MODIFIED AMYLOID-BETA PROTEIN ENDING AT 42 OR 40 WITH DIFFERENT SOLUBILITY ACCUMULATES IN THE BRAIN OF ALZHEIMERS-DISEASE

被引:52
作者
HARIGAYA, Y
SHOJI, M
KAWARABAYASHI, T
KANAI, M
NAKAMURA, T
IIZUKA, T
IGETA, Y
SAIDO, TC
SAHARA, N
MORI, H
HIRAI, S
机构
[1] GUNMA UNIV,SCH MED,DEPT NEUROL,MAEBASHI,GUMMA 371,JAPAN
[2] TOKYO METROPOLITAN INST MED SCI,DEPT MOLEC BIOL,BUNKYO KU,TOKYO 113,JAPAN
[3] TOKYO INST PSYCHIAT,DEPT MOLEC BIOL,SETAGAYA KU,TOKYO 156,JAPAN
关键词
D O I
10.1006/bbrc.1995.1912
中图分类号
Q5 [生物化学]; Q7 [分子生物学];
学科分类号
071010 ; 081704 ;
摘要
Serial extraction study of Alzheimer's disease (AD) and control brains revealed 4, 3.7 and 3 kD amyloid beta protein (A beta) species accumulated in AD brains. In the fractions extracted with TBS, 10% SDS and formic acid, considerable amounts of A beta species were recovered in SDS fractions besides TBS and formic acid tractions. Immunoblotting with several site-specific antibodies confirmed not only the presence of 4 kD A beta starting at the first amino acid of A beta but also 2 smaller A beta species with modification of their amino-termini in the highly resolutional Tris/Tricine gel system. A beta solubility using these solvents was associated with both modification of the amino-terminus and length of carboxyl-terminus of A beta. Especially, a large amount of modified A beta was found to be accumulated as forms with different solubility in AD brains. (C) 1995 Academic Press, Inc.
引用
收藏
页码:1015 / 1022
页数:8
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