The inhibitory effect of α-methyl-5-HT on ATP-activated currents in rat dorsal root ganglion neurons
Autor(a) principal: | |
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Data de Publicação: | 2022 |
Outros Autores: | |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Food Science and Technology (Campinas) |
Texto Completo: | http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0101-20612022000100414 |
Resumo: | Abstract The purpose of this study was to explore the inhibitory effect of α-methyl-5- hydroxytryptamine (α-methyl-5-HT) on ATP-activated current (IATP) in rat dorsal root ganglion (DRG) neurons. Whole-cell patch clamp experiment was performed on cultured rat DRG neurons. One minute after treatment with α-methyl-5-HT, ATP (10-4 mol/L) activation current in rat DRG neurons was inhibited. However, this inhibitory effect was independent of the current caused by α-methyl-5-HT. The dose-response curve for IATP showed that α-methyl-5-HT significantly shifted it. The Kd values of ATP-activated currents before and after the pre-addition of α-methyl-5-HT were similar (4.23×10-5 mol/L vs. 6.81×10-5 mol/L). Furthermore, cyproheptadine (10-6 mol/L), an antagonist of 5-HT2 receptor, can reverse the inhibition of α-methyl-5-HT. After intracellular dialysis of KN93 (CaMKII inhibitor) and H7 (PKC inhibitor), this inhibition was also completely eliminated. In conclusion, our results showed that α-methyl-5-HT inhibited ATP-activated current through activating the 5-HT2 receptor and resulting in phosphorylation of the ATP receptor. It was caused by the activation of G protein coupled receptor and corresponding intracellular signaling transduction cascade. |
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Food Science and Technology (Campinas) |
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The inhibitory effect of α-methyl-5-HT on ATP-activated currents in rat dorsal root ganglion neuronsATP-activated currentα-methyl-5-HTDRGAbstract The purpose of this study was to explore the inhibitory effect of α-methyl-5- hydroxytryptamine (α-methyl-5-HT) on ATP-activated current (IATP) in rat dorsal root ganglion (DRG) neurons. Whole-cell patch clamp experiment was performed on cultured rat DRG neurons. One minute after treatment with α-methyl-5-HT, ATP (10-4 mol/L) activation current in rat DRG neurons was inhibited. However, this inhibitory effect was independent of the current caused by α-methyl-5-HT. The dose-response curve for IATP showed that α-methyl-5-HT significantly shifted it. The Kd values of ATP-activated currents before and after the pre-addition of α-methyl-5-HT were similar (4.23×10-5 mol/L vs. 6.81×10-5 mol/L). Furthermore, cyproheptadine (10-6 mol/L), an antagonist of 5-HT2 receptor, can reverse the inhibition of α-methyl-5-HT. After intracellular dialysis of KN93 (CaMKII inhibitor) and H7 (PKC inhibitor), this inhibition was also completely eliminated. In conclusion, our results showed that α-methyl-5-HT inhibited ATP-activated current through activating the 5-HT2 receptor and resulting in phosphorylation of the ATP receptor. It was caused by the activation of G protein coupled receptor and corresponding intracellular signaling transduction cascade.Sociedade Brasileira de Ciência e Tecnologia de Alimentos2022-01-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0101-20612022000100414Food Science and Technology v.42 2022reponame:Food Science and Technology (Campinas)instname:Sociedade Brasileira de Ciência e Tecnologia de Alimentos (SBCTA)instacron:SBCTA10.1590/fst.35620info:eu-repo/semantics/openAccessYANG,HuiminLI,Zhiwangeng2022-02-22T00:00:00Zoai:scielo:S0101-20612022000100414Revistahttp://www.scielo.br/ctaONGhttps://old.scielo.br/oai/scielo-oai.php||revista@sbcta.org.br1678-457X0101-2061opendoar:2022-02-22T00:00Food Science and Technology (Campinas) - Sociedade Brasileira de Ciência e Tecnologia de Alimentos (SBCTA)false |
dc.title.none.fl_str_mv |
The inhibitory effect of α-methyl-5-HT on ATP-activated currents in rat dorsal root ganglion neurons |
title |
The inhibitory effect of α-methyl-5-HT on ATP-activated currents in rat dorsal root ganglion neurons |
spellingShingle |
The inhibitory effect of α-methyl-5-HT on ATP-activated currents in rat dorsal root ganglion neurons YANG,Huimin ATP-activated current α-methyl-5-HT DRG |
title_short |
The inhibitory effect of α-methyl-5-HT on ATP-activated currents in rat dorsal root ganglion neurons |
title_full |
The inhibitory effect of α-methyl-5-HT on ATP-activated currents in rat dorsal root ganglion neurons |
title_fullStr |
The inhibitory effect of α-methyl-5-HT on ATP-activated currents in rat dorsal root ganglion neurons |
title_full_unstemmed |
The inhibitory effect of α-methyl-5-HT on ATP-activated currents in rat dorsal root ganglion neurons |
title_sort |
The inhibitory effect of α-methyl-5-HT on ATP-activated currents in rat dorsal root ganglion neurons |
author |
YANG,Huimin |
author_facet |
YANG,Huimin LI,Zhiwang |
author_role |
author |
author2 |
LI,Zhiwang |
author2_role |
author |
dc.contributor.author.fl_str_mv |
YANG,Huimin LI,Zhiwang |
dc.subject.por.fl_str_mv |
ATP-activated current α-methyl-5-HT DRG |
topic |
ATP-activated current α-methyl-5-HT DRG |
description |
Abstract The purpose of this study was to explore the inhibitory effect of α-methyl-5- hydroxytryptamine (α-methyl-5-HT) on ATP-activated current (IATP) in rat dorsal root ganglion (DRG) neurons. Whole-cell patch clamp experiment was performed on cultured rat DRG neurons. One minute after treatment with α-methyl-5-HT, ATP (10-4 mol/L) activation current in rat DRG neurons was inhibited. However, this inhibitory effect was independent of the current caused by α-methyl-5-HT. The dose-response curve for IATP showed that α-methyl-5-HT significantly shifted it. The Kd values of ATP-activated currents before and after the pre-addition of α-methyl-5-HT were similar (4.23×10-5 mol/L vs. 6.81×10-5 mol/L). Furthermore, cyproheptadine (10-6 mol/L), an antagonist of 5-HT2 receptor, can reverse the inhibition of α-methyl-5-HT. After intracellular dialysis of KN93 (CaMKII inhibitor) and H7 (PKC inhibitor), this inhibition was also completely eliminated. In conclusion, our results showed that α-methyl-5-HT inhibited ATP-activated current through activating the 5-HT2 receptor and resulting in phosphorylation of the ATP receptor. It was caused by the activation of G protein coupled receptor and corresponding intracellular signaling transduction cascade. |
publishDate |
2022 |
dc.date.none.fl_str_mv |
2022-01-01 |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0101-20612022000100414 |
url |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0101-20612022000100414 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
10.1590/fst.35620 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
text/html |
dc.publisher.none.fl_str_mv |
Sociedade Brasileira de Ciência e Tecnologia de Alimentos |
publisher.none.fl_str_mv |
Sociedade Brasileira de Ciência e Tecnologia de Alimentos |
dc.source.none.fl_str_mv |
Food Science and Technology v.42 2022 reponame:Food Science and Technology (Campinas) instname:Sociedade Brasileira de Ciência e Tecnologia de Alimentos (SBCTA) instacron:SBCTA |
instname_str |
Sociedade Brasileira de Ciência e Tecnologia de Alimentos (SBCTA) |
instacron_str |
SBCTA |
institution |
SBCTA |
reponame_str |
Food Science and Technology (Campinas) |
collection |
Food Science and Technology (Campinas) |
repository.name.fl_str_mv |
Food Science and Technology (Campinas) - Sociedade Brasileira de Ciência e Tecnologia de Alimentos (SBCTA) |
repository.mail.fl_str_mv |
||revista@sbcta.org.br |
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1752126331468906496 |