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Tuffour I, Amuzu S, Bayoumi H, Surtaj I, Parrish C, Willand-Charnley R. Early in vitro evidence indicates that deacetylated sialic acids modulate multi-drug resistance in colon and lung cancers via breast cancer resistance protein. Front Oncol 2023; 13:1145333. [PMID: 37377914 PMCID: PMC10291187 DOI: 10.3389/fonc.2023.1145333] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2023] [Accepted: 05/30/2023] [Indexed: 06/29/2023] Open
Abstract
Cancers utilize sugar residues to engage in multidrug resistance. The underlying mechanism of action involving glycans, specifically the glycan sialic acid (Sia) and its various functional group alterations, has not been explored. ATP-binding cassette (ABC) transporter proteins, key proteins utilized by cancers to engage in multidrug resistant (MDR) pathways, contain Sias in their extracellular domains. The core structure of Sia can contain a variety of functional groups, including O-acetylation on the C6 tail. Modulating the expression of acetylated-Sias on Breast Cancer Resistance Protein (BCRP), a significant ABC transporter implicated in MDR, in lung and colon cancer cells directly impacted the ability of cancer cells to either retain or efflux chemotherapeutics. Via CRISPR-Cas-9 gene editing, acetylation was modulated by the removal of CAS1 Domain-containing protein (CASD1) and Sialate O-Acetyl esterase (SIAE) genes. Using western blot, immunofluorescence, gene expression, and drug sensitivity analysis, we confirmed that deacetylated Sias regulated a MDR pathway in colon and lung cancer in early in vitro models. When deacetylated Sias were expressed on BCRP, colon and lung cancer cells were able to export high levels of BCRP to the cell's surface, resulting in an increased BCRP efflux activity, reduced sensitivity to the anticancer drug Mitoxantrone, and high proliferation relative to control cells. These observations correlated with increased levels of cell survival proteins, BcL-2 and PARP1. Further studies also implicated the lysosomal pathway for the observed variation in BCRP levels among the cell variants. RNASeq data analysis of clinical samples revealed higher CASD1 expression as a favorable marker of survival in lung adenocarcinoma. Collectively, our findings indicate that deacetylated Sia is utilized by colon and lung cancers to engage in MDR via overexpression and efflux action of BCRP.
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Affiliation(s)
- Isaac Tuffour
- Department of Chemistry and Biochemistry, South Dakota State University, Brookings, SD, United States
| | - Setor Amuzu
- Department of Human Genetics, McGill University, Montreal, QC, Canada
| | - Hala Bayoumi
- Department of Chemistry and Biochemistry, South Dakota State University, Brookings, SD, United States
| | - Iram Surtaj
- Department of Medical Sciences, American University of Iraq, Sulaimani, Iraq
| | - Colin Parrish
- Baker Institute for Animal Health, Department of Microbiology and Immunology College of Veterinary Medicine, Cornell University, Ithaca, NY, United States
| | - Rachel Willand-Charnley
- Department of Chemistry and Biochemistry, South Dakota State University, Brookings, SD, United States
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2
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Yamamoto D, Hongo H, Kosaka T, Aoki N, Oya M, Sato T. The sialyl-Tn antigen synthase genes regulates migration-proliferation dichotomy in prostate cancer cells under hypoxia. Glycoconj J 2023; 40:199-212. [PMID: 36806956 DOI: 10.1007/s10719-023-10104-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2022] [Revised: 01/07/2023] [Accepted: 01/18/2023] [Indexed: 02/21/2023]
Abstract
A low-oxygen (hypoxia) tumor microenvironment can facilitate chemotherapy and radiation therapy resistance in tumors and is associated with a poor prognosis. Hypoxia also affects PCa (prostate cancer) phenotype transformation and causes therapeutic resistance. Although O-glycans are known to be involved in the malignancy of various cancers under hypoxia, the expression and function of O-glycans in PCa are not well understood. In this study, the saccharide primer method was employed to analyze O-glycan expression in PCa cells. Results showed that the expression of sTn antigens was increased in PCa cells under hypoxia. Furthermore, it was found that ST6GalNAc1, the sTn antigen synthase gene, was involved in the migration-proliferation dichotomy and drug resistance in PCa cells under hypoxia. The results of this study will contribute to the development of novel diagnostic markers and drug targets for PCa under hypoxia.
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Affiliation(s)
- Daiki Yamamoto
- Department of Biosciences and Informatics, Faculty of Science and Technology, Keio University, 223-8522, Kanagawa, Japan
| | - Hiroshi Hongo
- Department of Urology, Keio University School of Medicine, 160-8582, Tokyo, Japan
| | - Takeo Kosaka
- Department of Urology, Keio University School of Medicine, 160-8582, Tokyo, Japan
| | - Natsumi Aoki
- Department of Urology, Keio University School of Medicine, 160-8582, Tokyo, Japan
| | - Mototsugu Oya
- Department of Urology, Keio University School of Medicine, 160-8582, Tokyo, Japan
| | - Toshinori Sato
- Department of Biosciences and Informatics, Faculty of Science and Technology, Keio University, 223-8522, Kanagawa, Japan.
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3
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Eng ME, Imperio GE, Bloise E, Matthews SG. ATP-binding cassette (ABC) drug transporters in the developing blood-brain barrier: role in fetal brain protection. Cell Mol Life Sci 2022; 79:415. [PMID: 35821142 PMCID: PMC11071850 DOI: 10.1007/s00018-022-04432-w] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2022] [Revised: 05/27/2022] [Accepted: 06/15/2022] [Indexed: 12/19/2022]
Abstract
The blood-brain barrier (BBB) provides essential neuroprotection from environmental toxins and xenobiotics, through high expression of drug efflux transporters in endothelial cells of the cerebral capillaries. However, xenobiotic exposure, stress, and inflammatory stimuli have the potential to disrupt BBB permeability in fetal and post-natal life. Understanding the role and ability of the BBB in protecting the developing brain, particularly with respect to drug/toxin transport, is key to promoting long-term brain health. Drug transporters, particularly P-gp and BCRP are expressed in early gestation at the developing BBB and have a crucial role in developmental homeostasis and fetal brain protection. We have highlighted several factors that modulate drug transporters at the developing BBB, including synthetic glucocorticoid (sGC), cytokines, maternal infection, and growth factors. Some factors have the potential to increase expression and function of drug transporters and increase brain protection (e.g., sGC, transforming growth factor [TGF]-β). However, others inhibit drug transporters expression and function at the BBB, increasing brain exposure to xenobiotics (e.g., tumor necrosis factor [TNF], interleukin [IL]-6), negatively impacting brain development. This has implications for pregnant women and neonates, who represent a vulnerable population and may be exposed to drugs and environmental toxins, many of which are P-gp and BCRP substrates. Thus, alterations in regulated transport across the developing BBB may induce long-term changes in brain health and compromise pregnancy outcome. Furthermore, a large portion of neonatal adverse drug reactions are attributed to agents that target or access the nervous system, such as stimulants (e.g., caffeine), anesthetics (e.g., midazolam), analgesics (e.g., morphine) and antiretrovirals (e.g., Zidovudine); thus, understanding brain protection is key for the development of strategies to protect the fetal and neonatal brain.
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Affiliation(s)
- Margaret E Eng
- Department of Physiology, Temerty Faculty of Medicine, University of Toronto, Medical Sciences Bldg. Rm. 3207. 1 King's College Circle, Toronto, ON, M5S 1A8, Canada
| | | | - Enrrico Bloise
- Department of Physiology, Temerty Faculty of Medicine, University of Toronto, Medical Sciences Bldg. Rm. 3207. 1 King's College Circle, Toronto, ON, M5S 1A8, Canada
- Lunenfeld-Tanenbaum Research Institute, Sinai Health, Toronto, Canada
- Department of Morphology, Federal University of Minas Gerais, Belo Horizonte, Brazil
| | - Stephen G Matthews
- Department of Physiology, Temerty Faculty of Medicine, University of Toronto, Medical Sciences Bldg. Rm. 3207. 1 King's College Circle, Toronto, ON, M5S 1A8, Canada.
- Lunenfeld-Tanenbaum Research Institute, Sinai Health, Toronto, Canada.
- Department of Obstetrics and Gynecology, Temerty Faculty of Medicine, University of Toronto, Toronto, Canada.
- Department of Medicine, Temerty Faculty of Medicine, University of Toronto, Toronto, Canada.
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4
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Pulukuri AJ, Burt AJ, Opp LK, McDowell CM, Davaritouchaee M, Nielsen AE, Mancini RJ. Acquired Drug Resistance Enhances Imidazoquinoline Efflux by P-Glycoprotein. Pharmaceuticals (Basel) 2021; 14:ph14121292. [PMID: 34959691 PMCID: PMC8705394 DOI: 10.3390/ph14121292] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2021] [Revised: 12/04/2021] [Accepted: 12/07/2021] [Indexed: 02/07/2023] Open
Abstract
Multidrug-Resistant (MDR) cancers attenuate chemotherapeutic efficacy through drug efflux, a process that transports drugs from within a cell to the extracellular space via ABC (ATP-Binding Cassette) transporters, including P-glycoprotein 1 (P-gp or ABCB1/MDR1). Conversely, Toll-Like Receptor (TLR) agonist immunotherapies modulate activity of tumor-infiltrating immune cells in local proximity to cancer cells and could, therefore, benefit from the enhanced drug efflux in MDR cancers. However, the effect of acquired drug resistance on TLR agonist efflux is largely unknown. We begin to address this by investigating P-gp mediated efflux of TLR 7/8 agonists. First, we used functionalized liposomes to determine that imidazoquinoline TLR agonists Imiquimod, Resiquimod, and Gardiquimod are substrates for P-gp. Interestingly, the least potent imidazoquinoline (Imiquimod) was the best P-gp substrate. Next, we compared imidazoquinoline efflux in MDR cancer cell lines with enhanced P-gp expression relative to parent cancer cell lines. Using P-gp competitive substrates and inhibitors, we observed that imidazoquinoline efflux occurs through P-gp and, for Imiquimod, is enhanced as a consequence of acquired drug resistance. This suggests that enhancing efflux susceptibility could be an important consideration in the rational design of next generation immunotherapies that modulate activity of tumor-infiltrating immune cells.
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Affiliation(s)
- Anunay J. Pulukuri
- Department of Chemistry, Washington State University, Pullman, WA 99164, USA; (A.J.P.); (A.J.B.); (L.K.O.); (M.D.); (A.E.N.)
| | - Anthony J. Burt
- Department of Chemistry, Washington State University, Pullman, WA 99164, USA; (A.J.P.); (A.J.B.); (L.K.O.); (M.D.); (A.E.N.)
- Department of Chemistry & Biochemistry, San Diego State University, San Diego, CA 92182, USA
| | - Larissa K. Opp
- Department of Chemistry, Washington State University, Pullman, WA 99164, USA; (A.J.P.); (A.J.B.); (L.K.O.); (M.D.); (A.E.N.)
| | - Colin M. McDowell
- School of Molecular Biosciences, Washington State University, Pullman, WA 99164, USA;
| | - Maryam Davaritouchaee
- Department of Chemistry, Washington State University, Pullman, WA 99164, USA; (A.J.P.); (A.J.B.); (L.K.O.); (M.D.); (A.E.N.)
- Department of Food Science, Cornell University, Ithaca, NY 14853, USA
- The Gene & Linda Voiland School of Chemical Engineering and Bioengineering, Washington State University, Pullman, WA 99164, USA
| | - Amy E. Nielsen
- Department of Chemistry, Washington State University, Pullman, WA 99164, USA; (A.J.P.); (A.J.B.); (L.K.O.); (M.D.); (A.E.N.)
| | - Rock J. Mancini
- Department of Chemistry, Washington State University, Pullman, WA 99164, USA; (A.J.P.); (A.J.B.); (L.K.O.); (M.D.); (A.E.N.)
- The Gene & Linda Voiland School of Chemical Engineering and Bioengineering, Washington State University, Pullman, WA 99164, USA
- Correspondence:
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5
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Aranha ESP, Portilho AJDS, Bentes de Sousa L, da Silva EL, Mesquita FP, Rocha WC, Araújo da Silva FM, Lima ES, Alves APNN, Koolen HHF, Montenegro RC, Vasconcellos MCD. 22β-hydroxytingenone induces apoptosis and suppresses invasiveness of melanoma cells by inhibiting MMP-9 activity and MAPK signaling. JOURNAL OF ETHNOPHARMACOLOGY 2021; 267:113605. [PMID: 33232779 DOI: 10.1016/j.jep.2020.113605] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/29/2020] [Revised: 11/11/2020] [Accepted: 11/17/2020] [Indexed: 06/11/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE 22β-hydroxytingenone (22-HTG) is a quinonemethide triterpene isolated from Salacia impressifolia (Miers) A. C. Smith (family Celastraceae), which has been used in traditional medicine to treat a variety of diseases, including dengue, renal infections, rheumatism and cancer. However, the anticancer effects of 22-HTG and the underlying molecular mechanisms in melanoma cells have not yet been elucidated. AIM OF THE STUDY The present study investigated apoptosis induction and antimetastatic potencial of 22-HTG in SK-MEL-28 human melanoma cells. MATERIALS AND METHODS First, the in vitro cytotoxic activity of 22-HTG in cultured cancer cells was evaluated. Then, cell viability was determined using the trypan blue assay in melanoma cells (SK-MEL-28), which was followed by cell cycle, annexin V-FITC/propidium iodide assays (Annexin/PI), as well as assays to evaluate mitochondrial membrane potential, production of reactive oxygen species (ROS) using flow cytometry. Fluorescence microscopy using acridine orange/ethidium bromide (AO/BE) staining was also performed. RT-qPCR was carried out to evaluate the expression of BRAF, NRAS, and KRAS genes. The anti-invasiveness potential of 22-HTG was evaluated in a three-dimensional (3D) model of reconstructed human skin. RESULTS 22-HTG reduced viability of SK-MEL-28 cells and caused morphological changes, as cell shrinkage, chromatin condensation, and nuclear fragmentation. Furthermore, 22-HTG caused apoptosis, which was demonstrated by increased staining with AO/BE and Annexin/PI. The apoptosis may have been caused by mitochondrial instability without the involvement of ROS production. The expression of BRAF, NRAS, and KRAS, which are important biomarkers in melanoma development, was reduced by the 22-HTG treatment. In the reconstructed skin model, 22-HTG was able to decrease the invasion capacity of melanoma cells in the dermis. CONCLUSIONS Our data indicate that 22-HTG has anti-tumorigenic properties against melanoma cells through the induction of cell cycle arrest, apoptosis and inhibition of invasiveness potential, as observed in the 3D model. As such, the results provide new insights for future work on the utilization of 22-HTG in malignant melanoma treatment.
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Affiliation(s)
- Elenn Suzany Pereira Aranha
- Faculty of Pharmaceutical Sciences, Post Graduate Program in Biodiversity and Biotechnology of the Amazon (Bionorte), Federal University of Amazonas, Manaus, Amazonas, 69080-900, Brazil.
| | | | - Leilane Bentes de Sousa
- Faculty of Pharmaceutical Sciences, Federal University of Amazonas, Manaus, Amazonas, 69080-900, Brazil.
| | - Emerson Lucena da Silva
- Drug Research and Development Center (NPDM), Federal University of Ceará, Fortaleza, Ceará, 60430-275, Brazil.
| | - Felipe Pantoja Mesquita
- Drug Research and Development Center (NPDM), Federal University of Ceará, Fortaleza, Ceará, 60430-275, Brazil.
| | - Waldireny C Rocha
- Health and Biotechnology Institute, Federal University of Amazonas, Coari, Amazonas, 69460-000, Brazil.
| | | | - Emerson Silva Lima
- Faculty of Pharmaceutical Sciences, Federal University of Amazonas, Manaus, Amazonas, 69080-900, Brazil.
| | | | | | - Raquel Carvalho Montenegro
- Drug Research and Development Center (NPDM), Federal University of Ceará, Fortaleza, Ceará, 60430-275, Brazil.
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6
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Kori M, Aydin B, Gulfidan G, Beklen H, Kelesoglu N, Caliskan Iscan A, Turanli B, Erzik C, Karademir B, Arga KY. The Repertoire of Glycan Alterations and Glycoproteins in Human Cancers. OMICS-A JOURNAL OF INTEGRATIVE BIOLOGY 2021; 25:139-168. [PMID: 33404348 DOI: 10.1089/omi.2020.0210] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Cancer as the leading cause of death worldwide has many issues that still need to be addressed. Since the alterations on the glycan compositions or/and structures (i.e., glycosylation, sialylation, and fucosylation) are common features of tumorigenesis, glycomics becomes an emerging field examining the structure and function of glycans. In the past, cancer studies heavily relied on genomics and transcriptomics with relatively little exploration of the glycan alterations and glycoprotein biomarkers among individuals and populations. Since glycosylation of proteins increases their structural complexity by several orders of magnitude, glycome studies resulted in highly dynamic biomarkers that can be evaluated for cancer diagnosis, prognosis, and therapy. Glycome not only integrates our genetic background with past and present environmental factors but also offers a promise of more efficient patient stratification compared with genetic variations. Therefore, studying glycans holds great potential for better diagnostic markers as well as developing more efficient treatment strategies in human cancers. While recent developments in glycomics and associated technologies now offer new possibilities to achieve a high-throughput profiling of glycan diversity, we aim to give an overview of the current status of glycan research and the potential applications of the glycans in the scope of the personalized medicine strategies for cancer.
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Affiliation(s)
- Medi Kori
- Department of Bioengineering, Faculty of Engineering, Marmara University, Istanbul, Turkey
| | - Busra Aydin
- Department of Bioengineering, Faculty of Engineering, Marmara University, Istanbul, Turkey
| | - Gizem Gulfidan
- Department of Bioengineering, Faculty of Engineering, Marmara University, Istanbul, Turkey
| | - Hande Beklen
- Department of Bioengineering, Faculty of Engineering, Marmara University, Istanbul, Turkey
| | - Nurdan Kelesoglu
- Department of Bioengineering, Faculty of Engineering, Marmara University, Istanbul, Turkey
| | - Ayşegul Caliskan Iscan
- Department of Bioengineering, Faculty of Engineering, Marmara University, Istanbul, Turkey.,Department of Pharmacy, Istinye University, Istanbul, Turkey
| | - Beste Turanli
- Department of Bioengineering, Faculty of Engineering, Marmara University, Istanbul, Turkey
| | - Can Erzik
- Department of Medical Biology and School of Medicine, Marmara University, Istanbul, Turkey
| | - Betul Karademir
- Department of Biochemistry, School of Medicine, Marmara University, Istanbul, Turkey.,Genetic and Metabolic Diseases Research and Investigation Center, Marmara University, Istanbul, Turkey
| | - Kazim Yalcin Arga
- Department of Bioengineering, Faculty of Engineering, Marmara University, Istanbul, Turkey
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7
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Šereš M, Pavlíková L, Boháčová V, Kyca T, Borovská I, Lakatoš B, Breier A, Sulová Z. Overexpression of GRP78/BiP in P-Glycoprotein-Positive L1210 Cells is Responsible for Altered Response of Cells to Tunicamycin as a Stressor of the Endoplasmic Reticulum. Cells 2020; 9:cells9040890. [PMID: 32268491 PMCID: PMC7226765 DOI: 10.3390/cells9040890] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2020] [Revised: 03/25/2020] [Accepted: 03/31/2020] [Indexed: 12/12/2022] Open
Abstract
P-glycoprotein (P-gp, ABCB1 member of the ABC (ATP-binding cassette) transporter family) localized in leukemia cell plasma membranes is known to reduce cell sensitivity to a large but well-defined group of chemicals known as P-gp substrates. However, we found previously that P-gp-positive sublines of L1210 murine leukemia cells (R and T) but not parental P-gp-negative parental cells (S) are resistant to the endoplasmic reticulum (ER) stressor tunicamycin (an N-glycosylation inhibitor). Here, we elucidated the mechanism of tunicamycin resistance in P-gp-positive cells. We found that tunicamycin at a sublethal concentration of 0.1 µM induced retention of the cells in the G1 phase of the cell cycle only in the P-gp negative variant of L1210 cells. P-gp-positive L1210 cell variants had higher expression of the ER stress chaperone GRP78/BiP compared to that of P-gp-negative cells, in which tunicamycin induced larger upregulation of CHOP (C/EBP homologous protein). Transfection of the sensitive P-gp-negative cells with plasmids containing GRP78/BiP antagonized tunicamycin-induced CHOP expression and reduced tunicamycin-induced arrest of cells in the G1 phase of the cell cycle. Taken together, these data suggest that the resistance of P-gp-positive cells to tunicamycin is due to increased levels of GRP78/BiP, which is overexpressed in both resistant variants of L1210 cells.
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Affiliation(s)
- Mário Šereš
- Institute of Molecular Physiology and Genetics, Centre of Biosciences, Slovak Academy of Sciences, Dúbravská cesta 9, 840 05 Bratislava, Slovakia; (L.P.); (V.B.); (T.K.); (I.B.)
- Correspondence: (M.Š.); (A.B.); (Z.S.); Tel.: +421-2-322-95-574 (M.Š.); +421-2-593-25-514 (A.B.); +421-2-322-95-510 (Z.S.)
| | - Lucia Pavlíková
- Institute of Molecular Physiology and Genetics, Centre of Biosciences, Slovak Academy of Sciences, Dúbravská cesta 9, 840 05 Bratislava, Slovakia; (L.P.); (V.B.); (T.K.); (I.B.)
| | - Viera Boháčová
- Institute of Molecular Physiology and Genetics, Centre of Biosciences, Slovak Academy of Sciences, Dúbravská cesta 9, 840 05 Bratislava, Slovakia; (L.P.); (V.B.); (T.K.); (I.B.)
| | - Tomáš Kyca
- Institute of Molecular Physiology and Genetics, Centre of Biosciences, Slovak Academy of Sciences, Dúbravská cesta 9, 840 05 Bratislava, Slovakia; (L.P.); (V.B.); (T.K.); (I.B.)
| | - Ivana Borovská
- Institute of Molecular Physiology and Genetics, Centre of Biosciences, Slovak Academy of Sciences, Dúbravská cesta 9, 840 05 Bratislava, Slovakia; (L.P.); (V.B.); (T.K.); (I.B.)
| | - Boris Lakatoš
- Institute of Biochemistry and Microbiology, Faculty of Chemical and Food Technology, Slovak University of Technology in Bratislava, Radlinského 9, 81237 Bratislava, Slovakia;
| | - Albert Breier
- Institute of Molecular Physiology and Genetics, Centre of Biosciences, Slovak Academy of Sciences, Dúbravská cesta 9, 840 05 Bratislava, Slovakia; (L.P.); (V.B.); (T.K.); (I.B.)
- Institute of Biochemistry and Microbiology, Faculty of Chemical and Food Technology, Slovak University of Technology in Bratislava, Radlinského 9, 81237 Bratislava, Slovakia;
- Correspondence: (M.Š.); (A.B.); (Z.S.); Tel.: +421-2-322-95-574 (M.Š.); +421-2-593-25-514 (A.B.); +421-2-322-95-510 (Z.S.)
| | - Zdena Sulová
- Institute of Molecular Physiology and Genetics, Centre of Biosciences, Slovak Academy of Sciences, Dúbravská cesta 9, 840 05 Bratislava, Slovakia; (L.P.); (V.B.); (T.K.); (I.B.)
- Correspondence: (M.Š.); (A.B.); (Z.S.); Tel.: +421-2-322-95-574 (M.Š.); +421-2-593-25-514 (A.B.); +421-2-322-95-510 (Z.S.)
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8
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Wang H, Feng Z, Qin Y, Wang J, Xu B. Nucleopeptide Assemblies Selectively Sequester ATP in Cancer Cells to Increase the Efficacy of Doxorubicin. Angew Chem Int Ed Engl 2018; 57:4931-4935. [PMID: 29451962 PMCID: PMC6014697 DOI: 10.1002/anie.201712834] [Citation(s) in RCA: 55] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2017] [Revised: 02/01/2018] [Indexed: 12/20/2022]
Abstract
Herein, we report that assemblies of nucleopeptides selectively sequester ATP in complex conditions (for example, serum and cytosol). We developed assemblies of nucleopeptides that selectively sequester ATP over ADP. Counteracting enzymes interconvert ATP and ADP to modulate the nanostructures formed by the nucleopeptides and the nucleotides. The nucleopeptides, sequestering ATP effectively in cells, slow down efflux pumps in multidrug-resistant cancer cells, thus boosting the efficacy of doxorubicin, an anticancer drug. Investigation of 11 nucleopeptides (including d- and l-enantiomers) yields five more nucleopeptides that differentiate ATP and ADP through either precipitation or gelation. As the first example of assemblies of nucleopeptides that interact with ATP and disrupt intracellular ATP dynamics, this work illustrates the use of supramolecular assemblies to interact with small and essential biological molecules for controlling cell behavior.
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Affiliation(s)
- Huaimin Wang
- Department of chemistry, Brandeis University, 415 South St, Waltham, MA, 02454, USA
| | - Zhaoqianqi Feng
- Department of chemistry, Brandeis University, 415 South St, Waltham, MA, 02454, USA
| | - Yanan Qin
- Department of chemistry, Brandeis University, 415 South St, Waltham, MA, 02454, USA
| | - Jiaqing Wang
- Department of chemistry, Brandeis University, 415 South St, Waltham, MA, 02454, USA
| | - Bing Xu
- Department of chemistry, Brandeis University, 415 South St, Waltham, MA, 02454, USA
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9
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Nucleopeptide Assemblies Selectively Sequester ATP in Cancer Cells to Increase the Efficacy of Doxorubicin. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201712834] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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10
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Interplay between P-Glycoprotein Expression and Resistance to Endoplasmic Reticulum Stressors. Molecules 2018; 23:molecules23020337. [PMID: 29415493 PMCID: PMC6017601 DOI: 10.3390/molecules23020337] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2018] [Revised: 01/30/2018] [Accepted: 02/01/2018] [Indexed: 12/13/2022] Open
Abstract
Multidrug resistance (MDR) is a phenotype of cancer cells with reduced sensitivity to a wide range of unrelated drugs. P-glycoprotein (P-gp)—a drug efflux pump (ABCB1 member of the ABC transporter gene family)—is frequently observed to be a molecular cause of MDR. The drug-efflux activity of P-gp is considered as the underlying mechanism of drug resistance against P-gp substrates and results in failure of cancer chemotherapy. Several pathological impulses such as shortages of oxygen and glucose supply, alterations of calcium storage mechanisms and/or processes of protein N-glycosylation in the endoplasmic reticulum (ER) leads to ER stress (ERS), characterized by elevation of unfolded protein cell content and activation of the unfolded protein response (UPR). UPR is responsible for modification of protein folding pathways, removal of misfolded proteins by ER associated protein degradation (ERAD) and inhibition of proteosynthesis. However, sustained ERS may result in UPR-mediated cell death. Neoplastic cells could escape from the death pathway induced by ERS by switching UPR into pro survival mechanisms instead of apoptosis. Here, we aimed to present state of the art information about consequences of P-gp expression on mechanisms associated with ERS development and regulation of the ERAD system, particularly focused on advances in ERS-associated therapy of drug resistant malignancies.
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11
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Pavlikova L, Seres M, Hano M, Bohacova V, Sevcikova I, Kyca T, Breier A, Sulova Z. L1210 Cells Overexpressing ABCB1 Drug Transporters Are Resistant to Inhibitors of the N- and O-glycosylation of Proteins. Molecules 2017; 22:E1104. [PMID: 28671633 PMCID: PMC6152248 DOI: 10.3390/molecules22071104] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2017] [Revised: 06/27/2017] [Accepted: 06/28/2017] [Indexed: 12/28/2022] Open
Abstract
Overexpression of P-glycoprotein (P-gp, drug transporter) in neoplastic cells is the most frequently observed molecular cause of multidrug resistance. Here, we show that the overexpression of P-gp in L1210 cells leads to resistance to tunicamycin and benzyl 2-acetamido-2-deoxy-α-d-galactopyranoside (GalNAc-α-O-benzyl). Tunicamycin induces both glycosylation depression and ubiquitination improvement of P-gp. However, the latter is not associated with large increases in molecular mass as evidence for polyubiquitination. Therefore, P-gp continues in maturation to an active membrane efflux pump rather than proteasomal degradation. P-gp-positive L1210 cells contain a higher quantity of ubiquitin associated with cell surface proteins than their P-gp-negative counterparts. Thus, P-gp-positive cells use ubiquitin signaling for correct protein folding to a higher extent than P-gp-negative cells. Elevation of protein ubiquitination after tunicamycin treatment in these cells leads to protein folding rather than protein degradation, resulting at least in the partial lack of cell sensitivity to tunicamycin in L1210 cells after P-gp expression. In contrast to tunicamycin, to understand why P-gp-positive cells are resistant to GalNAc-α-O-benzyl, further research is needed.
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Affiliation(s)
- Lucia Pavlikova
- Institute of Molecular Physiology and Genetics, Centre of Bioscience, Slovak Academy of Sciences, Dúbravska cesta 9, 84005 Bratislava, Slovakia.
| | - Mario Seres
- Institute of Molecular Physiology and Genetics, Centre of Bioscience, Slovak Academy of Sciences, Dúbravska cesta 9, 84005 Bratislava, Slovakia.
| | - Milan Hano
- Institute of Molecular Physiology and Genetics, Centre of Bioscience, Slovak Academy of Sciences, Dúbravska cesta 9, 84005 Bratislava, Slovakia.
| | - Viera Bohacova
- Institute of Molecular Physiology and Genetics, Centre of Bioscience, Slovak Academy of Sciences, Dúbravska cesta 9, 84005 Bratislava, Slovakia.
| | - Ivana Sevcikova
- Institute of Molecular Physiology and Genetics, Centre of Bioscience, Slovak Academy of Sciences, Dúbravska cesta 9, 84005 Bratislava, Slovakia.
- Institute of Biochemistry and Microbiology, Faculty of Chemical and Food Technology, Slovak University of Technology, Radlinského 9, 81237 Bratislava, Slovakia.
| | - Tomas Kyca
- Institute of Molecular Physiology and Genetics, Centre of Bioscience, Slovak Academy of Sciences, Dúbravska cesta 9, 84005 Bratislava, Slovakia.
- Institute of Biochemistry and Microbiology, Faculty of Chemical and Food Technology, Slovak University of Technology, Radlinského 9, 81237 Bratislava, Slovakia.
| | - Albert Breier
- Institute of Biochemistry and Microbiology, Faculty of Chemical and Food Technology, Slovak University of Technology, Radlinského 9, 81237 Bratislava, Slovakia.
| | - Zdena Sulova
- Institute of Molecular Physiology and Genetics, Centre of Bioscience, Slovak Academy of Sciences, Dúbravska cesta 9, 84005 Bratislava, Slovakia.
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12
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Rosas-Ramírez DG, Fragoso-Serrano M, Escandón-Rivera S, Vargas-Ramírez AL, Reyes-Grajeda JP, Soriano-García M. Resistance-modifying Activity in Vinblastine-resistant Human Breast Cancer Cells by Oligosaccharides Obtained from Mucilage of Chia Seeds (Salvia hispanica). Phytother Res 2017; 31:906-914. [PMID: 28425219 DOI: 10.1002/ptr.5815] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2016] [Revised: 02/18/2017] [Accepted: 03/23/2017] [Indexed: 11/06/2022]
Abstract
The multidrug resistance (MDR) phenotype is considered as a major cause of the failure in cancer chemotherapy. The acquisition of MDR is usually mediated by the overexpression of drug efflux pumps of a P-glycoprotein. The development of compounds that mitigate the MDR phenotype by modulating the activity of these transport proteins is an important yet elusive target. Here, we screened the saponification and enzymatic degradation products from Salvia hispanica seed's mucilage to discover modulating compounds of the acquired resistance to chemotherapeutic in breast cancer cells. Preparative-scale recycling HPLC was used to purify the hydrolysis degradation products. All compounds were tested in eight different cancer cell lines and Vero cells. All compounds were noncytotoxic at the concentration tested against the drug-sensitive and multidrug-resistant cells (IC50 > 29.2 μM). For the all products, a moderate vinblastine-enhancing activity from 4.55-fold to 6.82-fold was observed. That could be significant from a therapeutic perspective. Copyright © 2017 John Wiley & Sons, Ltd.
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Affiliation(s)
- Daniel G Rosas-Ramírez
- Departamento de Química de Biomacromoléculas, Instituto de Química, Universidad Nacional Autónoma de México, Ciudad Universitaria, 04510, Mexico City, Mexico
| | - Mabel Fragoso-Serrano
- Departamento de Farmacia, Facultad de Química, Universidad Nacional Autónoma de México, Ciudad Universitaria, 04510, Mexico City, Mexico
| | - Sonia Escandón-Rivera
- Departamento de Biología Celular, Facultad de Ciencias, Universidad Nacional Autónoma de México, Ciudad Universitaria, 04510, Mexico City, Mexico
| | - Alba L Vargas-Ramírez
- Unidad de Proteómica Médica, Instituto Nacional de Medicina Genómica, Mexico City, 14610, DF, Mexico
| | - Juan P Reyes-Grajeda
- Unidad de Proteómica Médica, Instituto Nacional de Medicina Genómica, Mexico City, 14610, DF, Mexico
| | - Manuel Soriano-García
- Departamento de Química de Biomacromoléculas, Instituto de Química, Universidad Nacional Autónoma de México, Ciudad Universitaria, 04510, Mexico City, Mexico
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13
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Sandoval TA, Urueña CP, Llano M, Gómez-Cadena A, Hernández JF, Sequeda LG, Loaiza AE, Barreto A, Li S, Fiorentino S. Standardized Extract from Caesalpinia spinosa is Cytotoxic Over Cancer Stem Cells and Enhance Anticancer Activity of Doxorubicin. THE AMERICAN JOURNAL OF CHINESE MEDICINE 2016. [DOI: 10.1142/s0192415x16500956 pmid: 27852125] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Cancer stem cells (CSC) are the primary cell type responsible for metastasis and relapse. ABC-transporters are integral membrane proteins involved in the translocation of substrates across membranes protecting CSC from chemotherapeutic agents. A plant extract derived from C. spinosa (P2Et) previously investigated for its antitumor activity has been shown to reduce lung and spleen metastasis in mice that have been transplanted with breast cancer cells, suggesting that P2Et has a significant activity against cancer stem cells (CSC). P2Et extract was thoroughly characterized by HPLC/MS. The cytotoxicity of P2Et extract was evaluated using a MTT assay in human and murine cell lines with different profiles of resistance, by Pgp overexpression or by enrichment in cancer stem cells. The synergistic effect of P2Et with doxorubicin was evaluated in vitro in several cell lines and in vivo in mice transplanted with TS/A cells, a highly resistant cell line and enriched in CD44[Formula: see text]CD24[Formula: see text]CSC. The chromatographic fingerprint of P2Et extract revealed 13 gallotannins. We also found that P2Et extract was cytotoxic to cells regardless of their resistant phenotype. Similarly, complementary activities were observed as drug efflux reversion and antioxidant activity. Short-treatment with P2Et extract, revealed a synergistic effect with doxorubicin in resistant cell lines. In vivo the P2Et increases mice survival in a TS/A breast cancer model associated with augmentation of calreticulin expression. Our results suggest that P2Et treatment could be used as adjuvant along with conventional chemotherapy to treat tumors with a MDR phenotype or with high frequency of CSC.
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Affiliation(s)
- Tito A. Sandoval
- Department of Microbiology, Grupo de Investigación Fitoquímica Universidad Javeriana (GIFUJ), Bogotá, Colombia
| | - Claudia P. Urueña
- Department of Microbiology, Grupo de Investigación Fitoquímica Universidad Javeriana (GIFUJ), Bogotá, Colombia
| | - Mónica Llano
- Department of Microbiology, Grupo de Investigación Fitoquímica Universidad Javeriana (GIFUJ), Bogotá, Colombia
| | - Alejandra Gómez-Cadena
- Department of Microbiology, Grupo de Investigación Fitoquímica Universidad Javeriana (GIFUJ), Bogotá, Colombia
| | - John F. Hernández
- Department of Microbiology, Grupo de Investigación Fitoquímica Universidad Javeriana (GIFUJ), Bogotá, Colombia
| | - Luis Gonzalo Sequeda
- Departament of Chemistry, Pontificia Universidad Javeriana, Grupo de Investigación Fitoquímica Universidad Javeriana (GIFUJ), Bogotá, Colombia
| | - Alix E. Loaiza
- Departament of Chemistry, Pontificia Universidad Javeriana, Grupo de Investigación Fitoquímica Universidad Javeriana (GIFUJ), Bogotá, Colombia
| | - Alfonso Barreto
- Department of Microbiology, Grupo de Investigación Fitoquímica Universidad Javeriana (GIFUJ), Bogotá, Colombia
| | - Shaoping Li
- Institute of Chinese Medical Sciences, University of Macau, Macau, P.R. China
| | - Susana Fiorentino
- Department of Microbiology, Grupo de Investigación Fitoquímica Universidad Javeriana (GIFUJ), Bogotá, Colombia
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Sandoval TA, Urueña CP, Llano M, Gómez-Cadena A, Hernández JF, Sequeda LG, Loaiza AE, Barreto A, Li S, Fiorentino S. Standardized Extract from Caesalpinia spinosa is Cytotoxic Over Cancer Stem Cells and Enhance Anticancer Activity of Doxorubicin. THE AMERICAN JOURNAL OF CHINESE MEDICINE 2016; 44:1693-1717. [DOI: 10.1142/s0192415x16500956] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Cancer stem cells (CSC) are the primary cell type responsible for metastasis and relapse. ABC-transporters are integral membrane proteins involved in the translocation of substrates across membranes protecting CSC from chemotherapeutic agents. A plant extract derived from C. spinosa (P2Et) previously investigated for its antitumor activity has been shown to reduce lung and spleen metastasis in mice that have been transplanted with breast cancer cells, suggesting that P2Et has a significant activity against cancer stem cells (CSC). P2Et extract was thoroughly characterized by HPLC/MS. The cytotoxicity of P2Et extract was evaluated using a MTT assay in human and murine cell lines with different profiles of resistance, by Pgp overexpression or by enrichment in cancer stem cells. The synergistic effect of P2Et with doxorubicin was evaluated in vitro in several cell lines and in vivo in mice transplanted with TS/A cells, a highly resistant cell line and enriched in CD44[Formula: see text]CD24[Formula: see text]CSC. The chromatographic fingerprint of P2Et extract revealed 13 gallotannins. We also found that P2Et extract was cytotoxic to cells regardless of their resistant phenotype. Similarly, complementary activities were observed as drug efflux reversion and antioxidant activity. Short-treatment with P2Et extract, revealed a synergistic effect with doxorubicin in resistant cell lines. In vivo the P2Et increases mice survival in a TS/A breast cancer model associated with augmentation of calreticulin expression. Our results suggest that P2Et treatment could be used as adjuvant along with conventional chemotherapy to treat tumors with a MDR phenotype or with high frequency of CSC.
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Affiliation(s)
- Tito A. Sandoval
- Department of Microbiology, Grupo de Investigación Fitoquímica Universidad Javeriana (GIFUJ), Bogotá, Colombia
| | - Claudia P. Urueña
- Department of Microbiology, Grupo de Investigación Fitoquímica Universidad Javeriana (GIFUJ), Bogotá, Colombia
| | - Mónica Llano
- Department of Microbiology, Grupo de Investigación Fitoquímica Universidad Javeriana (GIFUJ), Bogotá, Colombia
| | - Alejandra Gómez-Cadena
- Department of Microbiology, Grupo de Investigación Fitoquímica Universidad Javeriana (GIFUJ), Bogotá, Colombia
| | - John F. Hernández
- Department of Microbiology, Grupo de Investigación Fitoquímica Universidad Javeriana (GIFUJ), Bogotá, Colombia
| | - Luis Gonzalo Sequeda
- Departament of Chemistry, Pontificia Universidad Javeriana, Grupo de Investigación Fitoquímica Universidad Javeriana (GIFUJ), Bogotá, Colombia
| | - Alix E. Loaiza
- Departament of Chemistry, Pontificia Universidad Javeriana, Grupo de Investigación Fitoquímica Universidad Javeriana (GIFUJ), Bogotá, Colombia
| | - Alfonso Barreto
- Department of Microbiology, Grupo de Investigación Fitoquímica Universidad Javeriana (GIFUJ), Bogotá, Colombia
| | - Shaoping Li
- Institute of Chinese Medical Sciences, University of Macau, Macau, P.R. China
| | - Susana Fiorentino
- Department of Microbiology, Grupo de Investigación Fitoquímica Universidad Javeriana (GIFUJ), Bogotá, Colombia
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15
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da Fonseca LM, da Silva VA, Freire-de-Lima L, Previato JO, Mendonça-Previato L, Capella MAM. Glycosylation in Cancer: Interplay between Multidrug Resistance and Epithelial-to-Mesenchymal Transition? Front Oncol 2016; 6:158. [PMID: 27446804 PMCID: PMC4916178 DOI: 10.3389/fonc.2016.00158] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2016] [Accepted: 06/10/2016] [Indexed: 12/18/2022] Open
Abstract
The expression of unusual glycan structures is a hallmark of cancer progression, and their functional roles in cancer biology have been extensively investigated in epithelial-to-mesenchymal transition (EMT) models. EMT is a physiological process involved in embryonic development and wound healing. It is characterized by loss of epithelial cell polarity and cell adhesion, permitting cell migration, and thus formation of new epithelia. However, this process is unwanted when occurring outside their physiological limit, resulting in fibrosis of organs and progression of cancer and metastasis. Several studies observed that EMT is related to the acquisition of multidrug resistance (MDR) phenotype, a condition in which cancer cells acquire resistance to multiple different drugs, which has virtually nothing in common. However, although some studies suggested interplay between these two apparently distinct phenomena, almost nothing is known about this possible relationship. A common pathway to them is the need for glycosylation, a post-translational modification that can alter biological function. Thus, this review intends to compile the main facts obtained until now in these two areas, as an effort to unravel the relationship between EMT and MDR.
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Affiliation(s)
- Leonardo Marques da Fonseca
- Laboratório de Glicobiologia, Instituto de Biofísica Carlos Chagas Filho, Universidade Federal do Rio de Janeiro , Rio de Janeiro, Rio de Janeiro , Brazil
| | - Vanessa Amil da Silva
- Laboratório de Glicobiologia, Instituto de Biofísica Carlos Chagas Filho, Universidade Federal do Rio de Janeiro , Rio de Janeiro, Rio de Janeiro , Brazil
| | - Leonardo Freire-de-Lima
- Laboratório de Glicobiologia, Instituto de Biofísica Carlos Chagas Filho, Universidade Federal do Rio de Janeiro , Rio de Janeiro, Rio de Janeiro , Brazil
| | - José Osvaldo Previato
- Laboratório de Glicobiologia, Instituto de Biofísica Carlos Chagas Filho, Universidade Federal do Rio de Janeiro , Rio de Janeiro, Rio de Janeiro , Brazil
| | - Lucia Mendonça-Previato
- Laboratório de Glicobiologia, Instituto de Biofísica Carlos Chagas Filho, Universidade Federal do Rio de Janeiro , Rio de Janeiro, Rio de Janeiro , Brazil
| | - Márcia Alves Marques Capella
- Laboratório de Glicobiologia, Instituto de Biofísica Carlos Chagas Filho, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Rio de Janeiro, Brazil; Laboratório de P&D em Práticas Integrativas e Complementares, Faculdade de Farmácia, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Rio de Janeiro, Brazil
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16
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He Z, Chen Q, Chen F, Zhang J, Li H, Lin JM. DNA-mediated cell surface engineering for multiplexed glycan profiling using MALDI-TOF mass spectrometry. Chem Sci 2016; 7:5448-5452. [PMID: 30034684 PMCID: PMC6021752 DOI: 10.1039/c6sc00215c] [Citation(s) in RCA: 43] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2016] [Accepted: 05/04/2016] [Indexed: 12/30/2022] Open
Abstract
Glycans are crucial for many key biological processes and their alterations are often a hallmark of disease. Thus, multiplexed and sensitive analysis of glycans is of intense interest. Here we report a novel approach using DNA-mediated cell surface engineering for glycan profiling by MALDI-TOF mass spectrometry (MS). Following lectin binding, DNA amplification and hybridization, glycans on the cell surface are specifically labeled by short DNA probes, which can be facilely released, ionized and detected in MALDI-TOF MS. This strategy converts the analysis of glycans to the detection of DNA probes, overcoming the complicated composition and low ionization efficiency of glycans, enabling in situ detection and facilitating multiplex analysis. The amplification procedure also improves the sensitivity. This approach has been applied to evaluate glycomic alterations in cancer cells and provided the intrinsic distribution of glycans in tissues using MALDI imaging mass spectrometry.
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Affiliation(s)
- Ziyi He
- Department of Chemistry , Beijing Key Laboratory of Microanalytical Methods and Instrumentation , Tsinghua University , Beijing 100084 , China .
| | - Qiushui Chen
- Department of Chemistry , Beijing Key Laboratory of Microanalytical Methods and Instrumentation , Tsinghua University , Beijing 100084 , China .
| | - Fengming Chen
- Department of Chemistry , Beijing Key Laboratory of Microanalytical Methods and Instrumentation , Tsinghua University , Beijing 100084 , China .
| | - Jie Zhang
- Department of Chemistry , Beijing Key Laboratory of Microanalytical Methods and Instrumentation , Tsinghua University , Beijing 100084 , China .
| | - Haifang Li
- Department of Chemistry , Beijing Key Laboratory of Microanalytical Methods and Instrumentation , Tsinghua University , Beijing 100084 , China .
| | - Jin-Ming Lin
- Department of Chemistry , Beijing Key Laboratory of Microanalytical Methods and Instrumentation , Tsinghua University , Beijing 100084 , China .
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17
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Atil B, Berger-Sieczkowski E, Bardy J, Werner M, Hohenegger M. In vitro and in vivo downregulation of the ATP binding cassette transporter B1 by the HMG-CoA reductase inhibitor simvastatin. Naunyn Schmiedebergs Arch Pharmacol 2015; 389:17-32. [PMID: 26319048 PMCID: PMC4700083 DOI: 10.1007/s00210-015-1169-3] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2015] [Accepted: 08/18/2015] [Indexed: 12/20/2022]
Abstract
Extrusion of chemotherapeutics by ATP-binding cassette (ABC) transporters like ABCB1 (P-glycoprotein) represents a crucial mechanism of multidrug resistance in cancer therapy. We have previously shown that the 3-hydroxy-3-methylglutaryl coenzyme A (HMG-CoA) reductase inhibitor simvastatin directly inhibits ABCB1, alters the glycosylation of the transporter, and enhances the intracellular accumulation of doxorubicin with subsequent anti-cancer action. Here, we show that simvastatin reduces endogenous dolichol levels and ABCB1 in human neuroblastoma SH-SY5Y cells. Coapplication with dolichol prevents the downregulation of the ABCB1 transporter. Importantly, dolichol also attenuated simvastatin-induced apoptosis, unmasking involvement of unfolded protein response. Direct monitoring of the fluorescent fusion protein YFP-ABCB1 further confirms concentration-dependent reduction of ABCB1 in HEK293 cells by simvastatin. In simvastatin-treated murine xenografts, ABCB1 was also reduced in the liver and rhabdomyosarcoma but did not reach significance in neuroblastoma. Nevertheless, the in vivo anti-cancer effects of simvastatin are corroborated by increased apoptosis in tumor tissues. These findings provide experimental evidence for usage of simvastatin in novel chemotherapeutic regimens and link dolichol depletion to simvastatin-induced anti-cancer activity.
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Affiliation(s)
- Bihter Atil
- Institute of Pharmacology, Center for Physiology and Pharmacology, Medical University of Vienna, Währingerstraße 13A, 1090, Vienna, Austria
| | | | - Johanna Bardy
- Institute of Pharmacology, Center for Physiology and Pharmacology, Medical University of Vienna, Währingerstraße 13A, 1090, Vienna, Austria.,Department of Internal Medicine, Hanuschkrankenhaus, Heinrich-Collin-Strasse 30, 1140, Vienna, Austria
| | - Martin Werner
- Institute of Pharmacology, Center for Physiology and Pharmacology, Medical University of Vienna, Währingerstraße 13A, 1090, Vienna, Austria.,Department of Internal Medicine, Hanuschkrankenhaus, Heinrich-Collin-Strasse 30, 1140, Vienna, Austria
| | - Martin Hohenegger
- Institute of Pharmacology, Center for Physiology and Pharmacology, Medical University of Vienna, Währingerstraße 13A, 1090, Vienna, Austria.
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18
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Joyce H, McCann A, Clynes M, Larkin A. Influence of multidrug resistance and drug transport proteins on chemotherapy drug metabolism. Expert Opin Drug Metab Toxicol 2015; 11:795-809. [PMID: 25836015 DOI: 10.1517/17425255.2015.1028356] [Citation(s) in RCA: 53] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
INTRODUCTION Chemotherapy involving the use of anticancer drugs remains an important strategy in the overall management of patients with metastatic cancer. Acquisition of multidrug resistance remains a major impediment to successful chemotherapy. Drug transporters in cell membranes and intracellular drug metabolizing enzymes contribute to the resistance phenotype and determine the pharmacokinetics of anticancer drugs in the body. AREAS COVERED ATP-binding cassette (ABC) transporters mediate the transport of endogenous metabolites and xenobiotics including cytotoxic drugs out of cells. Solute carrier (SLC) transporters mediate the influx of cytotoxic drugs into cells. This review focuses on the substrate interaction of these transporters, on their biology and what role they play together with drug metabolizing enzymes in eliminating therapeutic drugs from cells. EXPERT OPINION The majority of anticancer drugs are substrates for the ABC transporter and SLC transporter families. Together, these proteins have the ability to control the influx and the efflux of structurally unrelated chemotherapeutic drugs, thereby modulating the intracellular drug concentration. These interactions have important clinical implications for chemotherapy because ultimately they determine therapeutic efficacy, disease progression/relapse and the success or failure of patient treatment.
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Affiliation(s)
- Helena Joyce
- Dublin City University, National Institute for Cellular Biotechnology (NICB) , Glasnevin, Dublin 9 , Ireland +353 1 7005700 ; +353 1 7005484 ;
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19
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Development of Monolithic Column Materials for the Separation and Analysis of Glycans. CHROMATOGRAPHY 2015. [DOI: 10.3390/chromatography2010020] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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20
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Expression of the ABC transport proteins MDR1 (ABCB1) and BCRP (ABCG2) in bovine rumen. J Comp Physiol B 2014; 184:673-81. [DOI: 10.1007/s00360-014-0804-5] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2013] [Revised: 01/07/2014] [Accepted: 01/13/2014] [Indexed: 01/08/2023]
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21
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Javam M, Audette MC, Iqbal M, Bloise E, Gibb W, Matthews SG. Effect of oxygen on multidrug resistance in term human placenta. Placenta 2014; 35:324-30. [PMID: 24685282 DOI: 10.1016/j.placenta.2014.02.010] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/03/2013] [Revised: 02/10/2014] [Accepted: 02/23/2014] [Indexed: 11/19/2022]
Abstract
INTRODUCTION The placenta contains efflux transporters, including P-glycoprotein (P-gp) and breast cancer resistance protein (BCRP), that limit the passage of xenobiotics, certain hormones and nutrients from the maternal to the fetal circulation. The expression of these transporters changes with gestational age, yet the mechanisms involved remain unknown. However, the changes in P-gp and BCRP transporter expression coincide with those of oxygen tension in the placenta, and oxygen tension has been shown to modulate P-gp and BCRP expression in other tissues. The objective of this study was to investigate the effects of oxygen tension on P-gp and BCRP expression in the term human placenta. METHODS Following equilibration in culture (96 h), term placental explants (n = 7) were cultured in 3% or 20% oxygen for 24 and 48 h. Culture medium was collected every 24 h to measure lactate dehydrogenase (LDH; explant viability) and human chorionic gonadotropin (hCG; syncytiotrophoblast function). P-gp (encoded by ABCB1) and BCRP (encoded by ABCG2) protein and mRNA, as well as VEGFA mRNA were measured using western blot and qRT-PCR. P-gp localization was determined using immunofluorescence. RESULTS Oxygen tension had a significant effect on P-gp expression, with ABCB1/P-gp mRNA and protein levels increased in the hypoxic condition (3% O2) after 48 h (p < 0.05). VEGFA mRNA was elevated by hypoxia at both 24 and 48 h (p < 0.05). In contrast, placental ABCG2/BCRP mRNA and protein expression were stable with changes in oxygen tension. We identified profound differences in the glycosylation of P-gp between cultured and non-cultured placental tissue, with cultured explants expressing deglycosylated P-gp. CONCLUSIONS These findings demonstrate that, at term, the expression of placental P-gp, is regulated by oxygen tension. This suggests that changes in oxygenation of the placenta in the third trimester may alter levels of placental P-gp, and in doing so alter fetal exposure to P-gp substrates, including xenobiotics and certain hormones.
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Affiliation(s)
- M Javam
- Department of Physiology, University of Toronto, Toronto, Canada
| | - M C Audette
- Department of Physiology, University of Toronto, Toronto, Canada
| | - M Iqbal
- Department of Physiology, University of Toronto, Toronto, Canada
| | - E Bloise
- Department of Physiology, University of Toronto, Toronto, Canada
| | - W Gibb
- Dept Ob-Gyn, University of Ottawa, Ottawa, Canada; Dept Cellular & Molecular Medicine, University of Ottawa, Ottawa, Canada
| | - S G Matthews
- Department of Physiology, University of Toronto, Toronto, Canada; Department of Ob-Gyn, University of Toronto, Toronto, Canada; Department of Medicine, University of Toronto, Toronto, Canada; Fraser Mustard Institute for Human Development, University of Toronto, Toronto, Canada.
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22
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Yang T, Xu F, Xu J, Fang D, Yu Y, Chen Y. Comparison of liquid chromatography-tandem mass spectrometry-based targeted proteomics and conventional analytical methods for the determination of P-glycoprotein in human breast cancer cells. J Chromatogr B Analyt Technol Biomed Life Sci 2013; 936:18-24. [PMID: 23968647 DOI: 10.1016/j.jchromb.2013.07.023] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2013] [Revised: 07/05/2013] [Accepted: 07/23/2013] [Indexed: 10/26/2022]
Abstract
P-glycoprotein (P-gp) is the most frequently proposed factor for multi-drug resistance. It is traditionally measured using antibody-based methods. While these techniques can provide relative quantification values for P-gp levels, the important information that is usually missing is its amount in the biological system. In this study, a novel and advanced liquid chromatography-tandem mass spectrometry (LC/MS/MS)-based targeted proteomics assay was developed and validated for the determination of P-gp in the breast cancer drug sensitive cell line MCF-7/WT and the drug resistant cell line MCF-7/ADR. Three tryptic peptides (434STTVQLMQR442, 674GSQAQDR680 and 368IIDNKPSIDSYSK380) can specifically represent P-gp. Among these peptides, 434STTVQLMQR442 was selected as the surrogate analyte for quantification, and a stable isotope-labeled synthetic peptide with the same sequence was used as an internal standard. The calibration range was validated from 10 to 1000ng/mL. The intra- and inter-day precisions were within 5.9% and 3.7%, respectively. The accuracy for the quality control (QC) samples was within 8.0%. Using this assay, the amounts of P-gp were accurately quantified as 3.53fg/cell (∼2.08×10(-2)amol/cell) in the MCF-7/WT cells and 34.5fg/cell (∼2.02×10(-1)amol/cell) in the MCF-7/ADR cells. This outcome was then compared with those obtained by conventional analytical methods including confocal microscopy, western blotting and flow cytometry. The comparative results show that not only is the LC/MS/MS-based targeted proteomics assay able to monitor the protein levels in a more accurate manner, but the large discrepancy observed between the other methods was most likely due to the lack of specificity and the semi-quantitative nature of the conventional assays.
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Affiliation(s)
- Ting Yang
- School of Pharmacy, Nanjing Medical University, 818 Tian Yuan East Road, Nanjing 211166, China
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23
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Bubencíkova T, Cholujová D, Messingerová L, Mislovicova D, Seres M, Breier A, Sulova Z. Detection of glycomic alterations induced by overexpression of p-glycoprotein on the surfaces of L1210 cells using sialic acid binding lectins. Int J Mol Sci 2012. [PMID: 23203118 PMCID: PMC3509634 DOI: 10.3390/ijms131115177] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023] Open
Abstract
P-glycoprotein (P-gp) overexpression is the most frequently observed cause of multidrug resistance in neoplastic cells. In our experiments, P-gp was expressed in L1210 mice leukemia cells (S cells) by selection with vincristine (R cells) or transfection with the gene encoding human P-gp (T cells). Remodeling of cell surface sugars is associated with P-gp expression in L1210 cells as a secondary cellular response. In this study, we monitored the alteration of cell surface saccharides by Sambucus nigra agglutinin (SNA), wheat germ agglutinin (WGA) and Maackia amurensis agglutinin (MAA). Sialic acid is predominantly linked to the surface of S, R and T cells via α-2,6 branched sugars that tightly bind SNA. The presence of sialic acid linked to the cell surface via α-2,3 branched sugars was negligible, and the binding of MAA (recognizing this branch) was much less pronounced than SNA. WGA induced greater cell death than SNA, which was bound to the cell surface and agglutinated all three L1210 cell-variants more effectively than WGA. Thus, the ability of lectins to induce cell death did not correlate with their binding efficiency and agglutination potency. Compared to S cells, P-gp positive R and T cells contain a higher amount of N-acetyl-glucosamine on their cell surface, which is associated with improved WGA binding. Both P-gp positive variants of L1210 cells are strongly resistant to vincristine as P-gp prototypical drug. This resistance could not be altered by liberalization of terminal sialyl residues from the cell surface by sialidase.
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Affiliation(s)
- Tatiana Bubencíkova
- Institute of Molecular Physiology and Genetics, Center of Excellence of the Slovak Research and Development Agency “BIOMEMBRANES2008”, Slovak Academy of Sciences, Vlarska 5, Bratislava 83334, Slovakia; E-Mails: (T.B.); (L.M.); (M.S.)
| | - Dana Cholujová
- Cancer Research Institute, Slovak Academy of Sciences, Vlarska 7, Bratislava 83391, Slovakia; E-Mail:dana.cholujova @savba.sk
| | - Lucia Messingerová
- Institute of Molecular Physiology and Genetics, Center of Excellence of the Slovak Research and Development Agency “BIOMEMBRANES2008”, Slovak Academy of Sciences, Vlarska 5, Bratislava 83334, Slovakia; E-Mails: (T.B.); (L.M.); (M.S.)
| | - Danica Mislovicova
- Institute of Chemistry, Slovak Academy of Sciences, Dubravska cesta 9, Bratislava 84538, Slovakia; E-Mail:
| | - Mario Seres
- Institute of Molecular Physiology and Genetics, Center of Excellence of the Slovak Research and Development Agency “BIOMEMBRANES2008”, Slovak Academy of Sciences, Vlarska 5, Bratislava 83334, Slovakia; E-Mails: (T.B.); (L.M.); (M.S.)
| | - Albert Breier
- Institute of Molecular Physiology and Genetics, Center of Excellence of the Slovak Research and Development Agency “BIOMEMBRANES2008”, Slovak Academy of Sciences, Vlarska 5, Bratislava 83334, Slovakia; E-Mails: (T.B.); (L.M.); (M.S.)
- Authors to whom correspondence should be addressed: E-Mails: (A.B.); (Z.S.); Tel.: +421-903-472606 (A.B.); +421-903-246360 (Z.S.); Fax: +421-2-54773666 (A.B.); +421-2-54773666 (Z.S.)
| | - Zdena Sulova
- Institute of Molecular Physiology and Genetics, Center of Excellence of the Slovak Research and Development Agency “BIOMEMBRANES2008”, Slovak Academy of Sciences, Vlarska 5, Bratislava 83334, Slovakia; E-Mails: (T.B.); (L.M.); (M.S.)
- Authors to whom correspondence should be addressed: E-Mails: (A.B.); (Z.S.); Tel.: +421-903-472606 (A.B.); +421-903-246360 (Z.S.); Fax: +421-2-54773666 (A.B.); +421-2-54773666 (Z.S.)
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Šereš M, Cholujová D, Bubenčíkova T, Breier A, Sulová Z. Tunicamycin depresses P-glycoprotein glycosylation without an effect on its membrane localization and drug efflux activity in L1210 cells. Int J Mol Sci 2011; 12:7772-84. [PMID: 22174631 PMCID: PMC3233437 DOI: 10.3390/ijms12117772] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2011] [Revised: 10/20/2011] [Accepted: 11/03/2011] [Indexed: 01/13/2023] Open
Abstract
P-glycoprotein (P-gp), also known as ABCB1, is a member of the ABC transporter family of proteins. P-gp is an ATP-dependent drug efflux pump that is localized to the plasma membrane of mammalian cells and confers multidrug resistance in neoplastic cells. P-gp is a 140-kDa polypeptide that is glycosylated to a final molecular weight of 170 kDa. Our experimental model used two variants of L1210 cells in which overexpression of P-gp was achieved: either by adaptation of parental cells (S) to vincristine (R) or by transfection with the human gene encoding P-gp (T). R and T cells were found to differ from S cells in transglycosylation reactions in our recent studies. The effects of tunicamycin on glycosylation, drug efflux activity and cellular localization of P-gp in R and T cells were examined in the present study. Treatment with tunicamycin caused less concentration-dependent cellular damage to R and T cells compared with S cells. Tunicamycin inhibited P-gp N-glycosylation in both of the P-gp-positive cells. However, tunicamycin treatment did not alter either the P-gp cellular localization to the plasma membrane or the P-gp transport activity. The present paper brings evidence that independently on the mode of P-gp expression (selection with drugs or transfection with a gene encoding P-gp) in L1210 cells, tunicamycin induces inhibition of N-glycosylation of this protein, without altering its function as plasma membrane drug efflux pump.
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Affiliation(s)
- Mário Šereš
- Institute of Molecular Physiology and Genetics, Centre of Excellence of the Slovak Research and Development Agency “BIOMEMBRANES2008”, Slovak Academy of Sciences, Vlárska 5, Bratislava 83334, Slovakia; E-Mails: (M.Š.); (T.B.)
| | - Dana Cholujová
- Cancer Research Institute, Slovak Academy of Sciences, Vlárska 7, Bratislava 83391, Slovakia; E-Mail:
| | - Tatiana Bubenčíkova
- Institute of Molecular Physiology and Genetics, Centre of Excellence of the Slovak Research and Development Agency “BIOMEMBRANES2008”, Slovak Academy of Sciences, Vlárska 5, Bratislava 83334, Slovakia; E-Mails: (M.Š.); (T.B.)
| | - Albert Breier
- Institute of Molecular Physiology and Genetics, Centre of Excellence of the Slovak Research and Development Agency “BIOMEMBRANES2008”, Slovak Academy of Sciences, Vlárska 5, Bratislava 83334, Slovakia; E-Mails: (M.Š.); (T.B.)
- Authors to whom correspondence should be addressed; E-Mails: (A.B.); (Z.S.); Tel.: +421-903-472-606 (A.B.); +421-903-246-360 (Z.S.); Fax: +421-2-5477-3666 (A.B.); +421-2-5477-3666 (Z.S.)
| | - Zdenka Sulová
- Institute of Molecular Physiology and Genetics, Centre of Excellence of the Slovak Research and Development Agency “BIOMEMBRANES2008”, Slovak Academy of Sciences, Vlárska 5, Bratislava 83334, Slovakia; E-Mails: (M.Š.); (T.B.)
- Authors to whom correspondence should be addressed; E-Mails: (A.B.); (Z.S.); Tel.: +421-903-472-606 (A.B.); +421-903-246-360 (Z.S.); Fax: +421-2-5477-3666 (A.B.); +421-2-5477-3666 (Z.S.)
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26
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Sulová Z, Mislovičová D, Gibalová L, Vajčnerová Z, Poláková E, Uhrík B, Tylková L, Kovárová A, Sedlák J, Breier A. Vincristine-Induced Overexpression of P-Glycoprotein in L1210 Cells Is Associated with Remodeling of Cell Surface Saccharides. J Proteome Res 2008; 8:513-20. [DOI: 10.1021/pr8007094] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Zdenka Sulová
- Institute of Molecular Physiology and Genetics, Centre of Excellence of the Slovak Research and Development Agency, BIOMEMBRANES2008, Slovak Academy of Sciences, Vlárska 5 83334, Bratislava, Slovakia, Institute of Chemistry, Center for Glycomics, Slovak Academy of Sciences, Dúbravská cesta 9, 84538, Bratislava, Slovakia, and Cancer Research Institute, Slovak Academy of Sciences, Vlárska 7, 833 91, Bratislava, Slovakia
| | - Danica Mislovičová
- Institute of Molecular Physiology and Genetics, Centre of Excellence of the Slovak Research and Development Agency, BIOMEMBRANES2008, Slovak Academy of Sciences, Vlárska 5 83334, Bratislava, Slovakia, Institute of Chemistry, Center for Glycomics, Slovak Academy of Sciences, Dúbravská cesta 9, 84538, Bratislava, Slovakia, and Cancer Research Institute, Slovak Academy of Sciences, Vlárska 7, 833 91, Bratislava, Slovakia
| | - Lenka Gibalová
- Institute of Molecular Physiology and Genetics, Centre of Excellence of the Slovak Research and Development Agency, BIOMEMBRANES2008, Slovak Academy of Sciences, Vlárska 5 83334, Bratislava, Slovakia, Institute of Chemistry, Center for Glycomics, Slovak Academy of Sciences, Dúbravská cesta 9, 84538, Bratislava, Slovakia, and Cancer Research Institute, Slovak Academy of Sciences, Vlárska 7, 833 91, Bratislava, Slovakia
| | - Zuzana Vajčnerová
- Institute of Molecular Physiology and Genetics, Centre of Excellence of the Slovak Research and Development Agency, BIOMEMBRANES2008, Slovak Academy of Sciences, Vlárska 5 83334, Bratislava, Slovakia, Institute of Chemistry, Center for Glycomics, Slovak Academy of Sciences, Dúbravská cesta 9, 84538, Bratislava, Slovakia, and Cancer Research Institute, Slovak Academy of Sciences, Vlárska 7, 833 91, Bratislava, Slovakia
| | - Eva Poláková
- Institute of Molecular Physiology and Genetics, Centre of Excellence of the Slovak Research and Development Agency, BIOMEMBRANES2008, Slovak Academy of Sciences, Vlárska 5 83334, Bratislava, Slovakia, Institute of Chemistry, Center for Glycomics, Slovak Academy of Sciences, Dúbravská cesta 9, 84538, Bratislava, Slovakia, and Cancer Research Institute, Slovak Academy of Sciences, Vlárska 7, 833 91, Bratislava, Slovakia
| | - Branislav Uhrík
- Institute of Molecular Physiology and Genetics, Centre of Excellence of the Slovak Research and Development Agency, BIOMEMBRANES2008, Slovak Academy of Sciences, Vlárska 5 83334, Bratislava, Slovakia, Institute of Chemistry, Center for Glycomics, Slovak Academy of Sciences, Dúbravská cesta 9, 84538, Bratislava, Slovakia, and Cancer Research Institute, Slovak Academy of Sciences, Vlárska 7, 833 91, Bratislava, Slovakia
| | - Lucia Tylková
- Institute of Molecular Physiology and Genetics, Centre of Excellence of the Slovak Research and Development Agency, BIOMEMBRANES2008, Slovak Academy of Sciences, Vlárska 5 83334, Bratislava, Slovakia, Institute of Chemistry, Center for Glycomics, Slovak Academy of Sciences, Dúbravská cesta 9, 84538, Bratislava, Slovakia, and Cancer Research Institute, Slovak Academy of Sciences, Vlárska 7, 833 91, Bratislava, Slovakia
| | - Annamária Kovárová
- Institute of Molecular Physiology and Genetics, Centre of Excellence of the Slovak Research and Development Agency, BIOMEMBRANES2008, Slovak Academy of Sciences, Vlárska 5 83334, Bratislava, Slovakia, Institute of Chemistry, Center for Glycomics, Slovak Academy of Sciences, Dúbravská cesta 9, 84538, Bratislava, Slovakia, and Cancer Research Institute, Slovak Academy of Sciences, Vlárska 7, 833 91, Bratislava, Slovakia
| | - Ján Sedlák
- Institute of Molecular Physiology and Genetics, Centre of Excellence of the Slovak Research and Development Agency, BIOMEMBRANES2008, Slovak Academy of Sciences, Vlárska 5 83334, Bratislava, Slovakia, Institute of Chemistry, Center for Glycomics, Slovak Academy of Sciences, Dúbravská cesta 9, 84538, Bratislava, Slovakia, and Cancer Research Institute, Slovak Academy of Sciences, Vlárska 7, 833 91, Bratislava, Slovakia
| | - Albert Breier
- Institute of Molecular Physiology and Genetics, Centre of Excellence of the Slovak Research and Development Agency, BIOMEMBRANES2008, Slovak Academy of Sciences, Vlárska 5 83334, Bratislava, Slovakia, Institute of Chemistry, Center for Glycomics, Slovak Academy of Sciences, Dúbravská cesta 9, 84538, Bratislava, Slovakia, and Cancer Research Institute, Slovak Academy of Sciences, Vlárska 7, 833 91, Bratislava, Slovakia
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27
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Schmid A, Sauvage V, Escotte-Binet S, Aubert D, Terryn C, Garnotel R, Villena I. Molecular characterization and expression analysis of a P-glycoprotein homologue in Toxoplasma gondii. Mol Biochem Parasitol 2008; 163:54-60. [PMID: 18984013 DOI: 10.1016/j.molbiopara.2008.09.010] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2008] [Revised: 09/11/2008] [Accepted: 09/24/2008] [Indexed: 10/21/2022]
Abstract
ATP-binding cassette (ABC) transporters represent an important family of membrane proteins involved in drug resistance and other biological activities. The present study reports on the characterization of a P-glycoprotein (Pgp), TgABC.B1, in the protozoan parasite Toxoplasma gondii. The protein encoded by the TgABC.B1 gene displays the typical (TMD-NBD)2 structural organization of the "full" ABC transporter and shows significant identity and similarity with two apicomplexan Pgps; Pgh1 in Plasmodium falciparum and CpABC3 in Cryptosporidium parvum. The TgABC.B1 gene is a single copy gene transcribed into a full-length mRNA of 4.3kb and expressed as a protein of approximately 150kDa, which cellular localization revealed a membrane-associated labelling in tachyzoites. The TgABC.B1 gene is constitutively expressed in the three major T. gondii genotypes but demonstrated a higher expression in virulent type I, at both transcriptional and translational levels. Further characterization of this Pgp-like protein will increase our knowledge of the membrane transport system in this parasite and could result in the identification of a new therapeutic target in Toxoplasma.
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Affiliation(s)
- Aline Schmid
- Laboratoire de Parasitologie-Mycologie, EA 3800, IFR 53, UFR Médecine, Université de Reims Champagne-Ardenne, 51 rue Cognacq-Jay, 51095 Reims cedex, France
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