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The in vivo activation of persistent nanophosphors for optical imaging of vascularization, tumours and grafted cells

Abstract : Optical imaging for biological applications requires more sensitive tools. Near-infrared persistent luminescence nanoparticles enable highly sensitive in vivo optical detection and complete avoidance of tissue autofluorescence. However, the actual generation of persistent luminescence nanoparticles necessitates ex vivo activation before systemic administration, which prevents long-term imaging in living animals. Here, we introduce a new generation of optical nanoprobes, based on chromium-doped zinc gallate, whose persistent luminescence can be activated in vivo through living tissues using highly penetrating low-energy red photons. Surface functionalization of this photonic probe can be adjusted to favour multiple biomedical applications such as tumour targeting. Notably, we show that cells can endocytose these nanoparticles in vitro and that, after intravenous injection, we can track labelled cells in vivo and follow their biodistribution by a simple whole animal optical detection, opening new perspectives for cell therapy research and for a variety of diagnosis applications.
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https://hal.archives-ouvertes.fr/hal-02422985
Contributor : Aurélie Bessière <>
Submitted on : Monday, December 23, 2019 - 3:07:10 PM
Last modification on : Wednesday, June 23, 2021 - 12:04:41 PM

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Thomas Maldiney, Aurélie Bessière, Johanne Seguin, Eliott Teston, Suchinder Sharma, et al.. The in vivo activation of persistent nanophosphors for optical imaging of vascularization, tumours and grafted cells. Nature Materials, Nature Publishing Group, 2014, 13 (4), pp.418-426. ⟨10.1038/nmat3908⟩. ⟨hal-02422985⟩

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