1
|
Ragheb RRT, Kim D, Bandyopadhyay A, Chahboune H, Bulutoglu B, Ezaldein H, Criscione JM, Fahmy TM. Induced clustered nanoconfinement of superparamagnetic iron oxide in biodegradable nanoparticles enhances transverse relaxivity for targeted theranostics. Magn Reson Med 2013; 70:1748-60. [PMID: 23401099 DOI: 10.1002/mrm.24622] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2012] [Revised: 11/12/2012] [Accepted: 12/11/2012] [Indexed: 01/03/2023]
Abstract
PURPOSE Combined therapeutic and diagnostic agents, "theranostics" are emerging valuable tools for noninvasive imaging and drug delivery. Here, we report on a solid biodegradable multifunctional nanoparticle that combines both features. METHODS Poly(lactide-co-glycolide) nanoparticles were engineered to confine superparamagnetic iron oxide contrast for magnetic resonance imaging while enabling controlled drug delivery and targeting to specific cells. To achieve this dual modality, fatty acids were used as anchors for surface ligands and for encapsulated iron oxide in the polymer matrix. RESULTS We demonstrate that fatty acid modified iron oxide prolonged retention of the contrast agent in the polymer matrix during degradative release of drug. Antibody-fatty acid surface modification facilitated cellular targeting and subsequent internalization in cells while inducing clustering of encapsulated fatty-acid modified superparamagnetic iron oxide during particle formulation. This induced clustered confinement led to an aggregation within the nanoparticle and, hence, higher transverse relaxivity, r2 , (294 mM(-1) s(-1) ) compared with nanoparticles without fatty-acid ligands (160 mM(-1) s(-1) ) and higher than commercially available superparamagnetic iron oxide nanoparticles (89 mM(-1) s(-1) ). CONCLUSION Clustering of superparamagnetic iron oxide in poly(lactide-co-glycolide) did not affect the controlled release of encapsulated drugs such as methotrexate or clodronate and their subsequent pharmacological activity, thus highlighting the full theranostic capability of our system.
Collapse
Affiliation(s)
- Ragy R T Ragheb
- Department of Biomedical Engineering, Yale University, New Haven, Connecticut, USA
| | | | | | | | | | | | | | | |
Collapse
|
2
|
Demento SL, Cui W, Criscione JM, Stern E, Tulipan J, Kaech SM, Fahmy TM. Role of sustained antigen release from nanoparticle vaccines in shaping the T cell memory phenotype. Biomaterials 2012; 33:4957-64. [PMID: 22484047 DOI: 10.1016/j.biomaterials.2012.03.041] [Citation(s) in RCA: 211] [Impact Index Per Article: 17.6] [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: 02/23/2012] [Accepted: 03/12/2012] [Indexed: 11/18/2022]
Abstract
Particulate vaccines are emerging promising technologies for the creation of tunable prophylactics against a wide variety of conditions. Vesicular and solid biodegradable polymer platforms, exemplified by liposomes and polyesters, respectively, are two of the most ubiquitous platforms in vaccine delivery studies. Here we directly compared the efficacy of each in a long-term immunization study and in protection against a model bacterial antigen. Immunization with poly(lactide-co-glycolide) (PLGA) nanoparticles elicited prolonged antibody titers compared to liposomes and alum. The magnitude of the cellular immune response was also highest in mice vaccinated with PLGA, which also showed a higher frequency of effector-like memory T cell phenotype, leading to an effective clearance of intracellular bacteria. The difference in performance of these two common particulate platforms is shown not to be due to material differences but appears to be connected to the kinetics of antigen delivery. Thus, this study highlights the importance of sustained antigen release mediated by particulate platforms and its role in the long-term appearance of effector memory cellular response.
Collapse
Affiliation(s)
- Stacey L Demento
- Department of Biomedical Engineering, Yale University, New Haven, CT-06511, USA
| | | | | | | | | | | | | |
Collapse
|
3
|
Criscione JM, Dobrucki LW, Zhuang ZW, Papademetris X, Simons M, Sinusas AJ, Fahmy TM. Development and application of a multimodal contrast agent for SPECT/CT hybrid imaging. Bioconjug Chem 2011; 22:1784-92. [PMID: 21851119 DOI: 10.1021/bc200162r] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
Hybrid or multimodality imaging is often applied in order to take advantage of the unique and complementary strengths of individual imaging modalities. This hybrid noninvasive imaging approach can provide critical information about anatomical structure in combination with physiological function or targeted molecular signals. While recent advances in software image fusion techniques and hybrid imaging systems have enabled efficient multimodal imaging, accessing the full potential of this technique requires development of a new toolbox of multimodal contrast agents that enhance the imaging process. Toward that goal, we report the development of a hybrid probe for both single photon emission computed tomography (SPECT) and X-ray computed tomography (CT) imaging that facilitates high-sensitivity SPECT and high spatial resolution CT imaging. In this work, we report the synthesis and evaluation of a novel intravascular, multimodal dendrimer-based contrast agent for use in preclinical SPECT/CT hybrid imaging systems. This multimodal agent offers a long intravascular residence time (t(1/2) = 43 min) and sufficient contrast-to-noise for effective serial intravascular and blood pool imaging with both SPECT and CT. The colocalization of the dendritic nuclear and X-ray contrasts offers the potential to facilitate image analysis and quantification by enabling correction for SPECT attenuation and partial volume errors at specified times with the higher resolution anatomic information provided by the circulating CT contrast. This may allow absolute quantification of intramyocardial blood volume and blood flow and may enable the ability to visualize active molecular targeting following clearance from the blood.
Collapse
Affiliation(s)
- Jason M Criscione
- Department of Biomedical Engineering, Yale University, New Haven, Connecticut, USA
| | | | | | | | | | | | | |
Collapse
|
4
|
Harrington JK, Chahboune H, Criscione JM, Li AY, Hibino N, Yi T, Villalona GA, Kobsa S, Meijas D, Duncan DR, Devine L, Papademetri X, Shin'oka T, Fahmy TM, Breuer CK. Determining the fate of seeded cells in venous tissue-engineered vascular grafts using serial MRI. FASEB J 2011; 25:4150-61. [PMID: 21846838 DOI: 10.1096/fj.11-185140] [Citation(s) in RCA: 48] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
A major limitation of tissue engineering research is the lack of noninvasive monitoring techniques for observations of dynamic changes in single tissue-engineered constructs. We use cellular magnetic resonance imaging (MRI) to track the fate of cells seeded onto functional tissue-engineered vascular grafts (TEVGs) through serial imaging. After in vitro optimization, murine macrophages were labeled with ultrasmall superparamagnetic iron oxide (USPIO) nanoparticles and seeded onto scaffolds that were surgically implanted as inferior vena cava interposition grafts in SCID/bg mice. Serial MRI showed the transverse relaxation times (T(2)) were significantly lower immediately following implantation of USPIO-labeled scaffolds (T(2) = 44 ± 6.8 vs. 71 ± 10.2 ms) but increased rapidly at 2 h to values identical to control implants seeded with unlabeled macrophages (T(2) = 63 ± 12 vs. 63 ± 14 ms). This strongly indicates the rapid loss of seeded cells from the scaffolds, a finding verified using Prussian blue staining for iron containing macrophages on explanted TEVGs. Our results support a novel paradigm where seeded cells are rapidly lost from implanted scaffolds instead of developing into cells of the neovessel, as traditionally thought. Our findings confirm and validate this paradigm shift while demonstrating the first successful application of noninvasive MRI for serial study of cellular-level processes in tissue engineering.
Collapse
Affiliation(s)
- Jamie K Harrington
- Interdepartmental Program in Vascular Biology and Therapeutics, Yale University School of Medicine, New Haven, CT 06510, USA
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
5
|
Vacic A, Criscione JM, Rajan NK, Stern E, Fahmy TM, Reed MA. Determination of molecular configuration by debye length modulation. J Am Chem Soc 2011; 133:13886-9. [PMID: 21815673 DOI: 10.1021/ja205684a] [Citation(s) in RCA: 64] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Silicon nanowire field effect transistors (FETs) have emerged as ultrasensitive, label-free biodetectors that operate by sensing bound surface charge. However, the ionic strength of the environment (i.e., the Debye length of the solution) dictates the effective magnitude of the surface charge. Here, we show that control of the Debye length determines the spatial extent of sensed bound surface charge on the sensor. We apply this technique to different methods of antibody immobilization, demonstrating different effective distances of induced charge from the sensor surface.
Collapse
Affiliation(s)
- Aleksandar Vacic
- Departments of Electrical, Yale University, New Haven, Connecticut 06511, United States.
| | | | | | | | | | | |
Collapse
|
6
|
Vacic A, Criscione JM, Stern E, Rajan NK, Fahmy T, Reed MA. Multiplexed SOI BioFETs. Biosens Bioelectron 2011; 28:239-42. [PMID: 21820303 DOI: 10.1016/j.bios.2011.07.025] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2011] [Revised: 07/07/2011] [Accepted: 07/13/2011] [Indexed: 02/07/2023]
Abstract
Nanoscale Field Effect Transistors have emerged as a promising technology for ultrasensitive, unlabeled diagnostic applications. However, their use as quantitative sensors has been problematic because of the need for individual sensor calibration. In this work we demonstrate an internal calibration scheme for multiplexed nanoribbon field effect sensors by utilizing the initial current rates rather than end point detection. A linear response is observed consistent with initial binding kinetics. Moreover, we are able to show that top-down fabrication techniques yield reproducible device results with minimal fluctuations, enabling internal calibration.
Collapse
Affiliation(s)
- Aleksandar Vacic
- Department of Electrical, Yale University, 15 Prospect St., New Haven, CT 06511, USA.
| | | | | | | | | | | |
Collapse
|
7
|
Robinson R, Viviano SR, Criscione JM, Williams CA, Jun L, Tsai JC, Lavik EB. Nanospheres delivering the EGFR TKI AG1478 promote optic nerve regeneration: the role of size for intraocular drug delivery. ACS Nano 2011; 5:4392-400. [PMID: 21619059 PMCID: PMC3136352 DOI: 10.1021/nn103146p] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Promoting nerve regeneration involves not only modulating the postinjury microenvironment but also ensuring survival of injured neurons. Sustained delivery of epidermal growth factor receptor (EGFR) tyrosine kinase inhibitors (TKIs) has been shown to promote the survival and regeneration of neurons, but systemic administration is associated with significant side effects. We fabricated poly(lactic-co-glycolic acid) (PLGA) microspheres and nanospheres containing the EGFR TKI 4-(3-chloroanilino)-6,7-dimethoxyquinazoline (AG1478) for intravitreal administration in a rat optic nerve crush injury model. Upon administration, less backflow from the injection site was observed when injecting nanospheres compared to microspheres. Two weeks after intravitreal delivery, we were able to detect microspheres and nanospheres in the vitreous using coumarin-6 fluorescence, but fewer microspheres were observed compared to the nanospheres. At four weeks only nanospheres could be detected. AG1478 microspheres and nanospheres promoted optic nerve regeneration at two weeks, and at four weeks evidence of regeneration was found only in the nanosphere-injected animals. This observation could be attributed to the ease of administration of the nanospheres versus the microspheres, which in turn led to an increased amount of spheres delivered to the vitreous in the nanosphere group compared to the microsphere group. These data provide evidence for use of PLGA nanospheres to deliver AG1478 intravitreally in a single administration to promote nerve regeneration.
Collapse
Affiliation(s)
- Rebecca Robinson
- Department of Biomedical Engineering, Yale University, New Haven, Connecticut, United States
| | - Stephen R. Viviano
- Yale Vision Core Facility, Yale University School of Medicine, New Haven, Connecticut, United States
| | - Jason M. Criscione
- Department of Biomedical Engineering, Yale University, New Haven, Connecticut, United States
| | - Cicely A. Williams
- Interdepartmental Neuroscience Program, Yale University, New Haven, Connecticut, United States
| | - Lin Jun
- Department of Ophthalmology and Visual Science, Yale University School of Medicine, New Haven, Connecticut, United States
| | - James C. Tsai
- Department of Ophthalmology and Visual Science, Yale University School of Medicine, New Haven, Connecticut, United States
| | - Erin B. Lavik
- Department of Biomedical Engineering, Case Western Reserve University, Room 309 Wickenden Building, 10900 Euclid Ave, Cleveland, OH 44106-7207, USA, Tel: 216-368-0400, Fax: 216-368-4969,
| |
Collapse
|
8
|
Stern E, Vacic A, Rajan NK, Criscione JM, Park J, Ilic BR, Mooney DJ, Reed MA, Fahmy TM. Label-free biomarker detection from whole blood. Nat Nanotechnol 2010; 5:138-42. [PMID: 20010825 PMCID: PMC2818341 DOI: 10.1038/nnano.2009.353] [Citation(s) in RCA: 242] [Impact Index Per Article: 17.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/11/2009] [Accepted: 10/15/2009] [Indexed: 05/17/2023]
Abstract
Label-free nanosensors can detect disease markers to provide point-of-care diagnosis that is low-cost, rapid, specific and sensitive. However, detecting these biomarkers in physiological fluid samples is difficult because of problems such as biofouling and non-specific binding, and the resulting need to use purified buffers greatly reduces the clinical relevance of these sensors. Here, we overcome this limitation by using distinct components within the sensor to perform purification and detection. A microfluidic purification chip simultaneously captures multiple biomarkers from blood samples and releases them, after washing, into purified buffer for sensing by a silicon nanoribbon detector. This two-stage approach isolates the detector from the complex environment of whole blood, and reduces its minimum required sensitivity by effectively pre-concentrating the biomarkers. We show specific and quantitative detection of two model cancer antigens from a 10 microl sample of whole blood in less than 20 min. This study marks the first use of label-free nanosensors with physiological solutions, positioning this technology for rapid translation to clinical settings.
Collapse
Affiliation(s)
- Eric Stern
- Yale University, School of Engineering and Applied Science, Department of, Biomedical, New Haven, CT 06511
| | - Aleksandar Vacic
- Yale University, School of Engineering and Applied Science, Department of, Electrical, New Haven, CT 06511
| | - Nitin K. Rajan
- Yale University, School of Engineering and Applied Science, Department of, Electrical, New Haven, CT 06511
| | - Jason M. Criscione
- Yale University, School of Engineering and Applied Science, Department of, Biomedical, New Haven, CT 06511
| | - Jason Park
- Yale University, School of Engineering and Applied Science, Department of, Biomedical, New Haven, CT 06511
| | - Bojan R. Ilic
- Cornell Nanofabrication Facility, Cornell University, Ithaca, NY 14853
| | - David J. Mooney
- Harvard University, School of Engineering and Applied Science, Department of Bioengineering, Cambridge, MA 02138
| | - Mark A. Reed
- Yale University, School of Engineering and Applied Science, Department of, Electrical, New Haven, CT 06511
- Yale University, School of Engineering and Applied Science, Department of, Applied Physics, New Haven, CT 06511
| | - Tarek M. Fahmy
- Yale University, School of Engineering and Applied Science, Department of, Biomedical, New Haven, CT 06511
- Yale University, School of Engineering and Applied Science, Department of, Chemical Engineering, New Haven, CT 06511
| |
Collapse
|
9
|
Bertram JP, Jay SM, Hynes SR, Robinson R, Criscione JM, Lavik EB. Functionalized poly(lactic-co-glycolic acid) enhances drug delivery and provides chemical moieties for surface engineering while preserving biocompatibility. Acta Biomater 2009; 5:2860-71. [PMID: 19433141 PMCID: PMC2749076 DOI: 10.1016/j.actbio.2009.04.012] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.6] [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: 11/14/2008] [Revised: 02/17/2009] [Accepted: 04/17/2009] [Indexed: 11/26/2022]
Abstract
Poly(lactic-co-glycolic acid) (PLGA) is one of the more widely used polymers for biomedical applications. Nonetheless, PLGA lacks chemical moieties that facilitate cellular interactions and surface chemistries. Furthermore, incorporation of hydrophilic molecules is often problematic. The integration of polymer functionalities would afford the opportunity to alter device characteristics, thereby enabling control over drug interactions, conjugations and cellular phenomena. In an effort to introduce amine functionalities and improve polymer versatility, we synthesized two block copolymers (PLGA-PLL 502H and PLGA-PLL 503H) composed of PLGA and poly(epsilon-carbobenzoxy-l-lysine) utilizing dicyclohexyl carbodiimide coupling. PLGA-PLL microspheres encapsulated approximately sixfold (502H) and threefold (503H) more vascular endothelial growth factor, and 41% (503H) more ciliary neurotrophic factor than their PLGA counterparts. While the amine functionalities were amenable to the delivery of large molecules and surface conjugations, they did not compromise polymer biocompatibility. With the versatile combination of properties, biocompatibility and ease of synthesis, these block copolymers have the potential for diverse utility in the fields of drug delivery and tissue engineering.
Collapse
Affiliation(s)
| | | | | | | | | | - Erin B. Lavik
- Prof E.B. Lavik, Department of Biomedical Engineering, Yale University, 55 Prospect St, New Haven, CT 06520 (USA), Phone: 203-432-4265, Fax: 203-432-0030, E-mail:
| |
Collapse
|
10
|
Criscione JM, Le BL, Stern E, Brennan M, Rahner C, Papademetris X, Fahmy TM. Self-assembly of pH-responsive fluorinated dendrimer-based particulates for drug delivery and noninvasive imaging. Biomaterials 2009; 30:3946-55. [DOI: 10.1016/j.biomaterials.2009.04.014] [Citation(s) in RCA: 116] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2009] [Accepted: 04/13/2009] [Indexed: 11/16/2022]
|