Journal
G3-GENES GENOMES GENETICS
Volume 11, Issue 2, Pages -Publisher
OXFORD UNIV PRESS INC
DOI: 10.1093/g3journal/jkaa066
Keywords
Drosophila; phagocytosis; kinase; cell death; phosphoinositide 3-kinase
Categories
Funding
- National Institutes of Health [R01 GM060574, R35 GM127338]
- GROW program
- UROP at Boston University
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This study identified novel genes required for clearance by nonprofessional phagocytes in the Drosophila ovary, revealing pathways not previously implicated in phagocytosis. Interestingly, several genes were found to affect both the clearance process in phagocytes and non-autonomously influence germline cell death. This unbiased kinase screen provided new avenues for further exploration and investigation.
Programmed cell death and cell corpse clearance are an essential part of organismal health and development. Cell corpses are often cleared away by professional phagocytes such as macrophages. However, in certain tissues, neighboring cells known as nonprofessional phagocytes can also carry out clearance functions. Here, we use the Drosophila melanogaster ovary to identify novel genes required for clearance by nonprofessional phagocytes. In the Drosophila ovary, germline cells can die at multiple time points. As death proceeds, the epithelial follicle cells act as phagocytes to facilitate the clearance of these cells. We performed an unbiased kinase screen to identify novel proteins and pathways involved in cell clearance during two death events. Of 224 genes examined, 18 demonstrated severe phenotypes during developmental death and clearance while 12 demonstrated severe phenotypes during starvation-induced cell death and clearance, representing a number of pathways not previously implicated in phagocytosis. Interestingly, it was found that several genes not only affected the clearance process in the phagocytes, but also non-autonomously affected the process by which germline cells died. This kinase screen has revealed new avenues for further exploration and investigation.
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