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2016 ; 138
(7
): 1754-64
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Perioperative treatment with the new synthetic TLR-4 agonist GLA-SE reduces
cancer metastasis without adverse effects
#MMPMID26453448
Matzner P
; Sorski L
; Shaashua L
; Elbaz E
; Lavon H
; Melamed R
; Rosenne E
; Gotlieb N
; Benbenishty A
; Reed SG
; Ben-Eliyahu S
Int J Cancer
2016[Apr]; 138
(7
): 1754-64
PMID26453448
show ga
The use of TLR agonists as an anti-cancer treatment is gaining momentum given
their capacity to activate various host cellular responses through the secretion
of inflammatory cytokines and type-I interferons. It is now also recognized that
the perioperative period is a window of opportunity for various interventions
aiming at reducing the risk of cancer metastases-the major cause of cancer
related death. However, immune-stimulatory approach has not been used
perioperatively given several contraindications to surgery. To overcome these
obstacles, in this study, we used the newly introduced, fully synthetic TLR-4
agonist, Glucopyranosyl Lipid-A (GLA-SE), in various models of cancer metastases,
and in the context of acute stress or surgery. Without exerting evident adverse
effects, a single systemic administration of GLA-SE rapidly and dose dependently
elevated both innate and adaptive immunity in the circulation, lungs and the
lymphatic system. Importantly, GLA-SE treatment led to reduced metastatic
development of a mammary adenocarcinoma and a colon carcinoma by approximately
40-75% in F344 rats and BALB/c mice, respectively, at least partly through
elevating marginating-pulmonary NK cell cytotoxicity. GLA-SE is safe and well
tolerated in humans, and currently is used as an adjuvant in phase-II clinical
trials. Given that the TLR-4 receptor and its signaling cascade is highly
conserved throughout evolution, our current results suggest that GLA-SE may be a
promising immune stimulatory agent in the context of oncological surgeries,
aiming to reduce long-term cancer recurrence.