167 research outputs found

    The Future of Law Libraries

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    Law libraries are filed with the rules that govern our society, thoughtful scholars, conscientious lawyers, some hard working students, and some procrastinating students. In the past, this required libraries to collect hardbound volumes and loose leafs. Today, the collection is beginning to give way to research platforms filed with those same, or similar, materials and then some; much of the primary legal documentation is even freely available on the web. While the physical footprint of the library may be smaller as a result of this transition, the amount of legal information that researchers have access to has grown exponentially. We now have more sophisticated tools for manipulating this ocean of digital information, and the services offered by law librarians are evolving along with those tools. This article will review current trends in law libraries

    Prospectus, September 14, 1994

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    https://spark.parkland.edu/prospectus_1994/1012/thumbnail.jp

    Prospectus, January 18, 1995

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    https://spark.parkland.edu/prospectus_1995/1000/thumbnail.jp

    Prospectus, November 16, 1994

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    https://spark.parkland.edu/prospectus_1994/1021/thumbnail.jp

    Cyclin-Dependent Kinase 5 (CDK5)-Mediated Phosphorylation of Upstream Stimulatory Factor 2 (USF2) Contributes to Carcinogenesis

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    The transcription factor USF2 is supposed to have an important role in tumor development. However, the regulatory mechanisms contributing to the function of USF2 are largely unknown. Cyclin-dependent kinase 5 (CDK5) seems to be of importance since high levels of CDK5 were found in different cancers associated with high USF2 expression. Here, we identified USF2 as a phosphorylation target of CDK5. USF2 is phosphorylated by CDK5 at two serine residues, serine 155 and serine 222. Further, phosphorylation of USF2 at these residues was shown to stabilize the protein and to regulate cellular growth and migration. Altogether, these results delineate the importance of the CDK5-USF2 interplay in cancer cells

    Prospectus, March 8, 1995

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    https://spark.parkland.edu/prospectus_1995/1007/thumbnail.jp

    Essential and distinct roles for cdc42 and rac1 in the regulation of Schwann cell biology during peripheral nervous system development

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    During peripheral nervous system (PNS) myelination, Schwann cells must interpret extracellular cues to sense their environment and regulate their intrinsic developmental program accordingly. The pathways and mechanisms involved in this process are only partially understood. We use tissue-specific conditional gene targeting to show that members of the Rho GTPases, cdc42 and rac1, have different and essential roles in axon sorting by Schwann cells. Our results indicate that although cdc42 is required for normal Schwann cell proliferation, rac1 regulates Schwann cell process extension and stabilization, allowing efficient radial sorting of axon bundles

    Profilin 1 is required for peripheral nervous system myelination

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    Myelination allows rapid saltatory propagation of action potentials along the axon and is an essential prerequisite for the normal functioning of the nervous system. During peripheral nervous system (PNS) development, myelin-forming Schwann cells (SCs) generate radial lamellipodia to sort and ensheath axons. This process requires controlled cytoskeletal remodeling, and we show that SC lamellipodia formation depends on the function of profilin 1 (Pfn1), an actinbinding protein involved in microfilament polymerization. Pfn1 is inhibited upon phosphorylation by ROCK, a downstream effector of the integrin linked kinase pathway. Thus, a dramatic reduction of radial lamellipodia formation is observed in SCs lacking integrinlinked kinase or treated with the Rho/ROCK activator lysophosphatidic acid. Knocking down Pfn1 expression by lentiviralmediated shRNA delivery impairs SC lamellipodia formation in vitro, suggesting a direct role for this protein in PNS myelination. Indeed,SC-specific gene ablation of Pfn1 in mice led to profound radial sorting and myelination defects, confirming a central role for this protein in PNS development. Our data identify Pfn1 as a key effector of the integrin linked kinase/Rho/ROCK pathway. This pathway, acting in parallel with integrin β1/LCK/Rac1 and their effectors critically regulates SC lamellipodia formation, radial sorting and myelination during peripheral nervous system maturation
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