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https://www.readbyqxmd.com/read/28544046/time-related-changes-in-firing-rates-are-influenced-by-recruitment-threshold-and-twitch-force-potentiation-in-the-first-dorsal-interosseous
#1
Jonathan D Miller, Trent J Herda, Michael A Trevino, Adam J Sterczala, Anthony B Ciccone
There are contradictory reports regarding changes in motor unit firing rates during steady force contractions. Inconsistencies are likely the result of previous studies disregarding motor unit recruitment thresholds and not examining firing rates on a subject-by-subject basis. It is hypothesized that firing rates are manipulated by twitch force potentiation during contractions. Therefore, this study examined time-related changes in firing rates at steady force in relation to motor unit recruitment threshold in the first dorsal interosseous and the influence of twitch force potentiation on such changes in young versus aged individuals...
May 24, 2017: Experimental Physiology
https://www.readbyqxmd.com/read/28535921/out-of-field-in-vivo-dosimetry-using-tld-in-sabr-for-primary-kidney-cancer-involving-mixed-photon-fields
#2
P Lonski, S Keehan, S Siva, D Pham, R D Franich, M L Taylor, T Kron
PURPOSE: To assess out-of-field dose using three different variants of LiF thermoluminescence dosimeters (TLD) for ten patients who underwent stereotactic ablative body radiotherapy (SABR) for primary renal cell carcinoma (RCC) and compare with treatment planning system (TPS) dose calculations. METHODS AND MATERIALS: Thermoluminescent dosimeter (TLD) measurements were conducted at 20, 30, 40 and 50cm from isocentre on ten patients undergoing SABR for primary RCC...
May 2017: Physica Medica: PM
https://www.readbyqxmd.com/read/28535865/intraperitoneal-administration-of-ethanol-as-a-means-of-euthanasia-for-neonatal-mice-mus-musculus
#3
Cecilia de Souza Dyer, Angela K Brice, James O Marx
The humane euthanasia of animals in research is of paramount importance. Neonatal mice frequently respond differently to euthanasia agents when compared with adults. The AVMA's Guidelines for the Euthanasia of Animals includes intraperitoneal injection of ethanol as "acceptable with conditions," and recent work confirmed that this method is appropriate for euthanizing adult mice, but neonatal mice have not been tested. To explore this method in neonatal mice, mouse pups (C57BL/6 and CD1, 162 total) were injected with 100% ethanol, a pentobarbital-phenytoin combination, or saline at 7, 14, 21, 28, or 35 d of age...
May 1, 2017: Journal of the American Association for Laboratory Animal Science: JAALAS
https://www.readbyqxmd.com/read/28535555/paresthesia-independence-an-assessment-of-technical-factors-related-to-10-khz-paresthesia-free-spinal-cord-stimulation
#4
Giuliano De Carolis, Mery Paroli, Lara Tollapi, Matthew W Doust, Abram H Burgher, Cong Yu, Thomas Yang, Donna M Morgan, Kasra Amirdelfan, Leonardo Kapural, B Todd Sitzman, Richard Bundschu, Ricardo Vallejo, Ramsin M Benyamin, Thomas L Yearwood, Bradford E Gliner, Ashley A Powell, Kerry Bradley
BACKGROUND: Spinal cord stimulation (SCS) has been successfully used to treat chronic intractable pain for over 40 years. Successful clinical application of SCS is presumed to be generally dependent on maximizing paresthesia-pain overlap; critical to achieving this is positioning of the stimulation field at the physiologic midline. Recently, the necessity of paresthesia for achieving effective relief in SCS has been challenged by the introduction of 10 kHz paresthesia-free stimulation...
May 2017: Pain Physician
https://www.readbyqxmd.com/read/28534180/the-c-terminal-kinesin-motor-kifc1-may-participate-in-nuclear-reshaping-and-flagellum-formation-during-spermiogenesis-of-larimichthys-crocea
#5
Dan-Dan Zhang, Xin-Ming Gao, Yong-Qiang Zhao, Cong-Cong Hou, Jun-Quan Zhu
Spermatogenesis is a highly ordered process in the differentiation of male germ cells. Nuclear morphogenesis is one of the most fundamental cellular transformations to take place during spermatogenesis. These striking transformations from spermatogonia to spermatozoa are a result of phase-specific adaption of the cytoskeleton and its association with molecular motor proteins. KIFC1 is a C-terminal kinesin motor protein that plays an essential role in acrosome formation and nuclear reshaping during spermiogenesis in mammals...
May 23, 2017: Fish Physiology and Biochemistry
https://www.readbyqxmd.com/read/28530309/-monitoring-units-in-departments-of-internal-medicine-frequency-impact-and-satisfaction
#6
David Raveh-Brawer, Tanya Itzekson, Ruth Henshke-Bar-Meir, Noa Sylvetsky, Reuven Friedmann, Ranana Siegman, Tanya Mor, Moshe Hersch, Amos M Yinnon, Shoshana Zevin
BACKGROUND: Due to increasing numbers of elderly, seriously ill patients and shortage of ICU beds, many hospitals have established monitoring units (MU) in their medical departments. OBJECTIVES: (1) To assess the national prevalence of MUs in medical departments; (2) to determine the outcome of consecutively admitted MU patients; (3) to evaluate patient/ family satisfaction with care. METHODS: The case control study included all 123 patients hospitalized in the MU during a 5-month period, compared with two control groups: (1) 123 patients admitted to medical departments, matched at a ratio of 1:1 by gender, age±10 years and mechanical ventilation; (2) all 52 medical patients treated in the ICU...
January 2017: Harefuah
https://www.readbyqxmd.com/read/28527269/-first-evidence-of-lymphocytic-choriomeningitis-virus-arenavirus-infection-in-mus-musculus-rodents-captured-in-the-urban-area-of-the-municipality-of-sincelejo-sucre-colombia
#7
Anais Castellar, Marco Guevara, Juan D Rodas, Andrés F Londoño, Esteban Arroyave, Francisco J Díaz, Silvana Levis, Pedro J Blanco
INTRODUCTION: The lymphocytic choriomeningitis virus is an Old World arenavirus that infects Mus musculus, and can cause congenital hydrocephalus, chorioretinitis and multisystemic failure in transplant human recipients. Although the disease has not been clinically diagnosed in Colombia yet, there have been reports of infection with the Pichindé virus in rodents from Cauca and Valle del Cauca departments, and with the Guanarito virus in rodents from Córdoba department. OBJECTIVE: To identify the lymphocytic choriomeningitis virus from Mus musculus captured in the municipality of Sincelejo...
April 1, 2017: Biomédica: Revista del Instituto Nacional de Salud
https://www.readbyqxmd.com/read/28524717/first-molecular-evidence-of-mus-musculus-bactrianus-in-nepal-inferred-from-the-mitochondrial-dna-cytochrome-b-gene-sequences
#8
Pradeep Adhikari, Sang-Hyun Han, Yoo-Kyung Kim, Tae-Wook Kim, Tej Bahadur Thapa, Naresh Subedi, Prabhat Adhikari, Hong-Shik Oh
To identify the house mice collected in Pokhara and Lumbini of Nepal at the subspecies level, morphological and molecular analyses were carried out. Morphologically, two populations collected in Pokhara and Lumbini were distinguished by fur colour, but there was no significant difference in external measurements (p > .05). The phylogenetic analysis results revealed that the haplotypes sequences of mitochondrial DNA (mtDNA) Cytochrome B (CytB) gene distinguished into two distinct clades on a phylogenetic tree representing two subspecies, Mus musculus bactrianus and M...
May 19, 2017: Mitochondrial DNA. Part A. DNA Mapping, Sequencing, and Analysis
https://www.readbyqxmd.com/read/28523700/balancing-medical-accuracy-and-diagnostic-consequences-diagnosing-medically-unexplained-symptoms-in-primary-care
#9
Erik B Rasmussen
Focusing on the case of medically unexplained symptoms (MUS), this article explores diagnostic classification in the absence of biomedical evidence or other strong medical warrants for diagnosis. The data are from three focus group interviews with Norwegian general practitioners (GPs) conducted in 2015, that centred on the issue of what diagnoses to use (or not) for MUS. The qualitative analysis reconstructs the logic underlying GPs' diagnostic accounts, which centred on the meaning of diagnostic categories and on anticipating how 'generalised others' would respond to those meanings (called 'diagnosing by anticipation')...
May 18, 2017: Sociology of Health & Illness
https://www.readbyqxmd.com/read/28521451/dosimetric-comparison-of-intensity-modulated-radiation-therapy-and-volumetric-modulated-arc-therapy-plans-for-the-treatment-of-glioma-using-flattening-filter-free-and-flattening-filter-modes
#10
Dandan Xu, Fei Jia, Guowen Li, Hongfei Li
In the present study, the dose verification between 6X and 6X flattening filter-free (FFF) in intensity-modulated radiation therapy (IMRT) and volumetric modulated arc therapy (VMAT) was compared, and the advantages and disadvantages of different radiotherapy plans were evaluated. All four plans achieved comparable heterogeneity and conformity indices. For frontal tumor, VMAT demonstrated more improved sparing of the brainstem compared with the IMRT (P=0.045); while in the model of FFF, the Dmax of eye lens was significantly reduced by 16-21% (P<0...
May 2017: Oncology Letters
https://www.readbyqxmd.com/read/28517613/a-quantitative-method-to-the-analysis-of-mlc-leaf-position-and-speed-based-on-epid-and-ebt3-film-for-dynamic-imrt-treatment-with-different-types-of-mlc
#11
Yinghui Li, Lixin Chen, Jinhan Zhu, Bin Wang, Xiaowei Liu
A quantitative method based on the electronic portal imaging system (EPID) and film was developed for MLC position and speed testing; this method was used for three MLC types (Millennium, MLCi, and Agility MLC). To determine the leaf position, a picket fence designed by the dynamic (DMLC) model was used. The full-width half-maximum (FWHM) values of each gap measured by EPID and EBT3 were converted to the gap width using the FWHM versus nominal gap width relationship. The algorithm developed for the picket fence analysis was able to quantify the gap width, the distance between gaps, and each individual leaf position...
May 18, 2017: Journal of Applied Clinical Medical Physics
https://www.readbyqxmd.com/read/28517492/practical-considerations-of-linear-accelerator-based-frameless-extracranial-radiosurgery-for-treatment-of-occipital-neuralgia-for-nonsurgical-candidates
#12
Travis R Denton, Lisa B E Shields, Jonathan N Howe, Todd S Shanks, Aaron C Spalding
Occipital neuralgia generally responds to medical or invasive procedures. Repeated invasive procedures generate increasing complications and are often contraindicated. Stereotactic radiosurgery (SRS) has not been reported as a treatment option largely due to the extracranial nature of the target as opposed to the similar, more established trigeminal neuralgia. A dedicated phantom study was conducted to determine the optimum imaging studies, fusion matrices, and treatment planning parameters to target the C2 dorsal root ganglion which forms the occipital nerve...
May 18, 2017: Journal of Applied Clinical Medical Physics
https://www.readbyqxmd.com/read/28516833/animal-models-of-ebolavirus-infection
#13
Marisa C St Claire, Dan R Ragland, Laura Bollinger, Peter B Jahrling
Ebola virus is a highly pathogenic member of the family Filoviridae that causes a severe hemorrhagic disease in humansand NHP. The 2013-2016 West African outbreak has increased interest in the development and refinement of animal models of Ebola virus disease. These models are used to test countermeasures and vaccines, gain scientific insights into the mechanisms of disease progression and transmission, and study key correlates of immunology. Ebola virus is classified as a BSL4 pathogen and Category A agent, for which the United States government requires preparedness in case of bioterrorism...
May 17, 2017: Comparative Medicine
https://www.readbyqxmd.com/read/28515303/spontaneous-and-vaccine-induced-clearance-of-mus-musculus-papillomavirus-type-1-mmupv1-muspv1-infection
#14
Rosie T Jiang, Joshua W Wang, Shiwen Peng, Tsui-Chin Huang, Chenguang Wang, Fabiana Cannella, Yung-Nien Chang, Raphael P Viscidi, Simon R A Best, Chien-Fu Hung, Richard B S Roden
Mus musculus Papillomavirus1 (MmuPV1/MusPV1) induces persistent papillomas in immunodeficient mice but not common laboratory strains. To facilitate study of immune control, we sought an outbred and immune competent laboratory mouse strain in which persistent papillomas could be established. We found that challenge of SKH1 mice (Crl:SKH1-Hrhr) by scarification on their tail with MmuPV1 resulted in three clinical outcomes: 1) persistent (>2 months) papillomas (∼20%), 2) transient papillomas that spontaneously regress typically within 2 months (∼15%), 3) no visible papillomas and viral clearance (∼65%)...
May 17, 2017: Journal of Virology
https://www.readbyqxmd.com/read/28508748/macrophages-are-necessary-for-epimorphic-regeneration-in-african-spiny-mice
#15
Jennifer Simkin, Thomas R Gawriluk, John C Gensel, Ashley W Seifert
How the immune system affects tissue regeneration is not well understood. In this study, we used an emerging mammalian model of epimorphic regeneration, the African spiny mouse, to examine cell-based inflammation and tested the hypothesis that macrophages are necessary for regeneration. By directly comparing inflammatory cell activation in a 4 mm ear injury during regeneration (Acomys cahirinus) and scarring (Mus musculus), we found that both species exhibited an acute inflammatory response, with scarring characterized by stronger myeloperoxidase activity...
May 16, 2017: ELife
https://www.readbyqxmd.com/read/28503758/postnatal-mandible-growth-in-wild-and-laboratory-mice-differences-revealed-from-bone-remodeling-patterns-and-geometric-morphometrics
#16
Jessica Martínez-Vargas, Francesc Muñoz-Muñoz, Cayetana Martinez-Maza, Amalia Molinero, Jacint Ventura
Comparative information on the variation in the temporospatial patterning of mandible growth in wild and laboratory mice during early postnatal ontogeny is scarce but important to understand variation among wild rodent populations. Here, we compare mandible growth between two ontogenetic series from the second to the eighth week of postnatal life, corresponding to two different groups of mice reared under the same conditions: the classical inbred strain C57BL/6J, and Mus musculus domesticus. We characterize the ontogenetic patterns of bone remodeling of the mandibles belonging to these laboratory and wild mice by analyzing bone surface, as well as examine their ontogenetic form changes and bimodular organization using geometric morphometrics...
May 14, 2017: Journal of Morphology
https://www.readbyqxmd.com/read/28498403/mus-musculus-microrna-449a-ameliorates-neuropathic-pain-by-decreasing-the-level-of-kcnma1-and-trpa1-and-increasing-the-level-of-tpte
#17
Shan Lu, Sichao Ma, Yunyun Wang, Tao Huang, Zhihua Zhu, Guoqing Zhao
Neuropathic pain is a nerve disorder characterized by the dysregulation of ion channels in dorsal root ganglion (DRG) neurons. MicroRNAs (miRs) may be associated with the molecular mechanisms underlying the altered levels of ion channels; however, the molecular mechanisms remain widely unknown. To investigate these mechanisms, the present study conducted a genomic analysis of miR between a unilateral spared nerve injury (SNI) model and sham control. Differentially expressed miRs between the SNI and sham groups were selected for transfection of DRG cells, a polymerase chain reaction (PCR) array analysis was subsequently performed...
May 10, 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/28497813/warming-the-mouse-to-model-human-diseases
#18
REVIEW
Kirthana Ganeshan, Ajay Chawla
Humans prefer to live within their thermal comfort or neutral zone, which they create by making shelters, wearing clothing and, more recently, by regulating their ambient temperature. These strategies enable humans to maintain a constant core temperature (a trait that is conserved across all endotherms, including mammals and birds) with minimal energy expenditure. Although this primordial drive leads us to seek thermal comfort, we house our experimental animals, laboratory mice (Mus musculus), under conditions of thermal stress...
May 12, 2017: Nature Reviews. Endocrinology
https://www.readbyqxmd.com/read/28490344/dosimetric-advantage-of-volumetric-modulated-arc-therapy-in-the-treatment-of-intraocular-cancer
#19
Zhenxiang Deng, Lanxiao Shen, Xiaomin Zheng, Yongqiang Zhou, Jinling Yi, Ce Han, Congying Xie, Xiance Jin
OBJECTIVE: The purpose of this study is to investigate the dosimetric advantages of volumetric modulated arc therapy (VMAT) in the treatment of intraocular cancer by comparing it directly with three-dimensional conformal radiotherapy (CRT) and intensity-modulated radiotherapy (IMRT). METHODS: CRT plan, 7f-IMRT plan, and one-arc VMAT plan were generated for 14 intraocular cancer patients. Dosimetric and biological quality indices for target volume and organs at risks (OARs) were evaluated and compared...
May 10, 2017: Radiation Oncology
https://www.readbyqxmd.com/read/28487860/chromosome-1-sequence-analysis-of-c57bl-6j-chr1-km-mouse-strain
#20
Fuyi Xu, Tianzhu Chao, Yiyin Zhang, Shixian Hu, Yuxun Zhou, Hongyan Xu, Junhua Xiao, Kai Li
The Chinese Kunming (KM) mouse is a widely used outbred mouse stock in China. However, its genetic structure remains unclear. In this study, we sequenced the genome of the C57BL/6J-Chr1(KM) (B6-Chr1(KM)) strain, the chromosome 1 (Chr 1) of which was derived from one KM mouse. With 36.6× average coverage of the entire genome, 0.48 million single nucleotide polymorphisms (SNPs) and 96,679 indels were detected on Chr 1 through comparison with reference strain C57BL/6J. Moreover, 46,590 of them were classified as novel mutations...
2017: International Journal of Genomics
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