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Targeted Treatments in Cancer 2.0

A special issue of International Journal of Molecular Sciences (ISSN 1422-0067). This special issue belongs to the section "Molecular Oncology".

Deadline for manuscript submissions: 30 September 2024 | Viewed by 1463

Special Issue Editor


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Guest Editor
Institute for Radiation Sciences, Osaka University, 2-4 Suita, Osaka 565-0871, Japan
Interests: biochemistry; radiobiology; pharmacology; molecular science; radiochemistry
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

This Special Issue is a continuation of our previous Special Issue, entitled "Targeted Treatments in Cancer".

In recent years, the survival rate of cancer patients has increased, due to the development of various treatments. However, some cancers, such as pancreatic cancer, are extremely resistant to treatment. One approach uses antibodies or chemicals conjugated to radionuclides, which provide specific radiotherapy. Several cancer-specific molecular targets (such as LAT1, highly expressed in tumor tissues) have been selected, and antibodies (i.e., 90Y-CD20 and 111In-CD20 antibodies, Zevalin®) have also been selected. Nuclear medicine treatment is less invasive than surgery, and is suitable for difficult-to-treat cancer cases. In particular, targeted α therapy (TAT) involves the selective delivery of α-emitters to tumors, using high linear energy transfer (LET) α-particles, while minimizing the damage caused to surrounding tissues. Radium-223 (223Ra) dichloride has been employed as a treatment for bone metastasis (i.e., Xofigo®), as well as for pain management. Radiopharmaceuticals constitute a practical and effective treatment, albeit with their restrictions. Actinium-225 (225At) and astatine-211 (211At) are promising radionuclides for TAT.We focus on researching the usefulness of nuclear medicine treatments, and we aim to drive the development of novel therapeutic agents. Since molecular biology and basic scientific studies are indispensable for the development of technology in nuclear medicine, we will prioritize basic research over clinical trials/data. 

Prof. Dr. Kazuko Kaneda-Nakashima
Guest Editor

Manuscript Submission Information

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Keywords

  • TAT (targeting alpha therapy)
  • nuclear medicine
  • cancer treatment
  • imaging
  • radioisotope (RI)
  • surface marker
  • TRT (targeted radioisotope therapy)

Published Papers (1 paper)

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Research

21 pages, 10740 KiB  
Article
225Ac-iPSMA-RGD for Alpha-Therapy Dual Targeting of Stromal/Tumor Cell PSMA and Integrins
by Blanca Ocampo-García, Pedro Cruz-Nova, Nallely Jiménez-Mancilla, Myrna Luna-Gutiérrez, Rigoberto Oros-Pantoja, Nancy Lara-Almazán, Diana Pérez-Velasco, Clara Santos-Cuevas and Guillermina Ferro-Flores
Int. J. Mol. Sci. 2023, 24(23), 16553; https://doi.org/10.3390/ijms242316553 - 21 Nov 2023
Viewed by 997
Abstract
Prostate-specific membrane antigens (PSMAs) are frequently overexpressed in both tumor stromal endothelial cells and malignant cells (stromal/tumor cells) of various cancers. The RGD (Arg-Gly-Asp) peptide sequence can specifically detect integrins involved in tumor angiogenesis. This study aimed to preclinically evaluate the cytotoxicity, biokinetics, [...] Read more.
Prostate-specific membrane antigens (PSMAs) are frequently overexpressed in both tumor stromal endothelial cells and malignant cells (stromal/tumor cells) of various cancers. The RGD (Arg-Gly-Asp) peptide sequence can specifically detect integrins involved in tumor angiogenesis. This study aimed to preclinically evaluate the cytotoxicity, biokinetics, dosimetry, and therapeutic efficacy of 225Ac-iPSMA-RGD to determine its potential as an improved radiopharmaceutical for alpha therapy compared with the 225Ac-iPSMA and 225Ac-RGD monomers. HEHA-HYNIC-iPSMA-RGD (iPSMA-RGD) was synthesized and characterized by FT-IR, UV-vis, and UPLC mass spectroscopy. The cytotoxicity of 225Ac-iPSMA-RGD was assessed in HCT116 colorectal cancer cells. Biodistribution, biokinetics, and therapeutic efficacy were evaluated in nude mice with induced HCT116 tumors. In vitro results showed increased DNA double-strand breaks through ROS generation, cell apoptosis, and death in HCT116 cells treated with 225Ac-iPSMA-RGD. The results also demonstrated in vivo cytotoxicity in cancer cells after treatment with 225Ac-iPSMA-RGD and biokinetic and dosimetric properties suitable for alpha therapy, delivering ablative radiation doses up to 237 Gy/3.7 kBq to HCT116 tumors in mice. Given the phenotype of HCT116 cancer cells, the results of this study warrant further dosimetric and clinical studies to determine the potential of 225Ac-iPSMA-RGD in the treatment of colorectal cancer. Full article
(This article belongs to the Special Issue Targeted Treatments in Cancer 2.0)
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