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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 Biomaterials
2016 ; 104
(ä): 145-57
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Elimination of epithelial-like and mesenchymal-like breast cancer stem cells to
inhibit metastasis following nanoparticle-mediated photothermal therapy
#MMPMID27450902
Paholak HJ
; Stevers NO
; Chen H
; Burnett JP
; He M
; Korkaya H
; McDermott SP
; Deol Y
; Clouthier SG
; Luther T
; Li Q
; Wicha MS
; Sun D
Biomaterials
2016[Oct]; 104
(ä): 145-57
PMID27450902
show ga
Increasing evidence suggesting breast cancer stem cells (BCSCs) drive metastasis
and evade traditional therapies underscores a critical need to exploit the
untapped potential of nanotechnology to develop innovative therapies that will
significantly improve patient survival. Photothermal therapy (PTT) to induce
localized hyperthermia is one of few nanoparticle-based treatments to enter
clinical trials in human cancer patients, and has recently gained attention for
its ability to induce a systemic immune response targeting distal cancer cells in
mouse models. Here, we first conduct classic cancer stem cell (CSC) assays, both
in vitro and in immune-compromised mice, to demonstrate that PTT mediated by
highly crystallized iron oxide nanoparticles effectively eliminates BCSCs in
translational models of triple negative breast cancer. PTT in vitro
preferentially targets epithelial-like ALDH + BCSCs, followed by mesenchymal-like
CD44+/CD24- BCSCs, compared to bulk cancer cells. PTT inhibits BCSC self-renewal
through reduction of mammosphere formation in primary and secondary generations.
Secondary implantation in NOD/SCID mice reveals the ability of PTT to impede
BCSC-driven tumor formation. Next, we explore the translational potential of PTT
using metastatic and immune-competent mouse models. PTT to inhibit BCSCs
significantly reduces metastasis to the lung and lymph nodes. In immune-competent
BALB/c mice, PTT effectively eliminates ALDH + BCSCs. These results suggest the
feasibility of incorporating PTT into standard clinical treatments such as
surgery to enhance BCSC destruction and inhibit metastasis, and the potential of
such combination therapy to improve long-term survival in patients with
metastatic breast cancer.