| First Author | Murata T | Year | 2016 |
| Journal | Sci Rep | Volume | 6 |
| Pages | 29450 | PubMed ID | 27377778 |
| Mgi Jnum | J:276350 | Mgi Id | MGI:6221324 |
| Doi | 10.1038/srep29450 | Citation | Murata T, et al. (2016) COL4A6 is dispensable for autosomal recessive Alport syndrome. Sci Rep 6:29450 |
| abstractText | Alport syndrome is caused by mutations in the genes encoding alpha3, alpha4, or alpha5 (IV) chains. Unlike X-linked Alport mice, alpha5 and alpha6 (IV) chains are detected in the glomerular basement membrane of autosomal recessive Alport mice, however, the significance of this finding remains to be investigated. We therefore generated mice lacking both alpha3 and alpha6 (IV) chains and compared their renal function and survival with Col4a3 knockout mice of 129 x 1/Sv background. No significant difference was observed in the renal function or survival of the two groups, or when the mice were backcrossed once to C57BL/6 background. However, the survival of backcrossed double knockout mice was significantly longer than that of the mice of 129 x 1/Sv background, which suggests that other modifier genes were involved in this phenomenon. In further studies we identified two Alport patients who had a homozygous mutation in intron 46 of COL4A4. The alpha5 and alpha6 (IV) chains were focally detected in the glomerular basement membrane of these patients. These findings indicate that although alpha5 and alpha6 (IV) chains are induced in the glomerular basement membrane in autosomal recessive Alport syndrome, their induction does not seem to play a major compensatory role. |
