-
McCormick Lynggaard posted an update 1 week, 1 day ago
Quercetin, a flavonoid with possible neuroprotective action has been recently suggested for the early-stage treatment of Alzheimer’s disease. The low solubility and extended first pass effect render quercetin unsuitable for oral administration. Ipatasertib Alternatively, brain targeting is more feasible with nasal delivery, by-passing, non-invasively, Blood-Brain Barrier and ensuring rapid onset of action. Aiming to increase quercetin’s disposition into brain, nasal powders consisting of quercetin-cyclodextrins (methyl-β-cyclodextrin and hydroxypropyl-β-cyclodextrin) lyophilizates blended with spray-dried microparticles of mannitol/lecithin were prepared. Quercetin’s solubility at 37 °C and pH 7.4 was increased 19-35 times when complexed with cyclodextrins. link2 Blending lyophilizates in various ratios with mannitol/lecithin microparticles, results in powders with improved morphological characteristics as observed by X-ray Diffraction and Scanning Electron Microscopy analysis. In vitro characterization of these powders using Franz cells, revealed rapid dissolution and permeation 17 (methyl-β-cyclodextrin) to 48 (hydroxypropyl-β-cyclodextrin) times higher than that of pure quercetin. Ex vivo powders’ transport across rabbit nasal mucosa was found more efficient in comparison with the pure Que. The overall better performance of quercetin-hydroxypropyl-β-cyclodextrin powders is confirmed by ex vivo experiments revealing amount of quercetin permeated ranging from 0.03 ± 0.01 to 0.22 ± 0.05 μg/cm2 for hydroxypropyl-β-cyclodextrin and 0.022 ± 0.01 to 0.17 ± 0.04 μg/cm2 for methyl-β-cyclodextrin powders, while the permeation of pure quercetin was negligible.With the rapidly emerging field of autologous therapies, Single-Use (SU) technologies are increasingly used in personalized medicine due to their manifold advantages. Although qualification of the starting material of autologous therapies such as the CAR-T process has been highlighted, little attention has been paid to the effect of leachables on cell-based therapies, even if recent studies indicate interactions of leachables with cells. To close this gap, this study presents a risk-analysis of SU-material on a CAR-T process and identifies hazards imposed by tubing materials and leachables thereof. In order to represent a CAR-T process in its entirety, two test systems, namely a lentivirus production process and primary T-cells, were used. While the effects on lentivirus production are comparable to those reported for antibody production processes in CHO cells, we found that PVC material and corresponding leachables, i.e. plasticizer, inhibit cell growth of primary T-cells to a great extent. Additionally, our results indicate that critical quality attributes are affected by the PVC material.Cancer is becoming one of the deadliest disease in both developed as well as developing countries and continuous effort is being made to find innovative therapies for myriad types of cancers that afflict the human body. Therapeutic options for cancer have grown exponentially over the time but we are quite a way off from finding a magic bullet that can help cure cancer and based on the current evidence we may never find a catch all cure ever and it becomes crucial that we keep on innovating and find multiple ways to attack the menace of this dreaded disease. Many patients suffer recurrence of disease and require second-line or in some cases more than two lines of treatment. In this review article we have discussed the available therapies along with the newer advancements that have been made in cancer therapy. Latest developments in treatment of various cancers that have been discussed include gene editing using CRISPR/Cas9, theranostics, viral mediated therapy, artificial intelligence, tumor infiltrating lymphocyte therapy, etc.Transcriptome profiling of Vrindavani and Tharparkar cattle (n = 5 each) revealed that more numbers of genes were dysregulated in Vrindavani than in Tharparkar. A contrast in gene expression was observed with 18.9 % of upregulated genes in Vrindavani downregulated in Tharparkar and 17.8% upregulated genes in Tharparkar downregulated in Vrindavani. Functional annotation of genes differentially expressed in Tharparkar and Vrindavani revealed that the systems biology in Tharparkar is moving towards counteracting the effects due to heat stress. Unlike Vrindavani, Tharparkar is not only endowed with higher expression of the scavengers (UBE2G1, UBE2S, and UBE2H) of misfolded proteins but also with protectors (VCP, Serp1, and CALR) of naïve unfolded proteins. Further, higher expression of the antioxidants in Tharparkar enables it to cope up with higher levels of free radicals generated as a result of heat stress. In this study, we found relevant genes dysregulated in Tharparkar in the direction that can counter heat stress.The gene polymorphisms of ABCB1, EPHX1, and SCN1A were found to influence carbamazepine (CBZ) metabolism and resistance in epilepsy patients, but the relevance remains controversial. To reveal the relationships among the gene polymorphisms of ABCB1, EPHX1, SCN1A and the metabolism and resistance of CBZ, the databases of PubMed, EMBASE, Cochrane Library, Chinese National Knowledge Infrastructure, Chinese Science and Technique Journals, China Biology medicine disc and Wan Fang were retrieved for suitable studies up to April 2021. 18 studies containing 3293 epilepsy patients were included. The result revealed the gene polymorphism of ABCB1 c.3435C > T is significantly associated with altered concentration-dose ratios of CBZ (CDRCBZ) (CC vs. CT, OR = 0.25 (95% CI 0.08-0.42), P = 0.004), and EPHX c.416A > G gene polymorphism may also significantly adjusted the concentration-dose ratios of carbamazepine-10, 11-trans dihydrodiol (CDRCBZD) (AA vs. GG, OR = 0.48 (95% CI 0.01-0.96), P = 0.045; AG vs. GG, OR = 0.68 (95% CI 0.16-1.20), P = 0.010, respectively) and the ratio of CBZDcarbamazepine-10,11-epoxide (CBZE) (CDRCBZDCDRCBZE) (AG vs GG, OR = 0.83 (95% CI 0.31-1.36), P = 0.002). Furthermore, ABCB1 c.3435C > T polymorphism was also observed to be significantly influenced CBZ resistance (CC vs TT, OR = 1.78 (95% CI 1.17-2.72), P = 0.008; CT vs TT, OR = 1.60 (95% CI 1.12-2.30), P = 0.01; CC + CT vs TT, OR = 1.61 (95% CI 1.15-2.26), P = 0.006, respectively). Therefore, CBZ metabolism and resistance in patients with epilepsy may be adjusted by the gene polymorphisms of ABCB1 c.3435C > T and EPHX1 c.416A > G which provides the further scientific basis for clinical individualized therapy of epilepsy. link3 However, larger sample size studies are still needed to provide further conclusive evidence.Traditional methods to understand leukemia stem cell (LSC)’s biological characteristics include constructing LSC-like cells and mouse models by transgenic or knock-in methods. However, there are some potential pitfalls in using this method, such as retroviral insertion mutagenesis, non-physiological level gene expression, non-physiological expansion, and difficulty to construct. The mRNAsi index for each sample of the Cancer Genome Atlas (TCGA) could avoid these potential pitfalls by machine learning. In this work, we aimed to construct a network of LSC genes utilizing the mRNAsi. First, mRNAsi value was analyzed with expressions distributions, survival analysis, age, and gender in acute myeloid leukemia (AML) samples. Then, we used the weighted gene co-expression network analysis (WGCNA) to construct modules of stemness genes. The correlation of the LSC genes transcription and interplay among LSC proteins was analyzed. We performed functional and pathway enrichment analysis to annotate stemness genes. SurvivFC4 and RFC5, could be the therapeutic targets for inhibiting the stemness characteristics of AML. This work is also a comprehensive pipeline for future cancer stem cell studies.Tomato spotted wilt virus (TSWV) causes severe losses of tomato crops worldwide. To cope dynamically with such a threat, plants deploy strategies acting at the molecular and the epigenetic levels. We found that tomato symptoms progress in a specific-genotype-manner upon TSWV infection. Susceptible genotypes showed within the Auxin Response Factor (ARF8) promoter coupled to enhanced expression of miRNA167a, reduced ARF8 gene and decreased levels of the hormone auxin. This constitutes a deliberate attempt of TSWV to disrupt plant growth to promote spread in sensitive cultivars. Epigenetic regulation through the level of cytosine methylation and the miR167a-ARF8 module are part of a complex network modulating auxin-triggered synthesis and shaping tomato responses to TSWV. Furthermore, modulation of miR167a-ARF8 regulatory module could be applied in tomato-resistance breeding programs.The bovine leukemia virus (BLV) is the causative agent of enzootic bovine leukosis, the most common neoplastic disease in cattle. We previously developed the quantitative real-time PCR (qPCR) assay to measure the proviral loads of BLV using coordination of common motif (CoCoMo) degenerate primers. We here found four single mutations within the probe region of the original BLV-CoCoMo-qPCR assay, three of which have negative impact on its sensitivity in the probe sequences of the long terminal regions of the BLV-CoCoMo-qPCR-2 assay, using genomic DNA from 887 cows from 27 BLV-positive farms via a nationwide survey conducted in 2011 and 2017 in Japan. Therefore, the modified probes were designed to completely match the three BLV mutant strains identified here. Moreover, we examined the optimum ratio of the concentration to be mixed with the wild type and three new BLV TaqMan probes were designed here using genomic DNAs extracted from cattle naturally infected with the wild type BLV strain and three mutant strains. Finally, we successfully established an improved assay maintained the original sensitivity and reproducibility and can detect novel BLV strains.
We aimed to assess whether the modest major adverse cardiovascular events (MACE) reductions in previous trials testing combined blood pressure (BP) and low density lipoprotein cholesterol (LDL-C) reduction were due to modest risk factor reduction and/or a negative interaction, whereby the joint effects of therapy are less than expected.
We performed a systematic review of randomized controlled trials comparing patients who received combination BP and cholesterol lowering treatment versus placebo. We calculated the expected relative risk reduction (RRR) in MACE based on the observed reductions in systolic BP and LDL-C in each trial and previous meta-analysis of the individual modalities.
All five included trials achieved small SBP reductions (range 1 to 6mmHg) and small-to-moderate LDL-C reductions (range 0.5 to 1.1mmol/L), which were all less than expected. Each of the three largest trials achieved significant reductions in MACE and the observed vs expected RRRs were closely aligned – ASCOT observed RRR 32% (95% CI 18-43%) vs expected RRR 24% (95% CI 20-28%); HOPE-3 observed RRR 28%, (95% CI 10-42%) vs expected RRR 28% (95% CI 23%-31%); TIPS-3 observed RRR 20% (95% CI 0%-36%) vs expected RRR 21% (95% CI 18-24%).
MACE reductions seen in past trials of combined BP and LDL-C reflect the degree of risk factor reduction. Sustained and substantial reductions in BP and LDL-C (eg. ≥15mmHg and≥1.5mmol/L) are required to halve cardiovascular risk, which in turn requires long-term adherence to intensive LDL-C lowering and combination BP therapy.
MACE reductions seen in past trials of combined BP and LDL-C reflect the degree of risk factor reduction. Sustained and substantial reductions in BP and LDL-C (eg. ≥15 mmHg and ≥ 1.5 mmol/L) are required to halve cardiovascular risk, which in turn requires long-term adherence to intensive LDL-C lowering and combination BP therapy.