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Ortega L, Carrera C, Muñoz-Flores C, Salazar S, Villegas MF, Starck MF, Valenzuela A, Agurto N, Montesino R, Astuya A, Parra N, Pérez ET, Santibáñez N, Romero A, Ruíz P, Lamazares E, Reyes F, Sánchez O, Toledo JR, Acosta J. New insight into the biological activity of Salmo salar NK-lysin antimicrobial peptides. Front Immunol 2024; 15:1191966. [PMID: 38655253 PMCID: PMC11035819 DOI: 10.3389/fimmu.2024.1191966] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2023] [Accepted: 02/23/2024] [Indexed: 04/26/2024] Open
Abstract
NK-lysin is a potent antimicrobial peptide (AMP) with antimicrobial activity against bacteria, fungi, viruses, and parasites. NK-lysin is a type of granulysin, a member of the saposin-like proteins family first isolated from a pig's small intestine. In previous work, for the first time, we identified four variants of nk-lysin from Atlantic salmon (Salmo salar) using EST sequences. In the present study, we reported and characterized two additional transcripts of NK-lysin from S. salar. Besides, we evaluated the tissue distribution of three NK-lysins from S. salar and assessed the antimicrobial, hemolytic, and immunomodulatory activities and signaling pathways of three NK-lysin-derived peptides. The synthetic peptides displayed antimicrobial activity against Piscirickettsia salmonis (LF-89) and Flavobacterium psychrophilum. These peptides induced the expression of immune genes related to innate and adaptive immune responses in vitro and in vivo. The immunomodulatory activity of the peptides involves the mitogen-activated protein kinases-mediated signaling pathway, including p38, extracellular signal-regulated kinase 1/2, and/or c-Jun N-terminal kinases. Besides, the peptides modulated the immune response induced by pathogen-associated molecular patterns (PAMPs). Our findings show that NK-lysin could be a highly effective immunostimulant or vaccine adjuvant for use in fish aquaculture.
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Affiliation(s)
- Leonardo Ortega
- Laboratorio de Biotecnología y Biofármacos, Departamento de Fisiopatología, Facultad de Ciencias Biológicas, Universidad de Concepción, Concepción, Chile
| | - Crisleri Carrera
- Laboratorio de Biotecnología y Biofármacos, Departamento de Fisiopatología, Facultad de Ciencias Biológicas, Universidad de Concepción, Concepción, Chile
| | - Carolina Muñoz-Flores
- Laboratorio de Biotecnología y Biofármacos, Departamento de Fisiopatología, Facultad de Ciencias Biológicas, Universidad de Concepción, Concepción, Chile
| | - Santiago Salazar
- Laboratorio de Biotecnología y Biofármacos, Departamento de Fisiopatología, Facultad de Ciencias Biológicas, Universidad de Concepción, Concepción, Chile
| | - Milton F. Villegas
- Laboratorio de Biotecnología y Biofármacos, Departamento de Fisiopatología, Facultad de Ciencias Biológicas, Universidad de Concepción, Concepción, Chile
| | - María F. Starck
- Laboratorio de Biotecnología y Biofármacos, Departamento de Fisiopatología, Facultad de Ciencias Biológicas, Universidad de Concepción, Concepción, Chile
| | - Ariel Valenzuela
- Laboratorio de Piscicultura y Patología Acuática, Departamento de Oceanografía, Facultad de Ciencias Naturales y Oceanográficas, Universidad de Concepción, Concepción, Chile
| | - Niza Agurto
- Laboratorio de Piscicultura y Patología Acuática, Departamento de Oceanografía, Facultad de Ciencias Naturales y Oceanográficas, Universidad de Concepción, Concepción, Chile
| | - Raquel Montesino
- Laboratorio de Biotecnología y Biofármacos, Departamento de Fisiopatología, Facultad de Ciencias Biológicas, Universidad de Concepción, Concepción, Chile
| | - Allisson Astuya
- Laboratorio de Genómica Marina y Cultivo Celular, Departamento de Oceanografía y Centro de Investigación Oceanográfica en el Pacífico Sur Oriental (COPAS) Sur-Austral, Facultad de Ciencias Naturales y Oceanográficas, Universidad de Concepción, Concepción, Chile
| | - Natalie Parra
- Laboratorio de Biotecnología y Biofármacos, Departamento de Fisiopatología, Facultad de Ciencias Biológicas, Universidad de Concepción, Concepción, Chile
| | - Ercilia T. Pérez
- Laboratorio de Inmunología y Estrés de Organismos Acuáticos, Instituto de Patología Animal, Facultad de Ciencias Veterinarias, Universidad Austral de Chile, Valdivia, Chile
- Centro Fondo de Financiamiento de Centros de Investigación en Áreas Prioritarias (FONDAP), Interdisciplinary Center for Aquaculture Research (INCAR), Universidad de Concepción, Concepción, Chile
| | - Natacha Santibáñez
- Laboratorio de Inmunología y Estrés de Organismos Acuáticos, Instituto de Patología Animal, Facultad de Ciencias Veterinarias, Universidad Austral de Chile, Valdivia, Chile
- Centro Fondo de Financiamiento de Centros de Investigación en Áreas Prioritarias (FONDAP), Interdisciplinary Center for Aquaculture Research (INCAR), Universidad de Concepción, Concepción, Chile
| | - Alex Romero
- Laboratorio de Inmunología y Estrés de Organismos Acuáticos, Instituto de Patología Animal, Facultad de Ciencias Veterinarias, Universidad Austral de Chile, Valdivia, Chile
- Centro Fondo de Financiamiento de Centros de Investigación en Áreas Prioritarias (FONDAP), Interdisciplinary Center for Aquaculture Research (INCAR), Universidad de Concepción, Concepción, Chile
| | - Pamela Ruíz
- Departamento de Ciencias Biológicas, Facultad de Ciencias de la Vida, Universidad Andrés Bello, Talcahuano, Chile
| | - Emilio Lamazares
- Laboratorio de Biotecnología y Biofármacos, Departamento de Fisiopatología, Facultad de Ciencias Biológicas, Universidad de Concepción, Concepción, Chile
| | - Fátima Reyes
- Laboratorio de Biofármacos Recombinantes, Departamento de Farmacología, Facultad de Ciencias Biológicas, Universidad de Concepción, Concepción, Chile
| | - Oliberto Sánchez
- Laboratorio de Biofármacos Recombinantes, Departamento de Farmacología, Facultad de Ciencias Biológicas, Universidad de Concepción, Concepción, Chile
| | - Jorge R. Toledo
- Laboratorio de Biotecnología y Biofármacos, Departamento de Fisiopatología, Facultad de Ciencias Biológicas, Universidad de Concepción, Concepción, Chile
| | - Jannel Acosta
- Laboratorio de Biotecnología y Biofármacos, Departamento de Fisiopatología, Facultad de Ciencias Biológicas, Universidad de Concepción, Concepción, Chile
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Vásquez-Suárez A, Muñoz-Flores C, Ortega L, Roa F, Castillo C, Romero A, Parra N, Sandoval F, Macaya L, González-Chavarría I, Astuya A, Starck MF, Villegas MF, Agurto N, Montesino R, Sánchez O, Valenzuela A, Toledo JR, Acosta J. Design and functional characterization of Salmo salar TLR5 agonist peptides derived from high mobility group B1 acidic tail. Fish Shellfish Immunol 2024; 146:109373. [PMID: 38272332 DOI: 10.1016/j.fsi.2024.109373] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/18/2023] [Revised: 12/21/2023] [Accepted: 01/10/2024] [Indexed: 01/27/2024]
Abstract
Toll-like receptor 5 (TLR5) responds to the monomeric form of flagellin and induces the MyD88-depending signaling pathway, activating proinflammatory transcription factors such as NF-κB and the consequent induction of cytokines. On the other hand, HMGB1 is a highly conserved non-histone chromosomal protein shown to interact with and activate TLR5. The present work aimed to design and characterize TLR5 agonist peptides derived from the acidic tail of Salmo salar HMGB1 based on the structural knowledge of the TLR5 surface using global molecular docking platforms. Peptide binding poses complexed on TLR5 ectodomain model from each algorithm were filtrated based on docking scoring functions and predicted theoretical binding affinity of the complex. Circular dichroism spectra were recorded for each peptide selected for synthesis. Only intrinsically disordered peptides (6W, 11W, and SsOri) were selected for experimental functional assay. The functional characterization of the peptides was performed by NF-κB activation assays, RT-qPCR gene expression assays, and Piscirickettsia salmonis challenge in SHK-1 cells. The 6W and 11W peptides increased the nuclear translation of p65 and phosphorylation. In addition, the peptides induced the expression of genes related to the TLR5 pathway activation, pro- and anti-inflammatory response, and differentiation and activation of T lymphocytes towards phenotypes such as TH1, TH17, and TH2. Finally, it was shown that the 11W peptide protects immune cells against infection with P. salmonis bacteria. Overall, the results indicate the usefulness of novel peptides as potential immunostimulants in salmonids.
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Affiliation(s)
- Aleikar Vásquez-Suárez
- Laboratorio de Biotecnología y Biofármacos, Departamento de Fisiopatología, Facultad de Ciencias Biológicas, Universidad de Concepción, Concepción, Chile
| | - Carolina Muñoz-Flores
- Laboratorio de Biotecnología y Biofármacos, Departamento de Fisiopatología, Facultad de Ciencias Biológicas, Universidad de Concepción, Concepción, Chile
| | - Leonardo Ortega
- Laboratorio de Biotecnología y Biofármacos, Departamento de Fisiopatología, Facultad de Ciencias Biológicas, Universidad de Concepción, Concepción, Chile
| | - Francisco Roa
- Laboratorio de Biotecnología y Biofármacos, Departamento de Fisiopatología, Facultad de Ciencias Biológicas, Universidad de Concepción, Concepción, Chile
| | - Carolina Castillo
- Laboratorio de Biotecnología y Biofármacos, Departamento de Fisiopatología, Facultad de Ciencias Biológicas, Universidad de Concepción, Concepción, Chile
| | - Alex Romero
- Laboratorio de Inmunología y Estrés de Organismos Acuáticos, Instituto de Patología Animal, Facultad de Ciencias Veterinarias, Universidad Austral de Chile, Valdivia, Chile; Centro FONDAP, Interdisciplinary Center for Aquaculture Research (INCAR), Universidad de Concepción, Concepción, Chile
| | - Natalie Parra
- Laboratorio de Biotecnología y Biofármacos, Departamento de Fisiopatología, Facultad de Ciencias Biológicas, Universidad de Concepción, Concepción, Chile
| | - Felipe Sandoval
- Laboratorio de Biotecnología y Biofármacos, Departamento de Fisiopatología, Facultad de Ciencias Biológicas, Universidad de Concepción, Concepción, Chile
| | - Luis Macaya
- Departamento de Físico-Química, Facultad de Ciencias Químicas, Universidad de Concepción, Concepción, Chile
| | - Iván González-Chavarría
- Laboratorio de Biotecnología y Biofármacos, Departamento de Fisiopatología, Facultad de Ciencias Biológicas, Universidad de Concepción, Concepción, Chile
| | - Allisson Astuya
- Laboratorio de Genómica Marina y Cultivo Celular, Departamento de Oceanografía y COPAS Sur-Austral, Facultad de Ciencias Naturales y Oceanográficas, Universidad de Concepción, Concepción, Chile
| | - María Francisca Starck
- Laboratorio de Biotecnología y Biofármacos, Departamento de Fisiopatología, Facultad de Ciencias Biológicas, Universidad de Concepción, Concepción, Chile
| | - Milton F Villegas
- Laboratorio de Biotecnología y Biofármacos, Departamento de Fisiopatología, Facultad de Ciencias Biológicas, Universidad de Concepción, Concepción, Chile
| | - Niza Agurto
- Laboratorio de Piscicultura y Patología Acuática, Departamento de Oceanografía, Facultad de Ciencias Naturales y Oceanográficas, Universidad de Concepción, Concepción, Chile
| | - Raquel Montesino
- Laboratorio de Biotecnología y Biofármacos, Departamento de Fisiopatología, Facultad de Ciencias Biológicas, Universidad de Concepción, Concepción, Chile
| | - Oliberto Sánchez
- Laboratorio de Biofármacos Recombinantes, Departamento de Farmacología, Facultad de Ciencias Biológicas, Universidad de Concepción, Concepción, Chile
| | - Ariel Valenzuela
- Laboratorio de Piscicultura y Patología Acuática, Departamento de Oceanografía, Facultad de Ciencias Naturales y Oceanográficas, Universidad de Concepción, Concepción, Chile
| | - Jorge R Toledo
- Laboratorio de Biotecnología y Biofármacos, Departamento de Fisiopatología, Facultad de Ciencias Biológicas, Universidad de Concepción, Concepción, Chile.
| | - Jannel Acosta
- Laboratorio de Biotecnología y Biofármacos, Departamento de Fisiopatología, Facultad de Ciencias Biológicas, Universidad de Concepción, Concepción, Chile.
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Muñoz-Flores C, Roa FJ, Saavedra P, Fuentealba P, Starck MF, Ortega L, Montesino R, Valenzuela A, Astuya A, Parra N, González-Chavarría I, Sánchez O, Toledo JR, Acosta J. Immunomodulatory role of vasoactive intestinal peptide and ghrelin in Oncorhynchus mykiss. Heliyon 2023; 9:e23215. [PMID: 38149209 PMCID: PMC10750074 DOI: 10.1016/j.heliyon.2023.e23215] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2023] [Revised: 11/21/2023] [Accepted: 11/29/2023] [Indexed: 12/28/2023] Open
Abstract
Neuropeptides are a group of peptides derived from precursor proteins synthesized in neuronal and nonneuronal cells. The classical functions of neuropeptides have been extensively studied in mammals, including neuromodulation in the central nervous system, molecular signaling in the peripheral nervous system, and immunomodulation associated mainly with anti-inflammatory activity. In contrast, in teleosts, studies of the immunomodulatory function of these neuropeptides are limited. In Oncorhynchus mykiss, vasoactive intestinal peptide (VIP) mRNA sequences have not been cloned, and the role of VIP in modulating the immune system has not been studied. Furthermore, in relation to other neuropeptides with possible immunomodulatory function, such as ghrelin, there are also few studies. Therefore, in this work, we performed molecular cloning, identification, and phylogenetic analysis of three VIP precursor sequences (prepro-VIP1, VIP2 and VIP3) in rainbow trout. In addition, the immunomodulatory function of both neuropeptides was evaluated in an in vitro model using the VIP1 sequence identified in this work and a ghrelin sequence already studied in O. mykiss. The results suggest that the prepro-VIP2 sequence has the lowest percentage of identity with respect to the other homologous sequences and is more closely related to mammalian orthologous sequences. VIP1 induces significant expression of both pro-inflammatory (IFN-γ, IL-1β) and anti-inflammatory (IL-10 and TGF-β) cytokines, whereas ghrelin only induces significant expression of proinflammatory cytokines such as IL-6 and TNF-α.
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Affiliation(s)
- Carolina Muñoz-Flores
- Laboratorio de Biotecnología y Biofármacos, Departamento de Fisiopatología, Facultad de Ciencias Biológicas, Universidad de Concepción, Víctor Lamas 1290, P.O. Box 160-C, Concepción, Chile
| | - Francisco J. Roa
- Laboratorio de Biotecnología y Biofármacos, Departamento de Fisiopatología, Facultad de Ciencias Biológicas, Universidad de Concepción, Víctor Lamas 1290, P.O. Box 160-C, Concepción, Chile
| | - Paulina Saavedra
- Laboratorio de Biotecnología y Biofármacos, Departamento de Fisiopatología, Facultad de Ciencias Biológicas, Universidad de Concepción, Víctor Lamas 1290, P.O. Box 160-C, Concepción, Chile
| | - Pablo Fuentealba
- Laboratorio de Biotecnología y Biofármacos, Departamento de Fisiopatología, Facultad de Ciencias Biológicas, Universidad de Concepción, Víctor Lamas 1290, P.O. Box 160-C, Concepción, Chile
| | - María F. Starck
- Laboratorio de Biotecnología y Biofármacos, Departamento de Fisiopatología, Facultad de Ciencias Biológicas, Universidad de Concepción, Víctor Lamas 1290, P.O. Box 160-C, Concepción, Chile
| | - Leonardo Ortega
- Laboratorio de Biotecnología y Biofármacos, Departamento de Fisiopatología, Facultad de Ciencias Biológicas, Universidad de Concepción, Víctor Lamas 1290, P.O. Box 160-C, Concepción, Chile
| | - Raquel Montesino
- Laboratorio de Biotecnología y Biofármacos, Departamento de Fisiopatología, Facultad de Ciencias Biológicas, Universidad de Concepción, Víctor Lamas 1290, P.O. Box 160-C, Concepción, Chile
| | - Ariel Valenzuela
- Laboratorio de Piscicultura y Patología Acuática, Departamento de Oceanografía, Facultad de Ciencias Naturales y Oceanográficas, Universidad de Concepción, Victor Lamas 1290, P.O. Box 160-C, Concepción, Chile
| | - Allisson Astuya
- Laboratorio de Genómica Marina y Cultivo Celular, Departamento de Oceanografía y COPAS Sur-Austral, Facultad de Ciencias Naturales y Oceanográficas, Universidad de Concepción, Victor Lamas 1290, P.O. Box 160-C, Concepción, Chile
| | - Natalie Parra
- Laboratorio de Biotecnología y Biofármacos, Departamento de Fisiopatología, Facultad de Ciencias Biológicas, Universidad de Concepción, Víctor Lamas 1290, P.O. Box 160-C, Concepción, Chile
| | - Iván González-Chavarría
- Laboratorio de Biotecnología y Biofármacos, Departamento de Fisiopatología, Facultad de Ciencias Biológicas, Universidad de Concepción, Víctor Lamas 1290, P.O. Box 160-C, Concepción, Chile
| | - Oliberto Sánchez
- Laboratorio de Biofármacos Recombinantes, Departamento de Farmacología, Facultad de Ciencias Biológicas, Universidad de Concepción, Víctor Lamas 1290, P.O. Box 160-C, Concepción, Chile
| | - Jorge R. Toledo
- Laboratorio de Biotecnología y Biofármacos, Departamento de Fisiopatología, Facultad de Ciencias Biológicas, Universidad de Concepción, Víctor Lamas 1290, P.O. Box 160-C, Concepción, Chile
| | - Jannel Acosta
- Laboratorio de Biotecnología y Biofármacos, Departamento de Fisiopatología, Facultad de Ciencias Biológicas, Universidad de Concepción, Víctor Lamas 1290, P.O. Box 160-C, Concepción, Chile
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Muñoz-Flores C, González-Chavarría I, Sandoval F, Roa FJ, Palacios P, Astuya A, Fernández K, Altamirano C, Romero A, Acosta J, Toledo JR. New strategy for the design, production and pre-purification of chimeric peptide with immunomodulatory activity in Salmosalar. Fish Shellfish Immunol 2022; 125:120-127. [PMID: 35537671 DOI: 10.1016/j.fsi.2022.04.034] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/06/2021] [Revised: 03/10/2022] [Accepted: 04/21/2022] [Indexed: 06/14/2023]
Abstract
The intensive salmon farming is associated with massive outbreaks of infections. The use of antibiotics for their prevention and control is related to damage to the environment and human health. Antimicrobial peptides (AMPs) have been proposed as an alternative to the use of antibiotics for their antimicrobial and immunomodulatory activities. However, one of the main challenges for its massive clinical application is the high production cost and the complexity of chemical synthesis. Thus, recombinant DNA technology offers a more sustainable, scalable, and profitable option. In the present study, using an AMPs function prediction methodology, we designed a chimeric peptide consisting of sequences derived from cathelicidin fused with the immunomodulatory peptide derived from flagellin. The designed peptide, CATH-FLA was produced by recombinant expression using an easy pre-purification system. The chimeric peptide was able to induce IL-1β and IL-8 expression in Salmo salar head kidney leukocytes, and prevented Piscirickettsia salmonis-induced cytotoxicity in SHK-1 cells. These results suggest that pre-purification of a recombinant AMP-based chimeric peptide designed in silico allow obtaining a peptide with immunomodulatory activity in vitro. This could solve the main obstacle of AMPs for massive clinical applications.
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Affiliation(s)
- Carolina Muñoz-Flores
- Biotechnology and Biopharmaceuticals Laboratory, Departamento de Fisiopatología, Facultad de Ciencias Biológicas, Universidad de Concepción. Víctor Lamas 1290, P.O. Box 160-C, Concepción, Chile
| | - Iván González-Chavarría
- Biotechnology and Biopharmaceuticals Laboratory, Departamento de Fisiopatología, Facultad de Ciencias Biológicas, Universidad de Concepción. Víctor Lamas 1290, P.O. Box 160-C, Concepción, Chile
| | - Felipe Sandoval
- Biotechnology and Biopharmaceuticals Laboratory, Departamento de Fisiopatología, Facultad de Ciencias Biológicas, Universidad de Concepción. Víctor Lamas 1290, P.O. Box 160-C, Concepción, Chile
| | - Francisco J Roa
- Biotechnology and Biopharmaceuticals Laboratory, Departamento de Fisiopatología, Facultad de Ciencias Biológicas, Universidad de Concepción. Víctor Lamas 1290, P.O. Box 160-C, Concepción, Chile
| | - Paulo Palacios
- Salmones Antártica S.A., Camino Los Ángeles, Santa Bárbara, Km. 12,8, BioBio, Chile
| | - Allisson Astuya
- Laboratory of Cell Culture and Marine Genomics, Department of Oceanography and COPAS Sur-Austral, Faculty of Natural and Oceanographic Science, Universidad de Concepción, Victor Lamas 1290, P.O. Box 160-C, Concepción, Chile
| | - Khaterina Fernández
- Laboratory of Biomaterials, Department of Chemical Engineering, Faculty of Engineering, Universidad de Concepción. Victor Lamas 1290, P.O. Box 160-C, Concepción, Chile
| | - Claudia Altamirano
- Laboratorio de Cultivos Celulares, Escuela de Ingeniería Bioquímica, Pontificia Universidad Católica de Valparaíso, 2362803, Valparaíso, Chile
| | - Alex Romero
- Centro FONDAP, Interdisciplinary Center for Aquaculture Research (INCAR), Chile; Instituto de Patología Animal, Universidad Austral de Chile, Valdivia, Chile
| | - Jannel Acosta
- Biotechnology and Biopharmaceuticals Laboratory, Departamento de Fisiopatología, Facultad de Ciencias Biológicas, Universidad de Concepción. Víctor Lamas 1290, P.O. Box 160-C, Concepción, Chile
| | - Jorge R Toledo
- Biotechnology and Biopharmaceuticals Laboratory, Departamento de Fisiopatología, Facultad de Ciencias Biológicas, Universidad de Concepción. Víctor Lamas 1290, P.O. Box 160-C, Concepción, Chile.
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5
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Tapia C, López B, Astuya A, Becerra J, Gugliandolo C, Parra B, Martínez M. Antiproliferative activity of carotenoid pigments produced by extremophile bacteria. Nat Prod Res 2019; 35:4638-4642. [PMID: 31809588 DOI: 10.1080/14786419.2019.1698574] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Various microorganisms are able to synthesize pigments, which usually present antioxidant properties. The aim of this work was to evaluate the antiproliferative activity of bacterial pigments against cancer cells Neuro-2a, Saos-2 and MCF-7. Pigments were obtained from Deinococcus sp. UDEC-P1 and Arthrobacter sp. UDEC-A13. Both bacterial strains were isolated from cold environments (Patagonia and Antarctica, respectively). Pigments were purified and analyzed by HPLC. Antiproliferative activity was evaluated by 3-4,5-dimethylthiazol-2-yl-2,5-diphenyltetrazolium (MTT) assay. Deinoxanthin carotenoid obtained from Deinococcus sp. UDEC-P1 was able to reduce significatively the viability of Saos-2 (37.1%), while no effect was observed against MCF-7 and Neuro-2a. Pigments obtained from Arthrobacter sp. UDEC-A13 showed a significant viability reduction of three tumour cells (20.6% Neuro-2a, 26.3% Saos-2 and 13.2% MCF-7). Therefore, carotenoid pigments produced by extremophilic bacteria Deinococcus sp. UDEC-P1 and Arthrobacter sp. UDEC-A13 could be proposed as novel complementary compounds in anticancer chemotherapy.
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Affiliation(s)
- Cristian Tapia
- Department of Microbiology, Faculty of Biological Sciences, University of Concepcion, Chile
| | - Bárbara López
- Department of Oceanography, Faculty of Natural and Oceanographic Sciences, Sur-Austral COPAS Program, University of Concepcion, Chile
| | - Allisson Astuya
- Department of Oceanography, Faculty of Natural and Oceanographic Sciences, Sur-Austral COPAS Program, University of Concepcion, Chile
| | - José Becerra
- Department of Botany, Faculty of Natural and Oceanographic Sciences, University of Concepcion, Chile
| | - Concetta Gugliandolo
- Department of Chemical, Biological, Pharmaceutical and Environmental Sciences, Research Center for Extreme Environments and Extremophiles, University of Messina, Messina, Italy
| | - Boris Parra
- Department of Microbiology, Faculty of Biological Sciences, University of Concepcion, Chile
| | - Miguel Martínez
- Department of Microbiology, Faculty of Biological Sciences, University of Concepcion, Chile
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Aballay-González A, Gallardo-Rodriguez JJ, Silva-Higuera M, Rivera A, Ulloa V, Delgado-Rivera L, Rivera-Belmar A, Astuya A. Neuro-2a cell-based assay for toxicity equivalency factor - proposal and evaluation in Chilean contaminated shellfish samples. Food Addit Contam Part A Chem Anal Control Expo Risk Assess 2019; 37:162-173. [DOI: 10.1080/19440049.2019.1676919] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Affiliation(s)
- Ambbar Aballay-González
- Laboratorio de Biotoxinas UdeC, Departamento de Oceanografía, Facultad de Ciencias Naturales y Oceanográficas, Universidad de Concepción, Concepción, Chile
- Centro de Investigación Oceanográfica COPAS Sur-Austral, Universidad de Concepción, Concepción, Chile
| | | | - Macarena Silva-Higuera
- Laboratorio de Biotoxinas UdeC, Departamento de Oceanografía, Facultad de Ciencias Naturales y Oceanográficas, Universidad de Concepción, Concepción, Chile
- Centro de Investigación Oceanográfica COPAS Sur-Austral, Universidad de Concepción, Concepción, Chile
| | - Alejandra Rivera
- Laboratorio de Biotoxinas UdeC, Departamento de Oceanografía, Facultad de Ciencias Naturales y Oceanográficas, Universidad de Concepción, Concepción, Chile
- Centro de Investigación Oceanográfica COPAS Sur-Austral, Universidad de Concepción, Concepción, Chile
| | - Viviana Ulloa
- Laboratorio de Biotoxinas UdeC, Departamento de Oceanografía, Facultad de Ciencias Naturales y Oceanográficas, Universidad de Concepción, Concepción, Chile
| | - Lorena Delgado-Rivera
- Laboratorio de Toxinas Marinas y Micotoxinas, Sección de Química de Alimentos, Departamento de Salud Ambiental, Instituto de Salud Pública de Chile, Ñuñoa, Chile
| | - Andrea Rivera-Belmar
- Departamento de Alimentación y Nutrición, División de Salud y Política Pública, Subsecretaría de Salud Pública, Ministerio de Salud, Santiago, Chile
| | - Allisson Astuya
- Laboratorio de Biotoxinas UdeC, Departamento de Oceanografía, Facultad de Ciencias Naturales y Oceanográficas, Universidad de Concepción, Concepción, Chile
- Centro de Investigación Oceanográfica COPAS Sur-Austral, Universidad de Concepción, Concepción, Chile
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7
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Olivares-Ferretti P, Hernandez K, Peredo-Parada M, Chavez V, Carmona E, Astuya A, Parodi J. Polyphenols obtained from Didymosphenia geminata (Lyngbye) Schmith altered the viability and proliferation of salmonids cells lines SHK-1 and CHSE-214. Aquat Toxicol 2019; 211:141-147. [PMID: 30981037 DOI: 10.1016/j.aquatox.2019.03.022] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/14/2019] [Revised: 03/29/2019] [Accepted: 03/30/2019] [Indexed: 06/09/2023]
Abstract
Didymosphenia geminata (Lyngbye) Schmidt, also referred to as Didymo, is an invasive diatom that forms nuisance mats. Since it was first reported in our country in approximately 2010, Didymo has expanded and colonized different rivers in the Zona Austral region of Chile. Its biology and effects on ecosystems are still being studied because Didymo is an invasive algal mat that forms in a range of systems from oligotrophic austral rivers to more subtropical systems. We aimed to evaluate the viability of two salmonid cell lines, CHSE-214 and SHK-1 (somatic and embryonic cell lines, respectively), in dilutions of river water alone and in river water contaminated with Didymo or polyphenols extracted from Didymo under controlled conditions. We developed an artificial river system (2 aquariums/replicate) from five different rivers from the central area (Bio-Bio) and Patagonia area (Futaleufú) of Chile to maintain Didymo in the benthic phase. The Didymo populations were maintained for six months in the water from the rivers, after which samples were obtained. Following the extraction of polyphenols from the Didymo samples maintained in the artificial rivers, toxicity assays (10 assays) were performed to determine cell viability. Our results indicated that the CHSE-214 cells were highly sensitive to increasing concentrations of Didymo extracts. We observed a 50% reduction in cell viability after 24 h of exposure to a 0.01 V/V dilution, and this treatment further reduced the proliferative capacity by 70% after 120 h. The SHK-1 cells were less responsive, showing only a 20% decrease in viability at 24 h and a lower cell proliferation rate (45%) after 120 h, which remained higher than that of the CHSE-214 cells. We conclude that certain cell types are sensitive to Didymo in rivers, suggesting that there are chronic effects on several aquatic species following exposure to these diatom substances. These effects should be further studied using this laboratory model to understand the full impact of Didymo on river ecosystems.
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Affiliation(s)
- Pamela Olivares-Ferretti
- Center of Excellence in Translational Medicine (CEMT- BIOREN), Preclinical Sciences Department, Faculty of Medicine, Universidad de La Frontera, Temuco, Chile; Doctoral Program in Sciences, Major in Applied Cellular and Molecular Biology, Universidad de La Frontera, Temuco, Chile
| | - Klaudia Hernandez
- Laboratorio Biología Celular y Molecular Aplicada, Facultad de Ciencias, Universidad Mayor, Temuco, Chile
| | - Matías Peredo-Parada
- Plataforma de Investigación en Ecohidrología y Ecohidráulica, EcoHyd Ltda, Chile
| | - Viviana Chavez
- Laboratorio de Investigación y Educación Tonalli Ltda, Chile
| | - Erico Carmona
- Laboratorio de Genotoxicología, Departamento de Procesos Industriales, Facultad de Ingeniería, Universidad Católica de Temuco, Chile
| | - Allisson Astuya
- Laboratory of Cell Culture and Marine Genomics, Marine Biotechnology Unit, Faculty of Natural and Oceanographic Sciences, University of Concepcion and Sur-Austral COPAS Program, University of Concepcion, Casilla 160-C, Concepción, Chile
| | - Jorge Parodi
- Laboratorio Biología Celular y Molecular Aplicada, Facultad de Ciencias, Universidad Mayor, Temuco, Chile.
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8
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Muñoz-Flores C, Astuya A, Roa F, Romero A, Acosta J, Sánchez O, Toledo J. Activation of membrane-bound and soluble Toll-like Receptors 5 in Salmo salar depends on the MyD88 signalling pathway. Biochim Biophys Acta Gen Subj 2018; 1862:2215-2225. [DOI: 10.1016/j.bbagen.2018.07.008] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2018] [Revised: 05/29/2018] [Accepted: 07/06/2018] [Indexed: 01/01/2023]
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9
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Astuya A, Rivera A, Vega-Drake K, Aburto C, Cruzat F, Ulloa V, Caprile T, Gallardo-Rodríguez JJ. Study of the ichthyotoxic microalga Heterosigma akashiwo by transcriptional activation of sublethal marker Hsp70b in Transwell co-culture assays. PLoS One 2018; 13:e0201438. [PMID: 30071073 PMCID: PMC6072012 DOI: 10.1371/journal.pone.0201438] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2018] [Accepted: 07/16/2018] [Indexed: 12/15/2022] Open
Abstract
Despite the advance of knowledge about the factors and potential mechanisms triggering the ichthyotoxicity in microalgae, these remain unclear or are controversial for several species (e.g. Heterosigma). Neither typical toxicity tests carried out with cell extracts nor direct exposure to harmful species were proved suitable to unravel the mechanism of harm. Ichthyotoxic species show a complex harmful effect on fish, which is mediated through various mechanisms depending on the species. In this work, we present a method to study sub-lethal effects triggered by reactive oxygen species of a population of harmful algae in vivo over a fish cell line. To that end, Transwell co-cultures in which causative and target species are separated by a 0.4 μm pore membrane were carried out. This allowed the evaluation of the effect of the released molecules by cells in a rapid and compact test. In our method, the harmful effect was sensed through the transcriptional activation of sub-lethal marker Hsp70b in the CHSE214 salmon cell line. The method was tested with the raphidophyte Heterosigma akashiwo and Dunaliella tertiolecta (as negative control). It was shown that superoxide intracellular content and its release are not linked in these species. The methodology allowed proving that reactive oxygen species produced by H. akashiwo are able to induce the transcriptional activation of sub-lethal marker Hsp70b. However, neither loss of viability nor apoptosis was observed in CHSE214 salmon cell line except when exposed to direct contact with the raphidophyte cells (or their extract). Consequently, ROS was not concluded to be the main cause of ichthyotoxicity in H. akashiwo.
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Affiliation(s)
- Allisson Astuya
- Laboratory of Cell Culture and Marine Genomics, Department of Oceanography, Faculty of Natural and Oceanographic Sciences, University of Concepción, Concepción, Chile
- COPAS Sur-Austral Program, Department of Oceanography, Faculty of Natural and Oceanographic Sciences, University of Concepción, Concepción, Chile
| | - Alejandra Rivera
- Laboratory of Cell Culture and Marine Genomics, Department of Oceanography, Faculty of Natural and Oceanographic Sciences, University of Concepción, Concepción, Chile
- COPAS Sur-Austral Program, Department of Oceanography, Faculty of Natural and Oceanographic Sciences, University of Concepción, Concepción, Chile
| | - Karina Vega-Drake
- Laboratory of Cell Culture and Marine Genomics, Department of Oceanography, Faculty of Natural and Oceanographic Sciences, University of Concepción, Concepción, Chile
| | - Carla Aburto
- Laboratory of Cell Culture and Marine Genomics, Department of Oceanography, Faculty of Natural and Oceanographic Sciences, University of Concepción, Concepción, Chile
- COPAS Sur-Austral Program, Department of Oceanography, Faculty of Natural and Oceanographic Sciences, University of Concepción, Concepción, Chile
| | - Fernando Cruzat
- COPAS Sur-Austral Program, Department of Oceanography, Faculty of Natural and Oceanographic Sciences, University of Concepción, Concepción, Chile
- Laboratory of Proteomics and Genomics of Marine Organisms, Department of Oceanography, Faculty of Natural and Oceanographic Sciences, University of Concepción, Chile
| | - Viviana Ulloa
- Laboratory of Cell Culture and Marine Genomics, Department of Oceanography, Faculty of Natural and Oceanographic Sciences, University of Concepción, Concepción, Chile
| | - Teresa Caprile
- Laboratory of Axon Guidance, Department de Cell Biology, Faculty of Biology, University of Concepción, Concepción, Chile
| | - Juan J. Gallardo-Rodríguez
- Department of Chemical Engineering, Faculty of Engineering, University of Concepción, Concepción, Chile
- * E-mail:
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10
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Pereira-Torres D, Gonçalves AT, Ulloa V, Martínez R, Carrasco H, Olea AF, Espinoza L, Gallardo-Escárate C, Astuya A. In vitro modulation of Drimys winteri bark extract and the active compound polygodial on Salmo salar immune genes after exposure to Saprolegnia parasitica. Fish Shellfish Immunol 2016; 59:103-108. [PMID: 27777106 DOI: 10.1016/j.fsi.2016.10.035] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/25/2016] [Revised: 10/11/2016] [Accepted: 10/18/2016] [Indexed: 06/06/2023]
Abstract
The rapid development of the aquaculture industry has global concerns with health management and control strategies to prevent and/or treat diseases and increase sustainability standards. Saprolegniosis is a disease caused by Saprolegnia parasitica, and is characterized by promoting an immunosuppression in the host. This study evaluated in vitro the extract and one active compound (polygodial) of Drimys winteri, a Chilean medicinal tree as a potential early immunostimulatory aid in Saprolegniosis control. Atlantic salmon (Salmo salar) head kidney cells (ASK-1) were incubated with both extract and pure polygodial before exposure to S. parasitica mycelium, and the expression of the immune-related genes interleukin 1β (IL-1β), interferon α (IFNα), and major histocompatibility complex II (MHCII) was evaluated. Both evidenced immunomodulatory capacities by increasing gene expressions. This immunomodulation related to a mitigatory action counteracting the immunosuppressing effects of S. parasitica. Despite that most immune-related genes were up-regulated, the down-regulation of MHCII, characteristic of S. parasitica infection, was lessened by pre-incubation with the compounds. This study provides the first insight on the potential of D. winteri bark extract as a possible immunomodulatory and defensive strategy against this oomycete infection in fish.
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Affiliation(s)
- D Pereira-Torres
- Laboratory of Cell Culture and Marine Genomics, Department of Oceanography and COPAS Sur-Austral, University of Concepción, Casilla 160-C, Concepción, Chile
| | - A T Gonçalves
- Laboratory of Biotechnology and Aquatic Genomics, Interdisciplinary Center for Aquaculture Research (INCAR), University of Concepción, Casilla 160-C, Concepción, Chile
| | - V Ulloa
- Laboratory of Cell Culture and Marine Genomics, Department of Oceanography and COPAS Sur-Austral, University of Concepción, Casilla 160-C, Concepción, Chile
| | - R Martínez
- Departamento de Química, Facultad de Ciencias Exactas, Universidad Andrés Bello, Quillota 910, Viña del Mar, Chile
| | - H Carrasco
- Instituto de Ciencias Químicas Aplicadas, Facultad de Ingeniería, Universidad Autónoma de Chile, Llano Subercaseaux 2801, San Miguel, Santiago, Chile
| | - A F Olea
- Instituto de Ciencias Químicas Aplicadas, Facultad de Ingeniería, Universidad Autónoma de Chile, Llano Subercaseaux 2801, San Miguel, Santiago, Chile
| | - L Espinoza
- Departamento de Química, Universidad Técnica Federico Santa María, Av. España 1680, Valparaíso, Chile
| | - C Gallardo-Escárate
- Laboratory of Biotechnology and Aquatic Genomics, Interdisciplinary Center for Aquaculture Research (INCAR), University of Concepción, Casilla 160-C, Concepción, Chile
| | - A Astuya
- Laboratory of Cell Culture and Marine Genomics, Department of Oceanography and COPAS Sur-Austral, University of Concepción, Casilla 160-C, Concepción, Chile.
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Torres S, Cajas D, Palfner G, Astuya A, Aballay A, Pérez C, Hernández V, Becerra J. Steroidal composition and cytotoxic activity from fruiting body of Cortinarius xiphidipus. Nat Prod Res 2016; 31:473-476. [DOI: 10.1080/14786419.2016.1185717] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Affiliation(s)
- Solange Torres
- Laboratory of Natural Products Chemistry, Department of Botany, University of Concepción, Concepción, Chile
| | - Daniel Cajas
- Laboratory of Natural Products Chemistry, Department of Botany, University of Concepción, Concepción, Chile
| | - Goetz Palfner
- Laboratory of Mycology and Mycorrhizal, Department of Botany, University of Concepción, Concepción, Chile
| | - Allisson Astuya
- Laboratory of Cellular Culturing and Marine Genomics, Marine Biotechnology Unit and COPAS Sur-Austral Program, University of Concepción, Concepción, Chile
| | - Ambbar Aballay
- Laboratory of Cellular Culturing and Marine Genomics, Marine Biotechnology Unit and COPAS Sur-Austral Program, University of Concepción, Concepción, Chile
| | - Claudia Pérez
- Laboratory of Natural Products Chemistry, Department of Botany, University of Concepción, Concepción, Chile
| | - Víctor Hernández
- Laboratory of Natural Products Chemistry, Department of Botany, University of Concepción, Concepción, Chile
| | - José Becerra
- Laboratory of Natural Products Chemistry, Department of Botany, University of Concepción, Concepción, Chile
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12
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Aballay-Gonzalez A, Ulloa V, Rivera A, Hernández V, Silva M, Caprile T, Delgado-Rivera L, Astuya A. Matrix effects on a cell-based assay used for the detection of paralytic shellfish toxins in bivalve shellfish samples. Food Addit Contam Part A Chem Anal Control Expo Risk Assess 2016; 33:869-75. [DOI: 10.1080/19440049.2016.1166741] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Affiliation(s)
- Ambbar Aballay-Gonzalez
- Laboratory of Cell Culture and Marine Genomics, Marine Biotechnology Unit, Faculty of Natural and Oceanographic Sciences, University of Concepcion, Concepción, Chile
| | - Viviana Ulloa
- Laboratory of Cell Culture and Marine Genomics, Marine Biotechnology Unit, Faculty of Natural and Oceanographic Sciences, University of Concepcion, Concepción, Chile
| | - Alejandra Rivera
- Laboratory of Cell Culture and Marine Genomics, Marine Biotechnology Unit, Faculty of Natural and Oceanographic Sciences, University of Concepcion, Concepción, Chile
- Sur-Austral COPAS Program, University of Concepcion, Concepción, Chile
| | - Víctor Hernández
- Natural Products Chemistry Laboratory, Botanic Department, Natural and Oceanographic Sciences, University of Concepcion, Concepción, Chile
| | - Macarena Silva
- Laboratory of Cell Culture and Marine Genomics, Marine Biotechnology Unit, Faculty of Natural and Oceanographic Sciences, University of Concepcion, Concepción, Chile
| | - Teresa Caprile
- Axon Guidance Laboratory, Department of Cell Biology, Faculty of Biological Sciences, University of Concepcion, Concepción, Chile
| | - Lorena Delgado-Rivera
- Laboratory of Marine Toxins and Mycotoxins, Food Chemistry Section, Environmental Health Department, Institute of Public Health Chile, Ñuñoa, Chile
| | - Allisson Astuya
- Laboratory of Cell Culture and Marine Genomics, Marine Biotechnology Unit, Faculty of Natural and Oceanographic Sciences, University of Concepcion, Concepción, Chile
- Sur-Austral COPAS Program, University of Concepcion, Concepción, Chile
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13
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Sanchez R, Olivares P, Carmona E, Astuya A, Herrera H, Parodi J. Fish Nutrition Additives in SHK-1 Cells: Protective Effects of Silymarin. ACTA ACUST UNITED AC 2016. [DOI: 10.4236/abb.2016.72007] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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14
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Caprile T, Salazar K, Astuya A, Cisternas P, Silva-Alvarez C, Montecinos H, Millán C, García MDLA, Nualart F. The Na+-dependent l-ascorbic acid transporter SVCT2 expressed in brainstem cells, neurons, and neuroblastoma cells is inhibited by flavonoids. J Neurochem 2009; 108:563-77. [DOI: 10.1111/j.1471-4159.2008.05788.x] [Citation(s) in RCA: 50] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
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15
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Astuya A, Caprile T, Castro M, Salazar K, García MDLA, Reinicke K, Rodríguez F, Vera JC, Millán C, Ulloa V, Low M, Martínez F, Nualart F. Vitamin C uptake and recycling among normal and tumor cells from the central nervous system. J Neurosci Res 2005; 79:146-56. [PMID: 15578707 DOI: 10.1002/jnr.20326] [Citation(s) in RCA: 57] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
Specialized cells transport vitamin C in its reduced form using sodium-dependent cotransporters (SVCT1 and SVCT2). Additionally, different cells transport the oxidized form of vitamin C, dehydroascorbic acid, through glucose transporters (GLUTs). We have proposed recently a model for vitamin C uptake that resolves the apparent contradiction that although only ascorbic acid is detectable in vivo, there are cells that transport only dehydroascorbic acid. We carried out a detailed kinetic analysis to compare the mechanisms of vitamin C uptake in normal human melanocytes, neurons isolated from brain cortex, hypothalamic ependymal-glial cells, and astrocytes. Uptake of ascorbic acid was also analyzed in the human oligodendroglioma cell line TC620, in human choroid plexus papilloma cells (HCPPC-1), and in the neuroblastoma cell line Neuro-2a. Melanocytes were used to carry out a detailed analysis of vitamin C uptake. Analysis of the transport data by the Lineweaver-Burk plot revealed the presence of one functional component (K(m) 20 microM) involved in ascorbic acid transport by melanocytes. Vitamin C sodium-dependent saturable uptake was also observed in neurons and hypothalamic tanycytes. We confirmed SVCT2 expression in neurons by in situ hybridization; however, SVCT2 expression was not detected in astrocytes in situ. Functional data indicate that astrocytes transport mainly dehydroascorbic acid, using the glucose transporter GLUT1. Our functional uptake analyses support the hypothesis that astrocytes are involved in vitamin C recycling in the nervous system. This recycling model may work as an efficient system for the salvage of vitamin C by avoiding the hydrolysis of dehydroascorbic acid produced by antioxidative protection.
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MESH Headings
- Animals
- Ascorbic Acid/metabolism
- Ascorbic Acid/pharmacokinetics
- Brain/cytology
- Brain/metabolism
- Brain Neoplasms/pathology
- Cells, Cultured
- Choline/pharmacokinetics
- Cytochalasins/pharmacology
- Dehydroascorbic Acid/metabolism
- Dose-Response Relationship, Drug
- Embryo, Mammalian
- Glial Fibrillary Acidic Protein/metabolism
- Glucose Transporter Type 1
- Humans
- Immunohistochemistry/methods
- In Situ Hybridization/methods
- Melanocytes/metabolism
- Mice
- Mice, Inbred C57BL
- Models, Biological
- Models, Neurological
- Monosaccharide Transport Proteins/metabolism
- Neuroblastoma/pathology
- Neuroglia/metabolism
- Neurons/drug effects
- Neurons/metabolism
- Oligonucleotides, Antisense/pharmacology
- Organic Anion Transporters, Sodium-Dependent/genetics
- Organic Anion Transporters, Sodium-Dependent/metabolism
- RNA, Messenger/biosynthesis
- Rats
- Reverse Transcriptase Polymerase Chain Reaction/methods
- Sodium Chloride/pharmacology
- Sodium-Coupled Vitamin C Transporters
- Symporters/genetics
- Symporters/metabolism
- Temperature
- Time Factors
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Affiliation(s)
- Allisson Astuya
- Departamento de Biología Celular, Facultad de Ciencias Biológicas, Universidad de Concepción, casilla 160C, Concepción, Chile
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16
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Medina RA, Meneses AM, Vera JC, Guzman C, Nualart F, Astuya A, García MA, Kato S, Carvajal A, Pinto M, Owen GI. Estrogen and progesterone up-regulate glucose transporter expression in ZR-75-1 human breast cancer cells. Endocrinology 2003; 144:4527-35. [PMID: 12960090 DOI: 10.1210/en.2003-0294] [Citation(s) in RCA: 38] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Breast cancer incidence increases in women receiving combined estrogen and progesterone therapy. Breast tumors show increased expression of the glucose transporter GLUT1. We determined the effect of these hormones on GLUT1-4 expression and deoxyglucose transport in ZR-75-1 breast cancer cells. Immunoblotting, immunocytochemistry, flow cytometry, and RT-PCR showed that GLUT1 expression is up-regulated by progesterone and, to a greater degree, combined therapy. GLUT2 expression is unaffected by hormonal treatment. GLUT3 protein and RNA is up-regulated by progesterone and combined therapy, and GLUT4 protein expression is up-regulated by all hormonal treatments. Deoxyglucose transport studies revealed the presence of three transport components with characteristics corresponding to GLUT1/4, GLUT2, and GLUT3. 17beta-Estradiol produced a slight increase in transport at the Michaelis constant (Km) corresponding to GLUT3. Progesterone produced a small increase in transport at the Km corresponding to GLUT1/4, and combined 17beta-estradiol and progesterone produced a small increase in transport at the Km corresponding to GLUT3 and a large increase in transport at the Km corresponding to GLUT1/4. This indicates that 17beta-estradiol and progesterone differentially regulate GLUT1-4 expression and that these changes correlate to changes in glucose uptake. We postulate that combined hormone replacement therapy provides a survival advantage to developing ZR-75 breast cancer cells.
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Affiliation(s)
- Rodolfo A Medina
- Laboratorio de Biología Celular y Molecular, Millennium Institute of Fundamental and Applied Biology, Universidad Nacional Andrés Bello, Republica 217, Piso 4, Santiago, Casilla 52164, Chile.
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17
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Castro M, Caprile T, Astuya A, Millán C, Reinicke K, Vera JC, Vásquez O, Aguayo LG, Nualart F. High-affinity sodium-vitamin C co-transporters (SVCT) expression in embryonic mouse neurons. J Neurochem 2001; 78:815-23. [PMID: 11520902 DOI: 10.1046/j.1471-4159.2001.00461.x] [Citation(s) in RCA: 98] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
The sodium-vitamin C co-transporters SVCT1 and SVCT2 transport the reduced form of vitamin C, ascorbic acid. High expression of the SVCT2 has been demonstrated in adult neurons and choroid plexus cells by in situ hybridization. Additionally, embryonic mesencephalic dopaminergic neurons express the SVCT2 transporter. However, there have not been molecular and kinetic analyses addressing the expression of SVCTs in cortical embryonic neurons. In this work, we confirmed the expression of a SVCT2-like transporter in different regions of the fetal mouse brain and in primary cultures of neurons by RT-PCR. Kinetic analysis of the ascorbic acid uptake demonstrated the presence of two affinity constants, 103 microM and 8 microM. A K(m) of 103 microM corresponds to a similar affinity constant reported for SVCT2, while the K(m) of 8 microM might suggest the expression of a very high affinity transporter for ascorbic acid. Our uptake analyses also suggest that neurons take up dehydroascorbic acid, the oxidized form of vitamin C, through the glucose transporters. We consider that the early expression of SVCTs transporters in neurons is important in the uptake of vitamin C, an essential molecule for the fetal brain physiology. Vitamin C that is found at high concentration in fetal brain may function in preventing oxidative free radical damage, because antioxidant radical enzymes mature only late in the developing brain.
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Affiliation(s)
- M Castro
- Department of Embryology, Faculty of Biological Sciences, University of Concepción, Concepción, Chile
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