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Cell migration from the transplanted olfactory placode in Xenopus

H Koo1, P P Graziadei

  • 1Department of Biological Science, Florida State University, Tallahassee 32306-2043, USA.

Anatomy and Embryology
|February 1, 1995
PubMed
Summary

Transplanted olfactory primordia in Xenopus frogs successfully migrated along the olfactory nerve into the central nervous system (CNS). These donor cells integrated into the host CNS, suggesting potential neuronal incorporation.

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Area of Science:

  • Developmental biology
  • Neuroscience
  • Xenopus research

Background:

  • Investigating cell migration and integration into the central nervous system (CNS).
  • Understanding the potential of transplanted tissues to contribute to host neural structures.

Purpose of the Study:

  • To determine if cells from a transplanted olfactory primordium can migrate along the olfactory nerve and integrate into the host CNS in Xenopus.
  • To explore the cellular origins and potential neuronal identity of migrating cells.

Main Methods:

  • Xenopus laevis olfactory primordia were transplanted into Xenopus borealis hosts, replacing the eye vesicle.
  • Donor cells were distinguished from host cells using Xenopus borealis's fluorescent nuclear spots (Q bands).
  • Transplantation occurred at developmental stages 23/24, with subsequent observation of nerve development and cell migration.

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Main Results:

  • The transplanted olfactory anlage integrated into the host, sometimes inhibiting eye vesicle regrowth.
  • An olfactory nerve formed from the transplant and typically reached the host diencephalon.
  • Migrating cells with donor characteristics were observed along the nerve and penetrated the host CNS.

Conclusions:

  • Cells from the transplanted olfactory primordium can migrate along the olfactory nerve and become incorporated into the host Xenopus CNS.
  • Morphological evidence suggests that some of these migrating cells may be neurons, though further specific markers are needed for confirmation.