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Raynaud's phenomenon (RP) is common, affecting approximately 5% of the population, and is important to the rheumatologist because it is often the presenting symptom of connective tissue disease, especially of systemic sclerosis (SSc)-spectrum disorders. RP therefore provides a window of opportunity for early diagnosis. When RP is associated with SSc it is particularly challenging to treat. This review begins with a discussion of some of the recent advances in our understanding of the pathogenesis of RP it is through increased understanding of the complex pathophysiology of RP that we are most likely to develop new therapies. The following questions are then addressed (with three clinical scenarios demonstrating key principles of assessment and management) 1. How can we predict underlying connective tissue disease in the patient presenting with Raynaud's? 2. How can we measure severity of Raynaud's? 3. What are the latest advances in treatment of connective tissue disease-related digital vasculopathy? BACKGROUND The emergency department (ED) is the natural venue for the provision of acute unscheduled care. However, little is known about the nature and proportion of this care that goes to addressing adverse events (AEs)-physical injury to a patient due to health care that requires some intervention-that are present on arrival (POA) to the ED. Described here are AEs that are POA, and population prevalence estimates for these events. METHODS This retrospective observational study tested the ED Trigger Tool, using data from an urban academic medical center. Patients aged ≥18 completing an ED visit were eligible (N = 92,859). A total of 5,582 visits with triggers (findings that increase the likelihood of an AE) were reviewed using the two-tier trigger approach. AEs were categorized by severity, type, and whether they were POA. POA AEs, and sociodemographic and trigger associations with AEs are described. RESULTS Of 1,181 AEs identified, 718 (60.8%) were POA to the ED. Patients with POA AEs were more often white (51.1% vs. 39.7%, p less then 0.001) and older (median age 62 vs. 50, p less then 0.001). The majority of POA AEs were medication-related and patient care-related events. In the population at this center, POA AEs account for an estimated 7.6% of ED visits (95% confidence interval = 6.9%-8.2%). CONCLUSION In this single-center study, the majority of AEs detected using the ED Trigger Tool were POA. These findings highlight the importance of the ED as a safety net for harm occurring across the health system. As an imidazoline I1 receptor agonist with very weak binding affinity for α2-adrenoceptors, moxonidine is commonly used in the treatment of hypertension. Moxonidine also has been implicated to act centrally to reduce airway vagal outflow. However, it is unknown at which central sites moxonidine acts to affect airway vagal activity, and how moxonidine takes effect at synaptic and receptor levels. In this study, airway vagal preganglionic neurons (AVPNs) were retrogradely labeled in neonatal rats from the intrathoracic trachea; retrogradely labeled AVPNs in the external formation of the nucleus ambiguus (NA) were identified in rhythmically active medullary slices using whole-cell patch-clamp techniques; and the effects of moxonidine on the spontaneous excitatory postsynaptic currents (EPSCs) of AVPNs were observed at synaptic level. The results show that moxonidine (10 μmol·L-1) significantly inhibited the frequency of spontaneous EPSCs in both inspiratory-activated and inspiratory-inhibited AVPNs. This effect was partially blocked by SKF-86466 (10 μmol·L-1), a highly selective antagonist of α2-adrenoceptors, or AGN-192403, a selective antagonist of imidazoline I1 receptors, and was completely blocked by efaroxan (10 μmol·L-1), an antagonist of both α2-adrenoceptors and imidazoline I1 receptors. These results demonstrate that moxonidine inhibits the excitatory inputs to AVPNs via activation of both α2-adrenoceptors and imidazoline I1 receptors, and suggest that physiologically both of these two types of receptors are involved in the central regulation of airway vagal activity at preganglionic level. Moxonidine might be potentially useful in diseases with aberrant airway vagal activity such as asthma and chronic obstructive diseases. Alzheimer's disease (AD) is the most common form of dementia and is characterized pathologically by Aβ plaques. Current treatments are purely symptomatic despite decades of intensive research interest. Notably, patients with the APOE4 allele are at increased risk for developing AD. One hypothesis regarding the mechanism by which the APOE4 allele might increase AD risk is loss of adaptive function, raising the possibility that the exogenous administration of apoE mimetics would have therapeutic effects. In this study, we utilized a previously characterized murine model of AD containing human APP, PS1 and APOE4TR, the APP/PS1/APOETR mouse. We treated male APP/PS1/APOETR mice with the apoE mimetic CN-105 or vehicle for 40d, beginning either at 14-18 or 25-28 weeks of age. After termination of treatment we tested animals in both Morris water maze and contextual fear conditioning, and examined soluble Aβ by biochemistery and Aβ deposition in cortex by unbiased stereology. We found that transient treatment with CN-105 for 40d beginning at 14-18 weeks reduced Aβ pathology and rescued memory deficits in male APP/PS1/APOETR mice. Notably, delaying treatment onset to 25-28 weeks did not produce as robust an effect. selleck These results suggest CN-105 treatment in a mouse model of AD results in a reduction in AD pathology and improved behavioral outcomes when administered early in the course of disease. As CN-105 has an excellent safety profile and is already in clinical trials, these findings raise the possibility that CN-105 represents a novel and translatable therapeutic strategy for AD. V.The skin plays a key role in vector-borne diseases because it is the site where the arthropod coinoculates pathogens and its saliva. Lyme borreliosis, particularly well investigated in this context, is a multisystemic infectious disease caused by Borrelia burgdorferi sensu lato and transmitted by the hard tick Ixodes. Numerous in vitro studies were conducted to better understand the role of specific skin cells and tick saliva in host defense, vector feeding, and pathogen transmission. The skin was also evidenced in various animal models as the site of bacterial multiplication and persistence. We present the achievements in this field as well as the gaps that impede comprehensive knowledge of the disease pathophysiology and the development of efficient diagnostic tools and vaccines in humans.
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