ccr7 affects both morphogenesis and differentiation during early Xenopus embryogenesis.

Area of Science:

• Developmental Biology
• Molecular Biology
• Xenopus laevis Research

Background:

• Chemokines are vital for early embryogenesis, influencing morphogenesis and cell differentiation.
• The role of CC-type chemokine receptor 7S (ccr7.S) in early development remains largely uncharacterized.

Purpose of the Study:

• To elucidate the function of Xenopus laevis ccr7.S during early embryonic development.
• To investigate the impact of ccr7.S on key developmental processes like gastrulation and cell differentiation.

Main Methods:

• Analysis of ccr7.S transcript distribution in early Xenopus embryos.
• Overexpression and knockdown studies of ccr7.S mRNA.
• Keller sandwich explant assays to assess cell migration.
• Animal cap assays to evaluate cell differentiation markers.

Main Results:

• ccr7.S transcripts are ubiquitously expressed in early embryos.
• Dorsal ccr7.S overexpression inhibited gastrulation and caused developmental abnormalities, including short axes and open neural folds.
• Ventral overexpression induced secondary axes and upregulated chrd.1, while animal cap assays showed increased neural and cement gland markers.
• ccr7.S knockdown impaired gastrulation and reduced chrd.1 expression.

Conclusions:

• ccr7.S plays a significant role in Xenopus embryonic morphogenesis and cell differentiation.
• ccr7.S influences cell migration and potentially dorsal-ventral patterning during gastrulation.