Pu X, Yu S, Fan W, Liu L, Ma X, Ren J. Guiqi polysaccharide protects the normal human fetal lung fibroblast WI-38 cells from H2O2-induced premature senescence.
Int J Clin Exp Pathol 2015;
8:4398-4407. [PMID:
26191131 PMCID:
PMC4503003]
[Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Received: 02/28/2015] [Accepted: 04/15/2015] [Indexed: 06/04/2023]
Abstract
OBJECTIVE
This study is to investigate the effects of Guiqi polysaccharide (GQP) on H2O2-induced premature senescence in normal human fetal lung fibroblast WI-38 cells.
METHODS
WI-38 cells were subjected to treatments of GQP, Angelica sinensis polysaccharide (ASP), and Astragalus membranaceus polysaccharide (AMP), and then treated with H2O2 to induce premature senescence. Morphological observation, MTT assay, senescence-associated β-galactosidase activity assessment, telomerase activity determination, cell cycle analysis, and Western blot analysis were performed to evaluate cellular senescence.
RESULTS
H2O2 treatment induced premature senescence in WI-38 cells, as indicated by the decreased fibroblast proliferation activity and changed cellular morphology. When treated with GQP, ASP, or AMP, the morphological changes in WI-38 cells induced by H2O2 could be restored. SA-β-gal activity was elevated in H2O2-treated WI-38 cells, which could be decreased by GQP treatment. Moreover, compared with the normal control, H2O2 treatment significantly inhibited the telomerase activity of WI-38 cells. However, GQP effectively elevated the telomerase activity of these senescent cells. Furthermore, flow cytometry and cell cycle analysis showed that GQP treatment could abrogate the cell cycle arrest in H2O2-treated WI-38 cells, which might contribute to the anti-senescent effects. In addition, GQP significantly affected the p53-p21 and p16-pRb pathways in H2O2-treated WI-38 cells. The effectiveness of GQP was superior to AMP or ASP treatment alone.
CONCLUSION
GQP has protective effects in oxidative stress-induced senescence. Our findings suggest the promising role of GQP as an attractive and bio-safe agent with the potential to retard senescence and attenuate senescence-related diseases.
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