scispace - formally typeset
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.

Papers
More filters
Journal ArticleDOI

Sirtuin activators mimic caloric restriction and delay ageing in metazoans

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

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

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.