Methylation status of breast cancer resistance protein detected by methylation-specific polymerase chain reaction analysis is correlated inversely with its expression in drug-resistant lung cancer cells

: Breast Cancer Resistance Protein (BCRP) is an efflux transporter responsible for causing multidrug re-sistance(MDR). It is known to expel many potent antineoplastic drugs, owing to its efflux function. Efflux of chemothera-peutics because of BCRP develops resistance to manydrugs, leading to failure in cancer treatment. BCRP plays an important role in physiology by protecting the organism from xenobiotics and other toxins. It is a half-transporter affiliated to theATP-binding cassette (ABC) superfamily of transporters, encoded by the gene ABCG2 and functions in response to adenosine triphosphate (ATP). Regulation of BCRP expression is critically controlled at molecular levels which help in maintaining the balance of xenobiotics and nutrients inside the body. Expression of BCRP can be found in brain, liver, lung cancers and acute myeloid leukemia (AML). Moreover, it is also expressed at high levels in stem cells and many cell lines. This frequent expression of BCRP has an impact on the treatment procedures and if not scrutinized may lead to failure of many cancer therapies.

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Identification of molecular fingerprints of natural products for the inhibition of breast cancer resistance protein (BCRP)

Phytomedicine ◽

10.1016/j.phymed.2021.153523 ◽

2021 ◽

Vol 85 ◽

pp. 153523

Author(s):

Arghya Banik ◽

Kalyan Ghosh ◽

Umesh K. Patil ◽

Shovanlal Gayen

Keyword(s):

Breast Cancer ◽

Natural Products ◽

Breast Cancer Resistance Protein ◽

Cancer Resistance ◽

Molecular Fingerprints ◽

Resistance Protein

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Optimization of dose and route of administration of the P‐glycoprotein inhibitor, valspodar (PSC‐833) and the P‐glycoprotein and breast cancer resistance protein dual‐inhibitor, elacridar (GF120918) as dual infusion in rats

Pharmacology Research & Perspectives ◽

10.1002/prp2.740 ◽

2021 ◽

Vol 9 (2) ◽

Author(s):

Christopher Rowbottom ◽

Alicia Pietrasiewics ◽

Taras Tuczewycz ◽

Richard Grater ◽

Daniel Qiu ◽

...

Keyword(s):

Breast Cancer ◽

Breast Cancer Resistance Protein ◽

Route Of Administration ◽

Cancer Resistance ◽

Dual Inhibitor ◽

Psc 833 ◽

P Glycoprotein ◽

Resistance Protein

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Bisphenol A Inhibits the Transporter Function of the Blood-Brain Barrier by Directly Interacting with the ABC Transporter Breast Cancer Resistance Protein (BCRP)

International Journal of Molecular Sciences ◽

10.3390/ijms22115534 ◽

2021 ◽

Vol 22 (11) ◽

pp. 5534

Author(s):

Elin Engdahl ◽

Maarten van Schijndel ◽

Dimitrios Voulgaris ◽

Michela Di Criscio ◽

Kerry Ramsbottom ◽

...

Keyword(s):

Breast Cancer ◽

Bisphenol A ◽

Blood Brain Barrier ◽

Breast Cancer Resistance Protein ◽

Brain Barrier ◽

Production Volume ◽

Cancer Resistance ◽

Blood Brain ◽

Resistance Protein

The breast cancer resistance protein (BCRP) is an important efflux transporter in the blood-brain barrier (BBB), protecting the brain from a wide range of substances. In this study, we investigated if BCRP function is affected by bisphenol A (BPA), a high production volume chemical used in common consumer products, as well as by bisphenol F (BPF) and bisphenol S (BPS), which are used to substitute BPA. We employed a transwell-based in vitro cell model of iPSC-derived brain microvascular endothelial cells, where BCRP function was assessed by measuring the intracellular accumulation of its substrate Hoechst 33342. Additionally, we used in silico modelling to predict if the bisphenols could directly interact with BCRP. Our results showed that BPA significantly inhibits the transport function of BCRP. Additionally, BPA was predicted to bind to the cavity that is targeted by known BCRP inhibitors. Taken together, our findings demonstrate that BPA inhibits BCRP function in vitro, probably by direct interaction with the transporter. This effect might contribute to BPA’s known impact on neurodevelopment.

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