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14 March 2020 : Laboratory Research  

Impact of Interferon-alpha1b (IFN-α1b) on Antitumor Immune Response: An Interpretation of the Promising Therapeutic Effect of IFN-alpha1b on Melanoma

Yu Liu1ABCEF, Jingjing Ma1CEG, Yuqi Yang1BCE, Lin Liu1EF, Guannan Zhu1AF, Xiaoxia Wang1BC, Shiyu Wang1DF, Weinan Guo1AG, Qiao Yue1BD, Tao Zhao1BD, Chunying Li1AG, Tianwen Gao1AG*, Qiong Shi1AE

DOI: 10.12659/MSM.922790

Med Sci Monit 2020; 26:e922790


BACKGROUND: Melanoma is among the most aggressive forms of cancer. Our latest retrospective analysis showed that recombinant human interferon-alpha1b (IFN-α1b) led to significantly prolonged survival with mild toxicity in patients with stage IV melanoma. Based on this clinical finding, the current study sought to investigate the influence of IFN-α1b on the antitumor immunity of melanoma, with interferon-alpha2b (IFN-α2b) used as a control.

MATERIAL AND METHODS: Peripheral blood mononuclear cells were stimulated with culture medium alone, or medium supplemented with IFN-α1b or IFN-α2b. Flow cytometry and lactate dehydrogenase release assays were used to evaluate cytotoxic effects. Flow cytometry and enzyme-linked immunospot assays were used to analyze immunoregulatory effects on natural killer (NK) cells, natural killer T (NKT) cells, CD3⁺CD8⁺ T cells, and melanoma cells. Cell Counting Kit-8 assay was performed to measure the effect on proliferation of melanoma cells in vitro.

RESULTS: IFN-α1b enhanced the activity of NK cells, NKT cells, and CD3⁺CD8⁺ T cells from melanoma patients. Compared with IFN-α2b, IFN-α1b induced a relatively lower level of programmed cell death-ligand 1 (PD-L1) in melanoma cells without affecting the expression of PD-L1 in CD3⁺CD8⁺ T cells. Additionally, IFN-α1b showed a much stronger inhibition of the proliferation of melanoma cells than IFN-α2b.

CONCLUSIONS: IFN-α1b has an immunostimulatory activity similar to IFN-α2b and possesses milder adverse effects on immune checkpoints and stronger inhibitory effects on melanoma cell growth than IFN-α2b. Therefore, IFN-α1b is a promising drug for the treatment of melanoma.

Keywords: Antigens, CD274, Immunomodulation, Interferon-alpha, Melanoma, Adult, Aged, Aged, 80 and over, Antineoplastic Agents, Apoptosis, CD8-Positive T-Lymphocytes, Cell Proliferation, Immunity, Interferon alpha-2, interferon-gamma, Leukocytes, Mononuclear, Lymphocyte Activation, Middle Aged, Natural Killer T-Cells



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Editorial: Acute Hepatitis of Unknown Origin in Children. Is Autoimmunity at Play?

Nahum Mendez-Sanchez, Shreya C. Pal
Faculty of Medicine, National Autonomous University of Mexico, Mexico City, Mexico

DOI: 10.12659/MSM.937371

Med Sci Monit 2022; 28:e937371

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Medical Science Monitor eISSN: 1643-3750
Medical Science Monitor eISSN: 1643-3750