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Published on: November 17, 2016
Lessons in congenital and acquired renal disease from alpha8 integrin mutant mice
1Medizinische Klinik IV, Universität Erlangen-Nürnberg, Germany. andrea.hartner@rzmail.uni-erlangen.de
Abstract:
Cell-matrix interactions have been shown to be important during renal development and in various forms of kidney diseases. The alpha8 integrin chain is expressed during early nephrogenesis. In alpha8 gene mutated mice, lack of alpha8 results in unilateral or bilateral renal agenesis in part of the animals. No human disease with mutations in the alpha8 integrin gene locus has been described to date. However, similar renal defects are displayed in disorders with mutations affecting other adhesion molecules. In the kidneys of adult mice, alpha8 is expressed in vascular smooth muscle cells and mesangial cells of the glomerulus. Although alpha8-deficient mice surviving with reduced renal mass do not show any glomerular abnormalities, they have an increased susceptibility to glomerular damage upon mechanical or inflammatory stress of glomerular cells. Thus, alpha8 seems to be important for normal renal development and could help to maintain the structural integrity of the glomerulus following injury during various kidney diseases.
Insights
The alpha8 integrin is crucial for kidney development and maintaining glomerular structure. Its absence can lead to renal agenesis and increased susceptibility to kidney damage.
Area of Science:
- Cell biology
- Developmental biology
- Nephrology
Background:
- Cell-matrix interactions play a vital role in kidney development and disease.
- The alpha8 integrin chain is expressed during early kidney formation (nephrogenesis).
Purpose of the Study:
- To investigate the role of alpha8 integrin in renal development and kidney disease.
- To determine the function of alpha8 integrin in maintaining glomerular integrity.
Main Methods:
- Analysis of alpha8 gene mutated mice exhibiting renal defects.
- Examination of alpha8 integrin expression in adult mouse kidneys.
- Assessment of glomerular damage susceptibility in alpha8-deficient mice under stress.
Main Results:
- Absence of alpha8 integrin in mice can cause renal agenesis.
- Alpha8 integrin is present in adult mouse kidney vascular smooth muscle and mesangial cells.
- Alpha8-deficient mice show increased susceptibility to glomerular damage from mechanical or inflammatory stress.
Conclusions:
- Alpha8 integrin is essential for normal kidney development.
- Alpha8 integrin contributes to maintaining glomerular structural integrity, particularly following injury in kidney diseases.
