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Agotegaray MA, Campelo AE, Zysler RD, Gumilar F, Bras C, Gandini A, Minetti A, Massheimer VL, Lassalle VL. Magnetic nanoparticles for drug targeting: from design to insights into systemic toxicity. Preclinical evaluation of hematological, vascular and neurobehavioral toxicology. Biomater Sci 2018; 5:772-783. [PMID: 28256646 DOI: 10.1039/c6bm00954a] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
A simple two-step drug encapsulation method was developed to obtain biocompatible magnetic nanocarriers for the potential targeted treatment of diverse diseases. The nanodevice consists of a magnetite core coated with chitosan (Chit@MNPs) as a platform for diclofenac (Dic) loading as a model drug (Dic-Chit@MNPs). Mechanistic and experimental conditions related to drug incorporation and quantification are further addressed. This multi-disciplinary study aims to elucidate the toxicological impact of the MNPs at hematological, vascular, neurological and behavioral levels. Blood compatibility assays revealed that MNPs did not affect either erythrosedimentation rates or erythrocyte integrity at the evaluated doses (1, 10 and 100 μg mL-1). A microscopic evaluation of blood smears indicated that MNPs did not induce morphological changes in blood cells. Platelet aggregation was not affected by MNPs either and just a slight diminution was observed with Dic-Chit@MNPs, an effect possibly due to diclofenac. The examined formulations did not exert cytotoxicity on rat aortic endothelial cells and no changes in cell viability or their capacity to synthesize NO were observed. Behavioral and functional nervous system parameters in a functional observational battery were assessed after a subacute treatment of mice with Chit@MNPs. The urine pools of the exposed group were decreased. Nephritis and an increased number of megakaryocytes in the spleen were observed in the histopathological studies. Sub-acute exposure to Chit@MNPs did not produce significant changes in the parameters used to evaluate neurobehavioral toxicity. The aspects focused on within this manuscript are relevant at the pre-clinical level providing new and novel knowledge concerning the biocompatibility of magnetic nanodevices for biomedical applications.
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Affiliation(s)
- Mariela A Agotegaray
- INQUISUR, Departamento de Química, Universidad Nacional del Sur (UNS)-CONICET, Bahía Blanca, Argentina.
| | - Adrián E Campelo
- Instituto de Investigaciones Biológicas y Biomédicas del Sur (INBIOSUR-CONICET)-UNS Dpto. de Biología, Bioquímica y Farmacia, Universidad Nacional del Sur, Bahía Blanca, Argentina
| | - Roberto D Zysler
- CONICET - Centro Atómico Bariloche, Instituto Balseiro, S.C. de Bariloche, Argentina
| | - Fernanda Gumilar
- Instituto de Investigaciones Biológicas y Biomédicas del Sur (INBIOSUR-CONICET)-UNS Dpto. de Biología, Bioquímica y Farmacia, Universidad Nacional del Sur, Bahía Blanca, Argentina
| | - Cristina Bras
- Instituto de Investigaciones Biológicas y Biomédicas del Sur (INBIOSUR-CONICET)-UNS Dpto. de Biología, Bioquímica y Farmacia, Universidad Nacional del Sur, Bahía Blanca, Argentina
| | - Ariel Gandini
- Instituto de Investigaciones Bioquímicas de Bahía Blanca (INIBIBB-CONICET)-UNS Dpto. de Biología, Bioquímica y Farmacia, Universidad Nacional del Sur, Bahía Blanca, Argentina
| | - Alejandra Minetti
- Instituto de Investigaciones Biológicas y Biomédicas del Sur (INBIOSUR-CONICET)-UNS Dpto. de Biología, Bioquímica y Farmacia, Universidad Nacional del Sur, Bahía Blanca, Argentina
| | - Virginia L Massheimer
- Instituto de Investigaciones Biológicas y Biomédicas del Sur (INBIOSUR-CONICET)-UNS Dpto. de Biología, Bioquímica y Farmacia, Universidad Nacional del Sur, Bahía Blanca, Argentina
| | - Verónica L Lassalle
- INQUISUR, Departamento de Química, Universidad Nacional del Sur (UNS)-CONICET, Bahía Blanca, Argentina.
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Karabay AZ, Aktan F, Sunguroğlu A, Buyukbingol Z. Methylsulfonylmethane modulates apoptosis of LPS/IFN-γ-activated RAW 264.7 macrophage-like cells by targeting p53, Bax, Bcl-2, cytochrome c and PARP proteins. Immunopharmacol Immunotoxicol 2014; 36:379-89. [DOI: 10.3109/08923973.2014.956752] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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Maurer K, Binzen U, Mörz H, Bugert P, Schedel A, Treede RD, Greffrath W. Acetylsalicylic acid enhances tachyphylaxis of repetitive capsaicin responses in TRPV1-GFP expressing HEK293 cells. Neurosci Lett 2014; 563:101-6. [PMID: 24495935 DOI: 10.1016/j.neulet.2014.01.050] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2013] [Revised: 01/22/2014] [Accepted: 01/24/2014] [Indexed: 02/02/2023]
Abstract
Since many years acetylsalicylic acid (ASA) is known for its antithrombotic, antiphlogistic and analgesic effects caused by irreversible acetylation of cyclooxygenase. ASA also inhibits capsaicin- and heat-induced responses in cultured dorsal root ganglia (DRG) neurons, suggesting TRPV1 (transient receptor potential channel of the vanilloid receptor family, subtype 1) to be an additional target of ASA. We now studied the effect of ASA on heterologously expressed rat TRPV1 using calcium microfluorimetry. Capsaicin dose-dependently increased intracellular calcium with an EC50 of 0.29 μM in rTRPV1 expressing HEK293 cells. During repetitive stimulation the second response to capsaicin was reduced (53.4 ± 8.3% compared to vehicle control; p<0.005; Student's unpaired t-test) by 1μM ASA, a concentration much below the one needed to inhibit cyclooxygenase (IC50 of 35 μM in thromboxane B2 production assay). In contrast, calcium transients induced by a single stimulus of 0.3 or 1 μM capsaicin were not significantly reduced by 0.3 or 1 μM ASA. These data suggest that ASA increases the tachyphylaxis of rTRPV1 channel activation. Mechanisms are unknown and may be direct by e.g. stabilization of the desensitized state or indirect via inhibition of intracellular signaling pathways e.g. of the mitogen-activated protein kinase family (MAPK/ERK).
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Affiliation(s)
- Kristina Maurer
- Department of Neurophysiology, Centre for Biomedicine and Medical Technology Mannheim (CBTM), Medical Faculty Mannheim of the University of Heidelberg, Ludolf-Krehl-Str.13-17, D-68167 Mannheim, Germany
| | - Uta Binzen
- Department of Neurophysiology, Centre for Biomedicine and Medical Technology Mannheim (CBTM), Medical Faculty Mannheim of the University of Heidelberg, Ludolf-Krehl-Str.13-17, D-68167 Mannheim, Germany
| | - Handan Mörz
- Department of Neurophysiology, Centre for Biomedicine and Medical Technology Mannheim (CBTM), Medical Faculty Mannheim of the University of Heidelberg, Ludolf-Krehl-Str.13-17, D-68167 Mannheim, Germany
| | - Peter Bugert
- Institute of Transfusion Medicine and Immunology, Medical Faculty Mannheim of the University of Heidelberg, German Red Cross Blood Service of Baden-Württemberg-Hessen, Friedrich-Ebert-Straße 107, D-68167 Mannheim, Germany
| | - Angelika Schedel
- Institute of Transfusion Medicine and Immunology, Medical Faculty Mannheim of the University of Heidelberg, German Red Cross Blood Service of Baden-Württemberg-Hessen, Friedrich-Ebert-Straße 107, D-68167 Mannheim, Germany
| | - Rolf-Detlef Treede
- Department of Neurophysiology, Centre for Biomedicine and Medical Technology Mannheim (CBTM), Medical Faculty Mannheim of the University of Heidelberg, Ludolf-Krehl-Str.13-17, D-68167 Mannheim, Germany
| | - Wolfgang Greffrath
- Department of Neurophysiology, Centre for Biomedicine and Medical Technology Mannheim (CBTM), Medical Faculty Mannheim of the University of Heidelberg, Ludolf-Krehl-Str.13-17, D-68167 Mannheim, Germany.
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Abstract
Aspirin is widely used in the treatment of a number of clinical conditions. Although aspirin is being thought to be a relatively "safe" medicine, it also has some side effects, particularly the risk of bleeding which may be severe and lead to death. The mechanisms, however, are not totally understood. It has been reported recently that aspirin induces apoptosis in many cell types. Thus, the aim of the current study is to explore whether aspirin induces platelet apoptosis. The data show that mitochondrial transmembrane potential (ΔΨm) depolarizations and phosphatidylserine (PS) exposures were dose-dependently induced by aspirin in platelets. To further confirm that aspirin incurs platelet apoptosis, caspase-3 activity was measured in platelets, and the result indicated that aspirin induced caspase-3 activation. Furthermore, the mean volume of platelets incubated with aspirin was obviously reduced. Caspase inhibitor z-VAD-fmk inhibited aspirin induced apoptotic platelet shrinkage and ΔΨm depolarization, but had no effect on PS exposure. In addition, platelets incubated with cyclooxygenase inhibitor indomethacin did not incur ΔΨm depolarazation and PS exposure. Taken together, the data indicate that aspirin induces platelet apoptosis via caspase-3 activation.
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Affiliation(s)
- Lili Zhao
- School of Biological Science and Medical Engineering, Beijing University of Aeronautics and Astronautics , Beijing , China
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FILIP ROSANA, FERRARO GRACIELA, MANUELE MARIAGABRIELA, ANESINI CLAUDIA. ILEX BRASILIENSIS:PHYTOCHEMICAL COMPOSITION AND MECHANISM OF ACTION AGAINST THE PROLIFERATION OF A LYMPHOMA CELL LINE. J Food Biochem 2008. [DOI: 10.1111/j.1745-4514.2008.00196.x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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Protective Effects of Aspirin Against Oxidized LDL-induced Inflammatory Protein Expression in Human Endothelial Cells. J Cardiovasc Pharmacol 2008; 51:32-7. [DOI: 10.1097/fjc.0b013e318159ebaf] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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