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https://www.readbyqxmd.com/read/28433665/advancing-the-science-of-myocardial-recovery-with-mechanical-circulatory-support-a-working-group-of-the-national-heart-lung-and-blood-institute
#1
Stavros G Drakos, Francis D Pagani, Martha S Lundberg, J Timothy Baldwin
The medical burden of heart failure (HF) has spurred interest in clinicians and scientists to develop therapies to restore the function of a failing heart. To advance this agenda, the National Heart Lung Blood Institute (NHLBI) convened a Working Group of experts on June 2-3, 2016 in Bethesda Maryland to develop recommendations for the NHLBI aimed at advancing the science of cardiac recovery in the setting of mechanical circulatory support (MCS). MSC devices effectively reduce volume and pressure overload that drives the cycle of progressive myocardial dysfunction, thereby triggering structural and functional reverse remodeling...
April 19, 2017: Journal of Cardiac Failure
https://www.readbyqxmd.com/read/28430301/towards-a-bioengineered-kidney-recellularization-strategies-for-decellularized-native-kidney-scaffolds
#2
Michele Fedecostante, Oana G Onciu, Koen G C Westphal, Rosalinde Masereeuw
Patients with end-stage renal disease often undergo dialysis as a partial substitute for kidney function while waiting for their only treatment option: a kidney transplant. Several research directions emerged for alternatives in support of the ever-growing numbers of patients. Recent years brought big steps forward in the field, with researchers questioning and improving the current dialysis devices as well as moving towards the design of a bioengineered kidney. Whole-organ engineering is also being explored as a possibility, making use of animal or human kidney scaffolds for engineering a transplantable organ...
April 20, 2017: International Journal of Artificial Organs
https://www.readbyqxmd.com/read/28430194/engineering-genetic-circuit-interactions-within-and-between-synthetic-minimal-cells
#3
Katarzyna P Adamala, Daniel A Martin-Alarcon, Katriona R Guthrie-Honea, Edward S Boyden
Genetic circuits and reaction cascades are of great importance for synthetic biology, biochemistry and bioengineering. An open question is how to maximize the modularity of their design to enable the integration of different reaction networks and to optimize their scalability and flexibility. One option is encapsulation within liposomes, which enables chemical reactions to proceed in well-isolated environments. Here we adapt liposome encapsulation to enable the modular, controlled compartmentalization of genetic circuits and cascades...
May 2017: Nature Chemistry
https://www.readbyqxmd.com/read/28429283/use-of-hormones-tissue-factors-and-bioengineering-in-the-management-of-hypospadias
#4
Aparajita Mitra, Yogesh Kumar Sarin
Hypospadiology is a rapidly evolving field. Progress in the understanding of how hormonal therapy affects the growth of the phallus has allowed surgeons to optimize the tissues for surgery. But conflicting data from a number of studies and a lack of consensus on drugs, their dosing, mode of delivery and timing of use means that the creation of protocols is unlikely to happen in the near future. Nonetheless, there is a hope and the standardization of scientific reporting will make it easier to compare data at the global level...
April 21, 2017: Indian Journal of Pediatrics
https://www.readbyqxmd.com/read/28428541/tissue-engineered-cornea-constructed-with-compressed-collagen-and-laser-perforated-electrospun-mat
#5
Bin Kong, Wei Sun, Guoshi Chen, Song Tang, Ming Li, Zengwu Shao, Shengli Mi
While Plastic Compressed (PC) collagen technique is often used to fabricate bioengineered constructs, PC collagen gels are too weak to be sutured or conveniently handled for clinical applications. To overcome this limitation, electrospun poly (lactic-co-glycolide) (PLGA) mats, which have excellent biocompatibility and mechanical properties, were combined with PC collagen to fabricate sandwich-like hybrid constructs. By laser-perforating holes with different sizes and spacings in the electrospun mats to regulate the mechanical properties and light transmittance of the hybrid constructs, we produced hybrid constructs with properties very suitable to apply in corneal tissue engineering...
April 20, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28425633/biotechnology-and-bioengineering-volume-114-number-6-june-2017
#6
(no author information available yet)
No abstract text is available yet for this article.
June 2017: Biotechnology and Bioengineering
https://www.readbyqxmd.com/read/28417597/ultrahigh-water-content-superelastic-and-shape-memory-nanofiber-assembled-hydrogels-exhibiting-pressure-responsive-conductivity
#7
Yang Si, Lihuan Wang, Xueqin Wang, Ning Tang, Jianyong Yu, Bin Ding
High-water-content hydrogels that are both mechanically robust and conductive could have wide applications in fields ranging from bioengineering and electronic devices to medicine; however, creating such materials has proven to be extremely challenging. This study presents a scalable methodology to prepare superelastic, cellular-structured nanofibrous hydrogels (NFHs) by combining alginate and flexible SiO2 nanofibers. This approach causes naturally abundant and sustainable alginate to assemble into 3D elastic bulk NFHs with tunable water content and desirable shapes on a large scale...
April 18, 2017: Advanced Materials
https://www.readbyqxmd.com/read/28415888/bioengineered-gold-nanoparticles-targeted-to-mesenchymal-cells-from-patients-with-bronchiolitis-obliterans-syndrome-does-not-rise-the-inflammatory-response-and-can-be-safely-inhaled-by-rodents
#8
Emanuela Cova, Simona Inghilleri, Laura Pandolfi, Monica Morosini, Sara Magni, Miriam Colombo, Davide Piloni, Chiara Finetti, Gabriele Ceccarelli, Laura Benedetti, Maria Gabriella Cusella, Manuela Agozzino, Fabio Corsi, Raffaele Allevi, Simona Mrakic-Sposta, Sarah Moretti, Simona De Gregori, Davide Prosperi, Federica Meloni
The use of gold nanoparticles as drug delivery system represents a promising issue for diseases without effective pharmacological treatment due to insufficient local drug accumulation and excessive systemic toxicity. Bronchiolitis obliterans syndrome (BOS) represents about 70% of cases of chronic lung allograft dysfunction, the main challenge to long term lung transplantation. It is believed that due to repeated insults to epithelial bronchiolar cells local inflammatory response creates a milieu that favours epithelial mesenchymal transition and activation of local mesenchymal cells leading to airway fibro-obliteration...
April 18, 2017: Nanotoxicology
https://www.readbyqxmd.com/read/28412554/prompt-peripheral-nerve-regeneration-induced-by-a-hierarchically-aligned-fibrin-nanofiber-hydrogel
#9
Jinrong Du, Jianheng Liu, Shenglian Yao, Haiquan Mao, Jiang Peng, Xun Sun, Zheng Cao, Yongdong Yang, Bo Xiao, Yiguo Wang, Peifu Tang, Xiumei Wang
Fibrin plays a crucial role in peripheral nerve regeneration, which could occur spontaneously in the format of longitudinally oriented fibrin cables during the initial stage of nerve regeneration. This fibrin cable can direct migration and proliferation of Schwann cells and axonal regrowth, which is very important to nerve regeneration. In the present study, we prepared a three-dimensional hierarchically aligned fibrin nanofiber hydrogel (AFG) through electrospinning and molecular self-assembly to resemble the architecture and biological function of the native fibrin cable...
April 12, 2017: Acta Biomaterialia
https://www.readbyqxmd.com/read/28412223/bioengineered-robust-hybrid-hydrogels-enrich-the-stability-and-efficacy-of-biological-drugs
#10
Moon Soo Gil, Jinhwan Cho, Thavasyappan Thambi, V H Giang Phan, Inchan Kwon, Doo Sung Lee
Biological drugs are exquisitely tailored components offering the advantages of high specificity and efficacy that are considered safe for treating diseases. Nevertheless, the effectiveness of biological drugs is limited by their inherent short biological half-life and poor stability in vivo. Herein, we engineered a novel delivery platform based on hybrid injectable hydrogels, in which pH- and temperature-responsive biodegradable copolymers were site-specifically coupled to the sulfhydryl group of human serum albumin, which effectively enhances the stability and circulation half-life of the biological drug, recombinant uricase enzyme (Uox)...
April 12, 2017: Journal of Controlled Release: Official Journal of the Controlled Release Society
https://www.readbyqxmd.com/read/28411253/a-new-path-to-platelet-production-through-matrix-sensing
#11
Vittorio Abbonante, Christian Andrea Di Buduo, Cristian Gruppi, Carmelo De Maria, Elise Spedden, Aurora De Acutis, Cristian Staii, Mario Raspanti, Giovanni Vozzi, David Kaplan, Francesco Moccia, Katya Ravid, Alessandra Balduini
Megakaryocytes in the bone marrow are immersed in a network of extracellular matrix (ECM) components that regulate platelet release into the circulation. Combining biological and bioengineering approaches, we found that the activation of transient receptor potential cation channel subfamily V member 4 (TRPV4), a mechano-sensitive ion channel, is induced upon megakaryocyte adhesion on softer matrices. This response promoted platelet production by triggering a cascade of events that lead to calcium influx, β1 integrin activation and internalization, and Akt phosphorylation, responses not found on stiffer matrices...
April 14, 2017: Haematologica
https://www.readbyqxmd.com/read/28411103/-endogenous-regeneration-engineering-growth-factors-for-stroke
#12
REVIEW
Su Jing Chan, Christopher Love, Myron Spector, Simon M Cool, Victor Nurcombe, Eng H Lo
Despite the efforts in developing therapeutics for stroke, recombinant tissue plasminogen activator (rtPA) remains the only FDA approved drug for ischemic stroke. Regenerative medicine targeting endogenous growth factors has drawn much interest in the clinical field as it provides potential restoration for the damaged brain tissue without being limited by a narrow therapeutic window. To date, most of the translational studies using regenerative medicines have encountered problems and failures. In this review, we discuss the effects of some trophic factors which include of erythropoietin (EPO), brain derived neurotrophic factor (BDNF), granulocyte-colony stimulating factor (G-CSF), vascular endothelial growth factor (VEGF), fibroblast growth factor (FGF), epidermal growth factor (EGF) and heparin binding epidermal growth factor (HB-EGF) in experimental ischemic stroke models and elaborate the lost in translation of the candidate growth factors from bench to bedside...
April 11, 2017: Neurochemistry International
https://www.readbyqxmd.com/read/28403748/a-cost-effective-method-of-atelo-collagen-type-1-3-col1-3-isolation-from-human-placenta-and-its-in-vitro-characterization-in-2d-and-3d-cell-culture-applications
#13
Johannes Hackethal, Severin Mühleder, Alexandra Hofer, Karl Heinrich Schneider, Johanna Prüller, Simone Hennerbichler, Johann Eibl, Heinz Redl, Andreas Herbert Teuschl
Pepsin-solubilized atelocollagen can be used to form highly complex three-dimensional matrices for a broad spectrum of tissue engineering applications. Moreover, it has a long history as a favorable biomaterial in pharmaceutical and medical industries. So far, the main sources for these approaches are collagens from xenogenic sources. Yet, these non-human collagens carry a risk of provoking immune reactions in patients. Here, we describe an effective method of isolating atelocollagen type 1/3 (COL1/3) from human placenta...
April 12, 2017: Tissue Engineering. Part C, Methods
https://www.readbyqxmd.com/read/28400011/use-of-enhanced-nisin-derivatives-in-combination-with-food-grade-oils-or-citric-acid-to-control-cronobacter-sakazakii-and-escherichia-coli-o157-h7
#14
Alicia Campion, Ruth Morrissey, Des Field, Paul D Cotter, Colin Hill, R Paul Ross
Cronobacter sakazakii and Escherichia coli O157:H7 are well known food-borne pathogens that can cause severe disease. The identification of new alternatives to heating to control these pathogens in foods, while reducing the impact on organoleptic properties and nutritional value, is highly desirable. In this study, nisin and its bioengineered variants, nisin V and nisin S29A, are used alone, or in combination with plant essential oils (thymol, carvacrol and trans-cinnamaldehyde) or citric acid, with a view to controlling C...
August 2017: Food Microbiology
https://www.readbyqxmd.com/read/28395322/de-and-recellularization-of-the-pig-uterus-a-bioengineering-pilot-study%C3%A2
#15
Hannes Campo, Pedro M Baptista, Nuria López-Pérez, Amparo Faus, Irene Cervelló, Carlos Simón
Absolute uterine factor infertility, or the absence of a functional uterus, has a prevalence of 3%-5% in the general population. Despite the great strides being made in reproductive medicine, patients diagnosed with absolute uterine factor infertility remain untreatable. The only available solution has been gestational surrogacy, but recently the Brannström group presented a viable alternative by reporting the first successful live birth after uterus transplantation. Similar to other transplantations, this approach has inherent limitations such as the paucity of donor organs and the need for long-term immunosuppression...
January 1, 2017: Biology of Reproduction
https://www.readbyqxmd.com/read/28394734/optimization-of-bioengineered-heparin-heparan-sulfate-production-for-therapeutic-applications
#16
Megan S Lord, MoonSun Jung, John M Whitelock
Heparin has been used clinically as an anti-coagulant for more than 100 y and the major source of this therapeutic is still animal tissues. Contamination issues in some batches of heparin over 10 y ago have highlighted the need to develop alternative methods of production of this essential drug. (1) Bioengineering heparin by expressing serglycin in mammalian cells is a promising approach that was recently reported by the authors. (2) This addendum explores the approaches that the authors are taking to increase the yield of recombinantly expressed serglycin decorated with heparin/heparan sulfate focusing on cell culture and bioreactor conditions and proposes that the cell microenvironment is a key modulator of heparin biosynthesis...
April 10, 2017: Bioengineered
https://www.readbyqxmd.com/read/28394476/enhanced-self-renewal-and-accelerated-differentiation-of-human-fetal-neural-stem-cells-using-graphene-oxide-nanoparticles
#17
Jin Kim, Kisuk Yang, Jong Seung Lee, Yong Hwa Hwang, Hyun-Ji Park, Kook In Park, Dong Yun Lee, Seung-Woo Cho
Graphene oxide (GO) has received increasing attention in bioengineering fields due to its unique biophysical and electrical properties, along with excellent biocompatibility. The application of GO nanoparticles (GO-NPs) to engineer self-renewal and differentiation of human fetal neural stem cells (hfNSCs) is reported. GO-NPs added to hfNSC culture during neurosphere formation substantially promote cell-to-cell and cell-to-matrix interactions in neurospheres. Accordingly, GO-NP-treated hfNSCs show enhanced self-renewal ability and accelerated differentiation compared to untreated cells, indicating the utility of GO in developing stem cell therapies for neurogenesis...
April 10, 2017: Macromolecular Bioscience
https://www.readbyqxmd.com/read/28386853/assessment-of-bone-regeneration-of-a-tissue-engineered-bone-complex-using-human-dental-pulp-stem-cells-poly-%C3%AE%C2%B5-caprolactone-biphasic-calcium-phosphate-scaffold-constructs-in-rabbit-calvarial-defects
#18
Natkrita Wongsupa, Thongchai Nuntanaranont, Suttatip Kamolmattayakul, Nuttawut Thuaksuban
The objective of the present study was to investigate the effect of a fabricated combination of poly-ɛ-caprolactone (PCL)-biphasic calcium phosphate (BCP) with the modified melt stretching and multilayer deposition (mMSMD) technique on human dental pulp stem cell (hDPSC) differentiation to be osteogenic like cells for bone regeneration of calvarial defects in rabbit models. hDPSCs extracted from human third molars were seeded onto mMSMD PCL-BCP scaffolds and the osteogenic gene expression was tested prior to implantation in vivo...
May 2017: Journal of Materials Science. Materials in Medicine
https://www.readbyqxmd.com/read/28386245/molecular-mechanisms-of-stem-progenitor-cell-maintenance-in-the-adrenal-cortex
#19
REVIEW
Antonio Marcondes Lerario, Isabella Finco, Christopher LaPensee, Gary Douglas Hammer
The adrenal cortex is characterized by three histologically and functionally distinct zones: the outermost zona glomerulosa (zG), the intermediate zona fasciculata, and the innermost zona reticularis. Important aspects of the physiology and maintenance of the adrenocortical stem/progenitor cells have emerged in the last few years. Studies have shown that the adrenocortical cells descend from a pool of progenitors that are localized in the subcapsular region of the zG. These cells continually undergo a process of centripetal displacement and differentiation, which is orchestrated by several paracrine and endocrine cues, including the pituitary-derived adrenocorticotrophic hormone, and angiotensin II...
2017: Frontiers in Endocrinology
https://www.readbyqxmd.com/read/28386167/efficient-purification-protocol-for-bioengineering-allophycocyanin-trimer-with-n-terminus-histag
#20
Wenjun Li, Yang Pu, Na Gao, Zhihong Tang, Lufei Song, Song Qin
Allophycocyanin plays a key role for the photon energy transfer from the phycobilisome to reaction center chlorophylls with high efficiency in cyanobacteria. Previously, the high soluble self-assembled bioengineering allophycocyanin trimer with N-terminus polyhistidine from Synechocystis sp. PCC 6803 had been successfully recombined and expressed in Escherichia coli strain. The standard protocol with immobilized metal-ion affinity chromatography with chelating transition metal ion (Ni(2+)) was used to purify the recombinant protein...
March 2017: Saudi Journal of Biological Sciences
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