Belimumab use during pregnancy: a summary of birth defects and pregnancy loss from belimumab clinical trials, a pregnancy registry and postmarketing reports

Modern Management of Pregnancy in Systemic Lupus Erythematosus: From Prenatal Counseling to Postpartum Support

Systemic lupus erythematosus (SLE) is a chronic autoimmune disease that predominantly affects women of childbearing age. Pregnancy in SLE patients poses unique challenges due to the potential impact on maternal and fetal outcomes. We provide an overview of the management of SLE during pregnancy, including preconception risk stratification and counseling, treatment, and disease activity monitoring. These assessments are critical to minimize maternal and fetal adverse events in pregnant patients with SLE. Disease flares, preeclampsia, antiphospholipid syndrome complications, and maternal mortality are the major risks for a woman with SLE during gestation. Timely treatment of SLE relapse, differentiation of preeclampsia from lupus nephritis, and tailored management for antiphospholipid syndrome are essential for a successful pregnancy. Fetal outcomes include neonatal lupus (NL), preterm birth, cesarean delivery, fetal growth restriction (FGR), and small-for-gestational-age (SGA) infants. We focused on NL, linked to maternal anti-Ro/SS-A and anti-La/SS-B antibodies, which can lead to various manifestations, particularly cardiac abnormalities, in newborns. While there is a common consensus regarding the preventive effect of hydroxychloroquine, the role of echocardiographic monitoring and fluorinated steroid treatment is still debated. Finally, close postpartum monitoring and counseling for subsequent pregnancies are crucial aspects of care.

Considering belimumab during pregnancy: A more viable option over time

OBJECTIVE

To share our experience with belimumab in lupus pregnant women and to review the relevant published literature on its use in this scenario.

METHODS

A prospective observational study of pregnant patients with lupus was conducted. Additionally, MEDLINE and EMBASE databases were searched, and a secondary hand search of the literature was performed. Studies were evaluated and visualised descriptively.

RESULTS

Sixteen pregnancies of 12 lupus women were included, six (involving eight pregnancies) received belimumab throughout their illness, five of them during some period of gestation. In this group, there was one miscarriage, one elective termination and seven live foetuses (including two live twins). There was one type I intrauterine growth retardation, and a preterm pregnancy due to premature rupture of membranes (PPROM). One mild lupus flare was detected. There were no cases of pre-eclampsia, gestational diabetes mellitus or hypertension. All neonates had normal Apgar scores at birth, none needed critical care. There were no congenital anomalies. After the search, we identified 10 case reports and case series, and five registries. Among the 39 reported cases (41 pregnancies), there were 5 PPROM, 4 pre-eclampsia, and 1 eclampsia. All women made full recoveries. Nineteen new-borns had low birth weight. There were no malformations. While registries did not indicate an increased risk of birth defects or pregnancy loss, there was a higher risk of neonatal infections.

CONCLUSIONS

Belimumab may be an option for pregnant women with difficult-to-control lupus. Further research is needed to confirm the absence of association between belimumab and foetal harm.

Advances in the pharmacological management of systemic lupus erythematosus

INTRODUCTION

Despite setbacks in clinical trials for systemic lupus erythematosus (SLE), three drugs have been approved for SLE and lupus nephritis (LN) treatment in the past decade. Several ongoing clinical trials, some viewed optimistically by the scientific community, underscore the evolving landscape. Emerging clinical data have established specific therapeutic targets in routine clinical practice for treating SLE, aiming to improve long-term outcomes.

AREAS COVERED

Research related to treatment of SLE and LN is discussed, focusing on randomized clinical trials during the last 5 years and recommendations for the management of SLE published by the European Alliance of Associations for Rheumatology (EULAR), American College of Rheumatology (ACR), Asia Pacific League of Associations for Rheumatology (APLAR), and Pan-American League of Associations of Rheumatology (PANLAR).

EXPERT OPINION

The landscape of SLE and LN treatments is evolving, as new drugs and combination treatment approaches redefine the traditional concepts of induction and maintenance treatment phases. As the therapeutic armamentarium in SLE continues to expand, the research focus is shifting from the imperative for new therapies to advancing our understanding of optimal treatment selection for individual patients, steering toward precision medicine strategies.

Issues with pregnancy in systemic lupus

Systemic lupus erythematosus is a disease that affects a large number of young women of childbearing age. Today, pregnancy is considered safe in almost all women with lupus, especially when the disease is under control. However, pregnancies in this population have a higher risk of maternal complications than in the general population. It is therefore important to plan pregnancies as effectively as possible, using effective contraception and pre-pregnancy counselling. In fact, effective, well-tolerated contraception is essential for patients for whom pregnancy cannot be safely envisaged, particularly in the setting of teratogenic treatment or significant disease activity. Preconception counselling is essential and helps to anticipate several aspects of a future pregnancy. Several recent prospective studies have clearly identified risk factors for obstetric complications and disease flare. High level of lupus activity, low complement, primigravida and a history of lupus nephritis are predictive factors of disease flare when antiphospholipid syndrome or antiphospholipid antibodies (specifically for lupus anticoagulant), damage, activity of lupus are predictive for obstetric events. Appropriate therapeutic management is essential, based primarily on the continuation of hydroxychloroquine, although some recent warnings about its use in pregnancy have been discussed controversially. Corticosteroid therapy can be continued at the lowest possible dose, as can certain immunosuppressive drugs. In the case of a history of lupus nephritis, low-dose aspirin is also prescribed. Although still exceptional, the risk of neonatal lupus is also higher, in patients with anti-SSA and anti-SSB antibodies. The aim of this review is to summarise the risk factors for adverse obstetric outcomes and to improve medical and obstetric management in this population of pregnant women with lupus.

Expert Perspective on a Clinical Challenge: Lupus and Pregnancy

Systemic lupus erythematosus (SLE), a multiorgan systemic inflammatory disorder, predominantly affects women during their reproductive years. In this review, we summarize the state of knowledge about preconception planning and management of SLE during pregnancy. Achieving remission or low disease activity for several months on medications compatible with pregnancy prior to conception is essential to decreasing the risk of disease flare and improving pregnancy outcomes, including pre-eclampsia, preterm birth, and intrauterine growth restriction. With close management and well-controlled disease before and during pregnancy, <10% of patients flare. All patients with SLE should remain on hydroxychloroquine unless contraindicated. Expectant mothers with a history of antiphospholipid syndrome should be treated with anticoagulant therapy during pregnancy. Women with anti-Ro/SSA or anti-La/SSB antibodies require additional monitoring because their offspring are at increased risk for congenital heart block. Patients with SLE should be offered low-dose aspirin starting at the end of the first trimester to reduce the risk of pre-eclampsia. Flares of SLE during pregnancy require escalation of therapy. The immunosuppressives azathioprine, tacrolimus, and cyclosporine are compatible with pregnancy, and biologic agents can also be considered. Glucocorticoid use in pregnancy should be limited to the lowest effective dose. Mycophenolate mofetil/mycophenolic acid, methotrexate, leflunomide, and cyclophosphamide are known to be teratogenic and are contraindicated in pregnancy. Distinguishing a flare of lupus nephritis during pregnancy from pre-eclampsia can be particularly challenging. Overall, outcomes in pregnancy for women with lupus are improving, but gaps in knowledge about optimal management strategies persist.

A retrospective analysis of the safety of tacrolimus use and its optimal cut-off concentration during pregnancy in women with systemic lupus erythematosus: study from two Japanese tertiary referral centers

BACKGROUND

Tacrolimus is one of the major treatment options for systemic lupus erythematosus (SLE) and is considered to be a pregnancy-compatible medication. Since little is known about tacrolimus safety during pregnancy complicated by SLE, this study was designed.

METHODS

We included SLE pregnant patients who were followed up at two Japanese tertiary referral centers. We performed multivariate logistic regression analysis to assess each adverse pregnancy outcome (APO) risk. Moreover, we assessed the influence of tacrolimus on the APO ratio in pregnant patients with lupus nephritis, and the impact of combined tacrolimus-aspirin therapy on the APO ratio relative to patients exclusively administered tacrolimus.

RESULTS

Of the 124 pregnancies, 29 were exposed to tacrolimus. Multivariate analysis showed no statistical difference in APO ratio. (overall APO: adjusted odds ratio [aOR], 0.69; 95% confidence interval [CI], 0.23-2.03; p = 0.50; maternal APO: aOR, 1.17; 95% CI, 0.36-3.83; p = 0.80; neonatal APO: aOR, 1.10; 95% CI, 0.38-3.21; p = 0.86; PROMISSE APO: aOR, 0.50; 95% CI, 0.14-1.74; p = 0.27). Blood pressure and estimated glomerular filtration rate (eGFR) during pregnancy and after delivery did not differ between the two groups. Receiver operating characteristic (ROC) curve showed that tacrolimus concentration > 2.6 ng/ml was related to reduced preterm birth rate. (AUC = 0.85, 95% CI: 0.61-1.00, sensitivity: 93% and specificity: 75%). Regarding effect of tacrolimus on lupus nephritis during pregnancy, tacrolimus showed no increased risk of APO, blood pressure or eGFR during pregnancy and after delivery. (overall APO: OR, 1.00; 95% CI, 0.25-4.08; p = 0.98; maternal APO: OR 1.60, 95% CI, 0.39-6.64; p = 0.51; neonatal APO: OR, 0.71; 95% CI, 0.17-3.03; p = 0.65, PROMISSE APO: OR, 0.50; 95% CI, 0.08-3.22; p = 0.47). Tacrolimus-aspirin combination therapy showed a protective tendency against hypertensive disorders during pregnancy, preeclampsia and low birth weight.

CONCLUSIONS

Tacrolimus use during pregnancy with SLE and lupus nephritis showed no significant influence on APO, blood pressure, or renal function; therefore tacrolimus may be suitable for controlling lupus activity during pregnancy. In addition, when using tacrolimus during pregnancy, we should aim its trough concentration ≥ 2.6 ng/ml while paying careful attention to possible maternal side effects of tacrolimus.

TRIAL REGISTRATION

Retrospectively registered.

Pregnancy in systemic lupus erythematosus

Systemic lupus erythematosus (SLE) is a chronic autoimmune disease which frequently affects women of childbearing age. Nowadays, pregnancy is not contraindicated in cases of well-controlled disease activity, but pregnancies are still at higher risk of maternal and fetal complications compared to the general population. During pregnancy and puerperium patients are at risk of disease flare, and obstetric complications are more frequent in cases of active disease at conception/beginning of pregnancy, a history of lupus nephritis, and concomitant presence of antiphospholipid syndrome. To improve pregnancy outcomes in SLE patients, appropriate preconception counseling with changes in medication, if necessary, and close rheumatological and obstetrical monitoring are fundamental. This review aims to summarize the risk factors for adverse pregnancy outcomes and provide an update on developments in medical care for pregnancy in SLE patients.

[Update on pregnancy in inflammatory rheumatic diseases]

Women with rheumatic diseases should receive pre-pregnancy counselling to plan their pregnancy based on their individual risk profile. Low-dose aspirin is highly valued in the prevention of pre-eclampsia and is recommended for any lupus patient. In women with rheumatoid arthritis treated with bDMARDs, continuation during pregnancy should be considered to reduce the risk of disease relapse and adverse pregnancy outcomes. NSAIDs should be discontinued after the 20th week of pregnancy if possible. In SLE pregnancies, a lower glucocorticoid dose (6.5-10 mg/day) than previously thought is associated with preterm birth. HCQ therapy in pregnancy offers a benefit that clearly goes beyond mere disease control and should be emphasized accordingly in counselling. The use of HCQ is recommended for all SS-A-positive women from the 10th week of pregnancy at the latest, especially in the case of previous cAVB. Continuation of belimumab during pregnancy should be decided on an individual basis.Stable disease under pregnancy-compatible medication is one of the most important predictive factors for a good pregnancy outcome. Current recommendations should be considered in individual counselling.

Immunology of pregnancy and reproductive health in autoimmune rheumatic diseases. Update from the 11th International Conference on Reproduction, Pregnancy and Rheumatic Diseases

Autoimmune rheumatic diseases (ARD) can affect women and men during fertile age, therefore reproductive health is a priority issue in rheumatology. Many topics need to be considered during preconception counselling: fertility, the impact of disease-related factors on pregnancy outcomes, the influence of pregnancy on disease activity, the compatibility of medications with pregnancy and breastfeeding. Risk stratification and individualized treatment approach elaborated by a multidisciplinary team minimize the risk of adverse pregnancy outcomes (APO). Research has been focused on identifying biomarkers that can be predictive of APO. Specifically, preeclampsia and hypertensive disorders of pregnancy tend to develop more frequently in women with ARD. Placental insufficiency can lead to intrauterine growth restriction and small-for-gestational age newborns. Such APO have been shown to be associated with maternal disease activity in different ARD. Therefore, a key message to be addressed to the woman wishing for a pregnancy and to her family is that treatment with compatible drugs is the best way to ensure maternal and fetal wellbeing. An increasing number of medications have entered the management of ARD, but data about their use in pregnancy and lactation are scarce. More information is needed for most biologic drugs and their biosimilars, and for the so-called small molecules, while there is sufficient evidence to recommend the use of TNF inhibitors if needed for keeping maternal disease under control. Other issues related to the reproductive journey have emerged as "unmet needs", such as sexual dysfunction, contraception, medically assisted reproduction techniques, long-term outcome of children, and they will be addressed in this review paper. Collaborative research has been instrumental to reach current knowledge and the future will bring novel insights thanks to pregnancy registries and prospective studies that have been established in several Countries and to their joint efforts in merging data.

Society for Maternal-Fetal Medicine Consult Series #64: Systemic lupus erythematosus in pregnancy

Systemic lupus erythematosus (SLE) is a chronic, multisystem, inflammatory autoimmune disease characterized by relapses (commonly called "flares") and remission. Many organs may be involved, and although the manifestations are highly variable, the kidneys, joints, and skin are commonly affected. Immunologic abnormalities, including the production of antinuclear antibodies, are also characteristic of the disease. Maternal morbidity and mortality are substantially increased in patients with systemic lupus erythematosus, and an initial diagnosis of systemic lupus erythematosus during pregnancy is associated with increased morbidity. Common complications of systemic lupus erythematosus include nephritis, hematologic complications such as thrombocytopenia, and a variety of neurologic abnormalities. The purpose of this document is to examine potential pregnancy complications and to provide recommendations on treatment and management of systemic lupus erythematosus during pregnancy. The following are the Society for Maternal-Fetal Medicine recommendations: (1) we recommend low-dose aspirin beginning at 12 weeks of gestation until delivery in patients with systemic lupus erythematosus to decrease the occurrence of preeclampsia (GRADE 1B); (2) we recommend that all patients with systemic lupus erythematosus, other than those with quiescent disease, either continue or initiate hydroxychloroquine (HCQ) in pregnancy (GRADE 1B); (3) we suggest that for all other patients with quiescent disease activity who are not taking HCQ or other medications, it is reasonable to engage in shared decision-making regarding whether to initiate new therapy with this medication in consultation with the patient's rheumatologist (GRADE 2B); (4) we recommend that prolonged use (>48 hours) of nonsteroidal antiinflammatory drugs (NSAIDs) generally be avoided during pregnancy (GRADE 1A); (5) we recommend that COX-2 inhibitors and full-dose aspirin be avoided during pregnancy (GRADE 1B); (6) we recommend discontinuing methotrexate 1-3 months and mycophenolate mofetil/mycophenolic acid at least 6 weeks before attempting pregnancy (GRADE 1A); (7) we suggest the decision to initiate, continue, or discontinue biologics in pregnancy be made in collaboration with a rheumatologist and be individualized to the patient (GRADE 2C); (8) we suggest treatment with a combination of prophylactic unfractionated or low-molecular-weight heparin and low-dose aspirin for patients without a previous thrombotic event who meet obstetrical criteria for antiphospholipid syndrome (APS) (GRADE 2B); (9) we recommend therapeutic unfractionated or low-molecular-weight heparin for patients with a history of thrombosis and antiphospholipid (aPL) antibodies (GRADE 1B); (10) we suggest treatment with low-dose aspirin alone in patients with systemic lupus erythematosus and antiphospholipid antibodies without clinical events meeting criteria for antiphospholipid syndrome (GRADE 2C); (11) we recommend that steroids not be routinely used for the treatment of fetal heart block due to anti-Sjögren's-syndrome-related antigen A or B (anti-SSA/SSB) antibodies given their unproven benefit and the known risks for both the pregnant patient and fetus (GRADE 1C); (12) we recommend that serial fetal echocardiograms for assessment of the PR interval not be routinely performed in patients with anti-SSA/SSB antibodies outside of a clinical trial setting (GRADE 1B); (13) we recommend that patients with systemic lupus erythematosus undergo prepregnancy counseling with both maternal-fetal medicine and rheumatology specialists that includes a discussion regarding maternal and fetal risks (GRADE 1C); (14) we recommend that pregnancy be generally discouraged in patients with severe maternal risk, including patients with active nephritis; severe pulmonary, cardiac, renal, or neurologic disease; recent stroke; or pulmonary hypertension (GRADE 1C); (15) we recommend antenatal testing and serial growth scans in pregnant patients with systemic lupus erythematosus because of the increased risk of fetal growth restriction (FGR) and stillbirth (GRADE 1B); and (16) we recommend adherence to the Centers for Disease Control and Prevention medical eligibility criteria for contraceptive use in patients with systemic lupus erythematosus (GRADE 1B).