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https://www.readbyqxmd.com/read/28945009/biomechanical-regulation-of-mesenchymal-stem-cells-for-cardiovascular-tissue-engineering
#1
REVIEW
Kayla Henderson, Andrew D Sligar, Victoria P Le, Jason Lee, Aaron B Baker
Mesenchymal stem cells (MSCs) are an appealing potential therapy for vascular diseases; however, many challenges remain in their clinical translation. While the use of biochemical, pharmacological, and substrate-mediated treatments to condition MSCs has been subjected to intense investigation, there has been far less exploration of using these treatments in combination with applied mechanical force for conditioning MSCs toward vascular phenotypes. This review summarizes the current understanding of the use of applied mechanical forces to differentiate MSCs into vascular cells and enhance their therapeutic potential for cardiovascular disease...
September 25, 2017: Advanced Healthcare Materials
https://www.readbyqxmd.com/read/28944322/advances-in-small-bowel-transplantation
#2
REVIEW
Alp Gürkan
Small bowel transplantation is a life-saving surgery for patients with intestinal failure. The biggest problem in intestinal transplantation is graft rejection. Graft rejection is the main reason for morbidity and mortality. Rejection has a negative effect on the survival of the graft. While 50%-75% of small bowel transplantation patients experience acute rejection, chronic rejection occurs in approximately 15% of patients. Immune monitoring is crucial after small bowel transplantation. Unlike other types of transplantation, there are no non-invasive or reliable markers to predict rejection in small bowel transplantation...
2017: Turk J Surg
https://www.readbyqxmd.com/read/28942575/a-contact-based-method-for-differentiation-of-human-mesenchymal-stem-cells-into-an-endothelial-cell-phenotype
#3
Binata Joddar, Shweta Anil Kumar, Alok Kumar
Adult stem cells such as mesenchymal stem cells (MSC) are known to possess the ability to augment neovascularization processes and are thus widely popular as an autologous source of progenitor cells. However there is a huge gap in our current knowledge of mechanisms involved in differentiating MSC into endothelial cells (EC), essential for lining engineered blood vessels. To fill up this gap, we attempted to differentiate human MSC into EC, by culturing the former onto chemically fixed layers of EC or its ECM, respectively...
September 23, 2017: Cell Biochemistry and Biophysics
https://www.readbyqxmd.com/read/28942128/vascular-smooth-muscle-cells-derived-from-inbred-swine-induced-pluripotent-stem-cells-for-vascular-tissue-engineering
#4
Jiesi Luo, Lingfeng Qin, Mehmet H Kural, Jonas Schwan, Xia Li, Oscar Bartulos, Xiao-Qiang Cong, Yongming Ren, Liqiong Gui, Guangxin Li, Matthew W Ellis, Peining Li, Darrell N Kotton, Alan Dardik, Jordan S Pober, George Tellides, Marsha Rolle, Stuart Campbell, Robert J Hawley, David H Sachs, Laura E Niklason, Yibing Qyang
Development of autologous tissue-engineered vascular constructs using vascular smooth muscle cells (VSMCs) derived from human induced pluripotent stem cells (iPSCs) holds great potential in treating patients with vascular disease. However, preclinical, large animal iPSC-based cellular and tissue models are required to evaluate safety and efficacy prior to clinical application. Herein, swine iPSC (siPSC) lines were established by introducing doxycycline-inducible reprogramming factors into fetal fibroblasts from a line of inbred Massachusetts General Hospital miniature swine that accept tissue and organ transplants without immunosuppression within the line...
September 19, 2017: Biomaterials
https://www.readbyqxmd.com/read/28941163/colorectal-wall-regeneration-resulting-from-the-association-of-chitosan-hydrogel-and-stromal-vascular-fraction-from-adipose-tissue
#5
Quentin Denost, Arnaud Pontallier, Etienne Buscail, Alexandra Montembault, Reine Bareille, Robin Siadous, Marlene Durand, Samantha Delmond, Laurent David, Laurence Bordenave
Chitosan hydrogel and Adipose Derived Stem Cells (ADCS) have been reported as the optimal partnership for colorectal tissue engineering. In that field, the aim of the current experiment was to asses, the interest of seeding ADSC on chitosan hydrogel patches in an in vivo comparative study and on a tube intended replace a colonic segment in an in vivo feasibility study. In the comparative study, a 2x3 cm colonic wall defect was performed in 20 swines and repaired by suturing a chitosan hydrogel patch: acellular matrix (Group A, n=10) vs...
September 22, 2017: Journal of Biomedical Materials Research. Part A
https://www.readbyqxmd.com/read/28939556/targeting-phosphatidylserine-with-calcium-dependent-protein-drug-conjugates-for-the-treatment-of-cancer
#6
Ran Li, Srinivas Chiguru, Li Li, Dongyoung Kim, Ramraj Velmurugan, David Kim, Siva Charan Devanaboyina, Hong Tian, Alan Schroit, Ralph Mason, Raimund J Ober, E Sally Ward
In response to cellular stress, phosphatidylserine (PS) is exposed on the outer membrane leaflet of tumor blood vessels and cancer cells, motivating the development of PS-specific therapies. The generation of drug-conjugated PS-targeting agents represents an unexplored therapeutic approach, for which anti-tumor effects are critically dependent on efficient internalization and lysosomal delivery of the cytotoxic drug. In the current study, we have generated PS-targeting agents by fusing PS-binding domains to a human IgG1-derived Fc fragment...
September 22, 2017: Molecular Cancer Therapeutics
https://www.readbyqxmd.com/read/28937976/tissue-engineering-for-the-treatment-of-short-bowel-syndrome-in-children
#7
REVIEW
Laura Y Martin, Mitchell R Ladd, Adam Werts, Chhinder P Sodhi, John C March, David J Hackam
Short bowel syndrome is a major cause of morbidity and mortality in children. Despite decades of experience in the management of short bowel syndrome, current therapy is primarily supportive. Definitive treatment often requires intestinal transplantation, which is associated with significant morbidity and mortality. In order to develop novel approaches to the treatment of short bowel syndrome, we and others have focused on the development of an artificial intestine, by placing intestinal stem cells on a bioscaffold that has an absorptive surface resembling native intestine, and taking advantage of neovascularization to develop a blood supply...
September 22, 2017: Pediatric Research
https://www.readbyqxmd.com/read/28936269/microfibrous-scaffolds-enhance-endothelial-differentiation-and-organization-of-induced-pluripotent-stem-cells
#8
Joseph J Kim, Luqia Hou, Guang Yang, Nicholas P Mezak, Maureen Wanjare, Lydia M Joubert, Ngan F Huang
INTRODUCTION: Human induced pluripotent stem cells (iPSCs) are a promising source of endothelial cells (iPSC-ECs) for engineering three-dimensional (3D) vascularized cardiac tissues. To mimic cardiac microvasculature, in which capillaries are oriented in parallel, we hypothesized that endothelial differentiation of iPSCs within topographically aligned 3D scaffolds would be a facile one-step approach to generate iPSC-ECs as well as induce aligned vascular organization. METHODS: Human iPSCs underwent endothelial differentiation within electrospun 3D polycaprolactone (PCL) scaffolds having either randomly oriented or parallel-aligned microfibers...
October 2017: Cellular and Molecular Bioengineering
https://www.readbyqxmd.com/read/28932749/vascular-tissue-engineering-effects-of-integrating-collagen-into-a-pcl-based-nanofiber-material
#9
Ulf Bertram, Dominik Steiner, Benjamin Poppitz, Dirk Dippold, Katrin Köhn, Justus P Beier, Rainer Detsch, Aldo R Boccaccini, Dirk W Schubert, Raymund E Horch, Andreas Arkudas
The engineering of vascular grafts is a growing field in regenerative medicine. Although numerous attempts have been made, the current vascular grafts made of polyurethane (PU), Dacron®, or Teflon® still display unsatisfying results. Electrospinning of biopolymers and native proteins has been in the focus of research to imitate the extracellular matrix (ECM) of vessels to produce a small caliber, off-the-shelf tissue engineered vascular graft (TEVG) as a substitute for poorly performing PU, Dacron, or Teflon prostheses...
2017: BioMed Research International
https://www.readbyqxmd.com/read/28930985/visualizing-angiogenesis-by-multiphoton-microscopy-in-vivo-in-genetically-modified-3d-plga-nhap-scaffold-for-calvarial-critical-bone-defect-repair
#10
Jian Li, Holger Jahr, Wei Zheng, Pei-Gen Ren
The reconstruction of critically sized bone defects remains a serious clinical problem because of poor angiogenesis within tissue-engineered scaffolds during repair, which gives rise to a lack of sufficient blood supply and causes necrosis of the new tissues. Rapid vascularization is a vital prerequisite for new tissue survival and integration with existing host tissue. The de novo generation of vasculature in scaffolds is one of the most important steps in making bone regeneration more efficient, allowing repairing tissue to grow into a scaffold...
September 7, 2017: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/28930432/injectable-stem-cell-laden-open-porous-microgels-that-favour-adipogenesis-in-vitro-and-in-vivo-evaluation
#11
Pengfei Xia, Kunxi Zhang, Yan Gong, Guifei Li, Shifeng Yan, Jingbo Yin
Microgels, with large surface area per volume, show great advantages in adipose tissue engineering due to their injectability and similarity with natural extracellular matrix. However, to date, no studies have tried applying microgels to adipose tissue regeneration. Herein, based on double bonded poly-(L-glutamic acid)-g-2-Hydroxyethyl methacrylate (PLGA-g-HEMA) and maleic anhydride-modified chitosan (MCS), an open porous microgel with high hydrophilicity and great injectability is successfully prepared (microgels diameter of 200-300 μm, pore diameter of 38 μm, and porosity of 88...
September 20, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28928907/adipose-derived-stromal-cell-in-regenerative-medicine-a-review
#12
REVIEW
Reza Tabatabaei Qomi, Mohsen Sheykhhasan
The application of appropriate cell origin for utilizing in regenerative medicine is the major issue. Various kinds of stem cells have been used for the tissue engineering and regenerative medicine. Such as, several stromal cells have been employed as treat option for regenerative medicine. For example, human bone marrow-derived stromal cells and adipose-derived stromal cells (ADSCs) are used in cell-based therapy. Data relating to the stem cell therapy and processes associated with ADSC has developed remarkably in the past 10 years...
August 26, 2017: World Journal of Stem Cells
https://www.readbyqxmd.com/read/28927933/azopolymer-photopatterning-for-directional-control-of-angiogenesis
#13
Chiara Fedele, Maria De Gregorio, Paolo A Netti, Silvia Cavalli, Chiara Attanasio
Understanding cellular behavior in response to microenvironmental stimuli is central to tissue engineering. An increasing number of reports emphasize the high sensitivity of cells to the physical characteristics of the surrounding milieu and in particular, topographical cues. In this work, we investigated the influence of dynamic topographic signal presentation on sprout formation and the possibility to obtain a space-time control over sprouting directionality without growth factors, in order to investigate the contribution of just topography in the angiogenic process...
September 18, 2017: Acta Biomaterialia
https://www.readbyqxmd.com/read/28927334/evaluation-of-xenogeneic-extracellular-matrix-fabricated-from-cucl2-conditioned-mesenchymal-stem-cell-sheets-as-a-bioactive-wound-dressing-material
#14
Hui-Cong Du, Lin Jiang, Wen-Xin Geng, Jing Li, Rui Zhang, Jin-Ge Dang, Mao-Guo Shu, Li-Wen Li
The extracellular matrix has drawn considerable interest in tissue engineering not only acts as a bioactive three-dimensional scaffold but also regulates cell behaviors through providing biochemical signals. Extracellular matrix-based biomaterials, mainly derived from xenogeneic tissues, have shown positive outcomes in promoting cutaneous wound healing. However, such extracellular matrices only contain low doses of growth factors, which limit their therapeutic efficiency. Recent reports demonstrated that cell sheets made from mesenchymal stem cell can accelerate wound repair through enhanced re-epithelialization and angiogenesis, but its clinical translation is hindered by several limitations, such as the risk of aberrant immune responses and cost implications...
January 1, 2017: Journal of Biomaterials Applications
https://www.readbyqxmd.com/read/28924210/kinase-inhibitor-screening-using-artificial-neural-networks-and-engineered-cardiac-biowires
#15
Genevieve Conant, Samad Ahadian, Yimu Zhao, Milica Radisic
Kinase inhibitors are often used as cancer targeting agents for their ability to prevent the activation of cell growth and proliferation signals. Cardiotoxic effects have been identified for some marketed kinase inhibitors that were not detected during clinical trials. We hypothesize that more predictive cardiac functional assessments of kinase inhibitors on human myocardium can be established by combining a high-throughput two-dimensional (2D) screening assay and a high-content three-dimensional (3D) engineered cardiac tissue (Biowire(TM)) based assay, and using human induced pluripotent stem cell-derived CMs (hiPSC-CMs)...
September 18, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28923855/mitosis-mediated-intravasation-in-a-tissue-engineered-tumor-microvessel-platform
#16
Andrew D Wong, Peter C Searson
Intravasation involves the migration of tumor cells across the local endothelium and escape into vessel flow. While tumor cell invasiveness has been correlated to increased intravasation, the details of transendothelial migration and detachment into circulation are still unclear. Here we analyzed the intravasation of invasive human breast cancer cells within a tissue-engineered microvessel model of the tumor microenvironment. Using live-cell fluorescence microscopy, we captured 2,330 hours of tumor cell interactions with functional microvessels and provide evidence for a mitosis-mediated mechanism where tumor cells located along the vessel periphery are able to disrupt the vessel endothelium through cell division and detach into circulation...
September 18, 2017: Cancer Research
https://www.readbyqxmd.com/read/28923324/regenerating-heart-using-a-novel-compound-and-human-wharton-jelly-mesenchymal-stem-cells
#17
Shahram Rabbani, Masoud Soleimani, Mohammad Imani, Mohammad Sahebjam, Ali Ghiaseddin, Seyed Mahdi Nassiri, Jalil Majd Ardakani, Maryam Tajik Rostami, Arash Jalali, Bahmanshir Mousanassab, Mahsa Kheradmandi, Seyed Hossein Ahmadi Tafti
BACKGROUND: Myocardial infarction is a major problem in health system and most conventional therapy is not led to restoration of the health. Stem cell therapy is a method to regenerate the heart but today appropriate cell source and scaffold selection as extracellular matrix to achieve the best effect is disputing. AIM OF THE STUDY: In this study a combination of human Wharton jelly mesenchymal stem cells (HWJMSCs) with a novel compound consisting polyethylene glycol (PEG), hyaluronic acid and chitosan is presented to heart regeneration...
April 2017: Archives of Medical Research
https://www.readbyqxmd.com/read/28922983/strategic-directions-in-immunoresponsive-biomaterials-in-tissue-engineering
#18
David Zaharoff, Christopher Jewell
Since its inception three to five decades ago (depending on who you ask), the field of tissue engineering has been inextricably linked with advances in biomaterials. Early developments in tissue engineering focused mainly on biocompatibility aspects. Natural and synthetic biomaterials were developed with a primary focus on maintaining cell viability prior to and shortly after the application or implantation of a seeded scaffold. Once a sufficient level of viability could be reproducibly achieved, the focus shifted to developing biomaterials with additional features, such as customized biodegradability and/or mechanical function...
September 19, 2017: Tissue Engineering. Part A
https://www.readbyqxmd.com/read/28917530/overcoming-key-biological-barriers-to-cancer-drug-delivery-and-efficacy
#19
Susy M Kim, Peggy H Faix, Jan E Schnitzer
Poor delivery efficiency continues to hamper the effectiveness of cancer therapeutics engineered to destroy solid tumors using different strategies such as nanocarriers, targeting agents, and matching treatments to specific genetic mutations. All contemporary anti-cancer agents are dependent upon passive transvascular mechanisms for their delivery into solid tumors. The therapeutic efficacies of our current drug arsenal could be significantly improved with an active delivery strategy. Here, we discuss how drug delivery and therapeutic efficacy is greatly hindered by barriers presented by the vascular endothelial cell layer and by the aberrant nature of tumor blood vessels in general...
September 13, 2017: Journal of Controlled Release: Official Journal of the Controlled Release Society
https://www.readbyqxmd.com/read/28915929/the-combination-of-stem-cells-and-tissue-engineering-an-advanced-strategy-for-blood-vessels-regeneration-and-vascular-disease-treatment
#20
REVIEW
Ying Wang, Pei Yin, Guang-Liang Bian, Hao-Yue Huang, Han Shen, Jun-Jie Yang, Zi-Ying Yang, Zhen-Ya Shen
Over the past years, vascular diseases have continued to threaten human health and increase financial burdens worldwide. Transplantation of allogeneic and autologous blood vessels is the most convenient treatment. However, it could not be applied generally due to the scarcity of donors and the patient's condition. Developments in tissue engineering are contributing greatly with regard to this urgent need for blood vessels. Tissue engineering-derived blood vessels are promising alternatives for patients with aortic dissection/aneurysm...
September 15, 2017: Stem Cell Research & Therapy
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