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Society for Neuroscience Annual Meeting, Miami: Tau Update

CONFERENCE COVERAGE 1999-11-29 Conference Coverage Toward a neurofibrillary degeneration animal model, Michael Vitek's group (317.1) reported on their tau knockouts. Homozygous mice demonstrated the lack of tau at both mRNA and protein levels. Embryos (-/-) were smaller than wt ...

Fetal Cell Transplants Do Work in Parkinson's

RESEARCH NEWS 1999-11-22 Research News Ten years after a fetal cell transplant, a Parkinson's patient's graft is still delivering dopamine to postsynaptic cells, according to a study appearing in the December issue of Nature Neuroscience. This unprecedented in vivo ...

Presenilin-1 Interferes with Protein Folding

RESEARCH NEWS 1999-11-03 Research News A report in the current Nature Cell Biology describes a mechanism by which presenilin-1 (PS-1) mutations can interfere with protein folding. Kazunori Imaizumi of Osaka University and colleagues suggest that this process underlies ...

Society for Neuroscience Annual Meeting: α-Synuclein: A Review

CONFERENCE COVERAGE 1999-11-03 Conference Coverage Hashimoto, Masliah and colleagues (27.14) reported that cytochrome C stimulates α-synuclein aggregration in vitro and that cytochrome C can be observed in Lewy bodies, in postmortem brain tissue. Whether cytochrome C actually plays a ...

Society for Neuroscience Annual Meeting: Presenilins: An Overview

CONFERENCE COVERAGE 1999-11-01 Conference Coverage Research on presenilins presented at this year's meeting centered around two major questions: 1) What is the role of presenilins in Aβ production and APP processing, and 2) what are the other biological actions of presenilins? A ...

Society for Neuroscience Annual Meeting: Be Wise—Immunize!

CONFERENCE COVERAGE 1999-10-26 Conference Coverage In the relatively short time allotted, Dale Schenk (519.5) managed to describe most of the data from his group’s recent Nature paper (Nature 1999;400:173-177), and a little more. Schenk demonstrated that Aβ immunization of young (six ...

Society for Neuroscience Annual Meeting: A Sniff of Aβ

CONFERENCE COVERAGE 1999-10-26 Conference Coverage Chronic mucosal administration of certain proteins is known to decrease organ-specific autoimmune processes in several autoimmune models, including those affecting the CNS. In AD, local inflammatory responses frequently occur in the ...

Soc for Neuroscience Annual Meeting: Lipoproteins Reduce Clearance of Aβ

CONFERENCE COVERAGE 1999-10-25 Conference Coverage Using exquisite human primary cortical cultures containing neurons, astrocytes, and microglia, Nadeau (319.1) demonstrated that addition of VLDLs or HDLs increased media levels of both Aβ40 and Aβ42. Moreover, addition of ApoE3, Apo4 ...

Soc for Neuroscience Ann Mtg: Reduced Cholesterol Levels Inhibit Aβ

CONFERENCE COVERAGE 1999-10-25 Conference Coverage Using primary hippocampal neurons transfected with APP by means of the Semliki-forest-virus expression system Christine Bergmann (319.2) demonstrated that lovastatin (which inhibits de novo cholesterol synthesis) and methyl-b ...

Society for Neuroscience Annual Meeting: Intraneuronal Aβ

CONFERENCE COVERAGE 1999-10-25 Conference Coverage Until very recently, Aβ accumulation and aggregation were thought to be exclusively extracellular phenomena. However, a number of abstracts presented at this meeting (see 120.10 and 720.10) suggest that this notion must be revisited. ...

Society for Neuroscience Annual Meeting: DIGs—a Site of Aβ?

CONFERENCE COVERAGE 1999-10-25 Conference Coverage Kawarabayashi (319.10) presented compelling data for a time-dependent accumulation of Aβ in the detergent-insoluble glycolipid enriched membrane domains (DIGs) of Tg2576 mouse brain. He also showed that Aβ accumulated in DIGs from ...

Society for Neuroscience Annual Meeting: The TGN—Where It's Happening?

CONFERENCE COVERAGE 1999-10-25 Conference Coverage In an exhaustive study, Iwata (240.1) presented evidence that the trans Golgi network was the major site of Aβ42 production in both neural and non-neural cells. Cos-1 and N2a cells were transfected with C100 bearing retention signals ...

Society for Neuroscience Annual Meeting: TACE, TAPI, and ADAM10

CONFERENCE COVERAGE 1999-10-25 Conference Coverage The mechanisms of regulated α-secretase cleavage were thoroughly examined in two excellent companion posters from Virginia Lee’s lab (240.2, 240.3). The authors demonstrated that TNFalpha converting enzyme (TACE) knockout mice show ...

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