The role of NAD+ dependent histone deacetylases (sirtuins) in ageing.
Level 5 - mechanism / opinion, no new human data
Narrative review of molecular mechanisms and preclinical models with no human trial data.
PubMed 17100594 · doi:10.2174/1389450110607011553
What was done
This paper reviewed the biology and enzymatic mechanisms of class III histone deacetylases (sirtuins, SIRT1-7 in humans), their role in glucose sensing and aging pathways, and the development of drug-like small-molecule inhibitors and activators targeting these enzymes.
What was found
The abstract reports no numerical outcome data. It notes qualitatively that sirtuin overexpression extends lifespan in model organisms such as Saccharomyces cerevisiae and Caenorhabditis elegans, mirroring effects associated with calorie restriction, and describes the identification of seven human sirtuin isoforms alongside existing pharmacological modulators.
Why it matters
It outlines the basic science rationale for targeting NAD+-dependent deacetylation pathways to influence metabolic regulation and cellular aging.
Limits
As a non-systematic narrative review, it lacks a structured search protocol, meta-analytic pooling, or human clinical outcome data, relying primarily on mechanistic models and non-human organismal lifespan findings.
Cited by
- supports SIRT1 requires NAD as a co-substrate, transferring the chemical group removed from epigenetic structures to NAD during its enzymatic reaction.