PMID: 11906906Mar 22, 2002Paper

Enhanced survivability of cloned calves derived from roscovitine-treated adult somatic cells

Biology of Reproduction
John GibbonsSteve Stice

Abstract

Nuclear transfer to produce cattle is inefficient because 1) donor cells are not easily synchronized in the proper phase of the cell cycle, 2) the nucleus of these cells is not effectively reprogrammed, 3) the rate of attrition of late-term pregnancies is high, and 4) the health of early postnatal calves is compromised. The cyclin dependent kinase 2 inhibitor, roscovitine, was used to maximize cell cycle synchrony and to produce cells that responded more reliably to nuclear reprogramming. Roscovitine-treated adult bovine granulosa cells (82.4%) were more efficiently synchronized (P < 0.05) in the quiescent G0/G1 phase of the cell cycle than were serum-starved cells (76.7%). Although blastocyst development following nuclear transfer was elevated (P < 0.05) in the serum-starved group (21.1%) relative to the roscovitine-treated cells (11.8%), the number of cells in the blastocysts derived from roscovitine-treated cells was higher (P < 0.05) than those derived from the serum-starved group (roscovitine-treated group: 142.8 +/- 6.0 cells; serum-starved group: 86.8 +/- 14.5 cells). The resulting fetal and calf survival after embryo transfer was enhanced in the roscovitine-treated group (seven surviving calves from six pregnancies) com...Continue Reading

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Citations

Sep 13, 2007·Stem Cell Reviews·Jose B CibelliPablo J Ross
Feb 3, 2007·Journal of Applied Genetics·Eduardo O MeloRodolfo Rumpf
Apr 6, 2006·Cell and Tissue Research·Guo Qing TongSoon Chye Ng
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