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Ayora-Gutiérrez G, Abreu-Rejón AD, May-Pat A, Guerrero-Bermea C, Fernández-Escamilla VV, Rodríguez-Fuentes N, Cervantes-Uc JM, Uribe-Calderon JA. Effect of surface modification of graphene oxide with a reactive silane coupling agent on the mechanical properties and biocompatibility of acrylic bone cements. J Biomater Sci Polym Ed 2024; 35:345-363. [PMID: 38113176 DOI: 10.1080/09205063.2023.2292442] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/03/2023] [Accepted: 12/04/2023] [Indexed: 12/21/2023]
Abstract
Carbon allotrope materials (i.e. carbon nanotubes (CNTs), graphene, graphene oxide (GO)), have been used to reinforce acrylic bone cement. Nevertheless, the intrinsic incompatibility among the above materials produces a deficient interphase. Thus, in this work, the effect of the content of functionalized graphene oxide with a reactive silane on the mechanical properties and cell adhesion of acrylic bone cement was studied. GO was obtained by an oxidative process on natural graphite; subsequently, GO was functionalized with 3-methacryloxypropyltrimethoxysilane (MPS) to enhance the interphase between the graphenic material and acrylic polymeric matrix. Pristine GO and functionalized graphene oxide (GO-MPS) were characterized physicochemically (XPS, XRD, FTIR, and Raman) and morphologically (SEM and TEM). Silanized GO was added into the acrylic bone cement at different concentrations; the resulting materials were characterized mechanically, and their biocompatibility was also evaluated. The physicochemical characterization results showed that graphite was successfully oxidized, and the obtained GO was successfully functionalized with the silane coupling agent (MPS). SEM and TEM images showed that the GO is composed of few stacked layers. Compression testing results indicated a tendency of increasing stiffness and toughness of the acrylic bone cements at low concentration of functionalized GO. Additionally, the bending testing results showed a slightly increase in bone cement strain with the incorporation of GO-MPS. Finally, all samples exhibited cell viability higher than 70%, which means that materials are considered non-cytotoxic, according to the ISO 10993-5 standard.
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Affiliation(s)
| | - Antonio D Abreu-Rejón
- Centro de Investigación Científica de Yucatán, A.C, Unidad de Materiales, Mérida, México
| | - Alejandro May-Pat
- Centro de Investigación Científica de Yucatán, A.C, Unidad de Materiales, Mérida, México
| | | | | | - Nayeli Rodríguez-Fuentes
- CONAHCYT-Centro de Investigación Científica de Yucatán, A.C, Unidad de Materiales, Mérida, México
| | - José M Cervantes-Uc
- Centro de Investigación Científica de Yucatán, A.C, Unidad de Materiales, Mérida, México
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Ordóñez-Chávez GDC, Rodríguez-Fuentes N, Peñaloza-Cuevas R, Cervantes-Uc JM, Alcántara-Quintana LE, Maya-García IA, Herrera-Valencia VA, Mendiburu-Zavala CE. In vitro evaluation of crosslinked bovine pericardium as potential scaffold for the oral cavity. Biomed Mater Eng 2023; 34:561-575. [PMID: 37545206 PMCID: PMC10657658 DOI: 10.3233/bme-230027] [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: 03/01/2023] [Accepted: 07/27/2023] [Indexed: 08/08/2023]
Abstract
BACKGROUND Bovine pericardium (BP) is a scaffold widely used in soft tissues regeneration; however, its calcification in contact with glutaraldehyde, represent an opportunity for its application in hard tissues, such as bone in the oral cavity. OBJECTIVE To develop and to characterize decellularized and glutaraldehyde-crosslinked bovine pericardium (GC-BP) as a potential scaffold for guided bone regeneration GBR. METHODS BP samples from healthy animals of the bovine zebu breed were decellularized and crosslinked by digestion with detergents and glutaraldehyde respectively. The resulting cell-free scaffold was physical, chemical, mechanical, and biologically characterized thought hematoxylin and eosin staining, DNA quantification, scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FTIR), thermogravimetric analysis (TGA), differential scanning calorimetry (DSC), uniaxial tensile test, cell viability and live and dead assay in cultures of dental pulp stem cells (DPSCs). RESULTS The decellularization and crosslinking of BP appeared to induce conformational changes of the CLG molecules, which led to lower mechanical properties at the GC-BP scaffold, at the same time that promoted cell adhesion and viability of DPSCs. CONCLUSION This study suggests that the decellularized and GC-BP is a scaffold with the potential to be used promoting DPSCs recruitment, which has a great impact on the dental area.
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Affiliation(s)
| | - Nayeli Rodríguez-Fuentes
- CONACYT-Centro de Investigación Científica de Yucatán, Yucatan, Mexico
- Centro de Investigación Científica de Yucatán, Yucatan, Mexico
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3
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Abreu-Rejón AD, Herrera-Kao WA, May-Pat A, Ávila-Ortega A, Rodríguez-Fuentes N, Uribe-Calderón JA, Cervantes-Uc JM. Influence of Molecular Weight and Grafting Density of PEG on the Surface Properties of Polyurethanes and Their Effect on the Viability and Morphology of Fibroblasts and Osteoblasts. Polymers (Basel) 2022; 14:polym14224912. [PMID: 36433040 PMCID: PMC9698172 DOI: 10.3390/polym14224912] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2022] [Revised: 10/31/2022] [Accepted: 11/03/2022] [Indexed: 11/16/2022] Open
Abstract
Grafting polyethylene glycol (PEG) onto a polymer's surface is widely used to improve biocompatibility by reducing protein and cell adhesion. Although PEG is considered to be bioinert, its incorporation onto biomaterials has shown to improve cell viability depending on the amount and molecular weight (MW) used. This phenomenon was studied here by grafting PEG of three MW onto polyurethane (PU) substrata at three molar concentrations to assess their effect on PU surface properties and on the viability of osteoblasts and fibroblasts. PEG formed a covering on the substrata which increased the hydrophilicity and surface energy of PUs. Among the results, it was observed that osteoblast viability increased for all MW and grafting densities of PEG employed compared with unmodified PU. However, fibroblast viability only increased at certain combinations of MW and grafting densities of PEG, suggesting an optimal level of these parameters. PEG grafting also promoted a more spread cell morphology than that exhibited by unmodified PU; nevertheless, cells became apoptotic-like as PEG MW and grafting density were increased. These effects on cells could be due to PEG affecting culture medium pH, which became more alkaline at higher MW and concentrations of PEG. Results support the hypothesis that surface energy of PU substrates can be tuned by controlling the MW and grafting density of PEG, but these parameters should be optimized to promote cell viability without inducing apoptotic-like behavior.
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Affiliation(s)
- Antonio David Abreu-Rejón
- Centro de Investigación Científica de Yucatán, A.C, Unidad de Materiales, Calle 43 No. 130, Col. Chuburná de Hidalgo, Mérida C.P. 97205, Mexico
| | - Wilberth Antonio Herrera-Kao
- Centro de Investigación Científica de Yucatán, A.C, Unidad de Materiales, Calle 43 No. 130, Col. Chuburná de Hidalgo, Mérida C.P. 97205, Mexico
| | - Alejandro May-Pat
- Centro de Investigación Científica de Yucatán, A.C, Unidad de Materiales, Calle 43 No. 130, Col. Chuburná de Hidalgo, Mérida C.P. 97205, Mexico
| | - Alejandro Ávila-Ortega
- Facultad de Ingeniería Química, Universidad Autónoma de Yucatán, Periférico Norte Km 33.5 Tablaje Catastral 13615, Chuburná de Hidalgo Inn, Mérida C.P. 97203, Mexico
| | - Nayeli Rodríguez-Fuentes
- CONACYT-Centro de Investigación Científica de Yucatán, A.C, Unidad de Materiales, Calle 43 No. 130, Col. Chuburná de Hidalgo, Mérida C.P. 97205, Mexico
| | - Jorge Alonso Uribe-Calderón
- Centro de Investigación Científica de Yucatán, A.C, Unidad de Materiales, Calle 43 No. 130, Col. Chuburná de Hidalgo, Mérida C.P. 97205, Mexico
| | - José Manuel Cervantes-Uc
- Centro de Investigación Científica de Yucatán, A.C, Unidad de Materiales, Calle 43 No. 130, Col. Chuburná de Hidalgo, Mérida C.P. 97205, Mexico
- Correspondence: ; Tel.: +52-999-981-3966
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Abreu-Rejón AD, Herrera-Kao W, May-Pat A, Ávila-Ortega A, Rodríguez-Fuentes N, Uribe-Calderón JA, Cervantes-Uc JM. Effect of PEG grafting density on surface properties of polyurethane substrata and the viability of osteoblast and fibroblast cells. J Mater Sci Mater Med 2022; 33:45. [PMID: 35585216 PMCID: PMC9117377 DOI: 10.1007/s10856-022-06668-1] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/28/2022] [Accepted: 04/29/2022] [Indexed: 05/07/2023]
Abstract
The surface of Tecoflex SG-80A Polyurethane (PU) films was modified by grafting polyethylene glycol (PEG) chains at three different molar amounts (0.05, 0.10, and 0.15 mmol). The resulting substrata were characterized by FTIR-ATR, TGA, AFM, SEM and contact angle to assess the surface modifications occurred during the grafting reactions. Osteoblasts and fibroblasts were cultured with PU extracts for 24 h, and their cell viability and morphology were evaluated by CellTiterBlue assay, Crystal Violet staining and Live/Dead assay. FTIR and TGA results indicated that PEG chains were successfully grafted onto PU surfaces, specifically in the hard segment of PU forming allophanate groups as the PEG grafting density increased. SEM and AFM images suggest that PU substrata were partially covered by PEG, increasing the dispersive and basic components of the PU surface energy. It was found that extracts from PEG-grafted polyurethanes increased the osteoblast viability, although fibroblasts viability remained constant regardless PEG grafting density; in spite of this both cells presented a more spread morphology at the lower PEG grafting density. Our results showed that surface energy of PU substrata can be tuned by PEG grafting density; also, the PEG leached tends to increase the pH of culture medium which leads to a higher viability of osteoblasts; nevertheless, PEG grafting density should be optimized to promote a healthy cell morphology as alterations in its morphology were detected at higher concentrations. Graphical abstract.
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Affiliation(s)
- A D Abreu-Rejón
- A.C, Unidad de Materiales, Calle 43 No. 130, Centro de Investigación Científica de Yucatán, Col. Chuburná de Hidalgo, C.P. 97205, Mérida, Yucatán, México
| | - W Herrera-Kao
- A.C, Unidad de Materiales, Calle 43 No. 130, Centro de Investigación Científica de Yucatán, Col. Chuburná de Hidalgo, C.P. 97205, Mérida, Yucatán, México
| | - A May-Pat
- A.C, Unidad de Materiales, Calle 43 No. 130, Centro de Investigación Científica de Yucatán, Col. Chuburná de Hidalgo, C.P. 97205, Mérida, Yucatán, México
| | - A Ávila-Ortega
- Facultad de Ingeniería Química, Periférico Norte Km 33.5 Tablaje Catastral 13615, Universidad Autónoma de Yucatán, Chuburná de Hidalgo Inn, C.P. 97203, Mérida, Yucatán, México
| | - N Rodríguez-Fuentes
- Centro de Investigación Científica de Yucatán, A.C, Unidad de Materiales, Calle 43 No. 130, CONACYT, Col. Chuburná de Hidalgo, C.P. 97205, Mérida, Yucatán, México
| | - J A Uribe-Calderón
- A.C, Unidad de Materiales, Calle 43 No. 130, Centro de Investigación Científica de Yucatán, Col. Chuburná de Hidalgo, C.P. 97205, Mérida, Yucatán, México
| | - J M Cervantes-Uc
- A.C, Unidad de Materiales, Calle 43 No. 130, Centro de Investigación Científica de Yucatán, Col. Chuburná de Hidalgo, C.P. 97205, Mérida, Yucatán, México.
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Levenez B, Gil-Cortes T, Rodríguez-Fuentes N, Jiménez JE, Herrera-Kao W, Loría-Bastarrachea MI, May-Pat A, Guerrero-Bermea C, Uribe-Calderón J, Cervantes-Uc JM. Silanized graphene oxide as a reinforcing agent for acrylic bone cements: physicochemical, mechanical and biological characterization. J Biomater Sci Polym Ed 2021; 32:1736-1753. [PMID: 34092190 DOI: 10.1080/09205063.2021.1937464] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
Recently, different carbon-based nanomaterials have been used as reinforcing agents in acrylic bone cement formulations. Among them, graphene oxide (GO) has attracted the attention of scientific community since it could improve not only the mechanical properties but also the biocompatibility characteristics of these materials. However, using GO presents some drawbacks, such as its poor dispersion and lack of interaction with polymeric matrices, which should be prior resolved to achieve its optimal performance in acrylic bone cement. Thus, in this work, GO was treated with 3-methacryloxy propyl trimethoxy silane at various concentrations (1, 3 and 5 wt.%) to improve the interaction between the nanofiller and the poly (methyl methacrylate) matrix. Modified GO was incorporated at different percentages (0.1, 0.5 and 0.75 wt.%) into acrylic bone cement formulations and some properties were evaluated. The silanization process of the GO was confirmed by FTIR, TGA and EDX. The improvement in the mechanical performance was monitored on the compression properties whereas those related with biological properties were evaluated by osteoblast cell viability and hemocompatibility tests. Results suggest that using a 1 wt.% of the silane coupling agent, during surface treatment of GO, yields the best mechanical performance in this type of materials. It was also found that the presence of neat GO or silanized GO does not compromise the cytocompatibility and hemocompatibility of acrylic bone cement formulations.
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Affiliation(s)
- Baptiste Levenez
- Département Matériaux - Campus de Luminy, Polytech Marseille, Aix Marseille Université, Marseille, France
| | - Tania Gil-Cortes
- Centro de Investigación Científica de Yucatán, A.C, Unidad de Materiales, Mérida, México
| | - Nayeli Rodríguez-Fuentes
- CONACYT-Centro de Investigación Científica de Yucatán, A.C, Unidad de Materiales, Mérida, México
| | - Juana Enríquez Jiménez
- Departamento de Biología de la Reproducción, Instituto Nacional de Ciencias Médicas y de la Nutrición "Salvador Zubirán", Mexico City, Mexico
| | - Wilberth Herrera-Kao
- Centro de Investigación Científica de Yucatán, A.C, Unidad de Materiales, Mérida, México
| | | | - Alejandro May-Pat
- Centro de Investigación Científica de Yucatán, A.C, Unidad de Materiales, Mérida, México
| | | | - Jorge Uribe-Calderón
- Centro de Investigación Científica de Yucatán, A.C, Unidad de Materiales, Mérida, México
| | - José M Cervantes-Uc
- Centro de Investigación Científica de Yucatán, A.C, Unidad de Materiales, Mérida, México
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Peraza-Ku SA, Escobar-Morales B, Rodríguez-Fuentes N, Cervantes-Uc JM, Uribe-Calderon JA. Ceiba pentandra cellulose crosslinked with citric acid for drug release systems. Carbohydr Res 2021; 504:108334. [PMID: 33957461 DOI: 10.1016/j.carres.2021.108334] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2020] [Revised: 04/20/2021] [Accepted: 04/23/2021] [Indexed: 10/21/2022]
Abstract
An alternative for the production of drug delivery system is proposed based on the Ceiba pentandra milkweed. The kapok cellulose was chemically crosslinked with citric acid (CA) at different CA proportions, and loaded with chlorhexidine diacetate (CHX) at different concentrations. Cellulose crosslinking was followed with FTIR and XPS analysis, and the CHX loading was determined using elemental analysis. In vitro studies showed a burst release within the first 2-3 h and the drug release kinetics was described with several models. In addition, the crosslinked Ceiba pentandra fibers did not exhibit a cytotoxic effect on human dermic fibroblasts. Results indicate that the crosslinked Ceiba pentandra fibers are a feasible material for the production of systems for drug release applications.
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Affiliation(s)
- Silvia Argelia Peraza-Ku
- Centro de Investigación Científica de Yucatán, A.C., Unidad de Materiales, Calle 43 No. 130 X 32 y 34, Chuburná de Hidalgo, CP 97205, Merida, Yucatán, Mexico
| | - Beatriz Escobar-Morales
- Unidad de Energía Renovable, Carretera Sierra Papacal- Chuburna Puerto, Km. 5, C.P. 97302, Sierra Papacal, Yucatan, Mexico
| | - Nayeli Rodríguez-Fuentes
- Laboratorio de Biomateriales, Consejo Nacional de Ciencia y Tecnología, Calle 43 No. 130 X 32 y 34, Chuburná de Hidalgo, 97205, Merida, Yucatan, Mexico
| | - José Manuel Cervantes-Uc
- Centro de Investigación Científica de Yucatán, A.C., Unidad de Materiales, Calle 43 No. 130 X 32 y 34, Chuburná de Hidalgo, CP 97205, Merida, Yucatán, Mexico
| | - Jorge Alonso Uribe-Calderon
- Centro de Investigación Científica de Yucatán, A.C., Unidad de Materiales, Calle 43 No. 130 X 32 y 34, Chuburná de Hidalgo, CP 97205, Merida, Yucatán, Mexico.
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7
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Rodríguez-Fuentes N, Alcántara-Quintana LE, Hernández-Ramírez DF, Piña-Barba MC, Cervantes-Uc JM, Núñez-Álvarez CA, Ambrosio JR. Cytokines secretion from human mesenchymal stem cells induced by bovine bone matrix. Biomed Mater Eng 2021; 32:217-228. [PMID: 33780360 DOI: 10.3233/bme-218000] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
BACKGROUND Bovine bone matrix is a natural material that has been used in the treatment of bone lesions. In this study, bovine bone matrix Nukbone® (NKB) was investigated due its osteoconductive and osteoinductive properties. This biomaterial induces CBFA-1 activation and osteogenic differentiation, although the cytokines involved in these processes is still unknown. OBJECTIVE The aim of this work was to determine the influence of NKB on the pro-osteoblastic and anti-osteoblastic cytokines secretion from human mesenchymal stem cells (hMSCs). METHODS The hMSCs were cultured onto NKB and cytokines IL-2, IL-4, IL-6, IL-10, IL-12, IFN-γ and TNF-α were analized at 0-14 days by immunoassay. In addition, hemocompatibility of NKB and characterization of hMSCs were evaluated. RESULTS NKB induces an increase on pro-osteoblastic cytokine secretion IL-4 and a decrease on anti-osteoblastic cytokine IL-6 secretion, at days 7 and 14 of cell culture. Interestingly, there was no statistical difference between secretion profiles of others cytokines analized. CONCLUSIONS The up-regulation of IL-4 and down-regulation of IL-6, and the secretion profiles of other cytokines examined in this work, are findings that will contribute to the understanding of the role of NKB, and similar biomaterials, in bone homeostasis and in the osteoblastic differentiation of hMSCs.
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Affiliation(s)
| | - Luz E Alcántara-Quintana
- CONACYT, Facultad de Enfermería y Nutrición, Universidad Autónoma de San Luis Potosí, San Luis Potosí, México
| | | | - María C Piña-Barba
- Instituto de Investigaciones en Materiales, UNAM, Ciudad de México, México
| | | | - Carlos A Núñez-Álvarez
- Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán, Ciudad de México, México.,Facultad de Medicina, UNAM, Ciudad de México, México
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Belman-Flores CE, Herrera-Kao W, Vargas-Coronado RF, May-Pat A, Oliva AI, Rodríguez-Fuentes N, Vázquez-Torres H, Cauich-Rodríguez JV, Cervantes-Uc JM. Synthesis and characterization of pH sensitive hydrogel nanoparticles based on poly(N-isopropyl acrylamide-co-methacrylic acid). J Mater Sci Mater Med 2020; 31:61. [PMID: 32696259 DOI: 10.1007/s10856-020-06400-x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/25/2019] [Accepted: 07/08/2020] [Indexed: 06/11/2023]
Abstract
In this work, pH-sensitive hydrogel nanoparticles based on N-isopropyl acrylamide (NIPAM) and methacrylic acid (MAA) at various molar ratios, were synthesized and characterized in terms of physicochemical and biological properties. FTIR and 1HNMR spectra confirmed the successful synthesis of the copolymer that formed nanoparticles. AFM images and FE-SEM micrographs showed that nanoparticles were spherical, but their round-shape was slightly compromised with MAA content; besides, the size of particles tends to decrease as MAA content increased. The hydrogels nanoparticles also exhibited an interesting pH-sensitivity, displaying changes in its particle size when changes in pH media occurred. Biological characterization results indicate that all the synthesized particles are non-cytotoxic to endothelial cells and hemocompatible, although an increase of MAA content leads to a slight increase in the hemolysis percentage. Therefore, the pH-sensitivity hydrogels may serve as a versatile platform as self-regulated drug delivery systems in response to environmental pH changes.
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Affiliation(s)
- C E Belman-Flores
- Centro de Investigación Científica de Yucatán, A.C. Unidad de Materiales, Calle 43 No. 130 x32 y 34, Col. Chuburná de Hidalgo, Mérida, C.P. 97205, Yucatán, México
| | - W Herrera-Kao
- Centro de Investigación Científica de Yucatán, A.C. Unidad de Materiales, Calle 43 No. 130 x32 y 34, Col. Chuburná de Hidalgo, Mérida, C.P. 97205, Yucatán, México
| | - R F Vargas-Coronado
- Centro de Investigación Científica de Yucatán, A.C. Unidad de Materiales, Calle 43 No. 130 x32 y 34, Col. Chuburná de Hidalgo, Mérida, C.P. 97205, Yucatán, México
| | - A May-Pat
- Centro de Investigación Científica de Yucatán, A.C. Unidad de Materiales, Calle 43 No. 130 x32 y 34, Col. Chuburná de Hidalgo, Mérida, C.P. 97205, Yucatán, México
| | - A I Oliva
- Departamento de Física Aplicada, CINVESTAV-IPN, Unidad Mérida, Carretera Antigua a Progreso Km 6, Cordemex, Mérida, C.P. 97310, Yucatán, México
| | - N Rodríguez-Fuentes
- CONACYT-Centro de Investigación Científica de Yucatán, A.C. Unidad de Materiales, Calle 43 No. 130 x32 y 34, Col. Chuburná de Hidalgo, Mérida, C.P. 97205, Yucatán, México
| | - H Vázquez-Torres
- Departamento de Física, Área de Polímeros, Universidad Autónoma Metropolitana-Unidad Iztapalapa, San Rafael Atlixco No. 186, Col. Vicentina, Ciudad de México, C.P. 09340, México
| | - J V Cauich-Rodríguez
- Centro de Investigación Científica de Yucatán, A.C. Unidad de Materiales, Calle 43 No. 130 x32 y 34, Col. Chuburná de Hidalgo, Mérida, C.P. 97205, Yucatán, México
| | - J M Cervantes-Uc
- Centro de Investigación Científica de Yucatán, A.C. Unidad de Materiales, Calle 43 No. 130 x32 y 34, Col. Chuburná de Hidalgo, Mérida, C.P. 97205, Yucatán, México.
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Rodríguez-Fuentes N, Reynoso-Ducoing O, Rodríguez-Hernández A, Ambrosio-Hernández JR, Piña-Barba MC, Zepeda-Rodríguez A, Cerbón-Cervantes MA, Tapia-Ramírez J, Alcantara-Quintana LE. Isolation of human mesenchymal stem cells and their cultivation on the porous bone matrix. J Vis Exp 2015:e51999. [PMID: 25742362 PMCID: PMC4354626 DOI: 10.3791/51999] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022] Open
Abstract
Mesenchymal stem cells (MSCs) have a differentiation potential towards osteoblastic lineage when they are stimulated with soluble factors or specific biomaterials. This work presents a novel option for the delivery of MSCs from human amniotic membrane (AM-hMSCs) that employs bovine bone matrix Nukbone (NKB) as a scaffold. Thus, the application of MSCs in repair and tissue regeneration processes depends principally on the efficient implementation of the techniques for placing these cells in a host tissue. For this reason, the design of biomaterials and cellular scaffolds has gained importance in recent years because the topographical characteristics of the selected scaffold must ensure adhesion, proliferation and differentiation into the desired cell lineage in the microenvironment of the injured tissue. This option for the delivery of MSCs from human amniotic membrane (AM-hMSCs) employs bovine bone matrix as a cellular scaffold and is an efficient culture technique because the cells respond to the topographic characteristics of the bovine bone matrix Nukbone (NKB), i.e., spreading on the surface, macroporous covering and colonizing the depth of the biomaterial, after the cell isolation process. We present the procedure for isolating and culturing MSCs on a bovine matrix.
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Affiliation(s)
- Nayeli Rodríguez-Fuentes
- Depto. Materiales Metálicos y Cerámicos, Instituto de Investigaciones en Materiales, Universidad Nacional Autónoma de México (UNAM)
| | - Olivia Reynoso-Ducoing
- Depto. of Microbiología y Parasitología, Facultad de Medicina, Universidad Nacional Autónoma de México (UNAM)
| | - Ana Rodríguez-Hernández
- Depto. of Microbiología y Parasitología, Facultad de Medicina, Universidad Nacional Autónoma de México (UNAM)
| | - Javier R Ambrosio-Hernández
- Depto. of Microbiología y Parasitología, Facultad de Medicina, Universidad Nacional Autónoma de México (UNAM)
| | - Maria C Piña-Barba
- Depto. Materiales Metálicos y Cerámicos, Instituto de Investigaciones en Materiales, Universidad Nacional Autónoma de México (UNAM)
| | - Armando Zepeda-Rodríguez
- Depto. Biología Celular y Tisular, Facultad de Medicina, Universidad Nacional Autónoma de México (UNAM)
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Leyva-Gómez G, Lima E, Krötzsch G, Pacheco-Marín R, Rodríguez-Fuentes N, Quintanar-Guerrero D, Krötzsch E. Physicochemical and Functional Characterization of the Collagen–Polyvinylpyrrolidone Copolymer. J Phys Chem B 2014; 118:9272-83. [DOI: 10.1021/jp502476x] [Citation(s) in RCA: 12] [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: 01/23/2023]
Affiliation(s)
- Gerardo Leyva-Gómez
- Laboratory of
Connective Tissue, Centro Nacional de Investigación y Atención
de Quemados, Instituto Nacional de Rehabilitación, Mexico City, Mexico
| | - Enrique Lima
- Instituto
de Investigaciones
en Materiales, Universidad Nacional Autónoma de México, Circuito
exterior s/n, Cd. Universitaria, Del. Coyoacán, C.P. 04510 México D. F., Mexico
| | - Guillermo Krötzsch
- Instituto de Ciencias
Fı́sicas, Universidad Nacional Autónoma de México, Av.
Universidad s/n, Col. Chamilpa, C.P.
62210, Cuernavaca City, Mexico
| | - Rosario Pacheco-Marín
- Laboratory
of
Molecular Biology, Instituto Nacional de Medicina Genómica, Periférico Sur 4124, Torre
Zafiro II 5to piso, Col. Ex-Rancho de Anzaldo, Mexico City, Mexico
| | - Nayeli Rodríguez-Fuentes
- Departamento
de Materiales Metálicos y Cerámicos, Instituto
de Investigaciones en Materiales, Universidad Nacional Autónoma de México, Circuito exterior s/n, Cd. Universitaria, Del. Coyoacán, C.P. 04510, México D. F., Mexico
| | - David Quintanar-Guerrero
- Laboratorio de Investigación
y Posgrado en Tecnologı́a Farmacéutica, Facultad
de Estudios Superiores Cuautitlán, Universidad Nacional Autónoma de México, Av. 1° de Mayo s/n, Col.
Sta. Marı́a las Torres, Cuautitlán Izcalli, Estado de México C.P.
54740, Mexico
| | - Edgar Krötzsch
- Laboratory of
Connective Tissue, Centro Nacional de Investigación y Atención
de Quemados, Instituto Nacional de Rehabilitación, Mexico City, Mexico
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Velázquez-Arellano A, Hernández-Esquivel MDLL, Sánchez RM, Ortega-Cuellar D, Rodríguez-Fuentes N, Cano S, León-Del-Río A, Carvajal K. Functional and metabolic implications of biotin deficiency for the rat heart. Mol Genet Metab 2008; 95:213-9. [PMID: 18824381 DOI: 10.1016/j.ymgme.2008.08.002] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/05/2008] [Revised: 08/01/2008] [Accepted: 08/02/2008] [Indexed: 12/01/2022]
Abstract
The tricarboxylic acid (TCA) cycle is the main ATP provider for the heart. TCA carbons must be replenished by anaplerosis for normal cardiac function. Biotin is cofactor of the anaplerotic enzymes pyruvate and propionyl-CoA carboxylases. Here, we found that in biotin deficient rats, both carboxylases decreased 90% in adipose tissue, jejunum and spleen, but in heart they conserved about 60% residual activity. We then investigated if under biotin deficiency (BtDEF), the heart is able to maintain its function in vivo and in isolated conditions, and during ischemia and reperfusion, where metabolism drastically shifts from oxidative to mainly glycolytic. Neither glucose nor octanoate oxidation were severely affected in BtDEF hearts, as assessed by mechanical performance, oxygen uptake or high-energy metabolite content; however, myocardial hexokinase activity and lactate concentration were reduced in deficient hearts. When challenged by ischemia and reperfusion injury, BtDEF hearts did not suffer more damage than the controls, although they lowered significantly their performance, when changed to ischemic conditions, which may have clinical implications. Post-ischemic increase in ADP/ATP ratio was similar in both groups, but during reperfusion there was higher rhythm perturbation in BtDEF hearts. By being relatively insensitive to biotin deficiency, cardiac tissue seems to be able to replenish TCA cycle intermediates and to maintain ATP synthesis.
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Affiliation(s)
- Antonio Velázquez-Arellano
- Unidad de Genética de la Nutrición, Instituto de Investigaciones Biomédicas, Universidad Nacional Autónoma de México, Mexico
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Rodríguez-Fuentes N, López-Rosas I, Román-Cisneros G, Velázquez-Arellano A. Biotin deficiency affects both synthesis and degradation of pyruvate carboxylase in rat primary hepatocyte cultures. Mol Genet Metab 2007; 92:222-8. [PMID: 17720579 DOI: 10.1016/j.ymgme.2007.06.021] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/14/2007] [Revised: 06/29/2007] [Accepted: 06/29/2007] [Indexed: 11/20/2022]
Abstract
Pyruvate carboxylase (PC) is a biotin-dependent enzyme that plays a crucial role in gluconeogenesis, lipogenesis, Krebs cycle anaplerosis and amino acid catabolism. Biotin deficiency reduces its mass besides its activity. Enzyme mass is the result of its cellular turnover, i.e., its rates of synthesis and degradation. We have now investigated, by a pulse and chase approach in cultured primary hepatocytes, the effects of biotin deficiency on these rates. Wistar rats were fed a biotin-deficient diet and the controls were fed the same diet supplemented with biotin; their biotin status was monitored measuring lymphocytes propionyl-CoA carboxylase activity and urinary 3-hydroxyisovaleric acid. After 6-7 weeks primary hepatocytes were cultured in biotin-deficient or complete DMEM. PC activity was determined by measuring the incorporation of (14)C-bicarbonate into acid-non-volatile products, and its mass by streptavidin Western blots. Its synthesis rate was estimated from [(35)S] methionine incorporation into anti-PC antibody immunoprecipitate. Its degradation rate was calculated from the loss of radioactivity from previously labeled hepatocytes, in a medium containing an excess of non-radioactive methionine. PC synthesis rate in biotin-deficient hepatocytes was approximately 4.5-fold lower than in the controls, and its degradation rate was 5.1-fold higher. Therefore, the decrement of PC mass during biotin deficiency results both from a decrease in its synthesis and an increase in its degradation rates. To our knowledge, this is the first instance where a mammalian enzyme cofactor is necessary to sustain both processes.
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Affiliation(s)
- Nayeli Rodríguez-Fuentes
- Instituto de Investigaciones Biomédicas de la Universidad Nacional Autónoma de Mexico, Instituto Nacional de Pediatría, Department of Nutritional Genetics, Torre de Investigacion, Av. del IMAN No. 1, 4o. piso, D.F. 04530 México City, Mexico
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