Publications by authors named "Jennifer J Chen"

Background: Depression is one of the most common mental health concerns among adolescents and young adults. Childhood maltreatment is a particularly potent risk factor for the subsequent development of depressive symptoms. Meanwhile, social support has been identified as a robust protective factor against depressive symptoms.

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RNA polymerase II transcription elongation directs an intricate pattern of histone modifications. This pattern includes a regulatory cascade initiated by the elongation factor Rtf1, leading to monoubiquitylation of histone H2B, and subsequent methylation of histone H3 on lysine 4. Previous studies have defined the molecular basis for these regulatory relationships, but it remains unclear how they regulate gene expression.

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Heterochromatin is a condensed chromatin structure that represses transcription of repetitive DNA elements and developmental genes, and is required for genome stability. Paradoxically, transcription of heterochromatic sequences is required for establishment of heterochromatin in diverse eukaryotic species. As such, components of the transcriptional machinery can play important roles in establishing heterochromatin.

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Histone ubiquitylation is a critical part of both active and repressed transcriptional states, and lies at the heart of DNA damage repair signaling. The histone residues targeted for ubiquitylation are often highly conserved through evolution, and extensive functional studies of the enzymes that catalyze the ubiquitylation and de-ubiquitylation of histones have revealed key roles linked to cell growth and division, development, and disease in model systems ranging from yeast to human cells. Nonetheless, the downstream consequences of these modifications have only recently begun to be appreciated on a molecular level.

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During COVID-19, many schools in the United States restrict parent visits and parent-teacher face-to-face meetings. Consequently, teachers and parents rely on digital technologies to communicate and build partnerships. Yet, little is known about their perceived experiences with digital communication.

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Building on aspects of Vygotsky's sociocultural theory centering around social interaction and adult scaffolding as essential to children's learning, this study investigated the most prominently used strategies by eight teachers to scaffold social and emotional learning (SEL) in preschool children (ages 3-4) in the context of remote instruction during the 2021-2022 school year amidst COVID-19. These teachers (seven females and one male) came from two urban preschools funded by their local Board of Education in the state of New Jersey in the United States. These teachers (ages 28-44 years,  = 32 years) varied in teaching experience from five to 29 years ( = 13 years).

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Building on theoretical and empirical insights and applying the thriving theory as the conceptual framework, the authors developed two new teacher-specific scales, namely the Teacher Stress Scale (TSS) and the Teacher Thriving Scale (TTS). The goal of this investigation was to evaluate the psychometric properties of these two scales. Data were collected through an online questionnaire administered to a national sample of 122 participating early childhood teachers (ages 22-72 years, = 41.

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Skeletal muscle myoblasts (iMyoblasts) were generated from human induced pluripotent stem cells (iPSCs) using an efficient and reliable transgene-free induction and stem cell selection protocol. Immunofluorescence, flow cytometry, qPCR, digital RNA expression profiling, and scRNA-Seq studies identify iMyoblasts as a skeletal myogenic lineage with a fetal-like transcriptome signature, distinct from adult muscle biopsy myoblasts (bMyoblasts) and iPSC-induced muscle progenitors. iMyoblasts can be stably propagated for >12 passages or 30 population doublings while retaining their dual commitment for myotube differentiation and regeneration of reserve cells.

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"Learning loss" has become the new buzzword in education during the COVID-19 era. Learning loss may be real in certain academic subjects (e.g.

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The activity of striatal medium-spiny projection neurons is regulated by D1 and D2 dopamine receptors. The D1 receptor (D1R) is a Gα-coupled GPCR which activates a cAMP/PKA/DARPP-32 signalling cascade that increases excitability and facilitates plasticity, partly through the regulation of transcription. Upon activation via D1R, PKA can translocate to the nucleus to regulate transcription through the phosphorylation of various targets.

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Rtf1 is a conserved RNA polymerase II (RNAPII) elongation factor that promotes cotranscriptional histone modification, RNAPII transcript elongation, and mRNA processing. Rtf1 function requires the phosphorylation of Spt5, an essential RNAPII processivity factor. Spt5 is phosphorylated within its C-terminal domain (CTD) by cyclin-dependent kinase 9 (Cdk9), the catalytic component of positive transcription elongation factor b (P-TEFb).

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Article Synopsis
  • H2B monoubiquitylation (H2Bub1) is crucial for RNA polymerase II transcription elongation and is implicated in DNA replication and repair, with its loss linked to cell cycle progression defects.
  • H2Bub1 regulates replication-dependent histone genes in fission yeast by suppressing antisense transcription of a gene coding for a transcription factor necessary for histone gene activation and centromeric chromatin assembly.
  • Mutants lacking H2Bub1 or the E3 ubiquitin ligase Brl2 show increased antisense transcripts and decreased protein levels, indicating that improper transcription elongation due to Cdk9 activity contributes to chromosome segregation issues.
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Novel pathogens have the potential to become critical issues of national security, public health and economic welfare. As demonstrated by the response to Severe Acute Respiratory Syndrome (SARS) and influenza, genomic sequencing has become an important method for diagnosing agents of infectious disease. Despite the value of genomic sequences in characterizing novel pathogens, raw data on their own do not provide the information needed by public health officials and researchers.

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Objective: With implementation of Medicare Part D, concerns were raised that patients with severe mental illness who were dually eligible for both Medicaid and Medicare benefits would be at clinical risk. In addition to concerns about medication access and continuity, there were concerns about administrative burden for physicians and their staffs. This study aimed to quantify the amount of administrative burden for psychiatrists and their staff related to Medicare Part D prescription drug plan administration in a national sample of dually eligible psychiatric patients and to identify factors associated with increased burden.

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The author tested a model hypothesizing that students' self-perceived academic support (from parents, teachers, and peers) is related to their achievement directly and indirectly through their own perceived academic engagement. The participants were 270 adolescents (M age = 15.41 years, range = 14-20 years) from 3 grade levels (Forms 3-5, equivalent to Grades 9-11 in the United States) in a Hong Kong secondary school.

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