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Journal ArticleDOI: 10.1016/J.MSEC.2021.112013

Recent advances in bioprinting technologies for engineering hepatic tissue.

05 Mar 2021-Materials Science and Engineering: C (Elsevier BV)-Vol. 123, pp 112013-112013
Abstract: In the sphere of liver tissue engineering (LTE), 3D bioprinting has emerged as an effective technology to mimic the complex in vivo hepatic microenvironment, enabling the development of functional 3D constructs with potential application in the healthcare and diagnostic sector. This review gears off with a note on the liver's microscopic 3D architecture and pathologies linked to liver injury. The write-up is then directed towards unmasking recent advancements and prospects of bioprinting for recapitulating 3D hepatic structure and function. The article further introduces available stem cell opportunities and different strategies for their directed differentiation towards various hepatic stem cell types, including hepatocytes, hepatic sinusoidal endothelial cells, stellate cells, and Kupffer cells. Another thrust of the article is on understanding the dynamic interplay of different hepatic cells with various microenvironmental cues, which is crucial for controlling differentiation, maturation, and maintenance of functional hepatic cell phenotype. On a concluding note, various critical issues and future research direction towards clinical translation of bioprinted hepatic constructs are discussed.

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6 results found

Open accessJournal ArticleDOI: 10.1002/ADFM.202104148
Abstract: Excessive and unwarranted administration of antibiotics has invigorated the evolution of multidrug-resistant microbes. There is, therefore, an urgent need for advanced active compounds. Ionic liquids with short-lived ion-pair structures are highly tunable and have diverse applications. Apart from their unique physicochemical features, the newly discovered biological activities of ionic liquids have fascinated biochemists, microbiologists, and medical scientists. In particular, their antimicrobial properties have opened new vistas in overcoming the current challenges associated with combating antibiotic-resistant pathogens. Discussions regarding ionic liquid derivatives in monomeric and polymeric forms with antimicrobial activities are presented here. The antimicrobial mechanism of ionic liquids and parameters that affect their antimicrobial activities, such as chain length, cation/anion type, cation density, and polymerization, are considered. The potential applications of ionic liquids in the biomedical arena, including regenerative medicine, biosensing, and drug/biomolecule delivery, are presented to stimulate the scientific community to further improve the antimicrobial efficacy of ionic liquids.

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Topics: Ionic liquid (51%)

5 Citations

Journal ArticleDOI: 10.1016/J.APMT.2021.101107
Pooyan Makvandi1, Atefeh Zarepour2, Xuan-Qi Zheng3, Tarun Agarwal4  +12 moreInstitutions (10)
Abstract: Non-spherical metal nanomaterials such as noble metal or transition metal dichalcogenides and MXenes have been employed in different biomedical facets. Because the biological properties of these nanocompounds are governed by their architecture and composition, such factors should be considered prior to their adoption for clinical use. The architecture of metal-based nanomaterials affects cell viability by virtue of the variable geometry of these nanomaterials as well as their physicochemical interactions with mammalian cell membranes. In the present review, the effects of parameters such as interfacial interaction and aspect ratio on cellular uptake of non-spherical metallic nanomaterials will be discussed. The application of these nanomaterials as biosensors, in cancer diagnosis and therapy, tissue engineering and regenerative medicine will also be thoroughly reviewed.

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Topics: Nanomedicine (53%), MXenes (52%), Nanomaterials (51%)

4 Citations

Open accessJournal ArticleDOI: 10.1016/J.BEA.2021.100005
01 Jun 2021-
Abstract: Adequate oxygen tension has been associated with better tissue regeneration and reversal of tumor cells' resistance against various therapeutic modalities. Over the past two decades, an enormous amount of efforts have been made to develop strategies and materials that could actively generate oxygen to contrast local hypoxia at injury or tumor site. In this context, the current research trend is exploring photosynthetic microorganisms as a continuous oxygenation source. This concise review provides a brief overview of recent developments made with photosynthetic microbes, ascertaining their therapeutic capabilities in tissue engineering and anticancer therapy.

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Topics: Oxygen tension (61%)

2 Citations

Open accessJournal ArticleDOI: 10.1016/J.BEA.2021.100018
01 Dec 2021-
Abstract: 3D printing technologies are rapidly revolutionizing all manufacturing sectors due to their ability to create objects with complex geometries in a reproducible and automated manner using material/cell-based formulations, precisely termed printing inks. In this regard, pectin, a naturally occurring plant polysaccharide, has been proposed as a potential component of ink formulations. In this mini-review, we overview the most recent advances made with pectin-based inks in the fields of tissue engineering and food manufacturing. We also discuss various strategies used to formulate 3D printable pectin inks. Finally, various challenges and prospects for future development are discussed.

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1 Citations

Journal ArticleDOI: 10.1016/J.APMT.2021.101117
Abstract: Polypyrrole is an example of inherently electrically conductive polymer that is employed in the biomedical arena because of its low cost, excellent electroconductive properties, and good biocompatibility. Because many body tissues respond to electrical fields, polypyrrole-based nanocomposites have become an important class of bio-conductive material. Nanocomposites prepared by blending polypyrrole with other biopolymers or nanomaterials show marked improvements in physicochemical, mechanical, and biological properties. The present review outlines the structure and synthesis of polypyrrole, as well as the physical and mechanical properties of polypyrrole-containing nanocomposites. The antimicrobial and antioxidant activities and possible cytotoxicity of these nanocomposites are summarized and critiqued. A survey of the biomedical applications of polypyrrole as biosensors, drug delivery systems, tissue engineering scaffolds, or photo-thermal therapeutic agents is presented to spur further advances in this exciting field of research.

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Topics: Polypyrrole (58%)

1 Citations


290 results found

Journal ArticleDOI: 10.1161/CIR.0000000000000659
05 Mar 2019-Circulation
Abstract: March 5, 2019 e1 WRITING GROUP MEMBERS Emelia J. Benjamin, MD, ScM, FAHA, Chair Paul Muntner, PhD, MHS, FAHA, Vice Chair Alvaro Alonso, MD, PhD, FAHA Marcio S. Bittencourt, MD, PhD, MPH Clifton W. Callaway, MD, FAHA April P. Carson, PhD, MSPH, FAHA Alanna M. Chamberlain, PhD Alexander R. Chang, MD, MS Susan Cheng, MD, MMSc, MPH, FAHA Sandeep R. Das, MD, MPH, MBA, FAHA Francesca N. Delling, MD, MPH Luc Djousse, MD, ScD, MPH Mitchell S.V. Elkind, MD, MS, FAHA Jane F. Ferguson, PhD, FAHA Myriam Fornage, PhD, FAHA Lori Chaffin Jordan, MD, PhD, FAHA Sadiya S. Khan, MD, MSc Brett M. Kissela, MD, MS Kristen L. Knutson, PhD Tak W. Kwan, MD, FAHA Daniel T. Lackland, DrPH, FAHA Tené T. Lewis, PhD Judith H. Lichtman, PhD, MPH, FAHA Chris T. Longenecker, MD Matthew Shane Loop, PhD Pamela L. Lutsey, PhD, MPH, FAHA Seth S. Martin, MD, MHS, FAHA Kunihiro Matsushita, MD, PhD, FAHA Andrew E. Moran, MD, MPH, FAHA Michael E. Mussolino, PhD, FAHA Martin O’Flaherty, MD, MSc, PhD Ambarish Pandey, MD, MSCS Amanda M. Perak, MD, MS Wayne D. Rosamond, PhD, MS, FAHA Gregory A. Roth, MD, MPH, FAHA Uchechukwu K.A. Sampson, MD, MBA, MPH, FAHA Gary M. Satou, MD, FAHA Emily B. Schroeder, MD, PhD, FAHA Svati H. Shah, MD, MHS, FAHA Nicole L. Spartano, PhD Andrew Stokes, PhD David L. Tirschwell, MD, MS, MSc, FAHA Connie W. Tsao, MD, MPH, Vice Chair Elect Mintu P. Turakhia, MD, MAS, FAHA Lisa B. VanWagner, MD, MSc, FAST John T. Wilkins, MD, MS, FAHA Sally S. Wong, PhD, RD, CDN, FAHA Salim S. Virani, MD, PhD, FAHA, Chair Elect On behalf of the American Heart Association Council on Epidemiology and Prevention Statistics Committee and Stroke Statistics Subcommittee

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Topics: Heart disease (60%), Stroke (60%), Epidemiology (51%)

3,812 Citations

Journal ArticleDOI: 10.1038/NBT.2958
Sean V. Murphy1, Anthony Atala1Institutions (1)
Abstract: Additive manufacturing, otherwise known as three-dimensional (3D) printing, is driving major innovations in many areas, such as engineering, manufacturing, art, education and medicine. Recent advances have enabled 3D printing of biocompatible materials, cells and supporting components into complex 3D functional living tissues. 3D bioprinting is being applied to regenerative medicine to address the need for tissues and organs suitable for transplantation. Compared with non-biological printing, 3D bioprinting involves additional complexities, such as the choice of materials, cell types, growth and differentiation factors, and technical challenges related to the sensitivities of living cells and the construction of tissues. Addressing these complexities requires the integration of technologies from the fields of engineering, biomaterials science, cell biology, physics and medicine. 3D bioprinting has already been used for the generation and transplantation of several tissues, including multilayered skin, bone, vascular grafts, tracheal splints, heart tissue and cartilaginous structures. Other applications include developing high-throughput 3D-bioprinted tissue models for research, drug discovery and toxicology.

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Topics: 3D bioprinting (79%), Transplantation (55%), Regenerative medicine (55%)

3,757 Citations

Open accessJournal ArticleDOI: 10.1126/SCIENCE.1164680
03 Apr 2009-Science
Abstract: It has been difficult to establish whether we are limited to the heart muscle cells we are born with or if cardiomyocytes are generated also later in life. We have taken advantage of the integration of carbon-14, generated by nuclear bomb tests during the Cold War, into DNA to establish the age of cardiomyocytes in humans. We report that cardiomyocytes renew, with a gradual decrease from 1% turning over annually at the age of 25 to 0.45% at the age of 75. Fewer than 50% of cardiomyocytes are exchanged during a normal life span. The capacity to generate cardiomyocytes in the adult human heart suggests that it may be rational to work toward the development of therapeutic strategies aimed at stimulating this process in cardiac pathologies.

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2,504 Citations

Open accessJournal ArticleDOI: 10.1016/S1369-7021(11)70058-X
Fergal J. O'Brien1Institutions (1)
01 Mar 2011-Materials Today
Abstract: Every day thousands of surgical procedures are performed to replace or repair tissue that has been damaged through disease or trauma. The developing field of tissue engineering (TE) aims to regenerate damaged tissues by combining cells from the body with highly porous scaffold biomaterials, which act as templates for tissue regeneration, to guide the growth of new tissue. This article describes the functional requirements, and types, of materials used in developing state of the art of scaffolds for tissue engineering applications. Furthermore, it describes the challenges and where future research and direction is required in this rapidly advancing field.

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Topics: Tissue engineering (58%)

2,152 Citations

Journal ArticleDOI: 10.1002/ADMA.200300385
03 Feb 2004-Advanced Materials
Abstract: Inkjet printing is considered to be a key technology in the field of defined polymer deposition. This article provides an introduction to inkjet printing technology and a short overview of the available instrumentation. Examples of polymer inkjet printing are given, including the manufacturing of multicolor polymer light-emitting diode displays, polymer electronics, three-dimensional printing, and oral dosage forms for controlled drug release. Special emphasis is placed upon the utilized polymers and conditions, such as polymer structure, molar mass, solvents, and concentration. Studies on viscoelastic fluid jets and the formation of viscoelastic droplets under gravity indicate that strain hardening is the key parameter that determines the inkjet printability of polymer solutions.

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Topics: Printed electronics (63%)

1,675 Citations

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