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Ramirez SP, Hernandez I, Balcorta HV, Kumar P, Kumar V, Poon W, Joddar B. Microcomputed Tomography for the Microstructure Evaluation of 3D Bioprinted Scaffolds. ACS APPLIED BIO MATERIALS 2023. [PMID: 37871142 DOI: 10.1021/acsabm.3c00621] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2023]
Abstract
This study implemented the application of microcomputed tomography (micro-CT) as a characterization technique for the study and investigation of the microstructure of 3D scaffold structures produced via three-dimensional bioprinting (3DBP). The study focused on the preparation, characterization, and cytotoxicity analysis of gold nanoparticles (Au-NPs) incorporated into 3DBP hydrogels for micro-CT evaluation. The Au-NPs were characterized by using various techniques, including UV-vis spectrometry, dynamic light scattering (DLS), zeta potential measurement, and transmission electron microscopy (TEM). The characterization results confirmed the successful coating of the Au-NPs with 2 kDa methoxy-PEG and revealed their spherical shape with a mean core diameter of 66 nm. Cytotoxicity analysis using live-dead fluorescent microscopy indicated that all tested Au-NP solutions were nontoxic to AC16 cardiomyocytes in both 2D and 3D culture conditions. Scanning electron microscopy (SEM) showed distinguishable differences in image contrast and intensity between samples with and without Au-NPs, with high concentrations of Au-NPs displaying nanoparticle aggregates. Micro-CT imaging demonstrated that scaffolds containing Au-NPs depicted enhanced imaging resolution and quality, allowing for visualization of the microstructure. The 3D reconstruction of scaffold structures from micro-CT imaging using Dragonfly software further supported the improved visualization. Mechanical analysis revealed that the addition of Au-NPs enhanced the mechanical properties of acellular scaffolds, including their elastic moduli and complex viscosity, but the presence of cells led to biodegradation and reduced mechanical strength. These findings highlight the successful preparation and characterization of Au-NPs, their nontoxic nature in both 2D and 3D culture conditions, their influence on imaging quality, and the impact on the mechanical properties of 3D-printed hydrogels. These results contribute to the development of functional and biocompatible materials for tissue engineering and regenerative medicine applications.
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Affiliation(s)
- Salma P Ramirez
- Inspired Materials & Stem-Cell Based Tissue Engineering Laboratory (IMSTEL), The University of Texas at El Paso, El Paso, Texas 79968, United States
- Department of Metallurgical, Materials, and Biomedical Engineering, The University of Texas at El Paso, El Paso, Texas 79968, United States
| | - Ivana Hernandez
- Inspired Materials & Stem-Cell Based Tissue Engineering Laboratory (IMSTEL), The University of Texas at El Paso, El Paso, Texas 79968, United States
- Department of Metallurgical, Materials, and Biomedical Engineering, The University of Texas at El Paso, El Paso, Texas 79968, United States
| | - Hannia V Balcorta
- Department of Metallurgical, Materials, and Biomedical Engineering, The University of Texas at El Paso, El Paso, Texas 79968, United States
- Delivery Systems and Nano-Therapeutics Innovation Laboratory (DESTINATION), The University of Texas at El Paso, El Paso, Texas 79968, United States
| | - Piyush Kumar
- Department of Aerospace and Mechanical Engineering, The University of Texas at El Paso, El Paso, Texas 79968, United States
| | - Vinod Kumar
- Department of Aerospace and Mechanical Engineering, The University of Texas at El Paso, El Paso, Texas 79968, United States
| | - Wilson Poon
- Department of Metallurgical, Materials, and Biomedical Engineering, The University of Texas at El Paso, El Paso, Texas 79968, United States
- Delivery Systems and Nano-Therapeutics Innovation Laboratory (DESTINATION), The University of Texas at El Paso, El Paso, Texas 79968, United States
| | - Binata Joddar
- Inspired Materials & Stem-Cell Based Tissue Engineering Laboratory (IMSTEL), The University of Texas at El Paso, El Paso, Texas 79968, United States
- Department of Metallurgical, Materials, and Biomedical Engineering, The University of Texas at El Paso, El Paso, Texas 79968, United States
- Border Biomedical Research Center, The University of Texas at El Paso, 500 W. University Avenue, El Paso, Texas 79968, United States
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Sheng W, Song Q, Su X, Lu Y, Bai Y, Ji F, Zhang L, Yang R, Fu X. Sodium alginate/gelatin hydrogels loaded with adipose-derived mesenchymal stem cells promote wound healing in diabetic rats. J Cosmet Dermatol 2023; 22:1670-1679. [PMID: 36718822 DOI: 10.1111/jocd.15631] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2022] [Revised: 12/25/2022] [Accepted: 01/03/2023] [Indexed: 02/01/2023]
Abstract
BACKGROUND Chronic refractory wounds are a common complication in diabetic patients. Adipose-derived mesenchymal stem cells (ASCs) have been shown to play an essential role in diabetic wound repair. AIMS To determine whether a composite of ASCs and sodium alginate/gelatin (Gel-Al) hydrogel can promote diabetic wound healing. METHODS Full-thickness cutaneous wounds were created in streptozotocin-induced diabetic rats prior to treatment with Gel-Al hydrogels loaded with ASCs. Hydrogel biocompatibility and wound healing were analyzed. Hematoxylin and eosin staining, Masson staining, immunofluorescence, enzyme-linked immunosorbent assays (ELISA), and quantitative real-time PCR were performed for the assessment of cellular responses. RESULTS Compared to the control group or Gel-Al alone group, the combination of Gel-Al and ASCs promoted wound closure, facilitated granulation tissue regeneration and collagen deposition, and upregulated the expression of vascular endothelial growth factor (VEGF), platelet-derived growth factor (PDGF), epidermal growth factor (EGF), and endothelial cell marker CD31. Moreover, the combination of Gel-Al and ASCs decreased interleukin-6 (IL-6) and interleukin-1β (IL-1β) expression, increased transforming growth factor beta1 (TGFβ1), interleukin-10 (IL-10), interleukin-4 (IL-4) and interleukin-13 (IL-13) expression, and increased M2 macrophage polarization. CONCLUSIONS Gel-Al hydrogels loaded with ASCs accelerate diabetic wound healing. The Gel-Al hydrogel-based ASC system therefore represents an innovative therapeutic strategy for diabetic wound repair.
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Affiliation(s)
- Wei Sheng
- Medical School of Chinese PLA, Beijing, China.,Department of Tissue Repair and Regeneration, The First Medical Center, Chinese PLA General Hospital, Beijing, China.,Medical Innovation Research Department, Chinese PLA General Hospital, Beijing, China
| | - Qi Song
- Department of Oncology, The Fifth Medical Center, Chinese PLA General Hospital, Beijing, China
| | - XiangZheng Su
- Department of Tissue Repair and Regeneration, The First Medical Center, Chinese PLA General Hospital, Beijing, China
| | - Yao Lu
- Department of Tissue Repair and Regeneration, The First Medical Center, Chinese PLA General Hospital, Beijing, China
| | - YuZhe Bai
- Department of Tissue Repair and Regeneration, The First Medical Center, Chinese PLA General Hospital, Beijing, China
| | - FengKun Ji
- Department of Tissue Repair and Regeneration, The First Medical Center, Chinese PLA General Hospital, Beijing, China
| | - Li Zhang
- Department of Rehabilitation Medicine, The Second Medical Center & National Clinical Research Center for Geriatric Diseases, Chinese PLA General Hospital, Beijing, China
| | - RunGong Yang
- Department of Tissue Repair and Regeneration, The First Medical Center, Chinese PLA General Hospital, Beijing, China
| | - Xiaobing Fu
- Key Laboratory of Tissue Repair and Regeneration, and Beijing Key Research Laboratory of Skin Injury, Repair and Regeneration, Chinese PLA General Hospital, Beijing, China
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Manouchehri S, Zarrintaj P, Saeb MR, Ramsey JD. Advanced Delivery Systems Based on Lysine or Lysine Polymers. Mol Pharm 2021; 18:3652-3670. [PMID: 34519501 DOI: 10.1021/acs.molpharmaceut.1c00474] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Polylysine and materials that integrate lysine form promising drug delivery platforms. As a cationic macromolecule, a polylysine polymer electrostatically interacts with cells and is efficiently internalized, thereby enabling intracellular delivery. Although polylysine is intrinsically pH-responsive, the conjugation with different functional groups imparts smart, stimuli-responsive traits by adding pH-, temperature-, hypoxia-, redox-, and enzyme-responsive features for enhanced delivery of therapeutic agents. Because of such characteristics, polylysine has been used to deliver various cargos such as small-molecule drugs, genes, proteins, and imaging agents. Furthermore, modifying contrast agents with polylysine has been shown to improve performance, including increasing cellular uptake and stability. In this review, the use of lysine residues, peptides, and polymers in various drug delivery systems has been discussed comprehensively to provide insight into the design and robust manufacturing of lysine-based delivery platforms.
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Affiliation(s)
- Saeed Manouchehri
- School of Chemical Engineering, Oklahoma State University, 420 Engineering North, Stillwater, Oklahoma 74078, United States
| | - Payam Zarrintaj
- School of Chemical Engineering, Oklahoma State University, 420 Engineering North, Stillwater, Oklahoma 74078, United States
| | | | - Joshua D Ramsey
- School of Chemical Engineering, Oklahoma State University, 420 Engineering North, Stillwater, Oklahoma 74078, United States
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4
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Characterization of encapsulated porcine cardiosphere-derived cells embedded in 3D alginate matrices. Int J Pharm 2021; 599:120454. [PMID: 33676988 DOI: 10.1016/j.ijpharm.2021.120454] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2021] [Revised: 02/23/2021] [Accepted: 03/01/2021] [Indexed: 12/22/2022]
Abstract
Myocardial infarction is caused by an interruption of coronary blood flow, leading to one of the main death causes worldwide. Current therapeutic approaches are palliative and not able to solve the loss of cardiac tissue. Cardiosphere derived cells (CDCs) reduce scarring, and increase viable myocardium, with safety and adequate biodistribution, but show a low rate engraftment and survival after implantation. In order to solve the low retention, we propose the encapsulation of CDCs within three-dimensional alginate-poly-L-lysine-alginate matrix as therapy for cardiac regeneration. In this work, we demonstrate the encapsulation of CDCs in alginate matrix, with no decrease in viability over a month, and showing the preservation of CDCs phenotype, differentiation potential, gene expression profile and growth factor release after encapsulation, moving a step forward to clinical translation of CDCs therapy in regeneration in heart failure.
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Alonzo M, Kumar SA, Allen S, Delgado M, Alvarez-Primo F, Suggs L, Joddar B. Hydrogel scaffolds with elasticity-mimicking embryonic substrates promote cardiac cellular network formation. Prog Biomater 2020; 9:125-137. [PMID: 32978746 PMCID: PMC7544760 DOI: 10.1007/s40204-020-00137-0] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2020] [Accepted: 09/17/2020] [Indexed: 12/21/2022] Open
Abstract
Hydrogels are a class of biomaterials used for a wide range of biomedical applications, including as a three-dimensional (3D) scaffold for cell culture that mimics the extracellular matrix (ECM) of native tissues. To understand the role of the ECM in the modulation of cardiac cell function, alginate was used to fabricate crosslinked gels with stiffness values that resembled embryonic (2.66 ± 0.84 kPa), physiologic (8.98 ± 1.29 kPa) and fibrotic (18.27 ± 3.17 kPa) cardiac tissues. The average pore diameter and hydrogel swelling were seen to decrease with increasing substrate stiffness. Cardiomyocytes cultured within soft embryonic gels demonstrated enhanced cell spreading, elongation, and network formation, while a progressive increase in gel stiffness diminished these behaviors. Cell viability decreased with increasing hydrogel stiffness. Furthermore, cells in fibrotic gels showed enhanced protein expression of the characteristic cardiac stress biomarker, Troponin-I, while reduced protein expression of the cardiac gap junction protein, Connexin-43, in comparison to cells within embryonic gels. The results from this study demonstrate the role that 3D substrate stiffness has on cardiac tissue formation and its implications in the development of complex matrix remodeling-based conditions, such as myocardial fibrosis.
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Affiliation(s)
- Matthew Alonzo
- Inspired Materials and Stem-Cell Based Tissue Engineering Laboratory (IMSTEL), El Paso, USA
- Department of Metallurgical, Materials and Biomedical Engineering, M201 Engineering, The University of Texas at El Paso, 500 W University Avenue, El Paso, TX, 79968, USA
| | - Shweta Anil Kumar
- Inspired Materials and Stem-Cell Based Tissue Engineering Laboratory (IMSTEL), El Paso, USA
- Department of Metallurgical, Materials and Biomedical Engineering, M201 Engineering, The University of Texas at El Paso, 500 W University Avenue, El Paso, TX, 79968, USA
| | - Shane Allen
- Department of Biomedical Engineering, The University of Texas at Austin, 1 University Station, Austin, TX, 78712, USA
| | - Monica Delgado
- Inspired Materials and Stem-Cell Based Tissue Engineering Laboratory (IMSTEL), El Paso, USA
- Department of Metallurgical, Materials and Biomedical Engineering, M201 Engineering, The University of Texas at El Paso, 500 W University Avenue, El Paso, TX, 79968, USA
| | - Fabian Alvarez-Primo
- Inspired Materials and Stem-Cell Based Tissue Engineering Laboratory (IMSTEL), El Paso, USA
- Department of Metallurgical, Materials and Biomedical Engineering, M201 Engineering, The University of Texas at El Paso, 500 W University Avenue, El Paso, TX, 79968, USA
| | - Laura Suggs
- Department of Biomedical Engineering, The University of Texas at Austin, 1 University Station, Austin, TX, 78712, USA
| | - Binata Joddar
- Inspired Materials and Stem-Cell Based Tissue Engineering Laboratory (IMSTEL), El Paso, USA.
- Department of Metallurgical, Materials and Biomedical Engineering, M201 Engineering, The University of Texas at El Paso, 500 W University Avenue, El Paso, TX, 79968, USA.
- Border Biomedical Research Center, The University of Texas at El Paso, 500 W University Avenue, El Paso, TX, 79968, USA.
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Zhao W, Xu T. Preliminary engineering for in situ in vivo bioprinting: a novel micro bioprinting platform for in situ in vivo bioprinting at a gastric wound site. Biofabrication 2020; 12:045020. [PMID: 32784271 DOI: 10.1088/1758-5090/aba4ff] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
We first proposed the concept of in situ in vivo bioprinting in order to address the existing deficiencies in conventional bioprinting. Herein we verified this concept taking the case of the treatment for gastric wall injury and presented this work as a preliminary step towards a new method in the field of bioprinting. In this study, a micro bioprinting platform which can be installed to an endoscope was developed to enter the human body and process bioprinting. Printed circuit micro-electro-mechanical-system techniques were used in the design and fabrication of the platform. Control system with high accuracy was developed and performance tests were carried out to verify the feasibility of the platform. The 2-layer tissue scaffolds were printed in a stomach model. Gelatin-alginate hydrogels with human gastric epithelial cells and human gastric smooth muscle cells were used as bioinks to mimic the anatomical structure of a stomach. A 10 d cell culture showed that printed cells remained a high viability and a steady proliferation, which indicated good biological function of cells in printed tissue scaffolds. This work presents an innovative advance not only in the field of bioprinting but also in the clinical sciences.
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Affiliation(s)
- Wenxiang Zhao
- Biomanufacturing Center, Department of Mechanical Engineering, Tsinghua University, Beijing 100084, People's Republic of China
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Foong D, Zhou J, Zarrouk A, Ho V, O’Connor MD. Understanding the Biology of Human Interstitial Cells of Cajal in Gastrointestinal Motility. Int J Mol Sci 2020; 21:ijms21124540. [PMID: 32630607 PMCID: PMC7352366 DOI: 10.3390/ijms21124540] [Citation(s) in RCA: 51] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2020] [Revised: 06/19/2020] [Accepted: 06/23/2020] [Indexed: 12/11/2022] Open
Abstract
Millions of patients worldwide suffer from gastrointestinal (GI) motility disorders such as gastroparesis. These disorders typically include debilitating symptoms, such as chronic nausea and vomiting. As no cures are currently available, clinical care is limited to symptom management, while the underlying causes of impaired GI motility remain unaddressed. The efficient movement of contents through the GI tract is facilitated by peristalsis. These rhythmic slow waves of GI muscle contraction are mediated by several cell types, including smooth muscle cells, enteric neurons, telocytes, and specialised gut pacemaker cells called interstitial cells of Cajal (ICC). As ICC dysfunction or loss has been implicated in several GI motility disorders, ICC represent a potentially valuable therapeutic target. Due to their availability, murine ICC have been extensively studied at the molecular level using both normal and diseased GI tissue. In contrast, relatively little is known about the biology of human ICC or their involvement in GI disease pathogenesis. Here, we demonstrate human gastric tissue as a source of primary human cells with ICC phenotype. Further characterisation of these cells will provide new insights into human GI biology, with the potential for developing novel therapies to address the fundamental causes of GI dysmotility.
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Affiliation(s)
- Daphne Foong
- School of Medicine, Western Sydney University, Campbelltown, NSW 2560, Australia; (D.F.); (J.Z.); (V.H.)
| | - Jerry Zhou
- School of Medicine, Western Sydney University, Campbelltown, NSW 2560, Australia; (D.F.); (J.Z.); (V.H.)
| | - Ali Zarrouk
- Campbelltown Private Hospital, Campbelltown, NSW 2560, Australia;
| | - Vincent Ho
- School of Medicine, Western Sydney University, Campbelltown, NSW 2560, Australia; (D.F.); (J.Z.); (V.H.)
- Campbelltown Private Hospital, Campbelltown, NSW 2560, Australia;
| | - Michael D. O’Connor
- School of Medicine, Western Sydney University, Campbelltown, NSW 2560, Australia; (D.F.); (J.Z.); (V.H.)
- Correspondence:
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8
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Nguyen TPT, Le NXT, Lee NY. Microfluidic Approach to Generate a Tadpole-Egg-Shaped Alginate Fiber and Its Application in Tissue Engineering. ACS Biomater Sci Eng 2019; 6:1663-1670. [PMID: 33455358 DOI: 10.1021/acsbiomaterials.9b01753] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Herein, we introduce a facile microfluidic technique to produce a hybrid alginate fiber with a tadpole-egg shape. A triple-flow polydimethylsiloxane microfluidic device was constructed to allow the formation of oil droplets inside the alginate stream and was instantaneously gelated with the coaxially adjacent CaCl2. The fiber entrapping the uniform oil droplets was dehydrated, leading to the formation of a distinct tadpole-egg-shaped structure. A series of diverse fiber architectures was fabricated in a controlled manner based on the flow rates of the relevant flows. The tadpole-egg-shaped alginate fibers were employed as building blocks to create a three-dimensional microwell template for cell cultures. First, the tadpole-egg-shaped alginate fibers containing the oil droplets were half-dipped into a melted agarose solution. After the solidification of the agarose gel, the alginate fibers were degraded by an ethylenediaminetetraacetic acid (EDTA) solution to generate the hemispherical microwells. Mesenchymal stem cells (MSCs) were cultured in the microwells to generate spheroids, which were induced into chondrocytes using transforming growth factor-β3. The formed MSC spheroids exhibited a relatively high ratio of cell viability with more than 95% live cells after 14 days of culture. The success of the chondrogenic differentiation was proven based on staining (Safranin O) and the glycosaminoglycan levels. The latter was significantly higher in spheroids that were induced to form chondrocytes compared to those that were not induced after 21 days of differentiation. Second, we investigated the potential of the tadpole-egg-shaped alginate fibers as microcarriers for applications in drug delivery and implantable technologies. It was revealed that the degradation of the Ca-alginate wall of the hybrid fibers to release the oil droplets required an EDTA solution with a concentration of 500 mM for a 15 min period. This result can be used to further develop the tadpole-egg-shaped alginate fibers as uniform microcarriers with multiple compartments.
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Affiliation(s)
- Thi Phuong Thuy Nguyen
- Department of BioNano Technology, Gachon University, 1342 Seongnam-daero, Sujeong-gu, Seongnam-si, Gyeonggi-do 13120, Republic of Korea
| | - Nguyen Xuan Thanh Le
- Department of BioNano Technology, Gachon University, 1342 Seongnam-daero, Sujeong-gu, Seongnam-si, Gyeonggi-do 13120, Republic of Korea
| | - Nae Yoon Lee
- Department of BioNano Technology, Gachon University, 1342 Seongnam-daero, Sujeong-gu, Seongnam-si, Gyeonggi-do 13120, Republic of Korea
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9
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Alvarez-Primo F, Anil Kumar S, Manciu FS, Joddar B. Fabrication of Surfactant-Dispersed HiPco Single-Walled Carbon Nanotube-Based Alginate Hydrogel Composites as Cellular Products. Int J Mol Sci 2019; 20:ijms20194802. [PMID: 31569637 PMCID: PMC6801781 DOI: 10.3390/ijms20194802] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2019] [Revised: 09/24/2019] [Accepted: 09/24/2019] [Indexed: 02/07/2023] Open
Abstract
In this study, we designed, synthesized, and characterized ultrahigh purity single-walled carbon nanotube (SWCNT)-alginate hydrogel composites. Among the parameters of importance in the formation of an alginate-based hydrogel composite with single-walled carbon nanotubes, are their varying degrees of purity, their particulate agglomeration and their dose-dependent correlation to cell viability, all of which have an impact on the resultant composite’s efficiency and effectiveness towards cell-therapy. To promote their homogenous dispersion by preventing agglomeration of the SWCNT, three different surfactants-sodium dodecyl sulfate (SDS-anionic), cetyltrimethylammonium bromide (CTAB-cationic), and Pluronic F108 (nonionic)-were utilized. After mixing of the SWCNT-surfactant with alginate, the mixtures were cross-linked using divalent calcium ions and characterized using Raman spectroscopy. Rheometric analysis showed an increase in complex viscosity, loss, and storage moduli of the SWCNT composite gels in comparison with pure alginate gels. Scanning electron microscopy revealed the presence of a well-distributed porous structure, and all SWCNT-gel composites depicted enhanced electrical conductivity with respect to alginate gels. To characterize their biocompatibility, cardiomyocytes were cultured atop these SWCNT-gels. Results comprehensively implied that Pluronic F108 was most efficient in preventing agglomeration of the SWCNTs in the alginate matrix, leading to a stable scaffold formation without posing any toxicity to the cells.
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Affiliation(s)
- Fabian Alvarez-Primo
- Inspired Materials & Stem-Cell Based Tissue Engineering Laboratory (IMSTEL), El Paso, TX 79902, USA.
- Department of Metallurgical, Materials and Biomedical Engineering, M201 Engineering, University of Texas at El Paso, 500 W University Avenue, El Paso, TX 79968, USA.
| | - Shweta Anil Kumar
- Inspired Materials & Stem-Cell Based Tissue Engineering Laboratory (IMSTEL), El Paso, TX 79902, USA.
- Department of Metallurgical, Materials and Biomedical Engineering, M201 Engineering, University of Texas at El Paso, 500 W University Avenue, El Paso, TX 79968, USA.
| | - Felicia S Manciu
- Department of Physics, University of Texas at El Paso, 500 W University Avenue, El Paso, TX 79968, USA.
- Border Biomedical Research Center, University of Texas at El Paso, 500 W University Avenue, El Paso, TX 79968, USA.
| | - Binata Joddar
- Inspired Materials & Stem-Cell Based Tissue Engineering Laboratory (IMSTEL), El Paso, TX 79902, USA.
- Department of Metallurgical, Materials and Biomedical Engineering, M201 Engineering, University of Texas at El Paso, 500 W University Avenue, El Paso, TX 79968, USA.
- Border Biomedical Research Center, University of Texas at El Paso, 500 W University Avenue, El Paso, TX 79968, USA.
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Martín-Martín Y, Fernández-García L, Sanchez-Rebato MH, Marí-Buyé N, Rojo FJ, Pérez-Rigueiro J, Ramos M, Guinea GV, Panetsos F, González-Nieto D. Evaluation of Neurosecretome from Mesenchymal Stem Cells Encapsulated in Silk Fibroin Hydrogels. Sci Rep 2019; 9:8801. [PMID: 31217546 PMCID: PMC6584675 DOI: 10.1038/s41598-019-45238-4] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2019] [Accepted: 05/31/2019] [Indexed: 12/13/2022] Open
Abstract
Physical and cognitive disabilities are hallmarks of a variety of neurological diseases. Stem cell-based therapies are promising solutions to neuroprotect and repair the injured brain and overcome the limited capacity of the central nervous system to recover from damage. It is widely accepted that most benefits of different exogenously transplanted stem cells rely on the secretion of different factors and biomolecules that modulate inflammation, cell death and repair processes in the damaged host tissue. However, few cells survive in cerebral tissue after transplantation, diminishing the therapeutic efficacy. As general rule, cell encapsulation in natural and artificial polymers increases the in vivo engraftment of the transplanted cells. However, we have ignored the consequences of such encapsulation on the secretory activity of these cells. In this study, we investigated the biological compatibility between silk fibroin hydrogels and stem cells of mesenchymal origin, a cell population that has gained increasing attention and popularity in regenerative medicine. Although the survival of mesenchymal stem cells was not affected inside hydrogels, this biomaterial format caused adhesion and proliferation deficits and impaired secretion of several angiogenic, chemoattractant and neurogenic factors while concurrently potentiating the anti-inflammatory capacity of this cell population through a massive release of TGF-Beta-1. Our results set a milestone for the exploration of engineering polymers to modulate the secretory activity of stem cell-based therapies for neurological disorders.
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Affiliation(s)
| | | | - Miguel H Sanchez-Rebato
- Center for Biomedical Technology, Universidad Politécnica de Madrid, Madrid, Spain
- Neurocomputing and Neurorobotics Research Group: Faculty of Biology and Faculty of Optics, Universidad Complutense de Madrid., Madrid, Spain
- Brain Plasticity Group. Health Research Institute of the Hospital Clínico San Carlos (IdISSC), Madrid, Spain
- GReD, UMR CNRS 6293 - INSERM U1103 - Université Clermont Auvergne, Faculté de Medicine, Clermont-Ferrand, France
| | - Núria Marí-Buyé
- Center for Biomedical Technology, Universidad Politécnica de Madrid, Madrid, Spain
- Departamento de Ciencia de Materiales. ETSI Caminos, Canales y Puertos, Universidad Politécnica de Madrid, Madrid, Spain
- Biomedical Research Networking Center in Bioengineering Biomaterials and Nanomedicine (CIBER-BBN), Madrid, Spain
| | - Francisco J Rojo
- Center for Biomedical Technology, Universidad Politécnica de Madrid, Madrid, Spain
- Departamento de Ciencia de Materiales. ETSI Caminos, Canales y Puertos, Universidad Politécnica de Madrid, Madrid, Spain
- Biomedical Research Networking Center in Bioengineering Biomaterials and Nanomedicine (CIBER-BBN), Madrid, Spain
| | - José Pérez-Rigueiro
- Center for Biomedical Technology, Universidad Politécnica de Madrid, Madrid, Spain
- Departamento de Ciencia de Materiales. ETSI Caminos, Canales y Puertos, Universidad Politécnica de Madrid, Madrid, Spain
- Biomedical Research Networking Center in Bioengineering Biomaterials and Nanomedicine (CIBER-BBN), Madrid, Spain
| | - Milagros Ramos
- Center for Biomedical Technology, Universidad Politécnica de Madrid, Madrid, Spain
- Departamento de Tecnología Fotónica y Bioingeniería. ETSI Telecomunicaciones, Universidad Politécnica de Madrid, Madrid, Spain
- Biomedical Research Networking Center in Bioengineering Biomaterials and Nanomedicine (CIBER-BBN), Madrid, Spain
| | - Gustavo V Guinea
- Center for Biomedical Technology, Universidad Politécnica de Madrid, Madrid, Spain
- Departamento de Ciencia de Materiales. ETSI Caminos, Canales y Puertos, Universidad Politécnica de Madrid, Madrid, Spain
- Biomedical Research Networking Center in Bioengineering Biomaterials and Nanomedicine (CIBER-BBN), Madrid, Spain
| | - Fivos Panetsos
- Neurocomputing and Neurorobotics Research Group: Faculty of Biology and Faculty of Optics, Universidad Complutense de Madrid., Madrid, Spain
- Brain Plasticity Group. Health Research Institute of the Hospital Clínico San Carlos (IdISSC), Madrid, Spain
| | - Daniel González-Nieto
- Center for Biomedical Technology, Universidad Politécnica de Madrid, Madrid, Spain.
- Departamento de Tecnología Fotónica y Bioingeniería. ETSI Telecomunicaciones, Universidad Politécnica de Madrid, Madrid, Spain.
- Biomedical Research Networking Center in Bioengineering Biomaterials and Nanomedicine (CIBER-BBN), Madrid, Spain.
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Sanders KM. Spontaneous Electrical Activity and Rhythmicity in Gastrointestinal Smooth Muscles. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2019; 1124:3-46. [PMID: 31183821 PMCID: PMC7035145 DOI: 10.1007/978-981-13-5895-1_1] [Citation(s) in RCA: 37] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
The gastrointestinal (GI) tract has multifold tasks of ingesting, processing, and assimilating nutrients and disposing of wastes at appropriate times. These tasks are facilitated by several stereotypical motor patterns that build upon the intrinsic rhythmicity of the smooth muscles that generate phasic contractions in many regions of the gut. Phasic contractions result from a cyclical depolarization/repolarization cycle, known as electrical slow waves, which result from intrinsic pacemaker activity. Interstitial cells of Cajal (ICC) are electrically coupled to smooth muscle cells (SMCs) and generate and propagate pacemaker activity and slow waves. The mechanism of slow waves is dependent upon specialized conductances expressed by pacemaker ICC. The primary conductances responsible for slow waves in mice are Ano1, Ca2+-activated Cl- channels (CaCCs), and CaV3.2, T-type, voltage-dependent Ca2+ channels. Release of Ca2+ from intracellular stores in ICC appears to be the initiator of pacemaker depolarizations, activation of T-type current provides voltage-dependent Ca2+ entry into ICC, as slow waves propagate through ICC networks, and Ca2+-induced Ca2+ release and activation of Ano1 in ICC amplifies slow wave depolarizations. Slow waves conduct to coupled SMCs, and depolarization elicited by these events enhances the open-probability of L-type voltage-dependent Ca2+ channels, promotes Ca2+ entry, and initiates contraction. Phasic contractions timed by the occurrence of slow waves provide the basis for motility patterns such as gastric peristalsis and segmentation. This chapter discusses the properties of ICC and proposed mechanism of electrical rhythmicity in GI muscles.
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Affiliation(s)
- Kenton M Sanders
- Department of Physiology and Cell Biology, University of Nevada, Reno School of Medicine, Reno, NV, USA.
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