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| Content Provider | Royal Society of Chemistry (RSC) |
|---|---|
| Author | Santucci, Laura Bruschi, Maurizio Petretto, Andrea Federici, Giorgio Urbani, Andrea Candiano, Giovanni Pavone, Barbara Gusmano, Rosanna Ghiggeri, Gian Marco |
| Copyright Year | 2011 |
| Abstract | Apolipoprotein A1 (apoA1) is a component of the high density lipoproteins (HDL) that regulates the transport of cholesterol between the liver and peripheral cells and modulates the removal of any excess of cholesterol from membranes. Any variation in apoA1 composition may modify the plasma lipid profile and be involved in atherogenesis. We investigated apoA1 composition in plasma of 6 children with nephrotic syndrome, a condition characterized by high levels of cholesterol in plasma and by a high risk to develop atherosclerosis. Non-denaturing two-dimensional electrophoresis (Nat/SDS-PAGE), mass spectrometry, western blot and pull down experiments were done to characterize proteins and define putative interactions. ApoA1 was resolved in 12 variants, 6 of which had a slightly lower molecular weight (18–19 KDa) and migrated on the same axes of the β chain of haptoglobin (Hp). Low molecular weight apoA1 were observed in carriers of different Hp haplotypes (including one homozygous for the rare ββα1α1) ruling out any contaminant effect of co-migration of apoA1 with Hp α2 chain. Overall, apoA1 isoforms were much more present in plasma of nephrotic patients compared to a normal profile. These findings show that apoA1 plasma in nephrotic syndrome is heterogeneous in terms of molecular weight. Low molecular weight fragments lack internal structural domains and likely form macro-aggregates with Hp. Fragmentation and transport of apoA1 may be involved in the general disorder of lipid metabolism that characterizes nephrotic syndrome. |
| Starting Page | 659 |
| Ending Page | 666 |
| Page Count | 8 |
| File Format | HTM / HTML PDF |
| ISSN | 1742206X |
| Volume Number | 7 |
| Issue Number | 3 |
| Journal | Molecular BioSystems |
| DOI | 10.1039/c0mb00127a |
| Language | English |
| Publisher | Royal Society of Chemistry |
| Access Restriction | Open |
| Subject Keyword | Apolipoprotein A1 Western blot Polyacrylamide gel electrophoresis Liver Hp Metabolism Lipid Syndrome Blood plasma Zygosity High-density lipoprotein Haptoglobin Atherosclerosis Electrophoresis Mass spectrometry |
| Content Type | Text |
| Resource Type | Article |
| Subject | Molecular Biology Biotechnology |
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