Long-term effect of pioglitazone vs glimepiride on lipoprotein oxidation in patients with type 2 diabetes: a prospective randomized study.
Acta Diabetol
; 56(5): 505-513, 2019 May.
Article
in En
| MEDLINE
| ID: mdl-30740640
ABSTRACT
AIMS:
Type 2 diabetes (DM2) is associated to oxidative modifications of high-density lipoproteins (HDL), which can interfere with their function. Pioglitazone has proved effective in raising HDL cholesterol (HDL-C) and lowering small dense low-density lipoprotein (LDL), but no clinical studies have examined its effect on lipoprotein oxidation in patients with DM2.METHODS:
We assessed the effect of pioglitazone vs glimepiride after 1 year on HDL oxidation, expressed as relative abundance of peptides containing Met112O in ApoA-I (oxApoA-I) estimated by mass spectrometry (MALDI/TOF/TOF), in 95 patients with DM2. The oxLDL and AGE were quantified by ELISA.RESULTS:
Patients receiving pioglitazone showed a significant increase in the concentration of ApoA-I (Δ = 7.2 ± 14.8 mg/dL, p < 0.02) and a reduction in oxApoA-I (Δ = - 1.0 ± 2.6%, p < 0.02); this reduction was not significantly different from glimepiride. oxLDL showed a slight, but not significant increase in both treatment groups. Regression analysis showed a correlation between ΔoxApoA-I and ΔAGE (r = 0.30; p = 0.007) in all patients, while both of these parameters were unrelated to changes in HbA1c, HDL-C, duration of illness, or use of statins.CONCLUSIONS:
Long-term treatment with pioglitazone was effective in reducing the oxidation of HDL, but not LDL in patients with DM2, while glimepiride didn't. This finding seems to be associated to the change of glyco-oxidation status, not to any improvement in glycemic control or lipid profile. TRIAL REGISTRATION NCT00700856, ClinicalTrials.gov Registered June 18, 2008.Key words
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Sulfonylurea Compounds
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Diabetes Mellitus, Type 2
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Pioglitazone
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Hypoglycemic Agents
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Lipoproteins
Type of study:
Clinical_trials
/
Risk_factors_studies
Limits:
Aged
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Female
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Humans
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Male
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Middle aged
Language:
En
Journal:
Acta Diabetol
Journal subject:
ENDOCRINOLOGIA
Year:
2019
Document type:
Article
Affiliation country: