26 research outputs found

    Analysis of Thyroid Response Element Activity during Retinal Development

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    Thyroid hormone (TH) signaling components are expressed during retinal development in dynamic spatial and temporal patterns. To probe the competence of retinal cells to mount a transcriptional response to TH, reporters that included thyroid response elements (TREs) were introduced into developing retinal tissue. The TREs were placed upstream of a minimal TATA-box and two reporter genes, green fluorescent protein (GFP) and human placental alkaline phosphatase (PLAP). Six of the seven tested TREs were first tested in vitro where they were shown to drive TH-dependent expression. However, when introduced into the developing retina, the TREs reported in different cell types in both a TH-dependent and TH-independent manner, as well as revealed specific spatial patterns in their expression. The role of the known thyroid receptors (TR), TRα and TRβ, was probed using shRNAs, which were co-electroporated into the retina with the TREs. Some TREs were positively activated by TR+TH in the developing outer nuclear layer (ONL), where photoreceptors reside, as well as in the outer neuroblastic layer (ONBL) where cycling progenitor cells are located. Other TREs were actively repressed by TR+TH in cells of the ONBL. These data demonstrate that non-TRs can activate some TREs in a spatially regulated manner, whereas other TREs respond only to the known TRs, which also read out activity in a spatially regulated manner. The transcriptional response to even simple TREs provides a starting point for understanding the regulation of genes by TH, and highlights the complexity of transcriptional regulation within developing tissue

    A Survey of Educators Serving Students With Emotional and Behavioral Disorders During the Covid-19 Pandemic

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    In this descriptive study, we analyzed survey data regarding communication, instruction, and assessment strategies school personnel in K-12 settings reported using during the COVID-19 pandemic for students with emotional and behavioral disorders (EBD). Results indicate, whether instructional continuity was mandated or not, support personnel serving students with EBD reported using a variety of communication, instruction, and assessment strategies. Several strategies special educators reported using were significantly different than those provided by related service providers (e.g., school psychologist, counselor) during school site closures. Implications for future planning, policy, and research are discussed
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