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Ibarra J, Encinas-Basurto D, Almada M, Juárez J, Valdez MA, Barbosa S, Taboada P. Gold Half-Shell-Coated Paclitaxel-Loaded PLGA Nanoparticles for the Targeted Chemo-Photothermal Treatment of Cancer. Micromachines (Basel) 2023; 14:1390. [PMID: 37512701 PMCID: PMC10384528 DOI: 10.3390/mi14071390] [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: 05/18/2023] [Revised: 06/16/2023] [Accepted: 07/05/2023] [Indexed: 07/30/2023]
Abstract
Conventional cancer therapies suffer from nonspecificity, drug resistance, and a poor bioavailability, which trigger severe side effects. To overcome these disadvantages, in this study, we designed and evaluated the in vitro potential of paclitaxel-loaded, PLGA-gold, half-shell nanoparticles (PTX-PLGA/Au-HS NPs) conjugated with cyclo(Arg-Gly-Asp-Phe-Lys) (cyRGDfk) as a targeted chemo-photothermal therapy system in HeLa and MDA-MB-231 cancer cells. A TEM analysis confirmed the successful gold half-shell structure formation. High-performance liquid chromatography showed an encapsulation efficiency of the paclitaxel inside nanoparticles of more than 90%. In the release study, an initial burst release of about 20% in the first 24 h was observed, followed by a sustained drug release for a period as long as 10 days, reaching values of about 92% and 49% for NPs with and without near infrared laser irradiation. In in vitro cell internalization studies, targeted nanoparticles showed a higher accumulation than nontargeted nanoparticles, possibly through a specific interaction of the cyRGDfk with their homologous receptors, the ανβ3 y ανβ5 integrins on the cell surface. Compared with chemotherapy or photothermal treatment alone, the combined treatment demonstrated a synergistic effect, reducing the cell viability to 23% for the HeLa cells and 31% for the MDA-MB-231 cells. Thus, our results indicate that these multifuncional nanoparticles can be considered to be a promising targeted chemo-photothermal therapy system against cancer.
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Affiliation(s)
- Jaime Ibarra
- Departamento de Física, Matemáticas e Ingeniería, Universidad de Sonora, Campus Navojoa, Navojoa 85880, Sonora, Mexico
| | - David Encinas-Basurto
- Departamento de Física, Matemáticas e Ingeniería, Universidad de Sonora, Campus Navojoa, Navojoa 85880, Sonora, Mexico
| | - Mario Almada
- Departamento de Ciencias Químico-Biológicas y Agropecuarias, Universidad de Sonora, Campus Navojoa, Navojoa 85880, Sonora, Mexico
| | - Josué Juárez
- Departamento de Física, Universidad de Sonora, Campus Hermosillo, Hermosillo 83000, Sonora, Mexico
| | - Miguel Angel Valdez
- Departamento de Física, Universidad de Sonora, Campus Hermosillo, Hermosillo 83000, Sonora, Mexico
| | - Silvia Barbosa
- Departamento de Física de Partículas, Universidad de Santiago de Compostela, 15782 Santiago de Compostela, A Coruña, Spain
| | - Pablo Taboada
- Departamento de Física de Partículas, Universidad de Santiago de Compostela, 15782 Santiago de Compostela, A Coruña, Spain
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2
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Orellana N, Palma S, Torres E, Cordero ML, Vio V, Ruso JM, Juárez J, Topete A, Araya E, Vasquez-Contreras R, Kogan MJ, Hassan N. Study of the interaction of folic acid-modified gold nanorods and fibrinogen through microfluidics: implications for protein adsorption, incorporation and viability of cancer cells. Nanoscale 2021; 13:17807-17821. [PMID: 34668502 DOI: 10.1039/d1nr03179a] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Gold nanoparticles (GNPs) are an attractive nanomaterial for potential applications in therapy and diagnostics due to their capability to direct toward specific sites in the organism. However, when exposed to plasma, GNPs can interact with different biomolecules that form a dynamic nano-bio interface called a "protein corona" (PC). Remarkably, the PC could affect multiple biological processes, such as cell targeting and uptake, cytotoxicity, and nanoparticle (NP) clearance. The interaction of nanomaterials with plasmatic proteins has been widely studied under bulk conditions, however, under dynamic conditions, it has just recently been explored. Thus, to mimic a dynamic natural environment found in arteries and veins, microfluidic devices were used. In this work, gold nanorods (GNRs) were synthesized and conjugated with polyethylene glycol (PEG) to reduce their interaction with plasma proteins and increase their biocompatibility. Then, GNRs were functionalized with folic acid, a targeting ligand typically used to recognize tumor cells. The resulting nanosystem was exposed to fibrinogen (FB) to study the development and biological impact of PC formation through two strategies: bulk and laminar flow conditions. The obtained nanosystems were characterized by absorption spectrophotometry, DLS, laser Doppler microelectrophoresis, neutron activation analysis, circular dichroism spectroscopy and TEM. Finally, cell viability and cellular uptake assays were performed to study the influence of the PC on the cell viability and delivery of nanosystems.
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Affiliation(s)
- Nacaroha Orellana
- Programa Institucional de Fomento a la I+D+I, Universidad Tecnológica Metropolitana, Ignacio Valdivieso 2409, San Joaquín, Chile.
| | - Sujey Palma
- Programa Institucional de Fomento a la I+D+I, Universidad Tecnológica Metropolitana, Ignacio Valdivieso 2409, San Joaquín, Chile.
- Departamento de Química Farmacológica y Toxicológica, Facultad de Ciencias Químicas y Farmacéuticas, Laboratorio de Nanobiotecnología, Universidad de Chile, Santos Dumont 964, Independencia, Chile.
- Advanced Center for Chronic Diseases (ACCDis), Santos Dumont 964, Independencia, Santiago, Chile
| | - Estefania Torres
- Programa Institucional de Fomento a la I+D+I, Universidad Tecnológica Metropolitana, Ignacio Valdivieso 2409, San Joaquín, Chile.
| | - María Luisa Cordero
- Departamento de Física, Facultad de Ciencias Físicas y Matemáticas, Universidad de Chile, Beauchef 850, Santiago, Chile
| | - Valentina Vio
- Departamento de Química Farmacológica y Toxicológica, Facultad de Ciencias Químicas y Farmacéuticas, Laboratorio de Nanobiotecnología, Universidad de Chile, Santos Dumont 964, Independencia, Chile.
- Advanced Center for Chronic Diseases (ACCDis), Santos Dumont 964, Independencia, Santiago, Chile
| | - Juan M Ruso
- Soft Matter and Molecular Biophysics Group, Department of Applied Physics, University of Santiago de Compostela, Santiago de Compostela 15782, Spain
| | - Josué Juárez
- Departamento de Física, Universidad de Sonora, Unidad Centro, Hermosillo, Sonora 83000, Mexico
| | - Antonio Topete
- Laboratorio de Inmunología, Departamento de Fisiología, Centro Universitario de Ciencias de la Salud (CUCS), Universidad de Guadalajara, Guadalajara 44340, Mexico
| | - Eyleen Araya
- Departamento de Ciencias Quimicas, Universidad Andres Bello, Republica 275, 8370146 Santiago, Chile
| | - Rodrigo Vasquez-Contreras
- Departamento de Química Farmacológica y Toxicológica, Facultad de Ciencias Químicas y Farmacéuticas, Laboratorio de Nanobiotecnología, Universidad de Chile, Santos Dumont 964, Independencia, Chile.
- Advanced Center for Chronic Diseases (ACCDis), Santos Dumont 964, Independencia, Santiago, Chile
- Departamento de Ciencias Quimicas, Universidad Andres Bello, Republica 275, 8370146 Santiago, Chile
| | - Marcelo J Kogan
- Departamento de Química Farmacológica y Toxicológica, Facultad de Ciencias Químicas y Farmacéuticas, Laboratorio de Nanobiotecnología, Universidad de Chile, Santos Dumont 964, Independencia, Chile.
- Advanced Center for Chronic Diseases (ACCDis), Santos Dumont 964, Independencia, Santiago, Chile
| | - Natalia Hassan
- Programa Institucional de Fomento a la I+D+I, Universidad Tecnológica Metropolitana, Ignacio Valdivieso 2409, San Joaquín, Chile.
- Advanced Center for Chronic Diseases (ACCDis), Santos Dumont 964, Independencia, Santiago, Chile
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3
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Molina-Martínez LM, Juárez J. Deficit of β-endorphin neurons in the hypothalamus and high expression of MOR in mesolimbic structures are related to high alcohol consumption in outbred rats. Alcohol 2021; 95:1-6. [PMID: 34022405 DOI: 10.1016/j.alcohol.2021.05.002] [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: 08/11/2020] [Revised: 05/03/2021] [Accepted: 05/06/2021] [Indexed: 11/19/2022]
Abstract
Clinical studies have postulated that β-endorphin deficiency generates excessive alcohol consumption, and it has been shown that the reduction of β-endorphin neurons increases alcohol intake in animal models. The β-endorphin produce their rewarding effect when they act mainly on the μ-opioid receptors (MOR) located in mesolimbic structures. Thus, it is possible that individual differences in these components of the endogenous opioid system are related to different levels of alcohol consumption. The present study thus examines the relation between two levels of alcohol consumption and intrinsic characteristics of the components of the opioid system in outbred Wistar rats that were not genetically selected. We analyzed the number of β-endorphin-positive neurons in the arcuate nucleus (ArN) and the expression of μ-opioid receptors (MOR) in regions of the reward system, such as the nucleus accumbens (NAc), amygdala (Amy), and ventral tegmental area (VTA) in outbred rats with low (LC) or high (HC) voluntary alcohol consumption. Findings showed that the HC rats had a lower number of β-endorphin-positive neurons in the hypothalamic ArN and a higher expression of MOR in the NAc and VTA, compared to the LC rats. No changes in the expression of MOR in the Amy were observed between the two groups. Results suggest that intrinsic variability in the number of β-endorphin neurons and in the expression of MOR in the LC and HC rats could explain their different patterns for alcohol intake.
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Affiliation(s)
- L M Molina-Martínez
- Laboratorio de Farmacología y Conducta, Instituto de Neurociencias, CUCBA, Universidad de Guadalajara, Guadalajara, Jalisco, 44130, México
| | - J Juárez
- Laboratorio de Farmacología y Conducta, Instituto de Neurociencias, CUCBA, Universidad de Guadalajara, Guadalajara, Jalisco, 44130, México.
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4
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Del‐Toro‐Sánchez CL, Rodríguez‐Félix F, Cinco‐Moroyoqui FJ, Juárez J, Ruiz‐Cruz S, Wong‐Corral FJ, Borboa‐Flores J, Castro‐Enríquez DD, Barreras‐Urbina CG, Tapia‐Hernández JA. Recovery of phytochemical from three safflower (
Carthamus tinctorius
L.) by‐products: Antioxidant properties, protective effect of human erythrocytes and profile by UPLC‐DAD‐MS. J FOOD PROCESS PRES 2021. [DOI: 10.1111/jfpp.15765] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
| | | | | | - Josué Juárez
- Department of Physics University of Sonora Hermosillo Mexico
| | - Saúl Ruiz‐Cruz
- Department of Research and Posgraduate in Food (DIPA) University of Sonora Hermosillo Mexico
| | | | - Jesús Borboa‐Flores
- Department of Research and Posgraduate in Food (DIPA) University of Sonora Hermosillo Mexico
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5
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Escareño N, Hassan N, Kogan MJ, Juárez J, Topete A, Daneri-Navarro A. Microfluidics-assisted conjugation of chitosan-coated polymeric nanoparticles with antibodies: Significance in drug release, uptake, and cytotoxicity in breast cancer cells. J Colloid Interface Sci 2021; 591:440-450. [PMID: 33631531 DOI: 10.1016/j.jcis.2021.02.031] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [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: 11/14/2020] [Revised: 01/28/2021] [Accepted: 02/07/2021] [Indexed: 12/14/2022]
Abstract
Nanoparticle-based drug delivery systems, in combination with high-affinity disease-specific targeting ligands, provide a sophisticated landscape in cancer theranostics. Due to their high diversity and specificity to target cells, antibodies are extensively used to provide bioactivity to a plethora of nanoparticulate systems. However, controlled and reproducible assembly of nanoparticles (NPs) with these targeting ligands remains a challenge. In this context, determinants such as ligand density and orientation, play a significant role in antibody bioactivity; nevertheless, these factors are complicated to control in traditional bulk labeling methods. Here, we propose a microfluidic-assisted methodology using a polydimethylsiloxane (PDMS) Y-shaped microreactor for the covalent conjugation of Trastuzumab (TZB), a recombinant antibody targeting HER2 (human epidermal growth factor receptor 2), to doxorubicin-loaded PLGA/Chitosan NPs (PLGA/DOX/Ch NPs) using 1-ethyl-3-(3-dimethylaminopropyl)carbodiimide (EDC) and N-hydroxysulfosuccinimide (sNHS) mediated bioconjugation reactions. Our labeling approach led to smaller and less disperse nanoparticle-antibody conjugates providing differential performance when compared to bulk-labeled NPs in terms of drug release kinetics (fitted and analyzed with DDSolver), cell uptake/labeling, and cytotoxic activity on HER2 + breast cancer cells in vitro. By controlling NP-antibody interactions in a laminar regime, we managed to optimize NP labeling with antibodies resulting in ordered coronas with optimal orientation and density for bioactivity, providing a cheap and reproducible, one-step method for labeling NPs with globular targeting moieties.
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Affiliation(s)
- Noé Escareño
- Laboratorio de Inmunología, Departamento de Fisiología, Centro Universitario de Ciencias de la Salud (CUCS), Universidad de Guadalajara, Guadalajara 44340, Mexico
| | - Natalia Hassan
- Programa Institucional de Fomento a la I+D+i, Universidad Tecnológica Metropolitana, San Joaquín 2409, Chile; Advanced Center for Chronic Diseases (ACCDiS), Santos Dumont 964, Independencia, Santiago, Chile.
| | - Marcelo J Kogan
- Departamento de Química Farmacológica y Toxicológica, Facultad de Ciencias Químicas y Farmacéuticas, Universidad de Chile, Santos Dumont 964, Independencia, Santiago, Chile; Advanced Center for Chronic Diseases (ACCDiS), Santos Dumont 964, Independencia, Santiago, Chile.
| | - Josué Juárez
- Departamento de Física, Universidad de Sonora, Unidad Centro, Hermosillo, Sonora 83000, Mexico
| | - Antonio Topete
- Laboratorio de Inmunología, Departamento de Fisiología, Centro Universitario de Ciencias de la Salud (CUCS), Universidad de Guadalajara, Guadalajara 44340, Mexico.
| | - Adrián Daneri-Navarro
- Laboratorio de Inmunología, Departamento de Fisiología, Centro Universitario de Ciencias de la Salud (CUCS), Universidad de Guadalajara, Guadalajara 44340, Mexico.
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6
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Sánchez-Ramírez DR, Domínguez-Ríos R, Juárez J, Valdés M, Hassan N, Quintero-Ramos A, Del Toro-Arreola A, Barbosa S, Taboada P, Topete A, Daneri-Navarro A. Biodegradable photoresponsive nanoparticles for chemo-, photothermal- and photodynamic therapy of ovarian cancer. Mater Sci Eng C Mater Biol Appl 2020; 116:111196. [PMID: 32806317 DOI: 10.1016/j.msec.2020.111196] [Citation(s) in RCA: 19] [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] [Subscribe] [Scholar Register] [Received: 01/28/2020] [Revised: 05/19/2020] [Accepted: 06/16/2020] [Indexed: 12/20/2022]
Abstract
Ovarian cancer (OC) is the deadliest gynecological cancer. Standard treatment of OC is based on cytoreductive surgery followed by chemotherapy with platinum drugs and taxanes; however, innate and acquired drug-resistance is frequently observed followed by a relapse after treatment, thus, more efficient therapeutic approaches are required. Combination therapies involving phototherapies and chemotherapy (the so-called chemophototherapy) may have enhanced efficacy against cancer, by attacking cancer cells through different mechanisms, including DNA-damage and thermally driven cell membrane and cytoskeleton damage. We have designed and synthesized poly(lactic-co-glycolic) nanoparticles (PLGA NPs) containing the chemo-drug carboplatin (CP), and the near infrared (NIR) photosensitizer indocyanine green (ICG). We have evaluated the drug release profile, the photodynamic ROS generation and photothermal capacities of the NPs. Also, the antitumoral efficiency of the NPs was evaluated using the SKOV-3 cell line as an in vitro OC model, observing an enhanced cytotoxic effect when irradiating cells with an 800 nm laser. Evidence here shown supports the potential application of the biodegradable photoresponsive NPs in the clinical stage due to the biocompatibility of the materials used, the spatiotemporal control of the therapy and, also, the less likely development of resistance against the combinatorial therapy.
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Affiliation(s)
- Dante R Sánchez-Ramírez
- Laboratorio de Inmunología, Departamento de Fisiología, Centro Universitario de Ciencias de la Salud (CUCS), Universidad de Guadalajara, Guadalajara 44340, Mexico
| | - Rossina Domínguez-Ríos
- Laboratorio de Inmunología, Departamento de Fisiología, Centro Universitario de Ciencias de la Salud (CUCS), Universidad de Guadalajara, Guadalajara 44340, Mexico
| | - Josué Juárez
- Departamento de Física, Universidad de Sonora, Unidad Centro, Hermosillo, Sonora 83000, Mexico
| | - Miguel Valdés
- Departamento de Física, Universidad de Sonora, Unidad Centro, Hermosillo, Sonora 83000, Mexico
| | - Natalia Hassan
- Programa Institucional de Fomento a la I+D+i, Universidad Tecnológica Metropolitana, San Joaquín 2409, Chile
| | - Antonio Quintero-Ramos
- Laboratorio de Inmunología, Departamento de Fisiología, Centro Universitario de Ciencias de la Salud (CUCS), Universidad de Guadalajara, Guadalajara 44340, Mexico
| | - Alicia Del Toro-Arreola
- Laboratorio de Inmunología, Departamento de Fisiología, Centro Universitario de Ciencias de la Salud (CUCS), Universidad de Guadalajara, Guadalajara 44340, Mexico
| | - Silvia Barbosa
- Departamento de Física de Partículas, Instituto de Investigaciones Sanitarias (IDIS) y Agrupación Estratégica de Materiales, Universidad de Santiago de Compostela, 15782 Santiago de Compostela, Spain
| | - Pablo Taboada
- Departamento de Física de Partículas, Instituto de Investigaciones Sanitarias (IDIS) y Agrupación Estratégica de Materiales, Universidad de Santiago de Compostela, 15782 Santiago de Compostela, Spain
| | - Antonio Topete
- Laboratorio de Inmunología, Departamento de Fisiología, Centro Universitario de Ciencias de la Salud (CUCS), Universidad de Guadalajara, Guadalajara 44340, Mexico.
| | - Adrián Daneri-Navarro
- Laboratorio de Inmunología, Departamento de Fisiología, Centro Universitario de Ciencias de la Salud (CUCS), Universidad de Guadalajara, Guadalajara 44340, Mexico.
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7
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Riveros AL, Eggeling C, Riquelme S, Adura C, López-Iglesias C, Guzmán F, Araya E, Almada M, Juárez J, Valdez MA, Fuentevilla IA, López O, Kogan MJ. Improving Cell Penetration of Gold Nanorods by Using an Amphipathic Arginine Rich Peptide. Int J Nanomedicine 2020; 15:1837-1851. [PMID: 32256063 PMCID: PMC7090188 DOI: 10.2147/ijn.s237820] [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] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2019] [Accepted: 01/29/2020] [Indexed: 12/13/2022] Open
Abstract
Introduction Gold nanorods are highly reactive, have a large surface-to-volume ratio, and can be functionalized with biomolecules. Gold nanorods can absorb infrared electromagnetic radiation, which is subsequently dispersed as local heat. Gold nanoparticles can be used as powerful tools for the diagnosis and therapy of different diseases. To improve the biological barrier permeation of nanoparticles with low cytotoxicity, in this study, we conjugated gold nanorods with cell-penetrating peptides (oligoarginines) and with the amphipathic peptide CLPFFD. Methods We studied the interaction of the functionalized gold nanorods with biological membrane models (liposomes) by dynamic light scattering, transmission electron microscopy and the Langmuir balance. Furthermore, we evaluated the effects on cell viability and permeability with an MTS assay and TEM. Results and Discussion The interaction study by DLS, the Langmuir balance and cryo-TEM support that GNR-Arg7CLPFFD enhances the interactions between GNRs and biological membranes. In addition, cells treated with GNR-Arg7CLPFFD internalized 80% more nanoparticles than cells treated with GNR alone and did not induce cell damage. Conclusion Our results indicate that incorporation of an amphipathic sequence into oligoarginines for the functionalization of gold nanorods enhances biological membrane nanoparticle interactions and nanoparticle cell permeability with respect to nanorods functionalized with oligoarginine. Overall, functionalized gold nanorods with amphipathic arginine rich peptides might be candidates for improving drug delivery by facilitating biological barrier permeation.
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Affiliation(s)
- Ana L Riveros
- Departamento de Química Farmacológica y Toxicológica, Facultad de Ciencias Químicas y Farmacéuticas, Universidad de Chile, Santiago, Chile.,Advanced Center for Chronic Diseases (ACCDiS), Universidad de Chile, Santiago, Chile
| | - Cynthia Eggeling
- Núcleo de Biotecnología Curauma (NBC), Universidad Católica de Valparaíso, Valparaíso, Chile
| | - Sebastián Riquelme
- Departamento de Química Farmacológica y Toxicológica, Facultad de Ciencias Químicas y Farmacéuticas, Universidad de Chile, Santiago, Chile
| | - Carolina Adura
- Departamento de Química Farmacológica y Toxicológica, Facultad de Ciencias Químicas y Farmacéuticas, Universidad de Chile, Santiago, Chile
| | - Carmen López-Iglesias
- Microscopy CORE Lab, The Maastricht Multimodal Molecular Imaging Institute FHML, Maastricht University, Maastrich, Netherlands
| | - Fanny Guzmán
- Núcleo de Biotecnología Curauma (NBC), Universidad Católica de Valparaíso, Valparaíso, Chile
| | - Eyleen Araya
- Departamento de Ciencias Quimicas, Facultad de Ciencias Exactas, Universidad Andres Bello, Santiago, Chile
| | - Mario Almada
- Departamento de Física, Universidad de Sonora, Hermosillo, Sonora, México
| | - Josué Juárez
- Departamento de Física, Universidad de Sonora, Hermosillo, Sonora, México
| | - Miguel A Valdez
- Departamento de Física, Universidad de Sonora, Hermosillo, Sonora, México
| | - Ignacio A Fuentevilla
- Departamento de Química Farmacológica y Toxicológica, Facultad de Ciencias Químicas y Farmacéuticas, Universidad de Chile, Santiago, Chile.,Advanced Center for Chronic Diseases (ACCDiS), Universidad de Chile, Santiago, Chile.,Laboratorio de Investigación en nutrición funcional (LINF), Instituto de Nutrición y Tecnología de los alimentos (INTA), Universidad de Chile, Santiago, Chile
| | - Olga López
- Department Surfactants and Nanobiotechnology, Institute for advanced chemistry of Catalonia, Consejo Superior de Investigaciones Científicas (IQAC-CSIC), Barcelona, Spain
| | - Marcelo J Kogan
- Departamento de Química Farmacológica y Toxicológica, Facultad de Ciencias Químicas y Farmacéuticas, Universidad de Chile, Santiago, Chile.,Advanced Center for Chronic Diseases (ACCDiS), Universidad de Chile, Santiago, Chile
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8
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García-Romo JS, Noguera-Artiaga L, Gálvez-Iriqui AC, Hernández-Zazueta MS, Valenzuela-Cota DF, González-Vega RI, Plascencia-Jatomea M, Burboa-Zazueta MG, Sandoval-Petris E, Robles-Sánchez RM, Juárez J, Hernández-Martínez J, Santacruz-Ortega HDC, Burgos-Hernández A. Antioxidant, antihemolysis, and retinoprotective potentials of bioactive lipidic compounds from wild shrimp (Litopenaeus stylirostris) muscle. CyTA - Journal of Food 2020. [DOI: 10.1080/19476337.2020.1719210] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Joel Said García-Romo
- Departamento de Investigación y Posgrado en Alimentos, Universidad de Sonora, Hermosillo, Mexico
| | - Luis Noguera-Artiaga
- Departamento de Tecnología Agroalimentaria, Universidad Miguel Hernández de Elche, Grupo Calidad y Seguridad Alimentaria, Alicante, Spain
| | | | | | | | | | | | | | - Edgar Sandoval-Petris
- Departamento de Investigaciones Científicas y Tecnológicas, Universidad de Sonora, Hermosillo, Mexico
| | | | - Josué Juárez
- Departamento de Física, Universidad de Sonora, Hermosillo, Mexico
| | | | | | - Armando Burgos-Hernández
- Departamento de Investigación y Posgrado en Alimentos, Universidad de Sonora, Hermosillo, Mexico
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9
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Rodríguez-Félix F, Del-Toro-Sánchez CL, Javier Cinco-Moroyoqui F, Juárez J, Ruiz-Cruz S, López-Ahumada GA, Carvajal-Millan E, Castro-Enríquez DD, Barreras-Urbina CG, Tapia-Hernández JA. Preparation and Characterization of Quercetin-Loaded Zein Nanoparticles by Electrospraying and Study of In Vitro Bioavailability. J Food Sci 2019; 84:2883-2897. [PMID: 31553062 DOI: 10.1111/1750-3841.14803] [Citation(s) in RCA: 46] [Impact Index Per Article: 9.2] [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: 06/06/2019] [Revised: 08/06/2019] [Accepted: 08/12/2019] [Indexed: 12/17/2022]
Abstract
Quercetin is a hydrophobic flavonoid with high antioxidant activity. However, for biological applications, the bioavailability of quercetin is low due to physiological barriers. For this reason, an alternative is the protection of quercetin in matrices of biopolymers as zein. The objective of this work was to prepare and characterize quercetin-loaded zein nanoparticles by electrospraying and its study of in vitro bioavailability. The physicochemical parameters such as viscosity, density, and electrical conductivity of zein solutions showed a dependence of the ethanol concentration. In addition, rheological parameters demonstrated that solutions of zein in aqueous ethanol present Newtonian behavior, rebounding in the formation of nanoparticles by electrospraying, providing spherical, homogeneous, and compact morphologies, mainly at a concentration of 80% (v/v) of ethanol and of 5% (w/v) of zein. The size and shape of quercetin-loaded zein nanoparticles were studied by transmission electron microscopy (TEM), observing that it was entrapped, distributed throughout the nanoparticle of zein. Analysis by Fourier transform-infrared (FT-IR) of zein nanoparticles loaded with quercetin revealed interactions via hydrogen bonds. The efficacy of zein nanoparticles to entrap quercetin was particularly high for all quercetin concentration evaluated in this work (87.9 ± 1.5% to 93.0 ± 2.6%). The in vitro gastrointestinal release of trapped quercetin after 240 min was 79.1%, while that for free quercetin was 99.2%. The in vitro bioavailability was higher for trapped quercetin (5.9%) compared to free quercetin (1.9%), than of gastrointestinal digestion. It is concluded, that the electrospraying technique made possible the obtention of quercitin-loaded zein nanoparticles increasing their bioavailability. PRACTICAL APPLICATION: This type of nanosystems can be used in the food and pharmaceutical industry. Quercetin-loaded zein nanoparticles for its improvement compared to free quercetin can be used to decrease the prevalence of chronic degenerative diseases by increasing of the bioavailability of quercetin in the bloodstream. Other application can be as an antioxidant system in functional foods or oils to increase shelf life.
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Affiliation(s)
- Francisco Rodríguez-Félix
- Dept. of Research and Posgraduate in Food (DIPA), Univ. of Sonora. Blvd. Luis Encinas y Rosales, S/N, Colonia Centro, 83000, Hermosillo, Sonora, Mexico
| | - Carmen Lizette Del-Toro-Sánchez
- Dept. of Research and Posgraduate in Food (DIPA), Univ. of Sonora. Blvd. Luis Encinas y Rosales, S/N, Colonia Centro, 83000, Hermosillo, Sonora, Mexico
| | - Francisco Javier Cinco-Moroyoqui
- Dept. of Research and Posgraduate in Food (DIPA), Univ. of Sonora. Blvd. Luis Encinas y Rosales, S/N, Colonia Centro, 83000, Hermosillo, Sonora, Mexico
| | - Josué Juárez
- Dept. of Physics, Univ. of Sonora, Blvd. Luis Encinas y Rosales, S/N, Colonia Centro, 83000, Hermosillo, Sonora, Mexico
| | - Saúl Ruiz-Cruz
- Dept. of Biotechnology and Food Science, Inst. Technology of Sonora, 5 de febrero #818 sur, Colonia Centro, 85000, Ciudad Obregón, Sonora, Mexico
| | - Guadalupe Amanda López-Ahumada
- Dept. of Research and Posgraduate in Food (DIPA), Univ. of Sonora. Blvd. Luis Encinas y Rosales, S/N, Colonia Centro, 83000, Hermosillo, Sonora, Mexico
| | - Elizabeth Carvajal-Millan
- Research Center for Food and Development A.C., Carretera a La Victoria KM 0.6, 83304, Hermosillo, Sonora, México
| | - Daniela Denisse Castro-Enríquez
- Dept. of Research and Posgraduate in Food (DIPA), Univ. of Sonora. Blvd. Luis Encinas y Rosales, S/N, Colonia Centro, 83000, Hermosillo, Sonora, Mexico
| | - Carlos Gregorio Barreras-Urbina
- Dept. of Research and Posgraduate in Food (DIPA), Univ. of Sonora. Blvd. Luis Encinas y Rosales, S/N, Colonia Centro, 83000, Hermosillo, Sonora, Mexico
| | - José Agustín Tapia-Hernández
- Dept. of Research and Posgraduate in Food (DIPA), Univ. of Sonora. Blvd. Luis Encinas y Rosales, S/N, Colonia Centro, 83000, Hermosillo, Sonora, Mexico
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10
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Molina-Martínez LM, Juárez J. Differential expression of μ-opioid receptors in the nucleus accumbens, amygdala and VTA depends on liking for alcohol, chronic alcohol intake and estradiol treatment. Behav Brain Res 2019; 378:112255. [PMID: 31550484 DOI: 10.1016/j.bbr.2019.112255] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [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: 04/05/2019] [Revised: 09/19/2019] [Accepted: 09/20/2019] [Indexed: 10/25/2022]
Abstract
Affectations of the opioid system have been related to exacerbated alcohol consumption. The objectives of this work were to assess whether a deficit of β-endorphinergic neurons differentially affects alcohol intake in female rats with low (LC) and high alcohol consumption (HC), and to determine changes in the μ-opioid receptors (MOR) related to alcohol consumption and chronic exposure to alcohol in structures of the mesolimbic system. Female wild-type rats were selected according to their baseline alcohol intake levels and then exposed to chronic voluntary alcohol consumption after a single injection of either the vehicle or estradiol valerate (EV) to produce a β-endorphin neuronal deficit. Changes in alcohol consumption and MOR expression levels were assessed in the nucleus accumbens (NAc), amygdala (Amy) and ventral tegmental area (VTA) at 5 and 10 weeks after EV treatment. The LC rats increased alcohol intake from baseline to the initial weeks after EV treatment and this consumption remained stable throughout the studied period. In contrast, alcohol consumption increased steadily over time in the HC rats. The HC vehicle rats had a 38% higher MOR protein expression in the NAc than the LC vehicle rats. In addition, chronic alcohol consumption increased MOR expression in the Amy regardless of consumption level, whereas EV treatment produced a decrease in MOR expression in the VTA in all groups. These results suggest intrinsic differences in MOR expression related to alcohol consumption levels. Also, the EV treatment and chronic exposure to alcohol produced adaptive changes in MOR expression.
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Affiliation(s)
- L M Molina-Martínez
- Laboratorio de Farmacología y Conducta, Instituto de Neurociencias, CUCBA, Universidad de Guadalajara, Mexico
| | - J Juárez
- Laboratorio de Farmacología y Conducta, Instituto de Neurociencias, CUCBA, Universidad de Guadalajara, Mexico.
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11
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Lizama G, Juárez J, AGUILAR A, Chocó A, Lou-Meda R. SAT-203 RENAL ABNORMALITIES IN HIV EXPOSED CHILDREN AND ADOLESCENTS: A GUATEMALAN RETROSPECTIVE COHORT STUDY. Kidney Int Rep 2019. [DOI: 10.1016/j.ekir.2019.05.238] [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: 10/26/2022] Open
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12
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Domínguez-Ríos R, Sánchez-Ramírez DR, Ruiz-Saray K, Oceguera-Basurto PE, Almada M, Juárez J, Zepeda-Moreno A, Del Toro-Arreola A, Topete A, Daneri-Navarro A. Cisplatin-loaded PLGA nanoparticles for HER2 targeted ovarian cancer therapy. Colloids Surf B Biointerfaces 2019; 178:199-207. [PMID: 30856589 DOI: 10.1016/j.colsurfb.2019.03.011] [Citation(s) in RCA: 47] [Impact Index Per Article: 9.4] [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: 12/10/2018] [Revised: 03/02/2019] [Accepted: 03/05/2019] [Indexed: 01/15/2023]
Abstract
The conventional treatment (cytoreduction combined with cisplatin/carboplatin and taxane drugs) of ovarian cancer has a high rate of failure and recurrence despite a favorable initial response. This lack of success is usually attributed to the development of multidrug resistance mechanisms by cancer cells and avoidance of the anti-growth effects of monoclonal targeted therapeutic antibodies. The disease, like other cancers, is characterized by the overexpression of molecular markers, including HER2 receptors. Preclinical and clinical studies with trastuzumab, a HER2-targeted therapeutic antibody, reveal a low improvement of the outcomes of HER2 positive ovarian cancer patients. Therefore, here, we propose a cisplatin-loaded, HER2 targeted poly(lactic-co-glycolic) nanoplatform, a system capable to escape the drug-efflux effect and to take advantage of the overexpressed HER2 receptors, using them as docks for targeted chemotherapy. The NP/trastuzumab ratio was determined after fluorescein labeling of antibodies and quantification of fluorescence in NPs. The system was also characterized in terms of size, zeta potential, drug release kinetics, cytotoxicity and cellular internalization in the epithelial ovarian cancer cell line SKOV-3, and compared with the HER2 negative breast cancer cell line HCC70. Our results show an increased cytotoxicity of NPs as compared to free cisplatin, and moreover, an enhanced internalization and cytotoxicity due to the bionfunctionalization of NPs with the monoclonal antibody.
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Affiliation(s)
- Rossina Domínguez-Ríos
- Laboratorio de Inmunología, Departamento de Fisiología, Centro Universitario de Ciencias de la Salud (CUCS), Universidad de Guadalajara, Guadalajara, 44340, Mexico
| | - Dante R Sánchez-Ramírez
- Laboratorio de Inmunología, Departamento de Fisiología, Centro Universitario de Ciencias de la Salud (CUCS), Universidad de Guadalajara, Guadalajara, 44340, Mexico
| | - Kassandra Ruiz-Saray
- Laboratorio de Inmunología, Departamento de Fisiología, Centro Universitario de Ciencias de la Salud (CUCS), Universidad de Guadalajara, Guadalajara, 44340, Mexico
| | - Paola E Oceguera-Basurto
- Laboratorio de Inmunología, Departamento de Fisiología, Centro Universitario de Ciencias de la Salud (CUCS), Universidad de Guadalajara, Guadalajara, 44340, Mexico
| | - Mario Almada
- Departamento de Ciencias Químico Biológicas y Agropecuarias, Universidad de Sonora, Unidad Regional Sur, Lázaro Cárdenas 100, Colonia Francisco Villa, Navojoa, Sonora C.P. 85880, Mexico
| | - Josué Juárez
- Departamento de Física, Universidad de Sonora, Unidad Centro, Hermosillo, Sonora, 83000, Mexico
| | - Abraham Zepeda-Moreno
- Instituto de Investigación en Cáncer de la Infancia y la Adolescencia (INICIA), Centro Universitario de Ciencias de la Salud (CUCS), Universidad de Guadalajara, Guadalajara, 44340, Mexico
| | - Alicia Del Toro-Arreola
- Laboratorio de Inmunología, Departamento de Fisiología, Centro Universitario de Ciencias de la Salud (CUCS), Universidad de Guadalajara, Guadalajara, 44340, Mexico
| | - Antonio Topete
- Laboratorio de Inmunología, Departamento de Fisiología, Centro Universitario de Ciencias de la Salud (CUCS), Universidad de Guadalajara, Guadalajara, 44340, Mexico.
| | - Adrián Daneri-Navarro
- Laboratorio de Inmunología, Departamento de Fisiología, Centro Universitario de Ciencias de la Salud (CUCS), Universidad de Guadalajara, Guadalajara, 44340, Mexico
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13
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Tapia‐Hernández JA, Del‐Toro‐Sánchez CL, Cinco‐Moroyoqui FJ, Ruiz‐Cruz S, Juárez J, Castro‐Enríquez DD, Barreras‐Urbina CG, López‐Ahumada GA, Rodríguez‐Félix F. Gallic Acid‐Loaded Zein Nanoparticles by Electrospraying Process. J Food Sci 2019; 84:818-831. [DOI: 10.1111/1750-3841.14486] [Citation(s) in RCA: 42] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2018] [Revised: 01/28/2019] [Accepted: 01/30/2019] [Indexed: 12/19/2022]
Affiliation(s)
- José Agustín Tapia‐Hernández
- Dept. of Research and Postgraduate in Food (DIPA)Univ. of Sonora Blvd. Luis Encinas y Rosales, S/N, Colonia Centro 83000 Hermosillo Sonora Mexico
| | - Carmen Lizette Del‐Toro‐Sánchez
- Dept. of Research and Postgraduate in Food (DIPA)Univ. of Sonora Blvd. Luis Encinas y Rosales, S/N, Colonia Centro 83000 Hermosillo Sonora Mexico
| | - Francisco Javier Cinco‐Moroyoqui
- Dept. of Research and Postgraduate in Food (DIPA)Univ. of Sonora Blvd. Luis Encinas y Rosales, S/N, Colonia Centro 83000 Hermosillo Sonora Mexico
| | - Saúl Ruiz‐Cruz
- Dept. of Biotechnology and Food ScienceInst. Technol. of Sonora 5 de febrero #818 sur, Colonia Centro 85000 Ciudad Obregón Sonora Mexico
| | - Josué Juárez
- Dept. of PhysicsUniv. of Sonora Blvd. Luis Encinas y Rosales, S/N, Colonia Centro 83000 Hermosillo Sonora Mexico
| | - Daniela Denisse Castro‐Enríquez
- Dept. of Research and Postgraduate in Food (DIPA)Univ. of Sonora Blvd. Luis Encinas y Rosales, S/N, Colonia Centro 83000 Hermosillo Sonora Mexico
| | - Carlos Gregorio Barreras‐Urbina
- Dept. of Research and Postgraduate in Food (DIPA)Univ. of Sonora Blvd. Luis Encinas y Rosales, S/N, Colonia Centro 83000 Hermosillo Sonora Mexico
| | - Guadalupe Amanda López‐Ahumada
- Dept. of Research and Postgraduate in Food (DIPA)Univ. of Sonora Blvd. Luis Encinas y Rosales, S/N, Colonia Centro 83000 Hermosillo Sonora Mexico
| | - Francisco Rodríguez‐Félix
- Dept. of Research and Postgraduate in Food (DIPA)Univ. of Sonora Blvd. Luis Encinas y Rosales, S/N, Colonia Centro 83000 Hermosillo Sonora Mexico
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14
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Hassan N, Cordero ML, Sierpe R, Almada M, Juárez J, Valdez M, Riveros A, Vargas E, Abou-Hassan A, Ruso JM, Kogan MJ. Peptide functionalized magneto-plasmonic nanoparticles obtained by microfluidics for inhibition of β-amyloid aggregation. J Mater Chem B 2018; 6:5091-5099. [DOI: 10.1039/c8tb00206a] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Synthesis of magneto-plasmonic nanoparticles for the inhibition of β-amyloid fibril formation.
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15
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Almada M, Leal-Martínez BH, Hassan N, Kogan MJ, Burboa MG, Topete A, Valdez MA, Juárez J. Photothermal conversion efficiency and cytotoxic effect of gold nanorods stabilized with chitosan, alginate and poly(vinyl alcohol). Mater Sci Eng C Mater Biol Appl 2017; 77:583-593. [PMID: 28532069 DOI: 10.1016/j.msec.2017.03.218] [Citation(s) in RCA: 45] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/15/2016] [Revised: 02/02/2017] [Accepted: 03/23/2017] [Indexed: 10/19/2022]
Abstract
Gold nanorods (GNR) use has been proposed in medical applications because of their intrinsic photothermal properties. However, the presence of CTAB molecules adsorbed onto the surface of GNRs results in a highly cytotoxic GNR system. In this work we replace the CTAB molecules with a thiolated chitosan. Once chitosan coated GNRs (Chi-SH-GNR) were attained, a film of alginate (Alg-Chi-SH-GNR) or polyvinyl alcohol (PVA-Chi-SH-GNR) was deposited onto the surface of Chi-GNR by a layer-by-layer process. The photothermal conversion efficiency for the GNR systems was determined irradiating the GNRs suspended in aqua media with a CW 808nm diode laser (CNI, China). The cytotoxicity effect and the photothermal cellular damage of GNR systems were evaluated on a breast cancer cell line. Results show that polymer coats did not affect the transduction photothermal efficiency. Values around 50% were obtained for the different coated gold nanorods. The cytotoxicity of coated gold nanorods diminished significantly compared with those GNR stabilized with CTAB. The laser irradiation of cells treated with gold nanorods showed a decrease in their viability compared with the cells treated but no irradiated.
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Affiliation(s)
- M Almada
- Departamento de Física, Universidad de Sonora, Hermosillo, Sonora 83000, Mexico
| | - B H Leal-Martínez
- Departamento de Física, Universidad de Sonora, Hermosillo, Sonora 83000, Mexico
| | - N Hassan
- Programa Institucional de Fomento a la Investigación, Desarrollo e Innovación, Universidad Tecnológica Metropolitana (UTEM), Chile
| | - M J Kogan
- Laboratorio de Nanobiotecnología, Facultad de Ciencias Químicas y Farmacéuticas, Universidad de Chile, Chile; Advanced Center for Chronic Diseases (ACCDiS), Chile
| | - M G Burboa
- Departamento de Investigaciones Científicas y Tecnológicas, Universidad de Sonora, Rosales y Transversal, 83000 Hermosillo, Sonora, Mexico
| | - A Topete
- Departamento de Fisiología, Centro Universitario de Ciencias de la Salud, Universidad de Guadalajara, Sierra Mojada 950, 44340 Guadalajara, Jalisco, Mexico
| | - M A Valdez
- Departamento de Física, Universidad de Sonora, Hermosillo, Sonora 83000, Mexico
| | - J Juárez
- Departamento de Física, Universidad de Sonora, Hermosillo, Sonora 83000, Mexico.
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16
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Aleza P, Cuenca J, Juárez J, Navarro L, Ollitrault P. Inheritance in doubled-diploid clementine and comparative study with SDR unreduced gametes of diploid clementine. Plant Cell Rep 2016; 35:1573-86. [PMID: 27038940 DOI: 10.1007/s00299-016-1972-4] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [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: 11/25/2015] [Accepted: 03/21/2016] [Indexed: 05/23/2023]
Abstract
Tetraploid clementine displays mainly tetrasomic inheritance. Genetic structures of 2n SDR and 2 × gametes from DD clementine are complementary and will guides triploids citrus breeding strategies. Triploid breeding is developed worldwide to create new seedless cultivars. Citrus triploid hybrids can be recovered from 2x × 2x sexual hybridizations as a consequence of the formation of unreduced gametes (2n), or from 4x × 2x interploid hybridizations in which tetraploid parents used are most often doubled-diploid (DD). Here we have analyzed the inheritance in doubled-diploid clementine and compared the genetic structures of gametes of DD clementine with SDR unreduced gametes of diploid clementine. Parental heterozygosity restitution (PHR) with DD parents depends on the rate of preferential chromosome pairing and thus the proportion of disomic versus tetrasomic segregations. Doubled-diploid clementine largely exhibited tetrasomic segregation. However, three linkage groups had intermediate segregation and one had a tendency for disomy. Significant doubled reduction rates (DR) rates were observed in six of the nine LGs. Differences of PHR between 2n SDR and 2x DD gametes were highest in the centromeric region and progressively decreased toward the distal regions where they were not significant. Over all markers, PHR was lower (two-thirds) in SDR 2n gametes than in DD-derived diploid gametes. The two strategies appear complementary in terms of genotypic variability. Interploid 4x × 2x hybridization is potentially more efficient for developing new cultivars that are phenotypically closer to the diploid parent of the DD than sexual hybridization through SDR 2n gametes. Conversely, 2x × 2x triploidisation has the potential to produce novel products with characteristics for market segmentation strategies.
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Affiliation(s)
- P Aleza
- Centro de Protección Vegetal y Biotecnología, Instituto Valenciano de Investigaciones Agrarias (IVIA), Ctra. Moncada-Náquera km 4.5, 46113, Moncada, Valencia, Spain
| | - J Cuenca
- Centro de Protección Vegetal y Biotecnología, Instituto Valenciano de Investigaciones Agrarias (IVIA), Ctra. Moncada-Náquera km 4.5, 46113, Moncada, Valencia, Spain
| | - J Juárez
- Centro de Protección Vegetal y Biotecnología, Instituto Valenciano de Investigaciones Agrarias (IVIA), Ctra. Moncada-Náquera km 4.5, 46113, Moncada, Valencia, Spain
| | - L Navarro
- Centro de Protección Vegetal y Biotecnología, Instituto Valenciano de Investigaciones Agrarias (IVIA), Ctra. Moncada-Náquera km 4.5, 46113, Moncada, Valencia, Spain.
| | - P Ollitrault
- Centro de Protección Vegetal y Biotecnología, Instituto Valenciano de Investigaciones Agrarias (IVIA), Ctra. Moncada-Náquera km 4.5, 46113, Moncada, Valencia, Spain.
- UMR AGAP, Centre de coopération Internationale en Recherche Agronomique pour le Développement (CIRAD), Station de Roujol, 97170, Petit-Bourg, Guadeloupe.
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17
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Ruiz ED, Almada M, Burboa MG, Taboada P, Mosquera V, Valdez MA, Juárez J. Oligomers, protofibrils and amyloid fibrils from recombinant human lysozyme (rHL): fibrillation process and cytotoxicity evaluation for ARPE-19 cell line. Colloids Surf B Biointerfaces 2014; 126:335-43. [PMID: 25618793 DOI: 10.1016/j.colsurfb.2014.12.008] [Citation(s) in RCA: 10] [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: 12/13/2013] [Revised: 10/18/2014] [Accepted: 12/04/2014] [Indexed: 10/24/2022]
Abstract
Amyloid-associated diseases, such Alzheimer's, Huntington's, Parkinson's, and type II diabetes, are related to protein misfolding and aggregation. Herein, the time evolution of scattered light intensity, hydrophobic properties, and conformational changes during fibrillation processes of rHL solutions at 55 °C and pH 2.0 were used to monitor the aggregation process of recombinant human lysozyme (rHL). Dynamic light scattering (DLS), thioflavin T (ThT) fluorescence, and surface tension (ST) at the air-water interface were used to analyze the hydrophobic properties of pre-amyloid aggregates involved in the fibrillation process of rHL to find a correlation between the hydrophobic character of oligomers, protofibrils and amyloid aggregates with the gain in cross-β-sheet structure, depending on the increase in the incubation periods. The ability of the different aggregates of rHL isolated during the fibrillation process to be adsorbed at the air-water interface can provide important information about the hydrophobic properties of the protein, which can be related to changes in the secondary structure of rHL, resulting in cytotoxic or non-cytotoxic species. Thus, we evaluated the cytotoxic effect of oligomers, protofibrils and amyloid fibrils on the cell line ARPE-19 using the MTT reduction test. The more cytotoxic protein species arose after a 600-min incubation time, suggesting that the hydrophobic character of pre-amyloid fibrils, in addition to the high prevalence of the cross-β-sheet conformation, can become toxic for the cell line ARPE-19.
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Affiliation(s)
- Eva D Ruiz
- Departamento de Física, Universidad de Sonora, Rosales y Transversal, 83000 Hermosillo, Sonora, Mexico
| | - Mario Almada
- Departamento de Física, Universidad de Sonora, Rosales y Transversal, 83000 Hermosillo, Sonora, Mexico
| | - María G Burboa
- Departamento de Investigaciones Científicas y Tecnológicas, Universidad de Sonora, Rosales y Transversal, 83000 Hermosillo, Sonora, Mexico
| | - Pablo Taboada
- Departamento de Física de la Materia Condensada, Facultad de Física, Universidad de Santiago de Compostela, Spain
| | - Víctor Mosquera
- Departamento de Física de la Materia Condensada, Facultad de Física, Universidad de Santiago de Compostela, Spain
| | - Miguel A Valdez
- Departamento de Física, Universidad de Sonora, Rosales y Transversal, 83000 Hermosillo, Sonora, Mexico
| | - Josué Juárez
- Departamento de Física, Universidad de Sonora, Rosales y Transversal, 83000 Hermosillo, Sonora, Mexico.
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18
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Cambón A, Figueroa-Ochoa E, Juárez J, Villar-Álvarez E, Pardo A, Barbosa S, Soltero JFA, Taboada P, Mosquera V. Complex Self-Assembly of Reverse Poly(butylene oxide)-Poly(ethylene oxide)-Poly(butylene oxide) Triblock Copolymers with Long Hydrophobic and Extremely Lengthy Hydrophilic Blocks. J Phys Chem B 2014; 118:5258-69. [DOI: 10.1021/jp500426k] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Adriana Cambón
- Departamento
de Física de la Materia Condensada, Grupo de Física de Coloides y Polímeros, 15782-Santiago
de Compostela, Spain
| | - Edgar Figueroa-Ochoa
- Laboratorio de
Reología, Departamento de Ingeniería Química, CUCEI, Universidad de Guadalajara, Bolv. M. García Barragán 44430, Jalisco, México
| | - Josué Juárez
- Departamento
de Física, Universidad de Sonora, Rosales y Transversal, 83000 Hermosillo, Sonora, México
| | - Eva Villar-Álvarez
- Departamento
de Física de la Materia Condensada, Grupo de Física de Coloides y Polímeros, 15782-Santiago
de Compostela, Spain
| | - Alberto Pardo
- Departamento
de Física de la Materia Condensada, Grupo de Física de Coloides y Polímeros, 15782-Santiago
de Compostela, Spain
| | - Silvia Barbosa
- Departamento
de Física de la Materia Condensada, Grupo de Física de Coloides y Polímeros, 15782-Santiago
de Compostela, Spain
| | - J. F. Armando Soltero
- Laboratorio de
Reología, Departamento de Ingeniería Química, CUCEI, Universidad de Guadalajara, Bolv. M. García Barragán 44430, Jalisco, México
| | - Pablo Taboada
- Departamento
de Física de la Materia Condensada, Grupo de Física de Coloides y Polímeros, 15782-Santiago
de Compostela, Spain
| | - Víctor Mosquera
- Departamento
de Física de la Materia Condensada, Grupo de Física de Coloides y Polímeros, 15782-Santiago
de Compostela, Spain
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Almada M, Burboa M, Robles E, Gutiérrez L, Valdés M, Juárez J. Interaction and Cytotoxic Effects of Hydrophobized Chitosan Nanoparticles on MDA-MB-231, HeLa and Arpe-19 Cell Lines. Curr Top Med Chem 2014; 14:692-701. [DOI: 10.2174/1568026614666140118214802] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2013] [Revised: 10/30/2013] [Accepted: 11/02/2013] [Indexed: 11/22/2022]
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Soto C, Raya L, Juárez J, Pérez J, González I. Effect of Silymarin in Pdx-1 expression and the proliferation of pancreatic β-cells in a pancreatectomy model. Phytomedicine 2014; 21:233-9. [PMID: 24176839 DOI: 10.1016/j.phymed.2013.09.008] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [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: 04/19/2013] [Revised: 07/27/2013] [Accepted: 09/19/2013] [Indexed: 06/02/2023]
Abstract
In type 1 Diabetes Mellitus (DM) there is a destruction of pancreatic β-cells (80-90%) at the time of detection, in DM type 2 these cells are decreased significantly. The Pdx1 transcription factor plays a central role in pancreatic development and in insulin gene expression. Previously, we have demonstrated that Silymarin recovers the normal morphology and endocrine function of damaged pancreatic tissue in alloxan induced diabetic rats. The aim of this study was to analyze the effect of Silymarin in Pdx1 gene expression and its repercussion on insulin gene expression and β-cell proliferation. 72 Wistar rats were partially pancreatectomized (60%) and divided into 12 groups. Six groups were treated daily with Silymarin (200mg/kg p.o.) for 3, 7, 14, 21, 42 and 63 day periods. Also, an unpancreatectomized control group was performed. At each time interval three animals from each group were administered BrdU 18 h before the sacrifice. Insulin and Pdx-1 gene expression were assessed by RT-PCR assay in total pancreatic RNA. β-Cell proliferation was determined by immunoperoxidase assay. In contrast to the animals that were only pancreatectomized, the Silymarin treatment induced an increase in both Pdx1 and insulin gene expression as well as β-cell proliferation in pancreatic tissue (control=2.6±0.28%; untreated=14.25±0.56%; treated=39.08±4.62%). Consequently, serum insulin levels rose (control=1.01±0.02 ng/ml; untreated=1.18±0.42 ng/ml; treated=4.58±0.58 ng/ml) and serum glucose levels decreased in these animals (control=6.2±0.01 mM; untreated=9.02±0.41 mM; treated=6.41±0.32 mM). These results suggest that Silymarin may induce the proliferation of insulin-producing cells.
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MESH Headings
- Animals
- Blood Glucose/metabolism
- Cell Differentiation
- Cell Proliferation
- Diabetes Mellitus, Experimental/drug therapy
- Diabetes Mellitus, Experimental/genetics
- Diabetes Mellitus, Experimental/metabolism
- Diabetes Mellitus, Experimental/pathology
- Diabetes Mellitus, Type 1/drug therapy
- Diabetes Mellitus, Type 1/genetics
- Diabetes Mellitus, Type 1/metabolism
- Diabetes Mellitus, Type 1/pathology
- Diabetes Mellitus, Type 2/drug therapy
- Diabetes Mellitus, Type 2/genetics
- Diabetes Mellitus, Type 2/metabolism
- Diabetes Mellitus, Type 2/pathology
- Disease Models, Animal
- Gene Expression/drug effects
- Homeodomain Proteins/genetics
- Homeodomain Proteins/metabolism
- Insulin/blood
- Insulin/genetics
- Insulin/metabolism
- Insulin-Secreting Cells/cytology
- Insulin-Secreting Cells/drug effects
- Insulin-Secreting Cells/metabolism
- Male
- Silybum marianum/chemistry
- Pancreatectomy
- Phytotherapy
- Plant Extracts/pharmacology
- Plant Extracts/therapeutic use
- RNA/metabolism
- Rats
- Rats, Wistar
- Silymarin/pharmacology
- Silymarin/therapeutic use
- Trans-Activators/genetics
- Trans-Activators/metabolism
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Affiliation(s)
- C Soto
- Departamento de Sistemas Biológicos, Universidad Autónoma Metropolitana, Mexico.
| | - L Raya
- Facultad de Medicina, Universidad Nacional Autónoma de México, México, D.F., Mexico
| | - J Juárez
- Departamento de Sistemas Biológicos, Universidad Autónoma Metropolitana, Mexico
| | - J Pérez
- Departamento de Sistemas Biológicos, Universidad Autónoma Metropolitana, Mexico
| | - I González
- Departamento de Sistemas Biológicos, Universidad Autónoma Metropolitana, Mexico
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21
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Robles E, Juárez J, Burboa MG, Gutiérrez LE, Taboada P, Mosquera V, Valdez MA. Properties of insulin-chitosan complexes obtained by an alkylation reaction on chitosan. J Appl Polym Sci 2013. [DOI: 10.1002/app.39999] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Emmanuel Robles
- Departamento de Investigación en Polímeros y Materiales; Universidad de Sonora, Rosales y Transversal; Hermosillo 83000 Sonora México
| | - Josué Juárez
- Departamento de Física; Universidad de Sonora, Rosales y Transversal; Hermosillo 83000 Sonora México
| | - María. G. Burboa
- Departamento de Investigaciones Científicas y Tecnológicas; Universidad de Sonora, Rosales y Transversal; Hermosillo 83000 Sonora México
| | - Luis E. Gutiérrez
- Departamento de Investigaciones Científicas y Tecnológicas; Universidad de Sonora, Rosales y Transversal; Hermosillo 83000 Sonora México
| | - Pablo Taboada
- Laboratorio de Física de Coloides y Polímeros, Grupo de Sistemas Complejos, Departamento de Física de la Materia Condensada, Facultad de Física; Universidad de Santiago de Compostela; Santiago de Compostela 15782 Spain
| | - Víctor Mosquera
- Laboratorio de Física de Coloides y Polímeros, Grupo de Sistemas Complejos, Departamento de Física de la Materia Condensada, Facultad de Física; Universidad de Santiago de Compostela; Santiago de Compostela 15782 Spain
| | - Miguel A. Valdez
- Departamento de Física; Universidad de Sonora, Rosales y Transversal; Hermosillo 83000 Sonora México
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22
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Nakagawa J, Juárez J, Nakatsuji K, Akiyama T, Hernandez G, Macal R, Flores C, Ortiz M, Marroquín L, Bamba T, Wakai S. Geographical characterization of the triatomine infestations in north–central Guatemala. Annals of Tropical Medicine & Parasitology 2013; 99:307-15. [PMID: 15829138 DOI: 10.1179/136485905x29684] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
In an entomological study in 2002, the degree of domestic and peridomestic infestation with triatomine bugs and the geographical distribution of such infestations were investigated in north-central Guatemala. The survey team searched for triatomines in houses constructed with mud walls or thatched roofs, in villages suspected of being infested. The level of infestation observed was lower than that seen in the same area and in eastern Guatemala, in a preliminary survey, 3 years earlier. Most of the infestations detected were of Triatoma dimidiata but even this species was found in <7% of the houses investigated. Infestations with Rhodnius prolixus or other potential vectors of Trypanosoma cruzi were much rarer. The generally low levels of infestation make the elimination of R. prolixus and the reduction of the domestic population of Tri. dimidiata feasible in the study area. The southern part of the study area had higher levels of domestic infestation and colonization than the north, and peridomestic infestation was highest in the south-west. Given such geographical variation in the pattern of infestation, it would seem wise to stratify the study region into areas of high, moderate and low-risk of human-triatomine contact, so that appropriate vector-control strategies can be targeted at the worst-affected areas. Regular entomological surveillance, ideally with community participation, is recommended. Analysis of the relationship between the geographical patterns of infestation and factors such as vegetation, altitude and vector migration would be useful.
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Affiliation(s)
- J Nakagawa
- Chagas Disease Vector Control Project, Japan International Cooperation Agency, Apartado Postal 1752, Tegucigalpa, Honduras.
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23
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Aleza P, Juárez J, Cuenca J, Ollitrault P, Navarro L. Extensive citrus triploid hybrid production by 2x×4x sexual hybridizations and parent-effect on the length of the juvenile phase. Plant Cell Rep 2012; 31:1723-35. [PMID: 22614256 DOI: 10.1007/s00299-012-1286-0] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/24/2012] [Revised: 04/26/2012] [Accepted: 05/04/2012] [Indexed: 05/23/2023]
Abstract
UNLABELLED The citrus fresh market demands the production of seedless citrus fruits, as seedy fruits are not accepted by consumers. The recovery of triploid plants has proven to be the most promising approach to achieve this goal, since triploids have very low fertility, are generally seedless and do not induce seeds in other cultivars by cross pollination. Triploid plants can be recovered by 2x×4x sexual hybridization. In this work, we present an effective methodology to recover triploid plants from 2x×4x hybridizations based on in vitro embryo rescue, ploidy level analysis by flow cytometry and genetic origin of triploid plants. The pollen viability of diploid and tetraploid citrus genotypes was analyzed by comparing the pollen germination rate in vitro. The pollen viability of tetraploid (doubled-diploid) genotypes is generally reduced but sufficient for successful pollination. Triploid embryos were identified in normal and undeveloped seeds that did not germinate under greenhouse conditions. The influence of parents and environmental conditions on obtaining triploid plants was analyzed and a strong interaction was noted between the parents and environmental conditions. The parental effect on the length of the juvenile phase was also demonstrated through observations of a large number of progeny over the last 15 years. The juvenile phase length of the triploid hybrids obtained with 'Fortune' mandarin as female parent and tetraploid 'Orlando' tangelo as male parent was shorter than the juvenile phase obtained with a clementine as female parent and tetraploids of 'Nova', 'W. Leaf' and 'Pineapple' male parents. KEY MESSAGE Effective methodology to recover citrus triploid plants from 2x×4x sexual hybridizations and the parental effect on the length of the juvenile phase.
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Affiliation(s)
- P Aleza
- Centro de Protección Vegetal y Biotecnología, Instituto Valenciano de Investigaciones Agrarias (IVIA), Ctra. Moncada-Náquera km 4.5, 46113, Moncada, Valencia, Spain
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24
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Goy-López S, Juárez J, Alatorre-Meda M, Casals E, Puntes VF, Taboada P, Mosquera V. Physicochemical characteristics of protein-NP bioconjugates: the role of particle curvature and solution conditions on human serum albumin conformation and fibrillogenesis inhibition. Langmuir 2012; 28:9113-9126. [PMID: 22439664 DOI: 10.1021/la300402w] [Citation(s) in RCA: 147] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
Gold nanoparticles (Au NPs) from 5 to 100 nm in size synthesized with HAuCl(4) and sodium citrate were complexed with the plasma protein human serum albumin (HSA). Size, surface charge, and surface plasmon bands of the Au NPs are largely modified by the formation of a protein corona via electrostatic interactions and hydrogen bonding as revealed by thermodynamic data. Negative values of the entropy of binding suggested a restriction in the biomolecule mobility upon adsorption. The structure of the adsorbed protein molecules is slightly affected by the interaction with the metal surface, but this effect is enhanced as the NP curvature decreases. Also, it is observed that the protein molecules adsorbed onto the NP surface are more resistant to complete thermal denaturation than free protein ones as deduced from the increases in the melting temperature of the adsorbed protein. Differences in the conformations of the adsorbed protein molecules onto small (<40 nm) and large NPs were observed on the basis of ζ-potential data and FTIR spectroscopy, also suggesting a better resistance of adsorbed protein molecules to thermal denaturing conditions. We think this enhanced protein stability is responsible for a reduced formation of HSA amyloid-like fibrils in the presence of small Au NPs under HSA fibrillation conditions.
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Affiliation(s)
- Sonia Goy-López
- Grupo de Física de Coloides y Polímeros, Departamento de Física de la Materia Condensada, Facultad de Física, Campus Vida, 15782, Universidad de Santiago de Compostela, Spain
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25
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Cambón A, Alatorre-Meda M, Juárez J, Topete A, Mistry D, Attwood D, Barbosa S, Taboada P, Mosquera V. Micellisation of triblock copolymers of ethylene oxide and 1,2-butylene oxide: Effect of B-block length. J Colloid Interface Sci 2011; 361:154-8. [DOI: 10.1016/j.jcis.2011.05.059] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2011] [Revised: 05/16/2011] [Accepted: 05/17/2011] [Indexed: 01/04/2023]
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26
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Juárez J, Cambón A, Topete A, Taboada P, Mosquera V. One‐Dimensional Magnetic Nanowires Obtained by Protein Fibril Biotemplating. Chemistry 2011; 17:7366-73. [DOI: 10.1002/chem.201003679] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2010] [Revised: 03/07/2011] [Indexed: 11/07/2022]
Affiliation(s)
- Josué Juárez
- Grupo de Física de Coloides y Polímeros, Departamento de Física de la Materia Condensada, Facultad de Física, Universidad de Santiago de Compostela, 15782 Santiago de Compostela (Spain), Fax: (+34) 881814112
| | - Adriana Cambón
- Grupo de Física de Coloides y Polímeros, Departamento de Física de la Materia Condensada, Facultad de Física, Universidad de Santiago de Compostela, 15782 Santiago de Compostela (Spain), Fax: (+34) 881814112
| | - Antonio Topete
- Grupo de Física de Coloides y Polímeros, Departamento de Física de la Materia Condensada, Facultad de Física, Universidad de Santiago de Compostela, 15782 Santiago de Compostela (Spain), Fax: (+34) 881814112
| | - Pablo Taboada
- Grupo de Física de Coloides y Polímeros, Departamento de Física de la Materia Condensada, Facultad de Física, Universidad de Santiago de Compostela, 15782 Santiago de Compostela (Spain), Fax: (+34) 881814112
| | - Víctor Mosquera
- Grupo de Física de Coloides y Polímeros, Departamento de Física de la Materia Condensada, Facultad de Física, Universidad de Santiago de Compostela, 15782 Santiago de Compostela (Spain), Fax: (+34) 881814112
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27
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Aleza P, Juárez J, Cuenca J, Ollitrault P, Navarro L. Recovery of citrus triploid hybrids by embryo rescue and flow cytometry from 2x x 2x sexual hybridisation and its application to extensive breeding programs. Plant Cell Rep 2010; 29:1023-34. [PMID: 20607244 DOI: 10.1007/s00299-010-0888-7] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/22/2010] [Revised: 05/27/2010] [Accepted: 06/14/2010] [Indexed: 05/23/2023]
Abstract
Seedlessness is one of the most important characteristics for mandarins for the fresh-fruit market and mandarin triploid hybrids have this trait. Citrus triploid plants can be recovered by 2x x 2x sexual hybridisations as a consequence of the formation of unreduced gametes at low frequency. Triploid embryos are found in small seeds that do not germinate under greenhouse conditions. Extensive breeding programs based on this type of hybridisation require very effective methodologies for embryo rescue and ploidy evaluation. In this work, we describe an effective methodology to recover triploid hybrids from 2x x 2x hybridisations based on in vitro embryo rescue and ploidy level determination by means of flow cytometry. The influence of parents and environmental conditions on obtaining triploid hybrids has been analysed. The strongest effect was associated with the genotype of the female parent while a strong interaction was found between the male parent genotype and environmental conditions. The effect of the female parent genotype on the length of the juvenile phase was also demonstrated by observing a large number of progenies over the last 10 years. The methodology described here has enabled us to obtain over 4,000 triploid hybrids so far, of which 13 have been protected in the European Union and two are being extensively planted by citrus growers to establish new commercial plots. These triploid hybrids have been analysed with simple sequence repeats markers to differentiate all the new triploid varieties and their parents, and thus molecular identification will help defend plant breeders' rights.
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Affiliation(s)
- P Aleza
- Centro de Protección Vegetal y Biotecnología, Instituto Valenciano de Investigaciones Agrarias, Ctra. Moncada-Náquera km 4.5, 46113, Moncada, Valencia, Spain
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28
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Goy-López S, Juárez J, Cambón A, Botana J, Pereiro M, Baldomir D, Taboada P, Mosquera V. Block copolymer-regulated synthesis of gold nanocrystals with sharp tips and edges. ACTA ACUST UNITED AC 2010. [DOI: 10.1039/c0jm00731e] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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Juárez J, López SG, Cambón A, Taboada P, Mosquera V. Influence of electrostatic interactions on the fibrillation process of human serum albumin. J Phys Chem B 2009; 113:10521-9. [PMID: 19572666 DOI: 10.1021/jp902224d] [Citation(s) in RCA: 96] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The fibrillation propensity of the multidomain protein human serum albumin (HSA) has been analyzed under physiological and acidic conditions at room and elevated temperatures with varying ionic strengths by different spectroscopic techniques. The kinetics of fibril formation under the different solution conditions and the structures of resulting fibrillar aggregates were also determined. In this way, we have observed that fibril formation is largely affected by electrostatic shielding: at physiological pH, fibrillation is progressively more efficient and faster in the presence of up to 50 mM NaCl; meanwhile, at larger salt concentrations, excessive shielding and further enhancement of the solution hydrophobicity might involve a change in the energy landscape of the aggregation process, which makes the fibrillation process difficult. In contrast, under acidic conditions, a continuous progressive enhancement of HSA fibrillation is observed as the electrolyte concentration in solution increases. Both the distinct ionization and initial structural states of the protein before incubation may be the origin of this behavior. CD, FT-IR, and tryptophan fluorescence spectra seem to confirm this picture by monitoring the structural changes in both protein tertiary and secondary structures along the fibrillation process. On the other hand, the fibrillation of HSA does not show a lag phase except at pH 3.0 in the absence of added salt. Finally, differences in the structure of the intermediates and resulting fibrils under the different conditions are also elucidated by TEM and FT-IR.
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Affiliation(s)
- Josué Juárez
- Grupo de Física de Coloides y Polímeros, Departamento de Física de la Materia Condensada, Facultad de Física, Universidad de Santiago de Compostela, E-15782, Santiago de Compostela, Spain
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30
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Goy-López S, Taboada P, Cambón A, Juárez J, Alvarez-Lorenzo C, Concheiro A, Mosquera V. Modulation of Size and Shape of Au Nanoparticles Using Amino-X-Shaped Poly(ethylene oxide)−Poly(propylene oxide) Block Copolymers. J Phys Chem B 2009; 114:66-76. [DOI: 10.1021/jp908569z] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Sonia Goy-López
- Grupo de Física de Coloides y Polímeros, Departamento de Física de la Materia Condensada, Facultad de Física, and Departamento de Farmacia y Tecnología Farmacéutica, Facultad de Farmacia, Universidad de Santiago de Compostela, E-15782, Santiago de Compostela, Spain
| | - Pablo Taboada
- Grupo de Física de Coloides y Polímeros, Departamento de Física de la Materia Condensada, Facultad de Física, and Departamento de Farmacia y Tecnología Farmacéutica, Facultad de Farmacia, Universidad de Santiago de Compostela, E-15782, Santiago de Compostela, Spain
| | - Adriana Cambón
- Grupo de Física de Coloides y Polímeros, Departamento de Física de la Materia Condensada, Facultad de Física, and Departamento de Farmacia y Tecnología Farmacéutica, Facultad de Farmacia, Universidad de Santiago de Compostela, E-15782, Santiago de Compostela, Spain
| | - Josué Juárez
- Grupo de Física de Coloides y Polímeros, Departamento de Física de la Materia Condensada, Facultad de Física, and Departamento de Farmacia y Tecnología Farmacéutica, Facultad de Farmacia, Universidad de Santiago de Compostela, E-15782, Santiago de Compostela, Spain
| | - Carmen Alvarez-Lorenzo
- Grupo de Física de Coloides y Polímeros, Departamento de Física de la Materia Condensada, Facultad de Física, and Departamento de Farmacia y Tecnología Farmacéutica, Facultad de Farmacia, Universidad de Santiago de Compostela, E-15782, Santiago de Compostela, Spain
| | - Angel Concheiro
- Grupo de Física de Coloides y Polímeros, Departamento de Física de la Materia Condensada, Facultad de Física, and Departamento de Farmacia y Tecnología Farmacéutica, Facultad de Farmacia, Universidad de Santiago de Compostela, E-15782, Santiago de Compostela, Spain
| | - Víctor Mosquera
- Grupo de Física de Coloides y Polímeros, Departamento de Física de la Materia Condensada, Facultad de Física, and Departamento de Farmacia y Tecnología Farmacéutica, Facultad de Farmacia, Universidad de Santiago de Compostela, E-15782, Santiago de Compostela, Spain
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31
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Juárez J, Taboada P, Goy-López S, Cambón A, Madec MB, Yeates SG, Mosquera V. Additional supra-self-assembly of human serum albumin under amyloid-like-forming solution conditions. J Phys Chem B 2009; 113:12391-9. [PMID: 19681594 DOI: 10.1021/jp904167e] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Protein aggregation has a multitude of consequences ranging from affecting protein expression to its implication in different diseases. Of recent interest is the specific form of aggregation leading to the formation of amyloid fibrils, structures associated with diseases such as Alzheimer's disease. These fibrils can further associate in other more complex structures such as fibrillar gels, plaques, or spherulitic structures. In the present work, we describe the physical and structural properties of additional supraself-assembled structures of human serum albumin under solution conditions in which amyloid-like fibrils are formed. We have detected the formation of ordered aggregates of amyloid fibrils, i.e., spherulites which possess a radial arrangement of the fibrils around a disorganized protein core and sizes of several micrometers by means of polarized optical microscopy, laser confocal microscopy, and transmission electron microscopy. These spherulites are detected both in solution and embedded in an isotropic matrix of fibrillar gels. In this regard, we have also noted the formation of protein gels when the protein concentration and/or ionic strength exceds a threshold value (the gelation point) as observed by rheometry. Fibrillar gels are formed through intermolecular nonspecific association of amyloid fibrils at a pH far away from the isolectric point of the protein where protein molecules seem to display a "solid-like" behavior due to the existence of non-DLVO (Derjaguin-Landau-Verwey-Overbeck) intermolecular repulsive forces. As the solution ionic strength increases, a coarsening of this type of gel is observed by environmental scanning microscopy. In contrast, at pH close to the protein isoelectric point, particulate gels are formed due to a faster aggregation process, which does not allow substantial structural reorganization to enable the formation of ordered structures. This behavior also additionally corroborates that the existence of particulates might also be a generic property of all polypeptide chains as amyloid fibril formation under suitable conditions.
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Affiliation(s)
- Josué Juárez
- Grupo de Fisica de Coloides y Polimeros, Departamento de Fisica de la Materia Condensada, Facultad de Fisica, Universidad de Santiago de Compostela, E-15782 Santiago de Compostela, Spain
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32
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Hashemian SMB, Serra P, Barbosa CJ, Juárez J, Aleza P, Corvera JM, Lluch A, Pina JA, Duran-Vila N. Effect of a Field-Source Mixture of Citrus Viroids on the Performance of 'Nules' Clementine and 'Navelina' Sweet Orange Trees Grafted on Carrizo Citrange. Plant Dis 2009; 93:699-707. [PMID: 30764383 DOI: 10.1094/pdis-93-7-0699] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
A field-source mixture of citrus viroids was characterized and shown to contain Citrus exocortis viroid (CEVd), Hop stunt viroid (HSVd), Citrus bent leaf viroid (CBLVd), and Citrus dwarfing viroid (CDVd). Sequencing results showed that: (i) CEVd contained the PL and PR characteristic of class A variants; (ii) HSVd was a noncachexia variant; (iii) CBLVd was related to CVd-Ia variants; (iv) CDVd was a mixture of two types (CVd-IIIa and CVd-IIIb) of variants. The presence of the same type of variants in inoculated clementine (Citrus clementina 'Nules') and sweet orange (C. sinensis 'Navelina') trees on Carrizo citrange (Poncirus trifoliata × C. sinensis) rootstocks was confirmed. The effect of infection was determined by assessing the performance of infected and noninfected trees growing in the field. Infection resulted in small trees with reduced canopy, yielding a reduced crop. Fruit characteristics were also affected: (i) clementine and sweet orange fruits from infected trees were larger than those from noninfected trees; (ii) clementine fruits from infected trees differed in shape from those of noninfected trees; (iii) sweet orange fruits from infected trees had maturity indexes and juice contents higher than those from noninfected trees; (iv) in both species, the density of the juice, the amount of soluble solids, and the acidity of the fruits from infected trees were lower than those of fruits from noninfected trees. Infected trees had a poorly developed root system with fibrous roots containing fewer amyloplasts than noninfected trees. The results of an in vitro assay on the induction and development of roots in cultured explants are discussed.
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Affiliation(s)
- S M Bani Hashemian
- Departamento de Protección Vegetal y Biotecnología, Instituto Valenciano de Investigaciones Agrarias, Apartado Oficial, 46113-Moncada, Valencia, Spain
| | - P Serra
- Departamento de Protección Vegetal y Biotecnología, Instituto Valenciano de Investigaciones Agrarias, Apartado Oficial, 46113-Moncada, Valencia, Spain
| | - C J Barbosa
- Departamento de Protección Vegetal y Biotecnología, Instituto Valenciano de Investigaciones Agrarias, Apartado Oficial, 46113-Moncada, Valencia, Spain
| | - J Juárez
- Departamento de Protección Vegetal y Biotecnología, Instituto Valenciano de Investigaciones Agrarias, Apartado Oficial, 46113-Moncada, Valencia, Spain
| | - P Aleza
- Departamento de Protección Vegetal y Biotecnología, Instituto Valenciano de Investigaciones Agrarias, Apartado Oficial, 46113-Moncada, Valencia, Spain
| | - J M Corvera
- Departamento de Protección Vegetal y Biotecnología, Instituto Valenciano de Investigaciones Agrarias, Apartado Oficial, 46113-Moncada, Valencia, Spain
| | - A Lluch
- Departamento de Protección Vegetal y Biotecnología, Instituto Valenciano de Investigaciones Agrarias, Apartado Oficial, 46113-Moncada, Valencia, Spain
| | - J A Pina
- Servicio de Inspección Fitosanitaria, Valencia, Spain
| | - N Duran-Vila
- Departamento de Protección Vegetal y Biotecnología, Instituto Valenciano de Investigationes Agrarias, Apartado Oficial, 46113-Moncada, Valencia, Spain
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Juárez J, Posadas R, Medina A, Caracas N, Cardoso G, Mendoza E, Goycochea M, Silveira L, Posadas C. Abstract: P1436 EFFECT OF PIOGLITAZONE ON HDL, INSULIN AND ADIPONECTIN CONCENTRATIONS IN YOUNG WOMEN WITH UNCOMPLICATED SYSTEMIC LUPUS ERYTHEMATOSUS. ATHEROSCLEROSIS SUPP 2009. [DOI: 10.1016/s1567-5688(09)71444-8] [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: 10/20/2022]
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Juárez J, Taboada P, Mosquera V. Existence of different structural intermediates on the fibrillation pathway of human serum albumin. Biophys J 2009; 96:2353-70. [PMID: 19289061 PMCID: PMC2907680 DOI: 10.1016/j.bpj.2008.12.3901] [Citation(s) in RCA: 154] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2008] [Revised: 11/18/2008] [Accepted: 12/01/2008] [Indexed: 10/21/2022] Open
Abstract
The fibrillation propensity of the multidomain protein human serum albumin (HSA) was analyzed under different solution conditions. The aggregation kinetics, protein conformational changes upon self-assembly, and structure of the different intermediates on the fibrillation pathway were determined by means of thioflavin T (ThT) fluorescence and Congo Red absorbance; far- and near-ultraviolet circular dichroism; tryptophan fluorescence; Fourier transform infrared spectroscopy; x-ray diffraction; and transmission electron, scanning electron, atomic force, and microscopies. HSA fibrillation extends over several days of incubation without the presence of a lag phase, except for HSA samples incubated at acidic pH and room temperature in the absence of electrolyte. The absence of a lag phase occurs if the initial aggregation is a downhill process that does not require a highly organized and unstable nucleus. The fibrillation process is accompanied by a progressive increase in the beta-sheet (up to 26%) and unordered conformation at the expense of alpha-helical conformation, as revealed by ThT fluorescence and circular dichroism and Fourier transform infrared spectroscopies, but changes in the secondary structure contents depend on solution conditions. These changes also involve the presence of different structural intermediates in the aggregation pathway, such as oligomeric clusters (globules), bead-like structures, and ring-shaped aggregates. We suggest that fibril formation may take place through the role of association-competent oligomeric intermediates, resulting in a kinetic pathway via clustering of these oligomeric species to yield protofibrils and then fibrils. The resultant fibrils are elongated but curly, and differ in length depending on solution conditions. Under acidic conditions, circular fibrils are commonly observed if the fibrils are sufficiently flexible and long enough for the ends to find themselves regularly in close proximity to each other. These fibrils can be formed by an antiparallel arrangement of beta-strands forming the beta-sheet structure of the HSA fibrils as the most probable configuration. Very long incubation times lead to a more complex morphological variability of amyloid mature fibrils (i.e., long straight fibrils, flat-ribbon structures, laterally connected fibers, etc.). We also observed that mature straight fibrils can also grow by protein oligomers tending to align within the immediate vicinity of the fibers. This filament + monomers/oligomers scenario is an alternative pathway to the otherwise dominant filament + filament manner of the protein fibril's lateral growth. Conformational preferences for a certain pathway to become active may exist, and the influence of environmental conditions such as pH, temperature, and salt must be considered.
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Affiliation(s)
| | - Pablo Taboada
- Grupo de Física de Coloides y Polímeros, Departamento de Física de la Materia Condensada, Facultad de Física, Universidad de Santiago de Compostela, Santiago de Compostela, Spain
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Juárez J, Taboada P, Valdez MA, Mosquera V. Self-assembly process of different poly(oxystyrene)-poly(oxyethylene) block copolymers: spontaneous formation of vesicular structures and elongated micelles. Langmuir 2008; 24:7107-7116. [PMID: 18547091 DOI: 10.1021/la8004568] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
In the present work, we investigated the micellization, gelation, and structure of the aggregates of three poly(ethylene oxide)-polystyrene oxide block copolymers (E12S10, E10S10E10, and E137S18E137, where E denotes ethylene oxide and S styrene oxide and the subscripts the block length) in solution. Two of them have similar block lengths but different structures (E12S10 and E10S10E10) and the other has longer blocks (E137S18E137). For the first time, the spontaneous formation of vesicles by a poly(oxystyrene)-poly(oxyethylene) block copolymer is reported. These vesicular structures are present when copolymer E12S10 self-assembles in aqueous solution in coexistence with spherical micelles, as confirmed by the size distribution obtained by dynamic light scattering and pictures obtained by polarized optical microscopy, and transmission and cryo-scanning electron microscopies. Vesicle sizes vary between 60 and 500 nm. On the other hand, for copolymers E10S10E10 and E137S18E137, only one species is found in solution, which is assigned to elongated and spherical micelles, respectively. If we compare the high aggregation number derived by static light scattering for the triblock block copolymer micelles, with the maximum theoretical micellar dimensions compatible with a spherical geometry, we can see that the micellar geometry cannot be spherical but must be elongated. This is corroborated by transmission electron microscopy images. On the other hand, tube inversion was used to define the mobile-immobile (soft-hard gel) phase boundaries. To refine the phase diagram and observe the existence of additional phases, rheological measurements of copolymer E137S18E137 were done. The results are in good agreement with previous values published for other polystyrene oxide-poly(ethylene oxide) block copolymers. In contrast, copolymers E12S10 and E10S10E10 did not gel in the concentration range analyzed. Thus, only certain concentrations of copolymer E10S10E10 were analyzed by rheometry, for which an upturn in the low-frequency range of the stress moduli was observed, denoting an evidence of an emerging slow process, which we assign to the first stages of formation of an elastic network.
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Affiliation(s)
- Josué Juárez
- Departamento de Investigación en Polímeros y Materiales y Departamento de Física, Universidad de Sonora, Sorales Resales y Transversal, 83000 Hermosillo Sonora, Mexico
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Castro E, Barbosa S, Juárez J, Taboada P, Katime IA, Mosquera V. Influence of External Factors on the Micellization Process and Aggregate Structure of Poly(oxy)styrene−Poly(oxy)ethylene Block Copolymers. J Phys Chem B 2008; 112:5296-304. [DOI: 10.1021/jp7112895] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Emilio Castro
- Grupo de Física de Coloides y Polímeros, Grupo de Sistemas Complejos, Departamento de Física de la Materia Condensada, Facultad de Física, Universidad de Santiago de Compostela, Santiago de Compostela, Spain, and Grupo de Nuevos Materiales y Espectroscopia Supramolecular, Departamento de Química-Física, Facultad de Ciencia y Tecnología, Campus de Leioa, Universidad del País Vasco, Apartado 644, Bilbao, Spain
| | - Silvia Barbosa
- Grupo de Física de Coloides y Polímeros, Grupo de Sistemas Complejos, Departamento de Física de la Materia Condensada, Facultad de Física, Universidad de Santiago de Compostela, Santiago de Compostela, Spain, and Grupo de Nuevos Materiales y Espectroscopia Supramolecular, Departamento de Química-Física, Facultad de Ciencia y Tecnología, Campus de Leioa, Universidad del País Vasco, Apartado 644, Bilbao, Spain
| | - Josué Juárez
- Grupo de Física de Coloides y Polímeros, Grupo de Sistemas Complejos, Departamento de Física de la Materia Condensada, Facultad de Física, Universidad de Santiago de Compostela, Santiago de Compostela, Spain, and Grupo de Nuevos Materiales y Espectroscopia Supramolecular, Departamento de Química-Física, Facultad de Ciencia y Tecnología, Campus de Leioa, Universidad del País Vasco, Apartado 644, Bilbao, Spain
| | - Pablo Taboada
- Grupo de Física de Coloides y Polímeros, Grupo de Sistemas Complejos, Departamento de Física de la Materia Condensada, Facultad de Física, Universidad de Santiago de Compostela, Santiago de Compostela, Spain, and Grupo de Nuevos Materiales y Espectroscopia Supramolecular, Departamento de Química-Física, Facultad de Ciencia y Tecnología, Campus de Leioa, Universidad del País Vasco, Apartado 644, Bilbao, Spain
| | - Issa A. Katime
- Grupo de Física de Coloides y Polímeros, Grupo de Sistemas Complejos, Departamento de Física de la Materia Condensada, Facultad de Física, Universidad de Santiago de Compostela, Santiago de Compostela, Spain, and Grupo de Nuevos Materiales y Espectroscopia Supramolecular, Departamento de Química-Física, Facultad de Ciencia y Tecnología, Campus de Leioa, Universidad del País Vasco, Apartado 644, Bilbao, Spain
| | - Víctor Mosquera
- Grupo de Física de Coloides y Polímeros, Grupo de Sistemas Complejos, Departamento de Física de la Materia Condensada, Facultad de Física, Universidad de Santiago de Compostela, Santiago de Compostela, Spain, and Grupo de Nuevos Materiales y Espectroscopia Supramolecular, Departamento de Química-Física, Facultad de Ciencia y Tecnología, Campus de Leioa, Universidad del País Vasco, Apartado 644, Bilbao, Spain
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Juárez J, Galaz JG, Machi L, Burboa M, Gutiérrez-Millán LE, Goycoolea FM, Valdez MA. Interfacial Behavior of N-Nitrosodiethylamine/Bovine Serum Albumin Complexes at the Air−Water and the Chloroform−Water Interfaces by Axisymmetric Drop Tensiometry. J Phys Chem B 2007; 111:2727-35. [PMID: 17315914 DOI: 10.1021/jp066061m] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [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: 11/29/2022]
Abstract
Interfacial properties of N-nitrosodiethylamine/bovine serum albumin (NDA/BSA) complexes were investigated at the air-water interface. The interfacial behavior at the chloroform-water interface of the interaction product of phospholipid 1,2-dipalmitoyl-sn-glycero-3-phosphocholine (DPPC), dissolved in the chloroform phase, and NDA/BSA complex, in the aqueous phase, were also analyzed by using a drop tensiometer. The secondary structure changes of BSA with different NDA concentrations were monitored by circular dichroism spectroscopy at different pH and the NDA/BSA interaction was probed by fluorescence spectroscopy. Different NDA/BSA mixtures were prepared from 0, 7.5 x 10(-5), 2.2 x 10(-4), 3.7 x 10(-4), 5 x 10(-4), 1.6 x 10(-3), and 3.1 x 10(-3) M NDA solutions in order to afford 0, 300/1, 900/1, 1 500/1, 2 000/1, 6 000/1, and 12 500/1 NDA/BSA molar ratios, respectively, in the aqueous solutions. Increments of BSA alpha-helix contents were obtained up to the 2 000/1 NDA/BSA molar ratio, but at ratios beyond this value, the alpha-helix content practically disappeared. These BSA structure changes produced an increment of the surface pressure at the air-water interface, as the alpha-helix content increased with the concentration of NDA. On the contrary, when alpha-helix content decreased, the surface pressure also appeared lower than the one obtained with pure BSA solutions. The interaction of DPPC with NDA/BSA molecules at the chloroform-water interface produced also a small, but measurable, pressure increment with the addition of NDA molecules. Dynamic light scattering measurements of the molecular sizes of NDA/BSA complex at pH 4.6, 7.1, and 8.4 indicated that the size of extended BSA molecules at pH 4.6 increased in a greater proportion with the increment in NDA concentration than at the other studied pH values. Diffusion coefficients calculated from dynamic surface tension values, using a short-term solution of the general adsorption model of Ward and Tordai, also showed differences with pH and the NDA concentration. Both, the storage and loss dilatational elastic modulus were obtained at the air-water and at the chloroform-water interfaces. The interaction of NDA/BSA with DPPC at the chloroform-water produced a less rigid monolayer than the one obtained with pure DPPC (1 x 10(-5) M), indicating a significant penetration of NDA/BSA molecules at the interface. At short times and pH 4.6, the values of the storage elastic modulus were larger and more sensible to the NDA addition than the ones at pH 7.1 and 8.4, probably due to a gel-like network formation at the air-water interface.
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Affiliation(s)
- J Juárez
- Departamento de Investigación en Polímeros y Materiales, Departamento de Física, Universidad de Sonora, Rosales y Transversal, 83000 Hermosillo Sonora, México
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Castro ST, Rodríguez CR, Perazzi BE, Radice M, Paz Sticott M, Muzio H, Juárez J, Gutkind G, Famiglietti AMR, Santini PI, Vay CA. [Comparison of different methods in order to identify Proteus spp]. Rev Argent Microbiol 2006; 38:119-24. [PMID: 17152651] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/12/2023] Open
Abstract
Comparison of different methods in order to identify Proteus spp. The objectives were: (a) to identify Proteus strains to species level, following Farmer's and O'Hara's conventional biochemical reactions; b) to evaluate the sensitivity and specificity of both the API 20E method and a schema of reduced reactions (TSI and MIO agar: motility, indole and ornithine) comparing them with conventional methodology, and c) to evaluate the utility of SDS-PAGE (total proteins) in order to identify Proteus strains to species level. Two hundred and five Proteus spp. clinical isolates, were collected between January 1998 and September 2004, from inpatients and outpatients at Hospital de Clinicas. Strains were identified by means of conventional methodology, the API 20E method, and a schema of reduced reactions. SDS-PAGE (total proteins) was used in 48 out of the 205 strains. The API 20E method identified 79 out of 87 (90.8%) strains of P. mirabilis, 103 out of 103 P. vulgaris complex, and 15 out of 15 P. penneri. Eight strains of P. mirabilis were identified as Proteus spp., the acid production from maltose being necessary to identify them to species level. The schema of reduced reactions identified 205 out of 205 (100%) strains, that is, this schema of reduced reactions identified all the strains to species level without any additional tests, in marked contrast to the API 20E method. The SDS-PAGE (total proteins) identified the three species of the genus, even if the strains of P. mirabilis showed different biochemical reactions.
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Affiliation(s)
- S T Castro
- Cátedra de Análisis Clínicos I, Laboratorio de Bacteriología, Departamento de Bioquímica Clínica, Facultad de Farmacia y Bioquímica, Hospital de Clínicas José de San Martín, Universidad de Buenos Aires, Ciudad Autónoma de Buenos Aires, Argentina
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Hernández C, Villanueva M, Juárez J, Torres M, Esparragoza L, Benito F. Complicaciones técnicas del enclavado humeral con clavo de Seidel. Rev Esp Cir Ortop Traumatol (Engl Ed) 2006. [DOI: 10.1016/s1888-4415(06)76410-4] [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: 10/27/2022] Open
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Parra-Barraza H, Burboa MG, Sánchez-Vázquez M, Juárez J, Goycoolea FM, Valdez MA. Chitosan−Cholesterol and Chitosan−Stearic Acid Interactions at the Air−Water Interface. Biomacromolecules 2005; 6:2416-26. [PMID: 16153076 DOI: 10.1021/bm050106s] [Citation(s) in RCA: 51] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
We report in this work the isotherms of cholesterol and stearic acid at the air-water interface modified by different chitosans (chitosan chloride, hydrophobic modified chitosan, and medium and high molecular weight chitosans) in the aqueous subphase. The Langmuir-Blodgett films of the complexes cholesterol-chitosan and stearic acid-chitosan are analyzed by atomic force microscopy (AFM), and a molecular simulation was performed to visualize the chitosan-lipid interactions. Strong modifications are obtained in the isotherms as a result of the chitosan interactions with cholesterol and stearic acid at the air-water interface. These modifications were dependent on the type and concentration of chitosan. Severe modifications of all phases were noticed with larger molecular areas, and the observed changes in the compressional modulus were dependent on the type of chitosan used. The complexes of chitosan-stearic acid were more flexible than the ones of chitosan-cholesterol. The AFM images demonstrated that chitosan was disaggregated by the cholesterol and stearic acid interactions producing more homogeneous surfaces in some cases. The hydrophobic chitosan showed more affinity with stearic acid, while both medium and high molecular weight chitosans produced homogeneous surfaces with cholesterol. The simulated chitosan chains interacting with cholesterol and stearic acid demonstrated the possibility of specific sites of electrostatic bonds between these molecules. Adsorption of cholesterol on the different powdered chitosans, performed by HPLC, showed that the medium and high molecular weight chitosans could retain higher proportions of cholesterol compared with the other analyzed samples.
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Affiliation(s)
- Hilda Parra-Barraza
- Departamento de Investigación en Materiales, Universidad de Sonora, Rosales y transversal, C. P. 83000 Hermosillo, Sonora, México
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Román MP, Cambra M, Juárez J, Moreno P, Duran-Vila N, Tanaka FAO, Alves E, Kitajima EW, Yamamoto PT, Bassanezi RB, Teixeira DC, Jesus WC, Ayres AJ, Gimenes-Fernandes N, Rabenstein F, Girotto LF, Bové JM. Sudden Death of Citrus in Brazil: A Graft-Transmissible Bud Union Disease. Plant Dis 2004; 88:453-467. [PMID: 30812647 DOI: 10.1094/pdis.2004.88.5.453] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Citrus Sudden Death (CSD), a new, graft-transmissible disease of sweet orange and mandarin trees grafted on Rangpur lime rootstock, was first seen in 1999 in Brazil, where it is present in the southern Triângulo Mineiro and northwestern São Paulo State. The disease is a serious threat to the citrus industry, as 85% of 200 million sweet orange trees in the State of São Paulo are grafted on Rangpur lime. After showing general decline symptoms, affected trees suddenly collapse and die, in a manner similar to trees grafted on sour orange rootstock when affected by tristeza decline caused by infection with Citrus tristeza virus (CTV). In tristeza-affected trees, the sour orange bark near the bud union undergoes profound anatomical changes. Light and electron microscopic studies showed very similar changes in the Rangpur lime bark below the bud union of CSD-affected trees: size reduction of phloem cells, collapse and necrosis of sieve tubes, overproduction and degradation of phloem, accumulation of nonfunctioning phloem (NFP), and invasion of the cortex by old NFP. In both diseases, the sweet orange bark near the bud union was also affected by necrosis of sieve tubes, and the phloem parenchyma contained characteristic "chromatic" cells. In CSD-affected trees, these cells were seen not only in the sweet orange phloem, but also in the Rangpur lime phloem. Recent observations indicated that CSD affected not only citrus trees grafted on Rangpur lime but also those on Volkamer lemon, with anatomical symptoms similar to those seen in Rangpur lime bark. Trees on alternative rootstocks, such as Cleopatra mandarin and Swingle citrumelo, showed no symptoms of CSD. CSD-affected trees did recover when they were inarched with seedlings of these rootstocks, but not when inarched with Rangpur lime seedlings. These results indicate that CSD is a bud union disease. In addition, the bark of inarched Rangpur lime and Volkamer lemon seedlings showed, near the approach-graft union, the same anatomical alterations as the bud union bark from the Rangpur lime rootstock in CSD-affected trees. The dsRNA patterns from CSD-affected trees and unaffected trees were similar and indicative of CTV. CSD-affected trees did not react by immunoprinting-ELISA using monoclonal antibodies against 11 viruses. No evidence supported the involvement of viroids in CSD. The potential involvement of CTV and other viruses in CSD is discussed.
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Affiliation(s)
- M P Román
- Departamento de Protección Vegetal y Biotec-nología, Instituto Valenciano de Investigationes Agrarias, Carretera de Moncada a Náquera km 4.5, 46113-Moncada, Valencia, Spain
| | - M Cambra
- Departamento de Protección Vegetal y Biotec-nología, Instituto Valenciano de Investigationes Agrarias, Carretera de Moncada a Náquera km 4.5, 46113-Moncada, Valencia, Spain
| | - J Juárez
- Departamento de Protección Vegetal y Biotec-nología, Instituto Valenciano de Investigationes Agrarias, Carretera de Moncada a Náquera km 4.5, 46113-Moncada, Valencia, Spain
| | - P Moreno
- Departamento de Protección Vegetal y Biotec-nología, Instituto Valenciano de Investigationes Agrarias, Carretera de Moncada a Náquera km 4.5, 46113-Moncada, Valencia, Spain
| | - N Duran-Vila
- Departamento de Protección Vegetal y Biotec-nología, Instituto Valenciano de Investigationes Agrarias, Carretera de Moncada a Náquera km 4.5, 46113-Moncada, Valencia, Spain
| | - F A O Tanaka
- NAP/MEPA, Escola Superior de Agricultura "Luiz de Queiroz", Universidade de São Paulo, Av. Pádua Dias, 11, CEP 13418-900, Piracicaba, SP, Brazil
| | - E Alves
- NAP/MEPA, Escola Superior de Agricultura "Luiz de Queiroz", Universidade de São Paulo, Av. Pádua Dias, 11, CEP 13418-900, Piracicaba, SP, Brazil
| | - E W Kitajima
- NAP/MEPA, Escola Superior de Agricultura "Luiz de Queiroz", Universidade de São Paulo, Av. Pádua Dias, 11, CEP 13418-900, Piracicaba, SP, Brazil
| | - P T Yamamoto
- Fundecitrus, Av. Dr. Ad-hemar Pereira de Barros, 201, CEP 14807-040, Araraquara, SP, Brazil
| | - R B Bassanezi
- Fundecitrus, Av. Dr. Ad-hemar Pereira de Barros, 201, CEP 14807-040, Araraquara, SP, Brazil
| | - D C Teixeira
- Fundecitrus, Av. Dr. Ad-hemar Pereira de Barros, 201, CEP 14807-040, Araraquara, SP, Brazil
| | - W C Jesus
- Fundecitrus, Av. Dr. Ad-hemar Pereira de Barros, 201, CEP 14807-040, Araraquara, SP, Brazil
| | - A J Ayres
- Fundecitrus, Av. Dr. Ad-hemar Pereira de Barros, 201, CEP 14807-040, Araraquara, SP, Brazil
| | - N Gimenes-Fernandes
- Fundecitrus, Av. Dr. Ad-hemar Pereira de Barros, 201, CEP 14807-040, Araraquara, SP, Brazil
| | - F Rabenstein
- Federal Centre for Breeding Research on Cultivated Plants, Institute of Resistance Research and Pathogen Diagnostics, P.O. Box 1505, D-06435 Aschersleben, Germany
| | - L F Girotto
- Sucocítrico Cutrale S/A, via de acesso Eng. Ivo Najm, 3800, CEP 14807-900, Araraquara, SP, Brazil
| | - J M Bové
- Institut Nationale de la Recherche Agronomique and Université de Bordeaux 2, IBVM, Laboratoire de Biologie cellulaire et moléculaire, BP 81, 33883 Villenave d'Ornon cedex, France
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Navarro L, Olivares-Fuster O, Juárez J, Aleza P, Pina J, Ballester-Olmos J, Cervera M, Fagoaga C, Duran-Vila N, Peña L. APPLICATIONS OF BIOTECHNOLOGY TO CITRUS IMPROVEMENT IN SPAIN. ACTA ACUST UNITED AC 2004. [DOI: 10.17660/actahortic.2004.632.28] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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González-Arnao MT, Juárez J, Ortega C, Navarro L, Duran-Vila N. Cryopreservation of ovules and somatic embryos of citrus using the encapsulation-dehydration technique. Cryo Letters 2003; 24:85-94. [PMID: 12819829] [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] [Subscribe] [Scholar Register] [Indexed: 03/03/2023]
Abstract
Cryopreservation of ovules and somatic embryos from several genotypes of citrus was achieved using the encapsulation-dehydration technique. Survival of cryopreserved ovules was occasional and erratic after different pregrowth conditions in liquid medium with 0.75M, 1M or up to 1.25M sucrose. An efficient cryopreservation protocol was established for somatic embryos derived from two embryogenic sources (ovules and cut thin layer explants from stigma, style and ovaries). High survival rates (75-100%) were consistently obtained after 1 day pregrowth in 0.75M sucrose, desiccation down to 20-25% moisture content in the beads and direct immersion in liquid nitrogen. The histological study showed that embryos subjected to the encapsulation-dehydration, accumulated high sucrose levels which appear to ensure the recovery of the whole embryo after cryopreservation.
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Affiliation(s)
- M T González-Arnao
- Facultad de Biología, Universidad de La Habana, Ciudad de La Habana, Cuba.
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Nakagawa J, Cordón-Rosales C, Juárez J, Itzep C, Nonami T. Impact of residual spraying on Rhodnius prolixus and Triatoma dimidiata in the department of Zacapa in Guatemala. Mem Inst Oswaldo Cruz 2003; 98:277-81. [PMID: 12764447 DOI: 10.1590/s0074-02762003000200019] [Citation(s) in RCA: 36] [Impact Index Per Article: 1.7] [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: 11/21/2022] Open
Abstract
As a vector control program to control Chagas disease in Guatemala, residual spraying of Rhodnius prolixus and Triatoma dimidiata was performed, and its impact was measured in the department of Zacapa. In order to identify infested villages and determine the degree of infestation, a baseline entomological survey to identify municipalities infested with vectors followed by an additional vector survey in areas known to be infested was conducted. Residual spraying using pyrethroid insecticides was performed at all the villages identified as being infested with the vectors. The residual spraying was shown to be highly effective against both vectors by the decrease in infestation indices after spraying. Analysis of the cost-effectiveness of the spraying showed that the average cost of insecticides per house is high when compared with that in Southern Cone countries.
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Affiliation(s)
- J Nakagawa
- Japan International Cooperation Agency, Oficina de Voluntarios Japoneses, Guatemala, Guatemala.
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Navarro L, Pina JA, Juárez J, Ballester-Olmos JF, Arregui JM, Ortega C, Navarro A, Duran-Vila N, Guerri J, Moreno P. SURVEYS AND CERTIFICATION: The Citrus Variety Improvement Program in Spain in the Period 1975-2001. ACTA ACUST UNITED AC 2002. [DOI: 10.5070/c542m9s93v] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Terán JL, Gnecco D, Galindo A, Juárez J, Aguirre-Hernández G, Enríquez RG, Soriano-García M. Crystal structure of (+)-(R)-3-methyl-1-(1'-phenyl-ethyl)-1H-pyridin-2-one. ANAL SCI 2001; 17:1247-8. [PMID: 11990609 DOI: 10.2116/analsci.17.1247] [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: 11/23/2022]
Affiliation(s)
- J L Terán
- Centro de Química del Instituto de Ciencias, BUAP, Puebla, México
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Terán JL, Gnecco D, Galindo A, Juárez J, Aguirre-Hernández G, Enríquez RG, Soriano-García M. Crystal structure of (-)-(1'R)-1-(2'-hydroxy-1'-phenyl-ethyl)-1H-pyridin-2-one. ANAL SCI 2001; 17:1139-40. [PMID: 11708078 DOI: 10.2116/analsci.17.1139] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Affiliation(s)
- J L Terán
- Centro de Química del Instituto de Ciencias, BUAP, Puebla 72570, México
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Peña L, Martín-Trillo M, Juárez J, Pina JA, Navarro L, Martínez-Zapater JM. Constitutive expression of Arabidopsis LEAFY or APETALA1 genes in citrus reduces their generation time. Nat Biotechnol 2001; 19:263-7. [PMID: 11231561 DOI: 10.1038/85719] [Citation(s) in RCA: 296] [Impact Index Per Article: 12.9] [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: 11/09/2022]
Abstract
Citrus trees have a long juvenile phase that delays their reproductive development by between 6 and 20 years, depending on the species. With the aim of accelerating their flowering time, we transformed juvenile citrus seedlings to constitutively express the Arabidopsis LEAFY (LFY) or APETALA1 (AP1) genes, which promote flower initiation in Arabidopsis. Both types of transgenic citrus produced fertile flowers and fruits as early as the first year, notably through a mechanism involving an appreciable shortening of their juvenile phase. Furthermore, expression of AP1 was as efficient as LFY in the initiation of flowers, and did not produce any severe developmental abnormality. Both types of transgenic trees flowered in consecutive years, and their flowering response was under environmental control. In addition, zygotic and nucellar derived transgenic seedlings had a very short juvenile phase and flowered in their first spring, demonstrating the stability and inheritance of this trait. These results open new possibilities for domestication, genetic improvement, and experimental research in citrus and other woody species.
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Affiliation(s)
- L Peña
- Departamento de Protección Vegetal y Biotecnología, Instituto Valenciano de Investigaciones Agrarias, Moncada, 46113 Valencia, Spain
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Terán J, Gnecco D, Galindo A, Juárez J, Bernès S, Enrı́quez R. New methodology for the synthesis of enantiopure (3R,2aR)-(−)-3-phenyl-hexahydro-oxazolo[3,2-a]-pyridin-5-one: a synthesis of (S)-(+)-coniine. ACTA ACUST UNITED AC 2001. [DOI: 10.1016/s0957-4166(01)00063-5] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Abstract
It has been described that alcohol treatment after weaning produces a delay in the onset of puberty and a decrease in the body weight of female rats; however, during development, there are periods with different sensitivity to endogenous and exogenous substances. In this study, two daily doses of 2.5 g/kg of ethanol each administered to female pups during days 13-18 of postnatal age produced an advance in the age at vaginal opening but induced no effect on the body weight; however, the onset of sexual behavior was not advanced. Fertility and reproduction measures were not significantly impaired by this treatment. It is supported that, in this period, alcohol can produce different effects - even opposite to those described in other developmental stages - which seems to represent a critical period for alcohol action.
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Affiliation(s)
- J Juárez
- Instituto de Neurociencias, Universidad de Guadalajara, Rayo 2611, Col. Jardines del Bosque, C.P. 44520, Guadalajara, Jal., Mexico.
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