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Zhang M, Nagaosa K, Nakai Y, Yasugi T, Kushihiki M, Rahmatika D, Sato M, Shiratsuchi A, Nakanishi Y. Role for phagocytosis in the prevention of neoplastic transformation in Drosophila. Genes Cells 2020; 25:675-684. [PMID: 32865275 DOI: 10.1111/gtc.12804] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2020] [Revised: 08/18/2020] [Accepted: 08/22/2020] [Indexed: 01/08/2023]
Abstract
Immunity is considered to be involved in the prevention of cancer. Although both humoral and cellular immune reactions may participate, underlying mechanisms have yet to be clarified. The present study was conducted to clarify this issue using a Drosophila model, in which neoplastic transformation was induced through the simultaneous inhibition of cell-cycle checkpoints and apoptosis. We first determined the location of hemocytes, blood cells of Drosophila playing a role of immune cells, in neoplasia-induced and normal larvae, but there was no significant difference between the two groups. When gene expression pattern in larval hemocytes was determined, the expression of immunity-related genes including those necessary for phagocytosis was reduced in the neoplasia model. We then asked the involvement of phagocytosis in the prevention of neoplasia examining animals where the expression of engulfment receptors instead of apoptosis was retarded. We found that the inhibition of engulfment receptor expression augmented the occurrence of neoplasia induced by a defect in cell-cycle checkpoints. This suggested a role for phagocytosis in the prevention of neoplastic transformation in Drosophila.
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Affiliation(s)
- Min Zhang
- Graduate School of Medical Sciences, Kanazawa University, Kanazawa, Japan
| | - Kaz Nagaosa
- Section of Food Sciences, Institute of Regional Innovation, Hirosaki University, Aomori, Japan
| | - Yuji Nakai
- Section of Food Sciences, Institute of Regional Innovation, Hirosaki University, Aomori, Japan
| | - Tetsuo Yasugi
- Mathematical Neuroscience Unit, Institute for Frontier Science Initiative, Kanazawa University, Kanazawa, Japan
| | - Masako Kushihiki
- Section of Food Sciences, Institute of Regional Innovation, Hirosaki University, Aomori, Japan
| | - Dini Rahmatika
- Graduate School of Medical Sciences, Kanazawa University, Kanazawa, Japan
| | - Makoto Sato
- Mathematical Neuroscience Unit, Institute for Frontier Science Initiative, Kanazawa University, Kanazawa, Japan
| | - Akiko Shiratsuchi
- Department of Liberal Arts and Sciences, Center for Medical Education, Sapporo Medical University, Sapporo, Japan
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