New insights into lipid metabolism of Haematococcus pluvialis in response to high-light stress

Autores
Scodelaro Bilbao, Paola Gabriela; Salvador, Gabriela Alejandra; Leonardi, Patricia Ines
Año de publicación
2018
Idioma
inglés
Tipo de recurso
documento de conferencia
Estado
versión publicada
Descripción
The oleaginous unicellular microalga Haematococcus pluvialis is being intensely studied as a source of carotenoids and lipids with potential biotechnological and biomedical applications. The aim of this study was to analyze the effect of high-light stress on the regulation of triacylglyceride (TAG) and sterol synthesis in H. pluvialis UTEX 2505. After 24 hours of high-light exposure, both lipid classes significantly increased compared to the control condition. As expected, the use of inhibitors of the Kennedy pathway cerulenin, propranolol, xanthohumol and A922500 significantly decreased TAG synthesis under high-light stress, while mevastatin and 25-hydroxycholesterol reduced sterol content. These results were coincident with qPCR and Western blot analyses and also revealed some of the enzymes of H. pluvialis involved in lipid synthesis in response to high-light. In addition, we observed that Kennedy pathway inhibitors yet reduced sterol content while sterol biosynthesis inhibitors also diminished TAG production, denoting a coordination between both synthesis pathways. Fosmidomycin, a specific inhibitor of the non-mevalonate pathway of isoprenoid biosynthesis, reduced total carotenoid content and antioxidant capacity together with TAG and sterol content. Finally, inhibition of carotenoid, TAG and sterol synthesis significantly reduced cell viability suggesting their participation in H. pluvialis survival and adaption to high irradiance. These findings reveal features of lipid synthesis and function of H. pluvialis under high-light stress, and points towards new possible molecular targets to enhance lipid production in microalgae.
Fil: Scodelaro Bilbao, Paola Gabriela. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Centro de Recursos Naturales Renovables de la Zona Semiárida. Universidad Nacional del Sur. Centro de Recursos Naturales Renovables de la Zona Semiárida; Argentina. Universidad Nacional del Sur. Departamento de Biología, Bioquímica y Farmacia; Argentina
Fil: Salvador, Gabriela Alejandra. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Instituto de Investigaciones Bioquímicas de Bahía Blanca. Universidad Nacional del Sur. Instituto de Investigaciones Bioquímicas de Bahía Blanca; Argentina. Universidad Nacional del Sur. Departamento de Biología, Bioquímica y Farmacia; Argentina
Fil: Leonardi, Patricia Ines. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Centro de Recursos Naturales Renovables de la Zona Semiárida. Universidad Nacional del Sur. Centro de Recursos Naturales Renovables de la Zona Semiárida; Argentina. Universidad Nacional del Sur. Departamento de Biología, Bioquímica y Farmacia; Argentina
54th Annual Meeting of the Argentine Society for Biochemistry and Molecular Biology
Paraná
Argentina
Sociedad Argentina de Investigación Bioquímica y Biología Molecular
Materia
MICROALGAE
TRIACYLGLYCERIDES
STEROLS
GREEN ALGAE
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/224036

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spelling New insights into lipid metabolism of Haematococcus pluvialis in response to high-light stressScodelaro Bilbao, Paola GabrielaSalvador, Gabriela AlejandraLeonardi, Patricia InesMICROALGAETRIACYLGLYCERIDESSTEROLSGREEN ALGAEhttps://purl.org/becyt/ford/1.6https://purl.org/becyt/ford/1The oleaginous unicellular microalga Haematococcus pluvialis is being intensely studied as a source of carotenoids and lipids with potential biotechnological and biomedical applications. The aim of this study was to analyze the effect of high-light stress on the regulation of triacylglyceride (TAG) and sterol synthesis in H. pluvialis UTEX 2505. After 24 hours of high-light exposure, both lipid classes significantly increased compared to the control condition. As expected, the use of inhibitors of the Kennedy pathway cerulenin, propranolol, xanthohumol and A922500 significantly decreased TAG synthesis under high-light stress, while mevastatin and 25-hydroxycholesterol reduced sterol content. These results were coincident with qPCR and Western blot analyses and also revealed some of the enzymes of H. pluvialis involved in lipid synthesis in response to high-light. In addition, we observed that Kennedy pathway inhibitors yet reduced sterol content while sterol biosynthesis inhibitors also diminished TAG production, denoting a coordination between both synthesis pathways. Fosmidomycin, a specific inhibitor of the non-mevalonate pathway of isoprenoid biosynthesis, reduced total carotenoid content and antioxidant capacity together with TAG and sterol content. Finally, inhibition of carotenoid, TAG and sterol synthesis significantly reduced cell viability suggesting their participation in H. pluvialis survival and adaption to high irradiance. These findings reveal features of lipid synthesis and function of H. pluvialis under high-light stress, and points towards new possible molecular targets to enhance lipid production in microalgae.Fil: Scodelaro Bilbao, Paola Gabriela. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Centro de Recursos Naturales Renovables de la Zona Semiárida. Universidad Nacional del Sur. Centro de Recursos Naturales Renovables de la Zona Semiárida; Argentina. Universidad Nacional del Sur. Departamento de Biología, Bioquímica y Farmacia; ArgentinaFil: Salvador, Gabriela Alejandra. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Instituto de Investigaciones Bioquímicas de Bahía Blanca. Universidad Nacional del Sur. Instituto de Investigaciones Bioquímicas de Bahía Blanca; Argentina. Universidad Nacional del Sur. Departamento de Biología, Bioquímica y Farmacia; ArgentinaFil: Leonardi, Patricia Ines. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Centro de Recursos Naturales Renovables de la Zona Semiárida. Universidad Nacional del Sur. Centro de Recursos Naturales Renovables de la Zona Semiárida; Argentina. Universidad Nacional del Sur. Departamento de Biología, Bioquímica y Farmacia; Argentina54th Annual Meeting of the Argentine Society for Biochemistry and Molecular BiologyParanáArgentinaSociedad Argentina de Investigación Bioquímica y Biología MolecularTech Science Press2018info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/conferenceObjectReuniónJournalhttp://purl.org/coar/resource_type/c_5794info:ar-repo/semantics/documentoDeConferenciaapplication/pdfapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/224036New insights into lipid metabolism of Haematococcus pluvialis in response to high-light stress; 54th Annual Meeting of the Argentine Society for Biochemistry and Molecular Biology; Paraná; Argentina; 2018; 90-901667-5746CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://www.saib.org.ar/sites/default/files/BIOCELL-SAIB-2018.pdfNacionalinfo:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-03T09:43:37Zoai:ri.conicet.gov.ar:11336/224036instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-09-03 09:43:37.393CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv New insights into lipid metabolism of Haematococcus pluvialis in response to high-light stress
title New insights into lipid metabolism of Haematococcus pluvialis in response to high-light stress
spellingShingle New insights into lipid metabolism of Haematococcus pluvialis in response to high-light stress
Scodelaro Bilbao, Paola Gabriela
MICROALGAE
TRIACYLGLYCERIDES
STEROLS
GREEN ALGAE
title_short New insights into lipid metabolism of Haematococcus pluvialis in response to high-light stress
title_full New insights into lipid metabolism of Haematococcus pluvialis in response to high-light stress
title_fullStr New insights into lipid metabolism of Haematococcus pluvialis in response to high-light stress
title_full_unstemmed New insights into lipid metabolism of Haematococcus pluvialis in response to high-light stress
title_sort New insights into lipid metabolism of Haematococcus pluvialis in response to high-light stress
dc.creator.none.fl_str_mv Scodelaro Bilbao, Paola Gabriela
Salvador, Gabriela Alejandra
Leonardi, Patricia Ines
author Scodelaro Bilbao, Paola Gabriela
author_facet Scodelaro Bilbao, Paola Gabriela
Salvador, Gabriela Alejandra
Leonardi, Patricia Ines
author_role author
author2 Salvador, Gabriela Alejandra
Leonardi, Patricia Ines
author2_role author
author
dc.subject.none.fl_str_mv MICROALGAE
TRIACYLGLYCERIDES
STEROLS
GREEN ALGAE
topic MICROALGAE
TRIACYLGLYCERIDES
STEROLS
GREEN ALGAE
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.6
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv The oleaginous unicellular microalga Haematococcus pluvialis is being intensely studied as a source of carotenoids and lipids with potential biotechnological and biomedical applications. The aim of this study was to analyze the effect of high-light stress on the regulation of triacylglyceride (TAG) and sterol synthesis in H. pluvialis UTEX 2505. After 24 hours of high-light exposure, both lipid classes significantly increased compared to the control condition. As expected, the use of inhibitors of the Kennedy pathway cerulenin, propranolol, xanthohumol and A922500 significantly decreased TAG synthesis under high-light stress, while mevastatin and 25-hydroxycholesterol reduced sterol content. These results were coincident with qPCR and Western blot analyses and also revealed some of the enzymes of H. pluvialis involved in lipid synthesis in response to high-light. In addition, we observed that Kennedy pathway inhibitors yet reduced sterol content while sterol biosynthesis inhibitors also diminished TAG production, denoting a coordination between both synthesis pathways. Fosmidomycin, a specific inhibitor of the non-mevalonate pathway of isoprenoid biosynthesis, reduced total carotenoid content and antioxidant capacity together with TAG and sterol content. Finally, inhibition of carotenoid, TAG and sterol synthesis significantly reduced cell viability suggesting their participation in H. pluvialis survival and adaption to high irradiance. These findings reveal features of lipid synthesis and function of H. pluvialis under high-light stress, and points towards new possible molecular targets to enhance lipid production in microalgae.
Fil: Scodelaro Bilbao, Paola Gabriela. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Centro de Recursos Naturales Renovables de la Zona Semiárida. Universidad Nacional del Sur. Centro de Recursos Naturales Renovables de la Zona Semiárida; Argentina. Universidad Nacional del Sur. Departamento de Biología, Bioquímica y Farmacia; Argentina
Fil: Salvador, Gabriela Alejandra. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Instituto de Investigaciones Bioquímicas de Bahía Blanca. Universidad Nacional del Sur. Instituto de Investigaciones Bioquímicas de Bahía Blanca; Argentina. Universidad Nacional del Sur. Departamento de Biología, Bioquímica y Farmacia; Argentina
Fil: Leonardi, Patricia Ines. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Centro de Recursos Naturales Renovables de la Zona Semiárida. Universidad Nacional del Sur. Centro de Recursos Naturales Renovables de la Zona Semiárida; Argentina. Universidad Nacional del Sur. Departamento de Biología, Bioquímica y Farmacia; Argentina
54th Annual Meeting of the Argentine Society for Biochemistry and Molecular Biology
Paraná
Argentina
Sociedad Argentina de Investigación Bioquímica y Biología Molecular
description The oleaginous unicellular microalga Haematococcus pluvialis is being intensely studied as a source of carotenoids and lipids with potential biotechnological and biomedical applications. The aim of this study was to analyze the effect of high-light stress on the regulation of triacylglyceride (TAG) and sterol synthesis in H. pluvialis UTEX 2505. After 24 hours of high-light exposure, both lipid classes significantly increased compared to the control condition. As expected, the use of inhibitors of the Kennedy pathway cerulenin, propranolol, xanthohumol and A922500 significantly decreased TAG synthesis under high-light stress, while mevastatin and 25-hydroxycholesterol reduced sterol content. These results were coincident with qPCR and Western blot analyses and also revealed some of the enzymes of H. pluvialis involved in lipid synthesis in response to high-light. In addition, we observed that Kennedy pathway inhibitors yet reduced sterol content while sterol biosynthesis inhibitors also diminished TAG production, denoting a coordination between both synthesis pathways. Fosmidomycin, a specific inhibitor of the non-mevalonate pathway of isoprenoid biosynthesis, reduced total carotenoid content and antioxidant capacity together with TAG and sterol content. Finally, inhibition of carotenoid, TAG and sterol synthesis significantly reduced cell viability suggesting their participation in H. pluvialis survival and adaption to high irradiance. These findings reveal features of lipid synthesis and function of H. pluvialis under high-light stress, and points towards new possible molecular targets to enhance lipid production in microalgae.
publishDate 2018
dc.date.none.fl_str_mv 2018
dc.type.none.fl_str_mv info:eu-repo/semantics/publishedVersion
info:eu-repo/semantics/conferenceObject
Reunión
Journal
http://purl.org/coar/resource_type/c_5794
info:ar-repo/semantics/documentoDeConferencia
status_str publishedVersion
format conferenceObject
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/224036
New insights into lipid metabolism of Haematococcus pluvialis in response to high-light stress; 54th Annual Meeting of the Argentine Society for Biochemistry and Molecular Biology; Paraná; Argentina; 2018; 90-90
1667-5746
CONICET Digital
CONICET
url http://hdl.handle.net/11336/224036
identifier_str_mv New insights into lipid metabolism of Haematococcus pluvialis in response to high-light stress; 54th Annual Meeting of the Argentine Society for Biochemistry and Molecular Biology; Paraná; Argentina; 2018; 90-90
1667-5746
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
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https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
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publisher.none.fl_str_mv Tech Science Press
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