Treatment of Autoimmune Bullous Diseases During Pregnancy and Lactation: A Review Focusing on Pemphigus and Pemphigoid Gestationis

[Skin fragility in autoimmune blistering diseases of the skin]

In many disorders, skin and/or mucosal changes are dominated by blisters, wounds, or erosions. While these changes can be observed during infective, traumatic, metabolic, or inflammatory processes, these are normally clinical hallmarks of the disruption of the cytoarchitectural stability of the skin. Several proteins, such as those located in the dermal-epidermal junction zone and forming the hemidesmosomes, or those forming epidermal desmosomes are crucial for the maintenance of skin integrity. Defective function may be genetically determined due to impaired or absent production of specific proteins (i.e., epidermolysis bullosa) or due to autoimmune disorders that lead to the production of autoreactive antibodies targeting desmosomal or hemidesmosomal skin antigens. The latter group of diseases are classically named autoimmune blistering diseases of the skin. These can be divided in the pemphigoid group, where antigens are components of the hemidesmosomes, and pemphigus group, where desmosomal proteins are targeted. In this review, we provide a short vademecum of autoimmune skin disorders that are associated with skin fragility.

Gestational Pemphigoid-From Molecular Mechanisms to Clinical Outcomes: A Case Report and Review of Literature

Gestational pemphigoid is a rare, autoimmune, subepidermal bullous disease with an incidence of 1 in 50,000 pregnancies, displaying itself through pruritic erythema and urticarial papules and plaques that evolve into tense bullae. Histopathological findings consist of subepidermal vesicles with perivascular eosinophils and lymphocytes, and direct immunofluorescence reveals C3 complement and, more rarely, IgG in a linear band along the basement membrane. The course is usually self-limiting within 6 months after delivery but, later, can be triggered by subsequent pregnancies, menstruation, or treatment with oral contraceptives. The newborn can be affected due to the transplacental passage of the maternal immunoglobulins, but, usually, less than 10% of newborns will develop lesions similar to pemphigoid gestationis. The diagnosis and management pose a difficult challenge and should be guided by the severity of the disease. We, therefore, provide a short literature review and discussion plus a case from our clinic, with a typical presentation but a delayed diagnosis and an undulating evolution, with severe manifestations and particularly difficult management due to unexpected complications.

Use of Intravenous Immunoglobulin in the Treatment of Pemphigoid Gestationis: A Case Report

Gestational pemphigoid is a rare autoimmune skin condition specific to pregnancy and the postpartum period, with a variable course. There are currently no standardized guidelines referring to evidence-based therapeutic strategies. Intravenous immunoglobulin (IVIG) has recently emerged as a safe and effective steroid-sparing option as a second-line treatment for cases refractory to conventional steroid therapy and for managing relapses. We present the case of a 36-year-old primigravida patient diagnosed with gestational pemphigoid who initially had a difficult clinical course despite treatment with high-dose oral steroids. A first cycle of IVIG combined with steroids (with a gradual dose tapering regimen) was administered, showing initial clinical improvement. However, the patient experienced a relapse that required a new increase in steroid dose and interruption of pregnancy due to fetal growth restriction. Given persistent disease activity at the first outpatient follow-up, a combination of oral steroids with a gradual dose tapering regimen, along with a new cycle of IV immunoglobulin and azathioprine, was initiated, leading to complete resolution by the 19th week of outpatient follow-up. No adverse effects associated with IVIG were reported during the course of follow-up.

Neonatal pemphigus vulgaris

A neonate presented to a tertiary clinic with blisters and erosions over his trunk and extremities. The mother had multiple erosions with crusts affecting the scalp, oral cavity and trunk present since the first trimester and worse since delivery. Skin biopsy for histopathology and direct immunofluorescence confirmed pemphigus vulgaris (PV) in the mother. Indirect immunofluorescence assays for serum antibodies against desmogleins 1 and 3 were positive in both mother and baby confirming a diagnosis of neonatal PV. The baby's lesions healed spontaneously within 2 weeks, and the mother was clear at 2 months following treatment with rituximab.

Pemphigus and Pregnancy

Pemphigus in pregnancy is a special clinical scenario that has potential consequences on both maternal and fetal outcomes. Being an autoimmune disease with Th2 preponderance, pemphigus is expected to flare in pregnancy, especially in the first two trimesters. Fetal outcomes like stillbirth and neonatal pemphigus have been reported, the latter being a consequence of a transient transplacental transfer of autoantibodies. Management needs to be individualized keeping the risk/benefit ratios of therapies in mind while optimizing maternal and fetal health. It is crucial to have appropriate counseling regarding conception for women with pemphigus in the child-bearing period because the probability of adverse materno-fetal outcomes is higher if the disease is severe.

Focus on pemphigus treatment publications: A bibliometric and visual analysis (1992-2022)

Pemphigus is a chronic recurrent disease in dermatology. Although it is not very common, its treatment has been an increasing concern in recent years because it is difficult and long-lasting. At present, there are many papers on pemphigus treatment, and to better understand the research trends and research frontiers of pemphigus treatment, it is necessary to conduct a comprehensive systematic review and analysis. We combined bibliometric and visualization methods to analyze 1365 papers published in the Web of Science database from 1992 to 2022, including basic information about countries, institutions and authors, to gain a general understanding of the treatment of pemphigus. Among them, the United States is the country with the most output, Iran's Tehran University of Medical Sciences is the institution with the most published works, and Ahmed, A. Razzaque of Tufts University is the most influential scholar. In addition, we also learned about the research hotspots and frontiers of pemphigus treatment through a series of analyses on the frequency, clustering, keywords bursts and cited literature, and we briefly reviewed the highly cited literature. We found that the current research focuses in the study of pemphigus treatment are the types, pathogenesis, and treatment of pemphigus, including glucocorticoids, immunosuppressants and many other major treatment methods. Hailey-Hailey disease, genetic susceptibility, and traditional Chinese medicine are potential research hotspots. Rituximab is a research frontier. In conclusion, we hope to provide new research ideas for promoting the development of pemphigus treatment.

Non-biologic immunosuppressive drugs for inflammatory and autoimmune skin diseases

Non-biologic immunosuppressive drugs, such as azathioprine, dapsone or methotrexate are fundamental treatment options for a wide range of autoimmune and chronic inflammatory skin diseases. Some of these drugs were initially used for malignancies (e.g., azathioprine or methotrexate) or infectious diseases (e.g., hydroxychloroquine or dapsone) but are nowadays mostly used for their immunosuppressive/immunomodulating action. Although dermatologists have years of clinical experience with these drugs, some of the mechanisms of action are not fully understood and are the subject of research. Although these drugs are commonly used, lack of experience or knowledge regarding their safety profiles and management leads to skepticism among physicians. Here, we summarize the mechanism of action and detailed management of adverse effects of the most commonly used immunosuppressive drugs for skin diseases. Furthermore, we discuss the management of these drugs during pregnancy and breastfeeding, as well as their interaction and handling during vaccination.

Nicht-Biologika-Immunsuppressiva bei entzündlichen und autoimmunen Hautkrankheiten: Non-biologic immunosuppressive drugs for inflammatory and autoimmune skin diseases

Nicht‐Biologika‐Immunsuppressiva wie Azathioprin, Dapson oder Methotrexat sind grundlegende Behandlungsmöglichkeiten für ein breites Spektrum von Autoimmunerkrankungen und chronisch‐entzündlichen Hauterkrankungen. Einige dieser Medikamente wurden ursprünglich bei malignen Erkrankungen (zum Beispiel Azathioprin oder Methotrexat) oder Infektionskrankheiten (zum Beispiel Hydroxychloroquin oder Dapson) eingesetzt, werden aber heute hauptsächlich wegen ihrer immunsuppressiven/immunmodulierenden Wirkung verwendet. Obwohl Dermatologen über jahrelange klinische Erfahrung mit diesen Arzneimitteln verfügen, sind einige der Wirkmechanismen noch nicht vollständig geklärt und noch Gegenstand der Forschung. Obwohl diese Medikamente häufig eingesetzt werden, führen mangelnde Erfahrung oder fehlendes Wissen über ihre Sicherheitsprofile und ihr Management zu einer skeptischen Haltung bei den Ärzten. Hier fassen wir den Wirkmechanismus und das detaillierte Management der Nebenwirkungen der am häufigsten verwendeten immunsuppressiven Medikamente für Hautkrankheiten zusammen. Darüber hinaus diskutieren wir den Umgang mit diesen Medikamenten während der Schwangerschaft und Stillzeit sowie ihre Wechselwirkung und Handhabung im Zusammenhang mit Impfungen.

Do We Need to Monitor for Graves' Disease After a Diagnosis of Pemphigoid Gestationis?

Pemphigoid gestationis (PG) is a rare autoimmune bullous disease that occurs during pregnancy or the postpartum period. PG has been associated with an increased risk of Graves' disease possibly due to shared genetic factors and immune system fluctuations during pregnancy. However, the evidence supporting the association between PG and Graves' disease is mixed. Although dermatologists are cautioned to watch for Graves' disease in patients with a history of PG, this guidance is based on a single cohort where most patients were diagnosed with Graves' disease prior to PG onset. Recent data failed to find an association between Graves' disease and PG but did not capture the lifetime risk of Graves' disease in these patients. Future studies could focus on long-term follow-up of females with PG, shedding light on the lifetime risk profiles of these patients.

Autoimmune bullous diseases in pregnancy: an overview of pathogenesis, clinical presentations, diagnostics and available therapies

Autoimmune bullous diseases (AIBDs) are rare organ-specific diseases characterized by the appearance of blisters and erosions on the skin and mucous membranes. These dermatoses are marked by the development of autoantibodies targeting the autoantigens located in intercellular junctions, i.e., between keratinocytes or in the basement membrane area. Therefore, the fundamental division of AIBDs into the pemphigus and pemphigoid groups exists. Although AIBDs are uncommon in the general population, their overall incidence is somewhat higher in women of all ages, for which a pregnant women can be likely affected too. While the pemphigoid gestationis is exclusive bullous dermatosis of pregnancy, the other AIBDs can also start or worsen during this period. The appearance of AIBDs in childbearing women is a particularly sensitive situation requiring exceptional clinicians' caution due to the possibility of pregnancy complications with adverse effects and risks to the mother and the child. Also, there are numerous management difficulties in the period of pregnancy and lactation related to the drugs' choice and safety. This paper aimed to outline the pathophysiologic mechanisms, clinical manifestations, diagnostic approach and therapy of the most commonly recognized AIBDs in pregnancy.

Burden of pemphigus vulgaris with a particular focus on women: A review

Pemphigus vulgaris is a chronic autoimmune mucocutaneous blistering disorder. Apart from the disease itself, other aspects of patients' life, including psychological, social, and financial, can be affected. Women are particularly more disposed to the impact of the disease due to their physiological characteristics, the specific periods of pregnancy and lactation as well as their social and familial role. In this review, we summarized the burden of pemphigus vulgaris on various aspects of women's lives. It is essential to understand these problems and provide appropriate support for patients with such a burdensome disease.

Pemphigoid gestationis: a rare pregnancy dermatosis treated with a combination of IVIg and rituximab

Pemphigoid gestationis is a rare autoimmune subepidermal bullous dermatosis occurring during pregnancy and post partum. A 32-year-old woman developed itchy urticarial wheals over the trunk and extremities at 6 months of gestation. This was not controlled with antihistamines, and 2 months later, the patient developed multiple vesiculobullous lesions. The patient had an exacerbation 3 weeks post-delivery. She did not go into remission for 6 months post partum despite treatment with prednisolone 40 mg/day, doxycycline 100 mg two times per day and dapsone 100 mg/day. The patient went into remission following treatment with three courses of intravenous immunoglobulin 2 mg/kg/course and 2 doses of rituximab 1 g at a 2-week interval.