Hydroxychloroquine is associated with a lower risk of polyautoimmunity: data from the RELESSER Registry.

Objectives: This article estimates the frequency of polyautoimmunity and associated factors in a large retrospective cohort of patients with SLE.

Methods: RELESSER (Spanish Society of Rheumatology Lupus Registry) is a nationwide multicentre, hospital-based registry of SLE patients. This is a cross-sectional study.

Clinical relevance of monitoring serum adalimumab levels in axial spondyloarthritis.

Our aim was to assess the relationship between serum adalimumab levels, anti-drug antibodies (ADA) and disease activity in patients with axial spondylarthritis (SpA). We have carried out a single-centre cross-sectional study. adalimumab and ADA levels were analysed with ELISA and correlated with SpA activity using BASDAI and ASDAS scores.

Obesity decreases clinical efficacy and levels of adalimumab in patients with ankylosing spondylitis.

Objectives: Obesity can be a factor that affects response to anti-TNF drugs. However, studies on patients with ankylosing spondylitis (AS) are rare. We aimed to determine whether obesity affects serum levels of adalimumab (ADL), and immunogenicity and clinical efficacy of the drug in patients with AS.

Clinical relevance of monitoring serum levels of adalimumab in patients with rheumatoid arthritis in daily practice.

Objectives: The aim of this paper is to assess the usefulness of measuring serum levels of adalimumab (ADL) and anti-ADL antibodies in 57 patients with rheumatoid arthritis (RA) treated with ADL for at least 3 months in daily practice.

Methods: All patients received concomitant disease-modifying anti-rheumatic drug (DMARD). Receiver-operator characteristics (ROC) analysis was used to obtain the cut-off value of ADL for low disease activity (DAS28-ESR ≤3.

Practical application of acid dissociation in monitoring patients treated with adalimumab.

Patients treated with adalimumab (ADL) can induce anti-ADL antibodies (AAA) formation that is associated with low drug levels and clinical non-response. But, in the majority of the assays, the measurement of AAA is hampered by the presence of the drug itself. In support of immunogenicity assessment in clinical samples with subtherapeutic ADL levels, we proved acid pre-treatment for AAA detection with the Promonitor-enzyme-linked immunosorbent assay (ELISA).

Long-term safety and efficacy of etanercept in the treatment of ankylosing spondylitis.

To date, anti-tumor necrosis factor alfa (anti-TNF-α) therapy is the only alternative to nonsteroidal anti-inflammatory drugs for the treatment of ankylosing spondylitis. Etanercept is a soluble TNF receptor, with a mode of action and pharmacokinetics different to those of antibodies and distinctive efficacy and safety. Etanercept has demonstrated efficacy in the treatment of ankylosing spondylitis, with or without radiographic sacroiliitis, and other manifestations of the disease, including peripheral arthritis, enthesitis, and psoriasis.

[Duration of treatment with etanercept and motives for discontinuation in a cohort of patients with rheumatic disease].

Objective: To evaluate the duration of etanercept (ETN) treatment and motives for discontinuation in our local cohort of patients with rheumatic pathology and compare them to the group with other biological treatments.

Patients And Methods: Prospective observational cohort study. Disease diagnosis, start and end date and motive for discontinuation were recorded.

[2011 Up-date of the consensus statement of the Spanish Society of Rheumatology on osteoporosis].

Objective: Due to increasing improvement in the diagnosis, evaluation and management of osteoporosis and the development of new tools and drugs, the Spanish Society of Rheumatology (SER) has promoted the development of recommendations based on the best evidence available. These recommendations should be a reference to rheumatologists and other health professionals involved in the treatment of patients with osteoporosis.

Methods: Recommendations were developed following a nominal group methodology and based on a systematic review.