Notes

Ecological factors of E. coli, link with the actual diarrheal conditions, along with indication of weeknesses conditions within warm Gulf The african continent (Kapore, Burkina Faso).
In this study, three endoglucanases (EGs; Cel7B, Cel5B, and Cel12A), one cellobiohydrolase (CBH), and two auxiliary proteins (swollenin SWO1 and SWO4) were used to hydrolyze microcrystalline cellulose (MCC) for cellulose nanocrystal (CNC) preparation. The mixture experiment of the three EGs showed that high CNC yield was obtained when the ratio of Cel7B and Cel5B is 11.11 (protein weight). Moreover, the addition of CBH (1 mg/g) and SWO1 from Trichoderma reesei effectively increased the yield of CNC. On the basis of the results, the cellulase-producing strain of Penicillium oxalicum M12 was engineered to improve its cellulase system. An engineered strain of cEES performed well in CNC preparation. CNC with a yield of 11.79 % and a crystallinity of 83.85 % were produced using the crude enzyme from cEES as a means to hydrolyze MCC, and the size and shape of CNC were uniform and fusiform. Short staple microfibers (SSM) based on chitosan (CS) or silk fibroin (SF) were fabricated via the wet-rotate-spinning technique and employed to adsorb hexavalent chromium from aqueous solution. Adsorption efficiencies, physicochemical and morphological properties of CS and SF-SSM were systematically investigated and evaluated before and after adsorption of Cr(VI) using different techniques like ATR-FTIR, TGA, XRD, XPS, and SEM. CS and SF-SSM showed removal efficiency (>90 %) toward Cr(VI) ions. Pseudo-second order kinetic and Langmuir isotherm models could describe the Cr(VI) ions uptake process. Considering the inexpensive, sustainability and higher adsorption capacity of CS and SF-SSM hold great promising applications as natural adsorbent materials for removing different hazardous metals from aqueous medium. Antibacterial dressing can prevent the occurrence of many infections of wounds. Bacterial cellulose (BC) has the ability to carry and transfer the medicine to achieve a wound healing bandage. In this study, Carbon Quantum Dots-Titanium dioxide (CQD-TiO2) nanoparticles (NP) were added to BC as antibacterial agents. FTIR Spectroscopy illuminated that NPs were well-bonded to BC. Interestingly, MIC test proved that BC/CQD-TiO2 nanostructure (NS) has anti-bacterial properties against Staphylococcus aureus. The findings indicated that, CQD-TiO2 NPs have stronger antibacterial properties with better tensile strength compared to CQD NPs, in a concentration-dependent manner. Toxicity of CQD-TiO2 NPs on human L929 fibroblast cells was also evaluated. Most importantly, the results of the scratch test indicated that the NS was effective in wound healing in L929 cells. The approach in this study may provide an alternative to make an antibacterial wound dressing to achieve an effective drug-based bandage. Aquatic protein hydrolysates are usually associated with unpleasant odors and high fat content, which seriously restricts their industrial utilization. In this study, chitosans with different molecular weights produced by hydrogen peroxide degradation were applied to establish a flocculation method, using for the deodorization and defatting of oyster (Crassostrea gigas) hydrolysates. GC-MS analysis showed that the method markedly decreased the content of the fishy odor constituents. Up to 92 % fat and part of the heavy metals were effectively removed. Protein recovery percentage and solid recovery percentage were 83.43 ± 0.35 % and 76.36 ± 0.52 %, respectively, at the optimum dose (150 mg/L) of chitosan (83 % of deacetylation degree, 77 kDa). Thus, chitosan flocculation-coupled centrifugation (5000g, 1 min) can effectively solve the current drawbacks of engineering disc centrifuges and can be industrially used for defatting and deodorization during aquatic food processing. Biopolymers as films are defined as materials prepared from biological molecules with filmogenic morphology that can be versatile uses. The present research aimed to study formulations of natural polymeric composites based on babassu coconut mesocarp (BCM), alginate and glycerol, to verify the effect of these components on moisture, solubility, thickness and water vapor permeability (WVP) parameters for different cross-linking stages. After a second cross-linking was applied, they presented lower thickness, solubility, and WVP values than first cross-linking. Consecutive analyses for selected film formulations showed that the formulation to solutions of 400 mL with 3g of BCM, 7.5g of alginate and 4.0g of glycerol had the most promising results when correlating physical parameters with thermal analyses, chemical and mechanical properties. Films with amount of babassu coconut mesocarp in the proportion established were sturdy to solubility, leaching and thermal degradation, improved by second cross-linking applied. Neural differentiation is a complex process regulated by multiple signaling at different regulatory levels. Though great progresses have been made in understanding the mechanisms of neural differentiation, post-translational regulation of neural differentiation remains largely unknown. In this study, we found Prmt4, one of the methyltransferases catalyzing protein arginine methylation, is highly expressed in neural stem cells (NSCs) and associated with neural differentiation. Knockout of Prmt4 in mESCs blocked neural differentiation by inhibiting NF-κB activation. Mechanistically, Prmt4 interacts with NF-κB component p65 to promote its methylation, resulting in increased activation of NF-κB signaling during neural differentiation. Our study not only identified Prmt4 as novel regulator of neural differentiation, but also highlighted the importance of protein arginine methylation in cell fate transition. Persisted myelin debris inhibit axon regeneration and contribute to further tissue damage after spinal cord injury (SCI). The traditional view is that myelin debris is mainly cleared by microglia and macrophages, while astrocytes cannot directly engulf myelin debris because they are absent from lesion core. Here, we definitely showed that astrocytes could directly uptake myelin debris both in vitro and in vivo to effectively complement the clearance function. Therefore, it can be shown that astrocytes can exert myelin clearance effect directly and indirectly after spinal cord injury. The damaged myelin debris was transported to lysosomes for degradation through endocytosis pathways, finally resulting in excessive gliosis. This process may be a potential target for regulating neural tissue repair and excessive glia scar formation after SCI. OBJECTIVE Tumor associated macrophages (TAMs) promoted pancreatic ductal adenocarcinoma (PDAC) initiation and progression. In this study we aimed to evaluate CD10 expression by monocytes/macrophages and its clinical significance in PDAC. METHODS Human CD14+ peripheral blood monocytes were isolated and cultured for 6-7 days to differentiate into macrophages in vitro. Monocytic THP-1 cells were cultured and treated with 100 ng/ml phorbol 12-myristate 13-acetate (PMA) for 72 h to induce macrophage differentiation. Reverse transcription-quantitative PCR, immunohistochemistry, immunofluorescence, multiplex immunohistochemical staining and flow cytometry were performed to detect CD10 expression. In addition, the correlations between CD10 expression and immune cells infiltration were investigated through TIMER or GEPIA. Finally, Kaplan-Meier plotter and GEPIA databases were adopted to evaluate the influence of CD10 on clinical prognosis. RESULTS Our results indicated that CD10 was expressed by a subset of human monocytes and many more cells expressed CD10 after differentiation into macrophages in vitro (13.19% vs. Fluspirilene 41.39%; P less then 0.0001). As for PDAC tissues, CD10 was correlated with immune cells infiltration and was expressed by a subset of TAMs. For THP-1 cells, PMA could induce CD10 expression through the MAPK pathway. The Kaplan-Meier plotter results suggested that CD10 expression had an impact on the prognosis of PDAC. CONCLUSIONS In this study we demonstrated that CD10 was expressed by human primary monocytes, human monocyte-derived macrophages and TAMs, and was correlated with poor prognosis in PDAC, suggesting CD10 to be a potential therapeutic target in PDAC. Rodent models of chronic restraint stress (CRS) are often used as simple models of depressive disorder. However, these models of stress have been mainly developed in rats, and the behavioral phenotypes of CRS models are still controversial. In this study, we compared the physiological and behavioral responses of C57BL/6J (B6) and BALB/c mice, which are commonly used in genetic and behavioral studies, to CRS. In addition to measuring physiological parameters and the levels of corticosterone (a stress hormone) in response to stress, we also examined changes in the levels of testosterone (an anti-stress hormone), which have rarely been studied in stressed mice. The mice were exposed to CRS for 6 h a day for 21 days. In both B6 and BALB/c mice, CRS elicited several physiological stress responses, including decreased body weight gain and changes in the tissue weights of stress-related organs. Accumulated corticosterone in the hair was measured, and BALB/c mice had significantly greater levels than control mice and B6 mice after CRS. On the other hand, in the case of accumulated testosterone in the hair, both B6 mice and BALB/c mice showed significantly higher concentrations than control mice, but the degree of change was not different between the two strains. In the sucrose preference test, BALB/c mice, but not B6 mice, showed anhedonia-like behavior after CRS. However, neither strain showed depressive-like behavior in the forced swim or tail suspension test. Our results show that the physiological and behavioral stress responses of BALB/c mice are greater than those of B6 mice, although anti-stress responses to CRS are similar in both strains. This suggests that BALB/c mice are likely to be advantageous for use as a CRS-induced depression model. Oligodendrocyte precursor cells (OPCs) are ideal therapeutic cells for treatment of spinal cord injuries and diseases that affect myelin. However, it is necessary to generate a cell population with a low risk of teratoma formation and oncogenesis from a patient's somatic cells. In this study, we investigated the direct reprogramming of fibroblasts to oligodendrocyte-like cells in one step with a safe non-genetic delivery method that used protein transduction. Cell morphology and the lineage-specific marker expression profile indicated that human foreskin fibroblasts (HFFs) were converted into oligodendrocyte-like cells by the application of pluripotency factors and the use of a permissible induction medium. Our data demonstrated that SOX2 was sufficient to directly drive OPC fate conversion from HFF by a genetic-free approach. Therefore, this work has provided a strategy to OPC reprogramming by a non-integrating approach for future use in disease modeling and may ultimately provide applications for patient-specific cell-based regenerative medicine. Protein binding events on RNA are highly related to RNA secondary structure, which affects post-transcriptional regulation and translation. However, it remains challenging to describe the association between RNA secondary structure and protein binding events. Here, we present Structure Motif Analysis tool (SMAtool), a pipeline that integrates RNA secondary structure and protein binding site information to profile the binding structure preference of each protein. As an example of applying SMAtool, we extracted the RNA-structure and binding site information respectively from the DMS-seq and eCLIP-seq data of the K562 cell-line, and used SMAtool to analyze the structure motif of each RNA binding protein (RBP). This new approach provided results consistent with X-ray crystallography data from the protein data bank (PDB) database, demonstrating that it can help researchers investigate the structure preference of RBP, and understand the role of RNA secondary structure in gene expression. Availability and implementation https//github.
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