Management of the pregnant inflammatory bowel disease patient on anti-tumour necrosis factor: state of the art and future directions

Case report: A pregnant woman with Crohn disease who used ustekinumab to the 3rd trimester developed severe infection

RATIONALE

Crohn disease (CD) and pregnancy often impact each other, which poses challenges for women with CD to successfully give birth to a healthy baby. The latest guideline recommends that patients with active inflammatory bowel disease delay pregnancy to induce remission and optimize disease control. Research data has showed that the incidence of infection and severe infection in patients treated with ustekinumab (UST) did not increase compared to those treated with a placebo.

PATIENT CONCERNS

This report describes the entire process of a pregnant woman with CD who has undergone ileostomy and long-term enteral nutrition and requires biological agents to control the disease, from conception to delivery. This case was pregnant during CD period and regularly treated with UST to the third trimester, with the onset of sepsis and septic shock at 38 weeks gestation.

DIAGNOSES

The patient was pathologically diagnosed with CD 16 years ago and admitted to our department at 38 weeks gestation.

INTERVENTIONS

After admission to our department, fetal heart monitoring indicated fetal distress, so we immediately terminated the pregnancy by cesarean section. After the diagnosis of septic shock, the patient was transferred to intensive care unit for active anti-infection and symptomatic supportive treatment.

OUTCOMES

The mother only experienced an infection in the third trimester, and cured by active treatment. The newborn was delivered at full term and confirmed to be low birth weight.

LESSONS

Her experience suggests that although pregnant during Crohn active period, a good outcome can be achieved through positively controlling with medication and closely monitoring it. The use of UST during pregnancy appears to be safe for both the mother and fetus but may be associated with severe infections.

Immune function in newborns with in-utero exposure to anti-TNFα therapy

BACKGROUND AND AIM

Anti-TNFα is measurable in infants exposed in utero up to 12 months of age. Data about the exposure effect on the infant's adaptive immunity are limited. We aimed to prospectively evaluate the distribution and function of T and B cells, in infants of females with inflammatory bowel disease, in utero exposed to anti-TNFα or azathioprine.

METHODS

A prospective multi-center study conducted 2014-2017. Anti-TNFα levels were measured in cord blood, and at 3 and 12 months. T-cell repertoire and function were analyzed at 3 and 12 months by flow-cytometry, expression of diverse T cell receptors (TCR) and T-cell receptor excision circles (TREC) quantification assay. Serum immunoglobulins and antibodies for inactivated vaccines were measured at 12 months. Baseline clinical data were retrieved, and 2-monthly telephonic interviews were performed regarding child infections and growth.

RESULTS

24 pregnant females, age 30.6 (IQR 26.5-34.5) years were recruited, 20 with anti-TNFα (infliximab 8, adalimumab 12), and 4 with azathioprine treatment. Cord blood anti-TNFα was higher than maternal blood levels [4.3 (IQR 2.3-9.2) vs. 2.5 (IQR 1.3-9.7) mcg/ml], declining at 3 and 12 months. All infants had normal number of B-cells (n = 17), adequate levels of immunoglobulins (n = 14), and protecting antibody levels to Tetanus, Diphtheria, Hemophilus influenza-B and hepatitis B (n = 17). All had normal CD4+, CD8+ T-cells, and TREC numbers. TCR repertoire was polyclonal in 18/20 and slightly skewed in 2/20 infants. No serious infections requiring hospitalization were recorded.

CONCLUSION

We found that T-cell and B-cell immunity is fully mature and immune function is normal in infants exposed in utero to anti-TNFα, as in those exposed to azathioprine. Untreated controls and large-scale studies are needed to confirm these results.

Therapeutic challenges in the treatment of systemic inflammatory disease in pregnancy

Background

Granulomatosis with polyangiitis and Behçet’s disease can occur during pregnancy and may be treated by ophthalmologists, rheumatologists, and obstetricians. We hypothesized that specialty training would affect the way physicians selected therapy.

Methods

Using an online questionnaire, 209 uveitis specialists, 853 rheumatologists, and 2500 obstetricians were surveyed. Respondents were given clinical vignettes containing a female patient who was contemplating pregnancy or in the first trimester and was diagnosed with granulomatosis with polyangiitis or Behçet’s disease.

Results

In the patient with granulomatosis with polyangiitis, therapy choice between specialties for biologic versus non-biologic systemic immunosuppressive medications was significantly different for both the non-pregnant and pregnant patient (p < 0.00001, p < 0.00003). In the non-pregnant patient diagnosed with Behçet’s disease, the therapy choice between biologic versus non-biologic medications was also significantly different (p < 0.0003).

Conclusions

Specialty training affects how physicians manage granulomatosis with polyangiitis and Behçet’s disease. Development of inter-specialty guidelines and treatment plans may improve outcomes, communication, and patient care.

Vedolizumab exposure in pregnancy: outcomes from clinical studies in inflammatory bowel disease

BACKGROUND

Vedolizumab is a gut-selective immunoglobulin G₁ monoclonal antibody to α₄ β₇ integrin for the treatment of Crohn's disease (CD) and ulcerative colitis (UC). Prospective clinical studies of vedolizumab in pregnancy have not been conducted; therefore, existing safety data of vedolizumab in pregnancy were examined.

AIM

To assess pregnancy outcomes in females and partners of males who received vedolizumab.

METHODS

All pregnancy data collected during the clinical programme (from 14 May 2007 to 27 June 2013) and in the post-marketing setting (to 19 November 2015) were analysed.

RESULTS

Across six studies, there were 27 pregnancies in female participants and 19 pregnancies in partners of male participants. Among 24 vedolizumab-treated females (23 with CD/UC, one healthy volunteer), there were 11 live births, five elective terminations, four spontaneous abortions and four undocumented outcomes. A congenital corpus callosum agenesis anomaly was reported in one live birth from a healthy volunteer with extensive obstetric history exposed to single-dose vedolizumab 79 days before estimated conception. Of 19 pregnancies in partners of male participants, there were 11 live births, two spontaneous abortions, three elective terminations and three undocumented outcomes. Post-marketing reports recorded 81 pregnancies, resulting in four live births, 11 spontaneous abortions and 66 pregnancies that were on-going or reported undocumented outcomes.

CONCLUSIONS

Initial analysis, limited by sample size and follow-up, identified no new safety concerns for pregnancy outcomes in females directly or indirectly exposed to vedolizumab. However, vedolizumab should be used during pregnancy only if the benefits to the mother outweigh the risks to the mother/unborn child.