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Mohamed MF, Wood SJ, Roy R, Reiser J, Kuzel TM, Shafikhani SH. Pseudomonas aeruginosa ExoT induces G1 cell cycle arrest in melanoma cells. Cell Microbiol 2021; 23:e13339. [PMID: 33821556 PMCID: PMC8277761 DOI: 10.1111/cmi.13339] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2020] [Revised: 03/31/2021] [Accepted: 04/01/2021] [Indexed: 12/19/2022]
Abstract
Recently, we demonstrated that Pseudomonas aeruginosa Exotoxin T (ExoT) employs two distinct mechanisms to induce potent apoptotic cytotoxicity in a variety of cancer cell lines. We further demonstrated that it can significantly reduce tumour growth in an animal model for melanoma. During these studies, we observed that melanoma cells that were transfected with ExoT failed to undergo mitosis, regardless of whether they eventually succumbed to ExoT-induced apoptosis or survived in ExoT's presence. In this report, we sought to investigate ExoT's antiproliferative activity in melanoma. We delivered ExoT into B16 melanoma cells by bacteria (to show necessity) and by transfection (to show sufficiency). Our data indicate that ExoT exerts a potent antiproliferative function in melanoma cells. We show that ExoT causes cell cycle arrest in G1 interphase in melanoma cells by dampening the G1/S checkpoint proteins. Our data demonstrate that both domains of ExoT; (the ADP-ribosyltransferase (ADPRT) domain and the GTPase activating protein (GAP) domain); contribute to ExoT-induced G1 cell cycle arrest in melanoma. Finally, we show that the ADPRT-induced G1 cell cycle arrest in melanoma cells likely involves the Crk adaptor protein. Our data reveal a novel virulence function for ExoT and further highlight the therapeutic potential of ExoT against cancer.
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Affiliation(s)
- Mohamed F. Mohamed
- Department of Medicine/ Division of Hematology/Oncology/Cell Therapy, Rush University Medical Center, Chicago, IL, USA
- Department of Bacteriology, Mycology and Immunology, Faculty of Veterinary Medicine, Beni-Suef University, Egypt
| | - Stephen J. Wood
- Department of Microbial Pathogens and Immunity, Rush University Medical Center, Chicago, IL, USA
| | - Ruchi Roy
- Department of Medicine/ Division of Hematology/Oncology/Cell Therapy, Rush University Medical Center, Chicago, IL, USA
| | - Jochen Reiser
- Department of Medicine/ Division of Hematology/Oncology/Cell Therapy, Rush University Medical Center, Chicago, IL, USA
| | - Timothy M. Kuzel
- Department of Medicine/ Division of Hematology/Oncology/Cell Therapy, Rush University Medical Center, Chicago, IL, USA
| | - Sasha H. Shafikhani
- Department of Medicine/ Division of Hematology/Oncology/Cell Therapy, Rush University Medical Center, Chicago, IL, USA
- Department of Microbial Pathogens and Immunity, Rush University Medical Center, Chicago, IL, USA
- Cancer Center, Rush University Medical Center, Chicago, IL, USA
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Liu Y, Long T, Zhang N, Qiao B, Yang Q, Luo Y, Cao J, Luo J, Yuan D, Sun Y, Li Y, Yang Z, Wang ZG. Ultrasound-Mediated Long-Circulating Nanopolymer Delivery of Therapeutic siRNA and Antisense MicroRNAs Leads to Enhanced Paclitaxel Sensitivity in Epithelial Ovarian Cancer Chemotherapy. ACS Biomater Sci Eng 2020; 6:4036-4050. [PMID: 33463352 DOI: 10.1021/acsbiomaterials.0c00330] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Epithelial ovarian cancer (EOC) is one of the leading malignant tumors that seriously threaten women's health. The development of new drugs or increasing the sensitivities of current chemotherapy drugs is critically needed. The purpose of this study was to assess the synergistic effects of two silencing RNAs [salt-inducible kinase 2 (SIK2) siRNA and antisense-microRNA21 (anti-miR21)] encapsulated in long-circulating folate-lipid-poly(lactic-co-glycolic acid) (PLGA) hybrid nanopolymers (FaLPHNPs) administered using an ultrasound- and microbubble (US-MB)-mediated approach to sensitize human EOC xenografts to paclitaxel (PTX). In the in vitro assays, this lipid-PLGA hybrid nanopolymer exhibited an extended circulation profile (t1/2: ∼8.5 h); US-MB-mediated complementary delivery of FaLPHNPs resulted in a significant reduction in EOC cell (OVCR3, A2780, and SKOV3) proliferation. In vivo, there was a 2.5-fold increase (p < 0.05) in RNA delivery in EOC xenografts, which resulted in a notable inhibition of tumor growth compared with that in the non-ultrasound-mediated and PTX alone-treated controls. We validated the therapeutic roles of SIK2, the target gene in treating advanced ovarian cancer, and anti-miR21 by evaluating the significant inhibition of tumor growth upon SIK2 silencing and inhibition of endogenous miR21 function. In summary, the results of this study revealed that US-MB-mediated codelivery of SIK2 siRNA, and anti-miR21 encapsulated in a folate-lipid-PLGA hybrid polymer nanoparticle could significantly improve the sensitivity of EOC tumors to PTX and is a highly effective approach for treating EOC in complementary experiments. Further research of this strategy could lead to better treatment results for patients with EOC.
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Affiliation(s)
- Yi Liu
- Department of Gynecology and Obstetrics, The Second Affiliated Hospital of Chongqing Medical University, Chongqing 400010, China.,Institute of Ultrasound Imaging, The Second Affiliated Hospital of Chongqing Medical University, Chongqing 400010, China
| | - Tengfei Long
- Department of Gynecology and Obstetrics, The Second Affiliated Hospital of Chongqing Medical University, Chongqing 400010, China.,Institute of Ultrasound Imaging, The Second Affiliated Hospital of Chongqing Medical University, Chongqing 400010, China
| | - Ni Zhang
- Institute of Ultrasound Imaging, The Second Affiliated Hospital of Chongqing Medical University, Chongqing 400010, China.,Department of Oncology, The Second Affiliated Hospital of Chongqing Medical University, Chongqing 400010, China
| | - Bin Qiao
- Institute of Ultrasound Imaging, The Second Affiliated Hospital of Chongqing Medical University, Chongqing 400010, China
| | - Qiang Yang
- Institute of Ultrasound Imaging, The Second Affiliated Hospital of Chongqing Medical University, Chongqing 400010, China.,Department of Neurosurgery, The Second Affiliated Hospital of Chongqing Medical University, Chongqing 400010, China
| | - Yuanli Luo
- Institute of Ultrasound Imaging, The Second Affiliated Hospital of Chongqing Medical University, Chongqing 400010, China
| | - Jin Cao
- Institute of Ultrasound Imaging, The Second Affiliated Hospital of Chongqing Medical University, Chongqing 400010, China
| | - Jing Luo
- Department of Pathology, Chongqing Medical University, Chongqing 400010, China
| | - Dong Yuan
- Department of Gynecology and Obstetrics, The Second Affiliated Hospital of Chongqing Medical University, Chongqing 400010, China
| | - Yixuan Sun
- Department of Gynecology and Obstetrics, The Second Affiliated Hospital of Chongqing Medical University, Chongqing 400010, China
| | - Yanxi Li
- Department of Reproductive Medicine Center, Daping Hospital, Army Medical University (Third Military Medical University), Chongqing 400042, China
| | - Zhu Yang
- Department of Gynecology and Obstetrics, The Second Affiliated Hospital of Chongqing Medical University, Chongqing 400010, China
| | - Z G Wang
- Institute of Ultrasound Imaging, The Second Affiliated Hospital of Chongqing Medical University, Chongqing 400010, China
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Rwei P, Alex Gong CS, Luo LJ, Lin MB, Lai JY, Liu HL. In vitro investigation of ultrasound-induced oxidative stress on human lens epithelial cells. Biochem Biophys Res Commun 2017; 482:954-960. [DOI: 10.1016/j.bbrc.2016.11.139] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2016] [Accepted: 11/25/2016] [Indexed: 12/12/2022]
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Goldufsky J, Wood S, Hajihossainlou B, Rehman T, Majdobeh O, Kaufman HL, Ruby CE, Shafikhani SH. Pseudomonas aeruginosa exotoxin T induces potent cytotoxicity against a variety of murine and human cancer cell lines. J Med Microbiol 2015; 64:164-73. [PMID: 25627204 DOI: 10.1099/jmm.0.000003-0] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023] Open
Abstract
In patients with malignancy, the major barrier to achieving complete response is emergence of resistance to current chemotherapeutic agents. One of the major mechanisms by which tumour cells become resistant to therapies is by altering cellular drug targets through mutations and/or deletions. Resistance by this mechanism is achieved more easily if the drug has limited cellular targets and/or processes. We hypothesized that as Pseudomonas aeruginosa exotoxin T (ExoT) targets six proteins that are required for cancer cell survival and proliferation, it is highly unlikely for cancer cells to develop resistance to this toxin. We assessed ExoT's cytotoxicity against multiple invasive and highly resistant tumour cell lines in order to evaluate its potential as a chemotherapeutic agent. Our data demonstrated that ExoT induced potent cytotoxicity in all tumour cell lines that we examined. Collectively, our data highlighted the potential of ExoT as a possible chemotherapeutic candidate for the treatment of cancer.
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Affiliation(s)
- Joe Goldufsky
- Department of Immunology/Microbiology, Rush University Medical Center, Chicago, IL, USA
| | - Stephen Wood
- Department of Immunology/Microbiology, Rush University Medical Center, Chicago, IL, USA
| | - Behnam Hajihossainlou
- Department of Immunology/Microbiology, Rush University Medical Center, Chicago, IL, USA
| | - Tooba Rehman
- Department of Immunology/Microbiology, Rush University Medical Center, Chicago, IL, USA
| | - Omar Majdobeh
- Department of Immunology/Microbiology, Rush University Medical Center, Chicago, IL, USA
| | | | - Carl E Ruby
- Department of Surgery, Rush University Medical Center, Chicago, IL, USA Sarepta Therapeutics, Corvallis, OR, USA
| | - Sasha H Shafikhani
- Department of Immunology/Microbiology, Rush University Medical Center, Chicago, IL, USA Rush University Cancer Center, Rush University Medical Center, Chicago, IL, USA
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Goldufsky J, Wood S, Hajihossainlou B, Rehman T, Majdobeh O, Kaufman HL, Ruby CE, Shafikhani SH. Pseudomonas aeruginosa exotoxin T induces potent cytotoxicity against a variety of murine and human cancer cell lines. J Med Microbiol 2015. [DOI: 10.1099/jmm.0.000003] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Affiliation(s)
- Joe Goldufsky
- Department of Immunology/Microbiology, Rush University Medical Center, Chicago, IL, USA
| | - Stephen Wood
- Department of Immunology/Microbiology, Rush University Medical Center, Chicago, IL, USA
| | - Behnam Hajihossainlou
- Department of Immunology/Microbiology, Rush University Medical Center, Chicago, IL, USA
| | - Tooba Rehman
- Department of Immunology/Microbiology, Rush University Medical Center, Chicago, IL, USA
| | - Omar Majdobeh
- Department of Immunology/Microbiology, Rush University Medical Center, Chicago, IL, USA
| | | | - Carl E. Ruby
- Sarepta Therapeutics, Corvallis, OR, USA
- Department of Surgery, Rush University Medical Center, Chicago, IL, USA
| | - Sasha H. Shafikhani
- Rush University Cancer Center, Rush University Medical Center, Chicago, IL, USA
- Department of Immunology/Microbiology, Rush University Medical Center, Chicago, IL, USA
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Wang J, Wang J, Cai C, Wang S, Liu S, Shi S, Zhang Y, Li B. Feasibility of using a dual-promoter recombinant baculovirus vector to coexpress EGFP and GDNF in mammalian cells. Exp Ther Med 2014; 7:1549-1554. [PMID: 24926342 PMCID: PMC4043573 DOI: 10.3892/etm.2014.1655] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2013] [Accepted: 03/18/2014] [Indexed: 11/06/2022] Open
Abstract
Vectors that are capable of coexpressing two or more exogenous genes for in vitro and in vivo gene delivery are being increasingly studied. The aim of the present study was to explore the feasibility of using the pFastBac™ Dual vector, under the control of two cytomegalovirus (CMV) promoters with opposite directions, to coexpress enhanced green fluorescent protein (EGFP) and glial cell line-derived neurotrophic factor (GDNF) in the same mammalian cell. In the study, two promoters in the pFastBac Dual vector were replaced with CMV-EGFP and CMV-GDNF, whose directions were consistent with the initial directions. The pFastBac Dual-CMV-EGFP-CMV-GDNF plasmid was constructed and then transfected into human embryonic kidney (HEK) 293T cells. The recombinant virus, Bac Dual-CMV-EGFP-CMV-GDNF, was generated with the Bac-to-Bac Baculovirus Expression system and used to transduce HeLa cells. Immunofluorescence was applied to examine the coexpression of EGFP and GDNF in transfected or transduced mammalian cells, while western blot analysis was used to confirm the expression of GDNF in transduced HeLa cells. The recombinant plasmid was constructed and the recombinant baculovirus was successfully generated. Immunofluorescence observations demonstrated that EGFP and GDNF were simultaneously expressed in the same transfected HEK 293T cell and in a single transduced HeLa cell. Western blot analysis revealed that GDNF was expressed accurately in the transduced cells. Therefore, the pFastBac Dual vector is an efficient gene transfer vector that is able to coexpress two target proteins in mammalian cells and serve as a platform for combining reporter or/and therapy genes used in molecular imaging and dual-gene therapy. Thus, the current study presents a new coexpression strategy for dual-gene delivery in vitro and in vivo.
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Affiliation(s)
- Jianzhang Wang
- Department of Otolaryngology, Rui Jin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200025, P.R. China
| | - Jun Wang
- Department of Otolaryngology, Rui Jin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200025, P.R. China
| | - Changping Cai
- Department of Otolaryngology, Rui Jin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200025, P.R. China
| | - Shili Wang
- Department of Otolaryngology, Rui Jin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200025, P.R. China
| | - Shuai Liu
- Department of Nuclear Medicine, Rui Jin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200025, P.R. China
| | - Shuo Shi
- Department of Nuclear Medicine, Rui Jin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200025, P.R. China
| | - Yifan Zhang
- Department of Nuclear Medicine, Rui Jin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200025, P.R. China
| | - Biao Li
- Department of Nuclear Medicine, Rui Jin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200025, P.R. China
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Cui K, Yan T, Luo Q, Zheng Y, Liu X, Huang X, Zou L. Ultrasound microbubble-mediated delivery of integrin-linked kinase gene improves endothelial progenitor cells dysfunction in pre-eclampsia. DNA Cell Biol 2014; 33:301-10. [PMID: 24564279 DOI: 10.1089/dna.2013.2229] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023] Open
Abstract
Pre-eclampsia (PE) is a specific vascular complication in pregnancy whose precise mechanism is still unclear. We hypothesized that endothelial progenitor cells (EPCs), the precursor of endothelial cells, might be impaired in patients with PE and hold a great promise for the treatment of PE. In the present study, we analyzed the EPCs number and expression of integrin-linked kinase (ILK) in PE patients. We confirmed that both EPCs number and ILK expression were diminished in PE patients. Next, we transfected EPCs with ILK gene using ultrasonic microbubble technique (UMT) for the first time, as UMT is a novel type of gene transfer technology showing promising applications in stem cells apart from EPCs. To further investigate the transfection efficiency of UMT, RT-PCR analysis and western blot were used to examine the messenger RNA (mRNA) and protein level of ILK. After transfection of the ILK gene, EPCs function was tested to illustrate the role of ILK in cell proliferation, apoptosis, migration, and secretion. The results of the in vitro study suggested that UMT, a novel gene delivery system, could be considered a potent physical method for EPCs transfection. Moreover, the growth and angiogenetic properties of EPCs are enhanced by introducing ILK. This study may afford a new trend for EPCs transfection and gene therapy in PE.
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Affiliation(s)
- Kai Cui
- 1 Department of Obstetrics and Gynecology, Union Hospital, Huazhong University of Science and Technology , Wuhan, China
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