Abstract
Heparan sulfate (HS) regulates processing of the amyloid precursor protein by the Alzheimer's beta-secretase (BACE-1). An HS analogue, porcine intestinal mucosal heparin, was systematically modified at the principal positions of O-sulfation and N-sulfation/acetylation and tested for BACE-1 inhibitory and anti factor Xa activities. The derivative with the highest anti-BACE-1 to anti-Xa activity ratio contained N-acetyl and 2-O- and 6-O-sulfates and also exhibited attenuated activities against cathepsin-D and renin, two other structurally related aspartyl proteases.
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