Publications by authors named "Steven Schreiber"

Our initiation of a reverse-integration practice model revealed numerous advantages and rewards, as well as many challenges, for which we found solutions.

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Disseminated microinfarctions are uncommonly encountered in clinical practice. Here we describe a patient with long-standing cerebral microbleeds who developed acute cognitive decline in the setting of acute hypotension. Magnetic resonance imaging showed acute disseminated microinfarctions, with no change in microbleeds.

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Background: The recent growth in telehealth has been facilitated by the need to deliver healthcare to patients living in remote or rural areas. In contrast, the role of telehealth in more urban settings is less clear. A teleneurology program was established in 2011 at the Tibor Rubin VA Medical Center (TRVAMC) in Long Beach, California.

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Nucleophosmin (NPM) is a multifunctional nucleolar protein that has been linked with nucleolar stress. In non-neuronal cell lines, NPM may enhance or inhibit the activity of tumor suppressor p53, a major apoptotic protein. The relationship between NPM and p53 in the central nervous system (CNS) remains unknown.

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Redox factor-1 (Ref-1), also known as HAP1, APE or APEX, is a multifunctional protein that regulates gene transcription as well as the response to oxidative stress. By interacting with transcription factors such as AP-1, NF-kappaB and p53, and directly participating in the cleavage of apurininic/apyrimidinic DNA lesions, Ref-1 plays crucial roles in both cell death signaling pathways and DNA repair, respectively. Oxidative stress induced by aggregated beta-amyloid (Abeta) peptide, altered DNA repair and transcriptional activation of cell death pathways have been implicated in the pathophysiology of Alzheimer's disease (AD).

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Alzheimer's disease (AD) is pathologically characterized by accumulation of beta-amyloid (Abeta) protein deposits and/or neurofibrillary tangles in association with progressive cognitive deficits. Although numerous studies have demonstrated a relationship between brain pathology and AD progression, the Alzheimer's pathological hallmarks have not been found in the AD retina. A recent report showed Abeta plaques in the retinas of APPswe/PS1DeltaE9 transgenic mice.

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Memory loss is the signature feature of Alzheimer's disease, and therapies that prevent or delay its onset are urgently needed. Effective preventive strategies likely offer the greatest and most widespread benefits. Histone deacetylase (HDAC) inhibitors increase histone acetylation and enhance memory and synaptic plasticity.

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We evaluated the expression of DNA repair proteins, redox factor-1 (Ref-1) and X-ray repair cross-complementing protein 1 (XRCC1), relevant to neurodegeneration following kainic acid-induced seizures in rats. Neurons with oxidative DNA damage exhibited increased expression and colocalization of Ref-1 and XRCC1. Upregulation of DNA repair proteins was also associated with p53 induction and TUNEL.

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Activation of the p53-stress response pathway has been implicated in excitotoxic neuronal cell death. Recent studies have demonstrated an age-dependent induction of both p53 mRNA and protein in the rat brain following lithium-pilocarpine-mediated status epilepticus (LPSE). We investigated whether other proteins that have been shown to participate in the p53 cascade are induced by LPSE.

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Activation of the tumor suppressor gene, p53, has been strongly implicated in selective neuronal cell death. This study investigated p53 expression in the immature and adult rat brain following status epilepticus induced by the administration of lithium-pilocarpine (LPSE). Both p53 mRNA and protein were examined in relation to neuronal degeneration using in situ hybridization and immunohistochemistry, respectively.

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