Alteration of limb and brain patterning in early mouse embryos by ultrasound-guided injection of Shh-expressing cells

Aimin Liu, Alexandra L. Joyner, Daniel H. Turnbull

Research output: Contribution to journalArticlepeer-review

93 Scopus citations

Abstract

A basic limitation of the study of development in the mouse is the inaccessibility of the embryos, which are encased in the maternal uterus. We demonstrate the first use of ultrasound backscatter microscopy for guiding injections of cells and other agents into early stage mouse embryos. Cells were injected into the mouse neural tube cavity as early as 9.5 days post coitus (E9.5), and into the developing limb buds as early as E10.5. Furthermore, a celt line engineered to express the secreted factor Sonic Hedgehog (Shh) was injected into early developing mouse brains or limbs. The Shh-expressing cells were found to induce ectopic expression of the Shh target genes Patched and Hnf3β in the dorsal brain, and to alter digit patterning in the anterior limb bud. These results show that gene misexpression studies can be performed in mouse embryos using ultrasound- guided injection of transfected cells or retroviruses. In combination with the many available mouse mutants, this method offers a new approach for analyzing genetic interactions through gain-of-function studies performed in mutant mouse backgrounds.

Original languageEnglish (US)
Pages (from-to)107-115
Number of pages9
JournalMechanisms of Development
Volume75
Issue number1-2
DOIs
StatePublished - Jul 1998

All Science Journal Classification (ASJC) codes

  • Embryology
  • Developmental Biology

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