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Technique to Target Microinjection to the Developing Xenopus Kidney
Published on: May 3, 2016
A function for dystroglycan in pronephros development in Xenopus laevis
Valérie Bello1, Cathy Sirour, Nicole Moreau
1Université Pierre et Marie Curie-Paris 6 UMR CNRS 7622, Laboratoire de Biologie du Développement, équipe Matrice extracellulaire et Développement, 9 quai Saint-Bernard, 75005 Paris, France. valerie.bello@snv.jussieu.fr
Developmental Biology
|April 2, 2008
Summary
Dystroglycan (Dg) is crucial for kidney development in Xenopus. Loss of Dg disrupts basement membrane assembly and cell proliferation, leading to severe kidney malformations.
Area of Science:
- Developmental Biology
- Cell Biology
- Molecular Biology
Background:
- Dystroglycan (Dg) functions as a laminin receptor at the cell-basement membrane interface.
- Dg is implicated in maintaining skeletal muscle stability, neuroepithelial morphogenesis, and regulating cell signaling.
- Its specific role in kidney development is not fully understood.
Purpose of the Study:
- To investigate the expression and function of Dystroglycan during pronephros development in Xenopus laevis.
- To elucidate the role of Dg in basement membrane organization, cell proliferation, and tubule formation in the developing kidney.
Main Methods:
- Analysis of Dg-mRNA and protein expression at various developmental stages of the Xenopus pronephros.
- Loss-of-function experiments using Dg antisense morpholinos and dominant-negative mutants.
- Assessment of basement membrane integrity, pronephric tubule and duct development, and cell proliferation.
Main Results:
- Dg expression is initiated during pronephric epithelialization and continues through tubulogenesis.
- Loss of Dg function results in basement membrane disorganization and severe reduction in pronephric tubules and ducts, potentially causing renal agenesis.
- Dg depletion leads to diminished proliferation of pronephric cell progenitors.
Conclusions:
- Dystroglycan is essential for laminin-1 assembly and the anchoring of pronephric cells to the basement membrane during early kidney development.
- Dg signaling pathways appear to regulate cell proliferation, which is critical for pronephric tubule formation and growth.
