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https://www.readbyqxmd.com/read/28643347/off-resonance-based-assessment-of-metallic-wear-debris-near-total-hip-arthroplasty
#1
Kevin M Koch, Matthew F Koff, Thomas W Bauer, Parina H Shah, Andrew S Nencka, S Sivaram Kaushik, Hollis G Potter
PURPOSE: The presence of metallic debris near total hip arthroplasty can have a significant impact on longitudinal patient management. Methods for magnetic resonance imaging-based quantification of metallic debris near painful total hip replacements are described and applied to cohorts of symptomatic and control subject cases. METHODS: A combination of metal artifact reduction, off-resonance mapping, off-resonance background removal, and spatial clustering methods are utilized to quantify off-resonance signatures in cases of suspected metallosis...
June 22, 2017: Magnetic Resonance in Medicine: Official Journal of the Society of Magnetic Resonance in Medicine
https://www.readbyqxmd.com/read/28629211/effect-of-methoxsalen-on-ca%C3%A2-%C3%A2-%C2%BA-homeostasis-and-viability-in-human-osteosarcoma-cells
#2
Yi-Chau Lu, Chiang-Ting Chou, Wei-Zhe Liang, Chun-Chi Kuo, Shu-Shong Hsu, Jue-Long Wang, Chung-Ren Jan
Methoxsalen is a natural compound found in many seed plants. The effect of methoxsalen on Ca²⁺- related physiology in human osteosarcoma is unclear. This study investigated the effect of methoxsalen on cytosolic free Ca²⁺ concentrations ([Ca²⁺]i) in MG63 human osteosarcoma cells. Methoxsalen induced [Ca²⁺]i rises concentration-dependently. Methoxsalen-induced Ca²⁺ entry was confirmed by Mn²⁺-induced quench of fura-2 fluorescence. This Ca²⁺ entry was suppressed by nifedipine, econazole, and SKF96365...
June 30, 2017: Chinese Journal of Physiology
https://www.readbyqxmd.com/read/28599311/c-terminal-kinesin-motor-kifc1-participates-in-facilitating-proper-cell-division-of-human-seminoma
#3
Yu-Xi Xiao, Hao-Qing Shen, Zhen-Yu She, Li Sheng, Qian-Qian Chen, Yu-Lan Chu, Fu-Qing Tan, Wan-Xi Yang
C-terminus kinesin motor KIFC1 is known for centrosome clustering in cancer cells with supernumerary centrosomes. KIFC1 crosslinks and glides on microtubules (MT) to assist normal bipolar spindle formation to avoid multi-polar cell division, which might be fatal. Testis cancer is the most common human cancer among young men. However, the gene expression profiles of testis cancer is still not complete and the expression of the C-terminus kinesin motor KIFC1 in testis cancer has not yet been examined. We found that KIFC1 is enriched in seminoma tissues in both mRNA level and protein level, and is specifically enriched in the cells that divide actively...
May 24, 2017: Oncotarget
https://www.readbyqxmd.com/read/28598606/4s-hydroxylation-of-insulin-at-prob28-accelerates-hexamer-dissociation-and-delays-fibrillation
#4
Seth A Lieblich, Katharine Y Fang, Jackson K B Cahn, Jeffrey Rawson, Jeanne LeBon, H Teresa Ku, David A Tirrell
Daily injections of insulin provide lifesaving benefits to millions of diabetics. But currently available prandial insulins are suboptimal: The onset of action is delayed by slow dissociation of the insulin hexamer in the subcutaneous space, and insulin forms amyloid fibrils upon storage in solution. Here we show, through the use of noncanonical amino acid mutagenesis, that replacement of the proline residue at position 28 of the insulin B-chain (ProB28) by (4S)-hydroxyproline (Hzp) yields an active form of insulin that dissociates more rapidly, and fibrillates more slowly, than the wild-type protein...
June 20, 2017: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/28594110/novel-application-of-fluorescence-coupled-capillary-electrophoresis-to-resolve-the-interaction-between-the-g-quadruplex-aptamer-and-thrombin
#5
Jianhao Wang, Yaqin Gu, Li Liu, Cheli Wang, Jianpeng Wang, Shumin Ding, Jinping Li, Lin Qiu, Pengju Jiang
The dynamic binding status between the thrombin and its G-quadruplex aptamers and the stability of its interaction partners were probed using our previously established fluorescence-coupled capillary electrophoresis method. A 29-nucleic acid thrombin-binding aptamer was chosen as a model to study its binding affinity with the thrombin ligand. Firstly, the effects of the cations on the formation of G-quadruplex from unstructured 29-nucleic acid thrombin-binding aptamer were examined. Secondly, the rapid binding kinetics between the thrombin and 6-carboxyfluorescein labeled G-quadruplex aptamer was measured...
June 8, 2017: Journal of Separation Science
https://www.readbyqxmd.com/read/28592812/activity-independent-targeting-of-mtor-to-lysosomes-in-primary-osteoclasts
#6
Andrew Wang, Luciene R Carraro-Lacroix, Celeste Owen, Bowen Gao, Paul N Corey, Pascal Tyrrell, John H Brumell, Irina Voronov
Mammalian target of rapamycin (mTOR) is activated by numerous stimuli, including amino acids and growth factors. This kinase is part of the mTOR complex 1 (mTORC1) which regulates cell proliferation, differentiation, and autophagy. Active mTORC1 is located on lysosomes and has been reported to disassociate from the lysosomal surface in the absence of amino acids. Furthermore, mTORC1 activity has been linked to the vacuolar H(+)-ATPases (V-ATPases), the proton pumps responsible for lysosomal acidification; however, the exact role of the V-ATPases in mTORC1 signaling is not known...
June 7, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28572446/histone-deacetylase-1-activates-pu-1-gene-transcription-through-regulating-taf9-deacetylation-and-transcription-factor-iid-assembly
#7
Wei Jian, Bowen Yan, Suming Huang, Yi Qiu
Histone acetyltransferases and histone deacetylases (HDACs) are important epigenetic coregulators. It has been thought that HDACs associate with corepressor complexes and repress gene transcription; however, in this study, we have found that PU.1-a key master regulator for hematopoietic self-renewal and lineage specification-requires HDAC activity for gene activation. Deregulated PU.1 gene expression is linked to dysregulated hematopoiesis and the development of leukemia. In this study, we used erythroid differentiation as a model to analyze how the PU...
June 1, 2017: FASEB Journal: Official Publication of the Federation of American Societies for Experimental Biology
https://www.readbyqxmd.com/read/28559013/establishment-and-genomic-characterization-of-primary-salivary-duct-carcinoma-cell-line
#8
Jie Li, Yohitsugu Mitani, Pulivarthi H Rao, Laszlo Perlaky, Bin Liu, Randal S Weber, Adel K El-Naggar
OBJECTIVES: To develop and characterize in vitro salivary duct carcinoma as a surrogate for functional studies. MATERIALS AND METHODS: Cells were dispersed from tumor tissue fragments under sterile conditions in RPMI media. Disassociated cells were cultivated, immortalized with hTERT and propagated for more than 100 passages. Morphologic, linage, cytogenetic and genomic analyses were performed on different passages of cell line and primary tumor. Soft agar growth was performed...
June 2017: Oral Oncology
https://www.readbyqxmd.com/read/28557973/cerebrospinal-fluid-dissemination-and-neoplastic-meningitis-in-primary-brain-tumors
#9
Sajeel Chowdhary, Sherri Damlo, Marc C Chamberlain
BACKGROUND: Neoplastic meningitis, also known as leptomeningeal disease, affects the entire neuraxis. The clinical manifestations of the disease may affect the cranial nerves, cerebral hemispheres, or the spine. Because of the extent of disease involvement, treatment options and disease staging should involve all compartments of the cerebrospinal fluid (CSF) and subarachnoid space. Few studies of patients with primary brain tumors have specifically addressed treatment for the secondary complication of neoplastic meningitis...
January 2017: Cancer Control: Journal of the Moffitt Cancer Center
https://www.readbyqxmd.com/read/28550044/t-cells-lacking-hdac11-have-increased-effector-functions-and-mediate-enhanced-alloreactivity-in-a-murine-model
#10
David M Woods, Karrune V Woan, Fengdong Cheng, Andressa L Sodré, Dapeng Wang, Yongxia Wu, Zi Wang, Jie Chen, John Powers, Javier Pinilla-Ibarz, Yu Yu, Ya Zhang, Xuefeng Wu, Xiaoyan Zheng, Jeffrey Weber, Wayne Hancock, Edward Seto, Alejandro Villagra, Xue-Zhong Yu, Eduardo M Sotomayor
Histone acetylation and the families of enzymes responsible for controlling these epigenetic marks have been implicated in regulating T-cell maturation and phenotype. Here, we demonstrate a previously undefined role of histone deacetylase 11 (HDAC11) in regulating T-cell effector functions. Using EGFP-HDAC11 transgenic reporter mice, we found that HDAC11 expression was lower in effector relative to naïve and central memory T-cell populations, and activation of resting T-cells resulted in its decreased expression...
May 26, 2017: Blood
https://www.readbyqxmd.com/read/28550013/an-essential-regulatory-system-originating-from-polygenic-transcriptional-rewiring-of-phop-phoq-of-xanthomonas-campestris
#11
Bao-Yu Peng, Yue Pan, Ru-Jiao Li, Jin-Wei Wei, Fang Liang, Li Wang, Fang-Fang Wang, Wei Qian
How essential, regulatory genes originate and evolve is intriguing because mutations of these genes not only lead to lethality in organisms, but also have pleiotropic effects since they control the expression of multiple downstream genes. Therefore, the evolution of essential, regulatory genes is not only determined by genetic variations of their own sequences, but also by the biological function of downstream genes and molecular mechanisms of regulation. To understand the origin of essential, regulatory genes, experimental dissection of the complete regulatory cascade is needed...
May 26, 2017: Genetics
https://www.readbyqxmd.com/read/28539822/induction-of-mitotic-delay-in-pharyngeal-and-nasopharyngeal-carcinoma-cells-using-an-aqueous-extract-of-ajuga-bracteosa
#12
Yu-Tsai Lin, Chih-Che Lin, Hung-Chen Wang, Yi-Chiang Hsu
Nasopharyngeal carcinoma (NPC) is a common cancer in Southeast Asia, for which radiotherapy and/or chemotherapy are the primary treatment methods. Many herbs are known to have potential uses in chemotherapy; however, the mechanisms underlying the observed antitumor activity of Ajuga bracteosa (AB) against NPC remain unclear. We explored the antitumor effects of AB, which was shown specifically to induce mitotic delay in pharyngeal (Detroit 562) and nasopharyngeal (Hone-1) cancer cells. Proliferation of cancer cells after exposure to aqueous extract of A...
2017: International Journal of Medical Sciences
https://www.readbyqxmd.com/read/28475927/a-novel-typing-method-for-listeria-monocytogenes-using-high-resolution-melting-analysis-hrma-of-tandem-repeat-regions
#13
Chihiro Ohshima, Hajime Takahashi, Ai Iwakawa, Takashi Kuda, Bon Kimura
Listeria monocytogenes, which is responsible for causing food poisoning known as listeriosis, infects humans and animals. Widely distributed in the environment, this bacterium is known to contaminate food products after being transmitted to factories via raw materials. To minimize the contamination of products by food pathogens, it is critical to identify and eliminate factory entry routes and pathways for the causative bacteria. High resolution melting analysis (HRMA) is a method that takes advantage of differences in DNA sequences and PCR product lengths that are reflected by the disassociation temperature...
April 25, 2017: International Journal of Food Microbiology
https://www.readbyqxmd.com/read/28472431/what-supervisors-and-universities-can-do-to-enhance-doctoral-student-experience-and-how-they-can-help-themselves
#14
Dawn C Duke, Pam M Denicolo
Over the past two decades, there has been a flurry of government papers and policy reports worldwide calling for increased number and diversity of doctoral researchers and a broadening of the curriculum to meet the developing needs of respective national 'knowledge-driven' economies. This has been followed by position papers and best practice examples of employability skills development in boundary-crossing doctoral programmes, especially in response to these initiatives. However, there is a disassociation between this ample literature expounding the new doctorate with its broader remit, inclusivity and production of 'industry-ready' graduates and the comparatively sparse literature on the doctoral candidates' experiences of their programmes and career readiness...
May 1, 2017: FEMS Microbiology Letters
https://www.readbyqxmd.com/read/28465558/enhanced-photoelectrochemical-activities-for-water-oxidation-and-phenol-degradation-on-wo3-nanoplates-by-transferring-electrons-and-trapping-holes
#15
Liqun Sun, Yuying Wang, Fazal Raziq, Yang Qu, Linlu Bai, Liqiang Jing
It is highly desired to improve the photoelectrochemical (PEC) performance of nanosized WO3 by artificially modulating the photogenerated electrons and holes simultaneously. Herein, WO3 nanoplates have been successfully prepared by a simple one-pot two-phase separated hydrolysis-solvothermal method, and then co-modified with RGO and phosphate acid successively by wet chemical processes. Subsequently, the as-prepared WO3-based nanoplates were immobilized on the conductive glasses to explore the PEC activities for both water oxidation to evolve O2 and phenol degradation...
May 2, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28452987/variability-and-host-density-independence-in-inductions-based-estimates-of-environmental-lysogeny
#16
Ben Knowles, Barbara Bailey, Lance Boling, Mya Breitbart, Ana Cobián-Güemes, Javier Del Campo, Rob Edwards, Ben Felts, Juris Grasis, Andreas F Haas, Parag Katira, Linda Wegley Kelly, Antoni Luque, Jim Nulton, Lauren Paul, Gregory Peters, Nate Robinett, Stuart Sandin, Anca Segall, Cynthia Silveira, Merry Youle, Forest Rohwer
Temperate bacterial viruses (phages) may enter a symbiosis with their host cell, forming a unit called a lysogen. Infection and viral replication are disassociated in lysogens until an induction event such as DNA damage occurs, triggering viral-mediated lysis. The lysogen-lytic viral reproduction switch is central to viral ecology, with diverse ecosystem impacts. It has been argued that lysogeny is favoured in phages at low host densities. This paradigm is based on the fraction of chemically inducible cells (FCIC) lysogeny proxy determined using DNA-damaging mitomycin C inductions...
April 28, 2017: Nature Microbiology
https://www.readbyqxmd.com/read/28438535/a-critical-view-on-in-vitro-analysis-of-p-glycoprotein-p-gp-transport-kinetics
#17
Lasse Saaby, Birger Brodin
Transport proteins expressed in the different barriers of the human body can have great implications on absorption, distribution and excretion of drug compounds. Inhibition or saturation of a transporter can potentially alter these ADME properties, and thereby also the pharmacokinetic profile and bioavailability of drug compounds. P-glycoprotein (P-gp, ABCB1), is an efflux transporter which is present in most of the barriers of the body, including the small intestine, the blood-brain barrier, the liver and the kidney...
April 21, 2017: Journal of Pharmaceutical Sciences
https://www.readbyqxmd.com/read/28412935/fitness-costs-of-symbiont-switching-using-entomopathogenic-nematodes-as-a-model
#18
John G McMullen, Brittany F Peterson, Steven Forst, Heidi Goodrich Blair, S Patricia Stock
BACKGROUND: Steinernematid nematodes form obligate symbioses with bacteria from the genus Xenorhabdus. Together Steinernema nematodes and their bacterial symbionts successfully infect, kill, utilize, and exit their insect hosts. During this process the nematodes and bacteria disassociate requiring them to re-associate before emerging from the host. This interaction can be complicated when two different nematodes co-infect an insect host. RESULTS: Non-cognate nematode-bacteria pairings result in reductions for multiple measures of success, including total progeny production and virulence...
April 17, 2017: BMC Evolutionary Biology
https://www.readbyqxmd.com/read/28412929/testosterone-territorial-response-and-song-in-seasonally-breeding-tropical-and-temperate-stonechats
#19
COMPARATIVE STUDY
Beate Apfelbeck, Kim G Mortega, Heiner Flinks, Juan Carlos Illera, Barbara Helm
BACKGROUND: Testosterone facilitates physiological, morphological, and behavioral changes required for breeding in male vertebrates. However, testosterone concentrations and the link between its seasonal changes and those in reproductive behaviors vary greatly among species. To better understand the impact of tropical and temperate environments and life history factors on this variation, we have compared testosterone, territorial behavior and song performance across sequential stages of the breeding season in males of 16 closely related taxa of East African tropical and West European temperate stonechats (Saxicola spp), which all breed during a short breeding season, but differ in migratory behavior, seasonal territory-acquisition and pace of life...
April 17, 2017: BMC Evolutionary Biology
https://www.readbyqxmd.com/read/28404816/the-pick1-ca-2-sensor-modulates-n-methyl-d-aspartate-nmda-receptor-dependent-microrna-mediated-translational-repression-in-neurons
#20
Dipen Rajgor, Maria Fiuza, Gabrielle T Parkinson, Jonathan G Hanley
MicroRNAs (miRNAs) are important regulators of localized mRNA translation in neuronal dendrites. The presence of RNA-induced silencing complex proteins in these compartments and the dynamic miRNA expression changes that occur in response to neuronal stimulation highlight their importance in synaptic plasticity. Previously, we demonstrated a novel interaction between the major RNA-induced silencing complex component Argounaute-2 (Ago2) and the BAR (bin/amphiphysin/rvs) domain protein PICK1. PICK1 recruits Ago2 to recycling endosomes in dendrites, where it inhibits miRNA-mediated translational repression...
June 9, 2017: Journal of Biological Chemistry
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