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Effect of acute hyperglycaemia, long-term glycaemic control and insulin on endothelial dysfunction and inflammation in Type 1 diabetic patients with different characteristics.
MedLine Citation:
PMID:  20653749     Owner:  NLM     Status:  In-Process    
Abstract/OtherAbstract:
OBJECTIVE: To investigate the possibility of reversing endothelial dysfunction and inflammation by glucose normalization, antioxidants and insulin per se, in different subgroups of Type 1 diabetic patients.
METHODS: Three subgroups of Type 1 diabetic patients were studied: patients within 1 month of diagnosis (subgroup 1); patients with approximately 5 years' disease duration and with glycated haemoglobin (HbA(1c)) <or= 7.0% (subgroup 2) or > 7.0% since diagnosis (subgroup 3). Participants underwent four procedures: 2-h hyperglycaemic clamp followed by: (A) 12 h near-normalization of blood glucose, with the addition of vitamin C during the last 6 h; (B) 12-h vitamin C and near-normalization of blood glucose for the last 6 h; (C) both vitamin C and near-normalization of blood glucose for 12 h; (D) hyperglycaemic-hyperinsulinaemic clamp for 12 h, with the addition of vitamin C during the last 6 h.
RESULTS: After 2 h of hyperglycaemia, markers of endothelial dysfunction, nitrotyrosine, 8-iso prostaglandin F2alpha, soluble intercellular adhesion molecule-1, soluble vascular adhesion molecule-1, interleukin (IL)-6 and IL-18 were increased in all the subgroups. Levels were normalized, at all time points, by treatments A, B and C in the subgroups 1 and 2. In the third subgroup, levels were normalized only by the simultaneous normalization of blood glucose and vitamin C treatment. During treatment D, the levels were improved at 6 h in all the subgroups, but normalized at 12 h only after vitamin C in subgroups 1 and 2, but not in subgroup 3.
CONCLUSIONS: This study suggests that different subgroups of Type 1 diabetic patients react identically to acute hyperglycaemia and insulin, but differently to glucose normalization.
Authors:
A Ceriello; K Esposito; M Ihnat; J Thorpe; D Giugliano
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Diabetic medicine : a journal of the British Diabetic Association     Volume:  27     ISSN:  1464-5491     ISO Abbreviation:  Diabet. Med.     Publication Date:  2010 Aug 
Date Detail:
Created Date:  2010-07-26     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8500858     Medline TA:  Diabet Med     Country:  England    
Other Details:
Languages:  eng     Pagination:  911-7     Citation Subset:  IM    
Affiliation:
Insititut d'Investigacions Biomèdiques August Pi i Sunyer, Barcelona, Spain. aceriell@clinic.ub.es
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Comment In:
Diabet Med. 2011 Jan;28(1):125-6; author reply 127-8   [PMID:  21166857 ]

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