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Barriuso B, Antolín P, Arias FJ, Girotti A, Jiménez P, Cordoba-Diaz M, Cordoba-Diaz D, Girbés T. Anti-Human Endoglin (hCD105) Immunotoxin-Containing Recombinant Single Chain Ribosome-Inactivating Protein Musarmin 1. Toxins (Basel) 2016; 8:E184. [PMID: 27294959 PMCID: PMC4926150 DOI: 10.3390/toxins8060184] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2016] [Revised: 05/24/2016] [Accepted: 06/03/2016] [Indexed: 12/25/2022] Open
Abstract
Endoglin (CD105) is an accessory component of the TGF-β receptor complex, which is expressed in a number of tissues and over-expressed in the endothelial cells of tumor neovasculature. Targeting endoglin with immunotoxins containing type 2 ribosome-inactivating proteins has proved an effective tool to reduce blood supply to B16 mice tumor xenografts. We prepared anti-endoglin immunotoxin (IT)-containing recombinant musarmin 1 (single chain ribosome-inactivating proteins) linked to the mouse anti-human CD105 44G4 mouse monoclonal antibody via N-succinimidyl 3-(2-pyridyldithio) propionate (SPDP). The immunotoxin specifically killed L929 fibroblast mouse cells transfected with the short form of human endoglin with IC50 values in the range of 5 × 10(-10) to 10(-9) M.
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Affiliation(s)
- Begoña Barriuso
- Department of Biochemistry and Molecular Biology, University of Valladolid, 47005 Valladolid, Spain.
| | - Pilar Antolín
- Department of Biochemistry and Molecular Biology, University of Valladolid, 47005 Valladolid, Spain.
| | - F Javier Arias
- Department of Biochemistry and Molecular Biology, University of Valladolid, 47005 Valladolid, Spain.
- Bioforge, University of Valladolid, Spain and Networking Research Center on Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN), 47002 Valladolid, Spain.
| | - Alessandra Girotti
- Bioforge, University of Valladolid, Spain and Networking Research Center on Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN), 47002 Valladolid, Spain.
| | - Pilar Jiménez
- Department of Nutrition and Bromatology, University of Valladolid, 47005 Valladolid, Spain.
| | - Manuel Cordoba-Diaz
- Department of Pharmacy & Pharmaceutical Technology and University Institute of Industrial Pharmacy (IUFI), Complutense University of Madrid, 28040 Madrid, Spain.
| | - Damián Cordoba-Diaz
- Department of Pharmacy & Pharmaceutical Technology and University Institute of Industrial Pharmacy (IUFI), Complutense University of Madrid, 28040 Madrid, Spain.
| | - Tomás Girbés
- Department of Nutrition and Bromatology, University of Valladolid, 47005 Valladolid, Spain.
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Reyes AG, Geukens N, Gutschoven P, De Graeve S, De Mot R, Mejía A, Anné J. The Streptomyces coelicolor genome encodes a type I ribosome-inactivating protein. Microbiology (Reading) 2010; 156:3021-3030. [DOI: 10.1099/mic.0.039073-0] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Ribosome-inactivating proteins (RIPs) are cytotoxic N-glycosidases identified in numerous plants, but also constitute a subunit of the bacterial Shiga toxin. Classification of plant RIPs is based on the absence (type I) or presence (type II) of an additional lectin module. In Shiga toxin, sugar binding is mediated by a distinct RIP-associated homopentamer. In the genome of two actinomycetes, we identified RIP-like proteins that resemble plant type I RIPs rather than the RIP subunit (StxA) of Shiga toxin. Some representatives of β- and γ-proteobacteria also contain genes encoding RIP-like proteins, but these are homologous to StxA. Here, we describe the isolation and initial characterization of the RIP-like gene product SCO7092 (RIPsc) from the Gram-positive soil bacterium Streptomyces coelicolor. The ripsc gene was expressed in Escherichia coli as a recombinant protein of about 30 kDa, and displayed the characteristic N-glycosidase activity causing specific rRNA depurination. In Streptomyces lividans and E. coli, RIPsc overproduction resulted in a dramatic decrease in the growth rate. In addition, intracellular production was deleterious for Saccharomyces cerevisiae. However, when applied externally to microbial cells, purified RIPsc did not display antibacterial or antifungal activity, suggesting that it cannot enter these cells. In a cell-free system, however, purified S. coelicolor RIPsc protein displayed strong inhibitory activity towards protein translation.
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Affiliation(s)
- Ana G. Reyes
- Departamento de Biotecnología, División de Ciencias Biológicas y de la Salud, Universidad Autónoma Metropolitana, Mexico City, Mexico
- Laboratory of Bacteriology, Rega Institute for Medical Research, Katholieke Universiteit Leuven, Minderbroedersstraat 10, B-3000 Leuven, Belgium
| | - Nick Geukens
- Laboratory of Bacteriology, Rega Institute for Medical Research, Katholieke Universiteit Leuven, Minderbroedersstraat 10, B-3000 Leuven, Belgium
| | - Philip Gutschoven
- Laboratory of Bacteriology, Rega Institute for Medical Research, Katholieke Universiteit Leuven, Minderbroedersstraat 10, B-3000 Leuven, Belgium
| | - Stijn De Graeve
- Laboratory of Molecular Cell Biology, Institute of Botany and Microbiology, Katholieke Universiteit Leuven, B-3001 Heverlee-Leuven, Belgium
- VIB Department of Molecular Microbiology, Kasteelpark Arenberg 31, B-3001 Heverlee-Leuven, Belgium
| | - René De Mot
- Centre of Microbial and Plant Genetics, Department of Microbial and Molecular Systems, Faculty of Bioscience Engineering, Katholieke Universiteit Leuven, B-3001 Heverlee-Leuven, Belgium
| | - Armando Mejía
- Departamento de Biotecnología, División de Ciencias Biológicas y de la Salud, Universidad Autónoma Metropolitana, Mexico City, Mexico
| | - Jozef Anné
- Laboratory of Bacteriology, Rega Institute for Medical Research, Katholieke Universiteit Leuven, Minderbroedersstraat 10, B-3000 Leuven, Belgium
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