3,587 research outputs found

    Home-Based Therapy for Young Children in Low-Income Families: A Student Training Program

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    The purpose of this project was to develop an internship training program that offered in-home therapy for young children with significant emotional and behavior problems. The children lived in single-parent, low-income homes in unsafe neighborhoods of a large, urban area. A year-long, training and supervision program was implemented with 10 second-year, graduate students enrolled in 5 different university programs that prepared mental health professionals. Students received specialized instruction in working with diverse families living in poverty and in an evidence-based treatment program. They initially observed veteran counselors implementing the treatment program in homes and gradually assumed responsibility for conducting sessions on their own. Students’ scores on a measure of counseling self-efficacy improved significantly from pre-to post-internship. Students reported high levels of satisfaction with the training program and significantly improved confidence levels in their counseling skills at the conclusion of their internship experience. The limitations of these preliminary outcomes for this pilot program are discussed along with the need for more research in this understudied area

    Proteolytic Cleavage of Apolipoprotein E in the Down Syndrome Brain

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    Down syndrome (DS) is one of the most common genetic causes of intellectual disability and is characterized by a number of behavioral as well as cognitive symptoms. Many of the neuropathological features of early-onset Alzheimer’s disease (AD) including senile plaques and neurofibrillary tangles (NFTs) are also present in people with DS as a result of triplication of the amyloid precursor gene on chromosome 21. Evidence suggests that harboring one or both apolipoprotein E4 (APOE4) alleles may increase the risk for AD due to the proteolytic cleavage of apoE4 and a subsequent loss of function. To investigate a role for the apoE proteolysis in vivo, we compared three autopsy groups; 7 DS with AD neuropathology cases over 40 years, 5 young DS cases without AD pathology under 40 years (YDS) and 5 age-matched control cases over 40 years by immunohistochemistry utilizing an antibody that detects the amino-terminal fragment of apoE. Application of this antibody, termed the amino-terminal apoE fragment antibody (nApoECF) revealed labeling of pyramidal neurons in the frontal cortex of YDS cases, whereas in the DS-AD group, labeling with nApoECF was prominent within NFTs. NFT labeling with nApoECF was significantly greater in the hippocampus versus the frontal cortex in the same DS-AD cases, suggesting a regional distribution of truncated apoE. Colocalization immunofluorescence experiments indicated that 52.5% and 53.2% of AT8- and PHF-1-positive NFTs, respectively, also contained nApoECF. Collectively, these data support a role for the proteolytic cleavage of apoE in DS and suggest that apoE fragmentation is closely associated with NFTs

    Profiling human breast epithelial cells using single cell RNA sequencing identifies cell diversity.

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    Breast cancer arises from breast epithelial cells that acquire genetic alterations leading to subsequent loss of tissue homeostasis. Several distinct epithelial subpopulations have been proposed, but complete understanding of the spectrum of heterogeneity and differentiation hierarchy in the human breast remains elusive. Here, we use single-cell mRNA sequencing (scRNAseq) to profile the transcriptomes of 25,790 primary human breast epithelial cells isolated from reduction mammoplasties of seven individuals. Unbiased clustering analysis reveals the existence of three distinct epithelial cell populations, one basal and two luminal cell types, which we identify as secretory L1- and hormone-responsive L2-type cells. Pseudotemporal reconstruction of differentiation trajectories produces one continuous lineage hierarchy that closely connects the basal lineage to the two differentiated luminal branches. Our comprehensive cell atlas provides insights into the cellular blueprint of the human breast epithelium and will form the foundation to understand how the system goes awry during breast cancer
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