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https://www.readbyqxmd.com/read/28945054/intracranial-stereotactic-radiosurgery
#1
Andrew A Fanous, Dheerendra Prasad, David Mathieu, Andrew J Fabiano
Stereotactic radiosurgery (SRS) is the use of a single high dose of radiation, stereotactically directed to an intracranial region of interest, in order to create a lesion or obliterate a preexisting one. This technology has evolved over the years into the use of multiple radiation sources oriented at a variety of angles, thus permitting the creation of various treatment target shapes. This allows for non-open surgical treatment of intracranial pathologies, which significantly decreases the risk of morbidity...
September 22, 2017: Journal of Neurosurgical Sciences
https://www.readbyqxmd.com/read/28945050/decreased-nitric-oxide-serum-level-after-pituitary-adenoma-resection
#2
Daniel Babula, Anna Horecka, Dorota Luchowska-Kocot, Joanna Kocot, Jacek Kurzepa
BACKGROUND: Nitric oxide (NO) is synthesized by the conversion of Arginine (Arg) into the NO and Citrulline (Cit). Although the NO is involved into the pathogenesis of several physiological and pathological processes, the role of NO in pituitary adenomas (PA) progres-sion is not determined. Our purpose was to evaluate the relationship between NO and PA as well as the effect of tumor resection on NO metabolites level in serum. METHODS: The study group consisted of 21 patients with PA, 18 patients with macroade-nomas and 3 with microadenomas...
September 22, 2017: Journal of Neurosurgical Sciences
https://www.readbyqxmd.com/read/28945039/-effects-of-xuesaitong-injection-on-inflammation-induced-by-ogd-reoxygenation-in-bv2-microglia
#3
Qian Hong, Shi Wang, Chang-Xiu Chen, Yu Zhang, Yang Wang, Yuan Pan, Zeng-Chun Ma
The present study aims to investigate the effects of Xuesaitong (XST)injection on inflammation induced by OGD/reoxygenation in BV2 microglia cell and explore the underlying mechanisms.The effects of XST injection were evaluated in terms of cell viability, secretion of TNF-α, IL-1β, IL-6 and IL-10 into culture media, protein expression of p-ERK1/2, p-JNK and p-p38, and nuclear translocation of NF-κB p65. The results showed that XST injection significantly increased cell viability, suppressed release of TNF-α, IL-1β, IL-6 and IL-10 and down-regulated p-JNK1/2 and p-p38 MAPK expression in BV2 microglia cells induced by OGD/R injury, whereas it had no effect on p-ERK1/2 expression...
January 2017: Zhongguo Zhong Yao za Zhi, Zhongguo Zhongyao Zazhi, China Journal of Chinese Materia Medica
https://www.readbyqxmd.com/read/28945015/membrane-fusion-mediated-intracellular-delivery-of-lipid-bilayer-coated-mesoporous-silica-nanoparticles
#4
Jian Yang, Jing Tu, Gerda E M Lamers, René C L Olsthoorn, Alexander Kros
Protein delivery into the cytosol of cells is a challenging topic in the field of nanomedicine, because cellular uptake and endosomal escape are typically inefficient, hampering clinical applications. In this contribution cuboidal mesoporous silica nanoparticles (MSNs) containing disk-shaped cavities with a large pore diameter (10 nm) are studied as a protein delivery vehicle using cytochrome-c (cytC) as a model membrane-impermeable protein. To ensure colloidal stability, the MSNs are coated with a fusogenic lipid bilayer (LB) and cellular uptake is induced by a complementary pair of coiled-coil (CC) lipopeptides...
September 25, 2017: Advanced Healthcare Materials
https://www.readbyqxmd.com/read/28945014/a-reloadable-self-healing-hydrogel-enabling-diffusive-transport-of-c-dots-across-gel-gel-interface-for-scavenging-reactive-oxygen-species
#5
Jing Chen, Shuya Li, Ye Zhang, Wei Wang, Xiang Zhang, Yangyang Zhao, Yucai Wang, Hong Bi
While reloadable drug delivery platforms are highly prized for the treatment of a broad spectrum of diseases, the gel-gel interface between hydrogels hinders the intergel diffusive transport of drugs and thus limits the application of hydrogels as reloadable depots. Here, this study reports the circumvention of this barrier by employing a self-healing hydrogel prepared from N-carboxyethyl chitosan and sodium alginate dialdehyde, which are cross-linked via a reversible Schiff base linkage. The injectable and bioadhesive hydrogel shows a rapid gelation time of 47 s...
September 25, 2017: Advanced Healthcare Materials
https://www.readbyqxmd.com/read/28945009/biomechanical-regulation-of-mesenchymal-stem-cells-for-cardiovascular-tissue-engineering
#6
REVIEW
Kayla Henderson, Andrew D Sligar, Victoria P Le, Jason Lee, Aaron B Baker
Mesenchymal stem cells (MSCs) are an appealing potential therapy for vascular diseases; however, many challenges remain in their clinical translation. While the use of biochemical, pharmacological, and substrate-mediated treatments to condition MSCs has been subjected to intense investigation, there has been far less exploration of using these treatments in combination with applied mechanical force for conditioning MSCs toward vascular phenotypes. This review summarizes the current understanding of the use of applied mechanical forces to differentiate MSCs into vascular cells and enhance their therapeutic potential for cardiovascular disease...
September 25, 2017: Advanced Healthcare Materials
https://www.readbyqxmd.com/read/28944999/systemic-redistribution-of-the-intramyocardially-injected-mesenchymal-stem-cells-by-repeated-remote-ischaemic-post-conditioning
#7
Qin Jiang, Tao Yu, Keli Huang, Hao Zhang, Zhe Zheng, Shengshou Hu
We investigated the effect of repeated remote ischaemic post-conditioning (RIPoC) on the organ distribution of the intramyocardially injected MSCs in rat myocardial ischemia model. Myocardial ischemia of adult female Sprague-Dawley rats was induced by 30-min. obstruction of the left anterior descending coronary artery. Repeated RIPoC was induced after ischemia with three cycles of 5-min. occlusion and reperfusion of the limb with the frequency of half a day, 1 or 2 days, respectively. Compared with that by single RIPoC, repeated RIPoC transiently reduced oxidative stress, lipid peroxidation and inflammation in ischaemic myocardium; the gene expression of stromal cell-derived factor-1 alpha (SDF-1α) was consistently induced by repeated RIPoC procedures...
September 25, 2017: Journal of Cellular and Molecular Medicine
https://www.readbyqxmd.com/read/28944998/enhanced-immune-response-induced-by-p5-her2-neu-derived-peptide-pulsed-dendritic-cells-as-a-preventive-cancer-vaccine
#8
Zahra Gholizadeh, Jalil Tavakkol-Afshari, Amin Reza Nikpoor, Seyed Amir Jalali, Mahmoud Reza Jaafari
Dendritic cells are special and powerful antigen-presenting cells that can induce primary immune responses against tumour-associated antigens. They can present antigens via both MHC-I and MHC-II, so they have the ability to stimulate both cytotoxic T lymphocytes and T helper cells. Furthermore, CD8(+) cytotoxic T lymphocytes require activation by CD4(+) T cells. This requires a CD4(+) T cell activator molecule, of which PADRE is one of the best. We chose an approach to use both of these important arms of the immune system...
September 25, 2017: Journal of Cellular and Molecular Medicine
https://www.readbyqxmd.com/read/28944996/negative-pressure-wound-therapy-promotes-muscle-derived-stem-cell-osteogenic-differentiation-through-mapk-pathway
#9
Hong Liu, Xun Zheng, Liang Chen, Chao Jian, Xiang Hu, Yong Zhao, Zonghuan Li, Aixi Yu
Negative pressure wound therapy (NPWT) has been revealed to be effective in the treatment of open fractures, although the underlying mechanism is not clear. This article aimed to investigate the effects of NPWT on muscle-derived stem cell (MDSC) osteoblastic differentiation and the related potential mechanism. The cell proliferation rate was substantially increased in NPWT-treated MDSCs in comparison with a static group for 3 days. There was no observable effect on the apoptosis of MDSC treated with NPWT compared with the control group for 3 days...
September 25, 2017: Journal of Cellular and Molecular Medicine
https://www.readbyqxmd.com/read/28944991/a-qualitative-study-exploring-midwives-perceptions-and-knowledge-of-maternal-obesity-reflecting-on-their-experiences-of-providing-healthy-eating-and-weight-management-advice-to-pregnant-women
#10
Mary T McCann, Lisa Newson, Catriona Burden, Jane S Rooney, Margaret S Charnley, Julie C Abayomi
Midwives are responsible for providing advice regarding the complex issues of healthy eating and weight management during pregnancy. This study utilised an inductive data-driven thematic approach in order to determine midwives' perceptions, knowledge, and experiences of providing healthy eating and weight management advice to pregnant women. Semistructured interviews with 17 midwives were transcribed verbatim and data subjected to thematic analysis. The findings offer insight into the challenges facing midwives in their role trying to promote healthy eating and appropriate weight management to pregnant women...
September 25, 2017: Maternal & Child Nutrition
https://www.readbyqxmd.com/read/28944986/development-and-in-vitro-in-vivo-evaluation-of-a-novel-benznidazole-liquid-dosage-form-using-a-quality-by-design-approach
#11
Higo Fernando Santos Souza, Daniel Real, Darío Leonardi, Sandra Carla Rocha, Victoria Alonso, Esteban Serra, Ariel Mariano Silber, Claudio Javier Salomon
OBJECTIVES: To develop an alcohol-free solution suitable for children of benznidazole, the drug of choice for treatment of Chagas disease. METHODS: In a quality-by-design approach a systematic optimization procedure was carried out in order to estimate the values of the factors leading to the maximum drug concentration. The formulations were analyzed in terms of chemical and physical stability and drug content. The final preparation was subjected to an in-vivo palatability assay...
September 25, 2017: Tropical Medicine & International Health: TM & IH
https://www.readbyqxmd.com/read/28944985/ultrasound-characteristics-of-endometrial-cancer-as-defined-by-the-international-endometrial-tumor-analysis-ieta-consensus-nomenclature-a-prospective-multicenter-study
#12
Elisabeth Epstein, Daniela Fischerova, Lil Valentin, Antonia Carla Testa, Dorella Franchi, Povilas Sladkevicius, Frühauf Filip, Pelle G Lindqvist, Floriana Mascilini, Robert Fruscio, Lucia Anna Haak, Gina Opolskiene, Maria Angela Pascual, Juan Luis Alcazar, Valentina Chiappa, Stefano Guerriero, Joseph Carlson, Caroline Van Holsbeke, Francesco Paolo Giuseppe Leone, Bart De Moor, Tom Bourne, Ben van Calster, Arnaud Installe, Dirk Timmerman, Jan Y Verbakel, Thierry Van den Bosch
OBJECTIVES: To describe the sonographic features of endometrial cancer in relation to stage, grade, and histological type using the International Endometrial Tumor Analysis (IETA) terminology. METHODS: Prospective multicenter study on 1714 women with endometrial cancer undergoing a standardized transvaginal grayscale and Doppler ultrasound examination by an experienced ultrasound examiner using a high-end ultrasound system. Clinical and sonographic data were entered into a web-based protocol...
September 25, 2017: Ultrasound in Obstetrics & Gynecology
https://www.readbyqxmd.com/read/28944981/a-qualitative-study-on-the-attributes-of-nurses-workplace-social-capital-in-japan
#13
Kensuke Norikoshi, Toshio Kobayashi, Keiji Tabuchi
AIM: To identify attributes of nurses' workplace social capital in Japan. BACKGROUND: Much attention has been paid to nurses' workplace social capital to improve the quality of the work environment; however, few studies are available on the attributes of nurses' workplace social capital. METHODS: Semi-structured interviews were conducted with 32 nurses at seven hospitals. Nurses reported on the attributes of workplace social capital, such as characteristics facilitating individual positive action in an organisation, which were qualitatively analysed using the Kawakita Jiro method...
September 25, 2017: Journal of Nursing Management
https://www.readbyqxmd.com/read/28944980/failure-mode-and-effects-analysis-a-community-practice-perspective
#14
Bradley W Schuller, Angi Burns, Elizabeth A Ceilley, Alan King, Joan LeTourneau, Alexander Markovic, Lynda Sterkel, Brigid Taplin, Jennifer Wanner, Jeffrey M Albert
PURPOSE: To report our early experiences with failure mode and effects analysis (FMEA) in a community practice setting. METHODS: The FMEA facilitator received extensive training at the AAPM Summer School. Early efforts focused on department education and emphasized the need for process evaluation in the context of high profile radiation therapy accidents. A multidisciplinary team was assembled with representation from each of the major department disciplines. Stereotactic radiosurgery (SRS) was identified as the most appropriate treatment technique for the first FMEA evaluation, as it is largely self-contained and has the potential to produce high impact failure modes...
September 25, 2017: Journal of Applied Clinical Medical Physics
https://www.readbyqxmd.com/read/28944979/dosimetric-validation-of-monaco-treatment-planning-system-on-an-elekta-versahd-linear-accelerator
#15
Ganesh Narayanasamy, Daniel L Saenz, Dewayne Defoor, Niko Papanikolaou, Sotirios Stathakis
The purpose of this study is to perform dosimetric validation of Monaco treatment planning system version 5.1. The Elekta VersaHD linear accelerator with high dose rate flattening filter-free photon modes and electron energies was used in this study. The dosimetric output of the new Agility head combined with the FFF photon modes warranted this investigation into the dosimetric accuracy prior to clinical usage. A model of the VersaHD linac was created in Monaco TPS by Elekta using commissioned beam data including percent depth dose curves, beam profiles, and output factors...
September 25, 2017: Journal of Applied Clinical Medical Physics
https://www.readbyqxmd.com/read/28944971/a-parallel-mr-imaging-method-using-multilayer-perceptron
#16
Kinam Kwon, Dongchan Kim, HyunWook Park
PURPOSE: To reconstruct MR images from subsampled data, we propose a fast reconstruction method using the multilayer perceptron (MLP) algorithm. METHODS AND MATERIALS: We applied MLP to reduce aliasing artifacts generated by subsampling in k-space. The MLP is learned from training data to map aliased input images into desired alias-free images. The input of the MLP is all voxels in the aliased lines of multi-channel real and imaginary images from the subsampled k-space data, and the desired output is all voxels in the corresponding alias-free line of the root-sum-of-squares of multi-channel images from fully-sampled k-space data...
September 25, 2017: Medical Physics
https://www.readbyqxmd.com/read/28944948/use-and-modifications-of-cervical-and-upper-thoracic-laminar-screws-in-posterior-stabilization
#17
Burak Eren, Azmi Tufan, Feyza Karagöz Güzey, İlker Güleç, Abdurrahim Taş, Özgür Yusuf Aktaş, Mustafa Safi Vatansever, Ebru Doruk, Murat Yücel, Mustafa Örnek
AIM: Laminar screw technique is used to stabilize C2 and other levels when other techniques cannot be performed. MATERIAL AND METHODS: The patients underwent laminar screws at cervical and upper thoracic levels in our clinic during 5 yearswere evaluated retrospectively. RESULTS: In 25 patients, 6 to 82 years old,total 54 laminar screws were used. Most frequent diagnoses were cervical spinal stenosis and craniovertebraljunction anomalies.There were handicaps to perform other type of screwsin 19 out of 25 screws during first 4 years, and 9 out of 29 in the last year (p=0...
July 16, 2017: Turkish Neurosurgery
https://www.readbyqxmd.com/read/28944943/effect-of-systemic-application-of-bone-marrow-derived-mesenchymal-stem-cells-on-healing-of-peripheral-nerve-injury-in-an-experimental-sciatic-nerve-injury-model
#18
Zahir Kizilay, Serdar Aktas, Nesibe Kahraman Cetin, Didem Bakay Ilhan, Gulfem Ersoy, Haydar Ali Erken
AIM: To investigate the effects of systemic application of bone marrow-derived mesenchymal stem cells in a compression model of peripheral nerve injury. MATERIAL AND METHODS: 24 male Wistar albino rats were randomly divided into 3 equal groups (n=8):Control (C),injury (I),and stem cell and injury (SI).The sciatic nerve of rats in the I and SI groups was subjected to clip compression for 5 minutes.Moreover,approximately 5x105 bone marrow-derived mesenchymal stem cells were given via tail vein of the rats in the SI group immediately after clip compression...
July 12, 2017: Turkish Neurosurgery
https://www.readbyqxmd.com/read/28944941/proconvulsant-effect-of-papaverine-on-penicillin-induced-epileptiform-activity-in-rats
#19
Abdullah Hilmi Marangoz, Suleyman Emre Kocacan, Aydın Him, Enis Kuruoglu, Cengiz Cokluk, Cafer Marangoz
AIM: Papaverine is a vasodilator agent that is an opium alkaloid. It exhibits its effects by inhibiting phosphodiesterase enzyme. Papaverine administration is widely used to avoid symptomatic vasospasm after subarachnoid hemorrhage. We aim in this research to study the effects of papaverine on the epileptic discharges stimulated by penicillin. MATERIAL AND METHODS: Adult female Wistar rats (220±30 g) were included in this research (n=30). Rats were anesthetized with urethane (1...
July 11, 2017: Turkish Neurosurgery
https://www.readbyqxmd.com/read/28944939/there-is-no-remarkable-differences-between-the-pedicle-screw-and-hybrid-construct-about-the-correction-of-lenke-type-i-curves
#20
Ulaş Serarslan, Emin Alici, Ömer Akçali, Can Koşay, Meriç Unal, Alper Gultekin
AIM: Lenke type-1, primary main thoracic curve pattern, is the most common spinal deformity pattern in adolescent idiopathic scoliosis (AIS). Posterior spinal fusion with all screw instrumentation or hybrid type instrumentation has been shown to achieve reliable deformity correction. The aim of this study is to compare deformity correction success of segmental pedicle screw and hybrid instrumentation for the treatment of Lenke type-1 AIS curves. MATERIAL AND METHODS: Surgically treated Lenke type-1 scoliosis patients were retrospectively evaluated and data of 26 patients that treated with hybrid instrumentation were included into first group...
July 12, 2017: Turkish Neurosurgery
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