| خلاصه مقاله | Background: Melatonin is a neurohormone secreted predominantly by the pineal gland that is found to be associated with improving cognitive outcomes in Alzheimer’s Diseases (1). This research desires to evaluate the cognitive effects of exogenous melatonin supplementations in patients with multiple sclerosis (MS).
Methods: This study was executed following the PRISMA 2020 statement. Ovid, PubMed, Scopus, Embase, and Web of Science databases were searched for a comprehensive coverage of the published studies on this topic and there was not time and study design restriction.
Results: Out of 1304 results of database searches, finally, 3 RCTs, were included. Jalluoli and colleagues, in an RCT in 2022, studied the cognitive effects of nocturnal ingestion of 6 mg melatonin for 6 months in 14 RRMS patients, based on Montreal cognitive assessment (MoCA) and simple Reaction time (SRT), the results showed that melatonin could safely improve cognitive function in MS patients (2). Roostaei and colleagues established an RCT to observe the effects of 3mg melatonin for 12 months on motor, cognitive, and neuroimaging indices in 25 RRMS patients and the findings showed beneficial Cognitive outcomes in Modified Fatigue Impact Scale (MFIS) (3). Finally, self-reported cognitive function, in a cross-over RCT, Drake et al. in 31 patients with various subtypes (RRMS, SPMS, and PPMS) did not differed significantly between melatonin and placebo groups (4).
Discussion: This study found scattered, inconsistent and limited evidence regarding the cognitive efficacy of melatonin supplementation in MS, which suggested future well-designed clinical studies on this topic.
Funding: The research protocol was approved and supported by the Student Research Committee, Tabriz University of Medical Sciences (grant number: 70831). |