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. 2025 Aug 13:e15356.
doi: 10.1002/advs.202415356. Online ahead of print.

Systematic Targeting of GD2-Positive Neuroblastoma Tumors With a Photooncolytic Phage Nanovector Platform

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Systematic Targeting of GD2-Positive Neuroblastoma Tumors With a Photooncolytic Phage Nanovector Platform

Suleman Khan Zadran et al. Adv Sci (Weinh). .

Abstract

Disialoganglioside-GD2 is a key molecular target for Neuroblastoma (NB) immunotherapy based on the employment of GD2-targeting antibodies. However, about 50% of treated patients can experience tumor relapse due to limited immune-mediated cytotoxicity and poor antibody penetration into tumors. To address this problem, a tumor-penetrating photo-oncolytic phage nanovector platform is genetically and chemically developed that selectively targets GD2-expressing NB cells. The phage bioconjugates, functionalized with different photosensitizers, result in specific and selective oncolysis of GD2-positive NB cells upon light irradiation, without affecting GD2-negative ones. The photo-oncolytic phage vectors are shown to deeply penetrate into GD2-positive tumor spheroids in vitro, and to cross biological barriers in a zebrafish xenograft model, maintaining their ablation specificity upon irradiation. Finally, to overcome resistance from GD2 loss, often linked to poor prognosis, a CRISPRa strategy is introduced to reactivate GD2 expression in GD2-negative cells. The approach offers a minimally invasive and highly effective strategy, addressing unmet needs in NB therapy.

Keywords: CRISPRa; M13 bacteriophage biotherapeutics; neuroblastoma GD2; photodynamic therapy; zebrafish xenograft.

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