Precision-engineered reporter cell lines reveal ABCG2 regulation in live lung cancer cells

Biochemical Pharmacology
Daniella KovacsicsBalazs Sarkadi

Abstract

Expression of the ABCG2 multidrug transporter is a marker of cancer stem cells and a predictor of recurrent malignant disease. Understanding how human ABCG2 expression is modulated by pharmacotherapy is crucial in guiding therapeutic recommendations and may aid rational drug development. Genome edited reporter cells are useful in investigating gene regulation and visualizing protein activity in live cells but require precise targeting to preserve native regulatory regions. Here, we describe a fluorescent reporter assay that allows the noninvasive assessment of ABCG2 regulation in human lung adenocarcinoma cells. Using CRISPR-Cas9 gene editing coupled with homology-directed repair, we targeted an EGFP coding sequence to the translational start site of ABCG2, generating ABCG2 knock-out and in situ tagged ABCG2 reporter cells. Using the engineered cell lines, we show that ABCG2 is upregulated by a number of anti-cancer medications, HDAC inhibitors, hypoxia-mimicking agents and glucocorticoids, supporting a model in which ABCG2 is under the control of a general stress response. To our knowledge, this is the first description of a fluorescent reporter assay system designed to follow the endogenous regulation of a human ABC transport...Continue Reading

Citations

Oct 6, 2020·FEBS Letters·Balázs SarkadiTamás Hegedűs
Feb 1, 2021·Comparative Biochemistry and Physiology. Part B, Biochemistry & Molecular Biology·Mohammad AbbasJeffrey A Stuart
Apr 4, 2021·International Journal of Molecular Sciences·László Homolya
May 11, 2021·Frontiers in Oncology·Amrutha MohanTessy Thomas Maliekal
Jun 8, 2021·Frontiers in Oncology·Kun LiuZhi Shi
Jun 22, 2021·Frontiers in Cell and Developmental Biology·Amrutha MohanTessy Thomas Maliekal

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