| RRC ID |
41951
|
| 著者 |
Murakami K, Irie K, Morimoto A, Ohigashi H, Shindo M, Nagao M, Shimizu T, Shirasawa T.
|
| タイトル |
Neurotoxicity and physicochemical properties of Abeta mutant peptides from cerebral amyloid angiopathy: implication for the pathogenesis of cerebral amyloid angiopathy and Alzheimer's disease.
|
| ジャーナル |
J Biol Chem
|
| Abstract |
Cerebral amyloid angiopathy (CAA) due to beta-amyloid (Abeta) is one of the specific pathological features of familial Alzheimer's disease. Abeta mainly consisting of 40- and 42-mer peptides (Abeta40 and Abeta42) exhibits neurotoxicity and aggregative abilities. All of the variants of Abeta40 and Abeta42 found in CAA were synthesized in a highly pure form and examined for neurotoxicity in PC12 cells and aggregative ability. All of the Abeta40 mutants at positions 22 and 23 showed stronger neurotoxicity than wild-type Abeta40. Similar tendency was observed for Abeta42 mutants at positions 22 and 23 whose neurotoxicity was 50-200 times stronger than that of the corresponding Abeta40 mutants, suggesting that these Abeta42 mutants are mainly involved in the pathogenesis of CAA. Although the aggregation of E22G-Abeta42 and D23N-Abeta42 was similar to that of wild-type Abeta42, E22Q-Abeta42 and E22K-Abeta42 aggregated extensively, supporting the clinical evidence that Dutch and Italian patients are diagnosed as hereditary cerebral hemorrhage with amyloidosis. In contrast, A21G mutation needs alternative explanation with the exception of physicochemical properties of Abeta mutants. Attenuated total reflection-Fourier transform infrared spectroscopy spectra suggested that beta-sheet content of the Abeta mutants correlates with their aggregation. However, beta-turn is also a critical secondary structure because residues at positions 22 and 23 that preferably form two-residue beta-turn significantly enhanced the aggregative ability.
|
| 巻・号 |
278(46)
|
| ページ |
46179-87
|
| 公開日 |
2003-11-14
|
| DOI |
10.1074/jbc.M301874200
|
| PII |
S0021-9258(20)82388-6
|
| PMID |
12944403
|
| MeSH |
Alzheimer Disease / metabolism
Amino Acid Sequence
Amyloid beta-Peptides / chemistry*
Amyloid beta-Peptides / genetics*
Amyloid beta-Peptides / metabolism
Amyloidosis
Animals
Coloring Agents / pharmacology
Humans
Hydrogen Bonding
Microscopy, Electron
Models, Molecular
Molecular Sequence Data
Mutation
PC12 Cells
Peptide Fragments / chemistry
Peptide Fragments / metabolism
Peptides / chemistry
Protein Conformation
Protein Structure, Secondary
Rats
Sequence Homology, Amino Acid
Spectrometry, Mass, Matrix-Assisted Laser Desorption-Ionization
Spectroscopy, Fourier Transform Infrared
Tetrazolium Salts / pharmacology
Thiazoles / pharmacology
Time Factors
|
| IF |
4.238
|
| 引用数 |
176
|
|
WOS 分野
|
BIOCHEMISTRY & MOLECULAR BIOLOGY
|
| リソース情報 |
| ヒト・動物細胞 |
PC-12(RCB0009) |
