The role of adenosine monophosphate-activated protein kinase (AMPK) in the action of modified recombinant extracellular wt (wild-type) ASYN in vitro
Introduction: Alpha-synuclein (ASYN) accumulation is considered to be one of the key factors in Parkinson's disease (PD) pathogenesis. Posttranslational modifications, including oxidation and nitration, can increase aggregation of ASYN. Alterations of adenosine monophosphate-activated protein k...
Main Authors: | , , |
---|---|
Format: | Article |
Language: | English |
Published: |
University of Belgrade, Medical Faculty
2016-01-01
|
Series: | Medicinski Podmladak |
Subjects: | |
Online Access: | http://scindeks-clanci.ceon.rs/data/pdf/0369-1527/2016/0369-15271601051J.pdf |
id |
doaj-b07288eef7084cceac4b4c4e64539667 |
---|---|
record_format |
Article |
spelling |
doaj-b07288eef7084cceac4b4c4e645396672020-11-25T01:45:16ZengUniversity of Belgrade, Medical FacultyMedicinski Podmladak0369-15272466-55252016-01-01671515710.5937/medpodm1601051J0369-15271601051JThe role of adenosine monophosphate-activated protein kinase (AMPK) in the action of modified recombinant extracellular wt (wild-type) ASYN in vitroJeremić Marija0Radeta Ratko1Jovanović Maja2University of Belgrade, Faculty of Medicine, Belgrade, SerbiaUniversity of Belgrade, Faculty of Medicine, Belgrade, SerbiaUniversity of Belgrade, Faculty of Medicine, Belgrade, SerbiaIntroduction: Alpha-synuclein (ASYN) accumulation is considered to be one of the key factors in Parkinson's disease (PD) pathogenesis. Posttranslational modifications, including oxidation and nitration, can increase aggregation of ASYN. Alterations of adenosine monophosphate-activated protein kinase (AMPK) signaling have been shown in several neurodegeneration models, including PD. Aim: The aim of this study was to investigate the role of AMPK in the action of modified recombinant wt (wild-type) ASYN on differentiated SH-SY5Y cells. Materials and methods: All experiments were conducted in all-trans retinoic acid-differentiated human neuroblastoma SH-SY5Y cells, treated with 3 different types of modified recombinant wt ASYN (oligomeric, nitrated and dopamine-modified ASYN). Activation of AMPK and Raptor, together with conversion of LC3-I to LC3-II, were monitored using immunoblotting. Cell viability was assessed using crystal violet assay. Results: Treatment with modified recombinant wt ASYN (oligomeric, nitrated and dopamine-modified ASYN) led to substantial decrease in number of viable differentiated SH-SY5Y cells. Western blot analysis showed decreased levels of AMPK and its downstream kinase Raptor, together with an increase in the conversion of LC3-I to LC3-II, upon treatment with recombinant ASYN. Pharmacological activator of AMPK (AICAR) significantly increased the number of viable cell in the presence of all 3 types of modified recombinant wt ASYN. Conclusion: Modified forms of recombinant wt (wildtype) ASYN (oligomeric, nitrated and dopamine-modified ASYN) induced decrease in number of viable differentiated SH-SY5Y cells, accompanied by inactivation of AMPK/Raptor signalling pathway and autophagy induction. Pharmacological activation of AMPK improved cell survival, indicating a protective role of AMPK in neurotoxicity of extracellular ASYN.http://scindeks-clanci.ceon.rs/data/pdf/0369-1527/2016/0369-15271601051J.pdfmodified recombinant wt ASYNAMPKautophagy |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Jeremić Marija Radeta Ratko Jovanović Maja |
spellingShingle |
Jeremić Marija Radeta Ratko Jovanović Maja The role of adenosine monophosphate-activated protein kinase (AMPK) in the action of modified recombinant extracellular wt (wild-type) ASYN in vitro Medicinski Podmladak modified recombinant wt ASYN AMPK autophagy |
author_facet |
Jeremić Marija Radeta Ratko Jovanović Maja |
author_sort |
Jeremić Marija |
title |
The role of adenosine monophosphate-activated protein kinase (AMPK) in the action of modified recombinant extracellular wt (wild-type) ASYN in vitro |
title_short |
The role of adenosine monophosphate-activated protein kinase (AMPK) in the action of modified recombinant extracellular wt (wild-type) ASYN in vitro |
title_full |
The role of adenosine monophosphate-activated protein kinase (AMPK) in the action of modified recombinant extracellular wt (wild-type) ASYN in vitro |
title_fullStr |
The role of adenosine monophosphate-activated protein kinase (AMPK) in the action of modified recombinant extracellular wt (wild-type) ASYN in vitro |
title_full_unstemmed |
The role of adenosine monophosphate-activated protein kinase (AMPK) in the action of modified recombinant extracellular wt (wild-type) ASYN in vitro |
title_sort |
role of adenosine monophosphate-activated protein kinase (ampk) in the action of modified recombinant extracellular wt (wild-type) asyn in vitro |
publisher |
University of Belgrade, Medical Faculty |
series |
Medicinski Podmladak |
issn |
0369-1527 2466-5525 |
publishDate |
2016-01-01 |
description |
Introduction: Alpha-synuclein (ASYN) accumulation is considered to be one of the key factors in Parkinson's disease (PD) pathogenesis. Posttranslational modifications, including oxidation and nitration, can increase aggregation of ASYN. Alterations of adenosine monophosphate-activated protein kinase (AMPK) signaling have been shown in several neurodegeneration models, including PD. Aim: The aim of this study was to investigate the role of AMPK in the action of modified recombinant wt (wild-type) ASYN on differentiated SH-SY5Y cells. Materials and methods: All experiments were conducted in all-trans retinoic acid-differentiated human neuroblastoma SH-SY5Y cells, treated with 3 different types of modified recombinant wt ASYN (oligomeric, nitrated and dopamine-modified ASYN). Activation of AMPK and Raptor, together with conversion of LC3-I to LC3-II, were monitored using immunoblotting. Cell viability was assessed using crystal violet assay. Results: Treatment with modified recombinant wt ASYN (oligomeric, nitrated and dopamine-modified ASYN) led to substantial decrease in number of viable differentiated SH-SY5Y cells. Western blot analysis showed decreased levels of AMPK and its downstream kinase Raptor, together with an increase in the conversion of LC3-I to LC3-II, upon treatment with recombinant ASYN. Pharmacological activator of AMPK (AICAR) significantly increased the number of viable cell in the presence of all 3 types of modified recombinant wt ASYN. Conclusion: Modified forms of recombinant wt (wildtype) ASYN (oligomeric, nitrated and dopamine-modified ASYN) induced decrease in number of viable differentiated SH-SY5Y cells, accompanied by inactivation of AMPK/Raptor signalling pathway and autophagy induction. Pharmacological activation of AMPK improved cell survival, indicating a protective role of AMPK in neurotoxicity of extracellular ASYN. |
topic |
modified recombinant wt ASYN AMPK autophagy |
url |
http://scindeks-clanci.ceon.rs/data/pdf/0369-1527/2016/0369-15271601051J.pdf |
work_keys_str_mv |
AT jeremicmarija theroleofadenosinemonophosphateactivatedproteinkinaseampkintheactionofmodifiedrecombinantextracellularwtwildtypeasyninvitro AT radetaratko theroleofadenosinemonophosphateactivatedproteinkinaseampkintheactionofmodifiedrecombinantextracellularwtwildtypeasyninvitro AT jovanovicmaja theroleofadenosinemonophosphateactivatedproteinkinaseampkintheactionofmodifiedrecombinantextracellularwtwildtypeasyninvitro AT jeremicmarija roleofadenosinemonophosphateactivatedproteinkinaseampkintheactionofmodifiedrecombinantextracellularwtwildtypeasyninvitro AT radetaratko roleofadenosinemonophosphateactivatedproteinkinaseampkintheactionofmodifiedrecombinantextracellularwtwildtypeasyninvitro AT jovanovicmaja roleofadenosinemonophosphateactivatedproteinkinaseampkintheactionofmodifiedrecombinantextracellularwtwildtypeasyninvitro |
_version_ |
1725024020531773440 |