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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...
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Characterizing expression pattern of Six2Cre during mouse craniofacial development.

Meenakshi Umar1, Chunmin Dong1, Fenglei He1

  • 1Department of Cell and Molecular Biology, School of Science and Engineering, Tulane University, New Orleans, Louisiana, USA.

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|March 31, 2023
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Summary
This summary is machine-generated.

This study shows Six2Cre mouse lines are useful for investigating gene functions in craniofacial development, particularly in the frontal bone, mandible, and palate. Six2Cre lineage cells are also found to co-express with Runx2, indicating roles in osteogenesis.

Keywords:
craniofacial developmentlineage tracingmouseosteogenesispalate

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Area of Science:

  • Developmental Biology
  • Genetics
  • Craniofacial Biology

Background:

  • Craniofacial development involves complex cellular processes.
  • Transgenic Cre lines are crucial tools for studying gene function in specific tissues.
  • Understanding gene roles in craniofacial development requires precise lineage tracing tools.

Purpose of the Study:

  • To characterize the expression pattern of Six2Cre in mouse models during craniofacial development.
  • To evaluate the utility of Six2Cre for studying gene function in craniofacial tissues.
  • To identify specific craniofacial regions where Six2Cre lineage is active.

Main Methods:

  • Utilized Six2Cre transgenic mice.
  • Analyzed gene expression patterns at multiple developmental stages.
  • Employed immunostaining to detect reporter gene co-expression with specific markers like Runx2.

Main Results:

  • Six2Cre lineage cells were predominantly found in the frontal bone, mandible, and secondary palate.
  • Reporter gene expression driven by Six2Cre was co-expressed with Runx2.
  • Demonstrated Six2Cre activity in key craniofacial structures.

Conclusions:

  • Six2Cre is a valuable tool for lineage tracing in craniofacial development.
  • The Six2Cre line can be used to study gene function in palate development and osteogenesis.
  • Six2Cre expression patterns provide insights into cell populations involved in craniofacial bone formation.