@article{Hersperger:2024:10.7554/elife.86700.3,
author = {Hersperger, F and Meyring, T and Weber, P and Chhatbar, C and Monaco, G and Dionne, MS and Paeschke, K and Prinz, M and Groß, O and Classen, A-K and Kierdorf, K},
doi = {10.7554/elife.86700.3},
journal = {eLife},
title = {DNA damage signaling in Drosophila macrophages modulates systemic cytokine levels in response to oxidative stress},
url = {http://dx.doi.org/10.7554/elife.86700.3},
volume = {12},
year = {2024}
}

Download

TY  - JOUR
AB  - <jats:p>Environmental factors, infection, or injury can cause oxidative stress in diverse tissues and loss of tissue homeostasis. Effective stress response cascades, conserved from invertebrates to mammals, ensure reestablishment of homeostasis and tissue repair. Hemocytes, the <jats:italic>Drosophila</jats:italic> blood-like cells, rapidly respond to oxidative stress by immune activation. However, the precise signals how they sense oxidative stress and integrate these signals to modulate and balance the response to oxidative stress in the adult fly are ill-defined. Furthermore, hemocyte diversification was not explored yet on oxidative stress. Here, we employed high-throughput single nuclei RNA-sequencing to explore hemocytes and other cell types, such as fat body, during oxidative stress in the adult fly. We identified distinct cellular responder states in plasmatocytes, the <jats:italic>Drosophila</jats:italic> macrophages, associated with immune response and metabolic activation upon oxidative stress. We further define oxidative stress-induced DNA damage signaling as a key sensor and a rate-limiting step in immune-activated plasmatocytes controlling JNK-mediated release of the pro-inflammatory cytokine <jats:italic>unpaired-3</jats:italic>. We subsequently tested the role of this specific immune activated cell stage during oxidative stress and found that inhibition of DNA damage signaling in plasmatocytes, as well as JNK or upd3 overactivation, result in a higher susceptibility to oxidative stress. Our findings uncover that a balanced composition and response of hemocyte subclusters is essential for the survival of adult <jats:italic>Drosophila</jats:italic> on oxidative stress by regulating systemic cytokine levels and cross-talk to other organs, such as the fat body, to control energy mobilization.</jats:p>
AU  - Hersperger,F
AU  - Meyring,T
AU  - Weber,P
AU  - Chhatbar,C
AU  - Monaco,G
AU  - Dionne,MS
AU  - Paeschke,K
AU  - Prinz,M
AU  - Groß,O
AU  - Classen,A-K
AU  - Kierdorf,K
DO  - 10.7554/elife.86700.3
PY  - 2024///
TI  - DNA damage signaling in Drosophila macrophages modulates systemic cytokine levels in response to oxidative stress
T2  - eLife
UR  - http://dx.doi.org/10.7554/elife.86700.3
VL  - 12
ER  - 

Download