Overview
11 DESCRIPTION Mirikizumab-mrkz is a humanized immunoglobulin G4 (IgG4) variant monoclonal antibody that is directed against the p19 subunit of IL-23 and does not bind IL-12. Mirikizumab-mrkz is produced in Chinese Hamster Ovary (CHO) cells by recombinant DNA technology and it is composed of two identical light chain polypeptides and two identical heavy chain polypeptides with an overall...
Mechanism of Action
12 CLINICAL PHARMACOLOGY 12.1 Mechanism of Action Mirikizumab-mrkz is a humanized IgG4 monoclonal antibody that selectively binds to the p19 subunit of human IL-23 cytokine and inhibits its interaction with the IL-23 receptor. IL-23 is involved in mucosal inflammation and affects the differentiation, expansion, and survival of T cell subsets, and innate immune cell subsets, which represent sources of pro-inflammatory cytokines. Research in animal models has shown that pharmacologic inhibition of IL-23p19 can ameliorate intestinal inflammation. Mirikizumab-mrkz inhibits the release of pro-inflammatory cytokines and chemokines. 12.
Indications
- 1 INDICATIONS AND USAGE OMVOH is indicated for the treatment of: moderately to severely active ulcerative colitis in adults. moderately to severely active Crohn's disease in adults. OMVOH TM is an interleukin-23 antagonist indicated for the treatment of: moderately to severely active ulcerative colitis in adults ( 1 ) moderately to severely active Crohn's disease in adults ( 1 )
Common Doses
- 300 mg
- 200 mg
- 100 mg
- 900 mg
Dosage
2 DOSAGE AND ADMINISTRATION Prior to Treatment Initiation Evaluate patients for tuberculosis (TB) infection. ( 2.1 , 5.3 ) Obtain liver enzymes and bilirubin levels. ( 2.1 , 5.4 ) Complete all age-appropriate vaccinations according to current immunization guidelines. ( 2.1 , 5.5 ) Recommended Dosage for Ulcerative Colitis Induction Dosage : Week 0, Week 4, and Week 8: Infuse 300 mg intravenously over at least 30 minutes. ( 2.
Contraindications
- 4 CONTRAINDICATIONS OMVOH is contraindicated in patients with a history of serious hypersensitivity reaction to mirikizumab-mrkz or any of the excipients [see Warnings and Precautions ( 5.1 )] . History of serious hypersensitivity reaction to mirikizumab-mrkz or any of the excipients. ( 4 , 5.1 ).
Side Effects
- 6 ADVERSE REACTIONS The following topics are also discussed in detail in the Warnings and Precautions section: Hypersensitivity Reactions [see Warnings and Precautions ( 5.1 )] Infections [see Warnings and Precautions ( 5.2 )] Tuberculosis [see Warnings and Precautions ( 5.3 )] Hepatotoxicity [see Warnings and Precautions ( 5.4 )] Most common adverse reactions are: Ulcerative colitis (≥2%) : Induction : upper respiratory tract infections and arthralgia. ( 6.1 ) Maintenance: upper respiratory tract infections, injection site reactions, arthralgia, rash, headache, and herpes viral infection.
Interactions
- 7 DRUG INTERACTIONS 7.1 CYP450 Substrates Increased concentrations of cytokines (e.g., IL-1, IL-6, IL-10, TNFα, IFN) during chronic inflammation associated with certain diseases including Crohn's disease may suppress the formation of CYP450 enzymes. Therapeutic proteins, including mirikizumab-mrkz, that decrease the concentrations of these pro-inflammatory cytokines may increase the formation of CYP450 enzymes resulting in decreased CYP450 substrate exposure.