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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 PLoS+One
2017 ; 12
(11
): e0187532
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STING expression and response to treatment with STING ligands in premalignant and
malignant disease
#MMPMID29135982
Baird JR
; Feng Z
; Xiao HD
; Friedman D
; Cottam B
; Fox BA
; Kramer G
; Leidner RS
; Bell RB
; Young KH
; Crittenden MR
; Gough MJ
PLoS One
2017[]; 12
(11
): e0187532
PMID29135982
show ga
Human papilloma virus positive (HPV+) tumors represent a large proportion of
anal, vulvar, vaginal, cervical and head and neck squamous carcinomas (HNSCC) and
late stage invasive disease is thought to originate from a premalignant state.
Cyclic dinucleotides that activate STimulator of INterferon Genes (STING) have
been shown to cause rapid regression of a range of advanced tumors. We aimed to
investigate STING ligands as a novel treatment for papilloma. We tested therapies
in a spontaneous mouse model of papilloma of the face and anogenital region that
histologically resembles human HPV-associated papilloma. We demonstrate that
STING ligands cause rapid regression of papilloma, associated with T cell
infiltration, and are significantly more effective than Imiquimod, a current
immunotherapy for papilloma. In humans, we show that STING is expressed in the
basal layer of normal skin and lost during keratinocyte differentiation. We found
STING was expressed in all HPV-associated cervical and anal dysplasia and was
strongly expressed in the cancer cells of HPV+ HNSCC but not in HPV-unrelated
HNSCC. We found no strong association between STING expression and progressive
disease in non-HPV oral dysplasia and oral pre-malignancies that are not
HPV-related. These data demonstrate that STING is expressed in basal cells of the
skin and is retained in HPV+ pre-malignancies and advanced cancers, but not in
HPV-unrelated HNSCC. However, using a murine HNSCC model that does not express
STING, we demonstrate that STING ligands are an effective therapy regardless of
expression of STING by the cancer cells.