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Xmab21l3 mediates dorsoventral patterning in Xenopus laevis
Jyotsna Sridharan1, Tomomi Haremaki, Ye Jin
1Biology Department, Queens College, and the Graduate School and University Center, City University of New York, Flushing, NY 11367, USA.
Mechanisms of Development
|May 22, 2012
Summary
We identified Xenopus mab21-like 3 (Xmab21l3) as crucial for vertebrate embryonic dorsal development. This gene represses ventralizing signals by regulating BMP/Smad and Ras/ERK pathways.
Area of Science:
- Developmental Biology
- Molecular Biology
- Genetics
Background:
- Dorsoventral (DV) axis specification is essential for vertebrate embryonic regionalization.
- The molecular mechanisms regulating early dorsal development remain incompletely understood.
Purpose of the Study:
- To identify novel factors involved in dorsal axis formation in vertebrate embryos.
- To elucidate the function and mechanism of Xenopus mab21-like 3 (Xmab21l3) in early development.
Main Methods:
- Gene misexpression and morpholino-mediated knockdown in Xenopus laevis embryos.
- Analysis of embryonic germ layer differentiation (mesoderm and ectoderm).
- Investigation of signaling pathway regulation (BMP/Smad, Ras/ERK).
Main Results:
- Overexpression of Xmab21l3 caused dorsalization of gastrula mesoderm and neurula ectoderm.
- Knockdown of Xmab21l3 inhibited dorsal differentiation of these germ layers.
- Xmab21l3 is a chordate-specific gene containing a conserved Mab21 domain.
Conclusions:
- Xmab21l3 is essential for dorsal development in Xenopus embryos.
- Xmab21l3 functions by repressing ventralizing activity through BMP/Smad and Ras/ERK signaling pathways.
