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| Content Provider | Springer Nature Link |
|---|---|
| Author | Valente, Raphael C. Capella, Luiz S. Nascimento, Clarissa R. Braga, Filipe Echevarria Lima, Juliana Lopes, Aníbal G. Capella, Márcia A. M. |
| Copyright Year | 2007 |
| Abstract | Although the kidney is a major target in hypertension, several studies have correlated important immune alterations with the development of hypertension in spontaneously hypertensive rats (SHR), like increased secretion of pro-inflammatory cytokines, inflammatory infiltration in kidneys and thymic atrophy. Because adenosine-triphosphate-binding cassette sub-family B member 1 (ABCB1; P-glycoprotein) and adenosine-triphosphate-binding cassette sub-family C member 1 (ABCC1; multidrug resistance protein 1), two proteins first described in multidrug resistant tumors, physiologically transport several immune mediators and are required for the adequate functioning of the immune system, we aimed to measure the expression and activity of these proteins in peripheral blood mononuclear cells (PBMC), thymocytes, and also kidneys of normotensive Wistar Kyoto rats and SHR. Our results showed that ABCB1, but not ABCC1, activity was diminished (nearly 50%) in PBMC. Moreover, Abcb1b gene was downregulated in PBMC and kidney of SHR and this was not counterbalanced by an upregulation of its homolog Abcb1a, suggesting that the diminished activity is due to downregulation of the gene. No alteration was detected in ABCB1 activity in SHR thymocytes, indicating that this downregulation occurs after lymphocytes leave the primary lymphoid organs. Even though it is not known at present which parameter(s) is(are) responsible for this downregulation, it may contribute for the altered immune response observed in hypertension and to possible altered drug disposition in hypertensive individuals, resulting in greater drug interaction and increased drug toxicity. |
| Starting Page | 359 |
| Ending Page | 368 |
| Page Count | 10 |
| File Format | |
| ISSN | 00316768 |
| Journal | Pflügers Archiv |
| Volume Number | 456 |
| Issue Number | 2 |
| e-ISSN | 14322013 |
| Language | English |
| Publisher | Springer-Verlag |
| Publisher Date | 2007-12-04 |
| Publisher Place | Berlin, Heidelberg |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | ABCB1 ABCC1 Hypertension PBMC Multidrug resistance Flow cytometry Human Physiology |
| Content Type | Text |
| Resource Type | Article |
| Subject | Physiology Physiology (medical) Clinical Biochemistry |
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