrifugation and PEG precipitation—and analyzed by mass spectrometry and immunoblot. Results: We identified a total of 585 unique proteins; 334 proteins were detected in PEG-precipitated samples and 515 in UC-purified EVs. EVs purified from patients varied in their size and concentration in different individuals. EVs obtained from stage II and III patients were, on average, smaller and more abundant than others. Detailed analysis of three potential biomarkers—SERPINA3, LGALS3BP, and gelsolin—revealed that the expression of SERPINA3 and LGALS3BP was higher in melanoma patients than healthy controls, while gelsolin exhibited higher expression in healthy controls. Conclusion: We suggest that all three proteins might have potential to be used as biomarkers, but a number of issues, such as purification of EVs, standardization, and validation of methods suitable for everyday clinical settings, still need to be addressed.
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Rupil LL, Del Carmen Serradell M, Luján HD. Production of Oral Vaccines Based on Virus-Like Particles Pseudotyped with Protozoan-Surface Proteins. Methods Mol Biol 2022; 2410:503-537. [PMID: 34914065 DOI: 10.1007/978-1-0716-1884-4_26] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Giardia lamblia is the only known parasite that can inhabit the harsh upper gastrointestinal tract, where most of the digestive proteases are secreted. Intestinal and free-living protozoa express surface proteins containing an extraordinarily high percentage of cysteine. These cysteine-rich variant-specific surface proteins (VSPs) form a dense coat on the entire surface of Giardia trophozoites, that coat protects the parasite inside the host intestine. VSPs not only are resistant to proteolytic digestion, extreme pH and temperatures, but also stimulate host immune responses. These properties can be used to protect as well as to increase the immunogenicity of vaccine antigens for oral administration. The incorporation of VSPs onto virus-like particles bearing viral antigens allows oral administration of these vaccines, protecting the antigens from degradation and generating robust and protective immune responses. In this chapter we describe the development of this versatile vaccine platform for the generation of safe, stable, and efficient oral vaccines, including their production and validation, as well as the characterization of immune response to oral immunization.
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Affiliation(s)
- Lucía Lara Rupil
- Centro de Investigación y Desarrollo en Inmunología y Enfermedades Infecciosas (CIDIE), Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET)/Universidad Católica de Córdoba (UCC), Córdoba, Argentina
- Facultad de Ciencias de la Salud, Universidad Católica de Córdoba (UCC), Córdoba, Argentina
| | - Marianela Del Carmen Serradell
- Centro de Investigación y Desarrollo en Inmunología y Enfermedades Infecciosas (CIDIE), Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET)/Universidad Católica de Córdoba (UCC), Córdoba, Argentina
- Laboratorio de Parasitología y Micología, Departamento de Bioquímica Clínica, Facultad de Ciencias Químicas, Universidad Nacional de Córdoba (UNC). Haya de la Torre y Medina Allende, Ciudad Universitaria, Córdoba, Argentina
| | - Hugo Daniel Luján
- Centro de Investigación y Desarrollo en Inmunología y Enfermedades Infecciosas (CIDIE), Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET)/Universidad Católica de Córdoba (UCC), Córdoba, Argentina.
- Facultad de Ciencias de la Salud, Universidad Católica de Córdoba (UCC), Córdoba, Argentina.
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MAGEA4 Coated Extracellular Vesicles Are Stable and Can Be Assembled In Vitro. Int J Mol Sci 2021; 22:ijms22105208. [PMID: 34069064 PMCID: PMC8155938 DOI: 10.3390/ijms22105208] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2021] [Revised: 05/02/2021] [Accepted: 05/11/2021] [Indexed: 12/18/2022] Open
Abstract
Extracellular vesicles (EVs) are valued candidates for the development of new tools for medical applications. Vesicles carrying melanoma-associated antigen A (MAGEA) proteins, a subfamily of cancer-testis antigens, are particularly promising tools in the fight against cancer. Here, we have studied the biophysical and chemical properties of MAGEA4-EVs and show that they are stable under common storage conditions such as keeping at +4 °C and -80 °C for at least 3 weeks after purification. The MAGEA4-EVs can be freeze-thawed two times without losing MAGEA4 in detectable quantities. The attachment of MAGEA4 to the surface of EVs cannot be disrupted by high salt concentrations or chelators, but the vesicles are sensitive to high pH. The MAGEA4 protein can bind to the surface of EVs in vitro, using robust passive incubation. In addition, EVs can be loaded with recombinant proteins fused to the MAGEA4 open reading frame within the cells and also in vitro. The high stability of MAGEA4-EVs ensures their potential for the development of EV-based anti-cancer applications.
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Chimeric VLPs Based on HIV-1 Gag and a Fusion Rabies Glycoprotein Induce Specific Antibodies against Rabies and Foot-and-Mouth Disease Virus. Vaccines (Basel) 2021; 9:vaccines9030251. [PMID: 33809060 PMCID: PMC7999769 DOI: 10.3390/vaccines9030251] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2021] [Revised: 03/07/2021] [Accepted: 03/08/2021] [Indexed: 12/25/2022] Open
Abstract
Foot and mouth disease is a livestock acute disease, causing economic losses in affected areas. Currently, control of this disease is performed by mandatory vaccination campaigns using inactivated viral vaccines. In this work, we describe the development of a chimeric VLP-based vaccine candidate for foot-and-mouth disease virus (FMDV), based on the co-expression of the HIV-1 Gag protein and a novel fusion rabies glycoprotein (RVG), which carries in its N-term the FMDV main antigen: the G-H loop. It is demonstrated by confocal microscopy that both Gag-GFP polyprotein and the G-H loop colocalize at the cell membrane and, that the Gag polyprotein of the HIV virus acts as a scaffold for enveloped VLPs that during the budding process acquires the proteins that are being expressed in the cell membrane. The obtained VLPs were spherical particles of 130 ± 40 nm in diameter (analyzed by TEM, Cryo-TEM and NTA) carrying an envelope membrane that efficiently display the GH-RVG on its surface (analyzed by gold immunolabeling). Immunostainings with a FMDV hyperimmune serum showed that the heterologous antigenic site, genetically fused to RVG, is recognized by specific G-H loop antibodies. Additionally, the cVLPs produced expose the G-H loop to the liquid surrounding (analyzed by specific ELISA). Finally, we confirmed that these FMD cVLPs are able to induce a specific humoral immune response, based on antibodies directed to the G-H loop in experimental animals.
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Pereira Aguilar P, Schneider TA, Wetter V, Maresch D, Ling WL, Tover A, Steppert P, Jungbauer A. Polymer-grafted chromatography media for the purification of enveloped virus-like particles, exemplified with HIV-1 gag VLP. Vaccine 2019; 37:7070-7080. [PMID: 31300289 DOI: 10.1016/j.vaccine.2019.07.001] [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: 11/26/2018] [Revised: 06/13/2019] [Accepted: 07/01/2019] [Indexed: 01/08/2023]
Abstract
Polymer-grafted chromatography media, especially ion exchangers, are high performance materials for protein purification. However, due to the pore size limitation, conventional chromatography beads are usually not considered for the downstream processing of large biomolecules such as virus-like particles (VLPs). Contrariwise, since the outer surface of the chromatography beads provides satisfactory binding capacity for VLPs and impurities of smaller size can bind inside of the beads, conventional porous beads should be considered for VLP capture and purification. We used HIV-1 gag VLPs with a diameter of 100-200 nm as a model to demonstrate that polymer-grafted anion exchangers are suitable for the purification of bionanoparticles. The equilibrium binding capacity was 1 × 1013 part/mL resin. Moderate salt concentration up to 100 mM NaCl did not affect binding, allowing direct loading of cell culture supernatant onto the column for purification. Dynamic binding capacity at 10% breakthrough, when loading cell culture supernatant, was approximately 6 × 1011 part/mL column; only 1-log lower than for monoliths. Endonuclease treatment of the cell culture supernatant did not increase the dynamic binding capacity, suggesting that dsDNA does not compete for the binding sites of VLPs. Nevertheless, due to simultaneous elution of particles and dsDNA, endonuclease treatment is required to reduce dsDNA contamination in the product. Proteomic analysis revealed that HIV-1 gag VLPs contain different host cell proteins in their cargo. This cargo is composed of conserved proteins and other proteins that vary from one particle population to another, as well as from batch to batch. This process allowed the separation of different particle populations. HIV-1 gag VLPs were directly captured and purified from cell culture supernatant with a total particle recovery in the elution of about 35%. Columns packed with beads can be scaled to practically any dimension and therefore a tailored design of the process is possible.
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Affiliation(s)
| | | | - Viktoria Wetter
- Austrian Centre of Industrial Biotechnology, Vienna, Austria
| | - Daniel Maresch
- Department of Biotechnology, University of Natural Resources and Life Sciences Vienna, Austria
| | - Wai Li Ling
- Univ. Grenoble Alpes, CEA, CNRS, IBS, F-38000 Grenoble, France
| | | | - Petra Steppert
- Department of Biotechnology, University of Natural Resources and Life Sciences Vienna, Austria
| | - Alois Jungbauer
- Department of Biotechnology, University of Natural Resources and Life Sciences Vienna, Austria; Austrian Centre of Industrial Biotechnology, Vienna, Austria.
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7
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Cancer-testis antigens MAGEA proteins are incorporated into extracellular vesicles released by cells. Oncotarget 2019; 10:3694-3708. [PMID: 31217903 PMCID: PMC6557214 DOI: 10.18632/oncotarget.26979] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2018] [Accepted: 05/13/2019] [Indexed: 12/21/2022] Open
Abstract
Melanoma-associated antigen A (MAGEA) family proteins represent a class of tumor antigens that are expressed in a variety of malignant tumors, but their expression in normal tissues is restricted to germ cells. MAGEA family consists of eleven proteins that are highly conserved sharing the common MAGE homology domain (MHD). In the current study, we show that MAGEA4 and MAGEA10 proteins are incorporated into extracellular vesicles released by mouse fibroblast and human osteosarcoma U2OS cells and are expressed, at least partly, on the surface of released EVs. The C-terminal part of the protein containing MHD domain is required for this activity. Expression of MAGEA proteins induced the budding of cells and formation of extracellular vesicles with 150 to 1500 nm in diameter. Our data suggest that the release of MAGEA-positive EVs is at least to some extent induced by the expression of MAGEA proteins itself. This may be one of the mechanisms of MAGEA proteins to induce cancer formation and progression.
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Sabapathy T, Helmerhorst E, Bottomley S, Babaeff S, Munyard K, Newsholme P, Mamotte CD. Use of virus-like particles as a native membrane model to study the interaction of insulin with the insulin receptor. BIOCHIMICA ET BIOPHYSICA ACTA-BIOMEMBRANES 2019; 1861:1204-1212. [PMID: 30951702 DOI: 10.1016/j.bbamem.2019.03.021] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/24/2018] [Revised: 03/15/2019] [Accepted: 03/28/2019] [Indexed: 12/15/2022]
Abstract
There is emerging evidence of the utility of virus-like particles (VLPs) as a novel model for the study of receptor-ligand interactions in a native plasma membrane environment. VLPs consist of a viral core protein encapsulated by portions of the cell membrane with membrane proteins and receptors expressed in their native conformation. VLPs can be generated in mammalian cells by transfection with the retroviral core protein (gag). In this study, we used Chinese hamster ovary (CHO T10) cells stably overexpressing the insulin receptor (IR) to generate IR bearing VLPs. The diameter and size uniformity of VLPs were estimated by dynamic light scattering and morphological features examined by scanning electron microscopy. The presence of high affinity IR on VLPs was demonstrated by competitive binding assays (KD: 2.3 ± 0.4 nM, n = 3), which was similar to that on the parental CHO T10 cells (KD: 2.1 ± 0.4 nM, n = 3). We also report that increases or decreases in membrane cholesterol content by treatment with methyl-β-cyclodextrin (MBCD) or cholesterol pre-loaded methyl-β-cyclodextrin (cMBCD), respectively, substantially decreased insulin binding (> 30%) to both VLPs and cells, and we speculate this is due to a change in receptor disposition. We suggest that this novel finding of decreases in insulin binding in response to changes in membrane cholesterol content may largely account for the unexplained decreases in insulin signalling events previously reported elsewhere. Finally, we propose VLPs as a viable membrane model for the study of insulin-IR interactions in a native membrane environment.
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Affiliation(s)
- Thiru Sabapathy
- School of Pharmacy and Biomedical Sciences, Australia; Curtin Health Innovation Research Institute, Curtin University, Bentley campus, Perth, Western Australia 6102, Australia.
| | - Erik Helmerhorst
- School of Pharmacy and Biomedical Sciences, Australia; Curtin Health Innovation Research Institute, Curtin University, Bentley campus, Perth, Western Australia 6102, Australia.
| | | | | | - Kylie Munyard
- School of Pharmacy and Biomedical Sciences, Australia; Curtin Health Innovation Research Institute, Curtin University, Bentley campus, Perth, Western Australia 6102, Australia.
| | - Philip Newsholme
- School of Pharmacy and Biomedical Sciences, Australia; Curtin Health Innovation Research Institute, Curtin University, Bentley campus, Perth, Western Australia 6102, Australia.
| | - Cyril D Mamotte
- School of Pharmacy and Biomedical Sciences, Australia; Curtin Health Innovation Research Institute, Curtin University, Bentley campus, Perth, Western Australia 6102, Australia.
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9
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Charlton Hume HK, Vidigal J, Carrondo MJT, Middelberg APJ, Roldão A, Lua LHL. Synthetic biology for bioengineering virus-like particle vaccines. Biotechnol Bioeng 2019; 116:919-935. [PMID: 30597533 PMCID: PMC7161758 DOI: 10.1002/bit.26890] [Citation(s) in RCA: 56] [Impact Index Per Article: 11.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2018] [Revised: 11/08/2018] [Accepted: 11/29/2018] [Indexed: 12/13/2022]
Abstract
Vaccination is the most effective method of disease prevention and control. Many viruses and bacteria that once caused catastrophic pandemics (e.g., smallpox, poliomyelitis, measles, and diphtheria) are either eradicated or effectively controlled through routine vaccination programs. Nonetheless, vaccine manufacturing remains incredibly challenging. Viruses exhibiting high antigenic diversity and high mutation rates cannot be fairly contested using traditional vaccine production methods and complexities surrounding the manufacturing processes, which impose significant limitations. Virus-like particles (VLPs) are recombinantly produced viral structures that exhibit immunoprotective traits of native viruses but are noninfectious. Several VLPs that compositionally match a given natural virus have been developed and licensed as vaccines. Expansively, a plethora of studies now confirms that VLPs can be designed to safely present heterologous antigens from a variety of pathogens unrelated to the chosen carrier VLPs. Owing to this design versatility, VLPs offer technological opportunities to modernize vaccine supply and disease response through rational bioengineering. These opportunities are greatly enhanced with the application of synthetic biology, the redesign and construction of novel biological entities. This review outlines how synthetic biology is currently applied to engineer VLP functions and manufacturing process. Current and developing technologies for the identification of novel target-specific antigens and their usefulness for rational engineering of VLP functions (e.g., presentation of structurally diverse antigens, enhanced antigen immunogenicity, and improved vaccine stability) are described. When applied to manufacturing processes, synthetic biology approaches can also overcome specific challenges in VLP vaccine production. Finally, we address several challenges and benefits associated with the translation of VLP vaccine development into the industry.
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Affiliation(s)
- Hayley K. Charlton Hume
- The University of Queensland, Australian Institute of Bioengineering and NanotechnologySt LuciaQueenslandAustralia
| | - João Vidigal
- Health & Pharma Division, Animal Cell Technology Unit, Instituto de Biologia Experimental e Tecnológica (iBET)OeirasPortugal
- Health & Pharma Division, Animal Cell Technology Unit, Instituto de Tecnologia Química e Biológica António Xavier, Universidade Nova de Lisboa, Av. da RepúblicaOeirasPortugal
| | - Manuel J. T. Carrondo
- Health & Pharma Division, Animal Cell Technology Unit, Instituto de Biologia Experimental e Tecnológica (iBET)OeirasPortugal
| | - Anton P. J. Middelberg
- Faculty of Engineering, Computer and Mathematical Sciences, The University of AdelaideAdelaideSouth AustraliaAustralia
| | - António Roldão
- Health & Pharma Division, Animal Cell Technology Unit, Instituto de Biologia Experimental e Tecnológica (iBET)OeirasPortugal
- Health & Pharma Division, Animal Cell Technology Unit, Instituto de Tecnologia Química e Biológica António Xavier, Universidade Nova de Lisboa, Av. da RepúblicaOeirasPortugal
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Renner TM, Bélanger K, Langlois MA. Selective Isolation of Retroviruses from Extracellular Vesicles by Intact Virion Immunoprecipitation. Bio Protoc 2018; 8:e3005. [PMID: 34395797 DOI: 10.21769/bioprotoc.3005] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2018] [Revised: 08/16/2018] [Accepted: 08/29/2018] [Indexed: 01/08/2023] Open
Abstract
There exists a wide variety of techniques to isolate and purify viral particles from cell culture supernatants. However, these techniques vary greatly in ease of use, purity, yield and impact on viral structural integrity. Most importantly, it is becoming evident that secreted extracellular vesicles (EVs) co-purify with retroviruses using nearly all purification methods due to nearly indistinguishable biophysical characteristics such as size, buoyant density and nucleic acid content. Recently, our group has illustrated a means of isolating intact and highly enriched retroviral virions from EV-containing cell supernatants using an immunoprecipitation approach targeting the viral envelope glycoprotein of the Moloney Murine Leukemia Virus ( Renner et al., 2018 ). This technique, that we call intact virion immunoprecipitation (IVIP), enabled us to characterize the accessibility of epitopes on the surface of these retroviruses and assess the orientation of the virus-encoded integral membrane protein Glycogag (gPr80) in the viral envelope. Proper implementation of this protocol enables fast, simple and reproducible preparations of intact and highly purified retroviral particles devoid of detectable EV contaminants.
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Affiliation(s)
- Tyler Milston Renner
- Department of Biochemistry, Microbiology & Immunology, University of Ottawa, Ottawa, Canada
| | - Kasandra Bélanger
- Department of Biochemistry, Microbiology & Immunology, University of Ottawa, Ottawa, Canada
| | - Marc-André Langlois
- Department of Biochemistry, Microbiology & Immunology, University of Ottawa, Ottawa, Canada
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Tamberg N, Tahk S, Koit S, Kristjuhan K, Kasvandik S, Kristjuhan A, Ilves I. Keap1-MCM3 interaction is a potential coordinator of molecular machineries of antioxidant response and genomic DNA replication in metazoa. Sci Rep 2018; 8:12136. [PMID: 30108253 PMCID: PMC6092318 DOI: 10.1038/s41598-018-30562-y] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2018] [Accepted: 08/02/2018] [Indexed: 01/19/2023] Open
Abstract
Coordination of DNA replication and cellular redox homeostasis mechanisms is essential for the sustained genome stability due to the sensitivity of replicating DNA to oxidation. However, substantial gaps remain in our knowledge of underlying molecular pathways. In this study, we characterise the interaction of Keap1, a central antioxidant response regulator in Metazoa, with the replicative helicase subunit protein MCM3. Our analysis suggests that structural determinants of the interaction of Keap1 with its critical downstream target - Nrf2 master transactivator of oxidative stress response genes – may have evolved in evolution to mimic the conserved helix-2-insert motif of MCM3. We show that this has led to a competition between MCM3 and Nrf2 proteins for Keap1 binding, and likely recruited MCM3 for the competitive binding dependent modulation of Keap1 controlled Nrf2 activities. We hypothesise that such mechanism could help to adjust the Keap1-Nrf2 antioxidant response pathway according to the proliferative and replicative status of the cell, with possible reciprocal implications also for the regulation of cellular functions of MCM3. Altogether this suggests about important role of Keap1-MCM3 interaction in the cross-talk between replisome and redox homeostasis machineries in metazoan cells.
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Affiliation(s)
- Nele Tamberg
- Institute of Technology, University of Tartu, Tartu, 50411, Estonia
| | - Siret Tahk
- Institute of Technology, University of Tartu, Tartu, 50411, Estonia
| | - Sandra Koit
- Institute of Technology, University of Tartu, Tartu, 50411, Estonia
| | - Kersti Kristjuhan
- Institute of Molecular and Cell Biology, University of Tartu, Tartu, 51010, Estonia
| | - Sergo Kasvandik
- Institute of Technology, University of Tartu, Tartu, 50411, Estonia
| | - Arnold Kristjuhan
- Institute of Molecular and Cell Biology, University of Tartu, Tartu, 51010, Estonia
| | - Ivar Ilves
- Institute of Technology, University of Tartu, Tartu, 50411, Estonia.
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Õunap K, Kurg K, Võsa L, Maiväli Ü, Teras M, Planken A, Ustav M, Kurg R. Antibody response against cancer-testis antigens MAGEA4 and MAGEA10 in patients with melanoma. Oncol Lett 2018; 16:211-218. [PMID: 29928403 PMCID: PMC6006456 DOI: 10.3892/ol.2018.8684] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2017] [Accepted: 04/19/2018] [Indexed: 02/06/2023] Open
Abstract
Melanoma-associated antigen A (MAGEA) represent a class of tumor antigens that are expressed in a variety of malignant tumors, however, their expression in healthy normal tissues is restricted to germ cells of testis, fetal ovary and placenta. The restricted expression and immunogenicity of these antigens make them ideal targets for immunotherapy in human cancer. In the present study the presence of naturally occurring antibodies against two MAGEA subfamily proteins, MAGEA4 and MAGEA10, was analyzed in patients with melanoma at different stages of disease. Results indicated that the anti-MAGEA4/MAGEA10 immune response in melanoma patients was heterogeneous, with only ~8% of patients having a strong response. Comparing the number of strongly responding patients between different stages of disease revealed that the highest number of strong responses was detected among stage II melanoma patients. These findings support the model that the immune system is involved in the control of melanoma in the early stages of disease.
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Affiliation(s)
- Kadri Õunap
- Institute of Technology, University of Tartu, 50411 Tartu, Estonia
| | - Kristiina Kurg
- Institute of Technology, University of Tartu, 50411 Tartu, Estonia
| | - Liisi Võsa
- Institute of Technology, University of Tartu, 50411 Tartu, Estonia
| | - Ülo Maiväli
- Institute of Technology, University of Tartu, 50411 Tartu, Estonia
| | - Marina Teras
- Melanoma Unit of The General Surgery and Oncology Surgery Centre, North Estonian Medical Centre, 13419 Tallinn, Estonia
| | - Anu Planken
- Melanoma Unit of The General Surgery and Oncology Surgery Centre, North Estonian Medical Centre, 13419 Tallinn, Estonia
| | - Mart Ustav
- Institute of Technology, University of Tartu, 50411 Tartu, Estonia
| | - Reet Kurg
- Institute of Technology, University of Tartu, 50411 Tartu, Estonia
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13
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Vidigal J, Fernandes B, Dias MM, Patrone M, Roldão A, Carrondo MJT, Alves PM, Teixeira AP. RMCE-based insect cell platform to produce membrane proteins captured on HIV-1 Gag virus-like particles. Appl Microbiol Biotechnol 2017; 102:655-666. [DOI: 10.1007/s00253-017-8628-3] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2017] [Revised: 11/03/2017] [Accepted: 11/05/2017] [Indexed: 12/20/2022]
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14
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Steppert P, Burgstaller D, Klausberger M, Kramberger P, Tover A, Berger E, Nöbauer K, Razzazi‐Fazeli E, Jungbauer A. Separation of HIV‐1 gag virus‐like particles from vesicular particles impurities by hydroxyl‐functionalized monoliths. J Sep Sci 2017; 40:979-990. [DOI: 10.1002/jssc.201600765] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2016] [Revised: 11/23/2016] [Accepted: 11/23/2016] [Indexed: 11/05/2022]
Affiliation(s)
- Petra Steppert
- Department of Biotechnology University of Natural Resources and Life Sciences Vienna Austria
| | - Daniel Burgstaller
- Department of Biotechnology University of Natural Resources and Life Sciences Vienna Austria
| | - Miriam Klausberger
- Department of Biotechnology University of Natural Resources and Life Sciences Vienna Austria
| | | | | | - Eva Berger
- Austrian Centre of Industrial Biotechnology Vienna Austria
| | - Katharina Nöbauer
- VetCore Facility for Research University of Veterinary Medicine Vienna Vienna Austria
| | | | - Alois Jungbauer
- Department of Biotechnology University of Natural Resources and Life Sciences Vienna Austria
- Austrian Centre of Industrial Biotechnology Vienna Austria
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