REVIEW  AUTOIMMUNE CUTANEOUS DISEASES AND PREGNANCY: MANAGEMENT AND TREATMENT 

Giornale Italiano di Dermatologia e Venereologia 2019 June;154(3):256-62

DOI: 10.23736/S0392-0488.18.06153-9

Copyright © 2018 EDIZIONI MINERVA MEDICA

language: English

Autoimmune bullous diseases during pregnancy: insight into pathogenetic mechanisms and clinical features

Claudio FELICIANI ¹, Giovanni GENOVESE ^{2, 3}, Roberto D’ASTOLTO ¹, Paolo PONTINI ^{2, 3}, Angelo V. MARZANO ^{2, 3} ✉

¹ Section of Dermatology, Department of Medicine and Surgery, University of Parma, Parma, Italy; ² Unit of Dermatology, Fondazione IRCCS Ca’ Granda - Ospedale Maggiore Policlinico, Milan, Italy; ³ Department of Physiopathology and Transplantation, University of Milan, Milan, Italy

Pemphigoid gestationis (PG), also known as herpes gestationis, is the prototypic pregnancy-associated autoimmune bullous disease (AIBD), but also the other AIBDs, notably pemphigus vulgaris, may begin or exacerbate during pregnancy. Although the increase in concentration of T and B regulatory cells makes pregnancy a state of increased immunologic tolerance toward the semiallogeneic fetal antigens, a prevalent T helper (Th) 2 profile, that is reported to be associated with pregnancy, may cause exacerbation of pemphigus and AIBDs in general during this period. Active disease may lead to stillbirth, spontaneous abortion, preterm pregnancy, low birthweight, and neonatal pemphigus. PG is a rare AIBD usually starting during the third trimester of pregnancy and healing in the postpartum. It is due to the formation of autoantibodies directed against different epitopes of bullous pemphigoid (BP) 180 as a consequence of the aberrant expression of BP180 in the placental tissue of genetically predisposed women. PG is characterized by vesicles with herpetiform distribution, blisters and urticarial elements typically involving the periumbilical area and the distal portion of the upper limbs. Diagnosis is based on: 1) physical examination; 2) histopathological pattern consisting of a dermal inflammatory infiltrate rich in eosinophils; 3) direct immunofluorescence test demonstrating linear deposits of complement fraction 3 and immunoglobulin G along the basement membrane zone; 4) detection of circulating autoantibodies by means of indirect immunofluorescence or enzyme linked immunosorbent assay. Here, we provide an updated overview on the pathophysiologic mechanisms of pregnancy-associated or pregnancy-exacerbated AIBDs, focusing also on peculiar clinical features of these disorders.

KEY WORDS: Vesicobullous skin diseases; Pemphigus; Pemphigoid gestationis; Pregnancy