Title:LncRNA GAS5 as an Inflammatory Regulator Acting through Pathway in
Human Lupus
Volume: 29
Issue: 16
Author(s): Jianping Xiao and Deguang Wang*
Affiliation:
- Department of Nephrology, The Second Affiliated Hospital of Anhui Medical University, Hefei, Anhui, China
Keywords:
Long noncoding RNA, GAS5, systemic lupus erythematosus, MAPK pathway, cytokines, chemokines, monocytes.
Abstract:
Aim: To investigate the contribution of GAS5 in the pathogenesis of SLE.
Background: Systemic Lupus Erythematosus (SLE) is characterized by aberrant activity of the immune system,
leading to variable clinical symptoms. The etiology of SLE is multifactor, and growing evidence has
shown that long noncoding RNAs (lncRNAs) are related to human SLE. Recently, lncRNA growth arrest-specific
transcript 5 (GAS5) has been reported to be associated with SLE. However, the mechanism between
GAS5 and SLE is still unknown.
Objective: Find the specific mechanism of action of lncRNA GAS5 in SLE.
Methods: Collecting samples of the SLE patients, Cell culture and treatment, Plasmid construction, and transfection,
Quantitative real-time PCR analysis, Enzyme-linked immunosorbent assay (ELISA), Cell viability analysis,
Cell apoptosis analysis, Western blot.
Results: In this research, we investigated the contribution of GAS5 in the pathogenesis of SLE. We confirmed
that, compared to healthy people, the expression of GAS5 was significantly decreased in peripheral monocytes
of SLE patients. Subsequently, we found that GAS5 can inhibit the proliferation and promote the apoptosis of
monocytes by over-expressing or knocking down the expression of GAS5. Additionally, the expression of
GAS5 was suppressed by LPS. Silencing GAS5 significantly increased the expression of a group of
chemokines and cytokines, including IL-1β, IL-6, and THFα, which were induced by LPS. Furthermore, it was
identified the involvement of GAS5 in the TLR4-mediated inflammatory process was through affecting the activation
of the MAPK signaling pathway.
Conclusion: In general, the decreased GAS5 expression may be a potential contributor to the elevated production
of a great number of cytokines and chemokines in SLE patients. And our research suggests that GAS5 contributes
a regulatory role in the pathogenesis of SLE, and may provide a potential target for therapeutic intervention.
