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Isolation and Culture of Cells from the Nephrogenic Zone of the Embryonic Mouse Kidney
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Engineering kidney developmental trajectory using culture boundary conditions.

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    Developing 3D hydrogel cultures captures kidney development in real time, revealing how matrix properties influence nephron formation and tissue shape. This method aids in studying congenital kidney diseases and engineering kidney tissues.

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    Area of Science:

    • Developmental Biology
    • Biomaterials Science
    • Regenerative Medicine

    Background:

    • Traditional kidney explant cultures at air-liquid interfaces hinder 3D structural analysis and interpretation of developmental data.
    • Capturing dynamic processes like tubule tip rearrangement and branching defects is crucial for understanding kidney morphogenesis.

    Purpose of the Study:

    • To develop a 3D hydrogel embedding technique for real-time capture of kidney morphogenesis.
    • To investigate the influence of matrix properties (stiffness, adhesion) on kidney development and nephron formation.
    • To provide a platform for studying congenital kidney diseases and advancing kidney tissue engineering.

    Main Methods:

    • Development of a 3D hydrogel embedding culture technique for kidney explants.
    • Utilizing engineered acrylated hyaluronic acid hydrogels to independently tune matrix stiffness and adhesion.
    • Perturbing glial cell-derived neurotrophic factor (GDNF)-REarranged during Transfection (RET) tyrosine kinase signaling to observe branching defects.

    Main Results:

    • 3D culture better approximates in vivo-like niche spacing and tubule tip rearrangement.
    • Matrix concentration affects nephron number per ureteric bud (UB) tip and tip spacing.
    • Matrix stiffness exhibits a "Goldilocks effect" on nephron balance (~2 kPa), while increased adhesion enhances the nephron per UB tip ratio.
    • Sufficient stiffness and adhesion are essential for maintaining kidney shape.

    Conclusions:

    • The 3D hydrogel culture technique captures large-scale, in vivo-like kidney morphogenesis.
    • This platform is suitable for contrasting normal development with congenital kidney disease contexts.
    • Understanding boundary condition mechanics in kidney development is vital for fundamental research and engineering kidney replacement tissues.