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J Autoimmun. 2016 Nov;74:6-12. doi: 10.1016/j.jaut.2016.07.010. Epub 2016 Aug 2.

Fetal outcome and recommendations of pregnancies in lupus nephritis in the 21st century. A prospective multicenter study.

Author information

1
Nephrological Unit, Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico, Milan, Italy. Electronic address: gmoroni@policlinico.mi.it.
2
Department of Medicine-DIMED, Division of Rheumatology, University of Padova, Italy.
3
Nephrological Unit, Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico, Milan, Italy.
4
Department of Clinical and Experimental Medicine, Rheumatology Unit, University of Pisa, Italy.
5
Department of Reproductive Medicine and Child Development Division of Obstetrics and Gynecology, University of Pisa, Italy.
6
Department of Obstetrics and Gynecology Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico, Milan, Italy.
7
Rheumatology and Clinical Immunology Unit, Spedali Civili of Brescia, Italy.
8
Laboratory of Clinical Chemistry and Microbiology, Fondazione IRCCS Ca' Granda Ospedale, Maggiore Policlinico, Milan, Italy.
9
Experimental Laboratory of Immunological and Rheumatologic Researches, IRCCS Istituto, Auxologico Italiano, Milan, Italy.
10
Dipartimento di Scienze della Salute, Azienda Ospedaliera San Paolo, Milan, Italy.
11
Nephrology, Azienda Ospedaliera della Provincia di Lecco, Lecco, Italy.
12
Experimental Laboratory of Immunological and Rheumatologic Researches, IRCCS Istituto, Auxologico Italiano, Milan, Italy; Department of Clinical Sciences and Community Health, University of Milan, Milan, Italy.
13
Department of Medicine, Cumming School of Medicine, University of Calgary, Calgary, Canada; Community Health Sciences, Cumming School of Medicine, University of Calgary, Calgary, Canada.

Abstract

The aim of this multicenter study was to assess the present risk of fetal complications and the inherent risk factors in pregnant women with lupus nephritis. Seventy-one pregnancies in 61women (59 Caucasians and 2 Asians) with lupus nephritis were prospectively followed between October 2006 and December 2013. All patients received a counselling visit within 3 months before the beginning of pregnancy and were followed by a multidisciplinary team. At baseline mild active nephritis was present in 15 cases (21.1%). Six pregnancies (8.4%) resulted in fetal loss. Arterial hypertension at baseline (P = 0.003), positivity for lupus anticoagulant (P = 0.001), anticardiolipin IgG antibodies (P = 0.007), antibeta2 IgG (P = 0.018) and the triple positivity for antiphospholipid antibodies (P = 0.004) predicted fetal loss. Twenty pregnancies (28.2%) ended pre-term and 12 newborns (16.4%) were small for gestational age. Among the characteristics at baseline, high SLE disease activity index (SLEDAI) score (P = 0.027), proteinuria (P = 0.045), history of renal flares (P = 0.004), arterial hypertension (P = 0.009) and active lupus nephritis (P = 0.000) increased the probability of preterm delivery. Odds for preterm delivery increased by 60% for each quarterly unit increase in SLEDAI and by 15% for each quarterly increase in proteinuria by 1 g per day. The probability of having a small for gestational age baby was reduced by 85% in women who received hydroxychloroquine therapy (P = 0.023). In this study, the rate of fetal loss was low and mainly associated with the presence of antiphospholipid antibodies. Preterm delivery remains a frequent complication of pregnancies in lupus. SLE and lupus nephritis activity are the main risk factors for premature birth. Arterial hypertension predicted both fetal loss and preterm delivery. Based on our results the key for a successful pregnancy in lupus nephritis is a multidisciplinary approach with close medical, obstetric and neonatal monitoring. This entails: a) a preconception evaluation to establish and inform women about pregnancy risks; b) planning pregnancy during inactive lupus nephritis, maintained inactive with the lowest possible dosage of allowed drugs; c) adequate treatment of known risk factors (arterial hypertension, antiphospholipid and antibodies); d) close monitoring during and after pregnancy to rapidly identify and treat SLE flares and obstetric complications.

KEYWORDS:

Fetal outcome; Lupus nephritis; Pregnancy; Preterm delivery; Small for gestational age; Systemic lupus erythematosus

PMID:
27496151
DOI:
10.1016/j.jaut.2016.07.010
[Indexed for MEDLINE]

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