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Updated: Jul 16, 2026
08:06
Isolation and Culture of Cells from the Nephrogenic Zone of the Embryonic Mouse Kidney
Published on: April 22, 2011
Pax2 and pax8 regulate branching morphogenesis and nephron differentiation in the developing kidney
Melina Narlis1, David Grote, Yaned Gaitan
1McGill Cancer Centre and Biochemistry Department, McGill University, 3655 Promenade Sir-William-Osler, Montreal, Quebec H3G 1Y6, Canada.
Journal of the American Society of Nephrology : JASN
|February 23, 2007
Summary
Pax2 and Pax8 genes are crucial for mouse kidney development. Reduced Pax2/8 gene dosage impairs nephron differentiation and branching morphogenesis, revealing their essential roles in metanephric kidney formation.
Area of Science:
- Developmental Biology
- Genetics
- Nephrology
Background:
- Pax genes are critical regulators of kidney development.
- Homozygous Pax2 inactivation leads to renal agenesis, limiting study of later functions.
- Pax8 is a related gene coexpressed with Pax2 in the developing kidney.
Purpose of the Study:
- To investigate the role of Pax2 and Pax8 in later stages of metanephric kidney development.
- To analyze kidney development in compound heterozygous Pax2(+/-)Pax8(+/-) mouse embryos.
Main Methods:
- Analysis of compound heterozygous Pax2(+/-)Pax8(+/-) mouse embryos.
- Morphological assessment of kidney development, including ureter tips and nephron number.
- Molecular analysis of gene expression (Lim1, Wnt11, Ret, GDNF) and apoptosis in developing nephrons.
Main Results:
- Pax2(+/-)Pax8(+/-) metanephric kidneys showed severe hypodysplasia with reduced ureter tips and nephron numbers.
- Expression of Lim1 was significantly reduced, and apoptosis increased in developing nephrons.
- Distal tubule formation was impaired, and Wnt11 expression was reduced at ureter tips.
Conclusions:
- Pax2 and Pax8 play crucial roles in nephron differentiation and branching morphogenesis.
- Reduced Pax2/8 gene dosage affects specific nephron segments and ureter tip development.
- These findings highlight the essential function of Pax2 and Pax8 in metanephric kidney development.
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