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.jpg): Failed to open stream: No such file or directory in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 117 Sci+Rep
2017 ; 7
(1
): 11864
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Oligo-Fucoidan prevents IL-6 and CCL2 production and cooperates with p53 to
suppress ATM signaling and tumor progression
#MMPMID28928376
Chen LM
; Liu PY
; Chen YA
; Tseng HY
; Shen PC
; Hwang PA
; Hsu HL
Sci Rep
2017[Sep]; 7
(1
): 11864
PMID28928376
show ga
Low-molecular-weight Fucoidan (Oligo-Fucoidan) is a sulfated polysaccharide that
has a variety of biological effects and has also been shown to have beneficial
health effects. However, the molecular mechanisms underlying the therapeutic
effects of Oligo-Fucoidan in patients with cancer remain unclear. Using human
colorectal cancer HCT116 cells with (p53(+/+)) or without (p53(-/-)) normal p53
expression, we found that Oligo-Fucoidan treatment reduces the occurrence of
spontaneous DNA lesions. Etoposide induces double strand DNA breaks. Subsequent
administration of Oligo-Fucoidan to etoposide-treated cells promotes p53
accumulation, p21 expression and significant decreases in
ataxia-telangiectasia-mutated (ATM), checkpoint kinase 1 (Chk1) and ?-H2AX
phosphorylation in p53(+/+) cells compared with p53(-/-) cells. Similarly,
co-administration of Oligo-Fucoidan with etoposide inhibits ATM, Chk1 and ?-H2AX
phosphorylation, particularly in the presence of p53. Furthermore, Oligo-Fucoidan
supplementation increases cancer cell death and attenuates the adverse effects
induced by etoposide that decreases production of the pro-inflammatory cytokine
IL-6 and chemokine CCL2/MCP-1. Importantly, Oligo-Fucoidan decreases the
tumor-promoting M2 macrophages in microenvironment as well as collaborates with
p53 and works in combination with etoposide to prevent HCT116 tumorigenicity. Our
results first demonstrate that p53 enables Oligo-Fucoidan to effectively inhibit
tumor progression, and Oligo-Fucoidan minimizes the side effects of chemotherapy
and alters tumor microenvironment.