Signal transduction pathways inactivated during periods of starvation are implicated in the regulation of longevity in organisms ranging from yeast to mammals, but the mechanisms responsible for life-span extension are poorly understood. Chronological life-span extension in S. cerevisiae cyr1 and sch9 mutants is mediated by the stress-resistance proteins Msn2/Msn4 and Rim15. Here we show that mitochondrial superoxide dismutase (Sod2) is required for survival extension in yeast. Deletion of SOD2 abolishes life-span extension in sch9Delta mutants and decreases survival in cyr1:mTn mutants. The overexpression of Sods--mitochondrial Sod2 and cytosolic CuZnSod (Sod1)--delays the age-dependent reversible inactivation of mitochondrial aconitase, a superoxide-sensitive enzyme, and extends survival by 30%. Deletion of the RAS2 gene, which functions upstream of CYR1, also doubles the mean life span by a mechanism that requires Msn2/4 and Sod2. These findings link mutations that extend chronological life span in S. cerevisiae to superoxide dismutases and suggest that the induction of other stress-resistance genes regulated by Msn2/4 and Rim15 is required for maximum longevity extension.
Download full-text PDF |
Source |
---|---|
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC1462415 | PMC |
http://dx.doi.org/10.1093/genetics/163.1.35 | DOI Listing |
Vaccines (Basel)
December 2024
Research Center for Translational Medicine, Sirius University of Science and Technology, Federal Territory Sirius, Krasnodarsky Krai, Sirius 354349, Russia.
Preventive medicine has proven its long-term effectiveness and economic feasibility. Over the last century, vaccination has saved more lives than any other medical technology. At present, preventative measures against most infectious diseases are successfully used worldwide; in addition, vaccination platforms against oncological and even autoimmune diseases are being actively developed.
View Article and Find Full Text PDFInsects
November 2024
Department of Entomology, LSU Agricultural Center, Baton Rouge, LA 70803, USA.
The Mexican rice borer, (Lepidoptera: Crambidae) is an economically important pest of sugarcane, rice, and corn in Louisiana, Texas, and Mexico. This pest is considered invasive in the US and is expanding its range northward. Due to its subtropical origin, 's northern distribution might be limited by cold tolerance.
View Article and Find Full Text PDFJ Surg Educ
December 2024
East Kent Hospitals University Foundation Trust, Kent, United Kingdom.
Objectives: Work-related injuries are common among surgeons with up to 70 % being found to report difficulties. Given the extension expected to career longevity for current trainees, injury prevention is more important than ever. However, ergonomics education for surgical trainees in the UK is deficient.
View Article and Find Full Text PDFGeroscience
December 2024
Center for Aging Biomedicine, College of Life Sciences, National & Local Joint Engineering Laboratory of Animal Peptide Drug Development, Hunan Normal University, 36 Lushan Road, Changsha, 410081, Hunan, China.
Paroxetine, a selective serotonin reuptake inhibitor, is widely used in the clinical treatment of depression. While several antidepressants show promise as geroprotectors, the role of paroxetine in aging remains unclear. In this study, we evaluated the lifespan extension effect of paroxetine in Caenorhabditis elegans (C.
View Article and Find Full Text PDFJ Med Internet Res
December 2024
Lee Kong Chian School of Medicine, Nanyang Technological University, Singapore, Singapore.
Background: Mobile health (mHealth) interventions have gained popularity in augmenting psychiatric care for adults with psychosis. Interest has grown in leveraging mHealth to empower individuals living with severe mental illness and extend continuity of care beyond the hospital to the community. However, reported outcomes have been mixed, likely attributed in part to the intervention and adopted outcomes, which affected between-study comparisons.
View Article and Find Full Text PDFEnter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!