Circulating dipeptidyl peptidase-4 activity is associated with diabetic retinopathy in type 1 diabetic patients

Scientific paper - Original scientific paper

• Author: Kristina Blaslov
• Author: Tomislav Bulum
• Author: Lea Duvnjak
• Author's institution: University of Zagreb; School of Medicine
• Scientific / art field, discipline and subdiscipline: BIOMEDICINE AND HEALTHCARE; Clinical Medical Sciences

Abstract (english)

PURPOSE:

Diabetic retinopathy (DR) is the most frequent complication among patients with type 1 diabetes mellitus (T1DM). Dipeptidyl peptidase-4 (DPP4) is a protease with elevated activity in patients with T1DM. Several studies indicate that DPP4 inhibitors might have beneficial effect on nonproliferative retinopathy (NPR) development as well as on its progression to proliferative retinopathy (PR). We aimed to explore the relationship between serum DPP4 activity and DR in patients with T1DM. -----

METHODS:

This cross-sectional study recruited 44 patients with T1DM. The DPP4 activity was measured by colorimetric assay in a microplate reader. Photodocumented retinopathy status was made according to the EURODIAB protocol. -----

RESULTS:

A total of 28 (63.6%) patients were men, mean age 45.36 years, diabetes duration 23.71 years, glycated hemoglobin A1c (HbA1c) 7.4%. Patients were stratified into 2 groups according to retinopathy prevalence. Group 1 comprised 14 (31.85%) patients with DR absence while the second group consisted of 30 (68.15%) patients with both PR and NPR. Group 1 had lower fasting serum DPP4 activity (25.85 vs 33.84 U/L, p<0.001) when compared to the second group. In the binary logistic regression model adjusted for age, sex, diabetes duration, and HbA1c level, DPP4 activity was associated with DR prevalence (odds ratio 1.887 [1.073-3.321]). -----

CONCLUSIONS:

Serum DPP4 activity may be independently associated with both DR types in patients with T1DM. Further study is warranted to elucidate whether there is an association between DPP4 activity and DR severity and/or progression.

• Keywords (english): Adult; Blood Glucose/metabolism; Colorimetry; Cross-Sectional Studies; Diabetes Mellitus, Type 1/enzymology; Diabetic Retinopathy/enzymology; Dipeptidyl Peptidase 4/blood; Female; Hemoglobin A, Glycosylated/metabolism; Humans; Male; Middle Aged; Risk Factors
• Language: english
• Publication type: Scientific paper - Original scientific paper
• Publication status: Published
• Peer review: Peer review
• Publication version: Accepted version
• Journal title: European Journal of Ophthalmology
• Numbering: vol. 25, no. 4, pp. 328-332
• p-ISSN: 1120-6721
• DOI: https://doi.org/10.5301/ejo.5000547
• URN:NBN: urn:nbn:hr:105:371705
• Publication: 2015-07
• Document URL: https://doi.org/10.5301/ejo.5000547
• Type of resource: Text
• Access conditions: Open access
• Created on: 2024-03-28 08:54:03