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https://www.readbyqxmd.com/read/27906510/thermohydrogel-containing-melanin-for-photothermal-cancer-therapy
#1
Miri Kim, Hyun Soo Kim, Min Ah Kim, Hyanghwa Ryu, Hwan-Jeong Jeong, Chang-Moon Lee
Melanin is an effective absorber of light and can extend to near infrared (NIR) regions. In this study, a natural melanin is presented as a photothermal therapeutic agent (PTA) because it provides a good photothermal conversion efficiency, shows biodegradability, and does not induce long-term toxicity during retention in vivo. Poloxamer solution containing melanin (Pol-Mel) does not show any precipitation and shows sol-gel transition at body temperature. After irradiation from 808 nm NIR laser at 1.5 W cm(-2) for 3 min, the photothermal conversion efficiency of Pol-Mel is enough to kill cancer cells in vitro and in vivo...
December 1, 2016: Macromolecular Bioscience
https://www.readbyqxmd.com/read/27906212/influence-of-co-sub-2-sub-pressure-on-the-emission-spectra-and-plasma-parameters-in-underwater-laser-induced-breakdown-spectroscopy
#2
Christian L Goueguel, Dustin L McIntyre, Jinesh C Jain
Optical emission spectroscopic studies have been carried out to investigate the pressure effect of CO<sub>2</sub> on laser-produced underwater plasma. The plasma was generated by focusing 1064 nm, 6 ns pulses from a Nd:YAG laser in a CO<sub>2</sub>-bearing solution. The temporal evolution of the continuum emission, Sr and Ba lines, and plasma electron density and temperature was characterized under CO<sub>2</sub> pressure ranging from 10 to 300 bars. The electron density measurements were made using the Stark broadening of the 455...
December 1, 2016: Optics Letters
https://www.readbyqxmd.com/read/27906161/structural-basis-for-arfa-rf2-mediated-translation-termination-on-mrnas-lacking-stop-codons
#3
Paul Huter, Claudia Müller, Bertrand Beckert, Stefan Arenz, Otto Berninghausen, Roland Beckmann, Daniel N Wilson
In bacteria, ribosomes stalled on truncated mRNAs lacking a stop codon are rescued by either the transfer-messenger RNA (tmRNA), alternative rescue factor A (ArfA) or ArfB rescue systems(1). While tmRNA- and ArfB-ribosome structures have been elucidated(2-7), structural insight into how ArfA recognizes the presence of truncated mRNAs and recruits the canonical termination release factor RF2 to rescue the stalled ribosomes is lacking. Here we present a cryo-electron microscopy reconstruction of a ribosome stalled on a truncated mRNA in the presence of ArfA and RF2...
December 1, 2016: Nature
https://www.readbyqxmd.com/read/27906144/positive-regulation-of-biochemical-parameters-by-tea-polyphenol-encapsulated-solid-lipid-nanoparticles-at-in-vitro-and-in-vivo-conditions
#4
Karikalan Kulandaivelu, Abul Kalam Azad Mandal
Tea polyphenols (TPPs) comprise preventive and therapeutic potentials against cancer, cardiovascular and neurological disorders. Chemical instability of TPP which leads to low bioavailability is the major constrain to its use as therapeutic agent. The authors prepared TPP encapsulated solid lipid nanoparticles (TPP-SLNs) to increase its stability and bioefficacy. Comparison of Fourier transformed infrared spectra of unloaded SLN, free TPP and TPP-SLN indicated encapsulation of TPP. Sustained release of TPP from TP-SLN was observed...
December 2016: IET Nanobiotechnology
https://www.readbyqxmd.com/read/27906137/in-vitro-toxicity-of-carbon-nanotube-polylysine-colloids-to-colon-cancer-cells
#5
Alejandro Ansón-Casaos, Laura Grasa, Desirée Pereboom, José Emilio Mesonero, Alvaro Casanova, María Divina Murillo, María Teresa Martínez
Single-walled carbon nanotubes (SWCNTs) are thoroughly purified and dispersed in an aqueous solution of high molecular weight poly-L-lysine (pLlys). Human intestinal epithelial Caco-2/TC7 cells are incubated with the SWCNT dispersions in pLlys, and their effects on cell viability are studied by image flow cytometry. No significant changes are observed in the cell culture wells up to pLlys concentrations of 10 μg ml(-1). However, high mortality is detected at pLlys concentrations of 100 μg ml(-1). The presence of oxygen-free SWCNTs does not modify the effects of pLlys on cell cultures at any of the tested concentrations (≤1 μg ml(-1))...
December 2016: IET Nanobiotechnology
https://www.readbyqxmd.com/read/27906072/actrii-blockade-protects-mice-from-cancer-cachexia-and-prolongs-survival-in-the-presence-of-anti-cancer-treatments
#6
Shinji Hatakeyama, Serge Summermatter, Marie Jourdain, Stefan Melly, Giulia C Minetti, Estelle Lach-Trifilieff
BACKGROUND: Cachexia affects the majority of patients with advanced cancer and is associated with reduced treatment tolerance, response to therapy, quality of life, and life expectancy. Cachectic patients with advanced cancer often receive anti-cancer therapies against their specific cancer type as a standard of care, and whether specific ActRII inhibition is efficacious when combined with anti-cancer agents has not been elucidated yet. METHODS: In this study, we evaluated interactions between ActRII blockade and anti-cancer agents in CT-26 mouse colon cancer-induced cachexia model...
July 26, 2016: Skeletal Muscle
https://www.readbyqxmd.com/read/27905925/expression-of-insulin-receptor-ir-a-and-b-isoforms-igf-ir-and-ir-igf-ir-hybrid-receptors-in-vascular-smooth-muscle-cells-and-their-role-in-cell-migration-in-atherosclerosis
#7
N Beneit, C E Fernández-García, J L Martín-Ventura, L Perdomo, Ó Escribano, J B Michel, G García-Gómez, S Fernández, S Díaz-Castroverde, J Egido, A Gómez-Hernández, M Benito
BACKGROUND: Abnormal proliferation and migration of vascular smooth muscle cells (VSMCs) is a major contributor to the development of atherosclerotic process. In a previous work, we demonstrated that the insulin receptor isoform A (IRA) and its association with the insulin-like growth factor-I receptor (IGF-IR) confer a proliferative advantage to VSMCs. However, the role of IR and IGF-IR in VSMC migration remains poorly understood. METHODS: Wound healing assays were performed in VSMCs bearing IR (IRLoxP(+/+) VSMCs), or not (IR(-/-) VSMCs), expressing IRA (IRA VSMCs) or expressing IRB (IRB VSMCs)...
December 1, 2016: Cardiovascular Diabetology
https://www.readbyqxmd.com/read/27905191/race-and-ethnicity-and-preconception-folic-acid-supplement-use-among-pregnant-women-in-georgia-prams-2009-to-2011
#8
Ayesha Mukhtar, Michael R Kramer, Godfrey P Oakley, Vijaya Kancherla
BACKGROUND: The United States Public Health Service recommends that all women of reproductive age consume 400 μg of folic acid daily to prevent major neural tube defects. Hispanics have the highest prevalence of neural tube defects compared with other race/ethnic groups. We studied prevalence of preconception folic acid supplement use, and its association with race/ethnicity among pregnant women in Georgia. METHODS: Using state-wide population-based data from 2009 to 2011 Georgia Pregnancy Risk Assessment Monitoring System, we examined the prevalence of preconception folic acid supplement use among pregnant women aged 18 to 45 years...
December 1, 2016: Birth Defects Research. Part A, Clinical and Molecular Teratology
https://www.readbyqxmd.com/read/27904223/talocalcaneal-coalition-a-focus-on-radiographic-findings-and-sites-of-bridging
#9
Soon Hyuck Lee, Hyung Jun Park, Eui Dong Yeo, Young Koo Lee
BACKGROUND: Verifying the exact location of talocalcaneal (TC) coalition is important for surgery, but the complicated anatomy of the subtalar joint makes it difficult to visualize on radiographs. No study has used computed tomography (CT) or magnetic resonance imaging (MRI) to verify the radiological characteristics of TC coalition or those of different facet coalitions. Therefore, this study verified the radiological findings used to identify TC coalitions and those of different facet coalitions using CT and MRI...
November 2016: Indian Journal of Orthopaedics
https://www.readbyqxmd.com/read/27904221/what-have-we-learned-from-100-success-of-press-fit-condylar-rotating-platform-posterior-stabilized-knees-a-5-10-years-followup-by-a-nondesigner
#10
Shrinand V Vaidya, Siddharth Virani, Rajendra Phunde, Abhishek Mahajan
BACKGROUND: Total joint arthroplasties of the hip and knee represent a remarkable feat of modern medicine in terms of reducing pain and restoring function to millions of patients afflicted with severe arthritis. Oftentimes, the performance and longevity of new implants and devices are based on limited data. This is the first study by a non-designer on the press fit condylar rotating platform posterior stabilized (PFC-RP-PS) design with 100' success. This has a relevance, vis-á -vis bias that one may have in terms of reproducibility of technique and funding from the manufacturer...
November 2016: Indian Journal of Orthopaedics
https://www.readbyqxmd.com/read/27904219/results-of-a-compression-pin-alongwith-trochanteric-external-fixation-in-management-of-high-risk-elderly-intertrochanteric-fractures
#11
Aydın Arslan, Ali Utkan, Tuba Tulay Koca
BACKGROUND: External fixation is a well-known procedure for the management of intertrochanteric fractures in very elderly high-risk patients. A new compression pin that can be adapted to all fixators was designed to provide inter fragmentary compression. In the present study, its effects on the fracture stability and healing were evaluated. MATERIALS AND METHODS: Thirty-one patients treated using compression pin and thirty-six patients treated using standard pins were evaluated retrospectively between January 2009 and July 2014...
November 2016: Indian Journal of Orthopaedics
https://www.readbyqxmd.com/read/27904180/evaluation-of-clinical-significance-of-dermoscopy-in-alopecia-areata
#12
Akhila Sai Guttikonda, Chintaginjala Aruna, D V S B Ramamurthy, K Sridevi, Senthil Kumar L Alagappan
BACKGROUND: Alopecia areata (AA) is a common, chronic inflammatory disease characterized by nonscarring hair loss on the scalp or any hair-bearing area of the body. Recently, dermoscopy, a noninvasive diagnostic procedure, has been employed for the diagnosis of AA. AIM: To evaluate various dermoscopic patterns in AA and correlate these patterns with the disease activity and severity. MATERIALS AND METHODS: Dermoscopy was performed on AA patients using DL1 dermoscope (magnification ×10 was used)...
November 2016: Indian Journal of Dermatology
https://www.readbyqxmd.com/read/27903977/dioscin-augments-hsv-tk-mediated-suicide-gene-therapy-for-melanoma-by-promoting-connexin-based-intercellular-communication
#13
Jianyong Xiao, Guangxian Zhang, Bin Li, Yingya Wu, Xijuan Liu, Yuhui Tan, Biaoyan Du
Suicide gene therapy is a promising strategy against melanoma. However, the low efficiency of the gene transfer technique can limit its application. Our preliminary data showed that dioscin, a glucoside saponin, could upregulate the expression of connexins Cx26 and Cx43, major components of gap junctions, in melanoma cells. We hypothesized that dioscin may increase the bystander effect of herpes simplex virus thymidine kinase/ganciclovir (HSV-tk/GCV) through increasing the formation of gap junctions. Further analysis showed that dioscin indeed could increase the gap junctional intercellular communication in B16 melanoma cells, resulting in more efficient GCV-induced bystander killing in B16tk cells...
November 26, 2016: Oncotarget
https://www.readbyqxmd.com/read/27903956/global-burden-of-all-cause-and-cause-specific-mortality-due-to-smokeless-tobacco-use-systematic-review-and-meta-analysis
#14
Dhirendra N Sinha, Rizwan A Suliankatchi, Prakash C Gupta, Thaksaphon Thamarangsi, Naveen Agarwal, Mark Parascandola, Ravi Mehrotra
OBJECTIVES: To systematically review and meta-analyse the studies investigating the association between smokeless tobacco (SLT) use and all-cause mortality and cause-specific mortality outcomes among adult users of SLT and estimate the number of attributable deaths worldwide. METHODS: Random-effects meta-analysis was used to estimate the pooled risk of death due to SLT use. Population attributable fractions were derived and used to calculate the number of attributable deaths...
November 30, 2016: Tobacco Control
https://www.readbyqxmd.com/read/27903871/decline-and-recovery-of-a-large-carnivore-environmental-change-and-long-term-trends-in-an-endangered-brown-bear-population
#15
Isabel Martínez Cano, Fernando González Taboada, Javier Naves, Alberto Fernández-Gil, Thorsten Wiegand
Understanding what factors drive fluctuations in the abundance of endangered species is a difficult ecological problem but a major requirement to attain effective management and conservation success. The ecological traits of large mammals make this task even more complicated, calling for integrative approaches. We develop a framework combining individual-based modelling and statistical inference to assess alternative hypotheses on brown bear dynamics in the Cantabrian range (Iberian Peninsula). Models including the effect of environmental factors on mortality rates were able to reproduce three decades of variation in the number of females with cubs of the year (Fcoy), including the decline that put the population close to extinction in the mid-nineties, and the following increase in brown bear numbers...
November 30, 2016: Proceedings. Biological Sciences
https://www.readbyqxmd.com/read/27903868/allee-effect-in-polar-bears-a-potential-consequence-of-polychlorinated-biphenyl-contamination
#16
Viola Pavlova, Jacob Nabe-Nielsen, Rune Dietz, Christian Sonne, Volker Grimm
Polar bears (Ursus maritimus) from East Greenland and Svalbard exhibited very high concentrations of polychlorinated biphenyls (PCBs) in the 1980s and 1990s. In Svalbard, slow population growth during that period was suspected to be linked to PCB contamination. In this case study, we explored how PCBs could have impacted polar bear population growth and/or male reproductive success in Svalbard during the mid-1990s by reducing the fertility of contaminated males. A dose-response relationship linking the effects of PCBs to male polar bear fertility was extrapolated from studies of the effects of PCBs on sperm quality in rodents...
November 30, 2016: Proceedings. Biological Sciences
https://www.readbyqxmd.com/read/27903837/the-effect-of-army-vest-design-on-the-occurrence-of-stress-fractures-and-overuse-injuries-in-female-military-recruits
#17
Ezequiel Palmanovich, M Frankl, M Nyska, I Hetsroni, N Constantini, L Trejo, R Bechar, G Novak, Z Lankovsky, G Mann
INTRODUCTION: Stress fractures (SFs) occur when microdamage caused by repetitive mechanical load exceeds the biological load-bearing capacity of the bone. The study objective was to test whether a vest specifically designed and manufactured for female recruits, compared with the standard vest used on a regular basis by Border Police recruits, would reduce the incidence of SF in female Border Police recruits. Data based on reports of military personnel show that women are more likely to sustain SFs...
November 30, 2016: Journal of the Royal Army Medical Corps
https://www.readbyqxmd.com/read/27903717/deciphering-decision-making-variation-in-animal-models-of-effort-and-uncertainty-based-choice-reveals-distinct-neural-circuitries-underlying-core-cognitive-processes
#18
Catharine A Winstanley, Stan B Floresco
Maladaptive decision-making is increasingly recognized to play a significant role in numerous psychiatric disorders, such that therapeutics capable of ameliorating core impairments in judgment may be beneficial in a range of patient populations. The field of "decision neuroscience" is therefore in its ascendancy, with researchers from diverse fields bringing their expertise to bear on this complex and fascinating problem. In addition to the advances in neuroimaging and computational neuroscience that contribute enormously to this area, an increase in the complexity and sophistication of behavioral paradigms designed for nonhuman laboratory animals has also had a significant impact on researchers' ability to test the causal nature of hypotheses pertaining to the neural circuitry underlying the choice process...
November 30, 2016: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/27903678/adnp-is-a-therapeutically-inducible-repressor-of-wnt-signaling-in-colorectal-cancer
#19
Cristina Blaj, Agnes Bringmann, Eva Marina Schmidt, Manuela Urbischek, Sebastian Lamprecht, Thomas Fröhlich, Georg J Arnold, Stefan Krebs, Helmut Blum, Heiko Hermeking, Andreas Jung, Thomas Kirchner, David Horst
PURPOSE: Constitutively active WNT signaling is hallmark of colorectal cancers and driver of malignant tumor progression. Therapeutic targeting of WNT signaling is difficult due to high pathway complexity and its role in tissue homeostasis. Here we identify the transcription factor ADNP as a pharmacologically inducible repressor of WNT signaling in colon cancer. EXPERIMENTAL DESIGN: We used transcriptomic, proteomic, and in situ analyses to identify ADNP expression in colorectal cancer, and cell biology approaches to determine its function...
November 30, 2016: Clinical Cancer Research: An Official Journal of the American Association for Cancer Research
https://www.readbyqxmd.com/read/27903677/combined-inhibition-of-both-p110%C3%AE-and-p110%C3%AE-isoforms-of-phosphatidylinositol-3-kinase-is-required-for-sustained-therapeutic-effect-in-pten-deficient-er-breast-cancer
#20
Sarah R Hosford, Lloye M Dillon, Stephanie J Bouley, Rachele Rosati, Wei Yang, Vivian S Chen, Eugene Demidenko, Rocco P Morra, Todd W Miller
PURPOSE: Determine the roles of the phosphatidylinositol 3-kinase (PI3K) isoforms p110α and p110β in PTEN-deficient, estrogen receptor α (ER)-positive breast cancer, and the therapeutic potential of isoform-selective inhibitors. EXPERIMENTAL DESIGN: Anti-estrogen-sensitive and -resistant PTEN-deficient, ER+ human breast cancer cell lines, and mice bearing anti-estrogen-resistant xenografts were treated with the anti-estrogen fulvestrant, the p110α inhibitor BYL719, the p110β inhibitor GSK2636771, or combinations...
November 30, 2016: Clinical Cancer Research: An Official Journal of the American Association for Cancer Research
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