home
***
CD-ROM
|
disk
|
FTP
|
other
***
search
/
Shareware Overload Trio 2
/
Shareware Overload Trio Volume 2 (Chestnut CD-ROM).ISO
/
dir26
/
med9408a.zip
/
M9480075.TXT
< prev
next >
Wrap
Text File
|
1994-08-09
|
2KB
|
40 lines
Document 0075
DOCN M9480075
TI Alkaloidal glycosidase inhibitors (AGIs) as the cause of sporadic
scrapie, and the potential treatment of both transmissible spongiform
encephalopathies (TSEs) and human immunodeficiency virus (HIV)
infection.
DT 9410
AU Dealler S; York District Hospital Microbiology Department, UK.
SO Med Hypotheses. 1994 Feb;42(2):69-75. Unique Identifier : AIDSLINE
MED/94293839
AB AGIs are produced by plants and microorgansims in the environment. They
are absorbed from the gut, distributed throughout the body and are
concentrated inside cells. AGIs alter the glycan chains of cellular
glycoproteins (CGP) during their formation so that the same CGP produced
by different clones of cells (and hence with different glycan chains)
becomes structurally the same. Prion protein (PrP), a CGP, is rendered
indestructable to cellular mechanisms (as PrPi) by the TSE infective
process; it is suggested that AGIs could both cause and prevent this by
altering the primary structure of PrP. HIV envelope protein, gp120,
carries glycan chains that are decided by the clone of the cells by
which it is produced. Each cellular clone would be expected to add a
specific group of glycan chains, making the gp120 antigenically
separate. As HIV infection progresses, infected clone numbers rise, the
antigenic diversity of gp120 may rise as would antibody production,
trying to keep pace. Antigenically stimulated CD4+ cells carrying HIV
genes, increase HIV production with gp120 antigenically different from
its stimulant. AGIs prevent the glycan diversity and may prevent the
extension of HIV infection.
DE Alkaloids/*PHARMACOLOGY Animal Antigenic Variation/DRUG EFFECTS
Creutzfeldt-Jakob Syndrome/ETIOLOGY Glycoside Hydrolases/*ANTAGONISTS &
INHIB Glycosylation Human HIV Envelope Protein
gp120/IMMUNOLOGY/METABOLISM HIV Infections/DRUG THERAPY
HIV-1/IMMUNOLOGY Models, Biological Prion Diseases/DRUG THERAPY
Prions/CHEMISTRY/METABOLISM Scrapie/*ETIOLOGY JOURNAL ARTICLE REVIEW
REVIEW, TUTORIAL
SOURCE: National Library of Medicine. NOTICE: This material may be
protected by Copyright Law (Title 17, U.S.Code).