scholarly journals BoneMA – Synthesis and Characterization of a Methacrylated Bone-derived Hydrogel for Bioprinting of Vascularized Tissues

2020 ◽  
Author(s):  
S. Prakash Parthiban ◽  
Avathamsa Athirasala ◽  
Anthony Tahayeri ◽  
Reyan Abdelmoniem ◽  
Anne George ◽  
...  
Keyword(s):  
Tissue Engineering ◽  
Network Formation ◽  
Bone Matrix ◽  
Polymer Networks ◽  
Building Blocks ◽  
Human Bone ◽  
Vascular Networks ◽  
Cell Compatibility ◽  
Bone Fragments

AbstractIt has long been proposed that recapitulating the extracellular matrix (ECM) of native human tissues in the laboratory may enhance the regenerative capacity of engineered scaffolds in-vivo. Organ- and tissue-derived decellularized ECM biomaterials have been widely used for tissue repair, especially due to their intrinsic biochemical cues that can facilitate repair and regeneration. The main purpose of this study was to synthesize a new photocrosslinkable human bone-derived ECM hydrogel for bioprinting of vascularized scaffolds. To that end, we demineralized and decellularized human bone fragments to obtain a bone matrix, which was further processed and functionalized with methacrylate groups to form a photocrosslinkable methacrylate bone ECM hydrogel – BoneMA. The mechanical properties of BoneMA were tunable, with the elastic modulus increasing as a function of photocrosslinking time, while still retaining the nanoscale features of the polymer networks. The intrinsic cell-compatibility of the bone matrix ensured the synthesis of a highly cytocompatible hydrogel. The bioprinted BoneMA scaffolds supported vascularization of endothelial cells and within a day led to the formation of interconnected vascular networks. We propose that such a quick vascular network formation was due to the host of pro-angiogenic biomolecules present in the bone ECM matrix. Further, we also demonstrate the bioprintability of BoneMA in microdimensions as injectable ECM-based building blocks for microscale tissue engineering in a minimally invasive manner. We conclude that BoneMA may be a useful hydrogel system for tissue engineering and regenerative medicine.

scholarly journals A novel gelatin/chitooligosaccharide/demineralized bone matrix composite scaffold and periosteum-derived mesenchymal stem cells for bone tissue engineering

2021 ◽  
Vol 25 (1) ◽  
Author(s):  
Thakoon Thitiset ◽  
Siriporn Damrongsakkul ◽  
Supansa Yodmuang ◽  
Wilairat Leeanansaksiri ◽  
Jirun Apinun ◽  
...  
Keyword(s):  
Tissue Engineering ◽  
Stem Cells ◽  
Mesenchymal Stem Cells ◽  
Bone Formation ◽  
Bone Tissue Engineering ◽  
Bone Tissue ◽  
Demineralized Bone Matrix ◽  
Bone Matrix ◽  
Alp Activity

Abstract Background A novel biodegradable scaffold including gelatin (G), chitooligosaccharide (COS), and demineralized bone matrix (DBM) could play a significant part in bone tissue engineering. The present study aimed to investigate the biological characteristics of composite scaffolds in combination of G, COS, and DBM for in vitro cell culture and in vivo animal bioassays. Methods Three-dimensional scaffolds from the mixture of G, COS, and DBM were fabricated into 3 groups, namely, G, GC, and GCD using a lyophilization technique. The scaffolds were cultured with mesenchymal stem cells (MSCs) for 4 weeks to determine biological responses such as cell attachment and cell proliferation, alkaline phosphatase (ALP) activity, calcium deposition, cell morphology, and cell surface elemental composition. For the in vivo bioassay, G, GC, and GCD, acellular scaffolds were implanted subcutaneously in 8-week-old male Wistar rats for 4 weeks and 8 weeks. The explants were assessed for new bone formation using hematoxylin and eosin (H&E) staining and von Kossa staining. Results The MSCs could attach and proliferate on all three groups of scaffolds. Interestingly, the ALP activity of MSCs reached the greatest value on day 7 after cultured on the scaffolds, whereas the calcium assay displayed the highest level of calcium in MSCs on day 28. Furthermore, weight percentages of calcium and phosphorus on the surface of MSCs after cultivation on the GCD scaffolds increased when compared to those on other scaffolds. The scanning electron microscopy images showed that MSCs attached and proliferated on the scaffold surface thoroughly over the cultivation time. Mineral crystal aggregation was evident in GC and greatly in GCD scaffolds. H&E staining illustrated that G, GC, and GCD scaffolds displayed osteoid after 4 weeks of implantation and von Kossa staining confirmed the mineralization at 8 weeks in G, GC, and GCD scaffolds. Conclusion The MSCs cultured in GCD scaffolds revealed greater osteogenic differentiation than those cultured in G and GC scaffolds. Additionally, the G, GC, and GCD scaffolds could promote in vivo ectopic bone formation in rat model. The GCD scaffolds exhibited maximum osteoinductive capability compared with others and may be potentially used for bone regeneration.

scholarly journals Patterning Vascular Networks In Vivo for Tissue Engineering Applications

2015 ◽  
Vol 21 (5) ◽  
pp. 509-517 ◽  
Author(s):  
Ritika R. Chaturvedi ◽  
Kelly R. Stevens ◽  
Ricardo D. Solorzano ◽  
Robert E. Schwartz ◽  
Jeroen Eyckmans ◽  
...  
Keyword(s):  
Tissue Engineering ◽  
Vascular Networks ◽  
Engineering Applications

Nanocomposite injectable gels capable of self-replenishing regenerative extracellular microenvironments for in vivo tissue engineering

2018 ◽  
Vol 6 (3) ◽  
pp. 550-561 ◽  
Author(s):  
Koji Nagahama ◽  
Naho Oyama ◽  
Kimika Ono ◽  
Atsushi Hotta ◽  
Keiko Kawauchi ◽  
...  
Keyword(s):  
Tissue Engineering ◽  
Building Blocks ◽  
The Body ◽  
Bioactive Molecules ◽  
In Vivo Tissue Engineering ◽  
Injectable Gels

Nanocomposite injectable gels, which self-replenish regenerative extracellular microenvironments within the gels in the body by utilizing host-derived bioactive molecules as building blocks, are reported.

scholarly journals Implantation and maintenance of functional human bone marrow in SCID-hu mice

Blood ◽  
1992 ◽  
Vol 79 (7) ◽  
pp. 1704-1711 ◽  
Author(s):  
S Kyoizumi ◽  
CM Baum ◽  
H Kaneshima ◽  
JM McCune ◽  
EJ Yee ◽  
...  
Keyword(s):  
Bone Marrow ◽  
Cell Activity ◽  
Direct Analysis ◽  
Human Bone ◽  
Human Bone Marrow ◽  
Multilineage Differentiation ◽  
Bone Implants ◽  
Human Erythropoietin ◽  
Bone Fragments

Abstract Human fetal bone fragments implanted in the immunodeficient C.B-17 scid/scid (SCID) mouse were shown to sustain active human hematopoiesis in vivo. Human progenitor cell activity was maintained for as long as 20 weeks after implantation and was associated with multilineage differentiation in the engrafted bone. Thus, the bone implants provided stem cells as well as the microenvironment requisite for their long- term maintenance and multilineage differentiation. Administration of human erythropoietin (Epo) stimulated human erythropoiesis in human bone implants. This animal model may facilitate direct analysis of a wide variety of physiologic and pathologic conditions of human bone marrow (BM) in vivo.

scholarly journals Application of XRF to Measure Strontium in Human Bone In Vivo

1982 ◽  
Vol 26 ◽  
pp. 415-421 ◽  
Author(s):  
L. Wielopolski ◽  
D. Vartsky ◽  
S. Yasumura ◽  
S.H. Cohn
Keyword(s):  
Human Body ◽  
Alkaline Earth ◽  
Sea Water ◽  
Bone Matrix ◽  
Human Bone ◽  
Radiation Hazard ◽  
Exact Role ◽  
Metabolic Behavior

Strontium appears in the earth's crust at a concentration of about 400 ppm and in sea water about 8,1 ppm. Consequently, all living forms have evolved in the presence of this alkaline earth and have incorporated it in their tissues. The exact role of Sr in the human body remains ambiguous (1), even though Sr has been extensively studied with reference to the radiation hazard from 90Sr (2).Metabolic behavior of Sr, in some aspects, is similar to that of Ca (3), but substantial dissimilarities between these two are also well recognized (1,4). It has been suggested that Sr stimulates the formation of bone matrix. At higher concentrations, however, it interferes with calcification mechanism of the bone matrix (5).

scholarly journals Comparing Three Different Three-dimensional Scaffolds for Bone Tissue Engineering: An in vivo Study

2015 ◽  
Vol 16 (1) ◽  
pp. 25-30 ◽  
Author(s):  
Saeid Nosouhian ◽  
Amin Davoudi ◽  
Mansour Rismanchian ◽  
Sayed Mohammad Razavi ◽  
Hamidreza Sadeghiyan
Keyword(s):  
Tissue Engineering ◽  
Bone Tissue Engineering ◽  
Bone Tissue ◽  
Demineralized Bone Matrix ◽  
Bone Matrix ◽  
Three Dimensional ◽  
Control Group ◽  
Lamellar Bone ◽  
Significant Difference

ABSTRACT Introduction Three-dimensional Scaffold structure of synthetic biomaterials with their interconnected spaces seem to be a safe and effective option in supporting bone regeneration. The aim of this animal study was to compare the effectiveness of three different biocompatible scaffolds: bioglass (BG), demineralized bone matrix (DBM) and forstrite (FR). Materials and methods Four healthy dogs were anesthetized and the first to fourth premolars were extracted atraumatically in each quadrant. After healing, linear incision was prepared from molar to anterior segment and 4 defects in each quadrant (16 defects in each dog) were prepared. Scaffold blocks of BG, DBM and FR were resized according to size of defects and placed in the 12 defects randomly, 4 defects remained as control group. The dogs were sacrificed in 4 time intervals (15, 30, 45 and 60 days after) and the percentage of different types of regenerated bones (lamellar and woven) and connective tissue were recorded in histological process. The data were analyzed by one-way ANOVA and post hoc using SPSS software Ver. 15 at significant level of 0.05. Results In day 30th, although the amount of regenerated lamellar bone in control, DBM and BG Scaffold (22.37 ± 3.44; 21.46 ± 1.96; 21.21 ± 0.96) were near to each, the FR Scaffold provided the highest amount of lamellar (29.71 ± 7.94) and woven bone (18.28 ± 2.35). Also, FR Scaffold showed significant difference with BG (p = 0.026) and DBM Scaffolds (p = 0.032) in regenerated lamellar bone. Conclusion We recommend paying more attention to FR Scaffold as a biomaterial, but it is better to be compared with other nano biomaterials in future studies. How to cite this article Rismanchian M, Nosouhian S, Razavi SM, Davoudi A, Sadeghiyan H. Comparing Three Different Threedimensional Scaffolds for Bone Tissue Engineering: An in vivo Study. J Contemp Dent Pract 2015;16(1):25-30.

scholarly journals Recent Advancements in 3D Printing and Bioprinting Methods for Cardiovascular Tissue Engineering

2021 ◽  
Vol 8 (10) ◽  
pp. 133
Author(s):  
Foteini K. Kozaniti ◽  
Despoina Nektaria Metsiou ◽  
Aikaterini E. Manara ◽  
George Athanassiou ◽  
Despina D. Deligianni
Keyword(s):  
Tissue Engineering ◽  
Cardiovascular Diseases ◽  
3D Printing ◽  
Cell Viability ◽  
Extracellular Matrices ◽  
Vascular Networks ◽  
Cardiac Valves ◽  
Cytotoxic Effects ◽  
Cardiovascular Tissue

Recent decades have seen a plethora of regenerating new tissues in order to treat a multitude of cardiovascular diseases. Autografts, xenografts and bioengineered extracellular matrices have been employed in this endeavor. However, current limitations of xenografts and exogenous scaffolds to acquire sustainable cell viability, anti-inflammatory and non-cytotoxic effects with anti-thrombogenic properties underline the requirement for alternative bioengineered scaffolds. Herein, we sought to encompass the methods of biofabricated scaffolds via 3D printing and bioprinting, the biomaterials and bioinks recruited to create biomimicked tissues of cardiac valves and vascular networks. Experimental and computational designing approaches have also been included. Moreover, the in vivo applications of the latest studies on the treatment of cardiovascular diseases have been compiled and rigorously discussed.

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