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. 1991 Mar 1;88(5):1864–1868. doi: 10.1073/pnas.88.5.1864

Antennapedia homeobox peptide regulates neural morphogenesis.

A Joliot 1, C Pernelle 1, H Deagostini-Bazin 1, A Prochiantz 1
PMCID: PMC51126  PMID: 1672046

Abstract

We synthesized the 60-amino acid polypeptide corresponding to the sequence of the Drosophila antennapedia gene homeobox. This peptide (pAntp) recognized the consensus motif for binding to the promoter region of Hox-1.3. pAntp mechanically introduced into mammalian nerve cells provoked a dramatic morphological differentiation of the neuronal cultures. Moreover, pAntp directly added to already differentiated neuronal cultures penetrated the cells and further augmented their morphological differentiation. Examination of live and fixed neurons in classical and confocal fluorescence microscopy demonstrated that pAntp was captured at all regions of the nerve cells and accumulated in the nuclei. In addition, the effect of pAntp on neurite extension was blocked in the presence of the protein synthesis inhibitor cycloheximide. Thus, our results demonstrate that neurons possess an efficient uptake system for the antennapedia homeobox peptide and suggest that binding of pAntp to consensus motifs present in nerve cell nuclei influences neuronal morphogenetic programs.

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