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Muscular remodeling and anteroposterior patterning during tapeworm segmentation.

Francesca Jarero1,2, Andrew Baillie1, Nick Riddiford1

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PubMed
Summary
This summary is machine-generated.

Adult tapeworm segmentation may originate in the muscular system. Positional control genes (PCGs) expressed by muscles pattern the anteroposterior (AP) axis, similar to other animals.

Keywords:
CestodaPlatyhelminthesWntanteroposterior patterninghedgehogpositional control genes

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Area of Science:

  • Developmental biology
  • Parasitology
  • Genetics

Background:

  • Tapeworms (flatworms) evolved segmentation independently, complicating comparisons with other animals.
  • Anteroposterior (AP) patterning in flatworms involves Wnt signaling and positional control genes (PCGs) in musculature.
  • Previous studies focused on larvae; this study examines adult tapeworms, specifically Hymenolepis microstoma.

Purpose of the Study:

  • Investigate PCG expression in adult Hymenolepis microstoma.
  • Understand the role of the neck region in initial segmental patterning.
  • Explore the origin of segmentation in tapeworms.

Main Methods:

  • Analysis of PCG expression patterns in adult Hymenolepis microstoma.
  • Focus on the neck region and growth zone.
  • Mapping Wnt factor expression in relation to musculature and segmentation.

Main Results:

  • Adult musculature shows new, segmental elements originating in the neck.
  • Wnt factor expression is regionalized and AP-polarized within segments, originating from muscle cells.
  • A Wnt11 paralog demarcates the neck-strobila transition.

Conclusions:

  • Tapeworm segmentation may arise from the muscular system.
  • Muscular PCG expression likely patterns the AP axis, similar to other animals.
  • This suggests conserved gene regulatory networks for body patterning.