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Contreras Rocha posted an update 1 year, 5 months ago
Our comparison suggests that each kingdom has evolved its own specific set of regulators, however, the functional categories represented among UPRmt-related target genes appear to be largely overlapping. This indicates that the strategies for preserving proper mitochondrial functions are partially conserved, targeting mitochondrial chaperones, proteases, import components, dynamics and stress response, but likely also non-mitochondrial functions including growth regulators/hormone balance and amino acid metabolism. We also identify homologs of known UPRmt regulators and responsive genes across kingdoms, which may be interesting targets for future research.The proteins secreted by human tissues and blood cells, the secretome, are important both for the basic understanding of human biology and for identification of potential targets for future diagnosis and therapy. Here, a high-throughput mammalian cell factory is presented that was established to create a resource of recombinant full-length proteins covering the majority of those annotated as ‘secreted’ in humans. The full-length DNA sequences of each of the predicted secreted proteins were generated by gene synthesis, the constructs were transfected into Chinese hamster ovary (CHO) cells and the recombinant proteins were produced, purified and analyzed. Almost 1,300 proteins were successfully generated and proteins predicted to be secreted into the blood were produced with a success rate of 65%, while the success rates for the other categories of secreted proteins were somewhat lower giving an overall one-pass success rate of ca. 58%. The proteins were used to generate targeted proteomics assays and several of the proteins were shown to be active in a phenotypic assay involving pancreatic β-cell dedifferentiation. Many of the proteins that failed during production in CHO cells could be rescued in human embryonic kidney (HEK 293) cells suggesting that a cell factory of human origin can be an attractive alternative for production in mammalian cells. In conclusion, a high-throughput protein production and purification system has been successfully established to create a unique resource of the human secretome.The process of aging can be defined as the sum accumulation of damages and changes in metabolism during the life of an organism, due to both genetic predisposition and stochastic damage. During the gestational period and following parturition, similar damage can be seen due to the strenuous effect on the maternal body, exhibited on both the physiological and cellular level. In this review, we will focus on the similar physiological and cellular characteristics exhibited during pregnancy and aging, including induction of and response to oxidative stress, inflammation, and degradation of telomeres. We will evaluate any similar processes between aging and pregnancy by comparing common biomarkers, pathologies, and genetic and epigenetic effects, to establish the pregnant body as a model for aging. This review will approach the connection both in respect to current theories on aging as a byproduct of natural selection, and regarding unrelated biochemical similarities between the two, drawing on existing studies and models in humans and other species where relevant alike. Furthermore, we will show the response of the pregnant body to these changes, and through that illuminate unique areas of potential study to advance our knowledge of the maladies relating to aging and pregnancy, and an avenue for solutions.Background The most common complication of oblique lumbar interbody fusion (OLIF) is endplate fracture/subsidence. The mechanics of endplate fracture in OLIF surgery are still unclear. The aim of this study was to evaluate the biomechanical stability in patients undergoing OLIF surgery with stand-alone (SA) methods and bilateral pedicle screw fixation (BPSF). Methods A finite element model of the L1-L5 spinal unit was established and validated. Based on the validated model technique, L4-L5 functional surgical models corresponding to the SA and BPSF methods were created. Simulations employing the models were performed to investigate OLIF surgery. A 500 N compression force was applied to the superior surface of the model to represent the upper body weight, and a 7.5 Nm moment was applied to simulate the six movement directions of the lumbar spinal model flexion/extension, right/left lateral bending and right/left axial rotation. Finite element (FE) models were developed to compare the biomechanics of the SA and BPSF groups. Results Compared to the range of motion (ROM) of the intact lumbar model, that of the SA model was decreased by 79.6% in flexion, 54.5% in extension, 57.2% in lateral bending, and 50.0% in axial rotation, and the BPSF model was decreased by 86.7% in flexion, 77.3% in extension, 76.2% in lateral bending, and 75.0% in axial rotation. Compared to the BPSF model, the maximum stresses of the L4 inferior endplate (IEP) and L5 superior endplate (SEP) were greatly increased in the SA model; the L4 IEP stress was increased to 49.7 MPa in extension, and the L5 SEP stress was increased to 47.7 MPa in flexion, which were close to the yield stress of the lamellar bone (60 MPa). Conclusions OLIF surgery with BPSF could reduce the maximum stresses on the endplate, which may reduce the incidence of cage subsidence. OLIF surgery with the SA method produced more stress than BPSF, especially in extension and flexion motion, which may be a potential risk factor for cage subsidence.Background Trans-cell approach for the Neuroform Atlas stent is occasionally unsuccessful as a microcatheter can be stuck in the struts. FL118 manufacturer This study aimed to evaluate the passability and impassability of 0.0165-inch microcatheters through the Neuroform Atlas stent using a simplified benchtop model. Methods The distal struts of the target cell, referred to as the concave or convex crown, were found to interfere with microcatheter advancement during the trans-cell approach. The procedure was performed across each crown using the 1.7Fr SL-10 and 1.6Fr Headway Duo microcatheters, and it was repeated 20 times. We evaluated the procedural success rate, passability of each microcatheter using the maximum moving distance of the target crown in successful procedures, and device behaviors. Results The procedural success rate across the concave crown was significantly higher than that across the convex crown in both microcatheters. The maximum moving distance of the concave crown was significantly shorter in the Headway Duo microcatheter than in the SL-10 microcatheter.

