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Evaluation of Metabolic Control Using a Continuous Subcutaneous Glucose Monitoring System in Patients With Type 1 Diabetes Mellitus Who Achieved Insulin Independence After Islet Cell Transplantation

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This study evaluated the Medtronic MiniMed Continuous Glucose Monitoring System (CGMS) in patients with type 1 diabetes mellitus who underwent successful islet cell transplantation (ICT). The results are compared to standardized self-monitoring (SMBG) of hyperglycemia and mean amplitude of glycemic excursions (MAGE). We studied 19 patients (mean age 40.0 ± 6.7 years) in three groups: six patients post-ICT, seven patients awaiting ICT, and six normal volunteers (controls). Continuous glucose monitoring post-ICT showed remarkable glucose stability compared with patients awaiting ICT. The CGMS group showed modestly higher glucoses (mean 111.5 mg/dl) compared with controls (88 mg/dl). Postprandial glucoses in ICT recipients rarely exceeded 180 mg/dl and were similar to controls. There was no difference in asymptomatic hypoglycemia between control and post-ICT groups. However, a higher incidence of hypoglycemia was observed in patients awaiting ICT. HbA1c and MAGE pre- and post-ICT were 8.3 ± 0.9% and 6 ± 0.3% (p < 0.001) and 109 ± 34 and 41 ± 11 (p < 0.001), respectively. No complications were associated with CGMS. This study suggests ICT significantly improves metabolic control and rate of hypoglycemia when compared with controls and patients awaiting ICT. Similar improvement in metabolic control was observed with SMBG, HbA1c, and MAGE. Although CGMS was not demonstrated to be a superior tool for routine assessment in ICT, it is very helpful in special clinical situations.
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Keywords: Continuous glucose monitoring; Diabetes; Islet

Document Type: Review Article

Affiliations: 1: Diabetes Research Institute 2: Diabetes Research Institute, Department of Medicine 3: Diabetes Research Institute, Department of Surgery, University of Miami School of Medicine, Miami, FL 33136

Publication date: 2005-02-01

More about this publication?
  • Cell Transplantation publishes original, peer-reviewed research and review articles on the subject of cell transplantation and its application to human diseases. To ensure high-quality contributions from all areas of transplantation, separate section editors and editorial boards have been established. Articles deal with a wide range of topics including physiological, medical, preclinical, tissue engineering, and device-oriented aspects of transplantation of nervous system, endocrine, growth factor-secreting, bone marrow, epithelial, endothelial, and genetically engineered cells, among others. Basic clinical studies and immunological research papers are also featured. To provide complete coverage of this revolutionary field, Cell Transplantation will report on relevant technological advances, and ethical and regulatory considerations of cell transplants. Cell Transplantation is now an Open Access journal starting with volume 18 in 2009, and therefore there will be an inexpensive publication charge, which is dependent on the number of pages, in addition to the charge for color figures. This will allow work to be disseminated to a wider audience and also entitle the corresponding author to a free PDF, as well as prepublication of an unedited version of the manuscript.

    Cell Transplantation is now being published by SAGE. Please visit their website for the most recent issues.

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