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encapsulated beta cell therapy

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https://www.readbyqxmd.com/read/29452185/an-injectable-chitosan-chondroitin-sulfate-hydrogel-with-tunable-mechanical-properties-for-cell-therapy-tissue-engineering
#1
Yasaman Alinejad, Atma Adoungotchodo, Eve Hui, Fatemeh Zehtabi, Sophie Lerouge
Chitosan (CH) hydrogels with remarkable mechanical properties and rapid gelation rate were recently synthesized by combining sodium hydrogen carbonate (SHC) with another weak base, such as beta-glycerophosphate (BGP). To improve their biological responses, in the present study, chondroitin sulfate (CS) was added to these CH hydrogels. Hydrogel characteristics in terms of pH and osmolarity, as well as rheological, mechanical, morphological and swelling properties, were studied in the absence and presence of CS...
July 1, 2018: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/29204926/alginate-liposomal-construct-for-bupivacaine-delivery-and-msc-function-regulation
#2
Mollie S Davis, Ileana Marrero-Berrios, Xiomara I Perez, Timothy Maguire, Palangat Radhakrishnan, Devasena Manchikalapati, Joseph SchianodiCola, Hattiyangangadi Kamath, Rene S Schloss, Joel Yarmush
Mesenchymal stromal cell (MSC) therapies have become potential treatment options for multiple ailments and traumatic injuries. In the clinical setting, MSC are likely to be co-administered with local anesthetics (LA) which have been shown to have dose- and potency-dependent detrimental effects on the viability and function of cells. We previously developed and characterized a sustained-release LA delivery formulation comprised of alginate-encapsulated liposomal bupivacaine. The current studies were designed to evaluate the effect of this formulation on the secretion of three key MSC regulatory molecules, interleukin 6 (IL-6), prostaglandin E2 (PGE2), and transforming growth factor-beta 1 (TGF-β1)...
February 2018: Drug Delivery and Translational Research
https://www.readbyqxmd.com/read/28789815/bioprinting-and-cellular-therapies-for-type-1-diabetes
#3
REVIEW
Dino J Ravnic, Ashley N Leberfinger, Ibrahim T Ozbolat
Type 1 diabetes mellitus is a chronic autoimmune disease that results from the destruction of beta (β) cells in the pancreatic islets, leading to loss of insulin production and resultant hyperglycemia. Recent developments in stem cell biology have generated much excitement for β-cell replacement strategies; β cells are one of many cell types in the complex islet environment and pancreas. In this Opinion, we discuss recent successful attempts to generate β cells and how this can be coupled with bioprinting technologies in order to fabricate pancreas tissues, which holds great potential for type 1 diabetes...
November 2017: Trends in Biotechnology
https://www.readbyqxmd.com/read/28763191/nanoporous-immunoprotective-device-for-stem-cell-derived-%C3%AE-cell-replacement-therapy
#4
Ryan Chang, Gaetano Faleo, Holger A Russ, Audrey V Parent, Susanna K Elledge, Daniel A Bernards, Jessica L Allen, Karina Villanueva, Matthias Hebrok, Qizhi Tang, Tejal A Desai
Encapsulation of human embryonic stem-cell-differentiated beta cell clusters (hES-βC) holds great promise for cell replacement therapy for the treatment of diabetics without the need for chronic systemic immune suppression. Here, we demonstrate a nanoporous immunoprotective polymer thin film cell encapsulation device that can exclude immune molecules while allowing exchange of oxygen and nutrients necessary for in vitro and in vivo stem cell viability and function. Biocompatibility studies show the device promotes neovascular formation with limited foreign body response in vivo...
August 22, 2017: ACS Nano
https://www.readbyqxmd.com/read/28595815/adipose-derived-stem-cells-seeded-in-pluronic-f-127-hydrogel-promotes-diabetic-wound-healing
#5
Lin Kaisang, Wang Siyu, Fan Lijun, Pan Daoyan, Cory J Xian, Shen Jie
BACKGROUND: Chronic nonhealing wound is a multifactorial complication of diabetes that results specifically as a consequence of impaired angiogenesis and currently lacks in effective treatments. Although a stem cell-based therapy may provide a novel treatment to augment diabetic wound healing, inferior cell survival at the diabetic skin wound is one of the key causes that are responsible for the low efficacy of the stem cell therapy. MATERIALS AND METHODS: In this work, we used an injectable, biocompatible, and thermosensitive hydrogel Pluronic F-127 to encapsulate allogeneic nondiabetic adipose-derived stem cells (ADSCs) and topically applied the cells to a full-thickness cutaneous wound in the streptozotocin-induced diabetic model in rats...
September 2017: Journal of Surgical Research
https://www.readbyqxmd.com/read/28535085/characterization-of-an-encapsulated-insulin-secreting-human-pancreatic-beta-cell-line-in-a-modular-microfluidic-device
#6
Argia Acarregui, Jesús Ciriza, Laura Saenz Del Burgo, Haritz Gurruchaga Iribar, José Yeste, Xavi Illa, Gorka Orive, Rosa M Hernández, Rosa Villa, Jose Luis Pedraz
Type I diabetes mellitus is characterised by the destruction of the insulin producing beta cells within the pancreas by the immune system. After the success of Edmonton protocol, islet transplantation has shown to be a promising therapy, but with the Achilles´ heel of the need of using immunosuppressive drugs. Currently, cell encapsulation technology represents a real alternative to protect transplanted islets from the host´s immune attack. Although preliminary in vitro studies with encapsulated cells have been traditionally performed under static conditions in terms of viability and efficiency, these static cultures do not represent a close approach to in vivo environments...
January 2018: Journal of Drug Targeting
https://www.readbyqxmd.com/read/28362046/co-microencapsulation-of-bmscs-and-mouse-pancreatic-%C3%AE-cells-for-improving-the-efficacy-of-type-i-diabetes-therapy
#7
Ruimin Long, Yuangang Liu, Shibin Wang, Li Ye, Peng He
INTRODUCTION: To overcome the shortcomings of pancreas transplantation and insulin injection treatment for type I diabetes, biocompatible materials were used to prepare alginate-chitosan-alginate microcapsules that co-encapsulated bone marrow mesenchymal stem cells and mouse pancreatic β cells to treat diabetic mice. METHODS: Blank alginate-chitosan-alginate (ACA) microcapsules and co-microencapsulated cells were prepared using a high-voltage electrostatic method and then characterized using an inverted microscope...
May 9, 2017: International Journal of Artificial Organs
https://www.readbyqxmd.com/read/28240241/calcium-pre-conditioning-substitution-enhances-viability-and-glucose-sensitivity-of-pancreatic-beta-cells-encapsulated-using-polyelectrolyte-multilayer-coating-method
#8
Niusha Nikravesh, Sophie C Cox, Gurpreet Birdi, Richard L Williams, Liam M Grover
Type I diabetics are dependent on daily insulin injections. A therapy capable of immunoisolating pancreatic beta-cells and providing normoglycaemia is an alternative since it would avoid the late complications associated with insulin use. Here, 3D-concave agarose micro-wells were used to culture robust pancreatic MIN-6 cell spheroids within 24 hours that were shown to exhibit cell-cell contact and uniform size (201 ± 2 μm). A polyelectrolyte multilayer (PEM) approach using alginate and poly-l-lysine was employed to coat cell spheroids...
February 27, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28116831/optimization-of-injectable-thermosensitive-scaffolds-with-enhanced-mechanical-properties-for-cell-therapy
#9
Caroline Ceccaldi, Elias Assaad, Eve Hui, Medeine Buccionyte, Atma Adoungotchodo, Sophie Lerouge
Strong injectable chitosan thermosensitive hydrogels can be created, without chemical modification, by combining sodium hydrogen carbonate with another weak base, namely, beta-glycerophosphate (BGP) or phosphate buffer (PB). Here the influence of gelling agent concentration on the mechanical properties, gelation kinetics, osmolality, swelling, and compatibility for cell encapsulation, is studied in order to find the most optimal formulations and demonstrate their potential for cell therapy and tissue engineering...
January 24, 2017: Macromolecular Bioscience
https://www.readbyqxmd.com/read/27989857/evaluation-of-plga-containing-anti-ctla4-inhibited-endometriosis-progression-by-regulating-cd4-cd25-treg-cells-in-peritoneal-fluid-of-mouse-endometriosis-model
#10
Qi Liu, Pingchuan Ma, Lanxia Liu, Guilei Ma, Jingjing Ma, Xiaoxuan Liu, Yijin Liu, Wanjun Lin, Yingjun Zhu
Our study investigated poly(lactic-co-glycolic acid) (PLGA) as protein delivery vehicles encapsulate CTLA-4-antibody (anti-CTLA-4) which is essential for CD4+CD25+Treg cells suppressive function exposing superior potential for inhibiting endometriosis progress in mouse model than single anti-CTLA-4. Anti-CTLA-4 loaded PLGA combined to ligands CTLA-4 in surface of CD4+CD25+Treg cells which distributed in peritoneal fluid of mouse endometriosis model. The particle size, zeta potential of the anti-CTLA-4 loaded nanoparticles was detected by dynamic light scattering...
January 1, 2017: European Journal of Pharmaceutical Sciences
https://www.readbyqxmd.com/read/27924469/a-methylcellulose-and-collagen-based-temperature-responsive-hydrogel-promotes-encapsulated-stem-cell-viability-and-proliferation-in-vitro
#11
Christina Payne, Eimear B Dolan, Janice O'Sullivan, Sally-Ann Cryan, Helena M Kelly
With the number of stem cell-based therapies emerging on the increase, the need for novel and efficient delivery technologies to enable therapies to remain in damaged tissue and exert their therapeutic benefit for extended periods, has become a key requirement for their translation. Hydrogels, and in particular, thermoresponsive hydrogels, have the potential to act as such delivery systems. Thermoresponsive hydrogels, which are polymer solutions that transform into a gel upon a temperature increase, have a number of applications in the biomedical field due to their tendency to maintain a liquid state at room temperature, thereby enabling minimally invasive administration and a subsequent ability to form a robust gel upon heating to physiological temperature...
February 2017: Drug Delivery and Translational Research
https://www.readbyqxmd.com/read/27082827/executive-summary-of-ipita-tts-opinion-leaders-report-on-the-future-of-%C3%AE-cell-replacement
#12
REVIEW
James F Markmann, Stephen T Bartlett, Paul Johnson, Olle Korsgren, Bernhard J Hering, David Scharp, Thomas W H Kay, Jonathan Bromberg, Jon S Odorico, Gordon C Weir, Nancy Bridges, Raja Kandaswamy, Peter Stock, Peter Friend, Mitsukazu Gotoh, David K C Cooper, Chung-Gyu Park, Philip J OʼConnell, Cherie Stabler, Shinichi Matsumoto, Barbara Ludwig, Pratik Choudhary, Boris Khovatchev, Michael R Rickels, Megan Sykes, Kathryn Wood, Kristy Kraemer, Albert Hwa, Edward Stanley, Camillo Ricordi, Mark Zimmerman, Julia Greenstein, Eduard Montanya, Timo Otonkoski
The International Pancreas and Islet Transplant Association (IPITA), in conjunction with the Transplantation Society (TTS), convened a workshop to consider the future of pancreas and islet transplantation in the context of potential competing technologies that are under development, including the artificial pancreas, transplantation tolerance, xenotransplantation, encapsulation, stem cell derived beta cells, beta cell proliferation, and endogenous regeneration. Separate workgroups for each topic and then the collective group reviewed the state of the art, hurdles to application, and proposed research agenda for each therapy that would allow widespread application...
July 2016: Transplantation
https://www.readbyqxmd.com/read/27057167/calcium-cobalt-alginate-beads-as-functional-scaffolds-for-cartilage-tissue-engineering
#13
Stefano Focaroli, Gabriella Teti, Viviana Salvatore, Isabella Orienti, Mirella Falconi
Articular cartilage is a highly organized tissue with complex biomechanical properties. However, injuries to the cartilage usually lead to numerous health concerns and often culminate in disabling symptoms, due to the poor intrinsic capacity of this tissue for self-healing. Although various approaches are proposed for the regeneration of cartilage, its repair still represents an enormous challenge for orthopedic surgeons. The field of tissue engineering currently offers some of the most promising strategies for cartilage restoration, in which assorted biomaterials and cell-based therapies are combined to develop new therapeutic regimens for tissue replacement...
2016: Stem Cells International
https://www.readbyqxmd.com/read/27037212/boost-for-alginate-encapsulation-in-beta-cell-transplantation
#14
Daniel Pipeleers, Bart Keymeulen
A recent study reported that encapsulation of human embryonic stem cell (hESC)-derived beta cells by a novel alginate formula protects against foreign body reactivity in immune-competent mice. Intraperitoneal implants corrected a diabetic state for at least 6 months. These observations will stimulate the development of alginate encapsulation towards novel cell therapy protocols for treating type 1 diabetes (T1DM).
May 2016: Trends in Endocrinology and Metabolism: TEM
https://www.readbyqxmd.com/read/26837777/effect-of-oxygen-supply-on-the-size-of-implantable-islet-containing-encapsulation-devices
#15
REVIEW
Klearchos K Papas, Efstathios S Avgoustiniatos, Thomas M Suszynski
Beta-cell replacement therapy is a promising approach for the treatment of diabetes but is currently limited by the human islet availability and by the need for systemic immunosuppression. Tissue engineering approaches that will enable the utilization of islets or β-cells from alternative sources (such as porcine islets or human stem cell derived beta cells) and minimize or eliminate the need for immunosuppression have the potential to address these critical limitations. However, tissue engineering approaches are critically hindered by the device size (similar to the size of a large flat screen television) required for efficacy in humans...
March 2016: Panminerva Medica
https://www.readbyqxmd.com/read/26836197/nanoformulated-alpha-mangostin-ameliorates-alzheimer-s-disease-neuropathology-by-elevating-ldlr-expression-and-accelerating-amyloid-beta-clearance
#16
Lei Yao, Xiao Gu, Qingxiang Song, Xiaolin Wang, Meng Huang, Meng Hu, Lina Hou, Ting Kang, Jun Chen, Hongzhuan Chen, Xiaoling Gao
Alzheimer's disease (AD), the most common form of dementia, is now representing one of the largest global healthcare challenges. However, an effective therapy is still lacking. Accumulation of amyloid-beta (Aβ) in the brain is supposed to trigger pathogenic cascades that eventually lead to AD. Therefore, Aβ clearance strategy is being actively pursued as a promising disease modifying therapy. Here, we found that α-mangostin (α-M), a polyphenolic xanthone derivative from mangosteen, up-regulated low density lipoprotein receptor (LDLR) expression in microglia and liver cells, and efficiently facilitated Aβ clearance...
March 28, 2016: Journal of Controlled Release: Official Journal of the Controlled Release Society
https://www.readbyqxmd.com/read/26808346/long-term-glycemic-control-using-polymer-encapsulated-human-stem-cell-derived-beta-cells-in-immune-competent-mice
#17
Arturo J Vegas, Omid Veiseh, Mads Gürtler, Jeffrey R Millman, Felicia W Pagliuca, Andrew R Bader, Joshua C Doloff, Jie Li, Michael Chen, Karsten Olejnik, Hok Hei Tam, Siddharth Jhunjhunwala, Erin Langan, Stephanie Aresta-Dasilva, Srujan Gandham, James J McGarrigle, Matthew A Bochenek, Jennifer Hollister-Lock, Jose Oberholzer, Dale L Greiner, Gordon C Weir, Douglas A Melton, Robert Langer, Daniel G Anderson
The transplantation of glucose-responsive, insulin-producing cells offers the potential for restoring glycemic control in individuals with diabetes. Pancreas transplantation and the infusion of cadaveric islets are currently implemented clinically, but these approaches are limited by the adverse effects of immunosuppressive therapy over the lifetime of the recipient and the limited supply of donor tissue. The latter concern may be addressed by recently described glucose-responsive mature beta cells that are derived from human embryonic stem cells (referred to as SC-β cells), which may represent an unlimited source of human cells for pancreas replacement therapy...
March 2016: Nature Medicine
https://www.readbyqxmd.com/read/26680504/theranostical-nanosystem-mediated-identification-of-an-oncogene-and-highly-effective-therapy-in-hepatocellular-carcinoma
#18
Yu Guo, Jing Wang, Lu Zhang, Shunli Shen, Ruomi Guo, Yang Yang, Wenjie Chen, Yiru Wang, Guihua Chen, Xintao Shuai
UNLABELLED: Because the primary surgical treatment options for hepatocellular carcinoma (HCC)-including hepatic resection and liver transplantation-often fail due to recurrence and metastasis, identifying early prognostic biomarkers and therapeutic targets for HCC is of great importance. This study shows that transducin β-like protein 1-related protein (TBLR1) is a key HCC oncogene that plays important roles in HCC proliferation, antiapoptosis, and angiogenesis by regulating the Wnt/β-catenin pathway...
April 2016: Hepatology: Official Journal of the American Association for the Study of Liver Diseases
https://www.readbyqxmd.com/read/26659438/encapsulated-beta-cell-replacement-therapy-for-type-1-diabetes
#19
(no author information available yet)
No abstract text is available yet for this article.
November 2015: Cardiovascular Journal of Africa
https://www.readbyqxmd.com/read/26576437/mesenchymal-stem-cells-rising-concerns-over-their-application-in-treatment-of-type-one-diabetes-mellitus
#20
REVIEW
Seyed Jafar Hashemian, Marjan Kouhnavard, Ensieh Nasli-Esfahani
Type 1 diabetes mellitus (T1DM) is an autoimmune disorder that leads to beta cell destruction and lowered insulin production. In recent years, stem cell therapies have opened up new horizons to treatment of diabetes mellitus. Among all kinds of stem cells, mesenchymal stem cells (MSCs) have been shown to be an interesting therapeutic option based on their immunomodulatory properties and differentiation potentials confirmed in various experimental and clinical trial studies. In this review, we discuss MSCs differential potentials in differentiation into insulin-producing cells (IPCs) from various sources and also have an overview on currently understood mechanisms through which MSCs exhibit their immunomodulatory effects...
2015: Journal of Diabetes Research
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