Abstract:
:The aim of this study was to investigate the role of NYD-SP15 in the growth and oxidative-stress responses of ARPE-19 cells. ARPE-19 cell lines overexpressing wild type or RNA interference against NYD-SP15 were established via lentivirus transfection. Cell growth and proliferation, migration, apoptosis, and cell cycle progression were monitored using the Cell Counting Kit-8 assay, the wound scratch assay, and flow cytometry, respectively. Caspase-3/8/9 activity was examined using the caspase-3/8/9 assay kit. An hydrogen peroxide (H 2 O 2 )-induced oxidative-stress damage model was used to study the effect of NYD-SP15 knockdown by examining the activity of reactive oxygen species (ROS). Expressions of Kelch-like ECH-associated protein 1 (Keap-1)/heme oxygenase-1 (HO-1)/nuclear factor erythroid 2-related factor 2 (Nrf2), mitogen-activated protein kinase (MAPK), and Akt were detected by Western blot analysis. The mRNA chip of NYD-SP15 overexpressed ARPE-19 cells as well as controls were performed by one array plus process. Overexpression (OE) of NYD-SP15 inhibited the proliferation and migration of ARPE-19 cells, and led to apoptosis and caspase-3/9 activation. OE of NYD-SP15 inhibited MAPKs and Akt signaling. Downregulation of NYD-SP15 had no effect on the growth of normally cultured ARP19 cells with 10% fetal bovine serum, but promoted the growth of ARP19 cells in the presence of starvation challenge. Gene chip showed that OE of NYD-SP15 led to downregulation of 254 genes and upregulation of 57 genes. Downregulation of NYD-SP15 also exerted a protective effect on H 2 O 2 -induced cell apoptosis and ROS. NYD-SP15 downregulation led to increments in the expression of Nrf2, Keap-1, and HO-1 in response to 200 μM H 2 O 2 . NYD-SP15 might inhibit the growth, proliferation, and migration and promote apoptosis of ARPE-19 cells via MAPK and Akt signaling. Downregulation of NYD-SP15 could protect ARPE-19 cells from H 2 O 2 -induced oxidative damage by active Keap-1/HO-1/Nrf2, Akt, and MAPK signaling.
journal_name
J Cell Biochemjournal_title
Journal of cellular biochemistryauthors
Xu Y,Wang L,Cao L,Chen L,Liu Qdoi
10.1002/jcb.27104subject
Has Abstractpub_date
2018-10-28 00:00:00eissn
0730-2312issn
1097-4644pub_type
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