title: Cognitive dysfunction associated with diabetic ketoacidosis in rats.
abstract: BACKGROUND
  Type 1 diabetes mellitus in children may be associated with neurocognitive deficits of unclear cause. A recent retrospective study in children suggested possible associations between diabetic ketoacidosis (DKA) and decreased memory. The current investigation was undertaken to determine whether cognitive deficits could be detected after a single episode of DKA in an animal model.
  
  
  METHODS
  Streptozotocin was used to induce diabetes in juvenile rats, and rats were then treated with subcutaneous insulin injections. In one group, insulin was subsequently withdrawn to allow development of DKA, which was then treated with insulin and saline. After recovery from DKA, subcutaneous insulin injections were re-started. In the diabetes control group, rats continued to receive subcutaneous insulin and underwent sham procedures identical to the DKA group. One week after recovery, cognitive function was tested using the Morris Water Maze, a procedure that requires rats to locate a hidden platform in a water pool using visual cues. During a 10 day period, mean time to locate the platform (latency) during 4 trials per day was recorded.
  
  
  RESULTS
  Comparison of latency curves demonstrated longer mean latency times on days 7 and 8 in the DKA group indicating delayed learning compared to diabetic controls.
  
  
  CONCLUSIONS
  These data demonstrate that a single DKA episode results in measurable deficits in learning in rats, consistent with findings that DKA may contribute to neurocognitive deficits in children with type 1 diabetes.
authors.affiliation: Department of Pediatrics, University of California Davis, School of Medicine, Sacramento, CA 95817, USA. nsglaser@ucdavis.edu
authors.forename: Nicole
authors.initials: N
authors.lastname: Glaser
authors.forename: Steve
authors.initials: S
authors.lastname: Anderson
authors.forename: Wesley
authors.initials: W
authors.lastname: Leong
authors.forename: Daniel
authors.initials: D
authors.lastname: Tancredi
authors.forename: Martha
authors.initials: M
authors.lastname: O'Donnell
mesh_terms: D000818:Animals; D001786:Blood Glucose / Q000032:analysis; D003072:Cognition Disorders / Q000209:etiology*; D003921:Diabetes Mellitus, Experimental / Q000150:complications / Q000503:physiopathology; D016883:Diabetic Ketoacidosis / Q000150:complications* / Q000503:physiopathology*; D007328:Insulin / Q000008:administration & dosage; D018782:Maze Learning; D008568:Memory; D011897:Random Allocation; D051381:Rats; D017207:Rats, Sprague-Dawley; D011930:Reaction Time
chemical_list: D001786:Blood Glucose; D007328:Insulin