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PubMed Journals Articles About "Sigma Pharmaceuticals Limited" RSS

16:55 EDT 20th September 2018 | BioPortfolio

Sigma Pharmaceuticals Limited PubMed articles on BioPortfolio. Our PubMed references draw on over 21 million records from the medical literature. Here you can see the latest Sigma Pharmaceuticals Limited articles that have been published worldwide.

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We have published hundreds of Sigma Pharmaceuticals Limited news stories on BioPortfolio along with dozens of Sigma Pharmaceuticals Limited Clinical Trials and PubMed Articles about Sigma Pharmaceuticals Limited for you to read. In addition to the medical data, news and clinical trials, BioPortfolio also has a large collection of Sigma Pharmaceuticals Limited Companies in our database. You can also find out about relevant Sigma Pharmaceuticals Limited Drugs and Medications on this site too.

Showing "Sigma Pharmaceuticals Limited" PubMed Articles 1–25 of 432

Synthesis and pharmacological evaluation of 6,7-dimethoxy-1,2,3,4-tetrahydroisoquinoline derivatives as sigma-2 receptor ligands.

Increasing evidences have implicated that sigma-2 receptor is a biomarker and significantly over-expressed in many proliferative cancer cells with no or low expression in normal cells. Sigma-2 receptor selective ligands have been successfully used as valuable tools to study its pharmacological functions, tumor imaging, and cancer therapeutics or adjuvants. 6,7-Dimethoxy-1,2,3,4-tetrahydroisoquinolinylalkyl benzamides are among a few categories of structures that have demonstrated high affinities and selecti...


Performance specifications and six sigma theory: Clinical chemistry and industry compared.

Analytical performance specifications are crucial in test development and quality control. Although consensus has been reached on the use of biological variation to derive these specifications, no consensus has been reached which model should be preferred. The Six Sigma concept is widely applied in industry for quality specifications of products and can well be compared with Six Sigma models in clinical chemistry. However, the models for measurement specifications differ considerably between both fields: wh...

Swimming activity in zebrafish larvae exposed to veterinary antiparasitic pharmaceuticals.

Veterinary antiparasitic pharmaceuticals have been detected in surface waters and several of these pharmaceuticals act on the nervous system on the target organisms implying that neurological effects also might be of concern in non-target animals such as fish. We tested if exposure to antiparasitic pharmaceuticals affect swimming activity in 6 days old zebrafish larvae. The results revealed that most pharmaceuticals did not cause any effects in swimming activity. However, larvae exposed to 0.58 mg/L doram...


Investigating isoindoline, tetrahydroisoquinoline, and tetrahydrobenzazepine scaffolds for their sigma receptor binding properties.

Substituted norbenzomorphans are known to display high affinity and selectivity for the two sigma receptor (σR) subtypes. In order to study the effects of simplifying the structures of these compounds, a scaffold hopping strategy was used to design several novel sets of substituted isoindolines, tetrahydroisoquinolines and tetrahydro-2-benzazepines. The binding affinities of these new compounds for the sigma 1 (σ1R) and sigma 2 (σ2R) receptors were determined, and some analogs were identified that exhibi...

Autoverification process improvement by Six Sigma approach: Clinical chemistry & immunoassay.

This study examines effectiveness of a project to enhance an autoverification (AV) system through application of Six Sigma (DMAIC) process improvement strategies.

Assessment of 83 pharmaceuticals in WWTP influent and effluent samples by UHPLC-MS/MS: Hourly variation.

The removal efficiency of pharmaceuticals in wastewater treatment plants (WWTPs) is variable and some of these compounds pass these plants almost intact and others presenting a removal efficiency close to 100%. Their incomplete removal results in a continuous discharge of pharmaceuticals into the environment. To assess the profile of contamination of influents and effluents over a day, a set of 83 pharmaceuticals were evaluated hourly in a WWTP in Leiria, Portugal. The composite samples of the influent and ...

Letter--Incorporating Real-World Evidence and Patient Value Criteria into Value-Based Frameworks for Relapsed/Refractory Multiple Myeloma.

Orlowski has received research funding from Amgen, BioTheryX, Bristol-Myers Squibb, Celgene Corporation, and Takeda Pharmaceuticals; honoraria from Amgen, Bristol-Myers Squibb, Celgene Corporation, Janssen, Millennium Pharmaceuticals, and Onyx Pharmaceuticals; and is a member of advisory boards for Amgen, Bristol-Myers Squibb, Celgene Corporation, Incyte, Kite, Legend Biotech, Sanofi-Aventis, and Takeda Pharmaceuticals.

Development of a novel radiobromine-labeled sigma-1 receptor imaging probe.

Sigma-1 receptor is a target for tumor imaging. In a previous study, we synthesized a vesamicol analog, (+)-2-[4-(4-bromophenyl)piperidino]cyclohexanol [(+)-pBrV], with a high affinity for sigma-1 receptor, and synthesized radiobrominated (+)-pBrV. This radiobrominated (+)-pBrV showed high tumor uptake in tumor-bearing mice; however, radioactivity accumulation in normal tissues, such as the liver, was high. We assumed that the accumulation of (+)-pBrV in the non-target tissues was partially derived from its...

Post-production handling and administration of protein pharmaceuticals and potential instability issues.

The safety and efficacy of protein pharmaceuticals depend not only on biological activity, but also on purity levels. Impurities may be process related due to limitations in manufacturing, or product related caused by protein degradation occurring throughout the life history of a product. Although the pharmaceutical biotechnology industry has made great progress in improving bulk and drug product manufacturing as well as company-controlled storage and transportation conditions to minimize the level of degra...

Effects of pharmaceuticals on microbial communities and activity of soil enzymes in mesocosm-scale constructed wetlands.

Cyperus alternifolius based mesocosm-scale constructed wetland was employed to remove pharmaceuticals. We investigated the microbial community composition using phosphor lipid fatty acids (PFLAs) analysis and substrate enzyme activity during long-term exposure to pharmaceuticals in mesocosm-scale constructed wetlands. The results showed that there was no visible inhibition effect of pharmaceuticals on CW substrate enzymes activities in the experimental range (0-500 μg/L). Microbial communities, as reveal...

Long story short: an introduction to the short-term and long-term Six Sigma quality and its importance in the laboratory medicine for the management of extra-analytical processes.

There is a compelling need for quality tools that enable effective control of the extra-analytical phase. In this regard, Six Sigma seems to offer a valid methodological and conceptual opportunity, and in recent times, the International Federation of Clinical Chemistry and Laboratory Medicine has adopted it for indicating the performance requirements for non-analytical laboratory processes. However, the Six Sigma implies a distinction between short-term and long-term quality that is based on the dynamics of...

Impact of Pharmaceuticals on the Environment: Risk Assessment Using QSAR Modeling Approach.

An extensive use of pharmaceuticals and the widespread practices of their erroneous disposal measures have made these products contaminants of emerging concern (CEC). Especially, active pharmaceutical ingredients (APIs) are ubiquitously detected in surface water and soil, mainly in the aquatic compartment, where they do affect the living systems. Unfortunately, there is a huge gap in the availability of ecotoxicological data on pharmaceuticals' environmental behavior and ecotoxicity which force EMEA (Europe...

From Oxiranes to Oligomers: Architectures of US FDA Approved Pharmaceuticals Containing Oxygen Heterocycles.

Oxygen heterocycles are the second most common type of heterocycles that appear as structural components of US Food and Drug Administration (FDA) approved pharmaceuticals. Analysis of our database of drugs approved through 2017, reveals 311 distinct pharmaceuticals containing at least one oxygen heterocycle. Most prevalent among these are pyranoses, with furanoses, macrolactones, morpholines, and dioxolanes rounding out the top five. The main body of this perspective is organized according to ring-size, com...

Fixed-bearing versus high-flexion RP total knee arthroplasty (TKA): midterm results of a randomized controlled trial.

We compared the midterm results after total knee arthroplasty (TKA) using PFC Sigma RP-F mobile model with PFC Sigma PS fixed model.

Environmental concentrations of pharmaceuticals directly affect phytoplankton and effects propagate through trophic interactions.

Pharmaceuticals are found in freshwater ecosystems where even low concentrations in the range of ng Lmay affect aquatic organisms. In the current study, we investigated the effects of chronic exposure to three pharmaceuticals on two microalgae, a potential modulation of the effects by additional inorganic phosphorus (P) limitation, and a potential propagation of the pharmaceuticals' effect across a trophic interaction. The latter considers that pharmaceuticals are bioaccumulated by algae, potentially metabo...

Point of Care 2.0: Coagulation Monitoring Using Rotem® Sigma and Teg® 6S.

New-generation methods for point of care based coagulation monitoring enable fully automated viscoelastic analyses for the assessment of particular parts of hemostasis. Contrary to the measuring techniques of former models, the viscoelastic ROTEM sigma and TEG 6s analyses are performed in single-use test cartridges without time- and personnel-intensive pre-analytical procedures. This review highlights methodical strengths and limitations of the devices and meets concerns associated with their integration in...

New toxicogenetic insights and ranking of the selected pharmaceuticals belong to the three different classes: A toxicity estimation to confirmation approach.

Tetracycline hydrochloride (TH), indomethacin (IM), and bezafibrate (BF) belong to the three different important classes of pharmaceuticals, which are well known for their toxicity and environmental concerns. However, studies are still elusive to highlight the mechanistic toxicity of these pharmaceuticals and rank them using both, the toxicity prediction and confirmation approaches. Therefore, we employed the next generation toxicity testing in 21st century (TOX21) tools and estimated the in vitro/vivo toxi...

Spatial patterns of pharmaceuticals and wastewater tracers in the Hudson River Estuary.

The widespread use of pharmaceuticals by human populations results in their sustained discharge to surface waters via wastewater treatment plants (WWTPs). In this study, 16 highly prescribed pharmaceuticals were quantified along a 250 km transect of the Hudson River Estuary and New York Harbor to describe their sources and spatial patterns. Sampling was conducted over two dry weather periods in May and July 2016, at 72 sites which included mid-channel and nearshore sites, as well as locations influenced b...

The quantification of pharmaceutical related biological activity in effluents from wastewater treatment plants in UK and Japan.

Whilst pharmaceuticals are now routinely detected in aquatic environments, we know little of the biological activity their presence might provoke. It is estimated that nearly 40% of all marketed pharmaceuticals are G protein-coupled receptors (GPCRs)-acting pharmaceuticals. Here, we applied an in vitro assay, called the TGFα shedding assay, to measure the biological activities of GPCRs-acting pharmaceuticals present in effluents from municipal wastewater treatment plants in the United Kingdom (UK) and Japa...

The Electronic Structure of OsSi Calculated by MS-NEVPT2 with Inclusion of the Relativistic Effects.

The electronic states of \ce{OsSi} are calculated by Multi-State N-Electron Valence State Second Order Perturbation Theory (MS-NEVPT2) with all-electron basis sets. The relativistic effects are considered comprehensively that allows us to identify the $X^{3}\Sigma^-_{0^+}$ ground state. The theoretical equilibrium bond length 2.103 {\AA} is close to the experimental measurement of 2.1207 {\AA} while the vibrational frequency 466 cm$^{-1}$ is smaller than the experimental value of 516 cm$^{-1}$. Two excited ...

Urbanization gradient of selected pharmaceuticals in surface water at a watershed scale.

Ubiquitous detection of pharmaceuticals in the aquatic environment around the world raises a great public concern. Aquatic residuals of pharmaceuticals have been assumed to relate to land use patterns and various human activities within a catchment or watershed. This study generated a gradient of human activity in the Jiulong River watershed, southeastern China by urban land use percentage in 20 research subwatersheds. Thirty-three compounds from three-category pharmaceuticals [26 compounds of 5 antibiotic ...

Advanced oxidation process-mediated removal of pharmaceuticals from water: A review.

Pharmaceuticals, which are frequently detected in natural and wastewater bodies as well as drinking water have attracted considerable attention, because they do not readily biodegrade and may persist and remain toxic. As a result, pharmaceutical residues pose on-going and potential health and environmental risks. To tackle these emerging contaminants, advanced oxidation processes (AOPs) such as photo-Fenton, sonolysis, electrochemical oxidation, radiation and ozonation etc. have been applied to remove pharm...

Adsorptive interaction of cationic pharmaceuticals on activated charcoal: Experimental determination and QSAR modelling.

Due to high mobility and specific toxic actions of the ionizable pharmaceuticals in surface water with a normal range of pH, the pharmaceuticals should be removed before being discharged. Therefore, this study investigated the adsorptive interactions between cationic pharmaceuticals and a popular adsorbent (i.e., activated charcoal) frequently used in water treatment processes. For that, we performed isotherm experiments and then the results were plotted by Langmuir model to determine the adsorption affinit...

Spatial distribution of pharmaceuticals in conventional wastewater treatment plant with Sludge Treatment Reed Beds technology.

Pharmaceutical residues are an emerging environmental problem. It is strongly confirmed that pharmaceuticals are present in soils and environmental waters (surface, marine and even groundwater), and that wastewater treatment plant (WWTP) effluents are the main source of pharmaceuticals in the watershed. The aim of this study was to recognize the spatial distribution and seasonal changes of selected pharmaceuticals in conventional WWTP with Sludge Treatment Reed Beds (STRBs) technology used for dewatering an...

Unveiling the important roles of coexisting contaminants on photochemical transformations of pharmaceuticals: Fibrate drugs as a case study.

Pharmaceuticals are a group of ubiquitous emerging pollutants, many of which have been shown to undergo efficient photolysis in the environment. Photochemically produced reactive intermediates (PPRIs) sensitized by the pharmaceuticals in sunlit natural waters may induce photodegradation of coexisting compounds. In this study, the roles of coexisting contaminants on the phototransformation of pharmaceuticals were unveiled with the fibrate drugs gemfibrozil (GMF), fenofibrate (FNF), and fenofibric acid (FNFA)...


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