Imperial College London


Faculty of Natural SciencesDepartment of Physics

Professor of Physics and Vice Dean (Research) - FoNS



+44 (0)20 7594 7706paul.french Website




Ms Judith Baylis +44 (0)20 7594 7713




609Blackett LaboratorySouth Kensington Campus






BibTex format

author = {Sparks, H and Kondo, H and Hooper, S and Munro, I and Kennedy, G and Dunsby, C and French, P and Sahai, E},
doi = {10.1038/s41467-018-04820-6},
journal = {Nature Communications},
title = {Heterogeneity in tumor chromatin-doxorubicin binding revealed by in vivo fluorescence lifetime imaging confocal endomicroscopy},
url = {},
volume = {9},
year = {2018}

RIS format (EndNote, RefMan)

AB - We present an approach to quantify drug-target engagement using in vivo fluorescence endomicroscopy, validated with in vitro measurements. Doxorubicin binding to chromatin changes the fluorescence lifetime of histone-GFP fusions that we measure in vivo at single-cell resolution using a confocal laparo/endomicroscope. We measure both intra- and inter-tumor heterogeneity in doxorubicin chromatin engagement in a model of peritoneal metastasis of ovarian cancer, revealing striking variation in the efficacy of doxorubicin-chromatin binding depending on intra-peritoneal or intravenous delivery. Further, we observe significant variations in doxorubicin-chromatin binding between different metastases in the same mouse and between different regions of the same metastasis. The quantitative nature of fluorescence lifetime imaging enables direct comparison of drug-target engagement for different drug delivery routes and between in vitro and in vivo experiments. This uncovers different rates of cell killing for the same level of doxorubicin binding in vitro and in vivo.
AU - Sparks,H
AU - Kondo,H
AU - Hooper,S
AU - Munro,I
AU - Kennedy,G
AU - Dunsby,C
AU - French,P
AU - Sahai,E
DO - 10.1038/s41467-018-04820-6
PY - 2018///
SN - 2041-1723
TI - Heterogeneity in tumor chromatin-doxorubicin binding revealed by in vivo fluorescence lifetime imaging confocal endomicroscopy
T2 - Nature Communications
UR -
UR -
UR -
VL - 9
ER -