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A Threshold Level of Intratumor CD8+ T-cell PD1 Expression Dictates Therapeutic Response to Anti-PD1.

Identifieur interne : 003255 ( Main/Exploration ); précédent : 003254; suivant : 003256

A Threshold Level of Intratumor CD8+ T-cell PD1 Expression Dictates Therapeutic Response to Anti-PD1.

Auteurs : Shin Foong Ngiow [Australie] ; Arabella Young [Australie] ; Nicolas Jacquelot [France] ; Takahiro Yamazaki [France] ; David Enot [France] ; Laurence Zitvogel [France] ; Mark J. Smyth [Australie]

Source :

RBID : pubmed:26208901

Descripteurs français

English descriptors

Abstract

Despite successes, thus far, a significant proportion of the patients treated with anti-PD1 antibodies have failed to respond. We use mouse tumor models of anti-PD1 sensitivity and resistance and flow cytometry to assess tumor-infiltrating immune cells immediately after therapy. We demonstrate that the expression levels of T-cell PD1 (PD1(lo)), myeloid, and T-cell PDL1 (PDL1(hi)) in the tumor microenvironment inversely correlate and dictate the efficacy of anti-PD1 mAb and function of intratumor CD8(+) T cells. In sensitive tumors, we reveal a threshold for PD1 downregulation on tumor-infiltrating CD8(+) T cells below which the release of adaptive immune resistance is achieved. In contrast, PD1(hi) T cells in resistant tumors fail to be rescued by anti-PD1 therapy and remain dysfunctional unless intratumor PDL1(lo) immune cells are targeted. Intratumor Tregs are partly responsible for the development of anti-PD1-resistant tumors and PD1(hi) CD8(+) T cells. Our analyses provide a framework to interrogate intratumor CD8(+) T-cell PD1 and immune PDL1 levels and response in human cancer.

DOI: 10.1158/0008-5472.CAN-15-1082
PubMed: 26208901


Affiliations:


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Le document en format XML

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<div type="abstract" xml:lang="en">Despite successes, thus far, a significant proportion of the patients treated with anti-PD1 antibodies have failed to respond. We use mouse tumor models of anti-PD1 sensitivity and resistance and flow cytometry to assess tumor-infiltrating immune cells immediately after therapy. We demonstrate that the expression levels of T-cell PD1 (PD1(lo)), myeloid, and T-cell PDL1 (PDL1(hi)) in the tumor microenvironment inversely correlate and dictate the efficacy of anti-PD1 mAb and function of intratumor CD8(+) T cells. In sensitive tumors, we reveal a threshold for PD1 downregulation on tumor-infiltrating CD8(+) T cells below which the release of adaptive immune resistance is achieved. In contrast, PD1(hi) T cells in resistant tumors fail to be rescued by anti-PD1 therapy and remain dysfunctional unless intratumor PDL1(lo) immune cells are targeted. Intratumor Tregs are partly responsible for the development of anti-PD1-resistant tumors and PD1(hi) CD8(+) T cells. Our analyses provide a framework to interrogate intratumor CD8(+) T-cell PD1 and immune PDL1 levels and response in human cancer.</div>
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<name sortKey="Ngiow, Shin Foong" sort="Ngiow, Shin Foong" uniqKey="Ngiow S" first="Shin Foong" last="Ngiow">Shin Foong Ngiow</name>
</noRegion>
<name sortKey="Smyth, Mark J" sort="Smyth, Mark J" uniqKey="Smyth M" first="Mark J" last="Smyth">Mark J. Smyth</name>
<name sortKey="Young, Arabella" sort="Young, Arabella" uniqKey="Young A" first="Arabella" last="Young">Arabella Young</name>
</country>
<country name="France">
<noRegion>
<name sortKey="Jacquelot, Nicolas" sort="Jacquelot, Nicolas" uniqKey="Jacquelot N" first="Nicolas" last="Jacquelot">Nicolas Jacquelot</name>
</noRegion>
<name sortKey="Enot, David" sort="Enot, David" uniqKey="Enot D" first="David" last="Enot">David Enot</name>
<name sortKey="Yamazaki, Takahiro" sort="Yamazaki, Takahiro" uniqKey="Yamazaki T" first="Takahiro" last="Yamazaki">Takahiro Yamazaki</name>
<name sortKey="Zitvogel, Laurence" sort="Zitvogel, Laurence" uniqKey="Zitvogel L" first="Laurence" last="Zitvogel">Laurence Zitvogel</name>
</country>
</tree>
</affiliations>
</record>

Pour manipuler ce document sous Unix (Dilib)

EXPLOR_STEP=$WICRI_ROOT/Wicri/Asie/explor/AustralieFrV1/Data/Main/Exploration
HfdSelect -h $EXPLOR_STEP/biblio.hfd -nk 003255 | SxmlIndent | more

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Pour mettre un lien sur cette page dans le réseau Wicri

{{Explor lien
   |wiki=    Wicri/Asie
   |area=    AustralieFrV1
   |flux=    Main
   |étape=   Exploration
   |type=    RBID
   |clé=     pubmed:26208901
   |texte=   A Threshold Level of Intratumor CD8+ T-cell PD1 Expression Dictates Therapeutic Response to Anti-PD1.
}}

Pour générer des pages wiki

HfdIndexSelect -h $EXPLOR_AREA/Data/Main/Exploration/RBID.i   -Sk "pubmed:26208901" \
       | HfdSelect -Kh $EXPLOR_AREA/Data/Main/Exploration/biblio.hfd   \
       | NlmPubMed2Wicri -a AustralieFrV1 

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Data generation: Tue Dec 5 10:43:12 2017. Site generation: Tue Mar 5 14:07:20 2024