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Airway Closing Index (ACI), the ratio of % change in FVC to % change in FEV with bronchoprovocation, may represent changes in airflow due to airway closure, as opposed to airway narrowing. The objective of this study was to evaluate ACI during exercise bronchoprovocation (EB) in children. Children, 6 to 18 years of age, who underwent EB using a stationary bicycle ergometer over a 6-year period were reviewed. Pulmonary function, including ACI, in patients with a positive exercise challenge, defined as ≥10% decrease in FEV following exercise, were compared to patients with a negative challenge. A total of 1030 children with a median age of 13 (IQR 11-15) underwent EB, of which 376 (37%) had a positive exercise challenge. There was wide variability in ACI, with a median of 0.75 (0.28-1.21). Median ACI in those with a positive test was 0.68 (IQR 0.41-0.93) compared to 0.84 (IQR 0.09-1.06) for those with a negative test, = 0.017. Median ACI was higher in older children ( < 0.001) and females ( < 0.0001). Median percent change in FEV following bronchodilator for children in the highest quintile for ACI was 4.5 (IQR 1.3-8.1) compared to 5.5 (IQR 2-9.2) for children in the lowest quintile, = 0.04. There is wide variability in the ACI in children undergoing EB. https://www.selleckchem.com/products/AZD2281(Olaparib).html ACI was lower in children with a positive challenge, the significance is unknown. Children with higher ACI may have increased airway closure with bronchoprovocation, and less response to bronchodilators. There is wide variability in the ACI in children undergoing EB. ACI was lower in children with a positive challenge, the significance is unknown. Children with higher ACI may have increased airway closure with bronchoprovocation, and less response to bronchodilators.Objectives To systematically review the clinical literature reporting the use of Lopinavir/ritonavir (LPV/r) for the treatment of patients with Cornonavirus disease 19 (COVID-19) to assess the efficacy of LPV/r for the treatment of COVID-19. Methods The authors systematically searched PubMed and MedRxiv databases for studies describing treatment of COVID-19 patients using LPV/r compared to other therapies. Articles were excluded if they were case reports, opinion editorials, preclinical studies, single-armed studies, not written in English, not relevant to the topic, or published before May 2020. The included outcomes were viral clearance as measured by reverse-transcription polymerase chain reaction (RT-PCR) negativity and/or improvement on chest computed tomography (CT), mortality, and adverse events. Results Among 858 total studies, 16 studies met the inclusion criteria and were included in the qualitative review. These studies consisted of 3 randomized control trials, 3 open-label trials, and 10 observational studies. Most of these studies did not report positive clinical outcomes with LPV/r treatment. Conclusion The systematic review revealed insufficient evidence of effectiveness and clinical benefit of LPV/r in the treatment of COVID-19 patients. Specifically, LPV/r does not appear to improve clinical outcome, mortality, time to RT-PCR negativity, or chest CT clearance in patients with COVID-19.Introduction Antimicrobial peptides are a large class of compounds that are part of innate immune response found among all classes of life and are considered promising compounds to deal with antimicrobial resistance. These AMPs have been demonstrated to have some advantages over the traditional antibiotics with a broad spectrum of antimicrobial activities and even overcome bacterial drug-resistance. Areas covered The present review represents a comprehensive analysis of patents and patent applications available on Espacenet, from the year 2015 to 2020 referring to the therapeutic use of AMPs. Expert opinion There are important examples about the use of antimicrobial peptides in clinical practice (e.g. polimixin b, colistin, etc.). AMPs are usually inspired by nature being produced by different living organisms as defensive and/or competition mechanisms. Despite limitations related to their development in classical drug discovery pipeline, they are endowed with relevant advantages, such as an unlimited reservoir of organisms able to produce new AMPs and they represent good starting point upon which to develop new antimicrobials.Metal-free click-chemistry can be used to create silicone hydrogels for ocular drug delivery applications, imparting the benefits of silicones without catalyst contamination. Previous work has demonstrated the capacity for these materials to significantly reduce protein adsorption. Building upon this success, the current work examines and optimizes different materials in terms of their protein adsorption and drug release capabilities. Specifically, incorporating lower molecular weight poly-ethylene glycol (PEG) is better able to reduce protein adsorption. However, with higher molecular weight PEG, the materials exhibit excellent water content and better drug release profiles. The lower molecular weight PEG is also able to deliver the drug over a period in excess of four months, with the amount of crosslinking having the greatest impact on the amount of drug release. Overall, these materials show great promise for ocular applications.Published results of studies on poly(propylene imine) (PPI) dendrimers indicate their potential use in the treatment of brain cancer or neurodegenerative diseases due to their ability to cross the blood-brain barrier. However, depending on dose, neurotoxicity may occur. Here, we discuss the impact of maltotriose modified PPI dendrimers on rat's nervous system. Wistar rats were treated intravenously for 14 consecutive days with densely (dense-shell; DS) and partly (open-shell; OS) modified PPI dendrimers at doses established as safe in the previous experiment following a single DS or OS administration. The examination included an estimation of the motility and the clinical symptoms of the respiratory, nervous, and cardiovascular systems. Both DS and OS glycodendrimers (GDs) induced adverse effects at the doses tested. Multiple administrations of PPI-OS had a detrimental influence on rats' survival. These findings suggest that the dendrimers adversely influence the nervous system and their toxic effects accumulate over time.
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