Maternal exposure to hydroxychloroquine and birth defects

Risk Assessment and Optimization for Pregnancy in Patients with Rheumatic Diseases

Patients with rheumatic diseases frequently operate with incomplete or incorrect information while planning for and experiencing pregnancy, often due to variability in provider care and knowledge. Risk assessment at each stage of pregnancy-pre-conception, during pregnancy, and postpartum-is focused on reducing maternal and neonatal complications. This review aims to compile updated, evidence-based guidance on how to minimize risk factors contributing to adverse pregnancy outcomes (APOs). Mitigation of known causes of infertility, appropriate testing and monitoring, achieving low disease activity on pregnancy-safe disease-modifying antirheumatic drugs (DMARDs) prior to conception, controlling hypertension (a frequent comorbidity among patients with certain rheumatic diseases), and the use of appropriate adjunctive medications (such as low-dose aspirin when preeclampsia risk is high) can optimize fertility and prevent adverse maternal and neonatal outcomes.

Increased risk of congenital malformations in offspring born to women with systemic lupus erythematosus in South Korea: a nationwide population-based study

OBJECTIVES

The aim of this study was to determine the risk of congenital malformations in offspring born to women with systemic lupus erythematosus (SLE).

METHODS

This nationwide population-based study included Korean women who had a singleton pregnancy. The risk of congenital malformations in women with SLE was compared with those without SLE. Multivariable analyses were performed to estimate the OR of congenital malformations. In a sensitivity analysis, the risk of malformation was compared between the offspring of women with SLE and those of propensity-matched women without SLE.

RESULTS

Of a total of 3 279 204 pregnant women, 0.1% had SLE and their offspring had a higher frequency of congenital malformations (17.13% vs 11.99%, p<0.0001). After adjustment for age, parity, hypertension, diabetes, and fetal sex, the SLE group was found to be associated with an increased risk of congenital malformations in the nervous system (adjusted OR (aOR, 1.90; 95% CI, 1.20 to 3.03), eye, ear, face, and neck (aOR, 1.37; 95% CI, 1.09 to 1.71), circulatory system (aOR, 1.91; 95% CI, 1.67 to 2.20), and musculoskeletal system (aOR, 1.26; 95% CI, 1.05 to 1.52). Even after propensity matching, some of the tendencies were maintained.

CONCLUSIONS

This nationwide population-based study in South Korea indicates that compared with the general population, neonates born to SLE mothers have a slightly increased risk of congenital malformations affecting the nervous system, head and neck, cardiovascular system, and musculoskeletal system. When a woman with lupus becomes pregnant, careful fetal ultrasound and newborn screening can be helpful in identifying the risk of potential malformations.

Immunopathological insights into villitis of unknown etiology on the basis of transplant immunology

Villitis of unknown etiology (VUE) is an inflammatory disease characterized by the infiltration of maternal CD8 +T cells into the placental villi. Although the pathogenesis of VUE is still debated, dysregulation of the immune system appears to be an important factor in the development of the disease. Interaction of maternal T cells with the fetal antigens seems to be the trigger for the VUE onset. In this context, graft vs host disease (GVHD) and allographic rejection seem to share similarities in the VUE immunopathological mechanism, especially those related to immunoregulation. In this review, we compared the immunological characteristics of VUE with allograft rejection, and GVHD favoring a better knowledge of VUE pathogenesis that may contribute to VUE therapeutics strategies in the future.

The Potential Benefit of Hydroxychloroquine in Chronic Placental Inflammation of Unknown Etiology Associated with Adverse Pregnancy Outcomes

The placenta is the site of connection between maternal and fetal circulation, and the liaison is established early in pregnancy. A large variety of pregnancy complications such as preterm birth, fetal growth restriction, or pregnancy loss have placental expression and can be accompanied in some cases of acute or chronic identifiable placental inflamatory lesions. Chronic placental inflammatory (CPI) lesions include chronic villitis of unknow etiology (CVUE), chronic intervillositis of unknown etiology, CIUE (also described as chronic histiocytic intervillositis, CHI), and chronic deciduits. Hydroxychloroquine (HCQ) has been prescribed with good results during pregnancy to prevent adverse perinatal outcomes in maternal autoimmune conditions. Its success has paved the way to its use in CPI as CIUE/CHI; however, to date, there are no prospective, informatively designed, controlled studies on its value in these setting. This review aims to explore the potential role of HCQ in CPI of unknown etiology. Ideally, properly designed, probably multicentric studies should be undertaken to fully understand HCQ's role for prevention of adverse pregnancy outcomes after a chronic placental inflammation.

Birth outcomes in women who have taken hydroxycholoroquine in pregnancy: a prospective cohort study

OBJECTIVE

Previous small studies have been reassuring regarding the pregnancy safety of hydroxychloroquine. One recent report found an increase in major birth defects at doses ≥400 mg/day. This study was undertaken to examine pregnancy outcomes following use of hydroxychloroquine.

METHODS

Pregnant women prospectively enrolled in MotherToBaby/OTIS Pregnancy Studies exposed to hydroxychloroquine were selected. Disease-matched and healthy comparison groups without hydroxychloroquine exposure were randomly selected from the same source using a 1:1 ratio. Data were collected through interviews, medical records, and dysmorphology examinations. Outcomes were major and minor birth defects, spontaneous abortion, preterm delivery and infant growth.

RESULTS

Between 2004 and 2018, 837 pregnancies met criteria for inclusion, 279 exposed to hydroxychloroquine and 279 in each comparison group. Sixty pregnancies (7.2%) were lost-to-follow-up. Among live births, 20/232 (8.6%) with first-trimester hydroxychloroquine exposure had a major birth defect compared to 19/256 (7.4%) in the disease-matched group (Odds Ratio (OR) 1.18, 95% Confidence Interval (CI) 0.61, 2.26), and 13/239 (5.4%) in the healthy group (adjusted OR 0.76, 95% CI 0.28, 2.05). Risks did not differ at doses ≥400 mg/day. No pattern of birth defects was identified. There were no differences in rates of spontaneous abortion or preterm delivery. Growth deficiency measures did not differ in the hydroxychloroquine-exposed vs. disease-matched group, except birth head circumference (adjusted OR 1.85, 95% CI 1.07, 3.20).

CONCLUSIONS

We found no evidence of an increased risk for structural defects or other outcomes with hydroxychloroquine, with the exception of birth head circumference. For women treated with hydroxychloroquine, these findings are reassuring.