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https://www.readbyqxmd.com/read/29339735/phenotype-and-functional-features-of-human-telomerase-reverse-transcriptase-immortalized-human-airway-smooth-muscle-cells-from-asthmatic-and-non-asthmatic-donors
#1
J K Burgess, A Ketheson, A Faiz, K A Limbert Rempel, B G Oliver, J P T Ward, A J Halayko
Asthma is an obstructive respiratory disease characterised by chronic inflammation with airway hyperresponsiveness. In asthmatic airways, there is an increase in airway smooth muscle (ASM) cell bulk, which differs from non-asthmatic ASM in characteristics. This study aimed to assess the usefulness of hTERT immortalisation of human ASM cells as a research tool. Specifically we compared proliferative capacity, inflammatory mediator release and extracellular matrix (ECM) production in hTERT immortalised and parent primary ASM cells from asthmatic and non-asthmatic donors...
January 16, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29330282/population-dependent-intron-retention-and-dna-methylation-in-breast-cancer
#2
Dongwook Kim, Manu Shivakumar, Seonggyun Han, Michael S Sinclair, Youngji Lee, Yonglan Zheng, Olufunmilayo I Olopade, Dokyoon Kim, Younghee Lee
Regulation of gene expression by DNA methylation in gene promoter regions is well-studied; however, the effects of methylation in the gene body (exons and introns) on gene expression are comparatively understudied. Recently, hyper-methylation has been implicated in the inclusion of alternatively spliced exons; moreover, exon recognition can be enhanced by recruiting the methyl-CpG-binding protein (MeCP2) to hyper-methylated sites. This study examines if methylation status of an intron is correlated with how frequently the intron is retained during splicing using DNA methylation and RNA sequencing (RNA-seq) data from breast cancer tissue specimens in The Cancer Genome Atlas (TCGA)...
January 12, 2018: Molecular Cancer Research: MCR
https://www.readbyqxmd.com/read/29296857/effects-of-daratumumab-on-natural-killer-cells-and-impact-on-clinical-outcomes-in-relapsed-or-refractory-multiple-myeloma
#3
Tineke Casneuf, Xu Steven Xu, Homer C Adams, Amy E Axel, Christopher Chiu, Imran Khan, Tahamtan Ahmadi, Xiaoyu Yan, Sagar Lonial, Torben Plesner, Henk M Lokhorst, Niels W C J van de Donk, Pamela L Clemens, A Kate Sasser
Daratumumab, a human CD38 imunoglobulin G 1κ monoclonal antibody, has demonstrated clinical activity and a manageable safety profile in monotherapy and combination therapy clinical trials in relapsed and/or refractory multiple myeloma. CD38 is expressed at high levels on myeloma cells and, to a lesser extent, on immune effector cells, including natural killer (NK) cells, which are important for daratumumab-mediated antibody-dependent cellular cytotoxicity (ADCC). Here, the pharmacodynamic effects of daratumumab monotherapy on NK cells, and the effect of NK cell dynamics on daratumumab efficacy and safety, were assessed...
October 24, 2017: Blood Advances
https://www.readbyqxmd.com/read/29282742/evaluation-of-the-impact-of-a-personalized-postdonation-short-messaging-service-on-the-retention-of-whole-blood-donors
#4
Carley N Gemelli, Alison Carver, Alana Garn, Stephen T Wright, Tanya E Davison
BACKGROUND: Short messaging service (SMS) is routinely used by blood collection agencies to remind donors about appointments but has been applied less frequently in interventions to increase return behavior. This study aimed to investigate whether receipt of a personalized postdonation SMS promoted donor retention. STUDY DESIGN AND METHODS: A postdonation SMS was sent to 2605 whole blood donors who had donated at one of six donor centers in Australia from April to July 2015 and left without making a forward appointment...
December 28, 2017: Transfusion
https://www.readbyqxmd.com/read/29250596/glucose-stimulated-insulin-response-of-silicon-nanopore-immunoprotected-islets-under-convective-transport
#5
Shang Song, Raymond Yeung, Jaehyun Park, Andrew M Posselt, Tejal A Desai, Qizhi Tang, Shuvo Roy
Major clinical challenges associated with islet transplantation for type 1 diabetes include shortage of donor organs, poor engraftment due to ischemia, and need for immunosuppressive medications. Semipermeable membrane capsules can immunoprotect transplanted islets by blocking passage of the host's immune components while providing exchange of glucose, insulin, and other small molecules. However, capsules-based diffusive transport often exacerbates ischemic injury to islets by reducing the rate of oxygen and nutrient transport...
June 12, 2017: ACS Biomaterials Science & Engineering
https://www.readbyqxmd.com/read/29235857/second-sphere-effects-in-dinuclear-feiiiznii-hydrolase-biomimetics-tuning-binding-and-reactivity-properties
#6
Tiago Pacheco Camargo, Ademir Neves, Rosely A Peralta, Cláudia Chaves, Elene C P Maia, Edgar H Lizarazo-Jaimes, Dawidson A Gomes, Tiago Bortolotto, Douglas R Norberto, Hernán Terenzi, David L Tierney, Gerhard Schenk
Herein, we report the synthesis and characterization of two dinuclear FeIIIZnII complexes [FeIIIZnIILP1] (1) and [FeIIIZnIILP2] (2), in which LP1 and LP2 are conjugated systems containing one and two pyrene groups, respectively, connected via the diamine -HN(CH2)4NH- spacer to the well-known N5O2-donor H2L ligand (H2L = 2-bis{[(2-pyridylmethyl)aminomethyl]-6-[(2-hydroxybenzyl)(2-pyridylmethyl)]aminomethyl}-4-methylphenol). The complex [FeIIIZnIIL1] (3), in which H2L was modified to H2L1, with a carbonyl group attached to the terminal phenol group, was included in this study for comparison purposes...
December 13, 2017: Inorganic Chemistry
https://www.readbyqxmd.com/read/29223705/functional-hepatocyte-clusters-on-bioactive-blend-silk-matrices-towards-generating-bioartificial-liver-constructs
#7
Guru Janani, Samit K Nandi, Biman B Mandal
The creation of in vitro functional hepatic tissue simulating micro-environmental niche of native liver is a keen area of research due to its demand in bioartificial liver (BAL) and cell-based tissue engineering. Here, we investigated the potential of novel blend (BA) silk scaffold fabricated by blending mulberry (Bombyx mori, BM) silk fibroin with cell adhesion motif (RGD) rich non-mulberry (Antheraea assamensis, AA) silk fibroin in generating a functional liver construct. Three-dimensional (3D) porous silk scaffolds (BM, AA and BA) were physico-chemically characterized and functionally evaluated using human hepatocarcinoma cells (HepG2) and primary neonatal rat hepatocytes...
December 6, 2017: Acta Biomaterialia
https://www.readbyqxmd.com/read/29223224/combined-interface-tattooing-and-fibrin-glue-assisted-sutureless-corneal-resurfacing-with-donor-lenticule-obtained-from-small-incision-lenticule-extraction-for-limbal-dermoid
#8
Soosan Jacob, Smita Narasimhan, Amar Agarwal, Athiya Agarwal, Saijimol Ai
We describe a technique of small-incision lenticule extraction (SMILE)-assisted sutureless corneal resurfacing with interface tattooing for superficial limbal dermoids. After excision at a plane minimally below surrounding normal cornea and sclera, a corneal tattoo powder is carefully applied within an inked circular outline of the intended corneal margin. Circularity and cosmesis are assessed in natural light with the microscope light off. Fibrin glue-assisted corneal resurfacing is performed with the lenticule...
November 2017: Journal of Cataract and Refractive Surgery
https://www.readbyqxmd.com/read/29221760/substrate-specificity-and-transfucosylation-activity-of-gh29-%C3%AE-l-fucosidases-for-enzymatic-production-of-human-milk-oligosaccharides
#9
Birgitte Zeuner, Jan Muschiol, Jesper Holck, Mateusz Lezyk, Mattias Raae Gedde, Carsten Jers, Jørn Dalgaard Mikkelsen, Anne S Meyer
Human milk oligosaccharides (HMOs) constitute a unique family of bioactive lactose-based molecules present in human breast milk. HMOs are of major importance for infant health and development but also virtually absent from bovine milk used for infant formula. Among the HMOs, the fucosylated species are the most abundant. Transfucosylation catalysed by retaining α-L-fucosidases is a new route for manufacturing biomimetic HMOs. Seven α-L-fucosidases from glycosyl hydrolase family 29 were expressed, characterized in terms of substrate specificity and thermal stability, and shown to be able to catalyse transfucosylation...
December 5, 2017: New Biotechnology
https://www.readbyqxmd.com/read/29218666/transition-from-laparoscopic-to-retroperitoneoscopic-approach-for-live-donor-nephrectomy
#10
Zi Qin Ng, Gabrielle Musk, Alethea Rea, Bulang He
BACKGROUND: Laparoscopic donor nephrectomy has become the standard of care due to multiple benefits. Currently, there are various techniques employed with two different approaches: transperitoneal (TLDN) or retroperitoneoscopic (RLDN) approach. There is a lack of data to determine which technique is superior, although the RLDN offers an anatomical advantage by avoidance of manipulation of the intraperitoneal organs. The aims of this study were to explore the merits of RLDN to TLDN and assess the learning curve of transition from TLDN to RLDN...
December 7, 2017: Surgical Endoscopy
https://www.readbyqxmd.com/read/29214523/haematopoietic-stem-cell-transplantation-arrests-the-progression-of-neurodegenerative-disease-in-late-onset-tay-sachs-disease
#11
Karolina M Stepien, Su Han Lum, J Edmond Wraith, Christian J Hendriksz, Heather J Church, David Priestman, Frances M Platt, Simon Jones, Ana Jovanovic, Robert Wynn
Tay-Sachs disease is a rare metabolic disease caused by a deficiency of hexosaminidase A that leads to accumulation of GM2 gangliosides predominantly in neural tissue. Late-onset Tay-Sachs disease variant is associated with a higher level of residual HexA activity. Treatment options are limited, and there are a few described cases who have undergone haematopoietic stem cell transplantation (HSCT) with variable outcome.We describe a case of a 23-year-old male patient who presented with a long-standing tremor since 7 years of age...
December 7, 2017: JIMD Reports
https://www.readbyqxmd.com/read/29211918/decellularized-human-placenta-supports-hepatic-tissue-and-allows-rescue-in-acute-liver-failure
#12
Zurab Kakabadze, Anne Kakabadze, David Chakhunashvili, Lika Karalashvili, Ekaterine Berishvili, Yogeshwar Sharma, Sanjeev Gupta
Tissue engineering with scaffolds to form transplantable organs is of wide interest. Decellularized tissues have been tested for this purpose, although supplies of healthy donor tissues, vascular recellularization for perfusion and tissue homeostasis in engineered organs pose challenges. We hypothesized decellularized human placenta will be suitable for tissue engineering. The universal availability and unique structures of placenta for accommodating tissue, including presence of embedded vessels, were major attractions...
December 6, 2017: Hepatology: Official Journal of the American Association for the Study of Liver Diseases
https://www.readbyqxmd.com/read/29194668/is-an-endoscopic-examination-associated-with-transfusion-transmissible-infections-a-systematic-review-and-meta-analysis
#13
REVIEW
Hans Van Remoortel, Vere Borra, Emmy De Buck, Veerle Compernolle, Philippe Vandekerckhove
BACKGROUND: The purpose of a donor medical questionnaire is to identify the blood donor's history relative to the current known blood-safety risks. A temporary deferral from blood donation after an endoscopic examination is enforced because of the reusable nature of the endoscope and close contact with the inner body. The objective of this systematic review was to find the best available evidence on the association between an endoscopic examination and the risk of transfusion-transmissible infections...
November 30, 2017: Transfusion
https://www.readbyqxmd.com/read/29191109/utilization-of-an-intermediate-of-the-methylerythritol-phosphate-pathway-e-4-hydroxy-3-methylbut-2-en-1-yl-diphosphate-as-the-prenyl-donor-substrate-for-various-prenyltransferases
#14
Yoshifumi Hayashi, Tomokazu Ito, Tohru Yoshimura, Hisashi Hemmi
(E)-4-hydroxy-3-methylbut-2-en-1-yl diphosphate (HMBPP) is an intermediate of the methylerythritol phosphate pathway. Utilization of HMBPP by lycopene elongase from Corynebacterium glutamicum, which is a UbiA-family prenyltransferase responsible for C50 carotenoid biosynthesis, was investigated using an Escherichia coli strain that contained the exogenous mevalonate pathway as well as the carotenoid biosynthetic pathway. Inhibition of the endogenous methylerythritol phosphate pathway resulted in loss of the production of C50 carotenoid flavuxanthin, while C40 lycopene formation was retained...
December 1, 2017: Bioscience, Biotechnology, and Biochemistry
https://www.readbyqxmd.com/read/29188626/-polymorphism-of-rhd-gene-among-rhd-negative-and-d-variant-blood-donors-from-qingdao-region
#15
Bin Hu, Zhihui Feng, Yuli Zhu
OBJECTIVE: To study the molecular mechanism and polymorphism of D gene of RhD negative and D variants among voluntary blood donors from Qingdao region. METHODS: For 220 D-negative phenotype cases and 5 D variant cases confirmed by serological test, exons 1 to 10 of the RHD gene were detected by a PCR-SSP method. The samples which contain all or part of the exons were sequenced. RESULTS: Among the 220 cases, 166 (75.45%) had complete absence of the RHD gene, while 54 (24...
December 10, 2017: Zhonghua Yi Xue Yi Chuan Xue za Zhi, Zhonghua Yixue Yichuanxue Zazhi, Chinese Journal of Medical Genetics
https://www.readbyqxmd.com/read/29188402/development-and-characterisation-of-a-large-diameter-decellularised-vascular-allograft
#16
A Aldridge, A Desai, H Owston, L M Jennings, J Fisher, P Rooney, J N Kearney, E Ingham, S P Wilshaw
The aims of this study were to develop a biological large diameter vascular graft by decellularisation of native human aorta to remove the immunogenic cells whilst retaining the essential biomechanical, and biochemical properties for the ultimate benefit of patients with infected synthetic grafts. Donor aortas (n = 6) were subjected to an adaptation of a propriety decellularisation process to remove the cells and acellularity assessed by histological analysis and extraction and quantification of total DNA...
November 29, 2017: Cell and Tissue Banking
https://www.readbyqxmd.com/read/29187041/restrictive-cardiomyopathy-or-constrictive-pericarditis-an-unresolved-conundrum
#17
Gregory Ho, Ed Peng, Antony Hermuzi, Asif Hasan
Cardiomyopathy may have a variety of causes and may lead to significant morbidity. Often, there is no "perfect" treatment. New investigative techniques may add insight but retain the possibility of uncertainty. The distinction between restrictive cardiomyopathy and pericardial constriction may be challenging, particularly when considering the incidence of these entities. This distinction may significantly impact patient management and this is becoming increasingly important in the context of donor organ austerity...
January 1, 2017: World Journal for Pediatric & Congenital Heart Surgery
https://www.readbyqxmd.com/read/29172152/safety-and-immune-regulatory-properties-of-canine-induced-pluripotent-stem-cell-derived-mesenchymal-stem-cells
#18
Lyndah Chow, Valerie Johnson, Dan Regan, William Wheat, Saiphone Webb, Peter Koch, Steven Dow
Mesenchymal stem cells (MSCs) exhibit broad immune modulatory activity in vivo and can suppress T cell proliferation and dendritic cell activation in vitro. Currently, most MSC for clinical usage are derived from younger donors, due to ease of procurement and to the superior immune modulatory activity. However, the use of MSC from multiple unrelated donors makes it difficult to standardize study results and compare outcomes between different clinical trials. One solution is the use of MSC derived from induced pluripotent stem cells (iPSC); as iPSC-derived MSC have nearly unlimited proliferative potential and exhibit in vitro phenotypic stability...
November 14, 2017: Stem Cell Research
https://www.readbyqxmd.com/read/29164052/development-of-novel-patient-derived-xenografts-from-breast-cancer-brain-metastases
#19
María J Contreras-Zárate, D Ryan Ormond, Austin E Gillen, Colton Hanna, Nicole L Day, Natalie J Serkova, Britta M Jacobsen, Susan M Edgerton, Ann D Thor, Virginia F Borges, Kevin O Lillehei, Michael W Graner, Peter Kabos, Diana M Cittelly
Brain metastases are an increasing burden among breast cancer patients, particularly for those with HER2(+) and triple negative (TN) subtypes. Mechanistic insight into the pathophysiology of brain metastases and preclinical validation of therapies has relied almost exclusively on intracardiac injection of brain-homing cells derived from highly aggressive TN MDA-MB-231 and HER2(+) BT474 breast cancer cell lines. Yet, these well characterized models are far from representing the tumor heterogeneity observed clinically and, due to their fast progression in vivo, their suitability to validate therapies for established brain metastasis remains limited...
2017: Frontiers in Oncology
https://www.readbyqxmd.com/read/29143346/a-comparative-view-on-the-potential-acting-on-an-electron-in-a-molecule-and-the-electrostatic-potential-through-the-typical-halogen-bonds
#20
Ekaterina Bartashevich, Vladimir Tsirelson
This work considers the features of the electrostatic potential (ESP), and the potential acting on an electron in a molecule (PAEM) for the series of isolated dihalide molecules and for their molecular complexes. The joint analysis of these functions enriches the vision of atomic predispositions to the halogen bond formation and reveals details for their characterization. The account for the exchange-correlation interaction in PAEM retains the specific anisotropy of the ESP, which is commonly used for the halogen bonding explanation within σ-hole concept...
November 15, 2017: Journal of Computational Chemistry
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