[Impact of COVID-19 pandemic confinement on the behavior of children and adolescents with autism spectrum disorder]. / Impacto del confinamiento en pandemia COVID-19 en la conducta de niños, niñas y adolescentes con trastorno del espectro autista.

Coronavirus disease (COVID-19) and confinement have affected access to the health system and have impacted people's mental health, particularly families of children with autism spectrum di sorder (ASD). OBJECTIVE: To investigate the perceptions of parents of children with ASD regarding benefits, positive changes, and difficulties in behavioral management at home during the first con finement due to COVID-19 in Chile. SUBJECTS AND METHODS: We performed an exploratory cross sectional qualitative study including 118 parents of individuals with ASD aged between 2 and 15 years. An online questionnaire, prepared by a multidisciplinary committee of national experts using Delphi methodology was applied, which contains four open-ended questions related to children's behavior (difficulties, improvements, benefits, and professional support required) during the pan demic. RESULTS: Parents perceived that confinement increased emotional stress for adults and chil dren, which could exacerbate behavioral problems. The interviewees perceived improvements in child social-affective, individual autonomy, and communication skills. The family and resilience aspects, such as time-sharing that emerged during the pandemic to support children's needs, were appreciated. Parents also reported the need for professional support in behavioral and emotional management during confinement. CONCLUSION: Caregivers value the integration of the family into therapies during confinement. It is necessary to complement these results with additional studies exploring different life contexts of families with children with ASD in Chile and the impacts of long term confinement.

Regulatory T cell-like responses in deer mice persistently infected with Sin Nombre virus.

Hantavirus cardiopulmonary syndrome is a zoonotic illness associated with a systemic inflammatory immune response, capillary leak, noncardiogenic pulmonary edema, and shock in humans. Cytokines, including TNF, IFN-gamma, and lymphotoxin, are thought to contribute to its pathogenesis. In contrast, infected rodent reservoirs of hantaviruses experience few or no pathologic changes and the host rodent can remain persistently infected for life. Generally, it is unknown why such dichotomous immune responses occur between humans and reservoir hosts. Thus, we examined CD4(+) T cell responses from one such reservoir, the deer mouse (Peromyscus maniculatus), infected with Sin Nombre virus. Proliferation responses to viral nucleocapsid antigen were relatively weak in T cells isolated from deer mice, regardless of acute or persistent infection. The T cells from acutely infected deer mice synthesized a broad spectrum of cytokines, including IFN-gamma, IL-4, IL-5, and TGF-beta(1), but not TNF, lymphotoxin, or IL-17. However, in T cells from persistently infected deer mice, only TGF-beta(1) was expressed by all lines, whereas some expressed reduced levels of IFN-gamma or IL-5. The Forkhead box P3 transcription factor, a marker of some regulatory T cells, was expressed by most of these cells. Collectively, these data suggest that TGF-beta(1)-expressing regulatory T cells may play an important role in limiting immunopathology in the natural reservoir host, but this response may interfere with viral clearance. Such a response may have arisen as a mutually beneficial coadaptive evolutionary event between hantaviruses and their rodent reservoirs, so as to limit disease while also allowing the virus to persist.