S
Stephen L. Helfand
Researcher at Brown University
Publications - 104
Citations - 10969
Stephen L. Helfand is an academic researcher from Brown University. The author has contributed to research in topics: Drosophila melanogaster & Longevity. The author has an hindex of 47, co-authored 101 publications receiving 9887 citations. Previous affiliations of Stephen L. Helfand include University of Connecticut Health Center & Harvard University.
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Journal ArticleDOI
Sirtuin activators mimic caloric restriction and delay ageing in metazoans
Jason G. Wood,Blanka Rogina,Siva Lavu,Konrad T. Howitz,Stephen L. Helfand,Marc Tatar,David A. Sinclair +6 more
TL;DR: It is shown that resveratrol and other STACs activate sirtuins from Caenorhabditis elegans and Drosophila melanogaster, and extend the lifespan of these animals without reducing fecundity, indicating that STacs slow metazoan ageing by mechanisms that may be related to caloric restriction.
Journal ArticleDOI
Sir2 mediates longevity in the fly through a pathway related to calorie restriction
Blanka Rogina,Stephen L. Helfand +1 more
TL;DR: It is demonstrated that an increase in Drosophila Sir2 (dSir2) extends life span, whereas a decrease in dSir2 blocks the life-span-extending effect of calorie reduction or rpd3 mutations, which leads to a genetic pathway by which calorie restriction extends life spans and provides a framework for genetic and pharmacological studies of life span extension in metazoans.
Journal ArticleDOI
L1 drives IFN in senescent cells and promotes age-associated inflammation
Marco De Cecco,Takahiro Ito,Anna P. Petrashen,Amy E. Elias,Nicholas J. Skvir,Steven W. Criscione,Alberto Caligiana,Alberto Caligiana,Greta Brocculi,Greta Brocculi,Emily M. Adney,Emily M. Adney,Jef D. Boeke,Oanh Le,Christian Beauséjour,Jayakrishna Ambati,Kameshwari Ambati,Matthew Simon,Andrei Seluanov,Vera Gorbunova,P. Eline Slagboom,Stephen L. Helfand,Nicola Neretti,John M. Sedivy +23 more
TL;DR: It is proposed that the activation of retrotransposons is an important component of sterile inflammation that is a hallmark of ageing, and that L1 reverse transcriptase is a relevant target for the treatment of age-associated disorders.
Journal ArticleDOI
Extended Life-Span Conferred by Cotransporter Gene Mutations in Drosophila
TL;DR: This paper found that five independent P-element insertional mutations in a single gene resulted in a near doubling of the average adult life-span without a decline in fertility or physical activity.
Journal ArticleDOI
Recognition of myelin-associated glycoprotein by the monoclonal antibody HNK-1.
TL;DR: It is shown that a mouse monoclonal antibody, HNK-1, which is directed against human natural killer cells also recognizes an antigenic determinant of human central and peripheral nervous system white matter by immunoperoxidase staining of tissue sections.