Expression of exogenous DNA during the early development of the chick embryo. 

Margaret Perry, Simon Hettle, David Morrice, Helen Slang

Research output: Contribution to journalArticle

Abstract

A plasmid construct containing the reporter gene,lacZ, under the control of the cytomegalovirus immediate early promoter, was injected into the germinal disc of fertilised chick ova. The distribution of cells expressing β-galactosidase was examined in the embryos after periods of from 3 h to 7 days in culture. β-galacto-sidase-positive cells were first observed at mid-cleavage (250–500 closed cells) in the centre of the blastodisc. After one day, they were prominent in large segments of the blastoderm and, at later stages, in proportionately smaller segments of the extra-embryonic membranes, notably in the endodermal layer. In the embryonic regions, positive cells were scattered in the vicinity of the primitive streak of most cultures, but after gastrulation they were present in the embryonic tissue of only 7% of surviving embryos. The results provide supportive evidence for transcriptional activity during the cleavage stages of avian development. They also confirm previous findings on the loss of exogenous DNA during the early development of the chick.
Original languageEnglish
Pages (from-to)312-319
Number of pages8
JournalRoux's Archiv. Dev. Biol
Volume200
Issue number6
DOIs
Publication statusPublished - 1991
Externally publishedYes

Fingerprint

Chick Embryo
Blastodisc
DNA
Embryonic Structures
Primitive Streak
Galactosidases
Blastoderm
Extraembryonic Membranes
Gastrulation
Zygote
Cytomegalovirus
Reporter Genes
Plasmids

Keywords

  • Chick embryos
  • DNA injection
  • B-galactosidase expression
  • Viral promoter

Cite this

Perry, Margaret ; Hettle, Simon ; Morrice, David ; Slang, Helen. / Expression of exogenous DNA during the early development of the chick embryo. . In: Roux's Archiv. Dev. Biol. 1991 ; Vol. 200, No. 6. pp. 312-319.
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Expression of exogenous DNA during the early development of the chick embryo. . / Perry, Margaret; Hettle, Simon; Morrice, David; Slang, Helen.

In: Roux's Archiv. Dev. Biol, Vol. 200, No. 6, 1991, p. 312-319.

Research output: Contribution to journalArticle

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AU - Perry, Margaret

AU - Hettle, Simon

AU - Morrice, David

AU - Slang, Helen

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AB - A plasmid construct containing the reporter gene,lacZ, under the control of the cytomegalovirus immediate early promoter, was injected into the germinal disc of fertilised chick ova. The distribution of cells expressing β-galactosidase was examined in the embryos after periods of from 3 h to 7 days in culture. β-galacto-sidase-positive cells were first observed at mid-cleavage (250–500 closed cells) in the centre of the blastodisc. After one day, they were prominent in large segments of the blastoderm and, at later stages, in proportionately smaller segments of the extra-embryonic membranes, notably in the endodermal layer. In the embryonic regions, positive cells were scattered in the vicinity of the primitive streak of most cultures, but after gastrulation they were present in the embryonic tissue of only 7% of surviving embryos. The results provide supportive evidence for transcriptional activity during the cleavage stages of avian development. They also confirm previous findings on the loss of exogenous DNA during the early development of the chick.

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