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https://www.readbyqxmd.com/read/28545174/causes-and-clinical-outcomes-of-revision-total-knee-arthroplasty
#1
Dong-Hyun Lee, Seung-Hun Lee, Eun-Kyoo Song, Jong-Keun Seon, Hong-An Lim, Hong-Yeol Yang
Purpose: The purpose of this study was to evaluate causes and clinical outcomes of revision total knee arthroplasty (TKA) with a minimum 2-year follow-up. Materials and Methods: We performed a retrospective review on the records of 225 revision TKAs performed from 2003 to 2012 at a single institution. Finally, 206 cases were conducted. To evaluate clinical outcomes, we checked the range of motion (ROM), Knee Society (KS) score, Hospital for Special Surgery (HSS) score, and Western Ontario and McMaster Universities Osteoarthritis Index (WOMAC) score preoperatively, 6 months postoperatively and yearly thereafter and complications after revision TKA...
June 1, 2017: Knee Surgery & related Research
https://www.readbyqxmd.com/read/28540896/postrenal-transplant-malignancy-incidence-risk-factors-and-prognosis
#2
Nabil Abdelfadil Elserwy, Esam Elden Lotfy, Mohamad Ashraf Fouda, Medhat Ibrahim Mahmoud, Ahmed Farouk Donia, Mohamed Elsayed Mashaly, Mohamed Hamed Abbas, Mohamed Megahed Abuelmagd, Rasha Kamal Abouelenein, Mabrouk Ibrahim Ismail, Mohamed Adel Bakr
The newer and potent immunosuppressive agents have successfully reduced the risk of rejection after kidney transplantation, but the development of cardiovascular diseases, infections, and malignancy is major factors limiting their success. Posttransplantation malignancy is the second most common cause of death in renal transplant recipients after cardiovascular disease; it is expected that mortality due to malignancy may become the most common cause of death within the next two decades. This study is designed to evaluate the incidence, risk factors, and types of malignancies occurring after renal transplantation and their impact on patient and graft survival...
May 2017: Saudi Journal of Kidney Diseases and Transplantation
https://www.readbyqxmd.com/read/28539365/functional-analysis-of-human-cytochrome-p450-21a2-variants-involved-in-congenital-adrenal-hyperplasia
#3
Chunxue Wang, Pradeep S Pallan, Wei Zhang, Li Lei, Francis K Yoshimoto, Michael R Waterman, Martin Egli, F Peter Guengerich
Cytochrome P450 (P450, CYP) 21A2 is the major steroid 21-hydroxylase, converting progesterone to 11-deoxycorticosterone and 17α-hydroxy(OH)progesterone to 11-deoxycortisol. More than 100 CYP21A2 variants give rise to congenital adrenal hyperplasia (CAH). We previously reported a structure of wild-type (WT) human P450 21A2 with bound progesterone and now present a structure bound to the other substrate (17α-OH progesterone). We found that the 17α-OH progesterone- and progesterone-bound complex structures are highly similar, with only some minor differences in surface loop regions...
May 24, 2017: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/28535934/validated-high-performance-anion-exchange-chromatography-with-pulsed-amperometric-detection-method-for-the-determination-of-residual-keratan-sulfate-and-other-glucosamine-impurities-in-sodium-chondroitin-sulfate
#4
Susanna Bottelli, Gianluca Grillo, Edoardo Barindelli, Alessandro Nencioni, Alessandro Di Maria, Tiziano Fossati
An efficient and sensitive analytical method based on high-performance anion exchange chromatography with pulsed amperometric detection (HPAEC-PAD) was devised for the determination of glucosamine (GlcN) in sodium chondroitin sulfate (CS). Glucosamine (GlcN) is intended as marker of residual keratan sulfate (KS) and other impurities generating glucosamine by acidic hydrolyzation. The latter brings CS and KS to their respective monomers. Since GlcN is present only in KS we developed a method that separates GlcN from GalN, the principal hydrolytic product of CS, and then we validated it in order to quantify GlcN...
May 10, 2017: Journal of Chromatography. A
https://www.readbyqxmd.com/read/28534512/a-viral-microrna-downregulates-metastasis-suppressor-cd82-and-induces-cell-invasion-and-angiogenesis-by-activating-the-c-met-signaling
#5
W Li, M Hu, C Wang, H Lu, F Chen, J Xu, Y Shang, F Wang, J Qin, Q Yan, B J Krueger, R Renne, S-J Gao, C Lu
Kaposi's sarcoma (KS) as the most common AIDS-associated malignancy is etiologically caused by KS-associated herpesvirus (KSHV). KS is a highly disseminated and vascularized tumor. KSHV encodes 12 pre-microRNAs that yield 25 mature microRNAs (miRNAs), but their roles in KSHV-induced tumor metastasis and angiogenesis remain largely unclear. KSHV-encoded miR-K12-6 (miR-K6) can generate two mature miRNAs, miR-K6-5p and miR-K6-3p. Recently, we have shown that miR-K6-3p induced cell migration and angiogenesis via directly targeting SH3 domain binding glutamate-rich protein (SH3BGR)...
May 22, 2017: Oncogene
https://www.readbyqxmd.com/read/28531260/comparison-of-kaposi-sarcoma-risk-in-hiv-positive-adults-across-five-continents-a-multiregional-multicohort-study
#6
Julia Bohlius
Background: We compared Kaposi sarcoma (KS) risk in adults who initiated antiretroviral therapy (ART) across the Asia-Pacific, South Africa, Europe, Latin, and North America. Methods: We included cohort data of HIV-positive adults who initiated ART after 1995 within the framework of two large collaborations of observational HIV cohorts. We present incidence rates and adjusted hazard ratios (aHRs). Results: We included 208,140 patients from 57 countries...
May 20, 2017: Clinical Infectious Diseases: An Official Publication of the Infectious Diseases Society of America
https://www.readbyqxmd.com/read/28530850/fresh-osteochondral-allograft-transplantation-is-graft-storage-time-associated-with-clinical-outcomes-and-graft-survivorship
#7
Kenneth J Schmidt, Luís E Tírico, Julie C McCauley, William D Bugbee
BACKGROUND: Regulatory concerns and the popularity of fresh osteochondral allograft (OCA) transplantation have led to a need for prolonged viable storage of osteochondral grafts. Tissue culture media allow a longer storage time but lead to chondrocyte death within the tissue. The long-term clinical consequence of prolonged storage is unknown. HYPOTHESIS: Patients transplanted with OCAs with a shorter storage time would have lower failure rates and better clinical outcomes than those transplanted with OCAs with prolonged storage...
May 1, 2017: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/28530484/in%C3%A2-vivo-geometry-of-the-kissing-stent-and-covered-endovascular-reconstruction-of-the-aortic-bifurcation-configurations-in-aortoiliac-occlusive-disease
#8
Erik Groot Jebbink, Thijs G Ter Mors, Cornelis H Slump, Robert H Geelkerken, Suzanne Holewijn, Michel Mpj Reijnen
Objectives Various configurations of kissing stent (KS) configurations exist and patency rates vary. In response the covered endovascular reconstruction of the aortic bifurcation configuration was designed to minimize mismatch and improve outcome. The aim of the current study is to compare geometrical mismatch of kissing stent with the covered endovascular reconstruction of the aortic bifurcation configuration in vivo. Methods Post-operative computed tomographic data and patient demographics from 11 covered endovascular reconstruction of the aortic bifurcation and 11 matched kissing stent patients were included...
January 1, 2017: Vascular
https://www.readbyqxmd.com/read/28526236/management-of-severe-valgus-knee-by-total-unconstrained-arthroplasty-a-comparative-study-with-long-term-follow-up
#9
X Paredes-Carnero, A B Fernández-Cortiñas, J Escobar, J M Galdo, J G Babé
OBJECTIVE: To evaluate the use of unconstrained implants in the correction of large valgus deformities using total knee arthroplasty (TKA). MATERIAL AND METHOD: A total of 817 primary TKA operated between 1998 and 2006 were retrospectively assessed. 50 TKA were selected (group A) in 49 patients, with a minimum deformity of 15° of valgus, 41 cases were included. Another 50 ATR were selected (group B), with a maximum deformity of 15° of varus, finally including 44 cases in 42 patients...
May 16, 2017: Revista Española de Cirugía Ortopédica y Traumatología
https://www.readbyqxmd.com/read/28511945/low-rates-of-aseptic-tibial-loosening-in-obese-patients-with-use-of-high-viscosity-cement-and-standard-tibial-tray-2-year-minimum-follow-up
#10
David A Crawford, Keith R Berend, Denis Nam, Robert L Barrack, Joanne B Adams, Adolph V Lombardi
BACKGROUND: Total knee arthroplasty is overall a very successful surgery, but complications do occur. These complications include aseptic loosening of the tibial component, and obese patients are among the highest risk group. High-viscosity cement (HVC) has been implicated as a possible cause for aseptic loosening of the tibial component. The purpose of this study was to evaluate the incidence of aseptic loosening of the tibial component in obese patients with the use of HVC and standard tibial tray...
April 22, 2017: Journal of Arthroplasty
https://www.readbyqxmd.com/read/28511464/a-study-to-assess-the-functional-outcome-of-decompression-and-posterior-lumbar-interbody-fusion-of-low-grade-spondylolisthesis-of-lumbar-vertebra
#11
Deepak Hegde, Sameer Mehra, Santhosh Babu, Arjun Ballal
INTRODUCTION: Spondylolisthesis is defined as the forward displacement of one vertebra over the vertebra below. It is often accompanied by spinal canal stenosis and compression, which is the cause of all the symptoms. AIM: To assess and study the functional outcome after decompression and Posterior Lumbar Interbody Fusion (PLIF) of isthmic spondylolisthesis of lower lumbar vertebra and to study the complications occurring with this technique. MATERIALS AND METHODS: A prospective study was conducted in the Department of Orthopaedics in Justice KS Hegde Charitable Hospital, Mangalore, Karnataka, India from March 2015 to August 2016...
March 2017: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/28510725/ifitm3-tlr3-and-cd55-genes-snps-and-cumulative-ge-netic-risks-for-severe-outcomes-in-chinese-patients-with-h7n9-h1n1pdm09-influenza
#12
Nelson Lee, Bin Cao, Changwen Ke, Hongzhou Lu, Yunwen Hu, Ht Claudia Tam, Cw Ronald Ma, Dawei Guan, Zhaoqin Zhu, Hui Li, Lin Mulei, Rity Yk Wong, Irene Mh Yung, Tin-Nok Hung, Kirsty Kwok, Peter Horby, Sc David Hui, Cw Martin Chan, Ks Paul Chan
Background: We examined associations between SNPs (single-nucleotide-polymorphisms) of IFITM3, TLR3, and CD55 genes and influenza clinical outcomes in Chinese patients. Methods: A multicenter-study was conducted on 275 adult cases of prospectively-diagnosed H7N9 and H1N1pdm09 infections. Host DNA was extracted from diagnostic respiratory samples; IFITM3 rs12252, TLR3 rs5743313, CD55 rs2564978, and TLR4 rs4986790/4986791 were targeted for genotyping by Sanger-sequencing...
May 16, 2017: Journal of Infectious Diseases
https://www.readbyqxmd.com/read/28506734/mtor-vegf-pdgfr-and-c-kit-signaling-pathway-activation-in-kaposi-sarcoma
#13
Darcy A Kerr, Satya Vara Prasad Busarla, Devon C Gimbel, Aliyah R Sohani, Rosalynn M Nazarian
Kaposi sarcoma (KS) is a locally progressive, intermediate-grade vascular neoplasm with no known cure, high recurrence rates and potential for wide dissemination. Low efficacy and high toxicity limit current therapeutic options for advanced disease. Activation of mammalian target of rapamycin (mTOR), platelet-derived growth factor (PDGF), vascular endothelial growth factor (VEGF), and c-kit signaling pathways has been implicated in KS pathogenesis and may suggest a role for targeted inhibitors. KS cases were retrospectively retrieved (n=274), most (90%) associated with human immunodeficiency virus (HIV)...
May 12, 2017: Human Pathology
https://www.readbyqxmd.com/read/28503183/embolized-stems-recover-overnight-in-zea-mays-the-role-of-soil-water-root-pressure-and-nighttime-transpiration
#14
Sean M Gleason, Dustin R Wiggans, Clayton A Bliss, Jason S Young, Mitchell Cooper, Katie R Willi, Louise H Comas
It is not currently well-understood how much xylem conductance is lost in maize plants during the day, if conductance is recovered during the night, or what soil water conditions are required for recovery to take place. To answer these questions we designed a greenhouse experiment whereby two genetically dissimilar maize genotypes were subjected to a level of water stress commonly experienced in the field (Ψxylem ∼-2 MPa). We then measured the loss of stem-specific conductivity associated with this level of stress, as well as the overnight recovery following three re-watering treatments: Ψsoil ∼ 0 MPa, Ψsoil ∼-0...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28501563/kindlin-1-protects-cells-from-oxidative-damage-through-activation-of-erk-signalling
#15
Hila Emmert, Hitesh Patel, Valerie G Brunton
Kindlin-1 is a FERM domain containing adaptor protein that is found predominantly at cell-extracellular matrix adhesions where it binds to β-integrin subunits and is required for integrin activation. Loss of function mutations in the FERMT1 gene which encodes Kindlin-1 leads to the development of Kindler Syndrome (KS) an autosomal recessive skin disorder characterized by skin blistering, photosensitivity, and predisposition to aggressive squamous cell carcinoma (SCC). Here we show that loss of Kindlin-1 sensitizes both SCC cells and keratinocytes to oxidative stress: Kindlin-1 deficient cells have higher levels of reactive oxygen species, decreased viability and increased DNA damage after treatment with either hydrogen peroxide (H2O2) or irradiation with UVA...
May 10, 2017: Free Radical Biology & Medicine
https://www.readbyqxmd.com/read/28500680/rapid-detoxification-via-glutathione-s-transferase-gst-conjugation-confers-high-level-of-atrazine-resistance-in-palmer-amaranth-amaranthus-palmeri
#16
Sridevi Nakka, Amar S Godar, Curtis R Thompson, Dallas E Peterson, Mithila Jugulam
BACKGROUND: Palmer amaranth (Amaranthus palmeri) is an economically troublesome, aggressive and damaging weed that has evolved resistance to six herbicide modes of action (MOA) including photosystem II (PS II)-inhibitors, such as atrazine. The objective of this study was to investigate the mechanism and inheritance of atrazine resistance in Palmer amaranth. RESULTS: A population of Palmer amaranth from Kansas (KSR) had a high level (160-198 fold more; SE ± 21-26) of resistance to atrazine compared to the two known susceptible populations MSS and KSS, from Mississippi and KS, respectively...
May 13, 2017: Pest Management Science
https://www.readbyqxmd.com/read/28499501/potential-involvement-of-chondroitin-sulfate-a-in-the-pathogenesis-of-ameloblastoma
#17
Xiangjun Li, Hiroshi Kurita, Tiepeng Xiao, Kyou Iijima, Kenji Kurashina, Jun Nakayama
Ameloblastoma is classified as a benign odontogenic tumor characterized by locally invasive behavior and high risk of recurrence. Here, we evaluate a potential role for glycosaminoglycan, a structural component of cell membranes and extracellular matrix, in ameloblstoma pathogenesis. We subjected formalin-fixed, paraffin-embedded tissue sections of 34 cases of ameloblastoma, 10 of odontogenic keratocyst, and 17 of dentigerous cyst to immunohistochemistry using monoclonal antibodies recognizing chondroitin sulfate A (CS-A), heparan sulfate (HS), and keratan sulfate (KS)...
May 9, 2017: Acta Histochemica
https://www.readbyqxmd.com/read/28499167/electrochemical-behavior-of-hemin-binding-with-human-centrin-3
#18
Yaqin Zhao, Xuefeng Chu, Binsheng Yang
The electrochemical responses of human centrin 3 (HsCen3) binding with hemin were studied by cyclic voltammetry (CV) and differential pulse voltammetry (DPV) using glassy carbon electrodes (GCEs). In CV, the formal potential (E(0')) of hemin with the addition of HsCen3 shifted from -0.51 to -0.36V (versus saturated calomel electrode, SCE), indicating that a new species of hemin-HsCen3 had formed. Upon binding with HsCen3, the redox current of hemin in CV and DPV decreased significantly. Based on their titration curves, the association constant of HsCen3 with hemin was obtained with a logK of approximately 4, which was consistent with that obtained from spectroscopy...
April 29, 2017: Bioelectrochemistry
https://www.readbyqxmd.com/read/28498556/adaptive-and-maladaptive-functioning-in-kleefstra-syndrome-compared-to-other-rare-genetic-disorders-with-intellectual-disabilities
#19
Karlijn Vermeulen, Anneke de Boer, Joost G E Janzing, David A Koolen, Charlotte W Ockeloen, Marjolein H Willemsen, Floor M Verhoef, Patricia A M van Deurzen, Linde van Dongen, Hans van Bokhoven, Jos I M Egger, Wouter G Staal, Tjitske Kleefstra
Detailed neurobehavioural profiles are of major value for specific clinical management, but have remained underexposed in the population with intellectual disabilities (ID). This was traditionally classified based on IQ level only. Rapid advances in genetics enable etiology based stratification in the majority of patients, which reduces clinical heterogeneity. This paper illustrates that specific profiles can be obtained for rare syndromes with ID. Our main aim was to study (mal)adaptive functioning in Kleefstra Syndrome (KS) by comparing and contrasting our findings to three other subgroups: Koolen-de Vries Syndrome, GATAD2B-related syndrome, and a mixed control group of individuals with ID...
May 12, 2017: American Journal of Medical Genetics. Part A
https://www.readbyqxmd.com/read/28497001/klinefelter-syndrome-in-association-with-tetralogy-of-fallot-and-congenital-diaphragmatic-hernia
#20
Sethuraman Swaminathan, Sudheer R Gorla, Deborah S Barbouth
Klinefelter syndrome (KS) is the most common sex chromosomal aneuploidy in males. Major cardiovascular and diaphragmatic anomalies are uncommon in this syndrome. Here we report an infant with KS who had tetralogy of Fallot and congenital diaphragmatic hernia, all of which were identified prenatally and managed successfully after birth. Microarray analysis did not reveal any deletions or duplications other than the additional X-chromosome, to account for the additional abnormalities in this infant. To the authors' knowledge, this is the first such report of major cardiac and diaphragm anomaly occurring together, in an infant with KS...
June 2017: Journal of Pediatric Genetics
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