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https://www.readbyqxmd.com/read/28297659/oncogene-selective-sensitivity-to-synchronous-cell-death-following-modulation-of-the-amino-acid-nutrient-cystine
#1
Ioannis Poursaitidis, Xiaomeng Wang, Thomas Crighton, Christiaan Labuschagne, David Mason, Shira L Cramer, Kendra Triplett, Rajat Roy, Olivier E Pardo, Michael J Seckl, Scott W Rowlinson, Everett Stone, Richard F Lamb
Cancer cells reprogram their metabolism, altering both uptake and utilization of extracellular nutrients. We individually depleted amino acid nutrients from isogenic cells expressing commonly activated oncogenes to identify correspondences between nutrient supply and viability. In HME (human mammary epithelial) cells, deprivation of cystine led to increased cell death in cells expressing an activated epidermal growth factor receptor (EGFR) mutant. Cell death occurred via synchronous ferroptosis, with generation of reactive oxygen species (ROS)...
March 14, 2017: Cell Reports
https://www.readbyqxmd.com/read/28270542/effects-of-heat-and-moisture-exchangers-and-exhaled-humidity-on-aerosol-deposition-in-a-simulated-ventilator-dependent-adult-lung-model
#2
Arzu Ari, Khalid S Alwadeai, James B Fink
BACKGROUND: Many in vitro models report higher inhaled dose with dry versus heated humidity. Heat-and-moisture exchangers (HMEs) provide passive humidity in ventilator-dependent patients but act as a barrier to aerosol. The HMEs designed to allow aerosol delivery (HME-ADs) have not been well described. The purpose of this study is to determine the impact on aerosol deposition of HME-ADs with and without active exhaled humidity in a simulated ventilator-dependent adult model. METHODS: We used an in vitro lung model consisting of an intubated teaching mannequin with an endotracheal tube of 8...
March 7, 2017: Respiratory Care
https://www.readbyqxmd.com/read/28249791/an-evaluation-of-forearm-deformities-in-hereditary-multiple-exostoses-factors-associated-with-radial-head-dislocation-and-comprehensive-classification
#3
Ah Reum Jo, Sung Taek Jung, Myung Sun Kim, Chang Seon Oh, Byung Ju Min
PURPOSE: This study attempted to evaluate a series of patients with hereditary multiple exostoses (HME) who could not be categorized according to the widely accepted Masada classification and to identify radiographic variables such as radial bowing, ulnar shortening, ulnar variance, radial articular angle, and carpal slip predictive of deformity. METHODS: We retrospectively reviewed data on 102 upper limbs of 53 pediatric patients with HME. Demographics, site of forearm involvement, and radiographic parameters were documented...
February 27, 2017: Journal of Hand Surgery
https://www.readbyqxmd.com/read/28183050/deep-peroneal-nerve-palsy-due-to-osteochondroma-arising-from-fibular-head-and-proximal-lateral-tibia
#4
Murat Demiroğlu, Korhan Özkan, Bulent Kılıç, Akif Akçal, Mesut Akkaya, Feyza Ünlü Özkan
Following median and ulnar nerves, peroneal nerve entrapment is the most frequent nerve involvement in the body Katirji and Wilbourn (1998) [1]. Osteochondromas are the most common benign bone tumors comprising 9% of all bone tumors and 35% of benign bone tumors Porter (2000) [2]. Hereditary exostoses (HME) is an autosomal dominant disorder with variable penetrance characterized by multiple osteochondromas near joints. It is one of the most commonskeletal dysplasias with a frequency of about 1.18%. In this study, we aimed to present a case with a drop foot resulting from osteochondromas of proximal tibia and fibula and help to guide the clinicians in differential diagnosis according to SCARE criteria Agha (2016) [3]...
January 24, 2017: International Journal of Surgery Case Reports
https://www.readbyqxmd.com/read/28152221/ex-vivo-humidifying-capacity-and-patient-acceptability-of-stoma-cloths-in-laryngectomized-individuals
#5
Liset Lansaat, Cindy van den Boer, Sara H Muller, Vincent van der Noort, Michiel W M van den Brekel, Frans J M Hilgers
BACKGROUND: Heat and moisture exchangers (HMEs) improve respiratory function after laryngectomy, but there is virtually no information on the benefit of traditional stoma cloths or other covers. METHODS: Two sequential studies were performed: (1) an ex vivo test was used to compare the humidifying capacity of stoma cloths to other coverings; and (2) a 4-week randomized trial was then performed to assess patient acceptability of cloths both alone and with an HME (N = 18)...
February 2, 2017: Head & Neck
https://www.readbyqxmd.com/read/28129353/the-humidity-in-a-low-flow-dr%C3%A3-ger-fabius-anesthesia-workstation-with-or-without-thermal-insulation-or-a-heat-and-moisture-exchanger-a-prospective-randomized-clinical-trial
#6
Sergius A R de Oliveira, Lorena M C Lucio, Norma S P Modolo, Yoko Hayashi, Mariana G Braz, Lídia R de Carvalho, Leandro G Braz, José Reinaldo C Braz
BACKGROUND: During anesthesia, as compared with intensive care, the time of the tracheal intubation is much shorter. An inhaled gas minimum humidity of 20 mgH2O.L-1 is recommended to reduce the deleterious effects of dry gas on the airways during anesthesia with tracheal intubation. The Fabius GS Premium® anesthesia workstation (Dräger Medical, Lübeck, Germany) has a built-in hotplate to heat gases in the breathing circuit. A heat and moisture exchanger (HME) is used to further heat and humidify the inhaled gas...
2017: PloS One
https://www.readbyqxmd.com/read/28122459/increased-dissolution-rates-of-tranilast-solid-dispersions-extruded-with-inorganic-excipients
#7
M Maniruzzaman, S A Ross, M T Islam, N Scoutaris, A Nair, Dennis Douroumis
The purpose of this study was to evaluate the performance of Neusilin® (NEU) a synthetic magnesium aluminometasilicate as inorganic drug carrier co-processed with the hydrophilic surfactants Labrasol and Labrafil to develop Tranilast (TLT) based solid dispersions using continuous melt extrusion (HME) processing. Twin - screw extrusion was optimized to develop various TLT/excipient/surfactant formulations followed by continuous capsule filling in the absence of any downstream equipment. Physicochemical characterisation showed the existence of TLT in partially crystalline state in the porous network of inorganic NEU for all extruded formulations...
January 26, 2017: Drug Development and Industrial Pharmacy
https://www.readbyqxmd.com/read/28108974/design-and-evaluation-of-topical-diclofenac-sodium-gel-using-hot-melt-extrusion-technology-as-a-continuous-manufacturing-process-with-kolliphor%C3%A2-p407
#8
Jaywant Pawar, Rajkiran Narkhede, Purnima Amin, Vaishali Tawde
The aim of the present context was to develop and evaluate a Kolliphor® P407-based transdermal gel formulation of diclofenac sodium by hot melt extrusion (HME) technology; central composite design was used to optimize the formulation process. In this study, we have explored first time ever HME as an industrially feasible and continuous manufacturing technology for the manufacturing of gel formulation using Kolliphor® P407 and Kollisolv® PEG400 as a gel base. Diclofenac sodium was used as a model drug. The HME parameters such as feeding rate, screw speed, and barrel temperature were crucial for the semisolid product development, and were optimized after preliminary trials...
January 20, 2017: AAPS PharmSciTech
https://www.readbyqxmd.com/read/28072741/daughter-and-mother-diagnosed-with-hereditary-multiple-exostoses-a-case-report-and-a-review-of-the-literature
#9
Cristina Oana Mărginean, Lorena Elena Meliţ, Maria Oana Mărginean
INTRODUCTION: Hereditary multiple exostoses (HME) or osteochondromatosis is a rare autosomal dominant disease characterized by multiple osteochondromas and skeletal deformities. PATIENT CONCERNS & DIAGNOSES: We present the case of a 5 years and 9 month-old patient who presented with inferior limb pain for approximately 6 months, associating also deformity of the right index finger for a month. Hand X-ray revealed a radiologic abnormality of the right radius, therefore the child was referred to our clinic for further investigations...
January 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28053536/identification-of-a-new-mutation-in-an-iranian-family-with-hereditary-multiple-osteochondromas
#10
Susan Akbaroghli, Maryam Balali, Behnam Kamalidehghan, Siamak Saber, Omid Aryani, Goh Yong Meng, Massoud Houshmand
BACKGROUND: Hereditary multiple osteochondromas (HMO), previously named hereditary multiple exostoses (HME), is an autosomal dominant skeletal disorder characterized by the growth of multiple osteochondromas and is associated with bony deformity, skeletal growth reduction, nerve compression, restriction of joint motion, and premature osteoarthrosis. HMO is genetically heterogeneous, localized on at least three chromosomal loci including 8q24.1 (EXT1), 11p11-p13 (EXT2), and 19p (EXT3)...
2017: Therapeutics and Clinical Risk Management
https://www.readbyqxmd.com/read/28040458/a-novel-approach-for-the-development-of-a-nanostructured-lipid-carrier-formulation-by-hot-melt-extrusion-technology
#11
Ajinkya M Bhagurkar, Michael A Repka, S Narasimha Murthy
The main aim of this study was to investigate the feasibility of preparing nanostructured lipid carrier (NLC) utilizing hot-melt extrusion (HME) coupled with probe sonication. The process parameters for HME and sonication were optimized and a modified screw configuration was used for extrusion. Lidocaine-loaded NLCs were successfully prepared by the proposed method with particle size <50 nm and polydispersity index <0.3. Transmission electron microscopy revealed the spherical nature of the particles. The second objective was to develop NLCs for topical controlled delivery of drug for pain management in cutaneous wounds...
December 28, 2016: Journal of Pharmaceutical Sciences
https://www.readbyqxmd.com/read/28017768/coupling-3d-printing-with-hot-melt-extrusion-to-produce-controlled-release-tablets
#12
Jiaxiang Zhang, Xin Feng, Hemlata Patil, Roshan V Tiwari, Michael A Repka
The main objective of this work was to explore the potential of coupling fused deposition modeling in three-dimensional (3D) printing with hot-melt extrusion (HME) technology to facilitate additive manufacturing, in order to fabricate tablets with enhanced extended release properties. Acetaminophen was used as the model drug and different grades and ratios of polymers were used to formulate tablets. Three-point bending and hardness tests were performed to determine the mechanical properties of the filaments and tablets...
March 15, 2017: International Journal of Pharmaceutics
https://www.readbyqxmd.com/read/27992309/advanced-implantable-drug-delivery-systems-via-continuous-manufacturing
#13
REVIEW
Mohammed Maniruzzaman, Ali Nokhodchi
Polymeric implantable drug delivery systems have remarkable potential for systemic delivery of various therapeutic agents. Generally, drug-loaded implants do not require a vehicle for delivery and can be used to attain prolonged delivery into the systemic circulation of active pharmaceutical ingredients (APIs) with enhanced drug bioavailability. Furthermore, implants can provide drug release ranging from months to years, which improves patient compliance, especially for poorly bioavailable and rapidly metabolized compounds...
2016: Critical Reviews in Therapeutic Drug Carrier Systems
https://www.readbyqxmd.com/read/27988376/in-line-monitoring-of-compaction-properties-on-a-rotary-tablet-press-during-tablet-manufacturing-of-hot-melt-extruded-amorphous-solid-dispersions
#14
W Grymonpré, G Verstraete, P J Van Bockstal, J Van Renterghem, P Rombouts, T De Beer, J P Remon, C Vervaet
As the number of applications for polymers in pharmaceutical development is increasing, there is need for fundamental understanding on how such compounds behave during tableting. This research is focussed on the tableting behaviour of amorphous polymers, their solid dispersions and the impact of hot-melt extrusion on the compaction properties of these materials. Soluplus, Kollidon VA 64 and Eudragit EPO were selected as amorphous polymers since these are widely studied carriers for solid dispersions, while Celecoxib was chosen as BCS class II model drug...
December 14, 2016: International Journal of Pharmaceutics
https://www.readbyqxmd.com/read/27943014/fabricating-a-shell-core-delayed-release-tablet-using-dual-fdm-3d-printing-for-patient-centred-therapy
#15
Tochukwu C Okwuosa, Beatriz C Pereira, Basel Arafat, Milena Cieszynska, Abdullah Isreb, Mohamed A Alhnan
PURPOSE: Individualizing gastric-resistant tablets is associated with major challenges for clinical staff in hospitals and healthcare centres. This work aims to fabricate gastric-resistant 3D printed tablets using dual FDM 3D printing. METHODS: The gastric-resistant tablets were engineered by employing a range of shell-core designs using polyvinylpyrrolidone (PVP) and methacrylic acid co-polymer for core and shell structures respectively. Filaments for both core and shell were compounded using a twin-screw hot-melt extruder (HME)...
December 9, 2016: Pharmaceutical Research
https://www.readbyqxmd.com/read/27933382/the-impact-of-hereditary-multiple-exostoses-on-quality-of-life-satisfaction-global-health-status-and-pain
#16
Riccardo D'Ambrosi, Vincenza Ragone, Camilla Caldarini, Nicola Serra, Federico Giuseppe Usuelli, Renato Mario Facchini
PURPOSE: The aim of the study was to evaluate quality of life (QOL), global health status, pain, and level of satisfaction in patients with hereditary multiple exostoses (HME), and to correlate the association between the severity of diseases and age, sex, number of surgical procedures, and number of exostoses. METHODS: The data of 50 patients with HME were retrospectively evaluated and recorded. QOL was evaluated with the Short-Form Health Survey (SF-12) questionnaire, the 12-Item General Health Questionnaire (GHQ-12), and Quality of Life Enjoyment and Satisfaction Questionnaire (Q-LES-Q-SF); intensity of pain was measured using the visual analogue scale (VAS)...
February 2017: Archives of Orthopaedic and Trauma Surgery
https://www.readbyqxmd.com/read/27920806/hereditary-multiple-exostoses-a-review-of-clinical-appearance-and-metabolic-pattern
#17
REVIEW
Giovanni Beltrami, Gabriele Ristori, Guido Scoccianti, Angela Tamburini, Rodolfo Capanna
Hereditary multiple exostoses (HME) is an inherited genetic condition characterized by the presence of multiple exostoses (osteochondromas). MHE is a relatively rare autosomal dominant disorder, mainly caused by loss of function mutations in two genes: exostosin-1 (EXT1) and exostosin-2 (EXT2). These genes are linked to heparan sulfate (HS) synthesis, but the specific molecular mechanism leading to the disruption of the cartilage structure and the consequent exostoses formation is still not resolved. The aim of this paper is to encounter the main aspects of HME reviewing the literature, in order to improve clinical features and evolution, and the metabolic-pathogenetic mechanisms underlying...
May 2016: Clinical Cases in Mineral and Bone Metabolism
https://www.readbyqxmd.com/read/27866007/continuous-manufacturing-via-hot-melt-extrusion-and-scale-up-regulatory-matters
#18
REVIEW
Mohammed Maniruzzaman, Ali Nokhodchi
Currently, because globalization, the pharmaceutical industry is facing enormous challenges to comply with regulatory matters. Reduced patent life and overall decreased profitability of newly discovered drugs are also forcing the pharmaceutical industry to shorten the drug development time with maximum throughput. Therefore, continuous manufacturing (CM) processes via hot melt extrusion (HME) can be a promising alternative for achieving these goals. HME offers solvent-free green technology with a process that is easy to scale up...
November 16, 2016: Drug Discovery Today
https://www.readbyqxmd.com/read/27848149/midlife-managerial-experience-is-linked-to-late-life-hippocampal-morphology-and-function
#19
C Suo, N Gates, M Fiatarone Singh, N Saigal, G C Wilson, J Meiklejohn, P Sachdev, H Brodaty, W Wen, N Singh, B T Baune, M Baker, N Foroughi, Y Wang, Michael J Valenzuela
An active cognitive lifestyle has been suggested to have a protective role in the long-term maintenance of cognition. Amongst healthy older adults, more managerial or supervisory experiences in midlife are linked to a slower hippocampal atrophy rate in late life. Yet whether similar links exist in individuals with Mild Cognitive Impairment (MCI) is not known, nor whether these differences have any functional implications. 68 volunteers from the Sydney SMART Trial, diagnosed with non-amnestic MCI, were divided into high and low managerial experience (HME/LME) during their working life...
November 15, 2016: Brain Imaging and Behavior
https://www.readbyqxmd.com/read/27843770/cost-effectiveness-analysis-of-heat-and-moisture-exchangers-in-mechanically-ventilated-critically-ill-patients
#20
Mayra Goncalves Menegueti, Maria Auxiliadora-Martins, Altacilio Aparecido Nunes
BACKGROUND: Moisturizing, heating and filtering gases inspired via the mechanical ventilation (MV) circuits help to reduce the adverse effects of MV. However, there is still no consensus regarding whether these measures improve patient prognosis, shorten MV duration, decrease airway secretion and lower the incidence of ventilator associated pneumonia (VAP) and other complications. OBJECTIVES: The aim of this study was to study the incremental cost-effectiveness ratio associated with the use of heat and moisture exchangers (HME) filter to prevent VAP compared with the heated humidifiers (HH) presently adopted by intensive care unit (ICU) services within the Brazilian Healthcare Unified System...
August 2016: Anesthesiology and Pain Medicine
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