MicroRNA-126 affects rheumatoid arthritis synovial fibroblast proliferation and apoptosis by targeting PIK3R2 and regulating PI3K-AKT signal pathway

Content Provider	Semantic Scholar
Author	Qu, Yuan Wu, Jing Deng, Jia‐ Xin Zhang, Yu-ping Liang, Wan-yi Jiang, Zhen-lan Yu, Qing-Hong Li, Juan
Copyright Year	2016
Abstract	Rheumatoid arthritis (RA) is a chronic autoimmune disease that causes inflammation and destruction of the joints as well as an increased risk of cardiovascular disease. RA synovial fibroblasts (RASFs) are involved in the progression of RA and release pro-inflammatory cytokines. On the other hand, microRNAs (miRs) may help control the inflammatory response of immune and non-immune cells. Therefore, our study used lentiviral expression vectors to test the effects of miR-126 overexpression on RASF proliferation and apoptosis. Luciferase experiments verified the targeting relationship between miR-126 and PIK3R2 gene. The co-transfection of anti-miR-126 and PIK3R2 siRNA to RASFs were used to identify whether PIK3R2 was directly involved in proliferation and apoptosis of miR-126-induced RASFs. Real-time polymerase chain reaction (PCR) was used to detect miR-126 and PIK3R2 expressions. MTT assay was used to detect cell proliferation. Flow cytometry was used to detect cell apoptosis and cell cycle. Western blotting was used to detect PIK3R2, PI3K, AKT and p-AKT proteins. After Lv-miR-126 infected RASFs, the relative expression of miR-126 was significantly enhanced. MiR-126 promoted RASF proliferation and inhibited apoptosis. Levels of PIK3R2 decreased while total PI3K and p-AKT levels increased in RASFs overexpressing miR-126. Co-transfection of anti-miR-126 and PIK3R2 siRNA also increased PI3K and p-AKT levels as well as RASF proliferation and reduced apoptosis, as compared to anti-miR-126 treatment alone. Finally, luciferase reporter assays showed that miR-126 targeted PIK3R2. Our data indicate that miR-126 overexpression in RASFs inhibits PIK3R2 expression and promotes proliferation while inhibiting apoptosis. This suggests inhibiting miR-126 may yield therapeutic benefits in the treatment of RA.
Starting Page	74217
Ending Page	74226
Page Count	10
File Format	PDF HTM / HTML
Alternate Webpage(s)	http://www.oncotarget.com/index.php?journal=oncotarget&op=download&page=article&path%5B%5D=12487&path%5B%5D=48324
PubMed reference number	27729613v1
Alternate Webpage(s)	https://doi.org/10.18632/oncotarget.12487
DOI	10.18632/oncotarget.12487
Journal	Oncotarget
Volume Number	7
Language	English
Access Restriction	Open
Subject Keyword	1-Phosphatidylinositol 3-Kinase Apoptosis Articular system Autoimmune Diseases Cardiovascular Diseases Cell Cycle Cell Proliferation Hepatitis B Inhibition Luciferases MicroRNAs PIK3R2 gene Polymerase Chain Reaction Proto-Oncogene Proteins c-akt Rheumatoid Arthritis Western Blotting benefit cellular targeting monooxyethylene trimethylolpropane tristearate
Content Type	Text
Resource Type	Article