Impact of flexible insulin therapy on blood glucose variability, oxidative stress and inflammation in type 1 diabetic patients: The VARIAFIT study - 17/09/14
, F. Somers a, b, c, S. Lablanche a, b, c, I. Debaty a, b, c, A.L. Borel a, b, c, L. Nasse a, b, c, F. Stanke-Labesque a, b, c, P. Faure a, b, c, R. Boizel a, b, c, S. Halimi a, b, c
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Abstract |
Aims |
HbA1c only partially predicts vascular risk in patients with type 1 diabetes (T1D), and a role for blood glucose variability (BGV) is a matter of debate. For this reason, this study investigated the impact of an educational programme of flexible insulin therapy (FIT) on BGV and oxidative stress.
Methods |
Tests were conducted on 30 adult T1D patients in a prospective, single-centre trial at baseline (M0), and at 3 and 6months (M3 and M6, respectively) of the FIT programme to determine BGV, as reflected by mean amplitude of glycaemic excursions (MAGE), low blood glucose index (LBGI), lability index (LI), average daily risk range (ADRR), glycaemic lability (scored by two diabetologists), urinary leukotriene E4 (LTE4), 11-dehydro-thromboxane B2 (TXB2) and 8-iso-prostaglandin F2α (PGF2).
Results |
HbA1c (7.7±0.9%), ADRR, MAGE, LBGI and LI did not change from M0 to M3 and M6, although ADRR and LBGI significantly improved at M3 and M6 in patients with the highest baseline indices (≥ 40 and ≥ 5, respectively). TXB2 declined at M6 (832±625 vs. 633±972pg/mg; P=0.048), whereas LTE4 and PGF2 remained stable. ADRR showed the strongest correlation with glycaemic lability scores at all visits (r≥0.84, P<0.0001).
Conclusion |
A FIT educational programme improved BGV only in patients with the highest baseline variability, and led to no changes in HbA1c, while ADRR closely correlated with glycaemic lability score. Our data do not support a relationship between BGV and oxidative stress in T1D patients, although the impact of variability on TXB2 deserves further investigation (ClinicalTrials.gov NCT00973492).
Il testo completo di questo articolo è disponibile in PDF.Keywords : Flexible insulin therapy, Therapeutic education, Type 1 diabetes, Blood glucose variability, Leukotriene E4–11-dehydro-thromboxane B2
Abbreviations : FIT, BGV, MAGE, LBGI, LI, ADRR, LTE4, TXB2, PGF2
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Vol 40 - N° 4
P. 278-283 - settembre 2014 Ritorno al numero
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