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2016 ; 7
(46
): 75081-75093
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The anti-fibrotic effect of GV1001 combined with gemcitabine on treatment of
pancreatic ductal adenocarcinoma
#MMPMID27655706
Park JK
; Kim Y
; Kim H
; Jeon J
; Kim TW
; Park JH
; Hwnag YI
; Lee WJ
; Kang JS
Oncotarget
2016[Nov]; 7
(46
): 75081-75093
PMID27655706
show ga
GV1001 is a telomerase-based cancer vaccine made of a 16-mer telomerase reverse
transcriptase (TERT) peptide, and human TERT, the rate-limiting subunit of the
telomerase complex, is an attractive target for cancer vaccination. The aim of
this study was to evaluate the effect of telomerase peptide vaccination, GV1001
combined with gemcitabine in treatment of pancreatic ductal adenocardinoma
(PDAC). Human PDAC cell lines were used in vitro experiment and also, PDAC
xenograft mice model was established using PANC1, AsPC1 and CD133+ AsPC1 (PDAC
stem cell). Treatment groups were divided as follows; control, gemcitabine,
GV1001, gemcitabine and GV1001 combination. The inflammatory cytokines were
measured from the blood, and xenograft tumor specimens were evaluated. GV1001
treatment alone did not affect the proliferation or the apoptosis of PDAC cells.
Gemcitabine alone and gemcitabine with GV1001 groups had significantly reduced in
tumor size and showed abundant apoptosis compared to other treatment groups.
Surprisingly, xenograft PDAC tumor specimens of gemcitabine alone group had been
replaced by severe fibrosis whereas gemcitabine with GV1001 group had
significantly less fibrosis. Blood levels of tumor necrosis factor (TNF)-?,
interleukin (IL)-6 and IL-1? increased in gemcitabine alone group, however, it
was decreased in gemcitabine with GV1001 group. GV1001 combined with gemcitabine
treatment showed significant loss of fibrosis in tumor tissue as well as tumor
cell death. Therefore, further investigation of GV1001 effect combined with
gemcitabine treatment may give us useful insights to overcome the hurdle in
anti-cancer drug delivery over massive fibrosis around PDACs.