Granisetron, a serotonin 5-HT(3) receptor antagonist, widely used as an antiemetic drug following chemotherapy, has been found to improve learning and memory. In this study, effects of granisetron on spatial recognition memory and fear memory and the involvement of nitric oxide (NO) have been determined in a Y-maze and passive avoidance test. Granisetron (3, 10mg/kg, intraperitoneally) was administered to scopolamine-induced memory-impaired mice prior to acquisition, consolidation and retrieval phases, either in the presence or in the absence of a non-specific NO synthase inhibitor, l-NAME (3, 10mg/kg, intraperitoneally); a specific inducible NO synthase (iNOS) inhibitor, aminoguanidine (100mg/kg); and a NO precursor, l-arginine (750 mg/kg). It is demonstrated that granisetron improved memory acquisition in a dose-dependent manner, but it was ineffective on consolidation and retrieval phases of memory. The beneficial effect of granisetron (10mg/kg) on memory acquisition was significantly reversed by l-NAME (10mg/kg) and aminoguanidine (100mg/kg); however, l-arginine (750 mg/kg) did not potentiate the effect of sub-effective dose of granisetron (3mg/kg) in memory acquisition phase. It is concluded that nitric oxide is probably involved in improvement of memory acquisition by granisetron in both spatial recognition memory and fear memory. This article is part of a Special Issue entitled The Cognitive Neuroscience.
Objectives
This study aims to understand acceptable strategies to enhance the COVID-19 vaccine uptake among mothers who have no intention to vaccinate their children.
Methods
In a cross-sectional study, using an online survey in March 2021, we evaluated the variables within the Health Belief Model (severity, susceptibility, benefits, barriers and cues to action) along with parents’ sociodemographic characteristics, previous COVID-19 infection, job loss due to COVID-19 pandemic and the presence of healthcare workers among the household. Total number of children in the household and their chronic health conditions were also assessed. Multivariable logistic regression was performed to evaluate the intention to vaccinate children against the COVID-19 and associations with other variables.
Key findings
The survey response rate was 32.30% (595/1842). Most of the participants were White (72.1%), 31–40 years old (55.46%) and married or in a cohabiting relationship (90.25). Out of 595 mothers with 3–15 years old children, 38.32% had no intention to vaccinate their children. Top factors associated with intention were perceived susceptibility (P = 0.002), benefits (P < 0.001), barriers (P < 0.001), cues to action (P < 0.001) and the presence of healthcare workers in the household (P = 0.032). The main barriers were concerns about vaccine safety, efficacy and side effects. The strongest cue to action was enough information being provided followed by doctors’ recommendations.
Conclusions
Strategies to increase vaccination for children lie in the process of convincing parents with providing reliable information on the vaccine safety, efficacy and side effects by paediatricians and other healthcare providers.
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