Our results support our hypothesis that

high Se intake or status negatively impacts basal blood glucose management. Contrary to our hypothesis and previous reports demonstrating a positive effect of an HIF diet on glucose management, we found that HIF intake did not attenuate the increased fasting blood glucose that resulted from SMSC supplementation. Interestingly, although not statistically significant, there was a tendency for improved glucose tolerance in animals that were given both elevated SMSC and HIF compared with SMSC alone. Furthermore, both Se and IF have been reported to affect AMPK activation and thus cause changes in glucose management. Contrary to our original hypothesis, we did not observe a change in basal AMPK activation with SMSC supplementation, but we did observe a reduction with increased dietary IF. Selenium is an essential component of enzymes BIBF 1120 price critical to antioxidant defense. Although the precise mechanisms are not completely understood, high Se intake or status has been reported to reduce the risk of developing prostate and other cancers. However, in contrast to its chemopreventive

effects, high Se intake or status may also have a negative impact on blood glucose management. The effect that supplemental Se has on blood glucose is clearly dependent on the chemical form of Se administered [10], [13] and [22]. We supplemented mice with SMSC, an organic form of Se that Tacrolimus datasheet is abundant in foods high in Se and has a high bioavailability. Although our results contrast with those seen from increased intake of sodium selenate [10] and [11],

our findings are consistent with observational studies that have found a correlation between increased serum Se and increased incidence of type 2 diabetes [23] and [24]. Acetophenone A small increase in the risk of developing type 2 diabetes was also found after supplementation of selenomethionine in the large, randomized, controlled SELECT [14]. In addition to the results of the SELECT trial, the randomized, controlled trial reported by Stranges et al showed a significant increase in the incidence of type 2 diabetes resulting from supplementation of 200 μg Se daily in a high-Se brewer’s yeast tablet, which provides Se in multiple chemical forms [24]. However, in that study, the increased risk from Se supplementation was confined to those in the highest tertile of baseline plasma Se (>121.6 ng/mL). Those who began the study with lower plasma Se concentration experienced no increase in risk for T2D from consuming high-Se yeast. The mechanisms by which increased dietary IF improve glucose management are not clear. Cederroth et al [17] have reported that increased IF cause increased activation of AMPK in peripheral tissues. As noted above, one of the proposed mechanisms by which elevated Se negatively impacts insulin sensitivity is by reducing AMPK activation [15].