Abstract:
BACKGROUND:The infiltrative nature and lymphatic metastasis of head and neck squamous cell carcinoma (HNSCC) are the main reasons leading to its poor prognosis. METHODS:A multimodal surface-enhanced resonance Raman spectroscopy (SERRS) and magnetic resonance (MR) nanoprobe, in which paramagnetic chelators and heptamethine cyanine-based Raman reporter molecules were functionalized on a gold nanostar (AuS) surface was developed. Preoperative MRI and intraoperative SERRS-guided surgery were performed on rabbits bearing head and neck VX2 tumours to determine feasibility of the MR/SERRS probe in defining tumour marginal infiltration and lymph nodes metastasis. FINDINGS:Preoperative T1-weighted MRI (T1W-MRI) unambiguously delineated the orthotopic head and neck VX2 tumour xenograft and detected the metastatic lymph nodes in rabbit models after intravenous administration of the probe. With the assistance of a hand-held Raman detector, the probe not only intra-operatively demarcated invasive tumour margins but also successfully distinguished metastatic lymph nodes via a remarkable attenuated Raman signal. Importantly, the group of rabbits subjected to the SERRS-guided surgery exhibited prolonged median survival time (78 days) compared with that of the control group without surgical intervention (29 days) or the group treated with conventional white-light-guided surgery (42 days) (P < 0.0001). INTERPRETATION:we developed a novel AuS-based multimodal MR/SERRS probe. The capability of this probe to identify both a tumour xenograft and metastatic lymph nodes preoperatively by MRI and intra-operatively by SERRS not only avoids the need for unnecessary resection of neurological structures but also provides a new opportunity to improve the surgical prognosis of head and neck carcinoma of infiltrative nature.
journal_name
EBioMedicinejournal_title
EBioMedicineauthors
Sun P,Zhang Y,Li K,Wang C,Zeng F,Zhu J,Wu Y,Tao Xdoi
10.1016/j.ebiom.2019.10.055subject
Has Abstractpub_date
2019-12-01 00:00:00pages
93-102issn
2352-3964pii
S2352-3964(19)30730-3journal_volume
50pub_type
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