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Background: This study aims to explore the association between the quality of life (QoL) in children with Down syndrome (DS) and its relationship with demographic characteristics of both parents and children. The investigation encompasses five domains: physical and psychological well‐being, autonomy and parental relationship, social well‐being, and peers, as well as school and the learning environment. Method: An online questionnaire, the KIDSCREEN‐27, was used to measure the QoL of 112 families with DS in Saudi Arabia, referred to as "Parent‐Reported Measures." Descriptive statistics were analyzed using the Statistical Package for Social Sciences. Results: The study found that the QoL of children with DS showed high scores in the psychological well‐being, autonomy, parental relations, school, and learning environment domains. However, the physical and social well‐being and peer domains had lower scores, although still considered "good scores." Family income had a positively significant influence on all QoL domains. Specifically, higher family income was associated with better QoL outcomes, except for social well‐being. Parental age was found to influence psychological well‐being, while parental education and the relationship between the parent and child influenced social well‐being. Lastly, the child's gender was found to have an impact on the school and learning environment domain. Conclusion: The study highlights the importance of understanding the impact of the demographic variability of children with DS and their parents on the QoL of their children. It emphasizes the need to address the needs of families with lower incomes and the importance of parental education and relationships with their children in improving social well‐being. The findings could aid policymakers and healthcare providers in improving the QoL for families with children who have DS. This study aims to determine the relationship between demographic variables of parents with down syndrome (DS) children and their quality of life (QoL). It is the first time to use the Arabic version KIDSCREEN questionnaire, after validation. This is the first study to measure the demographic variables influence on the reported QoL of children with DS. This study found that family income influenced all QoL domains except social well‐being. Psychological well‐being was influenced by parental age. Social well‐being was influenced by parental education. Finally, the school and learning environment was influenced by the child's gender. [ABSTRACT FROM AUTHOR]

The transport of N‐methyl‐d‐aspartate receptors (NMDARs) is crucial for neuronal plasticity and synapse formation. Here, we show that KIF3B, a member of the kinesin superfamily proteins (KIFs), supports the transport of vesicles simultaneously containing NMDAR subunit 2A (NR2A) and the adenomatous polyposis coli (APC) complex. Kif3b+/− neurons exhibited a reduction in dendritic levels of both NR2A and NR2B due to the impaired transport of NR2A and increased degradation of NR2B. In Kif3b+/− hippocampal slices, electrophysiological NMDAR response was found decreased and synaptic plasticity was disrupted, which corresponded to a common feature of schizophrenia (SCZ). The histological features of Kif3b+/− mouse brain also mimicked SCZ features, and Kif3b+/− mice exhibited behavioral defects in prepulse inhibition (PPI), social interest, and cognitive flexibility. Indeed, a mutation of KIF3B was specifically identified in human SCZ patients, which was revealed to be functionally defective in a rescue experiment. Therefore, we propose that KIF3B transports NR2A/APC complex and that its dysfunction is responsible for SCZ pathogenesis. Synopsis: Altered synaptic surface expression of N‐methyl‐d‐aspartate receptors (NMDARs) affects neuronal function and has been linked to schizophrenia. Here, the kinesin KIF3B is shown to transport NMDAR subunit 2A (NR2A) into neuronal dendrites, with its disruption causing schizophrenia‐like phenotypes in mice. Kif3b+/− mice exhibit schizophrenia‐like behavioral phenotypes.KIF3B transports vesicles containing the NR2A complex into neuronal dendrites.A mutation in human Kif3b gene was identified in schizophrenia patients.The patient mutation‐carrying KIF3B is functionally defective and cannot rescue Kif3b+/− phenotypes. [ABSTRACT FROM AUTHOR]