Abstract：
:Protectin DX (PDX), which is a novel regulator of 5' adenosine monophosphate-activated protein kinase (AMPK), has recently gained attention for its ability to improve several metabolic diseases. However, the function of PDX in vascular endothelial cells remains unclear. To confirm the protective effects of PDX on endothelial oxidative stress, human umbilical vein endothelial cells (HUVECs) were treated with hydroperoxide (H2O2) and PDX. PDX treatment significantly increased the level of AMPK phosphorylation, and this elevation was attenuated after treatment with G-protein coupled receptor 120 (GPR120) antagonist or GPR120 knockdown. Expressions and activities of antioxidant proteins, including catalase and superoxide dismutase 2 (SOD2), were elevated by PDX and were inhibited by treatment with AMPK inhibitor or with GPR120 antagonist. Production of H2O2-induced reactive oxygen species (ROS), the Bax/Bcl-2 ratio, and the loss of mitochondrial membrane potential were all reversed by PDX, leading to improved cell viability and reduced release of lactate dehydrogenase (LDH). Using flow cytometry, we also found that PDX significantly reduced the H2O2-induced apoptotic population of cells. These protective effects of PDX were all reversed after treatment with AMPK inhibitor or GRP120 antagonist. These results show that the PDX-AMPK axis has a protective role against H2O2-induced oxidative stress in vascular endothelial cells.
journal_name
Cell Signaljournal_title
Cellular signallingauthors
Hwang HJ,Jung TW,Kim JW,Kim JA,Lee YB,Hong SH,Roh E,Choi KM,Baik SH,Yoo HJdoi
10.1016/j.cellsig.2018.09.011subject
Has Abstractpub_date
2019-01-01 00:00:00pages
14-21eissn
0898-6568issn
1873-3913pii
S0898-6568(18)30231-6journal_volume
53pub_type
杂志文章abstract：:Macropinocytosis is an actin-dependent endocytic mechanism mediating internalization of extracellular fluid and associated solutes into cells. The present study was designed to identify the specific protein kinase C (PKC) isoform(s) and downstream effectors regulating actin dynamics during macropinocytosis. We utilize...
journal_title：Cellular signalling
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abstract：:Src homology (SH) 3 domains are small modules found in a diverse array of proteins. The presence of an SH3 domain confers upon its resident protein the ability to interact with specific proline-rich sequences in protein binding partners. A major focus of research has highlighted a role for SH3 domain-mediated interact...
journal_title：Cellular signalling
pub_type： 杂志文章,评审
doi：10.1016/s0898-6568(98)00059-x
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journal_title：Cellular signalling
pub_type： 杂志文章
doi：10.1016/j.cellsig.2008.05.010
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abstract：:Endothelial cell apoptosis induced by hypoxia is implicated in the pathogenesis of vascular diseases. However, the underlying mechanism is not clearly elucidated. In this study, we found that hypoxia increased Mxi1-0 expression, and the Mxi1-0 siRNA could inhibit caspase-8 activation and apoptosis in HUVECs induced by...
journal_title：Cellular signalling
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abstract：:Tribbles 3 homolog (TRB3) is recently identified as a scaffold-like regulator of various signal transducers and has been implicated in several processes including insulin signaling, NF-kappaB signaling, lipid metabolism and BMP signaling. To further understand cellular mechanisms of TRB3 regulation, we performed a yea...
journal_title：Cellular signalling
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doi：10.1016/j.cellsig.2008.01.010
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journal_title：Cellular signalling
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journal_title：Cellular signalling
pub_type： 杂志文章
doi：10.1016/j.cellsig.2004.08.007
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journal_title：Cellular signalling
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doi：10.1016/j.cellsig.2018.01.004
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journal_title：Cellular signalling
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journal_title：Cellular signalling
pub_type： 杂志文章,评审
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更新日期：1996-08-01 00:00:00
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pub_type： 杂志文章
doi：10.1016/0898-6568(90)90069-m
更新日期：1990-01-01 00:00:00
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journal_title：Cellular signalling
pub_type： 杂志文章,评审
doi：10.1016/j.cellsig.2007.04.009
更新日期：2007-09-01 00:00:00
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journal_title：Cellular signalling
pub_type： 杂志文章,评审
doi：10.1016/j.cellsig.2006.01.022
更新日期：2006-11-01 00:00:00
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journal_title：Cellular signalling
pub_type： 杂志文章
doi：10.1016/j.cellsig.2004.06.004
更新日期：2005-01-01 00:00:00
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journal_title：Cellular signalling
pub_type： 杂志文章,评审
doi：10.1016/s0898-6568(97)00041-7
更新日期：1997-09-01 00:00:00
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journal_title：Cellular signalling
pub_type： 杂志文章
doi：10.1016/j.cellsig.2009.05.011
更新日期：2009-10-01 00:00:00
abstract：PURPOSE OF REVIEW:microRNAs (miRNAs) are a class of small, evolutionarily conserved, non-coding RNAs (ncRNAs) that function as inhibitors of post-transcriptional mRNA expression. They are implicated in the pathogenesis of numerous diseases, including many common kidney conditions. In this review, we focus on how miRNAs...
journal_title：Cellular signalling
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doi：10.1016/j.cellsig.2020.109548
更新日期：2020-07-01 00:00:00
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journal_title：Cellular signalling
pub_type： 杂志文章
doi：10.1016/j.cellsig.2020.109800
更新日期：2020-12-01 00:00:00
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journal_title：Cellular signalling
pub_type： 杂志文章
doi：10.1016/s0898-6568(98)00044-8
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journal_title：Cellular signalling
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doi：10.1016/j.cellsig.2013.06.005
更新日期：2013-10-01 00:00:00
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journal_title：Cellular signalling
pub_type： 杂志文章
doi：10.1016/j.cellsig.2014.02.006
更新日期：2014-06-01 00:00:00
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journal_title：Cellular signalling
pub_type： 杂志文章
doi：10.1016/j.cellsig.2014.10.009
更新日期：2015-01-01 00:00:00
abstract：:The upstream stimulatory factors 1 (USF1) and 2 (USF2) are transcription factors which bind to E-box motifs of various promoters regulating a variety of different cellular processes. Only little is known about the regulation of USFs. Here, we identified protein kinase CK2 as an enzyme that phosphorylates USF1 but not ...
journal_title：Cellular signalling
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doi：10.1016/j.cellsig.2014.08.028
更新日期：2014-12-01 00:00:00
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journal_title：Cellular signalling
pub_type： 杂志文章
doi：10.1016/j.cellsig.2014.12.004
更新日期：2015-03-01 00:00:00
abstract：:Transforming growth factor-β (TGF-β) signaling plays a key role in regulating normal cell growth and differentiation, and mutations affecting members of this pathway contribute to cancer development and metastasis. In DNA mismatch repair (MMR)-deficient colorectal cancers that exhibit the microsatellite instability (M...
journal_title：Cellular signalling
pub_type： 杂志文章
doi：10.1016/j.cellsig.2016.04.012
更新日期：2016-08-01 00:00:00
abstract：:Cyclic adenosine monophosphate (cAMP)-dependent protein kinase A(PKA) is considered to be a physiologic modulator of superoxide generation by stimulated neutrophils. Mechanisms of the inhibitory action of PKA are poorly understood. In this study, we investigated effects of cAMP-elevating agents on the phosphorylation ...
journal_title：Cellular signalling
pub_type： 杂志文章
doi：10.1016/0898-6568(96)00052-6
更新日期：1996-06-01 00:00:00
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journal_title：Cellular signalling
pub_type： 杂志文章
doi：10.1016/j.cellsig.2018.06.006
更新日期：2018-10-01 00:00:00
abstract：:The p75 neurotrophin receptor (p75(NTR)) plays a critical role in various neuronal and non-neuronal cell types by regulating cell survival, differentiation and proliferation. To evaluate the influence of p75(NTR) in breast cancer development, we have established and characterized breast cancer cells which stably overe...
journal_title：Cellular signalling
pub_type： 杂志文章
doi：10.1016/j.cellsig.2010.07.014
更新日期：2010-12-01 00:00:00
abstract：:Protein-tyrosine phosphatases (PTPases) play an essential role in the regulation of reversible tyrosine phosphorylation of cellular proteins that mediate insulin action. In order to explore the potential role of the transmembrane PTPase (LAR) in insulin receptor signal transduction, we overexpressed the full-length LA...
journal_title：Cellular signalling
pub_type： 杂志文章,评审
doi：10.1016/s0898-6568(96)00101-5
更新日期：1996-11-01 00:00:00
