Targeted Photodynamic Therapy Shown Highly Effective Against Prostate Cancer

Excerpt:

“Researchers presenting a preclinical study at the 2017 Annual Meeting of the Society of Nuclear Medicine and Molecular Imaging (SNMMI) demonstrated the efficacy and optimal dose for targeted photodynamic therapy (tPDT) to treat prostate cancer before and during surgery. Prostate-specific membrane antigen (PSMA) was targeted with an anti-PSMA antibody radiolabeled with the tracer indium-111 (111In) and coupled with specialized photosensitizers that cause cell destruction upon exposure to near-infrared (NIR). The combined formula is 111In-DTPA-D2B-IRDye700DX.

” ‘Coupling the photosensitizer to an imaging agent that targets PSMA on the tumor surface makes it possible to selectively and effectively destroy prostate tumor remnants and micrometastases while surrounding healthy tissues remain unaffected,’ said Susanne Lütje, MD, PhD, lead author of the study from the Department of Radiology and Nuclear Medicine at Radboud University Medical Center in Nijmegen, the Netherlands, and the Clinic for Nuclear Medicine at University Hospital Essen, Germany.”

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Phase III Results Support Novel Focal Therapy for Low-Risk Prostate Cancer

Excerpt:

“Padeliporfin vascular-targeted photodynamic therapy, a novel tissue-preserving treatment, may offer men with low-risk prostate cancer a safe and effective alternative to either active surveillance or radical therapy, according to the results of a phase III trial published in The Lancet Oncology.

“Among treatment-naïve patients with low-risk, localized prostate cancer, disease progression at 24 months was 28% among patients receiving padeliporfin vascular-targeted photodynamic therapy versus 58% in those receiving active surveillance (HR, 0.34; 95% CI, 0.24-0.46; P <.0001). The median time to progression was 28.3 months (95% CI, 26.0-30.6) versus 14.1 months (95% CI, 12.9-23.8; P <.0001), respectively.”

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Photodynamic Therapy Can Preserve Tissue in Low-Risk Prostate Cancer

Excerpt:

“Vascular-targeted photodynamic therapy with padeliporfin was significantly better than active surveillance over a 2-year period in men with low-risk localized prostate cancer, according to a new study. The treatment could allow men to avoid more radical therapy.

” ‘Focal therapy and active surveillance are both tissue-preserving strategies,’ wrote study authors led by Mark Emberton, MD, of University College London in the United Kingdom. ‘However, focal therapy differs from active surveillance in that it treats disease—by the process of selective tissue ablation—above a certain risk threshold and monitors disease below that threshold, because the latter is deemed to be clinically significant.’ ”

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First Dual-Action Compound Kills Cancer Cells, Stops Them from Spreading

“Scientists are reporting development and successful lab tests on the first potential drug to pack a lethal one-two punch against melanoma skin cancer cells. Hit number one destroys cells in the main tumor, and the second hit blocks the spread of the cancer to other sites in the body, according to their report in the journal ACS Chemical Biology.”