Low sulfide levels and a high degree of cystathionine β-synthase (CBS) activation by S-adenosylmethionine (SAM) in the long-lived naked mole-rat

• Main Authors: Maja Dziegelewska, Susanne Holtze, Christiane Vole, Ulrich Wachter, Uwe Menzel, Michaela Morhart, Marco Groth, Karol Szafranski, Arne Sahm, Christoph Sponholz, Philip Dammann, Klaus Huse, Thomas Hildebrandt, Matthias Platzer
• Format: Article
• Language: English
• Published: Elsevier 2016-08-01
• Series: Redox Biology
• Subjects: Transsulfuration; Hydrogen sulfide; Methionine; Longevity; Mole-rats; Low methionine diet
• Online Access: http://www.sciencedirect.com/science/article/pii/S2213231716300088

Hydrogen sulfide (H2S) is a gaseous signalling molecule involved in many physiological and pathological processes. There is increasing evidence that H2S is implicated in aging and lifespan control in the diet-induced longevity models. However, blood sulfide concentration of naturally long-lived species is not known. Here we measured blood sulfide in the long-lived naked mole-rat and five other mammalian species considerably differing in lifespan and found a negative correlation between blood sulfide and maximum longevity residual. In addition, we show that the naked mole-rat cystathionine β-synthase (CBS), an enzyme whose activity in the liver significantly contributes to systemic sulfide levels, has lower activity in the liver and is activated to a higher degree by S-adenosylmethionine compared to other species. These results add complexity to the understanding of the role of H2S in aging and call for detailed research on naked mole-rat transsulfuration.