Changes in Body Composition Under Ustekinumab in PsA

There is not much body composition and bone mineral density data available for patients with psoriatic arthritis (rheumatoid arthritis) compared to control subjects. The evaluation of the total fat mass and in particular of its abdominal distribution (visceral adiposity) is important because an excessive adiposity generates adverse effects on the health (hypertension, dyslipidemia, cardiovascular risk and resistance to the insulin). In addition, data on changes in body composition and bone mineral density were not available under a new psA treatment, namely ustekinumab (anti-IL12 / 23 antibody). It is proposed to conduct a pilot study to evaluate body composition, distribution (visceral adiposity) and bone mineral density in patients with psoriatic arthritis (versus control subjects) and their changes after 6 months of treatment with ustekinumab