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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First Clinical Trial of New Targeted Molecular Therapy in U.S. Takes Aim at Incurable Prostate Cancer

Excerpt:

“NewYork-Presbyterian and Weill Cornell Medicine have begun the first clinical trial in the United States that uses a small molecule to treat men with progressive prostate cancer that has spread beyond the prostate and is no longer responding to hormonal therapy. The Phase 1 study has completed its second round of patient enrollment, with the first six patients having undergone dosing. The researchers will be discussing the trial on June 5 at the 2017 American Society of Clinical Oncology meeting in Chicago.

“The researchers are using the small molecule Lutetium 177Lu-PSMA-617 to target prostate-specific membrane antigen (PSMA), a protein that is abundantly expressed in 85-90 percent of metastasized prostate cancers. The small molecule binds to PSMA and delivers precise radiation therapy intended to shrink the cancer — even in cases in which cells have yet to form a visible tumor on a bone or CT scan.”

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New Therapeutic Agent Proves More Effective Treatment for Advanced Prostate Cancer

Excerpt:

“A German multicenter study, initiated by the German Society of Nuclear Medicine, demonstrates that lutetium-177 (Lu-177)-labeled PSMA-617 is a promising new therapeutic agent for radioligand therapy (RLT) of patients with metastatic castration-resistant prostate cancer (mCRPC). The study is published in the January 2017 issue of the Journal of Nuclear Medicine and is the featured article.

“Prostate-specific membrane antigen (PSMA) is overexpressed in and even more so with castration-resistant disease. This makes development of new tracers for PSMA-targeted radionuclide therapies a promising treatment approach. Prostate cancer deaths are usually the result of mCRPC, and the median survival for men with mCRPC has been less than two years.”

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Novel Imaging Tools and Therapeutics Take Advantage of Prostate Cancer Biomarker


A new way to detect metastatic prostate tumors using molecular imaging has shown promise in an early phase clinical trial. The noninvasive technique takes advantage of a prostate cancer-specific marker on the surface of prostate cancer cells. Continue reading…