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Smoc2 modulates embryonic myelopoiesis during zebrafish development
Hendrik Mommaerts1, Camila V Esguerra, Ursula Hartmann
1Laboratory for Developmental and Stem Cell Biology, Skeletal Biology and Engineering Research Center, Department of Development and Regeneration, KU Leuven - University of Leuven, Leuven, Belgium.
Summary
Secreted modular protein connecting cadherins 2 (SMOC2) is vital for myeloid cell development in zebrafish embryos. Smoc2 influences Bmp target gene transcription, impacting hemangioblast and myeloid progenitor cell specification.
Area of Science:
- Developmental Biology
- Molecular Biology
- Genetics
Background:
- SMOC2, a matricellular protein, influences extracellular signaling, cell adhesion, and metastasis in mice.
- SMOC2 is linked to vitiligo and craniofacial/dental defects.
- The role of Smoc2 in early zebrafish development remains unknown.
Purpose of the Study:
- To investigate the function of Smoc2 during early zebrafish embryonic development.
- To elucidate the molecular mechanisms underlying Smoc2's role in hematopoiesis.
Main Methods:
- Analysis of smoc2 expression patterns in zebrafish embryos.
- Morpholino-induced knockdown (morphants) to assess Smoc2 function.
- Molecular analysis of gene expression, including Bmp target genes.
Main Results:
- Smoc2 is ubiquitously expressed early in zebrafish development, becoming anteriorly restricted later.
- Smoc2 knockdown leads to ventralization and myelopoietic defects in the anterior lateral plate mesoderm.
- Impaired hemangioblast development and myeloid progenitor specification were observed.
- Down-regulation of Bmp target genes in smoc2 morphants.
Conclusions:
- Smoc2 is essential for myeloid cell development in the anterior lateral plate mesoderm of zebrafish embryos.
- Smoc2 regulates Bmp target gene transcription without affecting initial mesoderm patterning.
