Ancestral network module regulating prdm1 expression in the lamprey neural plate border

Area of Science:

• Developmental biology
• Evolutionary developmental biology
• Gene regulation

Background:

• prdm1 is a key transcriptional regulator with varied roles in vertebrate and invertebrate development.
• Its function in neural crest specification differs between zebrafish and mice, and its broader role remains unclear.
• Understanding prdm1 regulation is essential for comprehending embryonic development.

Purpose of the Study:

• To investigate the expression pattern, function, and upstream regulatory factors of prdm1 during lamprey neural crest development.
• To explore the conserved ancestral role of prdm1 in neural crest formation across species.
• To elucidate the specific transcription factors that control prdm1 expression in the neural plate border.

Main Methods:

• Analysis of prdm1 gene expression patterns in lamprey embryos.
• Investigating the regulatory inputs on prdm1 using molecular techniques.
• Comparative analysis of prdm1 function across different species.

Main Results:

• prdm1 is highly expressed in the neural plate border of lampreys, suggesting a conserved role in neural crest formation.
• Lamprey prdm1 expression is activated by Ap-2 and Msx transcription factors.
• prdm1 expression in lampreys is independent of Pax3/7 and Zic factors.

Conclusions:

• prdm1 plays a conserved role in neural crest development, dating back to early vertebrate evolution.
• Ap-2 and Msx are identified as key upstream activators of prdm1 in the lamprey neural plate border.
• The findings contribute to understanding the evolutionary regulation of neural crest development.