Linked Life Data

10092122

Source:http://linkedlifedata.com/resource/pubmed/id/10092122

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
4
pubmed:dateCreated
1999-5-11
pubmed:abstractText
The developmental potential of bovine fetal germ cells was evaluated using nuclear transfer. Male and female germ cells at three stages of fetal development from 50- to 57-, 65- to 76- or 95- to 105-day-old fetuses were fused to enucleated oocytes 2 to 4 hr prior to activation with 7% ethanol (5 min) followed by 5 hr culture in 10 microg/ml cycloheximide and 5 microg/ml cytochalasin B. The in vitro development of nuclear transfer embryos derived from germ cells was compared with those derived from embryonic cells (blastomeres from day 5 or day 6 embryos). Blastocyst rate (38%) obtained with germ cells from 50- to 57-day-old fetuses tended to be higher than when using germ cells from 65- to 76- or 95- to 105-day-old fetuses (23% and 20%, respectively). Within each stage of fetal development, the proportion of blastocysts derived from male germ cells tended to be higher than that obtained with female germ cells, but due to the high variation between individual fetuses this difference was not significant. With the post activation procedure used in this study, germ cells from 50- to 57-day-old fetuses supported the development of nuclear transfer embryos to the blastocyst stage significantly (P<0.05) better than nuclei of embryonic cells (38% vs. 3%). After transfer of blastocysts derived from germ cells of 50-to 57- and 65- to 76-day fetuses, respectively, 45% (5/11) and 50% (3/6) recipients were pregnant on day 30. The corresponding pregnancy rates on day 90 were 36% (4/11) and 17%(1/6). One live male calf was delivered by cesarean section at day 277 of gestation. Our results show that nuclei of bovine fetal germ cells may successfully be reprogrammed to support full-term development of nuclear transfer embryos.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:status
MEDLINE
pubmed:month
Apr
pubmed:issn
1040-452X
pubmed:author
pubmed:issnType
Print
pubmed:volume
52
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
421-6
pubmed:dateRevised
2006-11-15
pubmed:meshHeading
pubmed:year
1999
pubmed:articleTitle
Potential of fetal germ cells for nuclear transfer in cattle.
pubmed:affiliation
Bavarian Research Center for Biology of Reproduction (BFZF), Oberschleissheim, Germany.
pubmed:publicationType
Journal Article, Comparative Study, Research Support, Non-U.S. Gov't