Siblings with Alport's syndrome showing unique staining patterns for [alpha]5(IV) and [alpha]6(IV) chains of collagen type IV
Here we report two brothers with electron-microscopically diagnosed Alport's syndrome (AS) who showed normal staining patterns for the α1(IV)-α4(IV) chains of collagen type IV, but abnormal expression of the α5(IV) and α6(IV) chains. Both patients had microscopic hematuria and mild proteinuria...
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Published in | Clinical and experimental nephrology Vol. 14; no. 3; p. 283 |
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Main Authors | , , , , |
Format | Journal Article |
Language | English |
Published |
Tokyo
Springer Nature B.V
01.06.2010
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Abstract | Here we report two brothers with electron-microscopically diagnosed Alport's syndrome (AS) who showed normal staining patterns for the α1(IV)-α4(IV) chains of collagen type IV, but abnormal expression of the α5(IV) and α6(IV) chains. Both patients had microscopic hematuria and mild proteinuria from around 10 years old, and had renal biopsies at 23 (older) and 26 (younger) years old due to increased proteinuria (0.5-0.8 g/day) with normal renal function. A skin biopsy of the patients' mother showed similar abnormal staining patterns for the α5(IV) and α6(IV) chains in the skin basement membranes. Both of them showed slow progression of renal dysfunction and no extrarenal manifestations. The existences of incomplete α3,α4,α5(IV) molecules in the glomerular basement membrane (GBM) and inadequately formed α5,α5,α6(IV) molecules are suggested for these patients. A missense mutation of the COL4A5 gene may present in this family as possible X-linked inheritance and a mild form of AS.[PUBLICATION ABSTRACT] |
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AbstractList | Here we report two brothers with electron-microscopically diagnosed Alport's syndrome (AS) who showed normal staining patterns for the α1(IV)-α4(IV) chains of collagen type IV, but abnormal expression of the α5(IV) and α6(IV) chains. Both patients had microscopic hematuria and mild proteinuria from around 10 years old, and had renal biopsies at 23 (older) and 26 (younger) years old due to increased proteinuria (0.5-0.8 g/day) with normal renal function. A skin biopsy of the patients' mother showed similar abnormal staining patterns for the α5(IV) and α6(IV) chains in the skin basement membranes. Both of them showed slow progression of renal dysfunction and no extrarenal manifestations. The existences of incomplete α3,α4,α5(IV) molecules in the glomerular basement membrane (GBM) and inadequately formed α5,α5,α6(IV) molecules are suggested for these patients. A missense mutation of the COL4A5 gene may present in this family as possible X-linked inheritance and a mild form of AS.[PUBLICATION ABSTRACT] |
Author | Fujigaki, Yoshihide Tsuji, Takayuki Sakakima, Masanori Sado, Yoshikazu Hishida, Akira |
Author_xml | – sequence: 1 givenname: Takayuki surname: Tsuji fullname: Tsuji, Takayuki – sequence: 2 givenname: Yoshihide surname: Fujigaki fullname: Fujigaki, Yoshihide – sequence: 3 givenname: Masanori surname: Sakakima fullname: Sakakima, Masanori – sequence: 4 givenname: Yoshikazu surname: Sado fullname: Sado, Yoshikazu – sequence: 5 givenname: Akira surname: Hishida fullname: Hishida, Akira |
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Title | Siblings with Alport's syndrome showing unique staining patterns for [alpha]5(IV) and [alpha]6(IV) chains of collagen type IV |
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