K. Kadoyama et al., Cyclooxygenase-2 stimulates production of amyloid beta-peptide in neuroblastoma x glioma hybrid NG108-15 cells, BIOC BIOP R, 281(2), 2001, pp. 483-490
Citations number
42
Categorie Soggetti
Biochemistry & Biophysics
Journal title
BIOCHEMICAL AND BIOPHYSICAL RESEARCH COMMUNICATIONS
Cyclooxygenase (COX) synthesizes bioactive prostaglandins from arachidonic
acid, and there are COX-1 and COX-2 isoforms with distinct pathophysiologic
al functions, Recent studies demonstrated that COX-2 expression was up-regu
lated in the brain of patients with Alzheimer's disease. We established mou
se neuroblastoma x rat glioma hybrid NG108-15 cells stably expressing human
COX-2, The COX-2-expressing cells showed 3- to Q-fold increases in both CO
X activity and prostaglandin E-2 production. The mRNA level of amyloid prec
ursor protein (APP) was elevated by approximately 2-fold in the COX-2-expre
ssing cells compared with mock-transfected cells, Amyloid beta -peptide and
a secreted form of APP, both derived from APP by proteolysis was also incr
eased. Interestingly, neurite outgrowth was stimulated in the COX-2-express
ing cells with concomitant reduction of the cell proliferation rate, A sele
ctive COX-2 inhibitor (JTE-522) and a nonselective COX inhibitor (indometha
cin) suppressed production of amyloid beta -peptide and a secreted form of
APP by inhibition of APP mRNA level, suggesting that COX-2 plays important
roles in the neurodegenerative processes of Alzheimer's disease. (C) 2001 A
cademic Press.