Clinical immunology<br>Abnormal levels of age-elastin derived peptides in sera of diabetic patients with arterial hypertension

Asparuh Nikolov; Ivan Tsinlikov; George Nicoloff; Ivanka Tsinlikova; Alexander Blazhev; Antoan Garev

doi:10.5114/ceji.2014.45946

eISSN: 1644-4124
ISSN: 1426-3912

Central European Journal of Immunology

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3/2014
vol. 39

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abstract:

Clinical immunology
Abnormal levels of age-elastin derived peptides in sera of diabetic patients with arterial hypertension

Asparuh Nikolov

,

Ivan Tsinlikov

,

George Nicoloff

,

Ivanka Tsinlikova

,

Alexander Blazhev

,

Antoan Garev

(Centr Eur J Immunol 2014; 39 (3): 345-351)

DOI: https://doi.org/10.5114/ceji.2014.45946

Online publish date: 2014/10/14

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Introduction: An important factor in vascular wall alterations is degradation of elastic fiber major protein – elastin. As a result, elastin derived peptides (EDP) are found in circulation. Advanced glycation might also involve elastin, because it is a protein with slow metabolism. The aim of our study was to measure serum levels of glycated elastin derived peptides (AGE-EDP) of elastin in patients with type 2 diabetes mellitus (T2DM) and arterial hypertension (AH).

Material and methods: We adapted an ELISA technique for the determination of AGE-EDP. Sera of 93 patients with T2DM and AH (mean age 61.4 ±11.3 years, diabetes duration 9.88 ±3.12 years; hypertension duration 9.28 ±4.98) were tested. These values were compared to 42 age- and sex-matched controls. Diabetics were divided in two groups according to presence – Group 1 (n = 67) or absence – Group 2 (n = 26) of microangiopathy.

Results: Patients with T2DM and AH showed statistically significantly higher levels of AGE-EDP in comparison with healthy controls 0.060 (0.053÷0.065) vs. 0.039 (0.031÷0.044) (KW = 35.2; p < 0.0001). Group 1 showed significantly higher levels of AGE-EDP than the control group 0.069 (0.051÷0.070) vs. 0.039 (0.031÷0.044) (KW = 33.0; p < 0.0001). Group 2 also showed significantly higher levels of AGE-EDP than controls 0.058 (0.049÷0.064) vs. 0.039 (0.031÷0.044) (KW = 22.1;

p < 0.0001). AGE-EDP showed a correlation with an insulin dose (r = –0.28; p = 0.05), systolic blood pressure (r = 0.25; p = 0.01), BMI (r = 0.39; p = 0.01) and retinopathy (r = 0.18; p = 0.05).

Conclusions: The measurement of non-invasive markers of elastin glycation may be useful in monitoring development of vascular wall alterations and therapeutic interventions.

keywords:

Clinical immunologyAbnormal levels of age-elastin derived peptides in sera of diabetic patients with arterial hypertension

Asparuh Nikolov , Ivan Tsinlikov , George Nicoloff , Ivanka Tsinlikova , Alexander Blazhev , Antoan Garev

ELISA, elastin, AGEs, diabetic microvascular complications, arterial hypertension

Clinical immunology
Abnormal levels of age-elastin derived peptides in sera of diabetic patients with arterial hypertension

Asparuh Nikolov

,

Ivan Tsinlikov

,

George Nicoloff

,

Ivanka Tsinlikova

,

Alexander Blazhev

,

Antoan Garev