Review
Hormone replacement and contraceptive therapy in autoimmune diseases

https://doi.org/10.1016/j.jaut.2011.11.002Get rights and content

Abstract

Sex hormones, including estrogens, influence the immune system in a complex manner, playing an important role in the pathophysiology of autoimmune diseases. Estrogen receptors can be found in almost all cells, including those of the adaptive and innate immune systems. Depending on the relative preponderance and stimulation of different receptors in various tissues, estrogens may demonstrate pro-inflammatory or anti-inflammatory properties. Traditionally, exogenous estrogens were considered to have the potential of worsening the autoimmune processes and hence were avoided in patients with rheumatic diseases. Recent studies have demonstrated the efficacy of exogenous hormone therapies, either in the form of oral contraceptives or post-menopausal hormonal replacement therapy, in the majority of patients with rheumatic diseases. However, caution needs to be exercised as a higher incidence of mild to moderate flares of systemic lupus erythematosus was noted with hormonal replacement therapy in the large randomized controlled trial, HRT-SELENA. Exogenous estrogens can also increase the risk of thrombosis in patients with positive antiphospholipid antibodies and should be avoided in this subgroup. This review will discuss the current evidence on the efficacy, safety and impact of exogenous sex hormone therapies in patients with autoimmune rheumatic diseases.

Highlights

► The sex hormones play a significant role in the pathophysiology of autoimmune rheumatic diseases. ► Hormonal therapies (OCs and HRT) are effective in the majority of patients with rheumatic diseases. ► However, their use should be avoided in women with severe active SLE and hypercoaguable states. ► HRT led to an increase in mild to moderate SLE flares in the HRT-SELENA trial. ► OCs may improve RA disease activity and are an effective and safe option for young women with RA.

Section snippets

Estrogens and systemic lupus erythematosus

The major concerns over use of estrogens in systemic lupus erythematosus (SLE) were induction or exacerbation of the disease. Animal data have shown harmful effects of estrogens in SLE models. Estrogens augment murine B-cell survival and autoreactivity and exacerbate murine SLE in some models. However, the effects of estrogens on murine disease are variable [1]. In the NZB/NZW murine SLE model, removal of estrogen or addition of androgen improves survival [2]. In contrast, estrogen has diverse

Estrogens and rheumatoid arthritis

In animal models of arthritis, estrogens have beneficial effects, retarding arthritis progression [60], [61]. In human rheumatoid arthritis, the role of estrogens is less clear as both pro- and anti-inflammatory effects have been reported. Rheumatoid arthritis is two to three times more common in women compared to men. Higher disease activity scores have been reported in women compared to men [62]. On the other hand, rheumatoid arthritis tends to improve during periods of high estrogen levels,

Other autoimmune diseases

The evidence for any beneficial or harmful role for estrogens and other sex hormones is very limited and sometimes contradictory for other autoimmune diseases. Two studies suggested beneficial role of exogenous estrogens (including hormone replacement therapy) on endothelial function in patients with systemic sclerosis [82], [83]. In contrast, one case report described progression of Raynaud’s phenomena to severe systemic sclerosis after use of OCs [84]. Behcet’s disease is associated with

Conclusion

The autoimmune rheumatic diseases affect young women, especially SLE. The pathophysiology of these diseases is complex and sex hormones may have variable effects. Care should be exercised in using hormone replacement therapy in SLE given the increased risk of mild to moderate flare. OCs cannot be recommended for women with SLE with hypercoagulability. Women with active and severe SLE, history of thrombosis, anticardiolipin antibody and/or lupus anticoagulant positivity are at high risk and

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