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Sherin S, Balachandran S, Abraham A. Curcumin incorporated titanium dioxide nanoparticles as MRI contrasting agent for early diagnosis of atherosclerosis- rat model. Vet Anim Sci 2020; 10:100090. [PMID: 32734023 PMCID: PMC7386685 DOI: 10.1016/j.vas.2020.100090] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2019] [Revised: 12/05/2019] [Accepted: 01/06/2020] [Indexed: 02/07/2023] Open
Abstract
MRI is an excellent diagnostic technique for atherosclerosis in a non-invasive manner. Application of contrasting agents can improve its contrast through ionic properties. Macrophages and foam cells produce MCP-1 antibody, the sign of development of atherosclerosis. The work aims to develop novel curcumin incorporated titanium dioxide nanoparticles (CTNPs) conjugated with MCP-1 antibody with the specific targeting capability to macrophage-foam cells as contrasting agent for MRI. In vivo toxicity studies of Curcumin, TNPs and CTNPs were also done in Sprague dawley rats by GGT and ALP assays and found to be normal in comparison with control. Histopathology of aorta confirmed that the compound could not elicit a toxic effect in the target organ. Rats were fed with a high cholesterol diet to develop atherosclerotic foam cells and confirmed by Sudan IV staining and serum cholesterol level. CTNP-MCP-1 was injected into animals through tail vein and MRI scanning was done, gave contrasting images of atherosclerotic aorta in comparison with normal. Thus CTNPs can be used as a cost-effective contrasting tool for diagnosis of atherosclerosis at early stages in view of clinical imaging.
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Key Words
- ALP, Alkaline Phosphatase
- Atherosclerosis
- CTNPs, Curcumin incorporated Titanium dioxide Nanoparticles
- Curcumin
- DLS, Dynamic Light Scattering
- EDAX, Energy Dispersive Spectroscopy
- FTIR, Fourier Transform Infrared Spectroscopy
- GGT, Gamma Glutamyl Transpeptidase
- HDL, High Density Lipoproteins
- MCP-1, Monocyte Chemoattractant Protein1
- MRI
- MRI, Magnetic Resonance Imaging
- Macrophage
- SEM, Scanning Electron Microscope
- TC, Total Cholesterol
- TG, triglycerides
- TNPs, Titanium dioxide Nanoparticle
- Titanium dioxide
- XRD, X-ray Diffraction Spectroscopy
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Affiliation(s)
- Sainulabdeen Sherin
- Department of Biochemistry, University of Kerala, Kariavattom, Thiruvananthapuram 695581, India
| | | | - Annie Abraham
- Department of Biochemistry, University of Kerala, Kariavattom, Thiruvananthapuram 695581, India
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Grace JL, Schneider-Futschik EK, Elliott AG, Amado M, Truong NP, Cooper MA, Li J, Davis TP, Quinn JF, Velkov T, Whittaker MR. Exploiting Macromolecular Design To Optimize the Antibacterial Activity of Alkylated Cationic Oligomers. Biomacromolecules 2018; 19:4629-4640. [PMID: 30359516 DOI: 10.1021/acs.biomac.8b01317] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
There is growing interest in synthetic polymers which co-opt the structural features of naturally occurring antimicrobial peptides. However, our understanding of how macromolecular architecture affects antibacterial activity remains limited. To address this, we investigated whether varying architectures of a series of block and statistical co-oligomers influenced antibacterial and hemolytic activity. Cu(0)-mediated polymerization was used to synthesize oligomers constituting 2-(Boc-amino)ethyl acrylate units and either diethylene glycol ethyl ether acrylate (DEGEEA) or poly(ethylene glycol) methyl ether acrylate units with varying macromolecular architecture; subsequent deprotection produced primary amine functional oligomers. Further guanylation provided an additional series of antimicrobial candidates. Both chemical composition and macromolecular architecture were shown to affect antimicrobial activity. A broad spectrum antibacterial oligomer (containing guanidine moieties and DEGEEA units) was identified that possessed promising activity (MIC = 2 μg mL-1) toward both Gram-negative and Gram-positive bacteria. Bacterial membrane permeabilization was identified as an important contributor to the mechanism of action.
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Affiliation(s)
- James L Grace
- ARC Centre of Excellence in Convergent Bio-Nano Science and Technology , Monash University , 381 Royal Pde , Parkville , VIC 3052 , Australia.,Drug Delivery, Disposition and Dynamics Theme, Monash Institute of Pharmaceutical Sciences , Monash University , 381 Royal Pde , Parkville , VIC 3052 , Australia
| | - Elena K Schneider-Futschik
- Drug Delivery, Disposition and Dynamics Theme, Monash Institute of Pharmaceutical Sciences , Monash University , 381 Royal Pde , Parkville , VIC 3052 , Australia.,Department of Pharmacology & Therapeutics, School of Biomedical Sciences, Faculty of Medicine, Dentistry and Health Sciences , The University of Melbourne , Parkville , VIC 3010 , Australia
| | - Alysha G Elliott
- Institute of Molecular Biosciences , The University of Queensland , Brisbane , QLD 4072 , Australia
| | - Maite Amado
- Institute of Molecular Biosciences , The University of Queensland , Brisbane , QLD 4072 , Australia
| | - Nghia P Truong
- ARC Centre of Excellence in Convergent Bio-Nano Science and Technology , Monash University , 381 Royal Pde , Parkville , VIC 3052 , Australia.,Drug Delivery, Disposition and Dynamics Theme, Monash Institute of Pharmaceutical Sciences , Monash University , 381 Royal Pde , Parkville , VIC 3052 , Australia
| | - Matthew A Cooper
- Institute of Molecular Biosciences , The University of Queensland , Brisbane , QLD 4072 , Australia
| | - Jian Li
- Monash Biomedicine Discovery Institute, Department of Microbiology , Monash University , Clayton , Victoria 3800 , Australia
| | - Thomas P Davis
- ARC Centre of Excellence in Convergent Bio-Nano Science and Technology , Monash University , 381 Royal Pde , Parkville , VIC 3052 , Australia.,Drug Delivery, Disposition and Dynamics Theme, Monash Institute of Pharmaceutical Sciences , Monash University , 381 Royal Pde , Parkville , VIC 3052 , Australia.,Department of Chemistry , Warwick University , Gibbet Hill , Coventry , CV4 7AL , U.K
| | - John F Quinn
- ARC Centre of Excellence in Convergent Bio-Nano Science and Technology , Monash University , 381 Royal Pde , Parkville , VIC 3052 , Australia.,Drug Delivery, Disposition and Dynamics Theme, Monash Institute of Pharmaceutical Sciences , Monash University , 381 Royal Pde , Parkville , VIC 3052 , Australia
| | - Tony Velkov
- Drug Delivery, Disposition and Dynamics Theme, Monash Institute of Pharmaceutical Sciences , Monash University , 381 Royal Pde , Parkville , VIC 3052 , Australia.,Department of Pharmacology & Therapeutics, School of Biomedical Sciences, Faculty of Medicine, Dentistry and Health Sciences , The University of Melbourne , Parkville , VIC 3010 , Australia
| | - Michael R Whittaker
- ARC Centre of Excellence in Convergent Bio-Nano Science and Technology , Monash University , 381 Royal Pde , Parkville , VIC 3052 , Australia.,Drug Delivery, Disposition and Dynamics Theme, Monash Institute of Pharmaceutical Sciences , Monash University , 381 Royal Pde , Parkville , VIC 3052 , Australia
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Mahaling B, Srinivasarao DA, Raghu G, Kasam RK, Bhanuprakash Reddy G, Katti DS. A non-invasive nanoparticle mediated delivery of triamcinolone acetonide ameliorates diabetic retinopathy in rats. NANOSCALE 2018; 10:16485-16498. [PMID: 29897081 DOI: 10.1039/c8nr00058a] [Citation(s) in RCA: 44] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Diabetic retinopathy (DR) is a multifactorial manifestation associated with microvascular complications and is the fourth leading cause of visual impairment and blindness world-wide. Current day treatment of DR relies heavily on invasive techniques such as intravitreal injections of therapeutic agents. Unfortunately, intravitreal injections are associated with various complications such as intraocular bleeding, endophthalmitis, pain and discomfort resulting in poor patient compliance. To date, there has been no non-invasive drug delivery system reported for DR treatment. To address this, we developed a core-shell nanoparticle-based delivery system consisting of a hydrophobic polycaprolactone core and a hydrophilic Pluronic® F68 shell, loaded with triamcinolone acetonide and evaluated its efficacy in a DR rat model. After being administered as eye drops, the drug loaded nanoparticles significantly improved structural (retinal thickness and vascular health) and functional activity (rod and cone function) of retina as compared to DR controls that were treated with the drug alone or placebo nanoparticles. Furthermore, drug loaded nanoparticles reduced retinal inflammation as evidenced by a decrease in NF-κB, ICAM-1 and TNFα expression after 20 days of treatment. Similarly, a reduction in glial cell hyperplasia as evidenced by reduced GFAP expression, and a decrease in microvascular complications as evidenced by a decrease in VEGF secretion and microvascular tuft formation were observed in rat retinas after 40 days of treatment. The combined reduction in retinal inflammation and vascular abnormalities, both hallmarks of DR, demonstrates the potential of the nanoparticulate delivery system for use as a topical formulation for treating DR.
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Affiliation(s)
- Binapani Mahaling
- Department of Biological Sciences and Bioengineering, Indian Institute of Technology Kanpur, Kanpur-208016, India.
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Janeesh PA, Sami H, Dhanya CR, Sivakumar S, Abraham A. Biocompatibility and genotoxicity studies of polyallylamine hydrochloride nanocapsules in rats. RSC Adv 2014. [DOI: 10.1039/c4ra02418d] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022] Open
Abstract
PAH nanocapsule studies in rats showed that it is biocompatible and nongenotoxic for furtherin vivodrug-delivery studies.
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Affiliation(s)
- P. A. Janeesh
- School of Life Sciences
- Department of Biochemistry
- University of Kerala
- , India
| | - Haider Sami
- Department of Biological Sciences and Bioengineering
- Indian Institute of Technology Kanpur
- , India
| | - C. R. Dhanya
- School of Life Sciences
- Department of Biochemistry
- University of Kerala
- , India
| | - Sri Sivakumar
- Department of Chemical Engineering
- Unit of Excellence on Soft Nanofabrication
- Material Science Programme
- Institute of Technology Kanpur
- , India
| | - Annie Abraham
- School of Life Sciences
- Department of Biochemistry
- University of Kerala
- , India
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Shi XL, Wang Q, Hu K, Wang XM. Exploration on the safety assessment of nanomaterials in China. Interface Focus 2012; 2:387-92. [PMID: 23741614 PMCID: PMC3363025 DOI: 10.1098/rsfs.2012.0017] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2012] [Accepted: 02/28/2012] [Indexed: 12/31/2022] Open
Abstract
More and more applications of nanomaterials have been achieved in the biomedicine field. Numerous nanomedical devices, such as bone grafts with nano-hydroxyapatite and the silver-based anti-bacteria products, have been developed and have been trying to enter into the Chinese market. The State Food and Drug Administration of China (SFDA) is facing a critical challenge of how to explore and supervise the safety assessment of the nanomedical products. This paper briefly introduces the approval status of nanomedical products and the current advances of the safety assessment of nanomaterials in China.
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Affiliation(s)
- Xin-Li Shi
- Center for Medical Device Evaluation, State Food and Drug Administration, Beijing 100044, People's Republic of China
| | - Qiangbin Wang
- Division of Nanobiomedicine/i-LAB, Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences, Suzhou, Jiangsu 215123, People's Republic of China
| | - Kun Hu
- National Engineering Laboratory on Regenerative Implantable Medical Devices, Science City, Guangzhou 510663, People's Republic of China
| | - Xiu-Mei Wang
- National Engineering Laboratory on Regenerative Implantable Medical Devices, Science City, Guangzhou 510663, People's Republic of China
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He L, Yang L, Zhang ZR, Gong T, Deng L, Gu Z, Sun X. In vitro evaluation of the genotoxicity of a family of novel MeO-PEG-poly(D,L-lactic-co-glycolic acid)-PEG-OMe triblock copolymer and PLGA nanoparticles. NANOTECHNOLOGY 2009; 20:455102. [PMID: 19822931 DOI: 10.1088/0957-4484/20/45/455102] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
Despite the booming development of nanoparticle materials for pharmaceutical applications, studies on their genotoxicity are few. In our previous efforts to develop an intravenous nanoparticle material, a family of novel monomethoxy(polyethylene glycol)-poly(D,L-lactic-co-glycolic acid)-monomethoxy (PELGE) polymers was synthesized. The cytotoxicity and genotoxicity of nine kinds of selected blank PELGE and PLGA (poly(D,L-lactic and glycolic acid)) nanoparticles were evaluated using methyl thiazolyl tetrazolium (MTT), micronucleus (MN) and sister chromatid exchange (SCE) assays with or without the addition of a metabolic activation system (S9 mix), using Chinese hamster ovary (CHO) cells. The cytotoxicity of nanoparticles exhibited a dose-dependent response, with a concentration of 5 mg ml(-1) being the turning point. The frequencies of MN observed in samples treated with various nanoparticles were not statistically different from those seen in the negative controls in the presence or absence of the S9 mix. Also, no cell cycle delay was observed. The numbers of SCE per cell observed in samples treated with five kinds of PELGE nanoparticles were significantly greater than those found in the negative controls with or without the S9 mix. The discrepancies found in the two assays suggest that the five kinds of nanoparticles may produce only a weakly clastogenic response.
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Affiliation(s)
- Lili He
- Key Laboratory of Drug Targeting and Novel Drug Delivery Systems, Ministry of Education, West China School of Pharmacy, Sichuan University, Chengdu, Sichuan 610041, People's Republic of China
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