1
|
Kang J, Mun D, Chun Y, Park D, Kim H, Yun N, Joung B. Engineered small extracellular vesicle-mediated NOX4 siRNA delivery for targeted therapy of cardiac hypertrophy. J Extracell Vesicles 2023; 12:e12371. [PMID: 37795828 PMCID: PMC10552075 DOI: 10.1002/jev2.12371] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2023] [Revised: 09/18/2023] [Accepted: 09/27/2023] [Indexed: 10/06/2023] Open
Abstract
Small-interfering RNA (siRNA) therapy is considered a powerful therapeutic strategy for treating cardiac hypertrophy, an important risk factor for subsequent cardiac morbidity and mortality. However, the lack of safe and efficient in vivo delivery of siRNAs is a major challenge for broadening its clinical applications. Small extracellular vesicles (sEVs) are a promising delivery system for siRNAs but have limited cell/tissue-specific targeting ability. In this study, a new generation of heart-targeting sEVs (CEVs) has been developed by conjugating cardiac-targeting peptide (CTP) to human peripheral blood-derived sEVs (PB-EVs), using a simple, rapid and scalable method based on bio-orthogonal copper-free click chemistry. The experimental results show that CEVs have typical sEVs properties and excellent heart-targeting ability. Furthermore, to treat cardiac hypertrophy, CEVs are loaded with NADPH Oxidase 4 (NOX4) siRNA (siNOX4). Consequently, CEVs@siNOX4 treatment enhances the in vitro anti-hypertrophic effects by CEVs with siRNA protection and heart-targeting ability. In addition, the intravenous injection of CEVs@siNOX4 into angiotensin II (Ang II)-treated mice significantly improves cardiac function and reduces fibrosis and cardiomyocyte cross-sectional area, with limited side effects. In conclusion, the utilization of CEVs represents an efficient strategy for heart-targeted delivery of therapeutic siRNAs and holds great promise for the treatment of cardiac hypertrophy.
Collapse
Affiliation(s)
- Ji‐Young Kang
- Division of Cardiology, Department of Internal MedicineYonsei University College of MedicineSeodaemun‐guSeoulRepublic of Korea
| | - Dasom Mun
- Division of Cardiology, Department of Internal MedicineYonsei University College of MedicineSeodaemun‐guSeoulRepublic of Korea
| | - Yumin Chun
- Division of Cardiology, Department of Internal MedicineYonsei University College of MedicineSeodaemun‐guSeoulRepublic of Korea
| | - Da‐Seul Park
- Division of Cardiology, Department of Internal MedicineYonsei University College of MedicineSeodaemun‐guSeoulRepublic of Korea
| | - Hyoeun Kim
- Department of Biochemistry and Molecular BiologyYonsei University College of MedicineSeodaemun‐guSeoulRepublic of Korea
| | - Nuri Yun
- GNTPharma Science and Technology Center for Health, Giheung‐guYongin‐siIncheonRepublic of Korea
| | - Boyoung Joung
- Division of Cardiology, Department of Internal MedicineYonsei University College of MedicineSeodaemun‐guSeoulRepublic of Korea
- Graduate School of Medical Science, Brain Korea 21 ProjectYonsei University College of MedicineSeodaemun‐guSeoulRepublic of Korea
| |
Collapse
|
2
|
Tessier N, Moawad F, Amri N, Brambilla D, Martel C. Focus on the Lymphatic Route to Optimize Drug Delivery in Cardiovascular Medicine. Pharmaceutics 2021; 13:1200. [PMID: 34452161 PMCID: PMC8398144 DOI: 10.3390/pharmaceutics13081200] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2021] [Revised: 07/27/2021] [Accepted: 07/29/2021] [Indexed: 11/26/2022] Open
Abstract
While oral agents have been the gold standard for cardiovascular disease therapy, the new generation of treatments is switching to other administration options that offer reduced dosing frequency and more efficacy. The lymphatic network is a unidirectional and low-pressure vascular system that is responsible for the absorption of interstitial fluids, molecules, and cells from the peripheral tissue, including the skin and the intestines. Targeting the lymphatic route for drug delivery employing traditional or new technologies and drug formulations is exponentially gaining attention in the quest to avoid the hepatic first-pass effect. The present review will give an overview of the current knowledge on the involvement of the lymphatic vessels in drug delivery in the context of cardiovascular disease.
Collapse
Affiliation(s)
- Nolwenn Tessier
- Department of Medicine, Faculty of Medicine, Université de Montréal, Montreal, QC H3T 1J4, Canada; (N.T.); (N.A.)
- Montreal Heart Institute Research Center, Montreal, QC H1T 1C8, Canada
| | - Fatma Moawad
- Faculty of Pharmacy, Université de Montréal, Montreal, QC H3T 1J4, Canada;
- Department of Pharmaceutics, Faculty of Pharmacy, Beni-Suef University, Beni-Suef 62511, Egypt
| | - Nada Amri
- Department of Medicine, Faculty of Medicine, Université de Montréal, Montreal, QC H3T 1J4, Canada; (N.T.); (N.A.)
- Montreal Heart Institute Research Center, Montreal, QC H1T 1C8, Canada
| | - Davide Brambilla
- Faculty of Pharmacy, Université de Montréal, Montreal, QC H3T 1J4, Canada;
| | - Catherine Martel
- Department of Medicine, Faculty of Medicine, Université de Montréal, Montreal, QC H3T 1J4, Canada; (N.T.); (N.A.)
- Montreal Heart Institute Research Center, Montreal, QC H1T 1C8, Canada
| |
Collapse
|
3
|
Photosensitive nanocarriers for specific delivery of cargo into cells. Sci Rep 2020; 10:2110. [PMID: 32034197 PMCID: PMC7005817 DOI: 10.1038/s41598-020-58865-z] [Citation(s) in RCA: 28] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2019] [Accepted: 01/19/2020] [Indexed: 12/11/2022] Open
Abstract
Nanoencapsulation is a rapidly expanding technology to enclose cargo into inert material at the nanoscale size, which protects cargo from degradation, improves bioavailability and allows for controlled release. Encapsulation of drugs into functional nanocarriers enhances their specificity, targeting ability, efficiency, and effectiveness. Functionality may come from cell targeting biomolecules that direct nanocarriers to a specific cell or tissue. Delivery is usually mediated by diffusion and erosion mechanisms, but in some cases, this is not sufficient to reach the expected therapeutic effects. This work reports on the development of a new photoresponsive polymeric nanocarrier (PNc)-based nanobioconjugate (NBc) for specific photo-delivery of cargo into target cells. We readily synthesized the PNcs by modification of chitosan with ultraviolet (UV)-photosensitive azobenzene molecules, with Nile red and dofetilide as cargo models to prove the encapsulation/release concept. The PNcs were further functionalized with the cardiac targeting transmembrane peptide and efficiently internalized into cardiomyocytes, as a cell line model. Intracellular cargo-release was dramatically accelerated upon a very short UV-light irradiation time. Delivering cargo in a time-space controlled fashion by means of NBcs is a promising strategy to increase the intracellular cargo concentration, to decrease dose and cargo side effects, thereby improving the effectiveness of a therapeutic regime.
Collapse
|
4
|
Optimized Photodynamic Therapy with Multifunctional Cobalt Magnetic Nanoparticles. NANOMATERIALS 2017; 7:nano7060144. [PMID: 28604596 PMCID: PMC5485791 DOI: 10.3390/nano7060144] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/02/2017] [Revised: 05/24/2017] [Accepted: 06/07/2017] [Indexed: 11/21/2022]
Abstract
Photodynamic therapy (PDT) has been adopted as a minimally invasive approach for the localized treatment of superficial tumors, representing an improvement in the care of cancer patients. To improve the efficacy of PDT, it is important to first select an optimized nanocarrier and determine the influence of light parameters on the photosensitizing agent. In particular, much more knowledge concerning the importance of fluence and exposure time is required to gain a better understanding of the photodynamic efficacy. In the present study, we synthesized novel folic acid-(FA) and hematoporphyrin (HP)-conjugated multifunctional magnetic nanoparticles (CoFe2O4-HPs-FAs), which were characterized as effective anticancer reagents for PDT, and evaluated the influence of incubation time and light exposure time on the photodynamic anticancer activities of CoFe2O4-HPs-FAs in prostate cancer cells (PC-3 cells). The results indicated that the same fluence at different exposure times resulted in changes in the anticancer activities on PC-3 cells as well as in reactive oxygen species formation. In addition, an increase of the fluence showed an improvement for cell photo-inactivation. Therefore, we have established optimized conditions for new multifunctional magnetic nanoparticles with direct application for improving PDT for cancer patients.
Collapse
|
5
|
Karathanos TV, Boyle PM, Trayanova NA. Light-based Approaches to Cardiac Arrhythmia Research: From Basic Science to Translational Applications. CLINICAL MEDICINE INSIGHTS-CARDIOLOGY 2016; 10:47-60. [PMID: 27840581 PMCID: PMC5094582 DOI: 10.4137/cmc.s39711] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/07/2016] [Revised: 09/27/2016] [Accepted: 10/09/2016] [Indexed: 02/06/2023]
Abstract
Light has long been used to image the heart, but now it can be used to modulate its electrophysiological function. Imaging modalities and techniques have long constituted an indispensable part of arrhythmia research and treatment. Recently, advances in the fields of optogenetics and photodynamic therapy have provided scientists with more effective approaches for probing, studying and potentially devising new treatments for cardiac arrhythmias. This article is a review of research toward the application of these techniques. It contains (a) an overview of advancements in technology and research that have contributed to light-based cardiac applications and (b) a summary of current and potential future applications of light-based control of cardiac cells, including modulation of heart rhythm, manipulation of cardiac action potential morphology, quantitative analysis of arrhythmias, defibrillation and cardiac ablation.
Collapse
Affiliation(s)
- Thomas V. Karathanos
- Department of Biomedical Engineering, Johns Hopkins University, Baltimore, MD, USA
- Institute for Computational Medicine, Johns Hopkins University, Baltimore, MD, USA
| | - Patrick M. Boyle
- Department of Biomedical Engineering, Johns Hopkins University, Baltimore, MD, USA
- Institute for Computational Medicine, Johns Hopkins University, Baltimore, MD, USA
| | - Natalia A. Trayanova
- Department of Biomedical Engineering, Johns Hopkins University, Baltimore, MD, USA
- Institute for Computational Medicine, Johns Hopkins University, Baltimore, MD, USA
- Department of Medicine, Johns Hopkins University, Baltimore, MD, USA
| |
Collapse
|
6
|
Avula UMR, Yoon HK, Lee CH, Kaur K, Ramirez RJ, Takemoto Y, Ennis SR, Morady F, Herron T, Berenfeld O, Kopelman R, Kalifa J. Cell-selective arrhythmia ablation for photomodulation of heart rhythm. Sci Transl Med 2016; 7:311ra172. [PMID: 26511509 DOI: 10.1126/scitranslmed.aab3665] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
Abstract
Heart disease, a leading cause of death in the developed world, is overwhelmingly correlated with arrhythmias, where heart muscle cells, myocytes, beat abnormally. Cardiac arrhythmias are usually managed by electric shock intervention, antiarrhythmic drugs, surgery, and/or catheter ablation. Despite recent improvements in techniques, ablation procedures are still limited by the risk of complications from unwanted cellular damage, caused by the nonspecific delivery of ablative energy to all heart cell types. We describe an engineered nanoparticle containing a cardiac-targeting peptide (CTP) and a photosensitizer, chlorin e6 (Ce6), for specific delivery to myocytes. Specificity was confirmed in vitro using adult rat heart cell and human stem cell-derived cardiomyocyte and fibroblast cocultures. In vivo, the CTP-Ce6 nanoparticles were injected intravenously into rats and, upon laser illumination of the heart, induced localized, myocyte-specific ablation with 85% efficiency, restoring sinus rhythm without collateral damage to other cell types in the heart, such as fibroblasts. In both sheep and rat hearts ex vivo, upon perfusion of CTP-Ce6 particles, laser illumination led to the formation of a complete electrical block at the ablated region and restored the physiological rhythm of the heart. This nano-based, cell-targeted approach could improve ablative technologies for patients with arrhythmias by reducing currently encountered complications.
Collapse
Affiliation(s)
- Uma Mahesh R Avula
- Division of Cardiovascular Medicine, Department of Internal Medicine, Center for Arrhythmia Research, University of Michigan, Ann Arbor, MI 48109, USA
| | - Hyung Ki Yoon
- Department of Chemistry, University of Michigan, Ann Arbor, MI 48109, USA
| | - Chang H Lee
- Department of Chemistry, University of Michigan, Ann Arbor, MI 48109, USA
| | - Kuljeet Kaur
- Division of Cardiovascular Medicine, Department of Internal Medicine, Center for Arrhythmia Research, University of Michigan, Ann Arbor, MI 48109, USA
| | - Rafael J Ramirez
- Division of Cardiovascular Medicine, Department of Internal Medicine, Center for Arrhythmia Research, University of Michigan, Ann Arbor, MI 48109, USA
| | - Yoshio Takemoto
- Division of Cardiovascular Medicine, Department of Internal Medicine, Center for Arrhythmia Research, University of Michigan, Ann Arbor, MI 48109, USA
| | - Steven R Ennis
- Division of Cardiovascular Medicine, Department of Internal Medicine, Center for Arrhythmia Research, University of Michigan, Ann Arbor, MI 48109, USA
| | - Fred Morady
- Division of Cardiovascular Medicine, Department of Internal Medicine, Center for Arrhythmia Research, University of Michigan, Ann Arbor, MI 48109, USA
| | - Todd Herron
- Division of Cardiovascular Medicine, Department of Internal Medicine, Center for Arrhythmia Research, University of Michigan, Ann Arbor, MI 48109, USA
| | - Omer Berenfeld
- Division of Cardiovascular Medicine, Department of Internal Medicine, Center for Arrhythmia Research, University of Michigan, Ann Arbor, MI 48109, USA
| | - Raoul Kopelman
- Department of Chemistry, University of Michigan, Ann Arbor, MI 48109, USA.
| | - Jérôme Kalifa
- Division of Cardiovascular Medicine, Department of Internal Medicine, Center for Arrhythmia Research, University of Michigan, Ann Arbor, MI 48109, USA.
| |
Collapse
|
7
|
Maher KO, Chang AC, Shin A, Hunt J, Wong HR. Innovation in Pediatric Cardiac Intensive Care: An Exponential Convergence Toward Transformation of Care. World J Pediatr Congenit Heart Surg 2016; 6:588-96. [PMID: 26467873 DOI: 10.1177/2150135115606087] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
The word innovation is derived from the Latin noun innovatus, meaning renewal or change. Although companies such as Google and Apple are nearly synonymous with innovation, virtually all sectors in our current lives are imbued with yearn for innovation. This has led to organizational focus on innovative strategies as well as recruitment of chief innovation officers and teams in a myriad of organizations. At times, however, the word innovation seems like an overused cliché, as there are now more than 5,000 books in print with the word "innovation" in the title. More recently, innovation has garnered significant attention in health care. The future of health care is expected to innovate on a large scale in order to deliver sustained value for an overall transformative care. To date, there are no published reports on the state of the art in innovation in pediatric health care and in particular, pediatric cardiac intensive care. This report will address the issue of innovation in pediatric medicine with relevance to cardiac intensive care and delineate possible future directions and strategies in pediatric cardiac intensive care.
Collapse
Affiliation(s)
- Kevin O Maher
- Children's Hospital of Atlanta, Cardiac Intensive Care Unit, Sibley Heart Center Department of Pediatrics, Emory University School of Medicine, Atlanta, Georgia, USA
| | - Anthony C Chang
- Sharon Disney Lund Medical Intelligence and Innovation Institute (MI3), Children's Hospital of Orange County, Orange, CA, USA Honors Cooperative Program in Biomedical Informatics and Artificial Intelligence, Stanford School of Medicine, Stanford, CA, USA
| | - Andrew Shin
- Cardiac Intensive Care Unit, Lucille Packard Children's Hospital, Palo Alto, CA, USA Department of Pediatrics, Stanford University School of Medicine, Stanford, CA, USA
| | - Juliette Hunt
- Cardiac Intensive Care Unit, Children's Hospital of Orange County, Orange, CA, USA Department of Pediatrics, University of California at Irvine School of Medicine, Irvine, CA, USA
| | - Hector R Wong
- Pediatric Intensive Care Unit, Cincinnati Children's Hospital, Cincinnati, OH, USA Department of Pediatrics, University of Cincinnati, Cincinnati, OH, USA
| |
Collapse
|
8
|
Jo J, Lee CH, Kopelman R, Wang X. Lifetime-resolved Photoacoustic (LPA) Spectroscopy for monitoring Oxygen change and Photodynamic Therapy (PDT). PROCEEDINGS OF SPIE--THE INTERNATIONAL SOCIETY FOR OPTICAL ENGINEERING 2016; 9708. [PMID: 28529402 DOI: 10.1117/12.2213083] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
The Methylene Blue loaded Polyacrylamide Nanoparticles (MB-PAA NPs) are used for oxygen sensing and Photodynamic therapy (PDT), a promising therapeutic modality employed for various tumors, with distinct advantages of delivery of biomedical agents and protection from other bio-molecules overcoming inherent limitations of molecular dyes. Lifetime-resolved photoacoustic spectroscopy using quenched-phosphorescence method is applied with MB-PAA NPs so as to sense oxygen, while the same light source is used for PDT. The dye is excited by absorbing 650 nm wavelength light from a pump laser to reach triplet state. The probe laser at 810 nm wavelength is used to excite the first triplet state at certain delayed time to measure the dye lifetime which indicates oxygen concentration. The 9L cells (106 cells/ml) incubated with MB-PAA NP solution are used for monitoring oxygen level change during PDT in situ test. The oxygen level and PDT efficacy are confirmed with a commercial oximeter, and fluorescence microscope imaging and flow cytometry results. This technique with the MB-PAA NPs allowed us to demonstrate a potential non-invasive theragnostic operation, by monitoring oxygen depletion during PDT in situ, without the addition of secondary probes. Here, we demonstrate this theragnostic operation, in vitro, performing PDT while monitoring oxygen depletion. We also show the correlation between O2 depletion and cell death.
Collapse
Affiliation(s)
- Janggun Jo
- Department of Radiology, University of Michigan Medical School, Ann Arbor, Michigan 48109
| | - Chang Heon Lee
- Department of Radiology, University of Michigan Medical School, Ann Arbor, Michigan 48109
| | - Raoul Kopelman
- Department of Chemistry, University of Michigan, Ann Arbor, Michigan 48109
| | - Xueding Wang
- Department of Radiology, University of Michigan Medical School, Ann Arbor, Michigan 48109
| |
Collapse
|
9
|
Abstract
Cell penetrating peptides (CPP), also known as protein transduction domains (PTD), are small peptides able to carry peptides, proteins, nucleic acid, and nanoparticles, including viral particles, across the cellular membranes into cells, resulting in internalization of the intact cargo. In general, CPPs can be broadly classified into tissue-specific and non-tissue specific peptides, with the latter further sub-divided into three types: (1) cationic peptides of 6-12 amino acids in length comprised predominantly of arginine, lysine and/or ornithine residues; (2) hydrophobic peptides such as leader sequences of secreted growth factors or cytokines; and (3) amphipathic peptides obtained by linking hydrophobic peptides to nuclear localizing signals. Tissue-specific peptides are usually identified by screening of large peptide phage display libraries. These transduction peptides have the potential for a myriad of diagnostic as well as therapeutic applications, ranging from delivery of fluorescent or radioactive compounds for imaging, to delivery of peptides and proteins of therapeutic potential, and improving uptake of DNA, RNA, siRNA and even viral particles. Here we review the potential applications as well as hurdles to the tremendous potential of these CPPs, in particular the cell-type specific peptides.
Collapse
|
10
|
Wang J, Yang YM, Zhu J. Mechanisms of new-onset atrial fibrillation complicating acute coronary syndrome. Herz 2014; 40 Suppl 1:18-26. [PMID: 25352243 DOI: 10.1007/s00059-014-4149-3] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2013] [Revised: 08/01/2014] [Accepted: 08/16/2014] [Indexed: 11/24/2022]
Abstract
Atrial fibrillation (AF) is one of the most common arrhythmia complications of acute coronary syndrome (ACS). The incidence of new-onset AF is 2.3-37 %, and it is an important predictor of a patient's morbidity, mortality, and prolonged hospitalization. Various risk factors for the development of new-onset AF after ACS have been identified, including: old age, higher Killip class, relevant history (e.g., hypertension), and enlarged left atrium. Insights into the pathophysiological mechanisms of new-onset AF have been provided by both experimental and clinical investigations and show that new-onset AF is multifactorial, involving atrial ischemia and atrial stretch, inflammation, autonomic nervous system activity, and hormone activation. An understanding of the mechanisms underlying new-onset AF complicating ACS can provide new insight of therapeutic importance.
Collapse
Affiliation(s)
- J Wang
- Emergency and Intensive Care Center, State Key Laboratory of Cardiovascular Disease, Fuwai Hospital, National Center for Cardiovascular Disease, Chinese Academy of Medical Science and Peking Union Medical College, Beijing, China
| | | | | |
Collapse
|
11
|
Yoon HK, Lou X, Chen YC, Koo Lee YE, Yoon E, Kopelman R. Nano-photosensitizers Engineered to Generate a Tunable Mix of Reactive Oxygen Species, for Optimizing Photodynamic Therapy, Using a Microfluidic Device. CHEMISTRY OF MATERIALS : A PUBLICATION OF THE AMERICAN CHEMICAL SOCIETY 2014; 26:1592-1600. [PMID: 24701030 PMCID: PMC3970790 DOI: 10.1021/cm403505s] [Citation(s) in RCA: 52] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/16/2023]
Abstract
This work is aimed at engineering photosensitizer embedded nanoparticles (NPs) that produce optimal amount of reactive oxygen species (ROS) for photodynamic therapy (PDT). A revised synthetic approach, coupled with improved analytical tools, resulted in more efficient PDT. Specifically, methylene blue (MB) conjugated polyacrylamide nanoparticles (PAA NPs), with a polyethylene glycol dimethacrylate (PEGDMA, Mn 550) cross-linker, were synthesized so as to improve the efficacy of cancer PDT. The long cross-linker chain, PEGDMA, increases the distance between the conjugated MB molecules so as to avoid self-quenching of the excited states or species, and also enhances the oxygen permeability of the NP matrix, when compared to the previously used shorter cross-linker. The overall ROS production from the MB-PEGDMA PAA NPs was evaluated using the traditional way of monitoring the oxidation rate kinetics of anthracence-9,10-dipropionic acid (ADPA). We also applied singlet oxygen sensor green (SOSG) so as to selectively derive the singlet oxygen (1O2) production rate. This analysis enabled us to investigate the ROS composition mix based on varied MB loading. To effectively obtain the correlation between the ROS productivity and the cell killing efficacy, a microfluidic chip device was employed to provide homogeneous light illumination from an LED for rapid PDT efficacy tests, enabling simultaneous multiple measurements while using only small amounts of NPs sample. This provided multiplexed, comprehensive PDT efficacy assays, leading to the determination of a near optimal loading of MB in a PAA matrix for high PDT efficacy by measuring the light-dose-dependent cell killing effects of the various MB-PEGDMA PAA NPs using C6 glioma cancer cells.
Collapse
Affiliation(s)
- Hyung Ki Yoon
- Department of Chemistry, University of Michigan, Ann Arbor, MI 48109, United States
| | - Xia Lou
- Department of Electrical Engineering and Computer Science, University of Michigan, Ann Arbor, MI 48109, United States
| | - Yu-Chih Chen
- Department of Electrical Engineering and Computer Science, University of Michigan, Ann Arbor, MI 48109, United States
| | - Yong-Eun Koo Lee
- Department of Chemistry, University of Michigan, Ann Arbor, MI 48109, United States
| | - Euisik Yoon
- Department of Electrical Engineering and Computer Science, University of Michigan, Ann Arbor, MI 48109, United States
| | - Raoul Kopelman
- Department of Chemistry, University of Michigan, Ann Arbor, MI 48109, United States
| |
Collapse
|
12
|
Yoon HK, Ray A, Lee YEK, Kim G, Wang X, Kopelman R. Polymer-Protein Hydrogel Nanomatrix for Stabilization of Indocyanine Green towards Targeted Fluorescence and Photoacoustic Bio-imaging. J Mater Chem B 2013; 1:10.1039/C3TB21060J. [PMID: 24224083 PMCID: PMC3820374 DOI: 10.1039/c3tb21060j] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Indocyanine green (ICG) is an optical contrast agent commonly used for a variety of imaging applications. However, certain limitations of the free dye molecule, concerning its low stability, uncontrolled aggregation and lack of targeting ability, have limited its use. Presented here is a method of embedding ICG in a novel polymer/protein hybrid nanocarrier so as to overcome the above inherent drawbacks of the free molecule. The hybrid nanocarrier consists of a non-toxic and biocompatible polyacrylamide nanoparticle (PAA NP) matrix that incorporates human serum albumin (HSA). This nanocarrier was synthesized through pre-conjugation with HSA and amine functionalized monomer, followed by polymerization using biodegradable cross-linkers, in a water-in-oil emulsion. The ICG dye is loaded into the HSA conjugated PAA nanoparticles (HSA-PAA NPs) through post-loading. Compared to the PAA polymer matrix, the presence of hydrophobic pockets in the HSA-PAA NPs further increases the chemical and physical stability of ICG. This is manifested by lowering the chemical degradation rates under physiological conditions, as well as by improving the thermal- and photo-stability of the dye. A targeting moiety, F3-Cys peptide, was attached to the surface of the NPs, for selective delivery to specific cancer cell lines. The suitability of these NPs for optical imaging applications was demonstrated by performing fluorescence imaging on a rat gliosarcoma cell line (9L). We also present the photoacoustic response of the HSA-PAA NPs, used as imaging contrast agents, in the spectral window of 700 nm to 800 nm.
Collapse
Affiliation(s)
- Hyung Ki Yoon
- Department of Chemistry, University of Michigan, 4744 Chemistry, 930 N. University Avenue, Ann Arbor, MI, USA. Fax: 01 734 936 2778; Tel: 01 734 764 7541
| | - Aniruddha Ray
- Department of Chemistry, University of Michigan, 4744 Chemistry, 930 N. University Avenue, Ann Arbor, MI, USA. Fax: 01 734 936 2778; Tel: 01 734 764 7541
| | - Yong-Eun Koo Lee
- Department of Chemistry, University of Michigan, 4744 Chemistry, 930 N. University Avenue, Ann Arbor, MI, USA. Fax: 01 734 936 2778; Tel: 01 734 764 7541
| | - Gwangseong Kim
- Department of Chemistry, University of Michigan, 4744 Chemistry, 930 N. University Avenue, Ann Arbor, MI, USA. Fax: 01 734 936 2778; Tel: 01 734 764 7541
| | - Xueding Wang
- Department of Radiology, University of Michigan, 3226B Medical Science Building I, 1150 West Medical Center Drive, Ann Arbor, MI, USA. Fax: 01 734 764 8541; Tel: 01 734 647 2728
| | - Raoul Kopelman
- Department of Chemistry, University of Michigan, 4744 Chemistry, 930 N. University Avenue, Ann Arbor, MI, USA. Fax: 01 734 936 2778; Tel: 01 734 764 7541
| |
Collapse
|
13
|
Yamada KA, Smith TW. Photodynamic therapy: shining new light on limiting the collateral damage of ablation? Heart Rhythm 2012; 9:1510-1. [PMID: 22642984 DOI: 10.1016/j.hrthm.2012.05.022] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/21/2012] [Indexed: 11/30/2022]
|