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https://www.readbyqxmd.com/read/29454069/recipient-characteristics-and-morbidity-and-mortality-after-liver-transplantation
#1
Sumeet K Asrani, Giovanna Saracino, Jacqueline G O'Leary, Stevan Gonzales, Peter Kim, Greg McKenna, Goran Klintmalm, James Trotter
BACKGROUND: Over the last decade, liver transplantation of sicker, older non-hepatitis C cirrhotics with multiple co-morbidities has increased in the United States. METHODS: We sought to identify a parsimonious set of recipient factors among HCV negative adult transplant recipients associated with significant morbidity and mortality within 5 years after liver transplantation using national (n=31,829, 2002-2015) and center specific data. Coefficients of relevant recipient factors were converted to weighted points and scaled from 0-5...
February 14, 2018: Journal of Hepatology
https://www.readbyqxmd.com/read/29453850/the-role-of-the-immune-system-in-kidney-disease
#2
REVIEW
Josefine Tecklenborg, David Clayton, Stefan Siebert, Shana M Coley
The immune system and the kidneys are closely linked. In health the kidneys contribute to immune homeostasis, while components of the immune system mediate many acute forms of renal disease and play a central role in progression of chronic kidney disease. A dysregulated immune system can have either direct or indirect renal effects. Direct immune-mediated kidney diseases are usually a consequence of autoantibodies directed against a constituent renal antigen, such as collagen IV in anti-glomerular basement membrane disease...
February 17, 2018: Clinical and Experimental Immunology
https://www.readbyqxmd.com/read/29453211/fistulation-between-a-colonic-j-pouch-and-the-upper-vagina-in-an-irradiated-pelvis-a-rare-complication-following-low-anterior-resection-with-colonic-j-pouch-anal-anastomosis-for-rectal-cancer
#3
James Tankel, Shlomo Yellineck, Petachia Reissman
Formation of a colonic J-pouch with anastomosis to the rectal stump is an accepted form of reconstruction after low anterior resection (LAR) for rectal carcinoma. It is thought this can help prevent the onset of LAR syndrome as well as improve the quality of life in the first two years following surgery. Rectovaginal fistulation is a recognised complication of this form of surgery usually occurring because of technical failure leading to inclusion of the vaginal wall into the stapled anastomosis. We present an as of yet unreported case of fistulation between the upper horizontal staple line of a colonic J-pouch-the tip of the 'J'-which was formed extracorporeally with the posterior vaginal fornix...
February 16, 2018: BMJ Case Reports
https://www.readbyqxmd.com/read/29453119/an-analysis-of-environmental-incidents-for-a-national-antarctic-program
#4
Shaun T Brooks, Julia Jabour, Andy J Sharman, Dana M Bergstrom
Research stations in Antarctica are concentrated on scarce ice-free habitats. Operating these stations in the harsh Antarctic climate provides many challenges, including the need to handle bulk fuel and cargo increasing the risk of environmental incidents. We examined 195 reports of environmental incidents from the Australian Antarctic Program, spanning six years, to investigate the impacts and pathways of contemporary environmental incidents. Fuel and chemical spills were most common, followed by biosecurity incursions...
February 13, 2018: Journal of Environmental Management
https://www.readbyqxmd.com/read/29452438/algorithmic-approach-for-intraoperative-salvage-of-venous-congestion-in-diep-flaps
#5
Erica L Bartlett, Dmitry Zavlin, Zachery K Menn, Aldona J Spiegel
BACKGROUND: Flap congestion is a frequently described intraoperative complication during autologous breast reconstruction with abdominal perforator flaps, which, if not addressed, can lead to detrimental results such as flap failure. Here, we describe our institution's algorithm of intraoperative salvage of congested flaps and present their outcomes. METHODS: All patient charts from 2002 to 2016 of a single plastic surgeon were reviewed for patients who underwent deep inferior epigastric perforator flap breast reconstruction resulting in 602 patients and 831 flaps...
February 16, 2018: Journal of Reconstructive Microsurgery
https://www.readbyqxmd.com/read/29452309/echocardiography-for-the-management-of-patients-with-biventricular-pacing-possible-roles-in-cardiac-resynchronization-therapy-implementation
#6
REVIEW
Emmanouil Poulidakis, Constantina Aggeli, Konstantinos Kappos, Antonis S Manolis, Skevos Sideris, Konstantinos Gatzoulis, Evangelos Oikonomou, Dimitrios Tousoulis
Cardiac Resynchronization Therapy (CRT) is an established therapeutic option for the subset of patients with heart failure (HF), reduced ejection fraction (EF) and dyssynchrony evidenced by electrocardiography. Benefit from CRT has been proven in many clinical trials, yet a sizeable proportion of these patients with wide QRS do not respond to this intervention, despite the updated practice guidelines. Several echocardiographic indices, targeting mechanical rather than electrical dyssynchrony, have been suggested to address this issue, but research so far has not succeeded in providing a single and simple measurement with adequate sensitivity and specificity for identification of responders...
February 13, 2018: Hellenic Journal of Cardiology: HJC, Hellēnikē Kardiologikē Epitheōrēsē
https://www.readbyqxmd.com/read/29452273/3d-bioprinted-functional-and-contractile-cardiac-tissue-constructs
#7
Zhan Wang, Sang Jin Lee, Heng-Jie Cheng, James J Yoo, Anthony Atala
Bioengineering of a functional cardiac tissue composed of primary cardiomyocytes has great potential for myocardial regeneration and in vitro tissue modeling. However, its applications remain limited because the cardiac tissue is a highly organized structure with unique physiologic, biomechanical, and electrical properties. In this study, we undertook a proof-of-concept study to develop a contractile cardiac tissue with cellular organization, uniformity, and scalability by using three-dimensional (3D) bioprinting strategy...
February 13, 2018: Acta Biomaterialia
https://www.readbyqxmd.com/read/29452157/hypertrophic-cardiomyopathy-mutation-r58q-in-the-myosin-regulatory-light-chain-perturbs-thick-filament-based-regulation-in-cardiac-muscle
#8
Thomas Kampourakis, Saraswathi Ponnam, Malcolm Irving
Hypertrophic cardiomyopathy (HCM) is frequently linked to mutations in the protein components of the myosin-containing thick filaments leading to contractile dysfunction and ultimately heart failure. However, the molecular structure-function relationships that underlie these pathological effects remain largely obscure. Here we chose an example mutation (R58Q) in the myosin regulatory light chain (RLC) that is associated with a severe HCM phenotype and combined the results from a wide range of in vitro and in situ structural and functional studies on isolated protein components, myofibrils and ventricular trabeculae to create an extensive map of structure-function relationships...
February 13, 2018: Journal of Molecular and Cellular Cardiology
https://www.readbyqxmd.com/read/29451983/reinforcing-mucus-barrier-properties-with-low-molar-mass-chitosans
#9
Sujit Kootala, Luimar Filho, Vaibhav Srivastava, Victoria Linderberg, Amani Moussa, Laurent David, Stéphane Trombotto, Thomas Crouzier
The mucus gel covers the wet epithelia that forms the inner lining of the body. It constitutes our first line of defense protecting the body from infections and other deleterious molecules. Failure of the mucus barrier can lead to the inflammation of the mucosa such as in inflammatory bowel diseases. Unfortunately, there are no effective strategies that reinforce the mucus barrier properties to recover or enhance its ability to protect the epithelium. Herein, we describe a mucus engineering approach that addresses this issue where we physically crosslink the mucus gel with low molar mass chitosan variants to reinforce its barrier functions...
February 16, 2018: Biomacromolecules
https://www.readbyqxmd.com/read/29451942/incidence-of-and-risk-factors-for-knee-collateral-ligament-injuries-with-proximal-tibia-fractures-a-study-of-32-441-patients
#10
Andre M Samuel, Pablo J Diaz-Collado, Lauren K Szolomayer, Daniel H Wiznia, Wayne W Chan, Adam M Lukasiewicz, Bryce A Basques, Daniel D Bohl, Jonathan N Grauer
Proximal tibia fractures are associated with concurrent collateral ligament injuries. Failure to recognize these injuries may lead to chronic knee instability. The purpose of this study was to identify risk factors for concurrent collateral ligament injuries with proximal tibia fractures and their association with inpatient outcomes. A total of 32,441 patients with proximal tibia fractures were identified in the 2011-2012 National Trauma Data Bank. A total of 1445 (4.5%) had collateral ligament injuries, 794 (2...
February 16, 2018: Orthopedics
https://www.readbyqxmd.com/read/29450742/focused-cardiac-ultrasound-as-a-predictor-of-readmission-in-acute-decompensated-heart-failure
#11
Luke J Laffin, Amit V Patel, Narayan Saha, Julian Barbat, James K Hall, Matthew Cain, Kishan Parikh, Jay Shah, Kirk T Spencer
Acute decompensated heart failure (ADHF) is a common reason for admission to the hospital, and readmission is frequent. Multiple factors contribute to rehospitalizations, but inadequate assessment of volume status leading to persistent congestion is an important factor. We sought to determine if focused cardiac ultrasound (FCU) of the inferior vena cava (IVC), as a surrogate of volume status, would predict readmission of ADHF patients after index hospitalization. Patients admitted with a primary diagnosis of ADHF were prospectively enrolled...
February 15, 2018: International Journal of Cardiovascular Imaging
https://www.readbyqxmd.com/read/29450407/changes-in-the-cardiac-ghsr1a-ghrelin-system-correlate-with-myocardial-dysfunction-in-diabetic-cardiomyopathy-in-mice
#12
Rebecca Sullivan, Rebecca McGirr, Shirley Hu, Alice Tan, Derek Wu, Carlie Charron, Tyler Lalonde, Edith Arany, Subrata Chakrabarti, Leonard Luyt, Savita Dhanvantari
Ghrelin and its receptor, the growth hormone secretagogue receptor 1a (GHSR1a), are present in cardiac tissue. Activation of GHSR1a by ghrelin promotes cardiomyocyte contractility and survival, and changes in myocardial GHSR1a and circulating ghrelin track with end-stage heart failure, leading to the hypothesis that GHSR1a is a biomarker for heart failure. We hypothesized that GHSR1a could also be a biomarker for diabetic cardiomyopathy (DCM). We used two models of streptozotocin (STZ)-induced DCM: group 1, adult mice treated with 35 mg/kg STZ for 3 days; and group 2, neonatal mice treated with 70 mg/kg STZ at days 2 and 5 after birth...
February 1, 2018: Journal of the Endocrine Society
https://www.readbyqxmd.com/read/29449947/reversible-platypnoea-orthodeoxia-syndrome-in-post-tuberculosis-bronchial-stenosis
#13
Geak Poh Tan, John Arputhan Abisheganaden, Soon Keng Goh, Akash Verma
Bronchial stenosis is known to complicate endobronchial tuberculosis despite medical therapy. It is often associated with dyspnoea. In severe cases, bronchial stenosis results in airflow obstruction, impaired secretion clearance, and can lead to respiratory failure. We present an unusual observation of platypnoea-orthodeoxia syndrome in a young woman with acute atelectasis due to post-tuberculosis bronchial stricture. Imaging revealed complete middle and right lower lobe atelectasis with a partially aerated right upper lobe...
April 2018: Respirology Case Reports
https://www.readbyqxmd.com/read/29449707/modulation-of-cardiac-stem-cell-characteristics-by-metoprolol-in-hypertensive-heart-disease
#14
Sherin Saheera, Ajay Godwin Potnuri, Renuka R Nair
Cardiac stem cells (CSCs) play a vital role in cardiac remodeling. Uncontrolled hypertension leads to cardiac hypertrophy, followed by cardiac failure. Pathological remodeling is associated with enhanced oxidative stress. Decreased cardiac stem cell efficiency is speculated in heart diseases. Maintaining a healthy stem cell population is essential for preventing progressive cardiac remodeling. Some anti-hypertensive drugs are cardioprotective. However, the effect of these drugs on CSCs has not been investigated...
February 15, 2018: Hypertension Research: Official Journal of the Japanese Society of Hypertension
https://www.readbyqxmd.com/read/29449677/usp35-regulates-mitotic-progression-by-modulating-the-stability-of-aurora-b
#15
Jinyoung Park, Mi-Sun Kwon, Eunice EunKyeong Kim, Hyunsook Lee, Eun Joo Song
Although approximately 100 deubiquitinating enzymes (DUBs) are encoded in the human genome, very little is known about the DUBs that function in mitosis. Here, we demonstrate that DUB USP35 functions as a mitotic regulator by controlling the protein levels and downstream signaling of Aurora B and the depletion of USP35 eventually leads to several mitotic defects including cytokinesis failures. USP35 binds to and deubiquitinates Aurora B, and inhibits the APC CDH1 -mediated proteasomal degradation of Aurora B, thus maintaining its steady-state levels during mitosis...
February 15, 2018: Nature Communications
https://www.readbyqxmd.com/read/29449554/dynamic-allocation-of-orthogonal-ribosomes-facilitates-uncoupling-of-co-expressed-genes
#16
Alexander P S Darlington, Juhyun Kim, José I Jiménez, Declan G Bates
Introduction of synthetic circuits into microbes creates competition between circuit and host genes for shared cellular resources, such as ribosomes. This can lead to the emergence of unwanted coupling between the expression of different circuit genes, complicating the design process and potentially leading to circuit failure. By expressing a synthetic 16S rRNA with altered specificity, we can partition the ribosome pool into host-specific and circuit-specific activities. We show mathematically and experimentally that the effects of resource competition can be alleviated by targeting genes to different ribosomal pools...
February 15, 2018: Nature Communications
https://www.readbyqxmd.com/read/29449434/msh6-haploinsufficiency-at-relapse-contributes-to-the-development-of-thiopurine-resistance-in-pediatric-b-lymphoblastic-leukemia
#17
Nikki A Evensen, P Pallavi Madhusoodhan, Julia Meyer, Jason Saliba, Ashfiyah Chowdhury, David J Araten, Jacob Nersting, Teena Bhatla, Tiffaney L Vincent, David Teachey, Stephen P Hunger, Jun Yang, Kjeld Schmiegelow, William L Carroll
Survival of children with relapsed acute lymphoblastic leukemia is poor and understanding mechanisms underlying resistance is essential in developing new therapy. Relapse-specific heterozygous deletions in MSH6, a crucial part of DNA Mismatch Repair, are frequently detected. Our aim was to determine whether MSH6 deletion results in a hypermutator phenotype associated with generation of secondary mutations involved in drug resistance or leads to a failure to initiate apoptosis directly in response to chemotherapeutic agents...
February 15, 2018: Haematologica
https://www.readbyqxmd.com/read/29448998/cardiac-amyloidosis-from-clinical-suspicion-to-morphological-diagnosis
#18
REVIEW
Pavla Flodrova, Patrik Flodr, Tomas Pika, Jiri Vymetal, Dusan Holub, Petr Dzubak, Marian Hajduch, Vlastimil Scudla
Amyloidosis is a heterogeneous group of diseases characterised by extracellular accumulation of amyloid in various tissues and organs of the body, leading to alteration and destruction of tissues. Heart involvement is the most important prognostic factor in patients with systemic amyloidosis and the diagnosis and typing of amyloid must be made properly. The clinical picture shows congestive heart failure with predominant right-sided heart failure symptoms in fully developed disease, various types of arrhythmias and characteristic electrocardiography and echocardiography findings...
February 12, 2018: Pathology
https://www.readbyqxmd.com/read/29448512/thymosin-%C3%AE-4-reduces-h%C3%A2-o%C3%A2-induced-oxidative-stress-in-mc3t3-e1-cells-on-titanium-surface
#19
Baik-Dong Choi, Do-Seon Lim, Seung-Yeon Lee, Tae-Hee Nho, Soon-Jeong Jeong, Yeong-Mu Ko, Sung-Nam Gang, Young-Joon Kim, Xing-Hui Piao, Moon-Jin Jeong
Thymosin β4 (Tβ4) is known to inhibit an inflammatory response and to increase the survival of osteoblasts on titanium (Ti) surfaces. Ti is the most widely used graft material in dentistry; however, an inflammatory response induced following implant placement results in the generation of reactive oxygen species (ROS). The oxidative stress from the production of ROS such as nitric oxide (NO) and hydrogen peroxide (H2O2) can damage surrounding cells, resulting in implant failure by decreasing cell viability...
February 1, 2018: Journal of Nanoscience and Nanotechnology
https://www.readbyqxmd.com/read/29448105/casein-kinase-2-phosphorylates-and-stabilizes-c-ebp%C3%AE-in-pancreatic-%C3%AE-cells
#20
Tomoko Takai, Tomokazu Matsuda, Yuki Matsuura, Kaho Inoue, Emi Suzuki, Ayumi Kanno, Maki Kimura-Koyanagi, Shun-Ichiro Asahara, Naoya Hatano, Wataru Ogawa, Yoshiaki Kido
During the development of type 2 diabetes, endoplasmic reticulum (ER) stress leads to pancreatic β cell failure. CCAAT/enhancer-binding protein (C/EBP) β is highly induced by ER stress and AMP-activated protein kinase (AMPK) suppression in pancreatic β cells, and its accumulation reduces pancreatic β cell mass. We investigated the phosphorylation state of C/EBPβ under these conditions. Casein kinase 2 (CK2) was found to co-localize with C/EBPβ in MIN6 cells. It phosphorylated S222 of C/EBPβ, a previously unidentified phosphorylation site...
February 12, 2018: Biochemical and Biophysical Research Communications
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