Intravenous immunoglobulin in autoimmune and inflammatory dermatoses. A review of proposed mechanisms of action and therapeutic applications

Pediatric Sweet syndrome and immunodeficiency successfully treated with intravenous immunoglobulin

Painful erythematous plaques and a pathognomonic, dense, dermal infiltrate of neutrophils characterize Sweet syndrome. Although numerous instances of this disease have been reported in children, only four have had an associated immunodeficiency to date. Sweet syndrome has been traditionally treated with systemic corticosteroids despite an unknown pathogenesis. Prior reports suggest that immunodeficient children with Sweet syndrome may have a persistent course and fail to respond to standard treatment. We describe a child with debilitating Sweet syndrome and a primary immunodeficiency whose symptoms were controlled with intravenous immunoglobulin and dapsone.

Use of intravenous immunoglobulin in children with stevens-johnson syndrome and toxic epidermal necrolysis: seven cases and review of the literature

Stevens-Johnson syndrome (SJS) and toxic epidermal necrolysis are the most severe cutaneous reactions that occur in children. Off-label use of human intravenous immunoglobulin (IVIG) has been reported in a number of autoimmune and cell-mediated blistering disorders of the skin, including severe cutaneous drug reactions. We review 28 previous reports in which IVIG was used in pediatric patients with SJS and toxic epidermal necrolysis and discuss our experience in 7 children with SJS, in whom no new blisters developed within 24 to 48 hours after IVIG administration and rapid recovery ensued. IVIG seems to be a useful and safe therapy for children with severe cutaneous drug reactions. Well-controlled, prospective, multicenter clinical trials are needed to determine optimal dosing guidelines and to compare the efficacy and safety of IVIG with other potentially effective modalities.

Treatment of toxic epidermal necrolysis with intravenous immunoglobulin in children

BACKGROUND

Toxic epidermal necrolysis (TEN) is an acute illness characterized by rapid onset of skin necrosis and high mortality. Standard treatment is primarily aimed at supportive care in a burn unit setting.

OBJECTIVE

We evaluated the outcome of 8 pediatric patients treated for TEN with intravenous immunoglobulin (IVIg) over a 3-year period.

METHODS

We performed a retrospective analysis of pediatric patients with a diagnosis of TEN between 1999 and 2001, obtained from a computerized database.

RESULTS

Mean body surface involvement of 8 patients treated with IVIg was 67%. The average length of hospitalization was 13.6 days, with an average delay in treatment of 3.2 days. The average time to arrest in progression of lesions was 2.1 days and to complete re-epithelialization, 8.1 days. The mortality rate was 0%. The majority of complications were infectious.

CONCLUSION

IVIg is a safe and effective treatment for TEN in the pediatric population. Randomized trials are needed to further evaluate the efficacy of IVIg compared with other modalities.

Evolving new therapies of autoimmune hepatitis

Refinements in the understanding of the mechanisms of immunocyte activation and the emergence of new immunosuppressive agents with highly selective actions has created opportunities for improving the treatment of autoimmune hepatitis. Drugs, such as budesonide and deflazacort, may inhibit immunocyte activation and limit corticosteroid-related side effects. Agents, such as cyclosporine and tacrolimus, can impair calcineurin activity and restrict the generation of transcription factors necessary for T cell responses. Intravenous immunoglobulin can bind anti-idiotype antibodies and reduce interleukin-2 secretion, and monoclonal antibodies directed against critical components of the T cell activation cascade can dampen the immune reaction. Drugs, such as mycophenolate mofetil, cyclophosphamide, methotrexate, and KF20444, can inhibit T cell proliferation, and other interventions promise to deplete activated T cells, impair effector mechanisms, and induce self-tolerance.