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Andre Harrell, music exec who discovered Diddy, dies at 59

Andre Harrell, the Uptown Records founder who shaped the sound of hip-hop and R&B in the late '80s and '90s with acts such as Mary J. Blige and Heavy D and also launched the career of mogul Sean "Diddy" Combs, has died. He was 59.




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2,200 year old ancient city Aigai waiting to be discovered

Only one percent of the ancient city of Aigai in the Yunuslar district of the western Turkish province of Manisa has been unearthed so far in the excavations that started back in 2004. Click through for the story in photos...




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Italian scientist says she discovered main mechanism behind COVID-19


Annalisa Chiusolo shows how controversial drug hydroxychloroquine could make people immune to virus * Top Israeli researcher: ‘theory lacks backing’




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Second case of bird flu discovered in Pardubice area

Prague Daily Monitor

A second case of bird flu was discovered in Pardubice area at a commercial chicken farm, the spokesperson for the Minister of Agriculture Vojtěch Bílý communicated the news to ČTK. The first case in three years was discovered this year in January at a farm in small farm in the Žďár area. The Ministry is still analyzing the situation and will hold a press conference which will include the Minister of Agriculture and the Director of the Czech Veterinary Office.

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Evergrande’s Emerald Bay flats flop in their third weekend sale in three months as homebuyers ignore developer’s discount

China Evergrande’s weekend sale of its Emerald Bay flats in Tuen Mun has flopped for the third time in as many months, as Hong Kong’s homebuyers shunned its meagre discounts in anticipation of further price declines.The developer managed to find buyers for 41 flats, or 12 per cent of the 335 units on offer at 8:30pm, according to sales agents.In March, the developer sold 49 of 141 flats when it launched the project in the midst of the city’s coronavirus outbreak, at a time when social…




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Religion & its Discontents: Considerations Around COVID-19 & Africa

Dr. Azza Karam is the Secretary General of Religions for Peace International and Professor of Religion and Development at the Vrije Universiteit (VU), Amsterdam; Dr. Mustafa Y. Ali is the Secretary General of the Global Network of Religions for Children (GNRC) based in Nairobi, Kenya.

The post Religion & its Discontents: Considerations Around COVID-19 & Africa appeared first on Inter Press Service.




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Anonymous tip 'led to the discovery of more than a dozen bodies' at US nursing home

Police responding to an anonymous tip found more than a dozen bodies at a nursing home in north-western New Jersey, according to reports.




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My surprising discovery about women’s opportunities in Armenia -- by Saleha Waseem

Underserved businesses run by women in Armenia need help to create a reliable client base and convince skeptical banks that their enterprises are a good investment.




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JBL has big discounts on audio tech for Earth Week




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Nobel prize in physics for discovery of exoplanet orbiting a star

The Nobel prize in physics has been jointly awarded to  James Peebles, Michel Mayor and Didier Queloz for their contributions to our understanding of the evolution of the universe and Earth’s place in the cosmos.




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We've discovered a strange twist in the story of how crystals form

The defining feature of a crystal is that it is made from regular, repeating blocks, but a chance discovery in an old German book has turned that view on its head




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New Scientist ranks the top 10 discoveries of the decade

The 2010s saw huge advancements across science and technology. Relive the best moments with our definitive ranking of the decade




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Cecilia Payne-Gaposchkin: The unsung discoverer of star chemistry

Cecilia Payne-Gaposchkin, who discovered that hydrogen dominates our universe, finally gets the recognition she deserves in a rich biography, What Stars Are Made Of




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Scientists have discovered five new species of songbird in Indonesia

Five species of songbird and five subspecies have been discovered by scientists for the first time in mountainous areas of Indonesia




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Cretaceous insect discovered with extremely weird antennae

Amber from the Cretaceous period trapped a leaf-footed bug with extremely long and wide antennae, which may have helped disguise the insect or confuse predators




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Animal that doesn't need oxygen to survive discovered

All animals rely on oxygen at least at some stage of their life, but a parasite that infects fish seems to have completely lost the ability to use it – where it gets its energy from is still a mystery




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World’s highest mammal discovered at the top of a Mars-like volcano

The highest dwelling mammal – a mouse – has been discovered at 6700 metres above sea level, where conditions are so harsh they have been compared to Mars




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Newly discovered species found deep in the ocean contains microplastic

A shrimp-like creature found 6 kilometres down in the Pacific Ocean’s deepest trench has been named Eurythenes plasticus after the microplastics found in its gut




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Tiny bird-like dinosaur discovered in amber might actually be a lizard

A 99-million-year-old skull recently discovered in amber might actually belong to a lizard, rather than a tiny bird-like dinosaur as first thought




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Scientists chasing waterfalls discovered something they aren't used to

We often think waterfalls indicate ancient tectonic or glacial activity – but it turns out they can form all by themselves without these external influences




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We've discovered a massive dinosaur-era river delta under the sea

Some of the first dinosaurs may have lived and hunted on the largest delta plain ever discovered, which was 10 times the size of the Amazon river delta




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‘Bonehenge’: Stone Age structure of mammoth bones discovered in Russia

People living in Russia about 20,000 years ago built a "bonehenge" – a circular structure made of mammoth bones that could have been used to store food




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Missing for a century, giant Galapagos tortoise is discovered again

Forrest Galante, a host of 'Extinct or Alive' on the 'Animal Planet,' recounts the locating of the Fernandina Island tortoise that hasn't been heard from since 1906. (Dan Fastenberg reports.)




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Discover the Next Level of Experiences with HARMAN at CES 2020

Each year, HARMAN kicks off the New Year at CES, the premier consumer electronics show that takes place each January in Las Vegas. From the legendary HARMAN showcase at the Hard Rock, we’ll be once again showing what’s coming next when it comes to...




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Discover how to sit to dodge the dangers of inactivity

Inactivity is the new smoking and is linked to heart disease and cancer, but we can learn from kids and modern hunter-gatherers to make sitting less dangerous




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Scientists Discover Substance That Causes Pain

Title: Scientists Discover Substance That Causes Pain
Category: Health News
Created: 4/28/2010 2:10:00 PM
Last Editorial Review: 4/29/2010 12:00:00 AM




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Pacifiers Don't Discourage Breast-Feeding, Study Says

Title: Pacifiers Don't Discourage Breast-Feeding, Study Says
Category: Health News
Created: 4/30/2012 10:05:00 AM
Last Editorial Review: 4/30/2012 12:00:00 AM




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Gene Discoveries Could Help Rheumatoid Arthritis Treatment

Title: Gene Discoveries Could Help Rheumatoid Arthritis Treatment
Category: Health News
Created: 4/28/2015 12:00:00 AM
Last Editorial Review: 4/29/2015 12:00:00 AM




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U.S. Workplaces Roiled by Post-Election Discord, Poll Finds

Title: U.S. Workplaces Roiled by Post-Election Discord, Poll Finds
Category: Health News
Created: 5/3/2017 12:00:00 AM
Last Editorial Review: 5/4/2017 12:00:00 AM




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Newly Discovered Illness May Cause Nearly 1 in 5 Dementias, Experts Say

Title: Newly Discovered Illness May Cause Nearly 1 in 5 Dementias, Experts Say
Category: Health News
Created: 4/30/2019 12:00:00 AM
Last Editorial Review: 5/1/2019 12:00:00 AM




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Discovering Associated Data in PMC

In the NLM Strategic Plan released earlier this year, we noted that “[c]reating efficient ways to link the literature with associated datasets enables knowledge generation and discovery.” To that end, PMC is now aggregating data citations, data availability statements and supplementary materials, as available, in an Associated Data box. This box will only display on articles that have one or more of these features in the article.

To limit your search to records with an Associated Data box, you can use the new "Associated Data" facet on the search results page:

We hope that exposing this content in a consistent format and in an easy to find and easy to access manner, you will more readily find the datasets you need to further accelerate discovery and advance health. As part of our ongoing commitment to making data findable, accessible, interoperable, and re-usable (FAIR), we encourage you to contact us with your feedback on these updates and with any other suggestions you may have for improving discovery of related data in PMC.




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Using Colonization Assays and Comparative Genomics To Discover Symbiosis Behaviors and Factors in Vibrio fischeri

ABSTRACT

The luminous marine Gram-negative bacterium Vibrio (Aliivibrio) fischeri is the natural light organ symbiont of several squid species, including the Hawaiian bobtail squid, Euprymna scolopes, and the Japanese bobtail squid, Euprymna morsei. Work with E. scolopes has shown how the bacteria establish their niche in the light organ of the newly hatched host. Two types of V. fischeri strains have been distinguished based upon their behavior in cocolonization competition assays in juvenile E. scolopes, i.e., (i) niche-sharing or (ii) niche-dominant behavior. This study aimed to determine whether these behaviors are observed with other V. fischeri strains or whether they are specific to those isolated from E. scolopes light organs. Cocolonization competition assays between V. fischeri strains isolated from the congeneric squid E. morsei or from other marine animals revealed the same sharing or dominant behaviors. In addition, whole-genome sequencing of these strains showed that the dominant behavior is polyphyletic and not associated with the presence or absence of a single gene or genes. Comparative genomics of 44 squid light organ isolates from around the globe led to the identification of symbiosis-specific candidates in the genomes of these strains. Colonization assays using genetic derivatives with deletions of these candidates established the importance of two such genes in colonization. This study has allowed us to expand the concept of distinct colonization behaviors to strains isolated from a number of squid and fish hosts.

IMPORTANCE There is an increasing recognition of the importance of strain differences in the ecology of a symbiotic bacterial species and, in particular, how these differences underlie crucial interactions with their host. Nevertheless, little is known about the genetic bases for these differences, how they manifest themselves in specific behaviors, and their distribution among symbionts of different host species. In this study, we sequenced the genomes of Vibrio fischeri isolated from the tissues of squids and fishes and applied comparative genomics approaches to look for patterns between symbiont lineages and host colonization behavior. In addition, we identified the only two genes that were exclusively present in all V. fischeri strains isolated from the light organs of sepiolid squid species. Mutational studies of these genes indicated that they both played a role in colonization of the squid light organ, emphasizing the value of applying a comparative genomics approach in the study of symbioses.




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Evaluation of Cycle Threshold, Toxin Concentration, and Clinical Characteristics of Clostridioides difficile Infection in Patients with Discordant Diagnostic Test Results [Bacteriology]

Clostridioides difficile infection (CDI) is one of the most common health care-associated infections that can cause significant morbidity and mortality. CDI diagnosis involves laboratory testing in conjunction with clinical assessment. The objective of this study was to assess the performance of various C. difficile tests and to compare clinical characteristics, Xpert C. difficile/Epi (PCR) cycle threshold (CT), and Singulex Clarity C. diff toxins A/B (Clarity) concentrations between groups with discordant test results. Unformed stool specimens from 200 hospitalized adults (100 PCR positive and 100 negative) were tested by cell cytotoxicity neutralization assay (CCNA), C. diff Quik Chek Complete (Quik Chek), Premier Toxins A and B, and Clarity. Clinical data, including CDI severity and CDI risk factors, were compared between discordant test results. Compared to CCNA, PCR had the highest sensitivity at 100% and Quik Chek had the highest specificity at 100%. Among clinical and laboratory data studied, prevalences of leukocytosis, prior antibiotic use, and hospitalizations were consistently higher across all subgroups in comparisons of toxin-positive to toxin-negative patients. Among PCR-positive samples, the median CT was lower in toxin-positive samples than in toxin-negative samples; however, CT ranges overlapped. Among Clarity-positive samples, the quantitative toxin concentration was significantly higher in toxin-positive samples than in toxin-negative samples as determined by CCNA and Quik Chek Toxin A and B. Laboratory tests for CDI vary in sensitivity and specificity. The quantitative toxin concentration may offer value in guiding CDI diagnosis and treatment. The presence of leukocytosis, prior antibiotic use, and previous hospitalizations may assist with CDI diagnosis, while other clinical parameters may not be consistently reliable.




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Inner Ear Arginine Vasopressin-Vasopressin Receptor 2-Aquaporin 2 Signaling Pathway Is Involved in the Induction of Motion Sickness [Drug Discovery and Translational Medicine]

It has been identified that arginine vasopressin (AVP), vasopressin receptor 2(V2R), and the aquaporin 2 (AQP2) signaling pathway in the inner ear play important roles in hearing and balance functions through regulating the endolymph equilibrium; however, the contributions of this signaling pathway to the development of motion sickness are unclear. The present study was designed to investigate whether the activation of the AVP-V2R-AQP2 signaling pathway in the inner ear is involved in the induction of motion sickness and whether mozavaptan, a V2R antagonist, could reduce motion sickness. We found that both rotatory stimulus and intraperitoneal AVP injection induced conditioned taste aversion (a confirmed behavioral index for motion sickness) in rats and activated the AVP-V2R-AQP2 signaling pathway with a responsive V2R downregulation in the inner ears, and AVP perfusion in cultured epithelial cells from rat endolymphatic sacs induced similar changes in this pathway signaling. Vestibular training, V2R antagonist mozavaptan, or PKA inhibitor H89 blunted these changes in the V2R-AQP2 pathway signaling while reducing rotatory stimulus– or DDAVP (a V2R agonist)-induced motion sickness in rats and dogs. Therefore, our results suggest that activation of the inner ear AVP-V2R-AQP2 signaling pathway is potentially involved in the development of motion sickness; thus, mozavaptan targeting AVP V2Rs in the inner ear may provide us with a new application option to reduce motion sickness.

SIGNIFICANCE STATEMENT

Motion sickness affects many people traveling or working. In the present study our results showed that activation of the inner ear arginine vasopressin-vaspopressin receptor 2 (V2R)-aquaporin 2 signaling pathway was potentially involved in the development of motion sickness and that blocking V2R with mozavaptan, a V2R antagonist, was much more effective in reducing motion sickness in both rat and dog; therefore, we demonstrated a new mechanism to underlie motion sickness and a new candidate drug to reduce motion sickness.




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The Endocannabinoid System Alleviates Pain in a Murine Model of Cancer-Induced Bone Pain [Drug Discovery and Translational Medicine]

Metastatic breast cancer is prevalent worldwide, and one of the most common sites of metastasis is long bones. Of patients with disease, the major symptom is pain, yet current medications fail to adequately result in analgesic efficacy and present major undesirable adverse effects. In our study, we investigate the potential of a novel monoacylglycerol lipase (MAGL) inhibitor, MJN110, in a murine model of cancer-induced bone pain. Literature has previously demonstrated that MAGL inhibitors function to increase the endogenous concentrations of 2-arachydonylglycerol, which then activates CB1 and CB2 receptors to inhibit inflammation and pain. We demonstrate that administration of MJN110 significantly and dose dependently alleviates spontaneous pain behavior during acute administration compared with vehicle control. In addition, MJN110 maintains its efficacy in a chronic-dosing paradigm over the course of 7 days without signs of receptor sensitization. In vitro analysis of MJN110 demonstrated a dose-dependent and significant decrease in cell viability and proliferation of 66.1 breast adenocarcinoma cells to a greater extent than KML29, an alternate MAGL inhibitor, or the CB2 agonist JWH015. Chronic administration of the compound did not appear to affect tumor burden, as evidenced by radiograph or histologic analysis. Together, these data support the application for MJN110 as a novel therapeutic for cancer-induced bone pain.

SIGNIFICANCE STATEMENT

Current standard of care for metastatic breast cancer pain is opioid-based therapies with adjunctive chemotherapy, which have highly addictive and other deleterious side effects. The need for effective, non–opioid-based therapies is essential, and harnessing the endogenous cannabinoid system is proving to be a new target to treat various types of pain conditions. We present a novel drug targeting the endogenous cannabinoid system that is effective at reducing pain in a mouse model of metastatic breast cancer to bone.




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Translational Pharmacokinetic-Pharmacodynamic Modeling for an Orally Available Novel Inhibitor of Epigenetic Regulator Enhancer of Zeste Homolog 2 [Drug Discovery and Translational Medicine]

PF06821497 has been identified as an orally available small-molecule enhancer of zeste homolog 2 inhibitor. The objectives of the present study were to characterize pharmacokinetic-pharmacodynamic-disease relationships of PF06821497 in xenograft mouse models with diffuse large B-cell lymphoma (Karpas422). An indirect-response model reasonably fit dose-dependent pharmacodynamic responses [histone H3 on lysine 27 (H3K27) me3 inhibition] with an unbound EC50 of 76 nM, whereas a signal-transduction model sufficiently fit dose-dependent disease responses (tumor growth inhibition) with an unbound tumor stasis concentration (Tsc) of 168 nM. Thus, effective concentration for 70% of maximal effect (EC70) for H3K27me3 inhibition was roughly comparable to Tsc, suggesting that 70% H3K27me3 inhibition could be required for tumor stasis. Consistently, an integrated pharmacokinetic-pharmacodynamic-disease model adequately describing tumor growth inhibition also suggested that ~70% H3K27me3 inhibition was associated with tumor stasis. Based on these results, we would propose that an EC70 estimate for H3K27me3 inhibition corresponding to tumor stasis could be considered a minimum target efficacious concentration of PF06821497 in cancer patients.

SIGNIFICANCE STATEMENT

Using a mathematical modeling approach, the quantitative relationships of an orally available anticancer small-molecule enhancer of zeste homolog 2 inhibitor, PF06821497, were characterized among pharmacokinetics, pharmacodynamic biomarker inhibition, and disease responses in nonclinical xenograft models with diffuse large B-cell lymphoma. The modeling results suggest that >70% histone H3 on lysine 27 (H3K27) me3 inhibition would be required for tumor stasis (i.e., 100% tumor growth inhibition). Accordingly, we would propose that an effective concentration for 70% of maximal effect estimate for H3K27me3 inhibition could be considered a minimum target efficacious concentration of PF06821497 in cancer patients.




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Pharmacological Characterization of Apraglutide, a Novel Long-Acting Peptidic Glucagon-Like Peptide-2 Agonist, for the Treatment of Short Bowel Syndrome [Drug Discovery and Translational Medicine]

Glucagon-like peptide-2 (GLP-2) agonists have therapeutic potential in clinical indications in which the integrity or absorptive function of the intestinal mucosa is compromised, such as in short bowel syndrome (SBS). Native hGLP-2, a 33–amino acid peptide secreted from the small intestine, contributes to nutritional absorption but has a very short half-life because of enzymatic cleavage and renal clearance and thus is of limited therapeutic value. The GLP-2 analog teduglutide (Revestive/Gattex; Shire Inc.) has been approved for use in SBS since 2012 but has a once-daily injection regimen. Pharmacokinetic (PK) and pharmacodynamic studies confirm that apraglutide, a novel GLP-2 analog, has very low clearance, long elimination half-life, and high plasma protein binding compared with GLP-2 analogs teduglutide and glepaglutide. Apraglutide and teduglutide retain potency and selectivity at the GLP-2 receptor comparable to native hGLP-2, whereas glepaglutide was less potent and less selective. In rat intravenous PK studies, hGLP-2, teduglutide, glepaglutide, and apraglutide had clearances of 25, 9.9, 2.8, and 0.27 ml/kg per minute, respectively, and elimination half-lives of 6.4, 19, 16, and 159 minutes, respectively. The unique PK profile of apraglutide administered via intravenous and subcutaneous routes was confirmed in monkey and minipig and translated into significantly greater in vivo pharmacodynamic activity, measured as small intestinal growth in rats. Apraglutide showed greater intestinotrophic activity than the other peptides when administered at less-frequent dosing intervals because of its prolonged half-life. We postulate that apraglutide offers several advantages over existing GLP-2 analogs and is an excellent candidate for the treatment of gastrointestinal diseases, such as SBS.

SIGNIFICANCE STATEMENT

Apraglutide is a potent and selective GLP-2 agonist with an extremely low clearance and prolonged elimination half-life, which differentiates it from teduglutide (the only approved GLP-2 agonist). The enhanced pharmacokinetics of apraglutide will benefit patients by enabling a reduced dosing frequency and removing the need for daily injections.




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A Mechanistic and Translational Pharmacokinetic-Pharmacodynamic Model of Abicipar Pegol and Vascular Endothelial Growth Factor Inhibition [Drug Discovery and Translational Medicine]

Abicipar pegol (abicipar) is a novel DARPin therapeutic and highly potent vascular endothelial growth factor (VEGF) inhibitor intended for the treatment of neovascular age-related macular degeneration (nAMD). Here we develop a translational pharmacokinetic/pharmacodynamic (PK/PD) model for abicipar to guide dosing regimens in the clinic. The model incorporated abicipar-VEGF binding kinetics, VEGF expression levels, and VEGF turnover rates to describe the ocular and systemic PK data collected from the vitreous, aqueous humor (AH), choroid, retina, and serum of rabbits after a 1-mg abicipar intravitreal (IVT) dose. The model was translated to humans using human-specific mechanistic parameters and refitted to human serum and AH concentrations from patients with diabetic macular edema and nAMD. The model was then used to simulate 8-, 12- (quarterly), and 16-week dosing intervals in the clinic. Simulations of 2 mg abicipar IVT at 8-week or quarterly dosing in humans indicates minimum steady-state vitreal concentrations are maintained above both in vitro IC50 and in vivo human IC50 values. The model predicted virtually complete VEGF inhibition for the 8-week and quarterly dosing schedule during the 52-week treatment period. In the 16-week schedule, clinically significant VEGF inhibition was maintained during the 52-week period. The model quantitatively described abicipar-VEGF target engagement leading to rapid reduction of VEGF and a long duration of VEGF inhibition demonstrating the clinical feasibility of up to a 16-week dosing interval. Abicipar is predicted to reduce IVT dosing compared with other anti-VEGF therapies with the potential to lessen patient treatment burden.

SIGNIFICANCE STATEMENT

Current anti-VEGF treatments for neovascular age-related macular degeneration require frequent (monthly) intravitreal injections and monitoring, which increases patient burden. We developed a mechanistic pharmakinetic/pharmadynamic model to describe the interaction between abicipar (a novel VEGF inhibitor) and VEGF to evaluate the duration of action. The model demonstrates extended abicipar-VEGF target engagement leading to clinical feasibility of up to a 16-week dosing interval. Our model predicted that abicipar 8-week and quarterly dosing schedules maintain virtually complete VEGF inhibition during the 52-week period.




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Protein Engineering in the Ubiquitin System: Tools for Discovery and Beyond [Review Articles]

Ubiquitin (UB) transfer cascades consisting of E1, E2, and E3 enzymes constitute a complex network that regulates a myriad of biologic processes by modifying protein substrates. Deubiquitinating enzymes (DUBs) reverse UB modifications or trim UB chains of diverse linkages. Additionally, many cellular proteins carry UB-binding domains (UBDs) that translate the signals encoded in UB chains to target proteins for degradation by proteasomes or in autophagosomes, as well as affect nonproteolytic outcomes such as kinase activation, DNA repair, and transcriptional regulation. Dysregulation of the UB transfer pathways and malfunctions of DUBs and UBDs play causative roles in the development of many diseases. A greater understanding of the mechanism of UB chain assembly and the signals encoded in UB chains should aid in our understanding of disease pathogenesis and guide the development of novel therapeutics. The recent flourish of protein-engineering approaches such as unnatural amino acid incorporation, protein semisynthesis by expressed protein ligation, and high throughput selection by phage and yeast cell surface display has generated designer proteins as powerful tools to interrogate cell signaling mediated by protein ubiquitination. In this study, we highlight recent achievements of protein engineering on mapping, probing, and manipulating UB transfer in the cell.

Significance Statement

The post-translational modification of proteins with ubiquitin alters the fate and function of proteins in diverse ways. Protein engineering is fundamentally transforming research in this area, providing new mechanistic insights and allowing for the exploration of concepts that can potentially be applied to therapeutic intervention.




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Biostratigraphy and evolution of Miocene Discoaster spp. from IODP Site U1338 in the equatorial Pacific Ocean

Assemblages of upper lower through upper Miocene Discoaster spp. have been quantified from Integrated Ocean Drilling Program (IODP) Site U1338 in the eastern equatorial Pacific Ocean. These assemblages can be grouped into five broad morphological categories: six-rayed with bifurcated ray tips, six-rayed with large central areas, six-rayed with pointed ray tips, five-rayed with bifurcated ray tips and five-rayed with pointed ray tips. Discoaster deflandrei dominates the assemblages prior to 15.8 Ma. The decline in abundance of D. deflandrei close to the early–middle Miocene boundary occurs together with the evolution of the D. variabilis group, including D. signus and D. exilis. Six-rayed discoasters having large central areas become a prominent member of the assemblages for a 400 ka interval in the late middle Miocene. Five- and six-rayed forms having pointed tips become prominent in the early late Miocene and show a strong antiphasing relationship with the D. variabilis group. Discoaster bellus completely dominates the Discoaster assemblages for a 400 ka interval in the middle late Miocene. Abundances of all discoasters, or discoasters at the species level, show only (surprisingly) weak correlations to carbonate contents or oxygen and carbon isotopes of bulk sediment when calculated over the entire sample interval.




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Discontinuation of RAAS Inhibition in Children with Advanced CKD

Background and objectives

Although renin-angiotensin-aldosterone system inhibition (RAASi) is a cornerstone in the treatment of children with CKD, it is sometimes discontinued when kidney function declines. We studied the reasons of RAASi discontinuation and associations between RAASi discontinuation and important risk markers of CKD progression and on eGFR decline in the Cardiovascular Comorbidity in Children with CKD study.

Design, setting, participants, & measurements

In this study, 69 children with CKD (67% male, mean age 13.7 years, mean eGFR 27 ml/min per 1.73 m2) who discontinued RAASi during prospective follow-up were included. Initial change in BP, albuminuria, and potassium after discontinuation were assessed (median time 6 months). Rate of eGFR decline (eGFR slope) during a median of 1.9 years before and 1.2 years after discontinuation were estimated using linear mixed effects modeling.

Results

Physician-reported reasons for RAASi discontinuation were increase in serum creatinine, hyperkalemia, and symptomatic hypotension. After discontinuation of RAASi, BP and albuminuria increased, whereas potassium decreased. eGFR declined more rapidly after discontinuation of RAASi (–3.9 ml/min per 1.73 m2 per year; 95% confidence interval, –5.1 to –2.6) compared with the slope during RAASi treatment (–1.5 ml/min per 1.73 m2 per year; 95% confidence interval, –2.4 to –0.6; P=0.005). In contrast, no change in eGFR slope was observed in a matched control cohort of patients in whom RAASi was continued.

Conclusions

Discontinuation of RAASi in children with CKD is associated with an acceleration of kidney function decline, even in advanced CKD.




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In Vitro Screening of the Open-Source Medicines for Malaria Venture Malaria and Pathogen Boxes To Discover Novel Compounds with Activity against Balamuthia mandrillaris [Susceptibility]

Balamuthia mandrillaris is an under-reported, pathogenic free-living amoeba that causes Balamuthia amoebic encephalitis (BAE) and cutaneous skin infections. Although cutaneous infections are not typically lethal, BAE with or without cutaneous involvement is usually fatal. This is due to the lack of drugs that are both efficacious and can cross the blood-brain barrier. We aimed to discover new leads for drug discovery by screening the open-source Medicines for Malaria Venture (MMV) Malaria Box and MMV Pathogen Box, with 800 compounds total. From an initial single point screen at 1 and 10 μM, we identified 54 hits that significantly inhibited the growth of B. mandrillaris in vitro. Hits were reconfirmed in quantitative dose-response assays and 23 compounds (42.6%) were confirmed with activity greater than miltefosine, the current standard of care.




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A Biosynthetic Platform for Antimalarial Drug Discovery [Chemistry; Biosynthesis]

Advances in synthetic biology have enabled the production of a variety of compounds using bacteria as a vehicle for complex compound biosynthesis. Violacein, a naturally occurring indole pigment with antibiotic properties, can be biosynthetically engineered in Escherichia coli expressing its nonnative synthesis pathway. To explore whether this synthetic biosynthesis platform could be used for drug discovery, here we have screened bacterially derived violacein against the main causative agent of human malaria, Plasmodium falciparum. We show the antiparasitic activity of bacterially derived violacein against the P. falciparum 3D7 laboratory reference strain as well as drug-sensitive and -resistant patient isolates, confirming the potential utility of this drug as an antimalarial agent. We then screen a biosynthetic series of violacein derivatives against P. falciparum growth. The varied activity of each derivative against asexual parasite growth points to the need to further develop violacein as an antimalarial. Towards defining its mode of action, we show that biosynthetic violacein affects the parasite actin cytoskeleton, resulting in an accumulation of actin signal that is independent of actin polymerization. This activity points to a target that modulates actin behavior in the cell either in terms of its regulation or its folding. More broadly, our data show that bacterial synthetic biosynthesis could become a suitable platform for antimalarial drug discovery, with potential applications in future high-throughput drug screening with otherwise chemically intractable natural products.




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Discordance between Etravirine Phenotype and Genotype-Based Predicted Phenotype for Subtype C HIV-1 from First-Line Antiretroviral Therapy Failures in South Africa [Antiviral Agents]

Etravirine (ETR) is a nonnucleoside reverse transcriptase inhibitor (NNRTI) used in treatment-experienced individuals. Genotypic resistance test-interpretation systems can predict ETR resistance; however, genotype-based algorithms are derived primarily from HIV-1 subtype B and may not accurately predict resistance in non-B subtypes. The frequency of ETR resistance among recombinant subtype C HIV-1 and the accuracy of genotypic interpretation systems were investigated. HIV-1LAI containing full-length RT from HIV-1 subtype C-positive individuals experiencing virologic failure (>10,000 copies/ml and >1 NNRTI resistance-associated mutation) were phenotyped for ETR susceptibility. Fold change (FC) was calculated against a composite 50% effective concentration (EC50) from treatment-naive individuals and three classifications were assigned: (i) <2.9-FC, susceptible; (ii) ≥2.9- to 10-FC, partially resistant; and (iii) >10-FC, fully resistant. The Stanford HIVdb-v8.4 was used for genotype predictions merging the susceptible/potential low-level and low-level/intermediate groups for 3 x 3 comparison. Fifty-four of a hundred samples had reduced ETR susceptibility (≥2.9-FC). The FC correlated with HIVdb-v8.4 (Spearman’s rho = 0.62; P < 0.0001); however, 44% of samples were partially (1 resistance classification difference) and 4% completely discordant (2 resistance classification differences). Of the 34 samples with an FC of >10, 26 were HIVdb-v8.4 classified as low-intermediate resistant. Mutations L100I, Y181C, or M230L were present in 27/34 (79%) of samples with an FC of >10 but only in 2/46 (4%) of samples with an FC of <2.9. No other mutations were associated with ETR resistance. Viruses containing the mutation K65R were associated with reduced ETR susceptibility, but 65R reversions did not increase ETR susceptibility. Therefore, genotypic interpretation systems were found to misclassify ETR susceptibility in HIV-1 subtype C samples. Modifications to genotypic algorithms are needed to improve the prediction of ETR resistance for the HIV-1 subtype C.




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New Drug-Discovery Assay Identifies Novel Mutant-EGFR Inhibitors [Drug Discovery]

The MaMTH-DS assay detected inhibitors of mutant EGFR in non–small cell lung cancer cells.




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[PERSPECTIVES] Discouraging Elective Genetic Testing of Minors: A Norm under Siege in a New Era of Genomic Medicine

Consistently, the field of genetic counseling has advocated that parents be advised to defer elective genetic testing of minors until adulthood to prevent a range of potential harms, including stigma, discrimination, and the loss of the child's ability to decide for him- or herself as an adult. However, consensus around the policy of "defer-when-possible" obscures the extent to which this norm is currently under siege. Increasingly, routine use of full or partial genome sequencing challenges our ability to control what is discovered in childhood or, when applied in a prenatal context, even before birth. The expansion of consumer-initiated genetic testing services challenges our ability to restrict what is available to minors. As the barriers to access crumble, medical professionals should proceed with caution, bearing in mind potential risks and continuing to assess the impact of genetic testing on this vulnerable population.




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Vista An Phu, over 100m2 - Discount price 4.6 billion

Vista An Phu, over 100m2 - Discount price 4.6 billion* 2BR, Tower 3, low floor, river view, 101.5m2 ______ Price 4.6 billion * 2BR, Tower 3, low floor, river view, 143m2________ Price 7.5 billion * 2BR Tower 3, low floor, pool view, 101.5m2 _______ Price 4.6 billion * 3BR Tower 1...




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Service apartment near BIS needs to rent 1 bedroom, discount due to corona epidemic

Serviced apartment for rent in district 2. Address: House No. 15, street 4, Thao Dien ward. This serviced apartment on 5.02 floor, area of 40 sqm can be used, including 1 bedroom, 1 bathroom (without bath), fully furnished, modern style and fully convenient. Living room with a lu...




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GARDEN VILLAS OF DISTRICT 9 SAIGON GARDEN, PRICE ONLY FROM 21 million VND/M2, DISCOUNT UP TO 18

-Location: Long Phuoc ward, district 9, Ho Chi Minh city. -Construction unit: Hung Thinh Icons. -Type: Garden villa. -Area: From 1.000 m2/lot. -Utilities: Landscape channel, tennis court Children's playground, marina, clubhouse, green park, etc. -Project legal: Long-term ownershi...




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Footage of Cancelled Prince of Persia: Redemption from 2012 Discovered

A gameplay trailer for a Prince of Persia reboot, called Prince of Persia: Redemption, was posted on YouTube in March 2012 and was discovered this week. 

The LinkedIn profile for the former Ubisoft employee Christophe Prelot revealed he worked on a cancelled Prince of Persia title from April 2010 to 2011 as a 3D level artist. The game was in development for the PlayStation 3, Xbox 360 and Windows PC. 

Ubisoft assistant technical director Marc-Andre Belleau in 2018 left a comment on the video asking, "Where did you get that?!"

View the video below:

Thanks ResetEra.

A life-long and avid gamer, William D'Angelo was first introduced to VGChartz in 2007. After years of supporting the site, he was brought on in 2010 as a junior analyst, working his way up to lead analyst in 2012. He has expanded his involvement in the gaming community by producing content on his own YouTube channel and Twitch channel dedicated to gaming Let's Plays and tutorials. You can contact the author at wdangelo@vgchartz.com or on Twitter @TrunksWD.

Full Article - https://www.vgchartz.com/article/443408/footage-of-cancelled-prince-of-persia-redemption-from-2012-discovered/