Associations of Leptin and Adiponectin in Irritable Bowel Syndrome Patients with Overweight and Obesity

Abstract

Irritable bowel syndrome (IBS) in overweight and obese individuals is characterized by a more severe course than in patients with normal weight. The purpose. To assess the level of adipokines (leptin and adiponectin) in blood serum, the correlation of these laboratory markers with the clinical manifestations of IBS, quality of life, eating habits, and signs of anxiety and depression based on the results of using a special questionnaire in patients with IBS. Material and methods. An open cohort cross-sectional study was conducted with the inclusion of 175 participants aged 18 to 44 years (mean age 30.06 ± 6.15 years). Group 1 included 100 obese or overweight IBS patients aged 18 to 44 years (mean age 30.63 ± 6.37 years, BMI 25.88 ± 6.28 kg/m2). In group 1, subgroup 1A included 50 people with IBS associated with overweight or obesity. In subgroup 1B – 50 people suffering from IBS, with normal weight. Group 2 included 75 people without IBS, aged 19 to 43 years (mean age 29.31 ± 5.81 years, BMI 27.80 ± 6.20 kg/m2). Subgroup 2A included 50 non-IBS participants who were overweight or obese. Subgroup 2B included 25 apparently healthy participants. IBS symptoms were assessed using a 10-point scale. Using verified questionnaires, the severity of gastrointestinal symptoms, the presence of anxiety and depression, the level of specific anxiety, quality of life and eating habits were assessed. Results. IBS patients with overweight and obesity are characterized by higher levels of leptin and low levels of adiponectin than patients with normal weight (Mann – Whitney test, p < 0.05). Adipokine levels correlate with high cravings for sweet, fatty, starchy, and salty foods. A higher concentration of leptin is characteristic of patients suffering from IBS with a predominance of constipation (Mann – Whitney test, p < 0.05). High levels of leptin and low levels of adiponectin in overweight and obese IBS patients correlate with more severe symptoms of abdominal pain, flatulence, poor quality of life, and more frequent signs of anxiety and depression (Spirmen test p < 0.05, Mann – Whitney test, p < 0.05). Conclusion. The results obtained suggest a significant role of adipokines in the formation of more severe symptoms in IBS patients with overweight and obesity compared to patients with normal weight