Effects of long-term disease-modifying antirheumatic drugs on endothelial function in patients with early rheumatoid arthritis

Vascular function and morphology in rheumatoid arthritis: a systematic review

OBJECTIVES

RA associates with significantly increased morbidity and mortality from cardiovascular disease (CVD). This may be due to complex interactions between traditional CVD risk factors, systemic rheumatoid inflammation and the vasculature. We reviewed the current literature to answer: (i) whether there is sufficient evidence that patients with RA have altered vascular function and morphology compared with normal controls; (ii) whether there is sufficient evidence to determine if such changes relate predominantly to systemic inflammation; and (iii) whether any changes of vascular function and morphology in RA can be modified with therapy.

METHODS

The MEDLINE database was searched to identify publications from 1974 to 1 November 2010 pertaining to vascular function and morphology in RA. The total number of articles included in the present review was 93. This included 57 cross-sectional studies, 27 longitudinal studies without randomization and 9 longitudinal studies with randomization.

RESULTS

Vascular function and morphology was impaired in RA relative to healthy controls. The majority of studies reported no associations between systemic inflammation and vascular function. Treatment with anti-inflammatory medication resulted in both transient and long-term improvements in the vasculature, but only a few studies reported associations between change in inflammation and change in vascular function and morphology.

CONCLUSION

The link between systemic inflammation and vascular function and morphology is not wholly supported by the available literature. Long-term studies examining specific predictors (including CVD risk factors) on the vasculature in RA are needed.

Role of cardiovascular imaging in systemic autoimmune diseases

Systemic autoimmune diseases are characterized by an excess of cardiovascular (CV) morbidity and mortality compared to the general population, mainly due to chronic inflammation that promotes the development of endothelial dysfunction and enhanced atherosclerosis. Early diagnosis of silent CV involvement is mandatory to improve the long term prognosis of these patients and CV imaging provides valuable information as a reliable diagnostic tool. Transthoracic echocardiography, with several applications (e.g. coronary flow reserve evaluation, tissue Doppler imaging, speckle tracking and the transesophageal approach), represents a first line evaluation, in association with biomarkers of endothelial dysfunction, such as asymmetric dimethylarginine. Nuclear medicine provides useful information on myocardial perfusion. The aim of this editorial is to provide a brief but complete review of the diagnostic tools available for screening and follow up of CV involvement in systemic autoimmune diseases.

The effect of pharmacological therapy on the cardiovascular system of patients with systemic rheumatic diseases

The higher mortality rate among rheumatoid arthritis (RA) patients in comparison with the general population is largely attributable to cardiovascular (CV) disease, particularly coronary atherosclerosis, but also non-fatal myocardial infarction and heart failure. It may be due to RA-specific risk factors such as hyperhomocysteinemia, disease-related dyslipidemia or vascular inflammation, or morbidity related to high levels of cytokines such as tumour necrosis factor (TNF) and RA medications. Non-steroidal anti-inflammatory drugs (NSAIDs) are among the most important in rheumatology, but many are associated with CV disease. A number of randomised control trials have shown that, although exposure to low doses of corticosteroids for 1-3years does not significantly increase CV risk, longer exposure can increase CV events. The use of disease-modifying antirheumatic drugs (DMARDs), particularly methotrexate, increases homocysteinemia, reduces inflammation and improves lipid profiles, thus reducing the development of atherosclerosis and clinically overt CVD. Although contraindicated in RA patients with severe heart failure, biological agents such as anti-TNF agents delay and even reverse the progression of endothelial dysfunction and atherosclerosis. Tocilizumab leads to changes in lipid profiles without increasing adverse vascular events. The effects on the CV system depend on the drug itself, the dose and the period of exposure, and so CV risk should be evaluated before starting treatment with any drug.