Advances in Clinical and Experimental Medicine

Title abbreviation: Adv Clin Exp Med
JCR Impact Factor (IF) – 2.1
5-Year Impact Factor – 2.2
Scopus CiteScore – 3.4 (CiteScore Tracker 3.4)
Index Copernicus  – 161.11; MEiN – 140 pts

ISSN 1899–5276 (print)
ISSN 2451-2680 (online)
Periodicity – monthly

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Advances in Clinical and Experimental Medicine

2018, vol. 27, nr 4, April, p. 449–453

doi: 10.17219/acem/75675

Publication type: original article

Language: English

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Interleukin 6, osteoprotegerin, sRANKL and bone metabolism in inflammatory bowel diseases

Iwona Krela-Kaźmierczak1,A,B,C,D,E,F, Aleksandra Szymczak-Tomczak1,B,E, Liliana Łykowska-Szuber1,C,E, Ewa Wysocka2,B,C,E, Michał Michalak3,C,E,F, Kamila Stawczyk-Eder1,B,D, Katarzyna Waszak1,B,C, Krzysztof Linke1,E,F, Piotr Eder1,B,C,E,F

1 Department of Gastroenterology, Dietetics and Internal Medicine, Poznan University of Medical Sciences, Poland

2 Department of Laboratory Diagnostics, Poznan University of Medical Sciences, Poland

3 Department of Computer Science and Statistics, Poznan University of Medical Sciences, Poland

Abstract

Background. Cytokines are mediators of inflammatory processes in the course of inflammatory bowel disease (IBD) and participate in the bone metabolism. Interleukin 6 (IL-6) initiates osteoclastogenesis by modulating the activity of soluble receptor activator of nuclear factor kappa B ligand (sRANKL) and osteoprotegerin.
Objectives. The aim of the study was to evaluate bone mineral density (BMD) by densitometry and the concentration of interleukin 6, osteoprotegerin (OPG) and sRANKL protein (sRANKL) by ELISA in patients with IBD in relation to the control group; to assess the relationship between IL-6, OPG, sRANKL and BMD; and to assess the impact of disease duration and number hospitalization on BMD.
Material and Methods. The studied group included 37 patients with Crohn’s disease (I – CD), 37 patients with ulcerative colitis (II – UC) and 37 healthy subjects – control group (III – CG).
Results. The prevalence of osteoporosis and osteopenia was as follows: in I – CD, 18.92% and 32.43% in L2–L4; 13.51% and 35.13% in the neck, and in II – UC, 2.7% and 37.84% in L2–L4; 2.7%, and 29.73% in the femoral neck. The concentration of IL-6 correlated negatively with T-scores in the neck for the whole group, and in group I – CD, there was a significant positive correlation between serum OPG and IL-6.
Conclusion. The incidence of osteopenia and osteoporosis in patients with IBD is high and increases with the duration of the disease and the number of hospitalizations. Patients with CD are at a higher risk of skeletal pathology than patients with UC. IL-6 can modulate bone mineral density in the femoral neck especially in the course of CD.

Key words

cytokines, osteoporosis, inflammatory bowel disease

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