A behavioral memory’s lifetime represents multiple molecular lifetimes, suggesting the necessity for a self-perpetuating signal. One candidate is DNA methylation, a transcriptional repression mechanism that maintains cellular memory throughout development. We found that persistent, gene-specific cortical hypermethylation is induced in rats by a single, hippocampus-dependent associative learning experience and pharmacologic inhibition of methylation one month after learning disrupted remote memory. We propose that the adult brain utilizes DNA methylation to preserve long-lasting memories.

While research has demonstrated an association between trauma and mental health, this study examined the association between trauma experienced premigration, during migration, and postmigration, and current mental health status among Latino youth aged 12-17 years old living in the US for < 3 years. Participants reported traumatic events experienced in their home country, during migration, and after settling in the US. Regression models examined trauma experienced at each stage of the migration process predicting current levels of depression, anxiety, and post-traumatic stress disorder. Two-thirds of youth experienced at least one traumatic event, 44% experienced an event once, and 23% experienced two or more traumatic events during migration. Trauma experienced at different migration stages was associated with distinctive mental health outcomes. It is essential that access to culturally sensitive assessment and treatment services be available to ensure transition to a healthy adulthood.

These mothers' feeding choices were influenced directly by their food values, and indirectly by the neighbourhood and school food environments via their children's preferences.

This paper describes the intervention model, early implementation experience, and challenges for the Seguridad, Apoyo, Familia, Educacion, y Recursos (SAFER) Latinos project. The SAFER Latinos project is an attempt to build the evidence for a multilevel participatory youth violence prevention model tailored to the specific circumstances of Central American immigrants. Specific circumstances targeted in this intervention are decreased family cohesion as a result of sequential immigration (i.e., parents arriving first and bringing their children years later or youth arriving without parents); multiple school barriers; community disorganization and low community efficacy; limited access to services; and a social context (including gang presence) that is linked to youth norms supporting violence. In its implementation, the initial intervention model was adapted to address barriers and challenges. These are described, along with lessons learned and the ongoing evaluation.

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