vivo

Packers are your best play in eliminator and survivor pools for Week 13

This week’s opponent, the Arizona Cardinals, gives Aaron Rodgers and the Packers a great chance to break their losing skid.




vivo

Titans are your best play in NFL eliminator and survivor pools for Week 14

Thursday night matchups are historically difficult on road teams like Jacksonville. Since 2016, the road team is 17-33 in these games, and that includes a 3-12 record in 2018.




vivo

Falcons are your best play in NFL eliminator and survivor pools for Week 15

Atlanta is on a five-game losing streak but their offense is scoring 2.3 points per drive in 2018, the fifth-highest rate in the NFL. That should be more than enough against Arizona's awful offense.




vivo

In Vivo Identification of Human Small Ubiquitin-like Modifier Polymerization Sites by High Accuracy Mass Spectrometry and an in Vitro to in Vivo Strategy

Ivan Matic
Jan 1, 2008; 7:132-144
Research




vivo

A Proteome-wide, Quantitative Survey of In Vivo Ubiquitylation Sites Reveals Widespread Regulatory Roles

Sebastian A. Wagner
Oct 1, 2011; 10:M111.013284-M111.013284
Research




vivo

A Tandem Affinity Tag for Two-step Purification under Fully Denaturing Conditions: Application in Ubiquitin Profiling and Protein Complex Identification Combined with in vivoCross-Linking

Christian Tagwerker
Apr 1, 2006; 5:737-748
Research




vivo

Dopamine transporter trafficking and Rit2 GTPase: Mechanism of action and in vivo impact [Neurobiology]

Following its evoked release, dopamine (DA) signaling is rapidly terminated by presynaptic reuptake, mediated by the cocaine-sensitive DA transporter (DAT). DAT surface availability is dynamically regulated by endocytic trafficking, and direct protein kinase C (PKC) activation acutely diminishes DAT surface expression by accelerating DAT internalization. Previous cell line studies demonstrated that PKC-stimulated DAT endocytosis requires both Ack1 inactivation, which releases a DAT-specific endocytic brake, and the neuronal GTPase, Rit2, which binds DAT. However, it is unknown whether Rit2 is required for PKC-stimulated DAT endocytosis in DAergic terminals or whether there are region- and/or sex-dependent differences in PKC-stimulated DAT trafficking. Moreover, the mechanisms by which Rit2 controls PKC-stimulated DAT endocytosis are unknown. Here, we directly examined these important questions. Ex vivo studies revealed that PKC activation acutely decreased DAT surface expression selectively in ventral, but not dorsal, striatum. AAV-mediated, conditional Rit2 knockdown in DAergic neurons impacted baseline DAT surface:intracellular distribution in DAergic terminals from female ventral, but not dorsal, striatum. Further, Rit2 was required for PKC-stimulated DAT internalization in both male and female ventral striatum. FRET and surface pulldown studies in cell lines revealed that PKC activation drives DAT-Rit2 surface dissociation and that the DAT N terminus is required for both PKC-mediated DAT-Rit2 dissociation and DAT internalization. Finally, we found that Rit2 and Ack1 independently converge on DAT to facilitate PKC-stimulated DAT endocytosis. Together, our data provide greater insight into mechanisms that mediate PKC-regulated DAT internalization and reveal unexpected region-specific differences in PKC-stimulated DAT trafficking in bona fide DAergic terminals.




vivo

Dopamine transporter trafficking and Rit2 GTPase: Mechanism of action and in vivo impact [Neurobiology]

Following its evoked release, dopamine (DA) signaling is rapidly terminated by presynaptic reuptake, mediated by the cocaine-sensitive DA transporter (DAT). DAT surface availability is dynamically regulated by endocytic trafficking, and direct protein kinase C (PKC) activation acutely diminishes DAT surface expression by accelerating DAT internalization. Previous cell line studies demonstrated that PKC-stimulated DAT endocytosis requires both Ack1 inactivation, which releases a DAT-specific endocytic brake, and the neuronal GTPase, Rit2, which binds DAT. However, it is unknown whether Rit2 is required for PKC-stimulated DAT endocytosis in DAergic terminals or whether there are region- and/or sex-dependent differences in PKC-stimulated DAT trafficking. Moreover, the mechanisms by which Rit2 controls PKC-stimulated DAT endocytosis are unknown. Here, we directly examined these important questions. Ex vivo studies revealed that PKC activation acutely decreased DAT surface expression selectively in ventral, but not dorsal, striatum. AAV-mediated, conditional Rit2 knockdown in DAergic neurons impacted baseline DAT surface:intracellular distribution in DAergic terminals from female ventral, but not dorsal, striatum. Further, Rit2 was required for PKC-stimulated DAT internalization in both male and female ventral striatum. FRET and surface pulldown studies in cell lines revealed that PKC activation drives DAT-Rit2 surface dissociation and that the DAT N terminus is required for both PKC-mediated DAT-Rit2 dissociation and DAT internalization. Finally, we found that Rit2 and Ack1 independently converge on DAT to facilitate PKC-stimulated DAT endocytosis. Together, our data provide greater insight into mechanisms that mediate PKC-regulated DAT internalization and reveal unexpected region-specific differences in PKC-stimulated DAT trafficking in bona fide DAergic terminals.




vivo

Cancer survivors' experiences with financial toxicity

(Wiley) A recent Psycho-Oncology analysis of published studies found that few cancer survivors received financial information support from healthcare facilities during their initial treatment, even though cancer-related financial toxicity has multiple impacts on survivors' health and quality of life.




vivo

Comparing opioid-related deaths among cancer survivors, general population

(JAMA Network) Death certificate data were used to compare the rate of opioid-related deaths in the US among cancer survivors with that of the general population from 2006 through 2016. Whether opioid-associated deaths in cancer survivors, who are often prescribed opioids for cancer-related pain, are rising at the same rate as in the general population is unknown.




vivo

Quantitative proteomics of human heart samples collected in vivo reveal the remodeled protein landscape of dilated left atrium without atrial fibrillation

Nora Linscheid
Apr 14, 2020; 0:RA119.001878v1-mcp.RA119.001878
Research




vivo

Does 2-FDG-PET Accurately Reflect Quantitative In vivo Glucose Utilization?

2-Deoxy-2-[18F]fluoro-D-glucose (2-FDG) with positron emission tomography (2-FDG-PET) is undeniably useful in the clinic, among other uses, to monitor change over time using the 2-FDG standardized uptake values (SUV) metric. This report suggests some potentially serious caveats for this and related roles for 2-FDG PET. Most critical is the assumption that there is an exact proportionality between glucose metabolism and 2-FDG metabolism, called the lumped constant, LC. This report describes that LC is not constant for a specific tissue and may be variable before and after disease treatment. The purpose of this work is not to deny the clinical value of 2-FDG PET; it is a reminder that when one extends the use of an appropriately qualified imaging method, new observations may arise and further validation would be necessary. Current understanding of glucose-based energetics in vivo is based on the quantification of glucose metabolic rates with 2-FDG PET, a method that permits the non-invasive assessment in various human disorders. However, 2-FDG is only a good substrate for facilitated-glucose transporters (GLUTs) but not for sodium-dependent glucose co-transporters (SGLTs), which have recently been shown to be distributed in multiple human tissues. Thus, the GLUT-mediated in vivo glucose utilization measured by 2-FDG PET would be blinded to the potentially substantial role of functional SGLTs in glucose transport and utilization. Therefore, in these circumstances the 2-FDG LC used to quantify in vivo glucose utilization should not be expected to remain constant. 2-FDG LC variations have been especially significant in tumors, particularly at different stages of cancer development, affecting the accuracy of quantitative glucose measures and potentially limiting the prognostic value of 2-FDG, as well as its accuracy in monitoring treatments. SGLT-mediated glucose transport can be estimated using α-methyl-4-deoxy-4-[18F]fluoro-D-glucopyranoside (Me-4FDG). Utilizing both 2-FDG and Me-4FDG should provide a more complete picture of glucose utilization via both GLUT and SGLT transporters in health and disease stages. Given the widespread use of 2-FDG PET to infer glucose metabolism, appreciating the potential limitations of 2-FDG as a surrogate for glucose metabolic rate and the potential reasons for variability in LC is relevant. Even when the readout for the 2-FDG PET study is only an SUV parameter, variability in LC is important, particularly if it changes over the course of disease progression (e.g., an evolving tumor).




vivo

In vivo instability of 177Lu-DOTATATE during peptide receptor radionuclide therapy

Peptide receptor radiotherapy using 177Lu-labeled somatostatin ligand analogs is a well-established treatment for neuroendocrine tumors (NET), with 177Lu-DOTATATE having acquired marketing authorization in Europe and the USA. The investigation of the pharmacokinetics of those radiopharmaceuticals in vivo in humans is crucial for personalized treatment management and understanding of treatment effects. It requires input data on the in vivo stability of the radiopharmaceuticals in blood and plasma. The work presented here is devoted to the investigation of in vivo stability of 177Lu-DOTATATE in humans affected by NET. Unexpectedly, fast metabolism of the radiopharmaceutical was observed, with fraction of intact 177Lu-DOTATATE in plasma decreasing rapidly to 23±5% (mean ± SD) at 24 h and 1.7±0.9% at 96 h after injection.




vivo

Digital Solid-State SPECT/CT Quantitation of Absolute 177Lu-Radiotracer Concentration: In Vivo/In Vitro Validation

The accuracy of lutetium-177 (177Lu) radiotracer concentration measurements using quantitative clinical software was determined by comparing in vivo results for a digital solid-state cadmium-zinc-telluride SPECT/CT (single photon emission computed tomography / x-ray computed tomography) system to in vitro sampling. First, image acquisition parameters were assessed for an International Electrotechnical Commission (IEC) body phantom emulating clinical count rates loaded with a "lung" insert and 6 hot spheres with a 12:1 target-to-background ratio of 177Lu solution. Then, the data of 28 whole-body SPECT/CT scans of 7 patients who underwent 177Lu prostate membrane antigen (177Lu-PSMA) radioligand therapy was retrospectively analyzed. Three users analyzed SPECT/CT images for in vivo urinary bladder radiotracer uptake using quantitative software (Q.Metrix, GE Healthcare). In vitro radiopharmaceutical concentrations were calculated using urine sampling obtained immediately after each scan, scaled to standardized uptake values (SUVs). Any in vivo/in vitro identity relations were determined by linear regression (ideally slope=1, intercept=0), within a 95 % confidence interval (CI). Phantom results demonstrated lower quantitative error for acquisitions using the 113 keV 177Lu energy peak rather than including the 208 keV peak, given that only low-energy collimation was available in this camera configuration. In the clinical study, 24 in vivo/in vitro pairs were eligible for further analysis, having rejected 4 as outliers (via Cook’s distance calculations). All linear regressions (R2 ≥ 0.92, P<0.0001) provided identity in vivo/in vitro relations (95 % CI), with SUV averages from all users giving a slope of 1.03±0.09, an intercept of –0.25±0.64 g/mL, and an average residual difference of 20.4 %. Acquiring with the lower energy 177Lu energy peak, solid-state SPECT/CT imaging provides an accuracy to within ~20 % for in vivo urinary bladder radiotracer concentrations. This non-invasive in vivo quantitation method can potentially improve diagnosis, improve patient management and treatment response assessment, and provide data essential to 177Lu dosimetry.




vivo

Quantitative proteomics of human heart samples collected in vivo reveal the remodeled protein landscape of dilated left atrium without atrial fibrillation [Research]

Genetic and genomic research has greatly advanced our understanding of heart disease. Yet, comprehensive, in-depth, quantitative maps of protein expression in hearts of living humans are still lacking. Using samples obtained during valve replacement surgery in patients with mitral valve prolapse (MVP), we set out to define inter-chamber differences, the intersect of proteomic data with genetic or genomic datasets, and the impact of left atrial dilation on the proteome of patients with no history of atrial fibrillation (AF).  We collected biopsies from right atria (RA), left atria (LA) and left ventricle (LV) of seven male patients with mitral valve regurgitation with dilated LA but no history of AF. Biopsy samples were analyzed by high-resolution mass spectrometry (MS), where peptides were pre-fractionated by reverse phase high-pressure liquid chromatography prior to MS measurement on a Q-Exactive-HF Orbitrap instrument. We identified 7,314 proteins based on 130,728 peptides. Results were confirmed in an independent set of biopsies collected from three additional individuals. Comparative analysis against data from post-mortem samples showed enhanced quantitative power and confidence level in samples collected from living hearts. Our analysis, combined with data from genome wide association studies suggested candidate gene associations to MVP, identified higher abundance in ventricle for proteins associated with cardiomyopathies and revealed the dilated LA proteome, demonstrating differential representation of molecules previously associated with AF, in non-AF hearts. This is the largest dataset of cardiac protein expression from human samples collected in vivo. It provides a comprehensive resource that allows insight into molecular fingerprints of MVP and facilitates novel inferences between genomic data and disease mechanisms. We propose that over-representation of proteins in ventricle is consequent not to redundancy but to functional need, and conclude that changes in abundance of proteins known to associate with AF are not sufficient for arrhythmogenesis.




vivo

A Polymorphism in the Glucocorticoid Receptor Gene, Which Decreases Sensitivity to Glucocorticoids In Vivo, Is Associated With Low Insulin and Cholesterol Levels

Elisabeth F.C. van Rossum
Oct 1, 2002; 51:3128-3134
Genetics




vivo

Intramyocellular triglyceride content is a determinant of in vivo insulin resistance in humans: a 1H-13C nuclear magnetic resonance spectroscopy assessment in offspring of type 2 diabetic parents

G Perseghin
Aug 1, 1999; 48:1600-1606
Articles




vivo

TSPO Versus P2X7 as a Target for Neuroinflammation: An In Vitro and In Vivo Study

Neuroinflammation is important in amyotrophic lateral sclerosis (ALS). The P2X7 receptor (P2X7R) is a promising target for neuroinflammation. The objective of this study was to compare 18F-DPA714, a second-generation translocator protein tracer, with 11C-JNJ717, a novel P2X7R tracer, in vitro and in vivo in ALS. Methods: For the in vitro portion of the study, autoradiography with 18F-DPA714 and 11C-JNJ717 was performed on human ALS brain sections in comparison to immunofluorescence with Iba1 and GFAP. For the in vivo portion, 3 male patients with early-stage ALS (59.3 ± 7.2 y old) and 6 healthy volunteers (48.2 ± 16.5 y old, 2 men and 4 women) underwent dynamic PET/MR scanning with 18F-DPA714 and 11C-JNJ717. Volume-of-distribution images were calculated using Logan plots and analyzed on a volume-of-interest basis. Results: Autoradiography showed no difference in 11C-JNJ717 binding but did show increased 18F-DPA714 binding in the motor cortex correlating with Iba1 expression (glial cells). Similar findings were observed in vivo, with a 13% increase in 18F-DPA714 binding in the motor cortex. Conclusion: In symptomatic ALS patients, 18F-DPA714 showed increased signal whereas 11C-JNJ717 was not elevated.




vivo

Study: Opioid overdose 14 times more likely in general public than cancer survivors

Cancer survivors have a lower risk for a fatal opioid overdose -- from prescription pain medications or illegal drugs -- than those without the disease, an analysis published Thursday by JAMA Oncology shows.




vivo

Along With Grief, 9/11 Survivors Find Resolve

John Duffy lost 67 of his colleagues at the firm of Keefe, Bruyette & Woods six years ago during the Sept. 11, 2001, terrorist attacks. Among the dead was Duffy's son Christopher. The investment banking firm, located in the South Tower of the World Trade Center, was among the companies hit hardes...




vivo

'I've Had a Lot of Survivor's Guilt': Columbine High's Former Principal on Healing His Community

Frank DeAngelis, who was the principal of Columbine High School from 1996-2014, talks about the steps he took to heal students and staff in the wake of the school shooting.




vivo

Grace Darling participating in the rescue of survivors from the shipwrecked Forfarshire in 1838 off the Farne Islands, coast of Northumberland. Photograph after W.B. Scott.

[19--?]




vivo

Statistical inference for partially observed branching processes with application to cell lineage tracking of in vivo hematopoiesis

Jason Xu, Samson Koelle, Peter Guttorp, Chuanfeng Wu, Cynthia Dunbar, Janis L. Abkowitz, Vladimir N. Minin.

Source: The Annals of Applied Statistics, Volume 13, Number 4, 2091--2119.

Abstract:
Single-cell lineage tracking strategies enabled by recent experimental technologies have produced significant insights into cell fate decisions, but lack the quantitative framework necessary for rigorous statistical analysis of mechanistic models describing cell division and differentiation. In this paper, we develop such a framework with corresponding moment-based parameter estimation techniques for continuous-time, multi-type branching processes. Such processes provide a probabilistic model of how cells divide and differentiate, and we apply our method to study hematopoiesis , the mechanism of blood cell production. We derive closed-form expressions for higher moments in a general class of such models. These analytical results allow us to efficiently estimate parameters of much richer statistical models of hematopoiesis than those used in previous statistical studies. To our knowledge, the method provides the first rate inference procedure for fitting such models to time series data generated from cellular barcoding experiments. After validating the methodology in simulation studies, we apply our estimator to hematopoietic lineage tracking data from rhesus macaques. Our analysis provides a more complete understanding of cell fate decisions during hematopoiesis in nonhuman primates, which may be more relevant to human biology and clinical strategies than previous findings from murine studies. For example, in addition to previously estimated hematopoietic stem cell self-renewal rate, we are able to estimate fate decision probabilities and to compare structurally distinct models of hematopoiesis using cross validation. These estimates of fate decision probabilities and our model selection results should help biologists compare competing hypotheses about how progenitor cells differentiate. The methodology is transferrable to a large class of stochastic compartmental and multi-type branching models, commonly used in studies of cancer progression, epidemiology and many other fields.




vivo

A novel slow (< 1 Hz) oscillation of neocortical neurons in vivo: depolarizing and hyperpolarizing components

M Steriade
Aug 1, 1993; 13:3252-3265
Articles




vivo

Researcher Identifies the Last Known Survivor of the Transatlantic Slave Trade

Matilda McCrear was just 2 when she was captured and brought to Alabama on the "Clotilda"




vivo

Growth of Extremely Preterm Survivors From Birth to 18 Years of Age Compared With Term Controls

Children born at very low birth weights have significant catch-up weight gain but differences in height remain. Their BMI, however, tends not to be higher than expected. Data are lacking regarding representative cohorts, defined by gestation and compared with contemporaneous controls.

In a geographic cohort of extremely preterm participants followed until age 18, compared with term controls, weight differences diminish over time, and height differences persist. BMI at age 18 is similar. Height at age 2 is a better predictor of final height than midparental height. (Read the full article)




vivo

Long-term Cardiovascular Outcomes in Survivors of Kawasaki Disease

Kawasaki disease (KD) results in coronary aneurysm formation and an increased risk of cardiovascular complications. Modern treatment of acute KD with intravenous immunoglobulin substantially reduces the rate of acute aneurysm formation.

This study reveals that long-term cardiovascular outcomes for KD patients in the current era are not significantly different than matched controls without KD. Late cardiovascular complications are almost exclusively seen in patients with persistent coronary aneurysms. (Read the full article)




vivo

Mental Health of Extremely Low Birth Weight Survivors in Their 30s

Little is known about the mental health of extremely low birth weight survivors in their 30s. It is also unclear whether being born small for gestational age or being exposed to antenatal corticosteroids increases risk in this group.

In their 30s, extremely low birth weight survivors are less likely to have substance problems but are at elevated risk for other psychiatric disorders. Those born small for gestational age are at higher risk, but those exposed to antenatal corticosteroids are at the greatest risk of all. (Read the full article)




vivo

In Vitro and In Vivo Characterization of Potent Antileishmanial Methionine Aminopeptidase-1 Inhibitors [Experimental Therapeutics]

Leishmania major is the causative agent of cutaneous leishmaniasis (CL). No human vaccine is available for CL and current drug regimens present several drawbacks such as emerging resistance, severe toxicity, medium effectiveness, and/or high cost. Thus, the need for better treatment options against CL is a priority. In the present study, we validate the enzyme methionine aminopeptidase-1 (MetAP1), a metalloprotease that catalyzes the removal of N-terminal methionine from peptides and proteins, as a chemotherapeutic target against CL infection. The in vitro antileishmanial activity of eight novel MetAP1 inhibitors (OJT001-OJT008) were investigated. Three compounds OJT006, OJT007, and OJT008 demonstrated potent anti-proliferative effect in macrophages infected with L. major amastigotes and promastigotes at submicromolar concentrations, with no cytotoxicity against host cells. Importantly, the leishmanicidal effect was diminished by almost 10-fold in transgenic L. major promastigotes overexpressing MetAP1LM in comparison to wild-type promastigotes. Furthermore, the in vivo activity of OJT006, OJT007, and OJT008 were investigated in L. major-infected BALB/c mice. In comparison to the control group, OJT008 significantly decreased footpad parasite load by 86%, and exhibited no toxicity against in treated mice. We propose MetAP1 inhibitor OJT008 as a potential chemotherapeutic candidate against CL infection caused by L. major infection.




vivo

ZN148 - a modular synthetic metallo-{beta}-lactamase inhibitor reverses carbapenem-resistance in Gram-negative pathogens in vivo [Experimental Therapeutics]

Carbapenem-resistant Gram-negative pathogens are a critical public health threat and there is an urgent need for new treatments. Carbapenemases (β-lactamases able to inactivate carbapenems) have been identified in both serine β-lactamase (SBL) and metallo β-lactamase (MBL) families. The recent introduction of SBL carbapenemase-inhibitors has provided alternative therapeutic options. Unfortunately, there are no approved inhibitors of MBL-mediated carbapenem-resistance and treatment options for infections caused by MBL-producing Gram-negatives are limited. Here, we present ZN148, a zinc-chelating MBL-inhibitor capable of restoring the bactericidal effect of meropenem and in vitro clinical susceptibility to carbapenems in >98% of a large international collection of MBL-producing clinical Enterobacterales strains (n=234). Moreover, ZN148 was able to potentiate the effect of meropenem against NDM-1-producing Klebsiella pneumoniae in a murine neutropenic peritonitis model. ZN148 showed no inhibition of the human zinc-containing enzyme glyoxylase II at 500 μM and no acute toxicity was observed in an in vivo mouse model with cumulative dosages up to 128 mg/kg. Biochemical analysis showed a time-dependent inhibition of MBLs by ZN148 and removal of zinc ions from the active site. Addition of exogenous zinc after ZN148 exposure only restored MBL activity by ~30%, suggesting an irreversible mechanism of inhibition. Mass-spectrometry and molecular modelling indicated potential oxidation of the active site Cys221 residue. Overall, these results demonstrate the therapeutic potential of a ZN148-carbapenem combination against MBL-producing Gram-negative pathogens and that ZN148 is a highly promising MBL inhibitor, capable of operating in a functional space not presently filled by any clinically approved compound.




vivo

In vitro and in vivo study on the synergistic effect of minocycline and azoles against pathogenic fungi [Susceptibility]

In vitro and in vivo interactions of minocycline and azoles including itraconazole, voriconazole, and posaconazole against filamentous pathogenic fungi were investigated. A total of 56 clinical isolates were studied in vitro via broth microdilution checkerboard technique, including 20 strains of Aspergillus fumigatus, 7 strains of A. flavus, 16 strains of Exophiala dermatitidis, 10 strains of Fusarium solani and 3 strain s of F. oxysporum. The results revealed that minocycline individually did not exhibit any significant antifungal activity against all tested strains. However, favorable synergy of minocycline with itraconazole, voriconazole, or posaconazole were observed against 34 (61%), 28 (50%), and 38 (69%) isolates, respectively, including azole resistant A. fumigatus and Fusarium spp. with inherently high MICs of azoles. Synergistic combinations resulted in 4 fold to 16-fold reduction of effective MICs of minocycline and azoles. No antagonism was observed. In vivo effect of minocycline-azole combinations were evaluated by survival assay in Galleria mellonella model infected with E. dermatitidis strain BMU00034, F. solani strain FS9, A. fumigatus strain AF293, AFR1 and AFR2 . Minocycline acted synergistically with azoles and significantly increased larvae survival in all isolates (P<0.001), including azole resistant A. fumigatus and azole-inactive Fusarium spp.. In conclusion, the results suggested that minocycline combined with azoles may help to enhance the antifungal susceptibilities of azoles against pathogenic fungi and had the potential to overcome azole resistance issues.




vivo

The Added Value of Longitudinal Imaging for Preclinical In vivo Efficacy Testing of Therapeutic Compounds against Cerebral Cryptococcosis [Experimental Therapeutics]

Brain infections with Cryptococcus neoformans are associated with significant morbidity and mortality. Cryptococcosis typically presents as meningoencephalitis or fungal mass lesions called cryptococcomas. Despite frequent in vitro discoveries of promising novel antifungals, the clinical need for drugs that can more efficiently treat these brain infections remains. A crucial step in drug development is the evaluation of in vivo drug efficacy in animal models. This mainly relies on survival studies or post-mortem analyses in large groups of animals, but these techniques only provide information on specific organs of interest at predefined time points. In this proof-of-concept study, we validated the use of non-invasive preclinical imaging to obtain longitudinal information on the therapeutic efficacy of amphotericin B or fluconazole monotherapy in meningoencephalitis and cryptococcoma mouse models. Bioluminescence imaging (BLI) enabled the rapid in vitro and in vivo evaluation of drug efficacy while complementary high-resolution anatomical information obtained by magnetic resonance imaging (MRI) of the brain allowed a precise assessment of the extent of infection and lesion growth rates. We demonstrated a good correlation between both imaging readouts and the fungal burden in various organs. Moreover, we identified potential pitfalls associated with the interpretation of therapeutic efficacy based solely on post-mortem studies, demonstrating the added value of this non-invasive dual imaging approach compared to standard mortality curves or fungal load endpoints. This novel preclinical imaging platform provides insights in the dynamic aspects of the therapeutic response and facilitates a more efficient and accurate translation of promising antifungal compounds from bench to bedside.




vivo

Experimentally engineered mutations in a ubiquitin hydrolase, UBP-1, modulate in vivo susceptibility to artemisinin and chloroquine in Plasmodium berghei. [Mechanisms of Resistance]

As resistance to artemisinins (current frontline drugs in malaria treatment) emerges in south East Asia, there is an urgent need to identify the genetic determinants and understand the molecular mechanisms underpinning such resistance. Such insights could lead to prospective interventions to contain resistance and prevent the eventual spread to other malaria endemic regions. Artemisinin reduced susceptibility in South East Asia (SEA) has been primarily linked to mutations in P. falciparum Kelch-13, which is currently widely recognised as a molecular marker of artemisinin resistance. However, 2 mutations in a ubiquitin hydrolase, UBP-1, have been previously associated with artemisinin reduced susceptibility in a rodent model of malaria and some cases of UBP-1 mutation variants associating with artemisinin treatment failure have been reported in Africa and SEA. In this study, we have employed CRISPR-Cas9 genome editing and pre-emptive drug pressures to test these artemisinin susceptibility associated mutations in UBP-1 in P. berghei sensitive lines in vivo. Using these approaches, we have shown that the V2721F UBP-1 mutation results in reduced artemisinin susceptibility, while the V2752F mutation results in resistance to chloroquine and moderately impacts tolerance to artemisinins. Genetic reversal of the V2752F mutation restored chloroquine sensitivity in these mutant lines while simultaneous introduction of both mutations could not be achieved and appears to be lethal. Interestingly, these mutations carry a detrimental growth defect, which would possibly explain their lack of expansion in natural infection settings. Our work has provided independent experimental evidence on the role of UBP-1 in modulating parasite responses to artemisinin and chloroquine under in vivo conditions.




vivo

In vitro and in vivo antibiotic capacity of two host defence peptides [Mechanisms of Action]

Two non-amidated host defence peptides named Pin2[G] and FA1 were evaluated against three types of pathogenic bacteria; two isolated from diabetic foot ulcer patients, Staphylococcus aureus UPD13 and Pseudomonas aeruginosa UPD3, and another from a commercial collection, Salmonella enterica serovar Typhimurium (ATCC 14028). In vitro experiments showed that the antimicrobial performance of the synthetic peptides, Pin2[G] and FA1, was modest, although FA1 was more effective than Pin2[G]. In contrast Pin2[G] had superior in vivo anti-infective activity to FA1 in rabbit wound infections by the diabetic foot ulcer pathogens S. aureus UPD13 and P. aeruginosa UPD3. Indeed, Pin2[G] reduced bacterial colony counts of both S. aureus UPD13 and P. aeruginosa UPD3 by >100,000-fold after 48-72 h on skin wounds of infected rabbits, while in similar infected wounds, FA1 had no major effects at 72-96 h of treatment. Ceftriaxone was equally effective vs. Pseudomonas but less effective vs. S. aureus infections. Additionally, the two peptides were evaluated in mice against intragastrically inoculated S. enterica ser. Typhimurium (ATCC 14028). Only Pin2[G], at 0.56 mg/kg, was effective in reducing systemic (liver) infection by >67-fold, equivalent to the effect of treatment with levofloxacin. Pin2[G] showed superior immunomodulatory activity in increasing chemokine production by a human bronchial cell line and suppressing poly(IC)-induced pro-inflammatory IL6 production. These data showed that the in vitro antimicrobial activity of these peptides was not correlated with their in vivo anti-infective activity, and suggest that other factors such as immunomodulatory activity were more important.




vivo

Ogilvy-Vivo spat puts the spotlight back on plagiarism in advertising

The real challenge with regulations is that of implementation and compliance.




vivo

Domestic Violence Survivors Receive More Than 100 Prepaid Phones

Attorney General highlights domestic violence awareness amid emergency orders  Attorney General Kathy Jennings and the Delaware Coalition Against Domestic Violence announced Monday that more than 100 cell phones with prepaid calls, texts, and data will be made available to Delaware domestic violence survivors as the result of a public-private-nonprofit collaboration between the Delaware Department of Justice, the […]




vivo

Samsung, Xiaomi, Oppo and vivo set to restart manufacturing in India

After implementing a countrywide lockdown in March due to the COVID-19 pandemic, the Indian government has begun to slowly lift its restrictions. These measures forced manufacturers like Samsung, Xiaomi, Oppo and vivo to temporarily suspend their smartphone production but with the eased restrictions all four are getting back to normal working conditions. Samsung Noida factory Samsung India issued a statement where it confirmed smartphone production in its Noida factory has already been restarted in limited capacity. Xiaomi also confirmed its manufacturing partner Foxconn has been...




vivo

vivo G1 5G introduced in China as the enterprise edition of the S6 5G

Back in March, vivo introduced its S6 5G, a midrange 5G phone with a 6.44-inch AMOLED display, quad cameras and the Exynos 980 chipset at the helm. Now the manufacturer unveiled the nearly identical vivo G1 5G, targeted at government and enterprise clients. The G1 5G offers a tweaked dual-domain system with separate work and personal environments that can house independent apps and content which in theory, eliminates the need to carry two phones. vivo is also ready to further customize the phone's interface based on the client's needs with proprietary apps and other tweaks....




vivo

Vivo iQOO Z1 earns its 3C certification

MediaTek and vivo have been entangled in a rather quickly-developing plotline, during the last couple of days. It revolves around the announcement of the Dymensity 1000+ chipset, followed immediately by various hints from vivo of an ambassador phone for said chipset - the iQOO Z1. Merely hours later, a mysterious vivo phone, bearing the model number V1986A, has popped-up on the 3C certification authority website. Putting two and two together, this is likely the iQOO Z1, which appears to be heading towards and imminent release. The document confirms 5G support on the phone, as well...




vivo

Vivo Indias Nipun Marya talks about how the company is arming the frontline workers with protective equipment




vivo

Unable to Overcome Impact Of Tragedy: Aurangabad Train Accident Survivor

A survivor of the Aurangabad train tragedy says that the disturbing images of the death of his companions in front of his eyes were haunting him and left him with the mental trauma that he will never...




vivo

"He Hired A Hitman To Kill Me": A Human Trafficking Survivor's Viral Post

It has been over 16 year since Harold D'Souza arrived in the United States. He wanted to build a better life for himself and his family in the land of opportunities. Instead, Mr D'Souza ended up...




vivo

Spotlight on Alumni: Nepal Chapter Raises Funds for Tsunami Survivors, Street Children, and Fosters International Ties with Alumni

Spotlight on Alumni: Nepal Chapter Raises Funds for Tsunami Survivors, Street Children, and Fosters International Ties with Alumni

Between raising funds for victims of the 2004 Asian tsunami, helping support educational programs for street children, and forging a sister-chapter relationship with alumni in Australia, the EWCA Nepal Alumni Chapter in Kathmandu has been busy carrying out the Center’s mission in South Asia.




vivo

Rape survivor left with huge legal bill after losing court case against cops

Businesswoman and activist Andisiwe “Andy” Kawa sued police for damages after accusing them of failing to find her during a 15-hour rape she endured in 2010 but lost the case.




vivo

They beat the coronavirus, but stigma still haunts Britain’s elderly Covid-19 survivors

From resounding applause to ostracisation and isolation.That is essentially...




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They beat the coronavirus, but stigma still haunts Britain’s elderly Covid-19 survivors

From resounding applause to ostracisation and isolation.That is essentially the journey Lt. Cmdr. Robert Embleton, who served 34 years in Britain’s Royal Navy, took by ambulance when discharged from Derriford Hospital in Plymouth, southwestern England, on April 8 following his near-month sickness with Covid-19.Arriving at his retirement home, he immediately went into self-isolation with his wife of 55 years, Jean, who has shown no symptoms of the virus. Soon after, Embleton realised he was…




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Covid-19 survivors - SCMP series

A series exploring the different experiences of recovered Covid-19 patients around the world. 1. Life as a coronavirus patient in Wuhan during its darkest hour A teacher’s story in the first of a series exploring the experiences of Covid-19 survivors from around the world. 2. Musician recounts horror from Covid-19 bar cluster Mark Anthony Balcueva struggled to breathe and had to be put on a cocktail of drugs, with only the thought of his daughter back in the Philippines keeping him alive. …




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Coronavirus survivors: they said we brought the plague to Indonesia, say country’s first patients

Ratri Anindyajati had plenty of things to worry about when she, her sister and her mother became the first three people in Indonesia to catch the coronavirus. Little did she know that personal abuse and social stigma would be among them.But that was exactly what came her way after President Joko “Jokowi” Widodo revealed to a stunned nation on March 2 that Indonesia had recorded its first two infections. Though he did not name the victims, their details soon leaked out; Anindyajati’s younger…




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Coronavirus survivors: Covid-19 felt worse than when I was shot, says Muay Thai camp owner who attended Lumpinee fight

The night of March 6, 2020, started much like every other night for boxing camp owner Pitak Kaewprapol – with a visit to a fight.Pitak and thousands of other Muay Thai fans had packed the New Lumpinee Boxing Stadium in Bangkok to watch an evening of kick-boxing, ignoring a government order just three days earlier requiring large gatherings to be cancelled or postponed.Like many others among the crowd of fans, tourists, celebrities, trainers and promoters who packed the 5,000-capacity stadium,…




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Coronavirus survivors: aged 93, this Indian man did everything with his wife. Including getting Covid-19

When 93-year-old Thomas Abraham was being treated for Covid-19 in the intensive care unit of a hospital in Kottayam, southern India, the one thing he missed was making black coffee for his wife, Mariyamma, 88.He need not have worried, the two would soon be having their morning cuppa together again – Mariyamma had contracted the disease too and both were being treated in the same hospital.“[At first] we were in separate wards but when both of us started missing each other, the doctors moved us…