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Integrative Cancer Therapies 2018-09

In Vivo Antitumor Effects of MK615 Led by PD-L1 Downregulation.

Samo registrirani uporabniki lahko prevajajo članke
Prijava / prijava
Povezava se shrani v odložišče
Masashi Yanaki
Masayuki Kobayashi
Atsushi Aruga
Minoru Nomura
Makoto Ozaki

Ključne besede

Povzetek

MK615 extracted from Prunus mume was reported to have anti-inflammatory effects. In this article, we examined the in vivo antitumor effect of MK615 (an extract from Japanese apricot) using mouse tumor xenografts and focusing on the downregulation of PD-L1 (programmed death-ligand 1), a ligand of programmed cell death-1, a surface protein of activated T cells.

B16/BL6 melanoma cells were injected into C57BL/6 or BALB/c-nu/nu mice to establish lung metastasis. BALB/c-nu/nu mice (nude mice) were used as a T cell-deficient model. The mice were given MK615 or saline orally every other day for approximately 8 weeks, and their survival was observed. NF-κB (nuclear factor-κB) and PD-L1 expressions of metastatic lung tissues were also examined.

The survival rate was improved only in the MK615-treated C57BL/6 mice ( P < .05), not in the saline-given control mice or BALB/c-nu/nu mice. The downregulations of NF-κB and PD-L1 were observed in both MK615-treated C57BL/6 and BALB/c-nu/nu mice. These results suggest that the antitumor effects of MK615 are associated with T cell-mediated immunity activated by MK-615-induced PD-L1 downregulation in tumor cells.

MK615 is beneficial for a prolonged host survival time in the B16/BL6 melanoma xenograft model associated with T cell-mediated antitumor immunity.

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