Hafnium oxide nanoparticle activated by radiotherapy generates an anti-tumor immune response

ASTRO, San Antonio, Texas · 2018, Galon J. et al.


Galon J.1, Laé M.2, Thariat J.3, Carrere S.4, Papai Z.5, Delannes M.6, Sargos P.7, Rochaix P.6, Mangel L. C.8, Sapi Z.9, Tornoczky T.8, Peyrottes I.10, Tetreau R.11, Château M. C.4, Sunyach M. P.12, Agoston P.13, Brisse H.2, Llacer C.11, Lecesne A.14, Bonvalot S.2

1 – INSERM, Paris, France
2 – Institut Curie, Paris, France
3 – Centre Baclesse, Caen, France
4 – Institut du cancer de Montpellier, Montpellier, France
5 – Magyar Honvedseg Egeszsegugyi Kozpont, Budapest, Hungary
6 – Institut Universitaire du Cancer Toulouse, Toulouse, France
7 – Department of Radiation Oncology, Institut Bergonie, Bordeaux, France
8 – Pecs University, Pecs, Hungary
9 – Semmelweis University, Budapest, Hungary
10 – Centre Antoine Lacassagne, Nice, France
11 – Montpellier Cancer Institute, Montpellier, France
12 – Centre Léon Berard, Lyon, France
13 – National Institute of Oncology, Budapest, Hungary
14 – Institut Gustave Roussy, Villejuif, France


Soft tissue sarcoma (STS) is a rare type of cancer, which occurs in tissues connecting, supporting and/or surrounding other structures of the body, like muscle, fat, etc. More than 50 subtypes of STS exist, characterized by a strong propensity to local recurrence and metastatic spreading. Consistently, the immune microenvironment in sarcomas is highly variable. A new class of high electron density material, hafnium oxide, was designed at the nanoscale to efficiently absorb ionizing radiation from within the tumor cells and increase the dose deposition into the tumor.

These nanoparticles (HfO2-NP), delivered into the tumor by a single injection and activated by radiotherapy, have the ability to enhance immunogenic cell death and immune response in preclinical studies. Here, we explore in a phase II/III trial in patients with locally advanced STS, the effects of nanosized hafnium oxide exposed to RT in terms of tumor immune profile changes in patients, when compared to RT alone.

Regarding immune cells infiltrates (post- vs pre-treatment), promising results are reported for patients treated with HfO2-NP activated by RT, when compared to RT. So far, these results show that HfO2-NP + RT induces a specific adaptive immune pattern. As such, it may convert immunologically “cold” tumor into “hot” tumor and be effectively combined with immunotherapeutic agents across oncology. More tissue samples are under evaluation to reinforce these findings.

By continuing to use the site, you agree to the use of cookies.En poursuivant votre navigation sur ce site, vous acceptez l’utilisation de cookies. More information.En savoir plus.

The cookie settings on this website are set to “allow cookies” to give you the possibility to switch between languages in a way that this will not interfere with page navigation. If you continue to use this website without changing your cookie settings or you click “Accept” below then you are consenting to this.Par défaut, les paramètres de ce site autorisent les cookies pour vous permettre notamment de naviguer entre les différentes langues disponibles. Nous utilisons des cookies pour vous proposer un site internet facile d'utilisation, sécurisé et fonctionnel. Si vous les autorisez également, cliquez sur « Accepter » ou poursuivez simplement votre navigation.