PXD028780

PXD028780 is an original dataset announced via ProteomeXchange.

Title	Peroxiredoxin 6 protects irradiated cells from oxidative stress and shapes their senescence-associated cytokine landscape, redox proteomic analysis
Description	Cellular senescence is a complex stress response defined as an essentially irreversible cell cycle arrest mediated by the inhibition of cell cycle-specific cyclin dependent kinases. The imbalance in redox homeostasis and oxidative stress have been repeatedly observed as one of the hallmarks of the senescent phenotype. However, a large-scale study investigating protein oxidation and redox signaling in senescent cells in vitro has been lacking. Here we applied a proteome-wide analysis using SILAC-iodoTMT workflow to quantitatively estimate the level of protein sulfhydryl oxidation and proteome level changes in ionizing radiation-induced senescence (IRIS) in hTERT RPE-1 cells. We observed that senescent cells mobilized the antioxidant system to buffer the increased oxidation stress. Among the antioxidant proteins with increased expression in IRIS, an atypical 1-Cys peroxiredoxin family member, peroxiredoxin 6 (PRDX6), was identified as an important contributor to protection against oxidative stress. PRDX6 silencing increased ROS production in senescent cells, decreased their resistance to oxidative stress-induced cell death, and impaired their viability. Subsequent SILAC-iodoTMT and secretome analysis after PRDX6 silencing showed the downregulation of PRDX6 in IRIS affected protein secretory pathways, decreased expression of extracellular matrix proteins, and led to unexpected attenuation of senescence-associated secretory phenotype (SASP). The latter was exemplified by decreased secretion of pro-inflammatory cytokine IL-6 which was also confirmed after treatment with an inhibitor of PRDX6 iPLA2 activity, MJ33. Altogether, our findings suggested PRDX6 has an important and complex role in IRIS.
HostingRepository	PRIDE
AnnounceDate	2022-02-16
AnnouncementXML	Submission_2022-02-16_13:49:53.357.xml
DigitalObjectIdentifier
ReviewLevel	Peer-reviewed dataset
DatasetOrigin	Original dataset
RepositorySupport	Unsupported dataset by repository
PrimarySubmitter	Marie Vajrychová
SpeciesList	scientific name: Homo sapiens (Human); NCBI TaxID: 9606;
ModificationList	methylthiolated residue
Instrument	Q Exactive Plus

Revision	Datetime	Status	ChangeLog Entry
0	2021-09-27 03:37:31	ID requested
⏵ 1	2022-02-16 13:49:54	announced

Salovska B, Kondelova A, Pimkova K, Liblova Z, Pribyl M, Fabrik I, Bartek J, Vajrychova M, Hodny Z, Peroxiredoxin 6 protects irradiated cells from oxidative stress and shapes their senescence-associated cytokine landscape. Redox Biol, 49():102212(2022) [pubmed]

submitter keyword: cellular senescence, ionizing radiation, redox proteomics, SILAC-iodoTMT, peroxiredoxin 6

Marie Vajrychova
contact affiliation	Biomedical Research Center, University Hospital Hradec Kralove, Czech Republic
contact email	marie.vajrychova@fnhk.cz
lab head
Marie Vajrychová
contact affiliation	Biomedical Research Center, University Hospital Hradec Králové
contact email	marie.vajrychova@fnhk.cz
dataset submitter

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PRIDE project URI

• PRIDE
  1. PXD028780
     1. Label: PRIDE project
     2. Name: Peroxiredoxin 6 protects irradiated cells from oxidative stress and shapes their senescence-associated cytokine landscape, redox proteomic analysis