PROPOSED MECHANISM OF ACTION
PROPOSED MECHANISM OF ACTION
UPLIZNA® (inebilizumab-cdon) is engineered for efficient B-cell depletion
- Inebilizumab-cdon is a CD19+ B cell-directed humanized immunoglobulin G1 (IgG1) monoclonal antibody¹
- Following cell surface binding to CD19+ B lymphocytes, inebilizumab-cdon results in antibody-dependent cellular cytolysis (ADCC)1-4
CD19 is a cell surface antigen present on pre-B and mature B lymphocytes1,4
- The precise mechanism by which inebilizumab-cdon exerts a therapeutic effect in neuromyelitis optica spectrum disorder (NMOSD) is unknown¹
B-cell depletion through the randomized-controlled period of the pivotal trial
- B-cell counts were reduced below the lower limit of normal by four weeks in 100% of patients treated with UPLIZNA and remained below the lower limit of normal in 94% of patients for 28 weeks after initiation of treatment1,5
INDICATION AND IMPORTANT SAFETY INFORMATION
UPLIZNA® (inebilizumab-cdon) is indicated for the treatment of neuromyelitis optica spectrum disorder (NMOSD) in adult patients who are anti-aquaporin-4 (AQP4) antibody positive.
IMPORTANT SAFETY INFORMATION
UPLIZNA is contraindicated in patients with:
- A history of life-threatening infusion reaction to UPLIZNA
- Active hepatitis B infection
- Active or untreated latent tuberculosis
WARNINGS AND PRECAUTIONS
Infusion Reactions: UPLIZNA can cause infusion reactions, which can include headache, nausea, somnolence, dyspnea, fever, myalgia, rash, or other symptoms. Infusion reactions were most common with the first infusion but were also observed during subsequent infusions. Administer pre-medication with a corticosteroid, an antihistamine, and an anti-pyretic.
Infections: The most common infections reported by UPLIZNA-treated patients in the randomized and open-label periods included urinary tract infection (20%), nasopharyngitis (13%), upper respiratory tract infection (8%), and influenza (7%). Delay UPLIZNA administration in patients with an active infection until the infection is resolved.
Increased immunosuppressive effects are possible if combining UPLIZNA with another immunosuppressive therapy.
The risk of hepatitis B virus (HBV) reactivation has been observed with other B-cell-depleting antibodies. Perform HBV screening in all patients before initiation of treatment with UPLIZNA. Do not administer to patients with active hepatitis.
Although no confirmed cases of Progressive Multifocal Leukoencephalopathy (PML) were identified in UPLIZNA clinical trials, JC virus infection resulting in PML has been observed in patients treated with other B-cell-depleting antibodies and other therapies that affect immune competence. At the first sign or symptom suggestive of PML, withhold UPLIZNA and perform an appropriate diagnostic evaluation.
Patients should be evaluated for tuberculosis risk factors and tested for latent infection prior to initiating UPLIZNA.
Vaccination with live-attenuated or live vaccines is not recommended during treatment and after discontinuation, until B-cell repletion.
Reduction in Immunoglobulins: There may be a progressive and prolonged hypogammaglobulinemia or decline in the levels of total and individual immunoglobulins such as immunoglobulins G and M (IgG and IgM) with continued UPLIZNA treatment. Monitor the level of immunoglobulins at the beginning, during, and after discontinuation of treatment with UPLIZNA until B-cell repletion especially in patients with opportunistic or recurrent infections.
Fetal Risk: May cause fetal harm based on animal data. Advise females of reproductive potential of the potential risk to a fetus and to use an effective method of contraception during treatment and for 6 months after stopping UPLIZNA.
Adverse Reactions: The most common adverse reactions (at least 10% of patients treated with UPLIZNA and greater than placebo) were urinary tract infection and arthralgia.
References: 1. UPLIZNA (Inebilizumab-cdon) [prescribing information] Horizon 2. Schiopu E, Chatterjee S, Hsu V, et al. Safety and tolerability of an anti-CD19 monoclonal antibody, MEDI-551, in subjects with systemic sclerosis: a phase I, randomized, placebo-controlled, escalating single-dose study. Arthritis Res Ther. 2016;18(1):131. 3. Herbst R, Wang Y, Gallagher S, et al. B-cell depletion in vitro and in vivo with an afucosylated anti-CD19 antibody. J Pharmacol Exp Ther. 2010;335:213-222. 4. Forsthuber TG, Cimbora DM, Ratchford JN, Katz E, Stüve O. B cell-based therapies in CNS autoimmunity: differentiating CD19 and CD20 as therapeutic targets. Ther Adv Neurol Disord. 2018;11: 1756286418761697. doi: 10.1177/1756286418761697. 5. Cree BAC, Bennett JL, Kim HJ, et al. Inebilizumab for the treatment of neuromyelitis optica spectrum disorder (N-MOmentum): a double-blind, randomised, placebo-controlled phase 2/3 trial. Lancet. 2019;394:1352-1363. doi: 10.1016/S0140-6736(19)31817-3.