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1.
Int J Mol Sci ; 25(4)2024 Feb 07.
Artigo em Inglês | MEDLINE | ID: mdl-38396680

RESUMO

Virtual screening of large chemical libraries is essential to support computer-aided drug development, providing a rapid and low-cost approach for further experimental validation. However, existing computational packages are often for specialised users or platform limited. Previously, we developed VSpipe, an open-source semi-automated pipeline for structure-based virtual screening. We have now improved and expanded the initial command-line version into an interactive graphical user interface: VSpipe-GUI, a cross-platform open-source Python toolkit functional in various operating systems (e.g., Linux distributions, Windows, and Mac OS X). The new implementation is more user-friendly and accessible, and considerably faster than the previous version when AutoDock Vina is used for docking. Importantly, we have introduced a new compound selection module (i.e., spatial filtering) that allows filtering of docked compounds based on specified features at the target binding site. We have tested the new VSpipe-GUI on the Hepatitis C Virus NS3 (HCV NS3) protease as the target protein. The pocket-based and interaction-based modes of the spatial filtering module showed efficient and specific selection of ligands from the virtual screening that interact with the HCV NS3 catalytic serine 139.


Assuntos
Hepatite C , Software , Humanos , Proteínas/química , Sítios de Ligação , Hepacivirus , Ligantes , Interface Usuário-Computador , Simulação de Acoplamento Molecular
2.
Sci Rep ; 14(1): 3357, 2024 02 09.
Artigo em Inglês | MEDLINE | ID: mdl-38336906

RESUMO

Mutations in the KCNT1 potassium channel cause severe forms of epilepsy which are poorly controlled with current treatments. In vitro studies have shown that KCNT1-epilepsy mutations are gain of function, significantly increasing K+ current amplitudes. To investigate if Drosophila can be used to model human KCNT1 epilepsy, we generated Drosophila melanogaster lines carrying human KCNT1 with the patient mutation G288S, R398Q or R928C. Expression of each mutant channel in GABAergic neurons gave a seizure phenotype which responded either positively or negatively to 5 frontline epilepsy drugs most commonly administered to patients with KCNT1-epilepsy, often with little or no improvement of seizures. Cannabidiol showed the greatest reduction of the seizure phenotype while some drugs increased the seizure phenotype. Our study shows that Drosophila has the potential to model human KCNT1- epilepsy and can be used as a tool to assess new treatments for KCNT1- epilepsy.


Assuntos
Drosophila , Epilepsia , Canais de Potássio Ativados por Sódio , Animais , Humanos , Drosophila/genética , Drosophila melanogaster/genética , Avaliação Pré-Clínica de Medicamentos , Epilepsia/tratamento farmacológico , Epilepsia/genética , Modelos Animais , Mutação , Proteínas do Tecido Nervoso/genética , Canais de Potássio Ativados por Sódio/genética , Convulsões/tratamento farmacológico , Convulsões/genética , Transgenes
3.
RSC Adv ; 13(43): 30052-30070, 2023 Oct 11.
Artigo em Inglês | MEDLINE | ID: mdl-37849696

RESUMO

Hepatitis C Virus (HCV), affecting millions of people worldwide, is the leading cause of liver disorder, cirrhosis, and hepatocellular carcinoma. HCV is genetically diverse having eight genotypes and several subtypes predominant in different regions of the globe. The HCV NS3/4A protease is a primary therapeutic target for HCV with various FDA-approved antivirals and several clinical developments. However, available protease inhibitors (PIs) have lower potency against HCV genotype 3 (GT3), prevalent in South Asia. In this study, the incumbent computational tools were utilized to understand and explore interactions of the HCV GT3 receptor with the potential inhibitors after the virtual screening of one million compounds retrieved from the ZINC database. The molecular dynamics, pharmacological studies, and experimental studies uncovered the potential PIs as ZINC000224449889, ZINC000224374291, and ZINC000224374456 and the derivative of ZINC000224374456 from the ZINC library. The study revealed that these top-hit compounds exhibited good binding and better pharmacokinetics properties that might be considered the most promising compound against HCV GT3 protease. Viability test, on primary healthy Human Gingival Fibroblasts (HGFs) and cancerous AGS cell line, was also carried out to assess their safety profile after administration. In addition, Surface Plasmon Resonance (SPR) was also performed for the determination of affinity and kinetics of synthesized compounds with target proteins.

4.
Clin Chim Acta ; 547: 117416, 2023 Jul 01.
Artigo em Inglês | MEDLINE | ID: mdl-37276942

RESUMO

BACKGROUND: Coronary arteries disease (CAD) is one of the primary causes of mortality worldwide. Genetic, epigenetic and environmental factors have been hypothesized in the pathogenesis of CAD. Leukocyte telomere length (LTL) has been proposed as a potential biomarker for early detection of atherosclerosis. Telomere is the DNA-Protein structure that maintains stability and integrity of chromosomes and is associated with the aging-related cellular mechanisms. This study is designed to investigate the association of LTL with CAD pathogenesis. MATERIAL AND METHOD: This prospective case-control study included 100 patients and 100 control individuals. DNA was extracted from the peripheral blood samples, and LTL was measured using real-time PCR. Data were normalized with single copy gene and presented as relative telomere length T/S ratio. Comprehensive meta-analysis was conducted to ascertain the pivotal role of telomere length in CAD pathology across multiple populations. RESULTS: Our results showed shorter telomere length in CAD patients as compared to control. The correlation analysis revealed a significant (P-value <0.01) negative correlation between telomere length with basal metabolic index (BMI), total cholesterol, and low-density lipoprotein cholesterol (LDL-C) and a positive correlation with high-density lipoprotein cholesterol (HDL-C). Meta-analysis results indicated a significantly shorter telomere length in the Asian population and a non-significant shorter telomere length in other populations. Receiver operator curve (ROC) analysis demonstrated an area under the curve (AUC) of 0.814 with cut-off value of 0.691 exhibited sensitivity of 72.2%, and specificity of 79.1%, for the diagnosis of CAD. CONCLUSION: In conclusion, LTL is associated with the onset of CAD and could be used as a diagnostic predictor to screen individuals with CAD.


Assuntos
Doença da Artéria Coronariana , Humanos , Doença da Artéria Coronariana/diagnóstico , Doença da Artéria Coronariana/genética , Estudos de Casos e Controles , Paquistão , Telômero/genética , Leucócitos , Colesterol
5.
Metabolites ; 13(5)2023 May 09.
Artigo em Inglês | MEDLINE | ID: mdl-37233683

RESUMO

Aneuploidy, or having a disrupted genome, is an aberration commonly found in tumours but rare in normal tissues. It gives rise to proteotoxic stress as well as a stereotypical oxidative shift, which makes these cells sensitive to internal and environmental stresses. Using Drosophila as a model, we investigated the changes in transcription in response to ongoing changes to ploidy (chromosomal instability, CIN). We noticed changes in genes affecting one-carbon metabolism, specifically those affecting the production and use of s-adenosyl methionine (SAM). The depletion of several of these genes has led to cell death by apoptosis in CIN cells but not in normal proliferating cells. We found that CIN cells are particularly sensitive to SAM metabolism at least partly because of its role in generating polyamines. Feeding animals spermine was seen to rescue the cell death caused by the loss of SAM synthase in CIN tissues. The loss of polyamines led to decreased rates of autophagy and sensitivity to reactive oxygen species (ROS), which we have shown to contribute significantly to cell death in CIN cells. These findings suggest that a well-tolerated metabolic intervention such as polyamine inhibition has the potential to target CIN tumours via a relatively well-characterised mechanism.

6.
Saudi J Biol Sci ; 30(3): 103561, 2023 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-36684115

RESUMO

COVID-19 is a pulmonary disease caused by SARS-CoV-2. More than 200 million individuals are infected by this globally. Pyrexia, coughing, shortness of breath, headaches, diarrhoea, sore throats, and body aches are among the typical symptoms of COVID-19. The virus enters into the host body by interacting with the ACE2 receptor. Despite many SARS-CoV-2 vaccines manufactured by distinct strategies but any evidence-based particular medication to combat COVID-19 is not available yet. However, further research is required to determine the safety and effectiveness profile of the present therapeutic approaches. In this study, we provide a summary of Traditional Arabic or Islamic medicinal (TAIM) plants' historical use and their present role as adjuvant therapy for COVID-19. Herein, six medicinal plants Aloe barbadensis Miller, Olea europaea, Trigonella foenum-graecum, Nigella sativa, Cassia angustifolia, and Ficus carica have been studied based upon their pharmacological activities against viral infections. These plants include phytochemicals that have antiviral, immunomodulatory, antiasthmatic, antipyretic, and antitussive properties. These bioactive substances could be employed to control symptoms and enhance the development of a possible COVID-19 medicinal synthesis. To determine whether or if these TAIMs may be used as adjuvant therapy and are appropriate, a detailed evaluation is advised.

7.
Acta Paediatr ; 112(2): 273-276, 2023 02.
Artigo em Inglês | MEDLINE | ID: mdl-36271909

RESUMO

Sudden infant death syndrome (SIDS) occurs more often in male than in female infants, suggesting involvement of the X-chromosome. Histopathological studies have suggested that altered expression of the Neurokinin-1 receptor may also play a role in the pathogenesis of SIDS. It was hypothesised that genetic variants in three X-chromosome-encoded microRNA (miRNA/miR), known to down-regulate expression of the Neurokinin-1 receptor, may contribute to SIDS. AIM: To identify sequence variants in the miRNAs within a study cohort (27 cases of SIDS and 28 controls) and determine if there was a difference in the frequencies in male and female SIDS infants. METHODS: Genomic DNA prepared from stored blood spots was amplified and sequenced to identify genetic variants in miR500A, miR500B and miR320D2. RESULTS: No novel variants in the miRNAs were identified in our study cohort. We identified one known single-nucleotide polymorphism (SNP) in miR320D2: rs5907732 G/T, in both cases and controls. No significant difference in the SNP frequency was observed between male and female SIDS cases. CONCLUSION: This pilot study suggests that sequence variants in three miRNAs do not contribute to the reported higher prevalence of SIDS in male infants and do not contribute to the pathogenesis of SIDS in our cohort.


Assuntos
MicroRNAs , Morte Súbita do Lactente , Lactente , Humanos , Masculino , Feminino , Receptores da Neurocinina-1/genética , Morte Súbita do Lactente/genética , Morte Súbita do Lactente/epidemiologia , MicroRNAs/genética , Projetos Piloto , Polimorfismo de Nucleotídeo Único
8.
Biomolecules ; 12(12)2022 12 19.
Artigo em Inglês | MEDLINE | ID: mdl-36551330

RESUMO

Cancer metabolic reprogramming is essential for maintaining cancer cell survival and rapid replication. A common target of this metabolic reprogramming is one-carbon metabolism which is notable for its function in DNA synthesis, protein and DNA methylation, and antioxidant production. Polyamines are a key output of one-carbon metabolism with widespread effects on gene expression and signaling. As a result of these functions, one-carbon and polyamine metabolism have recently drawn a lot of interest for their part in cancer malignancy. Therapeutic inhibitors that target one-carbon and polyamine metabolism have thus been trialed as anticancer medications. The significance and future possibilities of one-carbon and polyamine metabolism as a target in cancer therapy are discussed in this review.


Assuntos
Antineoplásicos , Neoplasias , Humanos , Carbono/metabolismo , Poliaminas/metabolismo , Metilação de DNA , Antineoplásicos/farmacologia , Antineoplásicos/uso terapêutico , Neoplasias/tratamento farmacológico , Neoplasias/metabolismo
9.
Int J Mol Sci ; 23(23)2022 Dec 01.
Artigo em Inglês | MEDLINE | ID: mdl-36499459

RESUMO

KCNT1 (K+ channel subfamily T member 1) is a sodium-activated potassium channel highly expressed in the nervous system which regulates neuronal excitability by contributing to the resting membrane potential and hyperpolarisation following a train of action potentials. Gain of function mutations in the KCNT1 gene are the cause of neurological disorders associated with different forms of epilepsy. To gain insights into the underlying pathobiology we investigated the functional effects of 9 recently published KCNT1 mutations, 4 previously studied KCNT1 mutations, and one previously unpublished KCNT1 variant of unknown significance. We analysed the properties of KCNT1 potassium currents and attempted to find a correlation between the changes in KCNT1 characteristics due to the mutations and severity of the neurological disorder they cause. KCNT1 mutations identified in patients with epilepsy were introduced into the full length human KCNT1 cDNA using quick-change site-directed mutagenesis protocol. Electrophysiological properties of different KCNT1 constructs were investigated using a heterologous expression system (HEK293T cells) and patch clamping. All mutations studied, except T314A, increased the amplitude of KCNT1 currents, and some mutations shifted the voltage dependence of KCNT1 open probability, increasing the proportion of channels open at the resting membrane potential. The T314A mutation did not affect KCNT1 current amplitude but abolished its voltage dependence. We observed a positive correlation between the severity of the neurological disorder and the KCNT1 channel open probability at resting membrane potential. This suggests that gain of function KCNT1 mutations cause epilepsy by increasing resting potassium conductance and suppressing the activity of inhibitory neurons. A reduction in action potential firing in inhibitory neurons due to excessively high resting potassium conductance leads to disinhibition of neural circuits, hyperexcitability and seizures.


Assuntos
Epilepsia , Proteínas do Tecido Nervoso , Humanos , Canais de Potássio Ativados por Sódio/genética , Células HEK293 , Proteínas do Tecido Nervoso/metabolismo , Epilepsia/genética , Mutação , Potássio/metabolismo
10.
Front Microbiol ; 13: 813415, 2022.
Artigo em Inglês | MEDLINE | ID: mdl-35801109

RESUMO

Less nutrient availability and drought stress are some serious concerns of agriculture. Both biotic and abiotic stress factors have the potential to limit crop productivity. However, several organic extracts obtained from moringa leaves may induce immunity in plants under nutritional and drought stress for increasing their survival. Additionally, some rhizobacterial strains have the ability to enhance root growth for better nutrient and water uptake in stress conditions. To cover the knowledge gap on the interactive effects of beneficial rhizobacteria and moringa leaf extracts (MLEs), this study was conducted. The aim of this experimental study was to investigate the effectiveness of sole and combined use of rhizobacteria and MLEs against nutritional and drought stress in wheat. Nitrogen-fixing bacteria Pseudomonas aeruginosa (Pa) (108 CFU ml-1) was inoculated to wheat plants with and without foliar-applied MLEs at two different concentrations (MLE 1 = 1:15 v/v and MLE 2 = 1:30 v/v) twice at 25 and 35 days after seed sowing (50 ml per plant) after the establishment of drought stress. Results revealed that Pa + MLE 2 significantly increased fresh weight (FW), dry weight (DW), lengths of roots and shoot and photosynthetic contents of wheat. A significant enhancement in total soluble sugars, total soluble proteins, calcium, potassium, phosphate, and nitrate contents validated the efficacious effect of Pa + MLE 2 over control-treated plants. Significant decrease in sodium, proline, glycine betaine, electrolyte leakage, malondialdehyde, hydrogen peroxide, superoxide dismutase (SOD), and peroxide (POD) concentrations in wheat cultivated under drought stress conditions also represents the imperative role of Pa + MLE 2 over control. In conclusion, Pa + MLE 2 can alleviate nutritional stress and drought effects in wheat. More research in this field is required to proclaim Pa + MLE 2 as the most effective amendment against drought stress in distinct agroecological zones, different soil types, and contrasting wheat cultivars worldwide.

11.
Saudi J Biol Sci ; 29(3): 1386-1393, 2022 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-35280589

RESUMO

Elevated concentrations of salts in soil and water represent abiotic stresses. It considerably restricts plant productivity. However, the use of alpha-tocopherol (α-toc) as foliar can overcome this problem. It can improve crop productivity grown under salinity stress. Limited literature is documented regarding its optimum foliar application on sunflower. That's why the need for the time is to optimize α-toc foliar application rates for sunflower cultivated in salt-affected soil. A pot experiment was performed to select a better α-toc foliar application for mitigation of salt stress in different sunflower cultivars FH (572 and 621). There were 2 levels of salts, i.e., control (no salt stress) and sodium chloride (120 mM) and four α-toc foliar application (0, 100, 200, and 300 mg L-1). Results showed that foliar application of 100 mg/L- α-toc triggered the remarkable increase in fresh shoot weight, fresh root weight, shoot, and root lengths under salinity stress in FH-572 and FH-621 over 0 mg/L- α-toc. Foliar application of 200 mg/L- α-toc was most effective for improvement in chlorophyll a, chlorophyll b, total chlorophyll and carotenoids compared to 0 mg/L- α-toc. Furthermore, an increase in A was noted in FH-572 (17%) and FH-621 (22%) with α-toc (300 mg L-1) application under saline condition. In conclusion, the 100 and 200 mg/L- α-toc are the best application rates for the improvement in sunflower FH-572 and FH-621 growth, chlorophyll contents and gas exchange attributes. Further investigations are needed to select a better foliar application rate between 100 and 200 mg/L- α-toc at the field level under the different agro-climatic zone and soil types.

12.
Curr Opin Anaesthesiol ; 35(2): 201-207, 2022 Apr 01.
Artigo em Inglês | MEDLINE | ID: mdl-35165234

RESUMO

PURPOSE OF REVIEW: Intersectionality, or the overlapping nature of social categorizations, such as race, class, and gender, creates interdependent systems of discrimination, disadvantage, and health disparities. The present review examines common shortcomings to diversity management, and proposes targeted improvement frameworks for anesthesiology departments that would offer competitive advantage in training, hiring, and retention, and improved care delivery aimed toward reducing health disparities. RECENT FINDINGS: Studies highlight that physicians equipped to care for diverse populations enhance patient-doctor interactions and reduce health disparities. Moreover, untrained providers and staff who engage in disrespectful behaviors like microaggressions can lead to staff turnover and millions of dollars in lost revenue. Underrepresented minorities continue to have lower faculty academic rank in anesthesiology, fewer partnership opportunities in private practice, and disparate research funding. Diversity-based education and training often overlooks intersectionality and reductively illustrates diverse groups as internally homogenous. Even these developing diversity efforts have become politicized and are perceived as uninteresting, irrelevant to medical practice, or unable to create organizational change. SUMMARY: The synergy of intersectionality mounts considerable challenges that impact patients, colleagues, and communities of practice. Examining intersectionality in education and workplace policy affords tremendous opportunity for improving quality of care for marginalized populations, reducing healthcare costs, and normalizing culture that is inclusive, equitable, and empowering.


Assuntos
Anestesiologia , Atenção à Saúde , Humanos , Enquadramento Interseccional
13.
PLoS One ; 17(2): e0263194, 2022.
Artigo em Inglês | MEDLINE | ID: mdl-35192615

RESUMO

Salt stress is the major risk to the seed germination and plant growth via affecting physiological and biochemical activities in plants. Zinc nanoparticles (ZnNPs) are emerged as a key agent in regulating the tolerance mechanism in plants under environmental stresses. However, the tolerance mechanisms which are regulated by ZnNPs in plants are still not fully understood. Therefore, the observation was planned to explore the role of ZnNPs (applied as priming and foliar) in reducing the harmful influence of sodium chloride (NaCl) stress on the development of spinach (Spinacia oleracea L.) plants. Varying concentrations of ZnNPs (0.1%, 0.2% & 0.3%) were employed to the spinach as seed priming and foliar, under control as well as salt stress environment. The alleviation of stress was observed in ZnNPs-applied spinach plants grown under salt stress, with a reduced rise in the concentration hydrogen peroxide, melondialdehyde and anthocyanin contents. A clear decline in soluble proteins, chlorophyll contents, ascorbic acid, sugars, and total phenolic contents was observed in stressed conditions. Exogenous ZnNPs suppressed the NaCl generated reduction in biochemical traits, and progress of spinach plants. However, ZnNPs spray at 0.3% followed by priming was the most prominent treatment in the accumulation of osmolytes and the production of antioxidant molecules in plants.


Assuntos
Nanopartículas Metálicas/administração & dosagem , Substâncias Protetoras/farmacologia , Estresse Salino/fisiologia , Sementes/efeitos dos fármacos , Cloreto de Sódio/farmacologia , Spinacia oleracea/efeitos dos fármacos , Zinco/farmacologia , Partículas e Gotas Aerossolizadas/administração & dosagem , Antocianinas/metabolismo , Ácido Ascórbico/metabolismo , Clorofila/metabolismo , Peróxido de Hidrogênio/metabolismo , Malondialdeído/metabolismo , Nanopartículas Metálicas/química , Fenóis/metabolismo , Folhas de Planta/efeitos dos fármacos , Folhas de Planta/crescimento & desenvolvimento , Folhas de Planta/metabolismo , Sementes/crescimento & desenvolvimento , Sementes/metabolismo , Spinacia oleracea/crescimento & desenvolvimento , Spinacia oleracea/metabolismo
14.
PLoS One ; 16(11): e0257893, 2021.
Artigo em Inglês | MEDLINE | ID: mdl-34735478

RESUMO

Climate change is causing soil salinization, resulting in huge crop losses throughout the world. Multiple physiological and biochemical pathways determine the ability of plants to tolerate salt stress. Chili (Capsicum annum L.) is a salt-susceptible crop; therefore, its growth and yield is negatively impacted by salinity. Irreversible damage at cell level and photo inhibition due to high production of reactive oxygen species (ROS) and less CO2 availability caused by water stress is directly linked with salinity. A pot experiment was conducted to determine the impact of five NaCl salinity levels, i.e., 0,1.5, 3.0, 5.0 and 7.0 dS m-1 on growth, biochemical attributes and yield of two chili genotypes ('Plahi' and 'A-120'). Salinity stress significantly reduced fresh and dry weight, relative water contents, water use efficiency, leaf osmotic potential, glycine betaine (GB) contents, photosynthetic rate (A), transpiration rate (E), stomatal conductance (Ci), and chlorophyll contents of tested genotypes. Salinity stress significantly enhanced malondialdehyde (MDA) contents and activities of the enzymatic antioxidants such as superoxide dismutase (SOD), catalase (CAT) and peroxidase (POD). In addition, increasing salinity levels significantly reduced the tissue phosphorus and potassium concentrations, while enhanced the tissue sodium and chloride concentrations. Genotype 'Plahi' had better growth and biochemical attributes compared to 'A-120'. Therefore, 'Plahi' is recommended for saline areas to improve chili production.


Assuntos
Capsicum/genética , Salinidade , Estresse Salino/genética , Tolerância ao Sal/genética , Capsicum/crescimento & desenvolvimento , Clorofila/genética , Genótipo , Malondialdeído/metabolismo , Peroxidase/genética , Folhas de Planta/genética , Folhas de Planta/crescimento & desenvolvimento , Potássio/metabolismo , Espécies Reativas de Oxigênio/metabolismo , Sódio/metabolismo , Cloreto de Sódio/efeitos adversos , Superóxido Dismutase/genética , Água/química
15.
Plants (Basel) ; 10(8)2021 Aug 16.
Artigo em Inglês | MEDLINE | ID: mdl-34451726

RESUMO

Gene silencing is the epigenetic regulation of any gene in order to prevent gene expression at the transcription or translation levels. Among various gene silencing techniques, RNA silencing (RNAi) is notable gene regulation technique that involves sequence-specific targeting and RNA degradation. However, the effectiveness of transgene-induced RNAi in F1 generation of chrysanthemum has not been studied yet. In the current study, we used RNAi-constructed CmTFL1 (white-flowered) and CmSVP overexpressed (yellow flowered) transgenic plants of previously conducted two studies for our experiment. Cross hybridization was performed between these intergeneric transgenic and non-transgenic plants of the winter-growing chrysanthemum selection "37" (light pink flowered). The transgene CmSVP was confirmed in F1 hybrids by RT-PCR analysis, whereas hybrids of CmTFL1 parental plants were non-transgenic. Besides this, quantitative real-time PCR (qPCR) was used to explain the molecular mechanism of flower development using reference genes. Intergeneric and interspecific hybrids produced different colored flowers unlike their respective parents. These results suggest that generic traits of CmSVP overexpressed plants can be transferred into F1 generations when crossed with mutant plants. This study will aid in understanding the breeding phenomenon among intergeneric hybrids of chrysanthemum plants at an in vivo level, and such transgenics will also be more suitable for sustainable flower yield under a low-light production system.

16.
Case Rep Cardiol ; 2021: 8833216, 2021.
Artigo em Inglês | MEDLINE | ID: mdl-33628519

RESUMO

Apical Hypertrophic Cardiomyopathy (ApHCM) is a rare variant of hypertrophic cardiomyopathy with a low prevalence in the general population. ApHCM with right ventricular involvement (BiApHCM) is largely unreported and may not be detected with conventional transthoracic echocardiogram (TTE) alone. Cardiac Magnetic Resonance (CMR) has been demonstrated to be a proficient imaging modality to diagnose BiApHCM. We present a case of BiApHCM that was diagnosed with TTE and further characterized by CMR. This imaging modality may be utilized more in the future to help diagnose and detect the prevalence of BiApHCM.

17.
Curr Opin Anaesthesiol ; 34(2): 149-153, 2021 Apr 01.
Artigo em Inglês | MEDLINE | ID: mdl-33606396

RESUMO

PURPOSE OF REVIEW: The ICU is a complex ecosystem in which intensive care physicians, advanced practice providers (APPs), pharmacists, and respiratory therapists work in concert to take care of critically ill patients. The SARS COV2 pandemic highlighted weaknesses in the American healthcare system. This article explores the ability of American healthcare to adapt to this challenge. RECENT FINDINGS: With the COVID-19 pandemic, intensivists, and ventilators have been identified as the most critical components leading to shortages in ICU capacity. Anesthesiologists play a unique role in being able to provide 'flex capacity' with critical care staffing, space, and equipment (post-anesthesia care units, operating rooms, and ventilators). With the advent of APPs, intensive care physician staffing ratios may potentially be increased to cover patients safely in a physician-led team model. Tele-medicine expands this further and can allow hospital coordination for optimizing ICU bed use. SUMMARY: Although intensivists have been able to take care of the increased ICU caseload during the COVID-19 pandemic through recruiting other specialties, the question of what is the appropriate staffing model for the future is yet to be elucidated. Creating stronger multidisciplinary care teams that have the capacity to flex up critical care capacity may be the most prudent longer-term solution.


Assuntos
COVID-19 , Médicos , Cuidados Críticos , Humanos , Unidades de Terapia Intensiva , Pandemias , SARS-CoV-2 , Estados Unidos , Recursos Humanos
18.
Sci Rep ; 9(1): 11267, 2019 08 02.
Artigo em Inglês | MEDLINE | ID: mdl-31375721

RESUMO

Top-Down Proteomics (TDP) is an emerging proteomics protocol that involves identification, characterization, and quantitation of intact proteins using high-resolution mass spectrometry. TDP has an edge over other proteomics protocols in that it allows for: (i) accurate measurement of intact protein mass, (ii) high sequence coverage, and (iii) enhanced identification of post-translational modifications (PTMs). However, the complexity of TDP spectra poses a significant impediment to protein search and PTM characterization. Furthermore, limited software support is currently available in the form of search algorithms and pipelines. To address this need, we propose 'SPECTRUM', an open-architecture and open-source toolbox for TDP data analysis. Its salient features include: (i) MS2-based intact protein mass tuning, (ii) de novo peptide sequence tag analysis, (iii) propensity-driven PTM characterization, (iv) blind PTM search, (v) spectral comparison, (vi) identification of truncated proteins, (vii) multifactorial coefficient-weighted scoring, and (viii) intuitive graphical user interfaces to access the aforementioned functionalities and visualization of results. We have validated SPECTRUM using published datasets and benchmarked it against salient TDP tools. SPECTRUM provides significantly enhanced protein identification rates (91% to 177%) over its contemporaries. SPECTRUM has been implemented in MATLAB, and is freely available along with its source code and documentation at https://github.com/BIRL/SPECTRUM/.


Assuntos
Algoritmos , Proteômica/métodos , Software , Bases de Dados de Proteínas , Conjuntos de Dados como Assunto , Células HeLa , Humanos , Peso Molecular , Isoformas de Proteínas/química , Isoformas de Proteínas/isolamento & purificação , Isoformas de Proteínas/metabolismo , Processamento de Proteína Pós-Traducional , Proteoma/química , Proteoma/isolamento & purificação , Proteoma/metabolismo , Análise de Sequência de Proteína/métodos
19.
Med Res Rev ; 39(3): 1091-1136, 2019 05.
Artigo em Inglês | MEDLINE | ID: mdl-30506705

RESUMO

Hepatitis C compromises the quality of life of more than 350 million individuals worldwide. Over the last decade, therapeutic regimens for treating hepatitis C virus (HCV) infections have undergone rapid advancements. Initially, structure-based drug design was used to develop molecules that inhibit viral enzymes. Subsequently, establishment of cell-based replicon systems enabled investigations into various stages of HCV life cycle including its entry, replication, translation, and assembly, as well as role of host proteins. Collectively, these approaches have facilitated identification of important molecules that are deemed essential for HCV life cycle. The expanded set of putative virus and host-encoded targets has brought us one step closer to developing robust strategies for efficacious, pangenotypic, and well-tolerated medicines against HCV. Herein, we provide an overview of the development of various classes of virus and host-directed therapies that are currently in use along with others that are undergoing clinical evaluation.


Assuntos
Antivirais/farmacologia , Hepacivirus/efeitos dos fármacos , Hepacivirus/genética , Animais , Antivirais/química , Antivirais/uso terapêutico , Genótipo , Hepacivirus/fisiologia , Hepatite C/tratamento farmacológico , Humanos , Resultado do Tratamento , Vacinas Virais/imunologia
20.
Pak J Pharm Sci ; 31(6 (Supplementary): 2697-2708, 2018 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-30587482

RESUMO

The research was aimed to unravel the enzymatic potential of sequentially transformed new triazoles by chemically converting 4-methoxybenzoic acid via Fischer's esterification to 4-methoxybenzoate which underwent hydrazinolysis and the corresponding hydrazide (1) was cyclized with phenyl isothiocyanate (2) via 2-(4-methoxybenzoyl)-N-phenylhydrazinecarbothioamide (3); an intermediate to 5-(4-methoxyphenyl)-4-phenyl-4H-1,2,4-triazol-3-thiol (4). The electrophiles; alkyl halides 5(a-g) were further reacted with nucleophilic S-atom to attain a series of S-alkylated 5-(4-methoxyphenyl)-4-phenyl-4H-1,2,4-triazole-3-thiols 6(a-g). Characterization of synthesized compounds was accomplished by contemporary spectral techniques such as FT-IR, 1H-NMR, 13C-NMR and EI-MS. Excellent cholinesterase inhibitory potential was portrayed by 3-(n-heptylthio)-5-(4-methoxyphenyl)-4-phenyl-4H-1,2,4-triazole; 6g against AChE (IC50; 38.35±0.62µM) and BChE (IC50; 147.75±0.67µM) enzymes. Eserine (IC50; 0.04±0.01µM) was used as reference standard. Anti-proliferative activity results ascertained that derivative encompassing long straight chain substituted at S-atom of the moiety was the most potent with 4.96 % cell viability (6g) at 25µM and with 2.41% cell viability at 50µMamong library of synthesized derivatives. In silico analysis also substantiated the bioactivity statistics.


Assuntos
Inibidores da Colinesterase/síntese química , Simulação por Computador , Simulação de Acoplamento Molecular/métodos , Compostos de Sulfidrila/síntese química , Triazóis/síntese química , Inibidores da Colinesterase/metabolismo , Células HCT116 , Humanos , Compostos de Sulfidrila/metabolismo , Triazóis/metabolismo
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