Linked Life Data

17049582

Source:http://linkedlifedata.com/resource/pubmed/id/17049582

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
12
pubmed:dateCreated
2006-11-22
pubmed:abstractText
Calorie restriction (CR) and late-onset CR enhance longevity in many organisms. Resource allocation theory suggests that longevity is enhanced by increasing somatic storage, at the expense of current reproduction. Phytophagous insects accumulate amino acids as hemolymph storage proteins for major developmental events. We hypothesized that protein storage is involved in life extension from CR. In a longitudinal experiment, we tested whether CR altered protein storage in female grasshoppers. Individuals on CR (60 or 70% of ad libitum) or late-onset CR had at least 60% greater longevity than ad libitum individuals. Age at first oviposition, dry mass of the first clutch, or lifetime fecundity were not affected by CR, but CR did increase the number of clutches produced. Most important, females on life-extending CR and late-onset CR did not differ in the concentration of hemolymph storage of proteins in comparison to ad libitum females. Protein storage changed with time in all groups, demonstrating sufficient sensitivity in our methods. Previous experiments have shown that severe CR ( approximately 30% of ad libitum) can reduce hemolymph storage. Therefore, the reduction in intake needed to extend lifespan is not sufficient to reduce protein storage in the hemolymph. These results do not support the hypothesis that protein storage is involved in life extension from CR.
pubmed:grant
pubmed:commentsCorrections
http://linkedlifedata.com/resource/pubmed/commentcorrection/17049582-10197641, http://linkedlifedata.com/resource/pubmed/commentcorrection/17049582-10504209, http://linkedlifedata.com/resource/pubmed/commentcorrection/17049582-10876126, http://linkedlifedata.com/resource/pubmed/commentcorrection/17049582-11292875, http://linkedlifedata.com/resource/pubmed/commentcorrection/17049582-11535822, http://linkedlifedata.com/resource/pubmed/commentcorrection/17049582-11731980, http://linkedlifedata.com/resource/pubmed/commentcorrection/17049582-12489133, http://linkedlifedata.com/resource/pubmed/commentcorrection/17049582-12610293, http://linkedlifedata.com/resource/pubmed/commentcorrection/17049582-12610294, http://linkedlifedata.com/resource/pubmed/commentcorrection/17049582-14500985, http://linkedlifedata.com/resource/pubmed/commentcorrection/17049582-15044709, http://linkedlifedata.com/resource/pubmed/commentcorrection/17049582-15236760, http://linkedlifedata.com/resource/pubmed/commentcorrection/17049582-15449234, http://linkedlifedata.com/resource/pubmed/commentcorrection/17049582-16187130, http://linkedlifedata.com/resource/pubmed/commentcorrection/17049582-9014325, http://linkedlifedata.com/resource/pubmed/commentcorrection/17049582-942051
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:status
MEDLINE
pubmed:month
Dec
pubmed:issn
0047-6374
pubmed:author
pubmed:issnType
Print
pubmed:volume
127
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
883-91
pubmed:dateRevised
2010-9-16
pubmed:meshHeading
pubmed:year
2006
pubmed:articleTitle
Calorie restriction and late-onset calorie restriction extend lifespan but do not alter protein storage in female grasshoppers.
pubmed:affiliation
Department of Biology, University of North Florida, 4567 St. Johns Bluff Rd. S, Jacksonville, FL 32216, United States. jhatle@unf.edu
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't