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New Theranostic Approach in Pancreatic Cancer Treatment

by Adeline Dorcas on May 2, 2018 at 11:56 AM
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New Theranostic Approach in Pancreatic Cancer Treatment

A new diagnostic and therapeutic (theranostic) method was developed by German scientists for treating patients with ductal pancreatic adenocarcinoma, deadly cancer with a poor prognosis of five-year survival rate of less than 5 percent and inadequate treatment options. The findings of the study are reported in The Journal of Nuclear Medicine.

In early preclinical studies with animal models, the novel procedure significantly inhibited tumor growth. Focusing on the neurotensin receptor 1 (NTR1), a protein that is overexpressed in ductal pancreatic adenocarcinoma, researchers developed a DOTA-conjugated NTR1 antagonist 3BP-227 labeled with the radioisotope lutetium-177 (177Lu) to treat and monitor therapy.

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For this study, six patients with confirmed metastatic ductal pancreatic adenocarcinoma, who had exhausted all other treatment options, received 177Lu-3BP-227 as salvage therapy. Scintigraphy and single-photon emission computed tomography was used with computed tomography (SPECT/CT) to determine the tumor uptake and the patients' eligibility for treatment. If the patient's condition allowed, 18F-FDG positron emission tomography (PET)/CT imaging was performed 8-12 weeks after therapy to determine treatment efficacy.

177Lu-3BP-227 was well tolerated by all patients, with the most severe adverse reaction a reversible grade 2 anemia. One patient experienced significant improvement in symptoms and quality of life--surviving 13 months from diagnosis and 11 months from the start of 177Lu-3BP-227 therapy.
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This study provides the first clinical evidence of the feasibility of treating ductal pancreatic adenocarcinoma using 177Lu-3BP-227.

"The research presented warrants further development of 177Lu-3BP-227, to provide patients with more effective treatment and fewer side effects than cytotoxic chemotherapy," explains Christiane Sterling, Ph.D., head of Nuclear Medicine and Imaging at 3B Pharmaceuticals GmbH in Berlin, Germany.

She points out, "Exploiting a hitherto underexplored receptor; these findings broaden the scope of nuclear medicine treatment for pancreatic adenocarcinoma and potentially other indications expressing neurotensin receptors, such as Ewing sarcoma. A theranostic approach using molecular imaging to identify potential responders will allow more effective treatment of a highly underserved patient population."

Source: Eurekalert
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