NAMPT= Nikotinamidifosforibosyylitransferaasi
https://www.ncbi.nlm.nih.gov/pubmed/29721988
Adv Exp Med Biol. 2018;1074:561-567. doi: 10.1007/978-3-319-75402-4_68.
Role of Sirtuins in Retinal Function Under Basal Conditions.
Abstract
Sirtuins are NAD+-dependent
enzymes that govern cellular homeostasis by regulating the acylation
status of their diverse target proteins. We recently demonstrated that
both rod and cone photoreceptors rely on NAMPT-mediated NAD+ biosynthesis to meet their energetic requirements. Moreover, we found that this NAD+-dependent retinal homeostasis relies, in part, on maintenance of optimal activity of the mitochondrial sirtuins
and of SIRT3 in particular. Nonetheless, it is unknown whether other
sirtuin family members also play important roles in retinal homeostasis.
Our results suggest that SIRT1, SIRT2, SIRT4, and SIRT6 are dispensable
for retinal survival at baseline, as individual deletion of each of
these sirtuins
does not cause retinal degeneration by fundus biomicroscopy or retinal
dysfunction by ERG. These findings have significant implications and
inform future studies investigating the mechanisms underlying the
central role of NAD+ biosynthesis in retinal survival and function.
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