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Abd-Ellatef GEF, Gazzano E, El-Desoky AH, Hamed AR, Kopecka J, Belisario DC, Costamagna C, S Marie MA, Fahmy SR, Abdel-Hamid AHZ, Riganti C. Glabratephrin reverses doxorubicin resistance in triple negative breast cancer by inhibiting P-glycoprotein. Pharmacol Res 2022; 175:105975. [PMID: 34785319 DOI: 10.1016/j.phrs.2021.105975] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/18/2021] [Revised: 10/27/2021] [Accepted: 11/06/2021] [Indexed: 11/28/2022]
Abstract
Triple-negative breast cancer is one of the most aggressive breast cancer. The first therapeutic option is chemotherapy, often based on anthracycline as doxorubicin. However, chemotherapy efficacy is limited in by the presence of P-glycoprotein (Pgp), a membrane transporter protein that effluxes doxorubicin, reducing its cellular accumulation and toxicity. Inhibiting Pgp activity with effective and non-toxic products is still an open challenge. In this work, we demonstrated that the natural product Glabratephrin (Glab), a prenylated flavonoid from Tephrosia purpurea with a unique chemical structure, increased doxorubicin accumulation and cytotoxicity in triple negative breast cancer cells with high levels of Pgp, characterized by both acquired or intrinsic resistance to doxorubicin. Glab also reduced the growth of Pgp-expressing tumors, without adding significant extra-toxicities to doxorubicin treatment. Interestingly, Glab did not change the expression of Pgp, but it reduced the affinity for Pgp and the efflux of doxorubicin, as suggested by the increased Km and the reduced Vmax. In silico molecular docking predicted that Glab binds two residues (phenylalanine 322, glutamine 721) localized in the transmembrane domains of Pgp, facing the extracellular environment. Moreover, site-directed mutagenesis identified glycine 185 as a critical residue mediating the reduced catalytic efficacy of Pgp elicited by Glab. We propose Glab as an effective and safe compound able to reverse doxorubicin resistance mediated by Pgp in triple negative breast cancers, opening the way to a new combinatorial approach that may improve chemotherapy efficacy in the most refractory and aggressive breast cancer.
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MESH Headings
- ATP Binding Cassette Transporter, Subfamily B, Member 1/antagonists & inhibitors
- ATP Binding Cassette Transporter, Subfamily B, Member 1/genetics
- ATP Binding Cassette Transporter, Subfamily B, Member 1/metabolism
- Animals
- Antibiotics, Antineoplastic/pharmacology
- Antibiotics, Antineoplastic/therapeutic use
- Antineoplastic Combined Chemotherapy Protocols/pharmacology
- Antineoplastic Combined Chemotherapy Protocols/therapeutic use
- Cell Line, Tumor
- Doxorubicin/pharmacology
- Doxorubicin/therapeutic use
- Drug Resistance, Neoplasm/drug effects
- Female
- Flavonoids/pharmacology
- Flavonoids/therapeutic use
- Humans
- Hypoxia-Inducible Factor 1, alpha Subunit/metabolism
- Mice, Inbred BALB C
- Triple Negative Breast Neoplasms/drug therapy
- Triple Negative Breast Neoplasms/genetics
- Triple Negative Breast Neoplasms/metabolism
- Mice
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Affiliation(s)
- Gamal Eldein Fathy Abd-Ellatef
- Department of Oncology, University of Torino, via Santena 5/bis, 10126 Torino, Italy; Therapeutic Chemistry Department, Pharmaceutical and Drug Industries Research Division, National Research Centre, 33 El Bohouth St., 12622 Dokki, Giza, Egypt
| | - Elena Gazzano
- Department of Oncology, University of Torino, via Santena 5/bis, 10126 Torino, Italy
| | - Ahmed H El-Desoky
- Pharmacognosy Department, Pharmaceutical and Drug Industries Research Division, National Research Centre, 33 El Bohouth St., 12622 Dokki, Giza, Egypt
| | - Ahmed R Hamed
- Chemistry of Medicinal Plants Department & Biology Unit of Central Laboratory, Pharmaceutical and Drug Industries Research Division, National Research Centre, 33 El Bohouth St., 12622 Dokki, Giza, Egypt
| | - Joanna Kopecka
- Department of Oncology, University of Torino, via Santena 5/bis, 10126 Torino, Italy
| | | | - Costanzo Costamagna
- Department of Oncology, University of Torino, via Santena 5/bis, 10126 Torino, Italy
| | | | - Sohair R Fahmy
- Zoology Department, Faculty of Science, Cairo University, Gamaa Street, Giza, Egypt
| | - Abdel-Hamid Z Abdel-Hamid
- Therapeutic Chemistry Department, Pharmaceutical and Drug Industries Research Division, National Research Centre, 33 El Bohouth St., 12622 Dokki, Giza, Egypt
| | - Chiara Riganti
- Department of Oncology, University of Torino, via Santena 5/bis, 10126 Torino, Italy.
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Miller MA, Weissleder R. Imaging the pharmacology of nanomaterials by intravital microscopy: Toward understanding their biological behavior. Adv Drug Deliv Rev 2017; 113:61-86. [PMID: 27266447 PMCID: PMC5136524 DOI: 10.1016/j.addr.2016.05.023] [Citation(s) in RCA: 56] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2016] [Accepted: 05/25/2016] [Indexed: 12/15/2022]
Abstract
Therapeutic nanoparticles (NPs) can deliver cytotoxic chemotherapeutics and other drugs more safely and efficiently to patients; furthermore, selective delivery to target tissues can theoretically be accomplished actively through coating NPs with molecular ligands, and passively through exploiting physiological "enhanced permeability and retention" features. However, clinical trial results have been mixed in showing improved efficacy with drug nanoencapsulation, largely due to heterogeneous NP accumulation at target sites across patients. Thus, a clear need exists to better understand why many NP strategies fail in vivo and not result in significantly improved tumor uptake or therapeutic response. Multicolor in vivo confocal fluorescence imaging (intravital microscopy; IVM) enables integrated pharmacokinetic and pharmacodynamic (PK/PD) measurement at the single-cell level, and has helped answer key questions regarding the biological mechanisms of in vivo NP behavior. This review summarizes progress to date and also describes useful technical strategies for successful IVM experimentation.
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Affiliation(s)
- Miles A Miller
- Center for Systems Biology, Massachusetts General Hospital, 185 Cambridge St, Boston, MA 02114, USA
| | - Ralph Weissleder
- Center for Systems Biology, Massachusetts General Hospital, 185 Cambridge St, Boston, MA 02114, USA; Department of Systems Biology, Harvard Medical School, 200 Longwood Ave, Boston, MA 02115, USA.
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