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Noninvasive Intravascular Microtransfusion in Colonial Tunicates.

Lluìs Albert Matas Serrato1, Alessandro Bilella1, Simon Blanchoud2

  • 1Department of Biology, University of Fribourg, Fribourg, Switzerland.

Methods in Molecular Biology (Clifton, N.J.)
|April 1, 2022
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Summary

Researchers developed a microtransfusion technique to study whole-body regeneration (WBR) in tunicates. This method allows for the isolation, analysis, and manipulation of hemocytes, crucial for understanding WBR in these marine invertebrates.

Keywords:
BotrylloidesColonial ascidiansHemolymphTransfusionTunicates

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Area of Science:

  • Marine Biology
  • Regenerative Medicine
  • Invertebrate Zoology

Background:

  • Tunicates are marine invertebrates and the closest relatives to vertebrates.
  • Colonial tunicates exhibit remarkable whole-body regeneration (WBR), regenerating a whole organism from small fragments.
  • This regeneration is thought to involve circulating stem cells (hemocytes).

Purpose of the Study:

  • To develop a method for isolating, analyzing, and manipulating hemocytes in regenerating colonial tunicates.
  • To facilitate the study of the cellular mechanisms underlying whole-body regeneration (WBR).

Main Methods:

  • A novel microtransfusion technique was developed for hemolymph collection and hemocyte isolation.
  • Protocols for hemocyte purity quantification, labeling, and reinjection were established.
  • Flow cytometry was utilized for hemocyte analysis.

Main Results:

  • The microtransfusion technique allows for the collection of pure hemocytes from colonial tunicates.
  • The method enables labeling and reinjection of hemocytes into the same colony.
  • The technique is minimally invasive, non-lethal, and permits repeated transfusions.

Conclusions:

  • The presented microtransfusion technique is a valuable tool for studying hemocytes and WBR in colonial tunicates.
  • This method supports in-depth investigation into the role of hemocytes in regeneration.
  • The approach offers a minimally disruptive way to manipulate and analyze cellular components critical for regeneration.