Further delineation of the sequences required for the expression and physiological regulation of the vasopressin gene in transgenic rat hypothalamic magnocellular neurones

Janet E Davies, S. Waller, Q. Zeng, S. Wells, David Murphy*

*Corresponding author for this work

Research output: Contribution to journalArticle (Academic Journal)peer-review

20 Citations (Scopus)

Abstract

We have introduced transgenes into rats with a view to defining genomic regions that mediate the cell-specific and physiological regulation of the vasopressin gene. These transgenes consist of the rat vasopressin structural gene with a reporter inserted into exon III, flanked by different lengths of upstream and downstream sequences. 11-VCAT-3 is flanked by 11 kbp of upstream sequences and 3 kbp of downstream sequences. The previously described 5-VCAT-3 is flanked by 5 kbp of upstream and 3 kbp of downstream sequences. 3-VCAT-3 has 3 kbp of upstream and 3 kbp of downstream sequences, and 3-VCAT-0.2 is flanked by 3 kbp of upstream and 0.2 kbp of downstream sequences. All four transgenes elicit the same expression patterns; low basal expression is seen in the magnocellular supraoptic and paraventricular nuclei, and is negligible in the suprachiasmatic nucleus. Expression increases markedly in vasopressin magnocellular cells following dehydration. The sequences responsible for the cell-specific expression and physiological regulation of our transgenes thus reside within the confines of the smallest construct studied, 3-VCAT-0.2.

Original languageEnglish
Pages (from-to)42-50
Number of pages9
JournalJournal of Neuroendocrinology
Volume15
Issue number1
DOIs
Publication statusPublished - 15 Jan 2003

Keywords

  • Cell-specific expression
  • Magnocellular neurones
  • Physiological regulation
  • Transgenic rats
  • Vasopressin

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