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Heparan sulfation is essential for the prevention of cellular senescence

Title
Heparan sulfation is essential for the prevention of cellular senescence
Authors
Jung, S. H.Lee, H. C.Yu, D-MKim, B. C.Park, S. M.Lee, Y-SPark, H. J.Ko, Y-GLee, J-S
Ewha Authors
이윤실
SCOPUS Author ID
이윤실scopus
Issue Date
2016
Journal Title
CELL DEATH AND DIFFERENTIATION
ISSN
1350-9047JCR Link1476-5403JCR Link
Citation
vol. 23, no. 3, pp. 417 - 429
Publisher
NATURE PUBLISHING GROUP
Indexed
SCI; SCIE; SCOPUS WOS scopus
Abstract
Cellular senescence is considered as an important tumor-suppressive mechanism. Here, we demonstrated that heparan sulfate (HS) prevents cellular senescence by fine-tuning of the fibroblast growth factor receptor (FGFR) signaling pathway. We found that depletion of 3'-phosphoadenosine 5'-phosphosulfate synthetase 2 (PAPSS2), a synthetic enzyme of the sulfur donor PAPS, led to premature cell senescence in various cancer cells and in a xenograft tumor mouse model. Sodium chlorate, a metabolic inhibitor of HS sulfation also induced a cellular senescence phenotype. p53 and p21 accumulation was essential for PAPSS2-mediated cellular senescence. Such senescence phenotypes were closely correlated with cell surface HS levels in both cancer cells and human diploid fibroblasts. The determination of the activation of receptors such as FGFR1, Met, and insulin growth factor 1 receptor beta indicated that the augmented FGFR1/AKT signaling was specifically involved in premature senescence in a HS-dependent manner. Thus, blockade of either FGFR1 or AKT prohibited p53 and p21 accumulation and cell fate switched from cellular senescence to apoptosis. In particular, desulfation at the 2-O position in the HS chain contributed to the premature senescence via the augmented FGFR1 signaling. Taken together, we reveal, for the first time, that the proper status of HS is essential for the prevention of cellular senescence. These observations allowed us to hypothesize that the FGF/FGFR signaling system could initiate novel tumor defenses through regulating premature senescence.
DOI
10.1038/cdd.2015.107
Appears in Collections:
약학대학 > 약학과 > Journal papers
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