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2015 ; 206
(ä): 122-30
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Targeting of metastasis-promoting tumor-associated fibroblasts and modulation of
pancreatic tumor-associated stroma with a carboxymethylcellulose-docetaxel
nanoparticle
#MMPMID25804872
Ernsting MJ
; Hoang B
; Lohse I
; Undzys E
; Cao P
; Do T
; Gill B
; Pintilie M
; Hedley D
; Li SD
J Control Release
2015[May]; 206
(ä): 122-30
PMID25804872
show ga
Pancreatic ductal adenocarcinomas are characterized by the desmoplastic reaction,
a dense fibrous stroma that has been shown to be supportive of tumor cell growth,
invasion, and metastasis, and has been associated with resistance to chemotherapy
and reduced patient survival. Here, we investigated targeted depletion of stroma
for pancreatic cancer therapy via taxane nanoparticles. Cellax-DTX polymer is a
conjugate of docetaxel (DTX), polyethylene glycol (PEG), and acetylated
carboxymethylcellulose, a construct which condenses into well-defined 120nm
particles in an aqueous solution, and is suitable for intravenous injection. We
examined Cellax-DTX treatment effects in highly stromal primary patient-derived
pancreatic cancer xenografts and in a metastatic PAN02 mouse model of pancreatic
cancer, focusing on specific cellular interactions in the stroma, pancreatic
tumor growth and metastasis. Greater than 90% of Cellax-DTX particles accumulate
in smooth muscle actin (SMA) positive cancer-associated fibroblasts which results
in long-term depletion of this stromal cell population, an effect not observed
with Nab-paclitaxel (Nab-PTX). The reduction in stromal density leads to a
>10-fold increase in tumor perfusion, reduced tumor weight and a reduction in
metastasis. Consentingly, Cellax-DTX treatment increased survival when compared
to treatment with gemcitabine or Nab-PTX in a metastatic PAN02 mouse model.
Cellax-DTX nanoparticles interact with the tumor-associated stroma, selectively
interacting with and depleting SMA positive cells and macrophage, effects of
which are associated with significant changes in tumor progression and
metastasis.
|Animals
[MESH]
|Antineoplastic Agents/*administration & dosage/chemistry/therapeutic use
[MESH]
|Carboxymethylcellulose Sodium/*chemistry
[MESH]
|Cell Line, Tumor
[MESH]
|Docetaxel
[MESH]
|Drug Delivery Systems
[MESH]
|Female
[MESH]
|Fibroblasts/*drug effects/pathology
[MESH]
|Humans
[MESH]
|Mice
[MESH]
|Mice, Inbred C57BL
[MESH]
|Nanoparticles/*economics
[MESH]
|Neoplasm Metastasis/pathology/prevention & control
[MESH]