Effects of Li+ transport and Li+ immobilization on Li+/Mg2+ competition in cells: implications for bipolar disorder
Autor(a) principal: | |
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Data de Publicação: | 2003 |
Outros Autores: | , , , , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
Texto Completo: | http://hdl.handle.net/10316/3871 https://doi.org/10.1016/j.bcp.2003.07.001 |
Resumo: | Li+/Mg2+ competition has been implicated in the therapeutic action of Li+ treatment in bipolar illness. We hypothesized that this competition depended on cell-specific properties. To test this hypothesis, we determined the degree of Li+ transport, immobilization, and Li+/Mg2+ competition in lymphoblastomas, neuroblastomas, and erythrocytes. During a 50 mmol/L Li+-loading incubation, Li+ accumulation at 30 min (mmoles Li+/L cells) was the greatest in lymphoblastomas (11.1±0.3), followed by neuroblastomas (9.3±0.5), and then erythrocytes (4.0±0.5). Li+ binding affinities to the plasma membrane in all three cell types were of the same order of magnitude; however, Li+ immobilization in intact cells was greatest in neuroblastomas and least in erythrocytes. When cells were loaded for 30 min in a 50 mmol/L Li+-containing medium, the percentage increase in free intracellular [Mg2+] in neuroblastoma and lymphoblastoma cells (~55 and ~52%, respectively) was similar, but erythrocytes did not exhibit any substantial increase (~6%). With the intracellular [Li+] at 15 mmol/L, the free intracellular [Mg2+] increased by the greatest amount in neuroblastomas (~158%), followed by lymphoblastomas (~75%), and then erythrocytes (~50%). We conclude that Li+ immobilization and transport are related to free intracellular [Mg2+] and to the extent of Li+/Mg2+ competition in a cell-specific manner. |
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Effects of Li+ transport and Li+ immobilization on Li+/Mg2+ competition in cells: implications for bipolar disorderFluorescenceAtomic absorptionNeuroblastomaLymphoblastomaLi+/Mg2+ competition has been implicated in the therapeutic action of Li+ treatment in bipolar illness. We hypothesized that this competition depended on cell-specific properties. To test this hypothesis, we determined the degree of Li+ transport, immobilization, and Li+/Mg2+ competition in lymphoblastomas, neuroblastomas, and erythrocytes. During a 50 mmol/L Li+-loading incubation, Li+ accumulation at 30 min (mmoles Li+/L cells) was the greatest in lymphoblastomas (11.1±0.3), followed by neuroblastomas (9.3±0.5), and then erythrocytes (4.0±0.5). Li+ binding affinities to the plasma membrane in all three cell types were of the same order of magnitude; however, Li+ immobilization in intact cells was greatest in neuroblastomas and least in erythrocytes. When cells were loaded for 30 min in a 50 mmol/L Li+-containing medium, the percentage increase in free intracellular [Mg2+] in neuroblastoma and lymphoblastoma cells (~55 and ~52%, respectively) was similar, but erythrocytes did not exhibit any substantial increase (~6%). With the intracellular [Li+] at 15 mmol/L, the free intracellular [Mg2+] increased by the greatest amount in neuroblastomas (~158%), followed by lymphoblastomas (~75%), and then erythrocytes (~50%). We conclude that Li+ immobilization and transport are related to free intracellular [Mg2+] and to the extent of Li+/Mg2+ competition in a cell-specific manner.http://www.sciencedirect.com/science/article/B6T4P-49JHRTX-1/1/a707c6f5021c0af8d926e0ee947843b82003info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleaplication/PDFhttp://hdl.handle.net/10316/3871http://hdl.handle.net/10316/3871https://doi.org/10.1016/j.bcp.2003.07.001engBiochemical Pharmacology. 66:10 (2003) 1915-1924Layden, Brian T.Abukhdeir, Abde M.Williams, NicoleFonseca, Carla P.Carroll, LauraCastro, Margarita M. C. A.Geraldes, Carlos F. G. C.Bryant, Fred B.Freitas, Duarte Mota deinfo:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2021-09-01T08:59:47Zoai:estudogeral.uc.pt:10316/3871Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T20:55:42.709430Repositório 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 |
Effects of Li+ transport and Li+ immobilization on Li+/Mg2+ competition in cells: implications for bipolar disorder |
title |
Effects of Li+ transport and Li+ immobilization on Li+/Mg2+ competition in cells: implications for bipolar disorder |
spellingShingle |
Effects of Li+ transport and Li+ immobilization on Li+/Mg2+ competition in cells: implications for bipolar disorder Layden, Brian T. Fluorescence Atomic absorption Neuroblastoma Lymphoblastoma |
title_short |
Effects of Li+ transport and Li+ immobilization on Li+/Mg2+ competition in cells: implications for bipolar disorder |
title_full |
Effects of Li+ transport and Li+ immobilization on Li+/Mg2+ competition in cells: implications for bipolar disorder |
title_fullStr |
Effects of Li+ transport and Li+ immobilization on Li+/Mg2+ competition in cells: implications for bipolar disorder |
title_full_unstemmed |
Effects of Li+ transport and Li+ immobilization on Li+/Mg2+ competition in cells: implications for bipolar disorder |
title_sort |
Effects of Li+ transport and Li+ immobilization on Li+/Mg2+ competition in cells: implications for bipolar disorder |
author |
Layden, Brian T. |
author_facet |
Layden, Brian T. Abukhdeir, Abde M. Williams, Nicole Fonseca, Carla P. Carroll, Laura Castro, Margarita M. C. A. Geraldes, Carlos F. G. C. Bryant, Fred B. Freitas, Duarte Mota de |
author_role |
author |
author2 |
Abukhdeir, Abde M. Williams, Nicole Fonseca, Carla P. Carroll, Laura Castro, Margarita M. C. A. Geraldes, Carlos F. G. C. Bryant, Fred B. Freitas, Duarte Mota de |
author2_role |
author author author author author author author author |
dc.contributor.author.fl_str_mv |
Layden, Brian T. Abukhdeir, Abde M. Williams, Nicole Fonseca, Carla P. Carroll, Laura Castro, Margarita M. C. A. Geraldes, Carlos F. G. C. Bryant, Fred B. Freitas, Duarte Mota de |
dc.subject.por.fl_str_mv |
Fluorescence Atomic absorption Neuroblastoma Lymphoblastoma |
topic |
Fluorescence Atomic absorption Neuroblastoma Lymphoblastoma |
description |
Li+/Mg2+ competition has been implicated in the therapeutic action of Li+ treatment in bipolar illness. We hypothesized that this competition depended on cell-specific properties. To test this hypothesis, we determined the degree of Li+ transport, immobilization, and Li+/Mg2+ competition in lymphoblastomas, neuroblastomas, and erythrocytes. During a 50 mmol/L Li+-loading incubation, Li+ accumulation at 30 min (mmoles Li+/L cells) was the greatest in lymphoblastomas (11.1±0.3), followed by neuroblastomas (9.3±0.5), and then erythrocytes (4.0±0.5). Li+ binding affinities to the plasma membrane in all three cell types were of the same order of magnitude; however, Li+ immobilization in intact cells was greatest in neuroblastomas and least in erythrocytes. When cells were loaded for 30 min in a 50 mmol/L Li+-containing medium, the percentage increase in free intracellular [Mg2+] in neuroblastoma and lymphoblastoma cells (~55 and ~52%, respectively) was similar, but erythrocytes did not exhibit any substantial increase (~6%). With the intracellular [Li+] at 15 mmol/L, the free intracellular [Mg2+] increased by the greatest amount in neuroblastomas (~158%), followed by lymphoblastomas (~75%), and then erythrocytes (~50%). We conclude that Li+ immobilization and transport are related to free intracellular [Mg2+] and to the extent of Li+/Mg2+ competition in a cell-specific manner. |
publishDate |
2003 |
dc.date.none.fl_str_mv |
2003 |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://hdl.handle.net/10316/3871 http://hdl.handle.net/10316/3871 https://doi.org/10.1016/j.bcp.2003.07.001 |
url |
http://hdl.handle.net/10316/3871 https://doi.org/10.1016/j.bcp.2003.07.001 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Biochemical Pharmacology. 66:10 (2003) 1915-1924 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
aplication/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 |
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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) |
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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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1799133843699007488 |