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  • Title: Neuroimmunomodulation in medical oncology: application of psychoneuroimmunology with subcutaneous low-dose IL-2 and the pineal hormone melatonin in patients with untreatable metastatic solid tumors.
    Author: Lissoni P, Brivio F, Fumagalli L, Messina G, Vigoré L, Parolini D, Colciago M, Rovelli F.
    Journal: Anticancer Res; 2008; 28(2B):1377-81. PubMed ID: 18505083.
    Abstract:
    BACKGROUND: Anticancer immunity is under psychoneuroendocrine regulation, mainly via the pineal gland and brain opioid system, which may stimulate and inhibit antitumor immunity respectively. Cancer-related immuno-suppression does not depend only on functional damage of immune cells, but also on alterations of systems responsible for the neuroimmunomodulation, the most frequent of wich is a decline in blood levels of the pineal hormone melatonin (MLT). PATIENTS AND METHODS: A study was performed to evaluate the influence of an exogenous administration of MLT alone or MLT plus subcutaneous (SC) low-dose interleukin-2 on tumor progression and survival time in patients with untreatable metastatic solid tumors. The study included 846 patients with metastatic solid tumor (non-small cell lung cancer or gastrointestinal tract tumors) randomized to receive the best supportive care only, supportive care plus MLT (20 mg/day, orally in the evening), or MLT plus SC low-dose IL-2 (3 MIU/day for 5 days/week, for 4 consecutive weeks). RESULTS: The MLT alone was able to induce a significant increase of disease stabilization and survival time with respect to supportive care alone. The association of lL-2 with MLT provided a further improvement in the percentage of tumor regressions and of 3-year survival with respect to MLT alone. CONCLUSION: The administration of IL-2 and the pineal hormone MLT may induce control of neolplastic growth and a prolonged survival time in patients with metastatic solid tumors, for whom no other conventional anticancer therapy is available.
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