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@ARTICLE{deCoaa:120518,
author = {Y. P. de Coaña and M. Wolodarski and I. Poschke$^*$ and Y.
Yoshimoto and Y. Yang and M. Nyström and U. Edbäck and S.
E. Brage and A. Lundqvist and G. V. Masucci and J. Hansson
and R. Kiessling},
title = {{I}pilimumab treatment decreases monocytic {MDSC}s and
increases {CD}8 effector memory {T} cells in long-term
survivors with advanced melanoma.},
journal = {OncoTarget},
volume = {8},
number = {13},
issn = {1949-2553},
address = {[S.l.]},
publisher = {Impact Journals LLC},
reportid = {DKFZ-2017-00947},
pages = {21539-21553},
year = {2017},
abstract = {Ipilimumab has revolutionized malignant melanoma therapy,
but a better understanding of the mechanisms behind
treatment response and adverse effects is needed. In this
work, the immune system of ipilimumab treated patients was
monitored to investigate potential mechanisms of action that
may correlate with treatment outcome. Blood samples from 43
advanced melanoma patients were taken before, during and at
the end of treatment. Hematological parameters were measured
and flow cytometry analysis was performed in fresh samples
within two hours of sample collection. Strong differences in
markers CD45RA, CCR7, HLA-DR and CD15 between fresh and
cryopreserved samples were observed. Ipilimumab treatment
increased absolute lymphocyte counts, eosinophils, effector
T cells and their activation status, whilst diminishing the
suppressive side of the immune response, acting on
regulatory T cells and myeloid derived suppressor cells
(MDSCs). These effects were visible after one ipilimumab
infusion and, regarding eosinophil counts, correlated with
onset of adverse events. Monocytic MDSCs were decreased in
response to treatment only in patients with clinical
benefit; additionally, patients with a lower frequency of
these cells after the first ipilimumab infusion experienced
increased overall survival. CD8 effector memory T cell
frequencies at the end of treatment were higher in patients
with clinical benefit and positively correlated with
survival. These data show that a clinical response to
ipilimumab not only requires reshaping T cell populations,
but additionally involves a reduction in suppressive cells
such as monocytic MDSCs. Our work could provide insight on
predicting treatment outcome, assisting clinicians in
offering the best personalized therapeutic approach.},
cin = {G180},
ddc = {610},
cid = {I:(DE-He78)G180-20160331},
pnm = {317 - Translational cancer research (POF3-317)},
pid = {G:(DE-HGF)POF3-317},
typ = {PUB:(DE-HGF)16},
pubmed = {pmid:28423487},
pmc = {pmc:PMC5400604},
doi = {10.18632/oncotarget.15368},
url = {https://inrepo02.dkfz.de/record/120518},
}