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Regarding the multiple health effects of e-cigarettes, there are insufficient data on potential effects on bronchial reactivity (BHR). In the present study, we assessed the impact of a switch from conventional to e-cigarettes on BHR under realistic conditions over a period of 3 months.
Sixty subjects who declared to reduce or stop their tobacco consumption by inhalation of nicotine-containing liquids via e-cigarette, and 20 volunteers participating in a stop-smoking program were included. Data was analysed using parametric and non-parametric statistical procedures. Spirometry, determinations of exhaled carbon monoxide (eCO) and nitric oxide (FeNO), provocation testing with mannitol as an indirect bronchial stimulus, and cotinine measurements were used to investigate BHR and nicotine abstinence.
BHR to mannitol significantly decreased in the group using e-cigarettes and nicotine-containing liquids over a period of three months in this real-life setting. Participants reduced their tobacco consumption to about 25% or lower, confirmed by a reduction in eCO. Changes in lung function and FeNO were small and not statistically significant, and changes in the stop-smoking group were similar to those in the e-cigarette group.
The reduction in BHR that can be expected after a reduction of cigarette consumption was not abolished by the concomitant use of e-cigarettes. Whether the decrease in BHR observed after 3 months is maintained when using e-cigarettes over longer time periods or has an individual prognostic value, must be clarified in long-term studies.
The reduction in BHR that can be expected after a reduction of cigarette consumption was not abolished by the concomitant use of e-cigarettes. Whether the decrease in BHR observed after 3 months is maintained when using e-cigarettes over longer time periods or has an individual prognostic value, must be clarified in long-term studies.
Low shear stress (LSS) has been demonstrated to be involved in function of vascular endothelial cells. Here we tested the hypothesis that activation of Syk played an important in LSS-induced atherosclerosis via PECAM-1 signaling pathway.
In vitro, primary human umbilical vein endothelial cells (HUVECs) were stimulated with parallel plate flow chamber system for 12h under normal shear stress (NSS, 15dyne/cm
), LSS (5dyne/cm
) and high shear stress (HSS, 25dyne/cm
), respectively, followed by inflammatory response analysis. In vivo, animal models of rat fed atherogenic diet were treated with LSS stimulation by constricting abdominal aorta with a blunted needle (0.6mm in diameter). The spatial distribution of WSS of blood vessels was generated by WSS quantitative analysis software through color Doppler flow imaging with a high-frequency small animal ultrasound system. Small molecule R406, a well-demonstrated Syk inhibitor, was applied to animals as well as HUVEC cells.
In vivo, comparison with the control group was performed, the mean value of WSS distribution of blood vessels was lower in LSS model rat. LSS promoted expression of phosphorylated PECAM-1 (p-PECAM-1) and Syk in LSS model rats. Compared with control group, endothelial cells of the abdominal aorta become less elongated and more polygonal in LSS group, and had a slender shape in LSS with R406 group. In vitro, LSS increased the expression of p-PECAM-1, Syk and NF-κB in HUVECs. Inhibition of Syk attenuated LSS-induced inflammatory response.
Activation of Syk resulted in LSS-induced inflammatory response via PECAM-1 signaling pathway both in vitro and in vivo. Syk might be involved in morphological changes of ECs under the influence of LSS.
Activation of Syk resulted in LSS-induced inflammatory response via PECAM-1 signaling pathway both in vitro and in vivo. Syk might be involved in morphological changes of ECs under the influence of LSS.Vehicle automation safety must be evaluated not only for market success but also for more informed decision-making about Automated Vehicles' (AVs) deployment and supporting policies and regulations to govern AVs' unintended consequences. This study is designed to identify the AV safety quantification studies, evaluate the quantification approaches used in the literature, and uncover the gaps and challenges in AV safety evaluation. We employed a scoping review methodology to identify the approaches used in the literature to quantify AV safety. this website After screening and reviewing the literature, six approaches were identified target crash population, traffic simulation, driving simulator, road test data analysis, system failure risk assessment, and safety effectiveness estimation. We ran two evaluations on the identified approaches. First, we investigated each approach in terms of its input (required data, assumptions, etc.), output (safety evaluation metrics), and application (to estimate AVs' safety implications at the vehicle, transportation system, and society levels). Second, we qualitatively compared them in terms of three criteria availability of input data, suitability for evaluating different automation levels, and reliability of estimations. This review identifies four challenges in AV safety evaluation (a) shortcomings in AV safety evaluation approaches, (b) uncertainties in AV implementations and their impacts on AV safety, (c) potential riskier behavior of AV passengers as well as other road users, and (d) emerging safety issues related to AV implementations. This review is expected to help researchers and rulemakers to choose the most appropriate quantification method based on their goals and study limitations. Future research is required to address the identified challenges in AV safety evaluation.The variation in lipidome of house cricket, banded cricket, Jamaican field cricket and two-spotted cricket was studied using high-throughput screening techniques for fingerprinting (MALDI TOF MS, GC-MS and LC MS-MS) and well-stablished chromatographic techniques for quantification (HPLC-ELSD, GC- FID). Although the four cricket species were reared in identical conditions, two-spotted & banded crickets had a lipid content 1.5 fold higher than house cricket. The lipids were high in UFA (>63%) and unsaturated TAG (>98%) making them liquid at room temperature, thus an oil. Cholesterol and several phytosterols were profiled finding high cholesterol concentration which is a point of concern. Eight phospholipid types (211 species) were identified with no major differences among cricket species. Using high-throughput screening techniques we demonstrate the complexity of cricket lipidome. Information on the lipidome of these crickets with high commercial value is important to estimate its nutritional value and their potential food applications.
Read More: https://www.selleckchem.com/products/BIBF1120.html
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