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Mehryab F, Rabbani S, Shekari F, Nazari A, Goshtasbi N, Haeri A. Sirolimus-loaded exosomes as a promising vascular delivery system for the prevention of post-angioplasty restenosis. Drug Deliv Transl Res 2024; 14:158-176. [PMID: 37518365 DOI: 10.1007/s13346-023-01390-z] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 07/11/2023] [Indexed: 08/01/2023]
Abstract
Restenosis remains the main reason for treatment failure of arterial disease. Sirolimus (SIR) as a potent anti-proliferative agent is believed to prevent the phenomenon. The application of exosomes provides an extended-release delivery platform for SIR intramural administration. Herein, SIR was loaded into fibroblast-derived exosomes isolated by ultracentrifugation. Different parameters affecting drug loading were optimized, and exosome samples were characterized regarding physicochemical, pharmaceutical, and biological properties. Cytotoxicity, scratch wound assays, and quantitative real-time PCR for inflammation- and migration-associated genes were performed. Restenosis was induced by carotid injury in a rat carotid model and then exosomes were locally administered. After 14 days, animals were investigated by computed tomography (CT) angiography, morphometric, and immunohistochemical analyses. Western blotting confirmed the presence of specific protein markers in exosomes. Characterization of empty and SIR-loaded exosomes verified round and nanoscale structure of vesicles. Among prepared formulations, desired entrapment efficiency (EE) of 76% was achieved by protein:drug proportion of 2:1 and simple incubation for 30 min at 37 °C. Also, the optimal formulation released about 30% of the drug content during the first 24 h, followed by a prolonged release for several days. In vitro studies revealed the uptake and functional efficacy of the optimized formulation. In vivo studies revealed that %restenosis was in the following order: saline > empty exosomes > SIR-loaded exosomes. Furthermore, Ki67, alpha smooth muscle actin (α-SMA), and matrix metalloproteinase (MMP) markers were less expressed in the SIR-exosomes-treated arteries. These findings confirmed that exosomal SIR could be a hopeful strategy for the prevention of restenosis.
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Affiliation(s)
- Fatemeh Mehryab
- Department of Pharmaceutics and Pharmaceutical Nanotechnology, School of Pharmacy, Shahid Beheshti University of Medical Sciences, PO Box: 14155-6153, Tehran, Iran
| | - Shahram Rabbani
- Research Center for Advanced Technologies in Cardiovascular Medicine, Cardiovascular Diseases Research Institute, Tehran University of Medical Sciences, Tehran, Iran
| | - Faezeh Shekari
- Department of Stem Cells and Developmental Biology, Cell Science Research Center, Royan Institute for Stem Cell Biology and Technology, ACECR, Tehran, Iran
| | - Abdoreza Nazari
- Department of Stem Cells and Developmental Biology, Cell Science Research Center, Royan Institute for Stem Cell Biology and Technology, ACECR, Tehran, Iran
| | - Nazanin Goshtasbi
- Department of Pharmaceutics and Pharmaceutical Nanotechnology, School of Pharmacy, Shahid Beheshti University of Medical Sciences, PO Box: 14155-6153, Tehran, Iran
| | - Azadeh Haeri
- Department of Pharmaceutics and Pharmaceutical Nanotechnology, School of Pharmacy, Shahid Beheshti University of Medical Sciences, PO Box: 14155-6153, Tehran, Iran.
- Protein Technology Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
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Mohanta M, Ramdhun Y, Thirugnanam A, Gupta R, Verma D, Deepak T, Babu AR. Biodegradable AZ91 magnesium alloy/sirolimus/poly D, L-lactic-co-glycolic acid-based substrate for cardiovascular device application. J Biomed Mater Res B Appl Biomater 2024; 112:e35350. [PMID: 37966681 DOI: 10.1002/jbm.b.35350] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2023] [Revised: 09/26/2023] [Accepted: 10/30/2023] [Indexed: 11/16/2023]
Abstract
Biodegradable drug-eluting stents (DESs) are gaining importance owing to their attractive features, such as complete drug release to the target site. Magnesium (Mg) alloys are promising materials for future biodegradable DESs. However, there are few explorations using biodegradable Mg for cardiovascular stent application. In this present study, sirolimus-loaded poly D, L-lactic-co-glycolic acid (PLGA)-coated/ sirolimus-fixed/AZ91 Mg alloy-based substrate was developed via a layer-by-layer approach for cardiovascular stent application. The AZ91 Mg alloy was prepared through the squeeze casting technique. The casted AZ91 Mg alloy (Mg) was alkali-treated to provide macroporous networks to hold the sirolimus and PLGA layers. The systematic characterization was investigated via electrochemical, optical, physicochemical, and in-vitro biological characteristics. The presence of the Mg17 Al12 phase in the Mg sample was found in the x-ray diffraction system (XRD) spectrum which influences the corrosion behavior of the developed substrate. The alkali treatment increases the substrate's hydrophilicity which was confirmed through static contact angle measurement. The anti-corrosion characteristic of casted-AZ91 Mg alloy (Mg) was slightly less than the sirolimus-loaded PLGA-coated alkali-treated AZ91 Mg alloy (Mg/Na/S/P) substrate. However, dissolution rates for both substrates were found to be controlled at cell culture conditions. Radiographic densities of AZ91 Mg alloy substrates (Mg, Mg/Na, and Mg/Na/S/P) were measured to be 0.795 ± 0.015, 0.742 ± 0.01, and 0.712 ± 0.017, respectively. The star-shaped structure of 12% sirolimus/PLGA ensures the bioavailability of the drugs. Sirolimus release kinetic was fitted up to 80% with the "Higuchi model" for Mg samples, whereas Mg/Na/S/P showed 45% fitting with a zero-order mechanism. The Mg/Na/S/P substrate showed a 70% antithrombotic effect compared to control. Further, alkali treatment enhances the antibacterial characteristic of AZ91 Mg alloy. Also, the alkali-treated sirolimus-loaded substrates (Mg/Na/S and Mg/Na/S/P) inhibit the valvular interstitial cell's growth significantly in in-vitro. Hence, the results imply that sirolimus-loaded PLGA-coated AZ91 Mg alloy-based substrate can be a potential candidate for cardiovascular stent application.
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Affiliation(s)
- Monalisha Mohanta
- Department of Biotechnology and Medical Engineering, National Institute of Technology Rourkela, Rourkela, Odisha, India
| | - Yugesh Ramdhun
- Department of Biotechnology and Medical Engineering, National Institute of Technology Rourkela, Rourkela, Odisha, India
| | - Arunachalam Thirugnanam
- Department of Biotechnology and Medical Engineering, National Institute of Technology Rourkela, Rourkela, Odisha, India
| | - Ritvesh Gupta
- Department of Biotechnology and Medical Engineering, National Institute of Technology Rourkela, Rourkela, Odisha, India
| | - Devendra Verma
- Department of Biotechnology and Medical Engineering, National Institute of Technology Rourkela, Rourkela, Odisha, India
| | - Thirumalai Deepak
- Department of Biotechnology and Medical Engineering, National Institute of Technology Rourkela, Rourkela, Odisha, India
| | - Anju R Babu
- Department of Biotechnology and Medical Engineering, National Institute of Technology Rourkela, Rourkela, Odisha, India
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Wang YJ, Valotteau C, Aimard A, Villanueva L, Kostrz D, Follenfant M, Strick T, Chames P, Rico F, Gosse C, Limozin L. Combining DNA scaffolds and acoustic force spectroscopy to characterize individual protein bonds. Biophys J 2023; 122:2518-2530. [PMID: 37290437 PMCID: PMC10323022 DOI: 10.1016/j.bpj.2023.05.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2022] [Revised: 12/13/2022] [Accepted: 05/03/2023] [Indexed: 06/10/2023] Open
Abstract
Single-molecule data are of great significance in biology, chemistry, and medicine. However, new experimental tools to characterize, in a multiplexed manner, protein bond rupture under force are still needed. Acoustic force spectroscopy is an emerging manipulation technique which generates acoustic waves to apply force in parallel on multiple microbeads tethered to a surface. We here exploit this configuration in combination with the recently developed modular junctured-DNA scaffold that has been designed to study protein-protein interactions at the single-molecule level. By applying repetitive constant force steps on the FKBP12-rapamycin-FRB complex, we measure its unbinding kinetics under force at the single-bond level. Special efforts are made in analyzing the data to identify potential pitfalls. We propose a calibration method allowing in situ force determination during the course of the unbinding measurement. We compare our results with well-established techniques, such as magnetic tweezers, to ensure their accuracy. We also apply our strategy to study the force-dependent rupture of a single-domain antibody with its antigen. Overall, we get a good agreement with the published parameters that have been obtained at zero force and population level. Thus, our technique offers single-molecule precision for multiplexed measurements of interactions of biotechnological and medical interest.
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Affiliation(s)
- Yong Jian Wang
- Aix-Marseille Université, CNRS, INSERM, Laboratoire Adhesion et Inflammation, Turing Centre for Living systems, Marseille, France.
| | - Claire Valotteau
- Aix-Marseille Université, CNRS, INSERM, Laboratoire Adhesion et Inflammation, Turing Centre for Living systems, Marseille, France
| | - Adrien Aimard
- Aix-Marseille Université, CNRS, INSERM, Institut Paoli-Calmettes, Centre de Recherche en Cancerologie de Marseille, Marseille, France
| | - Lorenzo Villanueva
- Aix-Marseille Université, CNRS, INSERM, Laboratoire Adhesion et Inflammation, Turing Centre for Living systems, Marseille, France
| | - Dorota Kostrz
- Institut de Biologie de l'Ecole Normale Supérieure, ENS, CNRS, INSERM, PSL Research University, Paris, France
| | - Maryne Follenfant
- Institut de Biologie de l'Ecole Normale Supérieure, ENS, CNRS, INSERM, PSL Research University, Paris, France
| | - Terence Strick
- Institut de Biologie de l'Ecole Normale Supérieure, ENS, CNRS, INSERM, PSL Research University, Paris, France
| | - Patrick Chames
- Aix-Marseille Université, CNRS, INSERM, Institut Paoli-Calmettes, Centre de Recherche en Cancerologie de Marseille, Marseille, France
| | - Felix Rico
- Aix-Marseille Université, CNRS, INSERM, Laboratoire Adhesion et Inflammation, Turing Centre for Living systems, Marseille, France
| | - Charlie Gosse
- Institut de Biologie de l'Ecole Normale Supérieure, ENS, CNRS, INSERM, PSL Research University, Paris, France.
| | - Laurent Limozin
- Aix-Marseille Université, CNRS, INSERM, Laboratoire Adhesion et Inflammation, Turing Centre for Living systems, Marseille, France.
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Kim SB, Furuta T, Kamiya G, Kitada N, Paulmurugan R, Maki SA. Bright Molecular Strain Probe Templates for Reporting Protein-Protein Interactions. Sensors (Basel) 2023; 23:3498. [PMID: 37050557 PMCID: PMC10098686 DOI: 10.3390/s23073498] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/28/2023] [Revised: 03/20/2023] [Accepted: 03/22/2023] [Indexed: 06/19/2023]
Abstract
Imaging protein-protein interactions (PPIs) is a hot topic in molecular medicine in the postgenomic sequencing era. In the present study, we report bright and highly sensitive single-chain molecular strain probe templates which embed full-length Renilla luciferase 8.6-535SG (RLuc86SG) or Artificial luciferase 49 (ALuc49) as reporters. These reporters were deployed between FKBP-rapamycin binding domain (FRB) and FK506-binding protein (FKBP) as a PPI model. This unique molecular design was conceptualized to exploit molecular strains of the sandwiched reporters appended by rapamycin-triggered intramolecular PPIs. The ligand-sensing properties of the templates were maximized by interface truncations and substrate modulation. The highest fold intensities, 9.4 and 16.6, of the templates were accomplished with RLuc86SG and ALuc49, respectively. The spectra of the templates, according to substrates, revealed that the colors are tunable to blue, green, and yellow. The putative substrate-binding chemistry and the working mechanisms of the probes were computationally modeled in the presence or absence of rapamycin. Considering that the molecular strain probe templates are applicable to other PPI models, the present approach would broaden the scope of the bioassay toolbox, which harnesses the privilege of luciferase reporters and the unique concept of the molecular strain probes into bioassays and molecular imaging.
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Affiliation(s)
- Sung-Bae Kim
- Environmental Management Research Institute (EMRI), National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba 305-8569, Japan
| | - Tadaomi Furuta
- School of Life Science and Technology, Tokyo Institute of Technology, Yokohama 226-8501, Japan
| | - Genta Kamiya
- Department of Engineering Science, Graduate School of Informatics and Engineering, The University of Electro-Communications, Chofu 182-8585, Japan
| | - Nobuo Kitada
- Department of Engineering Science, Graduate School of Informatics and Engineering, The University of Electro-Communications, Chofu 182-8585, Japan
| | - Ramasamy Paulmurugan
- Molecular Imaging Program at Stanford, Bio-X Program, Stanford University School of Medicine, Palo Alto, CA 94304, USA
| | - Shojiro A. Maki
- Department of Engineering Science, Graduate School of Informatics and Engineering, The University of Electro-Communications, Chofu 182-8585, Japan
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5
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Avila H, Yu J, Boddu G, Phan A, Truong A, Peddi S, Guo H, Lee SJ, Alba M, Canfield E, Yamamoto V, Paton JC, Paton AW, Lee AS, MacKay JA. Hydra-Elastin-like Polypeptides Increase Rapamycin Potency When Targeting Cell Surface GRP78. Biomacromolecules 2022; 23:3116-3129. [PMID: 35786858 PMCID: PMC10231879 DOI: 10.1021/acs.biomac.2c00048] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Rapalogues are powerful therapeutic modalities for breast cancer; however, they suffer from low solubility and dose-limiting side effects. To overcome these challenges, we developed a long-circulating multiheaded drug carrier called 5FA, which contains rapamycin-binding domains linked with elastin-like polypeptides (ELPs). To target these "Hydra-ELPs" toward breast cancer, we here linked 5FA with four distinct peptides which are reported to engage the cell surface form of the 78 kDa glucose-regulated protein (csGRP78). To determine if these peptides affected the carrier solubility, this library was characterized by light scattering and mass spectrometry. To guide in vitro selection of the most potent functional carrier for rapamycin, its uptake and inhibition of mTORC1 were monitored in a ductal breast cancer model (BT474). Using flow cytometry to track cellular association, it was found that only the targeted carriers enhanced cellular uptake and were susceptible to proteolysis by SubA, which specifically targets csGRP78. The functional inhibition of mTOR was monitored by Western blot for pS6K, whereby the best carrier L-5FA reduced mTOR activity by 3-fold compared to 5FA or free rapamycin. L-5FA was further visualized using super-resolution confocal laser scanning microscopy, which revealed that targeting increased exposure to the carrier by ∼8-fold. This study demonstrates how peptide ligands for GRP78, such as the L peptide (RLLDTNRPLLPY), may be incorporated into protein-based drug carriers to enhance targeting.
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Affiliation(s)
- Hugo Avila
- Department of Pharmacology and Pharmaceutical Sciences, USC School of Pharmacy, Los Angeles, California 90089, United States
| | - Jingmei Yu
- Department of Pharmacology and Pharmaceutical Sciences, USC School of Pharmacy, Los Angeles, California 90089, United States
| | - Geetha Boddu
- Department of Pharmacology and Pharmaceutical Sciences, USC School of Pharmacy, Los Angeles, California 90089, United States
| | - Alvin Phan
- Department of Pharmacology and Pharmaceutical Sciences, USC School of Pharmacy, Los Angeles, California 90089, United States
| | - Anh Truong
- Department of Pharmacology and Pharmaceutical Sciences, USC School of Pharmacy, Los Angeles, California 90089, United States
| | - Santosh Peddi
- Department of Pharmacology and Pharmaceutical Sciences, USC School of Pharmacy, Los Angeles, California 90089, United States
| | - Hao Guo
- Department of Pharmacology and Pharmaceutical Sciences, USC School of Pharmacy, Los Angeles, California 90089, United States
| | - Shin-Jae Lee
- Department of Pharmacology and Pharmaceutical Sciences, USC School of Pharmacy, Los Angeles, California 90089, United States
- Department of Biomedical Engineering, USC Viterbi School of Engineering, Los Angeles, California 90089, United States
| | - Mario Alba
- Department of Pharmacology and Pharmaceutical Sciences, USC School of Pharmacy, Los Angeles, California 90089, United States
| | - Ethan Canfield
- Mass Spectrometry Core, USC School of Pharmacy, Los Angeles, California 90089, United States
| | - Vicky Yamamoto
- Department of Biochemistry and Molecular Medicine, USC Keck School of Medicine, Los Angeles, California 90033, United States
| | - James C Paton
- Research Centre for Infectious Diseases, Department of Molecular and Biomedical Science, University of Adelaide, Adelaide 5005, Australia
| | - Adrienne W Paton
- Research Centre for Infectious Diseases, Department of Molecular and Biomedical Science, University of Adelaide, Adelaide 5005, Australia
| | - Amy S Lee
- Department of Biochemistry and Molecular Medicine, USC Keck School of Medicine, Los Angeles, California 90033, United States
| | - J Andrew MacKay
- Department of Pharmacology and Pharmaceutical Sciences, USC School of Pharmacy, Los Angeles, California 90089, United States
- Department of Biomedical Engineering, USC Viterbi School of Engineering, Los Angeles, California 90089, United States
- Department of Ophthalmology, USC Keck School of Medicine, Los Angeles, California 90033, United States
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Cheng Y, Cheng A, Jia Y, Yang L, Ning Y, Xu L, Zhong Y, Zhuang Z, Guan J, Zhang X, Lin Y, Zhou T, Fan X, Li J, Liu P, Yan G, Wu R. pH-Responsive Multifunctional Theranostic Rapamycin-Loaded Nanoparticles for Imaging and Treatment of Acute Ischemic Stroke. ACS Appl Mater Interfaces 2021; 13:56909-56922. [PMID: 34807583 DOI: 10.1021/acsami.1c16530] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Stroke is the second leading cause of death globally and the most common cause of severe disability. Several barriers need to be addressed more effectively to treat stroke, including efficient delivery of therapeutic agents, rapid release at the infarct site, precise imaging of the infarct site, and drug distribution monitoring. The present study aimed to develop a bio-responsive theranostic nanoplatform with signal-amplifying capability to deliver rapamycin (RAPA) to ischemic brain tissues and visually monitor drug distribution. A pH-sensitive theranostic RAPA-loaded nanoparticle system was designed since ischemic tissues have a low-pH microenvironment compared with normal tissues. The nanoparticles demonstrated good stability and biocompatibility and could efficiently load rapamycin, followed by its rapid release in acidic environments, thereby improving therapeutic accuracy. The nano-drug-delivery system also exhibited acid-enhanced magnetic resonance imaging (MRI) and near-infrared fluorescence (NIRF) imaging signal properties, enabling accurate multimodal imaging with minimal background noise, thus improving drug tracing and diagnostic accuracy. Finally, in vivo experiments confirmed that the nanoparticles preferentially aggregated in the ischemic hemisphere and exerted a neuroprotective effect in rats with transient middle cerebral artery occlusion (tMCAO). These pH-sensitive multifunctional theranostic nanoparticles could serve as a potential nanoplatform for drug tracing as well as the treatment and even diagnosis of acute ischemic stroke. Moreover, they could be a universal solution to achieve accurate in vivo imaging and treatment of other diseases.
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Affiliation(s)
- Yan Cheng
- Department of Radiology, The Second Affiliated Hospital, Shantou University Medical College, Shantou 515041, Guangdong, China
| | - Airong Cheng
- Department of Neurology, Chengwu County People's Hospital, Chengwu 274200, Shandong, China
| | - Yanlong Jia
- Department of Radiology, Xiangyang Central Hospital, Affiliated Hospital of Hubei University of Arts and Science, Hubei 441021, China
| | - Lin Yang
- Department of Radiology, The Second Affiliated Hospital, Shantou University Medical College, Shantou 515041, Guangdong, China
| | - Yan Ning
- Department of TCM, Shenzhen Maternity & Child Healthcare Hospital Affiliated to Southern Medical University, Shenzhen 518028, Guangdong, China
| | - Liang Xu
- Department of Radiology, The Second Affiliated Hospital, Shantou University Medical College, Shantou 515041, Guangdong, China
| | - Yazhi Zhong
- Department of Radiology, The Second Affiliated Hospital, Shantou University Medical College, Shantou 515041, Guangdong, China
| | - Zerui Zhuang
- Department of Neurosurgery, Sun Yat-Sen Memorial Hospital, Sun Yat-Sen University, Guangzhou 510120, China
- Department of Neurosurgery, Shantou Central Hospital, Affiliated Shantou Hospital of Sun Yat-Sen University, Shantou 515041, Guangdong, China
- Department of Neurosurgery, Second Affiliated Hospital, Shantou University Medical College, Shantou 515041, Guangdong, China
| | - Jitian Guan
- Department of Radiology, The Second Affiliated Hospital, Shantou University Medical College, Shantou 515041, Guangdong, China
| | - Xiaolei Zhang
- Department of Radiology, The Second Affiliated Hospital, Shantou University Medical College, Shantou 515041, Guangdong, China
| | - Yan Lin
- Department of Radiology, The Second Affiliated Hospital, Shantou University Medical College, Shantou 515041, Guangdong, China
| | - Teng Zhou
- Department of Computer Science, Shantou University, Shantou 515041, China
| | - Xiusong Fan
- Department of Radiology, Peking University Shenzhen Hospital, Shenzhen 518036, Guangdong, China
| | - Jianwu Li
- Transfusion Department, Peking University Shenzhen Hospital, Shenzhen 518036, Guangdong, China
| | - Peng Liu
- National & Local Joint Engineering Research Center of Orthopaedic Biomaterials, Department of Bone & Joint Surgery, Peking University Shenzhen Hospital, Shenzhen 518036, Guangdong, China
| | - Gen Yan
- Department of Radiology, The Second Affiliated Hospital of Xiamen Medical College, Xiamen 361023, Fujian, China
| | - Renhua Wu
- Department of Radiology, The Second Affiliated Hospital, Shantou University Medical College, Shantou 515041, Guangdong, China
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Wagner AJ, Ravi V, Riedel RF, Ganjoo K, Van Tine BA, Chugh R, Cranmer L, Gordon EM, Hornick JL, Du H, Grigorian B, Schmid AN, Hou S, Harris K, Kwiatkowski DJ, Desai NP, Dickson MA. nab-Sirolimus for Patients With Malignant Perivascular Epithelioid Cell Tumors. J Clin Oncol 2021; 39:3660-3670. [PMID: 34637337 PMCID: PMC8601264 DOI: 10.1200/jco.21.01728] [Citation(s) in RCA: 57] [Impact Index Per Article: 19.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2021] [Revised: 08/12/2021] [Accepted: 08/31/2021] [Indexed: 12/12/2022] Open
Abstract
PURPOSE Malignant perivascular epithelioid cell tumor (PEComa) is a rare aggressive sarcoma, with no approved treatment. To our knowledge, this phase II, single-arm, registration trial is the first prospective clinical trial in this disease, investigating the safety and efficacy of the mammalian target of rapamycin inhibitor nab-sirolimus (AMPECT, NCT02494570). PATIENTS AND METHODS Patients with malignant PEComa were treated with nab-sirolimus 100 mg/m2 intravenously once weekly for 2 weeks in 3-week cycles. The primary end point was objective response rate evaluated by independent radiology review. Key secondary end points included duration of response, progression-free survival, and safety. A key exploratory end point was tumor biomarker analysis. RESULTS Thirty-four patients were treated (safety evaluable), and 31 were evaluable for efficacy. The overall response rate was 39% (12 of 31; 95% CI, 22 to 58) with one complete and 11 partial responses, 52% (16 of 31) of patients had stable disease, and 10% (3 of 31) had progressive disease. Responses were of rapid onset (67% by week 6) and durable. Median duration of response was not reached after a median follow-up for response of 2.5 years, with 7 of 12 responders with treatment ongoing (range, 5.6-47.2+ months). Twenty-five of 31 patients had tumor mutation profiling: 8 of 9 (89%) patients with a TSC2 mutation achieved a confirmed response versus 2 of 16 (13%) without TSC2 mutation (P < .001). The median progression-free survival was 10.6 months (95% CI, 5.5 months to not reached), and the median overall survival was 40.8 months (95% CI, 22.2 months to not reached). Most treatment-related adverse events were grade 1 or 2 and were manageable for long-term treatment. No grade ≥ 4 treatment-related events occurred. CONCLUSION nab-Sirolimus is active in patients with malignant PEComa. The response rate, durability of response, disease control rate, and safety profile support that nab-sirolimus represents an important new treatment option for this disease.
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Affiliation(s)
- Andrew J. Wagner
- Dana-Farber Cancer Institute and Harvard Medical School, Boston MA
| | | | | | | | | | | | - Lee Cranmer
- University of Washington/Fred Hutchinson Cancer Research Center, Seattle, WA
| | | | | | - Heng Du
- Brigham and Women's Hospital, Boston, MA
| | | | | | - Shihe Hou
- Aadi Bioscience Inc, Pacific Palisades, CA
| | | | | | | | - Mark A. Dickson
- Memorial Sloan Kettering Cancer Center and Weill Cornell Medical College, New York, NY
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8
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Srivastava A, Arlian BM, Pang L, Kishimoto TK, Paulson JC. Tolerogenic Nanoparticles Impacting B and T Lymphocyte Responses Delay Autoimmune Arthritis in K/BxN Mice. ACS Chem Biol 2021; 16:1985-1993. [PMID: 34037371 PMCID: PMC8526371 DOI: 10.1021/acschembio.1c00212] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Current treatments for unwanted antibody responses largely rely on immunosuppressive drugs compromising overall immunity. New approaches to achieve antigen-specific tolerance are desirable to avoid unwanted side effects. Several nanoparticle-based approaches that utilize different mechanisms to tolerize the B or T cell arms of the humoral immune response have shown promise for induction of antigen-specific tolerance, raising the possibility that they could work synergistically if combined. Earlier we showed that Siglec-engaging tolerance-inducing antigenic liposomes (STALs) that display both an antigen (Ag) and glycan ligands of the inhibitory co-receptor CD22 (CD22L) lead to robust antigen-specific B cell tolerance to protein antigens in naive mice. In another approach, administration of free Ag with poly(lactic-co-glycolic acid)-rapamycin nanoparticles (PLGA-R) induced robust antigen-specific tolerance through production of regulatory T cells. Here we illustrate that coadministration of STALs together with PLGA-R to naive mice induced more robust tolerance to multiple antigen challenges than either nanoparticle alone. Moreover, in K/BxN mice that develop spontaneous autoimmune arthritis to the self-antigen glucose-6-phosphate-isomerase (GPI), co-delivery of GPI-LP-CD22L and PLGA-R delayed onset of disease and in some mice prevented the disease indefinitely. The results show synergy between B cell-tolerizing STALs and T cell-tolerizing PLGA-R and the potential to induce tolerance in early stage autoimmune disease.
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Affiliation(s)
- Amrita Srivastava
- Department of Molecular Medicine, The Scripps Research Institute, La Jolla, CA 92037, USA
| | - Britni M. Arlian
- Department of Molecular Medicine, The Scripps Research Institute, La Jolla, CA 92037, USA
| | - Lijuan Pang
- Department of Molecular Medicine, The Scripps Research Institute, La Jolla, CA 92037, USA
| | | | - James C. Paulson
- Department of Molecular Medicine, The Scripps Research Institute, La Jolla, CA 92037, USA
- Department of Immunology and Microbiology, The Scripps Research Institute, La Jolla, CA 92037, USA
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9
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Guo Q, Chen Q, Zhang Y, Zhou W, Li X, Li C, Zhang Y, Chen H, Liu P, Chu Y, Sun T, Jiang C. Click-Nucleic-Acid-Containing Codelivery System Inducing Collapse of Cellular Homeostasis for Tumor Therapy through Bidirectional Regulation of Autophagy and Glycolysis. ACS Appl Mater Interfaces 2020; 12:57757-57767. [PMID: 33319976 DOI: 10.1021/acsami.0c18361] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
As a rapid proliferating tissue, tumor cells have to optimize nutrient utilization to withstand harsh conditions. Several approaches have been explored to inhibit the growth and metastasis of tumor by disrupting the reprogrammed tumor metabolism. However, nutrient limitations within solid tumors may induce the metabolic flexibility of malignant cells to sustain growth and survival using one nutrient to fill metabolite pools normally supplied by the other. To overcome this predicament, a promising click-nucleic-acid-containing platform for codelivery of rapamycin, anti-PFKFB4 siRNA, and targeting ligand aptamer AS1411 was applied. PFKFB4 could act as a promising target for tumor therapy for being a molecular fulcrum that could couple glycolysis to autophagy by promoting aggressive metastatic tumors. The downregulation of PFKFB4 can help inhibit the SRC3/Akt/mTOR pathway, leading autophagy to the direction of promoting apoptosis of tumor cells, which is induced by the collapse of tumor cellular homeostasis, while low dosages of rapamycin could decrease surgery-induced immune dysfunction. Enhanced tumor autophagy, favorable in vivo antitumor efficacy, and effective systematic immune activation are observed after treatment, suggesting that autophagy and glycolysis can serve as an integrated target for tumor treatment.
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Affiliation(s)
- Qin Guo
- Key Laboratory of Smart Drug Delivery, Ministry of Education, State Key Laboratory of Medical Neurobiology and MOE Frontiers Center for Brain Science, Department of Pharmaceutics, School of Pharmacy, Fudan University, Shanghai 201203, China
| | - Qinjun Chen
- Key Laboratory of Smart Drug Delivery, Ministry of Education, State Key Laboratory of Medical Neurobiology and MOE Frontiers Center for Brain Science, Department of Pharmaceutics, School of Pharmacy, Fudan University, Shanghai 201203, China
| | - Yujie Zhang
- Key Laboratory of Smart Drug Delivery, Ministry of Education, State Key Laboratory of Medical Neurobiology and MOE Frontiers Center for Brain Science, Department of Pharmaceutics, School of Pharmacy, Fudan University, Shanghai 201203, China
| | - Wenxi Zhou
- Key Laboratory of Smart Drug Delivery, Ministry of Education, State Key Laboratory of Medical Neurobiology and MOE Frontiers Center for Brain Science, Department of Pharmaceutics, School of Pharmacy, Fudan University, Shanghai 201203, China
| | - Xuwen Li
- Key Laboratory of Smart Drug Delivery, Ministry of Education, State Key Laboratory of Medical Neurobiology and MOE Frontiers Center for Brain Science, Department of Pharmaceutics, School of Pharmacy, Fudan University, Shanghai 201203, China
| | - Chao Li
- Key Laboratory of Smart Drug Delivery, Ministry of Education, State Key Laboratory of Medical Neurobiology and MOE Frontiers Center for Brain Science, Department of Pharmaceutics, School of Pharmacy, Fudan University, Shanghai 201203, China
| | - Yiwen Zhang
- Key Laboratory of Smart Drug Delivery, Ministry of Education, State Key Laboratory of Medical Neurobiology and MOE Frontiers Center for Brain Science, Department of Pharmaceutics, School of Pharmacy, Fudan University, Shanghai 201203, China
| | - Hongyi Chen
- Key Laboratory of Smart Drug Delivery, Ministry of Education, State Key Laboratory of Medical Neurobiology and MOE Frontiers Center for Brain Science, Department of Pharmaceutics, School of Pharmacy, Fudan University, Shanghai 201203, China
| | - Peixin Liu
- Key Laboratory of Smart Drug Delivery, Ministry of Education, State Key Laboratory of Medical Neurobiology and MOE Frontiers Center for Brain Science, Department of Pharmaceutics, School of Pharmacy, Fudan University, Shanghai 201203, China
| | - Yongchao Chu
- Key Laboratory of Smart Drug Delivery, Ministry of Education, State Key Laboratory of Medical Neurobiology and MOE Frontiers Center for Brain Science, Department of Pharmaceutics, School of Pharmacy, Fudan University, Shanghai 201203, China
| | - Tao Sun
- Key Laboratory of Smart Drug Delivery, Ministry of Education, State Key Laboratory of Medical Neurobiology and MOE Frontiers Center for Brain Science, Department of Pharmaceutics, School of Pharmacy, Fudan University, Shanghai 201203, China
| | - Chen Jiang
- Key Laboratory of Smart Drug Delivery, Ministry of Education, State Key Laboratory of Medical Neurobiology and MOE Frontiers Center for Brain Science, Department of Pharmaceutics, School of Pharmacy, Fudan University, Shanghai 201203, China
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10
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Liu P, Liu X, Cheng Y, Zhong S, Shi X, Wang S, Liu M, Ding J, Zhou W. Core-Shell Nanosystems for Self-Activated Drug-Gene Combinations against Triple-Negative Breast Cancer. ACS Appl Mater Interfaces 2020; 12:53654-53664. [PMID: 33205940 DOI: 10.1021/acsami.0c15089] [Citation(s) in RCA: 28] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
The combination of gene therapy with chemotherapeutics provides an efficacious strategy for enhanced tumor therapy. RNA-cleaving DNAzyme has been recognized as a promising gene-silencing tool, while its combination with chemotherapeutic drugs has been limited by the lack of an effective codelivery system to allow sufficient intracellular DNAzyme activation, which requires specific metal ions as a cofactor. Here, a self-activatable DNAzyme/drug core-shell codelivery system is fabricated to combat triple-negative breast cancer (TNBC). The hydrophobic chemotherapeutic, rapamycin (RAP), is self-assembled into the pure drug nanocore, and the metal-organic framework (MOF) shell based on coordination between Mn2+ and tannic acid (TA) is coated on the surface to coload an autophagy-inhibiting DNAzyme. The nanosystem efficiently delivers the payloads into tumor cells, and upon endocytosis, the MOF shell is disintegrated to release the therapeutics in response to an acidic endo/lysosome environment and intracellular glutathione (GSH). Notably, the coreleased Mn2+ serves as the cofactor of DNAzyme for effective self-activation, which suppresses the expression of Beclin 1 protein, the key initiator of autophagy, resulting in a significantly strengthened antitumor effect of RAP. Using tumor-bearing mouse models, the nanosystem could passively accumulate into the tumor tissue, impose potent gene-silencing efficacy, and thus sensitize chemotherapy to inhibit tumor growth upon intravenous administration, providing opportunities for combined gene-drug TNBC therapy.
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Affiliation(s)
- Peng Liu
- Xiangya School of Pharmaceutical Sciences, Central South University, Changsha, Hunan 410013, China
| | - Xuanjun Liu
- Xiangya School of Pharmaceutical Sciences, Central South University, Changsha, Hunan 410013, China
| | - Yan Cheng
- Xiangya School of Pharmaceutical Sciences, Central South University, Changsha, Hunan 410013, China
| | - Shenghui Zhong
- Xiangya School of Pharmaceutical Sciences, Central South University, Changsha, Hunan 410013, China
- School of Medicine, Yichun University, Yichun, Jiangxi 336000, China
| | - Xinyi Shi
- Xiangya School of Pharmaceutical Sciences, Central South University, Changsha, Hunan 410013, China
| | - Shengfeng Wang
- Xiangya School of Pharmaceutical Sciences, Central South University, Changsha, Hunan 410013, China
- Department of Pharmacy, The Third Xiangya Hospital of Central South University, Changsha, Hunan 410013, China
| | - Miao Liu
- Xiangya School of Pharmaceutical Sciences, Central South University, Changsha, Hunan 410013, China
- Department of Pharmacy, Hunan Cancer Hospital, Changsha, Hunan 410011, China
| | - Jinsong Ding
- Xiangya School of Pharmaceutical Sciences, Central South University, Changsha, Hunan 410013, China
| | - Wenhu Zhou
- Xiangya School of Pharmaceutical Sciences, Central South University, Changsha, Hunan 410013, China
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11
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Bassin EJ, Buckley AR, Piganelli JD, Little SR. TRI microparticles prevent inflammatory arthritis in a collagen-induced arthritis model. PLoS One 2020; 15:e0239396. [PMID: 32966314 PMCID: PMC7510963 DOI: 10.1371/journal.pone.0239396] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2020] [Accepted: 09/06/2020] [Indexed: 12/28/2022] Open
Abstract
Despite recent progress in the treatment of rheumatoid arthritis (RA), many patients still fail to achieve remission or low disease activity. An imbalance between auto-reactive effector T cells (Teff) and regulatory T cells (Treg) may contribute to joint inflammation and damage in RA. Therefore, restoring this balance is a promising approach for the treatment of inflammatory arthritis. Accordingly, our group has previously shown that the combination of TGF-β-releasing microparticles (MP), rapamycin-releasing MP, and IL-2-releasing MP (TRI MP) can effectively increase the ratio of Tregs to Teff in vivo and provide disease protection in several preclinical models. In this study TRI MP was evaluated in the collagen-induced arthritis (CIA) model. Although this formulation has been tested previously in models of destructive inflammation and transplantation, this is the first model of autoimmunity for which this therapy has been applied. In this context, TRI MP effectively reduced arthritis incidence, the severity of arthritis scores, and bone erosion. The proposed mechanism of action includes not only reducing CD4+ T cell proliferation, but also expanding a regulatory population in the periphery soon after TRI MP administration. These changes were reflected in the CD4+ T cell population that infiltrated the paws at the onset of arthritis and were associated with a reduction of immune infiltrate and inflammatory myeloid cells in the paws. TRI MP administration also reduced the titer of collagen antibodies, however the contribution of this reduced titer to disease protection remains uncertain since there was no correlation between collagen antibody titer and arthritis score.
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Affiliation(s)
- Ethan J. Bassin
- Department of Immunology, University of Pittsburgh, Pittsburgh, Pennsylvania, United States of America
| | - Abigail R. Buckley
- Division of Pediatric Surgery, Department of Surgery, Children’s Hospital of Pittsburgh, University of Pittsburgh, Pittsburgh, Pennsylvania, United States of America
| | - Jon D. Piganelli
- Department of Immunology, University of Pittsburgh, Pittsburgh, Pennsylvania, United States of America
- Division of Pediatric Surgery, Department of Surgery, Children’s Hospital of Pittsburgh, University of Pittsburgh, Pittsburgh, Pennsylvania, United States of America
- * E-mail: (SRL); (JDP)
| | - Steven R. Little
- Department of Immunology, University of Pittsburgh, Pittsburgh, Pennsylvania, United States of America
- Department of Chemical Engineering, University of Pittsburgh, Pittsburgh, Pennsylvania, United States of America
- Department of Bioengineering, University of Pittsburgh, Pittsburgh, Pennsylvania, United States of America
- Department of Ophthalmology, University of Pittsburgh, Pittsburgh, Pennsylvania, United States of America
- Department of Pharmaceutical Science, University of Pittsburgh, Pittsburgh, Pennsylvania, United States of America
- * E-mail: (SRL); (JDP)
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12
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Hu C, Luo R, Wang Y. Heart Valves Cross-Linked with Erythrocyte Membrane Drug-Loaded Nanoparticles as a Biomimetic Strategy for Anti-coagulation, Anti-inflammation, Anti-calcification, and Endothelialization. ACS Appl Mater Interfaces 2020; 12:41113-41126. [PMID: 32833422 DOI: 10.1021/acsami.0c12688] [Citation(s) in RCA: 33] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
In recent years, valvular heart disease has become a serious disease threatening human life and is a major cause of death worldwide. However, the glutaraldehyde (GLU)-treated biological heart valves (BHVs) fail to meet all requirements of clinical application due to disadvantages such as valve thrombus, cytotoxicity, endothelialization difficulty, immune response, and calcification. Encouragingly, there are a large number of carboxyls as well as a few amino groups on the surface of GLU-treated BHVs that can be modified to enhance biocompatibility. Inspired by natural biological systems, we report a novel approach in which the heart valve was cross-linked with erythrocyte membrane biomimetic drug-loaded nanoparticles. Such modified heart valves not only preserved the structural integrity, stability, and mechanical properties of the GLU-treated BHVs but also greatly improved anti-coagulation, anti-inflammation, anti-calcification, and endothelialization. The in vitro results demonstrated that the modified heart valves had long-term anti-coagulation properties and enhanced endothelialization processes. The modified heart valves also showed good biocompatibility, including blood and cell biocompatibility. Most importantly, the modified heart valves reduced the TNF-α levels and increased IL-10 compared to GLU-treated BHVs. In vivo animal experiments also confirmed that the modified heart valves had an ultrastrong resistance to calcification after implantation in rats for 120 days. The mechanism of anti-calcification in vivo was mainly due to the controlled release of anti-inflammatory drugs that reduced the inflammatory response after valve implantation. In summary, this therapeutic approach based on BHVs cross-linking with erythrocyte membrane biomimetic nanoparticles sparks a novel design for valvular heart disease therapy.
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Affiliation(s)
- Cheng Hu
- National Engineering Research Center for Biomaterials, Sichuan University, Chengdu, Sichuan 610064, People's Republic of China
| | - Rifang Luo
- National Engineering Research Center for Biomaterials, Sichuan University, Chengdu, Sichuan 610064, People's Republic of China
| | - Yunbing Wang
- National Engineering Research Center for Biomaterials, Sichuan University, Chengdu, Sichuan 610064, People's Republic of China
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13
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Shigdel UK, Lee SJ, Sowa ME, Bowman BR, Robison K, Zhou M, Pua KH, Stiles DT, Blodgett JAV, Udwary DW, Rajczewski AT, Mann AS, Mostafavi S, Hardy T, Arya S, Weng Z, Stewart M, Kenyon K, Morgenstern JP, Pan E, Gray DC, Pollock RM, Fry AM, Klausner RD, Townson SA, Verdine GL. Genomic discovery of an evolutionarily programmed modality for small-molecule targeting of an intractable protein surface. Proc Natl Acad Sci U S A 2020; 117:17195-17203. [PMID: 32606248 PMCID: PMC7382241 DOI: 10.1073/pnas.2006560117] [Citation(s) in RCA: 30] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
Abstract
The vast majority of intracellular protein targets are refractory toward small-molecule therapeutic engagement, and additional therapeutic modalities are needed to overcome this deficiency. Here, the identification and characterization of a natural product, WDB002, reveals a therapeutic modality that dramatically expands the currently accepted limits of druggability. WDB002, in complex with the FK506-binding protein (FKBP12), potently and selectively binds the human centrosomal protein 250 (CEP250), resulting in disruption of CEP250 function in cells. The recognition mode is unprecedented in that the targeted domain of CEP250 is a coiled coil and is topologically featureless, embodying both a structural motif and surface topology previously considered on the extreme limits of "undruggability" for an intracellular target. Structural studies reveal extensive protein-WDB002 and protein-protein contacts, with the latter being distinct from those seen in FKBP12 ternary complexes formed by FK506 and rapamycin. Outward-facing structural changes in a bound small molecule can thus reprogram FKBP12 to engage diverse, otherwise "undruggable" targets. The flat-targeting modality demonstrated here has the potential to expand the druggable target range of small-molecule therapeutics. As CEP250 was recently found to be an interaction partner with the Nsp13 protein of the SARS-CoV-2 virus that causes COVID-19 disease, it is possible that WDB002 or an analog may exert useful antiviral activity through its ability to form high-affinity ternary complexes containing CEP250 and FKBP12.
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Affiliation(s)
| | | | | | | | | | - Minyun Zhou
- Warp Drive Bio, Inc., Redwood City, CA 94063
| | | | | | | | | | | | - Alan S Mann
- Warp Drive Bio, Inc., Redwood City, CA 94063
| | | | - Tara Hardy
- Department of Molecular and Cell Biology, University of Leicester, LE1 7RH Leicester, United Kingdom
| | - Sukrat Arya
- Department of Molecular and Cell Biology, University of Leicester, LE1 7RH Leicester, United Kingdom
| | | | | | - Kyle Kenyon
- Warp Drive Bio, Inc., Redwood City, CA 94063
| | | | - Ende Pan
- Warp Drive Bio, Inc., Redwood City, CA 94063
| | | | | | - Andrew M Fry
- Department of Molecular and Cell Biology, University of Leicester, LE1 7RH Leicester, United Kingdom
| | | | | | - Gregory L Verdine
- Warp Drive Bio, Inc., Redwood City, CA 94063;
- Department of Stem Cell and Regenerative Biology, Harvard University, Cambridge, MA 02138
- Department of Chemistry and Chemical Biology, Harvard University, Cambridge, MA 02138
- Department of Molecular and Cellular Biology, Harvard University, Cambridge, MA 02138
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14
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Le Guyader G, Vieillard V, Andrieux K, Rollo M, Thirion O, Wolkenstein P, Paul M. Long-term stability of 0.1% rapamycin hydrophilic gel in the treatment of facial angiofibromas. Eur J Hosp Pharm 2020; 27:e48-e52. [PMID: 32296505 PMCID: PMC7147563 DOI: 10.1136/ejhpharm-2018-001695] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2018] [Revised: 10/04/2018] [Accepted: 10/09/2018] [Indexed: 01/02/2023] Open
Abstract
Objectives In recent years, various formulations containing rapamycin, mainly petrolatum-based, have been tested on facial angiofibromas in tuberous sclerosis. They are often poorly tolerated due to irritation and bleeding. In addition, their effectiveness was insufficient in young adults. The objective of this study was to develop and characterise a hydro-alcoholic gel containing solubilised rapamycin. The stability of the product stored at 4°C was evaluated over 1 year. Methods Two different 0.1% rapamycin gels were formulated with or without α-tocopherol and urea. Different methods were used to characterise the gels: HPLC, gas chromatography, pH, visual observation and optical microscopy. A physico-chemical and microbiological stability study was also conducted for 1 year at 4°C. Results Gels were physically and microbiologically stable after 1 year at 4°C: organoleptic characteristics and pH unchanged, no significant decrease in rapamycin was observed, tocopherol droplet size was constant and rheological behaviour was not altered. Conclusions This study describes a new gel formulation to improve skin penetration using various excipients to promote skin tolerance. This study provides, for the first time, detailed stability data for a hydro-alcoholic rapamycin gel.
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Affiliation(s)
| | - Victoire Vieillard
- Pharmacy Department, Henri Mondor Hospital Group, AP-HP, Creteil, France
| | - Karine Andrieux
- Unité de Technologies Chimiques et Biologiques pour la Santé (UTCBS), UMR CNRS 8258 U1022 INSERM, Université Paris Descartes, Paris, France
| | - Mylène Rollo
- Pharmacy Department, Henri Mondor Hospital Group, AP-HP, Creteil, France
| | - Olivier Thirion
- Pharmacy Department, Henri Mondor Hospital Group, AP-HP, Creteil, France
| | - Pierre Wolkenstein
- Department of Dermatology, Henri Mondor Hospital Group, AP-HP, Créteil, France
| | - Muriel Paul
- Pharmacy Department, Henri Mondor Hospital Group, AP-HP, Creteil, France
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15
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Chen C, Chen J, Wu W, Shi Y, Jin L, Petrini L, Shen L, Yuan G, Ding W, Ge J, Edelman ER, Migliavacca F. In vivo and in vitro evaluation of a biodegradable magnesium vascular stent designed by shape optimization strategy. Biomaterials 2019; 221:119414. [PMID: 31419654 PMCID: PMC6732791 DOI: 10.1016/j.biomaterials.2019.119414] [Citation(s) in RCA: 53] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2019] [Revised: 07/30/2019] [Accepted: 08/03/2019] [Indexed: 01/25/2023]
Abstract
The performance of biodegradable magnesium alloy stents (BMgS) requires special attention to non-uniform residual stress distribution and stress concentration, which can accelerate localized degradation after implantation. We now report on a novel concept in stent shape optimization using a finite element method (FEM) toolkit. A Mg-Nd-Zn-Zr alloy with uniform degradation behavior served as the basis of our BMgS. Comprehensive in vitro evaluations drove stent optimization, based on observed crimping and balloon inflation performance, measurement of radial strength, and stress condition validation via microarea-XRD. Moreover, a Rapamycin-eluting polymer coating was sprayed on the prototypical BMgS to improve the corrosion resistance and release anti-hyperplasia drugs. In vivo evaluation of the optimized coated BMgS was conducted in the iliac artery of New Zealand white rabbit with quantitative coronary angiography (QCA), optical coherence tomography (OCT) and micro-CT observation at 1, 3, 5-month follow-ups. Neither thrombus or early restenosis was observed, and the coated BMgS supported the vessel effectively prior to degradation and allowed for arterial healing thereafter. The proposed shape optimization framework based on FEM provides an novel concept in stent design and in-depth understanding of how deformation history affects the biomechanical performance of BMgS. Computational analysis tools can indeed promote the development of biodegradable magnesium stents.
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Affiliation(s)
- Chenxin Chen
- National Engineering Research Center of Light Alloy Net Forming & State Key Laboratory of Metal Matrix Composite, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai, 200240, China; Laboratory of Biological Structure Mechanics (LaBS), Department of Chemistry, Materials and Chemical Engineering "Giulio Natta", Politecnico di Milano, Piazza Leonardo da Vinci, 32, Milan, 20133, Italy
| | - Jiahui Chen
- Shanghai Institute of Cardiovascular Diseases, Department of Cardiology, Zhongshan Hospital, Fudan University, Shanghai, 200032, China
| | - Wei Wu
- Laboratory of Biological Structure Mechanics (LaBS), Department of Chemistry, Materials and Chemical Engineering "Giulio Natta", Politecnico di Milano, Piazza Leonardo da Vinci, 32, Milan, 20133, Italy; Department of Mechanical Engineering, The University of Texas at San Antonio, One UTSA Circle, San Antonio, TX, 78249-0669, USA
| | - Yongjuan Shi
- National Engineering Research Center of Light Alloy Net Forming & State Key Laboratory of Metal Matrix Composite, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai, 200240, China
| | - Liang Jin
- National Engineering Research Center of Light Alloy Net Forming & State Key Laboratory of Metal Matrix Composite, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai, 200240, China
| | - Lorenza Petrini
- Department of Civil and Environmental Engineering, Politecnico di Milano, Piazza Leonardo da Vinci, 32, Milan, 20133, Italy
| | - Li Shen
- Shanghai Institute of Cardiovascular Diseases, Department of Cardiology, Zhongshan Hospital, Fudan University, Shanghai, 200032, China
| | - Guangyin Yuan
- National Engineering Research Center of Light Alloy Net Forming & State Key Laboratory of Metal Matrix Composite, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai, 200240, China.
| | - Wenjiang Ding
- National Engineering Research Center of Light Alloy Net Forming & State Key Laboratory of Metal Matrix Composite, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai, 200240, China
| | - Junbo Ge
- Shanghai Institute of Cardiovascular Diseases, Department of Cardiology, Zhongshan Hospital, Fudan University, Shanghai, 200032, China
| | - Elazer R Edelman
- Institute for Medical Engineering and Science, Massachusetts Institute of Technology, Cambridge, MA, 02139, USA; Cardiovascular Division, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, 02115, USA
| | - Francesco Migliavacca
- Laboratory of Biological Structure Mechanics (LaBS), Department of Chemistry, Materials and Chemical Engineering "Giulio Natta", Politecnico di Milano, Piazza Leonardo da Vinci, 32, Milan, 20133, Italy.
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16
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McGuire TR, Coulter DW, Bai D, Sughroue JA, Li J, Yang Z, Qiao Z, Liu Y, Murry DJ, Chhonker YS, McIntyre EM, Alexander G, Sharp JG, Li R. Effects of novel pyrrolomycin MP1 in MYCN amplified chemoresistant neuroblastoma cell lines alone and combined with temsirolimus. BMC Cancer 2019; 19:837. [PMID: 31455317 PMCID: PMC6712804 DOI: 10.1186/s12885-019-6033-2] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2018] [Accepted: 08/13/2019] [Indexed: 12/17/2022] Open
Abstract
BACKGROUND The activity of MP1, a pyrrolomycin, was studied in MYCN amplified neuroblastoma (NB) alone and combined with temsirolimus (TEM). METHODS Activity of MP1 was tested in MYCN amplified (BE-2c, IMR) and non amplified (SKN-AS) NB cells. The effect of MP1 on MYCN, MCL-1, cleaved PARP, LC3II/LC3I, bcl-2, BAX, and BRD-4 were determined by western blot and RNAseq. The effect of MP1 on metabolism, mitochondrial morphology, and cell cycle was determined. Toxicology and efficacy of MP1 plus TEM were evaluated. RESULTS The IC50 of MP1 was 0.096 μM in BE-2c cells compared to 0.89 μM in IMR, and >50 μM in SKN-AS. The IC50 of MP1 plus TEM in BE-2c cells was 0.023 μM. MP1 inhibited metabolism leading to quiescence and produced a decline in cell cycle S-phase. Electron microscopy showed cristae loss and rounding up of mitochondria. Gene and protein expression for MYCN and MCL-1 declined while LCII and cleaved PARP increased. Protein expression of BAX, bcl-2, and BRD-4 were not significantly changed after MP1 treatment. The in-vivo concentrations of MP1 in blood and tumor were sufficient to produce the biologic effects seen in-vitro. MP1 plus TEM produced a complete response in 3 out of 5 tumor bearing mice. In a second mouse study, the combination of MP1 and TEM slowed tumor growth compared to control. CONCLUSIONS MP1 has a potent inhibitory effect on the viability of MYCN amplified NB. Inhibition of metabolism by MP1 induced quiescence and autophagy with a favorable toxicology and drug distribution profile. When combined with TEM anti-tumor activity was potentiated in-vitro and in-vivo.
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Affiliation(s)
- Timothy R McGuire
- Department of Pharmacy Practice and Science, College of Pharmacy, University of Nebraska Medical Center, 986145 Nebraska Medical Center, Omaha, NE, 68198-6145, USA.
| | - Don W Coulter
- College of Medicine, Division of Pediatrics, University of Nebraska Medical Center, Omaha, NE, USA
| | - Dachang Bai
- Department of Pharmacy Practice and Science, College of Pharmacy, University of Nebraska Medical Center, 986145 Nebraska Medical Center, Omaha, NE, 68198-6145, USA
| | - Jason A Sughroue
- Department of Pharmacy Practice and Science, College of Pharmacy, University of Nebraska Medical Center, 986145 Nebraska Medical Center, Omaha, NE, 68198-6145, USA
| | - Jerry Li
- Department of Pharmacy Practice and Science, College of Pharmacy, University of Nebraska Medical Center, 986145 Nebraska Medical Center, Omaha, NE, 68198-6145, USA
| | - Zunhua Yang
- Department of Pharmacy Practice and Science, College of Pharmacy, University of Nebraska Medical Center, 986145 Nebraska Medical Center, Omaha, NE, 68198-6145, USA
| | - Zhen Qiao
- Department of Pharmacy Practice and Science, College of Pharmacy, University of Nebraska Medical Center, 986145 Nebraska Medical Center, Omaha, NE, 68198-6145, USA
| | - Yan Liu
- Department of Pharmacy Practice and Science, College of Pharmacy, University of Nebraska Medical Center, 986145 Nebraska Medical Center, Omaha, NE, 68198-6145, USA
| | - Daryl J Murry
- Department of Pharmacy Practice and Science, College of Pharmacy, University of Nebraska Medical Center, 986145 Nebraska Medical Center, Omaha, NE, 68198-6145, USA
| | - Yashpal S Chhonker
- Department of Pharmacy Practice and Science, College of Pharmacy, University of Nebraska Medical Center, 986145 Nebraska Medical Center, Omaha, NE, 68198-6145, USA
| | - Erin M McIntyre
- Department of Pharmacy Practice and Science, College of Pharmacy, University of Nebraska Medical Center, 986145 Nebraska Medical Center, Omaha, NE, 68198-6145, USA
| | - Gracey Alexander
- Department of Pharmacy Practice and Science, College of Pharmacy, University of Nebraska Medical Center, 986145 Nebraska Medical Center, Omaha, NE, 68198-6145, USA
| | - John G Sharp
- Genetics, Cell Biology and Anatomy, University of Nebraska Medical Center, Omaha, NE, USA
| | - Rongshi Li
- Department of Pharmacy Practice and Science, College of Pharmacy, University of Nebraska Medical Center, 986145 Nebraska Medical Center, Omaha, NE, 68198-6145, USA.
- Chemistry and Medicinal Chemistry, UNMC Center for Drug Discovery & Department of Pharmaceutical Sciences, 986125 Nebraska Medical Center, Omaha, NE, 68198, USA.
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17
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McKittrick CM, Cardona MJ, Black RA, McCormick C. Development of a Bioactive Polymeric Drug Eluting Coronary Stent Coating Using Electrospraying. Ann Biomed Eng 2019; 48:271-281. [PMID: 31441008 PMCID: PMC6928095 DOI: 10.1007/s10439-019-02346-6] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2019] [Accepted: 08/13/2019] [Indexed: 02/05/2023]
Abstract
Drug-eluting stents are now routinely used in the treatment of acute coronary syndromes caused by coronary artery disease. Whilst the sustained release of anti-proliferative drugs from these devices has greatly reduced the need for repeat revascularisation procedures, this approach is not suitable for all patients and appears to delay regrowth of the endothelium, necessitating the use of prolonged dual anti-platelet therapy. Although the development of more advanced stent platforms and drug coatings has produced modest improvements in performance, these devices have not fully addressed the limitations experienced with their first-generation counterparts. In the present study, we developed a novel stent coating that provides controlled sirolimus release from a bioactive polymer (accelerate™ AT) that has previously been shown to support endothelial cell growth in vitro. A bespoke electrospray deposition process provided control over the coating thickness, surface roughness, drug load, and release kinetics. The resultant optimised coating combines rapid release of an anti-proliferative agent from a bioactive polymer coating that promotes re-endothelialisation, thereby offering potential protection against in-stent restenosis and thrombosis. This novel, dual-action coating therefore has significant therapeutic potential, with the enhanced control of drug load and release kinetics offered by electrospray deposition also opening up opportunities for more personalised treatment approaches. Further development and evaluation of these technologies in vitro and in vivo is therefore warranted.
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Affiliation(s)
- C M McKittrick
- Department of Biomedical Engineering, University of Strathclyde, Graham Hills Building, 40 George Street, Glasgow, G1 1QE, UK.
| | - M J Cardona
- Department of Biomedical Engineering, University of Strathclyde, Graham Hills Building, 40 George Street, Glasgow, G1 1QE, UK
| | - R A Black
- Department of Biomedical Engineering, University of Strathclyde, Graham Hills Building, 40 George Street, Glasgow, G1 1QE, UK
| | - C McCormick
- Department of Biomedical Engineering, University of Strathclyde, Graham Hills Building, 40 George Street, Glasgow, G1 1QE, UK
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Abstract
The macrolide rapamycin ( 1 ) was first described as an antifungal agent in 1975. Even though its biological target and the molecular details were yet to be discovered, rapamycin attracted our interest in the early 90s based on its reported immunosuppressive activity in transplantation models and based on findings that its mechanism of action was different from those of the known immunosuppressive agents ciclosporin and FK506. In this review we describe our efforts to chemically modify this complex and chemically very sensitive natural product. Despite the limitations regarding the reaction conditions compatible with rapamycin we discovered ways of selectively modifying specific functional groups. This allowed us, among others, to improve the stability of the parent molecule towards ring-opening. Our efforts culminated in the discovery and development of the 40-O-alkylated derivative everolimus 2 which became a useful drug in solid organ transplantation, in various cancer indications and as the active principle of the market leading drug-eluting stent.
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Affiliation(s)
- Sylvain Cottens
- Novartis Institutes for BioMedical Research, Novartis Pharma AG, CH-4056 Basel, Switzerland; Captor Therapeutics, 54-427 Wroclaw, Poland
| | - Jörg Kallen
- Novartis Institutes for BioMedical Research, Novartis Pharma AG, CH-4056 Basel, Switzerland
| | - Walter Schuler
- Novartis Institutes for BioMedical Research, Novartis Pharma AG, CH-4056 Basel, Switzerland
| | - Richard Sedrani
- Novartis Institutes for BioMedical Research, Novartis Pharma AG, CH-4056 Basel, Switzerland
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19
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Zhang X, Chen W, Gao Q, Yang J, Yan X, Zhao H, Su L, Yang M, Gao C, Yao Y, Inoki K, Li D, Shao R, Wang S, Sahoo N, Kudo F, Eguchi T, Ruan B, Xu H. Rapamycin directly activates lysosomal mucolipin TRP channels independent of mTOR. PLoS Biol 2019; 17:e3000252. [PMID: 31112550 PMCID: PMC6528971 DOI: 10.1371/journal.pbio.3000252] [Citation(s) in RCA: 62] [Impact Index Per Article: 12.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2018] [Accepted: 04/18/2019] [Indexed: 02/06/2023] Open
Abstract
Rapamycin (Rap) and its derivatives, called rapalogs, are being explored in clinical trials targeting cancer and neurodegeneration. The underlying mechanisms of Rap actions, however, are not well understood. Mechanistic target of rapamycin (mTOR), a lysosome-localized protein kinase that acts as a critical regulator of cellular growth, is believed to mediate most Rap actions. Here, we identified mucolipin 1 (transient receptor potential channel mucolipin 1 [TRPML1], also known as MCOLN1), the principle Ca2+ release channel in the lysosome, as another direct target of Rap. Patch-clamping of isolated lysosomal membranes showed that micromolar concentrations of Rap and some rapalogs activated lysosomal TRPML1 directly and specifically. Pharmacological inhibition or genetic inactivation of mTOR failed to mimic the Rap effect. In vitro binding assays revealed that Rap bound directly to purified TRPML1 proteins with a micromolar affinity. In both healthy and disease human fibroblasts, Rap and rapalogs induced autophagic flux via nuclear translocation of transcription factor EB (TFEB). However, such effects were abolished in TRPML1-deficient cells or by TRPML1 inhibitors. Hence, Rap and rapalogs promote autophagy via a TRPML1-dependent mechanism. Given the demonstrated roles of TRPML1 and TFEB in cellular clearance, we propose that lysosomal TRPML1 may contribute a significant portion to the in vivo neuroprotective and anti-aging effects of Rap via an augmentation of autophagy and lysosomal biogenesis.
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Affiliation(s)
- Xiaoli Zhang
- Department of Molecular, Cellular, and Developmental Biology, University of Michigan, Ann Arbor, Michigan, United States of America
| | - Wei Chen
- Department of Molecular, Cellular, and Developmental Biology, University of Michigan, Ann Arbor, Michigan, United States of America
| | - Qiong Gao
- Department of Molecular, Cellular, and Developmental Biology, University of Michigan, Ann Arbor, Michigan, United States of America
| | - Junsheng Yang
- Department of Molecular, Cellular, and Developmental Biology, University of Michigan, Ann Arbor, Michigan, United States of America
- Collaborative Innovation Center of Yangtze River Delta Region Green Pharmaceuticals, College of Pharmaceutical Sciences, Zhejiang University of Technology, Hangzhou, China
| | - Xueni Yan
- Collaborative Innovation Center of Yangtze River Delta Region Green Pharmaceuticals, College of Pharmaceutical Sciences, Zhejiang University of Technology, Hangzhou, China
| | - Han Zhao
- Collaborative Innovation Center of Yangtze River Delta Region Green Pharmaceuticals, College of Pharmaceutical Sciences, Zhejiang University of Technology, Hangzhou, China
| | - Lin Su
- Collaborative Innovation Center of Yangtze River Delta Region Green Pharmaceuticals, College of Pharmaceutical Sciences, Zhejiang University of Technology, Hangzhou, China
| | - Meimei Yang
- Department of Molecular, Cellular, and Developmental Biology, University of Michigan, Ann Arbor, Michigan, United States of America
- Department of Neurology, The Fourth Hospital of Harbin Medical University, Harbin, China
| | - Chenlang Gao
- Department of Molecular, Cellular, and Developmental Biology, University of Michigan, Ann Arbor, Michigan, United States of America
| | - Yao Yao
- Department of Integrative and Molecular Physiology and Internal Medicine, Life Sciences Institute, University of Michigan, Ann Arbor, Michigan, United States of America
| | - Ken Inoki
- Department of Integrative and Molecular Physiology and Internal Medicine, Life Sciences Institute, University of Michigan, Ann Arbor, Michigan, United States of America
| | - Dan Li
- Collaborative Innovation Center of Yangtze River Delta Region Green Pharmaceuticals, College of Pharmaceutical Sciences, Zhejiang University of Technology, Hangzhou, China
| | - Rong Shao
- Collaborative Innovation Center of Yangtze River Delta Region Green Pharmaceuticals, College of Pharmaceutical Sciences, Zhejiang University of Technology, Hangzhou, China
| | - Shiyi Wang
- Department of Molecular, Cellular, and Developmental Biology, University of Michigan, Ann Arbor, Michigan, United States of America
| | - Nirakar Sahoo
- Department of Molecular, Cellular, and Developmental Biology, University of Michigan, Ann Arbor, Michigan, United States of America
| | - Fumitaka Kudo
- Department of Chemistry, Tokyo Institute of Technology, Ookayama, Meguro-ku, Tokyo, Japan
| | - Tadashi Eguchi
- Department of Chemistry, Tokyo Institute of Technology, Ookayama, Meguro-ku, Tokyo, Japan
| | - Benfang Ruan
- Collaborative Innovation Center of Yangtze River Delta Region Green Pharmaceuticals, College of Pharmaceutical Sciences, Zhejiang University of Technology, Hangzhou, China
- * E-mail: (HX); (BR)
| | - Haoxing Xu
- Department of Molecular, Cellular, and Developmental Biology, University of Michigan, Ann Arbor, Michigan, United States of America
- * E-mail: (HX); (BR)
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20
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Lu Y, Li C, Chen Q, Liu P, Guo Q, Zhang Y, Chen X, Zhang Y, Zhou W, Liang D, Zhang Y, Sun T, Lu W, Jiang C. Microthrombus-Targeting Micelles for Neurovascular Remodeling and Enhanced Microcirculatory Perfusion in Acute Ischemic Stroke. Adv Mater 2019; 31:e1808361. [PMID: 30957932 DOI: 10.1002/adma.201808361] [Citation(s) in RCA: 67] [Impact Index Per Article: 13.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/29/2018] [Revised: 03/13/2019] [Indexed: 06/09/2023]
Abstract
Reperfusion injury exists as the major obstacle to full recovery of neuron functions after ischemic stroke onset and clinical thrombolytic therapies. Complex cellular cascades including oxidative stress, neuroinflammation, and brain vascular impairment occur within neurovascular units, leading to microthrombus formation and ultimate neuron death. In this work, a multitarget micelle system is developed to simultaneously modulate various cell types involved in these events. Briefly, rapamycin is encapsulated in self-assembled micelles that are consisted of reactive oxygen species (ROS)-responsive and fibrin-binding polymers to achieve micelle retention and controlled drug release within the ischemic lesion. Neuron survival is reinforced by the combination of micelle facilitated ROS elimination and antistress signaling pathway interference under ischemia conditions. In vivo results demonstrate an overall remodeling of neurovascular unit through micelle polarized M2 microglia repair and blood-brain barrier preservation, leading to enhanced neuroprotection and blood perfusion. This strategy gives a proof of concept that neurovascular units can serve as an integrated target for ischemic stroke treatment with nanomedicines.
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Affiliation(s)
- Yifei Lu
- Key Laboratory of Smart Drug Delivery, Ministry of Education, State Key Laboratory of Medical Neurobiology, Department of Pharmaceutics, School of Pharmacy, Fudan University, Shanghai, 201203, China
- National Pharmaceutical Engineering and Research Center, China State Institute of Pharmaceutical Industry, Shanghai, 201203, China
| | - Chao Li
- Key Laboratory of Smart Drug Delivery, Ministry of Education, State Key Laboratory of Medical Neurobiology, Department of Pharmaceutics, School of Pharmacy, Fudan University, Shanghai, 201203, China
| | - Qinjun Chen
- Key Laboratory of Smart Drug Delivery, Ministry of Education, State Key Laboratory of Medical Neurobiology, Department of Pharmaceutics, School of Pharmacy, Fudan University, Shanghai, 201203, China
| | - Peixin Liu
- Key Laboratory of Smart Drug Delivery, Ministry of Education, State Key Laboratory of Medical Neurobiology, Department of Pharmaceutics, School of Pharmacy, Fudan University, Shanghai, 201203, China
| | - Qin Guo
- Key Laboratory of Smart Drug Delivery, Ministry of Education, State Key Laboratory of Medical Neurobiology, Department of Pharmaceutics, School of Pharmacy, Fudan University, Shanghai, 201203, China
| | - Yu Zhang
- Key Laboratory of Smart Drug Delivery, Ministry of Education, State Key Laboratory of Medical Neurobiology, Department of Pharmaceutics, School of Pharmacy, Fudan University, Shanghai, 201203, China
| | - Xinli Chen
- Key Laboratory of Smart Drug Delivery, Ministry of Education, State Key Laboratory of Medical Neurobiology, Department of Pharmaceutics, School of Pharmacy, Fudan University, Shanghai, 201203, China
| | - Yujie Zhang
- Key Laboratory of Smart Drug Delivery, Ministry of Education, State Key Laboratory of Medical Neurobiology, Department of Pharmaceutics, School of Pharmacy, Fudan University, Shanghai, 201203, China
| | - Wenxi Zhou
- Key Laboratory of Smart Drug Delivery, Ministry of Education, State Key Laboratory of Medical Neurobiology, Department of Pharmaceutics, School of Pharmacy, Fudan University, Shanghai, 201203, China
| | - Donghui Liang
- Key Laboratory of Smart Drug Delivery, Ministry of Education, State Key Laboratory of Medical Neurobiology, Department of Pharmaceutics, School of Pharmacy, Fudan University, Shanghai, 201203, China
| | - Yiwen Zhang
- Key Laboratory of Smart Drug Delivery, Ministry of Education, State Key Laboratory of Medical Neurobiology, Department of Pharmaceutics, School of Pharmacy, Fudan University, Shanghai, 201203, China
| | - Tao Sun
- Key Laboratory of Smart Drug Delivery, Ministry of Education, State Key Laboratory of Medical Neurobiology, Department of Pharmaceutics, School of Pharmacy, Fudan University, Shanghai, 201203, China
| | - Weigen Lu
- National Pharmaceutical Engineering and Research Center, China State Institute of Pharmaceutical Industry, Shanghai, 201203, China
| | - Chen Jiang
- Key Laboratory of Smart Drug Delivery, Ministry of Education, State Key Laboratory of Medical Neurobiology, Department of Pharmaceutics, School of Pharmacy, Fudan University, Shanghai, 201203, China
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21
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Wang Q, Hu SL, Wu YB, Niu Q, Huang YY, Wu F, Zhu XT, Fan J, Yin GY, Wan MM, Mao C, Zhou M. Multiple Drug Delivery from Mesoporous Coating Realizing Combination Therapy for Bare Metal Stents. Langmuir 2019; 35:3126-3133. [PMID: 30696247 DOI: 10.1021/acs.langmuir.8b04080] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
The simultaneous loading of multifunctional drugs has been regarded as one of the major challenges in the drug delivery system. Herein, a mesoporous silica coating was constructed on a bare metal stent surface by an evaporation-induced self-assembly method, in which both hydrophilic and hydrophobic drugs (heparin and rapamycin) were encapsulated by a one-pot method for the first time, and the release behaviors of these drugs were studied. The releasing mechanisms of these drugs were investigated in detail. Rapid release of heparin can achieve anticoagulation and endothelialization, whereas slow release of rapamycin can realize antiproliferative therapy for long term. In vitro hemocompatibility and promotion for proliferation of vein endothelial cells and the inhibition of smooth muscle cells were conducted. In vivo stent implantation results verify that the mesoporous silica coating with both heparin and rapamycin can successfully accelerate the endothelialization process and realize the antiproliferative therapy for as long as 3 months. These results indicate that this multifunctional mesoporous coating containing both hydrophilic and hydrophobic drugs might be a promising stent coating in the future.
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Affiliation(s)
- Qi Wang
- National and Local Joint Engineering Research Center of Biomedical Functional Materials, School of Chemistry and Materials Science , Nanjing Normal University , Nanjing 210097 , Jiangsu , China
| | - Shuang Long Hu
- Department of Vascular Surgery, Nanjing Drum Tower Hospital , The Affliated Hospital of Nanjing University Medical School , Nanjing 210008 , Jiangsu , China
| | - Ying Ben Wu
- National and Local Joint Engineering Research Center of Biomedical Functional Materials, School of Chemistry and Materials Science , Nanjing Normal University , Nanjing 210097 , Jiangsu , China
| | - Qian Niu
- National and Local Joint Engineering Research Center of Biomedical Functional Materials, School of Chemistry and Materials Science , Nanjing Normal University , Nanjing 210097 , Jiangsu , China
| | - Yang Yang Huang
- National and Local Joint Engineering Research Center of Biomedical Functional Materials, School of Chemistry and Materials Science , Nanjing Normal University , Nanjing 210097 , Jiangsu , China
| | - Fan Wu
- National and Local Joint Engineering Research Center of Biomedical Functional Materials, School of Chemistry and Materials Science , Nanjing Normal University , Nanjing 210097 , Jiangsu , China
| | - Xiao Tan Zhu
- National and Local Joint Engineering Research Center of Biomedical Functional Materials, School of Chemistry and Materials Science , Nanjing Normal University , Nanjing 210097 , Jiangsu , China
| | - Jin Fan
- Department of Orthopaedics , The First Affiliated Hospital of Nanjing Medical University , Nanjing 210000 , Jiangsu , China
| | - Guo Yong Yin
- Department of Orthopaedics , The First Affiliated Hospital of Nanjing Medical University , Nanjing 210000 , Jiangsu , China
| | - Mi Mi Wan
- National and Local Joint Engineering Research Center of Biomedical Functional Materials, School of Chemistry and Materials Science , Nanjing Normal University , Nanjing 210097 , Jiangsu , China
| | - Chun Mao
- National and Local Joint Engineering Research Center of Biomedical Functional Materials, School of Chemistry and Materials Science , Nanjing Normal University , Nanjing 210097 , Jiangsu , China
| | - Min Zhou
- Department of Vascular Surgery, Nanjing Drum Tower Hospital , The Affliated Hospital of Nanjing University Medical School , Nanjing 210008 , Jiangsu , China
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22
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Ijichi T, Nakazawa G, Torii S, Nagamatsu H, Yoshikawa A, Souba J, Isobe A, Hagiwara H, Ikari Y. Comparisons of early vascular reactions in biodegradable and durable polymer-based drug-eluting stents in the porcine coronary artery. PLoS One 2019; 14:e0209841. [PMID: 30629613 PMCID: PMC6328177 DOI: 10.1371/journal.pone.0209841] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2018] [Accepted: 12/12/2018] [Indexed: 11/18/2022] Open
Abstract
Current drug-eluting stents have abluminal polymer coating; however, thrombus formation in these compared with that in uniformly coated stents remains controversial. We evaluated thrombus formation and early endothelialization after using abluminal biodegradable polymer-coated sirolimus- (BP-SES), and everolimus-eluting stents (BP-EES) versus a durable polymer-coated everolimus-eluting stent (DP-EES) in an in vivo setting. BP-SES, BP-EES, and DP-EES (n = 6 each) were implanted in coronary arteries of 12 mini-pigs that were then sacrificed after 7 and 10 days. Stents were stained with hematoxylin and eosin, and a combined Verhoeff and Masson trichrome stain. Areas of fibrin deposition were digitally detected and measured with off-line morphometric software. Stents were investigated for re-endothelialization by transmission electron microscopy. At 7 days, histological analysis revealed the lowest area of fibrin deposition in BP-SES (BP-SES vs. BP-EES vs. DP-EES; 0.10 ± 0.06 mm2 vs. 0.15 ± 0.07 mm2 vs. 0.19 ± 0.06 mm2, p = 0.0004). At 10 days, the area of fibrin deposition was significantly greater in DP-EES (0.13 ± 0.04 mm2 vs. 0.14 ± 0.05 mm2 vs. 0.19 ± 0.08 mm2, p = 0.007). Endothelial cells in BP-SES demonstrated a significantly greater number of tight junctions than those in DP-EES according to by transmission electron microscopy for both days (p<0.05). Various parameters, including an inflammatory reaction and neointimal formation, were comparable among the groups at 7 and 10 days. An abluminal biodegradable polymer-coated SES showed the least fibrin deposition and greatest endothelial cell recovery at an early stage following implantation in the coronary arteries of mini-pigs.
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Affiliation(s)
- Takeshi Ijichi
- Department of Cardiology, Tokai University School of Medicine, Kanagawa, Japan
| | - Gaku Nakazawa
- Department of Cardiology, Tokai University School of Medicine, Kanagawa, Japan
- * E-mail:
| | - Sho Torii
- Department of Cardiology, Tokai University School of Medicine, Kanagawa, Japan
| | - Hirofumi Nagamatsu
- Department of Cardiology, Tokai University School of Medicine, Kanagawa, Japan
| | - Ayako Yoshikawa
- Department of Cardiology, Tokai University School of Medicine, Kanagawa, Japan
| | - Junko Souba
- TERUMO Corporation Evaluation Center, Kanagawa, Japan
| | - Atsushi Isobe
- TERUMO Corporation Evaluation Center, Kanagawa, Japan
| | | | - Yuji Ikari
- Department of Cardiology, Tokai University School of Medicine, Kanagawa, Japan
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23
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Kim YH, Her AY, Jeong MH, Kim BK, Hong SJ, Shin DH, Kim JS, Ko YG, Choi D, Hong MK, Jang Y. Impact of current smoking on 2-year clinical outcomes between durable-polymer-coated stents and biodegradable-polymer-coated stents in acute myocardial infarction after successful percutaneous coronary intervention: Data from the KAMIR. PLoS One 2018; 13:e0205046. [PMID: 30289945 PMCID: PMC6173404 DOI: 10.1371/journal.pone.0205046] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2018] [Accepted: 09/18/2018] [Indexed: 01/25/2023] Open
Abstract
Objective Data concerning the effect of current smoking on solely new-generation drug-eluting stents (DES) are limited. We investigated the impact of current smoking on 2-year clinical outcomes between durable-polymer (DP)-coated DES (zotarolimus-eluting [ZES] and everolimus eluting [EES]) and biodegradable-polymer (BP)-coated biolimus-eluting stent (BES) in acute myocardial infarction (AMI) patients after successful percutaneous coronary intervention (PCI). Methods Finally, a total of 8357 AMI patients with current smoking underwent successful PCI with new-generation DES (ZES, EES, and BES) were enrolled and divided into three groups as ZES (n = 3199), EES (n = 3987), and BES group (n = 1171). The primary endpoint was the occurrence of major adverse cardiac events (MACE) defined as all-cause death (cardiac death [CD] or non-cardiac death), recurrent AMI (re-MI), any revascularization (target lesion revascularization [TLR], target vessel revascularization [TVR], and non-TVR). The secondary endpoint was the incidence of definite or probable stent thrombosis (ST). Results The 2-year adjusted hazard ratio (HR) of MACE for ZES vs. EES (1.055; 95% confidence interval [CI], 0.843–1.321; p = 0.638), ZES vs. BES (HR, 0.885; 95% CI, 0.626–1.251; p = 0.488), EES vs. BES (HR, 0.889; 95% CI, 0.633–1.250; p = 0.499), and ZES/EES vs. BES (HR, 0.891; 95% CI, 0.648–1.126; p = 0.480) were similar. The occurrence of ST after adjustment were also comparable. In addition, the 2-year adjusted HR for all-cause death, CD, re-MI, TLR, TVR, and non-TVR were not different. Conclusions In this study, DP-DES and BP-DES showed comparable safety and efficacy during 2-year follow-up periods. Therefore, DP-DES or BP-DES are equally acceptable in AMI patients with current smoking undergoing PCI.
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Affiliation(s)
- Yong Hoon Kim
- Division of Cardiology, Department of Internal Medicine, Kangwon National University School of Medicine, Chuncheon, South Korea
- * E-mail:
| | - Ae-Young Her
- Division of Cardiology, Department of Internal Medicine, Kangwon National University School of Medicine, Chuncheon, South Korea
| | - Myung Ho Jeong
- Department of Cardiology, Cardiovascular Center, Chonnam National University Hospital, Gwangju, South Korea
| | - Byeong-Keuk Kim
- Division of Cardiology, Severance Cardiovascular Hospital, Yonsei University College of Medicine, Seoul, South Korea
| | - Sung-Jin Hong
- Division of Cardiology, Severance Cardiovascular Hospital, Yonsei University College of Medicine, Seoul, South Korea
| | - Dong-Ho Shin
- Division of Cardiology, Severance Cardiovascular Hospital, Yonsei University College of Medicine, Seoul, South Korea
| | - Jung-Sun Kim
- Division of Cardiology, Severance Cardiovascular Hospital, Yonsei University College of Medicine, Seoul, South Korea
| | - Young-Guk Ko
- Division of Cardiology, Severance Cardiovascular Hospital, Yonsei University College of Medicine, Seoul, South Korea
| | - Donghoon Choi
- Division of Cardiology, Severance Cardiovascular Hospital, Yonsei University College of Medicine, Seoul, South Korea
| | - Myeong-Ki Hong
- Division of Cardiology, Severance Cardiovascular Hospital, Yonsei University College of Medicine, Seoul, South Korea
| | - Yangsoo Jang
- Division of Cardiology, Severance Cardiovascular Hospital, Yonsei University College of Medicine, Seoul, South Korea
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24
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Abstract
A current challenge is to develop tags to precisely visualize proteins in cells by light and electron microscopy. Here, we introduce FerriTag, a genetically-encoded chemically-inducible tag for correlative light-electron microscopy. FerriTag is a fluorescent recombinant electron-dense ferritin particle that can be attached to a protein-of-interest using rapamycin-induced heterodimerization. We demonstrate the utility of FerriTag for correlative light-electron microscopy by labeling proteins associated with various intracellular structures including mitochondria, plasma membrane, and clathrin-coated pits and vesicles. FerriTagging has a good signal-to-noise ratio and a labeling resolution of approximately 10 nm. We demonstrate how FerriTagging allows nanoscale mapping of protein location relative to a subcellular structure, and use it to detail the distribution and conformation of huntingtin-interacting protein 1 related (HIP1R) in and around clathrin-coated pits.
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Affiliation(s)
- Nicholas I Clarke
- Centre for Mechanochemical Cell Biology, Warwick Medical School, Gibbet Hill Road, Coventry, CV4 7AL, UK
| | - Stephen J Royle
- Centre for Mechanochemical Cell Biology, Warwick Medical School, Gibbet Hill Road, Coventry, CV4 7AL, UK.
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25
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Bolourian A, Mojtahedi Z. Immunosuppressants produced by Streptomyces: evolution, hygiene hypothesis, tumour rapalog resistance and probiotics. Environ Microbiol Rep 2018; 10:123-126. [PMID: 29377607 DOI: 10.1111/1758-2229.12617] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/16/2017] [Accepted: 01/15/2018] [Indexed: 06/07/2023]
Abstract
Resistance to a drug and the suppression of inflammatory disorders with immunosuppressive drugs might have happened upon exposure to natural compounds during evolution. Streptomycetes are soil bacteria, but they produce therapeutic drugs. They have been reported to be the low-abundant members of mucosal microbiomes with a higher prevalence in nonhumans ingesting soil compared with humans. Their lower abundance in the human microbiome might be the representations of our current hygienic lifestyle. We suggest that the Streptomyces bacteria producing antiproliferative/immunosuppressive compounds (e.g., rapamycin and tacrolimus) contribute to the rapalog resistance of certain mucosal tumours (e.g., colon cancer) and the 'hygiene hypothesis'. If so, the shortage of exposure to these compounds in the current lifestyle might be an underlying reason for the increase of inflammatory diseases, such as inflammatory bowel diseases (IBD). An investigation on adding certain Streptomycetes (e.g., S. hygroscopicus and S. tubercidicus) to the list of probiotics against inflammatory diseases would be an interesting research area in the future.
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Affiliation(s)
- Alireza Bolourian
- School of Life Sciences, University of Nevada, Las Vegas, NV 89154, USA
| | - Zahra Mojtahedi
- Institute for Cancer Research, Shiraz University of Medical Sciences, Shiraz, Iran
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26
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Bedair TM, Kang SN, Joung YK, Han DK. A Promising Approach for Improving the Coating Stability and In Vivo Performance of Biodegradable Polymer-Coated Sirolimus-Eluting Stent. J Biomed Nanotechnol 2018; 12:2015-28. [PMID: 29364616 DOI: 10.1166/jbn.2016.2305] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Several developments are in progress for improving the performance of drug-eluting stents (DESs) including use of biodegradable polymers, polymer-free DES, fully bioabsorbable stents, and so on. The commercially available DESs still suffer from polymer defects that could affect the performance of a DES through a series of adverse events such as coating delamination and/or peeling-off that lead to non-uniform local drug distribution, restenosis, and thrombosis. The goal of this work was to enhance the stability of drug-in-polymer matrix coating on a stent metal surface through surface modification. The cobalt–chromium (Co–Cr) surface was chemically modified using poly(dopamine) (PDA) nano-coating and poly(L-lactide) (PLLA) nano-brush in order to be applied to a biodegradable polymer-coated DES. The biodegradable polymer loaded with sirolimus was coated using an ultrasonic spray coating instrument. The coating morphology on all samples showed a very smooth and uniform coating. The stability of the coating was evaluated for 2 months under the circulation system in which the drug-in-polymer coating on the PLLA brush-modified stent presented the most stable coating behavior as compared to other samples. The in vitro sirolimus release study from both unmodified and modified stents was studied in phosphate-buffered saline (PBS), and the modified stents showed slower sirolimus release profile as compared to unmodified stents. In vivo study was performed in a porcine coronary artery injury model for 28 days. The percentage of in-stent restenosis area (ISR) for PLLA brush-modified sirolimus-eluting stent (SES) decreased significantly as compared to unmodified SES and bare metal stent (BMS). This study demonstrated that the modification of stent surface using PLLA brushes affects in vitro and in vivo performance effectively to be applied for biodegradable polymercoated DES.
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Aliper A, Jellen L, Cortese F, Artemov A, Karpinsky-Semper D, Moskalev A, Swick AG, Zhavoronkov A. Towards natural mimetics of metformin and rapamycin. Aging (Albany NY) 2017; 9:2245-2268. [PMID: 29165314 PMCID: PMC5723685 DOI: 10.18632/aging.101319] [Citation(s) in RCA: 62] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2017] [Accepted: 11/02/2017] [Indexed: 12/14/2022]
Abstract
Aging is now at the forefront of major challenges faced globally, creating an immediate need for safe, widescale interventions to reduce the burden of chronic disease and extend human healthspan. Metformin and rapamycin are two FDA-approved mTOR inhibitors proposed for this purpose, exhibiting significant anti-cancer and anti-aging properties beyond their current clinical applications. However, each faces issues with approval for off-label, prophylactic use due to adverse effects. Here, we initiate an effort to identify nutraceuticals-safer, naturally-occurring compounds-that mimic the anti-aging effects of metformin and rapamycin without adverse effects. We applied several bioinformatic approaches and deep learning methods to the Library of Integrated Network-based Cellular Signatures (LINCS) dataset to map the gene- and pathway-level signatures of metformin and rapamycin and screen for matches among over 800 natural compounds. We then predicted the safety of each compound with an ensemble of deep neural network classifiers. The analysis revealed many novel candidate metformin and rapamycin mimetics, including allantoin and ginsenoside (metformin), epigallocatechin gallate and isoliquiritigenin (rapamycin), and withaferin A (both). Four relatively unexplored compounds also scored well with rapamycin. This work revealed promising candidates for future experimental validation while demonstrating the applications of powerful screening methods for this and similar endeavors.
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Affiliation(s)
- Alexander Aliper
- Insilico Medicine, Inc, Research Department, Baltimore, MD 21218, USA
| | - Leslie Jellen
- Insilico Medicine, Inc, Research Department, Baltimore, MD 21218, USA
| | - Franco Cortese
- Biogerontology Research Foundation, Research Department, Oxford, United Kingdom
- Department of Biomedical and Molecular Science, Queen's University School of Medicine, Queen's University, Kingston, ON K7L 3N6, Canada
| | - Artem Artemov
- Insilico Medicine, Inc, Research Department, Baltimore, MD 21218, USA
| | | | - Alexey Moskalev
- Laboratory of Molecular Radiobiology and Gerontology, Institute of Biology of Komi Science Center of Ural Branch of Russian Academy of Sciences, Syktyvkar, 167982, Russia
| | | | - Alex Zhavoronkov
- Insilico Medicine, Inc, Research Department, Baltimore, MD 21218, USA
- Biogerontology Research Foundation, Research Department, Oxford, United Kingdom
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Abstract
Enzyme prodrug therapies hold potential as a targeted treatment option for cancer patients. However, off-target effects can be detrimental to patient health and represent a safety concern. This concern can be alleviated by including a failsafe mechanism that can abort the therapy in healthy cells. This feature can be included in enzyme prodrug therapies by use of conditional degradation tags, which degrade the protein unless stabilized. We call this process Degradation-Directed Enzyme Prodrug Therapy (DDEPT). Herein, we use traceless shielding (TShld), a mechanism that degrades a protein of interest unless it is rescued by the addition of rapamycin, to test this concept. We demonstrated that TShld rapidly yielded only native protein products within 1h after rapamycin addition. The rapid protection phenotype of TShld was further adapted to rescue yeast cytosine deaminase, a prodrug converting enzyme. As expected, cell viability was adversely affected only in the presence of both 5-fluorocytosine (5-FC) and rapamycin. We believe that the DDEPT system can be easily combined with other targeting strategies to further increase the safety of prodrug therapies.
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Affiliation(s)
- Andrew S Gaynor
- Department of Chemical and Biomolecular Engineering, University of Delaware, Newark, USA
| | - Wilfred Chen
- Department of Chemical and Biomolecular Engineering, University of Delaware, Newark, USA.
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Affiliation(s)
- Brendan D Manning
- From the Department of Genetics and Complex Diseases, Harvard T.H. Chan School of Public Health, Boston
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30
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Thapa RK, Byeon JH, Choi HG, Yong CS, Kim JO. PEGylated lipid bilayer-wrapped nano-graphene oxides for synergistic co-delivery of doxorubicin and rapamycin to prevent drug resistance in cancers. Nanotechnology 2017; 28:295101. [PMID: 28614069 DOI: 10.1088/1361-6528/aa7997] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Nano-graphene oxide (nGO) is a carbon allotrope studied for its potential as carrier for chemotherapeutic delivery and its photoablation effects. However, interaction of nGO with blood components and the subsequent toxicities warrant a hybrid system for effective cancer drug delivery. Combination chemotherapy aids in effective cancer treatment and prevention of drug resistance. Therefore, in this study, we attempted to prepare polyethylene glycosylated (PEGylated) lipid bilayer-wrapped nGO co-loaded with doxorubicin (DOX) and rapamycin (RAPA), GOLDR, for the prevention and treatment of resistant cancers. Our results revealed a stable GOLDR formulation with appropriate particle size (∼170 nm), polydispersity (∼0.19) and drug loading. Free drug combination (DOX and RAPA) presented synergistic anticancer effects in MDA-MB-231, MCF-7, and BT474 cells. Treatment with GOLDR formulation maintained this synergism in treated cancer cells, which was further enhanced by the near infrared (NIR) laser irradiation-induced photothermal effects of nGO. Higher chromatin condensation and apoptotic body formation, and enhanced protein expression of apoptosis-related markers (Bax, p53, p21, and c-caspase 3) following GOLDR treatment in the presence of NIR laser treatment clearly suggests its superiority in effective chemo-photothermal therapy of resistant cancers. The hybrid nanosystem that we developed provides a basis for the effective use of GOLDR treatment in the prevention and treatment of resistant cancer types.
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Affiliation(s)
- Raj Kumar Thapa
- College of Pharmacy, Yeungnam University, Gyeongsan 38541, Republic of Korea
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Chae IH, Yoon CH, Park JJ, Oh IY, Suh JW, Cho YS, Youn TJ, Choi DJ. Comparison of Drug-Eluting Balloon Followed by Bare Metal Stent with Drug-Eluting Stent for Treatment of de Novo Lesions: Randomized, Controlled, Single-Center Clinical Trial. J Korean Med Sci 2017; 32:933-941. [PMID: 28480650 PMCID: PMC5426232 DOI: 10.3346/jkms.2017.32.6.933] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/10/2016] [Accepted: 03/19/2017] [Indexed: 01/03/2023] Open
Abstract
The combined use of a drug-eluting balloon (DEB) and a bare metal stent (BMS) for the treatment of de novo non-small vessel coronary artery diseases (CAD) remains to be evaluated. We investigated the efficacy of a sequential treatment using a DEB together with a BMS implantation in comparison to a zotarolimus-eluting stent (ZES). This study was a prospective, randomized, open-label study. We designed it to demonstrate the non-inferiority of a sequential treatment using a DEB first followed by a BMS (DEB + BMS) compared with the use of a ZES. The primary endpoint was in-segment late loss (LL) at 9 months measured by quantitative coronary angiography (QCA). A total of 180 patients were enrolled in the study. The 9-month follow-up angiography was performed in 72 patients with DEB + BMS and 74 patients with ZES. When comparing the DEB + BMS results with the ZES ones, LL was 0.50 ± 0.46 mm in DEB + BMS patients vs. 0.21 ± 0.44 mm in ZES patients (P < 0.001). The mean difference of the LL was 0.31 mm, which was larger than the prespecified non-inferiority margin of 0.19 mm, and the 2-sided 95% confidence interval was 0.15-0.48. The clinical outcomes were not significantly different. In conclusion, the DEB + BMS strategy is inferior to the ZES one in terms of the LL result at 9 months. The DEB strategy for de novo coronary artery lesions needs to be improved for it to become an alternative treatment option.
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Affiliation(s)
- In Ho Chae
- Department of Internal Medicine, Cardiovascular Center, Seoul National University Bundang Hospital, Seongnam, Korea
| | - Chang Hwan Yoon
- Department of Internal Medicine, Cardiovascular Center, Seoul National University Bundang Hospital, Seongnam, Korea.
| | - Jin Joo Park
- Department of Internal Medicine, Cardiovascular Center, Seoul National University Bundang Hospital, Seongnam, Korea
| | - Il Young Oh
- Department of Internal Medicine, Cardiovascular Center, Seoul National University Bundang Hospital, Seongnam, Korea
| | - Jung Won Suh
- Department of Internal Medicine, Cardiovascular Center, Seoul National University Bundang Hospital, Seongnam, Korea
| | - Young Seok Cho
- Department of Internal Medicine, Cardiovascular Center, Seoul National University Bundang Hospital, Seongnam, Korea
| | - Tae Jin Youn
- Department of Internal Medicine, Cardiovascular Center, Seoul National University Bundang Hospital, Seongnam, Korea
| | - Dong Ju Choi
- Department of Internal Medicine, Cardiovascular Center, Seoul National University Bundang Hospital, Seongnam, Korea
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Lee CH, Hsieh MJ, Chang SH, Chiang CL, Fan CL, Liu SJ, Chen WJ, Wang CJ, Hsu MY, Hung KC, Chou CC, Chang PC. Biodegradable Cable-Tie Rapamycin-eluting Stents. Sci Rep 2017; 7:111. [PMID: 28273914 PMCID: PMC5427919 DOI: 10.1038/s41598-017-00131-w] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2016] [Accepted: 02/08/2017] [Indexed: 12/03/2022] Open
Abstract
"Cable-tie" type biodegradable stents with drug-eluting nanofiber were developed to treat rabbit denuded arteries in this study. Biodegradable stents were fabricated using poly-L-lactide film following being cut and rolled into a cable-tie type stent. Additionally, drug-eluting biodegradable nanofiber tubes were electrospun from a solution containing poly (lactic-co-glycolic acid), rapamycin, and hexafluoroisopropanol, and then mounted onto the stents. The fabricated rapamycin-eluting cable-tie stents exhibited excellent mechanical properties on evaluation of compression test and collapse pressure, and less than 8% weight loss following being immersed in phosphate-buffered saline for 16 weeks. Furthermore, the biodegradable stents delivered high rapamycin concentrations for over 4 weeks and achieved substantial reductions in intimal hyperplasia associated with elevated heme oxygenase-1 and calponin level on the denuded rabbit arteries during 6 months of follow-up. The drug-eluting cable-tie type stents developed in this study might have high potential impacts for the local drug delivery to treat various vascular diseases.
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Affiliation(s)
- Cheng-Hung Lee
- Division of Cardiology, Department of Internal Medicine, Chang Gung Memorial Hospital-Linkou, Chang Gung University College of Medicine, Taipei, Taiwan
| | - Ming-Jer Hsieh
- Division of Cardiology, Department of Internal Medicine, Chang Gung Memorial Hospital-Linkou, Chang Gung University College of Medicine, Taipei, Taiwan
| | - Shang-Hung Chang
- Division of Cardiology, Department of Internal Medicine, Chang Gung Memorial Hospital-Linkou, Chang Gung University College of Medicine, Taipei, Taiwan
| | - Chang-Lin Chiang
- Department of Mechanical Engineering, Chang Gung University, Taoyuan, Taiwan
| | - Ching-Lung Fan
- Department of Mechanical Engineering, Chang Gung University, Taoyuan, Taiwan
| | - Shih-Jung Liu
- Department of Mechanical Engineering, Chang Gung University, Taoyuan, Taiwan.
- Department of Orthopedic Surgery, Chang Gung Memorial Hospital-Linkou, Taoyuan, Taiwan.
| | - Wei-Jan Chen
- Division of Cardiology, Department of Internal Medicine, Chang Gung Memorial Hospital-Linkou, Chang Gung University College of Medicine, Taipei, Taiwan
| | - Chao-Jan Wang
- Department of Medical Imaging and Intervention, Chang Gung Memorial Hospital-Linkou, Taoyuan, Taiwan
| | - Ming-Yi Hsu
- Department of Medical Imaging and Intervention, Chang Gung Memorial Hospital-Linkou, Taoyuan, Taiwan
| | - Kuo-Chun Hung
- Division of Cardiology, Department of Internal Medicine, Chang Gung Memorial Hospital-Linkou, Chang Gung University College of Medicine, Taipei, Taiwan
| | - Chung-Chuan Chou
- Division of Cardiology, Department of Internal Medicine, Chang Gung Memorial Hospital-Linkou, Chang Gung University College of Medicine, Taipei, Taiwan
| | - Po-Cheng Chang
- Division of Cardiology, Department of Internal Medicine, Chang Gung Memorial Hospital-Linkou, Chang Gung University College of Medicine, Taipei, Taiwan
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Yoo YJ, Kim H, Park SR, Yoon YJ. An overview of rapamycin: from discovery to future perspectives. J Ind Microbiol Biotechnol 2016; 44:537-553. [PMID: 27613310 DOI: 10.1007/s10295-016-1834-7] [Citation(s) in RCA: 65] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2016] [Accepted: 08/22/2016] [Indexed: 12/17/2022]
Abstract
Rapamycin is an immunosuppressive metabolite produced from several actinomycete species. Besides its immunosuppressive activity, rapamycin and its analogs have additional therapeutic potentials, including antifungal, antitumor, neuroprotective/neuroregenerative, and lifespan extension activities. The core structure of rapamycin is derived from (4R,5R)-4,5-dihydrocyclohex-1-ene-carboxylic acid that is extended by polyketide synthase. The resulting linear polyketide chain is cyclized by incorporating pipecolate and further decorated by post-PKS modification enzymes. Herein, we review the discovery and biological activities of rapamycin as well as its mechanism of action, mechanistic target, biosynthesis, and regulation. In addition, we introduce the many efforts directed at enhancing the production of rapamycin and generating diverse analogs and also explore future perspectives in rapamycin research. This review will also emphasize the remarkable pilot studies on the biosynthesis and production improvement of rapamycin by Dr. Demain, one of the world's distinguished scientists in industrial microbiology and biotechnology.
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Affiliation(s)
- Young Ji Yoo
- Department of Chemistry and Nanoscience, Ewha Womans University, Seoul, 120-750, Republic of Korea
| | - Hanseong Kim
- Department of Biological Chemistry, University of Michigan, Ann Arbor, MI, 48109, USA
| | - Sung Ryeol Park
- Natural Products Discovery Institute, The Baruch S. Blumberg Institute, Hepatitis B Foundation, Doylestown, PA, 18902, USA.
| | - Yeo Joon Yoon
- Department of Chemistry and Nanoscience, Ewha Womans University, Seoul, 120-750, Republic of Korea.
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Wang Z, Meenach SA. Synthesis and Characterization of Nanocomposite Microparticles (nCmP) for the Treatment of Cystic Fibrosis-Related Infections. Pharm Res 2016; 33:1862-72. [PMID: 27091030 PMCID: PMC4945441 DOI: 10.1007/s11095-016-1921-5] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2015] [Accepted: 04/04/2016] [Indexed: 01/08/2023]
Abstract
PURPOSE Pulmonary antibiotic delivery is recommended as maintenance therapy for cystic fibrosis (CF) patients who experience chronic infections. However, abnormally thick and sticky mucus present in the respiratory tract of CF patients impairs mucus penetration and limits the efficacy of inhaled antibiotics. To overcome the obstacles of pulmonary antibiotic delivery, we have developed nanocomposite microparticles (nCmP) for the inhalation application of antibiotics in the form of dry powder aerosols. METHODS Azithromycin-loaded and rapamycin-loaded polymeric nanoparticles (NP) were prepared via nanoprecipitation and nCmP were prepared by spray drying and the physicochemical characteristics were evaluated. RESULTS The nanoparticles were 200 nm in diameter both before loading into and after redispersion from nCmP. The NP exhibited smooth, spherical morphology and the nCmP were corrugated spheres about 1 μm in diameter. Both drugs were successfully encapsulated into the NP and were released in a sustained manner. The NP were successfully loaded into nCmP with favorable encapsulation efficacy. All materials were stable at manufacturing and storage conditions and nCmP were in an amorphous state after spray drying. nCmP demonstrated desirable aerosol dispersion characteristics, allowing them to deposit into the deep lung regions for effective drug delivery. CONCLUSIONS The described nCmP have the potential to overcome mucus-limited pulmonary delivery of antibiotics.
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Affiliation(s)
- Zimeng Wang
- Department of Chemical Engineering, University of Rhode Island, 202 Crawford Hall, 16 Greenhouse Road, Kingston, RI, 02881, USA
| | - Samantha A Meenach
- Department of Chemical Engineering, University of Rhode Island, 202 Crawford Hall, 16 Greenhouse Road, Kingston, RI, 02881, USA.
- Department of Biomedical and Pharmaceutical Sciences, University of Rhode Island, Kingston, RI, 02881, USA.
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35
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Matsumoto CS, Almeida LO, Guimarães DM, Martins MD, Papagerakis P, Papagerakis S, Leopoldino AM, Castilho RM, Squarize CH. PI3K-PTEN dysregulation leads to mTOR-driven upregulation of the core clock gene BMAL1 in normal and malignant epithelial cells. Oncotarget 2016; 7:42393-42407. [PMID: 27285754 PMCID: PMC5173143 DOI: 10.18632/oncotarget.9877] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2016] [Accepted: 05/19/2016] [Indexed: 01/23/2023] Open
Abstract
Dysfunctional clock signaling is observed in a variety of pathological conditions. Many members of the clock gene family are upregulated in tumor cells. Here, we explored the consequences of a commonly disrupted signaling pathway in head and neck cancer on the regulation of circadian clock genes. PTEN is a key molecular controller of the PI3K signaling, and loss of PTEN function is often observed in a variety of cancers. Our main goal was to determine whether PTEN regulates circadian clock signaling. We found that oxidation-driven loss of PTEN function resulted in the activation of mTOR signaling and activation of the core clock protein BMAL1 (also known as ARNTL). The PTEN-induced BMAL1 upregulation was further confirmed using small interference RNA targeting PTEN, and in vivo conditional depletion of PTEN from the epidermis. We observed that PTEN-driven accumulation of BMAL1 was mTOR-mediated and that administration of Rapamycin, a specific mTOR inhibitor, resulted in in vivo rescue of normal levels of BMAL1. Accumulation of BMAL1 by deletion of PER2, a Period family gene, was also rescued upon in vivo administration of mTOR inhibitor. Notably, BMAL1 regulation requires mTOR regulatory protein Raptor and Rictor. These findings indicate that mTORC1 and mTORC2 complex plays a critical role in controlling BMAL1, establishing a connection between PI3K signaling and the regulation of circadian rhythm, ultimately resulting in deregulated BMAL1 in tumor cells with disrupted PI3K signaling.
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Affiliation(s)
- Camila S. Matsumoto
- Laboratory of Epithelial Biology, Department of Periodontics and Oral Medicine, University of Michigan School of Dentistry, Ann Arbor, MI, USA
- Department of Clinical Analysis, Toxicology and Bromatology, School of Pharmacy, University of Sao Paulo, Ribeirao Preto, SP, Brazil
| | - Luciana O. Almeida
- Laboratory of Epithelial Biology, Department of Periodontics and Oral Medicine, University of Michigan School of Dentistry, Ann Arbor, MI, USA
| | - Douglas M. Guimarães
- Laboratory of Epithelial Biology, Department of Periodontics and Oral Medicine, University of Michigan School of Dentistry, Ann Arbor, MI, USA
- Department of Oral Pathology, School of Dentistry, University of Sao Paulo, SP, Brazil
| | - Manoela D. Martins
- Laboratory of Epithelial Biology, Department of Periodontics and Oral Medicine, University of Michigan School of Dentistry, Ann Arbor, MI, USA
- Department of Oral Pathology, School of Dentistry, Federal University of Rio Grande do Sul, Porto Alegre, RS, Brazil
| | - Petros Papagerakis
- Department of Orthodontics and Pediatric Dentistry, School of Dentistry, University of Michigan, Ann Arbor, MI, USA
- Center for Organogenesis, University of Michigan, Ann Arbor, MI, USA
| | - Silvana Papagerakis
- Comprehensive Cancer Center, University of Michigan, Ann Arbor, MI, USA
- Department of Otolaryngology, Medical School, University of Michigan, Ann Arbor, MI, USA
| | - Andreia M. Leopoldino
- Department of Clinical Analysis, Toxicology and Bromatology, School of Pharmacy, University of Sao Paulo, Ribeirao Preto, SP, Brazil
| | - Rogerio M. Castilho
- Laboratory of Epithelial Biology, Department of Periodontics and Oral Medicine, University of Michigan School of Dentistry, Ann Arbor, MI, USA
| | - Cristiane H. Squarize
- Laboratory of Epithelial Biology, Department of Periodontics and Oral Medicine, University of Michigan School of Dentistry, Ann Arbor, MI, USA
- Comprehensive Cancer Center, University of Michigan, Ann Arbor, MI, USA
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Pang X, Wang J, Tan X, Guo F, Lei M, Ma M, Yu M, Tan F, Li N. Dual-Modal Imaging-Guided Theranostic Nanocarriers Based on Indocyanine Green and mTOR Inhibitor Rapamycin. ACS Appl Mater Interfaces 2016; 8:13819-13829. [PMID: 27182890 DOI: 10.1021/acsami.6b04010] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
The development of treatment protocols that resulted in a complete response to photothermal therapy (PTT) was usually hampered by uneven heat distribution and low effectiveness. Here, we reported an NIR fluorescence and photoacoustic dual-modal imaging-guided active targeted thermal sensitive liposomes (TSLs) based on the photothermal therapy agent Indocyanine green (ICG) and antiangiogenesis agent Rapamycin (RAPA) to realize enhanced therapeutic and diagnostic functions. As expected, the in vitro drug release studies exhibited the satisfactory result of drug released from the TSLs under hyperthermia conditions induced by NIR stimulation. The in vitro cellular studies confirmed that the FA-ICG/RAPA-TSLs plus NIR laser exhibited efficient drug accumulation and cytotoxicity in tumor cells and epithelial cells. After 24 h intravenous injection of FA-ICG/RAPA-TSLs, the margins of tumor and normal tissue were accurately identified via the in vivo NIR fluorescence and photoacoustic dual-modal imaging. In addition, FA-ICG/RAPA-TSLs combined with NIR irradiation treated tumor-bearing nude mice inhibited tumor growth to a great extent and possessed much lower side effects to normal organs. All detailed evidence suggested that the theranostic TSLs which were capable of enhancing the therapeutic index might be a suitable drug delivery system for dual-modal imaging-guided therapeutic tools for diagnostics as well as the treatment of tumors.
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Affiliation(s)
- Xiaojuan Pang
- Tianjin Key Laboratory of Drug Delivery & High-Efficiency, School of Pharmaceutical Science and Technology, Tianjin University , Tianjin 300072, People's Republic of China
| | - Jinping Wang
- Tianjin Key Laboratory of Drug Delivery & High-Efficiency, School of Pharmaceutical Science and Technology, Tianjin University , Tianjin 300072, People's Republic of China
| | - Xiaoxiao Tan
- Tianjin Key Laboratory of Drug Delivery & High-Efficiency, School of Pharmaceutical Science and Technology, Tianjin University , Tianjin 300072, People's Republic of China
| | - Fang Guo
- Tianjin Key Laboratory of Drug Delivery & High-Efficiency, School of Pharmaceutical Science and Technology, Tianjin University , Tianjin 300072, People's Republic of China
| | - Mingzhu Lei
- Tianjin Key Laboratory of Drug Delivery & High-Efficiency, School of Pharmaceutical Science and Technology, Tianjin University , Tianjin 300072, People's Republic of China
| | - Man Ma
- Tianjin Key Laboratory of Drug Delivery & High-Efficiency, School of Pharmaceutical Science and Technology, Tianjin University , Tianjin 300072, People's Republic of China
| | - Meng Yu
- Tianjin Key Laboratory of Drug Delivery & High-Efficiency, School of Pharmaceutical Science and Technology, Tianjin University , Tianjin 300072, People's Republic of China
| | - Fengping Tan
- Tianjin Key Laboratory of Drug Delivery & High-Efficiency, School of Pharmaceutical Science and Technology, Tianjin University , Tianjin 300072, People's Republic of China
| | - Nan Li
- Tianjin Key Laboratory of Drug Delivery & High-Efficiency, School of Pharmaceutical Science and Technology, Tianjin University , Tianjin 300072, People's Republic of China
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Lim KS, Park JK, Jeong MH, Bae IH, Nah JW, Park DS, Kim JM, Kim JH, Lee SY, Jang EJ, Jang S, Kim HK, Sim DS, Park KH, Hong YJ, Ahn Y, Kang JC. Effect of stents coated with a combination of sirolimus and alpha-lipoic acid in a porcine coronary restenosis model. J Mater Sci Mater Med 2016; 27:66. [PMID: 26886814 DOI: 10.1007/s10856-015-5622-0] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/06/2015] [Accepted: 11/05/2015] [Indexed: 06/05/2023]
Abstract
The aim of this study was to evaluate antiproliferative sirolimus- and antioxidative alpha-lipoic acid (ALA)-eluting stents using biodegradable polymer [poly-L-lactic acid (PLA)] in a porcine coronary overstretch restenosis model. Forty coronary arteries of 20 pigs were randomized into four groups in which the coronary arteries had a bare metal stent (BMS, n = 10), ALA-eluting stent with PLA (AES, n = 10), sirolimus-eluting stent with PLA (SES, n = 10), or sirolimus- and ALA-eluting stent with PLA (SAS, n = 10). A histopathological analysis was performed 28 days after the stenting. The ALA and sirolimus released slowly over 30 days. There were no significant differences between groups in the injury or inflammation score; however, there were significant differences in the percent area of stenosis (56.2 ± 11.78% in BMS vs. 51.5 ± 12.20% in AES vs. 34.7 ± 7.23% in SES vs. 28.7 ± 7.30% in SAS, P < 0.0001) and fibrin score [1.0 (range 1.0-1.0) in BMS vs. 1.0 (range 1.0-1.0) in AES vs. 2.0 (range 2.0-2.0) in SES vs. 2.0 (range 2.0-2.0) in SAS, P < 0.0001] between the four groups. The percent area of stenosis based on micro-computed tomography corresponded with the restenosis rates based on histopathological stenosis in different proportions in the four groups (54.8 ± 7.88% in BMS vs. 50.4 ± 14.87% in AES vs. 34.5 ± 7.22% in SES vs. 28.9 ± 7.22% in SAS, P < 0.05). SAS showed a better neointimal inhibitory effect than BMS, AES, and SES at 1 month after stenting in a porcine coronary restenosis model. Therefore, SAS with PLA can be a useful drug combination for coronary stent coating to suppress neointimal hyperplasia.
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Affiliation(s)
- Kyung Seob Lim
- Korea Cardiovascular Stent Institute, Jangsung, Korea
- Cardiovascular Convergence Research Center Nominated by Korea Ministry of Health and Welfare, Gwangju, Korea
- Cardiovascular Research Center, Chonnam National University Hospital, 671, Dong-gu, Gwangju, 501-757, Korea
| | - Jun-Kyu Park
- Department of Polymer Science and Engineering, Sunchon National University, Sunchon, Korea
| | - Myung Ho Jeong
- Korea Cardiovascular Stent Institute, Jangsung, Korea.
- Cardiovascular Convergence Research Center Nominated by Korea Ministry of Health and Welfare, Gwangju, Korea.
- Cardiovascular Research Center, Chonnam National University Hospital, 671, Dong-gu, Gwangju, 501-757, Korea.
- Regeneromics Research Center, Chonnam National University, Gwangju, Korea.
| | - In-Ho Bae
- Korea Cardiovascular Stent Institute, Jangsung, Korea
- Cardiovascular Convergence Research Center Nominated by Korea Ministry of Health and Welfare, Gwangju, Korea
| | - Jae-Woon Nah
- Department of Polymer Science and Engineering, Sunchon National University, Sunchon, Korea
| | - Dae Sung Park
- Cardiovascular Convergence Research Center Nominated by Korea Ministry of Health and Welfare, Gwangju, Korea
- Cardiovascular Research Center, Chonnam National University Hospital, 671, Dong-gu, Gwangju, 501-757, Korea
| | - Jong Min Kim
- Cardiovascular Convergence Research Center Nominated by Korea Ministry of Health and Welfare, Gwangju, Korea
- Cardiovascular Research Center, Chonnam National University Hospital, 671, Dong-gu, Gwangju, 501-757, Korea
| | - Jung Ha Kim
- Cardiovascular Convergence Research Center Nominated by Korea Ministry of Health and Welfare, Gwangju, Korea
- Cardiovascular Research Center, Chonnam National University Hospital, 671, Dong-gu, Gwangju, 501-757, Korea
| | - So Youn Lee
- Korea Cardiovascular Stent Institute, Jangsung, Korea
- Cardiovascular Convergence Research Center Nominated by Korea Ministry of Health and Welfare, Gwangju, Korea
| | - Eun Jae Jang
- Korea Cardiovascular Stent Institute, Jangsung, Korea
- Cardiovascular Convergence Research Center Nominated by Korea Ministry of Health and Welfare, Gwangju, Korea
| | - Suyoung Jang
- Cardiovascular Convergence Research Center Nominated by Korea Ministry of Health and Welfare, Gwangju, Korea
- Cardiovascular Research Center, Chonnam National University Hospital, 671, Dong-gu, Gwangju, 501-757, Korea
| | - Hyun Kuk Kim
- Cardiovascular Convergence Research Center Nominated by Korea Ministry of Health and Welfare, Gwangju, Korea
- Cardiovascular Research Center, Chonnam National University Hospital, 671, Dong-gu, Gwangju, 501-757, Korea
| | - Doo Sun Sim
- Cardiovascular Convergence Research Center Nominated by Korea Ministry of Health and Welfare, Gwangju, Korea
- Cardiovascular Research Center, Chonnam National University Hospital, 671, Dong-gu, Gwangju, 501-757, Korea
| | - Keun-Ho Park
- Cardiovascular Convergence Research Center Nominated by Korea Ministry of Health and Welfare, Gwangju, Korea
- Cardiovascular Research Center, Chonnam National University Hospital, 671, Dong-gu, Gwangju, 501-757, Korea
| | - Young Joon Hong
- Cardiovascular Convergence Research Center Nominated by Korea Ministry of Health and Welfare, Gwangju, Korea
- Cardiovascular Research Center, Chonnam National University Hospital, 671, Dong-gu, Gwangju, 501-757, Korea
| | - Youngkeun Ahn
- Cardiovascular Convergence Research Center Nominated by Korea Ministry of Health and Welfare, Gwangju, Korea
- Cardiovascular Research Center, Chonnam National University Hospital, 671, Dong-gu, Gwangju, 501-757, Korea
| | - Jung Chaee Kang
- Cardiovascular Convergence Research Center Nominated by Korea Ministry of Health and Welfare, Gwangju, Korea
- Cardiovascular Research Center, Chonnam National University Hospital, 671, Dong-gu, Gwangju, 501-757, Korea
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Fuchsberger K, Binder K, Burkhardt C, Freudigmann C, Herrmann M, Stelzle M. Electrochemical etching of micro-pores in medical grade cobalt-chromium alloy as reservoirs for drug eluting stents. J Mater Sci Mater Med 2016; 27:47. [PMID: 26758894 DOI: 10.1007/s10856-015-5660-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/28/2015] [Accepted: 12/28/2015] [Indexed: 06/05/2023]
Abstract
Drug eluting stents (DES) have shown efficacy in reducing restenosis after angioplasty followed by application of a coronary stent. However, polymer matrices typically used for immobilizing drugs on the stent surface may cause irritation and have limited drug loading capacity. In contrast, drug loading into micro- or nanopores created within the stent material could avoid these problems. We present a technology based on electrochemically induced pitting corrosion to form pores in medical grade steel, followed by loading with rapamycin. This process is applied to pore formation and drug loading in coronary stents consisting of L605 medical steel. Sustained release of the drug over 28 days at rates comparable to established DES was demonstrated. This technology is capable of creating pores with well-defined pore size and filling of these pores by a drug employing a crystallization process thus completely avoiding polymer matrices to immobilize drugs. Electrochemically induced pitting corrosion provides a generic means to introduce micro-pores suitable as drug reservoirs into medical grade steel without the need for any further matrix material. Further research will expand these findings to other materials and types of implants that could benefit from the additional function of drug release and/or improved implant/tissue integration.
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Affiliation(s)
- Kai Fuchsberger
- NMI Natural and Medical Sciences Institute at the University of Tübingen, Reutlingen, Germany
| | - Karoline Binder
- NMI Natural and Medical Sciences Institute at the University of Tübingen, Reutlingen, Germany
| | - Claus Burkhardt
- NMI Natural and Medical Sciences Institute at the University of Tübingen, Reutlingen, Germany
| | - Christian Freudigmann
- NMI Natural and Medical Sciences Institute at the University of Tübingen, Reutlingen, Germany
| | - Markus Herrmann
- NMI Natural and Medical Sciences Institute at the University of Tübingen, Reutlingen, Germany
| | - Martin Stelzle
- NMI Natural and Medical Sciences Institute at the University of Tübingen, Reutlingen, Germany.
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Li CY, Wang YJ, Huang SW, Cheng CS, Wang HC. Replication of the Shrimp Virus WSSV Depends on Glutamate-Driven Anaplerosis. PLoS One 2016; 11:e0146902. [PMID: 26751681 PMCID: PMC4709008 DOI: 10.1371/journal.pone.0146902] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2015] [Accepted: 12/23/2015] [Indexed: 12/14/2022] Open
Abstract
Infection with the white spot syndrome virus (WSSV) induces a metabolic shift in shrimp that resembles the "Warburg effect" in mammalian cells. This effect is triggered via activation of the PI3K-Akt-mTOR pathway, and it is usually accompanied by the activation of other metabolic pathways that provide energy and direct the flow of carbon and nitrogen. Here we show that unlike the glutamine metabolism (glutaminolysis) seen in most cancer cells to double deaminate glutamine to produce glutamate and the TCA cycle intermediate α-ketoglutarate (α-KG), at the WSSV genome replication stage (12 hpi), although glutaminase (GLS) expression was upregulated, only glutamate was taken up by the hemocytes of WSSV-infected shrimp. At the same time, we observed an increase in the activity of the two enzymes that convert glutamate to α-KG, glutamate dehydrogenase (GDH) and aspartate aminotransferase (ASAT). α-ketoglutarate concentration was also increased. A series of inhibition experiments suggested that the up-regulation of GDH is regulated by mTORC2, and that the PI3K-mTORC1 pathway is not involved. Suppression of GDH and ASAT by dsRNA silencing showed that both of these enzymes are important for WSSV replication. In GDH-silenced shrimp, direct replenishment of α-KG rescued both ATP production and WSSV replication. From these results, we propose a model of glutamate-driven anaplerosis that fuels the TCA cycle via α-KG and ultimately supports WSSV replication.
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Affiliation(s)
- Chun-Yuan Li
- Institute of Biotechnology, College of Bioscience and Biotechnology, National Cheng Kung University, Tainan, Taiwan
| | - Yi-Jan Wang
- Institute of Biotechnology, College of Bioscience and Biotechnology, National Cheng Kung University, Tainan, Taiwan
| | - Shiao-Wei Huang
- Department of Life Science, College of Life Science, National Taiwan University, Taipei, Taiwan
| | - Cheng-Shun Cheng
- Institute of Biotechnology, College of Bioscience and Biotechnology, National Cheng Kung University, Tainan, Taiwan
| | - Han-Ching Wang
- Institute of Biotechnology, College of Bioscience and Biotechnology, National Cheng Kung University, Tainan, Taiwan
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Gravina GL, Mancini A, Scarsella L, Colapietro A, Jitariuc A, Vitale F, Marampon F, Ricevuto E, Festuccia C. Dual PI3K/mTOR inhibitor, XL765 (SAR245409), shows superior effects to sole PI3K [XL147 (SAR245408)] or mTOR [rapamycin] inhibition in prostate cancer cell models. Tumour Biol 2015. [PMID: 26219891 DOI: 10.1007/s13277-015-3725-3] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023] Open
Abstract
Deregulation of phosphatidylinositol-3-kinase (PI3K)/protein kinase B (Akt)/mammalian target of rapamycin (mTOR) signaling pathway contributes to prostate cancer development and progression. Here, we compared the in vitro effects of the dual PI3K/mTOR inhibitor (XL765) with those observed with the sole PI3K (XL147) or mTOR (rapamycin) inhibition in 2 non-tumor prostate epithelial cell lines, 8 prostate cancer cell lines, and 11 prostate cancer cell derivatives. We demonstrated that the XL765 treatment showed superior and proliferative effects of XL147 or rapamycin. The XL765 effects were associated to increasing the chromosome region maintenance 1 (CRM1)-mediated nuclear localization of glycogen synthase kinase 3 beta (GSK3β) and Foxo-1a with higher induction of apoptosis when compared to those observed in XL147 and rapamycin treatments. IC50 values were calculated in phosphatase and tensin homologue deleted on chromosome 10 (PTEN)-positive and PTEN-negative cell lines as well as after PTEN transfection or PTEN downmodulation by siRNA strategy revealing that the presence of this protein was associated with reduced sensitivity to PI3K and mTOR inhibitors. The comparison of IC50 values was also calculated for androgen-dependent and -independent cell lines as well as after androgen receptor (AR) transfection or the AR downmodulation by siRNA strategy revealing that androgen independence was associated with enhanced responsiveness. Our results provide a rationale to use the dual PI3K/Akt/mTOR inhibitors in hormone-insensitive prostate cancer models due to the overactivity of PI3K/Akt/mTOR in this disease condition.
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Affiliation(s)
- Giovanni Luca Gravina
- Department of Biotechnological and Applied Clinical Sciences, Laboratory of Radiobiology, University of L'Aquila, L'Aquila, Italy
- Department of Biotechnological and Applied Clinical Sciences, Division of Radiation Oncology, University of L'Aquila, L'Aquila, Italy
| | - Andrea Mancini
- Department of Biotechnological and Applied Clinical Sciences, Laboratory of Radiobiology, University of L'Aquila, L'Aquila, Italy
| | - Luca Scarsella
- Department of Biotechnological and Applied Clinical Sciences, Laboratory of Radiobiology, University of L'Aquila, L'Aquila, Italy
| | - Alessandro Colapietro
- Department of Biotechnological and Applied Clinical Sciences, Laboratory of Radiobiology, University of L'Aquila, L'Aquila, Italy
| | - Ana Jitariuc
- Department of Biotechnological and Applied Clinical Sciences, Laboratory of Radiobiology, University of L'Aquila, L'Aquila, Italy
| | - Flora Vitale
- Department of Biotechnological and Applied Clinical Sciences, Laboratory of Radiobiology, University of L'Aquila, L'Aquila, Italy
| | - Francesco Marampon
- Department of Biotechnological and Applied Clinical Sciences, Laboratory of Radiobiology, University of L'Aquila, L'Aquila, Italy
| | - Enrico Ricevuto
- Department of Biotechnological and Applied Clinical Sciences, Division of Medical Oncology, University of L'Aquila, L'Aquila, Italy
| | - Claudio Festuccia
- Department of Biotechnological and Applied Clinical Sciences, Laboratory of Radiobiology, University of L'Aquila, L'Aquila, Italy.
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Choi J, Jang BN, Park BJ, Joung YK, Han DK. Effect of solvent on drug release and a spray-coated matrix of a sirolimus-eluting stent coated with poly(lactic-co-glycolic acid). Langmuir 2014; 30:10098-10106. [PMID: 25090045 DOI: 10.1021/la500452h] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Sirolimus (SRL) release from the biodegradable poly(l-lactic-co-glycolic acid) (PLGA) matrix was investigated for the application of drug-eluting stents (DES). In particular, this study focused on whether various organic solvents affect the interaction between SRL and PLGA and the formation of microstructures during ultrasonic coating. The SRL-loaded PLGA coated by tetrahydrofuran or acetone showed a significant initial burst, whereas that from acetonitrile was constantly released during a period of 21 days. On the basis of these results, the interactions at the molecular level of SRL with the polymer matrix were estimated according to various organic solvents. Although the topographies of the coated surface were obviously different, the correlation between surface roughness and SRL release was very poor. Irrespective of organic solvents, FT-IR data showed significantly weak SRL-PLGA interactions. From the result of wide-angle X-ray diffraction, it was confirmed that SRL was dispersed in an amorphous state in the polymer matrix after ultrasonic coating. The glass-transition temperature was also influenced by organic solvents, resulting in a plasticizing effect. The particle size of SRL appeared to determine the release profile from the PLGA matrix, which was the combination of diffusion and polymer degradation at an SRL size of more than 800 nm and the Fickian release at that of less than 300 nm. Therefore, organic solvents can lead to a heterogeneous microstructure in the SRL-loaded PLGA matrix, which is at or near the surface, consisting of aggregated drug- and polymer-rich regions. It is expected that the drug release can be controlled by physicochemical properties of organic solvents, and this study can be used effectively for localized drug release in biomedical devices such as drug-eluting stents.
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Affiliation(s)
- Jiyeon Choi
- Center for Biomaterials, Biomedical Research Institute, Korea Institute of Science and Technology , Hwarangno 14-gil 5, Seongbuk-gu, Seoul 136-791, Republic of Korea
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Ghanbarzadeh S, Khorrami A, Mohamed Khosroshahi L, Arami S. Fusogenic pH sensitive liposomal formulation for rapamycin: improvement of antiproliferative effect. Pharm Biol 2014; 52:848-854. [PMID: 24920230 DOI: 10.3109/13880209.2013.871640] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
CONTEXT Liposomes are increasingly employed to deliver chemotherapeutic agents, antisense oligonucleotides, and genes to various therapeutic targets. OBJECTIVE The present investigation evaluates the ability of fusogenic pH-sensitive liposomes of rapamycin in increasing its antiproliferative effect on human breast adenocarcinoma (MCF-7) cell line. MATERIALS AND METHODS Cholesterol (Chol) and dipalmitoylphosphatidylcholine (DPPC) (DPPC:Chol, 7:3) were used to prepare conventional rapamycin liposomes by a modified ethanol injection method. Dioleoylphosphatidylethanolamine (DOPE) was used to produce fusogenic and pH-sensitive properties in liposomes simultaneously (DPPC:Chol:DOPE, 7:3:4.2). The prepared liposomes were characterized by their size, zeta potential, encapsulation efficiency percent (EE%), and chemical stability during 6 months. The antiproliferative effects of both types of rapamycin liposomes (10, 25, and 50 nmol/L) with optimized formulations were assessed on MCF-7 cells, as cancerous cells, and human umbilical vein endothelial cells (HUVEC), as healthy cells, employing the diphenyltetrazolium bromide (MTT) assay for 72 h. RESULTS AND DISCUSSION The particle size, zeta potential, and EE% of the liposomes were 165 ± 12.3 and 178 ± 15.4 nm, -39.6 ± 1.3, and -41.2 ± 2.1 mV as well as 76.9 ± 2.6 and 76.9 ± 2.6% in conventional and fusogenic pH-sensitive liposomes, respectively. Physicochemical stability results indicated that both liposome types were relatively stable at 4 °C than 25 °C. In vitro antiproliferative evaluation showed that fusogenic pH-sensitive liposomes had better antiproliferative effects on MCF-7 cells compared to the conventional liposomes. Conversely, fusogenic pH-sensitive liposomes had less cytotoxicity on HUVEC cell line.
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Affiliation(s)
- Saeed Ghanbarzadeh
- Research Center for Pharmaceutical Nanotechnology, Tabriz University of Medical Sciences , Tabriz , Iran
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Martin-Saavedra FM, Cebrian V, Gomez L, Lopez D, Arruebo M, Wilson CG, Franceschi RT, Voellmy R, Santamaria J, Vilaboa N. Temporal and spatial patterning of transgene expression by near-infrared irradiation. Biomaterials 2014; 35:8134-8143. [PMID: 24957294 DOI: 10.1016/j.biomaterials.2014.06.009] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2014] [Accepted: 06/03/2014] [Indexed: 01/23/2023]
Abstract
We investigated whether near-infrared (NIR) light could be employed for patterning transgene expression in plasmonic cell constructs. Hollow gold nanoparticles with a plasmon surface band absorption peaking at ∼750 nm, a wavelength within the so called "tissue optical window", were used as fillers in fibrin-based hydrogels. These composites, which efficiently transduce NIR photon energy into heat, were loaded with genetically-modified cells that harbor a heat-activated and ligand-dependent gene switch for regulating transgene expression. NIR laser irradiation in the presence of ligand triggered 3-dimensional patterns of transgene expression faithfully matching the illuminated areas of plasmonic cell constructs. This non-invasive technology was proven useful for remotely controlling in vivo the spatiotemporal bioavailability of transgenic vascular endothelial growth factor. The combination of spatial control by means of NIR irradiation along with safe and timed transgene induction presents a high application potential for engineering tissues in regenerative medicine scenarios.
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Affiliation(s)
- Francisco M Martin-Saavedra
- CIBER de Bioingeniería, Biomateriales y Nanomedicina (CIBER-BBN), 28029 Madrid, Spain
- Hospital Universitario La Paz-IdiPAZ, 28046 Madrid, Spain
| | - Virginia Cebrian
- Hospital Universitario La Paz-IdiPAZ, 28046 Madrid, Spain
- CIBER de Bioingeniería, Biomateriales y Nanomedicina (CIBER-BBN), 28029 Madrid, Spain
| | - Leyre Gomez
- Department of Chemical Engineering, Nanoscience Institute of Aragon (INA), University of Zaragoza, 50018 Zaragoza, Spain
| | - Daniel Lopez
- Institute of Polymer Science and Technology (ICTP-CSIC), 28006 Madrid, Spain
| | - Manuel Arruebo
- Department of Chemical Engineering, Nanoscience Institute of Aragon (INA), University of Zaragoza, 50018 Zaragoza, Spain
- CIBER de Bioingeniería, Biomateriales y Nanomedicina (CIBER-BBN), 28029 Madrid, Spain
| | - Christopher G Wilson
- Center for Craniofacial Regeneration and Department of Periodontics and Oral Medicine, University of Michigan School of Dentistry, Ann Arbor, MI 48109, USA
| | - Renny T Franceschi
- Center for Craniofacial Regeneration and Department of Periodontics and Oral Medicine, University of Michigan School of Dentistry, Ann Arbor, MI 48109, USA
| | - Richard Voellmy
- Department of Physiological Sciences, University of Florida, Gainesville, FL 32611, USA
- HSF Pharmaceuticals S.A., 1814 La Tour-de-Peilz, Switzerland
| | - Jesus Santamaria
- Department of Chemical Engineering, Nanoscience Institute of Aragon (INA), University of Zaragoza, 50018 Zaragoza, Spain
- CIBER de Bioingeniería, Biomateriales y Nanomedicina (CIBER-BBN), 28029 Madrid, Spain
| | - Nuria Vilaboa
- Hospital Universitario La Paz-IdiPAZ, 28046 Madrid, Spain
- CIBER de Bioingeniería, Biomateriales y Nanomedicina (CIBER-BBN), 28029 Madrid, Spain
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Cao S, Zhou X, Yang Y, Zhong W, Sun T. Selective substitution of 31/42-OH in rapamycin guided by an in situ IR technique. Molecules 2014; 19:7770-84. [PMID: 24918544 PMCID: PMC6271078 DOI: 10.3390/molecules19067770] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2014] [Revised: 05/26/2014] [Accepted: 05/27/2014] [Indexed: 11/26/2022] Open
Abstract
An in situ IR technique was applied in the selective synthesis of the key intermediate for rapamycin derivatives, which made the reaction endpoint easily defined. This technology solved a bothersome problem in the preparation of rapamycin derivatives, and based on this technique, the 31-OH and 42-OH of rapamycin were chemically modified by a series of quaternary ammonium salts to generate 11 compounds. The solubility of all these compounds was remarkably improved (25,000 times higher than that of rapamycin) and their structures were confirmed by MS, IR, 1D and 2D NMR techniques.
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Affiliation(s)
- Shuang Cao
- Key Laboratory of Structure-Based Drug Design and Discovery, Shenyang Pharmaceutical University, Ministry of Education, Shenyang 110016, China.
| | - Xinbo Zhou
- Laboratory of Computer-Aided Drug Design & Discovery, Beijing Institute of Pharmacology and Toxicology, Beijing 100850, China.
| | - Yuanshuai Yang
- Key Laboratory of Structure-Based Drug Design and Discovery, Shenyang Pharmaceutical University, Ministry of Education, Shenyang 110016, China.
| | - Wu Zhong
- Laboratory of Computer-Aided Drug Design & Discovery, Beijing Institute of Pharmacology and Toxicology, Beijing 100850, China.
| | - Tiemin Sun
- Key Laboratory of Structure-Based Drug Design and Discovery, Shenyang Pharmaceutical University, Ministry of Education, Shenyang 110016, China.
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Mano N. [Fundamental knowledge and master of mass spectrometry: important reminder and pitfall in quantitative analysis]. Rinsho Byori 2014; 62:269-275. [PMID: 24800504] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Recently, mass spectrometry has become frequently applied in various areas of research because of the easy handling of instruments. However, its use without an adequate understanding of the characteristics of mass spectrometry and/or with an unreliable analytical method often lead to the misinterpretation of data. Sample pretreatments such as deproteinization, liquid-liquid extraction, and solid-phase extraction are very important to improve detection sensitivity. In addition, during the electrospray ionization process, the components of droplets affect the ionization efficiency of analytes, and, therefore, the elimination of unwanted materials is essential for the development of a reliable analytical method. We experienced marked deviations in measurement values for the sirolimus blood concentration in the same sample. Post-column infusion experiments were very useful for identifying ionization suppression factors in analytical samples, and mass spectrometric analysis was effective for their identification. In consequence, lysophosphatidylcholines suppressed the ionization of sirolimus and an internal standard, ascomycin, and we removed them from analytical samples using a HybridSPE-pretreatment cartridge, which is a solid-phase extraction cartridge for capturing phospholipids from biological samples. The incorporation of this step into the sample pretreatment procedure led to the development of a reliable analytical method for the quantitative determination of sirolimus in human blood using liquid chromatography/electrospray ionization tandem mass spectrometry. In clinical practice, rapid and reliable analytical methods are required for the improvement of medical services, and, therefore, users of mass spectrometers should understand their characteristics.
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Li W, Li Q, Jiao Y, Qin L, Ali R, Zhou J, Ferruzzi J, Kim RW, Geirsson A, Dietz HC, Offermanns S, Humphrey JD, Tellides G. Tgfbr2 disruption in postnatal smooth muscle impairs aortic wall homeostasis. J Clin Invest 2014; 124:755-67. [PMID: 24401272 DOI: 10.1172/jci69942] [Citation(s) in RCA: 206] [Impact Index Per Article: 20.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2013] [Accepted: 10/31/2013] [Indexed: 12/13/2022] Open
Abstract
TGF-β is essential for vascular development; however, excess TGF-β signaling promotes thoracic aortic aneurysm and dissection in multiple disorders, including Marfan syndrome. Since the pathology of TGF-β overactivity manifests primarily within the arterial media, it is widely assumed that suppression of TGF-β signaling in vascular smooth muscle cells will ameliorate aortic disease. We tested this hypothesis by conditional inactivation of Tgfbr2, which encodes the TGF-β type II receptor, in smooth muscle cells of postweanling mice. Surprisingly, the thoracic aorta rapidly thickened, dilated, and dissected in these animals. Tgfbr2 disruption predictably decreased canonical Smad signaling, but unexpectedly increased MAPK signaling. Type II receptor-independent effects of TGF-β and pathological responses by nonrecombined smooth muscle cells were excluded by serologic neutralization. Aortic disease was caused by a perturbed contractile apparatus in medial cells and growth factor production by adventitial cells, both of which resulted in maladaptive paracrine interactions between the vessel wall compartments. Treatment with rapamycin restored a quiescent smooth muscle phenotype and prevented dissection. Tgfbr2 disruption in smooth muscle cells also accelerated aneurysm growth in a murine model of Marfan syndrome. Our data indicate that basal TGF-β signaling in smooth muscle promotes postnatal aortic wall homeostasis and impedes disease progression.
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Wang Y, Zhang W, Zhang J, Sun W, Zhang R, Gu H. Fabrication of a novel polymer-free nanostructured drug-eluting coating for cardiovascular stents. ACS Appl Mater Interfaces 2013; 5:10337-45. [PMID: 24066711 DOI: 10.1021/am403365j] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
Angioplasty with stents is the most important method for the treatment of coronary artery disease (CAD). However, the drug-eluting stents (DES) that are widely used have the increased risks of inflammatory reactions and late stent thrombosis (LST) because of the persistence of the polymer coatings. To improve the biosafety, a novel polymer-free-composite drug-eluting coating composed of magnetic mesoporous silica nanoparticles (MMSNs) and carbon nanotubes (CNTs) was constructed using the electrophoretic deposition (EPD) method in this study. A crack-free two-layered coating with impressive network nanotopologies was successfully obtained by regulating the composition and structures. This nanostructured coating exhibits excellent mechanical flexibility and blood compatibility in vitro, and the drug-loading and release performance is satisfactory as well. The in vivo study shows that this composite coating has the obvious advantage of rapid endothelialization because of its unique 3D nanostructured topology in comparison with the commercial polymer-coated DES. This study aims to provide new ideas and reliable data to design novel functional coatings that could accelerate the re-endothelialization process and avoid inflammatory reactions, thus improving the in vivo biosafety of DES.
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Affiliation(s)
- Yao Wang
- Nano Biomedical Research center, School of Biomedical Engineering and Med-X Research Institute, Shanghai Jiao Tong University , Shanghai 200030, China
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Chang AJ, Sohn R, Lu ZH, Arbeit JM, Lapi SE. Detection of rapalog-mediated therapeutic response in renal cancer xenografts using ⁶⁴Cu-bevacizumab immunoPET. PLoS One 2013; 8:e58949. [PMID: 23516584 PMCID: PMC3597567 DOI: 10.1371/journal.pone.0058949] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2012] [Accepted: 02/11/2013] [Indexed: 11/19/2022] Open
Abstract
The importance of neovascularization for primary and metastatic tumor growth fostered numerous clinical trials of angiogenesis inhibitors either alone or in combination with conventional antineoplastic therapies. One challenge with the use of molecularly targeted agents has been the disconnection between size reduction and tumor biologic behavior, either when the drug is efficacious or when tumor resistance emerges. Here, we report the synthesis and characterization of (64)Cu-NOTA-bevacizumab as a PET imaging agent for imaging intratumoral VEGF content in vivo. (64)Cu-NOTA-bevacizumab avidly accumulated in 786-O renal carcinoma xenografts with lower levels in host organs. RAD001 (everolimus) markedly attenuated (64)Cu-NOTA-bevacizumab accumulation within 786-O renal carcinoma xenografts. Tumor tissue and cellular molecular analysis validated PET imaging, demonstrating decreases in total and secreted VEGF content and VEGFR2 activation. Notably, (64)Cu-NOTA-bevacizumab PET imaging was concordant with the growth arrest of RAD001 tumors. These data suggest that immunoPET targeting of angiogenic factors such as VEGF could be a new class of surrogate markers complementing the RECIST criteria in patients receiving molecularly targeted therapies.
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MESH Headings
- Animals
- Antibodies, Monoclonal, Humanized/chemistry
- Antibodies, Monoclonal, Humanized/metabolism
- Antibodies, Monoclonal, Humanized/pharmacokinetics
- Bevacizumab
- Cell Line, Tumor
- Cell Transformation, Neoplastic
- Copper Radioisotopes
- Everolimus
- Heterocyclic Compounds/chemistry
- Heterocyclic Compounds, 1-Ring
- Humans
- Immunoconjugates
- Kidney Neoplasms/blood supply
- Kidney Neoplasms/diagnostic imaging
- Kidney Neoplasms/pathology
- Kidney Neoplasms/therapy
- Mice
- Neovascularization, Pathologic
- Phosphorylation/drug effects
- Positron-Emission Tomography
- Sirolimus/analogs & derivatives
- Sirolimus/chemistry
- Sirolimus/pharmacology
- Treatment Outcome
- Vascular Endothelial Growth Factor A/metabolism
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Affiliation(s)
- Albert J. Chang
- Department of Radiation Oncology, Washington University, St. Louis, Missouri, United States of America
- Department of Radiology, Washington University, St. Louis, Missouri, United States of America
| | - Rebecca Sohn
- Urology Division, Department of Surgery, Washington University, St. Louis, Missouri, United States of America
| | - Zhi Hong Lu
- Urology Division, Department of Surgery, Washington University, St. Louis, Missouri, United States of America
| | - Jeffrey M. Arbeit
- Urology Division, Department of Surgery, Washington University, St. Louis, Missouri, United States of America
- Siteman Cancer Center, St. Louis, Missouri, United States of America
- * E-mail: (SEL); (JMA)
| | - Suzanne E. Lapi
- Department of Radiology, Washington University, St. Louis, Missouri, United States of America
- Siteman Cancer Center, St. Louis, Missouri, United States of America
- * E-mail: (SEL); (JMA)
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Qiu H, Hu XY, Luo T, Xu B, Xie J, Hu X, Mu CW, Wu C, Tang Y, Ran YM, Xu XL, Chu Y, Gao RL. Short-term safety and effects of a novel fully bioabsorable poly-L-lactic acid sirolimus-eluting stents in porcine coronary arteries. Chin Med J (Engl) 2013; 126:1183-1185. [PMID: 23506602] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/01/2023] Open
Affiliation(s)
- Hong Qiu
- Department of Cardiology, Cardiovascular Institute and Fu Wai Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing 100037, China
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Abstract
Metallic drug eluting stents (DES) are usually prepared by coating with a drug-polymer matrix as a rate controlling diffusion barrier. However, coating materials may display numerous problems, thus carrier-free DES are desired, yet releasing drug over long period of time. For this, we are reporting a novel temperature induced (TI) crystallization process for coating rapamycin on stents. Rapamycin crystals with a defined morphology and target drug load were applied from supersaturated solution. This method enables fabrication of controllable and homogeneous crystalline coatings on stent scaffolds and allowing the drug to release for several weeks.
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Affiliation(s)
- Yair Levy
- School of Pharmacy, Faculty of Medicine, The Hebrew University of Jerusalem, Israel, 91120
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