Elizabeth F. Brigham

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Several neurological diseases, including Parkinson disease and dementia with Lewy bodies, are characterized by the accumulation of alpha-synuclein phosphorylated at Ser-129 (p-Ser-129). The kinase or kinases responsible for this phosphorylation have been the subject of intense investigation. Here we submit evidence that polo-like kinase 2 (PLK2, also known(More)
To gain a molecular understanding of neuronal responses to amyloid-beta peptide (Abeta), we have analyzed the effects of Abeta treatment on neuronal gene expression in vitro by quantitative reverse transcription-PCR and in situ hybridization. Treatment of cultured rat cortical neurons with Abeta1-40 results in a widespread apoptotic neuronal death.(More)
The aspartyl protease beta-site amyloid precursor protein cleaving enzyme 1 (BACE1) initiates processing of amyloid precursor protein (APP) into amyloid beta (Abeta) peptide, the major component of Alzheimer disease (AD) plaques. To determine the role that BACE1 plays in the development of Abeta-driven AD-like pathology, we have crossed PDAPP mice, a(More)
Triple-transgenic mice (3xTgAD) overexpressing Swedish-mutated β-amyloid precursor protein (βAPP(swe)), P310L-Tau (Tau(P301L)), and physiological levels of M146V-presenilin-1 (PS1(M146V)) display extracellular amyloid-β peptides (Aβ) deposits and Tau tangles. More disputed is the observation that these mice accumulate intraneuronal Aβ that has been linked(More)
Genetic evidence links mutations in the LRRK2 gene with an increased risk of Parkinson's disease, for which no neuroprotective or neurorestorative therapies currently exist. While the role of LRRK2 in normal cellular function has yet to be fully described, evidence suggests involvement with immune and kidney functions. A comparative study of LRRK2-deficient(More)
INTRODUCTION Inhibition of gamma-secretase presents a direct target for lowering Aβ production in the brain as a therapy for Alzheimer's disease (AD). However, gamma-secretase is known to process multiple substrates in addition to amyloid precursor protein (APP), most notably Notch, which has limited clinical development of inhibitors targeting this enzyme.(More)
or casein kinase 2 was incubated with 27mM Hepes, pH 7.5, 1mM MgCl2, 10µCi/nmole 32 P-γ-ATP (Perkin Elmer), 1µM casein (Sigma), 40mM nitrophenylphosphate (Sigma), and 100µM orthovanadate (Sigma), at 30ºC for 2 hours. Reactions were stopped with SDS-PAGE sample buffer, and loaded onto 10-20% Tricine gels (Invitrogen). After separating the proteins, the gels(More)
Neurogenesis impairment starting from early developmental stages is a key determinant of intellectual disability in Down syndrome (DS). Previous evidence provided a causal relationship between neurogenesis impairment and malfunctioning of the mitogenic Sonic Hedgehog (Shh) pathway. In particular, excessive levels of AICD (amyloid precursor protein(More)
The loss of synapses is a strong histological correlate of the cognitive decline in Alzheimer's disease (AD). Amyloid β-peptide (Aβ), a cleavage product of the amyloid precursor protein (APP), exerts detrimental effects on synapses, a process thought to be causally related to the cognitive deficits in AD. Here, we used in vivo two-photon microscopy to(More)
Background Triple-transgenic mice (3xTgAD) overexpressing Swed-ish-mutated b-amyloid-precursor-protein (APP swe), P310L-Tau (Tau P301L) and physiological levels of M146V-presenilin-1 (PS1 M146V) display extracellular amyloid-beta peptides (Abeta) deposits and Tau tangles at late ages. These mice also show an early, age-dependent and hippo-campus specific(More)
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