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Targeted Radionuclide Therapy of Prostate Cancer-From Basic Research to Clinical Perspectives.

ABSTRACT: Prostate cancer is the most commonly diagnosed malignancy in men and the second leading cause of cancer-related deaths in Western civilization. Although localized prostate cancer can be treated effectively in different ways, almost all patients progress to the incurable metastatic castration-resistant prostate cancer. Due to the significant mortality and morbidity rate associated with the progression of this disease, there is an urgent need for new and targeted treatments. In this review, we summarize the recent advances in research on identification of prostate tissue-specific antigens for targeted therapy, generation of highly specific and selective molecules targeting these antigens, availability of therapeutic radionuclides for widespread medical applications, and recent achievements in the development of new-generation small-molecule inhibitors and antibody-based strategies for targeted prostate cancer therapy with alpha-, beta-, and Auger electron-emitting radionuclides.

SUBMITTER: Czerwinska M

PROVIDER: S-EPMC7181060 | biostudies-literature | 2020 Apr

REPOSITORIES: biostudies-literature

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Targeted Radionuclide Therapy of Prostate Cancer-From Basic Research to Clinical Perspectives.

Czerwińska Malwina M Bilewicz Aleksander A Kruszewski Marcin M Wegierek-Ciuk Aneta A Lankoff Anna A

Molecules (Basel, Switzerland) 20200410 7

Prostate cancer is the most commonly diagnosed malignancy in men and the second leading cause of cancer-related deaths in Western civilization. Although localized prostate cancer can be treated effectively in different ways, almost all patients progress to the incurable metastatic castration-resistant prostate cancer. Due to the significant mortality and morbidity rate associated with the progression of this disease, there is an urgent need for new and targeted treatments. In this review, we sum ...[more]

PMID: 32290196

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Project description:PurposeThe folate receptor (FR) is frequently overexpressed in a variety of tumor types and, hence, an interesting target for radionuclide therapy. The aim of this study was to evaluate a new class of albumin-binding radioconjugates comprising 5-methyltetrahydrofolate (5-MTHF) as a targeting agent and to compare their properties with those of the previously established folic acid-based [177Lu]Lu-OxFol-1.Methods[177Lu]Lu-6R-RedFol-1 and [177Lu]Lu-6S-RedFol-1 were investigated in vitro using FR-positive KB tumor cells. Biodistribution studies were performed in KB tumor-bearing mice, and the areas under the curve (AUC0 → 120h) were determined for the uptake in tumors and kidneys. [177Lu]Lu-6R-RedFol-1 was compared with [177Lu]Lu-OxFol-1 in a therapy study over 8 weeks using KB tumor-bearing mice.ResultsBoth radioconjugates demonstrated similar in vitro properties as [177Lu]Lu-OxFol-1; however, the tumor uptake of [177Lu]Lu-6R-RedFol-1 and [177Lu]Lu-6S-RedFol-1 was significantly increased in comparison with [177Lu]Lu-OxFol-1. In the case of [177Lu]Lu-6S-RedFol-1, also the kidney uptake was increased; however, renal retention of [177Lu]Lu-6R-RedFol-1 was similar to that of [177Lu]Lu-OxFol-1. This led to an almost 4-fold increased tumor-to-kidney AUC0 → 120h ratio of [177Lu]Lu-6R-RedFol-1 as compared with [177Lu]Lu-6S-RedFol-1 and [177Lu]Lu-OxFol-1. At equal activity, the therapeutic effect of [177Lu]Lu-6R-RedFol-1 was better than that of [177Lu]Lu-OxFol-1, reflected by a slower tumor growth and, consequently, an increased median survival time (49 days vs. 34 days).ConclusionThis study demonstrated the promising potential of 5-MTHF-based radioconjugates for FR-targeting. Application of [177Lu]Lu-6R-RedFol-1 resulted in unprecedentedly high tumor-to-kidney ratios and, as a consequence, a superior therapeutic effect as compared with [177Lu]Lu-OxFol-1. These findings, together with the absence of early side effects, make [177Lu]Lu-6R-RedFol-1 attractive in view of a future clinical translation.

Dataset Information

Targeted Radionuclide Therapy of Prostate Cancer-From Basic Research to Clinical Perspectives.

Publications

Targeted Radionuclide Therapy of Prostate Cancer-From Basic Research to Clinical Perspectives.

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