Notes

A whole new 7',9-epoxylignan from the stems of Salacia chinensis.
Alzheimer's disease (AD) is the most common type of dementia caused by severe neurodegeneration in the hippocampus and neocortical regions of the brain. In addition to neurodegeneration, AD brains contain high levels of amyloid plaques (APs) and neurofibrillary tangles (NFTs) which are used as neuropathological hallmarks of the disorder. Despite intense research efforts, the mechanism(s) of the AD neurodegeneration are imperfectly understood, hampering efforts for the development of efficient therapeutics. selleck chemicals Furthermore, failure of clinical trials to benefit AD patients suggests that AD hallmarks are poor therapeutic targets and supports the suggestion that these hallmarks are sequelae of neurodegeneration. Although genetic evidence seem to support the amyloid theory of AD, additional empirical observations and experimental data are inconsistent with the amyloid/Aβ theories of AD [Robakis and Neve (1998), TINS vol. 21 pp.15-19; Robakis (2011) NBA vol. 32, pp 372-379]. This possibility is further supported by daicroglia are implicated in AD pathology.Introduction Chromosome 18q deletion syndrome (18q-) is a rare chromosomal disorder with phenotypic variability, including mental deficiency, short stature, hypotonia, cleft palate, and hearing impairment. We present a case with features of 18q- syndrome who had combined 18q partial monosomy and 18p partial trisomy. Material and methods A 50-year-old female patient was examined during the genetic counseling of her brother. She had a history of congenital cleft palate and developmental deficiency with hypotonia, hearing loss, and epilepsy until adulthood. Her family history was free of related cases. Karyotype analysis and comparative genomic hybridization array (aCGH) were performed in patient's blood samples. Results Clinical examination showed features of 18q- syndrome including hypotonia and tremor. Neuropsychological deficiency of moderate cognitive disorder was noticed. The patient's karyotype was normal. The aCGH analysis revealed 8 Mb deletion (del18q22.3q23) and 7.2 Mb duplication (dup18p11.32p11.23). Conclusion Almost all patients' clinical features were associated with 18q- syndrome. There are very few reported cases with similar genotype possibly caused by a de novo unequal recombination mechanism.Introduction Sleep disorders, including insomnia and extreme sleep times, adversely affect the risk of developing illnesses and contribute to increased mortality rates. The aim of the study was to investigate sleep disorders experienced by hemodialysis patients in order to draw useful conclusions and to propose solutions to address this serious problem. Material and method This is a cross-sectional study, and the study sample consisted of 120 patients undergoing hemodialysis from February to April 2017 at a general hospital in Greece. The main tools of the survey were the Athens Insomnia Scale, the Berlin Questionnaire, and the RLS (Restless Legs Syndrome) Questionnaire. Results Most of the patients were males (68.3%), aged 68.1 ± 14.1 years. Half of the responders suffered from insomnia. About two thirds were at low risk for sleep apnea. Most of the responders suffered from restless legs syndrome (62.5%). Insomnia was significantly associated with higher BMI (RR 0.180; 95% CI [0.032, 1.003]), analgesics receiving (RR 0.125; 95% CI [0.031, 0.513]), hypnotics receiving (RR 0.072; 95% CI [0.010, 0.533]), and restless legs syndrome (RR 2.281; 95% CI [1.179, 4.413]) after adjusting for sociodemographic variables.Sleep apnea was significantly linked to analgesics (RR 0.309; 95% CI [0.093, 1.027]; p = 0.045). RLS was significantly tied to hypnotics (RR 0.077; 95% CI [0.008, 0.745]; p = 0.027) and insulin (RR 0.019; 95% CI [0.001, 0.542]; p = 0.020). Conclusions Sleep disorders are common symptoms among hemodialysis patients. The restless legs syndrome occurs at a lower frequency among hemodialysis patients but is a major problem for them.Drug addiction is a chronic relapsing disorder and a burden to society and individuals. The toxicity induced by drugs related with addiction may trigger dysfunction and death of cells of the central nervous system. The study of alterations of proteins and biomarkers in buccal cells would be beneficial in understanding drug addiction, as the buccal mucosa is of ectodermal origin such as the central nervous system. Method Buccal smears of 35 individuals with addictive disorders (20) or substance use disorders (15) for more than 3 years were collected by the gentle brushing of the inside of the cheeks. Immunocytochemical staining of IL-1β, IL-6, TNF-α, NFKβ, bcl-2, and ucp4 was performed on the epithelial cells, for the study of oxidative stress, toxicity, and inflammation. Papanicolaou staining was also performed for the potential structural disorders. There was a correlation with the clinical profile of each individual. None of the individuals was HIV or Tbc positive. Results Cytomorphology and immunoprofile of the smears of chronic relapsers and substance users for more than 3 years revealed karyolitic cells undergoing necrosis and increased expression of the markers IL-1β, IL-6, TNF-α, and NFKβ. Decreased expression of bcl2 was correlated with increased expression of ucp4. Conclusion The literature in the area of addiction is growing rapidly; however, the results are still mixed. Given the complexity of the problem, the goal should be the discovery of a minimal invasive and inexpensive diagnostic procedure to identify a prognostic and therapeutic target. The correlation of the expression of biomarkers on buccal cells could be valuable for the design of predictive and therapeutic strategies.Alzheimer's disease and other neurodegenerative diseases have long preclinical phases with active and progressively irreversible pathology. Therefore, biomarkers are essential for identifying patients early in the course of these diseases, when they may benefit the most from disease-modifying interventions. A limitation of biomarkers measured in the soluble phase of blood is their tenuous link to brain pathology. A new approach to biomarker discovery that addresses this limitation is deriving extracellular vesicles (EVs) enriched for neuronal and astrocytic origin from peripheral blood. EVs are membranous particles (subdivided into smaller exosomes and larger microvesicles) that are shed by all cells and found in all biofluids. Neuronal and astrocytic EVs have been implicated in the pathogenesis of several neurodegenerative diseases. Given their origin, neuronal and astrocytic enriched EVs harvested from blood can be used to interrogate brain pathologic processes previously inaccessible in vivo. In a long series of case control studies based on these EV subpopulations, we have identified candidate protein biomarkers for Alzheimer's disease and other neurodegenerative diseases.
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