Linked Life Data

12035979

Source:http://linkedlifedata.com/resource/pubmed/id/12035979

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
6
pubmed:dateCreated
2002-5-30
pubmed:abstractText
Hen egg yolk is widely used as a cryoprotective agent in semen freezing extenders in order to protect the spermatozoa against cold shock. The protective action of yolk is largely presumed to be due to low density lipoproteins (LDL). In recent years, arguments concerning the presence of cryoprotective antagonists in egg yolk, have reinforced interest in the use of only the LDL extracted from egg yolk in the extenders. However, current methods of LDL purification do not support the use of LDL in commercial extenders because they offer a poor recovery rate. Consequently, we have developed an easy method to extract LDL from egg yolk. Several concentrations of purified LDL (between 2.5 and 20%, w/v) were tested in freezing extenders for bull semen, and compared with commercial extenders. Our extraction method reached 97% purity and about 67% yield, and is easily reproducible on an industrial scale. Analysis of sperm motility showed that the motility and characteristics of spermatozoa movement were improved with LDL in the extender, as compared to a commercial extender containing egg yolk. The optimum LDL concentration in the extender was 8%. In conclusion, we propose that an extender containing LDL extracted from egg yolk could be used as cryoprotective media with a better efficiency than present commercial extenders.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Apr
pubmed:issn
0093-691X
pubmed:author
pubmed:issnType
Print
pubmed:day
1
pubmed:volume
57
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
1695-706
pubmed:dateRevised
2008-11-21
pubmed:meshHeading
pubmed:year
2002
pubmed:articleTitle
Low density lipoproteins extracted from hen egg yolk by an easy method: cryoprotective effect on frozen-thawed bull semen.
pubmed:affiliation
Laboratory of Biotechnology and Pathology of Reproduction, National Veterinary School of Nantes, France.
pubmed:publicationType
Journal Article