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Nanoparticle-mediated Photodynamic Therapy as a Method to Ablate Oral Cavity Squamous Cell Carcinoma in Preclinical Models.
Sahovaler, Axel; Valic, Michael S; Townson, Jason L; Chan, Harley H L; Zheng, Mark; Tzelnick, Sharon; Mondello, Tiziana; Pener-Tessler, Alon; Eu, Donovan; El-Sayes, Abdullah; Ding, Lili; Chen, Juan; Douglas, Catriona M; Weersink, Robert; Muhanna, Nidal; Zheng, Gang; Irish, Jonathan C.
Afiliação
  • Sahovaler A; Department of Otolaryngology-Head and Neck Surgery, University of Toronto, Toronto, Ontario, Canada.
  • Valic MS; TECHNA Institute, Guided Therapeutics (GTx) Program, University Health Network, Toronto, Ontario, Canada.
  • Townson JL; Princess Margaret Cancer Centre, University Health Network, Toronto, Ontario, Canada.
  • Chan HHL; Princess Margaret Cancer Centre, University Health Network, Toronto, Ontario, Canada.
  • Zheng M; Institute of Biomedical Engineering (BME), University of Toronto, Toronto, Ontario, Canada.
  • Tzelnick S; TECHNA Institute, Guided Therapeutics (GTx) Program, University Health Network, Toronto, Ontario, Canada.
  • Mondello T; Princess Margaret Cancer Centre, University Health Network, Toronto, Ontario, Canada.
  • Pener-Tessler A; TECHNA Institute, Guided Therapeutics (GTx) Program, University Health Network, Toronto, Ontario, Canada.
  • Eu D; Princess Margaret Cancer Centre, University Health Network, Toronto, Ontario, Canada.
  • El-Sayes A; Princess Margaret Cancer Centre, University Health Network, Toronto, Ontario, Canada.
  • Ding L; Department of Otolaryngology-Head and Neck Surgery, University of Toronto, Toronto, Ontario, Canada.
  • Chen J; TECHNA Institute, Guided Therapeutics (GTx) Program, University Health Network, Toronto, Ontario, Canada.
  • Douglas CM; Princess Margaret Cancer Centre, University Health Network, Toronto, Ontario, Canada.
  • Weersink R; Department of Otolaryngology-Head and Neck Surgery, University of Toronto, Toronto, Ontario, Canada.
  • Muhanna N; TECHNA Institute, Guided Therapeutics (GTx) Program, University Health Network, Toronto, Ontario, Canada.
  • Zheng G; Princess Margaret Cancer Centre, University Health Network, Toronto, Ontario, Canada.
  • Irish JC; Department of Otolaryngology-Head and Neck Surgery, University of Toronto, Toronto, Ontario, Canada.
Cancer Res Commun ; 4(3): 796-810, 2024 Mar 15.
Article em En | MEDLINE | ID: mdl-38421899
ABSTRACT
Photodynamic therapy (PDT) is a tissue ablation technique able to selectively target tumor cells by activating the cytotoxicity of photosensitizer dyes with light. PDT is nonsurgical and tissue sparing, two advantages for treatments in anatomically complex disease sites such as the oral cavity. We have previously developed PORPHYSOME (PS) nanoparticles assembled from chlorin photosensitizer-containing building blocks (∼94,000 photosensitizers per particle) and capable of potent PDT. In this study, we demonstrate the selective uptake and curative tumor ablation of PS-enabled PDT in three preclinical models of oral cavity squamous cell carcinoma (OCSCC) biologically relevant subcutaneous Cal-33 (cell line) and MOC22 (syngeneic) mouse models, and an anatomically relevant orthotopic VX-2 rabbit model. Tumors selectively uptake PS (10 mg/kg, i.v.) with 6-to 40-fold greater concentration versus muscle 24 hours post-injection. Single PS nanoparticle-mediated PDT (PS-PDT) treatment (100 J/cm2, 100 mW/cm2) of Cal-33 tumors yielded significant apoptosis in 65.7% of tumor cells. Survival studies following PS-PDT treatments demonstrated 90% (36/40) overall response rate across all three tumor models. Complete tumor response was achieved in 65% of Cal-33 and 91% of MOC22 tumor mouse models 14 days after PS-PDT, and partial responses obtained in 25% and 9% of Cal-33 and MOC22 tumors, respectively. In buccal VX-2 rabbit tumors, combined surface and interstitial PS-PDT (200 J total) yielded complete responses in only 60% of rabbits 6 weeks after a single treatment whereas three repeated weekly treatments with PS-PDT (200 J/week) achieved complete ablation in 100% of tumors. PS-PDT treatments were well tolerated by animals with no treatment-associated toxicities and excellent cosmetic outcomes.

SIGNIFICANCE:

PS-PDT is a safe and repeatable treatment modality for OCSCC ablation. PS demonstrated tumor selective uptake and PS-PDT treatments achieved reproducible efficacy and effectiveness in multiple tumor models superior to other clinically tested photosensitizer drugs. Cosmetic and functional outcomes were excellent, and no clinically significant treatment-associated toxicities were detected. These results are enabling of window of opportunity trials for fluorescence-guided PS-PDT in patients with early-stage OCSCC scheduled for surgery.
Assuntos

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Compostos Organotiofosforados / Fotoquimioterapia / Neoplasias Bucais / Carcinoma de Células Escamosas / Nanopartículas / Neoplasias de Cabeça e Pescoço Limite: Animals / Humans Idioma: En Revista: Cancer Res Commun Ano de publicação: 2024 Tipo de documento: Article País de afiliação: Canadá

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Compostos Organotiofosforados / Fotoquimioterapia / Neoplasias Bucais / Carcinoma de Células Escamosas / Nanopartículas / Neoplasias de Cabeça e Pescoço Limite: Animals / Humans Idioma: En Revista: Cancer Res Commun Ano de publicação: 2024 Tipo de documento: Article País de afiliação: Canadá