Linked Life Data

1953726

Source:http://linkedlifedata.com/resource/pubmed/id/1953726

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
2
pubmed:dateCreated
1991-12-2
pubmed:abstractText
For the last two decades fish antifreeze proteins have been considered to function exclusively in conferring freeze-resistance to fish by binding to ice crystals and thereby depressing blood plasma freezing points non-colligatively. We report here the discovery of a second fundamental property of antifreeze proteins, the ability to protect cells and their membranes from hypothermic damage. Experiments were carried out exposing immature bovine oocytes to 4 degrees C for 24 h in the presence of type I alanine rich alpha helical antifreeze polypeptides (AFP) from winter flounder, type II cysteine-rich AFP from sea raven or type III AFP from ocean pout. The presence of AFP in the incubation medium resulted in an approximate four fold increase in the number of oocytes retaining an intact oolemma and a three fold increase in the number of oocytes able to undergo in vitro maturation. None of the control oocytes could be fertilized, whereas, of those incubated in AFP, the percentage which developed normally following fertilization was comparable to that observed for fresh oocytes. These results indicate that cold-sensitive mammalian cells can be rendered cold-tolerant through the addition of "antifreeze" proteins.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Oct
pubmed:issn
0006-291X
pubmed:author
pubmed:issnType
Print
pubmed:day
31
pubmed:volume
180
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
566-71
pubmed:dateRevised
2006-11-15
pubmed:meshHeading
pubmed:year
1991
pubmed:articleTitle
Hypothermic protection--a fundamental property of "antifreeze" proteins.
pubmed:affiliation
Department of Mechanical Engineering, University of California, Berkeley 94720.
pubmed:publicationType
Journal Article, In Vitro, Research Support, Non-U.S. Gov't