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Ubiquitin C-terminal hydrolase-L1 (UCH-L1) is one of the promising candidates, with an acceptable diagnostic value for predicting head computed tomography (CT) scan findings. However, there has been a controversy between studies and still, there is no general overview on this. Therefore, the current systematic review and meta-analysis attempted to estimate the value of UCH-L1 in predicting intracranial lesions in traumatic brain injury.
Several lines of evidence have supported the potential involvement of metal ions in the etiology of Alzheimer's Disease (AD). However, the molecular mechanisms underlying this interaction are still partially unknown. Previous work from our laboratory has shown that β-amyloid peptide (Aβ) aggregation was strongly influenced by the conjugation of the peptide with few metal ions (aluminum, copper, zinc, and iron) that are found in high concentrations in the senile plaque core. The binding of aluminum (Al) to Aβ specifically stabilized the peptide in an oligomeric conformation. Here, we show that the aggregation of Aβ-Al was boosted by sodium dodecyl sulfate, a detergent that mimics some characteristics of biological membrane, suggesting a potential role for membrane components in the Aβ aggregation process. Notably, we also found that Aβ-Al caused mitochondrial dysfunction and reactive oxygen species production in primary cortical neurons. Aβ-Al strongly promoted also alterations in cytoskeleton network as shown by the increased F-actin expression and the occurrence of neuritic beading. Interestingly, the neurotoxic effect of this metal complex was associated with a decreased mRNA expression of ubiquitin thiolesterase, an ubiquitin-dependent protein involved in catabolic process, and by the increased expression of glutaminyl cyclase, responsible for pathological post-translational modification of Aβ. These results suggest that, in neuronal cells, Aβ-Al can induce relevant detrimental changes that resemble pathological hallmarks of AD.
Estrogens have profound effects on the developing prostate and are suspected to contribute to the development of benign prostatic hyperplasia, but the mechanism by which this hormone elicits its regulatory function still remains largely unknown. Using complementary RNA microarrays comprising approximately 10,000 oligonucleotide gene targets we compared differences in mRNA expression of estradiol-treated and untreated prostatic stromal cells in vitro. Based on a threshold of greater than twofold change, 228, 241, and 464 of the expressed genes were found to be regulated by estradiol after 10, 24, and 48 h of treatment, respectively. The secondary analysis of one estradiol-activated transcript, namely lipopolysaccharide-binding protein, and four estradiol-repressed genes, namely ras homolog gene family member E (RhoE/Rnd3), ubiquitin thiolesterase, interleukin 6, and interleukin 8 (IL-8), by real-time quantitative PCR confirmed the results of the microarray analysis. Moreover, IL-8 and RhoE were found to be down-regulated by estradiol at the protein level as well. We identified a set of genes involved in a wide range of cellular functions that are potentially important for understanding the molecular basis of estradiol action in the prostate.
The present study aimed to investigate whether prucalopride, as a 5‑hydroxytryptamine 4 (5‑HT4) receptor agonist, improved intestinal motility by promoting the regeneration of the enteric nervous system (ENS) in rats with diabetes mellitus (DM). A rat model of DM was established using an intraperitoneal injection of streptozotocin. The rats were randomly divided into four groups of 6 rats/group: Control, DM (DM model), DM + A (5 µg/kg prucalopride) and DM + B (10 µg/kg prucalopride). The rats in the Control group were given an equal volume of citric acid solvent. After successful model establishment, high blood glucose levels were maintained for 2 weeks before administration of prucalopride. The colonic transit time was measured using the glass bead discharge method. It was revealed that the colonic transit time of diabetic rats was the longest, and this was significantly shortened in the DM + B group. Subsequently, the colons were collected. The expression levels of Nestin, glial fibrillary acidic protein (GFAP), SOX10, RNA‑binding protein human antigen D (HuD) and ubiquitin thiolesterase (PGP9.5) were determined via immunohistochemical analysis. Immunofluorescence double staining of 5‑HT4 + Nestin and Ki67 + Nestin was performed. The 5‑HT level was measured using ELISA. Compared with that in the control group, Nestin expression was significantly increased in the DM and DM + A groups, and it was concentrated in columnar epithelial cells and the mesenchyme. Furthermore, the expression levels of Nestin in the DM + A group were higher than those in the DM group. No difference was observed in the expression levels of Nestin between the DM + B group and the Control group. The expression levels of 5‑HT protein were highest in the Control group; however, the expression levels of 5‑HT protein in the DM group, DM + A group and DM + B group exhibited an increasing trend. Similar trends in the expression of 5‑HT4 and Nestin were not observed; however, similar trends in the expression of Nestin and Ki67 were observed. The expression levels of GFAP, SOX10, PGP9.5 and Ki67 in the DM + A and DM + B groups were higher compared with those in the DM group. In the DM + A group, HuD expression was decreased compared with that in the Control group but it was markedly higher compared with that in the DM group. In conclusion, prucalopride may improve intestinal motility by promoting ENS regeneration in rats with DM.
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