Linked Life Data

15085729

Source:http://linkedlifedata.com/resource/pubmed/id/15085729

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
4
pubmed:dateCreated
2004-4-16
pubmed:abstractText
Maturation of porcine oocytes was examined after oocytes were cooled at the germinal vesicle stage. Cumulus-oocyte complexes (COCs) collected from medium-sized follicles were cooled at 24 degrees C or 4 degrees C for 5, 30 or 120 min in a solution with or without 1.5 M dimethylsulfoxide (DMSO). After rewarming, COCs were cultured in maturation medium at 39 degrees C, 5% CO2 in air for 44 h. Meiotic spindle organisation (by immunostaining and confocal microscopy), nuclear maturation (by orcein staining) and cytoplasmic maturation (by intracellular glutathione assay) of oocytes were examined after maturation. When COCs were cooled at 24 degrees C for various times in the medium without DMSO, a tendency to decreased spindle formation, nuclear maturation and cytoplasmic maturation was observed, but there was no statistical difference compared with controls. Addition of DMSO during cooling inhibited subsequent nuclear maturation and spindle formation. When COCs were cooled at 4 degrees C, both nuclear and cytoplasmic maturation as well as spindle formation were inhibited in most oocytes in a time-dependent manner. DMSO during cooling did not have any beneficial effect on subsequent oocyte maturation and spindle formation. These results suggest that porcine oocytes are very sensitive to a drop in the temperature before exposure to culture. Cooling oocytes before maturation inhibits their subsequent spindle organisation, nuclear and cytoplasmic maturation. Addition of DMSO to the cooling solution did not protect porcine oocytes from cooling-induced damage.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Nov
pubmed:issn
0967-1994
pubmed:author
pubmed:issnType
Print
pubmed:volume
11
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
299-305
pubmed:dateRevised
2006-11-15
pubmed:meshHeading
pubmed:year
2003
pubmed:articleTitle
Maturation of porcine oocytes after cooling at the germinal vesicle stage.
pubmed:affiliation
State Key Laboratory of Reproductive Biology, Institute of Zoology, Chinese Academy of Science, Beijing 100080, China.
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't