| Purpose – The purpose of this study is to explore the association of serum retinol and number of circulating
inflammatory cells and disease activity in patients with ulcerative colitis.
Design/methodology/approach – A total of 60 patients with ulcerative colitis were enrolled in a crosssectional pilot study. Patients were recruited from specialized clinic of Tabriz University of Medical Sciences,
Iran between April and August 2015. Mayo clinic index was used to assess clinical disease activity score.
Blood samples were collected. Serum retinol was assessed using HPLC to determine vitamin A status.
Complete blood count and lymphocyte phenotyping were performed by automated hematology analyzer and
flow-cytometric analysis, respectively.
Findings – According to Mayo scoring, 68.33 per cent of patients had mild and 31.66 per cent had
moderate or severe disease activity. About 43.33 per cent of patients were vitamin A deficient, with
23.33 per cent having moderate to severe deficiency (serum retinol < 20 mg/dl). Lower levels of serum
retinol and higher count and percentages of CD3þ, CD8þ T cells and neutrophil to lymphocyte ratio
were statistically associated with disease activity according to univariate analysis (p = 0.002, 0.037,
<0.001, 0.031, 0.002 and 0.039); however, in binary logistic regression, only lower levels of serum
retinol were independently associated with disease activity with a OR of 0.564 (p = 0.021; 95 per cent
CI 0.35-0.92).
Originality/value – Vitamin A deficiency was detected in this study population. Patients with moderate to
severe disease activity demonstrated lower serum retinol, higher CD8þ T cells and neutrophil to lymphocyte
ratio compared to patients with mild disease activity. |