Print and digital reading habits and comprehension in children with and without special education needs.

BACKGROUND: Text comprehension is a major obstacle for many Primary school students with special education needs (SEN). Reading episodes bring students opportunities to be exposed to new vocabulary and knowledge, potentially boosting their development of text comprehension skills. AIMS: Our study seeks to understand how reading frequency (leisure and academic) and reading medium (print and digital) contribute to the development of text comprehension during Primary school in students with and without SEN. METHODS AND PROCEDURES: We tested 2289 Spanish students from fourth to sixth grade, from which 212 had an official decision of SEN. Students self-reported their reading frequency (as a measure of their reading habits) and completed a standardized text comprehension test. We employed multiple regression models with a robust maximum likelihood estimator to test associations between reading frequency and comprehension. OUTCOMES AND RESULTS: Students' comprehension was positively associated with their leisure print reading habits, and negatively associated with their frequency of academic digital reading. Those associations were independent of SEN status. CONCLUSIONS AND IMPLICATIONS: Results highlight the importance of promoting leisure reading in print to all students, regardless of SEN status. In addition, caution is advised when encouraging Primary school children to use digital texts when the emphasis is on comprehending texts for acquiring knowledge.

Therapeutic role of mesenchymal stem cell-derived extracellular vesicles in neuroinflammation and cognitive dysfunctions induced by binge-like ethanol treatment in adolescent mice.

BACKGROUND: Extracellular vesicles (EVs) are heterogeneous membrane vesicles secreted by cells in extracellular spaces that play an important role in intercellular communication under both normal and pathological conditions. Mesenchymal stem cells (MSC) are anti-inflammatory and immunoregulatory cells capable of secreting EVs, which are considered promising molecules for treating immune, inflammatory, and degenerative diseases. Our previous studies demonstrate that, by activating innate immune receptors TLR4 (Toll-like receptor 4), binge-like ethanol exposure in adolescence causes neuroinflammation and neural damage. AIMS: To evaluate whether the intravenous administration of MSC-derived EVs is capable of reducing neuroinflammation, myelin and synaptic alterations, and the cognitive dysfunction induced by binge-like ethanol treatment in adolescent mice. MATERIALS & METHODS: MSC-derived EVs obtained from adipose tissue were administered in the tail vein (50 microg/dose, one weekly dose) to female WT adolescent mice treated intermittently with ethanol (3.0 g/kg) during two weeks. RESULTS: MSC-derived EVs from adipose tissue ameliorate ethanol-induced up-regulation of inflammatory genes (e.g., COX-2, iNOS, MIP-1α, NF-κB, CX3CL1, and MCP-1) in the prefrontal cortex of adolescent mice. Notably, MSC-derived EVs also restore the myelin and synaptic derangements, and the memory and learning impairments, induced by ethanol treatment. Using cortical astroglial cells in culture, our results further confirm that MSC-derived EVs decrease inflammatory genes in ethanol-treated astroglial cells. This, in turn, confirms in vivo findings. CONCLUSION: Taken together, these results provide the first evidence for the therapeutic potential of the MSC-derived EVs in the neuroimmune response and cognitive dysfunction induced by binge alcohol drinking in adolescence.