Thioredoxin Interacting Protein Is Required for a Chronic Energy-Rich Diet to Promote Intestinal Fructose Absorption

Increased consumption of fats and added sugars has been associated with an increase in metabolic syndromes. Here we show that mice chronically fed an energy-rich diet (ERD) with high fat and moderate sucrose have enhanced the absorption of a gastrointestinal fructose load, and this required expression of the arrestin domain protein Txnip in the intestinal epithelial cells. ERD feeding induced gene and protein expression of Glut5, and this required the expression of Txnip. Furthermore, Txnip interacted with Rab11a, a small GTPase that facilitates the apical localization of Glut5. We also demonstrate that ERD promoted Txnip/Glut5 complexes in the apical intestinal epithelial cell. Our findings demonstrate that ERD facilitates fructose absorption through a Txnip-dependent mechanism in the intestinal epithelial cell, suggesting that increased fructose absorption could potentially provide a mechanism for worsening of metabolic syndromes in the setting of a chronic ERD

Preventing substance abuse in adolescents: a review of high-impact strategies.

Substance abuse has been an intractable societal concern in the US for more than half a century. The recent opioid epidemic has only accentuated this problem. Adolescents are significant long-term contributors to the crisis due to their susceptibilities to drug abuse and impressionable age. This review examines the particular vulnerabilities of the adolescent brain to drug abuse and the risk and protective factors thereof, especially in light of the Rat Park studies. In addition, the article provides an overview of the evidence-based prevention program registries and offers detailed summaries of two: Blueprints for Healthy Youth Development (Blueprints) and the Washington State Institute for Public Policy (WSIPP). By combining inputs from Blueprints and WSIPP, five programs with the highest benefit-cost ratios (BCR) were identified: Functional Family Therapy, Positive Family Support, Lifeskills Training, Positive Action, and Good Behavior Game. In light of their outstanding characteristics, these programs are poised to be widely implemented and to make a measurable difference in the fight against substance and opioid abuse