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Habitual physical activity is associated with circulating irisin in healthy controls but not in subjects with diabetes mellitus type 2
Author(s) -
AlDaghri Nasser M.,
Alokail Majed S.,
Rahman Shakilur,
Amer Osama E.,
AlAttas Omar S.,
Alfawaz Hanan,
Tripathi Gyanendra,
Sabico Shaun,
Chrousos George P.,
McTernan Philip G.,
Piya Milan K.
Publication year - 2015
Publication title -
european journal of clinical investigation
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.164
H-Index - 107
eISSN - 1365-2362
pISSN - 0014-2972
DOI - 10.1111/eci.12468
Subject(s) - medicine , diabetes mellitus , type 2 diabetes mellitus , endocrinology , physical activity , physical therapy
Background Irisin, a novel myokine, has been shown to increase following vigorous exercise, with studies suggesting that it mediates some of the beneficial effects of exercise. Irisin might play a role in ‘browning’ of white adipocytes, thus increasing energy expenditure. The role of irisin in exercise and energy expenditure in subjects with diabetes mellitus type 2 ( DMT 2) remains largely unknown. We aimed to investigate the association between circulating irisin and habitual physical activity in subjects with and without DMT 2. Material and methods In this cross‐sectional study, 164 Saudi adults: 81 non‐ DMT 2 controls [age: (mean ± SD ) 51·6 ± 10·9; BMI : 29·6 ± 4·3 kg/m 2 ] and 83 DMT 2 subjects [age: 54·3 ± 10·3 year; BMI : 29·4 ± 4·7 kg/m 2 ] were studied. Anthropometric and fasting serum biochemical data were collected. Circulating irisin was measured using an enzyme‐linked immunosorbent assay ( ELISA ). Frequency intensity time ( FIT ) index was used to assess the level of habitual physical activity. Results We observed significantly higher levels of irisin in DMT 2 subjects than in controls ( P < 0·001). FIT index was positively associated ( r = 0·20, P = 0·03) with circulating irisin in controls only. Additionally, irisin levels were significantly higher in tertile 3 (0·75 ± 0·07 μg/mL) than tertile 1 (0·49 ± 0·06 μg/mL) of the FIT index in healthy controls, whilst no such relation with physical activity was observed in DMT 2 subjects. Conclusion This cross‐sectional study has shown a weak association of irisin with physical activity levels in healthy controls but not in DMT 2 subjects, suggesting the possibility of discordant regulation in the condition of DMT 2.