scholarly journals Tissue-Engineered Grafts from Human Decellularized Extracellular Matrices: A Systematic Review and Future Perspectives

2018 ◽  
Vol 19 (12) ◽  
pp. 4117 ◽  
Author(s):  
Andrea Porzionato ◽  
Elena Stocco ◽  
Silvia Barbon ◽  
Francesca Grandi ◽  
Veronica Macchi ◽  
...  
Keyword(s):  
Tissue Engineering ◽  
Peripheral Nerves ◽  
Dental Pulp ◽  
Cell Types ◽  
Human Tissues ◽  
Future Perspectives ◽  
Functional Aspects ◽  
Body Donation

Tissue engineering and regenerative medicine involve many different artificial and biologic materials, frequently integrated in composite scaffolds, which can be repopulated with various cell types. One of the most promising scaffolds is decellularized allogeneic extracellular matrix (ECM) then recellularized by autologous or stem cells, in order to develop fully personalized clinical approaches. Decellularization protocols have to efficiently remove immunogenic cellular materials, maintaining the nonimmunogenic ECM, which is endowed with specific inductive/differentiating actions due to its architecture and bioactive factors. In the present paper, we review the available literature about the development of grafts from decellularized human tissues/organs. Human tissues may be obtained not only from surgery but also from cadavers, suggesting possible development of Human Tissue BioBanks from body donation programs. Many human tissues/organs have been decellularized for tissue engineering purposes, such as cartilage, bone, skeletal muscle, tendons, adipose tissue, heart, vessels, lung, dental pulp, intestine, liver, pancreas, kidney, gonads, uterus, childbirth products, cornea, and peripheral nerves. In vitro recellularizations have been reported with various cell types and procedures (seeding, injection, and perfusion). Conversely, studies about in vivo behaviour are poorly represented. Actually, the future challenge will be the development of human grafts to be implanted fully restored in all their structural/functional aspects.

Tough Double-Network Hydrogels as Scaffolds for Tissue Engineering

2012 ◽  
pp. 213-222
Author(s):  
Jing Jing Yang ◽  
Jian Fang Liu ◽  
Takayuki Kurokawa ◽  
Nobuto Kitamura ◽  
Kazunori Yasuda ◽  
...  
Keyword(s):  
Tissue Engineering ◽  
Three Dimensional ◽  
Cartilage Regeneration ◽  
Cell Types ◽  
Embryoid Bodies ◽  
Living Tissue ◽  
Double Network ◽  
Dimensional Network

Hydrogels are used as scaffolds for tissue engineering in vitro & in vivo because their three-dimensional network structure and viscoelasticity are similar to those of the macromolecular-based extracellular matrix (ECM) in living tissue. Especially, the synthetic hydrogels with controllable and reproducible properties were used as scaffolds to study the behaviors of cells in vitro and implanted test in vivo. In this review, two different structurally designed hydrogels, single-network (SN) hydrogels and double-network (DN) hydrogels, were used as scaffolds. The behavior of two cell types, anchorage-dependent cells and anchorage-independent cells, and the differentiation behaviors of embryoid bodies (EBs) were investigated on these hydrogels. Furthermore, the behavior of chondrocytes on DN hydrogels in vitro and the spontaneous cartilage regeneration induced by DN hydrogels in vivo was examined.

scholarly journals Tissue engineering for compensating short bowel syndrome

2018 ◽  
Vol 20 (2) ◽  
pp. 259-264
Author(s):  
A V Kosulin ◽  
L N Beldiman ◽  
S V Kromsky ◽  
A A Kokorina ◽  
E V Mikhailova ◽  
...  
Keyword(s):  
Tissue Engineering ◽  
Small Intestine ◽  
Short Bowel Syndrome ◽  
Mechanical Stability ◽  
Clinical Problem ◽  
Cell Types ◽  
Short Bowel ◽  
Wide Range

Short bowel syndrome is an important clinical problem characterized by a high incidence of serious complications, deaths and socioeconomic consequences. Parenteral nutrition provides only a temporary solution without reducing the risk of complications. This applies equally to surgical treatment, in particular to small intestine transplantation and related concomitant interventions, which only facilitate the adaptation of the intestine to new conditions. Potential approaches have been analyzed in the treatment of the syndrome of the small intestine, which can be offered by dynamically developing tissue engineering. Various types of carriers and cell types that are used in experiments for obtaining tissue engineering designs of the intestine are discussed. A wide range of variants of such constructions is analyzed that can lead to obtaining an organ prosthesis with a cellular organization and mechanical stability similar to those of the native small intestine, which will ensure the necessary biocompatibility. It is established that one of the optimal carriers for today are extracellular matrices obtained by decellularization of the native small intestine. This process allows to preserve the microarchitecture of the small intestine, which greatly facilitates the process of filling the matrix with cells both in vitro and in vivo. It has also been established that mesenchymal stromal multipotent cells and organoid units obtained from the tissue of the native small intestine are particularly prominent among the most promising participants in the cellular ensemble.

scholarly journals Vasculogenesis Potential of Mesenchymal and Endothelial Stem Cells Isolated from Various Human Tissues

2016 ◽  
Author(s):  
Rokhsareh Rohban ◽  
Nathalie Etchart ◽  
Thomas R. Pieber
Keyword(s):  
Stem Cells ◽  
Umbilical Cord ◽  
Adult Stem Cell ◽  
Cell Types ◽  
Human Tissues ◽  
Vessel Formation ◽  
Nsg Mice ◽  
Variable Capacity

AbstractNeo vessel formation can be initiated by co-transplantation of mesenchymal stem cells (MSC) with endothelial colony-forming cells (ECFC). The two adult stem cell types can be isolated and expanded from a variety of tissues to be used for regenerative applications pro-angiogenesis.Here we performed a systematic study to evaluate the neo-vasculogenesis potential of MSC and ECFC isolated from various human tissues. MSC were isolated, purified and expanded in vitro from umbilical cord (UC) and umbilical cord blood (UCB), white adipose tissue (WAT), bone marrow (BM), and amniotic membrane of placenta (AMN).ECFC were isolated from UC and UCB, WAT and peripheral blood (PB). ECFC and MSC and were co-transplanted admixed with extracellular matrix (Matrigel®) at a ratio of 5:1 to immune-deficient NSG mice, subcutaneously. The transplants were harvested after two weeks and the state of vessel formation and stability in the explants were investigated using immune-histochemical methods. The number of created micro-vessels was quantified using Hematoxylin & Eosin (H&E) staining followed by image J quantification.Results showed that ECFC and MSC possess variable capacity in contributing to neo-vasculogenesis. WAT and UCB-derived ECFC and WAT, UCB and BM-derived MSC are most potent cells in terms of neo-vessel formation in vivo. UC-derived ECFC and AMN-derived MSC have been shown to be least potent in contributing to neo-vasculogenesis. This variability might be due to variable phenotypes, or different genetic profiles of MSC and ECFC isolated from different tissues and/or donors.The findings might give an insight into better regenerative strategies for neo-vessel formation in vivo.

scholarly journals Multimodal/Multifunctional Nanomaterials in (Bio)electrochemistry: Now and in the Coming Decade

Nanomaterials ◽  
2020 ◽  
Vol 10 (12) ◽  
pp. 2556
Author(s):  
Paloma Yáñez-Sedeño ◽  
Araceli González-Cortés ◽  
Susana Campuzano ◽  
José Manuel Pingarrón
Keyword(s):  
Tissue Engineering ◽  
Targeted Delivery ◽  
Review Article ◽  
Combined Effect ◽  
Future Perspectives ◽  
Electrochemical Biosensing ◽  
Multifunctional Nanomaterials ◽  
Improved Performance

Multifunctional nanomaterials, defined as those able to achieve a combined effect or more than one function through their multiple functionalization or combination with other materials, are gaining increasing attention in the last years in many relevant fields, including cargo targeted delivery, tissue engineering, in vitro and/or in vivo diseases imaging and therapy, as well as in the development of electrochemical (bio)sensors and (bio)sensing strategies with improved performance. This review article aims to provide an updated overview of the important advances and future opportunities exhibited by electrochemical biosensing in connection to multifunctional nanomaterials. Accordingly, representative aspects of recent approaches involving metal, carbon, and silica-based multifunctional nanomaterials are selected and critically discussed, as they are the most widely used multifunctional nanomaterials imparting unique capabilities in (bio)electroanalysis. A brief overview of the main remaining challenges and future perspectives in the field is also provided.

scholarly journals Homemade Bread: Repurposing an Ancient Technology for Low Cost in vitro Tissue Engineering

2020 ◽  
Author(s):  
Jessica T. Holmes ◽  
Ziba Jaberansari ◽  
William Collins ◽  
Maxime Leblanc Latour ◽  
Daniel J. Modulevsky ◽  
...  
Keyword(s):  
Tissue Engineering ◽  
Mammalian Cells ◽  
Mechanical Stability ◽  
Low Cost ◽  
Cell Types ◽  
Meat Industry ◽  
High Porosity ◽  
3D Microenvironment

ABSTRACTCellular function is well known to be influenced by the physical cues and architecture of their three dimensional (3D) microenvironment. As such, numerous synthetic and naturally-occurring biomaterials have been developed to provide such architectures to support the proliferation of mammalian cells in vitro and in vivo. In recent years, our group, and others, have shown that scaffolds derived from plants can be utilized for tissue engineering applications in biomedicine and in the burgeoning cultured meat industry. Such scaffolds are straightforward to prepare, allowing researchers to take advantage of their intrinsic 3D microarchitectures. During the 2020 SARS-CoV-2 pandemic many people around the world began to rediscover the joy of preparing bread at home and as a research group, our members participated in this trend. Having observed the high porosity of the crumb (the internal portion of the bread) we were inspired to investigate whether it might support the proliferation of mammalian cells in vitro. Here, we develop and validate a yeast-free “soda bread” that maintains its mechanical stability over two weeks in culture conditions. The scaffolding is highly porous, allowing the 3D proliferation of multiple cell types relevant to both biomedical tissue engineering and the development of novel future foods. Bread derived scaffolds are highly scalable and represent a surprising new alternative to synthetic or animal-derived scaffolds for addressing a diverse variety of tissue engineering challenges.

scholarly journals Polyelectrolyte Multilayer Capsule (PEMC)-Based Scaffolds for Tissue Engineering

Micromachines ◽  
2020 ◽  
Vol 11 (9) ◽  
pp. 797
Author(s):  
Georgia Kastania ◽  
Jack Campbell ◽  
Jacob Mitford ◽  
Dmitry Volodkin
Keyword(s):  
Tissue Engineering ◽  
Drug Testing ◽  
Tissue Growth ◽  
Future Perspectives ◽  
Polyelectrolyte Multilayer ◽  
Advantages And Disadvantages ◽  
Cellular Behaviour ◽  
Straightforward Approach

Tissue engineering (TE) is a highly multidisciplinary field that focuses on novel regenerative treatments and seeks to tackle problems relating to tissue growth both in vitro and in vivo. These issues currently involve the replacement and regeneration of defective tissues, as well as drug testing and other related bioapplications. The key approach in TE is to employ artificial structures (scaffolds) to support tissue development; these constructs should be capable of hosting, protecting and releasing bioactives that guide cellular behaviour. A straightforward approach to integrating bioactives into the scaffolds is discussed utilising polyelectrolyte multilayer capsules (PEMCs). Herein, this review illustrates the recent progress in the use of CaCO3 vaterite-templated PEMCs for the fabrication of functional scaffolds for TE applications, including bone TE as one of the main targets of PEMCs. Approaches for PEMC integration into scaffolds is addressed, taking into account the formulation, advantages, and disadvantages of such PEMCs, together with future perspectives of such architectures.

scholarly journals Physical and Biological Properties of a Chitosan Hydrogel Scaffold Associated to Photobiomodulation Therapy for Dental Pulp Regeneration: An In Vitro and In Vivo Study

2021 ◽  
Vol 2021 ◽  
pp. 1-10
Author(s):  
Maria Stella Moreira ◽  
Giovanna Sarra ◽  
Giovanna Lopes Carvalho ◽  
Flavia Gonçalves ◽  
Hector Valentin Caballero-Flores ◽  
...  
Keyword(s):  
Tissue Engineering ◽  
Stem Cells ◽  
Energy Density ◽  
Dental Pulp ◽  
Blood Clot ◽  
Chitosan Hydrogel ◽  
Pulp Regeneration ◽  
Cell Homing

Background. The regeneration of dental pulp, especially in cases of pulp death of immature teeth, is the goal of the regenerative endodontic procedures (REPs) that are based on tissue engineering principles, consisting of stem cells, growth factors, and scaffolds. Photobiomodulation therapy (PBMT) showed to improve dental pulp regeneration through cell homing approaches in preclinical studies and has been proposed as the fourth element of tissue engineering. However, when a blood clot was used as a scaffold in one of these previous studies, only 30% of success was achieved. The authors pointed out the instability of the blood clot as the regeneration shortcoming. Then, to circumvent this problem, a new scaffold was developed to be applied with the blood clot. The hypothesis of the present study was that an experimental injectable chitosan hydrogel would facilitate the three-dimensional spatial organization of endogenous stem cells in dental pulp regeneration with no interference on the positive influence of PBMT. Methods. For the in vitro analysis, stem cells from the apical papilla (SCAPs) were characterized by flow cytometry and applied in the chitosan scaffold for evaluating adhesion, migration, and proliferation. For the in vivo analysis, the chitosan scaffold was applied in a rodent orthotopic dental pulp regeneration model under the influence of PBMT (660 nm; power output of 20 mW, beam area of 0.028 cm2, and energy density of 5 J/cm2). Results. The scaffold tested in this study allowed significantly higher viability, proliferation, and migration of SCAPs in vitro when PBMT was applied, especially with the energy density of 5 J/cm2. These results were in consonance to those of the in vivo data, where pulp-like tissue formation was observed inside the root canal. Conclusion. Chitosan hydrogel when applied with a blood clot and PBMT could in the future improve previous results of dental pulp regeneration through cell homing approaches.

scholarly journals In Vivo Articular Cartilage Regeneration Using Human Dental Pulp Stem Cells Cultured in an Alginate Scaffold: A Preliminary Study

2017 ◽  
Vol 2017 ◽  
pp. 1-9 ◽  
Author(s):  
Manuel Mata ◽  
Lara Milian ◽  
Maria Oliver ◽  
Javier Zurriaga ◽  
Maria Sancho-Tello ◽  
...  
Keyword(s):  
Stem Cells ◽  
Articular Cartilage ◽  
Dental Pulp ◽  
Cartilage Regeneration ◽  
Cell Types ◽  
Dental Pulp Stem Cells ◽  
The Poor ◽  
Human Dental Pulp

Osteoarthritis is an inflammatory disease in which all joint-related elements, articular cartilage in particular, are affected. The poor regeneration capacity of this tissue together with the lack of pharmacological treatment has led to the development of regenerative medicine methodologies including microfracture and autologous chondrocyte implantation (ACI). The effectiveness of ACI has been shown in vitro and in vivo, but the use of other cell types, including bone marrow and adipose-derived mesenchymal stem cells, is necessary because of the poor proliferation rate of isolated articular chondrocytes. In this investigation, we assessed the chondrogenic ability of human dental pulp stem cells (hDPSCs) to regenerate cartilage in vitro and in vivo. hDPSCs and primary isolated rabbit chondrocytes were cultured in chondrogenic culture medium and found to express collagen II and aggrecan. Both cell types were cultured in 3% alginate hydrogels and implanted in a rabbit model of cartilage damage. Three months after surgery, significant cartilage regeneration was observed, particularly in the animals implanted with hDPSCs. Although the results presented here are preliminary, they suggest that hDPSCs may be useful for regeneration of articular cartilage.

scholarly journals The emerging field of pancreatic tissue engineering: A systematic review and evidence map of scaffold materials and scaffolding techniques for insulin-secreting cells

2019 ◽  
Vol 10 ◽  
pp. 204173141988470 ◽  
Author(s):  
Gabriel Alexander Salg ◽  
Nathalia A Giese ◽  
Miriam Schenk ◽  
Felix J Hüttner ◽  
Klaus Felix ◽  
...  
Keyword(s):  
Systematic Review ◽  
Tissue Engineering ◽  
Treatment Options ◽  
Cell Types ◽  
Pancreatic Tissue ◽  
Evidence Map ◽  
Insulin Secreting Cells ◽  
Scaffold Materials

A bioartificial endocrine pancreas is proposed as a future alternative to current treatment options. Patients with insulin-secretion deficiency might benefit. This is the first systematic review that provides an overview of scaffold materials and techniques for insulin-secreting cells or cells to be differentiated into insulin-secreting cells. An electronic literature survey was conducted in PubMed/MEDLINE and Web of Science, limited to the past 10 years. A total of 197 articles investigating 60 different materials met the inclusion criteria. The extracted data on materials, cell types, study design, and transplantation sites were plotted into two evidence gap maps. Integral parts of the tissue engineering network such as fabrication technique, extracellular matrix, vascularization, immunoprotection, suitable transplantation sites, and the use of stem cells are highlighted. This systematic review provides an evidence-based structure for future studies. Accumulating evidence shows that scaffold-based tissue engineering can enhance the viability and function or differentiation of insulin-secreting cells both in vitro and in vivo.

Ultrastructural observations on the in vitro cytoadherence of Plasmodium falciparum infected red blood cells

1990 ◽  
Vol 48 (3) ◽  
pp. 914-915
Author(s):  
D.J.P. Ferguson ◽  
A.R. Berendt ◽  
J. Tansey ◽  
K. Marsh ◽  
C.I. Newbold
Keyword(s):  
Plasmodium Falciparum ◽  
Red Blood Cells ◽  
Blood Cells ◽  
Umbilical Vein ◽  
Cell Types ◽  
Amelanotic Melanoma ◽  
Cytoplasmic Process ◽  
Umbilical Vein Endothelial Cells

In human malaria, the most serious clinical manifestation is cerebral malaria (CM) due to infection with Plasmodium falciparum. The pathology of CM is thought to relate to the fact that red blood cells containing mature forms of the parasite (PRBC) cytoadhere or sequester to post capillary venules of various tissues including the brain. This in vivo phenomenon has been studied in vitro by examining the cytoadherence of PRBCs to various cell types and purified proteins. To date, three Ijiost receptor molecules have been identified; CD36, ICAM-1 and thrombospondin. The specific changes in the PRBC membrane which mediate cytoadherence are less well understood, but they include the sub-membranous deposition of electron-dense material resulting in surface deformations called knobs. Knobs were thought to be essential for cytoadherence, lput recent work has shown that certain knob-negative (K-) lines can cytoadhere. In the present study, we have used electron microscopy to re-examine the interactions between K+ PRBCs and both C32 amelanotic melanoma cells and human umbilical vein endothelial cells (HUVEC).We confirm previous data demonstrating that C32 cells possess numerous microvilli which adhere to the PRBC, mainly via the knobs (Fig. 1). In contrast, the HUVEC were relatively smooth and the PRBCs appeared partially flattened onto the cell surface (Fig. 2). Furthermore, many of the PRBCs exhibited an invagination of the limiting membrane in the attachment zone, often containing a cytoplasmic process from the endothelial cell (Fig. 2).

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