Nance-Horan-syndrome-like 1b controls mesodermal cell migration by regulating protrusion and actin dynamics during...

Area of Science:

• Cell biology
• Developmental biology
• Biochemistry

Background:

• Cell migration is vital for embryonic development, healing, immunity, and cancer.
• The Rac1-WAVE-Arp2/3 pathway regulates mesenchymal cell migration via actin polymerization.
• NHSL1 was identified as a potential negative regulator of cell migration in vitro.

Purpose of the Study:

• To investigate the in vivo function of Nhsl1b in zebrafish mesodermal cell migration.
• To determine Nhsl1b's role in regulating cell speed, migration persistence, and protrusion dynamics.

Main Methods:

• Utilized zebrafish gastrulation as a model system for in vivo analysis.
• Performed loss and gain of function experiments for nhsl1b.
• Analyzed cell migration, protrusion dynamics, and actin polymerization rates.

Main Results:

• Nhsl1b is essential for proper mesodermal cell migration, affecting speed and persistence.
• Nhsl1b localizes to protrusions and modulates their length and lifetime.
• Nhsl1b knockdown increases F-actin assembly and retrograde flow within protrusions.

Conclusions:

• Nhsl1b acts as a cell type-specific regulator of cell migration in vivo.
• This study underscores the importance of studying actin dynamics regulators in physiological contexts.
• NHSL1B plays a critical role in embryonic development through modulation of cell motility.