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https://www.readbyqxmd.com/read/28110461/the-emerging-role-of-liquid-biopsies-circulating-tumor-cells-and-circulating-cell-free-tumor-dna-in-lung-cancer-diagnosis-and-identification-of-resistance-mutations
#1
REVIEW
Angela Esposito, Carmen Criscitiello, Dario Trapani, Giuseppe Curigliano
Therapeutic advances in the treatment of lung cancer are in part due to a more complete understanding of its genomic portrait. The serial monitoring of tumor genotypes, which are instable and prone to changes under selective pressure, is becoming increasingly needed. Although tumor biopsies remain the reference standard for the diagnosis and genotyping of lung cancer, they are invasive and not always feasible. The "liquid biopsies" have the potential to overcome many of these hurdles, allowing a rapid and accurate identification of de novo and resistant genetic alterations and a real-time monitoring of treatment responses...
January 2017: Current Oncology Reports
https://www.readbyqxmd.com/read/28109438/proteomic-analysis-of-metabolic-responses-to-biofuels-and-chemicals-in-photosynthetic-cyanobacteria
#2
T Sun, L Chen, W Zhang
Recent progresses in various "omics" technologies have enabled quantitative measurements of biological molecules in a high-throughput manner. Among them, high-throughput proteomics is a rapidly advancing field that offers a new means to quantify metabolic changes at protein level, which has significantly facilitated our understanding of cellular process, such as protein synthesis, posttranslational modifications, and degradation in responding to environmental perturbations. Cyanobacteria are autotrophic prokaryotes that can perform oxygenic photosynthesis and have recently attracted significant attentions as one promising alternative to traditionally biomass-based "microbial cell factories" to produce green fuels and chemicals...
2017: Methods in Enzymology
https://www.readbyqxmd.com/read/28109021/affordable-orphan-drugs-a-role-for-not-for-profit-organisations
#3
E H Davies, E Fulton, D Brook, D A Hughes
The success of the Regulation on Orphan Medicinal Products in the European Union is evidenced by the 127 orphan drugs that have had market authorisation since 2000. However the incentives aimed to stimulate research and development have had the unintended consequence of increasing drug cost, resulting in many orphan drugs not being cost-effective. Orphan drugs command an increasing share of the pharmaceutical market and account for a disproportionate amount of healthcare expenditure. Orphan drug ownership by socially motivated, not-for-profit organisations may facilitate access to more affordable orphan drugs, for the benefit of patients and healthcare systems alike...
January 20, 2017: British Journal of Clinical Pharmacology
https://www.readbyqxmd.com/read/28104927/a-rapid-systematic-review-and-meta-analysis-of-the-efficacy-of-slaughter-and-processing-interventions-to-control-non-typhoidal-salmonella-in-beef-and-pork
#4
Ian Young, Barbara J Wilhelm, Sarah Cahill, Rei Nakagawa, Patricia Desmarchelier, Andrijana Rajić
Pork is one of the major food sources of human salmonellosis worldwide, while beef products have been implicated in numerous foodborne outbreaks. As a result, effective interventions to reduce Salmonella contamination during beef and pork processing are of interest to both regulators and industry. We conducted a rapid systematic review and meta-analysis of literature investigating the efficacy of slaughter and processing interventions to control Salmonella in beef and pork. Review steps included: a comprehensive search strategy; relevance screening of abstracts; relevance confirmation of articles; data extraction; risk-of-bias assessment; meta-analysis (where appropriate); and a weight-of-evidence assessment...
December 2016: Journal of Food Protection
https://www.readbyqxmd.com/read/28104546/dying-in-intensive-care-units-of-india-commentaries-on-policies-and-position-papers-on-palliative-and-end-of-life-care
#5
REVIEW
Jaydeep Sengupta, Suhita Chopra Chatterjee
PURPOSE: This study critically examines the available policy guidelines on integration of palliative and end-of-life care in Indian intensive care units to appraise their congruence with Indian reality. MATERIALS AND METHODS: Six position statements and guidelines issued by the Indian Society for Critical Care Medicine and the Indian Association of Palliative Care from 2005 till 2015 were examined. The present study reflects upon the recommendations suggested by these texts...
December 24, 2016: Journal of Critical Care
https://www.readbyqxmd.com/read/28101766/crossing-the-blood-brain-barrier-recent-advances-in-drug-delivery-to-the-brain
#6
Mayur M Patel, Bhoomika M Patel
CNS disorders are on the rise despite advancements in our understanding of their pathophysiological mechanisms. A major hurdle to the treatment of these disorders is the blood-brain barrier (BBB), which serves as an arduous janitor to protect the brain. Many drugs are being discovered for CNS disorders, which, however fail to enter the market because of their inability to cross the BBB. This is a pronounced challenge for the pharmaceutical fraternity. Hence, in addition to the discovery of novel entities and drug candidates, scientists are also developing new formulations of existing drugs for brain targeting...
January 18, 2017: CNS Drugs
https://www.readbyqxmd.com/read/28098273/high-definition-infrared-chemical-imaging-of-colorectal-tissue-using-a-spero-qcl-microscope
#7
B Bird, J Rowlette
Mid-infrared microscopy has become a key technique in the field of biomedical science and spectroscopy. This label-free, non-destructive technique permits the visualisation of a wide range of intrinsic biochemical markers in tissues, cells and biofluids by detection of the vibrational modes of the constituent molecules. Together, infrared microscopy and chemometrics is a widely accepted method that can distinguish healthy and diseased states with high accuracy. However, despite the exponential growth of the field and its research world-wide, several barriers currently exist for its full translation into the clinical sphere, namely sample throughput and data management...
January 18, 2017: Analyst
https://www.readbyqxmd.com/read/28097753/fully-copper-exchanged-high-silica-lta-zeolites-as-unrivaled-hydrothermally-stable-nh3-scr-catalysts
#8
Taekyung Ryu, Nak Ho Ahn, Seungwan Seo, Jung Cho, Hyojun Kim, Donghui Jo, Gi Tae Park, Pyung Soon Kim, Chang Hwan Kim, Elliott L Bruce, Paul A Wright, In-Sik Nam, Suk Bong Hong
Diesel engine technology is still the most effective solution to meet tighter CO2 regulations in the mobility and transport sector. In implementation of fuel-efficient diesel engines, the poor thermal durability of lean nitrogen oxides (NOx ) aftertreatment systems remains as one major technical hurdle. Divalent copper ions when fully exchanged into high-silica LTA zeolites are demonstrated to exhibit excellent activity maintenance for NOx reduction with NH3 under vehicle simulated conditions even after hydrothermal aging at 900 °C, a critical temperature that the current commercial Cu-SSZ-13 catalyst cannot overcome owing to thermal deactivation...
January 18, 2017: Angewandte Chemie
https://www.readbyqxmd.com/read/28095367/micrornas-are-important-regulators-of-drug-resistance-in-colorectal-cancer
#9
Yang Zhang, Jing Wang
Despite of continuous development of cancer treatment over the past decades, drug resistance is still one of the major hurdles of effective therapy for advanced colorectal cancer (CRC) worldwide and the understanding of its underlying mechanisms remains limited. Emerged data suggests that many microRNAs (miRNAs) may contribute to drug resistance in CRC. Major findings on miRNA functions in drug resistance of CRC are systemically reviewed here, with the goal of providing new updates to broaden our comprehension of its mechanisms and evidence to utilize miRNAs as potential therapeutic targets for CRC treatment...
January 14, 2017: Biological Chemistry
https://www.readbyqxmd.com/read/28092994/current-status-and-future-prospects-of-hyperthermic-intraoperative-intraperitoneal-chemotherapy-hipec-clinical-trials-in-ovarian-cancer
#10
Renee A Cowan, Roisin E O'Cearbhaill, Oliver Zivanovic, Dennis S Chi
The natural history of advanced-stage epithelial ovarian cancer is one of clinical remission after surgery and platinum/taxane-based intravenous and/or intraperitoneal chemotherapy followed by early or late recurrence in the majority of patients. Prevention of progression and recurrence remains a major hurdle in the management of ovarian cancer. Recently, many investigators have evaluated the use of normothermic and hyperthermic intraoperative intraperitoneal drug delivery as a management strategy. This is a narrative review of the current status of clinical trials of hyperthermic intraoperative intraperitoneal chemotherapy (HIPEC) in ovarian cancer and the future directions for this treatment strategy...
January 16, 2017: International Journal of Hyperthermia
https://www.readbyqxmd.com/read/28092210/the-insights-of-health-and-welfare-professionals-on-hurdles-that-impede-economic-evaluations-of-welfare-interventions
#11
J Schepers, J Plaete, I De Bourdeaudhuij, L Annemans, S Simoens
OBJECTIVES: Four hurdles associated with economic evaluations in welfare interventions were identified and discussed in a previous published literature review. These hurdles include (i) 'Ignoring the impact of condition-specific outcomes', (ii) 'Ignoring the impact of QoL externalities', (iii) 'Calculation of costs from a too narrow perspective' and (iv) 'The lack of well-described & standardized interventions'. This study aims to determine how healthcare providers and social workers experience and deal with these hurdles in practice and what solutions or new insights they would suggest...
January 16, 2017: Expert Review of Pharmacoeconomics & Outcomes Research
https://www.readbyqxmd.com/read/28090147/regression-shrinkage-and-neural-models-in-predicting-the-results-of-400-metres-hurdles-races
#12
K Przednowek, J Iskra, A Maszczyk, M Nawrocka
This study presents the application of regression shrinkage and artificial neural networks in predicting the results of 400-metres hurdles races. The regression models predict the results for suggested training loads in the selected three-month training period. The material of the research was based on training data of 21 Polish hurdlers from the Polish National Athletics Team Association. The athletes were characterized by a high level of performance. To assess the predictive ability of the constructed models a method of leave-one-out cross-validation was used...
December 2016: Biology of Sport
https://www.readbyqxmd.com/read/28088572/bcs-class-iv-drugs-highly-notorious-candidates-for-formulation-development
#13
REVIEW
Rohan Ghadi, Neha Dand
BCS class IV drugs (e.g., amphotericin B, furosemide, acetazolamide, ritonavir, paclitaxel) exhibit many characteristics that are problematic for effective oral and per oral delivery. Some of the problems associated include low aqueous solubility, poor permeability, erratic and poor absorption, inter and intra subject variability and significant positive food effect which leads to low and variable bioavailability. Also, most of the class IV drugs are substrate for P-glycoprotein (low permeability) and substrate for CYP3A4 (extensive pre systemic metabolism) which further potentiates the problem of poor therapeutic potential of these drugs...
January 11, 2017: Journal of Controlled Release: Official Journal of the Controlled Release Society
https://www.readbyqxmd.com/read/28088076/in%C3%A2-vivo-visualization-of-endogenous-mir-21-using-hyaluronic-acid-coated-graphene-oxide-for-targeted-cancer-therapy
#14
Do Won Hwang, Han Young Kim, Fangyuan Li, Ji Yong Park, Dohyun Kim, Jae Hyung Park, Hwa Seung Han, Jung Woo Byun, Yun-Sang Lee, Jae Min Jeong, Kookheon Char, Dong Soo Lee
Oncogene-targeted nucleic acid therapy has been spotlighted as a new paradigm for cancer therapeutics. However, in vivo delivery issues and uncertainty of therapeutic antisense drug reactions remain critical hurdles for a successful targeted cancer therapy. In this study, we developed a fluorescence-switchable theranostic nanoplatform using hyaluronic acid (HA)-conjugated graphene oxide (GO), which is capable of both sensing oncogenic miR-21 and inhibiting its tumorigenicity simultaneously. Cy3-labeled antisense miR-21 peptide nucleic acid (PNA) probes loaded onto HA-GO (HGP21) specifically targeted CD44-positive MBA-MB231 cells and showed fluorescence recovery by interacting with endogenous miR-21 in the cytoplasm of the MBA-MB231 cells...
March 2017: Biomaterials
https://www.readbyqxmd.com/read/28080154/biocompatibility-assessments-for-medical-devices-evolving-regulatory-considerations
#15
Lesley Reeve, Paul Baldrick
Biocompatibility assessment provides key data supporting medical device development and marketing. Although regional and international guidance is available, differences in proposed biocompatibility assessments or test methods lead to confusion and inefficiencies in generating the package of supporting nonclinical data. Areas covered: Modifications to available guidance for biological safety testing of medical devices, as described by the International Organisation for Standardisation (ISO) and the US Food and Drug Administration (FDA), have, over time, sometimes increased and sometimes decreased the level of harmonisation in testing requirements...
January 12, 2017: Expert Review of Medical Devices
https://www.readbyqxmd.com/read/28079591/point-of-care-diagnostics-extending-the-laboratory-network-to-reach-the-last-mile
#16
Paul K Drain, Christine Rousseau
PURPOSE OF REVIEW: More point-of-care (POC) diagnostic tests are becoming available for HIV diagnosis and treatment in resource-limited settings. These novel technologies have the potential to foster decentralized HIV care and treatment for the benefit of clinical laboratories, HIV clinics, and HIV-infected patients. There continue to be many business, technological, and operational challenges that limit product development and regulatory approval, which limits products available for the required operational and cost-effectiveness studies and delays policy adoption and implementation...
January 11, 2017: Current Opinion in HIV and AIDS
https://www.readbyqxmd.com/read/28073694/hiv-latency-should-we-shock-or-lock
#17
REVIEW
Gilles Darcis, Benoit Van Driessche, Carine Van Lint
Combinatory antiretroviral therapy (cART) increases the survival and quality of life of HIV-1-infected patients. However, interruption of therapy almost invariably leads to the re-emergence of detectable viral replication because HIV-1 persists in viral latent reservoirs. Improved understanding of the molecular mechanisms involved in HIV-1 latency has paved the way for innovative strategies that attempt to purge latent virus. In this article we discuss the results of the broadly explored 'shock and kill' strategy, and also highlight the major hurdles facing this approach...
January 7, 2017: Trends in Immunology
https://www.readbyqxmd.com/read/28073086/human-neural-progenitors-derived-from-integration-free-ipscs-for-sci-therapy
#18
Ying Liu, Yiyan Zheng, Shenglan Li, Haipeng Xue, Karl Schmitt, Georgene W Hergenroeder, Jiaqian Wu, Yuanyuan Zhang, Dong H Kim, Qilin Cao
As a potentially unlimited autologous cell source, patient induced pluripotent stem cells (iPSCs) provide great capability for tissue regeneration, particularly in spinal cord injury (SCI). However, despite significant progress made in translation of iPSC-derived neural progenitor cells (NPCs) to clinical settings, a few hurdles remain. Among them, non-invasive approach to obtain source cells in a timely manner, safer integration-free delivery of reprogramming factors, and purification of NPCs before transplantation are top priorities to overcome...
January 5, 2017: Stem Cell Research
https://www.readbyqxmd.com/read/28070773/challenges-and-opportunities-building-a-relationship-between-a-department-of-biomedical-engineering-and-a-medical-school
#19
EDITORIAL
Steven C George, M Elizabeth Meyerand
A department of biomedical engineering can significantly enhance the impact of their research and training programs if a productive relationship with a medical school can be established. In order to develop such a relationship, significant hurdles must be overcome. This editorial summarizes some of the major challenges and opportunities for a department of biomedical engineering as they seek to build or enhance a relationship with a medical school. The ideas were formulated by engaging the collective wisdom from the Council of Chairs of the biomedical engineering departments...
January 9, 2017: Annals of Biomedical Engineering
https://www.readbyqxmd.com/read/28068829/career-satisfaction-and-work-stressors-in-psychiatrists-and-psychiatry-trainees-in-australia-and-new-zealand
#20
Sarah Rotstein, Kym Jenkins
OBJECTIVE: To assess the level of career satisfaction and factors associated with work stress in members of the Royal Australian and New Zealand College of Psychiatrists (RANZCP). METHODS: In 2014 an online survey was distributed to members of the RANZCP (including psychiatrists and psychiatry trainees). RESULTS: A total of 1051 members responded to the survey. Almost 85% of respondents indicated that they were satisfied with the work they were doing at the current stage of their career...
January 1, 2017: Australasian Psychiatry: Bulletin of Royal Australian and New Zealand College of Psychiatrists
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