Next Article in Journal
Enhanced Bioavailability of Tadalafil after Intranasal Administration in Beagle Dogs
Next Article in Special Issue
Modulation of Opioid Transport at the Blood-Brain Barrier by Altered ATP-Binding Cassette (ABC) Transporter Expression and Activity
Previous Article in Journal
Brief Effect of a Small Hydrophobic Drug (Cinnarizine) on the Physicochemical Characterisation of Niosomes Produced by Thin-Film Hydration and Microfluidic Methods
Previous Article in Special Issue
The Effects of Synthetically Modified Natural Compounds on ABC Transporters
Open AccessArticle

Development of Novel Intramolecular FRET-Based ABC Transporter Biosensors to Identify New Substrates and Modulators

Department of Chemistry & Biochemistry, College of Arts and Sciences, South Dakota State University, Brookings, SD 57007, USA
*
Author to whom correspondence should be addressed.
Pharmaceutics 2018, 10(4), 186; https://doi.org/10.3390/pharmaceutics10040186
Received: 17 September 2018 / Revised: 10 October 2018 / Accepted: 12 October 2018 / Published: 13 October 2018
(This article belongs to the Special Issue ABC Transporter-Mediated Drug Disposition)
Multidrug resistance protein 1 (MRP1) can efflux a wide variety of molecules including toxic chemicals, drugs, and their derivatives out of cells. Substrates of MRP1 include anti-cancer agents, antibiotics, anti-virals, anti-human immunodeficiency virus (HIV), and many other drugs. To identify novel substrates and modulators of MRP1 by exploiting intramolecular fluorescence resonance energy transfer (FRET), we genetically engineered six different two-color MRP1 proteins by changing green fluorescent protein (GFP) insertion sites, while keeping the red fluorescent protein (RFP) at the C-terminal of MRP1. Four of six recombinant proteins showed normal expression, localization, and transport activity. We quantified intramolecular FRET using ensemble fluorescence spectroscopy in response to binding of known substrate or ATP alone, substrate/ATP, and trapping of the transporter in closed conformation by vanadate. Recombinant MRP1 proteins GR-881, GR-888, and GR-905 exhibited reproducible and higher FRET changes under all tested conditions and are very promising for use as MRP1 biosensors. Furthermore, we used GR-881 to screen 40 novel anti-cancer drugs and identified 10 hits that potentially directly interact with MRP1 and could be substrates or modulators. Profiling of drug libraries for interaction with MRP1 can provide very useful information to improve the efficacy and reduce the toxicity of various therapies. View Full-Text
Keywords: ATP-binding cassette (ABC) proteins; multidrug resistance; fluorescence resonance energy transfer; biosensors; multidrug resistance protein 1; two-color MRP1 ATP-binding cassette (ABC) proteins; multidrug resistance; fluorescence resonance energy transfer; biosensors; multidrug resistance protein 1; two-color MRP1
Show Figures

Graphical abstract

MDPI and ACS Style

Osa-Andrews, B.; Tan, K.W.; Sampson, A.; Iram, S.H. Development of Novel Intramolecular FRET-Based ABC Transporter Biosensors to Identify New Substrates and Modulators. Pharmaceutics 2018, 10, 186. https://doi.org/10.3390/pharmaceutics10040186

AMA Style

Osa-Andrews B, Tan KW, Sampson A, Iram SH. Development of Novel Intramolecular FRET-Based ABC Transporter Biosensors to Identify New Substrates and Modulators. Pharmaceutics. 2018; 10(4):186. https://doi.org/10.3390/pharmaceutics10040186

Chicago/Turabian Style

Osa-Andrews, Bremansu; Tan, Kee W.; Sampson, Angelina; Iram, Surtaj H. 2018. "Development of Novel Intramolecular FRET-Based ABC Transporter Biosensors to Identify New Substrates and Modulators" Pharmaceutics 10, no. 4: 186. https://doi.org/10.3390/pharmaceutics10040186

Find Other Styles
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Search more from Scilit
 
Search
Back to TopTop