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Rodrigues-Souza I, Pessatti JBK, da Silva LR, de Lima Bellan D, de Souza IR, Cestari MM, de Assis HCS, Rocha HAO, Simas FF, da Silva Trindade E, Leme DM. Protective potential of sulfated polysaccharides from tropical seaweeds against alkylating- and oxidizing-induced genotoxicity. Int J Biol Macromol 2022; 211:524-534. [PMID: 35577199 DOI: 10.1016/j.ijbiomac.2022.05.077] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2022] [Revised: 05/07/2022] [Accepted: 05/09/2022] [Indexed: 12/18/2022]
Abstract
Sulfated polysaccharides (SPs) from seaweeds are potential bioactive natural compounds, but their DNA protective activity is poorly explored. This article aimed to evaluate the genotoxic/antigenotoxic potentials of a sulfated heterofucan from brown seaweed Spatoglossum schröederi (Fucan A - FA) and a sulfated galactan from green seaweed Codium isthomocladum (3G4S) using in vitro Comet assay (alkaline and oxidative versions) with HepG2 cells. The antioxidant activity of these SPs was evaluated by total antioxidant capacity, radical scavenging, metal chelating, and antioxidant enzyme activity assays. Both SPs were not genotoxic. FA and 3G4S displayed strong antigenotoxic activity against oxidizing chemical (H2O2) but not against alkylating chemical (MMS). The DNA damage reduction after a pre-treatment of 72 h with these SPs was 81.42% to FA and 81.38% to 3G4S. In simultaneous exposure to FA or 3G4S with H2O2, HepG2 cells presented 48.04% and 55.41% of DNA damage reduction compared with the control, respectively. The antigenotoxicity of these SPs relates to direct antioxidant activity by blockage of the initiation step of the oxidative chain reaction. Therefore, we conclude that FA and 3G4S could be explored as functional natural compounds with antigenotoxic activity due to their great protection against oxidative DNA damage.
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Affiliation(s)
| | | | | | - Daniel de Lima Bellan
- Department of Cell Biology, Federal University of Paraná (UFPR), Curitiba, PR, Brazil
| | | | | | | | | | | | | | - Daniela Morais Leme
- Departament of Genetics, Federal University of Paraná (UFPR), Curitiba, PR, Brazil.
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2
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Antiviral strategies should focus on stimulating the biosynthesis of heparan sulfates, not their inhibition. Life Sci 2021; 277:119508. [PMID: 33865880 PMCID: PMC8046744 DOI: 10.1016/j.lfs.2021.119508] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2021] [Revised: 03/31/2021] [Accepted: 04/06/2021] [Indexed: 12/23/2022]
Abstract
Antiviral strategies for viruses that utilize proteoglycan core proteins (syndecans and glypicans) as receptors should focus on heparan sulfate (HS) biosynthesis rather than on inhibition of these sugar chains. Here, we show that heparin and certain xylosides, which exhibit in vitro viral entry inhibitory properties against HSV-1, HSV-2, HPV-16, HPV-31, HVB, HVC, HIV-1, HTLV-1, SARS-CoV-2, HCMV, DENV-1, and DENV-2, stimulated HS biosynthesis at the cell surface 2- to 3-fold for heparin and up to 10-fold for such xylosides. This is consistent with the hypothesis from a previous study that for core protein attachment, viruses are glycosylated at HS attachment sites (i.e., serine residues intended to receive the D-xylose molecule for initiating HS chains). Heparanase overexpression, endocytic entry, and syndecan shedding enhancement, all of which are observed during viral infection, lead to glycocalyx deregulation and appear to be direct consequences of this hypothesis. In addition to the appearance of type 2 diabetes and the degradation of HS observed during viral infection, we linked this hypothesis to that proposed in a previous publication.
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3
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Meneghetti MCZ, Deboni P, Palomino CMV, Braga LP, Cavalheiro RP, Viana GM, Yates EA, Nader HB, Lima MA. ER-Golgi dynamics of HS-modifying enzymes via vesicular trafficking is a critical prerequisite for the delineation of HS biosynthesis. Carbohydr Polym 2021; 255:117477. [PMID: 33436240 DOI: 10.1016/j.carbpol.2020.117477] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2020] [Revised: 11/27/2020] [Accepted: 11/30/2020] [Indexed: 10/22/2022]
Abstract
The cell surface and extracellular matrix polysaccharide, heparan sulfate (HS) conveys chemical information to control crucial biological processes. HS chains are synthesized in a non-template driven process mainly in the Golgi apparatus, involving a large number of enzymes capable of subtly modifying its substitution pattern, hence, its interactions and biological effects. Changes in the localization of HS-modifying enzymes throughout the Golgi were found to correlate with changes in the structure of HS, rather than protein expression levels. Following BFA treatment, the HS-modifying enzymes localized preferentially in COPII vesicles and at the trans-Golgi. Shortly after heparin treatment, the HS-modifying enzyme moved from cis to trans-Golgi, which coincided with increased HS sulfation. Finally, it was shown that COPI subunits and Sec24 gene expression changed. Collectively, these findings demonstrate that knowledge of the ER-Golgi dynamics of HS-modifying enzymes via vesicular trafficking is a critical prerequisite for the complete delineation of HS biosynthesis.
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Affiliation(s)
- Maria C Z Meneghetti
- Departamento de Bioquímica, Instituto de Farmacologia e Biologia Molecular, Escola Paulista de Medicina, Universidade Federal de São Paulo, Rua Três de Maio, 100, São Paulo, SP 04044-020, Brazil
| | - Paula Deboni
- Departamento de Bioquímica, Instituto de Farmacologia e Biologia Molecular, Escola Paulista de Medicina, Universidade Federal de São Paulo, Rua Três de Maio, 100, São Paulo, SP 04044-020, Brazil
| | - Carlos M V Palomino
- Departamento de Bioquímica, Instituto de Farmacologia e Biologia Molecular, Escola Paulista de Medicina, Universidade Federal de São Paulo, Rua Três de Maio, 100, São Paulo, SP 04044-020, Brazil
| | - Luiz P Braga
- Departamento de Bioquímica, Instituto de Farmacologia e Biologia Molecular, Escola Paulista de Medicina, Universidade Federal de São Paulo, Rua Três de Maio, 100, São Paulo, SP 04044-020, Brazil
| | - Renan P Cavalheiro
- Departamento de Bioquímica, Instituto de Farmacologia e Biologia Molecular, Escola Paulista de Medicina, Universidade Federal de São Paulo, Rua Três de Maio, 100, São Paulo, SP 04044-020, Brazil
| | - Gustavo M Viana
- Departamento de Bioquímica, Instituto de Farmacologia e Biologia Molecular, Escola Paulista de Medicina, Universidade Federal de São Paulo, Rua Três de Maio, 100, São Paulo, SP 04044-020, Brazil
| | - Edwin A Yates
- Departamento de Bioquímica, Instituto de Farmacologia e Biologia Molecular, Escola Paulista de Medicina, Universidade Federal de São Paulo, Rua Três de Maio, 100, São Paulo, SP 04044-020, Brazil; Department of Biochemistry and Systems Biology, ISMIB, University of Liverpool, Liverpool, L69 7ZB, UK
| | - Helena B Nader
- Departamento de Bioquímica, Instituto de Farmacologia e Biologia Molecular, Escola Paulista de Medicina, Universidade Federal de São Paulo, Rua Três de Maio, 100, São Paulo, SP 04044-020, Brazil
| | - Marcelo A Lima
- Departamento de Bioquímica, Instituto de Farmacologia e Biologia Molecular, Escola Paulista de Medicina, Universidade Federal de São Paulo, Rua Três de Maio, 100, São Paulo, SP 04044-020, Brazil; Molecular & Structural Biosciences, School of Life Sciences, Keele University, Huxley Building, Keele, Staffordshire, ST5 5BG, UK.
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4
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Laner-Plamberger S, Oeller M, Poupardin R, Krisch L, Hochmann S, Kalathur R, Pachler K, Kreutzer C, Erdmann G, Rohde E, Strunk D, Schallmoser K. Heparin Differentially Impacts Gene Expression of Stromal Cells from Various Tissues. Sci Rep 2019; 9:7258. [PMID: 31076619 PMCID: PMC6510770 DOI: 10.1038/s41598-019-43700-x] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2018] [Accepted: 04/29/2019] [Indexed: 12/11/2022] Open
Abstract
Pooled human platelet lysate (pHPL) is increasingly used as replacement of animal serum for manufacturing of stromal cell therapeutics. Porcine heparin is commonly applied to avoid clotting of pHPL-supplemented medium but the influence of heparin on cell behavior is still unclear. Aim of this study was to investigate cellular uptake of heparin by fluoresceinamine-labeling and its impact on expression of genes, proteins and function of human stromal cells derived from bone marrow (BM), umbilical cord (UC) and white adipose tissue (WAT). Cells were isolated and propagated using various pHPL-supplemented media with or without heparin. Flow cytometry and immunocytochemistry showed differential cellular internalization and lysosomal accumulation of heparin. Transcriptome profiling revealed regulation of distinct gene sets by heparin including signaling cascades involved in proliferation, cell adhesion, apoptosis, inflammation and angiogenesis, depending on stromal cell origin. The influence of heparin on the WNT, PDGF, NOTCH and TGFbeta signaling pathways was further analyzed by a bead-based western blot revealing most alterations in BM-derived stromal cells. Despite these observations heparin had no substantial effect on long-term proliferation and in vitro tri-lineage differentiation of stromal cells, indicating compatibility for clinically applied cell products.
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Affiliation(s)
- Sandra Laner-Plamberger
- Spinal Cord Injury and Tissue Regeneration Center Salzburg, Paracelsus Medical University of Salzburg, Salzburg, Austria.,Department of Transfusion Medicine, Paracelsus Medical University of Salzburg, Salzburg, Austria
| | - Michaela Oeller
- Spinal Cord Injury and Tissue Regeneration Center Salzburg, Paracelsus Medical University of Salzburg, Salzburg, Austria.,Department of Transfusion Medicine, Paracelsus Medical University of Salzburg, Salzburg, Austria
| | - Rodolphe Poupardin
- Spinal Cord Injury and Tissue Regeneration Center Salzburg, Paracelsus Medical University of Salzburg, Salzburg, Austria.,Cell Therapy Institute, Paracelsus Medical University of Salzburg, Salzburg, Austria
| | - Linda Krisch
- Spinal Cord Injury and Tissue Regeneration Center Salzburg, Paracelsus Medical University of Salzburg, Salzburg, Austria.,Department of Transfusion Medicine, Paracelsus Medical University of Salzburg, Salzburg, Austria
| | - Sarah Hochmann
- Spinal Cord Injury and Tissue Regeneration Center Salzburg, Paracelsus Medical University of Salzburg, Salzburg, Austria.,Cell Therapy Institute, Paracelsus Medical University of Salzburg, Salzburg, Austria
| | - Ravi Kalathur
- Spinal Cord Injury and Tissue Regeneration Center Salzburg, Paracelsus Medical University of Salzburg, Salzburg, Austria.,Cell Therapy Institute, Paracelsus Medical University of Salzburg, Salzburg, Austria.,Department for Biomedicine, University of Basel, Basel, Switzerland
| | - Karin Pachler
- Spinal Cord Injury and Tissue Regeneration Center Salzburg, Paracelsus Medical University of Salzburg, Salzburg, Austria.,GMP Unit, Paracelsus Medical University of Salzburg, Salzburg, Austria
| | - Christina Kreutzer
- Spinal Cord Injury and Tissue Regeneration Center Salzburg, Paracelsus Medical University of Salzburg, Salzburg, Austria.,Institute for Experimental Neuroregeneration, Paracelsus Medical University of Salzburg, Salzburg, Austria
| | | | - Eva Rohde
- Spinal Cord Injury and Tissue Regeneration Center Salzburg, Paracelsus Medical University of Salzburg, Salzburg, Austria.,Department of Transfusion Medicine, Paracelsus Medical University of Salzburg, Salzburg, Austria
| | - Dirk Strunk
- Spinal Cord Injury and Tissue Regeneration Center Salzburg, Paracelsus Medical University of Salzburg, Salzburg, Austria.,Cell Therapy Institute, Paracelsus Medical University of Salzburg, Salzburg, Austria
| | - Katharina Schallmoser
- Spinal Cord Injury and Tissue Regeneration Center Salzburg, Paracelsus Medical University of Salzburg, Salzburg, Austria. .,Department of Transfusion Medicine, Paracelsus Medical University of Salzburg, Salzburg, Austria.
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5
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Feuser PE, Arévalo JMC, Junior EL, Rossi GR, da Silva Trindade E, Rocha MEM, Jacques AV, Ricci-Júnior E, Santos-Silva MC, Sayer C, de Araújo PHH. Increased cellular uptake of lauryl gallate loaded in superparamagnetic poly(methyl methacrylate) nanoparticles due to surface modification with folic acid. JOURNAL OF MATERIALS SCIENCE. MATERIALS IN MEDICINE 2016; 27:185. [PMID: 27787810 DOI: 10.1007/s10856-016-5796-0] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/20/2016] [Accepted: 10/13/2016] [Indexed: 06/06/2023]
Abstract
Lauryl gallate loaded in superparamagnetic poly(methyl methacrylate) nanoparticles surface modified with folic acid were synthesized by miniemulsion polymerization in just one step. In vitro biocompatibility and cytotoxicity assays on L929 (murine fibroblast), human red blood, and HeLa (uterine colon cancer) cells were performed. The effect of folic acid at the nanoparticles surface was evaluated through cellular uptake assays in HeLa cells. Results showed that the presence of folic acid did not affect substantially the polymer particle size (~120 nm), the superparamagnetic behavior, the encapsulation efficiency of lauryl gallate (~87 %), the Zeta potential (~38 mV) of the polymeric nanoparticles or the release profile of lauryl gallate. The release profile of lauryl gallate from superparamagnetic poly(methyl methacrylate) nanoparticles presented an initial burst effect (0-1 h) followed by a slow and sustained release, indicating a biphasic release system. Lauryl gallate loaded in superparamagnetic poly(methyl methacrylate) nanoparticles with folic acid did not present cytotoxicity effects on L929 and human red blood cells. However, free lauryl gallate presented significant cytotoxic effects on L929 and human red blood cells at all tested concentrations. The presence of folic acid increased the cytotoxicity of lauryl gallate loaded in nanoparticles on HeLa cells due to a higher cellular uptake when HeLa cells were incubated at 37 °C. On the other hand, when the nanoparticles were incubated at low temperature (4 °C) cellular uptake was not observed, suggesting that the uptake occurred by folate receptor mediated energy-dependent endocytosis. Based on presented results our work suggests that this carrier system can be an excellent alternative in targeted drug delivery by folate receptor.
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Affiliation(s)
- Paulo Emilio Feuser
- Department of Chemical Engineering and Food Engineering, Federal University of Santa Catarina, Florianópolis, Brazil
| | | | - Enio Lima Junior
- Laboratório de Resonancias Magnéticas, Centro Atómico Bariloche & CONICET, San Carlos de Bariloche, Argentina
| | | | | | | | - Amanda Virtuoso Jacques
- Department of Clinical Analyses, Federal University of Santa Catarina, Florianópolis, Brazil
| | - Eduardo Ricci-Júnior
- Department of Pharmacy, Federal University of Rio Janeiro, Rio de Janeiro, Brazil
| | | | - Claudia Sayer
- Department of Chemical Engineering and Food Engineering, Federal University of Santa Catarina, Florianópolis, Brazil
| | - Pedro H Hermes de Araújo
- Department of Chemical Engineering and Food Engineering, Federal University of Santa Catarina, Florianópolis, Brazil.
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6
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Anti-angiogenic activity of heparin functionalised cerium oxide nanoparticles. Biomaterials 2013; 34:8808-18. [DOI: 10.1016/j.biomaterials.2013.07.083] [Citation(s) in RCA: 69] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2013] [Accepted: 07/23/2013] [Indexed: 12/11/2022]
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7
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Ting SRS, Whitelock JM, Tomic R, Gunawan C, Teoh WY, Amal R, Lord MS. Cellular uptake and activity of heparin functionalised cerium oxide nanoparticles in monocytes. Biomaterials 2013; 34:4377-86. [PMID: 23478040 DOI: 10.1016/j.biomaterials.2013.02.042] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2013] [Accepted: 02/14/2013] [Indexed: 11/28/2022]
Abstract
Cerium oxide nanoparticles (nanoceria) are effective in scavenging intracellular reactive oxygen species (ROS). In this study nanoceria synthesized by flame spray pyrolysis (dXRD = 12 nm) were functionalised with heparin via an organosilane linker, 3-aminopropyltriethoxysilane. Nanoceria were functionalised with approximately 130 heparin molecules per nanoparticle as determined by thermo gravimetric analysis. Heparin functionalised nanoceria were more effectively internalised by the human monocyte cell line, U937, and U937 cells that had been activated with phorbol 12 myristate 13-acetate (PMA) than bare nanoceria. The heparin functionalised nanoceria were also more effective in scavenging ROS than nanoceria in both activated and unactivated U937 cells. Heparin coupled nanoceria were found to be biologically active due to their ability to bind fibroblast growth factor 2 and signal through FGF receptor 1. Additionally, the heparin-coupled nanoceria, once internalised by the cells, were found to be degraded by 48 h. Together these data demonstrated that heparin enhanced the biological properties of nanoceria in terms of cellular uptake and ROS scavenging, while the nanoceria themselves were more effective at delivering heparin intracellularly than exposing cells to heparin in solution.
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Affiliation(s)
- S R Simon Ting
- Graduate School of Biomedical Engineering, The University of New South Wales, Sydney, NSW 2052, Australia
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8
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Heparin-integrin interaction in endothelial cells: Downstream signaling and heparan sulfate expression. J Cell Physiol 2013; 227:2740-9. [DOI: 10.1002/jcp.23018] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2011] [Accepted: 09/01/2011] [Indexed: 12/14/2022]
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9
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Nowatzki J, Sene RV, Paludo KS, Rizzo LE, Souza-Fonseca-Guimarães F, Veiga SS, Nader HB, Franco CRC, Trindade ES. Brown spider (Loxosceles intermedia) venom triggers endothelial cells death by anoikis. Toxicon 2012; 60:396-405. [DOI: 10.1016/j.toxicon.2012.04.333] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2011] [Revised: 03/31/2012] [Accepted: 04/04/2012] [Indexed: 01/23/2023]
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10
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Nowatzki J, de Sene RV, Paludo KS, Veiga SS, Oliver C, Jamur MC, Nader HB, Trindade ES, Franco CRC. Brown spider venom toxins interact with cell surface and are endocytosed by rabbit endothelial cells. Toxicon 2010; 56:535-43. [DOI: 10.1016/j.toxicon.2010.03.027] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2009] [Revised: 02/19/2010] [Accepted: 03/24/2010] [Indexed: 11/25/2022]
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11
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Paredes-Gamero EJ, Medeiros VP, Farias EHC, Justo GZ, Trindade ES, Andrade-Lopes AL, Godinho RO, de Miranda A, Ferreira AT, Tersariol ILS, Nader HB. Heparin induces rat aorta relaxation via integrin-dependent activation of muscarinic M3 receptors. Hypertension 2010; 56:713-21. [PMID: 20805441 DOI: 10.1161/hypertensionaha.110.156877] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
Previous reports have shown that heparin may promote human hypotension and vascular relaxation by elevation of NO levels through unclear mechanisms. We hypothesized that endothelial muscarinic M(3) receptor activation mediates the heparin-induced vasodilation of rat aortic rings. The experiments were carried out using unfractionated heparin extracted from bovine intestinal mucosa, which elicited an endothelium and NO-dependent relaxation of aortic segments with maximal potency and efficacy (EC(50): 100±10 μmol/L; E(max): 41±3%). Atropine and 1,1-dimethyl-4-diphenylacetoxypiperidinium iodide inhibitors reduced the heparin-dependent relaxation, indicating that M(3) muscarinic receptor is involved in this phenomenon. However, no direct binding of heparin to muscarinic receptors was observed. More importantly, studies performed using the arginine-glycine-aspartic acid peptide and 1-(1,1-dimethylethyl)-3-(1-naphthalenyl)-1H-pyrazolo[3,4-day]pyrimidin-4-amine, an Src family inhibitor, reduced by 51% and 73% the heparin-dependent relaxation, respectively, suggesting the coupling of heparin and M(3) receptor through extracellular matrix molecules and integrin. Furthermore, unfractionated heparin induced activation of focal adhesion protein kinase, Src, and paxillin. Finally, fluorescence resonance energy transfer approach confirmed the interaction of the M(3) receptor to integrin. Taken together, these data demonstrate the participation of M(3) receptor and integrin in heparin-dependent relaxation of vascular smooth muscle. These results provide new insights into the molecular mechanism and potential pharmacological action of heparin in vascular physiology.
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Chung YI, Kim JC, Kim YH, Tae G, Lee SY, Kim K, Kwon IC. The effect of surface functionalization of PLGA nanoparticles by heparin- or chitosan-conjugated Pluronic on tumor targeting. J Control Release 2010; 143:374-82. [PMID: 20109508 DOI: 10.1016/j.jconrel.2010.01.017] [Citation(s) in RCA: 134] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2009] [Revised: 12/29/2009] [Accepted: 01/08/2010] [Indexed: 11/28/2022]
Abstract
The poly (lactide-co-glycolide) (PLGA)-based nanoparticles, coated by the heparin- or chitosan-Pluronic conjugate, were used to improve a relatively low tumor-targeting efficiency of the bare PLGA nanoparticles. The prepared nanoparticles were in the size range of 100-150nm, and the surface exposure of the functional moiety (heparin or chitosan) was confirmed by negatively or positively increased zeta potential values, respectively. The viability tests for both normal and tumor cells displayed minimal cytotoxicity of the nanoparticles. The stable surface coating, which was evident from no change in the size distribution profiles in spite of the surface charge changes in serum environment, effectively provided the desired functionalized surface that clearly enhanced the in vitro cellular uptake of the nanoparticles for both heparin and chitosan functionalization. The in vivo tumor model study, which was carried out in SCC7 tumor-bearing athymic mice, demonstrated that there was a limited, but positive effect of surface functionalization, more effective for chitosan functionalization. The accumulation of chitosan-functionalized PLGA nanoparticles in tumor was 2.4 folds higher than that of the control, PLGA nanoparticles coated with bare Pluronic, and the accumulation in liver was lower than the control. In the case of heparin functionalization, the mean value was 2.2 folds higher than that of the control, but the accumulation in liver was similar to that of the control. Therefore, the surface-functionalization by the chitosan- or heparin-conjugated Pluronic may be an effective approach for the hydrophobic nanoparticle systems aiming for the enhanced tumor imaging and therapy.
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Affiliation(s)
- Yong-Il Chung
- Department of Materials Science and Engineering, Gwangju Institute of Science and Technology, 261 Cheomdan-gwagiro, Buk-gu, Gwangju 500-712, South Korea
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13
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Boridy S, Takahashi H, Akiyoshi K, Maysinger D. The binding of pullulan modified cholesteryl nanogels to Aβ oligomers and their suppression of cytotoxicity. Biomaterials 2009; 30:5583-91. [DOI: 10.1016/j.biomaterials.2009.06.010] [Citation(s) in RCA: 50] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2009] [Accepted: 06/08/2009] [Indexed: 01/09/2023]
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