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https://www.readbyqxmd.com/read/28532041/comparative-analysis-of-stress-in-a-new-proposal-of-dental-implants
#1
Mariana Lima da Costa Valente, Denise Tornavoi de Castro, Ana Paula Macedo, Antonio Carlos Shimano, Andréa Cândido Dos Reis
The purpose of this study was to compare, through photoelastic analysis, the stress distribution around conventional and modified external hexagon (EH) and morse taper (MT) dental implant connections. Four photoelastic models were prepared (n=1): Model 1 - conventional EH cylindrical implant (Ø 4.0mm×11mm - Neodent®), Model 2 - modified EH cylindrical implant, Model 3 - conventional MT Conical implant (Ø 4.3mm×10mm - Neodent®) and Model 4 - modified MT conical implant. 100 and 150N axial and oblique loads (30° tilt) were applied in the devices coupled to the implants...
August 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/28531887/expression-and-characterization-of-membrane-type-4-matrix-metalloproteinase-mt4-mmp-and-its-different-forms-in-melanoma
#2
Bettina Hieronimus, Julian Pfohl, Christian Busch, Lutz Graeve
BACKGROUND/AIMS: Membrane-type matrix metalloproteinases (MT-MMPs) are expressed on the cell surface and hydrolyze extracellular matrix components and signaling molecules by which they influence cancer cell migration and metastasis. Two of the six known MT-MMPs are anchored to the plasma membrane via a GPI anchor, one of which is MT4-MMP. Only little is known about MT4-MMP expression, synthesis, regulation and degradation. METHODS: We analyzed several human cancer cell lines as well as tissue homogenates using Western blotting and quantitative PCR for the expression of MT4-MMP...
May 25, 2017: Cellular Physiology and Biochemistry
https://www.readbyqxmd.com/read/28531364/analysis-of-the-internal-transcribed-spacer-region-of-ascaris-suum-and-ascaris-lumbricoides-derived-from-free-range-tibetan-pigs
#3
Kun Li, Houqiang Luo, Hui Zhang, Khalid Mehmood, Muhammad Shahzad, Lihong Zhang, Jiakui Li
Ascaris suum (A. suum) is the most commonly occurring worldwide internal parasite of pigs; however, little is known about this organism in Tibetan pigs in China. A study was carried to isolate and identify the characteristics of internal transcribed spacer region (ITS) gene of A. suum derived from Tibetan pigs. Adult nematodes were collected from Tibetan pigs in 2015-2016. Total genomic DNA of the extracted parasites was performed and a fragment of the ITS of mitochondrial (mt) gene was amplified. The amplicons were cloned into PGEM®-T Easy Vector (Promega, WI) and the positive clones were sequenced by ABI 3730 × 1 sequencer...
May 21, 2017: Mitochondrial DNA. Part A. DNA Mapping, Sequencing, and Analysis
https://www.readbyqxmd.com/read/28530811/multi-targeted-imidazoles-potential-therapeutic-leads-for-alzheimer-s-and-other-neurodegenerative-diseases
#4
Anne-Sophie Cornec, Ludovica Monti, Jane Kovalevich, Vishruti Makani, Michael J James, Krishna G Vijayendran, Killian Oukoloff, Yuemang Yao, Virginia M-Y Lee, John Q Trojanowski, Amos B Smith Iii, Kurt R Brunden, Carlo Ballatore
Alzheimer's disease (AD) is a complex, multifactorial disease in which different neuropathological mechanisms are likely involved, including those associated with pathological tau and Aβ species, as well as neuroinflammation. In this context, the development of single multi-targeted therapeutics directed against two or more disease mechanisms could be advantageous. Starting from a series of 1,5-diarylimidazoles with microtubule (MT)-stabilizing activity and structural similarities with known NSAIDs, we conducted structure-activity relationship studies that led to the identification of multi-targeted prototypes with activities as MT-stabilizing agents and/or inhibitors of the cyclooxygenase (COX) and 5-lipoxygenase (5-LOX) pathways...
May 22, 2017: Journal of Medicinal Chemistry
https://www.readbyqxmd.com/read/28529648/elongated-nanoparticle-aggregates-in-cancer-cells-for-mechanical-destruction-with-low-frequency-rotating-magnetic-field
#5
Yajing Shen, Congyu Wu, Taro Q P Uyeda, Gustavo R Plaza, Bin Liu, Yu Han, Maciej S Lesniak, Yu Cheng
Magnetic nanoparticles (MNPs) functionalized with targeting moieties can recognize specific cell components and induce mechanical actuation under magnetic field. Their size is adequate for reaching tumors and targeting cancer cells. However, due to the nanometric size, the force generated by MNPs is smaller than the force required for largely disrupting key components of cells. Here, we show the magnetic assembly process of the nanoparticles inside the cells, to form elongated aggregates with the size required to produce elevated mechanical forces...
2017: Theranostics
https://www.readbyqxmd.com/read/28528581/organic-zinc-absorption-by-the-intestine-of-broilers-in-vivo
#6
Yu Yu, Lin Lu, Su-Fen Li, Li-Yang Zhang, Xu-Gang Luo
In Expt 1, a Zn-unsupplemented basal diet (control) and the basal diet supplemented with one of four different Zn sources, including ZnSO4, Zn-amino acid chelate with a weak chelation strength (Zn-AA W), Zn-protein chelate with a moderate chelation strength (Zn-Pro M) and Zn-protein chelate with a strong chelation strength (Zn-Pro S) were fed to broiler chickens from days 14 to 28. On day 28, Zn content in plasma from the hepatic portal vein increased (P0·05) and Zn-AA W(P<0·04) were higher than those for ZnSO4...
May 22, 2017: British Journal of Nutrition
https://www.readbyqxmd.com/read/28528361/toward-the-identification-and-the-targeting-of-key-players-of-the-mitochondrial-unfolded-protein-response-upr-mt-in-cancer
#7
EDITORIAL
Doris Germain
No abstract text is available yet for this article.
May 20, 2017: Journal of Bioenergetics and Biomembranes
https://www.readbyqxmd.com/read/28526948/an-innovative-strategy-to-clone-positive-modifier-genes-of-defects-caused-by-mtdna-mutations-mrps18c-as-suppressor-gene-of-m-3946g-a-mutation-in-mt-nd1-gene
#8
María Elena Rodríguez-García, Francisco Javier Cotrina-Vinagre, Patricia Carnicero-Rodríguez, Francisco Martínez-Azorín
We have developed a new functional complementation approach to clone modifier genes which overexpression is able to suppress the biochemical defects caused by mtDNA mutations (suppressor genes). This strategy consists in transferring human genes into respiratory chain-deficient fibroblasts, followed by a metabolic selection in a highly selective medium. We used a normalized expression cDNA library in an episomal vector (pREP4) to transfect the fibroblasts, and a medium with glutamine and devoid of any carbohydrate source to select metabolically...
May 19, 2017: Human Genetics
https://www.readbyqxmd.com/read/28526408/semi-retentive-cytoskeletal-fractionation-sercyf-a-novel-method-for-the-biochemical-analysis-of-the-organization-of-microtubule-and-actin-cytoskeleton-networks
#9
Yuta Sato, Yota Murakami, Masayuki Takahashi
A variety of biochemical fractionation methods are available for the quantification of cytoskeletal components. However, each method is designed to target only one cytoskeletal network, either the microtubule (MT) or actin cytoskeleton, and non-targeted cytoskeletal networks are ignored. Considering the importance of MT-actin crosstalk, the organization of both the targeted and non-targeted cytoskeletal networks must be retained intact during fractionation for the accurate analysis of cytoskeletal organization...
May 16, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/28523373/role-of-sod-gene-in-response-to-static-magnetic-fields-in-pseudomonas-aeruginosa
#10
Raouia Hanini, Abdelwaheb Chatti, Selma Ben Ghorbel, Ahmed Landoulsi
The protective role of superoxide dismutase (SOD) against non-ionizing radiation such as static electromagnetic field (200 mT) has been studied in wild-type and mutant strain of Pseudomonas aeruginosa lacking cytosolic Mn-SOD (sodM), Fe-SOD (sodB), or both SODs (sodMB). Our results showed that inactivation of sodM and/or sodB genes increases the sensitivity of P. aeruginosa toward stress induced by the static magnetic field (200 mT). Furthermore, our results showed an enhancement of SOD, catalase, and peroxidases after exposure to the magnetic field...
May 18, 2017: Current Microbiology
https://www.readbyqxmd.com/read/28522611/long-terminal-repeats-power-evolution-of-genes-and-gene-expression-programs-in-mammalian-oocytes-and-zygotes
#11
Vedran Franke, Sravya Ganesh, Rosa Karlic, Radek Malik, Josef Pasulka, Filip Horvat, Maja Kuzman, Helena Fulka, Marketa Cernohorska, Jana Urbanova, Eliska Svobodova, Jun Ma, Yutaka Suzuki, Fugaku Aoki, Richard M Schultz, Kristian Vlahovicek, Petr Svoboda
Retrotransposons are 'copy-and-paste' insertional mutagens that substantially contribute to mammalian genome content. Retrotransposons often carry long terminal repeats (LTRs) for retrovirus-like reverse transcription and integration into the genome. We report an extraordinary impact of a group of LTRs from the mammalian endogenous retrovirus-related ERVL retrotransposon class on gene expression in the germline and beyond. In mouse, we identified >800 LTRs from ORR1, MT, MT2, and MLT families, which resemble mobile gene-remodeling platforms that supply promoters and first exons...
May 18, 2017: Genome Research
https://www.readbyqxmd.com/read/28521807/case-report-a-novel-frameshift-mutation-in-the-mitochondrial-cytochrome-c-oxidase-ii-gene-causing-mitochondrial-disorder
#12
Laura Kytövuori, Mikko Kärppä, Hannu Tuominen, Johanna Uusimaa, Markku Saari, Reetta Hinttala, Kari Majamaa
BACKGROUND: Mitochondrial cytochrome c oxidase 2, MT-CO2, encodes one of the three subunits, which form the catalytic core of cytochrome c oxidase (COX), complex IV. Mutations in MT-CO2 are rare and the associated phenotypes are variable including nonsyndromic and syndromic forms of mitochondrial diseases. CASE PRESENTATION: We describe a 30-year-old man with cognitive decline, epilepsy, psychosis, exercise intolerance, sensorineural hearing impairment, retinitis pigmentosa, cataract and lactic acidosis...
May 18, 2017: BMC Neurology
https://www.readbyqxmd.com/read/28521395/marsdenia-tenacissima-extract-suppresses-tumor-growth-and-angiogenesis-in-a20-mouse-lymphoma
#13
Xingbin Dai, Yanhua Ji, Pengjun Jiang, Xuemei Sun
Marsdenia tenacissima (MT), a traditional Chinese medicine, has been utilized in the treatment of a variety of malignant conditions for decades, but the underlying mechanism remains unclear. Angiogenesis, new blood vessel formation by nearby endothelial cells (ECs) from pre-existing vessels, plays a key role in cancer growth. In the present study, the effects of MT extract (MTE) on EC proliferation and apoptosis in vitro, and on A20 mouse lymphoma growth and angiogenesis in vivo were investigated. MTE exhibited an anti-proliferative effect on the ECs, with a half maximal inhibitory concentration of 11...
May 2017: Oncology Letters
https://www.readbyqxmd.com/read/28516166/onset-and-remodeling-of-coronal-imbalance-after-selective-posterior-thoracic-fusion-for-lenke-1c-and-2c-adolescent-idiopathic-scoliosis-a-pilot-study
#14
Masayuki Ishikawa, Kai Cao, Long Pang, Nobuyuki Fujita, Mitsuru Yagi, Naobumi Hosogane, Takashi Tsuji, Masafumi Machida, Shinichi Ishihara, Makoto Nishiyama, Yasuyuki Fukui, Masaya Nakamura, Morio Matsumoto, Kota Watanabe
BACKGROUND: Postoperative coronal imbalance is a significant problem after selective thoracic fusion for primary thoracic and compensatory lumbar curves in adolescent idiopathic scoliosis (AIS). However, longitudinal studies on postoperative behavior of coronal balance are lacking. This multicenter retrospective study was conducted to analyze factors related to onset and remodeling of postoperative coronal imbalance after posterior thoracic fusion for Lenke 1C and 2C AIS. METHODS: Twenty-one Lenke 1C or 2C AIS patients, who underwent posterior thoracic fusion ending at L3 or above, were included with a minimum 2-year follow-up...
2017: Scoliosis and Spinal Disorders
https://www.readbyqxmd.com/read/28515626/the-history-of-tuberculosis-from-the-first-historical-records-to-the-isolation-of-koch-s-bacillus
#15
REVIEW
I Barberis, N L Bragazzi, L Galluzzo, M Martini
Tuberculosis (TB) is a contagious, infectious disease, due to Mycobacterium tuberculosis (MT) that has always been a permanent challenge over the course of human history, because of its severe social implications. It has been hypothesized that the genus Mycobacterium originated more than 150 million years ago. In the Middle Ages, scrofula, a disease affecting cervical lymph nodes, was described as a new clinical form of TB. The illness was known in England and France as "king's evil", and it was widely believed that persons affected could heal after a royal touch...
March 2017: Journal of Preventive Medicine and Hygiene
https://www.readbyqxmd.com/read/28514314/infected-tibia-defect-fractures-treated-with-the-masquelet-technique
#16
Julia Mühlhäusser, Jörg Winkler, Reto Babst, Frank J P Beeres
The treatment after open and infected fractures with extensive soft tissue damage and bone deficit remains a challenging clinical problem. The technique described by Masquelet, using a temporary cement spacer to induce a membrane combined with reconstructive soft tissue coverage, is a possible solution. This study describes the work-up, operative procedure, complications, and the outcome of a homogenous group of patients with an open and infected tibia fracture and segmental bone loss treated with the Masquelet technique (MT)...
May 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28512204/the-human-rna-binding-protein-rbfa-promotes-the-maturation-of-the-mitochondrial-ribosome
#17
Agata Rozanska, Ricarda Richter-Dennerlein, Joanna Rorbach, Fei Gao, Richard J Lewis, Zofia M Chrzanowska-Lightowlers, Robert N Lightowlers
Accurate assembly and maturation of human mitochondrial ribosomes is essential for synthesis of the 13 polypeptides encoded by the mitochondrial genome. This process requires the correct integration of 80 proteins, 1 mt-tRNA and 2 mt-rRNA species, the latter being post-transcriptionally modified at a number of sites. Here, we report that human RBFA is a mitochondrial RNA-binding protein that exerts crucial roles in mitoribosome biogenesis. Unlike its bacterial orthologue, RBFA associates mainly with helix 44 and 45 of the 12S rRNA in the mitoribosomal small subunit to promote dimethylation of 2 highly conserved consecutive adenines...
May 16, 2017: Biochemical Journal
https://www.readbyqxmd.com/read/28510268/effect-of-intervention-initiation-timing-of-pulsed-electromagnetic-field-on-ovariectomy-induced-osteoporosis-in-rats
#18
Jun Zhou, Yuan Liao, Yahua Zeng, Haitao Xie, Chengxiao Fu, Neng Li
The aim of this study is to explore the effect of timing of initiation of pulsed electromagnetic field (PEMF) therapy on bone mass, microarchitecture, and biomechanical properties, and to investigate receptor activator of NF-kB (RANK) expression in ovariectomized (OVX) rats. Sixty female Sprague-Dawley rats were randomly divided into two equal batches of three groups each (10 rats in each group). The first batch comprised of sham-operated (Sham-0 group), ovariectomized (OVX-0 group), and ovariectomized plus treated with PEMF starting from the day of OVX (Early PEMF group)...
May 16, 2017: Bioelectromagnetics
https://www.readbyqxmd.com/read/28510013/nmr-magnetization-transfer-analysis-of-rapid-membrane-transport-in-human-erythrocytes
#19
REVIEW
Dmitry Shishmarev, Philip W Kuchel
Nuclear magnetic resonance (NMR) magnetization-transfer (MT) experiments provide a convenient tool for studying rapid sub-second membrane-transport processes in situ in metabolically active cells. These experiments are used with membrane-permeable substances when separate (resolved) NMR signals are observed from their populations inside and outside the cells. Here, we provide a description of the theory and practice of the most common NMR MT experiments that have been used to study membrane-transport processes in human erythrocytes (red blood cells; RBCs)...
December 2016: Biophysical Reviews
https://www.readbyqxmd.com/read/28508117/single-center-experience-using-the-3max-reperfusion-catheter-for-the-treatment-of-acute-ischemic-stroke-with-distal-arterial-occlusions
#20
Kévin Premat, Bruno Bartolini, Flore Baronnet-Chauvet, Eimad Shotar, Vincent Degos, Paul Muresan, Federico Di Maria, Joseph Gabrieli, Charlotte Rosso, Silvia Pistocchi, Jacques Chiras, Nader Sourour, Sonia Alamowitch, Yves Samson, Frédéric Clarençon
PURPOSE: Most recent guidelines recommend the use of stent retriever devices in endovascular treatment of acute ischemic stroke with large vessel occlusion (LVO). Recently published data reported convincing results with thromboaspiration devices such as the Penumbra System (Penumbra, Alameda, CA, USA) combined with supple reperfusion catheters by using the ADAPT (A Direct Aspiration First-Pass Thrombectomy) technique. The aim of this study was to report our initial experience with the 3MAX (3...
May 15, 2017: Clinical Neuroradiology
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