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https://www.readbyqxmd.com/read/29120819/towards-a-defined-ecm-and-small-molecule-based-monolayer-culture-system-for-the-expansion-of-mouse-and-human-intestinal-stem-cells
#1
Zhixiang Tong, Keir Martyn, Andy Yang, Xiaolei Yin, Benjamin E Mead, Nitin Joshi, Nicholas E Sherman, Robert S Langer, Jeffrey M Karp
Current ISC culture systems face significant challenges such as animal-derived or undefined matrix compositions, batch-to-batch variability (e.g. Matrigel-based organoid culture), and complexity of assaying cell aggregates such as organoids which renders the research and clinical translation of ISCs challenging. Here, through screening for suitable ECM components, we report a defined, collagen based monolayer culture system that supports the growth of mouse and human intestinal epithelial cells (IECs) enriched for an Lgr5(+) population comparable or higher to the levels found in a standard Matrigel-based organoid culture...
October 26, 2017: Biomaterials
https://www.readbyqxmd.com/read/29099849/low-dose-naltrexone-in-multiple-sclerosis-effects-on-medication-use-a-quasi-experimental-study
#2
Guttorm Raknes, Lars Småbrekke
Low dose naltrexone (LDN) has become a popular off-label therapy for multiple sclerosis (MS). A few small, randomized studies indicate that LDN may have beneficial effects in MS and other autoimmune diseases. If proven efficacious, it would be a cheap and safe alternative to the expensive treatments currently recommended for MS. We investigated whether a sudden increase in LDN use in Norway in 2013 was followed by changes in dispensing of other medications used to treat MS. We performed a quasi-experimental before-and-after study based on population data from the Norwegian Prescription Database (NorPD)...
2017: PloS One
https://www.readbyqxmd.com/read/29090430/hybrid-incompatibilities-in-interspecific-crosses-between-tetraploid-wheat-and-its-wild-diploid-relative-aegilops-umbellulata
#3
Moeko Okada, Kentaro Yoshida, Shigeo Takumi
Hybrid abnormalities, severe growth abortion and grass-clump dwarfism, were found in the tetraploid wheat/Aegilops umbellulata hybrids, and the gene expression changes were conserved in the hybrids with those in other wheat synthetic hexaploids. Aegilops umbellulata Zhuk., a diploid goatgrass species with a UU genome, has been utilized as a genetic resource for wheat breeding. Here, we examine the reproductive barriers between tetraploid wheat cultivar Langdon (Ldn) and various Ae. umbellulata accessions by conducting interspecific crossings...
October 31, 2017: Plant Molecular Biology
https://www.readbyqxmd.com/read/29055717/development-of-3d-culture-models-of-plexiform-neurofibroma-and-initial-application-for-phenotypic-characterization-and-drug-screening
#4
REVIEW
Janice M Kraniak, Anita Chalasani, Margaret R Wallace, Raymond R Mattingly
Plexiform neurofibromas (PNs), which may be present at birth in up to half of children with type 1 neurofibromatosis (NF1), can cause serious loss of function, such as quadriparesis, and can undergo malignant transformation. Surgery is the first line treatment although the invasive nature of these tumors often prevents complete resection. Recent clinical trials have shown promising success for some drugs, notably selumetinib, an inhibitor of MAP kinase kinase (MEK). We have developed three-dimensional (3D) cell culture models of immortalized cells from NF1 PNs and of control Schwann cells (SCs) that we believe mimic more closely the in vivo condition than conventional two-dimensional (2D) cell culture...
October 18, 2017: Experimental Neurology
https://www.readbyqxmd.com/read/29037963/conversion-between-noise-exposure-indicators-leq24h-lday-levening-lnight-ldn-and-lden-principles-and-practical-guidance
#5
Mark Brink, Beat Schäffer, Reto Pieren, Jean Marc Wunderli
This article presents empirically derived conversion rules between the environmental noise exposure metrics Leq24h, LDay, LEvening, LNight, Ldn, and Lden for the noise sources road, rail and air traffic. It caters to researchers that need to estimate the value of one (unknown) noise metric from the value of another (known) metric, e.g. in the scope of epidemiological meta-analyses or systematic reviews, when results from different studies are pooled and need to be related to one common exposure metric. Conversion terms are derived using two empirical methods a) based on analyzing the diurnal variation of traffic, and b) by analyzing differences between calculated noise exposure metrics...
October 9, 2017: International Journal of Hygiene and Environmental Health
https://www.readbyqxmd.com/read/28991360/low-dose-naltrexone-a-novel-treatment-for-hailey-hailey-disease
#6
V Campbell, C McGrath, A Corry
Hailey-Hailey disease (chronic benign familial pemphigus) is a rare inherited dermatosis typically characterised by erosions at intertriginous sites preceded by minor trauma or stress. We report a case of treatment resistant Hailey-Hailey disease, having failed topical and oral steroids, prophylactic acyclovir and doxycycline, and systemic therapies including dapsone, acitretin and ciclosporin. Low dose naltrexone (LDN) 4.5mg one daily was commenced following an incidental benefit in this patient's similarly affected sister...
October 9, 2017: British Journal of Dermatology
https://www.readbyqxmd.com/read/28985892/laparoscopic-donor-nephrectomy-a-single-institution-minimally-invasive-general-surgeon-experience-1999-2013
#7
Benjamin Raber, Matthew Westmoreland, David Arnold, Butch Derek, Richard Lueking, Grace Lassiter, Elizabeth Nguyen
BACKGROUND: Laparoscopic donor nephrectomy (LDN) is the standard of care for donor nephrectomies. No large series reports have been published detailing the LDN experience of minimally invasive general surgeons. METHODS: A retrospective review of 526 LDNs performed by MIS general surgeons at Baylor University Medical Center between 1999 and 2013. Complications were graded on the Clavien scale. The learning curve was determined by procedure time. RESULTS: The complication rate was 3...
September 29, 2017: American Journal of Surgery
https://www.readbyqxmd.com/read/28924138/perioperative-ketorolac-use-a-potential-risk-factor-for-renal-dysfunction-after-live-donor-nephrectomy
#8
Kazuhiro Takahashi, Anita K Patel, Shunji Nagai, Mohamed Safwan, Krishna G Putchakayala, William J Kane, Lauren E Malinzak, Jason E Denny, Atsushi Yoshida, Dean Y Kim
BACKGROUND Ketorolac is a nonsteroidal anti-inflammatory drug indicated for pain control after surgeries in many fields. The aim of this study was to evaluate the impact of ketorolac use after live-donor nephrectomy (LDN). MATERIAL AND METHODS We reviewed data on 251 patients who underwent laparoscopic LDN from April 2008 to March 2016. Ketorolac was given to 167 patients intraoperatively or postoperatively within 24 h after LDN. Glomerular filtration rate (GFR) percentage was defined as postoperative GFR/preoperative GFR...
September 19, 2017: Annals of Transplantation: Quarterly of the Polish Transplantation Society
https://www.readbyqxmd.com/read/28918311/structural-basis-for-the-potent-and-selective-binding-of-ldn-212854-to-the-bmp-receptor-kinase-alk2
#9
Eleanor Williams, Alex N Bullock
Individuals with the rare developmental disorder fibrodysplasia ossificans progressiva (FOP) experience disabling heterotopic ossification caused by a gain of function mutation in the intracellular region of the BMP type I receptor kinase ALK2, encoded by the gene ACVR1. Small molecule BMP type I receptor inhibitors that block this ossification in FOP mouse models have been derived from the pyrazolo[1,5-a]pyrimidine scaffold of dorsomorphin. While the first derivative LDN-193189 exhibited pan inhibition of BMP receptors, the more recent compound LDN-212854 has shown increased selectivity for ALK2...
September 12, 2017: Bone
https://www.readbyqxmd.com/read/28901574/using-a-multi-feature-paradigm-to-measure-mismatch-responses-to-minimal-sound-contrasts-in-children-with-cochlear-implants-and-hearing-aids
#10
Inger Uhlén, Elisabet Engström, Petter Kallioinen, Cecilia Nakeva von Mentzer, Björn Lyxell, Birgitta Sahlén, Magnus Lindgren, Marianne Ors
Our aim was to explore whether a multi-feature paradigm (Optimum-1) for eliciting mismatch negativity (MMN) would objectively capture difficulties in perceiving small sound contrasts in children with hearing impairment (HI) listening through their hearing aids (HAs) and/or cochlear implants (CIs). Children aged 5-7 years with HAs, CIs and children with normal hearing (NH) were tested in a free-field setting using a multi-feature paradigm with deviations in pitch, intensity, gap, duration, and location. There were significant mismatch responses across all subjects that were positive (p-MMR) for the gap and pitch deviants (F(1,43) = 5...
October 2017: Scandinavian Journal of Psychology
https://www.readbyqxmd.com/read/28893633/enhanced-recovery-open-vs-laparoscopic-left-donor-nephrectomy-a-randomized-controlled-trial
#11
Ahmed M Mansour, Ahmed R El-Nahas, Bedeir Ali-El-Dein, Ahmed A Denewar, Mohammed A Abbas, Ahmed Abdel-Rahman, Ibrahim Eraky, Ahmed A Shokeir
OBJECTIVE: To compare recovery outcomes between laparoscopic donor nephrectomy (LDN) and open donor nephrectomy within a specified enhanced recovery program (ERP) for left kidney donations. PATIENTS AND METHODS: A phase III randomized trial was conducted between January 2013 and June 2015; eligible left-side donors were randomized to laparoscopic or open donor nephrectomy in a 1:1 ratio with recovery optimized within a standardized ERP. The primary outcome was patient-reported measure of physical fatigue, as measured by the physical fatigue domain of the translated Multidimensional Fatigue Inventory 20...
September 8, 2017: Urology
https://www.readbyqxmd.com/read/28871577/right-retroperitoneoscopic-living-donor-nephrectomy-does-not-increase-surgical-complications-in-the-recipient-and-leads-to-excellent-long-term-outcome
#12
Maria Johanna Schaumeier, Alexandra Nagy, Salome Dell-Kuster, Rachel Rosenthal, Stefan Schaub, Michael Dickenmann, Lorenz Gurke, Thomas Wolff
BACKGROUND: Right-sided retroperitoneoscopic living donor nephrectomy (LDN) has been shown to be safe for the donor but it is unknown whether the short renal vein is associated with complications or an impaired long-term outcome in the recipient. METHODS: In this retrospective cohort study, consecutive transplant recipients after retroperitoneoscopic LDN were enrolled. Complications occurring within 1 year were classified according to the Clavien-Dindo Classification for Surgical Complications and analysed using multivariable logistic regression...
September 5, 2017: Swiss Medical Weekly
https://www.readbyqxmd.com/read/28861703/robotic-assisted-vs-laparoscopic-donor-nephrectomy-a-retrospective-comparison-of-perioperative-course-and-postoperative-outcome-after-1-year
#13
Anthony Yang, Naman Barman, Edward Chin, Daniel Herron, Antonios Arvelakis, Dianne LaPointe Rudow, Sander S Florman, Michael A Palese
Safety is of utmost importance in live donor nephrectomies. In this study, we describe our initial experience with robot-assisted laparoscopic donor nephrectomy (RDN) in comparison with the standard laparoscopic donor nephrectomy (LDN). We retrospectively reviewed 95 patients who either underwent RDN or LDN performed by a single surgeon from 2011 to 2016 at a tertiary institution. Donor perioperative course and postoperative outcome along with recipient outcomes were compared. Of the 95 cases, 73 were classified as LDN and 22 were classified as RDN...
August 31, 2017: Journal of Robotic Surgery
https://www.readbyqxmd.com/read/28838258/the-protective-effects-of-bone-morphogenetic-protein-7-against-epithelial-injury-and-matrix-metalloproteases-upregulation-induced-by-silica-in-vitro
#14
D Liang, G An, Z Zhu, Y Wang, G Yang, X Li, P Niu, L Chen, L Tian
OBJECTIVE: We investigate the effects of bone morphogenetic protein-7 (BMP-7) on models with silica-induced and macrophage-mediated fibrosis and its possible mechanisms in vitro. METHODS: Rat alveolar II epithelial (RLE-6TN) cells were incubated with the supernatant of mouse macrophage-like cells (RAW264.7) and treated with 0, 25, 50, and 100 μg/mL silica. Using Western blotting, the epithelial markers (surfactant proteins-C and E-cadherin) and the mesenchymal markers (fibronectin (FN) and viminten (Vim)) were detected...
September 2017: Human & Experimental Toxicology
https://www.readbyqxmd.com/read/28768899/aberrant-perichondrial-bmp-signaling-mediates-multiple-osteochondromagenesis-in-mice
#15
Toshihiro Inubushi, Satoshi Nozawa, Kazu Matsumoto, Fumitoshi Irie, Yu Yamaguchi
Multiple hereditary exostoses (MHE) is characterized by the development of numerous benign bony tumors (osteochondromas). Although it has been well established that MHE is caused by mutations in EXT1 and EXT2, which encode glycosyltransferase essential for heparan sulfate (HS) biosynthesis, the cellular origin and molecular mechanisms of MHE remain elusive. Here, we show that in Ext1 mutant mice, osteochondromas develop from mesenchymal stem cell-like progenitor cells residing in the perichondrium, and we show that enhanced BMP signaling in these cells is the primary signaling defect that leads to osteochondromagenesis...
August 3, 2017: JCI Insight
https://www.readbyqxmd.com/read/28766982/featured-article-serum-met-5-enkephalin-levels-are-reduced-in-multiple-sclerosis-and-restored-by-low-dose-naltrexone
#16
Michael D Ludwig, Ian S Zagon, Patricia J McLaughlin
Low-dose naltrexone is a widely used off-label therapeutic prescribed for a variety of immune-related disorders. The mechanism underlying low-dose naltrexone's efficacy for fatigue, Crohn's disease, fibromyalgia, and multiple sclerosis is, in part, intermittent blockade of opioid receptors followed by upregulation of endogenous opioids. Short, intermittent blockade by naltrexone specifically blocks the opioid growth factor receptor resulting in biofeedback events that increase production of the endogenous opioid growth factor (OGF) (chemically termed [Met(5)]-enkephalin) facilitating interactions between opioid growth factor and opioid growth factor receptor that ultimately, result in inhibited cell proliferation...
September 2017: Experimental Biology and Medicine
https://www.readbyqxmd.com/read/28735988/comparison-of-both-sides-for-retroperitoneal-laparoscopic-donor-nephrectomy-experience-from-a-single-center-in-china
#17
Y Qiu, X Wang, T Song, Z Rao, J Liu, Z Huang, T Lin
BACKGROUND: Laparoscopic donor nephrectomy (LDN) has gradually become the main approach to obtain live donor kidneys. However, the shorter right renal vein limits its wider application. The aim of this study was to compare the outcomes of left- and right-side retroperitoneal LDN. METHODS: We reviewed the perioperative data of 527 consecutive donors receiving retroperitoneal pure LDN with a new method at our center between April 2009 and April 2014. The patients were divided into group A (the first 100 patients) and group B (the remaining 427 patients)...
July 2017: Transplantation Proceedings
https://www.readbyqxmd.com/read/28716575/strategic-targeting-of-multiple-bmp-receptors-prevents-trauma-induced-heterotopic-ossification
#18
Shailesh Agarwal, Shawn J Loder, Christopher Breuler, John Li, David Cholok, Cameron Brownley, Jonathan Peterson, Hsiao H Hsieh, James Drake, Kavitha Ranganathan, Yashar S Niknafs, Wenzhong Xiao, Shuli Li, Ravindra Kumar, Ronald Tompkins, Michael T Longaker, Thomas A Davis, Paul B Yu, Yuji Mishina, Benjamin Levi
Trauma-induced heterotopic ossification (tHO) is a condition of pathologic wound healing, defined by the progressive formation of ectopic bone in soft tissue following severe burns or trauma. Because previous studies have shown that genetic variants of HO, such as fibrodysplasia ossificans progressiva (FOP), are caused by hyperactivating mutations of the type I bone morphogenetic protein receptor (T1-BMPR) ACVR1/ALK2, studies evaluating therapies for HO have been directed primarily toward drugs for this specific receptor...
August 2, 2017: Molecular Therapy: the Journal of the American Society of Gene Therapy
https://www.readbyqxmd.com/read/28643056/deep-neuromuscular-blockade-improves-surgical-conditions-during-low-pressure-pneumoperitoneum-laparoscopic-donor-nephrectomy
#19
D M D Özdemir-van Brunschot, A E Braat, M F P van der Jagt, G J Scheffer, C H Martini, J F Langenhuijsen, R E Dam, V A Huurman, D Lam, F C d'Ancona, A Dahan, M C Warlé
BACKGROUND: Evidence indicates that low-pressure pneumoperitoneum (PNP) reduces postoperative pain and analgesic consumption. A lower insufflation pressure may hamper visibility and working space. The aim of the study is to investigate whether deep neuromuscular blockade (NMB) improves surgical conditions during low-pressure PNP. METHODS: This study was a blinded randomized controlled multicenter trial. 34 kidney donors scheduled for laparoscopic donor nephrectomy randomly received low-pressure PNP (6 mmHg) with either deep (PTC 1-5) or moderate NMB (TOF 0-1)...
June 22, 2017: Surgical Endoscopy
https://www.readbyqxmd.com/read/28611046/autocrine-bmp-4-signaling-is-a-therapeutic-target-in-colorectal-cancer
#20
Yuichiro Yokoyama, Toshiaki Watanabe, Yusuke Tamura, Yoshinobu Hashizume, Kohei Miyazono, Shogo Ehata
Poor prognoses for colorectal cancer patients with metastatic lesions have driven demand for the development of novel targeted therapies. Here, we demonstrate that expression of bone morphogenetic protein 4 (BMP-4) is universally upregulated in human colorectal cancer cells and tissues, resulting in activated BMP signaling. Inhibition of endogenous BMP signaling by the BMP type I receptor inhibitor LDN-193189 elevated expression of the phosphatase DUSP5 in colorectal cancer cells, inducing apoptosis via dephosphorylation of Erk MAPK...
August 1, 2017: Cancer Research
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