Pregnancy and the kidney transplant recipient:

[Obstetrical outcome of renal transplant patients followed in a type III maternity hospital. Retrospective study from 2000 to 2020]

AIM

To describe pregnancy outcome of kidney transplant patients till 1 year postpartum.

METHODS

This retrospective, monocentric study included 15 kidney transplant patients who presented 18 pregnancies, between January 2000 and January 2020. For each of them, we searched for possible obstetrical, fetal and renal complications and we evaluated renal function before, during and after pregnancy.

RESULTS

The live birth rate was 84% (16/19) with an average gestational age at delivery of 37 weeks of gestation. The rate of prematurity was 50% (8/16), gestational diabetes was 16.6% (3/18) and preeclampsia was 27.7% (5/18). Cesarean section was performed in 61.1% (11/18) of cases including, 81.8% (9/11) unplanned surgery. The average birth weight was 2635 grams and 37.5% (6/16) of the newborn were small for gestational age. All patients had stable renal function before conception of pregnancy. We noticed two acute graft rejection during pregnancy with only one resulting in graft loss. Four patients had a reduced graft function in 12months of the postpartum.

CONCLUSION

Risk of maternal, fetal and renal complications remained high in kidney transplant recipients. Pregnancy should be carefully planned in transplanted women associated with adequate follow-up according to clinical guidelines (normal renal function and blood pressure without proteinuria before pregnancy, no recent graft rejection, period of one year after transplant respected and no teratogenic treatment in the month before pregnancy).

Evaluation of the Development of Post-Vaccination Immunity against Selected Bacterial Diseases in Children of Post-Solid-Organ-Transplant Mothers

Pregnancy after organ transplantation is considered high-risk and requires supervision in specialized centers. The impact of immunosuppression on the developing fetus is still the subject of research. It has been shown that it affects lymphocyte populations in the first year of life. For this reason, researchers suggest postponing mandatory infant vaccinations. The aim of the study was to analyze the influence of intrauterine exposure of the fetus to immunosuppression on the immunogenicity of protective vaccinations against selected bacterial pathogens. The ELISA method was used to determine the concentration of post-vaccination IgG antibodies against diphtheria, tetanus, pertussis, tuberculosis, H. influenzae type B, and S. pneumoniae in 18 children of mothers who underwent organ transplantation. The results were compared with the control group (n = 21). A comparison of the incidence of adverse post-vaccination reactions between the analyzed groups was also performed. There were no statistically significant differences in the immunogenicity of the analyzed vaccines between children of mothers who underwent organ transplantation and the age-matched general pediatric population. There were no differences in the incidence of adverse post-vaccination reactions between the analyzed groups. The obtained results do not indicate the need to modify the current protective vaccination schemes against bacterial pathogens in children of mothers who underwent organ transplantation.

Embarazo y trasplante renal. Una revisión sistemática

Introducción: El trasplante renal es la mejor opción como tratamiento renal sustitutivo, por sus múltiples beneficios, permitiendo además a las mujeres con enfermedad renal crónica la posibilidad de embarazo y de una gestación exitosa.Objetivo: Conocer y sintetizar la producción científica más actualizada sobre el embarazo en mujeres con trasplante renal.Metodología: Se realizó una revisión sistemática siguiendo las recomendaciones de la declaración PRISMA, en las bases de datos PubMed, ProQuest, Scielo y Scopus. La estrategia de búsqueda se estableció con los siguientes descriptores: “pregnancy” y “kidney transplantation”. Se incluyeron artículos originales y revisiones sistemáticas, en español e inglés publicados entre 2015 y 2020.Resultados: Se seleccionaron 18 artículos. Se encontró una edad media de las mujeres trasplantadas en el momento del parto entre los 30 y 34 años y un tiempo medio entre el trasplante renal y el embarazo de 4,2 años. Las complicaciones más frecuentes en la madre fueron la preeclampsia, la hipertensión arterial inducida por el embarazo y la infección del tracto urinario, así como un aumento de la creatinina sérica y proteinuria. La mayoría de los embarazos terminaron en cesáreas y, entre los nacidos vivos, existió un gran número de prematuros.Conclusiones: El embarazo en mujeres con trasplante renal resulta exitoso siempre que la función renal se mantenga estable y no aparezcan complicaciones. Las complicaciones más frecuentes durante el embarazo son la hipertensión y la preeclampsia. La complicación más frecuente en el neonato es la prematuridad.

Comparison of pregnancy outcomes in Dutch kidney recipients with and without calcineurin inhibitor exposure: a retrospective study

Within pregnancies occurring between 1986 and 2017 in Dutch kidney transplant recipients (KTR), we retrospectively compared short‐term maternal and foetal outcomes between patients on calcineurin inhibitor (CNI) based (CNI+) and CNI‐free immunosuppression (CNI−). We identified 129 CNI+ and 125 CNI− pregnancies in 177 KTR. Demographics differed with CNI+ having higher body mass index (P = 0.045), shorter transplant‐pregnancy interval (P < 0.01), later year of transplantation and ‐pregnancy (P < 0.01). Serum creatinine levels were numerically higher in CNI+ in all study phases, but only reached statistical significance in third trimester (127 vs. 105 µm; P < 0.01), where the percentual changes from preconceptional level also differed (+3.1% vs. −2.2% in CNI−; P = 0.05). Postpartum both groups showed 11–12% serum creatinine rise from preconceptional level. Incidence of low birth weight (LBW) tended to be higher in CNI+ (52% vs. 46%; P = 0.07). Both groups showed equal high rates of preterm delivery. Using CNIs during pregnancy lead to a rise in creatinine in the third trimester but does not negatively influence the course of graft function in the first year postpartum or direct foetal outcomes. High rates of preterm delivery and LBW in KTR, irrespective of CNI use, classify all pregnancies as high risk.

Maternal and fetal outcomes of pregnancy in chronic kidney disease: diagnostic challenges, surveillance and treatment throughout the spectrum of kidney disease

Pregnancy requires several physiological adaptations from the maternal organism, including modifications in the glomerular filtration rate and renal excretion of several products. Chronic kidney disease (CKD) can negatively affect these modifications and consequently is associated with several adverse maternal and fetal adverse outcomes (gestational hypertension, progression of renal disease, pre-eclampsia, fetal growth restriction, and preterm delivery). A multidisciplinary vigilance of these pregnancies is essential in order to avoid and/or control the harmful effects associated with this pathology. Dialysis and transplantation can decrease the risks of maternal and fetal complications, nonetheless, the rates of complications remain high comparing with a normal pregnancy. Several recent developments in this area have improved quality and efficacy of treatment of pregnant women with CKD. This article summarizes the most recent literature about CKD and pregnancy.

Pregnancy After Kidney Transplantation

BACKGROUND

Pregnancy after kidney transplantation is an uncommon event. In addition to the risk to the child and the mother, pregnancy has a certain risk for the transplanted kidney.

METHODS

We made a retrospective analysis of pregnancy and kidney function over a 49-year period in women with transplanted kidneys monitored at the National Transplant Centre, University Medical Centre Ljubljana, Ljubljana, Slovenia.

RESULTS

We analyzed 22 pregnancies in 18 women (26-39 years old) 78 ± 37 months after transplantation. Serum creatinine before conception was 92 ± 26 μmol/L; 3 years after delivery, it was 117 ± 67 μmol/L. There were no rejections during pregnancy. Three rejections occurred in the first 9 months after delivery. The median duration of pregnancies was 37 weeks. Preeclampsia occurred in 4 women and severe eclampsia occurred in 2 women. In 19 cases, delivery was by caesarean section. One child was born with trisomy of chromosome 21 and 3 children were born with minor congenital anomalies.

CONCLUSIONS

Renal function and proteinuria did not deteriorate 3 years after pregnancy, even after 2 pregnancies. Rejections in the early post-pregnancy period were common. Preeclampsia was more frequent than in the average population. The incidence of major congenital anomalies was comparable to that seen in pregnant women without immunosuppression.

Successful pregnancy after in vitro fertilization in an ABO-incompatible kidney transplant recipient receiving rituximab: a case report

Background

Successful pregnancy outcomes after in vitro fertilization in kidney transplant recipients have been reported, but few cases of successful pregnancy after ABO-incompatible kidney transplantation have been described. Herein, we report on a successful pregnancy after in vitro fertilization in an ABO-incompatible kidney transplant recipient with rituximab, focusing on the changes in immunity.

Case presentation

A 35-year-old woman with end-stage kidney disease caused by IgA nephropathy was referred for kidney transplantation and successfully underwent an ABO-incompatible living-donor kidney transplant using rituximab from her 66-year-old father at the age of 36. Because she and her husband desired childbearing, they received fertility treatments, and embryo cryopreservation was performed before transplantation. Two years after the transplant, she desired pregnancy. Although immunoglobulin levels such as IgG, IgA and IgM had recovered to almost normal range, the peripheral CD19⁺ cells and CD20⁺ cells remained depleted. At 6 months after conversion from mycophenolate mofetil to azathioprine, frozen embryo transfer was performed during the hormone replacement cycle.

At 37 weeks and 4 days gestation, a healthy baby girl weighing 2220 g was delivered by cesarean section for arrest of labor. There were no complications in both the recipient and her baby during the perinatal period. At 5 years after the transplant, the recipient has had no major complications including rejection or infection.

Conclusions

It is possible for women receiving ABO-incompatible kidney transplantation with rituximab to successfully become pregnant and deliver a heathy baby after in vitro fertilization, if IgG levels recover to normal range despite depleted peripheral blood B cells.