The Pharmacologic Assessment of A Novel Lymphocyte Function-Associated Antigen-1 Antagonist (SAR 1118) for the Treatment of Keratoconjunctivitis Sicca in Dogs

作者：Christopher John Murphy, Ellison Bentley, Paul Elliott Miller, Kim McIntyre, Gary Leatherberry, Richard Redd Dubielzig, Elizabeth A. Giuliano, Cecil P. Moore, Thomas E. Phillips, P.Blaise Smith, Elizabeth Prescott, Jacqueline M. Miller, Peter T. Thomas, Randall H. Scagliotti, Douglas W Esson, Tom Gadek, Charles A. O’neill · 发表于：Investigative Ophthalmology & Visual Science · 年份：2011 · DOI：10.1167/iovs.09-5078 · 被引用次数：85 · 研究领域：Ocular Surface and Contact Lens、Corneal Surgery and Treatments、Ocular Infections and Treatments

PURPOSE: Keratoconjunctivitis sicca (KCS) is characterized by inflammation and decreased production of tears containing increased levels of cytokines. The release occurs in the setting of conjunctival and lacrimal gland inflammation, potentially mediated by the interaction between lymphocyte function-associated antigen (LFA)-1, a cell surface protein found on lymphocytes, and its cognate ligand intercellular adhesion molecule (ICAM)-1. SAR 1118 is a novel LFA-1 antagonist and may be an effective therapeutic agent for the treatment of KCS. The following studies were performed to assess the in vitro activity of SAR 1118 and to evaluate the clinical efficacy of topical SAR 1118 for the treatment of idiopathic canine KCS. METHOD: Pharmacodynamics were assessed by measuring the ability of SAR 1118 to inhibit Jurkat T-cell binding with recombinant human ICAM-1 and to inhibit cytokine release from human peripheral blood mononuclear cells (PBMCs) stimulated by staphylococcal enterotoxin B. For the assessment of clinical efficacy, 10 dogs diagnosed with idiopathic KCS were treated with SAR 1118 1% topical ophthalmic solution three times daily for 12 weeks. Schirmer's tear test (STT) was used to measure tear production. RESULTS: SAR 1118 demonstrated concentration-dependent inhibition of Jurkat T-cell attachment, inhibition of lymphocyte activation, and release of inflammatory cytokines, particularly the Th1, Th2, and Th17 T-cell cytokines IFN-γ, IL-2, and IL-17F, respectively. Mean ST...