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| Content Provider | Springer Nature Link |
|---|---|
| Author | Tamaki, Chihiro Ohtsuki, Sumio Iwatsubo, Takeshi Hashimoto, Tadafumi Yamada, Kaoru Yabuki, Chiori Terasaki, Tetsuya |
| Copyright Year | 2006 |
| Abstract | To identify the molecules responsible for amyloid β-peptide (1–40) (Aβ(1–40)) uptake by the liver, which play a major role in the systemic clearance of Aβ(1–40).The liver uptake index method was used to examine the mechanisms of Aβ(1–40) uptake by the liver in vivo.[$^{125}$I]Aβ(1–40) uptake by the rat liver was concentration-dependent (50% saturation concentration = 302 nM). The inhibitory spectrum of Aβ fragments indicated that 17–24 in Aβ (LVFFAEDV) was the putative sequence responsible for hepatic Aβ(1–40) uptake. Receptor-associated protein (RAP) inhibited [$^{125}$I]Aβ(1–40) uptake by 48%. RAP-deficient mice, in which low-density lipoprotein receptor-related protein 1 (LRP-1) expression was suppressed, showed a 46% reduction in [$^{125}$I]Aβ(1–40) uptake by the liver. siRNA-mediated suppression of LRP-1 expression in the liver resulted in a reduction in [$^{125}$I]Aβ(1–40) uptake by 64%. Both the expression of LRP-1 in the liver and the hepatic Aβ(1–40) uptake were significantly reduced in 13-month-old rats compared with 7-week-old rats.LRP-1 is the major receptor responsible for the saturable uptake of plasma free Aβ(1–40) by the liver. Reduction of LRP-1 expression will play a role in the age-related reduction in hepatic Aβ(1–40) clearance. |
| Starting Page | 1407 |
| Ending Page | 1416 |
| Page Count | 10 |
| File Format | |
| ISSN | 07248741 |
| Journal | Pharmaceutical Research |
| Volume Number | 23 |
| Issue Number | 7 |
| e-ISSN | 1573904X |
| Language | English |
| Publisher | Springer-Verlag |
| Publisher Date | 2006-06-21 |
| Publisher Place | New York |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | amyloid β-peptide clearance liver uptake index low-density lipoprotein receptor-related protein 1 receptor-mediated endocytosis Pharmacology/Toxicology Pharmacy Biochemistry Medical Law Biomedical Engineering |
| Content Type | Text |
| Resource Type | Article |
| Subject | Organic Chemistry Pharmacology Molecular Medicine Pharmacology (medical) Biotechnology Pharmaceutical Science |
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