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

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.

Associations of folate and choline metabolism gene polymorphisms with orofacial clefts.

Background: Non-syndromic isolated cleft lip with or without cleft palate (NCL/P) is a common congenital anomaly in humans, the aetiology of which is complex and associated with both genetic and environmental factors. It has been reported that maternal nutritional factors are likely to play a major role in development of NCL/P in the embryo.

Objective: As the mechanism by which folic acid and choline supplementation prevents NCL/P is poorly understood, the relationship between 16 polymorphic variants of 12 genes encoding enzymes involved in the metabolism of these two nutrients and the risk of facial clefts was investigated.