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Abstract:

Previous work showed that mild-heat stress induces longevity hormesis in a model organism, D. melanogaster. Here we compared the possible heat-induced hormesis in longevity of other species of Drosophila, D. buzzatii and its sibling species D. koepferae, in a single-sex environment. Possible correlations between longevity and heat-stress resistance were also tested by measuring longevity, heat-knockdown resistance and the heat-induced Hsp70 expression for each species in a common environment. D. buzzatii was longer lived than D. koepferae at benign temperature. Knockdown resistance to heat stress was positively correlated to longevity within species. However, the shorter-lived species was more resistant to knockdown by heat stress than the longer-lived species. The heat-induced Hsp70 expression was similar between species. A heat-shock treatment (37°C for 1 h at 4 days of age) extended mean longevity in the longer lived species but not in the shorter lived species. In D. koepferae, the demographic rate of senescence decreased but the baseline mortality rate increased by heat-shock, resulting in no extension of mean longevity. Sympatric populations of closely related species can be differentially sensitive to temperature and exhibit different patterns of 37°C-induced hormesis in demographic senescence and longevity. The results also show that positive correlations between stress resistance and life span within species can shift in sign across closely related species. Finally, this study shows that heat-induced hormesis in longevity can be found across different Drosophila species, as hormetic effects are not limited to the previously studied D. melanogaster. © Springer Science+Business Media, Inc. 2006.

Registro:

Documento: Artículo
Título:Heat-induced hormesis in longevity of two sibling Drosophila species
Autor:Scannapieco, A.C.; Sørensen, J.G.; Loeschcke, V.; Norry, F.M.
Filiación:Departamento de Ecología, Genética y Evolución, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Buenos Aires 1428, Argentina
Department of Ecology and Genetics, Aarhus Centre for Environmental Stress Research (ACES), University of Aarhus, Building 540, DK-8000 Aarhus C, Denmark
Palabras clave:Age-specific mortality rate; Heat-knockdown resistance; Heat-shock stress; Hormesis; Hsp70 expression; Inter-specific variation; Senescence rate; heat shock protein 70; animal experiment; article; controlled study; correlation analysis; demography; Drosophila; Drosophila melanogaster; female; heat shock; heat stress; heat tolerance; hormesis; lifespan; longevity; male; mortality; nonhuman; priority journal; protein expression; senescence; sibling; species difference; temperature; temperature sensitivity; Aging; Animals; Drosophila; Drosophila Proteins; Female; Gene Expression Regulation; Heat Stress Disorders; HSP70 Heat-Shock Proteins; Longevity; Male; Sex Characteristics; Species Specificity; Survival Analysis
Año:2007
Volumen:8
Número:3
Página de inicio:315
Página de fin:325
DOI: http://dx.doi.org/10.1007/s10522-006-9075-1
Título revista:Biogerontology
Título revista abreviado:Biogerontology
ISSN:13895729
CODEN:BIOGC
CAS:Drosophila Proteins; HSP70 Heat-Shock Proteins
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_13895729_v8_n3_p315_Scannapieco

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Citas:

---------- APA ----------
Scannapieco, A.C., Sørensen, J.G., Loeschcke, V. & Norry, F.M. (2007) . Heat-induced hormesis in longevity of two sibling Drosophila species. Biogerontology, 8(3), 315-325.
http://dx.doi.org/10.1007/s10522-006-9075-1
---------- CHICAGO ----------
Scannapieco, A.C., Sørensen, J.G., Loeschcke, V., Norry, F.M. "Heat-induced hormesis in longevity of two sibling Drosophila species" . Biogerontology 8, no. 3 (2007) : 315-325.
http://dx.doi.org/10.1007/s10522-006-9075-1
---------- MLA ----------
Scannapieco, A.C., Sørensen, J.G., Loeschcke, V., Norry, F.M. "Heat-induced hormesis in longevity of two sibling Drosophila species" . Biogerontology, vol. 8, no. 3, 2007, pp. 315-325.
http://dx.doi.org/10.1007/s10522-006-9075-1
---------- VANCOUVER ----------
Scannapieco, A.C., Sørensen, J.G., Loeschcke, V., Norry, F.M. Heat-induced hormesis in longevity of two sibling Drosophila species. Biogerontology. 2007;8(3):315-325.
http://dx.doi.org/10.1007/s10522-006-9075-1