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Hao C, Chen P, Setrerrahmane S, Xu H. A peptide-salinomycin conjugate with a bystander effect reduces the stemness characteristics of ovarian cancer cells and enhances drug sensitivity. Eur J Med Chem 2024; 276:116701. [PMID: 39067438 DOI: 10.1016/j.ejmech.2024.116701] [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: 05/16/2024] [Revised: 07/07/2024] [Accepted: 07/18/2024] [Indexed: 07/30/2024]
Abstract
Salinomycin (Sal) has attracted considerable attention in the field of tumor treatment, especially for its inhibitory effect on cancer stem cells (CSCs) and drug-resistant tumor cells. However, its solubility and targeting specificity pose significant challenges to its pharmaceutical development. Sal-A6, a novel peptide-drug conjugate (PDC), was formed by linking the peptide A6 targeting the CSC marker CD44 with Sal using a specific linker. This conjugation markedly enhances the physicochemical properties of Sal and compared to Sal, Sal-A6 demonstrated a significantly increased activity against ovarian cancer. Furthermore, Sal-A6, employing a disulfide bond as a linker, exhibited bystander killing effect. Moreover, it induces substantial cytotoxic effect on both cancer stem cells and drug-resistant cells in addition to enhance chemosensitivity of resistant ovarian cancer cells. In summary, the results indicated that Sal-A6, a novel PDC derived from Sal, has potential therapeutic applications in the treatment of ovarian cancer and drug-resistant patients. Additionally, this discovery offers insights for developing PDC-type drugs using Sal as a foundation.
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Affiliation(s)
- Chaowei Hao
- The Engineering Research Center of Synthetic Polypeptide Drug Discovery and Evaluation, Jiangsu Province, China Pharmaceutical University, Nanjing 210009, P.R. China; State Key Laboratory of Natural Medicines, Ministry of Education, China Pharmaceutical University, Nanjing, 210009, China
| | - Peng Chen
- The Engineering Research Center of Synthetic Polypeptide Drug Discovery and Evaluation, Jiangsu Province, China Pharmaceutical University, Nanjing 210009, P.R. China; State Key Laboratory of Natural Medicines, Ministry of Education, China Pharmaceutical University, Nanjing, 210009, China
| | | | - Hanmei Xu
- The Engineering Research Center of Synthetic Polypeptide Drug Discovery and Evaluation, Jiangsu Province, China Pharmaceutical University, Nanjing 210009, P.R. China; State Key Laboratory of Natural Medicines, Ministry of Education, China Pharmaceutical University, Nanjing, 210009, China.
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2
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Liu X, Zhao Z, Dai W, Liao K, Sun Q, Chen D, Pan X, Feng L, Ding Y, Wei S. The Development of Immunotherapy for the Treatment of Recurrent Glioblastoma. Cancers (Basel) 2023; 15:4308. [PMID: 37686584 PMCID: PMC10486426 DOI: 10.3390/cancers15174308] [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: 07/19/2023] [Revised: 08/04/2023] [Accepted: 08/04/2023] [Indexed: 09/10/2023] Open
Abstract
Recurrent glioblastoma (rGBM) is a highly aggressive form of brain cancer that poses a significant challenge for treatment in neuro-oncology, and the survival status of patients after relapse usually means rapid deterioration, thus becoming the leading cause of death among patients. In recent years, immunotherapy has emerged as a promising strategy for the treatment of recurrent glioblastoma by stimulating the body's immune system to recognize and attack cancer cells, which could be used in combination with other treatments such as surgery, radiation, and chemotherapy to improve outcomes for patients with recurrent glioblastoma. This therapy combines several key methods such as the use of monoclonal antibodies, chimeric antigen receptor T cell (CAR-T) therapy, checkpoint inhibitors, oncolytic viral therapy cancer vaccines, and combination strategies. In this review, we mainly document the latest immunotherapies for the treatment of glioblastoma and especially focus on rGBM.
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Affiliation(s)
- Xudong Liu
- College of Life Sciences, University of Chinese Academy of Sciences, Beijing 100049, China; (X.L.); (Y.D.)
| | - Zihui Zhao
- School of Medicine, Shanghai Jiao Tong University, Shanghai 200011, China;
| | - Wufei Dai
- Department of Plastic and Reconstructive Surgery, Shanghai Key Laboratory of Tissue Engineering Research, Shanghai Ninth People’s Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai 200011, China;
| | - Kuo Liao
- School of Biology and Biological Engineering, South China University of Technology, Guangzhou 510006, China;
| | - Qi Sun
- School of Public Health, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong, China; (Q.S.); (L.F.)
| | - Dongjiang Chen
- Division of Neuro-Oncology, USC Keck Brain Tumor Center, University of Southern California Keck School of Medicine, Los Angeles, CA 90089, USA;
| | - Xingxin Pan
- Department of Oncology, Livestrong Cancer Institutes, Dell Medical School, The University of Texas at Austin, Austin, TX 78712, USA;
| | - Lishuang Feng
- School of Public Health, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong, China; (Q.S.); (L.F.)
| | - Ying Ding
- College of Life Sciences, University of Chinese Academy of Sciences, Beijing 100049, China; (X.L.); (Y.D.)
| | - Shiyou Wei
- Department of Thoracic Surgery, West China Hospital, Sichuan University, Chengdu 610041, China
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3
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Sun Y, Das S, Brown SR, Blevins ER, Qu F, Ward NA, Gregory SA, Boudreaux CM, Kim Y, Papish ET. Ruthenium pincer complexes for light activated toxicity: Lipophilic groups enhance toxicity. J Inorg Biochem 2023; 240:112110. [PMID: 36596265 PMCID: PMC10231263 DOI: 10.1016/j.jinorgbio.2022.112110] [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: 07/20/2022] [Revised: 12/08/2022] [Accepted: 12/17/2022] [Indexed: 12/24/2022]
Abstract
Nine ruthenium CNC pincer complexes (1-9) were tested for anticancer activity in cell culture under both dark and light conditions. These complexes included varied CNC pincer ligands including OH, OMe, or Me substituents on the pyridyl ring and wingtip N-heterocyclic carbene (NHC) groups which varied as methyl (Me), phenyl (Ph), mesityl (Mes), and 2,6-diisopropylphenyl (Dipp). The supporting ligands included acetonitrile, Cl, and 2,2'-bipyridine (bpy) donors. The synthesis of complexes 8 and 9 is described herein and are fully characterized by spectroscopic (1H NMR, IR, UV-Vis, MS) and analytical techniques. Single crystal X-ray diffraction results are reported herein for 8 and 9. The other complexes (1-7) are reported elsewhere. The four most lipophilic ruthenium complexes (6, 7, 8, and 9) showed the best activity vs. MCF7 cancer cells with complexes 6 and 9 showing cytotoxicity and complex 7 and 8 showing light activated photocytotoxicity. The distribution of these compounds between octanol and water is reported as log(Do/w) values, and increasing log(Do/w) values correlate roughly with improved activity vs. cancer cells. Overall, lipophilic wingtip groups (e.g. Ph, Mes, Dipp) on the NHC ring and a lower cationic charge (1+ vs. 2+) appears to be beneficial for improved anticancer activity.
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Affiliation(s)
- Yifei Sun
- The University of Alabama, Department of Chemical and Biological Engineering, Tuscaloosa, AL 35487, USA
| | - Sanjit Das
- The University of Alabama, Department of Chemistry and Biochemistry, Tuscaloosa, AL 35487, USA
| | - Spenser R Brown
- The University of Alabama, Department of Chemical and Biological Engineering, Tuscaloosa, AL 35487, USA
| | - Emily R Blevins
- The University of Alabama, Department of Chemistry and Biochemistry, Tuscaloosa, AL 35487, USA
| | - Fengrui Qu
- The University of Alabama, Department of Chemical and Biological Engineering, Tuscaloosa, AL 35487, USA
| | - Nicholas A Ward
- The University of Alabama, Department of Chemistry and Biochemistry, Tuscaloosa, AL 35487, USA
| | - Shawn Aiden Gregory
- The University of Alabama, Department of Chemistry and Biochemistry, Tuscaloosa, AL 35487, USA
| | - Chance M Boudreaux
- The University of Alabama, Department of Chemistry and Biochemistry, Tuscaloosa, AL 35487, USA
| | - Yonghyun Kim
- The University of Alabama, Department of Chemical and Biological Engineering, Tuscaloosa, AL 35487, USA.
| | - Elizabeth T Papish
- The University of Alabama, Department of Chemistry and Biochemistry, Tuscaloosa, AL 35487, USA.
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Alcaniz J, Winkler L, Dahlmann M, Becker M, Orthmann A, Haybaeck J, Krassnig S, Skofler C, Kratzsch T, Kuhn SA, Jödicke A, Linnebacher M, Fichtner I, Walther W, Hoffmann J. Clinically relevant glioblastoma patient-derived xenograft models to guide drug development and identify molecular signatures. Front Oncol 2023; 13:1129627. [PMID: 37114125 PMCID: PMC10126369 DOI: 10.3389/fonc.2023.1129627] [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: 12/22/2022] [Accepted: 03/14/2023] [Indexed: 04/29/2023] Open
Abstract
Glioblastoma (GBM) heterogeneity, aggressiveness and infiltrative growth drastically limit success of current standard of care drugs and efficacy of various new therapeutic approaches. There is a need for new therapies and models reflecting the complex biology of these tumors to analyze the molecular mechanisms of tumor formation and resistance, as well as to identify new therapeutic targets. We established and screened a panel of 26 patient-derived subcutaneous (s.c.) xenograft (PDX) GBM models on immunodeficient mice, of which 15 were also established as orthotopic models. Sensitivity toward a drug panel, selected for their different modes of action, was determined. Best treatment responses were observed for standard of care temozolomide, irinotecan and bevacizumab. Matching orthotopic models frequently show reduced sensitivity, as the blood-brain barrier limits crossing of the drugs to the GBM. Molecular characterization of 23 PDX identified all of them as IDH-wt (R132) with frequent mutations in EGFR, TP53, FAT1, and within the PI3K/Akt/mTOR pathway. Their expression profiles resemble proposed molecular GBM subtypes mesenchymal, proneural and classical, with pronounced clustering for gene sets related to angiogenesis and MAPK signaling. Subsequent gene set enrichment analysis identified hallmark gene sets of hypoxia and mTORC1 signaling as enriched in temozolomide resistant PDX. In models sensitive for mTOR inhibitor everolimus, hypoxia-related gene sets reactive oxygen species pathway and angiogenesis were enriched. Our results highlight how our platform of s.c. GBM PDX can reflect the complex, heterogeneous biology of GBM. Combined with transcriptome analyses, it is a valuable tool in identification of molecular signatures correlating with monitored responses. Available matching orthotopic PDX models can be used to assess the impact of the tumor microenvironment and blood-brain barrier on efficacy. Our GBM PDX panel therefore represents a valuable platform for screening regarding molecular markers and pharmacologically active drugs, as well as optimizing delivery of active drugs to the tumor.
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Affiliation(s)
- Joshua Alcaniz
- Experimental Pharmacology and Oncology GmbH, Berlin, Germany
- *Correspondence: Joshua Alcaniz,
| | - Lars Winkler
- Experimental Pharmacology and Oncology GmbH, Berlin, Germany
| | | | - Michael Becker
- Experimental Pharmacology and Oncology GmbH, Berlin, Germany
| | - Andrea Orthmann
- Experimental Pharmacology and Oncology GmbH, Berlin, Germany
| | - Johannes Haybaeck
- Department of Neuropathology, Diagnostic & Research Center for Molecular BioMedicine, Institute of Pathology, Medical University of Graz, Graz, Austria
- Center for Biomarker Research in Medicine, Graz, Austria
- Institute of Pathology, Neuropathology, and Molecular Pathology, Medical University of Innsbruck, Innsbruck, Austria
| | - Stefanie Krassnig
- Department of Neuropathology, Diagnostic & Research Center for Molecular BioMedicine, Institute of Pathology, Medical University of Graz, Graz, Austria
| | | | - Tobias Kratzsch
- Department of Neurosurgery, Charité Universitätsmedizin, Berlin, Germany
| | - Susanne A. Kuhn
- Department of Neurosurgery, Ernst von Bergmann Hospital, Potsdam, Germany
| | - Andreas Jödicke
- Department of Neurosurgery, Vivantes Hospital Berlin Neukölln, Berlin, Germany
| | - Michael Linnebacher
- Department of Surgery, Molecular Oncology and Immunotherapy, University Medical Center Rostock, Rostock, Germany
| | - Iduna Fichtner
- Experimental Pharmacology and Oncology GmbH, Berlin, Germany
| | - Wolfgang Walther
- Experimental Pharmacology and Oncology GmbH, Berlin, Germany
- Max Delbrück Center for Molecular Medicine, Berlin, Germany
- Experimental and Clinical Research Center, Charité Universitätsmedizin, Berlin, Germany
| | - Jens Hoffmann
- Experimental Pharmacology and Oncology GmbH, Berlin, Germany
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Magrath JW, Kang HJ, Hartono A, Espinosa-Cotton M, Somwar R, Ladanyi M, Cheung NKV, Lee SB. Desmoplastic small round cell tumor cancer stem cell-like cells resist chemotherapy but remain dependent on the EWSR1-WT1 oncoprotein. Front Cell Dev Biol 2022; 10:1048709. [PMID: 36506091 PMCID: PMC9732033 DOI: 10.3389/fcell.2022.1048709] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2022] [Accepted: 11/08/2022] [Indexed: 11/26/2022] Open
Abstract
Desmoplastic Small Round Cell Tumor (DSRCT) is a rare and aggressive pediatric cancer driven by the EWSR1-WT1 fusion oncogene. Combinations of chemotherapy, radiation and surgery are not curative, and the 5-years survival rate is less than 25%. One potential explanation for refractoriness is the existence of a cancer stem cell (CSC) subpopulation able escape current treatment modalities. However, no study to-date has examined the role of CSCs in DSRCT or established in vitro culture conditions to model this subpopulation. In this study, we investigated the role of stemness markers in DSRCT survival and metastasis, finding that elevated levels of SOX2 and NANOG are associated with worse survival in sarcoma patients and are elevated in metastatic DSRCT tumors. We further develop the first in vitro DSRCT CSC model which forms tumorspheres, expresses increased levels of stemness markers (SOX2, NANOG, KLF4, and OCT4), and resists doxorubicin chemotherapy treatment. This model is an important addition to the DSRCT tool kit and will enable investigation of this critical DSRCT subpopulation. Despite lower sensitivity to chemotherapy, the DSRCT CSC model remained sensitive to knockdown of the EWSR1-WT1 fusion protein, suggesting that future therapies directed against this oncogenic driver have the potential to treat both DSRCT bulk tumor and CSCs.
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Affiliation(s)
- Justin W. Magrath
- Department of Pathology and Laboratory Medicine, Tulane University School of Medicine, New Orleans, LA, United States
| | - Hong-Jun Kang
- Department of Pathology and Laboratory Medicine, Tulane University School of Medicine, New Orleans, LA, United States
| | - Alifiani Hartono
- Department of Pathology and Laboratory Medicine, Tulane University School of Medicine, New Orleans, LA, United States
| | - Madelyn Espinosa-Cotton
- Department of Pediatrics, Memorial Sloan Kettering Cancer Center, New York, NY, United States
| | - Romel Somwar
- Department of Pathology and Laboratory Medicine, Memorial Sloan Kettering Cancer Center, New York, NY, United States
| | - Marc Ladanyi
- Department of Pathology and Laboratory Medicine, Memorial Sloan Kettering Cancer Center, New York, NY, United States
| | - Nai-Kong V. Cheung
- Department of Pediatrics, Memorial Sloan Kettering Cancer Center, New York, NY, United States
| | - Sean B. Lee
- Department of Pathology and Laboratory Medicine, Tulane University School of Medicine, New Orleans, LA, United States
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6
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Asik A, Ay NPO, Bagca BG, Caglar HO, Gunduz C, Avci CB. Combination of Salinomycin and AZD3463 Reveals Synergistic Effect on Reducing the Viability of T98G Glioblastoma Cells. Anticancer Agents Med Chem 2021; 20:2267-2273. [PMID: 32698744 DOI: 10.2174/1871520620666200721121517] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2020] [Revised: 06/19/2020] [Accepted: 06/23/2020] [Indexed: 02/07/2023]
Abstract
BACKGROUND Salinomycin, an ionophore antibiotic, is known to be an effective agent in reducing the viability of Glioblastoma (GBM) cells. The combination of salinomycin with other chemotherapeutic drugs would help to overcome the drug resistance of GBM cells. OBJECTIVE This study aims to test the combinatorial effect of salinomycin and AZD3463 in T98G GBM cells. METHODS The cytotoxic effects of drugs on T98G GBM cells were determined by using WST-8 assay. Flow cytometry was used to identify apoptosis and cell cycle profiles after treatments. Real-time PCR was used to portray mRNA expression profiles of genes in the Wnt-signaling pathway after treatments. RESULTS IC50 concentrations of AZD3463 and salinomycin were 529nM and 7.3μM for 48h, respectively. The combination concentrations of AZD3463 and salinomycin were 3.3μM and 333nM, respectively. The combination treatment showed a synergistic effect on reducing the viability of GBM cells. AZD3463, salinomycin, and their combination induced apoptosis in 1.2, 1.4, and 3.2 folds, respectively. AZD3463 and the combination treatment induced the cell cycle arrest at the G1 phase. Salinomycin and AZD3463 treatments, either alone or in combination, resulted in the downregulation or upregulation of mRNA expression levels of genes in the Wntsignaling pathway. CONCLUSION Salinomycin, AZD3463, and their combination may inhibit proliferation and induce apoptosis in GBM cells due to a decrease in expression levels of genes acting in both the canonical and non-canonical Wnt signaling pathways. The Wnt signaling pathway may be involved in salinomycin-AZD3463 drug interaction.
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Affiliation(s)
- Aycan Asik
- Department of Medical Biology, Medical Faculty, Ege University, Bornova, 35100, Izmir, Turkey
| | - Neslihan P O Ay
- Department of Medical Biology, Medical Faculty, Ege University, Bornova, 35100, Izmir, Turkey
| | - Bakiye G Bagca
- Department of Medical Biology, Medical Faculty, Ege University, Bornova, 35100, Izmir, Turkey
| | - Hasan O Caglar
- Department of Stem Cell, Health Science Institute, Ege University, Bornova, 35100, Izmir, Turkey
| | - Cumhur Gunduz
- Department of Medical Biology, Medical Faculty, Ege University, Bornova, 35100, Izmir, Turkey
| | - Cigir B Avci
- Department of Medical Biology, Medical Faculty, Ege University, Bornova, 35100, Izmir, Turkey
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7
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Wang L, Liu C, Qiao F, Li M, Xin H, Chen N, Wu Y, Liu J. Analysis of the cytotoxic effects, cellular uptake and cellular distribution of paclitaxel-loaded nanoparticles in glioblastoma cells in vitro. Exp Ther Med 2021; 21:292. [PMID: 33717235 PMCID: PMC7885080 DOI: 10.3892/etm.2021.9723] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2019] [Accepted: 09/18/2020] [Indexed: 12/21/2022] Open
Abstract
Glioblastoma is the most common and aggressive type of brain tumor. Although treatments for glioblastoma have been improved recently, patients still suffer from local recurrence in addition to poor prognosis. Previous studies have indicated that the efficacy of chemotherapeutic or bioactive agents is severely compromised by the blood-brain barrier and the inherent drug resistance of glioblastoma. The present study developed a delivery system to improve the efficiency of delivering therapeutic agents into glioblastoma cells. The anticancer drug paclitaxel (PTX) was packed into nanoparticles that were composed of amphiphilic poly (γ-glutamic-acid-maleimide-co-L-lactide)-1,2-dipalmitoylsn-glycero-3-phosphoethanolaminecopolymer conjugated with targeting moiety transferrin (Tf). The Tf nanoparticles (Tf-NPs) may enter glioblastoma cells via transferrin receptor-mediated endocytosis. MTT assay and flow cytometry were used to explore the cytotoxic effects, cellular uptake and cellular distribution of paclitaxel-loaded nanoparticles. The results indicated that both PTX and PTX-Tf-NPs inhibited the viability of rat glioblastoma C6 cells in a dose-dependent manner, but the PTX-Tf-NPs exhibited a greater inhibitory effect compared with PTX, even at higher concentrations (0.4, 2 and 10 µg/ml). However, both PTX and PTX-Tf-NPs exhibited a reduced inhibitory effect on the viability of mouse hippocampal neuronal HT22 cells compared with that on C6 cells. Additionally, in contrast to PTX alone, PTX-Tf-NPs treatment of C6 cells at lower concentrations (0.0032, 0.0160 and 0.0800 µg/ml) induced increased G2/M arrest, although this difference did not occur at a higher drug concentration (0.4 µg/ml). It was observed that FITC-labeled PTX-Tf-NPs were endocytosed by C6 cells within 4 h. Furthermore, FITC-labeled PTX-Tf-NPs or Tf-NPs co-localized with a lysosomal tracker, Lysotracker Red DND-99. These results of the present study indicated that Tf-NPs enhanced the cytotoxicity of PTX in glioblastoma C6 cells, suggesting that PTX-Tf-NPs should be further explored in animal models of glioblastoma.
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Affiliation(s)
- Lin Wang
- Clinical Laboratory, The First Affiliated Hospital of Jiamusi University, Jiamusi, Heilongjiang 154003, P.R. China
| | - Chunhui Liu
- Clinical Laboratory, The First Affiliated Hospital of Jiamusi University, Jiamusi, Heilongjiang 154003, P.R. China
| | - Feng Qiao
- Clinical Laboratory, The First Affiliated Hospital of Jiamusi University, Jiamusi, Heilongjiang 154003, P.R. China
| | - Mingjun Li
- Clinical Laboratory, The First Affiliated Hospital of Jiamusi University, Jiamusi, Heilongjiang 154003, P.R. China
| | - Hua Xin
- Clinical Laboratory, The First Affiliated Hospital of Jiamusi University, Jiamusi, Heilongjiang 154003, P.R. China
| | - Naifeng Chen
- Department of Pathology and Physiology, School of Basic Medical Sciences of Jiamusi University, Jiamusi, Heilongjiang 154007, P.R. China
| | - Yan Wu
- Division of Nanomedicine and Nanobiology, National Center for Nanoscience and Technology, Beijing 100190, P.R. China
| | - Junxing Liu
- Department of Pathology and Physiology, School of Basic Medical Sciences of Jiamusi University, Jiamusi, Heilongjiang 154007, P.R. China
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8
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Salinomycin-Loaded Iron Oxide Nanoparticles for Glioblastoma Therapy. NANOMATERIALS 2020; 10:nano10030477. [PMID: 32155938 PMCID: PMC7153627 DOI: 10.3390/nano10030477] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/21/2020] [Revised: 02/26/2020] [Accepted: 03/03/2020] [Indexed: 12/11/2022]
Abstract
Salinomycin is an antibiotic introduced recently as a new and effective anticancer drug. In this study, magnetic iron oxide nanoparticles (IONPs) were utilized as a drug carrier for salinomycin for potential use in glioblastoma (GBM) chemotherapy. The biocompatible polyethylenimine (PEI)-polyethylene glycol (PEG)-IONPs (PEI-PEG-IONPs) exhibited an efficient uptake in both mouse brain-derived microvessel endothelial (bEnd.3) and human U251 GBM cell lines. The salinomycin (Sali)-loaded PEI-PEG-IONPs (Sali-PEI-PEG-IONPs) released salinomycin over 4 days, with an initial release of 44% ± 3% that increased to 66% ± 5% in acidic pH. The Sali-IONPs inhibited U251 cell proliferation and decreased their viability (by approximately 70% within 48 h), and the nanoparticles were found to be effective in reactive oxygen species-mediated GBM cell death. Gene studies revealed significant activation of caspases in U251 cells upon treatment with Sali-IONPs. Furthermore, the upregulation of tumor suppressors (i.e., p53, Rbl2, Gas5) was observed, while TopII, Ku70, CyclinD1, and Wnt1 were concomitantly downregulated. When examined in an in vitro blood–brain barrier (BBB)-GBM co-culture model, Sali-IONPs had limited penetration (1.0% ± 0.08%) through the bEnd.3 monolayer and resulted in 60% viability of U251 cells. However, hyperosmotic disruption coupled with an applied external magnetic field significantly enhanced the permeability of Sali-IONPs across bEnd.3 monolayers (3.2% ± 0.1%) and reduced the viability of U251 cells to 38%. These findings suggest that Sali-IONPs combined with penetration enhancers, such as hyperosmotic mannitol and external magnetic fields, can potentially provide effective and site-specific magnetic targeting for GBM chemotherapy.
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9
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Kaushik V, Yakisich JS, Kumar A, Azad N, Iyer AKV. Ionophores: Potential Use as Anticancer Drugs and Chemosensitizers. Cancers (Basel) 2018; 10:cancers10100360. [PMID: 30262730 PMCID: PMC6211070 DOI: 10.3390/cancers10100360] [Citation(s) in RCA: 50] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2018] [Revised: 09/13/2018] [Accepted: 09/21/2018] [Indexed: 01/08/2023] Open
Abstract
Ion homeostasis is extremely important for the survival of both normal as well as neoplastic cells. The altered ion homeostasis found in cancer cells prompted the investigation of several ionophores as potential anticancer agents. Few ionophores, such as Salinomycin, Nigericin and Obatoclax, have demonstrated potent anticancer activities against cancer stem-like cells that are considered highly resistant to chemotherapy and responsible for tumor relapse. The preclinical success of these compounds in in vitro and in vivo models have not been translated into clinical trials. At present, phase I/II clinical trials demonstrated limited benefit of Obatoclax alone or in combination with other anticancer drugs. However, future development in targeted drug delivery may be useful to improve the efficacy of these compounds. Alternatively, these compounds may be used as leading molecules for the development of less toxic derivatives.
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Affiliation(s)
- Vivek Kaushik
- Department of Pharmaceutical Sciences, School of Pharmacy, Hampton University, Hampton, VA 23668, USA.
| | - Juan Sebastian Yakisich
- Department of Pharmaceutical Sciences, School of Pharmacy, Hampton University, Hampton, VA 23668, USA.
| | - Anil Kumar
- Great Plains Health, North Platte, NE 69101, USA.
| | - Neelam Azad
- Department of Pharmaceutical Sciences, School of Pharmacy, Hampton University, Hampton, VA 23668, USA.
| | - Anand K V Iyer
- Department of Pharmaceutical Sciences, School of Pharmacy, Hampton University, Hampton, VA 23668, USA.
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