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. 1994 Oct 25;91(22):10365–10369. doi: 10.1073/pnas.91.22.10365

Disproportionate growth in mice with Igf-2 transgenes.

A Ward 1, P Bates 1, R Fisher 1, L Richardson 1, C F Graham 1
PMCID: PMC45020  PMID: 7524092

Abstract

Injection transgenesis was used to study the long-term effects of excess insulin-like growth factor II on mouse growth and differentiation. By using a construct in which the coding region of the mouse insulin like growth factor II gene (Igf-2) was placed under the control of a keratin gene promoter, four transgenic lines were established, all of which displayed overgrowth of the skin as judged by wrinkling. In addition to high levels of expression in the skin, transgene transcripts were also present in the alimentary canal and uterus. At most of the sites of transgene expression the cell number (DNA content) was greatly increased, indicating a local action of the excess insulin-like growth factor II on cell multiplication. Adult total live weight was slightly increased and there was no macroscopic evidence of tumor formation. The characteristics of these transgenic mice indicate distinct local and systemic actions for insulin-like growth factor II.

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Selected References

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