Neurodegenerative diseases, such as Alzheimer's, Parkinson's and Huntington's diseases, are all characterized by a component of innate immunity called neuroinflammation. Neuronal loss and neuroinflammation are two phenomena closely linked. Hence, the neuroinflammation is a relevant target for the management of the neurodegenerative diseases given that, to date, there is no treatment to stop neuronal loss. Several studies have investigated the potential effects of activators of alpha 7 nicotinic acetylcholine receptors in animal models of neurodegenerative diseases. These receptors are widely distributed in the central nervous system. After activation, they seem to mediate the cholinergic anti-inflammatory pathway in the brain. This anti-inflammatory pathway, first described in periphery, regulates activation of microglial cells considered as the resident macrophage population of the central nervous system. In this article, we shortly review the agonists of the alpha 7 nicotinic acetylcholine receptors that have been evaluated in vivo and we focused on the selective positive allosteric modulators of these receptors. These compounds represent a key element to enhance receptor activity only in the presence of the endogenous agonist.

Neuroinflammation is a key component of the pathophysiology of neurodegenerative diseases. The link between nicotine intake and positive outcome has been established, suggesting a role played by nicotinic receptors (nAChRs), especially α7nAChRs. The objective of this study was to evaluate the potential dose effects of PHA 543613 on neuron survival and striatal microglial activation in a rat model of brain excitotoxicity. A preliminary study was performed in vitro to confirm PHA 543613 agonist properties on α7nAChRs. Rats were lesioned in the right striatum with quinolinic acid (QA) and received either vehicle or PHA 543613 at 6 or 12mg/kg twice a day until sacrifice at Day 4 post-lesion. We first compared the translocator protein quantitative autoradiography in QA-lesioned brains with [3H]DPA-714 and [3H]PK-11195. The effects of PHA 543613 on microglial activation and neuronal survival were then evaluated through [3H]DPA-714 binding and immunofluorescence staining (Ox-42, NeuN) on adjacent brain sections. We demonstrated that [3H]DPA-714 provides a better signal-to-noise ratio than [3H]PK-11195. Furthermore, we showed that repeated PHA 543613 administration at a dose of 12mg/kg to QA-lesioned rats significantly protected neurons and reduced the intensity of microglial activation. This study reinforces the hypothesis that α7nAChR agonists can provide beneficial effects in the treatment of neurodegenerative diseases through potential modulation of microglial activation.

Effective communication in healthcare, among professionals and between professionals and patients is crucial for delivering high-quality care. While simulation effectively translates technical skills to clinical practice, its impact on communication, particularly in pharmacies, is less well documented. This systematic review examined the impact of simulation-based education on communication skills among pharmacy students and pharmacists. It aims to identify the types of simulations used, the outcomes obtained, and the effectiveness of these simulations in enhancing communication skills, perception and confidence. We conducted searches in MEDLINE, LISSA, EMBASE, and PsycINFO for articles on communication training through simulation for pharmacy students and pharmacists. The search covered the period from inception to August 31, 2022. To be included, studies had to meet the following criteria: (i) target pharmacy student or graduate pharmacists; (ii) use simulation in the field of clinical pharmacy; (iii) provide a complete description of the outcome measure. Studies for which it was impossible to extract data specific to pharmacy students or simulation were excluded. Three investigators independently evaluated each title and If each investigator considered the citation eligible, six authors progressed to full-text review. The outcomes related to communication were categorized into three groups: perception of the importance of communication in delivering high-quality patient care, confidence in communication skills, and assessed communication proficiency. The quality of studies included in this review was assessed using the Mixed Methods Appraisal Tool (MMAT). The total number of participants was 3337. Among the 20 articles reviewed, which were primarily published in the United States over the last decade, only one focused on community pharmacists. Quasi experimental designs were predominant, and studies often relied on learners' self-assessments with non-validated questionnaires. Simulation-based learning aimed to enhance communication skills and attitudes across interprofessional contexts (involving nursing and medical students), patients, and families, frequently utilizing simulated patients. Studies evaluating outcomes have emphasized communication skills with patients and families, while those involving healthcare professionals often focused on perception of the importance of communication in delivering high-quality patient care. Despite study heterogeneity, this systematic review concluded that simulation-based training significantly enhances perception, confidence, and communication skills. The development of clear guidelines and standardized assessment tools to evaluate communication would significantly improve the validity and reliability of future research efforts (PROSPERO registration: n°CRD42022371915).

To date there is no treatment able to stop or slow down the loss of dopaminergic neurons that characterizes Parkinson's disease. It was recently observed in a rodent model of Alzheimer's disease that the interaction between the a7 subtype of nicotinic acetylcholine receptor (a7-nAChR) and sigma-1 receptor (s1-R) could exert neuroprotective effects through the modulation of neuroinflammation which is one of the key components of the pathophysiology of Parkinson's disease. In this context, the aim of the present study was to assess the effects of the concomitant administration of N-(3R)-1-azabicyclo[2.2.2]oct-3-yl-furo[2,3-c]pyridine-5-carboxamide (PHA) 543613 as an a7-nAChR agonist and 2-(4-morpholinethyl) 1-phenylcyclohexanecarboxylate (PRE)-084 as a s1-R agonist in a well-characterized 6-hydroxydopamine rat model of Parkinson's disease. The animals received either vehicle separately or the dual therapy PHA/PRE once a day until day 14 post-lesion. Although no effect was noticed in the amphetamine-induced rotation test, our data has shown that the PHA/PRE treatment induced partial protection of the dopaminergic neurons (15–20%), assessed by the dopamine transporter density in the striatum and immunoreactive tyrosine hydroxylase in the substantia nigra. Furthermore, this dual therapy reduced the degree of glial activation consecutive to the 6-hydroxydopamine lesion, i.e, the 18 kDa translocation protein density and glial fibrillary acidic protein staining in the striatum, and the CD11b and glial fibrillary acidic protein staining in the substantia nigra. Hence, this study reports for the first time that concomitant activation of a7-nAChR and s1-R can provide a partial recovery of the nigro-striatal dopaminergic neurons through the modulation of microglial activation. The study was approved by the Regional Ethics Committee (CEEA Val de Loire n°19) validated this protocol (Authorization N°00434.02) on May 15, 2014.

Neuroinflammation is a common element involved in the pathophysiology of neurodegenerative diseases. We recently reported that repeated alpha-7 nicotinic acetylcholine receptor (α7nAChR) activations by a potent agonist such as PHA 543613 in quinolinic acid-injured rats exhibited protective effects on neurons. To further investigate the underlying mechanism, we established rat models of early-stage Huntington's disease by injection of quinolinic acid into the right striatum and then intraperitoneally injected 12 mg/kg PHA 543613 or sterile water, twice a day during 4 days. Western blot assay results showed that the expression of heme oxygenase-1 (HO-1), the key component of the cholinergic anti-inflammatory pathway, in the right striatum of rat models of Huntington's disease subjected to intraperitoneal injection of PHA 543613 for 4 days was significantly increased compared to the control rats receiving intraperitoneal injection of sterile water, and that the increase in HO-1 expression was independent of change in α7nAChR expression. These findings suggest that HO-1 expression is unrelated to α7nAChR density and the increase in HO-1 expression likely contributes to α7nAChR activation-related neuroprotective effect in early-stage Huntington's disease.

Background: Central venous catheters offer considerable benefits, but their presence can expose patients to serious complications. Preventing such complications is crucial, not only for individual patients, but also for hospitals and the healthcare system. Objective: To assess the impact of educational interventions on clinical and non-clinical outcomes provided to patients with central venous catheters and/or their informal caregivers, regardless of the therapeutic indication, and to define the specific characteristics of effective educational strategies. Methods: Medline and Embase were searched, covering all publications since their inception to 13 August 2024. Articles on clinical and/or non-clinical outcomes related to the education of patients with central venous catheters and their informal caregivers were included. Studies focusing solely on the education of healthcare providers were excluded. The reference lists of included studies were hand searched for additional citations. This systematic review followed PRISMA guidelines and the protocol was registered in PROSPERO (CRD42024577193). The quality of the included studies was assessed using the Mixed Methods Appraisal Tool. Results: In total, 20 articles, representing 974 patients and 875 informal caregivers, were included in the review: seven randomized trials, ten quantitative studies without randomization, and three descriptive quantitative studies. The compliance rate of 60% for the randomised trials determined using the Mixed Methods Appraisal Tool indicates a low risk of bias, whereas non-randomised and descriptive quantitative studies show more methodological weaknesses (40% and 45%, respectively). There was a positive trend, significant or not, for the impact of patient education on reducing complications, particularly those related to infection (85% of the studies concerned by this outcome). This was often observed (64%) in studies based on educational interventions repeated over time. Studies that showed a significant improvement in patients’ knowledge and skills in terms of self-management showed beneficial results in terms of the occurrence of complications. Nurses were the most common educators (15/20), and the most frequently used tools were written materials and digital resources, often combined with other methods for greater effectiveness. Conclusions: This systematic review encourages the implementation of educational interventions for patients with central venous catheters and their informal caregivers, notably to decrease infections. Providing them with written documents and digital tools, and delivering them repeatedly over time, should be promoted. However, study heterogeneity limits definitive conclusions. Future research should standardize methodologies, involve patients in intervention design, and assess cost-effectiveness to ensure sustainable implementation.