Melatonin reduces anxiety from glyphosateMelatonin attenuates affective disorders and cognitive deficits induced by perinatal exposure to a glyphosate-based herbicide via antioxidant pathway in adult male and female rats.
High relevance to anxiety treatment
Our research examined the effects of melatonin on anxiety and memory problems caused by exposure to glyphosate-based herbicides (GBH). We started with pregnant Wistar rats that were subjected to GBH during gestation and lactation. After weaning, the offspring were treated with melatonin to see if it could help mitigate the negative effects they experienced due to their early exposure.
We observed that exposure to GBH led to increased anxiety and depression-like behaviors in the rats. Additionally, it appeared to impair their memory function. In looking at oxidative stress markers in the brain regions associated with emotion and cognition, we found indications of increased stress—especially pronounced in the female offspring.
However, the inclusion of melatonin significantly reduced these anxiety levels and improved cognitive deficits. Interestingly, the benefits were notably greater in female rats compared to males, suggesting a potential sex-dependent response to melatonin treatment.
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Melatonin reduces pediatric anxiety, painThe impact of oral melatonin on pain and anxiety reduction during venipuncture in pediatric patients: a double-blind randomized clinical trial.
High relevance to pediatric anxiety treatment.
We focused on the effects of oral melatonin on anxiety and pain in children during the stressful process of venipuncture. In a double-blind, randomized controlled trial, we found that administering 0.5 mg/kg of melatonin 30 minutes before the procedure significantly reduced both pain and anxiety levels compared to a placebo.
The results showed that only 18.8% of the kids receiving melatonin reported pain, while 78.2% in the placebo group did. Furthermore, anxiety affected 44.6% of the melatonin group compared to 94.1% of those in the control group.
While melatonin appeared to improve experiences during venipuncture, its impact on the success rate was not statistically significant.
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We examined the potential of melatonin microneedles as a novel method for treating anxiety and regulating circadian rhythms. This study utilized silk fibroin to create microneedles that deliver melatonin transdermally, offering sustainable drug release for up to 11 hours.
During our research, we found that these microneedles maintain a stable blood drug concentration for eight hours post-application. This sustained delivery method was particularly beneficial for insomnia model rats, where we saw notable improvements in both sleep patterns and reductions in anxiety levels.
The findings indicate that melatonin microneedles effectively address disrupted circadian rhythms and alleviate anxiety symptoms. Our results suggest a promising avenue for improving treatment methods, especially for those struggling with sleep-related issues.
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Melatonin reduces anxiety post-surgeryRole of oral melatonin in prevention of postoperative delirium in patients undergoing elective surgery under general anesthesia: A Randomized controlled trial.
Moderate relevance due to confounding
In our study, we aimed to understand how melatonin might reduce anxiety and the risk of postoperative delirium in patients undergoing elective surgeries. We focused on 162 patients aged 40 to 80, evenly split into two groups—one receiving melatonin and the other receiving standard premedication with alprazolam and ranitidine.
We administered 3 mg of melatonin the night before the surgeries and monitored various outcomes related to anxiety and cognitive function. Remarkably, we found that the incidence of anxiety was significantly lower in those who took melatonin. Furthermore, patients reported better sleep quality, and cognitive function assessments indicated less cognitive dysfunction compared to the control group.
Our investigation highlighted the positive effects of melatonin, showing it not only lessens anxiety but also contributes to a smoother recovery post-surgery. This provides valuable insight for future practices in managing preoperative anxiety effectively.
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We explored the impact of prenatal constant light exposure (CLE) and melatonin treatment on anxiety-related behaviors in male and female rat offspring. In our study, six groups of rats were examined, with some experiencing a standard light/dark cycle while others were subjected to CLE. We treated these groups with either a saline solution or melatonin.
Through various anxiety assessments like the open field test and elevated plus maze, we observed that exposure to CLE led to significant behavioral deficits. Specifically, the rats showed heightened anxiety levels, alongside increased plasma cortisol levels. Surprisingly, melatonin treatment repaired these behavioral issues in a way that was different between sexes.
Even though melatonin did not change overall levels of melatonin in the bloodstream or normalize cortisol levels, it did boost the expression of specific brain receptors associated with mood regulation. This suggests that melatonin may hold therapeutic potential for addressing anxiety issues triggered by environmental factors experienced during prenatal development.
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