Adipocyte metabolic response to Trypanosoma brucei in a co-culture setting
Autor(a) principal: | |
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Data de Publicação: | 2022 |
Tipo de documento: | Dissertação |
Idioma: | eng |
Título da fonte: | Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
Texto Completo: | http://hdl.handle.net/10362/131417 |
Resumo: | African trypanosomiasis is a vector-borne disease caused by extracellular protozoan parasites, including Trypanosoma brucei. The establishment of infection in mammalian hosts is characterized by invasion of the bloodstream and solid tissues. Among these, the adipose tissue (AT) is heavily colonized by T. brucei in mice. During infection there is also a large reduction of AT mass which suggests the mobilization of lipids stored in the adipocyte. However, it is not known how adipocyte to parasite interactions may contribute to adipocyte lipid metabolism. Here we show that co-culturing 3T3-L1 adipocytes and T. brucei in vitro increased adipocyte lipolysis. We found that this increase can be elicited by a soluble parasite factor, but it is larger when live parasites are in direct contact with adipocytes. Furthermore, chemical inhibition of adipose triglyceride lipase (ATGL) during co-culture lead to a reduction of fatty acid and glycerol release, indicating that the release of lipolytic products in the presence of T. brucei is an ATGL-dependent mechanism. Overall, the findings in this study indicate that T. brucei is able to directly modulate adipocyte catabolism, highlighting the need to further investigate the molecular partners involved in this host-parasite interaction. |
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Adipocyte metabolic response to Trypanosoma brucei in a co-culture settingTrypanosoma bruceiadipose tissuelipolysis3T3-L1 adipocyteDomínio/Área Científica::Ciências Médicas::Outras Ciências MédicasAfrican trypanosomiasis is a vector-borne disease caused by extracellular protozoan parasites, including Trypanosoma brucei. The establishment of infection in mammalian hosts is characterized by invasion of the bloodstream and solid tissues. Among these, the adipose tissue (AT) is heavily colonized by T. brucei in mice. During infection there is also a large reduction of AT mass which suggests the mobilization of lipids stored in the adipocyte. However, it is not known how adipocyte to parasite interactions may contribute to adipocyte lipid metabolism. Here we show that co-culturing 3T3-L1 adipocytes and T. brucei in vitro increased adipocyte lipolysis. We found that this increase can be elicited by a soluble parasite factor, but it is larger when live parasites are in direct contact with adipocytes. Furthermore, chemical inhibition of adipose triglyceride lipase (ATGL) during co-culture lead to a reduction of fatty acid and glycerol release, indicating that the release of lipolytic products in the presence of T. brucei is an ATGL-dependent mechanism. Overall, the findings in this study indicate that T. brucei is able to directly modulate adipocyte catabolism, highlighting the need to further investigate the molecular partners involved in this host-parasite interaction.A tripanossomíase africana é uma doença transmitida por vetores, causada por parasitas protozoários extracelulares, incluindo o Trypanosoma brucei. A infeção do hospedeiro mamífero caracteriza-se pela invasão do sistema circulatório e de outros tecidos. Entre estes encontra-se o tecido adiposo, que é extensamente colonizado por T. brucei em ratinho. Durante a infeção ocorre uma grande redução da massa do tecido adiposo, sugerindo existir mobilização de lípidos armazenados no adipócito. Contudo, não é conhecido como a interação entre o parasita e o adipócito poderá contribuir para o metabolismo de lípidos no adipócito. Neste estudo demonstramos que num sistema in vitro de co-cultura com adipócitos 3T3-L1 e T. brucei existe um aumento da lipólise no adipócito. Este aumento pode ser despoletado por um fator solúvel com origem no parasita, no entanto o seu efeito é máximo quando o parasita está viável e em contato direto com o adipócito. Adicionalmente, a inibição química da ATGL durante a co-cultura resulta numa redução da libertação de ácidos gordos e glicerol, indicando que a lipólise induzida por T. brucei é dependente da atividade da ATGL. Globalmente, os resultados deste estudo indicam que o T. brucei pode modular diretamente o catabolismo do adipócito, realçando a necessidade de investigar os mediadores moleculares envolvidos na interação entre hospedeiro e parasita.Figueiredo, LuísaRUNPereira, Ana Raquel Santos2022-01-212024-11-01T00:00:00Z2022-01-21T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/masterThesisapplication/pdfhttp://hdl.handle.net/10362/131417enginfo:eu-repo/semantics/embargoedAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2024-03-11T05:10:00Zoai:run.unl.pt:10362/131417Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-20T03:47:03.692890Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse |
dc.title.none.fl_str_mv |
Adipocyte metabolic response to Trypanosoma brucei in a co-culture setting |
title |
Adipocyte metabolic response to Trypanosoma brucei in a co-culture setting |
spellingShingle |
Adipocyte metabolic response to Trypanosoma brucei in a co-culture setting Pereira, Ana Raquel Santos Trypanosoma brucei adipose tissue lipolysis 3T3-L1 adipocyte Domínio/Área Científica::Ciências Médicas::Outras Ciências Médicas |
title_short |
Adipocyte metabolic response to Trypanosoma brucei in a co-culture setting |
title_full |
Adipocyte metabolic response to Trypanosoma brucei in a co-culture setting |
title_fullStr |
Adipocyte metabolic response to Trypanosoma brucei in a co-culture setting |
title_full_unstemmed |
Adipocyte metabolic response to Trypanosoma brucei in a co-culture setting |
title_sort |
Adipocyte metabolic response to Trypanosoma brucei in a co-culture setting |
author |
Pereira, Ana Raquel Santos |
author_facet |
Pereira, Ana Raquel Santos |
author_role |
author |
dc.contributor.none.fl_str_mv |
Figueiredo, Luísa RUN |
dc.contributor.author.fl_str_mv |
Pereira, Ana Raquel Santos |
dc.subject.por.fl_str_mv |
Trypanosoma brucei adipose tissue lipolysis 3T3-L1 adipocyte Domínio/Área Científica::Ciências Médicas::Outras Ciências Médicas |
topic |
Trypanosoma brucei adipose tissue lipolysis 3T3-L1 adipocyte Domínio/Área Científica::Ciências Médicas::Outras Ciências Médicas |
description |
African trypanosomiasis is a vector-borne disease caused by extracellular protozoan parasites, including Trypanosoma brucei. The establishment of infection in mammalian hosts is characterized by invasion of the bloodstream and solid tissues. Among these, the adipose tissue (AT) is heavily colonized by T. brucei in mice. During infection there is also a large reduction of AT mass which suggests the mobilization of lipids stored in the adipocyte. However, it is not known how adipocyte to parasite interactions may contribute to adipocyte lipid metabolism. Here we show that co-culturing 3T3-L1 adipocytes and T. brucei in vitro increased adipocyte lipolysis. We found that this increase can be elicited by a soluble parasite factor, but it is larger when live parasites are in direct contact with adipocytes. Furthermore, chemical inhibition of adipose triglyceride lipase (ATGL) during co-culture lead to a reduction of fatty acid and glycerol release, indicating that the release of lipolytic products in the presence of T. brucei is an ATGL-dependent mechanism. Overall, the findings in this study indicate that T. brucei is able to directly modulate adipocyte catabolism, highlighting the need to further investigate the molecular partners involved in this host-parasite interaction. |
publishDate |
2022 |
dc.date.none.fl_str_mv |
2022-01-21 2022-01-21T00:00:00Z 2024-11-01T00:00:00Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/masterThesis |
format |
masterThesis |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://hdl.handle.net/10362/131417 |
url |
http://hdl.handle.net/10362/131417 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/embargoedAccess |
eu_rights_str_mv |
embargoedAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.source.none.fl_str_mv |
reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação instacron:RCAAP |
instname_str |
Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
instacron_str |
RCAAP |
institution |
RCAAP |
reponame_str |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
collection |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
repository.name.fl_str_mv |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
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1799138073928269824 |