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202.
Irina N. Dolganova Arsen K. Zotov Larisa P. Safonova Polina V. Aleksandrova Igor V. Reshetov Kirill I. Zaytsev Valery V. Tuchin Vladimir N. Kurlov 《Journal of biophotonics》2023,16(3):e202200288
This article describes a sapphire cryoprobe as a promising solution to the significant problem of modern cryosurgery that is the monitoring of tissue freezing. This probe consists of a sapphire rod manufactured by the edge-defined film-fed growth technique from Al2O3 melt and optical fibers accommodated inside the rod and connected to the source and the detector. The probe's design enables detection of spatially resolved diffuse reflected intensities of tissue optical response, which are used for the estimation of tissue freezing depth. The current type of the 12.5-mm diameter sapphire probe cooled down by the liquid nitrogen assumes a superficial cryoablation. The experimental test made by using a gelatin-intralipid tissue phantom shows the feasibility of such concept, revealing the capabilities of monitoring the freezing depth up to 10 mm by the particular instrumentation realization of the probe. This justifies a potential of sapphire-based instruments aided by optical diagnosis in modern cryosurgery. 相似文献
203.
Stefani Vircheva Galina Nenkova Almira Georgieva Albena Alexandrova Elina Tzvetanova Polina Mateeva Rositsa Zamfirova Margarita Kirkova 《Cell biochemistry and function》2012,30(1):18-23
The pathogenesis of many diseases and different pathological conditions, including inflammation, is associated with excess production of reactive oxygen species (ROS). The present study aimed to investigate the effects of the antidepressant desipramine (DES) on carrageenan (CG)‐induced inflammation, as well as on the endogenous levels of cell enzyme and non‐enzyme antioxidants in rat liver and spleen, 4 and 24 h after CG injection. The intra‐plantar CG injection into the right hind paw resulted in a time‐dependent increase in the paw volume; the maximum of CG‐induced edema peak was in 2–4 h. A single DES dose of 20 mg·kg?1, administered 30 min before CG, had no effect on paw edema, whereas the higher drug dose used (50 mg·kg?1) suppressed the edematous response to CG. The latter drug dose protected CG‐induced decrease of glutathione (non‐enzyme antioxidant) in the liver; it did not affect CG‐unchanged activities of superoxide dismutase, glutathione peroxidase (enzyme antioxidants) and glucose‐6‐phosphate dehydrogenase (enzyme, important for the activity of glutathione‐conjugated antioxidant enzymes) in both liver and spleen. The drug showed an efficient antioxidant capacity in ROS‐generating chemical systems; it was higher than that of fluoxetine (another type of antidepressant). The present results suggest that the good antioxidant activity of DES might contribute to its beneficial effects in liver injuries. Copyright © 2011 John Wiley & Sons, Ltd. 相似文献
204.
Protein phosphatase 2A (PP2A) is a serine/threonine-specific phosphatase comprising a catalytic subunit (C), a scaffolding
subunit (A), and a regulatory subunit (B). The B subunits are believed to be responsible for substrate specificity and localization
of the PP2A complex. In plants, three families of B subunits exist, i.e. B (B55), B′, and B′′. Here, we report differential
subcellular targeting within the Arabidopsis B′η subfamily, which consists of the close homologs B′η, B′θ, B′γ and B′ζ. Phenotypes of corresponding knockouts were observed,
and particularly revealed delayed flowering for the B′η knockout. The B′ subunits were linked to fluorescent tags and transiently
expressed in various tissues of onion, tobacco and Arabidopsis. B′η and B′γ targeted the cytosol and nucleus. B′ζ localized to the cytoplasm and partly co-localized with mitochondrial
markers when the N-terminus was free. Provided its C-terminus was free, the B′θ subunit targeted peroxisomes. The importance
of the C-terminal end for peroxisomal targeting was further confirmed by truncation of the C-terminus. The results revealed
that the closely related B′ subunits are targeting different organelles in plants, and exemplify the usage of the peptide
serine–serine–leucine as a PTS1 peroxisomal signaling peptide. 相似文献
205.
Jean P. Elbers Mark F. Rogers Polina L. Perelman Anastasia A. Proskuryakova Natalia A. Serdyukova Warren E. Johnson Petr Horin Jukka Corander David Murphy Pamela A. Burger 《Molecular ecology resources》2019,19(4):1015-1026
Researchers have assembled thousands of eukaryotic genomes using Illumina reads, but traditional mate‐pair libraries cannot span all repetitive elements, resulting in highly fragmented assemblies. However, both chromosome conformation capture techniques, such as Hi‐C and Dovetail Genomics Chicago libraries and long‐read sequencing, such as Pacific Biosciences and Oxford Nanopore, help span and resolve repetitive regions and therefore improve genome assemblies. One important livestock species of arid regions that does not have a high‐quality contiguous reference genome is the dromedary (Camelus dromedarius). Draft genomes exist but are highly fragmented, and a high‐quality reference genome is needed to understand adaptation to desert environments and artificial selection during domestication. Dromedaries are among the last livestock species to have been domesticated, and together with wild and domestic Bactrian camels, they are the only representatives of the Camelini tribe, which highlights their evolutionary significance. Here we describe our efforts to improve the North African dromedary genome. We used Chicago and Hi‐C sequencing libraries from Dovetail Genomics to resolve the order of previously assembled contigs, producing almost chromosome‐level scaffolds. Remaining gaps were filled with Pacific Biosciences long reads, and then scaffolds were comparatively mapped to chromosomes. Long reads added 99.32 Mbp to the total length of the new assembly. Dovetail Chicago and Hi‐C libraries increased the longest scaffold over 12‐fold, from 9.71 Mbp to 124.99 Mbp and the scaffold N50 over 50‐fold, from 1.48 Mbp to 75.02 Mbp. We demonstrate that Illumina de novo assemblies can be substantially upgraded by combining chromosome conformation capture and long‐read sequencing. 相似文献
206.
Thouis R Jones In Han Kang Douglas B Wheeler Robert A Lindquist Adam Papallo David M Sabatini Polina Golland Anne E Carpenter 《BMC bioinformatics》2008,9(1):482
Background
Image-based screens can produce hundreds of measured features for each of hundreds of millions of individual cells in a single experiment. 相似文献207.