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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 Nat+Commun
2017 ; 8
(1
): 606
Nephropedia Template TP
gab.com Text
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Agonist immunotherapy restores T cell function following MEK inhibition improving
efficacy in breast cancer
#MMPMID28928458
Dushyanthen S
; Teo ZL
; Caramia F
; Savas P
; Mintoff CP
; Virassamy B
; Henderson MA
; Luen SJ
; Mansour M
; Kershaw MH
; Trapani JA
; Neeson PJ
; Salgado R
; McArthur GA
; Balko JM
; Beavis PA
; Darcy PK
; Loi S
Nat Commun
2017[Sep]; 8
(1
): 606
PMID28928458
show ga
The presence of tumor-infiltrating lymphocytes in triple-negative breast cancers
is correlated with improved outcomes. Ras/MAPK pathway activation is associated
with significantly lower levels of tumor-infiltrating lymphocytes in
triple-negative breast cancers and while MEK inhibition can promote recruitment
of tumor-infiltrating lymphocytes to the tumor, here we show that MEK inhibition
adversely affects early onset T-cell effector function. We show that ?-4-1BB and
?-OX-40 T-cell agonist antibodies can rescue the adverse effects of MEK
inhibition on T cells in both mouse and human T cells, which results in augmented
anti-tumor effects in vivo. This effect is dependent upon increased downstream
p38/JNK pathway activation. Taken together, our data suggest that although
Ras/MAPK pathway inhibition can increase tumor immunogenicity, the negative
impact on T-cell activity is functionally important. This undesirable impact is
effectively prevented by combination with T-cell immune agonist immunotherapies
resulting in superior therapeutic efficacy.MEK inhibition in breast cancer is
associated with increased tumour infiltrating lymphocytes (TILs), however, MAPK
activity is required for T cells function. Here the authors show that TILs
activity following MEK inhibition can be enhanced by agonist immunotherapy
resulting in synergic therapeutic effects.