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Claudia Bozzaro
Physician-assisted dying (assisted suicide and euthanasia) is currently an intensely discussed topic in several countries. Despite differences in legislation and application, countries with end-of-life laws have similar eligibility criteria for assistance in dying: individuals must be in a hopeless situation and experience unbearable suffering. Hopelessness, as a basic aspect of the human condition, is a central topic in Albert Camus' philosophical work The Myth of Sisyphus, which addresses the question of suicide...
March 20, 2018: Theoretical Medicine and Bioethics
Daniel O Scharfstein, Aidan McDermott
Randomized trials with patient-reported outcomes are commonly plagued by missing data. The analysis of such trials relies on untestable assumptions about the missing data mechanism. To address this issue, it has been recommended that the sensitivity of the trial results to assumptions should be a mandatory reporting requirement. In this paper, we discuss a recently developed methodology (Scharfstein et al., Biometrics, 2018) for conducting sensitivity analysis of randomized trials in which outcomes are scheduled to be measured at fixed points in time after randomization and some subjects prematurely withdraw from study participation...
January 1, 2018: Statistical Methods in Medical Research
Jeremy T Ritzert, Wyndham W Lathem
Bacterial pathogenesis depends on changes in metabolic and virulence gene expression in response to changes within a pathogen's environment. The plague-causing pathogen, Yersinia pestis, requires expression of the gene encoding the Pla protease for progression of pneumonic plague. The catabolite repressor protein Crp, a global transcriptional regulator, may serve as the activator of pla in response to changes within the lungs as disease progresses. By using gene reporter fusions, the spatial and temporal activation of the crp and pla promoters was measured in a mouse model of pneumonic plague...
March 19, 2018: Journal of Bacteriology
Ricci P H Yue, Harry F Lee
BACKGROUND: Although the linkage between climate change and plague transmission has been proposed in previous studies, the dominant approach has been to address the linkage with traditional statistical methods, while the possible non-linearity, non-stationarity and low frequency domain of the linkage has not been fully considered. We seek to address the above issue by investigating plague transmission in pre-industrial Europe (AD1347-1760) at both continental and country levels. METHODS: We apply Granger Causality Analysis to identify the casual relationship between climatic variables and plague outbreaks...
March 20, 2018: BMC Infectious Diseases
Camillo Lamanna
Narrative medicine explores the stories that patients tell; this paper, conversely, looks at some of the stories that patients are told. The paper starts by examining the 'story' told by the Shambaa people of Tanzania to explain the bubonic plague and contrasts this with the stories told by Ghanaian communities to explain lymphatic filariasis. By harnessing insights from memory studies, these stories' memorability is claimed to be due to their use mnemonic devices woven into stories. The paper suggests that stories can be unpatronising, informative, and appropriate vehicles for communicating medical information to all age groups across all cultures...
March 19, 2018: Journal of Medical Humanities
Charlotte Handberg, Sally Thorne, Thomas Maribo
PURPOSE: To analyze and describe health professionals' attitudes and perspectives on the complexities of cancer survivorship and rehabilitation needs assessment in a shared cancer care context. METHOD: The design and methodology for this study was Interpretive Description and the analysis was informed by Symbolic Interactionism as the theoretical framework. Between April and December 2015 an ethnographic fieldwork was carried out by the first author in haematological wards at two Danish hospitals and in two primary care settings conducting cancer survivorship care programs...
April 2018: European Journal of Oncology Nursing: the Official Journal of European Oncology Nursing Society
Hong Truong, Leonard G Gomella, Mathew L Thakur, Edouard J Trabulsi
PURPOSE: Current approaches to prostate cancer screening and diagnosis are plagued with limitations in diagnostic accuracy. There is a compelling need for biomolecular imaging that will not only detect prostate cancer early but also distinguish prostate cancer from benign lesions accurately. In this topic paper, we review evidence that supports further investigation of VPAC1-targeted PET/CT imaging in the primary diagnosis of prostate cancer. METHODS: A non-systematic review of Medline/PubMed was performed...
March 14, 2018: World Journal of Urology
Zhou Xiao-Nong, Li Shi-Zhu, Hong Qing-Biao, Yang Kun, Lü Shan, Xu Jing
This paper reviews the huge promotion of Chairman Mao Zedong's two poems entitled "Farewell to the God of Plague" which were published 60 years ago, and the great achievements of the national schistosomiasis control programme in China. The publication of the two poems promotes the establishment of the mechanism for the national schistosomiasis control programme in China, and in addition, the schistosomiasis control spirit of the people from Yujiang County is still the source of power for the promotion of transferring the schistosomiasis control to elimination stage in China...
February 26, 2018: Zhongguo Xue Xi Chong Bing Fang Zhi za Zhi, Chinese Journal of Schistosomiasis Control
Richard Njouom, Isabelle Siffert, Gaëtan Texier, Guillaume Lachenal, Mathurin Cyrille Tejiokem, Jacques Pépin, Arnaud Fontanet
Cameroon is thought to have one of the highest prevalences of Hepatitis C virus (HCV) infection in the world (4·9% among adults). A marked cohort effect exists in several communities where ≈50% of the elderly are infected. Better assessment of HCV distribution is needed for planning treatment programs. We tested for HCV antibodies 14150 capillary blood samples collected during the 2011 Demographic and Health Survey, whose participants were representative of the Cameroonian population aged 15-49 (both genders) and 50-59 years (men only)...
March 13, 2018: Journal of Viral Hepatitis
Joseph Michael Dennis, Nicholas A White, Richard Y Liu, Stephen L Buchwald
Due to the low intrinsic acidity of amines, palladium-catalyzed C-N cross-coupling has been plagued continuously by the necessity to employ strong, inorganic, and/or insoluble bases. To surmount the many practical obstacles associated with these reagents, we utilized a commercially available, dialkyl triarylmonophosphine-supported palladium catalyst that facilitates a broad range of C-N coupling reactions in the presence of weak, soluble bases. The mild and general reaction conditions show extraordinary tolerance for even highly base-sensitive functional groups...
March 12, 2018: Journal of the American Chemical Society
Lin Chen, Zhancheng Gao
BACKGROUND: A high incidence and mortality of plague in the past two decades occurred in the Qinghai-Tibet Plateau, China. High dose streptomycin (6-8 g/d) remained the first practical strategy for controlling the progressive, vicious clinical circumstances for patients with pneumonic plague in the Plateau, as opposed to the routine dosage recommended by the World Health Organization. To investigate whether patients with pneumonic plague truly required a large dosage of streptomycin in the hypoxic environment of the Tibetan Plateau, we investigated the hypothesis that hypoxic environment would change the pharmacokinetics of streptomycin in vivo...
March 9, 2018: BMC Infectious Diseases
Hualiang Lv, Zhihong Yang, Paul Luyuan Wang, Guangbin Ji, Jizhong Song, Lirong Zheng, Haibo Zeng, Zhichuan J Xu
Nowadays, low-frequency electromagnetic interference (<2.0 GHz) remains a key core issue that plagues the effective attenuation performance of conventional absorption devices prepared via the component-morphology method (Strategy I). According to theoretical calculations, one fundamental solution is to develop a material that possesses a high ε' but lower ε″. Thus, it is attempted to control the dielectric values via applying an external electrical field, which inducts changes in the macrostructure toward a performance improvement (Strategy II)...
March 7, 2018: Advanced Materials
Yu You, Tian Liu, Mingshu Wang, Anchun Cheng, Renyong Jia, Qiao Yang, Ying Wu, Dekang Zhu, Shun Chen, Mafeng Liu, XinXin Zhao, Shaqiu Zhang, Yunya Liu, Yanling Yu, Ling Zhang
To analyse the function of the duck plague virus (DPV) glycoprotein J homologue (gJ), two different mutated viruses, a gJ deleted mutant ΔgJ and a gJR rescue mutant gJR with US5 restored were generated. All recombinant viruses were constructed by using two-step of RED recombination system implemented on the duck plague virus Chinese virulent strain (DPV CHv) genome cloned into a bacterial artificial chromosome. DPV-mutants were characterized on non-complementing DEF cells compared with parental virus. Viral replication kinetics of intracellular and extracellular viruses revealed that the ΔgJ virus produce a 10-fold reduction of viral titers than the gJR and parental virus, which especially the production of extracellular infectivity was affected...
March 6, 2018: Scientific Reports
Nathaniel H Park, Wei Cheng, Fritz Lai, Chuan Yang, Paola Florez de Sessions, Balamurugan Periaswamy, Collins Wenhan Chu, Simone Bianco, Shaoqiong Liu, Shrinivas Venkataraman, Qingfeng Chen, Yi Yan Yang, James L Hedrick
Drug resistance to chemotherapeutics is a recurrent issue plaguing many cancer treatment regimens. To circumvent resistance issues, we have designed a new class of macromolecules as self-contained chemotherapeutic agents. The macromolecular chemotherapeutic agents readily self-assemble into well-defined nanoparticles and show excellent activity in vitro against multiple cancer cell lines. These cationic polymers function by selectively binding and lysing cancer cell membranes. As a consequence of this mechanism, they exhibit significant potency against drug-resistant cancer cells and cancer stem cells, prevent cancer cell migration, and do not induce resistance onset following multiple treatment passages...
March 5, 2018: Journal of the American Chemical Society
Syed Faaiz Enam, Shumaila Hashmi
Evolutionary Medicine (EM) is a fundamental science exploring why our bodies are plagued with disease and hindered by limitations. EM views the body as an assortment of benefits, mistakes, and compromises molded over millennia. It highlights the role of evolution in numerous diseases encountered in community and family medicine clinics of developing countries. It enables us to ask informed questions and develop novel responses to global health problems. An understanding of the field is thus crucial for budding doctors, but its study is currently limited to a handful of medical schools in high-income countries...
2018: Evolution, Medicine, and Public Health
Mousa Khosravani
Historically, rodents-ectoparasites are responsible for many diseases in human and domestic animal communities because they are well-adapted to the environment and nutritional resources. In addition, ectoparasites can affect the reproductive rates, ecological fitness and the dispersal pattern of their hosts. Data was compiled through all publications relating to ectoparasites fauna from Iranian rodents. Host specificity, rodent-parasites interaction, geographical distribution, ecological trends as well as the medical or veterinary importance of ectoparasites are considered in this review...
March 2018: Journal of Parasitic Diseases: Official Organ of the Indian Society for Parasitology
Mireille Kamariza, Peyton Shieh, Christopher S Ealand, Julian S Peters, Brian Chu, Frances P Rodriguez-Rivera, Mohammed R Babu Sait, William V Treuren, Neil Martinson, Rainer Kalscheuer, Bavesh D Kana, Carolyn R Bertozzi
Tuberculosis (TB) is the leading cause of death from an infectious bacterial disease. Poor diagnostic tools to detect active disease plague TB control programs and affect patient care. Accurate detection of live Mycobacterium tuberculosis (Mtb), the causative agent of TB, could improve TB diagnosis and patient treatment. We report that mycobacteria and other corynebacteria can be specifically detected with a fluorogenic trehalose analog. We designed a 4- N,N -dimethylamino-1,8-naphthalimide-conjugated trehalose (DMN-Tre) probe that undergoes >700-fold increase in fluorescence intensity when transitioned from aqueous to hydrophobic environments...
February 28, 2018: Science Translational Medicine
Kaixiang Lei, Chenchen Wang, Luojia Liu, Yuwen Luo, Chaonan Mu, Fujun Li, Jun Chen
Potassium-ion batteries (KIBs) are plagued by materials for reversible accommodation of the large-sized K+. Here, the bulk Bi anode is presented in combination with the dimethoxyethane-(DME) based electrolyte to deliver a remarkable capacity of ~400 mAh g-1 and long cycle stability with three distinct two-phase reactions of Bi↔KBi2↔K3Bi2↔K3Bi. These are ascribed to the gradually developed three-dimensional (3D) porous networks of Bi, which realizes fast kinetics and tolerance of its volume change during potassiation and depotassiation...
February 28, 2018: Angewandte Chemie
Erwan Poivet, Narmin Tahirova, Zita Peterlin, Lu Xu, Dong-Jing Zou, Terry Acree, Stuart Firestein
Crucial for any hypothesis about odor coding is the classification and prediction of sensory qualities in chemical compounds. The relationship between perceptual quality and molecular structure has occupied olfactory scientists throughout the 20th century, but details of the mechanism remain elusive. Odor molecules are typically organic compounds of low molecular weight that may be aliphatic or aromatic, may be saturated or unsaturated, and may have diverse functional polar groups. However, many molecules conforming to these characteristics are odorless...
February 2018: Science Advances
Thomas C Beadnell, Kelsey W Nassar, Madison M Rose, Erin G Clark, Brian P Danysh, Marie-Claude Hofmann, Nikita Pozdeyev, Rebecca E Schweppe
Advanced stages of papillary and anaplastic thyroid cancer continue to be plagued by a dismal prognosis, which is a result of limited effective therapies for these cancers. Due to the high proportion of thyroid cancers harboring mutations in the MAPK pathway, the MAPK pathway has become a focal point for therapeutic intervention in thyroid cancer. Unfortunately, unlike melanoma, a similar responsiveness to MAPK pathway inhibition has yet to be observed in thyroid cancer patients. To address this issue, we have focused on targeting the non-receptor tyrosine kinase, Src, and we and others have demonstrated that targeting Src results in inhibition of growth, invasion, and migration both in vitro and in vivo, which can be enhanced through the combined inhibition of Src and the MAPK pathway...
February 28, 2018: Oncogenesis
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