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Development, Vol 114, Issue 4 997-1001, Copyright © 1992 by Company of Biologists

JOURNAL ARTICLES

Embryonic cytoplasmic extracts rescue murine androgenones to the blastocyst stage

LJ Hagemann and NL First
Department of Scientific and Industrial Research, Palmerston North, New Zealand.

Androgenones (paternally derived genome) show a significant inability to form a blastocoele cavity. Eighty percent of these embryos die or arrest at earlier stages. Factor(s) from both normal and parthenogenetic late preimplantation embryos injected into each blastomere of androgenetic 4-cell stage can rescue more than twice as many to the blastocyst stage (47.2% versus 19.2% for non-injected androgenones). This factor(s) becomes available beginning at the 4-cell stage and is titratable. Injected total cytoplasmic mRNA will also cause a rescue response. Isolating this specific factor message(s) will permit the eventual cloning of possibly the earliest parentally imprinted gene(s) expressed during development.


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© The Company of Biologists Ltd 1992