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Zhao L, Wang Y, Zhang Y, Chen H, Sun F. Dynamic Simulations of Interaction of the PEG-DPPE Micelle-Encapsulated Short-Chain Ceramides with the Raft-Included Membrane. J Chem Inf Model 2024; 64:3874-3883. [PMID: 38652138 DOI: 10.1021/acs.jcim.4c00170] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/25/2024]
Abstract
The lipid raft subdomains in cancer cell membranes play a key role in signal transduction, biomolecule recruitment, and drug transmembrane transport. Augmented membrane rigidity due to the formation of a lipid raft is unfavorable for the entry of drugs, a limiting factor in clinical oncology. The short-chain ceramide (CER) has been reported to promote drug entry into membranes and disrupt lipid raft formation, but the underlying mechanism is not well understood. We recently explored the carrier-membrane fusion dynamics of PEG-DPPE micelles in delivering doxorubicin (DOX). Based on the phase-segregated membrane model composed of DPPC/DIPC/CHOL/GM1/PIP2, we aim to explore the dynamic mechanism of the PEG-DPPE micelle-encapsulating DOXs in association with the raft-included cell membrane modulated by C8 acyl tail CERs. The results show that the lipid raft remains integrated and DOX-resistant subjected to free DOXs and the micelle-encapsulating ones. Addition of CERs disorganizes the lipid raft by pushing CHOL aside from DPPC. It subsequently allows for a good permeability for PEG-DPPE micelle-encapsulated DOXs, which penetrate deeper as CER concentration increases. GM1 is significant in guiding drugs' redistributing between bilayer phases, and the anionic PIP2 further helps DOXs attain the inner bilayer surface. These results elaborate on the perturbing effect of CERs on lipid raft stability, which provides a new comprehensive approach for further design of drug delivery systems.
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Affiliation(s)
- Lina Zhao
- Key Laboratory of Molecular Biophysics, Hebei Province, Institute of Biophysics, School of Health Science & Biomedical Engineering, Hebei University of Technology, Tianjin 300401, China
| | - Yanjiao Wang
- Key Laboratory of Molecular Biophysics, Hebei Province, Institute of Biophysics, School of Health Science & Biomedical Engineering, Hebei University of Technology, Tianjin 300401, China
| | - Yi Zhang
- Key Laboratory of Molecular Biophysics, Hebei Province, Institute of Biophysics, School of Health Science & Biomedical Engineering, Hebei University of Technology, Tianjin 300401, China
| | - Hao Chen
- Key Laboratory of Molecular Biophysics, Hebei Province, Institute of Biophysics, School of Health Science & Biomedical Engineering, Hebei University of Technology, Tianjin 300401, China
| | - Fude Sun
- Key Laboratory of Molecular Biophysics, Hebei Province, Institute of Biophysics, School of Health Science & Biomedical Engineering, Hebei University of Technology, Tianjin 300401, China
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Longhi E, Carminati L, Carlessi E, Belotti D, Taraboletti G. Thrombospondin-1 in drug activity and tumor response to therapies. Semin Cell Dev Biol 2024; 155:45-51. [PMID: 37414720 DOI: 10.1016/j.semcdb.2023.06.009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2023] [Accepted: 06/26/2023] [Indexed: 07/08/2023]
Abstract
Thrombospondins (TSPs) have numerous different roles in cancer, regulating the behavior of cancer cells and non-neoplastic cells, and defining the responses of tumor cells to environmental changes, thorough their ability to orchestrate cellular and molecular interactions in the tumor microenvironment (TME). As a result of these activities, TSPs can also control drug delivery and activity, tumor response and resistance to therapies, with different outcomes depending on the nature of TSP-interacting cell types, receptors, and ligands, in a highly context-dependent manner. This review, focusing primarily on TSP-1, discusses the effects of TSPs on tumor response to chemotherapy, antiangiogenic, low-dose metronomic chemotherapy, immunotherapy, and radiotherapy, by analyzing TSP activity on different cell compartments - tumor cells, vascular endothelial cells and immune cells. We review evidence of the value of TSPs, specifically TSP-1 and TSP-2, as biomarkers of prognosis and tumor response to therapy. Finally, we examine possible approaches to develop TSP-based compounds as therapeutic tools to potentiate the efficacy of anticancer therapy.
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Affiliation(s)
- Elisa Longhi
- Laboratory of Tumor Microenvironment, Department of Oncology, Istituto di Ricerche Farmacologiche Mario Negri IRCCS, Via Stezzano 87, Bergamo 24126, Italy
| | - Laura Carminati
- Laboratory of Tumor Microenvironment, Department of Oncology, Istituto di Ricerche Farmacologiche Mario Negri IRCCS, Via Stezzano 87, Bergamo 24126, Italy
| | - Elena Carlessi
- Laboratory of Tumor Microenvironment, Department of Oncology, Istituto di Ricerche Farmacologiche Mario Negri IRCCS, Via Stezzano 87, Bergamo 24126, Italy
| | - Dorina Belotti
- Laboratory of Tumor Microenvironment, Department of Oncology, Istituto di Ricerche Farmacologiche Mario Negri IRCCS, Via Stezzano 87, Bergamo 24126, Italy.
| | - Giulia Taraboletti
- Laboratory of Tumor Microenvironment, Department of Oncology, Istituto di Ricerche Farmacologiche Mario Negri IRCCS, Via Stezzano 87, Bergamo 24126, Italy.
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3
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Wang J, Han S, Ye J. Topological regulation of a transmembrane protein by luminal-to-cytosolic retrotranslocation of glycosylated sequence. Cell Rep 2023; 42:112311. [PMID: 36972171 PMCID: PMC10520219 DOI: 10.1016/j.celrep.2023.112311] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2022] [Revised: 02/02/2023] [Accepted: 03/11/2023] [Indexed: 03/28/2023] Open
Abstract
Transmembrane proteins must adopt proper topology to perform their functions. We previously demonstrated that ceramide regulates TM4SF20 (transmembrane 4 L6 family 20) by altering the topology of the transmembrane protein, but the underlying mechanism remains obscure. Here we report that TM4SF20 is synthesized in the endoplasmic reticulum (ER) with a cytosolic C terminus and a luminal loop before the last transmembrane helix where N132, N148, and N163 are glycosylated. In the absence of ceramide, the sequence surrounding glycosylated N163 but not N132 is retrotranslocated from lumen to cytosol independent of ER-associated degradation. Accompanying this retrotranslocation, the C terminus of the protein is relocated from cytosol to lumen. Ceramide delays the retrotranslocation process, causing accumulation of the protein that is originally synthesized. Our findings suggest that N-linked glycans, although synthesized in the lumens, may be exposed to cytosol through retrotranslocation, a reaction that may play a crucial role in topological regulation of transmembrane proteins.
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Affiliation(s)
- Jingcheng Wang
- Department of Molecular Genetics, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA
| | - Sungwon Han
- Department of Molecular Genetics, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA
| | - Jin Ye
- Department of Molecular Genetics, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA.
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Yap KM, Sekar M, Wu YS, Gan SH, Rani NNIM, Seow LJ, Subramaniyan V, Fuloria NK, Fuloria S, Lum PT. Hesperidin and its aglycone hesperetin in breast cancer therapy: A review of recent developments and future prospects. Saudi J Biol Sci 2021; 28:6730-6747. [PMID: 34866972 PMCID: PMC8626310 DOI: 10.1016/j.sjbs.2021.07.046] [Citation(s) in RCA: 31] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2021] [Revised: 07/11/2021] [Accepted: 07/14/2021] [Indexed: 01/05/2023] Open
Abstract
Breast cancer (BC) has high incidence and mortality rates, making it a major global health issue. BC treatment has been challenging due to the presence of drug resistance and the limited availability of therapeutic options for triple-negative and metastatic BC, thereby urging the exploration of more effective anti-cancer agents. Hesperidin and its aglycone hesperetin, two flavonoids from citrus species, have been extensively evaluated for their anti-cancer potentials. In this review, available literatures on the chemotherapeutic and chemosensitising activities of hesperidin and hesperetin in preclinical BC models are reported. The safety and bioavailability of hesperidin and hesperetin as well as the strategies to enhance their bioavailability are also discussed. Overall, hesperidin and hesperetin can inhibit cell proliferation, migration and BC stem cells as well as induce apoptosis and cell cycle arrest in vitro. They can also inhibit tumour growth, metastasis and neoplastic changes in tissue architecture in vivo. Moreover, the co-administration of hesperidin or hesperetin with doxorubicin, letrozole or tamoxifen can enhance the efficacies of these clinically available agents. These chemotherapeutic and chemosensitising activities of hesperidin and hesperetin have been linked to several mechanisms, including the modulation of signalling pathways, glucose uptake, enzymes, miRNA expression, oxidative status, cell cycle regulatory proteins, tumour suppressor p53, plasma and liver lipid profiles as well as DNA repair mechanisms. However, poor water solubility, extensive phase II metabolism and apical efflux have posed limitations to the bioavailability of hesperidin and hesperetin. Various strategies for bioavailability enhancement have been studied, including the utilisation of nano-based drug delivery systems and the co-administration of hesperetin with other flavonoids. In particular, nanoformulated hesperidin and hesperetin possess greater chemotherapeutic and chemosensitising activities than free compounds. Despite promising preclinical results, further safety and efficacy evaluation of hesperidin and hesperetin as well as their nanoformulations in clinical trials is required to ascertain their potentials to be developed as clinically useful agents for BC treatment.
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Affiliation(s)
- Kah Min Yap
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy and Health Sciences, Universiti Kuala Lumpur Royal College of Medicine Perak, Ipoh - 30450, Perak, Malaysia
| | - Mahendran Sekar
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy and Health Sciences, Universiti Kuala Lumpur Royal College of Medicine Perak, Ipoh - 30450, Perak, Malaysia
| | - Yuan Seng Wu
- Faculty of Medicine, Bioscience and Nursing, MAHSA University, Selangor - 42610, Malaysia
| | - Siew Hua Gan
- School of Pharmacy, Monash University Malaysia, Bandar Sunway - 47500, Selangor Darul Ehsan, Malaysia
| | - Nur Najihah Izzati Mat Rani
- Faculty of Pharmacy and Health Sciences, Universiti Kuala Lumpur Royal College of Medicine Perak, Ipoh - 30450, Perak, Malaysia
| | - Lay Jing Seow
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy and Health Sciences, Universiti Kuala Lumpur Royal College of Medicine Perak, Ipoh - 30450, Perak, Malaysia
| | | | | | | | - Pei Teng Lum
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy and Health Sciences, Universiti Kuala Lumpur Royal College of Medicine Perak, Ipoh - 30450, Perak, Malaysia
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Nduwumwami AJ, Hengst JA, Yun JK. Sphingosine Kinase Inhibition Enhances Dimerization of Calreticulin at the Cell Surface in Mitoxantrone-Induced Immunogenic Cell Death. J Pharmacol Exp Ther 2021; 378:300-310. [PMID: 34158403 DOI: 10.1124/jpet.121.000629] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2021] [Accepted: 06/16/2021] [Indexed: 11/22/2022] Open
Abstract
Agents that induce immunogenic cell death (ICD) alter the cellular localization of calreticulin (CRT), causing it to become cell surface-exposed within the plasma membrane lipid raft microdomain [cell surface-exposed CRT (ectoCRT)] where it serves as a damage associated-molecular pattern that elicits an antitumor immune response. We have identified the sphingolipid metabolic pathway as an integral component of the process of ectoCRT exposure. Inhibition of the sphingosine kinases (SphKs) enhances mitoxantrone-induced production of hallmarks of ICD, including ectoCRT production, with an absolute mean difference of 40 MFI (95% CI: 19-62; P = 0.0014) and 1.3-fold increase of ATP secretion with an absolute mean difference of 87 RLU (95% CI: 55-120; P < 0.0001). Mechanistically, sphingosine kinase inhibition increases mitoxantrone-induced accumulation of ceramide species, including C16:0 ceramide 2.8-fold with an absolute mean difference of 1.390 pmol/nmol Pi (95% CI: 0.798-1.983; P = 0.0023). We further examined the localization of ectoCRT to the lipid raft microdomain and demonstrate that ectoCRT forms disulfide-bridged dimers. Together, our findings suggest that ceramide accumulation impinges on the homeostatic function of the endoplasmic reticulum to induce ectoCRT exposure and that structural alterations of ectoCRT may underlie its immunogenicity. Our findings further suggest that inhibition of the SphKs may represent a means to enhance the therapeutic immunogenic efficacy of ICD-inducing agents while reducing overt toxicity/immunosuppressive effects by allowing for the modification of dosing regimens or directly lowering the dosages of ICD-inducing agents employed in therapeutic regimens. SIGNIFICANCE STATEMENT: This study demonstrates that inhibition of sphingosine kinase enhances the mitoxantrone-induced cell surface exposure of a dimeric form of the normally endoplasmic reticulum resident chaperone calreticulin as part of the process of a unique form of regulated cell death termed immunogenic cell death. Importantly, inhibition of sphingosine kinase may represent a means to enhance the therapeutic efficacy of immunogenic cell death-inducing agents, such as mitoxantrone, while reducing their overt toxicity and immunosuppressive effects, leading to better therapeutic outcomes for patients.
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Affiliation(s)
- Asvelt J Nduwumwami
- Department of Pharmacology, Pennsylvania State University College of Medicine, Hershey, Pennsylvania
| | - Jeremy A Hengst
- Department of Pharmacology, Pennsylvania State University College of Medicine, Hershey, Pennsylvania
| | - Jong K Yun
- Department of Pharmacology, Pennsylvania State University College of Medicine, Hershey, Pennsylvania
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6
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Majtnerova P, Capek J, Petira F, Handl J, Rousar T. Quantitative spectrofluorometric assay detecting nuclear condensation and fragmentation in intact cells. Sci Rep 2021; 11:11921. [PMID: 34099803 PMCID: PMC8184882 DOI: 10.1038/s41598-021-91380-3] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2021] [Accepted: 05/21/2021] [Indexed: 12/17/2022] Open
Abstract
At present, nuclear condensation and fragmentation have been estimated also using Hoechst probes in fluorescence microscopy and flow cytometry. However, none of the methods used the Hoechst probes for quantitative spectrofluorometric assessment. Therefore, the aim of the present study was to develop a spectrofluorometric assay for detection of nuclear condensation and fragmentation in the intact cells. We used human hepatoma HepG2 and renal HK-2 cells cultured in 96-well plates treated with potent apoptotic inducers (i.e. cisplatin, staurosporine, camptothecin) for 6-48 h. Afterwards, the cells were incubated with Hoechst 33258 (2 µg/mL) and the increase of fluorescence after binding of the dye to DNA was measured. The developed spectrofluorometric assay was capable to detect nuclear changes caused by all tested apoptotic inducers. Then, we compared the outcomes of the spectrofluorometric assay with other methods detecting cell impairment and apoptosis (i.e. WST-1 and glutathione tests, TUNEL, DNA ladder, caspase activity, PARP-1 and JNKs expressions). We found that our developed spectrofluorometric assay provided results of the same sensitivity as the TUNEL assay but with the advantages of being fast processing, low-cost and a high throughput. Because nuclear condensation and fragmentation can be typical markers of cell death, especially in apoptosis, we suppose that the spectrofluorometric assay could become a routinely used method for characterizing cell death processes.
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Affiliation(s)
- Pavlina Majtnerova
- Department of Biological and Biochemical Sciences, Faculty of Chemical Technology, University of Pardubice, Studentska 573, 532 10, Pardubice, Czech Republic
| | - Jan Capek
- Department of Biological and Biochemical Sciences, Faculty of Chemical Technology, University of Pardubice, Studentska 573, 532 10, Pardubice, Czech Republic
| | - Filip Petira
- Department of Biological and Biochemical Sciences, Faculty of Chemical Technology, University of Pardubice, Studentska 573, 532 10, Pardubice, Czech Republic
| | - Jiri Handl
- Department of Biological and Biochemical Sciences, Faculty of Chemical Technology, University of Pardubice, Studentska 573, 532 10, Pardubice, Czech Republic
| | - Tomas Rousar
- Department of Biological and Biochemical Sciences, Faculty of Chemical Technology, University of Pardubice, Studentska 573, 532 10, Pardubice, Czech Republic.
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7
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Courageot MP, Duca L, Martiny L, Devarenne-Charpentier E, Morjani H, El Btaouri H. Thrombospondin-1 Receptor CD47 Overexpression Contributes to P-Glycoprotein-Mediated Multidrug Resistance Against Doxorubicin in Thyroid Carcinoma FTC-133 Cells. Front Oncol 2020; 10:551228. [PMID: 33365267 PMCID: PMC7750475 DOI: 10.3389/fonc.2020.551228] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2020] [Accepted: 11/02/2020] [Indexed: 01/16/2023] Open
Abstract
It is now admitted that in addition to acquired resistance, the tumor microenvironment contributes to the development of chemo-resistance and malignant progression. In a previous study, we showed that Dox induced apoptosis in FTC-133 cells by trigging JNK pathway. This process was accompanied by a decrease of thrombospondin-1 (TSP-1) expression. Moreover, exogenous TSP-1 or its C-terminal-derived peptide interact with receptor CD47 and are able to protect FTC-133 cells against Dox-induced apoptosis. Here, we investigated the involvement of TSP-1/CD47 interaction in a context of acquired multidrug resistance in FTC-133 cells. To that end, we established a Dox-resistant cell line (FTC-133R cells) which developed a resistance against Dox-induced apoptosis. Cell viability was evaluated by Uptiblue assay, nuclear Dox was measured by microspectrofluorimetry, caspase activity was measured by fluorescence of cleaved caspase-3 substrate, gene expression was evaluated by RT-PCR and protein expression was examined by western-blot. Our results showed that FTC-133R overexpressed the P-gp and were 15-fold resistant to Dox. JNK phosphorylation and Dox-induced apoptosis were reduced in FTC-133R cells. Expression of CD47 was increased in FTC-133R cells but TSP-1 expression presented similar levels in two cell lines. VPL restored Dox nuclear uptake and FTC-133R cell sensitivity to apoptosis and induced a decrease in CD47 mRNA expression. Moreover, knockdown of CD47 in FTC-133R cells induced an increase in JNK activation and sensitized FTC-133R cells to Dox. Our data suggest that CD47 is able to contribute to the protection of FTC-133R cells against Dox-induced apoptosis and/or to potentiate the acquired Dox resistance.
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Affiliation(s)
- Marie-Pierre Courageot
- Laboratoire de Biospectroscopie Translationnelle (BioSpecT), UFR Pharmacie, Université de Reims Champagne Ardenne, Reims, France
| | - Laurent Duca
- UMR-CNRS 7369 Matrice Extracellulaire et Dynamique Cellulaire (MEDyC), UFR Sciences Exactes et Naturelles, Université de Reims Champagne Ardenne, Moulin de la Housse, Reims, France
| | - Laurent Martiny
- UMR-CNRS 7369 Matrice Extracellulaire et Dynamique Cellulaire (MEDyC), UFR Sciences Exactes et Naturelles, Université de Reims Champagne Ardenne, Moulin de la Housse, Reims, France
| | - Emmanuelle Devarenne-Charpentier
- UMR-CNRS 7369 Matrice Extracellulaire et Dynamique Cellulaire (MEDyC), UFR Sciences Exactes et Naturelles, Université de Reims Champagne Ardenne, Moulin de la Housse, Reims, France
| | - Hamid Morjani
- Laboratoire de Biospectroscopie Translationnelle (BioSpecT), UFR Pharmacie, Université de Reims Champagne Ardenne, Reims, France
| | - Hassan El Btaouri
- UMR-CNRS 7369 Matrice Extracellulaire et Dynamique Cellulaire (MEDyC), UFR Sciences Exactes et Naturelles, Université de Reims Champagne Ardenne, Moulin de la Housse, Reims, France
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8
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Zhao Y, Fletcher NL, Gemmell A, Houston ZH, Howard CB, Blakey I, Liu T, Thurecht KJ. Investigation of the Therapeutic Potential of a Synergistic Delivery System through Dual Controlled Release of Camptothecin–Doxorubicin. ADVANCED THERAPEUTICS 2020. [DOI: 10.1002/adtp.201900202] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Yongmei Zhao
- Centre for Advanced Imaging, Australian Institute for Bioengineering and Nanotechnology, ARC Centre of Excellence in Convergent Bio‐Nano Science and Technology and ARC Training Centre in Biomedical Imaging TechnologyThe University of Queensland Brisbane QLD 4072 Australia
- School of PharmacyNantong University Nantong 226019 China
| | - Nicholas L. Fletcher
- Centre for Advanced Imaging, Australian Institute for Bioengineering and Nanotechnology, ARC Centre of Excellence in Convergent Bio‐Nano Science and Technology and ARC Training Centre in Biomedical Imaging TechnologyThe University of Queensland Brisbane QLD 4072 Australia
| | - Anna Gemmell
- Centre for Advanced Imaging, Australian Institute for Bioengineering and Nanotechnology, ARC Centre of Excellence in Convergent Bio‐Nano Science and Technology and ARC Training Centre in Biomedical Imaging TechnologyThe University of Queensland Brisbane QLD 4072 Australia
| | - Zachary H. Houston
- Centre for Advanced Imaging, Australian Institute for Bioengineering and Nanotechnology, ARC Centre of Excellence in Convergent Bio‐Nano Science and Technology and ARC Training Centre in Biomedical Imaging TechnologyThe University of Queensland Brisbane QLD 4072 Australia
| | - Christopher B. Howard
- Centre for Advanced Imaging, Australian Institute for Bioengineering and Nanotechnology, ARC Centre of Excellence in Convergent Bio‐Nano Science and Technology and ARC Training Centre in Biomedical Imaging TechnologyThe University of Queensland Brisbane QLD 4072 Australia
| | - Idriss Blakey
- Centre for Advanced Imaging, Australian Institute for Bioengineering and Nanotechnology, ARC Centre of Excellence in Convergent Bio‐Nano Science and Technology and ARC Training Centre in Biomedical Imaging TechnologyThe University of Queensland Brisbane QLD 4072 Australia
| | - Tianqing Liu
- QIMR Berghofer Medical Research Institute 300 Herston Road Brisbane QLD 4006 Australia
| | - Kristofer J. Thurecht
- Centre for Advanced Imaging, Australian Institute for Bioengineering and Nanotechnology, ARC Centre of Excellence in Convergent Bio‐Nano Science and Technology and ARC Training Centre in Biomedical Imaging TechnologyThe University of Queensland Brisbane QLD 4072 Australia
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9
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Cucho H, López Y, Caldeira C, Valverde A, Ordóñez C, Soler C. Comparison of three different staining methods for the morphometric characterization of Alpaca (Vicugna pacos) sperm, using ISAS® CASA-Morph system. NOVA BIOLOGICA REPERTA 2019. [DOI: 10.29252/nbr.6.3.284] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
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10
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Snider JM, Trayssac M, Clarke CJ, Schwartz N, Snider AJ, Obeid LM, Luberto C, Hannun YA. Multiple actions of doxorubicin on the sphingolipid network revealed by flux analysis. J Lipid Res 2019; 60:819-831. [PMID: 30573560 PMCID: PMC6446699 DOI: 10.1194/jlr.m089714] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2018] [Revised: 12/18/2018] [Indexed: 12/16/2022] Open
Abstract
Sphingolipids (SLs) have been implicated in numerous important cellular biologies; however, their study has been hindered by the complexities of SL metabolism. Furthermore, enzymes of SL metabolism represent a dynamic and interconnected network in which one metabolite can be transformed into other bioactive SLs through further metabolism, resulting in diverse cellular responses. Here we explore the effects of both lethal and sublethal doses of doxorubicin (Dox) in MCF-7 cells. The two concentrations of Dox resulted in the regulation of SLs, including accumulations in sphingosine, sphingosine-1-phosphate, dihydroceramide, and ceramide, as well as reduced levels of hexosylceramide. To further define the effects of Dox on SLs, metabolic flux experiments utilizing a d17 dihydrosphingosine probe were conducted. Results indicated the regulation of ceramidases and sphingomyelin synthase components specifically in response to the cytostatic dose. The results also unexpectedly demonstrated dose-dependent inhibition of dihydroceramide desaturase and glucosylceramide synthase in response to Dox. Taken together, this study uncovers novel targets in the SL network for the action of Dox, and the results reveal the significant complexity of SL response to even a single agent. This approach helps to define the role of specific SL enzymes, their metabolic products, and the resulting biologies in response to chemotherapeutics and other stimuli.
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Affiliation(s)
- Justin M Snider
- Molecular and Cellular Biology and Biochemistry and Structural Biology Graduate Program, Stony Brook University, Stony Brook, NY; Departments of Medicine, Stony Brook University, Stony Brook, NY; Stony Brook Cancer Center, Stony Brook University, Stony Brook, NY
| | - Magali Trayssac
- Departments of Medicine, Stony Brook University, Stony Brook, NY; Stony Brook Cancer Center, Stony Brook University, Stony Brook, NY
| | - Christopher J Clarke
- Departments of Medicine, Stony Brook University, Stony Brook, NY; Stony Brook Cancer Center, Stony Brook University, Stony Brook, NY
| | - Nicholas Schwartz
- Departments of Medicine, Stony Brook University, Stony Brook, NY; Stony Brook Cancer Center, Stony Brook University, Stony Brook, NY
| | - Ashley J Snider
- Departments of Medicine, Stony Brook University, Stony Brook, NY; Stony Brook Cancer Center, Stony Brook University, Stony Brook, NY; Northport Veterans Affairs Medical Center, Northport, NY
| | - Lina M Obeid
- Departments of Medicine, Stony Brook University, Stony Brook, NY; Stony Brook Cancer Center, Stony Brook University, Stony Brook, NY; Northport Veterans Affairs Medical Center, Northport, NY
| | - Chiara Luberto
- Stony Brook Cancer Center, Stony Brook University, Stony Brook, NY; Departments of Physiology and Biophysics, Stony Brook University, Stony Brook, NY.
| | - Yusuf A Hannun
- Departments of Medicine, Stony Brook University, Stony Brook, NY; Stony Brook Cancer Center, Stony Brook University, Stony Brook, NY; Departments of Biochemistry, Stony Brook University, Stony Brook, NY; Departments of Pharmacology, Stony Brook University, Stony Brook, NY; Departments of Pathology, Stony Brook University, Stony Brook, NY.
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11
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Sugano E, Edwards G, Saha S, Wilmott LA, Grambergs RC, Mondal K, Qi H, Stiles M, Tomita H, Mandal N. Overexpression of acid ceramidase (ASAH1) protects retinal cells (ARPE19) from oxidative stress. J Lipid Res 2018; 60:30-43. [PMID: 30413652 DOI: 10.1194/jlr.m082198] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2017] [Revised: 10/26/2018] [Indexed: 01/08/2023] Open
Abstract
Over 11 million people in the United States alone have some form of age-related macular degeneration (AMD). Oxidative stress, cell death, and the degeneration of retinal pigment epithelial (RPE) cells contribute to AMD pathology. Recent evidence suggests that ceramide (Cer), a cellular sphingolipid mediator that acts as a second messenger to induce apoptosis, might play a role in RPE cell death. The lysosomal breakdown of Cer by acid ceramidase [N-acylsphingosine amidohydrolase (ASAH)1] into sphingosine (Sph) is the major source for Sph 1-phosphate production, which has an opposing role to Cer and provides cytoprotection. Here, we investigated the role of Cer in human RPE-derived ARPE19 cells under hydrogen peroxide-induced oxidative stress, and show that Cer and hexosyl-Cer levels increase in the oxidatively stressed ARPE19 cells, which can be prevented by overexpression of lysosomal ASAH1. This study demonstrates that oxidative stress generates sphingolipid death mediators in retinal cells and that induction of ASAH1 could rescue retinal cells from oxidative stress by hydrolyzing excess Cers.
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Affiliation(s)
- Eriko Sugano
- Division of Science and Engineering, Iwate University, Morioka 020-8551, Japan
| | - Genea Edwards
- Departments of Ophthalmology University of Tennessee Health Science Center, Memphis, TN 38163
| | - Saikat Saha
- Departments of Ophthalmology University of Tennessee Health Science Center, Memphis, TN 38163
| | - Lynda A Wilmott
- Departments of Ophthalmology University of Tennessee Health Science Center, Memphis, TN 38163
| | - Richard C Grambergs
- Departments of Ophthalmology University of Tennessee Health Science Center, Memphis, TN 38163
| | - Koushik Mondal
- Departments of Ophthalmology University of Tennessee Health Science Center, Memphis, TN 38163
| | - Hui Qi
- Department of Ophthalmology, University of Oklahoma Health Science Center, Oklahoma City, OK 73104
| | - Megan Stiles
- Department of Ophthalmology, University of Oklahoma Health Science Center, Oklahoma City, OK 73104
| | - Hiroshi Tomita
- Division of Science and Engineering, Iwate University, Morioka 020-8551, Japan
| | - Nawajes Mandal
- Departments of Ophthalmology University of Tennessee Health Science Center, Memphis, TN 38163 .,Department of Ophthalmology, University of Oklahoma Health Science Center, Oklahoma City, OK 73104.,Anatomy and Neurobiology, University of Tennessee Health Science Center, Memphis, TN 38163
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12
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Achkar IW, Mraiche F, Mohammad RM, Uddin S. Anticancer potential of sanguinarine for various human malignancies. Future Med Chem 2017; 9:933-950. [PMID: 28636454 DOI: 10.4155/fmc-2017-0041] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/28/2023] Open
Abstract
Sanguinarine (Sang) - a benzophenanthridine alkaloid extracted from Sanguinaria canadensis - exhibits antioxidant, anti-inflammatory, proapoptotic and growth inhibitory activities on tumor cells of various cancer types as established by in vivo and in vitro studies. Although the underlying mechanism of Sang antitumor activity is yet to be fully elucidated, Sang has displayed multiple biological effects, which remain to suggest its possible use in plant-derived treatments of human malignancies. This review covers the anticancer abilities of Sang including inhibition of aberrantly activated signal transduction pathways, induction of cell death and inhibition of cancer cell proliferation. It also highlights Sang-mediated inhibition of angiogenesis, inducing the expression of tumor suppressors, sensitization of cancer cells to standard chemotherapeutics to enhance their cytotoxic effects, while addressing the present need for further pharmacokinetic-based studies.
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Affiliation(s)
- Iman W Achkar
- Translational Research Institute, Hamad Medical Corporation, Doha, Qatar
| | | | - Ramzi M Mohammad
- Translational Research Institute, Hamad Medical Corporation, Doha, Qatar
| | - Shahab Uddin
- Translational Research Institute, Hamad Medical Corporation, Doha, Qatar
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13
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Radiation and Thyroid Cancer. Int J Mol Sci 2017; 18:ijms18050911. [PMID: 28445397 PMCID: PMC5454824 DOI: 10.3390/ijms18050911] [Citation(s) in RCA: 60] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2017] [Revised: 04/11/2017] [Accepted: 04/24/2017] [Indexed: 01/18/2023] Open
Abstract
Radiation-induced damage is a complex network of interlinked signaling pathways, which may result in apoptosis, cell cycle arrest, DNA repair, and cancer. The development of thyroid cancer in response to radiation, from nuclear catastrophes to chemotherapy, has long been an object of study. A basic overview of the ionizing and non-ionizing radiation effects of the sensitivity of the thyroid gland on radiation and cancer development has been provided. In this review, we focus our attention on experiments in cell cultures exposed to ionizing radiation, ultraviolet light, and proton beams. Studies on the involvement of specific genes, proteins, and lipids are also reported. This review also describes how lipids are regulated in response to the radiation-induced damage and how they are involved in thyroid cancer etiology, invasion, and migration and how they can be used as both diagnostic markers and drug targets.
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14
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Wang M, Xie F, Wen X, Chen H, Zhang H, Liu J, Zhang H, Zou H, Yu Y, Chen Y, Sun Z, Wang X, Zhang G, Yin C, Sun D, Gao J, Jiang B, Zhong Y, Lu Y. Therapeutic PEG-ceramide nanomicelles synergize with salinomycin to target both liver cancer cells and cancer stem cells. Nanomedicine (Lond) 2017; 12:1025-1042. [PMID: 28440698 DOI: 10.2217/nnm-2016-0408] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
AIM Salinomycin (SAL)-loaded PEG-ceramide nanomicelles (SCM) were prepared to target both liver cancer cells and cancer stem cells. MATERIALS & METHODS The synergistic ratio of SAL/PEG-ceramide was evaluated to prepare SCM, and the antitumor activity of SCM was examined both in vitro and in vivo. RESULTS SAL/PEG-ceramide molar ratio of 1:4 was chosen as the synergistic ratio, and SCM showed superior cytotoxic effect and increased apoptosis-inducing activity in both liver cancer cells and cancer stem cells. In vivo, SCM showed the best tumor inhibitory effect with a safety profile. CONCLUSION Thus, PEG-ceramide nanomicelles could serve as an effective and safe therapeutic drug carrier to deliver SAL into liver cancer, opening up the avenue of using PEG-ceramide as therapeutic drug carriers.
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Affiliation(s)
- Meiping Wang
- Department of Pharmaceutical Sciences, Second Military Medical University, 325 Guohe Road, Shanghai 200433, China
| | - Fangyuan Xie
- Department of Pharmaceutical Sciences, Second Military Medical University, 325 Guohe Road, Shanghai 200433, China.,Department of Pharmacy, Shanghai Eastern Hepatobiliary Surgery Hospital, 225 Changhai Road, Shanghai 200438, China
| | - Xikai Wen
- Department of Pharmaceutical Sciences, Second Military Medical University, 325 Guohe Road, Shanghai 200433, China
| | - Han Chen
- Department of General Surgery, 411 Hospital of Chinese People's Liberation Army, 15 East Jiangwan Road, Shanghai 200081, China
| | - Hai Zhang
- Department of Pharmacy, Shanghai Eastern Hepatobiliary Surgery Hospital, 225 Changhai Road, Shanghai 200438, China
| | - Junjie Liu
- Department of Pharmaceutical Sciences, Second Military Medical University, 325 Guohe Road, Shanghai 200433, China
| | - He Zhang
- Department of Pharmaceutical Sciences, Second Military Medical University, 325 Guohe Road, Shanghai 200433, China
| | - Hao Zou
- Department of Pharmaceutical Sciences, Second Military Medical University, 325 Guohe Road, Shanghai 200433, China
| | - Yuan Yu
- Department of Pharmaceutical Sciences, Second Military Medical University, 325 Guohe Road, Shanghai 200433, China
| | - Yan Chen
- Department of Pharmaceutical Sciences, Second Military Medical University, 325 Guohe Road, Shanghai 200433, China
| | - Zhiguo Sun
- Department of Pharmaceutical Sciences, Second Military Medical University, 325 Guohe Road, Shanghai 200433, China
| | - Xinxia Wang
- Department of Pharmacy, Shanghai Eastern Hepatobiliary Surgery Hospital, 225 Changhai Road, Shanghai 200438, China
| | - Guoqing Zhang
- Department of Pharmacy, Shanghai Eastern Hepatobiliary Surgery Hospital, 225 Changhai Road, Shanghai 200438, China
| | - Chuan Yin
- Department of Gastroenterology, Changzheng Hospital, Second Military Medical University, Shanghai 200003, China
| | - Duxin Sun
- Department of Pharmaceutical Sciences, University of Michigan, Ann Arbor, MI 48109, USA
| | - Jie Gao
- Department of Pharmaceutical Sciences, Second Military Medical University, 325 Guohe Road, Shanghai 200433, China.,Department of Pharmaceutical Sciences, University of Michigan, Ann Arbor, MI 48109, USA
| | - Beige Jiang
- Third Department of HepaticSurgery, Eastern Hepatobiliary Surgery Hospital, Second Military Medical University, 225 Changhai Road, Shanghai 200438, China
| | - Yanqiang Zhong
- Department of Pharmaceutical Sciences, Second Military Medical University, 325 Guohe Road, Shanghai 200433, China
| | - Ying Lu
- Department of Pharmaceutical Sciences, Second Military Medical University, 325 Guohe Road, Shanghai 200433, China
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15
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Rahman A, Thayyullathil F, Pallichankandy S, Galadari S. Hydrogen peroxide/ceramide/Akt signaling axis play a critical role in the antileukemic potential of sanguinarine. Free Radic Biol Med 2016; 96:273-89. [PMID: 27154977 DOI: 10.1016/j.freeradbiomed.2016.05.001] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/18/2015] [Revised: 04/27/2016] [Accepted: 05/01/2016] [Indexed: 12/29/2022]
Abstract
Dysregulation of apoptosis is a prime hallmark of leukemia. Therefore, drugs which restore the sensitivity of leukemic cells to apoptotic stimuli are promising candidates in the treatment of leukemia. Recently, we have demonstrated that sanguinarine (SNG), a benzophenanthridine alkaloid, isolated from Sanguinaria canadensis induces ROS-dependent ERK1/2 activation and autophagic cell death in human malignant glioma cells (Pallichankandy et al., 2015; [43]). In this study, we investigated the antileukemic potential of SNG in vitro, and further examined the molecular mechanisms of SNG-induced cell death. In human leukemic cells, SNG activated apoptotic cell death pathway characterized by activation of caspase cascade, DNA fragmentation and down-regulation of anti-apoptotic proteins. Importantly, we have identified a crucial role for hydrogen peroxide (H2O2)-dependent ceramide (Cer) generation in the facilitation of SNG-induced apoptosis. Additionally, we have found that SNG inhibits Akt, a key anti-apoptotic protein kinase by dephosphorylating it at Ser(473), leading to the dephosphorylation of its downstream targets, GSK3β and mTOR. Interestingly, inhibition of Cer generation, using acid sphingomyelinase inhibitor, significantly reduced the SNG-induced Akt dephosphorylation and apoptosis, whereas, activation of Cer generation using inhibitors of acid ceramidase and glucosylceramide synthase enhanced it. Furthermore, using a group of ceramide activated protein phosphatases (CAPPs) inhibitor (calyculin A, Okadaic acid, and phosphatidic acid), the involvement of protein phosphatase 1 form of CAPP in SNG-induced Akt dephosphorylation and apoptosis was demonstrated. Altogether, these results underscore a critical role for H2O2-Cer-Akt signaling axis in the antileukemic action of SNG.
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Affiliation(s)
- Anees Rahman
- Cell Signaling Laboratory, Department of Biochemistry, College of Medicine and Health Sciences, UAE University, P.O. Box 17666, Al Ain, Abu Dhabi, United Arab Emirates.
| | - Faisal Thayyullathil
- Cell Signaling Laboratory, Department of Biochemistry, College of Medicine and Health Sciences, UAE University, P.O. Box 17666, Al Ain, Abu Dhabi, United Arab Emirates.
| | - Siraj Pallichankandy
- Cell Signaling Laboratory, Department of Biochemistry, College of Medicine and Health Sciences, UAE University, P.O. Box 17666, Al Ain, Abu Dhabi, United Arab Emirates.
| | - Sehamuddin Galadari
- Cell Signaling Laboratory, Department of Biochemistry, College of Medicine and Health Sciences, UAE University, P.O. Box 17666, Al Ain, Abu Dhabi, United Arab Emirates; Al Jalila Foundation Research Centre, P.O. Box 300100, Dubai, United Arab Emirates.
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16
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Hernández-Corbacho MJ, Canals D, Adada MM, Liu M, Senkal CE, Yi JK, Mao C, Luberto C, Hannun YA, Obeid LM. Tumor Necrosis Factor-α (TNFα)-induced Ceramide Generation via Ceramide Synthases Regulates Loss of Focal Adhesion Kinase (FAK) and Programmed Cell Death. J Biol Chem 2015; 290:25356-73. [PMID: 26318452 DOI: 10.1074/jbc.m115.658658] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2015] [Indexed: 11/06/2022] Open
Abstract
Ceramide synthases (CerS1-CerS6), which catalyze the N-acylation of the (dihydro)sphingosine backbone to produce (dihydro)ceramide in both the de novo and the salvage or recycling pathway of ceramide generation, have been implicated in the control of programmed cell death. However, the regulation of the de novo pathway compared with the salvage pathway is not fully understood. In the current study, we have found that late accumulation of multiple ceramide and dihydroceramide species in MCF-7 cells treated with TNFα occurred by up-regulation of both pathways of ceramide synthesis. Nevertheless, fumonisin B1 but not myriocin was able to protect from TNFα-induced cell death, suggesting that ceramide synthase activity is crucial for the progression of cell death and that the pool of ceramide involved derives from the salvage pathway rather than de novo biosynthesis. Furthermore, compared with control cells, TNFα-treated cells exhibited reduced focal adhesion kinase and subsequent plasma membrane permeabilization, which was blocked exclusively by fumonisin B1. In addition, exogenously added C6-ceramide mimicked the effects of TNFα that lead to cell death, which were inhibited by fumonisin B1. Knockdown of individual ceramide synthases identified CerS6 and its product C16-ceramide as the ceramide synthase isoform essential for the regulation of cell death. In summary, our data suggest a novel role for CerS6/C16-ceramide as an upstream effector of the loss of focal adhesion protein and plasma membrane permeabilization, via the activation of caspase-7, and identify the salvage pathway as the critical mechanism of ceramide generation that controls cell death.
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Affiliation(s)
| | - Daniel Canals
- From the Stony Brook Cancer Center, the Department of Medicine, and
| | - Mohamad M Adada
- From the Stony Brook Cancer Center, the Department of Medicine, and
| | - Mengling Liu
- From the Stony Brook Cancer Center, the Department of Medicine, and
| | - Can E Senkal
- From the Stony Brook Cancer Center, the Department of Medicine, and
| | - Jae Kyo Yi
- From the Stony Brook Cancer Center, the Department of Medicine, and
| | - Cungui Mao
- From the Stony Brook Cancer Center, the Department of Medicine, and
| | - Chiara Luberto
- From the Stony Brook Cancer Center, the Department of Physiology and Biophysics, Stony Brook University, Health Sciences Center, Stony Brook, New York 11794 and
| | - Yusuf A Hannun
- From the Stony Brook Cancer Center, the Department of Medicine, and
| | - Lina M Obeid
- From the Stony Brook Cancer Center, the Department of Medicine, and the Northport Veterans Affairs Medical Center, Northport, New York 11768
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17
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Su X, Song H, Niu F, Yang K, Kou G, Wang X, Chen H, Li W, Guo S, Li J, Li B, Feng SS, Jiang J, Yin C, Gao J. Co-delivery of doxorubicin and PEGylated C16-ceramide by nanoliposomes for enhanced therapy against multidrug resistance. Nanomedicine (Lond) 2015; 10:2033-50. [PMID: 26084553 DOI: 10.2217/nnm.15.50] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
Aim: To develop novel nanoliposomes (Lip-ADR-Cer) codelivering doxorubicin (ADR) and PEGylated C16 ceramide (PEG-ceramide C16) to overcome multidrug resistance. Materials & methods: The antitumor activity and mechanism of Lip-ADR-Cer were evaluated. Results & conclusion: The IC50 of Lip-ADR-Cer after 48-h treatment with the MCF-7/ADR and HL-60/ADR cancer cells, both being ADR resistant, was 2.2- and 1.4-fold effective respectively versus the general nanoliposomes with no PEG-ceramide C16 (Lip-ADR). The antitumor assay in mice bearing MCF-7/ADR or HL-60/ADR xenograft tumors confirmed the superior antitumor activity of Lip-ADR-Cer over Lip-ADR. We found that the improved therapeutic effect of Lip-ADR-Cer may be attributed to both of the cytotoxic effect of PEG-ceramide C16 and glucosylceramide synthase overexpression in multidrug resistance cells.
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Affiliation(s)
- Xiao Su
- International Joint Cancer Institute, Second Military Medical University, 800 Xiangyin Road, Shanghai 200433, China
| | - Hao Song
- International Joint Cancer Institute, Second Military Medical University, 800 Xiangyin Road, Shanghai 200433, China
- College of Pharmacy, Liaocheng University, 1 Hu'nan Road, Liaocheng, Shandong 25200, PR China
- Centre for Stem Cell & Regenerative Medicine, Liaocheng People's Hospital, 67 Dongchang West Road, Liaocheng, Shangdong 252000, China
| | - Fangfang Niu
- International Joint Cancer Institute, Second Military Medical University, 800 Xiangyin Road, Shanghai 200433, China
| | - Kaixuan Yang
- International Joint Cancer Institute, Second Military Medical University, 800 Xiangyin Road, Shanghai 200433, China
| | - Geng Kou
- International Joint Cancer Institute, Second Military Medical University, 800 Xiangyin Road, Shanghai 200433, China
- College of Pharmacy, Liaocheng University, 1 Hu'nan Road, Liaocheng, Shandong 25200, PR China
| | - Xiaohang Wang
- Department of Gastroenterology, Changzheng Hospital, Second Military Medical University, Shanghai 200003, China
| | - Huaiwen Chen
- International Joint Cancer Institute, Second Military Medical University, 800 Xiangyin Road, Shanghai 200433, China
| | - Wei Li
- International Joint Cancer Institute, Second Military Medical University, 800 Xiangyin Road, Shanghai 200433, China
- College of Pharmacy, Liaocheng University, 1 Hu'nan Road, Liaocheng, Shandong 25200, PR China
| | - Shangjing Guo
- College of Pharmacy, Liaocheng University, 1 Hu'nan Road, Liaocheng, Shandong 25200, PR China
| | - Jun Li
- College of Pharmacy, Liaocheng University, 1 Hu'nan Road, Liaocheng, Shandong 25200, PR China
| | - Bohua Li
- International Joint Cancer Institute, Second Military Medical University, 800 Xiangyin Road, Shanghai 200433, China
- College of Pharmacy, Liaocheng University, 1 Hu'nan Road, Liaocheng, Shandong 25200, PR China
| | - Si-shen Feng
- International Joint Cancer Institute, Second Military Medical University, 800 Xiangyin Road, Shanghai 200433, China
- Department of Chemical & Biomolecular Engineering, National University of Singapore, Block E5, 02–11, 4 Engineering Drive 4, Singapore 117576, Singapore
- Suzhou NanoStar Biopharm Inc Ltd, BioBay, Bld B2, Unit 604, 218 Xing-Hu Street, Suzhou Industrial Park, Suzhou 215123, China
| | - Jianxin Jiang
- Department of Hepatobiliary Surgery, Hubei Province Tumor Hospital, Wuhan, Hubei 430079, China
| | - Chuan Yin
- Department of Gastroenterology, Changzheng Hospital, Second Military Medical University, Shanghai 200003, China
| | - Jie Gao
- International Joint Cancer Institute, Second Military Medical University, 800 Xiangyin Road, Shanghai 200433, China
- College of Pharmacy, Liaocheng University, 1 Hu'nan Road, Liaocheng, Shandong 25200, PR China
- Department of Pharmaceutical Sciences, Second Military Medical University, 325 Guohe Road, Shanghai 200433, China
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18
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In situ DOX-calcium phosphate mineralized CPT-amphiphilic gelatin nanoparticle for intracellular controlled sequential release of multiple drugs. Acta Biomater 2015; 15:191-9. [PMID: 25542535 DOI: 10.1016/j.actbio.2014.12.013] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2014] [Revised: 11/21/2014] [Accepted: 12/15/2014] [Indexed: 11/22/2022]
Abstract
A co-delivery strategy has been developed to achieve the synergistic effect of a hydrophobic drug (camptothecin, CPT) and a hydrophilic drug (doxorubicin, DOX) by utilizing the unique structure of amphiphilic gelatin/camptothecin @calcium phosphate-doxorubicin (AG/CPT@CaP-DOX) nanoparticles as a carriers in order to replace double emulsions while preserving the advantages of inorganic materials. The hydrophobic agent (CPT) was encapsulated via emulsion with an amphiphilic gelatin core, and subsequently mineralized by CaP-hydrophilic drug (DOX) through precipitation to form a CaP shell on the CPT-AG amphiphilic gelatin core so that drug molecules with different characteristics (i.e. hydrophobic and hydrophilic) can be encapsulated in different regions to avoid their interaction. The existence of the CaP shell can protect the DOX against free release and cause an increased transfer of DOX across membranes, overcoming multidrug resistance. Release studies from core-shell carriers showed the possibility of achieving sequential release of more than one type of drug by controlling the pH-sensitive CaP shell and degradable AG core. The highly pH-responsive behavior of the carrier can modulate the dual-drug-release of DOX/CPT, specifically in acidic intracellular pH environments. The AG/CPT@CaP-DOX nanoparticles also exhibited higher drug efficiencies against MCF-7/ADR cells than MCF-7 cells, thanks to a synergistic cell cycle arrest/apoptosis-inducing effect between CPT and DOX. As such, this core-shell system can serve as a general platform for the localized, controlled, sequential delivery of multiple drugs to treat several diseases, especially for multidrug-resistant cancer cells.
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19
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Babenko NA, Kharchenko VS. Modulation of Insulin Sensitivity of Hepatocytes by the Pharmacological Downregulation of Phospholipase D. Int J Endocrinol 2015; 2015:794838. [PMID: 26089893 PMCID: PMC4458285 DOI: 10.1155/2015/794838] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/05/2015] [Revised: 04/30/2015] [Accepted: 05/11/2015] [Indexed: 12/13/2022] Open
Abstract
Background. The role of phospholipase D (PLD) as a positive modulator of glucose uptake activation by insulin in muscle and adipose cells has been demonstrated. The role of PLD in the regulation of glucose metabolism by insulin in the primary hepatocytes has been determined in this study. Methods. For this purpose, we studied effects of inhibitors of PLD on glucose uptake and glycogen synthesis stimulation by insulin. To determine the PLD activity, the method based on determination of products of transphosphatidylation reaction, phosphatidylethanol or phosphatidylbutanol, was used. Results. Inhibition of PLD by a general antagonist (1-butanol) or specific inhibitor, halopemide, or N-hexanoylsphingosine, or by cellular ceramides accumulated in doxorubicin-treated hepatocytes decreased insulin-stimulated glucose metabolism. Doxorubicin-induced hepatocytes resistance to insulin action could be abolished by inhibition of ceramide production. Halopemide could nullify this effect. Addition of propranolol, as well as inhibitors of phosphatidylinositol 3-kinase (PI3-kinase) (wortmannin, LY294002) or suppressors of Akt phosphorylation/activity, luteolin-7-O-glucoside or apigenin-7-O-glucoside, to the culture media could block cell response to insulin action. Conclusion. PLD plays an important role in the insulin signaling in the hepatocytes. PLD is activated downstream of PI3-kinase and Akt and is highly sensitive to ceramide content in the liver cells.
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Affiliation(s)
- Nataliya A. Babenko
- Department of Physiology of Ontogenesis, Biology Research Institute, Karazin Kharkov National University, Svobody Square 4, Kharkov 61022, Ukraine
- *Nataliya A. Babenko:
| | - Vitalina S. Kharchenko
- Department of Physiology of Ontogenesis, Biology Research Institute, Karazin Kharkov National University, Svobody Square 4, Kharkov 61022, Ukraine
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20
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Abdel Shakor AB, Atia M, Ismail IA, Alshehri A, El-Refaey H, Kwiatkowska K, Sobota A. Curcumin induces apoptosis of multidrug-resistant human leukemia HL60 cells by complex pathways leading to ceramide accumulation. Biochim Biophys Acta Mol Cell Biol Lipids 2014; 1841:1672-82. [DOI: 10.1016/j.bbalip.2014.09.006] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2014] [Revised: 09/08/2014] [Accepted: 09/09/2014] [Indexed: 12/20/2022]
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21
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Siow D, Sunkara M, Morris A, Wattenberg B. Regulation of de novo sphingolipid biosynthesis by the ORMDL proteins and sphingosine kinase-1. Adv Biol Regul 2014; 57:42-54. [PMID: 25319495 DOI: 10.1016/j.jbior.2014.09.002] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2014] [Revised: 09/03/2014] [Accepted: 09/04/2014] [Indexed: 12/11/2022]
Abstract
Sphingolipids are a diverse set of structurally and metabolically related lipids that have numerous functions in cell structure and signaling. The regulation of these lipids is critical for normal cell function and disregulation has been implicated in pathophysiological conditions such as cancer and inflammation. Here we examine control of the initiating, and rate limiting, enzyme in sphingolipid biosynthesis, serine palmitoyltransferase (SPT). We find that de novo synthesis of sphingolipid is stimulated by a number of cancer chemotherapeutics, suggesting that this may be an important aspect of their cytotoxic effects. The three ORMDL proteins are membrane proteins of the endoplasmic reticulum related to the yeast Orm proteins, which have been shown to be homeostatic regulators of SPT. We find that the ORMDL proteins are also negative regulators of SPT that transmit cellular levels of sphingolipids to SPT. The three isoforms have redundant functions in this system. The sphingosine kinases (sphingosine kinase-1 and -2) phosphorylate both sphingosine, which is released from ceramide, but also dihydrosphingosine, which is in the de novo biosynthetic pathway. We therefore examined the role of the sphingosine kinases in controlling de novo ceramide biosynthesis and find that sphingosine kinase-1 does indeed act as a negative regulator of this pathway. This establishes that sphingosine kinase, in addition to producing sphingosine-1-phosphate as a signaling molecule, also consumes dihydrosphingosine to regulate ceramide synthesis. Our studies demonstrate that there are multiple mechanisms of regulation of SPT and suggest that these regulators are important mediators of cell stress responses.
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Affiliation(s)
- Deanna Siow
- James Graham Brown Cancer Center, University of Louisville School of Medicine, 505 South Hancock St., Louisville, KY 40202, USA
| | - Manjula Sunkara
- Division of Cardiovascular Medicine, Gill Heart Institute, University of Kentucky Lexington, Lexington, KY 40536, USA; Department of Veterans Affairs Medical Center, Lexington, KY, USA
| | - Andrew Morris
- Division of Cardiovascular Medicine, Gill Heart Institute, University of Kentucky Lexington, Lexington, KY 40536, USA; Department of Veterans Affairs Medical Center, Lexington, KY, USA
| | - Binks Wattenberg
- James Graham Brown Cancer Center, University of Louisville School of Medicine, 505 South Hancock St., Louisville, KY 40202, USA; Department of Biochemistry and Molecular Biology, University of Louisville School of Medicine, 505 South Hancock St., Louisville, KY 40202, USA; Department of Pharmacology and Toxicology, University of Louisville School of Medicine, 505 South Hancock St., Louisville, KY 40202, USA.
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22
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Taniguchi M, Okazaki T. The role of sphingomyelin and sphingomyelin synthases in cell death, proliferation and migration—from cell and animal models to human disorders. Biochim Biophys Acta Mol Cell Biol Lipids 2014; 1841:692-703. [DOI: 10.1016/j.bbalip.2013.12.003] [Citation(s) in RCA: 119] [Impact Index Per Article: 11.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2013] [Revised: 12/06/2013] [Accepted: 12/09/2013] [Indexed: 12/16/2022]
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23
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Fu Q, Duan X, Yan S, Wang L, Zhou Y, Jia S, Du J, Wang X, Zhang Y, Zhan L. Bioluminescence imaging of caspase-3 activity in mouse liver. Apoptosis 2014; 18:998-1007. [PMID: 23592258 DOI: 10.1007/s10495-013-0849-z] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Apoptosis is an essential process for the maintenance of liver physiology. The ability to noninvasively image apoptosis in livers would provide unique insights into its role in liver disease processes. In the present work, we established a stable mouse model by hydrodynamics methods to study the activity of caspase-3 and evaluate the effect of the apoptosis inhibitors in mouse livers under true physiological conditions by bioluminescence imaging. The reporter plasmid attB-ANLuc(DEVD)BCLuc that contains fragment of attB and ANLuc(DEVD)BCLuc was codelivered with the mouse-codon optimized φC31 (φC31o) integrase plasmids specifically to mouse liver by hydrodynamic injection procedure. Then, φC31o integrase mediated intramolecular recombination between wild-type attB and attP site in mice, and thus the reporter expression cassette attB-ANLuc(DEVD)BCLuc was integrated permanently into mouse liver chromosome. We used these mice to characterize in vivo activation of caspase-3 upon treatment with LPS/D-GalN. Our data show that liver apoptosis could be reflected by the activity of luciferase. The shRNA targeting caspase-3 protein or apoptosis inhibitors could effectively downregulate luciferase activity in vivo. Also, this model could be used to measure caspase-3 activation during inflammatory and infectious events in vivo as verified by infected with MHV-3. This model could be used for screening anti-apoptosis compounds target mouse livers.
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Affiliation(s)
- Qiuxia Fu
- Laboratory of Blood-borne Virus, Beijing Institute of Transfusion Medicine, 27(9) Tai Ping Road, 100850 Beijing, China
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Truman JP, García-Barros M, Obeid LM, Hannun YA. Evolving concepts in cancer therapy through targeting sphingolipid metabolism. Biochim Biophys Acta Mol Cell Biol Lipids 2013; 1841:1174-88. [PMID: 24384461 DOI: 10.1016/j.bbalip.2013.12.013] [Citation(s) in RCA: 74] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2013] [Revised: 12/18/2013] [Accepted: 12/21/2013] [Indexed: 12/29/2022]
Abstract
Traditional methods of cancer treatment are limited in their efficacy due to both inherent and acquired factors. Many different studies have shown that the generation of ceramide in response to cytotoxic therapy is generally an important step leading to cell death. Cancer cells employ different methods to both limit ceramide generation and to remove ceramide in order to become resistant to treatment. Furthermore, sphingosine kinase activity, which phosphorylates sphingosine the product of ceramide hydrolysis, has been linked to multidrug resistance, and can act as a strong survival factor. This review will examine several of the most frequently used cancer therapies and their effect on both ceramide generation and the mechanisms employed to remove it. The development and use of inhibitors of sphingosine kinase will be focused upon as an example of how targeting sphingolipid metabolism may provide an effective means to improve treatment response rates and reduce associated treatment toxicity. This article is part of a Special Issue entitled Tools to study lipid functions.
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Affiliation(s)
- Jean-Philip Truman
- Health Science Center, Stony Brook University, 100 Nicolls Road, T15, 023, 11794 Stony Brook, NY, USA.
| | - Mónica García-Barros
- Health Science Center, Stony Brook University, 100 Nicolls Road, T15, 023, 11794 Stony Brook, NY, USA.
| | - Lina M Obeid
- Northport Veterans Affairs Medical Center, Northport, NY 11768, USA; Health Science Center, Stony Brook University, 100 Nicolls Road, L4, 178, 11794 Stony Brook, NY, USA.
| | - Yusuf A Hannun
- Department of Medicine and the Stony Brook Cancer Center, Health Science Center, Stony Brook University, 100 Nicolls Road, L4, 178, 11794 Stony Brook, NY, USA.
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Abstract
Chemotherapy is frequently used to treat primary or metastatic cancers, but intrinsic or acquired drug resistance limits its efficiency. Sphingolipids are important regulators of various cellular processes including proliferation, apoptosis, differentiation, angiogenesis, stress, and inflammatory responses which are linked to various aspects of cancer, like tumor growth, neoangiogenesis, and response to chemotherapy. Ceramide, the central molecule of sphingolipid metabolism, generally mediates antiproliferative and proapoptotic functions, whereas sphingosine-1-phosphate and other derivatives have opposing effects. Among the variety of enzymes that control ceramide generation, acid or neutral sphingomyelinases and ceramide synthases are important targets to allow killing of cancer cells by chemotherapeutic drugs. On the contrary, glucosylceramide synthase, ceramidase, and sphingosine kinase are other targets driving cancer cell resistance to chemotherapy. This chapter focuses on ceramide-based mechanisms leading to cancer therapy sensitization or resistance which could have some impacts on the development of novel cancer therapeutic strategies.
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Kartal Yandım M, Apohan E, Baran Y. Therapeutic potential of targeting ceramide/glucosylceramide pathway in cancer. Cancer Chemother Pharmacol 2012; 71:13-20. [PMID: 23073611 DOI: 10.1007/s00280-012-1984-x] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2012] [Accepted: 09/17/2012] [Indexed: 12/25/2022]
Abstract
Sphingolipids including ceramides and its derivatives such as ceramide-1-phosphate, glucosylceramide (GlcCer), and sphingosine-1-phosphate are essential structural components of cell membranes. They now recognized as novel bioeffector molecules which control various aspects of cell growth, proliferation, apoptosis, and drug resistance. Ceramide, the central molecule of sphingolipid metabolism, generally mediates anti-proliferative responses such as inhibition of cell growth, induction of apoptosis, and/or modulation of senescence. There are two major classes of sphingolipids. One of them is glycosphingolipids which are synthesized from the hydrophobic molecule, ceramide. GlcCer, generated by glucosylceramide synthase (GCS) that transfers the glucose from UDP-glucose to ceramide, is an important glycosphingolipid metabolic intermediate. GCS regulates the balance between apoptotic ceramide and antiapoptotic GlcCer. Downregulation or inhibition of GCS results in increased apoptosis and decreased drug resistance. The mechanism underlying the drug resistance which develops with increased glucosylceramide expression is associated with P-glycoprotein. In various types of cancers, overexpression of GCS has been observed which renders GCS a good target for the treatment of cancer. This review summarizes our current knowledge on the structure and functions of glucosylceramide synthase and glucosylceramide and on the roles of glucosylceramide synthase in cancer therapy and drug resistance.
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Affiliation(s)
- Melis Kartal Yandım
- Department of Molecular Biology and Genetics, Faculty of Science, İzmir Institute of Technology, Urla, Izmir 35430, Turkey
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Extracellular matrix proteins modulate antimigratory and apoptotic effects of Doxorubicin. CHEMOTHERAPY RESEARCH AND PRACTICE 2012; 2012:268681. [PMID: 22811904 PMCID: PMC3395309 DOI: 10.1155/2012/268681] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/03/2012] [Accepted: 04/30/2012] [Indexed: 01/13/2023]
Abstract
Anticancer drug resistance is a multifactorial process that includes acquired and de novo drug resistances. Acquired resistance develops during treatment, while de novo resistance is the primary way for tumor cells to escape chemotherapy. Tumor microenvironment has been recently shown to be one of the important factors contributing to de novo resistance and called environment-mediated drug resistance (EMDR). Two forms of EMDR have been described: soluble factor-mediated drug resistance (SFM-DR) and cell adhesion-mediated drug resistance (CAM-DR). Anthracyclines, among the most potent chemotherapeutic agents, are widely used in clinics against hematopoietic and solid tumors. Their main mechanism of action relies on the inhibition of topoisomerase I and/or II and the induction of apoptosis. Beyond this well-known antitumor activity, it has been recently demonstrated that anthracyclines may display potent anti-invasive effects when used at subtoxic concentrations. In this paper, we will describe two particular modes of EMDR by which microenvironment may influence tumor-cell response to one of these anthracyclines, doxorubicin. The first one considers the influence of type I collagen on the antimigratory effect of doxorubicin (CAM-DR). The second considers the protection of tumor cells by thrombospondin-I against doxorubicin-induced apoptosis (SFM-DR).
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Kizhakkayil J, Thayyullathil F, Chathoth S, Hago A, Patel M, Galadari S. Glutathione regulates caspase-dependent ceramide production and curcumin-induced apoptosis in human leukemic cells. Free Radic Biol Med 2012; 52:1854-64. [PMID: 22387197 DOI: 10.1016/j.freeradbiomed.2012.02.026] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/21/2011] [Revised: 02/20/2012] [Accepted: 02/22/2012] [Indexed: 10/28/2022]
Abstract
Depletion of intracellular glutathione (GSH) is the prime hallmark of the progression of apoptosis. Previously, we reported that curcumin induces reactive oxygen species (ROS)-mediated depletion of GSH, which leads to caspase-dependent and independent apoptosis in mouse fibroblast cells (F. Thayyullathil et al., Free Radic. Biol. Med.45, 1403-1412, 2008). In this study, we investigated the antileukemic potential of curcumin in vitro, and we further examined the molecular mechanisms of curcumin-induced apoptosis in human leukemic cells. Curcumin suppresses the growth of human leukemic cells via ROS-independent GSH depletion, which leads to caspase activation, inhibition of sphingomyelin synthase (SMS) activity, and induction of ceramide (Cer) generation. Pretreatment of leukemic cells with carbobenzoxy-Val-Ala-Asp fluoromethylketone, a universal inhibitor of caspases, abrogates the SMS inhibition and Cer generation, and in turn prevents curcumin-induced cell death. Curcumin treatment of leukemic cells also downregulates the expression of the inhibitor of apoptosis proteins (IAPs), phospho-Akt, c-Myc, and cyclin D1. Extracellular supplementation with GSH attenuates curcumin-induced depletion of GSH, caspase-dependent inhibition of SMS, Cer generation, and downregulation of IAPs, whereas, L-D-buthionine sulfoximine, a widely used inhibitor of GSH synthesis, potentiates GSH depletion, Cer generation, and apoptosis induced by curcumin. Taken together, our findings provide evidence suggesting for the first time that GSH regulates caspase-dependent inhibition of SMS activity, Cer generation, and apoptosis induced by curcumin in human leukemic cells.
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Affiliation(s)
- Jaleel Kizhakkayil
- Cell Signaling Laboratory, Department of Biochemistry, Faculty of Medicine and Health Sciences, UAE University, Al Ain, United Arab Emirates
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Abstract
Sphingolipid metabolism in metazoan cells consists of a complex interconnected web of numerous enzymes, metabolites and modes of regulation. At the centre of sphingolipid metabolism reside CerSs (ceramide synthases), a group of enzymes that catalyse the formation of ceramides from sphingoid base and acyl-CoA substrates. From a metabolic perspective, these enzymes occupy a unique niche in that they simultaneously regulate de novo sphingolipid synthesis and the recycling of free sphingosine produced from the degradation of pre-formed sphingolipids (salvage pathway). Six mammalian CerSs (CerS1-CerS6) have been identified. Unique characteristics have been described for each of these enzymes, but perhaps the most notable is the ability of individual CerS isoforms to produce ceramides with characteristic acyl-chain distributions. Through this control of acyl-chain length and perhaps in a compartment-specific manner, CerSs appear to regulate multiple aspects of sphingolipid-mediated cell and organismal biology. In the present review, we discuss the function of CerSs as critical regulators of sphingolipid metabolism, highlight their unique characteristics and explore the emerging roles of CerSs in regulating programmed cell death, cancer and many other aspects of biology.
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30
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Palma CD, Perrotta C. Ceramide as a target of chemotherapy: its role in apoptosis and autophagy. ACTA ACUST UNITED AC 2012. [DOI: 10.2217/clp.11.71] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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Augmentation of chemotherapy-triggered glioma cell apoptosis by blockade of arachidonic acid metabolism--the potential role of ceramide accumulation. Med Hypotheses 2011; 77:726-33. [PMID: 21862232 DOI: 10.1016/j.mehy.2011.07.025] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/01/2011] [Accepted: 07/07/2011] [Indexed: 12/13/2022]
Abstract
There has been recent interest in using cyclooxygenase-2 inhibitors in an effort to increase the efficacy of chemotherapy and/or radiation for treatment of malignant brain tumors. Although the mechanism is unclear, one result may be the accumulation of arachidonic acid (AA). AA is the key substrate for several biochemical pathways involved in the inflammatory cascade, including the cyclooxygenase (COX) enzymes. Cyclooxygenase-1 and cyclooxygenase-2 metabolize AA to produce prostaglandins and thromboxanes. Levels of these enzymes and their products are upregulated in gliomas, especially in malignant tumors. Likewise, the enzyme 5-lipoxygenase, also elevated in malignant gliomas, metabolizes AA to produce leukotrienes. Alternatively, enzymes of the cytochrome p450 family can metabolize AA to various products, some of which may aid glioma growth and angiogenesis. Unmetabolized AA activates the enzyme neutral sphingomyelinase, which produces ceramide, a second messenger and potent activator of apoptosis. It is hypothesized that simultaneous blockade of the COX, lipoxygenase, and/or cytochrome p450-mediated pathways would lead to greater accumulation of intracellular AA, resulting in elevated ceramide levels, thereby priming glioma cells for treatment-induced apoptotic cell death. Manipulation of AA/bioactive lipid metabolism, using readily available, well-tolerated medications may have the potential to increase the efficacy of currently used glioma treatments.
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El Btaouri H, Morjani H, Greffe Y, Charpentier E, Martiny L. Role of JNK/ATF-2 pathway in inhibition of thrombospondin-1 (TSP-1) expression and apoptosis mediated by doxorubicin and camptothecin in FTC-133 cells. BIOCHIMICA ET BIOPHYSICA ACTA-MOLECULAR CELL RESEARCH 2011; 1813:695-703. [PMID: 21333695 DOI: 10.1016/j.bbamcr.2011.02.004] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/17/2010] [Revised: 02/03/2011] [Accepted: 02/07/2011] [Indexed: 11/25/2022]
Abstract
Our previous studies have shown that camptothecin and doxorubicin triggered ceramide accumulation via de novo synthesis pathway. De novo ceramide generation was responsible for the drug-induced apoptosis through a caspase-3-dependent pathway and a decrease of thrombospondin-1 expression in human thyroid carcinoma FTC-133 cells. Here, we demonstrate that Jun N-terminal kinases play a critical role in camptothecin- and doxorubicin-induced down-regulation of thrombospondin-1 expression: i) de novo ceramide synthesis pathway activates Jun N-terminal kinase 1/2 resulting in activating transcription factor 2 phosphorylation; ii) cell treatment by SP600125, a Jun N-terminal kinase specific inhibitor, strongly reduced activating transcription factor 2 phosphorylation and completely abolished camptothecin and doxorubicin effects; and iii) activating transcription factor 2 expression silencing greatly attenuated camptothecin- and doxorubicin-induced down-regulation of thrombospondin-1 expression and apoptosis. The set of our data established that camptothecin- and doxorubicin-induced activation of Jun N-terminal kinase/activating transcription factor 2 pathway via de novo ceramide synthesis down-regulates thrombospondin-1 expression and apoptosis in human thyroid carcinoma FTC-133 cells. This article is part of a Special Issue entitled: 11th European Symposium on Calcium.
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Affiliation(s)
- Hassan El Btaouri
- Laboratoire SiRMa (Signalisation Cellulaire et Récepteurs Matriciels), UMR-CNRS 6237, UFR Sciences, Reims, France.
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Mao Z, Sun W, Xu R, Novgorodov S, Szulc ZM, Bielawski J, Obeid LM, Mao C. Alkaline ceramidase 2 (ACER2) and its product dihydrosphingosine mediate the cytotoxicity of N-(4-hydroxyphenyl)retinamide in tumor cells. J Biol Chem 2010; 285:29078-90. [PMID: 20628055 PMCID: PMC2937939 DOI: 10.1074/jbc.m110.105296] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2010] [Revised: 07/09/2010] [Indexed: 11/06/2022] Open
Abstract
Increased generation of dihydrosphingosine (DHS), a bioactive sphingolipid, has been implicated in the cytotoxicity of the synthetic retinoid N-(4-hydroxyphenyl)retinamide (4-HPR) in tumor cells. However, how 4-HPR increases DHS remains unclear. Here we demonstrate that 4-HPR increases the expression of ACER2, which catalyzes the hydrolysis of dihydroceramides to generate DHS, and that ACER2 up-regulation plays a key role in mediating the 4-HPR-induced generation of DHS as well as the cytotoxicity of 4-HPR in tumor cells. Treatment with 4-HPR induced the accumulation of dihydroceramides (DHCs) in tumor cells by inhibiting dihydroceramide desaturase (DES) activity, which catalyzes the conversion of DHCs to ceramides. Treatment with 4-HPR also increased ACER2 expression through a retinoic acid receptor-independent and caspase-dependent manner. Overexpression of ACER2 augmented the 4-HPR-induced generation of DHS as well as 4-HPR cytotoxicity, and 4-HPR-induced death in tumor cells, whereas knocking down ACER2 had the opposite effects. ACER2 overexpression, along with treatment with GT11, another DES inhibitor, markedly increased cellular DHS, leading to tumor cell death, whereas ACER2 overexpression or GT11 treatment alone failed to do so, suggesting that both ACER2 up-regulation and DES inhibition are necessary and sufficient to mediate 4-HPR-induced DHS accumulation, cytotoxicity, and death in tumor cells. Taken together, these results suggest that up-regulation of the ACER2/DHS pathway mediates the cytotoxicity of 4-HPR in tumor cells and that up-regulating or activating ACER2 may improve the anti-cancer activity of 4-HRR and other DHC-inducing agents.
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Affiliation(s)
| | - Wei Sun
- From the Department of Medicine and
| | | | | | - Zdzislaw M. Szulc
- the Department of Biochemistry and Molecular Biology, Medical University of South Carolina and
| | - Jacek Bielawski
- the Department of Biochemistry and Molecular Biology, Medical University of South Carolina and
| | - Lina M. Obeid
- From the Department of Medicine and
- the Department of Biochemistry and Molecular Biology, Medical University of South Carolina and
- the Ralph H. Johnson Veterans Administration Hospital, Charleston, South Carolina 29425
| | - Cungui Mao
- From the Department of Medicine and
- the Department of Biochemistry and Molecular Biology, Medical University of South Carolina and
- the Ralph H. Johnson Veterans Administration Hospital, Charleston, South Carolina 29425
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Exogenous cell-permeable C6 ceramide sensitizes multiple cancer cell lines to Doxorubicin-induced apoptosis by promoting AMPK activation and mTORC1 inhibition. Oncogene 2010; 29:6557-68. [PMID: 20802518 DOI: 10.1038/onc.2010.379] [Citation(s) in RCA: 118] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
New chemotherapy-enhancing strategies are needed for better cancer therapy. Previous studies suggest that exogenous cell-permeable C6 ceramide may be a useful adjunct to the anti-tumor effects of chemotherapeutic agents (such as Taxol) against multiple cancers. Here we demonstrate that exogenous cell-permeable C6 ceramide largely sensitizes multiple progressive cancer cell lines to Doxorubicin-induced cell death and apoptosis. We found for the first time that Doxorubicin induces AMP-activated protein kinase (AMPK) activation in a reactive oxygen species-dependent manner. Activation of AMPK contributes to Doxorubicin-induced cancer cell death and apoptosis. Inhibition of AMPK by small interfering RNA knockdown or a pharmacological inhibitor reduces Doxorubicin-induced cancer cell apoptosis, whereas AMPK activator AICAR enhances it. Importantly, we found that C6 ceramide largely enhances Doxorubicin-induced activation of AMPK, which leads to mTOR complex 1 inhibition and chemo-sensitization. Our data suggest that the combination of C6 ceramide with traditional chemotherapy drugs such as Doxorubicin may have the potential to be used as a new therapeutic intervention against multiple cancers.
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Beckham TH, Elojeimy S, Cheng JC, Turner LS, Hoffman SR, Norris JS, Liu X. Targeting sphingolipid metabolism in head and neck cancer: rational therapeutic potentials. Expert Opin Ther Targets 2010; 14:529-39. [PMID: 20334489 DOI: 10.1517/14728221003752768] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
IMPORTANCE OF THE FIELD Ceramide accumulation has been shown to be a conserved mechanism of apoptosis initiation in normal physiological processes as well as in response to cancer treatments. Therefore, it is unsurprising that many cancers develop aberrations of sphingolipid metabolism that prevent the accumulation of ceramide, whether by reduction of ceramide generation or by enhanced ceramide catabolism, particularly dangerous when catabolism leads to generation of pro-tumor sphingosine-1-phosphate and ceramide-1-phosphate. Numerous studies have now implicated dysregulation of sphingolipid metabolism in head and neck cancers. AREAS COVERED IN THIS REVIEW This review highlights the importance of sphingolipid metabolism and brings sphingolipid metabolism to the forefront in the investigation of novel therapies for head and neck cancer. It reviews sphingolipid-centric therapies under investigation in preclinical and clinical trials of cancers of the head and neck. WHAT THE READER WILL GAIN The roles of sphingolipids and sphingolipid metabolism in cancer are reviewed and the reader will be brought up to date with discoveries in the field of sphingolipid metabolism in head and neck cancer. TAKE HOME MESSAGE As treatments for head and neck cancers are currently limited, the potential of targeting sphingolipid metabolism should be taken into consideration as we seek novel ways to combat this group of tumors.
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Affiliation(s)
- Thomas H Beckham
- Medical University of South Carolina, Department of Biochemistry & Molecular Biology, 173 Ashley Avenue, MSC 504, Charleston, South Carolina 29425-5040, USA.
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Knapp P, Baranowski M, Knapp M, Zabielski P, Błachnio-Zabielska AU, Górski J. Altered sphingolipid metabolism in human endometrial cancer. Prostaglandins Other Lipid Mediat 2010; 92:62-6. [DOI: 10.1016/j.prostaglandins.2010.03.002] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2010] [Revised: 02/22/2010] [Accepted: 03/03/2010] [Indexed: 01/03/2023]
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Abstract
Glucosylceramide has a unique and often ambiguous role in mammalian cells. Activation of glucosylceramide synthase, the enzyme that places a glucosyl moiety onto ceramide, is the first pathway-committed step to the production of more complex glycosphingolipids such as lactosylceramide and gangliosides. Alterations in the level of glucosylceramide are noted in cells and tissues in response to cardiovascular disease, diabetes, skin disorders and cancer. Overall, upregulation of glucosylceramide offers cellular protection and primes certain cells for proliferation. However, prolonged overabundance of glucosylceramide is detrimental, as seen in Gaucher disease in humans.
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A new mixed-backbone oligonucleotide against glucosylceramide synthase sensitizes multidrug-resistant tumors to apoptosis. PLoS One 2009; 4:e6938. [PMID: 19742320 PMCID: PMC2735002 DOI: 10.1371/journal.pone.0006938] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2009] [Accepted: 08/05/2009] [Indexed: 12/13/2022] Open
Abstract
Enhanced ceramide glycosylation catalyzed by glucosylceramide synthase (GCS) limits therapeutic efficiencies of antineoplastic agents including doxorubicin in drug-resistant cancer cells. Aimed to determine the role of GCS in tumor response to chemotherapy, a new mixed-backbone oligonucleotide (MBO-asGCS) with higher stability and efficiency has been generated to silence human GCS gene. MBO-asGCS was taken up efficiently in both drug-sensitive and drug-resistant cells, but it selectively suppressed GCS overexpression, and sensitized drug-resistant cells. MBO-asGCS increased doxorubicin sensitivity by 83-fold in human NCI/ADR-RES, and 43-fold in murine EMT6/AR1 breast cancer cells, respectively. In tumor-bearing mice, MBO-asGCS treatment dramatically inhibited the growth of multidrug-resistant NCI/ADR-RE tumors, decreasing tumor volume to 37%, as compared with scrambled control. Furthermore, MBO-asGCS sensitized multidrug-resistant tumors to chemotherapy, increasing doxorubicin efficiency greater than 2-fold. The sensitization effects of MBO-asGCS relied on the decreases of gene expression and enzyme activity of GCS, and on the increases of C(18)-ceramide and of caspase-executed apoptosis. MBO-asGCS was accumulation in tumor xenografts was greater in other tissues, excepting liver and kidneys; but MBO-asGCS did not exert significant toxic effects on liver and kidneys. This study, for the first time in vivo, has demonstrated that GCS is a promising therapeutic target for cancer drug resistance, and MBO-asGCS has the potential to be developed as an antineoplastic agent.
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