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Background: Repository corticotropin injection (RCI) has been suggested to exert immunomodulatory and anti-inflammatory effects in ocular inflammation. The index retrospective study aimed to evaluate the efficacy and tolerability of subcutaneous RCI in patients with active scleritis or uveitis., Main Body: Medical records of patients who were diagnosed with different types of active scleritis or uveitis and received RCI for more than six months at a tertiary eye center were reviewed. Patient characteristics including age, sex, comorbidities, clinical findings, treatment details, and adverse events were recorded. A total of 17 eyes of 17 patients were included. Median age was 43 years old and 53% of patients were male. Mean treatment duration was 25.4 ± 15.5 months. Indications for RCI therapy were scleritis (7 anterior and 1 posterior) (47.8%), panuveitis (17.4%), retinal vasculitis (17.4%), chronic/recurrent anterior uveitis (13%), and posterior uveitis (4.35%). RCI was initiated at a dose of 40 to 80 units 3 times weekly. Given the adequate control of inflammation, RCI was successfully discontinued in four patients (23.5%). Prior to RCI therapy, 14 (82.3%) patients were on oral prednisone at an average of 10 mg daily (range 2.5-40 mg), and two (11.7%) patients discontinued prednisone immediately before initiating RCI due to side effects. After six months of therapy, the prednisone dose was reduced in four (23.5%) patients to an average of 3 mg daily (range 1-5 mg) and was stopped in eight (53%) patients. Concomitant immunomodulatory therapies (IMTs) included mycophenolate mofetil (23.5%) and methotrexate (23.5%), and adalimumab (23.5%). Ten patients were on IMTs prior to using RCI, and during the course of treatment, IMT was stopped in two patients and reduced in one. Side effects included insomnia (23%), hypertension (11.7%), lower extremity edema (11.7%), hyperglycemia (11.7%), weight gain (11.7%), and infection (5.8%)., Conclusion: RCI may be considered as a potential therapy with acceptable tolerability for patients with non-infectious scleritis or uveitis., (© 2024. The Author(s).)

Background: Ocular inflammatory diseases, including scleritis and uveitis, have been widely treated with immunomodulatory therapies (IMTs) as a steroid-sparing approach. Such strategy includes conventional therapies (antimetabolites, alkylating agents, and calcineurin inhibitors) as well as biologic agents like adalimumab, infliximab, rituximab, and tocilizumab. Cyclophosphamide (CP) is an alkylating agent and mainly inhibits the functioning of both T and B cells. Though known to have potential adverse events, including bone marrow suppression, hemorrhagic cystitis, and sterility, CP has been shown to be efficacious, especially in recalcitrant cases and when used intravenous (IV) for a limited period., Main Findings: We conducted a retrospective case-series to assess the safety and efficacy of CP therapy for patients with severe ocular inflammatory diseases who failed other IMTs. Medical records of 1295 patients who presented to the Uveitis Clinic at the Byers Eye Institute at Stanford between 2017 and 2022 were reviewed. Seven patients (10 eyes) who received CP therapy for ocular inflammatory diseases with at least one year of follow-up were included. The mean age of the patients (4 males, 3 females) was 61.6 ± 14.9 (43.0-89.0) years. Clinical diagnoses included necrotizing scleritis (5 eyes), peripheral ulcerative keratitis (2 eyes), orbital pseudotumor (1 eye), HLA-B27 associated panuveitis and retinal vasculitis (2 eyes). Ocular disease was idiopathic in 3 patients, and was associated with rheumatoid arthritis, IgG-4 sclerosing disease, dermatomyositis, and ankylosing spondylitis in 1 patient each. All the patients had history of previous IMT use including methotrexate (5), mycophenolate mofetil (3), azathioprine (1), tacrolimus (1), adalimumab (2), infliximab (4), and rituximab (1). The mean follow-up time was 34.4 ± 11.0 (13-45) months, and mean duration of CP therapy was 11.9 ± 8.8 (5-28) months. Remission was achieved in 5 patients (71.4%). Four patients (57.1%) experienced transient leukopenia (white blood cell count < 4000/mL)., Short Conclusion: CP therapy can be considered a potentially effective and relatively safe therapeutic option for patients with severe ocular inflammatory diseases who failed other IMTs including biologics (TNFa and CD20 inhibitors)., (© 2024. The Author(s).)