Document Detail

Massive insulin secretion in response to anaerobic exercise in exercise-induced hyperinsulinism.
MedLine Citation:
PMID:  16308838     Owner:  NLM     Status:  MEDLINE    
Exercise-induced hyperinsulinism (EIHI) is a recently described entity characterised by recurrent episodes of hypoglycaemia induced by physical exercise. The index patient for this disorder and a matched control were subjected to aerobic and anaerobic exercise tests on a cycle ergometer. Aerobic exercise was performed at an intensity of 60% of the respective 4 mmol/l lactate threshold (40 min). Anaerobic exercise with an intensity corresponding to 130% VO2max lead to exertion within 2-3 min and elicited comparable maximal lactate levels in both subjects (10-11 mmol/l). The patient experienced a massive increase in insulin from 34 to 649 mU/l after the anaerobic test, and a lower increase in insulin from 27 to 79 mU/l during the aerobic test. Insulin concentration remained unchanged during both tests in the control. Epinephrine increased in the EIHI patient, which was probably a counterregulatory response to hypoglycaemia. The activity of lactate dehydrogenase of the index patient in isolated leukocytes as well as the response to inhibition of oxamate was normal. The hypothesis of abnormal transport or metabolism of lactate/pyruvate in the beta-cells of patients with EIHI was further supported by the parallel increase of lactate and insulin in this study elicited in particular by anaerobic exercise.
T Meissner; B Friedmann; J G Okun; M A Schwab; T Otonkoski; T Bauer; P Bärtsch; E Mayatepek
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Hormone and metabolic research = Hormon- und Stoffwechselforschung = Hormones et métabolisme     Volume:  37     ISSN:  0018-5043     ISO Abbreviation:  Horm. Metab. Res.     Publication Date:  2005 Nov 
Date Detail:
Created Date:  2005-11-25     Completed Date:  2006-01-04     Revised Date:  2009-02-19    
Medline Journal Info:
Nlm Unique ID:  0177722     Medline TA:  Horm Metab Res     Country:  Germany    
Other Details:
Languages:  eng     Pagination:  690-4     Citation Subset:  IM    
Department of General Pediatrics, University Children's Hospital, Düsseldorf, Germany.
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MeSH Terms
Hyperinsulinism / etiology*
Insulin / secretion*
L-Lactate Dehydrogenase / metabolism
Leukocytes / enzymology
Reg. No./Substance:
11061-68-0/Insulin; EC Dehydrogenase

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