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https://www.selleckchem.com/products/-epicatechin.html The MERS-CoV isolated during the 2015 nosocomial outbreak in Korea showed distinctive differences in mortality and transmission patterns compared to the prototype MERS-CoV EMC strain belonging to clade A. We established a BAC-based reverse genetics system for a Korean isolate of MERS-CoV KNIH002 in the clade B phylogenetically far from the EMC strain, and generated a recombinant MERS-CoV expressing red fluorescent protein. The virus rescued from the infectious clone and KNIH002 strain displayed growth attenuation compared to the EMC strain. Consecutive passages of the rescued virus rapidly generated various ORF5 variants, highlighting its genetic instability and calling for caution in the use of repeatedly passaged virus in pathogenesis studies and for evaluation of control measures against MERS-CoV. The infectious clone for the KNIH002 in contemporary epidemic clade B would be useful for better understanding of a functional link between molecular evolution and pathophysiology of MERS-CoV by comparative studies with EMC strain.The objective of the research was to reveal the potential toxicity effects of methyl mercaptan on rat lung tissue. A dynamic exposure device and Sprague-Dawley (SD) rats were adopted. The exposure concentration of methyl mercaptan was 0.5 ± 0.1 ppm. The exposure procedure was 6 h/day, continuing for 30 days. The routine blood levels, oxidative stress levels in serum, immune molecule and cytokine in the serum and lung tissue were tested. Morphology injury of lung tissue was detected by Hematoxylin and Eosin (HE) staining. Apoptosis rate of alveolar epithelial cells were determined by TdT-mediated dUTP Nick End Labeling (TUNEL) assay. Reduction of body weight gain was observed in the male group during the exposure time, while there was no significant reduction of body weight gain in the female group. Pathological findings of terminal bronchiole constriction, alveolar congestion, and erythroc

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