APOLIPOPROTEINS E3 AND E4 INDUCE, AND TRANSTHYRETIN PREVENTS ACCUMULATION OF THE ALZHEIMERS BETA-AMYLOID PEPTIDE IN CULTURED VASCULAR SMOOTH-MUSCLE CELLS
B. Mazurkolecka et al., APOLIPOPROTEINS E3 AND E4 INDUCE, AND TRANSTHYRETIN PREVENTS ACCUMULATION OF THE ALZHEIMERS BETA-AMYLOID PEPTIDE IN CULTURED VASCULAR SMOOTH-MUSCLE CELLS, Brain research, 698(1-2), 1995, pp. 217-222
Cultured brain vascular smooth muscle cells (SMCs) accumulate beta-pep
tide in intracytoplasmic granules [9,10,33]. We show here that apoE3 a
nd E4 induces the intracytoplasmic beta-peptide accumulation in cultur
ed human and canine SMCs. The induction is dose-dependent and the accu
mulated granules also contain apoE and some were thioflavine S-positiv
e. The deposits induced with apoE3 were more abundant though less stab
le than with apoE4. Transthyretin at physiological concentrations bloc
ked the effects of apoE3/E4. Thus, accumulation of beta-peptide appear
s to be regulated by beta-peptide carrier proteins.