Abstract：
:TNF-α is one of the key proinflammatory cytokines in pathogenesis of rheumatoid arthritis (RA). TNF-α was also found to enhance synthesis of leptin. Leptin is mainly adipocyte-derived hormone controlling appetite and energy expenditure. It acts through inhibition of neuropeptide Y secretion. It is possible that TNF-α-induced leptin secretion contributes to body mass reduction in patients with RA. The study was designed to determine the influence of inactivation of the TNF-α with infliximab on plasma leptin and neuropeptide Y concentrations in patients with RA. Sixteen female patients with RA treated with infliximab and 16 healthy women were investigated. Plasma leptin and neuropeptide Y concentrations were determined before, during and after 1 year management of the patients with infliximab and were compared with body mass index and body fatty and lean mass. There was no difference in plasma leptin concentration between the rheumatoid patients before therapy and the controls (15.6 ± 1.85 and 14.5 ± 2.15 ng/ml, respectively). Neuropeptide Y concentration was higher in the patients than in the controls (54.5 ± 3.96 and 24.8 ± 2.80 pmol/l, respectively). Treatment with infliximab resulted in enhancement in leptin concentration (18.5 ± 2.34 ng/ml) and a slight increase in neuropeptide Y concentration (58.7 ± 4.66 pmol/l). Physiological relationship between leptin and body mass was shown in the patients and was not altered during the treatment. There was no significant correlation between the disease activity and plasma leptin or neuropeptide Y concentrations.
journal_name
Rheumatol Intjournal_title
Rheumatology internationalauthors
Kopec-Medrek M,Kotulska A,Widuchowska M,Adamczak M,Więcek A,Kucharz EJdoi
10.1007/s00296-011-2182-6subject
Has Abstractpub_date
2012-11-01 00:00:00pages
3383-9issue
11eissn
0172-8172issn
1437-160Xjournal_volume
32pub_type
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