Robert Scott Bitner

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Amyloid beta-peptide (Abeta)(1-42) oligomers have recently been discussed as intermediate toxic species in Alzheimer's disease (AD) pathology. Here we describe a new and highly stable Abeta(1-42) oligomer species which can easily be prepared in vitro and is present in the brains of patients with AD and Abeta(1-42)-overproducing transgenic mice.(More)
The histamine H3 receptor, first described in 1983 as a histamine autoreceptor and later shown to also function as a heteroreceptor that regulates the release of other neurotransmitters, has been the focus of research by numerous laboratories as it represents an attractive drug target for a number of indications including cognition. The purpose of this(More)
Acute pharmacological blockade of central histamine H3 receptors (H3Rs) enhances arousal/attention in rodents. However, there is little information available for other behavioral domains or for repeated administration using selective compounds. ABT-239 [4-(2-{2-[(2R)-2-methylpyrrolidinyl]ethyl}-benzofuran-5-yl)benzonitrile] exemplifies such a selective,(More)
Development of analgesic agents for the treatment of severe pain requires the identification of compounds that are devoid of opioid receptor liabilities. A potent (inhibition constant = 37 picomolar) neuronal nicotinic acetylcholine receptor (nAChR) ligand called ABT-594 was developed that has antinociceptive properties equal in efficacy to those of(More)
The alpha7 nicotinic acetylcholine receptor (nAChR) plays an important role in cognitive processes and may represent a drug target for treating cognitive deficits in neurodegenerative and psychiatric disorders. In the present study, we used a novel alpha7 nAChR-selective agonist, 2-methyl-5-(6-phenyl-pyridazin-3-yl)-octahydro-pyrrolo[3,4-c]pyrrole(More)
The alpha7 nicotinic acetylcholine receptor (nAChR) plays an important role in cognitive processes and has generated recent interest as a potential drug target for treating neurodegenerative disorders such as Alzheimer's disease (AD). The property of Ca(2+) permeation associated with alpha7 nAChR agonism may lead to Ca(2+)-dependent intracellular signaling(More)
Amyloid b-peptide (Ab)1)42 oligomers have recently been discussed as intermediate toxic species in Alzheimer’s disease (AD) pathology. Here we describe a new and highly stable Ab1)42 oligomer species which can easily be prepared in vitro and is present in the brains of patients with AD and Ab1)42-overproducing transgenic mice. Physicochemical(More)
Pharmacological blockade of central histamine H3 receptors (H3Rs) enhances cognition in rodents and offers promise for the clinical treatment of neurological disorders. However, many previously characterized H3R antagonists are either not selective for H3Rs or have potentially significant tolerability issues. Here, we present in vivo behavioral and(More)
We previously reported that alpha7 nicotinic acetylcholine receptor (nAChR) agonism produces efficacy in preclinical cognition models correlating with activation of cognitive and neuroprotective signaling pathways associated with Alzheimer's disease (AD) pathology. In the present studies, the selective and potent alpha7 nAChR agonist(More)
EFFORTS DURING THE PAST SEVERAL YEARS have enabled an enhanced level of understanding of urinary bladder physiology and pathophysiology, with continued exploitation of muscarinic receptors as drug targets, and the identification of novel molecular underpinnings of pathways such as C fiber afferents and the vanilloid TrpV1 receptors, the noncholinergic(More)