当前位置： SCI文献检索 > PSYCHONEUROENDOCRINOLOGY期刊下所有文献 > Effects of blood glucose on delay discounting, food intake and counterregulation in lean and obese men.

Effects of blood glucose on delay discounting, food intake and counterregulation in lean and obese men.

Abstract：

BACKGROUND:Delay discounting as a measure of impulsivity has been shown to be higher in obesity with an association of increased food intake. Moreover, obese humans showed a higher wanting for high-calorie food than lean men when blood glucose concentrations were low. First studies linking blood glucose levels to delay discounting yielded mixed results. We hypothesized that obese people - in comparison to lean men - have a relative lack of energy, especially when blood glucose levels are low, that results in higher levels of delay discounting, food intake and hormonal counterregulation. METHODS:We investigated 20 lean and 20 obese healthy young men in a single-blind balanced cross-over design. With a standardized glucose clamp technique, subjects underwent a hypoglycemic state in one condition and a euglycemic state in the control condition. Regularly, blood was sampled for assessment of hormonal status, and questionnaires were filled out to assess delay discounting and symptom awareness. After normalizing blood glucose concentrations, subjects were free to eat from a standardized test buffet, followed by a snack test. RESULTS:Delay discounting was higher in obese than in lean men throughout experiments (p < 0.03). However, we did not observe significant discounting differences between glucose conditions (p > 0.1). Furthermore, the discounting performance did not correlate with food intake from the test buffet or snack test (p > 0.3). As a response to hypoglycemia, hormonal counterregulation was pronounced in both weight groups (p < 0.03), but responses of ACTH, norepinephrine and glucagon were stronger in obese compared to lean men (p < 0.03). Also, intake from the high-calorie buffet after hypoglycemia compared to euglycemia was higher in obese subjects (p < 0.02) but comparable in lean men (p > 0.5). CONCLUSIONS:Our data suggest that augmented delay discounting is a robust feature in obesity that is not linked to glucose levels or actual food intake. With our systematically controlled approach, combining performance in delay discounting with regard to distinct blood glucose levels, different weight groups, counterregulatory behavior and food intake, our results imply that delay discounting is not susceptible to fluctuations of blood glucose and do not support the assumption that a low body's energy content leads to increased impulsivity. Further replications including women and larger sample sizes are needed to corroborate our data.

journal_name

Psychoneuroendocrinology

journal_title

Psychoneuroendocrinology

authors

Klement J,Kubera B,Eggeling J,Rädel C,Wagner C,Park SQ,Peters A

doi

10.1016/j.psyneuen.2018.01.014

subject

Has Abstract

pub_date

2018-03-01 00:00:00

pages

177-184

eissn

0306-4530

issn

1873-3360

pii

S0306-4530(17)30578-4

journal_volume

pub_type

杂志文章

在线工具

Effects of blood glucose on delay discounting, food intake and counterregulation in lean and obese men.