199 research outputs found

    In Memoriam Carl Kristian Wiens (1964-2012)

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    Community engagement: A central feature of NOSM’s socially accountable distributed medical education

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    Background: Northern Ontario School of Medicine (NOSM) serves as the Faculty of Medicine of Lakehead and Laurentian Universities, and views the entire geography of Northern Ontario as its campus. This paper explores how community engagement contributes to achieving social accountability in over 90 sites through NOSM’s distinctive model, Distributed Community Engaged Learning (DCEL).Methods: Studies involving qualitative and quantitative methods contribute to this paper, which draws on administrative data from NOSM and external sources, as well as surveys and interviews of students, graduates and other informants including the joint NOSM-CRaNHR (Centre for Rural and Northern Health Research) tracking and impact studies.Results: Community engagement contributes throughout the lifecycle stages of preadmission, admission, and undergraduate medical education. High school students from 70 Northern Ontario communities participate in NOSM’s week-long Health Sciences Summer Camps. The MD admissions process involves approximately 128 volunteers assessing written applications and over 100 volunteer interviewers. Thirty-six Indigenous communities host first year students and third-year students learn their core clinical medicine in 15 communities, throughout Northern Ontario. In general, learners and communities report net benefits from participation in NOSM programs.Conclusion: Community engagement makes a key contribution to the success of NOSM’s socially accountable distributed medical education

    An RNA-sequencing transcriptome of the rodent Schwann cell response to peripheral nerve injury.

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    BACKGROUND The important contribution of glia to mechanisms of injury and repair of the nervous system is increasingly recognized. In stark contrast to the central nervous system (CNS), the peripheral nervous system (PNS) has a remarkable capacity for regeneration after injury. Schwann cells are recognized as key contributors to PNS regeneration, but the molecular underpinnings of the Schwann cell response to injury and how they interact with the inflammatory response remain incompletely understood. METHODS We completed bulk RNA-sequencing of Schwann cells purified acutely using immunopanning from the naïve and injured rodent sciatic nerve at 3, 5, and 7 days post-injury. We used qRT-PCR and in situ hybridization to assess cell purity and probe dataset integrity. Finally, we used bioinformatic analysis to probe Schwann cell-specific injury-induced modulation of cellular pathways. RESULTS Our data confirm Schwann cell purity and validate RNAseq dataset integrity. Bioinformatic analysis identifies discrete modules of genes that follow distinct patterns of regulation in the 1st days after injury and their corresponding molecular pathways. These findings enable improved differentiation of myeloid and glial components of neuroinflammation after peripheral nerve injury and highlight novel molecular aspects of the Schwann cell injury response such as acute downregulation of the AGE/RAGE pathway and of secreted molecules Sparcl1 and Sema5a. CONCLUSIONS We provide a helpful resource for further deciphering the Schwann cell injury response and a depth of transcriptional data that can complement the findings of recent single cell sequencing approaches. As more data become available on the response of CNS glia to injury, we anticipate that this dataset will provide a valuable platform for understanding key differences in the PNS and CNS glial responses to injury and for designing approaches to ameliorate CNS regeneration

    The Very Young Type Ia Supernova 2012cg: Discovery and Early-Time Follow-Up Observations

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    On 2012 May 17.2 UT, only 1.5 +/- 0.2 d after explosion, we discovered SN 2012cg, a Type Ia supernova (SN Ia) in NGC 4424 (d ~ 15 Mpc). As a result of the newly modified strategy employed by the Lick Observatory SN Search, a sequence of filtered images was obtained starting 161 s after discovery. Utilizing recent models describing the interaction of SN ejecta with a companion star, we rule out a ~1 M_Sun companion for half of all viewing angles and a red-giant companion for nearly all orientations. SN 2012cg reached a B-band maximum of 12.09 +/- 0.02 mag on 2012 June 2.0 and took ~17.3 d from explosion to reach this, typical for SNe Ia. Our pre-maximum brightness photometry shows a narrower-than-average B-band light curve for SN 2012cg, though slightly overluminous at maximum brightness and with normal color evolution (including some of the earliest SN Ia filtered photometry ever obtained). Spectral fits to SN 2012cg reveal ions typically found in SNe Ia at early times, with expansion velocities >14,000 km/s at 2.5 d past explosion. Absorption from C II is detected early, as well as high-velocity components of both Si II 6355 Ang. and Ca II. Our last spectrum (13.5 d past explosion) resembles that of the somewhat peculiar SN Ia 1999aa. This suggests that SN 2012cg will have a slower-than-average declining light curve, which may be surprising given the faster-than-average rising light curve.Comment: re-submitted to ApJL, 4 figures, 1 tabl

    Development and validation of a printed information brochure for families of chronically critically ill patients*

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    Families and other surrogate decision-makers for chronically critically ill patients often lack information about patient prognosis or options for care. This study describes an approach to develop and validate a printed information brochure about chronic critical illness aimed at improving comprehension of the disease process and outcomes for patients’ families and other surrogate decision-makers
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