IL-4 and cellular adhesion molecule (CAM) pathway are involved in cicatricial pemphigoid scarring process

Ocular cicatricial pemphigoid

PURPOSE OF REVIEW

To review the content and importance of articles on ocular cicatricial pemphigoid (OCP), or mucous membrane pemphigoid (MMP) with relevance to ocular involvement, published from 2005 to 2006.

RECENT FINDINGS

There is wide antigenic heterogeneity in MMP and OCP and attempts are being made to link this with clinical variations with varying degrees of success. A larger study demonstrates a link between multiple autoantibody reactivity and disease severity. Details of epitope specificity are emerging. A highly sensitive ELISA for laminin 5 has been developed which may provide prognostic information.Clinically, younger OCP patients show more severe ocular disease and are less well controlled by medication. A systematic review shows good evidence only for steroids and cyclophosphamide in OCP. Continued small trials suggest some role for the expensive intravenous immunoglobulin therapy in OCP where conventional treatment fails. Ocular reconstruction surgery has made some progression, and is enhanced by adjunctive medical therapy; osteo-odonto-keratoprosthesis offers some hope of prolonged retention of limited vision in end-stage disease.

SUMMARY

OCP remains a difficult disease to manage well and the progress being made in understanding disease mechanisms is whence true disease-modifying, safe therapy is likely to emerge in the future.

Mucous membrane pemphigoid: an update

PURPOSE OF REVIEW

To review articles on mucous membrane pemphigoid, published between June 2004-May 2005.

RECENT FINDINGS

Decreased glycosylation of mucin was found in patients with ocular cicatricial pemphigoid. A unique antigen in oral mucous membrane pemphigoid has not yet been identified. Increased vascular cell adhesion molecule and intercellular adhesion molecule 1 expression was found in skin of patients affected by mucous membrane pemphigoid. Autoreactive T cells to an epitope of bullous pemphigoid antigen 180 kilodaltons were identified in the blood of some patients with mucous membrane pemphigoid. Circulating IgA against an antigen in mucous membrane pemphigoid was found in about 20% of patients, without prognostic significance. Enhanced sensitivity for direct immunofluorescence was reported if skin biopsy specimens were stored for 24 hours in saline. An enzyme-linked immunosorbent assay for detection of circulating autoantibodies against laminin-5 was developed. Sensitivity was higher than indirect immunofluorescence on salt-split skin and immunoblotting. Patients with younger onset (<60 years) of ocular cicatricial pemphigoid were found to have disease evolution similar to that of an older group (>70 years) but were visually impaired earlier in life. Intravenous immunoglobulin as treatment of ocular cicatricial pemphigoid was found to be superior to conventional immunosuppressants, with fewer side effects and better long-term outcome for halting disease activity. Intraoperative adjunction of mitomycin C during fornix reconstruction with amniotic membrane resulted in achieving a deeper fornix in 83% of patients with various cicatrizing conjunctivitis. Transplantation of cultured epithelial cells of oral mucosa in corneal limbal stem cell deficiency was successful in improving visual acuity and reestablishing corneal transparency in mid- to advanced ocular cicatricial pemphigoid.

SUMMARY

Further advances have been achieved in the field of mucous membrane pemphigoid.