Post-prandial lipid metabolism, lipid-modulating agents and cerebrovascular integrity: Implications for dementia risk
Amyloid-β (Aβ) is secreted as an apolipoprotein of nascent triglyceride-rich lipoproteins (TRL) derived from both liver and intestine, but is better recognized as the principal protein component of senile plaque in subjects with Alzheimer's disease. Recent studies suggest that exaggerated expos...
| Main Authors: | , , , , , |
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| Format: | Journal Article |
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Elseiver Ireland Ltd
2010
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| Online Access: | http://hdl.handle.net/20.500.11937/14673 |
| _version_ | 1848748685751484416 |
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| author | Pallebage-Gamarallage, Menuka Takechi, Ryusuke Lam, V. Galloway, Susan Dhaliwal, Satvinder Mamo, John |
| author_facet | Pallebage-Gamarallage, Menuka Takechi, Ryusuke Lam, V. Galloway, Susan Dhaliwal, Satvinder Mamo, John |
| author_sort | Pallebage-Gamarallage, Menuka |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | Amyloid-β (Aβ) is secreted as an apolipoprotein of nascent triglyceride-rich lipoproteins (TRL) derived from both liver and intestine, but is better recognized as the principal protein component of senile plaque in subjects with Alzheimer's disease. Recent studies suggest that exaggerated exposure to plasma Aβ can compromise cerebrovascular integrity, resulting thereafter in blood to brain delivery of plasma proteins including TRL-Aβ. Parenchymal deposits of Aβ show significant immunoreactivity to apolipoprotein B (apo B), consistent with the notion of lipoprotein-Aβ entrapment. In wild type mice chronically fed physiologically relevant diets, saturated fats (SFA) enhance chylomicron-Aβ concomitant with disturbances in blood–brain barrier integrity.Similarly, dietary cholesterol promotes cerebrovascular extravasation of apo B lipoprotein-Aβ. In this study, we investigated the effects of Atorvastatin, Pravastatin and Probucol on dietary-fat induced disturbances in BBB function. Atorvastatin, a lipid soluble HMG-CoA reductase inhibitor prevented SFA induced parenchymal extravasation of apo B-Aβ at 28 days when incorporated into the diet at 20 mg/kg. In contrast, Pravastatin a water soluble agent had no effect on BBB integrity at an equivalent dose. In cholesterol supplemented mice, Probucol maintained BBB function and extravasation of apo B-Aβ was not evident. The findings suggest that some lipid-modulating agents may be effective in ameliorating the negative effects of saturated fats and cholesterol on cerebrovascular integrity. |
| first_indexed | 2025-11-14T07:08:59Z |
| format | Journal Article |
| id | curtin-20.500.11937-14673 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T07:08:59Z |
| publishDate | 2010 |
| publisher | Elseiver Ireland Ltd |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-146732017-09-13T16:04:40Z Post-prandial lipid metabolism, lipid-modulating agents and cerebrovascular integrity: Implications for dementia risk Pallebage-Gamarallage, Menuka Takechi, Ryusuke Lam, V. Galloway, Susan Dhaliwal, Satvinder Mamo, John Alzheimer's disease Amyloid-beta Chylomicrons Blood–brain barrier Amyloid-β (Aβ) is secreted as an apolipoprotein of nascent triglyceride-rich lipoproteins (TRL) derived from both liver and intestine, but is better recognized as the principal protein component of senile plaque in subjects with Alzheimer's disease. Recent studies suggest that exaggerated exposure to plasma Aβ can compromise cerebrovascular integrity, resulting thereafter in blood to brain delivery of plasma proteins including TRL-Aβ. Parenchymal deposits of Aβ show significant immunoreactivity to apolipoprotein B (apo B), consistent with the notion of lipoprotein-Aβ entrapment. In wild type mice chronically fed physiologically relevant diets, saturated fats (SFA) enhance chylomicron-Aβ concomitant with disturbances in blood–brain barrier integrity.Similarly, dietary cholesterol promotes cerebrovascular extravasation of apo B lipoprotein-Aβ. In this study, we investigated the effects of Atorvastatin, Pravastatin and Probucol on dietary-fat induced disturbances in BBB function. Atorvastatin, a lipid soluble HMG-CoA reductase inhibitor prevented SFA induced parenchymal extravasation of apo B-Aβ at 28 days when incorporated into the diet at 20 mg/kg. In contrast, Pravastatin a water soluble agent had no effect on BBB integrity at an equivalent dose. In cholesterol supplemented mice, Probucol maintained BBB function and extravasation of apo B-Aβ was not evident. The findings suggest that some lipid-modulating agents may be effective in ameliorating the negative effects of saturated fats and cholesterol on cerebrovascular integrity. 2010 Journal Article http://hdl.handle.net/20.500.11937/14673 10.1016/j.atherosclerosissup.2010.04.002 Elseiver Ireland Ltd restricted |
| spellingShingle | Alzheimer's disease Amyloid-beta Chylomicrons Blood–brain barrier Pallebage-Gamarallage, Menuka Takechi, Ryusuke Lam, V. Galloway, Susan Dhaliwal, Satvinder Mamo, John Post-prandial lipid metabolism, lipid-modulating agents and cerebrovascular integrity: Implications for dementia risk |
| title | Post-prandial lipid metabolism, lipid-modulating agents and cerebrovascular integrity: Implications for dementia risk |
| title_full | Post-prandial lipid metabolism, lipid-modulating agents and cerebrovascular integrity: Implications for dementia risk |
| title_fullStr | Post-prandial lipid metabolism, lipid-modulating agents and cerebrovascular integrity: Implications for dementia risk |
| title_full_unstemmed | Post-prandial lipid metabolism, lipid-modulating agents and cerebrovascular integrity: Implications for dementia risk |
| title_short | Post-prandial lipid metabolism, lipid-modulating agents and cerebrovascular integrity: Implications for dementia risk |
| title_sort | post-prandial lipid metabolism, lipid-modulating agents and cerebrovascular integrity: implications for dementia risk |
| topic | Alzheimer's disease Amyloid-beta Chylomicrons Blood–brain barrier |
| url | http://hdl.handle.net/20.500.11937/14673 |