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Determination01:51

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During embryogenesis, cells become progressively committed to different fates through a two-step process: specification followed by determination. Specification is demonstrated by removing a segment of an early embryo, “neutrally” culturing the tissue in vitro—for example, in a petri dish with simple medium—and then observing the derivatives. If the cultured region gives rise to cell types that it would normally generate in the embryo, this means that it is specified. In contrast, determination...
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Published on: March 4, 2014

A key role for poly(ADP-ribose) polymerase 3 in ectodermal specification and neural crest development.

Michèle Rouleau1, Vishal Saxena, Amélie Rodrigue

  • 1Cancer Research Laboratory, CHUQ Research Center, Centre Hospitalier de l'Université Laval, Québec, Canada.

Plos One
|January 26, 2011
PubMed
Summary

Poly(ADP-ribose) polymerase 3 (PARP3) plays a critical role in vertebrate development. PARP3 regulates key developmental genes, impacting neural crest specification and tissue patterning in zebrafish.

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Area of Science:

  • Developmental Biology
  • Molecular Biology
  • Genetics

Background:

  • Poly(ADP-ribose) polymerase 3 (PARP3) is a member of the PARP family, structurally similar to PARP1.
  • Unlike PARP1 and PARP2, the specific functions of PARP3 have remained largely undefined.
  • This study investigates the crucial roles of PARP3 during vertebrate development.

Purpose of the Study:

  • To elucidate the functions of PARP3, particularly its potential role as a transcriptional regulator.
  • To examine the association of PARP3 with developmental genes.
  • To assess the impact of PARP3 inhibition on early zebrafish development.

Main Methods:

  • In vitro and in vivo approaches were employed.
  • PARP3 gene occupancy was analyzed in human neuroblastoma cells (SK-N-SH).
  • Zebrafish were utilized, with morpholino oligonucleotides used to inhibit parp3 expression.

Main Results:

  • PARP3 preferentially binds to developmental genes involved in cell fate, tissue patterning, craniofacial development, and neurogenesis.
  • Inhibition of PARP3 in zebrafish disrupted the expression of neural crest specifiers (sox9a, dlx3b/dlx4b).
  • PARP3 inhibition led to defects in cranial sensory placodes, inner ears, pectoral fins, pigmentation, and tail development.

Conclusions:

  • PARP3 is essential for early zebrafish development.
  • PARP3 likely functions as a transcriptional regulator during the specification of the neural plate border.