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Review
. 2010 Jan;130(1):25-8.
doi: 10.1248/yakushi.130.25.

[Anti-aging Research Using SMP30/GNL Knockout Mice]

[Article in Japanese]
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Free article
Review

[Anti-aging Research Using SMP30/GNL Knockout Mice]

[Article in Japanese]
Akihito Ishigami. Yakugaku Zasshi. .
Free article

Abstract

Senescence Marker Protein-30 (SMP30) was originally identified as a novel protein in the rat liver, the expression of which decreases with aging. Recently, we identified SMP30 as the lactone-hydrolyzing enzyme gluconolactonases (GNL) of animal species. GNL was a key enzyme which involved in vitamin C biosynthesis, and the essential role of SMP30 in this synthetic process was verified by a nutritional study. SMP30 knockout mice developed symptoms of scurvy when fed a vitamin C-deficient diet, verifying the pivotal role of SMP30 in vitamin C biosynthesis. Moreover, SMP30 knockout mice were shorter in life span than the wild type when fed autoclaved mouse chow contained approximately 55 mg/kg of vitamin C, which we now know contains too little vitamin C to maintain normal levels of vitamin C in tissues. These results demonstrate that vitamin C deficiency shortens longevity, that is, vitamin C deficiency accelerates aging.

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