Asthma is a chronic, recurrent and incurable allergy‐related respiratory disease characterized by inflammation, bronchial hyperresponsiveness and narrowing of the airways. Extracellular vesicles (EVs) are a universal feature of cellular function and can be detected in different bodily fluids. Recent evidence has shown the possibility of using EVs in understanding the pathogenesis of asthma, including their potential as diagnostic and therapeutic tools. Studies have reported that EVs released from key cells involved in asthma can induce priming and activation of other asthma‐associated cells. A literature review was conducted on all current research regarding the role and function of EVs in the pathogenesis of asthma via the PRISMA statement method. An electronic search was performed using EMBASE and PubMed through to November 2018. The EMBASE search returned 76 papers, while the PubMed search returned 211 papers. Following duplicate removal, titles and abstracts were screened for eligibility with a total of 34 studies included in the final qualitative analysis. The review found evidence of association between the presence of EVs and physiological changes characteristic of asthma, suggesting that EVs are involved in the pathogenesis, with the weight of evidence presently favouring deleterious effects of EVs in asthma. Numerous studies highlighted differences in exosomal contents between EVs of healthy and asthmatic individuals, which could be employed as potential diagnostic markers. In some circumstances, EVs were also found to be suppressive to disease, but more often promote inflammation and airway remodelling. In conclusion, EVs hold immense potential in understanding the pathophysiology of asthma, and as diagnostic and therapeutic markers. While more research is needed for definitive conclusions and their application in medical practice, the literature presented in this review should encourage further research and discovery within the field of EVs and asthma.

Background: Topical moisturizer is recommended for atopic dermatitis. Aims: The aim of the study was to investigate the knowledge gap regarding the efficacy of moisturizer in young patients. Methods: A systematic review and meta-analysis were conducted on randomised controlled trials comparing participant’s ≤15 years with atopic dermatitis, receiving either topical moisturizer or no moisturizer treatment. Certainty of evidence was assessed using the Grading of Recommendations, Assessment, Development and Evaluation (GRADE) framework. Results: Six trials were included (intervention n= 436; control n= 312). Moisturizer use extended time to flare by 13.52 days (95% confidence interval 0.05–26.99, I2 88%). Greater reduction in risk of relapse was observed during the first month of latency (pooled risk ratio 0.47, 95% confidence interval 0.31–0.72, I2 28%) compared to the second and third months (pooled risk ratio 0.65, 95% confidence interval 0.47–0.91, I2 35% and pooled risk ratio 0.63, 95% confidence interval 0.47–0.83, I2 33%, respectively).Treated patients were 2.68 times more likely to experience a three–six months remission (95% confidence interval1.18–6.09, I2 56%). Moisturizer minimally improved disease severity and quality of life. Limitations: There is a dire need to conduct randomised controlled trialswith more robust and standardised designs. Conclusion: Moisturizer benefits young patients with atopic dermatitis. However, more research is needed to better estimate its efficacy.