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@ARTICLE{Eid:303468,
author = {M. Eid$^*$ and U. Barayeu$^*$ and T. Dick$^*$},
title = {{C}hemogenetic detection and quantitation of {H}2{O}2 in
living cells.},
journal = {Nature protocols},
volume = {nn},
issn = {1754-2189},
address = {Basingstoke},
publisher = {Nature Publishing Group},
reportid = {DKFZ-2025-01665},
pages = {nn},
year = {2025},
note = {DKFZ-ZMBH Alliance / #EA:A160#LA:A160#},
abstract = {Hydrogen peroxide (H2O2) is a natural product of aerobic
metabolism. It acts as a signaling molecule and regulates
fundamental cellular functions. However, it has remained
difficult to measure intracellular H2O2 with high
specificity and in a quantitative manner. Here, we present a
detailed protocol for a chemogenetic method that enables the
detection and quantitation of H2O2 in living cells by
converting intracellular H2O2 into fluorescent or
luminescent signals. This is achieved by expressing the
engineered heme peroxidase APEX2 in cells and subcellular
locations of interest and by providing an appropriate
fluorogenic or luminogenic substrate from outside. This
method differs fundamentally from previously developed
genetically encoded H2O2 probes; those are reversible and
measure the balance between probe thiol oxidation and
reduction. By contrast, APEX2 turns over its substrate
irreversibly and therefore directly measures endogenous H2O2
availability. Our detailed step-by-step protocol covers the
generation of APEX2-expressing cell lines, the
implementation of fluorescent and luminescent measurements
and examples for application. Ectopic expression of APEX2
can be achieved in 3 days, while the actual measurements
typically require 1-2 h. This protocol is intended for
entry-level scientists.},
subtyp = {Review Article},
cin = {A160},
ddc = {610},
cid = {I:(DE-He78)A160-20160331},
pnm = {311 - Zellbiologie und Tumorbiologie (POF4-311)},
pid = {G:(DE-HGF)POF4-311},
typ = {PUB:(DE-HGF)16},
pubmed = {pmid:40790259},
doi = {10.1038/s41596-025-01226-9},
url = {https://inrepo02.dkfz.de/record/303468},
}