1
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Caro C, Florek A, Hahn M, Marx M. Color Doppler Sonography Assisted Subcutaneous Mastectomy with Inferior Pedicled Nipple-Areola Complex in Female-to-Male Transsexuals: A Retrospective Cohort Analysis. Aesthetic Plast Surg 2024; 48:1126-1132. [PMID: 35701593 DOI: 10.1007/s00266-022-02945-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2022] [Accepted: 05/09/2022] [Indexed: 11/01/2022]
Abstract
BACKGROUND The surgical goals of gender reassignment surgery of the breast in female-to male transsexuals (FMT) is the aesthetic shaping of a male thoracic wall with minimal scarring, while preserving the sensitivity of the nipple-areola complex (NAC). For large and ptotic breasts, we perform a mastectomy over an inframammary access with inferior pedicled NAC under color Doppler visualization of the perforators. This paper presents the technique, including complications and assessment of quality of life, as part of a unicentric analysis. METHODS This was a retrospective analysis of 23 patients (46 mastectomies) performed between September 2014 and September 2020. The complication rate and the number of corrective surgeries were recorded for quality assessment. A semiquantitative score was used to evaluate aesthetic outcome, nipple sensitivity, quality of life, and sexuality. RESULTS A total of 46 mastectomies were performed in 23 patients. The patient survey showed high patient satisfaction. Loss of nipple sensitivity was observed after one mastectomy (2.17%). In 91.67% of cases, patients reported that their appearance reflected how they feel on the inside. In 75% of cases, patients reported feeling equal to other men. The overall complication rate was 10.87%. Shape correction due to persistent excess of volume was rare (2.17%, equivalent to one mastectomy). CONCLUSION Subcutaneous mastectomy with inferior nipple pedicle can be performed with a high degree of safety and satisfaction in FMT. Color Doppler-guided visualization of the perforator vessels is helpful in allowing a thin pedicle preparation, thus reducing the need for secondary surgeries to optimize the shape. LEVEL OF EVIDENCE IV This journal requires that authors assign a level of evidence to each article. For a full description of these Evidence-Based Medicine ratings, please refer to the Table of Contents or the online Instructions to Authors www.springer.com/00266 .
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Affiliation(s)
- C Caro
- Department of Plastic, Reconstructive and Breast Surgery, Elbland Hospital Radebeul, Heinrich-Zille-Str. 13, 01445, Radebeul, Germany.
| | - A Florek
- Department of Plastic, Reconstructive and Breast Surgery, Elbland Hospital Radebeul, Heinrich-Zille-Str. 13, 01445, Radebeul, Germany
| | - M Hahn
- Department of Women's Health, University of Tübingen, Tübingen, Germany
| | - M Marx
- Department of Plastic, Reconstructive and Breast Surgery, Elbland Hospital Radebeul, Heinrich-Zille-Str. 13, 01445, Radebeul, Germany
- Department of Women's Health, University of Tübingen, Tübingen, Germany
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2
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Brokate-Llanos AM, Sanchez-Ibañez M, Pérez-Jiménez MM, Monje-Moreno JM, Gómez-Marín C, Caro C, Vivar-Rios C, Moreno-Mateo MA, García-Martín ML, Muñoz MJ, Royo JL. Ribonucleotide reductase inhibition improves the symptoms of a Caenorhabditis elegans model of Alzheimer's Disease. G3 (Bethesda) 2024:jkae040. [PMID: 38412549 DOI: 10.1093/g3journal/jkae040] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/23/2023] [Revised: 12/23/2023] [Accepted: 01/19/2024] [Indexed: 02/29/2024]
Abstract
Alzheimer's disease is the main cause of aging-associated dementia, for which there is no effective treatment. In this work, we reanalyze the information of a previous Genome Wide Association Study, using a new pipeline design to identify novel potential drugs. With this approach, ribonucleoside-diphosphate reductase gene (RRM2B) emerged as a candidate target and its inhibitor, 2', 2'-difluoro 2'deoxycytidine (Gemcitabine), as a potential pharmaceutical drug against Alzheimer's disease. We functionally verified the effect of inhibiting the RRM2B homologue, rnr-2, in an Alzheimer's model of Caenorhabditis elegans, which accumulates human Aβ1-42 peptide to an irreversible paralysis. RNA interference against rnr-2 and also treatment with 200 ng/ml of Gemcitabine, showed animprovement of the phenotype. Gemcitabine treatment increased the intracellular ATP level 3.03 times, which may point to its mechanism of action. Gemcitabine has been extensively used in humans for cancer treatment but at higher concentration. The 200 ng/ml concentration did not exert a significant effect over cell cycle, or affected cell viability when assayed in microglia N13 cell line. Thus, inhibitory drug of the RRM2B activity could be of potential use to treat Alzheimer's disease and particularly Gemcitabine might be considered as a promising candidate to be repurposed for its treatment.
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Affiliation(s)
- Ana M Brokate-Llanos
- Centro Andaluz de Biologia del Desarrollo. University Pablo de Olavide-CISC-Junta de Andalucía. Ctra Utrera Km 1. 41013 Sevilla. Spain
| | - Mireya Sanchez-Ibañez
- Department of Surgery, Immunology and Biochemistry. School of Medicine, University of Malaga. Boulevar Louis Pasteur s/n. 29010 Málaga. Spain
| | - Mercedes M Pérez-Jiménez
- Centro Andaluz de Biologia del Desarrollo. University Pablo de Olavide-CISC-Junta de Andalucía. Ctra Utrera Km 1. 41013 Sevilla. Spain
| | - José M Monje-Moreno
- Centro Andaluz de Biologia del Desarrollo. University Pablo de Olavide-CISC-Junta de Andalucía. Ctra Utrera Km 1. 41013 Sevilla. Spain
| | - Carlos Gómez-Marín
- Centro Andaluz de Biologia del Desarrollo. University Pablo de Olavide-CISC-Junta de Andalucía. Ctra Utrera Km 1. 41013 Sevilla. Spain
| | - Carlos Caro
- BIONAND, Andalusian Centre for Nanomedicine and Biotechnology (Junta de Andalucía-Universidad de Málaga), 29590 Málaga, Spain
| | - Carlos Vivar-Rios
- Department of Surgery, Immunology and Biochemistry. School of Medicine, University of Malaga. Boulevar Louis Pasteur s/n. 29010 Málaga. Spain
| | - Miguel A Moreno-Mateo
- Centro Andaluz de Biologia del Desarrollo. University Pablo de Olavide-CISC-Junta de Andalucía. Ctra Utrera Km 1. 41013 Sevilla. Spain
| | - María L García-Martín
- BIONAND, Andalusian Centre for Nanomedicine and Biotechnology (Junta de Andalucía-Universidad de Málaga), 29590 Málaga, Spain
| | - Manuel J Muñoz
- Centro Andaluz de Biologia del Desarrollo. University Pablo de Olavide-CISC-Junta de Andalucía. Ctra Utrera Km 1. 41013 Sevilla. Spain
| | - José L Royo
- Department of Surgery, Immunology and Biochemistry. School of Medicine, University of Malaga. Boulevar Louis Pasteur s/n. 29010 Málaga. Spain
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3
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Caro C, Guzzi C, Moral-Sánchez I, Urbano-Gámez JD, Beltrán AM, García-Martín ML. Smart Design of ZnFe and ZnFe@Fe Nanoparticles for MRI-tracked Magnetic Hyperthermia Therapy: Challenging Classical Theories of Nanoparticles Growth and Nanomagnetism. Adv Healthc Mater 2024:e2304044. [PMID: 38303644 DOI: 10.1002/adhm.202304044] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [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: 11/17/2023] [Revised: 01/18/2024] [Indexed: 02/03/2024]
Abstract
Iron Oxide Nanoparticles (IONPs) hold the potential to exert significant influence on fighting cancer through their theranostics capabilities as contrast agents (CAs) for magnetic resonance imaging (MRI) and as mediators for magnetic hyperthermia (MH). In addition, these capabilities can be improved by doping IONPs with other elements. In this work, we report the synthesis and characterization of single-core and alloy ZnFe novel magnetic nanoparticles (MNPs), with improved magnetic properties and more efficient magnetic-to-heat conversion. Remarkably, our results challenge classical nucleation and growth theories, which cannot fully predict the final size/shape of these nanoparticles and, consequently, their magnetic properties, implying the need for further studies to better understand the nanomagnetism phenomenon. On the other hand, leveraging the enhanced properties of these new NPs, successful tumor therapy by MH was achieved following their intravenous administration and tumor accumulation via the EPR effect. Notably, these results were obtained using a single low dose of MNPs and a single exposure to clinically suitable alternating magnetic fields (AMF). Therefore, as far as we are aware, we demonstrate, for the first time, the successful application of intravenously administered MNPs for MRI-tracked MH tumor therapy in passively targeted tumor xenografts using clinically suitable conditions. This article is protected by copyright. All rights reserved.
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Affiliation(s)
- Carlos Caro
- Biomedical Magnetic Resonance Laboratory-BMRL, Andalusian Public Foundation Progress and Health-FPS, Seville, Spain
- Instituto de Investigación Biomédica de Málaga y Plataforma en Nanomedicina (IBIMA Plataforma BIONAND), Universidad de Málaga, C/Severo Ochoa, 35, Malaga, 29590, Spain
| | - Cinzia Guzzi
- Biomedical Magnetic Resonance Laboratory-BMRL, Andalusian Public Foundation Progress and Health-FPS, Seville, Spain
- Instituto de Investigación Biomédica de Málaga y Plataforma en Nanomedicina (IBIMA Plataforma BIONAND), Universidad de Málaga, C/Severo Ochoa, 35, Malaga, 29590, Spain
| | - Irene Moral-Sánchez
- Biomedical Magnetic Resonance Laboratory-BMRL, Andalusian Public Foundation Progress and Health-FPS, Seville, Spain
- Instituto de Investigación Biomédica de Málaga y Plataforma en Nanomedicina (IBIMA Plataforma BIONAND), Universidad de Málaga, C/Severo Ochoa, 35, Malaga, 29590, Spain
| | - Jesús David Urbano-Gámez
- Biomedical Magnetic Resonance Laboratory-BMRL, Andalusian Public Foundation Progress and Health-FPS, Seville, Spain
- Instituto de Investigación Biomédica de Málaga y Plataforma en Nanomedicina (IBIMA Plataforma BIONAND), Universidad de Málaga, C/Severo Ochoa, 35, Malaga, 29590, Spain
| | - Ana M Beltrán
- Departamento de Ingeniería y Ciencia de los Materiales y del Transporte, Escuela Politécnica Superior, Universidad de Sevilla, Virgen de África 7, Sevilla, 41011, Spain
| | - Maria Luisa García-Martín
- Biomedical Magnetic Resonance Laboratory-BMRL, Andalusian Public Foundation Progress and Health-FPS, Seville, Spain
- Instituto de Investigación Biomédica de Málaga y Plataforma en Nanomedicina (IBIMA Plataforma BIONAND), Universidad de Málaga, C/Severo Ochoa, 35, Malaga, 29590, Spain
- Biomedical Research Networking Center in Bioengineering, Biomaterials &Nanomedicine (CIBER-BBN), Madrid, 28029, Spain
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4
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Ortiz-Rivero E, Orozco-Barrera S, Chatterjee H, González-Gómez CD, Caro C, García-Martín ML, González PH, Rica RA, Gámez F. Light-to-Heat Conversion of Optically Trapped Hot Brownian Particles. ACS Nano 2023; 17:24961-24971. [PMID: 38048481 PMCID: PMC10754033 DOI: 10.1021/acsnano.3c07086] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/30/2023] [Revised: 11/09/2023] [Accepted: 11/09/2023] [Indexed: 12/06/2023]
Abstract
Anisotropic hybrid nanostructures stand out as promising therapeutic agents in photothermal conversion-based treatments. Accordingly, understanding local heat generation mediated by light-to-heat conversion of absorbing multicomponent nanoparticles at the single-particle level has forthwith become a subject of broad and current interest. Nonetheless, evaluating reliable temperature profiles around a single trapped nanoparticle is challenging from all of the experimental, computational, and fundamental viewpoints. Committed to filling this gap, the heat generation of an anisotropic hybrid nanostructure is explored by means of two different experimental approaches from which the local temperature is measured in a direct or indirect way, all in the context of hot Brownian motion theory. The results were compared with analytical results supported by the numerical computation of the wavelength-dependent absorption efficiencies in the discrete dipole approximation for scattering calculations, which has been extended to inhomogeneous nanostructures. Overall, we provide a consistent and comprehensive view of the heat generation in optical traps of highly absorbing particles from the viewpoint of the hot Brownian motion theory.
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Affiliation(s)
- Elisa Ortiz-Rivero
- Nanomaterials
for Bioimaging Group, Departamento de Física de Materiales,
& Instituto de materiales Nicolás Cabrera & Institute
for Advanced Research in Chemical Sciences,, Universidad Autónoma de Madrid, Madrid 28049, Spain
| | - Sergio Orozco-Barrera
- Universidad
de Granada, Nanoparticles Trapping
Laboratory, Research Unit Modeling Nature (MNat) and Department of
Applied Physics, 18071 Granada, Spain
| | - Hirak Chatterjee
- Universidad
de Granada, Nanoparticles Trapping
Laboratory, Research Unit Modeling Nature (MNat) and Department of
Applied Physics, 18071 Granada, Spain
| | - Carlos D. González-Gómez
- Universidad
de Granada, Nanoparticles Trapping
Laboratory, Research Unit Modeling Nature (MNat) and Department of
Applied Physics, 18071 Granada, Spain
- Universidad
de Málaga, Department of Applied
Physics II, 29071 Málaga, Spain
| | - Carlos Caro
- Biomedical
Magnetic Resonance Laboratory-BMRL, Andalusian Public Foundation Progress
and Health-FPS, 41092 Sevilla, Spain
- Biomedical
Research Institute of Málaga and Nanomedicine Platform (IBIMA-BIONAND
Platform), University of Málaga, C/Severo Ochoa 35, 29590 Málaga, Spain
| | - María-Luisa García-Martín
- Biomedical
Magnetic Resonance Laboratory-BMRL, Andalusian Public Foundation Progress
and Health-FPS, 41092 Sevilla, Spain
- Biomedical
Research Institute of Málaga and Nanomedicine Platform (IBIMA-BIONAND
Platform), University of Málaga, C/Severo Ochoa 35, 29590 Málaga, Spain
- Biomedical
Research Networking Center in Bioengineering, Biomaterials & Nanomedicine
(CIBER-BBN), 28029 Madrid, Spain
| | - Patricia Haro González
- Nanomaterials
for Bioimaging Group, Departamento de Física de Materiales,
& Instituto de materiales Nicolás Cabrera & Institute
for Advanced Research in Chemical Sciences,, Universidad Autónoma de Madrid, Madrid 28049, Spain
| | - Raúl A. Rica
- Universidad
de Granada, Nanoparticles Trapping
Laboratory, Research Unit Modeling Nature (MNat) and Department of
Applied Physics, 18071 Granada, Spain
| | - Francisco Gámez
- Department
of Physical Chemistry, Universidad Complutense
de Madrid, 28040 Madrid, Spain
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5
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Paez-Muñoz JM, Gámez F, Fernández-Afonso Y, Gallardo R, Pernia Leal M, Gutiérrez L, de la Fuente JM, Caro C, García-Martín ML. Optimization of iron oxide nanoparticles for MRI-guided magnetic hyperthermia tumor therapy: reassessing the role of shape in their magnetocaloric effect. J Mater Chem B 2023; 11:11110-11120. [PMID: 37947078 DOI: 10.1039/d3tb01821k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2023]
Abstract
Superparamagnetic iron oxide nanoparticles have hogged the limelight in different fields of nanotechnology. Surprisingly, notwithstanding the prominent role played as agents in magnetic hyperthermia treatments, the effects of nanoparticle size and shape on the magnetic hyperthermia performance have not been entirely elucidated yet. Here, spherical or cubical magnetic nanoparticles synthesized by a thermal decomposition method with the same magnetic and hyperthermia properties are evaluated. Interestingly, spherical nanoparticles displayed significantly higher magnetic relaxivity than cubic nanoparticles; however, comparable differences were not observed in specific absorption rate (SAR), pointing out the need for additional research to better understand the connection between these two parameters. Additionally, the as-synthetized spherical nanoparticles showed negligible cytotoxicity and, therefore, were tested in vivo in tumor-bearing mice. Following intratumoral administration of these spherical nanoparticles and a single exposure to alternating magnetic fields (AMF) closely mimicking clinical conditions, a significant delay in tumor growth was observed. Although further in vivo experiments are warranted to optimize the magnetic hyperthermia conditions, our findings support the great potential of these nanoparticles as magnetic hyperthermia mediators for tumor therapy.
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Affiliation(s)
- José María Paez-Muñoz
- Biomedical Magnetic Resonance Laboratory-BMRL, Andalusian Public Foundation Progress and Health-FPS, Seville, Spain.
- Instituto de Investigación Biomédica de Málaga y Plataforma en Nanomedicina-IBIMA Plataforma BIONAND, C/ Severo Ochoa, 35, 29590 Málaga, Spain
| | - Francisco Gámez
- Departamento de Química Física, Facultad de Ciencias Químicas, Universidad Complutense de Madrid, 28040 Madrid, Spain
| | - Yilian Fernández-Afonso
- Instituto de Nanociencia y Materiales de Aragón (INMA), CSIC-Universidad de Zaragoza, 50009 Zaragoza, Spain
- Departamento de Química Analítica, Universidad de Zaragoza, C/ Pedro Cerbuna 12, 50009, Zaragoza, Spain
| | - Roberto Gallardo
- Instituto de Investigación Biomédica de Málaga y Plataforma en Nanomedicina-IBIMA Plataforma BIONAND, C/ Severo Ochoa, 35, 29590 Málaga, Spain
| | - Manuel Pernia Leal
- Departamento de Química Orgánica y Farmacéutica, Facultad de Farmacia, Universidad de Sevilla, C/ Profesor García González 2, 41012 Seville, Spain
| | - Lucía Gutiérrez
- Instituto de Nanociencia y Materiales de Aragón (INMA), CSIC-Universidad de Zaragoza, 50009 Zaragoza, Spain
- Departamento de Química Analítica, Universidad de Zaragoza, C/ Pedro Cerbuna 12, 50009, Zaragoza, Spain
- Biomedical Research Networking Center in Bioengineering, Biomaterials & Nanomedicine (CIBER-BBN), Spain
| | - Jesús M de la Fuente
- Instituto de Nanociencia y Materiales de Aragón (INMA), CSIC-Universidad de Zaragoza, 50009 Zaragoza, Spain
- Biomedical Research Networking Center in Bioengineering, Biomaterials & Nanomedicine (CIBER-BBN), Spain
| | - Carlos Caro
- Biomedical Magnetic Resonance Laboratory-BMRL, Andalusian Public Foundation Progress and Health-FPS, Seville, Spain.
- Instituto de Investigación Biomédica de Málaga y Plataforma en Nanomedicina-IBIMA Plataforma BIONAND, C/ Severo Ochoa, 35, 29590 Málaga, Spain
| | - María Luisa García-Martín
- Biomedical Magnetic Resonance Laboratory-BMRL, Andalusian Public Foundation Progress and Health-FPS, Seville, Spain.
- Instituto de Investigación Biomédica de Málaga y Plataforma en Nanomedicina-IBIMA Plataforma BIONAND, C/ Severo Ochoa, 35, 29590 Málaga, Spain
- Biomedical Research Networking Center in Bioengineering, Biomaterials & Nanomedicine (CIBER-BBN), Spain
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6
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Ocaña MC, Bernal M, Yang C, Caro C, Domínguez A, Vu HS, Cárdenas C, García-Martín ML, DeBerardinis RJ, Quesada AR, Martínez-Poveda B, Medina MÁ. New insights in the targets of action of dimethyl fumarate in endothelial cells: effects on energetic metabolism and serine synthesis in vitro and in vivo. Commun Biol 2023; 6:1084. [PMID: 37880317 PMCID: PMC10600195 DOI: 10.1038/s42003-023-05443-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [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: 04/24/2022] [Accepted: 10/11/2023] [Indexed: 10/27/2023] Open
Abstract
Dimethyl fumarate is an ester from the Krebs cycle intermediate fumarate. This drug is approved and currently used for the treatment of psoriasis and multiple sclerosis, and its anti-angiogenic activity was reported some years ago. Due to the current clinical relevance of this compound and the recently manifested importance of endothelial cell metabolism on the angiogenic switch, we wanted to elucidate whether dimethyl fumarate has an effect on energetic metabolism of endothelial cells. Different experimental approximations were performed in endothelial cells, including proteomics, isotope tracing and metabolomics experimental approaches, in this work we studied the possible role of dimethyl fumarate in endothelial cell energetic metabolism. We demonstrate for the first time that dimethyl fumarate promotes glycolysis and diminishes cell respiration in endothelial cells, which could be a consequence of a down-regulation of serine and glycine synthesis through inhibition of PHGDH activity in these cells. Dimethyl fumarate alters the energetic metabolism of endothelial cells in vitro and in vivo through an unknown mechanism, which could be the cause or the consequence of its pharmacological activity. This new discovery on the targets of this compound could open a new field of study regarding the mechanism of action of dimethyl fumarate.
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Affiliation(s)
- Mª Carmen Ocaña
- Universidad de Málaga, Andalucía Tech, Departamento de Biología Molecular y Bioquímica, Facultad de Ciencias, E-29071, Málaga, Spain
- IBIMA Plataforma BIONAND (Biomedical Research Institute of Málaga and nano medicine Platform), E-29590, Málaga, Spain
| | - Manuel Bernal
- Universidad de Málaga, Andalucía Tech, Departamento de Biología Molecular y Bioquímica, Facultad de Ciencias, E-29071, Málaga, Spain
- IBIMA Plataforma BIONAND (Biomedical Research Institute of Málaga and nano medicine Platform), E-29590, Málaga, Spain
| | - Chendong Yang
- Children's Medical Center Research Institute, The University of Texas Southwestern Medical Center, Dallas, TX, 75390, USA
| | - Carlos Caro
- IBIMA Plataforma BIONAND (Biomedical Research Institute of Málaga and nano medicine Platform), E-29590, Málaga, Spain
- Biomedical Magnetic Resonance Laboratory-BMRL, Andalusian Public Foundation Progress and Health-FPS, Seville, Spain
| | - Alejandro Domínguez
- IBIMA Plataforma BIONAND (Biomedical Research Institute of Málaga and nano medicine Platform), E-29590, Málaga, Spain
| | - Hieu S Vu
- Children's Medical Center Research Institute, The University of Texas Southwestern Medical Center, Dallas, TX, 75390, USA
| | - Casimiro Cárdenas
- Universidad de Málaga, Andalucía Tech, Departamento de Biología Molecular y Bioquímica, Facultad de Ciencias, E-29071, Málaga, Spain
- Research Support Central Services (SCAI) of the University of Málaga, Málaga, Spain
| | - María Luisa García-Martín
- IBIMA Plataforma BIONAND (Biomedical Research Institute of Málaga and nano medicine Platform), E-29590, Málaga, Spain
- Biomedical Magnetic Resonance Laboratory-BMRL, Andalusian Public Foundation Progress and Health-FPS, Seville, Spain
- Biomedical Research Networking Center in Bioengineering, Biomaterials & Nanomedicine (CIBER-BBN), 28029, Madrid, Spain
| | - Ralph J DeBerardinis
- Children's Medical Center Research Institute, The University of Texas Southwestern Medical Center, Dallas, TX, 75390, USA
- Department of Pediatrics, The University of Texas Southwestern Medical Center, Dallas, TX, 75390, USA
- Eugene McDermott Center for Human Growth and Development, The University of Texas Southwestern Medical Center, Dallas, TX, 75390, USA
- Howard Hughes Medical Institute, The University of Texas Southwestern Medical Center, Dallas, TX, 75390, USA
| | - Ana R Quesada
- Universidad de Málaga, Andalucía Tech, Departamento de Biología Molecular y Bioquímica, Facultad de Ciencias, E-29071, Málaga, Spain
- IBIMA Plataforma BIONAND (Biomedical Research Institute of Málaga and nano medicine Platform), E-29590, Málaga, Spain
- CIBER de Enfermedades Raras (CIBERER), Madrid, Spain
| | - Beatriz Martínez-Poveda
- Universidad de Málaga, Andalucía Tech, Departamento de Biología Molecular y Bioquímica, Facultad de Ciencias, E-29071, Málaga, Spain.
- IBIMA Plataforma BIONAND (Biomedical Research Institute of Málaga and nano medicine Platform), E-29590, Málaga, Spain.
- CIBER de Enfermedades Cardiovasculares (CIBERCV), Madrid, Spain.
| | - Miguel Ángel Medina
- Universidad de Málaga, Andalucía Tech, Departamento de Biología Molecular y Bioquímica, Facultad de Ciencias, E-29071, Málaga, Spain.
- IBIMA Plataforma BIONAND (Biomedical Research Institute of Málaga and nano medicine Platform), E-29590, Málaga, Spain.
- CIBER de Enfermedades Raras (CIBERER), Madrid, Spain.
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7
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Fernandez-Rodriguez MA, Orozco-Barrera S, Sun W, Gámez F, Caro C, García-Martín ML, Rica RA. Hot Brownian Motion of Thermoresponsive Microgels in Optical Tweezers Shows Discontinuous Volume Phase Transition and Bistability. Small 2023; 19:e2301653. [PMID: 37158287 DOI: 10.1002/smll.202301653] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/24/2023] [Revised: 04/03/2023] [Indexed: 05/10/2023]
Abstract
Microgels are soft microparticles that often exhibit thermoresponsiveness and feature a transformation at a critical temperature, referred to as the volume phase transition temperature. Whether this transformation occurs as a smooth or as a discontinuous one is still a matter of debate. This question can be addressed by studying individual microgels trapped in optical tweezers. For this aim, composite particles are obtained by decorating Poly-N-isopropylacrylamide (pNIPAM) microgels with iron oxide nanocubes. These composites become self-heating when illuminated by the infrared trapping laser, performing hot Brownian motion within the trap. Above a certain laser power, a single decorated microgel features a volume phase transition that is discontinuous, while the usual continuous sigmoidal-like dependence is recovered after averaging over different microgels. The collective sigmoidal behavior enables the application of a power-to-temperature calibration and provides the effective drag coefficient of the self-heating microgels, thus establishing these composite particles as potential micro-thermometers and micro-heaters. Moreover, the self-heating microgels also exhibit an unexpected and intriguing bistability behavior above the critical temperature, probably due to partial collapses of the microgel. These results set the stage for further studies and the development of applications based on the hot Brownian motion of soft particles.
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Affiliation(s)
- Miguel Angel Fernandez-Rodriguez
- Universidad de Granada, Nanoparticles Trapping Laboratory, Department of Applied Physics, Faculty of Sciences, Campus de Fuentenueva s/n, 18071, Granada, Spain
- Laboratory of Surface and Interface Physics, Department of Applied Physics, Faculty of Sciences, Universidad de Granada, Campus de Fuentenueva s/n, 18071, Granada, Spain
- Research Unit Modeling Nature (MNat), Universidad de Granada, Granada, Spain
| | - Sergio Orozco-Barrera
- Universidad de Granada, Nanoparticles Trapping Laboratory, Department of Applied Physics, Faculty of Sciences, Campus de Fuentenueva s/n, 18071, Granada, Spain
| | - Wei Sun
- Universidad de Granada, Nanoparticles Trapping Laboratory, Department of Applied Physics, Faculty of Sciences, Campus de Fuentenueva s/n, 18071, Granada, Spain
- Department of Physics, Yanshan University, Qinhuangdao, 066004, China
| | - Francisco Gámez
- Universidad de Granada, Nanoparticles Trapping Laboratory, Department of Applied Physics, Faculty of Sciences, Campus de Fuentenueva s/n, 18071, Granada, Spain
| | - Carlos Caro
- Department of Physical Chemistry, Faculty of Chemical Sciences, Complutense University of Madrid, 28040, Madrid, Spain
| | - María L García-Martín
- Department of Physical Chemistry, Faculty of Chemical Sciences, Complutense University of Madrid, 28040, Madrid, Spain
- Instituto de Investigación Bioméadica de Málaga y Plataforma en Nanomedicina (IBIMA Plataforma BIONAND), C/ Severo Ochoa, 35, 29590, Málaga, Spain
- Biomedical Research Networking Center in Bioengineering, Biomaterials & Nanomedicine (CIBER-BBN), 28029, Madrid, Spain
| | - Raúl Alberto Rica
- Universidad de Granada, Nanoparticles Trapping Laboratory, Department of Applied Physics, Faculty of Sciences, Campus de Fuentenueva s/n, 18071, Granada, Spain
- Research Unit Modeling Nature (MNat), Universidad de Granada, Granada, Spain
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8
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García-García G, Caro C, Fernández-Álvarez F, García-Martín ML, Arias JL. Multi-stimuli-responsive chitosan-functionalized magnetite/poly(ε-caprolactone) nanoparticles as theranostic platforms for combined tumor magnetic resonance imaging and chemotherapy. Nanomedicine 2023; 52:102695. [PMID: 37394106 DOI: 10.1016/j.nano.2023.102695] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/21/2023] [Revised: 06/02/2023] [Accepted: 06/27/2023] [Indexed: 07/04/2023]
Abstract
Chitosan-functionalized magnetite/poly(ε-caprolactone) nanoparticles were formulated by interfacial polymer disposition plus coacervation, and loaded with gemcitabine. That (core/shell)/shell nanostructure was confirmed by electron microscopy, elemental analysis, electrophoretic, and Fourier transform infrared characterizations. A short-term stability study proved the protection against particle aggregation provided by the chitosan shell. Superparamagnetic properties of the nanoparticles were characterized in vitro, while the definition of the longitudinal and transverse relaxivities was an initial indication of their capacity as T2 contrast agents. Safety of the particles was demonstrated in vitro on HFF-1 human fibroblasts, and ex vivo on SCID mice. The nanoparticles demonstrated in vitro pH- and heat-responsive gemcitabine release capabilities. In vivo magnetic resonance imaging studies and Prussian blue visualization of iron deposits in tissue samples defined the improvement in nanoparticle targeting into the tumor when using a magnetic field. This tri-stimuli (magnetite/poly(ε-caprolactone))/chitosan nanostructure could find theranostic applications (biomedical imaging & chemotherapy) against tumors.
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Affiliation(s)
- Gracia García-García
- Faculty of Experimental Sciences, Universidad Francisco de Vitoria, Ctra. Pozuelo-Majadahonda Km 1,800, 28223 Pozuelo de Alarcón, Madrid, Spain
| | - Carlos Caro
- Andalusian Centre for Nanomedicine and Biotechnology (BIONAND), Junta de Andalucía-Universidad de Málaga, C/ Severo Ochoa, 35, 29590 Málaga, Spain
| | - Fátima Fernández-Álvarez
- Department of Pharmacy and Pharmaceutical Technology, Faculty of Pharmacy, University of Granada, 18071 Granada, Spain
| | - María Luisa García-Martín
- Andalusian Centre for Nanomedicine and Biotechnology (BIONAND), Junta de Andalucía-Universidad de Málaga, C/ Severo Ochoa, 35, 29590 Málaga, Spain; Biomedical Research Networking Center in Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN), Málaga, Spain
| | - José L Arias
- Department of Pharmacy and Pharmaceutical Technology, Faculty of Pharmacy, University of Granada, 18071 Granada, Spain; Institute of Biopathology and Regenerative Medicine (IBIMER), Center of Biomedical Research (CIBM), University of Granada, Av. del Conocimiento, 18016 Granada, Spain; Biosanitary Research Institute of Granada (ibs.GRANADA), University of Granada, Av. de Madrid, 15, 18012 Granada, Spain.
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9
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Gómez-González E, González-Mancebo D, Núñez NO, Caro C, García-Martín ML, Becerro AI, Ocaña M. Lanthanide vanadate-based trimodal probes for near-infrared luminescent bioimaging, high-field magnetic resonance imaging, and X-ray computed tomography. J Colloid Interface Sci 2023; 646:721-731. [PMID: 37229990 DOI: 10.1016/j.jcis.2023.05.078] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [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: 12/12/2022] [Revised: 04/28/2023] [Accepted: 05/13/2023] [Indexed: 05/27/2023]
Abstract
We have developed a trimodal bioimaging probe for near-infrared luminescent imaging, high-field magnetic resonance imaging, and X-ray computed tomography using Dy3+ as the paramagnetic component and Nd3+ as the luminescent cation, both of them incorporated in a vanadate matrix. Among different essayed architectures (single phase and core-shell nanoparticles) the one showing the best luminescent properties is that consisting of uniform DyVO4 nanoparticles coated with a first uniform layer of LaVO4 and a second layer of Nd3+-doped LaVO4. The magnetic relaxivity (r2) at high field (9.4 T) of these nanoparticles was among the highest values ever reported for this kind of probes and their X-ray attenuation properties, due to the presence of lanthanide cations, were also better than those of a commercial contrast agent (iohexol) commonly used for X-ray computed tomography. In addition, they were chemically stable in a physiological medium in which they could be easily dispersed owing to their one-pot functionalization with polyacrylic acid, and, finally, they were non-toxic for human fibroblast cells. Such a probe is, therefore, an excellent multimodal contrast agent for near-infrared luminescent imaging, high-field magnetic resonance imaging, and X-ray computed tomography.
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Affiliation(s)
- Elisabet Gómez-González
- Instituto de Ciencia de Materiales de Sevilla (CSIC-US), c/Américo Vespucio, 49, 41092 Sevilla, Spain
| | - Daniel González-Mancebo
- Instituto de Ciencia de Materiales de Sevilla (CSIC-US), c/Américo Vespucio, 49, 41092 Sevilla, Spain
| | - Nuria O Núñez
- Instituto de Ciencia de Materiales de Sevilla (CSIC-US), c/Américo Vespucio, 49, 41092 Sevilla, Spain
| | - Carlos Caro
- Instituto de Investigación Biomédica de Málaga y Plataforma en Nanomedicina, (IBIMA-Plataforma BIONAND) and CIBER-BBN, Málaga 29590, Spain
| | - Maria L García-Martín
- Instituto de Investigación Biomédica de Málaga y Plataforma en Nanomedicina, (IBIMA-Plataforma BIONAND) and CIBER-BBN, Málaga 29590, Spain
| | - Ana I Becerro
- Instituto de Ciencia de Materiales de Sevilla (CSIC-US), c/Américo Vespucio, 49, 41092 Sevilla, Spain
| | - Manuel Ocaña
- Instituto de Ciencia de Materiales de Sevilla (CSIC-US), c/Américo Vespucio, 49, 41092 Sevilla, Spain.
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10
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Montes F, Blanco M, Useche AF, Sanchez-Franco S, Caro C, Tong L, Li J, Zhou H, Murray JM, Sarmiento OL, Kee F, Hunter RF. Exploring the mechanistic pathways of how social network influences social norms in adolescent smoking prevention interventions. Sci Rep 2023; 13:3017. [PMID: 36810585 PMCID: PMC9944961 DOI: 10.1038/s41598-023-28161-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2022] [Accepted: 01/13/2023] [Indexed: 02/24/2023] Open
Abstract
We know little about how smoking prevention interventions might leverage social network structures to enhance protective social norms. In this study we combined statistical and network science methods to explore how social networks influence social norms related to adolescent smoking in school-specific settings in Northern Ireland and Colombia. Pupils (12-15 years old) participated in two smoking prevention interventions in both countries (n = 1344). A Latent Transition Analysis identified three groups characterized by descriptive and injunctive norms towards smoking. We employed a Separable Temporal Random Graph Model to analyze homophily in social norms and conducted a descriptive analysis of the changes in the students' and their friends' social norms over time to account for social influence. The results showed that students were more likely to be friends with others who had social norms against smoking. However, students with social norms favorable towards smoking had more friends with similar views than the students with perceived norms against smoking, underlining the importance of network thresholds. Our results support the notation that the ASSIST intervention takes advantage of friendship networks to leverage greater change in the students' smoking social norms than the Dead Cool intervention, reiterating that social norms are subject to social influence.
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Affiliation(s)
- Felipe Montes
- Department of Industrial Engineering, Social and Health Complexity Center, Universidad de Los Andes, Bogotá, Colombia.
| | - Martha Blanco
- grid.7247.60000000419370714Department of Industrial Engineering, Social and Health Complexity Center, Universidad de Los Andes, Bogotá, Colombia
| | - Andres F. Useche
- grid.7247.60000000419370714Department of Industrial Engineering, Social and Health Complexity Center, Universidad de Los Andes, Bogotá, Colombia
| | - Sharon Sanchez-Franco
- grid.7247.60000000419370714Department of Public Health, School of Medicine, Universidad de Los Andes, Bogotá, Colombia
| | - Carlos Caro
- grid.7247.60000000419370714Department of Industrial Engineering, Social and Health Complexity Center, Universidad de Los Andes, Bogotá, Colombia
| | - Lei Tong
- grid.9918.90000 0004 1936 8411School of Informatics, University of Leicester, Leicester, UK
| | - Jie Li
- grid.64938.300000 0000 9558 9911College of Electronic and Information Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing, China
| | - Huiyu Zhou
- grid.9918.90000 0004 1936 8411School of Informatics, University of Leicester, Leicester, UK
| | - Jennifer M. Murray
- grid.416232.00000 0004 0399 1866Centre for Public Health, Institute of Clinical Sciences, Block B, Queen’s University Belfast, Royal Victoria Hospital, Grosvenor Road, Belfast, BT12 6BA, 02890978955 UK
| | - Olga L. Sarmiento
- grid.7247.60000000419370714Department of Public Health, School of Medicine, Universidad de Los Andes, Bogotá, Colombia
| | - Frank Kee
- grid.4777.30000 0004 0374 7521Centre for Public Health, Institute of Health Sciences, School of Medicine, Dentistry and Biomedical Sciences, Queen’s University Belfast, Belfast, BT12 6BJ UK
| | - Ruth F. Hunter
- grid.4777.30000 0004 0374 7521Centre for Public Health, Institute of Health Sciences, School of Medicine, Dentistry and Biomedical Sciences, Queen’s University Belfast, Belfast, BT12 6BJ UK
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11
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Carrillo P, Bernal M, Téllez-Quijorna C, Marrero AD, Vidal I, Castilla L, Caro C, Domínguez A, García-Martín ML, Quesada AR, Medina MA, Martínez-Poveda B. The synthetic molecule stauprimide impairs cell growth and migration in triple-negative breast cancer. Biomed Pharmacother 2023; 158:114070. [PMID: 36526536 DOI: 10.1016/j.biopha.2022.114070] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2022] [Revised: 11/30/2022] [Accepted: 12/02/2022] [Indexed: 12/15/2022] Open
Abstract
Stauprimide, a semi-synthetic derivative of staurosporine, is known mainly for its potent differentiation-enhancing properties in embryonic stem cells. Here, we studied the effects of stauprimide in cell growth and migration of triple-negative breast cancer cells in vitro, evaluating its potential antitumoral activity in an orthotopic mouse model of breast cancer in vivo. Our results from survival curves, EdU incorporation, cell cycle analysis and annexin-V detection in MDA-MB-231 cells indicated that stauprimide inhibited cell proliferation, arresting cell cycle in G2/M without induction of apoptosis. A decrease in the migratory capability of MDA-MB-231 was also assessed in response to stauprimide. In this work we pointed to a mechanism of action of stauprimide involving the modulation of ERK1/2, Akt and p38 MAPK signalling pathways, and the downregulation of MYC in MDA-MB-231 cells. In addition, orthotopic MDA-MB-231 xenograft and 4T1 syngeneic models suggested an effect of stauprimide in vivo, increasing the necrotic core of tumors and reducing metastasis in lung and liver of mice. Together, our results point to the promising role of stauprimide as a putative therapeutic agent in triple-negative breast cancer.
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Affiliation(s)
- P Carrillo
- Departamento de Biología Molecular y Bioquímica, Facultad de Ciencias, Universidad de Málaga, Andalucía Tech, E-29071 Málaga, Spain; Instituto de Investigación Biomédica de Málaga y Plataforma en Nanomedicina (IBIMA Plataforma BIONAND), C/Severo Ochoa, 35, 29590, Málaga, Spain
| | - M Bernal
- Departamento de Biología Molecular y Bioquímica, Facultad de Ciencias, Universidad de Málaga, Andalucía Tech, E-29071 Málaga, Spain; Instituto de Investigación Biomédica de Málaga y Plataforma en Nanomedicina (IBIMA Plataforma BIONAND), C/Severo Ochoa, 35, 29590, Málaga, Spain
| | - C Téllez-Quijorna
- Departamento de Biología Molecular y Bioquímica, Facultad de Ciencias, Universidad de Málaga, Andalucía Tech, E-29071 Málaga, Spain
| | - A D Marrero
- Departamento de Biología Molecular y Bioquímica, Facultad de Ciencias, Universidad de Málaga, Andalucía Tech, E-29071 Málaga, Spain; Instituto de Investigación Biomédica de Málaga y Plataforma en Nanomedicina (IBIMA Plataforma BIONAND), C/Severo Ochoa, 35, 29590, Málaga, Spain
| | - I Vidal
- Departamento de Biología Molecular y Bioquímica, Facultad de Ciencias, Universidad de Málaga, Andalucía Tech, E-29071 Málaga, Spain; Instituto de Investigación Biomédica de Málaga y Plataforma en Nanomedicina (IBIMA Plataforma BIONAND), C/Severo Ochoa, 35, 29590, Málaga, Spain
| | - L Castilla
- Departamento de Biología Molecular y Bioquímica, Facultad de Ciencias, Universidad de Málaga, Andalucía Tech, E-29071 Málaga, Spain; Instituto de Investigación Biomédica de Málaga y Plataforma en Nanomedicina (IBIMA Plataforma BIONAND), C/Severo Ochoa, 35, 29590, Málaga, Spain
| | - C Caro
- Instituto de Investigación Biomédica de Málaga y Plataforma en Nanomedicina (IBIMA Plataforma BIONAND), C/Severo Ochoa, 35, 29590, Málaga, Spain
| | - A Domínguez
- Instituto de Investigación Biomédica de Málaga y Plataforma en Nanomedicina (IBIMA Plataforma BIONAND), C/Severo Ochoa, 35, 29590, Málaga, Spain
| | - M L García-Martín
- Instituto de Investigación Biomédica de Málaga y Plataforma en Nanomedicina (IBIMA Plataforma BIONAND), C/Severo Ochoa, 35, 29590, Málaga, Spain; Biomedical Research Networking Center in Bioengineering, Biomaterials & Nanomedicine (CIBER-BBN), Spain
| | - A R Quesada
- Departamento de Biología Molecular y Bioquímica, Facultad de Ciencias, Universidad de Málaga, Andalucía Tech, E-29071 Málaga, Spain; Instituto de Investigación Biomédica de Málaga y Plataforma en Nanomedicina (IBIMA Plataforma BIONAND), C/Severo Ochoa, 35, 29590, Málaga, Spain; CIBER de Enfermedades Raras (CIBERER, Instituto de Salud Carlos III), Spain
| | - M A Medina
- Departamento de Biología Molecular y Bioquímica, Facultad de Ciencias, Universidad de Málaga, Andalucía Tech, E-29071 Málaga, Spain; Instituto de Investigación Biomédica de Málaga y Plataforma en Nanomedicina (IBIMA Plataforma BIONAND), C/Severo Ochoa, 35, 29590, Málaga, Spain; CIBER de Enfermedades Raras (CIBERER, Instituto de Salud Carlos III), Spain
| | - B Martínez-Poveda
- Departamento de Biología Molecular y Bioquímica, Facultad de Ciencias, Universidad de Málaga, Andalucía Tech, E-29071 Málaga, Spain; Instituto de Investigación Biomédica de Málaga y Plataforma en Nanomedicina (IBIMA Plataforma BIONAND), C/Severo Ochoa, 35, 29590, Málaga, Spain; CIBER de Enfermedades Cardiovasculares (CIBERCV, Instituto de Salud Carlos III, Madrid), Spain.
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12
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Caro C, Pourmadadi M, Eshaghi MM, Rahmani E, Shojaei S, Paiva-Santos AC, Rahdar A, Behzadmehr R, García-Martín ML, Díez-Pascual AM. Nanomaterials loaded with Quercetin as an advanced tool for cancer treatment. J Drug Deliv Sci Technol 2022. [DOI: 10.1016/j.jddst.2022.103938] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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13
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Borrego LG, Recio R, Moreno N, Chelouan A, Álvarez E, Sánchez-Coronilla A, Caro C, Pearson JR, García-Martín ML, Khiar N, Fernández I. Enantioselective synthesis of 4-amino-3,4-dihydrocoumarins and their non-cyclic hydroxyester precursors: Biological evaluation for the treatment of glioblastoma multiforme. Eur J Med Chem 2022; 243:114730. [DOI: 10.1016/j.ejmech.2022.114730] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2022] [Revised: 08/24/2022] [Accepted: 08/26/2022] [Indexed: 11/04/2022]
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14
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Gómez-González E, Caro C, García-Martín ML, Becerro AI, Ocaña M. Outstanding MRI contrast with dysprosium phosphate nanoparticles of tuneable size. Nanoscale 2022; 14:11461-11470. [PMID: 35904370 DOI: 10.1039/d2nr02630a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
The use of high-field magnets for magnetic resonance imaging (MRI) is expected to experience the fastest growth rate during the present decade. Although several CAs for MRI scanners using high magnetic fields have been reported, they are mostly based on fluoride matrices, which are known for their low chemical stability in aqueous suspensions. Chemically stable MRI CAs for high-field magnets are therefore needed to enable the advances in MRI technique. Herein, we synthesized uniform DyPO4 nanoparticles (NPs) with tuneable sizes between 23 and 57 nm using homogeneous precipitation in butanol. The NPs were successfully functionalized with polyacrylic acid (PAA) and showed good colloidal stability in aqueous suspensions. Chemical stability was also assessed in PBS, showing negligible solubility. The effect of particle size on the transversal relaxivity value (r2) was further explored at 9.4 T, finding a clear increase in r2 with particle size. The r2 value found for the largest NPs was 516 mM-1 s-1, which is, to the best of our knowledge, the highest r2 value ever reported at 9.4 T for any Dy-based nanometric particles in the literature. Finally, the latter NPs were submitted to biosafety studies after polyethylene glycol (PEG) functionalization. Cell morphology, induction of necrotic/late apoptotic cells, and mitochondrial activity were thoroughly analyzed. The results clearly indicated negligible toxicity effects under the assayed conditions. Short- and long-term in vivo pharmacokinetics of the intravenously injected NPs were assessed by dynamic T2-weighted MRI and quantitative T2 mapping, revealing faster liver than spleen uptake, while no accumulation was observed in the kidneys. Finally, no histopathological changes were observed in any of the studied organs, including the liver, kidney, spleen, and lung, which provide further evidence of the biocompatibility of DyPO4 NPs and, therefore, their suitability as bioimaging probes.
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Affiliation(s)
- Elisabet Gómez-González
- Instituto de Ciencia de Materiales de Sevilla (ICMS) CSIC-Universidad de Sevilla, c/Américo Vespucio, 49, 41092 Seville, Spain.
| | - Carlos Caro
- Instituto de Investigación Biomédica de Málaga - Plataforma Bionand (IBIMA-Plataforma BIONAND) and CIBER-BBN, Málaga 29590, Spain
| | - María L García-Martín
- Instituto de Investigación Biomédica de Málaga - Plataforma Bionand (IBIMA-Plataforma BIONAND) and CIBER-BBN, Málaga 29590, Spain
| | - Ana Isabel Becerro
- Instituto de Ciencia de Materiales de Sevilla (ICMS) CSIC-Universidad de Sevilla, c/Américo Vespucio, 49, 41092 Seville, Spain.
| | - Manuel Ocaña
- Instituto de Ciencia de Materiales de Sevilla (ICMS) CSIC-Universidad de Sevilla, c/Américo Vespucio, 49, 41092 Seville, Spain.
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15
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Gómez-González E, Núñez NO, Caro C, Garcia-Martin ML, Ocaña M. Carboxylate functionalized NaDy(MoO4)2 nanoparticles with tunable size and shape as high magnetic field MRI contrast agents. J Colloid Interface Sci 2022; 629:310-321. [DOI: 10.1016/j.jcis.2022.08.130] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2022] [Revised: 08/18/2022] [Accepted: 08/19/2022] [Indexed: 11/25/2022]
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16
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Christou E, Pearson JR, Beltrán AM, Fernández-Afonso Y, Gutiérrez L, de la Fuente JM, Gámez F, García-Martín ML, Caro C. Iron–Gold Nanoflowers: A Promising Tool for Multimodal Imaging and Hyperthermia Therapy. Pharmaceutics 2022; 14:pharmaceutics14030636. [PMID: 35336012 PMCID: PMC8955043 DOI: 10.3390/pharmaceutics14030636] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2022] [Revised: 02/26/2022] [Accepted: 03/11/2022] [Indexed: 12/17/2022] Open
Abstract
The development of nanoplatforms prepared to perform both multimodal imaging and combined therapies in a single entity is a fast-growing field. These systems are able to improve diagnostic accuracy and therapy success. Multicomponent Nanoparticles (MCNPs), composed of iron oxide and gold, offer new opportunities for Magnetic Resonance Imaging (MRI) and Computed Tomography (CT) diagnosis, as well as combined therapies based on Magnetic Hyperthermia (MH) and Photothermal Therapy (PT). In this work, we describe a new seed-assisted method for the synthesis of Au@Fe Nanoparticles (NPs) with a flower-like structure. For biomedical purposes, Au@Fe NPs were functionalized with a PEGylated ligand, leading to high colloidal stability. Moreover, the as-obtained Au@Fe-PEG NPs exhibited excellent features as both MRI and CT Contrast Agents (CAs), with high r2 relaxivity (60.5 mM−1⋅s−1) and X-ray attenuation properties (8.8 HU mM−1⋅HU). In addition, these nanoflowers presented considerable energy-to-heat conversion under both Alternating Magnetic Fields (AMFs) (∆T ≈ 2.5 °C) and Near-Infrared (NIR) light (∆T ≈ 17 °C). Finally, Au@Fe-PEG NPs exhibited very low cytotoxicity, confirming their potential for theranostics applications.
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Affiliation(s)
- Evangelia Christou
- BIONAND—Centro Andaluz de Nanomedicina y Biotecnología (Junta de Andalucía-Universidad de Málaga), C/Severo Ochoa, 35, 29590 Málaga, Spain; (E.C.); (J.R.P.)
| | - John R. Pearson
- BIONAND—Centro Andaluz de Nanomedicina y Biotecnología (Junta de Andalucía-Universidad de Málaga), C/Severo Ochoa, 35, 29590 Málaga, Spain; (E.C.); (J.R.P.)
| | - Ana M. Beltrán
- Departamento de Ingeniería y Ciencia de los Materiales y del Transporte, Escuela Politécnica Superior, Universidad de Sevilla, Virgen de Á frica 7, 41011 Sevilla, Spain;
| | - Yilian Fernández-Afonso
- Instituto de Nanociencia y Materiales de Aragón (INMA), CSIC-Universidad de Zaragoza, 50009 Zaragoza, Spain; (Y.F.-A.); (L.G.); (J.M.d.l.F.)
| | - Lucía Gutiérrez
- Instituto de Nanociencia y Materiales de Aragón (INMA), CSIC-Universidad de Zaragoza, 50009 Zaragoza, Spain; (Y.F.-A.); (L.G.); (J.M.d.l.F.)
- Biomedical Research Networking Center in Bioengineering, Biomaterials & Nanomedicine (CIBER-BBN), 28029 Madrid, Spain
| | - Jesús M. de la Fuente
- Instituto de Nanociencia y Materiales de Aragón (INMA), CSIC-Universidad de Zaragoza, 50009 Zaragoza, Spain; (Y.F.-A.); (L.G.); (J.M.d.l.F.)
- Biomedical Research Networking Center in Bioengineering, Biomaterials & Nanomedicine (CIBER-BBN), 28029 Madrid, Spain
| | - Francisco Gámez
- Departamento de Química Física, Facultad de Ciencias Químicas, Universidad Complutense de Madrid, 28040 Madrid, Spain;
| | - María L. García-Martín
- BIONAND—Centro Andaluz de Nanomedicina y Biotecnología (Junta de Andalucía-Universidad de Málaga), C/Severo Ochoa, 35, 29590 Málaga, Spain; (E.C.); (J.R.P.)
- Biomedical Research Networking Center in Bioengineering, Biomaterials & Nanomedicine (CIBER-BBN), 28029 Madrid, Spain
- Correspondence: (M.L.G.-M.); (C.C.)
| | - Carlos Caro
- BIONAND—Centro Andaluz de Nanomedicina y Biotecnología (Junta de Andalucía-Universidad de Málaga), C/Severo Ochoa, 35, 29590 Málaga, Spain; (E.C.); (J.R.P.)
- Correspondence: (M.L.G.-M.); (C.C.)
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17
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Peinado MÁ, Ovelleiro D, del Moral ML, Hernández R, Martínez-Lara E, Siles E, Pedrajas JR, García-Martín ML, Caro C, Peralta S, Morales ME, Ruiz MA, Blanco S. Biological Implications of a Stroke Therapy Based in Neuroglobin Hyaluronate Nanoparticles. Neuroprotective Role and Molecular Bases. Int J Mol Sci 2021; 23:247. [PMID: 35008673 PMCID: PMC8745106 DOI: 10.3390/ijms23010247] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2021] [Revised: 12/23/2021] [Accepted: 12/23/2021] [Indexed: 12/11/2022] Open
Abstract
Exogenous neuroprotective protein neuroglobin (Ngb) cannot cross the blood-brain barrier. To overcome this difficulty, we synthesized hyaluronate nanoparticles (NPs), able to deliver Ngb into the brain in an animal model of stroke (MCAO). These NPs effectively reached neurons, and were microscopically identified after 24 h of reperfusion. Compared to MCAO non-treated animals, those treated with Ngb-NPs showed survival rates up to 50% higher, and better neurological scores. Tissue damage improved with the treatment, but no changes in the infarct volume or in the oxidative/nitrosative values were detected. A proteomics approach (p-value < 0.02; fold change = 0.05) in the infarcted areas showed a total of 219 proteins that significantly changed their expression after stroke and treatment with Ngb-NPs. Of special interest, are proteins such as FBXO7 and NTRK2, which were downexpressed in stroke, but overexpressed after treatment with Ngb-NPs; and ATX2L, which was overexpressed only under the effect of Ngb. Interestingly, the proteins affected by the treatment with Ngb were involved in mitochondrial function and cell death, endocytosis, protein metabolism, cytoskeletal remodeling, or synaptic function, and in regenerative processes, such as dendritogenesis, neuritogenesis, or sinaptogenesis. Consequently, our pharmaceutical preparation may open new therapeutic scopes for stroke and possibly for other neurodegenerative pathologies.
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Affiliation(s)
- María Ángeles Peinado
- Department of Experimental Biology, Campus de Las Lagunillas s/n, University of Jaén, Building B3, 23071 Jaen, Spain; (D.O.); (M.L.d.M.); (R.H.); (E.M.-L.); (E.S.); (J.R.P.)
| | - David Ovelleiro
- Department of Experimental Biology, Campus de Las Lagunillas s/n, University of Jaén, Building B3, 23071 Jaen, Spain; (D.O.); (M.L.d.M.); (R.H.); (E.M.-L.); (E.S.); (J.R.P.)
| | - María Luisa del Moral
- Department of Experimental Biology, Campus de Las Lagunillas s/n, University of Jaén, Building B3, 23071 Jaen, Spain; (D.O.); (M.L.d.M.); (R.H.); (E.M.-L.); (E.S.); (J.R.P.)
| | - Raquel Hernández
- Department of Experimental Biology, Campus de Las Lagunillas s/n, University of Jaén, Building B3, 23071 Jaen, Spain; (D.O.); (M.L.d.M.); (R.H.); (E.M.-L.); (E.S.); (J.R.P.)
| | - Esther Martínez-Lara
- Department of Experimental Biology, Campus de Las Lagunillas s/n, University of Jaén, Building B3, 23071 Jaen, Spain; (D.O.); (M.L.d.M.); (R.H.); (E.M.-L.); (E.S.); (J.R.P.)
| | - Eva Siles
- Department of Experimental Biology, Campus de Las Lagunillas s/n, University of Jaén, Building B3, 23071 Jaen, Spain; (D.O.); (M.L.d.M.); (R.H.); (E.M.-L.); (E.S.); (J.R.P.)
| | - José Rafael Pedrajas
- Department of Experimental Biology, Campus de Las Lagunillas s/n, University of Jaén, Building B3, 23071 Jaen, Spain; (D.O.); (M.L.d.M.); (R.H.); (E.M.-L.); (E.S.); (J.R.P.)
| | - María Luisa García-Martín
- BIONAND-Centro Andaluz de Nanomedicina y Biotecnología, Junta de Andalucía, Universidad de Málaga, Parque Tecnológico de Andalucía, 29590 Malaga, Spain; (M.L.G.-M.); (C.C.)
| | - Carlos Caro
- BIONAND-Centro Andaluz de Nanomedicina y Biotecnología, Junta de Andalucía, Universidad de Málaga, Parque Tecnológico de Andalucía, 29590 Malaga, Spain; (M.L.G.-M.); (C.C.)
| | - Sebastián Peralta
- Department of Pharmacy and Pharmaceutical Technology, Campus de Cartuja s/n, School of Pharmacy, University of Granada, 18071 Granada, Spain; (S.P.); (M.E.M.); (M.A.R.)
| | - María Encarnación Morales
- Department of Pharmacy and Pharmaceutical Technology, Campus de Cartuja s/n, School of Pharmacy, University of Granada, 18071 Granada, Spain; (S.P.); (M.E.M.); (M.A.R.)
| | - María Adolfina Ruiz
- Department of Pharmacy and Pharmaceutical Technology, Campus de Cartuja s/n, School of Pharmacy, University of Granada, 18071 Granada, Spain; (S.P.); (M.E.M.); (M.A.R.)
| | - Santos Blanco
- Department of Experimental Biology, Campus de Las Lagunillas s/n, University of Jaén, Building B3, 23071 Jaen, Spain; (D.O.); (M.L.d.M.); (R.H.); (E.M.-L.); (E.S.); (J.R.P.)
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18
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Pozo-Torres E, Caro C, Avasthi A, Páez-Muñoz JM, García-Martín ML, Fernández I, Leal MP. Correction: Clickable iron oxide NPs based on catechol derived ligands: synthesis and characterization. Soft Matter 2021; 17:10580. [PMID: 34806102 DOI: 10.1039/d1sm90210e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Correction for 'Clickable iron oxide NPs based on catechol derived ligands: synthesis and characterization' by Esther Pozo-Torres et al., Soft Matter, 2020, 16, 3257-3266, DOI: 10.1039/C9SM02512J.
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Affiliation(s)
- Esther Pozo-Torres
- Departamento de Química Orgánica y Farmacéutica, Facultad de Farmacia, Universidad de Sevilla, 41012 Seville, Spain.
| | - Carlos Caro
- Departamento de Química Orgánica y Farmacéutica, Facultad de Farmacia, Universidad de Sevilla, 41012 Seville, Spain.
- BIONAND, Andalusian Centre for Nanomedicine and Biotechnology, Junta de Andalucía, Universidad de Málaga, C/Severo Ochoa, 35, 29590 Málaga, Spain.
| | - Ashish Avasthi
- BIONAND, Andalusian Centre for Nanomedicine and Biotechnology, Junta de Andalucía, Universidad de Málaga, C/Severo Ochoa, 35, 29590 Málaga, Spain.
| | - Jose María Páez-Muñoz
- BIONAND, Andalusian Centre for Nanomedicine and Biotechnology, Junta de Andalucía, Universidad de Málaga, C/Severo Ochoa, 35, 29590 Málaga, Spain.
| | - María Luisa García-Martín
- BIONAND, Andalusian Centre for Nanomedicine and Biotechnology, Junta de Andalucía, Universidad de Málaga, C/Severo Ochoa, 35, 29590 Málaga, Spain.
- Networking Research Center on Bioengineering, Biomaterials and Nanomedicine, CIBER-BBN, 29590 Málaga, Spain
| | - Inmaculada Fernández
- Departamento de Química Orgánica y Farmacéutica, Facultad de Farmacia, Universidad de Sevilla, 41012 Seville, Spain.
| | - Manuel Pernia Leal
- Departamento de Química Orgánica y Farmacéutica, Facultad de Farmacia, Universidad de Sevilla, 41012 Seville, Spain.
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19
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Caro C, Avasthi A, Paez-Muñoz JM, Pernia Leal M, García-Martín ML. Passive targeting of high-grade gliomas via the EPR effect: a closed path for metallic nanoparticles? Biomater Sci 2021; 9:7984-7995. [PMID: 34710207 DOI: 10.1039/d1bm01398j] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Passive tumor targeting via the enhanced permeability and retention (EPR) effect has long been considered the most effective mechanism for the accumulation of nanoparticles inside solid tumors. However, several studies have demonstrated that the EPR effect is largely dependent on the tumor type and location. Particularly complex is the situation in brain tumors, where the presence of the blood-brain tumor barrier (BBTB) adds an extra limiting factor in reaching the tumor interstitium. However, it remains unclear whether these restraints imposed by the BBTB prevent the EPR effect from acting as an efficient tumor targeting mechanism for metallic nanoparticles. In this work, we have studied the EPR effect of metallic magnetic nanoparticles (MMNPs) in a glioblastoma (GBM) model by parametric MRI. Our results showed that only MMNPs ≤50 nm could reach the tumor interstitium, whereas larger MMNPs were unable to cross the BBTB. Furthermore, even for MMNPs around 30-50 nm, the amount of them found within the tumor was scarce and restricted to the vicinity of large tumor vessels, indicating that the BBTB strongly limits the passive accumulation of metallic nanoparticles in brain tumors. Therefore, active targeting becomes the most reasonable strategy to target metallic nanoparticles to GBMs.
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Affiliation(s)
- Carlos Caro
- BIONAND - Centro Andaluz de Nanomedicina y Biotecnología (Junta de Andalucía-Universidad de Málaga), C/Severo Ochoa, 35, 29590 Málaga, Spain.
| | - Ashish Avasthi
- BIONAND - Centro Andaluz de Nanomedicina y Biotecnología (Junta de Andalucía-Universidad de Málaga), C/Severo Ochoa, 35, 29590 Málaga, Spain.
| | - Jose M Paez-Muñoz
- BIONAND - Centro Andaluz de Nanomedicina y Biotecnología (Junta de Andalucía-Universidad de Málaga), C/Severo Ochoa, 35, 29590 Málaga, Spain.
| | - Manuel Pernia Leal
- Departamento de Química Orgánica y Farmacéutica, Facultad de Farmacia, Universidad de Sevilla, 41012 Sevilla, Spain
| | - María L García-Martín
- BIONAND - Centro Andaluz de Nanomedicina y Biotecnología (Junta de Andalucía-Universidad de Málaga), C/Severo Ochoa, 35, 29590 Málaga, Spain. .,Biomedical Research Networking Center in Bioengineering, Biomaterials & Nanomedicine (CIBER-BBN), Spain
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20
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Avasthi A, Caro C, Pozo-Torres E, Leal MP, García-Martín ML. Correction to: Magnetic Nanoparticles as MRI Contrast Agents. Top Curr Chem (Cham) 2021; 379:30. [PMID: 34128112 PMCID: PMC8203541 DOI: 10.1007/s41061-021-00340-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/02/2022]
Affiliation(s)
- Ashish Avasthi
- BIONAND - Centro Andaluz de Nanomedicina y Biotecnología, Junta de Andalucía-Universidad de Málaga, C/Severo Ochoa, 35, 29590, Málaga, Spain
| | - Carlos Caro
- BIONAND - Centro Andaluz de Nanomedicina y Biotecnología, Junta de Andalucía-Universidad de Málaga, C/Severo Ochoa, 35, 29590, Málaga, Spain
| | - Esther Pozo-Torres
- Departamento de Química Orgánica y Farmacéutica, Facultad de Farmacia, Universidad de Sevilla, 41012, Seville, Spain
| | - Manuel Pernia Leal
- Departamento de Química Orgánica y Farmacéutica, Facultad de Farmacia, Universidad de Sevilla, 41012, Seville, Spain.
| | - María Luisa García-Martín
- BIONAND - Centro Andaluz de Nanomedicina y Biotecnología, Junta de Andalucía-Universidad de Málaga, C/Severo Ochoa, 35, 29590, Málaga, Spain.
- Networking Research Center on Bioengineering, Biomaterials and Nanomedicine, CIBER-BBN, Málaga, Spain.
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21
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Pandey A, Nikam AN, Padya BS, Kulkarni S, Fernandes G, Shreya AB, García MC, Caro C, Páez-Muñoz JM, Dhas N, García-Martín ML, Mehta T, Mutalik S. Surface architectured black phosphorous nanoconstructs based smart and versatile platform for cancer theranostics. Coord Chem Rev 2021. [DOI: 10.1016/j.ccr.2021.213826] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
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22
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Caro C, Freude W, Florek A, Morgenstern S, Boeer B, Roehm C, Hahn M, Marx M. Simultaneous correction of a pectus excavatum with tubular breast deformity using a custom-made silicone implant. Arch Gynecol Obstet 2021; 303:1025-1037. [PMID: 33389096 DOI: 10.1007/s00404-020-05898-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2020] [Accepted: 11/10/2020] [Indexed: 10/22/2022]
Abstract
Pectus excavatum (PE) is one of the most common congenital deformities of the thorax and is characterized by a depressed sternum with reduction of the antero-posterior thoracic diameter. Although the majority of patients with PE have no physiologic limitations, it is often associated with psychological problems influencing the patients' quality of life. Surgical treatment options show particular variation with regard to invasiveness and morbidity of the respective procedures. Surgical treatment using a custom-made silicone implant represents a less invasive alternative for patients without further accompanying physical symptoms. This article describes the simultaneous correction of a PE combined with tubular breast deformity using this minimally invasive technique.
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Affiliation(s)
- C Caro
- Department of Plastic, Reconstructive and Breast Surgery, Elbland Hospital Radebeul, Radebeul, Germany
| | - W Freude
- Department of Plastic, Reconstructive and Breast Surgery, Elbland Hospital Radebeul, Radebeul, Germany
| | - A Florek
- Department of Plastic, Reconstructive and Breast Surgery, Elbland Hospital Radebeul, Radebeul, Germany
| | - S Morgenstern
- Department of Plastic, Reconstructive and Breast Surgery, Elbland Hospital Radebeul, Radebeul, Germany
| | - B Boeer
- Department of Women's Health, University of Tübingen, Tübingen, Germany
| | - C Roehm
- Department of Women's Health, University of Tübingen, Tübingen, Germany
| | - M Hahn
- Department of Women's Health, University of Tübingen, Tübingen, Germany
| | - M Marx
- Department of Plastic, Reconstructive and Breast Surgery, Elbland Hospital Radebeul, Radebeul, Germany.
- Department of Women's Health, University of Tübingen, Tübingen, Germany.
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23
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Fernández-Álvarez F, Caro C, García-García G, García-Martín ML, Arias JL. Engineering of stealth (maghemite/PLGA)/chitosan (core/shell)/shell nanocomposites with potential applications for combined MRI and hyperthermia against cancer. J Mater Chem B 2021; 9:4963-4980. [PMID: 34114575 DOI: 10.1039/d1tb00354b] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
(Maghemite/poly(d,l-lactide-co-glycolide))/chitosan (core/shell)/shell nanoparticles have been prepared reproducibly by nanoprecipitation solvent evaporation plus coacervation (production performance ≈ 45%, average size ≈ 325 nm). Transmission electron microscopy, energy dispersive X-ray spectroscopy, electrophoretic determinations, and X-ray diffraction patterns demonstrated the satisfactory embedment of iron oxide nanocores within the solid polymer matrix and the formation of an external shell of chitosan in the nanostructure. The adequate magnetic responsiveness of the nanocomposites was characterized in vitro by hysteresis cycle determinations and by visualization of the nanosystem under the influence of a 0.4 T permanent magnet. Safety and biocompatibility of the (core/shell)/shell particles were based on in vitro haemocompatibility studies and cytotoxicity tests against HFF-1 human foreskin fibroblasts and on ex vivo toxicity assessments on tissue samples from Balb/c mice. Transversal relaxivities, determined in vitro at a low magnetic field of 1.44 T, demonstrated their capability as T2 contrast agents for magnetic resonance imaging, being comparable to that of some iron oxide-based contrast agents. Heating properties were evaluated in a high frequency alternating electromagnetic gradient: a constant maximum temperature of ≈46 °C was generated within ≈50 min, while antitumour hyperthermia tests on T-84 colonic adenocarcinoma cells proved the relevant decrease in cell viability (to ≈ 39%) when treated with the nanosystem under the influence of that electromagnetic field. Finally, in vivo magnetic resonance imaging studies and ex vivo histology determinations of iron deposits postulated the efficacy of chitosan to provide long-circulating capabilities to the nanocomposites, retarding nanoparticle recognition by the mononuclear phagocyte system. To our knowledge, this is the first study describing such a type of biocompatible and long-circulating nanoplatform with promising theranostic applications (biomedical imaging and hyperthermia) against cancer.
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Affiliation(s)
- Fátima Fernández-Álvarez
- Department of Pharmacy and Pharmaceutical Technology, Faculty of Pharmacy, University of Granada, Granada, Spain.
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24
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Morales-León F, Opazo-Capurro A, Caro C, Lincopan N, Cardenas-Arias A, Esposito F, Illesca V, Rioseco ML, Domínguez-Yévenes M, Lima CA, Bello-Toledo H, González-Rocha G. Hypervirulent and hypermucoviscous extended-spectrum β-lactamase-producing Klebsiella pneumoniae and Klebsiella variicola in Chile. Virulence 2020; 12:35-44. [PMID: 33372844 PMCID: PMC7781644 DOI: 10.1080/21505594.2020.1859274] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023] Open
Abstract
Convergence of virulence and antibiotic-resistance has been reported in Klebsiella pneumoniae, but not in Klebsiella variicola. We, hereby, report the detection and genomic characterization of hypervirulent and hypermucoviscous K. pneumoniae and K.variicola recovered in Chile from health-care associated infections, which displayed resistance to broad-spectrum cephalosporins. One hundred forty-six K. pneumoniae complex isolates were screened by hypermucoviscosity by the “string test.” Two hypermucoid isolates, one hypermucoviscous K. pneumoniae (hmKp) and one K. variicola (hmKv), were further investigated by whole-genome sequencing. In vivo virulence was analyzed by the Galleria mellonella killing assay. In silico analysis of hmKp UCO-494 and hmKv UCO-495 revealed the presence of multiple antibiotic-resistance genes, such as blaCTX-M-1, blaDHA-1 and blaLEN-25 among others clinically relevant resistance determinants, including mutations in a two-component regulatory system related to colistin resistance. These genetic features confer a multidrug-resistant (MDR) phenotype in both strains. Moreover, virulome in silico analysis confirmed the presence of the aerobactin gene iutA, in addition to yersiniabactin and/or colicin V encoding genes, which are normally associated to high virulence in humans. Furthermore, both isolates were able to kill G. mellonella and displayed higher virulence in comparison with the control strain. In summary, the convergence of virulence and the MDR-phenotype in K. pneumoniae complex members is reported for the first time in Chile, denoting a clinical problem that deserves special attention and continuous surveillance in South America.
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Affiliation(s)
- F Morales-León
- Laboratorio de Investigación en Agentes Antibacterianos, Facultad de Ciencias Biológicas, Universidad de Concepción , Concepción, Chile.,Millennium Nucleus for Collaborative Research on Bacterial Resistance , Chile.,Departamento de Farmacia, Universidad de Concepción, Concepción , Chile
| | - A Opazo-Capurro
- Laboratorio de Investigación en Agentes Antibacterianos, Facultad de Ciencias Biológicas, Universidad de Concepción , Concepción, Chile.,Millennium Nucleus for Collaborative Research on Bacterial Resistance , Chile
| | - C Caro
- Laboratorio de Investigación en Agentes Antibacterianos, Facultad de Ciencias Biológicas, Universidad de Concepción , Concepción, Chile.,Departamento de Farmacia, Universidad de Concepción, Concepción , Chile
| | - N Lincopan
- Department of Microbiology, Institute of Biomedical Sciences, Universidade de São Paulo , São Paulo, Brazil.,Department of Clinical Analysis, School of Pharmacy, Universidade de São Paulo , São Paulo, Brazil
| | - A Cardenas-Arias
- Department of Microbiology, Institute of Biomedical Sciences, Universidade de São Paulo , São Paulo, Brazil
| | - F Esposito
- Department of Microbiology, Institute of Biomedical Sciences, Universidade de São Paulo , São Paulo, Brazil.,Department of Clinical Analysis, School of Pharmacy, Universidade de São Paulo , São Paulo, Brazil
| | - V Illesca
- Unidad de Microbiología, Hospital Dr. Hernan Henriquez Aravena , Temuco, Chile
| | - M L Rioseco
- Laboratorio de Microbiologia, Hospital de Puerto Montt , Puerto Montt, Chile
| | - M Domínguez-Yévenes
- Laboratorio de Investigación en Agentes Antibacterianos, Facultad de Ciencias Biológicas, Universidad de Concepción , Concepción, Chile
| | - C A Lima
- Laboratorio de Investigación en Agentes Antibacterianos, Facultad de Ciencias Biológicas, Universidad de Concepción , Concepción, Chile.,Millennium Nucleus for Collaborative Research on Bacterial Resistance , Chile
| | - H Bello-Toledo
- Laboratorio de Investigación en Agentes Antibacterianos, Facultad de Ciencias Biológicas, Universidad de Concepción , Concepción, Chile.,Millennium Nucleus for Collaborative Research on Bacterial Resistance , Chile
| | - Gerardo González-Rocha
- Laboratorio de Investigación en Agentes Antibacterianos, Facultad de Ciencias Biológicas, Universidad de Concepción , Concepción, Chile.,Millennium Nucleus for Collaborative Research on Bacterial Resistance , Chile
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25
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Gómez-González E, Caro C, Martínez-Gutiérrez D, García-Martín ML, Ocaña M, Becerro AI. Holmium phosphate nanoparticles as negative contrast agents for high-field magnetic resonance imaging: Synthesis, magnetic relaxivity study and in vivo evaluation. J Colloid Interface Sci 2020; 587:131-140. [PMID: 33360885 DOI: 10.1016/j.jcis.2020.11.119] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2020] [Revised: 11/24/2020] [Accepted: 11/28/2020] [Indexed: 11/19/2022]
Abstract
The increasing use of high magnetic fields in magnetic resonance imaging (MRI) scanners demands new contrast agents, since those used in low field instruments are not effective at high fields. In this paper, we report the synthesis of a negative MRI contrast agent consisting of HoPO4 nanoparticles (NPs). Three different sizes (27 nm, 48 nm and 80 nm) of cube-shaped NPs were obtained by homogeneous precipitation in polyol medium and then coated with poly(acrylic) acid (PAA) to obtain stable colloidal suspensions of HoPO4@PAA NPs in physiological medium (PBS). The transverse relaxivity (r2) of aqueous suspensions of the resulting NPs was evaluated at both 1.44 T and 9.4 T. A positive correlation between r2 values and field strength as well as between r2 values and particle size at both magnetic field strengths was found although this correlation failed for the biggest NPs at 9.4 T, likely due to certain particles aggregation inside the magnet. The highest r2 value (489.91 mM-1s-1) was found for the 48 nm NPs at 9.4 T. Toxicity studies demonstrated that the latter NPs exhibited low toxicity to living systems. Finally, in vivo studies demonstrated that HoPO4@PAA NPs could be a great platform for next-generation T2-weighted MRI contrast agents at high magnetic field.
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Affiliation(s)
- Elisabet Gómez-González
- Instituto de Ciencia de Materiales de Sevilla (CSIC-US), c/Américo Vespucio, 49, 41092 Seville, Spain
| | - Carlos Caro
- BIONAND, Andalusian Centre for Nanomedicine and Biotechnology (Junta de Andalucía-Universidad de Málaga) and CIBER-BBN, Málaga 29590, Spain
| | - Diego Martínez-Gutiérrez
- Instituto de Ciencia de Materiales de Sevilla (CSIC-US), c/Américo Vespucio, 49, 41092 Seville, Spain
| | - María L García-Martín
- BIONAND, Andalusian Centre for Nanomedicine and Biotechnology (Junta de Andalucía-Universidad de Málaga) and CIBER-BBN, Málaga 29590, Spain
| | - Manuel Ocaña
- Instituto de Ciencia de Materiales de Sevilla (CSIC-US), c/Américo Vespucio, 49, 41092 Seville, Spain
| | - Ana Isabel Becerro
- Instituto de Ciencia de Materiales de Sevilla (CSIC-US), c/Américo Vespucio, 49, 41092 Seville, Spain.
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26
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Gómez-Gónzalez E, Núñez NO, Caro C, García-Martín ML, Fernández-Afonso Y, de la Fuente JM, Balcerzyk M, Ocaña M. Dysprosium and Holmium Vanadate Nanoprobes as High-Performance Contrast Agents for High-Field Magnetic Resonance and Computed Tomography Imaging. Inorg Chem 2020; 60:152-160. [PMID: 33201695 DOI: 10.1021/acs.inorgchem.0c02601] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
We describe a wet chemical method for the synthesis of uniform and well-dispersed dysprosium vanadate (DyVO4) and holmium vanadate (HoVO4) nanoparticles with an almost spherical shape and a mean size of ∼60 nm and their functionalization with poly(acrylic acid). The transverse magnetic relaxivity of both systems at 9.4 T is analyzed on the basis of magnetic susceptibility and magnetization measurements in order to evaluate their potential for application as high-field MRI contrast agents. In addition, the X-ray attenuation properties of these systems are also studied to determine their capabilities as computed tomography contrast agent. Finally, the colloidal stability under physiological pH conditions and the cytotoxicity of the functionalized NPs are also addressed to assess their suitability for bioimaging applications.
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Affiliation(s)
- Elisabet Gómez-Gónzalez
- Instituto de Ciencia de Materiales de Sevilla (CSIC-US), c/Américo Vespucio, 49, 41092 Sevilla, Spain
| | - Nuria O Núñez
- Instituto de Ciencia de Materiales de Sevilla (CSIC-US), c/Américo Vespucio, 49, 41092 Sevilla, Spain
| | - Carlos Caro
- BIONAND, Andalusian Centre for Nanomedicine and Biotechnology (Junta de Andalucía-Universidad de Málaga), 29590 Málaga, Spain.,CIBER-BBN, Av. Monforte de Lemos, 3-5. Pabellón 11. Planta 0, 28029 Madrid, Spain
| | - Maria L García-Martín
- BIONAND, Andalusian Centre for Nanomedicine and Biotechnology (Junta de Andalucía-Universidad de Málaga), 29590 Málaga, Spain.,CIBER-BBN, Av. Monforte de Lemos, 3-5. Pabellón 11. Planta 0, 28029 Madrid, Spain
| | - Yilian Fernández-Afonso
- Instituto de Nanociencia y Materiales de Aragón (INMA), CSIC-Universidad de Zaragoza, Edificio I+D, C/Mariano Esquillor s/n, 50018 Zaragoza, Spain
| | - Jesús M de la Fuente
- CIBER-BBN, Av. Monforte de Lemos, 3-5. Pabellón 11. Planta 0, 28029 Madrid, Spain.,Instituto de Nanociencia y Materiales de Aragón (INMA), CSIC-Universidad de Zaragoza, Edificio I+D, C/Mariano Esquillor s/n, 50018 Zaragoza, Spain
| | - Marcin Balcerzyk
- Centro Nacional de Aceleradores (CNA), Universidad de Sevilla, Junta de Andalucía, CSIC, c/Thomas Alva Edison 7, 41092 Sevilla, Spain.,Departamento de Fisiología Médica y Biofísica, Facultad de Medicina, Universidad de Sevilla, Avda. Sánchez- Pizjuán s/n, Sevilla 41009, Spain
| | - Manuel Ocaña
- Instituto de Ciencia de Materiales de Sevilla (CSIC-US), c/Américo Vespucio, 49, 41092 Sevilla, Spain
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Nica V, Caro C, Páez-Muñoz JM, Leal MP, Garcia-Martin ML. Bi-Magnetic Core-Shell CoFe 2O 4@MnFe 2O 4 Nanoparticles for In Vivo Theranostics. Nanomaterials (Basel) 2020; 10:nano10050907. [PMID: 32397243 PMCID: PMC7279505 DOI: 10.3390/nano10050907] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/26/2020] [Revised: 04/15/2020] [Accepted: 04/19/2020] [Indexed: 12/24/2022]
Abstract
In this work, we report the synthesis and characterization of three magnetic nanosystems, CoFe2O4, CoFe2O4@ZnFe2O4, and CoFe2O4@MnFe2O4, which were developed as potential theranostic agents for magnetic hyperthermia and magnetic resonance imaging (MRI). These nanosystems have been thoroughly characterized by X-ray Diffraction (XRD), Transmission Electron Miscroscopy (TEM), Dark Field-TEM (DF-TEM), Vibrating Sample Magnetometry (VSM), and inductive heating, in order to elucidate their structure, morphology, and magnetic properties. The bi-magnetic CoFe2O4@ZnFe2O4 and CoFe2O4@MnFe2O4 nanoparticles (NPs) exhibited a core-shell structure with a mean average particle size of 11.2 ± 1.4 nm and 14.4 ± 2.4 nm, respectively. The CoFe2O4@MnFe2O4 NPs showed the highest specific absorption rate (SAR) values (210-320 W/g) upon exposure to an external magnetic field, along with the highest saturation magnetization (Ms). Therefore, they were selected for functionalization with the PEGylated ligand to make them stable in aqueous media. After the functionalization process, the NPs showed high magnetic relaxivity values and very low cytotoxicity, demonstrating that CoFe2O4@MnFe2O4 is a good candidate for in vivo applications. Finally, in vivo MRI experiments showed that PEGylated CoFe2O4@MnFe2O4 NPs produce high T2 contrast and exhibit very good stealth properties, leading to the efficient evasion of the mononuclear phagocyte system. Thus, these bi-magnetic core-shell NPs show great potential as theranostic agents for in vivo applications, combining magnetic hyperthermia capabilities with high MRI contrast.
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Affiliation(s)
- Valentin Nica
- BIONAND—Centro Andaluz de Nanomedicina y Biotecnología (Junta de Andalucía, Universidad de Málaga), Parque Tecnológico de Andalucía, 29590 Málaga, Spain; (V.N.); (C.C.); (J.M.P.-M.)
- Department of Physics, “Alexandru Ioan Cuza” University of Iasi, 700506 Iasi, Romania
| | - Carlos Caro
- BIONAND—Centro Andaluz de Nanomedicina y Biotecnología (Junta de Andalucía, Universidad de Málaga), Parque Tecnológico de Andalucía, 29590 Málaga, Spain; (V.N.); (C.C.); (J.M.P.-M.)
| | - Jose Maria Páez-Muñoz
- BIONAND—Centro Andaluz de Nanomedicina y Biotecnología (Junta de Andalucía, Universidad de Málaga), Parque Tecnológico de Andalucía, 29590 Málaga, Spain; (V.N.); (C.C.); (J.M.P.-M.)
| | - Manuel Pernia Leal
- Departamento de Química Orgánica y Farmacéutica, Facultad de Farmacia, Universidad de Sevilla, 41012 Seville, Spain
- Correspondence: (M.P.L.); (M.L.G.-M.)
| | - Maria Luisa Garcia-Martin
- BIONAND—Centro Andaluz de Nanomedicina y Biotecnología (Junta de Andalucía, Universidad de Málaga), Parque Tecnológico de Andalucía, 29590 Málaga, Spain; (V.N.); (C.C.); (J.M.P.-M.)
- Networking Research Center on Bioengineering, Biomaterials and Nanomedicine, CIBER-BBN, 29590 Malaga, Spain
- Correspondence: (M.P.L.); (M.L.G.-M.)
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Abstract
Iron oxide nanoparticles (IONPs) have emerged as a promising alternative to conventional contrast agents (CAs) for magnetic resonance imaging (MRI). They have been extensively investigated as CAs due to their high biocompatibility and excellent magnetic properties. Furthermore, the ease of functionalization of their surfaces with different types of ligands (antibodies, peptides, sugars, etc.) opens up the possibility of carrying out molecular MRI. Thus, IONPs functionalized with epithelial growth factor receptor antibodies, short peptides, like RGD, or aptamers, among others, have been proposed for the diagnosis of various types of cancer, including breast, stomach, colon, kidney, liver or brain cancer. In addition to cancer diagnosis, different types of IONPs have been developed for other applications, such as the detection of brain inflammation or the early diagnosis of thrombosis. This review addresses key aspects in the development of IONPs for MRI applications, namely, synthesis of the inorganic core, functionalization processes to make IONPs biocompatible and also to target them to specific tissues or cells, and finally in vivo studies in animal models, with special emphasis on tumor models.
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Affiliation(s)
- Ashish Avasthi
- BIONAND - Centro Andaluz de Nanomedicina y Biotecnología, Junta de Andalucía-Universidad de Málaga, C/Severo Ochoa, 35, 29590, Málaga, Spain
| | - Carlos Caro
- BIONAND - Centro Andaluz de Nanomedicina y Biotecnología, Junta de Andalucía-Universidad de Málaga, C/Severo Ochoa, 35, 29590, Málaga, Spain
| | - Esther Pozo-Torres
- Departamento de Química Orgánica y Farmacéutica, Facultad de Farmacia, Universidad de Sevilla, 41012, Seville, Spain
| | - Manuel Pernia Leal
- Departamento de Química Orgánica y Farmacéutica, Facultad de Farmacia, Universidad de Sevilla, 41012, Seville, Spain.
| | - María Luisa García-Martín
- BIONAND - Centro Andaluz de Nanomedicina y Biotecnología, Junta de Andalucía-Universidad de Málaga, C/Severo Ochoa, 35, 29590, Málaga, Spain. .,Networking Research Center on Bioengineering, Biomaterials and Nanomedicine, CIBER-BBN, Málaga, Spain.
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Pozo-Torres E, Caro C, Avasthi A, Páez-Muñoz JM, García-Martín ML, Fernández I, Pernia Leal M. Clickable iron oxide NPs based on catechol derived ligands: synthesis and characterization. Soft Matter 2020; 16:3257-3266. [PMID: 32163076 DOI: 10.1039/c9sm02512j] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Clickable magnetic nanoparticles have attracted great attention as potential nanoplatforms for biomedical applications because of the high functionalization efficiency of their surfaces with biomolecules, which facilitates their bio-compatibilization. However, the design and synthesis of clickable NPs is still challenging because of the complexity of the chemistry on the magnetic NP surface, thus robust methods that improve the ligand synthesis and the transfer of magnetic NPs in physiological media being in high-demand. In this work, we developed a versatile and enhanced synthetic route to fabricate potentially clickable IONPs of interest in nanomedicine. Catechol anchor ligands with different stereo-electronic features were synthetized from a hetero bi-functional PEG spacer backbone. The resulting catechol ligands transferred in good yields and high stability to magnetic NPs by an improved energetic ligand exchange method that combines sonication and high temperature. The azido functionalized IONPs exhibited excellent characteristics as T2 MRI contrast agents with low cytotoxicity, making these clickable magnetic NPs promising precursors for nanomedicines.
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Affiliation(s)
- Esther Pozo-Torres
- Departamento de Química Orgánica y Farmacéutica, Facultad de Farmacia, Universidad de Sevilla, 41012 Seville, Spain.
| | - Carlos Caro
- Departamento de Química Orgánica y Farmacéutica, Facultad de Farmacia, Universidad de Sevilla, 41012 Seville, Spain.
- BIONAND, Andalusian Centre for Nanomedicine and Biotechnology, Junta de Andalucía, Universidad de Málaga, C/Severo Ochoa, 35, 29590 Málaga, Spain.
| | - Ashish Avasthi
- BIONAND, Andalusian Centre for Nanomedicine and Biotechnology, Junta de Andalucía, Universidad de Málaga, C/Severo Ochoa, 35, 29590 Málaga, Spain.
| | - Jose María Páez-Muñoz
- BIONAND, Andalusian Centre for Nanomedicine and Biotechnology, Junta de Andalucía, Universidad de Málaga, C/Severo Ochoa, 35, 29590 Málaga, Spain.
| | - María Luisa García-Martín
- BIONAND, Andalusian Centre for Nanomedicine and Biotechnology, Junta de Andalucía, Universidad de Málaga, C/Severo Ochoa, 35, 29590 Málaga, Spain.
- Networking Research Center on Bioengineering, Biomaterials and Nanomedicine, CIBER-BBN, 29590 Málaga, Spain
| | - Inmaculada Fernández
- Departamento de Química Orgánica y Farmacéutica, Facultad de Farmacia, Universidad de Sevilla, 41012 Seville, Spain.
| | - Manuel Pernia Leal
- Departamento de Química Orgánica y Farmacéutica, Facultad de Farmacia, Universidad de Sevilla, 41012 Seville, Spain.
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Caro C, Quaresma P, Pereira E, Franco J, Pernia Leal M, García-Martín ML, Royo JL, Oliva-Montero JM, Merkling PJ, Zaderenko AP, Pozo D, Franco R. Synthesis and Characterization of Elongated-Shaped Silver Nanoparticles as a Biocompatible Anisotropic SERS Probe for Intracellular Imaging: Theoretical Modeling and Experimental Verification. Nanomaterials (Basel) 2019; 9:nano9020256. [PMID: 30781838 PMCID: PMC6409692 DOI: 10.3390/nano9020256] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/27/2018] [Revised: 02/01/2019] [Accepted: 02/09/2019] [Indexed: 01/07/2023]
Abstract
Progress in the field of biocompatible SERS nanoparticles has promising prospects for biomedical applications. In this work, we have developed a biocompatible Raman probe by combining anisotropic silver nanoparticles with the dye rhodamine 6G followed by subsequent coating with bovine serum albumin. This nanosystem presents strong SERS capabilities in the near infrared (NIR) with a very high (2.7 × 107) analytical enhancement factor. Theoretical calculations reveal the effects of the electromagnetic and chemical mechanisms in the observed SERS effect for this nanosystem. Finite element method (FEM) calculations showed a considerable near field enhancement in NIR. Using density functional quantum chemical calculations, the chemical enhancement mechanism of rhodamine 6G by interaction with the nanoparticles was probed, allowing us to calculate spectra that closely reproduce the experimental results. The nanosystem was tested in cell culture experiments, showing cell internalization and also proving to be completely biocompatible, as no cell death was observed. Using a NIR laser, SERS signals could be detected even from inside cells, proving the applicability of this nanosystem as a biocompatible SERS probe.
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Affiliation(s)
- Carlos Caro
- Department of Physical, Chemical and Natural Systems, Universidad Pablo de Olavide, Carretera de Utrera Km 1, 41013 Seville, Spain.
- Departamento de Química, UCIBIO, REQUIMTE, Faculdade de Ciências, Universidade NOVA de Lisboa, 2829-516 Caparica, Portugal.
- CABIMER, Andalusian Center for Molecular Biology and Regenerative Medicine, Av. Americo Vespucio, 24, 41092 Sevilla, Spain.
- BIONAND, Andalusian Centre for Nanomedicine and Biotechnology, Junta de Andalucía, Universidad de Málaga, 29590 Málaga, Spain.
| | - Pedro Quaresma
- Departamento de Química e Bioquímica, LAQV-REQUIMTE, Faculdade de Ciências, Universidade do Porto, 4169-007 Porto, Portugal.
| | - Eulália Pereira
- Departamento de Química e Bioquímica, LAQV-REQUIMTE, Faculdade de Ciências, Universidade do Porto, 4169-007 Porto, Portugal.
| | - Jaime Franco
- CABIMER, Andalusian Center for Molecular Biology and Regenerative Medicine, Av. Americo Vespucio, 24, 41092 Sevilla, Spain.
- Department of Medical Biochemistry, Molecular Biology and Immunology, Universidad de Sevilla, Av. Sanchez Pizjuan, 4, 41009 Sevilla, Spain.
| | - Manuel Pernia Leal
- BIONAND, Andalusian Centre for Nanomedicine and Biotechnology, Junta de Andalucía, Universidad de Málaga, 29590 Málaga, Spain.
- Department of Organic and Pharmaceutical Chemistry, Universidad de Sevilla, 41012 Seville, Spain.
| | - Maria Luisa García-Martín
- BIONAND, Andalusian Centre for Nanomedicine and Biotechnology, Junta de Andalucía, Universidad de Málaga, 29590 Málaga, Spain.
| | - Jose Luis Royo
- Department of Biochemistry, Molecular Biology and Immunology, Universidad de Málaga, 29071 Málaga, Spain.
| | - Jose Maria Oliva-Montero
- Department of Physical, Chemical and Natural Systems, Universidad Pablo de Olavide, Carretera de Utrera Km 1, 41013 Seville, Spain.
| | - Patrick Jacques Merkling
- Department of Physical, Chemical and Natural Systems, Universidad Pablo de Olavide, Carretera de Utrera Km 1, 41013 Seville, Spain.
| | - Ana Paula Zaderenko
- Department of Physical, Chemical and Natural Systems, Universidad Pablo de Olavide, Carretera de Utrera Km 1, 41013 Seville, Spain.
| | - David Pozo
- CABIMER, Andalusian Center for Molecular Biology and Regenerative Medicine, Av. Americo Vespucio, 24, 41092 Sevilla, Spain.
- Department of Medical Biochemistry, Molecular Biology and Immunology, Universidad de Sevilla, Av. Sanchez Pizjuan, 4, 41009 Sevilla, Spain.
| | - Ricardo Franco
- Departamento de Química, UCIBIO, REQUIMTE, Faculdade de Ciências, Universidade NOVA de Lisboa, 2829-516 Caparica, Portugal.
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Silva M, Asenjo A, Caro C, Valdes M, Ortega C, Wolff M. HIV viremia, vertical transmission and loss to follow up on HIV pregnant Chilean and immigrant woman: comparative study at 3 years of delivery. Int J Infect Dis 2018. [DOI: 10.1016/j.ijid.2018.04.3477] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022] Open
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Abstract
Over the past few years, many papers have been published on the nanomedical applications of magnetic nanoparticles. However, most studies lack important information about the in vivo behavior of these nanoparticles, which is a critical aspect for their rational design. In this chapter we describe a simple protocol for the in vivo characterization of the pharmacokinetics of magnetic nanoparticles intravenously injected in mice, using basic MRI sequences.
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Affiliation(s)
- Carlos Caro
- BIONAND, Andalusian Centre for Nanomedicine and Biotechnology, Junta de Andalucía, Universidad de Málaga, Málaga, Spain
| | - M Carmen Muñoz-Hernández
- BIONAND, Andalusian Centre for Nanomedicine and Biotechnology, Junta de Andalucía, Universidad de Málaga, Málaga, Spain
| | - Manuel Pernia Leal
- Departamento de Química Orgánica y Farmacéutica, Universidad de Sevilla, Sevilla, Spain
| | - María Luisa García-Martín
- BIONAND, Andalusian Centre for Nanomedicine and Biotechnology, Junta de Andalucía, Universidad de Málaga, Málaga, Spain.
- Networking Research Center on Bioengineering, Biomaterials and Nanomedicine, CIBER-BBN, Málaga, Spain.
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Pernia Leal M, Caro C, García-Martín ML. Shedding light on zwitterionic magnetic nanoparticles: limitations for in vivo applications. Nanoscale 2017; 9:8176-8184. [PMID: 28581000 DOI: 10.1039/c7nr01607g] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Over the last few years several studies have dealt with the importance of the surface charge of nanoparticles in prolonging their blood circulation and minimizing their interaction with plasma proteins. These investigations claimed that zwitterionic nanoparticles exhibited a minimal macrophage response and long blood circulation times compared to nanoparticles with other surface charges. These differences in their in vivo behavior are mainly attributed to the interaction of nanoparticles with plasma proteins. Interestingly, most of these studies considered the total surface charge, instead of the outermost layer of the nanomaterial, as being mainly responsible for these undesirable interactions. However, the first contact with plasma proteins is most likely due to the outermost layer on the nanomaterials. Therefore, here we report a detailed study on the effect of the outermost surface charge of magnetic nanoparticles with regard to biodistribution, pharmacokinetics and bioavailability. Magnetic nanoparticles, coated with PEG chains functionalized with neutral, positive or zwitterionic groups, were intravenously injected into mice, followed in vivo by MRI and then quantified by ICP-MS in blood and the main organs. We found that neutral nanoparticles exhibited long blood circulation times, very good stealth properties and the highest bioavailability, whereas zwitterionic nanoparticles were readily recognized by the mononuclear phagocyte system and avidly taken up by the liver. Also, zwitterionic nanoparticles showed high non-specific cell internalization, whereas neutral nanoparticles showed the lowest cellular uptake, indicating that they require active transport to cross the plasma membrane, which is the desirable situation for therapeutic vehicles with low side effects. Thus, neutral nanoparticles exhibit very favorable characteristics for in vivo applications, whereas zwitterionic nanoparticles show important limitations.
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Affiliation(s)
- Manuel Pernia Leal
- BIONAND, Andalusian Centre for Nanomedicine and Biotechnology, Universidad de Málaga, 29590 Málaga, Spain.
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Caro C, Dalmases M, Figuerola A, García-Martín ML, Leal MP. Highly water-stable rare ternary Ag-Au-Se nanocomposites as long blood circulation time X-ray computed tomography contrast agents. Nanoscale 2017; 9:7242-7251. [PMID: 28513714 DOI: 10.1039/c7nr01110e] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
X-ray computed tomography (CT) is a powerful and widely used medical non-invasive technique that often requires intravenous administration of contrast agents (CAs) to better visualize soft tissues. In this work, we have developed a novel CT contrast agent based on ternary Ag-Au-Se chalcogenide nanoparticles (NP). A facile ligand exchange by using a 3 kDa PEGylated ligand with a dithiol dihydrolipoic acid as an anchor group resulted in highly water-soluble and monodisperse nanoparticles. These PEGylated ternary NPs were tested in vivo in mice, showing slow uptake by the mononuclear phagocyte system, long blood circulation times, low toxicity, and very good X-ray contrast, thus being promising candidates as CT contrast agents for clinical applications.
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Affiliation(s)
- Carlos Caro
- BIONAND, Andalusian Centre for Nanomedicine and Biotechnology (Junta de Andalucía-Universidad de Málaga), Málaga, Spain.
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35
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Affiliation(s)
- Carlos Caro
- BIONAND,
Andalusian Centre for Nanomedicine and Biotechnology, Universidad de Málaga, 29590 Málaga, Spain
- Departamento
de Química Orgánica y Farmacéutica, Universidad de Sevilla, C/Profesor García González 2, 41012 Seville, Spain
| | - María Luisa García-Martín
- BIONAND,
Andalusian Centre for Nanomedicine and Biotechnology, Universidad de Málaga, 29590 Málaga, Spain
- Networking
Research Center on Bioengineering, Biomaterials and Nanomedicine, CIBER-BBN,
29590 Málaga, Spain
| | - Manuel Pernia Leal
- BIONAND,
Andalusian Centre for Nanomedicine and Biotechnology, Universidad de Málaga, 29590 Málaga, Spain
- Departamento
de Química Orgánica y Farmacéutica, Universidad de Sevilla, C/Profesor García González 2, 41012 Seville, Spain
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Abstract
Cancer disease is one of the leading causes of morbidity and mortality worldwide, with approximately 14 million new cases and around 8 million cancer-related deaths yearly. Estimates expect to increase these figures over the next few years. Therefore, it is very important to develop more effective and targeted therapies. Polysaccharides are widely used for biomedical and pharmaceutical applications due to their interesting properties, and can be utilised in the production of nanovehicles for drug delivery, since they frequently extend the half-life and improve the stability of chemotherapeutic agents in bloodstream allowing them to reach the tumour tissue. Moreover, polysaccharide-based nanovehicles are generally expected to increase the therapeutic benefit by reducing the undesired side effects and promoting a more efficient cellular uptake. Here, we highlight the application of various polysaccharides as nanovehicles in cancer therapy, focusing mainly on in vivo applications and describing the main advantages of each designed system in a critical way. The use of different polysaccharides interacting with metal nanoparticles to develop new nanovehicles for cancer therapy will also be discussed.
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Affiliation(s)
- Carlos Caro
- CABIMER, Andalusian Centre for Molecular Biology and Regenerative Medicine, CSIC-UPOUniversity of Seville, Seville, Spain.
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Tempera C, Franco R, Caro C, André V, Eaton P, Burke P, Hänscheid T. Characterization and optimization of the haemozoin-like crystal (HLC) assay to determine Hz inhibiting effects of anti-malarial compounds. Malar J 2015; 14:403. [PMID: 26458401 PMCID: PMC4603294 DOI: 10.1186/s12936-015-0913-y] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2015] [Accepted: 09/25/2015] [Indexed: 01/13/2023] Open
Abstract
Background The haem-haemozoin biocrystallization pathway is an attractive target where several efficacious and safe anti-malarial drugs act. Consequently, in vitro haemozoin (Hz) inhibition assays have been developed to identify novel compounds. However, results may differ between assays and often require complex methods or sophisticated infrastructure. The recently reported growth of haemozoin-like crystals (HLC) appears to be a simple alternative although the endproduct is structurally different to Hz. This study set out to characterize this assay in depth, optimize it, and assess its performance. Methods The HLC assay was used as previously described but a range of different growth conditions were examined. Obtained HLCs were investigated and compared to synthetic (sHz) and natural haemozoin (nHz) using scanning electron microscopy, powder X-ray diffraction (PXRD), Fourier Transform Infrared spectroscopy (FTIR) and Raman spectroscopy (RS). Interactions of HLC with quinolines was analysed using RS. Inhibitory effects of currently used anti-malarial drugs under four final growth conditions were established. Results HLC growth requires Mycoplasma Broth Base, Tween 80, pancreatin, and lysed blood or haemin. HLCs are similar to nHz and sHz in terms of solubility, macroscopic and microscopic appearance although PXRD, FTIR and RS confirm that the haem aggregates of HLCs are structurally different. RS reveals that CQ seems to interact with HLCs in similar ways as with Hz. Inhibition of quinoline drugs ranged from 62.5 µM (chloroquine, amodiaquine, piperaquine) to 500 µM in mefloquine. Conclusions The HLC assay provides data on inhibiting properties of compounds. Even if the end-product is not structurally identical to Hz, the inhibitory effects appear consistent with those obtained with sHz assays, as illustrated by the results obtained for quinolines. The assay is simple, inexpensive, robust, reproducible and can be performed under basic laboratory conditions with a simple visual positive/negative read-out. Electronic supplementary material The online version of this article (doi:10.1186/s12936-015-0913-y) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Carolina Tempera
- Faculdade de Medicina de Lisboa, Instituto de Medicina Molecular, Av. Prof. Egas Moniz, 1649-028, Lisbon, Portugal.
| | - Ricardo Franco
- Departamento de Química, Faculdade de Ciências e Tecnologia, UCIBIO, REQUIMTE, Universidade NOVA de Lisboa, 2829-516, Caparica, Portugal.
| | - Carlos Caro
- Departamento de Química, Faculdade de Ciências e Tecnologia, UCIBIO, REQUIMTE, Universidade NOVA de Lisboa, 2829-516, Caparica, Portugal.
| | - Vânia André
- Centro de Química Estrutural, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, 1049-001, Lisbon, Portugal.
| | - Peter Eaton
- , Departamento de Química e Bioquímica, Faculdade de Ciências, REQUIMTE/UCIBIO, Universidade do Porto, 4169-007, Porto, Portugal.
| | - Peter Burke
- STERIS Corporation, 5960 Heisley Road, Mentor, OH, 44060, USA.
| | - Thomas Hänscheid
- Faculdade de Medicina de Lisboa, Instituto de Medicina Molecular, Av. Prof. Egas Moniz, 1649-028, Lisbon, Portugal. .,Faculdade de Medicina, Instituto de Microbiologia, Lisbon, Portugal.
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Kandulski A, Weigt J, Caro C, Jechorek D, Wex T, Malfertheiner P. Esophageal intraluminal baseline impedance differentiates gastroesophageal reflux disease from functional heartburn. Clin Gastroenterol Hepatol 2015; 13:1075-81. [PMID: 25496815 DOI: 10.1016/j.cgh.2014.11.033] [Citation(s) in RCA: 87] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/28/2014] [Revised: 10/15/2014] [Accepted: 11/10/2014] [Indexed: 02/06/2023]
Abstract
BACKGROUND & AIMS Mucosal integrity can be assessed in patients with gastroesophageal reflux disease (GERD) by measuring intraluminal baseline impedance (BI). However, it is not clear whether BI is abnormal in patients with functional heartburn (FH), or can be used to distinguish them from patients with GERD. We compared differences in BI between patients with FH vs GERD. METHODS We performed a prospective study of 52 patients (16 men; mean age, 55 y; range, 23-78 y) seen at a tertiary university hospital from February 2009 through December 2012. Thirty-five patients had GERD (19 had nonerosive reflux disease [NERD], 16 had erosive reflux disease [ERD]) and 17 had FH. All patients discontinued proton pump inhibitor therapy and then underwent esophagogastroduodenoscopy and multichannel intraluminal impedance and pH monitoring. BI was assessed at 3, 5, 7, 9, 15, and 17 cm proximal to the lower esophageal sphincter in recumbent patients. Biopsy specimens were taken from 3 cm above the gastroesophageal junction; histology analysis was performed to identify and semiquantitatively score (scale, 0-3) dilated intercellular spaces. RESULTS Baseline impedance in the distal esophagus was significantly lower in patients with NERD or erosive reflux disease (ERD) than FH (P = .0006). At a cut-off value of less than 2100 Ω, BI measurements identified patients with GERD with 78% sensitivity and 71% specificity, with positive and negative predictive values of 75%. Also in the proximal esophagus, reduced levels of BI levels were found only in patients with ERD. There were negative correlations between level of BI and acid exposure time (r = -0.45; P = .0008), number of acidic reflux episodes (r = -0.45; P = .001), and proximal extent (r = -0.40; P = .004). Biopsy specimens from patients with NERD or ERD had significant increases in dilation of intercellular spaces, compared with those from patients with FH; there was an inverse association between dilated intercellular spaces and BI in the distal esophagus (r = -0.28; P = .06). CONCLUSIONS Measurement of BI in the lower esophagus can differentiate patients with ERD or NERD from patients with FH (78% sensitivity and 71% specificity), and therefore should be considered as a diagnostic tool for patients with proton pump inhibitor-refractory reflux. Low levels of BI are associated with increased exposure to acid and dilation of intercellular spaces, indicating that BI is a marker of mucosal integrity.
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Affiliation(s)
- Arne Kandulski
- Department of Gastroenterology, Hepatology and Infectious Diseases, Otto-von-Guericke University, Magdeburg, Germany.
| | - Jochen Weigt
- Department of Gastroenterology, Hepatology and Infectious Diseases, Otto-von-Guericke University, Magdeburg, Germany
| | - Carlos Caro
- Department of Gastroenterology, Hepatology and Infectious Diseases, Otto-von-Guericke University, Magdeburg, Germany
| | - Doerthe Jechorek
- Institute of Pathology, Otto-von-Guericke University, Magdeburg, Germany
| | - Thomas Wex
- Department of Gastroenterology, Hepatology and Infectious Diseases, Otto-von-Guericke University, Magdeburg, Germany; Medical Laboratory for Clinical Chemistry, Microbiology and Infectious Diseases, Department of Molecular Genetics, Magdeburg, Germany
| | - Peter Malfertheiner
- Department of Gastroenterology, Hepatology and Infectious Diseases, Otto-von-Guericke University, Magdeburg, Germany
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Araújo A, Caro C, Mendes MJ, Nunes D, Fortunato E, Franco R, Águas H, Martins R. Highly efficient nanoplasmonic SERS on cardboard packaging substrates. Nanotechnology 2014; 25:415202. [PMID: 25257959 DOI: 10.1088/0957-4484/25/41/415202] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
This work reports on highly efficient surface enhanced Raman spectroscopy (SERS) constructed on low-cost, fully recyclable and highly reproducible cardboard plates, which are commonly used as disposable packaging material. The active optical component is based on plasmonic silver nanoparticle structures separated from the metal surface of the cardboard by a nanoscale dielectric gap. The SERS response of the silver (Ag) nanoparticles of various shapes and sizes were systematically investigated, and a Raman enhancement factor higher than 106 for rhodamine 6G detection was achieved. The spectral matching of the plasmonic resonance for maximum Raman enhancement with the optimal local electric field enhancement produced by 60 nm-sized Ag NPs predicted by the electromagnetic simulations reinforces the outstanding results achieved. Furthermore, the nanoplasmonic SERS substrate exhibited high reproducibility and stability. The SERS signals showed that the intensity variation was less than 5%, and the SERS performance could be maintained for up to at least 6 months.
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Kandulski A, Jechorek D, Caro C, Weigt J, Wex T, Mönkemüller K, Malfertheiner P. Histomorphological differentiation of non-erosive reflux disease and functional heartburn in patients with PPI-refractory heartburn. Aliment Pharmacol Ther 2013; 38:643-51. [PMID: 23895770 DOI: 10.1111/apt.12428] [Citation(s) in RCA: 54] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/12/2013] [Revised: 03/30/2013] [Accepted: 07/04/2013] [Indexed: 12/12/2022]
Abstract
BACKGROUND Proton pump inhibitor (PPI)-refractory heartburn may be due to persistent gastro-oesophageal reflux, oesophageal hypersensitivity or functional heartburn (FH). The differentiation between non-erosive reflux disease (NERD) and FH may be very difficult. However, this differentiation is important for appropriate therapeutic management. Dilated intercellular spaces (DIS), papillary elongation (PE) and basal cell hyperplasia (BCH) can be all assessed by light microscopy. Whether these mucosal abnormalities allow the differentiation of NERD from FH in PPI-refractory patients is uncertain. AIM To assess histopathological findings by light microscopy in patients with refractory heartburn to differentiate NERD from FH. METHODS Sixty-two patients with PPI-refractory symptoms underwent EGD and MII-pH after pausing PPI medication for 2 weeks before investigation. Twenty-five subjects without upper gastrointestinal symptoms were included as controls. Symptom assessment was based on the reflux disease questionnaire (RDQ). Biopsies were taken 3-5 cm above the gastro-oesophageal junction. DIS, PE, BCH and infiltration of immune cells were evaluated and a sum score was calculated. RESULTS Based on endoscopy and MII-pH, GERD was diagnosed in 43 patients (NERD: 20; ERD: 23) and FH in 19 patients. There was no difference in symptoms between the groups. Each individual histopathological item was different between the groups (P < 0.0001). Between NERD and FH, the most significant difference was found for DIS and the histopathological sum score (P < 0.001). CONCLUSIONS These findings suggest that oesophageal biopsies are useful to differentiate NERD from FH. Increased DIS and a histological sum score are the most significant histopathological abnormalities in NERD as compared with FH.
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Affiliation(s)
- A Kandulski
- Department of Gastroenterology, Hepatology and Infectious Diseases, Otto-von-Guericke University, Magdeburg, Germany
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McCullough KP, Lok CE, Fluck RJ, Spergel LM, Andreucci VE, Fort J, Krishnan M, Fissell RB, Kawanishi H, Saran R, Port FK, Robinson BM, Pisoni RL, Shinzato T, Shionoya Y, Fukui H, Sasaki M, Miwa M, Toma S, Lin CC, Yang WC, Simone S, Loverre A, Cariello M, Divella C, Castellano G, Gesualdo L, Grandaliano G, Pertosa G, Mattei S, Pignatelli G, Corradini M, Stefani A, Bovino A, Iannuzzella F, Vaglio A, Manari A, Pasquali S, Chan JS, Wu TC, Roy-Chaudhury P, Shih CC, Chen JW, Ponce P, Scholz C, Goncalves P, Grassmann A, Canaud B, Marcelli D, Suzuki S, Shibata K, Kuji T, Kawata S, Koguchi N, Nishihara M, Satta H, Toya Y, Umemura S, Corbett R, Demicheli N, Iori F, Grechy L, Khiroya R, Ellis D, Crane J, Hamady M, Gedroyc W, Duncan N, Vincent P, Caro C, Sarween N, Price A, Powers S, Allen C, Holland M, Gupta I, Baharani J, Parisotto MT, Schoder V, Kaufmann P, Miriunis C, Grassmann A, Marcelli D, Moura A, Madureira J, Alija P, Fernandes J, Oliveira JG, Lopez M, Felgueiras M, Amado L, Sameiro-Faria M, Miranda V, Vieira M, Santos-Silva A, Costa E, David P, Capurro F, Brustia M, De Mauri A, Ruva C, Chiarinotti D, Gravellone L, De Leo M, Turkvatan A, Kirkpantur A, Mandiroglu S, Afsar B, Seloglu B, Alkis M, Erkula S, GURBUZ HG, Serin M, CALIK Y, Mandiroglu F, Balci M, Rikker C, Juhasz E, Tornoci L, Tovarosi S, Greguschik J, Rosivall L, Ibeas J, Valeriano J, Vallespin J, Fortuno J, Rodriguez-Jornet A, Cabre C, Merino J, Vinuesa X, Bolos M, Branera J, Mateos A, Jimeno V, Grau C, Criado E, Moya C, Ramirez J, Gimenez A, Garcia M, Kirmizis D, Kougioumtzidou O, Vakianis P, Bandera A, Veniero P, Brunori G, Dimitrijevic Z, Cvetkovic T, Paunovic K, Stojanovic M, Ljubenovic S, Mitic B, Djordjevic V, Aicha Henriette S, Farideh A, Daniela B, Zafer T, Francois C, Ibeas J, Vallespin J, Fortuno J, Merino J, Vinuesa X, Branera J, Mateos A, Jimeno V, Bolos M, Rodriguez-Jornet A, Gimenez A, Garcia M, Donati G, Scrivo A, Cianciolo G, La Manna G, Panicali L, Rucci P, Marchetti A, Giampalma E, Galaverni M, Golfieri R, Stefoni S, Skornyakov I, Kiselev N, Rozhdestvenskaya A, Stolyar A, Ancarani PPA, Devoto E, Dardano GGD, Coskun yavuz Y, Selcuk NY, Guney I, Altintepe L, Gerasimovska V, Gerasimovska-Kitanovska B, Persic V, Buturovic-Ponikvar J, Arnol M, Ponikvar R, Brustia M, De Mauri A, Conti N, Chiarinotti D, De Leo M, Capurro F, David P, Scrivano J, Pettorini L, Giuliani A, Punzo G, Mene P, Pirozzi N, Balci M, Turkvatan A, Mandiroglu S, Afsar B, Mandiroglu F, Kirkpantur A, Kocyigit I, Unal A, Guney A, Mavili E, Deniz K, Sipahioglu M, Eroglu E, Tokgoz B, Oymak O, Gunal A, Boubaker K, Kaaroud H, Kheder A, Ibeas J, Vidal M, Vallespin J, Amengual MJ, Merino J, Orellana R, Sanfeliu I, Rodriguez-Jornet A, Vinuesa X, Marquina D, Xirinachs M, Sanchez E, Moya C, Ramirez J, Rey M, Gimenez A, Garcia M, Strozecki P, Flisinski M, Kapala A, Manitius J, Gerasimovska V, Gerasimovska-Kitanovska BD, Sikole A, Weber E, Adrych D, Wolyniec W, Liberek T, Rutkowski B, Afsar B, Oguchi K, Nakahara T, Okamoto M, Iwabuchi H, Asano M, Rap O, Ruiz-Valverde M, Rodriguez-Murillo JA, Mallafre-Anduig JM, Zeid MM, Deghady AA, Elshair HS, Elkholy NA, Panagoutsos S, Devetzis V, Roumeliotis A, Kantartzi K, Mourvati E, Vargemezis V, Passadakis P, Kang SH, Jung SY, Lee SH, Cho KH, Park JW, Yoon KW, Do JY. Vascular access. Nephrol Dial Transplant 2013. [DOI: 10.1093/ndt/gft118] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Caro C, Schütte K, Pech M, Malfertheiner P, Meyer F. [Successful control of iatrogenic bleeding after endoscopic papillotomy by means of supraselective microcatheterisation and coiling in a patient with a suspicious tumour mass at the pancreatic head and atypical arteriohepatic perfusion (Michels Type IV)]. Zentralbl Chir 2012; 139:326-8. [PMID: 22565498 DOI: 10.1055/s-0031-1283919] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Affiliation(s)
- C Caro
- Universitätsklinikum Magdeburg A. ö. R., Klinik für Gastroenterologie, Hepatologie & Infektiologie, Magdeburg, Deutschland
| | - K Schütte
- Universitätsklinikum Magdeburg A. ö. R., Klinik für Gastroenterologie, Hepatologie & Infektiologie, Magdeburg, Deutschland
| | - M Pech
- Universitätsklinikum Magdeburg A. ö. R., Klinik für Radiologie & Nuklearmedizin, Magdeburg, Deutschland
| | - P Malfertheiner
- Universitätsklinikum Magdeburg A. ö. R., Klinik für Gastroenterologie, Hepatologie & Infektiologie, Magdeburg, Deutschland
| | - F Meyer
- Universitätsklinikum Magdeburg A. ö. R., Klinik für Allgemein-, Viszeral- & Gefäßchirurgie, Magdeburg, Deutschland
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Caro C, Thirunavukkarasu K, Anilkumar M, Shiju NR, Rothenberg G. Selective Autooxidation of Ethanol over Titania-Supported Molybdenum Oxide Catalysts: Structure and Reactivity. Adv Synth Catal 2012; 354:1327-1336. [PMID: 23396482 PMCID: PMC3563225 DOI: 10.1002/adsc.201000841] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2010] [Revised: 10/29/2011] [Indexed: 11/07/2022]
Abstract
We study the selective catalytic oxidation of ethanol with air as a sustainable alternative route to acetaldehyde. The reaction is catalysed by molybdenum oxide supported on titania, in a flow reactor under ambient pressure. High selectivity to acetaldehyde (70%–89%, depending on the Mo loading) is obtained at 150 °C. Subsequently, we investigate the structure/performance relationship for various molybdenum oxide species using a combination of techniques including diffuse reflectance UV-visible, infrared, X-ray photoelectron spectroscopies, X-ray diffraction and temperature programmed reduction. As their surface density increases, the monomeric molybdenum oxide species undergo two-dimensional and three-dimensional oligomerisation. This results in polymolybdates and molybdenum oxide crystallites. Importantly, the ethanol oxidation rate depends not only on the overall molybdenum loading and dispersion, but also on the type of molybdenum oxide species prevalent at each surface density and on the domain size. As the molybdenum oxide oligomerisation increases, electron delocalisation becomes easier. This lowers the absorption edge energy and increases the reaction rate.
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Affiliation(s)
- Carlos Caro
- Van 't Hoff Institute for Molecular Sciences, University of Amsterdam Science Park 904, 1090 GD Amsterdam, The Netherlands, ; e-mail: or ; Department of Physical, Chemical and Natural Systems, Universidad Pablo de Olavide, Carretera de Utrera Km 1 41013 Sevilla, Spain
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Jovanovic I, Caro C, Neumann H, Lux A, Kuester D, Fry LC, Malfertheiner P, Mönkemüller K. The submucosal cushion does not improve the histologic evaluation of adenomatous colon polyps resected by snare polypectomy. Clin Gastroenterol Hepatol 2011; 9:910-3. [PMID: 21723231 DOI: 10.1016/j.cgh.2011.06.027] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/25/2010] [Revised: 06/14/2011] [Accepted: 06/19/2011] [Indexed: 02/07/2023]
Abstract
BACKGROUND & AIMS Although the "submucosal cushion" technique or injection-assisted polypectomy (IAP) is often used to resect colon polyps, little is known on the influence of this technique on histologic interpretation. We aimed to evaluate whether the use of a submucosal cushion improves the histologic and margin evaluation of colon polyps. METHODS Consecutive patients undergoing polypectomy with and without IAP were included. An experienced blinded gastrointestinal pathologist evaluated the specimens using standardized criteria. RESULTS One hundred eleven sessile colon adenomas were analyzed (IAP, n = 65, standard, n = 46). Two-thirds of polyps ranged in size from 10 to 20 mm; the average polyp size was 13.2 mm for IAP and 9.9 mm for standard snare polypectomy (P = .001). The cautery degree, cautery amount, and margin evaluability, did not differ substantially with regard to the resection technique. For polyps ≥10-20 mm, the overall architecture quality was better in polyps resected with standard technique as compared with IAP. CONCLUSIONS The utilization of IAP did not result in a better margin evaluability of the resected polyp. Overall, IAP does not result in a better histologic polyp evaluability.
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Affiliation(s)
- Ivan Jovanovic
- Clinic for Gastroenterology and Hepatology, Clinical Center of Serbia, Belgrade, Serbia
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Lillo L, Alarcón J, Céspedes CL, Cabello G, Canto P, Caro C. Antibacterial Activity of an Oligosaccharide of Native Paecilomyces sp. and its Aminoglycosylated Derivative. Z NATURFORSCH C 2011. [DOI: 10.5560/znc.2011.66c0123] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Castillo PM, Herrera JL, Fernandez-Montesinos R, Caro C, Zaderenko AP, Mejías JA, Pozo D. Tiopronin monolayer-protected silver nanoparticles modulate IL-6 secretion mediated by Toll-like receptor ligands. Nanomedicine (Lond) 2009; 3:627-35. [PMID: 18834270 DOI: 10.2217/17435889.3.5.627] [Citation(s) in RCA: 60] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023] Open
Abstract
AIMS Capped silver nanoparticles that can be coupled to a variety of molecules and biomolecules are of great interest owing to their potential applications in biomedicine. However, there are no data about their toxicity or functional effects on a key innate immune response, such as IL-6 secretion, after the engagement of the main group of pathogen-associated molecular patterns receptors, that is, the Toll-like receptors (TLRs). MATERIALS & METHODS N-(2-mercaptopropionyl)glycine (tiopronin)-capped silver (Ag@tiopronin) nanoparticles of a narrow sized distribution ( approximately 5 nm) were synthesized and characterized by transmission electron microscopy, Fourier transform infrared spectroscopy, Raman, (1)H-NMR and total correlation spectroscopy. Cytotoxicity was determined by lactate deshidrogenase and 3-[4,5-dimethylthiazol-2-yl]-2,5-diphenyl tetrazolium assays in Raw 264.7 macrophages. IL-6 was measured by ELISA. RESULTS & DISCUSSION Ag@tiopronin nanoparticles have a narrow size distribution ( approximately 5 nm), high solubility and stability in aqueous environment with no cytotoxicity in terms of mitochondrial function or plasma-membrane integrity at concentrations as high as 200 microg/10(6) cells. Ag@tiopronin nanoparticles were not proinflammatory agents, but remarkably they specifically impaired the IL-6 secretion mediated by TLR2, TLR2/6, TLR3 or TLR9 stimulation in co-treatment experiments. However, in pretreatment experiments, nanoparticles enhanced the susceptibility of macrophages to inflammatory stimulation mediated by TLR2/1 and TLR2/6 specific ligands while severely impairing the IL-6 secretion activated by the TLR3 or TLR9 ligands. CONCLUSIONS Contrary to what is found for bare silver nanoparticles, Ag@tiopronin nanoparticles are noncytotoxic to macrophages. Ag@tiopronin nanoparticles showed differential effects on TLR signaling of a high degree of specificity, without proinflammatory effects by themselves. These effects have to be borne in mind when using bioconjugates of Ag@tiopronin nanoparticles for future medical applications.
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Affiliation(s)
- Paula M Castillo
- Department of Physical, Chemical & Natural Systems, Pablo de Olavide University, Seville, Spain
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Abstract
We have studied numerically steady and unsteady flow in a straight and a helically stented common carotid artery, in order to model porcine experimental results that show reduced intimal hyperplasia (IH) in the helical case. The combination of flow pulsatility and three-dimensionality generates a sweeping motion of the Dean vortices, which overall reduced extremes of both oxygen flux to the vessel wall and wall shear stress (WSS). Since IH and atherosclerosis affect preferentially low WSS regions, these findings imply that vessel three-dimensionality and flow pulsatility can play important protective roles in respect of these diseases. The amplitude and frequency of the velocity waveform are important parameters of the system. Increase in amplitude increases WSS and oxygen flux to the vessel wall. Increase in frequency has a small effect; it increases WSS but has no effect on the oxygen flux to the vessel wall.
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Affiliation(s)
- G Coppola
- Department of Bioengineering, Imperial College, London SW7 2AZ, UK.
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Abstract
Arterial geometry is commonly non-planar and associated with swirling blood flow. In this study, we examine the effect of arterial three-dimensionality on the distribution of wall shear stress (WSS) and the mass transfer of oxygen from the blood to the vessel wall in a U-bend, by modelling the blood vessels as either cylindrical or helical conduits. The results show that under physiological flow conditions, three-dimensionality can reduce both the range and extent of low WSS regions and substantially increase oxygen flux through the walls. The Sherwood number and WSS distributions between the three-dimensional helical model and a human coronary artery show remarkable qualitative agreement, implying that coronary arteries may potentially be described with a relatively simple idealized three-dimensional model, characterized by a small number of well-defined geometric parameters. The flow pattern downstream of a planar bend results in separation of the Sh number and WSS effects, a finding that implies means of investigating them individually.
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Affiliation(s)
- G Coppola
- Department of Bioengineering, Imperial College London, London SW7 2AZ, UK
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Stojanova A, Caro C, Jarjour RJV, Oster SK, Penn LZ, Germinario RJ. Repression of the human immunodeficiency virus type-1 long terminal repeat by the c-Myc oncoprotein. J Cell Biochem 2005; 92:400-13. [PMID: 15108364 DOI: 10.1002/jcb.20065] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
The effect of trans-acting factors on cis-acting DNA elements on the HIV-1 promoter are the principal determinant regulating transcriptional activation and repression. Host factors that limit viral replication can contribute to the emergence and maintenance of proviral reservoirs. The current paradigm is that this sub-population of latently infected cells confers a biological advantage to the virus by facilitating evasion of immunologic responses and therapeutic strategies resulting in life-long and persistent infection. In this report, we show that ectopic expression of the nuclear phosphoprotein, c-Myc can inhibit HIV-1 gene expression and virus production in CD4+ T-lymphocytes. The effect exerted does not appear to involve other known functions of c-Myc such as proliferation, or apoptosis. The mechanism does implicate c-Myc in a direct role. We have found evidence that c-Myc can specifically recognize the HIV-1 initiator element surrounding the start site of transcription and linker scanning mutagenesis experiments confirmed a loss of c-Myc-mediated repression in the absence of this region. Moreover, we show that c-Myc can interact with the initiator binding proteins YY-1 and LBP-1 and can cooperate with these factors to synergistically repress HIV-1 LTR transcription. Taken together, these results indicate that c-Myc is an important regulator of HIV-1 transcription that potentially contributes to the latent proviral state.
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Affiliation(s)
- A Stojanova
- Lady Davis Institute of the SMBD-Jewish General Hospital, and Department of Biology, Concordia University, Montreal, Quebec, Canada
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