title: Liquid sucrose bingeing in rats depends on the access schedule, concentration and delivery system.
abstract: Previous studies have reported binge-type consumption of solid vegetable shortening in non-food deprived rats maintained on schedules of limited shortening access. The current study determined if limited access would promote binge-type consumption of sucrose solutions. Adult male rats (6 groups, n = 10 each) were provided with one of three different sucrose concentrations (3.2%, 10%, 32% w/v) for 2 h either everyday (Daily) or Monday, Wednesday, and Friday (Intermittent). A 'binge' during the 2-h access periods was operationally defined as Intermittent intakes significantly greater than Daily intakes. Sucrose initially was provided in a 100 ml glass tube equipped with a stainless-steel drinking spout. Under these conditions, there were no differences in sucrose intake between Daily and Intermittent groups at any of the concentrations. In contrast, when sucrose was provided in a modified 60 ml plastic syringe with the same drinking spout, intakes of the Intermittent groups consuming 3.2% and 10% sucrose were greater than those of the respective Daily groups, indicating that binge-type consumption of sucrose occurred. These results demonstrate that brief, intermittent access to low and moderate concentrations of sucrose can promote binge-type behavior, and the characteristics of the drinking apparatus can affect sucrose intake.
authors.affiliation: The Pennsylvania State University, College of Health and Human Development, Nutritional Sciences Department, 126 S. Henderson, University Park, PA 16802, USA.
authors.forename: F H E
authors.initials: FH
authors.lastname: Wojnicki
authors.forename: J G
authors.initials: JG
authors.lastname: Stine
authors.forename: R L W
authors.initials: RL
authors.lastname: Corwin
mesh_terms: D000284:Administration, Oral; D000818:Animals; D002032:Bulimia / Q000503:physiopathology / Q000523:psychology*; D002755:Choice Behavior; D004195:Disease Models, Animal; D004305:Dose-Response Relationship, Drug; D004334:Drug Administration Schedule; D004435:Eating / Q000502:physiology / Q000523:psychology*; D005518:Food Preferences / Q000502:physiology / Q000523:psychology*; D008297:Male; D051381:Rats; D017207:Rats, Sprague-Dawley; D013395:Sucrose / Q000008:administration & dosage; D013549:Sweetening Agents / Q000008:administration & dosage; D013997:Time Factors
chemical_list: D013549:Sweetening Agents; D013395:Sucrose