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    Polyploidy, a cell status defined as more than two sets of genomic DNA, is a conserved strategy across species that can increase cell size and biosynthetic production, but the functional aspects of polyploidy are nuanced and vary across cell types. Throughout Drosophila developmental stages (embryo, larva, pupa and adult), polyploid cells are present in numerous organs and help orchestrate development while contributing to normal growth, well-being and homeostasis of the organism. Conversely, increasing evidence has shown that polyploid cells are prevalent in Drosophila tumors and play important roles in tumor growth and invasiveness. Here, we summarize the genes and pathways involved in polyploidy during normal and tumorigenic development, the mechanisms underlying polyploidization, and the functional aspects of polyploidy in development, homeostasis and tumorigenesis in the Drosophila model. Copyright © 2021 Elsevier Ltd. All rights reserved.


    Caique Almeida Machado Costa, Xian-Feng Wang, Calder Ellsworth, Wu-Min Deng. Polyploidy in development and tumor models in Drosophila. Seminars in cancer biology. 2022 Jun;81:106-118

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    PMID: 34562587

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