Alteration of neural tissue structure by expression of polysialic acid induced by viral delivery of PST polysialyltransferase Journal Article
| Authors: | Canger, A. K.; Rutishauser, U. |
| Article Title: | Alteration of neural tissue structure by expression of polysialic acid induced by viral delivery of PST polysialyltransferase |
| Abstract: | The expression of polysialic acid (PSA) on neural cell adhesion molecule (NCAM) is known to attenuate cell-cell interactions. During neural development the widespread expression of PSA-NCAM creates permissive conditions for the migration of neuronal and glial precursors and the guidance and targeting of axons. NCAM polysialylation can occur via either of two specific sialyltransferases, ST8SiaII (STX) and ST8SiaIV (PST), and the purpose of this study was to determine if retroviral delivery of either PST or STX could induce PSA expression in vivo and thereby alter tissue plasticity. Retroviruses expressing GFP-PST or GFP-STX were injected into embryonic retina, and development was evaluated by examining neuroepithelial structure, the expression of markers for specific cell types, cellular proliferation, and apoptosis. Chick retina was chosen because it down-regulates PSA early in its development and has a highly stereotyped program of morphogenesis. Retroviral expression of PST induced PSA expression in retina and resulted in severe but localized alterations in retinal morphogenesis, including an early disruption of radial glial cell morphology, highly disorganized retinal layers, and invasion of pigmented cells into the neural retina. In contrast, retroviral delivery of STX did not induce PSA expression or affect morphogenesis. These findings demonstrate that expression of PSA is sufficient to promote morphological alterations in a relatively nonplastic neural tissue. |
| Keywords: | controlled study; protein expression; nonhuman; cell proliferation; animal cell; animals; animal tissue; apoptosis; embryo; green fluorescent protein; animal experiment; animal model; morphogenesis; in vivo study; cell type; animalia; stem cell; gene expression regulation, developmental; eukaryota; nerve fiber; nucleotide sequence; nerve cell adhesion molecule; polysialic acid; nerve cell plasticity; sialyltransferase; sialyltransferases; cell migration; glia cell; retina; down regulation; cell interaction; nervous system development; nerve cell; cell invasion; retrovirus infection; chick embryo; chickens; nervous system; gene expression regulation, enzymologic; plasticity; neural cell adhesion molecules; nervous tissue; pigment epithelium; sialylation; attenuation; neuroepithelium; sialic acid; retina development; unidentified retrovirus; polysialyltransferase; priority journal; article; pst; stx; retina malformation |
| Journal Title: | Glycobiology |
| Volume: | 14 |
| Issue: | 1 |
| ISSN: | 0959-6658 |
| Publisher: | Oxford University Press |
| Date Published: | 2004-01-01 |
| Start Page: | 83 |
| End Page: | 93 |
| Language: | English |
| DOI: | 10.1093/glycob/cwh014 |
| PROVIDER: | scopus |
| PUBMED: | 14551221 |
| DOI/URL: | |
| Notes: | Glycobiology -- Cited By (since 1996):13 -- Export Date: 16 June 2014 -- CODEN: GLYCE -- Molecular Sequence Numbers: GENBANK: AF008194; -- Source: Scopus |
