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Pereira V, Salgado A, Oliveira J, Cerqueira S, Frias A, Fraga J, Roque S, Falcão A, Marques F, Neves N, Mano J, Reis R, Sousa N. In vivo biodistribution of carboxymethylchitosan/poly(amidoamine) dendrimer nanoparticles in rats. J BIOACT COMPAT POL 2011. [DOI: 10.1177/0883911511425567] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Carboxymethylchitosan/poly(amidoamine) (CMCht/PAMAM) dendrimer nanoparticles, comprised of a PAMAM dendrimer core grafted with chains of CMCht, have recently been proposed for intracellular drug delivery. In previous reports, these nanoparticles had lower levels of cytotoxicity when compared with traditional dendrimers. In this study, the short-term in vivo biodistribution of fluorescein isothiocyanate (FITC)-labeled CMCht/PAMAM dendrimer nanoparticles after intravenous (IV) injections in Wistar Han rats was determined. The brain, liver, kidney, and lung were collected at 24, 48, and 72 h after injection and stained with phalloidin–tetramethylrhodamine isothiocyanate (TRITC, red) and 4′,6-diamidino-2-phenylindole dihydrochloride (DAPI, blue) to trace the nanoparticles within these tissues. The liver, kidney, and lung were also stained for hematoxylin and eosin to assess any morphological alterations of these organs. CMCht/PAMAM dendrimer nanoparticles were observed within the vascular space and parenchyma of liver, kidney, and lung and in the choroid plexus, after each injection period. No particles were observed in the brain parenchyma, nor any apparent deleterious histological changes were observed within these organs. The CMCht/PAMAM dendrimer nanoparticles were stable in circulation for a period of up to 72 h, targeting the main organs/systems through internalization by the cells present in their parenchyma. These results provide positive indicators to their potential use in the future as intracellular drug delivery systems.
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Affiliation(s)
- V.H. Pereira
- Life and Health Sciences Research Institute (ICVS), School of Health Sciences, University of Minho, Braga, Portugal
- ICVS/3B’s, PT Government Associated Laboratory, Braga/Guimarães, Portugal
| | - A.J. Salgado
- Life and Health Sciences Research Institute (ICVS), School of Health Sciences, University of Minho, Braga, Portugal
- ICVS/3B’s, PT Government Associated Laboratory, Braga/Guimarães, Portugal
| | - J.M. Oliveira
- ICVS/3B’s, PT Government Associated Laboratory, Braga/Guimarães, Portugal
- 3B’s Research Group – Biomaterials, Biodegradables and Biomimetics, University Minho, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, Taipas, Guimarães, Portugal
| | - S.R. Cerqueira
- ICVS/3B’s, PT Government Associated Laboratory, Braga/Guimarães, Portugal
- 3B’s Research Group – Biomaterials, Biodegradables and Biomimetics, University Minho, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, Taipas, Guimarães, Portugal
| | - A.M. Frias
- ICVS/3B’s, PT Government Associated Laboratory, Braga/Guimarães, Portugal
- 3B’s Research Group – Biomaterials, Biodegradables and Biomimetics, University Minho, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, Taipas, Guimarães, Portugal
| | - J.S. Fraga
- Life and Health Sciences Research Institute (ICVS), School of Health Sciences, University of Minho, Braga, Portugal
- ICVS/3B’s, PT Government Associated Laboratory, Braga/Guimarães, Portugal
| | - S. Roque
- Life and Health Sciences Research Institute (ICVS), School of Health Sciences, University of Minho, Braga, Portugal
- ICVS/3B’s, PT Government Associated Laboratory, Braga/Guimarães, Portugal
| | - A.M. Falcão
- Life and Health Sciences Research Institute (ICVS), School of Health Sciences, University of Minho, Braga, Portugal
- ICVS/3B’s, PT Government Associated Laboratory, Braga/Guimarães, Portugal
| | - F. Marques
- Life and Health Sciences Research Institute (ICVS), School of Health Sciences, University of Minho, Braga, Portugal
- ICVS/3B’s, PT Government Associated Laboratory, Braga/Guimarães, Portugal
| | - N.M. Neves
- ICVS/3B’s, PT Government Associated Laboratory, Braga/Guimarães, Portugal
- 3B’s Research Group – Biomaterials, Biodegradables and Biomimetics, University Minho, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, Taipas, Guimarães, Portugal
| | - J.F. Mano
- ICVS/3B’s, PT Government Associated Laboratory, Braga/Guimarães, Portugal
- 3B’s Research Group – Biomaterials, Biodegradables and Biomimetics, University Minho, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, Taipas, Guimarães, Portugal
| | - R.L. Reis
- ICVS/3B’s, PT Government Associated Laboratory, Braga/Guimarães, Portugal
- 3B’s Research Group – Biomaterials, Biodegradables and Biomimetics, University Minho, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, Taipas, Guimarães, Portugal
| | - N. Sousa
- Life and Health Sciences Research Institute (ICVS), School of Health Sciences, University of Minho, Braga, Portugal
- ICVS/3B’s, PT Government Associated Laboratory, Braga/Guimarães, Portugal
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Beilvert A, Cormode DP, Chaubet F, Briley-Saebo KC, Mani V, Mulder WJM, Vucic E, Toussaint JF, Letourneur D, Fayad ZA. Tyrosine polyethylene glycol (PEG)-micelle magnetic resonance contrast agent for the detection of lipid rich areas in atherosclerotic plaque. Magn Reson Med 2010; 62:1195-201. [PMID: 19780153 DOI: 10.1002/mrm.22103] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Vulnerable or high-risk atherosclerotic plaques often exhibit large lipid cores and thin fibrous caps that can lead to deadly vascular events when they rupture. In this study, polyethylene glycol (PEG)-micelles that incorporate a gadolinium diethylenetriamine pentaacetic acid (Gd-DTPA) amphiphile were used as an MR contrast agent. In an approach inspired by lipoproteins, the micelles were functionalized with tyrosine residues, an aromatic, lipophilic amino acid, to reach the lipid-rich areas of atherosclerotic plaque in a highly efficient manner. These micelles were applied to apolipoprotein E(-/-) (ApoE(-/-)) mice as a model of atherosclerosis. The abdominal aortas of the animals were imaged using T(1)-weighted (T(1)W) high-resolution MRI at 9.4T before and up to 48 h after the administration of the micelles. PEG-micelles modified with 15% tyrosine residues yielded a significant enhancement of the abdominal aortic wall at 6 and 24 h postinjection (pi) as compared to unmodified micelles. Fluorescence microscopy on histological sections of the abdominal aorta showed a correlation between lipid-rich areas and the distribution of the functionalized contrast agent in plaque. Using a simple approach, we demonstrated that lipid-rich areas in atherosclerotic plaque of ApoE(-/-) mice can be detected by MRI using Gd-DTPA micelles.
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Affiliation(s)
- Anne Beilvert
- INSERM U698, Cardiovascular Bioengineering, CHU X. Bichat, University Paris 7, Paris, France
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Chen Z, Yu D, Wang S, Zhang N, Ma C, Lu Z. Biocompatible Nanocomplexes for Molecular Targeted MRI Contrast Agent. NANOSCALE RESEARCH LETTERS 2009; 4:618-626. [PMID: 20596430 PMCID: PMC2894099 DOI: 10.1007/s11671-009-9286-x] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/16/2008] [Accepted: 03/05/2009] [Indexed: 05/29/2023]
Abstract
Accurate diagnosis in early stage is vital for the treatment of Hepatocellular carcinoma. The aim of this study was to investigate the potential of poly lactic acid-polyethylene glycol/gadolinium-diethylenetriamine-pentaacetic acid (PLA-PEG/Gd-DTPA) nanocomplexes using as biocompatible molecular magnetic resonance imaging (MRI) contrast agent. The PLA-PEG/Gd-DTPA nanocomplexes were obtained using self-assembly nanotechnology by incubation of PLA-PEG nanoparticles and the commercial contrast agent, Gd-DTPA. The physicochemical properties of nanocomplexes were measured by atomic force microscopy and photon correlation spectroscopy. The T(1)-weighted MR images of the nanocomplexes were obtained in a 3.0 T clinical MR imager. The stability study was carried out in human plasma and the distribution in vivo was investigated in rats. The mean size of the PLA-PEG/Gd-DTPA nanocomplexes was 187.9 +/- 2.30 nm, and the polydispersity index was 0.108, and the zeta potential was -12.36 +/- 3.58 mV. The results of MRI test confirmed that the PLA-PEG/Gd-DTPA nanocomplexes possessed the ability of MRI, and the direct correlation between the MRI imaging intensities and the nano-complex concentrations was observed (r = 0.987). The signal intensity was still stable within 2 h after incubation of the nanocomplexes in human plasma. The nanocomplexes gave much better image contrast effects and longer stagnation time than that of commercial contrast agent in rat liver. A dose of 0.04 mmol of gadolinium per kilogram of body weight was sufficient to increase the MRI imaging intensities in rat livers by five-fold compared with the commercial Gd-DTPA. PLA-PEG/Gd-DTPA nanocomplexes could be prepared easily with small particle sizes. The nanocomplexes had high plasma stability, better image contrast effect, and liver targeting property. These results indicated that the PLA-PEG/Gd-DTPA nanocomplexes might be potential as molecular targeted imaging contrast agent.
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Affiliation(s)
- Zhijin Chen
- School of Pharmaceutical Science, Shandong University, 44 Wenhua Xi Road, 250012, Ji’nan, People’s Republic of China
| | - Dexin Yu
- Department of Radiology Medicine, Affiliated Qilu Hospital, Shandong University, 44 Wenhua Xi Road, 250012, Ji’nan, People’s Republic of China
| | - Shaojie Wang
- School of Chemistry and Chemical Engineering, Shandong University, 27 Shanda Road, 250012, Ji’nan, People’s Republic of China
| | - Na Zhang
- School of Pharmaceutical Science, Shandong University, 44 Wenhua Xi Road, 250012, Ji’nan, People’s Republic of China
| | - Chunhong Ma
- Department of Radiology Medicine, Affiliated Qilu Hospital, Shandong University, 44 Wenhua Xi Road, 250012, Ji’nan, People’s Republic of China
| | - Zaijun Lu
- School of Chemistry and Chemical Engineering, Shandong University, 27 Shanda Road, 250012, Ji’nan, People’s Republic of China
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