REPOST: **VIRTUAL SEMINAR** BioMOO Neuroscience Journal Club

Martin Leach leach at mbcrr.harvard.edu
Fri May 27 17:06:29 EST 1994


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* *                      B i o M O O         .-~ ~.  `. .'  .'   .~-.   * *
* *           (__)                          (_. o  o o  o   o   o  . \  * *
* *           (@*)      Neuroscience        (    o   o  _ o   o   o   | * *
* *    /-------\u'      Journal Club        (_ .o   o /'   o o  ______| * *
* *   / |     ||                             `\______(  o     /======/' * *
* *     ||----||      will be presenting              \_____/'=====/'   * *
* *     ^^    ^^          the paper                      |      |       * *
* *                                                      `\     |       * *
* *            66     Neurotoxicity of a     99                         * *
* *                 Prion Protein Fragment                              * *
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* *                           ( Nature 1993 Apr 8; 362 (6420): 543-6 )  * *
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* *           on Monday 6th June, ( 9 am EST,  2 pm GMT )               * *
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* * BioMOO is at bioinfo.weizmann.ac.il 8888                            * *
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Dear Bionetters,

Neville Percy (Nev in Biomoo) and I (Martin) are going to present the
following paper at the next BioMOO journal club.
A short article gives some background to prions (if you want some
background info) - Neville recommends....A 'unified theory' of prion
propagation. Nature 1991 Nov 7;354(6348):25-6

We are proposing for the next journal club to be on Monday 6th June (9AM
EST - 2PM GMT)

This may be subject to change - ie the computer system goes down - mega-lag
etc..Good luck reading the article
Nev and Martin

TI: Neurotoxicity of a prion protein fragment.
AU: Forloni-G; Angeretti-N; Chiesa-R; Monzani-E; Salmona-M; Bugiani-O;
Tagliavin
i-F
SO: Nature. 1993 Apr 8; 362(6420): 543-6
PY: 1993
LA: ENGLISH
AB: The cellular prion protein (PrPC) is a sialoglycoprotein of M(r) 33-35K
that is expressed predominantly in neurons. In transmissible and genetic
neurodegene rative disorders such as scrapie of sheep, spongiform
encephalopathy of cattle and Creutzfeldt-Jakob or
Gerstmann-Straussler-Scheinker diseases of humans, PrPC is converted into
an altered form (termed PrPSc) which is distinguishable from its normal
homologue by its relative resistance to protease digestion. PrPSc
accumulates in the central nervous system of affected individuals, and its
protease-resistant core aggregates extracellularly into amyloid fibrils.
The process is accompanied by nerve cell loss, whose pathogenesis and
molecular basis are not understood. We report here that neuronal death
results from chronic exposure of primary rat hippocampal cultures to
micromolar concentrations of a peptide corresponding to residues 106-126 of
the amino-acid sequence deduced from human PrP complementary DNA. DNA
fragmentation of degenerating neurons indicates that cell death occurred by
apoptosis. The PrP peptide 106-126 has a high intrinsic ability to
polymerize into amyloid-like fibrils in vitro. These findings indicate that
c erebral accumulation of PrPSc and its degradation products may play a
role in the nerve cell degeneration that occurs in related encephalopathies
AN: 93218742


If you do not know how to connect to BioMOO or are just interested in this
virtual scientific community please refer to the latest issue of Science
which talks about BioMOO and gives instructions how to get there. The
Science article is:

Science - 13th May 1994, Vol. 263, pages 900-901


Martin Leach and Neville Percy
(co-organisers of this journal club)

emails: leach at mbcrr.harvard.edu or spbcnsp at ucl.ac.uk (respectively)



If you have any problems please feel free to contact either of us.




-- 

.....          Martin Leach                Email:leach at mbcrr.harvard.edu 
   _|____      Dept. of Pharmacology       Phone: (617) 638-5323        
   / o  /      Boston Univ. School of Med. Fax:   (617) 638-4329         
 _/  |-/__==/  80 E. Concord St. (L603)
(BULLDOZER) \_ Boston MA 02118            "Not the old underpants on your
               USA                           head.....WIBBLE" -BLACKADDER 
p.s. try BioMOO (virtual biology on the internet - telnet
bioinfo.weizmann.ac.il 8888)
 



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