• J Liu, J Li, Y Fan, K Chang, X Yang, W Zhu, X Wu, and Yan Pang.
• Department of Molecule Imaging and Nuclear Medicine in Diagnosis and Treatment, National Clinical Research Center for Cancer, Key Laboratory of Cancer Prevention and Therapy, Key Laboratory of Cancer Immunology and Biotherapy, Tianjin Medical University Cancer Institute and Hospital, Tianjin, China.
• Ir J Med Sci. 2015 Jun 1; 184 (2): 457-61.

BackgroundIn addition to its direct cytotoxic effects, radiation therapy renders tumor cells more susceptible to T cell-mediated cytotoxicity by modulating cell surface molecules involved in antigen presentation. The purpose of the present study was to determine the benefit of combined 89Sr radiation and dendritic cell (DC) vaccine therapy in bone metastasis patients.MethodsPatients were treated with intravenous 89Sr at a dose of 40 μCi/kg of body weight on the first day after the peripheral blood mononuclear cell collection. Seven days later, patients received DCs once a week for 6 weeks. The first three vaccines were administered by intravenous infusion, and the last three vaccines were administered by 24-point intradermal injection. Clinical response was evaluated by the number of bone metastatic foci demonstrated on bone scintigraphy; cell-mediated cytotoxicity response was evaluated by delayed-type hypersensitivity (DTH) reaction. All treatment-related toxicities including vaccine-induced fever and 89Sr-associated hematological toxicity were carefully monitored.ResultsTwenty-six patients with histologically diagnosed with primary cancers and multiple bone metastases demonstrated on bone scintigraphy were studied. The overall survival rate was 58.3%. The total positive DTH rate was 50%. The efficiency rate for pain relief was 60% (6/10), for quantity of life was 80%, and for clinic responses was 90%. Out of 10 cases, the Grade 1 or 2 of hematological depression in 4, erythema in 1, and fever in 7 were observed.ConclusionsThe study has important implications for that combined 89Sr radiation, and DC vaccine therapy can benefit cancer patients with bone metastasis.

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