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Original Article: Treatment
Insulin and glucose profiles during continuous subcutaneous insulin infusion compared with injection of a long-acting insulin in Type 2 diabetes1
T. Parkner, T. Laursen*, E. T. Vestergaard, H. Hartvig, J. S. Smedegaard, T. Lauritzen and J. S. Christiansen
Department of Endocrinology and Diabetes, Aarhus University Hospital, Aarhus,  *Department of Pharmacology, University of Aarhus, Aarhus,  Clinical Department, Novo Nordisk, Bagsvaerd and  Department of General Medical Practice, University of Aarhus, Aarhus, Denmark
Correspondence to: Dr. Tina Parkner, Department of Endocrinology and Diabetes, Aarhus University Hospital, Norrebrogade 44, 8000 Aarhus C, Denmark. E-mail: tparkner@dadlnet.dk
 

1 The study has been publicized in an abstract form in Diabetes 56 (Suppl.1): A551, 2007.

Copyright Journal compilation © 2008 Diabetes UK
KEYWORDS
continuous subcutaneous insulin infusion • insulin analogues • insulin pharmacokinetics • Type 2 diabetes

Diabet. Med. 25, 585–591 (2008)

ABSTRACT

AbstractIntroductionPatients and methodsResultsDiscussionReferences

Aims  To compare insulin and glucose profiles during basal continuous subcutaneous infusion of a rapid-acting insulin analogue and once daily subcutaneous injection of a long-acting insulin analogue in Type 2 diabetes.

Methods  Twenty-one patients with Type 2 diabetes treated with oral glucose-lowering agents were randomized in this two-period crossover study to an equivalent 24-h dose of continuous subcutaneous infusion of insulin aspart and subsequently once-daily bedtime subcutaneous injection of insulin glargine, or vice versa, for eight consecutive days. Plasma profiles of insulin and glucose were recorded.

Results  On the last day of each treatment period, the area under the curve (AUC) for glucose was 10% lower on the continuous subcutaneous infusion regimen compared with the insulin injection regimen (P = 0.002). This was accomplished by a flat exogenous insulin infusion profile compared with a peaking profile with injected insulin (AUC was 74% higher after injection compared with pre-injection levels (P = 0.001)). During the last 6 days in each treatment period, the intra-subject variability of exogenous fasting insulin levels in the mornings was 41% lower during insulin infusion compared with insulin injection (P = 0.012). The corresponding intra-subject variability for fasting glucose only showed a tendency to be lower during infusion as compared to the injection regimen (28%; P = 0.104). Thirteen symptomatic-only or minor hypoglycaemic episodes were recorded during the entire infusion period compared with three episodes during the injection period.

Conclusions  Basal continuous subcutaneous infusion of a rapid-acting insulin analogue improved plasma insulin (more flat insulin profile with a lower variability) and glucose (lower AUC) profiles compared with once-daily subcutaneous injection of a long-acting insulin analogue in Type 2 diabetes.


Accepted 23 December 2007

DIGITAL OBJECT IDENTIFIER (DOI)
10.1111/j.1464-5491.2008.02418.x About DOI

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