Innate immune cells are dispensable for regenerative growth of imaginal discs.

Abstract:

:Following tissue damage the immune response, including inflammation, has been considered an inevitable condition to build the host defense against invading pathogens. The recruitment of innate immune leukocytes to injured tissue is observed in both vertebrates and invertebrates. However, it is still not conclusive whether the inflammatory response is also indispensable for the wound healing process by itself, in addition to its role in microbial clearance. In this study we determine the requirement of innate immune cells, both hemocytes and fat body cells, in Drosophila imaginal disc regeneration. We investigate wound healing and regenerative cell proliferation of damaged imaginal discs under immunodeficient conditions. To delay development of Drosophila at matured third instar larval stage we used a sterol-mutant erg2 knock-out yeast strain in the medium. This dietary-controlled developmental arrest allowed us to generate larvae free of immune cells without interfering with their larval development. In addition, this approach allowed uncoupling regenerative cell proliferation of damaged discs from their normal developmental growth. We furthermore examined the regenerative cell proliferation of fragmented imaginal discs by transplantation into host flies deficient of immune cells. We demonstrate that the damaged/fragmented discs in immune cells deficient conditions still exhibit regenerative cell proliferation comparable to those of control samples. These results suggest that recruitment of immune cells is not a prerequisite for the regenerative growth of damaged imaginal discs.

journal_name

Mech Dev

authors

Katsuyama T,Paro R

doi

10.1016/j.mod.2012.11.005

subject

Has Abstract

pub_date

2013-02-01 00:00:00

pages

112-21

issue

2-3

eissn

0925-4773

issn

1872-6356

pii

S0925-4773(12)00116-5

journal_volume

130

pub_type

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